JP2010115989A - Multipurpose conveyance vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve reduction of size and weight, and lowering of the gravity center in a multipurpose conveyance vehicle in which an engine 12 is mounted on a traveling frame 4 supported by front wheels 2 and rear wheels 3 on the right and left, and which comprises an operation cabin 8 provided with a steering handle 10 and a seat 9, and a loading platform 27. <P>SOLUTION: The traveling frame is composed by a main frame 5 formed in a rectangular enclosure frame in a plane view and disposed between the front wheels and the rear wheels, a front frame 6 projecting forward from the main frame to between both front wheels to support the engine and both the front wheels, and a rear frame 7 projecting rearward from the main frame to between both rear wheels to support both the rear wheels and the loading platform. The operation cabin 8 is provided on the upper face of the main frame 5, and the engine is transversely placed on the front frame to make a crankshaft arranged in a transverse direction. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a transport vehicle used for various purposes such as feed transportation or farm work, and more specifically, an engine as a power source is mounted on a traveling frame supported by front and rear wheels, The present invention relates to a transport vehicle provided with a loading platform on which a transported object is placed and an operation cabin.

In Patent Document 1 as a prior art, an engine as a power source is mounted on a traveling frame supported by left and right front wheels and rear wheels, a driving cabin having a steering handle and a driving seat, and a transported object. A multi-purpose transport vehicle is described which comprises a loading platform for loading.
JP 2008-094179 A

  However, in the multipurpose transport vehicle described in Patent Document 1, the engine is disposed in the front part of the driving cabin and the loading platform is disposed in the rear part of the driving cabin. Since the portion where the cabin is provided and the portion where the engine is provided are configured in a common frame extending in the front-rear horizontal direction, if the ground height to the engine is set so that the engine does not contact the ground, Since the ground level to the floor of the driving cabin becomes high, it is difficult to get on and off the driving cabin, and there is a problem that the center of gravity of the entire transport vehicle becomes high and the running stability is lowered.

  In addition, since the engine disposed in the front portion of the operating cabin is placed vertically so that its crankshaft is parallel to the traveling direction, the size of the engine in the length direction increases. Therefore, when the total length of the transport vehicle is determined in advance, the length of the loading platform must be shortened by the length of the engine, and the length of the loading platform must be determined in advance. In other words, the entire length of the transport vehicle was increased by the length of the engine.

  It is a technical object of the present invention to provide a multipurpose vehicle that solves these problems.

In order to achieve this technical problem, claim 1
“In a multi-purpose transport vehicle that has an engine mounted on a traveling frame supported by the left and right front wheels and rear wheels, a driving cabin having a steering handle and a seat, and a loading platform on which to carry a load,
The traveling frame is configured as a rectangular frame in plan view and is disposed between the front wheel and the rear wheel, and projects forward between the front wheel and the front wheel from the main frame. A front frame that supports both front wheels, and a rear frame that protrudes rearward from the main frame between the rear wheels and supports the rear wheels and the loading platform. While being provided on the upper surface, the engine is placed horizontally on the front frame so that its crankshaft is oriented sideways. "
It is characterized by that.

Claim 2
“In the first aspect of the present invention, the front frame includes a pair of left and right front members, and the engine and the front wheels are supported by a pair of left and right front members of the front frame.”
It is characterized by that.

Claim 3
“In the first or second aspect of the invention, the rear frame includes a pair of left and right rear members, and the loading platform and the rear wheels are supported by the pair of left and right rear members of the rear frame.
It is characterized by that.

Claim 4
“In any one of claims 1 to 3, the engine is slanted so that the cylinder bore axis of the engine is inclined forward when viewed from the direction of the crankshaft.”
It is characterized by that.

  According to the first aspect of the present invention, a traveling frame is configured as a rectangular frame in a plan view and disposed between the front wheel and the rear wheel, and a front frame extends from the main frame to the front wheels. And a rear frame that supports the engine and the front wheels, and a rear frame that protrudes rearward from the main frame between the rear wheels and supports the rear wheels and the cargo bed. The lateral width of the main frame, and hence the lateral width of the operating cabin provided on the upper surface of the main frame, can be configured to be wide in a light weight state.

