JPH0319357B2 - - Google Patents

Description

[Detailed Description of the Invention] [Objective of the Invention] (Field of Industrial Application) The present invention relates to a recoil-eliminating type cutting machine that uses the impact force of a rotary hammer to cause a cutting edge shaft to break into rock and crush it. be.

(Prior Art) Conventionally, there is an interrupt device as proposed in the specification and drawings of Utility Model Application No. 128479/1988 (unpublished).

As shown in FIG. 9, a movable support mechanism 13 is provided on a swing frame 12 of a power shovel vehicle 11 as a construction machinery vehicle, and this movable support mechanism 13 is attached to a bracket 14 on the swing frame 12 with an axis. 15, the base end of a vertically movable arm 16 is rotatably pivoted, and this vertically movable arm 16 is moved vertically by a vertically movable hydraulic cylinder 17 provided between it and the rotating frame 12. An L-shaped longitudinally movable arm 19 is rotatably attached to the tip of the arm 16 by a shaft 18, and this longitudinally movable arm 19 is moved around the shaft 18 by a longitudinally movable hydraulic cylinder 20 provided between it and the bracket 14. It is designed to move back and forth.

Further, in the movable support mechanism 13, the base end of a tilting hydraulic cylinder 21 is rotatably attached to the longitudinally movable arm 19, and one ends of links 23 and 24 are commonly attached to the tip of the piston rod 22 of the tilting cylinder 21. It is rotatably mounted on a shaft 25. The other end of one link 23 is rotatably attached to the longitudinally movable arm 19 through a shaft 26, and the other end of the other link 24 is welded to both sides of the slide body 31 through a shaft 27. It is rotatably attached to the plate 28.

Further, the slide cylinder 31, which is pressed toward the rock A by receiving a pressing force from the movable support mechanism 13 of the vehicle 11, is pivotally supported at the tip of the longitudinally movable arm 19. This slide cylinder 31 has fulcrum shafts 3 at symmetrical positions across its axis on both left and right sides thereof.
2, and the tip of the longitudinally movable arm 19 is rotatably fitted and connected to this fulcrum shaft 32.

An impulse generating device 5 is provided inside the slide body 31.
1 holder cylinder 35 is slidably fitted, this holder cylinder 35 is strongly biased to the left in FIG. 9 by a coil spring compressed into the slide cylinder 31, and A cutting edge shaft 44 for the rock A is fitted inside the shaft 35.
A tapered surface 48 is formed at the tip of the shaft 44.

Then, by pushing forward the longitudinally moving arm 19 by the longitudinally moving cylinder 20 of the movable support mechanism 13, the pushing force is applied from the fulcrum shaft 32 to the slide barrel 31, and the spring in the barrel is activated. The cutting edge shaft 44 is pressed against the rock A while being compressed.
The impact force generated by the impact generating device 51 is applied to the cutting edge shaft 44 to crush the rock.

(Problems to be Solved by the Invention) In such rock crushing, the pressing force from the longitudinal hydraulic cylinder 20 is applied to the cutting edge of the shaft 44 with the shaft 18 as a fulcrum, as shown by the arrow in FIG. Because the pressing direction (direction of the arrow) does not match the direction of action of the coil spring in the slide body, the coil spring in the body is not compressed sufficiently, and the rock that is obtained from the repulsive force of the spring in the body There is a problem in that the pressing force of the shaft 44 against A is impaired, and thereby the strong destructive force is also impaired. Also, the cutting edge is the shaft 18
There is also the problem that the destructive force of the cutting edge is not continuously applied to a fixed position on the rock because the cutting edge shifts in the direction of the arrow with each blow.

The object of the present invention is that the direction of the pressing force of the hydraulic cylinder for longitudinal motion coincides with the direction of action of the coil spring in the slide body, so that the coil spring in the body is sufficiently compressed, and the repulsive force of the spring in the body is used to prevent the cutting edge against rocks. The purpose is to ensure that the shaft is strongly crimped, and that the destructive force of the cutting edge is continuously applied to certain positions on the rock, so that a strong destructive force can be obtained from these.

