Small-torque automobile damping bearing

Abstract

The utility model discloses a small-torque automobile damping bearing which comprises an annular upper cover body, an annular lower cover body detachably connected with the upper cover body, an annular first oil film used for lubrication and an annular first gasket. The lower cover body, the first gasket, the first oil film and the upper cover body are sequentially stacked from bottom to top. The upper part of the first gasket is attached to the first oil film; the peripheral wall of the lower cover body is sleeved with a flexible first ring body with an L-shaped axial section; a rigid second ring body with an L-shaped axial section is embedded in the inner circumferential wall of the first ring body; the radial extending part of the second ring body is attached to the lower end face of the lower cover body. The axial extending part of the second ring body is attached to the peripheral wall of the lower cover body. The utility model solves the technical problem that the service life is influenced by the direct friction between the gasket and the bearing cover body, and achieves the technical effects of reducing the friction torque between the gasket and the bearing cover body and prolonging the service life of the bearing.

Description

Technical Field

[0001] The utility model relates to the technical field of automotive shock-absorbing bearings, and particularly to an automotive shock-absorbing bearing with a small torque. Background Technique

[0002] A flat pressure bearing (also known as a thrust sliding bearing) is a sliding bearing that mainly bears axial loads and is commonly used to reduce friction, transmit thrust, or support axial forces. Currently, it is generally used as an automotive shock-absorbing bearing in the field of automotive shock absorption. The flat pressure bearing made of rubber or plastic has the characteristics of light weight, corrosion resistance, and shock absorption.

[0003] The existing shock-absorbing bearing is composed of an upper cover, a flat washer, and a lower cover stacked in sequence. After the bearing is subjected to an axial force, the upper and lower covers made of an elastic material will deform radially and generate friction with the flat washer. Usually, lubricating grease is pre-placed between the flat washer and the upper and lower covers for lubrication to reduce the friction between the flat washer and the upper and lower covers of the bearing.

[0004] However, as the service time increases, the milky lubricating grease will gradually be consumed, and the grease between the flat washer and the upper cover will be displaced due to extrusion, resulting in the flat washer gradually directly rubbing against the upper cover of the bearing, causing the friction force and friction torque to increase, and the wear degree of the upper cover to accelerate. Since the grease accumulates downward between the flat washer and the lower cover, effective lubrication is obtained, which will cause the wear of the upper cover to be much faster than that of the lower cover. The entire bearing needs to be replaced due to the damage of the upper cover, resulting in waste of the lower cover material and a decrease in the service life of the bearing.

[0005] Therefore, it is necessary to solve the problem that the flat washer directly wears the upper and lower covers. Content of the Utility Model

[0006] This application provides an automotive shock-absorbing bearing with a small torque, which is used to solve the technical problem that the direct friction between the washer and the bearing cover affects the service life.

[0007] A small-torque automotive shock-absorbing bearing provided by the present application includes: an annular upper cover body, an annular lower cover body detachably connected to the upper cover body, an annular first oil film for lubrication, and an annular first washer; the lower cover body, the first washer, the first oil film, and the upper cover body are coaxially arranged and stacked in sequence from bottom to top; an annular first groove coaxial with the upper cover body is provided on the lower end surface of the upper cover body; the first oil film is arranged in the first groove; the upper part of the first washer enters the first groove and abuts against the first oil film; a flexible first ring body is sleeved on the outer peripheral wall of the lower cover body, and the axial cross-section of the first ring body is in an "L" shape; the upper end of the axially extending part of the first ring body is higher than the upper end surface of the lower cover body; an annular fifth groove is provided on the inner peripheral wall of the first ring body, and a rigid second ring body is embedded in the fifth groove, and the axial cross-section of the second ring body is in an "L" shape; the radially extending part of the second ring body is attached to the lower end surface of the lower cover body; the axially extending part of the second ring body is attached to the outer peripheral wall of the lower cover body, and the upper end of the axially extending part of the second ring body is higher than the upper end surface of the lower cover body.

[0008] By adopting the above technical solution, a first oil film is arranged between the upper cover body and the first washer, avoiding the problem that the upper cover body is directly frictionally worn at the contact part between the first washer and the upper cover body due to the loss of lubricating grease, reducing the frictional force and frictional torque between the first washer and the upper cover body, and improving the service life of the product; the first ring body is arranged to fit the outer peripheral wall of the lower cover body and extend upward, further improving the sealing effect of the bearing; a rigid second ring body is arranged to support the housing of the outer ring of the lower cover body, avoiding large position offsets of the housing of the first groove part due to the axial force applied by the first convex ring to the first groove, resulting in unstable connection of the upper and lower covers and rapid wear of the first groove.

