JP2005343182A - Working vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To install electric wires between a front panel 17 of a driving part and a fuel tank 21 positioned ahead of the front panel 17 in such an arrangement as straight from below a fuel tank 21 to above and avoid a complicated structure of the fuel tank as much as practicable. <P>SOLUTION: At the corner of the rear face of the fuel tank 21 at one end in the crosswise direction, an electric wire accommodating recess 24 is formed in the open condition to the back of a vehicle body and outward at the sides of the vehicle body. An engaging tool 40 is provided on the rear face of the fuel tank 21. The engaging tool 40 acts as a stopper on the electric wire 36 from the back of the vehicle body and from the sides and suppresses slipping-out of the electric wire 36 from the recess 24. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a work vehicle in which a meter panel portion is provided on an upper portion of a front panel of a driving portion, and an engine fuel tank is disposed on a front side of a vehicle body of the front panel.

  Conventionally, as the work vehicle, for example, as disclosed in Patent Document 1, first and second covers 28 and 29 (corresponding to a front panel), an instrument section 34 (meter panel section) provided on the upper portion of the first cover 28 And a fuel tank 24 was provided.

JP 2003-2239 A ([0013], [0014] stages, FIGS. 3 and 5)

  In the work vehicle described above, a meter or the like is provided in the meter panel portion, and an electric wire connected to the meter or the like is disposed on the back side of the front panel. Conventionally, between the front panel and the fuel tank, The gap that exists naturally is used for the electric wire passage, and the electric wire passage becomes a bent passage, and a long electric wire is required. In addition, it is difficult to perform wiring work, and the assembly work efficiency is poor.

  An object of the present invention is to provide a work vehicle capable of solving the problems related to the electric wires and the assembly work described above while avoiding complication of the fuel tank structure as much as possible.

In the first aspect of the invention, a work vehicle is provided with a meter panel portion at an upper portion of a front panel of an operation portion, and a fuel tank for an engine disposed on a front side of the vehicle body of the front panel,
An electric wire housing recess is provided in a corner portion on the lateral end side on the rear side of the fuel tank in a state of opening toward the rear of the vehicle body and toward the laterally outer side of the vehicle body, and the electric wire passes through the electric wire housing recess from below the fuel tank. The electric wire is arranged so as to reach the upper side, and a locking tool that acts as a stopper from the rear side of the vehicle body and the lateral side of the vehicle body is provided on the fuel tank so as to prevent the electric wire from coming out of the electric wire receiving recess. It is provided on the rear side.

  That is, an electric wire passage is formed between the fuel tank and the front panel by the electric wire receiving recess of the fuel tank, the electric wire is shortened as much as possible, and the wiring work is easily performed. Wiring can be performed from the top to the top.

  By providing the fuel tank with a groove-shaped wire receiving recess that opens toward the rear of the vehicle body, for example, the wire passage can be formed between the fuel tank and the front panel by the wire receiving recess. In the first aspect of the present invention, the electric wire passage is formed between the fuel tank and the front panel by the electric wire receiving recess opened toward the vehicle body rearward side and the vehicle body laterally outward side of the fuel tank, and the electric wire receiving recess of the fuel tank is formed. And the stopper action on the electric wire by the tank wall facing the outer side of the vehicle body and the stopper action on the electric wire of the locking device make it difficult for the electric wire to come off from the electric wire passage. In comparison, the structure of the fuel tank can be simplified in terms of the shape of the wire receiving recess, etc., while an electric wire passage can be formed between the fuel tank and the front panel, and the electric wire is stabilized so that it does not move easily. It can arrange | position in the state.

  Therefore, according to the first aspect of the present invention, the electric wires can be arranged from the lower side to the upper side with the shortest possible length so that the electric wires can be advantageously wired from the aspect of the electric wire length, and the wiring work is facilitated. The assembly work can be done efficiently. In addition, the fuel tank is provided with the electric wire housing recess but does not have a very complicated structure, and can be obtained at a relatively low cost from the viewpoint of manufacturing the fuel tank.

  According to the second aspect of the invention, in the configuration of the first aspect of the invention, the electric wire is disposed from the fuel tank front side to the rear side of the fuel tank through the lower side of the fuel tank. .

  That is, the electric wire is disposed in a bent state so as to be wound around the lower end side of the fuel tank. In this case, the electric wire is easily bent away from the fuel tank on the rear surface side of the fuel tank due to the bending, but can be arranged in a state in which the separation is suppressed by the stopper action of the locking tool.

