JP2020015499A - Driving system development support device - Google Patents

Abstract

To secure a relatively wide space between left and right wheels in a driving system in which a driving part and a transmission mechanism are disposed between the left and right wheels.SOLUTION: A driving system includes: a frame extending in a predetermined direction; a pair of left and right wheels which are rotatably attached to both end parts of the frame as seen in an extension direction through axles; and a driving part 30 for rotationally driving the axles. The driving part 30 has: a base plate 31 fixed to an area of the frame which is near a wheel side end part; a bearing part 32 which is fixed to an area of the base plate 31 which is near a wheel side end part; a driving motor 33; and an output shaft 34 rotatably supported by the bearing part 32. Rotational driving force of the driving motor 33 is transmitted to the output shaft 34 through a first transmission mechanism, and rotational driving force of the output shaft 34 is transmitted to the axle through a second transmission mechanism. The bearing part 32 supports the output shaft 34 in a cantilever manner.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a drive system, a rickshaw, and a drive system development support device.

At present, various electric assist rickshaws configured to rotate wheels by driving force of an electric motor operated by electric power supplied from a power supply have been proposed (for example, see Patent Documents 1 to 3). It is said that the adoption of such an electric assist rickshaw can reduce the labor of the vehicle owner, for example, on an ascending slope having a large slope.

JP 2002-200979 A JP-A-2004-97070 JP-A-2004-025975

By the way, in the conventional electric assist rickshaw described in Patent Documents 1 to 3, both a driving unit including an electric motor and a transmission mechanism for transmitting the driving force generated by the driving unit to the wheels. It is necessary to provide. Such a driving unit and a transmission mechanism are generally disposed between the left and right wheels near the front of the rickshaw.

However, in the conventional electric assist type rickshaw, the aesthetic appearance may be impaired by the presence of such a drive unit. In addition, since the space between the left and right wheels of the rickshaw is narrowed by the presence of the driving unit and the like, there is a problem that it is difficult for a user (car) to enter the space.

The present invention has been made in view of such circumstances, and in a drive system in which a drive unit and a transmission mechanism are arranged between left and right wheels, a relatively wide space is secured between the left and right wheels. Aim.

In order to achieve the above object, a drive system according to the present invention includes a frame extending in a predetermined direction, a pair of left and right wheels rotatably attached to both ends of the frame in an extending direction via an axle, and an axle. A drive unit for rotationally driving, wherein the drive unit includes a base plate fixed near an end of at least one wheel of the frame, and an end of at least one wheel of the base plate. A bearing portion fixed to the vicinity, a drive motor, and an output shaft rotatably supported by the bearing portion, wherein the output shaft transmits a rotational driving force of the drive motor to the output shaft. The axle is connected to the drive shaft via a transmission mechanism, the axle is connected to the output shaft via a second transmission mechanism for transmitting the rotational driving force of the output shaft to the axle, and the bearing supports the output shaft in a cantilever manner. Like to Those which are. Further, the rickshaw according to the present invention,
It is provided with such a drive system.

When such a configuration is adopted, the bearing of the drive unit for rotating and driving the axle is fixed near the wheel-side end of the base plate fixed near at least one wheel-side end of the frame. The bearing portion can support the output shaft connected to the axle in a cantilever manner.
As described above, since the bearing of the drive unit is arranged near the wheel (near the end in the extending direction of the frame), the drive unit can be arranged as a whole near the wheel, and the extension of the frame can be achieved. A relatively large space can be secured at the center in the direction. Therefore, for example, when the present drive system is employed as a drive system for a rickshaw, it is possible to prevent the presence of the drive unit from impairing the aesthetics of the rickshaw, and the user (carman) can easily enter the space. .

The drive system according to the present invention employs a first transmission mechanism having a drive switching lever,
By operating the drive switching lever in the first direction, the rotational driving force of the driving motor is transmitted to the output shaft, and by operating the drive switching lever in the second direction, the rotational driving force of the drive motor is output. It can be configured to release transmission to the shaft.

By adopting such a configuration, by operating the drive switching lever of the first transmission mechanism, it is possible to transmit the rotational driving force from the driving motor to the output shaft or cancel the transmission of the rotational driving force. .

