JP2001323413A - Three-wheel surface chipping machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a three-wheeled surface chipping machine capable of uniformly chipping off deeply without missing, and easily controlling the depth of chipping, and suitable for chipping off pavement such as asphalt with little missing. SOLUTION: This three-wheeled surface chipping machine is provided with a whole wheel drive type three-wheeled drum-like rotary blade which can be easily removably mounted on the tip part of a back hoe instead of a standard shovel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-wheel surface grinder, and more particularly to a corner or small area for scraping a surface such as an asphalt pavement, a synthetic resin pavement, a mortar wall, a frozen pavement, and a freezer floor. The present invention relates to a three-wheel surface grinder excellent in surface grinding.

[0002]

2. Description of the Related Art Conventionally, local scraping work of asphalt pavement has been performed mainly by an operator directly using an air breaker or a hydraulic breaker or the like, but each of these breakers has a chisel at a tip portion. This is a mechanism that reciprocates a kind of hard metal flea called pneumatically or hydraulically. Therefore, the noise is intense, the working environment is bad due to the generation of dust and the like, and the physical fatigue of the worker is severe.

[0003] In addition, local cutting of asphalt or mortar pavement such as flooring cutting work is particularly difficult, and mechanization has been strongly desired.

[0004] Therefore, a grinder using a vertical-shaft rotating disk-shaped rotary blade or a fixed-shaft drum-shaped rotary blade has been developed and put to practical use.

[0005] However, the former is extremely dangerous because the fragments fly in the horizontal tangential direction due to centrifugal force.
The latter has a problem in that, for example, the driver of the backhoe cannot easily see the state of the cutting edge of the rotary blade temporarily stopped from the driver's seat because of the fixed shaft although the latter has low noise. Further, when the rotating shaft of the drum type rotary blade is a fixed shaft, it is extremely difficult to cut off a narrow or wide angle corner in particular. Further, when the work surface is covered by the overhang, there is a problem that the drum-shaped rotary blade cannot access the work surface.

Accordingly, the present inventors have made the rotation axis of the drum-shaped rotary blade 360 ° rotatable around the axis of rotation perpendicular to the axis, and made the drum-shaped rotary blade offsettable. Furthermore, by arranging two drum-shaped rotary blades forward and backward in an isosceles triangular shape in a plane, it was found that these problems could be solved at once, and as a result of various experimental studies, the present invention was completed. I came to.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to enable a driver such as a backhoe (hydraulic shovel) manipulator or the like to rotate or temporarily stop a rotating blade while sitting in a driver's seat to check the situation, and to provide a ceiling and a wall. The object of the present invention is to provide a surface cutting machine capable of following a small or wide angle corner of a surface to be cut such as a slope, a horizontal surface, etc., and capable of obtaining a low noise and beautiful finished surface. .

In addition, even when the edge of the work surface is covered by an overhanging obstacle, and the surface grinder is difficult to approach the work surface in the conventional apparatus, even if it is difficult to access the work surface, it is possible to offset from the rotation axis in the perpendicular direction. The surface cutting work can be performed by the rotated blade.

[0009]

The present invention drives two substantially parallel drum-shaped rotary blades which are cantilevered by a front inner bearing, one drum-shaped rotary blade which is pivotally supported rearward, and each drum-shaped rotary blade. A three-wheel surface scraper, comprising: a drive system for driving the motor; and a frame having a hydraulic motor, the trimmer surface cutter being detachably fixed to the arm tip of the backhoe, and each drum-shaped rotary blade. A base having a mounting bracket for pivotally supporting the frame via a rotation / fixing mechanism capable of being fixedly rotated by 360 ° about an upper rotation axis substantially perpendicular to a plane including the support shaft of the first embodiment. The three-wheel surface scraper according to claim 2, wherein the drum-shaped rotary blades are arranged in a row or spiral on the outer surface of the drum along the rotation axis, and the longitudinal fixing angle θ of each bit is set in the tangential direction of the drum. On the other hand, 30 ° -6
The three-wheel surface scraper (claim 3) according to claim 1 or 2, which is a drum-shaped rotary blade aligned at 0 °, wherein the rotating / fixing mechanism is fixed horizontally on an upper portion of a frame supporting the drum-shaped rotary blade. A rotation mechanism including a large-diameter gear coaxial with the rotation shaft, a pinion meshing with the large-diameter gear, and a hydraulic motor fixed to a base with a mounting bracket for driving and pivoting the pinion; 4. A three-wheel surface scraper according to claim 2, wherein the turning and fixing mechanism comprises a fixing mechanism having a number of holes provided along the peripheral portion of the radial gear and pins fitted into these holes. (Claim 4) The three-wheel surface scraper according to any one of claims 1 to 4, wherein the target surface is any one of asphalt pavement, synthetic resin pavement, mortar wall, iced pavement, and freezer floor. 5) and mounting bracket bottom plate and / or A plurality of long holes are formed in the upper plate portion of the frame along the rotary blade axis direction, and the lower plate portion of the mounting bracket and the upper plate portion of the frame are bolted and / or stud and nut and / or bolt and nut. The three-wheel surface scraper (claim 6) according to any one of claims 1 to 5, which is fastened so that the drum-shaped rotary blade can be moved and adjusted in the axial direction.

Hereinafter, the present invention will be described in detail with reference to embodiments.

[0011]

FIG. 1 is a side view showing an embodiment in operation, FIG. 2 is a perspective view of the embodiment, FIG. 3 is a side view of a main portion of a rotary blade, and FIG.
FIG. 5 is an enlarged sectional view of a rotating / fixing mechanism, FIG. 6 is a sectional view of a main part of FIG. 5, and FIG. 7 is an embodiment (FIGS. 1 and 2).
2 and 4), FIG. 8 is a cross-sectional view showing an extension of the rotary blade support shaft, FIGS. 9 and 10 are plan views showing the mounting state of the mounting bracket lower end plate and the frame upper end plate, respectively. It is the top view offset.

1 to 10, 1 is an embodiment, 2 is a frame, 2A is a plate member at the upper end of the frame, 4, 5 are front drum-shaped rotary blades (front wheels), and 6 are rear drum-shaped rotary blades (rear wheels). 4A, 5A and 6A are drum surfaces of each rotary blade, 7 is a hydraulic hose, 8 is a front bearing, 8A is a bearing, 8B is a front shaft extension, 8C is a screwed portion, 8D is a lock pin, and 9 is a mounting bracket. , 9A is a lower plate portion of the mounting bracket, 10A is a hydraulic motor for driving the front wheels, 10B is a hydraulic motor for driving the rear wheels, 1
1 is a vertical shaft, 11A is a hydraulic motor for rotating a vertical shaft,
13 is a pin, 15 is a sprocket and chain, 16 is a chain cover, 20 is a center line, 21 is a long hole, 22 is a bolt head (or nut), 24 is a large diameter gear, 24A is a pin groove, and 24C is a large diameter gear. Cover, 25 are movable pins, 2
6 is a hydraulic cylinder, 27 is a pinion gear, 27C is a pinion gear cover, 30A and 30B are sleds, 31 is a bit, 32 is a bit support, 33 is a bit hard part, 39 is a key, R is a drum radius, and S is a bit. Axis, T is tangential direction (tangential direction), AM is backhoe arm tip, F
W is forward, RV is reverse, 59 is a rotation / fixing mechanism, 100
Denotes a work surface (target surface), and 101 denotes a work piece.

Referring to FIGS. 1, 2, and 4, the three-wheel surface scraper according to the embodiment of the present invention can be easily attached to and detached from the tip AM of the backhoe arm by the pins 2 and 2. 4 and 8
In the lower part of the upper end frame 9, a large-diameter gear 24, a pinion 27 and a hydraulic motor 11A for driving the pinion 27 shown in FIG. Rotation axis 11 of diameter gear
A rotation fixing mechanism 59 mainly composed of a pin 25 which moves up and down in the direction and is detachably mounted in the groove 24A in the Y direction is mounted (see FIG. 6).

The rotation fixing mechanism 59 is not limited to this embodiment, but may be a pneumatic motor or an electric motor in addition to the hydraulic motor. The pinion and the large-diameter gear may be helical gears. Further, the stop mechanism may be a pneumatic cylinder, a solenoid, or an electric ball screw instead of the hydraulic cylinder, and the pin and the pin groove may be a ball head pin and a spherical groove, and the pin groove may be a rim portion of a large diameter gear. Alternatively, it may penetrate the spoke portion. Further, it may be used in combination with a disc brake, a drum, and a band brake.

A mounting bracket 9 is fixed and suspended below the mounting shaft 9 by a rotating shaft 11 fixed to a large-diameter gear 60 by a key 39, and a frame (a base with a mounting bracket) 2 is mounted below the mounting bracket 9. Is fixed, that is, by rotating the rotating shaft 11 by the hydraulic motor 11A, the three-wheel surface grinder main body 1 can be rotated by 360 °. Naturally, the rotating shaft 11 is pivotally attached to a substantially central portion of the lower plate portion 9A of the upper mounting bracket through a thrust bearing and a radial bearing or a radial bearing with a taper (also used as a thrust bearing). In this case, a roller bearing is generally used to support a large load.

Although such a rotating and fixing mechanism is convenient but complicated and expensive, it may be omitted as shown in FIGS. This is because, in the case of a small size, even if the rotation / fixing mechanism is omitted, the direction of the three-wheel surface grinder can be easily adjusted by moving the backhoe itself.

Next, as shown in FIGS. 1, 2 and 3, the main body of the three-wheel surface grinder is a pair of bearings 8A, 8A (tapered roller bearings) fixed to the lower portion of the inverted U-shaped frame 2.
, And is mainly composed of a front drum-shaped rotary blade 45 and a rear drum-shaped rotary blade 6 which are pivotally mounted in a substantially horizontal and parallel manner. The drive system of the rotary blade is shown in Figs.
9, a horizontal shaft hydraulic motor 10A, 10A, a sprocket, chains 15, 15, and a tensioner (not shown). The sprocket and chain are covered with a chain cover 16 for safety and protection.

A large number of movable pits 31 are fixed on the surfaces of the drum-shaped rotary blades 4, 5, 6 in a row or spiral. Spiral arrangement of bits prevents a large number of bits from simultaneously abutting against the target surface such as a pavement surface, so that the biting torque becomes too large to prevent shortage of driving torque or breakage of the driving system, and to provide a beautiful finished surface. Although it can be obtained, the necessity is not so large for a relatively soft work surface.

As shown in FIG. 2 or FIG. 4, the bit 31 is movably fitted with a slight gap on a bit support 32 fixed or welded to the drum surface 4A in a spiral or row. It is important that the longitudinal direction of the bit is arranged substantially at an angle θ (30 ° to 60 °) with respect to the tangential direction of the drum (see FIG. 3).

If the angle θ is less than 30 °, the bit does not bite into the target surface, so that the drum-shaped rotary blade 4,
Bits 5 and 6 become difficult to rotate, and uneven wear of the bit tends to progress. If the angle θ exceeds 60 °, the bit hits the target surface and the vibration / noise becomes intense. For that reason, the surface is not effectively removed or the rotation torque is increased. This is because the finished surface is not beautiful. Therefore, 30 ° ≦ θ ≦ 60 °.

A high-speed steel or ceramic hard layer is applied to the tip 33 of the movable play bit 31 so that it does not wear easily and the bit itself moves slightly, so that it is optimal for the target surface. Abutment at corners, effective cutting.
The drum peripheral speed was 60 to 200 m / min. The finished groove width (interval in the bit width direction) is preferably about 0.5 to 3.5 cm. The drum peripheral speed is 60 m / min. If it does not reach 200 / min., The working speed is too slow and impractical. If it exceeds 60 m / min., Noise tends to increase slightly and biting tends to be insufficient. Is good. If the finished groove width is smaller than 0.5 cm, it will be difficult to obtain adhesion during the subsequent surface treatment, and if it exceeds 3.5 cm, it will be too coarse and it will be difficult to obtain smoothness of the re-paved layer.

