JP2016053286A - Offset type construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an offset type construction machine capable of suppressing interference among a plurality of hoses inserted into a cylinder stay in parallel movement of an offset front.SOLUTION: In an offset type small hydraulic shovel, an offset front 6 includes: a first boom 7 connected to a revolving superstructure 2; a second boom 8 swingably connected to the first boom 7; a cylinder stay 9 attached to the second boom 8 and holding an arm cylinder 14; an arm 10 connected to the cylinder stay 9; a bucket 11 attached to a distal end of the arm 10; a link 10 having one end connected to the first boom 7 and the other end connected to the cylinder stay 9; and an offset cylinder 13 for moving the cylinder stay 9 in right and left directions. The offset front 6 further includes a first hose holding bracket 31 for holding an arm hose 20 and a bucket hose 21 in a predetermined interval provided inside of the cylinder stay 9.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an offset-type construction machine such as an ultra-small turning type small hydraulic excavator provided with an offset front.

  This type of prior art is disclosed in Patent Document 1. The prior art disclosed in this Patent Document 1 is an offset type backhoe, and this offset type backhoe is disposed on the traveling body and the traveling body, and the offset front is connected, and turns within the vehicle width of the traveling body. And a revolving body. A main body is constituted by the traveling body and the revolving body. This prior art can be arranged so that the offset front fits on the revolving structure when the offset front is pulled to the side position of the canopy where the driver seat provided on the revolving structure is arranged.

  The offset front is attached to the second boom, which is connected to the swing body so as to be pivotable in the vertical direction, the second boom is pivotably connected to the first boom, and the second boom. A third boom for holding the arm cylinder, that is, a cylinder stay is provided. The offset front includes an arm connected to the third boom so as to be pivotable in the vertical direction, a work tool such as a bucket attached to the tip of the arm, one end connected to the first boom, and the other end An offset rod, that is, a link that is connected to a third boom that is a cylinder stay, and an offset cylinder that moves the third boom, that is, the cylinder stay, to the left and right via the second boom are provided.

  The offset backhoe configured in this manner is configured such that when the second boom is swung left and right, the arm and the work tool are moved in parallel with respect to the first boom. Although not disclosed in Patent Document 1, in such an offset type construction machine, an arm hose that supplies pressure oil to the arm cylinder and an actuator that drives the work tool during the parallel movement of the offset front. In order to minimize the occurrence of distortion of a plurality of hoses including a hose that supplies pressure oil, the plurality of hoses are piped so as to be inserted into the above-described third boom, that is, into the cylinder stay. To be done.

JP 2001-317077 A

  Even in the offset type backhoe disclosed in the above-described prior art, that is, the offset type construction machine, if a plurality of hoses including the arm hose are piped so as to be inserted into the third boom, ie, the cylinder stay, the offset backhoe is offset. During front translation, the occurrence of multiple hose distortion can be minimized. However, since the plurality of hoses are inserted into the inside of the third boom forming a narrow limited arrangement space, that is, the inside of the cylinder stay, the plurality of hoses interfere with each other during the parallel movement of the offset front, There is a possibility that the durability of these hoses may deteriorate.

  The present invention has been made from the above-described situation in the prior art, and an object of the present invention is to provide an offset type construction machine capable of minimizing interference between a plurality of hoses inserted into a cylinder stay during parallel movement of the offset front. It is to provide.

  In order to achieve this object, the present invention includes a main body and an offset front mounted on the main body, and the offset front is connected to the main body so as to be pivotable in the vertical direction; A second boom coupled to the first boom so as to be swingable in the left-right direction, a cylinder stay attached to the second boom and holding an arm cylinder, and coupled to the cylinder stay so as to be pivotable in the vertical direction. An arm, a work tool attached to the tip of the arm, a link having one end connected to the first boom and the other end connected to the cylinder stay, and an offset cylinder for moving the cylinder stay in the left-right direction. A plurality of hoses including an arm hose for supplying pressure oil for operating the arm cylinder are inserted into the cylinder stay. In offset type construction machine which is adapted, arranged inside said cylinder stay, is characterized by comprising a hose retaining bracket for holding the plurality of hoses at predetermined intervals.

