JP2004100173A - Hydraulic piping structure of lateral swing type work unit device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hydraulic piping structure of a lateral swing type work unit device in which the whole length of a hose can be reduced by directly connecting the hydraulic hose to a boom cylinder without making a detour. <P>SOLUTION: A swing bracket (16) has a first piping duct (42) communicating with the outside space of a boom cylinder mounting part (32) from the inside space (38) and a second piping duct (48) communicating with the outside space of the boom mounting part (33). A hydraulic hose (40) laid from the upper revolving inside through the first piping duct (42) is fixed by a first fixing clamp (49) in the neighborhood of a boom cylinder connection pin (39). Hydraulic hoses (43, 44) for each cylinder except a boom cylinder (20) laid through the second piping duct (48) are fixed in the neighborhood of a boom mounting shaft (17a) by the second fixing clamp (50) to connect to each hydraulic cylinder. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
According to the present invention, a swing bracket is attached to a front end portion of an upper revolving structure of a turning work vehicle so as to be swingable in the left-right direction, and a boom, an arm and a work tool (bucket, etc.), the boom, the arm, The present invention relates to a hydraulic piping structure of a left-right swing-type working machine device equipped with a working machine device having a plurality of hydraulic cylinders for respectively driving tools.
[0002]
[Prior art]
In a turning work vehicle such as a hydraulic shovel having the working machine device attached to a swing bracket, a hydraulic hose pipe for each hydraulic cylinder of a boom, an arm, and a bucket of the working machine device is connected from the inside of the upper swing body to the inside of the swing bracket. Along with passing into the space, multiple hydraulic hoses passed into this internal space are combined in parallel and fixed to the swing bracket in an integrated state, and then bent to the upper side of the boom up / down fulcrum attached to the upper part of the swing bracket. A pipe is connected to each of the hydraulic cylinders. (For example, see Japanese Utility Model Publication No. Hei 7-12445)
[0003]
[Problems to be solved by the invention]
According to the conventional hydraulic piping, the hydraulic hose for the boom cylinder is guided to the upper side of the swing bracket through the internal space of the swing bracket, and is bent so as to be bent and displaced vertically at the position on the upper side of the boom cylinder, thereby forming the upper surface of the boom. And connected to a fixed pipe provided on the boom, and further connected to a boom cylinder via a relay hydraulic hose provided from the fixed pipe to the boom cylinder.
Therefore, not only the hydraulic hose for the boom cylinder is too long, but also the fixed piping and the relay hydraulic hose are exposed around the boom cylinder before reaching the boom cylinder. Or the relay hydraulic hose is likely to be damaged.
[0004]
Further, according to the conventional hydraulic piping structure, the displacement of the hydraulic hose that moves as the swing of the swing bracket swings is absorbed by a change in the radius of curvature of the hose portion disposed so as to be bent substantially in an arc shape. This absorbing means is such that the radius of curvature changes while the arc end of the hose connected to the swing bracket side moves left and right as the swing of the swing bracket swings. The movement is combined with the displacement of the hydraulic hose. Therefore, it is necessary to increase the hydraulic hose piping space inside the upper rotating body for arranging the hydraulic hose in an arc shape. However, this hydraulic hose piping space is usually greatly restricted for installation of equipment and the like, and therefore, there is a problem that it is difficult to arrange the hydraulic hose in an arc shape in the piping space.
[0005]
Further, the hose portion having the arcuate bending moves and displaces while rubbing against the upper and lower or left and right wall surfaces, so that there is a problem that the wear of the hydraulic hose is accelerated.
[0006]
Furthermore, the hose portion of the hydraulic hose having an arcuate bending is laid so that it can be displaced left, right, up and down, so that when the hose is freely displaced, the hoses are entangled or rubbed, and the durability of the hydraulic hose is improved. There is a damaging problem.
