Sealing structure of stator outgoing line

Abstract

The utility model relates to a sealing structure of a stator leading-out wire, which comprises an insulating bush connected with a through hole of a casing and a leading-out wire terminal connected with a stator coil, the leading-out wire terminal penetrates through the insulating bush through a binding post and is connected to a wire assembly positioned outside the casing through a welding part, and the binding post is provided with a wiring end connected with the leading-out wire terminal. An elastic washer and an insulation pad are sequentially connected between the wiring end and the inner wall of the machine shell, the insulation bush is provided with a threading hole for the wiring column to penetrate through and a limiting hole with the inner diameter larger than that of the threading hole, the upper portion of the wiring column is provided with a limiting end matched with the inner diameter of the limiting hole, and the inner wall of the limiting hole is connected with a limiting insulation sleeve and a limiting sealing ring which limit the limiting end. And the sealing effect is prevented from being influenced when the binding post is pulled. According to the utility model, the binding post can be prevented from being pulled up and down by pulling force, the sealing effect is improved, the wire assembly can be prevented from being separated from the binding post due to pulling force of the wiring nose to the wire assembly, and the connection quality of the stator outgoing line is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of starter stators, in particular to a sealing structure of a stator lead-out line. Background Art

[0002] The starter, also called a motor, converts the battery's electrical energy into mechanical energy, drives the car engine's flywheel to rotate, and starts the engine. Starters are classified into DC starters, gasoline starters, compressed air starters, etc. according to their working principles. The DC starter uses a DC series-excited motor, and its rotor and stator lead wires are woven with relatively thick rectangular copper wires. During assembly, since the stator lead wire is a braided copper wire, it is necessary to press the copper braided wire into a hard copper plate when passing through the rubber bushing to become the stator lead wire, and then weld the wire assembly to form a lead wire assembly. Its sealing is mainly determined by the interference fit between the hard copper plate and the rubber bushing.

[0003] However, when the starter is actually assembled, there are some problems with the lead wire assembly formed by welding the stator lead wire to the wire assembly: on the one hand, since the wiring nose of the lead wire assembly needs to be fixed on the switch bolt, the lead wire is easily pulled when the nut is tightened, causing a gap between the rubber bushing and the hard copper plate, resulting in air leakage and failing to achieve a sealing effect; on the other hand, welding is generally used to weld the wire assembly to the end face of the stator lead wire. When pulled, the pulling force may cause the wire assembly to separate from the stator lead wire, causing the starter to malfunction. Utility Model Content

[0004] In order to solve the technical problems in the prior art that when the stator lead wire is pulled, a gap is caused between the rubber bushing and the hard copper plate, and the sealing effect cannot be achieved. When it is pulled, the pulling force may cause the wire assembly to separate from the stator lead wire, resulting in starter failure, the utility model provides the following technical solutions.

[0005] The utility model discloses a sealing structure for stator lead wires, comprising an insulating bushing connected to a through hole of a casing and a lead wire terminal connected to a stator coil, wherein the lead wire terminal passes through the insulating bushing through a terminal post and is connected to a wire assembly located outside the casing through a welding portion, the terminal post is provided with a terminal connected to the lead wire terminal and having an outer diameter greater than an inner diameter of the through hole of the casing, an elastic gasket and an insulating pad are connected between the terminal post and an inner wall of the casing in sequence, the insulating bushing is provided with a threading hole for the terminal post to pass through and a limiting hole with an inner diameter greater than the threading hole, a limiting end matching the inner diameter of the limiting hole is provided on the upper part of the terminal post, and a limiting insulating sleeve and a limiting sealing ring for limiting the limiting end are connected to the inner wall of the limiting hole to prevent the sealing effect from being affected when the terminal post is pulled.

[0006] As a further technical solution, the terminal comprises a connecting end welded to the welding portion and located above the limiting end, and a threaded end threadably connected to the terminal.

[0007] As a further technical solution, the cross-sections of the limiting hole and the limiting end are non-circular structures.

[0008] As a further technical solution, a pipe clamp is threadedly connected to one side of the insulating bushing, and the pipe clamp fixes one end of the wire assembly connected to the welding part to one side of the insulating bushing through a bolt.

[0009] As a further technical solution, the limiting insulating sleeve and the limiting sealing ring are connected to the inner wall of the limiting hole by interference fit or gluing.

