JP2009270266A - Working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a working machine in which various types of components can be arranged in a space-saving manner without a deterioration in the workability of attachment/detachment of a boom foot pin. <P>SOLUTION: A space S is formed along the attachment direction of the boom foot pin 67 which is attached to a pivot hole 66 of a working device. A bracket 72 is provided in a position to deviate from an attachment position of the boom foot pin 67 in the space S. A fuel filter 71 is attached to a position different from the space S side of the bracket 72. A tool box 87 is detachably attached to the space S. In the attachment/detachment of the boom foot pin 67, the tool box 87 is detached from the space S, so as to prevent the fuel filter 71 from being a hindrance to the operation of the attachment/detachment of the boom foot pin 67 and prevent the deterioration of the workability of the attachment/detachment of the boom foot pin 67. In cases except the operation of the attachment/detachment of the boom foot pin 67, the tool box 87 can be pre liminarily attached to the space S, and the various types of components can be arranged in the space-saving manner. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a work machine provided with a shaft support pin mounted on a shaft support portion of a work device.

  2. Description of the Related Art Conventionally, for example, a working machine such as a hydraulic excavator is provided with an upper revolving unit that is turnable on an upper portion of a lower traveling body, and a work device is provided on the front of the upper revolving unit. The working device includes a boom that is pivotally supported with respect to the upper swing body, an arm that is pivotally supported on the distal end side of the boom, and a pivotable pivot on the distal end side of the arm. The boom, the arm and the attachment are each driven by a hydraulic cylinder which is a fluid pressure actuator.

  The boom foot pin that pivotally supports the boom to the upper swing body is detachable from the side in a state where the swing frame of the upper swing body and the shaft center on the base end side of the boom are aligned.

For this reason, the hydraulic oil tank or fuel tank disposed on the side of the work device on the revolving frame has an extension line of the axis of the boom foot pin so as to form a space for detaching the boom foot pin. In addition, a notch for preventing interference is provided (for example, see Patent Document 1).
Japanese Patent No. 3255576 (page 3, FIG. 4)

  In recent years, with the increase in work in relatively small sites, the demand for small work machines has increased. However, in such a small work machine, it is not easy to take a sufficient space for arranging various parts.

  For this reason, the structure which does not reduce the workability | operativity of boom foot pin attachment / detachment is desired, utilizing the said space for attaching / detaching a boom foot pin effectively.

  The present invention has been made in view of these points, and an object of the present invention is to provide a work machine that can arrange various parts in a space-saving manner without deteriorating the workability of attaching and detaching pins.

  The invention according to claim 1 is a machine body provided with an engine, a work device pivotally supported by the machine body via a shaft support portion, and a shaft support mounted on the shaft support portion of the work device. A space formed along the mounting direction of the pin, a bracket provided at a position shifted from the mounting position of the pin in this space, and a fuel that is attached to a position different from the space side of the bracket and is supplied to the engine A work machine including a fuel filter disposed in a path and a part that is detachably attached to a space.

  According to a second aspect of the present invention, in the working machine according to the first aspect, the working machine includes a working fluid tank that stores a working fluid for driving the working device, and the working fluid tank faces a shaft support portion of the working device with respect to the machine body. The position is provided with a notch, and the bracket is fixed to the end of the notch.

  According to a third aspect of the present invention, in the work machine according to the first or second aspect, the part is a tool box for storing a tool.

  According to the first aspect of the present invention, the bracket is provided at a position shifted from the mounting position of the pin in the space formed along the mounting direction of the shaft support pin mounted on the shaft support portion of the working device. By attaching the fuel filter to a position different from the space side and attaching the parts to the space so that they can be removed, the parts can be removed from the space when removing the pins. In addition, the workability of pin removal / removal is not deteriorated, and components can be mounted in the space except during the pin removal / removal operation, and various components can be arranged in a space-saving manner.

  According to the second aspect of the present invention, the working fluid tank is provided with a notch at a position facing the shaft support for the machine body of the working device, and the bracket is fixed to the end of the notch so that the bracket and the notch A space for mounting a pin can be easily formed between the two.

  According to the third aspect of the present invention, the convenience is improved by using the tool box as the part to be detached from the space.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS.

  As shown in FIGS. 4 and 5, the work machine 11 includes, as a machine body 12, a lower traveling body 13 that can travel by a crawler belt, and a small-swivel upper swing that is provided so as to be able to pivot with respect to the lower traveling body 13. A power unit 17 including a pump unit 16 having an engine 15 and a hydraulic pump such as a main pump and a pilot pump driven by the engine 15, and an operator's cab Is a hydraulic excavator equipped with a cab 18 and a small swivel working device 19 mainly for excavation work.

