Shell oil seal limiting mechanism of electric recirculating ball steering gear

Abstract

The utility model discloses an electric recirculating ball steering gear shell oil seal limiting mechanism which comprises a shell, a dust cover and a framework oil seal, the shell is installed on the outer wall of a rocker arm shaft through a needle bearing, the framework oil seal is arranged on the outer wall of the rocker arm shaft in a sleeved mode, the shell is provided with a containing space, one end of the shell is provided with an installation opening, and the installation opening is provided with a clamping groove. The framework oil seal is arranged between the needle bearing and the installation opening, the installation opening is communicated with the containing space, one end of the rocker arm shaft penetrates through the installation opening, the inner wall of the installation opening extends inwards in the radial direction to form a baffle ring, the inner diameter of the baffle ring is smaller than the outer diameter of the framework oil seal, and one end of the framework oil seal abuts against one end of the baffle ring in a clamped mode. One end of the dustproof cover is installed at one end of the shell, and the dustproof cover covers the outer wall of one end of the rocker arm shaft. Through the application of the shell oil seal limiting mechanism of the electric recirculating ball steering gear, the framework oil seal is directly limited through the baffle ring of the shell, and the shell oil seal limiting mechanism is simple in structure and convenient and fast to install.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to an oil seal limiting mechanism for a housing of an electric circulating ball steering gear. Background Art

[0002] At present, the output end of the automobile power steering assembly housing is sealed with a high-pressure sealing ring. Its structure is that the automobile power steering assembly housing is installed on the rocker shaft through a cylindrical roller bearing, and the cylindrical roller bearing is equipped with an elastic retaining ring on the inside and a high-pressure sealing ring on the outside. A dust seal is also installed on the outside of the housing. The above existing sealing structure is relatively complex and inconvenient to install. Utility Model Content

[0003] In view of this, in order to solve the above problems, the purpose of the utility model is to provide an electric recirculating ball steering gear housing oil seal limiting mechanism, comprising:

[0004] A shell, a dust cover and a skeleton oil seal, wherein the shell is installed on the outer wall of the rocker shaft through a needle bearing, and the skeleton oil seal is sleeved on the outer wall of the rocker shaft. The shell has an accommodating space, and a mounting opening is opened at one end of the shell. The skeleton oil seal is arranged between the needle bearing and the mounting opening, and the mounting opening is communicated with the accommodating space. One end of the rocker shaft passes through the mounting opening, and the inner wall of the mounting opening extends radially inward to form a retaining ring, the inner diameter of the retaining ring is smaller than the outer diameter of the skeleton oil seal, one end of the skeleton oil seal is clamped with one end of the retaining ring, one end of the dust cover is installed on one end of the shell, and the dust cover is arranged on the outer wall of one end of the rocker shaft.

[0005] In another preferred embodiment, the accommodating space has a first channel portion and a second channel portion, one end of the first channel portion is connected to one end of the second channel portion, the other end of the second channel portion is connected to the mounting port, the needle roller bearing is installed in the first channel portion, and the skeleton oil seal is installed in the second channel portion.

[0006] In another preferred embodiment, the inner diameter of the first channel portion is greater than the inner diameter of the second channel portion.

[0007] In another preferred embodiment, the skeleton oil seal includes: an annular body, an annular spring and an annular skeleton, the annular body is sleeved on the outer wall of the rocker arm shaft, the annular body has an annular channel, the annular channel is arranged along the circumference of the annular body, the annular skeleton is installed in the annular channel, one end of the annular body is provided with a groove and a first annular surface and a second annular surface are formed, the first annular surface is close to the outer edge of the annular body, the first annular surface is clamped with one end of the retaining ring, the groove is arranged along the circumference of the annular body, a spring groove is provided on the inner wall of one side of the groove, the spring groove is arranged along the circumference of the groove, and the annular spring is installed in the spring groove.

[0008] In another preferred embodiment, the cross-section of the annular channel along the axial direction of the annular body is arranged in an "L" shape, and the outer contour of the annular skeleton matches the inner contour of the annular channel.

[0009] In another preferred embodiment, the inner wall of one end of the annular body extends radially inward to form a sealing lip, and the sealing lip abuts against the outer wall of the rocker shaft. The inner wall of the other end of the annular body extends radially inward to form an annular lip, and a gap is provided between the annular lip and the outer wall of the rocker shaft.

