JP3436580B2 - Work arm - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a working arm of a working device for crushing, crushing, cutting and the like.

[0002]

2. Description of the Related Art Generally, as shown in FIG. 9, a working apparatus having a working arm for crushing, crushing, cutting, etc. is carried out by a pair of working arms (1). The pair of working arms (1) is rotatably supported by a support member (6) by a pin (2). Further, each working arm (1) is connected to the hydraulic cylinder (4) and the cylinder lot (5) by a pin (3), and each of the two working arms (1) is an object by the hydraulic cylinder (4). With a crushing blade sandwiched between the work arm,
Crush, crush, cut, etc.

This working device is mainly used by being attached to an arm portion of a self-propelled trolley such as a hydraulic excavator. Instead, it is attached and used. Attachment of a self-propelled trolley such as a hydraulic excavator of a work device can be stopped by a pin at the shovel attachment hole of the bracket (9) and the tip of the hydraulic excavator. The pair of brackets (9) are provided on a fixed plate (8) which constitutes a frame, and a rotary plate (7) is attached below the fixed plate (8) and is connected by a center pin (31). The rotating plate (7) has a support member (6).
A pair of working arms (1) are rotatably supported on the support member (6) by arm pins (2), and the working arms are opened and closed by the operation of a hydraulic cylinder (9). Although the rotating plate (7) is provided here, the supporting member (6) may be directly provided on the lower surface of the fixed plate (8) of the bracket (9) without using the rotating plate.

[0004]

In carrying out crushing, crushing, cutting and the like with such a working device, the structure has become large in size in recent years, and it is often necessary to crush a large object. It's coming. For that purpose, it is necessary to enlarge the work arm (1), widen the opening between the work arms, and efficiently clamp a large structure for crushing, crushing, cutting and the like. However, if the work arm is made large, the weight of the work arm is greatly increased, and therefore the hydraulic excavator and the hydraulic cylinder for driving the hydraulic excavator must be made large, and there is a limit to the size increase. for that reason,
The working arm must be light. Therefore, the work arm is provided with ribs on the surface to maintain the strength and reduce the wall thickness, but it is not possible to reduce the weight to a large extent. There was a problem that the sand and sand became heavy during the period, making it difficult to work.

[0005]

SUMMARY OF THE INVENTION The present invention is intended to solve the above problems, and in a working arm driven by a hydraulic cylinder, the outer shape of a frame joined to the end surface of the frame so as to sandwich the frame. Almost the same as
Shape is a plate-like member and the elongated plate member box-shaped structure formed by joined to the opening of the frame, the frame edge portion, a pin for supporting the work arm rotatably It is a "doglegged" type consisting of a part to be inserted and a linear part, and the frame has a wide end surface at the blade part and is joined to the end surface of the frame.
A plate-like member having a shape substantially similar to the outer shapes of the two frames is provided with a hole of an appropriate shape at a substantially central portion thereof, and a cylindrical member is joined to the hole, and the working arm is rotatable. The working arm is characterized by having a pin insertion hole for supporting and a pin insertion hole for connecting to a hydraulic cylinder. Further, in the work arm of the present invention, the portion of the pin insertion hole for the frame to rotatably support the work arm is formed in a recess , and the recess is formed.
Is thicker than the other parts and is connected to the end face of the frame.
The plate-shaped members to be joined are bent in response to changes in the frame thickness.
The hole through which the pin that rotatably supports the working arm is inserted is a plate that projects into the recess of the frame.
It is characterized in that it is formed in a strip-shaped member .

Further, the working arm of the present invention is a working arm.
The part where the hydraulic cylinder of
And a pin insertion hole for connecting the working arm to the hydraulic cylinder is provided in the projecting portion of the plate-like member joined to the end surface of the frame. To do. Further, the working arm of the present invention includes a portion where the hydraulic cylinder of the working arm is arranged.
Where is, it has become a straight line corresponding to the frame.
In addition , the reinforcing plate is provided on the projecting portion of the plate-shaped member having the pin insertion hole for connecting the work arm to the hydraulic cylinder.

[0007]

According to the present invention, the blade portion, the portion through which the pin for rotatably supporting the working arm is inserted, and the linear portion are formed in a dogleg shape, and the end portion of the blade portion is wide. The outline of the frame and the frame joined to the end face of the frame
Since it is a box-shaped structure formed by a plate-shaped member having a similar shape and an elongated plate-shaped member joined to the opening of the frame, and a pin insertion hole for rotatably supporting the working arm. And a pin insertion hole for connecting to the hydraulic cylinder is provided in the plate-like member, and the frame has only a skeleton portion for ensuring the strength of the working arm, so that the weight is reduced, and thereby the hydraulic excavator. , Without changing the ability of the hydraulic cylinder to drive the working arm,
The working arm can be made large and a large arm opening can be obtained.

[0008]

Embodiments of the present invention will be described with reference to the drawings. [Embodiment 1] A first embodiment of the present invention will be described with reference to FIGS. 1 is a view showing a working arm according to an embodiment of the present invention, and FIG. 1A is a plan view of the working arm.
1B is a side view from the left of FIG.
FIG. 1C is a sectional view taken along the line cc of FIG. 2 is a view showing a frame, FIG. 3 is a view showing plate-like members joined so as to sandwich the frame, and FIG. 4 is a view showing elongated plate-like members joined to an opening of the frame.

As shown in FIG. 1 (a), the working arm (1) has a frame (14) and two plate-like members (12) joined to the end face so as to sandwich the frame (14). There is. Further, an elongated plate member (16) is joined to the opening of the frame (14), and these members are formed as a box-shaped structure. A frame (14) is shown in FIG. In this frame (14)
Blade part (14a) for performing work such as crushing, crushing and cutting
(14b) is provided, and the boss (1) is a portion through which a pin for rotatably supporting the working arm (1) is inserted.
4c) is provided, and the upper straight part (14
d )).

The frame (14) needs to be a structure so that strength can be maintained as a working arm. For that purpose, it is desirable to make the shape like a dogleg as shown in FIG. 2, and it is preferable to widen the blade portions (14a) and (14b). The plate-like member (12) is joined to both ends of the frame (14) on the end surface of the frame (14), and it is necessary to join them so that sufficient strength is maintained.
The end surface of the frame (14) has a width necessary for joining, for example, welding, so that sufficient joining strength can be obtained. The frame (14) is made of, for example, steel material, casting, or the like, and the joining is performed by welding.

FIG. 3 shows a plate-like member (12) joined to the end surface of the frame (14) and has a shape similar to the outer shape of the frame (14). (1 of the plate member (12)
Portion of 2 a), the blade portion of the frame (14) (14b)
However, since the blade portions (14a) and (14b) of the frame (14) are thickened, sufficient strength can be obtained. The plate-like member (1 2 ) is provided with a portion (1 2 b) serving as a pin insertion hole, and the frame (1 2
This is a portion joined to the boss (14c) of 4).

The portion of the working arm where the hydraulic cylinder is located is straight, corresponding to the portion (14 d ) of the frame (14), and for connecting the working arm to the hydraulic cylinder. of, and has a protruding portion (1 2 c) providing a pin insertion hole. The plate-shaped member is made of, for example, a steel plate. FIG. 4 shows an elongated plate-like member (16), which is a frame (1
This is a member for closing the side opening of 4). Further, the same material as the plate member, for example, a steel plate is used for this.

As shown in FIG. 1A, the working arm composed of the box-shaped structure formed by the frame (14), the plate-shaped member (12) and the elongated plate-shaped member (16).
(B) and (c) will be described. The plate-like member (12) is joined to the end surface of the frame (14), and the elongated plate-like member (16) is joined to the opening of the frame (14) to form the working arm (1) of the box-shaped structure. It The pin (21) for rotatably supporting the working arm is inserted into the frame (1).
It is formed on the boss portion (14c) and the plate member (12) of 4).

A pin insertion hole (2 for connecting the hydraulic cylinders)
2) is provided in a portion of the plate-shaped member (12) that projects from the frame (14). For this, see Figure 1.
(B) (This is a side view from the left of FIG. 1A, and the projecting portion of the plate-like member (12) and its pin insertion hole (22) are BB cross-sectional views). A pin insertion hole (22) is provided in a portion of the two plate-shaped members (10) protruding from the frame (14). In this portion, a reinforcing plate (18) may be provided outside the plate member (12).
The reinforcing plate (18) may be omitted if sufficient strength is maintained by the plate member (12).

