JPS5841381B2 - quick coupling device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for automatically connecting a tool attachment supported on a loader or other tool carrier with a tool, particularly a type of tool having a device hydraulically controlled from the tool carrier. The present invention relates to a quick coupling device.

Coupling devices of this type and with various structures are known in the art, but all these known devices only offer the possibility of mechanically locking the tool attachment to the tool. Not too much.

Previously, tools with hydraulic functions required connection of the hydraulic control system by manually connecting several hoses.

As a result, some of the advantages of mechanical locking are lost.

This is because the operator must exit the loader to connect the hydraulic control system.

It is therefore an object of the present invention to solve this problem and provide an automatic coupling device of such characteristics that when the tool attachment is mechanically locked to the tool, the hydraulic control system can also be connected at the same time. .

The present invention will be described in more detail below with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 designates a tool attachment, which is pivotally supported in a known manner via a trunnion 2 at the end of the lifting arm 3 of the loader.

This pivoting of the loader about the trunnion 2 is effected by one or more hydraulic cylinders (not shown) via a linkage 4.

The linkage 4 is pivotally connected to the tool attachment 1 via an inclined arm 5 at a certain distance from its pivot axis.

Reference numeral 7 designates a mounting device for the tool attachment 1 formed on the tool 6, which mounting device is provided with a retaining hook 8 and a retaining eye 9 in a known manner.

The mounting device 7 also has a curved shape similar to that of the tool attachment 1 in the illustrated embodiment and has a support surface 1.
0 are facing each other.

Said tool 6, shown in FIGS. 1 and 2 in the form of a wood hook, is connected to the tool attachment 1.
When the attachment is connected to
Then, the tool attachment 1 is swung around the transport boom 11 toward the inside of the tool and brought into contact with the mounting device 7 .

In this position the fixed latches or retaining eyes 9 of the mounting device are fastened with each of its holes just in front of a locking pin 12 provided in the quick coupling device and on the stand 13 of the tool attachment. The movable latch is located between the guide sleeve 14 (see FIGS. 3 and 4) for the stop member or locking pin 12.

In FIGS. 3 and 4, the two locking pins 12 are shown in the locked and released positions, respectively, and the retaining eye 9 is not shown.

When the tool attachment 1 is swung into the tool mounting device 7, said locking pin 12 is thus in the position shown in FIG.

Each of the two locking pins 12 is connected to a piston 15 within the same double-acting hydraulic cylinder 16.

The cylinder has a connecting member (not shown) for supplying hydraulic oil between the two pistons 15 or to the two ends of the cylinder.

Thus, when pressurized oil is supplied into the cylinder 16 between these two pistons, these pistons are moved apart from each other, thus forcing the two locking pins 12
will lock the retaining eye 9 of the tool mounting device 7, said eye 9 being inserted between the guide sleeves 14.

When pressurized oil is supplied to the two ends of the cylinder, the two pistons 15 are returned, the mechanical locking action is released, and the tool attachment 1 can be removed from the tool 6.

In the embodiment shown in FIG.
2 cooperate in each case with a guide pin 20, which is coaxial with the respective lock pin and is movably supported in a slide bush 21 mounted on the stand 13.

Two pull-out rods 22 and 23 are provided in a slide bush 19 attached to the stand 13 and are mounted parallel to the two lock pins 12, and the rod 22 is inserted into the right guide pin 20 through the intermediate piece 24. Connected, one side rod 23
is connected to the left guide pin 20 via the intermediate piece 24.

Each pullout bar 22 and 23 is shown in a compressed state in FIG. Spring 25 centered by 27
or activated by a corresponding member.

Mounted on each withdrawal rod 22, 23 is a coupling piece 28, which is one part 29a and 30a (hereinafter referred to as and the other portions 29b and 30b,
These parts 29b, 30b (ie the female parts) are arranged on the tool mounting device γ as shown in FIG.

A cross section is shown in FIG. 3, in which the right coupling piece 28 supporting said male part 30a is connected to the left pullout rod 2.
3, visible in the opening 34 in the cover sheet 35, and supporting said male part 29a, the left-hand coupling piece 28 is connected to the right-hand pull-out rod 22.

