JP5243297B2 - Work vehicle - Google Patents

Description

  The present invention relates to a work vehicle including a fuel tank behind a driver's seat. More specifically, the fuel tank is directed from the rear of the driver's seat to one side of the driver's seat, and between the driver's seat and one fender. In addition, the present invention relates to a work vehicle that is formed in a substantially bowl shape in plan view along one fender and has operation system members concentrated on the other side of the driver's seat.

  Some conventional work vehicles such as tractors have a fuel tank behind the driver's seat. A storage space is formed in the front of the driver's side of the fuel tank, and the rear part of the fuel tank projects between the lift arms. By doing so, there is one that does not reduce the capacity of the fuel tank (Patent Document 1).

Japanese Utility Model Publication No. 5-13824

  However, such a working vehicle is assumed to be a small or medium-sized model, and can perform continuous work for a certain amount of time in the capacity of the fuel tank. However, in the case of a large model, the fuel efficiency is low. As a result, the time during which work can be continuously performed is short, and the worker has to frequently refuel the vehicle, which is troublesome.

Further, when maintaining a hydraulic case installed under the fuel tank for raising and lowering the rear working machine, it is necessary to remove the fuel tank each time, and there has been a problem that the workability is poor as described above. Furthermore, although the fuel tank supported by the support is protected from vibration in the longitudinal direction of the aircraft, it is not protected from vibration in the lateral direction of the aircraft. There was also a risk of loosening the fixing.
Therefore, an object of the present invention is to make the fuel tank into a shape capable of increasing the capacity, to be able to rotate integrally with the driver's seat, and to be able to prevent vibrations in the lateral direction of the fuselage. A work vehicle having a fuel tank with improved safety and safety is provided.

  For this reason, the invention described in claim 1 is a work vehicle provided with a fuel tank on the transmission case and the hydraulic case between the left and right fenders behind the driver's seat disposed near the center of the fuselage. From the rear of the driver's seat, toward one side of the driver's seat, between the driver's seat and one of the fenders, along the one of the fenders, in a generally bowl shape in plan view It is characterized by that.

  According to a second aspect of the present invention, in the work vehicle according to the first aspect, the fuel tank and the driver's seat are integrally attached to upper surfaces of upper and lower stays fixed to the transmission case and the hydraulic case. The fuel tank is fixed to the lower stay by providing support members around the body in the longitudinal direction at one side and in the lateral direction at the other side.

  According to a third aspect of the present invention, in the work vehicle according to the first or second aspect, the fuel tank is provided with an oil feeding port at one end of the substantially bowl-shaped shape and a return oil port at the other end, A fuel gauge port is provided on the upper surface of the fuel tank.

  According to a fourth aspect of the present invention, in the work vehicle according to any one of the first to third aspects, a tilt shaft is provided through the upper and lower stays at a position below the driver's seat in the lateral direction of the fuselage, so that the driver's seat and the fuel are provided. The tank is provided with the upper stay so as to be rotatable about the tilt shaft as an axis.

  According to a fifth aspect of the present invention, in the work vehicle according to the first aspect, operation system members are concentratedly arranged on the other side of the driver seat.

  According to the first aspect of the present invention, in a work vehicle provided with a fuel tank on the transmission case between the left and right fenders behind the driver seat disposed near the center of the fuselage, the fuel tank is located behind the driver seat. From one side of the driver's seat to the side of the driver's seat, between the driver's seat and one of the fenders, along the one of the fenders, it is shaped in a substantially bowl shape in plan view, greatly increasing the capacity of the fuel tank Can be raised. Moreover, the upper surface of this fuel tank can be utilized as an operator's elbow rest. Therefore, it is possible to provide a work vehicle including a fuel tank with improved workability.

  According to the second aspect of the present invention, the fuel tank and the driver's seat are integrally attached to the upper surface of the upper and lower stays fixed to the transmission case and the hydraulic case, and the fuel tank is positioned at one side in the longitudinal direction of the fuselage. Since the support tool is installed in the left and right direction of the fuselage at the other side position and fixed to the lower stay, the fuel tank is supported on the stay by the arched belt type support tool in the front and rear direction and the left and right direction of the fuselage. Further, it is possible to prevent vibrations in the longitudinal direction and the lateral direction of the airframe applied to the fuel tank at the same time, and to securely fix the fuel tank to the stay. Therefore, it is possible to provide a work vehicle including a fuel tank with improved safety.

