Electric oil pump connection structure

Abstract

The utility model provides a kind of electric oil pump connecting structure, comprising: adapter disc, central hole and the first installation hole group and the second installation hole group around the outer periphery of central hole are opened on adapter disc;Motor is fixedly connected with the first installation hole group on adapter disc by first threaded fastener, and oil pump head is fixedly connected with the second installation hole group on adapter disc by second threaded fastener, and the output shaft of motor or the input shaft of oil pump head penetrates the central hole on adapter disc, and is connected with another party transmission connection.The utility model improves the coaxiality between motor and oil pump head, guarantees the stability and reliability of power transmission, simplifies overall assembly process, improves production and maintenance efficiency.At the same time, the adapter disc structure is compact, and versatility is strong, provides flexible solution for the matching of different specifications motor and oil pump head, enhances the adaptability and market competitiveness of product.

Description

Technical Field

[0001] This utility model relates to the technical field of connecting the motor and pump head of an electric oil pump, and specifically to a connection structure for an electric oil pump. Background Technology

[0002] Electric hydraulic pumps, as core hydraulic power components, are widely used in automobiles, construction machinery, and industrial equipment. Their performance and reliability largely depend on the stability and precision of the connection structure between the motor and the pump head.

[0003] Traditional electric hydraulic pumps typically use direct docking or simple connecting components to fix the motor and pump head. In practical applications, these traditional structures have gradually revealed several drawbacks: First, manufacturing errors may exist in the mounting interfaces of the motor and pump head, making it difficult to guarantee extremely high coaxiality when directly docking. This leads to a risk of misalignment between the motor output shaft and the pump head input shaft, causing not only increased vibration and noise but also accelerated wear of transmission components, severely impacting service life and reliability. Second, the separate connection method makes the assembly process cumbersome, requiring repeated adjustments and alignments of two independent components, reducing production efficiency and causing inconvenience for subsequent maintenance. Furthermore, for applications requiring matching and combining motors and pump heads of different models or brands, the traditional structure has poor adaptability and lacks a universal, standardized connection interface, limiting the flexibility and modularity of product design.

[0004] Therefore, there is an urgent need in this field for a new type of connection structure to solve the problems of insufficient alignment accuracy, low assembly efficiency, and low modularity in the existing technologies. Utility Model Content

[0005] In order to solve the technical problems existing in the background art, this utility model proposes an electric oil pump connection structure.

[0006] The present invention proposes an electric oil pump connection structure, comprising: an adapter plate, wherein the adapter plate has a central hole and a first mounting hole group and a second mounting hole group surrounding the central hole;

[0007] The motor is fixedly connected to the first mounting hole group on the adapter plate by the first threaded fastener, and the oil pump head is fixedly connected to the second mounting hole group on the adapter plate by the second threaded fastener. The output shaft of the motor or the input shaft of the oil pump head passes through the center hole on the adapter plate and is connected to the other party for transmission.

[0008] Preferably, the end cover of the motor is provided with a first connecting hole group surrounding the outer periphery of its output shaft; the end cover of the oil pump head is provided with a second connecting hole group surrounding the outer periphery of its input shaft; the first mounting hole group is adapted to the first connecting hole group and connected by a first threaded fastener, and the second mounting hole group is adapted to the second connecting hole and connected by a second threaded fastener.

[0009] Preferably, both the first mounting hole group and the second mounting hole group include multiple mounting holes, and the mounting holes in the first mounting hole group and the mounting holes in the second mounting hole group are arranged at circumferential and / or radial distances from the central hole.

[0010] Preferably, each mounting hole in the second mounting hole group surrounds the outer periphery of the central hole; each mounting hole in the first mounting hole group surrounds the outer periphery of the second mounting hole group.

[0011] Preferably, the mounting holes in the first mounting hole group and the mounting holes in the second mounting hole group are arranged alternately around the outer periphery of the central hole.

[0012] Preferably, the adapter plate includes a plate body and a plurality of protrusions evenly distributed around the contour edge of the plate body and integrally formed with the plate body. Each protrusion has a mounting hole, and the mounting holes on all the protrusions together form a first mounting hole group. A through hole is formed in the center of the plate body to form a central hole, and a plurality of mounting holes are formed around the outer periphery of the central hole. All the mounting holes on the plate body together form a second mounting hole group.

[0013] Preferably, the motor output shaft has an axial blind hole at its end; the input shaft of the oil pump head passes through the central hole on the adapter plate, and its end is inserted into the axial blind hole, and can be circumferentially fixed and axially slidable relative to the axial blind hole.