[0007]
In order to solve the above-mentioned problems, the present invention makes it possible to shorten the entire length of a hydraulic hose for a boom cylinder among hydraulic hoses that pass from the inside of the upper swing body to the internal space of the swing bracket, and to reduce the curved piping space of the hydraulic hose. The object of the present invention is to provide a hydraulic piping structure of a left-right swing type working machine device that avoids enlargement and prevents entanglement and rubbing between hoses and contact with a floor where the hoses are arranged when the bending state of the hydraulic hoses changes. And
[0008]
[Means for Solving the Problems, Functions and Effects]
In order to achieve the above object, a first aspect of the present invention provides a swing work vehicle, in which a swing bracket is attached to a front end of an upper swing body so as to be swingable about a vertical axis, and a boom, an arm, and a work tool are attached to the swing bracket. The boom, the arm, and a working machine device equipped with a hydraulic cylinder for driving the working tool, respectively, are attached, and from the plurality of control switching valves provided inside the upper revolving unit, the respective hydraulic hoses are respectively passed via the swing bracket. In the hydraulic piping structure of the left and right swing type working machine device connected to the hydraulic cylinder, the swing bracket is for laying a hydraulic hose for a boom cylinder from an internal space of the swing bracket to an external space of a boom cylinder mounting portion. Hydraulic hoses for arm cylinders, work implement cylinders, etc. are placed in the first piping arrangement passage and the outer space of the boom mounting portion. It has a configuration and a second pipe placement channel for laying the scan.
[0009]
According to the first invention, only the hydraulic hose for the boom cylinder is laid directly from the dedicated arrangement passage provided in the swing bracket to the vicinity of the connection pin of the boom cylinder mounting portion, so that the piping length of the hydraulic hose for the boom cylinder is reduced. Short and compact installation. Thereby, the hydraulic hose for the cylinder other than the hydraulic hose for the boom cylinder can be installed separately from the hydraulic hose, and only the hydraulic hose for the boom cylinder is prevented from being bent and damaged by the swing of the swing bracket as in the related art.
[0010]
According to a second aspect of the present invention, in the first aspect, the boom cylinder hydraulic hose laid from the inside of the upper revolving structure via the internal space of the swing bracket and the first piping arrangement passage, the boom cylinder and the swing bracket The hydraulic hoses for the arm cylinder and the working tool cylinder, etc., which are fixed near the connecting pin by a first fixing clamp and laid via the internal space of the swing bracket and the second piping arrangement passage, are connected to the boom. And the swing bracket are fixed to the vicinity of a shaft by a second fixing clamp and connected to the respective hydraulic cylinders.
[0011]
According to the second invention, only the hydraulic hose for the boom cylinder is laid directly from the first dedicated arrangement passage provided on the swing bracket to the vicinity of the connection pin of the boom cylinder mounting portion, and is fixed by the first fixing clamp. At the same time, a hydraulic hose for the cylinder other than the hydraulic hose for the boom cylinder is laid directly from the second dedicated arrangement passage provided on the swing bracket to the vicinity of the connecting pin of the boom mounting portion, and is fixed by the second fixing clamp. Therefore, the piping length of the hydraulic hose for the boom cylinder and the hydraulic hose for the other cylinder is shortened to reduce the amount of deflection of the piping between the swing bracket and the boom cylinder and between the swing bracket and the other cylinder. be able to. Thereby, when the boom and the boom cylinder swing, the respective hydraulic hoses are not bent and damaged, and the durability can be improved.
[0012]
According to a third invention, in the second invention, a pipe fixing clamp member for binding and fixing the hydraulic hoses from the plurality of control switching valves to a pipe space inside the upper revolving structure and the pipe fixing clamp member. Each of the hydraulic hoses is provided with a piping guide member that restricts the movement in the lateral direction of the hose and guides the movement in the longitudinal direction of the hose so as to pass into the internal space of the swing bracket.
[0013]
According to the third invention, the curved laying section of the hydraulic hose immediately before passing from the plurality of control switching valves inside the upper swing body to the internal space of the swing bracket is held by the pipe fixing clamp member and the pipe guide member. The return of the bent hose portion due to the reaction force can be suppressed. Also, when the hydraulic hose is pulled or pushed and moved with the swing of the swing bracket, the movement in the lateral direction of the hose is restricted by the piping guide member, and the movement in the longitudinal direction of the hose is guided. In addition, the amount of bending of the curved hose portion changes smoothly and the hydraulic hoses do not become entangled or engaged with each other, so that damage to the hose can be prevented.
[0014]
In a fourth aspect based on the third aspect, the pipe fixing clamp member is installed on an aerial mount provided at an aerial position in a pipe space inside the upper revolving unit, and a hose between the pipe guide member and the pipe is connected to the pipe. It is configured to be fixed away from the upper and lower surfaces of the space.
[0015]
According to the fourth invention, even when the hydraulic hose moves due to the displacement of the curved hose portion, the hydraulic hose touches the upper and lower wall surfaces in the piping space since the hydraulic hose moves away from the upper surface and the lower surface of the piping space inside the upper rotating body. There is no. For this reason, the hydraulic hose is not damaged by friction, and the durability can be improved.
