Sealing device of shift cable, shift cable and automobile

Abstract

The present invention discloses a sealing device for a shift cable, a shift cable and an automobile, and belongs to the field of automobiles. The sealing device for the shift cable of the present invention comprises a housing and a guide tube, the guide tube comprises a rotating part and a straight rod part, the rotating part is rotatably arranged in the housing, an inclined groove with an end opening is formed between the straight rod part and the housing, a sealing member is provided at the opening of the inclined groove, the sealing member comprises a bent part, and the bent part is elastic along the radial direction of the straight rod part. The sealing device for the shift cable of the present invention can provide a tight seal for one end of the shift cable located at the gearbox, and ensure the good operation of the shift cable.

Description

Technical Field

[0001] The invention relates to the field of automobiles, and in particular to a sealing device for a shift cable, a shift cable and an automobile. Background Art

[0002] The shift cable is an important component for the car to achieve gear shifting control and is an integral part of the car's transmission system. The common shift cables on the market can be divided into two categories: manual and automatic according to the gearbox structure. The manual shift cable is mainly equipped with the MT gearbox. The cable is a double-wire structure, one is the gear selection cable, and the other is the shift cable; the automatic shift cable is mainly used for AT / CT / DCT gearboxes. The cable is a single-wire structure, with only the shift cable. One end of the cable is connected to the gearbox in the cabin, and the other end is connected to the shifter in the cab. When the driver operates the shifter in the cab, the shifter will rotate the corresponding angle through the cable to link the gearbox's shift rocker, thereby switching to the corresponding gear position to achieve the gear shifting control of the gearbox.

[0003] The shifter end is in the cab, and the environment in which the cable is located is relatively stable. However, the gearbox end is in the cabin, and the environment in which the cable is located is relatively harsh. It is completely exposed to the outside. Mud, water, ore and other debris often splash onto the cable due to road conditions, weather and other factors. Therefore, the waterproof and dustproof requirements of the gearbox end of the cable are higher than those of the shifter end.

[0004] Therefore, based on the cable at the gearbox end, it is necessary to provide a sealing device with sealing performance that can meet the harsh environment. Summary of the invention

[0005] In order to solve the deficiencies of the prior art, an embodiment of the present invention provides a sealing device for a shift cable, which can meet the sealing requirements of the shift cable at the transmission end.

[0006] The technical solution adopted by the embodiment of the present invention to solve the above technical problems is: to provide a sealing device for a shift cable, including a shell and a guide tube, the guide tube including a rotating part and a straight rod part, the rotating part is rotatably arranged in the shell, and an inclined groove with an end opening is formed between the straight rod part and the shell, a sealing member is provided at the opening of the inclined groove, and the sealing member includes a bending portion, and the bending portion is elastic along the radial direction of the straight rod part.

[0007] As a further improvement of the above technical solution, the bending portion includes an oblique thin wall, and the oblique thin wall is inclined from bottom to top in a direction away from the opening of the oblique groove.

[0008] As a further improvement of the above technical solution, the seal also includes a first connecting part and a second connecting part, the first connecting part is fitted on the straight rod part, the second connecting part is fastened to the outer wall of the shell, and the bending part is arranged between the first connecting part and the second connecting part.

[0009] As a further improvement of the above technical solution, a first guiding portion is provided between the first connecting portion and the bending portion.

[0010] As a further improvement of the above technical solution, in a direction away from the rotating portion, a thickness of an end of the first connecting portion away from the bending portion gradually increases.

[0011] As a further improvement of the above technical solution, a second guiding portion is provided between the second connecting portion and the bending portion.

[0012] As a further improvement of the above technical solution, a first mounting groove is provided on the outer wall of the shell, a first boss is provided on the second connecting portion, the first boss is embedded in the first mounting groove, and the first boss is interference fit with the first mounting groove.

