A dynamic detection device for back lash of a speed reducer

Abstract

The utility model discloses a kind of dynamic detection equipment of return gap of speed reducer, it is related to the technical field of speed reducer detection equipment, the utility model aims at solving the problem of traditional detection mode cumbersome operation, the utility model includes rack and product to be measured, the product to be measured is installed on rack, the rack is set to the bracket structure with two layers of platform in the middle of aluminium profile building, input end servo motor is installed below the lower layer platform of the rack. Compared with traditional detection mode, the real-time return gap value of speed reducer in the movement process can be detected in the present scheme, so that the return gap of speed reducer at each different position is completely detected, the complete return gap condition of speed reducer can be objectively reflected, the present scheme maximizes the simplification of operation difficulty.

Description

Technical Field

[0001] This utility model relates to the technical field of speed reducer testing equipment, specifically a speed reducer backlash dynamic testing equipment. Background Technology

[0002] Backlash refers to the relative displacement between the input and output of a speed reducer due to gear clearance. Excessive backlash can lead to poor gear meshing, resulting in inaccurate transmission, increased vibration and wear, and in severe cases, equipment failure. Therefore, detecting the backlash of a speed reducer is particularly important. The traditional testing method involves fixing the input shaft of the speed reducer, applying 2% of its rated output torque to the output shaft, and measuring the deformation using a dial indicator.

[0003] Traditional backlash detection methods can only measure the backlash value at one point at a time. Measuring the backlash value at different points requires releasing the input end of the reducer, rotating the reducer by a certain angle, and then locking it again, which is cumbersome and inefficient. Moreover, the result obtained is only the backlash value when the reducer is stationary at a certain fixed position, and cannot obtain the complete dynamic backlash value of the reducer.

[0004] Current methods for detecting backlash can only be used when the reducer is stationary, and each test can only measure the backlash value at a few points, making it impossible to fully detect the backlash of the reducer and assess its actual performance during operation. Furthermore, current methods require manual measurement, resulting in low efficiency, and operators need considerable professional experience to ensure accurate results. The results are also susceptible to subjective factors by the operator (such as inaccurate loading force or incorrect dial indicator readings). Utility Model Content

[0005] To address the aforementioned problems, specifically those raised in the background section, this invention proposes a dynamic detection device for the return backlash of a speed reducer. The device includes a frame and a product under test. The product is mounted on the frame, which is a support structure constructed of aluminum profiles with two intermediate platforms. An input servo motor is installed below the lower platform of the frame, and a detection platform is installed above the upper platform. The product under test is mounted above the detection platform. An input torque sensor is positioned between the two platforms of the frame, with its bottom end connected to the output shaft of the input servo motor via a coupling. An output servo motor is located at the top of the frame, and an output speed reducer is mounted at its bottom. An output torque sensor is mounted at the bottom of the output speed reducer. Both ends of the product under test are connected to the output torque sensor and the input torque sensor respectively via output shaft clamping sleeves. An output rotary encoder is installed at the connection between the output torque sensor and the output shaft clamping sleeve, and an input rotary encoder is installed at the connection between the input torque sensor and the output shaft clamping sleeve.

[0006] The top of the frame is equipped with a lifting platform, which is vertically mounted on the frame via a lifting mechanism. The output torque sensor is mounted on the lifting platform.

[0007] A further feature of this invention is that the lifting mechanism includes a slider and at least two guide rails, the guide rails are vertically mounted on the inner wall of the frame, the slider is slidably mounted on the guide rails, and the slider is fixedly connected to the lifting platform.

[0008] A further feature of this invention is that the lifting mechanism includes a lead screw lifting servo motor and a ball screw, the output shaft of the lead screw lifting servo motor is connected to the input shaft above the ball screw, the ball screw is installed at the top of the frame, and the telescopic end of the ball screw is connected to the lifting platform.

[0009] The beneficial technical effects of this utility model are as follows: Compared with traditional detection methods, this solution can detect the real-time backlash value of the reducer during the movement process, thereby completely detecting the backlash of the reducer at different positions, and objectively reflecting the complete backlash situation of the reducer. This solution greatly simplifies the operation difficulty, the recording process does not require manual intervention, eliminates the influence of human factors on the detection results, and makes the measurement results more accurate and objective. It does not require operators to have rich experience, reducing personnel training costs. Attached Figure Description

[0010] Figure 1 A schematic diagram of the overall structure of this solution is shown.

[0011] Reference numerals in the attached diagram: 1. Input servo motor; 2. Input torque sensor; 3. Input rotary encoder; 4. Testing platform; 5. Product under test; 6. Output shaft clamping sleeve; 7. Output rotary encoder; 8. Output torque sensor; 9. Output reducer; 10. Output servo motor; 11. Lead screw lifting servo motor; 12. Ball screw; 13. Slider; 14. Guide rail; 15. Lifting platform. Detailed Implementation

[0012] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0013] This utility model proposes a dynamic detection device for the return backlash of a speed reducer. The frame is constructed entirely of aluminum profiles. Two-layer support structures are built in the middle of the frame as the equipment installation platform. A detection platform 4 is installed above the upper platform, and the product to be tested 5 is installed above the detection platform 4. An input servo motor 1 is installed below the lower platform. An input torque sensor 2 is set between the two platforms. The input torque sensor 2 is connected to the output shaft of the input servo motor 1 through a coupling. The input torque sensor 2 is connected to the product to be tested 5 above it through an input rotary encoder 3 and an output shaft clamping sleeve 6. An output torque sensor 8, an output speed reducer 9, and an output servo motor 10 are installed on the top of the frame through a vertically lifting platform 15. The output torque sensor 8, the output speed reducer 9, and the output servo motor 10 are connected in sequence. An output rotary encoder 7 and an output shaft clamping sleeve 6 are installed on the input end of the output torque sensor 8.

