An elevator safety clamp wedge performance testing machine

Abstract

The invention discloses an elevator safety clamp wedge performance tester, characterized in that it comprises a frame (1), a motor (2), a transmission mechanism, a counterweight mechanism, a test turntable (3), a test lever assembly, a weight assembly, a buffer bracket assembly, a turning assembly, a release mechanism, and a material pusher sensor; the buffer bracket assembly is located at the test lever assembly, the release mechanism is located below the test lever assembly, the material pusher sensor is located at the edge of the safety clamp wedge to be tested, the release mechanism is connected to the test lever assembly, the turning assembly is installed on the frame, and the turning tool head contacts the outer side wall of the test turntable (3) after moving. The tester simulates the most realistic elevator use conditions, brakes the braking surface of the safety clamp wedge against the side wall of the rotating turntable for testing, and can process the side wall of the turntable after each test.

Description

Technical Field

[0001] The invention relates to the technical field of elevator equipment testing, in particular to an elevator safety clamp wedge performance testing machine. Background Art

[0002] The elevator safety clamp is a safety device that brings the elevator car to an emergency stop and clamps it to the guide rails when the speed exceeds the speed limit set by the speed limiter, or when the suspension rope breaks or slackens. It provides effective protection for the safe operation of the elevator. The core component of the elevator safety clamp is the safety clamp wedge. During braking, a pair of safety clamp wedges clamp the elevator guide rails, bringing the car to an emergency stop.

[0003] Safety clamp wedges need to be tested before they are put into use, such as for stability, reliability and durability. The conventional method is to simulate the actual operating conditions of the elevator for testing, that is, the car moves vertically up and down. Although this can achieve the most realistic test conditions, it has a very big disadvantage. After each test, the guide rails will be worn due to braking, and basically need to be replaced with new ones every time, which is too costly.

[0004] Currently, a technical field of safety clamp device testing is disclosed, including a test bench and test method for an elevator safety clamp device. The test bench includes a platform; a first tension source connected to two wedges of the safety clamp device; a first tension detection device disposed between the first tension source and the wedge; a pressure detection device located between the two wedges of the safety clamp device; a second tension source connected to one end of the pressure detection device; a second tension detection device disposed between the second tension source and the pressure detection device; and a displacement detection device disposed between the second tension source and the second tension detection device. The first tension source simulates a speed limiter, and the second tension source simulates an elevator car. Through the above-mentioned detection devices, corresponding information can be obtained, and a corresponding information curve can be drawn by a controller to determine whether the safety clamp device is qualified. The test of the above-mentioned structure is a test of the entire safety clamp, rather than a performance test of the wedge alone.

[0005] The existing technology has automobile brake pad testing equipment, but this equipment also simulates the actual use conditions of the car, and brakes by clamping a set of brake pads to the brake disc. In other words, the end face of the brake pad is in close contact with the end face of the brake disc to achieve braking. However, this similar structure cannot provide the real simulation conditions of the elevator safety clamp, which is also a major technical difficulty to be solved in this field. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide an elevator safety clamp wedge performance testing machine which simulates the most realistic elevator use conditions, brakes the braking surface of the safety clamp wedge against the side wall of a rotating turntable for testing, and can process the side wall of the turntable after each test.

