Thrust bearing with high sealing performance

Abstract

A thrust bearing with high sealing performance comprises an upper cover, a lower cover, a middle ring, an antifriction gasket, an inner sealing ring and an outer sealing ring, wherein the inner sealing ring and the outer sealing ring are clamped between the upper cover and the lower cover. The upper cover comprises an upper outer check ring, two upper oil sealing rings arranged in a spaced mode and an upper inner check ring. The lower cover comprises a lower outer check ring, two lower oil sealing rings arranged in a spaced mode and a lower inner check ring. One upper oil sealing ring is inserted into a groove formed by one lower oil sealing ring and the lower outer check ring, and the other upper oil sealing ring is inserted into a groove formed by the other lower oil sealing ring and the lower inner check ring. According to the thrust bearing, a good sealing space is formed between the upper outer check ring and the upper inner check ring, so that internal lubricating grease can be prevented from overflowing outwards in the using process, external impurities can be prevented from entering the bearing, and the purpose of sealing is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile parts, in particular to a thrust bearing with high sealing performance. Background Art

[0002] As is known to all, in a strut-type suspension used for the front wheels of a four-wheeled vehicle, a strut assembly and a coil spring inserted into an outer cylinder of a main shaft are provided in a hydraulic shock absorber. When the strut assembly rotates together with the coil spring during a steering operation, there are a form in which the piston rod of the strut assembly rotates and a form in which the piston rod does not rotate. However, in any form of the strut-type suspension, it is necessary to ensure that the strut assembly can rotate smoothly. Therefore, a bearing needs to be provided on the strut assembly.

[0003] When the above-mentioned bearings are cleaned regularly or irregularly, for example, with a high-pressure water jet from a high-pressure washing machine to remove contamination caused by mud and water on the vehicle chassis, it is possible that the clean water formed by the high-pressure water jet enters the interior of the bearing and causes lubricating oil such as grease to flow out, thereby causing hidden dangers such as a decrease in sliding performance. Utility Model Content

[0004] In view of this, the utility model provides a thrust bearing with high sealing performance which can avoid the above problems.

[0005] A thrust bearing with high sealing performance comprises an upper cover, a lower cover buckled on the upper cover, a middle ring sandwiched between the upper cover and the lower cover, a friction reducing washer sandwiched between the middle ring and the upper cover, and an inner sealing ring and an outer sealing ring sandwiched between the upper cover and the lower cover. The upper cover comprises an upper cover body, an upper outer retaining ring extending perpendicularly to the upper cover body, two upper oil sealing rings arranged at intervals and extending perpendicularly to the upper cover body, and an upper inner retaining ring arranged at intervals from the upper oil sealing ring and extending perpendicularly to the upper cover body. An upper clamping ring is arranged on the inner side of the upper outer retaining ring. In the cross section along the arrangement direction of the upper cover and the lower cover, the upper clamping ring is a wedge-shaped structure with its hypotenuse facing the upper cover body. The lower cover comprises a lower cover body, a lower outer retaining ring extending perpendicularly to the upper cover body, two lower oil sealing rings arranged at intervals and extending perpendicularly to the lower cover body, and a lower inner retaining ring arranged at intervals from the lower oil sealing ring and extending perpendicularly to the lower cover body. One of the upper oil sealing rings is inserted in a groove formed by one of the lower oil sealing rings and the lower outer retaining ring, and the other upper oil sealing ring is inserted in a groove formed by another lower oil sealing ring and the lower inner retaining ring. A lower clamping ring is arranged on the outer side of the lower outer retaining ring. The lower clamping ring is triangular in the cross section along the arrangement direction of the upper cover and the lower cover, and the vertex of the triangle abuts against the inner side wall of the upper outer retaining ring. The middle ring is made of elastic material and accommodated in the two lower oil sealing rings. The height of the middle ring along the arrangement direction of the upper cover and the lower cover is based on the fact that the upper oil sealing ring does not contact the lower cover body when the upper and lower covers are squeezed. The anti-friction gasket is sandwiched between the middle ring and the upper cover body and is made of fluorine-containing material. The outer sealing ring is sandwiched in a cavity formed by the lower outer retaining ring, the upper outer retaining ring and the upper oil sealing ring. The inner sealing ring is sandwiched in a cavity formed by the lower inner retaining ring, the upper inner retaining ring and the upper oil sealing ring.

[0006] Furthermore, the upper and lower covers are made of thermoplastic plastic.

