KR100660526B1 - Jaw spacing adjustor for steel cutting and crushing device - Google Patents

Abstract

The present invention improves cutting performance by making it possible to finely control the clearance between the gap between the male and female jaws and the gap between the cutting edges, and prevents the steel from being caught between the male and female jaws, and the clearance due to the side wear In this case, the gap clearance can be easily compensated without disassembling, thereby providing a jaw gap control device for a steel cutting shredder that improves operation efficiency. The clearance adjustment device of the present invention is provided between the male jaw (10) and the female jaw (20), the boss (41) having a male screw portion (41a) formed in the axial direction of the main pin (30), and the boss of the boss (41) The clearance adjusting spacer 42 for adjusting the clearance between the male jaw 10 and the female jaw 20 by forming a female threaded portion 42a which is screwed into the male screw portion 41a, and the clearance adjusting spacer 42 does not rotate. It is composed of a position fixing means for fixing so that the clearance adjustment state is maintained.

Description

Jaw play control device of steel cutting crusher {JAW SPACING ADJUSTOR FOR STEEL CUTTING AND CRUSHING DEVICE}

1 is a perspective view showing a general steel cutting shredder,

Figure 2 is an exploded perspective view showing a typical steel cutting crusher,

Figure 3 is an exploded perspective view showing the female, male jaw of the steel cutting breaker according to the prior art,

4 is a front view of a state in which the iron bite to the steel cutting shredder when cutting the steel,

5 is a cross-sectional view of portion A of FIG. 4;

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

7 is a state just before cutting the steel by closing the jaw in the state of FIG.

8 is an exploded perspective view of a jaw play control device according to a first embodiment of the present invention,

9 is an assembled perspective view of the jaw play control device according to the first embodiment of the present invention,

10 is a cross-sectional view of the rotating part of the jaw gap adjusting device according to the first embodiment of the present invention;

11 is a cross-sectional view of a rotating part showing a modification of the jaw gap adjusting device according to the first embodiment of the present invention;

12 is an exploded perspective view of a jaw play control device according to a second embodiment of the present invention,

13 is a cross-sectional view of the rotary part of the jaw play control device according to a second embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

10: male 11,21: cutting blade

12,22: pinhole 13,23: shim

20: female. 30: main pin

41: boss 41a: male portion

42: clearance control spacer 42a: female thread portion

43: protrusion 44: stopper

45: pocket 46: bolt

50: main body 61: bush

62: inner bush

The present invention relates to a jaw gap adjusting device of a steel cutting crusher, and more particularly, to improve the cutting performance by easily and finely adjust the axial clearance between the male jaw and female jaw, and the cuts such as steel is a male and female jaw It relates to a jaw gap control device of a steel cutting shredder that can prevent the sandwich between.

The steel cutting crusher is one of the attachments used to be selectively mounted on the arm of an excavator.It is used to cut the scrap metal finely in a steel company or a steel mill, or to cut and dismantle the steel during the demolition of steel buildings such as factories. have.

As illustrated in FIGS. 1 to 4, the steel cutting crusher includes a male jaw 110 and an female jaw 120 that hold a plurality of cutting blades 111 and 121 for cutting steel W, respectively. , The male jaw 110 and the female jaw 120 is one end is connected to the main body 131 by the main pin 131 is installed so as to rotate around the main pin 131.

In addition, the male jaw 110 and the female jaw 120 is to be opened and closed by rotating the predetermined angle by the hydraulic cylinder (132,133), one side of the hydraulic cylinder (132,133) the male jaw (110) by the cylinder pin (134,135) And it is connected to the arm jaw 120, the cylinder rod side is connected to the main body 130 by the rod pins (136, 137), the mounting pin 138 for mounting the steel cutting shredder on the upper portion of the main body 130 is It is provided.

As shown in FIGS. 2 and 3, the male jaw 110 and the female jaw 120 are assembled to allow relative rotational movement with respect to the main pin 131, so that each pin of the male jaw 110 and the female jaw 120 is basically formed. The holes 112 and 122 and the main pin 131 are assembled to have a small gap therebetween, and the relative rotational movement must be possible on the two contact side surfaces (the side where the shim 113 is assembled) between the male jaw 110 and the female jaw 120. Therefore, it is assembled to form a certain gap.

As shown in FIG. 7, the steel cutting crusher has a force (arrow direction) pushing against each other in the male jaw 110 and the female jaw 120 by the reaction of the cutting force that cuts the steel W at the moment of cutting the steel W. In this case, the male jaw 110 assembled between the female jaw 120 by the force pushing the male jaw 110 and the female jaw 120 is pushed or twisted axially in the female jaw 120. Therefore, the cutting edge 111 of the male jaw (110) of the female jaw (110) by the gap between the main pin (131) cylindrical surface and the side surface of the shim (113) assembly surface between the male jaw (110) and the female jaw (120). It is twisted away from the cutting blade (121). That is, the cutting blades 111 and 121 of both the male jaw 110 and the female jaw 120 do not maintain parallel to each other.

