Mechanism lock performance test device and test method
By designing a locking performance testing device and combining linear drive and worm gear mechanism, the locking performance of the capture mechanism was tested, which solved the problem of inaccurate testing in the existing technology and ensured the successful completion of the docking task.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHANGHAI AEROSPACE EQUIPMENTS MANUFACTURER CO LTD
- Filing Date
- 2026-04-08
- Publication Date
- 2026-07-14
AI Technical Summary
Existing technologies cannot effectively test the locking performance of the capture mechanism, leading to the failure of the spacecraft docking mission.
A mechanism locking performance testing device was designed, including a structural frame, a linear drive mechanism, a worm gear angular displacement mechanism, and a force acquisition device. By simulating the cooperation of the clamping plate and the linear drive mechanism, the docking and separation of the mechanism under test are simulated, and the force value feedback and adjustment are realized.
A simple and reliable testing method is provided, which can simulate actual locking conditions, provide accurate test results, is easy to operate, meets the 10000N load requirement, and ensures the reliability and accuracy of the test.
Smart Images
Figure CN122385158A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to equipment and methods for testing mechanisms, and more particularly to equipment and methods for testing mechanism locking performance. Background Technology
[0002] The capture mechanism is the core component of the docking mechanism. After capturing the passive docking mechanism, the active docking mechanism secures itself to the passive docking mechanism. At this point, the capture mechanism must withstand a force of 10kN without unlocking, which is crucial for the subsequent locking task of the active and passive docking mechanisms. If the capture mechanism fails to lock the passive docking mechanism during the docking mission, the subsequent locking task cannot be performed, resulting in docking mission failure.
[0003] Therefore, the locking performance of the capture mechanism needs to be tested during the production and development process to ensure its locking performance is reliable and meets the functional requirements of the fastening connection of the main and passive docking mechanisms. To verify the locking function of the capture mechanism, a locking performance testing device and method need to be designed to complete the locking performance test. Summary of the Invention
[0004] To address the aforementioned technical problems, the present invention provides a mechanism locking performance testing device, characterized in that it comprises a structural frame 10, a linear drive mechanism 20, a worm gear angular displacement mechanism 30, and a force acquisition device 40. The structural frame 10 includes a base plate 13, a frame 12, and a product mounting plate 15. The frame 12 contains an installation interface for a linear drive mechanism 20. The product mounting plate 15 is fixed to the base plate 13 through bottom mounting holes and is used to mount the product to be tested. The linear drive mechanism 20 includes a linear track 28, a transition block 210, a slider 211, and an angle encoder 24. The linear track 28 is mounted on the structural frame 10. After the transition block 210 and the slider 211 are fixed, they can move on the linear track 28. The angle encoder 24 is used to obtain the current position information of the mechanism under test. The worm gear mechanism 30 includes a worm support 32, a worm gear 35, a worm 34, an adjustment button 31, a support block 33, a simulated clamping device 36, and a simulated clamping device support assembly 37. The worm support 32 is used to mount the worm 34, the support block 33, the adjustment button 31, and the simulated clamping device support assembly 37. The simulated clamping device 36 is connected to the worm support 32 through the simulated clamping device support assembly 37. The simulated clamping device 36 is used to simulate the locking end product state of the mechanism under test. The support assembly 37 is used to install the worm gear 35 and the simulated chuck 36. The worm gear 35 is fastened to the simulated chuck 36. By adjusting the button 31, the worm 34 is rotated, which causes the worm gear 35 connected to the worm 34 to move. Finally, the simulated chuck 36 is adjusted to the target angle for testing. One end of the support block 33 is in contact with the linear guide rail 27, and the other end is mounted on the worm bracket 32. Through the support block 33, the worm gear mechanism 30 can move on the linear guide rail 27. The force acquisition device 40 is installed between the linear drive mechanism 20 and the simulated clamping device 36. The linear drive mechanism 20 is connected to the worm gear mechanism 30 through the force acquisition device 40. It is used to drive the simulated clamping device 36 in the worm gear mechanism 30 to move vertically, simulating the docking and separation of the mechanism under test. When the linear drive mechanism 20 drives the simulated clamping device 36 to move vertically upward, it will generate a contact force with the mechanism under test. The force acquisition device 40 will be stretched, thereby feeding back the force situation of the mechanism under test.
