Rotating shaft movable supporting mechanism for servo motor
The shaft support mechanism for servo motors addresses the instability and friction issues by providing a stable, simplified assembly process that prevents radial movement and enhances motor longevity.
Patent Information
- Application Number
- CN202422209706.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-10
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-09-10
AI Technical Summary
The rotor shaft of the existing servo motor is complex and unstable, causing radial movement, causing friction between the frame and the inner wall of the case, and shortening the motor life.
A rotating shaft movable support mechanism is designed, by providing a boss and bearing groove on the casing and end cover, combining the bearing socket and limit gear ring to ensure a stable connection and movable space of the rotating shaft to avoid radial movement.
It realizes accurate connection and stable operation of the rotating shaft, improves the assembly efficiency and stability of the motor, avoids friction between the rotating shaft and the inner wall of the casing, and extends the motor life.
Smart Images
Figure CN223109782U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of servo motors, in particular to a rotating shaft movable support mechanism for a servo motor. Background Art
[0002] A servo motor is an engine that controls the operation of mechanical components in a servo system. It is an auxiliary motor indirect speed change device that can convert voltage signals into torque and speed to drive a control object, and has the characteristics of high-precision speed and position control. Its working principle is that its rotor speed is controlled by an input signal and can respond quickly. In an automatic control system, the servo motor is used as an actuator, with characteristics such as a small electromechanical time constant, high linearity, and starting voltage, and can convert the received electrical signal into an angular displacement or angular velocity output on the motor shaft. It is widely used in automation equipment that requires precise positioning, high-speed movement, high torque output, high stability, and low noise, such as numerical control machine tools, semiconductor manufacturing fields, imaging equipment, packaging equipment, and the robotics field, etc.
[0003] As a type of servo motor, there is a shaft servo motor, which is an important part of a servo system and is responsible for driving mechanical components to operate according to precise control instructions. It can perform electromechanical energy conversion and signal conversion and is a key device for achieving precise motion control. The rotor, as its rotating part of the motion, is mainly composed of a rotating shaft, a rotor core, a skeleton, etc. During the motor assembly process, it is necessary to accurately and movably connect the rotor to the motor housing. However, the existing connection method between the rotating shaft of the rotor and the housing is relatively complex and cannot ensure the stability of the rotating shaft during operation, resulting in a problem of radial movement. Furthermore, it will cause the skeleton to rub against the inner wall of the housing, leading to a reduction in the lifespan of the motor.
[0004] Therefore, there is an urgent need for a new technical solution to solve the above technical problems. Summary of the Utility Model
[0005] The purpose of the present utility model is to overcome the problems of the above-mentioned existing technologies, and provides a rotating shaft movable support mechanism for a servo motor to solve the technical problems that the existing connection method between the rotating shaft of a traditional rotor and the housing is relatively complex, cannot ensure the stability of the rotating shaft during operation, has a problem of radial movement, and will further cause the skeleton to rub against the inner wall of the housing, resulting in a reduction in the lifespan of the motor.
[0006] The above purpose is achieved by the following technical solutions:
[0007] A rotating shaft movable support mechanism for a servo motor, comprising a machine shell and a rear end cover that can be connected to each other. The machine shell includes a machine shell cylinder body and a front end cover that are connected to each other. A first through hole for the rotating shaft is provided at the axial center position of the front end cover, and a second through hole for the rotating shaft is provided at the axial center position of the rear end cover. A first boss is provided on the inner wall of the front end cover, and a first bearing embedding groove that can communicate with the first through hole for the rotating shaft is provided at the axial center position of the first boss. A second boss is provided on the inner wall of the rear end cover, and a second bearing embedding groove that can communicate with the second through hole for the rotating shaft is provided at the axial center position of the second boss. A first bearing is embedded in the first bearing embedding groove, and a second bearing is embedded in the second bearing embedding groove. A first bearing socket part, a rotor core installation part, and a second bearing socket part are sequentially arranged on the outer wall of the rotating shaft. The first bearing socket part is sleeved with the inner ring of the first bearing, and the second bearing socket part is sleeved with the inner ring of the second bearing.
[0008] Further, a skeleton ring groove for the two ends of the skeleton to move is formed between the outer wall of the first boss and the inner wall of the machine shell cylinder body, and between the outer wall of the second boss and the inner wall of the machine shell cylinder body.
[0009] Further, an oil seal socket part is further provided on the outer side of the first bearing socket part, and an oil seal is arranged between the oil seal socket part and the inner wall of the first through hole for the rotating shaft.
[0010] Further, a limit retaining ring is arranged between the first bearing socket part and the rotor core installation part.
[0011] Further, the outer diameter of the first bearing socket part is larger than the outer diameter of the rotor core installation part, and the outer diameter of the rotor core installation part is larger than the outer diameter of the second bearing socket part.
[0012] Further, the inner diameter of the first through hole for the rotating shaft is smaller than the inner diameter of the first bearing embedding groove, and the inner diameter of the second through hole for the rotating shaft is smaller than the inner diameter of the second bearing embedding groove.