  In this working device 19, a boom 21 is pivotally supported on the upper swing body 14 so as to be rotatable in the vertical direction. An offset mechanism 22 is provided on the upper portion of the boom 21, and the offset mechanism 22 can be translated in the left-right direction. The arm 23 is pivotally supported so as to be pivotable in the front-rear direction, the bucket 24 is pivotally supported at the tip of the arm 23, and the boom 21 is pivoted in the vertical direction by a boom cylinder 25 as a hydraulic actuator. The arm 23 is translated in the left-right direction by an offset cylinder 26 as a hydraulic actuator provided in the offset mechanism 22 of the boom 21, and rotated in the front-rear direction by an arm cylinder 27 as a hydraulic actuator. It is rotated by a bucket cylinder 29 as a hydraulic actuator via a link mechanism 28.

  The upper swing body 14 of the machine body 12 includes an upper frame 31 that is a swing frame, and the upper frame 31 is pivotally supported by the lower traveling body 13 via a swing bearing portion 32 so as to be rotatable. A cab 18 is mounted on one side of the upper frame 31, and a cooling unit 33 and a plurality of batteries 34, which are cooling devices such as hydraulic fluid, are mounted behind the cab 18. Are equipped with a fuel tank 35 and a hydraulic oil tank 36 which is a working fluid tank, and a control valve 37 is mounted behind these tanks 35 and 36, and a power unit 17 is disposed behind the control valve 37. An arc-shaped counterweight 38 is mounted on the rear end of the upper frame 31, and the upper revolving unit 14 is swung with respect to the lower traveling unit 13 on the rear side of the work device 19 of the upper frame 31. A swing motor 39 as a hydraulic actuator and a swivel joint 40 which is a swing center of the upper swing body 14 are mounted. Further, the upper frame 31 is formed with boom attachment portions 41 and 42 as attachment portions for supporting the base end of the boom 21 which is the shaft support portion of the working device 19 on both sides of the center portion. On the other surface of the fuselage 12, there are a cover C1 that is an exterior cover that covers the fuel tank 35 so that it can be opened and closed, and a cover C2 that is an exterior cover that covers the hydraulic oil tank 36, the control valve 37, etc. An engine hood F, which is an exterior cover that covers the engine 15 and the pump unit 16 so as to be openable and closable, is provided on the surface of the rear portion of the airframe 12.

  The hydraulic oil tank 36 stores hydraulic fluid (hydraulic oil) for driving each cylinder or various fluid pressure actuators of the working device 19, and around the bottom plate 44, a pair of side plates 45, 46 and a pair The end plates 47 and 48 protrude upward and are integrally formed, and the side plates 45 and 46 and the top plate 49 covering the upper portions of the end plates 47 and 48 are integrally formed. A concave notch 50 is formed on the rear upper side of the hydraulic oil tank 36.

  The bottom plate 44 is fixed on the upper frame 31 via a spacer 53. Accordingly, the bottom plate 44 of the hydraulic oil tank 36 is separated from the upper frame 31. In addition, a suction pipe 54 for sucking the working fluid into the pump unit 16 is piped between the bottom plate 44 and the upper part of the upper frame 31.

  The left side plate 45 is positioned to face the fuel tank 35. Further, the right side plate 46 is located toward the outside of the body 12. Further, rectangular cutouts 56 and 57 that define the cutout portion 50 are formed on the rear portions on the upper side of the side plates 45 and 46.

  The rear end plate 48 is positioned below the notch 50 and faces the control valve 37. The end plate 48 is formed with a plurality of ports 58 that are connected to each part of the hydraulic circuit via a hose (not shown) arranged vertically.

  The top plate 49 includes a front top plate portion 61 positioned in front of the cutout portion 50, a front wall portion 62 serving as a front wall portion of the cutout portion 50, and a lower wall portion serving as a lower wall portion of the cutout portion 50. 63.

  A lid 64 that can open and close an opening (not shown) for opening the hydraulic oil tank 36 at the time of maintenance or the like is detachably attached to the front top plate 61. The lid portion 64 is formed at a position facing the outside of the machine body 12 from the opening where the cover C2 is opened.

