JP2014065355A - Electric vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a handy cart including a vehicle body which enables easy strength design made according to a force applying to the vehicle body.SOLUTION: A handy cart 1 includes: a vehicle body frame 10; a controller 4 and a battery 5 which are arranged in the vehicle body frame 10; an electric motor 7; wheels 20; a control stick 2 provided at the vehicle body frame 10; and an operation device 9 which is provided at an end part of the control stick 2 and has a holding part 9a which is held by an operator H. The vehicle body frame 10 includes: a main frame 11 to which the control stick 2 is attached; a sub frame 12 which is provided separately from the main frame 11 so as to be spaced away from the main frame 11 and in which the controller and the battery are disposed; and connection members (13, 14) which connect the main frame 11 with the sub frame 12. The electric motor is attached to the connection members (13, 14).

Description

  The present invention relates to an electric vehicle.

  As an apparatus for facilitating the transportation of luggage in shopping or the like, for example, electric vehicles described in Patent Document 1 and Patent Document 2 have been proposed.

  The electric vehicle is mounted on the body frame, a control device and a battery arranged on the body frame, an electric motor attached to the body frame, a wheel attached to the rotating shaft of the electric motor, and an upward direction from the body frame. And an operating device provided at the upper end of the operating rod.

The operating device is provided with a gripping part that the operator grips. Then, the operation of the electric motor (wheel rotation) is controlled in accordance with an instruction from an operator acting on the operating rod via the gripping portion. In this way, the electric vehicle performs operations such as forward movement and reverse movement according to the intention of the operator.

JP 2012-66784 A JP 2012-71817 A

Here, a control device, an electric motor to which a battery and wheels are attached, and an operating rod are attached to the body frame (vehicle body) at various places. Therefore, the force acting on the vehicle body varies depending on the part. For this reason, the vehicle main body needs to be configured so that the strength design is easy according to the acting force.

Therefore, the present invention has been made in view of the above-described circumstances, and it is an object of the present invention to provide an electric vehicle including a vehicle main body whose strength design is easy according to the force acting on the vehicle main body.

In order to solve the above problems, an electric device of the present invention includes a vehicle main body, a control device disposed in the vehicle main body, a battery that is also disposed in the vehicle main body and supplies power to the control device, and An electric motor disposed in the vehicle main body and operated by control power from a control device, wheels attached to a rotation output portion of the electric motor, an operation rod provided in the vehicle main body, and an end portion of the control rod And an operating device having a grip portion that is gripped by an operator.

  The vehicle main body includes a main frame to which the operation rod is attached, a subframe that is provided separately from the main frame and in which the control device and the battery are disposed, and a connecting member that connects the main frame and the subframe. The motor is attached to the connecting member.

Thus, by providing the main frame to which the operating rod is attached and the sub-frame in which the control device and the battery are arranged separately and independently, the main frame and the sub frame have a force acting on the operating rod or the control device. -It becomes easy to design the strength according to each different force according to the weight of the battery. Furthermore, by providing a connecting member between the main frame and the sub-frame and attaching an electric motor to the connecting member, the strength of the connecting member can be independently designed according to the force from the motor to which the wheel is attached. it can.

The electric movement apparatus of the present invention can provide an electric vehicle including a vehicle main body whose strength design is easy according to the force acting on the vehicle main body.

1 is a perspective view of an electric vehicle according to an embodiment of the present invention. 1 is a perspective view of a vehicle body (vehicle frame) in an embodiment of the present invention. It is a perspective view of the operating device in the embodiment of the present invention. It is a figure explaining the detection of the operation force (pushing force) with an operating device in embodiment of this invention. It is a figure explaining the detection of the operation force (pulling force) with the operating device in the embodiment of the present invention. It is a figure explaining arrangement of a signal line in an embodiment of the present invention. It is a figure explaining the waterproof structure of the controller box in the embodiment of the present invention. It is a figure explaining the structure of the electric motor and wheel in embodiment of this invention. It is a figure explaining the structure of the electric motor in embodiment of this invention. 1 is a side view of an electric vehicle according to an embodiment of the present invention. It is a side view at the time of use of the electric vehicle concerning the embodiment of the present invention.

