Lightweight sealing deceleration structure
The lightweight sealed deceleration structure addresses bearing wear and contamination issues by using a polymer output bracket with dual seals, ensuring efficient operation and reduced weight and size.
Patent Information
- Application Number
- CN202411314205.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2024-12-27
AI Technical Summary
Existing motor deceleration structures face issues with bearing wear, oil leakage, and contamination due to external dust or water vapor, leading to reduced service life and increased weight and size.
A lightweight sealed deceleration structure using a polymer output bracket with rolling bearings and dual seals, along with a motor seat and inner gear ring, to minimize friction and prevent contamination while reducing weight and volume.
The structure ensures efficient operation, extends service life, and maintains sealing effectiveness while being lightweight and cost-effective.
Smart Images
Figure CN119210022A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of motor deceleration, and in particular to a lightweight sealed deceleration structure. Background Art
[0002] In order to reduce the speed or increase the output torque, existing motors use gears for speed conversion and adjustment. In order to reduce the friction between the gears or the rotating output shaft and the fixed structure, oil-containing bearings or ball bearings are used at the output end to make clearance fit with the output shaft. However, with long-term use, the bearings will wear, causing the bearing clearance to become larger and larger, the lubricating oil inside will seep out, and external dust or water vapor will enter and stick together, causing the transmission function between the gears to be lost, and at the same time affecting the service life of the reduction structure. In order to solve the problem of oil leakage, existing designers will seal the outside of the gears, resulting in a large overall size and heavy weight of the reduction structure. Summary of the invention
[0003] In order to reduce the sealing components of the deceleration structure, reduce the weight of the deceleration structure, reduce the volume of the deceleration structure, and ensure the sealing effect of the deceleration structure, the present application provides a lightweight sealed deceleration structure.
[0004] The present application provides a lightweight sealed deceleration structure, which adopts the following technical solution:
[0005] A lightweight sealed reduction structure includes a motor gear arranged at the output end of the motor, an inner gear ring of the motor, a planetary gear set arranged in the inner gear ring of the motor and matched with the motor gear, and a planetary carrier matched with the planetary gear set, and also includes an output bracket matched with the planetary carrier and a motor seat for positioning the output bracket, the output bracket is provided with a seal, the output bracket is provided with a rolling bearing, the rolling bearing is located between the seal and the planetary carrier, and the output bracket is made of a polymer material.
[0006] By adopting the above technical solution, when the output bracket and the motor base perform relative motion, the rolling bearing ensures the normal operation of the output bracket and reduces the friction between the output bracket and the motor base. The seal is used to seal the gap between the output bracket and the motor base to reduce the possibility of external dust and other impurities entering and contaminating the interior of the reduction structure. The output bracket is made of polymer material with good wear resistance and light weight. The seal effectively reduces the number of components for external sealing of the reduction structure. The reduction structure of the present application has a light overall weight and good sealing. The motor base and the output bracket cooperate to ensure the operation effect of the reduction structure and extend the service life of the reduction structure.
[0007] Preferably, the sealing member comprises a sealing ring 1 and a sealing ring 2 which are arranged on the output bracket, and a mounting groove for mounting the sealing member is formed on the side wall of the output bracket along the circumferential direction.
[0008] By adopting the above technical solution, the sealing ring 1 and the sealing ring 2 form a double seal between the output bracket and the motor base, which has low cost, good reliability and light weight of the sealing structure.
[0009] Preferably, a side wall of the output bracket is provided with a boss located between the seal and the rolling bearing along the circumferential direction.
[0010] By adopting the above technical solution, the boss is used to position the rolling bearing and improve the stability of the output bracket on the motor seat.
[0011] Preferably, the motor seat includes a connecting part connected to the inner gear ring of the motor and a positioning part arranged at one end of the connecting part away from the inner gear ring of the motor, the inner diameter of the positioning part is smaller than the inner diameter of the connecting part, the boss is located in the connecting part and the outer diameter of the boss is larger than the inner diameter of the positioning part.
[0012] By adopting the above technical solution, the connecting part is used to fit tightly against the inner gear ring of the motor to ensure the connection stability between the various components, and the positioning part is used to position the end of the output bracket to improve the stability of the output bracket and the seal.
[0013] Preferably, a protrusion is provided on the inner wall of the connecting portion along the circumferential direction toward the boss, and a positioning space for positioning the rolling bearing is formed between the boss and the protrusion.
[0014] By adopting the above technical solution, the protrusion and the boss cooperate to position the rolling bearing, thereby improving the stability of the rolling bearing and facilitating the rotation of the rolling bearing in cooperation with the output bracket.
[0015] Preferably, the output bracket is a polymer material processed by injection molding.
[0016] By adopting the above technical solution, the output bracket is an injection moldable polymer material, which is lower in cost and lighter in weight than metal processing materials.
