JPH09195221A - Road surface cutting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutting machine capable of cutting the peripheral part or part close to the shoulder of a manhole. SOLUTION: The mounting member 20 of a road surface cutting device is mounted on the tip part of an arm 6, a motor mounting member 30 is mounted on the mounting member 20 through a cushioning mechanism 31, a hydraulic motor 50 is mounted on the motor mounting member 30, and a cutting member 90 having a plurality of cutting edge 96 is rotated by the hydraulic motor 50. The cutting member 90 is rotated by the hydraulic motor 50 while vertically rocking the arm 6 and a boom, whereby a road surface is cut by the cutting edges 96.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a road surface cutting machine for cutting road surfaces such as roads, bridge surfaces and sidewalks paved with asphalt or cement concrete into flat surfaces.

[0002]

2. Description of the Related Art Road surfaces of roadways have been used for many years, resulting in ruggedness and unevenness, and cracks. Therefore, road surface repair work of cutting a road surface into a flat surface, or cutting and removing a pavement portion and paving again. Is being done.

As a machine for cutting a road surface, there is known a machine called a road cutter in which a drum-type road surface cutting device is vertically mounted on a vehicle body and the road surface cutting device cuts the road surface while traveling on the vehicle body.

[0004]

The above-mentioned road cutter, which is called a road cutter, cuts a road surface while traveling. The road surface cutting device has a cutting blade mounted on a drum rotating about a horizontal axis. Therefore, it is not possible to cut around the manhole or near the shoulder.

Therefore, the peripheral portion of the manhole and the road shoulder portion, which could not be conventionally cut, are manually removed by a worker by using a compressor and a breaker, which is very troublesome and takes a long time. As a result, the work efficiency is poor, and the noise of the compressor and the noise of the chipper due to the breaker are large, which is a problem as noise pollution.

Therefore, an object of the present invention is to provide a road surface cutting machine capable of solving the above-mentioned problems.

[0007]

The first aspect of the present invention provides
A machine body 2 rotatably provided on the traveling body 1, a boom 4 provided on the machine body 2 so as to be vertically swingable, and a boom 4
An arm 6 provided to be able to swing up and down, and a road surface cutting device A attached to the arm 6.
A mounting member 20 mounted on the arm 6, a hydraulic motor 50 mounted on the mounting member 20 via a buffer mechanism 31, and a cutting member 9 rotated by the hydraulic motor 50.
It is a road surface cutting machine characterized by comprising 0 and.

According to the first invention, the boom 4 and the arm 6 are provided.
Swing up and down to bring the road surface cutting device A to a substantially vertical posture,
The hydraulic motor 50 can cut the road surface while rotating the cutting member 90. Further, by swinging the boom 4 and the arm 6 up and down or turning the machine body 2, the road surface cutting device A can be moved in any direction along the road surface while the traveling body 1 is stopped. It is possible to cut the peripheral part and the road shoulder part. Further, since the impact force in the rotational direction generated during cutting by the cutting member 90 is absorbed by the cushioning mechanism 31 and is not transmitted to the mounting member 20, the impact force in the rotational direction described above causes the arm 6 and the boom 4 to swing to the left and right, and the metal. It is possible to prevent the squeaking noise from being generated.

A second aspect of the present invention is a road surface cutting machine in which the cutting member 90 of the first aspect of the present invention has a plurality of cutting blades 96 that are substantially radial and are directed obliquely downward.

According to the second invention, the road surface can be cut by pressing the cutting blade 96 against the road surface.

A third aspect of the present invention is the cushioning mechanism 31 according to the first and second aspects of the invention, and a cushioning member 32 having a first mounting plate 37 and a second mounting plate 38 fixed to the upper and lower surfaces of the cushioning body 36. Between the mounting member 20 and the hydraulic motor 50,
It is a road surface cutting machine in which a plurality of hydraulic motors are attached along a circular locus around the rotation center of the hydraulic motor.

According to the third aspect of the invention, the shock absorbing force in the rotational direction is absorbed by the plurality of shock absorbing members 36, so that the durability of the shock absorbing member 36 can be improved.