[0007] The technical solution of the present invention is to provide an elevator safety clamp wedge performance tester with the following structure, including a frame, a motor, a transmission mechanism, a counterweight mechanism, a test turntable, a test lever assembly, a weight assembly, a buffer bracket assembly, a turning assembly, a release mechanism and a push sensor; the motor is connected to the test turntable through the transmission mechanism, the counterweight mechanism is connected to the transmission mechanism, the fulcrum of the test lever assembly is located at one end, the weight assembly is located on the power arm and at one end of the test lever assembly, the safety clamp wedge to be tested is located on the resistance arm and at the middle of the test lever assembly, the buffer bracket assembly is located below the test lever assembly, the release mechanism is located below the test lever assembly, the push sensor is connected to the test lever assembly, the turning assembly The component is installed on the frame and the turning tool head contacts the outer side wall of the test turntable after moving; in the initial state, the release mechanism supports the test lever assembly, and the tested safety clamp wedge is located above the test turntable; in the test state, the power mechanism drives the test turntable to rotate, and the release mechanism is released at the same time. The test lever assembly swings downward around the fulcrum under the action of the weight assembly, driving the tested safety clamp wedge to be tightly attached to the side wall of the test turntable until the test turntable is braked, and at the same time the push sensor transmits the reaction force of the tested safety clamp wedge to the main controller; after the test is completed, the test lever assembly swings upward to move the tested safety clamp wedge to the top of the test turntable, and at the same time the blade of the turning assembly moves to the outer wall of the test turntable, and the outer wall of the test turntable is turned and reset.

[0008] The transmission mechanism includes a main drive shaft, a first main shaft, and a second main shaft; the main drive shaft is connected to a motor, the motor is a reduction motor, a first belt gear is provided on the main drive shaft, and the second belt gear on the first main shaft is driven by a belt, the counterweight mechanism is coaxially installed at one end of the first main shaft, the third belt gear on the first main shaft and the fourth belt gear on the second main shaft pass through the belt, and the test turntable is coaxially installed on the second main shaft; the rotational inertia of the test turntable is adjusted by adjusting the weight of the counterweight mechanism.

[0009] The test lever assembly includes a test lever and a rotating fulcrum; the test lever is located above the test turntable, the weight assembly is located on the power arm and at one end of the test lever, and the rotating fulcrum is located at the other end of the test lever. The safety clamp wedge to be tested is installed in a clamp in the middle of the test lever. During the test, the weight assembly moves downward and pulls the test lever to swing downward around the rotating fulcrum, so that the safety clamp wedge to be tested is in close contact with the side wall of the test turntable.

[0010] The weight assembly includes a weight mounting rod, a weight, a balance rod and a support rod; the top of the weight mounting rod is rotatably connected to the end of the power arm of the test lever assembly, the weight is arranged on the weight mounting rod and is adjusted according to the required weight, one end of the balance rod is rotatably connected to the bottom end of the weight mounting rod, and the other end is rotatably connected to the support rod, and the support rod is connected to the frame.

[0011] The release mechanism includes a support frame, a release rod and a positioning plate. The support frame is provided with an upward notch. The lever of the test lever assembly is movably embedded in the notch of the support frame. The middle part of the release rod passes through the positioning hole on the positioning block on the positioning plate. The top of the front end of the release rod is against the bottom surface of the lever of the test lever assembly in the notch. The top of the front end of the release rod is rotatably connected to the support frame through a rotating shaft. When released, the tail end of the release rod swings upward, so that the front end of the release rod is separated downward from the bottom surface of the lever of the test lever assembly, thereby causing the lever of the test lever assembly to swing downward.

[0012] The buffer bracket assembly comprises a gas spring and a fixing seat, wherein the fixing seat is arranged on the frame, and the gas spring is installed on the clamping sleeve at the front end of the fixing seat and its position is adjusted up and down.

[0013] The counterweight mechanism comprises a plurality of counterweight discs, each of which is coaxially mounted on the second main shaft and axially locked and fixed by a compression sleeve.

[0014] The turning assembly includes a sliding shell, a fixed seat, a chuck, a sliding shaft and a turning tool. The fixed seat is installed on the frame, the axis of the sliding shaft is parallel to the axis of the test turntable, the sliding shaft moves through the hole of the fixed seat, the sliding shell is located at the tail end of the sliding shaft, the chuck is located at the front end of the sliding shaft, and the turning tool is fixed on the chuck; during turning, the sliding shell pushes the sliding shaft forward so that the turning tool at the front end turns the outer wall of the test turntable parallel to the axis of the test turntable.

