JP2855579B2 - Variable width discharging blade structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction in which the width of a blade used for discharging soil by a backhoe or the like can be changed according to the width of a crawler.

[0002]

2. Description of the Related Art Conventionally, in a blade such as a backhoe, a technique for changing the width of the blade has been known. However, the conventional technique is not shown in FIG.
It was configured as shown in FIGS. FIG. 11 is a perspective view of a conventional variable-width blade, FIG. 12 is a plan sectional view showing the extended blade 10 in a wide state, and FIG. 13 is a plan sectional view showing the extended blade 10 in a narrow state. That is, when the extension blade 10 is fixed to the main blade 11 toward the outside, the width becomes wide, and when the extension blade 10 is overlapped toward the inside, the width becomes narrow.
Thus, the extension blade 10 is connected to the main blade 11
As for the method of attaching and detaching to and from, it is possible to attach and detach with bolts and nuts. However, since the attachment and detachment of the extension blade 10 by the bolt and the nut is troublesome, it has not been used much.

[0003]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and does not require the use of a tool, so that it can be easily attached and detached. Also, when the extension blade is stored, it can be easily changed to the storage state by slightly moving the protruding extension blade.

[0004]

The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described.
According to a first aspect of the present invention, in a turning work vehicle in which an upper swing body is capable of turning horizontally with respect to a lower traveling body and a work machine is pivotally mounted on the upper swing body toward the front, a blade for discharging soil is provided. The width in the left-right direction is made variable by extending an extension blade on the main blade, and the main blade support provided on the main blade is pivoted through a pivot shaft.
And pivot the extension blade around the pivot axis.
By changing the position by rotating the blade, it is possible to switch between extension and storage, a locking tool is provided for fixing the main blade and the extension blade, and the extension blade is fixed or inserted by inserting and removing the locking tool. It can be changed to a movable state. According to a second aspect of the present invention, in the turning work vehicle, the upper turning body is capable of turning horizontally with respect to the lower traveling body, and the working machine is pivotally mounted on the upper turning body toward the front.
The width in the left-right direction of the blade for discharging the earth is made variable by extending the extension blade on the main blade, and the width is pivoted with respect to the main blade support provided on the main blade.
The extension blade is pivotally supported via a support shaft, and is provided around the support shaft.
By changing the position by rotating the extension blade, it is possible to switch between extension and storage, a locking tool is provided to fix the main blade and the extension blade, and the extension blade is fixed by inserting and removing the locking tool. Or it can be changed to a movable state, and the extension blade is always supported on the main blade side
It is in a connected state with the tool . In claim 3,
In the variable width discharging blade structure according to claim 1 or 2, an operating portion is provided on the locking tool.

[0005]

Next, the operation will be described. The backhoe of the present invention
The width and height of the crawler devices 18L and 18R can be changed, and the present invention can adjust the width of the blade in accordance with the change in the width of the crawler. The main blade 11 is a blade having a normal width, and the extension blade 10 can be extended right and left of the main blade 11. The method of extending the extension blade 10 is such that the extension blade 10 is horizontally rotated around a pivot 24 constituting an extension blade support.

[0006]

Next, embodiments of the present invention will be described. 1 is a rear perspective view of a backhoe having a variable width discharging blade structure of the present invention, FIG. 2 is a plan view of a blade portion, FIG. 3 is a side view of the blade portion, and FIG. 4 is a crawler width adjusting device. FIG. 5 is a plan view showing a support portion of the extension blade 10, FIG. 6 is a plan view of a pivot portion of a pivot shaft 24 constituting the extension blade support portion, and FIG. 8
9 is a side cross-sectional view of a portion of the locking tool 21, FIG. 9 is a perspective view showing another configuration of the extension blade support portion, and FIG. 10 is a side cross-sectional view of FIG.

Referring to FIG. 1, the backhoe will be described. As shown in FIG. 4, the left and right crawler devices 18L and 18R can be adjusted in width right and left. Further, the vertical position of the crawler is simultaneously adjusted by adjusting the crawler width. When the width of the crawler changes in this way, the width of the blade needs to be changed accordingly. In the present invention, the blade is divided into a main blade 11 and an extension blade 10, and the extension blade 10 can be freely protruded and stored by one-touch operation. Next, the relationship between the left and right crawler devices 18L and 18R and the blade will be described with reference to FIGS. Between the left and right crawler devices 18L and 18R,
A swivel bearing 20 is arranged, and a pivotal support 28 at the rear of the blade support rod 31 is provided in front of the swivel bearing 20. Further, a blade cylinder 26 that moves the blade up and down is disposed between the left and right pivots 28.
The present invention relates to a blade mechanism that can be divided into a main blade 11 and an extension blade 10.

