JP2001115934A - Starter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve supporting strength of a contact part of an outer wall body. SOLUTION: A supporting part 202 protruded outside from the outer wall body 2 is supported so as to prevent rotation of the contact part 22 for connecting a battery harness.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a starter for starting an engine, and more particularly to a support structure for a contact portion for connecting a battery harness of the starter and an outer wall.

[0002]

2. Description of the Related Art FIG. 12 is a cross-sectional view showing a mounting structure of a contact portion to an outer wall in a starter disclosed in Japanese Patent Application Laid-Open No. 10-266933. In FIG. 12, 100 is a yoke as one outer wall, 101 is a bracket as another outer wall, and 102 is a contact provided so as to penetrate inside and outside of the outer wall at a joining portion of the yoke 100 and the bracket 101. 103, a contact chamber case made of a hard synthetic resin for the contact section 102; 104, a contact section 102;
Contact chamber cover made of rubber or soft synthetic resin,
Reference numeral 105 denotes an external plug provided on the ceiling of the contact chamber case 103 so as to penetrate into and out of the contact portion 102, reference numeral 106 denotes a fixed contact provided inside the contact portion 102 so as to be connected to the external plug 105, and 107 Is a movable contact disposed inside the contact portion 102.

[0003]

The conventional contact portion 10
2 indicates that the contact portion 102 has the yoke 100 and the bracket 1
01 is provided so as to penetrate the outer wall body into and out of the outer wall body. Therefore, when a battery harness (not shown) is fastened to the external plug 105, the tightening force is applied via the external plug 105. Contact room case 103 of contact portion 102
Or to the contact chamber cover 104. Then, in order to firmly connect the battery harness to the external plug 105, when the nut is fastened with a strong torque, the contact chamber case 103 and the contact chamber cover 104 are moved from the mating end face of the outer wall with the contact portion 102 to form the outer wall. There is a concern about insufficient strength such that it is damaged by shearing force due to a radially narrow surface.

[0004] In order to solve the above problems, the present invention provides:
It is an object of the present invention to provide a starter having high support strength of a contact portion with respect to an outer wall.

[0005]

According to the present invention, there is provided a starter having a contact portion to which a battery harness is connected is provided in an outer wall so as to penetrate inside and outside of the outer wall so as not to rotate the contact portion. A support portion for supporting is provided on the outer wall. Further, the starter according to the present invention is characterized in that the support portion protrudes outside the outer wall body. Further, the starter according to the present invention includes:
In a starter provided with a contact portion to which a battery harness is connected so as to penetrate the outer wall into and out of the outer wall,
A support portion for supporting the contact portion so as not to rotate is provided on a center plate housed in the internal space of the outer wall so as to protrude outward from the outer wall. Further, in a starter according to the present invention, in a starter provided with a contact portion to which a battery harness is connected so as to penetrate the outer wall into and out of the outer wall, a support portion supporting the contact portion so as not to rotate is provided on the outer wall. Is provided so as to protrude outside the outer wall from the brush holder base stored in the internal space. Further, in a starter according to the present invention, in a starter provided with a contact portion to which a battery harness is connected so as to penetrate the outer wall into and out of the outer wall, a support portion supporting the contact portion so as not to rotate is provided on the outer wall. A support portion provided to protrude outward from the outer wall and a support portion provided to protrude outside the outer wall from a center plate housed in the inner space of the outer wall.
It is characterized by being formed in a double wall structure. Further, in the starter according to the present invention, in a starter provided with a contact portion to which a battery harness is connected so as to penetrate the outer wall into and out of the outer wall, a support portion supporting the contact portion so as not to rotate is provided on the outer wall. And a support portion provided so as to protrude outward from the outer wall body and a support portion provided to protrude outside the outer wall body from a brush holder base housed in the internal space of the outer wall body. It is characterized by being formed. Further, the starter according to the present invention is characterized in that any one of the support portions is engaged with a contact portion.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 1 to 3 show a first embodiment of the present invention. FIG. 1 is an overall sectional view of a starter cut along an axial direction, FIG. 2 is a plan view around a contact portion, and FIG. It is the top view which rotated 90 degrees and decomposed | disassembled.

In FIG. 1, a starter is hermetically covered with a plurality of outer walls including a front bracket 1 made of metal, a center bracket 2 made of metal, a yoke 33 made of iron-based metal, and a rear bracket 3 made of metal. It has an almost bullet-shaped appearance. When the bolts 4 are fastened to the front bracket 1 from the rear bracket 3 via the yoke 33 and the center bracket 2, the plurality of outer walls are coaxially coupled. The portion of the front bracket 1 into which the ring gear 70 on the engine side enters is formed as an opening 5. Inside the starter, an output shaft 10, an electromagnetic switch 20, a DC motor 30 as an electric motor, a reduction mechanism 4
0, overrunning clutch 50, pinion gear 60
Are arranged. Since the electromagnetic switch 20, the overrunning clutch 50, and the pinion gear 60 are arranged coaxially with the output shaft 10, the starter of the first embodiment is called a coaxial starter. Electromagnetic switch 20
Includes a solenoid portion 21, a contact portion 22, and an interlocking mechanism 23. A yoke 33 is formed in a cylindrical shape with one end closed and the other end open, and the one end closed portion of the yoke 33 is
, The yoke 33 and the rear bracket 3 become a single body, and the number of parts is reduced. In the following description, the DC motor 30 side is referred to as the rear side, and the ring gear 7
The 0 side is called the front side.

