Classifications

• • 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
  • E02F9/20—Drives; Control devices
  • E02F9/22—Hydraulic or pneumatic drives
  • E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
  • E02F9/2267—Valves or distributors
• • 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
  • E02F3/3654—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat with energy coupler, e.g. coupler for hydraulic or electric lines, to provide energy to drive(s) mounted on the tool

Definitions

• the invention relates to a quick-change device with a hydraulic coupling for media on a construction device according to the preamble of patent claim 1.
• a first embodiment of a quick-change device is known, for example, from EP 0 483 232 B1, in which the quick-change device comprises a pivoting and locking device
• Quick coupler and an adapter plate is.
• the quick coupler is the excavator-side stem and the opposite, with the quick coupler to be coupled adapter plate is a replaceable tool, eg. B. an excavator bucket assigned.
• the swivel lock described in the cited document first provides a merge of a hydraulic coupling of the media prior to the production of the lock between the adapter plate and quick coupler.
• Such media couplings must be brought together over a relatively wide pivoting. Since coupling valves of the hydraulic clutch are brought together before the pivoting of the quick coupler to the adapter plate and liquid-tight, there is the disadvantage that very large, dirt-contacting surfaces are present, which lead to a dirt entry into the oil circuit when connecting the media feedthrough.
• the said hydraulic couplings are arranged completely free in the space between the adapter plate and the quick coupler and therefore not suitable to work properly in Schmutzbelasteter environment.
• the immersion of the associated media clutches during the pivoting movement of the adapter plate relative to the quick coupler is connected to a very long pivoting path, which means that the two media clutches touch each other over a very long pivoting and immersion path and rub against each other. As a result, the wear is very high.
• the invention is therefore the object of developing a quick-change device with a hydraulic coupling for media on a construction equipment according to the preamble of claim 1 such that at we considerably longer life and less wear 5 reaches a cost-effective and reliable working hydraulic clutch and thus media feedthrough becomes.
• the invention is based on the knowledge that
• an essential feature of the invention is also that the device for the secondary alignment, the floating mounting of a coupling valve, z. B. the upper coupling valve, and is formed in the form of an elastomeric Abdrückelements which presses against a fixed part of the quick-change device and acts with at least two mutually parallel surfaces with central biasing force on the coupling valve.
• a mutually associated coupling valve is provided in each case at the free, pivotable end of the quick coupler and the adapter plate.
• the push-off element is preferably designed as elastomeric rubber, which is associated with the advantage that the push-off element now simultaneously performs sealing and func- / compensation functions.
• the elastomeric pressure-exerting element is self-contained and preferably forms a spectacle-shaped receiving space, so that it is formed with circumferential walls.
• the encircling walls provide a self-contained Abdrückelement which is arranged with its upper end faces on the upper side of a yoke of the quick coupler, while the lower end faces press on the upper side of the upper coupling valve.
• this push-off element By forming this push-off element as an oval hollow part, there is the further advantage that now an inner receiving space is formed between a stationary yoke of the quick-change valve and the floating valve disposed beneath it, which is arranged in particular in a valve block, preferably with a flowable grease is completed. In this way, the floating function of the upper coupling valve is always ensured because the trapped in the receiving space grease ensures a reliable seal the floating storage under all aggressive environmental conditions.
• the pressing member has relatively large wall thicknesses of z. Eg 5-
• the push-off element is pretensioned between the upper coupling valve and the lower coupling valve and the intended, thick wall thicknesses ensure that the push-off element does not buckle, but deforms in the direction of the axial pushing movement (plunging movement of the valve).
• a lateral buckling, bulging is indeed not prevented, but it is provided for an absolutely central deformation of this Abdschreibisses.
• An idea of the invention is thus also that an elastomeric pressure element is used both as a sealing element and as a pressure element itself, which is associated with a much higher reliability and reliability of the entire arrangement.
