Telescopic sealing structure of intermediate shaft
By setting a toothed sealing component between the female and male shafts and interfering with the male shaft, the problem of dust entering due to poor sealing is solved, achieving effective sealing of the intermediate shaft and extending its service life.
Patent Information
- Application Number
- CN202520919707.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-08
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-05-08
AI Technical Summary
The existing sealing structure of the automotive steering intermediate shaft cannot effectively prevent dust and dirt from entering the interior of the main shaft, resulting in abnormal noise and wear, and affecting its service life.
A sealing component is installed between the female and male shafts. The sealing component is made of elastic rubber and has a toothed structure inside that is interference-fitted with the male shaft. The reverse tooth structure scrapes away dust and stores it in the groove to ensure a tight seal.
It improves the sealing of the connection between the female and male shafts, preventing dust from entering the female shaft and extending the service life of the intermediate shaft.
Smart Images
Figure CN223953115U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of automobile steering intermediate shaft, specifically relates to an intermediate shaft telescopic sealing structure. BACKGROUND
[0002] The automobile steering intermediate shaft connects the steering column and the steering gear, and during the driving process of the vehicle, the steering intermediate shaft needs to have the telescopic function while transmitting the torque due to the bumping of the ground.
[0003] The intermediate shaft is mainly composed of the female shaft and the male shaft which slide relative to each other, wherein the female shaft is internally provided with a spline groove, and the male shaft is externally provided with a spline at one end, and the spline is slidably arranged in the spline groove, so that when the automobile bumps, the male shaft can slide relative to the female shaft to reduce the impact force received by the intermediate shaft.
[0004] Due to the installation position of the intermediate shaft, dust, sand and the like are usually attached to the surface thereof, and when the automobile bumps, the dust, sand and the like on the surface of the male shaft are easily brought into the female shaft during the sliding process of the male shaft relative to the female shaft, which not only causes the intermediate shaft to produce abnormal noise during use, but also wears the spline groove and the spline, thereby affecting the normal steering system of the automobile.
[0005] In the prior art, a sealing structure is usually arranged at the end of the female shaft, but the sealing structure and the male shaft are only single ring-mounted, that is, the sealing structure is provided with an annular through hole, and the male shaft is slidably sleeved in the annular through hole, which can avoid the dust on the surface of the male shaft from entering the female shaft, but the overall sealing effect is not good, and part of the dust still enters the female shaft. UTILITY MODEL CONTENTS
[0006] Therefore, the utility model provides an intermediate shaft telescopic sealing structure which can improve the sealing performance between the female shaft and the male shaft, thereby avoiding the dust on the surface of the intermediate shaft from entering the female shaft.
[0007] To achieve the above-mentioned purpose, the utility model technical scheme is as follows:
[0008] An intermediate shaft telescopic sealing structure comprises a female shaft and a male shaft, the female shaft is a hollow structure, the male shaft is arranged at one end of the female shaft and can reciprocally slide relative to the female shaft, characterized in that: a sealing part is sleeved at one end of the female shaft, the sealing part is an annular structure, an axially distributed tooth structure is arranged on the inner hole wall of a second connecting ring, the sealing part is made of elastic rubber, and the tooth structure is interference-fitted on the male shaft.
[0009] By adopting the structure, the sealing part is arranged between the female shaft and the male shaft, the tooth structure formed inside the sealing part is in interference fit with the surface of the male shaft, the airtightness of the connection position between the female shaft end and the male shaft is ensured, and dust on the surface of the male shaft is prevented from entering the female shaft, thereby ensuring the service life of the intermediate shaft.
[0010] Preferably, the first connecting ring has a larger aperture than the second connecting ring, and a support structure is arranged between the first connecting ring and the second connecting ring, and the female shaft end is supported on the support structure. By adopting the structure, the sealing part can be stably supported on the female shaft.
[0011] Preferably, the first connecting ring is in threaded connection with the female shaft. By adopting the structure, the sealing part is stably sleeved on the female shaft through threaded assembly.
[0012] Preferably, the first connecting ring is internally provided with a first reverse tooth, and the first reverse tooth is in interference fit on the female shaft. By adopting the structure, the sealing part can be stably sleeved on the female shaft through interference fit of the first reverse tooth.
[0013] Preferably, the interference amount of the first reverse tooth is greater than the interference amount of the tooth structure. By adopting the structure, when the male shaft slides relative to the female shaft, the sealing part can be prevented from being separated from the female shaft.
