阅读说明：本技术 无级变速带测量工具 (Stepless speed change belt measuring tool ) 是由 王增宝 郁振宇 闫军 庄海艳 于 2021-02-08 设计创作，主要内容包括：本发明提供一种无级变速带测量工具,包括基座,位于基座上的一对夹持块,该对夹持块具有彼此面对的夹持面,夹持面为倾斜面,两个夹持面可相对远离或靠近,与基座上的基面形成一个梯形空间用于分别支撑所要测量的无级变速带的两个侧面与顶面,及位于左、右夹持块上的左、右测量块,左、右测量块均具有测量部,测量部为无级变速带的线绳中心与左、右夹持面的交线沿垂直于基面延伸形成的面,采用该测量工具在不破坏无级变速带的情况下,可快速、准确的测量出无级变速带的节线宽度。(The invention provides a stepless speed change belt measuring tool, which comprises a base, a pair of clamping blocks positioned on the base, a left measuring block and a right measuring block, wherein the clamping blocks are provided with clamping surfaces which face each other, the clamping surfaces are inclined surfaces, the two clamping surfaces can be relatively far away or close to each other, a trapezoidal space is formed by the clamping blocks and a base surface on the base and is used for respectively supporting two side surfaces and a top surface of a stepless speed change belt to be measured, the left measuring block and the right measuring block are positioned on the left clamping block and the right clamping block, the left measuring block and the right measuring block are both provided with measuring parts, and the measuring parts are surfaces formed by extending the intersection lines of the centers of cords of the stepless speed change belt and the left clamping surface and the right clamping surface along the direction vertical to the base surface.)

1. The stepless speed change belt measuring tool is characterized by comprising a base, a pair of clamping blocks positioned on the base, a left measuring block and a right measuring block, wherein the clamping blocks are provided with two clamping surfaces which face each other, the clamping surfaces are inclined surfaces, the two clamping surfaces can be relatively far away or close to each other, a trapezoidal space is formed by the clamping blocks and a base surface on the base and is used for respectively supporting the side surface and the top surface of a measured stepless speed change belt, the left measuring block and the right measuring block are respectively positioned on the upper parts of the two clamping blocks and are respectively provided with a measuring part, and the measuring part is a surface formed by upwards extending the intersection line of the center of a cord of the stepless speed change belt and the clamping surfaces along the direction perpendicular to the base surface.

2. The infinitely variable speed belt measurement tool of claim 1, wherein the pair of clamping blocks is a fixed clamping block and a movable clamping block.

3. The infinitely variable speed belt measurement tool of claim 2, wherein the fixed clamping block is fixed to the base by a bolt.

4. The infinitely variable speed belt measurement tool of claim 3, wherein the base is provided with a slide along which the moving clamp block moves back and forth relative to the fixed clamp block.

5. The infinitely variable speed belt measuring tool of claim 4, further comprising a clamping device, the clamping device comprising a fixed bracket fixed to the base and a ram having one end connected to the movable clamping block and the other end movably supported on the fixed bracket through a hole in the fixed bracket, the clamping device further comprising a spring through which the ram passes, the spring being located between the fixed bracket and the movable clamping block, the spring applying a force to the movable clamping block to cause the movable clamping block to have a tendency to move in a direction toward the fixed clamping block.

6. The infinitely variable speed belt measuring tool of claim 5, further comprising a clamping device offset from the clamping block along the length of the belt, the clamping device comprising a bracket mounted to the base and a strut movable in a direction perpendicular to the base, the strut having one end connected to the clamping block and the other end movably supported on the bracket relative to the bracket through an aperture in the bracket, and a spring between the clamping block and the bracket, the strut passing through the spring, the spring applying a force to the clamping block tending to move the clamping block toward the base.

7. The infinitely variable speed belt measuring tool of claim 5, further comprising a clamping device disposed at a distance from the clamping block along the length of the belt, the clamping device comprising a bracket mounted to the base and a lever movable in a direction perpendicular to the base, one end of the lever being rotatably connected to the press block, the other end of the lever being mounted to the bracket via a nut, and a pair of guide rods disposed on either side of the lever parallel to the lever, one end of the guide rod being connected to the press block, the other end of the guide rod being movably supported by the bracket and a spring disposed between the guide rod and the bracket, the guide rod passing through the spring, the spring applying a force to the press block to cause the press block to have a tendency to move toward the base.

8. The infinitely variable belt measuring tool of claim 6 or 7, further comprising a locating block located near the position of the hold-down device, the locating surface on the locating block being in the same plane as the clamping surface.

9. The infinitely variable speed belt measurement tool of claim 1, wherein the measurement block is part of the clamping block.

10. The infinitely variable speed belt measurement tool of claim 1, wherein the measurement block is a part mounted to the clamping block.

