Oil seal sealing element of hydraulic retarder

Abstract

The utility model discloses an oil seal sealing element of a hydraulic retarder, which relates to the technical field of hydraulic retarders and comprises outer diameter rubber, a first axis hole is arranged on the inner bottom wall of the outer diameter rubber, an iron part assembly is arranged at the upper end of the outer diameter rubber and comprises a first iron part, and one end of the first iron part close to the outer diameter rubber is fixedly connected with a second iron part. One end, far away from the first iron piece, of the second iron piece is fixedly connected with a third iron piece, one end, far away from the second iron piece, of the third iron piece is fixedly connected with a fourth iron piece, and the inner side wall of the first iron piece is fixedly connected with lip rubber. And the lip rubber is a dynamic sealing surface and has an elastic property, so that the side wall of the axis hole in the lip rubber is more attached to a shaft, and an excellent sealing effect on the shaft is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic retarders, in particular to an oil seal of a hydraulic retarder. Background Art

[0002] The hydraulic retarder is a kind of automobile auxiliary braking device, which is mainly used in large passenger cars, urban buses, heavy trucks and military vehicles. The hydraulic retarder includes a heat exchanger, a rotor, a stator and a housing. The housing has an oil storage chamber and a working chamber. The rotor is fixed to the automobile transmission system. When the car is driving, the rotor will also rotate. The hydraulic retarder oil seal plays a vital role in the hydraulic retarder. Their main function is to ensure that the oil does not leak during the working process and prevent external impurities from entering the retarder, thereby ensuring the normal operation of the hydraulic retarder and extending its service life.

[0003] Chinese patent document CN220556047U discloses an oil seal with a reverse lip type, including a slow flow component, an elastic connection component is arranged inside the slow flow component, and a reverse lip is embedded at the lower end of the slow flow component. The slow flow component includes an inner part arranged at the upper end of the elastic connection component and an outer part arranged at the lower end of the elastic connection component. A slow flow channel for slow flow is formed between the inner part and the outer part, and the inner part and the outer part are used to install the elastic connection component and slow flow. The above-mentioned oil seal with a reverse lip type has shortcomings. Although the device can seal the oil, it has limitations. Its structure is complex, which is not conducive to production and increases production costs. Secondly, a spring is used for sealing. The spring is very easy to produce irreversible deformation under high temperature and high pressure, which directly leads to a decrease in spring elasticity, thereby reducing the sealing performance of the oil seal.

[0004] Therefore, in order to solve such problems, we propose a hydraulic retarder oil seal. Utility Model Content

[0005] The utility model aims to provide a hydraulic retarder oil seal, aiming to solve the problem in the above-mentioned background technology that the existing oil seal with a reverse lip type is complicated in structure and not conducive to production when used, and the spring is very easy to produce irreversible deformation under high temperature and high pressure, so that the sealing performance of the oil seal is reduced.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a hydraulic retarder oil seal, including an outer diameter rubber, a first axial hole is opened on the inner bottom wall of the outer diameter rubber, an iron piece assembly is arranged on the upper end of the outer diameter rubber, the iron piece assembly includes a first iron piece, an end of the first iron piece close to the outer diameter rubber is fixedly connected to a second iron piece, an end of the second iron piece away from the first iron piece is fixedly connected to a third iron piece, an end of the third iron piece away from the second iron piece is fixedly connected to a fourth iron piece, a lip rubber is fixedly connected to the inner side wall of the first iron piece, a lip groove is opened on the upper end of the lip rubber, a second axial hole is opened inside the lip rubber, and the second axial hole and the lip groove are connected.

[0007] Preferably, one end of the lip rubber away from the lip groove is sealed and fixedly connected to the upper end of the outer diameter rubber, the first axial hole and the second axial hole are connected, and the inner side wall of the first axial hole is flush with the inner side wall of the second axial hole.

[0008] Preferably, the lip rubber and the outer diameter rubber partially wrap the iron component.

