KR0130894B1 - Stepless belt structure - Google Patents

Abstract

None.

Description

Endless belt structure for power transmission and manufacturing method

1 is a partial perspective view of one embodiment of the novel endless belt structure for power transmission of the present invention.

FIG. 2 is an enlarged partial cross-sectional view taken along the line 2-2 of FIG. 1, showing a state in which the belt structure is engaged with a grooved surface such as a pulley.

3 is an enlarged side view of the portion of the belt structure shown in FIGS. 1 and 2.

4 is a partial rear view showing the belt structure shown in FIG. 3 in the direction of arrows 4-4.

5 is a view similar to FIG. 1, showing another embodiment of the endless belt structure for power transmission of the present invention.

FIG. 6 is an enlarged partial cross-sectional view taken along the line 6-6 of FIG. 5, showing the state in which the belt structure is engaged with the grooved surface such as the pulley.

FIG. 7 is a partial schematic side view showing the deployed state of longitudinal gaps between the transverse grooves of the belt structure of FIG.

FIG. 8 is an enlarged side view of the belt structure of FIG. 5, showing a complete sequence of staggered arrangement patterns of longitudinal gaps between transverse grooves.

FIG. 9 is a partial rear view of the belt structure shown in FIG. 8 in the direction of arrows 9-9. FIG.

* Explanation of symbols for main parts of the drawings

20, 20A: endless belt structure 21: outer extension

22: inner pressing portion 23: support portion

24: inner surface portion 25, 27: protrusion

26, 28: home 30: pulley

30 ': surface portion

The present invention relates to a novel endless belt structure for power transmission and a method of manufacturing the same.

A plurality of longitudinal protrusions and grooves and transversely spaced and alternately spaced arrangements, with two edges, grooves such as rotatable pulleys arranged longitudinally to engage the crushed surface and alternately spaced apart It is known to provide an endless belt structure for power transmission having an inner surface consisting of a plurality of transverse protrusions and grooves.

See, for example, US Pat. No. 4,647,278 to Hull.

In addition, in order to reduce noise during normal operation of the belt structure, alternately spaced alternately one by one in the endless belt structure for power transmission, which is staggered with a difference in longitudinal gaps and / or depths of the cross grooves. It is also known to arrange away and provide protrusions and grooves.

See, for example, US Pat. No. 4,264,314 to Imamura.

It is also known to provide vehicle tires with building sealings and treads with notches having staggered depths or spacings, respectively, according to the principle of the second residual sequence based on prime number.

See, for example, the article entitled Acoustic Residues on pages 12-13 of Science News, Vol. 129, published January 4, 1986.

It is an object of the present invention to provide a novel endless belt structure for power transmission having a plurality of longitudinally arranged projections and grooves arranged alternately spaced to be driven against identically formed surfaces such as rotatable pulleys. .

In particular, in accordance with the results of the present invention, U. S. Patent No. 4,647, 278 to Hull described above transversely with a plurality of longitudinal protrusions and grooves arranged longitudinally on their inner surface and alternately spaced apart. Although a belt structure is provided in which a plurality of transverse protrusions and grooves are arranged and alternately spaced apart, the belt structure provides that the spacings between the cross grooves and the depths of the cross grooves are constant. Able to know.

Thus, in accordance with the results of the present invention, when the longitudinal gaps between the cross grooves or / or the depths of the cross grooves are staggered, the noise generated during normal operation of the belt structure coupled to the pulley by this staggered arrangement is reduced. I learned to be.

For example, as a specific embodiment of the present invention, a plurality of longitudinal protrusions and grooves, each of which is arranged in a longitudinal direction and alternately spaced apart alternately so as to engage grooves such as both edges and rotatable pulleys, respectively, and both sides A plurality of transverse projections and inner surface portions formed with grooves extending between the edges and arranged transversely and alternately spaced apart, and having longitudinal gaps or / and transverse grooves between the transverse grooves. An endless belt structure for power transmission is provided which is staggered so as to reduce noise during normal operation of the belt structure in which the depths are combined with a pulley or the like.