[0010] As a further technical solution, the insulating bushing is glued or bolted to the casing.

[0011] The beneficial effects of the utility model are as follows: the utility model adopts the method of drilling holes in the casing to make the terminal connected to the lead-out terminal of the stator pass through the casing hole and the insulating pad, and then pass through the inner sealing ring and the insulating bushing, which can not only avoid short circuit caused by contact with the casing, but also fill the gap between the terminal and the casing hole through the compression of the inner sealing ring to achieve a sealing effect. The terminal is provided with a limit end, and the limit end is pressed in the limit hole and the limit insulating sleeve to prevent the pulling force from pulling the terminal up and down, thereby improving the sealing effect. The welding part formed by the wire assembly and the terminal is welded by brazing technology, and the brazing tearing and pulling force is greater than 300N, which is stronger and more resistant to high temperature than ordinary soldering, and a pipe clamp is threadedly connected to one side of the insulating bushing, and the pipe clamp fixes one end of the wire assembly to one side of the insulating bushing by a bolt, so as to prevent the wire assembly from being separated from the terminal due to the pulling force of the terminal nose on the wire assembly, thereby improving the connection quality of the stator lead wire and the wire assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the sealing structure of the stator lead wire of the utility model;

[0013] Figure 2 yes Figure 1 The enlarged schematic diagram of the middle A part;

[0014] In the figure: 1- housing; 2- stator coil; 201- lead wire terminal; 3- terminal; 301- connection end; 302- terminal; 303- threaded end; 304- limit end; 4- welding part; 5- wire assembly; 501- terminal nose; 6- insulating bushing; 601- threading hole; 602- limit hole; 7- elastic gasket; 8- insulating gasket; 9- inner sealing ring; 10- limit insulating sleeve; 11- limit sealing ring; 12- pipe clamp; 13- screw. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0016] In the description of the present invention, it should be understood that the terms "upper", "lower" and "both sides" are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second" and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0017] like Figure 1 and Figure 2 As shown, the utility model provides a sealing structure for stator lead wires, comprising an insulating bushing 6 connected to a through hole of a housing 1 and a lead wire terminal 201 connected to a stator coil 2, wherein the lead wire terminal 201 is connected to a terminal post 3, and the terminal post 3 passes through the insulating bushing 6 and is connected to a wire assembly 5 located outside the housing 1 through a welding portion 4, and a terminal nose 501 is provided at one end of the wire assembly 5. The welding portion 4 can be made of commonly used soldering or brazing technology, because brazing has little deformation, the joint is smooth and beautiful, and no pressure is applied to the wire assembly 5 and the terminal post 3 during brazing, thereby reducing stress at the welding site.

[0018] In a preferred embodiment, the terminal 3 is provided with a terminal 302 connected to the lead-out terminal 201, and the outer diameter of the terminal 302 is larger than the inner diameter of the through hole of the housing 1, so as to prevent the terminal 3 from being separated from the housing 1. An elastic washer 7 and an insulating pad 8 are connected in sequence between the terminal 302 and the inner wall of the housing 1, and the insulating bushing 6 is provided with a threading hole 601 for the terminal 3 to pass through. The terminal 3 extends from the inside of the housing 1 to the outside of the insulating bushing 6 and is welded to the welding portion 4.

[0019] A limiting hole 602 having an inner diameter greater than the threading hole 601 is provided on the upper part of the insulating bushing 6, and a limiting end 304 matching the inner diameter of the limiting hole 602 is provided on the upper part of the terminal 3. A limiting insulating sleeve 10 and a limiting sealing ring 11 for limiting the limiting end 304 are connected to the inner wall of the limiting hole 602, which can prevent the terminal 3 from moving in the axial direction of the insulating bushing 6, so as to prevent the sealing effect from being affected when the terminal 3 is pulled. Preferably, the cross-sections of the limiting hole 602 and the limiting end 304 are non-circular structures, which can prevent the terminal 3 from radially rotating in the insulating bushing 6 and improve the connection stability between the terminal 3 and the wire assembly 5. The insulating bushing 6 and the limiting insulating sleeve 10 are made of wear-resistant insulating material, preferably polytetrafluoroethylene material.

[0020] In the above connection mode, the insulating bushing 6 can be glued or bolted to the housing 1. The limiting insulating sleeve 10 and the limiting sealing ring 11 can be connected to the limiting hole 602 by inner wall interference fit or gluing.

