The transmission device movement (options)

 

(57) Abstract:

The invention relates to a device, to ensure the normal operation of machinery. The device comprises a pair of identical flexible cylindrical rings 1, a flexible curved spokes 2, hard wheels 3, one of which is driven, and a flexible transmission element 4. Ring 1 provided with annular grooves. Spokes 2 asymmetrically mounted on wheels 3. The offset of the wheel 3 relative to each other flexible ring 1 is pressed against the element 4 so that the area of the contact surfaces of the ring grooves form a straight through channel along the axis of which is movably mounted a flexible element 4. A variant of the device that contains single and dual rollers, one of which is driven. The invention is aimed at reducing the rate of destruction of the surface layer of the flexible element. 2 C. and 8 C.p. f-crystals, 3 ill.

The invention relates to the field of mechanical transmission of motion, and more particularly to the transmission of rectilinear movement of the flexible element.

To transmit the rotational motion of the actuator in a continuous rectilinear motion of the flexible link of machines or mechanisms, in practice, the widely ispolzuyutsya machines. M: mechanical engineering, 1988), for example, in machines for cutting solid materials using a diamond rope or diamond wire (Burr N. , And other Equipment for the production of coating materials from natural stone. M: Mechanical Engineering, 1988).

The disadvantages of these devices are the need to create a pre-tension of the flexible transmission element and the bend in the zone transfer traffic. The value of the effort pre-tension commensurate with the force created by the transmitted power and voltage due to the action of these efforts, inversely proportional to the cross-sectional area of the flexible transmission element. Stress resulting from bending of the flexible element on the driven wheels transmission is proportional to the thickness of the cross-section of the flexible element to the diameter of the driving wheels. Therefore, increasing transmit power leads to an increase of the cross-section of the flexible element, the strength of the resources in which the same type of gears are used inefficiently, and an excessive increase in the diameter of the driving wheels. Device with a flexible element for the transmission of relatively large capacity due to the large diameter driving wheels are large actionee transfer (Iosilevich, B. machine Parts. M: mechanical engineering, 1988) operate in the presence of high contact pressure in the local area of the flexible transmission element, which leads to accelerated destruction of the surface layer, and then and only flexible transmission element. To use these devices for the transmission of motion to the flexible element with a variable length cross-section is practically impossible.

The present invention is the task of creating a device with a flexible transmission element movement with such a design implementation, which would eliminate the above disadvantages. This problem is solved by creating a device with a flexible transmission element movement, containing at least one pair provided with annular grooves identical flexible cylindrical rings with flexible curved spokes asymmetrically mounted on a rigid wheels, at least one of which is driven, and a flexible transmission element. Offset one hard axis of the wheel relative to the other wheel, a flexible ring is pressed so that the area of the contact surfaces of the ring grooves with a flexible transmission element, the annular grooves form a straight-through channel, the cat is bcih curved spokes in the proposed device allows for the transmission of motion to the flexible transmission element to perform the entire length of the straight-through channel, the length of which is determined by the value of the mutual offset of the hard wheels and depends on the amount of hardness flexible rings and a flexible curved spokes, and the relationship of their rigidity. The strength of the contact pressure exerted by the flexible rings on the transmission element of motion required to perform the transfer movement of the corresponding power is distributed along the length of the zone straight-through channel, which significantly reduces the value of the maximum contact stresses acting on a flexible transmission element, and reduces the dynamic effects arising during operation of the device. The angularity of flexible spokes not only reduces their Flexural rigidity and thereby smoothes the dynamic loads in the zone transfer traffic, but also creates the opportunity to increase transmit power of movement with increasing angular velocity of rotation of the drive wheel due to the growth of the centrifugal forces acting in the area of the straight-through channel by flexible rings on the flexible transmission element. To ensure rectilinear shape of the through channel of the flexible ring on the hard wheels attached asymmetrically. This eliminates the possibility of occurrence of yshybny is oiste using mutually balanced contact pressure, the acting from the side of the flexible rings on the flexible transmission element, avoids the necessity of creating a pre-tension of the flexible element. As a result, significantly reduces the stresses acting in the flexible transmission element, which allows not only to use more thin flexible transmission elements, but also outside the working tension, to use discrete guide apparatus, the individual elements which can have a substantially small radius of curvature. Flexible transmission element will be bent by the envelope of discrete elements that will significantly reduce the dimensions of the device.

Pets that curved spokes had the form of a flexible annular cylinders closed profile, filled with pressurized gas or fluid and installed on the hard wheels for external cylindrical surface which is fixed a flexible ring provided with annular grooves. This design will allow, by changing the pressure in the cylinders, to ensure the necessary contact pressure to the flexible transmission element of motion required for transmission of different capacities in the same device. Nanoha through channel, and oscillations of flexible rings will decrease significantly. The change in stiffness (pressure) cylinders allows a wide range to adjust the distribution of the contact pressure to the flexible transmission element along the length of the straight-through channel that you want to transmit with a flexible element having periodically speed changing section, for example a diamond rope.

The choice of forms and sizes are curved spokes, as well as the geometric dimensions of the flexible rings allows you to set necessary to transmit the motion of a given power, the length of the straight-through channel.

When carrying out the transmission of motion is relatively small capacity is convenient to use the device, a flexible curved spokes is made of an elastic material with a low modulus of elasticity, such as rubber. Brand materials and geometrical dimensions of the flexible spokes and rings are selected from a length of straight through-channel is needed to transmit the motion of the specified capacity.

It is possible that the device flexible curved spokes were installed discretely. This will allow straight-through channel is ideal weakly varying along the length of the through-channel periodic functions, the frequency of which is determined by the number of spokes and the angular velocity of rotation of the flexible rings, curved needles are antisymmetric with respect to the median axis of the flexible rings. This configuration will allow transmission in which it is necessary to use flexible element periodically unchanging cross-section, such as diamond wire.

Installing curved spokes antisymmetrize with respect to the median axis of the flexible rings can be obtained asymmetric relative to the line connecting the geometric centers of flexible rings, the distribution of the contact pressure in the area of the straight-through channel. This will allow for unilateral smooth operation of the device.

For symmetrical installation of curved spokes contact pressure is distributed symmetrically, which allows the transmission of movement to carry out in both directions.

For damping oscillations that may occur in the device when using flexible element of variable cross-sectional surface of the curved spokes can be equipped with a cover for damping of elastic waves, for example a thin layer of lead.

To ensure the La some of mechanisms and machines, for example for lifting machines, it is necessary to ensure the formation of relatively long end-to-end channel, asymmetrically located with respect to an axis connecting the geometric centers of the flexible ring pair. In such cases it is advisable to use another design of the invention in which the flexible spokes and hard wheels are replaced by anchor-driving apparatus mounted symmetrically with respect to the straight-through channel and consisting of at least four pairs and two single friction rollers, at least one pair of which is driven, and one roller of each pair and all of the individual rollers are provided with guide grooves for flexible rings. The device in this design allows changing the location of the roller pairs, in a wide range to adjust the distribution of the contact pressure to the flexible transmission element along the length of the straight-through channel that will allow transmission with a flexible element having periodically stepped cross-section, for example a diamond rope.

Appropriate, to improve the transmission of motion, at least one of the flexible rings, the surface of the ring p is 2">

For the transmission of relatively large capacity, convenient to use complex devices, which consists of, sequentially installed relative to the flexible element, device motion, drive wheels which are sinhronizovano rotational movement.

Specified constructive implementation allows the transmission of motion, using as a flexible transmission element movement elements with a relatively small thickness and a variable length cross-section. This significantly reduced the dimensions of the transmission device movement without compromising its performance.

To understand the above schematic image transmission device:

Fig. 1 schematically depicts a device for transmitting motion, made according to the invention;

Fig. 2 schematically depicts a variant of the device with spokes having the form of a closed annular cylinders;

Fig. 3 schematically depicts a device for transmitting motion, made under the second paragraph of the invention.

