JP2006022615A - Shearing equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide shearing equipment capable of offering thin jaw tips and of certainly preventing the jaw tips from being kept opened by assuring the smooth motion of the jaw tips without using any other pushing means even after their rattling is brought. <P>SOLUTION: A tip of a hydraulic cylinder 5 for turning a movable jaw 4 is installed in such a manner that the tip of the hydraulic cylinder 5 can be slanted to the opposite jaw tip side of a fixed jaw 2 from a surface perpendicular to a turning shaft of the movable jaw 4 hinged to a pin 9; the movable jaw 4 kept to a turning motion by the hydraulic cylinder 5 is pushed diagonally to the jaw tip side of the fixed jaw 2 by the opening and closing motions intersecting each other, thereby permitting to reduce the thickness of the jaw tip; and therefore smooth turning motions of the movable jaw 4 can be obtained and the movable jaw 4 remaining to an open state can be certainly prevented even though any rattling occurs. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a shearing device that opens and closes a pair of jaws provided with cooperating shearing blades.

  Some shearing devices that cross open and close a pair of jaws provided with cooperating shear blades rotate one or both jaws around a rotation axis by expansion and contraction of a cylinder. This type of shearing equipment is often used for shearing (including cutting) scraps of various composite materials such as reinforced concrete, rubber belts with steel wires, and metal scrap. When shearing building scraps such as reinforced concrete, Used at the end of an arm such as a power shovel.

  When shearing hard and thick materials such as scraps of various composite materials and metal scrap, the shear force acts in the direction of the axis of rotation of the jaws and opens and closes each other. There is a problem that the so-called mouth opening, in which the jaws are separated from each other, occurs and the shearing ability is lowered. When the play becomes large due to wear or the like of the rotating part of the jaw, the opening of the mouth is further increased and becomes impossible to shear.

  As means for preventing such opening of the mouth at the time of shearing, the configuration in which one jaw holds the other jaw from both sides, and the shearing blades of each jaw are arranged in a staggered manner, these shearing blades are used. As a configuration in which the left and right jaws bite alternately in the longitudinal direction of the jaws, the jaws that open and close cross each other are restrained (for example, see Patent Document 1), and the movable jaw that is rotated is displaced by a cam slope or the like. There is one that is regulated and moved toward the other party's fixed jaw (for example, see Patent Document 2). In addition, there is a type in which the movable jaw is vertically pressed toward the fixed jaw along the rotation axis by a pressing means such as a coil spring or hydraulic pressure.

Japanese Patent No. 2632486 (page 3-4, FIG. 1-10) Utility Model Registration No. 2511833 (page 3-4, Fig. 1-2)

  Among the above-described conventional shearing devices, the jaws that restrain each other can surely prevent the opening of the mouth, but the arrangement of the shearing blades is restricted to two rows or a staggered shape, etc., and also opens and closes. For example, when a rubber caterpillar belt with steel wires is sheared between steel links attached at narrow intervals, the thick jaw points are used as shear intervals at narrow intervals. There is a problem that cannot be inserted.

  On the other hand, the one that regulates the displacement of the movable jaw and moves it toward the fixed jaw of the other side can arrange the shearing blade in a straight line and the thickness of the jaw tip does not increase, but the wear of the rotating part of the jaw If there is a backlash due to, etc., there is a problem that the mouth opening cannot be prevented. In addition, a device that presses the movable jaw vertically to the fixed jaw side by the pressing means can absorb the backlash by the pressing, but requires a separate pressing means, so the configuration is complicated and the vertical pressing force As a result, the contact between the shearing blades is strongly restrained, and the smooth rotation of the jaws is obstructed.

  Therefore, the object of the present invention is to reduce the thickness of the tip of the chin and to ensure smooth rotation of the chin without the need for a separate pressing means, and to reliably prevent the mouth from opening even if looseness occurs. It is to provide a shearing device that can.

  In order to solve the above-mentioned problems, the present invention is configured to rotate at least one of a pair of jaws around a rotation axis by extending and contracting a cylinder, to cross open and close the other jaw, and to open and close these crosses. In a shearing device that cooperates with shearing blades provided on a pair of jaws, the tip of the cylinder is tilted toward the other jaw tip side with respect to a surface perpendicular to the pivoting shaft, to the pivoted jaw side. A configuration is adopted in which the jaw rotated by the cylinder is pushed obliquely toward the other jaw tip when the other jaw is opened and closed.