As shown in FIGS. 2 and 3, the contact 2
2 is provided on the outer wall so as to penetrate inside and outside of the outer wall. The packing 25 seals between the mating surfaces of the contact portion 22 and the outer wall. In the contact portion 22, a contact chamber base 225 formed of an insulating material such as a synthetic resin and a contact chamber cover 226 formed of an insulating material are assembled with each other. It is formed in a shape. The contact portion 22 has an external plug 228. The external plug 228 includes a bolt 2281 and a nut 2282. The bolt 2281 penetrates a part of the contact chamber base 225 forming the outer peripheral wall of the contact chamber 227 so as not to rotate. The packing 24 seals between the mating surfaces of the bolt 2281 and the contact chamber base 225. A nut 2282 is fastened to a tip of the bolt 2281 projecting outside the contact chamber base 225. Then, a terminal 81 provided on a battery harness 80 connected to the positive electrode of the battery (not shown) is fitted into the bolt 2281 so as to be sandwiched between the nut 2282 and the contact base 225, and the nut 2282 is like a spanner (not shown). The battery harness is fastened to the bolt 2281 with a simple tool, and the battery harness is connected to the external plug 228.

In the first embodiment, since the contact portion 22 is provided in the center bracket 2 as the outer wall and the yoke 33 as the outer wall so as to penetrate inside and outside of the outer wall, as shown in FIG. A concave portion 301 is formed at an end of the yoke 33 that is aligned with the center bracket 2. A concave portion 201 is provided at the end of the center bracket 2 which is aligned with the yoke 33.
Are provided corresponding to the recesses 301. The concave portion 201 is surrounded by a supporting portion 202 made of a metal having a U-shape in a plan view and protruding outward from the center bracket 2 so as to be open rearward. The center bracket 2 is mounted so that the packing 25 is sandwiched between the contact portion 22 and the concave portion 301 and the contact portion 22 is housed in the concave portion 201 and the concave portion 301.
And the yoke 33 are coaxially aligned with each other to
By being fastened by (see FIG. 1), the outer peripheral surface of the contact portion 22 is held by the support portion 202 as shown in FIG. In FIG. 3, two protruding portions outward from the contact portion 22 are both ends of a motor-side fixed contact 221 described later that is taken into the internal space of the outer wall body.

Returning to FIG. 1, the output shaft 10 is a DC motor 30
It is arranged on the same straight line as the motor shaft 31 on the front side.
The front end of the output shaft 10 is rotatably supported by the front end of the front bracket 1 via a bearing 6. The rear end of the output shaft 10 is rotatably supported at the center of the internal gear 41 of the reduction mechanism 40 via the bearing 7. A recess 11 is formed on the rear end surface of the output shaft 10. A flange 12 projects radially outward from the outer peripheral surface of the output shaft 10 on the rear side of the bearing 7. Between the bearing 6 and the bearing 7, on the outer peripheral surface of the output shaft 10, a helical spline 13 having a spiral shape on the rear side and an annular groove 14 on the front side are formed.

The electromagnetic switch 20 includes a solenoid 21 and an interlocking mechanism 23 in addition to the contact 22. The solenoid 21 includes an exciting coil 211, a coil case 212, a core 213, a plunger 214, and a plunger spring 21.
5. Clutch pressing spring 216, clutch pressing member 21
7. A spring receiver 218 is provided. The excitation coil 211 formed in a cylindrical shape includes a cylindrical core 213 made of an iron-based metal disposed around the output shaft 10 and a cylindrical coil case 212 made of an iron-based metal attached to the core 213. It is stored in the enclosed internal space.

A cylindrical plunger 214 is disposed around the output shaft 10 between the core 213 and the internal gear 41. The plunger spring 215 has a coil shape surrounding the output shaft 10, is disposed between the core 213 and the plunger 214, and applies a spring force to the core 213 and the plunger 214 in a direction in which they are separated. And the core 21
3 is received by the front bracket 1 via the packing 219 so as not to go forward, the plunger 214 moves forward along the output shaft 10 while compressing the plunger spring 215 by the magnetomotive force of the exciting coil 211. I do. When the magnetomotive force of the exciting coil 211 is demagnetized, the plunger 214 moves rearward along the output shaft 10 due to the spring force of the plunger spring 215, and the internal gear 41
Hit.

A clutch pressing spring 216 is mounted inside the plunger 214. The clutch pressing spring 216 is
A coil-like member surrounding the output shaft 10 is disposed between a cylindrical clutch pressing member 217 surrounding the output shaft 10 and an annular spring receiver 218 surrounding the output shaft 10.
17 and the spring receiver 218 are given a spring force in the direction in which they are separated. When the clutch pressing member 217 is inserted into the plunger 214 from the rear side, the clutch pressing member 217
The protrusion protruding annularly outward from the rear outer peripheral surface of the clutch abuts against the protrusion protruding annularly inward from the front inner peripheral surface of the plunger 214, and the front side of the clutch pressing member 217 protrudes forward from the plunger 214. The spring receiver 218 is fixed inside the plunger 214. Even when the plunger 214 contacts the internal gear 41, the spring receiver 218 is provided on the plunger 214 so as not to interfere with the bearing 7 or the internal gear 41.