  Therefore, according to the second aspect of the present invention, the electric wire is arranged so as to be wound around the fuel tank, but is arranged in a compact state in which it is not greatly separated rearward from the fuel tank by the stopper action of the locking tool. can do.

  According to the third aspect of the present invention, in the configuration of the first or second aspect of the present invention, a screw member for tightening the fastener is insert-molded on the attachment portion to which the stopper of the fuel tank is secured. The fixing seating surface of the mounting portion is formed as a flat surface.

  That is, since the fixing seating surface of the mounting portion is formed as a flat surface, even if the screw member is slightly displaced in the direction along the surface of the fixing seating surface, the screw member does not protrude from the mounting portion. The screw member can be insert-molded.

  Therefore, according to the third aspect of the present invention, the screw member is held by the fuel tank, and the locking tool can be fastened to the fuel tank only by attaching the fastening tool to the screw member. The screw member can be insert-molded so as not to be lifted from the mounting portion, and the screw member can be firmly held by the fuel tank.

Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, a prime mover having an engine 3 that is self-propelled by a pair of left and right front wheels 1 that can be steered and driven and a pair of left and right rear wheels 2 that can be driven and that is located at the front of the vehicle body. A rear part of a transmission case 8 which forms a rear part of a body frame 7 of a self-propelled vehicle body provided with a part 4, a driving part 5 having a driving seat 5a located at the rear part of the vehicle body, and a fall protection frame 6 located behind the driving seat 5a In addition, a link mechanism 9 having a pair of left and right lift arms 9a and a power take-out shaft 10 are provided to constitute a tractor.

  In this tractor, a rotary tiller (not shown) is connected to the rear part of the vehicle body by a link mechanism 9 so as to be movable up and down, and the driving force of the engine 3 is transmitted from the power take-off shaft 10 to the rotary tiller. Various work devices are configured by connecting various working devices to the rear part of the vehicle body so as to be lifted and driven freely, such as to construct a riding type tiller.

  As shown in FIG. A pair of left and right side engine bonnets 15 whose rear end sides are connected to the support frame 14, and an upper engine bonnet 16 whose rear end sides are rotatably connected to the support frame 14 and can swing up and down. A resin front panel 17 provided at the driving section 4 and having a front end fixed to the support frame 14, and a meter panel section provided by detachably connecting a resin panel to the upper end of the front panel 17 18 is provided in the front part of the driving unit 5.

  As shown in FIGS. 2 and 4, an engine fuel tank 21 is provided above the clutch housing 19 on the front side of the vehicle body of the front panel 17 in a portion partitioned from the engine room by a partition plate 20 that also serves as a heat insulating plate. It is arranged. The fuel tank 21 is further configured so that the rear side of the tank is covered by the front panel 17 and the meter panel 18 and the front side of the tank is covered by the side engine bonnet 15 and the upper engine bonnet 16. A fuel inlet 21a is arranged as desired in the opening of the upper engine bonnet 16, and a flange 22 as shown in FIG. It is fixed to the support frame 14.

  As shown in FIG. 3, a tachometer 30 that displays the number of revolutions of the engine 3 and a fuel that displays the amount of engine fuel stored in the fuel tank 21 are displayed on the instrument panel of the meter panel unit 18 of the operation unit 5. 31 and a water temperature meter 32 for displaying the temperature of the engine cooling water, and a combination switch 33 for operating the headlamp and the horn is provided at a part removed from the instrument panel on the lateral end side of the meter panel unit 18. A key switch 34 for turning on and off the power source and the engine 3 is provided on the upper side of the side end of the panel 17. The wires for the meters 30, 32 and the switches 33, 34 are arranged based on the wiring structure shown in FIGS.

  That is, as shown in FIGS. 5, 6, and 7, the fuel tank 21 is manufactured by blow molding of a resin material, and the rear wall 23 of the fuel tank 21 is formed into a bent shape at the time of blow molding. Accordingly, a tank wall surface 24a facing toward the rear of the vehicle body and a tank wall surface 24b facing toward the outer side of the vehicle body are provided at a corner portion of the tank upper portion on the lateral end side on the rear surface side of the fuel tank 21. An electric wire housing recess 24 that is open in the direction is provided. A screw member 25 embedded in the rear wall portion 23 of the fuel tank 21 as shown in FIG. 8 below the wire receiving recess 24 on the rear surface side of the fuel tank 21 and the screw member 25 on the seat surface. A mounting portion 27 having a stop seating surface 26 in a state of being located substantially at the center is provided. In the blow molding of the fuel tank 21, the wire passage 28 is formed by providing a notch on the tank bottom side of the flange portion 22 integrally formed around the fuel tank 21.