• the entire floating suspension of the upper coupling valve is hermetically sealed by the Abdrückelement invention and the purity of the closed interior is prepared by filling with fluid grease or graphite foam or other suitable medium and always maintained.
• fluid grease or graphite foam or other suitable medium As far as aggressive wastewater and dirt loads could get into the contact surfaces between the mutually associated coupling valves, a water injection of the mutually associated and successive dipping contact surfaces of the coupling valves is also provided.
• the push-off element biases the upper coupling valve against the housing-fixed yoke in the idle state with a certain bias.
• This hydraulic damper dampens load surges acting on the contact surface between the upper and lower coupling valves, especially when the excavator tool is a hammer drill, which penetrates into the ground with high acceleration forces and initiates corresponding acceleration shocks on the connection surface between the upper and lower coupling valves.
• the hydraulic damper can be realized either by a separate component above the elastomeric Abdschreibianas or by the elastomeric Abdschreibelement itself.
• Figure 1 is a schematic representation of a quick-change device according to the invention in the open state
• FIG. 2 shows the quick-change device of FIG. 1 in the closed state, showing further details
• Figure 3 is an enlarged sectional view of the hydraulic clutch of the quick-change device of Figure 2 in the not-connected state;
• Figure 4 is an enlarged sectional view of the hydraulic coupling of the quick-change device of Figure 2 in the connected and liquid-conducting state;
• Figure 5 is the side view of the elastomeric Abdschreibianas
• Figure 6 is a plan view of the elastomeric Abdschreibelement
• Figure 7 shows the top view of the quick-change device in the direction of the quick coupler.
• the quick-change device according to Figures 1 and 2 essentially comprises a quick coupler 30 and an adapter plate 12, in front of which the quick coupler 30 is fixed to a boom, not shown, also not shown earth moving machine and the adapter plate 12 associated with the work implement also not shown and is firmly connected to this.
• the adapter plate 12 comprises a base plate 14 on which a locking plate 16 is welded at one end and a pivot axis / coupling axis 19 at the remote end by means of fastening straps 17.
• the locking plate 16 has on the side facing the coupling axis 19 a clamping surface 20, which is inclined to a vertical surface of the adapter plate 12 by 3 ° to 35 degrees, preferably by 5 to 15 degrees.
• the locking plate 16 is further provided with two cone openings 21 arranged at a distance from one another and conically shaped in longitudinal section, arranged parallel to one another.
• Each cone breakthrough 21 is associated with an associated latch bolt 36 which can be displaced into it.
• the front end of the locking bolt 36 is formed in each case as a cone end 50.
• the cone angle of the conical openings 21 which are delimited by the conical surface areas is dimensioned correspondingly and in the exemplary embodiment shown is 5 ° to 15 °.
• the approximately rectangular quick coupler 30 has on its side surfaces depending on a receiving claw 31, which engage around the coupling axis 19 in the retracted state.
• the front surface of the quick coupler 30 located between the receiving claws 31 merges into a cylindrical jacket-shaped abutment surface 32 which, in the retracted state, is supported on the cylinder jacket surface of the coupling axis 19.
• the opposite end face 34 is by 3 to 35 degrees, preferably by 5 to 15 degrees, relative to the vertical - corresponding to the clamping surface 20 of the locking plate sixteenth
• Each locking bolt 36 has a spring arranged in a blind bore, which is supported with its free end on a spring plate, which is associated with the end face of an angle lever.
• the angle lever is
• FIGS. 1 and 2 form a toggle mechanism, which is driven via a control shaft.
• Zentrierorgane When lowering the quick coupler 30 on the adapter plate 12 of the implement Zentrierorgane are provided, of which the quick coupler 30 associated Zentrierorgane are designed as cylindrical pins 52 which in the flat end face 34 on both sides the sliding latch bolt 36 are located. The centering pins 52 cooperate with surfaces of the latch plate 16.
• Quick coupler 30 on the adapter plate 12 are aligned as a result of these inclined surfaces of the quick coupler and thus the sliding latch bolt 36 with respect to the cone openings 21 in cooperation with the coupling axis 19 and thus centered.
• Coupling between the locking bolt 36 and the openings 21 can be done without interference.
• a lower coupling valve, a lower valve part 1, by means of a Anschraubblockes 13 is attached at the rear free end of the adapter plate 12.
• the further attachment takes place on the latch plate 16.
• the lower valve part 1 forms an upper connection surface 2 which cooperates with the lower connection surface 5 of an upper coupling valve, a valve upper part 3. In the area of these two pads 2, 5 is the to be described later media delivery of the hydraulic clutch.
