Bidirectional testing device for two-shaft torque limiter

Abstract

The utility model discloses a bidirectional testing device for a two-axis torque limiter, relates to the field of workpiece performance testing, solves the problems that an existing loading testing function is single in test, the reliability of a test result is not high, and the workpiece performance cannot be accurately evaluated, and comprises a test bed, a workpiece clamp arranged on the test bed, an axial loading piece and a lateral loading piece. The workpiece clamp comprises a base arranged on the test bed, a fixing plate for installing a workpiece, a test rod arranged on the base and a limiting ring coaxially arranged at one end of the test rod, the limiting ring and the workpiece are located on one side of the fixing plate, the fixing plate is arranged on the base, and the limiting ring is arranged on the base. A grating ruler for measuring displacement is arranged between the base and the test bench, and a locking piece is arranged between the test rod and the base; the output end of the axial loading piece can abut against the test rod, and the output end of the lateral loading piece can abut against the limiting ring. The method has the effect of improving the reliability of the test result.

Description

Technical Field

[0001] The present application relates to the field of workpiece performance testing, and in particular to a bidirectional testing device for a two-axis torque limiter. Background Art

[0002] The torque limiter, also known as a safety coupling or torque limiter, is a component that connects the driving machine and the working machine. Its main function is overload protection. When the required torque exceeds the set value due to overload or mechanical failure, it limits the torque transmitted by the transmission system in the form of slippage. When the overload disappears, it automatically restores the connection to prevent mechanical damage and avoid expensive downtime losses.

[0003] In practical applications, two-axis torque limiters are commonly used, which usually have an input shaft and an output shaft, which are used to receive the torque transmitted from the driving shaft and transmit it to the next transmission component. When the torque exceeds the preset limit value, the two-axis torque limiter will start, allowing relative sliding or separation between the driving shaft and the driven shaft, thereby cutting off the transmission of torque and protecting the transmission system from damage.

[0004] In production and processing, in order to ensure the performance reliability and completeness of the two-axis torque limiter under various conditions, it is usually necessary to perform a load test on the two-axis torque limiter. The existing test methods mostly use a torque wrench to insert the torque output of the torque wrench into the workpiece (two-axis torque limiter), and then increase the torque value step by step, while observing whether the indicator light of the two-axis torque limiter is on; when the indicator light is on, the two-axis torque limiter will automatically cut off the power to achieve the protection purpose, and the test is completed. Manual testing with a torque wrench can generally only test the axial direction of the workpiece. Not only is the functional test single, but the reliability of the test results is not high, and the workpiece performance cannot be accurately evaluated; therefore, a two-way test device for a two-axis torque limiter is urgently needed to solve the above problems. Utility Model Content

[0005] In order to improve the reliability of the test results, the present application provides a bidirectional testing device for a two-axis torque limiter.

[0006] The present application provides a bidirectional testing device for a two-axis torque limiter, which adopts the following technical solution:

[0007] A bidirectional testing device for a two-axis torque limiter comprises a test bench, a workpiece fixture arranged on the test bench, an axial loading part, and a lateral loading part;

[0008] The workpiece fixture comprises a base arranged on the test bench, a fixing plate for installing the workpiece, a test rod arranged on the base, and a limit ring coaxially arranged on one end of the test rod, wherein the limit ring and the workpiece are respectively located on one side of the fixing plate, the fixing plate is arranged on the base, a grating ruler for measuring displacement is arranged between the base and the test bench, and a locking piece is arranged between the test rod and the base;

[0009] The output end of the axial loading member may abut against the test rod, and the output end of the lateral loading member may abut against the limit ring.

[0010] Preferably, the axial loader includes a first connecting seat arranged on the test bench, a first electric cylinder and a first drive motor arranged on the first connecting seat, and a first push rod connected to the output end of the first electric cylinder, the first push rod is used to abut the test rod, a first torque sensor is arranged between the first push rod and the first electric cylinder, and the first drive motor is used to drive the first push rod to move.

