GB2461595A - Silage shear grab - Google Patents

Silage shear grab Download PDF

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Publication number
GB2461595A
GB2461595A GB0812317A GB0812317A GB2461595A GB 2461595 A GB2461595 A GB 2461595A GB 0812317 A GB0812317 A GB 0812317A GB 0812317 A GB0812317 A GB 0812317A GB 2461595 A GB2461595 A GB 2461595A
Authority
GB
United Kingdom
Prior art keywords
ram
grab
front wall
upper jaw
shear
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB0812317A
Other versions
GB0812317D0 (en
GB2461595B (en
Inventor
Samuel Joseph Hughes
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
REDROCK ENGINEERING Ltd
Original Assignee
REDROCK ENGINEERING Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by REDROCK ENGINEERING Ltd filed Critical REDROCK ENGINEERING Ltd
Priority to GB0812317.6A priority Critical patent/GB2461595B/en
Publication of GB0812317D0 publication Critical patent/GB0812317D0/en
Priority to IE20090510A priority patent/IE20090510A1/en
Publication of GB2461595A publication Critical patent/GB2461595A/en
Application granted granted Critical
Publication of GB2461595B publication Critical patent/GB2461595B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01F—PROCESSING OF HARVESTED PRODUCE; HAY OR STRAW PRESSES; DEVICES FOR STORING AGRICULTURAL OR HORTICULTURAL PRODUCE
    • A01F25/00—Storing agricultural or horticultural produce; Hanging-up harvested fruit
    • A01F25/16—Arrangements in forage silos
    • A01F25/20—Unloading arrangements
    • A01F25/2027—Unloading arrangements for trench silos
    • A01F25/2036—Cutting or handling arrangements for silage blocks
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/40—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets
    • E02F3/402—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets with means for facilitating the loading thereof, e.g. conveyors
    • E02F3/404—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets with means for facilitating the loading thereof, e.g. conveyors comprising two parts movable relative to each other, e.g. for gripping
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01F—PROCESSING OF HARVESTED PRODUCE; HAY OR STRAW PRESSES; DEVICES FOR STORING AGRICULTURAL OR HORTICULTURAL PRODUCE
    • A01F25/00—Storing agricultural or horticultural produce; Hanging-up harvested fruit
    • A01F25/16—Arrangements in forage silos
    • A01F25/20—Unloading arrangements
    • A01F25/2027—Unloading arrangements for trench silos
    • A01F2025/2081—Hydraulic features of the trench silos unloading devices, e.g. hydraulic circuits

Abstract

A shear grab for cutting and delivering silage comprises upper20and lower10jaws connected for pivotal movement relative to one another between an open configuration and a closed configuration, at least one ram40, 42, 44(which may be hydraulic) extending between the upper20and lower10jaws for moving the jaws10, 20between their open and closed configurations, means50, 52, 54being provided for shielding at least a portion said at least one ram40, 42, 44especially the piston rods41, 43, 45from material within the grab. The shielding means may be a finger, plate or gusset forming part of the upper jaw20. The upper jaw20may have a front wall22and rearwardly extending side walls24, 26. The shielding means may be tapered from the front wall22in a rearward direction. The at least one ram40, 42, 44may extend from an upper region of the lower jaw 10 to an upper region of the front wall22. There may be two or three rams each having an associated shielding means. The front wall22may have a silage cutting edge29and the lower jaw may have a plurality of parallel tines12.

