JP6638973B2 - Work machine tank structure - Google Patents

Description

  The present invention relates to a tank structure of a working machine for mounting an object to be mounted on a tank body provided on a body of the working machine.

  2. Description of the Related Art Conventionally, a body of a working machine such as a hydraulic shovel is equipped with a fuel tank for storing fuel for driving an engine and a hydraulic oil tank for storing hydraulic oil for operating a hydraulic actuator. Various devices and covers are arranged around these tanks. These devices and covers are sometimes fixed to fixing members such as bosses and brackets welded to the tank wall surface (for example, see Patent Documents 1 and 2).

JP-A-2002-256593 JP 2006-183415 A

  The above-mentioned tank is generally a sheet metal tank formed by laminating thin plates by welding. For this reason, the wall surface of the tank may vibrate like a drum membrane due to expansion due to a temperature change of the stored internal liquid, or vibration of the liquid due to vibration during excavation. Therefore, when the tank wall surface vibrates in this manner, stronger welding, reinforcement, and the like are required so that cracks do not occur in the welded portion between the fixing member and the tank wall surface.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances, and allows an object to be mounted to be fixed at a desired position facing an opposing surface portion, and at the same time, faces the opposing surface portion of the tank body due to the effect of liquid stored inside the tank body. It is an object of the present invention to provide a tank structure of a working machine that can surely prevent damage to a fixed portion due to film vibration.

  The invention according to claim 1 includes a tank body provided in a body of a work machine and storing a liquid therein, and a mounting portion provided in the tank body and having a fixing portion to which an object to be mounted is mounted. A tank body facing an object to be mounted, an end surface extending along a direction intersecting the opposing surface at both ends of the opposing surface, and projecting toward the object from an end of the end surface. And a mounting portion is provided across the protruding portion, is separated from the opposing surface portion, and is a tank structure of a working machine in which an object to be mounted is fixed on a side opposite to the opposing surface portion by a fixing portion. is there.

  According to a second aspect of the present invention, in the tank structure of the working machine according to the first aspect, the mounting portion includes a mounting portion main body mounted between the projecting portions, and the fixing portion is separate from the mounting portion main body. This is the tank structure of the working machine attached to the attachment portion main body.

  According to a third aspect of the present invention, there is provided a working machine tank structure in which the fixing portion in the working machine tank structure according to the first aspect is a fixing hole provided in the mounting portion.

  According to a fourth aspect of the present invention, there is provided a working machine tank structure in which the facing surface and the end face in the tank structure of the working machine according to any one of the first to third aspects constitute a part of a side surface of the tank body.

  According to a fifth aspect of the present invention, there is provided a work machine tank structure according to any one of the first to fourth aspects, wherein the projecting portion of the work machine tank structure is formed by extending an end of an end face.

  According to the first aspect of the present invention, the mounting portion is attached between the protruding portions protruding toward the mounted object from the ends of the end surfaces at both ends of the opposing surface portion of the tank body, and is separated from the opposing surface portion. The liquid stored in the tank body can be fixed at a desired position facing the opposing surface by fixing the object to be mounted by the fixing portion on the side opposite to the opposing surface of the mounting portion. It is possible to reliably prevent the fixing portion from being damaged due to the membrane vibration of the facing surface portion of the tank body due to the influence of the above.

  According to the second aspect of the present invention, by attaching the fixing portion separate from the mounting portion main body to the mounting portion main body, the fixing portion can be easily set without processing the mounting portion main body itself, and can be fixed. By making the size and the shape of the part different, it is possible to easily cope with the attachment of an object having a different shape.

  According to the third aspect of the invention, since the fixing portion is a fixing hole provided in the mounting portion, the fixing portion can be easily provided to the mounting portion.

  According to the invention described in claim 4, since the facing surface portion and the end surface portion constitute a part of the side surface of the tank body, the facing surface portion is more susceptible to the influence of the liquid stored inside the tank body. Since the fixing portion is separated from the opposing surface portion, it is possible to reliably prevent the fixing portion from being damaged due to membrane vibration of the opposing surface portion of the tank main body due to the effect of the liquid stored inside the tank main body.

  According to the invention described in claim 5, by forming the protruding portion by extending the end of the end surface portion, the protruding portion can be easily formed only by adjusting the cutout dimension of the material constituting the end surface portion, It can be manufactured at low cost.

It is a perspective view showing a 1st embodiment of a tank structure of a work machine concerning the present invention. It is a perspective view which expands and shows a part of tank structure same as the above. FIG. 2 is a sectional view corresponding to a part of a position corresponding to II in FIG. 1. It is a side view which shows the working machine provided with the same tank structure. It is a perspective view showing a 2nd embodiment of a tank structure of a work machine concerning the present invention.

