A device for testing the anti-fall performance of a fall arrester

Abstract

The invention relates to the technical field of fall arrester testing, and in particular to a fall arrester anti-fall performance testing device. Aiming at the limited testing length and low testing efficiency of existing fall arrester testing equipment, a fall arrester anti-fall performance testing device is provided, comprising a bottom plate, a top plate is provided at the upper end of the bottom plate, a fall arrester is provided at the lower end of the top plate, an anti-fall rope is provided at the lower end of the fall arrester, and an anti-fall hook is provided at the lower end of the anti-fall rope; a plurality of long guide rods are provided on the upper end surface of the bottom plate, a winding drum which can rotate and cooperate with the anti-fall hook is provided at the upper end of the test plate, an irregular cam which can rotate is also provided on one side of the upper end of the bottom plate, a driving pin which cooperates with the irregular cam is provided at the lower end of the test plate, and when the irregular cam rotates, a structure in which the test plate slowly moves upward and then freely falls downward and performs irregular movements is formed by cooperating with the driving pin; the structure can test multiple point positions of multiple lengths of the arrester, and the operation is convenient and the testing efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of fall arrester testing, and in particular to a fall arrester anti-falling performance testing device. Background Art

[0002] A fall arrester is a protective device that can quickly brake and lock a falling object within a limited distance. It is suitable for safety protection when preventing the suspended workpiece from accidentally falling during overhead crane lifting. It can effectively protect the lives of ground operators and damage to the suspended workpiece. It is used in high-altitude workplaces such as metallurgy and automobile manufacturing, petrochemicals, engineering construction, electric power, ships, communications, pharmaceuticals, and bridges.

[0003] The fall arrester needs to be impact tested before use to check whether the detection device can be buckled within the effective stroke. Although there are devices capable of impact testing fall arresters in current equipment, there are still certain defects. For example, the publication number is: CN218916790U, and the name is: A fall arrester self-locking device testing device. The device can only test within a specified length. During multi-point testing, it is necessary to accurately adjust the position of the nut and control the cylinder and the nut to engage again, which increases the difficulty of the test and reduces the test efficiency. In order to make the test more accurate in the impact experiment, multiple point positions of multiple sections of the arrester are usually tested. The device cannot meet the above requirements. For this reason, a fall arrester anti-fall performance testing device is designed to solve the above-mentioned problems. Summary of the invention

[0004] In view of the limited testing length and low testing efficiency of existing fall arrester testing equipment, the present invention provides a fall arrester anti-fall performance testing device, which can test multiple point positions of multiple section lengths of the fall arrester, is easy to operate and has high testing efficiency, and effectively solves the problems mentioned in the above background technology.

[0005] In order to solve the above problems, the technical solution adopted by the present invention is:

[0006] A device for testing the anti-fall performance of a fall arrester comprises a bottom plate, a top plate is provided at the upper end of the bottom plate, a fall arrester is provided at the lower end of the top plate, an anti-fall rope is provided at the lower end of the fall arrester, and an anti-fall hook is provided at the lower end of the anti-fall rope; a plurality of long guide rods are provided on the upper end surface of the bottom plate, a test plate is sleeved on the outer surface of the plurality of long guide rods, a winding drum which can rotate and cooperate with the anti-fall hook is provided at the upper end of the test plate, an irregular cam which can rotate is also provided on one side of the upper end of the bottom plate, a driving pin which cooperates with the irregular cam is provided at the lower end of the test plate, and when the irregular cam rotates, it can form a structure in which the test plate moves slowly upward and then freely falls downward in an irregular motion.

[0007] A rotatable first threaded rod is disposed on the upper surface of the top plate, a first threaded barrel is threadedly connected to the outer surface of the first threaded rod, and the fall arrester is detachably mounted on the lower end of the first threaded barrel.

[0008] A second motor is fixedly connected to the upper surface of the test plate, a worm is fixedly connected to the output end of the second motor, a worm is meshed with a worm wheel at the upper end of the worm, and a first rotating shaft rotatably connected to the test plate is fixedly connected to the inner wall at the center of the worm wheel; a winding drum is installed at the output end of the first rotating shaft, a through groove is provided on the inner wall of the winding drum, and a blocking device matching with the anti-fall rope is provided on the inner wall of the through groove; a first motor is also fixedly connected to the upper surface of the bottom plate, an irregular cam is fixedly connected to the output end of the first motor, and a plurality of special-shaped protrusions matching with the driving pin are provided on the irregular cam.

[0009] The blocking device comprises two square boxes, which are respectively mounted on the inner walls at the left and right ends of the through slot, the inner walls of the square boxes are respectively slidably connected with trapezoidal wedges, and the inner walls at the bottom ends of the square boxes are respectively fixed with first springs matching with the trapezoidal wedges.

[0010] The upper and lower end surfaces of the square box are respectively fixed with guide pins, and the inner walls on both sides of the groove are respectively provided with oblique grooves matching the guide pins. The test plate is also provided with a first support seat that can move forward and backward, and the inner wall of the first support seat is rotatably connected with a connecting disk, and the inner walls at both ends of the groove are also slidably connected with pull rods, and the front end surfaces of the pull rods are respectively fixed with connecting plates. The square boxes are respectively slidably connected to the corresponding connecting plates, and the rear end surfaces of the pull rods are respectively fixed with arc-shaped sliders slidably connected to the connecting disks.

