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
  • E02F3/3613—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat with means for absorbing any play therebetween
• • 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

Definitions

• TITLE Quick coupler to attach a tool to the end of the arm of a loader or the like
• the present invention relates to improvements to quick couplers for attaching a tool, such as a bucket, to the end of the arm of a loader.
• a quick coupler has two separate parts, one of which is made integral with the arm and will be referred to as a hooking member, while the other, which can cooperate with the first, results from a modification of the 'tool or is constituted by a part made integral with the tool and will be referred to below as "adapter".
• one of the parts comprises a hook-shaped cradle capable of gripping a shaft carried by the other part, the two said parts being applied against one another by a judicious rotation of one of between them around the axis of the aforementioned tree. In most cases this rotation triggers the implementation of an automatic locking device.
• an automatic locking device Such a device is described, in particular, in European patent No. 438931 or in French patent application No. 99 12671 of October 12, 1999.
• the adapter is in the form of a stirrup against the fields of the wings from which the fastening member is supported at the end of its rotation.
• the contacts are made on two oblique surfaces arranged in vee.
• This device is not entirely satisfactory. Indeed, as it is used in a dirty environment, composed of earth, clay and pebbles forming a conglomerate likely to adhere to the metal parts, it was found that before locking the tool, s' ensure the cleanliness of the device and remove all impurities likely to be between surfaces to be contacted. In fact, if contact is not complete, locking is made impossible.
• the contacts between the two parts of the quick coupler take place at points which are distant from the common pivot axis of the two said parts.
• FIG 1 is an elevational view of a quick coupler according to the invention applied to the attachment of a bucket at the end of the arm of a loader;
• FIG. 2 is a view, similar to FIG. 1, showing a later phase of the attachment
• FIG. 3 is a view on a larger scale and limited to the fastener showing the latter in the tool locking position;
• FIG. 4 is a view in vertical section of the adapter
• FIG. 5 is the left view of FIG. 4;
• FIG 6 is a sectional view taken along the line Vl-Vl of Figure 4;
• FIG. 7 is an elevation view of the attachment member
• FIG. 8 is the left view of FIG. 7;
• FIG. 9 is a sectional view taken along line IX-IX of FIG. 7.
• FIGS. 10 and 11 are sectional views taken respectively along lines XX and XI-XI of FIG. 3, the sectional views being straightened.
• the quick coupler has two parts 1 and 2.
• Part 1 which constitutes the attachment member, is articulated by a shaft 3 at the end of the arm 4 of a mechanical shovel and it can pivot around the axis of this tree.
• Part 2, or adapter, is made integral with a bucket
• the means used to lock part 1 on part 2 are identical to those described in French patent application No. 99 12671.
• the part 2 has an extension 6, in the form of a hook, capable of passing through an orifice in the middle part 7 of the part 1 in order to unlock a locking plate 8 which, under the action of springs 9 (see fig. 7), fits under the shoulder 6a of the hook 6.
• Part 1 has, at least, an extension 10 for supporting a shaft 11 extending on either side of said extension.
• Part 2 has two hooks 12 providing sufficient space between them to allow passage of the extension 10. It should be noted that, when the tool 5 rests on the ground, the hooks 12 open downwards which prevents earth from stagnating in the hollows of said hooks.
• the contact between the parts 1 and 2 although taking place in the known manner along two surfaces arranged in a Vee, takes place over a very reduced portion 13 situated opposite the hooks 12.
• the piece 1 has, over a length at least equal to the length L, oblique spans 14, the angle A which, in FIG. 9, is that formed by each oblique span and the horizontal, being equal to that B which , in Figure 6, is that formed by the surface 13 and the horizontal.
• Each surface 13 is extended by a surface 15 which forms with the horizontal (fig. 6) an angle C greater than that B.
• this drawback is remedied by providing means which oppose any relative movement between the hooks 12 and the shaft 11 when the two parts are locked to one another.
• the part 1 has, in line with the shaft 11, a concave stop 17 formed by a cylindrical surface with circular director centered on the axis of the shaft 1 1.
• One of the hooks 12 at least has an outer portion 12a constituted by a cylindrical surface with circular director which, in the case of FIG. 2, is centered on the axis of the shaft 11 and whose radius is, apart from the functional clearance, equal to that of the directrix of the surface forming the stop 17.
• the portion 12a is connected, without continuity, to a portion 12b whose distance from the aforementioned axis decreases to its end 12c.
• the means described so far have the effect of opposing the appearance of games which can cause the parts 1 and 2 to move in a vertical plane. As the bearing surfaces 13 are reduced, it is important to provide means to compensate for the lack of lateral guidance.
• the external faces 18 of the extension 10 and those internal 19 of the hooks 12 are strongly stripped, being observed that the distance d measured at the birth of said hooks is equal, to the nearest functional clearance, at the distance D measured at the birth of the extension 10.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Mining & Mineral Resources (AREA)
• Civil Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Structural Engineering (AREA)
• Shovels (AREA)
• Clamps And Clips (AREA)
• Flanged Joints, Insulating Joints, And Other Joints (AREA)
• Manipulator (AREA)
• Forklifts And Lifting Vehicles (AREA)
• Automatic Tool Replacement In Machine Tools (AREA)
• Gripping On Spindles (AREA)
• Hooks, Suction Cups, And Attachment By Adhesive Means (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=8849815

Family Applications (1)

Country Status (6)

Families Citing this family (1)

Family Cites Families (8)

• 2000
  • 2000-05-03 FR FR0005606A patent/FR2808542B1/fr not_active Expired - Lifetime
• 2001
  • 2001-04-23 AU AU2001254902A patent/AU2001254902A1/en not_active Abandoned
  • 2001-04-23 AT AT01928032T patent/ATE290134T1/de not_active IP Right Cessation
  • 2001-04-23 DE DE60109149T patent/DE60109149D1/de not_active Expired - Lifetime
  • 2001-04-23 WO PCT/FR2001/001235 patent/WO2001083893A1/fr active IP Right Grant
  • 2001-04-23 EP EP01928032A patent/EP1278915B1/de not_active Expired - Lifetime

Non-Patent Citations (1)

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