JP2534315Y2 - All-turn type backhoe - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure near a control section of a swivel base in an all-slewing backhoe.

[0002]

2. Description of the Related Art In particular, many small-sized all-turn type backhoes have a steering section disposed at the center of the turntable on the left and right sides, and a backhoe device (boom base) is connected to the front end of the turntable. In recent years, the control section and the backhoe device (base of the boom) are arranged side by side on the swivel base, so that the boom is substantially upright and the arm is operated to the front side, thereby turning the swivel base in a small range. An all-turn type backhoe configured to cause the rotation has been proposed.

[0003]

As described above, when the control section and the backhoe device (base of the boom) are arranged side by side on the swivel base, when the boom is substantially upright and the arm is operated to the front side, Since the bucket at the tip of the arm is located on the upper side of the control unit, soil spilled from the bucket may enter the control unit side.

[0004] In this case, it is conceivable that the control section may be covered in a substantially closed room shape by a cabin. In particular, in the case of a small all-turn type backhoe, the space of the turntable is small. This cabin is also small, giving a sense of oppression to the driver in the cabin. In addition, in the case of a small all-turn type backhoe that often performs work in a narrow city area, if a cabin is provided on the turntable, the field of view particularly near the ground near the all-turn type backhoe itself becomes narrow. The present invention relates to an all-turn type backhoe in which a steering section and a backhoe device (base of a boom) are arranged side by side on a swivel base, while soil spilled from a bucket is secured while ensuring comfort and visibility at the steering section. Its purpose is to prevent it from getting into your side.

[0005]

The feature of the present invention resides in the following configuration of the above all-turn type backhoe. In other words, the control section and the backhoe device are arranged side by side on the swivel base, and a partition section that separates the control section and the backhoe apparatus is provided. And a middle portion provided between the vertical wall and the roof so as to be offset toward the control section side from the vertical wall and lower than the roof and configured as a backhoe. A see-through portion that can see through the apparatus side is provided on the vertical wall of the partition portion.

[0006]

According to the present invention, since the control section and the backhoe device are separated by the partition section, when the boom is substantially upright and the arm is operated toward the front side, the control section is located on the upper side of the control section. Even if soil spills from the bucket located,
This soil will not be blocked by the partition and will not enter the control section.

[II] Even if such a partitioning section is provided, the front and rear of the control section and the lateral side of the control section opposite to the backhoe apparatus are open, so that the driver of the control section feels oppression. I don't have to. Then, the field of view during the operation (particularly, the field near the ground near the all-turn type backhoe itself) is not obstructed for the driver of the control unit. In addition, since the see-through portion is formed on the vertical wall of the partition portion, the field of view on the side of the backhoe device side from the control portion is secured, and the state of the backhoe device and the like can be easily viewed from the control portion.

[III] When the control unit and the backhoe device (base of the boom) are arranged side by side on the swivel base, when the boom is substantially upright and the arm is operated toward the front side, the bucket at the tip of the arm is moved to the control unit. Will be located on the upper side. In this case, the intermediate portion closest to the bucket in the partition portion is deviated to the control portion side opposite to the backhoe device (bucket) and deviated below the bucket. Even if the bucket swings right and left in the vicinity, the bucket does not come into contact with the intermediate portion (partition portion).

[0009]

[Effect of the Invention] As described above, in the all-turn type backhoe in which the control unit and the backhoe device are arranged side by side on the turntable, the soil spilled from the bucket while not giving a feeling of oppression to the driver of the control unit. Could be prevented from entering the control unit side, and comfort in the control unit could be improved. The front and rear of the control unit, the side of the control unit opposite to the backhoe device is open, and the backhoe device side can be seen through the see-through portion of the vertical wall of the partition unit. Since visibility is secured, workability is also sufficient. Further, even if the bucket is positioned on the upper side of the control unit, the bucket does not contact the middle part of the partition part, so that the bucket is prevented from being damaged due to the contact with the middle part of the partition part. be able to.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 5 shows the all-turn type backhoe according to the present invention. This all-turn type backhoe is a crawler traveling device 1
A swivel 3 capable of fully turning around a vertical axis is mounted on a traveling machine base 2 having a vertical axis, and a steering unit 4 and a backhoe 5 are arranged side by side on the swivel 3. The driving unit 6 is mounted.

The backhoe device 5 includes a boom 8 connected to a bracket 7 erected from the swivel table 3 so as to be able to swing up and down around a horizontal axis near the center of rotation, and an arm pivotally connected to a tip end of the boom 8. 9, a bucket 10 pivotally connected to the distal end of the arm 9;
The bucket 10 is swingably driven by a boom cylinder C1, an arm cylinder C2, and a bucket cylinder C3. As shown in FIGS. 5 and 6, the backhoe device 5 is configured so that the bucket 10 at the tip can be folded and stored in a state in which the bucket 10 enters the turning center side in plan view from the outer peripheral portion of the turning table 3.

