A roller chain hinge wear test tool and roller chain wear test method

Abstract

The present invention provides a roller chain hinge wear test fixture, which at least includes an active swing arm, a mounting connecting rod, a plurality of support blocks and a loading mechanism. The active swing arm can swing left and right. The mounting connecting rod is connected to the active swing arm. A plurality of connecting rods are mounted on the mounting connecting rod, the connecting rods are parallel to the active swing arm, and the lower ends of the connecting rods are provided with connecting parts that can be connected to hinges. The support block is fixedly arranged below the connecting rod. The support block is provided with a mounting groove. The loading mechanism includes a chain plate that can be connected to the hinge and a load mechanism that is detachably fixedly connected to the chain plate, and the chain plate is provided with a socket for the hinge pin to pass through. The chain plate includes a first chain plate and a second chain plate, the first chain plate can be connected to the pin with a clearance fit, and the second chain plate can be fixedly connected to the pin with an interference fit. The present invention also provides a roller chain hinge wear test method. The present invention can very conveniently test the wear resistance of the roller chain pin and the sleeve hinge pair.

Description

Technical Field

[0001] The invention relates to the field of chain testing devices, and in particular to a roller chain hinge wear test fixture and a roller chain wear test method. Background Art

[0002] Roller chain transmission is a meshing transmission with an intermediate flexible part, which has developed into a very important basic component in the modern machinery industry. Wear is the most common failure form of roller chain, and each component of the roller chain will be worn and damaged during operation. One form of roller chain wear is that when the roller chain engages in and out of the sprocket, the adjacent hinges swing and pull against each other, resulting in wear caused by relative sliding friction between the pin and the sleeve pressure-bearing surface. Another form of wear is that the tension between adjacent hinges will increase the total length of the roller chain, making the edge of the roller chain easy to jump and increasing the impact during starting or reversing. When the wear and elongation of the hinge distance reaches a certain extent, the meshing of the roller chain hinge and the gear teeth will deteriorate, resulting in climbing and tooth jumping, increasing dynamic load, vibration, noise and other damage, etc.

[0003] Therefore, wear resistance is an important performance indicator of chain products. At present, the wear resistance test method of chains at home and abroad is the whole chain wear test. During the test, the roller chain needs to be installed on the chain wear test equipment as a whole, a certain load is applied and it runs at a specified speed, and the roller chain is measured regularly to determine the degree of wear. For example, the invention patent with publication number CN112254959A provides a chain wear resistance test device and its use method. The disadvantage of this scheme is that since the chain is relatively long as a whole, the test equipment is relatively large in size to match the chain, resulting in a large occupied space; and the test energy consumption and noise are also relatively large, the labor intensity of the test inspection personnel is very high, and because the chain is tested, the wear of the pin and the sleeve pressure-bearing surface in the hinge of the chain cannot be observed intuitively. If you want to observe and measure the wear of the pin, you must disassemble the roller chain and then remove the pin for observation. Summary of the invention

[0004] The technical problem to be solved by the present invention is that the existing equipment structure and usage method for testing the wear resistance of chains are very complicated. Usually, the chain needs to be installed as a whole on the equipment for testing, which not only causes the test equipment to be very large, but also causes high energy consumption and noise. Furthermore, the test method is also relatively complicated.

[0005] In order to solve the above technical problems, the technical solutions provided by the present invention are as follows:

[0006] The present invention provides a roller chain hinge wear test tool, which at least comprises:

[0007] An active swing arm, wherein the active swing arm is connected to a driving mechanism for driving the active swing arm to swing left and right;

[0008] A mounting connecting rod, wherein the mounting connecting rod is connected to the active swing rod; a plurality of connecting rods are mounted on the mounting connecting rod, wherein the connecting rods are parallel to the active swing rod, and a connecting portion that can be connected to a hinge is provided at the lower end of the connecting rod;

[0009] A loading mechanism, the loading mechanism comprising a chain plate that can be connected to the hinge, a load mechanism that is detachably fixedly connected to the chain plate, and a plurality of support blocks; the chain plate is provided with a socket for the hinge pin to pass through; the chain plate comprises a first chain plate and a second chain plate, the first chain plate can be connected to the pin with clearance fit, and the second chain plate can be fixedly connected to the pin with interference fit; the support block is fixedly arranged below the connecting rod, and the support block corresponds to the connecting rod one by one; the support block is provided with a mounting groove for mounting the hinge;

[0010] After the hinges are connected to the connecting rod and the mounting groove respectively, the active swing rod, the mounting connecting rod, the connecting rod and the hinge form a parallel four-bar mechanism.