[0014] Preferably, the portion of the input shaft located in the axial blind hole is connected to the axial blind hole by a spline or a key.

[0015] In this invention, two mounting hole groups (i.e., a first mounting hole group and a second mounting hole group) are integrated on the same adapter plate to respectively match the installation of the motor and the oil pump head. The motor connects to the adapter plate through the first mounting hole group, and the oil pump head connects to the adapter plate through the second mounting hole group. This modular and integrated connection of the motor and oil pump head is achieved through a single adapter plate. This structure effectively solves the problems of poor alignment accuracy, cumbersome installation, and non-compact structure inherent in traditional split connection methods. It improves the coaxiality between the motor and the oil pump head, ensuring smooth and reliable power transmission, simplifying the overall assembly process, and improving production and maintenance efficiency. Furthermore, the adapter plate has a compact structure and strong versatility, providing a flexible solution for matching motors and oil pump heads of different specifications, enhancing product adaptability and market competitiveness. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the adapter plate in the electric oil pump connection structure proposed in this utility model;

[0017] Figure 2 This is a schematic diagram illustrating the principle of connecting the motor and the pump head via the adapter plate in the electric oil pump connection structure proposed in this utility model.

[0018] Figure 3 This is a cross-sectional view of the adapter plate in the electric oil pump connection structure proposed in this utility model when connecting the motor and the oil pump head. Detailed Implementation

[0019] Example 1: Basic structure of electric oil pump connection structure

[0020] Reference Figure 1-3 The present invention proposes an electric oil pump connection structure, comprising: an adapter plate 1, which enables modular connection between the motor 2 and the oil pump head 3 via the adapter plate 1. The specific structural design is as follows:

[0021] The adapter plate 1 is generally disc-shaped, and has a central hole 11, a first mounting hole group 12, and a second mounting hole group 13. The central hole 11 is located at the geometric center of the adapter plate 1. The first mounting hole group 12 and the second mounting hole group 13 each include multiple mounting holes and surround the outer periphery of the central hole 11.

[0022] During installation, the motor 2 is fixedly connected to the first mounting hole group 12 on the adapter plate 1 via a first threaded fastener (e.g., a screw) passing through the first connecting hole group on its end cover. The oil pump head 3 is fixedly connected to the second mounting hole group 13 on the adapter plate 1 via a second threaded fastener (e.g., a screw) passing through the second connecting hole group on its end cover.

[0023] The output shaft 21 of motor 2 or the input shaft 31 of oil pump head 3 passes through the central hole 11 and is connected to the other for transmission. Specifically, the output shaft 21 of motor 2 can pass through the central hole 11 and couple with the input shaft 31 of oil pump head 3, or the input shaft 31 of oil pump head 3 can pass through the central hole 11 and couple with the output shaft 21 of motor 2, thereby realizing the transmission of power.

[0024] Example 2: Optimization of mounting hole layout

[0025] Based on Example 1, Example 2 further optimizes the layout of the first mounting hole group 12 and the second mounting hole group 13, as follows:

[0026] The holes in the first mounting hole group 12 and the holes in the second mounting hole group 13 are spaced apart in both the circumferential and radial directions of the central hole 11. Specifically, the holes in the second mounting hole group 13 are closer to the central hole 11 and are arranged around its outer periphery; while the holes in the first mounting hole group 12 are arranged around the outer periphery of the second mounting hole group 13. This layered layout makes the connection force distribution more uniform, and the structure more compact and stable.

[0027] As another preferred embodiment, the mounting holes of the first mounting hole group 12 and the second mounting hole group 13 can also be arranged alternately around the outer periphery of the central hole 11. That is, the mounting holes of the first mounting hole group 12 and the mounting holes of the second mounting hole group 13 are arranged adjacent to each other in the circumferential direction. This staggered layout can make full use of the circumferential space of the adapter plate 1 and helps to reduce the overall radial dimension of the adapter plate 1.

[0028] Example 3: Structural optimization of adapter plate 1

[0029] Based on Example 1, Example 3 further optimizes the structure of the adapter plate 1, as follows:

[0030] The adapter plate 1 includes a circular plate body 1A and multiple circumferentially distributed protrusions 1B along the outline of the plate body 1A. These protrusions 1B are integrally formed with the plate body 1A, for example, by casting or forging in one piece, ensuring the overall structural strength and dimensional accuracy.

