Automobile cooling water pump impeller hub bearing sleeve

Abstract

The utility model provides an automobile cooling water pump impeller hub bearing bush which comprises a bush body and a shoulder on the outer wall of the bush body, a front sleeve is arranged on the side, located on the shoulder, of the bush body, a rear sleeve is arranged on the other side, located on the shoulder, of the bush body, the wall thickness of the front sleeve is smaller than that of the rear sleeve, and a transition table is arranged between the shoulder and the front sleeve; an oil injection hole is formed in the radial direction of the shoulder, a functional hole intersecting with the oil injection hole is formed in the axial direction of the shoulder, and the open end of the functional hole faces the transition table side; the inner wall of the bushing is provided with an inner groove corresponding to the oil injection hole; a functional part used for controlling opening and closing of the oil injection hole is installed in the functional hole and comprises a connecting section and a sealing section, the diameter of the sealing section is larger than that of the oil injection hole, the free end of the connecting section is immersed in the functional hole, and the part, crossing the oil injection hole, of the functional hole forms a blind hole section matched with the tail end of the sealing section. The oil injection hole is formed in the convex shoulder, and the functional part used for blocking the oil injection hole is arranged, so that operation is convenient, and use is easy.

Description

Technical Field

[0001] This invention belongs to the field of automotive parts technology, and in particular relates to a bearing sleeve for an automotive cooling water pump impeller hub. Background Technology

[0002] The working principle of an automotive water pump is to circulate coolant using centrifugal force to maintain a stable engine temperature and normal operation. The water pump mainly consists of a casing, impeller, bearings, and seals. The engine pulley drives the pump bearings and impeller to rotate. During rotation, the impeller generates centrifugal force, drawing coolant from the water tank and pushing it towards the radiator, thus achieving coolant circulation. Specifically, the working process of the water pump is as follows: When the engine is running, the pump impeller, under the action of centrifugal force, draws coolant from the water tank and pushes it towards the radiator. In the radiator, after the coolant dissipates heat, it is drawn back into the pump and circulates through the engine. This process repeats continuously until the engine cools to its normal operating temperature. Water pump impeller hubs require bearing sleeves during assembly. After prolonged use, lubricating oil needs to be added to the bearing sleeves for maintenance. Traditional bearing sleeves are difficult to lubricate. Although existing technologies include adding grease fittings or other auxiliary lubrication mechanisms, these additional structures or parts often protrude from the bearing surface, making them susceptible to damage and interference. For example, a water pump impeller hub bearing sleeve disclosed in Chinese patent CN218913243U not only has a short groove 103 that mates with the arc plate 4 that is difficult to machine, but the arc plate is also difficult to install. Furthermore, the magnetic pin 41 protrudes from the smooth surface 1, easily leading to the aforementioned damage or interference. Therefore, it is necessary to improve existing bearing sleeves. Summary of the Invention

[0003] In view of this, the present invention aims to overcome the defects in the prior art and proposes an impeller hub bearing sleeve for an automotive cooling water pump.

[0004] To achieve the above objectives, the technical solution created by this invention is implemented as follows:

[0005] A bearing sleeve for an automotive cooling water pump impeller hub is characterized by: a bushing and a shoulder on the outer wall of the bushing; a front sleeve on one side of the shoulder and a rear sleeve on the other side of the shoulder; the wall thickness of the front sleeve is less than that of the rear sleeve; a transition platform is provided between the shoulder and the front sleeve; an oil injection hole is provided radially along the shoulder, and a functional hole intersecting the oil injection hole is provided axially along the shoulder, with the open end of the functional hole facing the transition platform side; an outer countersunk platform is provided on the outer wall surface of the shoulder corresponding to the oil injection hole, and an inner groove is provided on the inner wall of the bushing corresponding to the oil injection hole; a functional component for controlling the opening and closing of the oil injection hole is installed in the functional hole, the functional component including a connecting section and a sealing section; the diameter of the sealing section is larger than the diameter of the oil injection hole; the free end of the connecting section is submerged in the functional hole; and the portion of the functional hole that extends beyond the oil injection hole forms a blind hole section that mates with the end of the sealing section.

