EP2987918A1

EP2987918A1 - Removable pin stub

Info

Publication number: EP2987918A1
Application number: EP14181290.9A
Authority: EP
Inventors: Frank VAN KONINGSBRUGGE; John Van Gemert; Patrick Grant; Edward Van Amelsfoort; Carl MYERS
Original assignee: Caterpillar Work Tools BV
Current assignee: Caterpillar Work Tools BV
Priority date: 2014-08-18
Filing date: 2014-08-18
Publication date: 2016-02-24
Anticipated expiration: 2034-08-18
Also published as: WO2016026677A1; EP2987918B1

Abstract

A removable pin stub (20) for a jaw set (12) is disclosed. The removable pin stub (20) may be removably attached to the jaw set (12). The removable pin stub (20) comprises: a flange portion (26) having a first side (30) and a second side (32), the flange portion (26) having at least one through opening (34) extending from the first side (30) to the second side (32); and a stub portion (28) extending from the first side (30) of the flange portion (26).

Description

Technical Field

This disclosure relates to the field of tools for crushing and/or cutting material and more particularly to the field of tools having interchangeable jaw sets and frames adapted to receive the jaw sets.

Background

A device for crushing and/ or cutting material is generally known. The device may have a jaw set for example suitable for crushing concrete. A different jaw set may be used for crushing or cutting other materials, for example for cutting scrap iron and/or iron sections. Thus, different devices may be used for crushing or cutting different materials. The jaw sets may be interchangeable in order to be used for varying work requirements.
EP2578752 discloses a demolition apparatus and an adapter frame of the demolition apparatus. The demolition apparatus may have a jaw set having a first jaw and a second jaw. The first jaw may be pivotably coupled to the second jaw. The second jaw may be pivotable about the pivot pin. The ends of the pivot pin may protrude from both sides of the jaw set. The adapter frame may be formed with coupling seats that engage the ends of the pivot pin on the jaw set to assemble the demolition apparatus.
The present disclosure is directed, at least in part, to improving or overcoming one or more aspects of the prior art system.

Brief Summary of the Invention

In a first aspect, the present disclosure describes a removable pin stub for a jaw set. The removable pin stub may comprise: a flange portion having a first side and a second side, the flange portion having at least one through opening extending from the first side to the second side; and a stub portion extending from the first side of the flange portion.
In a second aspect, the present disclosure describes a jaw set comprising: a first jaw pivotally coupled to a second jaw at a pivot axis; and at least one removable pin stub fastened to the first jaw or the second jaw such that the stub portion protrudes from an outer surface of the jaw set.
In a third aspect, the present disclosure describes a demolition apparatus comprising: a jaw set having at least one removable pin stub; and a frame connectable to an arm of a machine, the frame having at least one coupling seat to engage the removable pin stub.

Brief Description of the Drawings

The foregoing and other features and advantages of the present disclosure will be more fully understood from the following description of various embodiments, when read together with the accompanying drawings, in which:

Fig. 1 is a side view of a jaw set assembly and a frame according to the present disclosure;
Fig. 2 is a section through the jaw set and a removable pin stub assembled with the frame; and
Fig. 3 is an alternate section through the jaw set and a pair of removable pin stubs assembled with the frame.

