JP2001219850A - Electric-motor truck - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the operability of an electric-motor truck. SOLUTION: A control box 7 is arranged on the upper portion of a support frame 5 erected on the upper surface of a truck portion 2, and an accelerator lever 10 is extended on both sides thereof. An operation handle 12 is turnably fitted to the support frame 5 via a support box 11, the accelerator lover 10 is turned by turning the operation handle 12, the energization status of a motor is adjusted, and the traveling speed of the truck 1 is changed. An upper portion of the operation handle 12 forms a forward operation unit 12A1 by the pushing operation while a lower portion forms a backward operation unit 12A2 by the pulling operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric bogie.

[0002]

2. Description of the Related Art Conventionally, there has been known an electric bogie having a push cart as a basic structure, wherein an electric motor is mounted on a lower surface of a bogie portion so as to be able to move forward and backward by electric power. FIG. 6 shows an operation part of the electric bogie. A U-shaped handle 20 is provided upright on a bogie portion of the electric bogie, and a control box 21 is arranged at the center of an upper edge thereof, and an accelerator lever 22 extends right and left from the side thereof. It has a simple structure. Since the part where the accelerator lever 22 is operated is located away from the handle 20 in a forward direction, when the bogie is run,
The operator operates the accelerator lever 22 with his fingertip while holding the handle. The accelerator lever 22 is operatively connected to a current control device in the control box 21 to change the energization state of the electric motor in accordance with the rotation state of the accelerator lever 22, thereby adjusting the traveling speed of the bogie. Was.

[0003]

However, in the above-described apparatus, the traveling speed is adjusted by an accelerator lever 22 provided separately from the steering wheel 20, and the operation of the accelerator lever 22 is controlled by the fingertip while the steering wheel 20 is being held. Operation is difficult because it is performed by operation. Since the steering wheel 20 is used to steer the entire bogie, when the driver is distracted by steering, for example, when passing while avoiding crowds or when changing directions, a delicate operation of the accelerator lever 22 is required. Operation is likely to shift. The present invention has been devised in view of the above circumstances, and an object of the present invention is to provide an electric bogie having excellent operability.

[0004]

According to a first aspect of the present invention, there is provided a truck having driving wheels which can be driven by an electric motor, and a supporting portion provided upright from the truck. And an operation unit mounted to be rotatable with respect to the support unit and capable of steering the entire bogie, and a speed adjustment for changing an energization state to the electric motor in conjunction with the rotation operation with respect to the operation unit. Means. In the invention of claim 2, claim 1
In the device described above, a switching unit capable of switching a rotation direction with respect to the drive wheel is provided, and the operation unit moves the entire electric trolley forward at the time of rotation when pressed forward, and pulls it toward the near side. The setting is such that the entire electric bogie moves backward when the vehicle rotates. According to a third aspect of the present invention, in the second aspect, the switching means is arranged independently of the operation section, and the operation section has a forward operation section on the upper side of the rotation center and a lower operation section. The side is a reverse operation unit.

[0005]

According to the first aspect of the present invention, when the electric bogie is run, the user performs a turning operation while holding the operation unit. By doing so, the current supply to the electric motor is changed by the speed adjusting means, so that the electric bogie can be run while adjusting the speed. As described above, in the first aspect of the present invention, the operation unit performs both the steering of the entire bogie and the operation for driving the bogie. Therefore, since it is sufficient to rotate the entire operation unit while holding the operation unit, there is no need for a delicate and cumbersome operation such as operating the accelerator lever by fingertip operation while holding the handle as in the past, and the operability is improved. It will be excellent. According to the second aspect of the present invention, the forward operation on the electric bogie is made to correspond to the pressing operation, and the reverse operation is made to correspond to the pulling operation, that is, the natural operation when the user uses the ordinary hand cart. Ergonomic considerations have been given, such as responding to different senses. Therefore, for example, when an unexpected situation occurs while driving,
The operation can be stopped naturally, and the safety can be improved. According to the third aspect of the present invention, the forward / backward switching can be performed by operating the forward operating unit or the reverse operating unit after switching the switching unit in advance. In this case, since both operation units are arranged vertically with the rotation center interposed therebetween, the operation units rotate in the same direction regardless of the operation of pressing or pulling. It becomes possible. According to the third aspect of the present invention, the forward operation unit for performing the pressing operation is disposed at a higher position of the operation unit, and the reverse operation unit for performing the pulling operation is disposed at the lower position. Since the arrangement is easy to operate, the operability is excellent.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an entire electric trolley (hereinafter simply referred to as a trolley 1). The trolley 1 has a trolley part 2 whose upper surface is a luggage compartment,
Attached are two wheels, a battery and an electric motor 19 with an electromagnetic brake connected to the battery. Of the four wheels described above, the front wheel 3A is a so-called free caster in which a portion attached to the bogie unit 2 can freely rotate around a vertical axis, and the rear wheel is a drive wheel 4A driven by an electric motor 19 (not shown). I have. The two drive wheels 4A are attached to both ends of a drive axle driven by the electric motor 19, and a differential device (both not shown) is provided at the center of the drive axle.

