Universal joint cross shaft structure

Abstract

The utility model discloses a universal joint cross shaft structure which comprises bearing sleeves, roller pins and a dustproof seat ring, and each shaft head of a universal joint cross shaft is provided with the bearing sleeve; a plurality of roller pins are arranged on the inner side of the bearing sleeve in an auxiliary mode through matching of the dustproof seat ring. The top of the bearing sleeve is further provided with an internal thread fixing hole position for fixed installation of threaded connection of a plug screw matched with a gasket. The end face bearings are arranged between the bearing sleeves and the shaft heads of the universal joint cross shaft to change original sliding friction into rolling friction, so that the problem of failure of the universal joint cross shaft assembly caused by failure of an end face oil film when axial force is generated in the prior art is solved, the service life is prolonged, and in addition, in order to guarantee consistent oil pressure and smooth circulation, the service life of the universal joint cross shaft assembly is prolonged. A plurality of oil holes are formed in the dustproof seat ring and can be matched with a screw plug provided with a through hole to enable lubricating grease in the external environment to flow in the universal joint cross shaft, and therefore it is guaranteed that internal oil pressure and external oil pressure of the universal joint cross shaft are consistent while overall lubrication is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of universal joint transmission structures, and particularly relates to a universal joint cross shaft structure. Background Art

[0002] A universal joint is a mechanical part that realizes power transmission at a variable angle and is used in positions where the direction of the transmission axis needs to be changed. It is the "joint" part of the universal transmission device in the vehicle drive system. The combination of a universal joint and a transmission shaft is called a universal joint transmission device. In a vehicle with a front-mounted engine and rear-wheel drive, the universal joint transmission device is installed between the output shaft of the transmission and the input shaft of the main reducer of the drive axle. A cross shaft type rigid universal joint drives the other fork to rotate through one of the rotating forks via a cross shaft, and at the same time, it can swing in any direction around the center of the cross shaft. The shaft connected to the input power is called the input shaft, and the shaft output through the universal joint is called the output shaft.

[0003] The existing working conditions of the universal joint cross shaft under oil immersion are not ideal, mainly reflected in the problem that the lubricating oil cannot flow smoothly inside, resulting in the problem of inconsistent oil pressure. In addition, the existing structure of the universal joint cross shaft has large friction during operation, resulting in reduced service life and affected operation.

[0004] Therefore, it is necessary to design a universal joint cross shaft structure to ensure lubrication and consistent oil pressure through its own structure design, avoid the risk of failure, and improve the service life. Summary of the Utility Model

[0005] Aiming at the problems existing in the prior art, the purpose of the utility model is to provide a universal joint cross shaft structure.

[0006] To solve the above problems, the utility model adopts the following technical solutions:

[0007] A universal joint cross shaft structure includes a plug, a bearing sleeve, needle rollers, a dust-proof seat ring, and a universal joint cross shaft. Each shaft head of the universal joint cross shaft is provided with the bearing sleeve; several needle rollers are assembled inside the bearing sleeve through the cooperation of the dust-proof seat ring; an internal thread fixing hole position is also opened at the top of the bearing sleeve for a plug with a washer to be thread-connected.

[0008] Preferably, a gasket is arranged between each needle roller and the dust-proof seat ring.

[0009] Preferably, several oil holes are equidistantly opened on the dust-proof seat ring.

[0010] Preferably, a thrust bearing is arranged between each bearing sleeve and the shaft head of the universal joint cross shaft.

[0011] Preferably, a boss and a buckle are integrally formed on the dust-proof seat ring at equal intervals.

[0012] Preferably, a groove is formed at the bottom of the inner side of the bearing sleeve to cooperate with the fastening member for fixedly installing the dust-proof seat ring.

[0013] Compared with the prior art, the advantages of the present utility model are as follows:

[0014] By arranging end face bearings between the bearing sleeve and the shaft head of the universal joint cross shaft, the present utility model changes the original sliding friction into rolling friction, so as to solve the problem that the end face oil film fails when axial force is generated previously, resulting in the failure of the universal joint cross shaft assembly, and can improve the service life of the cross shaft universal joint. In addition, to ensure consistent oil pressure and smooth flow, a plurality of oil holes are provided on the dust-proof seat ring, which can cooperate with the plug also provided with a through hole to allow the lubricating grease in the external environment to flow through these holes inside the universal joint cross shaft, so as to realize the overall lubrication of the universal joint cross shaft and ensure consistent oil pressure of the lubricating oil inside and outside the universal joint cross shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the overall assembly sectional structure schematic diagram of the present utility model;

