EP3312350A1 - Connection apparatus for interconnecting an arm and a tool of a work machine - Google Patents
Connection apparatus for interconnecting an arm and a tool of a work machine Download PDFInfo
- Publication number
- EP3312350A1 EP3312350A1 EP17202832.6A EP17202832A EP3312350A1 EP 3312350 A1 EP3312350 A1 EP 3312350A1 EP 17202832 A EP17202832 A EP 17202832A EP 3312350 A1 EP3312350 A1 EP 3312350A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- quick coupling
- auxiliary locking
- hydraulic
- tool
- bolt
- 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
Links
- 230000008878 coupling Effects 0.000 claims abstract description 50
- 238000010168 coupling process Methods 0.000 claims abstract description 50
- 238000005859 coupling reaction Methods 0.000 claims abstract description 50
- 230000000295 complement effect Effects 0.000 claims abstract description 4
- 239000012530 fluid Substances 0.000 claims description 4
- 238000009826 distribution Methods 0.000 claims description 3
- 230000013011 mating Effects 0.000 claims description 3
- ORQBXQOJMQIAOY-UHFFFAOYSA-N nobelium Chemical compound [No] ORQBXQOJMQIAOY-UHFFFAOYSA-N 0.000 description 4
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 230000007257 malfunction Effects 0.000 description 3
- 239000010720 hydraulic oil Substances 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
- 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
-
- 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
- E02F3/3622—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 locking element acting on a pin
-
- 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
- E02F3/365—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat with redundant latching means, e.g. for safety purposes
Definitions
- connection apparatus of the type forming the subject matter of the present invention is adapted to connect mechanical elements of various kinds, and is particularly suitable to connect, mechanically and in a removable manner, a bucket, or another tool for demolition, for earth movement, for the care of green spaces and the like to an arm or to a support of a heavy machine, such as a tractor or a bulldozer.
- This prior art connection apparatus is provided with a first member stably connected to the tool and with a second member stably connected to the mechanical arm.
- one side of a member is provided with a transverse pin for coupling a corresponding side of the other member.
- the two members can rotate mutually like a hinge.
- one of these members is equipped with one or more bolts, which slide between a first released configuration and a second configuration locking the two members together.
- the operating axis of the insertion and/or extraction forces is in any case offset relative to the operating axis of the bolts.
- the main object of the present invention is the creation of a quick coupling with none of the problems described above and that is also easy and cost-effective to manufacture.
- a further object of the present invention is to provide a connection apparatus, comprising a quick coupling of the aforesaid type, which has none of the problems listed above.
- connection apparatus forming the subject matter of the present invention both the operating axis of the engagement forces and that of disengagement coincide with the movement axis of the bolts, as the hydraulic actuating cylinder has been incorporated inside at least one locking bolt.
- connection device in order to increase the degree of safety of the connection device, further measures have been introduced, aimed at minimizing, or totally eliminating, the possibility of malfunction or breakage of any component of the device causing detachment of the tool from the operating arm.
- auxiliary locking device provided with an operating axis parallel to that of the locking bolts, but which moves in the opposite direction.
- the hydraulic cylinder of the aforesaid auxiliary locking device is operated to insert an auxiliary locking device capable of preventing disengagement of a transverse pin of the adapter from a slot of the quick coupling.
- the movement to make safe the auxiliary locking device is also favored by the presence of a spring inside the hydraulic cylinder thereof.
- This spring ensures extension of the auxiliary locking element in all conditions and therefore prevents disengagement of the slot from one of the transverse pins of the adapter, when, for any reason, the hydraulic supply to the cylinder is absent.
- the numeral 100 indicates as a whole a connection apparatus between a tool (U) and an operating arm (not shown).
- this tool (U) is a bucket
- this tool (U) can be any other tool for demolition, for earth movement, for the care of green spaces and the like.
- connection apparatus 1000 in turn comprises first coupling means 100 to the tool (U), and second coupling means 200 to the operating arm (not illustrated).
- the first coupling means 100 to the tool (U) comprise two mutually parallel ribs 101.
- the assembly of the two ribs 101, of the two transverse pins 102 and of a base plate 103 form the aforesaid first coupling means 100, also referred to as "adapter".
