JP3197342U - Electric two-wheel cart - Google Patents

Abstract

An electric two-wheel cart that can be driven easily and electrically while maintaining a weight balance between the front and rear. The front and rear of the loading platform 1 positioned higher than the wheels about the axles 9 of the left and right wheels 10 rotate, and the driver balances the loading platform up and down with a front handle provided in front of the loading platform. In a two-wheel cart that transports a vehicle, a heavy battery 14 and other members including a drive motor 13 and a transmission are disposed in the lower space of the loading platform so as to be opposite to each other around the axle. In addition to providing a position adjustment mechanism for moving the battery position back and forth, an operation unit is provided on the front handle in conjunction with the motor and the battery to operate rotation start / stop and rotation speed of the wheels. [Selection] Figure 2

Description

  The present invention relates to a two-wheel cart that is pulled by a person and carries a load.

In a large-scale fish market where the passage between the arranged products is narrow and the products need to be moved frequently with small mouths, two small wooden carts (large eight-wheeled vehicles or Called a small car).
The cart has a height of about 50 cm and is lower than a person's waist, so it is easy to load and unload luggage, and since it is a two-wheeler, it can be turned slightly, so it is very convenient for unloading in a narrow place. However, it requires labor for transportation due to human power, and it is difficult to climb an inclined surface. The two-wheeled vehicle is unstable in front and rear and easily collapses. There is no brake, so there is too much momentum to control. There are difficulties such as the possibility of becoming.

On the other hand, the invention of a cart that rotates a wheel with a motor is disclosed in Patent Document 1 below. In the present invention, since the number of wheels is one, it is necessary to ensure the stability of the cargo bed by the caster wheels provided on the left and right sides of the front side of the wheel, but there is an advantage that the load can be easily transported by the power of the motor.
However, in the present invention, it is impossible to load and unload luggage from the rear side by grounding the rear side of the loading platform. Therefore, in order to frequently load and unload heavy luggage such as tuna as is done in the fish market. Not suitable. In addition, if the load is placed behind the wheels, the caster wheel in front of the load will float up and the loading platform will become very unstable, and there is a risk that a load drop accident will occur.

JP-A-8-207774

  Therefore, the present invention eliminates the labor of the person for transportation with the power of the motor while taking advantage of the ease of loading and unloading work of carts by conventional human power such as Daihachi and the power of the motor. An object of the present invention is to provide an electric two-wheel cart that can easily carry a heavy load.

  In order to achieve the above-mentioned object, the electric two-wheel cart of the present invention is driven by a front handle provided in front of the load platform, with the front and rear of the load platform positioned higher than the wheels rotating around the axles of the left and right wheels. In a two-wheel cart that carries a load while balancing the front and back of the loading platform up and down, the lower space of the loading platform includes a heavy battery, other drive motors and other components including the mission, etc. A position adjustment mechanism is provided that is arranged so as to be opposite to each other about the axle and that moves the position of the battery back and forth, and is linked to the motor and battery to start, stop, and rotate the rotation of the wheel. An operating portion for operating the is provided on the front handle.

  The invention according to claim 2 is characterized in that, in the above invention, the center of gravity of the entire cart including the battery is adjusted by a position adjusting mechanism so that the center of gravity is located immediately above the axle and deviated to the front side.

  The invention of claim 3 is characterized in that, in the above invention, a differential gear is provided on the axle.

  According to a fourth aspect of the present invention, in the above-mentioned device, a clutch for electrically switching between free wheel rotation and electric rotation by the motor is provided on the axle, and a lever for switching the clutch is provided on the front handle. Features.

  According to a fifth aspect of the present invention, in the above-mentioned device, a loading platform frame that supports the loading platform is attached to a lower portion of the loading platform, and both side handles that protrude from both sides of the loading platform frame to the front are provided. The front handle is installed at the front end of the both side handles, and a wheel support frame having left and right bearings is fixed to the lower part of the left and right sides of the loading frame, and left and right wheels are provided at the bearings. It is characterized by having supported the axle.

  The invention of claim 6 is the above-mentioned invention, wherein the lower side of the wheel and the lower part of the front handle are below the line connecting the lower side of the front handle and the lower side of the wheel. A stand having a lower end projecting downward so as to be above the line is provided on the cargo frame or the side handle.

  According to a seventh aspect of the present invention, in the above-described device, rear side handles having a length that a person cannot enter between the left and right side portions on the rear side of the load carrier frame are projected obliquely upward in a bent state. A rear handle is installed at the front end of the rear side handle.