[0016] Figure 2 is Figure 1 the partial enlarged structure schematic diagram at A in

[0017] Figure 3 is the structure schematic diagram of the dust-proof ring seat of the present utility model;

[0018] Figure 4 is Figure 2 the partial enlarged structure schematic diagram at B in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0020] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper / lower end", "inner", "outer", "front end", "back end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0021] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "set / sleeved with", "socketed", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0022] Please refer to Figures 1 to 4 , the present utility model provides a technical solution: a universal joint cross shaft structure, including a bearing sleeve 4, needle rollers 5, and a dust-proof seat ring 7. It is characterized in that each shaft head of the universal joint cross shaft 8 is provided with the bearing sleeve 4; several needle rollers 5 are auxiliary installed inside the bearing sleeve 4 through the cooperation of the dust-proof seat ring 7; an internal thread fixing hole position is also opened at the top of the bearing sleeve 4 for the fixed installation of a plug 1 with a washer 2 through threaded connection. It can be further explained that a groove 40 is formed at the bottom of the inner side surface of the bearing sleeve 4 to be buckled and fixedly installed with the dust-proof seat ring 7 formed with a buckle 71. Such a design can prevent the axial displacement of the dust-proof seat ring 77.

[0023] The internal thread fixing hole position on the bearing sleeve 4 can not only be used for the connection and installation of the plug 1, but also serve as the connection function of the connection force-applying part when the bearing sleeve is disassembled and pulled out.

[0024] A washer 2 is arranged between the bearing sleeve 4 and the plug 1 to prevent the plug 1 from loosening during use, so as to improve the stability, safety, and practicability of the present utility model.

[0025] A gasket 6 is arranged between each of the needle rollers 5 and the dust-proof seat ring 7. Its function is to limit the axial movement of the needle rollers 5 and prevent the needle rollers 5 from falling into the grooves of the dust-proof seat ring 7. Similarly, the boss 70 formed on the dust-proof seat ring 7 can avoid the needle rollers 5 from rolling and colliding or displacing with each other in the axial direction. End face bearings 3 are arranged between the bearing sleeves 4 and the shaft heads of the universal joint cross shafts 8, changing the original sliding friction into rolling friction to solve the problem that the end face oil film fails when axial force is generated previously, resulting in the failure of the universal joint cross shaft assembly, and improving the service life of the cross shaft universal joint 8.

[0026] In addition, to ensure consistent oil pressure and smooth flow, a number of oil holes 72 are provided on the dust-proof seat ring 7. They can cooperate with the plug 1 also provided with a through hole to allow the lubricating grease in the external environment to flow through these holes inside the universal joint cross shaft 8, so as to achieve the overall lubrication of the universal joint cross shaft 8, ensure the consistency of the internal and external lubricating oil pressures of the universal joint cross shaft 8, and improve the working efficiency, stability, safety and service life.

[0027] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation. The element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0028] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A universal joint cross shaft structure, comprising a universal joint cross shaft (8), a plug (1), a bearing sleeve (4), needle rollers (5) and a dust-proof seat ring (7), characterized in that, Each shaft head of the universal joint cross shaft (8) is provided with the bearing sleeve (4); several needle rollers (5) are auxiliary installed inside the bearing sleeve (4) through the cooperation of the dust-proof seat ring (7); an internal thread fixing hole position is also opened at the top of the bearing sleeve (4) for the plug (1) equipped with a washer (2) to perform threaded connection.

2. The universal joint cross shaft structure according to claim 1, characterized in that A gasket (6) is arranged between each needle roller (5) and the dust-proof seat ring (7).

3. A cross shaft structure of a universal joint according to claim 2, characterized in that, A number of oil holes (72) are equidistantly opened on the dust-proof seat ring (7).

4. A cross shaft structure of a universal joint according to claim 1, characterized in that, A face bearing (3) is arranged between each bearing sleeve (4) and the shaft head of the universal joint cross shaft (8).

5. A universal joint cross shaft structure according to claim 1, characterized in that, The dust-proof seat ring (7) is integrally formed with a boss (70) and a buckle (71) equidistantly.

6. The universal joint cross shaft structure according to claim 1, characterized in that, A groove (40) is formed at the bottom of the inner side surface of the bearing sleeve (4) to cooperate with the buckle (71) to fixedly install the dust-proof seat ring (7).

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