When the pistons 15 in the hydraulic cylinders 16 are moved away from each other, after a predetermined delay time said extraction rods 22 and 23 are moved in opposite directions against the action of their respective springs 25, two coupling pieces 28
are moved towards each other, said male parts 29a and 30a of the hydraulic hose coupling respectively being moved towards the corresponding female part 2.
9b and 30b.

It should be noted that this action occurs after the mechanical locking action via the locking pin 12 has taken place.

Female parts 29b and 30b of the two hose couplings
Although details are not shown in Fig. 3 or 4,
As shown in FIG. 2, the guide lock 36 on the tool mounting device 7 is provided in a stationary state.

The block 36 includes a passage (not shown) connecting the female part to a conduit leading to the hydraulic cylinder of the tool and is spring-suspended or otherwise mounted in a holder 37 mounted on the mounting device 7. and is arranged to be guided into a corresponding guide block 38 on the tool attachment 1 when said tool attachment 1 is swung inwardly into the tool attachment device γ. ing.

To facilitate this guiding movement, at least the guide block 36 can be formed with an inclined end portion.

The guide block 38 on the tool attachment 1, whose structure is shown in more detail in FIGS. 3 and 4, is provided with recesses 39 for the male parts 29a and 30a.

When the tool attachment 1 is brought into contact with the mounting device 7, the male and female parts 29a, 30a and 29b, 30b of the two hydraulic hose couplings are placed in exact alignment.

In this position the withdrawal rods 22 and 23 are moved by the piston 15 which slides apart in the hydraulic cylinder 16 and the male parts 29a and 30a of the hose coupling
are inserted into the corresponding female parts 29b and 30b.

An automatic coupling of the hydraulic control system to the hydraulic cylinder on the tool 6 thus takes place.

FIG. 7 shows a hydraulic wiring diagram for the embodiment according to the invention shown in FIG.
This also applies to the embodiment shown in FIG.

In Figure 7, the hydraulic cylinder of the tool is designated by the reference numeral 40 and is connected by conduits 41 and 42 to the female parts 29b and 30b of the two hydraulic hose connections, respectively.

Furthermore, the hose connection members 29 and 30 have their male parts 29
a, 30a to a control valve 45 located in the loader or tool carrier via conduits 43 and 44, respectively.

Said control valve 45 has two operating positions A and B and a C or neutral position and is connected to the hydraulic pump via a conduit P.
It is connected via a return conduit T to the hydraulic tank.

The connecting tubes for the two ends of the hydraulic cylinder 16 are indicated by 46 and are connected to the conduit 44.

A conduit 43 is connected to the hydraulic cylinder 16 between its two pistons 15 via a pilot-controlled check valve 47 .

A control valve 48 is provided for controlling the check valve 47, which control valve 48 is connected between the conduits 43 and 44 and is electrically controlled by a control device 48a in the loader.

This control valve 48 has two positions I and I and is connected to the check valve 47 via a pilot conduit 49.

A check valve 50 is provided in the connecting pipe between the control valve 48 and the conduit 43, which check valve 50 always blocks the pilot pressure originating from the conduit 43, and in the control valve position I, the check valve 47 The pilot pressure remaining in the check valve 47 can be released.
Keep it safely closed.

During coupling, the control valve 45 is set to position A, and pressurized oil is supplied to the piston 15 through the conduit P and the conduit 43.
It is pumped into the hydraulic cylinder 16 during this period.

The pistons 15 are thus moved apart from each other,
providing a mechanical locking of said retaining eye 9 to the tool attachment 1 and coupling parts 29 a , 29 b : 30 a of said two hose couplings;
t 30 b are locked together as described above.

Before these hose couplings are coupled to each other, the hydraulic pressure in the conduit 43 is stopped by a check valve provided in the male part 29a of the hose coupling 29, which check valve is used to connect the hose couplings to each other. It is opened only after the

Check valves are also provided in the female parts of the two hydraulic hose couplings, which prevent oil in the tool hydraulic system from escaping when the two hose couplings 29 and 30 are pulled apart. has been done.

