Snap spring sheet bending resilience performance detection equipment

Abstract

The invention discloses equipment for detecting the bending resilience of a snap spring sheet, and relates to the technical field of bending resilience detection. The device comprises a rack, two sets of supporting tables are fixedly installed on the inner top of the rack, a large driving hydraulic cylinder and a small driving hydraulic cylinder are fixedly installed on the top of the rack, a main rod is arranged at the bottom of the telescopic end of the large driving hydraulic cylinder, and an adjusting external thread is formed in the outer side of the main rod; the outer side of the adjusting external thread is in threaded connection with a reference nut, and a laser distance measuring sensor is fixedly installed at the bottom of the reference nut. Through the arrangement of the two driving hydraulic cylinders, the large driving hydraulic cylinder provides main load, the pressing rod provides downward pressure to the middle of the clamping spring piece, the small driving hydraulic cylinder provides auxiliary load, the small driving hydraulic cylinder drives the distance measuring frame to ascend, and the distance measuring frame provides upward driving force to the sleeving and inserting assembly through the connecting rod; the sleeve insertion assembly applies inward bending force to the two ends of the clamp spring sheet, so that the clamp spring sheet is bent under three-point stress, and the test efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of bending rebound detection, and in particular to a device for detecting the bending rebound performance of a clip spring. Background Art

[0002] Automotive brake reeds (also known as brake circlips) are key elastic components in the brake system, widely used to secure and connect the brake disc to the caliper. The reed's bending resilience, defined as its ability to deform and return to its initial state under external forces, is essential for its long-term, stable operation. Inadequate reed resilience can prevent the caliper from fully resetting, or even cause the brakes to bind. In severe cases, this can directly impact the proper functioning of the brake system and threaten driving safety.

[0003] Related technologies can refer to the Chinese invention patent with publication number CN118243529B, which discloses a metal sheet bending rebound performance detection device, including a frame and a controller, a slide rail is provided on the frame, a sliding frame is provided on the slide rail, a rack and a pushing frame are provided on the sliding frame, a discharge frame is provided at one end of the slide rail, and a receiving frame is provided at the other end, a rotating wheel is provided in the frame, a push rod is provided on the rotating wheel, a pressure rod and a pressure sensor are provided at the free end of the push rod, the pressure rod is located above the slide rail, and a driving mechanism is also provided in the frame, and the output end of the driving mechanism is respectively connected to the rotating wheel and the sliding frame, and scanning devices are also provided on the frames on both sides of the pressure rod, and the scanning device, pressure sensor and driving mechanism are all electrically connected to the controller.

[0004] This patent and the prior art have the following technical problems in actual use: Existing technology can only test the bending and rebound properties of a brake reed as a whole. However, in actual testing, there are differences between the overall and localized bending and rebound properties of a brake reed. Different parts of a brake reed (such as its center and edges) may experience different deformation and rebound properties when subjected to external forces. Therefore, simply testing the overall bending and rebound properties of a brake reed cannot fully reflect the localized rebound behavior of the reed. Furthermore, the complex structure and small components of the rebound portion, which plays a key role in the brake reed, make testing difficult. Current testing equipment requires multiple separate tests of the entire and localized brake reed, and cannot simultaneously test both parts, resulting in low testing efficiency. Summary of the Invention

[0005] The purpose of the present invention is to solve the above problems and provide a device for detecting the bending and rebound performance of a clip spring.

[0006] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions: A device for testing the bending and rebound performance of a clip spring comprises a frame, two sets of support platforms are fixedly mounted on the inner bottom of the frame, a large driving hydraulic cylinder and a small driving hydraulic cylinder are fixedly mounted on the top of the frame, a main rod is provided at the bottom of the telescopic end of the large driving hydraulic cylinder, an adjusting external thread is provided on the outer side of the main rod, a reference nut is threadedly connected to the outer side of the adjusting external thread, a laser ranging sensor is fixedly mounted on the bottom of the reference nut, and a pressure rod is rotatably mounted on the bottom of the main rod; The bottom of the telescopic end of the small driving hydraulic cylinder is provided with an auxiliary rod, the bottom of the auxiliary rod is provided with a bottom supporting block, the auxiliary rod is sleeved with a distance measuring frame, the distance measuring frame is sleeved on the main rod, the distance measuring frame is located above the reference nut, the laser ranging sensor is used to measure the distance between the distance measuring frame and the reference nut, the distance measuring frame is located on both sides of the main rod and is hinged with a connecting rod, the bottom end of the connecting rod is installed with a swingable sleeve assembly, the retaining spring can be inserted into the sleeve assembly, a hanging spring is provided between the distance measuring frame and the inner top of the frame, and the elastic force of the hanging spring is the same as the sum of the gravity of the distance measuring frame, the connecting rod and the sleeve assembly.

[0007] Furthermore, the socket assembly includes a swing frame hinged at the bottom end of the connecting rod, a plug hinged on the side of the swing frame close to the rangefinder, a slot is provided inside the plug, a spring can be inserted into the slot, a sliding frame is provided on the top of the plug, and a limiting slider is connected to the internal sliding connection of the sliding frame, and the distance from the rebound part of the spring to the hinge between the swing frame and the connecting rod is greater than the distance from the rebound part of the spring to the hinge between the swing frame and the plug.

[0008] Furthermore, a ranging plate is hinged inside the swing frame, and a hinge block is hinged at the other end of the ranging plate. The hinge block is hinged at the bottom end of the connecting rod. Pin holes are drilled through the inside of the swing frame and the hinge block, and a pin is inserted into the pin hole.

[0009] Furthermore, the opening of the slot is configured to be flared.

[0010] Furthermore, the pressure rod is in an I-shape, and the length of the pressure rod is greater than the length of one end of the plug close to the pressure rod.

[0011] Furthermore, a positioning groove is provided on the top of the support platform, and the positioning groove limits the front end of the spring sheet.

[0012] Furthermore, a lifting screw is fixedly installed on the inner top of the frame, the bottom end of the lifting screw is threadedly connected to a lifting nut, the bottom end of the lifting nut is rotatably installed with a connecting block, and the hanging spring is fixedly connected to the bottom of the connecting block.

[0013] Furthermore, a locking external thread is provided on the outer side of the main rod, the locking external thread is located above the pressure rod, the outer side of the locking external thread is threadedly connected to a locking nut, and the locking nut is located below the adjusting external thread.

[0014] The beneficial effects of the present invention are as follows: 1. The present invention adopts the setting of two driving hydraulic cylinders. The large driving hydraulic cylinder provides the main load and applies downward pressure to the middle of the clip spring through the pressure rod. The small driving hydraulic cylinder provides auxiliary load. The small driving hydraulic cylinder drives the distance measuring frame to rise. The distance measuring frame applies upward driving force to the sleeve assembly through the connecting rod. The sleeve assembly applies inward bending force to both ends of the clip spring, so that the clip spring is subjected to force and bends at three points, thereby improving the test efficiency.

[0015] 2. The present invention uses a large-scale driving hydraulic cylinder to slowly remove the load, so that the spring can rebound more stably. At the same time, a small-scale driving hydraulic cylinder quickly removes the load, so that the distance measuring frame is only supported by the two ends of the spring. By measuring the distance between the distance measuring frame and the reference nut, the rebound angle of the spring can be accurately fed back. The test is simple and the test results are accurate.

[0016] 3. The present invention presses the plug-in part of the sleeve assembly through a pressure rod, and then a small-sized driving hydraulic cylinder provides a local test load. The small-sized driving hydraulic cylinder drives the distance measuring frame to rise, and the distance measuring frame gives the sleeve assembly an upward driving force through the connecting rod. The swinging part of the sleeve assembly presses on the rebound part of the clip spring, thereby realizing the bending rebound performance test of the rebound part, and the test is comprehensive and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the spring clip in the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 3 It is an exploded schematic diagram of the present invention; Figure 4 This is a schematic diagram of the installation position of the pressure rod in the present invention; Figure 5 It is a structural diagram of the sleeve plug assembly in the present invention; Figure 6 yes Figure 5 Explosion diagram.

