JP7148342B2 - Electric vehicle power supply system - Google Patents

Description

TECHNICAL FIELD The present invention relates to a power supply system for an electric vehicle that supplies power to an electric vehicle running on a trackless road surface so that current flows between a pair of first and second power supply lines to an electric motor mounted on the electric vehicle.

Conventionally, this type of power supply system includes a two-pole power supply line for feeding positive and negative two-pole direct current or single-phase alternating current so as to flow to an electric motor mounted on an electric vehicle, and two current collectors such as a pantograph provided in an electric vehicle. As an example, a power supply system for an electrically driven dump truck (electric vehicle) described in Patent Document 1 below includes two left and right trolley wires (a pair of first and second power supply line), two current collectors (current collectors) having a contact strip that can be slidably contacted from below on each power supply line, a power supply line detection device such as a camera that detects the power supply line from below while the vehicle is running, and a control device that imparts a yaw moment to the electric vehicle so that the electric vehicle runs following the power supply line based on information detected by the power supply line detection device.

In the power supply system, the control device applies a yaw moment based on the information detected by the power supply line detection device, thereby suppressing the center position of the contact strip from deviating significantly from the power supply line in the vehicle width direction while the electric vehicle is running. Power supply to electric vehicles can be maintained. However, for this purpose, the power supply system needs to be provided with a power supply line detection device for detecting the power supply line and a control device for controlling the yaw moment applied to the electric vehicle. There is also the problem that the control for following the power supply line is complicated, and the cost of the power supply system becomes high.

JP 2012-244708 A

SUMMARY OF THE INVENTION In view of the above points, the present invention is designed to prevent interruption of power supply from a power supply line to an electric vehicle even if a current collecting member such as a contact strip is displaced from a predetermined position while the electric vehicle is running. It is also an object of the present invention to provide a power supply system for an electric vehicle that can easily achieve this and reduce costs.

In order to solve the above problems, the first invention of the present application is an electric motor mounted on an electric vehicle running on a trackless road surface between a pair of first and second power supply lines constructed above the road surface. A power supply system for an electric vehicle that supplies power so that a current flows through a first power supply line, and supports a first contact strip elongated in the vehicle width direction of the electric vehicle and capable of slidably contacting a first power supply line from below, and the first contact strip. and a first pantograph provided on the roof of the electric vehicle, and a first pantograph provided on the roof of the electric vehicle, and a first pantograph extending in the vehicle width direction of the electric vehicle slidably contactable from below with the second power supply line. a second pantograph provided on the roof of the electric vehicle, having a second pantograph that supports the second slider and a second frame that is vertically bendable and stretchable; The power supply line is spaced apart in the vehicle width direction of the electric vehicle, the second power supply line is located at a position lower than the first power supply line, and the lengths of the first contact strip and the second contact strip are equal to the length of the first contact strip. It is longer than twice the distance between the feed line and the second feed line.

According to the first invention, the pair of first and second power supply lines constructed above the road surface are spaced apart in the vehicle width direction of the electric vehicle, and the second power supply line is lower than the first power supply line. The length of the first slider that is in sliding contact with the first power supply line from below and the length of the second slider that is in sliding contact with the second power supply line from below are determined by the position of the first power supply line and the second power supply line. Since it is longer than twice the interval between the power supply is uninterrupted. Therefore, it is possible to easily maintain power supply to the electric vehicle, and reduce the cost of the power supply system.

