JP2004137676A - Greasing pipe fitting structure and construction machine having it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To attach a greasing hose to save a fitting space to a working front. <P>SOLUTION: A pipe 27 is disposed along the upper surface of a boom 11, and the pipe 27 is held by a base plate 42, a support member 41 and a presser plate 43 to be fixed. A block 40 is provided on the presser plate 43, and the block 40 is fixed to the presser plate 43 with a bolt 44 and a nut 45 for fixing the pipe. The greasing hose 35 is disposed parallel to the pipe 27, and the end of the hose is connected to the block 40. Thus, a seat is not provided separately for fixing the greasing hose on the boom 11 to save the space. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a grease supply pipe mounting structure for guiding lubricating oil to a front rotating shaft such as a boom or an arm, and a construction machine having the same.
[0002]
[Prior art]
Conventionally, a construction machine such as a hydraulic shovel has a boom, an arm, and a plurality of cylinders for driving the boom and the arm, each of which is rotatable. Lubricating oil such as grease is supplied to these front rotating shafts (bearing portions) via grease supply pipes provided along the boom and the arm, thereby preventing the bearing portion from running out of oil film. . In such construction machines, there is known one using a flexible hose as a greasing pipe (for example, see Patent Document 1). According to this, a block is fixed on the surface of a boom, and a greasing hose is fixed to this block.
[0003]
[Patent Document 1]
JP 2000-204587 A
[Problems to be solved by the invention]
By the way, a hydraulic pipe for supplying a driving pressure to the cylinder is clamped to the boom and the arm. Therefore, when a block for fixing the greasing hose is mounted on the surface of the boom or arm as described in the above publication, a large number of mountings are required to prevent the block for fixing the greasing hose and the clamp for fixing the pipe from interfering with each other. Space is required. In particular, since the multi-joint front has a large number of bearings, the number of greasing hoses increases, and the mounting space for greasing hoses further increases.
[0005]
SUMMARY OF THE INVENTION An object of the present invention is to provide a greasing pipe mounting structure capable of saving a space for mounting a greasing pipe and simplifying a front surface shape, and a construction machine including the same.
[0006]
[Means for Solving the Problems]
The present invention is applied to a greasing pipe mounting structure in which a multi-joint front rotatably provided on a vehicle body is driven by a hydraulic cylinder to supply grease to the multi-joint front and a rotating portion of the hydraulic cylinder. . Then, a greasing pipe for lubricating the multi-joint front and the rotating portion of the hydraulic cylinder, a cylinder driving pipe for supplying the cylinder driving pressure to the hydraulic cylinder, and a cylinder driving pipe are fixed along the multi-joint front. The object described above is achieved by providing a cylinder driving pipe fixing member and a greasing pipe fixing member attached to the cylinder driving pipe fixing member to fix the greasing pipe.
Further, the above-described object is achieved by providing the above-described greasing pipe structure in a construction machine.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS.
FIG. 1 is a side view showing a dismantling work machine having a greasing pipe mounting structure according to the present invention and capable of working at high places. This dismantling work machine uses a hydraulic excavator as a base machine, and a revolving unit 2 is mounted on a traveling unit 1 so as to be revolvable. A multi-joint work front attachment 10 (hereinafter, front) is rotatably supported on the revolving unit 2.
[0008]
The front 10 includes a boom 11 rotatably connected to the revolving unit 2, a first arm 12 rotatably connected to the tip of the boom 11, and a second arm rotatably connected to the tip of the first arm 12. It has an arm 13, a third arm 14 rotatably connected to the tip of the second arm 13, and a crusher 15 supported on the tip of the third arm 14. As shown in the drawing, the boom 11 is extended by a structure of adding a plurality of pieces, and a plurality of arms 12 to 14 are attached to the end of the boom, so that the work range (work height) can be increased. The boom 11 and the arms 12 to 14 have a hollow shape.
