JPH11227610A - Motor-assisted handcart for loading burden - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motor-assisted handcart for loading a burden by equipping with an assisting power device driven by a motor. SOLUTION: A handcart includes a burden placing part 2 on a body frame 21 equipped with casters 5 and 6 in front and in the rear, and a power assist driving device 3 is equipped with motor M behind the burden placing part 2, and driving wheels driven by the assist driving device 3 are furnished as rear wheels. In this cart, the driving wheels 5 are made with a greater diameter than the front wheels. The body frame 21 of the burden placing part 2 is extended backward, and the driving device 3 is installed on the extended frame part 21a. The driving wheels 5 are located on the left and right, each being equipped with one motor M. The outside position of each driving wheel 5 is adjusted approx. flush with or inside of the lateral side face of the burden placing part 2. The front and rear wheels are positioned as not overlapped on the side faces of the burden placing part when viewed in the direction perpendicular to the running direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hand cart in which a luggage mounting portion is provided on a body frame provided with front and rear wheels.

[0002]

2. Description of the Related Art In general, a hand cart for carrying luggage is conventionally known as a luggage carrier such as a rear car. Also, in factories, workplaces, and the like, a luggage loading cart driven by a motor or an engine is used. Carts provided with these drives are normally prohibited from running on public roads and are used exclusively in closed places or areas.

[0003] A motor-driven cart of this type is based on a hand-drawn cart and is provided with a driving motor, and usually controls the traveling by an on / off switch.

[0004] On the other hand, anyone who can run on public roads, such as a cultivator, requires a predetermined driver's license, so that no one can use it easily and easily.

[0005] On the other hand, recently, with changes in regulations such as road traffic laws and regulations, as in the case of electric bicycles, for example, auxiliary power for driving a motor has been recognized as long as it assists running on public roads by human power. In the case of this electric bicycle, so-called electric assist is recognized within a range of not more than 20 meters per hour and the motor not running by itself.

[0006]

As described above, the motor-driven luggage-carrying cart cannot travel on public roads. However, even in the case of a hand cart, heavy objects may be conveyed, so if the above-mentioned motor-driven auxiliary power, which does not require a license, can be applied to the hand cart, the cart can travel on public roads and be used. Labor saving efforts have been made for the elderly, leading to speculation that it may be particularly advantageous for women, women and the elderly.

Accordingly, the present invention proposes an electric assisted hand cart for loading cargo, in which a motor driven auxiliary power device, that is, a power assist drive device is applied to a hand cart.

[0008]

According to the first aspect of the present invention, there is provided a hand cart having a luggage mounting portion on a body frame provided with front and rear wheels, wherein a motor is provided behind the luggage mounting portion. A power assisted hand cart for carrying luggage, wherein a power assist drive device is provided and a drive wheel driven by the drive device is provided as a rear wheel.

As described above, when the power assist driving device is provided behind the luggage mounting portion, the hand pushing operator is located at the rear portion. Handling and the like can be facilitated, and the wiring between the operation unit and the driving device can be shortened as much as possible. Furthermore, since the rear wheels are driven instead of the front wheels, the drive link between the power assist drive device at the rear and the rear wheels is shortened, so that the drive system can be labor-saving and streamlined.

According to a second aspect of the present invention, in the first aspect of the present invention, there is provided a luggage-equipped hand-assisted cart in which the drive wheels are formed to have a larger diameter than the front wheels.

Usually, there are undulations and steps on the road, and the cart has to climb over these. When the driving wheels, that is, the rear wheels are formed to have a larger diameter than the front wheels, as described above, the wheels on the operating side have a large diameter, so that the vehicle can easily go over even if there are undulations or steps on the traveling road. That is, since the power assist drive device is provided behind the luggage loading unit, a load is applied to the rear wheel rather than the front wheel, and therefore, when traveling, the front wheel that encounters ups and downs or a step on the traveling path is replaced with a large diameter rear wheel. With the fulcrum as a fulcrum, it can be easily lifted. In addition, a large reduction ratio from the motor to the wheels can be adopted, and the motor drive current can be reduced, thereby saving energy. Further, when the motor is linked to the drive wheels, a larger diameter can provide a larger motor installation space than a smaller diameter. Note that forming the rear wheel with a larger diameter than the front wheel
By making the front wheel small, the small front wheel lowers the center of gravity and makes it difficult to fall down. In addition, the load carrying portion can be made low, and the loading and unloading of the load is facilitated.