[0017] Preferably, a motor fixing seat is provided at one end of the motor inner gear ring away from the motor seat, the end face of one end of the motor fixing seat is in close contact with the end face of the motor, the end face of the other end of the motor fixing seat is in close contact with the end face of one end of the motor inner gear ring, the end face of the other end of the motor inner gear ring is in close contact with the end face of one end of the motor seat, and a cover hole plate is provided on the end face of the other end of the motor seat.
[0018] By adopting the above technical solution, the motor fixing seat provides support for the inner gear ring of the motor, improves the stability of the inner gear ring of the motor, and facilitates the motor driving. The motor fixing seat, the inner gear ring of the motor and the motor seat fit tightly together, which is convenient for subsequent fixation.
[0019] Preferably, the motor base is made of polymer material.
[0020] In summary, the present application uses an output bracket and a motor seat made of polymer materials, thereby ensuring the operating efficiency of the deceleration structure, reducing the weight of the deceleration structure, reducing the volume of the deceleration structure, and reducing the processing cost of the deceleration structure and the production of sealing components; the seal improves the sealing of the deceleration structure and blocks external impurities. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 This is a schematic diagram of a lightweight sealed deceleration structure of the present application. Figure 1 ;
[0022] Figure 2 This is a cross-sectional view of a lightweight sealed deceleration structure of the present application Figure 1 ;
[0023] Figure 3 This is a schematic diagram of a lightweight sealed deceleration structure of the present application. Figure 2 ;
[0024] Figure 4 This is a cross-sectional view of a lightweight sealed deceleration structure of the present application Figure 2 .
[0025] Explanation of the accompanying drawings: 1. Motor gear; 2. Motor inner gear ring; 3. Planetary gear set; 4. Planetary carrier; 5. Output bracket; 6. Motor seat; 61. Connecting part; 62. Positioning part; 7. Seal; 71. Seal ring 1; 72. Seal ring 2; 8. Rolling bearing; 9. Mounting groove; 10. Boss; 11. Protrusion; 12. Motor fixing seat; 13. Cover plate. DETAILED DESCRIPTION
[0026] The following is combined with Figure 1-Figure 4 This application is described in further detail.
[0027] The present application embodiment discloses a lightweight sealed deceleration structure. Figure 1 and Figure 2 , including a motor gear 1 fixedly mounted on the output end of the motor, a planetary gear set 3 matched with the motor gear 1, a planetary carrier 4 located at the end of the planetary gear set 3 away from the motor, and an output bracket 5 matched with the planetary carrier 4, and also including a motor fixing seat 12 installed on the motor, a motor inner gear ring 2 located at the end of the motor fixing seat 12 away from the motor, and a motor seat 6 arranged at the end of the motor inner gear ring 2 away from the motor fixing seat 12, the motor inner gear ring 2 cooperates with the planetary gear set 3, and the motor seat 6, the motor inner gear ring 2 and the motor fixing seat 12 are all provided with fixing holes along the length direction of the motor rotating shaft, so as to facilitate the subsequent use of fixing parts such as bolts to fix the motor seat 6, the motor inner gear ring 2 and the motor fixing seat 12.
[0028] Reference Figure 2 and Figure 3The motor seat 6 is used to position the output bracket 5. In order to reduce the friction between the output bracket 5 and the motor seat 6 and facilitate the rotation of the output bracket 5, a rolling bearing 8 is sleeved on the outer wall of the output bracket 5. The inner ring of the rolling bearing 8 is tightly matched with the output bracket 5, and the outer ring of the rolling bearing 8 is tightly matched with the motor seat 6. In order to reduce the leakage of internal lubricating oil after the rolling bearing 8 is worn for a long time and pollute the end of the output bracket 5, a seal 7 is provided on the output bracket 5. The seal 7 seals the path connecting the rolling bearing 8 with the external environment. At the same time, the seal 7 seals the gap between the output bracket 5 and the motor seat 6, reducing the pollution of the internal structure of the reduction structure by external impurities, ensuring the normal operation of the reduction structure, and extending the service life of the reduction structure.
[0029] Reference Figure 2 and Figure 4 The sealing member 7 includes a sealing ring 1 71 and a sealing ring 2 72 sleeved on the output bracket 5. The side wall of the output bracket 5 is provided with a mounting groove 9 for positioning the sealing ring 1 71 or the sealing ring 2 72 along the circumferential direction. The mounting groove 9 is provided with two groups in the embodiment of the present application. In the specific implementation process, the number of sealing rings can be set in multiple groups according to the operation mode of the deceleration structure. The mounting groove 9 improves the stability of the sealing ring 1 71 and the sealing ring 2 72 on the output bracket 5. The sealing ring 1 71 and the sealing ring 2 72 form a double seal, thereby improving the sealing effect of the deceleration structure.
