JP2004339897A - Hydraulic piping guide of digging vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hydraulic piping guide having excellent maintenance in arrangement adjustment or the like of hydraulic piping by having excellent assembling, and easily performing hydraulic piping assembling working. <P>SOLUTION: The hydraulic piping guide of a digging vehicle constitutes a first piping guide member 61 of a parallel part 61b in parallel to a hydraulic piping installed face 63 and intersected vertically in the direction of extension of the hydraulic piping 48, and a support part provided on one end of the parallel part 61b and erected from the hydraulic piping installed face 63. The hydraulic piping guide opens the other end side of the parallel part 61b to be made a hydraulic piping storing opening 61c, and is detachably provided with a second piping guide member 62 on the hydraulic piping installed face 63 in the vicinity of the hydraulic piping storing opening 61c of the first piping guide member 61. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an excavating work vehicle provided with a rotatable working machine at a front portion of a machine body, and particularly to a fixing structure of a hydraulic pipe connected to a hydraulic actuator such as a hydraulic cylinder that rotates the working machine.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a rotatable working machine is provided at a front portion of an excavating work vehicle, and the working machine is equipped with a hydraulic actuator such as a hydraulic cylinder. A hydraulic pipe is connected to the hydraulic actuator, and the hydraulic oil is supplied and discharged from the main hydraulic valve by the hydraulic pipe.
Since such a hydraulic pipe is disposed between mutually movable members such as a boom and an arm which are configured to be vertically rotatable, for example, the hydraulic pipe itself is rotated with the rotation of the boom and the arm and the like. Bends and distortions. Therefore, conventionally, a hydraulic piping guide for fixing the position of the hydraulic piping is provided at a position where bending is likely to occur, so as to prevent bending of the hydraulic piping and prevent interference with the outside due to bending of the hydraulic piping. Was what I was doing.
[0003]
FIG. 7 is a side view showing the configuration of a conventional hydraulic piping guide.
For example, as shown in FIG. 7A, the conventional hydraulic pipe guide 50 is provided in a substantially inverted U-shape in a direction perpendicular to the hydraulic pipe installation surface 51, and The stays 54 are projected from both feet of the hydraulic piping guide 50 to the side, as shown in FIG. 7 (b). The stays 54, 54 are fixed to the hydraulic piping installation surface 51 through fixing members such as bolts 56, and are configured to be detachably assembled.
Then, the hydraulic pipes 53 are passed through the inside of the hydraulic pipe guide 50 fixed in the form of a gate to the hydraulic pipe installation surface by such an assembling method or welding, so that the hydraulic pipes are fixed and loosened. And to prevent distortion.
[0004]
Incidentally, in such a hydraulic piping guide, a configuration in which rollers are arranged so as to sandwich the hydraulic piping to constitute a hydraulic piping guide for fixing the hydraulic piping is disclosed in a conventional gazette. The movement of the hydraulic pipe can be efficiently released while maintaining the fixing action as the pipe fixing guide. (See Patent Document 1)
Also known is a hydraulic pipe which is slidable by a hydraulic pipe guide in the vicinity of the swing section so as to eliminate a change in the form of the hydraulic pipe in the swing section which is easily damaged and prevent damage to the hydraulic pipe. It has become a technology. (See Patent Document 2)
[0005]
[Patent Document 1]
JP-A-8-199614 [Patent Document 2]
JP 2000-129718 A
[Problems to be solved by the invention]
However, in the above-described conventional pipe structure, for example, in a case where the hydraulic pipe guide 50 is closed by welding or the like with respect to the hydraulic pipe installation surface 51 as shown in FIG. When assembling the pipe 53, it is necessary to pass the inside of the hydraulic pipe guide 50 over a long distance, so that the work of assembling the hydraulic pipe 53 is difficult. Then, after passing the hydraulic piping 53 through the inside of the hydraulic piping guide 50, it is necessary to adjust the arrangement of the hydraulic piping 53, which is a time-consuming operation.
In the case where the hydraulic piping guide 50 is detachably assembled as shown in FIG. 7B, stays are provided on both feet to fix the hydraulic piping guide 50 to the hydraulic piping installation surface 51. 54 and 54 need to be provided, and since the stays 54 and 54 for fixing the hydraulic pipe guide are provided, the entire width of the hydraulic pipe guide is widened. I couldn't do that.