[0016]
According to a fifth aspect, in the fourth aspect, the pipe guide member has two upper and lower insertion portions through which the hydraulic hoses are inserted in one horizontal row, respectively, and the pipe fixing clamp member clamps the hydraulic hoses in two vertical rows. It has a clamp part, and has a configuration in which the hose between the pipe guide member and the pipe fixing clamp member is laid so as not to overlap.
[0017]
According to the fifth invention, since the pipe fixing clamp member has the binding clamp portions in two vertical rows, and the pipe guide member has two upper and lower insertion portions through which the hydraulic hoses are inserted in one horizontal row, respectively. Since the curved hose portions are spaced at predetermined intervals in the vertical direction by the two vertically arranged binding clamp portions, the curved hose portions cross over the piping guide member in a line in the left-right direction, so that the curved hose portions do not overlap with each other. For this reason, when the hydraulic hoses move during the swing of the swing bracket, they do not rub against each other, so that the hydraulic hoses move smoothly and hardly get tangled, and the durability of each hydraulic hose can be improved.
[0018]
According to a sixth aspect of the present invention, in the fifth aspect, only the boom cylinder hydraulic hose of the hydraulic hose is clamped to the lowest row of the two vertical binding clamp portions of the piping fixing clamp member, and the piping guide is provided. It is configured to be inserted through the lower insertion portion of the member and laid separately from the hydraulic hoses for the arm cylinder and the working tool cylinder.
[0019]
According to the sixth invention, by using the swing bracket as in the first invention, a fixed clamp for fixing the boom cylinder hydraulic hose at a position different in the radial direction from the swing center, and a boom cylinder hydraulic hose other than the boom cylinder hydraulic hose Since the fixed clamps for fixing the hydraulic hoses for the arm cylinders and for the working tool cylinders such as buckets and accessory working tools are respectively positioned, there is a difference in the movement strokes of both hydraulic hoses accompanying the swing of the swing bracket. By laying only the hydraulic hose for the boom cylinder separately, damage due to friction can be avoided.
[0020]
In a seventh aspect based on any one of the third to sixth aspects, the pipe fixing clamp member is attached rotatably about a substantially vertical axis in accordance with the bending displacement of the hydraulic hose. It has a configuration.
[0021]
According to the seventh invention, the piping fixing clamp member is rotated by the reaction force of the bending and pushing applied to the curved hose portion with the swing of the swing bracket. The displacement is reduced, the entanglement between the hoses can be eliminated, and no excessive external force is applied to the curved hydraulic hose portion, so that the durability of the hydraulic hose can be improved.
[0022]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0023]
First, a configuration of a swing hydraulic excavator will be described with reference to FIG. 1 as an example of a turning work vehicle equipped with a left-right swing type working machine device to which the present invention is applied. FIG. 1 is a side view showing a turning work vehicle equipped with a left-right swing type working machine device according to the present invention.
The turning work vehicle has an upper turning body 12 equipped with a work machine device 11 rotatably mounted above a crawler-type traveling device 10. The upper revolving unit 12 includes, in addition to the work implement device 11, a cab 13 in which various operation means for performing a traveling operation of the turning work vehicle and a work operation of the work implement device 11 are installed, and a power for the traveling and work. An engine 14 serving as a power source, a hydraulic device (not shown) for supplying hydraulic power generated by the engine 14 to the crawler-type traveling device 10 and the work implement device 11, and a counterweight 15 for stabilizing the vehicle body. Yes.
[0024]
The work machine device 11 is attached to a swing bracket 16 provided at the front end of the upper swing body 12 so as to be swingable about a vertical axis. The work machine device 11 includes a boom 17 having a base connected to the swing bracket 16 with a pin, an arm 18 having a base connected to a tip of the boom 17, and a bucket having a base connected to the tip of the arm 18. And a hydraulic cylinder between the swing bracket 16 and the boom 17 such that the boom 17 is raised and lowered, the arm 16 is raised and lowered, and the operation of the bucket 19 is obtained. A boom cylinder 20 comprising a hydraulic cylinder between the boom 17 and the arm 18 and a bucket cylinder 22 comprising a hydraulic cylinder between the arm 18 and the bucket 19. I have.
[0025]
A hydraulic hose connected to a control switching valve (see FIG. 6 described later) for each cylinder installed inside the upper revolving unit 12 is connected to the boom cylinder 20, the arm cylinder 21, and the bucket cylinder 22. Each connection is made via the internal space of the bracket 16.
