A test device for testing performance of an elevator safety gear

Abstract

The test device for testing the performance of the elevator safety gear belongs to the technical field of elevator testing, and comprises a test car, a trigger rope group and an accelerating lifting device. The trigger rope group is provided with two parallel synchronous ring groups and action ring groups. The safety gear trigger rod is arranged on the synchronous ring group, and the sleeve is arranged on the action ring group. Before the test car reaches the safety gear trigger speed, the synchronous ring group and the test ring group are in a disengaged state. After the test car reaches the predetermined test speed, the synchronous ring group and the action ring group are in an engaged state, and the sleeve acts, so that the sleeve does not need to be installed at a set height at a set distance, the convenience of sleeve debugging is improved, one end of the second cable of the accelerating lifting device is fixed on the test device, the other end is fixed on a detachable clamp, and a first movable pulley is arranged in the middle, so that the test car can be accelerated at twice the speed by the weight of the first counterweight, and the height of the test device is reduced.

Description

Technical Field

[0001] This invention relates to the field of elevator testing technology, and more specifically to a test device for testing the performance of elevator safety clamps. Background Technology

[0002] Elevator free-fall tests are typically conducted inside an elevator test tower, requiring the car to be raised to the test height before the free-fall test. With the development of high-speed elevators, the rated operating speed of their safety brakes has become 8 m / s. However, to test the performance of the safety brakes, the test tower height often needs to be 25 meters. To address this, existing technologies, such as patent document 1 (CN119976563A), disclose a progressive safety brake free-fall test triggering device and method. Addressing the issue of the safety brake sleeve needing to be installed at a relatively high position for easy adjustment, this method uses a blocking part to allow the sleeve to be positioned at a lower level. This does not reduce the height of the test tower, and the elevator car also reaches the rated speed... This requires a relatively high distance followed by free fall to achieve the desired effect. Furthermore, the arrangement of the sleeves still needs manual adjustment, as does the clamping degree of the sleeves, which determines the resistance to the wire rope. Each test with different wire rope safety clamps requires manual adjustment, and the adjustment force needs to be tested multiple times to achieve the correct result. For example, Patent Document 2 (CN112830360A) discloses a test device and method for elevator car overspeed protection during upward movement. It uses a winch to lift the counterweight to the test height, and then... After reaching the required height, the counterweight is lowered to allow the elevator car to ascend to the speed limited by the safety brake. Although this lifting method can lift the counterweight to the corresponding height more quickly, the upward distance is not reduced when the elevator car reaches the limited speed. Finally, Patent Document 3 (CN119774401A) discloses a test device and method for testing the performance of an elevator speed governor. It uses a traction machine to drive the lifting and lowering of the landing gear, connects the landing gear to the car frame using a release device, and drives the car frame downwards after it reaches the test height using a traction machine. The test speed is adjusted so that the uncoupling device separates from the car frame. While this method can improve the test height, raising the landing gear height via the traction machine requires consideration of wire rope slippage and careful control of the load at both ends of the wire rope. In addition, since the landing gear and car frame are accelerated simultaneously to reach the test speed by the traction machine, an additional braking structure is required after the uncoupling device disengages to brake the landing gear or traction machine. This is to prevent the landing gear from hitting the car frame again after disengagement and affecting the test, which undoubtedly wastes energy and places greater demands on the braking structure.

[0003] In summary, existing technologies for testing the performance of elevator safety gears do not effectively reduce the test height for high-speed elevator safety gears. While using a traction machine or external winch mechanism to quickly raise the test car to the test height saves time and space, it wastes energy and places higher demands on the elevator's braking structure. Furthermore, although the sleeve structure for the safety gear can be positioned relatively low, manual adjustment is still required. The movement of the elevator car is simply controlled by manually adjusting the sleeve's tension. Therefore, this application provides a test device for testing the performance of elevator safety gears that does not require an additional traction machine or winch mechanism to assist the car in reaching the test height or speed, does not require adjustment of the sleeve's installation position, and allows for sleeve tension adjustment without manual intervention. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a test device for testing the performance of elevator safety gear, which includes a test car, an acceleration and lifting device, a trigger rope group, and a sleeve. A safety gear is installed on the test car and connected to the trigger rope group via a safety gear connecting rod. The acceleration and lifting device is connected to the test car. The trigger rope group includes a synchronous ring group and an actuating ring group arranged in parallel. The safety gear connecting rod is disposed on the synchronous ring group, and the sleeve is disposed on the actuating ring group. A sleeve mounting plate is disposed at the bottom of the trigger rope group, and the sleeve is mounted on the sleeve mounting plate. The actuating ring group includes an actuating ring medium, and the sleeve is fixed to the actuating ring medium by static friction. Before the test car accelerates to the test speed, the synchronous ring group and the actuating ring group are in a disengaged state. When the test car accelerates to the required test speed, the synchronous ring group and the actuating ring group are in an engaged state, and the sleeve triggers the safety gear to actuate.

[0005] Preferably, the synchronization ring group includes a synchronization ring medium, a first upper guide wheel assembly, and a first lower guide wheel. The synchronization ring medium is wound between the first upper guide wheel assembly and the first lower guide wheel. The actuation ring group further includes a second upper guide wheel and a second lower guide wheel. The actuation ring medium is wound between the second upper guide wheel and the second lower guide wheel. The first upper guide wheel assembly and the second upper guide wheel are both rotatably mounted on an upper rotating seat. The second lower guide wheel and the first lower guide wheel are both rotatably mounted on a lower support seat. When the synchronization ring group and the actuation ring group are in a disengaged state, the first upper guide wheel assembly can rotate freely relative to the second upper guide wheel. When the synchronization ring group and the actuation ring group are in an engaged state, the first upper guide wheel assembly and the second upper guide wheel rotate synchronously.

[0006] Preferably, when the synchronization ring group and the action ring group are in the disengaged state, the second upper guide wheel is locked inside the upper rotating seat and cannot rotate freely relative to the upper rotating seat. When the synchronization ring group and the action ring group are in the engaged state, the second upper guide wheel is released from the lock of the upper rotating seat and rotates freely relative to the upper rotating seat.

