CN219327662U

CN219327662U - Sealing structure for automobile water pump bearing

Info

Publication number: CN219327662U
Application number: CN202320680007.7U
Authority: CN
Inventors: 陈祖荣
Original assignee: Hangzhou Ideal Sealing Technology Co ltd
Current assignee: Hangzhou Ideal Sealing Technology Co ltd
Priority date: 2023-03-28
Filing date: 2023-03-28
Publication date: 2023-07-11
Anticipated expiration: 2033-03-28

Abstract

The utility model discloses an automobile water pump bearing sealing structure, which comprises an inner sealing ring and an outer sealing ring; the inner sealing ring comprises a first bracket and a first sealing body arranged on the first bracket; the first sealing body comprises a first lip and a second lip which are respectively sleeved at two ends of the first bracket; the first lip comprises a first sealing lip radially abutting against the inner wall of the other side of the annular channel; the second lip is clamped in the groove of the bearing; the outer sealing ring is arranged at the top end of the shaft body and covers the inner sealing ring, a second sealing lip extending outwards is arranged at the root of the first sealing lip, and the second sealing lip axially abuts against the bottom of the outer sealing ring. On the basis of radial sealing, the utility model forms an axially abutting sealing environment between the inner sealing ring and the outer sealing ring through an inner and outer layered design, and has the advantages of simple structure, strong sealing performance and long sealing service life.

Description

Sealing structure for automobile water pump bearing

Technical Field

The utility model relates to the technical field of bearing sealing, in particular to an automobile water pump bearing sealing structure.

Background

The automobile water pump bearing is an important part in an automobile cooling water pump system, has a severe working environment, is always in a high-temperature and high-speed running state and works under the action of radial centrifugal force and torsional force of axial impact and high-speed rotation, and is required to be sealed in order to prevent oil inside the bearing from overflowing and water vapor outside the bearing from penetrating into the bearing.

In recent years, as the performance of an engine used in a water pump is improved, the requirement for the sealing performance of the bearing is increasingly increased, and the reliability and durability of the sealing of the bearing directly affect the service performance of the bearing, so that the effective improvement of the sealing performance of the bearing is a premise and a key for improving the performance of the bearing.

The conventional water pump bearing is usually provided with a contact rubber lip type sealing ring (shown in fig. 1) at the end face of the bearing for sealing, the sealing ring is mostly made of rubber materials wrapped outside a rigid framework, and the inner and outer environments of the bearing are isolated by tightly matching through embedding the outer lip of the sealing ring into a groove of the outer ring of the bearing and radially abutting against the inner ring of the bearing by means of the inner lip of the sealing ring. According to the technical scheme, axial contact is taken as a main part, gap dust prevention is taken as an auxiliary part, although sealing can be realized, radial pressure born by the inner lip of the sealing ring is larger during working, friction heat generation is generated during bearing rotation, so that bearing temperature rise is too high, the inner lip is in direct contact with the inner ring of the bearing, the inner lip is easy to age and wear, and further, when complex road conditions and the bearing are subjected to severe vibration, gaps are easy to be generated between the inner lip and the inner ring of the bearing, sealing effect is lost, and external muddy water and dust enter the bearing.

In this regard, the sealing life of the sealing ring is mostly improved in industry by adding radial sealing points. In the single-cover waterproof transmission shaft bearing sealing ring disclosed by the utility model with the current publication number of CN217002722U, the inner lip is provided with an upper waterproof tooth and a lower waterproof tooth, and the upper waterproof tooth and the lower waterproof tooth are radially abutted against the inner ring of the bearing in a layering manner during working, so that the radial abutting of the inner lip is changed into the radial abutting of the upper layer and the lower layer from the original single-layer radial abutting, and the sealing service life is longer.

Disclosure of Invention

In order to solve the technical problems that an inner lip of an existing bearing sealing ring is easy to age and wear and is poor in water resistance and dust resistance under complex road conditions, the utility model aims to provide an automobile water pump bearing sealing structure.

In order to solve the technical problems, the utility model is realized by the following technical scheme:

the bearing comprises an annular channel formed by an inner ring and an outer ring of the bearing; a groove is formed in the inner wall of one side of the top end of the annular channel, and the sealing structure comprises an inner sealing ring and an outer sealing ring; the inner sealing ring comprises a first bracket and a first sealing body arranged on the first bracket; the first sealing body comprises a first lip and a second lip which are respectively sleeved at two ends of the first bracket; the first lip comprises a first sealing lip radially abutting against the inner wall of the other side of the annular channel; the second lip is clamped in the groove; the outer sealing ring is arranged at the top end of the shaft body and covers the inner sealing ring, a second sealing lip extending outwards is arranged at the root of the first sealing lip, and the second sealing lip axially abuts against the bottom of the outer sealing ring.

