Improved automobile vacuum pump rotor

Abstract

The utility model discloses an improved automobile vacuum pump rotor which comprises a shaft seat and a bearing single body fixed in the shaft seat, a main butt joint shaft is rotatably installed in the shaft seat, an inner spline protruding shaft matched with an inner ring of the bearing single body is integrally formed at one end of the main butt joint shaft, and an outer spline protruding shaft matched with an outer ring of the bearing single body is integrally formed at the other end of the main butt joint shaft. A clamping claw jaw structure is arranged at the other end of the main butt joint shaft, an auxiliary shaft is installed at the end, away from the shaft seat, of the main butt joint shaft through the clamping claw jaw structure, and a rotor body is integrally formed on the peripheral face of the auxiliary shaft. By means of the connection mode of the internal spline convex shaft and the main butt joint shaft, more efficient torque transmission can be achieved, torque can be evenly distributed on a large contact area through the internal spline structure, and therefore the stress concentration phenomenon caused by torque concentration is reduced, and the service life of the internal spline structure is prolonged. And the design of the claw tooth embedding structure can effectively ensure the concentricity and the centering degree between the main butt joint shaft and the rotor body, and the eccentricity phenomenon caused by centrifugal force can be obviously reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automotive vacuum pumps, and particularly to an improved rotor of an automotive vacuum pump. Background Technique

[0002] The rotor of an automotive vacuum pump plays a crucial role in the operation of the entire pump. Its main function is to achieve the inhalation and compression of gas through rotation, thereby generating the necessary negative pressure to support the operation of systems such as the brake booster. The rotor is usually designed with a specific geometric shape to optimize the gas flow path and improve the efficiency of vacuum generation. During rotation, the rotor can form a low-pressure area to attract the surrounding gas into the pump body to ensure the stability of the vacuum environment. There are various connection methods between the rotor and the rotating shaft of the vacuum pump to ensure the efficient operation of the rotor. At present, the connection method between the rotor of the automotive vacuum pump and the rotating shaft often adopts a direct connection method. The direct connection usually fixes the rotor on the rotating shaft through a keyway or spline. At this time, the motor directly drives the rotor. In this case, the rotation of the rotating shaft is provided by the motor. This connection method has a simple structure and is easy to install. However, there is a certain alignment error between the rotating shaft and the rotor, that is, the direct connection method cannot effectively compensate for these errors, resulting in uneven wear and increased vibration. This wear will not only affect the rotation efficiency of the rotor but also easily lead to the connection failure of the rotor and the rotating shaft, thus affecting the overall performance of the vacuum pump; Content of the Utility Model

[0003] The purpose of the utility model is to provide an improved rotor of an automotive vacuum pump. The relative ends of the main docking shaft and the rotor body are connected through a claw spline structure to ensure the concentricity and alignment between the main docking shaft and the rotor body. At this time, the rotating shaft of the vacuum pump motor is connected to the main docking shaft through an internal spline convex shaft. At this time, the motor rotating shaft drives the internal spline convex shaft, the main docking shaft, and the rotor body to rotate in sequence to solve the problems raised in the above background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solution: An improved rotor of an automotive vacuum pump, including a shaft seat and a bearing unit fixed inside the shaft seat. The main docking shaft is rotatably installed inside the shaft seat. One end of the main docking shaft is integrally formed with an internal spline convex shaft that cooperates with the inner ring of the bearing unit. The other end of the main docking shaft is provided with a claw spline structure. The end of the main docking shaft away from the shaft seat is installed with a secondary shaft through the claw spline structure. The outer peripheral surface of the secondary shaft is integrally formed with a rotor body.

[0005] Preferably, the top and bottom of the shaft seat are integrally formed with lugs, and internal threaded holes are provided inside the lugs.

[0006] Preferably, the bearing unit adopts a roller bearing. The outer ring of the roller bearing is fixedly connected to the inner wall of the shaft seat, and the inner ring of the roller bearing is in interference fit with the inner spline convex shaft.

[0007] Preferably, the inner diameters of the inner spline convex shaft, the main docking shaft, and the auxiliary shaft are equal.

