JP2737034B2 - Excavator piping structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piping structure applicable to a power shovel, and more particularly, to a piping structure of a power shovel in which a control valve in a swing frame supplies pressure oil to hydraulic equipment on a boom. .

[0002]

2. Description of the Related Art In a power shovel of this type, the other end of a swing post whose center is rotatably supported above and below a support pin erected on a boom mounting portion of a swing frame is connected to a swing cylinder. The structure is a general structure. And for conventional excavators,
A piping structure has been adopted in which a number of hydraulic hoses protruding outward from the swing frame are arranged on both left and right sides of the boom, and the hydraulic hoses on the left and right sides of the boom are connected to hydraulic equipment on the boom.

[0003]

However, in the conventional piping structure described above, even if the driver's seat is biased to the right or left side of the boom, a large number of hydraulic hoses arranged on the left and right sides of the boom require the driver. There was a problem that it became a factor that hindered the view by standing in front of the forest. Furthermore, the piping work of the hydraulic hose that goes to the right side or the left side of the boom and is performed at both positions is very troublesome, and it is required to work at one of the fixed positions. There was.

Accordingly, the present invention has been made in view of the above-mentioned conventional circumstances to solve the problem, and a hydraulic hose on one side of the boom is detoured around an outer periphery of a support pin provided on a boom mounting portion. By connecting the joint to a joint on the other side of the boom, a piping structure of a power shovel that can be concentratedly connected to the other side of the boom is provided.

[0005]

The present invention for achieving the above object for solving the problem] is the swing post rotatably and pivotally supported on support pin erected on the boom mounting portion of the swing frame, the scan <br/> Ing Of the boom and boom cylinder above and forward of the post
The lower ends are pivotally connected, and the swing
The cab is provided on one side of the boom on the over arm, a further power shovel pivotally connecting the connecting portion and extending in the boom the other side of the Su <br/> Guposuto the swing cylinder, the Sui <br /> mount only the control valve to the cab presence side ring frame, a plurality of swing having one end connected to the the valve
The hydraulic hose frame side, stretch flexible portion through to bypass <br/> outside径回Ri of the boom mounting portion street the support pin Rutotomoni, a plurality of which together provided on the connecting part di < connected to one end of the br /> Yointo, further to the other end of the joint
A plurality of boom-side hydraulic hose is obtained by connecting.

[0006]

[Work] Therefore, the other end 3a of the swing post 3 pivotally supported up and down on the support pin 4 erected on the boom mounting portion 2 of the swing frame 1 is connected to the swing cylinder 5. The hydraulic hose 9 on one side of the boom connected to the control valve 16 attached to the driver's seat side of the swing frame 1 is effectively used by the power shovel of 4 is connected to a joint 12 provided on the other side of the boom by bypassing the outer periphery.

By connecting the other end of the joint 12 to hydraulic devices 20 and 21 on the boom 6 via another hydraulic hose 11, the hydraulic hoses 9 and 11 are connected on the other side of the boom 6, and the left and right sides of the boom 6 are connected. Since it is not necessary to dispose on both sides, hydraulic hoses protruding outside from the swing frame are disposed on both the left and right sides of the boom as in the related art, so that the forward view of the driver sitting on the driver's seat 22 is obstructed. Or the troublesome plumbing work performed at both positions by moving to the right or left of the boom is eliminated.

Further, even when the swing post 3 is provided so as to be rotatable around the support pin 4 erected on the boom mounting portion 2, the control valve 16 on one side of the swing frame 1 passes through the boom mounting portion 2. By disposing the hydraulic hose 9 so as to bypass around the outer diameter of the support pin 4, the expansion and contraction accommodating portion 19 is easily provided by utilizing the space therebetween, and the swing of the swing post 3 becomes smooth.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the drawings showing the present invention as an embodiment will be described. Excavator P as shown in FIGS.
Is equipped with a swing frame 1 that can turn around a vertical axis S, and a boom mounting portion 2 is provided at the tip of the swing frame 1. The boom mounting portion 2 includes a base mounting plate 2a fixed to the swing frame 1 side, an upper plate 2b, a middle plate 2c, and a lower plate 2d extending forward from the mounting plate 2a. This boom mounting part 2
A boss 4a, in which a vertical support pin 4 is fitted to the center, is fixed to the front side. The center of the swing post 3 is pivotally connected to the upper and lower sides of the support pin 4 so as to be rotatable. Connecting part 3 extended to the right side of post 3
a is pivotally connected to one end of a swing cylinder 5 disposed on the other side of the machine.

As shown in FIGS. 3 and 5, the swing post 3 has a lower end of a boom 6 above the boom connecting pin 1.
4 and a boom cylinder 7 in front of it.
Is pivotally connected via a connecting pin 15. As shown in FIG. 2, a control valve 16 is attached to the left inner side of the swing frame 1 centering on the support pin 4. The plurality of frame-side hydraulic hoses 9 having one ends connected to the control valve 16 change their direction from the lateral direction to the front when passing through the through holes 17 opened in the mounting plate 2a as shown in FIGS. At the same time, the direction change portion is formed in the expansion / contraction portion 19.
The hydraulic hose 9 extends forward from the expansion and contraction portion 19 through the space between the upper plate 2b and the middle plate 2c, and turns rightward around the outer diameter of the boss 4a in which the support pin 4 is fitted. The end is fixedly connected to one end of each joint 12 provided on the connecting portion 3a of the swing post 3.

