Working tool with manual control

FIELD: process engineering.

SUBSTANCE: intention relates to working tools with manual control. Proposed working tool comprises, at least, one control handle. Said handle is coupled with drive motor via, at least, one damping element. Said damping element comprises helical spring with, at least, one end fitted on guide. Helical spring is spaced from guide in first radial distance for first distance. Said first distance is measured in the first plane located perpendicular to working tool lengthwise axis. In second radial distance, helical spring is located at second distance from said guide, smaller than that in the first direction, or said distance equals zero. Second distance is measured in second plane located in transverse direction z and in lengthwise direction x and perpendicular to vertical direction y. Helical spring has central lengthwise axis directed, in fact, in transverse direction. Guide and/or helical spring feature shape other than a circle. At least, one section of said guide features oblate-ring-section and/or helical spring one section is oblate on, at least, one side.

EFFECT: better damping properties.

21 cl, 26 dwg

 

The technical field

The invention relates to a working tool with manual control according to the restrictive part of paragraph 1 of the claims.

The level of technology

From the patent DE 10334906 A1 famous anti-vibration element in a portable working tool with manual control, which includes a coil spring, which has at its extreme stretch of the gap relative to the guide coil spring. Thus the spring with nonlinear characteristics.

Known anti-vibration elements with coil springs have the same stiffness in all directions perpendicular to the longitudinal direction of the coil spring. To obtain a different degree of depreciation in different directions, must be properly adjusted in different directions several anti-vibration elements. To achieve different degrees of cushioning in different directions is also known for anti-vibration rubber trim that have different stiffness in different directions due to the differences of their geometric characteristics.

Disclosure of inventions

The objective of the invention is the creation of a working tool of the appropriate type with manual control, which has a good fibrinoliticeski properties.

This problem is solved by the working tool with manual control signs, referred to in paragraph 1 of the claims.

Due to the fact that the distance from the coil spring to the guide in different directions is different, is achieved in various cushioning effect in different directions. The characteristics of the springs turn out to be different depending on the direction in which operates the load on the anti-vibration element. In the case when in the second radial direction is no distance between the helical spring and the guide, the effective length of the spring in this area, including in the state of no load, is reduced. Because this is a great rigidity of the anti-vibration element in this direction. Thus easily achieved amortization feature, suitable for use with this device. To achieve the necessary degree of cushioning action does not require additional parts, thus, it is possible to configure a cushioning action in existing devices by replacing at least one guide and/or coil spring.

The guide preferably has a support section on which the coil spring is rigidly attached to the guide. Provided that the guide has a guide section on which the spring has a first distance to the guide, and the guide section finds what I am closer to the center of the coil spring, than the reference site. As a consequence, the part that contains the guide is used both for fixing the coil springs in adjacent parts and to adjust damping characteristics. Additional details for fixing the coil springs are not required.

The guide preferably has a cross sectional shape that is different from the right circle shape. In particular, the guide has a cross-section of the oval form. Due to the oval cross-sectional shape in two perpendicular with respect to each other directions is achieved, respectively, the minimum and maximum cushioning effect. In the intermediate directions is achieved by changing the shock-absorbing action with a transition from the maximum to the minimum amortization, in accordance with the cross-section. However, it is also possible to provide for directing at least one transverse section in the shape of a flattened circle or a circle with cut segment. Such cross-section leads to the lowering of the rigidity of anti-vibration element in one direction only, which is flattened or cut the corresponding area. When the load in the opposite direction stiffness remains high. By applying multiple slices in a single transverse széchenyi shall be able to configure the resulting cushioning effect.

In addition to the cross section of the guide, which differs from the shape of a circle, or alternatively, it is envisaged that the spring has a cross-section differing from a circular shape. When this cross-section of the guide and different springs, so that the distance from the guide to the springs are different in different directions. A simple implementation is obtained in the case when the cross section of the spring is in the form of a circle, which guide the tapered section at least on one longitudinal side. In the radial direction, which is flattening and which thus reduces the distance between the spring and the guide increases the stiffness of the anti-vibration element.

The guide preferably has a spiral groove which extends at least part of the guide. The groove defines the passage of the coil spring in the longitudinal direction along the Central longitudinal axis of the anti-vibration element, and in the transverse direction. In particular, the groove along the entire length of the guide. In order to achieve progressive characteristics in the longitudinal direction of the anti-vibration element, it is envisaged that the pilot plot coil spring has a third distance from the groove in the direction the AI Central longitudinal axis anti-vibration element. However, it can also be an option when the spring on the guide section does not interact with the guide elements in the direction of the Central longitudinal axis of the anti-vibration element. Thus, the guide section may have a smooth surface that is easy to manufacture. The groove in this field is not required.

The working tool is preferably a chain-saw, for example, chainsaw, with one of the saw chain driven by passing around the guide on the bus, at least one anti-vibration element is perpendicular to the plane of the bar. This implies that the chain-saw has a longitudinal direction that runs along the guide rail saws, vertical direction perpendicular to the longitudinal direction in the plane of the bar, and a transverse direction running perpendicular to the plane of the bar. Experience has shown that good performance in the damping of vibrations is achieved in the case where the first distance runs in a vertical direction relative to the chain-saw. In the direction of the height of the saws, respectively, provides low stiffness of the anti-vibration element. The second distance is preferably takes place in the longitudinal direction of motopi the s. Thus, in the longitudinal direction of the saws rigidity anti-vibration element is high. The result achieved favorable conditions control the chain-saw. But it is also possible to design, providing that the coil spring has a zero distance to the guide rail in the longitudinal direction of the saws. Thus, we achieve a high rigidity in the longitudinal direction of the saws in this direction is not achieved progressive spring characteristic.