[0009] Preferably, a plurality of annular third grooves for storing lubricating grease are concentrically arranged on the upper end surface of the first washer, and the plurality of third grooves are evenly spaced in the radial direction.

[0010] By adopting the above technical solution, a plurality of third grooves are arranged on the upper end surface of the first washer, increasing the storage capacity of the lubricating grease, thereby improving the service life of the product.

[0011] Preferably, an annular second groove coaxial with the lower cover body is provided on the upper end surface of the lower cover body, the lower part of the first washer is arranged in the second groove, and a plurality of annular fourth grooves for storing lubricating grease are concentrically arranged on the lower end surface of the first washer, and the plurality of fourth grooves are evenly spaced in the radial direction.

[0012] By adopting the above technical solution, a plurality of fourth grooves are arranged on the lower end surface of the first washer, increasing the storage capacity of the lubricating grease, thereby improving the service life of the product.

[0013] Preferably, a second oil film which is annular and coaxial with the second groove is provided in the second groove. The lower end surface of the second oil film is attached to the bottom of the second groove, and the upper end surface of the second oil film is attached to the lower end surface of the first washer.

[0014] By adopting the above technical solution, a second oil film is provided between the first washer and the lower cover body for lubrication, reducing the friction force between the first washer and the lower cover body, thereby reducing the frictional torque, avoiding the problem of direct friction between the first washer and the lower cover body caused by the loss of lubricating grease, reducing the wear of the first washer and the lower cover body, and improving the service life of the product.

[0015] Preferably, a first convex ring which is annular and coaxial with the upper cover body is provided on the lower end surface of the upper cover body. The diameter of the inner peripheral wall of the first convex ring is not less than the diameter of the outer peripheral wall of the first groove. A first groove adapted for the insertion of the first convex ring is provided on the upper end surface of the lower cover body, and the diameter of the inner peripheral wall of the first groove is greater than the diameter of the outer peripheral wall of the second groove.

[0016] By adopting the above technical solution, the first convex ring on the upper cover body is inserted into the first groove of the lower cover body. After the upper cover body is subjected to an axial load, the first convex ring and the first groove are pressed against each other, improving the sealing effect of the grease at the first washer. At the same time, the insertion of the first convex ring into the first groove strengthens the radial connection between the upper cover body and the lower cover body.

[0017] Preferably, a clamping member extending obliquely downward is provided on the outer peripheral wall of the first ring body in a circumferential manner. A third ring body extending downward is provided at the outer edge of the upper cover body. A raised snap ring is provided on the inner peripheral wall of the third ring body in a circumferential manner. The snap ring is located below the clamping member, and the clamping member is in interference fit with the third ring body.

[0018] By adopting the above technical solution, a clamping member is provided at the upper outer wall of the first ring body. The first ring body is clamped on the upper cover body through the cooperation of the clamping member and the snap ring. At the same time, the lower end portion of the clamping member is attached to the inner wall of the third ring body through the interference fit between the clamping member and the third ring body, further improving the sealing effect of the bearing.

[0019] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0020] 1. A first oil film is provided between the upper cover body and the lower cover group, avoiding the problem of direct friction and wear of the upper cover body caused by the loss of lubricating grease at the contact part between the lower cover group and the upper cover group, reducing the friction force and frictional torque between the lower cover group and the upper cover body, and improving the service life of the product;

[0021] 2. A third groove and a fourth groove are respectively provided on both sides of the first washer, increasing the storage amount of lubricating grease, thereby improving the service life of the product;

[0022] 3. The first convex ring on the upper cover body is inserted into the first groove of the lower cover body. After the upper cover body is subjected to a radial load, the first convex ring and the first groove are squeezed against each other, improving the sealing effect of the grease at the first gasket. At the same time, the insertion of the first convex ring into the first groove strengthens the radial connection between the upper cover body and the lower cover body;

[0023] 4. The first ring body is arranged to fit the outer peripheral wall of the lower cover body and extend upward to abut against the lower end surface of the upper cover body, further improving the sealing effect of the bearing. At the same time, a rigid second ring body is provided to support the housing of the outer ring of the lower cover body, preventing the first convex ring from applying an axial force to the first groove, which may cause a large displacement of the housing part of the first groove, resulting in unstable connection between the upper and lower covers and rapid wear of the first groove;

