A tooling for quickly measuring the backlash of a harmonic reducer

Abstract

This utility model discloses a fixture for rapidly measuring the backlash of a harmonic reducer, relating to the field of reducer testing technology. It includes a clamping structure, a reducer body, a base, a backlash conversion component, and a backlash measurement component. The clamping structure is fixedly installed on the top of the base, and the reducer body is mounted on the clamping structure. The backlash conversion component includes a transmission component, a measuring arm, and a connecting ring. The transmission component is mounted on the output shaft of the reducer body. This fixture for rapidly measuring the backlash of a harmonic reducer maintains the stability of the reducer body through the clamping structure. When the backlash conversion component is connected to the output shaft of the reducer body, a dial indicator and a spring scale are used to measure the backlash of the reducer body by inspecting the measuring arm. This backlash measurement fixture has a simple structure and is easy to operate. While meeting technical requirements, it significantly improves testing efficiency and reduces testing costs, greatly enhancing the practicality of the device.

Description

Technical Field

[0001] This utility model relates to the field of speed reducer testing technology, and more specifically, to a tooling for quickly measuring the backlash of a harmonic speed reducer. Background Technology

[0002] Harmonic reducers are transmission devices commonly used in robotics, aerospace, and precision machinery. They offer advantages such as high torque, high precision, compactness, and low backlash. Their main structure includes components such as a wave generator, a flexible wheel, and a rigid wheel. Due to the interaction of these key structures, the transmission accuracy of harmonic reducers has received considerable attention.

[0003] Backlash refers to the gap between the driving and driven components in a transmission system. Backlash affects the motion accuracy and response speed of a harmonic reducer, especially under high loads or high speeds, where it can lead to transmission instability and thus impact equipment performance. Measuring and controlling backlash is crucial, particularly during the manufacturing and performance testing of harmonic reducers.

[0004] Common methods for measuring side clearance include contact measurement and non-contact measurement. Contact measurement uses a measuring probe to directly contact the gap between the flexible wheel and the rigid wheel, and the instrument detects changes in contact to determine the side clearance. This method is simple to operate, but it is limited by the accuracy of the probe and the influence of contact force, which may introduce errors. Non-contact measurement uses detectors, such as laser displacement sensors and optical measurement. These methods have high accuracy and are not affected by contact force, but they are more expensive and the equipment is more complex, making them unsuitable for mass production. Therefore, there is an urgent need in the market for a side clearance measurement device that is simple to operate, highly accurate, and low in cost to solve these problems. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a tooling for quickly measuring the backlash of a harmonic reducer, so as to improve the accuracy of backlash measurement while effectively reducing the difficulty of operation and the cost of use, and to facilitate the structural performance testing of mass-produced reducers.

[0006] To achieve the above objectives, this utility model provides a tooling for quickly measuring the backlash of a harmonic reducer, including a clamping structure and a reducer body, and further comprising:

[0007] The base, the clamping structure is fixedly installed on the top of the base, and the reducer body is installed on the clamping structure;

[0008] The backlash conversion assembly includes a transmission component mounted on the output shaft of the reducer body, a measuring arm mounted on the top of the transmission component, and a connecting ring mounted on one side of the measuring arm along its length. The transmission component is used to connect to the output shaft of the reducer body.

[0009] The clearance measuring assembly includes a sliding seat mounted on the base, a dial indicator mounted on the sliding seat, and a spring scale connected to the connecting ring. The measuring rod of the dial indicator presses against one side of the measuring arm in the width direction, and the spring scale is located on the side of the measuring arm away from the dial indicator.

[0010] The spring scale is used to pull the measuring arm to rotate, thereby causing the measuring arm to rotate towards the dial indicator from the side away from the connecting ring, so that the measuring rod of the dial indicator is compressed by force, thereby detecting the backlash of the reduced gear body after conversion.

[0011] Furthermore, the sliding base includes two parallel linear rails fixed to the top of the base, a slider slidably mounted on the linear rails, a mounting plate horizontally mounted on the top of the two sliders, a vertical rod mounted on the top of the mounting plate, a horizontal bar mounted on the vertical rod, and a connecting component vertically mounted on the horizontal bar for fixing the dial indicator.

[0012] Furthermore, the connecting component includes two symmetrically arranged clamping plates, a bolt horizontally inserted through the middle of the two clamping plates, and a nut threaded onto the outside of the bolt.

[0013] Furthermore, each of the two clamping plates has a first arc-shaped groove and a second arc-shaped groove symmetrically distributed on one side, and the inner diameter of the first arc-shaped groove is adapted to the outer wall size of the measuring rod on the dial indicator, and the inner diameter of the second arc-shaped groove is adapted to the outer wall size of the crossbar.