After connecting the two hose couplings 29 and 30, position A is used to move the piston in the hydraulic cylinder 40 in one direction.

By moving the control valve 45 to position B, the cylinder 40
The piston inside is forced to move in the opposite direction.

In this case, control valve 48 occupies position I.

When the tool 6 is removed from the tool attachment 1, the control valve 45 is moved to position B and the control valve 48 is moved to position - via the control device 48a.

The check valve 47 is then opened, pressurized oil is delivered via conduits 44 and 46 to both ends of the hydraulic cylinder 16, and the two pistons 15 are moved back towards each other.

Next, when the pistons 15 are brought into close contact with each other, the lock pin 1
2 are moved from corresponding guide pins 20, and springs 25 provided at both ends of said extraction rods 22 and 23 enable said extraction rods 22 and 23 to be moved, as it were, against each other, so that these hose cups Release the ring parts from each other.

This releasing action takes place before the locking pin 12 releases the retaining eye 9 on the tool mounting device T.

The embodiment of the automatic quick coupling device of FIG. 4 according to the invention differs from the embodiment shown in FIG. 3 in that in the embodiment of FIG.
each intermediate piece is fastened onto each of the pull-out rods 22.
, 23.

These pull-out rods 22 and 23 are also provided in a sleeve 54 in the stand 13 in this embodiment, and are attached to a removable plate 52.
and a support part 53 connected to the end of the pull rod.

Thus, when the locking pins 12 are moved apart from each other into the guide sleeve 14 and the retaining eye 9 on the mounting device γ is locked, said intermediate piece 24 is moved together with the associated extraction rod and the corresponding support part It stops when it comes into contact with.

These withdrawal rods are thus actuated to remove said part 29 a 29 b t 30 a of the hose coupling.
, 30b are connected to each other, and at the same time the spring 51 is compressed, so that when the hose couplings 29 and 30 are removed, the repulsive force of the spring 51 can be utilized.

Substantially the same wiring diagram can be used in this embodiment as for the embodiment shown in FIG.

5 and 6 show a further modified embodiment of the automatic quick coupling device according to the invention.

In this embodiment, a guide roller 55 is supported on each piston or piston rod 15 of the hydraulic cylinder 16 and between the cylinder itself and the lock pin 12.

This guide roller is in contact with a guide surface 56 on an arm 58 pivoting about an axis 57 , which is in contact via a pressure roller 59 with a stop 60 on the coupling piece 28 .

Said coupling piece 28 includes one quick-coupling male part 29a.

In this embodiment, the coupling piece 28 with its male part is movably mounted in a bushing 61 in the stand 13, with a spring 63 clamping between the bushing 61 and a lock washer 62 on the coupling piece. has been done.

This spring 63 presses the coupling piece 28 against the pressure roller 59 and presses the arm 58 against the guide roller 55.

A female portion 29b is shown on the front side of one male portion 29a.

When pressurized oil is supplied between the pistons 15 of the hydraulic cylinder 16, the locking pins are moved into the corresponding retaining eyes, and at the same time the guide rollers 55 move against the guide surfaces 5 on the arms 58.
Move along 6.

The arms are thus swung around their axis 57 and the coupling piece 28 is moved against the action of the compression spring 63.

The male parts 29a and 30a of the hose coupling are thus connected within the corresponding female parts 29b and 30b, and in this connected position these parts are held by guide rollers 55 as shown in FIG.

When said guide roller 55 is thus moved in the other direction, the compression spring 63 can release the corresponding hose coupling, thereby breaking off the hydraulic connection of the tool hydraulic cylinder).

FIG. 8 shows a hydraulic wiring diagram that can be used in particular for the embodiments shown in FIGS. 5 and 6.

A two-position, six-way valve 65 is used here, to which the conduits 43 and 44 to the hose couplings 29 and 30 are connected directly.

The conduit is further connected via conduits 66 and 67 to a control valve 45 located within and controlled from the loader.

Furthermore, in this embodiment the hydraulic cylinder 16 is connected to the conduit 6.
8 and 69 directly to the valve 65.

