Hollow shaft harmonic drive chain testing fixture

Abstract

The utility model provides a hollow shaft harmonic drive chain test frock relates to drive chain test frock technical field, include: test subassembly, it includes detection platform, input motor and drive chain collector, drive chain connecting flange, it sets up in detection platform, be used for installing hollow shaft harmonic reducer, and centering mechanism, it sets up in drive chain connecting flank, centering mechanism includes at least three centering clamp block, with the same number of slider of centering clamp block, gear ring and drive a the sliding screw rod of slider. The utility model has the advantages of: through the cooperation of centering mechanism design including at least three centering clamp block, slider, gear ring and screw rod, can realize the quick, accurate centering operation of hollow shaft harmonic reducer, make the mouth diameter for loading hollow shaft harmonic reducer can be adjusted, improve the applicability of frock, the setting of expansion shaft enhances the installation stability of reducer, prevents the loosening or deviation in the test process.

Description

Technical Field

[0001] This utility model relates to the field of transmission chain testing fixtures, and in particular to a hollow shaft harmonic transmission chain testing fixture. Background Technology

[0002] With the development of modern industry, the performance requirements for transmission systems are becoming increasingly stringent. Hollow shaft harmonic drive chains, with their unique advantages such as high transmission ratio, high precision, small size, and light weight, have been widely used in aerospace, robotics, precision instruments, and other fields.

[0003] Currently, there are some shortcomings in the testing fixtures for hollow shaft harmonic drive chains. Existing testing fixtures are often complex in structure, expensive, and difficult to achieve universal testing of hollow shaft harmonic drive chains of different specifications. For example, harmonic reducers of different specifications of hollow shaft harmonic drive chains have different diameters. When connecting them through flanges, the flange stop of the fixture needs to be designed separately. Therefore, the testing fixture has certain limitations. Thus, developing a hollow shaft harmonic drive chain testing fixture that is simple in structure, low in cost, highly versatile, and can accurately collect and process test data is of great practical significance. Utility Model Content

[0004] In view of this, the present invention provides a hollow shaft harmonic drive chain testing fixture to solve the technical problem of poor versatility of existing testing fixtures for installing harmonic reducers.

[0005] An embodiment of this utility model provides a hollow shaft harmonic drive chain testing fixture, comprising:

[0006] The test components include a test bench, an input motor, and a transmission chain acquisition unit.

[0007] A transmission chain connecting flange is provided on the testing platform for installing a hollow shaft harmonic reducer;

[0008] A centering mechanism is provided on the transmission chain connecting flange. The centering mechanism includes at least three centering clamps, a number of sliders equal to the number of centering clamps, a gear ring, and a threaded rod for driving one of the sliders to slide. Each centering clamp is housed within the transmission chain connecting flange. One centering clamp is slidably connected to one slider. The sliding angle between the centering clamp and the slider is 45 degrees. The gear ring simultaneously engages with multiple sliders. The threaded rod passes through and is threadedly connected to one slider. By rotating the threaded rod and engaging with the slider, the slider slides within the transmission chain connecting flange. Through the engagement of the slider and the gear ring, multiple sliders engaged with the gear ring slide synchronously, causing the positions of the multiple centering clamps slidably connected to the sliders to move synchronously, thus clamping and centering the hollow shaft harmonic reducer.

[0009] Furthermore, a stop is provided on one side of the transmission chain connecting flange, and the centering clamp is L-shaped and extends into the stop, so that the hollow shaft harmonic reducer can be inserted and clamped by the centering clamp.

[0010] Furthermore, the inner wall of the stop is provided with a T-shaped longitudinal groove, and the bottom surface of the centering clamp is provided with extension strips facing both sides, the extension strips being attached to both ends of the groove.

[0011] Furthermore, the bottom surface of the centering clamp is provided with multiple slide bars, and the upper surface of the slider is provided with a slide groove. The multiple slide bars are slidably connected to the slide groove, and both the slide bars and the slide groove are inclined at a 45-degree angle to the horizontal or vertical plane.

[0012] Furthermore, the transmission chain connecting flange has a mounting groove on the side away from the stop, and a plurality of guide rods are provided on the inner wall of the mounting groove, and the slider is slidably connected to the guide rods.

[0013] Furthermore, the gear ring and the transmission chain connecting flange are coaxially arranged, each of the sliders has a toothed portion, and each of the toothed portions meshes with the gear ring.

[0014] Furthermore, it also includes an expansion shaft, which includes a sleeve, an expansion tube, and an expansion core. The sleeve is fitted outside the output end of the input motor and is locked in place by screws. The expansion tube passes through the hollow shaft harmonic reducer, so that the hollow shaft harmonic reducer is centered and driven.

