Reverse self-locking planetary reducer
By introducing a ratchet and pawl structure into the planetary reducer, the problem of gear wear caused by reverse rotation when the motor stops is solved, achieving self-locking protection and convenient installation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUBEI CHENGRUI MACHINERY EQUIPMENT CO LTD
- Filing Date
- 2025-06-11
- Publication Date
- 2026-04-28
AI Technical Summary
In some devices, when the motor stops, the planetary reducer rotates in reverse, causing wear on the gear set and increasing the damage rate.
It adopts a self-locking component, including a ratchet and pawl structure. The pawl is pushed by a spring to engage with the ratchet to prevent reverse rotation. Combined with the fixing component, it can achieve quick connection and fixation.
It effectively prevents the planetary reducer from rotating in the opposite direction, protects the gear set, and is easy to operate, saving time and effort.
Smart Images
Figure CN224174450U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of planetary gear reducers, and in particular to a reverse self-locking planetary gear reducer. Background Technology
[0002] Planetary gear reducers are a common type of speed reduction device, widely used in mechanical transmission systems. Their main function is to reduce input speed and increase output torque. They consist of a sun gear, planetary gears, planet carriers, and an outer ring gear. The working principle is that the sun gear drives multiple planetary gears to rotate, and the planetary gears transmit power by meshing with the outer ring gear. Finally, the output shaft transmits the reduced torque.
[0003] The main advantages of planetary gear reducers are their high efficiency, compact structure, and excellent load distribution capability. Because multiple planetary gears work together, the load can be effectively shared, reducing the working pressure on individual gears, thereby improving the stability and durability of the transmission system. It has a high power density, can achieve the transmission of large torque in a limited space, and has a small size and weight.
[0004] When using a planetary reducer, the output torque is increased and the speed is reduced by the motor drive, which then drives the device to run. However, in some devices, when the motor stops, the device will drive the planetary reducer to rotate in the opposite direction. This will cause reverse wear on the gear set inside the planetary reducer, increasing the damage rate. To solve this problem, a reverse self-locking planetary reducer is proposed. Utility Model Content
[0005] To overcome the above shortcomings, this utility model provides a reverse self-locking planetary reducer, which aims to improve the problem that in some devices, when the motor stops, the device will drive the planetary reducer to rotate in the opposite direction, which will cause reverse wear on the gear set inside the planetary reducer and increase the damage rate.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: a reverse self-locking planetary reducer, comprising a housing, a flange one fixedly connected to the left side of the housing, a flange two fixedly connected to the right side of the housing, an output shaft rotatably connected to the left side of the housing, a motor inserted into the right side of the housing, a self-locking component installed on the left side of the flange one, and a fixing component installed on the left side of the motor;
[0007] The self-locking assembly includes a fixed housing, the right side of which is fixedly connected to the left side of the flange. A ratchet is rotatably connected to the inner wall of the fixed housing, and four pawls are rotatably connected to the inner wall of the fixed housing. The pawls and the ratchet are engaged. A spring is fixedly connected to the outside of the pawls.
[0008] As a further description of the above technical solution:
[0009] The fixing assembly includes four housings. The right side of each housing is fixedly connected to the left side of the motor. A push rod is slidably connected inside each housing. A slide plate is fixedly connected to the right end of the push rod. A spring is fixedly connected to the rear side of the slide plate. A fixing block is fixedly connected to the right side of the push rod. Four connecting rods are rotatably connected to the outside of the fixing block. A stop block is rotatably connected to the outside of the connecting rods.
[0010] As a further description of the above technical solution:
[0011] The inner side of the ratchet is fixedly connected to the outside of the output shaft, and the outer side of the spring is fixedly connected to the inner wall of the fixed housing.
[0012] As a further description of the above technical solution:
[0013] The output shaft is externally rotatably connected to the inside of the fixed housing, and the pawls are distributed in concentric circles at equal intervals.
[0014] As a further description of the above technical solution:
[0015] The left side of the motor and the right side of the second flange abut each other.
[0016] As a further description of the above technical solution:
[0017] The outer casing is slidably connected to the inside of the second flange, and the outer slide plate is slidably connected to the inner wall of the casing.
[0018] As a further description of the above technical solution:
[0019] The right end of the second spring is fixedly connected to the inner wall of the housing, and the right side of the fixing block is fixedly connected to the left side of the slide plate.
[0020] As a further description of the above technical solution:
[0021] The stop block is externally slidably connected to the inside of the housing, the right side of the stop block is slidably connected to the left side of the second flange, and a pressure plate is fixedly connected to the left end of the push rod.
[0022] This utility model has the following beneficial effects:
[0023] 1. In this utility model, the pawl is pushed by a spring to contact the ratchet. When the output shaft rotates forward, it is not affected. When the output shaft rotates in reverse, the pawl will immediately engage and lock with the ratchet, thus preventing the output shaft from rotating in reverse and effectively protecting the gear set inside the housing.