  Hereinafter, the present invention will be described in detail based on the first embodiment shown in FIGS. 1 to 4 and the second embodiment shown in FIG.

  First, the embodiment shown in FIGS. 1 to 4 will be described.

  FIG. 4 shows a hydraulic shovel type working machine 10. A body 11 of the working machine 10 includes a lower traveling body 12 equipped with a crawler belt driven by a traveling motor (not shown) and an upper rotating body 13. Is provided so as to be capable of turning by a turning motor (not shown), and a working device 14, an engine room 15, a cab 16, and a plurality of, for example, two tanks 17 are mounted on the upper turning body 13.

  In the working device 14, a boom 14bm is rotatably supported by a boom cylinder 14c1 in a vertically rotatable manner.A stick 14st is rotatably supported by a tip of the boom 14bm by a stick cylinder 14c2. 14bk is rotatably supported by a bucket cylinder 14c3.

  Further, a control valve for controlling the operation of the above hydraulic actuators (travel motor, swing motor, boom cylinder 14c1, stick cylinder 14c2, bucket cylinder 14c3, etc.) is provided between the working device 14 and the engine room 15, and the like. The machine room is located.

  One of the tanks 17 is a fuel tank that stores fuel for driving the engine, for example, the liquid L (FIG. 1), and the other is, for example, a traveling motor and a swing motor, a boom cylinder 14c1 of the working device 14, and a stick cylinder 14c2. And a hydraulic oil tank storing hydraulic oil, which is a liquid L (FIG. 1) for operating a hydraulic actuator such as a bucket cylinder 14c3. As shown in FIG. 1, the tank 17 is provided with a tank body 21, and at least one of the tanks 17 is provided with a mounting portion 22 integrally with the tank body 21. In the tank 17 provided with the attachment portion 22, an attachment 23 such as various devices and a cover is attached to the attachment portion 22.

  The tank body 21 is a portion that stores the liquid L therein, and includes a top surface 25 as an upper surface, a bottom surface 26 as a lower surface, and a side surface 27 located between the top surface 25 and the bottom surface 26. It is formed in a square box shape. The tank body 21 is a sheet metal tank in which the top surface 25, the bottom surface 26, and the side surface 27 are each formed by a thin sheet metal 29, and is formed by bonding these sheet metals 29 by welding. I have.

  The top surface 25 is formed in, for example, a rectangular flat plate shape. The top surface 25 is provided with an inlet 31 for injecting the liquid L, for example.

  The bottom surface 26 is formed, for example, in the shape of a rectangular flat plate similar to the top surface 25. On the bottom surface 26, a plurality of mount portions 33 for fixing the tank 17 to the upper revolving unit 13 (the airframe 11 (FIG. 4)) are protruded.

  The side surface 27 has a front surface portion 35 as a first surface, and left and right side surface portions 36 and 36 as second surfaces which are located on both left and right sides which are both ends of the front portion 35 and are substantially parallel to each other. It is formed in a substantially quadrangular cylindrical shape having a third surface (not shown) which is a third surface substantially parallel to the front surface 35. That is, the side surface 27 has a front portion 35 continuous with the front portion of the top surface 25 and the bottom surface 26, side portions 36, 36 continuous with the left and right sides of the top surface 25 and the bottom surface 26, and a rear portion of the top surface 25 and the bottom surface 26. The rear part is continuous.

  The front surface portion 35 is a facing surface portion facing the mounted object 23. The front portion 35 is formed of, for example, an integrated sheet metal 29 together with the bottom surface 26 and the rear surface portion, and the front portion 35, the bottom surface 26, and the rear surface portion have a U-shape as a whole. Therefore, the upper end of the front surface 35 is welded to the lower surface of the top surface 25, and both sides of the front surface 35 are welded to the side surfaces 36, 36. Further, a bead portion 41 for reinforcement may be provided in a central portion of the front portion 35 along the vertical direction.

