KR20140104518A - Decelerator and motor brake with the same - Google Patents

Decelerator and motor brake with the same Download PDF

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Publication number
KR20140104518A
KR20140104518A KR1020130016761A KR20130016761A KR20140104518A KR 20140104518 A KR20140104518 A KR 20140104518A KR 1020130016761 A KR1020130016761 A KR 1020130016761A KR 20130016761 A KR20130016761 A KR 20130016761A KR 20140104518 A KR20140104518 A KR 20140104518A
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KR
South Korea
Prior art keywords
gear
inner gear
motor
speed reducer
eccentrically rotated
Prior art date
Application number
KR1020130016761A
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Korean (ko)
Inventor
김진석
최성호
유성욱
Original Assignee
주식회사 만도
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Filing date
Publication date
Application filed by 주식회사 만도 filed Critical 주식회사 만도
Priority to KR1020130016761A priority Critical patent/KR20140104518A/en
Publication of KR20140104518A publication Critical patent/KR20140104518A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
    • F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
    • F16D65/18—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together, e.g. for disc brakes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
    • F16H1/20—Toothed gearings for conveying rotary motion without gears having orbital motion involving more than two intermeshing members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/08—Profiling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/08—Profiling
    • F16H55/0806—Involute profile
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2121/00—Type of actuator operation force
    • F16D2121/18—Electric or magnetic
    • F16D2121/24—Electric or magnetic using motors

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Retarders (AREA)
  • Braking Arrangements (AREA)

Abstract

The present invention relates to a gear reducer and a motor brake including the same. A conventional gear reducer has some disadvantages since multi-staged gear reducers make the arrangement of parts complicate and the motor brake cannot be applied to various kinds of vehicles due to the interference with neighboring parts as a space required for the conventional reductions gears becomes bigger. The purpose of the present invention is to solve the problem. The gear reducers disclosed in the present invention comprise two-staged internal and external gears which eccentrically rotate to effectively increase a reduction ratio with small numbers of parts and to reduce the size of the gear reducer. Disclosed is the motor brake in which the motor as the driving source is connected to the gear reducers and a piston in series to improve the space utilization by reducing a space for mounting the motor brake. The gear reducers and the motor brake including the same are configured to rotate by internally engaging the external gear with the internal gear to improve wear resistance and to reduce noise.

Description

[0001] DESCRIPTION [0002] Decelerator and motor brake with the same [

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speed reducer and a motor brake having the same. More particularly, the present invention relates to a speed reducer capable of effectively increasing the reduction ratio while suppressing an increase in axial thickness of a motor by applying two- .

In general, a disc brake having a parking function for parking a vehicle includes a disc rotating together with a wheel of a vehicle, a base carrier provided with a pair of pad plates disposed on both sides of the disc to press the disc, A motor for generating a driving force, a motor for converting the rotational motion of the motor into a linear motion and transmitting the linear motion to the piston, Unit.

The pair of pad plates can be divided into an inner pad plate adjacent to the piston and an outer pad plate positioned on the opposite side.

A cylinder is provided on one side of the caliper housing, and a piston is provided in the cylinder for urging the inner pad plate toward the disk. The other side of the caliper housing is integrally connected with the downwardly bent fingers of the cylinder so that the outer pad plate can be pressed against the disk with the sliding movement of the caliper housing.

The base carrier is fixed to the vehicle body so that the pair of pad plates can be moved back and forth to the disk while preventing the pair of pad plates from being separated.

The piston reciprocates linearly through driving of the motor during the braking operation, and urges the inner pad plate toward the disk.

Generally, since the motor has a high RPM and a low torque, the torque is usually increased by using a speed reducer, and a speed reducer for increasing the driving force of the motor is connected between the motor and the conversion unit.

Such a reducer conventionally increases the size of the reducer by increasing the size of the reducer and increases the axial thickness of the motor by attaching the multi-stage reduction gear to increase the reduction ratio. By arranging the operation axis of the piston and the rotation axis of the motor in parallel, And it is difficult to mount to various kinds of vehicles due to interference with peripheral parts, and the number of parts increases, resulting in an increase in price, which is disadvantageous in terms of performance and noise.

