A transmission shaft sliding fork plug

Abstract

This utility model provides a driveshaft sliding fork plug, belonging to the technical field of automotive transmission systems. It includes an end cap, a sealing sleeve integrally formed at the bottom of the end cap, a first annular groove, a second annular groove, and a third annular groove sequentially formed on the side wall of the sealing sleeve, an annular sealing ring embedded in the first annular groove, an annular sealing lip embedded in the second annular groove, and a plug sealing ring embedded in the third annular groove. This utility model, through a three-layer sealing structure of the annular sealing ring, annular sealing lip, and plug sealing ring, forms a gradient protection, effectively blocking high-pressure oil leakage. The grease reservoir at the bottom of the sealing sleeve fits against the top of the inner spline of the sliding fork, and its surface spiral groove actively guides grease to evenly cover the spline mating surface, avoiding grease waste and preventing spline wear due to lack of oil.

Description

Technical Field

[0001] This utility model belongs to the technical field of automotive transmission systems, specifically relating to a drive shaft sliding fork plug. Background Technology

[0002] In automotive power transmission systems, the driveshaft, as a key component connecting the gearbox and drive axle, plays a crucial role in efficiently transmitting engine power to the wheels. The sliding fork, as an important part of the driveshaft, functions primarily to compensate for the driveshaft's length through spline connections, adapting to changes in the suspension system's posture during vehicle movement and ensuring the continuity and stability of power transmission.

[0003] Most traditional plugs use only a single sealing ring for sealing, which can only achieve basic dust and water protection and cannot cope with the dynamic working conditions of the transmission system. When the drive shaft vibrates, the sealing ring is prone to gaps with the inner wall of the sliding fork, resulting in grease leakage. In addition, traditional plugs have not optimized the structure for the lubrication requirements of the spline inside the sliding fork, which can easily lead to uneven distribution of grease. Therefore, a new type of drive shaft sliding fork plug has been developed. Utility Model Content

[0004] The purpose of this invention is to provide a drive shaft sliding fork plug, which aims to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A drive shaft sliding fork plug, comprising,

[0007] The end cap, a sealing sleeve integrally formed at the bottom of the end cap, a first annular groove, a second annular groove, a third annular groove sequentially formed on the side wall of the sealing sleeve, an annular sealing ring embedded in the first annular groove, an annular sealing lip embedded in the second annular groove, and a plug sealing ring embedded in the third annular groove.

[0008] As a preferred embodiment of this utility model, the top of the end cap is integrally formed with a protruding edge, the diameter of which is larger than the inner diameter of the sliding fork and abuts against the end face of the sliding fork.

[0009] As a preferred embodiment of this utility model, the top of the end cap is provided with a groove, and a twisting strip is integrally formed in the groove of the end cap.

[0010] As a preferred embodiment of this utility model, the bottom of the end cap is integrally formed with a reinforcing rib, and the end of the reinforcing rib is fixedly connected to the inner wall of the sealing sleeve.

[0011] As a preferred embodiment of this utility model, the bottom of the sealing sleeve is integrally formed with a grease reservoir ring, and the bottom of the grease reservoir ring abuts against the top of the inner spline of the sliding fork.

[0012] As a preferred embodiment of this utility model, the surface of the grease storage ring is provided with a spiral groove, and the spiral groove on the surface of the grease storage ring is the same as the internal spline tooth clearance of the sliding fork.

[0013] As a preferred embodiment of this utility model, the side wall of the end cap has three U-shaped notches evenly distributed along the circumference, and three sets of elastic buckles are integrally formed in the three U-shaped notches of the end cap.

[0014] Compared with the prior art, the beneficial effects of this utility model are: through the three-layer sealing structure of the annular sealing ring, the annular sealing lip and the plug sealing ring, a gradient protection is formed, which effectively blocks the leakage of high pressure oil. The grease reservoir at the bottom of the sealing sleeve fits against the top of the inner spline of the sliding fork, and its surface spiral groove can actively guide the grease to evenly cover the spline mating surface, which not only avoids grease waste, but also prevents the spline from wearing due to lack of oil. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0016] Figure 1 This is a schematic diagram of the overall installation position of this utility model;

[0017] Figure 2 A schematic diagram showing the location of the groove in this utility model;

[0018] Figure 3 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 4 This is a top view schematic diagram of the overall structure of this utility model.

