JP2003206549A - Collapsible blade and work machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a collapsible blade and a work machine having a structure capable of narrowing a longitudinal and lateral width when folding up the blade. <P>SOLUTION: This blade 12 is composed of a main blade 12a of a central part, and sub-blades 12b on both ends. The sub-blades 12b are collapsibly installed on the back face side via a link mechanism 16 arranged on the back face side of the main blade 12a. A fixing means such as pins 32 and 33 are arranged for respectively fixing the sub-blades 12b to the main blade 12a in a juxtaposed state and a folding-up state. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a folding blade which is attached to a self-propelled working machine and used for leveling, accumulating soil and sand, shoveling, and the like, and a working machine having the folding blade attached thereto.

[0002]

2. Description of the Related Art In Japanese Utility Model Laid-Open No. 6-1459, a folding blade is formed into a shape such that its plan view is widened forward, and one end side of the blade is divided.
The sub blade is rotatably connected to the tip of an arm that is rotatable around the pin on the back of the blade, and when using the blade for work, align the sub blade with the end of the blade and fix it with a fixing pin. During transportation, the opposite side of the sub-blade attachment side of the blade is the front, the end of the sub-blade attachment side is inclined so that it is rear, and the sub-blade is positioned on the front side of the blade and fixed by the fixing pin, It is disclosed that the width of the entire blade including the sub-blades is set to be equal to or less than the width of the traveling body of the working machine to reduce the transportation width.

Further, Japanese Patent No. 2771121 discloses that
Side blades are provided at both ends of the blade so as to be rotatable around pins.When using the blades, the side blades are aligned with both ends of the blades by hydraulic cylinders, and during transportation, the side blades are bent rearward at a substantially right angle by the hydraulic cylinders to reduce the width. A narrow configuration is disclosed.

[0004]

[Problems to be Solved by the Invention] The actual Kaihei 6-145
The blade described in Japanese Patent No. 9 has a structure in which the blade is slanted for transportation, and therefore there is a problem that the front-back width including the working machine in the transportation posture when mounted on a trailer or the like is increased.

On the other hand, the blade described in Japanese Patent No. 2771121 has a structure in which the side blades are bent backward and transported around pins at both ends of the blade, and therefore the width of the entire blade is equal to that of the blade even when the side blades are bent. Since the width of both side blades is added to both ends, there is a problem that the posture during transportation does not become so narrow.

In view of the above problems, it is an object of the present invention to provide a foldable blade and a working machine having a structure capable of narrowing the width in the front and rear and the left and right when the blade is folded.

[0007]

A foldable blade according to claim 1 is a foldable blade attached to a self-propelled working machine, wherein the blade comprises a main blade at a central portion and sub blades at both ends, The sub-blade is foldably attached to the back side through a link mechanism provided on the back side of the main blade, and fixing means for fixing the sub-blade to the main blade in the state of being aligned and the state of folding are provided respectively. It is characterized by

As described above, by attaching the left and right sub-blades to the rear side so as to be foldable via the link mechanism provided on the back side of the blade main blade, is it possible to hide the sub-blades almost behind the main blade? Alternatively, it can be folded with a small amount of protrusion, and the transportation posture can be narrowed. Further, since the sub-blade is folded to the back side without tilting the blade in the front-rear direction, the front-rear width including the working machine during transportation is not increased.

According to a second aspect of the present invention, in the folding blade according to the first aspect, a projecting member is provided on an abutting surface of the sub-blade with the main blade, and the projecting member is fitted to a receiving member provided on the main blade. Thus, the sub-blade is arranged and joined to the main blade.

As described above, the sub-blade is connected to the main blade by fitting the projecting member provided on the sub-blade with the receiving member provided on the main blade. The sub-blade can be fixed to the main blade with a small protruding member as compared with the case where the sub-blade is fixed to the main blade.

A folding blade according to a third aspect of the present invention is the folding blade according to the first or second aspect, wherein the link mechanism includes a first link rotatably attached to a back surface of the main blade, and a first link. And a second link movably attached to the sub-blade and rotatably connected to the sub-blade.

As described above, by constructing the link mechanism with two links, the posture of the sub-blade can be arbitrarily set, the sub-blade can be easily attached and detached, and the sub-blade can be attached to the back surface of the main blade. Can be folded compactly.

A working machine according to a fourth aspect comprises the folding blade according to any one of the first to third aspects, and in the folded state of the blade, the blade width is set to be equal to or less than the width of the traveling body of the working machine. Is characterized by.

As described above, by mounting the folding blade on the working machine to construct the working machine, the entire width in the transportation posture does not exceed the width of the traveling body and the front-back width does not increase, and the transportation is performed. Can be done easily.

