Sealed dustproof automobile hub bearing

Abstract

The utility model discloses a sealed dustproof automobile hub bearing. The sealed dustproof automobile hub bearing comprises a mounting flange plate, a hub flange plate and two groups of symmetrically arranged bearings, the outer end sealing assembly is composed of a fixed ring A and a follow-up ring A, the inner end sealing assembly is composed of a fixed ring B and a follow-up ring B, and sealing is achieved through labyrinth gap structures. The outer edges of the follow-up rings A and B are provided with the outwards-turned separation rings and the radial guide strips, dust and water are automatically thrown out through centrifugal force, and pollution accumulation is prevented. The fixing ring is made of wear-resistant rubber reinforced by a metal framework, so that stable assembly is ensured. The bearing has the characteristics of high-efficiency dust prevention, self-cleaning and long-acting sealing, the reliability and durability of the bearing are remarkably improved, and the bearing is suitable for meeting the requirement of high-performance automobile hubs.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of wheel hub bearing, specifically is a sealed dustproof automobile wheel hub bearing. BACKGROUND

[0002] With the rapid development of automobile industry, as the key component of vehicle running system, the sealing performance and durability of wheel hub bearing directly affect the safety and reliability of the whole vehicle. Traditional wheel hub bearing adopts single-sided or double-sided contact type sealing structure, such as rubber oil seal or metal cover plate sealing, which can prevent lubricating oil leakage and external contamination to a certain extent, but under complex working conditions (such as high-speed rotation, muddy environment, sand and stone impact, etc.), there are still problems such as sealing failure, lubricating grease loss and bearing wear, which leads to shortening of bearing life and even causes safety hazards.

[0003] In the prior art, part of the wheel hub bearing adopts labyrinth sealing structure, which blocks the pollutants through non-contact gap, but the dustproof and centrifugal drainage effect of traditional labyrinth sealing is limited, especially at high speed, dust and water are easy to accumulate in the sealing gap, which is difficult to completely drain, and long-term accumulation may damage the lubricating environment. In addition, the sealing assembly of traditional wheel hub bearing is made of single material (such as rubber or metal), which is easy to deform or wear under high temperature and high load working conditions, resulting in the decline of sealing performance. UTILITY MODEL CONTENTS

[0004] In view of the above deficiencies in the prior art, the utility model aims to provide a sealed dustproof automobile wheel hub bearing, which realizes the advantages of efficient dust prevention, automatic cleaning and stable sealing, significantly improves the reliability and durability of the wheel hub bearing, and is suitable for the high performance demand of modern automobile.

[0005] The utility model adopts the technical scheme of realizing the above-mentioned purpose: a sealed dustproof automobile wheel hub bearing, which comprises a mounting flange plate, a wheel hub flange plate and a bearing, the wheel hub flange plate is sleeved on the inner side of the mounting flange plate, and the bearing comprises two groups and is arranged in a symmetrical posture between the mounting flange plate and the wheel hub flange plate.

[0006] It also comprises an outer end sealing assembly and an inner end sealing assembly, the outer end sealing assembly comprises a fixed ring A and a follow-up ring A, the fixed ring A is nested and installed in the outer side port of the mounting flange plate, the follow-up ring A is fixedly assembled on the wheel hub flange plate and arranged on the outer side of the fixed ring A, the inner end sealing assembly comprises a fixed ring B and a follow-up ring B, the fixed ring A is nested and installed in the inner side port of the mounting flange plate, and the follow-up ring A is nested and installed on the wheel hub flange plate and arranged on the outer side of the fixed ring B.

[0007] The fixed ring A and the follow-up ring A, the fixed ring B and the follow-up ring B form a labyrinth gap, the outer edge of the follow-up ring A is provided with a separation ring A which is turned outward away from the fixed ring A, the separation ring A is fixedly connected with a radial guide strip A which is arranged in a ring array, the outer edge of the follow-up ring B is provided with a separation ring B which is turned outward away from the fixed ring B, and the separation ring B is fixedly connected with a radial guide strip B which is arranged in a ring array.