[0013] As a further improvement of the above technical solution, a sealing cap is provided at the end of the straight rod portion away from the rotating portion, and the sealing cap includes an annular interface portion and a third connecting portion. The annular interface portion is fitted on the end face of the straight rod portion, and the inner wall of the annular interface portion is provided with a sealing ring protruding toward the center of its circle. A second mounting groove is provided on the outer wall of the straight rod portion, and a second boss is provided on the third connecting portion. The second boss is embedded in the second mounting groove, and the second boss is interference fit with the second mounting groove.

[0014] An embodiment of the present invention further provides a shift cable, comprising the sealing device for the shift cable as described above.

[0015] An embodiment of the present invention further provides an automobile, comprising the sealing device for the shift cable as described above.

[0016] Beneficial effects of the present invention:

[0017] The cable shift sealing device of the embodiment of the present invention seals the opening of the inclined groove between the guide tube and the shell by a sealing member, the sealing member includes a bending portion, and the bending portion is elastic along the radial direction of the guide tube. When shifting gears, the guide tube rotates and swings, and the sealing member can generate elastic movement synchronously with the swing of the guide tube and always keep the opening of the inclined groove sealed, thereby achieving good waterproof and dustproof effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0019] Figure 1 It is a cross-sectional schematic diagram of an embodiment of a sealing device for a shift cable of the present invention. DETAILED DESCRIPTION

[0020] The following will be combined with the embodiments and drawings to clearly and completely describe the concept, specific structure and technical effects of the present invention, so as to fully understand the purpose, scheme and effect of the present invention. It should be noted that the embodiments and features in the embodiments of this application can be combined with each other without conflict.

[0021] It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature, or it may be indirectly fixed or connected to the other feature. In addition, the descriptions of up, down, left, right, front, back, etc. used in the present invention are only relative to the relative positional relationship of the components of the present invention in the drawings.

[0022] In addition, unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art. The terms used in this specification are only for describing specific embodiments, not for limiting the present invention. The term "and / or" used herein includes any combination of one or more related listed items.

[0023] Reference Figure 1 An embodiment of the present invention provides a sealing device for a shift cable, including a housing 1 and a guide tube 2. One end of the guide tube 2 is arranged in the housing 1, and the end of the guide tube 2 arranged in the housing 1 can rotate relative to the housing 1 to adjust different gears.

[0024] In the embodiment of the present invention, the guide tube 2 includes a rotating part 20 and a straight rod part 21. The rotating part 20 is rotatably arranged in the shell 1. One end of the straight rod part 21 is connected to the rotating part 20. It swings with the rotation of the rotating part 20. Different gears are adapted to by the swing of the straight rod part 21. In actual applications, one end of the straight rod part 21 away from the rotating part 20 is connected to a joint rod (not shown in the figure), which is connected to the gearbox through the joint rod. The joint rod is also connected to a wire rope (not shown in the figure). When the gear shifting operation is performed, the wire rope is stretched. Under the action of the tension of the wire rope, the guide tube 2 swings to adapt to the different gears of the gearbox.

[0025] During the swinging process of the straight rod portion 21, the shell 1 needs to reserve sufficient clearance to prevent the shell 1 from restricting the movement of the straight rod portion 21. Therefore, in the embodiment of the present invention, an inclined groove 10 with an open end is formed between the shell 1 and the straight rod portion 21. The cross-section of the inclined groove 10 is a D-shaped structure, and the opening at one end away from the rotating portion 20 is arranged. The straight rod portion 21 can swing within the D-shaped area of ​​the inclined groove 10, and the swinging range is set within a range with the center of the sphere of the rotating portion 20 as the center and a central angle of 16 degrees.

[0026] During use, the shift cable is very susceptible to the external environment at the gearbox end, causing mud, water, sand and gravel to splash into the inclined groove 10, resulting in insufficient swing angle of the straight rod portion 21 and difficult shifting operation. To solve this problem, the embodiment of the present invention provides a seal 3 at the opening of the inclined groove 10. The seal 3 blocks the opening of the inclined groove 10 to prevent external mud, water, sand and gravel from splashing into the inclined groove 10, thereby providing a good swinging environment for the straight rod portion 21.

