KR20130073317A - Dual motor type electric multi-purpose utility vehicle - Google Patents

Abstract

PURPOSE: A dual motor type electrically driven utility vehicle is provided to have two motors, thereby being driven when one of the two motors does not work properly. CONSTITUTION: An electrically driven utility vehicle includes a driving unit (7), a power supply unit, a control unit, and a power transmission. The power transmission comprises a front differential device (9a) and a rear differential device (9b). The driving unit is disposed at the center of a vehicle body The driving unit includes two motors that are in parallel disposed spaced apart from each other; a transmission, and a synthesizing output device which is disposed between the driving motors and the transmission (72). The synthesizing output device synthesizes output power from the driving motors to deliver the output power to the transmission.

Description

Dual motor type electric multi-purpose utility vehicle

The present invention relates to a multi-purpose transport vehicle widely used for various purposes in various fields, such as driving on a rough road, transporting cargo and crops, driving a work machine, and in particular, a dual motor type electric drive type driven by two motors powered by electricity. A multipurpose transport vehicle.

Utility vehicle (UTV) is widely used in a wide range of fields such as distribution, construction, leisure, and farming. Especially, this multipurpose transportation vehicle is advantageous for traveling on rough roads, so it is mainly used as a transportation means for carrying and transporting soil or crops at a construction site or an agricultural site, or carrying tools necessary for various operations.

In addition, unlike the conventionally equipped with a mechanical engine, in recent years, the research and development for the electric drive-type multi-purpose transport vehicle with no noise and extremely low noise has been actively conducted. The electric drive multi-purpose transport vehicle basically consists of a structure including an electric drive motor and a battery that is an energy source, and the electric drive motor is capable of moving the vehicle by using electricity supplied from the battery as a power source.

The conventional electric drive multi-purpose transport vehicle adopts a single motor drive type that is driven mostly as a single motor. However, such a single motor drive type has a disadvantage in that the output is reduced, and if a problem occurs in the drive motor or a corresponding wiring system supplying electricity to the drive motor, it becomes impossible to travel and must be moved to the workshop using a separate tow vehicle. And, there is a problem that is accompanied by time and economic losses.

In addition, due to the characteristics of the motor which outputs a constant output regardless of the number of revolutions, the conventional electric drive type multi-purpose vehicle has a disadvantage in that it is difficult to drive at low speeds in a poor environment such as unpaved roads or sloped slopes, or battery consumption increases at high speeds. have. In other words, it is pointed out that the implementation of low RPM high torque for the rough road driving or low RPM high speed for the high-speed driving is not possible, the overall driving performance and power efficiency is reduced.

The problem to be solved by the present invention is to provide an electric drive multi-purpose transport vehicle using two drive motors, to provide a dual motor type electric drive multi-purpose transport vehicle that can output a high output using two low-power motor.

In addition, the present invention is to provide a dual motor type electric drive multi-purpose transport vehicle capable of emergency driving as one drive motor even if a problem occurs in one drive motor or related wiring system.

In addition, another problem to be solved by the present invention is an electric drive multi-purpose transport vehicle that is driven by electricity, low-RPM high torque for rough road driving and slope climbing and low RPM for stable high-speed driving while reducing battery consumption It is to enable high speed.

As a means for solving the above problems, the present invention is a multi-purpose transporting vehicle that is driven by electricity, including a drive unit, a power supply unit, a control unit, a power transmission unit; The power transmission portion comprises a front differential at the front wheel side and a rear differential at the rear wheel side; The driving unit is disposed in the center of the vehicle body close to the rear differential device, and the driving unit is composed of two driving motors, a transmission, and parallelly spaced apart, and synthesized between the two driving motor outputs and transferred to the transmission. An output; The front wheel and the rear wheel drive shaft extends from the transmission to the front and rear of the body to provide a dual motor type electric drive multi-purpose transport vehicle, characterized in that the power transmission is connected to the front and rear differentials, respectively.

In this embodiment, the driver's seat space is provided on the vehicle body frame between the front wheel and the rear wheel, the seat space for seating is provided, the mounting space for mounting the battery pack constituting the power supply unit in the seat portion lower portion Is formed.

In addition, a deck is provided above the vehicle body frame behind the seat portion, a rear differential device is disposed below the deck rear side, and the drive unit is disposed between the rear differential device and the battery mounting space.