In the above-described first invention, the first contact strip extends from the longitudinal center to one end on the side of the second feeder line from a direction intersecting the vehicle width direction of the electric vehicle until it coincides with the vehicle width direction. , and the first slider extends in the vehicle width direction from a direction intersecting the vehicle width direction of the electric vehicle so as not to contact the second power supply line when the first framework is bent and stretched. It is desirable to bend within the range of matching. Alternatively, the first slider is rotatable about a vertical rotation axis positioned at the center in the longitudinal direction, and the first slider does not come into contact with the second power supply line when the first framework is bent and stretched. It is desirable to turn in a direction intersecting with the vehicle width direction of the electric vehicle. According to this, even if the second power supply line is located at a position lower than the first power supply line, when the first pantograph bends and stretches, the first contact strip is positioned in a direction intersecting the vehicle width direction of the electric vehicle. Since the first contact strip is bent within a range until it coincides with the width direction or turns in a direction that intersects the vehicle width direction of the electric vehicle, the first contact strip does not come into contact with the second power supply line, and the second Breakage and breakage of the power supply line can be prevented.

A second invention of the present application is a power supply system for an electric vehicle that supplies power to an electric vehicle running on a trackless road surface so that current flows between a pair of first and second power supply lines to an electric motor mounted on the electric vehicle. A first contact strip extending in the vehicle width direction of the electric vehicle, which is slidable from below on a first power supply line constructed above the road surface, and the first contact strip are supported and vertically bendable and stretchable. a first pantograph provided on the roof of the electric vehicle; and a second slider that supports the second slider and is flexible and stretchable in the vehicle width direction of the electric vehicle. and a second pantograph provided on the side surface of the electric vehicle, wherein the length of the first contact strip and the bending and stretching range of the second framework are equal to or greater than a predetermined first variation distance in which the electric vehicle while running varies in the vehicle width direction. and the length of the second contact strip is equal to or greater than a predetermined second variation distance by which the electric vehicle in motion fluctuates in the vertical direction.

According to the second aspect of the invention, the second pantograph is provided on the side surface of the electric vehicle directly facing the second power supply line installed above one side of the road surface and at a position lower than the first power supply line. The second slider can slidably contact the second power supply line from the side, and the length of the first slider of the first pantograph and the bending and stretching range of the second framework of the second pantograph supporting the second slider are When the length of the second contact strip is longer than or equal to a predetermined second variation distance in which the electric vehicle in the middle varies in the vehicle width direction, and the length of the second contact strip is longer than or equal to the second predetermined variation distance in which the electric vehicle in motion fluctuates in the vertical direction. Therefore, even if one or both of the first contact strip and the second contact strip are displaced from the predetermined position while the electric vehicle is running, power is not supplied from the first power supply line and the second power supply line. uninterrupted. Therefore, it is possible to easily maintain power supply to the electric vehicle, and reduce the cost of the power supply system.

A third invention of the present application is a power supply system for an electric vehicle that supplies power to an electric vehicle running on a trackless road surface so that current flows between a pair of first and second power supply lines to an electric motor mounted on the electric vehicle. A first contact strip extending in the vehicle width direction of the electric vehicle, which is slidable from below on a first power supply line constructed above the road surface, and the first contact strip are supported and vertically bendable and stretchable. A first pantograph provided on the roof of the electric vehicle, and a second power supply line laid on the road surface or below the road surface. A current collector provided under the floor of the electric vehicle, which has a current collector and a second framework that supports the current collector and is vertically bendable and stretchable, and the current collector is arranged in the vehicle width direction of the electric vehicle. It is slidable and provided with a movable mechanism provided on the floor of the electric vehicle, and the sliding range of the current collector by the length of the first contact strip and the movable mechanism varies in the vehicle width direction of the running electric vehicle. The bending and stretching range of the second framework is equal to or longer than a predetermined first variation distance, and the bending and stretching range of the second framework is equal to or greater than a predetermined second variation distance in which the electric vehicle during running fluctuates in the vertical direction.

According to the third invention, the length of the first slider of the first pantograph which is slidable on the first feeder line from below, and the slider which is slidable on the second feeder line laid on or below the road surface from above. A sliding range of the movable mechanism of the current collecting member is equal to or greater than a predetermined first variation distance in which the electric vehicle in motion fluctuates in the vehicle width direction, and a second framework of the current collector provided under the floor of the electric vehicle. is greater than or equal to the predetermined second variation distance in which the electric vehicle during running fluctuates in the vertical direction. The power supply from the first power supply line and the second power supply line is not interrupted even if the position is shifted from the position of the power supply line. Therefore, it is possible to easily maintain power supply to the electric vehicle, and reduce the cost of the power supply system.