For example, when the cutting blades 111 and 121 of the male jaw 110 and the female jaw 120 are opened 0.5 mm near the main pin 131, the farthest point from the main pin 131, that is, the cutting blades 111 and 121. At the end, it is about 2-3mm wide.

In order to solve this problem, the gap should be minimized, and the gap between the cylindrical surface of the main pin 131 should be able to smoothly rotate so that there is a limit to minimizing the gap.

Therefore, in the related art, as shown in FIGS. 3 and 5, a plurality of shims 113 are installed in the side gap between the male jaw 110 and the female jaw 120 to minimize the gap. However, the shim 113 is difficult to assemble into a very small gap. That is, the thick shim 113 is easy to fit, but it is difficult to finely fit the gap, the thin shim 113 can minimize the gap, but the assembly is very difficult. If no special dedicated assembly equipment is used, the side clearance that can be fitted using shims 113 is generally at least 0.5 mm.

In addition, long-term use causes wear on the side surface between the jaw 110 and the female jaw 120, so that the clearance in the axial direction in which the jaw 110 can move becomes greater and the gap of the cutting blades 111 and 121 becomes more severe. As such, if the gap between the male jaw 110 and the cutting blades 111 and 121 of the female jaw 120 is not maintained, the cutting performance is lowered and the thin steel W is sandwiched between the cutting blades 111 and 121.

Typically, the cutting machine is configured to retract both jaws 110 and 120 when operated in the extending direction in which the axial force of the hydraulic cylinders 132 and 133 is exerted so as to be greater than the force opening force to retract both jaws 110 and 120. Therefore, when the steel (W) is pinched, it is passed by a large force, the force to open both jaws (110, 120) is weak, so only the force of the hydraulic cylinder (132,133) can not open both jaws (110, 120), hydraulic jack or It is spread using a hammer, etc., and the cutting operation is stopped during this working time, thereby reducing the operating efficiency.

On the other hand, if the play of the cutter is used for a long time and the play of the side gap is increased, the shim 113 can be further assembled to minimize the play, but for this purpose it is inconvenient to disassemble the cutter in the state of FIG. Had followed, there was a problem that it is very difficult to keep the play fine by using a thin shim (113).

The present invention is to solve the conventional problems as described above, the object is to make it possible to finely control the clearance between the gap between the male and female jaws and the gap between the cutting edge to improve the cutting performance, the steel material The present invention provides a jaw gap control device for an iron cutting shredder which can prevent the jamming between the jaws.

In addition, another object of the present invention is that when the long-term use of the side of the male and female jaws wear and the clearance of the side gap increases, it is possible to simply fine-tune the clearance without disassembling the steel cutting crusher, cutting due to the clearance correction It is to provide jaw gap control device of steel cutting shredder which can improve the operation efficiency without stopping work for a long time.

In order to achieve the above object, the present invention, in the jaw gap adjusting device of the steel cutting shredder for maintaining a constant gap between the male jaw and female jaw rotatably installed on the main pin of the main body, it is installed between the male jaw and female jaw Jaw gap adjusting device of a steel cutting breaker comprising a boss having a male thread formed in the axial direction of the main pin, and a gap adjusting spacer for adjusting the play between the male jaw and the female jaw by forming a female thread that is screwed to the male thread of the boss. It is characterized by.

In addition, the jaw clearance adjusting device of the steel cutting shredder of the present invention is characterized in that it further comprises a position fixing means for maintaining the clearance adjustment state by fixing the clearance adjustment spacer so as not to rotate.

In addition, the jaw gap adjusting device of the steel cutting shredder of the present invention is characterized in that the boss is integrally formed around the pin hole of the male jaw.

In addition, the jaw gap adjusting device of the steel cutting shredder of the present invention is characterized in that the boss is provided separately and assembled by press-fitting into the pin hole of the male jaw.

Hereinafter, the jaw clearance adjusting device of the steel cutting shredder according to the present invention will be described in detail by the accompanying drawings. In this specification, the term "cutting crusher" is a concept encompassing having only one of a cutting function and a breaking function of steel and having both functions.

8 to 10 show a jaw gap control device of the steel cutting shredder according to the first embodiment of the present invention, as shown in the gap control device, the side of the cutting edge 11 fixed side of the male jaw (10) And a cylindrical boss 41 protruding in the axial direction of the main pin 30 from the side surface around the pinhole 12 of the male jaw 10, and a clearance adjusting spacer screwed to the boss 41 ( 42) and a position fixing means for preventing rotation of the clearance adjusting spacer 42.