  According to the third aspect of the present invention, the fuel tank is provided with an oil feed port at one end of the substantially bowl shape and a return oil port at the other end, and a fuel gauge port on the upper surface of the fuel tank. After the high-temperature return fuel oil discharged from the fuel tank is sufficiently cooled in the fuel tank, it can be sent again from the oil feed port to the engine. In addition, since a fuel gauge port is provided on the upper surface of the fuel tank located approximately in the middle between the oil feed port and the return oil port, shavings generated at the time of manufacture of the fuel tank can be removed from the fuel gauge port. It can be easily extracted and removed. Therefore, it is possible to provide a work vehicle including a fuel tank with improved safety and workability.

  According to the fourth aspect of the present invention, the tilt shaft is provided in the left-right direction of the fuselage at the driver seat lower position of the upper and lower stays, and the driver seat and the fuel tank rotate together with the upper stay with the tilt shaft as an axis. Therefore, by rotating the driver's seat and the fuel tank together, a sufficient maintenance space is created around the hydraulic case that is located below the driver's seat and the fuel tank to raise and lower the rear work implement. Maintenance such as removal of the hydraulic case can be easily performed. Therefore, it is possible to provide a work vehicle including a fuel tank with improved workability.

  According to the fifth aspect of the present invention, since the operation system members are concentrated on the other side of the driver's seat, these operation system levers (members) can be efficiently assembled and maintained. Therefore, it is possible to provide a work vehicle including a fuel tank with improved workability.

It is a left view of a wheel type tractor as an agricultural work vehicle concerning one example of the present invention. It is a top view of the control part in a tractor. It is a left view of the control part which removed the right-and-left fender. It is a perspective view of the control part which removed the right-and-left fender. It is a perspective view of the upper and lower stays showing the mounting structure of the driver's seat and the fuel tank. FIG. 6 is a right side view of a driver seat and a fuel tank provided on the upper and lower stays showing the attachment position of the tilt shaft. It is a left view of the control part which shows rotation of a fuel tank and a driver's seat. It is a left side schematic diagram of the rotated fuel tank.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings.
FIG. 1 is a left side view of a wheel tractor as an agricultural vehicle according to an embodiment of the present invention.

  As shown in FIG. 1, the wheel-type tractor 1 of this example includes a front wheel 2 and a rear wheel 3, and a bonnet 4 is formed on a vehicle body frame 15 above the front wheel 2, and a prime mover part is formed inside the bonnet 4. The engine 5 is provided. A transmission case 9 and a hydraulic case 10 are connected to the rear of the engine 5 via a clutch housing 16.

  And in the control part 8 provided in the back of the bonnet 4, the handle | steering wheel 6 and the driver's seat 7 etc. are provided in the rear part. The driver's seat 7 is disposed above the rear wheel 3 and the transmission case 9 and between the left and right fenders 12 having a shape in which a front portion is bent downward. Further, a fuel tank 13 which is a main part of the present invention described later is installed behind the driver's seat 7. Reference numeral 11 denotes a lops frame provided at the rear of the aircraft.

  The power from the engine 5 is transmitted from a not-shown PTO shaft or the like that protrudes from the mission case 9 via a work equipment mounting device 14 such as a three-point link type, The front working machine (not shown) attached to the machine can be driven, and the working machine can be raised and lowered by the operation of the hydraulic case 10.

  Next, a specific configuration of the fuel tank, which is a feature of the present invention, will be described. 2 is a plan view of the control unit, FIG. 3 is a left side view of the control unit with the left and right fenders removed, FIG. 4 is a perspective view of the control unit with the left and right fenders removed, and FIG. 6 is a perspective view of the upper and lower stays, FIG. 6 is a right side view of the driver's seat and the fuel tank provided on the upper and lower stays showing the attachment position of the tilt shaft, and FIG. 7 is a left side of the control unit showing the rotation of the fuel tank and the driver's seat. FIG. 8 is a left side schematic view of the rotated fuel tank.

