KR102004251B1 - Electro-mechanic tread braking apparatus for railway vehicle - Google Patents

Abstract

An electromechanical tilting braking device for a railway vehicle includes a shoe holder on which a braking device is mounted, a shoe holder link for fixing the shoe holder, and an actuator for driving the shoe holder, the actuator including a frame portion, a screw drum, Plates, input gears, push axles, and push rods. The frame portion forms a storage space therein. The threaded drums are housed in the receiving space, and threading is formed on the inner surface. The at least one threaded plate is rotated relative to the threaded drum along the threads. The input gear provides a relative rotational driving force between the threaded drum and the threaded plate. The push axle is connected to either the screw drum or the screw plate, and moves forward or backward in response to the relative rotation of the screw drum and the screw plate. The push rod is connected to an end of the push axis to drive the shoe holder.

Description

ELECTRO-MECHANIC TREAD BRAKING APPARATUS FOR RAILWAY VEHICLE BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromechanical tilted braking device, and more particularly, to an electromechanical tilting braking device for a railway car which is applied to a railway vehicle and has high response and high reliability and performs braking using an electric motor.

As shown in Fig. 1, the contact surface braking device 1 used in braking a conventional railway vehicle includes a shoe holder 2 on which a braking force is provided by contact with a wheel and on which the braking device is mounted, A shoe holder link 3 for fixing the valve body 2 so that the valve body 2 is positioned at a predetermined position, and an actuator for generating a braking force using pneumatic or hydraulic pressure. In this case, the actuator is a cylinder 4 ).

Such conventional braking apparatus using pneumatic or hydraulic pressure is applied to most domestic railway vehicles, but it is difficult to reduce the maintenance cost due to low efficiency, slow response characteristics, and installation of auxiliary equipment such as a compressor or a dehumidifier there is a problem.

Accordingly, Korean Patent No. 10-1614896 discloses a technique relating to an electric motor-based modular braking system based on electric signals in order to solve the problem of conventional braking devices using pneumatic or hydraulic pressure, Discloses a technique for solving the problem of a hydraulic or pneumatic braking device.

However, the electric motor type braking system using an electric motor and the like is not yet applied to the braking device, and particularly, in the application of the electric motor type braking system, only the concept of horizontal movement of the friction material through the ball screw is presented And a detailed braking system for providing structural stability or stable braking force due to the transmission of external force and the like is not specifically completed when it is applied to an actual railway vehicle.

Korean Patent No. 10-1614896

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an electric motor for a railway vehicle having a high responsiveness and high reliability of an electric motor, capable of reducing the size and weight of the braking device, The present invention relates to a mechanical asymmetric braking device.

According to one aspect of the present invention, there is provided a contact surface braking apparatus including a shoe holder to which a braking device is mounted, a shoe holder link for fixing the shoe holder, and an actuator for driving the shoe holder, A threaded drum, at least one screw plate, an input gear, a push axle and a push rod. The frame portion forms a storage space therein. The threaded drums are housed in the receiving space, and threading is formed on the inner surface. The at least one threaded plate is rotated relative to the threaded drum along the threads. The input gear provides a relative rotational driving force between the threaded drum and the threaded plate. The push axle is connected to either the screw drum or the screw plate, and moves forward or backward in response to the relative rotation of the screw drum and the screw plate. The push rod is connected to an end of the push axis to drive the shoe holder.

In one embodiment, the threaded drums rotate and the threaded plates can move forward or backward as the threaded drums rotate.

In one embodiment, the frame portion may include a front frame through which the push axes pass, and a side frame extending from the front frame and covering the outside of the thread drum.

In one embodiment, the front frame is provided with a linear guide to which the push ax is moved, and a rotating bearing may be fixed between the inner surface of the side frame and the outer surface of the screw drum.

In one embodiment, the push rod is connected to one end of the push axle, and two screw plates spaced apart from each other by a predetermined distance may be connected to the other end of the push axle.

In one embodiment, the input gear is connected to the rear surface of the screw drum, and the front surface of the screw drum is opened so that the push axle can be penetrated.

In one embodiment, the threaded plate is rotated, and the threaded drum can be advanced or retracted as the threaded plate rotates.