A male thread portion 41a is formed on the outer circumferential surface of the boss 41, and a female thread portion 42a is formed on the inner circumferential surface of the clearance adjusting spacer 42 to be screwed to the male thread portion 41a. The clearance between the male jaw 10 and the female jaw (20) is set by the separation length between the clearance adjustment spacer 42 and.

The position fixing means of the clearance adjustment spacer 42 forms a plurality of projections 43 formed at equal intervals on the outer circumferential surface of the clearance adjustment spacer 42 and a fixing groove 44a to which the projections 43 fit. It consists of a stopper 44 which is present, and the stopper 44 is removably fixed to the pocket 46 fixed to the side of the male jaw 10 with the bolt 46.

In the assembly of the clearance adjusting device configured as described above, after the female threaded portion 42a of the clearance adjusting spacer 42 is screwed into the male threaded portion 41a of the boss 41, the clearance adjusting spacer 42 is rotated clockwise. In this case, the clearance adjustment spacer 42 is close to the side of the male jaw (10). In this state, the male jaws 10 are inserted into the female jaws 20 to align the pin holes 12 and 22, and the main pins 30 are fitted into both pin holes 12 and 22 to assemble with the main body 50. When the clearance adjusting spacer 42 is rotated counterclockwise, the clearance adjustment spacer 42 can be adjusted by narrowing the clearance between the male jaw 10 and the female jaw 20 by being spaced apart from the side of the male jaw 10. In addition, assembling is simpler and assembly time is shorter than that of conventional assembly using shims.

In the play control device of the first embodiment, since the play control spacer 42 is screwed to the boss 41, the play control spacer 42 is rotated clockwise or counterclockwise. ) Is moved in the axial direction of the main pin (30) to adjust the widening or narrowing the clearance between the male jaw (10) and the female jaw (20), after the clearance adjustment, the fixed groove (44a) of the stopper 44 and Since the position of the clearance adjustment spacer 42 is fixed by fitting the projection 43 of the clearance adjustment spacer 42, it can maintain the clearance adjustment state.

In addition, in the play control device of the present invention, since the play control spacer 42 is screwed to the boss 41, fine play adjustment is possible.

That is, the amount of change in the width of the male jaw 10 when the clearance adjustment spacer 42 is rotated by one click is "the thread pitch of the clearance adjustment spacer / the number of protrusions of the clearance adjustment spacer". For example, when the thread pitch of the clearance adjusting spacer 42 is 2 mm and the projections 43 are 16, the width adjustment amount per click is 2/16 = 0.125 mm. Therefore, the side gap that can be fitted using the shim as in the prior art is at least 0.5mm, while using the clearance control spacer 42 allows finer clearance adjustment.

In addition, when the steel cutting crusher is used for a long time, wear occurs on the contact surface between the male jaw 10 and the female jaw (20) to increase the play in the lateral direction. Accordingly, when the clearance is to be corrected, the bolt 46 is released, the stopper 44 fixed to the pocket 45 is disassembled, and the projection 43 formed on the outer circumferential surface of the clearance adjustment spacer 42 is hammered with a tool. Rotate the clearance adjustment spacer 42 counterclockwise, so that the clearance adjustment spacer 42 is spaced apart from the side of the male jaw 10 so that the clearance between the male jaw 10 and the female jaw 20 becomes narrow. You can compensate for the increased play.

Rotate the clearance adjusting spacer 42 until it is no longer turned, and then rotate the clearance adjusting spacer 42 slightly to reverse the projection 43 of the clearance adjusting spacer 42 in the fixing groove 44a of the stopper 44. Stop at the position where can be matched, and once again the fixing groove 44a of the stopper 44 is fitted to the projection 43 to fix the stopper 44 to the pocket 45 with the bolt 46, After correcting the play by canceling the play as much as worn, it is possible to maintain the correction state.

On the other hand, as shown in Figure 10 by rotating the clearance control spacer 42 to narrow the clearance between the male jaw (10) and female jaw 20, relatively cutting edges (11, 21) of both sides are far away. That is, the gap between the cutting blades 11 and 21 becomes wider, which is achieved by further adding cutting blade shims 13 and 23 assembled inside the cutting blades 11 and 21. The gap can be adjusted.

In addition, Fig. 11 shows a modification of the first embodiment, in which a clearance adjusting device is provided on the opposite side of the surface on which the cutting blade 11 of the male jaw 10 is fixed. That is, the boss 41 is provided on the opposite side of the cutting blade 11 fixed side, and the clearance adjusting spacer 42 is screwed to form the rotation, and then the clearance adjusting spacer 42 is rotated so that the male jaw 10 and the female jaw 20 are rotated. If the gap between the) narrows, the gap between the cutting blades 11 and 21 becomes relatively narrow, so that the cutting blade shims 13 and 23 may be replaced with thinner shims or the number of shims may be reduced.