[0008] Preferably, the claw jaw coupling structure includes a plurality of equally spaced first inclined claws integrally formed at one end of the main docking shaft and a plurality of equally spaced second inclined claws integrally formed at one end of the auxiliary shaft. A first docking portion for inserting the second inclined claws is provided between adjacent two first inclined claws, and a second docking portion for inserting the first inclined claws is provided between adjacent two of the second inclined claws.

[0009] Preferably, an outward expansion portion is provided on the outer wall of the main docking shaft, and an annular supporting edge in contact with the outward expansion portion is provided on the inner wall of the shaft seat.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows: Through the connection mode of the inner spline convex shaft and the main docking shaft of the improved automotive vacuum pump rotor, more efficient torque transmission can be achieved. The inner spline structure can evenly distribute the torque over a larger contact area, thereby reducing the stress concentration phenomenon caused by torque concentration. The design of the claw jaw coupling structure can effectively ensure the concentricity and alignment between the main docking shaft and the rotor body, significantly reducing the eccentricity phenomenon caused by centrifugal force, making the rotation process of the rotor body more stable, and significantly reducing the vibration, wear, and noise levels. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic three-dimensional structure diagram of the present utility model Figure 1 ;

[0012] Figure 2 is a schematic three-dimensional structure diagram of the present utility model Figure 2 ;

[0013] Figure 3 is a schematic three-dimensional structure diagram of the shaft seat and the main spline shaft of the present utility model in a separated state Figure 1 ;

[0014] Figure 4 is a schematic three-dimensional structure diagram of the shaft seat and the main spline shaft of the present utility model in a separated state Figure 2 ;

[0015] Figure 5 is a schematic three-dimensional sectional structure diagram of the present utility model.

[0016] In the figure: 1. Shaft seat; 101. Lug; 2. Bearing unit; 3. Main docking shaft; 301. Internal spline convex shaft; 4. Rotor body; 5. Auxiliary shaft; 6. Claw jaw coupling structure; 601. First inclined claw; 602. First docking part; 603. Second inclined claw; 604. Second docking part. Detailed implementation mode

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0018] Please refer to Figures 1-5 , an embodiment provided by the present invention: an improved automotive vacuum pump rotor, including a shaft seat 1 and a bearing unit 2 fixed inside the shaft seat 1. A main docking shaft 3 is rotatably installed inside the shaft seat 1. One end of the main docking shaft 3 is integrally formed with an internal spline convex shaft 301 that cooperates with the inner ring of the bearing unit 2. An outward expansion part is provided on the outer wall of the main docking shaft 3, and an annular supporting edge that contacts the outward expansion part is provided on the inner wall of the shaft seat 1;

[0019] A claw jaw coupling structure 6 is provided at the other end of the main docking shaft 3. The main docking shaft 3 is installed with an auxiliary shaft 5 through the claw jaw coupling structure 6 at the end far from the shaft seat 1, and a rotor body 4 is integrally formed on the outer peripheral surface of the auxiliary shaft 5;

[0020] Lugs 101 are integrally formed at the top and bottom of the shaft seat 1. Internal threaded holes are provided inside the lugs 101. The shaft seat 1 is installed on the inner wall of the front shell or the rear shell of the automotive vacuum pump through the lugs 101 and bolts to form the structural basis of the rotor;

[0021] The inner diameters of the internal spline convex shaft 301, the main docking shaft 3, and the auxiliary shaft 5 are equal. The bearing unit 2 adopts a roller bearing. The outer ring of the roller bearing is fixedly connected to the inner wall of the shaft seat 1, and the inner ring of the roller bearing is in interference fit with the internal spline convex shaft 301;

[0022] The internal spline convex shaft 301 integrally formed at the end of the main docking shaft 3 cooperates with the inner ring of the bearing unit 2 to support the rotation of the main docking shaft 3, the auxiliary shaft 5, and the rotor body 4, reduce friction and wear, and ensure the smoothness of operation; the bearing unit 2 can bear a large load and extend the service life of the pump body;

[0023] The claw tooth structure 6 includes a plurality of equally spaced first bevel claws 601 integrally formed at one end of the main docking shaft 3 and a plurality of equally spaced second bevel claws 603 integrally formed at one end of the secondary shaft 5. A first docking portion 602 for plugging the second bevel claws 603 is provided between two adjacent first bevel claws 601, and a second docking portion 604 for plugging the first bevel claws 601 is provided between two adjacent second bevel claws 603. During the docking process between the rotor body 4 and the secondary shaft 5, each second bevel claw 603 at the end of the secondary shaft 5 is inserted into the first docking portion 602 between two adjacent first bevel claws 601, thereby automatically ensuring the concentricity and centering between the main docking shaft 3 and the rotor body 4, and distributing the torque more evenly. The efficient torque transmission and stable rotation enable the motor to be more effectively converted into the working power of the rotor, thereby ensuring the stability of the power transmission of the vacuum pump.

