KR101701389B1 - Apparatus for charging yard tractor - Google Patents

Abstract

According to an embodiment of the present invention, a yard tractor charging facility includes a pair of supply terminals installed in a designated charging area to supply power; and a pair of guide rails disposed on the outside of the supply terminals, respectively, and restricting the movement of the wheels of a yard tractor so that the yard tractor is not separated from the charging area. The supply terminal is parallel to the movement direction of the yard tractor, has opened front and rear ends, and has a charging space into which the input terminal of the yard tractor is inserted. So, the power can be easily supplied to the yard tractor.

Description

[0001] APPARATUS FOR CHARGING YARD TRACTOR [0002]

Field of the Invention [0002] The present invention relates to a yard tractor charging facility, and more particularly, to a facility capable of charging a yard tractor in a contact manner.

Container terminals provided on the shore of the harbor for the unloading of containers are bases where marine transportation by vessels and land transportation by trucks and trains are connected. These include container ships' berthing facilities, container loading and unloading facilities, containers Warehouses, and warehouses, to ensure smooth container logistics, and is linked to land transportation including roads and railways.

In order to smoothly carry out the container logistics smoothly in the port, a system for efficiently managing the entire container terminal must be provided, and the related facilities such as ship yard facilities, container loading and unloading facilities, container yards and warehouse facilities are sufficient It is important to secure it.

With respect to landing / lifting of the container, the gantry crane installed in the container terminal or the like is a port-type or bridge-type port cranes, which is referred to as a yard tractor or yard trailer ), Or used to build a yarded container into a yard tractor.

1 is a view schematically showing the structure of a container terminal system formed in a port. 1, when the cargo ship 1000 carrying the container cargo arrives at the port, the container is primarily unloaded by the container crane 2000 installed in the port, and the unloaded container is moved to the yard tractor yard tractor, and the gantry crane 3000 is moved to the field zone and moved. Conversely, shipping the container carried by the yard tractor to the cargo ship 1000 is the same as above, except that the work process is reversed.

The yard tractor traps the yard chassis within the container terminal and transports the container between the yard and the container yard. The yard trailer typically travels at a low speed of about 50 km / hr or less, A high-output engine with high acceleration is used.

As described in FIG. 1, the yard tractor is only required to move the areas of the container loading areas A, B, C, D shown in FIG. 1 due to the special use used in the container yard.

Korean Unexamined Patent Application Publication No. 2011-0058576 (June 1, 2011)

It is an object of the present invention to provide a yard tractor charging facility capable of easily supplying power to a yard tractor.

Other objects of the present invention will become more apparent from the following detailed description and the accompanying drawings.

According to an embodiment of the present invention, a yard tractor charging facility includes a pair of supply terminals installed in a designated charging area to supply power; And a pair of guide rails disposed on the outside of the supply terminal and restricting movement of the wheels of the yard tractor so that the yard tractor does not separate from the charging area, And has a filling space into which the input terminal of the yard tractor is inserted.

The supply terminal may be symmetrical with respect to a virtual center line parallel to the moving direction of the yard tractor.

The filling space has an inlet space through which the input terminal enters and an outlet space through which the input terminal escapes in response to movement of the yard tractor, and the width of the inlet space may be larger than the width of the outlet space.

The yard tractor charging facility includes a charging pad having the supply terminal fixed to the upper surface thereof; And an elastic member positioned below the filling pad to provide an elastic force to the filling pad.

Wherein the yard tractor charging facility further comprises a controller electrically connected to the supply terminal, wherein the controller has a supply mode for supplying power to the supply terminal and a standby mode for shutting off the power supplied to the supply terminal, The controller can be switched to the supply mode and the standby mode according to the pressure applied to the charging pad.

The yard tractor charging facility includes: a sensor for sensing the yard tractor; And a controller electrically connected to the supply terminal and the sensor, wherein the controller has a supply mode for supplying power to the supply terminal and a standby mode for shutting off the power supplied to the supply terminal, May be switched to the supply mode and the standby mode depending on whether the yard tractor is detected.

The guide rail includes a guard rail arranged parallel to a moving direction of the yard tractor; And an induction rail extending outwardly from the guard rail to form an inlet through which the yard tractor enters the charging zone.

According to an embodiment of the present invention, power can be easily supplied to the yard tractor by installing a supply terminal in the loading zone and supplying power through the supply terminal. In addition, when the battery of the yard tractor is charged while the vehicle is stationary in the loading area, the time required for charging can be minimized.

