Work equipment

Abstract

To provide a work machine allowing a tank to be easily fixed to a machine body.SOLUTION: A work machine comprises: a machine body 2; a tank body 131 storing liquid; a tank 130 including a cylindrical part 132 projecting in a projecting direction oblique to an outer surface 131a from the outer surface 131a of the tank body 131a; a fixation piece 133 having a through hole into which the cylindrical part 132 is inserted and fixing the tank 130 to the machine body 2, wherein the machine body 2 supports the tank 130; and an elastic member 145 sandwiched between the fixation piece 133 and the cylindrical part 132. The cylindrical part 132 has one end connected to the tank body 131 and the other end forming a liquid supply port 135. The elastic member 145 is fitted onto the cylindrical part 132 in a state it is nearly parallel to the outer surface 131a and not perpendicular to the projecting direction of the cylindrical part 132. The fixation piece 133 is fixed to the machine body 2 in a state it is fitted onto the elastic member 145 fitted onto the cylindrical part 132 and nearly parallel to the outer surface 131a.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present invention relates to a work machine equipped with a tank for storing a liquid such as fuel.

Background Art

[0002] Conventionally, a work machine disclosed in Patent Document 1 is known. The work machine disclosed in Patent Document 1 includes a fuel tank for storing fuel supplied to a prime mover. The fuel tank is provided with a cylindrical portion that protrudes in a direction inclined obliquely upward from the outer surface of the tank, and a fuel filler port is provided at the tip of this cylindrical portion.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the technique of Patent Document 1 described above, since the cylindrical portion is provided obliquely, there is a problem that workability is poor when fixing the cylindrical portion to the machine body. For example, when a plane perpendicular to the protruding direction of the cylindrical body and the mounting surface of the member for fixing the cylindrical portion to the machine body are non-parallel, it takes time to insert the member through the cylindrical portion or position the member in a state non-perpendicular to the protruding direction with respect to the cylindrical portion.

[0005] In view of the above problems, an object of the present invention is to easily fix a tank provided with a cylindrical portion protruding in a direction inclined from the tank body to the machine body.

Means for Solving the Problems

[0006] The work machine of the present invention includes a machine body, a tank body for storing a liquid, and the The top surface from the outer surface of Vertically upwardIt protrudes in a direction that is inclined relative to it. It has an inclined portion and a non-inclined portion that protrudes vertically upward from the outer surface. The device comprises a tank including a cylindrical portion, a fixing piece having a through hole through which the cylindrical portion is inserted and for fixing the tank to the machine body, and an elastic member sandwiched between the fixing piece and the cylindrical portion, wherein the cylindrical portion has one end connected to the tank body and the other end forming a liquid supply port, and the elastic member is The lower surface of the elastic member The outer surface is substantially parallel to the aforementioned outer surface. Furthermore, the elastic member is fitted onto the cylindrical portion in a state not perpendicular to the inclined portion of the cylindrical portion, and the inner circumferential surface of the elastic member has an inclined inner circumferential surface parallel to the inclined portion and a non-inclined inner circumferential surface parallel to the non-inclined portion. The fixing piece is fitted onto the elastic member fitted onto the cylindrical portion, substantially parallel to its outer surface, and is fixed to the machine body. [Effects of the Invention]

[0007] According to the present invention, a tank having a cylindrical portion that protrudes in an inclined direction from the tank body can be easily fixed to the aircraft. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is an overall side view of a work machine according to one embodiment of the present invention, viewed from the right. [Figure 2] Figure 2 is an overall perspective view of the work machine according to the same embodiment, viewed from the right. [Figure 3] Figure 3 is a plan view of the machine body of the work machine according to the same embodiment. [Figure 4] Figure 4 is a perspective view showing the mounting structure of the tank to the rotating base plate of the work machine according to the same embodiment. [Figure 5] Figure 5 is a plan view of the tank of the work machine according to the same embodiment, seen from above. [Figure 6] Figure 6 is a partial cross-sectional view of the VI-VI section in Figure 5. [Figure 7] Figure 7 is a longitudinal cross-sectional view of the strainer of the work machine according to the same embodiment. [Figure 8] Figure 8 is a longitudinal cross-sectional view of the cap of the work machine according to the same embodiment. [Figure 9] Figure 9 is an exploded perspective view of the area around the cylindrical part of the work machine according to the same embodiment. [Figure 10] Figure 10 is a partial cross-sectional view of the VII-VII section in Figure 5. [Figure 11] FIG. 11 is an explanatory view of the attachment procedure of the elastic member and the fixing piece to the cylindrical portion. [Figure 12] FIG. 12 is an explanatory view of the attachment procedure of the elastic member and the fixing piece to the cylindrical portion. [Figure 13] FIG. 13 is an explanatory view of the attachment procedure of the elastic member and the fixing piece to the cylindrical portion. [Figure 14] FIG. 14 is an explanatory view of the attachment procedure of the elastic member and the fixing piece to the cylindrical portion.

BEST MODE FOR CARRYING OUT THE INVENTION

[0009] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0010] FIG. 1 is a side view showing the overall configuration of the working machine 1 according to the present embodiment. FIG. 2 is a perspective view showing the overall configuration of the working machine 1 according to the present embodiment. In the present embodiment, the direction of arrow A1 in FIG. 1 is defined as the front, the direction of arrow A2 in FIG. 1 is defined as the rear, and the direction of arrow A3 in FIG. 1 is defined as the front-rear direction for explanation. Also, the front side in FIG. 1 is defined as the right side, and the back side in FIG. 1 is defined as the left side for explanation. Further, the horizontal direction, which is perpendicular to the front-rear direction A3, is defined as the width direction for explanation.