  First, as shown in FIGS. 2 to 4, a driver's seat 7 is installed between the left and right fenders 12 at the rear part of the control unit 8, and a rear part of the driver's seat 7 and a part of the driver's seat 7 such as the left side, for example. A fuel tank 13 having a substantially bowl shape having a substantially L shape in plan view is disposed on the side so as to surround the driver's seat 7. In this example, a portion (side surface portion 13b) of the fuel tank 13 is disposed on the left side, which is one side of the driver's seat 7. However, the present invention is not limited to this arrangement, and the portion 13b is disposed on the driver's seat. 7 may be arranged on the right side (the other side).

  As shown in FIG. 5, a lower stay 21 made of a substantially U-shaped metal is attached to the transmission case 9 by bolt fastening or the like, and the front portion is in contact with the upper end of the lower stay 21. The rear portion is placed on the upper surface of the front portion of the upper stay 22 made of a substantially U-shaped metal in a plan view and fixed on the hydraulic case 10 by bolting or the like, and further on the driver seat 7 on the upper stay 22. Can be attached by fastening bolts at multiple locations. In the drawing, illustration of a slide mechanism, a suspension and the like provided in the lower part of the driver's seat 7 is omitted.

  Further, the fuel tank 13 is also fixed to the rear upper surface and the side upper surface of the upper stay 22 by support members 25 and 26 described later. Therefore, the driver's seat 7 and the fuel tank 13 are integrally mounted on the upper stay 22.

  The depth (bottom portion) of the side surface portion 13b located on the side of the driver's seat 7 of the fuel tank 13 is located behind the driver's seat 7 where the hydraulic case 10 and the like are disposed below as shown in FIG. It is formed deeper than the depth of the back surface portion 13a. For this reason, the capacity of the fuel tank 13 as a whole can be further increased. By effectively utilizing such a limited space and newly designing the fuel tank 13, for example, although it varies depending on the size of the fuselage, for example, in the substantially tank-shaped fuel tank 13 of the present invention, The capacity can be 1.2 to 2.0 times that of a conventional fuel tank.

  As shown in FIG. 5, for example, a groove 23 is provided in the vicinity of the front end portion of the side surface portion 13 b (front portion of the airframe) on the peripheral surface of the fuel tank 13, and the front end portion of the back surface portion 13 a. A groove 24 is also provided in the vicinity (right side of the body) in the longitudinal direction of the body.

  Then, for example, belt-type supports 25 and 26 made of an elastic material having a hardness of about 50, such as polyurethane, chloroprene rubber, or silicon rubber, are placed along the peripheral surface of the fuel tank 13 through the grooves 23 and 24. And is fastened to the upper stay 22 by an appropriate method such as a buckle. In this embodiment, a buckle fixing member (not shown) extending from the upper stay 22 is provided, and buckles for fixing both ends of the support tools 25 and 26 are provided on the buckle fixing member.

  As a result, the fuel tank 13 is fixed to the upper stay 22 and the support 25 supports the fuel tank 13 in the left-right direction and the front-rear direction of the airframe. The vibrations in the direction can be also prevented by the support members 25 and 26, and the fuel tank 13 can be stably fixed on the upper stay 22.

  Next, an oil feed port 28 connected to a pipe 27 for discharging the fuel oil in the fuel tank 13 to the engine 5 is provided on the fuel tank 13 at, for example, the lower inner surface at the tip of the side surface portion 13b. A return oil port 30 connected to a pipe 29 for returning the return fuel oil from the engine 5 into the fuel tank 13 is provided on the lower outer surface at the front end portion of the back surface portion 13a. Reference numeral 31 denotes a fuel oil filler opening.

  Therefore, after the high-temperature fuel oil returned from the engine 5 is returned into the fuel tank 13 from the return oil port 30 provided at one end of the fuel tank 13 as described above, the fuel oil is returned to the return oil. It is possible to reliably cool the fuel tank 13 until it reaches the oil feed port 28 provided at the other end of the fuel tank 13 farthest from the port 30, and to discharge the fuel from the oil feed port 28 to the engine 5 again.

  In addition, a fuel gauge for measuring the amount of fuel oil in the fuel tank 13 is inserted on the upper surface of the fuel tank 13 in the vicinity of the boundary position between the rear surface portion 13a and the side surface portion 13b (near the fuel filler port 31). The fuel gauge port 32 is provided.

