KR101759606B1 - Driving apparatus of low floor bogie for tram train and low floor bogie for tram train - Google Patents

Driving apparatus of low floor bogie for tram train and low floor bogie for tram train Download PDF

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Publication number
KR101759606B1
KR101759606B1 KR1020150169451A KR20150169451A KR101759606B1 KR 101759606 B1 KR101759606 B1 KR 101759606B1 KR 1020150169451 A KR1020150169451 A KR 1020150169451A KR 20150169451 A KR20150169451 A KR 20150169451A KR 101759606 B1 KR101759606 B1 KR 101759606B1
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South Korea
Prior art keywords
labyrinth ring
gear portion
case
input gear
disposed
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KR1020150169451A
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Korean (ko)
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KR20170064153A (en
Inventor
한석윤
온정근
김원경
김민수
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한국철도기술연구원
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61C—LOCOMOTIVES; MOTOR RAILCARS
    • B61C9/00—Locomotives or motor railcars characterised by the type of transmission system used; Transmission systems specially adapted for locomotives or motor railcars
    • B61C9/38—Transmission systems in or for locomotives or motor railcars with electric motor propulsion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61C—LOCOMOTIVES; MOTOR RAILCARS
    • B61C3/00—Electric locomotives or railcars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
    • B61F3/00—Types of bogies
    • B61F3/02—Types of bogies with more than one axle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
    • B61F5/00—Constructional details of bogies; Connections between bogies and vehicle underframes; Arrangements or devices for adjusting or allowing self-adjustment of wheel axles or bogies when rounding curves
    • B61F5/02—Arrangements permitting limited transverse relative movements between vehicle underframe or bolster and bogie; Connections between underframes and bogies
    • B61F5/04—Bolster supports or mountings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
    • B61F5/00—Constructional details of bogies; Connections between bogies and vehicle underframes; Arrangements or devices for adjusting or allowing self-adjustment of wheel axles or bogies when rounding curves
    • B61F5/02—Arrangements permitting limited transverse relative movements between vehicle underframe or bolster and bogie; Connections between underframes and bogies
    • B61F5/04—Bolster supports or mountings
    • B61F5/12—Bolster supports or mountings incorporating dampers
    • 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
    • F16H1/04—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members
    • F16H1/12—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes
    • F16H1/14—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes comprising conical gears only
    • 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
    • F16H1/04—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members
    • F16H1/12—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes
    • F16H1/18—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes the members having helical, herringbone, or like teeth
    • 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
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
    • 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
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/029—Gearboxes; Mounting gearing therein characterised by means for sealing the gearboxes, e.g. to improve airtightness
    • 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
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0467—Elements of gearings to be lubricated, cooled or heated
    • F16H57/0469—Bearings or seals
    • F16H57/0471—Bearing
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/44—Free-space packings
    • F16J15/447—Labyrinth packings

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)

Abstract

A drive device for a low-lift truck for a tram train and a low-lift truck for a tram train are disclosed. An apparatus for driving a low elevated car for a tram train according to the present invention comprises: a traction motor provided outside a bogie frame; And a speed reducer disposed outside the bogie frame and connected to the rotary shaft of the traction motor and having an input gear portion formed in a conical shape and an output gear portion engaged with the input gear portion and provided on the wheel.

Figure R1020150169451

Description

TECHNICAL FIELD [0001] The present invention relates to a driving apparatus for a low-floor truck for a tram train and a low-floor truck for a tram-

The present invention relates to a driving apparatus for a low-lift truck for a tram train and a low-lift truck for a tram train capable of improving running stability and curved road running. .

Typically, the tram train is moved along the rail. The vehicle body of the tram train is mounted on the truck, and the truck and the vehicle body are moved as the driver of the truck is driven. The tram train uses the rails of the railway car to make the connection between the city center and the suburbs. The tram train runs smoothly through a small curve section in the city center and at high speeds on the suburbs. Therefore, it is required that the tram train is installed at a low level in order to secure the curve running performance and the running stability.

BACKGROUND ART [0002] The background art of the present invention is disclosed in Korean Patent Laid-Open Publication No. 2012-0064288 (published on June 19, 2012, entitled Carrier for Transporting Power Carts).

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and provide a low-lift truck driving apparatus for a tram train and a low-lift truck for a tram train, which can improve running stability and curved road running.

An apparatus for driving a low-lift truck for a tram train according to the present invention includes: a traction motor installed outside a bogie frame; And an output gear portion disposed on the outside of the bogie frame and connected to the rotation shaft of the traction motor and formed in a conical shape and an output gear portion engaged with the input gear portion and provided on the wheel .

The input gear unit may be a driving pinion having teeth that are inclined with respect to the rotational axis of the input gear unit, and the output gear unit may be a ring gear having teeth that are inclined with respect to the rotational axis of the output gear unit.