  The side portions 36, 36 are end surfaces extending in a direction intersecting (perpendicular to) the front portion 35 from both right and left sides, which are both ends of the front portion 35, that is, in a rearward direction opposite to the object 23, in a plane. . The side surfaces 36, 36 are formed by a sheet metal 29 integral with the top surface 25, and the side surfaces 36, 36 and the top surface 25 as a whole have a U-shape. Therefore, both sides of the front surface 35, the bottom surface 26, and the rear surface are welded to the side surfaces 36, 36, respectively. Further, a reinforcing bead portion 43 may be provided in the center of each side surface portion 36 along the vertical direction. The front part of each side surface part 36 is a protruding part 45 that protrudes forward with respect to the front surface part 35 on the side of the mounted object 23. In other words, each of the protrusions 45 is an ear formed by extending the front end of the side surface 36 with respect to the front surface 35. In other words, the front surface 35 has a concave shape with the protruding portions 45 standing on both sides. The projecting portions 45 are portions to which the mounting portion 22 is welded and fixed. For example, at least a position where the mounting portion 22 is welded is a step projecting toward the front side, which is the side of the object 23. It is formed as a part 45a (FIG. 2).

  The rear surface portion is located away from the front surface portion 35 on the rear side opposite to the object 23. A reinforcing bead portion may be provided at the center of the rear surface portion.

  On the other hand, in the present embodiment, a pair of the mounting portions 22 are arranged vertically apart from the tank body 21. Each mounting portion 22 includes a flat plate-shaped mounting portion main body 51 and a fixing portion 52 provided integrally with the mounting portion main body 51.

  The mounting portion main body 51 is formed in a long band shape. The mounting portion body 51 is arranged, for example, with its longitudinal direction along the left-right direction, and both end portions are fixed to the protruding portions 45, 45 of the side portions 36, 36 by welding. Therefore, the mounting portion main body 51 is provided so as to extend between the side surfaces 36, 36, in other words, between the side surfaces 36, 36, and is provided on the front side which is the mounting object 23 side with respect to the front surface 35. They are spaced apart.

  The fixing portions 52 are, for example, bosses, and are disposed at a plurality of, for example, two locations separated from each other in the longitudinal direction of the mounting portion main body 51. As shown in FIG. 3, the fixing portion 52 is fitted into, for example, a round hole 54 provided through the mounting portion main body 51, and the periphery thereof is welded to the mounting portion main body 51. Fixed. In this state, the fixing portion 52 protrudes largely to the front side, which is the side of the mounting object 23 (FIG. 1), with respect to the mounting portion main body 51, and the rear end portion is directed forward with respect to the side surface 27 (front surface portion 35). Are separated.

  Next, the operation and effect of the embodiment shown in FIGS. 1 to 4 will be described.

  When manufacturing the tank 17, a U-shaped sheet metal 29 in which the top surface 25 and both side portions 36, 36 are integrally formed, and a U-shaped sheet metal in which the bottom surface 26, the front surface portion 35, and the rear surface portion are integrally formed. The U-shaped sheet metal 29 is welded to each other to form a box-shaped tank body 21. In this state, the ends of the side surfaces 36, 36 are formed as protrusions 45, 45 protruding from the front surface 35.

  Next, to the tank main body 21, the mounting portion 22 in which the fixing portions 52, 52 are welded to the mounting portion main body 51 is welded. At this time, the mounting portion main body 51 and the fixing portion 52 are positioned with respect to the front surface 35 by welding with both end portions of the mounting portion main body 51 positioned at the protruding portions 45, 45 (steps 45a, 45a (FIG. 2)). And fixed at a position separated from the front side.

  Thereafter, the mounted object 23 is fixed from the front side of the fixing portion 52 with bolts or the like. As a result, the attachment 23 is attached to the tank 17. The tank 17 may be fixed to the upper revolving unit by the mounting part with the object 23 attached, or after the tank body 21 is fixed to the upper revolving unit 13 (FIG. 4), The attachment 23 may be attached, or the attachment 23 may be attached after the tank 17 is fixed to the upper swing body 13 (FIG. 4).

  As described above, in the first embodiment, the end portions of the side surfaces 36, 36 at both ends of the front surface 35 of the tank body 21 extend between the protruding portions 45, 45 protruding toward the object 23, respectively. The mounting part 22 is attached to and separated from the front part 35, and the mounting part 23 is fixed by the fixing part 52 to the front side opposite to the front part 35 of the mounting part 22, so that the mounting part 23 is It can be fixed at a desired position facing the part 35.

  The liquid L stored in the tank main body 21 of the tank 17 provided in the body 11 (FIG. 4) may expand due to a change in temperature, travel or excavate the work machine 10 (FIG. 4), or rotate the upper rotating body. 13 (FIG. 4), the vibration caused by the turning or the like and the shaking caused by the centrifugal force, etc., generate deformation such as membrane vibration in a direction intersecting (perpendicularly) to the side surface 27 of the tank body 21 in particular. Cause. At this time, since the fixed portion 52 is separated from the front portion 35 (side surface 27) of the tank body 21, the film vibration of the front portion 35 of the tank body 21 due to the effect of the liquid L stored inside the tank body 21. Accordingly, stress is not concentrated on the fixing portion 52, and damage (cracking) of the fixing portion 52 can be reliably prevented.