The contact portion 22 is formed of the contact chamber base 225 described above.
A motor-side fixed contact 221, a battery-side fixed contact 223, and a movable contact 224 are provided in addition to the contact chamber cover 226, the contact chamber 227, and the external plug 228. The motor-side fixed contact 221, the battery-side fixed contact 223, and the movable contact 224 are arranged in a contact chamber 227. The motor-side fixed contact 221 is fixed to the contact chamber base 225,
A brush wire extending from the brush 36 is connected to a portion of the motor-side fixed contact 221 protruding from the contact chamber cover 226 on both sides (front and back sides of the paper of FIG. 1). One end of the exciting coil 211 is connected to a portion of the motor-side fixed contact 221 located in the contact chamber 227. Battery side fixed contact 22
3 is a contact chamber base 2 forming an outer peripheral wall of the contact chamber 227.
25 and the contact chamber base 225 that forms the front wall of the contact chamber 227, and is bent so as to be disposed along the contact chamber base 225, and contacts the bolt 2281 of the external plug 228. The fixed contact 223 on the battery side and the fixed contact 221 on the electric motor side are separated from each other in the radial direction of the output shaft 10 and arranged along the contact chamber base 225. The movable contact 224 is
It has a plate-like shape that can be connected between the battery-side fixed contact 223 and the motor-side fixed contact 221, and is connected to the plunger 214 via the interlocking mechanism 23.

The plunger 214 is connected to the exciting coil 2
11 is moved forward by the magnetomotive force of the movable contact 224.
Is moved forward by the interlocking mechanism 23 and connected to the motor-side fixed contact 221 and the battery-side fixed contact 223. When the plunger 214 is moved rearward by the plunger spring 215, the movable contact 224 is separated from the motor-side fixed contact 221 and the battery-side fixed contact 223 by the interlocking mechanism 23. That is, when the plunger 214 moves forward or rearward, the movable contact 224 contacts or separates from the motor-side fixed contact 221 and the battery-side fixed contact 223, and the movable contact 224 moves from the motor-side fixed contact 221 to the battery-side fixed contact 223. On or off operation with respect to the electrical path between them.

The interlocking mechanism 23 includes a contact shaft 231, a shift plate 232, a retaining ring 233, a front compression spring 234, a rear compression spring 235, and spring supports 236; 237; 238. The contact shaft 231 includes a contact chamber base 225, a brush holder base 39, a center plate 46, and a packing 45.
And penetrates the internal gear 41 movably in the front-rear direction, and extends to the contact chamber 227 and the internal space of the center bracket 2. In the first embodiment, the contact shaft 231 is supported by the internal gear 41 so as to be movable in the front-rear direction.

The shift plate 232 includes the plunger 21.
4 and is fixed to the plunger 214 by the retaining ring 233. The front small diameter shaft portion 2311 of the contact shaft 231 projecting from the internal gear 41 into the inner space of the center bracket 2 penetrates through the shift plate 232 movably in the front-rear direction. A spring receiver 236 is fixed to a portion of the front small-diameter shaft portion 2311 protruding forward from the shift plate 232. The front-side pressing spring 234 has a coil shape surrounding the front-side small-diameter shaft portion 2311 and is disposed between the spring bracket 236 and a part of the front bracket 1 that forms a front wall of the inner space of the center bracket 2. The front-side pressing spring 234 applies a spring force toward the rear side to the contact shaft 231 via the spring receiver 236. The rear end of the contact shaft 231 is moved by the spring force of the front-side pressing spring 234 to the contact chamber cover 2.
Hits 26. Contact shaft 23 projecting into contact chamber 227
The movable contact 224 and the spring receiver 237 are fitted into the rear small shaft portion 2312 so as to be movable in the front-rear direction from the rear side. The rear small-diameter shaft portion 2312 on the rear side of the spring receiver 237
, A spring receiver 238 is fixed. Rear compression spring 235
Has a coil shape surrounding the rear small-diameter shaft portion 2312, and is disposed between the spring receiver 237 and the spring receiver 238. The rear pressing spring 235 applies a spring force toward the front side to the movable contact 224 via the spring receiver 237. And, the rear side compression spring 23
Due to the spring force of 5, the movable contact 224 abuts on the rear step 2313 of the contact shaft 231.

That is, the contact shaft 231 is
6, the movable contact 224 is off from the motor-side fixed contact 221 and the battery-side fixed contact 223 in a state where the movable contact 224 abuts against the rear step 2313. Then, the plunger 214 moves forward due to the magnetomotive force of the exciting coil 211, the clutch pressing member 217 pushes the overrunning clutch 50 forward, and the front end face of the pinion gear 60 is
The shift plate 232 contacts the rear end face of the contact shaft 2 while the clutch pressing spring 216 is being compressed.
31 is moved to the front side, and the movable contact 224 comes into contact with the fixed contact 223 on the battery side and the fixed contact 221 on the motor side to turn on. Also, the plunger 214 is the plunger spring 2
While moving to the rear side by the spring force of No. 15, the shift plate 232 moves away from the spring receiver 236 to the rear side, the contact shaft 231 moves to the rear side by the spring force of the front pressing spring 234, and the movable contact 224 moves to the motor side. The fixed contact 221 and the battery-side fixed contact 223 are further separated from each other and turned off.