Accordingly, one object of the present invention is to provide a novel power transmission endless belt structure of the present invention having a variety of novel features as described above or below.

Another object of the present invention is to provide a novel power transmission endless belt structure of the present invention having various novel features as described above or below.

Other objects, uses and advantages of the present invention will become apparent from the detailed description described with reference to the accompanying drawings.

Various features of the invention are shown and described as being adapted to provide an endless belt structure for power transmission having longitudinal protrusions formed thereon on an undersurface to engage a surface portion of an identically formed structure such as a rotatable pulley. As will be appreciated, it will be appreciated that various features of the present invention may be used alone or as various composites to provide an endless belt structure for power transmission to operate in conjunction with other desired surface portions.

Accordingly, the appended drawings are only used to represent one of the wide variety of uses of the present invention, and thus the present invention is not limited only to the specific embodiments shown in the accompanying drawings.

In Figures 1 to 4, the endless belt structure 20 for power transmission of the present invention is the outer extension portion 21, the inner compression portion 22 and the outer extension portion 21 and the inner compression portion 22 And an outer extension portion 21, an inner compression portion 22, a support portion 23, etc. of the belt structure 20 are formed of a conventional material such as pulley materials. These materials and methods need not be specifically described as are known in the art because they are formed by conventional methods known in the art of manufacturing endless belt structures for electric power transmission and power transmission.

In the inner pressing portion 22 of the present belt structure 20, a plurality of longitudinal protrusions 25 arranged in the longitudinal direction, alternately spaced apart and arranged in parallel with each other through the entire endless belt length, in a manner described below. ) And grooves 26 transversely and alternately spaced apart, parallel to each other through the entire longitudinal length of the belt structure 20, between the two edges 29 of the belt structure 20. An inner surface portion 24 is defined, which is defined by a plurality of transverse protrusions 27 and grooves 28 each extending in the.

Here, the transverse protrusions 27 and the grooves 28 are arranged at right angles to the longitudinal protrusions 25 and the grooves 26, and the inner side as shown in detail in FIGS. 3 and 4. A constant pattern is formed in the surface portion 24.

As noted above, longitudinal projections and grooves, which engage a plurality of grooved surface portions, such as rotatable pulleys, from U. S. Patent No. 4,647, 278 to Hull, described above, to transmit movement between the belt structure and the pulleys; It is well known to provide an endless belt structure having protrusions and grooves arranged in the longitudinal and transverse direction with transverse protrusions and grooves that give flexibility to the belt structure, the patent of which is incorporated herein by reference. It is described for reference.

As shown in FIG. 2, the belt structure 20 of the present invention is shown as engaged with the surface portion 30 ′ of the rotatable pulley 30, which is the surface portion 30 ′ of the pulley 30. ) Includes a plurality of protrusions 31, alternately spaced apart, which engage respective grooves 26 and protrusions 25 longitudinally disposed on the inner surface portion 24 of the belt structure 20. ) And grooves 32 are formed so that the belt structure 20 and the pulley 30 with respect to each other in a manner known in the art, such as the arrangement described in detail in US Pat. No. 2,802,511 to Warp. It is designed to transmit the drive movement between them while preventing lateral movement between them.

However, in accordance with the results of the present invention, the transverse protrusions described in U. S. Patent No. 4,647, 278 to Hull described above are evenly spaced apart and composed of uniform depths throughout the longitudinal length of the belt structure. Therefore, it can be seen that in such a conventionally known belt structure, the belt structure tends to generate noise when it is engaged with the surface portion 30 'of the pulley 30.