[0011] Preferably, a locking member is further included, and the locking member can lock and fix the first chain plate and the pin shaft.

[0012] Preferably, it also includes an auxiliary rocker, which is connected to the mounting link and parallel to the active rocker, and the active rocker, the mounting link and the auxiliary rocker form a parallel four-bar mechanism.

[0013] Preferably, the connecting portion is rotatably connected to a hinge.

[0014] Furthermore, the connecting portion includes a clamp, and the clamp can clamp the upper roller of the hinge.

[0015] Preferably, the driving mechanism includes a driving wheel, which can rotate automatically, and an eccentric connecting slider is provided at a position deviating from the center of the driving wheel; a slide groove is provided on the active rocker arm, and the eccentric connecting slider is slidably connected to the slide groove.

[0016] Furthermore, the driving wheel is provided with an eccentric mounting groove extending in the radial direction, the eccentric connecting slider is connected in the eccentric mounting groove, and the eccentric connecting slider can be fixed at any position in the eccentric mounting groove.

[0017] Preferably, the loading mechanism comprises:

[0018] A load mounting plate, the load mounting plate being detachably fixedly connected to the first chain plate and the second chain plate;

[0019] A load connection block, the load connection block is fixedly connected to the load mounting plate;

[0020] A load member is detachably connected to the load connecting block.

[0021] The present invention also provides a roller chain wear test method, wherein each hinge comprises a lower roller, a hinge plate, a pin, a sleeve and an upper roller, wherein the sleeve is respectively arranged in the upper roller and the lower roller, wherein the pin passes through the hinge plate and is inserted into the sleeve, wherein the hinge is an independent entity, and the roller chain hinge wear test tool as described in any one of the above items is used;

[0022] Before the test, a load mechanism of appropriate weight is selected and hung on the chain plate;

[0023] The test steps include:

[0024] S1: Adjust the driving mechanism so that the active swing arm can swing within a preset amplitude range and at a preset frequency;

[0025] S2: Connect the upper roller and the connecting rod, install the lower roller in the installation groove, and install the pin, which passes through the chain plate and the hinge plate at the same time so that the loading mechanism is connected to the hinge;

[0026] S3: Start the driving mechanism to drive the active swing rod to swing, so that the hinge swings with the connecting rod;

[0027] S4: After the predetermined test time, stop the driving mechanism, remove the hinge, and observe the wear of various parts of the hinge.

[0028] Preferably, the roller chain hinge wear test fixture as described above is used, and step S3.5 is also included between step S3 and step S4: pausing the drive mechanism, removing the first chain plate, observing and recording the wear of the hinge, reinstalling the first chain plate after recording, and restarting the drive mechanism to allow the hinge to continue the swing test.

[0029] This solution can simulate the wear caused by relative sliding friction between the pin and other surfaces of the hinge when the adjacent hinges swing relative to each other at a specific angle when the chain engages in and out of the sprocket under a specified load. By presetting the swing angle and number of swings of the pressure-bearing surface of the pin, the wear state is recorded and the wear resistance is determined.

[0030] The advantages of this solution are:

[0031] 1. This scheme does not test the entire chain, but tests each hinge that makes up the chain. Since the hinge is generally small in size, the overall size of the roller chain hinge wear test fixture can be effectively controlled, and only the hinge wear is tested during the test, so the test equipment occupies a small area.

[0032] 2. The energy required to drive this tooling is low, and the vibration and noise generated during the swinging operation are small. The method of use is very simple, which effectively reduces the labor intensity of the testers and can improve the safety of the test.

[0033] 3. This tool can simulate various stress conditions of the hinge during actual use.

[0034] 4. Since the hinge is tested, it is only necessary to remove the hinge from the test fixture to observe the wear condition. However, the existing test device tests the entire roller chain. When observing the wear, it is necessary not only to remove the chain from the test fixture, but also to disassemble the chain into hinges. Obviously, this solution can more conveniently confirm the wear condition of the hinge. Moreover, each hinge is loaded independently, and the chain wear test fixture can test the hinge with several different load weights during one operation.

