JPH11247216A - Working machine for construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid a collision with a falling stone, an obstruction, or the like so as to prevent oil leak by providing working machine piping disposed outside of a working machine and inside a projection line in both vertical and lateral directions. SOLUTION: A working machine comprising a boom 1 and an arm 3, and a bucket 5 are connected in this order from a vehicle body 53. The boom 1, arm 3 and bucket 5 are driven by a hydraulic actuator. The boom 1 and arm 3 have triangular cross section. Working machine piping 40 is disposed inside a projection line A of the boom 1 and arm 3 of triangular cross section, and this piping 40 is disposed facing the driver's seat side. The boom 1 is formed by press-molding one steel plate and welding at one place so as to be formed in hollow triangular shape in appearance. Since the working machine piping is outside of the working machine and inside a control line in both vertical and lateral direction, damage caused by falling stones or the like can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a working machine such as a boom and an arm of a construction machine such as a hydraulic shovel, and more particularly to a construction machine having an improved shape of a working machine and an improved arrangement of piping of the working machine. Work equipment.

[0002]

2. Description of the Related Art The shape and piping of a working machine such as a boom and an arm of a conventional construction machine such as a hydraulic excavator will be described with reference to FIGS. The hydraulic excavator 50 shown in FIG. 26 has an upper revolving structure (hereinafter, referred to as a vehicle body) 53 above a lower traveling structure 51 via a revolving circle 52.
Is installed. The upper swing body 53 can be turned by a turning motor (not shown). A work machine 60 is mounted on the vehicle body 53. The work machine 60 sequentially connects the boom 61, the arm 63, and the bucket 65, and is driven by the hydraulic cylinders 62, 64, 66. 19 will be described in detail with reference to FIG. As shown in FIG. 20, a working machine pipe 70 (hereinafter, referred to as a pipe 70) such as a rubber hose or a steel pipe is provided above the boom 61 and the arm 63. This boom 61, arm 6
The working machines such as 3 generally have a rectangular box-shaped structure having four sides welded as shown in FIGS. Therefore, as shown in FIG. 28, the piping 70 provided on the boom 61 (and the arm 63 as well)
It is arranged above 1a or, as shown in FIG. 29, arranged on the side of the side plates 61b and 61c.

[0003] For example, according to Japanese Utility Model Laid-Open No. 6-60647, as a piping structure of a working machine, a working device including a box-shaped hollow welded component member such as a boom and an arm that swings by operation of a hydraulic cylinder is mounted. In a construction machine, a welded structure of a working device for a construction machine, comprising a rubber hose that absorbs deflection in a welded component, or a pipe connected to a pipe joint device that absorbs deflection,
Is described.

[0004]

However, FIG.
The boom and the arm of the construction machine such as the hydraulic shovel described with reference to FIG. 29 have a rectangular box-shaped structure. For this reason, as shown in FIGS. 28 and 29, since the pipe projects outside, there is a problem that the pipe collides with a falling rock or an obstacle at a work site and is broken, and oil leaks from the pipe. 28 and 29
Is protected by a cover, but there is a problem that the appearance quality and the visibility of the driver are deteriorated. As a method for solving the above-mentioned problems, according to Japanese Utility Model Application Laid-Open No. 6-60647, there is provided a technique in which a welded rubber hose or a pipe connected to a pipe joint device for absorbing the bending is used. In this case, the pipe can avoid collision with falling rocks and obstacles, but it is difficult to manufacture booms and arms, etc., and cost is high, and strength is reduced by providing holes in the booms and arms. Therefore, it is necessary to increase the thickness of the steel sheet, making it difficult to manufacture the steel plate, increasing the cost, and deteriorating the pipe assemblability.

The present invention pays attention to the above-mentioned conventional problems, and arranges a working machine pipe inside a projection line in both the vertical and horizontal directions of the working machine such as a boom and an arm to prevent falling of rocks and obstacles. An object of the present invention is to provide a working machine of a construction machine that avoids collisions, prevents oil leakage, facilitates the manufacture of a working machine, facilitates assembly of piping, and improves appearance quality.

