Work machine

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 liquid such as fuel. [Background technology]

[0002] A conventional working machine is disclosed in Patent Document 1. The working machine disclosed in Patent Document 1 includes a fuel tank that stores fuel to be supplied to a prime mover. The fuel tank is provided with a cylindrical portion that protrudes obliquely upward from the outer surface of the tank, and a fuel filler port is provided at the tip of the cylindrical portion. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2021-185306 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the technology of Patent Document 1, the cylindrical portion is provided at an angle, which causes a problem of poor workability when fixing the cylindrical portion to the machine body. For example, if a plane perpendicular to the protruding direction of the cylindrical body and an attachment surface of a member for fixing the cylindrical portion to the machine body are not parallel to each other, it is time-consuming to insert the member into the cylindrical portion or to position the member in a state not perpendicular to the protruding direction relative to the cylindrical portion.

[0005] In view of the above problems, the present invention has an object to easily fix a tank having a cylindrical portion protruding in an oblique direction from the tank body to an aircraft body. [Means for solving the problem]

[0006] The working machine of the present invention comprises a body, a tank including a tank body for containing a liquid and a cylindrical portion protruding from the outer surface of the tank body in a protruding direction inclined relative to the outer surface, a fixing piece having a through hole through which the cylindrical portion is inserted and fixing the tank to the body, and an elastic member sandwiched between the fixing piece and the tubular portion, the cylindrical portion having one end connected to the tank body and the other end constituting a liquid supply port, the elastic member being fitted onto the cylindrical portion in a state approximately parallel to the outer surface and non-perpendicular to the protruding direction of the tubular portion, and the fixing piece being fitted onto the elastic member fitted onto the cylindrical portion approximately parallel to the outer surface and fixed to the body. Effect of the Invention

[0007] According to the present invention, a tank having a cylindrical portion protruding in an oblique direction from the tank body can be easily fixed to the aircraft body. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is an overall side view of a working machine according to an embodiment of the present invention, as viewed from the right. [Diagram 2] FIG. 2 is an overall perspective view of the working machine according to the embodiment, as viewed from the right. [Diagram 3] FIG. 3 is a plan view of the body of the work machine according to the embodiment. [Figure 4] FIG. 4 is a perspective view showing a mounting structure of a tank to a swivel base plate of the working machine according to the embodiment. [Diagram 5] FIG. 5 is a plan view of the tank of the work machine according to the embodiment, as viewed from above. [Figure 6] FIG. 6 is a partial cross-sectional view taken along the line VI-VI of FIG. [Figure 7] FIG. 7 is a vertical cross-sectional view of the strainer of the working machine according to the embodiment. [Figure 8] FIG. 8 is a vertical cross-sectional view of the cap of the working machine according to the embodiment. [Figure 9] FIG. 9 is an exploded perspective view of the periphery of the cylindrical portion of the working machine according to the embodiment. [Figure 10] FIG. 10 is a partial cross-sectional view taken along line VII-VII of FIG. [Figure 11] FIG. 11 is an explanatory diagram of a procedure for attaching the elastic member and the fixing piece to the cylindrical portion. [Figure 12] FIG. 12 is an explanatory diagram of a procedure for attaching the elastic member and the fixing piece to the cylindrical portion. [Figure 13] FIG. 13 is an explanatory diagram of a procedure for attaching the elastic member and the fixing piece to the cylindrical portion. [Figure 14] FIG. 14 is an explanatory diagram of a procedure for attaching the elastic member and the fixing piece to the cylindrical portion. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[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 a working machine 1 according to this embodiment. Fig. 2 is a perspective view showing the overall configuration of a working machine 1 according to this embodiment. In this embodiment, the direction of arrow A1 in Fig. 1 will be described as the front, the direction of arrow A2 in Fig. 1 as the rear, and the direction of arrow A3 in Fig. 1 as the front-rear direction. The front side of Fig. 1 will be described as the right side, and the back side of Fig. 1 as the left side. The horizontal direction perpendicular to the front-rear direction A3 will be described as the width direction.

[0011] 1 and 2, the work machine 1 of this embodiment includes a machine body 2, a traveling device 3 that supports the machine body 2 so that it can travel, a prime mover 91 (see FIG. 3), and a working device 4. The prime mover 91 drives a hydraulic pump 95, which will be described later, and the traveling device 3 and the working device 4 are driven by hydraulic pressure supplied from the hydraulic pump 95.

