Special low-back-clearance planetary reducer for robot
By designing a low-backlash planetary reducer specifically for robots, and employing a double planetary gear structure and deep groove ball bearings, the problems of insufficient radial load and rigidity in existing planetary gear reducers have been solved, achieving more stable and efficient gear meshing.
Patent Information
- Application Number
- CN202520278141.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-20
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2035-02-20
AI Technical Summary
The existing planetary gear reducer has an unreasonable structural design, resulting in low radial load and rigidity, and unstable gear meshing.
It adopts a robot-specific low-backlash planetary reducer, including an input flange, input assembly, output assembly, and output housing, which are connected by bolts. The input assembly and output assembly are connected by transmission. It adopts a double planetary gear structure and deep groove ball bearings to shorten the output end length and improve radial load and rigidity.
It improves the smoothness of gear meshing and transmission accuracy, reduces backlash, and enhances the stability and operating efficiency of the reducer.
Smart Images
Figure CN223806558U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of speed reducer, concretely relates to a low-backlash planetary speed reducer special for robot. BACKGROUND
[0002] The planetary gear speed reducer is one kind of speed reducer, which has the performance of reducing the rotating speed and increasing the output torque. The structure design of the existing planetary gear speed reducer is not reasonable, which makes the radial load and rigidity of the speed reducer lower, and further makes the stability of gear engagement not guaranteed.
[0003] In view of the above, the utility model discloses a low-backlash planetary speed reducer special for robot which can improve the radial load and rigidity of the speed reducer. UTILITY MODEL CONTENTS
[0004] In view of the deficiencies in the prior art, the utility model aims at providing a low-backlash planetary speed reducer special for robot, which has reasonable structure design, is convenient and reliable to use, shortens the length of the output end of the speed reducer, improves the radial load and rigidity of the speed reducer, improves the stability of gear engagement, and effectively improves the comprehensive operation backlash.
[0005] In order to achieve the above-mentioned purpose, the utility model is implemented by the following technical scheme: the low-backlash planetary speed reducer special for robot comprises an input flange, an input assembly, an output assembly and an output housing, the input flange is connected with a first inner gear ring through bolts, the first inner gear ring and the input flange are provided with the input assembly, the input assembly is in transmission connection with the output assembly, the output assembly is arranged in a second inner gear ring, and the second inner gear ring is connected with the output housing through bolts.
[0006] Preferably, the input assembly comprises an input shaft and a sun gear, and the sun gear is arranged on the input shaft; the output assembly comprises an output shaft, a transmission assembly and planetary gears, the planetary gears are arranged in the transmission assembly, the planetary gears are in engagement with the sun gear, the first inner gear ring and the second inner gear ring, and the planetary gears are further connected with the output shaft through the transmission assembly.
[0007] Preferably, the output assembly adopts a double-planetary-gear structure.
[0008] Preferably, a first deep groove ball bearing is further sleeved on the input shaft.
[0009] Preferably, a second deep groove ball bearing is sleeved on the output shaft.
[0010] Preferably, the planetary gears are arranged on gear mounting slots of the transmission assembly, and the number of the planetary gears is not less than three.
[0011] The utility model discloses a beneficial effect: the utility model discloses the structure design is reasonable, the length of speed reducer output end is shortened on the structure, promotes the radial load and rigidity of speed reducer, makes the stability of gear meshing improve, and the comprehensive operation back gap is effectively improved. BRIEF DESCRIPTION OF DRAWINGS
[0012] The utility model discloses in combination with the drawings and specific embodiment will be described in detail below;
[0013] Fig. 1 It is the structural schematic diagram of the utility model discloses;
[0014] Fig. 2 It is the exploded schematic diagram of the utility model discloses. SPECIFIC EMBODIMENT
[0015] In order to make the technical means, creation features, purposes and effects of the utility model easy to understand, the utility model will be further described below in combination with specific embodiments.
[0016] REFERENCE Figs. 1-2 The specific embodiment adopts the following technical scheme: the robot special low back gap planetary reducer includes input flange 1, input assembly 2, output assembly 3 and output casing 4, the input flange 1 is connected with the first inner gear ring 5 through bolt, the first inner gear ring 5 and input flange 1 are provided with input assembly 2, input assembly 2 is transmission connected with output assembly 3, and the second inner gear ring 6 is arranged in output assembly 3, and the second inner gear ring 6 is connected with output casing 4 through bolt.
