Chain friction work testing device

Abstract

The utility model relates to the field of chain processing, and particularly discloses a chain friction work testing device. The chain friction work test device comprises a base, a test chain wheel and an accompanying test chain wheel are rotatably and movably arranged on the base, the test chain wheel and the accompanying test chain wheel are distributed in a coplanar mode, and the rotation center line of the test chain wheel is horizontally arranged; the device further comprises a test pendulum bob which is connected with the test chain wheel and rotates synchronously with the test chain wheel. The base is also provided with a height fixing mechanism, the height fixing mechanism comprises a locking unit, and the locking unit is used for locking the test pendulum bob and can be controlled to unlock. According to the chain friction work test device, the friction work of the chain is tested and evaluated in a relative measurement mode through simulation operation, and the chain friction work test device has the advantages of being simple in structure and convenient to operate.

Description

Technical Field

[0001] The utility model relates to the field of chain processing, in particular to a chain friction work testing device. Background Art

[0002] Chains are common transmission structures in the mechanical field, with the advantages of precise transmission ratio and large load transmission. Chains are usually formed by connecting multiple links in series, and the links are riveted by pins. In view of the structural characteristics of the chain, friction is inevitable during the chain transmission process. Taking the roller chain transmission as an example, during the transmission process, the rollers on the chain directly collide with the bottom of the sprocket teeth to generate friction, and friction is also generated when the chain plate and the pin rotate. The running friction work inside the chain will cause a certain loss of the transmitted load, thereby reducing the efficiency of the transmission system, and will cause wear on the internal components, affecting the service life. With the increasing requirements of users for chain transmission systems, especially in the field of automobile engine timing systems, the efficiency and life requirements of the chain system are almost harsh.

[0003] The design, processing and assembly processes of the chain will affect the friction work. The factors affecting the friction work are complex, so it is necessary to evaluate the friction work of the chain through experiments to determine whether the transmission efficiency and service life of the chain meet the design standards. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a chain friction work test device, which uses a relative measurement form to test and evaluate the friction work of the chain through simulated operation, and has the advantages of simple structure and convenient operation.

[0005] In order to solve the above technical problems, the technical solution provided by the utility model is as follows: a chain friction work testing device, comprising a base, on which a test sprocket and an accompanying test sprocket are rotatably arranged, the test sprocket and the accompanying test sprocket are coplanarly distributed, and the rotation center line of the test sprocket is horizontally arranged; it also includes a test pendulum, which is connected to the test sprocket and rotates synchronously; the base is also provided with a height setting mechanism, which includes a locking unit, which is used to lock the test pendulum and can be unlocked in a controlled manner.

[0006] When conducting the test, the chain to be tested is placed on the test sprocket and the accompanying test sprocket, the test pendulum is lifted to the fixed height mechanism and then falls freely, the test pendulum, test sprocket and chain move synchronously, the swing height of the test pendulum will decrease due to the friction loss of the chain operation, and the swing height or swing time of the test pendulum can be used to indirectly judge whether the friction work parameters of the test chain are qualified.

[0007] The coplanar distribution of the test sprocket and the accompanying test sprocket can reduce the extra loss of the chain caused by installation. The setting of the height-fixing mechanism can keep the initial height of the test pendulum stable and control the test variables.

[0008] The chain friction work test device of the present application can simulate the operation of the chain and, through the swing of the test pendulum, use a relative measurement form to test and evaluate the friction work of the chain, and has the advantages of simple structure and easy operation.

[0009] Preferably, the base is provided with scales, and the scales are distributed along the vertical direction, so that the test parameters can be read more objectively and directly, the difficulty of test operation is reduced, and the reliability of test results is improved.

[0010] Preferably, the test pendulum comprises a hammer body and a swing arm, one end of the swing arm is fixedly connected to the hammer body, and the other end is detachably connected to the test sprocket via an open fixing ring, and a fastening bolt is provided at the opening of the open fixing ring.

[0011] Preferably, the locking unit comprises an electromagnet.

[0012] Preferably, the locking unit comprises a locking pin and a locking driver, wherein the locking driver is used to drive the locking pin to move axially; and the test pendulum is provided with a locking hole matching the locking pin.

[0013] Preferably, the base comprises a vertically arranged mounting plate, and the test sprocket is located below the accompanying test sprocket.

[0014] Preferably, the accompanying test sprocket is fixedly connected to the mounting plate, and the test sprocket is movably arranged on the mounting plate up and down.

[0015] Preferably, a sliding mounting seat is provided on the base, and the sliding mounting seat is connected to the base via two parallel sliding guide rails; the test sprocket is installed on the sliding mounting seat, and the test sprocket is located between the two sliding guide rails.

[0016] The movable setting of the test sprocket can facilitate the loading of the chain, and at the same time, a certain tensioning force can be applied to the chain through the dead weight of the test sprocket.

[0017] Preferably, the height-fixing mechanism further comprises a height-fixing seat, the height-fixing seat is located on one side of the test sprocket, and the locking unit is arranged on the height-fixing seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the structure of the chain friction work test device of this embodiment;

[0019] Figure 2This is a schematic diagram of the structure of the chain friction work test device of this embodiment without the test pendulum;

[0020] Figure 3 It is a front view of the chain friction work test device of this embodiment with the test pendulum removed;

[0021] Figure 4 Schematic diagram of the structure of the test pendulum in the chain friction work test device of this embodiment;

[0022] Figure 5 It is a structural schematic diagram of the coordination between the height-fixing mechanism and the test pendulum in the chain friction work test device of this embodiment. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model. Example

[0024] like Figure 1-Figure 3 As shown, a chain friction work test device includes a base 1, on which a test sprocket 5 and a companion test sprocket 2 are rotatably arranged, the test sprocket 5 and the companion test sprocket 2 are coplanarly distributed, and the rotation centerline of the test sprocket 5 is horizontally arranged.