The chain-saw preferably has a pipe-arm, which passes over the motor housing, and the first anti-vibration element is located between the handle and the driving motor. For fixing the coil spring anti-vibration element is provided that the first guide is formed on the handle, and the second guide performed on individual parts. Thus, for the first guide does not require additional parts. The execution of the second guide into its individual parts easy Assembly.

The second guide is preferably connected with a fixing section for fixing on one edge of a drive motor. To compensate for tolerances provides that the mounting area has at least one protrusion, which in the mounted state of the mounting area is in the region of the edges of the AK, the protrusion and/or the edge plastically deformed during installation of the mounting area. Plastic deformation of the lip and/or ribs makes it possible for good compensation of tolerances which occur in the manufacture of the drive motor. Consequently, there is no need for additional processing ribs. The mounting area is set right on the edge, preferably made by casting. The tabs compensate for excessive or insufficient size of the ribs and, in particular, the protrusions are deformed. But it can also be provided and a variant in which the material of the protrusions is harder than the material of the ribs, so that the plastic deformation of the exposed edge. A possible variant, which is preferred plastic deformation and edges, and protrusions. Due to plastic deformation provides a firm attachment of the mounting section to the edge.

The mounting section preferably has a surrounding area, on the opposite sides of which are placed positioning platform, and each positioning pad has at least one protrusion, and the protrusions are located opposite each other. Due to the location of the protrusions facing each other are compensated fairly substantial tolerances. To set the position of the fixing section provided that each positionyou the I pad has at least two protrusions.

Preferably pipe-arm part of the body-arm, which includes a rear handle, and the body-arm connected with the driving motor by means of at least three anti-vibration elements. In order to achieve a good degree of damping of the oscillations, provided that the Central longitudinal axis anti-vibration elements located approximately in the transverse direction relative to the chain-saw. All three anti-vibration element preferably have different degrees of cushioning action in different directions.

A brief list of figures

Examples of execution of the invention are explained below on the basis of the figures of the drawings. They represent:

figure 1 - schematic view of the power saw from the side,

figure 2 - axonometric image of the body-arm saws in accordance with figure 1 with located on the cylinder drive motor,

figure 3 - anti-vibration element according to figure 2 in an exploded image

figure 4 - anti-vibration element according to figure 3 in assembled condition, a top view,

figure 5 - cut anti-vibration element according to figure 4,

figure 6 - image of the section in accordance with figure 5, presents a larger view,

figure 7 is a bottom view of the anti-vibration element with the location is the important to fixing it plot

figure 8 - axonometric image of anti-vibration element located therein mounting area,

figure 9 is an exploded axonometric image of the coil spring anti-vibration element according to Fig.3-8 with a guide that is located on the pipe arm,

figure 10 is a section along the line x-X on 11 anti-vibration element according to Fig.9 with mounted guide

figure 11 is a section along the line XI-XI of figure 10,

figure 12 is a section along the line XII-XII of figure 11,

figure 13 is an exploded axonometric view of embodiment of the execution of the coil spring guide,

figure 14 - cut anti-vibration element according to line XIV-XIV in Fig,

figure 15 is a section along the line XV-XV in Fig,

figure 16 is a section along the line XVI-XVI in Fig,

figure 17 is an exploded axonometric image versions of the guide screw spring,

figure 18 is a section along the line XVIII-XVIII in Fig anti-vibration element according to Fig,

figure 19 is a section along the line XIX-XIX in Fig,

figure 20 is a section along the line XX-XX in Fig,

figure 21 is an exploded axonometric image versions of the guide screw spring,

figure 22 is a section along the line XXII-XXII in Fig anti-vibration element according to Fig,

figure 23 is a section along the line XXIII-XXIII is and pig,

figure 24 is a section along the line XXIV-XXIV in Fig,

figures 25 and 26 is a schematic image in the context of embodiments of anti-vibration elements.

The implementation of the invention

Figure 1 as the version of the working tool with manual control is a schematic representation of the chain-saw 1. However, the working tool with manual control can also be otrezanno grinding machine, machine for mowing lawns or similar device. The chain-saw 1 has a housing 2 of the motor which is the drive motor 3. For clarity, the housing 2 of the motor and the drive motor 3 is depicted by the dotted line in figure 1. The chain-saw 1 has a structural element 4, which includes a rear handle 5 and gripping the pipe 7. In the lower part of the power saw 1 between the front end of the gripping tube 7 and the rear handle 5 passes retainer 14, which is shown in Fig. 2. Further, this structural element 4 in accordance with its function will be called case-arm 4. The rear handle 5 is shown in Fig. 2 the cover 18 of the handle, which is formed as a unit with the housing of the handle 4. The bottom cover 18 of the handle controls, for example, the lever 6 of the control gas is shown in figure 1. The bottom cover 18 of the handle is closed executed separately top cover handle 19, which is shown in figure 1.

On the housing 2 of the motor RA is based on guided bus 8, which is from him forward on the side of the housing 2 of the motor, which is opposite the rear handle 5. The housing 2 of the motor on the side facing the guide rail 8, covered by gripping the pipe 7. On the guide rail 8 is passing around her saw chain 9, which is driven from a drive motor 3.

In the process of operation of the vibration, which affects the body-arm 4, was kept as minimal as possible, it is connected to the housing 2 of the motor or the driving motor 3 by means of three anti-vibration elements 10, 11, 12. The first anti-vibration element 10 is located between the gripping pipe 7 and the driving motor 3. Anti-vibration elements 11 and 12 are located in the lower part of the housing 2 of the motor, while the second anti-vibration element 11 is located on the side of the jumper 14 that faces the guide rail 8, and the third anti-vibration element 12 near the rear handle 5. In addition, between the bridge 14 and the housing 2 of the motor is resistant lug 13, which limits the relative movement between the housing 2 of the motor and housing-handle 4 in the transverse direction z perpendicular to the plane of the bar 8.