As shown in FIG. 1C, the frame (1
The plate-like members (12) are joined to both sides (upper and lower sides in this figure) of 4), and the elongated plate-like members (16) are joined to the openings of the frame (14). In addition, the tubular body (1
9) is joined to the two plate-like members (12). The tubular body (19) is joined to the end surface of the frame (14) by 2
When the plate-shaped member (12) of one piece is large, the strength may not be maintained. In that case, two plate-shaped members (1
By joining the tubular body (19) to 2), the plate member (12) maintains its strength without bending. Cylindrical body (1
Regarding 9), the case where one piece is provided is shown in this embodiment, but two pieces or more pieces may be provided if necessary.
Further, in this embodiment, the cylindrical body is shown as a cylinder, but it may be a prismatic cylinder. If necessary for reinforcement, the blade portions (14a) (14) of the frame (14)
A rib may be attached to the inside of b).

[Second Embodiment] A second embodiment of the present invention will be described with reference to FIGS. 5A and 5B are views showing a work arm according to a second embodiment of the present invention, FIG. 5A is a plan view of the work arm, and FIG. 5B is a left side view of FIG. 5A. It is a side view and FIG.5 (c) is CC sectional drawing of FIG.5 (a). FIG. 6 is a diagram showing a frame, and FIG. 7 is a diagram showing a plate-shaped member. As shown in FIG. 5A, the working arm (1) includes a frame (15) and a frame (1
5) Two plate-like members (1
0) are joined. An elongated plate member (17) is joined to the opening of the frame (15), and these members are formed as a box-shaped structure.

The frame (15) is shown in FIG. The frame (15) is provided with blades (15a) (15b) for performing operations such as crushing, crushing, and cutting, and a portion through which a pin for rotatably supporting the working arm (1) is inserted. A hollow (15c) is formed in the area. Further, the portion where the depression (15c) is formed is formed thicker than the other portions, that is, the blade portions (15a) and (15b). FIG. 7 shows a plate-shaped member (10) joined to the end surface of the frame (15) and has a shape similar to that of the frame (15) shown in FIG. The plate-shaped member (10) is enlarged and has a projecting portion (10b) at a portion where a pin insertion hole for supporting is formed. In addition, the portion forming the pin insertion hole for connecting to the hydraulic cylinder also has an overhanging portion (10
c). Further, the plate member (10) is slightly bent in accordance with the change in the thickness of the frame (15).

As shown in FIG. 5 (a), the working arm composed of the box-shaped structure formed by the frame (15), the plate-shaped member (10) and the elongated plate-shaped member (17) as described above.
(B) and (c) will be described. A recess is provided in the portion where the pin insertion hole is provided, and plate-shaped members (10) that are bent in response to changes in the thickness of the frame are joined to both end faces of the frame (15) that is thick, and The elongated plate member (17) is joined to the opening of the frame (15) to form the working arm (1) of the box-shaped structure. The hole (21) through which the pin that rotatably supports the working arm is inserted is formed in the plate-like member (10) that overhangs the recess of the frame.

As shown in FIG. 5 (b), the pin insertion hole (22) for connecting the hydraulic cylinder is provided in the portion of the plate member (10) protruding from the frame (15) as in the first embodiment. Has been. In addition, a plate-shaped member (1
A reinforcing plate (18) may be provided outside of 2). Figure 5
As shown in (c), plate-like members (10) are joined to both sides (upper and lower sides in this figure) of the frame (15), and an elongated plate-like member (17) is provided in the opening of the frame (15). Are joined. Further, the cylindrical body (19) is joined to the two plate-like members (12) as in the first embodiment.

As described above, the pin insertion hole (21) for rotatably supporting the work arm (1) is provided in the two plate members (10), and the pin insertion hole of the work arm is provided. Is formed by the recess of the frame (14), and the boss portion of another working arm can be inserted into this void. That is, when the two working arms (1) are rotatably supported by one pin (2) as in the working device shown in FIG. 9, the boss portion of the working arm described in the first embodiment is described. The two plate-like members (10) of the working arm shown in the above-mentioned Embodiment 2 are projected and fitted into the void formed by the recess (15c) of the frame (15), and the pin insertion holes (21) are aligned. And is supported by pins.

