GB2546155B - Loading vehicle attachment with rounded steel fold portion - Google Patents
Loading vehicle attachment with rounded steel fold portion Download PDFInfo
- Publication number
- GB2546155B GB2546155B GB1619929.1A GB201619929A GB2546155B GB 2546155 B GB2546155 B GB 2546155B GB 201619929 A GB201619929 A GB 201619929A GB 2546155 B GB2546155 B GB 2546155B
- Authority
- GB
- United Kingdom
- Prior art keywords
- loading vehicle
- vehicle attachment
- attachment according
- millimetres
- grade
- 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.)
- Active
Links
- 229910000831 Steel Inorganic materials 0.000 title description 2
- 239000010959 steel Substances 0.000 title description 2
- 239000002184 metal Substances 0.000 claims description 27
- 230000001154 acute effect Effects 0.000 claims description 10
- 229910000746 Structural steel Inorganic materials 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 241001417527 Pempheridae Species 0.000 description 1
- 229910000797 Ultra-high-strength steel Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C3/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith and intended primarily for transmitting lifting forces to loose materials; Grabs
- B66C3/04—Tine grabs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
- B21D5/08—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles making use of forming-rollers
-
- 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
- E02F3/413—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets with grabbing device
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Connection Of Plates (AREA)
- Automobile Manufacture Line, Endless Track Vehicle, Trailer (AREA)
Description
Loading Vehicle Attachment with rounded steel fold portion
Field of the Invention
The invention relates to loading vehicle attachments
Background to the Invention and Prior Art known to the Applicants
The Applicants manufacture a range of loading vehicle attachments which comprise for example buckets, grabbers, forks, sweepers, skips and collectors. These are generally suitable for attachment to a vehicle. The vehicles to which these attachments are secured maybe road going work vehicles. In certain embodiments the term vehicle may appropriately include sea and snow going vehicles. When applied to particularly heavy duty work vehicles any improvement in the structure of the loading vehicle attachments will enhance the load bearing capabilities, the efficiency with which the load is carried and the durability of the loading vehicle attachment when submitted, in use, to repetitive significant stresses and strains. One of the problems which the invention addresses is to improve the toughness and strength of such loading vehicle attachments. As part of this common inventive concept, the invention also provides the tools required in the production of loading vehicle attachments which are able to possess greater toughness and overall structural efficiency.
Summary ofthe Invention
In a broad independent aspect, the invention provides a loading vehicle attachment comprising a load carrier suitable for attachment to a vehicle; said load carrier comprising one or more walls within which at least part of said load is carried; one of said walls being a rear panel spacing apart a first lateral shoulder and a second lateral shoulder; said carrier comprising an exposed forward-most edge incorporating a rounded fold portion of a single folded sheet of metal extending between said first lateral shoulder and said second lateral shoulder; wherein said sheet of metal comprises a structural steel with a yield strength grade greater than S275, and a thickness of 4 to 10 millimetres; and wherein said rounded fold portion possesses an inner radius of 17 to 25 millimetres.
This configuration is particularly advantageous in terms of providing a particularly robust and tough fold portion which serves it improve in turn the robustness and toughness ofthe loading vehicle attachment which incorporates such a fold portion. It also provides improved distribution of concentrations of stresses and strains. It allows for a reduction of any permanent yielding or plastic deformation of the structure for enhanced longevity or life cycle of the attachment.
In a subsidiary aspect, the grade is greater than S355 and lower than S875.
In a further subsidiary aspect, the grade is greater than S400 and lower than S700.
In a further subsidiary aspect, the grade is greater than S400 and lower than S450.
In a further subsidiary aspect, the grade is greater than S575 and lower than S625.
In a further subsidiary aspect, the thickness is of 4 to 5 millimetres.
In a further subsidiary aspect, the thickness is of 8 to 10 millimetres.
In a further subsidiary aspect the loading vehicle attachment further comprises a first wing and a second wing formed by the sheet metal and projecting from both sides of the fold portion and forming an acute angle between the wings.
In a further subsidiary aspect, the folded portion has an inner radius of 17 to 25 millimetres.