[0024] When the embodiment of the present application is in use, first, the shaft seat 1 is fixed to the inner wall of the front shell or the rear shell of the automobile vacuum pump by bolting. The shaft seat 1 is the basic part of the entire structure, which is responsible for supporting the main docking shaft 3, the secondary shaft 5 and other transmission components, and providing a stable working platform. It withstands various forces generated during work and ensures the normal operation of the bearing. Then the staff concentrically docks one end of the internal spline convex shaft 301 to the inner ring of the bearing monomer 2. The bearing monomer 2 ensures the rotation stability of the main docking shaft 3 and the rotor body 4 and reduces the rotational friction loss of the rotor. The rotating shaft of the vacuum pump motor is docked with the internal spline convex shaft 301, and the rotating shaft of the motor is connected by its own The spline structure is connected to the internal spline cam 301 to ensure effective torque transmission. The internal spline cam 301 makes the rotation more stable and can effectively disperse the load. When installing the main docking shaft 3 and the motor shaft, attention should be paid to the alignment with the motor shaft to avoid vibration and wear caused by poor alignment. Then the staff will dock the rotor body 4 and the secondary shaft 5 with the main docking shaft 3 using the claw tooth embedding structure 6. Through the claw tooth embedding, the end of the main docking shaft 3 is tightly matched with the corresponding part of the secondary shaft 5. The embedding structure can not only ensure the concentricity and alignment accuracy, but also effectively transmit the rotational torque, ensuring that it can be tightly combined during connection to reduce sliding or loosening.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative effort.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or equivalently replace some of the technical features. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An improved automobile vacuum pump rotor, characterized in that: The invention comprises a shaft seat (1) and a bearing unit (2) fixed inside the shaft seat (1); a main docking shaft (3) is rotatably installed inside the shaft seat (1); one end of the main docking shaft (3) is integrally formed with an inner spline convex shaft (301) that cooperates with the inner ring of the bearing unit (2); the other end of the main docking shaft (3) is provided with a claw tooth structure (6); the end of the main docking shaft (3) away from the shaft seat (1) is installed with a secondary shaft (5) through the claw tooth structure (6); the outer peripheral surface of the secondary shaft (5) is integrally formed with a rotor body (4).

2. The improved automobile vacuum pump rotor according to claim 1, characterized in that: Lugs (101) are integrally formed at the top and bottom ends of the shaft seat (1), and an internal threaded hole is provided inside the lugs (101).

3. The improved automobile vacuum pump rotor according to claim 1, characterized in that: The bearing monomer (2) adopts a roller bearing, the outer ring of the roller bearing is fixedly connected to the inner wall of the shaft seat (1), and the inner ring of the roller bearing is interference fit with the inner spline convex shaft (301).

4. The improved automobile vacuum pump rotor according to claim 1, characterized in that: The inner diameters of the internal spline convex shaft (301), the main docking shaft (3), and the secondary shaft (5) are equal.

5. The improved automobile vacuum pump rotor according to claim 1, characterized in that: The claw tooth embedding structure (6) comprises a plurality of first oblique claws (601) formed integrally at one end of the main docking shaft (3) and a plurality of second oblique claws (603) formed integrally at one end of the secondary shaft (5) and a plurality of second oblique claws (603) formed integrally at one end of the secondary shaft (5), a first docking portion (602) for plugging the second oblique claws (603) is provided between two adjacent first oblique claws (601), and a second docking portion (604) for plugging the first oblique claws (601) is provided between two adjacent second oblique claws (603).

6. The improved automobile vacuum pump rotor according to claim 1, characterized in that: An outward expansion portion is arranged on the outer wall of the main docking shaft (3), and an annular supporting edge in contact with the outward expansion portion is arranged on the inner wall of the shaft seat (1).

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