This will be specifically described with reference to FIG.
The pin insertion holes of the two working arms are aligned between the outer two support members (6) (6), and the pins (35) are inserted. One working arm is the one shown in the first embodiment, and a frame (14) and two plate-like members (12) are shown. A bush (38) is fitted in the pin insertion hole and is rotatably supported by the pin (35). The other working arm is the one shown in the second embodiment, and this portion of the frame is a recess, and two plate-shaped members (1
Only 0) is shown. The plate member (10) has a bush (20). The frame (14) and the plate-shaped member (12) are formed in space by two plate-shaped members (10).
The working arm having (12) is inserted. Further, as shown in this figure, a bush (37) is provided so as to smoothly rotate around the pin (35), and the two working arms rotate around the pin (35) in different directions. A ring (36) is inserted between (37) and (38). When the working arms are individually rotatably supported by the pins, two working arms shown in the embodiment of the present invention can be used.

[0022]

As described above, according to the present invention,
By making the work arm a box-shaped structure, the weight can be reduced, and a large work arm can be attached, operated and operated without changing the ability of the hydraulic excavator and the hydraulic cylinder that drives the work arm. it can. As a result, the opening of the working arm can be widely widened, and the work of crushing, crushing, and cutting an object such as a large structure can be efficiently performed.

[Brief description of drawings]

FIG. 1 is a diagram showing a work arm according to an embodiment of the present invention.

FIG. 2 is a diagram showing a frame of a work arm according to an embodiment of the present invention.

FIG. 3 is a diagram showing a plate-shaped member of a work arm according to an embodiment of the present invention.

FIG. 4 is a view showing an elongated plate-shaped member of a working arm according to the embodiment of the present invention.

FIG. 5 is a view showing a work arm according to another embodiment of the present invention.

FIG. 6 is a view showing a frame of a work arm according to another embodiment of the present invention.

FIG. 7 is a view showing a plate-shaped member of a working arm according to another embodiment of the present invention.

FIG. 8 is a view showing attachment of a work arm according to another embodiment of the present invention.

FIG. 9 is a diagram illustrating a work arm having a work arm.

[Explanation of symbols]

1. Working arm 2. pin 3. pin 4. Hydraulic cylinder 5. Piston rod 6. Support member 7. Rotating plate 8. Fixed plate 9. bracket 10. Plate-shaped member 12. Plate-shaped member 14. flame 15. flame 16. Elongated plate member 17. Elongated plate member 18. Reinforcement plate 20. Bush 21. Pin insertion hole 22. Pin insertion hole

Claims (4)

(57) [Claims] 1. In a working arm driven by a hydraulic cylinder, the outer shape of the frame is substantially the same as the outer shape of the frame joined to the end faces of the frame so as to sandwich the frame.
A plate-like member and the elongated plate member box-shaped structure formed by joined to the opening of the frame, the frame for inserting the pin for supporting the blade unit, the working arm rotatably It is a "dog-legged" type consisting of a part and a straight part, and the frame has a wide end face at the blade portion, and two frames are joined to the end face of the frame .
A plate-like member having a shape substantially similar to the outer shape of the frame is provided with a hole of an appropriate shape at the substantially center thereof, and a cylindrical member is joined to the hole, and the work arm is rotatably supported. And a pin insertion hole for connecting to the hydraulic cylinder. 2. A frame has a pin insertion hole portion for rotatably supporting a work arm formed in a recess, and
The portion where the depression is formed is formed thicker than the other portions, and the plate-like member joined to the end surface of the frame is a frame.
The holes that are bent to accommodate changes in the thickness of the work frame and through which the pins that rotatably support the work arm are inserted are
The working arm according to claim 1, wherein the working arm is formed on a plate-shaped member that projects in the recess of the boom . 3. A hydraulic cylinder of a working arm is arranged.
The part that corresponds to the frame becomes a straight line corresponding to the frame.
And which, according to claim 1 in which the pin insertion hole for connecting the working arm to the hydraulic cylinder, characterized in that provided in the projecting portion of the plate-like member joined to the end surface of the frame
Or the working arm according to 2. 4. A hydraulic cylinder of a working arm is arranged.
The part that corresponds to the frame becomes a straight line corresponding to the frame.
And which, according to any one of claims 1 to 3, characterized in that the reinforcing plate protruding portion of the plate-like member in which the pin insertion hole for connecting the working arm to the hydraulic cylinder is provided is provided Working arm.