A lightweight speed reducer
By tightly assembling the module housing, planetary carrier, and internal gear ring, and designing a weight-reducing groove, the problems of large reducer weight and poor reduction ratio were solved, achieving the effects of lightweight and high reduction ratio.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGYANG CITY DONGZHENG MOTOR
- Filing Date
- 2025-08-13
- Publication Date
- 2026-07-03
AI Technical Summary
Existing reducers are large in size and have poor reduction ratios, which affects the use of robot joints and results in low market acceptance.
It adopts a modular housing, a first planetary carrier and a second planetary carrier design, and combines the tight assembly of internal gear ring, planetary gears and bearings. The weight is reduced by setting weight reduction grooves, and high torque is transmitted with a high reduction ratio.
The reducer has been made lightweight, reducing its weight and increasing the reduction ratio to meet the usage requirements of robot joints.
Smart Images
Figure CN224453595U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of speed reducer technology, specifically to a lightweight speed reducer. Background Technology
[0002] A speed reducer is a device used in mechanical transmission systems to reduce the output speed of a motor or engine while increasing the output torque. It achieves speed and torque conversion through a combination of transmission components such as gears and worm gears, and is widely used in industry, transportation, robotics, and other fields.
[0003] Currently, reducers have a simple structure, are heavy, and have poor reduction ratios, which affects their use at robot joints and prevents them from gaining market acceptance. Summary of the Invention
[0004] The technical problem to be solved by this utility model is to provide a lightweight reducer that reduces its weight and has the effect of transmitting high torque with a high reduction ratio, so as to solve the problems mentioned in the background art.
[0005] This utility model is achieved through the following technical solution: a lightweight reducer, including a module housing, a first planetary carrier, and a second planetary carrier. The second planetary carrier is disposed in an opening at one end of the module housing. An internal gear ring is provided at one end of the second planetary carrier, and a base plate is provided at the end of the internal gear ring away from the second planetary carrier. The internal gear ring and the base plate are fixed to the module housing by bolts. The first planetary carrier is disposed inside the internal gear ring. A plurality of first planetary gears that mesh with the internal gear ring are movably mounted on the first planetary carrier. A plurality of second planetary gears that mesh with the internal gear ring are movably mounted on the second planetary carrier. A motor gear shaft that meshes with the second planetary gears is installed at the center of the first planetary carrier.
[0006] As a preferred technical solution, a planetary plate is bolted to the end of the second planetary carrier away from the internal gear ring. Multiple first bearings are installed between the second planetary carrier and the module housing. First washers are installed between the first bearings. A washer is installed between the outer ring of the first bearing closest to the internal gear ring and the internal gear ring.
[0007] As a preferred technical solution, the surface grooves of the first planetary carrier form multiple first weight-reducing grooves, multiple first shafts are installed on the first planetary carrier, and a second bearing is installed at the other end of the first shaft. The first planetary gears are all installed on the outer ring of the second bearings, and a second shim is installed between the first planetary gears and the first planetary carrier.
[0008] As a preferred technical solution, multiple second shafts are installed at one end of the second planetary carrier, and a third bearing is installed at the other end of each second shaft. The second planetary gears are all installed on the outer ring of the third bearings, and a third shim is installed between the second planetary carrier and the second planetary gears.
[0009] As a preferred technical solution, multiple second weight-reduction grooves are formed by recessing on the outer ring surface of the module housing.
[0010] As a preferred technical solution, multiple fourth bearings are installed between the end of the motor gear shaft away from the first planetary carrier and the second planetary carrier.
[0011] As a preferred technical solution, multiple locating pins are installed between the planetary plate and the second planetary carrier.
[0012] As a preferred technical solution, a portion of the outer ring of the internal gear ring is recessed inward to form a third weight-reducing groove.
[0013] The beneficial effects of this utility model are: the utility model has a simple structure, and all the first planetary gears, second planetary gears and bearings are tightly assembled together through a single internal gear ring, which increases the utilization rate and reduces the space. Furthermore, by setting the first weight reduction groove, the second weight reduction groove and the third weight reduction groove, the weight is reduced, achieving the purpose of lightweighting. Moreover, the transmission ratio can achieve the effect of transmitting high torque with a high reduction ratio. Attached Figure Description
[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0016] Figure 2 This is a bottom view of the present invention;
[0017] Figure 3 This is a schematic diagram of the structure of this utility model after the bottom plate has been removed;
[0018] Figure 4 This is a schematic diagram of the internal gear ring of this utility model;
[0019] Figure 5 This is a schematic diagram of the installation structure of the first planetary carrier, the first planetary gear, and the second planetary gear of this utility model;
[0020] Figure 6 This is a cross-sectional view of the present invention.
[0021] The components are as follows: 1. Module housing; 2. Planetary plate; 3. Base plate; 4. First planetary carrier; 5. First planetary gear; 6. Motor gear shaft; 7. First shaft; 8. Second bearing; 9. Internal gear ring; 10. First bearing; 11. Fourth bearing; 13. Second planetary gear; 14. Third bearing; 15. Second planetary carrier; 16. Second shaft; 17. Washer. Detailed Implementation
[0022] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0023] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.
[0024] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.
[0025] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, this utility model discloses a lightweight reducer, including a module housing 1, a first planetary carrier 4, and a second planetary carrier 15. The second planetary carrier 15 is disposed in an opening at one end of the module housing. An internal gear ring 9 is provided at one end of the second planetary carrier 15, and a base plate 3 is provided at the end of the internal gear ring 9 away from the second planetary carrier 15. The internal gear ring 9 and the base plate 3 are fixed to the module housing 1 by bolts. The first planetary carrier 4 is disposed inside the internal gear ring 9. Multiple first planetary gears 5 that mesh with the internal gear ring 9 are movably mounted on the first planetary carrier 4. Multiple second planetary gears 13 that mesh with the internal gear ring 9 are movably mounted on the second planetary carrier 15. A motor gear shaft 6 that meshes with the second planetary gears 13 is installed at the center of the first planetary carrier 4. In this way, all the first planetary gears, second planetary gears, and bearings are tightly assembled together through an internal gear ring, saving a lot of space.
[0026] In this embodiment, a planetary plate 2 is bolted to the end of the second planetary carrier 15 away from the internal gear ring 9. Multiple first bearings 10 are installed between the second planetary carrier 15 and the module housing 1. First washers are installed between the first bearings 10. A washer 17 is installed between the outer ring of the first bearing 10 near the internal gear ring 9 and the internal gear ring 9.
[0027] In this embodiment, the surface groove of the first planetary carrier 4 forms a plurality of first weight-reducing grooves, and a plurality of first shafts 7 are installed on the first planetary carrier 4. A second bearing 8 is installed at the other end of the first shaft 7, and the first planetary gears 5 are all installed on the outer ring of the second bearings 8. A second shim is installed between the first planetary gears 5 and the first planetary carrier 4. The weight of the first planetary carrier is reduced by the first weight-reducing grooves.
[0028] In this embodiment, a plurality of second shafts 16 are installed at one end of the second planetary carrier 15, and a third bearing 14 is installed at the other end of each of the second shafts 16. The second planetary gears 13 are all installed on the outer ring of the third bearings 14, and a third shim is installed between the second planetary carrier 15 and the second planetary gears 13.
[0029] In this embodiment, multiple second weight-reducing grooves are recessed on the outer ring surface of the module housing 1 to reduce the weight of the module housing.
[0030] In this embodiment, a plurality of fourth bearings 11 are installed between the end of the motor gear shaft 6 away from the first planetary carrier 4 and the second planetary carrier 15. The second planetary carrier can be centered and positioned by the fourth bearings and the first bearings, and the second planetary carrier can operate smoothly.
[0031] In this embodiment, multiple positioning pins are installed between the planetary plate 2 and the second planetary carrier 15 to increase the installation accuracy between the planetary plate and the second planetary carrier.
[0032] In this embodiment, a portion of the outer ring of the internal gear ring 9 is recessed inward to form a third weight-reducing groove, which reduces the weight and material usage of the internal gear ring.
[0033] Working principle: An external motor drives the rotation of the first planetary gear, which in turn drives the first planetary carrier, which in turn drives the motor gear shaft and transmits the torque to the second planetary gear. The torque is then transmitted to the second planetary carrier and the planetary plate. Each stage has a speed ratio of 6, for a total of 36 speed ratios.
[0034] The lightweight design is primarily achieved on three structural components: the first planetary carrier, the module housing, and the internal gear ring. These components are equipped with first, second, and third weight-reduction grooves to achieve the goal of lightweighting (weighing only 216 grams), which has been well-received by the market.
[0035] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope defined in the claims.
Claims
1. A lightweight reduction gear, characterized by: The system includes a module housing (1), a first planetary carrier (4), and a second planetary carrier (15). The second planetary carrier (15) is located in an opening at one end of the module housing. An internal gear ring (9) is provided at one end of the second planetary carrier (15). A base plate (3) is provided at the end of the internal gear ring (9) away from the second planetary carrier (15). The internal gear ring (9) and the base plate (3) are fixed to the module housing (1) by bolts. The first planetary carrier (4) is located inside the internal gear ring (9). Multiple first planetary gears (5) that mesh with the internal gear ring (9) are movably mounted on the first planetary carrier (4). Multiple second planetary gears (13) that mesh with the internal gear ring (9) are movably mounted on the second planetary carrier (15). A motor gear shaft (6) that meshes with the second planetary gears (13) is installed at the center of the first planetary carrier (4).
2. The lightweight reducer of claim 1, wherein: The second planetary carrier (15) has a planetary plate (2) bolted to the end away from the internal gear ring (9). Multiple first bearings (10) are installed between the second planetary carrier (15) and the module housing (1). First washers are installed between the first bearings (10). Washers (17) are installed between the outer ring of the first bearing (10) near the internal gear ring (9) and the internal gear ring (9).
3. The lightweight reducer of claim 1, wherein: The surface grooves of the first planetary carrier (4) form multiple first weight-reducing grooves. Multiple first shafts (7) are installed on the first planetary carrier (4). A second bearing (8) is installed at the other end of the first shaft (7). The first planetary gears (5) are all installed on the outer ring of the second bearing (8). A second shim is installed between the first planetary gears (5) and the first planetary carrier (4).
4. The lightweight reducer of claim 1, wherein: Multiple second shafts (16) are installed at one end of the second planetary carrier (15), and a third bearing (14) is installed at the other end of each second shaft (16). The second planetary gears (13) are all installed on the outer ring of the third bearings (14), and a third shim is installed between the second planetary carrier (15) and the second planetary gears (13).
5. The lightweight reducer of claim 1, wherein: Multiple second weight-reduction grooves are formed by recesses on the outer ring surface of the module housing (1).
6. The lightweight reducer of claim 1, wherein: Multiple fourth bearings (11) are installed between the end of the motor gear shaft (6) away from the first planetary carrier (4) and the second planetary carrier (15).
7. The lightweight reducer of claim 2, wherein: Multiple locating pins are installed between the planetary plate (2) and the second planetary carrier (15).
8. The lightweight reducer of claim 1, wherein: A portion of the outer ring of the internal gear ring (9) is recessed inward to form a third weight-reducing groove.