[0006] Furthermore, the connecting section is provided with an external thread structure, and the functional hole is provided with an internal thread structure that mates with the connecting section.

[0007] Furthermore, the sealing section is cylindrical, and its diameter is the same as that of the blind hole section.

[0008] Furthermore, the outer sinking platform is a conical sinking platform.

[0009] Furthermore, the inner groove is a bowl-shaped groove.

[0010] Furthermore, the circumferential diameter of the transition platform is larger than that of the rear sleeve.

[0011] Furthermore, the free end of the sealing section is equipped with a cone-shaped structure.

[0012] Furthermore, the front sleeve, rear sleeve, shoulder, and transition platform are integrally formed.

[0013] Compared with existing technologies, the present invention has the following advantages:

[0014] This invention creates an oil injection hole on a shoulder and provides a functional component for sealing the oil injection hole. After loosening the functional component, the sealing section at the front end of the functional component releases the seal on the oil injection hole, allowing lubricating oil to be added. After the lubricating oil is added, the functional component is tightened to reseal the oil injection hole. It is convenient to operate and simple to use. The functional component does not protrude from the surface of the shoulder, so it will not be scratched or damaged, nor will it interfere with other structural components. Attached Figure Description

[0015] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0016] Figure 1 A schematic diagram of the structure created by this invention;

[0017] Figure 2 for Figure 1 A partial structural diagram of the oil injection hole section;

[0018] Figure 3 for Figure 1 A schematic diagram of the functional components;

[0019] Figure 4 for Figure 3 A schematic diagram after removing the functional components;

[0020] Figure 5 This is a schematic diagram of the functional components in this invention;

[0021] Figure 6 A three-dimensional structural schematic diagram created for this invention;

[0022] Figure 7 This is a schematic diagram of an embodiment of the present invention with a lubricating oil passage. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0024] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0025] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] The invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] A type of automotive coolant pump impeller hub bearing sleeve, such as Figures 1 to 6 As shown, the bushing includes a bushing and a shoulder 1 on the outer wall of the bushing. A front sleeve 2 is located on one side of the shoulder, and a rear sleeve 3 is located on the other side. The wall thickness of the front sleeve is less than that of the rear sleeve. A transition platform 4 is provided between the shoulder and the front sleeve. An oil injection hole 5 is provided radially along the shoulder, and a functional hole 6 intersecting the oil injection hole is provided axially along the shoulder. The open end of the functional hole faces the transition platform. The transition platform serves as a structural reinforcement, increasing the structural strength of the thinner front sleeve while ensuring the structural strength of the locations of the oil injection hole and functional hole. Since the oil injection hole and functional hole are located on the shoulder, this structural design does not actually affect the structural strength of the bushing.

[0028] An outer countersunk platform 7 is provided on the outer wall surface of the shoulder corresponding to the oil injection hole, and an inner groove 8 is provided on the inner wall of the bushing corresponding to the oil injection hole; a functional component 9 for controlling the opening and closing of the oil injection hole is installed in the functional hole. The functional component includes a connecting section 10 and a sealing section 11. The diameter of the sealing section is larger than the diameter of the oil injection hole. Under normal conditions, the functional component blocks the oil injection hole, and the free end of the connecting section is submerged in the functional hole. The functional component does not protrude from the surface of the shoulder, thus avoiding scratch damage and interference. The part of the functional hole that extends beyond the oil injection hole forms a blind hole section that matches the end of the sealing section.

[0029] The connecting section has an external thread structure, and the functional hole has an internal thread structure that mates with the connecting section. The sealing section is cylindrical, and its diameter is the same as that of the blind hole section. For example, the outer countersunk platform is a conical countersunk platform, and the inner groove is a bowl-shaped groove. The circumferential diameter of the transition platform is larger than that of the rear sleeve. The free end of the sealing section has a conical head structure 12. The aforementioned front sleeve, rear sleeve, shoulder, and transition platform are integrally machined structures.