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

[0013] 2, the machine body 2 includes a frame to which the traveling device 3 is connected, a swivel bearing fixed to the frame, and a swivel base 5 attached rotatably (pivotally) relative to the frame via the swivel bearing, and a driver's seat 6 (cabin), a weight 25, etc. are disposed on the swivel base 5. In this embodiment, the work machine 1 has a cover 14 that covers the prime mover 91, the weight 25, etc. That is, the mounted objects such as the weight 25 are covered by the cover 14 (hereinafter referred to as the exterior cover).

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

[0015] The prime mover 91 is mounted in the widthwise center at the rear of the body 2. The prime mover 91 is disposed below the driver's seat 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 disposed.

[0016] The right part of the exterior cover 14 extends so as to protrude forward up to the vicinity of the right front end of the fuselage 2. A fuel tank 130 and a hydraulic oil tank 150 are disposed inside the right part of the exterior cover 14. A door 154 with a locking function is provided on the outer surface of the right part of the exterior cover 14, allowing access to the fuel tank 130 during refueling, etc.

[0017] Fuel such as diesel or gasoline is contained (stored) in the fuel tank 130. As shown in Fig. 4, the fuel tank 130 is disposed on the rotating base 5, which is a part of the fuselage 2. Although details will be described later, in this embodiment, the fuel tank 130 is fixed in a state in which it is supported by the rotating base 5.

[0018] 5, the fuel tank 130 includes a tank body 131 that contains liquid, and a cylindrical portion 132 that protrudes in a protruding direction that is inclined relative to an outer surface 131a of the tank body 131. On the premise that the fuel tank 130 includes the tank body 131 and the cylindrical portion 132, the work machine 1 includes, as a means for fixing the fuel tank 130, a fixing piece 133 that has a through hole 149 through which the cylindrical portion 132 is inserted and that fixes the fuel tank 130 to the machine body 2, and an elastic member 145 that is sandwiched between the fixing piece 133 and the cylindrical portion 132.

[0019] First, the fuel tank 130 will be specifically described. As shown in FIG. 4, the fuel tank 130 is disposed with the outer surface 131a of the tank body 131 facing upward. The tank body 131 is formed so that one direction is longitudinal. In this embodiment, the tank body 131 is disposed so that one direction is vertical. That is, the tank body 131 is a vertically elongated container that contains liquid, and is formed using synthetic resin or the like. The inside of the tank body 131 is hollow, and liquid fuel is contained therein. The tank body 131 is disposed in an upright state on the rotating base plate 5. As shown in FIG. 6, the outer surface of the tank body 131 includes a flat surface portion 131a on one surface in one direction. That is, the outer surface of the tank body 131 includes a flat surface portion 131a on the upper surface, which is one surface in the up-down direction.

[0020] The cylindrical portion 132 has one end connected to the tank body 131 and the other end constituting the liquid supply port 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 protruding direction that is 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 toward the outside of the body 2 in a vertically upward direction.

[0021] That is, the upper surface of the tank body 131 is the "outer surface from which the cylindrical portion 132 protrudes (the outer surface to which the base end of the cylindrical portion 132 is connected)" 131a. In this embodiment, the upper surface (the outer surface facing upward) of the tank body 131 has heights and lows, and the higher parts are the flat surface portions 131a.

[0022] As shown in Figs. 4 to 6, the cylindrical portion 132 protrudes from a flat portion 131a at a higher portion of the upper surface of the tank body 131, and the liquid level sensors 153 and 134 are provided at a lower portion around the flat portion 131a. The cylindrical portion 132 is disposed at a position shifted from the center of the upper surface of the tank body 131. In this embodiment, the cylindrical portion 132 (flat portion 131a) is disposed at approximately the center of one side surface of the peripheral wall of the tank body 131. In this embodiment, one side surface of the peripheral wall of the tank body 131 is disposed in the backward direction of the traveling device 3, and therefore the cylindrical portion 132 (flat portion 131a) is disposed at the center in the left-right direction at the rear of the upper surface. Accordingly, the liquid level sensor 153 is disposed at the front (in front of the cylindrical portion 132) on the upper surface of the tank body 131, and the liquid level sensor 134 is disposed at the side (on the side of the cylindrical portion 132: in this embodiment, on the left side) on the upper surface of the tank body 131. In this embodiment, the liquid level sensor 153 detects the level of the liquid contained inside the tank body 131 using a float, and indicates the amount of oil in the tank with a needle that moves in conjunction with the float. The liquid level sensor 134 detects the liquid level in the tank, and sends a signal according to the detection result to a control device (not shown). As a result, the amount of oil according to the detection result of the liquid level sensor 134 is displayed on a meter panel (not shown).