  As clearly shown in FIG. 8, the screw member 25 of the mounting portion 27 is embedded in the mounting portion 27 by insert molding on the rear wall 23 of the fuel tank 21 when the fuel tank 21 is blow-molded. . The seating surface 26 is formed at the same time as the fuel tank 21 is blow-molded, and is formed on a flat surface so that the screw member 25 can be easily embedded without being raised from the seating surface 26. .

  As shown in FIGS. 2 and 4, a rotational speed measuring device (not shown) of the engine 3, a fuel supply device (not shown), a starting device (not shown), a radiator water temperature meter (not shown), a headlight In the state where each electric wire 36 extended from each of a light and a sound alarm (not shown) is a group of electric wires collectively attached to one protective tube 37 as shown in FIGS. When passing through the inner side of the side engine bonnet 15 from the front side of the vehicle body 4 to the rear side and reaching the rear end portion of the driving part 4, the wire passage 28 below the fuel tank 21 passes from the front side of the fuel tank 21 to the rear side of the vehicle body. When the fuel tank 21 reaches the rear side of the fuel tank 21, the fuel tank 21 and the front panel 17 rise from the lower side of the fuel tank 21 in a state substantially along the vertical line and pass through the electric wire housing recess 24. When reaching above the tank 21, the fuel tank 2 1 and the meter panel 18 are passed through in the lateral direction of the vehicle body, and the electric wire 36 to be connected to the water temperature gauge 32, the tachometer 30, the combination switch 33, and the key switch 34 is separated from the electric wire group above the fuel tank 21. The wiring is provided so as to reach each of the meters 30 and 32 and the switches 33 and 34.

  As shown in FIG. 4, the locking action portion 41 acts on the wire group passing through the wire receiving recess 24 below the wire receiving recess 24 on the rear side of the fuel tank 21 slightly on the lateral side. A configured locking tool 40 is provided. As clearly shown in FIG. 8, the locking tool 40 is a connecting portion 42 located at the end opposite to the side where the locking action portion 41 is located, and is a screw of the mounting portion 27 of the fuel tank 21. The member 25 and the connecting bolt 43 attached to the screw member 25 are fastened to the seating surface 26 of the mounting portion 27 by a tightening force. The locking action portion 41 of the locking tool 40 is provided with an arc-shaped locking action surface 41a as viewed along the axis of the wire group passing through the wire receiving recess 24, and the wire group is included in the wire receiving recess 24. The locking tool 41 acts as a stopper from the rear side of the vehicle body and the lateral side of the vehicle body by the locking action surface 41a from the rear side of the vehicle body and from the lateral side of the vehicle body. Is prevented from coming out of the electric wire receiving recess 24.

  That is, an electric wire passage is formed between the fuel tank 21 and the front panel 17 by the electric wire receiving recess 24 of the fuel tank 21, and the electric wire 36 is wired so as to easily pass in a straight line from the lower side to the upper side of the fuel tank 21. doing. A stopper action on the electric wire 36 by the tank wall surface 24a facing the rear of the vehicle body and the tank wall surface 24b facing the outer side of the vehicle body forming the electric wire receiving recess 24 of the fuel tank 21, and the electric wire 36 of the locking tool 17 from the rear side of the vehicle body. The wires 36 are wired so as not to easily come out of the wire passage due to the stopper action and the stopper action from the lateral side of the vehicle body.

As shown in FIG. 3, the driving unit 5 includes a forward / reverse lever 51 disposed on one lateral side of the steering wheel 50, an elevating lever 52 disposed on the other lateral side of the steering handle 50, and a hand accelerator lever. 53, a tilt lever 54, a double speed lever 55, and a parking brake lever 56 disposed below the steering handle 50 are provided.
The lift lever 52 swings up and down the vehicle body to lift and lower the lift arm 9a. The hand accelerator lever 53 adjusts an accelerator device (not shown) of the engine 3 and holds the adjusted speed state. The tilt lever 54 switches the angle changing mechanism (not shown) between the unlocked state and the locked state when changing and adjusting the attachment angle of the steering handle 53. The double speed lever 55 is used to switch the front wheel speed increasing device (not shown) between the speed increasing state and the constant speed state in conjunction with the steering operation of the front wheel 1 and to the steering operation of the front wheel 1. Regardless of whether or not the vehicle is fixed at a constant speed, the vehicle can turn while driving the front wheel 1 at a higher speed than the rear wheel 2 or turn while driving the front wheel 1 and the rear wheel 2 at a constant speed. It is possible to run. The parking brake lever 56 switches the parking brake (not shown) between the on state and the off state.

