Heat dissipation hub bearing of automobile

Abstract

The utility model relates to the technical field of automobile hub bearings, and discloses an automobile heat dissipation hub bearing which comprises an inner ring and an outer cylinder, one end of the inner ring is fixedly connected with an inner flange plate, and ventilation filter holes are formed in the surface of the inner flange plate. According to the automobile heat dissipation hub bearing, through the matched design of the inner flange plate and the ventilation filter holes, a multidirectional airflow channel is formed in combination with the ventilation grooves in the connecting position of the outer sliding sleeve and the outer cylinder, and active heat dissipation and uniform heat distribution in the bearing running process are achieved. The sleeved connection structure of the inner sliding rail and the outer sliding sleeve reduces friction resistance through the coupling effect of the balls and the annular grooves, and the radial supporting layout of the fan-shaped reinforcing ribs is matched, so that the torsional rigidity and the load transmission efficiency of the bearing are remarkably improved. On the basis, detachable protection of the dustproof net is achieved through a bolt fixing structure for installing an inner ring and a limiting convex ring, and the ventilation grooves and ventilation filter holes are effectively prevented from being blocked by impurities in combination with a dynamic attaching cleaning mechanism of a dust removal brush at the end of the outer barrel.

Description

Technical Field

[0001] This utility model relates to the field of automotive wheel hub bearing technology, specifically an automotive heat dissipation wheel hub bearing. Background Technology

[0002] In the field of automotive wheel bearings, traditional bearing structures generally suffer from low heat dissipation efficiency, high frictional losses, and insufficient environmental tolerance. Existing technologies often employ enclosed ball bearing designs, relying on passive heat dissipation through the thermal conduction of the metal materials. Under high-speed, heavy-load conditions, heat accumulation easily occurs, leading to grease deterioration and raceway deformation. Some improvements attempt to enhance airflow by adding ventilation holes to the flange, but these do not solve the problems of dust intrusion and blockage of heat dissipation channels. Furthermore, the lack of an effective dynamic sealing mechanism exacerbates the risk of impurities entering the raceway and causing abnormal wear.

[0003] Furthermore, traditional bearings typically employ fixed sealing rings for dust protection, requiring complete disassembly of the bearing assembly for maintenance and replacement, significantly increasing repair costs. Regarding structural reinforcement, existing technologies usually increase rigidity by thickening the walls, but this leads to increased weight and reduces heat dissipation efficiency. The connection between the outer cylinder and inner ring is prone to fatigue cracks due to stress concentration. While some solutions propose incorporating heat dissipation fins inside the bearing, the lack of coordinated design between the airflow channels and rotating components makes it difficult to achieve continuous and effective air convection.

[0004] Therefore, it is necessary to propose a type of automotive cooling wheel hub bearing. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides an automotive cooling wheel hub bearing that features active heat dissipation, self-cleaning protection, and a lightweight reinforced structure, thus solving the problems mentioned in the background art.

[0006] This utility model provides the following technical solution: an automotive cooling wheel hub bearing, comprising an inner ring and an outer cylinder, an inner flange fixedly connected to one end of the inner ring, ventilation filter holes provided on the surface of the inner flange, an outer cylinder sleeved on the surface of the inner ring, an outer flange fixedly connected to one end of the outer cylinder, an inner slide rail fixedly connected to the surface of the inner ring, and an outer sliding sleeve fixedly connected to the inner wall of the outer cylinder, the outer sliding sleeve being rotatably sleeved on the surface of the inner slide rail.

[0007] Preferably, the inner slide rail has an annular groove on its side, and the outer slide sleeve has a plurality of balls movably embedded inside. The plurality of balls are arranged circumferentially about the inner wall of the outer slide sleeve. The balls fit into the annular groove on the side of the inner slide rail. The surface of the balls is coated with titanium nitride, the coefficient of friction is ≤0.05, and the radius of curvature of the annular groove is 1.05-1.1 times the diameter of the balls.

[0008] Preferably, a plurality of ventilation grooves are provided at the connection between the outer sliding sleeve and the inner wall of the outer cylinder, and the ventilation grooves penetrate the outer sliding sleeve to form an air duct inside the outer cylinder.

[0009] Preferably, a fan-shaped reinforcing rib is fixedly connected to the side of the outer sleeve, and the other side surface of the fan-shaped reinforcing rib is fixedly connected to the inner wall of the outer cylinder.

[0010] Preferably, a limiting protrusion ring is fixedly connected to the end of the inner ring away from the inner flange and an installation inner ring is sleeved on it. The installation inner ring is fixedly connected to the limiting protrusion ring by bolts. A dustproof net is fixedly connected to the side of the installation inner ring. The dustproof net is in communication with the ventilation groove and the ventilation filter hole.