[0013] Further, a first flange that can extend into the inner side of the machine shell and a second flange that can act on the port of the machine shell are provided on the side wall of the rear end cover.
[0014] Further, a sealing ring groove is further provided between the first flange and the second flange, and a sealing ring is arranged in the sealing ring groove.
[0015] Further, the machine shell cylinder body and the front end cover are integrally formed.
[0016] Further, both the machine shell and the rear end cover are made of corrosion-resistant metal materials.
[0017] The rotating shaft movable support mechanism for a servo motor provided by the present utility model pre-sets a bearing socket portion and a rotor core mounting portion on the rotating shaft, and corresponding embedding grooves are provided on the machine shell and the end cover. Thus, while ensuring the precise connection of the rotating shaft, the problem of radial movement of the rotating shaft during operation can be avoided. This mechanism not only has a simple structure and is easy to process, but also can improve the assembly efficiency of the motor, and has high precision, ensuring the stable operation of the motor. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 FIG. 6 is a schematic structural view of the rotating shaft movable support mechanism for a servo motor according to the present utility model from a first perspective;
[0019] Figure 2 FIG. 10 is a schematic structural view of the rotating shaft movable support mechanism for a servo motor according to the present utility model from a second perspective;
[0020] Figure 3 FIG. 14 is a sectional view of the rotating shaft movable support mechanism for a servo motor according to the present utility model;
[0021] Figure 4 FIG. 18 is an exploded view of the rotating shaft movable support mechanism for a servo motor according to the present utility model;
[0022] Figure 5 FIG. 22 is a schematic structural view of the rotating shaft in the rotating shaft movable support mechanism for a servo motor according to the present utility model.
[0023] Reference Signs:
[0024] 1 - Machine shell, 101 - Machine shell cylinder, 102 - Front end cover, 103 - First boss, 104 - First through hole for rotating shaft, 105 - First bearing embedding groove;
[0025] 2 - Rear end cover, 201 - Second through hole for rotating shaft, 202 - Second boss, 203 - First flange, 204 - Second flange, 205 - Seal ring groove, 206 - Second bearing embedding groove;
[0026] 3 - Rotating shaft, 301 - First bearing socket portion, 302 - Rotor core mounting portion, 303 - Second bearing socket portion, 304 - Oil seal socket portion, 305 - Limit retaining ring;
[0027] 4 - First bearing;
[0028] 5 - Second bearing;
[0029] 6 - Skeleton ring groove;
[0030] 7 - Oil seal;
[0031] 8 - Skeleton. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0032] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. The described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative work belong to the protection scope of the present utility model.
[0033] As Figures 1 to 3 shown, a rotating shaft movable support mechanism for a servo motor includes a housing 1 and a rear end cover 2 that can be connected to each other. After the housing 1 and the rear end cover 2 are connected to each other, an installation cavity is formed. It is characterized in that: the housing 1 includes a housing cylinder 101 and a front end cover 102 that are connected to each other. A first through hole 104 for the rotating shaft is opened at the axial center position of the front end cover 102, and a second through hole 201 for the rotating shaft is opened at the axial center position of the rear end cover 2; a first boss 103 is provided on the inner wall of the front end cover 102, and a first bearing embedding groove 105 that can communicate with the first through hole 104 for the rotating shaft is opened at the axial center position of the first boss 103; a second boss 202 is provided on the inner wall of the rear end cover 2, and a second bearing embedding groove 206 that can communicate with the second through hole 201 for the rotating shaft is opened at the axial center position of the second boss 202;
[0034] A first bearing 4 is embedded in the first bearing embedding groove 105, and a second bearing 5 is embedded in the second bearing embedding groove 206;
[0035] A first bearing socket part 301, a rotor core installation part 302, and a second bearing socket part 303 are sequentially arranged on the outer wall of the rotating shaft 3. The first bearing socket part 301 is sleeved with the inner ring of the first bearing 4, and the second bearing socket part 303 is sleeved with the inner ring of the second bearing 5.
[0036] It should be noted that in this embodiment, the housing cylinder 101 and the front end cover 102 are integrally formed to form the housing 1, and processing methods such as integral casting, 3D printing, and stamping forming can be adopted.
[0037] Both the housing 1 and the rear end cover 2 are made of corrosion-resistant metal materials, such as aluminum alloy.
[0038] As Figure 3 shown, a skeleton ring groove 6 for both ends of the skeleton 8 to move is formed between the outer wall of the first boss 103 and the inner wall of the housing cylinder 101, and between the outer wall of the second boss 202 and the inner wall of the housing cylinder 101.
[0039] Through this structure, an installation cavity with an I-shaped cross-section can be formed in the housing 1, so as to provide a sufficient large moving space for the skeleton 8 arranged outside the rotor core 9, and can perform moving limit on both ends of the skeleton 8.
[0040] As shown Figure 5 in the figure, an oil seal socket portion 304 is further provided outside the first bearing socket portion 301, and an oil seal 7 is disposed between the oil seal socket portion 304 and the inner wall of the first through hole 104 of the rotating shaft, thereby providing a sealed space for the inner cavity of the housing 1.