[0011] As shown in FIGS. 1 and 2, the working machine 1 of the present embodiment includes a machine body 2, a traveling device 3 that supports the machine body 2 so as to be travelable, a prime mover 91 (see FIG. 3), and a working device 4. The prime mover 91 drives a hydraulic pump 95 described later, and the traveling device 3 and the working device 4 are driven by the hydraulic pressure supplied from the hydraulic pump 95.

[0012] In the present embodiment, in addition to the prime mover 91, the working machine 1 includes a weight 25 for achieving a weight balance with the working device 4, a cabin for accommodating the driver's seat 6, etc., and the machine body 2 supports the mounted objects such as the prime mover 91, the weight 25, and the cabin.

[0013] Specifically, as shown in FIG. 2, the machine body 2 includes a frame to which the traveling device 3 is connected, a slewing bearing fixed to the frame, and a slewing base plate 5 attached to the frame via the slewing bearing so as to be rotatable (slew) with respect to the frame. On the slewing base plate 5, a driver's cab 6 (cab), a weight 25, etc. are arranged. In the present embodiment, the work machine 1 has a cover 14 that covers the prime mover 91, the weight 25, etc. That is, the load such as the weight 25 is covered by the cover (hereinafter referred to as the exterior cover) 14.

[0014] In the present embodiment, the traveling device 3 is a crawler-type device (continuous traveling device). The prime mover 91 is an internal combustion engine (engine). Accordingly, as shown in FIG. 3, the work machine 1 includes a tank (hereinafter referred to as the fuel tank) 130 that stores fuel supplied to the prime mover 91.

[0015] The prime mover 91 is mounted at the center in the width direction at the rear part of the machine body 2. The prime mover 91 is disposed below the driver's cab 6. On both the left and right sides of the prime mover 91, a radiator 92, an oil cooler 93, a hydraulic pump 95, and a cooling fan 100 are arranged.

[0016] The right part of the exterior cover 14 extends forward so as to protrude forward near the right front end of the machine body 2. Inside the right part of the exterior cover 14, a fuel tank 130 and a hydraulic oil tank 150 are arranged. On the outer surface of the right part of the exterior cover 14, a door 154 with a locking function that enables access to the fuel tank 130 during refueling or the like is provided.

[0017] Fuel such as light oil or gasoline is stored (reserved) in the fuel tank 130. As shown in FIG. 4, the fuel tank 130 is arranged on the slewing base plate 5 that is a part of the machine body 2. Details will be described later, but in the present embodiment, the fuel tank 130 is fixed while being supported by the slewing base plate 5.

[0018] As shown in Figure 5, the fuel tank 130 includes a tank body 131 for containing liquid and a cylindrical portion 132 that protrudes in a direction inclined with respect to the outer surface 131a of the tank body 131. Assuming that the fuel tank 130 includes the tank body 131 and the cylindrical portion 132, the work machine 1 includes, as means for fixing the fuel tank 130, a fixing piece 133 having a through hole 149 through which the cylindrical portion 132 is inserted and fixing the fuel tank 130 to the machine body 2, and an elastic member 145 sandwiched between the fixing piece 133 and the cylindrical portion 132.

[0019] First, the fuel tank 130 will be described in detail. As shown in Figure 4, the fuel tank 130 is positioned with the outer surface 131a of the tank body 131 facing upwards. The tank body 131 is formed so that one direction is longitudinal. In this embodiment, the tank body 131 is positioned with one direction being longitudinal. That is, the tank body 131 is a vertically elongated container for holding liquid and is formed using synthetic resin or the like. The inside of the tank body 131 is hollow and contains liquid fuel. The tank body 131 is positioned upright on the rotating base plate 5. As shown in Figure 6, the outer surface of the tank body 131 includes a flat surface 131a on one side in one direction. That is, the upper surface, which is one side of the outer surface of the tank body 131 in the vertical direction, includes a flat surface 131a.

[0020] The cylindrical portion 132 has one end connected to the tank body 131 and the other end forming the liquid inlet 135. As a result, the cylindrical portion 132 protrudes from the outer surface 131a of the tank body 131. In this embodiment, the cylindrical portion 132 protrudes in a direction inclined with respect to the flat portion 131a of the upper surface, which is the outer surface of the tank body 131. Here, in this embodiment, the protruding direction is outward from the machine body 2 with respect to the vertically upward direction.

[0021] In other words, the upper surface of the tank body 131 is the outer surface 131a from which the cylindrical portion 132 protrudes (the outer surface to which the base end of the cylindrical portion 132 is connected). In this embodiment, the upper surface (upward-facing outer surface) of the tank body 131 has varying heights, with the higher portion being the flat portion 131a.