Next, an electric vehicle (hand-held handy cart) 1 according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a perspective view of an electric vehicle 1 according to an embodiment of the present invention. FIG. 2 is a perspective view of the vehicle body 10 (vehicle frame 10) in the embodiment of the present invention.

As shown in FIG. 1, the electric vehicle 1 includes a vehicle body frame 10 as a vehicle body, a control device 4, a battery 5, a controller box 6, an electric motor (7, 8), and an electric motor (7, 8). The attached wheel (20, 30), the operating rod 2, and the operating device 9 are mainly provided.

As shown in FIG. 2, the vehicle body frame 10 includes a main frame 11, a subframe 12, a connection plate 13 as a first connection member, a connection plate 14 as a second connection member, and a reinforcing member 15. Prepare mainly. The sub frame 12 is separated from the main frame 11 by a separate member and is connected by connecting plates (13, 14).

The main frame 11 includes a center frame 11a made of a metal circular pipe member, and first and second side frames (11b, 11c). The first side frame 11b is formed by bending a metal circular pipe member, and one end thereof is fixed to the center frame 11a. Similarly, the second side frame 11c is also formed by bending a metal cylindrical member, and one end is fixed to the center frame 11a at a position opposite to the first side frame 11b.

The subframe 12 is formed by bending a metal circular pipe member, and both ends thereof are fixed to the connection plates (13, 14). A caster 3 is attached to the bottom of the front end 12 a of the subframe 12.

Next, the arrangement / attachment of each component (2, 4, 5, 6, 7, 8) to the body frame 10 will be described with reference to FIG.

The operating rod 2 is formed from a metal circular pipe member. And it is inserted and arranged in the center frame 11a from the upper end side of the center frame 11a. Here, a fixing member 41 is provided at the end 11a1 of the center frame 11a. Then, the operating rod 2 is axially fixed at a desired position with respect to the center frame 11a by the fixing member 41.

An operation device 9 is provided at the end 2 a of the operation rod 2. The operating device 9 includes a grip portion 9a that the operator H grips. Here, the grip portion 9 a is disposed in front of the vehicle with respect to the axis 2 </ b> L of the operating rod 2. In addition, the operating device 9 is provided with a metal protection member 9g below the grip portion 9a. The protective member 9g can protect the hand of the operator H holding the holding portion 9a from collision of an object from the outside. In the present embodiment, the entire gripping portion 9a is disposed in front of the vehicle with respect to the line 2L. However, a part of the gripping portion 9a may be disposed in front of the vehicle with respect to the axis 2L.

A controller box 6 made of a metal plate is attached to the subframe 12 of the vehicle body frame 10. The controller 4 and the battery 5 are included in the controller box 6. Thus, the control device 4 and the battery 5 are arranged in the subframe 12 via the controller box 6.

As shown in FIG. 2, attachment portions (13 a, 14 a) for attaching the electric motors (7, 8) are connected to the connection plates (13, 14) on the connection plates (13, 14) arranged on both sides of the vehicle body frame 10. 14). And as shown in FIG. 1, the electric motor 7 is attached to the connection plate 13 via the attachment part 13a, and the electric motor 8 is attached to the connection plate 14 via the attachment part 14a.

  As described above, various members are attached to the vehicle body frame 10, such as the operating rod 2, the controller box 6, and the electric motor (7, 8) to which the wheels (20, 30) are attached. In this embodiment, since the force which the operating rod 2 acts on the vehicle body frame 10 is large, the circular tube forming the main frame 11 to which the operating rod 2 is attached is a thick circular tube compared to other circular tubes.

Next, the wiring / control structure of the electric vehicle 1 will be described based on FIG. 1, FIG. 6, and FIG.