The proposed transmission device movement comprises a pair of identical flexible ring 1 (Fig. 1), which by means of a flexible capopiranha section which has the shape of part of the cross-section of the flexible transmission element 4. Hard wheels 3 mounted on the shafts so that the longitudinal geometric axis of the ring grooves 5 flexible rings 1 are located in the same plane, and the shaft of the driven wheel with bearings (in the drawing not shown) may be shifted in the plane passing through the geometrical axis of shaft hard wheels 3. Between the flexible rings 1, in place of their possible contact is established flexible transmission element 4 and the displacement of the supports 7 of the driven wheel to the drive wheel, pressed flexible ring 1 formed from offset through the straight channel 6.

In Fig. 2 shows a schematic of the proposed device with a continuous curved spokes when they are in the form of a closed toroidal ring 10. Closed toroidal rings 10 are mounted on a rigid wheels 3 and fasten the flange of the cap 12. The outer cylindrical surfaces of the toroidal ring 10 having annular depressions symmetrically installed flexible ring 1 and toroidal ring 10 under the pressure of the filled gas or liquid. The pressure in the toroidal rings 10 should ensure needed to transmit the power, grip the spokes with hard wheels and with flexible rings is fast and adjustably secured by means of a single roller 9 and roller pairs 8. The rollers mounted on the perimeter of the flexible rings 1 on a separate support plates 13, one of which can move relative to the other. Base plate 13 is fixed on the device (in the drawing not shown) so that the annular grooves 5 flexible rings 1 are located in the same plane. Shifting one base plate 13 relative to another creates a straight-through channel, in which pre-installed flexible transmission element 4.

The transfer device and the motion is as follows.

The offset of the geometric axis of one of the flexible ring 1 relative to the other to provide a complete seal surfaces of the annular grooves 5 flexible rings 1 with the surface of the flexible transmission element 4. After achieving the necessary contact pressure on the flexible element 4, by means of a drive roller 9 or hard wheels 3 flexible ring (s) 1 report of the rotational movement. Flexible transmission element 4 moves rectilinearly between the flexible wheels.

The present invention can be used when converting the rotational motion into rectilinear motion of the flexible link of machines and mechanisms, for example in machines for cutting hard materials when s is high motion in straight line, including at least one pair, provided with annular grooves 5 identical flexible cylindrical rings 1, which by means of a flexible curved spokes 2 asymmetrically mounted on a rigid wheels 3, at least one of which is driven, and a flexible transmission element 4, characterized in that the flexible ring 1 is installed and the offset of the axis of one ring 1 relative to the other pressed so that the area of the contact surfaces of the ring grooves 5 with a flexible transmission element 4 ring grooves 5 formed straight through the channel 6, which coaxially with the axis of the channel is mounted elastically flexible transmission element 4.

2. The device under item 1, characterized in that the flexible cylindrical ring 1 mounted on a rigid wheels 3 by means of flexible spokes having the form of annular cylinders closed profile 10 filled with pressurized gas or liquid.

3. The device under item 1, characterized in that the flexible curved spokes 2 and the flexible ring 1 is made of elastic material with a low modulus of elasticity.

4. The device under item 1, characterized in that the flexible curved spokes 2 installed discretely and are antisymmetric relative diametral is Owlery discretely and are located symmetrically with respect to the median axis of the flexible rings 1.

6. The device under item 1, characterized in that at least part of the surface of the curved spokes 2 are equipped with a coating for damping of elastic waves.

7. The device under item 1, characterized in that the flexible ring 1 is fixed on the hard disks 3 with an interference fit through pre-curved elastically deformed spokes 2.

8. The device under item 1, characterized in that at least one of the flexible rings 1 the surface of the annular groove is equipped with a friction coating.

9. The transfer device and the movement for converting rotary motion into rectilinear, including at least one pair provided with annular grooves 5 identical flexible cylindrical rings 1, which is movably fixed by the alignment apparatus comprising arranged symmetrically about the axis, equidistant from the geometric centers of flexible rings, single 9 and 8 paired friction rollers, at least one of which is driven, and flexible transmission element 4, characterized in that the displacement of one guide vane relative to another flexible ring 1 is pressed so that at the site of contact surfaces of the ring grooves 5 with flexible elements stored is secured a flexible transmission element 4.

10. The device according to p. 9, characterized in that at least one of the flexible rings 1 the surface of the annular groove is equipped with a friction coating.

 

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