- this adapter 100 is fastened to the tool (U) by welding.
- the second coupling means 200 comprise, in turn, a quick coupling 250, to which there are fastened two ribs 260 having mechanical means that allow coupling thereof with the arm of the heavy machine.
- the quick coupling 250 is shown in particular in Figs. 4 and 5 , and comprises a main body 252, substantially box-shaped, inside which there is produced an inner compartment 253 provided with specific seats for housing the devices required for its operation.
- the main body 252 is substantially shaped as a hollow rectangular parallelepiped. On each of the lower sides of the parallelepiped there is provided a fork-shaped seat 254 adapted to couple, in use with one of the two transverse pins 102 of the adapter 100 ( Figs. 1 , 2 and 3 ).
- the inner compartment 253 in use, is closed at the top by an upper cover 255, which is sized to engage in a rectangular slot 255' produced in an upper face 252' of the main body 252; moreover, the inner compartment 253 is closed at the bottom by a lower cover 256, also sized to engage in a rectangular slot 256'.
- two lateral abutments 257 selected as a function of the width of the adapter 100 to which the quick coupling 250 is to be coupled.
- Two through holes 258A pass through a first lower side 258, while a single through hole 259A passes through a second lower side (opposite the first lower side 258).
- auxiliary locking element 280 which is part of an auxiliary locking device 290, better described below, protrudes outward from the through hole 259. It is considered useful to specify that the auxiliary locking device 290 is an integral part of the quick coupling 250.
- the auxiliary locking element 280 has two flattened horizontal sides for the purpose of facilitating coupling thereof with one of the two pins 102 of the adapter 100.
- the inner compartment 253 there are housed (at least partly) the following devices:
- the auxiliary locking element 280 presses in a position above the other pin 102, clamping this pin 102 with the underlying part of each seat 254.
- the main body 252 is delimited at the top on the opposite side to the through holes 258A by a protruding section 251, which extends to cover the auxiliary locking element 280 at the top in a manner substantially mating with a respective lower face 251', visible in Fig. 3 .
- This section 251 is adapted, in use, to oppose any transverse shifting (upward in Fig. 3 ) of the auxiliary locking device 280, and hence this section 251 is a safety member that contributes to strengthen the hold of the corresponding pin 102 inside the fork-shaped seats 254 produced by the auxiliary locking element 280, positioning it stably relative to the corresponding pin 102.
- the auxiliary locking device 290 is arranged so that the auxiliary locking element 280 is arranged along a further longitudinal axis (Y) parallel to the operating axes (X) of the bolts 270. Moreover, it is important to note that the axis Y is parallel to the axes X and at a level such that the lower edge of the locking element 280 is tangent to the pin 102.
- a spring 284 which is adapted to return the cylinder 281 to the locked position if the hydraulic supply is absent, producing another safety device associated with the quick coupling 250.
- the hydraulic supply of the bolts 270 takes place through passages produced in the respective rods 270.
- a pilot-operated check valve 283 that prevents uncontrolled movements of the system if the hydraulic supply pipes are disconnected or damaged.
- the main advantage of the quick coupling forming the main subject matter of the present invention consists in the fact of having eliminated the offsets between the axes of the bolts and related actuator systems, in this way overcoming the problem of binding of the bolts after insertion. Moreover, use of the auxiliary locking device allows the quick coupling to be made safe.
- An embodiment of the invention can further relate to a quick coupling 250 of a tool U to an arm of a heavy machine, the quick coupling 250 comprising a main body 252, substantially box-shaped, provided with an inner compartment 253 containing actuator means 275 of at least one bolt element 270 adapted to engage with complementary means 102 provided on an adapter 100 integral with said tool U; said at least one bolt element 270 being shaped so as to receive therein at least a double-acting hydraulic actuation system 275 adapted to move said at least one bolt element 270 forward from a retracted disengaged position to an extended position engaged with a first element 102 of the adapter 100, so that the thrust exerted by said hydraulic actuation system 275 has an operating axis substantially coincident with a longitudinal axis X of said at least one bolt element 270; wherein the quick coupling 250 comprises an auxiliary locking device 290 comprising in turn at least one auxiliary locking element 280, and in that said at least one auxiliary locking element 280 can be moved forward from
- said at least one bolt element 270 comprises a rod 271 and in that the hydraulic supply of the actuator takes place through appropriate passages produced inside the rod 271 that operates said at least one bolt element 270, this hydraulic supply being able to be conveyed inside said rod 271 through a hydraulic distribution board 272 that has been suitably machined internally for passage of the hydraulic fluid and to which there are fastened suitable hydraulic connectors.