According to a fourth aspect of the invention, a cylindrical rotor 64 is rotatably attached to the motor case 51 of the hydraulic motor 50 of the first and third inventions, and the rotor 64 is inside the rotor 64. And a shaft 53 of the hydraulic motor 50 is provided with a speed reducing mechanism 66, one axial end of the cylindrical cutting member body is attached to the axially intermediate portion of the rotating body 64, and the other axial end of the cutting member body is attached. This is a road surface cutting machine in which a plurality of cutting blades 96 are attached to the outer surface to form a cutting member 90.

According to the fourth aspect of the invention, since the cutting member body of the cutting member 90 is attached to the rotating body 64, and the rotating body 64 is supported by the motor case 51 of the hydraulic motor 50, the cutting member 90 is strong. The cutting member 90 does not sway due to the cutting reaction force of the cutting blade 96 that is supported by. Further, since the speed reducing mechanism 66 is provided in the rotating body 64 and the rotating body 64 projects into the cutting member body, the hydraulic motor 5
The dimension between 0 and the cutting blade 96 is small, and the road surface cutting device A becomes compact.

A fifth aspect of the present invention is a road surface cutting machine in which the cutting blade 96 of the fourth aspect of the present invention is mounted in a substantially radial and obliquely downward direction to form a cutting member 90.

According to the fifth invention, the plurality of cutting blades 96 can be cut by pressing the road surface.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION

(Overall Structure of Road Surface Cutting Machine) As shown in FIG.
The machine body 2 is pivotally mounted on the machine body 2 by a revolving mechanism 3, and a boom 4 is mounted on the machine body 2 so as to be able to swing up and down by a boom cylinder 5. It is movably mounted.
A working machine cylinder 8 is attached to the arm 6.
The first rod 1 is attached to the piston rod 9 of the working machine cylinder 8.
0 and the second link 11 are connected by a pin, and the first link 10 is connected to the arm 6 by a pin.

The above structure is similar to that of the main body of the power shovel, and a bucket is attached to the tip of the arm 6 by the working machine cylinder 8 so as to be vertically swingable to form a power shovel. In the example, the road surface cutting device A is attached to the tip of the arm 6 by a working machine cylinder 8 so as to be vertically swingable to form a road surface cutting machine.

(Specific Structure of Road Surface Cutting Device A) The road surface cutting device A is provided with a mounting member 20 for mounting on the arm 6, as shown in FIGS. 2, 3 and 4. The mounting member 20 has a pair of vertical plates 22 on the upper surface of a disk-shaped horizontal plate 21.
Are parallel to each other and fixed at intervals. A first pin hole 23 and a second pin hole 24 are formed near the upper part of each vertical plate 22, and a circular hole 25 is formed between the pair of vertical plates 22 in the horizontal plate 21.

A plate-shaped reinforcing member 26 is fixedly provided between the upper and lower intermediate portions of the pair of vertical plates 22, and each vertical plate 22 and the horizontal plate 21.
A reinforcing vertical rib 27 is fixed over the entire surface.

A pair of vertical plates 22 of the mounting member 20 are shown in FIG.
Shown in FIG. 2A and 2B, respectively, facing both side surfaces of the arm 6 and both side surfaces of the second link 11, and fitting the first pin 28 across the first pin hole 23 and the arm 6 to connect the pair of vertical plates 22 and the arm 6. Then, the second pin 29 is fitted over the second pin hole 24 and the second link 11 to connect the pair of vertical plates 22 and the second link 11.

Because of this, the arm 6, the second link 11 and the mounting member 20 can be easily connected by fitting the first pin 28 and the second pin 29, and the first pin 28 and the second pin 29 can be connected. It can be easily removed by pulling out 29, and the road surface cutting device A can be attached to and removed from the arm 6 in the same manner as a bucket.

