JP6749269B2 - Work vehicle - Google Patents

Description

The present invention includes a traveling output device of two systems including an engine configured by an internal combustion engine and an assist motor configured by an electric motor, and the driving force from the engine and the assist motor to the driven device side. The present invention relates to a hybrid work vehicle provided with a CVT transmission device for transmission.

Regarding this type of work vehicle, there is a conventional technique described in [1] below.
[1] A CVT transmission device (belt continuously variable transmission 32 in Patent Document 1) is provided on one lateral side of the engine, and an assist motor (patent document 1 in the patent document 1) is provided in a case cover of the CVT transmission device (Patent Document 1). In Document 1, there is a structure in which a motor M) is provided (see Patent Document 1).

JP-A-2014-133489 (paragraph numbers “0031”, “0032”, see FIGS. 2 and 3)

In the above [1], the motor is located on the side opposite to the side where the engine is located with the CVT transmission interposed, and the motor is provided inside the case cover via the support bracket and the clutch case. It is fixed to the engine block and is entirely covered with a case cover.
Therefore, when it becomes necessary to perform maintenance or belt replacement of the CVT transmission, remove the case cover to expose the CVT transmission and the motor, remove the motor, and then perform maintenance such as belt replacement of the CVT transmission. It was necessary to perform inspection work. For this reason, not only does maintenance and inspection work require a great deal of work, but since the motor itself is a heavy object, it is necessary to prepare a lifting device such as a crane, which makes it difficult to perform simple maintenance and inspection work. There is room for improvement.

The present invention makes it possible to easily perform maintenance and inspection work such as belt replacement of a CVT transmission in a work vehicle having a structure in which a motor is disposed on the side opposite to the side where the engine is present with the CVT transmission interposed therebetween. It is what

In order to solve the above problems, in a work vehicle according to the present invention, a CVT transmission device to which a driving force from the engine is transmitted is disposed on a lateral side portion of the engine, and the engine of the CVT transmission device is present. An assist motor is disposed on the lateral outer side opposite to the side, the output shaft of the assist motor is positioned coaxially with the drive shaft of the CVT transmission, and the drive shaft and the output shaft are interlockingly connected. A motor support base that is configured to be capable of supporting the assist motor is extended toward the lateral outside of the vehicle from the location where the CVT transmission is present, and the motor support base is configured to drive the drive shaft of the CVT transmission. Is provided with a slide movement mechanism capable of moving the mounting position of the assist motor with respect to the CVT transmission device in a perspective direction, and the slide movement mechanism is capable of connecting the drive shaft and the output shaft. It is characterized in that the mounting position of the assist motor with respect to the CVT transmission can be changed over the position and the position where the connection between the drive shaft and the output shaft is released.

Advantageous Effects of Invention According to the present invention, the motor support base extending toward the lateral outside of the machine from the location where the CVT transmission exists is slidably movable in the direction along the axis of the drive shaft of the CVT transmission. A mechanism is provided, and the mounting position of the assist motor can be changed between a position where the drive shaft and the output shaft can be connected and a position where the connection is released.
Therefore, the mounting position of the assist motor with respect to the CVT transmission can be moved in the distance while the assist motor is supported on the motor support base, and the position of the assist motor can be adjusted without requiring a heavy lifting device such as a crane device. There is an advantage that the maintenance and inspection work such as changing the belt of the CVT transmission device can be easily performed by changing it.

In the present invention, the motor support base is an extension frame portion that extends laterally outward of the CVT transmission device in the vehicle body frame to which the engine and the CVT transmission device are attached, and the extension portion thereof. A motor mounting frame mounted so as to be movable relative to a frame part, the slide moving mechanism is provided between the extension frame part and the motor mounting frame, and the assist motor is mounted on the motor mounting frame. It is preferably attached.

According to the present invention, since the motor mounting frame that is movable relative to the extension frame portion is provided separately from the extension frame portion of the vehicle body frame, the extension frame portion on the vehicle body frame side can be made relatively compact. Easy to form. That is, if it is attempted to secure the mounting range of the assist motor and its moving range only by the extension frame portion on the vehicle body frame side, the extension length of the extension frame portion in the direction along the axial center of the drive shaft of the CVT transmission device. However, a slide movement mechanism is provided between the motor mounting frame and the motor mounting frame that is relatively movable, so that the extension frame can be extended to the extent that the movement range of the assist motor can be secured. All you have to do is prepare for the length.