[0009] Preferably, a first mounting groove is formed at one end of the outer diameter rubber away from the lip rubber, and a second mounting groove is formed on a side wall of the outer diameter rubber.

[0010] Preferably, one end of the outer diameter rubber away from the lip rubber is provided with a guide right angle.

[0011] Preferably, the second iron piece and the fourth iron piece are both in the shape of a hollow truncated cone.

[0012] The utility model has the following beneficial effects:

[0013] In the utility model, the outer diameter rubber is a static sealing surface, and the outer diameter rubber is a half-wrapped design, so that the outer diameter sealing has better stability and precise assembly characteristics, and the lip rubber is a dynamic sealing surface with elastic characteristics, so that the side wall of the axial hole inside the lip rubber fits the shaft more closely, and has an excellent sealing effect on the shaft. Secondly, the structure of the setting is simple, easy to produce, and reduces production costs, and there is no need to consider the problem of irreversible deformation of the spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A three-dimensional schematic diagram of a hydraulic retarder oil seal provided by the utility model Figure 1 ;

[0015] Figure 2 It is an exploded stereoscopic schematic diagram of an oil seal of a hydraulic retarder proposed by the utility model;

[0016] Figure 3 It is a three-dimensional schematic diagram of the outer diameter rubber in the oil seal of a hydraulic retarder proposed by the utility model;

[0017] Figure 4 It is a three-dimensional exploded schematic diagram of an iron component in a hydraulic retarder oil seal seal proposed by the utility model;

[0018] Figure 5 It is a three-dimensional schematic diagram of the lip rubber in the hydraulic retarder oil seal seal proposed by the utility model;

[0019] Figure 6 The utility model is a cross-sectional view of a hydraulic retarder oil seal.

[0020] Legend:

[0021] 1. Outer diameter rubber; 11. First axial hole; 12. First mounting groove; 13. Second mounting groove; 2. Iron piece assembly; 21. First iron piece; 22. Second iron piece; 23. Third iron piece; 24. Fourth iron piece; 3. Lip rubber; 31. Lip groove; 32. Second axial hole. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present utility model, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. The terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected, or indirectly connected through an intermediate medium, or it can be a communication between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0024] Reference Figure 1-6The utility model provides an embodiment: a hydraulic retarder oil seal, comprising an outer diameter rubber 1, a first axial hole 11 is opened on the inner bottom wall of the outer diameter rubber 1, an iron component 2 is arranged on the upper end of the outer diameter rubber 1, the iron component 2 comprises a first iron component 21, an end of the first iron component 21 close to the outer diameter rubber 1 is fixedly connected to a second iron component 22, an end of the second iron component 22 away from the first iron component 21 is fixedly connected to a third iron component 23, an end of the third iron component 23 away from the second iron component 22 is fixedly connected to a fourth iron component 24, a lip rubber 3 is fixedly connected to the inner side wall of the first iron component 21, a lip groove 31 is opened on the upper end of the lip rubber 3, a second axial hole 32 is opened inside the lip rubber 3, and the second axial hole 32 and the lip groove 31 are communicated.

[0025] This arrangement, through the unique shape composed of the first iron piece 21, the second iron piece 22, the third iron piece 23 and the fourth iron piece 24, enables the iron piece assembly 2 to apply a force focused toward the center to the lip rubber 3 arranged on the inner wall of the first iron piece 21, so that the iron piece assembly 2 squeezes the lip rubber 3, so that the side wall of the second axial hole 32 inside the lip rubber 3 fits the shaft more closely, thereby achieving a very good sealing effect on the shaft.

[0026] One end of the lip rubber 3 away from the lip groove 31 is sealed and fixedly connected to the upper end of the outer diameter rubber 1, the first axial hole 11 and the second axial hole 32 are connected, and the inner wall of the first axial hole 11 and the inner wall of the second axial hole 32 are flush, so as to use the lip rubber 3 and the outer diameter rubber 1 to fully cover the fourth iron piece 24 in the iron piece assembly 2 to prevent the fourth iron piece 24 from being exposed inside and outside the first axial hole 11 and the second axial hole 32.

