Automobile oil pump shaft

Abstract

The utility model relates to the technical field of automobile parts, in particular to an automobile oil pump shaft which comprises a shaft body and a gear assembly, and the shaft body comprises a shaft rod, a first end head, a second end head, a first connecting groove and a second connecting groove. The gear assembly is designed to be of a structure capable of being separated from the shaft body. When the gear cannot work normally due to abrasion or local damage, the whole shaft body does not need to be replaced, only the gear assembly needs to be replaced, and the maintenance cost is greatly reduced; the gear assembly is stably assembled with the shaft body through various structures, the guide blocks and the guide grooves are T-shaped, and the contact area and friction force between the guide blocks and the guide grooves are increased through the T-shaped structures, so that the gear body can be accurately in place along the guide grooves in the installation process, and the installation efficiency is improved. And the gear is prevented from circumferentially or axially deviating on the shaft body.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile parts, in particular to an automobile oil pump shaft. BACKGROUND

[0002] The automobile oil pump shaft is a key component of the oil pump in the automobile lubricating system, and plays a vital role in the normal operation and service life of the engine.

[0003] The end of the automobile oil pump shaft is driven to rotate by gear transmission, the gear is easy to wear, and the traditional gear and shaft body are integrally formed, so that the local damage cannot be used as a whole, and the use is inconvenient. UTILITY MODEL CONTENT

[0004] (I) technical problem solved

[0005] In view of the deficiencies of the prior art, the utility model provides an automobile oil pump shaft.

[0006] (II) technical scheme

[0007] In order to achieve the above purpose, the utility model provides the following technical scheme: an automobile oil pump shaft, comprising a shaft body and a gear assembly, the shaft body comprises a shaft rod, a first end head, a second end head, a first connecting groove and a second connecting groove, the two ends of the shaft rod are connected with the first end head and the second end head respectively, the first end head is provided with the first connecting groove away from one end of the shaft rod, the second end head is also provided with the second connecting groove away from one end of the shaft rod, the shaft rod, the first end head, the second end head, the first connecting groove and the second connecting groove are concentrically arranged, the outer diameter of the first end head and the second end head is greater than the shaft rod, and the second end head is also provided with the gear assembly.

[0008] In order to facilitate the stable assembly of the gear and the shaft body, the utility model improves that the gear assembly comprises a gear body, a guide block, a flange, a stud and a positioning sleeve, the second end head is provided with the flange close to one end of the shaft rod, the gear body is also sleeved on the second end head, the second end head is provided with a guide groove, the inner side of the gear body is provided with a guide block connected with the guide groove, the second end head is provided with the stud away from one end of the shaft rod, the center of the stud is provided with a through hole penetrating through the second connecting groove, and the positioning sleeve is threadedly connected with the stud.

[0009] Preferably, the guide block and the guide groove are provided with a plurality of groups.

[0010] Preferably, the guide block and the guide groove are T-shaped.

[0011] In order to stabilize the positioning gear body with guide block, the utility model improves, the stud outer diameter is less than the second end head outer diameter, the positioning sleeve still is provided with the protection groove for covering the second end head.

[0012] Preferably, the guide block outside close to the gear body one end is provided with friction block still, the friction block has elasticity.

[0013] (Three) beneficial effects

[0014] Compared with the prior art, the utility model provides a kind of automobile oil pump shaft, with following beneficial effects:

[0015] The automobile oil pump shaft changes the mode of traditional gear and shaft body integrated forming, and designs the gear assembly as a structure separable from the shaft body.When the gear cannot work normally due to wear or local damage, the entire shaft body does not need to be replaced, only the gear assembly needs to be replaced, which greatly reduces the maintenance cost.

[0016] The gear assembly is stably assembled with the shaft body by various structures, the guide block and the guide groove are arranged in several groups and are all T-shaped, the T-shaped structure increases the contact area and friction force between the guide block and the guide groove, so that the gear body can be accurately positioned along the guide groove during installation, and the gear is prevented from being offset circumferentially or axially on the shaft body.

[0017] The threaded connection mode of the stud and the positioning sleeve not only realizes the fastening of the gear body, but also plays a further positioning role.The through hole penetrating the second connecting groove and arranged at the center of the stud facilitates the installation tool to pass through, and facilitates the tightening of the positioning sleeve.The protection groove arranged on the positioning sleeve covers the second end head, plays a protection role on the second end head during fastening, prevents the second end head from being damaged during installation or use, and enhances the stability of the entire connecting structure. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the first main view schematic drawing of the utility model structure;

[0019] Figure 2 It is the second main view schematic drawing of the utility model structure;

[0020] Figure 3 It is the schematic drawing of explosion of the utility model structure;

[0021] Figure 4 It is the structure of the utility model Figure 3 Partial enlarged schematic drawing.

[0022] In the drawing: 1, shaft rod;2, first end head;3, second end head;4, gear body;5, guide block;6, flange;7, stud;8, positioning sleeve;9, friction block. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0024] Please refer to Figures 1-4 The utility model provides an automobile oil pump shaft, including shaft body and gear assembly, the shaft body includes shaft stem 1, first end 2, second end 3, first connecting groove and second connecting groove, the both ends of the shaft stem 1 are connected with the first end 2 and second end 3 respectively, the first end 2 is provided with the first connecting groove away from the one end of the shaft stem 1, the second end 3 is also provided with the second connecting groove away from the one end of the shaft stem 1, the shaft stem 1, first end 2, second end 3, first connecting groove and second connecting groove concentric circle arrangement, the outer diameter of the first end 2 and second end 3 is greater than the shaft stem 1, the second end 3 is also provided with the gear assembly.