[0015] Furthermore, the surface of the testing platform is continuously provided with multiple positioning slots to facilitate the setting of the input motor and the transmission chain collector. The testing platform is also provided with a test base, and the transmission chain connecting flange is connected to the test base flange.

[0016] Furthermore, the transmission chain collector is connected to a transmission chain output shaft, which is connected to the output end of the hollow shaft harmonic reducer.

[0017] Furthermore, a motor mount is fixed to the testing platform with screws, and the input motor is connected to the motor mount.

[0018] The beneficial effects of the technical solution provided by the embodiments of this utility model are as follows: The hollow shaft harmonic drive chain testing fixture of this utility model, through the centering mechanism design including at least three centering clamps, a slider, a gear ring, and a threaded rod, can achieve rapid and precise centering operation on the hollow shaft harmonic reducer. This allows for adjustment of the stop diameter used to load the hollow shaft harmonic reducer, improving the applicability of the fixture. The expansion shaft design enhances the installation stability of the reducer, preventing loosening or displacement during the test and ensuring the stability of the test data. In addition, the positioning groove and motor base design of the testing platform provide a stable and reliable installation foundation for components such as the input motor and drive chain acquisition device, facilitating the adjustment of position and angle to meet different testing requirements. Overall, this testing fixture has a compact structure and is easy to operate, significantly improving the efficiency and quality of hollow shaft harmonic reducer drive chain testing. It is compatible with various specifications of hollow shaft harmonic reducers, has strong versatility and practicality, and can be widely used in testing work in related fields. It provides strong support for the performance evaluation and optimization of hollow shaft harmonic reducers, and helps to improve the overall performance and stability of mechanical transmission systems. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the hollow shaft harmonic drive chain testing fixture of this utility model;

[0020] Figure 2 This is a three-dimensional view of the transmission chain connection flange structure of the hollow shaft harmonic transmission chain testing fixture of this utility model;

[0021] Figure 3 This is a rear view of the transmission chain connecting flange of the hollow shaft harmonic transmission chain testing fixture of this utility model;

[0022] Figure 4 This is a three-dimensional view of the connection between the slider and the centering clamp of the hollow shaft harmonic drive chain testing fixture of this utility model.

[0023] Figure 5 This is a three-dimensional view of the expansion shaft structure of the hollow shaft harmonic drive chain testing fixture of this utility model.

[0024] In the diagram: 1. Testing platform; 2. Input motor; 3. Expansion shaft; 301. Jacket; 302. Expansion tube; 303. Expansion core; 4. Test base; 5. Transmission chain connecting flange; 501. Stop; 502. Mounting groove; 503. Receiving groove; 504. Slide groove; 6. Centering clamp; 601. Extension bar; 602. Slide bar; 7. Guide rod; 8. Slider; 801. Guide groove; 802. Toothed part; 9. Gear ring; 10. Threaded rod; 11. Hexagonal screw head; 12. Transmission chain collector; 13. Transmission chain output shaft. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be further described below with reference to the accompanying drawings. The following description presents a preferred embodiment of several possible embodiments of this utility model, intended to provide a basic understanding of the utility model, but not intended to identify the key or decisive elements of the utility model or to limit the scope of protection sought.

[0026] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0027] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures. Also, it should be understood that, for ease of description, the dimensions of the various parts shown in the figures are not drawn to actual scale.

[0029] In the description of this utility model, it should be noted that the circuits, electronic components and modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated. The content protected by this utility model does not involve any improvement to the internal structure and method.

[0030] It should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" 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 based on the specific circumstances.

[0031] Please refer to Figure 1 The present invention provides a hollow shaft harmonic drive chain testing fixture, including a testing component, a drive chain connecting flange 5, and a centering mechanism.

[0032] The test components include a test bench 1, an input motor 2, and a transmission chain collector 12. The test bench 1 serves as the basic platform for the entire test fixture, and its surface is continuously provided with multiple positioning slots for installing and fixing the input motor 2 and the transmission chain collector 12 to ensure their stability and accuracy.

[0033] Meanwhile, the test base 4 is also provided on the test bench 1. The transmission chain connecting flange 5 is fixed to the test base 4 by means of flange connection, which ensures the firmness of the connection and the coaxiality between the input motor 2 and the transmission chain connecting flange 5.

[0034] Please see Figure 2 In this embodiment, the centering mechanism is set on the transmission chain connecting flange 5, including three centering clamps 6, three sliders 8, a gear ring 9 and a threaded rod 10. Each centering clamp 6 is housed in the transmission chain connecting flange 5. Each centering clamp 6 is slidably connected to a slider 8, and the sliding angle between the centering clamp 6 and the slider 8 is 45 degrees.

