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
  • E02F3/3627—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
  • E02F3/364—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat using wedges
• • 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
  • E02F3/3663—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat hydraulically-operated

Definitions

• the present invention relates to a new type of quick coupling device for connecting and disconnecting an implement to an implement carrying machine.
• Such machines are various types of construction machinery such as excavators, earth movers, loading machines, etc. Buckets, bulldozer blades, lifting forks, crane jibs, concrete pumping equipment, etc. can be mentioned as examples of implements which can be coupled to such machines. It should, however, be underlined that the invention is not limited to these especially mentioned implements and machines, but it can be applied in ail such cases when there is a need of coupling a working implement to a machine. In known devices of the indicated type the coupling usually takes place by hanging a yoke shaped top portion of the implement or implement holder over the top edge of a suspension plate on the machine, the locking between the two parts taking place by means of laterally acting pistons.
• the subject matter of the invention is thus a device for the quick coupling of an implement to and from an implement carrying machine.
• the device is of the type which comprises an implement holder carried by the implement and a suspension plate carried by the machine, which cooperate for removable attachment of the implement to the machine.
• the suspension plate is provided with at least one suspension element having upwardly tapered cross- sectional shape
• the implement holder is provided with at least one suspension recess having corresponding upwardly tapered shape as the suspension element or elements.
• the suspension elements and recesses are so arranged that the suspension elements can be guided into the corresponding recesses when the suspension plate is moved upwards.
• the device is further provided with means for lockingly pressing the suspension elements into the corresponding suspension recesses while at the same time securing the suspension plate against the implement holder.
• suspension elements on the suspension plate can have the shape of one or more elongate fillets (with corresponding suspension recesses in the implement holder) they preferably have the shape of a truncated cone, in which case the suspension recesses, of course, are shaped corresponding- ly.
• at least two such suspension elements are utilized, preferably being mirror symmetrically located in relation to the vertical axis of the suspension plate.
• the suspension elements are at their broader base portions preferably so designed that they are again tapered below the base portion, so that the suspension elements upon wear freely can further penetrate the respective suspension recesses.
• These recesses are in a corresponding manner provided with a free play at their upper, narrower end portion, so that further penetration of the suspension elements into the recesses is not hindered upon wear.
• a free play at the lower portion of the suspension elements and at the top portion of the suspension recesses respectively is suitably at least about 10 mm, for example 10 to 30 mm.
• the locking devices for pressing the suspension elements into the corresponding suspension recesses and securingly pressing the suspension plate against the implement holder preferably comprises one or more piston/cylinder units, which are carried by the suspension plate and cooperate with corresponding stop means provided on the implement holder.
• These stop means are preferably designed as half wedge-shaped locking recesses, into which corresponding "half wedges" on the piston/cylinder unit can be inserted. Upon insertion of the half wedges into the locking recesses by means of the piston/cylinder units, the same will press the suspension elements into the corresponding suspension recesses while at the same time pressing the suspension plate against the implement holder.
• Fig. la is a schematic side elevation view showing the principle of the implement holder according to the invention
• Fig. lb is a schematic half perspective view showing the principle of the suspension plate according to the invention
• Fig. 2 is a rear view of a first embodiment of the suspension plate according to the invention
• Fig. 3 is a rear view of a second embodiment of the suspension plate according to the invention
• Fig. 4 is a schematic partial view illustrating the interconnection of a suspension plate and an implement holder according to the invention