[0007] Preferably, the first upper guide wheel assembly includes a first guide wheel body, a first left support shaft, a first right support shaft, and a throwing block clutch assembly. A throwing block receiving groove is formed on one side of the first guide wheel body, and the throwing block clutch assembly is disposed in the throwing block receiving groove. The first left support shaft is disposed on the side of the first guide wheel body near the throwing block receiving groove, and the first right support shaft is disposed on the other side of the first guide wheel body away from the throwing block receiving groove. The throwing block clutch assembly includes a central retaining cylinder, a first telescopic rod and a second telescopic rod inserted at both ends of the central retaining cylinder. A first throwing block is rotatably disposed at the end of the first telescopic rod away from the central retaining cylinder, and a second throwing block is rotatably disposed at the end of the second telescopic rod away from the central retaining cylinder. A second swing block is rotatably mounted on one end of the interlocking cylinder. A locking hole group is provided on the side of the second upper guide wheel near the first upper guide wheel assembly. Several pin telescopic slots are provided on the side of the first guide wheel body near the second upper guide wheel. A first slidable telescopic pin is provided in the pin telescopic slot. The first pin is pressed against the swing block receiving groove by the first biasing member. When the rotational speed of the first guide wheel body exceeds a certain threshold, the first and second swing blocks are thrown out, so that the first pin overcomes the biasing force of the first biasing member and extends out of the pin telescopic slot, and is locked in the locking hole group, so that the synchronization ring group and the action ring group are in an engaged state.

[0008] Preferably, a pin through hole is provided on the second upper guide wheel, and a pin locking hole is provided on the upper rotating seat. A second pin is slidably disposed in the pin through hole. The second pin is inclined to move closer to the throwing block receiving groove by the action of the second biasing member. A support ring group is also provided on the throwing block clutch assembly. The support ring group is disposed on the first telescopic rod and the second telescopic rod. When the first throwing block and / or the second throwing block is not thrown out, the end of the second pin abuts against the support ring group, and the second upper guide wheel is locked and cannot rotate. After the first throwing block and / or the second throwing block is thrown out, the support ring group is in an expanded state as the first telescopic rod and the second telescopic rod extend. The support ring group no longer abuts against the end of the second pin, and the second upper guide wheel can rotate freely. At the same time, the first pin is also inserted into the locking hole group by the throwing out of the first throwing block and / or the second throwing block. The synchronization ring group and the action ring group engage.

[0009] Preferably, the support ring assembly includes a first support half-ring and a second support half-ring. Both the first and second telescopic rods include a telescopic rod body, and a limiting arc groove is formed on one side of each telescopic rod body. The first support half-ring is engaged in the limiting arc groove of the first telescopic rod, and the second support half-ring is engaged in the limiting arc groove of the second telescopic rod. When the first and / or second throwing blocks are not thrown out, the first and second support half-rings are fitted together to form a complete ring. After the first and / or second throwing blocks are thrown out, the first and / or second telescopic rods slide out from the middle retainer, and the limiting arc groove drives the first and / or second support half-rings to slide outwards, causing the complete ring to separate. The support ring assembly is in the expanded state, and the second offset member drives the second pin to disengage from the pin locking hole.

[0010] Preferably, two rotating slots are provided on the side of the first guide wheel body near the second upper guide wheel. Both the first and second throwing blocks include a throwing block body. A first hinge point is provided at the end of the throwing block body, and a second hinge point is provided in the middle of the throwing block body. The first hinge point of the first throwing block corresponds to one of the two rotating slots, and the first hinge point of the second throwing block corresponds to the other of the two rotating slots. The telescopic rod body is provided with a transition end at the end away from the intermediate clamping cylinder. The transition end of the first telescopic rod corresponds to the second hinge point of the first throwing block, and the transition end of the second telescopic rod corresponds to the second hinge point of the second throwing block. A detachable third offset member is also sleeved on the first and second telescopic rods, or the detachable third offset member is a torsion spring, which is provided on the first hinge point of the first and second throwing blocks.

[0011] Preferably, a counterweight receiving groove is provided on the side of the main body of the first and second throwing blocks that is close to the throwing block receiving groove, and a counterweight passing groove is provided where the main body of the first guide wheel is in contact with the counterweight receiving groove. Different counterweights are inserted into the counterweight receiving groove through the counterweight passing groove, so that the first and second throwing blocks can have different throwing speeds. The counterweight receiving groove is provided at the end of the throwing block main body that is away from the first hinge point.

[0012] Preferably, the accelerating lifting device includes a first fixed pulley, a second fixed pulley, a first movable pulley, a first cable, a second cable, a detachable clamp, a first counterweight, and a second counterweight. The first and second fixed pulleys are fixedly mounted on the top of the test device. The first cable passes around the first and second fixed pulleys, and its two ends are respectively connected to the detachable clamp and the second counterweight. The detachable clamp is detachably connected to the side end of the test car. One end of the second cable is fixedly mounted on the test device, and the other end is fixedly mounted on the detachable clamp. The first movable pulley is wound around the second cable, and the first counterweight is provided at the lower end of the first movable pulley. The test car is accelerated by the first counterweight.

[0013] Preferably, the actuating ring medium and the synchronizing ring medium are belts with internal teeth. The sleeve includes a sleeve body with a passage groove for the belt to pass through. A reduction gear is rotatably disposed within the sleeve body, meshing with the internal teeth. Rotating shafts are disposed at both ends of the reduction gear, which is rotatably disposed within the sleeve body via the rotating shafts. A brake assembly is disposed outside the rotating shafts. By adjusting the clamping force of the brake assembly on the rotating shafts, different resistances are provided by the reduction gear to the movement of the belt.

[0014] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0015] 1. The test device for testing the performance of elevator safety gear of the present invention is configured with two parallel synchronous ring groups and actuating ring groups for the trigger rope group. The safety gear trigger rod is set on the synchronous ring group and the sleeve is set on the actuating ring group. Before the test car reaches the safety gear trigger speed, the synchronous ring group and the test ring group are in a disengaged state. At this time, the sleeve does not decelerate. After the test car reaches the predetermined test speed, the synchronous ring group and the actuating ring group are in an engaged state. At this time, the movement of the test car can be transmitted to the actuating ring group, thereby enabling the sleeve to move and triggering the safety gear. With this configuration, the sleeve does not need to be installed at a set distance and a set height. Operators do not need to worry about working at heights, making the adjustment of the sleeve very convenient. In addition, it can also ensure the safety of personnel operation.

[0016] 2. The test device for testing the performance of elevator safety clamps of the present invention includes an acceleration lifting device. The acceleration lifting device is connected to the test car through a detachable clamp. When the position initialization and speed acceleration of the test car are required, the detachable clamp is connected to the test car. After the test car reaches the predetermined test speed, the detachable clamp can be disengaged from the test car, so as not to affect the free fall test of the test car. In addition, the acceleration lifting device includes a second cable. One end of the second cable is fixed to the test device, and the other end is fixed to the detachable clamp. A first movable pulley is also wound on the second cable. Through the winding of the second cable, the test car is placed at the free end of the movable pulley, so that the weight of the first counterweight can make the test car accelerate at twice the speed of the first counterweight, thereby reducing the height of the entire test device and shortening the acceleration time of the test car.