  The invention of claim 8 is characterized in that, in the above invention, the position adjusting mechanism forms a long hole in the longitudinal direction in the base plate fixed to the wheel support frame, and the battery is provided with a fixing bracket having a bolt hole. Then, a bolt that can be fastened in a free position is inserted into the long hole through the bolt hole of the fixing bracket, and by loosening and tightening a nut screwed to the bolt, the battery mounting position can be moved back and forth and fixed. It is characterized by that.

  The invention according to claim 9 is the slider according to the above invention, wherein the position adjusting mechanism is provided with a rail gripping portion which is provided with a rail in the front-rear direction on a base plate fixed to the axle support frame and which is guided by the rail and moves back and forth. A handle having a bearing hole provided in the center direction of the female screw portion on the base plate, and the slider is fixed with a female screw portion whose center is directed in the slide direction of the rail. A support plate is provided, and a rotating handle having a male threaded portion at the front end of the bearing hole is supported. The male threaded portion is screwed onto the female threaded portion, and the rotation of the rotating handle adjusts the position of the battery back and forth. It is possible to do this.

The electric two-wheel cart of the present invention controls the start, stop, and rotation speed of the wheel by the motor by operating the operation portion provided on the front handle with one's hand while holding the front handle. On the other hand, it can be moved back and forth freely by driving the motor with battery power instead of human power, and even a heavy load can be easily transported.
Also, if the rear side of the loading platform is heavy, the front handle will rise, so it will be pulled down by hand, and if the front side is heavy, the front handle will be lowered so that it will be operated to lift by hand. In the lower space, a heavy battery and other members including a drive motor and its mission are arranged so as to be opposite to each other with the axle as a center, and to the front and rear of the heavy battery. Since the position adjustment mechanism is provided, the position of the center of gravity including the battery can be adjusted back and forth about the position directly above the axle.
Further, when loading a load, the position of loading is important for obtaining a weight balance between the front and the back. For this reason, loading is performed in consideration of the weight centering on the position on the loading platform with the wheels.
And when loading a lot of luggage in front of the loading platform, move the position of the heavy battery to the rear to balance the whole center of gravity including the luggage on the axle, and load a lot of luggage after the loading platform. In such a case, it is possible to easily carry a load whose weight is biased back and forth by moving the position of the battery to the rear and balancing it so that the entire center of gravity including the load comes on the axle.
When transporting the vehicle, the user operates the vehicle by turning the weight of the front handle by hand or lifting the weight to feel the balance of weight. This weight balance is adjusted so that the center of gravity including the load comes close to the wheels, so even with a heavy load, the level of the loading platform can be maintained just by lightly touching the front handle. It can be done very easily by the power of.
Also, when not in use, when the front side of the loading platform is raised, the center of gravity W moves to the rear side beyond the vertical line Y just above the axle, and the state where the back is lowered as if leaning is maintained. As shown in FIG. 8, it becomes possible to store a large number in the same direction in a compact place.

The invention of claim 2 is a state in which no load is loaded by adjusting the position adjustment mechanism so that the center of gravity of the entire cart including the battery is positioned near the top of the axle and biased to the front side. A person who enters between the handles on both sides can keep the loading platform horizontal by touching the front handle and further move the hand of the front handle lightly to the left and right. It becomes possible.
When there is no load, the center of gravity W is near a vertical line (indicated by a dot-and-dash line in FIG. 2) extending upward from the center of the axle, so that the center of gravity W exceeds the vertical line Y. , The center of gravity moves to the direction beyond, the direction of the center of gravity is lowered, and the state is maintained.
The present invention arranges a heavy battery so that the center of gravity reaches a position close to the front of the axle and a position biased to the front side when the loading platform is in a substantially horizontal state, so that the loading platform is placed in a substantially horizontal state in the front-rear direction. When this happens, the front handle will continue to work in the front-down state.
For this reason, when the driver puts the hand holding the front handle to the waist position, the loading platform naturally becomes substantially horizontal in the front-rear direction, so that it is possible to drive in an easy state where the front handle is pulled up by hand. .

  According to the invention of claim 3, the differential gear mounted on the axle enables the two wheels to be rotated in the opposite directions around the center of the axle, so that it is easy to make a small turn or change of direction on the spot. Can be performed.

  According to the invention of claim 4, by operating the clutch switching lever, the free rotation of the wheel and the electric rotation by the motor can be easily switched electrically. Therefore, if the battery runs out, the wheel is switched to the free rotation. As a result, the motor driving can be switched to the manual traction, and the conveyance can be continued without being unable to proceed.