A plate-shaped motor mounting member 30 is mounted on the lower surface of the horizontal plate 21 of the mounting member 20 via a buffer mechanism 31. The buffer mechanism 31 has a plurality of buffer members 32 arranged along a substantially circular locus as shown in FIG.
As shown in FIG. 7, the buffer member 32 is a rectangular metal plate 33 having a rectangular parallelepiped shape made of an elastic material on the upper and lower surfaces thereof.
A buffer 36 to which the buffer 34 and the second buffer 35 are respectively fixed by sintering; a first mounting plate 37 made of metal fixed to the first buffer 34 by sintering;
5 is a second mounting plate 38 made of metal fixed by sintering.
Consisting of

The first mounting plate 37 includes a lateral piece 39,
One vertical piece 40 integrally provided on one side edge of the horizontal plate 39
And a hook-shaped other vertical piece 41 provided integrally with the other side edge of the horizontal plate 39 to form a substantially downward U-shape. Specifically, one plate is bent and its horizontal piece 3
A mounting bolt 42 is fixed to 9.

The second mounting plate 38 includes a lateral piece 43,
Hook-shaped vertical piece 4 integrally provided on one side edge of this horizontal piece 43
4 make it almost L-shaped. Specifically, one plate is bent, and a mounting bolt 45 is fixed to the lateral piece 43.

A vertical piece 40 on one side of the first mounting plate 37.
As shown in FIG. 8, the buffer member 36 faces one side surface 36 a of the buffer member 36 with a gap, the vertical piece 44 of the second mounting plate 38 faces the other side surface 36 b of the buffer member 36, and the first mounting plate 37.
The one vertical piece 41 and the vertical piece 44 of the second mounting plate 38 are folded when the bent pieces 41a and 44a face each other and the first mounting plate 37 and the second mounting plate 38 move relatively in the vertical direction. The bending piece 41a and the bending piece 41b are in contact with each other.

As shown in FIGS. 2, 3 and 5, the cushioning member 32 is sequentially arranged upside down along a circular locus around a rotation center of a hydraulic motor, which will be described later, and the first mounting plate. 37 mounting bolt 42 and second mounting plate 3
The mounting bolt 45 of No. 8 is inserted into the through-holes of the horizontal plate 21 of the mounting members 21 and 20 and the motor mounting member 30, and the nut 46 is inserted.
Can be attached by screwing.

A hydraulic motor 50 having a speed reducer is attached to the central portion of the motor attachment member 30. As shown in FIG. 9, in the hydraulic motor 50, a cylinder block 52 is rotatably provided in a motor case 51 together with a shaft 53, and a plurality of cylinder holes 5 of the cylinder block 52 are provided.
4, a piston 55 is inserted into the cylinder chamber 56,
The piston 55 is a swash plate type hydraulic motor that moves along the swash plate 57.

The motor case 51 is a housing 51a.
And an end port 51 for supplying pressure oil into the cylinder chamber 56 to the end cover 51b.
8. An outlet port 59 for discharging the pressure oil in the cylinder chamber 56 to the tank is formed.

An annular mounting surface 60 is provided on the housing 51a.
Is formed, and this annular mounting surface 60 is
A hydraulic motor 50 is mounted on the motor mounting member 30 by screwing a bolt 61 into a bolt hole 62 in contact with the lower surface of the motor. The housing 51a of the motor case 51 projects above the hole 63 of the motor mounting member 30 and the hole 25 of the horizontal plate 21 of the mounting member 20, and is located between the pair of vertical plates 22.

Housing 51a of the motor case 51
A cylindrical rotary body 64 is rotatably mounted on the outer peripheral surface of the rotary body 64. A mounting flange 65 is integrally provided at an axially intermediate portion of the outer circumferential surface of the rotary body 64. The rotating body 64 is connected to the shaft 53 of the hydraulic motor 50 via a speed reducer 66.

As shown in FIGS. 9 and 10, the speed reducer 66 has a ring gear 67 fitted and fixed to the inner peripheral surface of the rotating body 64, and a first gear 68 meshing with the ring gear 67.
It comprises a second gear 69, three rotating shafts 70 for rotating the first gear 68 and the second gear 69, a driven gear 71 attached to the rotating shaft 70, and a driving gear 72 attached to the shaft 53. .