- said auxiliary locking device 290 comprises a hydraulic chamber 281B containing therein elastic means 284.
- said auxiliary locking device 290 is hydraulically connected with a check valve 283.
- said main body 252 has safety means 251 adapted to oppose transverse shifting of said auxiliary locking element 280 relative to the corresponding said second element 102.
- said safety means 251 comprise a protruding section 251, which covers said auxiliary locking element 280 in a manner substantially mating with a respective lower face 251' to position it stably relative to said second element 102.
- An embodiment of the invention can further relate to a connection apparatus 1000 which comprises at least one quick coupling 250 according to any of the previous embodiments.
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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)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
- Automatic Tool Replacement In Machine Tools (AREA)
- Forging (AREA)
Abstract
Description
- The present invention concerns the field of mechanical connections and relates to a quick coupling, and to the related connection apparatus, of a tool to an operating arm. In general, connection apparatus of the type forming the subject matter of the present invention is adapted to connect mechanical elements of various kinds, and is particularly suitable to connect, mechanically and in a removable manner, a bucket, or another tool for demolition, for earth movement, for the care of green spaces and the like to an arm or to a support of a heavy machine, such as a tractor or a bulldozer.
- There is known in the art apparatus destined to reversibly connect tools, such as buckets and impact hammers for demolition, to operating supports, such as the articulated arms of self-propelled machines for earth movement, demolition or the like.
- This prior art connection apparatus is provided with a first member stably connected to the tool and with a second member stably connected to the mechanical arm.
- In general, one side of a member is provided with a transverse pin for coupling a corresponding side of the other member.
- It is thus possible to couple and release the hooks of one member to/from the pin of the other. In the coupled position, the two members can rotate mutually like a hinge. To block this rotation, preventing release and to produce the connection between the two members, one of these members is equipped with one or more bolts, which slide between a first released configuration and a second configuration locking the two members together.
- Operation of the sliding bolts can be implemented through elastic elements (springs) or mechanical (actuator screws) or hydraulic actuators. However, each of the devices known in the art currently in use has drawbacks.
- In fact, the use of elastic elements to block the moving member results in the need to use a further mechanism adapted to perform disengagement of the sliding bolts from the locking surfaces when wishing to disconnect the two elements. This mechanism can in turn be manually or hydraulically actuated.
- However, in each of the current systems, the operating axis of the insertion and/or extraction forces is in any case offset relative to the operating axis of the bolts.
- The presence of this offset between the axes, in apparatus currently available on the market, can cause binding during the steps of engagement or disengagement of the bolts. This binding can be very damaging to the operation of the connection device and could cause the tool to b with loss of stability of the connection if were to occur during the step of engagement of the bolts; or, if were to occur during disengagement of the bolts, it could prevent disconnection of the tool from the arm.
- Therefore, the main object of the present invention is the creation of a quick coupling with none of the problems described above and that is also easy and cost-effective to manufacture. A further object of the present invention is to provide a connection apparatus, comprising a quick coupling of the aforesaid type, which has none of the problems listed above.
- Therefore, according to the present invention, there are provided a quick coupling and a connection apparatus as claimed in the independent claims or in any one of the dependent claims depending directly or indirectly on the independent claims.
- In greater detail, it can be said that in the connection apparatus forming the subject matter of the present invention both the operating axis of the engagement forces and that of disengagement coincide with the movement axis of the bolts, as the hydraulic actuating cylinder has been incorporated inside at least one locking bolt.
- Moreover, in order to increase the degree of safety of the connection device, further measures have been introduced, aimed at minimizing, or totally eliminating, the possibility of malfunction or breakage of any component of the device causing detachment of the tool from the operating arm. For this purpose, there has been inserted inside the quick coupling an auxiliary locking device provided with an operating axis parallel to that of the locking bolts, but which moves in the opposite direction.
