DEMOLITION SHEARS

Abstract

Demolition shears include a lower jaw, an upper jaw pivotally mounted relative to the lower jaw, and a cutting blade having at least a first cutting edge and a second cutting edge, the cutting blade to be secured to one of the upper jaw and the lower jaw to expose the first cutting edge, and the cutting blade being repositionable to be secured to one of the upper jaw and the lower jaw to expose the second cutting edge.

Claims

1. A demolition shears, comprising: a lower jaw; an upper jaw pivotally mounted relative to the lower jaw; and a cutting blade having at least a first cutting edge and a second cutting edge, the cutting blade to be secured to one of the upper jaw and the lower jaw to expose the first cutting edge, the cutting blade being repositionable to be secured to one of the upper jaw and the lower jaw to expose the second cutting edge.

2. The demolition shears of claim 1, wherein: the cutting blade to be rotated about a first axis in a first direction to be repositioned to expose the second cutting edge.

3. The demolition shears of claim 2, wherein: the cutting blade to be rotated about a second axis perpendicular to the first axis to be repositioned to expose a third cutting edge of the cutting blade.

4. The demolition shears of claim 3, wherein: the cutting blade to be rotated about the first axis in a second direction opposite the first direction to be repositioned to expose a fourth cutting edge of the cutting blade.

5. The demolition shears of claim 1, wherein: the first cutting edge and the second cutting edge of the cutting blade each having a non-linear profile.

6. The demolition shears of claim 5, wherein: the non-linear profile of the first cutting edge and the second cutting edge of the cutting blade including a curvilinear portion.

7. The demolition shears of claim 6, wherein: the curvilinear portion of the first cutting edge and the second cutting edge of the cutting blade having a radius.

8. The demolition shears of claim 1, further comprising: a guide blade having a guide blade cutting edge, the guide blade to be secured to the lower jaw to expose the guide blade cutting edge.

9. The demolition shears of claim 1, further comprising: a cross blade having a first cross blade cutting edge and a second cross blade cutting edge opposite the first cross blade cutting edge, the cross blade to be secured to the lower jaw to expose the first cross blade cutting edge, the cross blade being repositionable to be secured to the lower jaw to expose the second cross blade cutting edge.

10. The demolition shears of claim 9, wherein: the first cross blade cutting edge and the second cross blade cutting edge of the cross blade each having a non-linear profile.

11. The demolition shears of claim 1, further comprising: a piercing tip having a front cutting edge and side cutting edges, the piercing tip to be secured to the upper jaw, the front cutting edge of the piercing tip having a non-linear profile.

12. A demolition shears, comprising: a lower jaw; an upper jaw pivotally mounted relative to the lower jaw; and a cutting blade having a first cutting edge, a second cutting edge, a third cutting edge, and a fourth cutting edge, the cutting blade to be positioned on one of the upper jaw and the lower jaw to expose the first cutting edge, the cutting blade to be rotated about a first axis in a first direction to be repositioned on one of the upper jaw and the lower jaw to expose the second cutting edge, the cutting blade to be rotated about a second axis perpendicular to the first axis to be repositioned on one of the upper jaw and the lower jaw to expose the third cutting edge, the cutting blade to be rotated about the first axis in a second direction opposite the first direction to be repositioned on one of the upper jaw and the lower jaw to expose the fourth cutting edge.

13. The demolition shears of claim 12, wherein: the first cutting edge, the second cutting edge, the third cutting edge, and the fourth cutting edge of the cutting blade each having a non-linear profile.

14. The demolition shears of claim 13, wherein: the non-linear profile including a curvilinear portion.

15. The demolition shears of claim 14, wherein: the curvilinear portion having a radius.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0003] FIGS. 1, 2 illustrate an example of demolition shears in accordance with the present disclosure.

[0004] FIGS. 3, 4, 5, 6, 7, 8A, 8B, 9A, 9B, 9C, 9D, 10A, 10B, 10C, 10D, 11, 12 illustrate an example of a cutting blade for demolition shears in accordance with the present disclosure.

[0005] FIGS. 13, 14, 15, 16, 17, 18 illustrate an example of a cross blade for demolition shears in accordance with the present disclosure.