[0006]

In order to achieve the above object, a first embodiment of a construction machine working machine according to the present invention is provided.
The present invention relates to a working machine of a construction machine including a working machine including a boom and an arm sequentially connected to a vehicle body, wherein the working machine is disposed outside the working machine and inside the projection line in both the vertical and horizontal directions. It is configured to include a pipe. According to the above configuration, since the working machine piping is in the projection line both in the vertical direction and the left and right direction outside the working machine, it is less likely to be damaged by falling rocks or the like. Further, the working machine piping is less likely to crack or break due to contact with an obstacle or the like at the work site when the construction machine is operated while rotating, thereby improving the durability. Further, since the working machine piping is in the projection line both in the vertical direction and the left and right direction outside the working machine, the working machine piping from the top plate or the side plate of the conventional working machine shown in FIGS. Does not protrude, so that the appearance quality is improved.

According to a second aspect of the present invention, in the configuration of the first aspect, the working machine has a triangular cross section. According to the above configuration, the working machine is formed by pressing a single steel plate into a triangular cross-section by a press and welding it at one location, so that it is easy to manufacture and the weight can be reduced, so that the cost is low. Becomes Further, by arranging the working machine piping within the projection line of the working machine having a triangular cross section, the working machine piping is less likely to be damaged by falling rocks or colliding with obstacles or the like. Further, the working machine of the present invention is configured to have a triangular cross section so that
No. 47, the strength is reduced by providing holes in the boom and the arm and arranging the working machine piping, the steel plate needs to be thickened, the manufacturing is difficult, the cost is high, and the piping assemblability is deteriorated. The problem is solved.

According to a third aspect of the present invention, in the configuration of the first aspect, the working machine piping is disposed on a side of the working machine in plan view and at least facing a driver's seat side. It is. According to the above configuration, in addition to the operation and effect of the first invention, by arranging the working machine piping on the side of the working machine facing the driver's seat side, the operator can work while paying attention to the working machine piping. Thereby, collision with falling rocks and obstacles can be avoided.

According to a fourth aspect of the present invention, in the configuration of the first aspect, the working machine pipe is provided in a recess formed in a side plate of the working machine, and the working machine pipe is arranged in the up-down direction and the left and right directions of the working machine. It is configured to include a working machine pipe disposed inside the projection line in both directions. According to the above configuration, since the working machine piping is arranged in the recess formed in the side plate of the working machine,
The working machine piping is less likely to be damaged by falling rocks or colliding with obstacles, etc., and the durability is improved.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A construction machine working machine according to the present invention will be described below with reference to FIGS. First,
A work machine including a boom 1 and an arm 3 and a bucket 5 are sequentially connected from the vehicle body 53 shown in FIG. The boom 1, the arm 3, and the bucket 5 are driven by respective hydraulic actuators. FIG. 1 shows a side view of the working machine as viewed from the driver's seat side. XX sectional view shown in FIG. 1 and YY
A sectional view will be described with reference to FIGS. 2 to 7 in which the boom and the arm have the same shape. As shown in FIG. 2, the boom 1 and the arm 3 have a triangular cross section. Projection line 1A of this boom 1 and arm 3 having a triangular cross section
A work machine pipe 40 (hereinafter, referred to as a pipe 40) is provided inside the work piece. This pipe 40 is provided facing the driver's seat side. The pipes 40 and 40 shown in FIG. 3 are disposed inside the projection lines 1A on both the left and right sides of the boom 1 and the arm 3 having a triangular cross section. Pipes 40, 40 shown in FIGS.
Is a projection line 1A on both the left and right sides of the chevron 1
It is arranged inside. As shown in FIG.
Are in the recesses formed in the side plates of the boom 1 and the arm 3
And it is arrange | positioned inside the projection line 1A. As shown in FIG.
The pipes 40, 40 are disposed inside the projection line 1A of the hexagonal boom 1 and the arm 3.

