Automatic handle life testing device

Abstract

This utility model discloses an automatic handle lifespan testing device, including a housing and a testing platform. The testing platform is installed on the upper part of the housing and is equipped with a drive mechanism, a limiting mechanism, and a handle fixing mechanism. The drive mechanism includes a drive motor, a linear slide, a lead screw, a lever mounting base, and a lever. The lever mounting base is fixed to the lead screw of the slide, and the lever is positioned on the lever mounting base perpendicular to the direction of movement of the slide. The drive motor controls the lead screw to drive the lever to reciprocate, periodically pushing the handle grip. The limiting mechanism includes a set of photoelectric switches symmetrically installed at both ends of the slide's stroke to trigger the drive motor to reverse. The handle fixing mechanism is fixed to the surface of the housing and is used to clamp the handle to be tested. This technical solution achieves low-cost, high-precision, and high-safety handle lifespan testing through closed-loop control, modular design, and optimized human-machine interaction.

Description

Technical Field

[0001] This utility model relates to the field of testing tooling technology, specifically to an automatic testing device for the service life of a handle. Background Technology

[0002] In the field of construction machinery, the handle, as a core control component, directly affects the overall reliability and operational safety of the equipment. Current automated handle life testing equipment generally employs complex and costly drive systems, particularly traditional servo motors or pneumatic drives. While these can achieve reciprocating motion, they require manual replacement or adjustment of the mechanical structure to meet the diverse sizes, operating forces, and motion trajectory requirements of construction machinery handles, resulting in low testing efficiency. Furthermore, traditional equipment struggles to guarantee the reliability of test results when simulating the high-load conditions of handles in heavy equipment such as excavators and loaders. Therefore, there is an urgent need for a new testing device with a simplified structure, controllable cost, and adaptive adjustment capabilities to address the operational convenience issue in construction machinery handle life testing. Utility Model Content

[0003] This utility model aims to solve at least one of the technical problems existing in the prior art.

[0004] According to one aspect of this utility model, an automatic testing device for handle lifespan is provided, comprising a housing and a testing platform. The testing platform is installed on the upper part of the housing, and a driving mechanism, a limiting mechanism, and a handle fixing mechanism are provided on the testing platform. The driving mechanism includes a drive motor, a linear slide, a lead screw, a lever mounting base, and a lever. The lever mounting base is fixed to the lead screw of the slide, and the lever is arranged on the lever mounting base perpendicular to the direction of movement of the slide. The drive motor controls the lead screw to drive the lever to reciprocate, periodically pushing the handle grip. The limiting mechanism includes a set of photoelectric switches symmetrically installed at both ends of the slide's stroke, used to trigger the drive motor to reverse. The handle fixing mechanism is fixed to the surface of the housing and used to clamp the handle to be tested.

[0005] In some embodiments, the drive motor is a stepper motor.

[0006] According to the technical solution of this utility model, a stepper motor is used instead of a traditional servo motor, and a closed-loop control is formed by combining dual photoelectric switches, which significantly reduces hardware costs. At the same time, the photoelectric switches achieve stroke limit through non-contact sensing, avoiding the accuracy reduction problem caused by collision and wear of mechanical limit, and reducing maintenance costs.

[0007] In some embodiments, a power switch and an operation panel electrically connected to the test bench are provided on the surface of the housing for controlling the start and stop of the drive mechanism and setting test parameters.

[0008] In some embodiments, the operation panel is provided with a speed adjustment knob, which is connected to the drive motor signal and used to adjust the speed of the drive motor.

[0009] In some embodiments, an emergency stop button is also provided on the housing, which is electrically connected to the drive motor and is used to cut off the power supply to the drive motor in an emergency.

[0010] The testing device according to this utility model is equipped with an emergency stop button, which can directly cut off the power supply to the drive motor in an emergency to prevent equipment damage or personal injury caused by test abnormalities, and meets industrial safety standards.

[0011] In some embodiments, the lever and the lever mounting base are connected by a thread, and the end of the lever is provided with a buffer pad.

[0012] According to the present invention, the end of the lever is equipped with a buffer pad, which effectively reduces the impact force when pushing the handle, protects the structural integrity of the handle, and reduces vibration and noise interference during the test, ensuring the accuracy of the test data.

[0013] In some embodiments, the speed adjustment knob has a rotational speed adjustment range of 0.5-10Hz.

[0014] The speed adjustment knob on the control panel allows for precise control of the drive motor speed, simulating the handle's operating frequency under different usage scenarios and adapting to diverse testing needs. For example, low-speed testing can be used to evaluate the handle's long-term fatigue performance, while high-speed testing verifies its ultimate durability.

