JP2001311181A - Structure of swing post section in working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate manufacture of the joint part of a swing post and a machine body and reduce the number of parts and further, increase the strength in a working machine provided with a swing post swingably attached to the boss of the machine body through a shaft member and to which the working device is connected and a flexible pipe arranged between the machine body and the working device. SOLUTION: The boss (8) of a machine body (6) is put between the upper boss (2a) and lower boss (2b) formed in the swing post (2) and a shaft member (11) is inserted therein and swingably connected. The pipe (14) is led to pass through below the boss (2b) and made to pass through the machine body (6) and the swing post (2) respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a swing post of a working machine, and more particularly to a swing post of a swing post which is swingably attached to a body of a working machine such as a hydraulic shovel and to which a working device is connected. Regarding the structure of the part.

[0002]

2. Description of the Related Art Referring to FIGS. 5 and 6, a typical work machine, for example, a hydraulic shovel is mounted on a body 50 so as to be swingable about an axis 51 extending substantially vertically. A swing post 52 is provided, and a working device 54 is connected to the swing post 52.

The working device 54 includes an arm member, a working tool such as a bucket, a hydraulic cylinder for driving the arm member and the working tool, and the like. The working device is described in detail in an embodiment of the present invention. A hydraulic hose 56 which is a plurality of flexible pipes corresponding to the number of actuators such as a hydraulic cylinder provided in the working device 54 is disposed between the working device 54 and the body 50 via a swing post 52. I have.

A swing post 52 is attached to the body 50 at two locations, an upper connection portion 58 and a lower connection portion 60, and a hydraulic hose 56 is disposed so as to pass between the upper connection portion 58 and the lower connection portion 60. ing. The swing post 52 includes a bracket 53 formed on the swing post 52 and an airframe main body 50.
Is swingable by a swinging cylinder 62 which is a telescopic actuator attached to a bracket (not shown) formed on the front side.

[0005] The swing post 52 is integrally formed by casting, and has an upper connecting portion 58 and a lower connecting portion 6 of the body 50.
The swing post mounting portion including the "0" is formed integrally by welding various steel members to each other. The upper connecting portion 58 is formed by inserting a pin 62 on the axis 51 with a boss 50a projecting from the body 50 sandwiched between a pair of bosses 52a and 52b projecting horizontally from the swing post 52. The lower connecting portion 60 is formed by a boss 52c projecting from the swing post 52 being sandwiched between a pair of bosses 50b and 50c projecting horizontally from the body 50, and a pin 64 being inserted through the axis 51. I have.

[0006]

The structure of the swing post portion of the conventional working machine of the above-described type has the following problems to be solved.

(1) Manufacturing: upper connecting portion 58 and lower connecting portion 6
0 denotes three bosses 50a, 50b,
50c is the three bosses 52 from the swing post 52.
Since a, 52b and 52c are projected in the horizontal direction and connected by pins 62 and 64, the six bosses are formed in parallel by casting or by welding plate members in manufacturing. Further, it is not easy to machine the respective bearing holes into which the pins 62 and 64 are inserted on the same axis 51. For this purpose, special means for manufacturing are prepared, such as various welding jigs, processing jigs, and processing machines. Also, the number of components is large. Therefore, there is a problem that manufacturing cost is increased.

(2) Strength: upper connecting portion 58 and lower connecting portion 6
The above-mentioned six bosses constituting the swing post 5
2 and the boss portion protrude from the body 50 in a comb shape. Therefore, there is a problem that it is difficult to secure the strength of the connecting portion between the body 50 and the swing post 52.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and a technical problem thereof is that a body portion of a working machine and a connecting portion of a swing post which is swingably attached to the body body and to which a working device is connected are connected. It is an object of the present invention to provide a structure of a swing post portion of a working machine, which can facilitate manufacture, reduce the number of parts, and improve strength.