- In the case in hand, when the bolts for coupling and locking of the tool are operated simultaneously, the hydraulic cylinder of the aforesaid auxiliary locking device is operated to insert an auxiliary locking device capable of preventing disengagement of a transverse pin of the adapter from a slot of the quick coupling.
- If, for any reason, the coupling bolts fail to produce safe locking of the tool, this latter would still be connected to the arm via the aforesaid auxiliary locking device and could not disengage and consequently create a hazard for the operators.
- As will be more apparent below, the movement to make safe the auxiliary locking device is also favored by the presence of a spring inside the hydraulic cylinder thereof. This spring ensures extension of the auxiliary locking element in all conditions and therefore prevents disengagement of the slot from one of the transverse pins of the adapter, when, for any reason, the hydraulic supply to the cylinder is absent.
- It should be noted that in the event of any malfunction that causes the loss of hydraulic pressure, even with the tool disconnected, the spring would in turn cause insertion of the auxiliary locking device, which, in this configuration, would prevent the transverse pin of the adapter from entering the slot of the quick coupling, making the malfunction evident and preventing use of the connection apparatus without the necessary safety.
- Finally, between the hydraulic system of the quick coupling and the external hydraulic oil supply pipes there is interposed a check valve, pilot-operated to ensure that there are no uncontrolled movements inside the quick coupling in the event of breakage of or damage to the hydraulic oil supply line.
- For better understanding of the present invention, there are now described some preferred embodiments, provided purely by way of non-limiting example and with reference to the accompanying drawings, wherein:
-
Fig. 1 illustrates a first three-dimensional configuration of a connection apparatus produced according to the dictates of the present invention; -
Fig. 2 shows a second three-dimensional configuration of the connection apparatus ofFig. 1 ; -
Fig. 3 illustrates a third and last three-dimensional configuration of the connection apparatus shown inFigs. 1 and 1 ; in this configuration the connection apparatus is fully inserted; -
Fig. 4 shows a three-dimensional view of a quick coupling, further subject matter of the present invention, which is a part of the connection apparatus illustrated inFigs. 1 ,2 and3 ; -
Fig. 5 illustrates an exploded view of the quick coupling ofFig. 4 ; -
Fig. 6 shows a partly sectional three-dimensional view of a bolt used in the quick coupling ofFigs. 4 and5 ; -
Fig. 7 illustrates a partly sectional three-dimensional view of an auxiliary locking device, which belongs to the quick coupling shown inFigs. 4 , and5 ; and -
Fig. 8 shows the hydraulic circuit that drives the various devices belonging to the quick coupling ofFigs. 4 and5 . - With reference to
Figs. 1 to 3 , thenumeral 100 indicates as a whole a connection apparatus between a tool (U) and an operating arm (not shown). - Incidentally, it must be stated that although in the present figures the tool (U) is a bucket, this tool (U) can be any other tool for demolition, for earth movement, for the care of green spaces and the like.