The ring gear 67 has a large number of pins 67a fixed to the inner peripheral surface of the rotating body 64.
Are the teeth. The housing 51a is integrally provided with three protrusions 73, and a plate 74 is attached to each of the protrusions 73 with bolts 75. The first gear 6
8 and the second gear 69 have three window portions 76 and three holes 77 that fit into the respective projections 73.
The number of the tooth portions 68a, 69a of the gear 69 depends on the ring gear 6
One less than the number of seven teeth.

Both ends of the rotary shaft 70 are provided with a housing 51.
a and the second eccentric portion 7 are rotatably supported by the first eccentric portion 78 and the second eccentric portion 7 and are 180 degrees out of phase at the intermediate portion.
9, the first eccentric portion 78 of which is provided with a hole 77 of the first gear 68.
And a second eccentric portion 79 is supported in the hole 77 of the second gear 69 via the bearing 80.

Therefore, when the shaft 53 of the hydraulic motor 50 rotates, the rotary shaft 70 rotates via the drive gear 72 and the driven gear 71, whereby the first gear 68 and the second gear 68 are rotated.
Since the gear 69 rotates eccentrically 180 degrees out of phase to rotate the ring gear 67, the rotating body 64 is rotated. The rotating speed of the rotating body 64 is significantly lower than the rotating speed of the shaft 53, and the rotating body 64 rotates at a reduced speed.

As shown in FIGS. 2 and 3, a cutting member 90 is attached to the rotating body 64. The cutting member 90 is a tubular cutting member body including a tubular body 93 having a mounting flange 91 and a mounting flange 92, and a cutting blade mounting body 95 mounted on the mounting flange 92 of the tubular body 93 with a bolt 94, and It comprises a plurality of cutting blades 96 mounted on the outer surface of the cutting blade mounting body 95 substantially radially, and an auxiliary cutting blade 97 mounted on the lower surface of the cutting blade mounting body 95.

The mounting flange 91 is mounted on the mounting flange 65 of the rotating body 64 with bolts, and the cutting member 90 rotates together with the rotating body 64 to cut the road surface by the cutting blade 96 and the auxiliary cutting blade 97. .

The cutting blade 96 has a bit 99 mounted on a bit holder 98, and the bit holder 98 is fixed to the outer surface of the cutting blade mounting body 95 by welding or the like. As shown in FIG. 6, the bit 99 is in an inclined posture with respect to the radial direction in the rotation direction, and is in a downwardly inclined posture with respect to the horizontal direction as shown in FIGS. 2 and 3.

Specifically, as shown in FIG. 6, the center of rotation B
The center line D of the bit 99 is inclined by α degrees in the rotation direction with respect to the radial straight line C passing through, and the center line D of the bit 99 is inclined downward by β degrees with respect to the horizontal line E as shown in FIG. There is.

The auxiliary cutting blade 97 has a bit 99 mounted vertically on the lower surface of the cutting blade mounting body 95.

Next, the road surface cutting operation will be described. Boom 4,
With the arm 6 in the posture shown in FIG. 1, the road surface cutting device A is in a substantially vertical posture, and the rotating body 64 is rotated by the hydraulic motor 50 to rotate the cutting member 90.

In the above-mentioned state, the arm 4 is swung downward, the cutting blade 96 and the auxiliary cutting blade 97 are pressed against the road surface, the road surface is cut into a ring shape by the plurality of cutting blades 96, and the cutting portion of the ring shape is cut. The inside road surface is cut by the auxiliary cutting blade 97.

As described above, while cutting the road surface, the machine body 2 is swung, the boom 4 and the arm 6 are vertically swung, and the road surface cutting device A is moved along the road surface to move the road surface within a predetermined range. After cutting, the boom 4 is swung upward, the cutting blade 96 and the auxiliary cutting blade 97 of the road surface cutting device A are separated from the road surface, and the machine body 2 is run by the running body 1, and then the above-described operation is performed. Repeat.

