A wire drive life detection device

Abstract

This utility model belongs to the field of transmission wire testing technology, specifically relating to a device for testing the lifespan of a transmission wire. This utility model provides a device for testing the lifespan of a transmission wire, aiming to solve the problem of difficult operation in existing technologies for testing the lifespan of transmission wires. A device for testing the lifespan of a transmission wire includes a frame, on which a fixed wheel and a moving wheel are mounted. The fixed wheel is rotatably connected to the frame, and a first motor driving the fixed wheel to rotate is also mounted on the frame. The moving wheel is slidably connected to the frame via a slide block, and is rotatably connected to the slide block. A drive assembly driving the slide block is mounted on the frame. This utility model, through the cooperation of the moving wheel and the slide block, can precisely adjust the tension on the transmission wire under test, thereby simulating different tension conditions that the transmission wire may encounter in actual applications. The first motor drives the fixed wheel to rotate, realizing the forward and reverse rotation of the transmission wire, which can conveniently test the lifespan of the transmission wire.

Description

Technical Field

[0001] This utility model belongs to the field of transmission wire testing technology, specifically relating to a wire transmission life testing device. Background Technology

[0002] Some medical devices use transmission wires for power transmission. The transmission wires are usually wound between multiple fixed or movable pulleys. By applying force to one end of the transmission wire, the moving parts at the other end of the transmission wire are driven.

[0003] The service life of the transmission wire needs to be tested to prevent sudden breakage or failure. The testing process typically involves applying a certain force to the transmission wire, then rotating it in both directions a certain number of times (e.g., 3000 times). The change in tension before and after this process completes the test. Failure modes of the transmission wire include breakage and tensile slack.

[0004] There is no device specifically designed for detecting the lifespan of transmission wires in the current technology, which makes the operation of detecting the lifespan of transmission wires difficult. Utility Model Content

[0005] This invention provides a wire transmission life detection device, which aims to solve the problem of difficult operation in the prior art for detecting the life of transmission wires.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] A wire drive life testing device includes a frame, on which a fixed wheel and a moving wheel are arranged;

[0008] The fixed wheel is rotatably connected to the frame, and the frame is also provided with a first motor that drives the fixed wheel to rotate. The moving wheel is slidably connected to the frame through a slide block, and the moving wheel is rotatably connected to the slide block. The frame is provided with a drive assembly that drives the slide block to move closer to or away from the fixed wheel.

[0009] The transmission wire to be tested is respectively sleeved on the fixed wheel and the moving wheel. The driving assembly adjusts the tension of the transmission wire to be tested through the moving wheel. The first motor drives the transmission wire to be tested to rotate forward and backward through the fixed wheel. A tension detector is provided on the transmission wire to be tested to detect the tension of the transmission wire to be tested.

[0010] A further improved solution: The drive assembly includes a guide rail, the slide is slidably connected to the guide rail, the drive assembly also includes a lead screw rotatably connected to the frame, and the slide is provided with a screw hole that mates with the lead screw.

[0011] Based on the above technical solution: the lead screw drive features high precision and high rigidity, ensuring that the slide moves precisely and minutely on the guide rail. This is crucial for simulating the working state of the lead screw drive under varying minute tension changes. High-precision movement helps to more accurately assess the lifespan of the lead screw drive and improves the reliability of the test results. The guide rail provides a stable movement path for the slide, reducing the impact of wobbling or offset during movement on the test results. The stable movement path helps maintain a constant relative position between the moving and fixed wheels, thus ensuring the consistency of the test conditions. The linear movement of the slide is achieved through the cooperation of the lead screw and the screw hole, eliminating the need for complex transmission mechanisms or additional drive components. The simplified drive structure reduces the complexity and cost of the device while improving the reliability and maintainability of the system.

[0012] A further improvement: The frame is also equipped with a second motor that drives the lead screw, and the second motor drives the lead screw through a coupling.

[0013] Based on the above technical solution: the second motor provides a direct and stable driving force to the lead screw, ensuring its continuous and smooth rotation. This facilitates smoother and more precise movement of the slide on the guide rail, thereby improving the stability and reliability of the entire testing device. Through the cooperation of the second motor and the coupling, precise control of the lead screw rotation can be achieved, leading to precise adjustment of the slide's movement speed and position. This makes it easier to automate the testing device, reducing reliance on manual operation and improving testing efficiency and accuracy. The second motor directly drives the lead screw through the coupling, avoiding complex transmission mechanisms such as gears and belts, thus simplifying the overall structure of the device. The simplified transmission structure reduces the complexity and cost of the device while improving system reliability and maintainability.

[0014] A further improved solution: The second motor is fixed to the frame by bolts.