[0035] Please see Figure 3-4 The bottom surface of the centering clamp 6 is provided with multiple sliding strips 602, and the upper surface of the slider 8 is provided with a guide groove 801. The multiple sliding strips 602 are slidably connected to the guide groove 801, and both the sliding strips 602 and the guide groove 801 are inclined at a 45-degree angle to the horizontal or vertical plane. This inclined design makes the relative sliding direction of the centering clamp 6 and the slider 8 perpendicular when the centering clamp 6 slides with the slider 8, thereby controlling the movement of the centering clamp 6 and achieving the centering clamping effect.

[0036] The transmission chain connecting flange 5 is set on the test bench 1 through the test base 4 and is used to install the hollow shaft harmonic reducer. A stop 501 is opened on one side of the flange. The centering clamp 6 is L-shaped and extends into the stop 501. When the hollow shaft harmonic reducer needs to be installed, it is placed into the stop 501 and clamped by the centering clamp 6 to achieve preliminary positioning and fixation.

[0037] To further improve the motion stability and positioning accuracy of the centering block 6, the inner wall of the stop 501 is also provided with a T-shaped longitudinal groove 504. The bottom surface of the centering block 6 is provided with extension strips 601 facing both sides. The extension strips 601 are attached to both ends of the groove 504. During the movement of the centering block 6, the extension strips 601 slide in the groove 504, playing a guiding and limiting role.

[0038] The gear ring 9 is coaxially arranged with the transmission chain connecting flange 5. Each slider 8 has a toothed part 802, which meshes with the gear ring 9. The transmission chain connecting flange 5 has an installation groove 502 on the side away from the stop 501. Multiple guide rods 7 are provided on the inner wall of the installation groove 502. The slider 8 is slidably connected to the guide rods 7.

[0039] Furthermore, the mounting groove 502 and the stop 501 are connected at the sliding groove 504, that is, the bottom surface of the centering clamp 6 extends to the inner wall of the mounting groove 502, which facilitates the sliding connection of the slider 8 to the slider 602 on the bottom surface of the centering clamp 6.

[0040] The threaded rod 10 passes through and is threadedly connected to a slider 8. When the threaded rod 10 is rotated, the threaded rod 10 and the slider 8 are threadedly engaged, causing the slider 8 to slide along the transmission chain connecting flange 5 under the guidance of the guide rod 7. In addition, a receiving groove 503 is provided on one side of the transmission chain connecting flange 5, and the threaded rod 10 extends into the receiving groove 503.

[0041] Understandably, four sliders 8 can be used in the specific implementation. All four sliders 8 are long rectangles and slide against the inner wall of the mounting groove 502, thus ensuring the sliding stability of the sliders 8.

[0042] To facilitate the rotation of the threaded rod 10, a hexagonal screw head 11 is provided on one end of the threaded rod 10 that extends into the receiving groove 503.

[0043] Since the toothed part 802 on the slider 8 meshes with the gear ring 9, when one slider 8 moves, the other sliders 8 are driven to slide synchronously through the transmission of the gear ring 9. This causes the multiple centering clamps 6 that are slidably connected to the slider 8 to move synchronously, thereby clamping and centering the hollow shaft harmonic reducer, ensuring that the reducer maintains a precise center position during the test and improving the accuracy of the test.

[0044] In another alternative embodiment, please refer to Figure 5 The test fixture also includes an expansion shaft 3, which includes a sleeve 301, an expansion tube 302, and an expansion core 303. The expansion shaft 3 is used to connect the input motor 2 and the hollow shaft harmonic reducer to ensure good coaxiality of the transmission.

[0045] The sleeve 301 is a circular sleeve with a slit on one side, which is fitted outside the output end of the input motor 2 and is locked with screws to ensure a tight fit between the expansion shaft 3 and the input motor 2.

[0046] The expansion tube 302 is inserted into the hollow shaft harmonic reducer. The expansion tube 302 is forced to expand and connect to the hollow shaft harmonic reducer through the threaded engagement of the expansion core 303 and the expansion tube 302. This makes the hollow shaft harmonic reducer center and drive, further enhancing the transmission coaxiality of the reducer and preventing loosening or deviation during the test, which would affect the test results.

[0047] The transmission chain collector 12 is connected to the transmission chain output shaft 13, which is connected to the output end of the hollow shaft harmonic reducer. It is used to collect various data of the transmission chain during operation, such as torque, speed, and vibration, so as to provide comprehensive and accurate data support for the subsequent performance evaluation of the hollow shaft harmonic reducer.