When the road surface is cut as described above, since the bit 99 of the cutting blade 96 is in an inclined posture in the rotational direction with respect to the radial direction and in a downward posture with respect to the horizontal direction, Can be cut efficiently, and the road surface can be cut efficiently while moving the road surface cutting device A along the road surface. The road surface cutting device A cuts the road surface while moving in the direction in which the bit 99 is facing.

The cutting reaction force when cutting the road surface while the bit 99 of the cutting blade 96 rotates is transmitted to the motor mounting member 30 via the rotating body 64, the reduction mechanism 66, the shaft 53, and the motor case 51, and is buffered. Since it is transmitted to the mounting member 20 via the mechanism 31, the cutting reaction force is eventually supported by the traveling body 1 via the arm 6, the boom 4 and the machine body 2.

For this reason, when the bit 99 collides with a projection on the road surface or the like to generate an impact force in the rotational direction, the arm 6 and the boom 4 may swing left and right, and a metallic squeak noise may be generated.

However, since the motor mounting member 30 and the lateral plate 21 of the mounting member 20 are connected via the buffer mechanism 31, the impact force in the rotating direction is absorbed by the buffer mechanism 31. As a result, as described above, the arm 6 and the boom 4 do not swing right and left, thereby preventing the occurrence of a metallic noise.

Since the cushioning mechanism 31 comprises a plurality of cushioning members 32 each having a cushioning body 36 arranged at intervals along a circular locus, the above-mentioned impact force in the rotational direction is imparted to the plurality of cushioning bodies 36. Can be surely absorbed.

Moreover, the buffer member 32 is the hydraulic motor 5
Since the outer peripheral portion of the hydraulic motor 50 is arranged at intervals along the circular locus, the distance from the rotation center of the hydraulic motor 50 to each buffer member 32 is long, and the impact force acting on one buffer 36 is small. Therefore, the durability of the buffer 36 can be improved, and even a large impact force can be absorbed.

When the shock absorber 36 of the shock absorber 32 is sheared or the first shock absorber 34 and the second shock absorber 35 are separated from the plate 33 to separate the mounting member 20 and the motor mounting member 30, Bending piece 41 of the other side vertical piece 41 of the mounting plate 37
a and the bent piece 44a of the vertical piece 44 of the second mounting plate 38 are opposed to each other in the up-down direction, so that when the mounting member 20 is lifted, the bent piece 41a and the bent piece 44a come into contact with each other and the motor mounting member 30 Is lifted.

Therefore, as described above, when the mounting member 20 and the motor mounting member 30 are separated, the boom 4 can be swung upward to lift and carry the road surface cutting device A.
It is convenient.

Further, the motor case 51 of the hydraulic motor 50
Annular mounting surface 60 of the housing 51a (the hydraulic motor 50).
Is attached to the motor mounting member 30, and the end cover 51b of the motor case 51 (one axial end of the hydraulic motor 50) is inserted through the hole 63 of the motor mounting member 30 into a pair of longitudinal members of the mounting member 20. Since it projects between the plates 22, the dimension from the mounting member 20 to the cutting blade 96 becomes short, and the overall length of the road surface cutting device A becomes short and compact.

Further, the rotating body 64 is rotatably supported on the outer peripheral surface of the housing 51a of the motor case 51, the speed reducing mechanism 66 is provided inside the rotating body 64, and the outer periphery of the rotating body 64 is provided. The cylindrical body 9 of the cutting member body is attached to the mounting flange 65 provided at the intermediate portion in the axial direction of the plane.
Since the upper part 3 is attached and the rotary body 64 projects into the cylindrical body 93, the hydraulic motor 50 and the cutting blade 9 of the road surface cutting device A are
6, the cutting member 90 is firmly supported by the housing 51a of the motor case 51 of the hydraulic motor 50 via the rotating body 64, and the cutting member 90 may fluctuate due to cutting resistance during road surface cutting. Alternatively, the output torque of the hydraulic motor 50 can be reliably transmitted to the cutting member 90.

