Shell end cover applied to rotor in automobile electronic water pump

Abstract

A shell end cover applied to an inner rotor of an automobile electronic water pump comprises an end cover body arranged on an inner rotor shell, the end cover body is fixed to the inner rotor shell, the end cover body is provided with a sealing and positioning structure, the sealing and positioning structure comprises a positioning part and a sealing part, the positioning part is fixedly connected with the inner rotor shell, and an outer sealing piece is arranged on the sealing part. And the outer sealing piece is hermetically connected with the sealing part and the inner rotor shell respectively. The arrangement of the sealing positioning structure on the end cover body can ensure the tight connection between the inner rotor shell and the end cover, and effectively prevents the leakage of water or other liquid, thereby ensuring the normal work of the automobile electronic water pump. The positioning part in the sealing positioning structure is accurately matched with the inner rotor shell, so that accurate positioning of the end cover body is realized, and the mounting accuracy of the end cover body is ensured. And the sealing part is matched with the outer sealing piece, so that the stable sealing performance can be kept in the long-term use process.

Description

Technical Field

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

[0002] For the existing outer housing end covers used on automotive electronic water pumps, there are generally problems such as poor sealing performance and insecure installation. During the driving of an automobile, due to the influence of vibration and temperature changes, the outer housing end cover of the inner rotor may become loose or the seal may fail. This not only affects the normal operation of the automotive electronic water pump but also may cause safety hazards such as water leakage. Moreover, both the end cover and the housing are mostly made of metal and are fixed by welding, which increases the production cost and also has certain safety hazards, such as cracks may appear at the welded joints. Summary of the Invention

[0003] In view of this, the utility model provides an outer housing end cover applied to the inner rotor of an automotive electronic water pump.

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

[0005] An outer housing end cover applied to the inner rotor of an automotive electronic water pump, including an end cover body arranged on the outer housing of the inner rotor. The end cover body is fixed on the outer housing of the inner rotor. The end cover body has a sealing and positioning structure, and the sealing and positioning structure includes a positioning part and a sealing part. The positioning part is fixedly connected to the outer housing of the inner rotor, an outer seal is arranged on the sealing part, and the outer seal is hermetically connected to the sealing part and the outer housing of the inner rotor respectively.

[0006] Preferably, the sealing and positioning structure is arranged in a stepped shape on the edge of the end cover body away from the center of the end cover body. The positioning part is arranged on the upper part of the sealing part, the outer diameter of the positioning part is larger than the outer diameter of the sealing part, and one end of the outer housing of the inner rotor abuts against the positioning part and is fixedly connected by welding.

[0007] Preferably, an outer seal ring groove is formed between the sealing part and the inner wall of the outer housing of the inner rotor, and the outer seal is arranged in the outer seal ring groove.

[0008] Preferably, a rotating shaft through hole is opened at the center of the end cover body, a rotating shaft is arranged in the rotating shaft through hole, and one side of the end cover body close to the rotating shaft through hole protrudes inward towards the outer housing of the inner rotor to form an inner sealing and positioning end. The inner sealing and positioning end is arranged in an annular structure, an inner seal groove is formed between the inner sealing and positioning end and the rotating shaft, and the bottom of the inner sealing and positioning end is on the same horizontal line as the bottom end of the sealing part.

[0009] Preferably, an inner seal is disposed in the inner seal groove. The inner seal is sealingly connected to the rotating shaft and the groove wall of the inner seal groove respectively. The outer diameter of the inner seal is greater than the inner diameter of the inner seal groove.

[0010] Preferably, a portion of the end cap body between the inner seal positioning end and the sealing portion is recessed to form a relief ring groove.

[0011] Preferably, both the end cap body and the inner rotor housing are made of plastic material, and they are fixed by ultrasonic welding between the end cap body and the inner rotor housing.

[0012] The beneficial effects of the present invention are as follows: The setting of the seal positioning structure on the end cap body can ensure the tight connection between the inner rotor housing and the end cap, effectively preventing the leakage of water or other liquids, thereby ensuring the normal operation of the automotive electronic water pump. The positioning portion in the seal positioning structure realizes the precise positioning of the end cap body through precise cooperation with the inner rotor housing, ensuring the accuracy of its installation. The sealing portion cooperates with the outer seal, and can maintain stable sealing performance during long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention 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 invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0014] FIG Figure 1 is a schematic diagram of the end cap body;

[0015] FIG Figure 2 is a cross-sectional view of the assembly of the end cap body and the inner rotor of the automotive electronic water pump;

[0016] FIG Figure 3 is an enlarged view of part A in FIG Figure 2 ; DETAILED DESCRIPTION OF THE EMBODIMENTS

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

[0018] The present invention will be further described below with reference to the accompanying drawings of the specification.