The direction of rotation of the drum is, as shown in FIG. 1, a direction of scooping up with respect to the traveling direction of the three-wheel surface scraper (arrow R), that is, up cut (the direction of arrow W counterclockwise in FIG. 1).
It is. Experience has shown that this is better.
That is, in the case of the opposite down cut, the vertical vibration becomes intense,
Although it cannot be cut well, up cut does not have it and can cut smoothly. Therefore, there is a merit that the working state of the embodiment is more easily seen from the driver when the operation direction is the R direction. In a simple embodiment, the reversing mechanism of the drum is omitted.

Although the traveling direction of the embodiment is usually the RV direction, it can be advanced in the FW direction depending on the properties of the target surface. The rotation direction of the drum-shaped rotary blade is often fixed in the W direction, but it is of course possible to reverse the rotation.

In addition, three height-adjustable sleds 30A, 30B, 30B for adjusting the shaving thickness are provided at the lower end of the inverted U-shape shaving machine. In the case of FIGS. 1, 2, and 4, the height adjustment is performed by a large number of bolts and bolts 31, 31,. Arrow RV
The movement of the cutter 1 in the direction is performed by moving the arm of the backhoe or retreating the backhoe itself.

In the rotation type embodiment as shown in FIG. 4, the surface scraping operation can also be performed by rotating the embodiment while rotating the arm of the backhoe. The vertical position of the sled can be remotely controlled by a hydraulic cylinder. In that case, the cutting depth can be freely controlled within a certain range.

The three work surfaces in the width direction of the drum-shaped rotary blade may or may not overlap each other. The cutting depth can be adjusted by adjusting the height of the sled near the drum-shaped rotary blade. However, it is desirable to make a slight difference between the cutting depth of the drum-shaped rotary blade 6 and that of the drum-shaped rotary blade 4 or 5 to make the desired cutting operation. Can be performed.

When the drum-shaped rotary blades are added in the width direction of the drum-shaped rotary blades 4 and 5, the lock shaft 8D and the threaded portion 8C are used to connect the front shaft extension 8B to the front shaft as shown in FIG. And further mounting another drum-shaped rotating part thereon.

Referring to FIGS. 9 and 10, in this embodiment, all the long holes 21 extending in the axial direction of the drum-shaped rotary blade are provided in the lower plate portion 9A of the mounting bracket, and bolts 22 are inserted through these long holes. The mounting bracket 7 and the frame 8 are tightened and fixed so that the position can be adjusted (offset) in the rotation axis direction of the drum-shaped rotary blade by screwing into a bolt screw hole provided in the frame upper plate 2A. However, the long hole 35 may be provided on the upper end plate portion 2A of the frame in the opposite direction, and may be fixedly fastened by studs and nuts implanted downward from the lower end plate portion 9A of the mounting bracket. Does not change. Mounting bracket lower end plate member 9
A and long holes are drilled in both the frame upper plate member 2A,
These may be connected with bolts and nuts. The attachment and detachment are performed by these bolts and nuts and pins 12 and 13.

[0029]

By implementing the present invention, all of the above objects are achieved. That is, the driver can check the situation by rotating or temporarily stopping the rotary blade while sitting in the driver's seat, and the corners of the ceiling, wall, slope, horizontal plane, etc. are narrow or wide. However, there is provided a three-wheel surface scraper capable of following this.

Further, in the present invention, since the front two wheels are of the inner cantilever type, the width can be easily adjusted, and there is no left or right uncut portion, so that all corners of the target surface can be cut. Furthermore, since the cutting depth can be easily reduced to a depth of about 30 to 100 mm at a time, it is possible to cut without limitation to the depth of the target surface by repeating this, especially flooring cutting, slope finishing excavation, It excels in excavation of information box construction, water and sewage box cutting, asphalt cutting, mortar cutting, oni masago cutting, etc.

In the apparatus of the present invention, a long hole is provided in the lower end plate member 9A of the mounting bracket or the upper plate member 2A of the frame, and further, in the both sides of the long hole along the rotation direction of the drum-shaped rotary blade. Since the rotary blade can be fixed by being offset from the rotating shaft 11 in the right-angle direction, the present invention can easily perform a cutting operation even on a work surface covered with an obstacle that overhangs upward. .