Technical Field

The present invention relates to a continuously variable transmission belt measuring tool.

Background

The length of a circle of the belt corresponding to the center position of the cord is called the pitch length of the belt, the width of the belt corresponding to the center position of the cord is called the pitch width, the ratio of the pitch length to the pitch width is an important parameter for controlling the speed ratio, the acceleration, the climbing and the like, and the material near the pitch width position of the belt provides most of load in the transmission process and reflects the wear capacity of the belt, so the pitch width of the belt is an important parameter of a stepless speed change belt, particularly a high-power stepless speed change product.

At present, no suitable tool on the market can accurately measure the pitch line width of the belt on the basis of not damaging the stepless speed change belt. The general method is to cut the stepless speed change belt into a V-shaped section and directly detect the V-shaped section by a caliper, and the measured data is extremely inaccurate because the center of the wire rope is difficult to locate during measurement. However, in most cases it is desirable to test the pitch line width without damaging the product for determining if the tape is acceptable.

Therefore, it is urgently needed to provide a measuring tool which does not damage the structure of the stepless speed change belt during testing and can quickly and accurately measure the pitch line width of the belt.

Disclosure of Invention

The stepless speed change belt is a special V-shaped belt, which is provided with a top part, a bottom part and a cord arranged between the top part and the bottom part, two side surfaces of the belt incline from the top part to the bottom part according to a fixed angle, the width of the top part is larger than that of the bottom part, furthermore, the extending surfaces of the two side surfaces can form a V-shaped included angle, and the section of the belt is approximately in an isosceles trapezoid structure. The included angle of the two side surfaces can be any angle between 27 degrees and 33 degrees according to requirements, and the distance between the center of the thread rope of each type of belt and the top surface of the top part is theoretically fixed and unchanged based on the design theory and the production mode of the stepless speed change belt. Based on this, the present invention provides a stepless speed change belt measuring tool for solving the above technical problems, comprising:

the device comprises a base, a pair of clamping blocks positioned on the base, a left measuring block and a right measuring block, wherein the clamping blocks are provided with two clamping surfaces facing each other, the clamping surfaces are inclined surfaces, the two clamping surfaces can be relatively far away or close to each other, a trapezoidal space is formed by the clamping blocks and a base surface on the base and used for respectively supporting the side surface and the top surface of a measured stepless speed change belt, the device also comprises the left measuring block and the right measuring block, the left measuring block and the right measuring block are respectively positioned at the upper parts of the two clamping blocks and are respectively provided with a measuring part, and the measuring parts are surfaces formed by upwards extending the intersection line of the center of a cord of the stepless speed change belt.

The pair of clamping blocks is a fixed clamping block and a movable clamping block.

The fixed clamping block is fixed on the base through a bolt.

The base is provided with a sliding device, and the movable clamping block moves back and forth relative to the fixed clamping block along the sliding device.

The clamping device comprises a fixed support fixed on the base and an ejector rod with one end connected to the movable clamping block, the other end of the ejector rod is movably supported on the fixed support through a hole in the fixed support, the ejector rod penetrates through the spring, the spring is located between the fixed support and the movable clamping block, and the spring applies force to the movable clamping block to enable the movable clamping block to have the trend of moving towards the direction of the fixed clamping block.

The clamping device comprises a support arranged on the base and a pressing rod capable of moving in the direction perpendicular to the base, one end of the pressing rod is connected with the pressing block, the other end of the pressing rod is movably supported on the support through a hole in the support, the spring is positioned between the pressing block and the support, the pressing rod penetrates through the spring, and the spring applies force to the pressing block to enable the pressing block to have the tendency of moving towards the base surface.

The clamping device comprises a support arranged on the base and a pressing rod capable of moving in the direction perpendicular to the base, one end of the pressing rod is rotatably connected to the pressing block, the other end of the pressing rod is arranged on the support through a nut, the clamping device further comprises a pair of guide rods parallel to the pressing rod and located on two sides of the pressing rod, one end of each guide rod is connected with the pressing block, the other end of each guide rod is movably supported on the support and is located on a spring between the guide rod and the support, the guide rods penetrate through the springs, and the springs apply force to the pressing block to enable the pressing block to have the tendency of moving towards the base surface.

The clamping device further comprises a positioning block located near the position of the pressing device, and a positioning surface on the positioning block and the clamping surface are located in the same plane.

The measuring block is part of the clamping block.

The measuring block is a part mounted on the holding block.

By adopting the measuring tool, the pitch line width of the stepless speed change belt can be rapidly measured on the basis of not damaging the stepless speed change belt, and whether the stepless speed change belt meets the production standard or not can be accurately judged.

Drawings

FIG. 1, a partial cross-sectional view of a measurement tool;

FIG. 2 is a partial cross-sectional view of another embodiment measurement tool;

fig. 3, a partial cross-sectional view of a compression device.

