JP3773424B2 - Working vehicle structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure of a driving unit in a work vehicle such as an agricultural tractor or a riding lawn mower.
[0002]
[Prior art]
Some work vehicles, such as agricultural tractors, include an engine at the front of the machine body, a fuel tank disposed at the rear of the engine, and an operating unit at the rear of the fuel tank.
In this case, a resin cover that covers the rear side of the fuel tank and extends to the floor of the operation unit is provided, and an instrument unit is provided on the upper part of the cover. For the driver who sits on the driver's seat located behind the fuel tank in the driver, the cover is equipped with the instrument part at the upper part and is arranged in the front. (The cover is made of resin, so that it is easy to configure the cover as a cosmetic cover).
[0003]
[Problems to be solved by the invention]
In the work vehicle as described above, it has been proposed to include a cabin that covers the driving unit. When the cabin that covers the operating part is provided in this way, if the engine sound enters the cabin, the engine sound will be trapped inside the cabin. It is necessary to configure so that it can be prevented.
According to the present invention, when a work vehicle having a cabin and a work vehicle having no cabin are produced in the operation unit structure of the work vehicle, a structure for preventing the engine sound from entering the cabin is appropriately provided. The purpose is to be able to obtain.
[0004]
[Means for Solving the Problems]
According to the first aspect of the present invention, there is provided a driving unit structure for a work vehicle including an engine at a front portion of a fuselage, a fuel tank disposed at a rear side of the engine, and a driving unit configured at a rear side of the fuel tank. The cabin is connected to the fuselage, and the cabin is provided with an inverted U-shaped arch-shaped frame at the front left and right center, and a fuel tank is arranged over the front and rear inside the arch-shaped frame. In a state of being positioned rightward, a side-view inverted L-shaped frame is connected to the arch-shaped frame, covers the upper and rear sides of the inverted L-shaped frame, and projects to the cabin side from the upper and left sides of the fuel tank. covering a first cover made of a resin having a meter unit at the top in what is extended to the floor of the operating portion covering the lateral side and the rear, upper and rear of the inverted L-shaped frame, and, butt the cabin side Rutotomoni includes an upper fuel tank left and right lateral side and a metallic second cover disposed between the rear side cover to the floor of the driver portion and the first cover in what is extended to the inverted L-shaped frame The second cover is connected to the arched frame.
[0005]
According to the features of the first aspect, in the case of a type of work vehicle having a cabin, the first and second covers are provided, and the cabin is provided that covers the operating portion while covering the first and second covers. With this configuration, the engine sound reaches the second cover from the fuel tank, and then reaches the first cover and tries to enter the cabin.
According to the first aspect of the present invention, the engine sound first reaches the second cover from the fuel tank. However, since the second cover is made of heavy metal, the engine sound is likely to be blocked by the second cover (generally, the weight is reduced). Depending on the point of sound insulation effect. Since the first cover is disposed on the outer side (cabin side) of the second cover, even if engine sound passes through the second cover, it is easily blocked by the first cover.
[0006]
According to the features of the first aspect, since the first cover is made of resin, the first cover can be easily formed into an arbitrary shape suitable for the operating portion (the first cover is made of resin. This makes it easy to configure the first cover as a cosmetic cover). In this case, the second cover is made of metal and is difficult to use as a cosmetic cover, but the second cover is hidden inside the first cover so that the second cover is used for cosmetic purposes. There is no need to configure the cover.
[0007]
According to the first aspect of the present invention, in the case of a type of work vehicle that does not include a cabin, the first cover may be used and the second cover may not be used. In a type of work vehicle that does not have a cabin, the engine sound is diffused and there is no such thing as an engine sound being trapped in the vicinity of the driving unit, so there is no need to provide a second cover. Since the resin-made first cover is used similarly to the type of work vehicle provided with the cabin, the first cover can be easily configured as a cosmetic cover.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
As shown in FIG. 1, an engine 3 is provided at the front of the aircraft supported by the right and left front wheels 1 and the right and left rear wheels 2, and a mission case 4 and a driving unit 5 (driving) are installed at the rear of the aircraft. An agricultural tractor, which is an example of a work vehicle, is provided with a seat 7). As shown in FIGS. 3 and 4, the engine 3 is disposed in the front part of the airframe, and the clutch housing 18 is connected to the rear part of the engine 3. The base portion of the arch-shaped support frame 46 in front view is connected to the right and left lateral sides of the clutch housing 18.