According to the invention of claim 5, the loading platform is supported by the loading platform frame from the lower part, and it is possible to prevent the loading platform from being deformed or damaged even when a heavy load is loaded.
Further, since both side handles protrude integrally from the cargo bed frame, the both side handles are firmly fixed to the cargo bed frame, and the front handle erected at the front end of the both side handles is also firmly attached to the cargo bed frame. Fixed to.
Further, since the left and right bearing portions are securely fixed to the wheel support frame fixed to the lower part of the loading platform frame, the left and right wheel axles supported by the bearing portion are securely supported, and the loading platform has a large weight. Even if a baggage is loaded, the wheels can be stably rotated to enable safe transportation.

According to the sixth aspect of the present invention, when the front of the loading platform is lowered, the lower ends of the lower stands on both sides on the front side of the loading platform frame hit the ground, and when the hands are released from the front handle, It is possible to keep the upper surface of the loading platform in a substantially horizontal state in which the front side is lowered without the front side jumping up, and stably hold the load placed on the loading platform without collapsing.
In addition, since the front handle is held at a certain height away from the ground, it is possible to naturally hold the front handle in a posture in which the carrier entering between the handles on both sides stands.

In the invention of claim 7, when the rear portion of the loading platform is lowered, the side of the rear handle is bent upward after the loading platform, so when the front handle is flipped up, the lower end of the bent portion hits the ground, The rear handle of the rear part rises slightly from the ground. For this reason, it is possible to easily raise the rear side of the cart by inserting a finger from under the handle, grasping the rear handle, and lifting after the person has lifted up.
Further, when the lower end portion of the bent portion of the rear handle hits the ground, it is possible to load or unload the load on the loading platform from a low position where the rear portion of the loading platform is lowered.
At that time, if the load has its center of gravity once slightly beyond the rear handle, and then lowers the front handle to bring the rear side into a substantially horizontal state, it can be easily loaded on the bed without the need for dragging. be able to.

  The invention of claim 8 is to move the position of the battery easily by moving the inside of the long hole of the position adjusting mechanism back and forth by loosening the nut screwed to the screw using a tool such as a spanner. By tightening the nut, the position of the battery can be fixed at the optimum position.

  According to a ninth aspect of the present invention, a slider on which a battery is mounted is guided by a rail provided on a base plate, and a male screw portion formed at a tip portion of the rotary handle is screwed to a female screw portion provided in the slider. Therefore, by rotating the rotary handle, the position of the battery placed on the slider can be easily adjusted to the optimum position without using a tool.

It is a perspective view of the present invention. It is a side view of this invention. It is a bottom view of the present invention. It is a side view which shows the state which lowered the front handle. It is a side view which shows the state which raised the front handle. It is a perspective view which shows the principal part of a position adjustment mechanism. It is a perspective view which shows the principal part of a position adjustment mechanism. It is a side view which shows the accommodation state at the time of arranging many electric two-wheel carts of this invention.

Embodiments of the electric two-wheel cart of the present invention will be described below with reference to the drawings.
As shown in FIGS. 1 and 2, the present invention includes a front handle 4 for a person towing and driving in front of the loading platform 1, and the two wheels under the loading platform with the power of a motor 13 provided under the loading platform 1. The wheel 10 is driven to rotate, and the driver holds the front handle and conveys the load placed on the loading platform 1 while balancing the front and back of the loading platform up and down.
As shown in FIG. 3, the loading platform 1 uses a rectangular flat plate, and a loading platform frame 2 that strongly supports the loading platform 1 so that the loading platform 1 is not deformed or destroyed by the weight of the loading platform 1. Install.
Then, as shown in FIGS. 1 and 2, the left and right side handles 3 of a length that can be inserted by a person are moved slightly diagonally upward with a width that can be inserted by a person. The front handle 4 is erected on both ends of the side handle 3 so as to project in a bent state.
The side handles 3 may be parallel to each other, and may have a shape in which the middle swells outward as shown in FIGS. 1 and 3.

Further, at both ends of the rear part of the loading frame 2, a side handle 5a having a length that does not allow a person to enter the rear side is projected in a slanting upward and rearward direction, and the rear end part of the side handle 5a is bent. In this case, the rear handle 5 is installed by being bent integrally with the side handle 5a.
Then, as shown in FIG. 3, a lateral frame 2 a for reinforcement is installed between the load carrier frames 2 at a predetermined interval in the front-rear direction.

