Method of and device for handling large-size bolted joints of tower crane slewing circle in confined areas (versions)

FIELD: mechanical engineering; tower cranes.

SUBSTANCE: invention relates to means of tightening bolts or nuts of larger-size bolted joints. Method includes manual turning in and off of bolt of bolted joint by rotating bolt head by lever wrench until definite axial force appears in threaded joint with subsequent tightening of bolt by mechanical tightening member. Prior to tightening bolt or prior to its backing off, wrench is connected with first bolt of bolted joint of slewing circle, and then lever of member is connected with second bolt of bolted joint, then lever of member and lever of wrench are connected in plane of arrangement of bolt heads. Wrench and member lever are locked to prevent displacement in vertical direction, and then distance between lever of wrench and second bolt of bolted joint is decreased or increased. Invention provides three design versions of device for implementing the method.

EFFECT: provision of compact device for use in confined spaces.

5 cl, 9 dwg

 

This invention relates to means for screwing and unscrewing bolts or nuts large bolt connection manually with the use of auxiliary mechanical means for final tightening bolts or nuts and delays in the reverse direction. The invention relates to wrenches, wrenches, with fixtures and mechanical means, in which the element interacts with the screw nut or bolt is rotated together with the lever arm of the wrench from the action of the levers or other means, which reported the force from a mechanical drive when manual force for screwing the nut or bolt (or unscrewing) is not enough.

A device for screwing and unscrewing nuts and bolts bolted joints in which the lever wrench, interacting with a rotary head mounted adjacent the bolt head of the bolt connection, rotated by a small angle from the rotary head, which is made with eccentricity [1].

In another known device that uses the principle of screwing one screw connection by means of focus to another bolt connection, applied a lever mechanism including a wrench lever key with a faceted head at one end, thread narukage key a threaded nut on the threaded section of the lever key, which in cooperation with the lever forms a key plate, and pivotally connected with the stem nut swing arm, the other end of which is pivotally connected to the other faceted head for another bolt bolt coupling [2, 3].

This device cannot be used in cramped conditions the location of the node machines, for example in confined conditions and location of the rotation mechanism of a tower crane.

A device for unscrewing and screwing of the bolt connection, containing a faceted head, the holder head with two shoulders lever, one end of which is screw mechanism of rotation of the lever relative to the connected details [4].

This device determines a complex scheme of institutions faceted head to head otvincivatmisa bolt.

Known anchoring device for tightening large threaded connection lever wrenches, comprising a housing in the form of two shoulders of the lever and located on two ends of the coupling head with mutually movable bushings, which are designed to be installed on the nut adjacent to tighten the nut, and to adjust the axle spacing collar heads, in this case in the middle part provided with rigidly connected with it by a clutch, which made the cut on the opening for connection with a faceted end, tighten the bolt [5].

This device is intended for Assembly units of machines in a manufacturing environment, it does not meet the conditions of its use in a tight space the compact arrangement of the parts when tightening or loosening the large bolted connections.

In another known technical solution is to build a large threaded connections applied power mechanism, in particular a planetary gear connected to the lever key made with the working cylinder, pivotally connected with the arm or lever key thrust and thrust element [6].

Similar to the device [6] it is another device to tighten the large screw connections, which ensure operation in the confined space of the thrust element is placed on the output shaft and is made with the ledge, resting in the threaded connection, and the device is provided with a lever, one end of which is rigidly connected with the housing, and the other pivotally connected to the thrust, the ratio of the lengths of the arm and the lever is selected in the range of 5/2 [7].

A significant disadvantage of this device is the low level of its compactness. The second, more significant drawback is the fact that the mentioned thrust has been in this unit for compression and bending that at high loads leads to kerabatsos the particular device or to the necessity of increasing its weight and size due to the increase of the thrust section.

It is also known a device for tightening nuts, containing two hrapovic key, socket head, the rods are fixed in hrapovic keys, and thrust with arm connecting the ratchet keys between themselves, where the device is attached to the rod butt heads ligament (coupler) with brake discs, each of which communicates with the inner race of the corresponding ratcheting wrench [8].

This device does not meet the conditions of repair support-rotating circles of tower cranes in cases of replacement bolts and retightening them due to the poor layout of the device.

