Force measurement protection device
By designing a force measurement protection device including voice coil motor, mobile slider, oil-free bushing, guide rod, pressure head and capacitive displacement sensor, the problem of the existing force measurement device lacks mechanical insurance, and controllable and real-time monitoring of pressure tests is achieved, ensuring the safety and accuracy of the test.
Patent Information
- Application Number
- CN202421449661.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-24
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-06-24
AI Technical Summary
The lack of mechanical safety devices in existing force measurement devices in stress testing poses a risk of damaging the subject being tested, especially when testing expensive objects, which can lead to significant losses.
A force measurement protection device is designed, including a voice coil motor, a mobile slider, an oil-free bushing, a guide rod, a pressure head and a capacitive displacement sensor. Through a hard limit rubber and a spring mechanism, controllable and real-time monitoring of pressure tests is achieved.
It effectively avoids damage to the object to be tested, ensures the safety and accuracy of the stress test, and avoids damage caused by exceeding the tolerance limit.
Smart Images
Figure CN222689303U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of force measurement, in particular to a force measurement protection device. Background Art
[0002] In some industrial production testing processes, pressure testing is used to test the service life of the object being tested by repeatedly pressing it.
[0003] However, the existing force measuring devices mainly use a motor with a force sensor, which can obtain pressure data during the entire movement of the device, but there is no mechanical safety device, and protection can only be set in software. When testing expensive objects, there is a risk of damaging the object being tested, resulting in significant losses. Therefore, a force measuring protection device is needed to solve the above technical problems. Utility Model Content
[0004] The main purpose of the utility model is to provide a force measuring protection device, which can effectively solve the technical problems in the background technology.
[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0006] A force measurement protection device comprises a base plate, a motor fixing plate is fixed on the top surface of the base plate, a voice coil motor is fixed on the motor fixing plate, a slide groove is provided on the top surface of the base plate, a linear guide is fixed on the bottom surface of the slide groove, a slider is slidably connected to the linear guide, a movable slide is fixedly connected to the top surface of the slider, two groups of oil-free bushings are provided on the movable slide, a guide rod is movably connected inside the oil-free bushing, a front blocking piece and a rear blocking piece are respectively fixed on opposite sides of the two groups of oil-free bushings, a shoulder is fixed on the guide rod, and a first spring is fixed between the shoulder and the rear blocking piece.
[0007] As a further solution of the utility model, the front blocking piece and the rear blocking piece respectively prevent the shoulder and the first spring from contacting the two groups of oil-free bushings.
[0008] As a further solution of the utility model, a pressure head is fixed to the end of the guide rod, and a fixed limiting sleeve is fixed on the movable slide, and the fixed limiting sleeve fixes the capacitive displacement sensor and is at the same height as the guide rod.
[0009] As a further solution of the utility model, a first fixed block is fixed on the mover of the voice coil motor, the movable slide is fixed on the first fixed block, a second fixed block is fixed on the movable slide, and a second spring is fixed between the first fixed block and the second fixed block.
[0010] As a further solution of the utility model, a groove is opened on the top surface of the base plate on one side of the slide groove, a connecting rod is fixedly connected to the movable slide, a hard limiting rubber is fixed to the end of the connecting rod, and the hard limiting rubber is located in the groove and does not contact the bottom surface of the groove.
[0011] As a further solution of the utility model, when the hard limit rubber moves to the maximum limit value at the end of the groove, the thrust of the voice coil motor is maximum and the guide rod has not yet compressed the first spring to the limit value.
[0012] As a further solution of the utility model, an encoder ruler is fixed on the side wall of the movable slide, an encoder reader is fixed on the top surface of the bottom plate, and the encoder ruler can slide on the outer side wall of the encoder reader.
[0013] The beneficial effects of the utility model are as follows:
[0014] 1. When the voice coil motor drives the slider at the bottom of the movable slide table fixedly connected to the first fixed block to move on the linear guide rail, the hard limit rubber moves synchronously in the groove until it reaches the maximum stroke when it moves to the end of the groove. The thrust of the voice coil motor reaches the maximum, but the first spring on the guide rod has not reached the compression limit value. Therefore, the pressure of the pressure head is controllable and will not cause damage to the object being measured.