The operation device 9 includes a main switch 9f, an operation switch 9e, and a force detection unit 9b. And the signal from the main switch 9f, the operation switch 9e, and the force detection part 9b is supplied to the control apparatus 4 by the signal line LS. Here, as shown in FIG. 6, the signal line LS is spirally arranged in the operation rod 2. Therefore, it is possible to appropriately prevent the signal line LS from being caught when the operating rod 9 is moved in and out of the main frame 11a in the axial direction in order to adjust the height of the grip portion 9a.

The battery 5 supplies power to the control device 4, and the control device 4 supplies control power to the electric motors (7, 8) in response to signals from the operation switch 9e and the force detection unit 9b. Here, the supply of control power from the control device 4 to the electric motors (7, 8) is performed by the power lines (LA, LB).

The main switch 9f is turned on and off by rotating a key (not shown) inserted into the main switch 9f in a predetermined direction. When the main switch 9f is turned on by a key (not shown), the control device 4 is activated.

The operation switch 9e is turned on by an operation held by the operator. When the operator pushes and pulls the grip portion 9a when the operation switch 9e is in the ON state, and an operation force is applied to the grip portion 9a, the operation force is detected by the force detection portion 9b, and the detected force Control power corresponding to the signal is supplied from the control device 4 to the electric motors (7, 8).

Next, the waterproof structure of the controller box 6 will be described based on FIG.

The controller box 6 includes a waterproof connection wall 6a and a separation wall 6b. In the controller box 6, a control chamber 6c and a connection chamber 6d are formed. Here, the control chamber 6c and the connection chamber 6d are partitioned by a separation wall 6b. And the control apparatus 4 and the battery 5 are arrange | positioned in the control room 6c.

The waterproof connection wall 6a has insertion holes (6f, 6f, 6f) through which the signal lines LS and the power lines (LA, LB) are inserted. And each waterproof wall 6e is attached to the position corresponding to each penetration hole 6f. Each waterproof wall 6e has an O-ring O disposed between opposing surfaces of the waterproof connection wall 6a and each waterproof wall 6e, and is fastened and fixed to the waterproof connection wall 6a by bolts S1 and nuts S2.

A screw fastening connector CS is attached to each waterproof wall 6e. Wirings (LS, LA, LB) are respectively inserted into the connector main body CS1 of the screw fastening connector CS. Then, the connector body CS1 is attached to the waterproof wall 6e by the nut CS3, and the wires (LS, LA, LB) are attached in a sealed state in the connector body CS1 by the nut CS2.

The wiring (LS, LA, LB) in which each screw fastening connector CS is arranged in the connection chamber 6d is the wiring (LS, LA, LB) arranged in the connection chamber 6d from the control device 4 and the connector CN. Are electrically connected.

Next, the operating force detection structure in the operating device 9 will be described with reference to FIG.

The operating force detection structure includes 9c, a base member 9h, a rotation pin 9i, a force detection unit 9b, a support pin 9j, and an action pin 9k. The rotating portion 9c is integrally formed with the grip portion 9a and a resin member. Therefore, 9c is mechanically and integrally connected to the grip portion 9a.

The base member 9h is integrally attached to the end 2a of the operating rod 2. The rotating pin 9i is inserted and engaged with the base member 9h, and both ends are engaged with the rotating portion 9c. Then, at least one of the engaging portions between the “rotating pin 9i” and the “base member 9h” or the “rotating portion 9c” is set to be rotatable. Therefore, the rotation part 9c is arrange | positioned so that rotation around the rotating shaft 9d (of the rotation pin 9i) with respect to the base member 9h is possible. That is, the rotation part 9c is rotatably arranged on the operation rod 2 via the base member 9h.