Further, if the hydraulic pipe guide has an edge, the pipe may be damaged at a contact surface with the hydraulic pipe guide.
[0007]
In view of the above problems, the present invention provides a hydraulic pipe guide that has good assemblability and can easily perform a hydraulic pipe assembling operation, and has good maintainability in adjusting and aligning the hydraulic pipes. is there. Further, the hydraulic pipe is not damaged by contact with the hydraulic pipe guide.
[0008]
[Means for Solving the Problems]
The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.
[0009]
That is, in the first aspect, a parallel portion parallel to the hydraulic pipe installation surface and perpendicular to the hydraulic pipe extension direction, and provided at one end of the parallel portion to stand upright from the hydraulic pipe installation surface. A first pipe guide member from the supporting portion to be opened, and the other end of the parallel portion is opened to form a hydraulic pipe storage port, and a hydraulic pipe is disposed near the hydraulic pipe storage port of the first pipe guide member. A second piping guide member is provided on the surface so as to be detachable.
[0010]
According to a second aspect of the present invention, the support portion is arranged to be inclined at a predetermined angle in the hydraulic pipe extension direction.
[0011]
In a third aspect, the cross-sectional shape of the first pipe guide member and the second pipe guide member is circular or a rounded corner.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of the invention will be described.
FIG. 1 is a side view showing an entire configuration of an excavating work vehicle according to the present invention, FIG. 2 is a side view of a working machine showing a configuration of a hydraulic pipe, and FIG. 3 is a rear view of the same working machine.
[0013]
First, the overall configuration of an excavator equipped with a pipe guide according to the present invention will be described.
As shown in FIG. 1, the excavating work vehicle 1 has a swivel table bearing 3 disposed at the upper center of a crawler type traveling device 2, and the swivel table bearing 3 supports the swivel table 4 so that the swivel table 4 can be turned left and right. At the front and rear end portions of the crawler type traveling device 2, the earth discharging plate 5 is disposed so as to be vertically rotatable.
[0014]
Above the swivel 4, a bonnet 6 for covering an engine, a fuel tank, and the like (not shown) and a driver's seat 7 are provided. A canopy 8 is provided upright at the rear of the driver's seat 7. A lower end of the working machine 10 is pivotally supported on the side of the canopy 8 on the revolving base 4 so as to be vertically rotatable. Around the driver's seat 7, a lever, a foot pedal, and the like for operating the work machine 10, the crawler-type traveling device 2, and the like are provided.
[0015]
The crawler-type traveling device 2 has a drive sprocket 41 disposed on one of the front and rear sides, a driven sprocket 42 disposed on the other side, and a crawler belt 43 wound between the drive sprocket 41 and the driven sprocket 42. The drive sprocket 41 is driven by a hydraulic motor 44. Further, a turning motor is arranged between the turning table 4 and the turning table bearing 3, and the turning table 4 can be turned by the turning motor.
[0016]
Next, the configuration of the working machine 10 will be described with reference to FIGS.
As shown in FIGS. 1 and 2, the working machine 10 includes attachment devices such as a boom 13, an arm 12, and a bucket 11, and a group of hydraulic cylinders and a hydraulic piping system for driving these devices. The boom 13 has a structure in which the first boom 17, the second boom 18, and the third boom 19 are pivotally supported by respective pivot points.
[0017]
Attachment equipment such as the bucket 11 is pivotally supported by the distal end of the arm 12 at the pivot 11a so as to be able to rotate back and forth. A bucket cylinder 16 is interposed between a bottom-side support point 16a provided on an arm bracket 14 protruding above the base side of the arm 12 and a rod-side support point 16b provided on a link mechanism 15 of the bucket 11. Is equipped. The bucket 11 is rotated by the expansion and contraction of the bucket cylinder 16.
[0018]
The base side of the arm 12 is pivotally supported by a tip of the third boom 19 at a pivot point 12a so as to be vertically pivotable. An arm cylinder 20 is interposed between a rod-side support point 20 b provided on the arm bracket 14 and a bottom-side support point 20 a provided on the third boom 19. The arm 12 can be rotated by the expansion and contraction of the arm cylinder 20.