Through above-mentioned scheme, the vertical annular channel that sets up from top to bottom in the bearing of interior sealing washer and outer sealing washer is on the radial butt bearing of first sealing lip of interior sealing washer carries out radial seal's basis, by the second sealing lip axial butt outer sealing washer on the interior sealing washer, by second sealing lip and outer sealing washer contact formation axial indirect seal, compare in the mode that the radial sealing point was add to prior art, form axial butt seal between second sealing lip and the outer sealing washer, can not produce friction and heating up contact, can continue to block outside muddy water, dust entering bearing inside after the ageing wearing and tearing of first sealing lip, improve the life of bearing greatly.

Preferably, the angle between the second sealing lip and the first support is 30 ° -60 °, and in consideration of the fact that the angle between the second sealing lip and the first support is too small, the abutting effect of the outer sealing ring against the second sealing lip after press mounting is not obvious, and when the angle is too large, the resistance of the second sealing lip abutting against the outer sealing ring is large, fatigue is easy to be caused, and the service life is short, so that the angle between the second sealing lip and the first support is preferably the value described above.

Further, the outer sealing ring comprises a second support and a second sealing body arranged on the second support, the second support comprises an abutting portion and a connecting portion vertically connected with the abutting portion, the abutting portion is parallel to the axis of the bearing and in interference abutting connection with the inner wall of the annular channel, and the second sealing body is sleeved on the connecting portion and in abutting connection with the inner wall of the other side of the annular channel.

Through above-mentioned scheme, during the actual installation, only need through the punching press can be with outer sealing washer axial fixity in the annular channel, need not to additionally set up the recess on the bearing, simple structure is reliable.

Further, a shoulder is formed by radial extension of the bottom surface of the groove, a protruding surface is formed at the top end of the groove, the second lip comprises a hook body, the bottom end of the hook body is abutted downwards to the shoulder, and the hook body stretches into the groove and is abutted upwards to the protruding surface.

Through above-mentioned scheme, the hook body butt recess simultaneously's top and bottom realize the two-way support of interior sealing washer in axial, can effectively prevent that interior sealing washer from taking place axial displacement in the bearing, make second seal lip and outer sealing washer can keep contacting constantly, improve the leakproofness.

Further, a third sealing lip extends outwards from the root of the hook body, and the third sealing lip radially abuts against the inner wall of the annular channel.

Through above-mentioned scheme, on the basis that the coupler body and recess formed axial support, radially the butt annular channel inner wall by the third seal lip again, the first lip of cooperation originally realizes the radial support of annular to the inner seal circle, and radial support intensity is higher, and dustproof effect is better.

Further, the materials of the first bracket and the second bracket are rigid materials.

Further, the materials of the first sealing body and the second sealing body are rubber.

Drawings

FIG. 1 is a schematic cross-sectional view of a prior art bearing seal ring;

FIG. 2 is a schematic perspective view of the present utility model assembled on a bearing;

FIG. 3 is a schematic perspective view of the present utility model;

FIG. 4 is a schematic view of a front cross-sectional structure of the present utility model;

fig. 5 is a schematic perspective view of a first sealing body according to the present utility model:

reference numerals: 1. a bearing inner ring; 2. a bearing outer ring; 3. an annular channel; 4. a groove; 41. a shoulder; 42. a protruding surface; 5. a first bracket; 51. a first support portion; 52. a second supporting part; 6. a first sealing body; 61. a first lip; 611. a first sealing lip; 612. a second sealing lip; 62. a second lip; 621. a hook body; 622. a third sealing lip; 7. a second bracket; 71. an abutting portion; 72. a connection part; 8. and a second sealing body.

Detailed Description

Reference will now be made in detail to embodiments of the present utility model, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The utility model is described in further detail below with reference to the accompanying drawings:

the specific implementation mode of the utility model is as follows:

as shown in fig. 1 to 5, an automotive water pump bearing comprises a bearing inner ring 1 and a bearing outer ring 2, wherein an annular channel 3 is formed between the bearing inner ring 1 and the bearing outer ring 2, a plurality of rolling bodies (not shown in the drawings) are arranged in the annular channel 3, and the top end of the annular channel 3 is sealed through a sealing structure.