[0017] 3. The weight difference between the first counterweight and the second counterweight in the acceleration lifting device of the present invention can also be adjusted. By setting a connecting pipeline between the first counterweight and the second counterweight, the first counterweight and the second counterweight are water tanks with suction pumps, thereby realizing a reasonable weight distribution between the first counterweight and the second counterweight. This is to adapt to the need for a relatively heavy first counterweight when the test car is accelerating. After the acceleration lifting device is detached from the test car, a relatively balanced first counterweight and the second counterweight are needed to buffer the inertia of the first counterweight during acceleration and ensure the safe operation of the acceleration lifting device. In addition, when it is necessary to initialize the position of the test car, the weight difference between the first counterweight and the second counterweight can be adjusted to adjust the position of the test car.

[0018] 4. The engagement or disengagement of the synchronization ring group and the action ring group is achieved synchronously by setting a throwing block clutch component in the first upper guide wheel assembly in conjunction with the action of the first pin and the second pin. In the disengaged state, the second upper guide wheel is locked on the upper rotating seat, ensuring that the action ring group does not move. The synchronization ring group rotates with the movement of the test car. After the throwing block of the throwing block clutch component is thrown out, the throwing block can drive the first pin in the first guide wheel body of the first upper guide wheel assembly to extend and lock into the locking hole group of the second upper guide wheel, thereby locking the first upper guide wheel body and the second upper guide wheel. At the same time, after the throwing block of the throwing block clutch component is thrown out, the support ring group on it changes from a contracted state to an extended state. The second pin loses support and disengages from the pin locking hole of the upper rotating seat, allowing the second upper guide wheel to rotate freely relative to the upper rotating seat. Through the above structure, the engagement and disengagement of the synchronization ring group and the action ring group can be achieved accurately and quickly.

[0019] 5. To accommodate different operating speeds of the safety clamp, the throwing block includes a structure that allows for the addition or reduction of counterweights. By setting different counterweight values, different throwing speeds of the throwing block can be quickly achieved. In addition, the actuating ring medium and the synchronizing ring medium are selected as belt structures with internal teeth. At the same time, the sleeve includes a reduction gear with a rotating shaft. By setting a brake assembly on the outer periphery of the rotating shaft, the braking tension can be adjusted. By adjusting the tightness of the brake assembly on the rotating shaft, the deceleration effect of the sleeve can be adjusted. Compared with the existing manual adjustment of the tightness, it can achieve better automation. In addition, the tightness of the brake can be converted into control of the sliding speed of the adjusting belt. Through the above settings, the testing device can not only conduct free fall tests, but also quickly adapt to tests with different operating speeds of the safety clamp. Attached Figure Description

[0020] Figure 1 A simplified structural diagram of the elevator safety clamp performance testing device;

[0021] Figure 2 This is a schematic diagram of the trigger rope assembly structure;

[0022] Figure 3 Schematic diagram for triggering the rope assembly explosion;

[0023] Figure 4 A diagram illustrating the explosion triggered by the rope assembly from another perspective;

[0024] Figure 5 This is a schematic diagram of the explosion of the first upper guide wheel assembly;

[0025] Figure 6 An exploded view of the first upper guide wheel assembly from another perspective;

[0026] Figure 7 This is a schematic diagram of an explosion of a clutch assembly.

[0027] Figure 8 An explosion diagram of the clutch assembly from another perspective;

[0028] Figure 9 This is a schematic diagram of another embodiment of the sleeve;

[0029] Figure 10 for Figure 9 Top view;

[0030] Figure 11 This is a schematic diagram of the brake assembly structure.

[0031] The components include: 1. Test car; 2. Acceleration lifting device; 3. Trigger rope assembly; 4. Sleeve; 5. Synchronization ring assembly; 6. Action ring assembly; 7. Synchronization ring medium; 8. First upper guide wheel assembly; 9. First lower guide wheel; 10. Action ring medium; 11. Second upper guide wheel; 12. Second lower guide wheel; 13. Upper rotating seat; 14. Lower support seat; 15. Sleeve mounting plate; 16. First guide wheel body; 17. First left support shaft; 18. First right support shaft; 19. 20. First pin; 21. Second pin; 22. Sling block receiving groove; 23. Intermediate retainer; 24. First telescopic rod; 25. Second telescopic rod; 26. First sling block; 27. Second sling block; 28. Support ring assembly; 29. ​​First support half ring; 30. Second support half ring; 31. First pawl; 32. Second pawl; 33. Telescopic rod body; 34. Adapter end; 35. One-way ratchet assembly; 36. Limiting arc groove; 37. Sling block Main body; 38. First hinge point; 39. Second hinge point; 40. Pushing groove; 41. Abutting groove; 42. Rotating slot; 43. Pin telescopic slot hole one; 44. Receiving groove; 45. Middle through hole one; 46. Middle through hole two; 47. Pin through hole; 48. Upper horizontal plate; 49. Upper left vertical plate; 50. Upper right vertical plate; 51. Pin locking hole; 52. Lower bottom plate; 53. Lower left vertical plate; 54. Lower right vertical plate; 55. Telescopic cylinder one; 56. Locking 57. Hole group; 58. First cable; 59. Second cable; 60. First counterweight; 61. Second counterweight; 62. First fixed pulley; 63. Second fixed pulley; 64. First movable pulley; 65. Detachable clamp; 66. Safety clamp linkage; 67. Connecting pipe; 68. Sleeve body; 69. Belt; 70. Internal gear; 71. Reduction gear; 72. Through groove; 73. Rotating shaft; 74. Brake; 75. Swing arm; 76. Telescopic cylinder II; 77. Brake assembly. Detailed Implementation

[0032] The present invention will be further described below with reference to embodiments. However, the present invention is not limited to the following embodiments. The implementation conditions used in the embodiments can be further adjusted according to different requirements of specific applications, and the implementation conditions not specified are conventional conditions in the industry. The technical features involved in the various embodiments of the present invention can be combined with each other as long as they do not conflict with each other.

[0033] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0034] Example 1

[0035] like Figures 1-8As shown, a test apparatus for testing the performance of an elevator safety gear includes a test car 1, an acceleration and lifting device 2, a trigger rope group 3, and a sleeve 4. A safety gear is installed on the test car 1, and the safety gear is connected to the trigger rope group 3 via a safety gear connecting rod 65. The acceleration and lifting device 2 is connected to the test car 1 and is used to accelerate the test car 1 to the required test speed. The trigger rope group 3 includes a synchronous ring group 5 and an actuating ring group 6 arranged in parallel. The safety gear connecting rod 65 is disposed on the synchronous ring group 5. The sleeve 4 is mounted on the actuating ring group 6. A sleeve mounting plate 15 is provided at the bottom of the trigger rope group 3. The sleeve 4 is mounted on the sleeve mounting plate 15. The actuating ring group 6 includes an actuating ring medium 10. The sleeve 4 is fixed to the actuating ring medium 10 by static friction. Before the test car 1 accelerates to the required test speed, the synchronizing ring group 5 and the actuating ring group 6 are in a disengaged state. When the test car 1 accelerates to the required test speed, the synchronizing ring group 5 and the actuating ring group 6 are in an engaged state, and the sleeve 4 triggers the safety clamp to operate.