[0023] 5 and 6, the cylindrical portion 132 has one end connected to the tank body 131, a middle portion extending obliquely upward from the one end, and the other end forming a liquid supply port (fuel supply port) 135 that opens obliquely upward. An opening center line Lc, which is a straight line that passes through the center of the liquid supply port 135 and is perpendicular to the opening end face of the liquid supply port 135 (the other end face, a virtual plane including the end of the other end side of the cylindrical portion 132), is inclined toward the outside of the aircraft (diagonally forward to the right in this embodiment) with respect to a direction perpendicular to the outer surface 131a of the tank body 131 (the vertical direction in this embodiment). That is, the opening center line Lc extends obliquely upward along the inclination direction of the cylindrical portion 132 (the extension direction of the middle portion). In this embodiment, an elastic member 145 is fitted onto the outer circumferential surface of the cylindrical portion 132. The elastic member 145 abuts (comes into close contact with) a predetermined region (abutment region 132c) on the outer circumferential surface of the cylindrical portion 132. The abutment region 132c is a region between a lower limit position DB (the position of the lower end of the elastic member 145 to be fitted) on one end side of the cylindrical portion 132 and an upper limit position UB (the position of the upper end of the elastic member 145 to be fitted) on the other end side of the cylindrical portion 132, as shown in FIG. The contact area 132c of the cylindrical portion 132 has one end at a lower limit position DB, and a position at an upper limit position UB away from the lower limit position DB by the thickness of the elastic member 145. The cylindrical portion 132 is disposed so that a portion of the cylindrical portion 132 on the other end side of the contact area 132c fits within the range of the closed curve formed by the contact area 132c when viewed from a direction perpendicular to the outer surface 131a. Here, the "closed curve formed by the contact area 132c" means the outline of the contact area 132c when viewed from a direction perpendicular to the outer surface (flat surface portion) 131a. In this embodiment, the liquid supply port 135 is disposed so that it fits within the range of the annular outline (closed curve) of the outer periphery of the cylindrical portion 132 at the upper limit position UB of the contact area 132c when viewed from a direction perpendicular to the outer surface (flat surface portion) 131a.

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

[0025] 6, the tubular portion 132 expands from the other end (upper end) side toward one end (lower end). That is, the tubular portion 132 includes an expanding portion 136 whose cross-sectional shape expands from the other end side toward the one end side. In this embodiment, the tubular portion 132 includes the expanding portion 136 that protrudes from the tank body 131 and expands toward the tank body 131, and the cylindrical portion 137 that is continuous with the tip of the expanding portion 136 and constitutes the liquid supply port 135. Prior to describing the angle between the outer peripheral surface of the cylindrical portion 132 (expanded portion 136) and the outer surface 131a with reference to Figs. 5 and 6, points O and P1 to P4 used in the description will be described. As shown in Fig. 6, point O is an intersection point between an imaginary plane passing through the lower limit position DB of the contact region 132c and the opening center line Lc. Points P1 to P4 are positions (points) on an imaginary plane passing through the lower limit position DB of the contact region 132c, and are located around point O. That is, points P1 to P4 are located on the line of the contour H of the lower limit position DB shown by a dashed line in Fig. 5. P1 is located forward and outward from point O (the protruding direction side of the cylindrical portion 132), P3 is located backward and inward from point O (the opposite side to the protruding direction of the cylindrical portion 132), and P2 and P4 are located in a direction perpendicular to the imaginary line connecting P1 and P3 from point O. 5 is a straight line projected from above on the opening center line Lc, and extends through points O, P1, and P3. The projection line L0 is inclined at an inclination angle θ1 with respect to the right direction X and at an inclination angle θ2 with respect to the forward direction Y. In this embodiment, the inclination angle θ1 is 45°, and the inclination angle θ2 is 45°.

