Shell connecting structure of miniature brushless oil pump

Abstract

The utility model relates to a miniature brushless oil pump shell connecting structure, which belongs to the technical field of oil pump shells, and comprises a pump body, a motor, an electric wire and a shell, the side wall of one side of the pump body is provided with an inward concave trapezoidal ring groove I, the trapezoidal ring groove I and the side surface of the pump body form a convex disc structure, and the junction of one side of a convex disc of the pump body and the side wall of the pump body is provided with a notch groove; the side, provided with the notch groove, of the pump body is connected with the motor, the electric wire is connected to the motor and extends out of the pump body through the notch groove, an opening is formed in one side of the shell, and a second trapezoidal ring groove sunken towards the outer wall is formed in the inner wall of the opening side of the shell. The shell covers the motor and is clamped to the outer circle of the convex disc through the second trapezoidal ring groove to be in interference fit with the pump body, and the shell covers a notch groove in one side of the first trapezoidal ring groove to the motor. Interference fit avoids tedious processing and assembling of lock screws, the notch grooves facilitate wire passing and heat dissipation, and meanwhile the notch grooves facilitate subsequent disassembly and assembly errors.

Description

Technical Field

[0001] This utility model relates to the field of oil pump housing technology, and in particular to a connection structure for a miniature brushless oil pump housing. Background Technology

[0002] Miniature brushless oil pumps are lightweight and compact pumps that are widely used in small devices such as model aircraft engines.

[0003] Currently, some oil pumps use screws to connect the motor, housing, and pump body. Screw connections require machining many holes and assembly, increasing the number of parts and the size of the pump. Others use glue to connect the housing and pump body, which is difficult to install, prone to leakage, and makes subsequent disassembly very difficult. Therefore, this utility model proposes a housing connection structure for a miniature brushless oil pump. Utility Model Content

[0004] The purpose of this invention is to provide a connecting structure for the housing of a miniature brushless oil pump, so as 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 miniature brushless oil pump housing connection structure includes a pump body, a motor, wires, and a housing. One side wall of the pump body has an inwardly recessed trapezoidal annular groove, which forms a convex structure with the side wall of the pump body. A notch is formed at the intersection of the convex side of the pump body and the side wall of the pump body, separating the trapezoidal annular groove. The side of the pump body with the notch is connected to the motor. The wires are connected to the motor and extend out of the pump body through the notch. One side of the housing has an opening, and the inner wall of the opening side of the housing has a second trapezoidal annular groove that is recessed outward. The housing covers the motor and is engaged with the outer circle of the convex by the second trapezoidal annular groove, forming an interference fit with the pump body. The housing also covers the notch of the trapezoidal annular groove on the motor side.

[0007] Preferably, the notch is a right-angled notch, and the wire is vertically arranged in the notch and extends to the outside of the pump body.

[0008] Preferably, the motor is provided with a screw hole, and the pump body is connected with a bolt that matches the screw hole, and the pump body and the motor are connected through the bolt screw hole.

[0009] Compared with the prior art, the beneficial effects of this utility model are:

[0010] This utility model uses a slight interference fit between the pump body and the outer casing via a press-fit method, directly pressing the outer casing tightly into the pump body, avoiding cumbersome processing and assembly with screws; in addition, a notch is cut into the pump body to allow the wires to pass through easily, and the outer casing will cover half of the notch after installation, without affecting the appearance, and at the same time, it also serves to dissipate heat from the motor; furthermore, the notch is set in a position to facilitate subsequent disassembly of the outer casing, and the notch is also selected to prevent incorrect assembly of the motor and wires. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 Structural breakdown of this utility model Figure 1 ;

[0013] Figure 3 Structural breakdown of this utility model Figure 2 ;

[0014] Figure 4 This is a schematic diagram of the pump body structure of this utility model;

[0015] Figure 5 This is a schematic diagram of the outer shell structure of this utility model.

[0016] Figure Labels

[0017] 1. Pump body, 11. Bolt, 12. Trapezoidal annular groove one, 13. Protrusion, 14. Notch groove, 2. Motor, 21. Screw hole, 3. Wire, 4. Housing, 41. Trapezoidal annular groove two. Detailed Implementation

[0018] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structure, features and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0019] like Figure 1-5 As shown, a miniature brushless oil pump housing 4 connection structure includes a pump body 1, a motor 2, wires 3, and a housing 4. A trapezoidal annular groove 12 is provided on one side wall of the pump body 1, and the trapezoidal annular groove 12 and the side wall of the pump body 1 form a convex plate 13 structure. A notch 14 is provided at the intersection of one side of the convex plate 13 and the side wall of the pump body 1, and the notch 14 separates the trapezoidal annular groove 12. The side of the pump body 1 with the notch 14 is connected to the motor 2. The motor 2 is provided with a screw hole 21, and the pump body 1 is connected with a bolt 11 that matches the screw hole 21. The pump body 1 and the motor 2 are connected through the bolt 11 and the screw hole 21.

[0020] The wire 3 is connected to the motor 2 and extends out of the pump body 1 through the notch 14. The notch 14 is a right-angled groove. The wire 3 is vertically installed in the notch 14 and extends out of the pump body 1. The outer shell 4 has an opening on one side. The inner wall of the opening side of the outer shell 4 has a trapezoidal annular groove 41 that is recessed outward. The outer shell 4 covers the motor 2 and is pressed and engaged with the outer circle of the cam 13 through the trapezoidal annular groove 41. It is in an interference fit with the pump body 1. The outer shell 4 covers the notch 14 on the side of the trapezoidal annular groove 12 facing the motor 2.

[0021] The pump body 1 and the outer casing 4 are slightly press-fitted together. During assembly, the outer casing 4 is directly pressed into the pump body 1, avoiding cumbersome machining and screw tightening operations. In addition, a notch 14 is cut on the pump body 1 to allow the wire 3 to pass through easily. The notch 14 is located at and separates the trapezoidal annular groove 12. After the outer casing 4 is installed, it will cover half of the notch 14, which will not affect the appearance and will also serve to dissipate heat from the motor 2. Furthermore, the notch 14 is positioned to facilitate the subsequent disassembly of the outer casing 4, and the notch position also helps to prevent the motor 2 and the wire 3 from being assembled in the wrong position.

[0022] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A connecting structure for the housing of a miniature brushless oil pump, characterized in that: The pump body includes a pump body, a motor, wires, and a housing. One side wall of the pump body has an inwardly recessed trapezoidal annular groove, which forms a convex structure with the side wall of the pump body. A notch is formed at the intersection of the convex side of the pump body and the side wall of the pump body, separating the trapezoidal annular groove. The side of the pump body with the notch is connected to the motor. The wires are connected to the motor and extend out of the pump body through the notch. One side of the housing has an opening, and the inner wall of the opening side of the housing has a second trapezoidal annular groove that is recessed outward. The housing covers the motor and is engaged with the outer circle of the convex side by the second trapezoidal annular groove, forming an interference fit with the pump body. The housing also covers the notch on the side of the trapezoidal annular groove facing the motor.

2. The miniature brushless oil pump housing connection structure according to claim 1, characterized in that: The notch is a right-angled groove, and the wire is vertically installed in the notch and extends to the outside of the pump body.

3. The miniature brushless oil pump housing connection structure according to claim 1, characterized in that: The motor has a screw hole, and the pump body is connected with a bolt that matches the screw hole. The pump body and the motor are connected through the bolt screw hole.

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