Rotor shell applied to rotor in automobile electronic water pump

Abstract

A rotor shell applied to an inner rotor of an automobile electronic water pump comprises a shell body, the shell body is provided with a body part and a rotor supporting part, the rotor supporting part is formed by extending the bottom end of the body part towards the central axis direction of the shell body, a rotating shaft mounting hole is formed in the body part, and positioning ribs are arranged on the inner wall of the rotating shaft mounting hole. The positioning rib is arranged on the inner wall of the rotating shaft mounting hole, and the positioning rib can be matched with the rotating shaft penetrating through the rotating shaft mounting hole, so that the sealing ring at the position is restrained, and the stability and the sealing performance of the rotating shaft in the rotating process are guaranteed. In addition, due to the design, displacement or damage of the sealing ring caused by vibration or abrasion can be effectively reduced, and therefore the reliability of the automobile electronic water pump is improved, and the service life of the automobile electronic water pump is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of automotive electric water pumps, and particularly relates to a rotor housing applied to the inner rotor of an automotive electric water pump. Background Art

[0002] The housing of the inner rotor in the existing automotive electric water pumps usually adopts a traditional structural design, which has certain limitations in the support and sealing performance of the rotor and is difficult to meet the requirements of modern automotive electric water pumps for high efficiency, stability, and strong sealing performance. Therefore, designing a new type of rotor housing to improve the performance and reliability of automotive electric water pumps has become an urgent problem to be solved in the current technical field of automotive electric water pumps. Summary of the Invention

[0003] In view of this, the utility model provides a rotor housing applied to the inner rotor of an automotive electric water pump.

[0004] To achieve the above object, the utility model provides the following technical solutions:

[0005] A rotor housing applied to the inner rotor of an automotive electric water pump, including a housing body, the housing body has a body part and a rotor support part, the rotor support part extends from the bottom end of the body part towards the central axis direction of the housing body, a shaft installation hole is opened on the body part, and positioning ribs are arranged on the inner wall of the shaft installation hole.

[0006] Preferably, a shaft is arranged in the housing body, the shaft passes through the shaft installation hole and is connected to the housing body, and the shaft is in interference fit with the positioning ribs on the inner wall of the shaft installation hole.

[0007] Preferably, a plurality of the positioning ribs are arranged at equal intervals, and the positioning ribs have an arc surface in contact with the shaft.

[0008] Preferably, a rotor installation cavity is formed between the body part and the rotor support part, a part of the rotor installation cavity close to the shaft installation hole sinks to form a sealing ring installation groove, the sealing ring installation groove and the shaft installation hole form a stepped structure, a sealing ring is arranged in the sealing ring installation groove, and the sealing ring is in sealing connection with the groove wall of the sealing ring installation groove and the shaft respectively.

[0009] Preferably, the inner wall of the bottom of the rotor installation cavity sinks to form an annular relief groove on the side away from the shaft installation hole.

[0010] Preferably, a top cover is arranged on the top of the housing body, and the top cover is welded and fixed to the body part.

[0011] Preferably, the wall thickness of the housing body is 0.3 - 0.6 mm, and both the housing body and the top cover are made of plastic materials.

[0012] The beneficial effects of the present utility model are as follows: By providing positioning ribs on the inner wall of the rotating shaft mounting hole, the positioning ribs can cooperate with the rotating shaft passing through the rotating shaft mounting hole to realize the restraint of the sealing ring at this position, thereby ensuring the stability and sealing performance during the rotation of the rotating shaft. In addition, this design can also effectively reduce the displacement or damage of the sealing ring caused by vibration or wear, thereby improving the reliability and service life of the automotive electronic water pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0014] FIG Figure 1 is a schematic structural diagram of the rotor housing;

[0015] FIG Figure 2 is Figure 1 an enlarged view of part A in

[0016] FIG Figure 3 is a sectional view of the assembly of the rotor housing and the inner rotor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0018] The following will further describe the present utility model with reference to the accompanying drawings of the specification.

[0019] The present utility model provides the following technical solutions:

[0020] As shown in FIG Figures 1 - 3As shown in the figure, the utility model discloses a rotor housing applied to the inner rotor of an automotive electronic water pump, including a housing body 1. The housing body 1 has a body part 3 and a rotor support part 4. The rotor support part 4 extends from the bottom end of the body part 3 towards the central axis direction of the housing body 1. A shaft installation hole 2 is provided on the body part 3, and positioning ribs 5 are arranged on the inner wall of the shaft installation hole 2. Specifically, in this design, by arranging the positioning ribs 5 on the inner wall of the shaft installation hole 2, the positioning ribs 5 can cooperate with the shaft 7 passing through the shaft installation hole 2 to realize the constraint of the sealing ring 6 at this position, thereby ensuring the stability and sealing performance of the shaft 7 during rotation. In addition, this design can also effectively reduce the displacement or damage of the sealing ring 6 caused by vibration or wear, thereby improving the reliability and service life of the automotive electronic water pump.

[0021] Furthermore, a shaft 7 is arranged inside the housing body 1. The shaft 7 passes through the shaft installation hole 2 and is connected to the housing body 1. The shaft 7 is in interference fit with the positioning ribs on the inner wall of the shaft installation hole 2. Specifically, in this embodiment, the interference fit between the shaft 7 and the positioning ribs 5 ensures the stability and accuracy of the shaft 7 in the rotor housing, thereby optimizing the operating efficiency and performance of the electronic water pump. When the rotor rotates, due to the effect of the interference fit, the small displacements of the shaft 7 in the axial and radial directions are effectively suppressed, which further improves the sealing performance of the sealing ring 6 and prevents the leakage of the liquid inside the water pump.