Description

Si1ae Shear Grab The present invention relates to an improved shear grab for cutting and delivering silage.
Silage shear grabs are used for cutting a removing a block of silage from a silage clamp for delivering the silage to animals. Silage shear grabs are typically mounted on an agricultural tractor, either on a rear three point linkage or on a front loader.
A typical known silage shear grab comprises a lower jaw, comprising a plurality of parallel tines extending forwardly from a substantially vertical rear wall, and an upper jaw, comprising a front wall and a pair of side walls, the upper jaw having an open upper wall. A cutting edge or row of teeth is usually provided along a lower edge of the front wall for biting into the silage. The upper jaw is pivotally attached to the lower jaw to be movable relative to the lower jaw between an open configuration, in which the front wall of the upper jaw is spaced from the tines of the lower jaw, and a closed configuration, in which the jaws are closed to bite a substantially block of silage from a silage clamp. The upper and lower jaws are typically pivotally moved with respect to each other by one or more double acting hydraulic rams extending between the upper and lower jaws.
In use, the shear grab is driven into the silage with the jaw open until the tines of the lower jaw penetrate the silage. At this stage the upper jaw is in a raised position with the jaws in their open configuration. The hydraulic rams then close the jaws such that the front wall of the upper jaw cuts into the silage to separate a block of silage from the silage clamp. The shear grab is then removed from the silage with the block of silage contained therein.
A problem with known silage shear grabs is that the compressed silage rises inside the confines of the closed jaws of the shear grab and begins to foul on the hydraulic rams that actuate the jaws. Over a period of time this fouling cause's damage to the nose seal on the ram and ultimately oil leaks appear through this seal. Not only is the oil leaking a problem for the machine operating the shear grab it also damages the silage being fed to animals.
Accordingly, a first aspect of the present invention provides a shear grab for cutting and delivering silage comprising upper and lower jaws connected for pivotal movement relative to one another between an open configuration and a closed configuration, at least one ram extending between the upper and lower jaws for moving the jaws between their open and closed configurations, means being provided for shielding at least a portion said at least one ram from material within the grab.
Preferably said shielding means comprises a portion of at least one of the upper and lower jaws extending between at least a portion said at least one ram and an enclosed space defined by the jaws when in their c'osed configuration to shie'd or protect said at east one ram from fouling from silage within the grab.
Preferably said shielding portion comprises a flange, plate or gusset forming a part of the upper jaw. Said shielding portion may comprise a gusset provided to reinforce the structure of the upper jaw, said gusset being enlarged to shield said at least one ram.
Preferably said upper jaw comprises a front wall and at least two side walls extending rearwardly from opposed sides of the front wall, substantially perpendicular to the front wall. Preferably said at least one ram extends between said front wall and a region of said lower jaw, said protective portion comprising a plate or gusset extending substantially perpendicular to said side walls to lie between at least a forward end of said at least one ram and said space enclosed by the jaws. Preferably said plate or gusset extends rearwardly from said an upper region of the front wall of the upper jaw. Said plate or gusset may be tapered from the front wall of the upper jaw in a rearwards direction such that the plate or gusset has a reducing width in said rearwards direction.
Preferably silage cutting edges are provided along a lower edge of the front wall and lower edges of the side walls.
Preferably a plurality of parallel rams are provided extending between an upper region of the front wall of the upper jaw and an upper region of the lower jaw in order to provide an even closing force between the jaws, each ram being associated with a respective plate or gusset extending rearwardly from said front wall of the upper jaw, perpendicular to said side walls, to respectively lie between at least a forward end of the ram and said enclosed space.
First and second rams may be provided, one on each side of the shear grab adjacent each of said side walls of the upper jaw, each ram being associated with a respective plate or gusset extending between said front wall and a respective adjacent side wall of the upper jaw to respectively lie between a forward end of one of said rams and said enclosed space. Such shielding gussets may also serve to reinforce the upper jaw in the regions of the intersections of the front and side walls of the upper jaw.
In one embodiment, at least one further ram may be provided between said first and second rams, each of said further rams being associated with a further gusset extending rearwardly from the front wall. Preferably the or each further gusset is support by a further wall extending rearwardly from said front wall parallel to said side walls of the upper jaw.
Preferably a lower edge of said further wall defines a silage cutting edge.
In a preferred embodiment, three rams are provided, comprising a centrally located ram and first and second rams on either side of said centrally located ram adjacent each side wall of the upper jaw.
Said rams may be mounted such that said forward end of each ram protected by each respective shielding portion of the upper jaw comprises a piston rod of the ram.
Preferably the lower jaw comprises a plurality of parallel tines extending forwardly from a substantially vertical rear wall, and two side walls, said one or more rams extending between an upper region of said substantially vertical rear wall and an upper region of the front wall of the upper jaw. Preferably the lower jaw is pivotally attached to the upper jaw at respective lower regions of the side walls of the lower jaw about a main pivot axis that is substantially parallel to the longitudinal axis of said rear wall of the lower jaw.
An embodiment of the present invention will now be described, by way of example only, with reference to the accompanying drawings, in which:-Fig. 1 is a perspective view of a shear grab according to an embodiment of the present invention with the jaws in their open configuration; and Fig. 2 is a perspective view of the shear grab of Fig. 1 with the jaws in their closed configuration.
As illustrated in the drawings, a shear grab according to an embodiment of the present invention comprises a lower jaw 10 and an upper jaw 20, pivotally attached to one another for pivotal movement between an open configuration, as shown in Fig. 1, and a closed configuration, as shown in Fig. 2.
The lower jaw 10 comprises a plurality of parallel tines 12 extending forwardly from a substantially vertica' rear wall 14.
The upper jaw 20 comprises a front wall 22 and two side walls 24,26 and a centre wall 28, parallel to said side walls, extending rearwardly from the front wall, substantially normal to said front wall 22. A row of cutting teeth 29 is provided along a lower edge of the front wall 22 to enable the front wall 22 to cut into the silage.
The upper jaw 20 is pivotally attached to the rear wall 14 of the lower jaw 10 to pivot about a main pivot axis 30 that is substantially parallel to the longitudinal axis of said rear wall 14 of the lower jaw 10 to be movable relative to the lower jaw 10 between said open configuration, in which the front wall 22 of the upper jaw 20 is spaced from the tines 12 of the lower jaw 10, and said closed configuration, in which the jaws 10,20 are closed to bite a substantially block of silage from a silage clamp.
The upper and lower jaws 10,20 are pivotally moved with respect to each other by three parallel double acting hydraulic rams 40,42,44 extending between an upper region of the front wall 22 of the upper jaw 20 and an upper region of the rear wall 14 of the lower jaw 10.
In order to protect the exposed piston rods 41,43,45 of the hydraulic rams 40,42,44, gussets or plates 50,52,54 are provided on the upper jaw 20, extending rearwardly from the upper end of the front wall 22, perpendicular to the side walls 24,26 and central wall 28, to extend between the piston rods 41,43,45 of the rams 40,42,44 and the enclosed space defined by the jaws when in their closed configuration to protect the rams 40,42,44. The side gussets 50,54 extend between the front wall 22 and the side walls 24,26 of the upper jaw while the central gusset 52 extends from the front wall 22 and is supported by the central wall 28. The gussets 50,52,54 serve to reinforce the structure of the upper jaw 20 as well as shield and protect the rams 40,42,44, in particular the piston rods of the rams from fouling.
The gussets 50,52,54 are located to shield the piston rods 41,43,45 of the rams 40,42,44 when the jaws 10,20 of the shear grab are in their closed configuration such that silage trapped within the jaws does not come into direct contact with the piston rods, thus avoiding fouling of the piston rods 4 1,43,45 which might otherwise damage the oils seals of the ram and lead to leakage and also preventing any oil leakage from the rams 40,42,44 from contaminating the suiage.
The invention is not limited to the embodiment described herein but can be amended or modified without departing from the scope of the present invention.