  In other words, the tip of the cylinder that rotates the jaw is tilted and attached to the other jaw tip side with respect to a plane perpendicular to the jaw rotation axis, and the jaw that is rotated by this cylinder is tilted toward the other jaw tip side. By opening and closing while pressing, it is possible to reduce the thickness of the chin, and without the need for a separate pressing means, ensure smooth jaw rotation and ensure that the mouth opens even if play occurs I was able to prevent it.

  At least the base end of the cylinder is axially attached via a spherical plain bearing, and by allowing the change of the inclination angle to the other jaw tip side, the contact between the shearing blades is softened and the jaws are rotated more smoothly. Can move.

  In the shearing device of the present invention, the tip of the cylinder for rotating the jaw is attached to the other jaw tip side with respect to a surface perpendicular to the rotation axis of the jaw, and the jaw rotated by this cylinder is attached to the other jaw. Since the cross-opening and closing is performed while pushing diagonally to the chin tip side, the thickness of the chin tip can be made thin, and smooth rotation of the chin can be secured without the need for a separate pressing means. Even if it occurs, it is possible to reliably prevent the opening of the mouth.

  At least the base end of the cylinder is pivotally attached via a spherical plain bearing, allowing the change in the angle of inclination toward the other jaw tip, softening the contact between the shearing blades and rotating the jaw more smoothly can do.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 5 show a first embodiment. As shown in FIG. 1, the shearing device 1 is attached to the tip of an arm such as a power shovel A, and the fixed jaw 2 is integrally formed as shown in FIGS. 2 and 3 (a) and 3 (b). The movable jaw 4 pivotally attached to the base 3 is rotated by expansion and contraction of the hydraulic cylinder 5 to open and close the fixed jaw 2 and cooperate with the shearing blades 2a and 4a provided on the fixed jaw 2 and the movable jaw 4, respectively. By this, building waste materials and the like are sheared.

  As shown in FIGS. 4 (a) and 4 (b), the base body 3 is movable by attaching an arm mounting bush 8 on the rear end side to parallel plates 7a and 7b joined by an obliquely inclined shaft 6. A bush 10 for inserting a pin 9 pivotally attached to the jaw 4 is attached to the distal end side, and one plate 7a is extended to the distal end side, and the fixed jaw 2 to which the shearing blade 2a is attached is integrally formed. Has been. The base end of the hydraulic cylinder 5 is pivotally attached to an obliquely inclined shaft 6 via a spherical plain bearing 11a, and the axial attachment position is fixed by sleeves 12a and 12b fitted on the shaft 6.

  As shown in FIGS. 5A and 5B, the movable jaw 4 includes a straight front plate 13a to which a shearing blade 4a is attached and a rear plate 13b whose tip is bent toward the front plate 13a. The pin 9 is inserted into the bush 14 and the movable jaw 4 is pivotally attached to the base 3. Further, a bush 15 is attached to the tip side of each plate 13a, 13b at a right angle to the bent plate 13b, and the tip of the hydraulic cylinder 5 is fitted with a spherical plain bearing 11b on a pin 16 inserted obliquely into the bush 15. It is adapted to be pivotally attached via. The pin 16 is inserted into the bush 15 in parallel with the inclined shaft 6 of the base 3.

  Therefore, as shown in FIG. 3B, the hydraulic cylinder 5 has a tip inclined toward the jaw tip side of the fixed jaw 2, and a spherical plain bearing 11a on the shaft 6 of the base 3 and the pin 16 of the movable jaw 4. , 11b, and the movable jaw 4 is opened and closed by obliquely pressing the movable jaw 4 toward the jaw tip side of the counterpart fixed jaw 2 by the expansion and contraction, thereby ensuring smooth rotation of the movable jaw 4 and rotation. Even if backlash occurs due to wear of the part, the mouth opening during shearing is reliably prevented.

  6 and 7 show a second embodiment. This shearing device is a floor-standing type, and shears a rubber caterpillar belt or the like containing steel wire. The base 3 is fixed to the floor-standing frame 17 and parallel plates 7a and 7b forming the base 3 extend upward. The hydraulic cylinder 5 is attached to the pin 16 of the movable jaw 4 with the tip thereof directed obliquely downward, with the top portion thereof coupled by an obliquely inclined shaft 6. The other portions are the same as those of the first embodiment, and the hydraulic cylinder 5 is configured to open and close while obliquely pressing the movable jaw 4 toward the jaw tip side of the counterpart fixed jaw 2.

  8 to 10 show a third embodiment. This shearing device is also attached to the tip of an arm such as a power shovel. As shown in FIG. 8, two movable jaws 4 that pivot in the upside down direction are pivotally attached to the base 3, and these movable jaws. The fourth embodiment is different from the first embodiment in that the four shear blades 4a are made to cooperate with each other by opening and closing each other.

  As shown in FIG. 9 and FIG. 10, the base body 3 includes parallel plates 7a and 7b to which arm-attaching bushes 8 are attached, and shafts 6a inclined obliquely with the plates 7a and 7b on both sides in the middle. And an intermediate plate 7c joined at 6b. The shafts 6a and 6b are symmetrically arranged on the opposite sides with respect to the center line of the base 3, and the base ends of the hydraulic cylinders 5a and 5b for rotating the movable jaws 4 are respectively interposed through the spherical plain bearings 11a. The shaft attachment position is fixed by sleeves 12a and 12b which are attached to the shafts and are fitted onto the shafts 6a and 6b. In addition, a bush 10 is attached to the distal end side of each plate 7a, 7b, 7c, and each movable jaw 4 is pivotally attached to both sides of the intermediate plate 7c by a pin 9 fitted and inserted therein.

  Each movable jaw 4 has a straight front plate 13a attached with a shearing blade 4a and a rear plate 13b whose front end is bent toward the front plate 13a at the rear end, as in the first embodiment. It is connected by a bush 14, and a pin 9 is inserted into the bush 14 and pivotally attached to the base 3. Further, a bush 15 is attached to the tip side of each plate 13a, 13b at a right angle to the bent plate 13b, and the tip of each hydraulic cylinder 5a, 5b is slipped spherically onto a pin 16 that is obliquely inserted into the bush 15. The shaft is attached via a bearing 11b.

  Therefore, in this embodiment, the two movable jaws 4 that open and close each other are obliquely pressed toward the jaw tip side of the counterpart movable jaw 4 by the hydraulic cylinders 5a and 5b attached to each other so as to be inclined. Smooth rotation of the movable jaw 4 is ensured and opening of the mouth during shearing is prevented.

  In each of the above-described embodiments, a hydraulic cylinder is used as a cylinder for rotating the movable jaw, and its proximal end and distal end are axially attached via a spherical plain bearing. However, only the proximal end is axially attached via a spherical plain bearing. Alternatively, an air cylinder may be used as the cylinder.

Front view showing a power shovel equipped with the shearing device of the first embodiment The front view which expands and shows the shearing device of FIG. a is a front view showing a state in which the movable jaw and the fixed jaw of FIG. 2 are closed, and b is a plan view of a. a is a front view showing the base and the fixed jaw of FIG. 2, b is a plan view of a a is a front view showing the movable jaw of FIG. 2, b is a plan view of a The front view which shows the shearing device of 2nd Embodiment. Plan view of FIG. The front view which shows the shearing device of 3rd Embodiment The front view which shows the state which closed the movable jaws of FIG. Plan view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shearing device 2 Fixed jaw 2a Shearing blade 3 Base | substrate 4 Movable jaw 4a Shearing blade 5, 5a, 5b Hydraulic cylinder 6, 6a, 6b Shaft 7a, 7b, 7c Plate 8 Bush 9 Pin 10 Bush 11a, 11b Spherical plain bearing 12a, 12b Sleeve 13a, 13b Plate 14, 15 Bush 16 Pin 17 Frame

Claims (2)

  Shearing by rotating at least one of the pair of jaws around the rotation axis by expanding and contracting the cylinder, crossing and opening with the other jaw, and cooperating with shearing blades provided on the pair of jaws that open and close In the apparatus, the tip of the cylinder is tilted toward the other jaw tip side from a surface perpendicular to the rotation axis, and is attached to the rotated jaw side, and the jaw rotated by the cylinder is A shearing device characterized in that when it is opened and closed with a counterpart jaw, it is pressed obliquely toward the counterpart jaw side.   The shearing device according to claim 1, wherein at least a base end of the cylinder is axially attached via a spherical plain bearing so as to allow a change in an inclination angle toward the chin tip side of the counterpart.

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