In the third invention, the current collecting member is the second contact strip and the current collector is the second pantograph, or the current collecting member is a conductive roller, and the roller extends in the vehicle width direction of the electric vehicle. It is desirable that it is rotatable around the rotation axis and that it is longitudinal in the vehicle width direction of the electric vehicle. According to this, the structure of the current collector can be simplified, and cost reduction of the power supply system can be further promoted.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of essential parts schematically showing an embodiment of a power supply system for an electric vehicle according to the first invention of the present application; FIG. 2 is a front view showing the power supply system of the electric vehicle shown in FIG. 1 from the rear side in the running direction of the electric vehicle; FIG. 2 is a perspective view of essential parts showing a more specific embodiment of the power supply system for the electric vehicle shown in FIG. 1 ; FIG. 4 is a perspective view of a main part showing a more specific embodiment of the power supply system for the electric vehicle shown in FIG. 1, which is different from the embodiment shown in FIG. 3; FIG. 11 is a perspective view of a main part schematically showing an embodiment of a power supply system for an electric vehicle according to the second invention of the present application; FIG. 11 is a perspective view of a main part schematically showing an embodiment of a power supply system for an electric vehicle according to the third invention of the present application; FIG. 11 is a perspective view of a main part schematically showing another embodiment of the power supply system for an electric vehicle according to the third invention of the present application;

An embodiment of a power supply system for an electric vehicle according to the first invention of the present application will be described with reference to FIGS. 1 and 2. FIG. The electric vehicle 1 is a truck having a total of four or more wheels 2, and only the driver's seat side is illustrated with the cargo bed portion omitted.

The electric vehicle 1 is equipped with an electric motor (not shown), and torque when the electric motor rotates is transmitted to the wheels 2 so that the electric vehicle 1 runs on a trackless road surface. Electric power is supplied to the electric vehicle 1 between a first power supply line 3 and a second power supply line 4 provided as a pair above the road surface, and current flows through the electric motor due to the power supply. In this embodiment, the first power supply line 3 and the second power supply line 4 are positive and negative, respectively, and direct current flows through the electric motor. In addition, the first power supply line 3 and the second power supply line 4 are spaced apart in the vehicle width direction of the electric vehicle 1 , and the second power supply line 4 is positioned lower than the first power supply line 3 .

A first pantograph 5 and a second pantograph 6 are provided on the roof of the electric vehicle 1 . Both the first pantograph 5 and the second pantograph 6 are so-called single-arm pantographs. The first pantograph 5 supports a first slider 51 longitudinal in the vehicle width direction of the electric vehicle 1 and the first slider 51, which is slidably contactable with the first power supply line 3 from below, and is vertically bendable and stretchable. and a first framework 52 . The first framework 52 includes an upper frame 52a and a lower frame 52b, and the lower end of the upper frame 52a and the upper end of the lower frame 52b are connected by hinges so as to be bendable and stretchable. The upper frame 52a supports the first contact strip 51 at its center. Generally, the first framework 52 includes a first balance link (not shown) that keeps the posture of the first slider 51 constant, and a second balance link that rocks the upper frame 52a in conjunction with the rocking motion of the lower frame 52b. A balance link (not shown) is provided.

Similarly to the first pantograph 5 , the second pantograph 6 also has a second slider 61 that is longitudinal in the vehicle width direction of the electric vehicle 1 and that can slidably contact the second power supply line 4 from below. It has a second framework 62 that supports and is vertically bendable and stretchable. The second framework 62 includes an upper frame 62a and a lower frame 62b, and the lower end of the upper frame 62a and the upper end of the lower frame 62b are connected by hinges so as to be bendable and stretchable. The upper frame 62a supports the second contact strip 61 at its center. Similarly to the first framework 52, the second framework 62 also includes a first balance link (not shown) that keeps the posture of the second slider 61 constant, and an upper framework 62a that is interlocked with the swing of the lower framework 62b. A second balance link (not shown) is generally provided for rocking the .