Preferably, the folded portion has an inner radius of substantially 21 millimetres.
In a further subsidiary aspect, the acute angle is of 30 to 60 degrees.
Preferably, the acute angle is of 40 to 45 degrees.
Brief Description of the Figures
Figure 1 shows a perspective view of a loading vehicle attachment in accordance with an embodiment of the invention.
Figure 2 shows a side elevation ofthe loading vehicle attachment of Figure 1.
Figure 3 shows a perspective view of a portion of a jaw of the loading vehicle attachment of Figures 1 and 2.
Figure 4 shows a cross-sectional view of a folded sheet metal portion of the kind shown in Figure 3.
Figure 5 shows a perspective view of a die of a folding press suitable for folding a metal sheet.
Figure 6 shows a cross-sectional view across a pair of oppositely disposed load bearing rollers.
Figure 7 shows a further embodiment of a die of a folding press where the die may be employed to fold sheet metal with a more acute angle than the angle achieved in the preceding embodiment.
Figure 8 shows a cross-sectional view through opposite load bearing rollers of a die of a folding tool in accordance with the embodiment of Figure 7.
Detailed Description of the Figures
Figure 1 shows a loading vehicle attachment generally referenced 1. The loading vehicle attachment of Figure 1 takes the form of a grabber with an upper jaw 2 and a lower jaw 3. The upper jaw 2 incorporates a folded sheet metal portion 4 which extends across the width of the grabber. The folded sheet metal portion 4 is secured to a lateral arm 5 (as best illustrated in figure 2) which at its forward most extremity 6 forms a web which fits between upper wing 7 and lower wing 8 of the folded sheet metal portion. The folded sheet metal portion 4 has a rounded forward most fold portion 9. The lateral arm 5 has at its rear most extremity a primary pivot point 10 which allows the lateral arm 5 to pivot relative to a lateral plate 11 which forms a junction member between the upper jaw 2 and the lower jaw 3. A ram or hydraulic actuator 12 may be provided between a lower portion of the plate 11 and the upper most portion of the rear most extremity of arm 5 where a further pivot point 13 is provided. The ram or hydraulic actuator may be provided between pivot point 13 and a further pivot point 14 on the central plate 11. By actuating the ram or hydraulic actuator jaw 2 may be displaced between a relatively open position and a relatively closed position as shown in Figure 2. Further opening and closing of the jaw may be achieved by appropriate actuation.
The lower jaw 3 is formed by a succession of tines such as tine 15 which are regularly spaced. Each tine substantially extends in a longitudinal direction with a forward most tip. The tip may end with a rounded surface. Advantageously, the lower surface of each tine may incorporate a slight recess. Each one of the tines of the lower jaw is secured to a cross-piece 17 extending between lateral plates such plate 11. The cross-piece 17 possesses a plurality of apertures through which the tines are secured. A rear panel 18 is provided in order to prevent the contents exiting to the rear. The rear panel converges towards a line 19 which separates two substantially flat surfaces. Plate 18 also possesses a number of apertures such as apertures 20 which have triangular aspects. Furthermore, a wedge shaped aperture 21 is provided in an upper plate 22. A similarly shaped but oppositely orientated aperture 23 is provided in a position spaced from the first aperture 21.
The upper jaw 2 also carries a plurality of tines 24 which are shaped as a bow or arc. The forward most surface 25 and the rear most surface 26 converge towards a tip 27. At extremity 28 tine 24 bisects the upper and lower wings 7 and 8 of the folded sheet metal portion. Furthermore extremity 28 of the tine is secured permanently to the upper jaw. A plurality of tines of this kind are provided in spaced apart locations projecting from the folded sheet metal portion. Appropriate fasteners may be provided for attaching preferably permanently the tines to the upper jaw.