In one embodiment, the frame portion includes a side frame that covers the outside of the threaded drum, and a guide unit for guiding the movement of the threaded drum may be fixed between the inner surface of the side frame and the outer surface of the threaded drum .

In one embodiment, the push axle may include a first pushrod connected between the front side of the screw drum and the pushrod.

In one embodiment, the frame portion further includes a front frame extending from the side frame and through which the first pushing axle passes, and the front frame may be formed with a linear guide through which the first pushing axle is moved.

In one embodiment, the push ax is passed through an open rear surface of the screw drum, and two screw plates spaced apart at a predetermined interval are connected to one end, and a second push axis connected to the input gear is connected to the other end. .

In one embodiment, the guide unit may include front and rear stoppers located at both ends to limit the travel distance of the thread drums.

In one embodiment, the apparatus may further include an internal threaded drum passing through an open rear surface of the threaded drum, one threaded plate connected at one end and the input gear connected at the other end.

In one embodiment, a thread is formed on an outer surface of the inner threaded drum, and an extended portion that engages with a thread of the inner threaded drum may be formed on a rear surface of the threaded drum.

In one embodiment, the frame portion further includes a rear frame extending from the side frame, and a rotational bearing may be fixed between the rear frame and the input gear.

In one embodiment, the actuator further includes a motor for generating a driving force, a speed reducer for amplifying a driving force of the motor, and a power transmission unit for further controlling the amplified driving force and for providing a driving force to the driving unit .

According to the embodiments of the present invention, since the operation of the braking device is controlled through the electric signal, the prime time can be shortened compared with the conventional hydraulic or pneumatic braking system, The braking force can be constantly generated with high reproducibility.

Further, compared to the conventional braking system, the system can be made lighter and smaller, and the applicability to a train system such as a lightweight train or a two-story train can be improved.

The braking system can be implemented by converting the rotational driving force provided for the relative rotational drive of the screw drum and the screw plate into the reciprocating motion of the push axle, and the stroke of the push axle can be accurately controlled as the screw thread is formed.

Further, by arranging the guide unit which can change the fixing position of the rotary bearing or realize the sliding according to the rotary drive or the reciprocating drive of the screw drum, the actuator drive can be optimized to maintain the braking accuracy and the quick response characteristic.

Further, by providing the screw plates spaced apart from each other by a predetermined distance, or by designing the extension of the threaded drum so as to realize the function of the screw plate, resistance to external force generated when braking the actual railway vehicle is improved, Can be improved.

In particular, the stroke of the push axle can be maximized by designing the screw plate to have the function of the screw plate through the extension.

The frame unit may include a front frame to limit the stroke of the push axle and guide the reciprocating motion of the push axle. When the front frame is omitted, the guide unit may include a front or rear stopper, So that stable braking can be performed.

1 is a perspective view showing a conventional contact surface braking device.
FIG. 2 is a schematic view showing a contact surface braking device according to an embodiment of the present invention.
3 is a cross-sectional view showing the inside of the actuator of Fig.
4 is a cross-sectional view illustrating the inside of an actuator of a contact surface braking device according to another embodiment of the present invention.
5 is a cross-sectional view illustrating the inside of an actuator of a contact surface braking device according to another embodiment of the present invention.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing. The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms.

The terms are used only for the purpose of distinguishing one component from another. The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise.

In the present application, the term "comprises" or "comprising ", etc. is intended to specify that there is a stated feature, figure, step, operation, component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

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

FIG. 2 is a schematic view showing a contact surface braking device according to an embodiment of the present invention. 3 is a cross-sectional view showing the inside of the actuator of Fig.

Referring to FIGS. 2 and 3, the contact surface braking apparatus 10 according to the present embodiment includes a shoe holder 600, a shoe holder link 500, and an actuator 100.

The shoe holder 600 is equipped with a brake shoe 700 and the brake shoe 700 rubs against a tread surface of a wheel of a railway vehicle (not shown) to generate a braking force.

The shoe holder link 500 fixes the shoe holder 600 and is connected to an arm 510 extending from the actuator 100. In this case, an elastic body, for example, a spring is mounted on the arm 510 so that the shoe holder 600 is brought into close contact with a push rod, which will be described later, of the actuator 100.