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment in operation.

FIG. 2 is a perspective view of the embodiment.

FIG. 3 is a side view of a main part of the rotary blade.

FIG. 4 is a perspective view of a 360 ° rotation type embodiment.

FIG. 5 is an enlarged sectional view of a rotation / fixing mechanism.

FIG. 6 is a sectional view of a main part of FIG. 5;

FIG. 7 is a bottom view of the embodiment (FIGS. 1, 2, and 4).

FIG. 8 is a sectional view showing an extension of the rotary blade support shaft.

FIG. 9 is a plan view showing a mounting state of a mounting bracket lower end plate portion and a frame upper end plate portion.

FIG. 10 is a plan view in which the mounting state of the lower end plate portion of the mounting bracket and the upper end plate portion of the frame are offset.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Example 2 Frame 2A Frame upper end plate-shaped part 4,5 Front drum-shaped rotary blade (front wheel) 6 Rear drum-shaped rotary blade (rear wheel) 4A, 5A, 6A Drum surface of each rotary blade 7 Hydraulic hose 8 Front bearing 8A Bearing 8B Front shaft extension 8C Screwed portion 8D Lock pin 9 Mounting bracket 9A Mounting bracket lower end plate-shaped portion 10A Front wheel drive hydraulic motor 10B Rear wheel drive hydraulic motor 11 Vertical axis 11A Vertical axis rotation hydraulic motor 12, 13 pin Reference Signs List 15 sprocket and chain 16 chain cover 20 center line 21 long hole 22 bolt head (or nut) 24 large diameter gear 24A pin groove 24C large diameter gear cover 25 movable pin 26 hydraulic cylinder 27 pinion gear 27C pinion gear cover 30A, 30B sled 31 Bit 32 Bit support 33 Bit hard part 39 Key R Drum radius S Bit axis T Tangential direction (tangential direction) 59 Rotation / fixing mechanism 100 Work surface (target surface) 101 Work chip AM Backhoe arm tip FW Forward RV Reverse

Claims (6)

[Claims] 1. Two substantially parallel drum-shaped rotary blades pivotally supported by a front inner bearing, one drum-shaped rotary blade pivotally supported rearward, and each drum-shaped rotary blade are driven. A frame having a drive system and a hydraulic motor for performing
A three-wheel surface grinder characterized by being detachably fixed to the tip of the backhoe arm. 2. A mounting for pivotally supporting a frame via a rotation / fixing mechanism capable of being fixedly rotated by 360 ° about an upper rotation axis substantially perpendicular to a plane including a support axis of each drum-shaped rotary blade. The three-wheel surface scraper according to claim 1, further comprising a base with a bracket. 3. The longitudinal fixing angle θ of each bit arranged in a row or spiral on the outer surface of the drum along the axis of rotation of the drum-shaped rotary blade is 30 ° to 60 ° with respect to the tangential direction of the drum. 3. The three-wheel surface scraper according to claim 1, wherein the three-wheel surface scraper is a uniform drum-shaped rotary blade. 4. A rotating / fixing mechanism for driving and rotating a pinion meshed with a large-diameter gear and a large-diameter gear fixed to an upper part of a frame supporting a drum-shaped rotary blade and coaxial with a rotating shaft. A rotating mechanism including a hydraulic motor fixed to a base with a mounting bracket, a large number of holes provided along the periphery of the large-diameter gear, and pins fitted into these holes. The three-wheel surface scraper according to claim 2, which is a rotating / fixing mechanism serving as a fixing mechanism. 5. The three-wheel surface scraper according to claim 1, wherein the target surface is any one of an asphalt pavement, a synthetic resin pavement, a mortar wall, a frozen pavement, and a freezer floor. 6. A mounting bracket lower end plate-shaped portion and / or a frame upper end plate-shaped portion are provided with a plurality of long holes along the rotating blade axis direction. The three-wheel surface scraping machine according to any one of claims 1 to 5, wherein the three wheels are fastened by bolts and / or studs and nuts and / or bolts and nuts so as to be adjustable in the axial direction of the drum-shaped rotary blade.