KR20100014361A - Hydraulic piping arrangement structure for construction machine - Google Patents

Abstract

In the laying of hydraulic piping leading from a control valve to a hydraulic actuator of a front working machine, the space for laying the piping is reduced and a problem such as oil leakage from a connector joint section is eliminated. A hydraulic hose (22) for a front working machine, which hose leads from a control valve (20) to the front working machine, is laid so as to run from below the control valve (20), pass through an opening (15b) made in a supporting frame (15L), reach a space (S) formed between right and left supporting frames (15R, 15L), pass through a through-hole made in a coupling plate (17) covering the space (S), and then reach the front working machine. Further, a holding member (23) for supporting the hydraulic hose (22) is attached to the through-hole in the coupling plate (17).

Description

HYDRAULIC PIPING ARRANGEMENT STRUCTURE FOR CONSTRUCTION MACHINE}

The present invention belongs to the technical field of hydraulic piping arrangements in construction machinery such as hydraulic shovels.

In general, in construction machinery such as hydraulic shovels, the hydraulic oil of various hydraulic actuators installed in the front work machine is supported while supporting the base end of the front work machine so as to swing freely on the left and right support frames installed on the mount frame. Some control valves which perform dispatching control are disposed on the left and right outward directions of the left and right support frames. In this case, it is necessary to arrange the hydraulic piping connected to the hydraulic actuator from the control valve so as to follow the movement of the front work machine without interfering with or obstructing other member devices. Therefore, conventionally, the support member to which the control valve is assembled is provided with a pipe takeout plate for pulling the hydraulic pipe from the gas main body side to the front work machine side, and at the same time, the hydraulic pipe from the control valve to the pipe takeout plate is a steel pipe. On the other hand, it is known that the hydraulic pipe which extends from the pipe extraction plate to the front work machine side is constituted by a hydraulic hose (see Patent Document 1, for example).

Patent Document 1: Japanese Unexamined Patent Publication No. 2005-48495

[Problem to Solve Invention]

By the way, in the conventional one, the steel pipe on the control valve side and the hydraulic hose on the front work machine side are connected via a connector on the pipe take-out plate. In this case, the hydraulic hose moves in accordance with the operation of the front work machine. For this reason, it is easy to loosen a connector connection part gradually, and when a maintenance is neglected, an oil leak may arise from a connector connection part. In addition, since the pipe taking-out plate is arrange | positioned so that it may be located in the left-right direction of an outer side of a boom base end, it is necessary to secure the space for arranging the pipe taking-out plate in the said part, for example, like a super small swing type hydraulic shovel. In a construction machine of a small model, there is a desire to make the space for piping as compact as possible, and there is a problem to be solved by the present invention.

[Means for solving the problem]

The present invention was created in order to solve these problems in view of the above circumstances, and the invention of claim 1 is a front work machine provided with a hydraulic actuator on left and right support frames installed on a frame frame. In a construction machine comprising: supporting a base end with an axis so as to swing freely; and a control valve for controlling hydraulic oil supply / discharge control of the hydraulic actuator on the left and right outer sides of the support frame, the control valve being connected to the hydraulic actuator. The through hole provided in the plate-shaped member which extends the hydraulic piping used as the oil flow path between the left and right support frames through the opening formed in the support frame from the lower part of a control valve, and covers the said space part. Hydraulics arranged to penetrate the front And at the same time throw configuration, the through hole is opened in the plate-like member, a hydraulic pipe arrangement of the construction machine, characterized in that mounting the holding member for holding the hydraulic hoses.

According to the invention of claim 2, the holding member has a hose insertion tube and a hole through which the hydraulic hose is inserted, and a grommet fitted into the through hole of the plate-shaped member, and a grommet integrally formed in contact with the upper surface of the plate-shaped member. The hydraulic piping arrangement structure in the construction machine of Claim 1 comprised using the fixing plate which presses and fixes a flange part from the upper part of the said flange part.