[0009]
As shown in FIGS. 3 and 4, a resin fuel tank 24 is provided, the upper part of the fuel tank 24 is connected to the support frame 46, and the lower part of the fuel tank 24 is connected to the bracket 46 a of the support frame 46. Yes. As shown in FIG. 3, in a side view, the front half of the fuel tank 24 passes through the support frame 46 and enters the front side (the engine 3 side), and the rear half of the fuel tank 24 passes through the support frame 46 and passes the rear side ( The driving section 5 side). A metal partition wall 25 that partitions the engine 3 side and the fuel tank 24 is connected to the support frame 46. As shown in FIGS. 1 and 3, a bonnet 26 that covers the engine 3 is provided, and the bonnet 26 is supported around the horizontal axis P <b> 3 at the top of the support frame 46 so as to be freely opened and closed.
[0010]
As shown in FIGS. 1 and 2, the cabin 8 includes right and left front vertical frames 10, right and left middle vertical frames 12, right and left rear vertical frames 13, and upper ends of right and left front vertical frames 10. First horizontal frame 14 connected by welding over the upper part, upper ends of right and left front vertical frames 10, upper ends of right and left middle vertical frames 12, upper ends of right and left rear vertical frames 13 The right and left second horizontal frames 15 connected by welding, the third horizontal frame 16 connected by welding over the upper ends of the right and left rear vertical frames 13, and the right and left front vertical frames 10, a right and left lower frame 11 connected by welding across the lower ends of the right and left middle vertical frames 12, the lower ends of the right and left rear vertical frames 13, an arch-shaped frame 19, and Inverted L-shaped frame 27 in side view As main components, generally in the configuration.
[0011]
As shown in FIG. 1, transparent windshields 17 are fixed to the right and left front vertical frames 10, the first horizontal frame 14, and the frame 19 through seal members. Transparent glass right and left doors 20 each having a sealing member on the outer periphery thereof are supported via hinge members 21 so as to be openable and closable around the vertical axis P1 of the right and left middle vertical frames 12. A transparent rear glass 23 is supported between the right and left rear vertical frames 13 and the third horizontal frame 16 so as to be openable and closable around a horizontal axis around the upper portion of the third horizontal frame 16. Between the right and left middle vertical frames 12 and the right and left rear vertical frames 13, transparent right and left side glasses 22 are supported so as to be openable and closable around the vertical axis P2 of the right and left rear vertical frames 13. ing. A ceiling 30 made of resin and blow-molded is attached to the first, second and third horizontal frames 14, 15 and 16.
[0012]
When the cabin 8 is attached to the airframe, the cabin 8 is completed in advance as described above, and the cabin 8 is viewed from above with respect to the airframe by a crane or the like when the first cover 28 and the second cover 29 described later are not attached. Is lowered substantially vertically, and the cabin 8 is connected to the fuselage (floor 9, right and left rear wheel fenders 31) so as to cover the driving unit 5 as shown in FIGS.
[0013]
As shown in FIGS. 3 and 5, a second cover 29 made of metal (made of sheet metal) is prepared. After the cabin 8 is connected to the machine body as described above, the second cover 29 is attached. The second cover 29 extends to the floor 9 and the clutch housing 18 while covering the upper side, the rear side, the right side and the left side side of the rear half part of the fuel tank 24, and is positioned on the rear side of the rear half part of the fuel tank 24. An opening 29 a is formed in the portion of the second cover 29 that performs. A support member 32 made of metal and formed in a box shape is attached to the upper portion of the second cover 29, and a motor 33 that drives the wiper 36 of the windshield 17 is attached to the support member 32. In this case, you may comprise so that a sound-absorbing material (not shown) may be affixed on the surface of the 2nd cover 29 at the operation part 5 side (paper surface right side of FIG. 3).
