JPH0418967B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heavy-duty shearing machine, particularly a heavy-duty shearing machine adapted to be mounted on a rigid boom of a motor vehicle, and more particularly on a backhoe date pass. Regarding powerful shearing machines.

High-power shears of the type driven by hydraulic cylinders have proven useful in handling scrap, especially metal scrap of all types. Scrap comes in a variety of forms, including pipes made of steel, soft iron, and cast iron, with diameters ranging from less than 2 inches to 8 or 10 inches or more. There are also structural beams such as I-beams, channels, and angles with lateral dimensions of 8 or 10 inches or more, as well as rods with diameters of 2 to 3 inches and larger. and thick cables, as well as all kinds of metal sheets, plates, and formed metals, including wheels and automobile frames, as well as countless long and short materials, metals, cast, rolled, stamped, or otherwise formed. Some may include pieces singly or in various combinations.

Conventionally, there have been various types of shearing machines as shown in, for example, US Pat. No. 4,198,747, US Pat. No. 4,118,8721, and US Pat. These high-power shears are typically mounted on the date pass stick of a backhoe and provide very good control in handling various scraps and cutting them into shorter pieces.

However, these conventional shears have various drawbacks and cannot be used as efficiently and quickly as desired, given the amount of scrap that must be reduced in size before processing.

It is an object of the present invention to provide a new and improved high power shear capable of handling scrap metal of almost any shape and size and cutting it into pieces for bulk handling during reprocessing.

Another object of the invention is to provide a new shearing machine which is capable of efficiently handling scrap existing in long pieces, such as beams, pipes, cables, etc., and which can be reduced in size.

A feature of the present invention is a high-power shearing machine that can be attached to the day pass stake of a backhoe.
The shear has a rear or lower jaw and a front or upper jaw opposite and pivotally connected to the lower jaw. The upper jaw is opened and closed by a hydraulic cylinder in the opening.

The upper and lower jaws have cooperating shear blades with replaceable inserts forming the cutting edges of these shear blades. The shear blade has inner and outer cutting edge portions along its length, and these inner and outer cutting edge portions are inclined at obtuse angles to each other.

The lower jaw has a rigid guide blade extending along and spaced from the shear blade, the guide blade and the shear blade being attached to each other at adjacent outer ends, with a gap between the outer ends of the blades. This prevents the sheared scrap metal from pinching together and prevents the outer edges from separating from each other.

The guide blade and shear blade are interconnected near the pivot and also at the inner end. This connection is made by a rigid plate which is welded to the blade and extends adjacent the pivot and across the space between the inner portions of the blade. A rigid connecting plate is spaced below the cutting edge of the lower shearing blade to prevent cut scrap metal from becoming lodged in the space between the shearing blade and the guide blade in the lower jaw.

The lower jaw defines an open stop between the outer edge portion of the shear blade and the adjacent guide blade. The outer end of this slot is traversed by a rigid connecting plate welded to the shear blade and guide blade.

The open slot receives the outer end of the upper shear blade when the upper jaw is closed. Upon closure of the jaws, the shearing edges move across each other in shear. The open slot is significantly wider than the upper shear blade, so there is a significant open space between the upper shear blade and the guide blade when the upper shear blade is located within the open slot.

Attached to the facing sides of the upper jaw and guide blade are wear plates or guide pouts that engage each other as the upper and lower shear blades shear the workpiece. At the outer end of the guide blade, a wear plate or a guide plate is arranged adjacent to the lateral coupling plate. The outer end of the upper jaw is arcuate, and the wear put or guide plate thereon is also arcuate near the outer end.

The upper edge of the guide blade, which is spaced from the cutting edge of the lower shearing blade by the width of the open slot, is spaced well below the cutting edge of the lower shearing blade. The guide blade therefore serves as a workpiece support for supporting the workpiece after a certain length of the workpiece has been cut. The backhoe boom and shear then swing laterally to move the shear blade along the workpiece in preparation for cutting another portion of the workpiece. As a result, long beams, pipes, heavy cables, and other workpieces can be cut into short pieces in just a few passes without dropping them.

This shearing improvement makes it easier to handle long workpieces and allows the workpiece to be cut into shorter pieces without having to drop it after each cut. In addition, the rigid connection between the outer ends of the lower shear blade and the guide blade minimizes lateral movement of the shear blade during cutting, and puts lateral pressure on the upper shear blade as it swings through the cut of the workpiece. can be given.

An embodiment of the present invention will be described below with reference to the drawings.

A heavy-duty shearing machine is indicated generally at 10;
This is mounted on a rigid day pass stick 11. This day pass stick 11 is part of the backhoe's boom and is adapted to be connected to the backhoe's hydraulic cylinder(s) 12. A hydraulic cylinder is located along the day pass stake 11 and the cylinder end is attached to the backhoe.

The shear 10 includes a lower or rear jaw 13 and an upper or front jaw 14 which are interconnected by a pivot bearing structure 15. This pivot bearing structure allows the upper jaw 14 to swing relative to the lower jaw 13.

The lower jaw 13 has a rigid mounting plate 16 carrying attachable pins 17, 18 which can be rigidly attached to the date pass stakes 11 of the backhoe.

The upper jaw 14 also has a rigid plate 1 supporting a removable pin 20 adapted to be attached to the telescoping piston rod 12,1 of the hydraulic cylinder.
It has a bracket consisting of 9. The bracket plate 19 and the mounting plate 16 can take various shapes depending on the form of connection to the date pass stick 11 and the hydraulic cylinder 12, and the connecting portions can also vary depending on the model of the backhoe.

The upper jaw portion 14 constitutes a shearing blade 21,
This shearing blade has inner and outer edge portions 2 that are oriented diagonally to each other.
It has 2,23. The upper shearing blade 21 has hardened cutting inserts 24, 2 extending along its inner and outer edge portions.
5 and these cutting inserts have shearing edges 2
4,1,25,1. insert 2
4, 25 are elongated rods made of very hard high carbon steel and shaped to provide a separate cutting edge that can be used by repositioning the inserter on the shear blade 21. be. The inserts 24 and 25 are removably attached to the shearing blade 21 using mounting bolts inserted into holes.

The upper shear blade 21 also has a pressure plate or wear plate 26 which is mounted on the left side of the shear blade adjacent to the outer end 21,1 and which is attached to the pivot 1.
It is shaped like an arc around the center of 5. The pressure plate 26 is welded to the shear blade 21, but can be replaced when worn. The lower jaw 13 has a lower shear blade 27 and a rigid guide blade 28 extending along the outside of the pivot 15. The shear blades 27 and guide blades 28 are secured to each other and to the mounting plate 16 and become integral with the day pass stake 11 when mounted on the backhoe. The top surface of the guide blade 28 defines an open slot 29 spaced below the shearing tip of the inner portion of the lower shear blade 27 and in which the upper shear blade 21 can swing, but at its outer end there is a rigid connection. A rigid interconnection is provided by a plate 30 which is welded to both the shear blade 27 and the guide blade 28. The thickness of the lower shear blade is greater than its width to provide strength against shearing action, and the top surface of the guide blade extends beyond the shearing edge of the lower shear blade by a distance at least as large as the thickness of the lower shear blade. separated from below.

The inner parts of the shear blade 27 and the guide blade 28 adjacent to the pivot 15 are also interconnected by a transverse rigid plate 31. This rigid plate 31
It is also attached to the shearing blade 27 and the guide blade 28 by welding. The plate 31 has a shear blade 27 and a guide blade 2.
8 and closes the open slot 29 adjacent to the inner portion thereof.

The lower shearing blade 27 is a replaceable insert 3
2, 33, these inserts forming the inner and outer cutting edge portions 32.1, 33.1 of the lower shearing blade 28. The inner and outer cutting edge portions of the shearing blade 28 are inclined at an obtuse angle with respect to each other, and similarly the inner and outer cutting edge portions of the lower shearing blade 28 are inclined at an acute angle with respect to the inner and outer cutting edge portions 24.1, 25.1 of the upper shearing blade 21. The upper and lower shearing blades 21, 27
can cooperate with each other to place the work piece W approximately halfway along the length of the shear blade. insert 3
2 and 33 are removably attached by bolts or the like, and by rearranging these inserts, any of the four cutting edges can be positioned as a cutting edge before the inserts have to be replaced. be able to.

The guide blade 28 includes the inner and outer cutting edge portions 32.1 of the lower shear blade 27, as best seen in FIG.
33.1 and has inner and outer portions 28.1, 28.2 of the upper edge. These inner and outer upper edge portions 28.1, 28.2 are inclined with respect to each other at an angle very close to the angle between the inner and outer edge portions of the lower shear blade 27. The top surface of the transverse plate 31 lies approximately in the same plane as the inner part 28.1 of the top edge of the guide blade 28. The plate 31 is therefore located below the inner insert 32 of the lower shear blade. Since the upper edge of the guide blade 28 is located below the level of the cutting edge of the shearing blade 27, after the work piece W is cut into a short length L, the upper edge portion of the guide blade 28
8.1, 28.2 and is supported by it. There is therefore no need to pick up the workpiece from the ground and it can be immediately prepared for the subsequent cutting operation. After a short length L is cut from the work piece W, the shears 10 and the date pass stick 11 of the backhoe swing laterally, approximately in the direction of the arrow S,
The lower jaw 13, which continues to support the workpiece W on the guide blade 13, can simply slide along the workpiece to a new position, in which it can be cut again. Alternatively, the upper jaws 14 can be closed to grip the workpiece and pull it to a new position where the cut can be made.

The guide blade 28 is sufficiently spaced from the shear blade 27 that when the upper shear blade 21 swings downwardly into the open stop 29, the upper shear blade 21 and the guide blade 2
Leaving sufficient open space 29.1 between the opposite faces of 8. As a result, the tendency of scrap pieces to become lodged in open spaces is minimized.