[0011] Preferably, the lateral loader includes a second connecting seat arranged on the test bench, a second electric cylinder and a second drive motor arranged on the second connecting seat, and a second push rod connected to the output end of the second electric cylinder, the second push rod is used to abut against a limit ring, the axial direction of the second push rod is arranged perpendicular to the axial direction of the first push rod, a second torque sensor is arranged between the first push rod and the second electric cylinder, and the second drive motor is used to drive the second push rod to move.

[0012] Preferably, the grating ruler includes a first grating displacement sensor arranged on the base and a second grating displacement sensor arranged on the test bench, the first grating displacement sensor is arranged directly below the test rod, and there are at least two second grating displacement sensors, one of which is used to detect the output end of the first electric cylinder, and the other second grating displacement sensor is used to detect the output end of the second electric cylinder.

[0013] Preferably, the locking member comprises a connecting frame arranged on the base, and a fixing ring arranged on the connecting frame, the test rod and the fixing ring are coaxially arranged, and the test rod is fixed to the inner wall of the fixing ring.

[0014] In summary, the present application includes at least one of the following beneficial effects:

[0015] During the test, the workpiece is mounted on a fixed plate, and the test rod is coaxially connected to the workpiece. The output end of the axial loader is abutted against one end of the test rod to apply an axial force or torque to the test rod. The first torque sensor is then used to measure the axial force or torque applied to the workpiece to complete the axial test. The output end of the lateral loader is then abutted against the side wall of the limit ring to apply a lateral force or torque thereto. The second torque sensor is used to measure the force or torque applied laterally to the workpiece. In this process, the displacement of the test rod is measured using the first grating displacement sensor and two second grating displacement sensors. The acquired test data is directly fed back to the host computer, and the experimental results are output to complete the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of this embodiment of the present application;

[0017] Figure 2 is a perspective schematic diagram of the embodiment of the present application highlighting the axial loading member;

[0018] Figure 3 It is a perspective schematic diagram highlighting the side loading component of this embodiment of the present application.

[0019] Explanation of the accompanying drawings: 1. test bench; 2. workpiece fixture; 21. base; 22. fixing plate; 23. test rod; 24. limiting ring; 3. axial loading member; 31. first connecting seat; 32. first electric cylinder; 33. first drive motor; 34. first push rod; 4. lateral loading member; 41. second connecting seat; 42. second electric cylinder; 43. second drive motor; 44. second push rod; 5. locking member; 51. connecting frame; 511. vertical rod; 512. horizontal rod; 52. fixing ring; 6. first torque sensor; 7. second torque sensor; 8. grating scale; 81. first grating displacement sensor; 82. second grating displacement sensor. DETAILED DESCRIPTION

[0020] The present application is further described in detail below in conjunction with the accompanying drawings.

[0021] Reference Figure 1 The embodiment of the present application discloses a bidirectional testing device for a two-axis torque limiter, comprising a test bench 1, a workpiece fixture 2, an axial loading member 3 and a lateral loading member 4 installed on the top of the test bench 1. During the experiment, the workpiece is locked by the workpiece fixture 2, and then the axial loading member 3 and the lateral loading member 4 are used to apply force or torque to the workpiece respectively, and then the experimental data is fed back to the host computer (referring to the computer) through a series of detectors.

[0022] Reference Figure 1 and Figure 2Specifically, the workpiece fixture 2 includes a base 21 installed on the top of the experiment, a fixing plate 22 for installing the workpiece, a test rod 23 for coaxially fixing the workpiece, and a limit ring 24 coaxially installed on one end of the test rod 23. The base 21 is generally a rectangular box-shaped structure, the fixing plate 22 and the test rod 23 are located inside the base 21, and the limit ring 24 is located outside the base 21.

