WO2006098078A1 - Tank structure for working vehicle - Google Patents

Abstract

A tank (90, 91) mounted on a working vehicle (1) and containing fuel or operating oil. The tank (90, 91) has a step shape and is shaped such that the lower part of the tank (90, 91) projects sideways. A step surface (92) provided on the tank (90, 91) is inclined to one direction. The tank (90, 91) is hanged from the bottom surface of a mast section (64) projected outward from a chassis (9). A stay (95) for fixing a battery (98) is disposed on the tank (91), and an opening (95b) for hanging the tank (91) at the time of assembly is provided in the stay (95). The construction reduces the number of parts of a fuel tank or an operating-oil tank of a working vehicle and facilitates assembly.

Description

 Specification

 Tank structure of work vehicle

 Technical field

 TECHNICAL FIELD [0001] The present invention relates to a technique for reducing the number of parts of a work vehicle, and more particularly to a tank shape mounted on the work vehicle and a configuration for reducing parts around the tank mounting portion.

 Background art

 Conventionally, a fuel tank or a hydraulic oil tank mounted on a work vehicle is known as a part of a boarding / alighting member. For example, it is known that a step is attached to a tank mounted on a work vehicle and used as a staircase. This is to be fixed to the boarding step on the side surface of the fuel tank or hydraulic oil tank arranged in the vertical direction on the side of the work vehicle. The step is fixed directly to the side of the tank. (See Patent Document 1).

 Disclosure of the invention

 Problems to be solved by the invention

 [0003] In the conventional technology, a step is simply attached to a side surface of a fuel tank or a hydraulic oil tank. The tank is used as a support member for the step, and the tank itself is not used effectively. The technique disclosed in Patent Document 1 has a structure in which the step is projected from the side surface of the tank, and the load applied to the step is concentrated on the tank side surface mounting portion. For this reason, it is necessary to sufficiently increase the rigidity of the tank side surface. In addition, since the tank for storing hydraulic oil and fuel is arranged in the vertical (vertical) direction, the fuel tank itself becomes more important, and the center of gravity of the work vehicle 1 in which such a fuel tank is arranged becomes higher. It is easy to influence.

 In addition, a step for fixing to the fuel tank is required as a part, and the number of parts constituting the work vehicle increases, which requires work man-hours and labor in the assembly process.

 Means for solving the problem

[0004] The present invention is a tank that is mounted on a work vehicle and holds fuel or hydraulic oil. The tank is shaped like a staircase, with the lower part of the tank protruding sideways. The staircase provided on the tank is inclined in one direction.

 A tank is hung from the bottom of the mast that protrudes outside the chassis.

 A stay for fixing the battery is provided on the tank, and an opening for suspending the tank when assembling is provided on the stage.

 The invention's effect

 In the present invention, the tank can be used as a stairway for getting on and off, and the tank capacity can be expanded. In addition, the number of parts including the stairway for getting on and off can be reduced, and the cost for assembling and manufacturing can be reduced. Since the load applied to the tank staircase can be received by the tank itself, local concentration of the load can be prevented and the durability of the tank as a step can be improved. By projecting to the side, sufficient tank capacity can be secured even at a small height.

 This makes it easier to remove dirt, mud, and water on the staircase surface and improve the cleanability of the tank. In addition, it is possible to suppress the slipping of the feet when getting on and off.

 The structure near the tank arrangement part can be simplified, and the number of parts of the tank arrangement part can be reduced. In addition, the tank can be mounted directly on a highly rigid frame, so the step rigidity can be secured.

 The battery can be placed directly on the tank surface, reducing the number of parts and improving the ease of assembling the tank.

 Brief Description of Drawings

 [0006] FIG. 1 is an overall side view of a work vehicle.

 FIG. 2 is a plan view showing a frame of the work vehicle.

 [Fig. 3] Side view.

 [Fig. 4] Same front view.

 FIG. 5 is a perspective view showing an arrangement configuration of a tank.

 [Fig.6] Front view.

 [Fig. 7] Side view.

[FIG. 8] A diagram showing the assembly configuration of the fuel tank. 9] A perspective view of the fuel tank.

 10] A side view of the fuel tank.

 [Fig. 11] Plan view of the fuel tank.