[0026] The expanded portion 136 (the cylindrical portion 132) has, in the circumferential direction, 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 toward the rear inner side in the cross-sectional shape of the cylindrical portion 132. As shown in Fig. 5, the first portion 132a in this embodiment is formed over half the circumference from P4 through P3 to P2 of the cylindrical portion 132. The first portion 132a is formed in a shape (approximately a semi-frustum shape) that expands in a direction away from the center (position indicated by point O) of the cross-sectional shape of the cylindrical portion 132 toward the tank body 131.

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

[0029] 6, the outer peripheral surface of the first portion 132a forms an angle of more than 90° with respect to the flat surface portion 131a of the tank body 131 at any position in the circumferential direction, and the outer peripheral surface of the second portion 132b forms an angle of 90° with respect to the flat surface portion 131a of the tank body 131 at any position in the circumferential direction. That is, in the tubular portion 132 of this embodiment, the first portion 132a is formed in a substantially truncated semiconical shape, and the second portion 132b is formed in a semicylindrical shape. As a result, the outer peripheral surface of the first portion 132a is a semiconical surface, and the outer peripheral surface of the second portion 132b is a semiconical surface.

[0030] Cylindrical portion 137 is a portion of tubular portion 132 where the outer diameter remains constant from the other end (upper end) to one end (lower end). Cylindrical portion 137 is provided further above the upper end (tip) of enlarged portion 136, that is, continuous with the upper portion of tubular portion 132. An opening is formed at the upper end of cylindrical portion 137, and this opening constitutes liquid supply port 135 for supplying liquid into tank body 131. Therefore, the inner diameter of cylindrical portion 137 matches the opening diameter of liquid supply port 135.

[0031] An external thread portion 139 is formed on the outer circumferential surface of the cylindrical portion 137. The external thread portion 139 is screwed into an internal thread portion 141 of the cap 140. In other words, the cylindrical portion 137 is configured so that the cap 140 can be screwed thereto.

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

[0033] Specifically, since the second portion 132b of the expansion portion 136 is at an angle of 90° to the flat portion 131a of the tank body 131, if the cylindrical portion 137 is connected to the expansion portion 136 so that the liquid supply port 135 faces diagonally upward, the liquid supply port 135 will be positioned outside the second portion 132b.

[0034] In this embodiment, the outer diameter of the cylindrical portion 137 is set smaller than the outer diameter of the tip of the expanded portion 136 so that the liquid supply port 135 fits within the range of the closed curve formed by the contact region 132c of the tubular 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 fit within the range of the closed curve when viewed from a direction perpendicular to the outer surface (flat portion) 131a.

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

[0036] 8, the cap 140 is formed in a covered cylindrical shape that seals the liquid supply port 135. In this embodiment, a female thread portion 141 that screws into a male thread portion 139 formed on the outer circumferential surface of the cylindrical portion 137 is formed on the inner periphery of the cap 140. This allows the cap 140 to be screwed into the cylindrical portion 137 of the tubular portion 132.

[0037] A dome-shaped enclosure 142 is formed on the inner periphery (the back surface of the lid) of cap 140. Enclosure 142 is made of an elastic material such as rubber, and is inserted into cylindrical portion 137 to seal the inside of cylindrical portion 137.

[0038] As shown in FIG. 6, the working machine 1 includes a cylindrical strainer 143 that is inserted into the cylindrical portion 132 and is inserted concentrically or approximately concentrically with the opening center line Lc of the liquid supply port 135. The strainer 143 removes impurities contained in the fuel supplied to the fuel tank. As shown in FIG. 6 and FIG. 7, the strainer 143 is formed in a cylindrical shape of a size that can be inserted into the inside of the cylindrical portion 132. That is, the outer diameter of the strainer 143 is slightly smaller than the opening diameter of the liquid supply port 135, and is insertable 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, is configured to be concentric or approximately concentric with the opening center line Lc of the liquid supply port 135. As shown in FIG. 7, an opening 143a is formed in the upper part of the strainer 143. A strainer packing 155 is provided at the opening 143a to bring the strainer 143 into close contact with the liquid supply port 135. A mesh 156 is provided on the outer periphery of the strainer 143 to filter out impurities in the fuel.

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

[0040] The fixing piece 133 is fitted approximately parallel to the outer surface 131a of the tank body 131 with respect to the elastic member 145 fitted onto the cylindrical portion 132, and is fixed to the body 2. The fixing piece 133 is fixed to the body 2, thereby fixing the tank 130 to the 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 configured so as to be able to be placed on the outer surface (flat surface portion) 131a of the tank body 131.