[0019]
The base side of the third boom 19 is pivotally supported by the tip of the second boom 18 at a pivot 19a so as to be able to turn left and right. The base side of the second boom 18 is pivotally supported at the tip of the first boom 17 at a pivot point 18a so as to be able to turn left and right. On the left side surface of the third boom 19, a link bracket 37 for rotatably supporting an upper end portion 22a of the parallel link 22, which will be described later, is fixed.
[0020]
A bracket 52 is fixedly provided on the left side surface of the second boom 18 near the distal end, and a rod-side support point 21b provided on the bracket 52 and a bracket 38 protruding from the left side surface on the base side of the first boom 17 are provided. , An offset cylinder 21 is interposed between the bottom side support point 21a and the bottom side support point 21a. The second boom 18 is rotated left and right by the expansion and contraction of the offset cylinder 21.
[0021]
A parallel link 22 is interposed between the first boom 17 and the third boom 19 so as to be rotatable left and right. An upper end 22a of the parallel link 22 is pivotally supported by the link bracket 37 and a lower end 22b. Is pivotally supported near the tip of a bracket 36 projecting from the left side surface of the first boom 17.
With such a configuration, when the second boom 18 is rotated left and right, the parallel link 22 is also rotated left and right in conjunction with each other, and is located on the distal end side of the third boom 19 (more specifically, the third boom 19, The arm 12 and the bucket 11) swing (offset) right and left without the upper surface thereof being inclined left and right.
[0022]
The base side of the first boom 17 is pivotally supported by the boom bracket 9 at a pivot point 17a so as to be vertically pivotable. A boom cylinder 23 is interposed between a rod-side support point 23 b provided on the front surface of the first boom 17 near the distal end and a bottom-side support point 23 a provided on the boom bracket 9. The first boom 17 is rotated by the expansion and contraction of the boom cylinder 23.
At this time, the boom cylinder 23 is disposed on the front side of the first boom 17, and a protective cover 24 is provided on the front side of the rod so that the rod of the boom cylinder 23 does not interfere with an obstacle at the time of guttering work. ing.
[0023]
Next, a hydraulic piping system for operating the work machine 10 described above will be described.
In the present embodiment, the hydraulic cylinder group that operates the work machine 10 includes a total of four bucket cylinders 16, arm cylinders 20, offset cylinders 21, and boom cylinders 23. A total of eight hydraulic pipes are provided for each two pipes. Pipes 31 and 32 for the boom cylinder 23 extend from a main hydraulic valve (not shown), penetrate the boom bracket 9 from the rear to the front, and are connected to both ends of the cylinder part of the boom cylinder 23.
[0024]
On the other hand, hydraulic pipe groups of the pipes 25 and 26 for the bucket cylinder 16, the pipes 27 and 28 for the arm cylinder 20, and the pipes 29 and 30 for the offset cylinder 21 extend from a main hydraulic valve (not shown). , Which are provided on the rear surface of the first boom 17 and are guided inside a pipe cover 33 having openings 33a and 33b at upper and lower sides.
The six hydraulic piping groups are provided on the rear surface of the second boom 18 and are guided inside a piping cover 34 having openings 34a and 34b on the upper and lower sides and an opening 34c on the left side. At this time, the pipes 29 and 30 for the offset cylinder 21 are drawn out of the pipe cover 34 through the opening 34c and connected to both ends of the cylinder part of the offset cylinder 21.
[0025]
Next, a total of four hydraulic piping groups including the piping 25 and 26 for the bucket cylinder 16 and the piping 27 and 28 for the arm cylinder 20 are connected to the lower opening of the piping cover 35 provided on the rear surface of the third boom 19. It is guided into the inside of the pipe cover 35 from 35a. The pipe cover 35 has a trapezoidal shape in a side view and a U-shape in a plan view, and is configured to cover the rear part of the third boom 19 and is detachably fixed by bolts or the like. The rear surface of the third boom 19 is open, and the four hydraulic piping groups are supported by brackets (not shown) that are erected from the lower surface of the third boom 19 from the rear surface of the third boom 19.
