Tension spring size detection device

Abstract

The tension spring size detection device is applied to the technical field of tension spring production and detection, the top end of a tension spring is hooked on a clamping ring, then a first servo motor is started through a controller according to the length of the clamping spring to drive a first lead screw to rotate, a stress plate is horizontally and vertically moved and adjusted, and after the stress plate is adjusted to a proper height, the first lead screw is driven to rotate. At the moment, a certain distance is reserved between the bottom of the tension spring and the base, then two first electric sliding rails are started at the same time to drive two clamping plates to move close to each other, clamping hooks at the bottom of the tension spring are clamped, clamping of the tension spring can be reinforced through anti-skid pads on the clamping plates, and therefore the tension spring is positioned; at the moment, the distance of the displacement sensor can be adjusted through expansion and contraction of the damping expansion plate so as to correspond to the position of the tension spring, then the second servo motor is started to drive the damping expansion plate to drive the displacement sensor to move upwards, the initial position is located at the top of the tension spring and then move downwards, and the length of the tension spring is calculated through displacement changes.

Description

Technical Field

[0001] This utility model relates to a tension spring testing device, and more particularly to a tension spring size testing device applied in the field of tension spring production testing technology. Background Technology

[0002] Tension springs, as a commonly used elastic element, have wide applications in many fields such as machinery and electronics. The dimensional accuracy of tension springs has a significant impact on their performance and effectiveness; therefore, precise dimensional inspection of tension springs is necessary during the production process.

[0003] Chinese patent CN210953292U discloses a spring testing device. This utility model is simple and convenient to operate, and has low cost. It is especially suitable for verifying product performance and correcting dimensional tolerances on drawings during the R&D stage of tension spring products.

[0004] In the existing technology, the spring is positioned by clamping the hooks at both ends of the spring before testing. However, this pulling method can easily deform the length of the spring and affect the measurement results. Utility Model Content

[0005] The technical problem to be solved by this utility model in view of the above-mentioned prior art is that the spring is positioned by clamping the hooks at both ends of the spring before testing. However, this pulling method can easily deform the length of the spring and affect the measurement results.

[0006] To address the aforementioned problems, this utility model provides a tension spring size detection device, comprising a base, a support plate fixedly connected to the top of the base, a first sliding groove formed on the support plate, a placement groove formed on the support plate directly below the first sliding groove, a first servo motor fixedly connected in the placement groove, a first lead screw rotatably connected to the inner wall of the first sliding groove, and the output end of the first servo motor connected to the first lead screw, a force plate sleeved on the surface of the first lead screw, a retaining ring movably connected to the bottom end of the force plate, a groove formed at the top of the base directly below the force plate, a first electric slide rail symmetrically fixedly connected in the groove, symmetrical clamping plates slidably connected on the first electric slide rail, a third sliding groove formed on the side of the support plate at the first sliding groove, a second lead screw rotatably connected to the top wall of the third sliding groove, a second servo motor fixedly connected to the bottom of the third sliding groove, and the output end of the second servo motor connected to the second lead screw, a damping telescopic plate sleeved on the surface of the second lead screw, and a displacement sensor fixedly connected to the movable side wall of the damping telescopic plate.

[0007] In the above-mentioned testing device, the force plate is adjusted up and down by the first lead screw, which allows the testing device to be adapted to the measurement of tension springs of different lengths. In addition, a clamping plate with anti-slip pads is set to clamp and position the bottom of the tension spring, avoiding the problem of deformation of the tension spring due to poor control of the force when clamping and positioning the two ends of the tension spring in the traditional way, which affects the measurement results.

[0008] As a further improvement of this application, a top groove is provided at the bottom end of the load-bearing plate, and a second sliding groove is symmetrically provided on the inner wall of the top groove, and an electromagnetic block is slidably connected in the second sliding groove.

[0009] As a further improvement to this application, an iron block is embedded in the top wall of the load-bearing plate, and the electromagnetic block and the iron block attract each other.

[0010] As a further improvement of this application, a second electric slide rail is symmetrically fixedly connected to the bottom end of the force plate at the middle of the retaining ring. Two symmetrical sliding plates are slidably connected on the second electric slide rail, and a laser rangefinder is embedded in one end of the two sliding plates close to each other. The two laser rangefinders are a signal transmitter and a signal receiver, respectively.

[0011] As another improvement of this application, anti-slip pads are fixedly connected to one end of each of the two clamps that are close to each other.

[0012] As a further improvement to this application, a controller for controlling the first electric slide rail, the first servo motor, the second servo motor, the second electric slide rail, the laser rangefinder, and the displacement sensor is fixedly connected to the base.