[0036] The synchronization ring group 5 includes a synchronization ring medium 7, a first upper guide wheel assembly 8, and a first lower guide wheel 9. The synchronization ring medium 7 is wound between the first upper guide wheel assembly 8 and the first lower guide wheel 9. The action ring group 6 also includes a second upper guide wheel 11 and a second lower guide wheel 12. The action ring medium 10 is wound between the second upper guide wheel 11 and the second lower guide wheel 12. The first upper guide wheel assembly 8 and the second upper guide wheel 11 are both rotatably mounted on an upper rotating seat 13. The second lower guide wheel 12 and the first lower guide wheel 9 are both rotatably mounted on a lower support seat 14. When the synchronization ring group 5 and the action ring group 6 are in a disengaged state, the first upper guide wheel assembly 8 can rotate freely relative to the second upper guide wheel 11. When the synchronization ring group 5 and the action ring group 6 are in an engaged state, the first upper guide wheel assembly 8 and the second upper guide wheel 11 rotate synchronously. In addition, in order to ensure that the sleeve 4 does not move due to the rotation of the first upper guide wheel assembly 8 when the synchronization ring group 5 and the action ring group 6 are in the disengaged state, the second upper guide wheel 11 is locked in the upper rotating seat 13 and cannot rotate freely relative to the upper rotating seat 13. When the synchronization ring group 5 and the action ring group 6 are in the engaged state, the second upper guide wheel 11 can disengage from the lock of the upper rotating seat 13 and rotate freely relative to the upper rotating seat 13.

[0037] Specifically, such as Figures 3-8As shown, the first upper guide wheel assembly 8 includes a first guide wheel body 16, a first left support shaft 17, a first right support shaft 18, and a slinger clutch assembly 19. A slinger receiving groove 22 is provided on one side of the first guide wheel body 16, and the slinger clutch assembly 19 is disposed in the slinger receiving groove 22. The first left support shaft 17 is disposed on the side of the first guide wheel body 16 near the slinger receiving groove 22, and the first right support shaft 18 is disposed on the other side of the first guide wheel body 16 away from the slinger receiving groove 22. The slinger clutch assembly 19 includes a middle retaining cylinder 23, a first telescopic rod 24 and a second telescopic rod 25 inserted at both ends of the middle retaining cylinder 23. A first slinger 26 is rotatably disposed at the end of the first telescopic rod 24 away from the middle retaining cylinder 23, and a slinger clutch 26 is rotatably disposed at the end of the second telescopic rod 25 away from the middle retaining cylinder 23. A second swing block 27 is rotatably disposed at one end of the intermediate clamping cylinder 23. A locking hole group 56 is disposed on the side of the second upper guide wheel 11 near the first upper guide wheel assembly 8. A plurality of pin telescopic slots 43 are opened on the side of the first guide wheel body 16 near the second upper guide wheel 11. A first pin 20 that can slide and telescopically is disposed in the pin telescopic slot 43. The first pin 20 is pressed against the swing block receiving groove 22 by a first biasing member (such as a spring). When the rotational speed of the first guide wheel body 16 exceeds a certain threshold, the first swing block 26 and the second swing block 27 are thrown out, so that the first pin 20 overcomes the biasing force of the first biasing member and extends out of the pin telescopic slot 43 and is locked in the locking hole group 56, so that the synchronous ring group 5 and the action ring group 6 are in an engaged state.

[0038] A pin through hole 47 is provided on the second upper guide wheel 11, and a pin locking hole 51 is provided on the upper rotating seat 13. A second pin 21 is slidably disposed in the pin through hole 47. The second pin 21 is inclined to move closer to the throwing block receiving groove 22 by the action of the second biasing element (such as a spring). A support ring group 28 is also provided on the throwing block clutch assembly 19. The support ring group 28 is disposed on the first telescopic rod 24 and the second telescopic rod 25. When the first throwing block 26 and / or the second throwing block 27 is not thrown out, the end of the second pin 21 abuts against the support ring group 28, thereby allowing the second pin 21 to be inserted into the pin locking hole 51, realizing that when the synchronous ring group 5 and the action ring group 6 are in a state of separation... When in the engaged state, the second upper guide wheel 11 is locked and cannot rotate, thus ensuring that the sleeve 4 will not be accidentally triggered. After the first swing block 26 and / or the second swing block 27 are thrown out, the support ring assembly 28 is in an expanded state as the first telescopic rod 24 and the second telescopic rod 25 extend. The support ring assembly 28 no longer abuts the end of the second pin 21. At this time, the second pin 21 is no longer stuck in the pin locking hole 51 of the upper rotating seat 13 due to the action of the second offset member, realizing the free rotation of the second upper guide wheel 11. At the same time, the first pin 20 is also inserted into the locking hole assembly 56 due to the throwing out of the first swing block 26 and / or the second swing block 27, realizing the engagement of the synchronization ring assembly 5 and the action ring assembly 6.

[0039] The support ring assembly 28 includes a first support half-ring 29 and a second support half-ring 30. The first telescopic rod 24 and the second telescopic rod 25 have the same structure, both including a telescopic rod body 33. A limiting arc groove 36 is formed on one side of the telescopic rod body 33. The first support half-ring 29 is engaged in the limiting arc groove 36 of the first telescopic rod 24, and the second support half-ring 30 is engaged in the limiting arc groove 36 of the second telescopic rod 25. When the first throwing block 26 and / or the second throwing block 27 are not thrown out, the first support half-ring 29 and the second support half-ring 30 fit together to form a complete ring, so that when the first guide wheel body 16 rotates, it can always provide a stable support for the second pin 21, so that the second pin 21 can always overcome the force of the second offset member and be engaged in the pin locking hole 51. After the first throwing block 26 and / or the second throwing block 27 are thrown out, the first telescopic rod 24 and / or the second telescopic rod 25 slide out from the middle retainer 23, and drive the first support half ring 29 and / or the second support half ring 30 to slide outward through the limiting arc groove 36, thereby causing the complete ring to separate, the support ring group 28 to be in the expanded state, the second pin 21 loses support, and the second biasing member drives the second pin 21 to disengage from the pin locking hole 51.