[0041] As an optimization of this solution, a limit retaining ring 305 is provided between the first bearing socket portion 301 and the rotor core mounting portion 302. Under the action of the limit retaining ring 305, a stable interval can be ensured between the rotor core mounting portion 302 and the first bearing socket portion 301, and thus it can be ensured that the rotor core 9 will not collide with the inner wall of the housing 1 during subsequent operation.
[0042] As a further optimization of this solution, the outer diameter of the first bearing socket portion 301 is greater than the outer diameter of the rotor core mounting portion 302, and the outer diameter of the rotor core mounting portion 302 is greater than the outer diameter of the second bearing socket portion 303.
[0043] The inner diameter of the first through hole 104 of the rotating shaft is smaller than the inner diameter of the first bearing groove 105, and the inner diameter of the second through hole 201 of the rotating shaft is smaller than the inner diameter of the second bearing groove 206. Through the above structural limitations, it can be ensured that the rotating shaft 3 will not move radially during operation after being assembled in the housing 1 and the rear end cover 2.
[0044] As shown Figure 3 and Figure 4 in the figure, a first flange 203 that can extend into the inner side of the housing 1 and a second flange 204 that can act on the port of the housing 1 are provided on the side wall of the rear end cover 2. The first flange 203 extends into the housing 1 and fits with the inner wall of the housing 1, and the second flange 204 contacts the port of the housing 1, thereby realizing the sealed connection between the rear end cover 2 and the housing 1.
[0045] A seal ring groove 205 is further provided between the first flange 203 and the second flange 204, and a sealing ring is provided in the seal ring groove 205 to further seal the inside of the housing 1.
[0046] The above is only to illustrate the embodiments of the present invention and is not intended to limit the present invention. For those skilled in the art, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. A rotating shaft movable support mechanism for a servo motor, characterized in that: It includes a casing (1) and a rear end cover (2) that can be connected to each other. The casing (1) includes a casing cylinder body (101) and a front end cover (102) that are connected to each other. A first through hole for the rotating shaft (104) is provided at the axial center position of the front end cover (102), and a second through hole for the rotating shaft (201) is provided at the axial center position of the rear end cover (2); a first boss (103) is provided on the inner wall of the front end cover (102), and a first bearing embedding groove (105) that can communicate with the first through hole for the rotating shaft (104) is provided at the axial center position of the first boss (103); a second boss (202) is provided on the inner wall of the rear end cover (2), and a second bearing embedding groove (206) that can communicate with the second through hole for the rotating shaft (201) is provided at the axial center position of the second boss (202); A first bearing (4) is embedded in the first bearing embedding groove (105), and a second bearing (5) is embedded in the second bearing embedding groove (206); A first bearing socket part (301), a rotor core installation part (302), and a second bearing socket part (303) are sequentially arranged on the outer wall of the rotating shaft (3). The first bearing socket part (301) is sleeved with the inner ring of the first bearing (4), and the second bearing socket part (303) is sleeved with the inner ring of the second bearing (5).
2. The rotating shaft movable support mechanism for a servo motor according to claim 1, characterized in that: Between the outer wall of the first boss (103) and the inner wall of the casing cylinder body (101), and between the outer wall of the second boss (202) and the inner wall of the casing cylinder body (101), a skeleton ring groove (6) for the two ends of the skeleton (8) to move is formed.
3. The shaft movable support mechanism for a servo motor according to claim 1, characterized in that: An oil seal socket part (304) is further provided on the outer side of the first bearing socket part (301), and an oil seal (7) is arranged between the oil seal socket part (304) and the inner wall of the first through hole for the rotating shaft (104).
4. The rotating shaft movable support mechanism for a servo motor according to claim 3, characterized in that: A limiting retaining ring (305) is provided between the first bearing socket part (301) and the rotor core installation part (302).
5. The shaft movable support mechanism for a servo motor according to claim 1, wherein: The outer diameter of the first bearing socket part (301) is larger than the outer diameter of the rotor core installation part (302), and the outer diameter of the rotor core installation part (302) is larger than the outer diameter of the second bearing socket part (303).
6. The shaft movable support mechanism for a servo motor according to claim 5, characterized in that: The inner diameter of the first through hole for the rotating shaft (104) is smaller than the inner diameter of the first bearing embedding groove (105), and the inner diameter of the second through hole for the rotating shaft (201) is smaller than the inner diameter of the second bearing embedding groove (206).
7. The rotating shaft movable support mechanism for a servo motor according to claim 1, characterized in that: A first flange (203) that can extend into the inner side of the casing (1) and a second flange (204) that can act on the port of the casing (1) are provided on the side wall of the rear end cover (2).
8. The shaft movable support mechanism for a servo motor according to claim 7, wherein: A sealing ring groove (205) is further provided between the first flange (203) and the second flange (204), and a sealing ring is arranged in the sealing ring groove (205).
9. The shaft movable support mechanism for a servo motor according to claim 1, characterized in that: The casing cylinder body (101) and the front end cover (102) are integrally formed.
10. The shaft movable support mechanism for a servo motor according to claim 1, characterized in that: Both the casing (1) and the rear end cover (2) are made of corrosion-resistant metal materials.