[0009]
The boom 11 is rotated by expansion and contraction of a pair of boom cylinders 16, the first arm 12 is rotated by expansion and contraction of a first arm cylinder 17, the second arm 13 is rotated by expansion and contraction of a second arm cylinder 18, and the third arm 14 is The crusher 15 is rotated by the expansion and contraction of the tilt cylinder 20 by the expansion and contraction of the arm cylinder 19. The claw 15a at the tip of the crusher is opened and closed by an actuator (not shown). This will demolish high-rise buildings, buildings and factories. It should be noted that the front 10 can be replaced with various things, and different operations can be performed by replacing the front 10.
[0010]
Lubricating oil such as grease is supplied to each rotating shaft (bearing portion 21) of the boom 11, the arms 12 to 14, and the cylinders 16 to 20 via a greasing pipe provided along the boom 11, the arms 12 to 14. Greasy. This prevents the oil film from running out of the bearing portion 21 and realizes a smooth turning operation of the boom 11, the arms 12 to 14, and the cylinders 16 to 20. In the present embodiment, a flexible hose having excellent handleability and exchangeability is used as the greasing pipe. Hereinafter, the mounting structure of the greasing pipe will be described.
[0011]
FIG. 2 is an enlarged view of a base end portion of the boom, FIG. 3 is an III view (top view) of FIG. 2, and FIG. 4 is an enlarged view of an IV section of FIG. 3. As shown in FIGS. 2 to 4, a block 25 is fixed on the upper surface of the base end of the boom, and one end of a greasing hose 31 to 35 is connected to the block 25. The other ends of the greasing hoses 31 and 32 are connected to the bearing 21 at the base end of the boom, and the other ends of the greasing hoses 33 and 34 are connected to the bearing 21 of the boom cylinder 16. The remaining greasing hoses 35 (five in the figure) are connected to the arms 12 to 14 and the bearings 21 of the cylinders 17 to 20 via a block 40 described later. Although five greasing hoses 35 are shown in the figure, the number of the greasing hoses 35 is actually equal to the number of greasing points, and all illustrations are omitted.
[0012]
As shown in FIG. 4, the block 25 is provided with nipples 26 corresponding to the respective greasing hoses 31 to 35. When lubricating the bearing 21, lubricating oil is injected into the greasing hoses 31 to 35 from the corresponding nipple 26 using a grease gun or the like. Note that pressure oil from a lubricating oil hydraulic pump (not shown) mounted on the revolving unit 2 may be led to the block 25 via a pipe to supply grease to the bearing unit 21.
[0013]
As shown in FIG. 3, a plurality of pipes 27 for guiding the driving pressure oil from the revolving unit 2 side to the cylinders 17 to 20 extend on the upper surface of the boom 11 along the longitudinal direction of the boom 11. These pipes 27 are arranged at equal intervals over substantially the entire width direction of the boom 11, and the greasing hose 35 is arranged substantially parallel to the pipe 27. 5 is an enlarged view of a portion V in FIG. 3 showing a central portion in the width direction of the boom 11, FIG. 6 is a view taken along a line VI in FIG. 5, and FIG. 7 is a view taken along a line VII in FIG.
[0014]
As shown in FIGS. 6 and 7, a base plate 42 having a substantially U-shaped cross section is welded to the boom 11. The pipe 27 is sandwiched between the base plate 42 and the holding plate 43 by a pair via a pair of upper and lower support members 41 having a concave portion 41a corresponding to the outer peripheral shape. The support member 41 serves as a cushion for preventing a load from acting on a bolt 44 described later due to bending of the boom 11 and the like, and is formed of a rubber material or the like.
[0015]
On the holding plate 43, the block 40 is fixed over the pair of holding plates 43. The block 40 is provided with through holes of the same number (five in the figure) as the number of the greasing hoses 35 in parallel with the pipe 27. The joint 35a of the greasing hose 35 is attached to each through hole, and the end of the greasing hose 35 is connected to the block 40 via the joint 35a. In the figure, in order to prevent interference between the hoses, the greasing hoses 35 are arranged in two upper and lower stages, and the upper and lower hose mounting positions are shifted.
