Lever block testing device

Abstract

The utility model provides a lever block testing device which comprises a cabinet body, a driving motor, an elevator, a simulation swing arm, a fixed pulley support, a tension spring, a tension limiting frame and a control box, the driving motor and the elevator are located at the top of the cabinet body, the simulation swing arm is connected with the driving motor through a transmission shaft, and a clamp is arranged at the front end of the simulation swing arm; the fixed pulley support is located on one side of the bottom of the box body, the tension spring is located above the fixed pulley support, a liftable sample hook is arranged above the fixed pulley support, the upper end of the tension spring is hung on the top of the cabinet body, the bottom end of the tension spring is connected with the sample hook through a steel wire rope, and a movable induction block is arranged on the steel wire rope. And a stroke sensor is arranged on the tension limiting frame. The device has the advantages of being safe to use, high in test efficiency, accurate in test data, small in occupied area and simple and convenient to operate.

Description

Technical Field

[0001] This utility model relates to the field of safety tool testing equipment, and in particular to a test device for a lever hoist. Background Technology

[0002] Hand lever hoists are portable and can be used for lifting, lowering, and pulling operations, making them widely used in equipment installation, lifting of goods, and pulling of machine parts. After maintenance or new purchase, hand lever hoists need to be tested to check whether their lifting and lowering functions are normal, whether there are any jamming or jumping phenomena, and whether the braking system is sensitive and effective, ensuring the flexibility and reliability of the mechanism. Existing hand lever hoist no-load testing devices have problems such as not being able to guarantee user safety during the test, not being able to promptly alert operators when problems occur, and having a large footprint. For example, patent CN112014084A discloses a hand lever hoist testing device with an open U-shaped frame structure, where the drive components are placed side-by-side on the side. If jamming occurs during the test, user safety cannot be guaranteed, and the side placement of the drive components increases the footprint. Therefore, it is necessary to provide a hand lever hoist testing device to solve the above-mentioned technical problems. Summary of the Invention

[0003] This utility model provides a test device for a lever hoist. The device adopts a vertical enclosed cabinet structure and has the advantages of safe use, high testing efficiency, accurate test data, small footprint, and simple operation.

[0004] The present invention adopts the following technical solution:

[0005] A test device for a lever hoist, characterized in that it includes a cabinet, a drive motor, a hoist, a simulated swing arm, a fixed pulley bracket, a tension spring, a tension limit frame, and a control box. The cabinet is a rectangular vertical cabinet. The drive motor and the hoist are located at the top of the cabinet. The simulated swing arm is connected to the drive motor via a transmission shaft. The hoist is used to lift the lever hoist test sample. The front end of the simulated swing arm is equipped with a clamp for clamping the lever hoist handle. The fixed pulley bracket is located on one side of the bottom of the cabinet, and the tension spring is located above the fixed pulley bracket. A liftable sample hook is provided above the pulley bracket. The upper end of the tension spring is suspended from the top of the cabinet, and the lower end of the tension spring is connected to the sample hook via a steel wire rope. The steel wire rope passes around the fixed pulley group on the fixed pulley bracket, converting the upward tension of the tension spring into a downward tension of the steel wire rope on the sample hook. A movable sensing block is provided on the steel wire rope. The tension limit frame is located on the side of the fixed pulley bracket, and multiple stroke sensors arranged vertically on the tension limit frame are used to detect the position of the movable sensing block. The control box is connected to the drive motor, stroke sensors, and hoist via wiring.

[0006] Furthermore, the simulated swing arm is a crank-type swing arm.

[0007] Furthermore, the control box is suspended outside the cabinet using a hanging shaft.

[0008] Furthermore, a storage box is provided on the side of the fixed pulley bracket at the bottom of the cabinet, and universal pulleys are installed on the bottom surface of the cabinet.

[0009] Furthermore, the control box is equipped with a touch panel on the outside and a microcontroller control board on the inside. The microcontroller control board receives signals from the travel sensor and controls the start and stop of the drive motor according to the signals.

[0010] This utility model has the following beneficial effects:

[0011] This invention uses a drive motor to drive a simulated swing arm, which in turn drives the handle of a lever hoist to swing, simulating the action of a human arm swinger. It can replace manual swinging, has a simple structure, is easy to control, and can more efficiently complete no-load tests on lever hoists. This invention adopts a vertical enclosed cabinet structure, with the drive motor and simulated swing arm located at the top of the cabinet, greatly saving the floor space of the testing equipment. The test is conducted inside the cabinet, ensuring the safety of the personnel. After connecting the hook of the lever hoist to the hook of this invention, multi-level load capacity tests of the lever hoist can be completed, achieving multiple uses in one machine and reducing equipment investment costs. The control box automatically controls the start and stop of the drive motor based on the signal from the stroke sensor, ensuring standardized test operation and accurate and effective test data. Attached Figure Description

[0012] Figure 1 This is a cross-sectional structural diagram of the present invention.

[0013] Figure 2 This is a schematic diagram of the external structure of this utility model.