[0035] 5. You can also pause at any time, remove the first chain plate and observe the wear on the pin surface, directly correspond the wear amount to the number of swings, and after the observation is completed, install the first chain plate and continue the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 Shown is a schematic diagram of a preferred embodiment of a roller chain hinge wear test fixture;

[0037] Figure 2 The figure shows the installation structure diagram when the roller chain is installed on the support seat;

[0038] Figure 3 Shown is a front view of the loading assembly;

[0039] Figure 4 Shown is a side view of the loading assembly;

[0040] Explanation of the reference numerals: 10 - mounting rod, 11 - connecting rod, 111 - chuck, 12 - auxiliary rocker arm, 13 - active rocker arm, 20 - hinge, 21 - chain plate, 210 - sleeve, 211 - first chain plate, 212 - second chain plate, 213 - lower roller, 214 - locking member, 215 - socket, 22 - pin shaft, 23 - hinge plate, 24 - upper roller, 3 - support table top, 31 - support block, 310 - mounting groove, 4 - driving wheel, 41 - eccentric mounting groove, 42 - eccentric connecting slider, 43 - slide groove, 5 - load mechanism, 50 - load mounting plate, 51 - load connecting block, 52 - load member. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0042] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, an integral connection, or a detachable connection; it can be the internal connection of two components; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] A preferred embodiment of a roller chain hinge wear test fixture is as follows: Figure 1 As shown, it includes an active rocker arm 13, a mounting link 10 and a loading mechanism.

[0045] The lower end of the active swing arm 13 is rotatably connected to an external mechanism, for example, rotatably connected to the support table 3, and the active swing arm 13 can swing along the lower end. The active swing arm 13 is connected to a driving mechanism, and the driving mechanism can drive the active swing arm 13 to swing back and forth. The swing amplitude and swing frequency of the active swing arm 13 can be adjusted by adjusting the driving mechanism to meet different test conditions. The driving mechanism can be a motor or various existing common swing driving mechanisms. In this embodiment, a preferred driving mechanism embodiment is provided, and the driving mechanism includes a driving wheel 4, and the driving wheel 4 is connected to a driving motor or any other mechanism that can drive the driving wheel 4 to rotate, and the driving wheel 4 can rotate continuously. An eccentric connecting slider 42 is provided at a position deviating from the center of the circle on the driving wheel 4, and a slide groove 43 is provided on the active swing arm 13, and the eccentric connecting slider 42 is connected in the slide groove 43. The slide groove 43 extends along the length direction of the active swing arm 13. When the driving wheel 4 rotates, the eccentric connecting slider 42 can slide in the slide groove 43, driving the active swing arm 13 to swing, thereby realizing the driving function.

[0046] Furthermore, the driving wheel 4 is also provided with an eccentric mounting groove 41 extending in the radial direction, and the eccentric connecting slider 42 can be fixed at any position in the eccentric mounting groove 41. By adjusting the installation position of the eccentric connecting slider 42, the swing amplitude of the active swing arm 13 can be adjusted.

[0047] The mounting link 10 is connected to the active swing link 13, and the mounting link 10 is horizontally arranged and can swing left and right with the active swing link 13. The mounting link 10 is provided with a plurality of connecting rods 11, and the connecting rods 11 are parallel to the active swing link 13. When the mounting link 10 moves left and right, the connecting rods 11 also swing left and right, and the connecting rods 11 can be connected to the hinge 20 of the roller chain to drive the hinge 20 to swing. Generally speaking, the hinge includes an upper roller 24, a hinge plate 23 and a lower roller 213, and the hinge plate 23 is connected to the upper roller 24 and the lower roller 213, and the hinge plate 23 is usually connected to the upper roller 24 and the lower roller 213 by a pin shaft 24, and a sleeve 210 adapted to the pin shaft 24 is also arranged in the upper roller 24 and the lower roller 213, and the sleeve 210 and the pin shaft 24 are matched, and the lower roller 213 can swing around the pin shaft 24 after the sleeve 210 and the pin shaft 24 are matched. The connecting rod 11 includes a clamping portion, which includes a clamp 111, and the clamp 111 can clamp the upper roller 24 of the hinge. Of course, the connecting rod 11 can also use other solutions to stabilize the hinge 20, as long as the upper roller 24 can be installed on the connecting rod 11 and swing with the connecting rod 11.