[0006] FIGS. 19, 20, 21, 22 illustrate an example of a guide blade seat for demolition shears in accordance with the present disclosure.

DETAILED DESCRIPTION

[0007] In the following detailed description, reference is made to the accompanying drawings which form a part hereof, and in which is shown by way of illustration specific examples in which the disclosure may be practiced. It is to be understood that other examples may be utilized and structural or logical changes may be made without departing from the scope of the present disclosure. The following detailed description, therefore, is not to be taken in a limiting sense, and the scope of the present disclosure is defined by the appended claims.

[0008] FIGS. 1, 2 illustrate an example of demolition shears 100 in accordance with the present disclosure. In examples, the demolition shears 100 include a lower, fixed or stationary jaw 120 and an upper, movable jaw 130. In examples, the upper, movable jaw 130 is pivotally mounted (for example, via a pivot pin or other hinge mechanism) relative to the lower, fixed or stationary jaw 120. In examples, a linear actuator (for example, a pneumatic or hydraulic cylinder) articulates (drives) the upper, movable jaw 130 for pivoting movement relative to the lower, fixed or stationary jaw 120. In examples, the upper jaw 130 is closed against the lower jaw 120 by the linear actuator to shear a workpiece positioned between the upper jaw 130 and the lower jaw 120. In other examples, both the upper and lower jaws move relative to each other by respective actuators.

[0009] In examples, the demolition shears 100 include a housing 110 that supports the lower, fixed or stationary jaw 120, the upper, movable jaw 130, and the actuator (not shown). In examples, blade inserts (for example, cutting blades, a cross blade, and guide blades) are secured to the upper jaw 130 and/or the lower jaw 120 so as to be repositionable (indexable) and/or replaceable. In examples, the demolition shears 100 include a cutting side 102 and a guide side 104, such that one or more than one blade insert is provided at the cutting side 102 and one or more than one blade insert is provided at the guide side 104. For example, as disclosed herein, cutting blades are provided in the upper jaw 130 at the cutting side 102, cutting blades are provided in the lower jaw 120 at the cutting side 102, a guide blade is provided in the lower jaw 120 at the cutting side, and a guide blade is provided in the lower jaw 120 at the guide side 104.

[0010] In examples, the blade inserts include main cutting blades 140, a cross blade 150, and guide blades 160. In examples, the main cutting blades 140 are secured to the upper jaw 130 and the lower jaw 120, and are repositionable (indexable) and replaceable. In examples, the cross blade 150 is secured to the lower jaw 120, and is repositionable (indexable) and replaceable. In examples, the guide blades 160 are secured to the lower jaw 120, and are repositionable (indexable) and replaceable.

[0011] In examples, the main cutting blades 140 include upper main cutting blades 143 secured to the upper jaw 130 and lower main cutting blades 142 secured to the lower jaw 120. In examples, the main cutting blades 140 include main blade cutting edges 141, as disclosed herein. In examples, the cross blade 150 is secured to the lower jaw 120 and includes cross blade cutting edges 151, as disclosed herein. In examples, the guide blades 160 include a cutting side guide blade 162 secured to the lower jaw 120 and a guide side guide blade 163 secured to the lower jaw 120. In examples, the guide blades 160 include guide blade cutting edges 161, as disclosed herein.

[0012] In examples, the upper jaw 130 includes a piercing tip 170. In examples, the piercing tip 170 is replaceable and is secured to a tip or end of the upper jaw 130. In examples, the piercing tip 170 includes a front cutting edge 171 and side cutting edges 172. In examples, the lower main cutting blades 142, the cutting side guide blade 162, the cross blade 150, and the guide side guide blade 163 define a substantially continuous cutting edge of the lower jaw 120, and, in examples, the upper main cutting blades 143 and the piercing tip 170 define a substantially continuous cutting edge of the upper jaw 130.

[0013] In examples, the demolition shears 100 are configured to be attached to a boom structure of, for example, excavating or earth-moving excavation equipment. In examples, the demolition shears 100 are mated to the boom of the machinery via a mounting bracket or a rotational mounting adapter and rotational drive system. In examples, the demolition shears 100 are mated to the boom of the machinery via a mounting bracket 106.