Motor saw 1 has a longitudinal direction x along the guide on the bus 8. The vertical y-direction lies in the plane the tee rail bus 8 is perpendicular to the longitudinal direction x. Each vibrating element 10, 11, 12 has a Central longitudinal axis 32, which is mounted essentially in the transverse direction z.

As shown in figure 2, the drive motor 3 is made in the form of an internal combustion engine has a cylinder 15. The cylinder 15 is fixed to the first end 16 of the first anti-vibration element 10. The second end 17 of the anti-vibration element 10 is located on the gripper tube 7. This anti-vibration element 10 is fixed to the cylinder 15 at the height of the cylinder head.

As shown in figure 3, anti-vibration element 10 includes a coil spring 20. The image in figure 3 the coil spring 20 at the first end 16 not shown, is screwed into the first boss or bracket, which is made as one piece with the mounting section 23. The fastening section 23 has a hole 24 for mounting screws 25. The cylinder 15 has a rib 27 on which there is a hole 26 for fastening screws 25. Thus, at the first end of the anti-vibration element 10 is screwed to the cylinder 15. For fixing the second end 17 for gripping the pipe 7 is formed a second lug or bracket 22, which is screwed coil spring 20. Figure 4 anti-vibration element 10 is shown in assembled condition.

5 and 6 show the cut anti-vibration element 10. At the first end 16 to the coil spring 20 is screwed into the first bobick is or cap 21. The first cover 21 is made as a single unit with the mounting section 23. The first cover 21 has a guide 34, which is made in the form of a spiral groove and on which is screwed coil spring 20. On the second cover 22 is provided by the guide 35, which is also made in the form of a spiral groove. Between the two plugs 21 and 22 is a device 31 protection from breakage, shown in Fig.6 by the dotted line.

As shown in Fig.7 and 8, the mounting section 23 has an adjacent section 28, which has a hole 24. On the adjacent site 28 are two positioning pad 29, which are perpendicular to the plane of the adjacent section 28 and is formed with an adjacent plot of U-shape. Each positioning pad 29 is formed of two compensating protrusion 30, which are directed towards each other. Compensating the protrusions 30 have a triangular cross-section, with one of the corners of the triangle directed to the appropriate positioning of the platform 29, opposite him.

As shown in figure 5 and 6, the positioning of the platform 30 are in the region of the ribs 27. When overlaying the mounting section 23 and the rib 27 compensating the tabs 30 and/or the rib 27 is plastically deformed. Giving a pointed shape compensating the protrusions 30 is particularly contributes to the deformation of the ribs 27. the mayor ensures strong binding mounting area 23 on the edge 27. Compensation of manufacturing tolerances of the cylinder 15.

Fig. 9 through 12 show the performance of the guide 35 for example, the second stub 22. The guide 34 in the first end cap 21 is preferably made in the same way. As shown in Fig.9, the second cover 22 is held on its periphery a spiral groove 36, which passes along the entire length of the second stub 22. The individual turns of the groove 36 located next to each other, separated from each other, passing around the circumference of the partition 38. As shown in figures 9 and 10, the groove 36 with cross-section is not circular, and oval. For this reason, the distance from the bottom 37 of the groove shown in figure 10, to the Central longitudinal axis 32 of the coil spring 20, which corresponds to the Central longitudinal axis of the anti-vibration element 10, is changed during a single round.

Figure 11 presents the cut anti-vibration element in the transverse z-direction and in the longitudinal direction x of the saws 1, perpendicular to the vertical direction. As shown in figure 11, the guide 35 has a mounting section 43 and the adjacent guide section 44. The fastening section 43 is located at the end of the coil spring 20, and the guide section 44 is on the side of the fixing section 43, facing the middle of the round. In the fastening section 43 of the coil spring 20 tight nade is and the guide 35. Thus, in the fastening section 43 of the coil spring 20 is firmly fixed on the stub 22.

In the plane of the section shown at 11, to guide section 44 of the coil spring is located at a distance b1 from the bottom 37 of the groove. The distance b1 in the plane of the cross section is nearly constant along the entire length of the guide section 44. In the direction of the Central longitudinal axis 32 of the coil spring 20 is located at a certain distance a (the line parallel to the Central longitudinal axis 32 of the anti-vibration element 10,) to the walls 38, bounding the groove 36. Thus, the coil spring 20 is able to move relative to the Central longitudinal axis 32 in a limited period, in both parallel and perpendicular to the Central longitudinal axis 32 direction. When the coil spring 20 overcomes the distance a or b1, coil spring 20 is adjacent to the guide 35. This increases the rigidity of the coil springs 20, since only the coils that are located outside of the guide 35 and the coil spring 20, and promote elasticity. At the bottom of the groove 37 of the plug 22 in the plane of the section shown at 11, has a diameter of c1. The plug 22 has a hole 33 which is, for example, to accommodate the device 31 protection from breakage, shown in Fig.6.

In Fig. 12 presents a cut anti-vibration cell battery (included) is that 10 plane perpendicular to the longitudinal direction x. As shown in Fig. 12, the bottom 37 of the groove is located at a certain distance b2 in the radial direction (toward the Central longitudinal axis 32) from the coil spring 20 on the first turn of its guide section 44 adjacent to the mounting area 43. In the next turn distance in the radial direction is increased to a value of BS, and the next turn is to the value of b4. As a result, the distance b between the bottom 37 of the groove and the helical spring 20 increases as it approaches the middle of the coil springs 20. In this case, all distances b2, b3, b4 in this section is greater than the distance b1 in cross section, as shown figure 11. In the axial direction is also stored distance and. As seen on Fig cap 22 in cross section, shown in Fig has on the side facing the center of the coil spring, the diameter of c2, which is considerably less than the diameter of c1. The diameter of c2 can, for example, be approximately 60% to 90% of the diameter of c1.

