A motor wiring structure

Abstract

The utility model relates to a local structure of a motor, in particular to a high-voltage wiring structure of a motor, including a motor housing, a motor connecting wire, an external connecting wire and a junction box, wherein a first wiring hole is provided on the inner wall of the junction box, an insulating seat is fixedly connected to the inner cavity of the junction box, a wiring slot is provided on the insulating seat, a second wiring hole is provided at the bottom of the wiring slot, a wiring terminal is fixedly connected to the motor connecting wire, a connecting bolt is spirally connected to the wiring terminal, a wiring piece is clamped between the nut of the connecting bolt and the bottom of the wiring slot, and one end of the external connecting wire passes through the first wiring hole and is directly or indirectly pressed between the wiring piece and the bottom of the wiring slot. Since the motor connecting wire and the external connecting wire are quickly connected by the spiral connection of the connecting bolt and the connecting terminal, it is labor-saving, has relatively high production efficiency, is easy to realize automated production, and has relatively small quality risks.

Description

Technical Field

[0001] The utility model relates to a local structure of a motor, in particular to a high-voltage wiring structure of a motor. Background Art

[0002] A junction box is usually provided on the motor to connect various wires inside the motor with corresponding wires outside the motor. The junction box and the corresponding wire connection structure together constitute the motor wiring structure.

[0003] The existing motor wiring structure usually requires the wires inside the motor (i.e., motor connecting wires) to be passed through the junction box and connected to the wires outside the motor (i.e., external connecting wires). Sometimes welding operations are required, which is time-consuming and labor-intensive, affecting production efficiency. In addition, the firmness of the connection depends largely on the workers' experience (such as welding cold solder joints, etc.), and there is a quality risk of connection detachment.

[0004] In view of this, the applicant conducted an in-depth study on the motor wiring structure, which resulted in this case. Utility Model Content

[0005] The utility model aims to provide a motor wiring structure with relatively high production efficiency and relatively small quality risks.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A motor wiring structure comprises a motor housing, a motor connection line, an external connection line and a terminal box fixedly connected or integrally connected to the motor housing, wherein the inner wall of the terminal box is provided with a through hole communicating with the inner cavity of the motor housing and a first wiring hole communicating with the outside, the inner cavity of the terminal box is also fixedly connected with an insulating seat covering the through hole, the insulating seat is provided with a wiring groove arranged corresponding to the first wiring hole, the bottom of the wiring groove is provided with a second wiring hole communicating with the inner cavity of the motor housing, the motor connection line is fixedly connected with a wiring terminal inserted in the second wiring hole, the outer side wall of the wiring terminal is fixedly connected or integrally connected with a positioning ring abutting on the side of the insulating seat facing the inner cavity of the motor housing, the wiring terminal is spirally connected with a connecting bolt inserted in the second wiring hole at the same time, the nut of the connecting bolt is located in the wiring groove, and a wiring piece is clamped between the nut of the connecting bolt and the bottom of the wiring groove, one end of the external connecting line passes through the first wiring hole and is directly or indirectly pressed between the wiring piece and the bottom of the wiring groove.

[0008] As an improvement of the utility model, a first sealing ring surrounding the through hole is arranged between the insulating seat and the junction box, and a second sealing ring surrounding the second wiring hole is arranged between the positioning ring and the insulating seat.

[0009] As an improvement of the present invention, the junction box comprises a box body and a cover body which are detachably fixedly connected to each other, and a third sealing ring is arranged between the box body and the cover body.

[0010] As an improvement of the present invention, the bottom of the wiring slot is provided with positioning slots at positions on both sides of the second wiring hole, and positioning blocks cooperating with the corresponding positioning slots are respectively provided at both ends of the wiring piece.

[0011] As an improvement of the present invention, the second wiring hole is a non-rotating hole.

[0012] As an improvement of the present utility model, there are three first wiring holes and three wiring slots respectively, an isolation block is formed between two adjacent wiring slots, a mounting hole is opened on the isolation block, and a mounting bolt screwed to the wiring box or the motor housing is inserted into the mounting hole.

[0013] As an improvement of the utility model, a first blind hole is further provided on the isolation block, and a second blind hole is provided on the side of the insulation seat facing the inner cavity of the motor housing at a position corresponding to the first blind hole.

[0014] By adopting the above scheme, the utility model has the following beneficial effects:

[0015] 1. With the motor wiring structure provided by the utility model, the motor connection wires and the external connection wires can be quickly connected through the spiral connection of the connecting bolts and the wiring terminals, which saves trouble and labor, has relatively high production efficiency and is easy to realize automated production. At the same time, since the spiral connection is used to connect the internal and external wires, it only needs to tighten the connecting bolts, which usually will not fall off, and the quality risks are relatively small.