[0016]
The base plate 42, the support member 41, the pressing plate 43, and the block 40, which are vertically stacked, are respectively provided with through holes in the vertical direction. Bolts 44 pass through these through holes, and the bolts 44 are screwed to nuts 45 on the back side of the base plate 42. Thereby, the pipe 27 is clamped and fixed to the boom 11, and the block 40 is fixed to the holding plate 43.
[0017]
As shown in FIG. 2, the blocks 40 are provided at a predetermined distance in the longitudinal direction of the boom 11, and the ends of the greasing hoses 35 are connected to the respective blocks 40. Thereby, the positions of both ends of the greasing hose 35 are fixed. As shown in FIG. 8, a cylindrical cover 46 that covers the greasing hose 35 from outside is provided between the blocks 40 (the VIII portion in FIG. 3). The greasing hoses 35 are bundled into several units (two and three in the figure) by the cover 46 and are arranged in the cover 46 with a gap. The cover 46 is fixed to the holding plate 43 by a bolt 44 via a hose clip 47. As shown in FIG. 3, the greasing hose 35 is covered with a cover 46 even between the block 25 and the block 40.
[0018]
When fixing the greasing hose 35, the pipe 27 is first fixed to the boom 11 with the bolts 44 and the nuts 45, and the block 40 is fixed to the holding plate 43. Next, the greasing hose 35 is moved along the boom 11 to connect the hose end to the block 40. Thereby, the greasing hose 35 does not become an obstacle, and the pipe 27 can be easily fixed.
[0019]
In the above, the attachment structure of the greasing hose 35 to the boom 11 has been described, but the attachment structure to the arms 12 to 14 is also the same. That is, the pipe 27 for supplying the cylinder drive pressure is clamped and fixed to the upper surfaces of the arms 12 to 14, the block 40 is attached to this clamp, and the end of the greasing hose 35 is connected. In this case, the number of the greasing hoses 35 decreases toward the ends of the arms 12 to 14, so that the block 40 may be reduced in size according to the number of the greasing hoses 35.
[0020]
According to the greasing pipe mounting structure of the construction machine of the above embodiment, the following operation and effect can be obtained.
(1) A block 40 is mounted on a holding plate 43 for piping clamp provided on the boom 11 and the arms 12 to 14, and an end of the greasing hose 35 is connected to the block 40 to fix the greasing hose 35. I made it. Therefore, there is no need to directly attach the greasing pipe fixing block to the boom 11, and the space for attaching the block can be saved. This eliminates the need to provide a seat or the like for fixing the block to the boom 11, so that the boom 11 can be configured at low cost without complicating the surface shape.
(2) Since the block 40 is mounted by the pipe clamp bolts 44, the pipe clamp and the block 40 are fastened together, so that the number of parts can be reduced. Assembly man-hours can be saved.
(3) Since the pipe 27 and the greasing hose 35 are integrated and arranged on the upper surfaces of the boom 11 and the arms 12 to 14, the arrangement of the pipe 27 and the greasing hose 35 is hardly seen from the outside, and the appearance is good.
(4) Since the flexible hose 35 is used as the greasing pipe, the handleability is better than the pipe, and the acquisition and replacement are easy. Further, even when an obstacle collides with the greasing hose 35, damage is less than that of a pipe.
(5) The blocks 40 are provided at predetermined intervals along the longitudinal direction of the boom 11 and the arms 12 to 14, and the ends of the hoses are connected to the blocks 40. Therefore, it is not necessary to use a long hose, and the hose can be replaced. Easy.
(6) Since the greasing hoses 35 are bundled and covered with the cover 46 except at the end of the hose and fixed to the holding plate 43 via the hose clip 47, the deformation of the greasing hose 35 can be absorbed.
[0021]
In the above embodiment, the block 40 and the pressing plate 43 are separate bodies, but they may be integrated. As shown in FIG. 9, a block 50 is formed by integrating the block 40, the holding plate 43, and the support member 41, and the end of the greasing hose 35 is connected to the block 50. May be clamped. Thereby, the number of parts can be saved. As shown in FIG. 9, one of the upper and lower support members (the lower side in the figure) may not be provided.