[0040] Two rotating slots 42 are also provided on the side of the first guide wheel body 16 near the second upper guide wheel 11. The first throwing block 26 and the second throwing block 27 have the same structure, both including a throwing block body 37. A first hinge point 38 is provided at the end of the throwing block body 37, and a second hinge point 39 is provided in the middle of the throwing block body 37. The first hinge point 38 of the first throwing block 26 corresponds to one of the two rotating slots 42, and the first hinge point 38 of the second throwing block 27 corresponds to the other of the two rotating slots 42. The telescopic rod body 33 is also provided with a transition end 34 at the end away from the intermediate clamping cylinder 23. The transition end 34 of the first telescopic rod 24 is connected to the first... The second hinge point 39 of the first throwing block 26 corresponds to the second hinge point 39 of the second telescopic rod 25. A detachable third biasing component (such as a spring) is also sleeved on the first telescopic rod 24 and the second telescopic rod 25. This component can prevent the first throwing block 26 and the second throwing block 27 from being thrown out when the rotation of the first guide wheel body 16 does not exceed a certain speed. Of course, the detachable third biasing component can also be a torsion spring, which is set on the first hinge point 38 of the first throwing block 26 and the second throwing block 27. The specific structure of the third biasing component is not shown in the figure. It is common knowledge in the field and will not be described in detail here.

[0041] In addition, to ensure that the sleeve 4 can continue to operate after the first swing block 26 and the second swing block 27 are thrown out, i.e. after the safety clamp reaches the trigger speed, a one-way ratchet assembly 35 is provided on one side of the telescopic rod body 33. A first pawl 31 and a second pawl 32 are respectively rotatably provided at both ends of the intermediate clamp 23. The first pawl 31 and the second pawl 32 can be tightly attached to the one-way ratchet assembly 35 by a fourth biasing member (such as a spring or torsion spring, not shown in the figure). When the first telescopic rod 24 and / or the second telescopic rod 25 slide out of the intermediate clamp 23, the first pawl 31 and / or the second pawl 32 can overcome the fourth biasing member and rotate outward. When the first telescopic rod 24 and / or the second telescopic rod 25 has a tendency to slide inward into the intermediate clamp 23, the first pawl 31 and / or the second pawl 32 are pressed and locked by the fourth biasing member and locked in the one-way ratchet assembly 35, preventing the first telescopic rod 24 and / or the second telescopic rod 25 from sliding inward into the intermediate clamp 23.

[0042] The intermediate clamping cylinder 23 is provided with a central through hole 45. The central through hole 45 of the intermediate clamping cylinder 23 passes through the first left support rotating shaft 17 and is fixedly installed in the throwing block receiving groove 22. Preferably, a receiving groove 44 is provided at the bottom of the throwing block receiving groove 22. The intermediate clamping cylinder 23 is clamped in the receiving groove 44 so as to better install the intermediate clamping cylinder 23.

[0043] In addition, in order to facilitate the first pin 20 to slide out of the pin telescopic slot 43 after the first and second throwing blocks 26 and 27 are thrown out, a pushing groove 40 is provided on the side of the throwing block body 37 of the first and second throwing blocks 26 and 27 away from the middle retaining cylinder 23, and a corresponding abutting groove 41 is provided at the bottom of the first pin 20. The pushing groove 40 and the abutting groove 41 cooperate to facilitate the first pin 20 to extend out of the pin telescopic slot 43 after the first and second throwing blocks 26 and 27 are thrown out.

[0044] The upper rotating seat 13 includes an upper horizontal plate 48, an upper left vertical plate 49 and an upper right vertical plate 50 disposed at both ends of the upper horizontal plate 48, a pin locking hole 51 opened on the upper left vertical plate 49, a middle through hole 46 opened in the second upper guide wheel 11, the first left support rotating shaft 17 passes through the middle through hole 46 and is rotatably disposed in the upper left vertical plate 49, and the first right support rotating shaft 18 is rotatably disposed in the upper right vertical plate 50.

[0045] The lower support base 14 includes a lower base plate 52, a lower left vertical plate 53 and a lower right vertical plate 54 disposed at both ends of the lower base plate 52. A first left support shaft 17 is also disposed on the side of the first lower guide wheel 9 near the second lower guide wheel 12, and a first right support shaft 18 is also disposed on the other side of the first lower guide wheel 9 away from the second lower guide wheel 12. A second through hole 46 is also opened in the middle of the second lower guide wheel 12. The first left support shaft 17 of the first lower guide wheel 9 passes through the second through hole 46 of the second lower guide wheel 12 and is rotatably disposed in the lower left vertical plate 53. The first right support shaft 18 of the first lower guide wheel 9 is rotatably disposed in the lower right vertical plate 54. In order to allow the sleeve 4 to adapt to the tightness of the actuating ring medium 10 and adjust its position accordingly, the sleeve mounting plate 15 is mounted on the lower base plate 52 by a telescopic cylinder 55.

[0046] Preferably, both the action ring medium 10 and the synchronization ring medium 7 are steel wire ropes.

[0047] like Figure 1 As shown, the accelerating lifting device 2 includes a first fixed pulley 61, a second fixed pulley 62, a first movable pulley 63, a first cable 57, a second cable 58, a detachable clamp 64, a first counterweight 59, and a second counterweight 60. The first fixed pulley 61 and the second fixed pulley 62 are fixedly mounted on the top of the test device. The first cable 57 passes around the first fixed pulley 61 and the second fixed pulley 62 and connects to the detachable clamp 64 and the second counterweight 60 respectively. The detachable clamp 64 is detachably connected to the side of the test car 1. One end of the second cable 58 is fixedly mounted on the test device, and the other end is fixedly mounted on the detachable clamp 64. The first movable pulley 63 is wound around the second cable 58, and the first counterweight 59 is provided at the lower end of the first movable pulley 63. The test car 1 is accelerated by the first counterweight 59. Due to the configuration of the movable pulley structure, when the first counterweight 59 accelerates the test car 1, compared with placing the counterweight directly inside the test car 1, the test car 1 can accelerate at twice the speed, thereby shortening the height of the test device to a certain extent. After the test car 1 accelerates to the predetermined speed, the detachable clamp 64 disengages from the test car 1, thereby putting the test car 1 in a free fall state, achieving the purpose of testing the performance of the safety clamp.

[0048] In addition, in order to ensure the smooth lifting and lowering of the test car 1, the first counterweight 59 and the second counterweight 60, the test device also includes a guide rail (not shown in the figure) to guide its lifting and lowering.