[0011] A ratchet is fixedly connected to the front end surface of the connecting disk, and the connecting disk is slidably connected to the outer surface of the first rotating shaft. A supporting disk is fixedly connected to the inner wall at the center of the winding drum, and two pawls that are centrally symmetrical and cooperate with the ratchet are hinged on the supporting disk. Two supporting pins are respectively fixedly connected to the end surfaces of one side of the supporting disk, and the supporting pins are respectively fixedly connected to third springs that cooperate with the pawls. A large spring that cooperates with the connecting disk is sleeved on the outer surface of the first rotating shaft.

[0012] The test plate is provided with a rotatable first disc at the lower end, and two centrally symmetrical first connecting rods are hinged at non-center points on the lower end surface of the first disc. A square slider is slidably connected to the lower end surface of the test plate, and the square slider and the first support seat are respectively hinged on the corresponding first connecting rods. A spring stop seat is also fixedly connected to the lower end surface of the test plate, and a second spring matching the square slider is fixedly connected to one side end surface of the spring stop seat, and the driving pin is fixedly connected to the square slider.

[0013] The lower end surface of the test plate is fixed with four evenly distributed short guide rods, the outer surface of the four short guide rods is sleeved with a cylindrical cam that can move up and down, the inner wall of the cylindrical cam is provided with two sections of centrally symmetrical arc-shaped sliding grooves, and the lower end of the first disc is coaxially fixed with a long pin that matches the arc-shaped sliding groove.

[0014] Two screw-through rods are fixedly connected to the left and right sides of the upper end surface of the test plate respectively, and a plurality of counterweight blocks are sleeved on the outer surfaces of the two screw-through rods, and nuts are also threadedly connected on the outer surfaces of the screw-through rods respectively.

[0015] The left and right sides of the upper surface of the bottom plate are respectively fixedly connected to a third motor, the output ends of the third motor are respectively fixedly connected to a second threaded rod, a reset support plate is threadedly connected on the outer surface of the two second threaded rods, and the left and right sides of the upper surface of the reset support plate are respectively fixedly connected to a bracket.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] When in use, by placing and fixing the anti-fall hook on the take-up drum, when the irregular cam rotates, it can drive the corresponding test plate, take-up drum, and anti-fall hook to slowly move upward and then move downward freely by fall. When moving slowly upward, the anti-fall device can reel in the anti-fall rope. When the take-up drum, the test plate, and the anti-fall hook move downward freely by fall, the anti-fall device can be tested, so that the self-locking function on the anti-fall device is opened, and the positions of the anti-fall rope, the anti-fall hook, the take-up drum, and the test plate are locked and positioned, that is, the anti-fall device is impact tested. By setting the irregular cam and the driving pin in cooperation, the test plate and the take-up drum can be made to move irregularly for many times, and a multi-point test can be performed on a specified length section of the anti-fall device. The anti-fall rope can be wound through the rotatable take-up drum, that is, the anti-fall rope in the anti-fall device can be pulled out, that is, the specified length section of the anti-fall rope can be tested, and multiple point positions of multiple sections of the anti-fall device can be tested, thereby improving the test accuracy, being convenient to operate, and having high test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a first isometric view of a device for testing the anti-fall performance of a fall arrester of the present invention.

[0019] Figure 2 It is a second axonometric diagram of a device for testing the anti-fall performance of a fall arrester of the present invention.

[0020] Figure 3 It is a schematic diagram of the installation of the first threaded barrel of a fall arrester anti-fall performance testing device of the present invention.

[0021] Figure 4 The present invention is a schematic diagram of the installation of a test plate of a fall arrester performance testing device.

[0022] Figure 5 The present invention is a schematic diagram of the installation of a worm gear of a device for testing the anti-fall performance of a fall arrester.

[0023] Figure 6 The present invention is a schematic diagram of the installation of a connection plate of a fall arrester anti-fall performance testing device.

[0024] Figure 7 The present invention is a schematic diagram of the installation of a pawl of a fall arrester anti-fall performance testing device.

[0025] Figure 8 The present invention is a schematic diagram of a slot-penetrating structure of a device for testing the anti-fall performance of a fall arrester.

[0026] Fig. 9 The present invention is a schematic diagram of the installation of a pull rod of a device for testing the anti-fall performance of a fall arrester.

[0027] Fig.10 The present invention is a square box cross-sectional view of a device for testing the anti-falling performance of a fall arrester.

[0028] Fig.11 The present invention is a cross-sectional view of a winding drum of a fall arrester anti-falling performance testing device.

[0029] Fig.12 The present invention is a schematic diagram of the installation of a ratchet wheel of a device for testing the anti-fall performance of a fall arrester.

[0030] Fig.13 The present invention is a schematic diagram of an irregular cam structure of a device for testing the anti-fall performance of a fall arrester.

[0031] Fig.14 The present invention is a schematic diagram of the cylindrical cam structure of a fall arrester anti-fall performance testing device.

[0032] Fig.15 The present invention is a schematic diagram of the installation of a long pin of a fall arrester anti-fall performance testing device.

[0033] Fig.16 The present invention is a schematic diagram of the installation of a reset support plate of a fall arrester anti-fall performance testing device.