In the first pantograph 5 and the second pantograph 6 as described above, the lengths l ₁ and l ₂ of the first contact strip 51 and the second contact strip 61 are set to It is longer than twice the interval d. By doing so, even if one or both of the first contact strip 51 and the second contact strip 52 are displaced from the predetermined position while the electric vehicle 1 is running, the first power supply line 3 and the second contact strip 52 can be displaced. Power supply from the power supply line 4 is never cut off. Therefore, it is possible to easily maintain the power supply to the electric vehicle 1 and reduce the cost of the power supply system.

Next, a more specific example of the power supply system for the electric vehicle 1 shown in FIGS. 1 and 2 will be described with reference to FIGS. 3 and 4. FIG. Referring to FIG. 3 , in the power supply system for electric vehicle 1 , first slider 51 extends in the vehicle width direction of electric vehicle 1 so as not to contact second power supply line 4 when first framework 52 bends and stretches. It can be freely bent within a range from the crossing direction to the width direction of the vehicle. Specifically, the first contact strip 51 supported by the upper end of the upper frame 52 a of the first framework 52 at the center in the length direction is installed at one point from the center in the length direction to the second feeder line 4 . A rotating shaft 53 is provided in a high direction, and a portion from the rotating shaft 53 to one end on the side of the second feed line 4 is a bent portion 51a. is bendable within a range from a direction that crosses the vehicle width direction of the electric vehicle 1 to a direction that coincides with the vehicle width direction. Here, the turning angle of the bent portion 51a can be up to 180 degrees forward and backward in the vehicle length direction with reference to the state in which the first contact strip 51 is in sliding contact with the first power supply line 3 .

In the power supply system of the electric vehicle 1 shown in FIG. 3, the first pantograph 5 and the second pantograph 6 can bend and stretch as follows when power is supplied between the first power supply line 3 and the second power supply line 4 and stopped. When power is supplied to the electric vehicle 1, first, before the first framework 52 is extended upward, the bent portion 51a is moved from the direction intersecting the vehicle width direction of the electric vehicle 1 with the pivot shaft 53 as the center. The first contact strip 51 is bent by rotating within a range until it matches the direction. At this time, the turning angle of the bent portion 51a can be set to, for example, 90°. Next, the first pantograph 5 is lifted by extending the first framework 52 upward while keeping the first slider 51 in this state. Then, when the first slider 51 crosses the second power supply line 4 upward, the bent portion 51a is bent in the direction opposite to the previous bending to return to the original state, and the first slider 51 is removed. Extend everything in a straight line. After that, the central portion of the first contact strip 51 is brought into contact with the first feed line 3 from below. Then, the second frame 62 of the second pantograph 6 is extended upward, and the center of the second contact strip 61 is brought into contact with the second feeder line 4 from below. Thus, a direct current flows through the electric motor mounted on the electric vehicle 1, and the electric vehicle 1 can run.

When stopping power supply to the electric vehicle 1, first, the second pantograph 6 is lowered by bending the second frame 62 of the second pantograph 6 downward. When the contact between the second contact strip 61 and the second power supply line 4 is released, the power supply is stopped. Next, the bent portion 51a of the first contact strip 51 in contact with the first power supply line 3 is aligned with the vehicle width direction from the direction intersecting the vehicle width direction about the rotation shaft 53 as in the case of power supply. Rotate within the range of After that, the first pantograph 5 is lowered by bending the first framework 52 while keeping the first slider 51 in this state. Then, when the first pantograph 5 reaches the lowest position, the bent portion 51a is bent in the direction opposite to the previous bending to return to the original state, and the entire first slider 51 is extended in a straight line. .