[0015] 2. When the guide rod moves in the oil-free bushing, the pressure generated is different according to the different strokes of the pressure head. The capacitive displacement sensor can accurately measure the displacement distance of the guide rod, and can monitor the pressure provided by the pressure head in real time to prevent it from exceeding the bearing limit of the measured object and causing damage. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the explosion structure of a force measuring protection device of the utility model;
[0017] Figure 2 The utility model is a schematic diagram of the overall structure of a force measuring protection device.
[0018] In the figure: 1. bottom plate; 2. fixed plate; 3. voice coil motor; 4. slide groove; 5. linear guide rail; 6. slider; 7. movable slide; 8. oil-free bushing; 9. guide rod; 10. front blocking plate; 11. rear blocking plate; 12. shoulder; 13. first spring; 14. pressure head; 15. fixed limit sleeve; 16. capacitive displacement sensor; 17. first fixed block; 18. second fixed block; 19. second spring; 20. groove; 21. connecting rod; 22. hard limit rubber; 23. encoder ruler; 24. encoder reader. DETAILED DESCRIPTION
[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.
[0020] like Figure 1-2 As shown, a force measuring protection device comprises a base plate 1, a motor fixing plate 2 is fixed on the top surface of the base plate 1, a voice coil motor 3 is fixed on the motor fixing plate 2, a slide groove 4 is provided on the top surface of the base plate 1, a linear guide rail 5 is fixed on the bottom surface of the slide groove 4, a slider 6 is slidably connected to the linear guide rail 5, a movable slide 7 is fixedly connected to the top surface of the slider 6, two groups of oil-free bushings 8 are provided on the movable slide 7, a guide rod 9 is movably connected inside the oil-free bushing 8, a front blocking piece 10 and a rear blocking piece 11 are respectively fixed on opposite sides of the two groups of oil-free bushings 8, a shoulder 12 is fixed on the guide rod 9, a first spring 13 is fixed between the shoulder 12 and the rear blocking piece 11, the oil-free bushing 8 can reduce the friction between the guide rod 9, thereby reducing wear.
[0021] In this embodiment, the front blocking plate 10 and the rear blocking plate 11 respectively prevent the shoulder 12 and the first spring 13 from contacting the two groups of oil-free bushings 8. Avoiding the contact between the two and the oil-free bushings 8 can reduce the unstable factors caused by friction and improve the positioning accuracy and stability of the guide system.
[0022] In this embodiment, a pressure head 14 is fixed to the end of the guide rod 9, and a fixed limit sleeve 15 is fixed on the movable slide 7. The fixed limit sleeve 15 fixes the capacitive displacement sensor 16 and is at the same height as the guide rod 9. When the guide rod 9 is at the same height, the capacitive displacement sensor 16 can accurately measure the displacement of the guide rod 9, monitor the pressure provided by the pressure head 14 in real time, and avoid exceeding the bearing limit of the object being measured.
[0023] In this embodiment, a first fixed block 17 is fixed on the mover of the voice coil motor 3, the movable slide 7 is fixed on the first fixed block 17, a second fixed block 18 is fixed on the movable slide 7, and a second spring 19 is fixed between the first fixed block 17 and the second fixed block 18. The second spring 19 can make the initial position of the voice coil motor 3 in a contracted state, which usually requires less energy than in the extended state, which can reduce the energy consumption of the system and improve efficiency.
[0024] In this embodiment, a groove 20 is opened on the top surface of the base plate 1 on one side of the slide groove 4, and a connecting rod 21 is fixedly connected to the movable slide 7. A hard limit rubber 22 is fixed to the end of the connecting rod 21. The hard limit rubber 22 is located in the groove 20 and does not contact the bottom surface of the groove 20. Not contacting the bottom surface of the groove 20 can avoid the hard limit rubber 22 from generating friction with its bottom wall when moving, thereby increasing the required energy consumption and possibly causing deviations in the measurement results.