[0024] 2. In this utility model, by pressing the push rod, the slide plate is driven to compress the second spring. At the same time, the fixing block starts to pull the connecting rod to drive the stop block to retract into the housing. At this time, the flange second is inserted into the outside of the housing and the push rod is released, so that the stop block pops out. This realizes that the housing can be quickly connected and fixed to the motor, which is convenient, time-saving and labor-saving. Attached Figure Description
[0025] Figure 1 This is a three-dimensional schematic diagram of a reverse self-locking planetary reducer proposed in this utility model;
[0026] Figure 2 This is a schematic diagram of the ratchet structure of a reverse self-locking planetary reducer proposed in this utility model;
[0027] Figure 3 This is a schematic diagram of the structure of the stop block of a reverse self-locking planetary reducer proposed in this utility model;
[0028] Figure 4 This is a schematic diagram of the motor structure of a reverse self-locking planetary reducer proposed in this utility model;
[0029] Figure 5 This is a schematic diagram of the housing of a reverse self-locking planetary reducer proposed in this utility model.
[0030] Legend:
[0031] 1. Outer shell; 2. Flange 1; 3. Flange 2; 4. Output shaft; 5. Fixed shell; 6. Ratchet; 7. Pad; 8. Spring 1; 9. Motor; 10. Housing; 11. Push rod; 12. Slide plate; 13. Spring 2; 14. Fixed block; 15. Connecting rod; 16. Stop block; 17. Pressure plate. Detailed Implementation
[0032] 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.
[0033] Reference Figure 1 - Figure 5This utility model provides an embodiment of a reverse self-locking planetary reducer, comprising a housing 1, a flange 2 fixedly connected to the left side of the housing 1, a flange 3 fixedly connected to the right side of the housing 1, an output shaft 4 rotatably connected to the left side of the housing 1, and a motor 9 inserted into the right side of the housing 1. The housing 1 is used to protect the internal planetary gear set. The flanges 2 and 3 are for facilitating the fixing of the housing 1 to other equipment. The output shaft 4 is used to output power, and the motor 9 is used to provide rotational force to the housing 1. The output end of the motor 9 is flat and directly inserted into the input end of the planetary reducer, which fits perfectly with the input end interface of the planetary reducer. A self-locking component is installed on the left side of the flange 2, and a fixing component is installed on the left side of the motor 9.
[0034] The self-locking assembly includes a fixed housing 5, with its right side fixedly connected to the left side of flange 2. A ratchet 6 is rotatably connected to the inner wall of the fixed housing 5, and four pawls 7 are rotatably connected to the inner wall of the fixed housing 5. The pawls 7 and ratchet 6 engage with each other. A spring 8 is fixedly connected to the outside of the pawls 7. The fixed housing 5 is used to protect and connect other parts. The ratchet 6 is used to cooperate with the pawls 7 to achieve locking. The pawls 7 are used to prevent the ratchet 6 from rotating in the opposite direction. The spring 8 is used to push the pawls 7 to abut against the ratchet 6. The inside of the ratchet 6 is fixedly connected to the outside of the output shaft 4, so that the output shaft 4 can drive the ratchet 6 to rotate synchronously. The outside of the spring 8 is fixedly connected to the inner wall of the fixed housing 5 to keep the spring 8 stable. The outside of the output shaft 4 is rotatably connected to the inside of the fixed housing 5 to keep the output shaft 4 stable. The pawls 7 are concentrically distributed at equal intervals so that the force is the same when locking. The left side of the motor 9 and the right side of flange 2 3 abut against each other for easy installation.
[0035] Reference Figure 1 - Figure 3The fixing assembly includes four housings 10. The right side of each housing 10 is fixedly connected to the left side of the motor 9. A push rod 11 is slidably connected inside the housing 10. A slide plate 12 is fixedly connected to the right end of the push rod 11. A second spring 13 is fixedly connected to the rear side of the slide plate 12. A fixing block 14 is fixedly connected to the right side of the push rod 11. Four connecting rods 15 are rotatably connected to the outside of the fixing block 14. A stop block 16 is rotatably connected to the outside of the connecting rods 15. The housings 10 are used to connect and protect the internal parts. The push rod 11 is used to drive the slide plate 12 to compress the second spring 13 and move the fixing block 14. The slide plate 12 is used to compress the second spring 13 and bear the thrust from the second spring 13. The second spring 13 is used to drive the slide plate 12 to reset and extend the stop block 16. The fixing block 14 is used to drive the connecting rods 15 to move the motor 9. The rod 15 deflects, causing the stop block 16 to move. The stop block 16 is used to block the flange 2 3 for installation and fixation. The outer casing 10 is slidably connected to the inside of the flange 2 3 for installation and fixation. The outer slide plate 12 is slidably connected to the inner wall of the casing 10 to limit the movement direction of the slide plate 12. The right end of the spring 2 13 is fixedly connected to the inner wall of the casing 10 to keep the spring 2 13 stable. The right side of the fixing block 14 is fixedly connected to the left side of the slide plate 12 to make the slide plate 12 and the fixing block 14 move synchronously. The outer stop block 16 is slidably connected to the inside of the casing 10 to limit the movement direction of the stop block 16. The right side of the stop block 16 is slidably connected to the left side of the flange 2 3 for fixation. The left end of the push rod 11 is fixedly connected to the pressure plate 17, which is used to facilitate the movement of the push rod 11.