[0022] As shown in Figures 4 to 6, a cylindrical portion 132 protrudes from a flat portion 131a on the higher part of the tank body 131's upper surface, which has varying heights, and liquid level sensors 153 and 134 are provided on the lower portion surrounding the flat portion 131a. The cylindrical portion 132 is positioned offset from the center of the upper surface of the tank body 131. In this embodiment, the cylindrical portion 132 (flat portion 131a) is located approximately in the center of one side of the peripheral wall of the tank body 131. In this embodiment, one side of the peripheral wall of the tank body 131 is located in the backward direction of the traveling device 3, and accordingly, the cylindrical portion 132 (flat portion 131a) is located in the left-right center of the rear of the upper surface. Accordingly, the liquid level sensor 153 is positioned at the front of the upper surface of the tank body 131 (in front of the cylindrical portion 132), and the liquid level sensor 134 is positioned at the side of the upper surface of the tank body 131 (beside the cylindrical portion 132: to the left in this embodiment). In this embodiment, the liquid level sensor 153 uses a float to detect the liquid level inside the tank body 131 and displays the amount of oil in the tank using a needle that moves in conjunction with the float. The liquid level sensor 134 detects the liquid level inside the tank and sends a signal corresponding to the detection result to a control device (not shown). As a result, the amount of oil corresponding to the detection result of the liquid level sensor 134 is displayed on the meter panel (not shown).

[0023] To describe the cylindrical portion 132 in more detail, as shown in Figures 5 and 6, the cylindrical portion 132 has one end connected to the tank body 131, a middle section extending diagonally upward from the one end, and the other end forming a liquid inlet (fuel inlet) 135 that opens diagonally upward. The opening centerline Lc, which is a straight line passing through the center of the liquid inlet 135 and perpendicular to the opening end face of the liquid inlet 135 (the other end face, a virtual plane including the other end of the cylindrical portion 132), is inclined outward from the machine (to the right and slightly forward in this embodiment) with respect to the direction perpendicular to the outer surface 131a of the tank body 131 (the vertical direction in this embodiment). That is, the opening centerline Lc extends diagonally upward along the inclination direction of the cylindrical portion 132 (the extension direction of the middle section). In this embodiment, an elastic member 145 is fitted onto the outer circumferential surface of the cylindrical portion 132. The elastic member 145 abuts (closely contacts) a predetermined region (contact region 132c) on the outer circumferential surface of the cylindrical portion 132. As shown in Figure 6, the contact region 132c is the region between the lower limit position (position of the lower end of the fitted elastic member 145) DB on one end of the cylindrical portion 132 and the upper limit position (position of the upper end of the fitted elastic member 145) UB on the other end of the cylindrical portion 132. The contact region 132c of the cylindrical portion 132 has a lower limit position DB at one end of the cylindrical portion 132, and an upper limit position UB at a position separated from the lower limit position DB by the thickness of the elastic member 145. The cylindrical portion 132 is positioned such that the portion of the cylindrical portion 132 on the other end side of the contact region 132c is projectively contained within the range of the closed curve formed by the contact region 132c when viewed from a direction perpendicular to the outer surface 131a. Here, "the closed curve formed by the contact region 132c" means the contour of the contact region 132c when viewed from a direction perpendicular to the outer surface (planar portion) 131a. In this embodiment, the liquid supply port 135 is positioned such that it is projectively contained within the range of the annular contour (closed curve) of the outer circumference of the cylindrical portion 132 at the upper limit position UB of the contact region 132c when viewed from a direction perpendicular to the outer surface (planar portion) 131a.

[0024] In the cylindrical portion 132, the angle between the outer surface of the cylindrical portion 132 and the outer surface 131a in a cross-section perpendicular to the outer surface 131a and passing through the center of the cylindrical portion 132 at one end is 90° or more at any position in the circumferential direction of the cylindrical portion 132. In the cylindrical portion 132, the inclination of the outer surface of the cylindrical portion 132 with respect to the outer surface 131a is at an angle of 90° or more at any position in the circumferential direction.

[0025] As shown in Figure 6, the cylindrical portion 132 expands from the other end (upper end) towards the one end (lower end). That is, the cylindrical portion 132 includes an expanded portion 136 whose cross-sectional shape expands from the other end towards the one end. In this embodiment, the cylindrical portion 132 includes an expanded portion 136 that protrudes from the tank body 131 and expands toward the tank body 131, and a cylindrical portion 137 that is continuous with the tip of the expanded portion 136 and constitutes the liquid inlet 135. Before explaining the angle between the outer circumferential surface and the outer surface 131a of the cylindrical portion 132 (enlarged portion 136) using Figures 5 and 6, we will first explain the points O and P1-P4 used in the explanation. As shown in Figure 6, point O is the intersection of a virtual plane passing through the lower limit position DB of the contact region 132c and the opening center line Lc. Points P1-P4 are positions (points) on the virtual plane passing through the lower limit position DB of the contact region 132c and are located around point O. That is, points P1-P4 are located on the contour line H of the lower limit position DB, which is shown as a dashed line in Figure 5. P1 is located in front of and outward from point O (towards the protruding direction of the cylindrical portion 132), P3 is located in rearward and inward from point O (opposite to the protruding direction of the cylindrical portion 132), and P2 and P4 are located in directions perpendicular to the virtual line connecting P1 and P3 from point O. The projection line L0 shown by the dashed line in Figure 5 is a straight line projected from above onto the opening center line Lc, and extends through points O, P1, and P3. The projection line L0 is inclined at an angle θ1 with respect to the right direction X and at an angle θ2 with respect to the forward direction Y. In this embodiment, the angle θ1 is 45° and the angle θ2 is 45°.

[0026] The enlarged portion 136 (cylindrical portion 132) has a first portion 132a and a second portion 132b connecting both ends of the first portion 132a in the circumferential direction.