In the drive system according to the present invention, the first transmission mechanism transmits the rotational driving force of the drive motor to the output shaft by receiving the first signal, and receives the second signal to drive the drive motor. And an electric clutch configured to release the transmission of the rotational driving force to the output shaft.

With such a configuration, the electric clutch that operates upon receiving a specific signal can transmit the rotational driving force from the driving motor to the output shaft or cancel the transmission of the rotational driving force.

Further, the first drive system development support device according to the present invention is configured such that a drive motor that generates a rotational drive force according to a flowing current, and the rotational drive force of the drive motor is transmitted through a first transmission mechanism. An output shaft, an axle to which the rotational driving force of the output shaft is transmitted via a second transmission mechanism, a bearing portion rotatably supporting the axle, a wheel fixed to the axle and rotating with the axle, and holding the wheel. And a clamping force setting unit for setting a clamping force by the wheel clamping unit.

By employing such a configuration, it is possible to find out how much current is required to rotationally drive the wheels by the drive motor in a state where the wheels are held with the predetermined holding force set by the holding force setting unit. Therefore, in order to enable the driving motor to generate a desired rotational driving force even when the wheels are held with a predetermined holding force, the current flowing to the driving motor is changed or a new driving motor is developed. Or you can.

In addition, the second drive system development support device according to the present invention is configured such that a drive motor that generates a rotational drive force according to a flowing current, and the rotational drive force of the drive motor is transmitted via the first transmission mechanism. An output shaft, an axle to which rotation driving force of the output shaft is transmitted via a second transmission mechanism, a bearing portion rotatably supporting the axle, a resistance motor for applying a resistance to the axle, and a resistance. A resistance setting unit for setting a force.

With this configuration, it is necessary to determine how much current is required to rotationally drive the axle by the drive motor in a state in which the predetermined resistance set by the resistance setting unit and applied by the resistance motor is applied to the axle. You can explore. Therefore, in order to enable the driving motor to generate a desired rotational driving force even when a predetermined resistance is applied to the axle, the current flowing to the driving motor is changed or a new driving motor is developed. Or you can.

ADVANTAGE OF THE INVENTION According to this invention, in a drive system in which a drive part and a transmission mechanism are arrange | positioned between right and left wheels, it becomes possible to secure a comparatively large space between right and left wheels.

1 is a perspective view of a drive system according to an embodiment of the present invention. FIG. 2 is a top view of the drive system shown in FIG. 1. FIG. 2 is a perspective view of a peripheral portion of a drive unit of the drive system shown in FIG. 1 when viewed from a drive motor side. FIG. 4 is a perspective view of a case where a peripheral portion of a driving unit shown in FIG. 3 is viewed from a base plate side. FIG. 4 is a top view of a part around a driving unit shown in FIG. 3. FIG. 6 is a side view of a peripheral portion of the driving unit illustrated in FIG. 3 (a diagram when the peripheral portion of the driving unit illustrated in FIG. 5 is viewed from a VI direction). FIG. 7 is a side view of a peripheral portion of the driving unit shown in FIG. 3 (a diagram when the peripheral portion of the driving unit shown in FIG. 5 is viewed from the VII direction). FIG. 8 is a front view of a peripheral portion of the driving unit illustrated in FIG. 3 (a diagram when the peripheral portion of the driving unit illustrated in FIG. 5 is viewed from the VIII direction). FIG. 6 is a rear view of a peripheral portion of the driving unit illustrated in FIG. 3 (a diagram when the peripheral portion of the driving unit illustrated in FIG. 5 is viewed from the IX direction). 1 is a perspective view of a drive system development support device according to an embodiment of the present invention. It is a perspective view of the drive system development assistance apparatus shown in FIG. FIG. 11 is a top view of the drive system development support device shown in FIG. 10. FIG. 11 is a front view of the drive system development support device shown in FIG. 10 (a diagram when the drive system development support device shown in FIG. 12 is viewed from the XIII direction). FIG. 12 is a side view of the drive system development support device shown in FIG. 10 (a diagram when the drive system development support device shown in FIG. 12 is viewed from the XIV direction). FIG. 11 is a front view of the drive system development support device shown in FIG. 10 (a diagram when the drive system development support device shown in FIG. 12 is viewed from the XV direction).

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the following embodiments are merely preferable application examples, and the application scope of the present invention is not limited thereto.