[0010]

According to the first aspect of the present invention, a working device is connected to a boss of a body of a vehicle body through a shaft member disposed substantially vertically so as to be swingable. In a working machine including a swing post and a flexible pipe provided between the machine body and the working device via the swing post, the shaft member penetrates the boss, and the swing post is An upper boss portion and a lower boss portion, which are positioned vertically and through which the shaft member is inserted, wherein the flexible pipe passes under the lower boss portion and passes through each of the body body and the swing post. It is a structure of a swing post part of a working machine which is a feature.

Then, the connecting portion is made into one, and the pipe is made to pass below the connecting portion, so that the boss portion of the body body extends in the direction of the swing axis of the closed section, and this is formed by the upper and lower boss portions of the swing post. By sandwiching, the strength of the connecting portion is ensured, the structure is simplified, and the manufacturing is facilitated.

According to a second aspect of the present invention, in the structure of the swing post portion according to the first aspect, a lower portion of the swing post and / or a lower boss portion provided on the body body below the lower boss portion. Is provided with a flange portion that forms a space through which the pipe passes.

By passing the pipe between the lower boss and the flange, damage to the pipe due to contact with an obstacle or the like is prevented.

According to a third aspect of the present invention, in the structure of the swing post portion according to the second aspect, the flange portion of the swing post is integrated with a mounting portion of a telescopic actuator that swings the swing post. ing.

Further, the swing post mounting portion of the swing post is reinforced by the flange portion.

According to a fourth aspect of the present invention, in the structure of the swing post portion according to any one of the first to third aspects, the swing post mounting portion including the boss portion of the body of the body is formed by casting. ing.

[0017] In a limited space of the connecting portion between the body and the swing post, the manufacture of the swing post mounting portion is further facilitated and the strength is improved.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of a swing post of a working machine constructed in accordance with the present invention will be described below with reference to the accompanying drawings, which show a preferred embodiment of a hydraulic shovel as a typical working machine. This will be described in more detail.

Referring to FIGS. 1 and 2, the swing post, generally designated by the reference numeral 2, is mounted on the boss 8 of the body 6 of the excavator 4 in a substantially vertical direction (see FIGS. 1 and 2). The work device 1 is swingably mounted via a pin 11 which is a shaft member that penetrates an axis 10 extending in the vertical direction.
2 is connected to the swing post 2.

The swing post 2 is located above and below the boss 8 and has an upper boss 2a and a lower boss 2 through which the pin 11 is inserted.
b. A plurality of hydraulic hoses 14, which are flexible pipes, pass below the lower boss 2 b between the body 6 and the working device 12 through the swing post 2, and are located inside the body 6 and the swing post 2. Has been passed through.

The working device 12 includes a boom 12a supported by the swing post 2 so as to be swingable in a vertical direction, a boom operating cylinder 12b interposed between the swing post 2 and the boom 12a, and a vertical direction at a tip of the boom 12a. 12c, boom 12a and arm 1 that are swingably supported on
An arm operating cylinder 12d interposed between the arm 12c and the arm 12c, a bucket 12e supported at the tip of the arm 12c to be vertically swingable, and a bucket operating cylinder 12f interposed between the arm 12c and the bucket 12e. ing. The working device 12 does not constitute a novel feature of the present invention, and is known per se.

Referring to FIG. 3 together with FIG. 2,
The swing post 2 is integrally formed by casting.
When viewed from the side (FIG. 2), it is formed in a channel shape (U-shape), the boss 8 of the body main body 6 is positioned in the opening 2c, and the upper boss 2a is located above the opening 2c and the boss 8 is located below the opening 2c. A lower boss 2b is formed. Bearing holes 2d and 2e are provided around the axis 10 in the upper boss 2a and the lower boss 2b.
Are formed respectively. Above the upper boss 2a, a bracket 2f having a bearing hole and having a forked shape is provided. Back surface of opening 2c (left surface in FIG. 2)
A bracket 2g having a bearing hole on the side of the lower boss portion 2b and having a forked shape is provided. Further, a bracket 2h having a bearing hole on one side surface of a lower portion of the swing post 2 and formed in a forked shape is formed.

