JP2011011677A - Multipurpose truck - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve workability of a multipurpose truck, in which an engine as well as a driver's cabin 5 having seats 7 and 8 are provided to a traveling frame 4 supported by front wheels 2 and rear wheels 3, and a loading platform 6 on which loads are placed is provided on the traveling frame.SOLUTION: The seats 7 and 8 in the driver's cabin 5 is located at a position forward from a rear surface 10 of the cabin 5 by an appropriate distance L so that a space 11 is formed between the seats and the rear surface 10 in the driver's cabin 5. Therefore, various work gears and tools can be loaded into the space 11.

Description

  The present invention relates to a transport vehicle used for various purposes such as feed transportation, farm work, site management, and the like. More specifically, an engine as a travel power source is provided on a travel frame supported by front and rear wheels. The present invention relates to a transport vehicle that is equipped with a loading platform and an operation cabin on which the object to be transported is mounted.

  In Patent Document 1 as a prior art, an engine as a traveling power source is mounted on a traveling frame supported by front wheels and rear wheels, and a driving cabin having a steering handle and a seat, and an object to be transported are mounted. A multipurpose transport vehicle having a structure including a load carrier is described.

JP 2008-094179 A

  However, in the multipurpose transport vehicle described in Patent Document 1, it is necessary to load various work tools such as a scoop or a basket, various work tools, or work clothes. In the multi-purpose transport vehicle described in Patent Document 1, these work tools, tools, work clothes, etc. cannot be loaded into the driving cabin but must be loaded into the loading platform. 、 There was a problem that it often disappeared and fouled by jumping out from the loading platform.

  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
“An engine as a driving power source is mounted on a traveling frame supported by the front wheels and the rear wheels, a driving cabin having a steering handle and a seat is provided, and a loading platform for placing a load on the traveling frame portion. In a multi-purpose transport vehicle comprising
The seat in the driving cabin is positioned at a position ahead of the rear surface of the driving cabin by an appropriate size so as to form a space between the seat and the rear surface of the driving cabin. "
It is characterized by that.

Claim 2
“In the first aspect of the present invention, both ends of the space portion are opened to the left and right of the operation cabin, and doors that can be opened and closed are provided in the openings.”
It is characterized by that.

Claim 3
“In Claim 1 or 2, the backrest portion of the seat overlaps above the space portion.”
It is characterized by that.

  According to claim 1, since a space portion is formed in the rear portion of the seat in the driving cabin, various work tools such as a scoop or a hoe or various work tools are formed in the space portion. Or work clothes etc. can be loaded in the state which does not pollute these.

  In addition, since a relatively small load can be loaded into the space, the workability of the multipurpose transport vehicle can be greatly improved.

  In addition, according to the second aspect, it is possible to prevent the various working tools and the like loaded in the space from falling or disappearing during traveling.

  Furthermore, according to the third aspect, there is an advantage that the size in the front-rear direction of the driving cabin can be reduced by the amount that the backrest portion of the seat overlaps above the space portion.

It is a side view which shows the transport vehicle by embodiment of this invention. It is a partially cutaway top view of the transport vehicle. It is a perspective view when the said transport vehicle is seen from diagonally upward from the front. It is a principal part enlarged view of FIG. FIG. 5 is a VV sectional view of FIG. 4. It is a vertical front view of the continuously variable transmission mechanism provided with the automatic clutch. It is a figure which shows the modification of FIG. It is a figure which shows another modification of FIG.

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

  The multi-purpose transport vehicle 1 in this embodiment has a traveling frame 4 supported by a pair of left and right front wheels 2 and a pair of left and right rear wheels 3. The traveling frame 4 includes both the front wheels 2 and both the front wheels 2. A driving cabin 5 is provided at a position between the rear wheel 3 and a loading platform 6 for placing an object to be transported at a position behind the driving cabin 5.

  As shown in FIGS. 1 to 3, the driving cabin 5 is configured in an enclosure frame shape in any of a side view, a front view, and a plan view. An assistant seat 8 is provided side by side, and steering is performed by simultaneously rotating the front wheels 2 in the left-right direction in front of the driver seat 7 by a steering mechanism (not shown). A round steering handle 9 is provided.

  The both seats 7 and 8 are positioned appropriately in front of the rear membrane plate 10 constituting the rear surface of the driving cabin 5 by an appropriate dimension L. In the middle, the space portion 11 is formed such that the left and right sides of the space portion 11 are open to the left and right sides of the driving cabin 5.

  In this case, the backrest portion 7 a of the driver seat 7 and the backrest portion 8 a of the assistant seat 8 overlap above the space portion 11. In addition, these backrest parts 7a and 8a can be tilted forward and rotated.

  In addition, on the outer side surface (left side surface) of the driver's seat 7, a hip-guard door stopper 12 configured in a downward U-shape is provided on the outer side surface (right side surface) of the assistant seat 8. Each portion is provided with a door stopper 13 that also serves as a hip guard and has a downward U-shape.