[0026]
Next, with respect to the improved hydraulic hose piping structure in the left-right swing type working machine device of the turning work vehicle, the piping arrangement structure of the swing bracket will be described first with reference to FIGS. FIG. 2 is a side view of the swing bracket according to the present invention, and FIG. 3 is an X view of FIG.
The swing bracket 16 includes a main portion 25 having a Y-shape in a side view and having walls 26, 27, and 29 that are branched in three stages vertically and protruded in the horizontal direction. The upper branch wall 26 and the middle branch wall 27 are paired to form a female connecting portion 28, and the lower branch wall 29 forms a male connecting portion 30. Further, a boom cylinder attachment portion 32 for attaching the boom cylinder 20 to the front surface of the vertical wall 31 of the main body portion 25 and a boom attachment portion 33 for attaching the boom 17 to the upper surface of the upper branch wall 26 are integrally formed. ing. Between the upper branch wall 26 and the middle branch wall 27 of the female connecting portion 28, a male receiving base 35 projecting horizontally from the front end of the upper rotating body 12 is fitted. A pair of upper and lower female receiving members 36a of a female receiving base 36 provided at the front end of the upper revolving structure 12 below the male receiving base 35 and projecting horizontally at predetermined intervals in the vertical direction. , 36b, and the female connecting part 28 and the male receiving base 35 are paired, and the male connecting part 30 and the female receiving base 36 are paired. Connected. The space between the vertical axes 34 and 37 is an internal space 38 for passing a hydraulic cylinder hose inside the swing bracket 16.
[0027]
A communication hole 41 is formed in the vertical wall 31 between the middle branch wall 27 and the lower branch wall 29 to communicate the internal space 38 with the external space near the connecting pin 39 of the boom cylinder mounting portion 32. To form a first piping arrangement passage 42, and from the internal space 38 to the external space near the connecting pin 39 of the boom cylinder mounting portion 32 via the communication hole 41, the hydraulic hose 40 for the boom cylinder (the (The two return hoses are denoted by one reference number). In the middle branch wall 27 and the upper branch wall 26, communication holes 46 and 47 for communicating the internal space 38 with the external space near the boom mounting shaft 17 a of the boom mounting portion 33 are opened, respectively, to form second holes. A pipe arrangement passage 48 is formed, and an arm, a bucket, and an auxiliary working tool (see FIG. 1) are connected from the internal space 38 to the external space near the boom mounting shaft 17a of the boom mounting portion 33 via the communication holes 46 and 47. (Not shown) hydraulic hoses 43, 44, 45 for each cylinder (two hoses are represented by one reference number).
[0028]
Further, a first fixed clamp portion 49 for connecting and fixing the boom cylinder hydraulic hose 40 is provided at a position near the connecting pin 39 of the boom cylinder mounting portion 32, and a position near the boom mounting shaft 17a of the boom mounting portion 33. In addition, a second fixed clamp portion 50 is provided for jointly securing the hydraulic hoses 43, 44, 45 for the cylinders of the arm, the bucket, and the accessory working tool.
[0029]
FIG. 4 is a cross-sectional view taken along the line AA of FIG. 3 and shows a cross-sectional view of the first fixed clamp portion. FIG. 5 is a cross-sectional view of the second fixed clamp portion.
As shown in FIG. 4, the first fixed clamp 49 for fixing the boom cylinder hydraulic hose 40 has a clamp member 52 to which a rubber cushion 51 for holding the hydraulic hose is attached. The rubber cushion 51 is fitted into the communication hole 41 on the front surface of the swing bracket 16, and the clamp member 52 is fixed to the front surface of the communication hole 41 by the bolt 55.
Further, as shown in FIG. 5, a fixed clamp portion 50 for fixing the hydraulic hoses 43, 44, 45 for the cylinders of the arm, the bucket and the accessory working tool is provided in a rubber cushion 53 for holding the hydraulic hoses. Hydraulic hoses 43, 44, 45 for each cylinder other than the boom such as an arm, a bucket, and an attached work tool are inserted in one row side by side, and the rubber cushion 53 is formed on a pair of fixed portions formed on the upper surface of the upper branch wall 25. The clamp plate 54 is fixed to the pair of fixing portions 57, 57 by bolts 56, 56 while holding the clamp plate 54 from above the rubber cushion 53.
