KR19980010461U - Reduction Gear Structure of Motor - Google Patents

Abstract

The reduction gear attachment structure of the motor is a reduction gear attachment structure of the motor formed by integrally forming at least a plurality of reduction gears on the motor side in order to reduce the motor speed. It is achieved by installing on the motor side. Therefore, since the sun gear is used to reduce the parts occupied area, in accordance with the trend of miniaturization, a motor having a compact gear reduction structure is provided.

Description

Reduction gear attachment structure of motor

The present invention relates to a reduction gear of the motor, and more particularly to a reduction gear attachment structure of the motor that can achieve a reduction in manufacturing cost and slimming by minimizing the attachment space.

In general, the reduction gear of the motor is configured integrally with the motor itself to control the rotational speed, for example, mainly to control the deceleration.

1 is a cross-sectional view showing a structure for attaching a reduction gear of a conventional motor. In this figure, reference numeral 10 denotes a motor, and 20 denotes a PCB substrate. The motor 10 is installed below the PCB substrate 20. On the PCB substrate 20, a plurality of reduction gears 30, 32, and 34 for deceleration are installed. Of course, the motor gear 14 installed on the motor shaft 12 of the motor 10 and these reduction gears 30, 32, 34 are fitted for power transmission. A movable shaft 40 having a slide contact 42 is provided at the end side of the reduction gears 30, 32, and 34, and the PCB substrate 20 at a position corresponding to the movable shaft 40 is provided. A resistor portion 50 having a resistor surface 52 is provided on the phase. The movable shaft 40 is installed in each device for driving the door, seat or door of an air conditioner, for example.

In the structure of the conventional gear reduction gear of the conventional motor having such a structure, when a control unit (not shown) drives the power supply unit to drive the motor 10, the motor 10, which is a mechanism unit, starts to rotate and its rotational force is increased. It is transmitted to the movable shaft 40 having the slide contact 42 via the reduction gears 30, 32, 34.

The slide contact 42 variably contacts the resistance surface 52 of the resistor unit 50 to output a predetermined voltage value and transmits the predetermined voltage value to the control unit. The control unit smoothly decelerates the motor by varying the rotation of the motor 10 by sending an appropriate signal to the power supply after comparing with a predetermined outlier.

By the way, the reduction gear attachment structure of the conventional motor which performs such a structure is large in size because it is a structure which installs many gears in multiple steps, and there existed a limit in miniaturization because of structural disadvantages. This is not a desirable design concept in view of the trend toward miniaturization of various electronic devices. In addition, a reduction gear attachment structure of a conventional motor has a disadvantage in that a circuit on the PCB board is added in proportion to the size to increase manufacturing cost.

The present invention has been made in view of the above problems, and its purpose is to reduce the gear speed for motor speed control, and to achieve cost towns and slimming by configuring each gear with a sun gear and a planetary gear. To provide a reduction gear attachment structure of the motor.

1 is a cross-sectional view showing a structure for attaching a reduction gear of a conventional motor.

Figure 2 is a cross-sectional view showing the structure of the gear reduction gear of the motor of the present invention

Explanation of symbols on the main parts of the drawings

10 motor 12 motor shaft

20: PCB board 30, 32, 34: reduction gear

40,72: movable shaft 42,64: slide contact

50: resistance portion 52: resistance surface

60: first shield case 62: second shield case

66: resistor plate 70: sun gear

74: first planetary gear 76: second planetary gear

The reduction gear attachment structure of the motor of the present invention for achieving the above object, in the reduction gear attachment structure of the motor formed by integrally configuring at least a plurality of reduction gears on the motor side in order to reduce the motor speed, a plurality of planetary gears It is achieved by installing one sun gear on the side of the motor to match the.

In addition to this configuration, the sun gear is provided in a space formed by a combination of the first shield case and the second shield case, and the first shield case and the second shield case respectively pass through the motor shaft and the movable shaft. It is preferable that a hole is provided, and in particular, the second shield case forms a slide contact at the bottom thereof, and the sun gear forms a resistor plate on the upper side corresponding to the installation position of the slide contact.

Therefore, according to the reduction gear mounting structure of the motor of the present invention, since the sun gear is used to reduce the parts occupied area, there is an effect that the motor having a compact gear reduction structure is provided in accordance with the miniaturization trend.

EXAMPLE

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the reduction gear attachment structure of the motor of the present invention. For the same parts as the conventional description, the same reference numerals are used to avoid the complicated description.

A feature of the present invention is that it is composed of one sun gear having a planetary gear for miniaturization. Figure 2 is a cross-sectional view showing a reduction gear attachment structure of the motor of the present invention. In this figure, reference numeral 60, 62 denotes a first shield case and a second shield case which are installed to have a space portion on the motor 10. The first shield case 60 passes through the motor shaft 12 by forming a hole in the center thereof, and the second shield case 62 receives the movable shaft 72 of the sun gear 70, for example. It is connected to each device for driving the door of the car, the seat or the door of the air conditioner. In the sun gear 70, the first planetary gear 74 and the second planetary gear 74 are provided to be rotatable while being fitted with the sun gear 70.

Reference numeral 64 denotes a slide contact formed at the bottom of the second shield case 62, and 66 denotes a resistor plate provided on the sun gear 70 in correspondence with the slide contact 64.

As shown in FIG. 2, when the motor 10 rotates, the motor gear 14 attached to the motor shaft 12 rotates, and the motor gear ( 14) rotates the first planetary gear 74 because it is engaged with the first planetary gear 74, and the first planetary gear 74 is the second planetary gear 76 and the second planetary planet. Since the gear 76 is meshed with the sun gear 70, the gear 76 eventually rotates.

Since the resistor plate 66 is provided on the sun gear 70 and the resistor plate 66 and the slide contact 64 are in contact with each other, the resistance value changes according to the rotation of the sun gear 70. Similarly, a control unit (not shown) controls the power supply unit to drive the motor 10 at an appropriate rotational speed.

As described above, according to the structure of the reduction gear mounting of the motor of the present invention, since the sun gear is used to reduce the parts occupied area, in accordance with the trend of miniaturization, a motor having a compact gear reduction structure is provided.

Claims (5)

In the reduction gear attachment structure of a motor formed by integrally forming at least a plurality of reduction gears on the motor side to reduce the motor speed, A gear reduction gear attachment structure for a motor, characterized in that one sun gear for fitting a plurality of planetary gears is provided on the motor side. The method of claim 1, And the sun gear is installed in a space formed by a combination of the first shield case and the second shield case. The method of claim 2, The first shield case and the second shield case each have a hole for passing through the motor shaft and the movable shaft, the reduction gear mounting structure of the motor. The method of claim 2 or 3, The second shield case is provided with a slide contact at the bottom thereof, wherein the reduction gear mounting structure of the motor. The method of claim 1, And the sun gear has a resistor plate formed thereon corresponding to the installation position of the slide contact.