[0010] In another preferred embodiment, the middle portion of the dust cover is contracted inwardly along the radial direction of the dust cover.

[0011] Due to the adoption of the above technical solution, the utility model has the following positive effects compared with the prior art: through the application of the utility model, an electric recirculating ball steering gear housing oil seal limiting mechanism is provided, the skeleton oil seal is directly limited by the retaining ring of the housing, the structure is simple, and the installation is convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a cross-sectional schematic diagram of an oil seal limiting mechanism of an electric recirculating ball steering gear housing of the utility model;

[0013] Figure 2 The utility model is a schematic diagram of a skeleton oil seal of an oil seal limiting mechanism of an electric recirculating ball steering gear housing.

[0014] In the accompanying drawings: 1. housing; 2. dust cover; 3. skeleton oil seal; 4. needle bearing; 5. rocker shaft; 6. mounting opening; 7. retaining ring; 8. first channel portion; 9. second channel portion; 10. annular body; 11. annular spring; 12. annular channel; 13. groove; 14. first annular surface; 15. second annular surface; 16. spring groove; 17. sealing lip; 17. annular lip. DETAILED DESCRIPTION

[0015] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0016] like Figure 1 and Figure 2 As shown, a preferred embodiment of an electric recirculating ball steering gear housing oil seal limiting mechanism is shown, comprising:

[0017] The housing 1, the dust cover 2 and the skeleton oil seal 3, the housing 1 is installed on the outer wall of the rocker shaft 5 through a needle bearing 4, the skeleton oil seal 3 is sleeved on the outer wall of the rocker shaft 5, the housing 1 has an accommodating space, one end of the housing 1 is provided with a mounting port 6, the skeleton oil seal 3 is arranged between the needle bearing 4 and the mounting port 6, the mounting port 6 is communicated with the accommodating space, one end of the rocker shaft 5 passes through the mounting port 6, the inner wall of the mounting port 6 extends radially inward to form a retaining ring 7, the inner diameter of the retaining ring 7 is smaller than the outer diameter of the skeleton oil seal 3, one end of the skeleton oil seal 3 is clamped with one end of the retaining ring 7, one end of the dust cover 2 is installed on one end of the housing 1, and the dust cover 2 is covered on the outer wall of one end of the rocker shaft 5.

[0018] In actual use, the skeleton oil seal 3 is limited by the retaining ring 7 at the mounting opening 6 of the housing 1, thereby preventing the skeleton oil seal 3 from being loose and ensuring the overall sealing performance.

[0019] Furthermore, as a preferred embodiment, the accommodating space has a first channel portion 8 and a second channel portion 9, one end of the first channel portion 8 is connected to one end of the second channel portion 9, the other end of the second channel portion 9 is connected to the mounting port 6, the needle bearing 4 is installed in the first channel portion 8, and the skeleton oil seal 3 is installed in the second channel portion 9.

[0020] Further, as a preferred embodiment, the inner diameter of the first channel portion 8 is greater than the inner diameter of the second channel portion 9. Further, by providing the first channel portion 8 and the second channel portion 9, and the inner diameter of the first channel portion 8 is greater than the inner diameter of the second channel portion 9, the needle bearing 4 is prevented from sliding toward the skeleton oil seal 3.

[0021] Further, as a preferred embodiment, one end of the inner wall of the second channel portion 9 extends radially inward to form a limit ring. Further, the limit ring is provided to prevent the skeleton oil seal 3 from slipping.

[0022] Further, as a preferred embodiment, the skeleton oil seal 3 includes: an annular body 10, an annular spring 11 and an annular skeleton. The annular body 10 is sleeved on the outer wall of the rocker shaft 5. The annular body 10 has an annular channel 12, which is arranged along the circumference of the annular body 10. The annular skeleton is installed in the annular channel 12. A groove 13 is provided at one end of the annular body 10 and a first annular surface 14 and a second annular surface 15 are formed. The first annular surface 14 is close to the outer edge of the annular body 10, and the first annular surface 14 is clamped with one end of the retaining ring 7. The groove 13 is arranged along the circumference of the annular body 10. A spring groove 16 is provided on the inner wall of one side of the groove 13. The spring groove 16 is arranged along the circumference of the groove 13, and the annular spring 11 is installed in the spring groove 16.