[0034] Numbers in the figure: 1-bottom plate, 2-long guide rod, 3-buffer seat, 4-test plate, 5-top plate, 6-first threaded rod, 7-first threaded cylinder, 8-handle, 9-fall arrester, 10-fall arrester rope, 11-fall arrester hook, 12-first motor, 13-irregular cam, 14-counterweight, 15-second motor, 16-worm, 17-worm wheel, 18-first rotating shaft, 19-first supporting seat, 20-connecting plate, 21-ratchet, 22-pawl, 23-third spring, 24-blocking piece, 25-support pin, 26-winding drum, 27-supporting plate, 28-slot, 29-first supporting block seat, 30 -notch, 31-trapezoidal wedge, 32-first spring, 33-square box, 34-connecting plate, 35-pull rod, 36-arc-shaped slider, 37-guide pin, 38-bevel groove, 39-driving pin, 40-square slider, 41-cylindrical cam, 42-ear plate, 43-short guide rod, 44-anti-slip pad, 45-arc-shaped slide groove, 46-long pin, 47-first disc, 48-first connecting rod, 49-second spring, 50-spring block seat, 51-third motor, 52-second threaded rod, 53-reset support plate, 54-support seat, 55-second support block seat, 56-large spring, 57-screw rod, 58-nut. DETAILED DESCRIPTION

[0035] The following are specific embodiments of the present invention, and the technical solutions of the present invention are further described in conjunction with the accompanying drawings, but the present invention is not limited to these embodiments.

[0036] like Figure 1-Figure 16 As shown, the present invention provides a device for testing the anti-falling performance of a fall arrester, comprising a bottom plate 1, a top plate 5 is provided at the upper end of the bottom plate 1, a fall arrester 9 is provided at the lower end of the top plate 5, an anti-falling rope 10 is provided at the lower end of the fall arrester 9, and an anti-falling hook 11 is provided at the lower end of the anti-falling rope 10; a plurality of long guide rods 2 are provided on the upper end surface of the bottom plate 1, a test plate 4 is sleeved on the outer surface of the plurality of long guide rods 2, a winding drum 26 which can rotate and cooperate with the anti-falling hook 11 is provided at the upper end of the test plate 4, an irregular cam 13 which can rotate is also provided on one side of the upper end of the bottom plate 1, a driving pin 39 which cooperates with the irregular cam 13 is provided at the lower end of the test plate 4, and when the irregular cam 13 rotates, it can form a structure in which the test plate 4 moves slowly upward and then moves freely downward in an irregular motion through cooperation with the driving pin 39.

[0037] like Figure 1-Figure 8The bottom plate 1 is used to support the entire device. The bottom plate 1 is a prior art and will not be described in detail. There are four long guide rods 2, which are distributed at the four end corners of the upper surface of the bottom plate 1. The top plate 5 is fixedly connected to the upper surfaces of the four long guide rods 2. The long guide rods 2 can support and limit the top plate 5. The test plate 4 can be slidably connected to the outer surface of the long guide rods 2 up and down, that is, the limit test plate 4 can only move up and down. The lower ends of the long guide rods 2 are respectively fixed with buffer seats 3, which can buffer the test plate 4 and prevent the test plate 4 from accidentally falling and damaging the equipment. The top plate 5 is used to support components such as the anti-fall device 9. The anti-fall device 9 is detachably installed at the lower end of the top plate 5. The anti-fall device 9, the anti-fall rope 10, and the anti-fall hook 11 all belong to the prior art and will not be described in detail. The test plate 4 is used to install and support the winding drum 26. By placing the anti-fall hook 11 on the winding drum 26, when the irregular cam 13 rotates, it can drive the corresponding test plate 4, the winding drum 26, and the anti-fall hook 1 1 moves upward slowly and then moves downward freely by falling. When moving upward slowly, the anti-fall device 9 can reel in the anti-fall rope 10. When the anti-fall hook 11 moves downward freely by falling, the anti-fall device 9 can be tested, so that the self-locking function on the anti-fall device 9 is opened, so that the positions of the anti-fall rope 10, the anti-fall hook 11, the reel 26 and the test plate 4 are locked and positioned, that is, the anti-fall device 9 is impact tested. By setting the irregular cam 13 and the cooperation of the driving pin 39, the test plate 4 and the reel 26 can make irregular movements for many times, so as to perform multi-point tests on the specified length section of the anti-fall device 9. The anti-fall rope 10 can be wound by the rotatable reel 26, that is, the anti-fall rope 10 in the anti-fall device 9 can be pulled out, that is, the specified length section of the anti-fall rope 10 can be tested, and the multiple point positions of multiple section lengths of the anti-fall device can be tested, thereby improving the test accuracy, convenient operation and high test efficiency.

[0038] A rotatable first threaded rod 6 is disposed on the upper end surface of the top plate 5 , a first threaded barrel 7 is threadedly connected to the outer surface of the first threaded rod 6 , and the anti-fall device 9 is detachably mounted on the lower end of the first threaded barrel 7 .

