JPH0483025A - Supporting mechanism for bucket cylinder hose - Google Patents

Abstract

PURPOSE:To prevent damage by winding a pressure oil hose, supplying a pressure oil to a bucket cylinder, from the upper surface of a main boom to the lower side of the tip, and moreover Z-shapedly arranging the pressure oil hose on the upper side of a bucket arm rear end via an intermediate joint. CONSTITUTION:A pressure oil pipe 16 is arranged in a recessed part provided on the upper surface of a main boom 2, and also a bypass pressure oil hose 10 is extended to the lower part along the circular arc part 2a of the boom 2 tip via a pressure oil joint 7. Next an elastic pressure oil hose 15 and the hose 10 are connected via an intermediate joint 9 in a condition where a bucket arm 1 and the boom 2 are made a straight line state. Then the hose 15 is made parallel to the circular arc part 2a and the circular arc part 1a of the arm 1 rear end to be extended upwardly. Moreover the hose 15 is passed on the inner side of a cylinder bracket 11 to be connected to a bucket cylinder 4. This can prevent the outer damage to the hose and improve outer appearance.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial field of application The present invention is applicable to a backhoe, etc., which is equipped with a 7Xi-ke-shito that performs lifting/lowering rotation and scooping-rotation using a bucket-throat cylinder.・Related to the support and arrangement mechanism for the pressure oil hose that sends pressure oil to the throat cylinder.

(B) Prior Art Conventionally, in structures such as backhoes equipped with a bucket/throat cylinder, the pressure oil hose has been exposed to the outside of the bucket arm 1, as shown in FIGS. 10 and 11.

FIG. 10 is a diagram showing the arrangement of a conventional elastic pressure oil hose 26, and FIG. 11 is a perspective view of the same conventional main boom 2, bucket arm 1, and bucket 3.

A hose that supplies pressure oil to the bucket cylinder 4, which is interposed between the bucket arm 1 and the bucket 3 in order to rotate the bucket 3, is connected to the main boom by a pressure oil pipe 27 placed on the main boom 2. The oil is sent to the pressure oil joint 7 on the boom 2, and is passed from the pressure oil joint 7 to the elastic pressure oil hose 26, and the elastic pressure oil hose 26 is exposed to the outside of the bucket arm 1 and attached to the bucket. It was even connected to the pressure oil joint 8 on the side of the cylinder 4.

Since the elastic pressure oil hose 26 is bent at the pivot shaft 14 between the main boom 2 and the bucket arm 1, it should be bent at the tip of the main boom 2 to avoid being pinched or damaged at this time. It formed a relaxing detour.

Reference numeral 11 denotes a cylinder bracket, on which the rear end of the bucket cylinder 4 is pivotally supported by a pivot shaft 12, and the tip of the arm cylinder 5 is pivotally supported by a pivot shaft 13, and the cylinder bracket 11 itself is pivoted by a pivot shaft 12. Support shaft 14
It is integrated with.

(c) Problems to be Solved by the Invention Conventional pressure oil hoses were constructed as described above, so when the aircraft turns or swings, the pressure oil hoses may collide with obstacles and be damaged. There was a problem.

There was also the problem that the extra parts sagged on the outside, making it look unsightly.

The present invention solves these problems of the prior art.

(d) Means for Solving the Problems The problems to be solved by the present invention are as described above. Next, the means for solving the problems will be explained.

In a configuration in which a bucket arm 1 is pivotally supported at the tip of the main boom 2, a bucket throat 3 is pivotally supported at the tip of the bucket arm 1, and a cylinder 4 is interposed between the bucket arm 1 and the bucket 3. , a pressure oil hose that supplies pressure oil to the bucket throat cylinder 4 on the bucket arm 1 via the main boom 2, passes over the main boom 2, wraps around the tip of the main boom 2, and connects it to the lower intermediate joint 9. guide you to
From the intermediate joint 9, an elastic pressure oil hose 15 is connected from the rear end of the bucket throat arm 1 to the joint 8 of the bucket cylinder 4 by passing through the inside of the cylinder bracket throat 11.

Further, the tip of the main boom 2 and the rear end of the bucket arm 1 are arcuate and run along an elastic pressure oil hose.