[0030] It should be noted that the impeller hub bearing sleeve of the automotive coolant pump is not a vulnerable part. After the lubricating oil is added, as long as there is no large leakage, it will not affect the actual use effect. In fact, the lubricating oil is generally a paste-like grease. After the grease enters the bushing through the oil injection hole, it will disperse as the inner shaft of the bushing rotates. After the functional component in this invention is tightened, the sealing section will block the oil injection hole, ensuring that the lubricating oil will not leak out in large quantities from the oil injection hole. Therefore, the bushing can be used for a long time after one lubrication. Furthermore, even if there is a small gap between the sealing section and the oil injection hole, a small amount of lubricating oil leakage will not affect the lubrication effect.

[0031] In an optional embodiment, such as Figure 7As shown, the inner wall of the bushing is provided with cross-arranged lubricating oil channels 13. The oil injection hole is connected to the lubricating oil channel. When adding lubricating oil, the lubricating oil enters the lubricating oil channel through the oil injection hole. At the same time, the lubricating oil channel can also retain the lubricating oil in it, which can better achieve lubrication.

[0032] This invention creates an oil injection hole on a shoulder and provides a functional component for sealing the oil injection hole. After loosening the functional component, the sealing section at the front end of the functional component releases the seal on the oil injection hole, allowing lubricating oil to be added. After the lubricating oil is added, the functional component is tightened to reseal the oil injection hole. It is convenient to operate and simple to use. The functional component does not protrude from the surface of the shoulder, so it will not be scratched or damaged, nor will it interfere with other structural components.

[0033] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A bearing sleeve for an automotive cooling water pump impeller hub, characterized in that: The bushing includes a bushing and a shoulder on the outer wall of the bushing. A front sleeve is provided on one side of the shoulder, and a rear sleeve is provided on the other side of the shoulder. The wall thickness of the front sleeve is less than that of the rear sleeve. A transition platform is provided between the shoulder and the front sleeve. An oil injection hole is provided radially along the shoulder, and a functional hole is provided axially along the shoulder, intersecting with the oil injection hole. The open end of the functional hole faces the transition platform side. An outer countersunk platform is provided on the outer wall surface of the shoulder corresponding to the oil injection hole, and an inner groove is provided on the inner wall of the bushing corresponding to the oil injection hole. A functional component for controlling the opening and closing of the oil injection hole is installed in the functional hole. The functional component includes a connecting section and a sealing section. The diameter of the sealing section is larger than the diameter of the oil injection hole. The free end of the connecting section is submerged in the functional hole. The part of the functional hole that extends beyond the oil injection hole forms a blind hole section that mates with the end of the sealing section.

2. The automotive cooling water pump impeller hub bearing sleeve according to claim 1, characterized in that: The connecting section has an external thread structure, and the functional hole has an internal thread structure that mates with the connecting section.

3. The automotive cooling water pump impeller hub bearing sleeve according to claim 1, characterized in that: The sealing section is cylindrical, and its diameter is the same as that of the blind hole section.

4. The automotive cooling water pump impeller hub bearing sleeve according to claim 1, characterized in that: The outer sinking platform is a conical sinking platform.

5. The automotive cooling water pump impeller hub bearing sleeve according to claim 1, characterized in that: The inner groove is a bowl-shaped groove.

6. The automotive cooling water pump impeller hub bearing sleeve according to claim 1, characterized in that: The circumferential diameter of the transition platform is larger than that of the rear sleeve.

7. The automotive cooling water pump impeller hub bearing sleeve according to claim 1, characterized in that: The free end of the sealing section is equipped with a cone-shaped structure.

8. A bearing sleeve for an automotive cooling water pump impeller hub according to any one of claims 1 to 7, characterized in that: The front sleeve, rear sleeve, shoulder, and transition platform are integrally formed.

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