[0039] like Figure 3As shown, the left and right ends of the outer surface of the first threaded rod 6 are rotatably connected with bearing seats, and the bottom ends of the bearing seats are respectively fixed to the upper end surface of the top plate 5, limiting the first threaded rod 6 to be able to rotate, and the left and right end surfaces of the first threaded rod 6 are respectively fixed with handles 8, which can drive the corresponding first threaded rod 6 to rotate by driving the handle 8, and the first threaded rod 6 can also be started by setting a motor, which is set according to needs; an openable and closable hook is provided at the upper end of the fall arrester 9, and the hook is hung at the lower end of the first threaded tube 7. Through the cooperation of the hook and the first threaded tube 7, the fall arrester 9 can be disassembled, and the hook is a prior art and will not be repeated; the first threaded rod 6 and the first threaded tube 7 are threadedly connected and have a self-locking function, that is, when the first threaded rod 6 does not rotate, the corresponding first threaded tube 7 and the position of the fall arrester 9 are in the specified position; when the first threaded rod 6 rotates, the corresponding first threaded tube 7 and the fall arrester 9 can be driven to move left or right, and the fall arrester 9 can be subjected to an inclined tensile test and multiple scene simulations.

[0040] A second motor 15 is fixedly connected to the upper end surface of the test plate 4, a worm 16 is fixedly connected to the output end of the second motor 15, a worm wheel 17 is meshed at the upper end of the worm 16, and a first rotating shaft 18 rotatably connected to the test plate 4 is fixedly connected to the inner wall at the center of the worm wheel 17; a winding drum 26 is installed at the output end of the first rotating shaft 18, a through groove 28 is opened on the inner wall of the winding drum 26, and a blocking device matching with the anti-fall rope 10 is provided on the inner wall of the through groove 28; a first motor 12 is also fixedly connected to the upper end surface of the base plate 1, an irregular cam 13 is fixedly connected to the output end of the first motor 12, and a plurality of special-shaped protrusions matching with the driving pin 39 are provided on the irregular cam 13.

[0041] like Figure 1-Figure 2 , Figure 5-Figure 8 , Fig.13 As shown, the function of the first motor 12 is to provide a rotational force for the irregular cam 13, and the function of the second motor 15 is to provide a rotational force for the first rotating shaft 18. The motor is a prior art and will not be described in detail. The first rotating shaft 18 and the worm 16 are rotatably connected to the outer surfaces thereof with bearing seats, and the bottom ends of the bearing seats are respectively fixed to the upper end surfaces of the test plate 4. The bearing seats are used to limit the worm 16 and the first rotating shaft 18 to be able to rotate, and have a self-locking function under the meshing of the worm wheel 17 and the worm 16, that is, when the worm 16 does not rotate, the corresponding worm wheel 17 and the first rotating shaft 18 will not rotate. The winding drum 26 and the through slot 28 are installed and shaped as shown in FIG. Figure 8As shown, the upper surface of the test plate 4 is also fixedly connected to the first support block seat 29 and the second support block seat 55, the winding drum 26 is rotatably connected to the inner wall of the first support block seat 29 and the second support block seat 55, the limit winding drum 26 can stably rotate on the test plate 4, and the second support block seat 55 is also provided with a notch 30 that matches the through groove 28. When the through groove 28 is aligned with the notch 30, the anti-fall rope 10 can be placed on the inner wall of the through groove 28. Through the provided through groove 28, the anti-fall rope 10 can be placed. The anti-fall rope 10 is contained, and the anti-fall hook 11 is placed on the inner wall of the winding drum 26, and the anti-fall rope 10 is placed on the inner wall of the groove 28, and then the blocking device is set to limit the anti-fall rope 10 to prevent the anti-fall rope 10 from falling off the groove 28; when the test plate 4 and the winding drum 26 perform free fall downward, the anti-fall rope 10 and the anti-fall hook 11 can be pulled downward to detect the locking status of the anti-fall device 9; the installation and shape of the driving pin 39 and the irregular cam 13 are as shown Fig.13 As shown, when the irregular cam 13 rotates, the corresponding driving pin 39 can be slowly moved upwards through the cooperation of the special-shaped protrusion and the driving pin 39, and after moving upwards to the top, it will freely fall downwards, that is, the corresponding driving pin 39, the winding drum 26, etc. move upwards, and after moving upwards to the specified position, they will freely fall downwards, thereby testing the anti-fall device 9; by setting different lengths of the special-shaped cam, when cooperating with the driving pin 39, the special-shaped protrusion can make the driving pin 39, the test plate 4, and the winding drum 26 rise to different heights and then fall, thereby testing multiple points within the specified length of the anti-fall rope 10; when it is necessary to change the test position of another section of the anti-fall rope 10, by starting the second motor 15, the worm 16, the worm wheel 17, the first rotating shaft 18, and the winding drum 26 can be rotated, and the anti-fall rope 10 can be stretched when the winding drum 26 rotates, even if the anti-fall rope 10 is wrapped around the outer surface of the winding drum 26, thereby testing the lengths of multiple sections of the anti-fall rope 10.

[0042] The blocking device includes two square boxes 33, which are respectively installed on the inner walls of the left and right ends of the through slot 28. The inner walls of the square boxes 33 are slidably connected with trapezoidal wedges 31, and the inner walls of the bottom ends of the square boxes 33 are respectively fixed with first springs 32 that match the trapezoidal wedges 31.