[0021] In a preferred embodiment, the terminal 3 includes a connecting end 301 located above the limiting end 304 welded to the welding portion 4 and a threaded end 303 threadedly connected to the terminal 302. During assembly, the threaded end 303 of the terminal 3 can be inserted into the housing 1 from above the insulating bushing 6. The terminal 302 is provided with a threaded hole, which is threadedly connected to the threaded end 303.

[0022] In a preferred embodiment, a pipe clamp 12 is threadedly connected to one side of the insulating bushing 6. The pipe clamp 12 is a semi-annular structure commonly seen in the prior art. The middle part of the pipe clamp 12 presses the wire assembly 5. The two ends of the pipe clamp 12 are fixed with bolts 13 to one end of the wire assembly 5 connected to the welding part 4 and connected to one side of the insulating bushing 6.

[0023] When the utility model is in use, the insulating bushing 6 is connected to the through hole of the casing 1, and then the threaded end 303 of the terminal 3 is inserted into the casing 1 from above the insulating bushing 6, and the inner sealing ring 9 is assembled on the insulating bushing 6 toward the inside of the casing 1, and the terminal 302 is connected to the lead-out terminal 201; then the elastic gasket 7 and the insulating gasket 8 are connected between the terminal 302 and the inner wall of the casing 1 in sequence, and then the threaded hole of the terminal 302 is threadedly connected to the threaded end 303, and then the limiting insulating sleeve 10 and the limiting sealing ring 11 are sealed and connected to the limiting hole 602, and the limiting end 304 is pressed tightly; then the connecting end 301 of the terminal 3 is welded to the wire assembly 5 through the welding part 4, and then the pipe clamp 12 and the bolt 13 are used to fix one end of the wire assembly 5 to the upper part of the insulating bushing 6, and the sealing and connection of the stator lead-out wire assembly can be completed.

[0024] The preferred specific implementation modes and embodiments of the utility model are described in detail above in conjunction with the accompanying drawings, but the utility model is not limited to the above implementation modes and embodiments, and various changes or equivalent substitutions can be made within the knowledge scope of those skilled in the art without departing from the concept of the utility model. Therefore, the utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the utility model.

Claims

1. A sealing structure for stator lead wires, comprising an insulating bushing (6) connected to a through hole of a housing (1) and a lead wire terminal (201) connected to a stator coil (2), wherein the lead wire terminal (201) passes through the insulating bushing (6) via a terminal post (3) and is connected to a wire assembly (5) located outside the housing (1) via a welding portion (4), characterized in that: The terminal (3) is provided with a terminal (302) connected to the lead-out terminal (201) and having an outer diameter greater than the inner diameter of the through hole of the housing (1); an elastic gasket (7) and an insulating gasket (8) are connected in sequence between the terminal (302) and the inner wall of the housing (1); the insulating bushing (6) is provided with a threading hole (601) for the terminal (3) to pass through and a limiting hole (602) having an inner diameter greater than the threading hole (601); a limiting end (304) matching the inner diameter of the limiting hole (602) is provided on the upper part of the terminal (3); a limiting insulating sleeve (10) and a limiting sealing ring (11) for limiting the limiting end (304) are connected to the inner wall of the limiting hole (602) to prevent the sealing effect from being affected when the terminal (3) is pulled.

2. The sealing structure of the stator lead wire according to claim 1, characterized in that: The terminal (3) comprises a connecting end (301) welded to a welding portion (4) and located above a limiting end (304), and a threaded end (303) threadedly connected to the terminal (302).

3. The sealing structure of the stator lead wire according to claim 1, characterized in that: The cross-sections of the limiting hole (602) and the limiting end (304) are non-circular structures.

4. The sealing structure of the stator lead wire according to claim 1, characterized in that: One side of the insulating bushing (6) is threadedly connected to a pipe clamp (12), and the pipe clamp (12) fixes one end of a wire assembly (5) connected to the welding portion (4) to one side of the insulating bushing via a bolt (13).

5. The sealing structure of the stator lead wire according to claim 1, characterized in that: The limiting insulating sleeve (10) and the limiting sealing ring (11) are connected to the inner wall of the limiting hole (602) by interference fit or gluing.

6. The sealing structure of the stator lead wire according to claim 1, characterized in that: The insulating bushing (6) is glued or bolted to the casing (1).

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