[0014] FIGS. 3, 4, 5, 6, 7, 8A, 8B, 9A, 9B, 9C, 9D, 10A, 10B, 10C, 10D illustrate an example of a cutting blade for demolition shears in accordance with the present disclosure, such as the main cutting blades 140 of the demolition shears 100. In examples, the cutting blade, as an example of the main cutting blades 140, has a plate shape and includes opposite planar faces, opposite non-contact surfaces (with non-cutting edges) oriented substantially perpendicular to the planar faces, and opposite contact surfaces (with cutting edges) oriented substantially perpendicular to the planar faces.

[0015] As illustrated in the example of FIGS. 3, 4, 5, the upper jaw 130 includes upper cutting blade seats 132 to receive and position the upper main cutting blades 143 in the upper jaw 130. In examples, the main cutting blades 140, such as the upper main cutting blades 143, have a seating surface 144 that contacts the upper cutting blade seats 132 to position the upper main cutting blades 143 in the upper jaw 130. In examples, the upper cutting blade seats 132 have blade seat ends 133 to also position the upper main cutting blades 143 in the upper jaw 130. In examples, the upper main cutting blades 143 are secured to the upper jaw 130 by fasteners, such as bolts 139.

[0016] As illustrated in the example of FIG. 6, the lower jaw 120 includes lower cutting blade seats 122 to receive and position the lower main cutting blades 142 in the lower jaw 120. In examples, the main cutting blades 140, such as the lower main cutting blades 142, have a seating surface (not shown in FIG. 6) that contacts the lower cutting blade seats 122 to position the lower main cutting blades 142 in the lower jaw 120. In examples, the lower main cutting blades 142 are secured to the lower jaw 120 by fasteners, such as bolts 129.

[0017] As illustrated in the example of FIGS. 7, 8A, 8B, the main blade cutting edges 141 of the main cutting blades 140 include a first cutting edge (Cutting Edge 1), a second cutting edge (Cutting Edge 2), a third cutting edge (Cutting Edge 3), and a fourth cutting edge (Cutting Edge 4). In examples, the main cutting blades 140 may be rotated and indexed, as disclosed herein, such that each of the main blade cutting edges 141 (Cutting Edge 1, Cutting Edge 2, Cutting Edge 3, Cutting Edge 4) may be exposed when the main cutting blades 140 are positioned in the upper jaw 130 or the lower jaw 120.

[0018] More specifically, as illustrated in the example of FIGS. 9A, 9B, 9C, 9D, FIGS. 10A, 10B, 10C, 10D, the main cutting blade 140 is rotationally symmetrical and four-way indexable. In examples, the main cutting blade 140 is oriented (and positioned in the upper jaw 130 or the lower jaw 120) to expose a first cutting edge (Cutting Edge 1) (FIG. 9A). In examples, the main cutting blade 140 is rotated about a first axis (for example, rotated 180 degrees counterclockwise about Axis A oriented perpendicular to the planar faces) to expose a second cutting edge (Cutting Edge 2) (FIG. 9B). In examples, the main cutting blade 140 is rotated about a second axis (for example, rotated 180 degrees counterclockwise about Axis B oriented parallel to the planar faces) to expose a third cutting edge (Cutting Edge 3) (FIG. 9C). In examples, the main cutting blade 140 is rotated about the first axis (for example, rotated 180 degrees clockwise about Axis A oriented perpendicular to the planar faces) to expose a fourth cutting edge (Cutting Edge 4) (FIG. 9D).

[0019] Although illustrated and described as being rotated in a specific sequence (for example, FIGS. 9A, 9B, 9C, 9D), in examples, the main cutting blade 140 may be rotated (flipped or turned) in other sequences to expose the different main blade cutting edges 141 (when positioned in the upper jaw 130 or the lower jaw 120). In examples, the main cutting blade 140 may be positioned in a different location in the demolition shears (for example, the upper jaw 130 or the lower jaw 120, or different blade seat of the upper jaw 130 or the lower jaw 120) to expose the different cutting edges.