The DC motor 30 includes a motor shaft 31, an armature 32, a yoke 33, a fixed magnetic pole 34, a commutator 35, a brush 36, a brush holder 37, a brush spring 38, and a brush holder base 39. The armature 32 has a form in which an armature coil is wound around an armature core fixed coaxially to the rear side of the motor shaft 31. The armature coil is connected to commutator 35. DC motor 30
There are two pole machines, four pole machines, and six pole machines depending on the number of fixed magnetic poles. For example, in the case of a six-pole DC motor, there are a total of six fixed magnetic poles 34, and all the fixed magnetic poles 34 are fixed to the inner peripheral surface of a yoke 33 formed in a cylindrical shape by iron. A plurality of fixed magnetic poles 3 adjacent in the circumferential direction of the yoke 33
In 4, the N pole of one fixed magnetic pole 34 and the S pole of another fixed magnetic pole 34 are alternately arranged. Motor shaft 31
Is rotatably fitted to the recess 11 of the output shaft 10 via the bearing 8 through the inside of the cylindrical commutator 35. A brush 36 and a brush spring 38 are stored in a brush holder 37 disposed around the commutator 35. The brush spring 38 connects the brush 36 to the commutator 3.
Press on 5. The brush holder base 39 has an annular shape formed of a metal plate surrounding the commutator 35, is fixed to the front side surface of the brush holder 37, and supports the brush holder 37 and the contact chamber base 225.

The reduction mechanism 40 includes an internal gear 41,
A sun gear 42, a plurality of planetary gears 43, a planetary gear shaft 44,
A packing 45 and a center plate 46 are provided. The outer peripheral portion of the internal gear 41 is fitted into the center bracket 2 from the rear side, so that the internal gear 41 is fixed to the center bracket 2. Sun gear 42
Is provided on the outer peripheral surface of the motor shaft 31 so as to be able to rotate integrally with the motor shaft 31. The plurality of planet gears 43 are arranged between the sun gear 42 and the internal gear 41 so as to mesh with the sun gear 42 and the internal gear 41. These planetary gears 43 are individually rotatably supported on the flange 12 of the output shaft 10 by a planetary gear shaft 44. Therefore, when the electric motor shaft 31 rotates, the planetary gear 43
While rotating around the sun gear 4, it revolves around the sun gear 42, and the rotation speed of the motor shaft 31 is reduced and transmitted to the output shaft 10 via the planetary gear shaft 44.

The center plate 46 is formed of a metal plate surrounding the output shaft 10 and is superimposed on the rear opening end face of the internal gear 41 via a packing 45 to form a rear opening of the internal gear 41. Cover. The brush holder base 39 is superimposed on the rear side of the center plate 46, and the outer peripheral portion of the center plate 46 and the outer peripheral portion of the brush holder base 39 are connected to the center bracket 2 and the yoke 33.
The center plate 46 and the brush holder base 39 separate the inner space of the center bracket 2 from the inner space of the yoke 33.

The overrunning clutch 50 includes a clutch outer 51, a clutch inner 52, a plurality of clutch rollers 53, a clutch washer 54, and a clutch cover 55.
And a bearing 56. The clutch outer 51 is a helical spline 13 of the output shaft 10.
, And a roller cam that forms a wedge-shaped space when assembled with the clutch inner 52. The clutch inner 52 has a cylindrical shape rotatably mounted on the output shaft 10 on the front side of the helical spline 13 via a bearing 56. Each of the clutch rollers 53 is housed in an internal space formed by assembling the clutch outer 51 and the clutch inner 52. The clutch washer 54 is disposed over the front end surface of the clutch outer 51 and the outer peripheral surface of the clutch inner 52 so as to cover the internal space in which the clutch roller 53 is stored. The clutch cover 55 holds the clutch outer 51 and the clutch washer 54.

The pinion gear 60 is provided on the outer peripheral surface of the clutch inner 52 so as to be able to rotate integrally with the clutch inner 52. The output shaft 10 protruding forward from the pinion gear 60 has an annular front spring support 61 and an annular rear spring support 6.
2 are rotatably mounted. The inner peripheral portion of the front spring support 61 is received by the retaining ring 63 mounted in the annular groove 14 of the output shaft 10 so as not to move forward of the retaining ring 63.
An output shaft 10 is provided between the front spring support 61 and the rear spring support 62.
A coil-shaped pinion spring 64 is arranged to surround the pinion spring. The front end of the pinion spring 64 is fitted on the outer peripheral surface of the front spring receiver 61. The front end of the pinion spring 64 abuts on an annular convex portion that protrudes outward from the front end of the front spring receiver 61. The rear end of the pinion spring 64 is fitted on the outer peripheral surface of the rear spring receiver 62. The rear end of the pinion spring 64 is connected to a rear spring support 62.
Abuts on an annular projection protruding outward from the rear end. The pinion spring 64 gives the rear spring support 62 a spring force that moves rearward in parallel with the axial direction of the main force shaft 10. Pinion spring 6
4, the rear spring support 62 is connected to the clutch inner 5
The overrunning clutch 50 and the pinion gear 60 are moved rearward while abutting against the front end face of the second and the front end face of the bearing 56. A gap is formed between the inner peripheral surface of the pinion spring 64 and the outer peripheral surface of the output shaft 10.