The force detector 9b is formed of a metal rod-like body, and a strain gauge SG is attached to the surface. One end of the force detector 9b is pivotally supported on the support pin 9j so as to be slidable on the base member 9h. The other end of the force detection unit 9b is attached to the rotation unit 9c by an action pin 9k. Here, in the present embodiment, the rotation pin 9i that supports the rotation unit 9c and the support pin 9j that supports the force detection unit 9b are arranged with the axis 2L of the operation rod 2 interposed therebetween. However, the arrangement of the rotation pin 9i and the support pin 9j is not limited to the above, and may be on the vehicle front side or the vehicle rear side with respect to the axis 2L, for example.

Next, the operation of the operating force detection structure in the operating device 9 will be described based on FIGS. 4 and 5.

  FIG. 4 shows the operation of the operating force detection structure when the operator H applies an operating force of “pushing force” to the grip portion 9a. When the operation force of “pushing force” is applied to the grip portion 9a, the rotation portion 9c rotates about a small angle around the axis 9d counterclockwise as viewed in the drawing. And if the rotation part 9c rotates a minute angle, the extension force which extends the force detection part 9b will act on the force detection part 9b from the action pin 9k. Due to this extension force, a strain in the extension direction is formed in the force detector 9b, and this strain is detected by the strain gauge SG. And the operation force which acts on the holding part 9a by this distortion is detected.

  On the other hand, FIG. 5 shows the operation of the operating force detection structure when the operator H applies an operating force of “pulling force” to the grip portion 9a. When the operation force of “pulling force” is applied to the grip portion 9a, the rotation portion 9c is rotated by a small angle around the axis 9d in the clockwise direction in the drawing. When the turning portion 9c is turned by a small angle, a compression force for compressing the force detecting portion 9b is applied to the force detecting portion 9b from the action pin 9k. Due to this compressive force, the force detector 9b forms a strain in the compression direction, and this strain is detected by the strain gauge SG. And the operation force which acts on the holding part 9a by this distortion is detected.

Next, the electric motors (7, 8) and wheels (20, 30) arranged on the left and right of the electric vehicle 1 according to the present embodiment will be described with reference to FIGS. In addition, since the electric motor 7 and the electric motor 8, and the wheel 20 and the wheel 30 are the same structures, one (the electric motor 7, the wheel 20) is demonstrated below.

As shown in FIG. 8, the electric motor 7 mainly includes an electric motor main body 7b and a rotation output unit 7a. The electric motor main body 7b mainly includes a motor (not shown), a rotation sensor (not shown), and a speed reducer (not shown). The motor rotates by the control power supplied from the control device 4. The control power is controlled based on signals from the rotation sensor and the force detection unit. Then, the rotation operation of the motor is decelerated by the reduction gear, and the rotation output that has been decelerated is output from the rotation output unit 7a.

The electric motor 7 is attached to the attachment portion 13a of the connection plate 13 (of the vehicle body frame 10) with a screw S3. And the wheel 20 is attached to the rotation output part 7a of the electric motor 7 with the screw | thread (not shown).

Next, the waterproof structure of the electric motor 7 will be described based on FIG.

As shown in FIG. 9, a substantially cylindrical seal folder 7d is attached to the end of the front bracket 7c of the electric motor 7. The seal folder 7d is provided with a predetermined gap at a position including the cylindrical rotation output portion 7a from the outside in the radial direction. And the sealing member SE is provided in this space | gap part.

The seal member SE has an annular main body SE1 fixed to the inner wall of the seal folder 7d by press fitting. The labyrinth part SE2 of the seal member SE is in sliding contact with the outer wall of the rotation output part 7a while maintaining a watertight state.

Next, the structure of the wheel 20 will be described with reference to FIG.

As shown in FIG. 8, the wheel 20 includes a wheel 20a, a tube 20b, and a tire 20c. The wheel 20a includes a mounting portion 20d and a plurality of spokes 20e. The mounting portion 20d has a bottomed cylindrical shape (a bowl shape), a disc-shaped bottom portion 20d1, and a bottom portion 20d.
a cylindrical tube portion 20d2 formed integrally from the outer edge of d1.

The bottom portion 20d1 is attached to an end portion of the rotation output portion 7a of the electric motor 7 with a screw (not shown). The cylindrical portion 20 d 2 is arranged at a position that includes a part of the electric motor 7 toward the electric motor 7. And the spoke 20e is integrally provided radially in the cylinder part 20d2 which covers a part of the electric motor 7. FIG. As described above, the wheel 20 can be offset to the side of the electric motor 7 (the vehicle 1 side) by arranging the mounting portion 20d of the wheel 20a in a bowl shape and disposing it at a position covering a part of the electric motor 7. Therefore, the vehicle width of the vehicle 1 can be reduced, and the vehicle 1 can be made compact in the vehicle width direction.

Finally, based on FIG. 10 and FIG. 11, the effect by having arrange | positioned the holding part 9a ahead of the vehicle with respect to the axis line of the operating rod is shown.

As shown in FIG. 10, the entire length (L0) of the vehicle 1 can be shortened by arranging the grip portion 9a in front of the axis 2L of the operating rod 2.

As shown in FIG. 11, when the grip 9a (the operation rod 2) is pulled down at a certain angle by arranging the grip 9a in the front of the vehicle with respect to the axis 2L of the operation rod 2, the grip 9a The height (h) from the ground is not significantly changed (δh = small).

The present invention is not limited to the above-described embodiment, and includes various modifications made to the above-described embodiment without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Hand-held hand cart (electric vehicle), 2 ... Control rod, 2a ... End, 2L ... Axis, 3 ... Caster, 4 ... Control device, 5 ... Battery, 6 ... Controller box, 6a ... Waterproof connection wall, 6b ... Separation wall, 6c ... control room, 6d ... connection room, 6e ... waterproof wall, 6f ... insertion hole, 7 ... motor, 7a ... rotation output part, 7b ... motor body, 7c ... front bracket, 7d ... seal folder, 8 ... Electric motor, 8a ... rotation output unit, 9 ... operation device, 9a ... gripping unit, 9b ... force detection unit, 9c ... rotating part, 9d ... rotating shaft, 9e ... operation switch, 9f ... main switch, 9g ... protective member, 9h ... Base member, 9i ... Rotating pin, 9j ... Support pin, 9k ... Action pin, 10 ... Body frame (vehicle body), 11 ... Main frame, 11a ... Center frame, 11a1 ... End, 11b ... First side Rame, 11c ... second side frame, 12 ... subframe, 12a ... tip, 13 ... first connecting member (connecting plate), 13a ... mounting portion, 14 ... second connecting member (connecting plate), 14a ... mounting portion 15 ... reinforcing member, 20 ... wheel, 20a ... wheel, 20b ... tube, 20c ... tire, 20d ... mounting part, 20e ... spoke, 30 ... wheel, 41 ... fixing member, H ... operator, LS ... signal line, LA ... power line, LB ... power line, CS ... screw fastening connector, CS1 ... connector body, CS2 ... connection nut, CS3 ... nut, O ... O-ring, S1 ... bolt, S2 ... nut, CN ... connector, S3 ... screw, SE ... Seal member, SE1 ... Main body part, SE2 ... Labyrinth part, SG ... Strain gauge

Claims (1)

A vehicle main body, a control device arranged in the vehicle main body, a battery arranged in the vehicle main body for supplying electric power to the control device, an electric motor arranged in the vehicle main body and operated by control electric power from the control device, An electric motor provided with a wheel attached to a rotation output portion of the electric motor, an operating rod provided in the vehicle main body, and an operating device provided at an end portion of the control rod and having a gripping portion gripped by an operator. In the vehicle,
The vehicle main body is provided with a main frame to which the operation rod is attached, a sub-frame that is provided separately from the main frame, the control device and the battery are disposed, and the main frame and the sub-frame are connected to each other. And an electric vehicle, wherein the electric motor is attached to the connecting member.

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