2 is a view schematically showing the appearance of a yard tractor for a harbor according to an embodiment of the present invention.
3 is a block diagram illustrating a current-collecting unit according to an embodiment of the present invention.
4 is a perspective view schematically showing a charging facility according to an embodiment of the present invention.
Fig. 5 is a view schematically showing the filling pad shown in Fig. 4. Fig.
Fig. 6 is a view schematically showing the supply terminal shown in Fig. 4. Fig.
Fig. 7 is a view schematically showing the guide rail shown in Fig. 4. Fig.
Fig. 8 is a block diagram showing a controller electrically connected to the supply terminal shown in Fig. 4; Fig.
FIGS. 9 and 10 are views showing a process of connecting the input terminal and the supply terminal of the yard tractor shown in FIG.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to FIGS. 2 to 10. The embodiments of the present invention can be modified in various forms, and the scope of the present invention should not be construed as being limited to the embodiments described below. The embodiments are provided to explain the present invention to a person having ordinary skill in the art to which the present invention belongs. Accordingly, the shape of each element shown in the drawings may be exaggerated to emphasize a clearer description.

2 is a view schematically showing the appearance of a yard tractor for a harbor according to an embodiment of the present invention. The yard tractor 200 has a conventional tractor shape and a yard chassis or yard trailer 290 is coupled to the yard tractor 200 and a container 291 is loaded on the yard chassis or yard trailer 290, The container 291 is unloaded from the yard trailer 290.

The yard tractor 200 is powered by a contact power supply system. As will be described later, the contact power supply system is a system in which the input terminal 113 of the yard tractor 200 is in contact with the supply terminal of the charging facility to receive power. The power collection unit 210 is directly supplied with power through a supply terminal to be described later.

3 is a block diagram schematically showing a current collecting unit according to an embodiment of the present invention. 3, the current collecting unit 210 includes an input terminal 113 to which power is supplied from a supply terminal, and a motor 112 that operates with a load, And a collecting drive unit 111 for collecting the collected light. The power collecting drive unit 111 stabilizes the power supply and supplies the power to the motor drive power source.

The AC power is converted to a DC power via the regulator 111a and supplied to the load through a power conversion unit 111e for matching the DC power with the operating voltage of the motor 112 operating as a load.

In this case, when the motor used as the load is a three-phase AC motor using alternating current, the power converting unit 111e may be an inverter that converts DC power to AC power again. If the motor is a DC motor, A means such as a chopper can be used. That is, the power conversion unit 111e may be changed according to the used load condition. In this embodiment, the motor 112 employs a three-phase AC motor and uses an inverter as the power conversion unit 111e.

3, the power collecting unit 111e of the power collecting unit 110 installed in the yard tractor 100 according to an embodiment of the present invention includes a power converting unit 111e and a regulator (not shown) And a lithium-ion battery 111b between the lithium-ion battery 111a and the lithium-ion battery 111b. The lithium-ion battery 111b is configured to be chargeable, and supplies power to the motor 112 together with the regulator 111a.

As described above, the selection of the charging capacity of the lithium-ion battery should be selected in consideration of economical efficiency and efficiency. In the present invention, the yard tractor 100 moving in a certain working area of the container station uses a relatively small capacity battery . That is, when the yard tractor 100 moves out of the supply terminal and moves to a place such as a container yard, power is supplied to the motor from the charged battery.

In addition, the yard tractor 100 according to an embodiment of the present invention includes a battery management system (BMS) circuit for preventing the lithium-ion battery 111b from falling below a predetermined voltage, The lithium-ion battery 111b can be stably maintained.

In the yard tractor 100 according to an embodiment of the present invention, the stabilizing unit 111 of the current collector 110 includes a DC-DC converter between the lithium-ion battery 111b and the power converter 111e So that power can be stably supplied to the electronic device 111f necessary for the tractor 100 other than the motor 112, for example, a controller necessary for controlling the tractor.

4 is a perspective view schematically showing a charging facility according to an embodiment of the present invention. Since the charging facility shown in FIG. 4 is installed in the loading area of A, B, C, and D described above, charging can be performed through the charging facility while the yard tractor 200 is stopped. Therefore, the additional time required for charging can be minimized, and the loading zone corresponds to the charging zone in which the charging facility is installed.

As shown in FIG. 4, the charging apparatus has a charging pad 380, and supply terminals 340 and 360 are installed on the upper surface of the charging pad 380. Fig. 5 is a view schematically showing the filling pad shown in Fig. 4. Fig. The filling pad 380 is a flat plate of a rectangular parallelepiped. The supporting shafts 391 and 393 protrude from the lower surface of the filling pad 380 and the elastic body E is provided on the supporting shafts 391 and 393 to elastically support the filling pad 380.