(E) Embodiment The problems to be solved by the present invention and the means for solving them are as described above.Next, the structure of the embodiment shown in the attached drawings will be explained.

Fig. 1 is an overall side view of the backhoe, Fig. 2 is a side view showing the support mechanism of the bucket cylinder hose of the present invention, Fig. 3 is a plan view, Fig. 4 is a side sectional view, and Fig. 5 is the same. The bottom view, Figure 6 is a side view showing the structure of fixing the pressure oil pipes 16 and 2o on the main boom 2, Figure 7 is a plan view, Figure 8 is a front sectional view, and Figure 9 is the main boom. FIG. 2 is a side view of a state in which pressure oil pipes 16 and 2o are fixed to a recess 2b of the boom 2.

In FIG. 1, a fuselage frame F is supported on a crawler type traveling device C so as to be able to rotate completely.

A main boom 2 is pivotally supported at the front part of the body frame F so as to be swingable left and right, and a boom cylinder 6 is interposed between the main boom 2 and a bracket 22 on the lower surface of the main boom 2 so as to be rotatable up and down.

A bucket arm 1 is pivotally supported at the tip of the main boom 2 via a pivot shaft 14, and a bucket 3 is pivotally supported at the tip of the bucket arm 1. An arm cylinder 5 is interposed between the cylinder bracket 11 and a bracket 21 at the upper part of the main boom 2, and a bucket cylinder 4 is interposed between the bucket arm 1 and the bucket 3.

The present invention relates to an elastic pressure oil hose 15 and an intermediate joint 9 that supply pressure oil to the bucket cylinder 4.

With reference to FIGS. 2, 3, 4, and 5, the configuration of the main parts of the present invention will be explained.

First, the main part of the present invention is that, conventionally, the elastic pressure oil hose 26 is
Although it was placed outside as shown in FIGS. 0 and 11, in the present invention it is placed inside the bucket arm 1 and further inside the cylinder bracket 11.

Inside the bucket arm 1, there is also a cylinder bracket)
11, it is necessary to effectively store the elastic pressure oil hoses 15a and 15b, which have become available, in this narrow space, and as shown in Fig. 2, the bucket arm 1 and main boom 2 are In a straight line state due to the pivot shaft 14, between the arcuate portion 2a at the tip of the main boom 2 and the arcuate portion 1a at the rear end of the bucket arm 1,
It is structured so that it can be stored by bending in a ``Otsu'' shape.

In this way, the elastic pressure oil*-s 15 is directly connected between the pressure oil joints 7a and 7b on the upper part of the main boom 2 and the pressure oil joints 8a and 8b of the bucket cylinder 4 so as to bend in an "Otsu" shape.
Instead of connecting by a and 15b, first, detour pressure oil hoses 10a and 10b are extended to below the arc-shaped part 2a of the main boom 2, and intermediate joints 9a and 9b are installed by fixing to this part. It was.

Then, the elastic pressure oil hoses 15a and 15b extending from the intermediate joints 9a and 9b are placed inside the cylinder bracket 11 along the arcuate portion 2a and the arcuate portion 1a, and the bucket is Put it out on top of arm 1,
It is connected to pressure oil joints 8a and 8b on the side of the bucket cylinder 4.

With this configuration, when the bucket arm l rises, it is stored in an "Otsu" shape as shown in Figure 2,
When the bucket arm 1 is lowered, the bent portion extends and comes into contact with the arcuate portions 2a and 1a, as shown in FIG.

Therefore, since the arc-shaped portion 1a and the arc-shaped portion 2a that the elastic pressure oil hoses 15a and 15b come into contact with are arc-shaped, it is possible to prevent the elastic pressure oil hoses 15a and 15b from being caught between them. No, elastic pressure oil hoses 15a and 15b
It is less likely to cause damage to the

6, 7, 8, and 9, the storage arrangement of the pressure oil pipes 16 and 20 on the upper surface of the main boom 2 will be explained.

Conventionally, the pressure oil pipe 27 on the upper surface of the main boom 2 was also exposed as shown in FIGS. 10 and 11.