Further, a wheel support frame 6 is provided symmetrically below the both sides of the load carrier frame 2 so as to be vertically parallel to the load carrier frame 2 with a space downward from the lower surface of the load carrier 1. The bearing portions 8 are provided symmetrically to each other.
Then, left and right wheels 10 and 10 are mounted on the tip portions of the bearing portions 8 and an axle 9 provided with a differential gear 11 is supported on the intermediate portion.
Since the differential gear 11 is mounted on the axle 9 and the cart is rotated around the center of the axle 9, the two wheels 10 and 10 rotate in opposite directions around the center of the axle 9, respectively. It is possible to easily rotate and change direction in the field.
The wheels 10 and 10 use small-diameter wheels whose upper end portions do not protrude upward from the loading platform surface because the loading platform 1 is widely used.

  Then, on both sides on the front side of the loading platform frame 2 or the wheel support frame 6 or near the base of the side handle 3, below the line connecting the lower end portion 10a of the wheel 10 and the lower portion of the front handle 4, and the loading platform 1 A stand 7 having a lower end 7a projecting is provided at a position above a parallel line with the loading platform 3 passing through the lower end 10a of the wheel 10 when being horizontal.

As shown in FIG. 3, a front base plate 21 a is provided on the wheel support frame 6 on the front side of the axle 9, and a rear base plate 21 b is fixed on the rear side of the axle 9.
Then, a motor 13 is continuously provided via a transmission 12 that transmits rotation to the axle 9, and the motor 13 is mounted on the front plate 21 a in the space between the cargo bed 1 and the axle support frame 6. .
A battery 14 for operating the motor 13 is mounted on the rear base plate 21b via a position adjusting mechanism 22 that allows the mounting position of the battery 14 to be adjusted back and forth.
That is, in the lower space of the loading platform 1, the heavy battery 14, the other driving motor 13, and a member such as a charger including the transmission 12 are positioned opposite to each other about the axle 9. Arrange.
At that time, as shown in FIG. 2, the heavy battery 14 is mounted at a position where the center of gravity W of the entire cart including the battery 14 is close to the vertical line Y on the center of the axle 9 and biased to the front side. .
The battery 14 is provided with a charger to enable charging to compensate for the reduced power, or a battery 14 with a charging function is used.
The motor 13 connected to the battery 14 by an electric wire is rotated by the electric power of the battery 14, and the rotation is transmitted from the mission 12 to the axle 9 to rotate the left and right wheels.
That is, the wheel 10 is not rotated by manually pulling the cart, but by increasing the horsepower capability of the motor 13 and the supplied power, even the heavy load can be easily transported by the power of the motor 13. It becomes possible to do. And it is possible to easily climb hills that could not be climbed manually.

  The mounting position of the battery 14 is determined by the position adjusting mechanism 22, and at that time, the center of gravity W is close to a vertical line (indicated by a dot-and-dash symbol Y in FIG. 2) extending upward from the center of the axle 9. Therefore, when the center of gravity W exceeds the vertical line Y, the center of gravity moves to the direction beyond the center of gravity W, and the loading platform 1 is lowered in that direction.

  In the above description, the battery 14 and the motor 13 are provided with the position adjustment mechanism 22 on the rear base plate 21b with the axle 9 as the center, and the battery 14 is mounted on the front base plate 21a. Shows a form in which the motor 13 is mounted, but conversely, the position adjusting mechanism 22 is provided on the front base plate 21a, the battery 14 is mounted, and the rear base plate 21b has the above-mentioned position. A configuration in which a motor 13 is mounted is also possible, and both the battery 14 and the motor 13 are disposed on opposite sides of the axle so that the weight does not greatly deviate toward the front or rear side of the axle. Balance the weight so that you can go near the center of gravity.

  And when loading a lot of luggage in front of the loading platform, move the position of the battery back to balance so that the entire center of gravity including the luggage is on the axle, and conversely loading a lot of luggage after the loading platform By moving the position of the battery to the rear and balancing the entire center of gravity including the load on the axle, it is possible to easily carry even loads that are biased back and forth.

When the center of gravity W of the entire cart is mounted at a position eccentric to the front side of the vertical line Y on the center of the axle 9, when the hand is released from the front handle 4, as shown in FIG. However, since the vertical line Y exceeds the front side, the front side is lowered, the stand 7 reaches the ground G, the descent stops, and the state as it is is maintained naturally.
In this embodiment, when the stand 7 reaches the ground G, the front handle 4 is positioned just below the waist by determining the height of the lower end 7a of the stand 7 at a position where the person can hold the front handle 4 with his / her hand. Nearby. At this time, by fixing the side handle 3 with the front handle 4 fixed to the load frame 2 or the wheel support frame 6 in a state where the load platform 1 is almost horizontal, the person who rides on the axle 9 with almost the weight and carries it. The force with which the front handle 4 is pulled up is extremely small, and it is possible to drive while always balancing the front and rear weights in an easy state.

