JP2001049685A - Blade device for hydraulic shovel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a blade device for a hydraulic shovel having a high grading efficiency and also a transport function. SOLUTION: A support arm 12 is provided in the lower traveling body frame 2a so as to be vertically movable. A blade body 11 having a turning back part 11a projecting to the oblique forward direction at the upper end is fitted to the tip of the support arm 12 so as to be vertically rotatable. A rise and fall cylinder 13 is provided between the support arm 12 and the lower traveling body frame 2a, A blade body 11 is provided between the turning back part 11a and the lower traveling body frame 2a and further, a snap cylinder 14 for a snapping action is provided. A plurality of claw members 15a are provided to form a comb-shape in the longitudinal direction of the lower part of the rear side of the blade body 11. A detachable fork member 16 is provided in the blade body 11. A projection 11g is formed to set a steel pipe at an appropriate position of the front face of the blade body 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blade device for a hydraulic shovel, and more particularly to a blade device having improved leveling efficiency and having a transport function.

[0002]

2. Description of the Related Art A hydraulic excavator having a crawler-type undercarriage requires not only excavation but also plowing, leveling, and transporting operations. In other words, when excavation is performed, it is necessary to perform plowing and leveling as a finishing work, and it is necessary to transport materials and remaining materials. Therefore, many hydraulic excavators currently used are provided with a dozer blade at the tip of a support arm attached to a lower traveling body so as to be vertically swingable, in addition to a bucket for excavation. Further, there has been proposed a device in which a fork member is provided so as to be detachable in order to enhance the transport efficiency.

[Problems to be solved by the invention]

[0003] However, the excavating ability of the conventional hydraulic excavator has been very advanced, but the leveling function has not been advanced much. In other words, bulldozers have been developed in which the blades can be finely adjusted by tilting, angle, and snap operations.However, in many blade devices mounted on hydraulic excavators, the blades are fixed to a support arm. And still,
Skilled technicians skillfully operate the dozer blade to perform leveling work.

[0004] In particular, when the hard ground is slightly ground slightly and ground leveling is finished, it is difficult to finish to a delicate depth (required depth) due to excessive digging or the like by digging with a bucket. Work is inefficient and inefficient. In addition, when leveling using the dozer blade while backing the hydraulic excavator, if there is an obstacle such as a large stone, it must be manually removed beforehand, which is complicated and inefficient.

[0005] Prior to excavation and leveling work, or
After that, it is necessary to transport various materials and remaining materials.
In this case, a dedicated vehicle such as a forklift cannot be used on a muddy or uneven site, which is inconvenient and, if performed by another machine, is inefficient and costly.

[0006] The present invention has been proposed to solve the above-mentioned problems, and an object of the present invention is to provide a blade device that enables even an unskilled person to efficiently and beautifully level the ground.

Another object of the present invention is to provide a blade device which has a transport function required in association with excavation and leveling work, particularly a transport function on a muddy or uneven site. It is.

[0008]

In order to achieve the above object, according to the first aspect of the present invention, there is provided a support arm having one end supported by a lower traveling frame so as to be vertically swingable. A blade device for a hydraulic shovel, comprising: a blade body attached to an end; and a blade elevating cylinder interposed between the support arm and the lower traveling body frame, wherein a back lower longitudinal portion of the blade body is provided. A plurality of claw members are provided in a comb shape in the direction.

[0009] With this configuration, for example, when leveling while backing the fuselage, it is possible to level the ground while accumulating large stones with a plurality of claw members provided in a comb shape at the lower portion of the back of the blade body. Can and is efficient.

