WO2010063053A1

WO2010063053A1 - Apparatus for the exchangeable accommodation of tools

Info

Publication number: WO2010063053A1
Application number: PCT/AT2009/000471
Authority: WO
Inventors: Helmut Kreilmeier
Original assignee: Wacker Neuson Linz Gmbh
Priority date: 2008-12-05
Filing date: 2009-12-04
Publication date: 2010-06-10
Also published as: AT507598A1; AT507598B1

Abstract

The invention relates to an apparatus for the exchangeable accommodation of tools on a tool manipulator, in particular an excavator boom, or on a vehicle, comprising a quick-release unit (1) on the manipulator side for gripping at least one holder on the tool side, preferably two holders (2) associated with the tool and disposed at a distance from each other, wherein the quick-release unit comprises receptacles (3) for the holders (2) and a locking bar (7) which can be displaced between a release position and a locked position in a guide (6), which is associated with the quick-release unit frame (5), by way of an actuator (4) having a cylinder (8) and a piston (9), and which in the locked position thereof engages at least one holder (2) and secures the respective tool in the receptacles (3). In order to create advantageous design conditions, the locking bar (7) is associated with a preferably spring-loaded securing element (11), which locks the locking bar (7) in the locking position thereof with the quick-release unit frame (5).

Description

Device for exchangeable picking up of tools

Technical area

The invention relates to a device for interchangeable receiving tools on a tool manipulator, in particular an excavator boom, or on a vehicle, with a manipulator-side quick coupler for gripping at least one tool-side holder, in particular at least two associated with the tool and spaced apart holder, wherein the quick coupler Receivers for the holder and a comprehensive with a, a cylinder and a piston, actuator in a quick coupler frame associated guide between a release and a locking position displaceable latch comprises, which engages behind at least one holder in its locking position and secures the respective tool in the recordings ,

State of the art

The main purpose of such commonly used in construction devices is to be able to change as a tool working tool, if necessary, without much time. An exchange of these tools, such as various spoons, drills, tilting blades, chisel, cutter od. Like. More, is often required even several times a day. Such devices for interchangeable recording of tools must also be extremely robust be formed because the entire machining forces are removed via the quick coupler.

For this purpose, a quick coupler is known (AT 410 333 B), can be used with the at an excavator bucket at a distance parallel aligned retaining bolts. These retaining bolts are detected by provided on the quick coupler recordings, in which the retaining bolts are used. One of the two retaining bolts used in the recording is then umgreifbar with a latch that the tool is held captive in the locking position of the bolt in the recordings. A displacement of the bolt from its release in its clamping position takes place by means of a Zylinderkolbeπeinrichtung. A disadvantage of this construction in particular, that od due to the locking - actuator assembly during operation of the quick coupler by contamination in the guide. Like. Can lead to tilting of the bolt in the guide, which hinders trouble-free operation of the device. A similar device is also known from DE 10 2006 049 059 A1, in which the bolt engages in its locking position in a tool provided on the locking tab. However, this device is in particular the disadvantage inherent that with her no standard tools can be used, which include only two spaced-apart retaining bolts, which must be resorted to expensive special tools.

Another way to use standard tools with a quick coupler is to (DE 41 02 370 A1) to equip the quick coupler with four trained in the form of piston retaining bolts which are inserted by means of a pneumatic drive in the corresponding receiving openings of the tool, the four in replace the two retaining bolts used in this case, the four pistons used in this case. A disadvantage of this device in particular that a quick change is often difficult, since the threading of the retaining bolts in the receiving lugs requires considerable skill. Furthermore, quick-change known, which at the same time include a quick release for hydraulic lines (DE 10 2005 027 807 A1). Thus, in addition to a gripping of the tool at the same time a supply of the tool with hydraulic energy can be ensured by coupling a bundle of hydraulic lines.

Usually, the latch is hydraulically or pneumatically held in its locking position. All the aforementioned devices have the disadvantage that in the event of a failure of the actuator, for example, the hydraulic, no adequate backup of the tool is guaranteed in the recordings.