The closest technical solution of the essence and the achieved effect to presented in this description of the invention the method of screwing and unscrewing the large bolted joints bearing slewing circle tower crane in cramped conditions is a well-known method of tightening threaded connections with wrenches, which produce screw the nut until the screw connection of a certain axial force, followed by tightness through giving in threaded connection a certain dose of energy, and the method is characterized by the fact that in order to improve the accuracy of the final torque, the magnitude of the dose of energy ask relevant work in threaded connection to what I needed to get it set end torque [9].

Common signs of a well-known method of screwing and unscrewing the large bolted joints and method of screwing and unscrewing the large bolted joints bearing slewing circle tower crane in cramped conditions, which are presented in this description of the invention is that both methods include the tightening of each bolt connection manually by rotating the bolt head lever wrench, until the threaded connection of a certain axial force and the torque bolt mechanical coupler, and when performing the operation of loosening the bolts used first mechanical coupler to rotate the bolt head lever wrench until the screw connection of a certain axial force required for the operation loosening the bolts with a wrench manually.

The closest device to implement the method presented in this description of the invention, the essence and the achieved effect is a device for screwing and unscrewing of large bolted joints, which applied the gearbox, which is connected with lever key [7].

The General characteristics of the known device [7] and device for screwing and unscrewing of large bolted joints bearing slewing circle basin is on tap in cramped conditions, presented in this description of the invention is that the device include connected with one bolt head of the bolt connection nut lever key, the end of which is pivotally connected with a coupler having at the end of the cut sleeve connected to the head of the other bolt, and gear.

Solved and achieved the present invention is to create a compact device for use in confined conditions with large bolted connections, support and turning circles of tower cranes in operation of these machines.

The technical problem is solved in that in the method of screwing and unscrewing the large bolted joints bearing slewing circle tower crane in cramped conditions, including the operation of screwing the bolt threaded connection manually by rotating the bolt head lever wrench, until the threaded connection of a certain axial force and the torque bolt mechanical coupler, and when performing the operation of unscrewing operation of loosening the bolt mechanical coupler by turning the head otvincivatmisa bolt until the threaded connection of a certain axial force, after which the operation is carried out loosening the bolts with a wrench manually - operas before the Nations tighten the bolt or before surgery it ropes in the opposite direction, first connect the key with the first bolt bolt connection support-rotating steep, then connect the lever of the coupler with the second bolt bolt connection, fix the key and coupler from moving in the vertical direction, then the lever couplers and lever key interconnected in the plane of the heads of the bolts bearing slewing circle, and then screed reduce or increase the distance between the end of the lever wrench and second bolt bolt connection.

In the device for implementing the method, including connected with the bolt head of the bolt connection support-rotating circle tower crane wrench lever key, the end of which is pivotally connected with a coupler having at the end of the cut sleeve connected to the head of the other bolt, and the gear - coupler is made of a guide to set it slide, which is connected to the gearbox end of the arm coupler is installed on the cut sleeve, with the possibility of rotation of the lever of the coupler relative to the sleeve, a slide pivotally connected to the lever couplers or connected with him through a series of hinged interconnected links.

In another embodiment, the device includes connected with one bolt head bolted connection support-rotating circle tower crane wrench lever key, the end of which is connected with a coupler, and eUSA at the end of the cut sleeve, connected to the head of the other bolt, and a gearbox, the gearbox housing is made from protruding from his arm, pivotally connected with the end of the lever rod, and a housing connected with the end of lever wrench movably, and the output shaft of the gearbox is connected with the end of the lever wrench motionless.

In the third variant of the device, including connected with the bolt head of the bolt connection support-rotating circle tower crane wrench lever key, the end of which is pivotally connected with a coupler having at the end of the cut sleeve connected to the head of another connecting bolt, and the gearbox contains the securing bar, pivotally connected with lever key and the end of the lever rod, the gear housing is made from protruding from his arm, which is movably mounted on the retaining rod can move along the placket, the gear housing is connected with the end of lever wrench movably, the output shaft of the gearbox is connected with the end of the lever wrench key motionless, and the hinge connecting the securing bar with lever key, located between the head of the key and gear.

Figure 1 - the first version of the device to implement the method, figure 2 is a view As in figure 1, figure 3 - the second variant of the device, figure 4 - a view B, figure 3, figure 5 is the third version of the device, figure 6 - the first version of the device market is Agam screed, 7 - the device of the first variant, the lever couplers made telescopic, Fig - strip with a U-shaped groove, figure 9 - the head of the key with the tabs.