  Furthermore, a door 14 configured to be openable and closable outwardly is provided on the left side portion of the space portion 11, and a door 15 configured to be openable and closable outwardly is provided on the right side portion of the space portion 11. By opening or closing one or both of these doors 14 and 15, various working tools such as bags or various repair tools, work clothes, etc. are put in the space 11 It is configured to be able to keep.

  The traveling frame 4 includes a pair of left and right upper frames 16 extending rearward and a pair of left and right lower frames 17 extending rearward in the rear portion of the driving cabin 5.

  Between the lower frames 17 of the upper and lower frames 16 and 17, an engine 18 as a power source for traveling and a rear wheel gear case 19 are arranged. A case 19 is provided so as to be positioned on the rear side, and the power of the engine 18 is applied to the rear wheel via a continuously variable transmission mechanism 21 such as a belt type equipped with an automatic clutch 20 such as a centrifugal type. The rear wheel 3 is driven and rotated by the rear wheel gear case 13 so that the transport vehicle 1 moves forward or backward.

  A brake pedal 22 for each of the wheels 2 and 3 and an accelerator pedal for adjusting and controlling the number of revolutions of the engine 18 are provided on a portion of the floor surface of the driving cabin 5 in front of the driver seat 7. 23 are arranged side by side.

  As is well known in the art, the automatic clutch 20 is in a state where power transmission to the engine 18 is OFF when the rotational speed of the engine 18 is low. The power transmission is turned on when the rotational speed 18 exceeds a predetermined rotational speed N1.

  That is, when the accelerator pedal 23 is not depressed, the transport vehicle 1 does not travel forward because the rotational speed of the engine 18 is low and the automatic clutch 20 is turned off.

  When the rotational speed of the engine 18 exceeds a predetermined rotational speed (N1) by depressing the accelerator pedal 23, the automatic clutch 20 is turned on, and the transport vehicle 1 starts traveling forward. .

  As is well known in the art, the belt-type continuously variable transmission mechanism 21 automatically changes the rotational speed of both rear wheels 3 relative to the rotational speed of the engine 18 in proportion to the rotational speed of the engine 18. This is a configuration in which a shift operation is automatically performed so as to increase the speed.

  That is, the automatic clutch 20 and the continuously variable transmission mechanism 21 are specifically configured as shown in FIG.

  That is, the output shaft 18a of the engine 18 is provided with a main pulley 21a composed of a fixed pulley piece 21a 'that does not slide in the axial direction and a movable pulley piece 21a "that freely slides in the axial direction. The pulley piece 21a ″ is urged by the spring 21b in a direction away from the fixed pulley piece 21a ′, while the input shaft 19a to the rear wheel gear case 19 has a fixed pulley piece 21c ′ that does not slide in the axial direction. , A driven pulley 21c composed of a movable pulley piece 21c ″ that freely slides in the axial direction is provided, and the movable pulley piece 21c ″ is urged to be pressed against the fixed pulley piece 21c ′ by a spring 21d. Thus, an endless belt 21e is wound between the main pulley 21a and the driven pulley 21c.

  The output shaft 18a of the engine 18 is provided with a governor mechanism 20a between the main pulley 21a and the movable pulley piece 21a ″. When the engine 18 has a slow rotation speed in the idle ring region, the main pulley Since the movable pulley piece 21a ″ in 21a is separated from the fixed pulley piece 21a ′ by the spring 21b, the power transmission to the rear wheel gear case 19 is turned off, but the rotational speed of the engine 18 is When the predetermined number of rotations (N1) is reached by the depression operation of the accelerator pedal 23, the movable pulley piece 21a "moves forward against the spring 21b toward the fixed pulley piece 21a ', and the endless belt 21e therebetween is moved. Therefore, the power transmission to the rear wheel gear case 19 is turned on.

  When the rotational speed of the engine 18 becomes higher by the depression operation of the accelerator pedal 23, the rotational speed of the rear wheel gear case 19 and, consequently, the rotational speed of the rear wheel 3 are changed to the rotational speed of the engine 18. Shift operation is automatically performed so that the speed is automatically increased in proportion.

  On the other hand, a lifting roller 24 is rotatably provided on the upper surface of the rear end portion of the upper frame 16 among the upper and lower frames 16, 17, and the loading platform 6 can be freely moved in the front-rear direction. It is supported so that it can move to.

  In this case, the lifting roller 24 is fitted in a guide rail 25 provided on the lower surface of the cargo bed 6 so as to extend in the front-rear direction, thereby moving the cargo bed 6 in the front-rear direction without shifting in the left-right direction. The guide is only moved linearly.

  It should be noted that support rollers 26 that fit on the guide rails 25 on the lower surface of the loading platform 6 are provided on the upper surfaces of the upper frames 16 so as to support the loading platform 6 in a substantially horizontal state. .

  And between the rear ends of the lower frames 17, a rotatable elevating shaft 27 is mounted, and a lower end (base end) of the elevating link 28 is fixed to the elevating shaft 27, and the elevating link is fixed. A hydraulic cylinder in which the upper end of 28 is pivotally attached to a rear end portion of the lower surface of the loading platform 6 by a pin 29 and the elevating link 28 is provided between the elevating link 28 and the lower frame 17. At 30, it is configured to be driven and rotated in the front-rear direction.