[0005] The present invention also provides a method for testing the locking performance of a mechanism, characterized in that it uses the aforementioned mechanism locking performance testing equipment and includes the following steps: Step 1: Zero out the mechanism locking performance testing equipment and put it in the initial state; Step 2: Adjust the simulated clamping device to a 36° angle so that it is parallel to the force-bearing structure of the mechanism under test, install the mechanism under test, and adjust the mechanism under test to the locked state; Step 3: By controlling the linear drive mechanism 20 to move the simulated chuck 36, the initial positions of the mechanism under test and the simulated chuck 36 are adjusted. Step 4: After finding the initial position, perform a locking force test on the mechanism under test; Step 5: Perform a locking performance test according to the test requirements. First, confirm the angle of the simulated clamp 36, then control the linear drive mechanism 20 to move upward until the simulated clamp 36 contacts the mechanism under test. The force acquisition device 40 will feed back the force value of the mechanism under test. Step 6: When the next working condition needs to be performed, control the linear drive mechanism 20 downward, away from the mechanism under test, reconfirm and / or adjust the angle of the simulated chuck 36, and control the linear drive mechanism 20 to move upward until the simulated chuck 36 contacts the mechanism under test for testing; repeat steps 5 and 6 until the mechanism locking performance test is completed.
[0006] Compared with the prior art, the present invention has the following beneficial effects: This invention closely integrates with the requirements of mechanism performance testing and designs a mechanism locking performance testing device. The device has a simple structure, high reliability, and simple testing process. It can simulate the actual locking conditions of the product and provides strong technical support for the locking performance testing of the mechanism.
[0007] The device of the present invention has a force adjustment function, which can provide a load force of 10,000N and has a wide load force adjustment range; when the load force of the mechanism reaches the predetermined requirement, the entire component can maintain the current state unchanged until the next working condition is tested. Attached Figure Description
[0008] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the overall structure of a mechanism locking performance testing device according to the present invention; Figure 2 This is a schematic diagram of the structural frame of a mechanism locking performance testing device according to the present invention; Figure 3 This is a schematic diagram of a linear drive mechanism for a mechanism locking performance testing device according to the present invention; Figure 4 This is a schematic diagram of a worm gear in a mechanism locking performance testing device according to the present invention; Figure 5 This is a schematic diagram of the mounting plate of a mechanism locking performance testing device according to the present invention; Figure 6 This is a stress and deformation cloud diagram of the mounting plate of a mechanism locking performance testing device according to the present invention after being subjected to 10000N.
[0009] Explanation of reference numerals in the attached figures: 10 - represents the structural frame; 20 - represents the linear drive mechanism; 30 - represents the worm gear mechanism; 40 - represents the force acquisition device; 11- Linear drive mechanism gear protective cover; 12- Frame; 13- Base plate; 14- Handle; 15- Product mounting plate; 21-Driven gear; 22-Driving gear; 23-Reducer; 24-Angle encoder; 25-DC brushless motor; 26-Baffle; 27-Limit sensor; 28-Linear track; 29-Trapezoidal lead screw; 210-Adapter block; 211-Slider; 31-Adjustment button; 32-Worm gear bracket; 33-Support block; 34-Worm gear; 35-Worm wheel; 36-Simulated chuck; 37-Simulated chuck support assembly. Detailed Implementation
[0010] The following is combined with Figures 1-5 This invention will be described in detail below. This will help those skilled in the art to further understand the invention, but it does not limit the invention in any way. It should be noted that those skilled in the art can make several changes and modifications without departing from the concept of the invention. These all fall within the scope of protection of this invention.
[0011] like Figure 1 As shown, a mechanism locking performance testing device provided by the present invention includes a structural frame 10, a linear drive mechanism 20, a worm gear angular displacement mechanism 30, and a force acquisition device 40.
[0012] The structural frame 10 is used to install all components, providing a stable and reliable testing environment for product testing; The linear drive mechanism 20 is connected to the simulated clamp assembly via the force acquisition device 40, and is used to drive the simulated clamp 36 to perform vertical movement, simulating the docking and separation of the mechanism under test; The worm gear angular displacement mechanism 30 is used to change the angular position of the simulated clamping device 36, so as to realize the simulated docking process at different angles; The force acquisition device 40 is installed between the linear drive mechanism 20 and the worm gear mechanism 30. When the linear drive mechanism 20 drives the simulated clamp 36 in the worm gear mechanism 30 to move vertically upward, it comes into contact with the mechanism under test. The force sensor is stretched, thereby feeding back the force situation of the mechanism under test.