Presentation of the invention

Starting from devices of the above-described type, the invention has for its object to provide a quick release for the interchangeable recording of tools, which is constructed as simple and robust as possible, automated gripping of tools with one, for example, two with spaced-apart retaining bolts comprising coupling, and in the event of failure of the actuator, for example, the hydraulics, ensures adequate assurance of the tool in the recordings of the clutch.

The invention solves this problem in that the latch is associated with a preferably spring-loaded securing element which locks the latch in its locking position with the quick coupler frame and that the bolt required for driving the actuator lines and at least one valve, in particular a pilot-operated check valve, a load-holding valve or a check valve.

In order to avoid a loosening of the bolt in the event of a hydraulic failure, a valve is usually arranged in the return line, which should avoid a pressure loss and thus an unintentional release of the bolt. In order for the Case that this valve does not have the required tightness yet to be able to safely avoid accidental release of the bolt, the latch is associated with a preferably spring-loaded locking element which locks the latch in its locking position with the quick coupler frame, or the latch and the quick-change frame in Locking position of the bolt shear-resistant interconnects. Latches the fuse element of the locking position of the bolt in a corresponding recess on the quick-change frame or latch, in addition to the hydraulic backup also given a mechanical backup, which always ensures a safe failure of the tool in the recordings of the quick coupler in a hydraulic failure. Thus, the bolt is locked in a simple manner in a sliding or rotating guide relative to the quick coupler frame. Particularly robust construction conditions result from the fact that in the bolt all required for controlling the actuator lines and at least one valve, in particular a pilot-operated check valve, a load-holding valve or a check valve, are provided.

According to an advantageous embodiment variant of the invention, the cylinder of the actuating drive is arranged at least for the most part in the bolt and engages the piston used at one end in the cylinder at the other end on the quick coupler frame. The fact that the cylinder of the actuator is at least largely arranged in the bolt increases the height of the bolt or the cylinder is best protected against external influences. Since the piston inserted into the cylinder also acts on the quick coupler frame at the other end, the lifting height required for displacing the latch from the locking position into its release position can be realized with a particularly small overall size. Due to the short free piston or piston rod length, the tilting and thus clamping tendency of the bolt in the guide is further reduced.

Basically, it is in the event that the actuator comprises a displaceable against spring force piston-cylinder assembly sufficiently on the bolt only lent to provide a connection for a leading via the tool manipulator control line. However, if the bolt is to be active, that is to say displaced, for example, by means of hydraulics between the release and locking positions, at least two connections for control lines leading via the tool manipulator are to be provided on the bolt. With appropriate energization of one of these two connections, the piston can be moved alternately into its locking position or release position. The connection is made in the usual way via connected to the hydraulic system of the vehicle hydraulic lines.

For this purpose, a connecting line with the cylinder is preferably provided in the bolt for displacing the bolt into its locking position, wherein in the line a valve, in particular a pilot-operated check valve, a load-holding valve or a check valve, is arranged. Said lines are provided in particular in the bolt holes, which optionally accommodate the valve in a recess interchangeable and easy to maintain. In another line in the bolt a line connecting the other terminal with the cylinder is provided for publishing the bolt in its release position, wherein at least one control line for releasing the securing element and for releasing the unlockable check valve is connected to this line. If the corresponding hydraulic line is actuated by an operator of the device such that the bolt is displaced from its locking position into its release position, the securing element is first unlocked by the applied control pressure, ie the thrust-resistant or rotationally fixed connection between the latch and the quick-change frame is released and the unlockable check valve bypassed or also solved, after which the bolt is displaced with the actuator from its locking position to its release position and releases the recordings or the tool.

In an alternative embodiment variant of the bolt could be displaced by spring force in its locking position and there is a release of the Bar via a cylinder connecting via a connection with the cylinder line for publishing the bolt in its release position, to which line at least one control line for releasing the pilot-operated check valve is connected. If the corresponding hydraulic line is operated by an operator of the device such that the bolt is displaced from its locking position into its release position, the securing element is first unlocked by the impressed control pressure, after which the bolt with the actuating drive is displaced from its locking position into its release position and the receptacles or releases the tool.

