Anti-leakage automobile vacuum pump rotor

Abstract

The utility model discloses an anti-leakage automobile vacuum pump rotor which comprises a vacuum pump shell cover and a shaft column integrally formed on the outer wall of one side of the vacuum pump shell cover, a shaft sleeve single body is sleeved on the peripheral surface of the shaft column, and a rotor single body is arranged on the peripheral surface of the shaft sleeve single body. And an X-shaped shaft sleeve connecting structure for keeping co-rotation is arranged between the rotor monomers and the same end part of the X-shaped shaft sleeve connecting structure. According to the utility model, the shaft column, the shaft sleeve single body and other structures which are matched with each other are arranged, the integrality and rigidity of the structure are enhanced through the integral molding design of the shaft column and the pump shell cover, deformation caused by vibration or impact is reduced, a more stable rotating platform is provided for the rotor single body, and the service life of the rotor single body is prolonged. Due to the stability, eccentricity and shaking generated when the rotor rotates at a high speed are reduced, friction and abrasion between the rotor and the shaft sleeve are effectively reduced, media (such as oil and air) are prevented from leaking through abrasion gaps, and therefore the high vacuum degree and the sealing performance of the vacuum pump are maintained.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum pumps, in particular to a leakage-proof automobile vacuum pump rotor. Background Art

[0002] The automotive vacuum pump rotor is a key component in the braking system. Its function is to create a dynamic volume change within the pump body through rotation, creating a vacuum on one side while compressing and discharging air or lubricant on the other. This vacuum provides the necessary negative pressure for the brake booster, enhancing the braking force when the driver depresses the brake pedal, making braking more rapid and effective. Its structural principle is based on the working principle of a positive displacement pump. The rotor typically consists of multiple blades. As the rotor rotates, these blades periodically change volume within the pump chamber, creating a low-pressure area that draws in air (or lubricant). The subsequent decrease in volume compresses and discharges the medium, thus creating a continuous vacuum effect. This design not only improves the responsiveness and efficiency of the braking system but also ensures driving safety and comfort. Currently, automotive vacuum pump rotors are typically mounted on the pump shaft using a keyway. However, as the vacuum pump continues to operate, the keyway between the pump shaft and the rotor gradually loses its original precision due to wear. This wear can cause a gap between the pump shaft and the rotor, allowing the medium inside the pump body to leak through this gap, thus affecting the sealing performance of the entire vacuum pump. Utility Model Content

[0003] The purpose of the utility model is to provide a leakage-proof automobile vacuum pump rotor, a shaft column for stabilizing the rotation of the rotor unit is integrally formed on the vacuum pump pump housing cover, and a shaft sleeve unit for connecting to the rotor unit is installed on the outside of the shaft column, and an X-shaped shaft sleeve connection structure is adopted between the shaft sleeve unit and the rotor unit. In this way, when the vacuum pump shaft drives the rotor unit, the rotor unit can rotate stably, thereby reducing the wear between the rotor unit and the vacuum pump shaft, thereby solving the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a leakage-proof automobile vacuum pump rotor, comprising a vacuum pump casing cover and a shaft column integrally formed on the outer wall of one side of the vacuum pump casing cover, and the outer peripheral surface of the shaft column is covered with a shaft sleeve monomer, the outer peripheral surface of the shaft sleeve monomer is provided with a rotor monomer, and an X-shaped shaft sleeve connection structure for maintaining corotation is provided between the rotor monomer and the same end of the X-shaped shaft sleeve connection structure.

[0005] Preferably, the shaft sleeve unit is made of alloy steel, and a column cavity for fitting with the shaft column is provided inside the shaft sleeve unit.

[0006] Preferably, both ends of the surface of the shaft sleeve are provided with annular grooves, and a sealing ring is embedded in the annular groove, and the outer diameter of the sealing ring is greater than or equal to the inner diameter of the vacuum pump casing cover.

[0007] Preferably, an annular cavity is provided on the outer wall of the vacuum pump casing cover close to the shaft column, and a docking ring is integrally formed on the outer wall of the rotor unit close to the vacuum pump casing cover. The docking ring and the annular cavity are fitted into each other, and the outer diameter of the docking ring is equal to the diameter of the annular cavity.

[0008] Preferably, the X-shaped sleeve connection structure includes four protruding arms integrally formed on the outer wall of one side of the sleeve unit, a fan-shaped cavity portion arranged between two adjacent protruding arms, and a fan-shaped protrusion portion on the inner wall of the rotor unit for plugging and mating with the fan-shaped cavity portion.