FIG. 4 discloses a width adjusting device for the crawler devices 18L and 18R. A swivel bearing 20 is arranged at the center of the traveling base, and lower frames 16 are provided at positions before and after the traveling base. The lower frame 16
Are provided with pivot pins 8 and 10 which are pivot portions of the variable leg links 2 and 3. The variable leg links 2 and 3 protrude left and right, and are also arranged in front and rear. In addition, four pairs are arranged in front, rear, left and right, and support the track frame 7 so as to be vertically adjustable. Front and rear adjustable leg links 2
3 between the left and right adjusting cylinders 1L
1R is arranged. As shown in FIG. 4, the pivotal positions of the adjusting cylinders 1L and 1R are different from the pivotal positions of the variable leg links 2.3 in a plan view.

The pivot pins 9 of the adjusting cylinders 1L and 1R
Is extended from the position of the bracket 29 of the adjusting cylinder 1L, 1R to the lower frame 16, and the pin of the pivot pin 8, 10 of the variable leg link 2, 3 extends through the penetrating portion of the lower frame 16. It is arranged on the same plane as the heads 4 and 6. Variable leg links 2 and 3 are pivot brackets 1
3 is pivotally supported by pivot pins 11 and 14. The adjusting cylinders 1L and 1R are pivotally supported on a pivot bracket 15 by pivot pins 12. 7 and track frame, 22
Is a track roller.

Next, referring to FIGS. 5, 6, 7 and 8, a mechanism for projecting and storing the extension blade 10 will be described. An extension blade support is formed on the back surface of the main blade 11. The extension blade support is composed of a main blade side support 25.
5 is projected, and a pivot 24 is pivotally supported between the main blade side supports 25. An extended blade-side support member 23 is fitted between the main blade-side support members 25 constituted by the pivot bracket, and both are pivotally supported by a pivot shaft 24. By rotating the extension blade-side support member 23 about the pivot shaft 24, the extension blade 1
Numeral 0 indicates that it can be stored in the protruding state of FIG. 5 and the storing state 10 ′. A locking member 21 composed of a pin is provided for fixing the storage member to the projecting state, and a locking hole 23a for inserting the locking member 21 formed by the pin is provided on the extension blade side support. One hole is provided in the tool 23, and two holes are formed in the main blade side support members 25, 25 as extension locking holes 25a and storage locking holes 25b on the left and right sides of the pivot shaft 24 in plan view. Is provided.

In FIGS. 6 and 7, an operating portion 30 constituted by a grip knob is provided at the upper end of a locking member 21 constituted by a pin. A retaining rod 32 that locks the operation unit 30 constituted by the grip knob to prevent the operation unit 30 from falling upward is provided in an inverted U-shape on the upper surfaces of the pivot brackets 25. Then, below the inverted U-shaped retaining rod 32, a grip knob rotation prevention stopper 29 for preventing the operation portion 30 constituted by the grip knob from moving left and right.
Is erected. Locking tool 21 constituted by the pin
This constitutes a retaining mechanism at the time of work. That is, a grip knob rotation prevention stopper 29 and a retaining rod 32 are provided as locking portions of the operating portion 30 formed by the grip knob above the locking member 21 formed by the pin. Then, after the position of the extension blade-side support member 23 is rotated by 180 degrees, when inserting the lock member 21 formed by a pin, first, the operating portion 30 formed by a grip knob is gripped, and The tool 21 is inserted into the hole, and the operating portion 30 constituted by the grip knob is lowered to a state where it is placed on the grip knob rotation prevention stopper 29, as shown at 30 'in FIG. Thereafter, the operating portion 30 is rotated about the locking member 21 to the lower surface of the retaining rod 32 so as to slide over the grip knob rotation preventing stopper 29.
At this time, the retaining rod 32 and the grip knob rotation prevention stopper 2
9, a gap is formed to the extent that the operation unit 30 can move, so that the operation unit 30 rotates below the retaining rod 32, and then from the upper surface of the grip knob rotation prevention stopper 29. It comes off and falls between the upright portion of the operation unit 30 and the grip knob rotation prevention stopper 29. As a result, the operation unit 30 constituted by the grip knob cannot move to the left and right, and even if the operation unit 30 is to be pulled upward, it cannot be pulled out because of the retaining rod 32.