Due to different distances from the guide 35 to the coil spring 20 shown in both Fig. 11 and 12, the section planes with anti-vibration element 10 is in the vertical y-direction rigidity different from the rigidity in the longitudinal direction x of the power saw 1. Because the distance M is in the longitudinal direction x, and the distance b2, b3 and b4 in the vertical direction y, gestco the ü anti-vibration element in the longitudinal direction x more than in the vertical direction. Anti-vibration elements 11 and 12 preferably are made so that their rigidity in the vertical direction y is smaller than the rigidity in the longitudinal direction X. In this section of the coil spring 20 is circular in shape and its diameter is constant.

In the embodiment shown in Fig. 13 through 16, is provided by the plug 42, which is screwed coil spring 40. The cap 42 has a guide 45, which is made by passing around her spiral groove 46. The groove 46 runs along the entire length of the stub 42. Adjacent grooves 46 are separated from each other by a spiral partition 48 passing around the plug. As shown in Fig, coil spring 40 throughout its length has a cross section whose shape deviates from a circular shape. Coil spring 40 has a flattening or sections 41 on the longitudinal sides located opposite each other, around which coil spring 40 has a diameter d1. The diameter d1 is smaller than measured perpendicular to its direction in an area that has no upasani or slices, diameter 62. The groove 46 is shown in Fig the bottom 47 of the groove, which runs around the Central longitudinal axis 32 in a spiral with a constant radius. The bottom 47 of the groove at any cross section is the same distance to the Central about Olney axis 32.

As seen in section in Fig. 15, in the plane perpendicular to the longitudinal direction x, the coil spring 40 is located at a distance f from the guide 45. The distance f is in the guide section 54 that abuts the fastening section 53. In the guide 45 of the fixing section 53 is firmly fixed coil spring 40. Guide 45 has a larger diameter than the guide section 54. On guide section 54 of the bottom 47 of the groove has a diameter of g, which is constant along the length of the guide section 54. In the axial direction of the coil spring 40 is located at a distance e from the partition 48. Therefore, the coil spring 40 on the guide section 54 has the ability to slightly move in the plane of the section shown in Fig as in the direction of the Central longitudinal axis 32 and in the direction of her perpendicular.

In the plane of the section shown in Fig perpendicular to the vertical direction, coil spring 40 also runs on guide section 54 at the bottom of the groove 47. Because of the flattening 41 coil spring 40 in this area has a reduced diameter d1, which is selected in such a way that between the coil spring 40 and the bottom 47 of the groove there is a close contact. In the axial direction here, too, there is a slight distance that is because it is tight screw prog who were 40 to the bottom 47 of the groove here is not expected mobility in the longitudinal direction x of the power saw 1. Anti-vibration element made in accordance with figures 13 to 16, has the direction of increased stiffness.

Fig. 17 to 20 show another variant implementation of the anti-vibration element 10, with a different version of the guide and the coil springs. Coil spring 20, which is shown in Fig has a constant cross section of the circular form. Provided by the plug 52, which has a first guide 55 and the second guide 59. The first guide 55 is located in the groove 56, which is limited to a spiral baffle 58. In the area of the second guide 59 is not provided for passing around part of the septum or passing around part of the groove. In the longitudinal direction of the coil spring 20, the plug 52 in the region of the second guide 59 is made smooth.

As shown in Fig. 18, in the region of the second guide 59 cap 52 has a first diameter i1, which is more than located perpendicular to it, the second diameter i2. As seen on Fig, in the region of the first guide 55 the support section 63, on which the coil spring 20 is firmly fixed on the guide 55. The second guide 59 forms a guide section 64. In the shown Fig section plane perpendicular to the vertical direction, coil spring 20 is adjacent to the second guide 59. The diameter of i1 the second voltage is alausa 59 in this section plane is constant. On the support section 63 of the coil spring 20 is attached to the bottom 57 of the groove and firmly mounted on the guide 55.

As demonstrated Fig, the second guide 59 is made in the direction perpendicular to the longitudinal direction x, with a conical narrowing. On the side facing the middle of the coil spring 20, the guide 59 has a diameter of i2, which may be, for example, from about 60% to 90% of the diameter of i1. The cross-section of the guide 59 is made in the form of an oval. As seen on Fig, coil spring 20 is located at a radial distance h1 from the guide 59, which, with the passage of one coil increases up to a distance h2. Because of the increase of the distance h is achieved progressive feature anti-vibration element when the load in the vertical direction y. In the longitudinal direction x of the characteristic is linear because of the fit of the coil spring 20 to the guide 59.

In the embodiment shown in Fig. from 21 to 24, provided by the plug 62, which has a first guide 65 and the second guide 69. The first guide 65 is made in the form of a groove 66, which is limited to passing around the circumference of the spiral baffle 68. In the area of the second guide 69 partition 68 is not provided, so that in this area of the coil spring 20 is held in the Central direction is rodolniy axis 32 without a guide.

As can be seen in the figures, the cap 62 has a second guide 69 first diameter I1 and measured perpendicular to its direction of diameter I2, which is less than the diameter of I1. When this cross-section of the stub 62 is asymmetric. The plug 62 has one side cut 70, which causes the reduced diameter I2. On the opposite side of the cap 62 is made in the form of a circle.

