KR20150096895A

KR20150096895A - Starting motor

Info

Publication number: KR20150096895A
Application number: KR1020140017749A
Authority: KR
Inventors: 현경열
Original assignee: 현경열
Priority date: 2014-02-17
Filing date: 2014-02-17
Publication date: 2015-08-26

Abstract

The present invention relates to a starting motor, which includes a motor; a rotation shaft which is rotated by the rotation of the motor, and has a screw part formed on a partial outer circumference thereof; a pinion which is screwed with the rotation shaft, moves in the longitudinal direction of the rotation shaft by the rotation of the rotation shaft, engages with the ring gear of an engine or releases the engaging process, transfers the torque of the motor to the ring gear, and releases the transferring process.

Description

Starting motor device {STARTING MOTOR}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a starting motor device for starting a vehicle, and more particularly, to a starting motor device that improves the operating structure of a pinion selectively engaged with a ring gear of an engine.

Generally, the starting motor device includes an electronic switch that receives power from a battery and moves the plunger to move the pinion and rotate the motor, a motor that rotates by the electronic switch, a pinion that is moved by the electronic switch, And a power transmission device for rotating the ring gear by the rotational force of the motor in a state in which the ring gear is meshed.

Such a conventional starting motor apparatus is disclosed in Korean Utility Model Publication No. 1993-0008390.

In the conventional starting motor device, when the driver turns on the starter key, a magnetic flux is generated in the electronic switch to move the plunger to one side, and the lever provided on the one side rotates about the hinge portion as the plunger moves The overrunning clutch having the distal end portion of the lever is moved to one side in accordance with the rotation of the lever, so that the pinion at the tip of the overrunning clutch is engaged with the ring gear of the engine.

At the same time, the rotation of the motor is transmitted to the ring gear of the engine through the pinion while the motor is rotated by the electronic switch, thereby starting the vehicle.

When the engine is started, the ring gear is rotated faster than the pinion, and the overrunning clutch is operated.

Then, when the supply of power to the electronic switch is interrupted, the lever is returned by spring elasticity, the power of the motor is cut off, and the pinion and the ring gear are separated.

However, the conventional starting motor device has a problem that the operating structure of the pinion is very complicated.

For example, in the conventional starting motor device, since the electronic switch, the lever, and the overrunning clutch are necessarily required for operating the pinion, the size of the product is increased, the number of parts is increased, the manufacturing cost is increased, There is a problem that maintenance of the overrunning clutch is difficult due to a large number of failures.

SUMMARY OF THE INVENTION The present invention has been conceived in order to solve the above-mentioned problems, and it is an object of the present invention to provide a manufacturing method and a manufacturing method thereof, in which the number of parts is reduced to realize a compact size of a product, And to provide a motor device.

An object of the present invention is to provide a motor comprising: a motor; A rotation shaft rotatable by the rotation of the motor and having a threaded portion formed in an outer circumferential region thereof; And a pinion that is threadedly engaged with the rotary shaft and moves along the longitudinal direction of the rotary shaft by rotation of the rotary shaft and engages or disengages the ring gear of the engine and transmits and releases the rotational force of the motor to the ring gear And the starting motor device is characterized in that the starting motor device is provided.

Here, the pinion loader may further include a pinion loader provided on one side of the pinion to increase the inertial force of the pinion.

And a speed reducer provided between the motor and the rotary shaft for reducing the speed of rotation of the motor and transmitting the reduced speed to the rotary shaft.

According to the present invention, by improving the operating structure of the pinion selectively engaging with the ring gear of the engine, the number of parts can be reduced, the size of the product can be compactly realized, the manufacturing cost can be reduced, Management is facilitated.

1 is a schematic cross-sectional view showing a state where a pinion and a ring gear of a starting motor apparatus according to an embodiment of the present invention are disengaged;
Fig. 2 is a schematic sectional view of the starting motor device of Fig. 1 with the pinion and the ring gear engaged,
FIG. 3 is a perspective view of the rotation shaft and the pinion of FIG. 1,
Fig. 4 is an exploded perspective view of the essential part of Fig. 3,
5 is a schematic cross-sectional view of a starting motor device according to another embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Prior to description, elements having the same configuration are denoted by the same reference numerals in representative embodiments, and only other configurations are described for the other embodiments.

1 to 4 show a starting motor device according to an embodiment of the present invention. As shown in these drawings, a starting motor apparatus 10 according to an embodiment of the present invention includes a motor 11, a rotating shaft 21, and a pinion 31.

The motor 11 rotates when power is supplied from the battery.

The rotary shaft 21 has a rod shape of a predetermined length and is rotated by the rotation of the motor 11. [ In this embodiment, the rotary shaft 21 is shown as a substitute for the motor shaft of the motor 11, but the rotary shaft 21 may be provided separately from the motor shaft and connected to the motor shaft by a coupling. Here, the rotary shaft 21 is rotatably supported by a bearing (not shown).

On the other hand, a male threaded portion 23 is formed in a circumferential region of the rotary shaft 21 by a predetermined width along the longitudinal direction of the rotary shaft 21. A pinion 31 meshing with the ring gear 5 of an engine (not shown) is screwed to the male screw portion 23.

A pinion female threaded portion 33 having a thread size corresponding to the male threaded portion 23 of the rotary shaft 21 is formed on the inner periphery of the pinion 31. The pinion 31 has a ring- Accordingly, the pinion 31 is screwed to the male threaded portion 23 of the rotary shaft 21.