[0008] On the basis of the above technical scheme, in order to ensure that the fixed ring A and the follow-up ring A can be stably assembled at the outer side end of the mounting flange plate and the hub flange plate, the following technical scheme is provided.

[0009] An assembly ring groove A is formed in the inner wall of the outer end of the mounting flange plate, an assembly section A is arranged on the fixed ring A and is nested in the assembly ring groove A, and a metal framework A is filled in the assembly section A.

[0010] A positioning ring seat is fixedly connected to the hub flange plate, and a positioning ring is arranged on the inner edge of the follow-up ring A and is fixedly connected to the positioning ring seat.

[0011] On the basis of the above technical scheme, in order to ensure that the fixed ring A and the follow-up ring A cooperate to realize the labyrinth gap, the following technical scheme is provided.

[0012] Two groups of ring teeth A which are concentrically arranged are arranged on the side of the fixed ring A which faces the follow-up ring A, a ring groove A is arranged on the follow-up ring A, and the two groups of ring teeth A are arranged on the inner side of the ring groove A.

[0013] On the basis of the above technical scheme, in order to ensure that the fixed ring B and the follow-up ring B can be stably assembled at the outer side end of the mounting flange plate and the hub flange plate, the following technical scheme is provided.

[0014] An assembly ring groove B is formed in the inner wall of the inner end of the mounting flange plate, an assembly section B is arranged on the fixed ring B and is nested in the assembly ring groove B, and a metal framework B is filled in the assembly section B.

[0015] A positioning ring groove is formed in the outer wall of the inner end of the hub flange plate, a positioning section is arranged on the follow-up ring B and is nested in the positioning ring groove, and a metal framework b is filled in the positioning section.

[0016] On the basis of the above technical scheme, in order to ensure that the fixed ring B and the follow-up ring B cooperate to realize the labyrinth gap, the following technical scheme is provided.

[0017] Two groups of ring teeth B which are concentrically arranged are arranged on the side of the fixed ring B which faces the follow-up ring B, a ring groove B is arranged on the follow-up ring B, and the two groups of ring teeth B are arranged on the inner side of the ring groove B.

[0018] On the basis of the above technical solutions, in order to ensure that the fixed ring B can further seal the hub flange plate, the following technical solutions are provided.

[0019] The inner end outer wall of the hub flange plate is provided with a stepped groove arranged in the inner side of the positioning ring groove, and the fixed ring B is provided with a plurality of sealing lips arranged towards the stepped groove.

[0020] The beneficial effects of the utility model are as follows:

[0021] 1. The advantages of the outer end sealing assembly, the fixed ring A and the follow-up ring A cooperate to form a multi-stage labyrinth gap, and the capillary effect is used to block the invasion of external dust and water, and prevent internal lubricating grease from leaking. The outer edge of the follow-up ring A is provided with an outwardly turned separation ring A, and is provided with a radial guide strip A. When the hub rotates at high speed, the centrifugal force makes the dust and water droplets attached to the sealing assembly fly outward along the guide strip, avoiding the accumulation of pollutants and improving the sealing durability. The fixed ring A adopts a combination of a metal framework A and wear-resistant rubber to ensure that it is firmly embedded in the assembly groove A, avoiding loosening due to vibration or temperature changes; the follow-up ring A is installed by metal alloy interference fit, which enhances the structural strength and prevents deformation during high-speed rotation.

[0022] 2. The advantages of the inner end sealing assembly, the fixed ring B and the follow-up ring B form a labyrinth gap, and the sealing lip and stepped groove structure are additionally provided to further prevent internal lubricating grease from leaking, especially for high temperature and high speed working conditions. The separation ring B and the radial guide strip B of the follow-up ring B are designed to quickly discharge a small amount of water or dust entering the sealing area under the action of centrifugal force, avoiding long-term retention leading to lubrication failure. The fixed ring B and the follow-up ring B are made of wear-resistant rubber and metal framework, which can not only ensure the sealing fit, but also adapt to the slight deformation of the hub flange plate, improving the long-term sealing reliability. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The structure of the utility model is shown in the figure;

[0024] Figure 2 The enlarged detail view of part A is shown in the figure; Figure 1

[0025] Figure 3 The enlarged detail view of part B is shown in the figure; Figure 1

[0026] Figure 4 The detail view of the follow-up ring B is shown in the figure;

[0027] Figure 5 The detail view of the follow-up ring A is shown in the figure.