In order to accommodate, each one of these tines the folded sheet metal portion 4 incorporates a series of apertures or holes such as hole 29 (as shown in Figure 3) corresponding holes may be provided in both upper wing 7 and lower wing 8 of the folded sheet metal portion 4. Integrally formed with the folded metal sheet portion are shoulders 30 and 31 which are located on either side of the grabber and will be positioned within lateral arms such as lateral arm 5. An attachment member 33 (as shown in Figure 2) may be provided to secure the loading vehicle attachment to a work vehicle or any other appropriate vehicle. A bore or hole 32 provides the option for an axle to be secured. The recessed portion 34 which may itself present a concave or arc shaped surface may also be provided to engage an appropriate vehicle counterpart.
Figure 4 shows the folded sheet metal portion 4 with an inner radius 6 of 21mm and an upper wing 7 and a lower wing 8 defining an acute angle of 41 degrees. In one embodiment, the folded sheet metal portion has a thickness of 8 millimetres with the sheet metal being of a structural steel with a yield strength grade of S420.
In alternative embodiments, the yield strength grade may be greater than S275 whilst the thickness may be of 8 to 10 millimetres. In alternative embodiments, the folded portion may possess an inner radius of 17 to 25 millimetres.
In a further embodiment, the grade is greater than S355 and lower than S875. In a further embodiment, the grade is greater than S400 and lower than S700. In a further embodiment, the grade is greater than S400 and lower than S450. In an alternative embodiment, the grade is greater than S575 and S625. In an alternative embodiment, the acute angle is between 30 and 60 degrees. In a further embodiment, the acute angle is between 40 and 45 degrees. In a further embodiment, the sheet is of 8 millimetres in thickness and is of a grade of S600 of so-called ultra-high strength steel. In a further embodiment, the sheet is of 4 to 5 millimetres with a grade of S600.
The grade values may alternatively be expressed as minimum yield strength values with the numbers indicated previously accompanied with their units of N/mm2 when a metal sheet of 18 millimetres thick is assessed. In other words S275 corresponds to 275N/mm2. Whilst the preceding embodiment discusses specifically a grabber with a folded sheet portion.
Figure 5 shows a die 35 of a press for folding sheet metal. For simplicity, since these presses are generally of a known kind, this detailed description focuses on the aspects of the die which are new as opposed to the conventional components of typical presses such as their pressure applying punches and other potential sheet feeding and handling devices. Die 35 comprises a block 36 with a base portion 37 and two oppositely disposed lateral walls 38 and 39. Walls 38 and 39 possess a castellation in their upper most region for receiving a plurality of load bearing rollers such as roller 40. A central shaft 41 extends from the outer most mount 42 to at least a first spacer 43. In a preferred embodiment, the central shaft 41 extends through each one of the spacers 43 provided between the various rollers and is secured to mount 44. Each one of the spacers such as spacer 43 may incorporate an angled corner 45. A pin 46 may be employed to secure the central shaft 41 in its position. Further such pins may be provided as appropriate at different locations of the tool. Each one of the rollers such as roller 47 may be a single piece of cylindrical bearing material. In preferred embodiments however the load bearing rollers incorporate an outer annular bearing 48 which surrounds a plurality of bearing rods 49 which may extend the width of the outer annular bearing 48. Each one of these rods may be elongate cylindrical members. These may either be disposed in a closely contiguous manner or appropriately spaced apart. The invention also envisages that the rods may be replaced by spherical components or a plurality of spherical components disposed between the outer annular bearing and an inner annular bearing 50. An inner annular bearing may be provided to be secured onto the central shaft 41. Block 36 may incorporate an elongate mount 51 extending across the block to facilitate the attachment of the block to a receiving portion of a folding press. In order to provide additional strength to the structure of the block the lateral walls 38 and 39 are reinforced by a thickened portion 52 and 53 which present a 45 degree tapered face. The combination of the walls 38 and 39 together with the base 37 form an overall U-shaped configuration, with in a preferred embodiment, facets 52 and 53 in the junction region between wall 38 and base 37. These combine to form the cavity into which a sheet of metal is folded as the folding press employs an appropriately shaped punch to pressure the sheet into a permanently folded configuration.