[0027] In the embodiment of the present invention, the sealing member 3 includes a bending portion 30, which has elasticity in the radial direction of the straight rod portion 21. While ensuring the sealing of the inclined groove 10, when the straight rod portion 21 swings, the bending portion 30 elastically deforms with the swing of the straight rod portion 21 to adapt to the reduction or increase of the opening area of ​​the inclined groove 10 caused by the swing of the straight rod portion 21.

[0028] In one embodiment, the bending portion 30 includes an inclined thin wall that is inclined from bottom to top in a direction away from the opening of the inclined groove 10. When the straight rod portion 21 swings upward, the inclined thin wall at the upper portion of the straight rod portion 21 swings counterclockwise, and the inclined thin wall at the lower portion of the straight rod portion 21 swings clockwise to adapt to the swing of the straight rod portion 21 while ensuring that the opening of the inclined groove 10 is blocked.

[0029] In another embodiment, the bending portion 30 includes a plurality of oblique thin walls, which are arranged to be inclined in opposite directions in sequence to form a corrugated structure, which is similar to a corrugated structure. Under the premise of ensuring that the opening of the inclined groove 10 is blocked, the corrugated structure can further enhance the elasticity and strength of the bending portion 30.

[0030] In a preferred embodiment, the seal 3 further includes a first connection portion 31 and a second connection portion 32 , the bending portion 30 is disposed between the first connection portion 31 and the second connection portion 32 , the first connection portion 31 is connected to the straight rod portion 21 , and the second connection portion 32 is connected to the housing 1 .

[0031] Specifically, the first connection portion 31 is fitted on the outer surface of the straight rod portion 21 , wherein the thickness of the first connection portion 31 at one end away from the rotating portion 20 gradually increases to increase the fitting force between the first connection portion 31 and the straight rod portion 21 .

[0032] The second connecting portion 32 is firmly connected to the outer wall of the shell 1, wherein the outer wall of the shell 1 is provided with a first mounting groove 11, and the second connecting portion 32 is provided with a first boss 320 which can be embedded in the first mounting groove 11, and the first boss 320 is embedded in the first mounting groove 11 in an interference fit connection manner to ensure the firm installation of the seal 3.

[0033] Preferably, a first guide portion 33 is provided between the first connection portion 31 and the bending portion 30, and the first guide portion 33 is preferably rounded. Providing the first guide portion 33 between the first connection portion 31 and the bending portion 30 effectively increases the elasticity of the bending portion 30, and significantly improves the fatigue strength of the connection between the bending portion 30 and the first connection portion 31; a second guide portion 34 is provided between the second connection portion 32 and the bending portion 30, and the second guide portion 34 is preferably rounded. Providing the second guide portion 34 between the second connection portion 32 and the bending portion 30 effectively increases the elasticity of the bending portion 30, and significantly improves the fatigue strength of the connection between the bending portion 30 and the second connection portion 32.

[0034] In a preferred embodiment of the present invention, the seal 3 is entirely made of elastic material; further, the seal 3 is integrally formed to ensure the balance of the force on the seal 3 as a whole.

[0035] Through the above scheme, the sealing problem in the area between the shell and the guide tube that allows the guide tube to swing is solved. In addition, at the gearbox end of the shift cable, it is often easy for mud and water to splash into the guide tube due to poor sealing at the joint between the guide tube and the head-changing rod. This situation generally leads to the following two situations: 1. Under normal temperature conditions, long-term accumulation of water causes the wire rope to rust, making it difficult to push and pull the shift cable, reducing efficiency, increasing shift resistance, and even making it impossible to shift gears; 2. In low temperature environments, especially in the north where temperatures are below zero, water accumulates inside the shift cable and freezes, making it impossible to push and pull the shift cable and the entire vehicle unable to shift gears.

[0036] To further solve this problem, in the embodiment of the present invention, a sealing cap 4 is provided at one end of the straight rod portion 21 away from the rotating portion 20 .