The device of the first variant (Fig 1, 2) includes directly connected to the head 1 bolt 2 torque wrench with a head 3 having a handle or lever 4, which hinge 5 (and other elements) is connected with the lever 6, having at the end of the cut sleeve 7 that is connected with the cylinder 8 and the other bolt 9, for example, single-stage bevel gear. The end of the input shaft 11 of the reduction gear is made with the faces behind the removable handle of rotation (not shown), and on the output screw shaft 10 (screw shaft not shown) with the possibility of movement along it is installed with the internal threads of the slider 12. Last movably mounted in the guide 13, in particular, the longitudinal groove 14. The lever 6 is connected to the slider 12 in one version of the first variant of the device through a flexible rod, for example by means of a few of the links 15, which form a flexible chain.

The lever 6, the cut sleeve 7, the gear 10, the slider 12, the guide 13 and the links 15 of the chain are part of the screed designed for mechanical rotation of the head 1 bolt clockwise in the case of screwing of the bolt. With the links 15 of the chain or flexible traction device provides the necessary flexibility to work in confined us what the conditions, and also provides the ability to change the length of the device for use in bolted joints with different step bolts. In the opening of one of the links 15 of the chain is freely finger 16, which is rigidly connected with the slide 12. The finger 16 can be located in the hole of any part 15 of the flexible circuit. The device of the first variant for loosening bolts can be used without a chain made of links 15 (6). The description of this variant of the device shown in his work.

The device of the second variant (Fig 3, 4) connected to the head 1 bolt bolt connection nut lever key cylinder 3. Wrench, as in the first embodiment of the device has an arm or lever 4, the end of which the hinge 5 and the other elements of the device, which will be mentioned below, is connected with the lever 6 of the screed. The lever has at the end of the cut sleeve 7 that is connected with the cylinder 8 and the other bolt bolt connection support-rotating circle. Head 1 and 8 bolts removed from each other. The device of this variant includes another gear 10, the design of which is not disclosed in this description. The input shaft 11 of the gear on the end has a face under a removable handle rotation of the input shaft (crank not shown). Inside the housing 10 in this embodiment, the device may be made rims, C is Ceplene which is at least one gear. The output shaft 17 of the reduction gear (4) in cross section has the shape of a hexagon. With the output shaft 17 of the reduction gear by means of the hexagon connected end of the arm 4 spanner, which at the end has a hex hole for hex output shaft 17 of the reduction gear. The lever 18 of the gearbox (figure 3)made integral with the housing 10, and protruding from it, pivotally connected by a hinge 5 with the lever 6. The lever 18 may be manufactured separately from the housing 10 and is rigidly attached to the chassis. The housing 10 rests on the end of lever 4 wrench so that the lever 4 key can be freely rotated relative to the housing. In this embodiment of the device the lever 6, sleeve 7, the lever 18 of the gearbox and the gearbox 10 comprises a rod, designed for mechanical rotation of the head 1 bolt clockwise and counterclockwise arrows when screwing and unscrewing the head 1 bolt. It should be noted that in the second embodiment of the device interaxial distance between the heads 1 and 8 is equal to the center-to-center distance between the hinge 5 and the output shaft 17 of the reduction gear 10, and the center distance between the head 8 of the bolt and the hinge 5 is equal to the center-to-center distance between the head 1 and the output shaft 17 of the reduction gear 10.

Thus, the turntable tower crane mounted on the head 1 and 8 it b low levers 4 and 6, as well as the lever 18 is essentially pivotally connected through a reduction gear 10 with the lever 4, form a parallelogram or pivotally connected four-link mechanism.

The device of the third variant (figure 5) includes directly connected to the head 1 bolt bolt connection nut lever key with cylinder 3 and the lever 4, which hinge 5 (and other elements, which are described below) is connected with the lever 6 of the screed. The lever 6 has at the end of the cut sleeve 7 that is connected with the cylinder 8 and the other bolt bolt connection, which is also removed from the head 1 of the first bolt bolt connection. This unit has a gear 10, which is identical to the gear of the second variant of the device. The device according to the third variant contains the securing bar 19, the hinge 5 is associated with the lever 4 of the wrench in its middle part. Wrench head 3 mounted on the head 1 bolt bolt connection. Hinge 20 retaining strap 19 is connected with the end of the lever 6 of the screed. The housing 10 is made from protruding from the lever 21, the end of which is movably mounted on the retaining strap 19 can be moved along the strap through the holder 22, with which the end of lever 21 is connected to the axle 23. The yoke 22 is installed on a strap 19 is movable and can move freely along the placket. The levers 6, 21, the bar 19, the slider 22 and the gear 10 are part of a degree the key of the third variant of the device.