- The
connection apparatus 1000 in turn comprises first coupling means 100 to the tool (U), and second coupling means 200 to the operating arm (not illustrated). - The first coupling means 100 to the tool (U) comprise two mutually
parallel ribs 101. - At the ends of the two
ribs 101 there are welded twotransverse pins 102, each of which is provided with arespective groove 102A for engaging a respective bolt (see below). - The assembly of the two
ribs 101, of the twotransverse pins 102 and of abase plate 103 form the aforesaid first coupling means 100, also referred to as "adapter". - For example, this
adapter 100 is fastened to the tool (U) by welding. - As shown again in
Figs. 1 to 3 , the second coupling means 200 comprise, in turn, aquick coupling 250, to which there are fastened tworibs 260 having mechanical means that allow coupling thereof with the arm of the heavy machine. - We shall now describe in greater detail the
quick coupling 250 that, as already stated, represents one of the subject matters of the present invention. - The
quick coupling 250 is shown in particular inFigs. 4 and5 , and comprises amain body 252, substantially box-shaped, inside which there is produced aninner compartment 253 provided with specific seats for housing the devices required for its operation. - The
main body 252 is substantially shaped as a hollow rectangular parallelepiped. On each of the lower sides of the parallelepiped there is provided a fork-shaped seat 254 adapted to couple, in use with one of the twotransverse pins 102 of the adapter 100 (Figs. 1 ,2 and3 ). - As shown in
Fig. 5 , theinner compartment 253, in use, is closed at the top by anupper cover 255, which is sized to engage in a rectangular slot 255' produced in an upper face 252' of themain body 252; moreover, theinner compartment 253 is closed at the bottom by alower cover 256, also sized to engage in a rectangular slot 256'. - On the two longer sides of the
main body 252 there are fastened, with known methods, twolateral abutments 257 selected as a function of the width of theadapter 100 to which thequick coupling 250 is to be coupled. Two throughholes 258A pass through a firstlower side 258, while a single throughhole 259A passes through a second lower side (opposite the first lower side 258). - As will be more apparent below, a
related bolt 270 passes through each throughhole 258A, while anauxiliary locking element 280, which is part of anauxiliary locking device 290, better described below, protrudes outward from thethrough hole 259. It is considered useful to specify that theauxiliary locking device 290 is an integral part of thequick coupling 250. - Advantageously, but not necessarily, the
auxiliary locking element 280 has two flattened horizontal sides for the purpose of facilitating coupling thereof with one of the twopins 102 of theadapter 100. - As shown in greater detail in
Figs. 4 , and5 , in theinner compartment 253 there are housed (at least partly) the following devices: - two
rods 271 for operation of thebolts 270; therods 271 are hydraulically connected to ahydraulic distribution board 272 and form with this latter a double-actinghydraulic actuator system 275 adapted to move thebolts 270 forward from a retracted disengaged position to an extended position engaged with one of the twopins 102 of theadapter 100; in other words, eachbolt 270 is shaped so as to receive therein at least a portion of a double-actinghydraulic drive system 275 so that the thrust exerted by thehydraulic system 275 has an operating axis substantially coincident with a longitudinal axis (X) of thebolt 270; the two bolts are supported by aspecific support 276, also housed in theinner compartment 253 that allows each bolt 2370 to slide along the corresponding axis (X); and - an
auxiliary locking device 290, already mentioned above, which, as well as theauxiliary locking element 280 also comprises a hydraulic actuator cylinder 381, also positioned in theinner compartment 253; as illustrated in greater detail inFig. 7 , thehydraulic actuator cylinder 281 comprises, in turn, twochambers respective connector Fig. 4 ); moreover, the twoconnectors Fig. 4 ). This pilot-operatedcheck valve 283 has the function of preventing movement of theauxiliary locking device 290 and of thecoupling pins 270 in the event of broken pipes, so that theauxiliary locking device 290 is not affected by any breakage of feed pipes external to the system. Thechamber 281B contains therein aspring 284, which guarantees extension of theauxiliary locking element 280 in any condition and thus prevents theseat 254 from disengaging from one of thetransverse pins 102 of theadapter 100, when, for any reason, the hydraulic supply to thehydraulic actuator cylinder 281 is interrupted. - Moreover, it should be noted that, while the
bolts 270 are inserted in use under one of thepins 102, theauxiliary locking element 280 presses in a position above theother pin 102, clamping thispin 102 with the underlying part of eachseat 254. With particular reference toFigs. 2 and5 , it can be noted that themain body 252 is delimited at the top on the opposite side to the throughholes 258A by aprotruding section 251, which extends to cover theauxiliary locking element 280 at the top in a manner substantially mating with a respective lower face 251', visible inFig. 3 . - This
section 251 is adapted, in use, to oppose any transverse shifting (upward inFig. 3 ) of theauxiliary locking device 280, and hence thissection 251 is a safety member that contributes to strengthen the hold of thecorresponding pin 102 inside the fork-shaped seats 254 produced by theauxiliary locking element 280, positioning it stably relative to thecorresponding pin 102. - The