[0043] like Figure 9-10As shown in the figure, the trapezoidal wedge block 31 can slide left and right on the inner wall of the square box 33, and the first spring 32 always has an inward driving force on the trapezoidal wedge block 31, so that the trapezoidal wedge block 31 is at the innermost end under normal conditions. The front end of the trapezoidal wedge block 31 is an inclined surface and the rear end is a straight surface. When the anti-fall rope 10 moves from front to back and enters the inner wall of the through groove 28, the anti-fall rope 10 can contact the inclined surface of the trapezoidal wedge block 31. Under the action of the inclined surface, the trapezoidal wedge block 31 will move outward and compress the first spring 32. Spring 32, when the anti-fall rope 10 enters the inner wall of the groove 28, that is, the anti-fall rope 10 is out of contact with the trapezoidal wedge block 31, the trapezoidal wedge block 31 can move inward and reset under the elastic force of the first spring 32 itself, and when the anti-fall rope 10 moves from back to front and breaks away from the inner wall of the groove 28, the anti-fall rope 10 will contact the straight surface of the trapezoidal wedge block 31, that is, it can prevent the anti-fall rope 10 from moving forward, so that the anti-fall rope 10 can only move in the space of the groove 28 to prevent it from breaking away.

[0044] The upper and lower end surfaces of the square box 33 are respectively fixed with guide pins 37, and the inner walls on both sides of the groove 28 are respectively provided with inclined grooves 38 matching the guide pins 37. The test plate 4 is also provided with a first support seat 19 that can move forward and backward, and the inner wall of the first support seat 19 is rotatably connected with a connecting plate 20. The inner walls at both ends of the groove 28 are also slidably connected with pull rods 35, and the front end surfaces of the pull rods 35 are respectively fixed with connecting plates 34. The square boxes 33 are respectively slidably connected to the corresponding connecting plates 34, and the rear end surfaces of the pull rods 35 are respectively fixed with arc-shaped sliders 36 slidably connected to the connecting plate 20.

[0045] like Figure 9-12 As shown, the pull rod 35 can be slidably connected to the inner wall of the winding drum 26, and the installation and shape of the arc-shaped slider 36, the pull rod 35, the connecting plate 34, and the square box 33 are as shown in FIG. Fig. 9 As shown, the square box 33 can be slidably connected to the connecting plate 34; the installation and shape of the pull rod 35 and the connecting plate 20 are as shown in FIG. Fig.12 As shown, the arc-shaped slider 36 can slide on the inner wall of the connecting disk 20, that is, when the connecting disk 20 and the winding drum 26 rotate relative to each other, the connecting disk 20 can always be connected to the pull rod 35, and the movement of the pull rod 35 can be controlled without affecting the rotation; the installation and shape of the guide pin 37 and the inclined groove 38 are as shown in FIG. Fig.11As shown, when the square box 33 and the guide pin 37 move backward, the engagement of the inclined slot 38 and the guide pin 37 can drive the corresponding square box 33 and the trapezoidal wedge block 31 to move outward and backward at the same time, that is, the trapezoidal wedge block 31 will move inward until it completely enters the inner wall of the through slot 28. At this time, the blocking device is in a closed state, and the anti-fall rope 10 can be taken out from the inner wall of the through slot 28; through the first support seat 19 that can move forward and backward, when the first support seat 19 moves forward or backward, the corresponding connecting plate 20, the arc-shaped slider 36, the pull rod 35, the square box 33, etc. can be driven to move forward or backward synchronously. When the square box 33 moves forward or backward, under the engagement of the guide pin 37 and the inclined slot 38, the square box 33 will move forward to the top end, that is, the blocking device is opened, or move backward to the top end, that is, the blocking device is closed, thereby controlling the opening and closing of the through slot 28.

[0046] A ratchet 21 is fixedly connected to the front end surface of the connecting disk 20, and the connecting disk 20 is slidably connected to the outer surface of the first rotating shaft 18. A support disk 27 is fixedly connected to the inner wall at the center of the winding drum 26, and two pawls 22 that are centrally symmetrical and cooperate with the ratchet 21 are hinged on the support disk 27. Two support pins 25 are respectively fixedly connected to the end surfaces of one side of the support disk 27, and third springs 23 that cooperate with the pawls 22 are respectively fixedly connected to the support pins 25. A large spring 56 that cooperates with the connecting disk 20 is sleeved on the outer surface of the first rotating shaft 18.

[0047] like Figure 5 , Figure 7 , Fig.12 As shown, the connecting plate 20 and the first rotating shaft 18 are spline-connected. The connecting plate 20 can slide back and forth on the outer surface of the first rotating shaft 18, and when the first rotating shaft 18 rotates, the connecting plate 20 can be driven to rotate; the end surfaces of one side of the supporting plate 27 are also fixedly connected with baffles 24, which can prevent the pawl 22 from excessively turning outward, such as Fig.12As shown, the limit pawl 22 can only flip and move within the specified space; the support pin 25 supports and fixes the third spring 23, the inner ends of the third spring 23 are respectively fixed to the support pin 25, and the outer ends of the third spring 23 are respectively fixed to the corresponding pawl 22. The third spring 23 always has an outward driving force on the pawl 22, so that the pawl 22 is at the outermost end under normal conditions, that is, it can be stably engaged with the ratchet 21 under normal conditions; one end of the large spring 56 is fixed to the bearing seat, and the other end of the large spring 56 is fixed to a circular ring gasket, which is rotatably connected to the connecting The disk 20 is equivalent to a large spring 56 that is rotatably connected to the connecting disk 20, which does not affect the rotation of the connecting disk 20 and can drive the connecting disk 20 to have a forward driving force. The large spring 56 can drive the connecting disk 20 and the first support seat 19 to have a forward driving force. The first support seat 19 has a forward driving force under normal conditions, which can make the connecting disk 20, the ratchet 21, the square box 33, and the trapezoidal wedge block 31 always at the front end position. When the trapezoidal wedge block 31 is at the front end, the blocking device can be in an open state, and the ratchet 21 and the pawl 22 are stably meshed. When the first rotating shaft 18 rotates, it can drive the ratchet 21 and the pawl 22 to rotate synchronously. When the ratchet pawl 22 rotates, it will drive the corresponding support plate 27 and the winding drum 26 to rotate synchronously. When the winding drum 26 rotates, the anti-fall rope 10 will be pulled and wound around the winding drum 26 to test the anti-fall ropes 10 of different lengths. With the cooperation of the ratchet 21 and the pawl 22, the position of the anti-fall rope 10 can also be manually adjusted. When the second motor 15 is not started, the corresponding pawl 22 can be driven to move in a circle on the inner wall of the ratchet 21 by rotating the winding drum 26. , thereby manually adjusting the test section of the anti-fall rope 10, according to the specific usage requirements; when the first support seat 19 moves backward, it can drive the corresponding ratchet 21, square box 33, etc. to move backward synchronously. When the ratchet 21 moves backward to disengage from the pawl 22, and the square box 33 moves to make the trapezoidal wedge block 31 move to the outermost side, the blocking device is in the open state at this time, and the winding drum 26 no longer restricts the rotation. That is, at this time, the anti-fall device 9 can make the anti-fall rope 10 retract into the anti-fall device 9 under the winding force of its own winding spring, that is, the test of the anti-fall device 9 is completed, and disassembly is convenient.