[0015] The lever of the test lever assembly extends outward along the other end of the fulcrum, and the push sensor is located below the extended portion. The push sensor is fixed to the frame through a bracket, and the sensing contact of the push sensor contacts the bottom surface of the lever of the test lever assembly.

[0016] After adopting the above structure, the present invention has the following advantages:

[0017] 1. The vertical up and down motion is converted into circular motion of the turntable, and the side wall of the turntable is simulated as the sliding surface of the guide rail. The test lever assembly and weight assembly apply pressure to the safety gear wedge, causing the tested safety gear wedge to adhere tightly to the side wall of the turntable to achieve braking, thereby simulating the braking process of the safety gear and the guide rail, providing the most realistic elevator operating conditions.

[0018] 2. By adjusting the weight of the weight assembly, the pressure applied by the safety clamp wedge can be adjusted.

[0019] 3. The rotational inertia of the test turntable can be adjusted by adjusting the weight of the counterweight mechanism, thereby simulating the impact inertia of the car when it falls.

[0020] 4. A buffer bracket assembly is added and arranged below the test lever assembly, thereby preventing the weight assembly from suddenly impacting the test lever assembly and effectively protecting the test lever assembly.

[0021] 5. The push sensor transmits the reaction force of the safety clamp wedge to the main controller, which can provide the most direct test data.

[0022] 6. After the test is completed, the blade of the turning assembly moves to the outer wall of the test turntable, and the outer wall of the test turntable is turned and then reset, so that the outer wall of the turntable is smooth and flat after the test, eliminating the braking marks generated during the test, avoiding replacement every time, and effectively reducing the test cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the elevator safety clamp wedge performance testing machine of the present invention.

[0024] Figure 2 The figure is a schematic diagram of the framework of the elevator safety clamp wedge performance testing machine of the present invention.

[0025] Figure 3 It is a schematic diagram of the connection between the test lever assembly and the weight assembly of the present invention.

[0026] Figure 4 Schematic diagram of the release mechanism of the present invention.

[0027] Figure 5 Schematic diagram of the buffer bracket assembly of the present invention.

[0028] Figure 6 Schematic diagram of the turning assembly of the present invention.

[0029] Shown in the figure: 1. Frame, 2. Motor, 3. Test turntable, 4. Main drive shaft, 5. First spindle, 6. Second spindle, 7. First belt gear, 8. Second belt gear, 9. Third belt gear, 10. Fourth belt gear, 11. Test lever, 12. Rotation fulcrum, 13. Weight mounting rod, 14. Weight, 15. Balance rod, 16. Support rod, 17. Support frame, 18. Release rod, 19. Positioning plate, 20. Gas spring, 21. Fixed seat, 22. Counterweight disc, 23. Sliding shell, 24. Fixed seat, 25. Chuck, 26. Sliding shaft, 27. Push sensor. DETAILED DESCRIPTION

[0030] The present invention will be further described below with reference to the accompanying drawings.

[0031] like Figure 1-6 As shown, the elevator safety clamp wedge performance testing machine of the present invention includes a frame 1, a motor 2, a transmission mechanism, a counterweight mechanism, a test turntable 3, a test lever assembly, a weight assembly, a buffer bracket assembly, a turning assembly, a release mechanism and a push sensor.

[0032] The motor 2 is connected to the test turntable 3 through a transmission mechanism, the counterweight mechanism is connected to the transmission mechanism, the fulcrum of the test lever assembly is located at one end, the weight assembly is located on the power arm and at one end of the test lever assembly, the safety clamp wedge to be tested is located on the resistance arm and at the middle of the test lever assembly, the buffer bracket assembly is located below the test lever assembly, the release mechanism is located below the test lever assembly, the push sensor is connected to the test lever assembly, the release mechanism is connected to the test lever assembly, the turning assembly is installed on the frame and the turning tool head contacts the outer wall of the test turntable 3 after moving.