Fig demonstrates cut anti-vibration element in a plane perpendicular to the vertical direction y. On the supporting section 73 of the coil spring 20 is held in the groove 66 and durable it fixed. In the guide section 74, bordering support, coil spring 20 has a slight transverse distance m to the guide block 69. On the supporting section 73 of the coil spring 20 is attached to the bottom of the groove 67.

As shown in Fig in section, perpendicular relative to the longitudinal x-direction, the coil spring 20 on the one hand is located at a small distance m from the guide 69. On the opposite side of the plug 62 has a slice 70. Thus, on this side achieved increased distance k1 in the radial direction, which increases to a value of k2 as it approaches the middle of the coil springs 20. Due to this coil spring 20 has the ability to move up in the image nafig, relative to the stub 62, until, until you overcome the distances k1 and k2. Thus, in this direction is achieved by a progressive characteristic. In the opposite direction, i.e. when the motion of the coil springs 20 down the image on Fig, perhaps only a very small relative movement, to fit the coil spring 20 to guide 69 after overcoming distance m. This results in varying degrees of stiffness of the spring in different directions.

On Fig schematically shows a variant of the guide 75, which is adjacent to the inner circumferential surface 76 is not shown coil spring. Guide 75 has a cross-section which deviates in shape from the circle, while the inner surface 76 of the spring has a round shape. The cross-section of the guide 75 is similar to the triangle with rounded corners. In three areas, separated from each other by approximately 120° each, guide 75 has a radius n. In this region the spring fades into the distance p from the guide 75.

In each of the intermediate regions guide 75 has a second, larger radius of O. In the region of the second radius of the guide 75 has a very small radial distance q to the inner surface 76 of the spring. Thus, the coil spring 76 is able to pass sravnitelnaia distance in directions in which a distance R, is low rigidity. In directions in which the distance q is possible only slight relative movement, so that they provide a larger stiffness.

In the version presented on Fig, provided guide 85 which form cross-section corresponds to a square with rounded corners and is not shown inside the coil spring, the inner surface 86 which has a round shape. In the field rounded corners guide 85 has a radius r, which is slightly less than the inner radius of the spring. Between the guide 85 and the inner surface 86 of the spring there is a very small first distance t. In each of the areas located between the rounded corners, the guide 85 is the radius of s, which is smaller than the radius r. In the areas between the guide 85 and the inner surface 86 of the spring has a second distance which is substantially greater than the first distance t. As a result, in these areas there is a greater relative movement of the coil spring relative to the guide 85. Thanks to this performance also possible to obtain different degrees of hardness in different directions.

Also provides an option in which the screw is rugina, and guide have a cross-section deviating from a proper round shape. Preferred may also be other or asymmetric cross-section. All three anti-vibration element 10, 11 and 12 preferably performed with different values of stiffness in different directions themselves are directed in such a way that achieves high rigidity in the longitudinal direction x and a slight stiffness in the vertical direction y.

1. Working tool with manual control with a drive motor (3) for driving the working body of the tool, with at least one handle (5) for controlling a work tool during operation, with the handle (5) is connected with a drive motor (3) via at least one anti-vibration element (10, 11, 12), and anti-vibration element (10, 11, 12) includes a coil spring (20, 40), which at least one end is located on the guide(34, 35, 45, 59, 69, 75, 85), moreover, the coil spring (20, 40) is from the guide(34, 35, 45, 59, 69, 75, 85) in the first radial direction at the first distance (b2, b3, b4, f, h1, h2, k1, k2, p, u), and the first distance is measured in a first plane perpendicular to the longitudinal direction (x) of the working tool, wherein the second radial direction of the coil spring (20, 40) is from h is sending (35, 45, 59, 69, 75, 85) on the second distance (b1, m), smaller than the first direction, or the distance is zero, and the second distance is measured in the second plane running in the transverse direction (z) and in the longitudinal direction (x) and perpendicular to the vertical direction (y)and coil spring (20, 40) has a Central longitudinal axis (32)which is directed essentially in the transverse direction (z), and guide(35, 59, 69, 75, 85) and/or coil spring (20, 40) has a cross-section other than a circle shape, and guide (65) at least one section has a cross section in the shape of a flattened circle and/or coil spring (40) on at least one tapered section with at least one longitudinal side.

2. A working tool according to claim 1, characterized in that the guide (35, 45, 55, 65) has a reference section(43, 53, 63, 73), on which the coil spring (20, 40) rigidly attached to the guide(35, 45, 55, 65), and the guide section(44, 54, 64, 74), on which the coil spring (20, 40) is at a certain distance (b2, b3, b4, f, h1, h2, k1, k2) from the guide (35, 45, 55, 65), moreover, the guide section (44, 54, 64, 74) is located at a shorter distance from the middle of the coil spring (20, 40)than the reference plot(43, 53, 63, 73).

3. A working tool according to claim 1 or 2, characterized in that the guide(35, 59, 69, 75, 85) has a cross-section shape to the showing is different from the shape of a circle, moreover, the inner surface of the coil spring (20) has a round shape.

4. A working tool according to claim 3, characterized in that the guide (35, 59) has an oval cross-section.

5. A working tool according to claim 2, characterized in that the coil spring (40) on the guide section (54) is made in the form of a circle, flattened at least on one longitudinal side.

6. A working tool according to any one of claims 1, 2, 4 and 5, characterized in that the guide(35, 45, 55, 59, 65, 69, 75, 85) made on the stub(21, 22, 42, 53, 62), jutting inside the coil spring (20, 40).

7. A working tool according to any one of claim 2, 4 and 5, characterized in that the guide (35, 45, 55, 65) includes a groove (36, 46, 56, 66) of the spiral form, which passes through at least one section of the guide(35, 45, 55, 65).