Open Patent No. 10-2004-0083840 (disclosed on October 6, 2004)

SUMMARY OF THE INVENTION The present invention has been devised to solve the problems described above, and it is an object of the present invention to provide a motor and a reducer which are connected in series on a coaxial shaft, And it is an object of the present invention to provide a speed reducer and a motor brake having the reducer so as to be mounted on various kinds of vehicles.

It is another object of the present invention to provide a speed reducer having a reduced speed reduction ratio, a reduced noise and improved performance, and a motor brake having the reduced speed reducer.

The speed reducer according to the embodiment of the present invention includes a first outer gear fixed to rotate so as not to rotate, an outer shaft having an outer diameter smaller than the inner diameter of the first outer gear and connected to an eccentrically rotating input shaft, A first inner / outer folding gear including a first inner gear rotating eccentrically;

A second inner gear integrally formed with the first inner gear or eccentrically rotated by being restrained by rotation of the first inner gear and a second inner gear provided with an inner diameter larger than the outer diameter of the second inner gear to induce eccentric rotation of the second inner gear A second inner / outer folding gear including a second outer gear provided on an outer periphery of the second inner gear and having an output member provided with an output shaft at a center of the other inner gear; . ≪ / RTI >

The teeth of the first inner gear and the second inner gear, which are formed integrally or are eccentrically rotated with respect to each other for rotation, are made of an involute tooth or a cycloid tooth or have different teeth, and the first outer gear and / The tooth profile of the second outer gear may also have a corresponding tooth profile.

A bearing may be provided between the inner circumferential surface of the first inner gear and the second inner gear and the outer circumferential surface of the input shaft that eccentrically rotates.

A motor brake having a speed reducer according to an embodiment of the present invention is provided with a pair of pad plates that are movable forward and backward on a disk rotating together with a wheel of a vehicle for braking the vehicle, Wherein a conversion unit is used to convert the rotational motion of the motor into a translational motion and transmit the power to the piston, And a speed reducer which is located between the motor and the conversion unit and decelerates the rotation speed of the motor to transmit power to the conversion unit,

Wherein the motor, the speed reducer and the piston are connected in series on a coaxial basis,

Wherein the rotary shaft of the motor is provided with an input shaft for eccentric rotation of the speed reducer,

The speed reducer includes:

And a first inner gear which is connected to an input shaft that is eccentrically rotated and is eccentrically rotated in contact with the first outer gear, the first inner gear being provided at an outer diameter smaller than the inner diameter of the first outer gear A first inner / outer folding gear;

A second inner gear integrally formed with the first inner gear or eccentrically rotated by being restrained by rotation of the first inner gear and a second inner gear provided with an inner diameter larger than the outer diameter of the second inner gear to induce eccentric rotation of the second inner gear A second inner / outer folding gear including a second outer gear provided on an outer periphery of the second inner gear and having an output member provided with an output shaft at a center of the other inner gear; As shown in FIG.

Wherein the gear reducer is integrally formed or the gear teeth of the first inner gear and the second inner gear that are eccentrically rotated with respect to each other are constituted by an involute tooth or a cycloid gear tooth or are formed in different teeth, The teeth of the outer gear and the teeth of the second outer gear may be configured to have teeth corresponding thereto.

The speed reducer may include a bearing disposed between an inner circumferential surface of the first inner gear and a second inner gear and an outer circumferential surface of the input shaft that eccentrically rotates.

The conversion unit may be configured as a spindle unit or a ball-screw type.

The reducer according to the embodiment of the present invention and the motor brake having the reducer can reduce the number of components and reduce the cost by connecting the motor, the reducer, and the piston in series and coaxially connecting the reducer and the piston, As the space utilization increases, it becomes possible to mount the vehicle on various kinds of vehicles.

Also, the reduction gear ratio can be freely implemented according to the relationship between the first inner / outer fold gear and the second inner / outer fold gear, and the reduction gear ratio can be effectively increased.

In addition, since the gears in the second stage of the speed reducer are constructed by being in contact with the gears at the second gear, the wear resistance is improved, the performance is improved, and the noise is reduced.