In addition, when the load is placed on the loading platform 1, if the load is loaded so that the center of gravity of the entire load is in front of the center of gravity W of only the cart, the stand 7 is supported even when the hand is released from the front handle. The loading platform 1 can be maintained in a substantially horizontal state.
However, if the load 1 is loaded so that the center of gravity of the entire load 1 is behind the center of gravity W of the cart, the horizontal state of the load bed 1 cannot be maintained, and the load bed 1 is greatly inclined later and the load slides down the slope of the load bed 1. So be careful to avoid that.
Further, as shown in FIG. 5, when the center of gravity W crosses the vertical line Y to the rear side in a state where there is no load, the center of gravity W moves to the rear side and the front jumps up to the base of the side portion 5 a of the handle 5. The lower end portion 5b of the provided bent portion rests on the ground G, and the downward movement stops, and the state is naturally maintained with the front handle raised high.
For this reason, since it is possible to load or unload a heavy object that is difficult to lift by hand from the part of the loading platform 1 that is lowered on the rear side, it is easy to raise and lower the luggage.
Also, when there are a large number of carts of the present invention, as shown in FIG. 8, if they are stood with their backs lowered, they can be closely arranged in a small site and compactly accommodated.

Further, as shown in FIGS. 1 and 2, the motor 13 and the battery 14 are connected to an electric control unit 20 that controls the start, stop, and rotation speed of the wheel 10 by a drive control wiring 15. The electric control unit 20 is connected to an operation unit 36 provided on the front handle 4 by a drive control wiring 15 passing through a metal pipe of the side handle 3.
The operation unit 36 is provided with an advancing / retreating switch 16 and a power key insertion hole 17, and an accelerator grip 19a for adjusting the rotation speed of the motor by gripping and rotating the right grip is provided. Adjust the rotation speed of the motor while holding the grip so that the traveling speed can be changed.

Further, a clutch for switching between free rotation of the wheel 10 and electric rotation by the motor 13 can be provided, and a clutch switching lever for manually performing the operation can be provided.
In this case, by performing an operation of switching the wheel 10 to free rotation with the lever, it is possible to switch from motor driving to manual traction and continue the carrying work when the battery 13 is exhausted.
In addition to the manual clutch switching lever for switching the clutch, a clutch switching switch for switching the free rotation of the wheel 10 and the electric rotation by the motor 13 via the electric operation unit 20 and performing the switching operation. A mode in which 37 is provided is also possible. In this mode, the clutch can be easily switched by operating the switch.

  The front handle 4 or the side handle 3 can be provided with an emergency stop button 18 that urgently stops the rotation of the wheel 10. In this aspect, when the emergency stop button 18 feels a collision of the cart, the fall of the load or the collapse of the cargo, the driver immediately presses the emergency stop button 18 with his / her hand to immediately stop the cart. Crisis can be avoided.

In the present invention, since the wheels are two wheels on the left and right, the position of the center of gravity for obtaining the stability in the front-rear direction is important.
Among the components, the battery 14 has a large weight and allows the installation position to be freely selected. Accordingly, it is possible to freely arrange the front and rear positions of the entire center of gravity at the optimum position using the battery 14 as a balance weight.
The battery 14 to be used has not only one standard but also various sizes and volumes. In order to use these batteries 14 as weights that determine the overall center of gravity, it is difficult to design at a single point from the beginning of manufacture.

Therefore, the present invention is provided with a position adjusting mechanism 22 that can freely adjust the position of the battery 14 back and forth.
The position adjusting mechanism 22 can take various forms. For example, as shown in FIG. 6, for example, a long hole 23 is provided in the rear base plate 21b so that the length of the long hole 23 is long. A model that can move back and forth by way of example is possible.
In this embodiment, a long hole 23 that is longer in the front-rear direction than the axle 9 fixed to the wheel support frame 6 is formed in the base plate 21b.
The battery 14 is fixedly provided with a fixing bracket 26 having a bolt hole, and a bolt 24 that passes through the elongated hole 23 and can be fastened in a free position is passed through the bolt hole of the fixing bracket 26 to the elongated hole 23. Plug in.
In this embodiment, the nut 25 screwed to the bolt 24 is loosened to freely move the mounting position of the battery 14 back and forth, and when the position is determined, the nut 25 is tightened to fix the mounting position of the battery 14. it can.