[0009] Preferably, a support ring is integrally formed at the same end of the four protruding arms, and a rectangular spline is provided on the inner wall of the support ring.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows: the leakage-proof automobile vacuum pump rotor is provided with a structure that cooperates with each other, such as a shaft column, a shaft sleeve unit, etc. The one-piece molding design of the shaft column and the pump casing cover enhances the integrity and rigidity of the structure, reduces deformation caused by vibration or impact, and provides a more stable rotation platform for the rotor unit. This stability reduces the eccentricity and shaking of the rotor during high-speed rotation, and reduces the risk of seal wear or damage caused by rotor imbalance. The X-shaped shaft sleeve connection structure adopted between the shaft sleeve unit and the rotor unit not only achieves precise centering and positioning, but also effectively reduces the friction and wear between the rotor and the shaft sleeve by dispersing stress and uniformly transmitting torque. This low-wear contact interface helps to maintain the integrity of the seal and prevents the medium (such as oil, air, etc.) from leaking through the wear gap, thereby maintaining the high vacuum degree and sealing performance of the vacuum pump. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0013] Figure 3 It is a schematic diagram of the three-dimensional cross-sectional structure of the utility model;

[0014] Figure 4 This is a schematic diagram of the three-dimensional structure of the shaft sleeve monomer of the present utility model;

[0015] Figure 5 This is a schematic diagram of the three-dimensional cross-sectional structure of the vacuum pump casing cover of the present utility model;

[0016] Figure 6 It is a schematic diagram of the three-dimensional structure of the rotor monomer of the utility model.

[0017] In the figure: 1. Vacuum pump casing cover; 2. Annular cavity; 3. Shaft column; 4. Shaft sleeve unit; 401. Column cavity; 402. Annular groove; 403. Sealing ring; 5. Rotor unit; 501. Docking ring; 502. Fan-shaped protrusion; 6. X-shaped shaft sleeve connection structure; 601. Projecting arm; 602. Fan-shaped cavity; 603. Support ring; 604. Rectangular spline. DETAILED DESCRIPTION

[0018] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0019] See also Figure 1-6 The present invention provides an embodiment of a leak-proof automobile vacuum pump rotor, comprising a vacuum pump housing cover 1 and a shaft column 3 integrally formed on an outer wall of one side of the vacuum pump housing cover 1. The shaft column 3 is sheathed with a shaft sleeve unit 4 on its outer circumference. A rotor unit 5 is disposed on its outer circumference. An X-shaped shaft sleeve connection structure 6 is disposed between the rotor unit 5 and the same end of the X-shaped shaft sleeve connection structure 6 for maintaining co-rotation.

[0020] The shaft sleeve unit 4 is made of alloy steel, and a column cavity 401 is provided inside the shaft sleeve unit 4 for fitting with the shaft column 3;

[0021] Both ends of the surface of the shaft sleeve body 4 are provided with annular grooves 402, and the inner part of the annular groove 402 is embedded with a sealing ring 403, and the outer diameter of the sealing ring 403 is greater than or equal to the inner diameter of the vacuum pump housing cover 1;

[0022] When the shaft column 3 and the shaft sleeve unit 4 are assembled, the shaft sleeve unit 4 is sleeved onto the outer circumferential surface of the shaft column 3 through the column cavity 401. At this time, the annular groove 402 and the sealing ring 403 provided on the outer circumferential surface of the shaft sleeve unit 4 are used to seal the contact surface between the vacuum pump housing cover 1 and the shaft sleeve unit 4.

[0023] An annular cavity 2 is provided on the outer wall of the vacuum pump casing cover 1 on one side close to the shaft column 3. A docking ring 501 is integrally formed on the outer wall of the rotor monomer 5 on the side close to the vacuum pump casing cover 1. The docking ring 501 and the annular cavity 2 are mutually nested, and the outer diameter of the docking ring 501 is equal to the diameter of the annular cavity 2. When the vacuum pump shaft drives the rotor monomer 5 to rotate through the shaft sleeve monomer 4, the docking ring 501 is located in the annular cavity 2 of the vacuum pump casing cover 1. The cooperation between the docking ring 501 and the annular cavity 2 makes the rotation of the rotor monomer 5 more stable and reliable.