[0007] At both rear corners of the upper surface of the bogie section 2, support frames 5 constituting support portions are provided upright. The support frame 5 has a downward U-shape, and a beam 6 for reinforcement is provided at an intermediate portion thereof. A control box 7 is attached to the center of the upper edge of the support frame 5. The control box 7 is provided with a dial type speed controller 8. The speed controller 8 can switch between three speed modes of low, medium and high, and controls the electric motor 1 so that the speed is limited within the upper limit speed set for each.
9 is regulated. Also,
A control switch 7 (switching means) is provided in the control box 7 adjacent to the speed controller 8. This forward / reverse switch 9
Is a seesaw-type switch, which can select either forward or reverse rotation of the electric motor 19 by a switching operation. Further, a pair of left and right accelerator levers 10 are provided on both sides of the control box 7 so as to protrude. Both accelerator levers 10 (speed adjusting means) are rotatably mounted, and the amount of power to the electric motor 19 is increased or decreased with the rotation, so that the traveling speed of the bogie 1 can be adjusted. .
A return means (not shown) is linked to the accelerator lever 10 so that a biasing force for returning the accelerator lever 10 to the original position is applied.

A pair of left and right support boxes 11 that constitute a support portion of the present invention together with the support frame 5 are attached to the upper edge of the support frame 5 on both sides of the control box 7. That is, both support boxes 11 are vertically divided into two parts, and by closing them, the support frame 5 can be inserted and inserted.

An operation handle 12 (operation section) is rotatably mounted on the support box 11. The operation handle 12 is formed in a substantially rectangular frame shape having R portions at four corners from the horizontal frames 12A1 and 12A2 and the vertical frame 12B, and a protruding shaft 13 protrudes from an inner central portion of the vertical frame 12B. When the projecting shaft 13 is pushed into the support box 11 in a state where the projecting shaft 13 is allowed to rotate, the entire operation handle 12 can be turned. Also, the operation handle 1 is provided on the protruding shaft 13.
The second return spring 14 is wound. One end of the spring 14 is inserted and locked into a split groove 15 formed in the tip of the protruding shaft 13 along the radial direction, and the other end is not shown in detail, but in an appropriate position on the inner surface of the support box 11. It is locked to. This allows the spring 1
4 can apply a clockwise biasing force to the operation handle 12 shown in FIG.

Further, on the outer surface of the support box 11 on the side opposite to the side where the protruding shaft 13 is inserted, a protruding shaft 13 is provided.
A disc-shaped connecting member 17 which is fastened and fixed to an end face of the member by a screw 16 and rotates together with the operation handle 12 is provided. A hook piece 18 that can be hooked on the corresponding accelerator lever 10 extends from a part of the outer peripheral surface of the communication member 17, and when the operation handle 12 is rotated counterclockwise as shown in FIG. As a result, the accelerator lever 10 can be rotated in the speed increasing direction (counterclockwise in the figure).

Now, the vertical frame of the operating handle 12 is
The upper side of the height position where 3 is provided stands obliquely toward the user, and the horizontal frame connected to this is a forward operation unit 12A1 which is pressed when the carriage 1 is advanced. On the other hand, the lower side of the protruding shaft 13 in the vertical frame of the operation handle 12 is bent substantially in an L-shape toward the user, and the horizontal frame connected thereto is a reverse operation unit that is pulled in when the carriage 1 is moved backward. 12A2.