[0027] The first portion 132a is formed over the circumferential direction towards the rear inward side of the cross-sectional shape of the cylindrical portion 132. As shown in Figure 5, in this embodiment, the first portion 132a is formed over half the circumference of the cylindrical portion 132 from P4 through P3 to P2. The first portion 132a is formed in a shape (approximately a semi-frustoconical shape) that expands outward from the center of the cross-sectional shape of the cylindrical portion 132 (the position indicated by point O) as it approaches the tank body 131.

[0028] The second portion 132b is formed over the circumferential direction of the front outer side of the cross-sectional shape of the cylindrical portion 132. In this embodiment, the second portion 132b is formed over half the circumference of the cylindrical portion 132 from P2 through P1 to P4. The second portion 132b is formed to be a cylindrical surface around an axis extending from point O on the outer surface 131a of the tank body 131 in a direction perpendicular to the outer surface 131a.

[0029] As shown in Figure 6, the outer surface of the first portion 132a is at an angle greater than 90° with respect to the flat portion 131a of the tank body 131 at any position in the circumferential direction, and the outer surface of the second portion 132b is at an angle of 90° with respect to the flat portion 131a of the tank body 131 at any position in the circumferential direction. In other words, in this embodiment, the cylindrical portion 132 is formed such that the first portion 132a is approximately in the shape of a semi-frustoconical pyramid, and the second portion 132b is formed in the shape of a semi-cylindrical pyramid. As a result, the outer surface of the first portion 132a is a semi-conical surface, and the outer surface of the second portion 132b is a semi-conical surface.

[0030] The cylindrical portion 137 is the part of the cylindrical portion 132 where the outer diameter is the same from one end (upper end) to the other end (lower end). The cylindrical portion 137 is provided continuously above the upper end (tip) of the enlarged portion 136, that is, on the upper part of the cylindrical portion 132. An opening is formed at the upper end of the cylindrical portion 137, and this opening constitutes a liquid inlet 135 for supplying liquid into the tank body 131. Therefore, the inner diameter of the cylindrical portion 137 matches the opening diameter of the liquid inlet 135.

[0031] A male threaded portion 139 is formed on the outer circumferential surface of the cylindrical portion 137. The male threaded portion 139 is screwed into the female threaded portion 141 of the cap 140. In other words, the cylindrical portion 137 is configured to allow the cap 140 to be screwed onto it.

[0032] The outer diameter of the cylindrical portion 137 is smaller than the outer diameter of the tip of the enlarged portion 136 (the reduced-diameter tip).

[0033] Specifically, since the second portion 132b of the enlarged portion 136 is at a 90° angle to the flat portion 131a of the tank body 131, if the cylindrical portion 137 is connected to the enlarged portion 136 such that the liquid inlet 135 faces diagonally upward, the liquid inlet 135 will be located outside the second portion 132b.

[0034] In this embodiment, the outer diameter of the cylindrical portion 137 is set to be smaller than the outer diameter of the tip of the enlarged portion 136 so that the liquid inlet 135 is projected to fall within the range of the closed curve formed by the contact area 132c of the cylindrical portion 132 when viewed from a direction perpendicular to the outer surface (flat portion) 131a. Note that the cap 140 does not necessarily have to be projected to fall within the range of the closed curve when viewed from a direction perpendicular to the outer surface (flat portion) 131a.

[0035] Accordingly, a stepped portion 144 is formed between the cylindrical portion 137 and the enlarged portion 136, which increases the diameter from the cylindrical portion 137 to the enlarged portion 136.

[0036] As shown in Figure 8, the cap 140 is formed in a covered cylindrical shape that seals the liquid inlet 135. In this embodiment, the inner circumference of the cap 140 has a female threaded portion 141 that screws onto a male threaded portion 139 formed on the outer circumference of the cylindrical portion 137. This makes the cap 140 capable of being screwed onto the cylindrical portion 137 of the cylindrical portion 132.

[0037] A dome-shaped encasing 142 is formed on the inner circumference (underside of the lid) of the cap 140. The encasing 142 is made of an elastic material such as rubber and is inserted into the cylindrical portion 137 to seal the inside of the cylindrical portion 137.

[0038] As shown in Figure 6, the work machine 1 includes a cylindrical strainer 143 inserted into the cylindrical portion 132, the strainer 143 being inserted concentrically or approximately concentrically with the opening centerline Lc of the liquid inlet 135. The strainer 143 removes impurities contained in the fuel supplied to the fuel tank. As shown in Figures 6 and 7, the strainer 143 is formed in a cylindrical shape that is sized to be inserted into the cylindrical portion 132. That is, the outer diameter of the strainer 143 is slightly smaller than the opening diameter of the liquid inlet 135, allowing it to be inserted into the cylindrical portion 132. One end of the strainer 143 is sandwiched between the cap 140 and the cylindrical portion 137, and in this state, it is configured to be concentric or approximately concentric with the opening centerline Lc of the liquid inlet 135. As shown in Figure 7, an opening 143a is formed at the top of the strainer 143. The opening 143a is provided with a strainer packing 155 that tightly seals the strainer 143 against the liquid inlet 135. The outer circumference of the strainer 143 is provided with a mesh 156 that filters out impurities from the fuel.

[0039] The fuel tank 130 is as described above and is fixed to the aircraft body 2. As described above, the work machine 1 includes a fixing piece 133 and an elastic member 145 as means for fixing the fuel tank 130 to the aircraft body 2, as shown in Figures 9 and 10.