A groove 4 is formed in an inner wall of one side of the top end of the annular channel 3, in this embodiment, the groove 4 is formed on an inner diameter surface of the bearing outer ring 2, and correspondingly, may also be formed on an outer diameter surface of the bearing inner ring 1. Based on the above-mentioned recess 4 setting position, seal structure includes interior sealing washer and outer sealing washer, and interior sealing washer and outer sealing washer are from inside to outside connected in the top of annular channel 3 along bearing axis direction, seal the bearing inside. The inner sealing ring mainly comprises a first support 5 and a first sealing body 6 arranged on the first support 5, the first sealing body 6 comprises a first lip 61 and a second lip 62 which are sleeved at two ends of a first supporting portion 51, the first lip 61 comprises a first sealing lip 611 which is radially abutted against the inner wall of the bearing inner ring 1, the second lip 62 is clamped in the groove 4, a second sealing lip 612 which extends outwards is arranged at the root of the first sealing lip 611, and the second sealing lip 612 is axially abutted against the bottom of the outer sealing ring.

Based on the above technical scheme, can seal the bearing in the internal seal circle, cover the second seal lip 612 of internal seal circle and axial butt internal seal circle from outside to inside by outer seal circle, and then form new sealing environment in the external portion of internal seal circle, after the ageing wearing and tearing of first seal lip 611 lose sealed effect, still can be through the axial butt external seal circle of second seal lip 612, effectively prevent outside muddy water, dust entering the bearing inside through the clearance between first seal lip 611 and the annular channel 3 inner wall, and then improve the life of bearing by a wide margin.

The outer sealing ring comprises a second support 7 and a second sealing body 8 arranged on the second support 7, the second support 7 comprises an abutting part 71 and a connecting part 72 vertically connected with the abutting part 71, the abutting part 71 is parallel to the axis of the bearing and is in interference abutting joint with the outer diameter surface of the bearing inner ring 1, and the second sealing body 8 is sleeved on the connecting part 72 and is in radial abutting joint with the inner diameter surface of the bearing outer ring 2. Based on the above scheme, during processing, can locate the external diameter of bearing inner race 1 with butt portion 71 through punching press technology interference cover, need not to additionally set up recess 4 and install outer sealing washer on the bearing, simplify bearing structure and can realize reliable connection.

In this embodiment, the first bracket 5 and the second bracket 7 mainly have rigid supporting function, and the materials thereof may be rigid materials such as metal and ceramic, and the first sealing body 6 and the second sealing body 8 may be rubber materials such as nitrile rubber, fluororubber, silicone rubber and polypropylene rubber, preferably nitrile rubber with heat resistance, high ductility and corrosion resistance for high temperature, high rotation and vibration environments of the automobile water pump.

Further, it is considered that when the angle between the second seal lip 612 and the first bracket 5 is too small, the degree of deformation of the second seal lip 612 is insufficient after the press mounting of the outer seal ring, which may result in insufficient sealing effect, and when the angle is too large, the pressure applied to the second seal ring against the outer seal ring is large, the degree of deformation of the second seal ring is large, fatigue is easily caused, and plastic deformation is easily caused, resulting in sealing failure, so that the angle between the second seal lip 612 and the first bracket 5 is preferably 30 ° to 60 °.

Further, a shoulder 41 is formed at the bottom of the groove 4 and extends radially towards the bearing inner ring 1, a protruding surface 42 is formed at the top end of the groove 4 and radially, the second lip 62 includes a hook 621, the bottom end of the hook 621 correspondingly abuts against the shoulder 41, and the top end of the hook 621 extends into the groove 4 and abuts against the protruding surface 42. During operation, the hook 621 vertically abuts against the groove 4 vertically and axially, so that the axial bidirectional support of the inner sealing ring is realized, the inner sealing ring is effectively prevented from axially shifting in the bearing, the second sealing lip 612 can be continuously kept in contact with the outer sealing ring, and the tightness is improved.

Further, in order to improve the radial tightness of the inner sealing ring, a third sealing lip 622 is formed by extending outwards at the root of the structure body, the third sealing lip 622 radially abuts against the inner diameter surface of the bearing outer ring 2, and on the basis that the original hook body 621 and the groove 4 form axial support, the third sealing lip 622 is matched with the first sealing lip 611, so that the complete axial annular radial support of the inner sealing ring is realized, the radial support degree is higher, and the dustproof effect is better.