  On the other hand, since the upper surface of the main frame, and hence the floor surface of the driving cabin, can be lowered regardless of the height from the ground on the front frame that supports the engine, it is easy to get on and off the driving cabin. At the same time, the center of gravity of the transport vehicle can be lowered to improve the running stability.

  In addition, because the engine is placed horizontally, the dimension that the engine occupies in the longitudinal direction can be made shorter than in the prior art, so when the total length of the transport vehicle is predetermined, The length can be increased as long as the engine is placed horizontally, and the total length of the carrier can be shortened as long as the engine is placed horizontally because the longitudinal length of the loading platform is predetermined.

  In this case, according to claim 2, the engine and both front wheels can be reliably supported with a simple structure.

  According to the third aspect of the present invention, the cargo bed and both rear wheels can be reliably supported with a simple structure.

  Furthermore, according to the fourth aspect of the present invention, the ground height to the top surface of the engine is lowered by the slant forward of the engine, so that the field of view when looking forward from the driving cabin is widened. Therefore, driving maneuverability can be further improved.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

  The multipurpose transport vehicle 1 in this embodiment has a traveling frame 4 supported by a pair of left and right front wheels 2a and 2b and a pair of left and right rear wheels 3a and 3b.

  The traveling frame 4 includes a main frame 5 positioned between the front wheels 2a and 2b and the rear wheels 3a and 3b, a front frame 6 protruding forward from the front end of the main frame 5, and the main frame 5 And a rear frame 7 protruding rearward from the rear end.

  The main frame 5 includes at least a front lateral member 5a disposed laterally extending behind the front wheels 2a and 2b and a lateral direction extending frontward of the rear wheels 3a and 3b. The rear lateral member 5b disposed, the right vertical member 5c extending in the front-rear direction of the traveling frame 4 and integrally connecting the right ends of the front lateral member 5a and the rear lateral member 5b, and the traveling frame 4 A left vertical member 5d that extends in the front-rear direction and integrally connects the left ends of the front horizontal member 5a and the rear horizontal member 5b is formed as a surrounding frame in plan view (FIG. 2).

  An operation cabin 8 is provided on the upper surface of the main frame 5.

  The operating cabin 8 includes side frames 8a and 8b which are erected in a gate shape in a side view (FIG. 1) on both the left and right sides of the upper surface of the main frame 5, and an upper surface between the side frames 8a and 8b. And a windshield 8d provided on the front surface between the side frames 8a and 8b.

  In the driving cabin 8, at least three seats 9 are provided side by side and a round steering handle 10 is provided.

  Each of the seats 9 is configured to be movable and adjustable in the front-rear direction, and the backrest of each seat 9 is configured to be adjustable in inclination in the front-rear direction.

  As shown in FIGS. 2 and 6, the front frame 6 includes a pair of left and right front members 6a and 6b extending in the front-rear direction between the front wheels 2a and 2b.

  Each of the front wheels 2a and 2b is connected to the front members 6a and 6b of the front frame 6 by independent suspensions 11a such as a double wishbone type, a dual link type or a MacPherson strut type which are well known in the art. , 11b so as to move up and down elastically freely.

  Moreover, both the front wheels 2a and 2b are configured to turn and turn simultaneously to the left and right via a steering gear and a steering mechanism (not shown) by turning the steering handle 10. 1 is turned right and left.

  As shown in FIGS. 2 and 6, an engine (multi-cylinder diesel engine) 12 as a power source is mounted on the upper surface of the front frame 6 so that its crankshaft 12 a faces sideways. Yes.

  As shown in FIGS. 1 and 5, the engine 12 is slanted so that the cylinder bore axis 12b of the engine 12 is inclined forward by an appropriate angle θ as seen from the direction of the crank axis 12a. 6 are attached to both front members 6a and 6b.

  The engine 12 has its exhaust system part 12c facing forward and its intake system part 12d facing backward, so that the traveling wind during forward travel blows against the exhaust system part 12c, and the exhaust system part It is configured to promote the cooling of 12c.

  A traveling mission case 13 is mounted horizontally on the upper surface of the front frame 6 between the driving cabin 8 and the engine 12 so that the input shaft 13a faces sideways. The traveling mission case 13 is attached to both front members 6 a and 6 b in the front frame 6 in the same manner as the engine 12.