The eighth hose coupling 29 and 30 are connected
In the position shown, pressurized oil flows from valve 65 via outlet 1, conduit 43, hose coupling 29 and conduit 41 to hydraulic cylinder 40, and return oil from the cylinder flows through conduit 42, hose coupling 30. and via conduit 44 to inlet 2 in valve 65 .

When it is desired to move the piston of the hydraulic cylinder 40 in the opposite direction, the control valve 45 is moved from the illustrated position B to the illustrated position A.

In order to connect the tool attachment 1, the valve 65 is
4, the control valve 45 is moved to position A.

When this attachment is removed, the control valve 45 is moved to position B and the valve 65 is set to positions 3 and 4.

In FIG. 9, a hydraulic diagram of a slightly modified embodiment is shown, which differs from the embodiment shown in FIGS. 5 and 6 in the arrangement of the hose couplings 29, 30.

As shown in FIG. 9, a portion of the hose coupling, such as the male portions 29a, 30a, is each attached to the end of the locking pin 12, and a second portion of the hose coupling, such as the female portions 29b, 30b, is attached directly to the end of the locking pin 12. Attached to the tool in front of each locking pin.

The male parts 29a, 30a are then moved relative to the female parts 29b, 30b to the locked position shown in FIG.
These parts are connected to each other.

This operation is performed at or after the locking pin 12 reaches its final locking position as shown in FIG.

Conduits 43 and 44 each lead from valve 65 to lock pin 12;
More precisely, it is connected to a passage 70 formed inwardly in the corresponding locking pin.

The passageway 70 is then connected to the hose coupling section 29a.
and 30a.

No. 9 to which hose couplings 29 and 30 are connected
In the position shown in the figure, the pressurized oil is thus routed from the valve 65 to the outlet 1, to the conduit 43, to the passage 70, to the hose coupling 2.
9 and the female part 29b of the coupling 29 into the hydraulic cylinder 40, from which return oil can flow through the conduit 42, the hose coupling 30 and the passage 70 in the locking pin 12. and flows into conduit 44.

Conduits 43 and 44 should be of a flexible type to accommodate movement of the locking pin.

In the embodiment shown in FIG. 10, the tool is provided with two working cylinders 100 and 100a, respectively.

The hydraulic cylinder 100 is connected via conduits 102.103 to a pair of hose couplings 104.105;
The hose couplings 104 and 105 are connected and disconnected via a control device 106, respectively.

The controller 106 connects the control valve 10 from the control panel 108.
It is electrically controlled via 7.

Similarly, the hydraulic cylinder 100a has a pair of hose couplings 104a.

105a, and the hose couplings are respectively connected and disconnected via a control device 106a,
The controller 106a connects the control panel 108 to the control valve 10.
7a.

A control valve 109 is also electrically controlled from the panel.

The control valve 109 corresponds to the valve 65 in the previous embodiment and mechanically connects the tool carrier to the tool and to each other via a locking pin 12 movable into engagement with the retaining eye 9 of the mounting device 7. It is used to make

When an operator actuates control valve 109 from control panel 108, hydraulic fluid can flow between the pistons within hydraulic cylinder 16.

These pistons serve to move the locking pin 12 into the locked position shown in FIG. 10, thereby establishing a mechanical connection between the tool carrier and the tool.

When the locking pins 12 assume this position, a transducer 110 connected to one of the locking pins is actuated and generates a signal at the control panel 108 indicating to the operator that the mechanical connection is complete. .

Therefore, the operator can access the control valves 107, 1 from the control panel 108.
07a to allow hydraulic oil to pass through the control devices 106, 106a, the hose couplings 104,1
04a.

105.1.05a can be connected.

The control device 106, 106a will thus cause the respective hose coupling 104, 104a, 105° 105a to be moved relative to each other.

At this point, hydraulic fluid is flowing from the tool carrier hydraulic system 111 to the tool carrier control valve 112, to the conduit 113,
hose couplings 105, 105a and conduit 103,
103a to the working cylinder 100° 100a, then the conduit 102, 102a, the hose coupling 104, 1
04a, can flow to hydraulic system 111 via conduit 114 and control valve 112.