• the adapter plate 12 is clamped without play on the clamping surface 20 of a fastened to the adapter plate 12 latch plate 16.
• FIG. 2 shows that the locking between the adapter plate 12 and the quick coupler 30 is already made in the direction of the arrow 6, because the respective locking bolt 36 has already partially retracted into the konoidal recess - cone opening 21.
• the adapter plate 30 is connected to a suspension 7, which has four spaced-apart receivers 8, 9, through which engage the bolts of an excavator handle.
• the upper part 3 of the valve is fixed in a floating manner to a yoke 4 of the quick coupler, which in turn is fastened to the top of the quick coupler 30 via fastening screws 71.
• the withdrawal force for the floating bearing is achieved by an elastomeric push-off element 40, which is arranged between the yoke 4 and the valve upper part 3 sealing.
• FIG. 2 further shows that with increasing impressions of the cone end 50 into the cone opening 21, an axial lifting movement takes place in the direction of the arrow of the valve upper part 3 in the direction of the stationary lower part 1. This lifting movement is sufficient to bring the short-stroke designed two valve body of the two coupling valves 1, 3 in the open position and thus to connect liquid-conducting together.
• FIG. 3 shows further details in an enlarged view of FIG. 2.
• valve 1 has a Anschraubblock 13 which is screwed with the interposition of wear plates 15 on the latch plate 16.
• the lower part of the valve 1 consists of the Anschraubge- screwed housing 72 in the Anschraubblock 13, the interior of which is spring-loaded slidably mounted in the valve housing 18.
• valve body 23 is screwed firmly and immovably, the s with its cone surface on an associated conical surface in the region of the floating spring-loaded Ventilgephaseu- ses 18 sealingly applies.
• the valve upper part 3 is - as stated - floating and mounted on the yoke 4, first in the region of a recess, an upper sealing washer 10 is arranged below which a number of parallel and mutually spaced guide screws 38 are arranged.
• Each coupling valve 1, 3 is associated with a guide screw 38.
• a number of clutch valves 1, 3 arranged parallel to one another are provided, as shown in FIG. 7 as an example.
• a total of five coupling valves 1, 3 are provided to allow five media flows.
• more or fewer clutch valves 1, 3 can be arranged in pairs, with each clutch valve 1, 3 preferably being assigned a guide screw 38 for the floating suspension.
• the bolt passes through a guide piece 39, which is firmly connected to the bolt and which is supported by a lower shoulder on the upper side of the valve block 29.
• the guide piece 39 forms a radially encircling collar, which forms a radial clearance 42 in the direction of the recess in the yoke 4.
• the head of the guide piece 39 rests on a bearing surface 41 in the region of the recess in the yoke 4.
• the elastomeric push-off element 40 In the neutral position shown, the elastomeric push-off element 40 is already biased and thus presses the valve block 29 with high biasing force down, centering it at the same time and thus exerts a parallel centering force on the entire surface of the valve block 29.
• the clearance 43 is maintained over the entire length of the valve unit according to FIG.
• the elastomeric push-off element 40 supports the top and bottom in circumferential, self-contained and mutually parallel receiving grooves 44, wherein the upper receiving groove in the yoke 4 and the lower receiving groove in the valve block 29 is arranged.
• this inner receiving space 48 according to FIG. 3 is filled with a fluid grease 49 or another suitable flowable material, such as e.g. , B. graphite foam, filled.
• the push-off element 40 provides a centering push-off force on the valve block 29 and additionally a seal, because the entire receiving space 48 is hermetically sealed from the outside world.
• the floating support of the valve block 29 is thus protected against the ingress of dirt and corrosive waters.
• the push-off element 40 also serves as a seal against suction.
• a negative pressure is created in the receiving space 48, which must not suck in dirt and wastewater.
• the seal of the push-off element 40 in the area of the mutually opposite receiving grooves 44 also serves to suck in dirt and waste water.
• a water supply guide 45 is provided, which opens into a longitudinal direction over the entire length of the valve block 29 extending longitudinal bore 46.
• FIG. 3 shows that the elastomeric push-off element 40 is pretensioned with the aid of the guide screws 38. This bias ensures a stable
• FIG. 4 shows the flow through the coupling valves 1, 3 when the cone end 50 of the locking bolt 36 has been completely retracted into the cone opening 21 in the form of an overstroke.
• Valve bottom 1 leads, so that the two coupling valves 1, 3 are pressed against each other.
• the upper valve body 27 seals with the sealing seat 28 assigned to its conical surface in the valve upper part 3.
• the valve body 27 is in this case pressed under the force of a spring in the closing direction of the sealing seat 28.
• the displacement movement is so strong that it deforms the Abdschreibelement 40 according to Figure 4 and at the same time lifts the guide piece 39 from its support surface 41.
• valve upper part 3 is associated with the Einschraubgepatuse 26, which is screwed into the valve block 29.
• FIG. 4 shows, as a further exemplary embodiment, the addition of a hydraulic damper 57, in order to effectively dampen movement shocks on the floating upper part 3 of the valve.
• the hydraulic damper 57 is used, which consists as a housing-side conclusion of an upper, sealed, inserted in a recess in the yoke 4 cover 58, which is held fixed in position by means of circlips 59.
• the lid 58 defines on its underside a
• Pressure chamber 61 which communicates with an oil hole 60. About this oil hole 60, pressure oil is introduced. The pressure oil leads to the displacement of a two-part piston 62, 63. '
• the oil hole 60 is incidentally on an external bladder accumulator, which calms the shocks, which act on the floating bearing of the valve upper part 3.
• the two-part piston consists of the outer piston 63 which is slidably guided in the cylinder chamber and in which a piston of smaller diameter 62 is slidably guided.
• the inner piston 62 rests on an abutment collar 64 of the outer piston 63. This forms a distance to a fixed stop 73 on the cylinder chamber.
• the hydraulic damper therefore biases the elastomeric push-off element 40 in its direction of force.
• the receiving space 48 is instead of a fluid grease 49 or another, sealing liquid filled with a liquid and / or gaseous pressure medium.
• This pressure medium fills the receiving space 48 with an arbitrary overpressure of 0.1 to 5 bar and on the one hand changes the Abdrück , but on the other hand also acts as a damping for transmitted there load surges.
• the push-off element 40 can also form a closed pressure chamber. This is achieved by forming the Abdrückianas as a closed tube, which is arranged in the intermediate space between the yoke 4 and the valve block 29.
• Figure 4 shows that the valve body 1 with a
• Oil connection 55 and the valve upper part 3 with an oil connection 54 is in communication.
• the Anschraubblock 13 of the valve base 1 is fixed by means of fastening screws 53 to the latch plate 16.
• FIGS. 5 and 6 show further details of the elastomeric push-off element 40. It is approximately oval or brilloule-shaped, as shown in FIG. It has relatively strongly dimensioned side walls 66 and end walls 65, which have a great resilience due to their wall thickness.
• the height of the walls as a whole is a measure of the required, elastomeric restoring force of Abdrückianas 40.
• the push-off element 40 forms in its interior a series of semi-open and inter-overlapping. outgoing recesses 67, because in each recess 67 in each case a valve upper part 3 engages. Therefore, according to FIG. 7, a number of valve upper parts 3 are mounted together in the push-off element 40.
• the recesses are separated from each other by elastomeric intermediate walls 70. Again, thus, the elastomeric resilience is on each, there engaging in the respective recess 67 valve upper part 3, controlled.
• the push-off element is designed only as a cup-shaped individual part.
• the elastomeric Abdrückelement forms relatively stiff side walls 66, which are connected to one another via arcuate end walls 65 material integrally.
• FIG 7 shows the top view of the entire arrangement according to Figures 1 to 3, where it can be seen that a number of parallel juxtaposed lids 58 are provided for sealing in the yoke 4. Under these covers the respective hydraulic damper 57 is arranged and in turn in each case a valve upper part 3, which is floatingly mounted.

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• Engineering & Computer Science (AREA)
• Mining & Mineral Resources (AREA)
• Civil Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Structural Engineering (AREA)
• Mechanical Engineering (AREA)
• Quick-Acting Or Multi-Walled Pipe Joints (AREA)
• Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (2)

Family

ID=34963407

Family Applications (1)

Country Status (7)

Cited By (1)

Families Citing this family (9)

Family Cites Families (6)

• 2004
  • 2004-03-24 DE DE102004014823A patent/DE102004014823B4/de not_active Expired - Lifetime
• 2005
  • 2005-03-24 EP EP05716382A patent/EP1727945B1/fr active Active
  • 2005-03-24 SI SI200531384T patent/SI1727945T1/sl unknown
  • 2005-03-24 PL PL05716382T patent/PL1727945T3/pl unknown
  • 2005-03-24 ES ES05716382T patent/ES2368029T3/es active Active
  • 2005-03-24 AT AT05716382T patent/ATE515601T1/de active
  • 2005-03-24 WO PCT/EP2005/003198 patent/WO2005093172A1/fr active Application Filing

Non-Patent Citations (1)

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