That is, as shown in FIGS. 5 and 6, the boom 8 is divided into a base end portion 8a, an intermediate portion 8b, and a distal end portion 8c, and the intermediate portion 8b and the distal end portion 8c are vertically extended substantially at right angles to the extending direction. Are connected so as to be relatively swingable around the orientation axes P1 and P2,
The connecting portion of the intermediate portion 8b forms a parallel quadruple link mechanism. Thus, by swinging the intermediate portion 8b by the offset cylinder C4 while maintaining the base portion 8a and the tip portion 8c in a parallel posture, the tip portion 8c and the bucket 10 are offset left and right as shown in FIG. It is configured to be movable. Then, by offsetting the bucket 10 to the opposite side of the control unit 4 and folding and swinging the boom 8 and the arm 9, the backhoe device 5 can be stored inside the swivel 3 as described above. Make up.

As described above, the bucket 10 is rotated
, The soil loaded at the time of entry may fall from the bucket 10 to the connecting portion (base portion) of the boom 8. In this case, as shown in FIGS. 1, 5, and 6, a downflow plate 11 wider than the bucket 10 is provided at a portion of the boom 8 opposite to the control unit 4, and a lower end of the downflow plate 11 is provided with an airframe. A rubber droop 13 that can bend in contact with the side hood 12 is provided.

As shown in FIGS. 1, 5 and 6, between the backhoe device 5 and the control unit 4, a protective partition 14 for partitioning the backhoe device 5 and the control unit 4 is provided upright. This partition part 14 is formed by a vertical wall 14 that is installed substantially vertically on the swivel 3.
a, a roof 14c and a vertical wall 14 arranged above the control unit 4
The backhoe device 5 is provided with an intermediate portion 14b which is displaced toward the control section 4 side from a and lower than the roof 14c and provided between the vertical wall 14a and the roof 14c.
A see-through window 15 (corresponding to a see-through portion) that can see through the side is provided on the vertical wall 14 a of the partition portion 14.

As shown in FIGS. 1 and 2, a protective cover 16 for receiving dirt falling from the stored bucket 10 and flowing down diagonally downward is provided outside the boom 8 with respect to the boom cylinder C1. This prevents soil from falling on the cylinder rod 17 of the boom cylinder C1. A protective cover 16 is bolted to a boss 17a for connection with the boom 8 at the tip of the cylinder rod 17, and interlocks with the expansion and contraction of the boom cylinder C1 as shown in FIGS. It is configured to be.

A bent portion 16a parallel to the vertical wall 14a of the partition portion 14 is provided at a position below the protection cover 16 on the operation portion 4 side.
Is formed to prevent the spilled soil from directly hitting the see-through window 15. On the cylinder body 18 side of the boom cylinder C1, a guide member 19 which is connected to the bent portion 16a when extended to perform a preventive action is provided in a state where the protection cover 16 is allowed to slide.

As shown in FIGS. 1 and 2, the protective cover 1
An elastic resin sheet 20 made of a rubber material or the like which scrapes off the soil attached to the see-through window 15 due to the swinging operation of the boom 8 is provided on the edge of the guide member 19 on the control section 4 side. As described above, the soil spilled from the bucket 10 falls and intrudes from between the backhoe device 5 and the vertical wall 14a of the partition portion 14, and accumulates on the connecting portion (base portion) of the boom 8 and the hydraulic piping portion to cause damage. The configuration is such that the see-through window 15 is cleaned while reducing such situations.

Incidentally, in the claims of the utility model registration, reference numerals are written for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.

[Brief description of the drawings]

FIG. 1 is a front view of a boom cylinder protection cover, a partition section, and a vicinity of a control section.

FIG. 2 is a perspective view showing the vicinity of a protection cover of the boom cylinder.

FIG. 3 is a side view showing the vicinity of a protection cover of a boom cylinder in a state where the boom is raised.

FIG. 4 is a side view showing the vicinity of a protection cover of a boom cylinder in a state where the boom is lowered.

FIG. 5 is an overall side view of the all-turn type backhoe.

FIG. 6 is an overall plan view of an all-turn type backhoe.

[Explanation of symbols]

 REFERENCE SIGNS LIST 3 swivel base 4 control section 5 backhoe device 14 partition section 14a vertical wall of partition section 14b intermediate section of partition section 14c roof of partition section 15 see-through section of vertical wall

Claims (1)

(57) [Scope of request for utility model registration] A steering section (4) and a backhoe device (5) are arranged side by side on a swivel (3) to partition the steering section (4) and the backhoe device (5).
4), and a vertical wall (14a) standing substantially vertically to the swivel (3).
And a roof (14) disposed above the control section (4).
c), and deviates toward the control section (4) side from the vertical wall (14a) and deviates downward from the roof (14c) to form the vertical wall (14a) and the roof (14c). And an intermediate portion (14b) provided over the backhoe device (5) to constitute the partition portion (14).
(5) An all-turning backhoe provided on the vertical wall (14a) of the partition (14).