In the present invention, in the slide movement mechanism, a long hole having a long diameter in the direction along the axis of the drive shaft of the CVT transmission is formed in either the extension frame portion or the motor mounting frame. It is preferable that the guide member that is engaged with and guided by the elongated hole is formed on the other one of the extending frame portion and the motor mounting frame.

According to the present invention, the slide movement mechanism uses a long hole having a long diameter in a direction along the axis of the drive shaft of the CVT transmission device and a guide member engaged with and guided by the long hole. It is made up of structures.

It is a left side view of the utility vehicle which is an example of the work vehicle in the present invention. It is a top view of a utility vehicle. It is a diagram showing a power transmission system of the utility vehicle. It is a left side view showing a prime mover of a utility vehicle. It is a front view which shows the prime mover of a utility vehicle. It is a perspective view showing a prime mover of a utility vehicle. It is an exploded perspective view showing an assist motor and a motor support stand. FIG. 3 is a horizontal cross-sectional view showing a transmission structure from an engine and an assist motor to a CVT transmission device. It is a top view which shows an assist motor and a motor support stand. FIG. 10 is a sectional view taken along line XX in FIG. 9. It is a top view which shows an assist motor and a motor support stand.

Hereinafter, an example of an embodiment of a work vehicle according to the present invention will be described based on the description of the drawings.
In addition, the front-rear direction and the left-right direction in the description of the present embodiment are described as follows unless otherwise specified. That is, the forward traveling direction (see arrow F in FIG. 2) of the traveling machine body in the work vehicle to which the present invention is applied is “forward”, and the backward traveling direction (see arrow B in FIG. 2) is “Rear”, the direction corresponding to the right side (see arrow R in FIG. 2) with respect to the forward facing posture in the front-rear direction is “right”, and the direction corresponding to the left side (see arrow L in FIG. 2) is the same. "Left".

〔overall structure〕
Here, a case where the present invention is applied to a utility vehicle which is an example of a work vehicle will be described.
As shown in FIGS. 1 and 2, the utility vehicle includes a pair of left and right front wheels 1F that can be steered at a front portion of a vehicle body frame 1 forming a framework of a traveling vehicle body, and a rear portion of the vehicle body frame 1 is provided. A pair of left and right uncontrollable rear wheels 1R are supported.
A driving unit 10 is provided at the center of the traveling machine body in the front-rear direction and above the vehicle body frame 1. A luggage carrier 2 is provided on an upper side of the vehicle body frame 1 at a rear portion of the traveling machine body, and a driving portion 3 is provided below the luggage carrier 2.

A driving force can be transmitted to the front wheels 1F and the rear wheels 1R from an engine E and an assist motor M provided in a drive unit 3 described later. As a result, the utility vehicle is configured as a four-wheel drive traveling four-wheel drive vehicle and is used for multipurpose work such as agricultural work and transportation work. A lops frame 11 that protects the driving unit 10 is provided at a position surrounding the driving unit 10.

The loading platform 2 has a function of discharging a load in a dumping manner by raising the front end side around a horizontal axis in the left-right direction at a position near the rear end thereof, It is swingably supported around the axis. Further, a hydraulic actuator (not shown) for moving up and down the front end side of the loading platform 2 is provided.

The driver 10 has a driver's seat 12 on which the driver sits, a steering wheel 13 for steering and controlling the front wheels 1F, a speed change lever 14, an accelerator pedal 15 for controlling the traveling speed, and the front wheels 1F. And a brake pedal 16 for operating a brake device 17 of the rear wheel 1R. The passenger seat is arranged adjacent to the driver's seat 12. The driver's seat 12 is composed of a bench seat including a single horizontally long seat base and a single horizontally long seat back. ing.
A fuel tank (not shown) for supplying fuel to the engine E and a battery 8 for supplying electric power to the assist motor M are arranged in a seat lower space corresponding to the lower side of the driver's seat 12. There is.