[0007] Furthermore, the middle ring is made of thermoplastic elastic material, and at least two reinforcing ribs are respectively arranged on two side surfaces of the middle ring facing the upper cover and the lower cover.

[0008] Furthermore, a dimension of the anti-friction gasket in a radial direction of the middle ring is larger than a dimension of the middle ring.

[0009] Furthermore, a labyrinth structure is formed by the lower outer retaining ring, the upper oil sealing ring, the lower oil sealing ring and the lower inner retaining ring, and the labyrinth structure is filled with lubricating grease.

[0010] Furthermore, the upper inner retaining ring and the lower inner retaining ring both extend out of the lower cover body.

[0011] Furthermore, a friction-reducing washer is sandwiched between the upper inner retaining ring and the lower inner retaining ring.

[0012] Furthermore, the lower cover also includes an end cover ring extending inward from the free end of the lower inner retaining ring, and the end cover ring is covered on the end of the upper inner retaining ring.

[0013] Furthermore, a groove is formed at the end of the upper inner retaining ring toward the lower inner retaining ring, and a top convex ring inserted into the groove is provided on the end cover ring.

[0014] Furthermore, the thrust bearing with high sealing performance also includes an end sealing ring inserted between the abutting convex ring and the groove.

[0015] Compared with the prior art, the thrust bearing with high sealing performance provided by the utility model is provided with an upper outer retaining ring, two upper oil sealing rings arranged at intervals, and an upper inner retaining ring on the upper cover, and the two upper oil sealing rings are arranged at intervals with the upper outer retaining ring and the upper inner retaining ring respectively to form two inner and outer grooves. At the same time, a lower outer retaining ring and a lower inner retaining ring are provided on the lower cover, and the lower outer retaining ring and the lower inner retaining ring are respectively inserted into the inner and outer grooves, and an inner sealing ring and an outer sealing ring are respectively provided in the inner and outer grooves. During use, since the upper and lower covers are sandwiched facing each other, the lower outer retaining ring and the lower inner retaining ring respectively apply a certain push force to the inner and outer sealing rings, so that a good sealing space can be formed between the upper outer retaining ring and the upper inner retaining ring, thereby preventing the internal lubricating grease from overflowing outwards and external impurities from entering the interior of the bearing during use, thereby achieving the purpose of sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the exploded structure of a thrust bearing with high sealing performance provided in the first embodiment of the utility model.

[0017] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure of a thrust bearing with high sealing performance.

[0018] Figure 3 for Figure 2 A partial enlarged view of a thrust bearing with high sealing performance at point A.

[0019] Figure 4 A schematic cross-sectional structure diagram of a thrust bearing with high sealing performance provided in the second embodiment of the utility model.

[0020] Figure 5 for Figure 4 A partial enlarged view of the thrust bearing with high sealing performance at point B.

[0021] Figure 6A schematic cross-sectional structure diagram of a thrust bearing with high sealing performance provided in the third embodiment of the utility model.

[0022] Figure 7 for Figure 6 A partial enlarged view of the thrust bearing with high sealing performance at position C. DETAILED DESCRIPTION

[0023] The following is a further detailed description of the specific embodiments of the present invention. It should be understood that the description of the embodiments of the present invention herein is not intended to limit the protection scope of the present invention.

[0024] like Figures 1 to 3 As shown, it is a schematic diagram of the structure of a thrust bearing with high sealing performance provided by the first embodiment of the utility model. The thrust bearing with high sealing performance includes an upper cover 10, a lower cover 20 buckled on the upper cover 10, a middle ring 30 sandwiched between the upper cover 10 and the lower cover 20, a friction-reducing gasket 40 sandwiched between the middle ring 30 and the upper cover 10, and an inner sealing ring 50 and an outer sealing ring 60 sandwiched between the upper cover 10 and the lower cover 20. It can be imagined that the thrust bearing with high sealing performance also includes some other functional modules, such as assembly components, mounting components, lubricating grease, etc., which are well known to those skilled in the art and will not be described in detail one by one here.