The operating noise of the endless belt structure with the two edges engaging the angled sheave surfaces of the pulley device forms transverse protrusions and grooves arranged parallel to each other and alternately spaced apart in the belt structure. It is known from US Pat. No. 4,264,314 to Imamura, mentioned above, that the reduction in staggering the depths of the transversal grooves or / and the transverse grooves is alternate.

Thus, in accordance with the results of the present invention, the transverse grooves 28 of the belt structure 20 of the present invention are pulleys having longitudinal gaps and / or staggered depths of cross grooves between the transverse grooves. It has been found that the back reduces the noise generated in the longitudinally grooved, belt structure, which operates in engagement with the grooved surface.

In particular, the staggered relationship may be based on an acoustic phase grating generated from a square residual sequence as described in the article entitled Acoustic Residue of Science News above.

By way of example, the particular pattern, shown in FIGS. 1-4, for staggering the depths of the grooves 28, is a sequence number of the grooves 28 where n is 1,2,3,4 or the like. Squared), divided by the generating number equal to 17, and then multiplied by m by the remainder to find the depth d of the grooves in each transverse direction.

Vertically speaking, d = m · (n ² MOD 17), where m is equal to the maximum groove depth divided by the number minus one in the parent number.

Multiple m can be selected empirically so that normally the maximum groove depth is in the range of about 40% to 70% of the belt thickness to determine the cord location.

The spacing S between the adjoining transverse grooves 28 shown in FIGS. 3 and 4 is uniform, so that the deformed groove 28 can be arbitrarily engaged if desired.

The spacing S between adjacent grooves 28 may be varied arbitrarily or by a generator function or other preferred method as discussed deeply above.

Other generators may also be suitable when it is considered that the most effective reflection phase grating is based on a second order residual sequence based on prime 17.

For example, sequences based on prime sequences 17, 19 and 23 are known to be useful in reducing the noise generated in the tire industry.

Higher order generators, such as n ³ based functions, are also useful.

As described above, the surface portion of the belt structure 20 is such as to make the transverse protrusions 27 and the grooves 28 into the outer squeezes 22 using an internally ribbed curing jacket. Can be made in a way.

The grooved protective skin is then pressed into the crimp section 22 by steam and pressure in a conventional manner such as making a belted structure having a serrated bottom or serrated bottom.

See, for example, US Pat. No. 2,802,511 to Warp, supra.

The longitudinally disposed protrusions 25 and grooves 26 are then cast in this manner by a fly cutting action as fully described and claimed in US Pat. No. 2,496,269 to Hetz. And hardened belt structure.

However, the belt structures 20 and the transverse protrusions 27 and the grooves 28 of the present invention, as well as the projections 25 and the grooves 26 arranged in the longitudinal direction according to the result of the present invention, may be used in another preferred manner. Can be formed.

For example, it is contemplated that the projections 26 and the grooves 26 arranged in the longitudinal direction can be made at the same time that the transverse projections 27 and the grooves 28 are made of the outer compression 22.

It is also contemplated that the longitudinally arranged protrusions 25 and grooves 26 can be made by grinding rather than milling, if desired.

In a specific application embodiment of the belt structure 20 of the present invention, the belt structure 20 has a standard, length-arranged device as described in US Pat. No. 4,647,278 to Hull described above.

Here, however, the depths 32 (FIG. 2) of the respective longitudinal grooves 26 are about 0.95 (± 0.010) in. And the transverse distance between the pitch or the centerline of adjacent grooves 26 is about 0.140 (± 0.002). in.

The longitudinal protrusions 25 each have a substantially cast unfinished flat portion 36 and the bottom 35 of each longitudinal groove 26 has a radius of about 0.004 (± 0.002) in. Is determined.

However, due to the length of a cutting operation for creating the protrusion 25 and the groove 26 in the direction the projections 25 are substantially has a flat cutting surface (facing flat faces) of between about 40 ^o (± 2.8 ^o).

This cutting to create longitudinal projections 25 and grooves 26 also creates opposite ends 36 'of the free ends 36 of the projections 25 and each about 0.010 (± 0.002) in. Has a radius of.