The shoe holder 600 is connected to the shoe holder 500 so as to be rotatable so that the shoe holder 600 is positioned at an optimum position or angle according to the state of the abutment surface of the wheel, can do.

The actuator 100 includes a power transmitting unit 110, a speed reducer 120, a motor controller 130, a motor 140 and a driving unit 150 to drive the shoe holder 600.

First, the motor 140 generates power, and the power generated from the motor 140 is controlled by the motor controller 130 in various ways.

The speed reducer 120 primarily amplifies the power generated from the motor 140 and supplies the amplified power to the power transmission unit 110. The power transmission unit 110 transmits power And transmits the driving force to the driving unit 150 by switching the direction of the power.

The driving force generated by the motor 140 is supplied to the driving unit 150 and the shoe holder 600 is driven according to the driving of the driving unit 150 so that the braking operation Is implemented.

More specifically, the configuration and operation of the actuator 100 will be described with reference to FIG.

3, the structure of the motor 140, the motor controller 130, the speed reducer 120, and the power transmission unit 110 is omitted. In the actuator 100, Respectively. In this case, the motor 140, the motor controller 130, the speed reducer 120, and the power transmission unit 110 may be installed at appropriate positions in the actuator 100.

The actuator 100 further includes a frame 160 which forms a receiving space 165. The frame 160 includes a front frame 161 and a front frame 161 161 extending from the side frame 162. [

The front frame 161 and the side frame 162 may extend in a direction perpendicular to each other as shown in the figure. The front frame 161 has a circular plate shape so that the side frame 162 is cylindrical And may be formed in a side surface shape. Accordingly, the overall shape of the frame portion 60 may be a cylinder shape. Alternatively, the overall shape of the frame portion 160 may be variously modified.

The driving unit 150 includes an input gear 151, a screw drum 152, a first screw plate 154, a second screw plate 155, a rotation bearing 156, a push axle 157, and a push rod 159 ).

The input gear 151 is connected to the rear surface of the screw drum 152 and receives power transmitted from the power transmission unit 110 to rotate. Accordingly, as the input gear 151 rotates, the threaded drum 152 also rotates simultaneously.

The threaded drum 152 is accommodated in the receiving space 165 and may have a cylindrical shape as a whole.

In this case, the rear surface of the threaded drum 152 is fixed to the input gear 151 as described above. On the inner surface of the side surface of the threaded drum 152, a thread 153 is formed do. On the other hand, the front surface of the screw drum 152 is opened and passes through the push axle 157 described later.

The first and second screw plates 154 and 155 are engaged with the threads 153 formed on the inner surface of the screw drum 152.

The first and second screw plates 154 and 155 are rotated by the screw drums 152 and 152 so that the first and second screw plates 154 and 155 are rotated with respect to the first and second screw plates 154 and 155, And is reciprocated forward or backward in accordance with the rotation of the motor.

Meanwhile, when the threaded drum 152 has a cylindrical shape, the first and second threaded plates 154 and 155 may have a circular plate shape.

The first screw plate 154 and the second screw plate 155 are spaced apart from each other by a predetermined distance and extend through the first and second screw plates 154 and 155, .

In this embodiment, since the first and second screw plates 154 and 155 are disposed apart from each other in a pair, the control of the reciprocating distance of the push axle 157 is more precisely controlled to improve the control performance And the resistance against the external force or the resistance force transmitted from the pushing axle 157 in accordance with the braking operation can be improved with respect to the extending direction of the pushing axle 157. Accordingly, And reliability and durability can be improved.

Further, the distance between the first and second screw plates 154 and 155 may be set considering the size and structure of the screw drum 152, or the performance or efficiency of the braking control.

3 is defined as the maximum possible stroke of the push axle 157, which is the distance between the rear surface of the screw drum 152 and the second screw plate 155. As shown in FIG. In this case, it is possible to use all of the maximum stroke 'A' of the push axle 157. However, in general, braking is performed using a stroke of 'B' which is smaller than the maximum stroke. In this case, 'C is a range of adjustable distances capable of adjusting the stroke of the push axle 157.

