An oil pump for lubricating the engine of a motorcycle

Abstract

The utility model relates to motorcycle lubrication engine technical field, concretely relates to a kind of oil pump for motorcycle lubrication engine;The thickness of the oil pump shell inner shaft hole of the design of the present design is 3mm~20mm, the stability of shaft in the process of rotation is enhanced, and the oil leakage caused by the up-and-down movement of shaft is reduced;Reasonable assembly of oil pump shaft, inner rotor, outer rotor, and the oil pump cover plate are stably set on the oil pump shell by multiple self-tapping screws, and form good sealed cavity with inner and outer rotor, further prevent oil leakage;At the same time, the setting of rotor pin ensures the synchronous rotation of inner rotor and oil pump shaft, and the insertion of positioning pin and positioning hole on the oil pump shell ensures the accurate positioning between components, and improves the working efficiency and reliability of oil pump.

Description

Technical Field

[0001] This utility model relates to the field of motorcycle engine lubrication technology, and in particular to an oil pump for motorcycle engine lubrication. Background Technology

[0002] Currently, most existing oil pumps adopt a rotor design. This type of oil pump forms a sealed cavity through the speed difference between the inner and outer rotors, which can stably draw oil from the inlet and transfer it to the outlet, thereby achieving effective lubrication of the motorcycle engine system. This design plays an important role in the lubrication of motorcycle engines, ensuring the stability and reliability of the engine during operation, reducing engine wear caused by insufficient lubrication, and extending the service life of the engine.

[0003] However, the main problem with existing oil pumps is that oil pump components leak significantly, resulting in low pump efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide an oil pump for lubricating motorcycle engines, aiming to solve the technical problem that the main problem of existing oil pumps is that the oil pump parts leak a lot, resulting in low oil pump efficiency.

[0005] To achieve the above objectives, this utility model employs an oil pump for lubricating a motorcycle engine, comprising an oil pump shaft, an inner oil pump rotor, an outer oil pump rotor, and an oil pump housing. The oil pump housing has a shaft hole with a thickness of 3mm to 20mm. The oil pump shaft is disposed within the inner oil pump rotor, the inner oil pump rotor is disposed within the outer oil pump rotor, the outer oil pump rotor is disposed within the oil pump housing, and the oil pump shaft is also rotatably disposed within and through the shaft hole.

[0006] The oil pump housing is provided with an oil pump cover plate, and the oil pump shaft is rotatably disposed in the middle of the oil pump cover plate.

[0007] The oil pump cover plate is provided with a plurality of self-tapping screws, and the oil pump cover plate is mounted on the oil pump housing by means of the self-tapping screws.

[0008] The oil pump shaft is provided with a rotor pin, and the rotor pin is located inside the rotor of the oil pump.

[0009] The oil pump for lubricating a motorcycle engine also includes a locating pin. The oil pump housing has a locating hole, the locating pin is disposed on the oil pump cover plate, and the locating pin is also inserted into the oil pump housing and located in the locating hole.

[0010] This utility model discloses an oil pump for lubricating motorcycle engines. The design of the inner shaft hole thickness of the oil pump housing, ranging from 3mm to 20mm, enhances the stability of the shaft during rotation and reduces oil leakage caused by shaft movement. The rational assembly of the oil pump shaft, inner rotor, and outer rotor, along with the oil pump cover plate securely mounted on the oil pump housing using multiple self-tapping screws, forming a good sealing cavity with the inner and outer rotors, further prevents oil leakage. Simultaneously, the rotor pin ensures synchronous rotation of the inner rotor and the oil pump shaft, while the insertion of the locating pin into the locating hole on the oil pump housing ensures precise positioning between components, collectively improving the working efficiency and reliability of the oil pump. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0012] Figure 1 This is an internal schematic diagram of the oil pump used for lubricating a motorcycle engine according to the present invention.

[0013] Figure 2 This is a schematic diagram of the internal structure of the oil pump housing in the oil pump used for lubricating a motorcycle engine according to this utility model.

[0014] 1-Oil pump shaft, 2-Inner rotor of oil pump, 3-Outer rotor of oil pump, 4-Oil pump housing, 5-Shaft hole, 6-Oil pump cover plate, 7-Self-tapping screw, 8-Rotor pin, 9-Positioning pin, 10-Positioning hole. Detailed Implementation

[0015] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0016] Please see Figures 1 to 2This utility model provides an oil pump for lubricating a motorcycle engine, including an oil pump shaft 1, an inner oil pump rotor 2, an outer oil pump rotor 3, and an oil pump housing 4. The oil pump housing 4 has a shaft hole 5, and the thickness of the shaft hole 5 is 3mm to 20mm. The oil pump shaft 1 is disposed inside the inner oil pump rotor 2, the inner oil pump rotor 2 is disposed inside the outer oil pump rotor 3, the outer oil pump rotor 3 is disposed inside the oil pump housing 4, and the oil pump shaft 1 is also rotatably disposed in the shaft hole 5 and passes through the shaft hole 5.