[0048] A rotatable first disc 47 is provided at the lower end of the test plate 4, and two centrally symmetrical first connecting rods 48 are hinged at non-center portions of the lower end surface of the first disc 47. A square slider 40 is slidably connected to the lower end surface of the test plate 4, and the square slider 40 and the first support seat 19 are respectively hinged on the corresponding first connecting rods 48. A spring stop seat 50 is also fixedly connected to the lower end surface of the test plate 4, and a second spring 49 matching the square slider 40 is fixedly connected to one side end surface of the spring stop seat 50, and a driving pin 39 is fixedly connected to the square slider 40.

[0049] like Figure 14-15As shown, a rotating shaft is fixedly connected to the inner wall of the first disc 47, and the rotating shaft is rotatably connected to the inner wall of the test plate 4. The first disc 47 can only rotate through the rotating shaft limit; the square slider 40 can slide back and forth on the lower end surface of the test plate 4, and the spring stopper 50 supports and limits the second spring 49. The second spring 49 always has a backward driving force on the square slider 40, even if the driving pin 39 and the square slider 40 are in the rearmost position under normal conditions, so that the driving pin 39 and the irregular cam 13 are stably engaged; the first support seat 19 passes through the test plate 4 and can be slidably connected to the inner wall of the test plate 4 back and forth; the installation and shape of the first connecting rod 48, the first support seat 19, the square slider 40, the driving pin 39, and the disc are as shown in Fig.15 As shown, the inner ends of the first connecting rod 48 are respectively hinged on the first disc 47, and the outer ends of the first connecting rod 48 are respectively hinged on the corresponding square slider 40 and the first support seat 19. The first support seat 19 is normally at the front end position under the elastic force of the large spring 56. When the first disc 47 rotates, it can drive the corresponding first connecting rod 48 to move inward or outward. When the first connecting rod 48 moves inward, it will pull the square slider 40 and the first support seat 19 to move inward, and the square slider 40 moves inward. When the driving pin 39 moves forward, it will disengage from the irregular cam 13. When the first support plate moves backward, it will drive the corresponding square box 33 to move backward, that is, the blocking device is closed, and the ratchet 21 will be driven to move backward and disengage from the pawl 22. At this time, the anti-fall rope 10 can be retracted into the anti-fall device 9 and reset. After the irregular cam 13 is disengaged from the driving pin 39, the corresponding test plate 4 will move downward and reset, so that the test plate 4 and the anti-fall device 9 can be quickly reset.

[0050] Four evenly distributed short guide rods 43 are fixed to the lower end surface of the test plate 4, and a cylindrical cam 41 that can move up and down is sleeved on the outer surface of the four short guide rods 43. Two sections of centrally symmetrical arc-shaped sliding grooves 45 are opened on the inner wall of the cylindrical cam 41. A long pin 46 coaxially fixed to the lower end of the first disc 47 and matched with the arc-shaped sliding groove 45 is fixed.

[0051] like Figure 14-15 As shown, four evenly distributed ear plates 42 are fixedly connected to the outer surface of the cylindrical cam 41, and the ear plates 42 are respectively sleeved on the outer surface of the short guide rod 43. The short guide rod 43 limits the ear plates 42 and the cylindrical cam 41, so that the cylindrical cam 41 can only move up and down but not rotate; the lower end surface of the short guide rod 43 is respectively fixedly connected to an anti-detachment pad 44, and the function of the anti-detachment pad 44 is to prevent the short guide rod 43 from being separated from the ear plate 42, that is, to prevent the cylindrical cam 41 from being separated; the lower end surface of the rotating shaft is fixedly connected to a support seat, and a long pin 46 is fixedly connected to the inner wall of the support seat, as shown in FIG. Fig.15As shown, it is equivalent to that the long pin 46 is coaxially fixed to the lower end of the first disc 47; when the cylindrical cam 41 moves upward, under the engagement of the arc-shaped slide groove 45 and the long pin 46, it can drive the corresponding long pin 46 to rotate, and when the long pin 46 rotates, it will drive the corresponding first disc 47 to rotate, and when the first disc 47 rotates, it will drive the corresponding driving pin 39 to move forward, the blocking device is closed, and the ratchet 21 moves backward to disengage from the pawl 22.