[0023] Further, as a preferred embodiment, the cross section of the annular channel 12 along the axial direction of the annular body 10 is set in an "L" shape, and the outer contour of the annular skeleton matches the inner contour of the annular channel 12. Further, the cross section of the annular skeleton is set in an "L" shape, which improves the overall strength of the annular skeleton, thereby improving the overall strength of the skeleton oil seal 3.

[0024] Further, as a preferred embodiment, the inner wall of one end of the annular body 10 extends radially inward to form a sealing lip 17, and the sealing lip 17 is clamped against the outer wall of the rocker shaft 5, and the inner wall of the other end of the annular body 10 extends radially inward to form an annular lip 18, and there is a gap between the annular lip 18 and the outer wall of the rocker shaft 5. Further, in actual use, the sealing lip 17 is used to perform a sealing function, and there is a gap between the annular lip 18 and the outer wall of the rocker shaft 5 to facilitate lubricating oil to enter the annular body 10, so as to lubricate the rocker shaft 5.

[0025] Further, as a preferred embodiment, the middle part of the dust cover 2 is retracted inwardly along the radial direction of the dust cover 2. Further, the middle part of the dust cover 2 is retracted inwardly along the radial direction of the dust cover 2, so that a shielding protrusion is formed in the middle part of the inner wall of the dust cover 2 to shield the dust on the outer wall.

[0026] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. An oil seal limiting mechanism for an electric recirculating ball steering gear housing, characterized in that: include: A shell, a dust cover and a skeleton oil seal, wherein the shell is installed on the outer wall of the rocker shaft through a needle bearing, and the skeleton oil seal is sleeved on the outer wall of the rocker shaft. The shell has an accommodating space, and a mounting opening is opened at one end of the shell. The skeleton oil seal is arranged between the needle bearing and the mounting opening, and the mounting opening is communicated with the accommodating space. One end of the rocker shaft passes through the mounting opening, and the inner wall of the mounting opening extends radially inward to form a retaining ring, the inner diameter of the retaining ring is smaller than the outer diameter of the skeleton oil seal, one end of the skeleton oil seal is clamped with one end of the retaining ring, one end of the dust cover is installed on one end of the shell, and the dust cover is arranged on the outer wall of one end of the rocker shaft.

2. The oil seal limiting mechanism for the housing of the electric recirculating ball steering gear according to claim 1, characterized in that: The accommodating space has a first channel portion and a second channel portion, one end of the first channel portion is connected to one end of the second channel portion, the other end of the second channel portion is connected to the mounting port, the needle bearing is installed in the first channel portion, and the skeleton oil seal is installed in the second channel portion.

3. The oil seal limiting mechanism for the housing of the electric recirculating ball steering gear according to claim 2, characterized in that: An inner diameter of the first channel portion is greater than an inner diameter of the second channel portion.

4. The oil seal limiting mechanism for the housing of the electric recirculating ball steering gear according to claim 1, characterized in that: The skeleton oil seal includes: an annular body, an annular spring and an annular skeleton. The annular body is sleeved on the outer wall of the rocker shaft. The annular body has an annular channel, and the annular channel is arranged along the circumference of the annular body. The annular skeleton is installed in the annular channel. One end of the annular body is provided with a groove and forms a first annular surface and a second annular surface. The first annular surface is close to the outer edge of the annular body, and the first annular surface is clamped with one end of the retaining ring. The groove is arranged along the circumference of the annular body. A spring groove is provided on the inner wall of one side of the groove, and the spring groove is arranged along the circumference of the groove. The annular spring is installed in the spring groove.

5. The oil seal limiting mechanism for the housing of the electric recirculating ball steering gear according to claim 4, characterized in that: The cross section of the annular channel along the axial direction of the annular body is arranged in an "L" shape, and the outer contour of the annular skeleton matches the inner contour of the annular channel.

6. The oil seal limiting mechanism for the housing of the electric recirculating ball steering gear according to claim 4, characterized in that: The inner wall of one end of the annular body extends radially inward to form a sealing lip, and the sealing lip abuts against the outer wall of the rocker shaft. The inner wall of the other end of the annular body extends radially inward to form an annular lip, and there is a gap between the annular lip and the outer wall of the rocker shaft.

7. The oil seal limiting mechanism for the housing of the electric recirculating ball steering gear according to claim 1, characterized in that: The middle portion of the dust cover is contracted inwardly along the radial direction of the dust cover.

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