Double-cycloid speed reducer
By employing multiple meshing pinions and planetary gear assembly in the double cycloidal reducer, the problems of stability and easy damage to the meshing pinions are solved, achieving higher stability and reduced maintenance costs.
Patent Information
- Application Number
- CN202422858213.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-22
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-11-22
AI Technical Summary
Existing double cycloidal reducers have poor stability and unstable meshing positions, which makes the meshing small teeth prone to breakage and results in high overall replacement costs.
The solar outer gear and planetary gears are engaged by multiple meshing small teeth. The planetary gears are assembled and fixed by using the threaded connection between the inner groove and the support plate and connecting block. The threaded connection between the pin and the support plate facilitates partial replacement.
It improves stability during rotation, enhances meshing tightness, reduces maintenance costs, and simplifies the replacement process for locally damaged parts.
Smart Images
Figure CN223511427U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of speed reducer technology, and more specifically, to a double cycloidal speed reducer. Background Technology
[0002] A speed reducer is a mechanical device used to reduce rotational speed. Commonly used speed reducers include bicycloidal speed reducers. The stability of existing bicycloidal speed reducers is mainly achieved by maintaining approximately one-third of the pin teeth in constant engagement with the outer circumference of the vane wheel during eccentric rotation. However, the pin teeth are cylindrical and relatively large, thus limiting their number due to space constraints, and the stability of the engagement position is poor. Therefore, we propose a bicycloidal speed reducer. Utility Model Content
[0003] The purpose of this invention is to overcome the shortcomings of the existing technology, adapt to practical needs, and provide a double cycloidal reducer to solve the technical problem of poor stability during the current deceleration process.
[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a double cycloidal reducer, including a sun outer wheel, an eccentric shell is provided on one side of the sun outer wheel, an eccentric shaft is provided at the center of the eccentric shell, a cycloidal disk is connected to the outer periphery of the eccentric shell, a planetary gear is provided on one side of the cycloidal disk, the outer periphery of the planetary gear and the inner ring of the sun outer wheel are provided with multiple meshing small teeth, multiple fixing pins are installed on the side of the planetary gear near the cycloidal disk, multiple pin cavities for constraining the fixing pins are opened on the outer edge of the cycloidal disk, the planetary gear is assembled from a central part and multiple component blocks, and a fixing structure is provided on one side of the planetary gear.
[0005] Preferably, the eccentric shell has a multi-layered hollow shell structure with increasing diameter, and a stabilizing sleeve with a stable rotation axis is provided inside the eccentric shell.
[0006] Preferably, the plurality of pin cavities are located at the same position as the plurality of fixed pins, and the fixed pins are located in the inner peripheral region of the pin cavities.
[0007] Preferably, a fixing ring is installed on the outer periphery of the eccentric shell, and one side of the fixing ring is fixed to the end of the fixing pin.
[0008] Preferably, the fixing structure includes an inner groove formed on the planetary gear, two support plates are provided on the inner circumference of the inner groove, a connecting block is rotatably connected between the ends of the two support plates, and the connecting block is connected to the inner arc side of the component block.
[0009] Preferably, the two connecting blocks have an arc-shaped structure, and their inner circumference is circular when fully extended. The inner circumference of the two connecting blocks is threaded with a pin, and the end of the pin has a pointed conical structure.
[0010] Compared with the prior art, the beneficial effects of this utility model are:
[0011] 1. This utility model adopts multiple meshing small teeth between the sun outer wheel and the planetary wheel, which can be more limited during rotation, making it more stable during rotation. Moreover, the multi-meshing design has a higher meshing tightness compared with needle-tooth column, further improving the stability effect and solving the problem of poor stability during deceleration.
[0012] 2. This utility model is also assembled using planetary gears, and through the matching design of the inner groove, support plate and connecting block, it can produce a limiting and fixing effect. Furthermore, through the threaded design of the inner arc of the support plate and the threaded design of the pin, it can achieve a fixing effect again, making it easy to replace the damaged parts. The fixing effect is excellent, which further solves the problem that the meshing small teeth are small and easy to break, resulting in the need for whole replacement and high replacement cost. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of this utility model;
[0014] Figure 2 This is a schematic diagram of the structure when the eccentric shell is split in this utility model;
[0015] Figure 3 This is a diagram illustrating the eccentric state in this utility model;
[0016] Figure 4 This is a schematic diagram of the structure in the disassembled state of this utility model;
[0017] Figure 5 This is a diagram showing the disassembled planetary gear in this utility model;
[0018] Figure 6 This is a schematic diagram of the fixing structure in this utility model.
