JP2006316484A - Tank mounting structure for work machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tank mounting structure for a hydraulic shovel which is set up by rotatably mounting an upper rotary body 3 on a lower traveling body 1 via a rotating mechanism X, wherein the tank mounting structure can stably mount an operating oil tank 8 on a rotary body frame 4 such that part of the operating oil tank 8 overlaps an area above the rotating mechanism X. <P>SOLUTION: Block members 9, 10 are welded to a lower surface plate 8f of the operating oil tank 8 in a manner protruding outward, then tightly secured from below to respective mounting plates 11, 12 with bolts 14 at a location avoiding the rotating mechanism X, and tightly secured to the respective mounting plates 11, 12 from above with bolts 15 at a location partly overlapping the rotating mechanism X. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention belongs to the technical field of a tank mounting structure for a work machine such as a hydraulic excavator.

In general, a swing type work machine such as a hydraulic excavator is configured such that an upper swing body is provided on a lower traveling body so as to be rotatable about a vertical axis via a swing mechanism. In such a swivel-type work machine, a tank such as a hydraulic oil tank or a fuel tank is attached. For example, a seat plate having a substantially J-shape in a side view is prepared as a mounting structure of such a tank. The long plate surface of the seat plate is welded to the side surface of the tank, the upper end of the short plate is welded to the lower surface of the tank lower surface plate, and the space formed between the tank bottom surface and the bottom surface of the seat plate is thereby formed. There has been known one that is tightly attached to a nut using a bolt inserted from below (for example, Patent Document 1).
Japanese Patent Laid-Open No. 9-302716

  By the way, when the turning work machine is, for example, a hydraulic excavator, it is difficult to secure a sufficient space for arranging various member devices, so that the tank partially overlaps the turning mechanism. In such a case, when the conventional mounting structure is adopted, a part of the seat plate overlaps above the pivot mechanism, and the overlap portion and In the vicinity thereof, there is a problem that the swivel mechanism is obstructed and bolts cannot be screwed in from below, so that easy tank mounting cannot be performed, and there is a problem that the present invention does not solve.

The present invention has been created in order to solve these problems in view of the above circumstances, and the invention of claim 1 is intended to attach a tank such as a hydraulic oil tank or a fuel tank to an airframe frame. The block material fixed to the lower surface of the tank so as to protrude outward from the periphery of the tank is formed with a screw hole into which a bolt can be screwed from below and a bolt through hole provided in the protruding portion. The block material is fixed to the body frame side via bolts screwed into the screw holes from below, and the block material is moved to the body frame side via bolts having the bolt through holes penetrated from above. A tank mounting structure in a work machine characterized by being fixed.
According to a second aspect of the present invention, in the first aspect, the work machine is a swing type work machine in which the upper swing body is provided on the lower traveling body in a freely swingable manner via a swing mechanism. The screw holes are all provided at positions avoiding the turning mechanism, and the bolt through holes are provided at positions partially overlapping above the turning mechanism. It is the tank attachment structure in the working machine characterized by the above-mentioned.
According to a third aspect of the present invention, there is provided the tank in the working machine according to the second aspect, wherein the block material is fixed to the lower surface of the tank lower surface plate, and the tank lower surface plate extends to the protruding portion of the block material. It is a mounting structure.
According to a fourth aspect of the present invention, in the third aspect of the present invention, the portion of the tank bottom plate that extends is provided with an idiot hole in which a bolt is loosely fitted at a position corresponding to the bolt through hole. A tank mounting structure in a machine.

By setting it as invention of Claim 1, even if there exists an obstruction like a turning mechanism below, a tank can be easily attached from the upper part.
According to the second aspect of the present invention, the tank can be easily attached above the turning mechanism that obstructs the attachment from below in a state where a part of the tank overlaps the turning mechanism when seen in a plan view.
According to the invention of claim 3, the fixing position between the tank lower surface plate and the block material can be an extended tip portion separated from the fixing position between the tank side surface plate and the lower surface plate. It is possible to avoid the possibility of distortion deformation due to the adhesion between the face plate and the block material being too close to the adhesion between the tank side plate and the bottom plate.
According to the invention of claim 4, even if there is an error in the attachment of the block material, the tank can be securely attached.