  In the present invention configured as described above, since the hose holding bracket is disposed inside the cylinder stay, the occurrence of distortion of the plurality of hoses held by the hose holding bracket during the parallel movement of the offset front is minimized. Can be suppressed. In addition, since the plurality of hoses are held at predetermined intervals by the hose holding bracket, interference between the plurality of hoses can be suppressed to a low level.

  The offset construction machine according to the present invention includes a hose holding bracket that holds a plurality of hoses at a predetermined interval inside the cylinder stay. Therefore, when the offset front is moved in parallel, the offset type construction machine includes a plurality of hose holding brackets. Interference between hoses can be kept small. Thereby, this invention can improve the durability of the some hose inserted in a cylinder stay, and can implement | achieve a highly reliable offset type construction machine.

It is a side view which shows the small hydraulic excavator which comprises 1st Embodiment of the offset type construction machine which concerns on this invention. It is a perspective view which shows the cylinder stay part with which 1st Embodiment is equipped. It is a principal part expansion perspective view of FIG. It is a figure which shows the state which attached the 1st hose holding bracket to the cylinder stay with which 1st Embodiment is equipped, (a) A figure is a front view, (b) A figure is a perspective view. It is a figure which shows the cylinder stay with which 1st Embodiment is equipped, (a) A figure is a perspective view, (b) A figure is a top view. It is a perspective view which shows the 1st hose holding bracket with which 1st Embodiment is equipped. It is a side view which shows the small construction machine which comprises 2nd Embodiment of this invention. It is a perspective view which shows the cylinder stay part with which 2nd Embodiment is equipped. It is a principal part expansion perspective view of FIG. It is a figure which shows the state which attached the 2nd hose holding bracket to the cylinder stay with which 2nd Embodiment is equipped, (a) A figure is a front view, (b) A figure is a perspective view. It is a perspective view which shows the 2nd hose holding bracket with which 2nd Embodiment is equipped.

DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of an offset type construction machine according to the present invention will be described with reference to the drawings.
[First Embodiment]
The offset construction machine according to the first embodiment is, for example, an ultra-small turning type small hydraulic excavator, and includes a traveling body 1 and a turning body 2 disposed on the traveling body 1 as shown in FIG. I have. The traveling body 1 and the revolving body 2 constitute a main body. A driver's cab 3 in which a driver's seat is arranged is provided on the swivel body 2, and a counterweight 4 is arranged at a rear position. An engine room 5 in which an engine, a hydraulic pump, and the like are housed is disposed at a position near the counterweight 4 below the cab 3. An offset front 6 is connected to the swing body 2.

  The offset front 6 includes a first boom 7 connected to the swing body 2 so as to be pivotable in the vertical direction, a second boom 8 coupled to the first boom 7 so as to be swingable in the left-right direction, and the second boom 8. A cylinder stay 9 that is attached to the boom 8 and holds the arm cylinder 14 is provided. The offset front 6 includes an arm 10 connected to the cylinder stay 9 so as to be pivotable in the vertical direction, a work tool attached to the tip of the arm 10 and driven by a bucket cylinder 15, for example, a bucket 11 and one end. Is connected to the first boom 7 and has a link 12 whose other end is connected to the cylinder stay 9 and an offset cylinder 13 that moves the cylinder stay 9 in the left-right direction.

  In the first embodiment, when the cylinder stay 9 and the second boom 8 are swung left and right by the offset cylinder 13, the arm 10 and the bucket 11 are moved in parallel with respect to the first boom 7. ing. In the first embodiment, the revolving unit 2 is configured to turn within the vehicle width of the traveling unit 1. When the offset front 6 is drawn to the right side of the cab 3 having a driver seat provided on the revolving structure 2, the offset front 6 can be arranged so as to be accommodated on the revolving structure 2.