[0040] The fixing piece 133 is fitted onto the outer surface 131a of the tank body 131, substantially parallel to the elastic member 145 fitted onto the cylindrical portion 132, and is fixed to the machine body 2. By fixing the fixing piece 133 to the machine body 2, the tank 130 is fixed to the machine body 2. More specifically, the fixing piece 133 has a first piece 133a and a second piece 133b connected to the first piece 133a.

[0041] The first piece 133a is formed in a plate shape and is configured to be superimposed on the outer surface (flat portion) 131a of the tank body 131.

[0042] A through hole 149 is formed in the center of the first piece 133a into which the cylindrical portion 132 can be inserted. In this embodiment, the through hole 149 is formed so that the cylindrical portion 132 (cylindrical portion 137) of the fuel tank 130 can be loosely fitted. That is, the opening diameter of the through hole 149 is set so that there is a gap between it and the periphery of the inserted cylindrical portion 132 (cylindrical portion 137).

[0043] The second piece 133b is connected to one end of the first piece 133a and extends in a direction perpendicular to the first piece 133a. Fixing holes 152 for fixing the fasteners 151 are drilled at both ends of the second piece 133b. The second piece 133b is fixed directly or indirectly to the machine body 2 via the fasteners (screw members) 151 inserted into the fixing holes 152 of the second piece 133b. In this embodiment, the fixing piece 133 is fixed to the upper surface (flat portion) 131a of the fuel tank 130 (tank body 131) located on the machine body 2 (rotating base plate 5) at a position where the first piece 133a overlaps it. In this embodiment, the fixing piece 133 is fixed to the upper surface of the hydraulic oil tank 150 fixed to the machine body 2 and is indirectly fixed to the machine body 2.

[0044] The elastic member 145 is molded from an elastic material such as rubber and, by fixing the fuel tank 130 to the machine body 2 (work machine 1), mitigates the impact acting on the fuel tank 130.

[0045] The elastic member 145 is fitted onto the cylindrical portion 132 in a manner that is substantially parallel to the outer surface 131a of the tank body 131 and not perpendicular to the protruding direction of the cylindrical portion 132. That is, the elastic member 145 is formed in an annular shape and is configured to be fitted onto the cylindrical portion 132 of the fuel tank 130. The inner circumferential surface of the elastic member 145 is shaped to closely contact an annular contact region 132c on the outer circumferential surface of the cylindrical portion 132, which is substantially parallel to the outer surface 131a of the tank body 131 and not perpendicular to the protruding direction of the cylindrical portion 132. In other words, the inner circumferential surface of the elastic member 145 is formed in accordance with the outer circumferential surface of the cylindrical portion 132 and can closely contact the outer circumferential surface of the cylindrical portion 132. In this embodiment, the elastic member 145 is fitted onto the enlarged portion 136 of the cylindrical portion 132. Accordingly, the elastic member 145 has a through hole into which the enlarged portion 136 is fitted. The inner circumferential shape of this through hole is formed in accordance with the outer circumferential shape of the enlarged portion 136 of the cylindrical portion 132. As a result, in the elastic member 145, the inner circumferential surface 145c defining the through hole can closely contact the outer surface of the enlarged portion 136 of the cylindrical portion 132 over its entire circumference.

[0046] The elastic member 145 has a flange portion 147 that is sandwiched between the outer surface (flat portion 131a) of the tank body 131 and the fixing piece 133 (first piece 133a). The elastic member 145 also has an annular projection 148 that extends from the flange portion 147 and is sandwiched between the cylindrical portion 132 (enlarged portion 136) and the inner circumferential surface of the through hole 149 of the fixing piece 133.

[0047] The flange portion 147 and the annular projection portion 148 are integrally molded. The through hole in the elastic member 145 is formed by the inner holes of the flange portion 147 and the annular projection portion 148. That is, the inner holes of the flange portion 147 and the annular projection portion 148 continuously form the through hole in the elastic member 145. Accordingly, the inner circumferential surface that abuts against the contact area included in the outer circumferential surface of the cylindrical portion 132 is formed by the continuity of the inner circumferential surface of the flange portion 147 and the inner circumferential surface of the annular projection portion 148. The thickness of the flange portion 147 is set so that it is compressed and sandwiched between the first piece 133a of the fixing piece 133 fixed to the aircraft body 2 and the flat portion 131a of the fuel tank 130 supported by the aircraft body 2. In contrast, the annular projection portion 148 is positioned in the gap between the inner circumferential surface of the through hole 149 of the fixing piece 133 and the cylindrical portion 132 (enlarged portion 136). The thickness of the annular projection 148 is set so that it is compressed between the inner circumferential surface of the through hole 149 of the fixing piece 133 and the cylindrical portion 132 (enlarged portion 136). As a result, the elastic member 145 (annular projection 148) fills the gap between the inner circumferential surface of the through hole 149 of the fixing piece 133 and the cylindrical portion 132 (enlarged portion 136), restricting the lateral swaying of the fuel tank 130 (cylindrical portion 132) while absorbing lateral impacts acting on the fuel tank 130.

