JPH1030531A - Starter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a feeder line to be connected with a battery terminal from coming into contact with the outer peripheral surface of a machine frame body. SOLUTION: A battery terminal 3 mounted on a brush holder 9 is connected with a feeder line 25 supplying power from a battery to a starter. Because the feeding line 25 is held by a feeding line holding member 28, the take-out direction for the starter is regulated and a fixed distance h is maintained between the feeding line 25 and the outer peripheral surface of a machine frame body. The feeding line holding member 28 is formed by an insulated material, and a fitting part 28d formed into a roughly conical shape is inserted into the inside of the machine frame body from a round hole 10a formed on the wall surface of a rear case 10 and is mounted. On the outer peripheral surface of the rear case 10, a groove 10b which is slightly wider than the width of a pedestal part 28b of the feeding line holding member 28 is formed. The rear case 10 is regulated for the revolution by fitting both the sides of the pedestal part 28b into the groove 10b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a starter for starting an engine.

[0002]

2. Description of the Related Art In recent years, due to the increase in accessories and the like associated with higher performance and higher functionality of vehicles, the inside of an engine room has become more and more dense, and there has been a strong demand for improved mountability of a starter. Therefore, for example, in JP-A-1-208564 and JP-A-1-238445, as shown in FIG. 6, the electromagnetic switch 110 is composed of a front case 120, a center case 130, a yoke 140, a brush holder 150, a rear case 160, and the like. There is proposed a starter 100 housed in a substantially cylindrical machine frame body composed of: This starter 100 was able to obtain a great effect in terms of mountability as compared with a conventional starter in which the electromagnetic switch 110 protruded greatly to the outer periphery of the yoke 140.

[0003]

However, the starter 100 in which the above-described electromagnetic switch 110 is housed in a substantially cylindrical machine frame has a power supply line 170 from a battery due to its structure.
The position of the battery terminal 180 to which the
It must be provided at a certain distance L from the rear end face of the zero. For this reason, the power supply line 170 may come into contact with a part of the machine frame body (in FIG. 6, it is in contact with the rear case 160) due to the mounting direction and the weight of the power supply line 170. In particular, when the battery terminal 180 is located in front of the starter 100 as proposed in JP-A-1-208564, the tendency is even stronger. When the power supply line 170 comes into contact with the machine frame as described above, there is a risk that the coating of the power supply line 170 may be damaged due to vibration of the starter 100, heat generation of the starter 100, and the like, causing a short circuit. Further, when the power supply line 170 is in contact with the yoke 140 which is a part of the machine frame, a magnetic field generated when a current flows through the power supply line 170 causes the electric motor 1 serving as a power source of the starter 100 to rotate.
90 has a negative effect on the performance.

Therefore, in order to prevent contact between the power supply line 170 and the machine frame, a certain measure can be taken if the height h at which the power supply line 170 is connected from the surface of the machine frame is increased. The effect of storing the switch 110 in the substantially cylindrical body of the frame (improvement of mountability) is reduced by half. Feeding line 1
Even if it is attempted to take measures in the direction in which the battery 70 is taken out (rotational angle around the battery terminal 180), the connection method between the power supply line 170 and the battery terminal 180 is such that the terminal 171 of the power supply line 170 is fitted into the male screw portion 181 of the battery terminal 180. After the connection, the nut 200 is tightened and connected to the male screw portion 181. Therefore, when the nut 200 is tightened, the feed line 170 rotates due to friction between the nut 200 and the terminal 171. 17
The take-out direction of 0 cannot be fixed. Therefore, feeder line 1
It was not possible to reliably take countermeasures depending on the direction in which 70 was taken out. The present invention has been made based on the above circumstances, and an object of the present invention is to prevent a power supply line connected to a battery terminal from contacting an outer peripheral surface of a machine frame.

[0005]

According to the first aspect of the present invention, the direction of taking out the power supply line with respect to the machine frame can be regulated by the power supply line holding member provided on the machine frame. This prevents the power supply line from coming into contact with the outer peripheral surface of the machine frame, thereby preventing the coating of the power supply line from being damaged.

According to the second aspect of the present invention, the power supply line can be held at an interval between the outer peripheral surface of the machine frame and the power supply line by the power supply line holding member provided on the machine frame. .
This prevents the power supply line from coming into contact with the outer peripheral surface of the machine frame, thereby preventing the coating of the power supply line from being damaged.