[0030]
As shown in FIG. 2, the piping in the swing bracket 16 configured as described above is such that hydraulic hoses for the respective cylinders are passed from the upper inside of the revolving structure 60 to the internal space 38 of the swing bracket 16, and the boom cylinder therein. Only the hydraulic hose 40 is connected to the boom cylinder 20 via the first piping arrangement passage 42 formed in the swing bracket 16 and near the connecting pin 39 of the boom cylinder mounting portion 32, and is connected to the arm other than the boom cylinder 20. The hydraulic hoses 43, 44, 45 for the cylinders, such as the bucket, the accessory working tool, and the like, pass through the second piping arrangement passage 48 formed in the swing bracket 16, pass through the vicinity of the boom mounting shaft 17 a of the boom mounting part 33, and They are connected to the cylinders 21 and 22 such as the arm 18, the bucket 19 and the accessory working tool.
[0031]
In the anchoring of the hydraulic hose to the working machine swing bracket 16 described above, the hydraulic hose is pulled or pushed in accordance with the left and right swing of the working machine swing bracket 16, so that the hydraulic hose is bent in advance and laid. Further, the external force of the pulling or pushing is absorbed by the displacement of the curved portion. The position of the bending portion of the hydraulic hose is provided in a piping space inside the upper rotating body.
Next, a piping arrangement configuration obtained by improving the arrangement of the curved portion will be described with reference to FIGS. FIG. 6 is a side view showing a hydraulic piping structure of the working machine device, and FIG. 7 is a plan view of FIG.
[0032]
The upper revolving unit 12 is provided between the male cradle 35 and the female cradle 36 provided at the front end of the revolving unit for supporting the work machine swing bracket 16 described above, toward the internal space 38 of the swing bracket 16. It has an open hydraulic hose outlet 61 and, behind the hydraulic hose outlet 61, a piping space 62 for bending and disposing the hydraulic hose inside the upper swing body. In the piping space 62 inside the upper revolving structure, a control switching valve 63 for a boom cylinder, a control switching valve 64 for an arm cylinder, a control switching valve 65 for a bucket cylinder, A pipe fixing clamp member 67 for binding and fixing two hydraulic hoses 40, 43, 44, 45 connected to the control switch valve 66, and the swing bracket 16 positioned at the hydraulic hose outlet 61. And a piping guide member 68 for passing each of the hydraulic hoses 40, 43, 44, 45 into the internal space 38 of the first embodiment. The hydraulic hoses 40, 43, 44, and 45 are bent and laid between the pipe fixing clamp member 67 and the pipe guide member 68, and transferred to the internal space 38 of the swing bracket 16. I am trying.
[0033]
FIG. 8 is a front view showing a piping guide member, and FIG. 9 is a front view showing a piping fixing clamp member.
As shown in FIG. 8, the pipe guide member 68 has two upper and lower insertion portions 70 and 71 through which hydraulic hoses are inserted in one horizontal row. In the present embodiment, two upper and lower insertion portions are formed by horizontal pipe members. The insertion portions 70 and 71 are partitioned. As shown in FIG. 9, the pipe fixing clamp member 67 fixes an outer peripheral portion of a rubber cushion 72 having a plurality of hydraulic hose insertion holes in two vertical rows with a binding clamp portion 73.
The laying of the curved hose is performed by clamping one side of the curved end of the curved hose portion at a predetermined interval in the vertical direction by the vertical two rows of pipe fixing clamp members 67 and the other end of the curved end of the curved hose portion. The upper side is passed through the upper and lower two horizontal rows of insertion portions 70 and 71 formed by the pipe guide member 68. Thus, the respective curved hose portions are disposed in the pipe space in a suspended state without being overlapped.
[0034]
Since the pipe fixing clamp member 67 and the pipe guide member 68 are located at both ends of the hydraulic hose bending portions and maintain the hose bending state, the return of the bending is suppressed, and the pipe is held in the piping space 62 in the added bending posture. It is possible to keep the curved hose section. When each of the hydraulic hoses is pulled or pushed with the swing of the swing bracket 16, the piping guide member 68 suppresses a change in the curvature radius of curvature due to radial displacement (lateral displacement) of each of the hydraulic hoses. Each hydraulic hose is moved in the axial direction to guide the amount of deflection at the curved hose portion so as to increase or decrease. As a result, the displacement of the hydraulic hose caused by the swing of the swing bracket 16 is absorbed.