[Structure of drive part]
As shown in FIG. 2 and FIG. 3, a driving unit 3 is provided at a rear portion of the traveling machine body so as to be positioned below the luggage carrier 5.
The engine 3 includes a water-cooled gasoline engine E (hereinafter simply referred to as engine) which is an internal combustion engine, an assist motor M (hereinafter simply referred to as assist motor) configured by an electric motor, and a mission. A case 30 and a dry CVT transmission 4 are provided. The transmission case 30 has a gear shift mechanism 31 and a differential mechanism 32 built therein. At the lower end of the mission case 30, a pair of left and right rear wheel drive shafts 33 that transmit the driving force from the differential mechanism 32 to the rear wheels 1R are provided.

A power take-off shaft 34 that protrudes forward is provided at the lower end of the mission case 30. A transmission shaft 35 to which the driving force of the power take-off shaft 34 is transmitted is provided in the lower portion of the traveling machine body, and is transmitted to a front wheel differential mechanism 36 to which the driving force of the transmission shaft 35 is transmitted to the front portion of the traveling machine body. A front wheel drive shaft 37 that transmits the driving force of the differential mechanism 36 to the front wheels 1F is provided.
A brake device 17 is provided at the shaft ends of the pair of left and right front wheel drive shafts 37 and the shaft ends of the pair of left and right rear wheel drive shafts 33. These brake devices 17 function to apply a braking force to the front wheels 1F and the rear wheels 1R by operating the brake pedal 16.

The gear shift mechanism 31 provided in the mission case 30 is operated to shift by operating the shift lever 14. This gear shift mechanism 31 realizes a change in the traveling speed of the traveling machine body (high speed and low speed) and a switching of the traveling direction (switching between forward and reverse) according to the operation of the shift lever 14. The speed change lever 14 is designed so that the traveling speed can be set and the forward/backward movement can be switched by a single lever operation. For example, the speed change lever and the forward/backward changeover can be performed. The advance lever and the lever may be configured separately.

As shown in FIG. 2, FIG. 3, and FIG. 5, the engine E is arranged in the drive unit 3 with the crankshaft 3 a in a horizontal posture. The mission case 30 is arranged at a position adjacent to the rear of the crankshaft 3a with the input shaft 3b in a horizontal posture. A muffler 38 (see FIG. 4) that is long in the front-rear direction is disposed on the upper lateral side of the transmission case 30 on the rear side of the engine E.
A CVT transmission device 4 that transmits the power of the engine E to the mission case 30 is arranged at a side position of the engine E and the mission case 30. An assist motor M is arranged on the side opposite to the engine E with the CVT transmission 4 interposed therebetween.

[CVT transmission device]
As shown in FIGS. 3 and 8, the CVT transmission device 4 includes a drive pulley 41 (corresponding to a driving rotating body of the present invention) capable of changing the belt winding diameter and a driven pulley capable of changing the belt winding diameter. It has a pulley 42 (corresponding to a driven rotating body of the present invention), and a rubber endless belt 43 wound around the drive pulley 41 and the driven pulley 42. These are housed in the transmission case 44. A metal belt may be used as the endless belt 43.

A centrifugal clutch 39 is provided between the engine E and the CVT transmission device 4 to connect and disconnect the rotational driving force from the crankshaft 3 a of the engine E to the CVT transmission device 4. A drive shaft 40 provided on the output side of the centrifugal clutch 39 is provided with a drive pulley 41 of the CVT transmission device 4.
The drive shaft 40 is rotatably supported by a bearing 45a provided on the clutch case 45 in the vicinity of the end on the engine E side, and is rotated by a bearing 47a provided on the support bracket 47 in the vicinity of the end on the assist motor M side. It is supported freely. A driven pulley 42 is provided on the input shaft 3b of the mission case 30. The drive shaft 40 of the centrifugal clutch 39 is arranged coaxially with the crankshaft 3a.

