JPH0124208Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention consists of attaching the distal end portion of the arm to the proximal end portion of the arm rotatably connected to the boom using a hydraulic cylinder so that it can slide and be fixed in the longitudinal direction of the arm. , a hydraulic cylinder for rotating the bucket is attached to the tip side of the arm,
A holder for a pressure oil hose installed in a bent state across the boom and the hydraulic cylinder for rotating the bucket is attached to the base end of the arm, and the pressure oil is removed by bending as the arm tip side changes the sliding position. This invention relates to an improvement in a hose holding part for an excavation work vehicle, in which a holder prevents a hose from protruding laterally to prevent damage to the hose due to contact with other objects caused by the protrusion.

Conventionally, as shown in FIG. 5, the hose holding section of the excavating vehicle has been constructed using a bent rod that forms a long hole 17' for the hose insertion in the side wall of the arm base end portion 7A in cooperation with the side wall of the arm base end portion 7A. A rod-shaped holder 19' was installed to prevent the insertion hose 15 from bulging laterally due to bending, but due to its structure, the hose 15 would not bend when the hose 15 was bent. Since the part of the hose 15 hangs down considerably, if the arm 7 is bent and swung with respect to the boom 6 while it is in the hanging state, the hanging part of the hose 15 will be caught between the arm 7 and the boom 6. There was a risk of accidental breakage, and there was still room for improvement in the protection of the pressure oil hose.

The purpose of the present invention is to provide a rational improvement to the holder to reliably prevent the pressure oil hose from being damaged due to contact with other objects or being caught between the arm and the boom.

A characteristic configuration of the hose holding portion according to the present invention is that in the above-mentioned excavation work vehicle, the holder is formed of a bent plate-like member that forms a receiving groove for the pressure oil hose in cooperation with the side wall of the proximal end portion of the arm. , and a rod-shaped body that prevents the pressure oil hose from coming off from the receiving groove.The functions and effects thereof are as follows.

In other words, as shown in FIGS. 2 and 3, due to the receiving action of the bent plate-like member 16 and the detachment-preventing action of the rod-like member 18, when the arm tip end portion 7B is slid toward the hose loosening side, The arm proximal end portion 7 is wound in such a manner that the flexible portion of the hose 15 is wound around the rod-shaped body 18 while reliably preventing the flexible portion of the hose 15 from protruding laterally and hanging down.
Since the position can be reliably held on the side of A, there is no risk of damage to the hose due to contact with other objects due to the extension of the hose to the side, or from the hanging part of the hose getting caught between the arm and the boom. It has been possible to provide a hose holder for an excavation work vehicle that can reliably prevent any damage to the hose and is extremely excellent in terms of protecting the pressure oil hose.

Next, an embodiment will be described based on FIGS. 1 to 4.

A swivel base 4 equipped with a boarding and driving section 2 and a driving section 3 is attached to a machine base equipped with a pair of left and right crawler traveling devices 1, and at the tip of a boom 6 that can be vertically swung by a hydraulic cylinder 5, An excavation work device 11 is constructed by connecting an arm 7 with a hydraulic cylinder 8 so that it can be rotated freely, and a bucket 9 connected to the tip of the arm 7 with a hydraulic cylinder 10 so that it can be rotated. It is attached to the cylinder 12 so that it can be swung left and right, and together constitutes an excavation work vehicle.

The arm 7 is provided with an arm proximal end portion 7A that is pivotally connected to the boom 6, and an arm distal end portion 7B that is connected to the bucket and that is internally supported and slidably slidable in the longitudinal direction of the arm proximal end portion 7A. The cylindrical arm proximal end portion 7A is divided into arms, and the arm distal end portion 7A is formed separately.
A hydraulic cylinder 13 for extending and retracting the arm for changing the sliding position and fixing the bucket B is installed internally, and a pivot bracket 14 for connecting the base end of the cylinder tube side of the hydraulic cylinder 10 for rotating the bucket is attached to the upper surface of the arm base end portion 7A. A hydraulic cylinder 8 for driving the arm swing is fixedly installed at the base end of the arm distal end portion 7B so as to be inserted into the guide notch formed in the guide notch.
A piston rod is pivotally connected to the arm proximal end portion 7A.

Hydraulic cylinder 10 for bucket rotation and boom 6 whose position is changed integrally with arm tip side portion 7B
To construct the holding structure for the pressure oil hose 15 which is bent over both sides, a bent plate member 16 having an L-shaped cross section is assembled with the side surface of the arm proximal end portion 7A. The hose is fixed to the base end portion 7A of the arm so as to form a hose receiving groove 17 that opens upward and extends in the longitudinal direction of the arm. The rod-shaped body 18 is constructed across the side wall of the bent plate-shaped body 16 and the side wall of the arm proximal end portion 7A, and the bent plate-shaped body 16 and the rod-shaped body 8 constitute a hose holder 19. Lateral overhang of the flexible portion of the hose when the arm 7 is shortened;
The bending plate-like member 16 prevents the hose from hanging downward, and the rod-like member 18 prevents it from coming off, so that the flexible portion of the hose is wound around the rod-like member 18 and is placed next to the arm proximal end portion 7A. It is configured to be held close to the side.

In other words, the hose 15 is prevented from being damaged due to contact with other objects due to overhanging or hanging down, or from being caught between the arm 7 and the boom 6.

Incidentally, the bent plate-like body 16 forming the holder 19,
The specific shape of the rod-shaped body 18 can be modified in various ways, and the specific mounting positions of both 16 and 18 with respect to the side surface of the arm proximal end portion 7A can also be changed as appropriate.

[Brief explanation of the drawing]

1 to 4 show embodiments of the present invention,
Fig. 1 is an overall side view of the excavation work vehicle, Fig. 2 is an enlarged partially cutaway side view showing the arm in the shortened state, Fig. 3 is an enlarged side view showing the arm in the extended state, and Fig. 4 is the same as in Fig. 2. 5 is an enlarged side view showing the conventional structure. 6...Boom, 7A...Arm base end portion, 7
B... Arm tip side part, 8, 10... Hydraulic cylinder, 9... Bucket, 15... Pressure oil hose,
16...Bent plate-shaped body, 17...Receiving groove, 18...
Rod-shaped body, 19... holder.

Claims (1)

[Scope of utility model registration request] The arm tip end portion 7B is attached to the arm proximal end portion 7A rotatably connected to the boom 6 by a hydraulic cylinder 8 so as to be slidable and fixed in the longitudinal direction of the arm, and the bucket 9 and the bucket 9 are rotated. A hydraulic cylinder 10 to be moved is attached to the arm distal end portion 7B, and a holder 19 for the pressure oil hose 15, which is bent and installed across the boom 6 and the bucket rotation hydraulic cylinder 10, is attached to the arm proximal end portion 7A. In the excavation work vehicle attached to the holder 19, the holder 19 is attached to the bent plate-like body 16 which forms the receiving groove 17 for the pressure oil hose 15 in cooperation with the side wall of the arm base end side portion 7A, and the receiving groove 17. A hose holding portion for an excavating vehicle, which is formed by a rod-shaped body 18 that prevents the pressure oil hose 15 from coming off from the groove 17.