In a specific embodiment of the belt structure 20 the maximum depth d of the transversely recessed grooves 28 is about 0.136 inches, so the average depth is about 0.068 inches.

To the cutting side (facing sides) of the grooves in the transverse direction in pajin adjacent maintains an angle of about 30 ^o interval (S) is a constant and approximately 0.036in..

The belt structure is about 20.808 inches in length and has four repeating sequences with a staggered depth pattern.

Another endless belt structure for power transmission of the present invention is shown by reference numeral 20A in FIGS. 5 to 9, and the same parts as the components of the belt structure 20 described above are followed by the letter A. Attached.

As shown in FIGS. 5 through 9, the belt structure 20A is alternately spaced to engage grooves 20A and protrusions 31A configured on the pulley 30A for the reasons described above. There is an inner surface portion 24A in which a plurality of protrusions 25A and grooves 26A are formed, which are arranged apart, and the inner surface portion 24A also has a belt structure that engages the pulley 30A for the reasons described above. Multiple projections 27 arranged transversely and alternately spaced apart, with the spacings 25A between the adjacent grooves 28A arranged staggered so as to reduce noise generated during normal operation of 20A. ) And grooves 28 are formed.

In fact, the matrix forming the transverse protrusions 27A and the grooves 28A in one application embodiment of the belt structure 20A of the present invention is angled in the same manner as in US Pat. No. 4,264,314 to Imamura described above. It is based on a matrix that has been used in the past to form transverse grooves and protrusions in the inner surface portion of an endless belt structure driven through binary side edges.

In particular, in FIG. 7, five different transverse protrusions 27A for the belt structure 20A are defined, as defined by lines A, B, C, D, and E, respectively. It can be seen that it is formed from having adjacent transverse grooves 28A spaced apart by the gaps 40, 41, 42, 43 and 44.

In arranging the gaps 40-44, a generally irregularly arranged gap SA arrangement may comprise a sequence of 34 gaps AE with the belt structure 20A, followed by a belt structure ( Repeat the sequence of intervals from end to end through the entire longitudinal direction of 20A).

In one application embodiment of the belt structure 20A, each sequence is in the following order:

AECCDBCBDCEABBCADCEBADDBECBEADCBDC.

In this application embodiment of the belt structure 20A of the present invention, the lengths of the gaps 40-44 are 0.250 in., 0.281 in., 0.313 in., 0.344 in., 0.375 in., Respectively. The average depth T of the transverse grooves 28A is about 0.105 in. And the radiuses R2 and R3 shown in FIG. 7 are each about 0.045 in.

The application embodiment of the present belt structure 20A has the dimensions of the longitudinal projections 25A and the grooves 26A formed in the same manner as the projections 25 and the grooves 26 as described above, and repeats. The letter A will be used to designate the same numbers as those in FIG.

However, although certain special dimensions have been used for the belt structures 20 and 20A, this is merely an embodiment and is not outside the claims of the present invention.

Accordingly, it can be seen that the present invention not only provides a novel endless belt structure for power transmission, but also provides a novel method of manufacturing the endless belt structure for power transmission.

As the form and manufacturing methods of the present invention are shown and described through the preferred embodiments, it will be understood that various other forms and methods may be used without departing from the scope of the present invention.