[0023] Reference Figure 2 and Figure 3 Two locking members 5 are arranged between the test rod 23 and the base 21, and the locking members 5 include a connecting frame 51 fixed in the base 21 and a fixing ring 52 arranged on the connecting frame 51. The connecting frame 51 includes two vertical rods 511 fixed to the base 21, a horizontal rod 512 connected to the two vertical rods 511, and the fixing ring 52 is fixed to the middle position of the horizontal rod 512. During installation, the fixing ring 52 and the test rod 23 are coaxially arranged, and the outer surface of the test rod 23 is fixedly connected to the inner wall of the fixing ring 52. In addition, during testing, the limit ring 24 and the workpiece are respectively located on one side of the fixed plate 22, that is, the workpiece is located inside the base 21; the output end of the axial loader 3 can abut against the test rod 23, and the output end of the lateral loader 4 can abut against the limit ring 24.

[0024] Reference Figure 2 Furthermore, the axial loading member 3 includes a first connecting seat 31 installed on the top of the test bench 1, a first electric cylinder 32 and a first drive motor 33 installed in the first connecting seat 31, and a first push rod 34 fixedly connected to the output end of the first electric cylinder 32. Among them, the first electric cylinder 32 adopts an electric cylinder driven by a precision ball screw, and the first drive motor 33 adopts an imported servo motor. The first push rod 34 abuts against one end of the test rod 23, and the first push rod 34 and the test rod 23 are coaxially arranged when installed. When the first drive motor 33 receives the command from the upper computer, it starts to rotate, and transmits the rotational motion to the screw of the first electric cylinder 32 through the reducer. The rotational motion of the screw is converted into the linear motion of the first push rod 34, and the axial loading test is performed on the test rod 23.

[0025] Reference Figure 2 A first torque sensor 6 is installed between the first push rod 34 and the first electric cylinder 32 for detecting the force or torque applied axially to the workpiece and feeding back to the host computer.

[0026] Reference Figure 3In addition, the lateral loading component 4 includes a second connecting seat 41 installed on the top of the test bench 1, a second electric cylinder 42 and a second drive motor 43 installed inside the second connecting seat 41, and a second push rod 44 connected to the output end of the second electric cylinder 42. Among them, the second electric cylinder 42 also adopts an electric cylinder driven by a precision ball screw, and the second drive motor 43 also adopts an imported servo motor. The second push rod 44 abuts against the side wall of the limit ring 24, and the axial direction of the second push rod 44 and the axial direction of the test rod 23 are perpendicular to each other during installation. When the second drive motor 43 receives the command from the upper computer, it starts to rotate, and transmits the rotational motion to the screw of the second electric cylinder 42 through the reducer. The rotational motion of the screw is converted into the linear motion of the second push rod 44, and the lateral loading test is performed on the limit ring 24.

[0027] Reference Figure 3 A second torque sensor 7 is installed between the second push rod 44 and the second electric cylinder 42 to detect the force or torque applied to the workpiece laterally and feed it back to the host computer.

[0028] Reference Figure 2 and Figure 3 A grating ruler 8 is provided between the base 21 and the test bench 1 for detecting the displacement. The grating ruler 8 includes a first grating displacement sensor 81 installed in the base 21 and a second grating displacement sensor 82 installed on the test bench 1. The first grating displacement sensor is located directly below the test rod 23 and is used to detect the displacement of the test rod 23. There are two second grating displacement sensors 82, one of which is used to detect the output end of the first electric cylinder 32, and the other second grating displacement sensor 82 is used to detect the output end of the second electric cylinder 42.

[0029] The implementation principle of a bidirectional testing device for a two-axis torque limiter in the embodiment of the present application is as follows:

[0030] During the test, the workpiece is mounted on the fixed plate 22, and the test rod 23 is coaxially inserted into the workpiece and fixedly connected to the workpiece; the host computer outputs a signal to control the operation of the first drive motor 33, and transmits the rotational motion to the lead screw of the first electric cylinder 32 through the reducer, and the rotational motion of the lead screw is converted into the linear motion of the first push rod 34, and the test rod 23 is loaded and tested. At the same time, the displacement generated by the first drive motor 33 is measured by the first torque sensor 6 and the corresponding second torque sensor 7, and the force or torque applied to the workpiece is measured by the first torque sensor 6, and the data is fed back to the host computer.