However, in this state, there is a risk of injury due to collision with an obstacle, so in this configuration, a recess 2b is provided extending on the upper surface of the main boom 2, and a pressure oil pipe 16 is inserted into the recess 2b.
- 20 was inserted and the pipe covers 17 and 18 were covered over it.

The pipe covers 17 and 18 are covered with the pressure oil pipes 16 and 20 housed, and nuts are screwed onto the fixing bolts 19 to fix the pipe covers 17 and 18.

(F) Effects of the Invention Since the present invention is constructed as described above, it has the following effects.

As in claim (1), a bucket arm 1 is pivotally supported at the tip of the main boom 2, a bucket 3 is pivotally supported at the tip of the bucket arm 1, and a bucket cylinder 4 is interposed between the bucket arm 1 and the bucket 3. In this configuration, a pressure oil hose that supplies pressure oil to the bucket cylinder 4 on the bucket arm 1 via the main boom 2 passes over the main boom 2, wraps around the tip of the main boom 2, and connects the pressure oil hose to the lower middle part. Since the elastic pressure oil hose 15 is connected to the joint 8 of the bucket cylinder 4 from the rear end of the bucket arm 1 through the intermediate joint 9, passing through the inside of the cylinder bracket 11, the elastic pressure oil hose 15a・The part 15b is the pivot shaft 1
Since the part 4 is not exposed to the outside, when the main boom 2 moves up and down while the aircraft is traveling, the elastic pressure oil hoses 15a and 15
This prevented an accident in which part b collided with an obstacle and was damaged.

Furthermore, since the elastic pressure oil hoses 15a and 15b could be hidden inside, the design of the exterior could be improved.

As in claim (2), the tip of the main boom 2 and the rear end of the bucket arm 1 are arcuate and run along the elastic pressure oil hose, so that the tip of the main boom 2 and the rear end of the bucket arm 1 The elastic pressure oil hose 15 stored in the space between the parts will not be damaged due to being caught between the parts.
When the bucket arm 1 moves up and down, the elastic pressure oil hose 15 can be smoothly expanded and contracted.

[Brief explanation of the drawing]

Fig. 1 is an overall side view of the backhoe, Fig. 2 is a side view showing the support mechanism of the bucket cylinder hose of the present invention, Fig. 3 is a plan view, Fig. 4 is a side sectional view, and Fig. 5 is the same. A bottom view, FIG. 6 is a side view showing the configuration of fixing the pressure oil pipes 16 and 20 on the main boom 2, FIG. 7 is a plan view, FIG. 8 is a front sectional view, and FIG. 9 is a main boom. A side view of the pressure oil pipes 16 and 20 fixed to the recess 2b of the boom 2, and FIG. 10 shows the conventional elastic pressure oil hose 2.
11 is a perspective view of the conventional main boom 2, bucket arm 1, and bucket 3. 1 ・ ・ ・ 2 ・ ・ ・ 1 a, 2 3 ・ ・ ・ 4 ・ ・ ・ 5 ・ ・ ・ ・Bucket arm・Main boom a...Circular part・Bucket・Bucket cylinder・Arm cylinder・Boom cylinder・Pressure Oil fittings/intermediate fittings/detour pressure oil hoses Applicant Seirei Kogyo Co., Ltd. Agent Patent attorney Toshibe Yano Diagrams and diagrams

Claims (2)

[Claims] (1), a bucket arm 1 is pivoted to the tip of the main boom 2, a bucket 3 is pivoted to the tip of the bucket arm 1,
In a configuration in which a bucket cylinder 4 is interposed between the bucket arm 1 and the bucket 3, a pressure oil hose that supplies pressure oil to the bucket cylinder 4 on the bucket arm 1 via the main boom 2 is connected above the main boom 2. passing through, winding the tip of the main boom 2 and guiding it to the lower intermediate joint 9,
A bucket cylinder hose support mechanism characterized in that an elastic pressure oil hose 15 is connected from the rear end of the bucket arm 1 through the intermediate joint 9 to the joint 8 of the bucket cylinder 4 by passing through the inside of the cylinder bracket 11. (2) the tip of the main boom 2 according to claim (1);
A support mechanism for a bucket cylinder hose, characterized in that the rear end of a bucket arm 1 is arcuate and runs along an elastic pressure oil hose.