The centrifugal clutch 39 is in the disengaged state when the rotation speed of the crankshaft 3a is a low speed rotation lower than the set value, and does not transmit the rotation force of the crankshaft 3a to the drive shaft 40. When the rotational speed of the crankshaft 3a exceeds the set value, the crankshaft 3a reaches the connected state and operates so as to transmit the rotational force of the crankshaft 3a to the drive shaft 40.

The drive pulley 41 includes a fixed sheave 41A arranged on the base end side of the drive shaft 40 (a side closer to the engine E) and a movable sheave 41B arranged on the tip end side of the drive shaft 40. Further, a winding diameter adjusting mechanism 46 for adjusting the position of the movable sheave 41B is provided at the protruding end of the drive shaft 40.

The winding diameter adjusting mechanism 46 moves the movable sheave 41B in a direction closer to the fixed sheave 41A as the rotation speed of the drive shaft 40 increases, thereby enlarging the belt winding diameter of the drive pulley 41. .. On the contrary, as the rotational speed of the drive shaft 40 becomes slower, the movable sheave 41B is moved in a direction of separating from the fixed sheave 41A to reduce the belt winding diameter of the drive pulley 41. ..

The driven pulley 42 fixes the movable sheave 42A arranged on the base end side of the input shaft 3b (the side close to the mission case 30), the fixed sheave 42B arranged on the tip end side of the input shaft 3b, and the movable sheave 42A. It has a coil spring 42C that applies a biasing force in a direction of approaching the sheave 42B.

The coil spring 42C exerts an urging force for determining the position of the movable sheave 42A of the driven pulley 42 in accordance with the tension acting on the endless belt 43. That is, when the belt winding diameter of the drive pulley 41 changes, the tension acting on the endless belt 43 changes. As the tension increases, the movable sheave 42A is separated from the fixed sheave 42B, and as the tension decreases, the movable sheave 42A approaches the fixed sheave 42B. Therefore, when the belt winding diameter of the drive pulley 41 is small, the belt winding diameter of the driven pulley 42 is set to a large value, and conversely, when the belt winding diameter of the drive pulley 41 is increased. Is set to a value such that the belt winding diameter of the driven pulley 42 is small.

The assist motor M, which is arranged on the opposite side of the engine E with the drive pulley 41 interposed therebetween, is arranged so that the output shaft 50 faces the lateral direction (the drive pulley 41 side). In the present embodiment, the assist motor M is attached to the outer end portion of the support bracket 47 by, for example, a bolt or the like. The output shaft 50 is arranged coaxially with the drive shaft 40. The drive shaft 40 is extended to the output shaft 50, a coupler 48 is provided between the output shaft 50 and the drive shaft 40, and the coupler 48, the output shaft 50, and the coupler 48 and the drive shaft 40 are spline-fitted. .. Since the coupler 48 is supported by the bearing 47a provided on the support bracket 47, the output shaft 50 and the drive shaft 40 are integrally rotatably supported.

As shown in FIGS. 3 and 8, the transmission case 44 (corresponding to a case member of the present invention) includes a case body 44A supported on the vehicle body side (at least one of the mission case 30 and the engine E), and the case body. 44A, and a cover body 44B that is supported so as to be separable from the 44A. A clutch case 45 surrounding the centrifugal clutch 39 is connected to a cylinder block of the engine E, and the clutch case 45 is connected to a case body 44A of the transmission case 44. A support bracket 47 is attached to the case body 44A and the clutch case 45 with, for example, bolts.

The cover body 44B is formed in a shape capable of accommodating the drive pulley 41, the winding diameter adjusting mechanism 46, and the driven pulley 42 from the lateral outside. The cover body 44B and the case body 44A have a structure in which flange surfaces 44Ba and 44Aa are formed on the outer circumference. Then, the case body 44A and the cover body 44B are bolted in such a manner that the flange surface 44Aa of the case body 44A and the flange surface 44Ba of the cover body 44B are opposed to each other and a sealing material (not shown) such as rubber is sandwiched therebetween. Etc. (not shown).
With this structure, it is possible to remove only the cover body 44B while the case body 44A is supported on the vehicle body side (at least one of the mission case 30 and the engine E).