Further, for example, as shown in FIG. 7, the position adjusting mechanism 22 can move the position by the rotation of the rotary handle 34.
In this embodiment, a base plate 21b on the rear side of the axle 9 fixed to the axle support frame 6 is provided with a rail 27 in the front-rear direction and a slider 29 provided with a rail gripping portion 28 that is guided by the rail 27 and moves back and forth. .
A battery 14 is placed on the slider 29, and a female screw portion 30 is fixedly provided with its center directed in the rail sliding direction.
A handle support plate 32 having a bearing hole 33 provided in the center direction of the female screw portion 30 is provided on the base plate 21b, and a crank-type rotary handle 34 having a male screw portion 31 at the tip is provided in the bearing hole. The male threaded portion 31 is screwed onto the female threaded portion 30 while being supported by the shaft 33.
In this embodiment, the position of the battery 14 can be adjusted back and forth by the rotation of the rotary handle 34.

7 illustrates the crank-type rotary handle 34. However, the rotary handle 34 is not bent to the crank, and even if a handle rotary shaft that is linearly connected to the male screw portion 31 is simply provided with a grip, it is effective manually. It only needs to be able to rotate.
Further, it is possible to adopt a mode in which a long bolt having the male screw portion 31 is used in place of the rotary handle 34 and the position of the battery 14 can be adjusted in the front-rear direction by rotating the bolt head with a tool.

In the present invention, as shown in FIG. 2, the position adjustment mechanism 22 as described above freely adjusts the position of the battery 14 back and forth so that the center of gravity W of the entire cart including the battery 14 is located above the center of the axle 9. It can be moved and fixed to a position close to the vertical line Y and a position biased to the front side.
As a result, even if a heavy load is loaded, it is possible to easily balance the front and rear during the transportation of the load by reloading the load so that the center of gravity of the load is at that position with the wheel as a mark. It will be possible to carry your luggage easily.

(Example)
Next, an embodiment of the present invention will be described. In addition, the numerical value which shows the size of each part of a present Example is an example, Comprising: This invention is not limited to the numerical value.

The loading platform 1 is made of hard PP resin, is processed into a long rectangular shape with a length of 1800 mm and a width of 700 mm, and a flat plate with a thickness of 15 mm is used to obtain the strength of the plate.
And the said loading frame 2 is fixed in the left-right parallel to the side part lower surface of the said loading bed 1 using the thing made from an iron pipe of 30 mm diameter and 1700 mm in length.
Further, on the front side of the carrier frame 2, side handles 3 and 3 made of iron pipe having a diameter of 30 mm and a length of 800 mm are symmetrically provided with a width of 700 mm so that the left and right sides are substantially parallel and obliquely upward at an angle of 10 degrees. The base end portion is fixed to the front end portion of the loading frame frame 2 by welding.
Then, a front handle 4 made of an iron pipe with a diameter of 30 mm is horizontally passed to both tip portions of the side handles 3 and 3, and the respective connection portions are fixed by welding.

Further, a side handle 5a is provided at the rear portion of the load carrier frame 2 so as to be bent upward at an angle of 30 degrees so as to have a length of about 200 mm, and an iron pipe having a diameter of 30 mm is provided at the tip of the side handle 5a. The rear handle 5 is made integrally with the side handle 5a.
The carrier frame 2 having a length of 1700 mm, the side handle 3 having a length of 800 mm, and the side handle 5a having a length of 200 mm should be integrally formed using one iron pipe having a diameter of 30 mm and a length of 2700 mm. You can also.
As a result, as shown in FIG. 3, when the loading platform tilts 25 degrees later, the rear handle 5 rises away from the ground at an angle of 5 degrees, and the lower end portion 5 b of the bent portion hits the ground G.
The contact portion with the ground G is welded to the lower end of the bent portion in order to protect the iron pipe from abrasion and damage.

  In addition, a wheel support frame 6 made of a steel pipe having a diameter of 30 mm is symmetrically provided below the both sides of the loading platform frame 2 so as to be parallel to the loading platform frame 2 at a distance of about 220 mm below the lower surface of the loading platform 1. The wheel support frame 6 is provided with bearing portions 8 symmetrically at substantially intermediate portions of the wheel support frames 6, and left and right wheels 10, 10 are attached to the tip portions of the both bearing portions 8. An axle 9 provided with a differential gear 11 is supported on the part.

