Ball type rack bushing

Abstract

The utility model discloses a ball type rack bushing which comprises a rack, a bushing body is installed on the outer wall of the rack, a shell is installed on the outer wall of the bushing body, a check ring is arranged on one side of the outer wall of the bushing body, the inner wall of the check ring is connected to the outer wall of the rack in an inserted mode, and the outer wall of the check ring is connected to the inner wall of the shell in an inserted mode. Through cooperation of the spring, the limiting plate and the inserting block, when the check ring is installed, the check ring is inserted into the inner wall of the shell, the limiting plate is extruded through the spring, the limiting plate drives the inserting block to move, one end of the inserting block abuts against the inner wall of the shell, and therefore the check ring is fixed and convenient to disassemble; the problem that in the prior art, due to the fact that a clamping block is used for fixing a check ring, the check ring is inconvenient to disassemble is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of ball bushings, in particular to a ball type rack bushing. Background Art

[0002] In the modern automobile industry, the Electric Power Steering (EPS) system has become one of the key technologies to improve driving safety and comfort. The rack and pinion mechanical steering gear is the core part of the EPS system, and its performance directly affects the handling stability and response sensitivity of the entire vehicle. In these steering systems, the design and material selection of the rack bushing are particularly critical because they directly contact and support the rack and are the basis for achieving precise steering.

[0003] Traditional rack bushings mainly rely on friction sliding mechanisms to work. Although this design is simple in structure, it has problems such as high friction and easy wear of parts. As the use time increases, the gap between the bushing and the rack will increase due to wear, which not only increases the noise during driving, but may also cause abnormal impact noise, seriously affecting the stability and comfort of driving. In addition, once the bushing is worn to a certain extent, it often needs to be replaced as a whole, increasing maintenance costs.

[0004] In order to solve these problems, the ball bearing design was introduced in the prior art. In this design, a groove is provided on the outer wall of the bushing, and balls are installed inside the groove. These balls roll during the steering process, significantly reducing the friction in contact with the rack, thereby reducing wear and improving the sensitivity and smoothness of the steering. Although the ball bearing design has obvious advantages in reducing friction and extending service life, it still has shortcomings in the bushing fixing method. The bushing is fixed by means of a retaining ring and a block. Although this structure can provide the necessary fixation during installation, it brings inconvenience when the bushing needs to be removed or replaced, affecting the efficiency and convenience of maintenance.

[0005] In view of this, it is indeed necessary to provide a technical solution to the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a ball-type rack bushing in view of the deficiencies of the prior art, and solve the problem that the existing bushing is fixed by means of a retaining ring and a clamping block, which causes inconvenience during disassembly.

[0007] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0008] A ball-type rack bushing comprises a rack, a bushing is installed on the outer wall of the rack, a shell is installed on the outer wall of the bushing, a retaining ring is arranged on one side of the outer wall of the bushing, the inner wall of the retaining ring is plugged into the outer wall of the rack, and the outer wall of the retaining ring is plugged into the inner wall of the shell.

[0009] Preferably, the inner wall of the retaining ring is pressed against a spring, the top of the spring is pressed against a limiting plate, the outer wall of the limiting plate is movably connected to the inner wall of the retaining ring, the outer wall of the limiting plate is fixedly connected to an insert block, the outer wall of the insert block is movably connected to the inner wall of the retaining ring, and one end of the insert block extending to the outer wall of the retaining ring is pressed against the inner wall of the shell.

[0010] Preferably, an outer wall of the bushing is provided with an outer protrusion, and the outer wall of the outer protrusion is pressed against the inner wall of the shell.

[0011] Preferably, a sealing rubber pad is inserted into the outer wall of the bushing, and the outer wall of the sealing rubber pad is pressed against the outer wall of the retaining ring.

[0012] Preferably, a groove is formed on the inner wall of the bushing, and a ball is movably connected to the inner wall of the groove.

[0013] Compared with the prior art, the utility model has the following beneficial effects: the utility model provides a ball-type rack bushing, which, through the cooperation of a spring, a limit plate and an insert block, is inserted into the inner wall of the housing when installing the retaining ring, and the limit plate is squeezed by the spring, so that the limit plate drives the insert block to move, so that one end of the insert block is pressed against the inner wall of the housing, thereby fixing the retaining ring and making it easy to disassemble, solving the problem of the prior art that the retaining ring is fixed by a card block during use, which makes it inconvenient to disassemble. In addition, through the cooperation of the sealing pad, the retaining ring and the bushing, the sealing pad is inserted into the interior of the housing, and when the retaining ring is installed, it presses the sealing pad tightly to prevent the lubricating oil outside the bushing from leaking out, making the rack more stable when moving. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0015] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0016] Figure 3 for Figure 2 Schematic diagram of the structure of the middle rack, housing and retaining ring assembly;

[0017] Figure 4 for Figure 2 Schematic diagram of the structure of the middle shell, retaining ring and sealing gasket assembly.

[0018] In the figure: 1, rack, 2, housing, 3, retaining ring, 4, external protrusion, 5, sealing gasket, 6, bushing, 7, groove, 8, ball, 9, spring, 10, limit plate, 11, plug. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] In actual use, when the bushing is fixed, it is fixed by a retaining ring, but when the retaining ring is installed, it is fixed by a clamping block, which makes it inconvenient to disassemble.

[0021] In view of this, the utility model provides a ball-type rack bushing, which solves the problem that when the bushing is fixed in actual use, it is fixed with a retaining ring, but when the retaining ring is installed, it is fixed with a clamping block, which causes inconvenience when disassembling it.