8. A working tool according to claim 7, characterized in that the groove (36) with cross-section in the shape of an oval.

9. A working tool according to claim 7, characterized in that the groove (36, 46) along the entire length of the guide (35, 45).

10. A working tool according to claim 7, characterized in that the coil spring (20, 40) in the pilot area (44, 54) is located on the third distance (a, e) from the groove (36, 46) in the direction of the Central longitudinal axis (32) anti-vibration element (10).

11. A working tool according to claim 7, characterized in that the coil spring (20) on the guide section (64, 74) passes in healthy lifestyles the research Institute of the Central longitudinal axis (32) anti-vibration element (10), without interaction with the guide elements.

12. A working tool according to any one of claims 1, 2, 4, 5, 8-11, characterized in that the working tool is a chain-saw (1) saw chain (9), driven around the guide rail (8), and at least one anti-vibration element (10, 11, 12) is directed perpendicular to the plane of the bar (8).

13. A working tool according to item 12, characterized in that the chain-saw (1) has a longitudinal direction (x)along the guide rail (8), vertical direction (y), passing in the plane of the bar (8) perpendicular to the longitudinal direction (x)and transverse direction (z)perpendicular to the plane of the bar (8), and the first distance (b2, b3, b4, f, h1, h2, k1, k2) is the distance in the direction (y) height saws (1).

14. A working tool according to item 13, wherein the second distance (b1, m) is the distance in the direction of (x) the length of the saws (1).

15. Work tool 14, characterized in that direction (x) of the length of the saws (1) coil spring (20, 40) is at zero distance from the guide (45, 59).

16. A working tool according to any one of claims 1, 2, 4, 5, 8-11, 13-15, characterized in that the working tool has a tube-handle (7)covering the motor housing of the working tool, and the first anti-vibration element (10) races is ologen between the tube-handle (7) and the driving motor (3).

17. A working tool according to item 16, characterized in that the first guide (35) is formed on the tube-handle (7)and the second guide (34) is arranged on a separate structural element.

18. A working tool according to any one of claims 1, 2, 4, 5, 8-11, 13-15, characterized in that the guide (34) is connected with the mounting section (23), which serves for fixing relative to the edges (27) of a drive motor (3)and the fastening section (23) has at least one projection which, when assembled position of the fastening section (23) is in the region of the ribs (27), so that the protrusion and/or edge (27) when mounting the mounting section (23) is plastically deformed.

19. Working tool for p, characterized in that the fastening section (23) has a surrounding area (28), on the opposite sides of which are positioning pad (29), and at each site (29) formed at least one projection, and the projections are located opposite each other.

20. A working tool according to claim 19, characterized in that each of the positioning pads (29) has at least two tabs.

21. A working tool according to any one of p, 19, 20, characterized in that the tube-handle (7) is part of the body-arm (4), which includes a rear handle (5), and case-arm (4) is connected with a drive motor (3) via at less the th least three anti-vibration elements (10, 11, 12), and a Central longitudinal axis (32) of anti-vibration elements (10, 11, 12) is located approximately in the transverse direction (z) of the working tool.



 

Same patents:

FIELD: machine building.

SUBSTANCE: spring is twisted and can have both cylindrical and profiled shape. Attachment flanges are connected to edges of spring. A cavity excluding the contact of extreme working turns of spring with flanges is made on each flange. Extreme turns are bent and cut so that spring turns do not contact each other during spring compression with flanges at maximum load. Threaded holes are made in extreme spring turns on flat surfaces of their contact to attachment flanges. Attachment flanges are provided with holes opposite threaded holes and attached to extreme spring turns by means of screws.

EFFECT: improving manufacturability of spring design.

2 cl, 1 dwg

FIELD: transport.

SUBSTANCE: car variable-rigidity spring support 1 consists of main part 6 and rigid or semi-rigid insert 7. Suspension spring 1 rests directly onto rigid or semi-rigid insert 7. Said main part 6 comprises truncated-cone base 8 running from smaller diametre top side. Truncated cone elongation 9 runs coaxially from said base, elongation larger diametre being smaller than least diametre of base 8. Insert 7 comprises truncated-cone base 13 running from smaller diametre top side. Truncated cone elongation 14 runs coaxially from said base. Insert 7 has axial cavity with its inner shape and sizes corresponding to outer shape and sizes of elongation 9 of main part 6.

EFFECT: simplified design of support element.

9 cl, 8 dwg

FIELD: transport.

SUBSTANCE: invention relates to automotive suspensions and transport facilities incorporating such suspension. Suspension comprises spring 1, cover 3 and centering cup 7 supporting coiled spring end 2 in cover 3. Centering cup 7 has its top part provided with, in fact, round, press-fitting 11 that forms hollow part to receive cover 3. Ribs 14 are arranged along inner edges of cover 3. Shape of ribs 14 allows their arrangement on ledge 13 made inside press-fitting 11. Cover 3 and centering cup 7 comprises appliances to lock angular position of spring 1 relative to cup 7. Press-fitting depth varies continuously to make inclination over entire length interact with cover 3 and coiled spring end. The deepest part of press-fitting 11 forms locking appliances for edge 10 of cover 3. Transport facility comprises abode described suspension.

EFFECT: fixed angular position of spring in cover and on centering cup, simplified suspension assembly.

6 cl, 3 dwg

FIELD: transport.

SUBSTANCE: invention relates to automotive industry, particularly to suspensions. Proposed device comprises spring with different-diametre coils secured between the spring support plates. Inner and outer support plates 4, 3 are fitted on cylinder 6 of shock-absorbing post and radially spaced apart. When in 1st shock-absorbing position, spring 1 rests by section 1a of smaller-diametre coils d upon inner support plate 4. In 2nd shock-absorbing position (II), spring 1 rests by section 1b of larger-diametre coils D upon outer support plate 3.