[0024] 5. A clamping member is arranged at the upper outer wall of the first ring body. The first ring body is clamped on the upper cover body through the cooperation of the clamping member and the snap ring. At the same time, the lower end part of the clamping member is fitted with the inner wall of the third ring body through the interference fit between the clamping member and the third ring body, further improving the sealing effect of the bearing;

[0025] 6. A second oil film is arranged between the first gasket and the lower cover body for lubrication, reducing the friction force between the first gasket and the lower cover body, thereby reducing the frictional torque, avoiding the problem of direct friction between the first gasket and the lower cover body caused by the loss of lubricating grease, reducing the wear of the first gasket and the lower cover body, and improving the service life of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0027] Figure 1 It is an exploded axonometric view of a small-torque automotive shock-absorbing bearing provided by the present application;

[0028] Figure 2 It is an exploded side view of a small-torque automotive shock-absorbing bearing provided by the present application;

[0029] Figure 3 is Figure 2 a cross-sectional view in the A-A direction of

[0030] Figure 4 It is a cross-sectional view of a small-torque automotive shock-absorbing bearing provided by the present application;

[0031] Figure 5 is Figure 4 a partial enlarged view of area A in

[0032] Figure 6 A sectional view of a small-torque automotive shock-absorbing bearing provided for this application, with a second oil film provided therein;

[0033] Figure 7 is Figure 6 A partial enlarged view of area B in it.

[0034] Explanation of reference numerals: 1. Upper cover body; 11. Axial hole; 12. First groove; 13. Snap ring; 14. First convex ring; 15. Third ring body; 16. Sixth groove; 2. First oil film; 3. First washer; 31. Third groove; 32. Fourth groove; 33. First groove; 4. Lower cover body; 41. Second groove; 5. Second oil film; 61. First ring body; 611. Fastening member; 612. Fifth groove; 62. Second ring body. Detailed implementation manners

[0035] This application provides a small-torque automotive shock-absorbing bearing, which is used to solve the technical problem that direct friction between the washer and the bearing cover body in the prior art affects the service life.

[0036] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0037] The embodiments of the present utility model are described in detail below. The examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0038] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the accompanying drawings. It 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 should not be construed as a limitation of the present utility model.

[0039] In the description of the present utility model, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, exceeding, etc. are understood as not including the present number, and above, below, within, etc. are understood as including the present number. If there is a description of first and second, it is only for the purpose of distinguishing technical features and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0040] In the description of the present utility model, unless otherwise clearly defined, terms such as "arrangement", "installation", and "connection" should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present utility model in combination with the specific content of the technical solution.

[0041] Embodiment 1

[0042] As Figures 1 to 5 shown, the embodiment of the present application provides a small-torque automotive shock-absorbing bearing, including: an annular upper cover body 1, an annular lower cover body 4 detachably connected to the upper cover body 1, an annular first oil film 2 for lubrication, and an annular first washer 3; the lower cover body 4, the first washer 3, the first oil film 2, and the upper cover body 1 are coaxially arranged and stacked in sequence from bottom to top; an annular first groove 12 coaxial with the upper cover body 1 is provided on the lower end surface of the upper cover body 1; the first oil film 2 is arranged in the first groove 12; the upper part of the first washer 3 enters the first groove 12 and is in contact with the first oil film 2; a flexible first ring body 61 is sleeved on the outer peripheral wall of the lower cover body 4, and the axial cross-section of the first ring body 61 is in an "L" shape; the upper end of the axially extending part of the first ring body 61 is higher than the upper end surface of the lower cover body 4; an annular fifth groove 612 is provided on the inner peripheral wall of the first ring body 61, and a rigid second ring body 62 is embedded in the fifth groove 612, and the axial cross-section of the second ring body 62 is in an "L" shape; the radially extending part of the second ring body 62 is in contact with the lower end surface of the lower cover body 4; the axially extending part of the second ring body 62 is in contact with the outer peripheral wall of the lower cover body 4, and the upper end of the axially extending part of the second ring body 62 is higher than the upper end surface of the lower cover body 4.

[0043] More preferably, in the embodiment provided by the present application, a shaft hole 11 is provided at the center of the upper cover body 1, a part of the upper cover body 1 protrudes relatively and is arranged around the shaft hole 11, a first convex ring 14 is provided on the upper cover body 1 in a ring shape, the first convex ring 14 and the shell of the upper cover body 1 at the shaft hole 11 cooperate to form the first groove 12, a first oil film 2 is provided at the bottom of the first groove 12, the first oil film 2 is a flat annular structure, one side of the first oil film 2 is in contact with the bottom of the first groove 12, the other side of the first oil film 2 is in contact with the first washer 3, the first washer 3 is sleeved in the first groove 12 around the shaft hole 11, a first groove 33 is provided on the surface of the lower cover body 4 close to the upper cover body 1, when assembled, the first convex ring 14 is embedded in the first groove 33, the inner ring groove body of the first groove 33 and the shell of the lower cover body 4 at the shaft hole 11 cooperate to form a second groove 41, and the part of the first washer 3 located outside the first groove 12 is embedded in the second groove 41, wherein the width of the first oil film 2 is greater than the width of the first washer 3, and the lower cover body 4, the first washer 3, the first oil film 2, and the upper cover body 1 are stacked in sequence from bottom to top.

[0044] As Figure 3 、 Figure 4 and Figure 5As shown in the figure, two third grooves 31 are provided on one side of the first washer 3 that fits against the first oil film 2. The two third grooves 31 are distributed at intervals and arranged in a ring on the first washer 3. Two fourth grooves 32 are provided on one side of the first washer 3 that fits against the second groove 41. The two fourth grooves 32 are distributed at intervals and arranged in a ring on the first washer 3. During use, the emulsified lubricating grease is filled in the third grooves 31 and the fourth grooves 32.

[0045] As Figure 3 , Figure 4 and Figure 5 shown, a first ring body 61 and a second ring body 62 are sleeved on the outer periphery of the lower cover body 4. The first ring body 61 is made of a flexible material such as "NBR nitrile rubber", and the second ring body 62 is made of a rigid material such as "SPHC hot-rolled low-carbon steel plate"; half of the cross-section of the first ring body 61 in the axial direction is in an "L" shape. A fifth groove 612 suitable for the second ring body 62 to be embedded is provided on the first ring body 61. Both the fifth groove 612 and half of the cross-section of the second ring body 62 in the axial direction are in an "L" shape. The second ring body 62 fits on the outer ring surface of the lower cover body 4. The upper ends of both the second ring body 62 and the first ring body 61 are higher than the upper end surface of the lower cover body 4. A sixth groove 16 is provided on the lower end surface of the upper cover body 1. The sixth groove 16 is arranged in a ring outside the first convex ring 14. The upper end of the first ring body 61 enters the sixth groove 16. During use, the second ring body 62 provides support for the lower cover body 4 at the first groove 33 to prevent the lower cover body 4 from deforming under the action of the first convex ring 14; As Figure 3 and Figure 5 shown, a ring of clamping members 611 is provided around the first ring body 61 near the upper cover body 1. The clamping members 611 are arranged obliquely relative to the first ring body 61. A third ring body 15 extending downward is provided at the outer edge of the upper cover body 1. A snap ring 13 is arranged on the inner wall of the lower end of the third ring body 15. The snap ring 13 protrudes relative to the inner wall of the third ring body 15. When the first ring body 61 is snapped into the upper cover body 1, the lower end portion of the clamping member 611 abuts against the inner wall of the third ring body 15.

[0046] Among them, both the upper cover body 1 and the lower cover body 4 are made of "POM polyoxymethylene" material. The first oil film 2 is made of a material with a lower coefficient of friction, such as "polytetrafluoroethylene", and the first washer 3 is made of "TPEE thermoplastic polyester elastomer" material.

[0047] During installation, the first oil film 2 and the first washer 3 filled with lubricating grease are sequentially placed into the first groove 12, and then the lower cover body 4 is fixed to the upper cover body 1 through a sealing ring to complete the installation of the bearing; During use, when the upper cover body 1 bears weight and presses the lower cover body 4 downward, under the action of an external force, the first convex ring 14 abuts against the first groove 33, and the upper end of the first ring body 61 abuts against the bottom of the sixth groove 16.

[0048] In this embodiment, a first oil film 2 is provided between the first washer 3 and the upper cover body 1 for lubrication, which reduces the frictional force between the first washer 3 and the upper cover body 1, thereby reducing the frictional torque, avoiding the problem of direct friction between the first washer 3 and the upper cover body 1 due to the loss of lubricating grease, reducing the wear of the first washer 3 and the upper cover body 1, and improving the service life of the product.

[0049] Embodiment 2

[0050] Furthermore, as Figure 6 and Figure 7 shown, on the basis of the above embodiment, a second oil film 5 is provided in the second groove 41. One side of the second oil film 5 is attached to the bottom of the second groove 41, and the other side of the second oil film 5 is attached to the first washer 3. The second oil film 5 is made of the same material with a relatively low coefficient of friction as the first oil film 2, such as "polytetrafluoroethylene".