[0015] Based on the above technical solution: Bolted connections are a robust and reliable connection method capable of withstanding significant tensile and shear forces. Fixing the second motor to the frame with bolts ensures the motor remains stable during operation, preventing displacement due to vibration or load changes. This stable structure helps reduce the impact of motor movement or vibration on the overall performance of the testing device, improving the accuracy and reliability of the test results. Bolted connections are also easy to install and remove. When maintenance or replacement of the second motor is required, simply loosening the bolts allows for easy removal of the motor from the frame without damaging other structures or components. This helps reduce maintenance costs and time, improving the availability and flexibility of the testing device.

[0016] A further improved solution: There are two guide rails, which are located on both sides of the lead screw.

[0017] Based on the above technical solution: two guide rails are located on both sides of the lead screw, significantly enhancing the overall rigidity of the testing device. This design helps reduce deformation caused by load changes or vibration, ensuring the stability and accuracy of the slide during movement. The parallel arrangement of the two guide rails provides a precise guiding path for the slide. The sliding of the slide on the two guide rails can mutually constrain each other, reducing lateral offset and thus improving guiding accuracy and smooth movement. When the slide is under load, the two guide rails can share the load, preventing a single guide rail from bearing excessive pressure and causing damage or deformation. This load-balanced design helps improve the load-bearing capacity and service life of the testing device. The combined design of the two guide rails and the lead screw enhances the stability and reliability of the testing device under high-speed, high-load conditions. This design allows the testing device to more accurately simulate the working state of the wire drive under different operating conditions, thereby improving the accuracy and reliability of life testing.

[0018] A further improved solution: the cross-sectional shape of the guide rail is a trapezoid that is wider at the top and narrower at the bottom.

[0019] Based on the above technical solution: the trapezoidal cross-sectional shape of the guide rail results in a larger upper width, providing a larger support area and thus enhancing the stability of the slide during movement. The narrower lower design helps reduce the friction area between the guide rail and the slide, lowering frictional resistance and making the slide move more smoothly. The trapezoidal cross-sectional shape can more effectively distribute the pressure and friction generated during slide movement, reducing guide rail wear. Simultaneously, because the trapezoidal cross-sectional shape is relatively regular, it is easy to process and manufacture, ensuring the precision and smoothness of the guide rail surface, further improving wear resistance.

[0020] A further improved solution: The frame is also provided with a mounting plate for mounting the fixed wheel. The mounting plate is fixed to the frame by bolts, and the height of the fixed wheel is flush with the height of the moving wheel.

[0021] Based on the above technical solution: the mounting plate is fixed to the frame with bolts. This connection method offers high precision and reliability, ensuring the accurate positioning of the fixed wheel during installation. The mounting plate provides a stable support platform for the fixed wheel, reducing displacement caused by vibration or load changes. This stability helps maintain a constant relative position between the fixed and moving wheels, thus ensuring consistent testing conditions. The bolted connection of the mounting plate to the frame facilitates the removal and replacement of the fixed wheel. When the fixed wheel becomes worn or malfunctions, maintenance personnel can easily loosen the bolts, remove the fixed wheel from the mounting plate, and replace or repair it.

[0022] A further improved solution: The first motor is fixed to the mounting plate by bolts, and the fixed wheel is installed on the output shaft of the first motor by key connection.

[0023] Based on the above technical solution: The first motor is securely fixed to the mounting plate with bolts. This connection method can withstand large tensile and shear forces, ensuring the motor remains stable during operation. The fixed wheel is mounted on the motor's output shaft via a key connection. This connection method offers high precision and reliability, ensuring the stability and coaxiality of the fixed wheel during rotation. The key connection is a precise transmission method that ensures synchronous rotation between the fixed wheel and the motor's output shaft, reducing errors caused by asynchrony. High-precision transmission helps improve the accuracy and reliability of the detection device's assessment of wire drive life.

[0024] A further improved solution: The slide is provided with a support plate to support the moving wheel. The support plate and the slide are an integral structure, and the moving wheel is rotatably connected to the support plate.

[0025] Based on the above technical solution: the support plate and the slide are an integral structure, meaning they are connected together by integral processing or welding, without any additional connecting parts or interfaces. This design significantly enhances the rigidity of the structure, making the slide more stable when bearing the moving wheel and its load, and reducing deformation caused by vibration or load changes.

[0026] A further improved solution: A support shaft is provided on the support plate, the driving wheel is rotatably connected to the support shaft, and a rolling bearing is provided between the driving wheel and the support shaft.