According to a third aspect of the present invention, in the first aspect of the present invention, the vehicle body frame of the luggage mounting portion is extended rearward, and the driving device is installed on the extended frame. It is an electric assisted hand cart.

Since the luggage mounting section usually has a vehicle body frame, it is structurally convenient to use this frame, that is, to extend the vehicle body frame as it is, and to install the driving device on the extended frame. It is.

According to a fourth aspect of the present invention, in the first aspect of the present invention, there is provided a luggage-mounted electric assisted hand cart having a pair of left and right drive wheels and a motor provided for each drive wheel. is there.

As described above, since the motors are provided for the left and right driving wheels, each driving wheel is driven independently. By changing the driving of each driving wheel, not only the straight running but also the left turning is performed. Alternatively, a right turn can be appropriately performed.

According to a fifth aspect of the present invention, in the first aspect of the invention, the electric assist wheel for loading a luggage is provided in which the outer position of the drive wheel is substantially the same as or the inner side of the lateral side of the luggage mounting portion. It is a cart.

As described above, if the outer position of the drive wheel is provided substantially the same as or inside the lateral surface of the luggage mounting portion, it is possible to prevent the drive wheel from coming into contact with a person when traveling on a public road, thereby ensuring safety. Can be secured.

According to a sixth aspect of the present invention, in the first aspect of the present invention, the driving wheels as the front wheels and the rear wheels overlap with the side surface of the luggage mounting portion when viewed from a direction perpendicular to the traveling direction. This is an electric assisted cart for loading luggage, which is provided at a position where it is not necessary.

As described above, since the front wheel and the rear wheel are provided so as not to overlap with the side portions of the luggage mounting portion, when loading and unloading the luggage from the side portions of the luggage mounting portion, the front and rear wheels are used for loading and unloading. It will be possible to carry out the work smoothly without getting in the way.

According to a seventh aspect of the present invention, in the first aspect of the invention, the luggage mounting portion is covered by a case body provided with an opening / closing door, and at least one of the opening / closing doors is provided by the This is an electric assisted hand cart for carrying luggage, which is configured to open and close with the top of the case body as a fulcrum.

Since the luggage mounting portion is covered by the case body, the luggage is protected from the outside by being protected from the outside. Furthermore, if the opening and closing door is configured to open and close around the top of the case body, the door does not move in the horizontal direction when opening and closing, so for example, even in a narrow place, the door does not catch Can be put in and out.

According to an eighth aspect of the present invention, in the first aspect of the present invention, the luggage mounting portion is a luggage-mounted electric hand cart having two upper and lower mounting spaces.

As described above, by providing the upper and lower mounting spaces in the luggage mounting portion, the space in the luggage mounting portion can be effectively used.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to specific examples shown in the drawings.

FIG. 1 is a side view showing an electric assisted hand cart according to the present invention, FIG. 2 is a plan view of the cart, FIG. 3 is a view of the cart viewed from the front wheel side, and FIG. FIG. 5 is a schematic perspective view of the cart.

As shown in FIGS. 1 to 5, the electric assisted hand cart 1 of this embodiment has a motor M
The power assist drive device (controller) 3 provided with is provided.

The luggage mounting section 2 includes body frames 21 and
2 and 23 are provided to form a frame, and this frame is covered with a case body 24.