Similarly, the second variant of the device in his third option on the hexagonal shank of the output shaft 17 (4) of the gear 10 mounted end of the arm 4 spanner, which is at the end of the lever return hex hole hex output shaft 17 of the reduction gear. While the housing 10 is connected with the lever 4 so that the lever 4 can rotate freely relative to the housing 10. The hinge 5, which connects the lever 4 with the retaining strap 19 is located between the housing and the cylinder 3 lever key.

In the third embodiment of the device interaxial distance between the heads 1 and 8 is equal to the center-to-center distance between the hinges 5 and 20, and the center distance between the head 1 and the hinge 5 is equal to the center-to-center distance between the head 8 and the hinge 20.

Thus, the rotation range of a tower crane, the levers 4 and 6, mounted on the head 1 and 8 bolts and a strap 19, pivotally connected with the levers 4 and 6, form a parallelogram or pivotally connected four-link mechanism. It should be noted that the center distance between the hinge 5 and the input shaft 11 of the reduction gear 10 is less than the center-to-center distance between the axis 23 and the input shaft 11.

All versions of the device cut sleeve 7 has a cylindrical sliding surface 24, which inter is actuat with the response, the cylindrical sliding surface 25 of the lever 6. The lever 4 (figure 4) spanner interacts with the housing 10 to the plane 26 of their mutual sliding.

Figure 1 also shows the outer ring 27 of the supporting-turntable tower crane, the upper inner ring 28 and the lower inner ring 29, between which there is a lot of rollers 30. Rings 28 and 29 of the supporting-turntable fastened among themselves and with the turntable of the crane by many of the aforementioned bolt connections.

Bearing slewing rim crane other bolted connection, including many bolts 31 fixed to the frame 32 of the crane. The head 33 of the bolts 31 are located between the upper surface 34 of the outer ring 27 of the support-of the turntable and the bottom surface 35 of the turntable 36 of the valve. Head 1 and 8 bolts 2 and 9 bolted joints bearing slewing range of fastening between the upper and lower inner rings 28 and 29 of the circle and the turntable 36, located between the surface 37 of the lower ring 29 and the upper surface 38 of the frame 32 of the crane in a very confined space and confined conditions of the device.

All three devices are used together with a pair of removable elastic strips 39, in which the positions of all three variants of the device is functionally interrelated with each option device. A pair of removable spacers status is the main part of any described embodiment of the device in its operating position. In all three variants of the device (as an example) thickness of the head 3 spanner selected is greater than height of head 1 bolt so that the gasket 39 and the surface of the head 1 bolt formed gap. The thickness of the cut sleeve 7 is selected greater than the thickness of the lever 6 in the zone of rotation of the circle in such a way that between the bottom surface 37 of the support-of the turntable and the upper surface of the lever 6 in the zone of rotation of the circle formed by the gap. Figure 1 position 40 shown the finger, the connecting arm 6 with part 15 of the circuit screed device of the first variant. Figure 7 depicts the adjustable telescopic arm 6 of a rod, having a fixed part, within which its movable part. Both parts have a number of holes in the retainer 41 for fixing the telescopic arm in the working position. The latch is located in the holes 42 of the parts of the lever 6. On the cylinder, 3 keys (Fig.9) from the opposite sides of the lever 4 is made in the form of tides along with the head ledges 43.

Method of screwing and unscrewing the large bolted joints bearing slewing circle tower crane in cramped conditions is illustrated by the work of the three variants of the device to implement the method.

In conditions of heavy loads bolted connection support-rotating circle tower crane in the process of DL is positive operating connection head 1 and 8 bolts (figure 1) is firmly connected with the adjacent surfaces of the lower ring 29 and the outer ring 27 of the circle as a result of oxidation and other processes. Also as a result of these reasons strongly incorporate threads of the bolts 2 and 9 with the turns of the thread support rings of the frame 32 and the platform 36 of the valve. Strong connection of detachable parts bolted connection reaches significant size, requiring great effort and reliable device for unscrewing "stubborn" bolts and reliable tightening replaced with bolts.

In order to Unscrew the big bolt 2 is used is shown in Fig.6 device of the first variant, in which the composition of the screed is missing a flexible rod, and the lever 6 screed directly connected with the finger 16 of the slide 12.