[Structure of the invention]

(Means for Solving the Problems) The present invention provides that the slide cylinder 31 receives a pressing force from the movable support mechanism 71 provided on the construction machinery vehicle 11 and is pressed against the rock side. A holder tube 35 that is elastically biased toward the rock side via a coil spring 34 is slidably provided, and a cutting edge shaft 44 that contacts the rock is provided inside the holder tube 35 so as to be able to move forward and backward. 35, the movable support mechanism 71 is connected to the vehicle 11 by a hydraulic cylinder 76 for vertical movement. A vertically movable arm 74 that is rotated in the vertical direction is pivoted,
A parallel crank mechanism 81 is provided at the tip of this vertically movable arm 74. This parallel crank mechanism 81
A tilting link 78 rotatably pivoted on the tip of the vertically movable arm 74, a pair of mutually parallel vertical links 82 and 83 rotatably pivoted on the tilting link 78, and It consists of a mounting base 86 rotatably pivoted parallel to the tilting link 78 via vertical links 82 and 83, and further includes a convex portion 103 projecting from the vertically movable arm 74 and the tilting link 78. Hydraulic cylinder 80 for tilting between
A hydraulic cylinder 85 for longitudinal movement is interposed between the vertical movement arm 74 and one vertical link 83 of the parallel crank mechanism 81.
is installed with a rotatable shaft. The slide cylinder 31 is integrally provided on the mounting base 86.

(Function) In the present invention, the cutting edge shaft 44 is raised by the vertical movement hydraulic cylinder 76, the inclination angle of the cutting edge shaft 44 is changed by the tilting hydraulic cylinder 80, and the cutting edge shaft 44 is moved parallel by the longitudinal movement hydraulic cylinder 85. The mounting base 86 is moved straight through the crank mechanism 81, and the slide body coil spring 34 on the base 86 is smoothly and sufficiently compressed, and the cutting edge is strongly pressed against the rock. In this state, the impact generated by the impact generating device 51 is transmitted to the cutting edge shaft 44, and a strong destructive force is continuously applied to the rock.

(Example) Hereinafter, the present invention will be explained in detail with reference to the example shown in FIGS. 1 to 8.

As shown in FIG. 1, a swing frame 12 of a power shovel vehicle 11 as a construction machine vehicle
A movable support mechanism 71 is provided.

This movable support mechanism 71 includes the rotating frame 1
The vertically movable arm 7 is attached to the mounting part 72 on the upper part 2 by a shaft 73.
4 is rotatably attached to a shaft, and this vertically moving arm 74 is rotated in the vertical direction by a vertically moving hydraulic cylinder 76 provided between it and the front end attachment part 75 of the rotating frame 12. A tilting hydraulic cylinder in which a tilting link 78 is rotatably supported at the tip of the vertically movable arm 74 by a shaft 77, and the tilting link 78 is provided between the tilting link 78 and a mounting portion 79 on the vertically movable arm 74. Further, a parallel crank mechanism 81 is provided below the tilting link 78 with the tilting link 78 as an upper link. The right vertical link 83 is moved forward and backward by a hydraulic cylinder 85 for forward and backward movement provided between the vertical link 83 and the mounting portion 84 at the base end of the vertically moving arm 74, and the parallel crank mechanism 8
A mounting base 86 is provided as the lower link of 1. The tilting link 78 and the vertical link 82 of the parallel crank mechanism 81 are rotatably connected by a shaft 87, and each of the vertical links 82, 83 and the mounting base 86 are rotatably connected by shafts 88, 89, respectively. is connected to.

The slide cylinder 31 is fixed to the mounting base 86. This slide body 31 is integrally provided with a mounting plate 91, and a bolt 9 is inserted through this mounting plate 91.
2 on the mounting base 86.

Next, as shown in FIG. 2, the slide cylinder 3
1 is formed by integrally forming an inner cylinder part 33 at one end, a coil spring 34 compressed by the pressure of the movable support mechanism 71 is fitted inside this slide body 31, and further, the inner cylinder part 33 is A holder tube 35 is slidably provided inside the portion 33 and elastically biased toward the rock side via the spring 34. An embedded key (not shown) is provided in the axial direction between the inner cylindrical portion 33 and the holder cylinder 35 to prevent the holder cylinder 35 from rotating.