[Effects of the Invention]

According to the invention of claim 1, the hydraulic hose which becomes the oil flow path from the control valve to the hydraulic actuator is arranged so as to reach the front work machine through a space portion formed between the left and right support frames from the lower side of the control valve. The space required for disposing the hydraulic hose can be made as compact as possible. In addition, the hydraulic hose penetrates the opening through hole in the plate-shaped member which covers the space part, and reaches the front work machine. However, the holding hole is equipped with a holding member for holding the hydraulic hose. Even if the hydraulic hose of the part leading to the front work machine follows the front work machine, the hydraulic hose of the part leading from the control valve to the holding member does not move, so that the hydraulic hose of the part leading from the control valve to the holding member is moved and other equipment is moved. Can be prevented from interfering with or loosening the connection with the control valve, and there is no risk of oil leakage from the connector connection, as it connects the intermediate part of the hydraulic piping from the control valve to the front work machine with the connector. This is excellent.

According to the invention of claim 2, the holding member can be easily attached to the through hole by pressing and fixing the flange portion of the grommet fitted to the through hole from the upper side with the fixing plate. In addition, because of the grommets, the through-holes become blocked, and it is possible to reliably prevent the earth and sand scattering during the work from entering the inside of the body from the through-holes of the plate-shaped member.

1 is a side view of a hydraulic shovel.

Fig. 2 is a side view showing an arrangement state of the hydraulic hose for the front work machine.

3 is a front view showing an arrangement state of the hydraulic hose for the front work machine.

It is a top view which shows the arrangement state of the hydraulic hose for front work machines.

Fig. 5 is a cross-sectional view taken along line X-X in Fig. 2, and Fig. 5B is a cross-sectional view taken along line X-X in Fig. 5A.

6 is a plan view of the grommets, (B) is a bottom view of the grommets, (C) is a front view of the grommets, and (D) is a right side view of the grommets.

(A) is a top view of a fixing plate, (B) is a left side view of a fixing plate, (C) is an X-X sectional view of FIG. 7 (A).

8 is a perspective view showing the mounting of the holding member to the connecting plate.

[Description of the code]

4: front work machine

15L: Support Frame

15R: Support Frame

15a: Boom bearing part

15b: opening

17: connecting plate

17a: through hole

20: control valve

22: Hydraulic hose for front work machine

23: holding member

24: grommets

24b: flange

24d: hose insertion hole and hole

25: fixing plate

EMBODIMENT OF THE INVENTION Next, embodiment of this invention is described based on drawing. In the drawing, reference numeral 1 denotes an ultra-swivel hydraulic shovel, and the hydraulic shovel 1 is a crawler-type lower traveling body 2 and an upper swinging body 3 which is supported to pivot freely on the lower traveling body 2. And the front work machine 4 mounted on the upper swing body 3, the front work machine 4 is configured such that the base end swings freely up and down the upper swing body 3 as described later. The first end of the first boom 5, the second end of the first boom 5, the second end of the first boom 5, and the second end of the second boom 6, The third boom 8 which is supported by the shaft so as to swing left and right freely and is connected to the first boom 5 with the link rod 7 interposed therebetween to move in parallel to the first boom 5 in left and right directions, An arm 9 supported by the shaft so that the base end freely swings back and forth at the distal end of the third boom 8, It is composed of a member such as a packet 10, which is installed to swing freely at the tip of the arm 9, and at the same time for swinging the boom cylinder 11 and the second boom 6 for moving the first boom up and down. Hydraulic actuators, such as the offset cylinder 12, the arm cylinder 13 for rocking back and forth the arm 9, and the packet cylinder 14 for rocking the packet 10, are provided.