Claims (20)

The lateral edges are opposed to each other, and the inner surface is formed with a plurality of protrusions and grooves which are in engagement with the ribbed surface of the rotatable pulley and are arranged longitudinally alternately apart at regular intervals and between the lateral edges. An endless belt structure for power transmission consisting of a plurality of protrusions and grooves formed in a transverse direction alternately spaced apart at regular intervals, each extending toward one side, the longitudinal direction between the transverse grooves And the spacing is staggered to reduce noise during normal operation of the endless belt structure with the pulley. The endless belt structure according to claim 1, wherein the longitudinal spacing between the transverse grooves is irregularly staggered. 3. The endless belt structure of claim 2 wherein the average length of the spacing is between 0.3 inches and 0.4 inches. 4. The endless belt structure of claim 3, wherein the average length of the spacing is 0.313 inches. 5. The method of claim 4, wherein the spacing comprises five different lengths arranged in an irregular sequence or a predetermined number of the five different lengths, wherein the sequence is in the longitudinal direction of the endless belt structure. Endless belt structure, characterized in that it is repeated over the entire length of the structure. The endless belt structure according to claim 1, wherein the length of the groove in the lateral direction is uniform. 7. The endless belt structure of claim 6, wherein the depth of the groove is about 0.105 inches. The endless belt structure according to claim 1, wherein the depths of the grooves are staggered. 9. The endless belt structure according to claim 8, wherein the depths of the grooves are irregularly staggered. 10. The method of claim 9, wherein the depths of the grooves are staggered in a sequence calculated from a general formula using established parental numbers, the sequence being repeated over the entire length of the structure in the longitudinal direction of the endless belt structure. Endless belt structure. 11. The method of claim 10, wherein the depths of the transverse grooves in each sequence are staggered based on the second order residual sequence based on the established parental number, for each transverse groove in each sequence. The depth is determined by obtaining the phase of the square of the sequence number divided by the parent number and then multiplying the remainder of the integer by m (where m is the required depth divided by mother number -1). Structure. 12. The endless belt structure according to claim 11, wherein the expanded mother number is a prime number other than one. The lateral edges are opposed to each other, and the inner surface is formed with a plurality of protrusions and grooves which are in engagement with the ribbed surface of the rotatable pulley and are alternately spaced apart at regular intervals and arranged longitudinally and between the lateral edges. In the endless belt structure for power transmission comprising a plurality of protrusions and grooves formed in the transverse direction alternately spaced apart at regular intervals, each extending toward a side, the depth of the grooves in the transverse direction being equal to the endless belt. An endless belt structure, characterized in that the structure is staggered to reduce noise during normal operation with the pulley. The endless belt structure according to claim 13, wherein the depths of the grooves are irregularly staggered. 15. The endless belt structure of claim 14, wherein the depths of the grooves are staggered in a fixed number of irregular sequences and the sequence is repeated over the entire length of the structure in the longitudinal direction of the endless belt structure. 16. The depth of the transverse grooves in each sequence are staggered based on the minority residual quadratic sequence, wherein the depth for each transverse groove in each sequence is An endless belt structure, characterized in that determined by multiplying the square of the sequence number of a particular transverse groove divided by a prime number by the remainder of the maximum desired depth minus the prime number. 17. The endless belt structure according to claim 16, wherein the determined prime number is 17. 17. The endless belt structure according to claim 16, wherein the longitudinal spacing between the transverse grooves is staggered. The lateral edges are opposed to each other, and the inner surface is formed with a plurality of protrusions and grooves which are in engagement with the ribbed surface of the rotatable pulley and are alternately spaced apart at regular intervals and arranged longitudinally and between the lateral edges. In the method for producing a power transmission endless belt structure consisting of a plurality of protrusions and grooves are arranged in the transverse direction alternately spaced apart at regular intervals extending toward each other, the endless belt structure is a pulley and Staggering longitudinally spacing between said transverse grooves to reduce noise during normal operation. The lateral edges are opposed to each other, and the inner surface is formed with a plurality of protrusions and grooves which are in engagement with the ribbed surface of the rotatable pulley and are arranged longitudinally alternately apart at regular intervals and between the lateral edges. A method of manufacturing an endless belt structure for power transmission comprising a plurality of protrusions and grooves each extending laterally and alternately spaced apart at regular intervals, wherein the mudan or belt structure is pulleys. And staggering the depths of the transverse grooves so as to reduce the noise during normal operation.

Images