[0035]
Further, the pipe fixing clamp member 67 is installed on an aerial pedestal 69 provided at an aerial position in the pipe space 62 inside the upper revolving unit, and a curved hose portion between the pipe guide member 68 is suspended in the air. It is arranged like this. Then, even if the hydraulic hose moves due to the displacement of the curved hose portion, the hydraulic hose does not touch the upper and lower wall surfaces of the piping space inside the upper rotating body.
[0036]
Further, of the respective hydraulic hoses, only the boom cylinder hydraulic hose 40 is clamped to the lowest row of the vertical two-row clamp section of the pipe fixing clamp member 67, and is inserted into the lower insertion section 71 of the pipe guide member 68. It is laid separately from the hydraulic hoses for the cylinders of the arm, bucket, and accessory working tool. Accordingly, the hydraulic hose 40 for the boom cylinder passes through a different laying route from the hydraulic hoses 43, 44, 45 for the other cylinders other than the boom cylinder. Entanglement with the hydraulic hose is eliminated.
[0037]
In addition, with the above configuration, the fixed clamp for fixing the hydraulic hoses for the cylinders of the arm, the bucket, and the accessory tool, and the fixed clamp for fixing the hydraulic hoses for the boom cylinder are arranged in a radial direction from the swing center. Are different from each other, the movement stroke of the hydraulic hose accompanying the swing of the swing bracket is different, and only the hydraulic hose 40 for the boom cylinder is used as the hydraulic hose 43, 44 for the cylinder of the arm, the bucket, and the accessory working tool. , 45. Despite this different movement, the boom cylinder hydraulic hose 40 is passed through the lower insertion portion 71 of the pipe guide member 68, and is positioned at the lowest position in the pipe space 62 by the pipe fixing clamp member 67. Since the hydraulic hoses 43, 44 and 45 are laid apart from the hydraulic hoses 43, 44 and 45 for the cylinders, the hydraulic hoses 40 for the boom cylinders and the hydraulic hoses 43, 44 and 45 for the cylinders of the arm, the bucket and the accessory working tool are rubbed. Disappears.
[0038]
As shown in FIG. 9, the pipe fixing clamp member 67 is mounted on the aerial mount 69 so as to be swingable about a rotary shaft 75 having a substantially vertical axis provided at a lower portion thereof. . As a result, as the swing of the swing bracket swings, the pipe fixing clamp member 67 swings left and right in response to the reaction force of the bending and pushing applied to the curved hose portion. The entire hose is easily swung while keeping the curved state substantially, and the hoses are not entangled with each other.
[0039]
As described above, the control switching valves 63, 64, 65, 66 for the boom, the arm, the bucket, and the accessory working machine are stacked and arranged in order from the lower stage to the upper stage inside the upper revolving unit. The two hydraulic hoses 40, 43, 44, and 45, respectively, coming out of the control switching valves 63, 64, 65, and 66 are respectively connected to the pipe fixing clamp members 67 by the vertical two-row binding clamp portion 73. From the lower stage to the upper stage, the hydraulic hoses for the cylinders of the boom, the arm, the bucket, and the accessory working machine are clamped in the order of the hydraulic hoses for the cylinders and spatially positioned in the piping space 62. Further, the hydraulic hoses 43, 44, 45 for the cylinders of the arm, the bucket, and the accessory working machine are bent in a curved shape so as to be inserted into the upper insertion portion 70 of the pipe guide member 68 in the positioning order of the two-row binding clamp portion 73. At the same time, the boom cylinder hydraulic hose 40 is bent in a curved shape while being inserted side by side into the lower insertion portion 71 of the pipe guide member 68, and passed into the internal space 38 of the swing bracket 16.
[0040]
Then, the hydraulic hoses 43, 44, 45 for the cylinders of the arm, bucket, and work implement are fixedly positioned near the boom mounting shaft 17a of the boom mounting portion 33 through the second piping arrangement passage 46 in the swing bracket 16. Further, the hydraulic hose 40 for the boom cylinder is connected to the arm cylinder 21, the bucket cylinder 22, and other working tool cylinders (not shown) through the first piping arrangement passage 42 in the swing bracket 16. The boom cylinder mounting portion 32 is connected to the boom cylinder 20 after being fixedly positioned near the connection pin 32.
[0041]
The present invention is configured as described above, and has the following effects.