The filling pad 380 has an upper surface 382 and sloped surfaces 381 and 383 located on both sides of the upper surface and the upper surface 382 and the sloped surfaces 381 and 383 are located on opposite sides of the yard tractor 200 Direction. When the yard tractor 200 is moved to the charging zone (or the loading zone), the input terminals 240 and 260 are moved to the upper portion of the charging pad 380 by the movement of the yard tractor 200, The upper surface 382 can be moved by sliding while the lower end thereof is in contact with the rear inclined surface 381. When the yard tractor 200 is released from the charging zone (or the loading zone), the lower ends of the input terminals 240 and 260 can be slid and moved to the forward slope 383 while being in contact with the upper surface 382 , And then completely disengage from the charging pad 380.

The charging pad 380 can be pressed by the lower ends of the input terminals 240 and 260 and the lower ends of the input terminals 240 and 260 can be pressed against the rear inclined surface 381, The elastic body E is compressed and separated from the filling pad 380 via the forward inclined surface 383 while the filling pad 380 is moved downward in contact with the upper surface 382 via the front surface 382. [ The charging pad 380 is moved upward.

Fig. 6 is a view schematically showing the supply terminal shown in Fig. 4. Fig. As described above, the supply terminals 340 and 360 are provided on the upper surface of the charging pad 380, and one of them may be a positive (+) and the other may be a negative (-). 6, the supply terminal 340 has a pair of terminal pads 342 and 344, and the terminal pads 342 and 344 are symmetrical with respect to a virtual center line (dot-dash line shown in Fig. 6) (The supply terminal 360 has the same structure and function as the supply terminal 340).

The terminal pads 342 and 344 are spaced apart from each other to form a filling space 340a therebetween. The charging space 340a has an inlet side and an outlet side according to the moving direction of the yard tractor 200. The inlet side and the outlet side are opened so that the input terminals 240 and 260 enter the charging space 340a through the inlet side, The charging space 340a can be separated from the charging space 340a. Since the inlet side width d1 of the charging space 340a is larger than the outlet side width d2, the input terminals 240 and 260 can easily enter the charging space 340a.

Fig. 7 is a view schematically showing the guide rail shown in Fig. 4. Fig. As shown in Fig. 4, the guide rails 320 and 330 are disposed outside the filling pad 380, respectively, and have a bar shape. The guide rails 320 and 330 limit the movement of the wheels 242 and 262 of the yard tractor 200 to help the yard tractor 200 enter the correct charging area and allow the input terminals 240 and 260 to enter the charging space precisely (On the contrary, to prevent departure from the charging zone).

The guide rails 320 and 330 include guard rails 324 and 334 and guide rails 322 and 332. The guard rails 324 and 334 are disposed in parallel with the entry direction of the yard tractor 200 and are located close to the outside of the wheels of the yard tractor 200 entering the charging area. Guard rails 324 and 334 limit the wheels from leaving the charging area. The guide rails 322 and 332 are located behind the guard rails 324 and 334 and extend from the guard rails 324 and 334 and are inclined outward toward the rear. The yard tractor 200 can be guided through the guide rails 322 and 332 to the correct position of the charging station and the guide rails 322 and 332 can be moved to the inside of the guard rails 324 and 334 by limiting the wheels of the yard tractor 200 .

Fig. 8 is a block diagram showing a controller electrically connected to the supply terminal shown in Fig. 4; Fig. The controller 400 is electrically connected to the supply terminals 340 and 360 and supplies power to the supply terminals 340 and 360 (the 'supply mode') and cuts off the power supplied to the supply terminals 340 and 360 ). The controller 400 senses the pressure applied to the charging pad 380 or the displacement of the charging pad 380 through a sensor (for example, a pressure sensor or a displacement sensor) provided on the charging pad 380, Mode or standby mode (switch to supply mode if pressure or displacement does not change within a certain range and switch to standby mode if pressure or displacement changes within a certain range).

The sensors are installed on the supply terminals 340 and 360 so that the input terminals 240 and 260 enter the side where the input terminals 240 and 260 pass through the inlet side of the supply terminals 340 and 360. If the input terminals 240 and 260 enter ' (Switched to contact with supply terminals 340 and 360). In addition, the sensor may be located at one side of the charging zone to sense whether the yard tractor 200 has entered the charging zone precisely. Further, the sensor can sense the moving speed of the yard tractor 200 (or input terminals 240 and 260).