1, a base; 2, a left clamping block; 3, a right clamping block; 4, a left clamping surface; 5, a right clamping surface; 6, a left measuring block; 7, a right measuring block; 8, a left measuring part; 9, a right measuring part; 10, a base surface; 11, a bolt; 12, a top rod; 13, a hole; 14. fixing a bracket; 15. 25, a spring; 17. a caliper; 18. a continuously variable transmission belt; 24, a bracket; 26, briquetting; 31. a guide bar; 32. and (5) positioning the blocks.

Detailed Description

As shown in fig. 1, the continuously variable transmission belt measuring tool includes a base 1, two clamping blocks such as a left clamping block 2 and a right clamping block 3 facing each other on the base 1, the left clamping block 2 and the right clamping block 3 having facing clamping surfaces, the two clamping surfaces being inclined surfaces such as a left clamping surface 4 and a right clamping surface 5. The included angle formed by the two inclined surfaces is the same as the included angle of the two side surfaces of the tested stepless speed change belt in a straight state, and if the included angle of the two side surfaces of the belt in the straight state is 29 degrees, the included angle formed by the extension of the left clamping surface 4 and the right clamping surface 5 is 29 degrees. The base 1 is provided with a base surface 10, a trapezoidal space is formed by the left clamping surface 4 on the left clamping block 2, the base surface 10 on the base 1 and the right clamping surface 5 on the right clamping block 3, and a stepless speed change belt 18 needing to be measured can be placed in the trapezoidal space. The left clamping block 2 and the right clamping block 3 can be relatively far away from and close to each other left and right on the base 1, enough space is left after the distance, the stepless speed change belt 18 is placed, and two side surfaces of the stepless speed change belt 18 can be tightened when the stepless speed change belt is close to the base. The upper parts of the clamping blocks are also respectively provided with a measuring block, if a left measuring block 6 is arranged on the left clamping block 2, and a right measuring block 7 is arranged on the right clamping block 3. Each measuring block is provided with a measuring part, such as a left measuring part 8 on the left measuring block 6 and a right measuring part 9 on the right measuring block 7. The left and right measuring parts are formed by extending the intersection line of the center of the cord of the continuously variable transmission belt and the left and right holding surfaces 4 and 5 upward along the vertical base 10, and since the theoretical value of the distance from the center of the cord of each belt to the belt top surface is fixed, the intersection line of the base 10 at the fixed distance upward from the holding surface is the center position of the cord, and the intersection line extends upward along the vertical base 10 to form the measuring part, the distance between the two measuring parts is theoretically equal to the width of both sides of the center position of the cord of the continuously variable transmission belt, and since the distance between the two measuring parts is equal to the pitch line width of the continuously variable transmission belt, the distance between the two measuring parts is the pitch line width of the continuously variable transmission belt 18 when the holding surface completely holds the side surface of the belt.

During measurement, the stepless speed change belt is placed on the base surface 10, the stepless speed change belt 18 at the measurement part is straightened to enable the belt top surface of the measurement section to be tightly attached to the base surface 10, then the left clamping surface 4 and the right clamping surface 5 are mutually close to each other, the left clamping surface 4 and the right clamping surface 5 are respectively and completely attached to the two side surfaces of the stepless speed change belt 18, and the belt is positioned and kept clamped. The pitch line width of the cord can be determined by measuring the distance between the two measuring parts with the caliper 17, so that whether the width of the belt meets the standard can be measured without damaging the structure of the belt.

The measuring block may be part of the clamping block or may be a part mounted to the clamping block. The measuring part can be two back surfaces on the measuring block shown in fig. 1, and the two back surfaces are clamped by calipers 17 as shown in fig. 2; the measuring part may be two opposite surfaces, for example, a plane extending upward along the vertical base 10 from the intersection line of the theoretical cord center position of the left clamping block 2 and the right clamping block 3 and the clamping surface, and the lowest position of the measuring part may preferably be higher than the height of the belt, and the distance between the two opposite measuring parts may be measured by the caliper inner diameter measuring jaw.

For the convenience of operation and placement of the belt, the two clamping blocks can be arranged into a movable clamping block and a fixed clamping block, if the right clamping block 3 can be fixed on the base 1 by using the bolt 11 as the fixed clamping block, the other left clamping block 2 is the movable clamping block, and the left clamping block 2 can move back and forth relative to the right clamping block 3 on the sliding device. The sliding device is fixedly mounted on the base 1, such as a sliding rail or a sliding chute, which is more conveniently a sliding chute, the sliding chute can be formed by a base plate fixed on the base 1 at the front side and the rear side, and the surface of the base plate is a base surface 10. The slide means may also be part of a recess machined in the middle of the base 1, the base surface being the base surface 10. The left clamping block 2 slides left and right in the sliding groove relative to the right clamping block 3.