  As shown in FIGS. 2 to 4, in the first embodiment, a hose holding bracket that holds a plurality of hoses at a predetermined interval inside the cylinder stay 9, that is, an arm hose 20 that supplies pressure oil to the arm cylinder 14, and a bucket A first hose holding bracket 31 that holds bucket hoses 21 that supply pressure oil to the cylinder 15 at predetermined intervals is provided.

  As shown in FIG. 6, the first hose holding bracket 31 is connected to the flat plate portion 31 a disposed so as to face the bottom portion 9 a of the cylinder stay 9 shown in FIG. It has a pair of side part 31b arrange | positioned so that the side part 9b may be opposed.

  As shown in FIGS. 3 and 4, in the first embodiment, the bucket hose 21 is fixed to the flat plate portion 31 a of the first hose holding bracket 31, and the arm hose 20 is held in the first hose. A pair of second fixing brackets 33 that are fixed to the inner surfaces of the pair of side surface portions 31b of the bracket 31 are provided.

  In addition, the first embodiment includes a first fastening portion that fastens the first fixing bracket 32 to the bottom portion 9 a of the cylinder stay 9 via the flat plate portion 31 a of the first hose holding bracket 31. The first fastening portion includes a seat screw 30 having a pair of screw portions 30a shown in FIG. 5 and the like welded to the bottom portion 9a of the cylinder stay 9, a hole formed in the first fixing bracket 32, and a first portion shown in FIG. The bolt 38 is inserted into a hole 31 a 1 formed in the 1 hose holding bracket 31 and screwed into the threaded portion 30 a of the seat screw 30.

  In addition, the first embodiment includes a second fastening portion that fastens each of the two second fixing brackets 33 to the inner surface side of the pair of side surface portions 31 b of the first hose holding bracket 31. As shown in FIG. 6, the second fastening portion is disposed so as to fit in the hole portions 31 b 1 formed in each of the pair of side surface portions 31 b of the first hose holding bracket 31, and on the outer surface side of the side surface portion 31 b. A pair of welded nuts 34 and bolts 35 screwed into the nuts 34 are formed.

  As shown in FIGS. 4 and 5, the cylinder stay 9 is formed with a hole 36 into which each of the arm hoses 20 for supplying pressure oil to the arm cylinder 14 is inserted.

  In the first embodiment configured as described above, since the first hose holding bracket 31 is disposed inside the cylinder stay 9, it is held by the first hose holding bracket 31 during the parallel movement of the offset front 6. Generation of distortion of the arm hose 20 and the bucket hose 21 can be minimized. Moreover, since each of the arm hose 20 and the bucket hose 21 is held at a predetermined interval by the first hose holding bracket 31, interference between the arm hose 20 and the bucket hose 21 can be suppressed to be small. Thereby, this 1st Embodiment can improve the endurance of arm hose 20 and bucket hose 21, and can realize a highly reliable offset type small excavator.

Moreover, this 1st Embodiment can make the 1st hose holding bracket 31 holding the arm hose 20 and the bucket hose 21 into a simple structure which has the flat plate part 31a and the side part 31b, and is rich in practicality. .
[Second Embodiment]
As shown in FIG. 7, the offset construction machine according to the second embodiment is a small construction machine that can also be used as an ultra-small turning type small hydraulic excavator. The external configuration excluding the work tool is, for example, the same as that of the small hydraulic excavator according to the first embodiment described above. In the second embodiment, the work tool attached to the tip of the arm 10 is attached in place of the bucket 11 described above, and includes an optional work tool that can be driven by a bucket cylinder 15 and an option actuator (not shown).