  In particular, since the front portion 35 and the side portions 36, 36 constitute a part of the side surface 27 of the tank body 21, the front portion 35 is less affected by the liquid L stored in the tank body 21 (hydrostatic pressure). Although more easily received, the fixing part 52 is separated from the front part 35, so that the fixing caused by the film vibration of the front part 35 of the tank body 21 due to the influence of the liquid L stored inside the tank body 21. Damage to the portion 52 can be reliably prevented.

  In short, the front surface 35, the side surfaces 36, 36, and the rear surface constituting the side surface 27 are formed of the sheet metal 29, and therefore are relatively easily bent in the thickness direction, but are not easily deformed in the surface direction. The front portion 35, the side portions 36, 36, and the rear portion receive pressure in a thickness direction intersecting (perpendicular to) the surface direction by the liquid L stored in the tank body 21. Therefore, by supporting the mounting portion 22 in the surface direction of the side portions 36, 36 by using the protruding portions 45, 45 that are separated from the front surface portion 35 and protrude from the ends of the side portions 36, 36, the pressure of the liquid L is increased. Thus, even if the side surface 27 is bent, the mounting portion 22 can be reliably supported, and the concentration of stress on the fixing portion 52 can be eliminated.

  Further, in the present embodiment, by attaching (welding) the fixing portion 52 separate from the mounting portion main body 51 to the mounting portion main body 51, the fixing portion 52 can be formed without processing the mounting portion main body 51 itself. In addition to being easily set, the size and shape of the fixing portion 52 are made different, so that it is possible to easily cope with the mounting of the object 23 having a different shape.

  Further, by forming the protruding portions 45, 45 by extending the ends of the side portions 36, 36, the protruding portions 45, 45 can be easily formed only by adjusting the cutout dimensions of the material forming the side portions 36, 36. It can be manufactured inexpensively with little increase in steps.

  Moreover, the projecting portions 45, 45 can be formed only by extending the side portions 36, 36, and the attaching portion 22 is attached to the tank body 21 by welding a flat attaching portion main body 51 which does not require processing such as bending. Can be manufactured at a lower cost.

  In the first embodiment, the fixing portion 52 is not limited to the boss, and can be arbitrarily selected as long as it can fix the object 23 such as a block or a blanket.

  Next, the embodiment shown in FIG. 5 will be described.

  The embodiment shown in FIG. 5 is different from the embodiment shown in FIGS. 1 to 4 in that the mounting portion 22 is replaced with a (one) mounting portion 61 and (another) mounting portion 62. The mounting member 23 is directly mounted on the front side of the mounting portions 61, 62 opposite to the front surface 35. In the present embodiment, the upper (one) step portion 64a and the lower (other) step portion 64b are separately set on the protruding portion 45.

  The mounting portion 61 integrally includes mounting portions 66, 66 mounted on the projecting portions 45, 45 on both sides, and a connecting portion 67 for connecting the mounting portions 66, 66 in a bent shape. A fixing portion 68 to which the attachment 23 is attached is provided so as to penetrate in the thickness direction. The mounting portion 61 is located away from the side surface 27 (front surface portion 35) in a forward direction.

  The attached portion 66 is formed in a long band shape. The attached portion 66 is arranged, for example, with its longitudinal direction along the left-right direction, and its end is fixed to the protruding portions 45 by welding.

  The connecting portion 67 is formed in a long band shape, and has both ends bent in a crank shape protruding forward from the mounted portion 66, that is, toward the mounted object 23 side.

  The fixing portion 68 is a plurality of, for example, fixing holes provided at two places separated from each other in the longitudinal direction of the mounting portion 61, and is located at the connecting portion 67 in the present embodiment.

  On the other hand, the mounting portion 62 is formed in a long band shape. The mounting portion 62 is disposed, for example, with its longitudinal direction along the left-right direction, and both ends are fixed to the protruding portions 45 by welding. The mounting portion 62 is provided with fixing portions 69 for fixing the object 23 with bolts (not shown) at a plurality of, for example, two locations separated from each other in the longitudinal direction. The fixing portion 69 is a fixing hole provided to penetrate the mounting portion 62 in the thickness direction.