<Drive system>
First, a drive system 1 according to an embodiment of the present invention will be described with reference to FIGS. The drive system 1 according to the present embodiment is applied to a power-assisted rickshaw, and includes a frame 10, a pair of left and right wheels 20, a drive unit 30,
It has.

The frame 10 extends in a predetermined direction, and is disposed between a pair of left and right wheels 20.
And a member that functions to support the drive unit 30 and is made of a material having a predetermined rigidity such as a metal. The shape of the frame 10 is not particularly limited. For example, a solid columnar member or a hollow cylindrical member can be employed as the frame 10. The shape of the frame 10 does not necessarily have to be a columnar (cylindrical) shape, and may have local irregularities to facilitate the mounting of the drive unit 30.

The wheel 20 has spokes 22 extending radially from the axle 21, an annular rim 23 disposed around the spoke 22, and a tire 24 mounted on the rim 23, and And is rotatably attached to both ends of the frame 10 in the extending direction. In the present embodiment, a relatively large wheel 20 (for example, having a diameter of 42 inches) for a rickshaw is employed, but the size of the wheel 20 is not particularly limited.

The drive unit 30 is for rotating and driving the axle 21 of the wheel 20, and as shown in FIGS. 3 to 9, a base plate 31, a bearing unit 32, a drive motor 33, an output shaft 34,
have. In the present embodiment, as shown in FIGS. 1 and 2, two driving units 30 are employed to drive the left and right wheels 20, however, one of the left and right wheels 20 is driven. Only one drive unit 30 may be employed.

As shown in FIGS. 1 and 2, the base plate 31 is a member fixed to the vicinity of the end 11 on the wheel 20 side of the frame 10 and functions to support the bearing 32 and the driving motor 33. For example, it is made of a material having a predetermined rigidity such as a metal. As shown in FIG. 5 and the like, the base plate 31 in the present embodiment has a flat plate portion 31a for fixing the bearing portion 32 and the like.
And a connecting portion 31b for connecting the flat plate portion 31a and the frame 10. The structure of the base plate 31 is not limited to this, but may be any structure that supports the bearing portion 32 and the like and is fixed to the frame 10.

The bearing portion 32 is fixed near the end portion 31c of the base plate 31 on the wheel 20 side,
It is a member that functions to rotatably support the output shaft 34, and is made of a material having a predetermined rigidity such as a metal. The bearing portion 32 in the present embodiment is configured such that the output shaft 34 is
We support in. That is, the output shaft 34 is not supported by two bearing portions (so-called two shafts), but the output shaft 34 is supported by one bearing portion 32 (so-called single shaft). This allows
The drive unit 30 can be arranged near the wheels 20, and a relatively large space can be formed in the center of the frame 10 in the extending direction.

The drive motor 33 operates by electric power supplied from a power supply (battery) not shown to generate a required rotational driving force. The rotational driving force generated by the driving motor 33 is transmitted to the output shaft 34 via the first transmission mechanism. Further, the rotational driving force of the output shaft 34 is transmitted to the axle 21 via the second transmission mechanism. The output shaft 34 is a member for outputting the rotational driving force of the driving motor 33 to the axle 21, and is rotatably supported by the bearing 32.

The first transmission mechanism in the present embodiment has a manual clutch mechanism. That is, the first transmission mechanism has the drive switching lever 35, and the drive switching lever 35 is moved in the first direction (FIG. 5).
Is operated in the direction of arrow A in FIG. 5, the rotational driving force of the drive motor 33 is transmitted to the output shaft 34, while the drive switching lever 35 is operated in the second direction (direction of arrow B in FIG. 5). Thus, the transmission of the rotational driving force of the driving motor 33 to the output shaft 34 is released. The second transmission mechanism in the present embodiment includes a sprocket 36 attached to the tip of the output shaft 34, a chain (not shown) for transmitting the rotational driving force of the sprocket 36 to the axle 21, and the like.