1 is a sectional view showing a motor brake having a speed reducer according to an embodiment of the present invention.
2 is an exploded perspective view illustrating an exploded view of a structure of a speed reducer according to an embodiment of the present invention.
3 is a side cross-sectional view illustrating the structure of a speed reducer according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below are provided by way of example so that those skilled in the art will be able to fully understand the spirit of the present invention. The present invention is not limited to the embodiments described below, but may be embodied in other forms. In the drawings, the width, length, thickness, and the like of the components may be exaggerated for the sake of convenience. Like reference numerals designate like elements throughout the specification.

As shown in FIG. 1, a motor brake 50 having a speed reducer according to an embodiment of the present invention includes a disk 10 rotating together with a wheel of a vehicle, A carrier 30 provided with a pair of pad plates 11 and 12 disposed so as to perform a pressing operation and a piston 40 for pressing the pair of pad plates 11 and 12, A conversion unit 60 for moving the piston 40 forward and backward; a speed reducer 100 connected coaxially with the conversion unit 60; And a motor 50 for rotating the motor 50 in normal and reverse directions.

The pair of pad plates 11 and 12 are distinguished by an inner pad plate 11 arranged to contact the piston 40 and an outer pad plate 12 arranged to be in contact with a fingering unit 22 to be described later. The pair of pad plates 11 and 12 are provided so as to be able to move forward and backward on a carrier 30 fixed to the vehicle body so as to be able to move back and forth toward both sides of the disk 10. The caliper housing 20 also has a pair of pads (30) so as to be able to move back and forth in the pressing direction of the plates (11, 12).

The caliper housing 20 is provided with a cylinder portion 21 in which a piston 40 is housed in a rear portion thereof and a fingering portion 22 formed in a front portion thereof to bend downwardly to operate the outer pad plate 12 Is integrally formed with the cylinder portion 21.

The piston 40 pushes the inner pad plate 11 toward the disk 10 while linearly reciprocating through the driving of a motor 50 driven to be fixed at a rear side in a braking operation. The driving force of the motor 50 is amplified through the speed reducer 100 and transmitted to the piston 40 through the conversion unit 60. One end of the conversion unit 60 is connected to the piston 40 and the other end of the conversion unit 60 extends toward the backward direction of the piston 40 and is connected to the output shaft 150 of the speed reducer 100.

The motor 50 is disposed outside the cylinder portion 21 in the backward direction of the piston 40 and the speed reducer 100 is disposed between the cylinder portion 21 and the motor 50.

Accordingly, the motor brake 50 is amplified through the reduction gear 100 and the rotational motion of the motor 50 is converted by the conversion unit 60 into a translational motion, thereby pushing the piston 40.

This conversion unit 60 may be configured as a spindle unit. The spindle unit includes a spindle member having a nut spindle member having a female threaded portion formed therein and a male threaded portion coupled to a female threaded portion of the nut spindle member.

Or the conversion unit 60 may be of a ball-screw type to press the piston 40.

Meanwhile, the speed reducer 100 is provided to effectively increase the reduction ratio for increasing the driving force of the motor 50, but also to suppress the increase of the total length of the brake of the motor 50. The structure of the speed reducer 100 will be described in detail. Respectively.

As shown in Figs. 2 and 3, the speed reducer 100 is composed of a two-stage inner / outer folding gear. The two-stage inner / outer folding unit includes a first inner / outer folding unit and a second inner / outer folding unit.

A first outer gear 110 fixed to the first inner / outer folding gear so as not to rotate; a second outer gear 110 connected to the input shaft 101 having an outer diameter smaller than the inner diameter of the first outer gear 110 and eccentrically rotated, And a first inner gear 120 which eccentrically rotates in contact with the outer gear 110.

A second inner gear 130 integrally formed with the first inner gear 120 or eccentrically rotated with respect to rotation of the first inner gear 120 and a second inner gear 130 having an inner diameter larger than the outer diameter of the second inner gear 130, And an output member 145 which is provided in a state of being circumscribed around the second inner gear 130 so as to induce eccentric rotation of the second inner gear 130 and has an output shaft 150 at the center of the other surface thereof And a second outer gear 140 which is provided on the outer side.

