Long-life bushing for a steering device

Abstract

This utility model discloses a long-life bushing for a steering device, aiming to solve the problem of poor long-term lubrication effect and reduced service life of existing bushings. The key technical points are: it includes a bushing body with a mounting hole for mating with the steering device, the mounting hole extending axially through the bushing body; a spirally distributed lubrication groove on the outer wall of the bushing body; a spirally distributed lubrication groove on the inner wall of the bushing body; and multiple lubrication holes for storing lubricating oil on the inner wall of the bushing body. One end of each lubrication hole is located on the inner wall of the bushing body and communicates with the mounting hole, while the other end extends away from the mounting hole. The bushing body includes a base support layer and a surface lubrication layer disposed on the base support layer. This utility model balances strength and lubrication; the surface lubrication layer utilizes self-lubrication and wear resistance to significantly reduce the coefficient of friction and reduce direct wear between the shaft and the bushing.

Description

Technical Field

[0001] This utility model relates to the field of bushing technology, and in particular to a long-life bushing for steering devices. Background Technology

[0002] The bushing is responsible for axial movement or limiting the stroke. Because the operating conditions of the bushing are relatively harsh, in order to ensure its operating accuracy, safety and service life, the parts must have high wear resistance, corrosion resistance, strength and toughness, and be well lubricated.

[0003] In the prior art, patent document CN219865179U discloses a camshaft bushing for engineering machinery, which includes a support base plate. The inner wall of the support base plate has several storage grooves, each of which is a rhomboid structure. The bushing has large-mouth grooves and small-mouth grooves of the rhomboid structure on the inner wall of the support base plate. The long diagonals of the large-mouth grooves and small-mouth grooves extend along the circumference of the support base plate, so that the lubricating oil in the large-mouth grooves and small-mouth grooves can easily flow out from the long diagonal direction and enter between the inner wall of the support base plate and the outer wall of the cam bearing. A limiting ring edge is provided at the axial end of the support base plate. The joint part of the two circumferential ends of the limiting ring edge has a guide gap. The width of the outer end of the guide gap is greater than the width of its inner end. The externally supplemented lubricating oil can enter the buffer gap through the guide gap, so that the diffusion range of the lubricating oil is wider and more uniform.

[0004] Existing bushings have poor lubrication, resulting in significant frictional losses during use and a shortened service life. Therefore, it is necessary to improve this structure to overcome these shortcomings. Utility Model Content

[0005] The purpose of this invention is to provide a long-life bushing for steering devices, which solves the problem that existing bushings have poor lubrication, high frictional loss during use, and thus reduced service life.

[0006] The above-mentioned technical objective of this utility model is achieved by the following technical solution:

[0007] A long-life bushing for a steering device includes a bushing body with a mounting hole for cooperating with the steering device. The mounting hole is axially arranged through the bushing body. The outer wall of the bushing body has a spirally distributed lubrication groove, and the inner wall of the bushing body has a spirally distributed lubrication groove. The inner wall of the bushing body has a plurality of lubrication holes for storing lubricating oil. One end of the lubrication hole is located on the inner wall of the bushing body and communicates with the mounting hole, and the other end of the lubrication hole extends away from the mounting hole. The bushing body includes a base support layer and a surface lubrication layer disposed on the base support layer.

[0008] A further feature of this invention is that the lubrication hole has a rhomboid structure, which is used to contain lubricating oil. The lubricating oil can overflow from the lubrication hole to lubricate the inner wall of the bushing body.

[0009] A further feature of this invention is that a support base is provided on the outer wall of the bushing body. The support base has a ring structure, one end of which is connected to the bushing body, and the other end of which extends outward toward the bushing body.

[0010] A further feature of this invention is that a chamfered surface is provided on the end of the bushing body.

[0011] A further feature of this invention is that a mounting groove is provided on the bushing body, the mounting groove extends along the axial direction of the bushing body and penetrates the bushing body.

[0012] A further feature of this invention is that the thickness of the surface lubricating layer is half the thickness of the base support layer.

[0013] A further feature of this invention is that multiple lubrication grooves are provided, and the multiple lubrication grooves are equidistantly distributed along the inner wall of the sleeve body.