An in-locking device is provided for separating the tool from its tool carrier, so that the disconnection operation of the hose coupling by the control device 106° 106a is always preceded by a mechanical cut-off operation, i.e. the locking pin 12 is moved out of the locking position. Thus, in this embodiment the operator can decide when to connect the cylinders and which of the working cylinders to connect.

A further embodiment is shown in FIG. 11, in which the connection of the hose couplings 120.degree. controlled.

When the piston rod is in its outer end position, the control cam 122 causes the check valve 123 to open.

Hydraulic oil can thus flow to an overflow valve 124 equipped with a check valve 125 , which, when opened, flows to a control device 126 for the hose couplings 120 , 121 . The hose coupling is moved together through the hose coupling.

An overflow valve 128 is also provided in the return conduit 127 from the control device 126, which is similar to valve 124 and is used when the hose coupling is shut off.

FIG. 12 shows that according to the invention it is also possible to move the two parts 201 and 202 of the hose coupling relative to each other by taking advantage of the movement of the tool carrier 203 in the direction of the tool 204. There is.

The invention is not limited only to the embodiments shown in the figures and described above, but can also be modified, varied or combined in many different ways within the scope of the claims of the invention.

[Brief explanation of the drawing]

FIG. 1 is a side view showing a tool attachment supported on a lifting arm of a loader and a tool comprising a mounting device for the attachment in a position just before they are connected to each other; FIG. 3 is an end view of the tool mounting device, FIG. 3 is a partially sectional end view of a tool attachment illustrating a first embodiment of the automatic quick coupling device according to the present invention, and FIG. 4 is an end view of the tool attachment device. Although similar to FIG. 3, FIGS. 5 and 6 are end views showing a modified embodiment of the invention; FIGS. FIG. 7 is a hydraulic wiring diagram for a quick coupling device according to the invention, and FIG. 8 is a further wiring diagram, in particular for the embodiment shown in FIGS. 5 and 6. 9 shows a hydraulic wiring diagram for a somewhat modified embodiment of the embodiment shown in FIGS. 5 and 6; FIG. 10 shows an alternative embodiment of the invention with two working cylinders; FIG. FIG. 11 is a schematic block diagram illustrating a further embodiment of the invention; FIG. 12 is a schematic block diagram illustrating a further embodiment of the invention; FIG. 12 is a schematic block diagram illustrating a further embodiment of the invention; FIG. It is a figure of a tool and a tool carrier showing a situation. 1: Tool attachment, 6: Tool, 9: Holding eye, 7
: Mounting device, 12: Lock pin, 16: Hydraulic cylinder,
15: Piston, 22, 23: Pulling rod, 29.30:
hose coupling.

Claims (1)

[Claims] 1 a tool attachment 1 supported on a carrier;
supporting the tool 6 and attaching the tool 6 to the tool attachment 1;
In the quick coupling device, the tool mounting device 7 has a fixed latch member 9, while the tool attachment 1 has a movable latch member 12. , when the tool attachment 1 and the tool mounting device 7 are engaged, the movable latch stop member 12 is moved and the fixed hook engages with the stop member 9, so that the tool attachment 1 and the tool mounting device 7 are engaged with each other. The movable hook moves the stop member 12, and the fixed hook is supported by the device 15, 16 and the tool mounting device 7 for engaging and releasing the stop member. A hydraulic circuit is provided for supplying hydraulic pressure to the tool 6, which is connected to two sets of hose couplings 29a, 30a: 29b, each consisting of two parts.
y 30 b of each hose coupling.
One of the two parts 29b; 30b is fixed to the tool mounting device 7, the other of the two parts 29a;
0a is movably attached to the tool attachment 1,
In addition, in response to the movement of the movable latch member 12 engaging and disengaging from the fixed latch member 9, the movable one of the two parts of each set of hose couplings, i.e., the other Mechanisms 20, 22 for moving parts 29a; 30a;
23, 24° 25; 23, 24, 51;
．． 12 is engaged, and when removing the tool, the mechanism is laterally arranged so that the fixed and movable latches are disengaged only after the stop members 9 and 12 are disengaged. A quick coupling characterized by the fact that