As best seen in Figure 6, the outer annular bearing 48 is exposed in all directions other than directly underneath the bearing so that an operator may readily rest a metal sheet onto the rollers which allow straightforward displacement of the metal sheet into position prior to the folding operation. During folding, the lower surface of the metal sheet which is in contact with the load bearing rollers avoids damage as the sheet is pressed into the cavity of the die due to the action of the punch (not shown). Once the sheet has been folded any elastic displacement of the sheet against the load bearing rollers would not lead to damage of the engaging surface.
In the embodiment of Figure 7, a similarly structured die is provided as just described in Figures 5 and 6. Identical components have not been described for simplicity. Die 54 provides a much narrower cavity 55 when contrasted with the much wider cavity of die 35. It has a block 56 where the upper casteliations have an inclined surface 57. A pin 58 may also be provided to secure a central shaft 59. Other characteristics appear to be identical to those described with reference to Figures 5 and 6.
Claims (11)
1. A loading vehicle attachment comprising a load carrier suitable for attachment to a vehicle; said load carrier comprising one or more walls within which at least part of said load is carried; one of said walls being a rear panel spacing apart a first lateral shoulder and a second lateral shoulder; said carrier comprising an exposed forward-most edge incorporating a rounded fold portion of a single folded sheet of metal extending between said first lateral shoulder and said second lateral shoulder; wherein said sheet of metal comprises a structural steel with a yield strength grade greater than S275, and a thickness of 4 to 10 millimetres; and wherein said rounded fold portion possesses an inner radius of 17 to 25 millimetres.
2. A loading vehicle attachment according to claim 1, wherein said grade is greater than S355 and lower than S875.
3. A loading vehicle attachment according to either claim 1 or claim 2, wherein said grade is greater than S400 and lower than S700.
4. A loading vehicle attachment according to claim 3, wherein said grade is greater than S400 and lower than S450.
5. A loading vehicle attachment according to claim 3, wherein said grade is greater than S575 and lower than S625.
6. A loading vehicle attachment according to any of claims 1 to 5 wherein said thickness is of 4 to 5 millimetres.
7. A loading vehicle attachment according to any of claims 1 to 5, wherein said thickness is of 8 to 10 millimetres.
8. A loading vehicle attachment according to any of claims 1 to 5, further comprising a first wing and a second wing formed by said sheet metal and projecting from both sides of said fold portion and forming an acute angle between said wings.
9. A loading vehicle attachment according to any of claims 1 to 8, wherein said fold portion has an inner radius of substantially 21 millimetres.
10. A loading vehicle attachment according to claim 8 or a combination of claim 8 and claim 9, wherein said acute angle is of 30 to 60 degrees.
11. A loading vehicle attachment according to claim 10, wherein said acute angle is of 40 to 45 degrees.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1520995.0A GB2544794B (en) | 2015-11-27 | 2015-11-27 | Loading vehicle attachments |
Publications (3)
Publication Number | Publication Date |
---|---|
GB201619929D0 GB201619929D0 (en) | 2017-01-11 |
GB2546155A GB2546155A (en) | 2017-07-12 |
GB2546155B true GB2546155B (en) | 2019-06-26 |
Family
ID=55177366
Family Applications (4)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1520995.0A Active GB2544794B (en) | 2015-11-27 | 2015-11-27 | Loading vehicle attachments |
GB1609763.6A Active GB2544833B (en) | 2015-11-27 | 2016-06-03 | Loading vehicle attachments |
GB1609762.8A Active GB2544832B (en) | 2015-11-27 | 2016-06-03 | Dies, folding presses and methods of folding a metal sheet |
GB1619929.1A Active GB2546155B (en) | 2015-11-27 | 2016-11-24 | Loading vehicle attachment with rounded steel fold portion |
Family Applications Before (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1520995.0A Active GB2544794B (en) | 2015-11-27 | 2015-11-27 | Loading vehicle attachments |
GB1609763.6A Active GB2544833B (en) | 2015-11-27 | 2016-06-03 | Loading vehicle attachments |
GB1609762.8A Active GB2544832B (en) | 2015-11-27 | 2016-06-03 | Dies, folding presses and methods of folding a metal sheet |
Country Status (1)
Country | Link |
---|---|
GB (4) | GB2544794B (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4365428A (en) * | 1980-11-24 | 1982-12-28 | J. I. Case Company | Bucket mounted footing tool |
KR20010067912A (en) * | 2001-04-06 | 2001-07-13 | 손종인 | Tooth-cover of bucket for excavators |
US20040216335A1 (en) * | 2003-04-30 | 2004-11-04 | Esco Corporation | Wear assembly for excavator digging edge |
US20100308609A1 (en) * | 2007-08-31 | 2010-12-09 | Lavalley Industries, Llc | Gripping assembly and gripping members for a grapple attachment |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH0428419A (en) * | 1990-05-24 | 1992-01-31 | Nkk Corp | Female die of jig for press bending |
US6718662B1 (en) * | 2002-05-06 | 2004-04-13 | Timothy Schaff | Do-all rake-tooth bucket extension attachment |
FR2916991B1 (en) * | 2007-06-11 | 2010-01-22 | Tech Metalliques Appliquees T | DEVICE FOR FOLDING A LONG SHEET OF A GENERATOR |
US8449241B2 (en) * | 2010-03-29 | 2013-05-28 | Ronald M. Fritsch | Grapple for a skid steer loader |
CN201618805U (en) * | 2010-04-06 | 2010-11-03 | 安徽力源数控刃模具制造有限公司 | Roller integrated non-indentation subsection lower die device |
CN202162238U (en) * | 2011-06-21 | 2012-03-14 | 青岛变压器集团有限公司 | Special tool for steel plate bending |
CN103203412B (en) * | 2013-04-28 | 2015-10-28 | 马鞍山市辰兴机械制造有限公司 | The segmentation roller free bending mould of a kind of large-scale corrugated workpiece bending |
CN203887042U (en) * | 2014-04-04 | 2014-10-22 | 慈溪市启诺贸易有限公司 | Plate bending mold |
CN204448927U (en) * | 2014-12-18 | 2015-07-08 | 重庆天业模具冲压制造有限公司 | Friction feeding extrusion body |
CN205020636U (en) * | 2015-08-14 | 2016-02-10 | 上海东普起重机械有限公司 | U type bolt forming die |
CN205236781U (en) * | 2015-12-15 | 2016-05-18 | 中铁隆昌铁路器材有限公司 | Omega type bullet strip automated production early prototyping frock |
CN205393328U (en) * | 2016-03-10 | 2016-07-27 | 重庆豪斯特汽车零部件有限公司 | Car seat headrest pole impact bend mould |
-
2015
- 2015-11-27 GB GB1520995.0A patent/GB2544794B/en active Active
-
2016
- 2016-06-03 GB GB1609763.6A patent/GB2544833B/en active Active
- 2016-06-03 GB GB1609762.8A patent/GB2544832B/en active Active
- 2016-11-24 GB GB1619929.1A patent/GB2546155B/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4365428A (en) * | 1980-11-24 | 1982-12-28 | J. I. Case Company | Bucket mounted footing tool |
KR20010067912A (en) * | 2001-04-06 | 2001-07-13 | 손종인 | Tooth-cover of bucket for excavators |
US20040216335A1 (en) * | 2003-04-30 | 2004-11-04 | Esco Corporation | Wear assembly for excavator digging edge |
US20100308609A1 (en) * | 2007-08-31 | 2010-12-09 | Lavalley Industries, Llc | Gripping assembly and gripping members for a grapple attachment |
Also Published As
Publication number | Publication date |
---|---|
GB2544794A (en) | 2017-05-31 |
GB2544833B (en) | 2018-04-11 |
GB2544833A (en) | 2017-05-31 |
GB2546155A (en) | 2017-07-12 |
GB201520995D0 (en) | 2016-01-13 |
GB201609762D0 (en) | 2016-07-20 |
GB201609763D0 (en) | 2016-07-20 |
GB2544832B (en) | 2019-01-23 |
GB2544832A (en) | 2017-05-31 |
GB201619929D0 (en) | 2017-01-11 |
GB2544794B (en) | 2018-08-01 |
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