[0025] In this embodiment, when the hard limit rubber 22 moves to the maximum limit value at the end of the groove 20, the thrust of the voice coil motor 3 is maximum and the guide rod 9 has not yet compressed the first spring 13 to the limit value. At this time, the pressure on the pressure head 14 is in a controllable state, which can avoid damage to the object being measured.
[0026] In this embodiment, an encoder ruler 23 is fixed on the side wall of the movable slide 7, and an encoder reader 24 is fixed on the top surface of the base plate 1. The encoder ruler 23 can slide on the outer side wall of the encoder reader 24, so that the stroke of the movable slide 7 can be measured.
[0027] It should be noted that the utility model is a force measurement protection device. When in use, when the voice coil motor 3 drives the slider 6 at the bottom of the movable slide 7 fixedly connected to the first fixed block 17 to move on the linear guide rail 5, the hard limit rubber 22 moves synchronously in the groove 20 until it reaches the maximum stroke when it moves to the end of the groove 20. The thrust of the voice coil motor 3 reaches the maximum, but the first spring 13 on the guide rod 9 has not reached the compression limit value. Therefore, the pressure of the pressure head 14 is in a controllable state and will not cause damage to the object being measured. When the guide rod 9 moves in the oil-free bushing 8, the pressure generated is different according to the different strokes of pushing the pressure head 14, and the capacitive displacement sensor 16 can accurately measure the displacement distance of the guide rod 9, so as to monitor the pressure provided by the pressure head 14 in real time to prevent it from exceeding the bearing limit of the object being measured and causing damage.
[0028] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.
Claims
1. A force measurement protection device, comprising a bottom plate (1), a motor fixing plate (2) being fixed on the top surface of the bottom plate (1), a voice coil motor (3) being fixed on the motor fixing plate (2), characterized in that: The top surface of the bottom plate (1) is provided with a slide groove (4), the bottom surface of the slide groove (4) is fixed with a linear guide rail (5), the linear guide rail (5) is slidably connected with a slider (6), the top surface of the slider (6) is fixedly connected with a movable slide (7), the movable slide (7) is provided with two groups of oil-free bushings (8), the oil-free bushings (8) are movably connected with guide rods (9), the two groups of oil-free bushings (8) are respectively fixed with front blocking plates (10) and rear blocking plates (11) on opposite sides, the guide rod (9) is fixed with a shoulder (12), and a first spring (13) is fixed between the shoulder (12) and the rear blocking plate (11).
2. A force measuring protection device according to claim 1, characterized in that: The front blocking piece (10) and the rear blocking piece (11) respectively prevent the shoulder (12) and the first spring (13) from contacting the two groups of oil-free bushings (8).
3. A force measuring protection device according to claim 1, characterized in that: A pressure head (14) is fixed to the end of the guide rod (9), and a fixed limiting sleeve (15) is fixed on the movable slide (7). The fixed limiting sleeve (15) fixes the capacitive displacement sensor (16) and is at the same height as the guide rod (9).
4. A force measuring protection device according to claim 1, characterized in that: A first fixed block (17) is fixed on the mover of the voice coil motor (3), the movable slide (7) is fixed on the first fixed block (17), a second fixed block (18) is fixed on the movable slide (7), and a second spring (19) is fixed between the first fixed block (17) and the second fixed block (18).
5. A force measuring protection device according to claim 1, characterized in that: A groove (20) is provided on the top surface of the bottom plate (1) at one side of the slide groove (4); a connecting rod (21) is fixedly connected to the movable slide table (7); a hard limit rubber (22) is fixed to the end of the connecting rod (21); the hard limit rubber (22) is located in the groove (20) and does not contact the bottom surface of the groove (20).
6. A force measuring protection device according to claim 5, characterized in that: When the hard limit rubber (22) moves to the maximum limit value at the end of the groove (20), the thrust of the voice coil motor (3) is maximum and the guide rod (9) has not yet compressed the first spring (13) to the limit value.
7. A force measuring protection device according to claim 1, characterized in that: An encoder ruler (23) is fixed on the side wall of the movable slide (7), an encoder reader (24) is fixed on the top surface of the bottom plate (1), and the encoder ruler (23) can slide on the outer side wall of the encoder reader (24).