[0027] The lip rubber 3 and the outer diameter rubber 1 partially wrap the iron component 2, and are used to fully cover the second iron component 22, the third iron component 23 and the fourth iron component 24, ensuring that the outer diameter sealing has better stability and precise assembly characteristics.

[0028] A first mounting groove 12 is formed at one end of the outer diameter rubber 1 away from the lip rubber 3 , and a second mounting groove 13 is formed on the side wall of the outer diameter rubber 1 for assembling the device with the hydraulic retarder.

[0029] One end of the outer diameter rubber 1 away from the lip rubber 3 is provided with a guide right angle, which is used for assembling the outer diameter rubber 1 and the retarder, thereby increasing the convenience of assembly.

[0030] The second iron piece 22 and the fourth iron piece 24 are both in the shape of a hollow truncated cone, so as to ensure that the iron piece assembly 2 applies pressure to the lip rubber 3 .

[0031] Working principle: The fourth iron piece 24 in the iron piece assembly 2 is fully wrapped with the lip rubber 3 and the outer diameter rubber 1, and the fourth iron piece 24 is prevented from being exposed inside and outside the first axial hole 11 and the second axial hole 32. The seal is installed on the hydraulic retarder through the first installation groove 12 and the second installation groove 13, and then the shaft is inserted into the first axial hole 11 and the second axial hole 32. Then, through the unique shape composed of the first iron piece 21, the second iron piece 22, the third iron piece 23 and the fourth iron piece 24, the iron piece assembly 2 applies a force focused toward the center to the lip rubber 3 arranged on the inner wall of the first iron piece 21, and the iron piece assembly 2 squeezes the lip rubber 3, so that the side wall of the second axial hole 32 inside the lip rubber 3 fits the shaft more closely, which has a very good sealing effect on the shaft.

[0032] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hydraulic retarder oil seal, comprising an outer diameter rubber (1), characterized in that: The inner bottom wall of the outer diameter rubber (1) is provided with a first axial hole (11); the upper end of the outer diameter rubber (1) is provided with an iron component assembly (2); the iron component assembly (2) comprises a first iron component (21); an end of the first iron component (21) close to the outer diameter rubber (1) is fixedly connected to a second iron component (22); an end of the second iron component (22) away from the first iron component (21) is fixedly connected to a third iron component (23); an end of the third iron component (23) away from the second iron component (22) is fixedly connected to a fourth iron component (24); an inner side wall of the first iron component (21) is fixedly connected to a lip rubber (3); a lip groove (31) is provided at the upper end of the lip rubber (3); a second axial hole (32) is provided inside the lip rubber (3); and the second axial hole (32) and the lip groove (31) are communicated.

2. The hydraulic retarder oil seal according to claim 1, characterized in that: One end of the lip rubber (3) away from the lip groove (31) is sealed and fixedly connected to the upper end of the outer diameter rubber (1); the first axial hole (11) and the second axial hole (32) are connected, and the inner wall of the first axial hole (11) and the inner wall of the second axial hole (32) are flush.

3. The hydraulic retarder oil seal according to claim 1, characterized in that: The lip rubber (3) and the outer diameter rubber (1) partially wrap the iron component (2).

4. The hydraulic retarder oil seal according to claim 1, characterized in that: A first mounting groove (12) is provided at one end of the outer diameter rubber (1) away from the lip rubber (3), and a second mounting groove (13) is provided on the side wall of the outer diameter rubber (1).

5. The hydraulic retarder oil seal according to claim 1, characterized in that: One end of the outer diameter rubber (1) away from the lip rubber (3) is provided with a right angle.

6. The hydraulic retarder oil seal according to claim 1, characterized in that: The second iron piece (22) and the fourth iron piece (24) are both in the shape of a hollow truncated cone.

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