[0051] In this embodiment, a second oil film 5 is provided between the first washer 3 and the lower cover body 4 for lubrication, which reduces the frictional force between the first washer 3 and the lower cover body 4, thereby reducing the frictional torque, avoiding the problem of direct friction between the first washer 3 and the lower cover body 4 due to the loss of lubricating grease, reducing the wear of the first washer 3 and the lower cover body 4, and improving the service life of the product.

[0052] It should be noted that the above sequence of the embodiments of the present application is only for description and does not represent the superiority or inferiority of the embodiments. And the above specific embodiments of this specification are described. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims can be performed in a different order than in the embodiments and still achieve the desired result. Additionally, the processes depicted in the drawings do not necessarily require the specific order or sequential order shown to achieve the desired result. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0053] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

[0054] This specification and the drawings are only exemplary descriptions of the present application and are considered to have covered any and all modifications, variations, combinations, or equivalents within the scope of the present application. Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the present application and its equivalent technologies, the present application is intended to include these changes and modifications.

Claims

1. A low-torque automobile vibration-damping bearing, characterized in that: The invention comprises an annular upper cover body (1), an annular lower cover body (4) detachably connected to the upper cover body (1), an annular first oil film (2) for lubrication, and an annular first gasket (3); the lower cover body (4), the first gasket (3), the first oil film (2) and the upper cover body (1) are coaxially arranged and stacked in sequence from bottom to top; a first annular groove (12) coaxial with the upper cover body (1) is provided on the lower end surface of the upper cover body (1); the first oil film (2) is arranged in the first groove (12); the upper part of the first gasket (3) enters the first groove (12) and is in contact with the first oil film (2); a flexible first ring body (61) is sleeved on the outer peripheral wall of the lower cover body (4) The axial cross section of the first ring body (61) is in an "L" shape; the upper end of the axially extending portion of the first ring body (61) is higher than the upper end surface of the lower cover body (4); an annular fifth groove (612) is provided on the inner peripheral wall of the first ring body (61), and a rigid second ring body (62) is embedded in the fifth groove (612), and the axial cross section of the second ring body (62) is in an "L" shape; the radially extending portion of the second ring body (62) is in contact with the lower end surface of the lower cover body (4); the axially extending portion of the second ring body (62) is in contact with the outer peripheral wall of the lower cover body (4), and the upper end of the axially extending portion of the second ring body (62) is higher than the upper end surface of the lower cover body (4).

2. A low-torque automobile vibration-damping bearing according to claim 1, characterized in that: The upper end surface of the first gasket (3) is concentrically provided with a plurality of annular third grooves (31) for storing lubricating grease, and the plurality of third grooves (31) are evenly spaced and distributed in the radial direction.

3. The low-torque automobile vibration-damping bearing according to claim 1, characterized in that: The upper end surface of the lower cover body (4) is provided with an annular second groove (41) coaxial with the lower cover body (4), the lower portion of the first gasket (3) is arranged in the second groove (41), and the lower end surface of the first gasket (3) is concentrically provided with a plurality of annular fourth grooves (32) for storing lubricating grease, wherein the plurality of fourth grooves (32) are evenly spaced in the radial direction.

4. A low-torque automobile vibration-damping bearing according to claim 3, characterized in that: The lower end surface of the upper cover body (1) is provided with a first convex ring (14) which is annular and coaxial with the upper cover body (1); the diameter of the inner peripheral wall of the first convex ring (14) is not less than the diameter of the outer peripheral wall of the first groove (12); the upper end surface of the lower cover body (4) is provided with a first groove (33) suitable for the first convex ring (14) to be inserted; the diameter of the inner peripheral wall of the first groove (33) is greater than the diameter of the outer peripheral wall of the second groove (41).

5. A low-torque automobile vibration-damping bearing according to claim 4, characterized in that: An annular second oil film (5) coaxial with the second groove (41) is provided in the second groove (41); the lower end surface of the second oil film (5) is in contact with the bottom of the second groove (41); and the upper end surface of the second oil film (5) is in contact with the lower end surface of the first gasket (3).

6. The low-torque automobile vibration-damping bearing according to claim 1, characterized in that: A clamping piece (611) extending obliquely downward is provided on the outer peripheral wall of the first ring body (61), a third ring body (15) extending downward is provided on the outer edge of the upper cover body (1), a raised clamping ring (13) is provided on the inner peripheral wall of the third ring body (15), the clamping ring (13) is located below the clamping piece (611), and the clamping piece (611) and the third ring body (15) are interference fit.

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