The first bracket 5 comprises a first supporting portion 51 parallel to the end face of the bearing, a second supporting portion 52 is formed by inwards bending and extending one end of the first supporting portion 51 towards the outer sealing ring, the second supporting portion 52 is parallel to the axis of the bearing, the first supporting portion 51 inwards bends and extends towards the tail end of the inner sealing ring, a first lip 61 is sleeved outside the bent tail end of the first supporting portion 51 towards the inner sealing ring, and a second lip 62 is sleeved outside the second supporting portion 52. During operation, the second supporting part 52, the first supporting part 51 and the bent tail end of the first supporting part 51 form a cover-shaped structure protruding towards the end face of the bearing, and the cover-shaped structure is matched with the first sealing body 6, so that the formed cover-shaped structure can bear axial pressure from the mounting of the outer sealing ring, and further is attached to the bearing more tightly, and the sealing performance of the bearing is improved.

The above embodiments are merely illustrative embodiments of the present utility model, but the technical features of the present utility model are not limited thereto, and any changes or modifications made by those skilled in the art within the scope of the present utility model are included in the scope of the present utility model.

Claims

1. The bearing comprises an annular channel (3) formed by a bearing inner ring (1) and a bearing outer ring (2); the inner wall of one side of the top end of the annular channel (3) is provided with a groove (4), and is characterized in that:

the sealing structure comprises an inner sealing ring and an outer sealing ring;

the inner sealing ring comprises a first bracket (5) and a first sealing body (6) arranged on the first bracket (5); the first sealing body (6) comprises a first lip (61) and a second lip (62) which are respectively sleeved at two ends of the first bracket (5);

the first lip (61) comprises a first sealing lip (611) radially abutting against the inner wall of the other side of the annular channel;

the second lip part (62) is clamped in the groove (4);

the outer sealing ring is connected to the top ends of the bearing inner ring (1) and the bearing outer ring (2) and covers the inner sealing ring, a second sealing lip (612) extending outwards is arranged at the root of the first sealing lip (611), and the second sealing lip (612) axially abuts against the bottom of the outer sealing ring.

2. The automotive water pump bearing seal arrangement of claim 1, wherein: the angle between the second sealing lip (612) and the first carrier (5) is 30-60 °.

3. The automotive water pump bearing seal structure according to claim 1 or 2, characterized in that: the outer sealing ring comprises a second support (7) and a second sealing body (8) arranged on the second support (7), the second support (7) comprises an abutting portion (71) and a connecting portion (72) vertically connected with the abutting portion (71), the abutting portion (71) is parallel to the axis of the bearing and in interference abutting connection with the inner wall of the annular channel (3), and the second sealing body (8) is sleeved on the connecting portion (72) and in abutting connection with the inner wall of the other side of the annular channel (3).

4. A vehicle water pump bearing seal arrangement as claimed in claim 3, wherein: the first support (5) comprises a first supporting portion (51) parallel to the end face of the bearing, one end of the first supporting portion (51) is inwards bent and extended to form a second supporting portion (52), the second supporting portion (52) is mutually parallel to the axis of the bearing, the other end of the first supporting portion (51) is inwards bent and extended, the first lip portion (61) is sleeved outside the bent end of the first supporting portion (51), and the second lip portion (62) is sleeved outside the second supporting portion (52).

5. A vehicle water pump bearing seal arrangement as claimed in claim 3, wherein: the bottom radial extension of recess (4) is formed with fender shoulder (41), the top of recess (4) is formed with protruding face (42), second lip (62) include coupler body (621), the bottom vertical downward axial butt of coupler body (621) keeps off shoulder (41), the top of coupler body (621) stretches into recess (4) and vertical upward axial butt protruding face (42).

6. The automotive water pump bearing seal assembly of claim 5, wherein: the root of the hook body (621) is outwards extended with a third sealing lip (622), and the third sealing lip (622) radially abuts against the inner wall of the annular channel (3).

7. A vehicle water pump bearing seal arrangement as claimed in claim 3, wherein: the first bracket (5) and the second bracket (7) are made of rigid materials.

8. A vehicle water pump bearing seal arrangement as claimed in claim 3, wherein: the first sealing body (6) and the second sealing body (8) are made of rubber materials.