[0052] Two screw rods 57 are fixedly connected to the left and right sides of the upper end surface of the test plate 4 respectively. A plurality of counterweights 14 are sleeved on the outer surfaces of the two screw rods 57 . Nuts 58 are also threadedly connected to the outer surfaces of the screw rods 57 .

[0053] like Figure 4 As shown, the screw rod 57 is used to support the limited counterweight block 14. By setting up multiple counterweight blocks 14, the weight of the test plate 4 can be set according to the test requirements. The nut 58 is detachably mounted on the screw rod 57. When the nut 58 rotates and moves downward to the bottom, the counterweight block 14 can be squeezed and fixed to prevent the counterweight block 14 from shaking. The counterweight block 14, the screw rod 57, and the nut 58 all belong to the existing technology and will not be repeated.

[0054] A third motor 51 is fixedly connected to the left and right sides of the upper end surface of the base plate 1, and a second threaded rod 52 is fixedly connected to the output end of the third motor 51. A reset support plate 53 is threadedly connected on the outer surface of the two second threaded rods 52, and a bracket 54 is fixedly connected to the left and right sides of the upper end surface of the reset support plate 53.

[0055] like Fig.16 As shown, the function of the third motor 51 is to provide force for the threaded rod. The upper ends of the second threaded rods 52 are respectively rotatably connected to the top plate 5, and the second threaded rods 52 are limited to be able to rotate stably; the installation and shape of the reset support plate 53 and the support seat 54 are as shown in Fig.16As shown, when the second threaded rod 52 rotates, the reset support plate 53 and the bracket 54 can be driven to move upward or downward through the threaded connection with the reset support plate 53; and the reset support plate 53 and the second threaded rod 52 have a self-locking function under the threaded connection, that is, when the third motor 51 is not started, the corresponding reset support plate 53 is in a fixed state; when it is necessary to reset the reset support plate 53, the anti-fall device 9, etc., the reset support plate 53 can be moved upward by starting the third motor 51, and when the reset support plate 53 moves upward and contacts the cylindrical cam 41, the reset support plate 53 continues to move upward, which will drive the cylindrical cam 41 to move upward, and when the cylindrical cam 41 moves upward, it will drive the first disc 47 to rotate. The corresponding driving pin 39 moves forward, the first supporting seat 19 moves backward to close the blocking device, and the ratchet wheel 21 moves backward to disengage from the pawl 22. At this time, the anti-fall rope 10 wound on the outer surface of the winding drum 26 will be retracted into the anti-fall device 9 under the action of the winding spring of the anti-fall device 9. After the driving pin 39 is disengaged from the irregular cam 13, the corresponding test plate 4 will fall onto the bracket 54. At this time, the reset bracket 53 is controlled to move downward, so that the test plate 4 can be moved downward and reset to the bottom position, and the anti-fall device 9 is retracted. The whole device can be tested repeatedly in a cycle, and can test multiple point positions of multiple lengths of the preventer, thereby improving the test accuracy, and the operation is convenient and the test efficiency is high.

[0056] When the present invention is in use, by placing and fixing the anti-fall hook 11 on the winding drum 26, when the irregular cam 13 rotates, it can drive the corresponding test plate 4, the winding drum 26, and the anti-fall hook 11 to slowly move upward and then move downward freely by falling. When moving slowly upward, the anti-fall device 9 can reel in the anti-fall rope 10. When the winding drum 26, the test plate 4, and the anti-fall hook 11 move downward freely by falling, the anti-fall device 9 can be tested, so that the self-locking function on the anti-fall device 9 is opened, and the anti-fall rope 10, the anti-fall hook 11, the winding drum 26, and the test plate 4 are locked. The position is locked and positioned, that is, the impact test is performed on the fall arrester 9. By setting the irregular cam 13 and cooperating with the driving pin 39, the test plate 4 and the winding drum 26 can be made to move irregularly for multiple times, so that a multi-point test can be performed on a specified length segment of the fall arrester 9. Through the rotatable winding drum 26, the anti-fall rope 10 can be wound, that is, the anti-fall rope 10 in the fall arrester 9 can be pulled out, that is, the specified length segment of the anti-fall rope 10 can be tested, and multiple point positions of multiple segment lengths of the fall arrester can be tested, thereby improving the test accuracy, and the operation is convenient and the test efficiency is high.