An ignition switch-side terminal of a contact portion (not shown) is connected to an intermediate portion of the exciting coil 211 having one end connected to the motor-side fixed contact 221. The contact portion having the ignition switch side terminal is provided separately from the contact portion 22 so as to be insulated from the center bracket 2 or the yoke 33 so as to penetrate inside and outside. The excitation coil 21
The other end of 1 is connected to the coil case 212.

In a state where the positive electrode of the battery is wired to an ignition switch side terminal via an ignition switch (not shown) outside the center bracket 2 or the yoke 33 and the battery harness 80 is connected to the external plug 228, When the ignition switch is turned on, the plunger 214 moves toward the core 213 (front side) due to the magnetomotive force of the exciting coil 211, and the clutch pressing member 217 pushes the overrunning clutch 50 forward, and the overrunning clutch 5
0 is guided by the helical spline 13 and moves forward while rotating in one direction, and when the front end face of the pinion gear 60 contacts the rear end face of the ring gear 70, the pinion gear 6
Although the movement of 0 toward the front side is temporarily stopped, the clutch pressing spring 216 contracts, and the plunger 214 continues to move.
In addition, the movable contact 224 moves forward via the interlocking mechanism 23 by the forward movement of the plunger 214 due to the magnetomotive force of the exciting coil 211, and the movable contact 224 moves to the motor-side fixed contact 221 and the battery-side fixed contact 223. And the DC motor 30 is driven.

In this state, the driving force of the DC motor 30 is transmitted from the speed reduction mechanism 40 to the overrunning clutch 50 via the output shaft 10. Then, when the clutch outer 51 rotates through the helical spline 13 and the clutch roller 53 is rotated by the rotation of the clutch outer 51, the clutch roller 53 is rotated by the spring force of a spring (not shown) to form a groove (not shown) of the clutch outer 51. It moves to a narrow space, and the clutch outer 51 and the clutch inner 52
And the clutch roller 53 are engaged. As a result, the pinion gear 60 is connected to the output shaft 10 and rotates in one direction. When the tooth ridges and valleys of the pinion gear 60 match the tooth ridges and valleys of the ring gear 70, the clutch pressing spring that has been contracted up to that point. 216, the pinion gear 6
0 meshes with the ring gear 70 to rotate the ring gear 70, and the engine starts.

When the engine starts, the rotation of the ring gear 70 increases, and the pinion gear 60 is rotated by the rotation of the ring gear 70, the clutch roller 53 moves to the above-mentioned not-shown wide space of the groove, and the clutch outer 51 The engagement between the clutch inner 52 and the clutch roller 53 is released. Thereby, the connection between the pinion gear 60 and the output shaft 10 is released. In this state, when the ignition switch is turned off, the magnetomotive force of the exciting coil 211 decreases, and the pressing force of the plunger 214 on the overrunning clutch 50 decreases, the pinion gear 60 moves rearward due to the spring force of the pinion spring 64. Then, the engagement between the pinion gear 60 and the ring gear 70 is released, and the pinion gear 60 is separated from the rotation of the engine.

In the structure of the first embodiment, as shown in FIG. 2, the external plug 228 is connected to the center bracket 2 and the yoke 33.
Contact part 22 supported while insulating against the outer wall such as
Is a U-shaped support portion 2 provided on the center bracket 2.
Held at 02. That is, both opposing side walls 2021; 2022 of the support portion 202 come into contact with both outer surfaces of the contact portion 22, and both side walls 2021;
2 are in contact with the front side surface of the contact portion 22, and these both side walls 2021; 2022 and the rear wall 20
23 hold the contact portion 22. Therefore, when fastening the battery harness 80 to the contact portion 22, the nut 228
A surface wide in the radial direction of the center bracket 2 so that the support portion 202 does not rotate the contact portion 22 from outside even if a tightening force from a fastening tool such as a spanner (not shown) for fastening the contact portion 2 is applied to the contact portion 22. And the contact portion 22 has an end surface of the concave portion 201 of the center bracket 2 and a concave portion 301 of the yoke 33.
No shear force is applied from the end surface of the center bracket 2 in the radial direction of the center bracket 2 or the surface narrow in the radial direction of the yoke 33, and the inconvenience such that the contact portion 22 is damaged can be prevented.

Since the support portion 202 protrudes outside the center bracket 2, the starter can be made more compact than when the support portion corresponding to the support portion 202 protrudes inside the center bracket 2. That is, if the support portion protrudes inside the center bracket 2, a space for disposing the support portion 202 between the contact portion 22 and the brush holder base 39 is required, and the axial length of the starter is increased. On the other hand, when the support portion 202 protrudes outside the center bracket 2 as in the first embodiment, the contact portion 22
A space for disposing the support portion 202 between the brush holder base 39 and the brush holder base 39 is unnecessary, and the axial length of the starter can be the same as the case where the support portion 202 is not provided, and the starter can be made compact. Further, when the support portion 202 protrudes outside the center bracket 2 as in the first embodiment, the support portion 202 can be increased in thickness to increase the support strength.

Embodiment 2 FIG. FIG. 4 is a plan view showing Embodiment 2 of the present invention. In FIG. 4, the center bracket 2 has a concave portion 203 corresponding to the concave portion 201 and a concave portion 20.
3 and a front wall portion 204 protruding outward in a plate shape from the front edge. A support portion 461 made of a metal having a U-shape in plan view and corresponding to the support portion 202 is provided on the center plate 46 of FIG. Opposing side wall portions 46 of the support portion 461
11; between the rear wall 4613 connecting the 4612 and the contact chamber base 225 of the contact part 22, a wall 391 made of a flat metal in a plan view and protruding outward from the brush holder base 39 of FIG. .