  The output of the engine 12 is transmitted to the traveling mission case 13 via a power transmission mechanism 14 such as a chain mounted between the output shaft 12e and the input shaft 13a of the traveling mission case 13, and this traveling mission. After being appropriately shifted in the case 13, it is transmitted to the front wheels 2a, 2b via the front wheel axles 15a, 15b extending laterally from the left and right sides of the traveling mission case 13, and the rear wheels 3a, 3b. To the rear surface of the driving cabin 8 so as to extend in the front-rear direction, and the axle suspension device 17 (to be described later) for both rear wheels 3, thereby transmitting the vehicle. The vehicle 1 travels forward or backward by the engine 12.

  In addition to the steering handle 10 and the seat 9, the driving cabin 8 is provided with speed change operation means for shifting the travel mission case 13, and the brake pedal 18 and the engine 12 are rotated. An accelerator pedal 19 for controlling the number and a key switch 20 for the engine 12 are provided.

  In the engine 12, a radiator 21 for cooling the engine 12 and a fan 22 for ventilating the radiator 21 are disposed on the opposite side of the output shaft 12 e, while the traveling transmission case 13 A fuel tank 23 and a battery 24 for the engine 12 are arranged side by side in the horizontal direction. The ventilation fan 22 is configured to be driven to rotate by the engine 12 or to be driven to rotate by an electric motor.

  In this case, the fuel tank 23 is located in a portion between the engine 12 and the radiator 21 in a plan view (FIG. 2), and travels through the portion between the engine 12 and the radiator 21 rearward. The wind hits the fuel tank 23 and cools it.

  A bonnet cover 25 is provided on the upper surface of the front frame 6 so as to cover the engine 12, the traveling mission case 13, the fuel tank 23, the battery 24 and the like so as to be openable and closable. Fender covers 26a and 26b are provided for the front wheels 2a and 2b.

  On the other hand, on the upper surface of the rear frame 7 projecting rearward from the main frame 5 of the traveling frame 4, a loading platform 27 for placing a cargo to be transported is arranged horizontally or substantially horizontally.

  Like the front frame 6, the rear frame 7 includes a pair of left and right rear members 7a and 7b extending in the front-rear direction between the rear wheels 3a and 3b, as shown in FIG. Each of the rear wheels 3a and 3b moves up and down elastically and freely with respect to the rear members 7a and 7b of the rear frame 7 via an axle suspension device 17 that is well known in the art. Installed.

  Both rear members 7a and 7b in the rear frame 7 have a groove-shaped rail configuration with a U-shaped cross section, and a load carrier 27 disposed on the upper surface of the rear frame 7 has a plurality of lower surfaces. The roller 28 is supported by the rear frame 7 so as to be freely movable rearward by fitting the roller 28 to the rear members 7a and 7b.

  Moreover, the loading platform 27 is configured to reciprocate in the front-rear direction by a pair of left and right return hydraulic cylinders 29 mounted between the loading platform 27 and the main frame 5.

  In this case, the rear frame 7 has a rear end portion that is curved so as to incline downward in a side view (FIG. 1), so that the loading platform 27 is moved rearward by the hydraulic cylinder 29. In this case, the loading platform 27 falls down or tilts from the horizontal state along the curved rear frame 7 as shown by a two-dot chain line in FIG. 1 to facilitate loading and unloading. It is configured to be able to.

  Further, fender covers 30a and 30b are also provided for the rear wheels 3a and 3b.

  A stopper 31 is provided at the rear end of the rear frame 7 so that the loading platform 27 comes into contact with the rear end of the rear frame 7 and prevents further movement.

  As described above, the traveling frame 4 is configured as a rectangular frame in plan view and is disposed between the front wheels 2a, 2b and the rear wheels 3a, 3b, and the main frame 5 The front frame 6 projecting forward between the front wheels 2a and 2b and the rear frame 7 projecting rearward from the main frame 5 between the rear wheels 3a and 3b. The width W in the frame 5 and, in turn, the width dimension in the operation cabin 8 provided on the upper surface of the main frame 5 can be configured to be wide.

  On the other hand, the upper surface of the main frame 5 and hence the floor surface of the operation cabin 8 can be lowered regardless of the height from the ground on the front frame 6 that supports the engine 12 and the traveling mission case 13. .