  As shown in FIG. 5, the elevating link 28 connects two links to a cross beam, or connects two links to an X-type as shown by a two-dot chain line in FIG. Therefore, the structure has high rigidity.

  Further, as shown in FIG. 4, the upper frame 16 is provided with a lock mechanism 31 configured to be switchable between a state in which the loading platform 6 is locked so as not to move and a state in which the lock is released.

  The lock mechanism 31 includes a flange 33 pivotally attached to the upper frame 16 by a pin 32, and an engagement piece 34 fixed to the lower surface of the cargo bed 6, and the flange 33 has a lower end thereof. A spring 35 provided between the upper frame 16 and the upper frame 16 is always engaged with the engagement piece 34, that is, in a locked state. The locked state is released by rotating against a spring 35 via a wire 36 by operating a provided lever (not shown).

  In this configuration, the lift link 28 is rotated backward by the hydraulic cylinder 30 after the lock state by the lock mechanism 31 is released.

  Then, the loading platform 6 is automatically pulled rearward so that the rear end of the loading platform 6 is lowered downward while being supported by the lifting roller 24 while being pulled backward by the lifting link 28 and being moved rearward. Inclined to.

  That is, the loading platform 6 is tilted so that the rear end thereof is lowered from the horizontal position with the lifting roller 24 as a fulcrum, and is lowered so that the rear end approaches the ground as shown by a two-dot chain line in FIG. Therefore, it is possible to easily load the object to be loaded onto the loading platform 6 and unload it from the loading platform 6 with the height from the ground lowered.

  Further, by rotating the elevating link 28 in the reverse direction, that is, in the forward direction by the hydraulic cylinder 30, the loading platform 6 is raised from the rear inclined state with the elevating roller 24 as a fulcrum while being raised. The horizontal position is returned to the original position supported by the lifting roller 24 and the supporting roller 26.

  Therefore, by making the lock mechanism 31 in the locked state, the cargo bed 6 is fixed to the traveling frame 4 so as not to be lifted or displaced laterally. Can do.

  In the above embodiment, the forward / backward driving rotation by the power of the lift link 28 is performed by the hydraulic cylinder 30, but instead of the hydraulic cylinder 30, it is performed by a pneumatic cylinder. The elevating shaft 27 at the lower end (base end) of the elevating link 28 is driven and rotated in the reverse direction by a hydraulic or electric motor, or is driven and rotated in the reverse direction by power transmission from the engine 18. Thus, the elevating link 28 may be configured to be driven and rotated in the front-rear direction.

  Moreover, although the said embodiment was the case where raising / lowering the said loading platform 6 tilted backward was performed by the drive rotation to the front-back direction in the said raising / lowering link 28, this invention is not restricted to this. First, instead of the forward / backward rotation of the lifting / lowering link 28, the lifting / lowering movement while tilting backward in the loading platform 6 is driven by rotating either one or both of the lifting / lowering rollers 24 in the forward / reverse direction. Can be done.

  In this case, in order to drive and rotate either one or both of the lifting / lowering rollers 24, as shown in FIG. 7, a hydraulic or electric motor 37 provided for the lifting / lowering roller 24 is used. As shown in FIG. 8, it is possible to employ a configuration in which power is transmitted from the engine 18 via a power transmission mechanism 38.

  When the lifting / lowering movement of the loading platform 6 is performed by forward / reverse rotation of the lifting / lowering roller 24, the lifting / lowering roller 24 contacts the lifting / lowering roller 24 of the loading platform 6. The portion is preferably configured to have a large friction so that no slip occurs between them, or a rack and pinion configuration including a small-diameter pinion gear and a linear rack gear.

DESCRIPTION OF SYMBOLS 1 Transport vehicle 2 Front wheel 3 Rear wheel 4 Traveling frame 5 Driving | running cabin 7, 8 Seat 6 Loading platform 10 Back membrane board of driving | cabin 11 Space part 16 Upper frame 17 Lower frame 18 Engine 24 Lifting roller 26 Supporting roller 27 Lifting shaft 28 Lifting link 30 Hydraulic cylinder

Claims (3)

The traveling frame supported by the front wheels and the rear wheels is equipped with an engine as a traveling power source, a driving cabin having a steering handle and a seat is provided, and a loading platform for loading luggage is provided on the traveling frame. In a multi-purpose transport vehicle consisting of
The seat in the driving cabin is located at a front part of the driving cabin by an appropriate size so as to form a space between the seat and the rear surface in the driving cabin. Multipurpose transporter.   2. The multipurpose transport vehicle according to claim 1, wherein both ends of the space portion are opened to the left and right of the driving cabin, and doors that can be opened and closed are provided in the opening portions.   The multipurpose transport vehicle according to claim 1 or 2, wherein a backrest portion of the seat overlaps the space portion.

Images