[0013] In summary, the top of the tension spring is hooked onto the retaining ring. Then, based on the length of the retaining spring, the controller activates the first servo motor to drive the first lead screw to rotate, causing the force plate to move horizontally up and down for adjustment. After adjustment to a suitable height, there is a distance between the bottom of the tension spring and the base. Then, the two first electric slide rails are activated simultaneously to move the two clamping plates closer together, clamping the hook at the bottom of the tension spring. The anti-slip pads on the clamping plates further reinforce the clamping of the tension spring, thereby positioning it. At this point, the distance of the displacement sensor can be adjusted by extending and retracting the damping telescopic plate to correspond with the position of the tension spring. Then, the second servo motor is activated to drive the damping telescopic plate to move the displacement sensor upward, so that its initial position is at the top of the tension spring, and then it moves downward. The length of the tension spring is calculated by the displacement change. Attached Figure Description

[0014] Figure 1 This is an isometric view of the detection device according to the first embodiment of this application;

[0015] Figure 2 This is a schematic diagram of the rear side of the detection device according to the first embodiment of this application;

[0016] Figure 3This is a front view of the detection device according to the first embodiment of this application;

[0017] Figure 4 For this application Figure 3 Enlarged view of point A in the middle;

[0018] Figure 5 This is a schematic diagram of the bottom structure of the load-bearing plate according to the second embodiment of this application;

[0019] Figure 6 For this application Figure 5 Enlarged view at point B in the middle;

[0020] Figure 7 This is a schematic diagram of the snap ring and tension spring engaging in the first embodiment of this application.

[0021] Explanation of the labels in the diagram:

[0022] 1. Base; 2. Support plate; 3. First slide groove; 4. First lead screw; 5. Force plate; 6. Snap ring; 7. Groove; 8. First electric slide rail; 9. Clamping plate; 10. Placement slot; 11. First servo motor; 12. Second lead screw; 13. Damping telescopic plate; 14. Second servo motor; 15. Displacement sensor; 16. Slide plate; 17. Top groove; 18. Electromagnetic block; 19. Second slide groove; 20. Laser rangefinder sensor; 21. Second electric slide rail; 22. Third slide groove. Detailed Implementation

[0023] The two embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0024] First implementation method:

[0025] Figures 1-4 and Figure 7A tension spring size detection device is shown, including a base 1, a support plate 2 fixedly connected to the top of the base 1, a first sliding groove 3 formed on the support plate 2, a placement groove 10 formed directly below the first sliding groove 3 on the support plate 2, a first servo motor 11 fixedly connected inside the placement groove 10, a first lead screw 4 rotatably connected to the inner wall of the first sliding groove 3, and the output end of the first servo motor 11 connected to the first lead screw 4, a force-bearing plate 5 sleeved on the surface of the first lead screw 4, a retaining ring 6 movably connected to the bottom end of the force-bearing plate 5, and a groove 7 formed at the top of the base 1 directly below the force-bearing plate 5, the groove 7 containing the spring size detection device. The first electric slide rail 8 is fixedly connected, and symmetrical clamping plates 9 are slidably connected on the first electric slide rail 8. The support plate 2 is located on the side of the first slide groove 3 and has a third slide groove 22. The top wall of the third slide groove 22 is rotatably connected to a second lead screw 12. The bottom of the third slide groove 22 is fixedly connected to a second servo motor 14, and the output end of the second servo motor 14 is connected to the second lead screw 12. A damping telescopic plate 13 is sleeved on the surface of the second lead screw 12. A displacement sensor 15 is fixedly connected to the side wall of the movable end of the damping telescopic plate 13. Anti-slip pads are fixedly connected to the two clamping plates 9 at their respective ends close to each other.

[0026] Working principle: The top of the tension spring is hooked onto the retaining ring 6. Then, according to the length of the retaining spring, the controller starts the first servo motor 11 to drive the first lead screw 4 to rotate, so that the force plate 5 moves up and down horizontally to adjust. After adjusting to a suitable height, there is a distance between the bottom of the tension spring and the base 1. Then, the two first electric slide rails 8 are activated at the same time to drive the two clamping plates 9 to move closer to each other, clamping the hook at the bottom of the tension spring. The anti-slip pads on the clamping plates 9 can reinforce the clamping of the tension spring, thereby positioning the tension spring. At this time, the distance of the displacement sensor 15 can be adjusted by extending and retracting the damping telescopic plate 13 to correspond with the position of the tension spring. Then, the second servo motor 14 is activated to drive the damping telescopic plate 13 to move the displacement sensor 15 upward, so that its initial position is at the top of the tension spring, and then it moves downward. The length of the tension spring is calculated by the displacement change.

[0027] Both the first servo motor 11 and the second servo motor 14 adopt existing technology. Those skilled in the art can select a suitable servo motor from the existing technology for installation, such as MR-JE.

[0028] By adjusting the force plate 5 up and down through the first lead screw 4, the detection device can be adapted to measure springs of different lengths. Furthermore, a clamping plate 9 with anti-slip pads is set to clamp and position the bottom of the spring, avoiding the problem of deformation of the spring due to poor force control when clamping and positioning the two ends of the spring in the traditional way, which affects the measurement results.