• Fig. 5 is a partial view taken along the arrows A-A of Fig. 2 and schematically showing a preferred embodiment of the suspension elements of the device according to the invention
• Figs. 6 and 7 are part views from above (taken according to the arrows B-B in Fig. 2) and in side elevation respectively, showing a preferred embodiment of the locking means in the device according to the invention
• Fig. 8 is a schematic side elevation view showing an implement holder according to the invention attached to an excavator..
• the implement holder shown in Fig. la comprises a vertical holder plate la having a top piece lb projecting therefrom.
• a conic suspension recess 2 is provided in the top piece lb.
• the implement holder 1 is at its lower portion provided with stop means 3 having a "half" wedge-shaped locking recess, which is illustrated by the dashed line .
• the implement holder shown in Fig. la is intended to cooperate with the suspension plate 5 shown in Fig. lb.
• Fig. lb schematically shows how the plate 5 is intended to be connected to a load arm 6 and a rocker arm 7 on the vehicle intended to use the implement attached to the implement holder I.
• At the top of the suspension plate 5 there are two (or more) firmly secured suspension elements 8, each of which in the shown embodiment having the shape of a truncated cone. This truncated cone has a corresponding inclination and dimensions as the suspension recesses 2 in the top piece lb of the implement holder 1.
• the suspension plate 5 further carries a piston/cylinder unit 9, which preferably is hydraulic and connected to the hydraulic system of the carrier vehicle.
• the piston/cylinder units are preferably controlled by means of suitable control means (not shown) located in connection to the driver's seat in the carrier vehicle.
• the cylinder part 10 of the piston/cylinder unit is in suitable manner attached to the suspension plate 5, whereas its piston part 11 is connected to a locking bolt 13, preferably by means of a suitable connecting piece 12.
• the free end 13a of the locking bolt 13 is designed as a locking wedge fitting into the locking recess of the implement holder 1.
• the locking bolt 13 is preferably held in the proper position on the suspension plate 5 by means of a guide sleeve 14.
• the suspension plate 5 is provided with an opening 15, through which the stop piece 3 (having the locking recess 4) of the implement holder 1 is intended to pass.
• the quick coupling device essentially operates in the following manner.
• an implement for example the bucket 16 shown in Fig. 8
• the load arms 6 and rocker arms 7 of the implement carrying machine are operated such that the suspension cones 8 on the suspension plate 5 from below are moved towards the corresponding suspension recesses 2 in the top piece lb of the implement holder.
• an automatic guiding to the correct position takes place because of the conic shape of the two elements.
• wide margins of error are permitted in the adjustment between the suspension plate 5 and the implement holder 1. Therefore, the operator can make a rough positioning of the suspension plate in relation to the implement holder from the driver's seat of the machine, whereas the fine adjustment takes place automatically because of the conic shape of the suspension details.
• the stop piece 3 of the implement holder 1 will be inserted through the opening 15 of the suspension plate , so that the locking recesses 4 will be located on the opposite side of the suspension plate 5 (compare Fig. 7).
• the final locking of the implement holder 1 (and consequently of the implement 16) on the suspension plate 5 (and consequently on the carrying machine) takes place by actuation of the piston/cylinder unit 9. In the starting position said unit is in the position shown in Fig. lb, the locking bolt 13a essentially being in a retracted position above the opening 15 so that the stop piece 3 freely can be passed through said opening.
• suspension cones 8 and the suspension recesses 2 should be designed such that they can be moved freely further into the recesses and freely receive further
• FIG. 4 shows a suspension cone 8 inserted into a suspension recess 2 in unworn condition.
• the desired "wear margin" of the recess 2 is provided simply by an extension 2a of the conic recess 2.
• suspension cones 8 can in a corresponding manner as for conic recesses 2 at their bottoms be provided with an extension of the conic shape, but according to a preferred embodiment the suspension elements 8
• suspension elements 8 are designed as "double cones", i.e. at their bottom portions merging into a second, downwardly tapered conic portion 8a.
• the cones themselves are exchangeable, which makes possible a very quick and simple change of suspension cones 8 when needed.