[0027] Based on the above technical solutions, the design of rolling bearings can significantly reduce the friction between the moving wheel and the support shaft during rotation. Compared to sliding friction, rolling friction has less resistance, thus extending the service life of both the moving wheel and the support shaft and reducing the risk of failure due to wear. Rolling bearings can transmit torque and power more effectively, reducing energy loss. This makes the moving wheel rotate more smoothly and efficiently, improving the transmission efficiency of the entire testing device.

[0028] The beneficial effects of this utility model are as follows:

[0029] This invention, through the cooperation of a moving wheel and a sliding block, allows for precise adjustment of the tension on the transmission wire under test, thereby simulating different tension conditions that the transmission wire may encounter in practical applications. A first motor drives a fixed wheel to rotate, realizing the forward and reverse rotation of the transmission wire, further simulating the dynamic changes of the transmission wire during operation. By setting up a tension detector, the change in tension of the transmission wire before and after testing can be directly monitored, which is a key indicator for evaluating the lifespan of the transmission wire. The invention can automatically complete the forward and reverse rotation of the transmission wire and record necessary test data, facilitating the testing of the transmission wire's lifespan and significantly improving testing efficiency.

[0030] The use of a primary motor and a tension detector ensures the accuracy of the test results. Multiple forward and reverse rotation tests allow for a more comprehensive evaluation of the transmission wire's lifespan under various operating conditions. It is not only suitable for specific types of transmission wires but can also be adapted to test transmission wires of different specifications and materials by adjusting parameters. The design of the slide and drive wheel allows the device to easily handle transmission wires of different sizes, improving its versatility and flexibility. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For users of ordinary skills in the art, other related drawings can be obtained from these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the wire transmission life testing device of this utility model after the transmission wire to be tested is installed.

[0033] Figure 2 This is a schematic diagram of the tension detector in a wire drive life testing device of this utility model.

[0034] Figure 3 This is a schematic diagram showing the installation position of the tension detector on the transmission wire to be tested in a wire transmission life testing device of this utility model.

[0035] Explanation of the labels in the diagram:

[0036] 1-Frame; 2-Fixed wheel; 3-Moving wheel; 4-First motor; 5-Slide; 6-Transmission wire to be tested; 7-Tension detector; 8-Guide rail; 9-Lead screw; 10-Second motor; 11-Mounting plate; 12-Support plate; 13-Support shaft. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model. All other embodiments obtained by users of the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0038] refer to Figures 1 to 3 A wire drive life detection device includes a frame 1, on which a fixed wheel 2 and a moving wheel 3 are provided;

[0039] The fixed wheel 2 is rotatably connected to the frame 1. The frame 1 is also provided with a first motor 4 that drives the fixed wheel 2 to rotate. The moving wheel 3 is slidably connected to the frame 1 through a slide block 5. The moving wheel 3 is rotatably connected to the slide block 5. The frame 1 is provided with a drive assembly that drives the slide block 5 to move closer to or away from the fixed wheel 2.

[0040] The transmission wire 6 to be tested is respectively sleeved on the fixed wheel 2 and the moving wheel 3. The driving component adjusts the tension of the transmission wire 6 to be tested through the moving wheel 3. The first motor 4 drives the transmission wire 6 to be tested to rotate forward and backward through the fixed wheel 2. A tension detector 7 is provided on the transmission wire 6 to detect the tension of the transmission wire 6 to be tested.

[0041] Specifically: the drive assembly includes a guide rail 8, the slide 5 is slidably connected to the guide rail 8, and the drive assembly also includes a lead screw 9 rotatably connected to the frame 1. The slide 5 is provided with a threaded hole that mates with the lead screw 9. Furthermore, the frame 1 is also equipped with a second motor 10 that drives the lead screw 9. The second motor 10 drives the lead screw 9 through a coupling. The coupling can be a rigid coupling, such as a flange coupling.

[0042] The second motor 10 is fixed to the frame 1 by bolts. Alternatively, the second motor 10 can be fixed to the frame 1 by screws. A controller is also installed on the frame 1, and the second motor 10 can be controlled by the controller. There are two guide rails 8, located on either side of the lead screw 9. The cross-sectional shape of the guide rail 8 is a trapezoid, wider at the top and narrower at the bottom. The cross-sectional shape of the guide rail 8 can also be other shapes. For example, the cross-sectional shape of the guide rail 8 can also be polygonal to improve its bending strength.

[0043] Specifically: The frame 1 is also equipped with a mounting plate 11 for mounting the fixed wheel 2. The mounting plate 11 is fixed to the frame 1 by bolts, and the height of the fixed wheel 2 is flush with the height of the moving wheel 3. The first motor 4 is fixed to the mounting plate 11 by bolts, and the fixed wheel 2 is keyed to the output shaft of the first motor 4. The mounting plate 11 can also be an integral structure with the frame 1, and the first motor 4 can also be controlled by a controller. The controller can also establish wireless communication with the tension detector 7.