  For this reason, in the production process of the fuel tank 13, a fuel gauge having shavings of the fuel tank 13 generated when the opening holes of the oil feeding port 28 and the return oil port 30 are formed at a substantially intermediate position between the both ports 28 and 30. It is possible to efficiently discharge and remove from the mouth 32.

  Further, since the fuel tank 13 is configured in a substantially bowl shape, an operator sitting on the driver's seat 7 can place one arm on the upper surface of the side surface portion 13 b of the fuel tank 13.

  Further, in the front side of the lever guide 33 installed on the side of the driver's seat 7 opposite to the side portion 13b (between the right side of the driver's seat 7 and the right fender 12 in the example of FIG. 4), there is a rear work. Operation system members 37 such as a position lever 34 for adjusting the lifting height of the machine, a draft lever 35 for controlling the traction force of the rear working machine, and a select control lever 36 for controlling the lifting height of the front working machine are centrally arranged. This eliminates the need for the operator to search for the desired operation system member 37 in the left and right directions, and forcibly moves the operation system member 37 to the outside of the side surface portion 13b of the fuel tank 13. There is no need to stretch in an unreasonable posture, and operations can be easily performed near the driver's seat 7.

  The lever guide 33 is provided with a traveling system member 40 such as a main transmission lever or an auxiliary transmission lever.

  Next, as shown in FIGS. 5 to 6, the tilt shaft 41 made of a cylindrical metal provided through the left and right contact portions of the upper stay 22 is provided with a rubber material at both ends thereof on the left and right fenders 12. It is attached by bolt fastening or the like through a vibration isolating member such as. Reference numeral 38 denotes a support member for the vibration isolating member.

  Further, a buffer member such as a rubber material (not shown) is provided at a contact portion between the tilt shaft 41 and the upper and lower stays 21 and 22 and on the outer peripheral surface of the tilt shaft 41 or the inner periphery of the holes of the upper and lower stays 21 and 22. The tilt shaft 41 and the upper and lower stays 21 and 22 are preferably brought into indirect contact with each other through the buffer member. In addition, these vibration-proof members 38 and the buffer member can be made of a known material such as isoprene rubber, butadiene rubber, chloroprene rubber, or silicon rubber.

  Accordingly, the upper stay 22 is configured to be able to rotate in the longitudinal direction on the arc locus with respect to the lower stay 21 with the tilt shaft 41 as a rotation axis.

  With such a configuration, when performing maintenance such as removal of the hydraulic case 10 installed below the fuel tank 13, the operator, for example, installs the upper stay 22 and the hydraulic case 10 as shown in FIG. 7. The driver seat 7 and the fuel tank 13, which are integrally formed on the upper stay 22, are tilted together with the upper stay 22 by pushing up the rear portion of the fuel tank 13 forward and upward after removing the bolts to be fixed. With the shaft 41 as the axis, it is rotated forward and upward, for example, about 10 degrees (which can be appropriately designed).

  As a result, for example, in a normal state, the bottom part of the rear part of the fuel tank 13 having a position of about 3 cm from the upper surface of the hydraulic case 10 is moved upward, so that the bottom part of the rear part of the fuel tank 13 and the hydraulic case 10 Since the gap with the upper surface is expanded to about 10 cm (not limited), an operator can hydraulically secure a sufficient space for repairing the hydraulic case 10 from above the hydraulic case 10 or removing the hydraulic case 10. It can be secured above the case 10.

  At this time, as shown in FIG. 7, when the driver's seat 7 and the fuel tank 13 are rotated forward and upward together with the upper stay 22, the upper stay 22 is provided at an appropriate position on the upper stay 22, for example, A stand s (not limited) made of metal or the like can be bolted onto the mission case 9 to fix the driver's seat 7 and the fuel tank 13 at predetermined positions. As shown in FIG. 8, several position fixing tools 42 can be provided at appropriate positions such as front, rear, left, and right lower surfaces of the upper stay 22. As a result, when the fuel tank 13 is rotated to a predetermined position, the operator can lock the tip of the position fixing tool 42 to a locking portion (not shown) such as the body frame 15 or the hydraulic case 10. Maintenance of the hydraulic case 10 and the like can be easily performed.