By doing so, even if the second power supply line 4 is located at a position lower than the first power supply line 3, the first contact strip 51 is prevented from moving in the vehicle width direction of the electric vehicle 1 when the first pantograph 5 is bent and stretched. Since the first contact strip 51 does not come into contact with the second power supply line 4, the breakage or breakage of the second power supply line 4 is prevented. can be prevented. The timing of bending the first slider 51 when extending and lowering the first pantograph 5 can be arbitrary as long as it does not contact the second feeder line 4 .

Referring to FIG. 4, in the power supply system of electric vehicle 1, first slider 51 is rotatable about vertical pivot 54 located at the center in the longitudinal direction. When the first framework 52 bends and stretches, it turns in a direction intersecting the vehicle width direction of the electric vehicle 1 so as not to contact the second power supply line 4 . That is, the first slider 51 supported at the center in the length direction by the upper end of the upper frame 52a of the first framework 52 has a pivot shaft 54 at the center in the length direction. The plate 51 is rotatable in a direction crossing the vehicle width direction of the electric vehicle 1 .

When power is supplied to the electric vehicle 1 , first, the first slider 51 is turned around the turning shaft 54 in a direction crossing the vehicle width direction of the electric vehicle 1 before the first framework 52 is extended upward. The turning angle at this time can be 90°, for example, and in this case, the longitudinal direction of the first contact strip 51 coincides with the vehicle length direction of the electric vehicle 1 . Next, the first pantograph 5 is lifted by extending the first framework 52 upward while keeping the first slider 51 in this state. Then, when the first slider 51 crosses the second feeder line 4 upward, it is turned about the turning shaft 54 so as to match the vehicle width direction of the electric vehicle 1, thereby returning to the initial state. After that, the central portion of the first contact strip 51 is brought into contact with the first feed line 3 from below. Then, the second frame 62 of the second pantograph 6 is extended upward, and the center of the second contact strip 61 is brought into contact with the second feeder line 4 from below. Thus, a direct current flows through the electric motor mounted on the electric vehicle 1, and the electric vehicle 1 can run.

When stopping power supply to the electric vehicle 1, first, the second pantograph 6 is lowered by bending the second frame 62 of the second pantograph 6 downward. When the contact between the second contact strip 61 and the second power supply line 4 is released, the power supply is stopped. Next, the first pantograph 5 is lowered by bending the first framework 51 to release the contact between the first contact strip 51 and the first feeder line 3 . After that, the first contact strip 51 is turned around the turning shaft 54 in a direction crossing the vehicle width direction. Further, with the first slider 51 in this state, the first framework 52 is bent to lower the first pantograph 5 until the first slider 51 is positioned below the second feeder line 4 . Then, the first slider 51 is turned about the turning shaft 54 until it coincides with the vehicle width direction of the electric vehicle 1 to return to the original state, and the first pantograph 5 is lowered to the initial position.

By doing so, even if the second power supply line 4 is located at a position lower than the first power supply line 3, the first contact strip 51 is prevented from moving in the vehicle width direction of the electric vehicle 1 when the first pantograph 5 is bent and stretched. Since the first contact strip 51 does not come into contact with the second power supply line 4, breakage and damage of the second power supply line 4 can be prevented. The timing of turning the first slider 51 when the first pantograph 5 is extended and lowered can be arbitrary as long as it does not come into contact with the second feeder line 4 .

An embodiment of a power supply system for an electric vehicle according to the second invention of the present application will be described with reference to FIG. The electric vehicle 1 is a truck having a total of four or more wheels 2, and only the driver's seat side is illustrated with the cargo bed portion omitted. In addition, in FIG. 5, the same parts as those in the embodiment of the first invention of the present application shown in FIGS. 1 and 2 are denoted by the same reference numerals, and the description thereof will be omitted below.