[0014] Furthermore, the transmission component includes a connecting sleeve and a connecting rod arranged coaxially. A vertical slit is provided at the bottom of the transmission component, and the slit extends through the connecting sleeve to the middle of the connecting rod. The outer wall size of the connecting sleeve is smaller than the inner wall size of the output shaft of the reducer body. A vertical cut surface is provided on one side of the connecting sleeve located at the slit.

[0015] Furthermore, the transmission component also includes an adjusting screw that is horizontally threaded onto the side of the connecting sleeve with a cut surface, and a locking block that is fixedly installed on the side of the connecting sleeve with a cut surface, with the adjusting screw located above the locking block.

[0016] Furthermore, the reducer body is a harmonic reducer, and a connection slot is provided on the output shaft end face of the reducer body. A keyway is provided on the inner wall of the connection slot, and the width of the locking block is adapted to the width of the inner wall of the keyway.

[0017] Furthermore, a through hole is vertically opened at the center of the measuring arm, and the size of the through hole is adapted to the outer wall size of the connecting optical rod.

[0018] Furthermore, a screw is horizontally inserted on one side of the measuring arm in the width direction, and a threaded groove adapted to the screw thread is opened on one side of the measuring arm in the width direction. A through hole adapted to the sliding of the screw is opened on the top of the connecting rod in the horizontal direction.

[0019] Furthermore, the clamping structure is a bench vise, which includes a fixed vise body mounted on a base, a movable vise body that slides with the fixed vise body, and a transmission screw for driving the movable vise body to move on the fixed vise body.

[0020] Compared with the prior art, this utility model has the following advantages and effects:

[0021] The fixture for quickly measuring the backlash of a harmonic reducer in this invention uses a clamping structure to keep the reducer body installed stably. This allows for the conversion and measurement of the backlash size of the reducer body by using a dial indicator and a spring scale to check the measuring arm when the backlash conversion component is connected to the output shaft of the reducer body. This backlash measurement fixture has a simple structure and is easy to operate. It can significantly improve the testing efficiency and reduce the testing cost while meeting technical requirements, and facilitates the testing of the structural performance of mass-produced reducers. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the tooling for rapidly measuring the backlash of a harmonic reducer in an embodiment of this utility model.

[0023] Figure 2 for Figure 1 Schematic diagram of the structure at point A;

[0024] Figure 3 This is a top view of the tooling for rapidly measuring the backlash of a harmonic reducer in an embodiment of this utility model.

[0025] Figure 4 This is a side view cross-sectional structural diagram of the transmission component of the tooling for rapidly measuring the backlash of a harmonic reducer in an embodiment of this utility model.

[0026] Figure 5 This is a front view cross-sectional structural diagram of the connecting component of the tooling for quickly measuring the backlash of a harmonic reducer in an embodiment of this utility model.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1-Base;

[0029] 2-Clamping structure;

[0030] 3-Reducer body;

[0031] 4-Side clearance conversion component;

[0032] 41-Transmission component; 411-Connecting sleeve; 412-Connecting guide rod; 413-Clamping block; 414-Adjusting screw; 42-Measuring arm; 421-Screw; 43-Connecting ring;

[0033] 5-Side clearance measurement assembly.

[0034] 51-Digital indicator; 52-Spring scale; 53-Sliding seat; 531-Linear rail; 532-Slider; 533-Mounting plate; 534-Upright pole; 535-Horizontal bar; 536-Connecting component; 5361-Clamping plate; 5362-Bolt; 5363-Nut. Detailed Implementation

[0035] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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; they can also refer to the internal connection of two components; and they can refer to a wireless connection or a wired connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] Please see Figure 1-5 As shown, this utility model embodiment provides a tooling for quickly measuring the backlash of a harmonic reducer, including a clamping structure 2, a reducer body 3, a base 1, a backlash conversion component 4, and a backlash measurement component 5.

[0038] The clamping structure 2 is fixedly installed on the top of the base 1, and the reducer body 3 is installed on the clamping structure 2. This allows for the positioning and installation of the reducer body 3 using the clamping structure 2, and ensures that the output shaft of the reducer body 3 faces upward.

[0039] The backlash conversion assembly 4 includes a transmission component 41, a measuring arm 42, and a connecting ring 43. The transmission component 41 is mounted on the output shaft of the reducer body 3, the measuring arm 42 is mounted on the top of the transmission component 41, and the connecting ring 43 is mounted on one side of the measuring arm 42 along its length. This allows the backlash of the reducer body 3 to be reflected in the movement of the measuring arm 42 using the backlash conversion assembly 4.