Next, the operation and effect of this embodiment configured as described above will be specifically described. When loading the luggage on the upper surface of the carriage unit 2 and carrying the luggage in the forward direction, the user stands behind the operation handle 12 and switches the forward / reverse switch 9 to the forward side while operating the forward operating unit 12A1. Press operation. Then, the operation handle 12 rotates around the protruding shaft 13 in the counterclockwise direction in FIG. 2, and the communication member 17 further interlocks. As a result, the accelerator lever 10 rotates in the same direction via the hook piece 18, so that the electric motor 19 is energized, the drive wheel 4A rotates, and the entire truck 1 moves forward.

On the other hand, when the vehicle 1 is to be moved backward, the reverse operation section 12A2 is pulled and operated while the forward / reverse switch 9 is switched to the reverse side. Then, since the operation handle 12 rotates in the same direction (counterclockwise) as the forward operation, the accelerator lever 10 is also rotated in the same direction as above. However, since the changeover switch 9 has been switched, the electric motor 19 rotates in the opposite direction to the above, and the entire truck 1 moves backward.

When the vehicle 1 is to be moved forward or backward, the user only has to press or pull the whole while holding the operation handle 12. Therefore, the operability is excellent without any fingertip operation of the accelerator lever 10. For this reason, even when the bogie has to be frequently turned, such as when the bogie is sewn through crowds, the steering wheel can be steered while holding the operation handle at a fixed rotation position. Compared to a conventional device in which two members must be operated separately, there is only one operation target and the operation is easy.

Further, the forward operation is performed by a pressing operation, and the reverse operation is performed by a pulling operation. Therefore, the operation is made to be the same as the operation feeling of the ordinary hand-held trolley 1, so that the user can operate as it is with a natural feeling. .
Therefore, it is easy to correctly deal with unexpected situations. Further, the forward operation unit 12A1 on the side performing the pressing operation is set above the operation handle 12, and the reverse operation unit 12A2 on the side performing the pulling operation is set below the operation handle 12, so that both the pressing and the pulling operations are easily performed. .

The present invention can be variously modified.
The following modifications are also included in the technical scope of the present invention. In this embodiment, the forward operation section 12A1 and the reverse operation section 12A2 are arranged at separate positions in the operation handle 12, but they may be set at the same position. In this case, since the rotation direction of the operation handle 12 is reversed in forward and backward directions, the energizing direction to the electric motor 19 may be changed using this operation. In the present embodiment, the operation handle 12 adjusts the speed by operating the accelerator lever 10. However, the operation state of the electric motor 19 may be directly adjusted by the operation handle 12 by eliminating the accelerator lever 10. Good.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an entire electric bogie.

FIG. 2 is a side view showing an operation handle.

FIG. 3 is a perspective view showing the periphery of a control box.

FIG. 4 is a sectional view showing the internal structure of the support box.

FIG. 5 is an exploded perspective view of a support box.

FIG. 6 is a perspective view showing a conventional main part.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Dolly 2 ... Dolly part 5 ... Support frame (support part) 10 ... Accelerator lever 12 ... Operation handle 19 ... Electric motor

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3D050 AA01 BB02 DD03 EE15 GG06 KK14 5H115 PG10 PI13 PU01 QH08 QI02 UI17

Claims (3)

[Claims] A truck provided with driving wheels capable of traveling by an electric motor; a support standing upright from the truck; and a steering operation capable of rotating with respect to the support and controlling the entire truck. An electric bogie comprising: an operation unit movably attached; and speed adjusting means for changing an energization state to an electric motor in conjunction with the turning operation on the operation unit. 2. A control device, comprising: switching means for switching a rotation direction with respect to the drive wheel, wherein the operation unit includes:
2. The electric vehicle according to claim 1, wherein the electric bogie is moved forward when being rotated when pressed forward, and the entire electric bogie is moved backward when being turned toward the near side. Trolley. 3. The switching means is arranged independently of the operation section, while the operation section has a forward operation section on the upper side of the rotation center and a reverse operation section on the lower side. The electric bogie according to claim 2, wherein