In addition, the composite output unit, a case; A first input shaft rotatably mounted in the case and electrically connected to one drive motor output shaft; A second input shaft rotatably disposed in a case spaced apart from and parallel to the first input shaft by a distance between the driving motors and electrically connected to the other driving motor output shaft; And a composite output shaft disposed between the first input shaft and the second input shaft and electrically coupled to the first and second input shafts at the same time.

In this case, the first and second input shafts and the composite output shaft may be configured to be electrically connected to each other via the first and second drive gears and the driven gears formed on each axis.

In the present embodiment, in consideration of the overall layout of the vehicle body, it is preferable that the driving portion is disposed laterally to match the vehicle body frame width direction.

The control unit includes a drive inverter for converting a DC current provided to the power supply unit into an AC current required to operate the drive unit; A controller for controlling a current supplied from the power supply unit to the driving motor constituting the driving unit according to a pedal operation; A DC / DC converter for boosting or lowering the DC current provided to the power supply to a DC current necessary for driving an external device; And a relay to control the power supply from the power supply unit according to a user key manipulation.

In this case, the controller may be fixed to the vehicle body frame at a position spaced upward from the driver.

According to an electric drive-type multi-purpose transport vehicle according to an embodiment of the present invention, a dual motor type using two drive motors, the power output to each drive motor can be combined to one output from the combined output and output to the transmission side Has Accordingly, the advantage that the high-power multi-purpose transport vehicle can be implemented without using a large motor having a large size to produce a high output.

In addition, by using two motors, even if a problem occurs in any one of the drive motor or the associated wiring system, it is possible to emergency run as the other drive motor. Therefore, it becomes impossible to travel as in the prior art, and has to be moved to a maintenance shop by using a separate tow vehicle or the like, and there is an advantage in that it is possible to solve the problem associated with time and economic losses.

Moreover, unlike the prior art in which the output by the drive motor is directly transmitted as the power for driving the wheel, the motor output can be realized according to the driving target such as slope slope, rough road driving, and high speed driving through the transmission in the middle. By converting the output into a wheel structure, the overall driving performance and power efficiency can be further improved.

1 is a perspective view of a dual motor type electric drive multi-purpose transport vehicle according to an embodiment of the present invention.
Figure 2 is a plan view schematically showing the overall arrangement of the device elements constituting the dual motor type electric drive multi-purpose transport vehicle according to an embodiment of the present invention.
3 to 7 respectively show a left side view, a right side view, a front view, a rear view, and a bottom view according to FIG. 2.
Figure 8 is an enlarged cross-sectional view showing the main part of the main structure of the dual motor type electric drive multi-purpose transport vehicle according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the present invention, a detailed description of known configurations will be omitted, and a detailed description of configurations that may unnecessarily obscure the gist of the present invention will be omitted.

1 is a perspective view of a dual motor type electric drive multi-purpose transport vehicle according to an embodiment of the present invention, a plane for showing the overall arrangement structure of the device elements constituting the dual motor type electric drive multi-purpose transport vehicle shown in FIG. Schematic diagram. 3, 4, 5, 6, and 7 indicate left, right, front, rear, and bottom views of the transport vehicle according to the present invention shown in the plan view of FIG. 2, respectively.

1 to 7, an electric drive multi-purpose transport vehicle according to an embodiment of the present invention includes a driving unit 7, a power supply unit 5, a control unit 8, and a power transmission unit 9. The power transmission unit 9 is composed of a front differential device 9a at the center of the front wheel side and a rear differential device 9b at the center of the rear wheel side, and the front and rear drive shafts 10a (front and rear) from the drive unit 7 to the vehicle body. 10b) is extended, and the front wheel and rear wheel drive shafts 10a and 10b are connected to the front differential device 9a and the rear differential device 9b so as to be capable of power transmission.

A pair of left and right front wheels 1a and rear wheels 1b are rotatably mounted on an axis extending left and right from the front differential device 9a and the rear differential device 9b, and the front wheel 1a and the rear wheel 1b. The driver's seat space 2 is provided on the body frame between the driver and passengers. The driver's seat space 2 is provided with a seat portion 3 for seating, and various manipulation devices are disposed on the driver's seat space 2 front side, including steering (not shown) for steering.