The loosening of the bolt 2 (Fig 1) is carried out in two stages. The first stage is characterized by the force needed for moving from place head 1 bolt 2 and for subsequent unscrewing of the bolt 2, which requires a large injection gasket 39 between the head 3 of the key and the surface 38 of the frame 32 of the crane. When the gasket 39 presses the cylinder 3 keys to a surface 37 of the lower ring, which eliminates spontaneous jumping head 3 key head 1 bolt 2. Then on the head 8 of the bolt 9 bolt connection wear cut sleeve 7 of the lever 6 and the other is rokudai 39 similarly fixed on the cylinder head 8 and the other bolt lever 6 along with cut sleeve 7.

It should be noted that in order in a tight space between the surfaces 37 and 38 of the crane units for heads 1 and 8 bolts to put on, respectively, the cylinder 3 keys and cut the sleeve 7 of the lever 6, use a flat wrench and a flat lever 6 and make a first horizontal movement of the lever 4 key and lever 6 in the plane of the heads 1 and 8 bolts bolted connection, and then make them vertical movement of the heads 1 and 8.

After fixing the head 3 wrench and cut the sleeve 7 with the lever 6 pads move in the plane of arrangement of the heads 1 and 8 of the lever 6 in the direction of the lever 4 (6), then connect the lever 6 with the finger 16 of the slide 12. In this case, due to the fact that the lever 6 is installed on the cut of the sleeve 7 with the possibility of his turning, he freely rotated relative to the sleeve, which provides easy alignment of the axis of the hole at the end of the lever 6 with the axis of the finger 16 of the slide. The free rotation of the arm 6 relative to the sleeve 7 also contributes to the gap between the lever 6 and the surface 37 of the lower ring bearing slewing circle formed by the above-mentioned difference of the thicknesses of the cut sleeve 7 and the arm 6. Next, the guide 13 connecting the hinge 5 with lever 4 key.

Therefore, before operations unscrewing bolt bolt connection first connect the head of the wrench with the first Bo is that links rotation of a circle. Then connect the lever of the coupler with the second bolt bolt connection. Then connect the lever 4 key and lever 6 couplers respectively with the guide 13 ties and slider 12. To do this, move the lever 6 in the plane of the heads of the bolts 1 and 8 in a tight space between the surface 37 of the lower ring bearing slewing range (figure 1) and the surface 38 of the frame tower crane.

After all these operations, the connection parts of the device to implement the method of unscrewing and screwing of the bolts put the handle on the verge of having an input shaft 11 of the reduction gear, which rotates in the appropriate direction. When the slider 12 remains in place, and guide 13 will move in the direction of the lever 4 and create a force to rotate, directed counterclockwise. When this occurs the expansive force between the hinge 5 and the head 8 of the bolt, the distance between which and the hinge 5 is increased, and the lever 4 key will begin to rotate together with the cylinder 1 bolt counterclockwise. This will result in the moving of the head 1 and the threads of the bolt 2 with the contact surfaces and the subsequent loosening of the bolt. The described cycle of loosening the bolt 2 is repeated as long as the effort of unscrewing the lever 4 wrench will loosen the bolt 2 manually one g is eznim key without ties.

It should be noted that when moving from the turnbuckle with the location of the bolt 2 and loosening his first point is shifted downward head 1 (1) bolt 2. This move permanent fixation of the head 3 key on the cylinder head 1 bolt contributes to the elasticity of the strip 39, which due to its elasticity is precipitated down and does not impede the movement of the said head in a vertical direction by loosening the bolt 2. In another embodiment, the strip 39 (Fig), for example, U-shaped groove in it under the head 1 bolt 2, the gasket does not move down the head 1 is no impact, because in this case the cylinder 1 moves freely in the U-shaped groove of the strip.

If the cyclic operation of the device will shift down head 1 bolt relative to the head 3 of the key, the gap between the lower surface of the head 1 bolt 2 and the gasket 39, formed due to the difference of displacement in the vertical direction of the head 1 otvincivatmisa bolt. After the process of loosening the bolt 2 becomes relatively easy to perform a second stage unscrewing, for which the device is dismantled in the reverse order and loosening of the bolt 2 is conducted manually with a wrench.

The screwing of the bolt is carried out in two stages, the first of which is characterized by tightening of the bolt bruchou head 3 wrench. This stage is implemented until such time as screwing manually would be impossible due to the need of the application to the key of such a large effort, which may not provide the key.

To perform the second stage of the screw bolt 2 is used, the device of the first variant (figure 2), a coupler which comprises a flexible rod, in particular a chain made of multiple segments 15.