[0013] like Figure 2 As shown, the structural frame 10 consists of a base plate 13, a frame 12, a handle 14, and a product mounting plate 15 (see...). Figure 5 It consists of a linear drive mechanism gear protective cover 11, and all the above components are powder-coated and anodized. The structural frame 10 is integrally machined and welded from the base plate 13, frame 12, and handle 14, and also includes mounting interfaces for the linear drive mechanism 20, product mounting plate 15, etc. Product mounting plate 15 is fixed to base plate 13 through bottom mounting holes for mounting the product to be tested; The gear protective cover 11 of the linear drive mechanism is used to prevent foreign objects from entering the gears and avoid affecting the test results and personnel safety.
[0014] Meanwhile, the structure of the product mounting plate 15 is as follows: Figure 5 As shown, it is made of welded aluminum alloy, simulating the actual installation state of the mechanism under test on the whole machine; it can withstand a tensile load of 10000N when the locking performance test of the mechanism under test is performed; the product mounting plate is subjected to 10000N stress and deformation diagram is shown in the figure. Figure 6By eliminating stress singularities, the maximum stress of the structure is approximately 50 MPa, with a deformation of 0.9 mm. The selected aluminum alloy has a tensile strength of approximately 440 MPa, which meets the usage requirements.
[0015] like Figure 3 As shown, the linear drive mechanism 20 consists of a linear track 28, a transition block 210, a slider 211, a limit sensor 27, a DC brushless motor 25, an angle encoder 24, a baffle 26, a reducer 23, a trapezoidal lead screw 29, a drive gear 22, and a driven gear 21. The linear guide rail 28 is mounted on the structural frame 10. After the adapter block 210 and the slider 211 are fixed, they can move on the linear guide rail 28. The limit sensor 27 is mounted on the structural frame 10 to limit the travel of the adapter block 210. The adapter block 210 is equipped with a baffle 26. When the adapter block 210 moves to the limit position, the baffle 26 will reach the limit sensor 27, and the position signal will be transmitted to the motor end to stop the movement. A linear drive mechanism motion control module is formed by a DC brushless motor 25, an angle encoder 24, a reducer 23, a drive gear 22, a driven gear 21, and a trapezoidal lead screw 29. The driven gear 21 is connected to the trapezoidal lead screw 29. By controlling the DC brushless motor and using the reducer 23 to drive the drive gear 22 and the driven gear 21, the trapezoidal lead screw 29 rotates clockwise or counterclockwise. Since one end of the trapezoidal lead screw 29 is connected to the adapter block 210, the clockwise or counterclockwise rotation of the trapezoidal lead screw 29 is ultimately converted into the linear motion of the adapter block 210 on the linear guide 28, moving upward or downward. The current position information of the mechanism under test is obtained using the angle encoder. The linear drive mechanism 20 has a travel range of 0~80mm. like Figure 4 As shown, the worm gear mechanism 30 consists of a worm gear 35, a worm 34, an adjustment button 31, a worm support 32, a support block 33, a simulated chuck 36, and a simulated chuck support assembly 37. The worm gear bracket 32 is used to mount the worm gear 34, the support block 33, the adjustment button 31, and the simulated clamp support assembly 37; the simulated clamp 36 is connected to the worm gear bracket 32 through the simulated clamp support assembly 37. The simulated chuck 36 is used to simulate the locking end product state of the mechanism under test. The simulated chuck support assembly 37 is used to install the worm gear 35 and the simulated chuck 36. At the same time, the worm gear 35 is fastened to the simulated chuck 36. The simulated chuck support components 37 at both ends of the simulated chuck 36 are marked with scale lines, which are used to know the current angle of the simulated chuck 36. The worm gear bracket 32 is used to install the worm gear 34, the support block 33, and the adjustment button 31. One end of the worm gear 34 is connected to the adjustment button 31. The adjustment button 31 drives the worm gear 34 to rotate, thereby causing the worm wheel 35 connected to the worm gear 34 to move. Finally, the simulated chuck 36 is adjusted to the target angle for testing. The adjustment range is within -6° to +6°. One end of the support block 33 contacts the linear guide rail 28, and the other end is mounted on the worm gear bracket 32. Through the support block 33, the worm gear mechanism 30 can move on the linear guide rail 28.