[0014] Preferably, the tooth structure is a second reverse tooth, the second reverse tooth has a slope and a longitudinal plane on both sides of the tooth top, and the longitudinal plane is perpendicular to the axial direction of the sealing part. By adopting the structure, the sealing property between the sealing part and the male shaft can be further ensured.
[0015] Preferably, the slope is inclined toward the side where the female shaft is located. By adopting the structure, when the male shaft moves toward the female shaft, the dust on the surface of the male shaft can be scraped by the obliquely arranged reverse tooth structure.
[0016] Preferably, two second reverse teeth are arranged, and a groove is arranged between the two second reverse teeth. By adopting the structure, the sealing property between the sealing part and the male shaft is further ensured by the two second reverse teeth, the groove is convenient for storing the dust scraped by the second reverse tooth, and in addition, the groove can also be used for storing lubricating oil, so that the male shaft can more easily slide relative to the sealing part.
[0017] Preferably, the female shaft end is provided with a mounting portion, and the first reverse tooth is in close contact with the mounting portion. By adopting the structure, the mounting of the sealing part can be facilitated.
[0018] Preferably, the female shaft is internally provided with a spline groove, the male shaft end is provided with a spline, and the spline is arranged in sliding fit in the spline groove. By adopting the structure, the male shaft can more stably slide relative to the female shaft.
[0019] Compared with the prior art, the utility model has the advantages of:
[0020] Adopt the intermediate shaft telescopic sealing structure of the utility model, through the sealing component that sets up between female shaft and male shaft, and the toothing structure that forms in sealing component inside and male shaft surface interference fit, guaranteed female shaft end and male shaft connecting position leakproof simultaneously, still can avoid the dust on the surface of male shaft into female shaft inside, guaranteed the service life of intermediate shaft. BRIEF DESCRIPTION OF DRAWINGS
[0021] Figure 1 It is the schematic diagram of the three-dimensional structure of intermediate shaft;
[0022] Figure 2 It is the schematic diagram of the three-dimensional structure of intermediate shaft; Figure 1 It is the partial sectional view schematic diagram of;
[0023] Figure 3 It is the partial enlarged schematic diagram of; Figure 2 It is the partial enlarged schematic diagram of;
[0024] Figure 4 It is the schematic diagram of the structure of male shaft 2;
[0025] Figure 5 It is the sectional view schematic diagram of sealing component 3. DETAILED DESCRIPTION
[0026] The utility model is further described below in combination with examples and drawings.
[0027] As shown in Figures 1 to 5 A kind of intermediate shaft telescopic sealing structure, including female shaft 1 and male shaft 2, wherein, female shaft 1 is hollow structure, one end of male shaft 2 is arranged in female shaft 1 inside, and can reciprocatingly slide relative to female shaft 1, one end of female shaft 1 is equipped with sealing component 3, sealing component 3 is annular structure, and first connecting ring 3a and second connecting ring 3b are successively formed in its axial direction, first connecting ring 3a is fixedly equipped in female shaft 1 end, second connecting ring 3b inner hole hole wall is formed with the toothing structure 3c distributed along axial direction, sealing component 3 is made of elastic rubber, and toothing structure 3c is interference fitted on male shaft 2.
[0028] So design, through the sealing component 3 that sets up between female shaft 1 and male shaft 2, and the toothing structure 3c that forms in sealing component 3 inside and male shaft 2 surface interference fit, guaranteed female shaft 1 end and male shaft 2 connecting position leakproof simultaneously, still can avoid the dust on the surface of male shaft 2 into female shaft inside, guaranteed the service life of intermediate shaft.
[0029] As shown in the figure, the diameter of the first connecting ring 3a is larger than the diameter of the second connecting ring 3b, and a support structure 3d is provided between the first connecting ring 3a and the second connecting ring 3b, with the end of the mother shaft 1 supported on the support structure 3d. This design allows the sealing component 3 to be stably installed on the mother shaft 1.
[0030] Furthermore, in this embodiment, the first connecting ring 3a is threaded onto the female shaft 1. In addition, the first connecting ring 3a has a first reverse tooth 3e formed inside, and a mounting part 1b is formed at the end of the female shaft 1. The first reverse tooth 3e is interference-fitted onto the mounting part 1b, as shown in the figure. In order to ensure that the first reverse tooth 3e will not fall off the female shaft 1 during the sliding process of the male shaft 2 relative to the female shaft 1, the interference of the first reverse tooth 3a is greater than the interference of the tooth structure 3c.