[0026]
A pipe passage is provided between the bracket and the right side surface of the third boom 19, and the pipes 25, 26, 27, and 28 are passed through the pipe passage. The pipes 27 and 28 for the arm cylinder 20 are respectively connected to both ends of the cylinder portion of the arm cylinder 20. On the other hand, the pipes 25 and 26 for the bucket cylinder 16 are guided to the tip of the third boom 19 along the gap between the arm cylinder 20 and the upper surface of the third boom 19, and are connected to both ends of the cylinder portion of the bucket cylinder 16.
[0027]
Next, the structure of the piping guide according to the present invention will be described.
4A and 4B are front views showing an assembly structure of a pipe guide, wherein FIG. 4A is a view showing a state before assembling, and FIG. 4B is a view showing a state after assembling.
5A and 5B are diagrams showing the configuration of the piping guide, where FIG. 5A is a plan view and FIG. 5B is a side view.
The hydraulic piping guide 45 is provided to fix the hydraulic piping, and is disposed near the rotation fulcrum 17a on the base side of the first boom 17 to prevent the hydraulic piping from being loosened or bent due to the rotation of the movable member. Things. The hydraulic piping guide 45 is provided not only in the vicinity of the rotation fulcrum 17a on the base side of the first boom 17 but also in a portion where the movement of the hydraulic piping accompanying the rotation of the movable member is large (for example, the first boom 17 and the second boom 18). , The third boom 19, the connecting portion of the arm 12, etc.).
[0028]
As shown in FIGS. 4 and 5, the pipe guide 45 is formed into a first pipe guide member 61 formed in an L-shape in a front view, and formed into a hollow cylindrical shape so that a fixing member such as a bolt can be inserted therein. And the second piping guide member 62 configured.
[0029]
The first piping guide member 61 is formed of a cylindrical rod, and is bent at an intermediate portion to form an L-shape. The first pipe guide member 61 includes a support portion 61a disposed vertically to the hydraulic pipe installation surface 63 and a parallel portion 61b parallel to the hydraulic pipe installation surface 63. . The end of the first piping guide member 61 on the support portion 61a side is provided integrally with the hydraulic piping installation surface 63, and the parallel portion 61b side is parallel to the hydraulic piping installation surface 63, and An opening 61c is formed at the end of 61b. The height of the support portion 61a is made larger than the diameter of the hydraulic pipe, and the opening 61c is used as a hydraulic pipe storage port so that the hydraulic pipe can be inserted and stored from the side. The first pipe guide member 61 may be fixed to the hydraulic pipe installation surface 63 by welding or the like.
Further, the first pipe guide member 61 is arranged so that the parallel portion 61b is perpendicular to the extension direction of the hydraulic pipe 48.
[0030]
The second pipe guide member 62 is formed in a hollow cylindrical shape, and a fixing member such as a bolt 65 is inserted into the second pipe guide member 62. The axial length of the screw portion 65a of the bolt 65 is longer than the axial length of the second pipe guide member 62. When the bolt 65 is inserted through the second pipe guide member 62, the screw portion 65a Project from the lower end of the second piping guide member 62. The screw portion 65 a protruding from the lower end of the second pipe guide member 62 is screwed into a screw seat 67 fixed on the hydraulic pipe installation surface 63. The combined height of the screw seat 67 and the second piping guide member 62 is substantially the same as the height of the support portion 61a.
[0031]
In FIG. 5, the screw seat 67 is disposed near the end of the first pipe guide member 61 on the side of the opening 61c, and is located in a close position where the tip of the first pipe guide member 61 and the screw seat 67 do not overlap in plan view. ing. In the present embodiment, the screw seat 67 is disposed below the parallel portion 61b side end, or slightly shifted to one of the left and right sides. The shortest distance between the upper end of the screw seat 67 and the tip of the first piping guide member 61 is arranged to be larger than the diameter of the hydraulic piping. The screw seat 67 has a screw thread formed therein so that the bolt 65 can be screwed and fixed. Then, the second pipe guide member 62 in which the bolt 65 is inserted is screwed into the screw seat 67 from the vertical direction, thereby closing the opening 61c formed by the parallel portion 61b of the first pipe guide member 61. You can. However, the shortest distance between the distal end of the first piping guide member 61 and the second piping guide member 62 may be configured to be smaller than the diameter of the hydraulic piping so as not to come off. Further, the bolt 65 and the second pipe guide member 62 may be integrally formed, and the bolt 65 may be formed to have a screw portion only at the screw seat 67.