Next, embodiments of the present invention will be described with reference to the drawings. In the figure, reference numeral 1 denotes a lower traveling body of a hydraulic excavator. The lower traveling body 1 is provided with an upper swing body 3 to which a front attachment 2 with a bucket is attached. The body frame (corresponding to the machine body frame) 4 is fixed with a turning circle (outer race) 6 provided so as to be rotatable with respect to a turning bearing (inner race) 5 provided in the lower traveling body 1. The upper swing body 3 is swung with respect to the lower traveling body 1 by forward and reverse driving of a swing motor 7 provided on the upper swing body 3 and having an output gear meshing with the swing bearing 5. All of them are the same as in the past.
Although the hydraulic oil tank 8 and the fuel tank 9 are mounted on the revolving body frame 4, in the present embodiment, the present invention is implemented to attach the hydraulic oil tank 8. A mounting structure will be described.

  When viewed in plan, the hydraulic oil tank 8 is disposed such that a part thereof, in this embodiment, the inner side in the left-right direction (the turning mechanism X side) overlaps the upper surface of the turning mechanism X across the front and rear. Has been. By the way, the hydraulic oil tank 8 of the present embodiment is formed in a rectangular shape (substantially square shape) using front and rear side plates 8a and 8b, left and right side plates 8c and 8d, and upper and lower side plates 8e and 8f. However, here, the left and right side plates 8c, 8d and the bottom plate (bottom plate) 8f are integrally formed by bending the plate material into a square shape, and the left and right side plates 8c, 8d and the top and bottom plates 8e, 8f are These are integrally formed by projecting in the front-rear direction from the front and rear side plates 8a and 8b and welding (fixing) the plate surfaces to each other by 8k.

  In the present embodiment, the lower surface plate 8f extends (projects) so that the amount of protrusion in the front-rear direction from the front and rear side plates 8a and 8b is longer than that of the upper surface plate 8e, and the front and rear extending portions 8g and 8h are provided. The front extension 8g is formed with a pair of idiot holes 8i in the left and right direction, and the rear protrusion 8h has three idiot holes 8j in the left and right direction. When the inner one of the three rear idiot holes 8j is viewed in plan view, it overlaps above the turning mechanism X, and the central idiot hole 8j is positioned near the outer periphery of the turning mechanism X. ing.

  On the other hand, 9 and 10 are front and rear block members, and the block members 9 and 10 are welded (fixed) 9c and 10c to the lower surface plate 8f at the inner side in the front and rear direction than the positions of the front and rear side plates 8a and 8b. It protrudes from the front and rear end portions of 8f to the extended end portions of the extending portions 8g and 8h, and the protruding ends are welded (fixed) 9d and 10d to the lower surface of the extending portions 8g and 8h. The side block member 10 has a long left and right length so as to reach a position overlapping the upper part of the turning mechanism X when viewed in plan. These block members 9 and 10 are provided with bolt through holes 9a and 10a having a diameter smaller than that of the idiot hole and screw holes 9b and 10b correspondingly to the idiot holes 8i and 8j. However, the screw holes 9b and 10b are provided at positions avoiding the position overlapping the turning mechanism X when viewed in plan.

  Reference numerals 11 and 12 are front and rear mounting plates formed in a substantially square shape in a side view, and the lower end edges of the mounting plates 11 and 12 are welded (fixed) to the frame plate 4a of the revolving body frame 4. The frame plate 4a is fixed to the swivel circle 6 via bolts 6a. Bolt through holes 11b, 12b and 11c, 12c are drilled in the top plates 11a, 12a of the mounting plates 11, 12 at positions corresponding to the bolt through holes 9a, 10a and positions corresponding to the screw holes 9b, 10b, respectively. Further, a nut 13 is welded (fixed) to the lower surface of the mounting plate upper surface plates 11a, 12a at positions corresponding to the bolt through holes 9a, 10a. The frame plate 4a has openings 4b and 4c corresponding to the bolt through holes 11c and 12c, so that bolt tightening work can be performed from below the frame plate 4a.