In the drive system 1 according to the embodiment described above, the bearing portion 32 of the drive portion 30 for rotating and driving the axle 21 includes the base plate 31 fixed to the vicinity of the end 11 on the wheel 20 side of the frame 10. It is fixed near the end portion 31c on the wheel 20 side, and this bearing portion 32
The output shaft 34 connected to the axle 21 can be supported in a cantilever manner. Thus, wheel 2
Since the bearings 32 of the driving unit 30 are arranged near zero (near the ends in the extending direction of the frame 10), the driving unit 30 can be arranged as a whole near the wheels 20, and A relatively large space can be secured at the center in the extending direction. Therefore, it is possible to prevent the aesthetic appearance of the rickshaw from being impaired by the presence of the driving unit 30, and it is possible for the user (car) to easily enter the space.

Further, in the drive system 1 according to the embodiment described above, by operating the drive switching lever 35 of the first transmission mechanism, the rotational drive force is transmitted from the drive motor 33 to the output shaft 34, The transmission of the driving force can be canceled.

In the above embodiment, the example in which the manual clutch mechanism is employed has been described, but an electric clutch mechanism may be employed instead of the manual clutch mechanism. That is, while receiving the first signal, the rotational driving force of the driving motor 33 is transmitted to the output shaft 34, while receiving the second signal, the rotational driving force of the driving motor 33 is transmitted to the output shaft 34. May be provided in the first transmission mechanism. When such a configuration is adopted, the electric clutch that operates upon receiving a specific signal causes the output shaft 3 to move from the driving motor 33 to the output shaft 3.
4, the transmission of the rotational driving force or the transmission of the rotational driving force can be canceled.

Also, instead of providing a manual clutch mechanism or an electric clutch mechanism, the drive motor 33 and the output shaft 34 are directly connected, and on / off control of the rotational drive force generated by the drive motor 33 is performed. It is also possible to switch on / off the rotational driving force on the (and thus the axle 21).

<Drive system development support device>
Next, the drive system development support device 2 according to the embodiment of the present invention will be described with reference to FIGS. The drive system development support device 2 according to the present embodiment is for developing a drive motor for generating a desired rotational drive force on a desktop, and includes a drive motor (not shown), an output shaft 3, and an axle. 4, an axle bearing 5, a wheel 6, a wheel holding section 7, and a holding force setting section 8.

Further, the drive system development support device 2 according to the present embodiment includes a plate-like portion 9 to which a drive motor and the like are attached, as shown in FIGS. The plate-like portion 9 has a size and a plane shape that can be placed on a table (for example, a rectangular shape having a long side of 20 to 140 cm and a short side of 15 to 70 cm).
have. For this reason, the drive system development support device 2 can mount the entire configuration on a desk. In addition, the planar shape of the plate-shaped portion 9 is not limited to a rectangular shape, and may be, for example, an elliptical shape or a polygonal shape.

The driving motor is configured to operate by electric power supplied from a power supply (battery) (not shown) to generate a rotational driving force according to a flowing current. The drive motor in the present embodiment is fixed to a motor fixing portion 9a provided on the upper surface of the plate-like portion 9, as shown in FIG.

As shown in FIG. 12 and the like, the output shaft 3 is rotatably mounted on a mount 9b provided on the upper surface of the plate-shaped portion 9 via an output shaft bearing 3a. The rotational driving force of the driving motor is transmitted to the output shaft 3 via the first transmission mechanism.

The axle 4 is rotatably mounted on a gantry 9 b provided on the upper surface of the plate portion 9 via an axle bearing 5. The rotational driving force of the output shaft 3 is transmitted to the axle 4 via the second transmission mechanism.

The first transmission mechanism and the second transmission mechanism can be configured by sprockets, chains, clutches, and the like. The gear ratio of the sprocket can be changed as appropriate.

The wheel 6 is fixed to the axle 4 and rotates together with the axle 4, and is made of a material having a predetermined rigidity such as a metal so as to withstand the holding force of the wheel holding portion 7. The diameter and thickness of the wheels 6 are set to dimensions that allow them to be arranged on a table.

The wheel holding unit 7 is configured to hold the wheel 6, and the holding force is set by the holding force setting unit 8. In the present embodiment, a load adjusting screw is employed as the holding force setting unit 8.

In the drive system development support device 2 according to the above-described embodiment, when the wheel 6 is rotationally driven by the driving motor in a state where the wheel 6 is clamped with the predetermined clamping force set by the clamping force setting unit 8, You can find out how much current you need. Therefore, the current flowing through the driving motor is changed or a new driving motor is developed so that the driving motor can generate a desired rotational driving force even when the wheel 6 is held with a predetermined holding force. Or you can. For example, assuming that a rickshaw for electric assist having a weight of 350 kg is moved on an uphill having a gradient of 8% at a speed of 4 km / h, the driving maximum value of the driving motor is set to “130 Nm”.
(2/3 assist of 180 Nm), and it is possible to use the device 2 to find out how much the current value is necessary (and whether or not it actually moves) for the 24 V drive motor actually used. .