[0037] In one embodiment, the sealing cap 4 includes an annular interface portion 40 and a third connecting portion 41, wherein the annular interface portion 40 is arranged on the end surface of the straight rod portion 21, and a sealing ring 42 protruding toward the center of the circle is arranged on the inner wall of the annular interface portion 40, and the sealing ring 42 is preferably made of elastic material, such as silicone, rubber, sponge, etc. When the guide tube 3 is connected with the joint rod (not shown), the joint rod needs to pass through the inner ring of the annular interface portion 40 first, and at the position where the joint rod passes through the sealing ring 42, the inner diameter of the sealing ring 42 is smaller than the outer diameter of the joint rod, and the sealing ring 42 needs to be compressed to deform the sealing ring 42, so that the joint rod passes through the annular interface portion 40 and connects with the guide tube 2, and the sealing ring 42 is kept in a compressed state for a long time, and a tight seal is formed between the annular interface portion 40 and the joint rod to prevent muddy water from splashing into the guide tube 2. Preferably, along the axial direction of the annular interface portion 40, the sealing ring 42 is sequentially arranged at multiple locations.

[0038] In addition, a second mounting groove 22 is provided on the outer wall of the guide tube 2, and a second boss 410 is provided on the second connecting portion 41, which can be embedded in the second mounting groove 22. The second boss 410 is embedded in the second mounting groove 22 by an interference fit connection method to ensure that the sealing cap 4 is firmly installed on the guide tube 2. The sealing cap 4 is installed on the guide tube 2 in an interference fit manner, further ensuring the sealing performance between the sealing cap 4 and the guide tube 2.

[0039] Preferably, the sealing cap 4 is integrally formed.

[0040] Based on the above technical solution, an embodiment of the present invention further provides a shift cable, which includes the sealing device of the shift cable as described above.

[0041] Based on the above technical solution, an embodiment of the present invention further provides an automobile, which includes the sealing device of the shift cable as described above.

[0042] The above is a specific description of the preferred implementation of the present invention, but the invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A sealing device for a shift cable, characterized in that: The guide tube comprises a housing and a guide tube, wherein the guide tube comprises a rotating portion and a straight rod portion, wherein the rotating portion is rotatably arranged in the housing, an inclined groove with an open end is formed between the straight rod portion and the housing, a sealing member is provided at the opening of the inclined groove, and the sealing member comprises a bent portion, and the bent portion is elastic along the radial direction of the straight rod portion; The sealing member further comprises a first connecting portion and a second connecting portion, wherein the first connecting portion is fitted on the straight rod portion, the second connecting portion is tightly connected to the outer wall of the shell, and the bent portion is arranged between the first connecting portion and the second connecting portion; In a direction away from the rotating portion, the thickness of the first connecting portion at an end away from the bending portion gradually increases; The end of the straight rod part away from the rotating part is provided with a sealing cap, the sealing cap includes an annular interface part and a third connecting part, the annular interface part is fitted on the end surface of the straight rod part, the inner wall of the annular interface part is provided with a sealing ring protruding toward the center of the circle, the outer wall of the straight rod part is provided with a second mounting groove, the third connecting part is provided with a second boss, the second boss is embedded in the second mounting groove, and the second boss and the second mounting groove are interference fit; Wherein, the bending portion includes a plurality of oblique thin walls, and the plurality of oblique thin walls are arranged to be inclined in opposite directions in sequence to form a corrugated structure.

2. The sealing device for a shift cable according to claim 1, characterized in that: A first guiding portion is provided between the first connecting portion and the bending portion.

3. The sealing device for a shift cable according to claim 1, characterized in that: A second guiding portion is provided between the second connecting portion and the bending portion.

4. The sealing device for a shift cable according to claim 1, characterized in that: A first mounting groove is provided on the outer wall of the shell, a first boss is provided on the second connecting portion, the first boss is embedded in the first mounting groove, and the first boss and the first mounting groove are interference fit.

5. A shift cable, characterized in that: A sealing device for a shift cable comprising the sealing device as claimed in any one of claims 1 to 4.

6. A car, characterized in that: A sealing device for a shift cable comprising the sealing device as claimed in any one of claims 1 to 4.

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