The boom 1 of the working device 12 is mounted on the bracket 2f.
2a, the boom operating cylinder 12b is connected to the bracket 2g. The bracket 2h is a mounting portion of an actuator that swings the swing post 2 (the swing actuator will be described later).

Below the lower boss 2b of the swing post 2, there is formed a flange 2k projecting like a tongue so as to form a space 3 with the lower boss 2b. The flange portion 2k is connected to the bracket 2h and is integrally formed.

The swing post 2 has a hollow portion 2m through which the hydraulic hose 14 can pass. Hollow 2m
Is provided with one opening 2n opened between the lower boss 2b and the flange 2k, and the other opening 2p opened between the upper boss 2a and the bracket 2f.

The body 6 is formed integrally by welding various steel members to each other, and the swing post mounting portion 9 including the boss portion 8 is integrally formed by casting. Boss part 8
Is formed in a thick cylindrical shape extending in the direction of the axis 10, and the length in the direction of the axis 10 is swingable about the axis 10 between the upper boss 2 a and the lower boss 2 b of the swing post 2. The length is specified to ensure the strength. The boss 8 has a bearing hole 8 a formed on the axis 10.
Below the boss 8, a lower boss 2b of the swing post 2 is provided.
A flange portion 9a projecting like a tongue is formed so as to form the space 3 described above. The flange portion 9a
Flange part 2k provided on swing post 2 and axis 1
The flange portion 2k and the swing post 2 are provided on substantially the same surface in the 0 direction, and are formed in a concave shape so as not to interfere when the swing portion 2 swings. A hollow portion 9b through which the hydraulic hose 14 can pass is formed inside the swing post mounting portion 9, and an opening 9c is formed between the boss portion 8 and the flange portion 9a.

Swing post 2 configured as described above
Further, the upper boss portion 2a and the lower boss portion 2b of the swing post 2 are aligned on the axis 10 with the boss portion 8 of the fuselage body 6, the pins 11 are inserted and connected, and the bracket 2h of the swing post 2 is attached. A swinging cylinder 16, which is a telescopic actuator for swinging the swing post 2, is mounted between the body and a bracket (not shown) provided on the body 6.

At least six hydraulic hoses 14 are provided for supplying and discharging hydraulic oil to each of the three hydraulic cylinders of the working device 12, namely, the boom operating cylinder 12b, the arm operating cylinder 12d, and the bucket operating cylinder 12f.
Are arranged between the hydraulic control device (not shown) of the body 6 and the working device 12 via the swing post 2. The hydraulic hose 14 passes through the opening 9 c from the hollow portion 9 b of the body 6, passes through the space 3 between the lower boss portion 2 b of the swing post 2 and the flange portion 9 a and the flange portion 2 k, and passes through the opening 2 n of the swing post 2. After entering the hollow portion 2m, it passes through the opening 2p to the base of the boom 12a of the working device 12, and is connected to each of the hydraulic cylinders of the working device 12.

The operation of the swing post structure of the working machine as described above will be described with reference to FIGS.

(1) Manufacture: The connection between the body 6 and the swing post 2 is changed from the conventional two to one, and the hydraulic hose 14 provided via the swing post 2 passes below the connection. It is easy to mold and machine the connecting part because of the special arrangement of welding jig, processing jig,
The need for a processing machine or the like is eliminated, the number of components is reduced, and the problem of high manufacturing costs can be eliminated.

(2) Strength: The boss 8 which can secure a sufficient length of the bearing in a closed cross section from the body 6 is projected from the body 6 and the connecting portion between the body 6 and the swing post 2. Since the structure is sandwiched between the upper boss 2a and the lower boss 2b, it is possible to easily secure sufficient strength at the connecting portion.

(3) Protection of the flexible pipe: A hydraulic hose 14 which is a flexible pipe which is easily damaged by contact with foreign matter or the like in a working machine is connected to a lower boss portion at a connecting portion between the body 6 and the swing post 2. 2b and flanges 2k, 9c
The hydraulic hose 14 can be sufficiently and appropriately protected with a simple structure because the space 3 formed by the space 3 is made to pass through. Further, since the hydraulic hose 14 is made to pass through the hollow portions 9c and 2m of the body 6 and the swing post 2, it is possible to reliably protect the hydraulic hose 14 from damage due to foreign matter or the like.