Next, another embodiment shown in FIGS. 9 and 10 will be described. In this configuration, a pivot shaft 33 constituted by a support rod, a main blade side support member 34 constituted by a support cylinder , and the like are provided as extension blade supports. A pivot shaft, which is a horizontal axis,
33 are supported by, the pivot shaft 33 is fixed to the rear surface of the main blade 11, it is fitted in the main blade side support 34 that is constituted by the support tube. The pivot shaft 33 constituted by the support rod rotates up and down 180 degrees in a main blade side support member 34 constituted by a support cylinder. By this 180 degree rotation, as shown in FIG. 10, the extension blade 10 is in the retracted state, and the extended state
In this state, since there is no interference with the main blade 11, the locking member 35 constituted by the pin is removed, and then the pivot shaft 33 constituted by the supporting rod is turned 180 degrees, and By inserting the extension blade 36 into the extension blade 36, the extension blade 10 is in a state of being redundantly stored at the rear portion of the main blade 11.

[0013]

As described above, the present invention has the following advantages. The pivot shaft according to claim 1
33, the extension blade is pivotally supported via the pivot shaft 33.
Change the position by rotating the extension blade to the enclosure
Since it is possible to switch between extension and storage, as in the conventional technology, there is no need to switch between extension and storage with the bolt removed and the extension blade and main blade separated.
Due to the rotation around the pivot shaft, the change operation can be performed without applying a large force. Further, it is possible to change the blade width with one touch with the change of the width of the crawler devices 18L and 18R without operating the bolts and nuts with a tool as in the related art.
Further, it is possible to easily change the extension blade 10 between the protruding state and the stored state simply by switching the extension blade locking portion.

Since the extension blade is always connected to the main blade by the support, the extension blade is not detached from the main blade even when the extension blade is narrowed. Since the extension blade 10 is merely stored, the extension blade 10 is not lost, and even when the extension blade 10 is to be widened, it is only necessary to project the extension blade 10 in the stored state from the main blade 11.

According to a third aspect of the present invention, the operating portion is provided on the locking member.
Therefore, it is possible to easily insert and remove the locking tool. Also,
The latching tool is provided between the main blade 11 and the extension blade 10.
Since the distance is fixed, a large load is applied during work.
In spite of this, the extension blade lock is also fixed between both blades
Although it is highly possible that the operation unit is provided
This allows the operator to remove
-It is easy to exert the operation power of the finger.

[Brief description of the drawings]

FIG. 1 is a rear perspective view of a backhoe equipped with a variable width blade of the present invention.

FIG. 2 is a plan view of a blade part.

FIG. 3 is a side view of a blade part.

FIG. 4 is a rear sectional view showing a crawler width adjusting device.

5 is a plan view showing a pivot portion of the extension blade 10. FIG.

FIG. 6 is a plan view of a pivot portion of a pivot shaft 24 constituting an extension blade support portion.

FIG. 7 is a side sectional view of the same.

FIG. 8 is a side sectional view of a portion of the locking tool 21.

FIG. 9 is a perspective view showing another configuration of the extension blade support.

FIG. 10 is a side sectional view of the same.

FIG. 11 is a perspective view of a conventional variable width blade.

FIG. 12 is a cross-sectional plan view showing a conventional extended blade 10 in a wide state.

FIG. 13 is a cross-sectional plan view showing the extension blade 10 in a narrow state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Extension blade 11 Main blade 21 Locking tool 23 Extension blade side support tool 23a Locking hole 24 Pivot shaft 25 Main blade side support tool 25a Extension locking hole 25b Storage locking hole 29 Grip knob rotation prevention stopper 30 Operation part 32 Retaining rod 33 Pivot shaft 34 Main blade side support tool 35 Locking tool

Claims (3)

(57) [Claims] 1. A turning work vehicle in which an upper revolving structure is capable of turning horizontally with respect to a lower traveling structure, and a work implement is pivotally mounted on the upper revolving structure toward the front. The width in the direction is made variable by extending an extension blade on the main blade, and is extended via a pivot shaft to a main blade support provided on the main blade.
Pivot the blade and rotate the extension blade around the pivot axis
By changing the position, the extension and storage can be switched by turning, and a locking tool is provided to fix the main blade and the extension blade, and the extension blade can be fixed or movable by inserting and removing the locking tool Variable width earth discharging blade structure that can be changed to the state. 2. A swiveling work vehicle in which an upper swing body is capable of swinging in a horizontal direction with respect to a lower traveling body and a work machine is pivotally mounted on the upper swing body toward the front, and left and right of blades for discharging soil. The width in the direction is made variable by extending an extension blade on the main blade, and is extended via a pivot shaft to a main blade support provided on the main blade.
Pivot the blade and rotate the extension blade around the pivot axis
By changing the position, the extension and storage can be switched by turning, and a locking tool is provided to fix the main blade and the extension blade, and the extension blade can be fixed or movable by inserting and removing the locking tool State can be changed and the extension
The blade is variable in width, characterized in that the blade is always connected to the main blade support . 3. The variable width discharging blade structure according to claim 1, wherein an operating portion is provided on the locking member.