 12] A schematic diagram showing the left-right inclination configuration of the step surface.

 13] A schematic diagram showing an inclined configuration in the front-rear direction of the step surface.

 Explanation of symbols

 62b beam

 64b mast bottom

 90 hydraulic oil tank

 91 Fuel tank

 92 Step surface

 93 Inlet

 94 Non-slip

 95 stays

 98

 BEST MODE FOR CARRYING OUT THE INVENTION

 The present invention forms a stairway for getting on and off by a tank and reduces the number of parts of a work vehicle.

Example 1

[0009] [Overall configuration]

 A work vehicle according to an embodiment of the present invention will be described.

 Figure 1 is an overall side view of the work vehicle.

 A work vehicle 1 shown in FIG. 1 is a tractor loader backhoe, to which a loader 2 and a digging device 3 are attached. A control unit 4 is provided at the center of the work vehicle 1, a loader 2 is disposed in front of the control unit 4, and an excavator 3 is disposed behind the control unit 4. The work vehicle 1 is equipped with front wheels 8 and 8 and rear wheels 7 and 7, and is configured to be able to travel with the loader 2 and the excavator 3 attached thereto.

The steering unit 4 is provided with a steering handle 5 and a cockpit 6, and the side of the seat 6 On the side, a traveling operation device and an operation device for the loader 2 are arranged. As a result, the steering operation of the work vehicle 1 and the operation of the loader 2 can be performed in the control section 4. A loader 2 as a loading device is connected to the side of the work vehicle 1 and extends forward, and a packet is attached to the tip. At the front of the frame 9, which is the chassis of the work vehicle 1,

An engine is arranged, and a bonnet 30 arranged on the frame 9 covers this. The loader 2 is disposed outside the bonnet 30.

 The excavator 3 is detachably attached to the rear portion of the work vehicle 1, and the excavator 3 is operated by an operating device disposed behind the cockpit 6.

 A hydraulic oil tank 90 is disposed on the side of the control unit 4, and the hydraulic oil tank 90 also serves as a step when getting in and out of the control unit 4, and is opposite to the control unit 4. Has a staircase composed of fuel tanks.

[Frame structure]

 Next, the frame configuration of the work vehicle will be described.

 FIG. 2 is a plan view showing the frame of the work vehicle.

 Figure 3 is also a side view.

 Figure 4 is also a front view.

 The frame 9 of the work vehicle connects the side frames 62 and 62 arranged in parallel in the front-rear direction and the front frames 63 and 63 connected to the front part of the side frames 62 and the front parts of the front frames 63 and 63. It consists of a front plate 61. A mast portion 64 is formed on the outer surface of the front frame 63, and the front frames 63 and 63 are connected by ribs 65.

 A connecting member is disposed between the side frames 62 and 62, and the frame 9 has a ladder structure. A beam 62b extends from the side frame 62 toward the side. The beam 62b has a C-shaped cross section and supports the floor of the control unit 4.

The front frame 63 extends upward from the connection portion with the side frame 62, and a mast portion 64 is attached to the portion extending upward. An engine is disposed between the front frames 63 and 63, and a bonnet 30 is disposed. The mast section 64 has a loader 2 The loader 2 is supported by the mast 64.

 A mast lower part 64b, which is a lower part of the mast part 64, is constituted by a member protruding sideways. The mast lower part 64b is configured by a member having a cross-sectional shape that is shaped like an L, and receives a vertical force applied to the mast part 64.

[0011] [Tank arrangement]

 Next, the configuration of the tank disposed in the work vehicle will be described.

 FIG. 5 is a perspective view showing the arrangement configuration of the tank.

 Figure 6 is also a front view.

 Figure 7 is also a side view.

 A hydraulic oil tank 90 and a fuel tank 91 are disposed on the side of the control unit 4 of the work vehicle 1. The hydraulic oil tank 90 and the fuel tank 91 are disposed on the side of the frame 9 and are suspended from the frame 9, and are connected to the lower surfaces of the mast lower part 64b and the beam 62b, respectively. It has a configuration. Both the mast lower part 64b and the beam 62b protrude from the side frame 62 constituting the frame 9 to the side.