In the above-described embodiment, the drive system development support device 2 including the wheel 6, the wheel holding portion 7, and the holding force setting portion 8 has been described. , And a resistance setting unit that sets the resistance.

When such a configuration is adopted, the axle 5 is driven to rotate by the drive motor in a state where the predetermined resistance set by the resistance setting unit and applied by the resistance motor is applied to the axle 5 without using the wheels 6 and the like. To find out how much current is needed. Therefore,
In order to allow the driving motor to generate a desired rotational driving force even when a predetermined resistance force is applied to the axle 5, the current flowing through the driving motor is changed or a new driving motor is developed. can do.

The present invention is not limited to the embodiments described above, and those in which a person skilled in the art appropriately changes the design of the embodiments are also included in the scope of the present invention as long as they have the features of the present invention. .
That is, each element included in the embodiment and its arrangement, material, condition, shape, size, etc.
The present invention is not limited to the illustrated example, and can be appropriately changed. In addition, each element included in the embodiment can be combined as far as technically possible, and a combination of these elements is also included in the scope of the present invention as long as it includes the features of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Drive system 2 ... Drive system development support apparatus 3 ... Output shaft 4 ... Axle 5 ... Axle bearing part 6 ... Wheel 7 ... Wheel holding part 8 ... Holding force setting part 10 ... Frame 11 ... Wheel side (of the frame) End 20: Wheel 21: Axle 30: Drive unit 31: Base plate 31c: Wheel-side end (of base plate) 32: Bearing unit 33: Drive motor 34: Output shaft 35: Drive switching lever (first transmission mechanism)
36 ... Sprocket (second transmission mechanism)

Claims (6)

A drive system comprising: a frame extending in a predetermined direction; a pair of left and right wheels rotatably attached to both ends of the frame in the extending direction via an axle; and a drive unit for rotating the axle. And
The drive unit includes a base plate fixed near at least one wheel side end of the frame, a bearing unit fixed near at least one wheel side end of the base plate, and a drive motor. And an output shaft rotatably supported by the bearing portion,
The output shaft is connected to the drive motor via a first transmission mechanism that transmits a rotational driving force of the drive motor to the output shaft,
The axle is connected to the output shaft via a second transmission mechanism that transmits a rotational driving force of the output shaft to the axle,
The drive system, wherein the bearing unit is configured to support the output shaft in a cantilever manner. The first transmission mechanism has a drive switching lever, and when the drive switching lever is operated in a first direction, the rotational driving force of the drive motor is transmitted to the output shaft while the drive switching lever is operated. The drive system according to claim 1, wherein the transmission of the rotational driving force of the driving motor to the output shaft is released by operating the lever in the second direction. The first transmission mechanism transmits a rotational driving force of the driving motor to the output shaft by receiving a first signal, and transmits a rotational driving force of the driving motor by receiving a second signal. The drive system according to claim 1, further comprising: an electric clutch configured to release the transmission to the output shaft.   A rickshaw comprising the drive system according to any one of claims 1 to 3. A driving motor for generating a rotational driving force according to the flowing current,
An output shaft to which the rotational driving force of the driving motor is transmitted via a first transmission mechanism,
An axle to which the rotational driving force of the output shaft is transmitted via a second transmission mechanism;
A bearing portion rotatably supporting the axle;
Wheels fixed to the axle and rotating with the axle;
A wheel holding portion for holding the wheel,
A clamping force setting unit that sets a clamping force by the wheel clamping unit,
A drive train development support device comprising: A driving motor for generating a rotational driving force according to the flowing current,
An output shaft to which the rotational driving force of the driving motor is transmitted via a first transmission mechanism,
An axle to which the rotational driving force of the output shaft is transmitted via a second transmission mechanism;
A bearing portion rotatably supporting the axle;
A resistance motor that applies resistance to the axle;
A resistance setting unit that sets the resistance,
A drive train development support device comprising:

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