[0022]
As shown in FIG. 3, the pipe 27 is also clamped at a position other than the center in the width direction of the boom 11, and the block 40 may be attached to a clamp position other than the center and the greasing hose 35 may be connected. Although the disassembly working machine has been described as an example, the present invention can be similarly applied to another working machine having an articulated front.
[0023]
Although the supporting member 41, the base plate 42, the holding plate 43, the bolts 44, and the nuts 45 constitute a cylinder driving pipe fixing member, the shapes thereof are not limited to the embodiments and can be appropriately changed. Although the greasing pipe fixing member is configured by the block 40, the shape of the block 40 is not limited to the embodiment and can be appropriately changed. Although the fastening member is configured by the bolt 44 and the nut 45, a screw hole may be provided in the base plate 42. Although the greasing pipe is constituted by the flexible hose 35, it may be constituted by a hose other than the hose (for example, a pipe).
[0024]
【The invention's effect】
As described above in detail, according to the present invention, a greasing pipe fixing member for fixing a greasing pipe is attached to a cylinder driving pipe fixing member for fixing a cylinder driving pipe along the multi-joint front. Therefore, there is no need to attach the greasing pipe fixing member to the front of the multi-joint, and the space for mounting the greasing pipe fixing member can be saved. Thus, it is not necessary to provide a seat for fixing the greasing pipe on the surface of the multi-joint front, so that the surface shape of the front can be simplified.
[Brief description of the drawings]
FIG. 1 is a side view of a dismantling work machine to which the present invention is applied.
FIG. 2 is an enlarged view of a base end of a boom of the work machine of FIG. 1;
FIG. 3 is a view taken in the direction of arrows in FIG. 2;
FIG. 4 is an enlarged view of a part IV in FIG. 3;
FIG. 5 is an enlarged view of a portion V in FIG. 3;
FIG. 6 is a view taken in the direction of arrow VI in FIG. 5;
7 is a VII view of FIG. 5;
FIG. 8 is a sectional view of a portion VIII in FIG. 3;
FIG. 9 is a diagram showing a modification of the present invention.
[Explanation of symbols]
2 Revolving body 10 Work front attachment 16-20 Work hydraulic cylinder 27 Pipe 35 Greasing hose 40 Block 41 Support member 42 Base plate 43 Press plate 44 Bolt 45 Nut

Claims (6)

A multi-joint front rotatably provided on the vehicle body is driven by a hydraulic cylinder, and in a greasing pipe mounting structure for supplying lubrication to a rotating portion of the multi-joint front and the hydraulic cylinder,
A greasing pipe for greasing the rotating part of the articulated front and the hydraulic cylinder,
A cylinder driving pipe for supplying a cylinder driving pressure to the hydraulic cylinder,
A cylinder driving pipe fixing member for fixing the cylinder driving pipe along the multi-joint front,
A greasing pipe fixing member attached to the cylinder driving pipe fixing member and fixing the greasing pipe. The greasing pipe mounting structure according to claim 1,
The cylinder driving pipe fixing member fixes the cylinder driving pipe by a fastening member, and the fastening member fixes the greasing pipe fixing member to the cylinder driving pipe fixing member. Construction. The greasing pipe mounting structure according to claim 1,
A resin pipe mounting structure, wherein the cylinder driving pipe fixing member and the greasing pipe fixing member are integrally formed. The greasing pipe mounting structure according to any one of claims 1 to 3,
The greasing pipe mounting structure, wherein the greasing pipe is formed of a flexible hose, and the greasing pipe fixing member is formed of a block that relays the flexible hose. The greasing pipe mounting structure according to any one of claims 1 to 4,
The cylinder driving pipe fixing member is configured to fix a plurality of hydraulic cylinder driving pipes used for the multi-joint front as a group, and the greasing pipe fixing member is configured to rotate each of the multi-joint front and the hydraulic cylinder. A greasing pipe mounting structure characterized in that the greasing pipes for supplying grease to the respective parts are fixed as a group. A construction machine comprising: a greasing pipe mounting structure according to any one of claims 1 to 5, provided on a multi-joint front rotatably provided on a vehicle body.

Images