[0042] A through hole 149 into which the tubular portion 132 can be inserted is formed in the center of the first piece 133a. In this embodiment, the through hole 149 is formed so that the tubular 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 a gap is formed between the periphery of the inserted tubular 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 a fixing device 151 are drilled at both ends of the second piece 133b. The second piece 133b is directly or indirectly fixed to the airframe 2 via a fixing device (screw member) 151 inserted into the fixing hole 152 of the second piece 133b. In this embodiment, the fixing piece 133 is fixed at a position where the first piece 133a overlaps with the upper surface (flat surface portion) 131a of the fuel tank 130 (tank body 131) arranged on the airframe 2 (swivel base 5). In this embodiment, the fixing piece 133 is fixed to the upper surface of a hydraulic oil tank 150 fixed to the airframe 2, and is indirectly fixed to the airframe 2.

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

[0045] The elastic member 145 is fitted onto the cylindrical portion 132 in a state substantially parallel to the outer surface 131a of the tank body 131 and non-perpendicular to the protruding direction of the cylindrical portion 132. That is, the elastic member 145 is formed into an annular shape and configured to be able to be fitted onto the cylindrical portion 132 of the fuel tank 130. The inner peripheral surface of the elastic member 145 is in close contact with an annular contact region 132c that is approximately parallel to the outer surface 131a of the tank body 131 on the outer peripheral surface of the cylindrical portion 132 and is not perpendicular to the protruding direction of the cylindrical portion 132. That is, the inner peripheral surface of the elastic member 145 is formed according to the outer peripheral surface of the cylindrical portion 132 and can be in close contact with the outer peripheral 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 peripheral shape of this through hole is formed according to the outer peripheral shape of the enlarged portion 136 of the cylindrical portion 132. As a result, in the elastic member 145, the inner peripheral surface 145c that defines the through hole can be in close contact with the outer surface of the enlarged portion 136 of the cylindrical portion 132 over the 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 fixed piece 133 (first piece 133a). The elastic member 145 also has an annular protrusion portion 148 that extends from the flange portion 147 and is sandwiched between the tubular portion 132 (expanded portion 136) and the inner circumferential surface of the through hole 149 of the fixed piece 133 within the through hole 149 of the fixed piece 133.

[0047] The flange 147 and the annular protrusion 148 are molded integrally. The through hole of the elastic member 145 is formed by the inner hole of the flange 147 and the annular protrusion 148. That is, the inner hole of the flange 147 and the annular protrusion 148 are continuous to form the through hole of the elastic member 145. Accordingly, the inner peripheral surface that abuts against the abutment area included in the outer peripheral surface of the cylindrical portion 132 is formed by the inner peripheral surface of the flange 147 and the inner peripheral surface of the annular protrusion 148 being continuous. The thickness of the flange 147 is set so that it is sandwiched in a compressed state between the first piece 133a of the fixing piece 133 fixed to the airframe 2 and the flat portion 131a of the fuel tank 130 supported by the airframe 2. In contrast, the annular protrusion 148 is disposed in the gap between the inner peripheral surface of the through hole 149 of the fixing piece 133 and the cylindrical portion 132 (the enlarged portion 136). The thickness of the annular protrusion 148 is set so as to be in a compressed state between the inner circumferential surface of the through hole 149 of the fixing piece 133 and the cylindrical portion 132 (expanded portion 136). As a result, the elastic member 145 (annular protrusion 148) fills the gap between the inner circumferential surface of the through hole 149 of the fixing piece 133 and the cylindrical portion 132 (expanded portion 136), and absorbs lateral impact acting on the fuel tank 130 while restricting lateral shaking of the fuel tank 130 (cylindrical portion 132).

[0048] A part of the annular protrusion 148 protrudes from the fixed piece 133 to the other end side of the cylindrical part 132 when the fixed piece 133 is fitted onto the annular protrusion 148. That is, the annular protrusion 148 is also formed so as to protrude outward from the first piece 133a of the fixed piece 133. Specifically, the upper end of the annular protrusion 148 protrudes further upward from the fixed piece 133. When the upper end of the annular protrusion 148 is caused to protrude upward from the fixed piece 133 in this manner, the upper end of the annular protrusion 148 protruding upward from the fixed piece 133 swells due to the elastic force of the elastic material. The swelled annular protrusion 148 prevents the elastic member 145 from slipping out downward from the through hole 149 of the fixed 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 fixed piece 133 is less likely to slip out.