[0018] Figure numerals: 1. Frame; 11. Lifting screw; 12. Lifting nut; 13. Connecting block; 14. Hanging spring; 2. Support platform; 21. Positioning slot; 3. Large driving hydraulic cylinder; 31. Adjusting external thread; 32. Reference nut; 33. Laser ranging sensor; 34. Pressure rod; 35. Locking external thread; 36. Locking nut; 4. Small driving hydraulic cylinder; 41. Bottom support block; 5. Distance measuring frame; 6. Connecting rod; 7. Socket assembly; 71. Plug; 72. Slot; 73. Slide frame; 74. Limiting slider; 75. Swing frame; 76. Distance measuring plate; 77. Hinge block; 78. Pin; 101. Reed plate body; 102. Rebound part. DETAILED DESCRIPTION

[0019] To make the objectives, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0020] like Figure 1 The figure shows the spring clip to be tested in the present invention, including a spring clip body 101 and two rebound parts 102. The outer contour of the spring clip body 101 is roughly U-shaped, and the two rebound parts 102 are arranged on both sides of one end of the spring clip body 101 away from the U-shaped opening. The details are not repeated here.

[0021] Example like Figures 1-6 As shown, a device for testing the bending and rebound properties of a clip spring comprises a frame 1, two sets of support platforms 2 are fixedly mounted on the inner bottom of the frame 1, a large driving hydraulic cylinder 3 and a small driving hydraulic cylinder 4 are fixedly mounted on the top of the frame 1, a main rod is fixedly connected to the bottom of the telescopic end of the large driving hydraulic cylinder 3, an adjusting external thread 31 is formed on the outer side of the main rod, a reference nut 32 is threadedly connected to the outer side of the adjusting external thread 31, a laser ranging sensor 33 is fixedly mounted on the bottom of the reference nut 32, and a pressure rod 34 is rotatably mounted on the bottom of the main rod; The bottom of the telescopic end of the small driving hydraulic cylinder 4 is fixedly connected to a sub-rod, and a bottom supporting block 41 is installed at the bottom of the sub-rod. A distance measuring frame 5 is sleeved on the sub-rod, and the distance measuring frame 5 is sleeved on the main rod. The distance measuring frame 5 is located above the reference nut 32. The laser ranging sensor 33 is used to measure the distance between the distance measuring frame 5 and the reference nut 32. The distance measuring frame 5 is located on both sides of the main rod and is hinged with a connecting rod 6. The bottom end of the connecting rod 6 is installed with a swingable socket assembly 7, and a spring can be inserted into the socket assembly 7. A hanging spring 14 is provided between the distance measuring frame 5 and the top of the frame 1. The elastic force of the hanging spring 14 is the same as the sum of the gravity of the distance measuring frame 5, the connecting rod 6 and the socket assembly 7.

[0022] The plug-in assembly 7 includes a swing frame 75 hinged at the bottom end of the connecting rod 6. The swing frame 75 is hinged to the plug 71 on the side close to the rangefinder frame 5. A slot 72 is provided inside the plug 71, and a spring can be inserted into the slot 72. A slide frame 73 is fixedly installed on the top of the plug 71. The slide frame 73 is internally slidably connected to a limit slider 74. The distance from the hinge of the swing frame 75 and the connecting rod 6 to the rebound portion 102 is greater than the distance from the hinge of the swing frame 75 and the plug 71 to the rebound portion 102.

[0023] A distance measuring plate 76 is hinged inside the swing frame 75, and a hinge block 77 is hinged at the other end of the distance measuring plate 76. The hinge block 77 is hinged at the bottom end of the connecting rod 6. Pin holes are formed through the inside of the swing frame 75 and the hinge block 77, and a pin 78 is inserted into the inside of the pin hole.