auxiliary locking device 290 is arranged so that theauxiliary locking element 280 is arranged along a further longitudinal axis (Y) parallel to the operating axes (X) of thebolts 270. Moreover, it is important to note that the axis Y is parallel to the axes X and at a level such that the lower edge of thelocking element 280 is tangent to thepin 102. - With reference to
Fig. 8 , by supplying the coupling line LA with hydraulic fluid this causes simultaneous operation of thecylinder 281, which in turn causes operation of thelocking element 280 and of the twobolts 270, which actuate locking of thequick coupling 250. Vice versa, again with reference toFig. 8 , by feeding a hydraulic fluid into the release line LS this causes return of thelocking element 280, and consequently release of thecorresponding pin 102, as well as return of the twobolts 270 to the unlocked position, also causing release of thecorresponding pin 102. It should be noted that there is installed inside the cylinder 281 aspring 284, which is adapted to return thecylinder 281 to the locked position if the hydraulic supply is absent, producing another safety device associated with thequick coupling 250. Moreover, as can be noted (Figs. 6 and8 ) the hydraulic supply of thebolts 270 takes place through passages produced in therespective rods 270. As already indicated, upstream of the whole hydraulic system there is installed a pilot-operatedcheck valve 283 that prevents uncontrolled movements of the system if the hydraulic supply pipes are disconnected or damaged. - The main advantage of the quick coupling forming the main subject matter of the present invention consists in the fact of having eliminated the offsets between the axes of the bolts and related actuator systems, in this way overcoming the problem of binding of the bolts after insertion. Moreover, use of the auxiliary locking device allows the quick coupling to be made safe.
- An embodiment of the invention can further relate to a
quick coupling 250 of a tool U to an arm of a heavy machine, thequick coupling 250 comprising amain body 252, substantially box-shaped, provided with aninner compartment 253 containing actuator means 275 of at least onebolt element 270 adapted to engage withcomplementary means 102 provided on anadapter 100 integral with said tool U; said at least onebolt element 270 being shaped so as to receive therein at least a double-actinghydraulic actuation system 275 adapted to move said at least onebolt element 270 forward from a retracted disengaged position to an extended position engaged with afirst element 102 of theadapter 100, so that the thrust exerted by saidhydraulic actuation system 275 has an operating axis substantially coincident with a longitudinal axis X of said at least onebolt element 270; wherein thequick coupling 250 comprises anauxiliary locking device 290 comprising in turn at least oneauxiliary locking element 280, and in that said at least oneauxiliary locking element 280 can be moved forward from a retracted position to a forward position of engagement with a secondcorresponding element 102 of said adapter, and in that the direction of forward movement of said at least onelocking element 280 is opposite that of said at least onebolt element 270. - In a further embodiment, said at least one
bolt element 270 comprises arod 271 and in that the hydraulic supply of the actuator takes place through appropriate passages produced inside therod 271 that operates said at least onebolt element 270, this hydraulic supply being able to be conveyed inside saidrod 271 through ahydraulic distribution board 272 that has been suitably machined internally for passage of the hydraulic fluid and to which there are fastened suitable hydraulic connectors. - In a futher embodiment, said
auxiliary locking device 290 comprises ahydraulic chamber 281B containing thereinelastic means 284. - In a futher embodiment, said
auxiliary locking device 290 is hydraulically connected with acheck valve 283. - In a futher embodiment, said
main body 252 has safety means 251 adapted to oppose transverse shifting of saidauxiliary locking element 280 relative to the corresponding saidsecond element 102. - In a futher embodiment, said safety means 251 comprise a protruding
section 251, which covers saidauxiliary locking element 280 in a manner substantially mating with a respective lower face 251' to position it stably relative to saidsecond element 102. - An embodiment of the invention can further relate to a
connection apparatus 1000 which comprises at least onequick coupling 250 according to any of the previous embodiments.
Claims (7)
- Quick coupling (250) of a tool (U) to an arm of a heavy machine, the quick coupling (250) comprising a main body (252), substantially box-shaped, provided with an inner compartment (253), at least one bolt element (270) adapted to engage with complementary means (102) provided on an adapter (100) integral with said tool (U); a double-acting hydraulic actuation system (275) adapted to move said at least one bolt element (270) forward from a retracted disengaged position to an extended position engaged with said complementary means (102), characterized by an auxiliary locking device (290) comprising at least one auxiliary locking element (280), and in that said at least one auxiliary locking element (280) can be moved forward from a retracted position to a forward position of engagement with a corresponding element (102) of said adapter, and in that the direction of forward movement of said at least one locking element (280) is opposite that of said at least one bolt element (270).