As shown in FIG. 8, an opening 49 is formed in a portion of the cover body 44B through which the output shaft 50 of the assist motor M and the coupler 48 pass, and the opening 49 has the opening 49 of the output shaft 50 and the coupler 48. A tubular member 51 that covers the outer peripheral side is fixed in an inserted state.
The end of the tubular member 51 near the drive pulley 41 penetrates the opening 49 and is fixedly connected to the support bracket 47 via a fixing bolt 52.
Then, the end of the tubular member 51 on the side facing the assist motor M is appropriately bolted or the like (not shown) while being in contact with the motor mounting frame 6B of the motor support base 6 supporting the assist motor M. It is connected and fixed.

[Motor support base]
The motor support base 6 that supports the assist motor M is configured as shown in FIGS. 4 to 11.
The motor support base 6 includes an extending frame portion 6A protruding outward from the main frame 1A, which is located on the left lateral side portion of the vehicle body frame 1 and is long in the front-rear direction, and an extending frame portion 6A. On the other hand, the motor mounting frame 6B is mounted so as to be relatively movable in the left-right direction.

The extension frame portion 6A includes a base plate member 60 having an upward mounting surface 60a, side ribs 61 bent downward on both front and rear ends of the base plate member 60, and an intermediate portion between the front and rear side ribs 61. Is formed in a shape including an intermediate rib 62 provided on the lower side of the base plate member 60, and an end portion on the side close to the main frame 1A is welded and fixed to the main frame 1A to partially cover the body frame 1. I am configuring.

The motor mounting frame 6B has a channel-shaped guide member 63 whose lower surface is placed on the base plate member 60 of the base plate member 60, and a longitudinal direction in the direction of the output shaft 50 of the assist motor M on both front and rear sides of the guide member 63. The slide frame body 66 includes a horizontal member 64 along which the vertical frame members 65 connect the left and right ends of the front and rear horizontal members 64.
In addition, lower portions of a total of four channel-shaped connecting members 67 in plan view are attached to the front and rear ends of the left and right vertical frame members 65 of the slide frame 66 via connecting bolts 67a. A pair of left and right end support frames 68 are connected and fixed to the upper side of the connecting member 67 via connecting bolts 67b to form a motor mounting frame 6B capable of supporting the assist motor M. ..

The left and right ends of the assist motor M face the left and right end support frames 68, and the left and right ends of the assist motor M are appropriately sandwiched between the left and right end support frames 68 via connecting bolts or the like (not shown). The parts are connected to the end support frame 68.
Then, the left and right end support frames 68 connected with the assist motor M are connected and fixed to the slide frame body 66, and the slide frame body 66 is mounted on the base plate member 60 of the extension frame portion 6A and connected and fixed.

The slide frame body 66 is connected and fixed to the base plate member 60 of the extension frame portion 6A via the slide movement mechanism 7.
As shown in FIGS. 7 and 9 to 11, the slide moving mechanism 7 has a length formed on the channel-shaped guide member 63 of the slide frame 66 along the direction of the output shaft 50 of the assist motor M. The hole 70 and one connecting bolt 71 (corresponding to a guide member) attached to the base plate member 60 in a state of penetrating the elongated hole 70 are provided.

Three connecting bolts 71 are attached to the base plate member 60, including a connecting bolt 71 provided at a position penetrating the elongated hole 70. Then, the mounting surface 60a of the base plate member 60 is provided with three through holes 60b through which the connecting bolts 71 are inserted. The connecting bolt 71 penetrating the elongated hole 70 penetrates both the elongated hole 70 and the through hole 60 b provided near the extending end of the base plate member 60, as shown in FIGS. 7 and 9 to 11. It is provided in a ready state.
The connecting bolts 71, 71 other than the connecting bolt 71 penetrating the long hole 70 pass through the through holes 60b, 60b provided near the base end of the base plate member 60, and are placed horizontally before and after the guide member 63. It is connected and fixed to the member 64. Each connecting bolt 71 is individually provided so that it can be tightened, loosened, and detached.