[0042]
The hydraulic hose for the boom cylinder in the swing bracket is arranged separately from the hydraulic hoses for the other cylinders, via the arrangement passage provided in the swing bracket, and near the connecting pin of the boom cylinder. Since the hose is arranged directly on the boom cylinder, there is an effect that the length of the hose is reduced as compared with the related art. In addition, since the hydraulic hose for the boom cylinder is fixed to the position near the connecting pin of the boom cylinder by the fixing clamp, the amount of bending of the hydraulic hose for the boom cylinder which is bent with the vertical swing of the boom cylinder can be reduced. In addition, damage due to contact with external obstacles can be prevented.
[0043]
In addition, since the bending arrangement of the hydraulic hose on the swing bracket is maintained by the piping fixing clamp members and the piping guide members provided at both ends of the hose bending portion, the return of the bending is suppressed, and It is possible to keep the curved hose portion in the piping space in the bent posture.
When each of the hydraulic hoses is pulled or pushed and starts moving as the swing bracket swings, the piping guide member guides each of the hydraulic hoses to move substantially in the direction of the hose axis. Works to increase or decrease the amount of deflection of the hydraulic hose, and can absorb the displacement of the hydraulic hose due to the swing of the swing bracket. For this reason, the piping space inside the upper rotating body may be a space in which the range of increase or decrease in the amount of deflection of the curved hose portion falls, and the piping space can be made narrower than before.
[0044]
Also, since the pipe fixing clamp member is erected at an aerial position in the pipe space inside the upper revolving structure, and the curved hose part is arranged in a suspended state, even if the hydraulic hose moves due to displacement of the curved hose part, Since the hydraulic hose does not touch the upper and lower wall surfaces of the piping space inside the upper revolving unit, the hose can be prevented from being damaged due to friction with the upper and lower wall surfaces.
[0045]
In addition, the curved hose portion suspended in the air spans the binding clamp portion in two vertical rows and the piping guide member in one horizontal row so that the curved hose portions do not overlap, so that the hose is displaced in a curved state. The resistance at the time can be eliminated, and entanglement can be prevented.
[0046]
Also, since the hydraulic hose for each cylinder and the hydraulic hose for the boom cylinder for the arm, bucket, and accessory work tool are vertically separated, they can be moved even if there is a difference in both hose movements due to the swing of the swing bracket. And no damage due to rubbing can be avoided.
[0047]
Further, when a bending displacement force is applied to the bent portion of the hydraulic hose, the pipe fixing clamp member swings left and right about the vertical axis due to the reaction force of the hose, so that the hydraulic hose swings while maintaining the bent state. It is easy to move and can prevent entanglement between hydraulic hoses.
[0048]
Further, the hydraulic hoses reaching the hydraulic cylinders from the control switching valves can be arranged in a line by the pipe fixing clamp member and the pipe guide member without intersecting on the way.
[Brief description of the drawings]
FIG. 1 is a side view of a turning work vehicle to which the present invention is applied.
FIG. 2 is a side view of the swing bracket according to the present invention.
FIG. 3 is an X view of FIG. 2;
FIG. 4 is a sectional view taken along line AA of FIG. 3;
FIG. 5 is a cross-sectional view of an arm, a bucket, and a hydraulic hose fixing clamp portion for an accessory working tool cylinder configured in a swing bracket.
FIG. 6 is a side view showing a hydraulic piping structure of the work machine device.
FIG. 7 is a top view similarly.
FIG. 8 is a front view showing a piping guide member.
FIG. 9 is a front view showing a pipe fixing clamp member.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Crawler type traveling device, 11 ... Work equipment device, 12 ... Upper revolving unit, 13 ... Driver cab, 14 ... Engine, 15 ... Counter weight, 16 ... Swing bracket, 17 ... Boom, 17a ... Boom mounting shaft, 18 ... Arm, 19 ... Bucket, 20 ... Boom cylinder, 21 ... Arm cylinder, 22 ... Bucket cylinder, 25 ... Main part, 26 ... Upper branch wall, 27 ... Middle branch wall, 28 ... Female connection part, 29 ... Lower branch wall , 30 ... male connecting portion, 31 ... vertical wall, 32 ... boom cylinder mounting portion, 33 ... boom mounting portion, 34 ... vertical axis, 35 ... male cradle, 36 ... female cradle, 37 ... vertical axis, 38: internal space, 39: connecting pin, 40: hydraulic hose for boom cylinder, 41: communication hole, 42: piping arrangement passage, 43.44.45 ... hydraulic hose for arm, bucket, attached work tool cylinder, 46. 7 ... communication hole, 48 ... piping arrangement passage, 49 ... fixed clamp part, 50 ... fixed clamp part, 51 ... rubber cushion, 52 ... clamp member, 53 ... rubber cushion, 54 ... clamp plate, 60 ... inside the upper revolving unit , 61: Hydraulic hose outlet, 62: Piping space, 63: Control switching valve for boom cylinder, 64: Control switching valve for arm boom cylinder, 65: Control switching valve for bucket cylinder, 66: Control switching for attached work tool cylinder Valve, 67: piping fixing clamp member, 68: piping guide member, 69: aerial mount, 70: upper insertion portion, 71: lower insertion portion, 72: rubber cushion, 73: binding clamp portion, 75: rotating shaft.