- Quick coupling (250) as claimed in claim 1, characterized in that said at least one bolt element (270) comprises a rod (271) and in that the hydraulic supply of the actuator takes place through appropriate passages produced inside the rod (271) that operates said at least one bolt element (270), this hydraulic supply being able to be conveyed inside said rod (271) through a hydraulic distribution board (272) that has been suitably machined internally for passage of the hydraulic fluid and to which there are fastened suitable hydraulic connectors.
- Quick coupling (250) as claimed in claim 1 or claim 2, characterized in that said auxiliary locking device (290) comprises a hydraulic chamber (281B) containing therein elastic means (284).
- Quick coupling (250) as claimed in any one of claims 1 to 3, characterized in that said auxiliary locking device (290) is hydraulically connected with a check valve (283).
- Quick coupling (250) as claimed in any one of the preceding claims, characterized in that said main body (252) has safety means (251) adapted to oppose transverse shifting of said auxiliary locking element (280) relative to the corresponding said second element (102).
- Quick coupling (250) as claimed in claim 5, characterized in that said safety means (251) comprise a protruding section (251), which covers said auxiliary locking element (280) in a manner substantially mating with a respective lower face (251') to position it stably relative to said second element (102).
- Connection apparatus (1000) characterized in that it comprises at least one quick coupling (250) as claimed in any one of claims 1-6.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT000357A ITBO20130357A1 (en) | 2013-07-10 | 2013-07-10 | QUICK ATTACHMENT, AND RELATED CONNECTION EQUIPMENT, OF A TOOL AND A DRIVE ARM |
EP14175847.4A EP2824243B1 (en) | 2013-07-10 | 2014-07-04 | Connection apparatus for interconnecting an arm and a tool of a work machine |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14175847.4A Division EP2824243B1 (en) | 2013-07-10 | 2014-07-04 | Connection apparatus for interconnecting an arm and a tool of a work machine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3312350A1 true EP3312350A1 (en) | 2018-04-25 |
EP3312350B1 EP3312350B1 (en) | 2020-11-11 |
Family
ID=49118599
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17202832.6A Active EP3312350B1 (en) | 2013-07-10 | 2014-07-04 | Connection apparatus for interconnecting an arm and a tool of a work machine |
EP14175847.4A Not-in-force EP2824243B1 (en) | 2013-07-10 | 2014-07-04 | Connection apparatus for interconnecting an arm and a tool of a work machine |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14175847.4A Not-in-force EP2824243B1 (en) | 2013-07-10 | 2014-07-04 | Connection apparatus for interconnecting an arm and a tool of a work machine |
Country Status (3)
Country | Link |
---|---|
EP (2) | EP3312350B1 (en) |
IT (1) | ITBO20130357A1 (en) |
NO (1) | NO2824243T3 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3770330A1 (en) | 2019-07-25 | 2021-01-27 | Rädlinger Maschinen- und Stahlbau GmbH | Quick changer |
DE102022125112A1 (en) | 2022-09-29 | 2024-04-04 | OilQuick Deutschland KG | Quick coupler |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017079792A1 (en) * | 2015-11-09 | 2017-05-18 | Elite Attachments Australia Pty Ltd | A piston and cylinder system |
GB2544746A (en) | 2015-11-24 | 2017-05-31 | Caterpillar Work Tools Bv | Apparatus and method for assembling work tool to a machine |
IT201800003422A1 (en) * | 2018-03-09 | 2019-09-09 | Cangini Benne Srl | RAPID ATTACK |