[0024] The X-shaped sleeve connection structure 6 includes four protruding arms 601 integrally formed on the outer wall of one side of the sleeve monomer 4, a fan-shaped cavity portion 602 arranged between two adjacent protruding arms 601, and a fan-shaped protrusion 502 on the inner wall of the rotor monomer 5 for plugging and matching with the fan-shaped cavity portion 602. When the sleeve monomer 4 and the rotor monomer 5 are transferred through the X-shaped sleeve connection structure 6, the rotor monomer 5 is concentrically sleeved on the outer circumferential surface of the X-shaped sleeve connection structure 6, and the fan-shaped protrusions 502 on the inner wall of the rotor monomer 5 are matched one by one with the fan-shaped cavity portion 602, so that the sleeve monomer 4 and the rotor monomer 5 can be connected, reducing the eccentricity and shaking generated by the rotor monomer 5 during high-speed rotation;

[0025] A support ring 603 is integrally formed at the same end of the four protruding arms 601, and a rectangular spline 604 is provided on the inner wall of the support ring 603. When the external pump shaft is connected to the sleeve monomer 4, the key convex structure on the pump shaft cooperates with the rectangular spline 604 on the inner wall of the support ring 603, so that the shaft body and the sleeve monomer 4 are dynamically connected.

[0026] When the embodiment of the present application is in use, the staff first takes out the vacuum pump casing cover 1, the sleeve monomer 4 and the rotor monomer 5 to be assembled, so that the sleeve monomer 4 is mounted on the shaft column 3, and the sleeve monomer 4 and the shaft column 3 are assembled in place. The shaft column 3 serves as the support point for the rotation of the sleeve monomer 4 and the rotor monomer 5, ensuring good coordination between itself and the rotor monomer 5 and withstanding various forces generated during rotation. It is used to connect the shaft column 3 and support the rotor monomer 5, which reduces the direct contact between the rotor monomer 5 and the shaft column 3, reduces friction and wear, and thus extends the service life of the parts. The sleeve monomer 4 also has certain centering and positioning functions to ensure that the rotor monomer 5 maintains the correct position during rotation. Posture, then the staff used the X-shaped sleeve connection structure 6 to connect the rotor monomer 5 and the sleeve monomer 4 together. The X-shaped design can effectively disperse and transmit torque, reduce the stress concentration caused by rotation, and adapt to the slight deformation of the rotor monomer 5 during rotation, so as to maintain the stability of the sealing performance. When the vacuum pump is started, the vacuum pump motor drives the pump shaft to rotate, and the pump shaft drives the rotor monomer 5 to rotate together through the sleeve monomer 4. The volume change generated by the rotor monomer 5 during rotation causes the gas to be sucked in and compressed, and then discharged through the exhaust port. In this process, the X-shaped sleeve connection structure 6 ensures the stable connection and torque transmission between the sleeve monomer 4 and the rotor monomer 5.

[0027] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0028] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A leak-proof automobile vacuum pump rotor, characterized by: The invention comprises a vacuum pump casing cover (1) and a shaft column (3) integrally formed on an outer wall of one side of the vacuum pump casing cover (1), wherein the outer peripheral surface of the shaft column (3) is sheathed with a shaft sleeve monomer (4), the outer peripheral surface of the shaft sleeve monomer (4) is provided with a rotor monomer (5), and an X-shaped shaft sleeve connection structure (6) for maintaining co-rotation is provided between the same end of the rotor monomer (5) and the X-shaped shaft sleeve connection structure (6).

2. The leak-proof automobile vacuum pump rotor according to claim 1, characterized in that: The shaft sleeve monomer (4) is made of alloy steel, and a column cavity (401) for fitting with the shaft column (3) is provided inside the shaft sleeve monomer (4).

3. The leak-proof automobile vacuum pump rotor according to claim 1, characterized in that: Both ends of the surface of the shaft sleeve monomer (4) are provided with annular grooves (402), and a sealing ring (403) is embedded inside the annular groove (402). The outer diameter of the sealing ring (403) is greater than or equal to the inner diameter of the vacuum pump casing cover (1).

4. The leak-proof automobile vacuum pump rotor according to claim 1, characterized in that: An annular cavity (2) is provided on the outer wall of the vacuum pump casing cover (1) on one side close to the shaft column (3); a docking ring (501) is integrally formed on the outer wall of the rotor unit (5) on one side close to the vacuum pump casing cover (1); the docking ring (501) and the annular cavity (2) are fitted together, and the outer diameter of the docking ring (501) is equal to the diameter of the annular cavity (2).

5. The leak-proof automobile vacuum pump rotor according to claim 1, characterized in that: The X-shaped shaft sleeve connection structure (6) comprises four protruding arms (601) integrally formed on the outer wall of one side of the shaft sleeve unit (4), a fan-shaped cavity (602) arranged between two adjacent protruding arms (601), and a fan-shaped protrusion (502) on the inner wall of the rotor unit (5) for plugging and matching with the fan-shaped cavity (602).

6. The anti-leakage automobile vacuum pump rotor according to claim 5, characterized in that: A support ring (603) is integrally formed at the same end of the four protruding arms (601), and a rectangular spline (604) is provided on the inner wall of the support ring (603).

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