If it is to be ensured that the piston can only be displaced out of its locking position when the securing element is open in order to avoid excessive wear or damage to the securing element, a preloading valve can be arranged in a line between the cylinder and the control line connection. The Vσrspannventil ensures that a certain minimum pressure is applied to the spring-loaded securing element, so this is safely opened before the full opening pressure applied to the cylinder. In particular, this results in greater reliability of operation.

If a tool can still be removed from the quick coupler when it is in its locking position befindlichem bolt and a hydraulic failure in a simple and straightforward way, it is recommended that the arranged in the bolt spring-loaded locking element in the locking position of the bolt in a quick coupler frame, preferably in the area the guide provided, protrudes opening, which is preferably equipped on the other side with a releasable closure. If the releasable closure removed, the fuse element can be moved against the force of the spring from its securing position to its release position, after which the bolt can optionally be pushed after its also manually releasing the check valve in its release position and a coupled tool is thus released. To avoid accidental release of the fuse element, a separate power circuit is preferably proposed, with which the securing element can be solved. In particular, it is advantageous for releasing the securing element in the bolt to provide a connection to the securing element or to a securing element associated with the switching valve line. Thus, the fuse element may optionally be additionally or alternatively enabled or disabled via the additional line. In a simple case, a valve which can be actuated via the additional line can be arranged in the control line leading to the securing element, which valve selectively releases or blocks this control line.

Brief description of the drawings

In the drawing, the invention is illustrated schematically using an exemplary embodiment. Show it

1 is a circuit diagram for a device according to the invention,

2 shows a device according to the invention in a partially sectioned cross section with the bolt in clamping position,

2 shows the device from FIG. 2 in a section along the line III-III, FIG. 4 shows the device from FIG. 2 with the latch in the release position, FIG. 5 shows the device from FIG. 4 in section along the line VV, FIG 6 is a circuit diagram of a construction variant of an invention

Contraption,

7 and 8 show a construction variant of the bolt of the device according to the invention from FIGS. 2 to 5 in cross-section and enlarged view with the bolt in the release position or locking position, and FIGS. 9 and 10 show a further design variant of the bolt from FIGS an additionally provided preload valve.

Way to carry out the invention An inventive device for interchangeable receiving tools with a tool manipulator, not shown, in particular an excavator boom, or with a vehicle includes a manipulator-side quick coupler 1 for gripping two associated with the tool and spaced apart retaining bolts 2, wherein the quick coupler receptacles 3 for the retaining bolt 2 and an actuating drive 4 comprises, with a in a quick change frame 5 associated guide 6 linearly displaceably guided latch 7 between a release and a locking position is displaced. The actuator 4 is in the illustrated embodiment, a cylinder 8 and a piston 9 to. In its locking position (FIGS. 2 and 3), the latch 7 engages behind a retaining bolt 2 and thus secures the respective tool in the receptacles 3.

The cylinder 8 of the actuating drive 4 is at least largely arranged in the latch 7, wherein the piston inserted into the cylinder 8 9 engages a piston rod 10 at the other end on the quick coupler frame 5. The bolt 7 thereby includes a spring-loaded securing element 11, which connects the bolt 7 and the quick-change frame 5 in the locking position of the bolt 7 in a shear-resistant manner (FIG. 2).

In the illustrated embodiment, the displacement of the cylinder takes place between release and locking position hydraulically, for which purpose corresponding lines are provided. In particular, all the lines 12, 13 required for actuating the actuating drive 4 and at least one unlockable check valve 14 are provided in the latch 7. Furthermore, the latch 7 has at least two connections 15, 16 for control lines leading via the tool manipulator to a hydraulic system.

In this case, a terminal 16 connecting the terminal 16 with the cylinder 8 is provided in the latch 7 for displacing the bolt 7 in its locking position, wherein in the conduit 12 a pilot-operated check valve 14 is arranged is. Furthermore, in the latch 7, a connection 15 to the cylinder chamber on the opposite side connecting the piston 13 is provided for displacing the bolt 7 in its release position, to this line 13, a control line 17 for releasing the securing element 11 and for releasing the pilot-operated check valve fourteenth followed. For this purpose, the securing element 11 comprises a spring-loaded piston-cylinder arrangement, wherein the securing element 11 is displaceable with its acting on the line 15 and thus on the control line 17 control or hydraulic pressure from its locking position to its release position.

Furthermore, the arranged in the latch 7, spring-loaded securing element 11 protrudes in the locking position of the bolt 7 in a provided in the quick coupler frame 5, the quick coupler frame 5 in the region of the guide 6 through hole 18, which on the other side with a releasable closure 19 in the illustrated embodiment a screw cap is equipped.

In the circuit diagram of FIG. 6, a biasing valve 20 is additionally provided in the line 13, which ensures that the latch 7 can be displaced only when the fuse element 11 is open in its release position. Alternatively or additionally, to release the securing element 11 in the latch 7, a line 22 connecting a connection 21 with the securing element 11 or with a switching valve assigned to the securing element 11 can be provided. This can be ensured that at least two actions must be made to unlock the bolt 7 by an operator, whereby an accidental release can be prevented.

7 to 10 show design variants of the device according to the invention, in particular in a cross section through the latch 7, wherein in particular the integrated according to the invention in the latch lines, valves and the fuse element can be seen. By arranging all components relevant for the switching operation in the latch 7 it is ensured that only a small number of exposed and thus easily destructible hydraulic components must be provided. Damage to these parts from the outside is not to be feared as a result of the solid construction of the bolt 7.

Claims

Patent claim:

1. A device for interchangeably receiving tools on a tool manipulator, in particular an excavator boom, or on a vehicle, with a manipulator-side quick coupler (1) for gripping at least one tool-side holder, in particular at least two tools assigned to the tool and spaced apart holder (2) , wherein the quick coupler receptacles (3) for the holder (2) and one with a, a cylinder (8) and a piston (9) comprising, actuator (4) in one of the quick coupler frame (5) associated guide (6) between a Release and a locking position displaceable bolt (7) which engages in its locking position at least one holder (2) and the respective tool in the receptacles (3) secures, characterized in that the latch (7) has a preferably spring-loaded securing element (11 ) is associated, which locks the latch (7) in its locking position with the quick coupler frame (5) and that the latch (7) receives the lines (12, 13) required for actuating the actuating drive (4) and preferably at least one valve (14), in particular a pilot-operated check valve, a load-holding valve or a check valve.

2. Device according to claim 1, characterized in that the cylinder (8) of the adjusting drive (4) is arranged at least for the most part in the bolt (7) or is formed by the bolt (7) and that the piston inserted into the cylinder (8) at one end 9) via a piston rod (10) at the other end on the quick coupler frame (5) engages.

3. Apparatus according to claim 1 or 2, characterized in that, on the bolt (7) at least two terminals (15, 16) are provided for leading over the tool manipulator control lines.

4. Device according to one of claims 1 to 3, characterized in that in the latch (7) has a connection (16) with the cylinder (8) connecting line (12) is provided for displacing the bolt (7) in its locking position, wherein in the conduit (12) a valve (14), in particular a pilot-operated check valve, a load-holding valve or a check valve, is arranged.

5. Device according to one of claims 1 to 4, characterized in that in the latch (7) has a connection (15) with the cylinder (8) connecting line (13) for displacing the bolt (7) is provided in its release position, wherein on the line (13) preferably a control line (17) for releasing the securing element (11) and for releasing the valve (14) is connected.

6. Apparatus according to claim 5, characterized in that in the conduit (13) between the cylinder (8) and the control line connection, a biasing valve (20) is arranged.

7. Device according to one of claims 1 to 6, characterized in that in the bolt (7) arranged spring-loaded securing element (11) in the locking position of the bolt (7) in a quick coupler frame (5), preferably in the region of the guide (6). provided, opening (18) protrudes, which is preferably equipped on the other side with a releasable closure (19).

8. Device according to one of claims 1 to 7, characterized in that for releasing the securing element (11) in the bolt (7) connecting a connection (21) with the securing element (11) or with a securing element (11) associated switching valve Line (22) is provided.