US20140241786A1 - Safety device for quick-fit attachments used for fitting a tool to the end of the arm of a hydraulic excavator - Google Patents
Safety device for quick-fit attachments used for fitting a tool to the end of the arm of a hydraulic excavator Download PDFInfo
- Publication number
- US20140241786A1 US20140241786A1 US14/232,129 US201214232129A US2014241786A1 US 20140241786 A1 US20140241786 A1 US 20140241786A1 US 201214232129 A US201214232129 A US 201214232129A US 2014241786 A1 US2014241786 A1 US 2014241786A1
- Authority
- US
- United States
- Prior art keywords
- tool
- machine
- belonging
- finger
- slot
- 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.)
- Abandoned
Links
Images
Classifications
-
- 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
- E02F3/3604—Devices to connect tools to arms, booms or the like
- E02F3/3609—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat
-
- 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
- E02F3/3604—Devices to connect tools to arms, booms or the like
- E02F3/3609—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat
- E02F3/3627—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat with a hook and a longitudinal locking element
-
- 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
- E02F3/3604—Devices to connect tools to arms, booms or the like
- E02F3/3609—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat
- E02F3/3645—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat with auto-engagement means for automatic snap-on of the tool coupler part
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/24—Safety devices, e.g. for preventing overload
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T403/00—Joints and connections
- Y10T403/16—Joints and connections with adjunctive protector, broken parts retainer, repair, assembly or disassembly feature
Abstract
Safety device for quick-fit attachments comprising two parts (1) and (2), of which one (1) is borne by the arm of the digger while the other (2) is secured to the tool (for example a dipper), said first part having a cradle (3) formed by a pair of hooks, able to grasp hold of a shaft (4) belonging to the second part in order to raise the tool and allow the first part to pivot so that the two parts can be pressed against one another to allow for locking, characterized in that each part of the attachment has a member (7) able to collaborate with a member (8) of the other part if the weight of the tool being picked up does not exceed the capacity of the digger, collaboration being impossible when such is not the case, so that the first part is unable to be pressed against the second and locking is prevented.
Description
- The present invention relates to a safety device for quick-fit attachments. A “quick-fit attachment” is a device which makes it possible to fix a tool to the end of the arm of a hydraulic excavator or the like, which is referred to below as “the machine”.
- A “quick-fit attachment” is a mechanical device comprising two parts, of which one is fixed to the tool, for example a dipper, while the other is borne by the arm of the machine.
- The prior art on the subject is constituted, in particular, by document FR 2946061.
- This document describes an attachment, of which the first part, which is substantially stirrup-shaped and integral with the arm of the machine, comprises a cradle formed by a pair of hooks which is capable of being inserted under a shaft belonging to the second part borne by the tool.
- Said second part has a hook-shaped extension which is capable of passing through an opening in the first part and an opening in a sliding locking plate which is capable of being inserted under the said extension when the two parts are pressed against one another.
- Means are provided for keeping the locking plate in the “armed position”, that is to say in a position in which the hook-shaped extension is capable of passing freely through the median portion of the first part and the locking plate.
- When passing through the two openings, the hook-shaped extension frees the locking plate which, under the action of springs, is inserted under the said extension.
- Generally speaking, a quick-fit attachment is designed to be capable of being used with a range of machines having different sizes (and therefore different weights).
- Furthermore, it is known that a machine must not shift a load, including the tool, the weight of which exceeds about 15% of its weight. If so, since the load is excessive, the machine may topple over and cause an accident.
- In the current state of the art, it has to be recognised that a “small machine” may catch hold of, and handle, a dipper whose weight exceeds the machine's capacity.
- The present invention, which has the object of remedying this drawback, relates to a safety device which positively prevents the locking of a dipper whose weight, when loaded, exceeds that of the machine.
- Since it is known that the locking of a dipper can only take place on condition that the two parts of the attachment are pressed against one another, the safety device belonging to the invention utilises means, the effect of which is to resist this pressing action if the dipper to be caught hold of exceeds the machine's capabilities.