The wheels 10 and 10 to be mounted on the bearing portion 8 are made of rubber tires, and the left and right wheels 10 and 10 having a small diameter of 460 mm are used so that the upper end portion does not protrude upward from the loading surface in order to use the loading platform 1 widely. .
As shown in FIG. 2, the stand 7 can be a stand 7 in which a 30 mm diameter iron pipe is curved. As shown in FIG. 4, the projecting lower end portions 7 a of the left and right stands 7 determine a length to project so that the front handle 4 is positioned at a high position of about 400 mm when contacting the ground G.
When the stand 7 is separated from the ground G and the loading platform 1 is substantially horizontal as shown in FIG. 2, the left and right side handles 3 and 3 are slightly raised and inclined forward. Is a position about 600 mm higher, and this position is a position that a driver can stand and naturally hold by hand.
Since the lowermost part of the stand 7 often comes in contact with the ground G so as to rub, a metal abutment plate is welded to protect the iron pipe.

  Moreover, the load slip prevention body 1b of the side higher than the upper surface of the loading platform is provided on the side of the loading platform 1. For example, the anti-slip body 1b on the side portion is formed of a PP resin having a thickness of 15 mm, a length of 1800 mm, and a width of 100 mm using a long and thin rectangular plate, and is superposed and screwed along the side surface of the upper surface of the loading platform 1. It is attached.

Also, as shown in FIG. 3, a rectangular front base plate 21a is installed on the left and right wheel support frames 6 on the front side of the axle 9 using a 2 mm thick iron plate, and on the rear side of the axle 9. Uses a 2 mm thick steel plate to construct a rectangular rear base plate 21b.
Then, the motor 13 connected through the transmission 12 that transmits the rotation to the axle 9 is fixed on the front base plate 21a.
A position adjusting mechanism 22 for moving the battery 14 back and forth is provided on the rear base plate 21b, and the battery 14 for operating the motor 13 is mounted so that the position adjusting mechanism 22 can adjust the position back and forth. To do.
At that time, the position adjustment is performed so that the center of gravity of the entire cart including the battery 14 is located at a position close to a position directly above the axle 9 and biased to the front side.

Further, as shown in FIGS. 1 and 2, the motor 13 and the battery 14 are provided on the front handle 4 via an electric control unit 20 that controls the start, stop, and rotation speed of the wheel 10 by the motor 13. The operation unit 36 is electrically connected.
The electric control unit 20 and the operation unit 36 are connected by a drive control wiring 15 that passes through the metal pipe of the side handle 3 so as not to obstruct the operation.
Further, the motor 13 mounted for rotating the wheel 10 is a motor having a capacity capable of obtaining a speed of about 10 km / h even when a load of about 100 kg is placed on the loading platform 1. Use a sealed battery with a weight of about 20 to 30 kg that does not leak and can be charged with a household power supply.

The operation section 36 provided on the front handle 4 is provided with an advance / retreat switch 16 for changing the rotation direction of the wheel 10, an emergency stop button 18 for forcibly decelerating and stopping the rotation of the wheel, and a grip on the right grip. An accelerator grip 19a that adjusts the rotational speed of the motor 13 by rotating the motor 13 is provided. In addition, in FIG. 1, the aspect which provided the battery residual amount display part 19b of the liquid crystal screen connected with the accelerator grip 19a is shown.
In addition, a clutch for switching between the free rotation of the wheel 10 and the electric rotation by the motor 13 by electromagnetic operation is provided, a switch 37 for performing the switching operation is provided, and an emergency stop button 18 for urgently stopping the rotation of the wheel 10 is provided. .
It should be noted that a part of the switches provided in the operation unit 36 can be distributed in the side handle 3.

In addition, the load slip prevention body 1b of the side part higher than the load-table upper surface can be provided in the side part of the load bed 1. FIG. For example, as shown in FIG. 1, the side anti-slip body 1 b is attached by overlapping and screwing along the side of the upper surface of the loading platform 1 using an elongated rectangular flat plate.
Further, an obliquely upward load slip prevention body 1 a can be provided on the front side of the loading platform 1. The anti-slip body 1a prevents the tuna from sliding forward when the tuna is piled forward so that the sharp heel is stuck in the driver's back. In FIG. 2, the aspect of the anti-slip body 1a with the front inclined high is shown.
Since the load slip prevention bodies 1a and 1b lower the load from above, it is difficult to exceed the load if it is excessively high. Therefore, it is preferable to select an optimum height according to the load to be handled.

  The present invention is an electric two-wheeled cart that a person walks and drives. However, a flat cargo bed can be provided as a rear car with a luggage enclosure fence around it.

DESCRIPTION OF SYMBOLS 1 Loading platform 1a Front load slip prevention body 1b Side load slip prevention body 2 Loading platform frame 2a Side frame 3 Side handle 4 Front handle 5 Rear handle 5a Rear side handle 5b Lower end of the bent portion of the rear handle 6 Wheel support frame 6a Horizontal frame 7 Stand 7a Stand lower end portion 8 Bearing portion 9 Axle 10 Wheel 10a Wheel lower end portion 11 Differential gear 12 Mission 13 Motor 14 Battery 15 Drive control wiring 16 Advance / Reverse switch 17 Power key insertion hole 18 Emergency stop button 19 Grip 19a Accelerator grip 19b Battery remaining amount display unit 20 Electric control unit 21a Front base plate 21b Rear base plate 22 Position adjustment mechanism 23 Long hole 24 Bolt 25 Nut 26 Fixing bracket 27 Rail 28 Rail gripping part 29 Slider 30 Female thread part 31 Male thread part 32 Hand Lubricating plate 33 Bearing hole 34 Rotating handle 35 Rotating handle grip 36 Operating section 37 Clutch switching switch W Center of gravity T Cart vertical line G on the center of axle

In order to achieve the above-mentioned object, the electric two-wheel cart of the present invention is driven by a front handle provided in front of the load platform, with the front and rear of the load platform positioned higher than the wheels rotating around the axles of the left and right wheels. person in the two-wheel carts carrying luggage while balancing the front and rear loading platform up and down in the lower space of the loading platform, and a large battery weight, a member comprising the other drive motor and its mission, the A position adjustment mechanism is provided that is opposite to each other about the axle and that moves the position of the battery back and forth, and is linked with the motor and battery to start, stop, and rotate the rotation of the wheels. The operation part to operate is provided in the front handle.

Claims (9)

The front and rear of the loading platform located higher than the wheels rotate around the axles of the left and right wheels, and the driver carries the load while balancing the front and rear of the loading platform with the front handle provided in front of the loading platform. In a two-wheel cart,
In the lower space of the loading platform, a heavy battery, other driving motors and other members including the transmission thereof are arranged so as to be opposite to each other about the axle, and the position of the battery is Provided with a position adjustment mechanism to move to
An electric two-wheel cart characterized in that an operating portion is provided on a front handle, which is linked to the motor and the battery and operates to start, stop, and rotate the rotation of the wheels.   The electric two-wheel cart according to claim 1, wherein the center of gravity of the entire cart including the battery is adjusted by a position adjusting mechanism so that the center of gravity of the cart is close to a position directly above the axle and is biased to the front side.   The electric two-wheel cart according to claim 1 or 2, wherein a differential gear is provided on the axle.   4. The clutch according to any one of claims 1 to 3, wherein a clutch for switching between free rotation of a wheel and electric rotation by a motor is provided on the axle, and a switch for switching the clutch is provided on the front handle. The electric two-wheel cart described.   A loading platform frame for supporting the loading platform is attached to the lower portion of the loading platform, and both side handles having a length that can be inserted between both sides of the loading platform frame by the front are provided so that the front handles are attached to the front ends of the both-side handles. A wheel support frame provided with left and right bearings is fixed to the lower part of the left and right sides of the loading frame, and an axle provided with left and right wheels is supported on the bearing. To 4. The electric two-wheeled cart according to any one of items 4 to 4.   A stand with a lower end protruding downward so that it is below the line connecting the lower end of the wheel and the lower part of the front handle and above the parallel line with the load passing through the lower end of the wheel when the load is leveled. The electric two-wheel cart according to claim 5, wherein the electric two-wheel cart is provided on a carrier frame or a side handle.   A rear handle with a length that does not allow people to go backwards from the left and right sides on the rear side of the loading platform frame is bent obliquely upward, and the rear handle is installed at the tip of the rear handle The electric two-wheel cart according to claim 5 or 6, wherein   The position adjustment mechanism forms a long hole in the front and rear direction on the base plate fixed to the wheel support frame, and the battery is fixed with a fixing bracket having a bolt hole, and can be fastened to the long hole in a free position. The battery mounting position can be moved back and forth and fixed by loosening and tightening a nut screwed into the bolt through the bolt hole of the fixing bracket. The electric two-wheel cart according to any one of the above. The position adjustment mechanism is provided with a slider having a rail gripping part that moves back and forth while being guided by the rail on the base plate fixed to the axle support frame. A handle support plate having a bearing hole provided in the center direction of the female screw portion is provided on the base plate, and a male screw is provided at the tip of the bearing hole. The rotating handle having a portion is supported and the male screw portion is screwed to the female screw portion, so that the position of the battery can be adjusted back and forth by rotation of the rotating handle. The electric two-wheel cart according to any one of the above.

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