[0014] During testing, the product to be tested 5 is installed on the testing platform 4, with the lower input end extending out of the testing platform 4 and connecting to the lower output shaft clamping sleeve 6. The lifting platform 15 is then slid down so that the upper output shaft clamping sleeve 6 connects to the output end of the product to be tested 5. Then, the "Start Testing" button on the control device is clicked to automatically test the return gap. After the test is completed, the lifting platform 15 is lifted to remove the product to be tested 5.

[0015] The lifting platform 15 is mounted on the frame via a vertically lifting mechanism. The lifting mechanism consists of at least two guide rails 14 and a slider 13. The guide rails 14 are vertically mounted on the frame, and the slider 13 is slidably mounted on the guide rails 14. The lifting platform 15 is then connected and fixed to the slider 13.

[0016] A ball screw 12 is installed on the top of the frame, and a screw lifting servo motor 11 is installed on the input end of the ball screw 12. The extension end of the ball screw 12 is connected to the lifting platform 15, so that the extension end of the ball screw 12 can be controlled by the screw lifting servo motor 11 to drive the stroke of the lifting platform 15.

[0017] Detection Principle: The input and output servo motors 1 and 10 simultaneously load the input and output shafts of the product under test 5, causing the reducer to rotate at a constant speed. Torque sensors at both ends provide feedback on the torque output by the motors, while rotary encoders at both ends record the real-time positions of the input and output shafts of the product under test 5. After the reducer rotates a certain angle, the two servo motors are controlled to apply reverse loading, causing the reducer to rotate in the opposite direction. The backlash value is calculated based on the real-time position of the reducer recorded by the two rotary encoders. Compared to traditional detection methods, this solution can detect the real-time backlash value of the reducer during operation, thus completely detecting the backlash at various positions. The results of this equipment objectively reflect the complete backlash situation of the reducer. Traditional methods only detect the backlash value at a few points when the reducer is stationary; this solution only requires the operator to connect and lock the input and output ends of the reducer to the equipment, and then click the "Start Detection" button. Throughout the entire testing process, the loading force, speed, and number of rotations at both ends are controlled and dynamically adjusted by servo motors and torque sensors to ensure torque input stability. The position values ​​of the input and output shafts are recorded by a rotary encoder, eliminating the need for manual intervention and removing the influence of human factors on the test results, making the measurement results more accurate and objective. Compared with traditional testing methods, using this equipment to test the return clearance of the reducer does not require operators to have extensive experience, reducing personnel training costs.

[0018] Although the present invention has been described with reference to preferred embodiments, various modifications can be made to it and components can be replaced with equivalents without departing from the scope of the present invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0019] In the description of this utility model, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to those processes, articles, or apparatus / devices.

[0022] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A dynamic detection device for the return clearance of a speed reducer, comprising a frame and a product to be tested (5), wherein the product to be tested (5) is mounted on the frame, characterized in that: The frame is constructed of aluminum profiles with a support structure having two platforms in the middle. An input servo motor (1) is installed below the lower platform of the frame, and a detection platform (4) is installed above the upper platform of the frame. The product to be tested (5) is installed above the detection platform (4). An input torque sensor (2) is installed between the two platforms of the frame. The bottom end of the input torque sensor (2) is connected to the output shaft of the input servo motor (1) via a coupling. An output servo motor (10) is installed at the top of the frame. An output end reducer (9) is installed at the bottom end of the output end servo motor (10). An output end torque sensor (8) is installed at the bottom end of the output end reducer (9). The two ends of the product under test (5) are connected to the output end torque sensor (8) and the input end torque sensor (2) respectively through the output shaft clamping sleeve (6). An output end rotary encoder (7) is installed at the connection between the output end torque sensor (8) and the output shaft clamping sleeve (6). An input end rotary encoder (3) is installed at the connection between the input end torque sensor (2) and the output shaft clamping sleeve (6). The top of the frame is provided with a lifting platform (15), and the lifting platform (15) is installed on the frame vertically by means of a lifting mechanism. The output torque sensor (8) is installed on the lifting platform (15).

2. The dynamic detection device for the return clearance of a speed reducer according to claim 1, characterized in that: The lifting mechanism includes a slider (13) and at least two guide rails (14). The guide rails (14) are vertically mounted on the inner wall of the frame. The slider (13) is slidably mounted on the guide rails (14). The slider (13) is fixedly connected to the lifting platform (15).

3. The dynamic detection device for the return clearance of a speed reducer according to claim 2, characterized in that: The lifting mechanism also includes a screw lifting servo motor (11) and a ball screw (12). The output shaft of the screw lifting servo motor (11) is connected to the input shaft above the ball screw (12). The ball screw (12) is installed at the top of the frame. The telescopic end of the ball screw (12) is connected to the lifting platform (15).

Images