The operation of this device is illustrated by the following sequence of actions. After connecting the device (figure 2) with the heads 1 and 8 bolts above the image, rotate the input shaft 11 of the reduction gear 10 in the reverse direction, the links 15 of the chain tightened, and the slider 12 remains stationary guide 13 moves relative to the slider 12 toward the head 8 of the bolt 9, and the lever 4 and the head 3 of the wrench rotates clockwise. Is the rotation head 1 bolt 2 (Fig 1) and the final tightening with great effort into the thread of the platform 36 of the valve. Due to the elasticity of the strip 39 cylinder, 3 keys and head 1 bolt 2 are elastic strip 39 in mutually fixed relation to each other position. If necessary, the cycle of operation of the device of the first variant in the final tightening of the bolt 2 is repeated until the bolted connection to a certain point of rotation.

The second option ustroystva screwing and unscrewing bolts works as follows. Set on the cylinder head 1 bolt (figure 3) head 3 wrench, and cut the sleeve 7 of the lever 6 mounted on the head 8 of the second bolt bolt connection. Hereinafter, similarly, as shown in figure 1, the gasket 39 is pre-fixed with the sleeve 7 of the lever 6 and the cylinder 3 keys in the positions, and then in the hexagonal hole of the lever 4 enter the hex shank of the output shaft 17 of the reduction gear 10, the linking gear 10 with the lever 4. Then hinge 5 connect the protruding lever 18 gear with the lever 6 and then rotate the input shaft 11 of the gear in either direction, corresponding to the screwing or unscrewing of the bolt. At this point, the rotation shaft 11 is transmitted through the shaft 17 on the lever 4, and the reactive torque is transmitted to the gear housing 10. Through the lever 18, the force is transmitted to the lever 6, which is rotated around a faceted sleeve 7. This rotates the lever 4 key and the lever 6, and with them turns the cylinder, 3 keys and head 1 bolt 2. While the housing 10 and the lever 18 extinguish a jet since they don't perform rotary movements. If necessary, the cycle of the second variant of the device is repeated.

The third variant of the device (figure 5) is as follows. After installation on the heads 1 and 8 bolts bearing slewing circle heads 3 key and sleeve 7 of the lever 6 their fiksirujut the positions of the strips 39, as shown in figure 1. Rotate the input shaft 11 of the reduction gear 10 in the direction corresponding to the screwing or unscrewing of the bolt 2. At this point, the rotation shaft 11 is transmitted to the lever 4, and the reactive torque is transmitted to the gear housing 10. Then through the bar 19, the force is transmitted to the lever 6, which is rotated around a faceted sleeve 7. This rotates the lever 4 key and the lever 6, and with them turns the cylinder, 3 keys and head 1 bolt 2, with the reactive torque on the gear housing 10 is extinguished lever 21, the axis 23, the slider 22 and the strap 19. If necessary, the cycle of operation of the third variant of the device is repeated.

If in the first variant of the device, used telescopic arm 6 screed (7), pushing or shifting the sliding part of the arm 6 relative to the stationary part, install the necessary length of the lever 6 and make it so the corresponding center-to-center distance between the heads 1 and 8 of the bolt connection of the support-of the turntable. After adjustment of the length of the telescopic lever movable portion is fixed relative to the stationary part. For this purpose, holes in the fixed and movable parts of the telescopic lever insert the latch 41. After that, the telescopic arm 6 works like a regular arm, presented on Fig.6.

When tightening, atinian and the bolts connecting the lever 4 key and lever 6 screed devices have in the positions thus so they are in the process of screwing the bolt or unscrewing were always in a horizontal position in the plane of arrangement of the heads 1 and 8 of the bolt connection of the support-of the turntable of the crane.

If the efforts of the screed is not enough to tighten the bolt or unscrewing, the cylinder 3 keys (Fig.9) put a directional arrow "B" in the corresponding side kick tangent to the cylinder head 1 bolt. Appropriate shocks put on special projections 43, which is made on the cylinder and 3 keys on opposite sides of the lever 4.