Claims (20)

  1. Claims 1. A shear grab for cutting and delivering silage comprising upper and lower jaws connected for pivotal movement relative to one another between an open configuration and a closed configuration, at least one ram extending between the upper and lower jaws for moving the jaws between their open and closed configurations, means being provided for shielding at least a portion said at least one ram from material within the grab.
  2. 2. A shear grab as claimed in claim 1, wherein said shielding means comprises a shielding portion of at least one of the upper and lower jaws extending between at least a portion said at least one ram and an enclosed space defined by the jaws when in their closed configuration to shield or protect said at least one ram from fouling from silage within the grab.
  3. 3. A shear grab as claimed in claim 2, wherein said shielding portion comprises a Q flange, plate or gusset forming a part of the upper jaw. (0
    Q
  4. 4. A shear grab as claimed in claim 3, wherein said shielding portion comprises a 0) gusset provided to reinforce the structure of the upper jaw, said gusset being enlarged to C\J 20 shield said at least one ram.
  5. 5. A shear grab as claimed in any of claims 2 to 4, wherein said upper jaw comprises a front wall and at least two side walls extending rearwardly from opposed sides of the front wall, substantially perpendicular to the front wall.
  6. 6. A shear grab as claimed in claim 5, wherein said at least one ram extends between said front wall and a region of said lower jaw, said shielding portion comprising a plate or gusset extending substantially perpendicular to said side walls to lie between at least a forward end of said at least one ram and said space enclosed by the jaws.
  7. 7. A shear grab as claimed in claim 6, wherein said plate or gusset extends rearwardly from said an upper region of the front wall of the upper jaw.
  8. 8. A shear grab as claimed in claim 7, wherein said plate or gusset is tapered from the front wall of the upper jaw in a rearwards direction such that the plate or gusset has a reducing width in said rearwards direction.
  9. 9. A shear grab as claimed in any of claims 5 to 8, wherein silage cutting edges are provided along a lower edge of the front wall and lower edges of the side walls.
  10. 10. A shear grab as claimed in any of claims 5 to 9, wherein a plurality of parallel rams are provided extending between an upper region of the front wall of the upper jaw and an upper region of the lower jaw in order to provide an even closing force between the jaws, each ram being associated with a respective plate or gusset extending rearwardly from said front wall of the upper jaw, perpendicular to said side walls, to respectively lie between at least a forward end of the ram and said enclosed space.
  11. 11. A shear grab as claimed in claim 10, wherein first and second rams are provided, one Q on each side of the shear grab adjacent each of said side walls of the upper jaw, each ram being associated with a respective plate or gusset extending between said front wall and a Q respective adjacent side wall of the upper jaw to respectively lie between a forward end of one of said rams and said enclosed space.
    (\J 20
  12. 12. A shear grab as claimed in claim 11, wherein said shielding plates or gussets also serve to reinforce the upper jaw in the regions of the intersections of the front and side walls of the upper jaw.
  13. 13. A shear grab as claimed in claim 12 or claim 13, wherein at least one further ram is provided between said first and second rams, each of said further rams being associated with a further gusset extending rearwardly from the front wall.
  14. 14. A shear grab as claimed in claim 13, wherein the or each further gusset is support by a further wall extending rearwardly from said front wall parallel to said side walls of the upper jaw.
  15. 15. A shear grab as claimed in claim 14, wherein a lower edge of said further wall defines a silage cutting edge.
  16. 16. A shear grab as claimed in any of claims 10 to 15, wherein three rams are provided, comprising a centrally located ram and first and second rams on either side of said centrally located ram adjacent each side wall of the upper jaw.
  17. 17. A shear grab as claimed in claim 16, wherein said rams may be mounted such that said forward end of each ram protected by each respective shielding portion of the upper jaw comprises a piston rod of the ram.
  18. 18. A shear grab as claimed in any preceding claim, wherein the lower jaw comprises a plurality of parallel tines extending forwardly from a substantially vertical rear wall, and two side walls, said one or more rams extending between an upper region of said substantially vertical rear wall and an upper region of the front wall of the upper jaw.
  19. 19. A shear grab as claimed in claim 18, wherein the lower jaw is pivotally attached to Q the upper jaw at respective lower regions of the side walls of the lower jaw about a main pivot axis that is substantially parallel to the longitudinal axis of said rear wall of the lower Q jaw. a)C\J 20
  20. 20. A shear grab substantially as herein described with reference to the accompanying drawings.
GB0812317.6A 2008-07-07 2008-07-07 Silage shear grab Expired - Fee Related GB2461595B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB0812317.6A GB2461595B (en) 2008-07-07 2008-07-07 Silage shear grab
IE20090510A IE20090510A1 (en) 2008-07-07 2009-07-02 Silage shear grab