Claims (7)

A swing bracket (16) is attached to the front end of the upper revolving superstructure (12) of the turning work vehicle so as to be swingable about a vertical axis. (19) and a work machine device (11) including hydraulic cylinders (20, 21, 22) for driving the boom (17), the arm (18), and the work implement (19), respectively, Each hydraulic hose is connected to each of the hydraulic cylinders (20, 21, 22) from a plurality of control switching valves (63, 64, 65, 66) provided therein via the swing bracket (16). In the hydraulic piping structure of the swing type working machine device,
The swing bracket (16) is for laying a hydraulic hose (40) for the boom cylinder (20) from the internal space (38) of the swing bracket (16) to the external space of the boom cylinder mounting portion (32). For laying hydraulic hoses (43, 44) for the arm cylinder (21) and the work implement cylinder (22) in the first piping arrangement passage (42) and the outer space of the boom mounting portion (33). A hydraulic piping structure for a left-right swing type working machine device, comprising: a second piping arrangement passage (48). The hydraulic piping structure of the left-right swing type working machine device according to claim 1,
The hydraulic hose (40) for the boom cylinder laid from the inside of the upper revolving structure via the internal space (38) of the swing bracket (16) and the first piping arrangement passage (42) is connected to the boom cylinder (20). A first fixing clamp (49) is provided near a pin (39) for connecting the swing bracket (16) to the internal space (38) of the swing bracket (16) and the second pipe arrangement passage ( 48), the hydraulic hoses (43, 44) for the arm cylinder (21) and the work implement cylinder (22), etc., laid through the shaft (17a) connecting the boom (17) and the swing bracket (16). Characterized in that it is fixed in the vicinity by a second fixed clamp (50) and connected to the respective hydraulic cylinders (20, 21, 22). Hydraulic piping structure of the work machine apparatus. A pipe fixing clamp member (67) for binding and fixing the hydraulic hoses (40, 43, 44) from the plurality of control switching valves (63, 64, 65) to a pipe space (62) inside the upper rotating body. And the hydraulic hoses (40, 43, 44) fixed by the pipe fixing clamp member (67) restrict the lateral movement of the hoses and guide the longitudinal movement of the hoses, and 3. The hydraulic piping structure of a left-right swing type working machine according to claim 2, further comprising a piping guide member (68) that passes into the internal space (38) of the bracket (16). The pipe fixing clamp member (67) is installed on an aerial mount (69) provided at an aerial position in a pipe space (62) inside the upper revolving unit, and connects a hose between the pipe guide member (68) and the hose. The hydraulic piping structure for a left-right swing type working machine according to claim 3, wherein the piping space (62) is fixed so as to be separated from an upper surface and a lower surface of the piping space (62). The piping guide member (68) has upper and lower two insertion portions (70, 71) through which hydraulic hoses are inserted in one horizontal row, respectively, and the piping fixing clamp member (67) clamps the hydraulic hoses in two vertical rows. 5. The left and right as claimed in claim 4, further comprising a binding clamp (73), and laid so that hoses between the pipe guide member (68) and the pipe fixing clamp member (67) do not overlap. Hydraulic piping structure of swing type work equipment. Of the hydraulic hoses (40, 43, 44), only the boom cylinder hydraulic hose (40) is placed in the lowest row of the two vertical rows of the binding clamp (73) of the pipe fixing clamp member (67). While being clamped, it was inserted through the lower insertion portion (71) of the pipe guide member (68) and laid separately from the hydraulic hoses (43, 44) for the arm cylinder (21) and the working tool cylinder (22). The hydraulic piping structure of a left-right swing type working machine according to claim 5, characterized in that: The said pipe fixing clamp member (67) was attached rotatably centering | focusing on a substantially up-down direction axis (75) according to the bending displacement of the said hydraulic hose (40,43,44). The hydraulic piping structure of the left-right swing type working machine device according to any one of 3 to 6.

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