[0033] like Figure 2 As shown, the transmission mechanism includes a main drive shaft 4, a first spindle 5, and a second spindle 6. The main drive shaft 4 is connected to the motor 2, which is a reduction motor. The main drive shaft 4 is provided with a first belt gear 7, and the second belt gear 8 on the first spindle 5 is driven by a belt. The counterweight mechanism is coaxially mounted on one end of the first spindle 5. A third belt gear 9 on the first spindle 5 and a fourth belt gear 10 on the second spindle 6 are passed through by a belt. The test turntable 3 is coaxially mounted on the second spindle 6. The moment of inertia of the test turntable 3 is adjusted by adjusting the weight of the counterweight mechanism. The belt connecting the belt gears is not shown in the figure.

[0034] like Figure 3As shown, the test lever assembly includes a test lever 11 and a pivot 12; the test lever 11 is located above the test turntable 3. The power arm and resistance arm of the test lever 11 are located on the same side of the pivot. The weight assembly is located on the power arm and at one end of the test lever 11, namely, on the resistance arm. The pivot 12 is located at the other end of the test lever 11. The safety clamp wedge to be tested is mounted in a fixture 13 in the middle of the test lever 11. During testing, the weight assembly moves downward, pulling the test lever 11 to swing downward about the pivot 12, causing the safety clamp wedge to be tested to tightly contact the side wall of the test turntable 3.

[0035] like Figure 3 As shown, the weight assembly includes a weight mounting rod 13, a weight 14, a balance rod 15 and a support rod 16; the top of the weight mounting rod 13 is rotatably connected to the end of the power arm of the test lever assembly, and the weight 14 is arranged on the weight mounting rod 13 and is adjusted according to the required weight. Multiple weights 14 can be placed as needed so that the test lever 11 can swing downward, thereby making the safety clamp wedge being tested close to the side wall of the turntable 3. One end of the balance rod 15 is rotatably connected to the bottom end of the weight mounting rod 13, and the other end is rotatably connected to the support rod 16, and the support rod 16 is connected to the frame 1. The balance rod 15 plays the role of positioning the bottom end of the weight mounting rod 13, preventing the weight mounting rod 13 and the weight 14 from shaking left and right when moving downward, affecting the test effect. When the weight mounting rod 13 moves up and down, it drives the balance rod 15 to swing up and down around the support rod 16.

[0036] like Figure 4 As shown, the release mechanism includes a support frame 17, a release rod 18 and a positioning plate 19. The support frame 17 is provided with an upward notch, and the lever of the test lever assembly is movably embedded in the notch of the support frame 17. The middle part of the release rod 18 passes through the positioning hole on the positioning block 19 on the positioning plate 19. The top of the front end of the release rod 18 is against the bottom surface of the lever of the test lever assembly in the notch. The top of the front end of the release rod 18 is rotatably connected to the support frame 17 through a rotating shaft. When released, the tail end of the release rod 18 swings upward, so that the front end of the release rod 18 is separated downward from the bottom surface of the lever of the test lever assembly, thereby causing the lever of the test lever assembly to swing downward.

[0037] like Figure 5 As shown, the buffer bracket assembly comprises a gas spring 20 and a fixing seat 21 , wherein the fixing seat 21 is provided on the frame 1 , and the gas spring 20 is installed on a clamping sleeve 22 at the front end of the fixing seat 21 and its position is adjusted up and down.

[0038] The counterweight mechanism includes a plurality of counterweight discs 22 , each of which is coaxially mounted on the second main shaft 6 and axially locked and fixed by a compression sleeve.

