Robot joint driving precision speed reducer
By introducing an auxiliary locking component into the precision reducer that drives the robot joints, and utilizing the squeezing contact between the locking friction ring and the locking ring, the problem of decreased accuracy caused by output shaft loosening is solved, and stable locking of the output shaft and long-term stable operation of the reducer are achieved.
Patent Information
- Application Number
- CN202520499537.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-21
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2035-03-21
AI Technical Summary
After prolonged use, the output shaft of existing precision reducers for robot joint drives is prone to loosening, leading to a decrease in accuracy.
The first and second auxiliary locking parts are used to fix the output shaft by squeezing the locking friction ring with the locking ring, preventing the rotational force from being transmitted to the gear set inside the reducer, and ensuring that the output shaft runs stably and accurately for a long time.
It achieves stable locking of the output shaft in a static state, prevents gear set loosening, and improves the long-term operating stability and accuracy of the reducer.
Smart Images
Figure CN223648498U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of speed reducer technology, specifically a precision speed reducer for robot joint drive. Background Technology
[0002] A speed reducer is an independent component consisting of gear drives, worm drives, or gear-worm drives enclosed in a rigid housing. It is commonly used as a speed reduction transmission device between a prime mover and a driven machine. Its main function is to reduce speed and increase torque, matching the speeds of the prime mover and the driven machine or actuator, and transmitting torque. The working principle of a speed reducer is based on the fundamental laws of gear transmission. When the pinion at the input end (input gear) is directly driven by a power source to rotate at a high speed, it meshes with one or more gears (which can be ordinary gears, planetary gears, etc.). These gears are fixed on different shafts, transmitting power through the meshing between them. Due to the different number of teeth on the gears, the speed decreases and the torque increases when power is transmitted from the input gear to the output gear. The reduction ratio is the ratio of the number of teeth on the input gear to the number of teeth on the output gear; this ratio determines the degree of speed reduction. However, the precision reducers used in existing robot joint drives require high accuracy during use. When the output shaft rotates to a designated position and stops rotating for a long time, the output shaft is subjected to rotational force due to external rotational force, and the internal gears are subjected to squeezing force. After long-term use, the gear set is prone to loosening, resulting in poor accuracy. Therefore, a precision reducer for robot joint drives is needed to solve the above-mentioned problems. Utility Model Content
[0003] The purpose of this invention is to provide a precision reducer for robot joint drive to solve the problems mentioned in the background art.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a precision reducer for robot joint drive, comprising a first auxiliary locking part, a fixed mounting plate, a reducer, a second auxiliary locking part, and an output end. The fixed mounting plate is fixedly connected to the front end of the reducer. The first auxiliary locking part and the second auxiliary locking part are respectively distributed in the middle of the side end of the fixed mounting plate. The output end is disposed at the front end of the reducer. The first auxiliary locking part and the second auxiliary locking part have the same structure.
[0005] Preferably, the output end includes an output shaft, a rotating chuck, and a locking friction ring. The output shaft is fixedly connected to the middle of the front end of the rotating chuck, and the locking friction ring is fixedly installed on the rotating chuck.
[0006] Preferably, the first auxiliary locking part includes an electric push rod, a fixed mounting bracket, a limiting retaining ring, a compression retaining ring, a fixing bolt, a locking ring, and a fixed mounting ring. The electric push rod is fixedly mounted on the fixed mounting bracket. The middle end of the compression retaining ring is slidably engaged with the limiting retaining ring. The driving end of the electric push rod is fixedly connected to the middle end of the compression retaining ring. The fixed mounting ring is fixedly mounted on the compression retaining ring by the fixing bolt. The locking ring is fixedly connected to the middle of the fixed mounting ring.
[0007] Preferably, the locking ring has anti-slip protrusions evenly distributed inside.
[0008] Preferably, the fixed mounting bracket and the limiting ring are fixedly connected to the fixed mounting plate.
[0009] Preferably, the rotating chuck passes through the fixed mounting plate and is rotatably engaged inside the front end of the reducer, and the locking ring and the locking friction ring are in extrusive contact.
[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0011] When the output shaft is in a brief stationary state and does not need to rotate during the use of this utility model, the first and second auxiliary locking parts, with the help of the locking friction ring, can fix and lock the output shaft and the rotating chuck. This prevents the external torsional force on the output shaft drive end from being transmitted to the gear set inside the reducer when it is stationary, so that the reducer can run stably for a long time and the output shaft can run stably and accurately for a long time. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the main three-dimensional structure of the present utility model;
[0013] Figure 2 This is a schematic diagram of the output end structure of this utility model;
[0014] Figure 3 This is a schematic diagram of the first auxiliary locking part of this utility model.