[0015] In some embodiments, an outer cover is provided outside the test bench on the housing, the outer cover being made of acrylic material.

[0016] The test bench enclosure is made of acrylic material, which combines high light transmittance and impact resistance, facilitating observation of the testing process while protecting the internal components. The acrylic enclosure can also be customized with openings or sensor integration to support future functional expansion.

[0017] In summary, the technical solution of this utility model replaces the high-cost servo system with a stepper motor and photoelectric switch, effectively reducing costs. Through the design of a buffer structure and adjustable parameters, it improves the applicability of testing. Combined with an emergency stop switch and acrylic outer casing protection, it ensures operational safety and equipment durability, making it widely applicable in industrial production line sampling inspection and R&D verification. Attached Figure Description

[0018] Figure 1 This is a front view schematic diagram of an automatic handle lifespan testing device according to an embodiment of the present invention.

[0019] Figure 2This is a side view schematic diagram of an automatic handle lifespan testing device according to an embodiment of the present invention.

[0020] Figure 3 This is a top view schematic diagram of an automatic handle lifespan testing device according to an embodiment of the present invention.

[0021] Figure 4 This is a perspective view of an automatic handle lifespan testing device according to an embodiment of the present invention.

[0022] In the diagram: 1. Housing; 2. Test bench; 3. Drive mechanism; 4. Limit mechanism; 5. Handle fixing mechanism; 31. Drive motor; 32. Linear slide; 33. Lead screw; 34. Lever mounting base; 35. Lever; 41. First photoelectric switch; 42. Second photoelectric switch; 6. Handle; 7. Power switch; 8. Operation panel; 9. Speed ​​adjustment knob; 10. Emergency stop button; 11. Buffer pad; 12. Outer cover. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figures 1 to 4 As shown, an automatic handle lifespan testing device according to an embodiment of this application includes a housing 1 and a testing platform 2, wherein the testing platform 2 is mounted on the upper part of the housing 1. A drive mechanism 3, a limiting mechanism 4, and a handle fixing mechanism 5 are provided on the testing platform 2.

[0025] The drive mechanism 3 includes a drive motor 31, a linear slide 32, a lead screw 33, a lever mounting base 34, and a lever 35. The lever mounting base 34 is fixed to the lead screw 33 of the slide 32, and the lever 35 is arranged on the lever mounting base 34 perpendicular to the direction of movement of the slide.

[0026] In one embodiment, the drive motor 31 is a stepper motor. The stepper motor 31 is used to control the lead screw 33 to drive the lever 35 to reciprocate, thereby periodically pushing the handle 6.

[0027] The lever 35 and the lever mounting base 34 are connected by threads, and the end of the lever 35 is provided with a buffer pad 11. The buffer pad can be made of flexible materials such as rubber or silicone.

[0028] The limiting mechanism 4 consists of a first photoelectric switch 41 and a second photoelectric switch 42, which are symmetrically installed at both ends of the travel of the slide table 32 and are used to trigger the drive motor to reverse. In some embodiments, the first photoelectric switch 41 and the second photoelectric switch 42 are fixed to the housing base plate by a slide rail mechanism.

[0029] In one embodiment, the stepper motor 31, the linear slide 32, the dual photoelectric switches 41 and 42, and the DM542T programmable driver constitute a closed-loop control system. The system is connected to the main board control system through the X0 / X1 input points of the PLC to realize automatic stroke reversing control with a reversing response time of <5ms.

[0030] In another embodiment, the lever mounting base 34 can be configured to connect to the slide table 32 via a T-slot, forming an adjustable angle of 5°-15° with the handle fixing mechanism 5. The handle fixing mechanism 5 is fixed to the surface of the housing 1 and is used to clamp the handle 6 to be tested.

[0031] Optionally, in some embodiments, the surface of the slide 32 is subjected to plasma nitriding to form a hardened layer with a hardness ≥65HRC, and coated with a 0.2μm thick graphene lubricating coating, with the wear control index being <0.05mm after 3 million tests.

[0032] According to the technical solution of this utility model, a stepper motor is used instead of a traditional servo motor, and a closed-loop control is formed by combining dual photoelectric switches, which significantly reduces hardware costs. At the same time, the photoelectric switches achieve stroke limit through non-contact sensing, avoiding the accuracy reduction problem caused by collision and wear of mechanical limit, and reducing maintenance costs.

[0033] Optionally, in some embodiments, a power switch 7 and an operation panel 8 electrically connected to the test bench 2 are provided on the surface of the housing 1 for controlling the start and stop of the drive mechanism 3 and setting test parameters.