According to a second aspect of the present invention, there is provided a support shaft protruding substantially at the center of a lower portion of a lower traveling frame such that an axial center thereof is oriented in the front-rear direction, and a lower front of the lower traveling frame. A swing frame rotatably provided about the axis of the support shaft, a blade body having one end attached to the other end of a support arm that is vertically swingably supported by the swing frame, A blade elevating cylinder interposed between a support arm and the lower traveling frame, and a blade elevating cylinder interposed between the swing frame and the lower traveling body; A hydraulic excavator blade device including a tilt cylinder for tilting the blade body, wherein a plurality of claw members are provided in a comb shape in a longitudinal direction of a lower surface of a back surface of the blade body. And butterflies.

As described above, the blade body is configured to be capable of tilting operation. In addition to the same operation as described above, it is possible to more easily and efficiently perform a leveling operation on an inclined surface or a narrow place. Can be.

According to a third aspect of the present invention, in the blade device according to the first aspect, the blade main body is attached to the support arm so as to be vertically rotatable, and
A snap cylinder for snap-operating the blade body is provided between an upper back surface of the blade body and the lower traveling frame.

The invention described in claim 4 is the same as the claim 2.
In the blade device according to, the blade body,
Attached to the support arm so as to be rotatable vertically,
Further, a snap cylinder for snapping the blade body is provided between an upper back surface of the blade body and the swing frame.

Here, the snap operation means that the blade main body is inclined forward and backward about a mounting pin connecting the blade main body and the support arm as a fulcrum due to the expansion and contraction of the rod of the snap cylinder.

As described above, since the blade body can be snap-operated, even an unskilled person can easily perform the leveling work. In addition, since the snap cylinder is provided between the blade body and the lower traveling body frame or between the swing frame, the stroke of the cylinder can be lengthened, and the displacement of the inclination angle of the blade body is increased (for example, (About 100 degrees).
Therefore, by appropriately changing the angle of inclination, the relationship between the claw member and the ground can be changed, and various leveling operations can be performed in accordance with the construction content.

For example, if the excavation is insufficient during leveling, the claw member can be set up appropriately and the ground can be loosened with the claw member to level the ground to the expected finish height while the body is backed. Further, in a park or the like, after the mowing or lawn mowing, the claw member is adjusted so as to stand on the ground, and the aircraft is moved forward or backward. Furthermore, if the blade body is tilted to a substantially horizontal position, the upper surface of the blade body can be used as a carrier for transportation, and the blade body can travel on steep slopes without any obstacles. it can.

According to a fifth aspect of the present invention, in the blade device according to the first, second, third or fourth aspect, a detachable fork member is attached to the blade body.

With such a configuration, by attaching the fork member, the transportation work accompanying the ground leveling work can be achieved by one body, which is efficient.

The invention according to claim 6 is the invention according to claims 1, 2,
The blade device according to 3, 4, or 5, wherein an upper end portion of the blade main body is formed to have a return portion projecting obliquely forward in an upper direction.

With this configuration, for example, when the blade body is used as a carrier for transportation, the loading effect is increased. When a fork member is installed,
It can be used as a storage space when the fork member is not used. Also, when performing a dozer operation, the soil is hardly spilled, and a large amount of soil can be processed at one time.

[0021] The invention described in claim 7 is based on claims 1, 2,
7. The blade device according to 3, 4, 5 or 6, wherein a plurality of projections for mounting a steel pipe are provided at appropriate positions on the front surface of the blade body.

With this configuration, for example, when the blade body is used in a horizontal position and used as a carrier for transportation, appropriate steel pipes, which are often present at various construction sites, are attached to the projections of the blade body. Can be a carrier. If a steel pipe pipe longer than the fork member is used, a larger object can be transported, and the effect as a transport vehicle is further enhanced.

[0023]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a hydraulic shovel (airframe) to which a blade device according to an embodiment of the present invention is attached.
FIG. 2 is a side view of the hydraulic shovel 1, which has a conventional configuration, and has a crawler-type lower traveling body 2, an upper revolving body 3 rotatably provided above the lower traveling body 2, and an attachment 4 attached to a front part thereof. And The attachment 4 includes a boom 5 swingably attached to the upper swing body 3, an arm 6 swingably provided at a distal end thereof, and a member such as a bucket 7 attached to the arm 6. You. The hydraulic cylinders interposed between the front part of the upper revolving unit 3 and the boom 5, between the boom 5 and the arm 6, and between the arm 6 and the bucket 7, respectively. The desired bucket operation can be performed as in the prior art.