[0028] ​​In the figure: 1 mounting flange, 11 assembly ring groove A, 12 assembly ring groove B, 2 hub flange, 21 positioning ring seat, 22 positioning ring groove, 23 step groove, 3 bearing, 4 outer end sealing assembly, 41 fixed ring A, 411 assembly section A, 412 metal framework A, 413 ring tooth A, 42 follower ring A, 421 separation ring A, 422 radial guide strip A, 423 positioning ring, 424 ring groove A, 5 inner end sealing assembly, 51 fixed ring B, 511 assembly section B, 512 metal framework B, 513 ring tooth B, 514 sealing lip, 52 follower ring B, 521 separation ring B, 522 radial guide strip B, 523 positioning section, 524 metal framework b, 525 ring groove B. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model.

[0030] Please refer to Figures 1-5 A sealed dustproof automobile hub bearing, comprising a mounting flange 1, a hub flange 2 and a bearing 3, the hub flange 2 is sleeved on the inner side of the mounting flange 1, and the bearing 3 comprises two groups and is arranged in a symmetrical posture between the mounting flange 1 and the hub flange 2.

[0031] Further comprising an outer end sealing assembly 4 and an inner end sealing assembly 5, the outer end sealing assembly 4 comprises a fixed ring A 41 and a follower ring A 42, the fixed ring A 41 is nested and installed into the outer side port of the mounting flange 1, and the follower ring A 42 is fixedly assembled to the hub flange 2 and arranged on the outer side of the fixed ring A 41, the inner end sealing assembly 5 comprises a fixed ring B 51 and a follower ring B 52, the fixed ring A 41 is nested and installed into the inner side port of the mounting flange 1, and the follower ring A 42 is nested and installed to the hub flange 2 and arranged on the outer side of the fixed ring B 51.

[0032] The fixed ring A 41 and the follower ring A 42, the fixed ring B 51 and the follower ring B 52 all enclose a labyrinth gap, the outer edge of the follower ring A 42 is provided with a separation ring A 421 turned outward away from one side of the fixed ring A 41, the separation ring A 421 is fixedly connected with a radial guide strip A 422 arranged in a ring array, the outer edge of the follower ring B 52 is provided with a separation ring B 521 turned outward away from one side of the fixed ring B 51, and the separation ring B 521 is fixedly connected with a radial guide strip B 522 arranged in a ring array.

[0033] The bearing 3 adopts a tapered roller bearing, the outer ring seat of the bearing 3 is installed into the mounting flange 1, the positioning ring seat 21 is filled between the outer ring seats of the two groups of bearings 3 to realize accurate positioning of the outer ring seats of the two groups of bearings 3, and the inner ring seats of the two groups of bearings 3 are assembled to the hub flange 2 and kept in close layout.

[0034] The mounting flange plate 1 is used for connecting the suspension system of the automobile and is processed by the integrated pouring forming mode. In order to improve the convenience of the assembly of the tapered roller bearing, the hub flange plate 2 adopts the split type layout, that is, the flange plate for connecting the wheel rim is fixed by the after-mounted mode. For the hub flange plate 2 mounted on the driving wheel, the shaft center is also provided with the spline hole for connecting the driving half shaft.

[0035] For the outer end sealing assembly 4 and the inner end sealing assembly 5, the fixed ring A41 and the fixed ring B51 are assembled to the mounting flange plate 1 in the relative static state and cooperate with the follower ring A42 and the follower ring B52 (synchronously operated with the hub flange plate 2) mounted on the hub flange plate 2. The labyrinth gap of the stroke can block the leakage of the hub bearing internal lubricating oil (lubricating grease) to the outside and can also block the entry of the external dust and rainwater into the hub bearing.

[0036] In the operation process of the follower ring A42 and the follower ring B52 with the hub flange plate 2, the centrifugal force generated can make the dust and rainwater attached to the outer edge of the follower ring A42 and the follower ring B52 fly outward, achieving the effect of automatically cleaning the dust and water.

