JPS5817805Y2 - Mounting structure of swing arm drive hose - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a structure in which a flexible fluid pressure supply hose for a fluid pressure cylinder for driving a swing arm is attached to the arm at an intermediate portion thereof.

Conventionally, as disclosed in Japanese Unexamined Patent Publication No. 53-57315, this type of structure regulates the position and posture of the fluid pressure supply hose to prevent damage to the hose attachment part due to the hose falling sideways. For this reason, a holding member for clamping the hose is provided on the free end side of the lever rotatably provided on the arm so as to be rotatable around an axis parallel to the pivot axis of the lever.

Furthermore, there is also known a structure in which the lever is bent around an axis parallel to the swing axis of the lever between the holding member and the swing axis of the lever.

In the above configuration, since the hose is clamped by the holding member, the holding points of the hose and the holding member cannot be moved relative to each other, so it is impossible to move the arm only by moving the lever.
The deformation of the hose due to oil pressure changes during pressurization and depressurization cannot be completely absorbed, and the hose has the disadvantage that the hose falls sideways at the section where the hose is attached, and the section where the hose is attached is damaged.

The technical problem to be solved by the present invention is to restrict the movement of the hose in the lateral direction of the vehicle body while allowing the hose to move freely without being clamped to other objects.

The technical means taken to solve the above technical problem is that the fluid pressure supply hose or a holding member for inserting and holding the fluid pressure supply hose is slidably guided along the longitudinal direction of the arm on the side surface of the arm. The reason is that a rod-shaped guide is provided to extend in the longitudinal direction of the arm.

The above technical means works as follows.

The hose is slidably inserted and held, and is also slidably held by the rod-shaped guide along the longitudinal direction of the arm, and the guide is positioned on the side of the arm, so that the arm is moved by the hydraulic cylinder. When the hose swings, the hose moves from the position due to both deflection due to hydraulic pressure changes such as pressurization or depressurization (including zero pressure) and deflection due to swing of the arm.

At this time, the hose freely moves in the direction in which it is inserted into the holding member.

If the component force of this movement is in the direction along the longitudinal direction of the arm, the holding member inserted through the guide is moved along the guide.

That is, the rod-shaped guide does not restrict the movement of the hose via the holding member.

Therefore, the following effect occurs.

Because the above action allows the hose to move freely, no excessive horizontal force is applied to the hose attachment, and the attachment is not damaged, preventing work inefficiency caused by hydraulic leakage that stagnates the work. .

Furthermore, since the hose is restricted from moving laterally and outwardly by the arm, the hose can be protected from the danger of coming into contact with people or other objects while it is moving.

Furthermore, when the rod-like member is first fixed to the arm, it can be positioned at an optimal position taking into consideration the movement of the hose.

Embodiments of the present invention will be described below with reference to the drawings.

The crawler type traveling vehicle 1 is equipped with a swivel base 2 that can be driven to make a full rotation (360' rotation) around the vertical axis, and the swivel base 2 has cylinders 3a and 3b that are driven by fluid pressure such as oil pressure to swing vertically and It is equipped with a working arm 4, a control section 5, a driving section 6, etc. which are configured to be bendable and extendable, and a packet 7 is provided at the tip of the arm 4 so as to be rotatable by a fluid pressure cylinder 30, thereby constructing a full rotation type backhoe. It is.

The arm 4 is mounted on the swivel base 2 so as to be rotatable around the vertical axis by fluid pressure drive, and is configured to enable trench digging (grooving along the side of the vehicle body) by setting the angle of the arm 4 relative to the swivel base 2. be.

The traveling vehicle 1, the rotating base 2, the working arm 4, and the packet 7
The arm 4 is configured to be driven by fluid pressure from a pump (not shown) provided in the driving unit 6.
A flexible fluid pressure supply hose 8 for the cylinder 3a that swings the arm 4 up and down is stretched so as to protrude to the outside and have a flexible length to allow the swing of the arm 4. .

As shown in FIG. 2, a rod-shaped guide 9 is provided on the side surface of the arm 4 in its longitudinal direction. and both ends are fixed to the side surfaces of the arm 4.

Further, a two-joint ring 10 is provided in which the platform 8 is inserted into one ring, and the other ring is inserted into the rod-shaped guide 9 so that the hose 8 can be freely slid in its longitudinal direction. and,
The ring 10 is held slidably in the longitudinal direction of the arm 4.

As another embodiment, as shown in FIG. 3, the annular ring 10 of the embodiment of FIG. Both can be larger in diameter than the hose 8, and the hose 8 can be inserted directly between the gaps.

In the case of this embodiment as well, the same effects as in the case of FIG. 2 are produced.

[Brief explanation of the drawing]

The drawings show an embodiment of the mounting structure for the swing arm drive hose according to the present invention, with Fig. 1 being an overall side view of a crawler-type traveling vehicle, Fig. 2 being a perspective view of the mounting structure, and Fig. 3 showing the mounting structure. It is a perspective view showing a modification. 3a...Fluid pressure cylinder, 4...Swing arm, 8...Fluid pressure supply hose, 9...
··guide.

Claims (1)

[Scope of utility model registration request] It has a structure in which a flexible fluid pressure supply hose 8 for a fluid pressure cylinder 3a for driving the swing arm 4 is attached to the arm 4 in the middle thereof, and the fluid pressure supply hose 8 is attached to the side of the arm 4. A rod-shaped guide 9 is provided to extend along the longitudinal direction of the arm 4 to slidably guide the hose 8 or a holding member 10 through which the fluid pressure supply hose 8 is inserted and held. A mounting structure for a swing arm drive hose, which is characterized by: