JP2008001274A - Walk-type transport cart - Google Patents

Abstract

An easy-to-use walking type transport cart that is highly adaptable to walking work and that can be pushed forward according to the movement of a worker's foot.
An in-wheel motor 17 having no speed reduction mechanism is integrally incorporated in a wheel portion of a wheel portion 9 constituting a driving wheel of a walk-type transport cart 100. The in-hole motor 17 that does not have a speed reduction mechanism can rotate the tire 20 incorporated in the rotor 19 of the in-wheel motor 17 on the higher rotation side by an external force, and thus pulsates the walking-type transport cart 100 in the power-on state. It is possible to push forward according to the changing foot of the worker.
[Selection] Figure 1

Description

  The present invention relates to a walking-type transport cart, and more particularly, to a walking-type transport cart provided with an electric motor that applies a driving force to a wheel portion.

  In general, hand-held walking carts are used for transporting materials and parts, transporting harvested items and fertilizer on farms, etc. It is hard work for workers. Then, in order to reduce a worker's labor load, the walk-type conveyance cart provided with the electric motor which provides a driving force to a wheel part is proposed (for example, patent documents 1, 2).

Japanese Utility Model Publication No. 7-40354 JP 2003-125505 A

  However, in the above conventional walking type carriage, although the speed is adjusted by increasing or decreasing the rotation speed of the electric motor by the speed adjustment dial provided on the steering handle, Walking because the speed of the changing worker's feet, that is, it does not adjust the running speed according to the feet of the worker who repeats periodically and intermittently a little faster or slower There was a problem that adaptability to work was low. For that reason, even if an operator wants to push the carriage according to the foot travel, it was actually difficult and unusable.

  Therefore, the present invention has been made to solve the above-described problems of the prior art, has high adaptability to walking work, and can be pushed forward according to the movement of the operator's foot. An object is to provide a walking cart that is easy to use.

In order to achieve the above object, a first invention is a walking type transport cart provided with an electric motor that applies a driving force to a wheel portion.
The electric motor is integrally incorporated in the wheel portion of the wheel portion, and the electric motor is an in-wheel motor having no speed reduction mechanism.

  According to the first invention, by integrating an in-wheel motor that does not have a speed reduction mechanism in the wheel portion of the wheel portion, the tire driven to rotate by the in-wheel motor can be further rotated on the high rotation side by external force. become able to. Thus, in the power-off state, the operator can not only lightly push the walking-type transport cart, but also in the power-on state, that is, the state where the walking-type transport cart is running at a constant speed, You can increase the speed by trying to push the aircraft further. In other words, since the tire rotating at a constant speed can be rotated on the higher rotation side by external force, the walking type carriage can be pushed forward according to the foot movement of the worker that changes pulsatically. Become. As a result, it is possible to provide an easy-to-use walk-type transport cart that is highly adaptable to walking work and can be pushed forward according to the foot travel of the worker.

  In order to achieve the above object, according to a second invention, in the first invention, the in-wheel motor is an outer rotor type in which a rotor is provided outside an inner stator.

  According to the second invention, since the outer rotor type is used for the in-wheel motor, even if the electric motor is incorporated in the wheel portion, there is no need to significantly change the structure of the wheel portion, which increases the cost and weight. Compared to the case of using an in-rotor type in-wheel motor in which a stator is provided on the outside of the rotor, the amount of lateral protrusion is greatly reduced, so that operability is improved. be able to.

In order to achieve the above object, a third invention provides a walking-type transport cart including an electric motor that applies a driving force to a wheel portion.
Provided between the electric motor and the wheel portion is a reverse rotation prevention device that transmits a rotational force only from the electric motor side to the wheel portion side and that is free from the wheel portion side to the electric motor side. It is characterized by.

  According to the third aspect of the present invention, the reverse rotation prevention device is provided between the electric motor and the wheel portion so as to transmit the rotational force only from the electric motor side to the wheel portion side and to be free from the wheel portion side to the electric motor side. As a result, the tire driven to rotate by the electric motor can be further rotated on the high rotation side by an external force. Thus, in the power-off state, the operator can not only lightly push the walking-type transport cart, but also in the power-on state, that is, the state where the walking-type transport cart is running at a constant speed, If the airframe is further pushed forward, the speed can be increased, so that the walking type carriage can be pushed forward according to the movement of the operator's foot that changes in a pulsating manner. As a result, it is possible to provide an easy-to-use walk-type transport cart that is highly adaptable to walking work and can be pushed forward according to the foot travel of the worker.

  According to the walking-type transport cart of the present invention, an operator who changes the power-on walking-type transport cart in a pulsating manner by integrally incorporating an in-wheel motor that does not have a speed reduction mechanism in the wheel section of the wheel section. It becomes possible to push forward according to the travel of the foot. It is also possible to add a one-way clutch as a reverse rotation prevention device to a traveling mechanism using a normal electric motor different from the in-wheel motor.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a side view of a three-wheeled walking-type transport cart to which the present invention is applied, FIG. 2 is a perspective view of the frame, and FIG. 3 is a perspective view of the wheel portion.

First, a three-wheeled walking-type transport cart 100 to which the present invention is applied will be described.
As shown in FIGS. 1 to 3, reference numeral 1 denotes a rectangular frame-shaped frame that forms a loading platform, and a stepped portion for dropping and stabilizing the bottom of the agricultural material container 2 inside the frame 1. 3 is integrally formed. Further, as shown in FIG. 2, a rectangular opening 4 is formed at the center of the frame 1 so that the battery 5 is mounted from the opening 4 toward the lower side of the frame 1. It has become. A controller 6 for controlling an electric motor, which will be described later, is suspended from the front side of the battery 5 via a pair of left and right L-shaped mounting stays 7, 7. A guide member 8 covered with an elastic member is arranged in a U-shape to protect the controller 6 from obstacles.

  On the lower side of the frame 1, a support member 11 that supports the frame 1 and pivots three wheel portions 9, 10A, 10B described later is disposed. A lower end portion of a T-shaped handle 12 extending in the vertical direction of the machine body is bolted to the rear portion of the support member 11. Grips 13 and 13 are attached to the front end of the handle 12 for the operator to hold. Near one grip 13, a switch 14 for turning on and off the electric motor, a speed adjusting volume 15 for adjusting the running speed by adjusting the rotating speed of the electric motor, the rotating direction of the electric motor, that is, forward, reverse A changeover switch 16 and the like for switching between are provided. The output signals of these switches 14 to 16 are input to the controller 6 for use in driving control of the electric motor.

The three wheel portions 9, 10A, 10B have one wheel on the front side and two wheels parallel to the rear side on the lower side of the frame 1, and the rotation center axis of the front wheel portion (front wheel) 9 is The rotation center shafts of the rear wheel portions (rear wheels) 10 </ b> A and 10 </ b> B are located substantially below the battery 5.
Further, these three wheel parts 9, 10A, 10B are mainly loaded on the rear wheel side (wheel parts 10A, 10B) when empty, and the front wheel (wheel part 9) and the rear wheel are loaded with luggage. The front wheel portion 9 is configured to be rotationally driven by an electric motor.
The front wheel portion 9 and the rear wheel portions 10A and 10B have different diameters, and the front wheel portion 9 has a smaller diameter than the rear wheel portions 10A and 10B. Thus, since the front wheel portion 9 is low geared, the driving force can be more exhibited as compared with the case where all the three wheels have substantially the same diameter. In addition, by using a small-diameter wheel, the degree of freedom of the mounting position can be increased, and adjustment can be made so that the ground load can be obtained most effectively during loading.

As shown in FIG. 3, the wheel portion of the front wheel portion 9 also serves as an in-wheel motor 17 as an electric motor, and this in-wheel motor 17 is outside the stator (hub shaft) 18 inside the motor. An outer rotor type in which a cylindrical rotor (rotary shaft, hereinafter referred to as a rotor) 19 is rotatably provided. A tire 20 is fitted on the outer periphery of the rotor 19, and the in-wheel motor 17 is decelerated. The tire 20 is driven to rotate without using a mechanism. For this reason, even in a power-on state, that is, a state where the walking type transport cart is traveling at a constant speed, the tire 20, that is, the front wheel portion 9 can be pushed forward by an external force. The in-wheel motor 17 is not limited to the outer rotor type, but may be an in-rotor type in which a stator is provided on the outer peripheral side of the rotor inside the motor.
Further, both end portions of the hub shaft 18 that is the rotation center shaft of the in-wheel motor 17 are supported and fixed to lower end portions of a pair of left and right fork members 21 and 21 that are suspended from the support member 11.

  In the above-described configuration, the front wheel unit 9 is rotationally driven by the in-wheel motor 17. However, the present invention is not limited to this and is a normal electric motor different from the in-wheel motor 17. The front wheel portion 9 can be rotationally driven by a chain drive system using the. In such a case, for example, like the one-way clutch attached to the rear wheel hub of the bicycle, the rotational force is transmitted only from the electric motor side to the front wheel portion side, and from the front wheel portion side. A one-way clutch pawl is provided between the driven sprocket meshed with the chain and the front wheel portion 9 as a reverse rotation prevention device that is free on the electric motor side, and a gear meshed with the pawl is provided on the front wheel portion 9. Provided on the hub shaft. As a result, in the power-on state, that is, in the state where the walking-type transport cart is running at a constant speed, the speed can be increased if the operator tries to push the aircraft further.

  As described above, according to the present invention, by incorporating the in-wheel motor 17 having no speed reduction mechanism into the wheel portion of the front wheel portion 9, the tire 20 that is rotationally driven by the in-wheel motor 17 is further increased by an external force. It can be turned on the rotation side. Thereby, in the power-off state, the operator can not only push the walking-type transport cart 100 lightly, but also in the power-on state, that is, even when the walking-type transport cart 100 is running at a constant speed, If one tries to push the aircraft further, the speed can be increased. That is, since the tire 20 rotating at a constant speed can be rotated on the higher rotation side by an external force, the walking-type transport cart 100 can be pushed forward according to the foot movement of the worker that changes pulsatically. It becomes like this. As a result, it is possible to provide an easy-to-use walk-type transport cart that is highly adaptable to walking work and can be pushed forward according to the foot travel of the worker.

  Moreover, since the outer rotor type is used for the in-wheel motor 17, even if the in-wheel motor 17 is incorporated in the wheel portion, it is not necessary to change the structure of the wheel portion 9 significantly, and the increase in cost and weight are suppressed. Compared to the case of using an in-rotor type in-wheel motor in which a stator is provided on the outside of the rotor, the amount of lateral protrusion is greatly reduced, so that operability can be improved. it can.

  Further, according to the present invention, between the normal electric motor different from the in-wheel motor 17 and the front wheel unit 9, the rotational force is transmitted only from the electric motor side to the front wheel unit side, and the front wheel unit is transmitted. By providing a free one-way clutch from the side to the electric motor side, the front wheel portion 9 on which the electric motor is rotationally driven can be rotated on the higher rotation side by external force. Thus, in the power-off state, the operator can not only lightly push the walking-type transport cart, but also in the power-on state, that is, the state where the walking-type transport cart is running at a constant speed, If the airframe is further pushed forward, the speed can be increased, so that the walking type carriage can be pushed forward according to the movement of the operator's foot that changes in a pulsating manner.

  Further, according to the wheel layout described above, when the vehicle is idle, the handle 12 can be pushed down and the walking-type transport cart 100 can be pushed forward while the front wheel portion 9 is lifted from the ground. Usability can be further improved. Furthermore, when loading a load, the driving force is secured by increasing the contact surface pressure by causing a vertical load on the front wheel portion 9 to improve the running stability when loading the load. be able to.

  Note that the three-wheeled walk-type transport cart 100 of the present invention is not limited to the one that carries the agricultural material container 2, and the three-wheeled walk-type transport cart that does not use the agricultural material container 2. It can also be applied to. In addition, the present invention is not limited to a front and rear two-wheel walking carriage, but a front two-wheel and rear two-wheel four-wheel walking carriage, or a two-wheel or one-wheel walking carriage. It can also be applied to a transport cart.

Next, a two-wheeled walking type control machine to which the present invention is applied will be described with reference to FIG.
FIG. 4 is a side view of a two-wheeled walking type control machine to which the present invention is applied.

As shown in FIG. 4, reference numeral 22 denotes a narrow frame extending in the longitudinal direction of the vehicle body, and has wheel portions 23 and 24 pivoted at both front and rear ends. An outer rotor type in-wheel motor 25 as an electric motor is incorporated in the wheel portion of the wheel portion 23 on one end side of the frame 22. A hub shaft (not shown) located at the center of rotation of the in-wheel motor 25 is supported and fixed at both ends by the frame 22, and is a cylindrical shape rotatably provided outside the hub shaft. A tire 27 is fitted into the rotor 26, and the tire 27 is directly driven to rotate without using a speed reduction mechanism. For this reason, the tire 27 can be pushed forward by an external force even in a power-on state, that is, a state in which the walking type control machine 101 is running at a constant speed.
On the other hand, the wheel portion 24 at the other end of the frame 22 is a driven wheel (auxiliary wheel) that does not have an electric motor and has a larger diameter than the wheel portion 23.
The in-wheel motor 25 is not limited to the outer rotor type, but can be an in-rotor type. Moreover, you may comprise so that the wheel part 23 may be rotationally driven by the chain drive system using the normal electric motor different from the in-wheel motor 25. FIG. In such a case, a one-way clutch as a reverse rotation prevention device that transmits rotational force only from the electric motor side to the wheel portion side between the electric motor and the wheel portion 23 and is free from the wheel portion side to the electric motor side. And a gear meshing with the pawl is provided on the wheel portion 23.

  A spray nozzle mounting member 28 is attached to the center portion of the frame 22 in an inclined state toward the wheel portion 23 side, and the upper portion of the frame 22 projects in a V shape in the left-right direction of the machine body. A spray nozzle 29 is integrally attached. A hose 30 for supplying a chemical solution from a power sprayer (not shown) is connected to the spray nozzle 29.

  A battery 31 and a controller 32 for the in-wheel motor 25 are attached and fixed to the lower wheel portion 23 side of the spray nozzle attaching member 28, and a T extending in the vertical direction of the machine body is attached to the wheel portion 24 side. The lower end portion of the letter-shaped handle 33 is attached and fixed in a state of being inclined in a direction away from the spray nozzle 29.

A grip 34 (only one of them is shown) is attached to the upper portion of the handle 33 for the operator to hold. In the vicinity of one grip 34, a switch (not shown) for turning on and off the in-wheel motor 25, a speed adjustment volume 35 for adjusting the rotation speed of the in-wheel motor 25, and a switch for switching the rotation direction of the in-wheel motor 25. A switch (not shown) and the like are provided.
In addition, a handle angle adjuster 36 that can be expanded and contracted to adjust the tilt angle of the handle 33 and can be fixed at a desired position is interposed between the frame 22 and the handle 33.

  According to such a configuration, by incorporating the outer rotor type in-wheel motor 25 having no speed reduction mechanism in the wheel portion of the wheel portion 23, the operator can lightly push the walking type control machine 101 in the power-off state. Not only can the power be turned on, that is, even when the walking type control machine 101 is running at a constant speed, the speed can be increased if the operator tries to push the machine further. As a result, it becomes possible to push the walking-type control machine 101 in the power-on state according to the movement of the operator's foot that changes in a pulsating manner. It is also possible to add a one-way clutch to a traveling mechanism using a normal electric motor different from the in-wheel motor 25.

  Further, when the hose 30 for supplying the chemical solution from the power sprayer arranged outside the field is connected to the spray nozzle 29, the wheel portion 23 is caused by the weight of the spray nozzle itself and the running resistance when the hose 30 is dragged. A driving force can be effectively obtained by being pressed against the ground. For this reason, it is possible to improve the running stability during the spraying operation.

Next, a one-wheel walking fertilizer spreader to which the present invention is applied will be described with reference to FIG.
FIG. 5 is a side view of a one-wheel walking fertilizer spreader to which the present invention is applied.

As shown in FIG. 5, reference numeral 37 denotes a frame that pivots the wheel portion 38 at one end portion, and a funnel-type fertilizer tank 39 is integrally attached to the center portion of the frame 37. A bifurcated handle 40 is integrally formed at the other end of the frame 37. An outer rotor type in-wheel motor 41 as an electric motor is incorporated in the wheel portion of the wheel portion 38. A tire 44 is fitted into a rotor 43 provided outside the hub shaft 42 of the in-wheel motor 41, and the in-wheel motor 41 directly rotates the tire 44 without using a reduction mechanism. ing. The in-wheel motor 41 may be an in-rotor type. Further, the wheel portion 38 may be rotationally driven by a chain drive system using a normal electric motor different from the in-wheel motor 41. In such a case, the one-way clutch pawl is used as a reverse rotation prevention device that transmits the rotational force between the electric motor and the wheel portion 38 only from the electric motor side to the wheel portion side and is free from the wheel portion side to the electric motor side. And a gear meshing with the pawl is provided.
A battery 45 is disposed above the in-wheel motor 41 in a state of protruding from the frame 37, and a controller 46 is attached to the frame 37 in the vicinity of the trunk portion of the fertilizer tank 39.

  The handle 40 is attached with a grip 47 (only one side is shown) for the operator to hold. In the vicinity of the grip 47, a switch (not shown) for turning on and off the in-wheel motor 47, a speed adjustment volume 48 for adjusting the rotation speed of the in-wheel motor 47, and a changeover switch for switching the rotation direction of the in-wheel motor 47 ( An opening / closing lever 50 for opening and closing a fertilizer spraying shutter 49 provided at the lower portion of the fertilizer tank 39 is provided. An auxiliary wheel 51 having a smaller diameter than the wheel portion 38 is mounted on the frame 37 via an attachment stay 52.

  According to such a configuration, by incorporating the outer rotor type in-wheel motor 47 having no speed reduction mechanism in the wheel portion of the wheel portion 38, the operator can lightly push the walking-type fertilizer spreader 102 in the power-off state. Not only can the power be turned on, that is, even when the walking-type fertilizer spreader 102 is running at a constant speed, the speed can be increased if the operator tries to push the machine further. As a result, it is possible to push the walking-type fertilizer spreader 102 in the power-on state in accordance with the movement of the operator's foot that changes in a pulsatile manner. It is also possible to add a one-way clutch to a traveling mechanism using a normal electric motor different from the in-wheel motor 47.

  Further, since the battery 45 is disposed above the wheel portion 38 incorporating the in-wheel motor 47, the wheel portion 38, that is, the driving wheel is pressed against the ground by the load of the battery 45 so that a driving force can be obtained effectively. It has become. For this reason, it is possible to improve the running stability when running with fertilizers loaded or when fertilizer is spread.

It is a side view of a three-wheeled walk-type transport cart to which the present invention is applied. It is a perspective view of the frame. It is a perspective view of the wheel part. It is a side view of a two-wheeled walking type control machine to which the present invention is applied. It is a side view of the 1-wheel type walk type manure spreader to which the present invention was applied.

Explanation of symbols

9 Wheel part 17 In-wheel motor (electric motor)
18 Hub axle (stator)
19 Rotor
20 Tire 23 Wheel part 25 In-wheel motor 26 Rotor 38 Wheel part 41 In-wheel motor 42 Hub shaft 43 Rotor 100 Three-wheeled walk-type transport cart 101 Two-wheeled walk-type control machine 102 One-wheeled walk-type fertilizer spray Machine

Claims (3)

In the walk-type transport cart provided with an electric motor that applies driving force to the wheel portion,
The walking type transport cart, wherein the electric motor is integrally incorporated in a wheel portion of the wheel portion, and the electric motor is an in-wheel motor having no speed reduction mechanism.   The walk-type transport cart according to claim 1, wherein the in-wheel motor is an outer rotor type in which a rotor is provided outside an inner stator. In the walk-type transport cart provided with an electric motor that applies driving force to the wheel portion,
Provided between the electric motor and the wheel portion is a reverse rotation prevention device that transmits a rotational force only from the electric motor side to the wheel portion side and that is free from the wheel portion side to the electric motor side. A walking-type transport cart characterized by

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