A spring receiver 36 fitted onto the outer peripheral surface of the tip of the holder tube 35 is integrated with the holder tube 35 by two penetrating taper pins 37 . A spring receiving flange 38 is welded to the outer peripheral surface of the spring receiving tube 36.
In response to the repulsive force of the compression coil spring 34, the biasing force of the spring 34 is applied to the holder cylinder 35. When assembling the spring receiver 36, the coil spring 34 is pushed in while being compressed and fixed with a taper pin 37. Finally, a sand stopper ring 3 is placed at the open end of the slide barrel 31, facing the spring receiving flange 38.
9 and install. Note that the slide cylinder 31
A compressible gap 40 (for example, about 200 mm) is provided between the inner cylindrical portion 33 and the spring receiver 36.

The coil spring 34 has a large diameter.
However, a similar repulsive force may be obtained by using a plurality of small-diameter coil springs.

Further, a split holder 41 is fitted into the holder cylinder 35 and integrated by the taper pin 37, a split holder 42 is fitted and integrated by the taper pin 43, and the A cutting edge shaft 44 that contacts the rock is fitted inside the split holder 41 so that it can move forward and backward within the range of the groove 45, and an impact force is applied to the cutting edge shaft 44 inside the split holder 42. An intermediate shaft 46 is fitted within the groove 47 so that it can move forward and backward. The cutting edge shaft 44 is provided with a tapered surface 48 at its tip.

Next, the body 52 of the impulse generating device 51 is welded to the rear end of the holder cylinder 35 to be integrally provided.

This impulse generating device 51 is provided with a motor 53 and a flywheel 54 for stabilizing the rotation of the motor 53 in the upper part of the body 52, and a rotary main shaft 55 is pivotally supported in the center of the body 52. 55, a rotation transmission mechanism 56 from the motor 53;
Rotation is transmitted through.

Further, a weight 57 which is rotated by the main shaft is integrally provided with the rotating main shaft 55, a hammer 59 is rotatably attached to the weight 57 by a shaft 58, and a balancer 61 is rotatably mounted by a shaft 60. wear it. Further, a middle rod 62 is selectively movable between a position where the hammer 59 receives impact force from the hammer 59 and transmits the impact force to the intermediate shaft 46 and a position where the hammer 59 is retracted. establish.

The support structure for the center rod 62 is such that a pair of bearings 63 are fixed to a relatively upper portion of the body 52, and the upper end of the oscillating lever 65 is rotatably attached to the bearings 63 by a shaft 64. The upper end of a vertical lever 67 is rotatably attached to the lower end of this horizontal lever 65 via a shaft 66, and the rod 62 is attached to the lower end of this vertical lever 67 via a middle rod support tube 68. To support. Then, the upper part of the leaf spring 69 is fixed to the horizontal vibration lever 65, and the lower part of this leaf spring 69 is fixed to the vertical vibration lever 65.
7 urges the center rod 62 toward the hammer 59 side.

Then, when the cutting edge shaft 44 is strongly pressed against the rock, the center rod 62 is positioned between the hammer 59 and the intermediate shaft 46, and the center rod 62 receives the impact force from the hammer 59. The blade moves around the shaft 66 in response to the impact, and transmits the received impact force to the intermediate shaft 46 and further to the cutting edge shaft 44. On the other hand, when the cutting edge shaft 44 is not sufficiently pressed against the rock, the middle rod 62 is retracted laterally around the shaft 64, and the hammer 59 rotates around the main rotation shaft 55. Despite this, it does not receive any impact from this hammer 59.
Therefore, dry firing with no load or light load is prevented.

In the case of automating the start and stop of impact by automatically detecting the crimping state (crimping force) at the cutting edge and automatically controlling the position of the center rod 62, for example, Japanese Patent Publication No. 61-56072 The crimping force detection mechanism disclosed in the publication may be used. Note that this selective movement of the center rod 62 may be performed by manual lever operation.

As shown in FIG.
, a notch recess 102 is provided in the central member 101, and convex portions 1 are provided on the upper surface of both sides of the central member 101.
03, and vertical link connecting portions 104 are integrally provided at both ends of the central member 101. The tip of the vertically movable arm 74 is fitted into the notched recess 102 and rotatably connected by the shaft 77, and the base end of the tilting hydraulic cylinder 80 is fitted into the protrusions 103 on both sides. The upper ends 82a, 83a of the vertical links 82, 83 are fitted into the lower grooves 106 of the connecting portions 104 at both ends, and the vertical links 82, 83 are rotatably connected by the shafts 105. They are rotatably connected.