The blade device 10 according to the present embodiment is
It is mounted on the lower traveling body frame 2a. As shown in FIGS. 2 to 4, the blade device 10 includes a blade main body 11, a support arm 12 that supports the blade main body 11 so as to be vertically swingable, a support arm 12 and a lower traveling body frame. 2a and a snap cylinder 14 for snap-operating the blade body 11.

Here, the width of the blade body 11 in the longitudinal direction is wider than the lower traveling body 2 (for example, when the width of the lower traveling body 2 is 1.5 m, the width of the blade body 11 is 1.7.
m). This is the
This is to prevent the soil from spilling from the blade body 11 and to prevent the lower traveling body 2 from riding on the spilled soil. Further, the blade body 11
Is used as widely as possible to efficiently perform work such as leveling and transportation.

As shown in FIGS. 3 and 4, a plurality of (in this embodiment, 17) substantially triangular claw members 15a are combed at equal intervals on the lower rear surface of the blade body 11. As shown in FIGS. The claw mounting plate 15 provided in the shape of
It is screwed by.

The upper end of the blade main body 11 is formed to have a return portion 11a projecting obliquely upward and forward. At the left and right ends of the return portion 11a, cutouts 11b for accommodating the detachable fork member 16 within the longitudinal width of the blade body 11 are formed.
A fork holding member 11c for holding the fork member 16 is provided on the upper surface near the base end of 1b.
As shown in FIG. 3, a pair of fork storage members 11d for inserting and storing the distal end of the fork member 16 are provided substantially at the center of the return portion 11a, and the insertion portions are oriented in the left and right directions, respectively. It is arranged. The fork member 16 is screwed to the return portion 11a by a bolt 16a.

One end of a support arm 12 is connected to a pair of left and right arm mounting brackets 11e projecting from the back surface of the blade body 11 via pins so as to be rotatable in the vertical direction. The other end of the support arm 12 is connected to a pair of left and right arm support brackets 17 projecting from the lower front surface of the lower traveling frame 2a via pins so as to be rotatable in the vertical direction. The support arm 12 includes a bridge rod 12a.
And a lifting cylinder mounting bracket 12b protruding from a substantially central portion in the left-right direction of the bridge rod 12a.
, The bottom side of a blade elevating cylinder 13 for vertically moving the blade body 11 is rotatably connected via a pin. The tip of the rod of the blade elevating cylinder 13 is rotatably connected to an elevating cylinder supporting bracket 18 protruding from an upper portion of the lower traveling body frame 2a via a pin.

The snap cylinder mounting bracket 11f protruding from the rear end of the upper surface of the return portion 11a of the blade main body 11 has a bottom side of a snap cylinder 14 for snap-operating the blade main body 11.
It is rotatably connected via a pin. The tip of the rod of the snap cylinder 14 is connected to the lower traveling frame 2a.
The snap cylinder support bracket 19 protruding from the
It is rotatably connected via a pin.

FIGS. 5 and 6 show a side view of the blade device 10 with the fork member 16 mounted on the front surface of the blade main body 11 and a front view of the blade main body 11, respectively. The fork member 16 is formed with a mounting piece 16b, and the mounting piece 16b can mount the fork member 16 at a plurality of bolt holes provided for mounting the above-described claw mounting plate 15 on the blade body 11. Is screwed on with a square bolt 16c provided at the bottom.