[0039] like Figure 6 As shown, the turning assembly includes a sliding shell 23, a fixed seat 24, a clamping head 25, a sliding shaft 26 and a turning tool. The fixed seat 24 is installed on the frame 1, and the axis of the sliding shaft 26 is parallel to the axis of the test turntable 3. The sliding shaft 26 moves through the hole of the fixed seat 24. The sliding shell 23 is located at the tail end of the sliding shaft 26, and the clamping head 25 is located at the front end of the sliding shaft 26. The turning tool is fixed on the clamping head 25; during turning, the sliding shell 23 pushes the sliding shaft 26 to move forward, so that the turning tool at the front end is parallel to the axis of the test turntable 3 and turns the outer wall of the test turntable 3.

[0040] The lever of the test lever assembly extends outward along the other end of the fulcrum, and the push sensor is located below the extended portion. The push sensor is fixed to the frame 1 through a bracket, and the sensing contact of the push sensor contacts the bottom surface of the lever of the test lever assembly.

[0041] In the initial state, the lower side of the test lever 11 is supported by the release rod 18 , and at this time, the safety gear wedge to be tested is located above the test turntable 3 .

[0042] In the test state, motor 2 starts, driving test turntable 3 to rotate through the transmission mechanism. Simultaneously, the release mechanism is disengaged, causing release rod 18 to swing downward. Test lever 11 loses its support and, under the action of weight 14, swings downward, pressing down on the piston rod of gas spring 20. This, in turn, drives the safety gear wedge under test into close contact with the sidewall of test turntable 3 until it brakes. Simultaneously, the push sensor transmits the reaction force of the safety gear wedge under test to the main controller.

[0043] After the test is completed, the test lever assembly swings upward to move the tested safety clamp wedge to the top of the test turntable 3, and at the same time the blade of the turning assembly moves to the outer wall of the test turntable 3, and the outer wall of the test turntable 3 is turned and reset.

Claims

1. An elevator safety clamp wedge performance testing machine, characterized by: The invention comprises a frame (1), a motor (2), a transmission mechanism, a counterweight mechanism, a test turntable (3), a test lever assembly, a weight assembly, a buffer bracket assembly, a turning assembly, a release mechanism and a push sensor; the motor (2) is connected to the test turntable (3) through the transmission mechanism, the counterweight mechanism is connected to the transmission mechanism, the fulcrum of the test lever assembly is located at one end, the weight assembly is located on the power arm and at one end of the test lever assembly, the safety clamp wedge to be tested is located on the resistance arm and at the middle of the test lever assembly, the buffer bracket assembly is located at the test lever assembly, the release mechanism is located below the test lever assembly, the push sensor is located on the edge of the safety clamp wedge to be tested, the release mechanism is connected to the test lever assembly, the turning assembly is installed on the frame and the turning tool head contacts the outer wall of the test turntable (3) after moving; In the initial state, the release mechanism supports the test lever assembly, and the safety gear wedge to be tested is located above the test turntable (3); In the test state, the motor (2) drives the test turntable (3) to rotate through the transmission mechanism, and the release mechanism is released at the same time. The test lever assembly swings downward around the fulcrum under the action of the weight assembly, driving the safety clamp wedge to be tested to be in close contact with the side wall of the test turntable (3) until the test turntable (3) is braked. At the same time, the push sensor transmits the reaction force of the safety clamp wedge to the main controller; After the test is completed, the test lever assembly swings upward to move the safety clamp wedge to be tested above the test turntable (3), and at the same time, the blade of the turning assembly moves to the outer wall of the test turntable (3), and the outer wall of the test turntable (3) is turned and reset.

2. The elevator safety clamp wedge performance testing machine according to claim 1, characterized in that: The transmission mechanism comprises a main drive shaft (4), a first main shaft (5), and a second main shaft (6); the main drive shaft (4) is connected to a motor (2), the motor (2) is a reduction motor, a first belt gear (7) is provided on the main drive shaft (4), and a second belt gear (8) on the first main shaft (5) is driven by a belt, the counterweight mechanism is coaxially mounted on one end of the first main shaft (5), a third belt gear (9) on the first main shaft (5) and a fourth belt gear (10) on the second main shaft (6) pass through the belt, and the test turntable (3) is coaxially mounted on the second main shaft (6); the rotational inertia of the test turntable (3) is adjusted by adjusting the weight of the counterweight mechanism.