  In the normal position where the fuel tank 13 is not rotated, the upper stay 22 is fixed to the hydraulic case 10, so that external pressure such as sudden braking is applied to the airframe, so that the upper stay 22 is centered on the tilt shaft 41. It is possible to prevent the driver's seat 7 and the fuel tank 13 from being lifted by turning.

  The position of the fuel gauge port 32 can also be provided on the upper surface of the side surface portion 13b of the fuel tank 13. In this case, the fuel gauge port 32 is arranged at a substantially middle position between the oil feed port 28 and the return oil port 30, and a sheet-like or plate-like member is arranged above the fuel gauge port 32 as a fuel gauge port protecting member. Thus, the fuel gauge port 32 is prevented from rusting due to rain or the like, and the upper surface of the fuel gauge port protection member is made to be a friction surface provided with irregularities so that the arm when the upper surface of the fuel tank 13 is used as an elbow rest It will prevent slipping.

  Further, in a normal installation position where the driver's seat 7 and the fuel tank 13 are not rotated upward and forward together with the upper stay 22, a hook made of metal or the like for fixing the upper stay 22 to the vehicle body frame 15 or the like (not limited), etc. A fixture (not shown) may be provided on the upper stay 22 (which may be the fuel tank 13 or the driver's seat 7).

  As described in detail above, the working vehicle (tractor 1) of this example includes a fuel tank 13 on the transmission case 9 between the left and right fenders 12 behind the driver's seat 7 disposed in the vicinity of the center of the fuselage. The fuel tank 13 faces the driver's seat 7 from one side to the one side of the driver's seat 7, is between the driver's seat 7 and the one fender 12, and along the one fender 12. It is shaped into a shape.

  In addition, the fuel tank 13 and the driver's seat 7 are integrally attached to the upper surfaces of the upper and lower stays 21 and 22 fixed to the transmission case 9 and the hydraulic case 10, and the fuel tank 13 is positioned at one side in the longitudinal direction of the fuselage, and Around the support body 25 in the left and right direction of the machine body at the other side position and fixed to the lower stay 21, an oil feed port 28 is provided at one end of the substantially bowl shape, and a return oil port 30 is provided at the other end, In addition, a fuel gauge port 32 is provided on the upper surface of the fuel tank 13, and further, a tilt shaft 41 is provided through the upper and lower stays 21, 22 below the driver seat 7 in the left-right direction of the fuselage. Is provided so as to be rotatable about the tilt shaft 41 together with the upper stay 22. An operation system member 37 is centrally arranged on the other side of the driver's seat 7.

  In the above-described example, the wheel type tractor of an agricultural work vehicle has been described as an example of the work vehicle. However, the present invention is not limited to this, and a crawler type tractor, a construction work vehicle, or the like is disposed behind the driver's seat. The present invention can be applied to a work vehicle provided with a fuel tank.

7 Driver's seat 9 Mission case 10 Hydraulic case 13 Fuel tank 13a Back surface portion 13b Side surface portion 21 Lower stay 22 Upper stay 23, 24 Grooves 25, 26 Support device 28 Oil supply port 30 Return oil port 32 Fuel gauge port 37 Operation system member 41 Tilt axis

Claims (5)

In a work vehicle provided with a fuel tank on the mission case between the left and right fenders and on the hydraulic case, behind the driver's seat arranged near the center of the fuselage,
The fuel tank is located between the driver's seat and one of the fenders from behind the driver's seat toward one side of the driver's seat and along the one fender. A work vehicle characterized by being shaped into a shape.   The fuel tank and the driver's seat are integrally attached to the upper surface of the upper and lower stays fixed to the transmission case and the hydraulic case, and the fuel tank is at one side position in the longitudinal direction of the fuselage and at the other side position. The work vehicle according to claim 1, wherein a support tool is provided around each of the left and right sides of the machine body and fixed to the lower stay.   The fuel tank is provided with an oil feeding port at one end of the substantially bowl shape and a return oil port at the other end, and a fuel gauge port on the upper surface of the fuel tank. The work vehicle as described in.   A tilt shaft is provided through the upper and lower stays at a position below the driver seat in the left-right direction of the fuselage, and the driver seat and the fuel tank are provided so as to be rotatable about the tilt shaft together with the upper stay. The work vehicle according to claim 1, wherein the work vehicle is a feature.   The work vehicle according to claim 1, wherein operation system members are centrally arranged on the other side of the driver seat.

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