A battery mounting space 4 is formed in the vehicle body frame positioned below the seat 3, and a battery pack is mounted in the battery mounting space 4, in particular, a power supply 5 for supplying energy for driving a vehicle. . And a deck (6) for mounting a package or crop is mounted to the rear of the seat (3), the rear differential device (9b) for driving the rear wheel (1b) is arranged below the deck (6) The driving unit 7 is disposed between the battery mounting space 4.

The driving unit 7 shifts the outputs of two driving motors 70a and 70b (see FIG. 8) and two driving motors 70a and 70b which generate power for driving the vehicle to a power suitable for driving. And a synthesizer output unit 74 which is disposed between the transmission 72 and the two driving motors 70a and 70b and synthesizes the outputs of the two driving motors 70a and 70b and transmits the outputs to the transmission 72. The front wheels and rear wheel drive shafts 10a and 10b extend from the transmission 72 to the front and rear of the vehicle body.

The drive motor 70 and the transmission 72 constituting the drive unit 7 may be provided so as to form a transverse direction along the vehicle frame width direction as shown in FIG. 2 or FIG. 7. If the driving unit is configured to be disposed laterally with respect to the vehicle body frame, it is advantageous in that power output through the transmission 72 is transmitted to the front and rear differential devices 9a and 9b through the front and rear wheel drive shafts. This is because it is advantageous to use the space on the entire layout more efficiently.

The power supply unit 5, which provides electric energy as a power source to the driving unit 7 and two driving motors 70a and 70b constituting the driving unit, is electrically connected to each other via the control unit 8. The controller 8 controls the starting and the operation of the driver 7 as a whole based on a driver's operation. The configuration of the controller 8 applied to the present embodiment will be described in more detail below.

The control unit 8 electrically connects the drive unit 7 and the power supply unit 5, and is also electrically connected to the signal input unit 12, such as a pedal or a hand lever, related to driving a motor disposed in a driver's seat. Accordingly, when an operation command for operating the driving motor 70 is input from the signal input means 12, the rotational speed of the motor is controlled by the controller 8 based on the value set through the signal input means 12. The control to keep is performed.

In this embodiment, the control unit 8 specifically includes a drive inverter 80, a controller 82, a DC / DC converter 84, and a relay 86. The drive inverter 80 converts a DC current provided to the power supply unit 5 into an alternating current required to operate the drive unit 7, and the controller 82 controls the signal input unit 12, for example, when the pedal is operated. The driving of the vehicle is substantially controlled by controlling the current supplied from the power supply unit 5 to the driving motor 70 constituting the driving unit 7.

The DC / DC converter 84 functions to step up or down the DC current provided to the power supply unit 5 to the DC current required to drive the external device, and the relay 86 performs the power supply unit 5 according to a user key operation. Check the power supply from). The control unit 8 having the above-described configuration has a body frame at a position spaced upward from the driving unit 7 behind the power supply unit 5 so that the influence of radiant heat from the power supply unit 5 and the driving motor 70 can be minimized. Good to place on.

8 is an enlarged cross-sectional view showing main parts of an internal structure of a dual motor type multi-purpose transport vehicle according to an exemplary embodiment of the present invention.

Referring to FIG. 8, the two drive motors 70a and 70b have a parallel arrangement structure in which each output shaft 71a and 71b are parallel to each other in the vehicle width direction, and the composite output unit 74 drives two drives. It is disposed between the motor 70a, 70b and the transmission 72 so that one side and the other side thereof are coupled to the driving motor 70a, 70b side and the transmission 72 side, respectively.

Specifically, the composite output 74 is between a case 74c, a first input shaft 74a and a second input shaft 74b, and these input shafts 74a and 74b, as shown in the figure. It consists of the composite output shaft 74d arrange | positioned.

The first input shaft 74a and the second input shaft 74b are rotatably installed in the case 74c while being parallel to each other by a distance equal to the distance between the driving motors 70a and 70b, and each input shaft 74a ( 74b) the front end is coupled to each of the output shafts 71a and 71b of the two driving motors 70a and 70b, and is formed between the first input shaft 71a and the second input shaft 71b in the case 74c. The composite output shaft 74d is rotatably installed so as to be rotatably connected with the first and second input shafts.

When the first and second input shafts 74a and 74b and the composite output shaft 74d are electrically connected to each other to realize the synthesis of the outputs, the first and second input shafts 74a and 74b are formed on each of the first and second input shafts 74a and 74b. The second drive gears 740a and 740b are simultaneously engaged with the driven gear 740d formed on the combined output shaft 74d and rotated in the same direction to adopt two drive motor outputs. A configuration capable of synthesizing the force and outputting the same may be adopted.