Next, the shape of the boom 1 and the arrangement of the piping 40 will be described with reference to FIG. 8 and FIG. The boom 1 is formed by pressing a single steel plate by pressing and welding at one place, and is hollow and has a triangular appearance, and the apexes of the triangle are connected at predetermined radii to R portions shown in FIG. The pipe 40 is inside the projection line 1A and
It is arranged facing the driver's seat side. Although the shape of the arm will be described later, the shape of the arm is substantially the same as that of the boom, or the shape of the arm is different depending on the specifications of small to large models. The cross section of each part shown in FIG.
As shown in FIGS. 17 to 17, the boom 1 and the arm 3 have a triangular cross-section, and are formed so that the cross-sectional area gradually decreases toward the distal end. Boom 1 and arm 3
Are designed to increase the rigidity by increasing the cross-sectional area around the bottom bracket portions of the hydraulic actuators 4 and 6 which receive a large reaction force during work.

FIG. 1 shows another example of a working machine of a construction machine.
This will be described with reference to FIGS. The perspective view of FIG. 18, FIG.
As shown in FIG. 19 and a detailed view of a portion P in FIG. 19, the boom 10 is provided with a pipe 40 in a recess 10x formed in a side plate as shown in a boom partially broken portion 10a, It is designed to protect. When the cover 11 is attached to the boom 10, the boom 10 has a substantially triangular shape. As shown in FIG. 20, the pipe 40 is fixed by a clamp 40a. Although only the boom 10 has been described, the arm may have the same structure, and a description thereof will be omitted. FIG. 21 shows another two of the booms 10 shown in FIG.
A boom 10A, which is a modification of the example, also has a pipe 40 disposed in a recess formed in the side plate, and is protected by a cover 11A.

FIG. 2 shows three other examples of the working machine of the construction machine.
This will be described with reference to FIGS. As shown in the perspective view of FIG.
The boom 10B is formed in a triangular cross section, as shown in the boom partially broken portion 10b. As shown in FIG. 23 and FIG. 24 of the detailed view of the Q section in FIG. 23, the pipes 40 are arranged on both side surfaces of the boom 10B and are protected by covers 11B. FIG. 25 shows four other examples of the boom 10C of the working machine of the construction machine. This boom 10C
A concave portion is provided on the bottom side, and a pipe 40 is provided in the concave portion and is protected by a cover 10d.

According to the construction machine working machine of the present invention described above, since the working machine piping is in the projection line both vertically and horizontally outside the working machine, it is not damaged by falling rocks or the like. Less. Further, the working machine piping is less likely to crack or break due to contact with an obstacle or the like at the work site when the construction machine is operated while rotating, thereby improving the durability. Further, since the working machine piping is in the projection line both in the vertical direction and the left and right direction outside the working machine, the working machine piping from the top plate or the side plate of the conventional working machine shown in FIGS. Does not protrude, so that the appearance quality is improved.

Furthermore, the working machine can be formed easily by pressing a single steel sheet into a triangular cross-section by a press and welding at one place, so that it is easy to manufacture and the weight can be reduced, so that the cost is low. Becomes Further, by arranging the working machine piping within the projection line of the working machine having a triangular cross section, the working machine piping is less likely to be damaged by falling rocks or colliding with obstacles or the like. Further, the working machine of the present invention is configured to have a triangular cross section so that
No. 47, the strength is reduced by providing holes in the booms and arms and arranging the working machine piping, the steel plate needs to be thickened, making it difficult to manufacture, and increasing the cost, and worsening the piping assemblability. The problem is solved.

Furthermore, by arranging the working machine piping on the side of the working machine facing the driver's seat side, the operator can work while paying attention to the working machine piping to prevent collision with falling rocks and obstacles. Can be avoided.

Further, since the working machine piping is disposed in the recess formed in the side plate of the working machine,
Alternatively, damage due to collision with an obstacle or the like is reduced, and durability is improved.