[0048] A portion of the annular projection 148 protrudes from the fixing piece 133 towards the other end of the cylindrical portion 132 when the fixing piece 133 is fitted onto the annular projection 148. In other words, the annular projection 148 is also formed to protrude outward from the first piece 133a of the fixing piece 133. Specifically, the upper end of the annular projection 148 protrudes further upward from the fixing piece 133. When the upper end of the annular projection 148 protrudes upward from the fixing piece 133 in this way, the upper end of the annular projection 148 that protrudes upward from the fixing piece 133 bulges due to the elastic force of the elastic material. The bulging annular projection 148 prevents the elastic member 145 from coming out downward from the through hole 149 of the fixing piece 133. As a result, in the elastic member 145 of this embodiment, the elastic member 145 sandwiched between the outer surface 131a of the tank body 131 and the fixing piece 133 is less likely to come out.

[0049] Next, the procedure for assembling the elastic member 145 and the fixing piece 133 to the cylindrical portion 132 will be explained using Figures 11 to 14.

[0050] As shown in Figure 11, the elastic member 145 is brought towards the cylindrical portion 132 from the annular projection 148 side in a direction perpendicular to the outer surface (flat portion) 131a of the tank body 131. The opening diameter of the elastic member 145 on the annular projection 148 side is equal to or slightly smaller than the outer diameter of the lower end (one end) of the cylindrical portion 132 (the outer diameter of the lower end of the enlarged portion 136). Therefore, the other end of the cylindrical portion 132, which has a smaller diameter than the one end, can be easily inserted into the opening on the annular projection 148 side, which has a larger opening diameter. In addition, since the liquid inlet 135 is positioned so that it is projectively contained within the range of the closed curve formed by the contact area 132c of the cylindrical portion 132 when viewed from a direction perpendicular to the flat portion 131a of the tank body 131, the elastic member 145 can be easily guided to the one end of the cylindrical portion 132 by moving the elastic member 145 straight from a direction perpendicular to the flat portion 131a. Furthermore, since the inner circumferential surface 145c of the elastic member 145 is formed in accordance with the outer circumferential surface (outer circumferential surface near the lower end) of the cylindrical portion 132, when the elastic member 145 is brought close enough to contact the outer surface 131a of the tank body 131, the inner circumferential surface 145c of the elastic member 145 comes into close contact with the outer circumferential surface of the cylindrical portion 132.

[0051] Then, as shown in Figure 12, the fixing piece 133 is brought close to the elastic member 145 which is in close contact with the outer surface (flat portion) 131a of the tank body 131 (from above), and the cylindrical portion 132 and the annular projection 148 are inserted (press-fitted) into the through hole 149 of the first piece 133a of the fixing piece 133. At the same time, the elastic member 145 (flange portion 147) is sandwiched between the first piece 133a of the fixing piece 133 and the outer surface of the cylindrical portion 132.

[0052] As shown in Figure 13, once the elastic member 145 is sandwiched between the first piece 133a of the fixing piece 133 and the outer surface of the cylindrical portion 132, the fixing device 151 is inserted into the fixing hole 152 of the second piece 133b of the fixing piece 133, and the fixing piece 133 is fixed to the machine body 2 (in this embodiment, the upper surface of the hydraulic oil tank 150 fixed to the machine body 2) as shown in Figure 14.

[0053] In this way, the elastic member 145 and the fixing piece 133 can be assembled while moving them along a direction perpendicular to the outer surface 131a of the tank body 131.

[0054] As described above, the work machine 1 according to the above embodiment comprises a machine body 2, a tank 130 including a tank body 131 for containing liquid, a cylindrical portion 132 protruding from the outer surface 131a of the tank body 131 in a protruding direction inclined with respect to the outer surface 131a, a fixing piece 133 having a through hole 149 through which the cylindrical portion 132 is inserted and fixing the tank 130 to the machine body 2, and an elastic member 145 sandwiched between the fixing piece 133 and the cylindrical portion 132. The cylindrical portion 132 has one end connected to the tank body 131 and the other end forming a liquid supply port 135. The elastic member 145 is fitted onto the cylindrical portion 132 in a state that is substantially parallel to the outer surface 131a and not perpendicular to the protruding direction of the cylindrical portion 132. The fixing piece 133 is fitted onto the elastic member 145 fitted onto the cylindrical portion 132 in a state that is substantially parallel to the outer surface 131a and is fixed to the machine body 2.

[0055] With the above configuration, the elastic member 145 and the fixing piece 133 can be assembled to the cylindrical portion 132 that protrudes in an inclined direction from the outer surface 131a of the tank body 131 in a manner substantially parallel to the outer surface 131a of the tank body 131. Therefore, the tank 130, which has a cylindrical portion 132 that protrudes in an inclined direction from the tank body 131, can be easily fixed to the aircraft body 2.

[0056] The inner circumferential surface 145c of the elastic member 145 is shaped to be in close contact with an annular contact region 132c on the outer circumferential surface of the cylindrical portion 132 that is substantially parallel to the outer surface 131a and not perpendicular to the protruding direction of the cylindrical portion 132. With this configuration, the elastic member 145 can be assembled simply by fitting it onto the cylindrical portion 132. Furthermore, the close contact between the inner circumferential surface 145c of the elastic member 145 and the contact region 132c included in the outer circumferential surface of the cylindrical portion 132 allows the tank 130 to be stably fixed.