Detailed Description

This disclosure generally relates to a removal pin stub for a work tool. Fig. 1 illustrates a demolition apparatus 10. The demolition apparatus 10 may comprise a jaw set 12 and a frame 14. The jaw set 12 and the frame 14 may be mutually connectable. The jaw set 12 and the frame 14 may be configured for mutual connection.
With reference to Fig. 1, jaw set 12 may comprise a removable pin stub 20. The removable pin stub 20 may comprise a flange portion 26 and a stub portion 28. The flange portion 26 and the stub portion 28 may be monolithically formed. In an embodiment, flange portion 26 and stub portion 28 may be separately formed and subsequently connected to form the removable pin stub 20.
With reference to Fig. 2, flange portion 26 may be configured to engage a side of the jaw set 12 so as to be fixed thereto. The flange portion 26 may have a first side 30 and a second side 32. First side 30 may be substantially parallel to the second side 32. Edge 27 may be formed between the first side 30 and the second side 32. The first side 30 may have an inclined surface 29 formed at the periphery. Inclined surface 29 may surround first side 30. Inclined surface 29 may be interposed between the first side 30 and the edge 27.
The flange portion 26 may have at least one through opening 34 extending from the first side 30 to the second side 32. Flange portion 26 may be shaped as a disc. In an embodiment, flange portion 26 may have a plurality of through openings 34 arranged radially on the first side 30. The flange portion 26 may have a recess 31 positioned at the centre thereof. Recess 31 may create a clearance for the transition (radius) between the stub portion 28 and the flange first side 30. The transition may reduce any interference with the edges of seat 40 so as to prevent fatigue failure.
Flange portion 26 may have an aperture (not shown) positioned on the second side 32. The aperture may be centrally located on the second side 32. The position of the aperture on the second side 32 may correspond to the position of the stub portion 28 on the first side 30.
The stub portion 28 may be configured to engage a part of the frame 14. The stub portion 28 may extend from the first side 30 of the flange portion 26. Stub portion 28 may be centrally positioned on the flange portion 26. Stub portion 28 may be centrally positioned on the first side 30. Stub portion 28 may extend perpendicularly relative to the first side 30. The diameter of the stub portion 28 may be smaller than the dimensions of the flange portion 26. The diameter of the stub portion 28 may be smaller than the diameter of the flange portion 26.
Stub portion 28 may be positioned in the recess 31. Stub portion 28 may be formed as a rod. The plurality of through openings 34 may be radially arranged about the recess 31. The plurality of through openings 34 may be radially arranged about the stub portion 28.
With reference to Fig. 1, the jaw set 12 may comprise a first jaw 16 and a second jaw 18. The first jaw 16 and the second jaw 18 may be suitably provided for crushing concrete and/ or cutting iron sections.
In an embodiment, the first jaw 16 may comprise two spaced-apart and parallel plates 17. The plates 17 may be provided at an end of the first jaw 16. The first jaw 16 may be provided with crushing or cutting tools for crushing or cutting activity. The crushing or cutting tools may be connected to plates 17 of the first jaw 16. The crushing or cutting tools may be suitably configured for engaging with the second jaw 18 for crushing or cutting activity. In an embodiment, the crushing or cutting tools may be blades, teeth or any other form of material engaging component.
In an embodiment, the second jaw 18 may comprise two spaced-apart and parallel plates 19 at one end. The plates 19 may be provided at an end of the second jaw 18. The second jaw 18 may be provided with crushing or cutting tools for crushing or cutting activity. The crushing or cutting tools may be connected to plates 19 of the second jaw 18. The crushing or cutting tools may be suitably configured for engaging with the first jaw 16 for crushing or cutting activity. In an embodiment, the crushing or cutting tools may be blades, teeth or any other form of material engaging component.
With reference to Fig. 2, the first jaw 16 and the second jaw 18 may be pivotally connected. In an embodiment, the first jaw 16 and the second jaw 18 may be pivotally coupled together by a pivot pin 22. The pivot pin 22 may extend through the first jaw 16 and the second jaw 18 at the position of the pivotal connection. The pivotal connection may lie on a pivot axis 24. In an embodiment, the pivot axis 24 may be coincident with the longitudinal axis of the pivot pin 22.
In an embodiment, the first jaw 16 and the second jaw 18 may be retained on the pivot pin 22 without play along the length of the pivot pin 22. The first jaw 16 and the second jaw 18 may be retained on the pivot pin 22 so that lateral movement may be restricted and rotational movement may not be restricted.
The first jaw 16 and the second jaw 18 may each be provided with a passage to accommodate the pivot pin 22. In an embodiment, the plates 17, 19 may be provided with passages to accommodate the pivot pin 22.
The removable pin stub 20 may be fastened to the first jaw 16 or the second jaw 18. The stub portion 28 may protrude from an outer surface of the jaw set 12. Stub portion 28 may protrude from a side of the jaw set 12. Stub portion 28 may protrude perpendicularly with respect to the first jaw 16 and the second jaw 18.
The removable pin stub 20 may be positioned at the pivot axis 24. The removable pin stub 20 may be positioned on the jaw set 12 adjacent the pivot pin 22. The removable pin stub 20 may be positioned such that the pivot axis 24 extends through the centre of the stub portion 28. In an embodiment, an end of the pivot pin 22 may abut the second side 32 of the flange portion 26. Stub portion 28 may have the same diameter as the body of the pivot pin 22.