The first inner gear 120 and the second inner gear 130 are integrally formed or constrained to each other so that the two inner gears eccentrically rotate together. The first and second inner gears 120 and 130, An input shaft 101 for transmitting the rotational force of the motor 50 to the speed reducer 100 is eccentrically formed.

The input shaft 101 of the motor 50 has a shape in which two cylinders having different diameters are combined and the cylindrical portion having a large diameter is eccentrically rotated from the rotary shaft 51 of the motor 50, And a cylindrical portion having a small diameter is mated with the inner circumferential surface of the second inner gear 130 in a state where the cylindrical portion is coaxially connected to the rotary shaft 51 of the motor 50.

The teeth of the first inner gear 120 and the second inner gear 130 may be of an involute tooth type or a cycloid tooth type or may have different teeth. The gear teeth of the gear 140 may be formed in a corresponding tooth shape.

A bearing 135 is provided on an inner circumferential surface of the first inner gear 120 and the second inner gear 130 which mates with the input shaft 101 connected to the rotary shaft 51 of the motor 50, And the noise is reduced.

Hereinafter, the operation of a speed reducer according to an embodiment of the present invention and a motor brake having the same will be described.

When the motor 50 receives the braking operation by the driver and starts the operation, the rotation shaft 51 of the motor 50 rotates and the eccentric input shaft 101 coupled with the rotation shaft 51 rotates do. The first inner gear 120 is eccentrically rotated by the eccentric rotation of the input shaft 101 so as to be in contact with the first outer gear 110 fixed so that the first inner gear 120 is not allowed to rotate, The first and second inner / outer fold gears are decelerated and output is performed.

The second inner gear 130, which is integrally formed with the first inner gear 120 or is constrained to rotate with respect to each other, is also rotated together with the second inner gear 130, 2 outer gear 140 and eccentrically rotates. The rotational force further reduced by the second inner / outer folding gear is transmitted to the output shaft 150 of the output member 145 provided on the other surface of the second outer gear 140 to transmit the power to the converting unit 60, The pair of pad plates 11 and 12 press the disk 10 to brak down the piston 40 as the conversion unit 60 switches the translational motion of the motor 50 to move the piston 40 forward. .

As described above, the conversion unit 60 may include a spindle unit or a ball-screw type so that the rotational motion of the motor 50 can be converted into a translational motion and transmitted to the piston 40. [

The two-stage inner and outer folding gears are freed to implement the reduction gear ratio by the relationship between the first inner and outer folding gears and the second inner and outer folding gears, and the reduction ratio can be effectively increased. In addition, since a sufficient reduction ratio can be realized by only two reduction gears, it is possible to reduce the size of the reduction gear, reduce the number of parts, and reduce the cost of the product.

As compared with the case where the rotary shaft 51 of the motor 50 is connected in parallel by connecting the rotary shaft 51 of the motor 50 in series with the reducer 100 and the piston 40 in series, It is not necessary to provide a separate mounting space for the motor 50, so that the space utilization can be increased. Therefore, the present invention can be applied to various types of vehicles without interference with surrounding components.

Since the first inner gear 120 and the second inner gear 130 are configured to rotate in contact with the first outer gear 110 and the second outer gear 140, There is an advantage that wear resistance is improved and noise is reduced.

In addition, when a ball-screw type is applied to the conversion unit 60 according to the embodiment of the present invention, the conventional ball-screw type conversion unit does not self-lock, Since the first inner gear 120 and the second inner gear 130, which are input ends, are not reversed by the outer gear 140, the self-locking action becomes possible and the efficiency can be improved.

As described above, the decelerator of the present invention has been described only for the motor deceleration of the motor brake. However, the decelerator using the eccentric torque may not only increase the axial thickness of the motor as well as the motor brake, It can be easily used in a motor-employed mechanism. 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 or scope of the inventive concept as defined by the appended claims.