[0016] 2. By setting a sealing ring, it is possible to effectively prevent the hot air generated in the inner cavity of the motor housing from entering the junction box and then being cooled to produce condensed water, which helps to increase the service life of the motor and reduce the failure rate of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the motor wiring structure of the utility model;

[0018] Figure 2 It is a schematic cross-sectional structure diagram of the motor wiring structure of the utility model at the junction box position;

[0019] Figure 3 It is a structural schematic diagram of the insulating seat in the utility model;

[0020] Figure 4 It is a structural schematic diagram of the connecting piece in the utility model.

[0021] The markings in the figure correspond to the following:

[0022] 10-motor housing; 20-motor connecting wire;

[0023] 21-connection terminal; 22-positioning ring;

[0024] 23-connecting bolt; 30-junction box;

[0025] 31-box body; 32-cover body;

[0026] 33-third sealing ring; 34-first wiring hole;

[0027] 35-first sealing ring; 40-insulating seat;

[0028] 41-wiring slot; 42-isolating block;

[0029] 43-mounting hole; 44-first blind hole;

[0030] 45-second wiring hole; 46-positioning groove;

[0031] 47-second sealing ring; 50-connecting piece;

[0032] 51-Positioning block. DETAILED DESCRIPTION

[0033] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0034] like Figure 1-Figure 4 As shown, the present embodiment provides a motor wiring structure, including a motor housing 10, a motor connecting wire 20, an external connecting wire (not shown in the figure), and a terminal box 30 fixedly connected or integrally connected to the motor housing 10, wherein there are multiple motor connecting wires 20 and external connecting wires respectively and they correspond one to one. The specific motor connecting wires 20 and external connecting wires are conventional wires, which are not the focus of the present embodiment and will not be described in detail here.

[0035] The junction box 30 can be a junction box used in conventional motors. In the present embodiment, the junction box 20 includes a box body 31 and a cover body 32 which are detachably fixedly connected to each other, wherein the box body 31 is integrally connected to the front cover or the rear cover of the motor housing 10, and the box body 31 has an opening arranged away from the motor housing 10. The cover body 31 covers the opening and is detachably connected to the box body 31 by screws, and a third sealing ring 33 is arranged between the box body 31 and the cover body 32 to prevent external water vapor from entering.

[0036] The inner wall of the junction box 30 is provided with a through hole connected to the inner cavity of the motor housing 10 and a first wiring hole 34 connected to the outside, where the outside refers to the outside of the motor housing 10 and the junction box 30. Since there are usually multiple external connection lines, there are also multiple first wiring holes 34. In this embodiment, three first wiring holes 34 are used as an example to illustrate which first wiring holes 34 are arranged in a straight line. The inner cavity of the junction box 20 is also fixedly connected to an insulating seat 40 covering the through hole, that is, the insulating seat 40 covers the mouth of the through hole. Preferably, a first sealing ring 35 surrounding the through hole is arranged between the insulating seat 40 and the bottom wall of the inner cavity of the junction box 30 to prevent the hot air generated in the inner cavity of the motor housing 10 from entering the junction box 30 and generating condensed water when it is cooled during use.

[0037] The insulating seat 40 is provided with wiring slots 41 arranged one-to-one with each first wiring hole 34, that is, there are three wiring slots 41, and an isolation block 42 is formed between two adjacent wiring slots 41. Each isolation block 42 is provided with a mounting hole 43, and a mounting bolt (not shown in the figure) screwed to the terminal box 30 or the motor housing 10 is inserted into the mounting hole 43, so as to achieve a fixed connection between the insulating seat 40 and the terminal box 30. Preferably, in this embodiment, each isolation block 42 is also provided with at least one first blind hole 44, and the insulating seat 40 is provided with a second blind hole at a position corresponding to each first blind hole 44 on one side of the inner cavity of the motor housing 10, but the first blind holes 44 and the second blind holes corresponding to each other are not connected to each other, so that not only can the shrinkage phenomenon of the insulating seat 40 be avoided during injection molding, but also the weight of the motor can be reduced.

[0038] The bottom of each wiring slot 41 is provided with a second wiring hole 45 connected to the inner cavity of the motor housing 10. The second wiring hole 45 is preferably a non-rotating hole, for example, a square hole or a waist-shaped hole. In this embodiment, the second wiring hole 45 is a waist-shaped hole as an example for description. In addition, the bottom of each wiring slot 41 is provided with positioning grooves 46 at positions on both sides of the second wiring hole 45.