[0049] Next, a procedure for assembling the elastic member 145 and the fixing piece 133 to the cylindrical portion 132 will be described with reference to FIGS.

[0050] As shown in FIG. 11, the elastic member 145 is brought close to the cylindrical portion 132 from the annular convex portion 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 convex portion 148 side is equal to or slightly smaller than the outer diameter (outer diameter of the lower end of the expanded portion 136) of the lower end (one end) of the cylindrical portion 132. Therefore, the other end of the cylindrical portion 132, which has a smaller diameter than the one end side, can be easily inserted into the opening on the annular convex portion 148 side, which has a larger opening diameter. In addition, the liquid supply port 135 is arranged so as to be projected within the range of the closed curve formed by the contact region 132c of the cylindrical portion 132 when viewed from a direction perpendicular to the flat portion 131a of the tank body 131, so that the elastic member 145 can be easily guided to the one end side 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 surface 145c of the elastic member 145 is formed in accordance with the outer peripheral surface (the outer peripheral surface near the lower end) of the tubular portion 132, when the elastic member 145 is brought close enough to contact the outer surface 131a of the tank body 131, the inner surface 145c of the elastic member 145 comes into close contact with the outer peripheral surface of the tubular portion 132.

[0051] 12, the fixed piece 133 is brought close to the elastic member 145 in close contact with the outer peripheral surface of the cylindrical portion 132 (expanded portion 136) from a direction perpendicular to the outer surface (flat portion) 131a of the tank body 131 (from above), and the cylindrical portion 132 and the annular protrusion 148 are inserted (press-fitted) into the through hole 149 of the first piece 133a of the fixed piece 133. In addition, the elastic member 145 (flange portion 147) is sandwiched between the first piece 133a of the fixed piece 133 and the outer peripheral surface of the cylindrical portion 132.

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

[0053] In this way, the elastic member 145 and the fixed piece 133 can be assembled while being moved in 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 main body 131 for containing a liquid, a cylindrical portion 132 protruding from an outer surface 131a of the tank main body 131 in a protruding direction inclined relative 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 having one end connected to the tank main body 131 and the other end constituting the liquid supply port 135, the elastic member 145 being fitted onto the cylindrical portion 132 in a state approximately parallel to the outer surface 131a and non-perpendicular to the protruding direction of the cylindrical portion 132, and the fixing piece 133 being fitted onto the elastic member 145 fitted onto the cylindrical portion 132 approximately parallel to the outer surface 131a and fixed to the machine body 2.

[0055] According to the above configuration, the elastic member 145 and the fixing piece 133 can be assembled approximately parallel to the outer surface 131a of the tank body 131 with respect to the tubular portion 132 protruding in an inclined protruding direction from the outer surface 131a of the tank body 131, so that the tank 130 having the tubular portion 132 protruding in an inclined direction from the tank body 131 can be easily fixed to the aircraft body 2.

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

[0057] The cylindrical portion 132 is disposed so that a portion of the cylindrical portion 132 on the other end side beyond the contact region 132c fits within the range of the closed curve formed by the contact region 132c when viewed from a direction perpendicular to the outer surface 131a. According to the above configuration, the elastic member 145 can be easily assembled (fitted) to the cylindrical portion 132 by simply approaching (approaching) the elastic member 145 in a straight line in a direction perpendicular to the outer surface 131a of the tank body 131. In addition, in a cross section perpendicular to outer surface 131a and passing through the center of cylindrical portion 132 at the one end, the angle formed between the outer peripheral surface of cylindrical portion 132 and outer surface 131a is 90° or more at any position in the circumferential direction of cylindrical portion 132. According to the above-mentioned configuration, the elastic member 145 can be brought into contact with the outer surface 131a of the tank body 131 in a direction perpendicular to the outer surface 131a, 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 main body 131 for containing a liquid, a cylindrical portion 132 protruding from an outer surface 131a of the tank main body 131 in a protruding direction inclined relative 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 having one end connected to the tank main body 131 and the other end constituting a liquid supply port 135, and 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 formed between the outer peripheral 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. According to the above-mentioned configuration, the elastic member 145 can be brought into contact with the outer surface 131a of the tank body 131 in a direction perpendicular to the outer surface 131a, and the elastic member 145 can be easily incorporated into the cylindrical portion 132.