[0019] The labels in the diagram are as follows: 1. Sun outer wheel; 2. Eccentric shell; 3. Eccentric shaft; 4. Cycloidal disk; 5. Planetary gears; 6. Fixing pin; 7. Pin cavity; 8. Fixing structure; 9. Stabilizing sleeve; 10. Fixing ring;
[0020] 501. Central part; 502. Component block;
[0021] 801. Inner slot; 802. Support plate; 803. Connecting block; 804. Pin. Detailed Implementation
[0022] like Figures 1 to 6As shown, this utility model relates to a double cycloidal reducer, including an eccentric shell 2 and a sun outer wheel 1. The sun outer wheel 1 is disposed on one side of the eccentric shell 2. The eccentric shell 2 has a multi-layer hollow shell structure with increasing diameter. An eccentric shaft 3 is disposed at the center of the eccentric shell 2. A stabilizing sleeve 9 for stabilizing the rotating shaft is disposed inside the eccentric shell 2. A cycloidal disk 4 is connected to the outer periphery of the eccentric shell 2. A planetary gear 5 is disposed on one side of the cycloidal disk 4. Multiple fixing pins 6 are installed on the side of the planetary gear 5 near the cycloidal disk 4. Multiple pin cavities 7 for constraining the fixing pins 6 are opened on the outer edge of the cycloidal disk 4. The multiple pin cavities 7 are in the same position as the multiple fixing pins 6. The fixing pins 6 are located in the inner periphery of the pin cavities 7. A fixing ring 10 is installed on the outer periphery of the eccentric shell 2. One side of the fixing ring 10 is fixed to the end of the fixing pin 6. Multiple meshing small teeth are provided on the outer periphery of the planetary gear 5 and the inner ring of the sun outer wheel 1.
[0023] By replacing the needle-tooth column with multiple meshing small teeth, it can increase the meshing contact area and has a higher meshing tightness compared to the needle-tooth column, thus further improving the stability.
[0024] In the embodiments of this utility model, since the meshing teeth are small, they may be prone to damage after long-term operation. If the whole thing is replaced, it will be wasteful and costly. To address this, the planetary gear 5 adopts a modular design. The planetary gear 5 is composed of a central part 501 and multiple component blocks 502. The modular design allows for maintenance by replacing one module. For stable installation, a fixing structure 8 is provided on one side of the planetary gear 5. The fixing structure 8 includes an inner groove 801 on the planetary gear 5. Two support plates 802 are provided on the inner circumference of the inner groove 801. A connecting block 803 is rotatably connected between the ends of the two support plates 802. The connecting block 803 is connected to the inner arc side of the component block 502. The two connecting blocks 803 are arc-shaped. When the two connecting blocks 803 are fully opened, their inner circumference is circular. A pin 804 is threadedly connected to the inner circumference of the two connecting blocks 803. The end of the pin 804 is a pointed cone structure.
[0025] Working principle: When fixed, the two support plates 802 are bent and inserted into the inner slot 801. The pin 804 is then inserted. During the insertion process, the pointed tip of the pin 804 gradually pushes open the two support plates 802, causing their inner circumference to open into a circle. Then, the pin 804 is rotated using a tool, which allows the pin 804 to be threadedly connected to the inner arc of the two support plates 802. Thus, a stable connection is achieved through the opening of the two support plates 802, the limiting position of the inner slot 801, and the threaded connection. Therefore, maintenance can be performed by simply replacing the component block 502 of the crushing tooth part, further reducing maintenance costs.
[0026] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.
Claims
1. A double cycloidal reducer, characterized in that, The device includes a solar outer ring (1), an eccentric shell (2) on one side of the solar outer ring (1), an eccentric shaft (3) at the center of the eccentric shell (2), a cycloidal disk (4) connected to the outer periphery of the eccentric shell (2), a planetary gear (5) on one side of the cycloidal disk (4), multiple meshing small teeth on the outer periphery of the planetary gear (5) and the inner ring of the solar outer ring (1), multiple fixing pins (6) installed on the side of the planetary gear (5) near the cycloidal disk (4), and multiple pin cavities (7) for the fixing pins (6) opened on the outer edge of the cycloidal disk (4). The planetary gear (5) is assembled from a central part (501) and multiple component blocks (502), and a fixing structure (8) is provided on one side of the planetary gear (5).
2. The double cycloidal reducer according to claim 1, characterized in that, The eccentric shell (2) has a multi-layered hollow shell structure with increasing diameter, and a stabilizing sleeve (9) with a stable rotation axis is provided inside the eccentric shell (2).
3. A double cycloidal reducer according to claim 2, characterized in that, The multiple pin cavities (7) are in the same position as the multiple fixing pins (6), and the fixing pins (6) are located in the inner peripheral region of the pin cavity (7).
4. A double cycloidal reducer according to claim 3, characterized in that, A fixing ring (10) is installed on the outer periphery of the eccentric shell (2), and one side of the fixing ring (10) is fixed to the end of the fixing pin (6).
5. A double cycloidal reducer according to claim 4, characterized in that, The fixing structure (8) includes an inner groove (801) opened on the planetary gear (5). Two support plates (802) are provided on the inner periphery of the inner groove (801). A connecting block (803) is rotatably connected between the ends of the two support plates (802). The connecting block (803) is connected to the inner arc side of the component block (502).
6. A double cycloidal reducer according to claim 5, characterized in that, The two connecting blocks (803) are arc-shaped structures. When the two connecting blocks (803) are fully opened, their inner circumferences are circular. The inner circumferences of the two connecting blocks (803) are threaded with pins (804), and the ends of the pins (804) are pointed cone structures.