JPH0739969Y2 - Work implement mounting device - Google Patents

Description

[Detailed description of the device]

[0001]

[Industrial application] The present invention provides a bucket, a crusher, a gripper,
The present invention relates to a work implement attachment device for changing and using various work implements such as a cutting machine and a breaker according to a work purpose.

[0002]

2. Description of the Related Art Conventionally, various working tools such as a bucket, a crusher, a crusher, a grinder, a cutting machine, and a breaker are used at the tip of an arm of a self-propelled trolley such as a hydraulic excavator, depending on the work purpose. In this case, a device for efficiently changing work implements is disclosed in, for example, a work implement attaching device 60 as shown in FIG. 12, or Japanese Utility Model Publication No. 60-96464 or Japanese Utility Model Publication No. 61-169162. Such work implement attachment devices are commonly used.

In such a work equipment mounting device,
When mounting the work implement, the posture of the work implement is adjusted in advance so that the direction of the arm pin or the link pin on the work implement side matches the direction of the pin fitting recesses 61, 62 of the work implement attaching device 60 attached to the shovel truck. Must be adjusted accurately.

Further, when the above-mentioned various working tools are attached to a self-propelled trolley such as a hydraulic excavator for working, it is often necessary to change the direction of the working tools in accordance with the direction and shape of the object so as to facilitate the work. Alternatively, when lifting and moving objects, and when hoisting and lowering objects for work such as transshipment and stacking, in the case of long objects and standard objects, lift the working equipment according to the direction of the object, or align the directions. It is necessary to take it down into place.

[Problems to be solved by the device]

However, the conventional work implement attachment device cannot rotate the work implement, and in order to solve the above problem, the arm rotation of the shovel truck, the boom undulation, and the operation of the cylinder link mechanism for the bucket swing are performed. It is necessary to adjust the position and orientation of the work implement by a combination of vertical and forward / backward swings, turning of the excavator trolley, and traveling motion.It is necessary to repeat this motion frequently depending on the state of the work object. Not only is the operation of the dolly time-consuming and inefficient, but the operation of the shovel dolly also has the inconvenience of relying on the skills of an experienced and experienced operator.

As a means for rotating a work implement attached to a shovel cart, a power swing type work implement in which a swing drive device is incorporated in the work implement itself is known, but a system in which a power swing mechanism is provided for each work implement Therefore, it is the reality that non-swivel type working tools are still widely used except for specific working tools because of the high price.

[0007] Alternatively, a shovel truck having an arm rotating mechanism which is rotatable about the longitudinal axis of the arm of a hydraulic shovel has been conventionally known, but it is limited to keep the arm long and strong. However, it is only used in a limited number of excavator trucks, and its application is limited to relatively light work.

The present invention provides a bucket, a crusher, a slicing machine, a gripping machine at the arm tip of a self-propelled trolley such as a hydraulic excavator.
(EN) Provided is a work implement attachment device capable of easily replacing various work implements such as a cutting machine and a breaker and rotating the work implement according to the direction and shape of an object.

[0009]

In view of the above, the work implement mounting device according to the present invention is equipped with a bracket attachable to the tip of an arm of a self-propelled trolley such as a hydraulic excavator and a work implement such as a bucket or a crusher. In a work implement mounting device having a mountable frame, a swivel bearing is provided between the bracket and the mount frame to support the mount frame with respect to the bracket so that the mount frame can be swiveled. It is equipped with a turning drive mechanism for
The mounting frame is a series for mounting and fixing work equipment.
While having a fluid drive means such as
The drive source of the mechanism is composed of a fluid drive motor.
Attach the drive motor to the bracket, and then use the above-mentioned self-propelled stand
Working fluid supplied from the vehicle side is collected in the bracket side.
The working fluid switching means attached to the mounting frame
Switching between fluid drive means and fluid drive motor of the swing drive mechanism
It is characterized by being configured to be supplied .

[0010]

[0011]

In the work implement mounting device according to the first aspect of the present invention, when the turning drive mechanism is operated when the work implement is mounted or during various works in which the work implement is mounted, the posture and work for mounting the work implement can be achieved. The direction of the object can be easily adjusted. In addition, a fluid supply path for mounting and fixing work equipment and a swivel
It can also be used as a fluid supply path for the drive mechanism.
Therefore, the piping equipment can be simplified. And this fluid supply path
Since the change in the oil supply amount due to the change of
The operation can be secured. In addition, the working fluid switching hand
The steps are attached to the bracket side, simplifying the configuration.
You can

[0012]

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a first embodiment of the present invention will be described with reference to FIGS.
An example will be described.