12 and 13 show the shoe clearance adjusting device of the steel cutting shredder according to the second embodiment of the present invention, the bush 61 is formed separately from the male jaw 10 to form a male jaw (61a) is a male jaw ( It is configured by press-fitting into the pin hole 12 of the 10, and the female jaw (20) is pressed so as not to rotate while the male jaw (10) is provided with an inner bush 62 is assembled to have a small gap rotatably ( The same as in the first embodiment except for the configuration in which the male jaw 10 is minimized with respect to 20). Therefore, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

The configuration of the second embodiment also performs the same operation as that of the first embodiment. In addition, since the bush 61 is manufactured separately and press-fitted into the male jaw 10, the operation of forming the male screw portion 61a on the outer circumferential surface of the bush 61 is easier than in the first embodiment, thereby improving workability. You can.

In addition, as shown in FIG. 13, if the inner bush 62 is press-fitted into the female jaw 20 without a gap, the pinholes of the main pin 30 and the male jaw 10 and the female jaw 20 are as shown in FIG. 11. 12,22) Since there is a gap in both surfaces of the rotating cylinder, it is possible to further reduce the gap between the male jaw (10) and the female jaw (20).

In addition, since the male jaw 10 and the female jaw 20 which are separated from each other until the main pin 30 is assembled are temporarily assembled through the inner bushing 62, the work of assembling the main pin 30 to the main body 50 is further performed. It becomes easy.

In the second embodiment, the bush 61 is inserted into the pin hole 12 of the male jaw 10 on the opposite side of the cutting blade 11 so that the male screw portion 61a protrudes toward the cutting blade 11, and the cutting blade 11 Although the configuration for screwing the clearance adjusting spacer 42 on the side) has been described, on the contrary, the bush 61 is inserted into the pin hole 12 of the male jaw 10 from the cutting blade 11 side, so that the male thread portion 61a is the cutting blade. (11) It may be configured to protrude to the opposite side and to fit the clearance adjusting spacer 42 on the opposite side of the cutting blade 11.

In the above, the embodiment of the present invention having only the cutting blade in the male and female jaws has been described, but the crushing tooth is attached to the female and female jaw together with the cutting blade or alone to change the cutting function and the crushing function to perform both functions. Naturally, it is also possible that such modifications should be regarded as falling within the scope of the present invention.

As described above, according to the jaw gap adjusting device of the steel cutting shredder according to the present invention, the gap between the male jaw and the female jaw, the clearance between the male jaw and the female jaw, finely controlled by the screw fitting of the boss and the gap adjusting spacer installed between the male jaw and the female jaw Cutting performance is improved, and steel is prevented from being caught between the male and female jaws. In addition, even if the clearance increases due to the side wear of the male and female jaws, the clearance can be compensated without disassembling the male and female jaws, so that the cutting operation does not stop for a long time due to the clearance adjustment. The efficiency can be improved.

Claims (5)

In the jaw gap adjusting device of the steel cutting shredder for maintaining a constant gap between the male jaw 10 and the arm jaw 20 is freely rotated coaxially by the main pin 30 of the main body 50, A boss (41) installed between the male jaw (10) and the female jaw (20) and having a male screw portion (41a) formed in the axial direction of the main pin (30); The inner circumferential surface is formed with a female threaded portion 42a, which is screwed to the male threaded portion 41a of the boss 41, and a plurality of protrusions 43 are formed on the outer circumferential surface of the male jaw 10 and the female jaw by rotation. A clearance control spacer 42 for controlling clearance between the gaps; Position fixing means for fixing the clearance control spacer 42 not to rotate to maintain the clearance adjustment state; Jaw gap adjustment device of the steel cutting shredder comprising a. The method of claim 1, The position fixing means is fitted with the pocket 45 provided on one side of the male jaw 10 and the projection 43 formed on the outer circumferential surface of the play control spacer 42 and seated in the pocket 45 at the same time. Jaw gap adjustment device of the steel cutting shredder comprising a stopper (44). The method according to claim 1 or 2, The boss (41), jaw gap adjustment device of the steel cutting breaker, characterized in that formed integrally around the pin hole (12) of the male jaw (10). The method according to claim 1 or 2, The boss (41) is provided separately and pressed into the pin hole (12) of the male jaw (10) jaw gap adjustment apparatus of the steel cutting shredder, characterized in that assembled with the clearance adjustment spacer (42). The method according to claim 1 or 2, Jaw gap adjustment device of the steel cutting shredder, characterized in that the female jaw (20) is formed integrally with the body (50).

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