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

[0020] As shown in the Figures 1-3 accompanying drawings, the present utility model discloses an end cover for the outer shell of an in-rotor of an automotive electronic water pump, which includes an end cover body 1 provided on the in-rotor outer shell 2. The end cover body 1 is fixed on the in-rotor outer shell 2. The end cover body 1 has a sealing and positioning structure 3. The sealing and positioning structure 3 includes a positioning portion 4 and a sealing portion 5. The positioning portion 4 is fixedly connected to the in-rotor outer shell 2. An outer seal 6 is provided on the sealing portion 5. The outer seal 6 is hermetically connected to the sealing portion 5 and the in-rotor outer shell 2 respectively. Specifically, in this design, the setting of the sealing and positioning structure 3 on the end cover body 1 can ensure the tight connection between the in-rotor outer shell 2 and the end cover, effectively preventing the leakage of water or other liquids, thereby ensuring the normal operation of the automotive electronic water pump. The positioning portion 4 in the sealing and positioning structure 3 is exquisitely designed. Through precise cooperation with the in-rotor outer shell 2, precise positioning of the end cover body 1 is achieved, ensuring the accuracy of its installation. The sealing portion 5 uses a high-quality outer seal 6. This outer seal 6 has good elasticity and wear resistance, and can maintain stable sealing performance during long-term use. Both the end cover body 1 and the in-rotor outer shell 2 are made of plastic. The end cover body 1 and the in-rotor outer shell 2 are fixed by ultrasonic welding. The plastic material of the end cover body 1 not only reduces the overall weight but also ensures good corrosion resistance, enabling it to maintain stable performance in various complex working environments. The fixing method of ultrasonic welding ensures the firm connection between the end cover body 1 and the in-rotor outer shell 2 and is not easy to loosen. Compared with traditional welding or bonding methods, ultrasonic welding can achieve efficient connection without generating thermal stress, greatly improving the service life of the end cover.

[0021] Furthermore, the sealing and positioning structure 3 is arranged in a stepped shape at the edge of the end cover body 1 on the side away from the center of the end cover body 1. The positioning portion 4 is arranged on the upper part of the sealing portion 5. The outer diameter of the positioning portion 4 is larger than the outer diameter of the sealing portion 5. One end of the in-rotor outer shell 2 abuts against the positioning portion 4 and is welded and fixed to the positioning portion 4. Specifically, in this embodiment, the stepped sealing and positioning structure 3 design further enhances the sealing performance and stability between the end cover body 1 and the in-rotor outer shell 2. The design with the outer diameter of the positioning portion 4 larger than the outer diameter of the sealing portion 5 makes the contact area between the positioning portion 4 and the in-rotor outer shell 2 larger, thereby improving the welding strength and sealing effect. When one end of the in-rotor outer shell 2 abuts against the positioning portion 4, through ultrasonic welding technology, the fixed connection between the two can be quickly and accurately achieved.

[0022] Furthermore, an outer sealing ring groove 7 is formed between the sealing portion 5 and the inner wall of the inner rotor housing 2, and the outer sealing member 6 is arranged in the outer sealing ring groove 7. Specifically, in this embodiment, the design of the outer sealing ring groove 7 further enhances the sealing performance of the sealing portion 5. When the outer sealing member 6 is installed in the outer sealing ring groove 7, it can fit tightly against the inner wall of the inner rotor housing 2 to form an effective waterproof barrier. The sealing connection between the outer sealing member 6, the sealing portion 5 and the inner rotor housing 2 together constitutes an efficient sealing system of the end cover 1 of the inner rotor housing 2 of the automotive electronic water pump. This design not only improves the waterproof performance of the water pump, but also extends the service life of the water pump.

[0023] Furthermore, a shaft through hole 8 is provided at the center of the end cover body 1, and a shaft 9 is arranged in the shaft through hole 8. The side of the end cover body 1 close to the shaft through hole 8 protrudes toward the inner rotor housing 2 to form an inner seal positioning end 10, and the inner seal positioning end 10 is provided in an annular structure, and an inner seal groove 11 is formed between the inner seal positioning end 10 and the shaft 9, and the bottom of the inner seal positioning end 10 is on the same horizontal line as the bottom end of the sealing portion 5. Specifically, in this embodiment, the shaft through hole 8 provided at the center of the end cover body 1 enables the shaft 9 of the automotive electronic water pump to pass through the end cover smoothly, thereby ensuring the normal operation of the water pump. The provision of the inner seal positioning end 10 further improves the sealing performance between the end cover and the shaft 9. The inner seal groove 11 formed between the inner seal positioning end 10 of the annular structure and the shaft 9 can accommodate the inner seal 12, thereby preventing water or other liquids from leaking from the gap between the shaft 9 and the end cover. This design not only improves the waterproof performance of the water pump, but also reduces the maintenance cost of the water pump. In addition, the design that the bottom of the inner sealing positioning end 10 is on the same horizontal line as the bottom of the sealing portion 5 makes the entire end cover more compact and reasonable in structure. This design not only optimizes the appearance of the end cover, but also improves its overall strength, making it less likely to deform or be damaged when subjected to external pressure or impact.