FIG. 4 shows the mounting base 86, which is connected to the pair of side members 1 connected to the lower ends of the vertical links 82, 83 via the shafts 88, 89.
11 and two slide body receiving members 112 integrally provided between the tips of the pair of side members 111, and the bolt 92 is inserted into the mounting hole 113 provided in this receiving member 112. to fix the slide cylinder 31.

FIG. 5 shows the vertical link 83, which is formed into an H shape by a pair of vertical members 121 and a horizontal member 122 between them, and two sets of brackets 123 are attached to the horizontal member 122. A piston rod tip 85a of the longitudinal hydraulic cylinder 85 is connected to each bracket 123 by a shaft 124.

Next, to explain the operation of this embodiment, when a striking action is started by the impact force generating device 51 under a strong pressing action by the longitudinal hydraulic cylinder 85, each impact causes damage to the rock and the cutting edge shaft. 44, but the repulsive force of the compression coil spring 34 automatically presses the cutting edge against the rock and integrates it before the next impact. Then, the resultant force of the impact force from the impact generating device 51 and the pressing force from the spring 34 acts on the tapered surface 48 of the cutting edge, and the cutting edge shaft 44 is cut into the cemented carbide rock.

Since rock splitting work is carried out in invisible rock, if the crimp force detection mechanism is adopted, the cutting edge shaft 4 will be pressed until the compressible gap 40 expands to 200 mm.
4, the crimp force detection mechanism automatically retracts the center rod 62 to the side, and the impact by the hammer is automatically stopped, so that no blank impact is performed.

When the striking action is automatically stopped in this way, the sixth
As shown in the figure, by operating the piston rod of the longitudinal hydraulic cylinder 85 to push it out again, the vertical link 88 is moved around the shafts 77, 87.
3 and 82 rotate to the left, and the mounting base 86 moves straight to the left in a horizontal state, pressing the slide cylinder 31 toward the rock side. As a result, while compressing the coil spring 34 again, the cutting edge shaft 44
is pressed against the rock and the blow automatically resumes. At this time, since a strong impact force acts on the cutting edge of the cutting edge shaft 44, the angle of crimping with respect to the rock surface is set at a right angle so that the cutting edge of the cutting edge shaft 44 does not escape.

Further, the slide cylinder 31 moves straight together with the mounting base 86 of the movable support mechanism 71 to compress the spring 34, so that no moment is generated that would pry the slide cylinder 31 against the holder tube 35. Therefore, the pressing operation of the slide cylinder 31 is performed smoothly, the coil spring 34 provided between the slide cylinder 31 and the holder cylinder 35 is sufficiently compressed (200 mm), and the strong repulsive force of this spring 34 The cutting edge shaft 44 is continuously pressed against the rock until the compression gap 40 expands to 200 mm, and the effective impact force from the cutting edge shaft to the rock is continuously applied until it is automatically stopped.

FIG. 7 shows a state in which the vertical movement arm 74 is rotated upward about the shaft 73 by the vertical movement hydraulic cylinder 76, and the impulse generating device 51 and the like are raised. In order to bring the mounting base 86 into a horizontal state in this raised state, the tilting cylinder 80 may be pushed out and the tilting link 78 may be rotated counterclockwise until it becomes horizontal.

FIG. 8 shows one vertical link 8 by rotating the tilting link 78 counterclockwise about the shaft 77 by the tilting hydraulic cylinder 80.
3, the other vertical link 82 is lowered, thereby tilting the mounting base 86 and the device mounted thereon in the counterclockwise direction in the same manner as the tilting link 78, thereby adjusting the cutting edge angle.

In any case, the longitudinal hydraulic cylinder 8
5, when pushing out the mounting base 86, the vertical movement cylinder 76 and the tilting cylinder 80 are fixed. Otherwise, the cutting edge may move up and down while being pressed against the rock. When the operator releases the directional control valve (operation lever) used in construction machinery, the hydraulic cylinder
The spring automatically operates to return the valve to its neutral position, and the valve is automatically fixed by stopping the oil pressure and flow rate.

Finally, the impulse generating device 51 of this embodiment rotatably supports a hammer 59 and a balancer 61 around a rotating main shaft 55, and when the hammer 59 collides with the center rod 62, the hammer 59 and the balancer 61 are balancer 6
1 rotates around the axes 58 and 60,
Because I tried to eliminate the reaction that acts on me,
This recoil-eliminating impulse generating device 51 can be attached to the rotating frame 12 of the power shovel,
As a result, the scope of work can be expanded.