The vehicle body frame includes a lower body frame 21.
And the body frame 2 erected on the body frame 21
2. A vehicle body frame 23 is provided in the middle of the vehicle body frame 22, and the vehicle body frames 21, 22, 2
3, the loading space S in the upper and lower tiers in the luggage
1, S2 are provided. In this example, the mounting space S
Cases K and K containing milk bottles are placed in S1 and S2.

Further, the lower body frame 21 is extended rearward, and the driving device 3 is installed on the extended frame 21a. In this example, the frames 21a are provided on the left and right, each frame 21a is branched up and down, and the motor M is mounted between these branched frames.

The motors M, M are controlled in forward and reverse rotations by a power assist drive device 3, and a battery B as a power supply is disposed near the motor M. This battery B is detachably installed.

The power assist driving device 3 is a driving force assisting device similar to that of the electric bicycle described above, detects the pressing force of the operator at the time of manual pressing, and outputs a driving force proportional to the pressing force.

In this embodiment, the left and right handles 4 and 4 are provided independently of each other, and each handle 4 is provided with a throttle grip 41. When the operator presses the throttle grip 41 during manual pressing, the pressing force is detected to control the motor output. When the throttle grip 41 is pulled backward, the motor rotates in the reverse direction, and power assist is performed in accordance with the pulling force.

The motor M is connected to the frame 21 as described above.
The rear wheel 5 which is a driving wheel is provided via a reduction gear G outside the frame 21a.
In addition, a front wheel 6 is provided at a lower front portion of the lower body frame 21.
Is provided. These front and rear wheels 5, 5 are provided as a pair on the left and right, respectively.

Since the left and right rear wheels 5 and 5 are provided with motors M, respectively, the rear wheels are independently driven. First, a left turn or a right turn can be appropriately performed.

Further, the rear wheel 5, which is a driving wheel, is formed to have a larger diameter than the front wheel 6, and the outer position of the rear wheel 5 is provided substantially the same as or inside the lateral side surface of the luggage mounting portion 2. .

As described above, when the rear wheel 5 is formed to have a larger diameter than the front wheel 6, since the operation side wheel has a large diameter, it is possible to easily get over the road even if there are undulations or steps on the traveling road. Also,
When the motor M is linked to the drive wheels, a larger diameter can provide a larger motor installation space than a smaller diameter.
When the rear wheel 5 is formed to have a larger diameter than the front wheel 6 and the front wheel 6 is made smaller, the center of gravity is lowered and it is difficult to fall down. Facilitated.

Further, the outside position of the rear wheel 5 is
Is provided on the inner side than the lateral side of the vehicle, so that the rear wheel 5 can be prevented from contacting a person when traveling on a public road, for example, thereby ensuring safety.

Further, since the power assist driving device 3 is installed behind the luggage mounting portion 2 as in the present embodiment, the hand pushing operator located at the rear and the power assist driving device 3 come close to each other and drive. In some cases, confirmation and handling of the device can be easily performed, and the wiring between the operation unit and the driving device can be reduced as much as possible. Further, since the rear wheels 5 are driven, the drive linkage between the power assist drive device 3 at the rear and the rear wheels 5 is shortened, so that the driving system can be labor-saving and rationalized.

In this embodiment, the support portions 61 of the front wheels 6, 6 are provided rotatably with respect to the vehicle body frame 21. Therefore, when moving forward, as shown by the solid line in FIG. As shown by the imaginary lines in FIG.

In the drawing, reference numeral 7 denotes a traveling brake, and 8 denotes a parking brake used when the vehicle is stopped. A basket 9 is provided between the handles 4 and 4. Since the basket 9 is provided in the vicinity of the operator, it is convenient to store small items.

Further, as shown in FIG. 6, the case body 24 covering the luggage mounting section 2 is provided with opening and closing doors 25 and 26.
The one opening and closing door 25 opens and closes via a hinge (not shown) with the top of the case body 24 as a fulcrum. The other opening / closing door 26 opens and closes via a hinge (not shown) provided at a position of the lower body frame 21.

As in the present example, the luggage mounting section 2 is
When it is covered with 4, the luggage is shielded from the outside world and protected. In particular, as in the case of one opening / closing door 25, the case body 2
If it is configured to open and close with the top of 4 as a fulcrum, the door does not move in the horizontal direction at the time of opening and closing, so for example, even in a narrow place, it is possible to carry out luggage without getting caught by the door. it can.

In order to use the above-described electric assisted hand cart 1 of this embodiment, the main key is turned on, and the throttle grips 41 of the left and right handles 4 are gripped. When the operator presses the throttle grip 41 to move forward, the pressing force is detected, and the motor output is controlled in proportion to the pressing force. When the operator pulls the throttle grip 41 forward to move backward, the motor rotates in the reverse direction, and power assist is performed according to the pulling force. When stopping, the brake 7 is operated, and when loading / unloading of goods is performed at that position, the parking brake 8 is used.

It is a matter of course that the luggage-mounted electric hand cart of the present invention is not limited to the above-described embodiment. For example, the driving device 3 provided on the frame 21a is replaced with the frame 21a. Can be attached to and detached from the body frame 21 so that the left and right handles can be integrated with each other, the left and right handles can be integrated, and an assist force detection method different from the throttle grip can be used. And other appropriate changes may be made.

[0045]

As described above, the invention described in the first aspect of the present invention relates to a hand cart in which a luggage mounting portion is provided on a body frame provided with front and rear wheels, and a motor behind the luggage mounting portion. A power assisted hand cart for carrying luggage, in which a power assist drive device provided with is installed, and a drive wheel driven by the drive device is provided as a rear wheel.

When the power assist drive device is provided behind the luggage loading section, the hand pushing operator is located at the rear portion, so that the operator and the power assist drive device are close to each other, and it is easy to confirm and handle the device at the time of driving. In addition, the wiring between the operation unit and the driving device can be reduced as much as possible. Further, since the rear wheels are driven, the drive linkage between the power assist drive device at the rear and the rear wheels is shortened, so that it is possible to save labor and rationalize the drive system.

According to a second aspect of the present invention, in the first aspect of the present invention, there is provided an electric assisted cart for loading luggage, wherein the drive wheels are formed to have a larger diameter than a front wheel.

As described above, when the rear wheel is formed to have a larger diameter than the front wheel, the wheel on the operating side has a large diameter, so that the vehicle can easily get over even if there are undulations or steps on the traveling road. In addition, a large reduction ratio from the motor to the wheels can be adopted, the motor drive current can be reduced, and energy saving can be achieved. Further, when the motor is linked to the drive wheels, a larger diameter can provide a larger motor installation space than a smaller diameter.
And when the rear wheel is formed with a larger diameter than the front wheel and the front wheel is made smaller, it lowers the center of gravity and makes it difficult to fall over,
In addition, the luggage mounting portion can be lowered, so that luggage can be easily taken in and out.

According to a third aspect of the present invention, in the first aspect of the present invention, the vehicle body frame of the luggage mounting portion is extended rearward, and the driving device is installed on the extended frame. It is an electric assisted hand cart.

As described above, it is convenient in terms of structure if the driving device is installed on the extended frame using the body frame of the luggage mounting portion.

According to a fourth aspect of the present invention, in the first aspect of the present invention, there is provided a luggage-mounted electric hand cart with a pair of left and right drive wheels and a motor provided for each drive wheel. is there.

As described above, since the motor is provided for each of the left and right driving wheels, each driving wheel is driven independently. By changing the driving of each driving wheel, not only the straight running but also the left turning is performed. Alternatively, a right turn can be appropriately performed.

According to a fifth aspect of the present invention, in the first aspect of the invention, the electric assist wheel for loading a luggage is provided in which the outer position of the drive wheel is provided substantially the same as or inside the lateral side of the luggage mounting portion. It is a cart.

As described above, when the outer side of the drive wheel is provided substantially the same as or inside the lateral side of the luggage mounting portion, it is possible to prevent the drive wheel from coming into contact with a person when traveling on a public road, thereby ensuring safety. Can be secured.

According to a sixth aspect of the present invention, in the first aspect of the present invention, the driving wheels as the front wheels and the rear wheels overlap the side surfaces of the luggage mounting portion when viewed from a direction perpendicular to the traveling direction. This is an electric assisted cart for loading luggage, which is provided at a position where it is not necessary.

As described above, the front and rear wheels are provided so as not to overlap with the side portions of the luggage mounting portion. Therefore, when loading and unloading the luggage from the side portions of the luggage mounting portion, these front and rear wheels are used for loading and unloading. It will be possible to carry out the work smoothly without getting in the way.

According to a seventh aspect of the present invention, in the first aspect of the invention, the luggage mounting portion is covered by a case body provided with an opening / closing door, and at least one of the opening / closing doors is provided by the case. This is an electric assisted hand cart for carrying luggage, which is configured to open and close with the top of the case body as a fulcrum.

Since the luggage mounting portion is covered by the case body, the luggage is protected from the outside by being protected from the outside. Furthermore, if the opening and closing door is configured to open and close around the top of the case body, the door does not move in the horizontal direction when opening and closing, so for example, even in a narrow place, the door does not catch Can be put in and out.

According to an eighth aspect of the present invention, in the first aspect of the present invention, the luggage mounting portion is a luggage-mounted electric assisted hand cart having two upper and lower mounting spaces.

As described above, by providing the upper and lower mounting spaces in the luggage mounting portion, the space in the luggage mounting portion can be effectively used.

[Brief description of the drawings]

FIG. 1 is a side view showing an electric assisted cart according to the present invention.

FIG. 2 is a plan view showing an electric assisted hand cart according to the present invention.

FIG. 3 is a view of the electric assisted hand cart according to the present invention as viewed from the front wheel side.

FIG. 4 is a view of the electric assisted hand cart according to the present invention as viewed from the rear wheel side.

FIG. 5 is a schematic perspective view of an electric assisted hand cart according to the present invention.

FIG. 6 is a schematic perspective view showing a luggage mounting portion of the electric assisted hand cart according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electric hand cart 2 Luggage loading part 3 Power assist drive (controller) 4 Handle 5 Rear wheel 6 Front wheel 7 Brake 8 Parking brake 9 Basket 21 Body frame 21a Frame 22 Body frame 23 Body frame 24 Case body 25 Opening / closing door 26 Opening / closing Door 41 Throttle grip 61 Support (front wheel) B Battery G Reduction gear K Case M Motor S1 Mounting space S2 Mounting space

Claims (8)

[Claims] 1. A hand cart having a luggage mounting portion provided on a body frame provided with front and rear wheels, wherein a power assist driving device having a motor is installed behind the luggage mounting portion and driven by the driving device. An electric assisted cart for loading luggage, wherein a driving wheel is provided as a rear wheel. 2. The cart according to claim 1, wherein the drive wheels have a larger diameter than the front wheels. 3. The cart according to claim 1, wherein a body frame of the luggage mounting portion extends rearward, and the driving device is installed on the extended frame. 4. The cart according to claim 1, wherein a pair of left and right drive wheels are provided, and a motor is provided for each drive wheel. 5. The cart according to claim 1, wherein an outer position of the drive wheel is provided substantially at or inside a lateral side of the luggage mounting portion. 6. The vehicle according to claim 1, wherein the front and rear drive wheels are provided so as not to overlap a side surface of the luggage mounting portion when viewed from a direction perpendicular to a traveling direction. Electric assisted cart for loading luggage. 7. The luggage mounting section is covered by a case body provided with an opening / closing door, and at least one of the opening / closing doors opens and closes around a top of the case body as a fulcrum. The electric assisted hand cart for loading luggage according to claim 1. 8. The cart according to claim 1, wherein the luggage mounting section has two upper and lower mounting spaces.