Sources of information

1. EP 1162034 A2, 12.12.2001.

2. EP 0644816 B1, 16.07.1997.

3. WO 94/22642, 13.10.1994.

4. US 2655827, 11.07.1952.

5. SU 585057, 25.12.1977.

6. SU 131278, 13.09.1960.

7. EN 727413, 15.04.1980 prototype device to implement the method.

1. Way to work with large bolted connections, support and turning circle tower crane in cramped conditions, including the operation of screwing the bolt threaded connection manually by rotating the bolt head lever wrench, until the threaded connection of a certain axial force and the torque bolt mechanical coupler, and when performing the operation of unscrewing operation of loosening the bolt mechanical coupler by turning the head otvincivatmisa bolt until the threaded connection is AI a certain axial force, after which perform the operation of loosening the bolt with a wrench manually, characterized in that before the operation of tightening of the bolt or before surgery, it delays in the reverse direction of the first link key with the first bolt bolt connection support-rotating wheel, then connect the lever of the coupler with the second bolt bolt connection, fix the key and coupler from moving in the vertical direction, then the lever couplers and lever key interconnected in the plane of the heads of the bolts bearing slewing circle, and then screed reduce or increase the distance between the end of the lever wrench and second bolt bolt connection.

2. Device for large bolted connections, support and turning circle tower crane in cramped conditions, including connected with the bolt head of the bolt connection support-rotating circle tower crane wrench lever key, the end of which is pivotally connected with a coupler having at the end of the cut sleeve connected to the head of the other bolt, and a gearbox, wherein the coupler is made of a guide to set it slide, which is connected to the gearbox end of the arm coupler is installed on the cut sleeve, with the possibility of rotation of the lever of the coupler relative to the sleeve, slide, hinged to p is chhom screed or connected with him through several pivotally interconnected links.

3. Device for large bolted connections, support and turning circle tower crane in cramped conditions, including connected with one bolt head bolted connection support-rotating circle tower crane wrench lever key, the end of which is connected with a coupler having at the end of the cut sleeve connected to the head of the other bolt, and a gearbox, wherein the gearbox housing is made from protruding from his arm, pivotally connected with the end of the lever rod, and a housing connected with the end of lever wrench movably, and the output shaft of the gearbox is connected with the end of the lever wrench motionless.

4. Device for large bolted connections, support and turning circle tower crane in cramped conditions, including connected with the bolt head of the bolt connection support-rotating circle tower crane wrench lever key, the end of which is pivotally connected with a coupler having at the end of the cut sleeve connected to the head of another of the adjacent bolt, gearbox, characterized in that it comprises a retaining bar pivotally connected with lever key and the end of the lever rod, the gear housing is made from protruding from his arm, which is movably mounted on the retaining strap with a possibility of its displacement is to be placed along the placket, the gear housing is connected with the end of lever wrench movably, the output shaft of the gearbox is connected with the end of the lever wrench stationary, and a hinge connecting the securing bar with lever key, located between the head of the key and gear.



 

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Slewing circle // 2280611

FIELD: mechanical engineering.

SUBSTANCE: invention relates to slewing circles of cranes and other load-lifting machines. Proposed slewing circle consists of fixed and movable upper and lower races interconnected by bolts, and solids of revolution placed in between. Lower movable race is connected with gasket made of high-strength material installed from lower side of race. Said gasket can be sectional, with butts located in non-loaded zones and can be secured by bolts or glue.

EFFECT: increased durability of slewing circle.

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3 cl

FIELD: materials handling facilities.

SUBSTANCE: invention relates to devices for taking loose materials from pile and stowing them in layers differing in content of useful component in each layer with simultaneous averaging in process of taking material from pile and it can be used in open stores. Proposed loose material stower-gripper has boom of gripper and boom of stower of lift-lower type turnable in horizontal plane by slewing circle installed on base and drives to turn booms of gripper and stower. Slewing circle is made in form of fixed rings rigidly secured to each other and to frame of base, two coaxially arranged movable rings with gear rims resting of fixed rings through solids of revolution. Movable rings are non-connected mechanically, one movable ring being furnished with external teeth rim coupled with gripper boom turning drive, and the other is provided with internal teeth rim coupled with stower boom turning drive. Each toothed rim has independent self-contained system to regulate geometrical parameters of mating of solids of revolution with movable and fixed rings. Base be made in form of self-propelled chassis or stationary portal. Gripper boom has gripping member of rotary or scraper type.

EFFECT: reduced overall dimensions of stower-gripper, facilitated maintenance.