[0025] The upper cover 10 includes an upper cover body 11, an upper outer retaining ring 12 extending perpendicularly to the upper cover body 11, two upper oil sealing rings 13 arranged at intervals and extending perpendicularly to the upper cover body 11, and an upper inner retaining ring 14 arranged at intervals from the upper oil sealing rings 13 and extending perpendicularly to the upper cover body 11. The upper cover 10 can be integrally formed by injection molding, and its material can be hard engineering plastics, such as thermoplastic plastics. The upper outer retaining ring 12 is arranged perpendicularly to the upper cover body 11 and has an upper clamping ring 121 arranged on its inner side. Figure 3 As shown, in the cross section along the arrangement direction of the upper cover 10 and the lower cover 20, the upper clamping ring 121 is a wedge-shaped structure and its hypotenuse faces the upper cover body 11. The upper connection ring 121 is used to clamp with the lower clamping ring of the lower cover 20 to achieve the purpose of assembling and fixing the upper cover 10 and the lower cover 20. Specifically, the clamping ring 121 is arranged at the end of the upper outer retaining ring 12. The two upper oil sealing rings 13 are arranged at intervals and are respectively arranged at intervals with the upper outer retaining ring 12 and the upper inner retaining ring 14, so as to form a plurality of grooves located between the upper oil sealing ring 13, the upper outer retaining ring 12, and the upper inner retaining ring 14. When in use, the upper inner retaining ring 14 is usually sleeved together with the driving rod of the steering mechanism, so the length of the upper inner retaining ring 14 can be greater than the length of the upper outer retaining ring 12.

[0026] The lower cover 20 includes a lower cover body 21, a lower outer retaining ring 22 extending perpendicularly to the upper cover body 21, two lower oil sealing rings 23 spaced apart and extending perpendicularly to the lower cover body 21, and a lower inner retaining ring 24 spaced apart from the lower oil sealing ring 23 and extending perpendicularly to the lower cover body 24. The lower cover 20 can also be integrally formed by injection molding, and its material is also a hard material, such as thermoplastic. The lower outer retaining ring 22 is vertically arranged on the lower cover body 21, and is inserted between the upper outer retaining ring 12 and the upper oil sealing ring 13. In order to achieve the snap connection with the upper cover 10, a lower clamping ring 221 is arranged on the outer side of the lower outer retaining ring 22. In the cross section along the arrangement direction of the upper cover 10 and the lower cover 20, the lower clamping ring 221 is a triangle, and the vertex of the triangle abuts against the inner side wall of the upper outer retaining ring 12. Please refer to Figure 3 , one side of the lower clamping ring 221 of the triangular structure can be used as a guide side, that is, when the lower outer retaining ring 22 is inserted, it plays a guiding role, and the hypotenuse can prop up the upper outer retaining ring 12. When the lower outer retaining ring 22 is inserted between the upper outer retaining ring 12 and the upper oil sealing ring 13, the other side of the lower clamping ring 221 abuts against the hypotenuse of the upper clamping ring 121 to achieve the purpose of assembly. When in use, since the vertex of the triangle always abuts against the inner wall of the upper outer retaining ring 12, it can also prevent external impurities such as stones, dust, etc. from entering between the upper cover 10 and the lower cover 20. The distance between the two lower oil sealing rings 23 is smaller than the distance between the two upper oil sealing rings 13, so that the lower oil sealing ring 23 can be inserted between the two upper oil sealing rings 13, thereby forming a accommodating cavity. The lower outer retaining ring 22, the upper oil sealing ring 13, the lower oil sealing ring 23 and the lower inner retaining ring 24 form a labyrinth structure, and the labyrinth structure can be filled with lubricating grease. In order to ensure the lubrication effect and extend the service life, the lubricating grease should not overflow and be lost as much as possible.

[0027] The middle ring 30 and the friction-reducing pad 40 are accommodated in the accommodating cavity. The lower inner retaining ring 24 fits the upper inner retaining ring 14. When in use, the outer side of the lower cover body 21 will abut against a spring, and the outer side of the upper cover body 11 will abut against a resisting sheet provided on the driving rod, thereby clamping the upper and lower covers 10 and 20 together. Therefore, only the upper and lower clamping rings 121 and 221 on the upper and lower outer retaining rings 12 and 22 need to be provided, and no more assembly structures are required.

[0028] The middle ring 30 is used to buffer the change of the resisting force from the spring during the running of the vehicle. The middle ring 30 is accommodated between the two lower oil seal rings 23 and is made of thermoplastic elastic material. The middle ring 30 is provided with at least two reinforcing ribs on the two sides facing the upper and lower covers 10 and 20. At the same time, due to the presence of the reinforcing ribs, the friction coefficient between it and the anti-friction gasket 40 can also be reduced. The height of the middle ring 30 along the arrangement direction of the upper cover 10 and the lower cover 20 is based on the upper oil seal ring 13 not contacting the lower cover body 22 when the upper and lower covers 10 and 20 are squeezed.