[0024] Furthermore, an inner seal 12 is provided in the inner seal groove 11, and the inner seal 12 is sealed with the rotating shaft 9 and the groove wall of the inner seal groove 11 respectively, and the outer diameter of the inner seal 12 is larger than the inner diameter of the inner seal groove 11. Specifically, in this embodiment, the provision of the inner seal 12 further enhances the sealing effect between the rotating shaft 9 and the end cover. Since the outer diameter of the inner seal 12 is larger than the inner diameter of the inner seal groove 11, this design enables the inner seal 12 to be subjected to a certain compression force during installation, so that it fits more closely on the rotating shaft 9 and the groove wall of the inner seal groove 11. This close fit not only improves the sealing performance, but also reduces the risk of leakage.

[0025] Further, a part of the end cover body 1 located between the inner sealing and positioning end 10 and the sealing part 5 is recessed inward to form a relief ring groove 13. Specifically, in this embodiment, the relief ring groove 13 is located between the inner sealing and positioning end 10 and the sealing part 5, providing a certain concave space for the end cover body 1. This design not only enhances the structural strength of the end cover but also improves its stability during operation. At the same time, the presence of the relief ring groove 13 helps to reduce the overall weight of the end cover, making the automotive electric water pump more energy-efficient during operation and reducing the contact area between the end cover body 1 and the inner rotor of the inner rotor housing 2, thereby reducing wear and friction and further extending the service life of the automotive electric water pump.

[0026] Specifically, both the inner seal 12 and the outer seal 6 are rubber rings.

[0027] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. 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 invention. Therefore, the present invention will not be limited to the embodiments shown herein but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A housing end cover applied to the inner rotor of an automotive electric water pump, characterized in that: It includes an end cover body provided on the inner rotor housing. The end cover body is fixed to the inner rotor housing. The end cover body has a sealing and positioning structure. The sealing and positioning structure includes a positioning part and a sealing part. The positioning part is fixedly connected to the inner rotor housing. An outer seal is provided on the sealing part. The outer seal is hermetically connected to the sealing part and the inner rotor housing respectively.

2. The outer shell end cover applied to the inner rotor of the automotive electric water pump according to claim 1, characterized in that: The sealing and positioning structure is arranged in a stepped shape at the edge of the end cover body on the side away from the center of the end cover body. The positioning part is arranged above the sealing part. The outer diameter of the positioning part is larger than the outer diameter of the sealing part. One end of the inner rotor housing abuts against the positioning part and is fixedly welded to the positioning part.

3. The housing end cover applied to the inner rotor of an automotive electric water pump according to claim 1, characterized in that: An outer seal ring groove is formed between the sealing part and the inner wall of the inner rotor housing. The outer seal is arranged in the outer seal ring groove.

4. The housing end cover applied to the inner rotor of the automotive electric water pump according to claim 1, wherein: A rotating shaft through hole is opened at the center of the end cover body. A rotating shaft is arranged in the rotating shaft through hole. One side of the end cover body close to the rotating shaft through hole protrudes inward towards the inner rotor housing to form an inner sealing and positioning end. The inner sealing and positioning end is arranged in an annular structure. An inner seal groove is formed between the inner sealing and positioning end and the rotating shaft. The bottom of the inner sealing and positioning end is on the same horizontal line as the bottom end of the sealing part.

5. The housing end cover applied to the inner rotor of an automotive electric water pump according to claim 4, characterized in that: An inner seal is arranged in the inner seal groove. The inner seal is hermetically connected to the rotating shaft and the groove wall of the inner seal groove respectively. The outer diameter of the inner seal is larger than the inner diameter of the inner seal groove.

6. The housing end cover applied to the inner rotor of the automotive electric water pump according to claim 4, wherein: The part of the end cover body between the inner sealing and positioning end and the sealing part is recessed inward to form a relief ring groove.

7. The housing end cover applied to the inner rotor of an automotive electric water pump according to claim 1, characterized in that: Both the end cover body and the inner rotor housing are made of plastic material. The end cover body and the inner rotor housing are fixedly connected by ultrasonic welding.

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