 In this embodiment, as shown in FIG. 6, a hydraulic oil tank 90 is disposed on the right side of the frame 9 of the work vehicle, and a fuel tank 91 is disposed on the left side. The hydraulic oil tank 90 and the fuel tank 91 are formed in a stepped shape (L-shape) when viewed from the front, and the lower part protrudes to the side (outside the fuselage) from the upper part. Thereby, even if the height is low, a sufficient tank capacity can be secured, and the fuel tank 91 and the hydraulic oil tank 90 can be configured compactly in the vicinity of the control unit 4.

 Then, the stepped surface of the tank can be used as a step when getting on and off the control unit 4. In addition, slippers 94 and 94 are mounted at the corners of the hydraulic oil tank 90 and the fuel tank 91, respectively, to ensure stability when getting on and off.

In the fuel tank 91, an injection port 93 is provided so as to project obliquely upward and outward, and the injection port 93 is provided between an upper portion 91a and a lower portion 92b of the fuel tank 91. The fuel tank 91 is disposed at a portion formed at a right angle on the outer side of the fuel tank 91. A battery 98 is disposed on the upper surface of the fuel tank 91. The battery 98 is disposed between the mast lower part 64b and the beam 62b. As described above, since the hydraulic oil tank 90 and the fuel tank 91 are arranged, the force S can be used to use the hydraulic oil tank 90 and the fuel tank 91 as steps for getting on and off when getting on and off the control unit 4. In addition, since the hydraulic oil tank 90 or the fuel tank 91 is stepped on and off when getting on and off, it is possible to recognize the change in hydraulic oil or fuel volume by hearing the sound when stepping on. The battery 98 can be disposed using the gap between the frames 9, and the space on the side of the frame 9 can be used effectively.

 The battery 98 disposed on the fuel tank 91 is covered by a cover mounted on the work vehicle 1 and is protected from rainwater and earth and sand.

[0013] [Fuel tank]

 Next, the configuration of the fuel tank 91 of the work vehicle will be described.

 Fig. 8 shows the assembly configuration of the fuel tank.

 Fig. 9 is a perspective view of the fuel tank.

 Figure 10 is a side view of the fuel tank.

 Figure 11 is a plan view of the fuel tank.

 The fuel tank 91 is configured in a stepped shape when viewed from the front, and has a shape in which a lower part 91b protrudes laterally from an upper part 91a of the fuel tank 91. The upper surface of the lower portion 91b is a step surface 92, and a slip stopper 94 is attached to the edge of the step surface 92. By configuring the fuel tank 91 in this way, the center of gravity of the fuel tank 91 can be lowered. Further, the fuel tank 91 has a shape in which the front and outer sides are notched in a plan view, and the fuel tank 91 is attracted to an obstacle or the like when the work vehicle 1 is traveling. In addition, the injection port 93 of the fuel tank 91 is located in the vicinity of the notch portion in plan view, and remains on the step surface 92 even when fuel leaks during fuel injection.

[0014] Since the fuel tank 91 having a smooth bottom surface is disposed between the front wheel 8 and the rear wheel 7, the mud and soil wound up by the front wheel 8 and the rear wheel 7 are received by the smooth bottom surface of the fuel tank 91. The mud and soil adhering during cleaning can be easily washed off. Further, the hydraulic oil tank 90 disposed on the opposite side of the fuel tank 91 also exhibits the same effect.

In the upper portion 91a of the fuel tank 91, stays 95 and 95 are fixed to the upper surface. The stay 95 fixes the battery 98 placed on the fuel tank 91, and the upper part 91a The end of the stay 95 on the outside (the side away from the fuselage) spreads outward. As a result, the battery 98 can be easily placed on the fuel tank 91, and the labor for assembling the battery 98 is reduced.

[0015] The stay 95 is provided with a hole 95b (opening), which is used for fixing the battery 98 and assembling the fuel tank 91.

 The battery 98 is placed on the fuel tank 91 between the stays 95 and 95, and the latch 99 is attached from above the battery 98. The hook 98 at the tip end of the locking tool 99 is locked to the hole 95 b of the stay 95, whereby the battery 98 is fixed to the upper surface of the fuel tank 91 by the locking tool 99. The hole 95b provided in the stay 95 can be used as a hole for hanging when the fuel tank 91 is assembled to the frame 91 of the work vehicle. Thereby, the labor at the time of the assembly of the fuel tank 91 can be reduced. Since the fuel tank 91 is mounted in a suspended state between the mast lower part 64b and the beam 62b, the stay 95 is located between the mast lower part 64b and the beam 62b in plan view and is located above the stay 95 when assembled. In this case, the fuel tank 91 can be easily suspended by the step 95 that the member has. Since the fuel tank 91 is suspended and attached to the bottom of the mast lower part 64b and the beam 62b, the attachment work becomes easy.

 [0016] [Inclination of the step surface]

 Next, the configuration of the step surface 92 will be described.

 FIG. 12 is a schematic diagram showing a left-right inclined configuration of the step surface. Fig. 12 (a) is a schematic diagram showing the inclined state of the step surface. FIG. 12 (b) is a schematic diagram showing the configuration of the step surface when riding. FIG. 13 is a schematic diagram showing an inclined configuration in the front-rear direction of the step surface. Fig. 13 (a) is a schematic diagram showing the forward inclined state of the step surface. FIG. 13 (b) is a schematic diagram showing the rearward inclined state of the step surface.

[0017] The step surface 92 of the fuel tank 91 and the hydraulic oil tank 90 can be improved in getting on and off by inclining the step surface 92 so that the outside is lower than the inside. At the time of boarding, since the boarding is carried out from the side of the work vehicle, the step surface 92 faces the traveling direction of the passenger. As a result, it becomes easy to generate resistance in the surface direction on the step surface 92. That is, when the step surface 92 is inclined by the angle Θ with respect to the force Fs exerted on the feet when boarding, the vertical resistance Fv is generated. The vertical resistance Fv is obtained by Fs' sin (Θ). It is.

 Inclining the step surface 92 in this manner makes it difficult for the foot to slip, makes it easy to get on and off, and improves the cleanability of the step surface 92. And when getting off, since the step surface 92 faces outward, the ankle bending angle of the foot placed on the step surface 92 increases. Thereby, the burden on the foot when getting off can be reduced. An anti-slip 94 is provided at the edge of the step surface 92 to prevent slipping on the step surface 92 when getting on and off.

 It should be noted that the inclination angle Θ of the step surface 92 is determined within a range in which sufficient boarding / exiting ability can be maintained.

 [0018] Further, by tilting the step surface 92 in the front-rear direction as shown in FIG. 13, it becomes easy to discharge earth and sand, mud, water, etc., and the cleanability of the step surface 92 can be improved. That is, by cleaning the step surface 92 by an angle Θ with respect to the horizontal, the cleanability of the step surface 92 can be improved. Note that the inclination angle Θ of the step surface 92 is determined within a range in which sufficient boarding / exiting ability can be maintained. When the outside of the tank is washed from the side of the work vehicle 1 with water discharge, etc., the water is discharged to the front or rear side, so that the workability of the washing work in which muddy water splashes back on what is discharged is improved. .

 Since the inner upper surfaces of the fuel tank 91 and the hydraulic oil tank 90 are inclined, the air in the fuel tank can be smoothly vented. In addition, since the fuel and hydraulic oil adhering to the inner upper surface can be returned smoothly downward, deterioration of the hydraulic oil and vaporization of the fuel can be suppressed. Receiving the force generated by steering the work vehicle, the fuel can easily move along the inner inclined surface, improving the cleanability of the tank and suppressing the craving in the tank.

 Industrial applicability

The present invention can be used for a tank shape and a tank mounting portion configuration of a work vehicle or the like.

Claims

The scope of the claims  [1] A tank that is mounted on a work vehicle and holds fuel or hydraulic oil, and has a stepped shape, and the lower part of the tank is configured to protrude sideways. Tank structure.  [2] The tank structure for a work vehicle according to claim 1, wherein a staircase surface provided in the tank is inclined in one direction. [3] The tank structure for a work vehicle according to claim 1, wherein the tank is suspended from the bottom surface of the mast portion that protrudes to the outside of the chassis. [4] The tank structure for a work vehicle according to claim 1, wherein a stay for fixing the battery is provided on the tank, and an opening is provided to suspend the tank when assembled to the stage.