[0029] The anti-friction gasket 40 is arranged between the middle ring 30 and the upper cover body 11, and can be made of plastic containing fluorine. The radial dimension of the anti-friction gasket 40 along the middle ring 30 is larger than the dimension of the middle ring 30, so as to increase compatibility. Since the friction coefficient between the anti-friction gasket 40 and the middle ring 30 is smaller than the friction coefficient between the middle ring 30 and the lower cover body 21, when the upper cover 10 rotates relative to the lower cover 20, the anti-friction gasket 40 and the upper cover 10 will move relative to each other, or the anti-friction gasket 40 and the middle ring 30 will move relative to each other, thereby reducing the wear of the middle ring 30 and increasing the life of the thrust bearing.

[0030] The outer sealing ring 60 can be made of expanded polytetrafluoroethylene, and is sandwiched in the cavity formed by the lower outer retaining ring 22, the upper outer retaining ring 12, and the upper oil sealing ring 13, and abuts against the end of the lower outer retaining ring 22. The function of the outer sealing ring 60 is not only to prevent foreign matter from entering the area where the middle ring 30 is located, but also to prevent the lubricating grease in the area where the middle ring 30 is located from overflowing.

[0031] The inner seal ring 50 can also be made of expanded polytetrafluoroethylene, and is sandwiched in the cavity formed by the lower inner retainer ring 24, the upper inner retainer ring 14, and the upper oil seal ring 13, and abuts against the end of the lower inner retainer ring 24. The inner seal ring 50 has the same function as the outer seal ring 60, which will not be described in detail.

[0032] Compared with the prior art, the thrust bearing with high sealing performance provided by the utility model is provided with an upper outer retainer ring 12, two upper oil seal rings 13 arranged at intervals, and an upper inner retainer ring 14 on the upper cover 10, and the two upper oil seal rings 13 are respectively arranged at intervals with the upper outer retainer ring 12 and the upper inner retainer ring 14 to form two inner and outer grooves. At the same time, a lower outer retainer ring 22 and a lower inner retainer ring 24 are provided on the lower cover 20, and the lower outer retainer ring 22 and the lower inner retainer ring 24 are respectively inserted into the inner and outer grooves, and an inner sealing ring 50 and an outer sealing ring 60 are respectively provided in the inner and outer grooves. During use, since the upper and lower covers 10, 20 are clamped toward each other, the lower outer retaining ring 22 and the lower inner retaining ring 24 apply a certain resisting force to the inner and outer sealing rings 50, 60 respectively, thereby forming a good sealing space between the upper outer retaining ring 12 and the upper inner retaining ring 13, thereby preventing the internal lubricating grease from overflowing during use and external impurities from entering the interior of the bearing, thereby achieving the purpose of sealing.

[0033] See also Figure 4 and Figure 5 , which is a schematic diagram of the structure of a thrust bearing with high sealing performance provided by the second embodiment of the utility model. The only difference between the second embodiment and the first embodiment is that a friction-reducing washer 70 is sandwiched between the upper inner circlip 14 and the lower inner circlip 24. Since the outer side of the upper inner circlip 14 is in contact and fixed with the drive rod, in order to increase the contact area, the upper inner circlip 14 and the lower inner circlip 24 both extend out of the lower cover 21. Therefore, in order to reduce the friction loss between the upper inner circlip 14 and the lower inner circlip 24, the friction-reducing washer 70 is sandwiched between the inner circlip 14 and the lower inner circlip 24. It can be understood that the friction-reducing washer 70 is made of fluorine-containing material. The existence of the friction-reducing washer 70 can reduce the friction coefficient between the upper inner circlip 14 and the lower inner circlip 24 when the bearing is subjected to radial pressure, ensure smooth rotation of the bearing, and reduce the wear between the upper inner circlip 14 and the lower inner circlip 24, thereby increasing the life of the thrust bearing.

[0034] See also Figure 6 and Figure 7, which is a schematic diagram of the structure of a thrust bearing with high sealing performance provided by the third embodiment of the utility model. The only difference between the third embodiment and the second embodiment is that the lower cover 20 also includes an end cover ring 25 extending inward from the free end of the lower inner retainer ring 24. The end cover ring 25 is covered on the end of the upper inner retainer ring 14. At the same time, the upper inner retainer ring 14 is provided with a groove 15 at the end facing the lower inner retainer ring 24. The end cover ring 25 is provided with a top convex ring 26 inserted into the groove 15. Furthermore, the thrust bearing with high sealing performance also includes an end sealing ring 80 inserted between the top convex ring 26 and the groove 15. Through the end sealing ring 80, foreign impurities can be prevented from entering the area where the anti-friction washer 70 described in the second embodiment is located, thereby extending the life of the anti-friction washer 70.