[0017] It is worth noting that the input assembly 2 includes input shaft 21, sun gear 22, and the input shaft 21 is provided with the sun gear 22;The output assembly 3 includes output shaft 31, transmission assembly 32 and planetary gear 33, the planetary gear 33 is arranged in transmission assembly 32, the planetary gear 33 is engaged with the sun gear 22 and the first inner gear ring 5, the second inner gear ring 6, and the planetary gear 33 is also connected with the output shaft 31 through transmission assembly 32.
[0018] It is worth noting that the output assembly 3 adopts double planetary gear structure.
[0019] It is worth noting that the input shaft 21 is also sleeved with the first deep groove ball bearing 61.
[0020] It is worth noting that the output shaft 31 is sleeved with the second deep groove ball bearing 7.
[0021] In addition, the planetary gear 33 is arranged on the gear mounting groove of transmission assembly 32, and the planetary gear 33 is not less than three.
[0022] The working principle of the embodiment is as follows: the input flange 1 is connected with the first inner gear ring 5 through bolts to form a fixed input end. The input shaft 21 transmits power through the input flange 1, and the sun gear 22 on the input shaft 21 rotates. The sun gear 22 is engaged with the planetary gear 33, and the planetary gear 33 is simultaneously engaged with the first inner gear ring 5 and the second inner gear ring 6. The planetary gear 33 rotates around the sun gear 22 under the driving of the sun gear 22, and realizes the speed reduction effect under the constraint of the first inner gear ring 5 and the second inner gear ring 6. The planetary gear 33 is connected with the output shaft 31 through the transmission assembly 32, and the output shaft 31 rotates under the driving of the planetary gear 33. The output shaft 31 transmits power through the output housing 4 to realize the output of the speed reducer.
[0023] The input flange 1 and the first inner gear ring 5 of the embodiment are connected through bolts, which ensures the stability of the input end. The output assembly 3 is arranged in the second inner gear ring 6 and connected with the output housing 4 through bolts, which ensures the stability of the output end. Through the double planetary gear structure, the length of the output end of the speed reducer is shortened, and the radial load and rigidity of the speed reducer are improved. The planetary gear 33 is engaged with the sun gear 22 and the first inner gear ring 5 and the second inner gear ring 6, which ensures the stability of the gear engagement. The use of the first deep groove ball bearing 61 and the second deep groove ball bearing 7 further improves the stability and precision of the gear transmission. The double planetary gear structure and the reasonable bearing configuration effectively reduce the backlash and improve the transmission precision and response speed of the speed reducer. The overall structure of the embodiment is reasonably designed, the gear engagement is stable, the backlash is small, so that the speed reducer is more stable and efficient during operation.
[0024] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above. It should be understood by those skilled in the art that the utility model is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model can also have various changes and improvements, and these changes and improvements all fall within the scope of the utility model claimed. The scope of protection of the utility model is defined by the appended claims and their equivalents.
Claims
1. A low-backlash planetary reducer dedicated for robots, characterized by, It includes input flange (1), input assembly (2), output assembly (3) and output housing (4), input flange (1) is connected with first inner gear ring (5) through bolt, first inner gear ring (5) and input flange (1) are provided with input assembly (2), input assembly (2) is transmission connection with output assembly (3), output assembly (3) is provided in second inner gear ring (6), second inner gear ring (6) is connected with output housing (4) through bolt.
2. The robot-specific low-backlash planetary reducer of claim 1, wherein, The input assembly (2) includes an input shaft (21) and a sun gear (22), the sun gear (22) is arranged on the input shaft (21); the output assembly (3) includes an output shaft (31), a transmission assembly (32) and a planetary gear (33), the planetary gear (33) is arranged in the transmission assembly (32), the planetary gear (33) is engaged with the sun gear (22), the first inner gear ring (5) and the second inner gear ring (6), and the planetary gear (33) is also connected with the output shaft (31) through the transmission assembly (32).
3. The robot-specific low-backlash planetary reducer of claim 1, wherein, The output assembly (3) adopts a double planetary gear structure.
4. The robot-specific low-backlash planetary reducer of claim 2, wherein, The input shaft (21) is further sleeved with a first deep groove ball bearing (61).
5. The robot-specific low-backlash planetary reducer of claim 2, wherein, The output shaft (31) is sleeved with a second deep groove ball bearing (7).
6. The robot-specific low-backlash planetary reducer of claim 2, wherein, The planetary gear (33) is arranged on a gear mounting groove of the transmission assembly (32), and the number of the planetary gears (33) is not less than three.