JPH0752199Y2 - Backhoe operating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a structure of an assist bar arranged above a control column in a small backhoe.

(B) Conventional technology Conventionally, in backhoes, it is known that an assist bar is provided to cover the upper and lateral sides of the operation column and to support the body when the operator sways forward. is there.

For example, it is like the technique described in Japanese Utility Model Publication No. 1-75174.

(C) Problems to be solved by the invention However, in the conventional technique, since the upper end of the assist bar is linearly configured, when the main boom of the backhoe is fully rotated rearward, the assist bar collides with the assist bar. There was a problem that the tilt angle could not be made large after the main boom.

If you try to secure a sufficient tilt angle after the main boom,
It was necessary to secure a wide space between the assist bar and the main boom.

In the present invention, in order to eliminate such a defect, the assist bar is projected from the operation column.
A recess is formed in the center of the upper portion of the assist bar, and a rear-tilted main boom is positioned in the recess.

With this configuration, the rear tilt angle of the main boom can be increased even though the distance between the main boom and the assist bar is narrow.

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

From the operation column 6 located in front of the backhoe seat S,
In the configuration in which the assist bar 1 protruding sideways and upward is provided, a recess 1a is formed in the center of the assist bar 1.

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

FIG. 1 is an overall side view of the backhoe of the present invention, FIG. 2 is the same front view, FIG. 3 is the same plan view, FIG. 4 is an enlarged rear view of the assist bar 1, and FIG. 6 is a perspective view of the hydraulic hose bundling device, FIG. 7 is a side view of the entire backhoe showing another embodiment of the seat S, and FIG. 8 is a seat 5
FIG. 9 is a perspective view of an embodiment in which the seat is elongated, FIG. 9 is a perspective view of an embodiment in which the seat 5 can be adjusted back and forth, and FIG. 10 is a backrest 2
Fig. 11 is a perspective view showing the front-rear adjustment device of Fig. 11, Fig. 11 is a cross-sectional view of the front-rear slide unit, Fig. 12 is a perspective view of another embodiment of the front-rear adjustment device of the backrest 2, and Figs. 13 and 14 are front-rear slides. It is sectional drawing which shows a part.

The overall configuration of the backhoe will be described with reference to FIGS. 1 and 2.

The crawler type traveling device 15 travels, the soil discharging plate 21 is arranged at the rear part of the crawler type traveling device 15, and the main boom 16, the bucket arm 17 and the bucket 13 at the front part are capable of scooping and rotating earth and sand. It is located in.

The main boom 16 is rotated by the boom cylinder 20, the bucket arm 17 is moved by the arm cylinder 19, and the bucket 13 is rotated by the bucket cylinder 18.

A body frame F is rotatably arranged on a crawler type traveling device 15 via a swivel bearing B, and an engine room A and an operation column 6 are arranged on the body frame F.
The lower end of the main boom 16 is pivotally supported at the front end so as to be vertically rotatable.

The main boom 16 is also pivotally supported to the left and right, and the swing cylinder 14 is arranged below the machine body frame F.

A seat S whose front and rear positions are adjustable is arranged above the engine room A, and an operation column 6 is arranged in front of the seat S.

A travel lever 11 is arranged at the center of the upper end of the operation column 6, and work levers 12 and 10 are provided at the left and right positions of the travel lever 11.
Are arranged.

Further, an earth plate lever 30 is arranged on the right side surface of the operation column 6, and an accelerator lever 31 is arranged on the left side surface.

The assist bar 1 is formed in an M shape as shown in FIGS. 4 and 5, and the attachment portions 1b, 1b at the left and right ends are fixed to the left and right side surfaces of the operation column 6.

Then, all the levers of the accelerator lever 31, the earth discharging plate lever 31, the work levers 12 and 10, and the traveling lever 11 are protected in the frame surrounded by the assist bar 1.

The center portion of the assist bar 1 is a recessed portion 1a, which can be fitted into this portion when the main boom 16 is tilted rearward as shown in FIG.

However, the accelerator lever 31 and the exhaust soil plate lever 30 are configured so as not to interfere with the portion that has entered the inside by the recess 1a.

Further, in the backhoe, a large number of hydraulic hoses are extended from the portion of the control valve device arranged on the lower surface of the machine body frame F toward the main boom 16 and the bucket arm 17.

These hydraulic hoses are bundled together on the right and left sides of the main boom 16, and when the main boom 16 swings left and right by the swing cylinder 14, the bundled hydraulic hoses also swing left and right. However, there is a problem that the operator sitting in the seat S obstructs the field of view to see the scooped-up portion of the bucket 13.

In this configuration, the hydraulic hoses that are bundled on the left and right of the main boom 16 and dangled in this way do not block the operator's view,
The hydraulic hose extending from the right side of 16 is turned to the left side of the main boom 16, and conversely, the hydraulic hose extending from the left side of the main boom 16 is turned to the right side of the main boom 16 and is crossed.

A hose bundling device for bundling the hydraulic pipes is constructed as shown in FIG. 6 at the portion where the hydraulic hoses cross.

The hose bundling device is supported on the rear surface of the main boom 16 in FIG. 3, and a hydraulic hose is loosely inserted in the hose bundling device.