4 cl, 4 dwg

The invention relates to hoisting and transport machinery

The invention relates to the field of lifting and transport machinery, namely the support-rotating devices craniomandibular installations

The invention relates to hoisting and transport machinery, namely to the posts bearing slewing devices craniomandibular plants of high capacity, placed mainly on chassis vehicles

The invention relates to hoisting and transport machinery, namely the support-rotating devices crane-manipulator units of high capacity, placed mainly on chassis vehicles

The invention relates to hoisting and transport machinery, in particular to the equipment forestry machines manipulator type, and can be used, for example, in the timber industry

The invention relates to the technical equipment forestry machines manipulator type, namely the support-rotating devices, and can be used in the forest industry and forestry

The invention relates to the field of technological equipment forestry machines manipulator type, namely the support-rotating devices, and can be used in the forest industry and forestry

FIELD: mechanical engineering.

SUBSTANCE: device is made of round nut with spline and tool for tightening the nut. The spline of the nut is made of diametrically opposite recesses whose working edges oriented at an angle to each other. The tightening tool is made of wrench with working face head provided with projections parallel to its axis and forming working span for co-operation with corresponding nut recesses. The sides of the projections form an angle. The outer diameter of the housing of the wrench head at least does not exceed that of the nut.

EFFECT: enhanced convenience of operation and reliability.

2 cl, 2 dwg, 1ex

Key lockable // 2207948
The invention relates to tools for work under special conditions

The invention relates to machine elements and mechanisms, in particular to tools for turning products

The invention relates to end wrench special purpose and can be used as end hand wrench for installation bolts embedded in the holes of concrete sleepers

The invention relates to an Assembly tool

The invention relates to path tool used for tightening the nuts on the bolts holding the rail joint cover to the rails at the joints with required regulatory effort

Wrench // 2001736

FIELD: mechanical engineering.

SUBSTANCE: device is made of round nut with spline and tool for tightening the nut. The spline of the nut is made of diametrically opposite recesses whose working edges oriented at an angle to each other. The tightening tool is made of wrench with working face head provided with projections parallel to its axis and forming working span for co-operation with corresponding nut recesses. The sides of the projections form an angle. The outer diameter of the housing of the wrench head at least does not exceed that of the nut.

EFFECT: enhanced convenience of operation and reliability.

2 cl, 2 dwg, 1ex

FIELD: mechanical engineering; tower cranes.

SUBSTANCE: invention relates to means of tightening bolts or nuts of larger-size bolted joints. Method includes manual turning in and off of bolt of bolted joint by rotating bolt head by lever wrench until definite axial force appears in threaded joint with subsequent tightening of bolt by mechanical tightening member. Prior to tightening bolt or prior to its backing off, wrench is connected with first bolt of bolted joint of slewing circle, and then lever of member is connected with second bolt of bolted joint, then lever of member and lever of wrench are connected in plane of arrangement of bolt heads. Wrench and member lever are locked to prevent displacement in vertical direction, and then distance between lever of wrench and second bolt of bolted joint is decreased or increased. Invention provides three design versions of device for implementing the method.

EFFECT: provision of compact device for use in confined spaces.

5 cl, 9 dwg

Wrench // 2347673

FIELD: mechanics; tools.

SUBSTANCE: wrench for valves of household gas lines, which have head with cross section in the form of square, diagonals of which in closed and open conditions of valve are matched with longitudinal axis of gas line tube, is arranged with handle, where permanent magnet is placed for fixation of wrench on gas line tube. Wrench has open jaw arranged at value of valve head cross section square side for provision of wrench contact with valve head along three sides. Longitudinal axis of open jaw is installed at the angle of 45° to longitudinal axis.

EFFECT: higher operational reliability and safety of services systems functioning, lower expenses for wrench manufacture, provision of its reliable fastening, expansion of technological resources and assortment of items.

1 dwg

FIELD: transportation; mechanics.

SUBSTANCE: set of tools for assembly of undercar generator drive gear suspension, according to the first version, includes socket wrench for interaction with rod tailpiece and two universal tools for interaction with rod, collars and support plate. Every universal tool is arranged with protrusions for creation of spanner wrench with jaw having opposite flat surfaces (13), with cylindrical surfaces at grips ends and protrusion (10) on single cylindrical surface. According to the second version, set includes two universal tools, every of which in addition to universal tool according to the first version is arranged with protrusion (14), working facets of which create socket wrench. In process of undercar generator drive gear suspension assembly, suspension support plate is screwed or unscrewed by spanner wrench, flat facets interact with flats on medium part of wrench, and cylindrical surface and protrusion interact with cylindrical surface and deepening of rod collars.

EFFECT: inventions simplify process of assembly and disassembly.

10 cl, 5 dwg

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