  As shown in FIGS. 8 to 10, in the second embodiment, a hose holding bracket that holds a plurality of hoses at a predetermined interval inside the cylinder stay 9, that is, an arm hose 20, a bucket hose 21, and the above-described option (not shown). A second hose holding bracket 41 that holds the optional hose 22 that supplies pressure oil to the actuator at predetermined intervals is provided.

  As shown in FIG. 11, the second hose holding bracket 41 is connected to the flat plate portion 41a disposed so as to face the bottom portion 9a of the cylinder stay 9 shown in FIG. The cylinder stay 9 has a pair of side surface portions 41b arranged to face the side portion 9a.

  As shown in FIGS. 9 and 10, in the second embodiment, the bucket hose 21 is fixed to the flat plate portion 41a of the second hose holding bracket 41, and the arm hose 20 is held in the second hose. A pair of second fixing brackets 33 that are fixed to the inner surfaces of the pair of side surfaces 41b of the bracket 41, and a pair of third fixings that fix the option hose 22 to the outer surfaces of the pair of side surfaces 41b of the first hose holding bracket 41. A bracket 37 is provided.

  In addition, the second embodiment includes a first fastening portion that fastens the first fixing bracket 32 equivalent to that in the first embodiment described above, and a second fastening portion that fastens the second fixing bracket 33. .

  Furthermore, this 2nd Embodiment is provided with the 3rd fastening part which fastens each of a pair of 3rd fixing bracket 37 to each outer surface side of a pair of side part 41b of the 2nd hose holding bracket 41. As shown in FIG. 11, the third fastening portion is disposed so as to fit in the hole portions 41b2 formed in each of the pair of side surface portions 41b of the first hose holding bracket 41, and is arranged on the inner surface side of the side surface portion 41b. A pair of welded nuts 42 and bolts 43 screwed into the nuts 42 are formed.

  In the second embodiment configured as described above, the second hose holding bracket 41 is disposed inside the cylinder stay 9 as in the first embodiment. The occurrence of distortion of the arm hose 20, the bucket hose 21, and the optional hose 22 held by the two hose holding bracket 41 can be minimized. Moreover, since each of the arm hose 20, the bucket hose 21, and the optional hose 22 is held at predetermined intervals by the second hose holding bracket 41, the arm hose 20, the bucket hose 21, and the optional hose 22 interfere with each other. It can be kept small. Thereby, this 2nd Embodiment can improve durability of arm hose 20, bucket hose 21, and option hose 22, and can realize a highly reliable offset type small construction machine.

  It should be noted that both the first hose holding bracket 31 provided in the first embodiment and the second hose holding bracket 41 provided in the second embodiment are facilitated in advance, and the working tool attached to the tip of the arm 10 is the bucket 11. In this case, the first hose holding bracket 31 is selected, the first hose holding bracket 31 is fixed in the cylinder stay 9, and the arm hose 20 and the bucket hose 21 are held at a predetermined interval by the first hose holding bracket 31. When the work tool attached to the tip of the arm 10 is the optional work tool 16, the second hose holding bracket 41 is selected, the second hose holding bracket 41 is fixed in the cylinder stay 9, and the first 2 Hose holding bracket 41 allows arm hose 20, bucket hose 21, Fine option hose 22 may be allowed to hold at predetermined intervals.

1 Running body (main body)
2 Revolving body (main body)
DESCRIPTION OF SYMBOLS 3 Operation room 4 Counterweight 5 Engine room 6 Offset front 7 1st boom 8 2nd boom 9 Cylinder stay 9a Bottom part 9b Side part 10 Arm 11 Bucket (work implement)
12 Link 13 Offset cylinder 14 Arm cylinder 15 Bucket cylinder 16 Optional work tool (work tool)
20 Arm hose 21 Bucket hose 22 Optional hose 30 Seat screw 30a Threaded portion 31 First hose holding bracket 31a Flat plate portion 31a1 Hole portion 31b Side surface portion 31b1 Hole portion 32 First fixing bracket 33 Second fixing bracket 34 Nut 35 Bolt 36 Hole portion 37 Third fixing bracket 38 Bolt 41 Second hose holding bracket 41a Flat plate portion 41a1 Hole portion 41b Side surface portion 41b1 Hole portion 41b2 Hole portion 42 Nut 43 Bolt