[0037] Specifically, the outwardly designed separation ring A421 and the separation ring B521 can provide a guiding effect for the dust and rainwater to fly outward, and the radial guide strip A422 and the radial guide strip B522 can provide a force for the dust and rainwater on the separation ring A421 or the separation ring B521 to keep the same speed as the follower ring A42 and the follower ring B52, so that the dust and rainwater have enough centrifugal force to fly outward.

[0038] In order to ensure that the fixed ring A41 and the follower ring A42 can be stably assembled on the outside of the mounting flange plate 1 and the hub flange plate 2 respectively, the following technical solutions are provided.

[0039] The outer end inner wall of the mounting flange plate 1 is provided with an assembly ring groove A11, the fixed ring A41 is provided with an assembly section A411 nested and mounted in the assembly ring groove A11, and the assembly section A411 is filled with a metal framework A412. The hub flange plate 2 is fixedly connected with a positioning ring seat 21, and the inner edge of the follower ring A42 is provided with a positioning ring 423 fixedly mounted in the positioning ring seat 21.

[0040] The main body of the fixed ring A41 is processed by using wear-resistant rubber material, the assembly section A411 can be deformed, and the metal framework A412 is stably assembled into the assembly ring groove A11.

[0041] The follow-up ring A42 is made of wear-resistant metal alloy, the inner wall of the positioning ring seat 21 is inclined at an angle of 0.5-1.5°, the positioning ring 423 is perfectly matched with the inner wall of the positioning ring seat 21, and the interference fit of the two is realized by heating the hub flange plate 2 and cooling the follow-up ring.

[0042] In order to ensure that the fixed ring A41 and the follow-up ring A42 cooperate to realize the labyrinth gap, the following technical solutions are provided.

[0043] The fixed ring A41 is provided with two groups of concentrically arranged ring teeth A413 on the side facing the follow-up ring A42, the follow-up ring A42 is provided with a ring groove A424, and the two groups of ring teeth A413 are arranged on the inner side of the ring groove A424.

[0044] The cooperation of the ring teeth A413 and the ring groove A424 can form a labyrinth gap, and the dust and water outside and the lubricating oil (lubricating grease) inside will be affected by the capillary effect when entering here, thereby hindering further diffusion.

[0045] In order to ensure that the fixed ring B51 and the follow-up ring B52 can be stably assembled on the outer end of the mounting flange plate 1 and the hub flange plate 2 respectively, the following technical solutions are provided.

[0046] The mounting flange plate 1 is provided with an assembly ring groove B12 at the inner end of the inner wall, the fixed ring B51 is provided with an assembly section B511 nested and assembled into the assembly ring groove B12, and the assembly section B511 is filled with a metal framework B512.

[0047] The hub flange plate 2 is provided with a positioning ring groove 22 at the outer wall of the inner end, the follow-up ring B52 is provided with a positioning section 523 nested and assembled into the positioning ring groove 22, and the positioning section 523 is filled with a metal framework b524.

[0048] The fixed ring B51 and the follow-up ring B52 are both made of wear-resistant rubber material, the assembly section B511 and the positioning section 523 can be deformed, and the metal framework B512 and the metal framework b524 are stably assembled into the assembly ring groove B12 and the positioning ring groove 22.

[0049] In order to ensure that the fixed ring B51 and the follow-up ring B52 cooperate to realize the labyrinth gap, the following technical solutions are provided.

[0050] The fixed ring B51 is provided with two groups of concentrically arranged ring teeth B513 on the side facing the follow-up ring B52, the follow-up ring B52 is provided with a ring groove B525, and the two groups of ring teeth B513 are arranged on the inner side of the ring groove B525.

[0051] The cooperation of the ring teeth B513 and the ring grooves B525 can form a labyrinth gap, and the external dust, accumulated water and internal lubricating oil (lubricating grease) entering this place will be affected by capillary action, hindering further diffusion.

[0052] To ensure that the fixing ring B51 can further seal the hub flange plate 2, the following technical solutions are provided.