[0048] Furthermore, the clamp 111 clamps the upper roller 24 in a clearance fit manner, and there is a certain gap between the upper roller 24 and the clamp 111, which can effectively prevent the clamp 111 from causing too much wear on the upper roller 24 in order to clamp the upper roller 24, so that the wear test of the upper roller 24 can be performed after the direction of the hinge 20 is subsequently reversed. This is because the connecting rod 11 only needs to play the role of moving the hinge 20 to swing, and does not need to strictly clamp the hinge 20. Under the premise of having a gap, the clamp 111 can play the role of moving the hinge 20 to swing as long as it touches the upper roller 24.

[0049] Furthermore, an auxiliary swing rod 12 is provided which is parallel to the active swing rod 13, and the lower end of the auxiliary swing rod 12 is rotatably connected to the external mechanism, and the connection position is at the same horizontal height as the connection position of the lower end of the active swing rod 13. The auxiliary swing rod 12 is also connected to the mounting link 10. The active swing rod 13, the auxiliary swing rod 12 and the mounting link 10 form a parallel four-bar mechanism with stable movement. The auxiliary swing rod 12 can enhance the swing stability of the active swing rod 13.

[0050] The loading mechanism includes a chain plate 21, a load mechanism and a support block 31. The load mechanism is detachably fixedly connected to the chain plate 21, and the load mechanism has a certain weight. The chain plate 21 can be connected to the hinge 20. The connection between the chain plate 21 and the hinge 20 is as follows: Figure 2As shown, a socket 215 is provided on the chain plate 21, and the pin 22 passes through the socket 215 and is inserted into the lower roller 213, thereby connecting the chain plate 21 and the hinge 20 to each other. The load mechanism can provide a pulling force to the pin 22 of the hinge through the chain plate 21, simulating the pulling force generated between adjacent hinges during the actual use of the roller chain. When the connecting rod 11 swings, the hinge is driven to swing. At this time, since the chain plate 21 is fixedly connected to the pin 22, the pin 22 can rotate relative to the hinge plate 23, so there will be relative movement between the chain plate 21 and the hinge plate 23, simulating the friction generated between adjacent hinges during the actual use of the roller chain. Generally, a sleeve 210 adapted to the pin 22 is provided in the roller, and the wear resistance of the sleeve 210 can also be tested when the pin 22 rotates relative to the lower roller 213. It can be seen from this that the roller chain hinge wear test fixture can simulate the various external forces that the hinge is subjected to during use. By replacing the load mechanism, the tension on the hinge can be adjusted, so as to facilitate the simulation of different working conditions. The support block 31 is fixedly arranged. For example, referring to the present embodiment, a support table 3 is arranged to fix the support block 31. The support block 31 corresponds to the connecting rod 11 one by one, and each connecting rod 11 corresponds to a support block 31. The support block 31 is provided with a mounting groove 310, and the mounting groove 310 is adapted to the lower roller 213 of the hinge, and the lower roller 213 can be installed in the mounting groove 310. Specifically, the shape of the mounting groove 310 is the same as the tooth groove shape of the sprocket connected when the hinge 20 is used, which can simulate the engagement between the hinge 20 and the sprocket. The function of the support block 31 is to provide support for the hinge so that the hinge can remain stable during the test. Moreover, during the swinging process of the hinge, the lower roller 213 rolls in the mounting groove 310, which can simulate the friction suffered by the roller during actual use.

[0051] like Figure 2 As shown, the chain plate 21 includes a first chain plate 211 and a second chain plate 212, wherein the second chain plate 212 is interference-fitted with the pin 22, so that the second chain plate 212 can be fixed with the pin 22; the first chain plate 211 is clearance-fitted with the pin 22, and a locking member 214 is provided to press the first chain plate 211 and the hinge plate 23 to prevent the first chain plate 211 from falling off. The locking member 214 can be selected from existing locking members, which will not be described in detail here. In this scheme, the driving mechanism can be paused at any time during the test, and then the first chain plate 211 can be easily removed by removing the locking member 214 to confirm the wear condition of the hinge 20. After confirmation, the first chain plate 211 can be re-fixed to continue the test. The second hinge plate 212 is always fixedly connected to the pin 22, which will not affect the loading mechanism from applying load to the hinge. Therefore, this preferred embodiment helps to record the wear condition at any time without completely removing the hinge, which increases the diversity of the test method.