[0031] The mounting holes of the first mounting hole group 12 are correspondingly provided on each of the external protrusions 1B. The central hole 11 is a through hole located at the center of the disk body 1A. The mounting holes of the second mounting hole group 13 are provided on the disk body 1A and surround the outer periphery of the central hole 11.

[0032] This design, which places the connection point on the protruding part 1B, enhances the connection rigidity and vibration resistance, while providing ample space for the installation of the internal oil pump head 3.

[0033] Example 4: The specific design of the output shaft 21 and the input shaft 31 is as follows:

[0034] The output shaft 21 of motor 2 has an axial blind hole at its end. The input shaft 31 of oil pump head 3 passes through the central hole 11 on adapter plate 1, and its end is directly inserted into the axial blind hole of output shaft 21. A circumferentially fixed and axially sliding fit is formed between the end of input shaft 31 and the inner wall of the axial blind hole. The specific fit can be achieved in the following way:

[0035] Spline connection: A spline is machined on the outer surface of the input shaft 31 end and the inner surface of the axial blind hole to mate with each other. Spline connection can transmit large torque and has good centering.

[0036] Keyed connection: A keyway is provided at the end of the input shaft 31 and in the axial blind hole, and a flat key is used for connection. This method is simple to process and has a low cost.

[0037] This structural design facilitates quick connection and separation between shafts, and the axial sliding fit design can compensate for minor axial dimensional chain errors that may occur between the motor 2 and the oil pump head 3 during assembly and operation.

[0038] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An electric oil pump connection structure, characterized in that, include: The adapter plate (1) has a central hole (11) and a first mounting hole group (12) and a second mounting hole group (13) surrounding the outer periphery of the central hole (11); The motor (2) is fixedly connected to the first mounting hole group (12) on the adapter plate (1) by the first threaded fastener, and the oil pump head (3) is fixedly connected to the second mounting hole group (13) on the adapter plate (1) by the second threaded fastener. The output shaft (21) of the motor (2) or the input shaft (31) of the oil pump head (3) passes through the center hole (11) on the adapter plate (1) and is connected to the other party for transmission.

2. The electric oil pump connection structure according to claim 1, characterized in that, The end cover of the motor (2) is provided with a first connecting hole group surrounding the outer periphery of its output shaft (21); the end cover of the oil pump head (3) is provided with a second connecting hole group surrounding the outer periphery of its input shaft (31); the first mounting hole group (12) is adapted to the first connecting hole group and connected by a first threaded fastener, and the second mounting hole group (13) is adapted to the second connecting hole and connected by a second threaded fastener.

3. The electric oil pump connection structure according to claim 1, characterized in that, Both the first mounting hole group (12) and the second mounting hole group (13) include multiple mounting holes, and the mounting holes in the first mounting hole group (12) and the mounting holes in the second mounting hole group (13) are arranged at circumferential and / or radial distances from each other in the central hole (11).

4. The electric oil pump connection structure according to claim 3, characterized in that, Each mounting hole in the second mounting hole group (13) surrounds the outer periphery of the central hole (11); each mounting hole in the first mounting hole group (12) surrounds the outer periphery of the second mounting hole group (13).

5. The electric oil pump connection structure according to claim 3, characterized in that, The mounting holes in the first mounting hole group (12) and the mounting holes in the second mounting hole group (13) are arranged alternately around the outer periphery of the central hole (11).

6. The electric oil pump connection structure according to claim 4, characterized in that, The adapter plate (1) includes a plate body (1A) and multiple protrusions (1B) that are circumferentially distributed on the contour edge of the plate body (1A) and integrally formed with the plate body (1A). Each protrusion (1B) is provided with a mounting hole, and the mounting holes on all the protrusions (1B) together form the first mounting hole group (12). The center of the plate body (1A) is provided with a through hole to form a central hole (11). The plate body (1A) is provided with multiple mounting holes around the outer periphery of the central hole (11), and all the mounting holes on the plate body (1A) together form the second mounting hole group (13).

7. The electric oil pump connection structure according to claim 1, characterized in that, The output shaft (21) of the motor (2) is provided with an axial blind hole at its end; the input shaft (31) of the oil pump head (3) passes through the center hole (11) on the adapter plate (1), and its end is inserted into the axial blind hole, and can be circumferentially fixed and axially slid relative to the axial blind hole.

8. The electric oil pump connection structure according to claim 7, characterized in that, The input shaft (31) is located in the axial blind hole and is connected to the axial blind hole by spline or key.

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