[0017] In this embodiment, by increasing the thickness of the shaft hole 5 to 3mm to 20mm, the problem of the oil pump shaft 1 moving up and down during rotation caused by the excessively thin shaft hole 5 (original thickness 3mm) in the existing oil pump is effectively solved. The movement will cause the gap between the shaft and the housing to increase, resulting in oil leakage and reducing the efficiency of the oil pump. The thickened shaft hole 5 can still maintain its sealing performance when the shaft moves, reducing the risk of leakage. At the same time, it enhances the support rigidity and avoids damage to the oil pump by the cantilever beam structure, thereby improving the working efficiency and reliability of the oil pump.

[0018] Furthermore, an oil pump cover plate 6 is provided on the oil pump housing 4, and the oil pump shaft 1 is rotatably disposed in the middle of the oil pump cover plate 6.

[0019] In this embodiment, this design reduces the dynamic clearance variation between the shaft and the housing and cover plate, preventing seal failure due to vibration or off-center loading, thereby reducing the probability of leakage.

[0020] Furthermore, the oil pump cover plate 6 is provided with a plurality of self-tapping screws 7, and the oil pump cover plate 6 is mounted on the oil pump housing 4 by means of the self-tapping screws 7.

[0021] In this embodiment, compared with the traditional single-point fixing method, multi-point fastening effectively disperses vibration and pressure loads, avoiding deformation of the sealing surface caused by local stress concentration.

[0022] Furthermore, a rotor pin 8 is provided on the oil pump shaft 1, and the rotor pin 8 is also located inside the inner rotor 2 of the oil pump.

[0023] In this embodiment, this design eliminates changes in the sealed cavity volume caused by speed differences or slippage, thereby maintaining a stable oil outlet pressure.

[0024] Furthermore, the oil pump for lubricating a motorcycle engine also includes a positioning pin 9. The oil pump housing 4 has a positioning hole 10. The positioning pin 9 is disposed on the oil pump cover plate 6 and is also inserted into the oil pump housing 4 and located in the positioning hole 10.

[0025] In this embodiment, this design avoids sealing surface misalignment or uneven gap caused by manual assembly errors, thus ensuring the geometric accuracy of the sealing cavity.

[0026] In this invention, the oil pump shaft 1 is installed in the oil pump housing 4 with a shaft hole 5 having a thickness of 3mm to 20mm to ensure smooth shaft rotation and reduce vertical movement. Then, the inner rotor 2 of the oil pump is fitted onto the oil pump shaft 1, and the outer rotor 3 is placed inside the oil pump housing 4 and meshes with the inner rotor. Next, the rotor pin 8 is used to fix the synchronous rotation relationship between the inner rotor and the shaft, and the oil pump cover plate 6 with multiple self-tapping screws 7 is placed on the housing, and the self-tapping screws 7 are used to fasten and form a sealed cavity. Finally, the positioning pin 9 is inserted into the positioning hole 10 of the housing to precisely align the positions of each component. After startup, oil is drawn in from the oil inlet of the housing, pressurized through the sealed cavity formed by the inner and outer rotors, and output from the oil outlet, completing the lubrication cycle for the motorcycle engine.

[0027] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Those skilled in the art can understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present utility model are still within the scope of the utility model.

Claims

1. An oil pump for lubricating a motorcycle engine, characterized in that, The oil pump includes an oil pump shaft, an inner oil pump rotor, an outer oil pump rotor, and an oil pump housing. The oil pump housing has a shaft hole with a thickness of 3mm to 20mm. The oil pump shaft is disposed inside the inner oil pump rotor, the inner oil pump rotor is disposed inside the outer oil pump rotor, the outer oil pump rotor is disposed inside the oil pump housing, and the oil pump shaft is also rotatably disposed within the shaft hole and passes through the shaft hole.

2. The oil pump for lubricating a motorcycle engine as described in claim 1, characterized in that, An oil pump cover plate is provided on the oil pump housing, and the oil pump shaft is rotatably disposed in the middle of the oil pump cover plate.

3. The oil pump for lubricating a motorcycle engine as described in claim 2, characterized in that, The oil pump cover plate is provided with a plurality of self-tapping screws, and the oil pump cover plate is mounted on the oil pump housing by means of the self-tapping screws.

4. The oil pump for lubricating a motorcycle engine as described in claim 3, characterized in that, The oil pump shaft is provided with a rotor pin, and the rotor pin is located inside the rotor of the oil pump.

5. The oil pump for lubricating a motorcycle engine as described in claim 4, characterized in that, The oil pump for lubricating a motorcycle engine also includes a locating pin. The oil pump housing has a locating hole. The locating pin is disposed on the oil pump cover plate and is also inserted into the oil pump housing and located in the locating hole.

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