The pinion 31 moves along the longitudinal direction of the rotary shaft 21 by the rotation of the rotary shaft 21 and moves along the male threaded portion 23 to engage or disengage the ring gear 5 of the engine, (11) to the ring gear (5).

On the other hand, a ring-shaped pinion loader 41 for increasing the inertial force of the pinion 31 is provided on one side of the pinion 31, for example, at the end of the pinion 31 facing the motor 11. A loader female threaded portion 43 having a thread size corresponding to the male threaded portion 23 of the rotary shaft 21 is formed on the inner periphery of the pinion loader 41. [

The pinion loader 41 is screwed to the male threaded portion 23 of the rotary shaft 21 together with the pinion 31 and reciprocates along the rotary shaft 21. [

Here, it is more effective that the pinion loader 41 has a larger diameter and width than the pinion 31 so as to increase the inertia force of the pinion 31.

This increases the inertia force of the pinion 31 when the pinion 31 is moved toward the ring gear 5 by the rotation of the rotary shaft 21 so that the pinion 31 engages with the ring gear 5 smoothly.

The starting motor device 10 according to the present invention is characterized in that the motor 11, the rotary shaft 21, the pinion 31 and the pinion loader 41 are accommodated in the housing 45 and the housing 45 is fixed to the pinion 31 Is engaged with the ring gear 5 of the engine.

The operation of the starting motor apparatus 10 according to an embodiment of the present invention will now be described.

1, when the user operates the ignition key in a state in which the pinion 31 of the starting motor apparatus 10 and the ring gear 5 of the engine are disengaged, power is supplied to the motor 11 / RTI >

As the power is supplied to the motor 11, the rotating shaft 21 is rotated in one direction by the rotation of the motor 11. [

The pinion 31 and the pinion loader 41 screwed to the male threaded portion 23 of the rotating shaft 21 move toward the ring gear 5 of the engine as the rotating shaft 21 rotates in one direction.

At this time, the inertia force of the pinion 31 is increased by the pinion loader 41, and the pinion 31 engages with the ring gear 5 smoothly.

On the other hand, when the pinion 31 is engaged with the ring gear 5 as shown in Fig. 2, the pinion 31 is no longer moved by the non-threaded end portion of the male thread portion 23. For example, the distal end of the male threaded portion 23 of the rotary shaft 21 serves as a stopper for restricting the movement of the pinion 31. [

The rotational force of the motor 11 is transmitted to the ring gear 5 of the engine through the pinion 31 as the pinion 31 rotates in engagement with the ring gear 5 to start the engine.

On the other hand, when the ring gear 5 rotates faster than the pinion 31 after the start of the engine, the pinion 31 and the ring gear 5 are disengaged.

The ring gear 5 rotates faster than the pinion 31 so that the pinion 31 rotates relatively faster than the rotational shaft 21 so that the pinion 31 is rotated by the pinion 31 Moves away from the gear 5 toward the motor 11, and returns to its original position. Conversely, when the rotating shaft 21 rotates relatively faster than the pinion 31, like the first starting of the starting motor apparatus 10, the pinion 31 is moved toward the ring gear 5. [

5, a starting motor device according to another embodiment of the present invention is shown. The starting motor device 10 'according to another embodiment of the present invention is provided with the speed reducer 51 between the motor 11 and the rotary shaft 21, unlike the above-described embodiment.

The speed reducer 51 serves to decelerate the rotation speed of the motor 11 and to transmit the rotation speed to the rotation shaft 21. The planetary speed reducer composed of the sun gear 53, the planetary gear 55 and the internal gear 57 is shown as the speed reducer 51 in this embodiment, but the present invention is not limited to this, and a speed reducer composed of external gears may be used.

One end of the motor shaft 13 of the motor 11 is connected to the sun gear 53 of the speed reducer 51 and the other end of the rotation shaft 21 is connected to the internal gear 57 of the speed reducer 51, The rotation speed of the motor 11 is reduced through the speed reducer 51 and transmitted to the rotation shaft 21. [

Meanwhile, the operation of the starting motor device 10 'according to another embodiment of the present invention is the same as the operation of the starting motor device 10 according to the above-described embodiment, and a description thereof will be omitted below.

As described above, according to the present invention, the pinion engaging or disengaging with the ring gear of the engine is screwed to the rotating shaft rotated by the rotation of the motor, and the pinion is engaged with or disengaged from the ring gear of the engine by rotation of the rotating shaft , The number of parts can be reduced, and the size of the product can be compactly realized. In addition, manufacturing cost can be reduced, assembly productivity can be improved, and maintenance can be facilitated.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. Accordingly, such modifications or variations are intended to fall within the scope of the appended claims.

5: Ring gear 10, 10 ': Starting motor device
11: Motor 13: Motor shaft
21: rotation shaft 23: male thread portion
31: Pinion 33: Pinion female thread portion
41: Pinion loader 43: Loader female thread part
45: housing 51: speed reducer
53: Sun gear 55: Planetary gear
57: My gear

Claims

A motor;
A rotation shaft rotatable by the rotation of the motor and having a threaded portion formed in an outer circumferential region thereof;
And a pinion that is threadedly engaged with the rotary shaft and moves along the longitudinal direction of the rotary shaft by rotation of the rotary shaft to engage or disengage the ring gear of the engine and to transmit and release the rotational force of the motor to the ring gear And the starting motor device.

The method according to claim 1,
And a pinion loader provided at one side of the pinion for increasing an inertial force of the pinion.

The method according to claim 1,
Further comprising a speed reducer provided between the motor and the rotary shaft for reducing a speed of rotation of the motor and transmitting the reduced speed to the rotary shaft.