[0034] Optionally, in some embodiments, the operation panel 8 is provided with a speed adjustment knob 9, which is signal-connected to the drive motor 31. In one embodiment, the speed adjustment knob 9 can be a digital speed adjustment knob with a built-in Hall encoder, and the speed adjustment range of the speed adjustment knob is 0.5-10Hz. The test device control system uses an STM32 as the main control chip, and the main control chip has a built-in algorithm to realize the speed-number conversion. The conversion formula is: number of tests = motor speed (Hz) × 2000 pulses / revolution × test time (s).

[0035] Optionally, in some embodiments, an emergency stop button 10 is also provided on the housing 1. The emergency stop button 10 is connected in series with the 220VAC main circuit and triggers shutdown protection when a button malfunction or structural breakage is detected.

[0036] The testing device according to this utility model is equipped with an emergency stop button, which can directly cut off the power supply to the drive motor in an emergency to prevent equipment damage or personal injury caused by test abnormalities, and meets industrial safety standards.

[0037] The speed adjustment knob on the control panel allows for precise control of the drive motor speed, simulating the handle's operating frequency under different usage scenarios and adapting to diverse testing needs. For example, low-speed testing can be used to evaluate the handle's long-term fatigue performance, while high-speed testing verifies its ultimate durability.

[0038] Optionally, in some embodiments, an outer cover 12 is provided outside the test stage 2 on the housing 1, and the outer cover 12 is made of acrylic material. The test stage outer cover is made of acrylic material, which has both high light transmittance and impact resistance, making it easy to observe the testing process and protect the internal mechanism. The acrylic outer cover can also be customized with openings or sensor integration as needed to support future functional expansion.

[0039] Alternatively, according to some embodiments, the testing apparatus operates as described below:

[0040] After startup, the slide table 32 drives the lever 35 to move in a straight line to push the handle 6. When the slide table 32 moves to the end of its stroke and triggers the first photoelectric switch 41, the stepper motor 31 reverses and drives the lever 35 to move in the opposite direction. When the slide table 32 moves to the other end and triggers the second photoelectric switch 42, the stepper motor 31 reverses again, forming a cyclical reciprocating motion.

[0041] Specifically, in one embodiment, the testing apparatus operates as follows:

[0042] (1) Set the test speed to 2Hz, stroke to 250mm, and target number of cycles to 500,000 via the operation panel 8;

[0043] (2) The slide 32 accelerates at 300 mm / s 2 Accelerate to the set speed, and when the photoelectric switch is triggered, drive motor 31 receives a reverse signal;

[0044] (3) Record the button pressure decay curve and structural deformation of the handle in real time at a sampling frequency of 1kHz;

[0045] (5) Generate a test report containing a speed-wear relationship matrix and failure threshold values. The data storage format is CSV / TXT dual mode.

[0046] All parts not described in this utility model are the same as or can be implemented using existing technology. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic handle lifespan testing device, comprising a housing and a testing platform, wherein the testing platform is mounted on the upper part of the housing, characterized in that, The test bench is equipped with a drive mechanism, a limit mechanism, and a handle fixing mechanism, wherein: The drive mechanism includes a drive motor, a linear slide, a lead screw, a lever mounting base, and a lever. The lever mounting base is fixed to the lead screw of the slide. The lever is arranged on the lever mounting base perpendicular to the movement direction of the slide. The drive motor is used to control the lead screw to drive the lever to reciprocate, for periodically pushing the handle grip. The limiting mechanism includes a set of photoelectric switches, symmetrically installed at both ends of the slide table's travel, used to trigger the drive motor to reverse. The handle fixing mechanism is fixed to the surface of the housing and is used to clamp the handle to be tested.

2. The testing apparatus according to claim 1, characterized in that, The drive motor is a stepper motor.

3. The testing apparatus according to claim 2, characterized in that, A power switch and an operation panel electrically connected to the test bench are provided on the surface of the housing for controlling the start and stop of the drive mechanism and setting test parameters.

4. The testing apparatus according to claim 3, characterized in that, The operation panel is equipped with a speed adjustment knob, which is connected to the drive motor for adjusting the speed of the drive motor.

5. The testing apparatus according to claim 1, characterized in that, An emergency stop button is also provided on the housing. The emergency stop button is electrically connected to the drive motor and is used to cut off the power supply to the drive motor in an emergency.

6. The testing apparatus according to claim 1, characterized in that, The lever and the lever mounting base are connected by a thread, and the end of the lever is provided with a buffer rubber pad.

7. The testing apparatus according to claim 4, characterized in that, The speed adjustment knob has a rotational speed adjustment range of 0.5-10Hz.

8. The testing apparatus according to claim 1, characterized in that, An outer cover is provided on the outside of the test platform on the housing, and the outer cover is made of acrylic material.

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