[0057] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A device for testing the anti-fall performance of a fall arrester, comprising a base plate (1), characterized in that: The upper end of the bottom plate (1) is provided with a top plate (5), the lower end of the top plate (5) is provided with a fall arrester (9), the lower end of the fall arrester (9) is provided with an fall arrester rope (10), and the lower end of the fall arrester rope (10) is provided with an fall arrester hook (11); the upper end surface of the bottom plate (1) is provided with a plurality of long guide rods (2), the outer surface of the plurality of long guide rods (2) is sleeved with a test plate (4), the upper end of the test plate (4) is provided with a reel (26) which can rotate and cooperate with the fall arrester hook (11), one side of the upper end of the bottom plate (1) is also provided with a rotatable irregular cam (13), the lower end of the test plate (4) is provided with a driving pin (39) which cooperates with the irregular cam (13), and when the irregular cam (13) rotates, it can form a structure in which the test plate (4) moves slowly upward and then moves freely downward in an irregular motion; The upper surface of the test plate (4) is fixedly connected to a second motor (15), the output end of the second motor (15) is fixedly connected to a worm (16), the upper end of the worm (16) is meshed with a worm wheel (17), and the inner wall at the center of the worm wheel (17) is fixedly connected to a first rotating shaft (18) rotatably connected to the test plate (4); a winding drum (26) is installed at the output end of the first rotating shaft (18), the inner wall of the winding drum (26) is provided with a through groove (28), and the inner wall of the through groove (28) is provided with a blocking device that matches the anti-fall rope (10); the upper surface of the base plate (1) is also fixedly connected to a first motor (12), the irregular cam (13) is fixedly connected to the output end of the first motor (12), and the irregular cam (13) is provided with a plurality of special-shaped protrusions that match the driving pin (39).

2. The anti-falling performance testing device of a fall arrester according to claim 1, characterized in that: The upper end surface of the top plate (5) is provided with a rotatable first threaded rod (6), the outer surface of the first threaded rod (6) is threadedly connected with a first threaded cylinder (7), and the fall arrester (9) is detachably mounted on the lower end of the first threaded cylinder (7).

3. The anti-falling performance testing device of a fall arrester according to claim 1, characterized in that: The blocking device comprises two square boxes (33), which are respectively mounted on the inner walls at the left and right ends of the through slot (28), the inner walls of the square boxes (33) are respectively slidably connected with trapezoidal wedges (31), and the inner walls at the bottom ends of the square boxes (33) are respectively fixedly connected with first springs (32) matched with the trapezoidal wedges (31).

4. A device for testing the anti-falling performance of a fall arrester as claimed in claim 3, characterized in that: The upper and lower end surfaces of the square box (33) are respectively fixedly connected with guide pins (37), and the inner walls on both sides of the groove (28) are respectively provided with inclined grooves (38) matching with the guide pins (37). The test plate (4) is also provided with a first support seat (19) that can move forward and backward, and the inner wall of the first support seat (19) is rotatably connected with a connecting disk (20). The inner walls at both ends of the groove (28) are also slidably connected with pull rods (35), and the front end surfaces of the pull rods (35) are respectively fixedly connected with connecting plates (34). The square boxes (33) are respectively slidably connected to the corresponding connecting plates (34), and the rear end surfaces of the pull rods (35) are respectively fixedly connected with arc-shaped sliders (36) slidably connected with the connecting disk (20).

5. The anti-falling performance testing device of a fall arrester according to claim 4, characterized in that: A ratchet (21) is fixedly connected to the front end surface of the connecting disk (20), and the connecting disk (20) is slidably connected to the outer surface of the first rotating shaft (18). A supporting disk (27) is fixedly connected to the inner wall at the center of the winding drum (26), and two centrally symmetrical ratchet claws (22) that match the ratchet (21) are hinged on the supporting disk (27). Two supporting pins (25) are respectively fixedly connected to the end surface of one side of the supporting disk (27), and third springs (23) that match the ratchet claws (22) are respectively fixedly connected to the supporting pins (25). A large spring (56) that matches the connecting disk (20) is sleeved on the outer surface of the first rotating shaft (18).

6. The anti-falling performance testing device of a fall arrester according to claim 4, characterized in that: The lower end of the test plate (4) is provided with a rotatable first disk (47), and two centrally symmetrical first connecting rods (48) are hingedly connected to the non-center portion of the lower end surface of the first disk (47). The lower end surface of the test plate (4) is slidably connected with a square slider (40), and the square slider (40) and the first support seat (19) are respectively hinged on the corresponding first connecting rods (48). The lower end surface of the test plate (4) is also fixedly connected with a spring stop seat (50), and a second spring (49) matching the square slider (40) is fixedly connected to one side end surface of the spring stop seat (50), and the driving pin (39) is fixedly connected to the square slider (40).

7. A device for testing the anti-falling performance of a fall arrester according to claim 6, characterized in that: The lower end surface of the test plate (4) is fixedly connected with four evenly distributed short guide rods (43), the outer surface of the four short guide rods (43) is sleeved with a cylindrical cam (41) that can move up and down, the inner wall of the cylindrical cam (41) is provided with two sections of centrally symmetrical arc-shaped sliding grooves (45), and the lower end of the first disc (47) is coaxially fixedly connected with a long pin (46) that matches the arc-shaped sliding groove (45).

8. The anti-falling performance testing device of a fall arrester according to claim 1, characterized in that: Two screw-through rods (57) are fixedly connected to the left and right sides of the upper end surface of the test plate (4), and a plurality of counterweights (14) are sleeved on the outer surfaces of the two screw-through rods (57). Nuts (58) are also threadedly connected to the outer surfaces of the screw-through rods (57).

9. The anti-falling performance testing device of a fall arrester according to claim 1, characterized in that: A third motor (51) is fixedly connected to the left and right sides of the upper end surface of the bottom plate (1), and the output ends of the third motor (51) are fixedly connected to second threaded rods (52). A reset support plate (53) is threadedly connected to the outer surfaces of the two second threaded rods (52), and brackets (54) are fixedly connected to the left and right sides of the upper end surface of the reset support plate (53).

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