  As shown in FIG. 1, a balance weight 60 is provided at the front end of the body frame 7. The balance weight 60 is formed by casting using a container-shaped casting mold that has an upward opening that opens over the entire surface of the casting mold on the upper end side of the casting mold, and injects a solution from the opening or takes out a cast product. And it is configured as shown in FIG. In other words, the narrow portion 60a is provided with a weight vertical mounting hole 61 so that the narrow portion 60a is provided on the rear end side.

As shown in FIGS. 10, 11, and 12, the mounting structure of the balance weight 60 includes a pair of left and right main frames 63 that constitute the vehicle body frame 7, a connecting frame 64 that connects the front end portions of both main frames 63, A front bottom plate 65 and a rear bottom plate 66 connected to the lower ends of the frames 63 and 63 are provided.
That is, the balance weight 60 is dropped between the main frames 63 from above, and the lowermost end portion 60b of the balun weight 60 projects downward from between the front bottom plate 65 and the rear bottom plate 66, and the front end side bottom portion 60c of the balance weight 60 is obtained. Is placed on the front bottom plate 65, and the rear end side bottom portion 60 d of the ballathway 60 is placed on the rear bottom plate 66. The balance weight 60 is fastened and fixed by a connecting bolt 67 attached to the mounting hole 61 and attached to the screw hole 66a of the rear bottom plate 66.

Another embodiment
The present invention can be applied to a tractor provided with a driving cabin in addition to a tractor provided with the overturn protection frame 6 as in the above embodiment. Moreover, it can be applied to various vehicles such as lawn mowers and rice transplanters in addition to tractors, and these tractors, lawn mowers, rice transplanters and the like are collectively referred to as work vehicles.

  Further, in the case of a tractor equipped with an operation cabin, the electric wires 36 from each device of the prime mover 4 do not pass through the electric wire passage 28 of the fuel tank 21 and pass under the fuel tank 21 and below the floor plate in the cabin. The wiring is carried out through the through hole of the floor plate so as to reach between the fuel tank 21 on the rear surface side of the fuel tank and the front panel 17.

Side view of the entire tractor Side view of fuel tank installation part Perspective view of the front of the driving unit Rear view of the fuel tank area Fuel tank side view Rear view of fuel tank Top view of fuel tank Cross-sectional view of the fuel tank locking device Cross section of fuel tank wire housing recess Longitudinal side view of balance weight mounting part Top view of the balance weight mounting part Front view of the balance weight mounting section Balance weight perspective view

Explanation of symbols

5 Operation part 17 Front panel 18 Meter panel 21 Fuel tank 24 Electric wire accommodation recessed part 25 Screw member 26 Seating surface 27 Attachment part 36 Electric wire 40 Locking tool

Claims (3)

A working vehicle in which a meter panel portion is provided at an upper portion of a front panel of a driving portion, and a fuel tank for an engine is disposed on a front side of the vehicle body of the front panel,
An electric wire housing recess is provided in a corner portion on the lateral end side on the rear side of the fuel tank in a state of opening toward the rear of the vehicle body and toward the laterally outer side of the vehicle body, and the electric wire passes through the electric wire housing recess from below the fuel tank. The electric wire is arranged so as to reach the upper side, and a stopper that acts as a stopper from the rear side of the vehicle body and the lateral side of the vehicle body is provided on the fuel tank so as to prevent the electric wire from coming out of the electric wire receiving recess. Work vehicle provided on the rear side.   The work vehicle according to claim 1, wherein the electric wire is disposed from the front side of the vehicle body to the rear surface side of the fuel tank through the lower side of the fuel tank from the fuel tank.   A screw member for fastening the fastener is provided by insert molding at an attachment portion to which the stopper of the fuel tank is attached, and a fixing seat surface of the attachment portion is formed on a flat surface. Item 3. The work vehicle according to item 1 or 2.

Images