- According to the invention, each part of the attachment has a member which is capable of cooperating with a member belonging to the other part if the weight of the tool, when loaded, does not exceed the capacity of the machine, said cooperation being impossible if this is not the case, so as to resist the pressing of the first part onto the second and to prevent locking.
- The present invention will be better understood by means of the description that will follow, by referring to the drawings which are appended solely by way of an indicative example and in which:
-
FIG. 1 shows, in a vertical section and in perspective, the two parts of the attachment prior to the start of the hitching operation; -
FIG. 2 is a view similar toFIG. 1 , showing the two parts of the attachment at the start of the hitching operation; -
FIG. 3 is a view in perspective showing the dipper locked onto the machine, the locking plate not being represented; -
FIGS. 4 to 7 are diagrammatic views which explain the functioning of the safety device belonging to the invention; and -
FIGS. 8 and 9 are diagrammatic views similar toFIGS. 4 and 7 , showing a variant of embodiment. - According to the known art, the attachment comprises two
parts part 1 being fixed to the arm of the machine (not shown) while thepart 2 is fixed to the upper part of the dipper G. - The
part 1 has a pair ofhooks 3 which are capable of catching hold, as a result of judicious manoeuvring of the arm of the machine, of ashaft 4 which is borne by thepart 2, and of lifting the dipper. - By causing the
part 1 to pivot in the direction of the arrow F1, theusual extension 5 passes through the opening in the median part of thepart 1 and also through the opening in thelocking plate 6, freeing the latter which, when the two parts are pressed against one another, slides in the direction of the arrow F2 so as to be inserted under thesaid extension 5. - According to the invention, the
part 1 has a member which is constituted by afinger 7 which is capable of being inserted freely in a member constituted by aslot 8 in thepart 2, the dimensions of the said two members depending upon the size of the machine and of the dipper in such a way that the finger borne by a “small machine” cannot penetrate into the slot in a “large dipper”, although the reverse is naturally possible. - According to one mode of embodiment,
FIG. 4 shows afinger 7, the width of which is substantially equal to the width of theslot 8; the said finger is capable of penetrating freely into the said slot and locking is possible. Thefinger 7 is borne by a small machine and theslot 8 is borne by a small dipper. -
FIG. 5 shows afinger 7 a which is narrower than thefinger 7 and is borne by a large machine. Since thefinger 7 a easily penetrates into theslot 8, the locking of a small dipper onto a large machine is therefore possible. - As is apparent from
FIG. 6 , a large dipper is associated with aslot 8 a which is narrower than theslot 8 and is capable of cooperating with afinger 7 a. - On the other hand, as is apparent from
FIG. 7 , a large dipper with which anarrow slot 8 a is associated cannot be locked onto a small machine with which afinger 7 which is wider than thesaid slot 8 a is associated. - According to one variant of embodiment (
FIG. 8 ), thepart 1 is cut out in such a way as to have a projection 9 which is capable of penetrating into arecess 10 in thepart 2 if the dipper to be caught hold of does not exceed the capabilities of the machine. -
FIG. 9 shows a dipper G whose weight, when loaded, exceeds the capabilities of the machine and theedge 10 a of which is offset in relation to theedge 9 a of thepart 1, so that the projection 9 on the “small machine” cannot penetrate into therecess 10 on a “large dipper”. - It is apparent from the explanations given above that the safety device is disposed on the sides of the
parts shaft 4, but a similar result could be obtained if the said device were situated on at least one of the sides which extends substantially at right angles to the said shaft.
Claims (3)
1. Safety device for quick-fit attachments, comprising two parts (1) and (2), of which one (1) is borne by the arm of the machine while the other (2) is secured to the tool (for example a dipper), the said first part having a cradle (3) formed by a pair of hooks which is capable of catching hold of a shaft (4) belonging to the second part in order to raise the tool and allow the first part to pivot in order to press the two parts against one another to allow locking, characterised in that each part of the attachment has a member (7 or 9) which is capable of cooperating with a member (8 or 10) belonging to the other part if the weight of the tool, when loaded, does not exceed the capacity of the machine, said cooperation being impossible if this is not the case, so as to resist the pressing of the first part onto the second and to prevent locking.