[0053] The inner end outer wall of the hub flange plate 2 is provided with a stepped groove 23 arranged inside the positioning ring groove 22, and the fixing ring B51 is provided with a plurality of sealing lips 514 arranged towards the stepped groove 23.

[0054] The sealing lip 514 and the stepped groove 23 can also form a labyrinth gap, and since it is arranged inside the follower ring B52, it mainly plays a role in preventing internal lubricating grease leakage.

[0055] It is obvious to those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0056] In addition, it should be understood that although the present application is described in the specification in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A sealed dustproof automobile hub bearing, comprising a mounting flange (1), a hub flange (2), and a bearing (3), the hub flange (2) is sleeved on the inner side of the mounting flange (1), and the bearing (3) is arranged between the mounting flange (1) and the hub flange (2) in a symmetrical manner; characterized in that It also comprises an outer end sealing assembly (4) and an inner end sealing assembly (5), the outer end sealing assembly (4) comprises a fixed ring A (41) and a follower ring A (42), the fixed ring A (41) is nested and mounted into the outer side port of the mounting flange (1), and the follower ring A (42) is fixedly assembled to the hub flange (2) and arranged outside the fixed ring A (41), the inner end sealing assembly (5) comprises a fixed ring B (51) and a follower ring B (52), the fixed ring A (41) is nested and mounted into the inner side port of the mounting flange (1), and the follower ring A (42) is nested and mounted into the hub flange (2) and arranged outside the fixed ring B (51) ; The fixed ring A (41) and the follower ring A (42), the fixed ring B (51) and the follower ring B (52) are all enclosed into a labyrinth gap, the outer edge of the follower ring A (42) is provided with a separation ring A (421) which is turned outward away from one side of the fixed ring A (41), the separation ring A (421) is fixedly connected with a radial guide strip A (422) which is arranged in a ring array, the outer edge of the follower ring B (52) is provided with a separation ring B (521) which is turned outward away from one side of the fixed ring B (51), and the separation ring B (521) is fixedly connected with a radial guide strip B (522) which is arranged in a ring array.

2. A sealed dustproof automotive hub bearing according to claim 1, characterized in that: An assembly ring groove A (11) is formed at the outer end inner wall of the mounting flange (1), an assembly section A (411) is arranged on the fixed ring A (41) and nested and mounted into the assembly ring groove A (11), and a metal framework A (412) is filled in the assembly section A (411) ; A positioning ring seat (21) is fixedly connected to the hub flange (2), and a positioning ring (423) is fixedly mounted into the positioning ring seat (21) at the inner edge of the follower ring A (42).

3. A sealed dustproof automotive hub bearing according to claim 1, wherein: Two groups of ring teeth A (413) are arranged in a concentric manner on one side of the fixed ring A (41) facing the follower ring A (42), and a ring groove A (424) is arranged on the follower ring A (42), and the two groups of ring teeth A (413) are arranged inside the ring groove A (424).

4. The sealed dustproof automotive hub bearing of claim 1, wherein: An assembly ring groove B (12) is formed at the inner end inner wall of the mounting flange (1), an assembly section B (511) is arranged on the fixed ring B (51) and nested and mounted into the assembly ring groove B (12), and a metal framework B (512) is filled in the assembly section B (511) ; A positioning ring groove (22) is formed at the inner end outer wall of the hub flange (2), a positioning section (523) is arranged on the follower ring B (52) and nested and mounted into the positioning ring groove (22), and a metal framework b (524) is filled in the positioning section (523).

5. The sealed dustproof automotive hub bearing of claim 1, wherein: The fixed ring B (51) is provided with two groups of concentric ring teeth B (513) on the side facing the follow-up ring B (52), and the follow-up ring B (52) is provided with a ring groove B (525), and the two groups of ring teeth B (513) are arranged on the inner side of the ring groove B (525).

6. A sealed dustproof automotive hub bearing according to claim 4, wherein: The inner end outer wall of the hub flange plate (2) is provided with a step groove (23) arranged in the inner side of the positioning ring groove (22), and the fixed ring B (51) is provided with a plurality of sealing lips (514) arranged towards the step groove (23).

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