[0044] The slide block 5 is provided with a support plate 12 for supporting the moving wheel 3. The support plate 12 and the slide block 5 are integrally formed, and the moving wheel 3 is rotatably connected to the support plate 12. The support plate 12 is provided with a support shaft 13, and the moving wheel 3 is rotatably connected to the support shaft 13. A rolling bearing is provided between the moving wheel 3 and the support shaft 13. The support shaft 13 can be integrally formed with the support plate 12, or the support shaft 13 can be welded to the support plate 12.

[0045] The working principle of this embodiment:

[0046] Failure modes of transmission wires include breakage and tensile relaxation. This method is mainly used to detect the tensile relaxation failure mode of transmission wires. It can also detect the breakage failure mode. The transmission wire 6 to be tested is respectively fitted onto the fixed wheel 2 and the moving wheel 3, ensuring a tight fit between the transmission wire and both wheels without loosening or slippage. The position of the slide 5 is adjusted, and the drive assembly maintains appropriate tension in the transmission wire between the moving wheel 3 and the fixed wheel 2. In this step, an initial tension value can be preset according to actual needs. The drive assembly pushes or pulls the moving wheel 3 towards or away from the fixed wheel 2 to achieve the required tension.

[0047] Start the first motor 4, which drives the transmission wire to rotate in both directions via the fixed wheel 2. According to the testing requirements, the transmission wire can be set to rotate in both directions by 180 degrees or 360 degrees, and the total number of rotations can be set (e.g., 3000 times).

[0048] After the test is completed, the tension data recorded by the tension detector 7 before and after the transmission wire rotates are collected and organized. By analyzing the changes in the tension of the transmission wire, the fatigue level and service life of the transmission wire can be assessed.

[0049] This utility model is not limited to the above-mentioned optional embodiments. Under the premise of non-contradiction, the various solutions can be combined arbitrarily. Anyone can derive other forms of products under the guidance of this utility model. However, no matter what changes are made in their shape or structure, all technical solutions that fall within the scope of the claims of this utility model are within the protection scope of this utility model.

Claims

1. A wire drive life testing device, characterized in that: Includes a frame, on which fixed wheels and moving wheels are provided; The fixed wheel is rotatably connected to the frame, and the frame is also provided with a first motor that drives the fixed wheel to rotate. The moving wheel is slidably connected to the frame through a slide block, and the moving wheel is rotatably connected to the slide block. The frame is provided with a drive assembly that drives the slide block to move closer to or away from the fixed wheel. The transmission wire to be tested is respectively sleeved on the fixed wheel and the moving wheel. The driving assembly adjusts the tension of the transmission wire to be tested through the moving wheel. The first motor drives the transmission wire to be tested to rotate forward and backward through the fixed wheel. A tension detector is provided on the transmission wire to be tested to detect the tension of the transmission wire to be tested.

2. The wire drive life testing device according to claim 1, characterized in that: The drive assembly includes a guide rail, the slide is slidably connected to the guide rail, and the drive assembly also includes a lead screw rotatably connected to the frame, the slide having a screw hole that mates with the lead screw.

3. The wire drive life testing device according to claim 2, characterized in that: The frame is also equipped with a second motor that drives the lead screw, and the second motor drives the lead screw through a coupling.

4. The wire drive life detection device according to claim 3, characterized in that: The second motor is fixed to the frame by bolts.

5. The wire drive life detection device according to claim 4, characterized in that: There are two guide rails, which are located on both sides of the lead screw.

6. A wire drive life testing device according to any one of claims 2 to 5, characterized in that: The cross-sectional shape of the guide rail is a trapezoid, wider at the top and narrower at the bottom.

7. The wire drive life testing device according to claim 1, characterized in that: The frame is also provided with a mounting plate for mounting the fixed wheel. The mounting plate is fixed to the frame with bolts, and the height of the fixed wheel is flush with the height of the moving wheel.

8. The wire drive life detection device according to claim 7, characterized in that: The first motor is fixed to the mounting plate by bolts, and the fixed wheel is installed on the output shaft of the first motor by key connection.

9. The wire drive life detection device according to claim 8, characterized in that: The slide is provided with a support plate that supports the moving wheel. The support plate and the slide are an integral structure, and the moving wheel is rotatably connected to the support plate.

10. A wire drive life testing device according to claim 9, characterized in that: A support shaft is provided on the support plate, and the driving wheel is rotatably connected to the support shaft. A rolling bearing is provided between the driving wheel and the support shaft.

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