Bushing assembly

Abstract

The utility model relates to a bushing assembly, which comprises a bushing and a rubber ring arranged on the bushing. The bushing comprises a main body part, a chassis part arranged at one end of the main body part, and a step part arranged at the other end of the main body part. The rubber ring is arranged on the bushing through a vulcanization process, and the rubber ring comprises a connecting ring and an oil blocking ring arranged on one side of the connecting ring. The oil blocking ring is obliquely arranged, and the inner diameter of the oil blocking ring is gradually reduced from the end close to the lining to the other end. The main body part is in a hollow cylinder shape, and a plurality of grooves used for being matched with external parts are formed in the circumferential outer side wall of the main body part at intervals. According to the bushing assembly, a layer of HNBR material is vulcanized on the step part, so that the rubber ring is formed, and the minimum inner diameter of the oil blocking ring on the rubber ring is changed, so that the function of sealing lubricating oil or controlling the flow of the lubricating oil is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of bushing manufacturing, in particular to a bushing assembly. Background Art

[0002] A brass bushing is a wear-resistant component, and its application in an automobile is mainly to reduce the wear between two components, ensuring that automobile components can work along the designed trajectory within a relatively long service life. The installation and use of the brass bushing play an important role in improving the driving quality and riding comfort of the automobile. For example, Chinese Patent CN201120466076.5 discloses an automobile center rod bushing, which includes a metal inner sleeve, and a polyurethane rubber ring is arranged on the periphery of the inner sleeve. The inner sleeve and the polyurethane rubber ring are bonded into one body through vulcanization. By vulcanizing and bonding the polyurethane rubber ring on the periphery of the metal inner sleeve, the wear resistance of the bushing is improved, and the problem that the bushing fails due to the wear of the rubber is solved. However, this bushing cannot be used under the working conditions of sealing lubricating oil or controlling the lubricating oil flow rate. Summary of the Utility Model

[0003] In view of this, the utility model provides a bushing assembly to solve the above problems.

[0004] A bushing assembly includes a bushing and a rubber ring arranged on the bushing. The bushing includes a main body portion, a chassis portion arranged at one end of the main body portion, and a step portion arranged at one end of the main body portion away from the chassis portion. The rubber ring is arranged on the bushing through a vulcanization process and includes a connecting ring fixedly arranged on the step portion and an oil blocking ring arranged on one side of the connecting ring. The oil blocking ring is obliquely arranged, and the inner diameter of the oil blocking ring gradually decreases from the end close to the bushing towards the end away from the bushing.

[0005] Further, the main body portion is in a circular ring shape, and a plurality of grooves for matching external components are spaced apart on the circumferential outer side wall thereof.

[0006] Further, the surface of the chassis portion away from the main body portion is smooth and flat.

[0007] Further, the step portion is recessed in the circumferential inner side wall of the main body portion.

[0008] Further, the rubber ring is made of HNBR material.

[0009] Further, the connecting ring is in a circular ring shape, and the circumferential outer side wall of the connecting ring abuts against the circumferential inner side wall of the step portion parallel to the axis of the bushing.

[0010] Further, the inner diameter of the connecting ring is larger than the inner diameter of the main body portion.

[0011] Further, the inner diameter of the free end of the oil blocking ring is smaller than the outer diameter of the workpiece to be installed.

[0012] Further, the inner diameter of the free end of the oil blocking ring is larger than the outer diameter of the workpiece to be installed.

[0013] Compared with the prior art, the bushing assembly provided by the present utility model forms the rubber ring by vulcanizing a layer of HNBR material on the stepped portion. The oil blocking ring of the rubber ring is obliquely arranged. Specifically, the inner diameter of the oil blocking ring gradually decreases from the end close to the bushing to the end far from the bushing, so as to form a retracted opening. By changing the size of the minimum inner diameter of the oil blocking ring, the function of sealing lubricating oil or controlling the flow rate of lubricating oil is achieved. Specifically, when the inner diameter of the free end of the oil blocking ring is smaller than the outer diameter of the workpiece to be installed, the free end of the oil blocking ring closely adheres to the outer side wall of the workpiece to be installed, thereby achieving the function of sealing lubricating oil. When the inner diameter of the free end of the oil blocking ring is slightly larger than the outer diameter of the workpiece to be installed, that is, there is a gap between the inner side wall of the free end of the oil blocking ring and the workpiece to be installed, so that by controlling the size of this gap, the function of controlling the flow rate of lubricating oil can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of the bushing assembly provided by the present utility model.