According to the third aspect of the present invention, the feed line holding member provided on the machine frame regulates the direction in which the feed line is taken out of the machine frame, and the gap between the outer peripheral surface of the machine frame and the feed line is maintained. The power supply line can be held with an interval therebetween. This can more reliably prevent the power supply line from coming into contact with the outer peripheral surface of the machine frame, thereby preventing damage to the coating of the power supply line.

According to the fourth aspect of the present invention, the power supply line holding member is formed of an insulating material or a low magnetic permeability material, so that a magnetic field generated when a current flows through the power supply line adversely affects the motor performance. Can be prevented.

According to the fifth aspect, the power supply line holding member is formed integrally with the insulating terminal holding member that holds the battery terminal at a part of the machine frame, thereby increasing the number of components. Therefore, contact between the power supply line and the machine frame can be prevented.

According to the sixth aspect of the present invention, since the power supply line holding member is formed integrally with the machine frame, contact between the power supply line and the machine frame can be prevented without increasing the number of components.

According to the means of claim 7, the power supply line holding member is provided at a plurality of locations of the machine frame, so that the power supply line is extended long along the outer peripheral surface of the machine frame. For example, even when the battery terminal is provided on the front side of the starter), it is possible to reliably prevent the power supply line from contacting the outer peripheral surface of the machine frame.

[0012]

Next, a starter according to the present invention will be described with reference to the drawings. (First Embodiment) FIG. 1 is a sectional view of a starter. A starter 1 according to the present embodiment is provided with a starting motor 2 for generating a rotating force, and is disposed axially forward (left side in FIG. 1) of the starting motor 2 so that the rotating force of the starting motor 2 is applied to an engine ring gear (not shown). Power transmission mechanism (to be described later) for transmitting power to a battery terminal 3 and a switch terminal 4 for connection to external wiring
(See FIG. 4), disposed rearward in the axial direction of the starting motor 2,
An electromagnetic switch 5 for opening and closing a motor contact (described later) interposed in an energizing circuit M (see FIG. 4) of the starter motor 2, and a frame (a front case 6, a center case, a center case) of the starter 1 having a substantially cylindrical outer shape. 7, yoke 8, brush holder 9,
And a rear case 10).

In the starting motor 2, a fixed magnetic pole 11 (for example, a permanent magnet) is fixed to an inner peripheral surface of a yoke 8, which also serves as a machine frame and a magnetic frame, and an armature 12 is rotatable around the inner periphery of the fixed magnetic pole 11. And a brush 14 is disposed on a commutator 13 provided at an end of the armature 12. The armature 12 includes a hollow rotating shaft 17 rotatably supported via bearings 15 and 16, an armature core 18 fixed to the outer periphery of the rotating shaft 17, and a commutator 13 held by the armature core 18. It has a plurality of armature conductors 19 that are mechanically coupled. The brush 14 is held by a brush holder 9 made of an insulating material, and is urged by a spring 20 to the outer peripheral surface of the commutator 13. The brush holder 9 is sandwiched between a yoke 8 and a rear case 10 that partially covers the outer periphery of the electromagnetic switch 5.

The power transmission mechanism is inserted into a hollow portion of the rotary shaft 17 and is supported by the output shaft 21 slidably in the axial direction with respect to the rotary shaft 17, and a reduction gear (for reducing the rotation of the armature 12). A one-way clutch (not shown) for transmitting the rotation output of the reduction gear to the output shaft 21;
The output shaft 21 includes a pinion gear 22 and the like, which is fitted to the outer periphery of the distal end of the output shaft 21 and meshes with the ring gear to transmit the rotation of the output shaft 21 to the ring gear, and is covered by the front case 6 and the center case 7.

The battery terminal 3 protrudes radially outward from the outer peripheral surface of the brush holder 9 and is fixed to the brush holder 9 by tightening a nut 23 to a screw portion 3a formed on the outer periphery. The battery terminal 3 has a power supply line 25 for supplying power from the battery 24 (see FIG. 4) to the starter 1.
(External wiring) is connected. The power supply line 25 is connected to a terminal 26 provided at the tip of the screw portion 3 of the battery terminal 3.
a from the terminal 26 and the nut 2
7 to the screw portion 3a, the battery terminal 3
Connected to. The feeder line 25 is held by a feeder line holding member 28 (described later) attached to the rear case 10, so that the feedout direction with respect to the starter 1 is restricted and the machine frame (the rear case 1 in the present embodiment).
A certain distance is kept between the outer peripheral surface of the lens (0). The switch terminal 4 is made of a conductive plate-like member, and is insert-formed on the outer periphery of the rear case 10. The switch terminal 4 is connected to the key switch 2 from the battery 24.
The wiring 30 via 9 is connected. The switch terminal 4 is connected to the suction coil 3 of the electromagnetic switch 5 inside the machine frame.
1 and is electrically connected.