10: disk 20: caliper housing
30: carrier 40: piston
50: motor 51:
60: conversion unit 100: speed reducer
101: input shaft 110: first outer gear
120: first inner gear 130: second inner gear
140: second outer gear 145: output member
150: Output shaft

Claims (7)

And a first inner gear which is connected to an input shaft that is eccentrically rotated and is eccentrically rotated in contact with the first outer gear, the first inner gear being provided at an outer diameter smaller than the inner diameter of the first outer gear A first inner / outer folding gear;
A second inner gear integrally formed with the first inner gear or eccentrically rotated by being restrained by rotation of the first inner gear and a second inner gear provided with an inner diameter larger than the outer diameter of the second inner gear to induce eccentric rotation of the second inner gear A second inner / outer folding gear including a second outer gear provided on an outer periphery of the second inner gear and having an output member provided with an output shaft at a center of the other inner gear; . The method according to claim 1,
The teeth of the first inner gear and the second inner gear, which are formed integrally or are eccentrically rotated with respect to each other for rotation, are made of an involute tooth or a cycloid tooth or have different teeth, and the first outer gear and / And the teeth of the second outer gear are formed in corresponding teeth. 3. The method according to claim 1 or 2,
And a bearing is provided between the inner peripheral surface of the first inner gear and the second inner gear and the outer peripheral surface of the input shaft that eccentrically rotates. A pair of pad plates are provided so as to be movable forward and backward on a disk rotating together with a wheel of the vehicle for braking the vehicle and the pair of pad plates are fixed to a cylinder provided with a piston moving back and forth to press the disk, Wherein the motor is used as a power source for generating an operation of the motor, and a converting unit is used to convert the rotational motion of the motor into a translational motion to transmit power to the piston, A motor brake having a speed reducer for decelerating a speed to transmit power to the conversion unit,
Wherein the motor, the speed reducer and the piston are connected in series on a coaxial basis,
Wherein the rotary shaft of the motor is provided with an input shaft for eccentric rotation of the speed reducer,
The speed reducer includes:
And a first inner gear which is connected to an input shaft that is eccentrically rotated and is eccentrically rotated in contact with the first outer gear, the first inner gear being provided at an outer diameter smaller than the inner diameter of the first outer gear A first inner / outer folding gear;
A second inner gear integrally formed with the first inner gear or eccentrically rotated by being restrained by rotation of the first inner gear and a second inner gear provided with an inner diameter larger than the outer diameter of the second inner gear to induce eccentric rotation of the second inner gear A second inner / outer folding gear including a second outer gear provided on an outer periphery of the second inner gear and having an output member provided with an output shaft at a center of the other inner gear; And a motor brake. 5. The method of claim 4,
Wherein the gear reducer is integrally formed or the gear teeth of the first inner gear and the second inner gear that are eccentrically rotated with respect to each other are constituted by an involute tooth or a cycloid gear tooth or are formed in different teeth, The outer gear and the second outer gear being formed to have a tooth shape corresponding thereto. The method according to claim 4 or 5,
Wherein the speed reducer is provided with a bearing between an inner circumferential surface of the first inner gear and a second inner gear and an outer circumferential surface of the input shaft that eccentrically rotates. 5. The method of claim 4,
Wherein the conversion unit is configured as a spindle unit or a ball-screw type.
KR1020130016761A 2013-02-18 2013-02-18 Decelerator and motor brake with the same KR20140104518A (en)

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KR1020130016761A KR20140104518A (en) 2013-02-18 2013-02-18 Decelerator and motor brake with the same

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108868586A (en) * 2018-08-21 2018-11-23 曾卫林 Blade-free mud motor
CN114349166A (en) * 2022-01-25 2022-04-15 广东省轻纺建筑设计院有限公司 High-efficient biological rotating disc processing apparatus of improvement type
KR20240047100A (en) 2022-10-04 2024-04-12 에이치엘만도 주식회사 Actuator and brake system comprising the same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108868586A (en) * 2018-08-21 2018-11-23 曾卫林 Blade-free mud motor
CN108868586B (en) * 2018-08-21 2024-02-09 曾卫林 Blade-free underground power drilling tool
CN114349166A (en) * 2022-01-25 2022-04-15 广东省轻纺建筑设计院有限公司 High-efficient biological rotating disc processing apparatus of improvement type
KR20240047100A (en) 2022-10-04 2024-04-12 에이치엘만도 주식회사 Actuator and brake system comprising the same

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