[0015] In the diagram: 1-First auxiliary locking part, 2-Fixed mounting plate, 3-Reducer, 4-Second auxiliary locking part, 5-Output end, 6-Output shaft, 7-Rotating chuck, 8-Locking friction ring, 9-Electric push rod, 10-Fixed mounting bracket, 11-Limiting retaining ring, 12-Crushing retaining ring, 13-Fixing bolt, 14-Locking ring, 15-Fixed mounting ring. Detailed Implementation
[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0017] like Figure 1-3 As shown, one embodiment of this utility model is provided: a precision reducer for driving robot joints, including a first auxiliary locking part 1, a fixed mounting plate 2, a reducer 3, a second auxiliary locking part 4, and an output end 5. The fixed mounting plate 2 is fixedly connected to the front end of the reducer 3. The first auxiliary locking part 1 and the second auxiliary locking part 4 are respectively distributed in the middle of the side end of the fixed mounting plate 2. The output end 5 is located at the front end of the reducer 3. The first auxiliary locking part 1 and the second auxiliary locking part 4 have the same structure.
[0018] The output end 5 includes an output shaft 6, a rotating chuck 7, and a locking friction ring 8. The output shaft 6 is fixedly connected to the middle of the front end of the rotating chuck 7, and the locking friction ring 8 is fixedly installed on the rotating chuck 7.
[0019] The first auxiliary locking part 1 includes an electric push rod 9, a fixed mounting bracket 10, a limiting retaining ring 11, a compression retaining ring 12, a fixing bolt 13, a locking ring 14, and a fixed mounting ring 15. The electric push rod 9 is fixedly mounted on the fixed mounting bracket 10. The middle of the end of the compression retaining ring 12 is slidably engaged with the limiting retaining ring 11. The driving end of the electric push rod 9 is fixedly connected to the middle of the end of the compression retaining ring 12. The fixed mounting ring 15 is fixedly mounted on the compression retaining ring 12 by the fixing bolt 13. The locking ring 14 is fixedly connected to the middle of the fixed mounting ring 15.
[0020] The locking ring 14 has anti-slip protrusions evenly arranged inside, which can fully squeeze and lock the locking ring 8 with the frosted outer end face.
[0021] The fixed mounting bracket 10 and the limiting ring 11 are fixedly connected to the fixed mounting plate 2, serving as a fixed connection.
[0022] The rotating chuck 7 passes through the fixed mounting plate 2 and is rotated and engaged inside the front end of the reducer 3. The locking ring 14 and the locking friction ring 8 are pressed and contacted, which plays an auxiliary role in locking and fixing.
[0023] Working principle: During use, when the output shaft 6 stops rotating and needs to be maintained in a non-rotating state, the electric push rods 9 in the first auxiliary locking part 1 and the second auxiliary locking part 4 operate synchronously. Through the electric push rods 9, the compression rings 12 in the first auxiliary locking part 1 and the second auxiliary locking part 4 can move synchronously towards the rotating chuck 7 along the inside of the limiting ring 11. This causes the locking ring 14 fixed on the compression ring 12 to press and contact the locking friction ring 8, and lock the locking friction ring 8. This allows the output shaft 6 to be stably locked, preventing it from wobbling when rotating and preventing the rotational force from being transmitted to the gear set inside the reducer 3. This allows the gear set inside the reducer 3 to operate stably for a long time without loosening or gaps. It also makes the output shaft 6 stable and secure in operation. The fixing bolts 13 facilitate the removal and fixing of the mounting ring 15 on the compression ring 12, making it easy to replace the locking ring 14.
[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A precision reducer for driving robot joints, comprising a first auxiliary locking part (1), a fixed mounting plate (2), a reducer (3), a second auxiliary locking part (4), and an output end (5), characterized in that: The fixed mounting plate (2) is fixedly connected to the front end of the reducer (3). The first auxiliary locking part (1) and the second auxiliary locking part (4) are respectively distributed in the middle of the side end of the fixed mounting plate (2). The output end (5) is located at the front end of the reducer (3). The first auxiliary locking part (1) and the second auxiliary locking part (4) have the same structure.
2. The precision reducer for robot joint drive according to claim 1, characterized in that: The output end (5) includes an output shaft (6), a rotating chuck (7) and a locking friction ring (8). The output shaft (6) is fixedly connected to the middle of the front end of the rotating chuck (7), and the locking friction ring (8) is fixedly installed on the rotating chuck (7).
3. A precision reducer for driving robot joints according to claim 2, characterized in that: The first auxiliary locking part (1) includes an electric push rod (9), a fixed mounting bracket (10), a limiting ring (11), a compression ring (12), a fixing bolt (13), a locking ring (14), and a fixed mounting ring (15). The electric push rod (9) is fixedly mounted on the fixed mounting bracket (10). The middle part of the end of the compression ring (12) is slidably engaged with the limiting ring (11). The driving end of the electric push rod (9) is fixedly connected to the middle part of the end of the compression ring (12). The fixed mounting ring (15) is fixedly mounted on the compression ring (12) by the fixing bolt (13). The locking ring (14) is fixedly connected to the middle part of the fixed mounting ring (15).
4. A precision reducer for driving robot joints according to claim 3, characterized in that: The locking ring (14) is uniformly provided with anti-slip protrusions inside.
5. A precision reducer for robot joint drive according to claim 4, characterized in that: The fixed mounting bracket (10) and the limiting ring (11) are fixedly connected to the fixed mounting plate (2).
6. A precision reducer for robot joint drive according to claim 5, characterized in that: The rotating chuck (7) passes through the fixed mounting plate (2) and is rotatably engaged inside the front end of the reducer (3). The locking ring (14) and the locking friction ring (8) are pressed together.