The electromagnetic switch 5 includes the above-described suction coil 3
1. A magnetic frame 32 that covers the outer periphery of the attraction coil 31 and forms a part of a magnetic circuit, and a non-magnetic metal sleeve fixed to the inner periphery of the hollow portion of the winding frame around which the attraction coil 31 is wound 33, a plunger 34 (which forms a magnetic circuit together with the frame 32) movably disposed in the inner periphery of the sleeve 33 in the axial direction, a transmission means (described later) for transmitting the movement of the plunger 34 to the output shaft 21; And a pair of fixed contacts 35, 36 forming the aforementioned motor contacts.
(See FIG. 4) and the movable contact 37.

The transmission means includes a cylindrical member 38 fixed to the center of the plunger 34 and a bottom 38 of the cylindrical member 38.
It comprises a rod 39 inserted in a through-hole passing through a, and a spring 40 for urging the rod 39. The cylindrical member 38 is arranged coaxially with the rotation shaft 17 of the armature 12, one end having a bottom 38 a is inserted into the hollow inside of the rotation shaft 17, and moves axially integrally with the plunger 34. The rod 39 has a large diameter portion 39a having a larger diameter than the through hole of the cylindrical member 38 at a rear end disposed inside the cylindrical member 38. The projection 38 protrudes from the bottom 38 a of the rotation shaft 17 into the hollow interior of the rotation shaft 17, and the tip is inserted into a recess 21 a formed at the rear end of the output shaft 21. The spring 40 is disposed in the hollow portion of the cylindrical member 38 and presses the large diameter portion of the rod 39 toward the bottom 38a of the cylindrical member 38. When the plunger 34 moves in the sleeve 33 by receiving the magnetic force of the attraction coil 31 (moves to the left in FIG. 1), the cylindrical member 38 moves integrally with the plunger 34 and the rod 39 moves forward. It is pushed out to. This allows
The distal end surface of the rod 39 abuts against a metal ball 41 disposed in the recess 21 a of the output shaft 21, and the output shaft 21 can be pushed forward while urging the ball 41.

The fixed contacts are a fixed contact 35 on the battery side provided integrally with the battery terminal 3 and a fixed contact 36 on the motor side connected to the brush 14 (positive electrode side) (see FIG. 4). The movable contact 37 is held on the outer periphery of the cylindrical member 38 via an insulating member 42, and a contact pressure by a contact spring 43 is applied through the insulating member 42.
The movable contact 37 conducts between the fixed contacts 35 and 36 when the cylindrical member 38 moves integrally with the plunger 34 and contacts the fixed contacts.

The above-mentioned feeder line holding member 28 is formed of an insulating material (eg, resin), and as shown in FIG. 3, a pedestal portion 28b on which a wiring fixing portion 28a for passing the feeder line 25 is formed. A cylindrical connecting portion 28c protruding downward from the bottom surface of the pedestal portion 28b, and a substantially conical fitting portion 28d provided below the connecting portion 28c. However, the connecting portion 28c and the fitting portion 28d have a vertical groove 28e (see FIG. 2) formed at the center thereof, and are divided on both sides of the vertical groove 28e. As shown in FIG. 2, the rear case 10 to which the power supply line holding member 28 is attached is formed with a round hole 10a into which the fitting portion 28d is inserted into the wall surface in the direction in which the battery terminal 3 projects. The pedestal portion 28 is formed on the outer peripheral surface on which the
A groove 10b slightly wider than the width w of b is formed along the axial direction.

The pedestal portion 28b of the power supply line holding member 28 is restricted from rotating with respect to the rear case 10 by fitting both sides on the bottom side into grooves 10b formed on the outer peripheral surface of the rear case 10. The wiring fixing portion 28 a is formed at a position where the power supply line 25 can be held at a height h from the outer peripheral surface of the rear case 10. The connecting portion 28c has an outer diameter slightly smaller than the inner diameter of the round hole 10a of the rear case 10. The fitting portion 28d has a small-diameter portion at the front end whose outer diameter is smaller than the inner diameter of the round hole 10a, and a large-diameter portion at the rear end (on the side of the connecting portion 28c) having the round hole 10a.
The outer diameter is set larger than the inner diameter of. When the fitting portion 28d is inserted into the round hole 10a of the rear case 10, the vertical groove 28e is crushed from both sides and is elastically deformed so that the large diameter portion can pass through the round hole 10a. After passing through the round hole 10a, the shape of the round hole 10a is prevented by returning to the original shape again.