  The step portions 64a and 64b are positions where the mounting portions 61 and 62 are welded. The step portions 64a and 64b are stepped toward the front side which is the mounting object 23 side with respect to the protruding portions 45 and 45. It is protruding. Further, the step portion 64b is set to have a larger forward projection amount than the step portion 64a. For this reason, the front side of the mounting portion 61 (connecting portion 67) and the front side of the mounting portion 62 are substantially flush with each other.

  Then, the mounting portions 61 and 62 are welded to the manufactured tank body 21. At this time, the mounting portion 61 is fixed to a position separated from the front surface portion 35 on the front side by welding by positioning both ends of the mounting portion 61 at the protruding portions 45, 45 (step portions 64a, 64a). The welding is performed by positioning both ends of the mounting portion 62 at the protruding portions 45, 45 (the step portions 64b, 64b) so that the mounting portion 62 is fixed at a position separated from the front surface portion 35 on the front side.

  Thereafter, the object 23 is fixed to the fixing portions 68, 68, 69, 69 from the front side of the mounting portions 61, 62 by bolts or the like. As a result, the attachment 23 is attached to the tank 17.

  As described above, in the second embodiment, the space between the protruding portions 45 protruding from the ends of the side surfaces 36 on both ends of the front surface portion 35 of the tank body 21 toward the mounted object 23 is provided. Attachment parts 61 and 62 are attached to and separated from front part 35, and fixed parts 68 and 68 and fixing parts 69 and 69 are provided on the front side opposite to front part 35 of these attachment parts 61 and 62, so that object 23 is attached. By having the same configuration as that of the first embodiment, such as fixing the same, the same operation and effect as those of the first embodiment can be obtained.

  Further, by forming the fixing portions 68 and 69 as fixing holes provided in the mounting portions 61 and 62, for example, when the mounting portions 61 and 62 are formed, the fixing portions 68 and 69 can be easily formed on the mounting portions 61 and 62 simultaneously. Can be provided.

  The protrusion 45 (steps 64a, 64b) of the second embodiment may be used in the first embodiment. In this case, the length of the fixing portion 52 and the shape of the mounting portion main body 51 can be made different between the upper mounting portion 22 and the lower mounting portion 22 according to the shape of the object 23 to be mounted.

  Further, the first embodiment and the second embodiment may be combined. That is, it is also possible to combine the mounting portion 22 using the separate fixing portion 52 with at least one of the mounting portions 61 and 62 provided integrally with the fixing portions 68 and 69.

  In the above embodiments, the protruding portion 45 is formed by extending the front edge of the side surface portion 36, but is formed by, for example, welding to extend a separate bracket or the like to the front edge of the side surface portion 36. May be.

  Furthermore, in addition to the configuration in which the attachment 23 is disposed in front of the tank 17, the attachment 23 may be configured in a position excluding the lower side of the tank 17, for example, in a side or rear direction. In this case, similar effects can be obtained by applying the above embodiments with the wall surface of the tank body 21 facing the mounted object 23 as the facing surface portion and the wall surfaces located at both ends thereof as the end surface portions. Can be.

  INDUSTRIAL APPLICABILITY The present invention can be suitably used, for example, as a structure for attaching equipment to a fuel tank or a hydraulic oil tank of a work machine.

10 Working machines
11 aircraft
17 tank
21 Tank body
22, 61, 62 mounting part
23 Attached object
27 sides
35 Front part, which is the facing part
36 Side face, which is the end face
45 Projection
51 Mounting part body
52, 68, 69 Fixing part L Liquid

Claims (5)

A tank body that is provided on the body of the work machine and stores liquid therein;
A mounting portion provided on the tank body and having a fixing portion to which an object to be mounted is mounted,
The tank body is
An opposing surface facing the object;
An end surface extending at both ends of the opposing surface along a direction intersecting the opposing surface;
A protruding portion that protrudes from the end of the end surface toward the mounted object,
A tank structure for a working machine, wherein the mounting portion is mounted between the projecting portions and is separated from the opposing surface portion, and the object to be mounted is fixed on a side opposite to the opposing surface portion by a fixing portion. The mounting portion includes a mounting portion main body mounted between the protrusions,
The tank structure for a working machine according to claim 1, wherein the fixing portion is separate from the mounting portion main body and is mounted on the mounting portion main body. The tank structure for a working machine according to claim 1, wherein the fixing portion is a fixing hole provided in the mounting portion. The tank structure for a working machine according to any one of claims 1 to 3, wherein the facing surface portion and the end surface portion form a part of a side surface of the tank body. The tank structure for a working machine according to any one of claims 1 to 4, wherein the protruding portion is formed by extending an end of an end face portion.

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