[0016] like Figure 3 , Figure 4 As shown, one end of the force acquisition device 40 is connected to the adapter block 210 in the linear drive mechanism 20, and the other end is connected to the simulated clamping device assembly in the worm gear 30. After the simulated clamping device 37 is adjusted to the correct angle, when the linear drive mechanism 20 drives the adapter block 210 to move, the force acquisition device 40 and the simulated clamping device assembly move up and down synchronously, thereby simulating the docking and separation states of the mechanism under test. When the linear drive mechanism 20 drives the simulated clamping device assembly to move vertically upward and make contact with the mechanism under test, the force acquisition device 40 will provide feedback on the force situation of the mechanism.
[0017] A testing method for a mechanism locking performance testing device includes the following steps: Step 1: Zero out the mechanism locking performance testing equipment and put it in the initial state; Step 2: Adjust the simulated clamping device to a 36° angle so that it is parallel to the force-bearing structure of the mechanism under test, install the mechanism under test, and adjust the mechanism under test to the locked state; Step 3: By controlling the linear drive mechanism 20 to move the simulated chuck 36, the initial positions of the mechanism under test and the simulated chuck 36 are adjusted. Step 4: After finding the initial position, perform a locking force test on the mechanism under test; Step 5: Perform a locking performance test according to the test requirements. First, confirm the angle of the simulated clamp 36, then control the linear drive mechanism 20 to move upward until the simulated clamp 36 contacts the mechanism under test. The force acquisition device 40 will feed back the force value of the mechanism under test. Step 6: When the next working condition needs to be performed, control the linear drive mechanism 20 to move downwards and away from the device under test, reconfirm and / or adjust the angle of the simulated chuck 36, and control the linear drive mechanism 20 to move upwards until the simulated chuck 36 contacts the device under test for testing; Step 7: Repeat steps 5 and 6 until the mechanism locking performance test is completed.
[0018] This invention provides a device and method for testing the locking performance of a mechanism. Its structure is reasonably arranged, which can simulate the actual locking conditions of the product. It has a force value adjustment function, and the test results are accurate and highly reliable. The test process is simple and easy to operate, providing strong technical support for testing the locking performance of mechanisms.
[0019] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.
Claims
1. A device for testing the locking performance of a mechanism, characterized in that, It includes a structural frame (10), a linear drive mechanism (20), a worm gear angular displacement mechanism (30), and a force acquisition device (40). The structural frame (10) includes a base plate (13), a frame (12), and a product mounting plate (15). The frame (12) contains an installation interface for a linear drive mechanism (20). The product mounting plate (15) is fixed to the base plate (13) through bottom mounting holes and is used to install the product to be tested. The linear drive mechanism (20) includes a linear track (28), a transition block (210), a slider (211), and an angle encoder (24). The linear track (28) is mounted on the structural frame (10). After the transition block (210) and the slider (211) are fixed, the transition block (210) can move on the linear track (28). The angle encoder (24) is used to obtain the current position information of the mechanism under test. The worm gear mechanism (30) includes a worm wheel (35), a worm (34), an adjustment button (31), a support block (33), a simulated clamp (36), and a simulated clamp support assembly (37). The simulated clamp (36) is used to simulate the locking end product state of the mechanism under test. The simulated clamp support assembly (37) is used to install the worm wheel (35) and the simulated clamp (36). At the same time, the worm wheel (35) is fastened to the simulated clamp (36). The worm (34) is rotated by the adjustment button (31), thereby causing the worm wheel (35) connected to the worm (34) to move. Finally, the simulated clamp (36) is adjusted to the target angle for testing. One end of the support block (33) is in contact with the linear guide rail (27), and the other end is mounted on the worm bracket (32). Through the support block (33), the worm gear mechanism (30) can move on the linear guide rail (27). The force acquisition device (40) is installed between the linear drive mechanism (20) and the simulated clamping device (36). The linear drive mechanism (20) is connected to the simulated clamping device support assembly (37) through the force acquisition device (40) to drive the simulated clamping device (36) to move vertically and simulate the docking and separation of the mechanism under test. When the linear drive mechanism (20) drives the simulated clamping device (36) to move vertically upward, it will have a contact force with the mechanism under test. The force acquisition device (40) will be stretched to reflect the force situation of the mechanism under test.
2. The mechanism locking performance testing equipment as described in claim 1, characterized in that, The structural frame (10) is integrally processed and welded from the base plate (13), frame (12), and handle (14).