The guide blade is also a wear plate or pressure plate 34
This pressure plate is removably attached to the side surface of the guide plate 28 at its outer end with bolts or the like. The pressure plate 34 is arranged so that the upper shear blade 21 moves downwardly across the lower shear blade.
Then, when it swings into the open slot 29,
Engages the pressure plate or wear plate 26 of the upper shear blade 21. Another pressure pad 35 is mounted on the mounting plate 16 to the right of the upper shear blade 21 and above the pivot 15 in sliding engagement with the forward portion of the plate 19. Pressure pad 35 is adjustable by screw 35.1 and applies a force against upper jaw 14 as shear blade 21 moves across lower shear blade 27, causing pressure pads 26, 34 to cooperate. The upper shearing blades can be maintained in shearing engagement with the lower shearing blades 27.

The guide blade 28 is fixed to the lower shear blade 27, and
By guiding the movement of the upper shearing blades 21 by the pressure plates 34, 26 and the pressure pad 35 moving towards the plate 39, the two shearing blades 21 are moved relative to each other during the downward shearing movement of the upper shearing blades 21. maintained in shear engagement. Furthermore, after shearing of the workpiece W is completed, the end of the workpiece remains supported on the upper edge of the guide plate 28, so that the workpiece does not need to be picked up from the ground before making the next cut. . The shear 10 and the date pass stick 11 then need only be swung in the direction of the arrow S to move the lower jaw under the workpiece, thus facilitating the next cutting operation. . Alternatively, the upper jaw 14 may be moved downwardly to grip the workpiece and pull it to a new position where the cut can be made.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a shearing machine attached to a date pass stick of a backhoe. FIG. 2 is another perspective view of the shear removed from the backhoe. Third
The figure is a side view of the shearing machine. Figure 4 is 4 in Figure 2.
FIG. 4 is a detailed cross-sectional view taken approximately along line -4. FIG. 5 is a detailed cross-sectional view taken approximately along line 5--5 in FIG. In the figure, 10... Strong shearing machine, 11... Date pass stick, 12... Hydraulic cylinder, 13
...Lower jaw part, 14... Upper jaw part, 16...
Mounting plate, 19...Rigidity plate, 21...
Shearing blade, 24, 25...Cutting insert, 26...
Pressure plate, 27... shearing blade, 28... guide blade, 31... rigid plate, 32, 33... insert, 34... pressure plate, 35... pressure pad.

Claims (1)

[Claims] 1. A powerful shearing machine that can be attached to the boom structure and hydraulic system of a backhoe, which has a lower jaw section, an upper jaw section, and these jaw sections interconnected so that they can be opened and closed. pivoting means, the lower jaw having attachment means for attaching to the boom structure, and the upper jaw attaching to the hydraulic system of the backhoe for opening and closing the upper jaw relative to the lower jaw. and a lower jaw having a rigid lower shearing blade and a rigid guide blade positioned along and spaced from the shearing blade, the lower shearing blade having a shearing edge. and having inner and outer portions oriented at oblique angles with respect to each other, the guide blade having a top surface having a spaced apart portion below the shearing cutting edge of the inner portion of the lower shearing blade; and the outer surfaces of the shear blades are adjacent to each other, and a rigid plate is mounted across the ends of the shear blade and the guide blade;
the outer ends of the guide blades are secured to each other, the upper jaw having an upper shear blade extending along the lower shear blade and having inner and outer portions oriented at oblique angles with respect to each other; is adapted to swing across the shearing blade in the lower jaw to shear the workpiece, and to shear the workpiece after being sheared by the shearing blade, the guide blade, and the shearing blade in the lower jaw. A powerful shearing machine characterized by being able to swing in the space between the top surface of a guide blade for receiving and supporting. 2. In the high-power shearing machine according to claim 1, pressure plates that can be slidably engaged with each other are attached to the upper shearing blade side and the guide blade side, respectively, and these pressure plates are attached to the upper shearing blade side. A powerful shearing machine characterized by pressing against each other during the shearing movement. 3. The powerful shearing machine according to claim 1, wherein the distance between the lower shearing blade and the guide blade is wider than the thickness of the upper shearing blade. 4. The high-power shearing machine according to claim 1, wherein the lower shearing blade has insert bars constituting the shearing cutting edge, and these insert bars have a depth in a direction away from the shearing cutting edge, and a guide A heavy shearing machine characterized in that the top surface of the blade is spaced below the shearing cutting edge at the inner portion of the lower shearing blade by a distance approximately equal to the depth of the insert bar. 5. The powerful shearing machine according to claim 4, characterized in that the top surface of the guide blade is also spaced below the shearing cutting edge of the outer portion of the lower shearing blade. 6. In the high-power shearing machine according to claim 1, the lower shearing blade has a certain width and a certain thickness, and the thickness is larger than the width to provide strength against shearing action. A high-power shearing machine characterized in that the top surface of the guide blade is spaced below the shearing cutting edge of the lower shearing blade by at least a distance equal to the thickness of the lower shearing blade.