[0011] Preferably, two cleaning brushes are fixedly installed at one end of the outer cylinder, and the sides of the cleaning brushes are in contact with the surface of the dustproof mesh.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This type of automotive cooling wheel hub bearing utilizes a design that combines an inner flange with ventilation holes, along with a ventilated groove at the connection between the outer sleeve and the outer cylinder, to create a multi-directional airflow channel, achieving active heat dissipation and uniform heat distribution during bearing operation. The sleeve structure between the inner slide rail and the outer slide sleeve reduces frictional resistance through the coupling effect of balls and annular grooves. Combined with the radial support layout of fan-shaped reinforcing ribs, this significantly improves the bearing's torsional stiffness and load transfer efficiency. Furthermore, the dust filter is removable and secured by bolts to the inner ring and the limiting convex ring. Combined with the dynamic contact cleaning mechanism of the cleaning brush at the end of the outer cylinder, this effectively prevents impurities from clogging the ventilation grooves and ventilated holes. The overall structure features a modular, split design to optimize maintenance convenience, while the enclosed track and air duct design ensures both lubrication medium sealing, stress dispersion efficiency, and continuous heat dissipation stability. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Fig. 1 This is a schematic diagram of the overall structure of the device of this utility model;

[0016] Fig. 2 This is a schematic diagram of the inner ring structure of this utility model;

[0017] Fig. 3 This is a cross-sectional view of the outer cylinder of this utility model.

[0018] The attached diagram lists the components represented by each number as follows:

[0019] 100. Inner ring; 101. Inner flange; 102. Inner slide rail; 103. Limiting ring; 104. Ventilation filter hole;

[0020] 200. Outer cylinder; 201. Outer flange;

[0021] 300. Outer sleeve; 301. Ball bearing; 302. Ventilation groove; 303. Fan-shaped reinforcing rib;

[0022] 400. Install the inner ring; 401. Bolts; 402. Dustproof net;

[0023] 500. Dust removal brush. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not 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 effort are within the protection scope of the present utility model.

[0025] Reference Figs. 1-3 As shown, an automotive cooling wheel hub bearing includes an inner ring 100 and an outer cylinder 200. An inner flange 101 is fixedly connected to one end of the inner ring 100, and ventilation holes 104 are provided on the surface of the inner flange 101. The outer cylinder 200 is fitted onto the surface of the inner ring 100, and an outer flange 201 is fixedly connected to one end of the outer cylinder 200. An inner slide rail 102 is fixedly connected to the surface of the inner ring 100, and an outer sliding sleeve 300 is fixedly connected to the inner wall of the outer cylinder 200. The outer sliding sleeve 300 rotatably fits onto the surface of the inner slide rail 102. Through the cooperative design of the inner flange 101 and the ventilation holes 104, active airflow exchange is achieved during bearing operation. The sleeve structure of the inner slide rail 102 and the outer sliding sleeve 300 improves the overall rotational stability of the bearing. The modular design of the inner ring 100 and the outer cylinder 200 facilitates maintenance, disassembly, and integration with the cooling system.

[0026] In a further preferred embodiment, the inner slide rail 102 has an annular groove on its side, and the outer slide sleeve 300 has a plurality of balls 301 movably embedded inside. The balls 301 are arranged circumferentially about the inner wall of the outer slide sleeve 300, and the balls 301 fit into the annular groove on the side of the inner slide rail 102. The surface of the balls 301 is coated with titanium nitride, and the coefficient of friction is ≤0.05. The radius of curvature of the annular groove is 1.05-1.1 times the diameter of the balls. The coupling effect between the balls 301 and the annular groove of the inner slide rail 102 effectively reduces frictional resistance. The multi-point contact layout of the balls 301 in the outer slide sleeve 300 achieves uniform load distribution, and the closed track design prevents the lubricating medium from leaking out from the gap between the inner slide rail 102 and the outer slide sleeve 300.

[0027] In a further preferred embodiment, a plurality of ventilation slots 302 are provided at the connection between the outer sliding sleeve 300 and the inner wall of the outer cylinder 200. The ventilation slots 302 penetrate the outer sliding sleeve 300 and form air ducts inside the outer cylinder 200. The ventilation slots 302 at the connection between the outer sliding sleeve 300 and the outer cylinder 200 form a continuous heat dissipation channel. The multi-directional airflow channel avoids local heat accumulation inside the outer cylinder 200. The slot structure of the ventilation slots 302 has both heat dissipation and stress dispersion functions.