Removable pin stub 20 may be fastened to the jaw set 12. The removable pin stub 20 may be fastened to a surface of either the first jaw 16 or the second jaw 18. The flange portion 26 may be fastened to an outer surface of the jaw set 12. The outer surface of the jaw set 12 may be defined as the surface that is immediately adjacent the frame 14 when the jaw set 12 is coupled to the frame 14. With the removable pin stub 20 on the outer surface the stub portion 28 may be available for engagement with the frame 14.
The flange portion 26 may be fastened to an outer surface of either the first jaw 16 or the second jaw 18. Flange portion 26 may be bolted to the outer surface of either the first jaw 16 or the second jaw 18. With reference to Fig. 1, bolts 36 may be inserted through the through openings 34 to fasten the removable pin stub 20 to the first jaw 16 or the second jaw 18. The removable pin stub 20 may be removed by extracting the bolts 36.
The outer surface of the jaw set 12 may comprise a pocket 38 to receive the removable pin stub 20. The pocket 38 may be formed by extensions from the outer surface of the jaw set 12. The pocket 38 may engage the edge 27 of the flange portion 26.
With reference to Fig. 3, in an embodiment, a pair of removal pin stubs 20 may be positioned on opposite external surfaces of the jaw set 12. The respective stub portions 28 may extend in opposite directions. The respective stub portions 28 may be mutually aligned.
The pair of removal pin stubs 20 may be aligned on the pivot axis 24. The pair of removable pin stubs 20 may be positioned such that the pivot axis 24 extends through the centre of the respective stub portions 28. In an embodiment, opposite ends of the pivot pin 20 may abut the second sides 32 of the respective flange portions 26. The respective stub portions 28 may have the same diameter as the body of the pivot pin 22. In a further embodiment, the pivot pin 22 may be interposed by the pair of removable pin stubs 20.
The jaw set 12 may further comprise a coupling pin 42. The coupling pin 42 may be spaced from the pivotal connection of the first jaw 16 and the second jaw 18. The coupling pin 42 may be spaced from the pivot pin 22.
In an embodiment, the coupling pin 42 may extend through the second jaw 18. The second jaw 18 may be provided with a passage to accommodate the coupling pin 42. In an embodiment, the coupling pin 42 may extend through the plates 19 of the second jaw 18. The plates 19 may be provided with passages to accommodate the coupling pin 42.
In an alternate embodiment, the coupling pin 42 may be interposed by a pair of removal pin stubs 20. The opposite ends of the coupling pin 42 may abut the second sides 32 of the respective flange portions 26. The respective stub portions 28 may have the same diameter as the body of the coupling pin 42.
The demolition apparatus 10 may comprise the jaw set 12 and the frame 14 that is connectable to an arm of a machine (not shown). The frame 14 may have at least one coupling seat 40 to engage the removable pin stub 20. In an embodiment, the frame 14 may have a pair of coupling seats 40 to couple the pair of removable pin stubs 20.
The jaw set 12 may be coupled to the frame 14. The first jaw 16 may be movable connected to the second jaw 18 and the frame 14. The second jaw 18 may be fixedly connected to the frame 14. In an embodiment, the removable pin stub 20 may be positioned on the second jaw 18.
With reference to Fig. 1, the frame 14 may comprise a housing 44. The housing 44 may comprise spaced-apart frame plates 46. The frame plates 46 may be mutually parallel.
The frame plates 46 may be connected to an end plate 48. The end plate 48 may be connected to ends of the frame plates 46 at an end of the housing 44 to form a limit for void 50. The frame plates 46 may extend perpendicularly from the end plate 48. The end plate 48 may bound at least two sides of the frame plates 46. In an embodiment, the end plate 48 may be substantially L-shaped in cross section. The sides of the frame plates 46 not bound by the end plate 48 may expose the void 50 to the exterior of the housing 44.
A cylinder 52 may be positioned in the housing 44. The cylinder 52 may be positioned in the void 50 between the frame plates 46 and adjacent to the end plate 48. A piston rod head 54 may be positioned beyond the sides of frame plates 46 not bound by the end plate 48. The piston rod head 54 may extend in a direction away from the frame plates 46 and the housing 44. The direction of extension of piston rod head 54 may be parallel to the frame plates 46.
A mounting member 56 may be provided on the housing 44. The mounting member 56 may enable the frame 14 to connect to the arm of a machine, for example a jib of an excavator. The mounting member 56 may be suitably configured for the connection of the frame 14 to the machine arm. The mounting member 56 may be provided on the end plate 48. The mounting member 56 may be positioned adjacent the cylinder 52.
The coupling seat 40 may be positioned on the housing 44. The frame 14 may have a pair of coupling seats 40 to couple the pair of aligned removable pin stubs 20. The frame 14 may further comprise an engagement seat 58. The frame 14 may have a pair of engagement seats 58 to couple a further pair of aligned removable pin stubs 20.
The coupling seats 40 may form the first points of engagement of the jaw set 12 and the frame 14. The coupling seats 40 may engage a first pair of removable pin stubs 20 on the jaw set 12. The first pair of removable pin stubs 20 may be adjacent the pivot pin 22. The coupling seats 40 may have openings 51 to receive the first pair of removable pin stubs 20. The coupling seats 40 may be configured to receive the stub portions 28.
The engagement seats 58 may form the second points of engagement of the jaw set 12 and the frame 14. The engagement seats 58 may engage a second pair of removable pin stubs 20 on the jaw set 12. The second pair of removable pin stubs 20 may be adjacent the coupling pin 42. The engagement seats 58 may have openings 53 to receive the second pair of removable pin stubs 20. The engagement seats 58 may be configured to receive the stub portions 28.
The skilled person would appreciate that foregoing embodiments may be modified or combined to obtain the removable pin stub 20, the jaw set 12 and the demolition apparatus 10 of the present disclosure.