[0022] Furthermore, a number of the positioning ribs are arranged at equal intervals. The positioning rib 5 has an arc surface 8 in contact with the shaft 7. Specifically, in this embodiment, the arc surface 8 design of the positioning rib 5 can better adapt to the contour of the shaft 7, increasing the contact area between the positioning rib 5 and the shaft 7, thereby improving the tightness and stability of the fit. The positioning ribs 5 arranged at equal intervals can ensure uniform support and constraint at each position of the shaft 7, effectively reducing the wear and damage caused by local stress concentration.

[0023] Furthermore, a rotor installation cavity 9 is formed between the body part 3 and the rotor support part 4. A part of the rotor installation cavity 9 close to the rotating shaft installation hole 2 sinks to form a sealing ring installation groove 10. The sealing ring installation groove 10 and the rotating shaft installation hole 2 form a stepped structure. A sealing ring 6 is arranged in the sealing ring installation groove 10. The sealing ring 6 is in sealed contact with the groove wall of the sealing ring installation groove 10 and the rotating shaft 7 respectively. Specifically, in this embodiment, the stepped structure formed by the sunken sealing ring installation groove 10 and the rotating shaft installation hole 2 provides a more stable installation environment for the sealing ring 6. Such a design enables the sealing ring 6 to be evenly distributed when under pressure, thereby improving the sealing effect of the sealing ring 6. At the same time, the close contact between the sealing ring 6 and the groove wall of the sealing ring installation groove 10 and the rotating shaft 7 further enhances the reliability of the seal and effectively prevents the leakage of the liquid inside the water pump. Furthermore, the sealing ring 6 is made of an elastic material and has good elasticity and wear resistance. The selection of this material enables the sealing ring 6 to deform to a certain extent when under pressure to adapt to the sealing requirements under different pressures. At the same time, the wear resistance also ensures that the sealing ring 6 is not easily damaged during long-term operation, extending the service life of the automotive electronic water pump.

[0024] Furthermore, on one side of the inner wall of the bottom of the rotor installation cavity 9 away from the rotating shaft installation hole 2, a circular relief groove 11 is formed by sinking. Specifically, in this embodiment, the existence of the circular relief groove 11 not only provides additional space for the installation of the rotor, reducing friction and obstruction during the installation process, but also alleviates the thermal stress generated by the rotor during operation to a certain extent, extending the service life of the rotor and the entire automotive electronic water pump.

[0025] Furthermore, a top cover 12 is arranged on the top of the housing body 1. The top cover 12 is fixedly welded to the body part 3. The wall thickness of the housing body 1 is 0.3 - 0.6 mm. Both the housing body 1 and the top cover 12 are made of plastic. Specifically, in this embodiment, the housing body 1 and the top cover 12 are made of plastic, which not only reduces the overall weight of the automotive electronic water pump, improves the convenience of installation, but also reduces the production cost. The housing body 1 and the top cover 12 are fixedly welded together to ensure the sealing and structural stability of the housing. The wall thickness of the housing body 1 is designed to be 0.3 - 0.6 mm. Such a design not only ensures the strength of the housing but also avoids material waste, achieving a lightweight design.

[0026] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but rather should be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A rotor housing applied to the inner rotor of an automotive electric water pump, characterized in that: It includes a housing body, the housing body has a main body part and a rotor support part, the rotor support part extends from the bottom end of the main body part towards the central axis direction of the housing body, a shaft installation hole is formed on the main body part, and positioning ribs are arranged on the inner wall of the shaft installation hole.

2. The rotor housing applied to the inner rotor of an automotive electric water pump according to claim 1, characterized in that: A shaft is arranged inside the housing body, the shaft passes through the shaft installation hole and is connected to the housing body, and the shaft is in interference fit with the positioning ribs on the inner wall of the shaft installation hole.

3. The rotor housing applied to the inner rotor of an automotive electric water pump according to claim 2, characterized in that: A number of the positioning ribs are arranged at equal intervals, and the positioning ribs have arc-shaped surfaces in contact with the shaft.

4. The rotor housing applied to the inner rotor of an automotive electric water pump according to claim 1, wherein: A rotor installation cavity is formed between the main body part and the rotor support part, a part of the rotor installation cavity close to the shaft installation hole sinks to form a sealing ring installation groove, the sealing ring installation groove and the shaft installation hole form a stepped structure, a sealing ring is arranged in the sealing ring installation groove, and the sealing ring is in sealing connection with the groove wall of the sealing ring installation groove and the shaft respectively.

5. The rotor housing applied to the inner rotor of an automotive electric water pump according to claim 4, characterized in that: A circular relief groove is formed by sinking on one side of the inner wall of the bottom of the rotor installation cavity away from the shaft installation hole.

6. The rotor housing applied to the inner rotor of an automotive electric water pump according to claim 1, characterized in that: An upper cover is arranged at the top of the housing body, and the upper cover is welded and fixed to the main body part.

7. The rotor housing applied to the inner rotor of an automotive electric water pump according to claim 6, characterized in that: The wall thickness of the housing body is 0.3 - 0.6 mm, and both the housing body and the upper cover are made of plastic material.

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