As shown in FIG. 7, a protrusion 11g for mounting a steel pipe 25 is provided near the base end of the return portion 11a on the front surface of the blade body 11.
It is provided at three places on the left, right, and center. A through hole 11h is provided from the tip of the projection 11g so as to penetrate a pin member such as a bolt. This through hole 11h
Is provided such that when a bolt hole is formed in the steel pipe 25 to be mounted, a pin member such as a bolt is mounted in the bolt hole so that the mounting of the steel pipe 25 can be stabilized. Things. However, in the present embodiment, since the lower surface of the steel pipe 25 is supported by the tip 11i of the blade body 11, it is not always necessary to attach a pin member. In addition, for example, the diameter is 48.6 m.
Since there are many steel pipes at m construction sites,
It is preferable that the projection 11g has a diameter of about 30 mm and a length of about 100 mm because it can be used for general purposes. 11g of this projection
If a steel pipe 25 longer than the fork member 16 is attached, a larger bed can be provided and a large material can be transported.

Next, an actual operation of such an embodiment will be described. FIG. 8 shows a situation in which the ground is backed up and the ground leveling work is performed at the tip 11i of the blade main body 11 while backing the body and collecting large stones with the claw members 15a provided in a comb shape. in this case,
It is possible to achieve a single step by omitting the work of manually collecting large stones, which is conventionally required, and it is efficient. Further, when removing stones and the like at the leveled, the blade body 11 is raised by the blade lifting cylinder 13,
This can be achieved without damaging the existing ground by accumulating stones and the like with the claw members 15a on the ground side while backing the airframe (not shown).

FIG. 9 shows a work situation when it is desired to level the ground by lowering the hard ground slightly. That is, the claw member 15a is set up so as to abut against the scheduled finishing height, and the hard ground is loosened by the claw member 15a while the body is backed (FIG. 9A). Then, the loosened soil is pushed by the blade body 11 to be collected and leveled to a finishing height (FIG. 9B). In this case, when excavating with the bucket 7 as in the related art, it is difficult to perform an average operation such as excessive excavation. Further, since the bucket 7 is far from the machine body and works at the claw width portion of the bucket 7, the efficiency is low.
On the other hand, according to the device according to the present invention, since the claw members 15a are close to the body, the weight of the body is efficiently transmitted, and the ground is easily loosened. Further, since the claw member 15a is provided in a comb shape in the longitudinal direction of the blade body 11, the claw member 15a can be operated at a time by the width thereof, which is efficient.

Further, when the loosened soil is pushed and collected, the blade body 11 is formed with the return portion 11a, so that the soil hardly overflows and many dozer operations can be performed at once.

FIG. 10 shows a situation where a target object is removed in a park or the like after mowing and lawn mowing without damaging the ground below. That is, the claw member 15a is set up to the maximum, and the claw member 15
Grass and the like can be accumulated in a.

FIG. 11 shows a situation in which the vehicle runs on a steep slope or the like by itself. That is, by contracting the snap cylinder 14, the lower end of the blade main body 11 can be considerably raised, and the self-propelled vehicle can be run without any trouble.

When the blade body 11 is inclined to a substantially horizontal position as described above, the blade body 11 can be used as a carrier without using an attachment such as the fork member 16 or the like. Furthermore, as described above, a large bed can be made by inserting a plurality of steel pipes on site. Therefore, it can be used as a suitable transporting vehicle even on a muddy or uneven site.

FIG. 12 shows a situation in which a large item is carried. That is, the blade main body 11 is tilted almost horizontally, and a considerably large object can be transported by using the bucket 7 and the return portion 11a of the blade main body 11, which is smaller than the transport amount of the conventional bucket 7 alone. , Efficient carrying work can be achieved.

Next, another embodiment shown in FIGS. 13 to 15 will be described. Here, FIG. 13 and FIG.
1 shows a side view and a plan view of the blade device 10 provided with a tilt cylinder 20 for tilting the blade main body 11, respectively. FIG. 15 is a cross-sectional view taken along the line AA of FIG. 13, and FIG.
(B) and (C) show the state where the blade body 11 was inclined right and left, respectively. The blade body 1
1 and the detachable fork member 16,
This is the same as the above embodiment.