Next, the operation of this embodiment will be described. When the key switch 29 is closed and the attraction coil 31 is energized, the plunger 34 is attracted by the magnetic force generated by the attraction coil 31 and moves on the inner periphery of the sleeve 33. When the cylindrical member 38 moves integrally with the plunger 34 and the rod 39 is pushed forward, the output shaft 21 is pushed forward (to the side of the ring gear) via the ball 41 abutting on the distal end surface of the rod 39. On the other hand, when the movable contact 37 held by the cylindrical member 38 contacts the fixed contacts 35 and 36 and closes the fixed contacts 35 and 36 due to the movement of the plunger 34, a current flows through the armature 12 through the brush 14. A rotating force is generated in the armature 12. When the rotation of the armature 12 is reduced by the reduction gear and transmitted to the output shaft 21, the pinion gear 22 that has moved forward together with the output shaft 21 meshes with the ring gear, and the output shaft 2
One rotation is transmitted from the pinion gear 22 to the ring gear to start the engine.

When the key switch 29 is opened and the energization of the suction coil 31 is stopped after the engine is started, the plunger 34 that has been sucked up to that point returns to the initial position (the position shown in FIG. 1). When the plunger 34 returns, the force that has pushed out the output shaft 21 through the transmission means disappears. Therefore, the output shaft 21 is pushed back by receiving the reaction force of a return spring (not shown), and
2 comes off the ring gear and returns to the rest position (the position shown in FIG. 1). When the plunger 34 returns, the movable contact 37 separates from the fixed contacts 35 and 36 to open the motor contact, so that the power supply to the armature 12 is cut off and the rotation of the armature 12 is stopped.

(Effects of the First Embodiment) According to the present embodiment,
The feeding direction of the feeder line 25 with respect to the starter 1 is fixed by the feeder line holding member 28 attached to the rear case 10 (in the present embodiment, the feeder line 25 is drawn out from the battery terminal 3 to the rear side of the starter 1 along the axial direction). At the same time, a constant distance h can be maintained between the outer peripheral surface of the rear case 10 and the power supply line 25. This prevents the power supply line 25 from contacting the outer peripheral surface of the machine frame (rear case 10), thereby preventing a situation in which the coating of the power supply line 25 is damaged and short-circuited. In addition, the power supply line 25
And contact with the machine frame.

(Second Embodiment) FIG. 5 is a sectional view of the starter 1. This embodiment shows an example in which the battery terminal 3 is disposed near the front of the starter 1. The machine frame having a substantially cylindrical shape includes a front case 6, a yoke 8, and a rear case 10, and the battery terminal 3 is attached to the front case 6 via an insulating member 44 (terminal holding member). The insulating member 44 is fixed to the front case 6 by tightening the nut 23 screwed to the screw portion 3 a of the battery terminal 3. This insulating member 44
An insulating portion 44a for insulatingly holding the battery terminal 3;
A wiring fixing portion 44b that holds the power supply line 25 and a pedestal portion 44c that forms the wiring fixing portion 44b at a predetermined height from the outer peripheral surface of the front case 6 are integrally formed.

On the other hand, in the front case 6, a groove 6a slightly wider than the width of the pedestal portion 44c is formed along the axial direction on the outer peripheral surface in the direction in which the battery terminal 3 protrudes. The rotation of the insulating member 44 with respect to the front case 6 is restricted by fitting both sides of the bottom of the portion 44c. Thus, the feeding direction of the power supply line 25 is fixed by passing the power supply line 25 connected to the battery terminal 3 through the wiring fixing portion 44b of the insulating member 44. Further, a feeder line holding member 28 is attached to the rear case 10 in the same manner as in the first embodiment to regulate the direction in which the feeder line 25 is taken out and to extend from the outer peripheral surface of the machine frame (rear case 10) to the feeder line 25. Distance h is secured. Note that the feeder line holding member 28 does not necessarily need to restrict the direction in which the feeder line 25 is taken out to the same direction as the takeout direction fixed by the insulating member 44.