[0014]
As shown in FIGS. 1, 3, and 5, a first cover 28 made of resin is prepared. After the second cover 29 is attached as described above, the first cover 28 is attached to the outside of the second cover 29. . Like the second cover 29, the first cover 28 extends to the floor 9 and the clutch housing 18 while covering the upper side, rear side, right and left lateral sides of the fuel tank 24, and the support member 32. . An instrument part 34 is provided on the upper portion of the first cover 28, and an opening 28 a is formed in a portion of the second cover 29 that faces the opening 29 a. An instrument section 34 includes a tachometer (not shown) that displays the number of revolutions of the engine 3, a fuel gauge (not shown) that displays the remaining amount of the fuel tank 24, various display lamps and warning lamps (not shown), and the like. Is provided.
[0015]
As shown in FIGS. 1, 3, and 5, the bracket 35 is attached to the frame 27 through the openings 28 a and 29 a of the first and second covers 28 and 29. A support post 37 that supports a steering shaft (not shown) of the steering handle 6 is supported around the horizontal axis P4 of the bracket 35 so that the angle of the steering handle 6 can be changed. Thus, the angle of the steering handle 6 can be changed. .
[0016]
In the case of the type without the cabin 8 as compared with the type with the cabin 8 as described above, the frame 27 is attached across the support frame 46 and the clutch housing 18 without attaching the second cover 29, and the first cover is provided. Install only 28. In the case of a model that does not include the cabin 8, the wiper 36, the support member 32, and the motor 33 shown in FIG.
[0017]
As shown in FIG. 1, auxiliary steps 38 that are retractable are provided at the right and left ends of the floor 9. As shown in FIG. 6, the auxiliary step 38 is configured by bending a plate material into a U-shape, and a linear first guide long hole 38a and a second guide long hole 38b whose upper side is bent in an arc shape are formed. A stopper portion 38c is formed on the top. A fixed first rod 39 and a second rod 40 that is movable up and down and biased upward by a spring 41 are provided on the floor 9, and the first and second rods 39 and 40 are the first of the auxiliary step 38. And it is inserted in the 2nd guide slot 38a, 38b.
[0018]
The state shown in FIG. 7A is the storage state of the auxiliary step 38. As shown in FIG. 9, an engaging portion 38 d is provided around the horizontal axis P <b> 5 at the front end of the auxiliary step 38, and the engaging portion 38 d of the auxiliary step 38 is engaged with the locking portion 9 a of the floor 9. Thus, the auxiliary step 38 can be held in the stored state. From the storage state shown in FIG. 7 (a), the auxiliary step 38 is pulled out as shown in FIGS. 7 (b) and (c), and the auxiliary step 38 is set to the use state as shown in FIGS.
[0019]
6 and 8, the second rod 40 enters the end of the second guide slot 38b of the auxiliary step 38, and the auxiliary step 38 is held. The load applied to the auxiliary step 38 is supported by the first rod 39, and the downward swing of the auxiliary step 38 around the first rod 39 causes the stopper portion 38c of the auxiliary step 38 to contact the floor 9. Stopped by.
[0020]
As shown in FIGS. 8 to 7 (C), (B), (A), when the auxiliary step 38 is operated to the retracted state, if the auxiliary step 38 is lifted around the first rod 39, the second guide of the auxiliary step 38 is obtained. Since the second rod 40 is pushed down by the cam action of the long hole 38b, the auxiliary step 38 is lifted into a substantially horizontal posture and pushed into the floor 9, and the engaging portion 38d of the auxiliary step 38 is engaged with the engaging portion of the floor 9. By engaging with 9a, auxiliary step 38 is set to the retracted state. By setting the auxiliary step 38 to the retracted state, the auxiliary step 38 does not hit the bag when overcoming the bag.
[0021]
[Another Embodiment of the Invention]
Instead of the structure of the auxiliary step 38 shown in FIGS. 6 to 9, it may be configured as shown in FIGS. 10 and 11 (a) and (b).