Each of the joints 12 is formed in an L-shape as shown in FIG.
The direction of the hydraulic oil from the hydraulic hose 9 fixed to the frame 1 and fixed to the frame 3 is turned upward by approximately 90 degrees, but the other end of each joint 12 is provided separately from a plurality of hydraulic pressures on the boom side. The hose 11 is connected to hydraulic equipment such as a boom cylinder 7, an arm cylinder 20, and a bucket cylinder 21 on the boom 6. In addition, reference numeral 25 shown in FIG. 1 is a crawler, 26 is a leveling plate, and 27 is a bucket.

Next, as shown in FIG. 2, the pivot axis S of the swing frame 1 is disposed on the fuselage center line K, but the driver's seat center line G is located on the left side of the fuselage center line K by a distance L. And the support pin 4 which is the center of rotation of the boom 6
Are located to the right by a distance H from the fuselage center line K, so that the boom 6 is not located in front of the driver's seat 22.

Also, as shown in FIG. 6 to FIG.
Has a rectangular through-hole 17 formed therein. The through-hole 17 has a guide 23 (usually a metal rod, usually a metal rod, which is a round bar or the like) through which the frame-side hydraulic hose 9 is guided while sliding. (Other materials may be used.)
The guide 23 is located on the left side of the through hole 17 and the through hole 1 in front view.
7 is formed in an L-shape for guiding the lower side or a square shape surrounding the periphery of the through hole 17, as shown in FIG.
When the hydraulic hose 9 moves through the through hole 17 in the direction of the arrow with the movement of the swing post 3, the outer diameter of the
To prevent damage due to contact with the edge of the frame.

Further, on the left side of the swing post 3, a regulating piece 24 (FIGS. 4 and 5) opposed to a portion detouring around the outer periphery of the support pin 4 of the hydraulic hose 9 is attached. The side is formed with a curved surface that curves outward. On the other hand, in FIG. 4, when the swing post 3 turns from the position A to the position C via the position B, the frame-side hydraulic hose 9 has the expansion / contraction portion 19 in the X state at the position A, the Y state at the position B, and Although the state changes to the Z state which is the most slack at the C position, the inside of the boom mounting portion 2 is used because the restriction piece 24 restricts the support pin 4 bypass side of the hydraulic hose 9 in the Z state so as not to protrude outward. The stored hydraulic hose 9 can be easily stored. The swing post 3 is approximately 50 ° between the center D and the right turning limit angle E on the other side of the boom where the driver's seat 22 does not exist.
On the one side of the boom where the driver's seat 22 exists, and the turning angle on the side where the driver's seat 22 exists is large.

According to the present invention, a bent portion of a hydraulic hose is formed around a support pin 4 for supporting a swing post 3 and a path from a front end of a swing frame 1 to a boom mounting portion 2 to form an S-shape as a whole. Therefore, even if the swing post 3 is turned greatly, the path of the hydraulic hose changes only slightly, and the hydraulic hose can be deformed flexibly without generating a large force.

[0016]

As it has been described above, according to the present invention present invention, the double
Connect a number of joints to the other side of the swing post boom
Provided above, with multiple frames at one end of this joint
Connect the hydraulic hose on the
Connect multiple boom hydraulic hoses to the other end of the
Connection and maintenance of multiple hydraulic hoses and joints
Intensively in one place without moving the work position
Work efficiency is good.

The hydraulic hose is provided with a swing post block.
Joint on the connecting part that extends to the other side of the
Side of the boom on the swing frame
Obstructs the driver in the driver's seat provided in
This is resolved.

Further, even if the swing post is provided so as to be rotatable around the support pin of the boom mounting portion,
By disposing a hydraulic hose that passes around the outer diameter of the support pin from the control valve on one side of the swing frame and passes through the boom mounting portion, it is possible to easily provide the expansion / contraction portion by utilizing the space therebetween. Therefore, centralized piping can be provided on the other side of the boom.

[0019]

[Brief description of the drawings]

FIG. 1 is an overall side view of a power shovel.

FIG. 2 is a plan view of the power shovel with a boom and a cabin removed.

FIG. 3 is a side view of a main part showing piping of a hydraulic hose.

FIG. 4 is a plan view of a main part showing piping of a hydraulic hose.

FIG. 5 is a front view of a main part.

FIG. 6 is an enlarged plan view of a main part showing a guide provided in a through hole.

FIG. 7 is an enlarged side view of a main part showing a guide provided in a through hole.

FIG. 8 is an operation explanatory view of a guide provided in a through hole.

[Explanation of symbols]

1 swing frame 2 boom mounting part 2a
Mounting plate 2b Upper plate 2c Intermediate plate 3
Swing post 3a Connecting part 4 Support pin 4a Boss 5 Swing cylinder 6 Boom 7 Boom cylinder 9 Hydraulic hose on frame side 11 Hydraulic hose on boom side 12 Joint 13 Bracket 16 Control valve 17 Through hole 19 Telescopic section 20 Hydraulic cylinder 20 Hydraulic cylinder 21 Hydraulic Cylinder 22 Driver's seat 23 Guide 24 Regulation piece.

Claims (1)

(57) [Claims] 1. A swing post rotatably and pivotally supported on support pin erected on the boom mounting portion of the swing frame,
Boom and boom series above and in front of this swing post
Pivotally connect the lower ends of the
A driving cab provided on one side of a boom on a swing frame, and a connecting portion extending to the other side of the boom of the swing post further pivotally connected to a swing cylinder ;
Serial attached only to the control valve to the cab presence side of the swing frame, a plurality of scan having one end connected to the the valve
The hydraulic hose queuing frame side, stretch flexible portion through the diverts outer径回Ri of the boom mounting portion street the support pin Rutotomoni were collectively provided on the connecting part double
The number of connected to one end of Jiyointo, further piping structure of a power shovel the hydraulic hoses of the plurality of boom side to the other end of the joint formed by connection.