[0049] To ensure smooth lifting, the weight of the second counterweight 60 is equal to the weight of the test car 1. Furthermore, to facilitate acceleration of the test car 1 when the detachable clamp 64 is engaged with it, the weights of the first and second counterweights are balanced after the detachable clamp 64 disengages. This results in the first counterweight 59 being a water tank structure containing a first suction pump, and the second counterweight 60 being a water tank structure containing a second suction pump. The first and second counterweights 59 and 60 are connected by a connecting pipe 66. When the acceleration lifting device 2 needs to accelerate the test car 1, water in the second counterweight 60 is pumped through the connecting pipe 66 by the second suction pump and enters the first counterweight 59, thus accelerating the test car 1 to its destination. At the predetermined speed, after the test car 1 reaches the predetermined speed, the detachable clamp 64 disengages from the test car 1. The water in the first counterweight 59 is pumped by the first suction pump and enters the second counterweight 60 through the connecting pipe 66, thereby slowing down the descent speed of the first counterweight 59. In addition, when the test car 1 needs to be reset for the next test after the test is completed, the lifting and lowering of the detachable clamp 64 can be controlled by controlling the weight difference between the first counterweight 59 and the second counterweight 60, so that it can be clamped back into the test car 1 after the test is completed. Then, by adjusting the weight difference between the first counterweight 59 and the second counterweight 60, the test car 1 can be raised to the test height. With this setting, the test can be completed without the use of a traction machine or other traction equipment.

[0050] Furthermore, the detachable clamp 64 may include an electromagnetic telescopic pin, with a corresponding pin hole provided on the side of the test car 1. The detachable clamp 64 can be engaged or disengaged from the test car 1 by extending or retracting the electromagnetic telescopic pin into or out of the pin hole. Alternatively, it may be a detachable structure such as an electromagnet or a latch, which will not be described in detail here. In addition, in order to ensure that the detachable clamp 64 can be well engaged with the test car 1, a guide rail is also provided on the side of the test car 1, which can guide the detachable clamp 64 well and facilitate its engagement with the test car 1.

[0051] Furthermore, to facilitate reset after testing, the first pawl 31 and the second pawl 32 are provided with a pull rope structure to overcome the pulling force of the fourth offset member, so that the first pawl 31 and the second pawl 32 disengage from the pull rope structure of the one-way ratchet group 33 or the telescopic cylinder structure. In order to ensure that the second pin 21 does not obstruct the retraction of the support ring group 28 after it retracts, the second pin 21 is also provided with a pull rope structure to overcome the pulling force of the second offset member, so that it can be automatically reset during reset, avoiding manual reset.

[0052] Furthermore, to facilitate the selection of the throwing speed of the throwing clutch assembly 19, in addition to selecting a suitable third offset component, to avoid the need for disassembly and assembly of the throwing clutch assembly 19, the weight of the first throwing block 26 and the second throwing block 27 can be changed. Specifically, a counterweight receiving groove can be formed on the side of the throwing block body 37 of the first throwing block 26 and the second throwing block 27 close to the throwing block receiving groove 22, and a counterweight passing groove can be formed at the location where the first guide wheel body 16 is attached to the counterweight receiving groove. Different counterweights are inserted into the counterweight receiving groove through the counterweight passing groove, thereby enabling the first throwing block 26 and the second throwing block 27 to have different throwing speeds. Preferably, an electromagnet is provided in the counterweight receiving groove, and the counterweight is made of magnetic material. The installation and removal of the counterweight are controlled by the on and off states of the electromagnet. In addition, the counterweight receiving groove is located at the end of the throwing block body 37 away from the first hinge point 38.

[0053] Example 2

[0054] like Figures 9-11 As shown, the main difference between Example 2 and Example 1 is that, in order to further ensure the accuracy of the experiment and to facilitate the adjustment of the resistance of the sleeve 4, the actuating ring medium 10 and the synchronizing ring medium 7 are belts 68 including internal teeth 69. The sleeve 4 adjusts the resistance of the actuating ring medium 10 through the brake assembly 76, specifically:

[0055] The actuating ring medium 10 and the synchronizing ring medium 7 are belts 68 including internal teeth 69. The sleeve 4 includes a sleeve body 67, in which a passage groove 71 for the belt 68 to pass is provided. A reduction gear 70 is also rotatably arranged in the sleeve body 67. The reduction gear 70 meshes with the internal teeth 69. Rotating shafts 72 are provided at both ends of the reduction gear 70. The reduction gear 70 is rotatably arranged in the sleeve body 67 through the rotating shafts 72. A brake assembly 76 is provided outside the rotating shafts 72. By adjusting the clamping force of the brake assembly 76 on the rotating shafts 72, the reduction gear 70 provides different resistances to the movement of the belt 68, thereby automatically achieving different resistance adjustments.

[0056] Furthermore, the brake assembly 76 includes two swing rods 74 rotatably mounted on the sleeve body 67. A brake 73 is hinged to the middle of each swing rod 74. A telescopic cylinder 75 is provided at the end of each swing rod 74. The clamping force of the brake assembly 76 clamping the rotating shaft 72 is adjusted by adjusting the telescopic length of the telescopic cylinder 75. The structure of the brake assembly 76 is common knowledge in the art and will not be described in detail here.

[0057] In addition, in order to accommodate the belt including the internal teeth 69, the first guide wheel body 16, the first lower guide wheel 9, the second upper guide wheel 11 and the second lower guide wheel 12 of the first upper guide wheel assembly 8 are provided with tooth-shaped structures that mesh with the internal teeth 69.