  The front wall portion 62 is formed in a planar shape in the vertical direction, and is substantially flush with the rear surface 35a of the fuel tank 35. Further, the lower wall portion 63 is formed in a planar shape in the horizontal direction from the lower end portion of the front wall portion 62 to the rear. Therefore, the notch 50 defines a space S that communicates in the left-right direction to the right boom mounting portion 42 behind the fuel tank 35. This space S is formed so that a shaft support hole 66 that is a shaft support portion drilled in the boom mounting portions 41 and 42 can be viewed from the side. That is, as shown in FIGS. 1 and 2, the space S extends along the left-right direction, which is the mounting direction of the boom foot pin 67 that is a pin that pivotally supports the base end side of the boom 21 with respect to the shaft support hole 66. Is formed.

  A fuel filter 71 is attached to the rear portion of the notch 50 via a bracket 72.

  The fuel filter 71 is formed in a substantially cylindrical shape, and is connected to the engine 15 and the fuel tank 35 via supply / discharge hoses 74 and 75. Accordingly, the fuel filter 71 is disposed in the fuel path 77 supplied to the engine 15. The fuel filter 71 is fixed to the rear side of the bracket 72 at a position different from the space S of the bracket 72 by a bolt 78. Therefore, the fuel filter 71 is disposed at a position that avoids the space S.

  The bracket 72 includes a bracket main body 81 that is flat in the vertical direction, and a bracket bent portion 82 that is bent in a rearward direction from the upper end of the bracket main body 81. The lower end portion of the bracket body 81 is fixed by a bolt 85 to an L-shaped mounting bracket 84 welded to the rear portion of the lower wall portion 63, and the fuel filter 71 is disposed on the upper end side of the bracket bent portion 82. Are fixed by bolts 78. Therefore, the bracket 72 is provided at a position shifted from the space S, and is shifted from the shaft support hole 66 (boom foot pin 67) in a side view.

  A tool box 87 as a part is detachably attached to the space S. This tool box 87 is for storing a tool (not shown), and as shown in FIGS. 1 to 3, side plates protruding forward on both sides of a flat plate-like rear plate portion 91 located on the rear side. The portions 92 and 93 are continuous, and the mounting plate portions 94 and 95 protrude from the front end portions of the side plate portions 92 and 93 so as to face the rear plate portion 91 substantially in parallel. Therefore, the tool box 87 is configured such that both upper and lower ends are open and the lower side is closed by the lower wall portion 63. Further, support plates 96 and 97 for supporting the tools accommodated therein are welded to the respective corner portions where the side plate portions 92 and 93 and the mounting plate portions 94 and 95 are continuous. The tool box 87 is formed so that the front and rear dimensions and the vertical dimension are slightly smaller than the space S. For this reason, the tool box 87 is accommodated in the space S.

  The rear plate portion 91 faces the front side of the bracket body 81 of the bracket 72 with the tool box 87 attached to the space S. Further, the rear plate portion 91 is formed with a notch 98 for preventing interference to avoid interference with the bolt 85 at the lower end.

  The front lower portions of the side plate portions 92, 93 are arc portions 99, 100 formed in a substantially arc shape along the shape of the continuous portion of the front wall portion 62 and the lower wall portion 63.

  The mounting plate portions 94 and 95 protrude toward each other from the upper portions of the arc portions 99 and 100 of the side plate portions 92 and 93, respectively. The mounting plate portions 94 and 95 are provided with fixing holes 104 and 105 for fixing to the bosses 102 protruding from the front wall portion 62 into the space S by bolts 103, respectively.

  The fixing hole 104 of the mounting plate portion 94 is formed in a round hole shape, and one is located above the support plate 96 and the other is below the support plate 96.

  The fixing hole 105 of the mounting plate part 95 is formed by cutting out an elongated hole from the end of the mounting plate part 95, and one is located above the support plate 97 and the other is below the support plate 97. .

  The support plates 96 and 97 have horizontal horizontal support plate portions 96a and 97a, and vertical support plate portions 96b and 97b protruding downward from the horizontal support plate portions 96a and 97a substantially vertically.

  The boom foot pin 67 is inserted in the horizontal direction from the space S into the shaft support hole 66 aligned with a hole (not shown) on the base end side of the boom 21 with the cover C2 opened as shown in FIG. The boom 21 (working device 19) is pivotally supported so as to be able to rotate in the vertical direction by being fastened and fixed to the boom mounting portion 42 via a bolt or the like (not shown).

  Next, the function and effect of the embodiment will be described.

  When assembling the work machine 11, the power unit 17, the fuel tank 35, the hydraulic oil tank 36, and the like are mounted on the upper frame 31, and then a hose is connected to connect the working fluid path and fuel on the upper frame 31. Configure the route 77 and the like.

  At this time, the fuel filter 71 is also connected to the fuel path 77 via the hoses 74 and 75. The fuel filter 71 is fixed via a bolt 78 to a bracket 72 fixed by a bolt 85 to a mounting bracket 84 welded in advance to the lower wall portion 63 of the hydraulic oil tank 36.