Therefore, the assist motor M is configured to be movable relative to the extension frame portion 6A in the perspective direction with respect to the main frame 1A while being supported by the motor mounting frame 6B.
That is, in the extension frame portion 6A, the two connecting bolts 71 attached to the base plate member 60 at a position close to the end portion on the side connected to the main frame 1A are removed, and a position where the connecting bolt 71 penetrates the elongated hole 70 is removed. By loosening the tightening force by the connecting bolt 71, the slide frame 66 can be slid in the longitudinal direction of the elongated hole 70 while being mounted on the extension frame portion 6A.

As a result, in the motor mounting frame 6B, all the three connecting bolts 71 are inserted into the through holes 60b of the base plate member 60 with the assist motor M being closest to the vehicle body frame 1, as shown in FIG. Fixed. As a result, the assist motor M is fixed at a position where normal work traveling can be performed.
From this working traveling state, the two connecting bolts 71 attached to the base plate member 60 at a position close to the end on the side connected to the vehicle body frame 1 are removed, and only the connecting bolt 71 at a position penetrating the elongated hole 70 is removed. 11 and the tightening force of the connecting bolt 71 is loosened, as shown in FIG. 11, the motor mounting frame 6B with respect to the extension frame portion 6A and the main frame while being supported by the extension frame portion 6A are maintained. It can be moved laterally away from 1A.

The length of the long hole 70 in the major axis direction is such that when the motor mounting frame 6B is pulled out to the maximum lateral side, a cover body 44B is provided between the motor mounting frame 6B and the transmission case 44 of the CVT belt transmission 4. It is set to such an extent that it can be removed to create a space in which the endless belt 43 of the CVT belt transmission 4 can be attached and detached.
Therefore, it is possible to move the assist motor M, which is a heavy object, away from the CVT belt transmission 4 in a state of being supported by the motor mounting frame 6B without having to be lowered from the machine body.

(Drive control)
An example of drive control of the utility vehicle will be described.
The utility vehicle is driven by the assist motor M at low speed (low rotation speed) and by the engine E (or the engine E and the assist motor M) at high speed (high rotation speed). Specifically, when the accelerator pedal 15 is operated, power is supplied to the assist motor M from a power supply unit (not shown), and the assist motor M is rotationally driven. The engine E is not driven until the accelerator pedal 15 is operated to a predetermined operation position (first predetermined position), and only the assist motor M is driven at a rotation speed corresponding to the operation position of the accelerator pedal 15. At this time, since the engine E is not driven, the rotation speed of the engine E is less than the set value and the centrifugal clutch 39 is in the disengaged state. Therefore, the rotational driving force of the assist motor M is input to the input shaft 3b of the mission case 30 via the CVT transmission device 4, and the utility vehicle is driven.

When the accelerator pedal 15 is operated to a predetermined operation position (first predetermined position), the engine is started and rotationally driven at a rotation speed corresponding to the operation position of the accelerator pedal 15. However, the engine rotation speed is less than the set value until the accelerator pedal 15 is operated to the operation position (second predetermined position) corresponding to the set value of the engine rotation speed in which the centrifugal clutch 39 is engaged. The centrifugal clutch 39 is in the disengaged state.
Therefore, the rotational driving force of the engine E (crankshaft 3a) is not transmitted to the drive shaft 40. Therefore, similarly to the above, the rotational driving force of the assist motor M is input to the input shaft 3b of the mission case 30 via the CVT transmission device 4, and the utility vehicle is driven. When the operation position of the accelerator pedal 15 reaches the second predetermined position, the rotation speed of the engine E reaches the set value, the centrifugal clutch 39 enters the connected state, and the rotational driving force of the engine (crankshaft 3a) is transmitted to the drive shaft 40. It When the accelerator pedal 15 is operated beyond the second predetermined position, the engine E and the assist motor M are rotationally driven at a rotation speed corresponding to the operation position of the accelerator pedal 15, and the rotational driving force of the engine E and the assist motor M is increased. Is input to the input shaft 3b of the mission case 30 via the CVT transmission device 4, and the utility vehicle is driven.

During braking of the utility vehicle, the driving of the engine E is stopped (the engine speed becomes less than the set value), the centrifugal clutch 39 is disengaged, and braking and deceleration are performed by the regenerative braking by the assist motor M. The electric power generated at this time is stored in the battery 8.