[0014] The corresponding component names in the diagram are: 1. Cabinet; 2. Drive motor; 3. Hoist; 4. Simulated swing arm; 5. Fixed pulley bracket; 6. Tension spring; 7. Tension limit bracket; 8. Control box; 9. Clamp; 10. Sample hook; 11. Wire rope; 12. Motion sensor block; 13. Stroke sensor; 14. Storage box; 15. Universal pulley; 16. Hanging shaft; 17. Fixed pulley block; 100. Hand lever hoist sample. Detailed Implementation

[0015] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific implementation methods, structures, and features of this utility model are described in detail below with reference to the accompanying drawings and preferred embodiments. However, the accompanying drawings are for reference and illustration only and are not intended to limit this utility model. Example

[0016] Please see Figures 1 to 2 As shown, a test device for a lever hoist includes a cabinet 1, a drive motor 2, a hoist 3, a simulated swing arm 4, a fixed pulley bracket 5, a tension spring 6, a tension limit bracket 7, and a control box 8. The cabinet is a rectangular vertical enclosed cabinet. The drive motor 2 and the hoist 3 are located at the top of the cabinet. The simulated swing arm 4 is connected to the drive motor 2 via a transmission shaft. The hoist 3 is used to lift the lever hoist test sample 100. The front end of the simulated swing arm 4 is provided with a clamp 9 for clamping the lever hoist handle. The fixed pulley bracket 5 is located on one side of the bottom of the cabinet, and the tension spring 6 is located on the fixed pulley bracket 5. The cabinet has a liftable sample hook 10 above the fixed pulley bracket. The upper end of the tension spring is suspended from the top of the cabinet, and the lower end of the tension spring is connected to the sample hook via a steel wire rope 11. The steel wire rope passes around the fixed pulley group 17 on the fixed pulley bracket 5, converting the upward tension of the tension spring 6 into a downward tension of the steel wire rope on the sample hook. A movable sensing block 12 is provided on the steel wire rope. The tension limit frame is located on the side of the fixed pulley bracket, and multiple stroke sensors 13 arranged vertically on the tension limit frame are used to detect the position of the movable sensing block. The control box 8 is connected to the drive motor, stroke sensors, and lifting mechanism via wiring. The simulated swing arm is a crank-type swing arm. The control box 8 is suspended outside the cabinet using a hanging shaft 16. A storage box 14 is provided on the side of the fixed pulley bracket 5 at the bottom of the cabinet, and universal casters 15 are installed on the bottom surface of the cabinet. The control box has a touch panel on the outside and a microcontroller control board inside. The microcontroller control board receives signals from the stroke sensors and controls the start and stop of the drive motor according to the signals.

[0017] The working process of this utility model is as follows: First, the hoist test specimen 100 is hoisted to the top of the cabinet using the hoist 3. The handle of the hoist test specimen 100 is clamped by the clamp 9 at the front end of the simulated swing arm 4. During the no-load test, the hook of the hoist test specimen is not connected to the test specimen hook 10. The drive motor drives the simulated swing arm to swing, which in turn drives the handle of the hoist test specimen to swing, simulating the human arm swinging action, replacing manual swinging, and efficiently completing the no-load test of the hoist. During the load test, the hook of the test specimen hoist is connected to the test specimen hook 10. A novel sample hook is used for connection. The drive motor is started, causing the handle of the lever hoist sample to swing. The sample hook pulls the wire rope, causing the moving sensor block 12 to move downwards. The tension spring 6 slowly applies tension to the wire rope. When the moving sensor block 12 moves to the position of the set range travel sensor 13, the travel sensor 13 sends a signal to the microcontroller control board of the control box 8. The microcontroller control board then controls the drive motor 2 to stop running. The lever hoist sample is then reset, and the operation is repeated to complete multiple load tests according to the test specifications. The control box automatically controls the start and stop of the drive motor based on the travel sensor signal. The test operation is standardized, and the test data is accurate and effective. This utility model features a cabinet with a closable door. During the test, the door is closed, and the test is conducted inside the cabinet, ensuring the safety of the personnel.

[0018] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to the above embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A test device for a lever hoist, characterized in that: The system includes a cabinet, a drive motor, a hoist, a simulated swing arm, a fixed pulley bracket, a tension spring, a tension limit bracket, and a control box. The cabinet is a rectangular vertical cabinet. The drive motor and hoist are located at the top of the cabinet. The simulated swing arm is connected to the drive motor via a drive shaft. The hoist is used to lift the hand-operated lever hoist sample. The front end of the simulated swing arm is equipped with a clamp for gripping the handle of the hand-operated lever hoist. The fixed pulley bracket is located on one side of the bottom of the cabinet, and the tension spring is located above the fixed pulley bracket. A control box is located above the fixed pulley bracket. The lifting sample hook has its upper end suspended from the top of the cabinet by a tension spring, and its lower end connected to the sample hook by a steel wire rope. The steel wire rope passes around a fixed pulley assembly on a fixed pulley bracket, converting the upward tension of the tension spring into a downward tension on the sample hook. A movable sensing block is installed on the steel wire rope. The tension limit frame is located on the side of the fixed pulley bracket, and multiple stroke sensors arranged vertically on the tension limit frame are used to detect the position of the movable sensing block. The control box is connected to the drive motor, stroke sensors, and hoist via wiring.

2. The hand-operated lever hoist testing device according to claim 1, characterized in that: The simulated swing arm is a crank-type swing arm.

3. The hand-operated lever hoist testing device according to claim 1, characterized in that: The control box is suspended from the outside of the cabinet using a hanging shaft.

4. The hand-operated lever hoist testing device according to claim 1, characterized in that: A storage box is provided on the side of the fixed pulley bracket at the bottom of the cabinet, and universal pulleys are installed on the bottom surface of the cabinet.

5. The hand-operated lever hoist testing device according to claim 1, characterized in that: The control box has a touch panel on the outside and a microcontroller control board on the inside.

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