• the suspension elements 8 may with their conic portions 8a be attached in holders 17 by means of suitable bolt joints
• the holders 17 are rigidly secured to the suspension plate 5, preferably welded on the same, and they are provided with conic attachment recesses 19, corresponding to the shape of the portion 8a. Upon wear of the suspension elements 8 the same can thus in a simple manner be exchanged by loosening the bolt joint 18 and attaching a new suspension element 8.
• Figs. 6 and 7 illustrate a preferred embodiment of the locking recesses 4 and the corresponding locking wedges 13a. In this embodiment these elements
• the locking elements 35 have the corresponding shape as the suspension cones 8 and the suspension recesses 2 respectively, with the exception that the locking details only have "half" conic shape, i.e. the shape of truncated cones which are severed essentially along their diameter plane.
• This embodiment of the locking elements offers the corresponding advantages as the preferred embodiment with conic suspension elements 8 and conic locking recesses 2 as regards fitting margin for the locking wedges 13 into the recesses h, insensitivity to wear, rigid locking in all directions, etc. It should, however, be underlined that the locking elements and 13a are not limited to this preferred embodiment, but the invention is also intended to comprise all other wedge shapes, which provide for pressing of the locking elements 8 into the recesses 2 and at the same time clamp the suspension plate 5 against the implement holder 1.
• Fig. 2 shows a preferred embodiment of a suspension plate in a quick coupling in accordance with the invention, primarily intended for heavier loading machines and the like.
• the device comprises two piston/- cy Under units 9 (preferably hydraulic), which are located symmetrically at the sides of the suspension plate 5.
• the hydraulic cylinders 10 are firmly secured to the suspension plate 5 in any suitable manner, e.g. by means of attachment brackets 20.
• the hydralic piston 11 is provided with a yoke portion 12a, which via a shaft 12c is journalled on an intermediate piece 12b connected to the lock bolt 13 (compare Fig. 7).
• the suspension plate 5 is provided with three suspension cones 8, which are arranged mirror symmetrically in relation to the vertical centre line 9 of the device.
• the suspension elements 8 are designed as described with reference to Fig. 5.
• the suspension plate 5 is further provided with two mountings 6a for attachment of the suspension plate to the load arm of the relevant carrier machine and with two upper mountings 7a for attachment to the rocker arm of the machine.
• the implement holder 1 is correspondingly provided with three similarly located suspension recesses and two stop pieces arranged to pass through the respective openings 15 of the suspension plate 5.
• Fig. 3 shows an alternative embodiment of a suspension plate for a quick coupling according to the invention, which is especially intended for coupling of relatively light weight implements, for example a bucket (compare Fig. 8 ) to an excavator. Since the forces in this case are not as great, it is often sufficient with one single centrally arranged piston/cylinder unit 9 and two suspension cones 8, which are symmetrically arranged and located in the vicinity of the sides of the suspension plate 5.
• the suspension cones 8 and the piston/cylinder units 9 are designed and operate fully in analogy with the earlier described embodiment.
• Fig. 3 illustrates an alternative attachment of the piston/cylinder unit 9 to the plate 5.
• the suspension plate 5 is provided with an attachment bracket 20a, which is secured, preferably welded, to the suspension plate, and which carries the cylinder part 10 of the piston/cylinder unit 9 by means of a shaft 21 passing through the attachment yoke.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Mining & Mineral Resources (AREA)
• Civil Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Structural Engineering (AREA)
• Vehicle Body Suspensions (AREA)
• Gripping On Spindles (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=20340872

Family Applications (1)

Country Status (6)

Families Citing this family (2)

Family Cites Families (4)

• 1980
  • 1980-04-29 SE SE8003255A patent/SE8003255L/xx not_active Application Discontinuation
• 1981
  • 1981-04-29 EP EP81901118A patent/EP0052112A1/de not_active Withdrawn
  • 1981-04-29 BR BR8108580A patent/BR8108580A/pt unknown
  • 1981-04-29 JP JP56501455A patent/JPS57500656A/ja active Pending
  • 1981-04-29 WO PCT/SE1981/000131 patent/WO1981003192A1/en not_active Ceased
  • 1981-12-28 NO NO814432A patent/NO814432L/no unknown

Non-Patent Citations (1)

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