[0048] The test bench 1 is fixed with a motor mount by screws. The input motor 2 is connected to the motor mount, which realizes the stable installation and fixation of the input motor 2. At the same time, it is convenient to adjust the position and angle of the input motor 2 to meet different test requirements.

[0049] In this document, the directional terms such as front, back, top, and bottom are defined based on the position of the components in the accompanying drawings and their relative positions to each other, solely for the purpose of clarity and convenience in expressing the technical solution. It should be understood that these are relative concepts and can vary depending on different methods of use and placement; the use of these directional terms should not limit the scope of protection claimed in this application.

[0050] Where there is no conflict, the above embodiments and features described herein can be combined with each other.

[0051] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A testing fixture for a hollow shaft harmonic drive chain, characterized in that, include: The test assembly includes a test stand (1), an input motor (2), and a transmission chain collector (12). The transmission chain connecting flange (5) is set on the test bench (1) and is used to install the hollow shaft harmonic reducer; The centering mechanism is disposed on the transmission chain connecting flange (5). The centering mechanism includes at least three centering clamps (6), a number of sliders (8) equal to the number of centering clamps (6), a gear ring (9), and a threaded rod (10) for driving one of the sliders (8) to slide. Each centering clamp (6) is housed within the transmission chain connecting flange (5). One centering clamp (6) is slidably connected to one of the sliders (8). The sliding angle between the centering clamp (6) and the slider (8) is 45 degrees. The gear ring... (9) At the same time, the toothed part meshes with multiple sliders (8), the threaded rod (10) passes through and is threadedly connected to one of the sliders (8), and the threaded rod (10) rotates and is threadedly engaged with one slider (8), so that the slider (8) slides in the transmission chain connecting flange (5). Through the meshing of the slider (8) and the gear ring (9), multiple sliders (8) meshing with the gear ring (9) slide synchronously, so that multiple centering clamps (6) slidably connected to the slider (8) move synchronously, and clamp and center the hollow shaft harmonic reducer.

2. The hollow shaft harmonic drive chain testing fixture as described in claim 1, characterized in that: A stop (501) is provided on one side of the transmission chain connecting flange (5). The centering clamp (6) is L-shaped and extends into the stop (501). After the hollow shaft harmonic reducer is inserted, it can be clamped by the centering clamp (6).

3. The hollow shaft harmonic drive chain testing fixture as described in claim 2, characterized in that: The inner wall of the stop (501) is also provided with a slide groove (504) with a longitudinal cross section of T. The bottom surface of the centering clamp (6) is provided with extension strips (601) facing both sides, and the extension strips (601) are attached to both ends of the slide groove (504).

4. The hollow shaft harmonic drive chain testing fixture as described in claim 1, characterized in that: The bottom surface of the centering clamp (6) is provided with multiple slide bars (602), and the upper surface of the slider (8) is provided with a slide groove (801). The multiple slide bars (602) are slidably connected to the slide groove (801), and both the slide bars (602) and the slide groove (801) are inclined at a 45-degree angle to the horizontal or vertical plane.

5. The hollow shaft harmonic drive chain testing fixture as described in claim 2, characterized in that: The transmission chain connecting flange (5) has an installation groove (502) on the side away from the stop (501). The inner wall of the installation groove (502) is provided with a plurality of guide rods (7), and the slider (8) is slidably connected to the guide rods (7).

6. The hollow shaft harmonic drive chain testing fixture as described in claim 1, characterized in that: The gear ring (9) and the transmission chain connecting flange (5) are coaxially arranged, and each of the sliders (8) has a toothed portion (802), and each of the toothed portions (802) meshes with the gear ring (9).

7. The hollow shaft harmonic drive chain testing fixture as described in claim 1, characterized in that: It also includes an expansion shaft (3), which includes a sleeve (301), an expansion tube (302) and an expansion core (303). The sleeve (301) is fitted outside the output end of the input motor (2) and is locked by screws. The expansion tube (302) is inserted into the hollow shaft harmonic reducer, so that the hollow shaft harmonic reducer is centered and driven.

8. The hollow shaft harmonic drive train testing fixture as described in claim 1, characterized in that: The surface of the testing platform (1) is provided with multiple positioning slots to facilitate the setting of the input motor (2) and the transmission chain collector (12). The testing platform (1) is also provided with a test base (4), and the transmission chain connecting flange (5) is connected to the flange of the test base (4).

9. The hollow shaft harmonic drive chain testing fixture as described in claim 1, characterized in that: The transmission chain collector (12) is connected to a transmission chain output shaft (13), which is connected to the output end of the hollow shaft harmonic reducer.

10. The hollow shaft harmonic drive chain testing fixture as described in claim 1, characterized in that: The testing platform (1) is fixed with a motor base by screws, and the input motor (2) is connected to the motor base.

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