In the power supply system for the electric vehicle 1 shown in FIG. 5 , the second power supply line 7 paired with the first power supply line 3 installed above the road surface is positioned above one side of the road surface and lower than the first power supply line 3 . It is erected in The second pantograph 8 is provided on the side surface of the electric vehicle 1 facing the second power supply line 7 according to the installation position of the second power supply line 7 . The second pantograph 8 supports a vertically elongated second slider 81 that is slidably contactable with the second feeder line 7 from the side, and the second slider 81, and bends and stretches in the vehicle width direction of the electric vehicle 1. a flexible second framework 82; The second framework 82 includes a first frame 82a and a second frame 82b, and the first frame 82a and the second frame 82b are connected by hinges at their adjacent ends so as to be bendable and stretchable. The first frame 82a supports the second contact strip 81 at its center. 1 and 2, the second framework 82 also has a first balance link (not shown) that keeps the posture of the second contact strip 81 constant, and a rocking mechanism for the second frame 82b. A second balance link (not shown) is generally provided for swinging the first frame 82a in conjunction with movement.

In the power supply system of the electric vehicle ₁ shown in FIG. 5, the length l1 of the _first contact strip 51 of the first pantograph 5 and the bending and stretching range r1 of the second framework 82 of the second pantograph 8 are The length l3 of the second contact strip 81 is equal to or greater than a predetermined first variation distance by which the vehicle 1 varies in the vehicle width direction, and the length l3 of the second contact strip 81 is a predetermined second variation distance by which the electric vehicle ₁ moves in the vertical direction. That's it. By doing so, even if one or both of the first contact strip 51 and the second contact strip 81 are displaced from the predetermined positions while the electric vehicle 1 is running, the first power supply line 3 and the second contact strip 81 are prevented from moving. The power supply from the power supply line 7 is never interrupted. Therefore, it is possible to easily maintain the power supply to the electric vehicle 1 and reduce the cost of the power supply system. Both the first variable distance and the second variable distance can be appropriately set and changed based on the width and undulation of the road surface, the empirical value of road surface travel, and the like. Furthermore, in the power supply system for the electric vehicle 1 shown in FIG. The order of bending and stretching the first pantograph 5 and the second pantograph 8 does not matter when power is supplied and stopped.

An embodiment of a power supply system for an electric vehicle according to the third invention of the present application will be described with reference to FIG. The electric vehicle 1 is a truck having a total of four or more wheels 2, and only the driver's seat side is illustrated with the cargo bed portion omitted. Moreover, in FIG. 6, the same parts as those of the embodiment of the first invention of the present application shown in FIGS.

In the power supply system for the electric vehicle 1 shown in FIG. 6, the second power supply line 9 paired with the first power supply line 3 installed above the road surface is laid on or below the road surface. When laying the 2nd electric power feeding line 9 under a road surface, for example, a pit etc. can be formed in a road and the 2nd electric power feeding line 9 can be laid in the inside. A second pantograph 10 a as a current collector 10 is provided under the floor of the electric vehicle 1 along with the laying position of the second power supply line 9 . The second pantograph 10a is slidable on the second power supply line 9 from above, and supports a second contact strip 101a as a current collecting member 101 elongated in the vehicle width direction of the electric vehicle 1 and the second contact strip 101a. and a second framework 102 that is vertically bendable and stretchable. The second framework 102 includes an upper frame 102a and a lower frame 102b, and the upper frame 102a and the lower frame 102b are connected by hinges at their adjacent ends so as to be bendable and stretchable. The lower frame 102b supports the second contact strip 101a at its center. 1 and 2, the second framework 102 also has a first balance link (not shown) that keeps the posture of the second slider 101a constant, and a swing mechanism for the upper frame 102a. A second balance link (not shown) for swinging the lower frame 102b in conjunction with is generally provided. In the power collection system of the electric vehicle 1 shown in FIG. 6 , a movable mechanism 11 that allows the second pantograph 10 a to slide in the vehicle width direction of the electric vehicle 1 is provided on the floor of the electric vehicle 1 .