FIG. 1 and FIG. 2 are views of the work implement mounting device of this embodiment seen from the side, showing a state in which a swing arm 19 swings forward and a stopper 23 is mounted, and FIG. An enlarged side view with a part cut away, and FIG. 2 is a side view. 3 is a side view showing a state in which the stopper 23 is extracted from FIG. 2 and the swing arm 19 is swung backward, and FIG. 4 is a side view in the longitudinal direction of the stopper 23.

FIG. 5 is a front view of FIG. 2, FIG. 6 shows a state in which the working implement mounting device of this embodiment is mounted on a hydraulic excavator, and FIG. 7 shows only the slewing bearing portion as seen from the arrow XX of FIG. In the figure, the meshing relationship between the rack mechanism formed on the outer periphery of the slewing bearing and the pinion at the output shaft end of the rotary drive machine is shown.

FIG. 8 is a hydraulic circuit diagram of the working implement mounting device of this embodiment, which is used for the arm swing cylinder mechanism of the working implement such as a known crusher or cutter attached to the working implement mounting device of this embodiment. Shown together with the pipe connection status.

In the work implement mounting device, the connecting pins P are respectively inserted into the pin holes 8a and 8b formed through the upper portions of the opposite side plates 8 of the bracket 1, and the boom of the hydraulic excavator S as shown in FIG. A tip end of an arm A rotatably attached to a tip end of B and a bucket rotation link mechanism L of an excavator attached near the tip end of the arm A are swingably attached in the front-rear direction.

The upper surface of the inner race 14 (FIG. 7) of the slewing bearing 5 is joined to the lower surface of the bottom plate member 3 at the lower end of the bracket 1, and a plurality of holes are formed along the inner race 14 of the slewing bearing 5. The slewing bearing 5 is fastened to the bottom plate member 3 of the bracket through the bolt hole 15 by the bolt 4.

On the other hand, on the lower surface of the outer race 11 (FIG. 7) of the slewing bearing 5, the upper plate member 7 of the mounting frame 7 is attached.
The upper surface of a is joined, penetrates a plurality of bolt holes 12 formed along the outer race 11, and the outer race 11 is fastened to the upper surface of the upper plate member 7 a of the mounting frame 7 with bolts 6.

In the slewing bearing 5, as shown in FIG. 7, uniform grooves are formed on the inner diameter portion of the outer race 11 and the outer diameter portion of the inner race 14 along the circumference, respectively, though not shown. A plurality of balls or rollers 16 are provided in the annular space surrounded by the grooves of both races 11 and 14.
Are arranged at equal intervals, and the outer race 11 and the inner race 14 are rotated by the rotation of the balls or rollers 16.
And are configured so that they can freely rotate relative to each other and that a force can be supported in the axial direction by the ball or roller 16.

Since the slewing bearing 5 having such a structure is fastened to the bottom plate member 3 of the bracket 1 and the upper plate member 7a of the mounting frame 7 with the bolts 4 and 6, as described above, the mounting frame 7 The bracket 1 and the bracket 1 can relatively rotate.

Outer race 11 of slewing bearing 5
The rack teeth 1 of the continuous rack mechanism along the outer periphery thereof.
While the bottom plate member 3 of the bracket 1 is formed on the upper surface of the position where the bottom plate member 3 of the bracket 1 projects outward from the outer diameter of the outer race 11 of the turning bare link 5, a fluid pressure driven motor 2 (hereinafter, referred to as a rotary drive Is arranged and fixed with the output shaft facing downward, and the pinion 9 attached to the output shaft end of the rotary drive machine 2 protruding downward from the bottom plate member 3 meshes with the rack tooth 13 described above to form a swing bearing. The outer race 11 of No. 5 is driven to turn.

The teeth of the rack mechanism and the pinion may be replaced by the gear transmission mechanism, which is not shown, but may be a known pin rack mechanism and teeth having a shape corresponding thereto.

The bottom plate member 3 of the bracket 1 and the upper plate member 7a of the mounting frame 7 are located at the center positions of the orbiting bearings.
Since the working fluid is supplied from the hydraulic excavator side to the arm swing cylinder mechanism 18 (which will be described later) and the working equipment housed in the mounting frame 7, a rotary joint 10 known as a fluid relay (FIG. 5). ) Is attached and a working fluid hose supplied from the hydraulic excavator trolley side is passed through a relay port (not shown) provided on the upper part of the housing 25 (FIG. 8) of the rotary joint 10 to allow the core inside the rotary joint 10 to pass through. It is relayed to a relay port (not shown) provided on the lower surface of 26 (FIG. 8), and from there, it is further connected to the arm swing cylinder mechanism 18 and the working tool by a hose.

Regarding the rotary drive 2, the fluid is oil.
It is supplied from the pressure shovel side, and the ho
Scan, together with the arm swinging cylinder mechanism 18 and the working Kigu hose disposed along the hydraulic excavator boom B and the arm A, the details of these hoses not shown. Then, their ends are connected to the rotary drive 2 and the rotary joint 10 for relay.