[0035] The above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modification, equivalent substitution or improvement within the spirit of the present invention are included in the scope of the claims of the present invention.

Claims

1. A thrust bearing with high sealing performance, characterized in that: The thrust bearing with high sealing performance comprises an upper cover, a lower cover snapped on the upper cover, a middle ring sandwiched between the upper cover and the lower cover, a friction reducing gasket sandwiched between the middle ring and the upper cover, and an inner sealing ring and an outer sealing ring sandwiched between the upper cover and the lower cover, the upper cover comprises an upper cover body, an upper outer retaining ring extending perpendicularly to the upper cover body, two upper oil sealing rings arranged at intervals and extending perpendicularly to the upper cover body, and an upper inner retaining ring arranged at intervals from the upper oil sealing ring and extending perpendicularly to the upper cover body, an upper clamping ring is arranged on the inner side of the upper outer retaining ring, and the upper clamping ring is a wedge-shaped structure with its hypotenuse facing the upper cover body in a cross section along the arrangement direction of the upper cover and the lower cover, the lower cover comprises a lower cover body, a lower outer retaining ring extending perpendicularly to the upper cover body, two lower oil sealing rings arranged at intervals and extending perpendicularly to the lower cover body, and an upper The cover body extends from the lower inner retaining ring, one of the upper oil sealing rings is inserted in a groove formed by one of the lower oil sealing rings and the lower outer retaining ring, and the other upper oil sealing ring is inserted in a groove formed by the other lower oil sealing ring and the lower inner retaining ring. A lower clamping ring is arranged on the outer side of the lower outer retaining ring. The lower clamping ring is triangular in cross section along the arrangement direction of the upper cover and the lower cover, and the vertex of the triangle abuts against the inner side wall of the upper outer retaining ring. The middle ring is made of elastic material. The middle ring is made and accommodated in two lower oil sealing rings, the height of the middle ring along the arrangement direction of the upper cover and the lower cover is such that the upper oil sealing ring does not contact the lower cover body when the upper and lower covers are squeezed, the anti-friction gasket is clamped between the middle ring and the upper cover body and is made of fluorine-containing material, the outer sealing ring is clamped in the cavity formed by the lower outer retaining ring, the upper outer retaining ring and the upper oil sealing ring, and the inner sealing ring is clamped in the cavity formed by the lower inner retaining ring, the upper inner retaining ring and the upper oil sealing ring.

2. The thrust bearing with high sealing performance according to claim 1, characterized in that: The upper and lower covers are made of thermoplastic plastic.

3. The thrust bearing with high sealing performance according to claim 1, characterized in that: The middle ring is made of thermoplastic elastic material, and at least two reinforcing ribs are respectively arranged on two side surfaces of the middle ring facing the upper cover and the lower cover.

4. The thrust bearing with high sealing performance according to claim 1, characterized in that: The dimension of the anti-friction washer in the radial direction of the middle ring is larger than that of the middle ring.

5. The thrust bearing with high sealing performance according to claim 1, characterized in that: The lower outer retaining ring, the upper oil sealing ring, the lower oil sealing ring and the lower inner retaining ring form a labyrinth structure, and the labyrinth structure is filled with lubricating grease.

6. The thrust bearing with high sealing performance according to claim 1, characterized in that: The upper inner retaining ring and the lower inner retaining ring both extend out of the lower cover body.

7. The thrust bearing with high sealing performance according to claim 6, characterized in that: A friction reducing washer is sandwiched between the upper inner retaining ring and the lower inner retaining ring.

8. The thrust bearing with high sealing performance according to claim 1, characterized in that: The lower cover also includes an end cover ring extending inwardly from the free end of the lower inner retaining ring, and the end cover ring is covered on the end of the upper inner retaining ring.

9. The thrust bearing with high sealing performance according to claim 8, characterized in that: The upper inner retaining ring is provided with a groove at the end portion facing the lower inner retaining ring, and the end cover ring is provided with a top convex ring inserted into the groove.

10. The thrust bearing with high sealing performance according to claim 9, characterized in that: The thrust bearing with high sealing performance also includes an end sealing ring inserted between the abutting convex ring and the groove.

Images