On the other hand, 15L and 15R are left and right support frames installed on the mount frame 16 of the upper swing structure 3, and the left and right support frames 15L and 15R are the foundations of the first boom 5. The boom bearing portion 15a is formed to be supported by the shaft so that the end is free to swing. Moreover, these left and right support frames 15L and 15R comrades arrange | positioned in inclined shape so that the front is low and the back may become lower than the said boom bearing part 15a (corresponds to the plate-shaped member of this invention) ( 17), and the upper part of the space S formed between the left and right support frames 15L and 15R is covered by this connecting plate 17 by this. In the figure, 18L and 18R are left and right brackets supported by the shaft so that the base end of the boom cylinder 11 swings freely.

In addition, in the left and right outward directions of the left and right support frames 15L and 15R, a device storage chamber 19 for storing various device devices is formed, and the control valve 20 is provided as one of these device devices. It is arranged. The control valve 20 is each of the hydraulic actuators 11 to 14 provided in the front work machine 4 (boom cylinder 11, offset cylinder 12, arm cylinder 13, packet cylinder 14). Although a plurality of valves are assembled and assembled as one unit, the control valve 20 is provided on the left side of the support frame 15L of the left side (viewed from the front of the gas). In the state where the lower end of the control valve 20 floats from the upper surface of the mount frame 16, the bracket 21 is sandwiched and supported.

The control valve 20 is connected to a hydraulic pump (not shown), an oil tank, a pilot valve, and a plurality of hydraulic pipes reaching the hydraulic actuators 11 to 14 of the front work machine 4, but the front work machine 4 is connected. In the hydraulic piping connected to the hydraulic actuators 11 to 14 of (), at least a portion from the control valve 20 to the lower portion of the front work machine 4 is formed by a hydraulic hose without a connecting portion. Hereinafter, the hydraulic hose 22 for a front work machine is called.

Here, the control valve 20 has a plurality of piping connection ports 20a to which the hydraulic hose 22 for the front work machine is connected, but the piping connection ports 20a are the anti-left support frames of the control valve 20 ( 15L) side. Moreover, the opening part 15b which connects the space part S between the apparatus storage chamber 19 and the left and right support frames 15L and 15R in the lower part of the left support frame 15L is established, and the connection plate is established. In 17, a through hole 17a is formed in communication with the space S and the outside of the body.

The opening 15b of the front work machine hydraulic hose 22 connected to the pipe connection port 20a of the control valve 20 is formed in the lower part of the left support frame 15L from the lower side of the control valve 20. The through-hole 17a formed in the connecting plate 17 covering the space S formed between the left and right support frames 15L and 15R and covering the space S is opened. It penetrates below the base end of the 1st boom 5, and the two hydraulic hoses 22 for the boom cylinder 11 of the hydraulic hoses 22 for front work machines of the said 1st boom 5 A total of six hydraulic hoses 22 for the offset cylinder 12, the arm cylinder 13, and the packet cylinder 14 are pulled toward the front side from the bottom of the base end and connected to the boom cylinder 11. It is pulled to the rear side from below the base end of the 1st boom 5, and is led to the back surface of the 1st boom 5, have. On the other hand, although FIG. 2 thru | or FIG. 4 is a figure which shows the arrangement state of the hydraulic hose 22 for front work machines, the 1st boom 5 and the boom cylinder 11 are abbreviate | omitted in FIG. 3, FIG. .

Further, the hydraulic hose 22 for the front work machine is held by the holding member 23 attached to the through hole 17a in the through hole 17a portion of the connecting plate 17. The member 23 is comprised using the grommet 24 which consists of rubber materials, and the fixing plate 25 for fixing the said grommet 24 to the connection plate 17. As shown in FIG. In addition, in the figure, 26 is the band which bundles the hydraulic hoses 22 for front work machines in the upper and lower sides of the holding member 23. As shown in FIG.