[0040] The side clearance measuring assembly 5 includes a sliding seat 53, a dial indicator 51, and a spring scale 52. The sliding seat 53 is mounted on the base 1, the dial indicator 51 is mounted on the sliding seat 53, and the spring scale 52 is connected to the measuring arm 42 by a connecting ring 43. The dial indicator 51 and the spring scale 52 are located on opposite sides of the measuring arm 42 in the width direction, and the measuring rod of the dial indicator 51 presses against one side of the measuring arm 42 in the width direction.

[0041] The spring scale 52 is used to pull the measuring arm 42 to rotate, so that the side of the measuring arm 42 away from the connecting ring 43 rotates towards the dial indicator 51, so that the measuring rod of the dial indicator 51 is subjected to force and retracts, thereby detecting the side clearance of the converted reducer body 3.

[0042] Please see Figure 1-3 As shown, the sliding seat 53 includes a linear guide 531, a slider 532, a mounting plate 533, a vertical rod 534, a horizontal rod 535, and a connecting component 536, wherein:

[0043] Two linear guides 531 are fixed parallel to each other on the top of the base 1. A slider 532 is slidably mounted on the linear guides 531. A mounting plate 533 is horizontally mounted on the top of the two sliders 532. A vertical rod 534 is vertically mounted on the top of the mounting plate 533. A horizontal bar 535 is horizontally mounted on the vertical rod 534 and vertically mounted on the horizontal bar 535, serving as a connecting part 536 for fixing the dial indicator 51.

[0044] As a further description of the above scheme, the sliding seat 53 is set so that the dial indicator 51 and the measuring arm 42 are at the same horizontal position, and the cooperation between the linear guide 531 and the slider 532 can realize the lateral position adjustment of the dial indicator 51, so that the dial indicator 51 can be made to contact the measuring arm 42 by adjusting the position of the slider 532 before the side clearance measurement.

[0045] Please see Figure 1 , Figure 3 and Figure 5 As shown, the connecting component 536 includes a clamping plate 5361, a bolt 5362, and a nut 5363. The two clamping plates 5361 are symmetrically arranged, the bolt 5362 is horizontally inserted through the middle of the two clamping plates 5361, and the nut 5363 is threadedly installed on the outside of the bolt 5362. This allows for adjustment of the distance between the two clamping plates 5361 by adjusting the nut 5363 threaded on the bolt 5362, so that when the two clamping plates 5361 are brought together, they can clamp the measuring rod and crossbar 535 of the dial indicator 51.

[0046] Please see Figure 5As shown, each of the two clamping plates 5361 has a first arc-shaped groove and a second arc-shaped groove symmetrically distributed vertically on one side. The inner diameter of the first arc-shaped groove is adapted to the outer wall size of the measuring rod on the dial indicator 51, and the inner diameter of the second arc-shaped groove is adapted to the outer wall size of the crossbar 535. This allows the first and second arc-shaped grooves to restrict the vertical movement of the measuring rod and crossbar 535 on the dial indicator 51 when the two clamping plates 5361 are brought together, thus ensuring the stability of the dial indicator 51.

[0047] Please see Figure 1-4 As shown, the transmission component 41 includes a connecting sleeve 411 and a connecting rod 412 arranged coaxially. A vertical slit is provided at the bottom of the transmission component 41, and the slit extends through the connecting sleeve 411 to the middle of the connecting rod 412. The outer wall size of the connecting sleeve 411 is smaller than the inner wall size of the output shaft of the reducer body 3. A vertical cut surface is provided on one side of the connecting sleeve 411 located at the slit.

[0048] As a further description of the above solution, the slit setting allows the portion of the connecting sleeve 411 located on both sides of the slit to be slightly opened or contracted. This not only facilitates the assembly and disassembly of the output shaft of the reducer body 3 and the connecting sleeve 411, but also ensures that the connecting sleeve 411 and the output shaft of the reducer body 3 are securely installed when connecting the output shaft and the connecting sleeve 411.

[0049] Please see Figure 1-4 As shown, the transmission component 41 also includes an adjusting screw 414 that is horizontally threaded onto the side of the connecting sleeve 411 with the cut surface, and a locking block 413 that is fixedly installed on the side of the connecting sleeve 411 with the cut surface. The end of the adjusting screw 414 is rotatably connected to the inner wall of the connecting sleeve 411 away from the cut surface, and the adjusting screw 414 is located above the locking block 413. This facilitates the opening and closing adjustment of both sides of the cut surface of the connecting sleeve 411 by means of the adjusting screw 414.