2. Device according to claim 1 , characterised in that, according to one mode of embodiment, one of the members is constituted by a finger (7) which is capable of penetrating into a slot (8) in the other part, safety being ensured by judiciously dimensioning the slot and finger according to the size of the machine and of the tool in such a way that the finger belonging to a small machine cannot penetrate into the slot belonging to a tool whose weight, when loaded, exceeds the capabilities of the said machine.
3. Device according to claim 1 , characterised in that one of the members is constituted by a projecting part (9) which is capable of penetrating into a recess (10) in the other part, safety being ensured by judiciously positioning the edge (9 a) of the said projection in relation to the edge (10 a) of the said recess in such a way that the projection belonging to a small machine cannot penetrate into the recess belonging to a tool whose weight, when loaded, exceeds the capabilities of the said machine.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1102186 | 2011-07-12 | ||
FR1102186A FR2977903B1 (en) | 2011-07-12 | 2011-07-12 | SAFETY DEVICE FOR QUICK FASTENERS FOR ATTACHING A TOOL TO THE END OF THE ARM OF A HYDRAULIC EXCAVATOR |
PCT/FR2012/000207 WO2013007885A1 (en) | 2011-07-12 | 2012-05-24 | Safety device for quick-fit attachments used for fitting a tool to the end of the arm of a hydraulic excavator |
Publications (1)
Publication Number | Publication Date |
---|---|
US20140241786A1 true US20140241786A1 (en) | 2014-08-28 |
Family
ID=46458554
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/232,129 Abandoned US20140241786A1 (en) | 2011-07-12 | 2012-05-24 | Safety device for quick-fit attachments used for fitting a tool to the end of the arm of a hydraulic excavator |
Country Status (4)
Country | Link |
---|---|
US (1) | US20140241786A1 (en) |
EP (1) | EP2732102B1 (en) |
FR (1) | FR2977903B1 (en) |
WO (1) | WO2013007885A1 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010136664A1 (en) * | 2009-05-29 | 2010-12-02 | Klac Industrie | Quick-fastening safety device for attaching a tool to the end of the arm of a hydraulic power shovel or the like |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4133121A (en) * | 1976-08-18 | 1979-01-09 | Hemphill Charles W | Backhoe bucket adapter bushing and pin method and apparatus |
JP2859146B2 (en) * | 1994-02-28 | 1999-02-17 | 株式会社坂戸工作所 | Connector for construction work machine |
JP2000104276A (en) * | 1998-09-29 | 2000-04-11 | Kobe Kenki:Kk | Backet mount structure of excavator |
-
2011
- 2011-07-12 FR FR1102186A patent/FR2977903B1/en active Active
-
2012
- 2012-05-24 WO PCT/FR2012/000207 patent/WO2013007885A1/en active Application Filing
- 2012-05-24 US US14/232,129 patent/US20140241786A1/en not_active Abandoned
- 2012-05-24 EP EP12732687.4A patent/EP2732102B1/en active Active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010136664A1 (en) * | 2009-05-29 | 2010-12-02 | Klac Industrie | Quick-fastening safety device for attaching a tool to the end of the arm of a hydraulic power shovel or the like |
Also Published As
Publication number | Publication date |
---|---|
WO2013007885A1 (en) | 2013-01-17 |
EP2732102A1 (en) | 2014-05-21 |
EP2732102B1 (en) | 2016-11-23 |
FR2977903B1 (en) | 2013-08-02 |
FR2977903A1 (en) | 2013-01-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: KLAC INDUSTRIE, FRANCE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:MORIN, MARCEL;FAURE, FABRICE;REEL/FRAME:032516/0890 Effective date: 20140114 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |