Detection device for electric power fittings

Abstract

An electric power fitting detection device disclosed by the present invention comprises a detection table, an inclined plate is arranged above the detection table, a support plate is mounted at the lower end of the inclined plate, a guide groove is formed in the inclined plate, a T-shaped groove is formed in the support plate, an interception block is arranged on the rear side of the support plate, and the interception block is mounted on the detection table through an L-shaped connecting rod. A collection box is installed at the upper end of the detection table, a detection frame is arranged above the collection box, a pull hook is rotatably installed at the upper end of the detection frame, a permanent magnet is arranged above the supporting plate, and a driving frame is installed in the collection box and can drive the detection frame and the permanent magnet to move up and down. The device has the beneficial effects that when a worker places a plurality of ball head pull rings on the inclined plate, the ball head pull rings can be automatically subjected to feeding, stretching detection, discharging and other work through the device, the labor intensity of the worker is reduced, and the working efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of electrical fitting testing equipment technology, and more specifically, to a testing device for electrical fittings. Background Technology

[0002] Ball joint rings are a common type of connecting hardware in power systems. They are mainly used to connect insulators and other equipment, playing a role in transmitting mechanical loads and ensuring the safety and reliability of electrical connections. Tensile testing of ball joint rings is to ensure that they will not suddenly break due to being unable to withstand the expected tensile force during actual use, thereby ensuring the safety and reliability of the entire connection system.

[0003] In existing technologies, when performing tensile testing on ball-end pull rings, the position of the ball end of the pull ring is typically limited, and then the pull ring is pulled. The limit value that the ball-end pull ring can withstand is detected by a tension sensor. However, there are some problems in its use. The operator needs to place the ball end in the designated position first, then put the pull ring on it and stretch it. After the test is completed, the ball end is released and the pull ring is removed. Therefore, it is inconvenient to use when conducting large-scale tests, which affects work efficiency. Summary of the Invention

[0004] The purpose of this invention is to solve the problem of low efficiency in tensile testing of ball joint pull rings, and to design a testing device for power fittings.

[0005] To achieve the above objectives, the technical solution of this invention is as follows: a testing device for power fittings, comprising a testing platform, an inclined plate above the testing platform, a support plate installed at the lower end of the inclined plate, a guide groove on the inclined plate, and a T-shaped groove on the support plate, the T-shaped groove and the guide groove being connected; the inclined plate is mounted on the testing platform by multiple fixing rods, the support plate is mounted on the testing platform by multiple support rods, an intercepting block is provided on the rear side of the support plate, the intercepting block is mounted on the testing platform by an L-shaped connecting rod, a collection box is installed at the upper end of the testing platform, a testing frame is provided above the collection box, a hook is rotatably mounted on the upper end of the testing frame, a permanent magnet is provided above the support plate, a drive frame is installed inside the collection box, the permanent magnet is retractably mounted on the drive frame, and the drive frame can drive the testing frame and the permanent magnet to move up and down.

[0006] Furthermore, the drive frame includes a lifting platform located above the testing table. The lifting platform is connected to the upper surface of the testing table via multiple hydraulic telescopic rods, and push platforms are installed on both sides of the lower surface of the lifting platform.

[0007] Furthermore, the detection frame includes a lifting block located above the collection box. The lifting block has guide holes at both ends, and a guide rod is installed in the guide holes. The lower end of the guide rod is installed on the lower inner surface of the collection box, and an intercepting plate is installed on the upper end of the guide rod. The lifting block and the inner surface of the collection box are connected by multiple telescopic springs. A tension sensor is installed on the upper surface of the lifting block, and a holding block is installed on the upper end of the tension sensor. A hook is rotatably installed on the holding block, and the lower end of the push platform can extend to the upper surface of the lifting block.

[0008] Furthermore, a rotating shaft is installed at the lower end of the hook, bearing seats are installed at both ends of the rotating shaft, the lower end of the bearing seats is installed on the holding block, a transmission gear is installed at one end of the rotating shaft, a lifting rack is provided on one side of the transmission gear, and the upper end of the lifting rack is connected to the lower surface of the lifting platform.

[0009] Furthermore, the lifting block has a notch to allow the support rod to pass.

[0010] Furthermore, a support block is installed on one side of the upper end of the holding block, which can support the hook, and a limit plate is installed on one side of the upper end of the hook.

[0011] Furthermore, the support plate has holding slots on both sides of the upper end, and telescopic blocks are placed in the holding slots. One end of the telescopic block extends to the outside of the support plate, and a pulley is installed at the end of the telescopic block located on the outside of the support plate. A reset plate is installed on one side of the lower end of the telescopic block, and a fixing plate is installed on one side of the lower end of the support plate. The reset plate and the fixing plate are connected by a reset spring, and a trapezoidal platform is installed on the inner surface of the push platform.

[0012] Furthermore, a lifting rod is installed on the upper end of the permanent magnet, and a circular sleeve is provided above the lifting rod. The upper end of the circular sleeve is installed on the lower surface of the lifting platform, and the upper end of the lifting rod is connected to the lower surface of the lifting platform through a connecting spring.

[0013] Furthermore, a limiting ring is provided above the permanent magnet, and the lifting rod, the circular sleeve, and the permanent magnet can all pass through the inside of the limiting ring. The limiting ring is installed on the intercepting block through a support shaft. Limiting grooves are opened on both sides of the lifting rod, and limiting blocks are installed on both sides of the lower end of the circular sleeve. One end of the limiting block extends into the limiting groove.

[0014] Furthermore, a vibrator is provided above the testing platform, and the vibrator is mounted on a fixed rod via a connecting plate.

[0015] The beneficial effects of this invention are as follows: When performing tensile testing on ball-head pull rings or similar electrical fittings, the middle position of the ball-head pull ring is placed directly in the guide groove. Under the action of the inclined plate, the ball-head pull ring slides downward and falls onto the support plate. Then, the lower end of the ball-head pull ring is hooked by the rotation of the hook. The drive frame drives the hook to move downward, thereby performing tensile testing on the ball-head pull ring. At the same time, the permanent magnet falls onto the upper end of the ball-head pull ring and attracts it. After the test is completed, the hook rotates in the opposite direction, thereby releasing the ball-head pull ring. The drive frame drives the permanent magnet to move upward, thereby removing the ball-head pull ring and moving the rear ball-head pull ring to the support plate, facilitating the testing of the next ball-head pull ring. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a testing device for power fittings according to the present invention; Figure 2 yes Figure 1 A magnified view of a section at point A in the middle; Figure 3 yes Figure 1 A magnified view of a section at point B in the middle; Figure 4 yes Figure 1 A magnified view of a section at point C; Figure 5 This is a side view schematic diagram of a testing device for power fittings according to the present invention; Figure 6 yes Figure 5 A magnified view of a section at point D; Figure 7 yes Figure 5 A magnified view of a section at point E in the middle; Figure 8 yes Figure 5 A magnified view of a section at point F in the middle; Figure 9 This is a schematic diagram showing the positional relationship between the telescopic block and the T-shaped groove described in this invention; Figure 10 This is a schematic diagram showing the positional relationship between the support rod and the lifting block described in this invention; In the diagram, 1. Testing table; 2. Inclined plate; 3. Support plate; 4. Guide chute; 5. T-shaped chute; 6. Fixed rod; 7. Support rod; 8. Intercepting block; 9. L-shaped connecting rod; 10. Collection box; 11. Testing frame; 12. Hook; 13. Permanent magnet; 14. Drive frame; 15. Lifting platform; 16. Hydraulic telescopic rod; 17. Pushing platform; 18. Lifting block; 19. Guide hole; 20. Guide rod; 21. Intercepting plate; 22. Telescopic spring; 23. Tension sensor; 24. Container. 25. Placement block; 26. Rotating shaft; 27. Bearing seat; 28. Transmission gear; 29. ​​Lifting rack; 30. Notch; 31. Support block; 32. Limiting plate; 33. Holding slot; 34. Telescopic block; 35. Pulley; 36. Reset plate; 37. Fixing plate; 38. Reset spring; 39. Trapezoidal platform; 40. Lifting rod; 41. Circular sleeve; 42. Connecting spring; 43. Limiting ring; 44. Support shaft; 45. Limiting groove; 46. Limiting block; 47. Vibrator; 48. Connecting plate. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] In the description of this invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, in the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0019] This invention provides, for example Figure 1-10The device shown is for testing electrical fittings and includes a testing platform 1. An inclined plate 2 is provided above the testing platform 1. A support plate 3 is installed at the lower end of the inclined plate 2. A guide groove 4 is opened on the inclined plate 2. A T-shaped groove 5 is opened on the support plate 3. The T-shaped groove 5 and the guide groove 4 are connected. The inclined plate 2 is installed on the testing platform 1 by multiple fixing rods 6. The support plate 3 is installed on the testing platform 1 by multiple support rods 7. An intercepting block 8 is provided on the rear side of the support plate 3. The intercepting block 8 is installed on the testing platform 1 by an L-shaped connecting rod 9. A collection box 10 is installed at the upper end of the testing platform 1. A testing frame 11 is provided above the collection box 10. A hook 12 is rotatably installed at the upper end of the testing frame 11. A permanent magnet 13 is provided above the support plate 3. A drive frame 14 is installed inside the collection box 10. The permanent magnet 13 is telescopically installed on the drive frame 14. The drive frame 14 can drive the testing frame 11 and the permanent magnet 13 to move up and down.

[0020] The process of this device for testing electrical fittings is as follows: The operator passes the middle part of the ball-head pull ring through the guide chute 4. The ball head is positioned above the inclined plate 2. Under the action of the inclined plane, the ball-head pull ring slides downwards, causing the lowest ball-head pull ring to land on the support plate 3. Multiple ball-head pull rings can be placed on the inclined plate 2. After the ball-head pull ring lands on the support plate 3, the hook 12 is rotated, causing its upper end to rotate to the inside of the ball-head pull ring. The drive frame 14 drives the testing frame 11 and hook 12 downwards, thus testing the ball-head pull ring. When the drive frame 14 drives the testing frame 11 downwards, it allows the permanent magnet... The permanent magnet 13 moves downwards and stops moving when its lower end contacts the upper end of the ball-head pull ring. After the ball-head pull ring is detected, the permanent magnet 13 is moved upwards by the drive frame 14, which pulls the ball-head pull ring out of the T-shaped groove 5. Then the permanent magnet 13 is separated from the ball-head pull ring, allowing the ball-head pull ring to fall into the collection box 10. If the ball-head pull ring breaks, its lower part falls into the collection box 10, and its upper part moves from the T-shaped groove 5 to above the support plate 3 before separating from the permanent magnet 13. Then the ball-head pull ring on the inclined plate 2 re-enters the support plate 3. The above process is repeated to detect the ball-head pull ring again.

[0021] Refer to the instruction manual appendix Figure 1 Instruction manual attached Figure 3 Instruction manual attached Figure 5 Instruction manual attached Figure 6 Instruction manual attached Figure 7 Included with instruction manual Figure 10 The drive frame 14 includes a lifting platform 15 located above the testing platform 1. The lifting platform 15 is connected to the upper surface of the testing platform 1 through multiple hydraulic telescopic rods 16. Pushing platforms 17 are installed on both sides of the lower surface of the lifting platform 15.

[0022] The process of the drive frame 14 driving the test frame 11 and the permanent magnet 13 to move up and down is as follows: the hydraulic telescopic rod 16 is activated to move up and down, which in turn drives the lifting platform 15 to move up and down. When the lifting platform 15 moves up and down, it can drive the permanent magnet 13 to move up and down. When the lifting platform 15 moves up and down, it can drive the test frame 11 to move up and down by pushing the platform 17.

[0023] Refer to the instruction manual appendix Figure 1 Instruction manual attached Figure 3 Instruction manual attached Figure 5 Included with instruction manual Figure 6 The detection frame 11 includes a lifting block 18 located above the collection box 10. The lifting block 18 has guide holes 19 at both ends, and guide rods 20 are provided in the guide holes 19. The lower end of the guide rods 20 is installed on the lower inner surface of the collection box 10, and the upper end of the guide rods 20 is installed with an intercepting plate 21. The lifting block 18 and the inner surface of the collection box 10 are connected by multiple telescopic springs 22. A tension sensor 23 is installed on the upper surface of the lifting block 18, and a holding block 24 is installed on the upper end of the tension sensor 23. A hook 12 is rotatably installed on the holding block 24, and the lower end of the push platform 17 can extend to the upper surface of the lifting block 18.

[0024] The process of detecting the tension of the testing frame 1 is as follows: When the pushing platform 17 moves downward, the lower end of the pushing platform 17 can contact the upper end of the lifting block 18, thereby pushing the lifting block 18 downward and compressing the telescopic spring 20. The guide rod 20 and the guide hole 19 can ensure the moving direction of the lifting block 18. When the lifting block 18 moves downward, the holding block 24 and the hook 12 can be pulled downward by the tension sensor 23, and the magnitude of the tension can be determined by the tension sensor 23. After the test is completed, the pushing platform 17 moves upward. Under the elastic force of the telescopic spring 22, the lifting block 18 can be pushed back to its original position. The intercepting plate 21 can intercept and position the lifting block 18.

[0025] Refer to the instruction manual appendix Figure 1 Instruction manual attached Figure 3 Instruction manual attached Figure 5 Included with instruction manual Figure 6 A rotating shaft 25 is installed at the lower end of the hook 12. Bearing seats 26 are installed at both ends of the rotating shaft 25. The lower end of the bearing seats 26 is installed on the holding block 24. A transmission gear 27 is installed at one end of the rotating shaft 25. A lifting rack 28 is provided on one side of the transmission gear 27. The upper end of the lifting rack 28 is connected to the lower surface of the lifting platform 15.

[0026] The rotation process of hook 12 is as follows: Under normal conditions, hook 12 is not fitted into the ball head pull ring. When the lifting platform 15 moves downward, it can drive the lifting rack 28 to move downward, which allows the lifting rack 28 to mesh with the transmission gear 27. As the lifting rack 28 continues to move downward, it drives the transmission gear 27, the rotating shaft 25, and hook 12 to rotate. When the upper end of hook 12 rotates to the inside of the ball head pull ring, the lower end of the push platform 17 contacts the lifting block 18. As the lifting platform 15 continues to move downward, the lifting block 18, the holding block 24, the bearing seat 26, the rotating shaft 25, the transmission gear 27, the lifting rack 28, and hook 12 all rotate. Move downwards. At this time, the transmission gear 27 and the lifting rack 28 are relatively stationary, and the rotating shaft 25 and the hook 12 will not rotate. After the test is completed, move the lifting platform 15 upwards, so that the lifting block 18, the holding block 24, the bearing seat 26, the rotating shaft 25, the transmission gear 27, the lifting rack 28, and the hook 12 all move upwards. When the lifting block 18 returns to its original position, the lifting platform 15 and the lifting rack 28 continue to move upwards. Then, through the meshing of the lifting rack 28 and the transmission gear 27, the hook 12 can be rotated back to its original position. When the lifting platform 15 continues to move upwards, the ball head pull ring can be pulled out from the T-shaped groove 5 by the permanent magnet 13.

[0027] Refer to the instruction manual appendix Figure 10 The lifting block 18 has a notch 29 that allows it to avoid the support rod 7, which facilitates the up and down movement of the lifting block 18.

[0028] Refer to the instruction manual appendix Figure 1 Instruction manual attached Figure 2 Included with instruction manual Figure 3 A support block 30 is installed on one side of the upper end of the holding block 24. The support block 30 can support the hook 12. A limit plate 31 is installed on one side of the upper end of the hook 12. After the hook 12 rotates back to its original position, the support block 30 can limit and support the hook 12, which can ensure the position of the hook 12. When the hook 12 rotates to the inside of the ball head pull ring, the limit plate 31 can push the ball head pull ring, which can then rotate the ball head pull ring below the permanent magnet 13 to the position corresponding to the T-shaped groove 5. Then the permanent magnet 13 can fix the ball head pull ring to prevent the ball head pull ring from rotating under the action of external force, which makes it easier for the ball head pull ring to move out of the T-shaped groove 5. The limit plate 31 can also prevent the pull ring from being broken. The pull ring part is fitted on the hook 12, which can facilitate continuous detection.

[0029] Refer to the instruction manual appendix Figure 1 Instruction manual attached Figure 2 Instruction manual attached Figure 5 Instruction manual attached Figure 6 Included with instruction manual Figure 9The support plate 3 has two storage slots 32 on its upper end, and telescopic blocks 33 are placed in the storage slots 32. One end of the telescopic block 33 extends to the outside of the support plate 3. A pulley 34 is installed on the end of the telescopic block 33 located on the outside of the support plate 3. A reset plate 35 is installed on one side of the lower end of the telescopic block 33, and a fixing plate 36 is installed on one side of the lower end of the support plate 3. The reset plate 35 and the fixing plate 36 are connected by a reset spring 37. A trapezoidal platform 38 is installed on the inner surface of the push platform 17. Under normal conditions, the telescopic block 33 is located in one of the storage slots 32. At this time, the telescopic block 33 does not block the T-shaped slot 5. When the lifting platform 15 moves downward, it can drive the push platform 17 and the trapezoidal platform 38 to move downward. When the trapezoidal platform 38 is tilted... When the ball head contacts the pulley 34, the pulley 34 and the telescopic block 33 can be pushed to one side, and one end of the telescopic block 33 can enter another holding groove 32. The ball head can be supported by the telescopic block 33, which can increase the support area. When the telescopic block 33 moves, the reset plate 35 moves and the reset spring 37 is compressed. After the test is completed, the push platform 15 moves upward. When the trapezoidal platform 38 moves above the pulley 34, the telescopic block 33 can be pushed back to its original position under the elastic force of the reset spring 37. The T-shaped groove 5 can be opened to facilitate the removal of the ball head pull ring. The holding groove 32 can also limit the telescopic block 33 to ensure that the telescopic block 33 is in the holding groove 32.