[0015]

1 is a side view showing an embodiment of a working machine to which a folding blade according to the present invention is applied. In the present embodiment, the case where the work machine is a hydraulic excavator will be described. The hydraulic excavator includes a revolving structure 3 installed on a traveling structure 1 via a revolving device 2, and a multi-joint front 5 having a bucket 4 attached to the revolving structure 3.

As shown in the side view of FIG. 2 and the plan view of FIG. 3, 6 is a blade device, and the blade device 6 swings up and down around the pin 1 on the frame 1a of the traveling body 1. It has a U-shaped swing frame 8 that is freely attached. The swing frame 8 is raised and lowered by a hydraulic cylinder 9 mounted between the traveling body frame 1a and the swing frame 8.

A main blade 12a of a blade 12 is attached to the center of the front end of the swing frame 8 so as to be swingable in the vertical direction and the front-back direction about a horizontal axis 10 and a vertical axis 11. Sub blades 12b are attached to both ends of the main blade 12a. Reference numeral 14 is a front-back swing hydraulic cylinder provided between the swing frame 8 and the main blade 12a. Reference numeral 15 denotes a vertical swing hydraulic cylinder provided between the swing frame 8 and the main blade 12a. Reference numeral 18 denotes a support arm that supports the blade 12 by swingably connecting the front upper center of the swing frame 8 and the central upper portion of the main blade 12.

FIG. 4 is a plan view for explaining the structure of the blade device 6, and FIG. 5 is a partial sectional rear view thereof. These figures show the sub-blade 12 during use of the blade 12.
The state which combined b with the main blade 12a is shown. 6 is a plan view showing a state in which the sub blade 12b is being attached / detached to / from the main blade 12a, and FIG.
It is a top view which shows the state which folded 2b to the back side of the main blade 12a.

The link mechanism 16 is, as shown in FIG. 6, a bracket 1 provided on the back surface of the main blade 12a.
7, a first link 20 rotatably attached about a pin 19, a second link 22 rotatably attached to the first link 20 by a pin 21, and the sub-link. Brackets 23a and 23b are provided so as to project from the back surface of the blade 12b.

8A to 8C show the sub-blade 1
The upper bracket 23a fixed to the back surface of 2b is shown. The bracket 23a has a hawk shape and has a pin hole 23c for connection. 8D to 8G show a lower bracket 23 fixed to the back surface of the sub-blade 12b.
The bracket 23b also has a hawk shape and has a pin hole 23d. Reference numeral 29 denotes a link fixing arm fixed to the sub-blade 12b, and in this example, a part of the lower bracket 23b is extended horizontally to form the link fixing arm 29. The link fixing arm 29 has a pin hole 29a at its tip.

FIG. 9 shows the structure of a bracket 17 fixed to the back surface of the main blade 12a. The bracket 17 has a U-shaped side surface, and two sets of pin holes 1 are provided at the top and bottom.
7a and 17b.

FIG. 10 shows the first link 20. The first link 20 has a box structure, has cylindrical portions 20a and 20b as insertion portions at both ends, and has the first portion at the middle portion. It has a tubular portion 20c which serves as a pin insertion portion for fixing the first link 20 to the bracket 17.

FIG. 11 shows the second link 22. The second link 22 also has a box shape, and the connecting portion 2 has pin holes 22d and 22e at the upper and lower ends, respectively.
2a and 22b, and a grip portion 22c on the back surface.

As shown in FIGS. 4 to 7, the first link 20 is partially fitted in the U-shaped bracket 17, and the cylindrical portion 20a at one end of the first link 20 and the pin of the bracket 17 are inserted. The pin 19 is inserted into the hole 17a to connect them. The tubular portion 20b at the other end of the first link 20 is formed by connecting the upper and lower connecting portions 22b at one end of the second link 22,
22b, and the pin holes 2 of these connecting portions 22b.
Pins 21 are inserted into 2e and the tubular portion 20b of the first link 20 to connect them. In the second link 22, the upper and lower connecting portions 22a at the other ends are attached to the brackets 23a and 23b.
And are connected to each other by pins 24, 24.

Main blade 12 of the sub-blade 12b
A projecting member (rod) 30 for coupling is projected on the abutting surface with a, and a receiving member 31 for fitting the projecting member 30 is provided on the abutting portions of both ends of the main blade 12a. As the receiving member 31, a cylindrical body or a plurality of rings as shown is provided. As shown in FIG. 5, two sets of the projecting member 30 and the receiving member 31 are provided one above the other.