The packing 25 is sandwiched between the contact portion 22 and the concave portion 301, the wall portion 391 is sandwiched between the contact portion 22 and the support portion 461, and the support portion 461 is interposed between the contact portion 22 and the concave portion 203. The center bracket 2 and the yoke 33 are coaxially aligned with each other by the bolts 4 of FIG. 1 so that the contact portions 22 and the support portions 461 are housed in the concave portions 203 and 301, respectively. By being fastened, the outer peripheral surface of the contact portion 22 is held by the support portion 461. The front wall 204 contacts the rear wall 4613 of the support 461.

According to the structure of the second embodiment, the contact portion 22
Are supported by a support portion 461 provided on the center plate 46 so as not to rotate. That is, both side walls 4611 and 4612 of the support portion 461 contact both outer side surfaces of the contact portion 22, and a rear wall portion 4613 of the support portion 461 contacts the front side surface of the contact portion 22, and these both side wall portions 4611; 4612
And the rear wall portion 4613 hold the contact portion 22. Therefore, when the battery harness 80 of FIG. 1 is connected to the external plug 228, even if a tightening force is applied to the contact portion 22 by a tool such as a spanner (not shown) for fastening the nut 2282, the support portion 461 is not connected to the contact portion 22. The portion 22 is supported so as not to rotate from the outside, and the inconvenience such that the contact portion 22 is damaged can be prevented. The rear wall 4613 of the support portion 461 is connected to the front wall 204 of the center bracket 2 and the brush holder base 3.
9 is sandwiched by the wall portion 391 of FIG.
Compared to the case where the rotation of the contact portion 22 is prevented by only 61,
The rotation inhibiting force of the support portion 461 to the contact portion 22 increases.

Since the support portion 461 protrudes outside the center bracket 2 and the yoke 33, the motor-side fixed contact 2 protrudes from the contact portion 22 on both circumferential sides of the contact portion 22.
Since it is not necessary to avoid both end portions of the outer wall 21, the support portion 461 can be formed wide without being constricted in the radial direction of the outer wall,
The support strength of the support portion 461 with respect to the contact portion 22 can be ensured.

Embodiment 3 FIG. 5 is a plan view showing the third embodiment of the present invention. Referring to FIG.
1 is provided on the brush holder base 39 of FIG. 1, and a wall portion 462 corresponding to the wall portion 391 is provided.
Are provided on the center plate 46 of FIG. 1 so as to protrude outward from the center bracket 2 and the yoke 33. Then, the packing 25 is sandwiched between the concave portion 301 and the contact portion 22, the contact portion 22 and the support portion 392 are fitted together, and the wall portion 462 is sandwiched between the support portion 392 and the front wall side 204. The center bracket 2 and the yoke 33 are coaxially aligned with each other and fastened with the bolts 4 of FIG. 1 so that the contact portions 22 and the support portions 392 are housed in the recesses 203 and 301. , Contact part 22
Is held by the support portion 361. In addition, the support 3
The rear wall 39 connecting the two side walls 3921;
23 is in contact with the wall portion 462, and the wall portion 462 is in contact with the front wall portion 2.
04 contacts.

According to the structure of the third embodiment, the support 39
2 are in contact with both outer side surfaces of the contact portion 22, and the rear wall portion 3923 of the support portion 392 is in contact with the contact portion 2.
2 in contact with the front side of these two side walls 3921;
22 and the rear wall portion 3923 hold the contact portion 22.
Therefore, the battery harness 80 of FIG.
When the connection portion is connected to the contact portion 22, the support portion 392 supports the contact portion 22 so as not to rotate from the outside even if a tightening force is applied to the contact portion 22 by a tool such as a spanner (not shown) for fastening the nut 2282. The inconvenience that the part 22 is damaged can be prevented. The rear wall 3923 of the support portion 392 is connected to the front wall 204 of the center bracket 2 and the center plate 4.
6 is supported by the wall portion 462 of FIG.
As compared to the case where the rotation of the contact portion 22 is simply prevented, the rotation inhibiting force of the support portion 392 to the contact portion 22 is increased.

Since the support portion 392 protrudes outward from the center bracket 2 and the yoke 33, the motor-side fixed contact 2 protrudes from the contact portion 22 on both circumferential sides.
Since it is not necessary to avoid both end portions of the outer wall 21, the support portion 392 can be formed wide without a portion constricted in the radial direction of the outer wall body,
The support strength of the support portion 392 with respect to the contact portion 22 can be ensured.

Embodiment 4 FIG. FIG. 6 is a plan view showing Embodiment 4 of the present invention. In FIG. 6, the contact portion 22 is formed between the support portion 202 of the center bracket 2 and the center plate 46.
1 (see FIG. 1), and is supported so as not to rotate by a double-walled structure including the support portion 461.
2: The rotation preventing force of 461 against the contact portion 22 is further increased.

Embodiment 5 FIG. 7 is a plan view showing Embodiment 5 of the present invention. In FIG. 7, the contact portion 22 is supported so as not to rotate by a double wall structure including the support portion 202 of the center bracket 2 and the support portion 392 of the brush holder base 39 (see FIG. 1). 461; the force of preventing rotation of the contact portion 22 from the contact portion 22 is further increased.