Claims (6)

A main body and an offset front mounted on the main body;
The offset front is attached to the main body, a first boom coupled to the main body so as to be pivotable in the vertical direction, a second boom coupled to the first boom so as to be swingable in the horizontal direction, and the second boom. A cylinder stay holding the arm cylinder, an arm connected to the cylinder stay so as to be pivotable in the vertical direction, a working tool attached to the tip of the arm, one end connected to the first boom, and the other end Comprises a link connected to the cylinder stay and an offset cylinder for moving the cylinder stay in the left-right direction,
In an offset type construction machine in which a plurality of hoses including an arm hose for supplying pressure oil for operating the arm cylinder are inserted into the cylinder stay,
An offset construction machine comprising a hose holding bracket disposed inside the cylinder stay and configured to hold the plurality of hoses at predetermined intervals. The offset type construction machine according to claim 1,
The work implement consists of a bucket,
The plurality of hoses include a bucket hose that supplies pressure oil to a bucket cylinder that operates the bucket,
The offset construction machine according to claim 1, wherein the hose holding bracket comprises a first hose holding bracket for holding the arm hose and the bucket hose at predetermined intervals. The offset construction machine according to claim 2,
The first hose holding bracket includes a flat plate portion disposed so as to face the bottom portion of the cylinder stay, and a side surface portion provided continuously with the flat plate portion and disposed so as to face the side portion of the cylinder stay. Have
A first fixing bracket for fixing the bucket hose to the flat plate portion of the first hose holding bracket;
A second fixing bracket for fixing the arm hose to the side portion of the first hose holding bracket;
A first fastening portion for fastening the first fixing bracket to the bottom portion of the cylinder stay via the flat plate portion of the first hose holding bracket;
An offset construction machine, comprising: a second fastening portion that fastens the second fixing bracket to the side portion of the first hose holding bracket. The offset type construction machine according to claim 1,
The working tool is an optional working tool that is attached in place of the bucket and can be driven by a bucket cylinder and an optional actuator,
The plurality of hoses include a bucket hose that supplies pressure oil to the bucket cylinder, and an option hose that supplies pressure oil to the option actuator,
The offset type construction machine, wherein the hose holding bracket includes a second hose holding bracket that holds the arm hose, the bucket hose, and the optional hose at predetermined intervals. The offset construction machine according to claim 4,
The second hose holding bracket includes a flat plate portion disposed so as to face the bottom portion of the cylinder stay, and a side surface portion provided continuously with the flat plate portion and disposed so as to face the side portion of the cylinder stay. Have
A first fixing bracket for fixing the bucket hose to the flat plate portion of the second hose holding bracket;
A second fixing bracket for fixing the arm hose to the side portion of the second hose holding bracket;
A third fixing bracket for fixing the optional hose to the side surface of the second hose holding bracket;
A first fastening portion for fastening the first fixing bracket to the bottom portion of the cylinder stay via the flat plate portion of the second hose holding bracket;
A second fastening portion for fastening the second fixing bracket to the side portion of the second hose holding bracket;
An offset construction machine comprising a third fastening portion for fastening the third fixed bracket to the side portion of the second hose holding bracket. In the offset type construction machine according to any one of claims 1 to 5,
The main body includes a traveling body, a revolving body disposed on the traveling body, connected to the offset front, and revolving within a vehicle width of the traveling body,
It comprises an ultra-small swivel type small hydraulic excavator that can be arranged so that the offset front fits on the revolving body when the offset front is pulled to a side position of a driver's seat provided on the revolving body. An offset type construction machine characterized by