First, a support shaft 21 is provided so as to protrude substantially below the center of the lower traveling frame 2a in the left-right direction. An oscillating frame 22 having a cylindrical portion 22a through which the support shaft 21 is inserted is disposed close to the lower front of the lower traveling frame 2a, and the oscillating frame 22 has an axial center portion of the cylindrical portion 22a. By rotating around the support shaft 21, it is configured to be able to swing up and down. And the lower traveling body frame 2
The bottom side of the tilt cylinder 20 is rotatably connected via a pin to a tilt cylinder mounting bracket 18a protruding from the upper side surface of the right arm support bracket 18 protruding from the front upper part of FIG. The tip of the rod of the tilt cylinder 20 is attached to a tilt cylinder support bracket 22 b protruding from the upper right end of the swing frame 22.
It is rotatably connected via a pin. Note that the tilt cylinder 20 is attached so as to be parallel to the blade main body 11.

Further, one end of the support arm 12 is rotatably connected via a pin to a pair of left and right arm support brackets 17 'projecting from the front end of the swing frame 22. The other end of the support arm 12 is connected to the arm mounting bracket 1 of the blade body 11 as in the above-described embodiment.
1e is rotatably connected via a pin. The support arm 12 includes two bridge rods 12a 'and 12a'.
a ', and a substantially central portion thereof is connected by an arm support shaft 23. An arm swing block 24 having a cylindrical portion 24a through which the arm support shaft 23 is inserted is interposed between the bridging rods 12a and 12a ', and the arm support shaft 23 rotates around the axis of the cylindrical portion 24a. It is pivotally supported. An elevating cylinder mounting bracket 24b protrudes from the upper end of the arm swing block 24, and the bottom side of the blade elevating cylinder 13 is rotatably connected via a pin. The tip of the rod of the blade lifting cylinder 13 is rotatably connected via a pin to a lifting cylinder support bracket 18 protruding from the upper front surface of the lower traveling frame 2a.

Further, similarly to the above-described embodiment, the bottom side of the snap cylinder 14 is rotatable via a pin to a snap cylinder mounting bracket 11f projecting from the upper surface of the return portion 11a of the blade body 11. It is connected to. The rod end of the snap cylinder 14 is rotatably connected via a pin to a snap cylinder support bracket 19 'projecting from the upper end on the opposite side of the swing frame 22 to which the tilt cylinder 20 is attached. .
That is, as shown in FIG.
, The snap cylinder 14, the support arm 12, and the blade body 11 (shown by a dashed line)
Is inclined. Here, reference numeral 2b indicated by a broken line denotes a crawler traveling device, and its track frame 2c is extended to the lower traveling body frame 2a.

The blade device 10 according to the embodiment having such a configuration can perform the same operation as that of the above-described first embodiment, and can further achieve the following operation. That is, when performing the leveling work, the work on a narrow place, a sloped ground, or the like can be efficiently performed by finely adjusting the inclination of the blade body 11.

In addition, in the transporting operation with the fork member 16 mounted, the relationship between the cargo such as the cargo handling pallet and the machine body often does not coincide with each other. Since the fork member 16 can be moved, an efficient carrying operation can be achieved.

[0045]

As described above, in the blade device of the present invention, a plurality of claw members are provided in a comb shape in the longitudinal direction at the lower portion of the back surface of the blade body. The ground can be leveled by the blade of the blade body in one step, which is efficient.

When the hard ground is slightly shaved and the ground is finished, the blade body can be snap-operated, and the ground can be loosened widely and uniformly with a claw member at a delicate depth (required depth). It is possible to achieve a leveling finish efficiently by pushing and accumulating with the blade body as in the conventional manner.

Furthermore, since the blade main body can be largely snapped, the blade main body can be substantially horizontally inclined, so that the blade main body 11 can be used as a carrier without any attachment. In addition, since a large bed can be made only by inserting a few steel pipes at the site, it is the best transport vehicle at a site with muddy or uneven heights.