In this case, the adjustable distance 'C' is set such that the motor controller 130 moves backward to a point a certain distance behind the braking action point recognized in the braking operation and maintains the distance between the braking member and the wheel constant This function can be defined as the distance that can be adjusted by this automatic interval adjustment function.

The rotation bearing 156 is disposed between the inner surface of the side frame 162 and the outer surface of the threaded drum 152 so that the threaded drum 152 rotates with respect to the side frame 162.

In this case, the rotation bearing 156 restrains only the rotation of the threaded drum 152 so as to limit the reciprocation of the threaded drum 152 in the forward and backward directions.

3, one of the rotary bearings 156 is disposed, but a plurality of the rotary bearings 156 may be disposed.

The push axle 157 has one end connected to the push rod 159 and the other end connected to the first and second screw plates 154 and 155.

Thus, when the first and second screw plates 154 and 155 reciprocate forward or backward in accordance with the rotation of the screw drum 152, the push axle 157 also reciprocates forward or backward .

The push rod 159 advances or retracts the shoe holder 600 at the end of the push axle 157. When the shoe holder 600 advances, When the shoe holder 600 is retracted, the brake shoe 700 is moved away from the wheel contact surface of the railway car and the braking is stopped.

In this case, a linear guide 164 is formed in the front frame 161 of the frame part 160 so that the push axle 157 passes through the front frame 161 and reciprocates forward or backward. do.

As described above, the rotational driving force provided from the input gear 151 rotates the screw drum 152, whereby the reciprocating motion of the first and second screw plates 154 and 155 is induced, And the brake shoe 700 performs braking by the push rod 159 in accordance with the reciprocating motion of the axle 157.

4 is a cross-sectional view illustrating the inside of an actuator of a contact surface braking device according to another embodiment of the present invention.

The actuator 200 of the contact surface braking device according to the present embodiment is similar to that of the contact surface braking device 10 described with reference to Figs. 2 and 3 except for the frame portion 260, the driving portion 250, The same reference numerals are used for the same components and redundant explanations are omitted.

That is, the actuator 200 in the present embodiment also includes the motor 140, the motor controller 130, the speed reducer 120, and the power transmitting portion 110, Lt; / RTI >

4, the actuator 200 of the present embodiment further includes a frame unit 260, a driving unit 250 and a guide unit 270. The frame unit 260 includes a front frame 261, A side frame 262, and a rear frame 263.

The front frame 261 and the rear frame 263 are disposed to face each other and the side frame 262 extends in a direction perpendicular to the front and rear frames 261 and 263. Thus, the frame portion 260 forms a cylinder shape as a whole and forms a receiving space 265 therein. Alternatively, the overall shape of the frame portion 260 may be variously modified.

The driving unit 250 includes an input gear 251, a screw drum 252, a first screw plate 254, a second screw plate 255, a rotation bearing 256, a first pushing wheel 257, A pushrod 258 and a pushrod 259.

The guide unit 270 includes a guide portion 271 and a sliding portion 272.

The input gear 251 is located on the rear side of the screw drum 252 and receives power transmitted from the power transmission unit 110 to rotate. However, in this embodiment, the rotation bearing 256 is disposed between the input gear 251 and the rear frame 263, so that the input gear 251 is rotated with respect to the rear frame 263 .

The first and second screw plates 254 and 255 are spaced apart from each other by a predetermined distance and the input gear 251 is connected to the other end of the second push axis 258.

As the input gear 251 rotates, the second pushing axle 258 rotates and the first and second screw plates 254 and 255 connected to the second pushing axle 258 are also rotated .

The input gear 251 is fixed to the rear frame 263 through the rotation bearing 256 and rotates so that the second push axle 258 and the first and second screw plates 254 , 255) also rotate in the correct position, and no reciprocating motion such as forward or backward movement is performed.

Since the pair of first and second screw plates 254 and 255 are spaced apart from and fixed to the second pushing axle 258 in this embodiment as well, the control of the reciprocating distance of the second pushing axle 258 It is possible to improve the control performance and improve the resistance against the external force or the resistance force transmitted from the second pushing axle 258 in accordance with the braking with respect to the extending direction of the second pushing axle 258 The stability, reliability, and durability of driving the driving unit 250 can be improved.

Further, the distance between the first and second screw plates 254 and 255 may be set considering the size and structure of the screw drum 252, or the performance or efficiency of the braking control.

The threaded drum 252 is accommodated in the receiving space 265 and may have a cylindrical shape as a whole.

In this case, the rear side of the threaded drum 252 is opened as shown, and the second pushing-off shaft 258 is penetrated through the opened rear side. Alternatively, the front surface of the threaded drum 252 may be closed, and the first pushing axis 257 may be fixed to the front surface of the closed threaded drum 252.

The first and second screw plates 254 and 255 are engaged with the threads 253 formed on the inner surface of the screw drum 252.

In this case, the sliding portion 272 is fixed parallel to the extending direction of the side frame 262 along the outer surface of the threaded drum 252, and the sliding portion 272 is fixed to the side frame 262 And is guided by the guide portion 271 to slide along the extension direction of the side frame 262, that is, the extension direction of the first and second push axles 257 and 258.

That is, in this embodiment, as the first and second screw plates 254, 255 engaged with the threads 253 rotate at a fixed position, the screw drums 252 are reciprocated in forward or backward movement In this case, the threaded drum 252 is reciprocated forward or backward with respect to the side frame 262 together with the sliding portion 272.

In this case, when the threaded drum 252 is moved forward, the maximum distance forwardly moved by the front frame 261 is limited. When the threaded drum 252 is moved backward, The maximum distance that the plate 254 is moved backward is limited.

The screw drum 252 is reciprocated forward or rearward and the first pushing axle 257 fixed to the front surface of the screw drum 252 is also moved in accordance with the movement of the screw drum 252 And reciprocates forward or backward.

Thus, the push rod 259 fixed to the end of the first push axle 257 is reciprocated, and the braking wheel 700 rubs against the answer of the wheel and performs braking.

That is, in this embodiment, the rotational drive of the input gear 251 is performed by the engagement of the first and second screw plates 254 and 255 and the screw drum 252, Motion, so that the damping braking is performed.

5 is a cross-sectional view illustrating the inside of an actuator of a contact surface braking device according to another embodiment of the present invention.

The actuator 300 of the contact surface braking device according to the present embodiment is similar to that of the contact surface braking device 10 described with reference to Figs. 2 and 3 except for the frame portion 360, the driving portion 350 and the guide unit 370 The same reference numerals are used for the same components and redundant explanations are omitted.

That is, the actuator 300 in the present embodiment also includes the motor 140, the motor controller 130, the speed reducer 120, and the power transmitting portion 110, Lt; / RTI >

5, the actuator 300 further includes a frame unit 360, a driving unit 350, and a guide unit 370. The frame unit 360 includes a side frame 362, And a rear frame 363.

The rear frame 363 is positioned behind the actuator 300 and the side frame 362 extends vertically from the rear frame 363 and forms a receiving space 365 therein. Although the frame part 360 does not include the front frame, the frame part 360 has a cylindrical shape as a whole.

In this case, a bellows-shaped blocking film (not shown) may be formed on the front surface of the frame unit 360 to prevent foreign substances from entering from the outside.

The drive unit 350 includes an input gear 351, a threaded drum 352, a threaded plate 354, a rotational bearing 356, a first pushing shaft 357, an internal threaded drum 358 and a pushrod 359, .

The guide unit 370 includes a guide portion 271, a sliding portion 372, a front stopper 373, and a rear stopper 374.

The input gear 351 is located on the rear side of the screw drum 352 and receives power transmitted from the power transmission unit 110 to rotate. However, in this embodiment, the rotation bearing 356 is disposed between the input gear 351 and the rear frame 363, so that the input gear 351 is rotated with respect to the rear frame 363 .

In this embodiment, the threaded plate 354 is connected to one end of the internal threaded drum 358, and the input gear 351 is connected to the other end.

Thus, as the input gear 351 rotates, the internal threaded drums 358 rotate and the threaded plate 354 connected to the internal threaded drums 358 also rotates.

In this case, since the input gear 351 is fixed to the rear frame 363 through the rotation bearing 256, the internal thread drum 358 and the screw plate 354 also rotate in the right position , A reciprocating motion such as forward or backward is not performed.

In addition, a thread is formed on the outer surface of the inner threaded drum 358, and the thread of the inner threaded drum 358 is engaged with the extended portion 355 of the threaded drum 352, which will be described later.

The threaded drum 352 is accommodated in the receiving space 365 and may have a cylindrical shape as a whole.

In this case, the threaded drum 352 has a front surface closed and a thread 353 formed on the inner surface of the side. An extension 355 is formed on the rear surface of the screw drum 352 and an opening is formed in the extension 355 to allow the internal screw thread 358 to pass through the opening.

The inner threaded drums 358 are located inside the threaded drums 352 and the threaded plates 354 rotate in engagement with the threads 353 of the threaded drums 352. The extended portion 355 is engaged with the thread formed on the outer surface of the inner threaded drum 358 to rotate.

That is, although only one screw plate 354 is provided in the present embodiment, since the extending portion 355 is engaged with the inner screw thread 358 and rotates, the pair of screws The same effect as that provided by the plates can be obtained.

That is, even in this embodiment, since the screw plate 354 and the extended portion 355 are spaced apart from and connected to the internal threaded drums 358 by a predetermined distance, the control of the reciprocating distance of the threaded drums 352 is more accurate, It is possible to improve the resistance against the external force or the resistance force transmitted from the first pushing axle 357 in accordance with the braking with respect to the extending direction of the first pushing axle 357, 250 can be improved in stability, reliability, and durability.

Further, in the present embodiment, since only one screw plate 354 is provided, the movement stroke of the screw plate 354 relatively moves the length of the internal screw drum 358 or the length of the screw drum 352 substantially It can be set relatively large. Accordingly, it is possible to perform braking with more various braking forces, and to control the performance and efficiency of the braking control in various ways.

The sliding portion 372 is fixed parallel to the extending direction of the side frame 352 along the outer surface of the screw drum 352 and the sliding portion 372 is fixed to the side frame 362 Is guided by the guide portion 371 and is slid along the extending direction of the side frame 362, that is, the extending direction of the first pushing axle 357.

That is, in this embodiment, as the threaded plate 354 engaged with the thread 353 and the internal threaded drum 358 engaged with the extended portion 355 rotate at a fixed position, 352 reciprocate forward or backward. In this case, the threaded drums 352 slide forward and backward with respect to the side frames 362 together with the sliding portions 372.

At this time, when the threaded drum 352 moves forward, the maximum distance forwardly moved by the front stopper 373 is limited. When the threaded drum 352 moves backward, the rear stopper 374 is limited.

As described above, the threaded drums 352 reciprocate forward or backward. The pushing axes 357 fixed to the front surface of the threaded drums 352 are also moved forward or backward according to the movement of the threaded drums 352, And reciprocates backward.

Thus, the push rod 359 fixed to the end of the push axle 357 makes a reciprocating motion, and the brake ring 700 rubs against the answer of the wheel and performs braking.

That is, in this embodiment, the rotational drive of the input gear 351 is performed by engagement of the screw plate 354, the screw drum 352, the inner screw drum 358 and the extending portion 355, Is switched to the reciprocating motion of the threaded drum 352, whereby the contact surface braking is performed.

According to the embodiments of the present invention as described above, the operation of the braking device is controlled through the electrical signal, so that the prime time can be shortened compared with the conventional hydraulic or pneumatic braking system, The braking force can be constantly generated with high reproducibility.

Further, compared to the conventional braking system, the system can be made lighter and smaller, and the applicability to a train system such as a lightweight train or a two-story train can be improved.

The braking system can be implemented by converting the rotational driving force provided for the relative rotational drive of the screw drum and the screw plate into the reciprocating motion of the push axle, and the stroke of the push axle can be accurately controlled as the screw thread is formed.

Further, by arranging the guide unit which can change the fixing position of the rotary bearing or realize the sliding according to the rotary drive or the reciprocating drive of the screw drum, the actuator drive can be optimized to maintain the braking accuracy and the quick response characteristic.

Further, by providing the screw plates spaced apart from each other by a predetermined distance, or by designing the extension of the threaded drum so as to realize the function of the screw plate, resistance to external force generated when braking the actual railway vehicle is improved, Can be improved.

In particular, the stroke of the push axle can be maximized by designing the screw plate to have the function of the screw plate through the extension.

The frame unit may include a front frame to limit the stroke of the push axle and guide the reciprocating motion of the push axle. When the front frame is omitted, the guide unit may include a front or rear stopper, So that stable braking can be performed.

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 present invention as defined by the following claims. It can be understood that it is possible.

The facing surface braking device according to the present invention has industrial applicability that can be used for the braking of a railway vehicle.

10: an abutment surface braking device 100, 200, 300: an actuator
110: Power transmission unit 120: Reduction gear
130: motor controller 140: motor
150, 250, 350: Driving parts 151, 251, 351:
152, 252, 352: screw drums 154, 254: first screw plate
155, 255: second screw plate 354: screw plate
156, 256, 356: rotational bearing 157: push axis
257, 357: first push axis 258: second push axis
358: Internal thread drums 159, 259, 359: Push rod
270, 370: guide unit 500: shoe holder link
600: shoe holder 700: rider

Claims (16)

A shoe holder on which the shaking holder is mounted, a shoe holder link for fixing the shoe holder, and an actuator for driving the shoe holder,
A frame part forming a storage space inside;
A screw drum accommodated in the storage space and having a screw thread formed on an inner surface thereof;
A threaded plate that rotates relative to the threaded drum along the threads;
An input gear for providing a relative rotational driving force of the screw drum and the screw plate;
A pushing shaft connected to either the threaded drum or the threaded plate and moving forward or backward in response to the relative rotation of the threaded drum and the threaded plate;
A push rod connected to an end of the push axle to drive the shoe holder; And
And an internal screw thread passing through an open rear surface of the threaded drum, one end of which is fixed to the threaded plate and the other end of which is connected to the input gear,
Wherein said pushrod is connected between a front surface of said screw drum and said push rod,
A screw thread is formed on an outer surface of the inner screw drum and an extension part engaged with a thread of the inner screw drum is formed on a rear surface of the screw drum,
Wherein the push axle extends in line with the inner threaded drum. The method according to claim 1,
Wherein the threaded drum rotates and the threaded plate advances or retracts in accordance with rotation of the threaded drum. 3. The apparatus according to claim 2,
A front frame through which the push axle passes; And
And a side frame extending from the front frame and covering the outside of the threaded drum. The method of claim 3,
Wherein the front frame is formed with a linear guide through which the push ax is moved,
And a rotating bearing is fixed between the inner surface of the side frame and the outer surface of the screw drum. 3. The method of claim 2,
Wherein the push rod is connected to one end of the push axis,
And two screw plates spaced apart from each other by a predetermined distance are connected to the other end of the push axle. 6. The method of claim 5,
Wherein the input gear is connected to the rear surface of the screw drum, and the front surface of the screw drum is opened so that the push axle penetrates. The method according to claim 1,
Wherein the threaded plate is rotated and the threaded drum advances or retracts in accordance with rotation of the threaded plate. 8. The method of claim 7,
Wherein the frame portion includes a side frame that covers the outside of the threaded drum,
And a guide unit for guiding the movement of the screw drum is fixed between the inner surface of the side frame and the outer surface of the screw drum. delete 9. The method of claim 8,
Wherein the push axis comprises a first push axis,
The frame portion further comprises a front frame extending from the side frame and through which the first push axle passes,
Wherein the front frame is formed with a linear guide on which the first pushing axis is moved. 9. The pushrod according to claim 8,
Further comprising a second push axis which passes through an open rear surface of the threaded drum and is connected at its one end with two screw plates spaced apart from each other by a predetermined distance and the other end is connected to the input gear, . 9. The apparatus according to claim 8,
And front and rear stoppers positioned at both ends to limit the movement distance of the screw drum. delete delete 9. The method of claim 8,
The frame portion further comprising a rear frame extending from the side frame,
And a rotating bearing is fixed between the rear frame and the input gear. 2. The actuator according to claim 1,
A motor for generating a driving force;
A speed reducer for amplifying a driving force of the motor; And
Further comprising a power transmission unit for further controlling the amplified driving force and for switching the direction to provide the driving force to the driving unit.

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