[0029] Second implementation method:

[0030] Figures 5-6The bottom of the force plate 5 is shown to have a top groove 17. The inner wall of the top groove 17 is symmetrically provided with a second sliding groove 19. An electromagnetic block 18 is slidably connected in the second sliding groove 19. An iron block is embedded in the top wall of the force plate 5, and the electromagnetic block 18 and the iron block attract each other. The bottom of the force plate 5 is symmetrically fixedly connected to a second electric slide rail 21 at the middle of the retaining ring 6. Two symmetrical sliding plates 16 are slidably connected on the second electric slide rail 21, and a laser range sensor 20 is embedded in one end of the two sliding plates 16 close to each other. The two laser range sensors 20 are the signal transmitting end and the signal receiving end, respectively. A controller for controlling the first electric slide rail 8, the first servo motor 11, the second servo motor 14, the second electric slide rail 21, the laser range sensor 20 and the displacement sensor 15 is fixedly connected on the base 1.

[0031] Working principle: When measuring the outer diameter of the tension spring, the top of the tension spring is engaged with the retaining ring 6 via a hook. At this time, the controller activates the electromagnetic block 18, causing it to attract the iron block on the top wall of the top groove 17. The electromagnetic block 18 moves upward in the second slide groove 19, thereby driving the retaining ring 6 to move upward. This can reinforce the engaged tension spring against the bottom of the force plate 5, preventing it from shaking. Then, the two second electric slide rails 21 are activated simultaneously to drive the two slide plates 16 to move closer to each other and contact the outer wall of the tension spring. At this time, the outer diameter of the tension spring can be measured by the two laser range sensors 20.

[0032] The laser rangefinder 20 uses existing technology, and those skilled in the art can select a suitable laser rangefinder from the existing technology for installation, such as LK-G5000.

[0033] The sliding mechanism of the retaining ring 6 facilitates the disassembly of the tension spring while simultaneously clamping and fixing it in place. Furthermore, the two sliding plates 16 allow for convenient measurement of the outer diameter of the tension spring.

[0034] In light of current practical needs, the above-described embodiments adopted in this application are not limited to this scope of protection. Any changes made within the scope of knowledge possessed by those skilled in the art without departing from the concept of this application still fall within the protection scope of this utility model.

Claims

1. A device for detecting the size of a tension spring, comprising a base (1), characterized in that: The base (1) is fixedly connected to a support plate (2) at its top. The support plate (2) has a first sliding groove (3) and a placement groove (10) located directly below the first sliding groove (3). A first servo motor (11) is fixedly connected inside the placement groove (10). A first lead screw (4) is rotatably connected to the inner wall of the first sliding groove (3), and the output end of the first servo motor (11) is connected to the first lead screw (4). A force plate (5) is sleeved on the surface of the first lead screw (4). A retaining ring (6) is movably connected to the bottom end of the force plate (5). A groove (7) is located directly below the force plate (5) at the top of the base (1). The groove (7) is symmetrically fixedly connected to a first electric slide rail (8), and a symmetrical clamping plate (9) is slidably connected on the first electric slide rail (8). The support plate (2) is provided with a third slide rail (22) on the side of the first slide rail (3). The top wall of the third slide rail (22) is rotatably connected to a second lead screw (12). The bottom of the third slide rail (22) is fixedly connected to a second servo motor (14), and the output end of the second servo motor (14) is connected to the second lead screw (12). A damping telescopic plate (13) is sleeved on the surface of the second lead screw (12). A displacement sensor (15) is fixedly connected to the side wall of the movable end of the damping telescopic plate (13).

2. The device for detecting the size of a tension spring according to claim 1, wherein: The bottom end of the load-bearing plate (5) is provided with a top groove (17), and the inner wall of the top groove (17) is symmetrically provided with a second sliding groove (19), and an electromagnetic block (18) is slidably connected in the second sliding groove (19).

3. The tension spring size detection device according to claim 2, characterized in that: The top wall of the load-bearing plate (5) is embedded with an iron block, and the electromagnetic block (18) attracts the iron block.

4. The device for detecting the size of a tension spring according to claim 1, wherein: The bottom end of the force plate (5) is symmetrically fixedly connected to the second electric slide rail (21) at the middle of the retaining ring (6). Two symmetrical sliding plates (16) are slidably connected on the second electric slide rail (21), and the two sliding plates (16) are close to each other. One end of each plate is embedded with a laser range sensor (20). The two laser range sensors (20) are the signal transmitter and the signal receiver, respectively.

5. The device for detecting the size of a tension spring according to claim 1, wherein: Both of the clamps (9) are fixedly connected to anti-slip pads at one end close to each other.

6. The device for detecting the size of a tension spring according to claim 4, wherein: The base (1) is fixedly connected to a controller that controls the first electric slide rail (8), the first servo motor (11), the second servo motor (14), the second electric slide rail (21), the laser rangefinder (20), and the displacement sensor (15).

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