3. The elevator safety clamp wedge performance testing machine according to claim 1, characterized in that: The test lever assembly comprises a test lever (11) and a rotation fulcrum (12); the test lever (11) is located above the test turntable (3); the weight assembly is located on a power arm and at one end of the test lever (11); the rotation fulcrum (12) is located at the other end of the test lever (11); a safety clamp wedge to be tested is installed in a clamp (13) in the middle of the test lever (11); during testing, the weight assembly moves downward and pulls the test lever (11) to swing downward around the rotation fulcrum (12), so that the safety clamp wedge to be tested is in close contact with the side wall of the test turntable (3).

4. An elevator safety clamp wedge performance testing machine according to claim 1 or 3, characterized in that: The weight assembly comprises a weight mounting rod (13), a weight (14), a balance rod (15) and a support rod (16); the top of the weight mounting rod (13) is rotatably connected to the end of the power arm of the test lever assembly; the weight (14) is arranged on the weight mounting rod (13) and is adjusted according to the required weight; one end of the balance rod (15) is rotatably connected to the bottom end of the weight mounting rod (13), and the other end is rotatably connected to the support rod (16); and the support rod (16) is connected to the frame (1).

5. The elevator safety clamp wedge performance testing machine according to claim 1, characterized in that: The release mechanism includes a support frame (17), a release rod (18) and a positioning plate (19), the support frame (17) is provided with an upward notch, the lever of the test lever assembly is movably embedded in the notch of the support frame (17), the middle part of the release rod (18) passes through the positioning hole on the positioning block (19) on the positioning plate (19), the top of the front end of the release rod (18) is against the bottom surface of the lever of the test lever assembly in the notch, the top of the front end of the release rod (18) is rotatably connected to the support frame (17) through a rotating shaft, and when released, the tail end of the release rod (18) swings upward, so that the front end of the release rod (18) is separated downward from the bottom surface of the lever of the test lever assembly, thereby causing the lever of the test lever assembly to swing downward.

6. The elevator safety clamp wedge performance testing machine according to claim 1, characterized in that: The buffer bracket assembly comprises a gas spring (20) and a fixing seat (21), wherein the fixing seat (21) is arranged on the frame (1), and the gas spring (20) is mounted on a clamping sleeve (22) at the front end of the fixing seat (21) and its position is adjusted up and down.

7. An elevator safety clamp wedge performance testing machine according to claim 1 or 2, characterized in that: The counterweight mechanism comprises a plurality of counterweight discs (22), each of which is coaxially mounted on the second main shaft (6) and axially locked and fixed by a compression sleeve.

8. The elevator safety clamp wedge performance testing machine according to claim 1, characterized in that: The turning assembly comprises a sliding housing (23), a fixed seat (24), a chuck (25), a sliding shaft (26) and a turning tool, wherein the fixed seat (24) is mounted on the frame (1), the axis of the sliding shaft (26) is parallel to the axis of the test turntable (3), the sliding shaft (26) moves through the hole of the fixed seat (24), the sliding housing (23) is located at the rear end of the sliding shaft (26), the chuck (25) is located at the front end of the sliding shaft (26), and the turning tool is fixed on the chuck (25); during turning, the sliding housing (23) pushes the sliding shaft (26) to move forward, so that the turning tool at the front end is parallel to the axis of the test turntable (3) and turns the outer wall of the test turntable (3).

9. An elevator safety clamp wedge performance testing machine according to claim 1, 2 or 3, characterized in that: The lever of the test lever assembly extends outward along the other end of the fulcrum, and the push material sensor is located below the extended portion. The push material sensor is fixed to the frame (1) through a bracket, and the sensing contact of the push material sensor contacts the bottom surface of the lever of the test lever assembly.

Images