And the rotational axis of the input gear unit may be disposed at a position lower than the rotational axis of the output gear unit.

Wherein the speed reducer is installed to surround the input gear portion and the output gear portion, and a bearing is installed so that the rotating housing of the axle can be rotated; A leakage preventing portion disposed between an inner side surface of the case and an outer side surface of the rotary housing to prevent leakage of oil discharged to the outside of the bearing to the outside of the case; And a water inflow preventing portion disposed on the outer side of the leakage preventing portion and sealing between an inner side surface of the case and an outer side surface of the rotary housing to prevent water from flowing into the case.

Wherein the leakage preventing portion includes: a first labyrinth ring closely attached to an inner surface of the case; A second labyrinth ring in contact with the outer surface of the axle and the first labyrinth ring and having a plurality of annular leak preventing ribs to be in close contact with the inner surface of the first labyrinth ring; And a third labyrinth ring for supporting the outside of the second labyrinth ring and fixedly attached to the case.

An annular elastic rib may be formed on the inner surface of the first labyrinth ring so as to be in close contact with the second labyrinth ring.

The water inflow preventing portion may be formed in an annular shape to seal between the third labyrinth ring and the outer surface of the rotary housing and may have a cross section bent so as to be in close contact with the outer surface of the third labyrinth ring and the rotary housing.

A low elevated car for a tram train according to the present invention comprises: a cargo frame in which an axle connected to a wheel is coupled and a mount portion extending downward is formed; Ballstar mounted on the mounting portion; A traction link portion coupled to the ballast and the truck frame such that the ballast flows in the truck frame; A suspension device installed between the ballast and the truck frame; A rotating device installed above the ball star and rotatably supporting the vehicle body; A traction motor installed outside the bogie frame; And a speed reducer disposed outside the bogie frame and connecting the traction motor and the wheel so as to transmit the driving force of the traction motor to the wheel.

Wherein the speed reducer is connected to a rotating shaft of the traction motor and has an input gear portion formed in a conical shape; And an output gear portion disposed perpendicularly to the rotational axis of the input gear portion and meshing with the input gear portion and provided on the wheel.

The input gear unit may be a driving pinion having teeth that are inclined with respect to the rotational axis of the input gear unit, and the output gear unit may be a ring gear having teeth that are inclined with respect to the rotational axis of the output gear unit.

And the rotational axis of the input gear unit may be disposed at a position lower than the rotational axis of the output gear unit.

Wherein the speed reducer is installed to surround the input gear portion and the output gear portion, and a bearing is installed so that the rotating housing of the axle can be rotated; A leakage preventing portion disposed between an inner side surface of the case and an outer side surface of the rotary housing to prevent leakage of oil discharged to the outside of the bearing to the outside of the case; And a water inflow preventing portion disposed on the outer side of the leakage preventing portion and sealing between an inner side surface of the case and an outer side surface of the rotary housing to prevent water from flowing into the case.

Wherein the leakage preventing portion includes: a first labyrinth ring closely attached to an inner surface of the case; A second labyrinth ring in contact with the outer surface of the rotary housing and the first labyrinth ring and having a plurality of annular oil leakage preventing ribs to be in close contact with the inner surface of the first labyrinth ring; And a third labyrinth ring for supporting the outside of the second labyrinth ring and fixedly attached to the case.

An annular elastic rib may be formed on the inner surface of the first labyrinth ring so as to be in close contact with the second labyrinth ring.

The water inflow preventing portion may be formed in an annular shape to seal between the third labyrinth ring and the outer surface of the rotary housing and may have a cross section bent so as to be in close contact with the outer surface of the third labyrinth ring and the rotary housing.

A pair of side frames disposed on both sides of the axle and on which the mount is formed; And a cross beam connecting the mounting portions of the pair of side frames.

The ball stud may be formed with a seating portion extending downward to be mounted on the mounting portion and provided with the rotating device.

A lateral buffer may be formed in the mounting portion, and a stopper may be formed on the lower side of the mounting portion so as to oppose the lateral buffer to limit a lateral movement distance of the ball star.

The wheel may be disposed on the outer side of the mount.

Wherein the suspension comprises: an elastic member disposed between the side frame and the ballast to elastically support the ballast; And a suspension damper coupled between the side frame and the ballast.

The rotating device includes: a swing bearing disposed on the ball star; A pivot block rotatably supported on the swivel bearing; And a pivot portion provided on the pivot block and on which the vehicle body is supported.

The rotating device may further include a transverse damper connecting the side frame and the pivot block.

According to the present invention, since the traction motor and the speed reducer are installed outside the bogie frame, the height of the vehicle body can be reduced. Therefore, the running stability and the turning stability of the vehicle can be improved.

Further, according to the present invention, since the driving force of the traction motor is reduced by the speed reducer and then transmitted to the axle, the driving force of the vehicle can be increased.