[0020] In the diagram: 101, end cap; 102, sealing sleeve; 103, first annular groove; 104, second annular groove; 105, third annular groove; 106, shaped sealing ring; 107, annular sealing lip; 108, plug sealing ring; 109, raised edge; 110, rotating strip; 111, reinforcing rib; 112, grease reservoir ring; 113, elastic buckle. Detailed Implementation

[0021] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0023] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0024] Example

[0025] Reference Figures 1-4 This is an embodiment of the present invention, which provides a drive shaft sliding fork plug, comprising:

[0026] End cap 101, sealing sleeve 102 integrally formed at the bottom of end cap 101, first annular groove 103, second annular groove 104, third annular groove 105 sequentially formed on the side wall of sealing sleeve 102, annular sealing ring 106 embedded in the first annular groove 103, annular sealing lip 107 embedded in the second annular groove 104, and plug sealing ring 108 embedded in the third annular groove 105.

[0027] The end cap is made of high-strength engineering plastic. The diameter of the end cap 101 is the same as the inner diameter of the sliding fork. The annular sealing ring 106 is made of nitrile rubber, and the annular sealing lip 107 is made of fluororubber with a V-shaped cross section and the opening facing the outside of the sealing sleeve. The plug ring is made of polytetrafluoroethylene composite material and has a built-in stainless steel spring. The outer diameter of the annular sealing ring 106, the annular sealing lip 107 and the plug ring 108 is the same as the inner diameter of the sliding fork, which can achieve triple sealing.

[0028] Specifically, the top of the end cap 101 is integrally formed with a protruding edge 109, the diameter of which is larger than the inner diameter of the sliding fork and abuts against the end face of the sliding fork.

[0029] The protruding edge 109 is a ring structure coaxial with the end cap 101 and made of the same material as the end cap. When the plug is assembled onto the sliding fork, the lower surface of the protruding edge 109 is completely fitted and abutted against the end face of the sliding fork. On the one hand, it plays an axial positioning role for the plug, and on the other hand, through the close contact between the protruding edge and the end face of the sliding fork, it further prevents external impurities from entering the interior of the sliding fork from the end gap.

[0030] Furthermore, a groove is provided on the top of the end cap 101, and a rotating strip 110 is integrally formed in the groove of the end cap 101.

[0031] Among them, the screwing bar 110 is a rectangular bar structure, and the material is the same as the end cap. When it is necessary to install or remove the end cap, a wrench or special tool can be used to wedge between the screwing bars 110. The end cap can be rotated by rotating the tool, which avoids slippage when manually screwing and improves assembly and maintenance efficiency.

[0032] Preferably, the bottom of the sealing sleeve 102 is integrally formed with a grease reservoir ring 112, the bottom of the grease reservoir ring 112 abuts against the top of the inner spline of the sliding fork; a spiral groove is formed on the surface of the grease reservoir ring 112, and the spiral groove on the surface of the grease reservoir ring 112 has the same tooth clearance as the inner spline of the sliding fork.

[0033] The grease reservoir 112 is made of the same material as the sealing sleeve 102, and its outer diameter is the same as that of the sealing sleeve 102. When the plug is fully assembled, the bottom of the grease reservoir 112 abuts tightly against the top of the inner spline of the sliding fork. The grease reservoir 112 can store grease to provide continuous lubrication for the mating parts of the inner spline of the sliding fork and the drive shaft, reducing wear. The spiral groove parameters on the surface of the grease reservoir 112 match the tooth clearance of the inner spline. When the drive shaft is running, the grease reservoir 112 rotates slightly with the sealing sleeve 102. The spiral groove can guide the grease stored inside to the tooth clearance of the inner spline of the sliding fork, ensuring that the grease is evenly distributed on the mating surface and improving the lubrication effect.

[0034] It should be noted that the end cap 101 has three U-shaped notches evenly distributed along the circumference on its side wall, and three sets of elastic buckles 113 are integrally formed in the three U-shaped notches of the end cap 101.

[0035] The drive shaft sliding fork has an annular groove that matches the elastic buckle 113 at the corresponding position. When the plug is assembled, the elastic buckle 113 is squeezed and deformed into the sliding fork. After reaching the groove position, it returns to its original shape and is locked into the groove, realizing the quick fixation of the plug and the sliding fork, while facilitating disassembly and maintenance.