[0058] To facilitate a better understanding of this application by those skilled in the art, the working process of the test device of this application is described as follows: Before conducting the test, the test device is initialized: Specifically, the safety clamp linkage 65 of the test car 1 is fixedly mounted on the synchronous ring group 5, the position of the sleeve mounting plate 15 is adjusted, the sleeve 4 is mounted on the sleeve mounting plate 15 and sleeved on the actuating ring group 6, and then the test car 1 is lifted to the predetermined height by the acceleration lifting device 2; when the safety clamp free fall test is to be conducted, the throwing speed of the throwing block clutch assembly 19 of the synchronous ring group 5 is set to the safety clamp actuating speed (e.g., by selecting a suitable...). The third offset component, or by adding an inappropriate counterweight to the counterweight receiving groove of the throwing block body to set the predetermined throwing speed of the throwing block, accelerates the test car 1 to the safety clamp action speed through the acceleration lifting device 2, and then causes the acceleration lifting device 2 to disengage from the test car 1. At this time, the throwing block clutch assembly 19 is thrown out, the first guide wheel body 16 and the second upper guide wheel 11 engage, the second upper guide wheel 11 disengages from the lock of the upper rotating seat 13, the test car 1 drives the second upper guide wheel 11 to rotate, the sleeve 4 slides on the action ring medium 10, causing the action ring medium 10 to decelerate, thereby causing the synchronization ring medium 7 to decelerate, causing the safety clamp linkage 65 to actuate, and thus causing the safety clamp to start. The action triggers the setting of rope group 3, so that sleeve 4 no longer needs to be hung at a very high height, nor does it need to be precisely calculated for the hanging height of sleeve 4. It is only necessary to set sleeve 4 on the sleeve mounting plate 15 at the bottom. In addition, in the set acceleration lifting device 2, by placing the test car 1 at the free end of the second cable 58 and fixing the other end of the second cable 58, the first counterweight 59 set on the first movable pulley 63 can make the test car 1 accelerate at twice the speed, saving acceleration time and acceleration height. In addition, the weight difference between the first counterweight 59 and the second counterweight 60 can be easily adjusted to control the acceleration of the test car 1. In addition, it can also accommodate subsequent operations after the detachable clamp 64 is disengaged from the test car 1; when different speed safety clamp action tests are required, different third offset components can be selected or different counterweights can be set in the counterweight receiving groove to conduct safety clamp performance tests; in addition, when conducting different speed safety clamp action tests, the synchronization ring medium 7 and the action ring medium 10 can be selected as belts 68 with internal teeth 69, so that the sleeve 4 includes a reduction gear 70. By adjusting the clamping force of the brake assembly 76 that clamps the rotating shaft 72 of the reduction gear, the resistance of the sleeve 4 to different decelerations of the action ring medium 10 can be adjusted, so that the test can be carried out more flexibly.The specific operation process of the first upper guide wheel assembly 8 is described as follows: In the initial state, the second pin 21 inside the second upper guide wheel 11 is engaged in the pin locking hole 51 of the upper rotating seat 13 by the support ring assembly 28, and the first pin 20 is retracted in the throwing block receiving groove 22. The first guide wheel body 16 can rotate freely relative to the second upper guide wheel 11 and rotates as the test car 1 accelerates. After the test car 1 reaches the predetermined test speed, the throwing block of the throwing block clutch assembly 19 also reaches the throwing speed. At this time, the first throwing block 26 and the second throwing block 27 are thrown out, pulling the first telescopic rod 24 and the second telescopic rod 25 to slide outward. The first pawl 31 and the second pawl 32 are in one-way ratchet. The gear assembly 35 slides upward to prevent the first telescopic rod 24 and the second telescopic rod 25 from retracting. After the first telescopic rod 24 and the second telescopic rod 25 extend, they cause the first support half-ring 29 and the second support half-ring 30 to separate. The second pin 21 loses support and retracts from the pin locking hole 51. At the same time, the first and second swing blocks are thrown out, driving the first pin 20 to engage in the locking hole of the locking hole assembly 56. The locking holes are evenly distributed in a circle on the side of the second upper guide wheel 11 near the first upper guide wheel assembly 8, thereby unlocking the second upper guide wheel 11. The second upper guide wheel 11 and the first guide wheel body 16 engage, causing the action ring medium 10 to move, causing the sleeve 4 to intervene and triggering the safety clamp.

[0059] The present invention has been described in detail above, with the aim of enabling those skilled in the art to understand and implement the invention. However, this description should not be construed as limiting the scope of protection of the invention. All equivalent changes or modifications made in accordance with the spirit and essence of the invention should be included within the scope of protection of the invention.

Claims

1. A test apparatus for testing the performance of an elevator safety clamp, comprising a test car (1), an acceleration lifting device (2), a trigger rope assembly (3), and a sleeve (4), wherein a safety clamp is installed on the test car (1), the safety clamp is connected to the trigger rope assembly (3) via a safety clamp connecting rod (65), and the acceleration lifting device (2) is connected to the test car (1), characterized in that: The trigger rope group (3) includes a synchronous ring group (5) and an action ring group (6) arranged in parallel. The safety clamp linkage (65) is set on the synchronous ring group (5). The sleeve (4) is set on the action ring group (6). A sleeve mounting plate (15) is set at the bottom of the trigger rope group (3). The sleeve (4) is mounted on the sleeve mounting plate (15). The action ring group (6) includes an action ring medium (10). The sleeve (4) is fixed to the action ring medium (10) by static friction. Before the test car (1) accelerates to the test speed, the synchronous ring group (5) and the action ring group (6) are in a disengaged state. When the test car (1) accelerates to the required test speed, the synchronous ring group (5) and the action ring group (6) are in an engaged state, and the sleeve (4) triggers the safety clamp to move. The synchronization ring assembly (5) includes a synchronization ring medium (7), a first upper guide wheel assembly (8), and a first lower guide wheel (9). The synchronization ring medium (7) is wound between the first upper guide wheel assembly (8) and the first lower guide wheel (9). The motion ring assembly (6) also includes a second upper guide wheel (11) and a second lower guide wheel (12). The motion ring medium (10) is wound between the second upper guide wheel (11) and the second lower guide wheel (12). The first upper guide wheel assembly (8) and the second upper guide wheel... (11) Both are rotatably mounted on an upper rotating seat (13), and the second lower guide wheel (12) and the first lower guide wheel (9) are rotatably mounted on a lower support seat (14). When the synchronous ring group (5) and the action ring group (6) are in the disengaged state, the first upper guide wheel assembly (8) can rotate freely relative to the second upper guide wheel (11). When the synchronous ring group (5) and the action ring group (6) are in the engaged state, the first upper guide wheel assembly (8) and the second upper guide wheel (11) rotate synchronously.

2. The test apparatus for testing the performance of elevator safety clamps according to claim 1, characterized in that: When the synchronization ring group (5) and the action ring group (6) are in the disengaged state, the second upper guide wheel (11) is locked in the upper rotating seat (13) and cannot rotate freely relative to the upper rotating seat (13). When the synchronization ring group (5) and the action ring group (6) are in the engaged state, the second upper guide wheel (11) is released from the lock of the upper rotating seat (13) and rotates freely relative to the upper rotating seat (13).

3. The test apparatus for testing the performance of elevator safety clamps according to claim 2, characterized in that: The first upper guide wheel assembly (8) includes a first guide wheel body (16), a first left support shaft (17), a first right support shaft (18), and a sling clutch assembly (19). A sling receiving groove (22) is provided on one side of the first guide wheel body (16), and the sling clutch assembly (19) is disposed in the sling receiving groove (22). The first left support shaft (17) is disposed on the side of the first guide wheel body (16) close to the sling receiving groove (22), and the first right support shaft (18) is disposed on the other side of the first guide wheel body (16) away from the sling receiving groove (22). The sling clutch assembly (19) includes a middle retaining cylinder (23), a first telescopic rod (24) inserted at both ends of the middle retaining cylinder (23), and a second telescopic rod (25). A first sling (26) is rotatably disposed at the end of the first telescopic rod (24) away from the middle retaining cylinder (23), and a sling clutch assembly (19) is disposed at the end of the second telescopic rod. (25) A second swing block (27) is rotatably provided at the end away from the middle chuck (23). A locking hole group (56) is provided on the side of the second upper guide wheel (11) near the first upper guide wheel assembly (8). A plurality of pin telescopic slot holes (43) are provided on the side of the first guide wheel body (16) near the second upper guide wheel (11). A sliding telescopic first pin (20) is provided in the pin telescopic slot hole (43). The first pin (20) is pressed against the swing block receiving groove (22) by the first biasing member. When the rotation speed of the first guide wheel body (16) exceeds a certain threshold, the first swing block (26) and the second swing block (27) are thrown out, so that the first pin (20) overcomes the biasing force of the first biasing member and extends out of the pin telescopic slot hole (43) and is locked in the locking hole group (56), so that the synchronous ring group (5) and the action ring group (6) are in the engagement state.