Further, according to the present invention, since the oil leakage preventing portion is provided in the speed reducer, it is possible to prevent oil from becoming insufficient in the speed reducer. Further, since the water inflow preventing portion is provided in the speed reducer, it is possible to prevent foreign matter from penetrating into the oil of the speed reducer.

Further, according to the present invention, since the mounting portion is formed on the side frame of the bogie frame and the seat portion is formed on the ball stud, the vehicle body can be installed lower in the low-floor bogie. Since the vehicle body is installed at a low height on the low-floor truck, the center of gravity of the tram train is lowered. Therefore, the running stability and the curve running ability of the tram train can be improved.

Further, according to the present invention, since the pivot block of the rotating device is rotatably installed on the ball star, the running stability can be improved when the tram train runs along the rail.

Further, according to the present invention, since the transverse damper buffers the lateral movement between the side frame and the pivot block, the transverse vibration of the vehicle body is attenuated and the yawing phenomenon of the vehicle body is reduced. Therefore, the turning stability of the vehicle can be improved.

1 is a perspective view showing a low elevated car for a tram train according to an embodiment of the present invention.
2 is an exploded perspective view showing a low elevated car for a tram train according to an embodiment of the present invention.
3 is a plan view showing a low elevated car for a tram train according to an embodiment of the present invention.
4 is a front view showing a mounting structure of a wheel in a low elevated car for a tram train according to an embodiment of the present invention.
5 is a perspective view showing a truck frame in a low elevated car for a tram train according to an embodiment of the present invention.
6 is a perspective view illustrating ballast in a low-lying truck for a tram train according to an embodiment of the present invention.
7 is a perspective view showing a suspension in a low elevated car for a tram train according to an embodiment of the present invention.
8 is a front view showing a suspension in a low elevated car for a tram train according to an embodiment of the present invention.
9 is a perspective view showing an installation structure of a traction link portion in a low-floor truck for a tram train according to an embodiment of the present invention.
10 is a plan view showing an installation structure of a traction link portion in a low-floor truck for a tram train according to an embodiment of the present invention.
11 is a perspective view showing a rotating device of a low-lying truck for a tram train according to an embodiment of the present invention.
12 is a rear view showing a low elevated car for a tram train according to an embodiment of the present invention.
13 is a rear view showing a stopper and a transverse buffer in a low elevated car for a tram train according to an embodiment of the present invention.
14 is a front view showing a braking device in a low-lying truck for a tram train according to an embodiment of the present invention.
15 is a plan view showing a braking device in a low elevated car for a tram train according to an embodiment of the present invention.
16 is a perspective view showing a driving apparatus in a low elevated car for a tram train according to an embodiment of the present invention.
17 is an exploded perspective view showing a state in which a case is disassembled in a driving apparatus for a low-elevated car for a tram train according to an embodiment of the present invention.
18 is a cross-sectional view showing a driving apparatus for a low elevated car for a tram train according to an embodiment of the present invention.
FIG. 19 is a front view showing an engagement structure of an input gear portion and an output gear portion in a drive device for a low-lift truck for a tram train according to an embodiment of the present invention. FIG.
FIG. 20 is an exploded perspective view showing a leakage preventing portion of a drive unit in a low elevated car for a tram train according to an embodiment of the present invention. FIG.
FIG. 21 is a perspective view showing a structure of a leakage preventing portion in a driving apparatus for a low-lift truck for a tram train according to an embodiment of the present invention. FIG.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a low elevated car for a tram train and a low elevated car for a tram train according to the present invention will be described with reference to the accompanying drawings. The thickness of the lines and the size of the components shown in the drawings in the process of describing the drive device for the low-lift truck for the tram train and the low-lift truck for the tram train may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

FIG. 1 is an exploded perspective view showing a low elevated car for a tram train according to an embodiment of the present invention, FIG. 2 is an exploded perspective view showing a low elevated car for a tram train according to an embodiment of the present invention, Fig. 4 is a front view showing an installation structure of a wheel in a low elevated car for a tram train according to an embodiment of the present invention. Fig. 4 is a plan view showing a low elevated car for a tram train according to an embodiment of the present invention.

1 to 4, a low elevated car 100 for a tram train according to an embodiment of the present invention includes a cargo frame 120, a ballast 130, a traction link 140, a suspension 150, A rotating device 160, a traction motor 170, and a speed reducer 180. [

An axle 110 connected to the wheel 112 is coupled to the bogie frame 120, and a mount 122 extending downward is formed. The wheels 112 are connected to both sides of the axle 110. An axle bracket 114 is formed on both sides of the axle 110 and an axle 110 is passed through the axle bracket 114. A spring 116 is installed on the axle bracket 114 to support the bogie frame 120. The spring 116 may be a rubber spring formed of a rubber material.