[0031] Similarly, when the workpiece is tested laterally, the host computer outputs a signal to control the second drive motor 43 to work, and transmits the rotational motion to the screw of the second electric cylinder 42 through the reducer. The rotational motion of the screw is converted into the linear motion of the second push rod 44, and the limit ring 24 is loaded laterally. At the same time, the first torque sensor 6 and the corresponding second torque sensor 7 are used to measure the displacement generated by the second drive motor 43, and the second torque sensor 7 is used to measure the force or torque applied to the workpiece, and the data is fed back to the host computer. Adaptive PID adjustment control is performed through real-time load and displacement to achieve the required loading mode and complete the test; bidirectional testing of the workpiece can not only improve the function, but also adopt a full electric drive mode in the test process, the test structure is more reliable, and the performance of the workpiece can be more accurately evaluated.

[0032] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A bidirectional test device for a two-axis torque limiter, characterized in that: It comprises a test bench (1), a workpiece fixture (2) arranged on the test bench (1), an axial loading component (3), and a lateral loading component (4); The workpiece fixture (2) comprises a base (21) arranged on the test bench (1), a fixing plate (22) for mounting the workpiece, a test rod (23) arranged on the base (21), and a limit ring (24) coaxially arranged at one end of the test rod (23), wherein the limit ring (24) and the workpiece are respectively located on one side of the fixing plate (22), the fixing plate (22) is arranged on the base (21), a grating ruler (8) for measuring displacement is arranged between the base (21) and the test bench (1), and a locking member (5) is arranged between the test rod (23) and the base (21); The output end of the axial loading component (3) can abut against the test rod (23), and the output end of the lateral loading component (4) can abut against the limit ring (24).

2. A bidirectional testing device for a two-axis torque limiter according to claim 1, characterized in that: The axial loading member (3) comprises a first connecting seat (31) arranged on the test bench (1), a first electric cylinder (32) and a first driving motor (33) arranged on the first connecting seat (31), and a first push rod (34) connected to the output end of the first electric cylinder (32), wherein the first push rod (34) is used to abut against the test rod (23), a first torque sensor (6) is provided between the first push rod (34) and the first electric cylinder (32), and the first driving motor (33) is used to drive the first push rod (34) to move.

3. A bidirectional testing device for a two-axis torque limiter according to claim 2, characterized in that: The lateral loading component (4) comprises a second connecting seat (41) arranged on the test bench (1), a second electric cylinder (42) and a second driving motor (43) arranged on the second connecting seat (41), and a second push rod (44) connected to the output end of the second electric cylinder (42), wherein the second push rod (44) is used to abut against a limit ring (24), the axial direction of the second push rod (44) is perpendicular to the axial direction of the first push rod (34), a second torque sensor (7) is arranged between the first push rod (34) and the second electric cylinder (42), and the second driving motor (43) is used to drive the second push rod (44) to move.

4. A bidirectional testing device for a two-axis torque limiter according to claim 3, characterized in that: The grating ruler (8) comprises a first grating displacement sensor (81) arranged on a base (21) and a second grating displacement sensor (82) arranged on a test bench (1), wherein the first grating displacement sensor (81) is arranged directly below the test rod (23), and there are at least two second grating displacement sensors (82), wherein one of the second grating displacement sensors (82) is used to detect an output end of a first electric cylinder (32), and the other second grating displacement sensor (82) is used to detect an output end of a second electric cylinder (42).

5. A bidirectional testing device for a two-axis torque limiter according to claim 1, characterized in that: The locking member (5) comprises a connecting frame (51) arranged on the base (21) and a fixing ring (52) arranged on the connecting frame (51); the test rod (23) and the fixing ring (52) are coaxially arranged, and the test rod (23) is fixed to the inner wall of the fixing ring (52).

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