[0025] The novel automobile oil pump shaft is composed of shaft body and gear assembly. The second end 3 of the shaft body provides the basis for the installation of the gear assembly. The shaft stem 1, first end 2, second end 3, first connecting groove and second connecting groove are concentrically arranged, which ensures the coaxiality and stability of the shaft body during rotation, and provides a prerequisite for the stable operation of the gear assembly.

[0026] In the embodiment, the gear assembly includes gear body 4, guide block 5, flange 6, stud 7 and positioning sleeve 8, the second end 3 is provided with the flange 6 near the one end of the shaft stem 1, the gear body 4 is also sleeved on the second end 3, the second end 3 is provided with a guide groove, the inner side of the gear body 4 is provided with the guide block 5 connected with the guide groove, the second end 3 is provided with the stud 7 away from the one end of the shaft stem 1, the center of the stud 7 is provided with a through hole penetrating through the second connecting groove, the positioning sleeve 8 is threadedly connected with the stud 7, and the guide block 5 in the gear assembly cooperates with the guide groove on the second end 3. Since the guide block 5 and the guide groove are both T-shaped and provided with several groups, the guide block 5 can smoothly slide along the guide groove when the gear body 4 is installed. The T-shaped structure increases the contact area between the two, so that the guide accuracy is higher, and the friction force is also increased accordingly. This not only can guide the gear body 4 to be accurately installed on the shaft body, but also can effectively prevent the gear body 4 from being deviated in the circumferential direction or the axial direction on the shaft body during the rotation of the shaft body, so as to ensure the accuracy and stability of the gear transmission.

[0027] The flange 6 provided on the second end head 3 near one end of the shaft 1 provides clear axial positioning for the gear body 4. When the gear body 4 is sleeved on the second end head 3, the flange 6 limits the axial movement range of the gear body 4, so that the position of the gear body 4 in the axial direction is fixed, further enhancing the stability of the connection between the gear and the shaft. The stud 7 provided on the second end head 3 away from one end of the shaft 1 has a through hole in the center which is in communication with the second connecting groove. The positioning sleeve 8 is threadedly connected with the stud 7, and by rotating the positioning sleeve 8, it is gradually moved closer to the gear body 4 along the threads of the stud 7. In this process, the positioning sleeve 8 exerts an axial pressure on the gear body 4, thereby tightly fixing the gear body 4 on the shaft. The protective groove provided on the positioning sleeve 8 is sized to fit the second end head 3 and can wrap around the second end head 3. In this way, while the positioning sleeve 8 is fastening the gear body 4, the protective groove can prevent the second end head 3 from being damaged by external forces during installation or use. At the same time, the close fit between the protective groove and the second end head 3 further enhances the stability of the entire connection structure, ensuring that the connection between the gear and the shaft is always reliable in the complex working environment of the automobile engine. The elastic friction block 9 provided on the outside of the guide block 5 near one end of the gear body 4 is in close contact with the surface of the shaft after the gear body 4 is installed on the shaft. Since the friction block 9 is elastic, even if a small relative movement occurs between the gear body 4 and the shaft during the rotation of the shaft due to external forces such as engine vibration, the friction block 9 can always maintain close contact with the surface of the shaft through its elastic deformation, thereby increasing the friction between the two. This continuous friction further prevents the gear body 4 from loosening on the shaft, ensuring the stability and reliability of the gear transmission and ensuring that the oil pump shaft can normally drive other shafts to rotate, maintaining the stable operation of the automobile lubrication system.

[0028] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily referring to the same embodiment, nor are separate embodiments necessarily mutually exclusive of one another. In principle, any feature of the embodiments described herein can be combined with each other, unless technically contradictory or incompatible, to form a corresponding implementable technical solution.

[0029] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the use of related terms in the specification is merely to describe specific embodiments and is not intended to limit the application.

[0030] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application.

Claims

1. An automotive oil pump shaft comprising a shaft body and a gear assembly, characterized by: The shaft body comprises a shaft rod (1), a first end head (2), a second end head (3), a first connecting groove and a second connecting groove, the shaft rod (1) is connected with the first end head (2) and the second end head (3) at two ends respectively, the first end head (2) is provided with the first connecting groove at one end away from the shaft rod (1), the second end head (3) is further provided with the second connecting groove at one end away from the shaft rod (1), the shaft rod (1), the first end head (2), the second end head (3), the first connecting groove and the second connecting groove are arranged in concentric circles, the outer diameter of the first end head (2) and the second end head (3) is greater than that of the shaft rod (1), the second end head (3) is further provided with the gear assembly.

2. The automotive oil pump shaft of claim 1, wherein: The gear assembly comprises a gear body (4), a guide block (5), a flange (6), a stud (7) and a positioning sleeve (8), the second end head (3) is provided with the flange (6) at one end close to the shaft rod (1), the second end head (3) is further provided with the gear body (4), the second end head (3) is provided with a guide groove, the inner side of the gear body (4) is provided with the guide block (5) connected with the guide groove, the second end head (3) is provided with the stud (7) at one end away from the shaft rod (1), the center of the stud (7) is provided with a through hole penetrating through the second connecting groove, and the positioning sleeve (8) is threadedly connected with the stud (7).

3. The automotive oil pump shaft of claim 2, wherein: The guide block (5) and the guide groove are provided with several groups.

4. The automotive oil pump shaft of claim 3, wherein: The guide block (5) and the guide groove are both T-shaped.

5. The automotive oil pump shaft of claim 4, wherein: The outer diameter of the stud (7) is smaller than that of the second end head (3), and the positioning sleeve (8) is further provided with a protection groove for covering the second end head (3).

6. An automotive oil pump shaft as set forth in claim 5 characterized in that: The outer side of the guide block (5) is further provided with a friction block (9) at one end close to the gear body (4), and the friction block (9) has elasticity.

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