The wheel 112 is disposed on the outer side of the mount 122. The vehicle body can be prevented from interfering with the wheel 112 because the wheel 112 is disposed on the outer side of the mount portion 122. [ Further, since the installation height of the vehicle body can be lowered, the center of gravity of the tram train is lowered. Therefore, the running stability and the curve running ability of the tram train can be improved. Further, since the truck frame 120 and the like are not required to be disassembled when the wheel 112 is replaced, the maintenance performance of the wheel 112 can be improved.

FIG. 5 is a perspective view showing a bogie frame in a low elevated car for a tram train according to an embodiment of the present invention, and FIG. 6 is a perspective view showing a ballast in a low elevated car for a tram train according to an embodiment of the present invention.

5 and 6, the bogie frame 120 includes a pair of side frames 121 disposed on both sides of the axle 110 and having a mounting portion 122, a pair of side frames 121, And a cross beam 125 connecting the mounting portion 122 of the main body 110. [ The mounting portion 122 is formed in the shape of "?" From the center portion of the side frame 121 downward. Since the mounting portion 122 of the side frame 121 is connected to the cross beam 125, the height of the mounting portion 122 and the cross beam 125 is low.

The ball stud 130 is mounted on the mounting portion 122. Since the ball stud 130 is mounted on the mounting portion 122, the installation height of the ball stud 130 can be lowered. The ball stud 130 is formed with a seating part 132 extending downward to be mounted on the mounting part 122 and on which the rotating device 160 is installed. The seat portion 132 is formed in a substantially "U" shape, and both sides of the seat portion 132 are formed to be inclined outward.

FIG. 7 is a perspective view showing a suspension device in a low elevated car for a tram train according to an embodiment of the present invention, FIG. 8 is a front view showing a suspension device in a low elevated car for a tram train according to an embodiment of the present invention, FIG. 9 is a perspective view illustrating an installation structure of a traction link portion in a low-floor truck for a tram train according to an exemplary embodiment of the present invention, FIG. 10 is a perspective view illustrating an installation structure of a traction link portion in a low- Fig.

Referring to Figs. 7 to 10, the suspension 150 is installed between the ball stud 130 and the truck frame 120. At this time, the suspension device 150 is installed on both sides of the bolster 130 and the suspension seat 123 of the side frame 121. The suspension device 150 absorbs vibrations or shocks transmitted from the vehicle body to the ball stud 130.

The suspension device 150 includes an elastic member 151 disposed between the side frame 121 and the ball stud 130 so as to elastically support the ball stud 130 and a resilient member 151 disposed between the side frame 121 and the ball stud 130 And a suspension damper 153 coupled vertically. At least two elastic members 151 are provided on the suspension seat 123, and a suspension damper 153 is provided between the elastic members 151. The spring constant of the elastic member 151 is designed to meet the weight condition of the vehicle body. The elastic member 151 absorbs vibration or impact transmitted to the ball stud 130. The suspension damper 153 relaxes the vibration of the vehicle in the vertical direction.

The traction link portion 140 is coupled to the ball stud 130 and the truck frame 120 so that the ball stud 130 flows in the truck frame 120. The traction link portion 140 is connected to the inclined sides of the side frame 121 and the seating portion 132. One traction link unit 140 may be provided on the front side and the rear side of the ball star 130. The traction link unit 140 is disposed in parallel with the side frame 121 to transmit the pulling force of the low elevated car 100 to the ball star 130 and the vehicle body. Bushings 142 are provided on both sides of the traction link 140 to allow lateral displacement and vertical displacement between the bogie frames 120 and 120 and the bolster 130. The bushes 142 on both sides are connected to a coupling portion 121a formed on the bogie frame 120 and a coupling portion 131a formed on the ballast 130.

11 is a perspective view showing a rotating device of a low-lying truck for a tram train according to an embodiment of the present invention.

Referring to FIG. 11, the rotating device 160 is installed above the ball stud 130, and rotatably supports the vehicle body. Since the rotating device 160 rotatably supports the vehicle body, the vehicle body can be slightly rotated at the ball star 130 when the tram train travels in the curve section.

The rotating device 160 includes a pivot block 161 disposed on the upper side of the ball stud 130, a pivot block 163 rotatably supported on the pivot bearing 161, And a pivot portion 165 to which the vehicle body is supported. The pivot portion 165 is pushed into the pivot block 163 and the pivot block 163 is rotatably installed in the pivot bearing 161. Therefore, when the vehicle body is rotated relative to the ball stud 130, the pivot block 163 is rotated by the pivot bearing 161.

FIG. 12 is a rear view showing a low elevated car for a tram train according to an embodiment of the present invention, and FIG. 13 is a rear elevation showing a stopper and a transverse buffer in a low elevated car for a tram train according to an embodiment of the present invention .