Industrial Applicability

This disclosure describes a removable pin stub 20. The removable pin stub 20 may be subject to forces generated in the jaw set 12. The forces may be transferred to the frame 14 through the removable pin stub 20 and may become worn. The worn removable pin stub 20 may be removed from the jaw set 12 and replaced with a new removable pin stub 20. The replacement may be effected without decoupling the first jaw 16 from the second jaw 18. The removable pin stubs 20 may be independently replaced. In the embodiment of the removal pin stub 20 being positioned at the pivot axis 24 the forces may not be transferred to the pivot pin 22.
Accordingly, this disclosure includes all modifications and equivalents of the subject matter recited in the claims appended hereto as permitted by applicable law. Moreover, any combination of the above-described elements in all possible variations thereof is encompassed by the disclosure unless otherwise indicated herein.
Where technical features mentioned in any claim are followed by reference signs, the reference signs have been included for the sole purpose of increasing the intelligibility of the claims and accordingly, neither the reference signs nor their absence have any limiting effect on the technical features as described above or on the scope of any claim elements.
One skilled in the art will realise the disclosure may be embodied in other specific forms without departing from the disclosure or essential characteristics thereof. The foregoing embodiments are therefore to be considered in all respects illustrative rather than limiting of the disclosure described herein. Scope of the invention is thus indicated by the appended claims, rather than the foregoing description, and all changes that come within the meaning and range of equivalence of the claims are therefore intended to be embraced therein.

Claims

A removable pin stub (20) for a jaw set (12), the removable pin stub (20) comprising:
a flange portion (26) having a first side (30) and a second side (32), the flange portion (26) having at least one through opening (34) extending from the first side (30) to the second side (32); and

a stub portion (28) extending from the first side (30) of the flange portion (26).
The removable pin stub (20) according to claim 1 wherein the stub portion (28) is centrally positioned on the flange portion (26).
The removable pin stub (20) according to claims 1 or 2 wherein the flange portion (26) has a plurality of through openings (34) radially arranged about the stub portion (28).
The removable pin stub (20) according to claims 1, 2 or 3 wherein the flange portion (26) has a form of a circular disc.
The removable pin stub (20) according to any of preceding claims wherein the flange portion (26) has a recess positioned on the second side (32).
A jaw set (12) comprising:
a first jaw (16) pivotally coupled to a second jaw (18) at a pivot axis (24); and

at least one removable pin stub (20) according to any one of preceding claims, the removable pin stub (20) being fastened to the first jaw (16) or the second jaw (18) such that the stub portion (28) protrudes from an outer surface of the jaw set (12).
The jaw set of claim 6 wherein the removable pin stub (20) is positioned at the pivot axis (24).
The jaw set of claim 6 or 7 wherein the removable pin stub (20) is fastened to an outer surface of the jaw set (12).
The jaw set of claims 6, 7 or 8 wherein the outer surface of the jaw set (12) comprises a pocket (38) to receive the removable pin stub (20).
The jaw set of claims 6, 7, 8 or 9 comprising a pair of removal pin stubs (20) positioned on opposite external surfaces of the jaw set (12).
The jaw set of claim 9 wherein the pair of removal pin stubs (20) aligned on the pivot axis (24).
The jaw set of claims 9 or 10 further comprising a pivot pin (22) pivotably coupling the first and second jaws (16, 18), the pivot pin (22) being interposed by the pair of removable pin stubs (20).
A demolition apparatus (10) comprising:
a jaw set (12) according to claims 6 to 12; and

a frame (14) connectable to an arm of a machine, the frame (14) having at least one coupling seat (40) to engage the removable pin stub (20).
The demolition apparatus of claim 13 wherein the removable pin stub (20) is positioned on the second jaw (18), the second jaw (18) being immovably connected to the frame (14).