Embodiment 6 FIG. 8 and 9 show Embodiment 6 of the present invention. FIG. 8 is a perspective view of a part of a contact chamber cover and a part of a center plate, and FIG. 9 is a plan view around a contact part. In FIG. 8, the contact chamber cover 226 is provided with the yoke 33 of FIG.
The receiving portion 22 is provided on the outer surface of each of the portions protruding outward.
63; 2264 and protrusions 2265; 2266. The receiving portion 2263 is a groove portion 2263 facing vertically.
1; 22632, and the receiving portion 2264 is formed by grooves 26441; Each groove 22263; 22632; 22641; 2
2642 is formed in the blind alley which stopped at the front side. Each of the protruding portions 2265; 2266 is disposed between the groove portions 22631;
Each of the projections 2265; 2266 includes a sloped portion 22651; 22661 whose projection dimension increases from both side walls 2261; 2262 as going from the rear side to the front side, and both side wall portions 2
261, a front portion 226 protruding substantially at a right angle from 2262;
52; 22662. Engagement holes 46111; 46121 are individually formed at the distal ends of both side walls 4611; 4612 of the support 461 of the center plate 46. Reference numeral 463 denotes a through hole for inserting the contact shaft 231 of FIG.

Then, the side wall portion 46 of the support portion 461 is formed.
11 are inserted into upper and lower grooves 22263; 22632 of the receiving portion 2263 of the contact chamber cover 226,
The side wall portion 4612 in 61 is the upper and lower groove portions 26441 and 2264 of the receiving portion 2264 in the contact chamber cover 226.
9, the protrusion 2265 and the engagement hole 46111 are fitted, and the protrusion 2266 and the engagement hole 46121 are fitted as shown in FIG.

In FIG. 9, even when a tightening force X by a tool such as a wrench (not shown) for fastening the nut 2282 is applied to the contact portion 22, both side walls 4611 and 4612 are outwardly received by the receiving portions 2263 and 2264. Since the contact portion 22 is supported so as not to spread, the support portion 461 supports the contact portion 22 so as not to rotate from the outside, and it is possible to prevent the disadvantage that the contact portion 22 is damaged. Also, receiving portions 2263; 226
Since 4 is formed in the dead end, even if the protrusion 2265 pushes the side wall 4611 forward by the fastening force X, the receiving portion 2263 prevents the side wall 4611 from moving forward. When the fastening force X is in the direction opposite to the arrow, the receiving portion 2264 prevents the side wall portion 4612 from moving forward even if the protrusion 2266 pushes the side wall portion 4621 forward due to the opposite direction of the fastening force. Therefore, if the receiving portions 2263; 2264 are formed in the blind alley, the pressing ability of the receiving portions 2263; 2264 against the side wall portions 4611; 4612 increases.

Embodiment 7 FIG. 10 is a plan view showing Embodiment 7 of the present invention. 10, an engaging portion 39211 corresponding to the engaging portions 46111; 46121;
39221 are individually formed at the end portions of both side walls 3921 and 3922 of the support portion 392 of the brush holder base 39, and a tightening force X by a tool such as a spanner (not shown) for fastening the nut 2282 is applied to the contact portion 22. However, both side wall portions 3921; 3922 are receiving portions 2263;
H.264, so as not to spread outward,
2 supports the contact portion 22 so as not to rotate from the outside, and it is possible to prevent the disadvantage that the contact portion 22 is damaged. In addition, the protrusion 2265 is moved by the fastening force X to the side wall 461.
1 is pushed forward, the receiving portion 226 formed in the dead end
3 prevents the side wall 3921 from moving forward. When the fastening force X is in the opposite direction, the receiving portion 2264 formed in the dead end prevents the side wall portion 3922 from moving forward even if the protrusion 2266 pushes the side wall portion 3922 forward by the opposite fastening force. I do. Therefore, the pressing ability of the receiving portions 2263; 2264 against the side wall portions 3921; 3922 increases.

Embodiment 8 FIG. FIG. 11 is a right side view showing the eighth embodiment of the present invention. In FIG. 11, the yoke 3
3 are provided with support parts 331 and 332 which face each other in the circumferential direction. The support portions 331 and 332 are formed to be bent outward from both circumferential side edges of the concave portion 301 (see FIG. 3).
Then, the contact portion 22 is connected to the yoke 33 and the center bracket 2.
(See FIG. 3) when the support portion 331;
32 holds the contact portion 22 from both sides in the circumferential direction via the packing 25, so that the support portions 331 and 332 support the contact portion 22 so as not to rotate from the outside, and the contact portion 22 is damaged. Can be prevented. Symbol 251; 2
52 is an extension provided on the rear side of the packing 25.

In the eighth embodiment, the support portions 331 and 332 protrude outside the yoke 33, but they may be provided so as to protrude inside the yoke 33. That is, since there is usually a gap between the contact portion 11 of the yoke 33 and the brush 36 in the circumferential direction, if the support portion 331; , It is not necessary to increase the diameter of the yoke 33, and the support portions 331;
Since it is not necessary to increase the size between the brush holder base 32 and the brush holder base 39, the starter can be made compact as in the first to seventh embodiments.