Preferably, as shown in fig. 2, in order to facilitate the clamping of the left clamping block 2 to the right clamping block 3, a clamping device is further arranged on the base 1, and the clamping device comprises a mandril 12, a fixed bracket 14 and a spring 15. The fixing bracket 14 is fixed on the base 1, and a hole 13 through which the top rod 12 can pass is arranged on the fixing bracket 14 and is used for supporting one end of the top rod 12 for suspension. The other end of ejector rod 12 is connected in mobilizable left grip block 2, and spring 15 is arranged in between mobilizable left grip block 2 and the fixed bolster 14, and ejector rod 12 passes inside being used for supporting spring 15 of spring 15, and spring 15 exerts the force to removing the grip block all the time, makes to remove the grip block have the trend to fixed grip block direction motion, and ejector rod 12 drives left grip block 2 and slides about right relative to right grip block 3 in the spout.

Because the stepless speed change belt 18 is of an annular structure, the flatness of the belt at the measuring part needs to be kept during measurement, and in order to reduce the auxiliary pressing of hands, a pressing device is further arranged at a position of the base 1 which deviates a certain distance from the left clamping block 2 and the right clamping block 3 along the length direction of the belt and is separated from the clamping blocks. To reduce the measurement tool oversize, it is preferably within 10 bandwidth of the gripping block. The hold-down device may be provided in the same manner as the clamping device, including the bracket 24, the pressure piece 26, the spring 25 and the pressure rod (not shown). One end of the bracket 24 is fixed on the base 1, and the other end is suspended above the base 1 to form an L shape. The pressing rod can move along the direction vertical to the base 1, one end of the pressing rod is connected to the pressing block 26, the other end of the pressing rod is supported on the support 24 through a through hole in the support, the through hole is vertical to the base, and the pressing block 26 can be driven to move together relative to the support 24 along the direction vertical to the base 1 so as to press the stepless speed change belt 18. A spring 25 is vertically disposed between the mass 26 and the suspended end of the bracket 24, and a strut passes through the spring 25, the spring 25 applying a force to the mass tending to move the mass toward the base 10. The same structure and principle as the clamping device can be adopted.

Alternatively, since the hold-down device is to prevent the ribbon from curling in the lengthwise direction, it is preferable that the pressing piece 26 be as large as possible in the lengthwise direction of the ribbon. In order to keep the pressure of the pressing block 26 balanced in the length direction, a pair of guide rods 31 and springs 25 are arranged on two sides of the pressing rod of the pressing block 26 in the length direction of the belt and parallel to the pressing rod, the springs 25 are located between the pressing block 26 and the bracket 24, the guide rods 31 penetrate through the springs 25 for supporting the springs 25, one ends of the guide rods 31 are connected with the pressing block 26, the other ends of the guide rods 31 slidably penetrate through corresponding holes in the bracket 24 and are supported on the bracket 24, and the springs 25 can stretch or compress between the pressing block 26 and the bracket 24 along the guide rods 31 to apply force to the pressing block 26 so that the pressing block 26 has the tendency of. The bracket 24 is an L-shaped structure, one end of which is fixed on the base 1, and the other end of which is suspended above the base 1. A nut is mounted on the suspended end of the bracket 24 and a corresponding thread is provided on the pressure bar. The depression bar can be followed the direction motion of perpendicular to base 1, and the rotatable connection in briquetting 26 of depression bar one end, and the other end of depression bar is through rotatory with the nut cooperation, drives briquetting 26 and moves down or upwards to the realization is relaxed or is compressed tightly the purpose in area.

Preferably, the device further comprises a positioning block 32 which is arranged at a certain distance from the clamping block and near the position of the pressing device and used for positioning the side surface of the belt, and the positioning block and the clamping block together enable the belt to be in a straight state on the base 1, so that the measured data are more accurate. The positioning block 32 may be a single-sided positioning block 32, such as a part of the bracket 24, and is preferably a positioning block 32 separately mounted on the base 1, and the positioning surface of the positioning block 32 is in the same plane as the clamping surface 5.

During measurement, a part of the belt is laid on the base surface 10, the top surface of the belt is tightly attached to the base surface 10, two side surfaces of the belt are placed between the left clamping block 2 and the right clamping block 3 and are pushed to the positioning block 32, and the guide rod 31 is loosened to enable the belt to be clamped between the base 1 and the clamping blocks; the pressing rod on the pressing device is rotated to press the pressing block 26 on the bottom surface of the belt, the measuring part of the belt is in a flat and straight state, the distance of the measuring part is measured by the caliper 17, and the pitch line width of the belt is obtained.

The measuring tool is convenient to measure and high in precision under the condition that the structure of the belt is not damaged, and can be widely used for detecting the pitch line width of the stepless speed change belt.