JPH0519394Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to hydraulic piping for a swing type excavator.

Conventional technology In a swing type excavator in which a working machine equipped with a bucket is attached to the vehicle body so as to be able to swing freely, the hydraulic piping that supplies pressure oil from the vehicle body to the working machine is connected via a swivel joint installed at the center of the swing. Some are known in which a rubber hose is bent upward from the vehicle body to the working machine.

Problems to be Solved by the Invention The former type of hydraulic piping is prone to oil leakage within the swivel joint, and is expensive as it uses an expensive swivel joint.

If the latter type of hydraulic piping is used, the rubber hose may be twisted and damaged due to fatigue when the work equipment is rotated from side to side relative to the vehicle body, and may also be damaged due to interference with various parts, and furthermore, it may be damaged due to collision with earth and sand. There are things to do.

[Means and actions for solving problems]

A bracket 2 is attached to the vehicle body 1 so as to be rotatable left and right about a vertical shaft 3, and a swing cylinder 7 is connected between the bracket 2 and the vehicle body 1.
In a swing-type excavator in which a boom 6 of a working machine 5 equipped with a bucket 4 is connected so as to be movable up and down,
Inner and outer guides 22, 2 are connected at a predetermined interval and have a substantially arc shape centered on the center X of the vertical axis 3.
3, the inner guide 22 thereof is attached to the bracket 2 along one left and right side of the outer peripheral surface of the vertical shaft 3 bordering on the vertical axis center X, and the inner and outer guides 22, 2
A rubber hose is arranged horizontally between 3, one end of this rubber hose is connected to a pipe attached to the boom 6 of the working machine 5, and the other end of the rubber hose is bent horizontally and attached to the vehicle body 1. Hydraulic piping of a swing excavator connected to a valve.

As a result, when the swing cylinder 7 is expanded and contracted and the bracket 2 is rotated left and right around the vertical axis 3, when the work implement 5 is rotated left and right around the vertical axis 3, one end of the rubber hose and the inner and outer parts of the rubber hose are rotated. Guide 22,2
3 is displaced left and right along with the bracket 2, and the other end of the rubber hose is displaced along the inner and outer guides 22 and 23 in a substantially arcuate trajectory around the vertical axis center X, so that the rubber hose does not get twisted. In addition, since the rubber hose is covered by the inner and outer guides 22 and 23, there is no interference with various parts or collision of earth and sand, which prevents damage to the rubber hose and improves durability. Since there are no rubber hoses, there will be no oil leaks or high costs, and since the rubber hoses are installed horizontally, the forward visibility will not be obstructed and the forward visibility will be improved.

Example A swing type excavator has a bracket 2 attached to a vehicle body 1 so as to be rotatable left and right about a vertical shaft 3.
A boom 6 of a working machine 5 equipped with a bucket belt 4 is attached to the body, and a swing cylinder 7 is connected between the bracket 2 and the vehicle body 1, so that the working machine 5 can swing left and right.

The bracket 2 includes a vertical member 2a, upper and lower horizontal members 2b,
2c is approximately U-shaped, and the upper and lower horizontal members 2b, 2c are connected to the upper and lower mounting protrusions 1a, 1b of the vehicle body 1 so as to be rotatable left and right on a vertical shaft 3, and the boom 6 is pivoted with a pin 8 so as to be movable up and down. The boom 6 and the bracket 2 are connected by a boom cylinder 9, and the boom 6 has an arm 10 connected to the arm cylinder 1.
A bucket 4 is connected to an arm 10 so as to be vertically movable.A bucket 4 is connected to an arm 10 so as to be vertically movable.A pair of bucket hoses 13, 13 connected to the bucket cylinder 12 are connected to a bracket 2. are connected to a pair of left and right bucket pipes 14, 14 attached to both left and right ends of the vertical member 2a, and a pair of arm hoses 15, 15 connected to the arm cylinder 11 are connected to both left and right ends of the vertical member 2a. Installed pair of left and right boom pipes 16, 16
A pair of boom hoses 17, 17 connected to the boom cylinder 9 are connected to a pair of left and right boom pipes 1 attached to both left and right ends of the vertical member 2a.
Connected to 8 and 18.

The ends of each of the pipes are located on one side of the vertical axis center X, and are connected to a pair of bucket hoses 19, 19, arm hoses 20, 20, and boom hoses 21, 21 on the vehicle body side, respectively, Each hose is curved and placed horizontally between the inner and outer guide plates 22 and 23 in a substantially arc shape centered on the vertical axis center X, and then the intermediate portion is fixed to the vehicle body 1 with a clamp 24, and the other end is fixed to the vehicle body 1 with a clamp 24. Bucket valve 25, arm valve 26, boom valve 27
are connected to each.

The inner and outer guide plates 22 and 23 are connected at a predetermined distance by a pair of spacers 28 and 28, and are attached to the vertical member 2a of the bracket 2.

When the bracket 2 is rotated left and right, each pipe is also rotated around the vertical axis center X, and each hose connected to the vehicle body is moved from the inner and outer guides
2 and 23, each hose will not be twisted.

Moreover, since it is covered by the inner and outer guides 22 and 23, it does not interfere with other members, and since it does not collide with earth and sand, it is prevented from being damaged.

Furthermore, since each hose on the vehicle body side is arranged horizontally, the operator's forward view is not obstructed, improving visibility.

[Effect of idea]

By extending and contracting the swing cylinder 7 and rotating the bracket 2 left and right around the vertical axis 3, when the work implement 5 is rotated left and right around the vertical axis 3, one end of the rubber hose and the inner/outer guide 22, 23 is displaced to the left and right along with the bracket 2, and the other end of the rubber hose is displaced along the inner and outer guides 22 and 23 in a substantially arcuate trajectory about the vertical axis center X, so that the rubber hose does not get twisted. In addition, since the rubber hose is covered by the inner and outer guides 22 and 23, there is no interference with various parts or collision of earth and sand, which prevents damage to the rubber hose and improves durability. Since there is no rubber hose, there will be no oil leaks or high costs, and since the rubber hose is installed horizontally, it will not obstruct the forward view, improving forward visibility.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; Fig. 1 is a front view of the main parts, Fig. 2 is a plan view, Fig. 3 is a front view with the rubber hose on the vehicle body side omitted, Fig. 4 is a plan view, and Fig. 5 is a plan view. is an overall plan view. 1 is the vehicle body, 3 is the vertical axis, 4 is the bucket, and 5 is the work equipment.

Claims (1)

[Claims for Utility Model Registration] A bracket 2 is attached to a vehicle body 1 so as to be rotatable left and right about a vertical shaft 3, a swing cylinder 7 is connected between the bracket 2 and the vehicle body 1, and the bracket 2
In a swing-type excavator in which a boom 6 of a working machine 5 equipped with a bucket belt 4 is connected so as to be movable up and down, the boom 6 is connected at predetermined intervals in a substantially arc shape centered on the center X of the vertical shaft 3.・Outer guide 22,
23 is attached to the bracket 2 with its inner guide 22 along one side of the outer circumferential surface of the vertical shaft 3 bordering on the vertical axis center X, and a rubber hose is horizontally arranged between the inner and outer guides 22 and 23. One end of the rubber hose is connected to a pipe attached to the boom 6 of the working machine 5, and the other end of the rubber hose is bent horizontally and connected to a valve attached to the vehicle body 1. Hydraulic piping for swing type excavators.