Further, in the power supply system for the electric vehicle 1 shown in FIG. 6, the length l1 of the contact strip 51 of the _first pantograph 5 and the sliding range of the second pantograph 10a by the movable mechanism 11 correspond to the vehicle width of the running electric vehicle 1. The bending and stretching range r2 of the _second framework 102 is greater than or equal to a predetermined second variation distance in which the electric vehicle 1 fluctuates in the vertical direction while it is running. By doing so, even if one or both of the first contact strip 51 and the second contact strip 101a are displaced from the predetermined position while the electric vehicle 1 is running, the first power supply line 3 and the second contact strip 101a can be displaced. The power supply from the power supply line 9 is never interrupted. Therefore, it is possible to easily maintain the power supply to the electric vehicle 1 and reduce the cost of the power supply system. Moreover, the structure of the current collector 10 can be simplified, and the cost reduction of the power supply system can be further promoted. As in the power supply system of the electric vehicle 1 shown in FIG. 5, both the first variable distance and the second variable distance can be appropriately set and changed based on the width and undulation of the road surface, empirical values when traveling on the road surface, and the like. can be done. Furthermore, in the power supply system of the electric vehicle 1 shown in FIG. The order of bending and stretching the first pantograph 5 and the second pantograph 10a does not matter when power is supplied between and stopped.

An embodiment of a power supply system for an electric vehicle according to the third invention of the present application will be described with reference to FIG. It should be noted that the electric vehicle 1 is a truck, and only the driver's seat side is illustrated with the cargo bed portion omitted. In addition, in FIG. 7, the same parts as in the embodiment of the third invention of the present application shown in FIG.

In the power supply system for the electric vehicle 1 shown in FIG. 7, the current collecting member 101 is a roller 101b having conductivity, the roller 101b is rotatable around the rotation shaft 12 in the vehicle width direction of the electric vehicle 1, and It is different from the power collection system of the electric vehicle 1 shown in FIG. 6 in that it is longitudinal in the vehicle width direction of the electric vehicle 1 . Even if the roller 101b having conductivity is used as the current collecting member 101, even if one or both of the first contact strip 51 and the roller 101b are displaced from the predetermined position while the electric vehicle 1 is running, the first The power supply from the power supply line 3 and the second power supply line 9 is never interrupted. Therefore, it is possible to easily maintain the power supply to the electric vehicle 1 and reduce the cost of the power supply system.

Although the embodiments of the first to third inventions of the present application have been described above with reference to the drawings, the first to third inventions of the present application are not limited thereto. For details such as the type and structure of the electric vehicle, the material, structure, and installation or laying method of the first and second power supply lines, the structure of the pantograph including the slider and frame, the structure and structure of the movable mechanism, etc. Various aspects may be adopted.

DESCRIPTION OF SYMBOLS 1... Electric vehicle, 3... 1st power supply line, 4, 7, 9... 2nd power supply line, 5... 1st pantograph, 51... 1st contact strip, 52... 1st framework, 54... Pivoting shaft, 6, 8 , 10a... Second pantograph 61, 81, 101a... Second slider 62, 82, 102... Second framework 10... Current collector 101... Current collecting member 101b... Roller 11... Movable mechanism 12 ...rotational axis, d...distance between the first power supply line ₃ and the second power supply line 4, l1...length of the _first contact strip 51, l2...length of the _second contact strip 61, l3... length of the _second contact strip 81, r ₁ .