[0015] Figure 2 is Figure 1 a cross-sectional schematic diagram of the bushing assembly.

[0016] Figure 3 is Figure 1 a schematic structural diagram of the bushing included in the bushing assembly.

[0017] Figure 4 is Figure 1 a schematic structural diagram of the rubber ring included in the bushing assembly. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following further details the specific embodiments of the present utility model. It should be understood that the description of the embodiments of the present utility model herein is not intended to limit the protection scope of the present utility model.

[0019] As Figure 1 shown, it is a schematic structural diagram of the bushing assembly provided by the present utility model. The bushing assembly includes a bushing 10 and a rubber ring 20 provided on the bushing 10. It can be imagined that the bushing assembly further includes some other functional modules, such as sealing rings, lubricating greases, etc., which are well-known technologies to those skilled in the art and will not be elaborated herein one by one.

[0020] Please refer to Figures 2 to 4 together. The bushing 10 is made of brass and has excellent wear resistance and shock absorption function. The bushing 10 includes a main body portion 11, a chassis portion 12 provided at one end of the main body portion 11, and a stepped portion 13 provided at one end of the main body portion 11 away from the chassis portion.

[0021] The main body portion 11 is circular ring-shaped, and a plurality of grooves are spaced on its circumferential outer side wall to match external components, so as to complete the assembly. At least two oil grooves are spaced on the circumferential inner side wall of the main body portion 11 to store lubricating oil. When in use, the main body portion 11 is sleeved on an installed workpiece, and the installed workpiece can be a shift lever or other parts. In addition, it can also be thought that after the bushing 10 is sleeved on the installed workpiece, lubricating oil should be injected into the interior of the main body portion 11 to reduce frictional loss.

[0022] One side surface of the chassis portion 12 away from the main body portion 11 is smooth and flat, so that the friction with components can be reduced, thereby reducing wear.

[0023] The stepped portion 13 is recessed in the circumferential inner side wall of the main body portion 11, so that when the rubber ring 20 is provided, the inner side wall of the stepped portion 13 can cover part of the rubber ring 20. The stepped portion 13 is the implementation site for the vulcanization process, and under the vulcanization process, the rubber ring 20 is fixed on the stepped portion 13.

[0024] The rubber ring 20 can be made of HNBR material. HNBR material, namely hydrogenated nitrile rubber (Hydrogenated Nitrile Rubber), is also called highly saturated nitrile rubber, and is a highly saturated elastomer obtained by special hydrogenation treatment of nitrile rubber (NBR). This treatment involves hydrogenating the unsaturated double bonds contained in the main chain of nitrile rubber, so as to obtain more excellent physical and chemical properties.

[0025] The rubber ring 20 is formed on the stepped portion 13 by vulcanization process using a special mold and includes a connecting ring 21 fixedly provided on the stepped portion 13, and an oil blocking ring 22 provided on the side of the connecting ring 21 facing away from the bushing 10. The vulcanization process itself is a prior art and will not be described in detail here.

[0026] The connecting ring 21 is circular ring-shaped, and the circumferential outer side wall of the connecting ring 21 abuts against the circumferential inner side wall of the stepped portion 13 parallel to the axis of the bushing 10, so that the stepped portion 13 covers the connecting ring 21, thereby further fixing the connecting ring 21.

[0027] The inner diameter of the connecting ring 21 can be larger than that of the main body portion 11. In this way, after the rubber ring 20 is formed, the inner wall of the connecting ring 21 is recessed into the step portion 13, and the gap formed due to the recess can be used for storing lubricating oil.

[0028] The oil-blocking ring 22 is obliquely arranged. Specifically, the inner diameter of the oil-blocking ring 22 gradually decreases from the end close to the bushing 10 towards the end away from the bushing 10, thus forming a retracted opening. In another embodiment, the inner diameter of the free end of the oil-blocking ring 22 is smaller than the outer diameter of the workpiece to be installed, so that the free end of the oil-blocking ring 22 can closely adhere to the outer side wall of the workpiece to be installed, thereby achieving the function of sealing the lubricating oil.