[0036] When using, hold the protruding edge 109 on the top of the end cap 101 and align the sealing sleeve 102 with the end opening of the drive shaft sliding fork, ensuring that the sealing sleeve 102 is coaxial with the sliding fork. Slowly insert the sealing sleeve 102 into the sliding fork, maintaining a constant speed during insertion to avoid excessive force that could deform the annular sealing lip 107 and the plug sealing ring 108. When the lower surface of the protruding edge 109 initially contacts the end face of the sliding fork, stop inserting. At this point, the bottom of the grease reservoir ring 112 should be aligned with the top of the inner spline of the sliding fork. Secure the special wrench in place. Between the screwing strip 110 in the groove at the top of the cover 101, slowly turn the wrench clockwise to drive the cover to rotate forward. During the rotation, observe the fit between the protruding edge 109 and the end face of the sliding fork until the protruding edge 109 is completely fitted to the end face of the sliding fork. Gently tap the circumference of the protruding edge 109 at the top of the end cover 101 with a rubber hammer to deform the elastic buckle 113 and allow it to fully enter the annular groove of the sliding fork. A clicking sound indicates that the buckle is locked. Gently turn the cover in the opposite direction with the wrench. If the cover does not rotate significantly, it means that the buckle is fixed in place.

[0037] In summary, a gradient protection is formed through the three-layer sealing structure of the annular sealing ring 106, the annular sealing lip 107, and the plug sealing ring 108. The nitrile rubber annular sealing ring 106 provides basic dust and water protection, the fluororubber annular sealing lip 107 enhances dynamic sealing, and the polytetrafluoroethylene plug sealing ring 108 can withstand greater pressure and effectively block high-pressure oil leakage. The grease reservoir ring 112 at the bottom of the sealing sleeve 102 fits against the top of the inner spline of the sliding fork, and its surface spiral groove can actively guide the grease to evenly cover the spline mating surface, which not only avoids grease waste but also prevents the spline from wearing due to lack of oil. At the same time, the grease reservoir ring can also prevent external dust and iron filings from entering the spline meshing area, reducing the risk of transmission component failure. The elastic buckle 113 on the side wall can be fixed by simple operation of insertion and tapping. The end cap 101 is made of engineering plastic and, together with the reinforcing ribs 111 evenly distributed around the circumference at the bottom, improves the connection strength between the end cap and the sealing sleeve 102.

[0038] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0039] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0040] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0041] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A drive shaft sliding fork plug, characterized in that: include, End cap (101), sealing sleeve (102) integrally formed at the bottom of end cap (101), first annular groove (103), second annular groove (104), third annular groove (105) sequentially formed on the side wall of sealing sleeve (102), annular sealing ring (106) embedded in the first annular groove (103), annular sealing lip (107) embedded in the second annular groove (104), and plug sealing ring (108) embedded in the third annular groove (105).

2. The drive shaft sliding fork plug according to claim 1, characterized in that: The top of the end cap (101) is integrally formed with a protruding edge (109), the diameter of which is larger than the inner diameter of the sliding fork and abuts against the end face of the sliding fork.

3. A drive shaft sliding fork plug according to claim 2, characterized in that: The top of the end cap (101) is provided with a groove, and a twisting strip (110) is integrally formed in the groove of the end cap (101).

4. A drive shaft sliding fork plug according to claim 3, characterized in that: The bottom of the end cap (101) is integrally formed with a reinforcing rib (111), and the end of the reinforcing rib (111) is fixedly connected to the inner wall of the sealing sleeve (102).

5. A drive shaft sliding fork plug according to claim 4, characterized in that: The bottom of the sealing sleeve (102) is integrally formed with a grease reservoir ring (112), and the bottom of the grease reservoir ring (112) abuts against the top of the inner spline of the sliding fork.

6. A drive shaft sliding fork plug according to claim 5, characterized in that: The surface of the grease storage ring (112) is provided with a spiral groove, and the spiral groove on the surface of the grease storage ring (112) is the same as the inner spline tooth clearance of the sliding fork.

7. A drive shaft sliding fork plug according to claim 6, characterized in that: The end cap (101) has three U-shaped notches evenly distributed in the circumferential direction on its side wall, and three sets of elastic buckles (113) are integrally formed in the three U-shaped notches of the end cap (101).

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