[0024] The detection steps of the present invention are as follows: Clamping: Figure 1 The spring clip is placed on two sets of support platforms 2, and then the two plugs 71 are respectively inserted into the two sides of the spring clip body 101, so that the rebound part 102 is located in the swing frame 75 and above the ranging plate 76, thereby completing the clamping.

[0025] Overall bending rebound detection: rotate the pressure rod 34 to set the pressure rod 34 longitudinally, and the limit slider 74 slides toward the swing frame 75, so that the limit slider 74 blocks and presses the swing frame 75. At this time, no swing occurs between the swing frame 75 and the plug 71. Then control the large driving hydraulic cylinder 3 to operate, the large driving hydraulic cylinder 3 drives the main rod to descend, and the main rod drives the pressure rod 34 to descend. When the pressure rod 34 is pressed in the middle of the clip spring body 101, the large driving hydraulic cylinder 3 stops running, and then rotate the reference nut 32 to press the reference nut 32 against the bottom of the distance measuring frame 5 to complete the reference adjustment; then control The large driving hydraulic cylinder 3 and the small driving hydraulic cylinder 4 operate simultaneously. The large driving hydraulic cylinder 3 applies downward pressure to the clip spring body 101 through the pressure rod 34, applying the main load, while the small driving hydraulic cylinder 4 drives the auxiliary rod to rise, and the auxiliary rod drives the distance measuring frame 5 to move upward through the bottom supporting block 41. The distance measuring frame 5 drives the connecting rod 6 to rise, and the connecting rod 6 gives the overall driving force to the sleeve plug assembly 7. The sleeve plug assembly 7 gives the bending driving force from both sides of the clip spring body 101 to the middle through the plug 71. The clip spring body 101 is driven by three-point bending, which can more efficiently complete the bending of the clip spring body 101; When the spring body 101 bends 10°, the small driving hydraulic cylinder 4 quickly removes the load and the auxiliary rod drops quickly. At this time, the distance measuring frame 5 is only supported by the spring, and the large driving hydraulic cylinder 3 slowly removes the load to stabilize the spring reset. When the pressure rod 34 rises to the reference adjustment position, the pressure rod 34 stops rising. At this time, if the spring rebound amount does not meet the standard, the two ends of the spring body 101 will bend upward, and the distance measuring frame 5 will be pushed up by the sleeve assembly 7 and the connecting rod 6. A distance is formed between the distance measuring frame 5 and the reference nut 32, and the distance is detected by the laser ranging sensor 33. Then, the corresponding bending angle is calculated according to the trigonometric function mathematical model.

[0026] Bending and rebound detection of the rebound portion 102: After the overall bending and rebound detection, the pressure rod 34 is rotated to make the pressure rod 34 distributed laterally, and then the large driving hydraulic cylinder 3 is controlled to operate, and the large driving hydraulic cylinder 3 drives the pressure rod 34 to descend. The pressure rod 34 presses on the plug 71 to flatten the ends of the clamping spring to ensure that the overall detection does not affect the local detection. Then, the limit slider 74 is pushed to slide, and the limit slider 74 moves away from the swing frame 75. At this time, the swing frame 75 can swing relative to the plug 71, and the reference nut 32 is rotated to make the reference nut 32 close to the bottom of the distance measuring frame 5 to complete the reference positioning; Then control the small driving hydraulic cylinder 4 to run at the same time, the small driving hydraulic cylinder 4 drives the auxiliary rod to rise, the auxiliary rod drives the distance measuring frame 5 to move up through the bottom supporting block 41, the distance measuring frame 5 drives the connecting rod 6 to rise, and the connecting rod 6 drives the swing frame 75 to swing upward through the hinge block 77, and the swing frame 75 presses the rebound part 102 upward. Since the distance from the hinge of the swing frame 75 and the connecting rod 6 to the rebound part 102 of the clip spring is greater than the distance from the hinge of the swing frame 75 and the plug 71 to the rebound part 102 of the clip spring, it can achieve a labor-saving effect, so that the small driving hydraulic cylinder 4 can stably press the rebound part 102. After bending to a certain angle, the small driving hydraulic cylinder Slowly remove the load until it descends to the reference position and the swing frame 75 swings to the level with the plug 71. Finally, push the limit slider 74 to lock the swing frame 75, pull out the latch 78, and separate the hinge block 77 from the swing frame 75. Then, gently push the distance frame 5 up by hand. The distance frame 5 drives the connecting rod 6 to rise, and the connecting rod 6 drives the hinge block 77 to rise. The hinge block 77 drives the distance plate 76 to swing upward. When the distance plate 76 swings to the rebound portion 102, a gap is formed between the distance frame 5 and the reference nut 32. The gap is detected by the laser distance sensor 33, and the corresponding bending angle is calculated according to the trigonometric function mathematical model.