[0025] like Figure 1-Figure 3 As shown, specifically, the base 1 includes a vertically arranged mounting plate, and the test sprocket 5 is located below the accompanying test sprocket 2.

[0026] like Figure 1-Figure 3 As shown, further, the accompanying test sprocket 2 is fixedly connected to the mounting plate, and the test sprocket 5 is movably arranged on the mounting plate up and down.

[0027] like Figure 1-Figure 3 As shown, specifically, the base 1 is provided with a sliding mounting seat 6, and the sliding mounting seat 6 is connected to the base 1 through two parallel sliding guide rails 7. The test sprocket 5 is installed on the sliding mounting seat 6, and the test sprocket 5 is located between the two sliding guide rails 7. The movable setting of the test sprocket 5 can facilitate the loading of the chain 8, and at the same time, a certain tension can be applied to the chain 8 through the deadweight of the test sprocket 5.

[0028] As a specific implementation, the base 1 is provided with a scale (not shown in the figure), and the scale is distributed along the vertical direction, which can read the test parameters more objectively and directly, reduce the difficulty of test operation, and improve the reliability of test results.

[0029] like Figure 1 and Figure 4 As shown, the test pendulum 4 is also included, and the test pendulum 4 is connected to the test sprocket 5 and rotates synchronously. The test pendulum 4 includes a hammer body 42 and a swing arm 41. One end of the swing arm 41 is fixedly connected to the hammer body 42, and the other end is detachably connected to the test sprocket 5 through an open fixing ring. A fastening bolt is provided at the opening of the open fixing ring. As a specific embodiment, the length of the swing arm 41 is adjustable to meet the test requirements of chains of different lengths.

[0030] like Figure 1-Figure 3 As shown, the base 1 is also provided with a height setting mechanism 3, which includes a locking unit, which is used to lock the test pendulum 4 and can be unlocked in a controlled manner. The height setting mechanism 3 also includes a height setting seat, which is located on one side of the test sprocket 5, and the locking unit is arranged on the height setting seat.

[0031] As a specific implementation, the locking unit includes an electromagnet.

[0032] like Figure 5 As shown in FIG. 1 , as another specific embodiment, the locking unit comprises a locking pin 32 and a locking driver 31 , wherein the locking driver 31 is used to drive the locking pin 32 to move axially. A locking hole 43 matching the locking pin 32 is provided on the test pendulum 4 .

[0033] When conducting the test, the chain 8 to be tested is placed on the test sprocket 5 and the accompanying test sprocket 2, the test pendulum 4 is lifted to the fixed height mechanism 3 and then falls freely, the test pendulum 4, the test sprocket 5 and the chain 8 move synchronously, due to the friction loss of the chain 8, the swing height of the test pendulum 4 will decrease and gradually stop swinging. The swing height or swing time of the test pendulum 4 can be used to indirectly judge whether the friction work parameters of the test chain 8 are qualified.

[0034] The coplanar distribution of the test sprocket 5 and the accompanying test sprocket 2 can reduce the extra loss of the chain caused by installation. The setting of the height-fixing mechanism 3 can keep the initial height of the test pendulum 4 stable and control the test variables.

[0035] The chain friction work test device of the present application can simulate the operation of the chain and, through the swing of the test pendulum 4, conduct a test evaluation on the friction work of the chain in a relative measurement form, and has the advantages of simple structure and convenient operation.

[0036] 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 chain friction work test device, characterized in that: It includes a base, on which a test sprocket and an accompanying test sprocket are rotatably arranged, the test sprocket and the accompanying test sprocket are coplanarly distributed, and the rotation center line of the test sprocket is horizontally arranged; it also includes a test pendulum, which is connected to the test sprocket and rotates synchronously; the base is also provided with a height-fixing mechanism, which includes a locking unit, which is used to lock the test pendulum and can be unlocked in a controlled manner.

2. The chain friction work test device according to claim 1, characterized in that: The base is provided with scales, and the scales are distributed along the vertical direction.

3. The chain friction work test device according to claim 1, characterized in that: The test pendulum comprises a hammer body and a swing arm, one end of the swing arm is fixedly connected to the hammer body, and the other end is detachably connected to the test sprocket through an open fixing ring, and a fastening bolt is provided at the opening of the open fixing ring.

4. The chain friction work test device according to claim 1, characterized in that: The locking unit comprises an electromagnet.

5. The chain friction work test device according to claim 1, characterized in that: The locking unit comprises a locking pin and a locking driving member, wherein the locking driving member is used to drive the locking pin to move axially; and a locking hole matching the locking pin is provided on the test pendulum.

6. The chain friction work test device according to any one of claims 1 to 5, characterized in that: The base comprises a vertically arranged mounting plate, and the test sprocket is located below the accompanying test sprocket.

7. The chain friction work test device according to claim 6, characterized in that: The accompanying test sprocket is fixedly connected to the mounting plate, and the test sprocket is movably arranged on the mounting plate up and down.

8. The chain friction work test device according to claim 7, characterized in that: The base is provided with a sliding mounting seat, and the sliding mounting seat is connected to the base through two parallel sliding guide rails; the test sprocket is installed on the sliding mounting seat, and the test sprocket is located between the two sliding guide rails.

9. The chain friction work test device according to claim 6, characterized in that: The height-fixing mechanism further comprises a height-fixing seat, the height-fixing seat is located at one side of the test sprocket, and the locking unit is arranged on the height-fixing seat.

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