SE545709C2 (en) * | 2022-04-13 | 2023-12-12 | Steelwrist Ab | Lock indicator arrangement and method for a quick coupler and quick coupler comprising the same |
DE102022121104A1 (en) * | 2022-08-22 | 2024-02-22 | emtec Engineering & Maschinentechnik GmbH | Coupling device and mobile work machine |
CN118029463A (en) * | 2024-04-07 | 2024-05-14 | 烟台江土机械设备有限公司 | Anti-drop, durable excavator connector |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3243066A (en) * | 1964-01-20 | 1966-03-29 | Caterpillar Tractor Co | Quick change means for loader attachments |
NL7900631A (en) * | 1979-01-26 | 1980-07-29 | Interparts B V | Hydraulic crane retainer fixture to scoop - comprises pin and hook swivel arrangement also pressure cylinder with end pins to fit in spaced lugs |
EP0615023A1 (en) * | 1993-03-10 | 1994-09-14 | Jean-Marie Gérard René Koehl | Device for rotably assembling an arm or similar to two branches of a fork formed element |
DE20215590U1 (en) * | 2001-10-11 | 2003-03-06 | Wimmer, Alois, Hof bei Salzburg | Quick coupling for attaching work tools to an excavator boom |
EP1900880A2 (en) * | 2006-09-12 | 2008-03-19 | Cangini Benne S.R.L. | Device for connecting a tool to a driving means of a working machine |
WO2008051095A2 (en) * | 2006-10-26 | 2008-05-02 | J B Sales International Limited | A coupler |
WO2009137576A1 (en) * | 2008-05-07 | 2009-11-12 | Jrb Attachments, Llc | Zero offset loader coupling system and components |
WO2012061895A1 (en) * | 2010-11-12 | 2012-05-18 | Positti, Nicole Elizabeth | A hydraulic hitch assembly |
EP2584099A1 (en) * | 2010-06-21 | 2013-04-24 | Caterpillar SARL | Quick coupler circuit for construction equipment |
-
2013
- 2013-07-10 IT IT000357A patent/ITBO20130357A1/en unknown
-
2014
- 2014-07-04 EP EP17202832.6A patent/EP3312350B1/en active Active
- 2014-07-04 NO NO14175847A patent/NO2824243T3/no unknown
- 2014-07-04 EP EP14175847.4A patent/EP2824243B1/en not_active Not-in-force
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3243066A (en) * | 1964-01-20 | 1966-03-29 | Caterpillar Tractor Co | Quick change means for loader attachments |
NL7900631A (en) * | 1979-01-26 | 1980-07-29 | Interparts B V | Hydraulic crane retainer fixture to scoop - comprises pin and hook swivel arrangement also pressure cylinder with end pins to fit in spaced lugs |
EP0615023A1 (en) * | 1993-03-10 | 1994-09-14 | Jean-Marie Gérard René Koehl | Device for rotably assembling an arm or similar to two branches of a fork formed element |
DE20215590U1 (en) * | 2001-10-11 | 2003-03-06 | Wimmer, Alois, Hof bei Salzburg | Quick coupling for attaching work tools to an excavator boom |
EP1900880A2 (en) * | 2006-09-12 | 2008-03-19 | Cangini Benne S.R.L. | Device for connecting a tool to a driving means of a working machine |
WO2008051095A2 (en) * | 2006-10-26 | 2008-05-02 | J B Sales International Limited | A coupler |
WO2009137576A1 (en) * | 2008-05-07 | 2009-11-12 | Jrb Attachments, Llc | Zero offset loader coupling system and components |
EP2584099A1 (en) * | 2010-06-21 | 2013-04-24 | Caterpillar SARL | Quick coupler circuit for construction equipment |
WO2012061895A1 (en) * | 2010-11-12 | 2012-05-18 | Positti, Nicole Elizabeth | A hydraulic hitch assembly |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3770330A1 (en) | 2019-07-25 | 2021-01-27 | Rädlinger Maschinen- und Stahlbau GmbH | Quick changer |
DE102022125112A1 (en) | 2022-09-29 | 2024-04-04 | OilQuick Deutschland KG | Quick coupler |
Also Published As
Publication number | Publication date |
---|---|
EP2824243A1 (en) | 2015-01-14 |
NO2824243T3 (en) | 2018-04-21 |
EP3312350B1 (en) | 2020-11-11 |
EP2824243B1 (en) | 2017-11-22 |
ITBO20130357A1 (en) | 2015-01-11 |
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