[0059] Elastic member 145 has flange 147 that is sandwiched between outer surface 131a and fixed piece 133. According to the above configuration, flange 147 is disposed between outer surface 131a of tank body 131 and fixed piece 133, so that elastic member 145 presses tank body 131 appropriately, and tank 130 can be reliably fixed.

[0060] The elastic member 145 has an annular protrusion 148 extending from the flange 147, which is sandwiched between the cylindrical portion 132 and the inner peripheral surface of the through hole 149 within the through hole 149. According to the above configuration, as described above, the flange 147 is disposed between the outer surface 131a of the tank body 131 and the fixing piece 133, and the annular protrusion 148 is sandwiched between the cylindrical portion 132 and the inner peripheral surface of the through hole 149, so that lateral shaking of the cylindrical portion 132 (wobbling in a direction perpendicular to the center line of the through hole 149) is restricted. Furthermore, a portion of the annular protrusion 148 protrudes from the fixed piece 133 toward the other end when the fixed piece 133 is fitted onto the annular protrusion 148. As a result, the portion of the annular protrusion 148 protruding from the fixed piece 133 expands due to the elastic force of the elastic member 145, so that it is possible to prevent the elastic member 145 from coming out of the through hole 149 of the fixed piece 133.

[0061] The tank 130 is disposed with the outer surface 131a facing upward. According to the above configuration, the elastic member 145 and the fixing piece 133 can be easily assembled by approaching the upper surface (outer surface 131a) of the tank 130 from above the tank 130.

[0062] Cylindrical portion 132 includes enlarged portion 136 whose cross-sectional shape expands from the other end side toward the one end side, and elastic member 145 is fitted onto the outside of enlarged portion 136. According to the above configuration, elastic member 145 can be easily assembled to enlarged portion 136 whose cross-sectional shape expands from the other end side toward the one end side.

[0063] The protruding direction is inclined toward the outside of the machine body 2 with respect to the vertically upward direction. According to the above configuration, the liquid supply port 135 can be easily accessed from the outside of the work machine 1.

[0064] The tank 130 is a fuel tank that stores fuel to be supplied to the prime mover 91 provided in the work machine 1. According to the above-described configuration, daily refueling operations can be smoothly performed.

[0065] Although the embodiment of the present invention has been described above, the embodiment disclosed herein should be considered as illustrative and not restrictive in all respects. The scope of the present invention is indicated by the claims, not by the above description, and is intended to include all modifications within the meaning and scope of the claims.

[0066] In the above embodiment, an example has been given in which the tank of the present invention is applied to the fuel tank 130. However, the tank of the present invention may be applied to the hydraulic oil tank 150, or may be applied to another tank provided in 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 this is not limited to the above. That is, the range in 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 a range narrower than half the circumference in the circumferential direction. Also, the first portion 132a and the second portion 132b may be provided over a range wider than half the circumference in the circumferential direction.

[0068] In the above embodiment, the first portion 132a is formed in a substantially semicircular truncated cone shape that expands in a direction away from point O as it approaches the tank body 131, and the second portion 132b is formed in a semicylindrical shape around an axis extending in a direction perpendicular to the outer surface 131a, but is not limited to this. For example, both the first portion 132a and the second portion 132b may be formed in a substantially semicircular truncated cone shape that expands in a direction away from point O as it approaches the tank body 131, and the entire tubular portion 132 (expanding portion 136) may be formed in a truncated cone shape.

[0069] In the above embodiment, the tubular portion 132 includes the enlarged portion 136 and the cylindrical portion 137, and the enlarged portion 136 enlarges toward the tank body 131, so that the tubular portion 132 enlarges from the other end side toward one end, but this is not limited thereto. For example, when the cap 140 that seals the liquid supply port 135 is of an insert type, the tubular portion 132 may be composed of only the enlarged portion 136. That is, only the enlarged portion 136 of the above embodiment may be the tubular portion 132. In this case, it goes without saying that the tip opening of the enlarged portion 136 constitutes the liquid supply port 135 that faces obliquely upward. It goes without saying that the description of the tubular portion 132 in this case can be understood by replacing the enlarged portion 136 in the description of the above embodiment with the tubular portion 132.