〔Effect of the invention〕

According to the present invention, as a movable support mechanism for an interrupter, a vertical movement arm that is rotated in the vertical direction by a vertical movement hydraulic cylinder is pivotally supported on a construction machine vehicle,
A parallel crank mechanism is provided at the tip of the vertically moving arm, and the parallel crank mechanism includes a tilting link rotatably attached to the tip of the vertically moving arm, and a tilting link rotatably attached to the tilting link. It consists of a pair of vertical links parallel to each other, and a mounting base rotatably pivoted parallel to the tilting link via the pair of vertical links, and protruding from the vertically movable arm and the tilting link. A tilting hydraulic cylinder is rotatably mounted between the convex portion, and a longitudinally moving hydraulic cylinder is rotatably mounted between the vertical arm and one vertical link of the parallel crank mechanism. Since the slide cylinder is integrated with the mounting base, the hydraulic cylinder for longitudinal movement moves the mounting base straight through the parallel crank mechanism, so that the direction of the pressing force of the hydraulic cylinder for longitudinal movement is directed within the slide cylinder. Coincident with the direction of action of the coil spring, the coil spring in the body is sufficiently compressed, and the repulsive force of the spring in the body causes the cutting edge shaft to continue to be strongly pressed against the rock.
Further, due to the straightness, the destructive force of the cutting edge is continuously applied to a certain position on the rock, and a strong destructive force can be obtained from these.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of the interrupter of the present invention, FIG. 2 is a sectional view showing the impulse generating device and the inside of the slide barrel, and FIG. 3 is a plan view of the tilting link portion thereof. Figure 4 is a plan view of the mounting base, Figure 5 is a front view of one of the vertical links, Figure 6 is a front view showing the action of the hydraulic cylinder for longitudinal movement, and Figure 7 is the hydraulic cylinder for vertical movement. FIG. 8 is a front view showing the action of the tilting hydraulic cylinder, and FIG. 9 is a front view showing the conventional interrupter. 11...Construction machinery vehicle, 31...Slide body,
34...Coil spring, 35...Holder tube,
44...Blade tip shaft, 51...Impact force generator,
71...Movable support mechanism, 74...Vertical movement arm,
76...Hydraulic cylinder for vertical movement, 78...Tilt link, 80...Hydraulic cylinder for tilt, 81...Parallel crank mechanism, 82, 83...Vertical link, 85
...Hydraulic cylinder for longitudinal motion, 86...Mounting base,
103...Protrusion.

Claims (1)

[Scope of Claims] 1. A slide cylinder that receives a pressing force from a movable support mechanism provided on a construction machinery vehicle and is pressed against the rock side, is elastically connected to the rock side through a coil spring that is compressed by the pressing force. A holder tube which is biased by the force is provided in a slidable manner, a cutting edge shaft that contacts the rock is provided inside the holder tube so as to be able to move forward and backward, and an impact force to be applied to the cutting edge shaft is provided at the rear end of the holder tube. In the interrupting machine equipped with an impulse generating device, the movable support mechanism pivotally supports a vertically movable arm that is rotated in the vertical direction by a vertically movable hydraulic cylinder on the vehicle, and the vertically movable arm A parallel crank mechanism is provided at the tip of the vertical arm, and the parallel crank mechanism includes a tilting link rotatably attached to the tip of the vertically movable arm, and a mutually parallel parallel crank mechanism rotatably attached to the tilting link. It consists of a pair of vertical links and a mounting base rotatably pivoted in parallel to the tilting link via the pair of vertical links, and a convex portion protruding from the vertically movable arm and the tilting link. A hydraulic cylinder for tilting is interposed between the vertical movement arm and one vertical link of the parallel crank mechanism, and a hydraulic cylinder for longitudinal movement is interposed between the vertical movement arm and one vertical link of the parallel crank mechanism, using a rotation movement. An interrupter characterized in that the slide cylinder is integrally provided on the mounting base. 2. The interrupter according to claim 1, wherein a power shovel vehicle is used as the construction equipment vehicle, and a movable support mechanism is provided on the swing frame of the vehicle.