[0050] Please see Figure 1-3 As shown, the reducer body 3 is a harmonic reducer. A connecting slot is provided on the output shaft end face of the reducer body 3. A keyway is provided on the inner wall of the connecting slot. The width of the locking block 413 is adapted to the width of the inner wall of the keyway. This allows the keyway and the locking block 413 to cooperate in restricting the relative rotation between the output shaft of the reducer body 3 and the transmission component 41, thereby allowing the transmission component 41 to rotate with the output shaft of the reducer body 3.

[0051] Please see Figure 1-4 As shown, a through hole is vertically opened at the center of the measuring arm 42, and the size of the through hole is adapted to the outer wall size of the connecting optical rod 412; so that the connecting optical rod 412 can pass through the measuring arm 42 through the provided through hole.

[0052] Please see Figure 1-4As shown, a screw 421 is horizontally inserted through one side of the measuring arm 42 in the width direction, and a threaded groove adapted to the thread of the screw 421 is opened on one side of the measuring arm 42 in the width direction. A through hole adapted to the sliding of the screw 421 is opened at the top of the connecting rod 412. This facilitates the installation of the screw 421 by using the threaded groove in the measuring arm 42. When the screw 421 passes through the connecting rod 412 through the through hole, it can fix the measuring arm 42 to the connecting rod 412, thereby facilitating the synchronous rotation of the measuring arm 42 and the connecting rod 412 in the transmission component 41.

[0053] Please see Figure 1-3 As shown, the clamping structure 2 is a bench vise. The bench vise includes a fixed vise body mounted on the base 1, a movable vise body that slides with the fixed vise body, and a transmission screw for driving the movable vise body to move on the fixed vise body. The bench vise facilitates the installation of the reducer body 3 and ensures the stability of the reducer body 3 during installation.

[0054] The working process of the above-mentioned tooling for quickly measuring the backlash of a harmonic reducer is as follows:

[0055] When measuring the backlash of the reducer body 3, the tooling for quickly measuring the backlash of the harmonic reducer first needs to fix the reducer body 3 onto the clamping structure 2, with the output shaft end face of the reducer body 3 facing upwards. Then, the connecting sleeve 411 in the transmission component 41 is inserted into the connecting slot provided on the output shaft, and the locking block 413 on the connecting sleeve 411 is fitted into the keyway of the output shaft of the reducer body 3.

[0056] During the connection of the transmission component 41 and the output shaft of the reducer body 3, the connecting sleeve 411 can be slightly opened or closed by rotating the adjusting screw 414, so as to keep the transmission component 41 and the output shaft of the reducer body 3 firmly installed and make the connection and disassembly of the transmission component 41 and the output shaft of the reducer body 3 convenient.

[0057] Next, the measuring arm 42 needs to be installed on the connecting rod 412 on the transmission component 41. Screws 421 are installed in the measuring arm 42 so that the screws 421 can pass through the connecting rod 412, so that the measuring arm 42 can be fixed to the transmission component 41 by the screws 421. After the measuring arm 42 is installed, the connection between the spring scale 52 and one end of the measuring arm 42 can be achieved by the cooperation between the hook on the spring scale 52 and the connecting ring 43 on the measuring arm 42.

[0058] Next, the dial indicator 51 needs to be installed onto the crossbar 535 using the connecting part 536. When installing the dial indicator 51, first move the dial indicator 51 directly above the crossbar 535 so that the dial indicator 51 and the crossbar 535 are between the two clamping plates 5361. Then, simply turn the nut 5363 on the threaded bolt 5362 to adjust the distance between the two clamping plates 5361, so that the two clamping plates 5361 come together to clamp the measuring rod on the dial indicator 51 and the crossbar 535, thereby keeping the installation of the dial indicator 51 and the crossbar 535 stable.

[0059] After the dial indicator 51 is installed, the lateral position of the dial indicator 51 needs to be adjusted by the cooperation of the linear guide 531 and the slider 532, so that the dial indicator 51 can contact the measuring arm 42 by adjusting the position of the slider 532 before measuring the side clearance.

[0060] Then, the backlash of the reducer body 3 can be detected by pulling the spring scale 52. When the test is performed, pulling the spring scale 52 will cause the measuring arm 42 to drive the output shaft of the reducer body 3 to rotate through the transmission component 41, so that the size of the backlash can be easily reflected by the measuring arm 42. During the rotation of the measuring arm 42, the measuring rod on the dial indicator 51 is squeezed and can be slightly contracted, and the change of value is displayed by the pointer on the dial indicator 51. At this time, the size of the backlash of the reducer body 3 can be obtained by simple conversion.