[0052] The specific structure of the load mechanism is as follows: Figure 3 and Figure 4 As shown, it includes a load mounting plate 50, a load connecting block 51 and a load member 52. The load mounting plate 50 is connected to the first chain plate 211 and the second chain plate 212 at the same time, ensuring that the load mechanism is stably connected to the chain plates and that the forces on both sides of the hinge are uniform. The load connecting block 51 is fixedly connected to the load mounting plate 50, and a mounting position for the load member 52 is provided on the load connecting block 51. The load member 52 can be removed, and by replacing the load member 52 with different weights, the load applied to the load mechanism can be changed, so as to facilitate the test, and the replacement method is also very simple.

[0053] The roller chain wear test tool can be used to perform a roller chain wear test. The test object of the roller chain wear test is the roller chain hinge 20, which is an independent individual after disassembly. Figure 1 and Figure 3 This embodiment provides a specific roller chain wear test method, and its specific scheme is as follows:

[0054] Before the test, the magnitude of the pulling force required to be applied to the hinge 20 is determined first, and a load mechanism of appropriate weight is selected to be hung on the chain plate 212 .

[0055] The specific test steps include:

[0056] S1: Adjust the driving mechanism so that the active swing arm 13 can swing within a preset amplitude range and at a preset frequency. Specifically for this embodiment, first adjust the position of the eccentric connecting slider 42 in the eccentric mounting groove 41. The closer the eccentric connecting slider 42 is to the edge of the driving wheel 4, the greater the swing amplitude of the active swing arm 13. By adjusting the rotation speed of the driving wheel 4, the swing frequency of the active swing arm 13 can be adjusted. If necessary, a counting sensor and an angle encoder can be set to automatically record the swing frequency and swing amplitude of the active swing arm 13.

[0057] S2: Install the hinge 20. Connect the upper roller 24 to the connecting rod 11, install the lower roller 213 into the installation groove 310, and connect the chain plate 21 to the lower roller 213. The chain plate 21 is provided with a socket 215, and the pin 22 is passed through the socket 215 and the lower roller 213 at the same time to achieve the connection between the chain plate 21 and the hinge 20.

[0058] S3: Start the driving mechanism, so that the active swing rod 13 starts to swing, driving the mounting link 10 and the connecting rod 11 to swing, and the connecting rod 11 swings the hinge. The active swing rod 13, the mounting link 10 and the connecting rod 11 form a parallel four-bar mechanism that swings left and right, driving the hinge 20 to swing. Friction will be generated between the hinge 20 and the chain plate 21, and the chain plate 21 will also apply tension to the pin 22, simulating the force mode of the hinge 20 in actual use, and performing a wear test.

[0059] S3.5: Pause the driving mechanism, remove the locking member 214, and remove the first chain plate 211, and observe and record the wear of the pin 22. Then install the first chain plate 211 and the locking member 214 to continue the test. This step is mainly to facilitate recording the wear at any time, rather than waiting until the preset test time to confirm the wear, which helps to confirm the test data at any time. Moreover, after the pause, you only need to remove the first chain plate 211 without removing the chain plate 21 as a whole. Since the first chain plate 211 is a clearance fit, it is also very convenient to disassemble, so the operation method is also very simple.

[0060] S4: After a predetermined test time, the driving mechanism is stopped, the hinge 20 is removed, and the wear condition is observed and recorded.

[0061] In the roller chain test method provided by the present scheme, the tension applied by the chain plate 21 to the pin 22 can simulate the tension generated between the hinges connected to each other when the roller chain is used; the friction between the chain plate 21 and the pin 22 can simulate the friction suffered by the pin 22 in actual use; the friction generated between the chain plate 21 and the hinge plate 23 can simulate the friction suffered by the hinge plate 23 in actual use; the pin 22 applies pressure to the sleeve 210 after being pulled downward by the chain plate 21, which can simulate the pressure suffered by the sleeve 210 in actual use; the first chain plate 211 and the pin 22 have an interference fit, so when the hinge 20 swings, the pin 22 will also roll relative to the sleeve 210, simulating the wear caused by the relative sliding friction between the pressure-bearing surfaces of the pin 24 and the sleeve 210 caused by the swinging of adjacent hinges when the roller chain engages in and out of the sprocket under specified load conditions. It can be seen that the roller chain test method provided by the present scheme can simulate various stress conditions of the hinge 20 in normal use, so the wear resistance tested is more accurate. Moreover, the present embodiment tests a single hinge 20, and after the hinge 20 is removed, the wear of the pin 22 or other parts of the hinge 20 can be observed very intuitively, thus helping to simplify the workflow and improve test efficiency.