Next, the recombination of the sub-blades 12b will be described. As shown in FIGS. 4 and 5, the blade 12
When used for work, the protruding member 30 of the sub-blade 12b is fitted to the receiving member 31 of the main blade 12a. In this state, the cylindrical portion 20c, which is an intermediate pin insertion portion of the first link 20, matches the pin hole 17b of the bracket 17 on the back surface of the main blade 12a, and the pin hole 17b and the cylindrical portion 20c that match the pin are pinned. Insert 32.

In this state, the first link 20 is fixed to the back surface of the main blade 12a and the second link 22 is fixed.
Is also restrained, and the movement of the protruding member 30 in the direction away from the main blade 12a is prevented, so that the sub blade 12b is fixed to the main blade 12a. In this state, the pressure applied to the sub-blade 12b during the work is received by the fitting between the projecting member 30 and the receiving member 31.

At the time of transportation, in FIG. 4, the pin 32 which fixes the first link 20 to the main blade 12a is pulled out, and the first link 20, the second link 22, and the sub blade 12b are made movable. To do. Then, the grip portion 22c provided on the back surface of the second link 22 is pulled, and the second link 22 is pinned while rotating the first link 20 about the pin 19 as shown by an arrow b in FIG. The sub-blade 12b is pulled out in the direction of the arrow a by rotating the 21 and the pin 24 relative to the first link 20 and the brackets 23a and 23b.

Next, the first link 20 and the second link 2
2 is rotated around the pin 19 toward the back side of the blade.
Then, as shown in FIG. 7, the tubular portion 2 of the first link 20.
0c and the pin 32 in the pin hole 17b of the bracket 17 to fix the first link 20, and to fix the pin hole 29a of the link fixing arm 29 to the pin hole of the bracket 27 and to fix by the pin 33. To do.

As described above, when the sub blade 12b is folded on the back surface of the main blade 12a, the sub blade 12b does not laterally project from the end surface of the main blade 12a. Further, as shown by the chain double-dashed line in FIG. 3, in the state in which the sub-blade 12b is folded, in the present embodiment, the width W1 of the blade is the width W2 of the traveling body 1 (in FIG. Half width W1 / 2, W2 / 2) or less (W1 ≦ W2).

In the present invention, as described above, the sub-blade 12b is almost hidden on the back side of the main blade 12a by attaching the sub-blade 12b through the link mechanism 16 attached to the back side of the main blade 12a. It can be folded with a small amount of protrusion, and the transportation posture can be narrowed. In addition, the sub-blade 12b is attached to the main blade 1 without tilting the blade in the front-back direction.
Since it is housed on the back surface of 2a, the front-rear width including the working machine is not increased.

Further, as the link mechanism, it is possible to adopt a mechanism in which the movable range of the sub-blade 12b is enlarged by sliding a pin in the long hole, but as in the present embodiment, two links 20, By configuring the link mechanism 16 with 22, the posture of the sub-blade 12b can be arbitrarily set, the sub-blade 12b can be easily attached and detached, and the sub-blade 12b can be compactly folded on the back surface of the main blade 12a. You can

Further, the protruding member 30 of the sub-blade 12b
When the blade 12 is fitted to the receiving member 31 of the main blade 12a and used for the work, as shown in FIG. 12, the pin 21 which is the rotation center of the second link 22 is Circumference c around the pin 19 which is the center of rotation
Since the pin 21 moves to the line and approaches the dead point d as the protruding member 30 is pushed into the receiving member 31, the sub-blade 12b is pressed against the main blade 12a with a large force by the lever principle, and a strong adhesion is obtained. . Also, when the sub-blade 12b is separated from the main blade 12a, a large opening force can be obtained by the same action. Therefore, even when the two are firmly fitted and in close contact, it is easy to use without using a tool such as a large hammer. Sub blade 12b as main blade 1
It can be folded to the back of 2a.

Further, in the case of carrying out the present invention, as means for arranging the main blade 12a side by side with the sub-blade 12b, the main blade 12a and the sub-blade 12b are provided with brackets in which the positions of the pin holes are the same. Although a structure in which they are fixed by separate vertical pins may be adopted, as in the present embodiment, the protruding member 30 and the receiving member 3 are used.
By having a structure in which the sub-blade 12b is connected to the main blade 12a by being fitted to the main blade 12a, as described above, as compared with the case where the sub-blade is fixed to the main blade by a separate vertical pin, The sub-blade 12b can be firmly fixed to the main blade 12a with the small pin 32, and the pin and the link provided on the back surface of the blade 12 can be made small.

Further, the bracket 17 has a U-shape, and the first link 20 is fitted to the bracket 17 and pivotally attached by the pin 19, and the first link 20 and the second link 22 have a box structure. Since the pin insertion portion of the link 20 is configured by the tubular portions 20a to 20c, the sub blade 12
A high-strength link mechanism can be obtained as the support member of b.