In the hose bundling device, the hose inserts 7 and 8 are crossed in a cross shape, and both hose inserts 7 and 8 are freely rotatable, and the hose inserts 7 and 8 are inserted into the insertion holes 7a and 8a. The hydraulic hose is inserted so that it slides freely.

Therefore, when the hydraulic hose is going to move to the left or right when the main boom 16 is rotated to the left or right, the insertion hole 7a
Can move in 8a and hose insert 7.8
As a result, the hydraulic hoses can be freely bundled so as not to move to a position away from the main boom 16.

The hose inserts 7 and 8 are attached to the main boom 16 by the pivot pin 9.
The hose inserts 7 and 8 are pivotally supported on the rear surface, and both of them are rotatable.

Since the hose inserts 7 and 8 are provided and the hydraulic hoses are crossed as described above, the hydraulic hose is less likely to protrude to the side of the main boom 16 and the operator's view is not obstructed.

Further, since the hydraulic hoses are not fixed to the main boom 16 tightly but are loosely bundled by the hose inserts 7 and 8, the deformation of each hydraulic hose is not restricted during rotation, so that the hose can freely move. is there.

Next, another configuration of the seat adjusting mechanism will be described with reference to FIGS. 7 to 14.

In this configuration, the seat 5 and the backrest 2 are separately configured, and the seat 5 is configured to be long above the engine compartment A as shown in FIG. 8 so that it does not have to be adjusted. As shown in FIG. 9, the other structure of the seat 5 is such that the seat 5 can slide back and forth on the slide rail 23. 22 is a sliding lock lever.

At the position of the rear surface of the engine room A where the seat 5 is arranged,
A backrest insertion hole 24 for inserting the support portion of the backrest 2 is formed.

In the configuration of FIGS. 10 and 11, the plate-shaped slide portion 3 is inserted into the backrest insertion hole 24, and the plate-shaped slide portion 3 is inserted.
In the structure shown in FIG. 14, the rod-shaped slide portion 4 is inserted.

In the case of FIGS. 10 and 11, the plate-like slide portion 3 is slidable back and forth on the slide rail cylinder 27, and the adjusted position is fixed by the fixing bolt 25.

In the case of the configuration shown in FIG. 13, the rod-shaped slide portion 4 is slidable inside the slide fitting cylinder 28, and the fixing bolt 25
It is fixed by.

In the case of the configuration shown in FIG. 14, the rod-shaped slide portion 4 is inserted between the holding plate 26 and the upper surface plate of the engine room A, and it can be slid back and forth, and can be fixed by the fixing bolt 25.

With such a configuration, conventionally, the space for the support pillar in the portion supporting the backrest 2 from the seat 5 is no longer necessary, and thus the space can be effectively utilized.

Since the backrest 2 can be freely adjusted with respect to the seat 5, it is possible to adjust the backrest 2 according to the physique apart from the case where the seat S is slid back and forth.

Further, as shown in FIG. 7, when the engine compartment A is rotated to be opened, the opening angle can be widened.

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

First, the assist bar 1 is raised so that it does not interfere with the operation of the accelerator lever 31 and the earth plate lever 30, but there is no interference when the main boom 16 rotates rearward. The assist bar 1 can be configured, and the gap between the assist bar 1 and the main boom 16 can be narrowed.

Secondly, since the accelerator lever 31 and the earth plate lever 30 can be pivoted largely forward, the accelerator lever 31 and the earth plate lever 30 are directed toward the feet of the operator.
Since there is no protrusion, the living space for the operator sitting in the seat S can be widened.

Thirdly, since the main boom 16 has a large inclination angle to the rear, the maximum dump height can be obtained, and the maximum dump height is accommodated in the fuselage frame to achieve the minimum turning radius. Has become possible.

[Brief description of drawings]

FIG. 1 is an overall side view of the backhoe of the present invention, FIG. 2 is the same front view, FIG. 3 is the same plan view, FIG. 4 is an enlarged rear view of the assist bar 1, and FIG. 6 is a perspective view of the hydraulic hose bundling device, FIG. 7 is a side view of the entire backhoe showing another embodiment of the seat S, and FIG. 8 is a seat 5
FIG. 9 is a perspective view of an embodiment in which the seat is elongated, FIG. 9 is a perspective view of an embodiment in which the seat 5 can be adjusted back and forth, and FIG. 10 is a backrest 2
Fig. 11 is a perspective view showing the front-rear adjustment device of Fig. 11, Fig. 11 is a cross-sectional view of the front-rear slide unit, Fig. 12 is a perspective view of another embodiment of the front-rear adjustment device of the backrest 2, and Figs. 13 and 14 are front-rear slides. It is sectional drawing which shows a part. 1 ... Assist bar 1a ... Recess 6 ... Operation column 16 ... Main boom 30 ... Excavator lever 31 ... Accelerator lever

Claims (1)

[Scope of utility model registration request] 1. A structure in which an assist bar 1 which projects laterally and upwardly from an operation column 6 arranged in front of a seat S of a backhoe is provided, and a recess 1a is formed in the center of the assist bar 1.
An operating device for a backhoe, characterized in that