[0057] The cylindrical portion 132 is positioned such that the portion of the cylindrical portion 132 on the other end side of the contact region 132c is projectively contained within the range of the closed curve formed by the contact region 132c when viewed from a direction perpendicular to the outer surface 131a. With this configuration, the elastic member 145 can be easily assembled (fitted) to the cylindrical portion 132 simply by bringing the elastic member 145 straight towards the outer surface 131a of the tank body 131 in a direction perpendicular to it. Furthermore, in a cross-section perpendicular to the outer surface 131a and passing through the center of the cylindrical portion 132 at one end, the angle between the outer surface of the cylindrical portion 132 and the outer surface 131a is 90° or more at any position in the circumferential direction of the cylindrical portion 132. With the above configuration, the elastic member 145 can be positioned to approach the outer surface 131a of the tank body 131 in a direction perpendicular to it, and the elastic member 145 can be easily incorporated into the cylindrical portion 132.

[0058] The work machine 1 comprises a machine body 2, a tank 130 including a tank body 131 for containing liquid, a cylindrical portion 132 protruding from the outer surface 131a of the tank body 131 in a direction inclined with respect to the outer surface 131a, a fixing piece 133 having a through hole 149 through which the cylindrical portion 132 is inserted and fixing the tank 130 to the machine body 2, and an elastic member 145 sandwiched between the fixing piece 133 and the cylindrical portion 132. The cylindrical portion 132 has one end connected to the tank body 131 and the other end forming a liquid inlet 135. In a cross-section perpendicular to the outer surface 131a and passing through the center of the cylindrical portion 132 at the one end, the angle between the outer surface of the cylindrical portion 132 and the outer surface 131a is 90° or more at any position in the circumferential direction of the cylindrical portion 132. With the above configuration, the elastic member 145 can be positioned to approach the outer surface 131a of the tank body 131 in a direction perpendicular to it, and the elastic member 145 can be easily incorporated into the cylindrical portion 132.

[0059] The elastic member 145 has a flange portion 147 that is sandwiched between the outer surface 131a and the fixing piece 133. With the above configuration, since the flange portion 147 is positioned between the outer surface 131a of the tank body 131 and the fixing piece 133, the elastic member 145 properly presses against the tank body 131, and the tank 130 can be securely fixed.

[0060] The elastic member 145 is an annular projection 148 extending from the flange portion 147, and has an annular projection 148 that is sandwiched between the cylindrical portion 132 and the inner circumferential surface of the through hole 149 within the through hole 149. With the above configuration, as described above, the flange portion 147 is positioned between the outer surface 131a of the tank body 131 and the fixing piece 133, and the annular projection 148 is sandwiched between the cylindrical portion 132 and the inner circumferential surface of the through hole 149, thereby restricting the lateral movement of the cylindrical portion 132 (rattling in a direction perpendicular to the center line of the through hole 149). Furthermore, a portion of the annular projection 148 protrudes from the fixing piece 133 toward the other end when the fixing piece 133 is fitted onto the annular projection 148. As a result, the portion of the annular projection 148 that protrudes from the fixing piece 133 expands due to the elastic force of the elastic member 145, thereby preventing the elastic member 145 from coming out of the through hole 149 of the fixing piece 133.

[0061] The tank 130 is positioned with its outer surface 131a facing upward. With the above configuration, the elastic member 145 and the fixing piece 133 can be easily assembled by bringing them up to the top surface (outer surface 131a) of the tank 130 from above.

[0062] The cylindrical portion 132 includes an enlarged portion 136 whose cross-sectional shape expands from the other end to the one end, and the elastic member 145 is fitted onto the enlarged portion 136. With the above configuration, the elastic member 145 can be easily assembled to the enlarged portion 136 whose cross-sectional shape expands from the other end to the one end.

[0063] The aforementioned protruding direction is inclined outward from the machine body 2 with respect to the vertically upward direction. With this configuration, access to the liquid supply port 135 from the outside of the work machine 1 becomes easier.

[0064] Tank 130 is a fuel tank that stores fuel supplied to the prime mover 91 installed in the work machine 1. With the above configuration, daily refueling operations can be carried out smoothly.

[0065] While embodiments of the present invention have been described above, the embodiments disclosed herein should be considered in all respects to be illustrative and not restrictive. The scope of the present invention is indicated by the claims rather than by the foregoing description, and all modifications within the meaning and scope of equivalence to the claims are intended to be included.

[0066] In the above embodiment, an example was given in which the tank of the present invention was applied to a fuel tank 130. However, the tank of the present invention may also be applied to a hydraulic oil tank 150, or to other tanks provided on the work machine 1.

[0067] In the above embodiment, the first portion 132a is formed over half the circumference of the cylindrical portion 132, and the second portion 132b is formed over the remaining half the circumference of the cylindrical portion 132, but the embodiment is not limited to this. That is, the area over which the first portion 132a and the second portion 132b are provided is not limited to half the circumference. For example, the first portion 132a and the second portion 132b may be provided over an area narrower than half the circumference in the circumferential direction. Alternatively, the first portion 132a and the second portion 132b may be provided over an area wider than half the circumference in the circumferential direction.

[0068] In the above embodiment, the first portion 132a is formed in a substantially semi-frustoconical shape that expands outward from point O as it approaches the tank body 131, and the second portion 132b is formed in a semi-cylindrical shape around an axis extending perpendicular to the outer surface 131a, but the embodiment is not limited to this. For example, both the first portion 132a and the second portion 132b may be formed in a substantially semi-frustoconical shape that expands outward from point O as it approaches the tank body 131, and the entire cylindrical portion 132 (expanded portion 136) may be formed in a frustoconical shape.