EFFECT: simplified spring adjustment.

11 cl, 3 dwg

FIELD: construction, road engineering.

SUBSTANCE: invention is related to device for suspension of sound-insulation elements. Spring-loaded suspension comprises spring (6) and two fixtures (5, 7) for spring. One fixture (7) for spring is fixed on device (8) for suspension. Spring (6) is screwed onto first fixture (7). The second fixture (5) for spring is fixed on opening of sound-insulation element (3) by means of pressing disks (2, 4) and is screwed in spring (6) so that around 3 turns of spring (6) are left free. Spring (6) is made with rigidity that makes from 15000 N/m to 25000 N/m. Sound-insulation wall consists of bearing structure socle and spring-loaded suspensions. Sound-insulation elements of wall are fixed by means of spring-loaded suspension.

EFFECT: creation of frameless structure able to introduce efforts from all directions through fixing device into bearing structure.

2 cl, 1 dwg

FIELD: mechanics.

SUBSTANCE: invention relates to helical spring fastening and spring tension adjustment device. The proposed device comprises plate (P1) with two rows of holes (12, 13) spaced for a distance equal, approximately, to spring coil diametre. Holes of one row are displaced with respect to those of the other row. Plate (P1) is furnished with a gripping-locking device with a threaded rod that has a hook arranged on its one end. Aforesaid threaded rod is screwed into inner thread (15) made in plate (P1) with the plate axis parallel to that of the spring. Plate (P1) arranged between the rows of holes (12, 13) features the shape allowing aforesaid threaded rod passage. Plate (P1) comprises cylindrical wall with inner thread (15) arranged between two rows of holes (12, 13). Two flat parts (10) of plate (P1) are arranged on both sides of aforesaid cylindrical wall.

EFFECT: reliable fastening and accurate spring tension adjustment.

2 cl, 4 dwg

Combined spring // 2346194

FIELD: mechanical engineering.

SUBSTANCE: invention relates to general mechanical engineering and can be used in production of new spring-loading devices. Combined spring comprises a compression spring; round holders with diameter exceeding that of the spring and with an inner channel in the upper wall are mounted at the end turns of the compression spring. The upper wall shape is analogous to the end turn shape. The holders embrace the turn by two thirds or three fourth of the turn circle and are fixed on it by any way known. Part of the upper wall excluding the inner channel entry is fitted with lower vertical flanging which is set wider than the spring outer diameter and with its height being equal to the spring wire diameter. Prominent part of the channel is located below the upper wall. A flat stop with its height being equal to the spring washer height is rigidly fixed at the top of each holder; it is centred and set vertically. The washers are round with central symmetrical slot, the slot shape is analogous to that of the stop. The slot provides for free fitting of the washers at the stops with the possibility of being taken off, they can be fixed by a screw with tapered head. The screw is screwed into the threaded opening in the stop centre. A clearance hole with its diameter exceeding that of the screw is made coaxially to the threaded opening; the clearance hole has a tapered reaming of the screw head entry hole so that the head can be set countersunk in respect to the washer side surface. Spring-loaded parts or units of the machine which can be moved are rigidly or pivotally connected to the washer butts on the both ends. The possibility of spring-loading in two mutually inversed directions is provided.

EFFECT: possibility of spring-loading in two mutually inversed directions is provided.

2 dwg

The invention relates to suspensions of vehicle wheels with dynamically variable elasticity or stiffness

Driven tool // 2487791

FIELD: process engineering.

SUBSTANCE: invention relates to hand tool. Proposed tool comprises motor to drive tool cutting adapter, cylindrical casing, cylindrical cover and handle. Said handle is confined by casing and cylindrical cover. Handle outer surface has multiple ledges, each extending between casing and cylindrical cover along tool lengthwise axis. Each said ledge features triangular cross-section visible in handle lengthwise direction and tool horizontal position. Ledges located at top region, above handle centre line, feature triangular shape with inclined surface on the side of top surface extending from base to top and inclined surface on bottom surface, shorter than top inclined one. Ledges located at bottom region, above handle centre line, feature triangular shape with inclined surface on the side of bottom surface extending from base to top and inclined surface on top surface, shorter than bottom inclined one.

EFFECT: ease of handle grip.

6 cl, 4 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to vibration isolation of hand-held tools. Proposed tool comprises case with end area whereto tool adapter is secured, handle to be secured to said body, resilient element, intake part on body side to support resilient element, and intake part of handle side to support resilient element. Resilient element and intake parts on body side and handle side make vibration isolation part. Vibration isolation part is configured to make elastic strain in resilient element display as shear strain in every direction, i.e., in axis Z defined along axial direction of tool adapter and axes Y and X intersecting axis Z. Note here that resilient element is arranged in vibration isolation part between intake part on body side and intake part on handle side if seen in direction of X, Y and Z axes.

EFFECT: decreased vibration.

20 cl, 21 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to mechanised tool body design. Tool body comprises U-like hook with two legs, hook socket, and locking mechanism.Said hook displaces between position whereat its left leg extends to the left to receive the hook and that whereat its right leg extends to the right to receive the hook, and position whereat its left and right legs are located in aforesaid socket. Locking mechanism retains the hook in all aforesaid position.

EFFECT: ease of use.