Claims (7)

A power supply system for an electric vehicle that supplies power to an electric vehicle traveling on a trackless road surface so that a current flows to an electric motor mounted on the electric vehicle between a pair of first and second power supply lines installed above the road surface. hand,
a first slider extending in the vehicle width direction of the electric vehicle and capable of slidably contacting the first power supply line from below; a first pantograph provided on the roof of the vehicle;
a second slider extending in the vehicle width direction of the electric vehicle and capable of slidably contacting the second power supply line from below; A second pantograph provided on the roof of the vehicle,
The first power supply line and the second power supply line are spaced apart in the vehicle width direction of the electric vehicle, and the second power supply line is positioned lower than the first power supply line,
A power supply system for an electric vehicle, wherein the lengths of the first contact strip and the second contact strip are longer than twice the distance between the first power supply line and the second power supply line. The first slider is bendable within a range from a direction intersecting the vehicle width direction of the electric vehicle to the vehicle width direction at one point from the center in the longitudinal direction to one end on the side of the second power supply line. and the first slider extends from a direction intersecting with the vehicle width direction of the electric vehicle to the vehicle width direction so as not to come into contact with the second power supply line when the first framework bends and stretches. 2. The power supply system for an electric vehicle according to claim 1, wherein the power supply system is bent. The first slider is rotatable about a vertical rotation axis positioned at the center in the longitudinal direction, and the first slider is arranged so as not to contact the second power supply line when the first framework is bent and stretched. 2. The power supply system for an electric vehicle according to claim 1, wherein the electric vehicle turns in a direction intersecting with the width direction of the electric vehicle. A power supply system for an electric vehicle that supplies power to an electric vehicle running on a trackless road surface so that a current flows between a first and second pair of power supply lines to an electric motor mounted on the electric vehicle,
A first slider longitudinal in the vehicle width direction of an electric vehicle, which is slidable from below on a first power supply line constructed above the road surface, and a first framework supporting the first slider and vertically bendable and stretchable. and a first pantograph provided on the roof of the electric vehicle;
A vertically elongated second slider that is slidably contactable from the side with a second power supply line installed above one side of the road surface and at a position lower than the first power supply line, and the second slider. and a second pantograph provided on a side surface of the electric vehicle facing the second power supply line, having a second framework that is flexible in the vehicle width direction of the electric vehicle,
The length of the first contact strip and the bending and stretching range of the second framework are equal to or greater than a predetermined first variation distance in which the electric vehicle that is running fluctuates in the vehicle width direction, and the length of the second contact strip is equal to or greater than that of the running electric vehicle. 1. A power supply system for an electric vehicle, wherein the electric vehicle is a predetermined second variation distance or more in which the electric vehicle varies in the vertical direction. A power supply system for an electric vehicle that supplies power to an electric vehicle running on a trackless road surface so that a current flows between a first and second pair of power supply lines to an electric motor mounted on the electric vehicle,
A first slider longitudinal in the vehicle width direction of an electric vehicle, which is slidable from below on a first power supply line constructed above the road surface, and a first framework supporting the first slider and vertically bendable and stretchable. and a first pantograph provided on the roof of the electric vehicle;
A current collecting member elongated in the vehicle width direction of the electric vehicle and capable of slidably contacting a second power supply line laid on the road surface or below it from above; and a current collector provided under the floor of the electric vehicle, and a movable mechanism that allows the current collector to slide in the vehicle width direction of the electric vehicle and is provided on the floor of the electric vehicle,
The length of the first contact strip and the sliding range of the current collector by the movable mechanism are equal to or greater than a predetermined first variation distance in which the running electric vehicle fluctuates in the vehicle width direction, and the bending and stretching range of the second framework is 1. A power supply system for an electric vehicle, wherein the electric vehicle during running has a predetermined second variation distance or more in which the electric vehicle varies in the vertical direction. 6. The power supply system for an electric vehicle according to claim 5, wherein the current collecting member is the second contact strip and the current collector is the second pantograph. The current collecting member is a roller having conductivity, the roller is rotatable around a rotation axis in the vehicle width direction of the electric vehicle, and the roller is longitudinal in the vehicle width direction of the electric vehicle. 6. The power supply system for an electric vehicle according to 5.

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