[0069] In the above embodiment, the cylindrical portion 132 includes an enlarged portion 136 and a cylindrical portion 137, and the cylindrical portion 132 expands from one end to the other as the enlarged portion 136 expands toward the tank body 131, but it is not limited to this. For example, if the cap 140 that seals the liquid inlet 135 is of the snap-fit ​​type, the cylindrical portion 132 may consist only of the enlarged portion 136. That is, in the above embodiment, only the enlarged portion 136 may be the cylindrical portion 132. In this case, it goes without saying that the tip opening of the enlarged portion 136 constitutes the liquid inlet 135 that faces diagonally upward. Furthermore, it goes without saying that the explanation of the cylindrical portion 132 in this case can be understood by substituting the enlarged portion 136 with the cylindrical portion 132 in the explanation of the above embodiment.

[0070] Although not specifically mentioned in the above embodiment, the elastic member 145 (flange portion 147) is not limited to being sandwiched between the outer surface (flat portion) 131a of the tank body 131 and the fixing piece 133 (first piece 133a) around its entire circumference. The elastic member 145 (flange portion 147) may be partially sandwiched between the outer surface (flat portion) 131a of the tank body 131 and the fixing piece 133 (first piece 133a). Furthermore, the elastic member 145 is not limited to having an annular projection 148. That is, the elastic member 145 may have only the portion corresponding to the flange portion 147 in the above embodiment. However, to protect the tank 130 from lateral shaking and lateral impact, it is preferable to have an annular projection 148, as in the above embodiment. Furthermore, in this embodiment, a configuration has been described in which the flange portion 147 of the elastic member 145 fitted onto the contact region 132c of the cylindrical portion 132 is sandwiched between the outer surface 131a of the tank body 131 and the fixing piece 133, but the embodiment is not limited to this. For example, the elastic member 145 fitted onto the contact region 132c of the cylindrical portion 132 may be sandwiched between the fixing piece 133 and the outer circumferential surface of the cylindrical portion 132 while being spaced apart from the outer surface 131a of the tank body 131. In this case, the elastic member 145 may not have a flange portion 147.

[0071] In the above embodiment, a backhoe was described as the work machine 1, but it is not limited to this. For example, the work machine 1 may be any type of construction machine other than a backhoe, or any type of agricultural machine such as a tractor or combine harvester. [Explanation of Symbols]

[0072] 1. Work machine 2 units 91 Engine 130 Tank (Fuel Tank) 131 Tank body 131a Outer surface of the tank body 132 Cylindrical part 132a Part 1 132b Part 2 133 Fixed piece 135. Fuel inlet (fuel inlet) 136 Enlarged section 137 Cylindrical section 140 caps 143 Strainer 145 Elastic members 147 Tsuba (guard) 148 Annular protrusion 149 Through hole Lc aperture center line

Claims

1. The aircraft and, A tank comprising a tank body for containing liquid, and a cylindrical portion having an inclined portion that protrudes in a direction inclined vertically upward from the outer surface which is the upper surface of the tank body, and a non-inclined portion that protrudes vertically upward from the outer surface, A fixing piece having a through hole through which the cylindrical portion is inserted, and which secures the tank to the machine body, The system comprises an elastic member sandwiched between the fixing piece and the cylindrical portion, The cylindrical portion has one end connected to the tank body and the other end forming a liquid inlet. The elastic member is fitted onto the cylindrical portion such that its lower surface is substantially parallel to the outer surface and not perpendicular to the inclined portion of the cylindrical portion, and the inner circumferential surface of the elastic member has an inclined inner circumferential surface parallel to the inclined portion and a non-inclined inner circumferential surface parallel to the non-inclined portion. The fixing piece is fitted onto the elastic member fitted onto the cylindrical portion, substantially parallel to its outer surface, and is fixed to the machine body.

2. The outer circumferential surface of the cylindrical portion has a contact area that contacts the inner circumferential surface of the elastic member, The work machine according to claim 1, wherein the contact area includes a region that contacts the inclined inner circumferential surface and a region that contacts the non-inclined inner circumferential surface.

3. The work machine according to claim 2, wherein the cylindrical portion is arranged such that the portion of the cylindrical portion on the other end side of the contact region is projectively contained within the range of the closed curve formed by the contact region when viewed from a direction perpendicular to the outer surface.

4. The work machine according to claim 1, wherein the cylindrical portion is such that the angle between the outer surface of the cylindrical portion and the outer surface in a cross section perpendicular to the outer surface and passing through the center of the cylindrical portion at one end is 90° or more at any position in the circumferential direction of the cylindrical portion.

5. The work machine according to claim 1, wherein the elastic member has a flange portion that is sandwiched between the outer surface and the fixing piece.

6. The work machine according to claim 5, wherein the elastic member is an annular projection extending from the flange portion, and the annular projection is sandwiched between the cylindrical portion and the inner circumferential surface of the through hole within the through hole.

7. The work machine according to claim 6, wherein a part of the annular projection protrudes from the fixing piece toward the other end when the fixing piece is fitted onto the annular projection.

8. The work machine according to claim 1, wherein the tank is arranged with its outer surface facing upward.

9. The cylindrical portion includes an enlarged portion whose cross-sectional shape expands from the other end to the one end, The work machine according to claim 1, wherein the elastic member is fitted onto the enlarged portion.

10. The work machine according to claim 1, wherein the protruding direction is inclined outward with respect to the vertically upward direction.

11. The work machine according to claim 1, wherein the tank is a fuel tank for storing fuel to be supplied to the prime mover provided in the work machine.

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