[0029] In another embodiment, the inner diameter of the free end of the oil-blocking ring 22 can be larger than the outer diameter of the workpiece to be installed, so that there is a gap between the inner side wall of the free end of the oil-blocking ring 22 and the workpiece to be installed. Furthermore, by controlling the size of this gap, the function of controlling the flow rate of the lubricating oil can be achieved.

[0030] When manufacturing the bushing assembly, first, a piece of brass is turned into a hollow cylindrical shape by rough turning on a machine tool, and the step portion 13 is cut to lay a foundation for subsequent assembly. Then, a layer of HNBR material is vulcanized on the step portion 13 through a special mold to form the rubber ring 20. In the finish machining stage, the end of the bushing 10 away from the rubber ring 20 is finish-turned on a high-precision lathe to meet the required dimensional accuracy and surface roughness requirements. Finally, hydrocarbon cleaning is carried out to remove the copper chips and impurities generated during the processing to ensure the cleanliness of the product.

[0031] Compared with the prior art, the bushing assembly provided by the present utility model forms the rubber ring 20 by vulcanizing a layer of HNBR material on the step portion 13. The oil-blocking ring 22 of the rubber ring 20 is obliquely arranged. Specifically, the inner diameter of the oil-blocking ring 22 gradually decreases from the end close to the bushing 10 towards the end away from the bushing 10 to form a retracted opening. By changing the size of the minimum inner diameter of the oil-blocking ring 22, the function of sealing the lubricating oil or controlling the flow rate of the lubricating oil can be achieved. Specifically, when the inner diameter of the free end of the oil-blocking ring 22 is smaller than the outer diameter of the workpiece to be installed, the free end of the oil-blocking ring 22 closely adheres to the outer side wall of the workpiece to be installed, thereby achieving the function of sealing the lubricating oil. When the inner diameter of the free end of the oil-blocking ring 22 is slightly larger than the outer diameter of the workpiece to be installed, that is, there is a gap between the inner side wall of the free end of the oil-blocking ring 22 and the workpiece to be installed, and thus by controlling the size of this gap, the function of controlling the flow rate of the lubricating oil can be achieved.

[0032] The above is only a preferred embodiment of the present utility model and is not intended to limit the protection scope of the present utility model. Any modification, equivalent replacement or improvement within the spirit of the present utility model is covered by the claims of the present utility model.

Claims

1. A bushing assembly, characterized in that: The bushing assembly includes a bushing and a rubber ring disposed on the bushing. The bushing includes a main body portion, a chassis portion disposed at one end of the main body portion, and a stepped portion disposed at one end of the main body portion away from the chassis portion. The rubber ring is disposed on the bushing through a vulcanization process and includes a connecting ring fixedly disposed on the stepped portion and an oil blocking ring disposed on a side of the connecting ring facing away from the bushing. The oil blocking ring is obliquely disposed, and the inner diameter of the oil blocking ring gradually decreases from one end close to the bushing to the other end away from the bushing.

2. The bushing assembly according to claim 1, characterized in that: The main body portion is annular, and a plurality of grooves for matching external components are spaced apart on the circumferential outer side wall thereof.

3. The bushing assembly according to claim 1, wherein: The surface of the chassis portion away from the main body portion is smooth and flat.

4. The bushing assembly according to claim 1, characterized in that: The stepped portion is recessed in the circumferential inner side wall of the main body portion.

5. The bushing assembly according to claim 1, wherein: The rubber ring is made of HNBR material.

6. The bushing assembly according to claim 1, wherein: The connecting ring is annular, and the circumferential outer side wall of the connecting ring abuts against the circumferential inner side wall of the stepped portion parallel to the axis of the bushing.

7. The bushing assembly according to claim 1, wherein: The inner diameter of the connecting ring is larger than the minimum inner diameter of the main body portion.

8. The bushing assembly according to claim 1, wherein: The inner diameter of the free end of the oil blocking ring is smaller than the outer diameter of the workpiece to be installed.

9. The bushing assembly according to claim 1, characterized in that: The inner diameter of the free end of the oil blocking ring is larger than the outer diameter of the workpiece to be installed.

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