[0036] Working principle: When using the planetary reducer, first connect the motor 9 to the housing 1. By pressing the push rod 11, the slide plate 12 is driven to compress the second spring 13, causing the fixed block 14 to drive the connecting rod 15 to pull the stop block 16, retracting the stop block 16 into the housing 10. Then, the flange 3 is fitted onto the outside of the housing 10. At this time, the push rod 11 is released, and under the action of the second spring 13, the slide plate 12 is pushed, causing the push rod 11 to return to its original position. This causes the fixed block 14 to drive the connecting rod 15 to push out and unfold the stop block 16, blocking it on the left side of the flange 3, thus achieving installation and fixation. At the same time, the output end of motor 9 slides into the input end of the planetary reducer, which can then drive motor 9. The irregular output end of motor 9 drives the planetary reducer to work and drives the output shaft 4 to rotate. Simultaneously, it drives the ratchet 6 to rotate synchronously. The spring 8 pushes the pawl 7 to abut against the ratchet 6. When the ratchet 6 rotates forward, it is not affected in any way. When the ratchet 6 rotates in reverse, the ratchet 6 will be instantly locked deep into the ratchet 6 to lock the ratchet 6, thereby preventing the output shaft 4 from rotating in reverse. The housing 1 can be quickly connected and fixed to the motor 9. The operation is convenient, time-saving and labor-saving.
[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 reverse self-locking planetary reducer, comprising a housing (1), characterized in that: The outer shell (1) is fixedly connected to a flange one (2) on the left side, and the outer shell (1) is fixedly connected to a flange two (3) on the right side. The outer shell (1) is rotatably connected to an output shaft (4) on the left side. The outer shell (1) is plugged into a motor (9) on the right side. A self-locking component is installed on the left side of the flange one (2), and a fixing component is installed on the left side of the motor (9). The self-locking assembly includes a fixed shell (5), the right side of which is fixedly connected to the left side of the flange (2), a ratchet (6) is rotatably connected to the inner wall of the fixed shell (5), and four pawls (7) are rotatably connected to the inner wall of the fixed shell (5). The pawls (7) and the ratchet (6) are engaged, and a spring (8) is fixedly connected to the outside of the pawls (7).
2. The reverse self-locking planetary reducer according to claim 1, characterized in that: The fixing assembly includes four housings (10). The right side of each housing (10) is fixedly connected to the left side of the motor (9). A push rod (11) is slidably connected inside the housing (10). A slide plate (12) is fixedly connected to the right end of the push rod (11). A spring (13) is fixedly connected to the rear side of the slide plate (12). A fixing block (14) is fixedly connected to the right side of the push rod (11). Four connecting rods (15) are rotatably connected to the outside of the fixing block (14). A stop block (16) is rotatably connected to the outside of the connecting rods (15).
3. The reverse self-locking planetary reducer according to claim 1, characterized in that: The ratchet (6) is fixedly connected to the outside of the output shaft (4) on the inside, and the spring (8) is fixedly connected to the inner wall of the fixed housing (5) on the outside.
4. A reverse self-locking planetary reducer according to claim 1, characterized in that: The output shaft (4) is externally rotatably connected to the inside of the fixed housing (5), and the pawls (7) are distributed in concentric circles at equal intervals.
5. A reverse self-locking planetary reducer according to claim 1, characterized in that: The motor (9) abuts against the left side and the flange (3) on the right side.
6. A reverse self-locking planetary reducer according to claim 2, characterized in that: The outer casing (10) is slidably connected to the inside of the flange (3), and the outer slide plate (12) is slidably connected to the inner wall of the casing (10).
7. A reverse self-locking planetary reducer according to claim 2, characterized in that: The right end of the second spring (13) is fixedly connected to the inner wall of the housing (10), and the right side of the fixing block (14) is fixedly connected to the left side of the slide plate (12).
8. A reverse self-locking planetary reducer according to claim 2, characterized in that: The stop block (16) is externally slidably connected to the inside of the housing (10), the right side of the stop block (16) is slidably connected to the left side of the flange (3), and the left end of the push rod (11) is fixedly connected to the pressure plate (17).