Next, a second embodiment of the road surface cutting device A will be described. As shown in FIGS. 11, 12, and 13, the motor mounting member 30 is formed by connecting the upper horizontal plate 30a and the lower horizontal plate 30b with a plurality of connecting members 30c. The plates 21 are connected by a buffer mechanism 31,
An annular mounting surface 60 of the housing 51a of the motor case 51 of the hydraulic motor 50 is connected to the lower horizontal plate 30b with bolts.

In the above description, the cutting of the road surface is described, but if the road surface cutting device A is placed in a substantially horizontal posture or an obliquely upward posture by swinging the boom 4 and the arm 6 upward, the side wall of the tunnel or the like is cut. it can.

Although the power shovel is used in the above-mentioned embodiments, the machine body is mounted on the body of an on-road truck or a groove excavator mounted on the rear of the car body such as a bulldozer, a dozer shovel, and a wheel loader. Needless to say, a road surface cutting device may be attached to the arm of a groove excavator to which is freely rotatable.

[Brief description of the drawings]

FIG. 1 is an overall front view of a road surface cutting machine showing an embodiment of the present invention.

FIG. 2 is a partially cutaway front view of the road surface cutting device.

FIG. 3 is a side view of the road surface cutting device.

FIG. 4 is a plan view of the road surface cutting device.

5 is a sectional view taken along line aa of FIG.

6 is a cross-sectional view taken along the line bb of FIG.

FIG. 7 is an exploded perspective view of a cushioning member.

FIG. 8 is a front view of a cushioning member.

FIG. 9 is a sectional view of a hydraulic motor.

10 is a sectional view taken along line cc of FIG.

FIG. 11 is a partially cutaway front view showing a second embodiment of the road surface cutting device.

FIG. 12 is a side view showing a second embodiment of the road surface cutting device.

FIG. 13 is a sectional view taken along line dd of FIG.

[Explanation of symbols]

1 ... running body, 2 ... machine body, 4 ... boom, 6 ... arm,
Reference numeral 20: mounting member, 30: motor mounting member, 31: buffer mechanism, 32: buffer member, 36: buffer body, 37: first mounting plate, 38: second mounting plate, 50: hydraulic motor,
50 ... Motor case, 53 ... Shaft, 64 ... Rotating body, 66 ...
Reduction mechanism, 90 ... Cutting member, 93 ... Cylindrical body, 95 ... Cutting blade mounting body, 96 ... Cutting blade, 97 ... Auxiliary cutting blade.

Claims (5)

[Claims] 1. A machine body 2 rotatably provided on a traveling body 1.
And a boom 4 provided on the machine body 2 so as to be able to swing up and down.
And an arm 6 provided on the boom 4 so as to be swingable up and down;
A road surface cutting device A attached to the arm 6, an attachment member 20 attached to the arm 6 and the hydraulic motor 50 attached to the attachment member 20 via a buffer mechanism 31; A road surface cutting machine comprising a cutting member 90 rotated by the hydraulic motor 50. 2. The road surface cutting machine according to claim 1, wherein the cutting member 90 has a plurality of cutting blades 96 which are substantially radial and are directed obliquely downward. 3. A cushioning member 32 having a first mounting plate 37 and a second mounting plate 38 fixed to the upper and lower surfaces of the cushioning body 36.
The road surface cutting machine according to claim 1 or 2, wherein a plurality of are mounted between the mounting member 20 and the hydraulic motor 50 along a circular locus around the rotation center of the hydraulic motor 50 to form a buffer mechanism 31. 4. A motor case 51 of the hydraulic motor 50.
A cylindrical rotating body 64 is rotatably attached to the rotating body 6
4, inside the rotating body 64 and the shaft 53 of the hydraulic motor 50.
And a plurality of cutting blades 96 are attached to the outer surface of the other end of the cutting member body in the axial direction. The road surface cutting machine according to claim 1 or 3, wherein a cutting member 90 is attached. 5. The road surface cutting machine according to claim 4, wherein the cutting blades 96 are mounted substantially in a radial shape and obliquely downward.