[0028] In a further preferred embodiment, a fan-shaped reinforcing rib 303 is fixedly connected to the side of the outer sleeve 300, and the other side surface of the fan-shaped reinforcing rib 303 is fixedly connected to the inner wall of the outer cylinder 200. The fixed connection between the fan-shaped reinforcing rib 303 and the inner wall of the outer cylinder 200 improves the torsional stiffness of the structure, the radial support layout on the side of the outer sleeve 300 optimizes the load transfer path, and the airflow gaps maintained between the fan-shaped reinforcing ribs 303 maintain the heat dissipation efficiency of the outer cylinder 200.

[0029] In a further preferred embodiment, a limiting protrusion ring 103 is fixedly connected to the end of the inner ring 100 away from the inner flange 101, and an installation inner ring 400 is sleeved thereon. The installation inner ring 400 is fixedly connected to the limiting protrusion ring 103 by bolts 401. A dustproof net 402 is fixedly connected to the side of the installation inner ring 400, and the dustproof net 402 is in communication with the ventilation channel 302 and the ventilation filter hole 104. The installation inner ring 400 is fixed to the limiting protrusion ring 103 by bolts 401 to enable quick installation and removal of the dustproof net 402. The dustproof net 402 filters impurities in the through area of ​​the ventilation channel 302 and the ventilation filter hole 104. The multi-layer protective structure ensures a clean environment between the inner ring 100 and the outer cylinder 200.

[0030] Preferably, two cleaning brushes 500 are fixedly installed at one end of the outer cylinder 200, and the sides of the cleaning brushes 500 are in contact with the surface of the dustproof net 402. The cleaning brushes 500 at the end of the outer cylinder 200 dynamically contact the surface of the dustproof net 402 to achieve self-cleaning. The contact cleaning mechanism avoids clogging of the pores of the dustproof net 402, and the continuous scraping action of the cleaning brushes 500 adapts to the needs of different speed operating conditions.

[0031] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automotive heat dissipation wheel hub bearing, comprising an inner ring (100) and an outer cylinder (200), characterized in that: An inner flange (101) is fixedly connected to one end of the inner ring (100). Ventilation filter holes (104) are provided on the surface of the inner flange (101). An outer cylinder (200) is fitted onto the surface of the inner ring (100). An outer flange (201) is fixedly connected to one end of the outer cylinder (200). An inner slide rail (102) is fixedly connected to the surface of the inner ring (100). An outer sliding sleeve (300) is fixedly connected to the inner wall of the outer cylinder (200). The outer sliding sleeve (300) is rotatably fitted onto the surface of the inner slide rail (102).

2. The automotive cooling wheel hub bearing according to claim 1, characterized in that: The inner slide rail (102) has an annular groove on its side. The outer slide sleeve (300) has several balls (301) movably embedded inside. The balls (301) are arranged circumferentially about the inner wall of the outer slide sleeve (300). The balls (301) fit into the annular groove on the side of the inner slide rail (102). The surface of the balls (301) is coated with titanium nitride, and the coefficient of friction is ≤0.

05. The radius of curvature of the annular groove is 1.05-1.1 times the diameter of the balls.

3. The automotive cooling wheel hub bearing according to claim 1, characterized in that: Several ventilation slots (302) are provided at the connection between the outer sliding sleeve (300) and the inner wall of the outer cylinder (200). The ventilation slots (302) penetrate the outer sliding sleeve (300) and form an air duct inside the outer cylinder (200).

4. The automotive cooling wheel hub bearing according to claim 3, characterized in that: The outer sleeve (300) is fixedly connected to a fan-shaped reinforcing rib (303) on its side, and the other side surface of the fan-shaped reinforcing rib (303) is fixedly connected to the inner wall of the outer cylinder (200).

5. The automotive cooling wheel hub bearing according to claim 3, characterized in that: A limiting protrusion ring (103) is fixedly connected to the end of the inner ring (100) away from the inner flange (101), and an installation inner ring (400) is sleeved on it. The installation inner ring (400) is fixedly connected to the limiting protrusion ring (103) by bolts (401). A dustproof net (402) is fixedly connected to the side of the installation inner ring (400). The dustproof net (402) is in communication with the ventilation groove (302) and the ventilation filter hole (104).

6. The automotive cooling wheel hub bearing according to claim 1, characterized in that: Two cleaning brushes (500) are fixedly installed at one end of the outer cylinder (200), and the side of the cleaning brushes (500) is in contact with the surface of the dustproof net (402).

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