3. The mechanism locking performance testing equipment as described in claim 1, characterized in that, The structural frame (10) further includes a gear guard (11) for preventing foreign objects from entering the gear.
4. The mechanism locking performance testing equipment as described in claim 1, characterized in that, The product mounting plate (15) is made of aluminum alloy and simulates the actual installation state of the mechanism under test on the whole machine. It can withstand a tensile load of 10,000N when the mechanism under test is tested for locking performance.
5. The mechanism locking performance testing equipment as described in claim 1, characterized in that, The linear drive mechanism (20) further includes a limit sensor (27), a brushless DC motor (25), a baffle (26), a reducer (23), a trapezoidal lead screw (29), a drive gear (22), and a driven gear (21). The limit sensor (27) is mounted on the structural frame (10) to limit the travel of the adapter block (210). The baffle (26) is mounted on the adapter block (210). When the adapter block (210) moves to the limit position, the baffle (26) will reach the limit sensor (27), and the position signal will be transmitted to the brushless DC motor to stop moving.
6. The mechanism locking performance testing equipment as described in claim 5, characterized in that, The linear drive mechanism (20) further includes a reducer (23), a trapezoidal lead screw (29), a drive gear (22), and a driven gear (21). The DC brushless motor (25), angle encoder (24), reducer (23), drive gear (22), driven gear (21), and trapezoidal lead screw (29) form a linear drive mechanism motion control module. The driven gear (21) is connected to the trapezoidal lead screw (29). By controlling the DC brushless motor and using the reducer (23) to drive the drive gear (22) and driven gear (21) to move, the trapezoidal lead screw (229) can rotate clockwise or counterclockwise. Since one end of the trapezoidal lead screw (29) is connected to the adapter block (210), the clockwise or counterclockwise rotation of the trapezoidal lead screw (29) is finally converted into the linear motion of the adapter block (210) on the linear guide rail (28) moving upward or downward.
7. The mechanism locking performance testing equipment as described in claim 1, characterized in that, The linear drive mechanism (20) has a travel range of 0~80mm; the target angle of the simulated chuck (36) is adjustable within the range of -6°~+6°.
8. The mechanism locking performance testing equipment as described in claim 1, characterized in that, The worm gear mechanism (30) further includes a worm support (32), which is used to install the worm (34), support block (33), adjustment button (31), and simulated chuck support assembly (37). The simulated chuck (36) is connected to the worm support (32) through the simulated chuck support assembly (37). At the same time, scale lines are marked on the simulated chuck support assembly (37) at both ends of the simulated chuck (36). The scale lines are used to know the current angle of the simulated chuck (36).
9. The mechanism locking performance testing equipment as described in claim 1, characterized in that, One end of the force acquisition device (40) is connected to the adapter block (210) in the linear drive mechanism (20), and the other end is connected to the worm support (32) in the worm gear (30). After the simulated clamping device (37) is adjusted to the correct angle, when the linear drive mechanism (20) drives the adapter block (210) to move, the force acquisition device (40) and the worm support (32) move synchronously, thereby driving the simulated clamping device (36) to move up and down, thus simulating the docking and separation state of the mechanism under test.
10. A method for testing the locking performance of a mechanism, characterized in that, The device used for testing the locking performance of a mechanism according to any one of claims 1 to 9 comprises the following steps: Step 1: Zero out the mechanism locking performance testing equipment and put it in the initial state; Step 2: Adjust the angle of the simulated clamp (36) to be parallel to the force-bearing structure of the mechanism under test, install the mechanism under test, and adjust the mechanism under test to the locked state; Step 3: By controlling the operation of the linear drive mechanism (20), the simulated chuck (36) is driven to move, and the initial positions of the mechanism under test and the simulated chuck (36) are adjusted; Step 4: After finding the initial position, perform a locking force test on the mechanism under test; Step 5: Perform a locking performance test according to the test requirements. First, confirm the angle of the simulated clamp (36), then control the linear drive mechanism (20) to move upward until the simulated clamp (36) contacts the mechanism under test. The force acquisition device (40) will feed back the force value of the mechanism under test. Step 6: When the next working condition needs to be performed, control the linear drive mechanism (20) to move downwards and away from the mechanism under test, reconfirm and / or adjust the angle of the simulated clamp (36), and control the linear drive mechanism (20) to move upwards until the simulated clamp (36) contacts the mechanism under test for testing; repeat steps 5 and 6 until the mechanism locking performance test is completed.