In the drawing, reference numeral B denotes a bearing that freely supports each axis.

According to the embodiment of the present invention as described above, as a dual motor type using two drive motors, the power output to each drive motor has a configuration that can be combined to one output from the combined output and output to the transmission side. Accordingly, the advantage that the high-power multi-purpose transport vehicle can be implemented without using a large motor having a large size to produce a high output.

In addition, by using two motors, even if a problem occurs in any one of the drive motor or the associated wiring system, it is possible to emergency run as the other drive motor. Therefore, it becomes impossible to travel as in the prior art, and has to be moved to a maintenance shop by using a separate tow vehicle or the like, and there is an advantage in that it is possible to solve the problem associated with time and economic losses.

Moreover, unlike the prior art in which the output by the drive motor is directly transmitted as the power for driving the wheel, the motor output can be realized according to the driving target such as slope slope, rough road driving, and high speed driving through the transmission in the middle. By converting the output into a wheel structure, the overall driving performance and power efficiency can be further improved.

In the foregoing detailed description of the present invention, only specific embodiments thereof have been described. It is to be understood, however, that the invention is not to be limited to the specific forms thereof, which are to be considered as being limited to the specific embodiments, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims. .

1a, 1b: front wheel, rear wheel 2: driver's seat space
3: seat portion 4: battery mounting space
5: battery pack 6: deck
7: drive unit 8: control unit
9: Power transmission section
9a, 9b: front differential, rear differential
10a, 10b: front wheel drive shaft, rear wheel drive shaft
12: signal input means 70a, 70b: drive motor
72: transmission 74: composite output
80: drive inverter 82: controller
84: DC / DC converter 86: relay

Claims (8)

As a multipurpose transport vehicle that runs on electricity,
A driving unit, a power supply unit, a control unit, and a power transmission unit;
The power transmission portion comprises a front differential at the front wheel side and a rear differential at the rear wheel side;
The driving unit is disposed in the center of the vehicle body close to the rear differential device, and the driving unit is composed of two driving motors, a transmission, and parallelly spaced apart, and synthesized to transfer the outputs of the two driving motors to the transmission. An output;
And a front and rear wheel drive shafts extending from the transmission to the front and rear of the vehicle body so as to be capable of power transmission with the front and rear differential devices, respectively.
The method of claim 1,
The driver's seat space is provided on the vehicle body frame between the front wheel and the rear wheel, and the seat space for seating is provided in the driver's seat space, and a mounting space for mounting a battery pack constituting a power supply unit is formed under the seat portion. Dual motor type electric drive multi-purpose vehicle.
3. The method of claim 2,
A dual motor type electric drive, characterized in that the deck is mounted on the upper body frame behind the seat portion, the rear differential device is disposed on the lower side of the deck rear side, and the drive unit is disposed between the rear differential device and the battery mounting space. Formula multi-purpose vehicles.
The method of claim 1,
The composite output device,
case;
A first input shaft rotatably mounted in the case and electrically connected to one drive motor output shaft;
A second input shaft rotatably disposed in a case spaced apart from and parallel to the first input shaft by a distance between the driving motors and electrically connected to the other driving motor output shaft; And
And a combined output shaft disposed between the first input shaft and the second input shaft, the composite output shaft being electrically connected to the first and second input shafts at the same time.
The method of claim 4, wherein
And the first and second input shafts and the combined output shafts are electrically connected to each other by means of first and second drive gears and driven gears formed on the respective shafts.
The method of claim 1,
And the drive unit is disposed laterally to correspond to the vehicle frame width direction.
The method of claim 1,
The control unit,
A drive inverter for converting a DC current provided to the power supply unit into an AC current required for driving the drive unit;
A controller for controlling a current supplied from the power supply unit to the driving motor constituting the driving unit according to a pedal operation;
A DC / DC converter for boosting or lowering the DC current provided to the power supply to a DC current necessary for driving an external device; And
And a relay for intermittent power supply from the power supply unit in response to a user key manipulation.
The method of claim 7, wherein
The control unit is an electric drive multi-purpose transport vehicle, characterized in that fixed to the vehicle body frame at a position spaced upwardly from the drive.

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