[0070] Although not specifically mentioned in the above embodiment, the elastic member 145 (bump 147) is not limited to being sandwiched entirely between the outer surface (flat surface) 131a of the tank body 131 and the fixed piece 133 (first piece 133a), and the elastic member 145 (bump 147) may be partially sandwiched between the outer surface (flat surface) 131a of the tank body 131 and the fixed piece 133 (first piece 133a). In addition, the elastic member 145 is not limited to having the annular protrusion 148. That is, the elastic member 145 may have only a portion corresponding to the bump 147 in the above embodiment. However, in order to protect the tank 130 from lateral shaking and lateral impact, it is preferable to have the annular protrusion 148, as in the above embodiment. In addition, in the present embodiment, the 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 fixed piece 133, but the present invention 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 fixed piece 133 and the outer circumferential surface of the cylindrical portion 132 in a state separated from the outer surface 131a of the tank body 131. In this case, the elastic member 145 may not be provided with the flange portion 147.

[0071] In the above embodiment, a backhoe has been described as the work machine 1, but this is not limited to this. For example, the work machine 1 may be various construction machines other than a backhoe, or various agricultural machines such as a tractor or a combine harvester. [Explanation of symbols]

[0072] 1 Work equipment 2. Aircraft 91 Prime Mover 130 Tank (Fuel Tank) 131 Tank body 131a Outer surface of tank body 132 Cylindrical part 132a Part 1 132b Part 2 133 Fixed piece 135 Oil supply port (oil supply port) 136 Enlarged section 137 Cylindrical section 140 Cap 143 Strainer 145 Elastic Members 147 Flange 148 Annular protrusion 149 Through hole Lc aperture center line

Claims

1. The aircraft and a tank including a tank body that contains a liquid and a cylindrical portion that protrudes from an outer surface of the tank body in a protruding direction that is inclined with respect to the outer surface; a fixing piece having a through hole through which the cylindrical portion is inserted and fixing the tank to the aircraft body; an elastic member sandwiched between the fixed piece and the cylindrical portion, The cylindrical portion has one end connected to the tank body and the other end constituting a liquid supply port, the elastic member is fitted onto the cylindrical portion in a state substantially parallel to the outer surface and non-perpendicular to a protruding direction of the cylindrical portion, The fixing piece is fitted approximately parallel to the outer surface of the elastic member that is fitted onto the cylindrical portion, and is fixed to the body of the work machine.

2. The work machine according to claim 1 , wherein the inner peripheral surface of the elastic member is shaped to closely contact an annular contact area of ​​the outer peripheral surface of the cylindrical portion that is generally parallel to the outer surface and not perpendicular to the protruding direction of the cylindrical portion.

3. The work machine according to claim 2, wherein the cylindrical portion is positioned so that the portion of the cylindrical portion toward the other end side relative to the abutment area is projected to fall within the range of a closed curve formed by the abutment area when viewed from a direction perpendicular to the outer surface.

4. The working machine according to claim 1, wherein the angle formed between the outer peripheral 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 the one end is 90° or greater at any position around the circumference of the cylindrical portion.

5. The aircraft and a tank including a tank body that contains a liquid and a cylindrical portion that protrudes from an outer surface of the tank body in a protruding direction that is inclined with respect to the outer surface; a fixing piece having a through hole through which the cylindrical portion is inserted and fixing the tank to the aircraft body; an elastic member sandwiched between the fixed piece and the cylindrical portion, The cylindrical portion has one end connected to the tank body and the other end constituting a liquid supply port, The cylindrical portion is a work machine in which the angle formed between the outer peripheral 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 the one end is 90° or greater at any position around the circumference of the cylindrical portion.

6. 2. 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.

7. The work machine according to claim 6 , wherein the elastic member has an annular protrusion extending from the flange portion and sandwiched within the through hole between the cylindrical portion and an inner peripheral surface of the through hole.

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

9. The work machine according to claim 1 , wherein the tank is disposed with the outer surface facing upward.

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

11. The work machine according to claim 1 , wherein the protruding direction is inclined outwardly of the body with respect to a vertically upward direction.

12. 2. The work machine according to claim 1, wherein the tank is a fuel tank that stores fuel to be supplied to a prime mover provided in the work machine.

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