4. The test apparatus for testing the performance of elevator safety clamps according to claim 3, characterized in that: A pin through hole (47) is provided on the second upper guide wheel (11), and a pin locking hole (51) is provided on the upper rotating seat (13). A second pin (21) is slidably disposed in the pin through hole (47). The second pin (21) tends to move closer to the throwing block receiving groove (22) due to the action of the second biasing member. A support ring assembly (28) is also provided on the throwing block clutch assembly (19). The support ring assembly (28) is disposed on the first telescopic rod (24) and the second telescopic rod (25). When the first throwing block (26) and / or the second throwing block (27) are not thrown out, the end of the second pin (21) abuts against the first telescopic rod (24) and the second telescopic rod (25). On the support ring assembly (28), the second upper guide wheel (11) is locked and cannot rotate. After the first swing block (26) and / or the second swing block (27) are thrown out, the support ring assembly (28) is in an expanded state as the first telescopic rod (24) and the second telescopic rod (25) extend. The support ring assembly (28) no longer abuts the end of the second pin (21), and the second upper guide wheel (11) can rotate freely. At the same time, the first pin (20) is also inserted into the locking hole assembly (56) by the first swing block (26) and / or the second swing block (27). The synchronization ring assembly (5) engages with the action ring assembly (6).

5. The test apparatus for testing the performance of elevator safety clamps according to claim 4, characterized in that: The support ring assembly (28) includes a first support half-ring (29) and a second support half-ring (30). Both the first telescopic rod (24) and the second telescopic rod (25) include a telescopic rod body (33). A limiting arc groove (36) is formed on one side of each telescopic rod body (33). The first support half-ring (29) is engaged in the limiting arc groove (36) of the first telescopic rod (24), and the second support half-ring (30) is engaged in the limiting arc groove (36) of the second telescopic rod (25). Before the first throwing block (26) and / or the second throwing block (27) are thrown out… At that time, the first support half ring (29) and the second support half ring (30) fit together to form a complete ring. After the first throwing block (26) and / or the second throwing block (27) are thrown out, the first telescopic rod (24) and / or the second telescopic rod (25) slide out from the middle retainer (23) and drive the first support half ring (29) and / or the second support half ring (30) to slide outward through the limiting arc groove (36), so that the complete ring is separated and the support ring group (28) is in the expanded state. The second biasing member drives the second pin (21) to disengage from the pin locking hole (51).

6. The test apparatus for testing the performance of elevator safety clamps according to claim 5, characterized in that: Two rotating slots (42) are also provided on the side of the first guide wheel body (16) near the second upper guide wheel (11). The first throwing block (26) and the second throwing block (27) both include a throwing block body (37). A first hinge point (38) is provided at the end of the throwing block body (37), and a second hinge point (39) is provided in the middle of the throwing block body (37). The first hinge point (38) of the first throwing block (26) corresponds to one of the two rotating slots (42), and the first hinge point (38) of the second throwing block (27) corresponds to the other of the two rotating slots (42). The telescopic rod main The body (33) is also provided with a transition end (34) at one end away from the intermediate clamp (23). The transition end (34) of the first telescopic rod (24) corresponds to the second hinge point (39) of the first swing block (26), and the transition end (34) of the second telescopic rod (25) corresponds to the second hinge point (39) of the second swing block (27). A detachable third biasing member is also sleeved on the first telescopic rod (24) and the second telescopic rod (25), or the detachable third biasing member is a torsion spring, which is set on the first hinge point (38) of the first swing block (26) and the second swing block (27).

7. The test apparatus for testing the performance of elevator safety clamps according to claim 6, characterized in that: A counterweight receiving groove is provided on the side of the main body (37) of the first throwing block (26) and the second throwing block (27) close to the throwing block receiving groove (22). A counterweight passing groove is provided on the first guide wheel body (16) where it is in contact with the counterweight receiving groove. Different counterweights are inserted into the counterweight receiving groove through the counterweight passing groove, so that the first throwing block (26) and the second throwing block (27) can have different throwing speeds. The counterweight receiving groove is provided at the end of the throwing block body (37) away from the first hinge point (38).

8. The test apparatus for testing the performance of elevator safety clamps according to claim 1, characterized in that: The accelerated lifting device (2) includes a first fixed pulley (61), a second fixed pulley (62), a first movable pulley (63), a first cable (57), a second cable (58), a detachable clamp (64), a first counterweight (59), and a second counterweight (60). The first fixed pulley (61) and the second fixed pulley (62) are fixedly mounted on the top of the test device. The first cable (57) passes around the first fixed pulley (61) and the second fixed pulley (62), and both ends of the first cable (57) are respectively connected to the first fixed pulley (61) and the second fixed pulley (62). A detachable clamp (64) and a second counterweight (60) are provided. The detachable clamp (64) is detachably connected to the side of the test car (1). One end of the second cable (58) is fixedly mounted on the test device, and the other end is fixedly mounted on the detachable clamp (64). The first movable pulley (63) is wound around the second cable (58). The first counterweight (59) is provided at the lower end of the first movable pulley (63). The test car (1) is accelerated by the first counterweight (59).

9. A test apparatus for testing the performance of an elevator safety clamp according to any one of claims 1-8, characterized in that: The actuating ring medium (10) and the synchronizing ring medium (7) are belts (68) including internal teeth (69). The sleeve (4) includes a sleeve body (67). A passage groove (71) for the belt (68) to pass through is provided in the sleeve body (67). A reduction gear (70) is also rotatably provided in the sleeve body (67). The reduction gear (70) meshes with the internal teeth (69). Rotating shafts (72) are provided at both ends of the reduction gear (70). The reduction gear (70) is rotatably provided in the sleeve body (67) through the rotating shafts (72). A brake assembly (76) is provided outside the rotating shafts (72). By adjusting the clamping force of the brake assembly (76) clamping the rotating shafts (72), the reduction gear (70) provides different resistances to the movement of the belt (68).

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