[0032]
The first pipe guide member 61 is formed in a circular cross section so that the hydraulic pipe 48 is not damaged when the first pipe guide member 61 comes into contact with the hydraulic pipe 48 fixed to the pipe guide 45. Similarly, since the outer periphery of the second piping guide member 62 is also formed in a cylindrical shape, the hydraulic piping does not break even when it comes into contact with the hydraulic piping 48. In addition, the cross-sectional shape of the first piping guide member 61 is not limited to a circular shape, and may be a shape in which a corner is formed in an R shape.
[0033]
In the above configuration, when the hydraulic pipe 48 is mounted on the hydraulic pipe guide 45, the hydraulic pipe 48 is sandwiched from the opening 61c of the first pipe guide member 61 with the second pipe guide member 62 removed. When the hydraulic piping 48 is completely disposed below the parallel portion 61b, the second piping guide member 62 is fixed and the hydraulic piping 48 is confined in the space surrounded by the first piping guide member 61. That's how it works.
[0034]
Since the hydraulic piping guide 45 is configured as described above, it can be slid and inserted from the opening 61c of the first piping guide member 61 at the time of arranging the piping. It is not necessary to pass through the wire, and assemblability can be improved. Further, since the hydraulic piping can be removed from the hydraulic piping guide simply by removing the second piping guide member 62, the arrangement of the hydraulic piping can be easily adjusted and the maintainability can be improved. Further, even when the pressure oil flows through the inside of the hydraulic pipe, the hydraulic pipe can be taken out from the hydraulic pipe guide, so that the oil inside the pipe does not scatter around.
[0035]
In addition, it was necessary to provide mounting stays 54 in the conventional hydraulic piping guide 50 which was constructed in a conventional manner, but since the hydraulic piping guide 45 of the present invention has a structure having no stay, piping Even if the path is narrow, it is possible to dispose the assembled hydraulic piping guide, and it is possible to further reduce the cost.
[0036]
Next, the structure of a second embodiment of the hydraulic piping guide will be described.
FIGS. 6A and 6B are diagrams showing the configuration of the hydraulic piping guide 55 of the second embodiment, wherein FIG. 6A is a front view, FIG. 6B is a plan view, and FIG. 6C is a side view.
Also in this embodiment, similarly to the previous embodiment, a first pipe guide member 71 formed in an L-shape in a front view and a hollow cylindrical shape formed so that a fixing member such as a bolt 75 can be inserted therein. And a second pipe guide member 72 to be formed.
As shown in FIG. 6, in the hydraulic pipe guide 55 of the present embodiment, the first pipe guide member 71 is fixed to the hydraulic pipe installation surface 73, and the first pipe guide member 71 is It is composed of a parallel portion 71b parallel to the surface 73 and a support portion 71a inclined obliquely from the fixed portion 73a of the hydraulic piping arrangement surface 73.
[0037]
An opening 71c is formed at the end on the side of the parallel portion 71b, and the height between the parallel portion 71b and the hydraulic pipe installation surface 73 is larger than the diameter of the hydraulic pipe. The hydraulic piping 58 is accommodated below the parallel portion 71b from the opening 71c. The parallel portion 71b is disposed so as to vertically intersect the hydraulic pipe 58. In the vicinity of the end of the parallel portion 71b of the first pipe guide member 71, the tip of the first pipe guide member 71 and the screw seat 77 are arranged in a close position where they do not overlap in plan view. In the present embodiment, a screw seat 77 is fixed below the end of the parallel portion 71b and on the side of the pipe arrangement surface 73 and the fixed portion 73a of the first pipe guide member 71. By fixing the second pipe guide member 72 through which a fixing member such as the bolt 75 is inserted, the opening 71c of the first pipe guide member 71 can be closed.
Further, the support portion 71a is arranged at a predetermined angle in the extension direction of the hydraulic pipe 58.