The controller 400 operates in the feed mode when the yard tractor 200 (or input terminals 240 and 260) through the sensor has precisely entered and stopped in the charging zone and the yard tractor 200 (or input terminals 240 and 260) Can be operated in the standby mode when the mobile terminal moves away from the charging zone or moves. When the yard tractor 200 (or the input terminals 240 and 260) moves in a state where power is supplied to the supply terminals 340 and 360, arcing is generated due to friction between the supply terminals 340 and 360 and the input terminals 240 and 260 The situation can be caused.

FIGS. 9 and 10 are views showing a process of connecting the input terminal and the supply terminal of the yard tractor shown in FIG. Hereinafter, the charging method of the yard tractor 200 will be described with reference to FIGS. 9 and 10. FIG.

9, the wheels 242 and 262 of the yard tractor 200 can be guided by the guide rails 322 and 332 and move to the inside of the guard rails 324 and 334, and can accurately enter the charging area. The yard tractor 200 has a body frame 220, and the wheels 242 and 262 are connected to the body frame 220 via a support shaft or the like.

The yard tractor 200 has a pair of input terminals 240 and 260 connected to the body frame 220. The input terminals 240 and 260 are connected to the upper part of the charging pad 380 To contact the supply terminals 340 and 360 and the yard tractor 200 stops. At this time, the controller 400 operates in a supply mode to supply power to the supply terminals 340 and 360.

Thereafter, when the yard tractor 200 leaves the charging zone (or loading zone), the lower ends of the input terminals 240 and 260 leave the charging pad 380. At this time, the controller 400 operates in the cutoff mode to cut off the power supplied to the supply terminals 340 and 360.

As described above, since charging can be performed during a work in a state where the yard tractor 200 is stopped in the charging space (or the loading space), the additional time required for charging can be minimized. Particularly, since power can be supplied / cut off through the movement of the charging pad 380, standby power can be minimized.

Although the present invention has been described in detail by way of preferred embodiments thereof, other forms of embodiment are possible. Therefore, the technical idea and scope of the claims set forth below are not limited to the preferred embodiments.

110: power collecting unit
111: Collecting drive unit
112: motor
113: Input terminal
200: Yard Tractor
220: Body frame
240,260: Input terminal
320,330: Guide rail
340,360: Supply terminal
380: Charging Pad
400: controller

Claims (7)

A pair of supply terminals installed in the designated charging area to supply power;
A charging pad having an upper surface on which the supply terminal is fixed and a rear inclined surface inclined downward from the upper surface in a rearward direction;
An elastic member positioned below the filling pad to provide an elastic force to the filling pad;
A pair of guide rails disposed outside the supply terminal, respectively, for limiting movement of the wheels of the yard tractor so that the yard tractor does not depart from the charging zone; And
And a controller electrically connected to the supply terminal,
Wherein the supply terminal has a charging space in which a front end and a rear end of the supply terminal are parallel to a moving direction of the yard tractor and an input terminal of the yard tractor is inserted,
The charging pad is pressed by sliding on the upper surface of the charging pad while the lower end of the input terminal of the yard tractor is in contact with the rear inclined surface when the yard tractor is moved to the charging space,
Wherein the controller has a supply mode for supplying power to the supply terminal and a standby mode for shutting off the power supplied to the supply terminal,
Wherein the controller is switched to the supply mode and the standby mode according to a pressure applied to the charge pad. The method according to claim 1,
Wherein the supply terminal is symmetrical with respect to a virtual center line parallel to the moving direction of the yard tractor. The method according to claim 1,
Wherein the charging space has an entrance space through which the input terminal enters and an exit space through which the input terminal escapes in accordance with movement of the yard tractor,
Wherein the width of the inlet space is greater than the width of the outlet space. delete delete The method according to claim 1,
The yard tractor charging facility comprises:
A sensor for sensing the yard tractor; And
And a controller electrically connected to the supply terminal and the sensor,
Wherein the controller has a supply mode for supplying power to the supply terminal and a standby mode for shutting off the power supplied to the supply terminal,
Wherein the controller switches to the supply mode and the standby mode depending on whether the yard tractor is sensed. The method according to claim 1,
The guide rails
A guard rail arranged parallel to a moving direction of the yard tractor; And
And an induction rail extending obliquely outwardly from the guard rail to define an inlet through which the yard tractor enters the charging zone.

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