  In addition, since the engine 12 is placed horizontally, the dimension occupied by the engine 12 in the length direction can be shortened by the amount of the engine 12 placed horizontally, so that the overall length of the transport vehicle 1 is determined in advance. In some cases, the longitudinal length of the loading platform 27 can be increased by the amount of the engine 12 placed horizontally, and the longitudinal length of the loading platform 27 is determined in advance. It can be shortened as long as 12 is placed horizontally.

  Moreover, the traveling mission case 13 is disposed so as to be supported by the front frame 6 at a portion between the engine 12 and the operating cabin 8, while the loading platform 27 is rearward from the main frame 5. By supporting with the protruding rear frame 7, the ground height of the loading platform 27 can be lowered by the amount that the traveling mission case is not disposed below the loading platform 27. Combined with the fact that the surface height of the surface can be lowered, the center of gravity of the entire transport vehicle 1 can be lowered, and the running stability can be improved.

  The engine 12, the front wheels 2a and 2b, and the traveling mission case 13 are supported by a pair of left and right front members 6a and 6b that constitute the front frame 6, so that the support is simplified. Can be strong.

  Similarly, since the loading platform 27 and the rear wheels 3a and 3b are supported by a pair of left and right rear members 7a and 7b constituting the rear frame 7, these supports can be strengthened with a simple structure. it can.

  Furthermore, the engine 12 is slanted so that the cylinder bore axis 12b of the engine 12 is inclined forward by an appropriate angle θ as viewed from the direction of the crank axis 12a. Since the height is reduced, the field of view when looking forward from the driving cabin 8 is widened, and in addition, the space between the engine and the driving cabin is widened, so that the capacity of the fuel tank 23 can be increased. it can.

  In the above-described embodiment, the engine 12 is configured to be four-wheel drive such that both the front wheels 2a and 2b and both the rear wheels 3a and 3b are rotationally driven. Not limited to this, it can be configured as a front drive such that only both front wheels 2a and 2b are rotationally driven, or can be configured as a rear drive such that only both rear wheels 3a and 3b are rotationally driven.

It is a side view which shows the transport vehicle of embodiment. It is a top view of FIG. FIG. 3 is a sectional view taken along line III-III in FIG. 1. FIG. 4 is a sectional view taken along line IV-IV in FIG. 1. It is a principal part enlarged view of FIG. FIG. 6 is a plan view of FIG. 5.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Transport vehicle 2 Front wheel 3 Rear wheel 4 Traveling frame 5 Main frame 5a Front side horizontal member 5b Rear side horizontal member 5c, 5d Left and right vertical member 6 Front frame 6a, 6b Front member 7 Rear frame 7a, 7b Rear member 8 Driving cabin 9 Seat DESCRIPTION OF SYMBOLS 10 Steering handle 12 Engine 12a Crankshaft of engine 12b Cylinder axis of engine 13 Traveling mission case 15a, 15b Axle for front wheel 16 Axle for rear wheel 23 Fuel tank

Claims (4)

In a multi-purpose transport vehicle, in which an engine is mounted on a traveling frame supported by left and right front wheels and rear wheels, and a driving cabin having a steering handle and a seat and a loading platform for placing a work to be carried are provided.
The traveling frame is configured as a rectangular frame in plan view and is disposed between the front wheel and the rear wheel, and projects forward between the front wheel and the front wheel from the main frame. A front frame that supports both front wheels, and a rear frame that protrudes rearward from the main frame between the rear wheels and supports the rear wheels and the loading platform. The multi-purpose transport vehicle according to claim 1, wherein the engine is installed horizontally on the front frame so that a crankshaft thereof is turned sideways.   2. The multipurpose apparatus according to claim 1, wherein the front frame includes a pair of left and right front members, and the engine and the front wheels are supported by a pair of left and right front members of the front frame. Truck.   3. The rear frame according to claim 1, wherein the rear frame includes a pair of left and right rear members, and the loading platform and the two rear wheels are supported by a pair of left and right rear members of the rear frame. Multipurpose transport vehicle.   The multipurpose transport vehicle according to any one of claims 1 to 3, wherein the engine is slanted so that a cylinder bore axis of the engine is inclined forward when viewed from the direction of the crankshaft. .