The grommets 24 protrude outward from the grommets main body 24a to the outside of the grommets main body 24a to be fitted to the inner circumferential side of the through hole 17a of the connecting plate 17. For fixing, which will be described later by protruding upward from the flange portion 24b contacting the upper surface of the connecting plate 17 on the outer circumferential side of the hole 17a and the flange portion 24b. The plate engaging part 24c which engages with the recessed part 25a of the plate 25 is integrally formed, and the plate engaging part 24c and the grommet main body part 24a penetrate in the up-down direction. In this case, a plurality of hose insertion holes and holes 24d through which the front work hydraulic hose 22 is inserted are drilled and installed, and the hydraulic hoses 22 for front work machines are inserted into the hose insertion holes and 24d. A cutout 24e extending from the outer circumference of the grommet 24 to the hose insertion tube and the hole 24d is inserted. On the other hand, the grommet 24 has a safety belt (not shown) for an electric device (for example, an angle sensor for detecting the swing angle of the second boom 6 or the arm 9) installed in the front work machine 4. The seatbelt through-hole 24f through which is not penetrated) is also provided.

On the other hand, the fixing plate 25 is engaged with the outer circumferential side of the plate engaging portion 24c in a state where the fixing plate 25 is placed above the flange portion 24b of the grommets 24. At the same time, the left and right both edge portions protrude from the left and right edges of the flange portion 24b to the left and right outwards, and the fixing plate 25 is attached to the portion protruding to the left and right outer sides. A bolt insertion tube and a hole 25b through which the fixing bolt 27 for fixing to the connecting plate 17 is inserted are drilled and installed.

Then, in the state where the hose 22 for the front work machine is inserted into the hose insertion hole and the hole 24d of the grommet 24, the grommet main body portion 24a is moved from the upper direction of the connecting plate 17 to the through hole 17a. The fixing plate 25 is placed on the upper side of the flange portion 24b which is inserted into the upper surface of the connecting plate 17, and in this state, the bolt insertion hole and the hole 25b of the fixing plate 25 are placed. By screwing the fixing bolt 27 inserted from the screw hole 17b formed in the connecting plate 17, the flange portion 24b is pressed and fixed by the fixing plate 25, Thus, the grommet 24 is fixed to the connecting plate 17 by the fixing plate 25.

Here, the lower surface of the fixing plate 25 is a cylindrical spacer having a through hole 28a which is slightly larger in diameter than the bolt insertion hole and the hole 25b and is substantially concentric with the bolt insertion hole and the hole 25b. (28) is stuck. And this spacer 28 floats a little from the upper surface of the connecting plate 17 in the step before screwing the fixing bolt 27 into the screw hole 17b, but with the screwing of the fixing bolt 27 As the fixing plate 25 approaches the connecting plate 17, the lower end of the spacer 28 contacts the upper surface of the connecting plate 17, whereby the fixing plate 25 is no longer attached to the connecting plate 17. In this manner, the flange 24b can be prevented from being excessively pressed.

In the present embodiment configured as described above, the base end of the first boom 5 constituting the front work machine 4 is freely axially swinged on the left and right support frames 15L and 15R provided on the mount frame 16. And hydraulic actuators 11 to 14 (boom cylinders 11) provided in the front work machine 4 in the device storage chamber 19 formed on the left and right outer sides of the left and right support frames 15L and 15R. ), A control valve 20 for controlling the pressure oil supply control of the offset cylinder 12, the arm cylinder 13, and the packet cylinder 14} is arranged, but the hydraulic actuators 11 to 14 are controlled from the control valve 20. The hydraulic hose 22 for the front work machine which becomes the oil flow path to the oil is formed between the left and right support frames 15L and 15R from the lower side of the control valve 20 through the opening 15b opened in the left support frame 15L. It reaches the space part S to become, and is the upper part of the said space part S Through the through-hole (17a) opened in the connecting plate 17 to bokgae, and is disposed so as to reach the bottom of the base end of the front operating mechanism (4).

As a result, the hydraulic hose 22 for the front work machine is lower than the base end of the front work machine 4 through the space S formed between the left and right support frames 15L and 15R from the lower side of the control valve 20. The space required for the arrangement of the hydraulic hose 22 for the front work machine can be made as compact as possible, and in particular, a small size such as the ultra-swivel hydraulic shovel 1 of the present embodiment. In construction machinery, it becomes useful.