[0061] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the protection scope of this invention.

Claims

1. A tooling for rapidly measuring the backlash of a harmonic reducer, comprising a clamping structure (2) and a reducer body (3), characterized in that... It also includes: The base (1) is fixedly installed on the top of the base (1), and the reducer body (3) is installed on the clamping structure (2); The backlash conversion assembly (4) includes a transmission component (41) mounted on the output shaft of the reducer body (3), a measuring arm (42) mounted on the top of the transmission component (41), and a connecting ring (43) mounted on one side of the measuring arm (42) in the length direction. The side clearance measuring assembly (5) includes a sliding seat (53) mounted on the base (1), a dial indicator (51) mounted on the sliding seat (53), and a spring scale (52) connected to the connecting ring (43). The measuring rod of the dial indicator (51) presses against one side of the measuring arm (42) in the width direction, and the spring scale (52) is located on the side of the measuring arm (42) away from the dial indicator (51). By pulling the spring scale (52), the measuring arm (42) is driven to rotate, thereby causing the measuring arm (42) to rotate towards the dial indicator (51) from the side away from the connecting ring (43), so that the measuring rod of the dial indicator (51) is compressed by force, thereby detecting the side clearance of the reduced gear body (3) after conversion.

2. The tooling for quickly measuring the side gap size of a harmonic reducer according to claim 1, wherein, The sliding seat (53) includes two parallel linear rails (531) fixed to the top of the base (1), a slider (532) slidably mounted on the linear rails (531), a mounting plate (533) horizontally mounted on the top of the two sliders (532), a vertical rod (534) vertically mounted on the top of the mounting plate (533), a horizontal bar (535) horizontally mounted on the vertical rod (534), and a connecting component (536) vertically mounted on the horizontal bar (535) for fixing the dial indicator (51).

3. The tool for quickly measuring the side gap size of a harmonic reducer according to claim 2, wherein The connecting component (536) includes two symmetrically arranged clamps (5361), a bolt (5362) horizontally inserted in the middle of the two clamps (5361), and a nut (5363) threaded onto the outside of the bolt (5362).

4. The tool for quickly measuring the side gap size of a harmonic reducer of claim 3, wherein, The two clamps (5361) are provided with a first arc-shaped groove and a second arc-shaped groove symmetrically distributed on opposite sides. The inner diameter of the first arc-shaped groove is adapted to the outer wall size of the measuring rod on the dial indicator (51), and the inner diameter of the second arc-shaped groove is adapted to the outer wall size of the crossbar (535).

5. The tool for quickly measuring the side gap size of a harmonic reducer of claim 1, wherein, The transmission component (41) includes a connecting sleeve (411) and a connecting rod (412) arranged coaxially. The bottom of the transmission component (41) is vertically slit, and the slit extends through the connecting sleeve (411) to the middle of the connecting rod (412). The outer wall size of the connecting sleeve (411) is smaller than the inner wall size of the output shaft of the reducer body (3). The connecting sleeve (411) has a vertical cut surface on one side of the slit.

6. The tool for quickly measuring the side gap size of a harmonic reducer of claim 5, wherein, The transmission component (41) further includes an adjusting screw (414) that is horizontally threaded onto the side of the connecting sleeve (411) with a cut surface, and a locking block (413) that is fixedly installed on the side of the connecting sleeve (411) with a cut surface, wherein the adjusting screw (414) is located above the locking block (413).

7. The tool for quickly measuring the side gap size of a harmonic reducer according to claim 6, wherein The reducer body (3) is a harmonic reducer. A connection slot is provided on the output shaft end face of the reducer body (3). A keyway is provided on the inner wall of the connection slot. The width of the locking block (413) is adapted to the width of the inner wall of the keyway.

8. The tool for quickly measuring the side gap size of a harmonic reducer of claim 5, wherein, The measuring arm (42) has a vertical through hole at its center, and the size of the through hole is adapted to the outer wall size of the connecting rod (412).

9. The tool for quickly measuring the side gap size of a harmonic reducer of claim 6, wherein, A screw (421) is horizontally inserted on one side of the measuring arm (42) in the width direction. A threaded groove adapted to the thread of the screw (421) is opened on one side of the measuring arm (42) in the width direction. A through hole adapted to the sliding of the screw (421) is opened on the top of the connecting rod (412).

10. The tool for quickly measuring the side gap size of a harmonic reducer of claim 1, wherein, The clamping structure (2) is a bench vise, which includes a fixed vise body mounted on a base (1), a movable vise body that slides with the fixed vise body, and a transmission screw for driving the movable vise body to move on the fixed vise body.

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