  And the hydraulic oil tank 8 is the state which aligns the bolt through-holes 9a and 10a by the side of the block materials 9 and 10 and the bolt through-holes 11b and 12b by the side of the attachment plates 11 and 12, and the front-and-rear attachment plate upper surface plates 11a and 12a. The front and rear block members 9 and 10 are placed on the frame plate 4a, and the bolts 14 are inserted into the bolt through holes 11c in a state where the spacers 14a are applied to the lower surfaces of the mounting plate upper surface plates 11a and 12a through the openings 4b and 4c opened in the frame plate 4a. The block members 9 and 10 can be fixed to the revolving body frame 4 via the mounting plates 11 and 12 by screwing and tightening to 12c, and the spacer 15a can be loosely fitted into the foolish holes 8i and 8j to The hydraulic oil tank 8 is mounted in a state where a part of the bolt 15 overlaps the turning mechanism X by screwing and tightening the bolt 15 into the nut 13 in a state of being applied to the nut 10. So that the can be fixed is.

  In the embodiment of the present invention configured as described above, the hydraulic oil tank 8 includes block members 9 and 10 fixed so as to protrude in the front-rear direction from the front and rear side plates 8a and 8b of the hydraulic oil tank 8. The block members 9 and 10 are fixed to the revolving structure frame 4 via the revolving structure frame 4 at a position avoiding the revolving mechanism X so that the revolving mechanism X does not interfere when viewed in plan. The fixed block members 9, 10 are fixed to the side from below by means of bolts 14, and the fixed block members 9, 10 are in a state where they are positioned so as to overlap with the upper part of the turning mechanism X when a part of the bolts 15 are viewed in plan view. The hydraulic oil tank 8 can be easily attached from above even if there is an obstacle such as the turning mechanism X below.

  In addition, the positions 9d and 10d of the tank lower surface plate 8f and the block materials 9 and 10 can be made to be extended tip portions separated from the positions of the tank front and rear side surface plates 8a and 8b and the lower surface plate 8f. As a result, it is possible to avoid the possibility of distortion deformation due to the positions of the welds 9d and 10d between the tank lower surface plate 8f and the block members 9 and 10 being too close to the positions of the tank front and rear side plates 8a and 8b and the lower surface plate 8f. . If the possibility of welding distortion does not become a problem, the tank lower surface plate 8f may have no front and rear extension portions 8g and 8h as in the second embodiment shown in FIG.

  Further, since the extension portions 8g and 8h extending from the lower surface plate 8f are provided with idiot holes 8i and 8j so that the bolt 15 is loosely fitted, the block material 9 for the hydraulic oil tank 8 is provided. Even if there is an error in the mounting of 10, the tank can be securely mounted.

It is a side view of a hydraulic excavator. It is a top view of a hydraulic oil tank attachment site. It is a side view of a hydraulic oil tank attachment site. It is a perspective view of a hydraulic oil tank attachment site. It is a principal part expansion perspective view of a hydraulic-oil tank attachment site | part. It is a partial expanded sectional view of a hydraulic oil tank attachment site. It is a partial expanded sectional view of the hydraulic oil tank attachment site | part which shows 2nd embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lower traveling body 3 Upper revolving body 4 Revolving body frame 8 Hydraulic oil tank 8f Tank lower surface plate 8g, 8h Extension part 8i, 8j Stupid hole 9, 10 Block material 9a, 10a Bolt through-hole 9b, 10b Screw hole 11b, 12b Bolt through hole 14, 15 Bolt X Rotating mechanism

Claims (4)

  When attaching a tank such as a hydraulic oil tank or a fuel tank to the fuselage frame, a screw hole into which a bolt can be screwed from below is attached to the block material fixed to the lower surface of the tank so as to protrude outward from the periphery of the tank. And a bolt through hole provided in the projecting portion, and the block member is fixed to the body frame side via a bolt screwed into the screw hole from below, while the bolt through hole is A tank mounting structure in a work machine, wherein a block member is fixed to the body frame side through a bolt penetrated from the machine.   2. The working machine according to claim 1, wherein the work machine is a swivel work machine in which an upper revolving unit is rotatably provided on a lower traveling body via a revolving mechanism, and a part of the tank is located above the revolving mechanism when viewed in plan. The screw holes are provided at positions where they are overlapped, all the screw holes are provided at positions avoiding the turning mechanism, and the bolt through holes are provided at positions partially overlapping above the turning mechanism. Tank mounting structure for work machines.   3. The tank mounting structure in a working machine according to claim 2, wherein the block material is fixed to the lower surface of the tank lower surface plate, and the tank lower surface plate extends to a protruding portion of the block material.   4. The tank mounting structure for a work machine according to claim 3, wherein a foolish hole for loosely fitting a bolt is formed at a position corresponding to the bolt through hole in a portion where the tank lower surface plate extends.

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