In addition, the hydraulic hose 22 for the front work machine penetrates the through-hole 17a established in the connecting plate 17 and is pulled from the upper swing body 3 side to the front work machine 4 side. The holding member 23 holding the hydraulic hose 22 for the front work machine is attached to the through hole 17a. Thereby, even if the hydraulic hose 22 for the front work machine which moves from the holding member 23 to the front work machine 4 follows the front work machine 4 and moves, the control member 20 will be transferred from the control valve 20 to the holding member 23. The hydraulic hose 22 for the front work machine of the leading part does not move, thereby moving the hydraulic hose 22 for the front work machine in the apparatus storage chamber 19 to interfere with other equipment, or to loosen the connection with the control valve 20. The defect can be reliably avoided, and there is no fear of oil leakage from the connector connection part, as it connects the intermediate part of the hydraulic pipe pulled from the upper swing body 3 side to the front work machine 4 side with a connector. This is excellent.

In addition, the holding member 23 has a hose insertion tube and a hole 24d through which the hydraulic hose 22 for the front work machine is inserted, and is fitted into the through hole 17a of the connecting plate 17. ) And a fixing plate 25 which is formed integrally with the grommets 24 and presses and fixes the flange portion 24b contacting the upper surface of the connecting plate 17 from the upper portion of the flange portion 24b. Consists of. As a result, the holding member 23 simply presses and fixes the flange portion 24b of the grommet 24 fitted to the through hole 17a with the fixing plate 25 from the upper portion thereof, and simply the through hole ( Since it can attach to 17a), the arrangement | positioning operation of the hydraulic hose 22 for front work machines can be performed efficiently. In addition, since the through hole 17a of the connecting plate 17 is completely blocked by the grommets 24, the soil and the like scattering during the work are separated from the through hole 17a by the space S and the equipment. Invasion in the storage chamber 19 can be prevented reliably. In addition, since the connection plate 17 is a site which is easy to become dirty by earth and sand scattering during work, cleaning such as washing is necessary, but in this case, the holding member 23 is provided on the connection plate 17. And an obstacle (for example, a connector connecting portion) other than the hydraulic hose 22 for the front work machine, there is an advantage that it is easy to clean.

In addition, of course, this invention can be applied to the various construction machines provided with the front work machine, without being limited to the ultra-twist type hydraulic shovel same as the said embodiment.

INDUSTRIAL APPLICABILITY The present invention is useful for a hydraulic piping arrangement in a construction machine such as a hydraulic shovel, and it is possible to make the space required for the hydraulic hose arrangement as compact as possible. Since it does not move in front of the front work machine, it is possible to reliably avoid the defect of interfering with other equipment or loosening the connection with the control valve, and there is no fear of oil leakage from the connector connection part, and it is excellent in maintainability. It can be said.

Claims (2)

While supporting the base end of the front work machine provided with the hydraulic actuator freely swinging on the left and right support frames installed on the mount frame, the hydraulic oil supply and discharge control of the hydraulic actuator is carried out to the left and right outwards of the support frame. In the construction machine which arrange | positions the control valve to perform, the hydraulic piping used as the oil flow path from the control valve to the said hydraulic actuator is formed between right and left support frames through the opening opened in the support frame from the lower part of a control valve. The hydraulic hose is arranged to reach the front work machine through the through hole formed in the plate-shaped member which covers the space portion, and reaches the front work machine. It is equipped with a holding member for holding a hose Hydraulic piping arrangement structure in construction machinery. 2. The holding member according to claim 1, wherein the holding member has a hose insertion tube and a hole through which the hydraulic hose is inserted, and a grommet fitted into the through hole of the plate-shaped member, which is integrally formed with the grommet and contacts the upper surface of the plate-shaped member. A hydraulic pipe arrangement in a construction machine, characterized by using a fixing plate that presses and fixes a flange portion from an upper portion of the flange portion.

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