[0030] Refer to the instruction manual appendix Figure 1 Instruction manual attached Figure 4 Instruction manual attached Figure 5 Included with instruction manual Figure 8 A lifting rod 39 is installed on the upper end of the permanent magnet 13. A circular sleeve 40 is provided above the lifting rod 39. The upper end of the circular sleeve 40 is installed on the lower surface of the lifting platform 15. The upper end of the lifting rod 39 is connected to the lower surface of the lifting platform 15 through a connecting spring 41. When the platform 15 moves downward, it can drive the circular sleeve 40, the connecting spring 41, the lifting rod 39, and the permanent magnet 13 to move downward. When the lower end of the permanent magnet 13 contacts the ball head pull ring, the permanent magnet 13 and the lifting rod 39 stop moving and compress the connecting spring 41, which makes it easier for the lifting platform 15 to continue to move downward.

[0031] Refer to the instruction manual appendix Figure 1 Instruction manual attached Figure 4 Instruction manual attached Figure 5 Included with instruction manual Figure 8A limiting ring 42 is provided above the permanent magnet 13. The lifting rod 39, the circular sleeve 40, and the permanent magnet 13 can all pass through the inside of the limiting ring 42. The limiting ring 42 is mounted on the intercepting block 8 via the support shaft 43. Limiting grooves 44 are opened on both sides of the lifting rod 39. Limiting blocks 45 are installed on both sides of the lower end of the circular sleeve 40. One end of the limiting block 45 extends into the limiting groove 44. When the lifting platform 15 moves upward, it can drive the circular sleeve 40, the connecting spring 41, the lifting rod 39, and the permanent magnet 13 to move upward. The permanent magnet 13 can drive the ball head pull ring to move upward. When the upper end of the ball head pull ring moves below the limiting ring 42, the limiting ring 42 can block the ball head pull ring, thereby allowing the lifting rod 39 and the permanent magnet 13 to pass through. After passing through the inner side of the limiting ring 42, the limiting ring 42 can intercept the ball-head pull ring and separate the ball-head pull ring 42 from the permanent magnet 13. The limiting groove 44 and the limiting block 45 can ensure the direction of movement of the lifting rod 39 and the permanent magnet 13 and prevent the lifting rod 39 and the permanent magnet 13 from rotating. When the ball-head pull ring is intercepted, the lifting rod 39 and the permanent magnet 13 can move downward relative to the lifting platform 15. When the uppermost end of the limiting groove 44 moves to the limiting block 45, the limiting block 45 can intercept the lifting rod 39. At this time, the limiting block 45 can pull the lifting rod 39 upward, but the ball-head pull ring cannot move upward, thereby separating the permanent magnet 13 from the ball-head pull ring. The separated ball-head pull ring can fall into the collection box 10.

[0032] Refer to the instruction manual appendix Figure 1 A vibrator 46 is installed above the testing platform 1. The vibrator 46 is mounted on the fixed rod 6 via a connecting plate 47. When the vibrator 46 is started, the inclined plate 2 and the support plate 3 vibrate. Under the action of the vibration force, the ball-head pull ring moves downward along the inclined plane and enters the support plate 3. Since the diameter of the pull ring part of the ball-head pull ring is larger than the diameter of the ball part, when the ball-head pull ring moves, the ball part can make contact and the pull ring part can deflect, which can prevent the pull ring from colliding with the hook. This makes it easier for one end of the hook 12 to enter the pull ring. Under the action of the vibration force, the ball-head pull ring separated from the permanent magnet 13 will not accumulate on the inclined plate 2 and the support plate 3, making it easier for the ball-head pull ring to fall into the collection box 10.

[0033] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A testing device for electrical fittings, comprising a testing platform (1), characterized in that, An inclined plate (2) is provided above the testing platform (1). A support plate (3) is installed at the lower end of the inclined plate (2). A guide groove (4) is opened on the inclined plate (2), and a T-shaped groove (5) is opened on the support plate (3). The T-shaped groove (5) and the guide groove (4) are connected. The inclined plate (2) is installed on the testing platform (1) by multiple fixing rods (6), and the support plate (3) is installed on the testing platform (1) by multiple support rods (7). An intercepting block (8) is provided on the rear side of the support plate (3). The intercepting block (8) is connected by multiple support rods (7). The L-shaped connecting rod (9) is installed on the testing table (1). A collection box (10) is installed on the upper end of the testing table (1). A testing frame (11) is provided above the collection box (10). A hook (12) is rotatably installed on the upper end of the testing frame (11). A permanent magnet (13) is provided above the support plate (3). A drive frame (14) is installed inside the collection box (10). The permanent magnet (13) is telescopically installed on the drive frame (14). The drive frame (14) can drive the testing frame (11) and the permanent magnet (13) to move up and down.

2. The testing device for power fittings according to claim 1, characterized in that, The drive frame (14) includes a lifting platform (15) located above the testing platform (1). The lifting platform (15) is connected to the upper surface of the testing platform (1) through multiple hydraulic telescopic rods (16). Pushing platforms (17) are installed on both sides of the lower surface of the lifting platform (15).

3. The testing device for power fittings according to claim 2, characterized in that, The detection frame (11) includes a lifting block (18) located above the collection box (10). The lifting block (18) has guide holes (19) at both ends. A guide rod (20) is provided in the guide hole (19). The lower end of the guide rod (20) is installed on the lower inner surface of the collection box (10). An interceptor plate (21) is installed on the upper end of the guide rod (20). The lifting block (18) and the inner surface of the collection box (10) are connected by multiple telescopic springs (22). A tension sensor (23) is installed on the upper surface of the lifting block (18). A holding block (24) is installed on the upper end of the tension sensor (23). A hook (12) is rotatably installed on the holding block (24). The lower end of the push platform (17) can extend to the upper surface of the lifting block (18).

4. The testing device for power fittings according to claim 3, characterized in that, The lower end of the hook (12) is equipped with a rotating shaft (25), and the two ends of the rotating shaft (25) are equipped with bearing seats (26). The lower end of the bearing seats (26) is installed on the holding block (24). One end of the rotating shaft (25) is equipped with a transmission gear (27), and a lifting rack (28) is provided on one side of the transmission gear (27). The upper end of the lifting rack (28) is connected to the lower surface of the lifting platform (15).

5. A testing device for power fittings according to claim 4, characterized in that, The lifting block (18) has a notch (29) to allow the support rod (7) to pass.

6. The testing device for power fittings according to claim 4, characterized in that, A support block (30) is installed on one side of the upper end of the holding block (24). The support block (30) can support the hook (12). A limit plate (31) is installed on one side of the upper end of the hook (12).

7. A testing device for power fittings according to claim 2, characterized in that, The support plate (3) has a holding groove (32) on both sides of the upper end. A telescopic block (33) is placed in the holding groove (32). One end of the telescopic block (33) extends to the outside of the support plate (3). A pulley (34) is installed at the end of the telescopic block (33) located outside the support plate (3). A reset plate (35) is installed on one side of the lower end of the telescopic block (33). A fixing plate (36) is installed on one side of the lower end of the support plate (3). The reset plate (35) and the fixing plate (36) are connected by a reset spring (37). A trapezoidal platform (38) is installed on the inner surface of the push platform (17).

8. A testing device for power fittings according to claim 2, characterized in that, The permanent magnet (13) is equipped with a lifting rod (39) at its upper end. A circular sleeve (40) is provided above the lifting rod (39). The upper end of the circular sleeve (40) is installed on the lower surface of the lifting platform (15). The upper end of the lifting rod (39) is connected to the lower surface of the lifting platform (15) through a connecting spring (41).

9. A testing device for power fittings according to claim 8, characterized in that, A limiting ring (42) is provided above the permanent magnet (13). The lifting rod (39), the circular sleeve (40), and the permanent magnet (13) can all pass through the inside of the limiting ring (42). The limiting ring (42) is installed on the intercepting block (8) through the support shaft (43). Limiting grooves (44) are opened on both sides of the lifting rod (39). Limiting blocks (45) are installed on both sides of the lower end of the circular sleeve (40). One end of the limiting block (45) extends into the limiting groove (44).

10. A testing device for power fittings according to claim 1, characterized in that, A vibrator (46) is provided above the testing platform (1), and the vibrator (46) is installed on the fixed rod (6) through the connecting plate (47).

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