[0020] FIG. 11 illustrates an example of a cutting blade for demolition shears in accordance with the present disclosure, such as the main cutting blade 140 for the demolition shears 100, and FIG. 12 illustrates another example of a cutting blade for demolition shears in accordance with the present disclosure, such as a main cutting blade 140 for the demolition shears 100. In examples, the contact surfaces (and associated main blade cutting edges 141) of the main cutting blade 140 and the main cutting blade 140 have a non-linear profile. In examples, the non-linear profile of the contact surfaces (and associated main blade cutting edges 141) of the main cutting blade 140 and main cutting blade 140 includes a curvilinear or arced portion or region. In examples, the curvilinear or arced portion of the contact surfaces (and associated main blade cutting edges 141) has a radius (for example, Radius R of FIG. 11, Radius R1 and Radius R2 of FIG. 12). In examples, the curvilinear or arced portion of the contact surfaces (and associated main blade cutting edges 141) is formed of multiple radii (for example, Radius R1 and Radius R2 of FIG. 12). In examples, the non-contact surfaces (and associated non-cutting edges) of the main cutting blade 140 and the main cutting blade 140 may or may not include straight edges.

[0021] In examples, as illustrated in FIGS. 1, 2, 3, 4, 5, 6, two main cutting blades 140 are secured to the upper jaw 130 (for example, two upper main cutting blades 143), and two main cutting blades 140 are secured to the lower jaw 120 (for example, two lower main cutting blades 142). In examples, the main cutting blades 140 are fastened to the upper and lower jaws 130, 120 with the respective bolts 139, 129.

[0022] A cutting blade as disclosed herein, such as, for example, the main cutting blade 140, is four-way indexable and has non-linear cutting edge profiles. In examples, the non-linear cutting edge profile can be optimized for a more efficient cut and/or shaped to better protect the non-replaceable portion of the demolition shear body.

[0023] FIGS. 13, 14, 15, 16, 17, 18 illustrate an example of a cross blade for demolition shears in accordance with the present disclosure, such as the cross blade 150 of the demolition shears 100. In examples, the cross blade 150 includes a cross blade cutting edge 151 having non-linear profile. In examples, the non-linear profile of the cross blade 150 includes a curvilinear or arced portion or region. In examples, the curvilinear or arced portion of the cross blade 150 (and associated cross blade cutting edge 151) has a radius.

[0024] In examples, the profile of the cross blade cutting edge 151 of the cross blade 150 corresponds to a profile of the front cutting edge 171 of the piercing tip 170 of the upper jaw 130 of the demolition shears 100. In examples, the front cutting edge 171 of the piercing tip 170 (piercing tip front cutting edge) and a front wall 173 of the piercing tip 170 (piercing tip front wall) have a non-perpendicular feature relative to the main cutting blades 140. In examples, the cross blade cutting edge 151 of the cross blade 150 has a non-linear profile and the front cutting edge 171 of the piercing tip 170 has a non-linear profile. In examples, the non-linear profile of the cross blade cutting edge 151 of the cross blade 150 optimizes the function with the non-linear profile of the front cutting edge 171 of the piercing tip 170.

[0025] In examples, the cross blade 150 is removable from the lower jaw 120 and rotatable to expose multiple cutting edges (for example, Cross Blade Cutting Edge 1, Cross Blade Cutting Edge 2). In examples, as illustrated in FIG. 16, the cross blade 150 is rotatable 180 degrees (for example, clockwise about Axis C oriented perpendicular to a face of the cross blade 150) to expose opposite cutting edges (for example, Cross Blade Cutting Edge 1, Cross Blade Cutting Edge 2).

[0026] A cross blade as disclosed herein, such as, for example, the cross blade 150, has a face with a non-linear cross blade profile that corresponds to the non-linear front cutting edge 171 of the piercing tip 170. In examples, the non-linear cross blade profile helps to provide a more efficient cut with less wear on the replaceable piercing tip 170, less wear on the guide blades 160, and/or less wear on the cross blade 150.

[0027] FIGS. 19, 20, 21, 22 illustrate an example of a guide blade seat 180 for demolition shears in accordance with the present disclosure, such as the demolition shears 100. In examples, the guide blade seat 180 holds and positions a guide blade, such as the guide side guide blade 163 of the demolition shears 100, in the lower jaw 120 of the demolition shears 100 (for example, along an inside surface wall of the lower jaw 120). In examples, the guide blade seat 180 is removable from the lower jaw 120 and includes locking features 182 that position the guide blade seat 180 in the lower jaw 120.