[0039] Each motor connection line 20 is fixedly connected with a terminal 21 inserted into each second wiring hole 45 one by one, and the outer wall of the terminal 21 is fixedly connected or integrally connected with a positioning ring 22 that abuts on the side of the insulating seat 40 facing the inner cavity of the motor housing 10, and the cross-sectional profile shape of the portion where the terminal 21 penetrates the corresponding second wiring hole 45 is the same as the cross-sectional profile shape of the second wiring hole 45. Preferably, the positioning ring 22 is a copper ring, and a second sealing ring 47 surrounding the corresponding second wiring hole 45 is provided between each positioning ring 22 and the insulating seat 40 to prevent the hot air generated in the inner cavity of the motor housing 10 from entering the terminal box 30 and generating condensed water when it is cooled during use. In addition, the mouth of each second wiring hole facing the motor housing 10 is a bell mouth, and the second sealing ring 47 is located in the bell mouth, which can ensure that even if the connecting bolts 23 mentioned below are slightly loose, the sealing will not be affected.

[0040] The connection terminal 21 is spirally connected with a connection bolt 23 which is inserted into the corresponding second connection hole 45. The connection bolt 23 is preferably a carbon steel bolt, and its nut is located in the connection slot 41, so that the connection terminal 21 can be pulled by the connection bolt 23 to achieve connection and conduction. A connection piece 50 is sandwiched between the nut of the connection bolt 23 and the bottom of the connection slot 41. The connection piece 50 is a copper piece, and positioning blocks 51 that match the corresponding positioning slots 46 are respectively provided at both ends of the connection piece 50.

[0041] One end of each external connection line passes through the first wiring hole 34 one by one and is pressed between the wiring piece 50 and the bottom of the corresponding wiring slot 41 directly or indirectly through a pressing piece fixedly connected to the external connection line, thereby achieving electrical connection.

[0042] Before assembling the motor wiring structure provided in this embodiment, the wiring terminal 21 and the corresponding motor connection wire need to be fixedly connected together by welding or other means. During assembly, the corresponding external connection wire is first inserted between the wiring piece 50 and the bottom of the corresponding wiring slot 41, and then the wiring terminal 21 is inserted into the corresponding second wiring hole and locked with the connecting bolt 23, so that the connection of the external wire inside the motor can be achieved. The assembly efficiency is high, and the connection firmness and stability are relatively high.

[0043] The present invention is described in detail above with reference to the accompanying drawings, but the embodiments of the present invention are not limited to the above embodiments. Those skilled in the art can make various equivalent substitutions for the present invention based on the prior art, which all belong to the protection scope of the present invention.

Claims

1. A motor wiring structure, comprising a motor housing, a motor connecting wire, an external connecting wire, and a terminal box fixedly connected or integrally connected to the motor housing, characterized in that: The inner wall of the junction box is provided with a through hole connected to the inner cavity of the motor housing and a first wiring hole connected to the outside. The inner cavity of the junction box is also fixedly connected to an insulating seat covering the through hole, and the insulating seat is provided with a wiring groove arranged corresponding to the first wiring hole. The bottom of the wiring groove is provided with a second wiring hole connected to the inner cavity of the motor housing, and the motor connecting line is fixedly connected with a wiring terminal inserted in the second wiring hole. The outer side wall of the wiring terminal is fixedly connected or integrally connected with a positioning ring that abuts on the side of the insulating seat facing the inner cavity of the motor housing. A connecting bolt that is simultaneously inserted in the second wiring hole is spirally connected to the wiring terminal, and the nut of the connecting bolt is located in the wiring groove, and a wiring piece is clamped between the nut of the connecting bolt and the bottom of the wiring groove, and one end of the external connecting line passes through the first wiring hole and is directly or indirectly pressed between the wiring piece and the bottom of the wiring groove.

2. The motor connection structure according to claim 1, characterized in that: A first sealing ring surrounding the through hole is arranged between the insulating seat and the junction box, and a second sealing ring surrounding the second wiring hole is arranged between the positioning ring and the insulating seat.

3. The motor connection structure according to claim 1, characterized in that: The junction box comprises a box body and a cover body which are detachably fixedly connected to each other, and a third sealing ring is arranged between the box body and the cover body.

4. The motor connection structure according to claim 1, characterized in that: The bottom of the wiring slot is provided with positioning slots at positions on both sides of the second wiring hole, and positioning blocks matching the corresponding positioning slots are respectively provided at both ends of the wiring piece.

5. The motor connection structure according to claim 1, characterized in that: The second wiring hole is a non-rotating hole.

6. The motor connection structure according to any one of claims 1 to 5, characterized in that: There are three first wiring holes and three wiring slots respectively, and an isolation block is formed between two adjacent wiring slots. The isolation block is provided with a mounting hole, and the mounting hole is inserted with a mounting bolt that is screwed to the terminal box or the motor housing.

7. The motor connection structure according to claim 6, characterized in that: A first blind hole is also formed on the isolation block, and a second blind hole is formed on a side of the insulation seat facing the inner cavity of the motor housing at a position corresponding to the first blind hole.

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