[0031] As shown in the figure, the tooth-like structure is a second inverted tooth. The two sides of the tooth tip of the second inverted tooth have an inclined surface 3c1 and a longitudinal plane 3c2, respectively. The longitudinal plane 3c2 is perpendicular to the axial direction of the sealing component 3. In this embodiment, two second inverted teeth are formed on the inner wall of the second connecting ring 3b, and a groove 3f is formed between the two second inverted teeth. The two second inverted tooth structure further ensures the sealing performance between the sealing component 3 and the male shaft 2. The groove 3f can store lubricating oil, making it easier for the male shaft 2 to slide relative to the sealing component 3.
[0032] In this embodiment, the inclined plane 3c1 tilts towards the side where the female shaft 1 is located. When the car is bumpy during driving, causing the female shaft 1 to move towards the side where the male shaft 2 is located, the dust on the surface of the male shaft 2 is first scraped off by the end of the sealing component 3. The tilted second reverse teeth can further scrape off the dust on the surface of the male shaft 2. At this time, the groove 3f between the two second reverse teeth can also be used to store the dust scraped off by the second reverse teeth, preventing dust from entering the interior of the female shaft 1, thereby ensuring the service life of the intermediate shaft.
[0033] like Figure 2 and Figure 4 As shown, a spline groove 1a is formed inside the female shaft 1, and a spline 2a is formed at the end of the male shaft 2 to match it. Through the cooperation of the spline groove 1a and the spline 2a, the male shaft 2 can slide more stably relative to the female shaft 1.
[0034] Finally, it should be noted that the above description is merely a preferred embodiment of the present utility model. Those skilled in the art, under the guidance of the present utility model, can make various similar representations without departing from the spirit and claims of the present utility model, and such modifications all fall within the protection scope of the present utility model.
Claims
1. A kind of intermediate shaft telescopic seal structure, including female shaft (1) and male shaft (2), the female shaft (1) is hollow structure, the male shaft (2) one end is arranged in the female shaft (1) inside, and can reciprocate relative to female shaft (1) sliding, it is characterized in that: The female shaft (1) is sleeved with a sealing part (3) at one end, the sealing part (3) is annular structure, and a first connecting ring (3a) and a second connecting ring (3b) are arranged in sequence in the axial direction, the first connecting ring (3a) is fixedly sleeved at the end of the female shaft (1), the second connecting ring (3b) is provided with a toothed structure (3c) distributed in the axial direction on the hole wall of the inner hole, the sealing part (3) is made of elastic rubber, and the toothed structure (3c) is interference sleeved on the male shaft (2).
2. The intermediate shaft boot structure of claim 1, wherein: The hole diameter of the first connecting ring (3a) is greater than that of the second connecting ring (3b), and a supporting structure (3d) is arranged between the first connecting ring (3a) and the second connecting ring (3b), and the end of the female shaft (1) is supported on the supporting structure (3d).
3. The intermediate shaft boot structure of claim 1, wherein: The first connecting ring (3a) is threadedly connected with the female shaft (1).
4. The intermediate shaft boot structure of claim 1, wherein: The first connecting ring (3a) is internally provided with a first reverse tooth (3e), and the first reverse tooth (3e) is interference sleeved on the female shaft (1).
5. The intermediate shaft boot structure of claim 4, wherein: The interference amount of the first reverse tooth (3e) is greater than that of the toothed structure (3c).
6. The intermediate shaft boot structure of claim 1, wherein: The toothed structure (3c) is a second reverse tooth, the second reverse tooth has a bevel (3c1) and a longitudinal plane (3c2) on both sides of the tooth top respectively, and the longitudinal plane (3c2) is perpendicular to the axial direction of the sealing part (3).
7. The intermediate shaft boot structure of claim 6, wherein: The bevel (3c1) is inclined towards the side where the female shaft (1) is located.
8. The intermediate shaft boot structure of claim 7, wherein: The second reverse tooth is provided with two, and a groove (3f) is arranged between the two second reverse teeth.
9. The intermediate shaft boot construction of claim 4 wherein: The end of the female shaft (1) is provided with a mounting portion (1b), and the first reverse tooth (3e) is tightly attached to the mounting portion (1b).
10. The intermediate shaft boot structure of claim 1, wherein: The female shaft (1) is internally provided with a spline groove (1a), and the male shaft (2) is provided with a spline (2a) at the end, and the spline (2a) is slidingly arranged in the spline groove (1a).