As shown in FIG. 10, the auxiliary step 38 includes first and second guide elongated holes 38 a and 38 b and a stopper portion 38 c similar to those in FIG. 6, and the rod 42 fixed to the floor 9 is attached to the auxiliary step 38. It is inserted into the first and second guide slots 38a, 38b. A motor 43 and a winding device 44 are arranged at the lower part of the floor 9, a wire 45 is connected between the winding device 44 and the auxiliary step 38, and a spring 47 that biases the auxiliary step 38 to a use state is provided. Yes. Thus, the auxiliary step 38 can be operated in the use state and the retracted state by winding and unwinding the wire 45 by the motor 43 and the winding device 44.
[0022]
In this case, by operating a switch (not shown) provided in the operation unit 5, the motor 43 and the winding device 44 are operated so that the auxiliary step 38 can be operated in the use state and the storage state. May be. Further, the auxiliary step 38 may be automatically operated to the retracted state while the aircraft is traveling, and the auxiliary step 38 may be automatically operated to be in use when the aircraft is stopped.
[0023]
【The invention's effect】
According to the first aspect of the present invention, in the operating part structure of the work vehicle, the fuel tank and the inverted U-shaped frame on the front side of the cabin are connected to the inverted U-shaped frame, and the reverse L-shaped frame in side view is located immediately after the fuel tank . It covers the rear side and extends to the floor of the driving unit, and extends from the rear side of the first cover made of resin with an instrument unit on the top, the fuel tank and the inverted L-shaped frame to the floor of the driving unit By providing a metal second cover disposed between the first cover and the inverted L-shaped frame , in the case of a type of work vehicle having a cabin, the first cover is configured as a cosmetic cover. However, the second and first covers can prevent the engine sound from entering the cabin, thereby improving the comfort of the work vehicle.
According to the features of claim 1, in the case of a type of work vehicle that does not have a cabin, an increase in production cost can be suppressed by using the first cover as a cosmetic cover and not using the second cover. Can do.
[Brief description of the drawings]
1 is an overall side view of an agricultural tractor. FIG. 2 is an overall perspective view showing the structure of a cabin. FIG. 3 is a longitudinal side view of the vicinity of a support frame and a fuel tank. FIG. 5 is a cross-sectional plan view of the vicinity of the support frame and the fuel tank. FIG. 6 is a perspective view of the vicinity of the auxiliary step in use. FIG. 7 is a front view of the longitudinal section when the auxiliary step is operated in the storage state and use. 8] Longitudinal front view in a state where the auxiliary step is operated. [Fig. 9] Vertical longitudinal front view near the engaging portion of the auxiliary step. [Fig. 10] Perspective view near the auxiliary step in another embodiment of the invention. FIG. 11 is a longitudinal front view when an auxiliary step is operated in a storage state and a use state in another embodiment of the invention.
3 Engine 5 Driving section 8 Cabin 9 Floor 24 Fuel tank 28 First cover 29 Second cover 34 Instrument section

Claims (1)

A work vehicle comprising an engine (3) at the front of the machine body, a fuel tank (24) disposed at the rear side of the engine (3), and an operating unit (5) configured at the rear side of the fuel tank (24). The driving part structure of
A cabin (8) covering the operating part (5) is connected to the airframe, and the cabin (8) is provided with an inverted U-shaped arch-shaped frame (19) at the front left and right center part thereof, and the arch-shaped frame (19) The fuel tank (24) is disposed over the front and rear sides inside, and the inverted L-shaped frame (27) in a side view is placed in the arch-shaped frame (19) in a state of being positioned above and immediately behind the fuel tank (24). Connected to
Covers the top and rear of the inverted L-shaped frame (27) and covers the upper side, the left and right sides, and the rear side of the fuel tank (24) protruding to the cabin side to the floor (9) of the operating unit (5) A resin first cover (28) which is extended and has an instrument part (34) at the top;
Covers the top and rear of the inverted L-shaped frame (27) and covers the upper side, the left and right sides, and the rear side of the fuel tank (24) protruding to the cabin side to the floor (9) of the operating unit (5) A metal second cover (29) that is extended and disposed between the first cover (28) and the inverted L-shaped frame (27) ;
A working part structure of a work vehicle in which the second cover (29) is connected to the arched frame (19) .

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