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0812317.6A GB2461595B (en) 2008-07-07 2008-07-07 Silage shear grab

Publications (3)

Publication Number Publication Date
GB0812317D0 GB0812317D0 (en) 2008-08-13
GB2461595A true GB2461595A (en) 2010-01-13
GB2461595B GB2461595B (en) 2013-01-30

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ID=39718020

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0812317.6A Expired - Fee Related GB2461595B (en) 2008-07-07 2008-07-07 Silage shear grab

Country Status (2)

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GB (1) GB2461595B (en)
IE (1) IE20090510A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3817567A (en) * 1972-06-08 1974-06-18 Lull Eng Co Inc Versatile utility carriage for mobile loaders
GB1536937A (en) * 1977-04-05 1978-12-29 Twose Of Tiverton Ltd Silage or like handling equipment
GB2048654A (en) * 1978-10-04 1980-12-17 Roche T Silage cutting apparatus
US4565485A (en) * 1982-12-21 1986-01-21 Wilman Thomas S Mechanical grab and scoop combination
WO1994023559A1 (en) * 1993-04-15 1994-10-27 William Taylor Attachment for a grab implement
US6820357B1 (en) * 2003-12-02 2004-11-23 Donald James Menard Multi-purpose tool for a front end loader of a tractor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3817567A (en) * 1972-06-08 1974-06-18 Lull Eng Co Inc Versatile utility carriage for mobile loaders
GB1536937A (en) * 1977-04-05 1978-12-29 Twose Of Tiverton Ltd Silage or like handling equipment
GB2048654A (en) * 1978-10-04 1980-12-17 Roche T Silage cutting apparatus
US4565485A (en) * 1982-12-21 1986-01-21 Wilman Thomas S Mechanical grab and scoop combination
WO1994023559A1 (en) * 1993-04-15 1994-10-27 William Taylor Attachment for a grab implement
US6820357B1 (en) * 2003-12-02 2004-11-23 Donald James Menard Multi-purpose tool for a front end loader of a tractor

Also Published As

Publication number Publication date
GB0812317D0 (en) 2008-08-13
GB2461595B (en) 2013-01-30
IE20090510A1 (en) 2010-01-06

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732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)

Free format text: REGISTERED BETWEEN 20110317 AND 20110323

PCNP Patent ceased through non-payment of renewal fee

Effective date: 20180707