2 to 11, the illustration of the battery harness 80 and the terminal 81 of FIG. 1 is omitted.

In each embodiment, the support structure of the contact portion 22 on one end side of the exciting coil 211 with the outer wall is illustrated. However, the contact structure of the exciting coil 211 with the outer wall of the contact portion having an ignition switch side terminal (not shown) is illustrated. It can also be applied to support structures.

[0047]

As described above, according to the present invention, the support portion protruding outward from the outer wall, the support provided on the outer wall, the support provided on the center plate, or the brush holder base is provided. The supporting portion supports the contact portion for connecting the battery harness so as not to rotate, so that when the battery harness is fastened to the contact portion, even if a fastening force is applied to the contact portion, the supporting portion holds the contact portion to the outer wall body. It is supported by a large surface in the radial direction, and the contact point does not receive the shearing force due to the radially narrow surface of the outer wall from the mating end face with the contact part of the outer wall, preventing inconvenience such as damage to the contact part it can. Further, if the support portion provided on the outer wall projects outside the outer wall, a specific space for disposing the support portion inside the contact portion and the outer wall becomes unnecessary, and the starter can be made compact. Also, if the support portion protrudes outside the outer wall,
The support strength can be increased by increasing the thickness of the support portion. Further, in the present invention, the support portion has a double wall structure of the support portion provided on the center plate housed in the internal space of the outer wall and the support portion provided on the outer wall, or the support portion has the outer wall. If formed in a double wall structure of the support portion provided on the brush holder base housed in the internal space and the support portion provided on the outer wall, the rotation preventing force of the support portion to the contact portion becomes higher. . Further, in the present invention, when the support portion is engaged with the contact portion, the support portion can be supported so as not to spread outward.

[Brief description of the drawings]

FIG. 1 is an axial sectional view showing a starter according to a first embodiment of the present invention.

FIG. 2 is a plan view showing the vicinity of a contact portion according to the first embodiment.

FIG. 3 is an exploded plan view showing the vicinity of a contact portion according to the first embodiment.

FIG. 4 is a plan view showing around a contact portion according to a second embodiment of the present invention.

FIG. 5 is a plan view showing around a contact portion according to a third embodiment of the present invention.

FIG. 6 is a plan view showing the vicinity of a contact portion according to a fourth embodiment of the present invention.

FIG. 7 is a plan view showing the vicinity of a contact portion according to a fifth embodiment of the present invention.

FIG. 8 is an exploded perspective view showing a part of a contact chamber cover and a part of a brush holder according to a sixth embodiment of the present invention.

FIG. 9 is a partially broken plan view showing the vicinity of a contact portion according to the sixth embodiment.

FIG. 10 is a partially broken plan view showing around a contact portion according to a seventh embodiment of the present invention.

FIG. 11 is a left side view showing the vicinity of a contact portion according to an eighth embodiment of the present invention.

FIG. 12 is a cross-sectional view showing the vicinity of a contact portion of a conventional starter.

[Explanation of symbols]

1 front bracket (outer wall), 2 center bracket (outer wall), 3 rear bracket (outer wall), 33
Yoke (outer wall), 22 contact parts, 225 contact base, 226 contact room cover, 228 external plug, 20
2: 331; 332; 392; 461 Supporting part, 226
3, 2264 receiving portion, 2265; 2266 projecting portion,
39211; 39221; 46111; 46121 engagement holes.

Continued on the front page (72) Inventor Akira Kuragaki 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsui Electric Co., Ltd. (72) Motoi Hisamoto 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Co., Ltd. Inside the company (72) Inventor Takehiro Kobayashi 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Corporation (72) Inventor Hidekazu Katayama 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Corporation F term (reference) 5H605 AA02 BB05 CC01 CC02 CC03 CC06 CC10 EC04 EC08 GG06

Claims (7)

[Claims] 1. A starter in which a contact portion for connecting a battery harness penetrates into and out of an outer wall body has a support portion provided on the outer wall body for supporting the contact portion so as not to rotate. A starter characterized by: 2. The starter according to claim 1, wherein the support portion protrudes outward from the outer wall. 3. A starter provided with a contact portion for connecting a battery harness to an outer wall so as to penetrate inside and outside of the outer wall. A support portion for supporting the contact portion so as not to rotate is housed in an inner space of the outer wall. A starter provided so as to protrude outward from an outer wall body on a center plate provided. 4. A starter in which a contact portion for connecting a battery harness penetrates an outer wall body so as to penetrate inside and outside of the outer wall body, a support portion for supporting the contact portion so as not to rotate is housed in an inner space of the outer wall body. A brush holder base provided so as to protrude outward from the outer wall body. 5. A starter provided with a battery harness connection contact portion penetrating the outer wall into and out of the outer wall, a support portion for supporting the contact portion so as not to rotate is provided on the outer wall outside the outer wall. And a center wall accommodated in the inner space of the outer wall and a support provided to protrude outward from the outer wall. And starter. 6. A starter provided with a contact portion for connecting a battery harness to an outer wall so as to penetrate inside and outside of the outer wall, a supporting portion for supporting the contact portion so as not to rotate is provided on the outer wall outside the outer wall. And a brush holder base housed in the inner space of the outer wall body and a support part provided to protrude outward from the outer wall body. Starter that features. 7. The starter according to claim 1, wherein the support portion is engaged with the contact portion.