[0028] In examples, the lower jaw 120 of the demolition shears 100 includes a guide blade seat pocket 124 that includes corresponding locking features 126 such that the locking features 182 of the guide blade seat 180 engage the corresponding locking features 126 of the guide blade seat pocket 124 to secure the guide blade seat 180 to the lower jaw 120. In examples, the locking features 182 of the guide blade seat 180 and the corresponding locking features 126 of the guide blade seat pocket 124 position or key the guide blade seat 180 relative to the guide blade seat pocket 124. In examples, the locking features 182 of the guide blade seat 180 include a protrusion or boss, and the corresponding locking features 126 of the guide blade seat pocket 124 include a bore or recess that receives the protrusion or boss.

[0029] In examples, the guide blade seat 180 and the guide blade seat pocket 124 of the lower jaw 120 are shaped and have corresponding profiles that lock the guide blade seat 180 into the lower jaw 120 (similar to interlocking puzzle pieces). In examples, the guide blade seat 180 is fastened to the lower jaw 120 with bolts 189, and the guide side guide blade 163 (as positioned within the guide blade seat 180) is fastened to the lower jaw 120 with bolts 169. In examples, the guide blade seat 180 includes a cross blade locking feature 188 (for example, an abutment) to secure the cross blade 150 in the lower jaw 120.

[0030] As illustrated in the example of FIGS. 21, 22, to position the guide blade seat 180 in the lower jaw 120, the guide blade seat 180 has a face or wall 183 that contacts the guide blade seat pocket 124 of the lower jaw 120, and the guide blade seat 180 has a seating surface 184 that contacts a contact surface 128 of the guide blade seat pocket 124. In examples, to position the guide side guide blade 163 in the guide blade seat 180, the guide blade seat 180 includes a pocket 185 with a back wall 186 and pocket seats 187.

[0031] A guide blade seat as disclosed herein, such as, for example, the guide blade seat 180, includes locking features 182 that engage corresponding locking features 126 of a guide blade seat pocket 124 of the lower jaw 120 of the demolition shears 100 to assist in positioning and securing the guide blade seat 180 to the lower jaw 120. In examples, the locking features 182 of the guide blade seat 180 and the corresponding locking features 126 of the guide blade seat pocket 124 help to prevent rotation of the guide blade seat 180 (and, therefore, the guide side guide blade 163 as secured to the guide blade seat 180) relative to the lower jaw 120. [0032] 100 demolition shears [0033] 102 cutting side [0034] 104 guide side [0035] 106 mounting bracket [0036] 110 housing [0037] 120 lower jaw [0038] 122 lower cutting blade seats [0039] 124 guide blade seat pocket [0040] 126 locking features [0041] 128 contact surface [0042] 129 bolts [0043] 130 upper jaw [0044] 132 upper cutting blade seats [0045] 133 blade seat ends [0046] 139 bolts [0047] 140 main cutting blades [0048] 140 main cutting blades [0049] 141 main blade cutting edges [0050] 142 lower main cutting blades [0051] 143 upper main cutting blades [0052] 144 seating surface [0053] 150 cross blade [0054] 151 cross blade cutting edges [0055] 160 guide blades [0056] 161 guide blade cutting edges [0057] 162 cutting side guide blade [0058] 163 guide side guide blade [0059] 169 bolts [0060] 170 piercing tip [0061] 171 front cutting edge [0062] 172 side cutting edges [0063] 173 front wall [0064] 180 guide blade seat [0065] 182 locking features [0066] 183 wall [0067] 184 seating surface [0068] 185 pocket [0069] 186 back wall [0070] 187 pocket seats [0071] 188 cross blade locking feature [0072] 189 bolts [0073] Axis A [0074] Axis B [0075] Axis C [0076] Radius R [0077] Radius R1 [0078] Radius R2

[0079] Although specific examples have been illustrated and described herein, it will be appreciated by those of ordinary skill in the art that a variety of alternate and/or equivalent implementations may be substituted for the specific examples shown and described without departing from the scope of the present disclosure. This application is intended to cover any adaptations or variations of the specific examples discussed herein. Therefore, it is intended that this disclosure be limited only by the claims and the equivalents thereof.