[0027] Therefore, the present invention can complete the bending and rebound performance detection of the spring body 101 and the rebound part 102 at one time, the detection is comprehensive, and only one laser ranging sensor 33 is needed to complete all data detection, the detection system is simple, and the measurement is reliable.

[0028] As an embodiment of the present invention, the opening of the slot 72 is expanded. This design facilitates the insertion of the plug 71 into the spring clip.

[0029] As an embodiment of the present invention, the pressing rod 34 is in an I-shape, and the length of the pressing rod 34 is greater than the length of the end of the plug close to the pressing rod 34. Through this design, the pressing rod 34 can stably press the plug 71.

[0030] As an embodiment of the present invention, a positioning groove 21 is provided on the top of the support platform 2. The positioning groove 21 limits the front end of the spring clip. Through this design, the spring clip can be positioned more conveniently.

[0031] Furthermore, a lifting screw 11 is fixedly installed on the inner top of the frame 1, the bottom end of the lifting screw 11 is threadedly connected to a lifting nut 12, the bottom end of the lifting nut 12 is rotatably installed with a connecting block 13, and a hanging spring 14 is fixedly connected to the bottom of the connecting block 13.

[0032] After the load is removed, the gravity of the distance measuring frame 5, the connecting rod 6 and the sleeve plug assembly 7 is applied to the retaining spring. Excessive gravity will flatten the retaining spring and affect the measurement. Therefore, the setting of the hanging spring 14 can balance the gravity of the distance measuring frame 5, the connecting rod 6 and the sleeve plug assembly 7, eliminate the influence of gravity on the measurement results, and improve the measurement accuracy.

[0033] Since the width of the retaining spring is different, the reference position of the distance measuring frame 5 is also different. Therefore, in order to ensure that the hanging spring 14 will not be compressed or stretched, the lifting nut 12 is rotated according to the reference position of the distance measuring frame 5. The lifting nut 12 is lifted and lowered under the action of the lifting screw 11. The lifting nut 12 drives the connecting block 13 to lift and lower, changing the distance between the connecting block 13 and the distance measuring frame 5, so that the hanging spring 14 is maintained at a stable length and will not be compressed or stretched, and the gravity balance is more stable.

[0034] As an embodiment of the present invention, a locking external thread 35 is provided on the outer side of the main rod, and the locking external thread 35 is located above the pressure rod 34. The outer side of the locking external thread 35 is threadedly connected to a locking nut 36, and the locking nut 36 is located below the adjusting external thread 31.

[0035] After the angle adjustment of the pressure rod 34 is completed, the locking nut 36 is screwed down, and the locking nut 36 is tightly pressed on the pressure rod 34, locking the pressure rod 34 through friction, preventing the pressure rod 34 from changing its angle during the detection process, and improving the detection stability.