[0022] By those skilled in the art, the components in this case are connected in sequence. The specific connection and operation sequence should refer to the following working principle. The detailed connection means are well-known technologies in the art. The following mainly introduces the working principle and process.

[0023] Embodiment 1

[0024] Depend on Figure 1-4 It can be seen that the utility model provides a ball rack bushing, including a rack 1, a bushing 6 is installed on the outer wall of the rack 1, a shell 2 is installed on the outer wall of the bushing 6, a retaining ring 3 is provided on one side of the outer wall of the bushing 6, the inner wall of the retaining ring 3 is inserted into the outer wall of the rack 1, and the outer wall of the retaining ring 3 is inserted into the inner wall of the shell 2.

[0025] In the specific implementation process, with the cooperation of the bushing 6, the housing 2 and the rack 1, the rack 1 is installed inside the bushing 6, and the bushing 6 is sealed inside the housing 2 through the retaining ring 3, so that it is more stable during operation.

[0026] Furthermore, the inner wall of the retaining ring 3 is pressed against a spring 9, the top of the spring 9 is pressed against a limiting plate 10, the outer wall of the limiting plate 10 is movably connected to the inner wall of the retaining ring 3, the outer wall of the limiting plate 10 is fixedly connected to an insert block 11, the outer wall of the insert block 11 is movably connected to the inner wall of the retaining ring 3, and one end of the insert block 11 extends to the outer wall of the retaining ring 3 and is pressed against the inner wall of the shell 2.

[0027] In the specific implementation process, with the cooperation of the spring 9, the limit plate 10 and the plug 11, when installing the retaining ring 3, it is inserted into the inner wall of the shell 2, and the spring 9 is used to squeeze the limit plate 10, so that the limit plate 10 drives the plug 11 to move, so that one end of the plug 11 is pressed against the inner wall of the shell 2, thereby fixing the retaining ring 3 and facilitating disassembly.

[0028] Furthermore, an outer wall of the bushing 6 is mounted with an outer protrusion 4 , and the outer wall of the outer protrusion 4 is pressed tightly against the inner wall of the housing 2 .

[0029] In the specific implementation process, with the cooperation of the outer protrusion 4 and the bushing 6, the outer protrusion 4 is installed on the outer wall of the bushing 6, so that there is a certain distance between the bushing 6 and the housing 2 to avoid large friction during rotation.

[0030] Specifically, when using the ball-type rack bushing, when installing the retaining ring 3, it is inserted into the inner wall of the shell 2, and the spring 9 is used to squeeze the limit plate 10, so that the limit plate 10 drives the plug 11 to move, and one end of the plug 11 is pressed against the inner wall of the shell 2, thereby fixing the retaining ring 3, and using the external protrusion 4 to create a moving distance between the bushing 6 and the shell 2 to avoid large friction during rotation.

[0031] Embodiment 2

[0032] Different from the first embodiment, a sealing rubber pad 5 is inserted into the outer wall of the bushing 6 , and the outer wall of the sealing rubber pad 5 is pressed tightly against the outer wall of the retaining ring 3 .

[0033] In the specific implementation process, with the cooperation of the sealing gasket 5, the retaining ring 3 and the bushing 6, the sealing gasket 5 is inserted into the interior of the housing 2, and the retaining ring 3 is used to tighten it to avoid leakage.

[0034] Furthermore, a groove 7 is formed on the inner wall of the bushing 6 , and a ball 8 is movably connected to the inner wall of the groove 7 .

[0035] In a specific implementation process, with the cooperation of the bushing 6, the groove 7 and the ball 8, the ball 8 is installed inside the groove 7, and the ball 8 is used to reduce the friction force.

[0036] Specifically, based on the above embodiment, the ball 8 is installed in the groove 7, and the bushing 6 is inserted into the inside of the housing 2, and the sealing gasket 5 is used to seal it, and the retaining ring 3 fixes the sealing gasket 5 to avoid leakage of lubricating oil, and the retaining ring 3 is also easy to disassemble.

[0037] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0038] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated 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 the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A ball-type rack bushing, comprising a rack (1), characterized in that: The outer wall of the rack (1) is installed with a bushing (6), the outer wall of the bushing (6) is installed with a housing (2), a retaining ring (3) is provided on one side of the outer wall of the bushing (6), the inner wall of the retaining ring (3) is plugged into the outer wall of the rack (1), and the outer wall of the retaining ring (3) is plugged into the inner wall of the housing (2); The inner wall of the retaining ring (3) is pressed against a spring (9), the top of the spring (9) is pressed against a limit plate (10), the outer wall of the limit plate (10) is movably connected to the inner wall of the retaining ring (3), the outer wall of the limit plate (10) is fixedly connected to an insert block (11), the outer wall of the insert block (11) is movably connected to the inner wall of the retaining ring (3), and one end of the insert block (11) extending to the outer wall of the retaining ring (3) is pressed against the inner wall of the housing (2); An outer wall of the bushing (6) is provided with an outer protrusion (4), and the outer wall of the outer protrusion (4) is tightly pressed against the inner wall of the housing (2); The outer wall of the bushing (6) is plugged with a sealing rubber pad (5), and the outer wall of the sealing rubber pad (5) is tightly pressed against the outer wall of the retaining ring (3); The inner wall of the bushing (6) is provided with a groove (7), and the inner wall of the groove (7) is movably connected with a ball (8).

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