[Brief description of the drawings]

FIG. 1 is a side view of an entire hydraulic excavator to which a blade device according to an embodiment of the present invention is mounted.

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

FIG. 3 is a plan view of FIG. 2;

FIG. 4 is a partially oblique rear view of the blade main body of FIG. 2;

FIG. 5 is a side view showing a state where the fork member according to the embodiment of the present invention is mounted.

6 is a front view of the blade main body in FIG.

FIG. 7 is a side view showing a state where a steel pipe according to an embodiment of the present invention is mounted.

FIG. 8 is an explanatory diagram of a situation where a leveling operation is performed in one step while collecting stones.

FIGS. 9A and 9B are explanatory diagrams of a situation in which a solid ground is loosened to perform a leveling operation, wherein FIG. 9A shows a state in which the ground is loosened, and FIG.

FIG. 10 is an explanatory diagram of a work situation for accumulating grass, turf, and the like.

FIG. 11 is an explanatory diagram of a case where the vehicle runs on a steep slope by itself.

FIG. 12 is an explanatory diagram of a situation in which a large object is transported using a bucket.

FIG. 13 is a side view of a blade device according to another embodiment of the present invention.

FIG. 14 is a plan view of FIG.

FIG. 15 is a sectional view taken along line AA of FIG.
Shows a state where the blade body is horizontal, (B) shows a state inclined to the right, and (C) shows a state inclined to the left.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hydraulic excavator 2 Lower traveling body 2a Lower traveling body frame 7 Bucket 10 Blade device 11 Blade main body 11a Returning part 11g Projection 12 Support arm 13 Blade elevating cylinder 14 Snap cylinder 15a Claw member 16 Fork member 20 Tilt cylinder 21 Support shaft 22 Swing Frame 25 steel pipe

Claims (7)

[Claims] 1. A blade main body, one end of which is attached to the other end of a support arm supported on the lower traveling frame so as to be swingable in a vertical direction, and interposed between the support arm and the lower traveling frame. And a plurality of claw members are provided in a longitudinal direction at a lower portion of the back surface of the blade main body, the plurality of claw members being provided in a comb shape. A support shaft protruding substantially at the center of a lower portion of the lower traveling frame so that an axis thereof is directed in the front-rear direction; and a lower front portion of the lower traveling frame, which is turned around the axis of the support shaft. A swing frame movably provided, a blade body attached at one end to the other end of a support arm supported vertically swingably by the swing frame, the support arm and the lower traveling body frame; A blade elevating cylinder interposed therebetween, and interposed between the swing frame and the lower traveling body, for tilting the blade body by tilting the swing frame from side to side, to tilt the blade body. A hydraulic excavator blade device, comprising: a tilt cylinder; and a plurality of claw members provided in a comb-like shape in a longitudinal direction of a lower surface of a back surface of the blade body. Apparatus. 3. The blade body is attached to the support arm so as to be vertically rotatable, and a snap cylinder for snap-operating the blade body is provided on an upper back surface of the blade body and the lower traveling body. The blade device for a hydraulic shovel according to claim 1, wherein the blade device is provided between the blade and the frame. 4. The apparatus according to claim 1, wherein the blade body is rotatably attached to the support arm in a vertical direction, and a snap cylinder for snap-operating the blade body includes an upper back surface of the blade body and the swing frame. 3. The blade device for a hydraulic shovel according to claim 2, wherein the blade device is provided between the blade device. 5. The blade device for a hydraulic shovel according to claim 1, wherein a detachable fork member is attached to the blade body. 6. The excavator according to claim 1, wherein an upper end portion of the blade body is formed to have a return portion projecting obliquely forward and upward. Blade equipment. 7. The blade device for a hydraulic shovel according to claim 1, wherein a plurality of projections for mounting a steel pipe are provided at appropriate places on the front surface of the blade body.