[0036] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for detecting the bending and rebound properties of a clip spring, comprising a frame (1), characterized in that: Two sets of support platforms (2) are fixedly mounted on the inner bottom of the frame (1), a large driving hydraulic cylinder (3) and a small driving hydraulic cylinder (4) are fixedly mounted on the top of the frame (1), a main rod is provided at the bottom of the telescopic end of the large driving hydraulic cylinder (3), an adjusting external thread (31) is provided on the outside of the main rod, a reference nut (32) is connected to the outer thread of the adjusting external thread (31), a laser distance sensor (33) is fixedly mounted on the bottom of the reference nut (32), and a pressure rod (34) is rotatably mounted on the bottom of the main rod; The telescopic end bottom of the small driving hydraulic cylinder (4) is provided with a secondary rod, the bottom of the secondary rod is provided with a bottom support block (41), a distance measuring frame (5) is sleeved on the secondary rod, the distance measuring frame (5) is sleeved on the main rod, the distance measuring frame (5) is located above the reference nut (32), a laser distance measuring sensor (33) is used to measure the distance between the distance measuring frame (5) and the reference nut (32), the distance measuring frame (5) is located on both sides of the main rod and is hinged with a connecting rod (6), the bottom end of the connecting rod (6) is installed with a swingable sleeve assembly (7), and a spring can be inserted into the sleeve assembly (7); a hanging spring (14) is provided between the distance measuring frame (5) and the inner top of the frame (1), and the elastic force of the hanging spring (14) is the same as the sum of the gravity of the distance measuring frame (5), the connecting rod (6) and the sleeve assembly (7).

2. The device for detecting bending and rebound properties of a clip spring according to claim 1, characterized in that: The sleeve plug assembly (7) includes a swing frame (75) hinged at the bottom end of the connecting rod (6), a plug (71) is hinged on one side of the swing frame (75) close to the distance measuring frame (5), a slot (72) is provided inside the plug (71), and a spring can be inserted into the slot (72), a slide frame (73) is provided on the top of the plug (71), and the interior of the slide frame (73) is slidably connected to a limit slider (74), and a distance from the rebound portion (102) of the spring to the hinged portion between the swing frame (75) and the connecting rod (6) is greater than a distance from the rebound portion (102) of the spring to the hinged portion between the swing frame (75) and the plug (71).

3. The device for detecting bending and rebound properties of a clip spring according to claim 2, characterized in that: The interior of the swing frame (75) is hinged with a distance measuring plate (76), and the other end of the distance measuring plate (76) is hinged with a hinge block (77). The hinge block (77) is hinged to the bottom end of the connecting rod (6). Pin holes are provided through the interior of the swing frame (75) and the hinge block (77), and a latch (78) is inserted into the interior of the pin hole.

4. The device for detecting bending and rebound properties of a clip spring according to claim 3, characterized in that: The opening of the slot (72) is configured to be flared.

5. The device for detecting bending and rebound properties of a clip spring according to claim 4, characterized in that: The pressure rod (34) is in an I-shape, and the length of the pressure rod (34) is greater than the length of one end of the plug (71) close to the pressure rod (34).

6. The device for detecting bending and rebound properties of a clip spring according to claim 1, characterized in that: A positioning groove (21) is provided on the top of the support platform (2), and the positioning groove (21) limits the front end of the clip spring.

7. The device for detecting bending and rebound properties of a clip spring according to claim 1, characterized in that: A lifting screw (11) is fixedly mounted on the inner top of the frame (1), a lifting nut (12) is threadedly connected to the bottom end of the lifting screw (11), a connecting block (13) is rotatably mounted on the bottom end of the lifting nut (12), and a hanging spring (14) is fixedly connected to the bottom of the connecting block (13).

8. The device for detecting bending and rebound properties of a clip spring according to claim 1, characterized in that: The outer side of the main rod is provided with a locking external thread (35), which is located above the pressure rod (34). The outer side of the locking external thread (35) is threadedly connected to a locking nut (36), which is located below the adjusting external thread (31).

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