[0062] In short, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A roller chain hinge wear test tool, characterized in that: At least: An active swing arm (13), the active swing arm being connected to a driving mechanism for driving the active swing arm to swing left and right; A mounting connecting rod (10), the mounting connecting rod being connected to the active swing arm; a plurality of connecting rods (11) are mounted on the mounting connecting rod, the connecting rods are parallel to the active swing arm, and the lower ends of the connecting rods are provided with connecting portions that can be connected to hinges (20); A loading mechanism, the loading mechanism comprising a chain plate (21) connectable to a hinge, a load mechanism detachably fixedly connected to the chain plate, and a plurality of support blocks (31); the chain plate is provided with a socket (215) through which a hinge pin can pass; the chain plate comprises a first chain plate (211) and a second chain plate (212), the first chain plate being connected to the pin with a clearance fit, and the second chain plate being fixedly connected to the pin with an interference fit; the support block is fixedly arranged below the connecting rod, and the support block corresponds to the connecting rod one by one; the support block is provided with a mounting groove (310) for mounting the hinge; The load mechanism comprises: A load mounting plate (50), the load mounting plate being detachably fixedly connected to the first chain plate and the second chain plate; A load connection block (51), the load connection block being fixedly connected to the load mounting plate; A load member (52), the load member being detachably connected to the load connection block; After the hinges are connected to the connecting rod and the mounting groove respectively, the active swing rod, the mounting connecting rod, the connecting rod and the hinge form a parallel four-bar mechanism.

2. The roller chain hinge wear test fixture according to claim 1, characterized in that: Also included is a locking member (214), which can lock and fix the first chain plate and the pin shaft.

3. The roller chain hinge wear test fixture according to claim 1, characterized in that: It also includes an auxiliary swing rod (12), which is connected to the mounting connecting rod and is parallel to the active swing rod. The active swing rod, the mounting connecting rod and the auxiliary swing rod form a parallel four-bar mechanism.

4. The roller chain hinge wear test fixture according to claim 1, characterized in that: The connecting portion is rotatably connected to the hinge.

5. The roller chain hinge wear test fixture as claimed in claim 4, characterized in that: The connecting portion comprises a clamp (111), which can clamp an upper roller (24) of the hinge.

6. The roller chain hinge wear test fixture according to claim 1, characterized in that: The driving mechanism comprises a driving wheel (4) which can rotate automatically, an eccentric connecting slider (42) being provided at a position deviating from the center of the driving wheel; a slide groove (43) being provided on the active swing arm, and the eccentric connecting slider being slidably connected to the slide groove.

7. The roller chain hinge wear test fixture according to claim 6, characterized in that: The driving wheel is provided with an eccentric mounting groove (41) extending in the radial direction, the eccentric connecting slider is connected in the eccentric mounting groove, and the eccentric connecting slider can be fixed at any position in the eccentric mounting groove.

8. A roller chain wear test method, the roller chain comprising a plurality of hinges, each hinge comprising a lower roller (213), a hinge plate (23), a pin (22), a sleeve (210) and an upper roller (24), the sleeves being respectively arranged in the upper roller and the lower roller, the pin being able to pass through the hinge plate and be inserted into the sleeve to connect the hinge plate with the upper roller and the lower roller, characterized in that: Using the roller chain hinge wear test fixture as described in any one of claims 1 to 7; Before the test, first remove the pin in the lower roller; select a load mechanism of appropriate weight and hang the load mechanism on the chain plate; The test steps include: S1: Adjust the driving mechanism so that the active swing arm can swing within a preset amplitude range and at a preset frequency; S2: Connect the upper roller and the connecting rod, install the lower roller in the installation groove, align the socket of the chain plate with the lower roller, and then install the pin, which passes through the chain plate and the hinge plate at the same time so that the chain plate is connected to the hinge; S3: Start the driving mechanism to drive the active swing rod to swing, so that the hinge swings with the connecting rod; S4: After the predetermined test time, stop the driving mechanism, remove the hinge, and observe the wear of various parts of the hinge.

9. The roller chain wear test method according to claim 8, characterized in that: Between step S3 and step S4, there is also step S3.5: pausing the driving mechanism, removing the first chain plate, observing and recording the wear of the hinge, reinstalling the first chain plate after recording, and restarting the driving mechanism to allow the hinge to continue the swing test.

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