With such a configuration, the hydraulic pipe 58 can be stored below the parallel portion 72b of the hydraulic pipe guide 55 when the second pipe guide member 72 is removed, and the second pipe guide member 72 can be stored when the hydraulic pipe 58 is stored. Is attached, the hydraulic pipe guide 55 can hold the hydraulic pipe 58.
[0038]
As described above, since the support portion 71a that supports the parallel portion 71b of the first piping guide member 71 is arranged at a predetermined angle in the extension direction of the hydraulic piping 58, the outer side surface of the hydraulic piping 58 located on the side and The contact area of the support portion 71a is increased, the protrusion to the side can be reduced, the hydraulic pipe can be held more reliably, and the hydraulic pipe is prevented from being twisted at the position where the hydraulic pipe guide is provided. can do.
[0039]
【The invention's effect】
The present invention is configured as described above, and has the following effects.
[0040]
That is, as described in claim 1, a parallel portion that is parallel to the hydraulic pipe installation surface and perpendicularly intersects the hydraulic pipe extension direction, and is provided at one end of the parallel portion and stands up from the hydraulic pipe installation surface. A first pipe guide member is formed from the supporting portion to be provided, and the other end of the parallel portion is opened to form a hydraulic pipe storage port, and a hydraulic pipe arrangement is provided near the hydraulic pipe storage port of the first pipe guide member. Since the second piping guide member is detachably provided on the installation surface,
At the time of assembling the pipe, it is not necessary to pass the hydraulic pipe inside the pipe guide over a long distance, so that the assemblability is improved. Further, even after the hydraulic piping is assembled, the hydraulic piping can be easily detached from the piping guide, so that the arrangement of the hydraulic piping can be easily adjusted and the maintainability can be improved. Further, even when the pressure oil is circulated in the hydraulic pipe, the hose can be removed from the hydraulic pipe guide, so that the hydraulic oil does not scatter around.
Further, since a stay is not provided in the hydraulic piping guide as in the related art, it is possible to arrange the hydraulic piping even when the passage width of the hydraulic piping is narrow, and it is possible to reduce costs.
[0041]
Since the supporting portion is arranged at a predetermined angle in the hydraulic pipe extension direction, the hydraulic pipe can be held more reliably, and the hydraulic pipe is twisted at the position where the hydraulic pipe guide is provided. Can be prevented.
[0042]
As described in claim 3, the cross-sectional shape of the first pipe guide member and the second pipe guide member is circular or rounded so that the hydraulic pipe guide and the hydraulic pipe are in contact with each other. Damage can be prevented.
[Brief description of the drawings]
FIG. 1 is a side view showing the entire configuration of an excavating work vehicle according to the present invention.
FIG. 2 is a side view of a working machine showing a configuration of a hydraulic pipe.
FIG. 3 is a rear view of the working machine.
FIG. 4 is a plan view showing an assembly structure of a hydraulic piping guide.
FIG. 5 is a diagram showing a configuration of a piping guide.
FIG. 6 is a diagram showing a configuration of a piping guide according to a second embodiment.
FIG. 7 is a side view showing a configuration of a conventional piping guide.
[Explanation of symbols]
45 Hydraulic piping guide 48 Hydraulic piping 61 First piping guide member 61a Support portion 61b Parallel portion 61c Hydraulic piping storage port 62 Second piping guide member 63 Hydraulic piping arrangement surface 65 Bolt 67 Screw seat

Claims (3)

A first pipe comprising: a parallel portion parallel to the hydraulic pipe mounting surface and perpendicular to the hydraulic pipe extending direction; and a support portion provided at one end of the parallel portion and standing upright from the hydraulic pipe mounting surface. A guide member is formed, and the other end side of the parallel portion is opened to be a hydraulic pipe storage port. A hydraulic piping guide for an excavator, comprising a piping guide member. The hydraulic pipe guide of an excavating work vehicle according to claim 1, wherein the support portion is disposed at a predetermined angle in a hydraulic pipe extension direction. The hydraulic pipe guide for an excavating work vehicle according to claim 1 or 2, wherein the first pipe guide member and the second pipe guide member have a circular or rounded corner.

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