According to the present embodiment, when the battery terminal 3 is disposed on the front case 6 of the starter 1, the power supply line 25 can be routed over a long distance along the outer peripheral surface of the machine frame. However, with the insulating member 44 attached to the front case 6 and the feed line holding member 28 attached to the rear case 10, the direction in which the feed line 25 is taken out is fixed, and the connection between the outer peripheral surface of the machine frame and the feed line 25 is established. By maintaining the power supply line 25 with a constant interval h between them, the contact between the power supply line 25 and the outer peripheral surface of the machine frame can be reliably prevented.
As a result, it is possible to prevent a situation in which the coating of the power supply line 25 is damaged and short-circuiting occurs, and it is possible to prevent the starting motor 2 from being adversely affected by a magnetic field generated when a current flows through the power supply line 25.

(Modification) The insulating member 44 described in the second embodiment has an insulating portion 44a for insulating and holding the battery terminal 3.
And the wiring fixing portion 44b and the pedestal portion 44c are integrally formed, but the insulating portion 44a and the wiring fixing portion 44b and the pedestal portion 44c may be divided. Further, when there is sufficient space on the vehicle side, even if the feeder line holding member 28 on the rear case 10 side is not used, the direction in which the feeder line 25 is taken out by the pedestal portion 44c of the insulating member 44 and the wire fixing portion 44b is changed by the starter. By making the direction substantially perpendicular to one axis, contact between the power supply line 25 and the outer peripheral surface of the machine frame can be prevented. This also allows the feed line 25 to be taken out in a direction substantially perpendicular to the axis of the starter 1 for the feed line holding member 28 described in the first embodiment. Another yoke 8 is provided between the insulating member 44 and the feeder line holding member 28.
A power supply line holding member may be provided thereon. In this case, the material of the power supply line holding member provided on the yoke 8 is made of a material having a low magnetic permeability, so that it is possible to prevent the starting motor 2 from being adversely affected by a magnetic field generated when a current flows through the power supply line 25. .
It is needless to say that the frame to which the insulating member 44 and the power supply line holding member 28 are attached may be formed integrally with the frame, as long as the frame is made of an insulating material or a material having low magnetic permeability.

[Brief description of the drawings]

FIG. 1 is a sectional view of a starter (first embodiment).

FIG. 2 is a sectional view of a main part of a starter showing an operation of a power supply line holding member.

FIG. 3 is a perspective view of a power supply line holding member.

FIG. 4 is an energization circuit diagram of a starting motor.

FIG. 5 is a sectional view of a starter (second embodiment).

FIG. 6 is a sectional view of a starter (conventional example).

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 starter 2 start motor (motor) 3 battery terminal 5 electromagnetic switch 6 front case 7 center case 8 yoke 9 brush holder 10 rear case 21 output shaft (power transmission mechanism) 22 pinion gear (power transmission mechanism) 24 battery 25 power supply line 28 supply Wire holding member 44 Insulating member (terminal holding member)

Claims (7)

[Claims] An electric motor for generating a rotational force; an electromagnetic switch for controlling a current supplied to the electric motor; a power transmission mechanism for transmitting a rotational force generated by the electric motor to an engine; the electric motor; and the electromagnetic switch. And a substantially cylindrical machine frame housing the power transmission mechanism; a battery terminal protruding from the machine frame to the outside and connected to a power supply line for supplying power from a battery; A feeder holding member provided to regulate a direction in which the feeder wire is taken out from the machine frame. 2. An electric motor for generating a rotational force, an electromagnetic switch for controlling a current supplied to the electric motor, a power transmission mechanism for transmitting the rotational force generated by the electric motor to an engine, the electric motor, and the electromagnetic switch And a substantially cylindrical machine frame housing the power transmission mechanism; a battery terminal protruding from the machine frame to the outside and connected to a power supply line for supplying power from a battery; A starter, comprising: a power supply line holding member provided to hold the power supply line at an interval between an outer peripheral surface of the machine frame and the power supply line. 3. A starter according to claim 1, wherein said feeder is provided on said machine frame body and holds said feeder line at an interval between an outer peripheral surface of said machine frame body and said feeder line. A starter comprising a member. 4. The starter according to claim 1, wherein the power supply line holding member is formed of an insulating material or a low magnetic permeability material. 5. The starter according to claim 1, wherein the power supply line holding member is formed integrally with an insulating terminal holding member that holds the battery terminal at a part of the machine frame. A starter characterized in that: 6. The starter according to claim 1, wherein the power supply line holding member is formed integrally with the machine frame. 7. The starter according to claim 1, wherein the power supply line holding member is provided at a plurality of positions on the machine frame.