The activation of the assist motor M and the engine and the control of the rotation speeds of the assist motor M and the engine E are performed by, for example, a control unit (not shown). Specifically, the accelerator pedal 15 is provided with operation position detecting means such as a rotation sensor. The control unit performs the above control based on the detection signal from the operation position detecting means.

The control of the rotation speed of the engine E is not limited to the above, and for example, a mechanical governor may be used. When the single accelerator pedal 15 is used, a governor for controlling the rotation speed of the engine E is interlocked with the accelerator pedal 15, and an operation position detecting means for controlling the rotation speed of the assist motor M is provided. .. When the accelerator pedal 15 for the assist motor M and the accelerator pedal 15 for the engine E are separately provided, the governor is interlocked with the accelerator pedal 15 for the engine E, and the accelerator pedal 15 for the assist motor M is provided. Is provided with an operation position detecting means.

[Other Embodiment 1]
In the above embodiment, the engine E provided with a gasoline engine is shown, but the present invention is not limited to this, and may be diesel specifications including a diesel engine, for example.
Other configurations may be the same as those of the above-described embodiment.

[Other embodiment 2]
In the above embodiment, the slide movement mechanism 7 is exemplified by the single elongated hole 70 and the guide member by the single connecting bolt 71, but the structure is not limited to this.
For example, the motor mounting frame 6B may be slid by using a plurality of elongated holes 70 arranged in parallel with each other and a plurality of connecting bolts 71 inserted into the plurality of elongated holes 70. ..
Further, the guide member is not limited to the connecting bolt 71, but may be any structure such as a pin or a roller that can guide the motor mounting frame 6B in a state of being inserted into the elongated hole 70.
Other configurations may be the same as those of the above-described embodiment.

[Other Embodiment 3]
In the above embodiment, the structure in which the elongated hole 70 in the slide movement mechanism 7 is formed in the movable side motor mounting frame 6B is illustrated, but the invention is not limited to this, and the elongated hole 70 may be formed in the fixed side extension frame. It may have a structure formed in the portion 6A.
Other configurations may be the same as those of the above-described embodiment.

The present invention is not limited to utility vehicles, but can be applied to various work vehicles such as lawnmowers and transport vehicles.

4 CVT transmission device 6 motor support base 6A extension frame part 6B motor mounting frame 7 slide moving mechanism 40 drive shaft 50 output shaft 70 long hole 71 guide member E engine M assist motor

Claims (3)

A CVT transmission device, to which the driving force from the engine is transmitted, is arranged on the lateral side of the engine,
An assist motor is arranged on the lateral outer side of the CVT transmission opposite to the side where the engine is present.
The output shaft of the assist motor is located coaxially with the drive shaft of the CVT transmission device, and the drive shaft and the output shaft are configured to be interlockable and connectable.
A motor support base that supports the assist motor is extended toward the lateral outside of the machine from the location where the CVT transmission is present,
The motor support base is provided with a slide movement mechanism capable of moving the mounting position of the assist motor with respect to the CVT transmission device in the perspective direction along the axis of the drive shaft of the CVT transmission device.
The slide movement mechanism attaches the assist motor to the CVT transmission over a position where the drive shaft and the output shaft can be connected and a position where the connection between the drive shaft and the output shaft is released. A work vehicle whose position can be changed. The motor support base includes an extension frame portion extending laterally outward of the CVT transmission device and a extension frame portion of the vehicle body frame to which the engine and the CVT transmission device are attached. With a motor mounting frame mounted so as to be relatively movable,
The slide movement mechanism is provided between the extension frame portion and the motor mounting frame,
The work vehicle according to claim 1, wherein the assist motor is mounted on the motor mounting frame. In the slide movement mechanism, a long hole having a long diameter in a direction along the axis of the drive shaft of the CVT transmission is formed in either one of the extension frame portion and the motor mounting frame. The work vehicle according to claim 2, wherein the guide member engaged with and guided by is formed on the other one of the extending frame portion and the motor mounting frame.

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