[Brief description of the drawings]

FIG. 1 is a side view of a working machine of a construction machine according to the present invention.

FIG. 2 is a diagram for explaining a boom and an arm having a triangular cross-section based on the XX cross-sectional view and the YY cross-sectional view of FIG. 1;

FIG. 3 is a diagram for explaining a boom and an arm having a triangular cross section based on the XX cross-sectional view and the YY cross-sectional view of FIG. 1;

FIG. 4 is a view for explaining a mountain-shaped boom and an arm with reference to the XX sectional view and the YY sectional view of FIG. 1;

FIG. 5 is a view for explaining a mountain-shaped boom and an arm based on the XX sectional view and the YY sectional view of FIG. 1;

FIG. 6 is a view for explaining a boom and an arm provided with a concave portion in a side plate according to the XX sectional view and the YY sectional view of FIG. 1;

FIG. 7 is a diagram illustrating a hexagonal boom and an arm with reference to the XX cross-sectional view and the YY cross-sectional view of FIG. 1;

FIG. 8 is a side view of the boom.

FIG. 9 is a view for explaining the arrangement of pipes in the sectional view taken along the line CC in FIG. 8;

FIG. 10 is a view showing the position of a cross section of the boom and the arm.

FIG. 11 is a sectional view taken along the line AA of FIG. 10;

FIG. 12 is a sectional view taken along the line BB of FIG. 10;

FIG. 13 is a sectional view taken along the line CC of FIG. 10;

FIG. 14 is a sectional view taken along the line DD in FIG. 10;

FIG. 15 is a sectional view taken along the line EE of FIG. 10;

FIG. 16 is a sectional view taken along line FF of FIG. 10;

FIG. 17 is a sectional view taken along line GG of FIG. 10;

FIG. 18 is a perspective view showing another example of the boom.

FIG. 19 is a view illustrating a state in which piping is arranged on the boom of FIG. 18 and a cover is attached.

FIG. 20 is a detailed view of a portion P in FIG. 19;

FIG. 21 is a diagram showing another two examples of the boom.

FIG. 22 is a perspective view showing another three examples of the boom.

FIG. 23 is a view illustrating a state in which piping is arranged on the boom of FIG. 22 and a cover is attached.

FIG. 24 is a detailed view of a portion Q in FIG. 23;

FIG. 25 is a diagram showing another four examples of the boom.

FIG. 26 is a side view of the excavator.

FIG. 27 is a diagram illustrating a conventional working machine.

FIG. 28 shows the shape of a conventional boom and the mounting position of a pipe.
It is a figure explaining an example.

FIG. 29 shows a conventional boom shape and two positions of piping installation positions.
It is a figure explaining an example.

[Explanation of symbols]

1,10,10A, 10B, 10C ... boom, 10x ...
Recess, 1A ... projection line, 3 ... arm, 10d, 11, 11
A, 11B ... cover, 40 ... piping, 53 ... body.

Claims (4)

[Claims] 1. A work machine for a construction machine provided with a work machine comprising a boom and an arm sequentially connected to a vehicle body, wherein a projection line (1A) is provided outside the work machine (1, 3) in both the vertical and horizontal directions. A construction machine working machine, comprising: a working machine pipe (40) disposed inside of (). 2. A construction machine working machine according to claim 1, wherein said working machine (1, 3) has a triangular cross section. 3. The construction machine working machine according to claim 1, wherein the working machine pipe (40) faces a side of the working machine (1, 3) in plan view and at least faces a driver's seat side. A construction machine working machine, characterized in that the working machine is arranged in a vertical direction. 4. A work machine for a construction machine according to claim 1, wherein said work machine pipe (40) has a work machine pipe (40) inserted into a recess formed in a side plate of the work machine (1, 3). Work of a construction machine characterized by comprising a work machine pipe (40) arranged and disposed inside the projection line (1A) in both the vertical and horizontal directions of the work machine (1, 3) Machine.