[0030] Reference Figure 2 and Figure 4 In order to improve the stability of the output bracket 5 and the stability between the rolling bearing 8 during the rotation of the output bracket 5, the outer wall of the output bracket 5 is provided with a boss 10 along the circumferential direction, and the boss 10 is located between the seal 7 and the rolling bearing 8. The motor seat 6 includes a connecting portion 61 connected to the motor inner gear ring 2 and a positioning portion 62 located at one end of the connecting portion 61 away from the motor inner gear ring 2. The inner diameter of the positioning portion 62 is smaller than the inner diameter of the connecting portion 61. The boss 10 is located in the connecting portion 61 and the outer diameter of the boss 10 is larger than the inner diameter of the positioning portion 62, thereby improving the stability of the output bracket 5 on the motor seat 6. The inner wall of the connecting portion 61 is provided with a protrusion 11 along the circumferential direction toward the boss 10. A positioning space for positioning the rolling bearing 8 is formed between the protrusion 11 and the boss 10, thereby improving the stability of the rolling bearing 8.
[0031] Reference Figure 2 and Figure 3 In order to shield the motor base 6, the motor inner gear ring 2 and the fixing holes of the motor fixing base 12, a cover plate 13 is provided on one end of the motor base 6 away from the motor inner gear ring 2, and a hole for the positioning part 62 to pass through is provided on the cover plate 13. The motor base 6 is provided with a connecting ear seat for connecting the cover plate 13 to improve the stability of the cover plate 13 on the motor base 6.
[0032] Reference Figure 4 The end face of one end of the motor fixing seat 12 is in close contact with the end face of the motor, the end face of the other end of the motor fixing seat 12 is in close contact with the end face of one end of the motor inner gear ring 2, and the end face of the other end of the motor inner gear ring 2 is in close contact with the end face of one end of the motor seat 6, so that when the fixing piece fixes the motor fixing seat 12, the motor inner gear ring 2 and the motor seat 6 together, the connection sealing between the various components is convenient.
[0033] Reference Figure 4 The output bracket 5 is made of polymer material, and the motor base 6 is made of polymer material, which is used to reduce the overall weight of the deceleration structure and reduce the size of the device. The output bracket 5 is an injection moldable polymer material. In the embodiment of the present application, the polymer material is made of polyketone and glass fiber reinforced material by injection molding. Compared with the metal processing method in the prior art, this method has lower cost, is more lightweight and integrated.
[0034] The sealing ring 1 71 and the sealing ring 2 72 of the present application play a dynamic sealing role for the output bracket 5 and the motor base 6; the output bracket 5 is made of injection-molded polymer material, which effectively saves costs, reduces the structure volume, and ensures the operation effect of the deceleration structure.
[0035] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A lightweight sealed speed reduction structure, comprising a motor gear (1) arranged at the output end of a motor, an inner gear ring (2) of the motor, a planetary gear set (3) arranged in the inner gear ring (2) of the motor and matched with the motor gear (1), and a planetary carrier (4) matched with the planetary gear set (3), characterized in that: The invention also comprises an output bracket (5) matched with the planetary bracket (4) and a motor seat (6) for positioning the output bracket (5); a sealing member (7) is provided on the output bracket (5); a rolling bearing (8) is provided on the output bracket (5); the rolling bearing (8) is located between the sealing member (7) and the planetary bracket (4); and the output bracket (5) is made of a polymer material.
2. A lightweight sealed deceleration structure according to claim 1, characterized in that: The sealing member (7) comprises a sealing ring 1 (71) and a sealing ring 2 (72) arranged on the output bracket (5); a mounting groove (9) for mounting the sealing member (7) is provided on the side wall of the output bracket (5) along the circumferential direction.
3. A lightweight sealed deceleration structure according to claim 1, characterized in that: The side wall of the output bracket (5) is provided with a boss (10) located between the sealing element (7) and the rolling bearing (8) along the circumferential direction.
4. A lightweight sealed deceleration structure according to claim 3, characterized in that: The motor seat (6) comprises a connecting portion (61) connected to the motor inner gear ring (2) and a positioning portion (62) arranged at one end of the connecting portion (61) away from the motor inner gear ring (2), the inner diameter of the positioning portion (62) is smaller than the inner diameter of the connecting portion (61), the boss (10) is located in the connecting portion (61) and the outer diameter of the boss (10) is larger than the inner diameter of the positioning portion (62).
5. A lightweight sealed deceleration structure according to claim 4, characterized in that: The inner wall of the connecting portion (61) is provided with a protrusion (11) along the circumferential direction toward the boss (10), and a positioning space for positioning the rolling bearing (8) is formed between the boss (10) and the protrusion (11).
6. A lightweight sealed deceleration structure according to claim 1, characterized in that: The output bracket (5) is a polymer material processed by injection molding.
7. A lightweight sealed deceleration structure according to claim 1, characterized in that: A motor fixing seat (12) is provided at one end of the motor inner gear ring (2) away from the motor seat (6); the end surface of one end of the motor fixing seat (12) is in close contact with the end surface of the motor; the end surface of the other end of the motor fixing seat (12) is in close contact with the end surface of one end of the motor inner gear ring (2); the end surface of the other end of the motor inner gear ring (2) is in close contact with the end surface of one end of the motor seat (6); and a cover hole plate (13) is provided at the end surface of the other end of the motor seat (6).
8. The lightweight sealed deceleration structure according to claim 1, characterized in that: The motor base (6) is made of polymer material.