12 and 13, a transverse buffer 124 is formed on the inside of the mounting portion 122 and a transverse buffer 124 is provided on the lower side of the mounting portion 132 so as to face the transverse buffer 124, A stopper 133 is formed to limit the distance. The lateral buffer 124 and the stopper 133 are spaced about 10-15 mm apart. The lateral movement of the bolster 130 by the stopper 133 is restricted by the transverse buffer 124 so that the bolster 130 can appropriately open or flow in the lateral direction.

The driving devices 170 and 180 are coupled to the outside of the truck frame 120, and rotate the wheels 112. The drive devices 170 and 180 are installed on the wheels 112 on both sides of the truck frame 120, respectively. The driving devices 170 and 180 are fixed to the side frame 121 of the truck frame 120 through a fixing bracket 175. The driving devices 170 and 180 and the side frame 121 are connected by a torque link 173. The driving devices 170 and 180 will be described in detail below.

The low elevated car 100 for a tram train further includes a transverse damper 167 connecting the side frame 121 and the pivot block 163. The transverse damper 167 is installed side by side with the cross beam 125. One lateral damper 167 may be provided on the front side and the rear side of the pivot block 163. The transverse damper 167 relaxes lateral movement between the side frame 121 and the pivot block 163, thereby attenuating lateral vibration of the vehicle body and reducing yawing of the vehicle body. Therefore, the turning stability of the vehicle can be improved.

FIG. 14 is a front view showing a braking device in a low elevated car for a tram train according to an embodiment of the present invention, and FIG. 15 is a plan view showing a braking device in a low elevated car for a tram train according to an embodiment of the present invention.

Referring to Figs. 14 and 15, a braking device 190 is installed so that the wheel 112 can be braked. The braking device 190 includes a disk 191 and a caliper 195. A braking shaft 192 is formed at the center of the disk 191 so as to be pressed into the end of the axle 110. The disc 191 is rotated together with the wheel 112. [ A friction pad 196 is provided on the caliper 195 so as to be opposed to both sides of the disk 191. The friction pad 196 rubs against the disc 191 to brake the wheel 112. [

FIG. 16 is a perspective view showing a driving apparatus in a low-floor car for a tram train according to an embodiment of the present invention, FIG. 17 is a perspective view of a driving apparatus for a low- 18 is a cross-sectional view showing a driving apparatus for a low-elevated car for a tram train according to an embodiment of the present invention, and Fig. 19 is a sectional view showing the driving of a low elevated car for a tram train according to an embodiment of the present invention. Fig. 2 is a front view showing the engagement structure of the input gear portion and the output gear portion in the device.

Referring to Figs. 16 to 19, the driving devices 170 and 180 include a traction motor 170 and a speed reducer 180. Fig.

The traction motor 170 is installed outside the bogie frame 120. Since the traction motor 170 is disposed outside the bogie frame 120, it is possible to prevent the traction motor 170 from interfering with the vehicle body. Accordingly, since the center of gravity of the drum train can be lowered as the height of the vehicle body is lowered, the running stability and the curve running ability of the vehicle can be improved.

The speed reducer 180 is disposed outside the bogie frame 120 and connects the traction motor 170 and the wheel 112 to transmit the driving force of the traction motor 170 to the wheel 112. [ The decelerator 180 decelerates the rotation speed of the traction motor 170, so that the driving torque of the wheel 112 can be increased. Further, since the speed reducer 180 is disposed outside the bogie frame 120, the height of the vehicle body can be reduced.

The speed reducer 180 includes an input gear portion 181 and an output gear portion 182. The input gear portion 181 is connected to the rotary shaft of the traction motor 170 and is formed in a conical shape. The output gear portion 182 is disposed perpendicularly to the rotational axis of the input gear portion 181 and meshes with the input gear portion 181 and is provided on the wheel 112. Since the rotation axis of the input gear portion 181 is perpendicular to the rotation axis of the output gear portion 182, the power can be transmitted from the outside of the bogie frame 120 to the axle.

The input gear portion 181 is a driving pinion that is inclined with respect to the rotational axis of the input gear portion 181 and the output gear portion 182 is a driving pinion inclined with respect to the rotational axis of the output gear portion 182 And is a ring gear in which teeth are formed. As the drive pinion is rotated by the traction motor 170, the ring gear is rotated.

The rotational axis of the input gear portion 181 is disposed at a position L which is lower than the rotational axis of the output gear portion 182 because the drive pinion and the ring gear are inclined. Since the rotational axis of the input gear portion 181 is disposed lower than the rotational axis of the output gear portion 182, the height of the tram train can be reduced. The center of gravity of the vehicle body is lowered, so that the running stability and the curve running ability of the vehicle can be improved.

FIG. 20 is an exploded perspective view showing a leakage preventing portion of a driving apparatus in a low-floor truck for a tram train according to an embodiment of the present invention. FIG. And Fig.

Referring to Figs. 20 and 21, the speed reducer 180 includes a case 183, a leakage preventing portion 185, and a moisture inflow preventing portion 189. Fig.

The case 183 is provided so as to surround the input gear portion 181 and the output gear portion 182. A bearing 184a is installed inside the case 183 so that the rotating housing 184 of the axle can be rotated.

The oil leakage preventing portion 185 is disposed between the inner side surface of the case 183 and the outer side surface of the rotary housing 184 and prevents the oil discharged to the outside of the bearing 184a from leaking to the outside of the case 183 do. The oil leakage preventing portion 185 prevents the leakage of the oil from the oil case 183, thereby making it possible to prevent the oil in the reduction gear 180 from becoming insufficient.

The leakage preventing portion 185 includes a first labyrinth ring 186, a second labyrinth ring 187, and a third labyrinth ring 188.

The first labyrinth ring 186 is in close contact with the inner surface of the case 183. The first labyrinth ring 186 is formed annularly along the inner circumferential direction of the case 183. An annular elastic rib 186a is formed on the inner surface of the first labyrinth ring 186 so as to be in close contact with the second labyrinth ring 187. Therefore, the gap between the first labyrinth ring 186 and the second labyrinth ring 187 can be sealed by the elastic ribs 186a.

The second labyrinth ring 187 is in close contact with the outer surface of the rotary housing 184 and the first labyrinth ring 186. The second labyrinth ring 187 is formed annularly to surround the rotating housing 184. A plurality of annular leak-proof ribs 187a are formed in the second labyrinth ring 187 so as to be in close contact with the inner surface of the first labyrinth ring 186. The gap between the first labyrinth ring 186 and the second labyrinth ring 187 is formed to be in contact with the inner surface of the first labyrinth ring 186 by the leakage preventing ribs 187a, Lt; / RTI >

The third labyrinth ring 188 supports the outside of the second labyrinth ring 187 and is tightly fixed to the case 183. The third labyrinth ring 188 is annularly formed along the inner circumference of the case 183. The third labyrinth ring 188 is fixed to the case 183 by a fastening member such as a bolt. The third labyrinth ring 188 supports the outer side of the second labyrinth ring 187 to help maintain the second labyrinth ring 187 in intimate contact with the first labyrinth ring 186.

Since the first labyrinth ring 186, the second labyrinth ring 187 and the third labyrinth ring 188 are coupled to each other and the elastic ribs 186a and the oil leakage preventing ribs 187a are formed in the gaps, And the rotation housing 184 is complicated. Therefore, it is possible to prevent the oil from leaking through the gap between the case 183 and the rotating housing 184. [

The water inflow preventing portion 189 is disposed on the outer side of the oil leakage preventing portion 185 and has an inner side surface of the case 183 and an outer side surface of the rotating housing 184 to prevent moisture from flowing into the case 183. [ Respectively. Therefore, it is possible to prevent impurities such as moisture from permeating the speed reducer 180, and to prevent the oil from being diluted or contaminated.

The water inflow preventing portion 189 is formed in an annular shape to seal between the third labyrinth ring 188 and the outer surface of the rotary housing 184. The water inflow preventing portion 189 has a cross-section in a bent shape so as to be in close contact with the outer surface of the third labyrinth ring 188 and the rotary housing 184. The sealing performance between the third labyrinth ring 188 and the rotating housing 184 can be improved since the cross section of the moisture inflow preventing portion 189 is formed to be bent.

Hereinafter, the operation of the low elevated car for a tram train according to one embodiment of the present invention will be described.

The input gear portion 181 and the output gear portion 182 are engaged and rotated as the traction motor 170 is driven. The wheel 112 is rotated as the output gear portion 182 is rotated and the low elevated car 100 travels along the rail as the wheel 112 is rotated. The traction link unit 140 is connected to the side frame 121 and the ball stud 130 so that the traction force of the low elevator car 100 is transmitted to the ball stud 130 and the vehicle body. Therefore, the low elevated car 100 and the vehicle body are operated together.

The traction motor 170 is driven at low speed when traveling in the city center, and at high speed when traveling in the out-of-area. Therefore, the vehicle can be operated at a low speed when the vehicle is running in the city center, and at a high speed when the vehicle is running in the suburbs.

A mounting portion 122 is formed on the side frame 121 of the bogie frame 120 and a seat portion 132 is formed on the ball stud 130 so that the vehicle body is installed lower in the low- Since the vehicle body is installed at a low height on the low elevation carriage 100, the center of gravity of the vehicle body is lowered. Therefore, the running stability and the curve running ability of the tram train can be improved.

Further, since the wheel 112 is disposed on the outer side of the mount portion 122, interference with the wheel 112 when the vehicle body is seated on the ball stud 130 can be prevented. Further, since the installation height of the vehicle body can be lowered, the center of gravity of the tram train is lowered. Therefore, the running stability and the curve running ability of the tram train can be improved. Further, since the truck frame 120 and the like are not required to be disassembled when the wheel 112 is replaced, the maintenance performance of the wheel 112 can be improved.

When the heights of the two side rails are different, the body of the tram train can be slightly tilted at the ball stud 130. At this time, since the pivot block 163 of the rotating device 160 is rotated by the ball bearing 130 by the swing bearing 161, the running stability can be improved when the tram train travels along the rails.

Further, since the transverse damper 167 buffers the lateral movement between the side frame 121 and the pivot block 163, the transverse vibration of the vehicle body is attenuated and the yawing phenomenon of the vehicle body is reduced. Therefore, the turning stability of the vehicle can be improved.

Since the horizontal movement distance of the bolster 130 is limited by the lateral buffer 124 by the stopper 133, the bolster 130 can be appropriately spaced or moved in the lateral direction. Therefore, the lateral fluidity of the vehicle body can be limited by the stopper 133 and the transverse buffer 124. [

In addition, since the traction motor 170 and the speed reducer 180 are provided outside the bogie frame 120, the height of the vehicle body can be reduced. Therefore, the running stability and the turning stability of the vehicle can be improved.

Further, since the driving force of the traction motor 170 is reduced by the speed reducer 180 and then transmitted to the axle, the driving force of the vehicle can be increased.

In addition, since the oil leakage preventing portion 185 is provided in the speed reducer 180, it is possible to prevent the oil in the speed reducer 180 from becoming insufficient. Further, since the water inflow preventing portion 189 is provided in the speed reducer 180, it is possible to prevent foreign matter from penetrating into the oil of the speed reducer 180.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand.

Accordingly, the true scope of protection of the present invention should be defined by the claims.

100: Lower floor truck 110: Axle
112: wheel 114: axle bracket
116: spring 120: bogie frame
121: side frame 122:
125: Cross beam 130: Ballast
132: seat part 133: stopper
140: Traction link section 142: Bush
150: Suspension device 151: Elastic member
153: suspension damper 160: rotating device
161: turning bearing 163: pivot block
165: pivot portion 167: transverse damper
170: Traction motor 180: Reduction gear
181: Input gear portion 182: Output gear portion
183: Case 184: Rotating housing
185: leakage preventing portion 186: first labyrinth ring
186a: elastic rib 187: second labyrinth ring
187a: Oil leakage prevention rib 188: Third labyrinth ring
190: Brake device 191: Disk
192: motor shaft 195: caliper
196: Friction pad

Claims (22)

A traction motor installed outside the bogie frame; And
An input gear portion disposed outside the bogie frame and connected to a rotary shaft of the traction motor and formed in a conical shape; and a speed reducer having an output gear portion engaged with the input gear portion and provided on the wheel,
The speed reducer includes:
A case installed to surround the input gear portion and the output gear portion and provided with a bearing for rotating the rotating housing of the axle;
A leakage preventing portion disposed between an inner side surface of the case and an outer side surface of the rotary housing to prevent leakage of oil discharged to the outside of the bearing to the outside of the case; And
And a water inflow preventing portion disposed on an outer side of the leakage preventing portion to seal between an inner side surface of the case and an outer side surface of the rotary housing to prevent moisture from flowing into the case,
The leakage preventing portion
A first labyrinth ring which is in close contact with an inner surface of the case;
A second labyrinth ring in contact with the outer surface of the axle and the first labyrinth ring and having a plurality of annular leak preventing ribs to be in close contact with the inner surface of the first labyrinth ring; And
And a third labyrinth ring for supporting the outside of the second labyrinth ring and being tightly fixed to the case.
The method according to claim 1,
Wherein the input gear portion is a driving pinion having teeth formed in an inclined shape with respect to a rotation axis of the input gear portion,
Wherein the output gear portion is a ring gear having teeth formed in an inclined shape with respect to a rotation axis of the output gear portion.
3. The method of claim 2,
Wherein the rotary shaft of the input gear unit is disposed at a lower position than the rotary shaft of the output gear unit.
delete delete The method according to claim 1,
And an annular resilient rib is formed on an inner surface of the first labyrinth ring so as to be in close contact with the second labyrinth ring.
The method according to claim 1,
The water inflow preventing portion is formed in an annular shape to seal between the third labyrinth ring and the outer surface of the rotary housing and has a cross section bent to be in close contact with the outer surface of the third labyrinth ring and the rotary housing. Wherein the low-tramcar for the tram-train is driven.
A bogie frame to which an axle connected to the wheel is coupled and in which a mount portion extending downward is formed;
Ballstar mounted on the mounting portion;
A traction link portion coupled to the ballast and the truck frame such that the ballast flows in the truck frame;
A suspension device installed between the ballast and the truck frame;
A rotating device installed above the ball star and rotatably supporting the vehicle body;
A traction motor installed outside the bogie frame; And
And a speed reducer disposed outside the bogie frame and connecting the traction motor and the wheel so as to transmit the driving force of the traction motor to the wheel,
The speed reducer includes:
An input gear portion connected to a rotating shaft of the traction motor and formed in a conical shape; And
And an output gear portion disposed perpendicularly to the rotational axis of the input gear portion and engaged with the input gear portion and provided on the wheel,
The speed reducer includes:
A case installed to surround the input gear portion and the output gear portion and provided with a bearing for rotating the rotating housing of the axle;
A leakage preventing portion disposed between an inner side surface of the case and an outer side surface of the rotary housing to prevent leakage of oil discharged to the outside of the bearing to the outside of the case; And
And a water inflow preventing portion disposed outside the leakage preventing portion to seal between an inner side surface of the case and an outer side surface of the rotary housing to prevent moisture from flowing into the case,
The leakage preventing portion
A first labyrinth ring which is in close contact with an inner surface of the case;
A second labyrinth ring in contact with the outer surface of the rotary housing and the first labyrinth ring and having a plurality of annular oil leakage preventing ribs to be in close contact with the inner surface of the first labyrinth ring; And
And a third labyrinth ring for supporting the outside of the second labyrinth ring and being tightly fixed to the case.
delete 9. The method of claim 8,
Wherein the input gear portion is a driving pinion having teeth formed in an inclined shape with respect to a rotation axis of the input gear portion,
Wherein the output gear portion is a ring gear having teeth formed in an inclined shape with respect to a rotation axis of the output gear portion.
11. The method of claim 10,
Wherein the rotary shaft of the input gear unit is disposed at a lower position than the rotary shaft of the output gear unit.
delete delete 9. The method of claim 8,
And an annular resilient rib is formed on an inner surface of the first labyrinth ring so as to be in close contact with the second labyrinth ring.
9. The method of claim 8,
The water inflow preventing portion is formed in an annular shape to seal between the third labyrinth ring and the outer surface of the rotary housing and has a cross section bent to be in close contact with the outer surface of the third labyrinth ring and the rotary housing. Low-floor trucks for tram trains.
9. The method of claim 8,
Wherein the bogie frame comprises:
A pair of side frames disposed on both sides of the axle and on which the mount is formed; And
And a cross beam connecting the mounting portions of the pair of side frames.
17. The method of claim 16,
Wherein the bolster is formed with a seating portion extending downward to be mounted on the mounting portion and on which the rotating device is mounted.
18. The method of claim 17,
A transverse buffer is formed in the mounting portion,
And a stopper is formed at a lower side of the seat portion so as to face the transverse buffer and to limit a lateral movement distance of the ball star.
18. The method of claim 17,
And the wheel is disposed on the outer side of the mount portion.
17. The method of claim 16,
The suspension device includes:
An elastic member disposed between the side frame and the ball screw to elastically support the ball screw; And
And a suspension damper coupled between the side frame and the ballast.
17. The method of claim 16,
The rotating device includes:
A swivel bearing disposed above the ball star;
A pivot block rotatably supported on the swivel bearing; And
And a pivot portion provided on the pivot block and on which the vehicle body is supported.
22. The method of claim 21,
Further comprising a transverse damper connecting the side frame and the pivot block.
KR1020150169451A 2015-11-30 2015-11-30 Driving apparatus of low floor bogie for tram train and low floor bogie for tram train KR101759606B1 (en)

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KR1020150169451A KR101759606B1 (en) 2015-11-30 2015-11-30 Driving apparatus of low floor bogie for tram train and low floor bogie for tram train

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KR1020150169451A KR101759606B1 (en) 2015-11-30 2015-11-30 Driving apparatus of low floor bogie for tram train and low floor bogie for tram train

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005273793A (en) * 2004-03-25 2005-10-06 Hitachi Nico Transmission Co Ltd Drive device of diesel-driven vehicle
KR101344205B1 (en) * 2012-11-28 2013-12-20 현대다이모스(주) Train reduction equipment having structure for preventing indraft of snow
JP2014073748A (en) * 2012-10-04 2014-04-24 Hitachi Ltd Truck for railway vehicle

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005273793A (en) * 2004-03-25 2005-10-06 Hitachi Nico Transmission Co Ltd Drive device of diesel-driven vehicle
JP2014073748A (en) * 2012-10-04 2014-04-24 Hitachi Ltd Truck for railway vehicle
KR101344205B1 (en) * 2012-11-28 2013-12-20 현대다이모스(주) Train reduction equipment having structure for preventing indraft of snow

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