In carrying out the present invention, the working machine that can be used as the base machine may be something other than a hydraulic excavator. Further, the present invention provides a tilt mechanism (a mechanism for lowering one of the left and right end portions of the blade and a mechanism for raising the other end) as a means for changing the attitude of the blade 12, and an angle mechanism (one of the left and right end portions of the blade is moved forward). It is also applicable to a device which does not have one or both of a mechanism for retracting the other). Further, in the present invention, a bolt can be used as the fixing means of the link mechanism other than the pin.

[0037]

According to the first and fourth aspects of the invention, the left and right sub-blades of the blade are foldably attached to the back side via the link mechanism provided on the back side of the main blade. It can be almost hidden on the back side or can be folded with a small protruding amount, and the transportation posture can be narrowed. Further, since the sub-blade is housed on the back surface without tilting the blade in the front-rear direction, the front-rear width including the working machine during transportation is not increased.

According to the second aspect, the sub-blade is connected to the main blade by fitting the protruding member provided on the sub-blade with the receiving member provided on the main blade. Compared with the case where the sub blade is fixed to the main blade by the fixing means, the sub blade can be fixed to the main blade with a small protruding member.

According to the third aspect, since the link mechanism is composed of two links, the attitude of the sub-blade can be set arbitrarily, the sub-blade can be easily attached and detached, and the sub-blade can be used as the main blade. Can be compactly folded on the back of the.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a working machine to which a folding blade according to the present invention is applied.

FIG. 2 is a side view of the blade device according to the present embodiment.

FIG. 3 is a plan view of the blade device according to the present embodiment.

FIG. 4 is a plan view showing a state in which a sub blade is combined with a main blade during use of the blade in the present embodiment.

FIG. 5 is a rear view of FIG.

FIG. 6 is a plan view showing a state in which the sub blade is being attached to and detached from the main blade in the present embodiment.

FIG. 7 is a plan view showing a state in which the sub blade is folded to the back side of the main blade in the present embodiment.

8A to 8C are a plan view and a rear view of an upper bracket fixed to the sub-blade of the present embodiment, respectively.
It is a right side view. (D) to (G) are plan views of a lower bracket fixed to the sub-blade of the present embodiment,
It is a rear view, a right side view, and a bottom view.

9A and 9B are respectively a plan view and a rear view of a bracket fixed to the main blade of the present embodiment.

10A to 10C are a plan view, a cross-sectional view, and a rear view of a first link in the present embodiment, respectively.

11A to 11E are respectively a plan view of a second link in the present embodiment, a rear view of a central portion, an EE cross-sectional view of FIG. 11A, a partial rear view of a right portion, and a left portion. It is a partial rear view of a part.

FIG. 12 is a partially enlarged view of FIG.

[Explanation of symbols]

1: traveling body, 1a: traveling body frame, 2: turning device,
3: Revolving structure, 4: Bucket, 5: Articulated front, 6:
Blade device, 7: pin, 8: swing frame, 9: hydraulic cylinder, 10: horizontal axis, 11: vertical axis, 12: blade,
12a: main blade, 12b: sub blade, 14, 1
5: Hydraulic cylinder, 16: Link mechanism, 17: Bracket, 18: Support arm, 19: Pin, 20: First link, 21: Pin, 22: Second link, 23a, 23
b: bracket, 24: pin, 27: bracket, 2
9: link fixing arm, 29a: pin hole, 30: protruding member, 31: receiving member, 32: pin, 33: pin

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kunihiko Yoshida             Hitachi Construction Machinery Co., Ltd.             Ceremony Company Tsuchiura Factory

Claims (4)

[Claims] 1. A folding blade attached to a self-propelled working machine, wherein the blade is composed of a main blade at a central portion and sub blades at both ends, and the sub blade is provided on the back side of the main blade. A foldable blade characterized in that it is foldably attached to the back side via a link mechanism and provided with fixing means for fixing the sub-blades to the main blade in the state of being arranged and in the state of being folded, respectively. 2. The folding blade according to claim 1, wherein a projecting member is provided on the abutment surface of the sub-blade with the main blade, and the projecting member is fitted to a receiving member provided on the main blade. A foldable blade having a structure in which the sub-blades are arranged and joined to the main blade. 3. The folding blade according to claim 1, wherein the link mechanism includes a first link rotatably attached to a back surface of the main blade, and the link mechanism pivots on the first link. A foldable blade comprising a second link that is freely attached and is rotatably connected to the sub-blade. 4. A working machine comprising the folding blade according to any one of claims 1 to 3, wherein the blade width is set to be equal to or less than a width of a traveling body of the working machine in a folded state of the blade. .