[0014] In summary, this utility model has the following beneficial effects:

[0015] 1. The double-layer composite structure balances strength and lubrication. The base support layer provides high strength and resistance to deformation, ensuring the structural stability of the bushing under heavy load conditions. The surface lubrication layer utilizes self-lubrication and wear resistance to significantly reduce the coefficient of friction and reduce direct wear between the shaft and bushing.

[0016] 2. Outer wall spiral lubrication groove one and inner wall spiral lubrication groove two: These form a continuous lubrication channel through a spiral structure, dynamically distributing lubricating oil during rotation to avoid lubrication dead zones. Diamond-shaped lubrication holes are provided to continuously release lubricating oil, replenish the oil film, and prevent dry friction. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the internal structure of this utility model.

[0019] Figure 3 This is the front view of this utility model.

[0020] Numerical designations: 1. Bushing body, 2. Mounting hole, 3. Lubrication groove one, 4. Lubrication groove two, 5. Base support layer, 6. Surface lubrication layer, 7. Support base, 8. Chamfered surface, 9. Mounting through groove, 10. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with the illustrations and specific embodiments.

[0022] like Figures 1 to 3 As shown, the present invention proposes a long-life bushing for a steering device, comprising a bushing body 1, a mounting hole 2 for cooperating with a steering device, the mounting hole 2 being axially arranged through the bushing body 1, a spirally distributed lubrication groove 3 being provided on the outer wall of the bushing body 1, a spirally distributed lubrication groove 4 being provided on the inner wall of the bushing body 1, and a plurality of lubrication holes 5 for storing lubricating oil being provided on the inner wall of the bushing body 1, one end of the lubrication hole 5 being located on the inner wall of the bushing body 1 and communicating with the mounting hole 2, and the other end of the lubrication hole 5 extending away from the mounting hole 2, the bushing body 1 comprising a base support layer 6 and a surface lubrication layer 7 disposed on the base support layer 6.

[0023] Before installing the bushing, lubricating oil is injected into the bushing to fill the lubrication hole 5, the spiral lubrication groove 3, and the spiral lubrication groove 4. During use, the mounting hole 2 of the bushing body 1 is aligned with the shaft of the steering device, and the bushing is fixed to the shaft. The spiral lubrication groove 3 on the outer wall of the bushing is in contact with the inner wall of the steering device housing, forming a lubrication channel; the spiral lubrication groove 4 on the inner wall is in contact with the shaft surface, forming an internal lubrication path. The opening end of the lubrication hole 5 faces the inner wall of the bushing and communicates with the mounting hole 2; the other end extends into the bushing to store lubricating oil. When the steering device is running, the shaft drives the bushing to rotate, and the spiral lubrication grooves 3 and 4 distribute the lubricating oil evenly to the contact surface between the bushing and the shaft through their spiral structure. Under centrifugal force, the lubrication hole 5 continuously releases the stored lubricating oil, replenishing the oil film on the contact surface and preventing dry friction.

[0024] Preferably, the lubrication hole 5 has a rhomboid structure. The lubrication hole 5 is used to contain lubricating oil. The lubricating oil can overflow from the lubrication hole 5 to lubricate the inner wall of the bushing body 1. Compared with a circular hole, the rhomboid lubrication hole 5 can make fuller use of the space on the inner wall of the bushing body 1 and store more lubricating oil.

[0025] Preferably, a support base 8 is provided on the outer wall of the bushing body 1. The support base 8 has a ring structure. One end of the support base 8 is connected to the bushing body 1, and the other end of the support base 8 extends outward toward the outer side of the bushing body 1. The support base 8 serves as a ring-shaped reinforcing rib on the outer wall of the bushing, thereby improving the overall deformation resistance of the bushing.

[0026] Preferably, the end of the bushing body 1 is also provided with a chamfered surface 9, which forms a guide structure during bushing installation, thereby improving assembly efficiency and accuracy.

[0027] Preferably, the bushing body 1 is provided with an installation through groove 10. The installation through groove 10 extends along the axial direction of the bushing body 1 and penetrates the bushing body 1. The installation through groove 10 is used to provide installation allowance and compensate for possible machining errors of the bushing.

[0028] Preferably, the thickness of the surface lubricating layer 7 is half the thickness of the base support layer 6, the surface lubricating layer 7 is a component made of aluminum-tin alloy, and the base support layer is a component made of carbon steel.