16 cl, 11 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to machine building. Proposed device comprises brush part and structural part to be secured on tool vase, and pair of fixed contacts to be connected to motor winding. Said brush part makes motor brush holder to revolve about structural part. Said brush part has pair of moving contacts arranged between fixed contacts to change conditions of contact between said fixed and moving contacts by rotation. End of any said contact represents an elastic end to be deformed in contact with another contact. Structural or brush part has a regulative part adjoining to elastic part for regulation the degree of deformation thereof.

EFFECT: longer life.

12 cl, 8 dwg

Cutting tools // 2469840

FIELD: machine building.

SUBSTANCE: cutting tool includes a tool assembly with cutting blade and a handle. The latter is continued from the tool assembly. The handle is continued parallel to the surface of rotating cutting blade. The handle includes front end and rear end. Front end is located on the side of tool assembly and on front side in relation to the saw-cut direction. Rear end is configured as a free end. When saw-cut depth of the machined part is set to maximum, the handle has upper part that is convex in upward direction with the first curvature coefficient, downward bending front area on the front side of upper part and downward bending rear area on rear side of upper part. Distance between upper part and front end is shorter than distance between upper part and rear end. Rear area is convex in upward direction and has the second curvature coefficient that is less than the first curvature coefficient. As per the second design version, cutting tool includes a tool assembly with rotating cutting blade and a handle. The latter is continued backwards from the tool assembly. Handle includes front end on the side of tool assembly, rear end on the side that is opposite to front end, front area that includes front end, intermediate part and rear area that includes the rear end. Front area is continued between the tool assembly and intermediate part. Rear area is continued backwards from intermediate part. Rear end is configured as a free end. Intermediate part and rear area are rounded in one and the same direction.

EFFECT: improving convenient and simple use of cutting tool in operation.

16 cl, 20 dwg

Cutting device // 2468911

FIELD: process engineering.

SUBSTANCE: invention relates to machine building and may be used in machining by disc tool. Proposed device comprises table to accommodate part to be machined, guide ruler to locate said part atop the table, and machining tool arranged to displace vertically on said table. Cutter assembly said drive, rotary tool and cover to close tool top part. Cover has bottom end section including first and second parts arranged on opposite sides relative to tool rotational axis. When cutter assembly is located, in fact, at extreme bottom position, said first part is located at first level and vertically opposite aforesaid ruler while second part is located at second level and out of opposition relative to ruler. First level is located above second level. Invention covers several design versions.

EFFECT: fast and accurate cutting.

22 cl, 11 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to electrically driven tools. Electrically driven tool comprises drive motor 12, bearing assembly 14 and assembly 66 to joint the drive with bearing assembly 14. Assembly 66 comprises centering assembly 18 to position drive 12 in assembling it with bearing assembly 14. Bearing assembly 14 is furnished with element 20 to ensure geometrical closure. Bearing assembly 14 comprises bearing bushing 22 to receive drive 12. Element 20 is arranged on surface 24 of element 22 directed radially inward.

EFFECT: accurate positioning of drive assembly, rules out play and clearances.

9 cl, 6 dwg

FIELD: machine building.

SUBSTANCE: invention relates to manual machines with an intermediate flange designed for placement of elements of a transfer mechanism. The intermediate flange of the manual machine comprises a body part with a support section. In the area of the support section there is at least one slot-like hole.

EFFECT: invention facilitates assembly of transfer mechanism elements.

12 cl, 3 dwg

FIELD: machine building.

SUBSTANCE: invention relates to manual electric machines. To fence a rotating working element of an electric machine, a protective jacket is provided. The jacket is fixed on a machine by means of a device, which comprises two mirror fixing elements to stop the jacket against slipping relative to the machine body and two lever control organs. Each of control organs complies with one of fixing elements to manually open a connection between a machine body and a protective jacket.

EFFECT: invention provides for higher reliability of protective jacket fixation on a body of an electric machine due to action of fixing elements in opposite directions and reduced probability of random unlocking of a connection due to necessity to act at two control elements.

11 cl, 32 dwg

FIELD: machine building.

SUBSTANCE: hand-held machine contains a housing and a handle interconnected by turning fastening and vibration-isolating unit to linear motion guide. Linear motion guide contains two linear guide elements, each of them is installed in elastic vibration-isolating element with possibility of directed movement in it. Each vibration-isolating element is designed as a bushing with through-hole guiding movement of linear guide element. Linear guide elements are rigidly fixed on handle. Vibration-isolating elements are fixed on housing.

EFFECT: preventing transmission of impact load from housing to handle.

15 cl, 3 dwg

Angular adapter // 2463154

FIELD: process engineering.

SUBSTANCE: invention relates to machine building, namely, to working tool holders made up of angular adapters to be fitted on rotary drive. Proposed adapter comprises casing, handle and body accommodating two shafts with bevel gears fitted thereon. Section of one of said shafts has tetrahedron to receive wrench and thread whereon screwed are discs or nuts to lock grinding wheel of saw blade. Another shaft is to be coupled with rotary drive.

EFFECT: compact and simple design.

4 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to hand tool. Proposed modular hydraulic tool consists of basic assembly and interchangeable modules. Permanent basic assembly is made up of hydraulic tool working member assembly consisting of power mechanical section integrated with power hydraulic cylinder with surfaces of hydraulic and mechanical connections.

EFFECT: varying tools versions including hydraulic and mechanical units.

3 cl, 2 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to hammers that served to check up couplings, measure sliders, reveal car body misalignment and overload, pinpoint faults and repair braking equipment. Proposed hammer comprises elongated metal handle, one part of the latter supporting metal strike part and the other being furnished with wedge. Said striking part represents a solid striker on foot secured at a distance from metal handle end. Sharpened part is made on handle end and hook is made on opposite side of aforesaid striping part.

EFFECT: higher quality of car servicing, reduced costs and time of servicing.

3 cl, 4 dwg

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