  In this state, a space S is formed in front of the bracket 72 and at the position of the notch 50 of the hydraulic oil tank 36, and a space for mounting the boom foot pin 67 is secured. Therefore, in a state where the hole on the base end side of the boom 21 is aligned with the shaft support hole 66 of the boom mounting portion 42, as shown by the imaginary line in FIG. Is inserted in the horizontal direction from the side of the upper frame 31 with respect to the shaft support hole 66, and the boom foot pin 67 is fixed to the boom mounting portion 42 with a bolt or the like, so that the boom 21 (working device 19) is fixed to the upper frame. It is pivotally supported with respect to 31 (airframe 12).

  Thereafter, the tool box 87 is attached to the space S which becomes a dead space. At the time of attachment, the fixing holes 104 and 105 are aligned with the boss 102 and bolted with the bolt 103.

  When the boom foot pin 67 is removed, the bolt 103 is loosened to remove the tool box 87 from the space S, the bolt is loosened through the exposed space S, and the boom foot pin 67 is pulled out to the side.

  As described above, according to the above-described embodiment, the boom foot pin 67 of the space S formed along the mounting direction of the boom foot pin 67 mounted in the shaft support hole 66 of the working device 19 (boom 21). A bracket 72 is provided at a position deviated from the mounting position, the fuel filter 71 is mounted at a position different from the space S side of the bracket 72, and the tool box 87 is detachably mounted in the space S, so that the boom foot pin 67 can be removed. In this case, the tool box 87 is removed from the space S, so that the fuel filter 71 does not hinder the work for removing the boom foot pin 67, and the workability for removing the boom foot pin 67 is not deteriorated. The tool box 87 can be attached to the space S except when the boom foot pin 67 is attached / detached, and various parts can be arranged in a space-saving manner. Further, the boom foot pin 67 can be attached and detached without touching the fuel line such as the fuel filter 71, and the workability is good.

  Further, the boom foot pin 67 can be attached with the fuel filter 71 fixed, and the assemblability is improved. That is, since the fuel filter 71 is independently attached to the hydraulic oil tank 36, the workability of attaching the boom foot pin 67 is improved. For example, the fuel filter 71 connected to the fuel path 77 is attached to the boom foot pin 67. It is not necessary to remove it at the time of operation, and man-hours can be reduced.

  Further, a notch 50 is provided in the hydraulic oil tank 36 at a position facing the shaft support hole 66 with respect to the machine body 12 of the work device 19, and the bracket 72 is fixed to the end of the notch 50 so that the bracket 72 and the notch A space S for mounting the boom foot pin 67 can be easily formed between the portion 50 and the portion 50.

  Further, since the space S is exposed at the opening where the cover C2 is opened, the workability of removing the boom foot pin 67 is good.

  The convenience is improved by using the tool box 87 as a part to be attached to and detached from the space S.

  In each of the above embodiments, the space S can be configured such that any part other than the tool box 87 can be attached and detached.

  Further, the work device 19 may be one that does not include the offset mechanism 22.

  Further, as the work machine 11, any work other than the hydraulic excavator can be applied as long as the work machine 11 is configured to pivotally support a rotatable work device.

It is a top view which shows the principal part of one Embodiment of the working machine which concerns on this invention. It is a side view which shows the principal part of a working machine same as the above. It is a perspective view which shows the tool box of a working machine same as the above. It is a side view which shows a working machine same as the above. It is a top view which shows a working machine same as the above.

Explanation of symbols

S space
11 Work machines
12 Airframe
15 engine
19 Work equipment
36 Hydraulic oil tank that is a working fluid tank
50 Notch
66 Shaft support hole
Boom foot pin which is 67 pins
71 Fuel filter
72 Bracket
77 Fuel path
87 Toolbox as a part

Claims (3)

An aircraft equipped with an engine,
A working device that is pivotally supported with respect to this machine body via a pivotal support;
A space formed along the mounting direction of the shaft support pin mounted on the shaft support portion of the working device;
A bracket provided at a position shifted from the pin mounting position in this space;
A fuel filter mounted at a position different from the space side of the bracket and disposed in a fuel path supplied to the engine;
A work machine comprising: a part detachably attached to a space. A working fluid tank for storing working fluid for driving the working device;
The working fluid tank has a notch at a position facing the shaft support for the machine body of the working device,
The work machine according to claim 1, wherein the bracket is fixed to an end of the notch. The work machine according to claim 1, wherein the component is a tool box for storing a tool.

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