[0029] Preferably, multiple lubrication grooves 4 are provided, and the multiple lubrication grooves 4 are distributed at equal intervals along the inner wall of the sleeve body.

[0030] Example 1

[0031] This embodiment provides a long-life bushing for a steering device. The bushing body 1 adopts a double-layer composite structure, including a base support layer 6 and a surface lubrication layer 7. The base support layer 6 is made of carbon steel with a thickness of 4mm. As the main support structure of the bushing, it provides high strength and resistance to deformation. The surface lubrication layer 7 is made of aluminum-tin alloy and is attached to the surface of the base support layer 6 with a thickness of 2mm. Utilizing the self-lubricating and wear-resistant properties of aluminum-tin alloy, it reduces the coefficient of friction between the bushing and the shaft. Lubrication groove 3 is spirally distributed along the outer wall of the bushing with a pitch of 5mm and a depth of 0.8mm, forming an external lubrication channel in contact with the inner wall of the steering device housing. Lubrication groove 4 has four spiral grooves evenly distributed along the inner wall of the bushing with a pitch of 3mm and a depth of 0.5mm, forming an internal lubrication path in contact with the shaft surface.

[0032] The lubrication hole 5 adopts a diamond-shaped structure. The lubrication hole 5 is equidistantly opened along the inner wall of the bushing. One end of the lubrication hole 5 is connected to the mounting hole 2, and the other end extends into the inside of the bushing to store lubricating oil. The lubricating oil is continuously released to the contact surface by centrifugal force during rotation.

[0033] A ring-shaped support base 8 is provided in the middle of the outer wall of the bushing. The base is 3mm wide and 1.5mm thick, and extends outward to form a reinforcing rib structure, which improves the bushing's resistance to radial deformation and prevents the outer wall from collapsing under high loads. Both ends of the bushing are provided with 45° chamfers with a chamfer width of 1mm. During installation, the chamfers cooperate with the shaft ends to form a guide, ensuring rapid alignment and reducing assembly damage.

[0034] In use, pre-fill with lubricating oil and inject lubricating oil into the bushing through the mounting groove 10 until the lubrication hole 5, the spiral groove and the mounting hole 2 are filled. Use the chamfered surface 9 to guide the bushing into the steering device shaft, apply axial pressure to make the support base 8 contact the housing, and fix the bushing on the shaft.

[0035] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connect" should be interpreted broadly. For example, "connection" 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 a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. In this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0036] Any descriptions not covered in the above specific embodiments of this utility model belong to the well-known technology in the field, and can be implemented by referring to the well-known technology.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A long-life bushing for a steering device, comprising a bushing body, wherein the bushing body has a mounting hole for mating with a steering device, the mounting hole being axially disposed through the bushing body, characterized in that, The outer wall of the bushing body is provided with a spirally distributed lubrication groove one, and the inner wall of the bushing body is provided with a spirally distributed lubrication groove two. The inner wall of the bushing body is provided with a plurality of lubrication holes for storing lubricating oil. One end of the lubrication hole is located on the inner wall of the bushing body and communicates with the mounting hole. The other end of the lubrication hole extends away from the mounting hole. The bushing body includes a base support layer and a surface lubrication layer disposed on the base support layer.

2. The long-life bushing for a steering device according to claim 1, characterized in that, The lubrication hole has a diamond-shaped structure and is used to hold lubricating oil. The lubricating oil can overflow from the lubrication hole to lubricate the inner wall of the bushing body.

3. A long-life bushing for a steering device according to claim 1, characterized in that, A support base is provided on the outer wall of the bushing body. The support base has a ring structure. One end of the support base is connected to the bushing body, and the other end of the support base extends outward toward the bushing body.

4. A long-life bushing for a steering device according to claim 1, characterized in that, The end of the bushing body is also provided with a chamfered surface.

5. A long-life bushing for a steering device according to claim 1, characterized in that, The bushing body has an installation through groove, which extends along the axial direction of the bushing body and penetrates through the bushing body.

6. A long-life bushing for a steering device according to claim 1, characterized in that, The thickness of the surface lubricating layer is half the thickness of the base support layer.

7. A long-life bushing for a steering device according to claim 1, characterized in that, The lubrication grooves are provided in multiple ways, and the multiple lubrication grooves are distributed at equal intervals along the inner wall of the sleeve body.

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