(4) Reinforcement of the swing cylinder mounting portion: The flange portion 2k formed below the lower boss portion 2b is integrally connected to the bracket 2h, which is the mounting portion of the swing motion cylinder 16, so that the bracket 2h is connected. Can be reinforced.

As described above, the present invention has been described in detail based on the embodiments. However, the present invention is not limited to the above-described embodiments, and can be variously modified or modified within the scope of the present invention. It is.

(1) Swing post mounting part of the body of the machine:
In the embodiment of the present invention, the swing post mounting portion 9 of the body body 6 is integrally formed by casting.
As shown in FIG. 4, the steel member is appropriately welded, such as by integrally welding a thick cylinder 18c between the upper and lower two plate members 18a and 18b to form a boss 18 having a closed cross section. May be configured.

(2) Swing post: Further, the swing post 2 is also integrally formed by casting, but this may also be constituted by appropriately welding steel members.

(3) Flange: In the embodiment of the present invention, the swing post 2
From the body portion 6 to the flange portion 9a.
Are protruding respectively, but the type of work machine,
Depending on the operation mode or the like, only one of the swing post 2 and the body 6 may be provided. Further, although the flange portion 9a and the flange portion 2k are provided on substantially the same surface, they may be overlapped not in the same surface but in the direction of the axis 10 (vertical direction).

(4) Flexible piping: In the embodiment of the present invention, the hydraulic hose 14 is provided as the flexible piping, but the flexible piping is a water hose depending on the type and form of the working device. Or an electric cable.

[0039]

According to the structure of the swing post portion of the working machine constituted according to the present invention, the connecting portion between the body of the working machine and the swing post to which the working device is connected so as to be swingably attached to the body. In addition, the present invention provides a structure of a swing post of a working machine, which can facilitate manufacture, reduce the number of parts, and improve strength.

[Brief description of the drawings]

FIG. 1 is a side view of a hydraulic shovel, which is a typical work machine having a swing post structure configured according to the present invention.

FIG. 2 is an enlarged view of a part of a swing post shown in FIG. 1;

FIG. 3 is a bottom view of a portion of the swing post as viewed in the direction of arrows AA in FIG. 2;

FIG. 4 is a cross-sectional view showing another embodiment of the swing post mounting portion of the body of the machine.

FIG. 5 is a side view of a conventional swing post post.

FIG. 6 is a plan view as seen in the direction of arrows BB in FIG. 5;

[Explanation of symbols]

 2: Swing post 2a: Upper boss portion 2b: Lower boss portion 2h: Bracket (actuator mounting portion) 2k: Flange portion 6: Airframe body 8: Boss portion 9: Swing post mounting portion 9c: Flange portion 11: Shaft member 12: Working device 14: Hydraulic hose (flexible piping) 18: Boss 50: Airframe main body 52: Swing post

Claims (4)

[Claims] 1. A swing post, which is swingably attached to a boss portion of a fuselage body via a shaft member disposed substantially vertically and to which a working device is connected, and a body body and a working device are connected via the swing post. A shaft member penetrating through the boss portion, and the swing post is located above and below the boss portion and an upper boss portion through which the shaft member is inserted. And a lower boss portion, wherein the flexible pipe passes below the lower boss portion and passes through the body body and the swing post, respectively. 2. A flange provided below the lower boss portion and provided on the swing post and / or the body of the machine to form a space through which the pipe passes between the lower boss portion and the lower boss portion. Structure of the swing post part of the working machine described. 3. The structure of the swing post portion of the working machine according to claim 2, wherein the flange portion of the swing post is integrated with a mounting portion of a telescopic actuator that swings the swing post. 4. The swing post structure for a working machine according to claim 1, wherein the swing post mounting portion including the boss portion of the body of the machine body is formed by casting.