The terminal on the shovel side of the hose described above is connected to a control operating valve or switch (neither of which is shown) provided on the operation console C of the hydraulic shovel, and the terminal of the hydraulic excavator is connected. The driver is allowed to freely control the operation of the work implement, the operation of the arm swing cylinder mechanism 18, and the turning operation.

Further, the piping system on the hydraulic excavator side for supplying the working fluid to the rotary drive 2 and the arm swing cylinder mechanism 18 is also one system, and the bracket 1
The switching valve 24 provided on the bottom plate member 3 is relayed and divided into two systems, each of which is connected to the rotary drive 2 and the arm swing cylinder mechanism 18, respectively, and any one is selected by operating the switching valve 24. So that the working fluid can be supplied.

Next, the structure of the mounting frame 7 to which the working implement is mounted and each member housed in the frame 7 will be described mainly based on FIG.

The mounting frame 7 is a horizontal upper plate member 7a.
A pair of parallel side plates 7b vertically joined downward from the lower surface of the upper plate member 7a, and a reinforcing member 7 joined between the side plates 7b at the front and rear ends of the side plate 7b.
c, 7d, and a substantially semicircular recess 7e that opens rearward at the lower rear end of the mounting frame 7.
It is formed so as to be integrated with.

On the other hand, the swing arm 19 is formed with a substantially semi-circular recess 19a which is open forward at the tip end thereof, and a projection 19b is formed at the rear of the recess 19a and penetrates through the base end thereof. Each pin hole 19c is formed. The swing arm 19 has a recess 19a.
Is inserted between the pair of side plates 7b so as to be positioned at substantially the same level as the recess 7e at the lower rear end of the mounting frame 7, and the pin hole 19c at the base end of the swing arm 19 and the pair of side plates 7b are provided. An engagement pin 20 is attached to the penetratingly formed pin hole, and a swing arm 19 is pivotally attached so as to be swingable back and forth. In addition, the rear protrusion 19 of the swing arm 19
An arm swing cylinder mechanism 18 that expands and contracts by fluid pressure and swings the swing arm 19 back and forth is pivotally attached by a pin support mechanism between b and the inner surface of the reinforcing member 7d at the rear end of the mounting frame 7.

A notch (not shown) is provided at the tip of the engaging pin 20, and as shown in FIGS. 2 and 3, a retaining member 21 is attached to the notch so that one frame side plate 7b.
It is locked with a bolt 22.

Further, a stopper 23 having a rectangular cross section is attached to a rectangular insertion hole 7f having a recess notch at each corner formed through each of the pair of side plates 7b. By attaching the stopper 23, the cylinder mechanism 18 is moved forward. The upper edge 19e of the rear protrusion 19b of the swing arm 19 which is swung
Is brought into contact with the stopper 23 to restrict the swing arm 19 from swinging back and returning.

The circuit relationship between the working fluid supplied from the hydraulic excavator side and the piping system in the working implement mounting device of the present invention and the working implement will be described below with reference to FIG. From the hydraulic excavator side, for turning drive of the work implement attachment device of the present invention
A primary side piping system of D1 is prepared for the rotation drive motor 2 and the arm swing cylinder mechanism 18, and a piping system of A1 is used for driving the working tool.

Of these, the working tool drive piping system A1 is first connected directly to the actuator G of the working tool through the piping system A2 by relaying the core 25 from the housing 25 of the rotary joint 10.

On the other hand, the piping system D1 for the rotary drive motor 2 and the arm swing cylinder mechanism 18 is connected to the circuit switching valve 24, and the secondary side of this switching valve 24 is connected to the piping system DM of the rotary driving motor 2. , And the pipe system DC of the arm swing cylinder mechanism 18, respectively, and the working fluid is switched to and supplied to either one. With the circuit configuration and the piping system as described above, all controls can be performed from the operation console C of the hydraulic excavator. This switching valve 2
Although various types such as a manually operated type, a hydraulic pilot type, and an electromagnetic type can be used as the unit 4, the point is that it can be controlled from the shovel cab.

When the working implement mounting device configured as described above is used by being attached to the tip of the arm A of a truck such as a hydraulic excavator, first, the direction of the arm pin of the target working implement placed on the ground and the working implement A recess 19a formed in front of the swing arm 19 of the work implement attachment device and facing a recess 7e formed in the rear end of the attachment frame 7 of the attachment device is located on the same side as the link pin of the work implement. The rotation drive machine 2 of the work implement attachment device is rotated until it comes to do so.

When performing this work, the stopper 23 of the work implement mounting device is pulled out in advance, the piston of the arm swing cylinder mechanism 18 is pulled in, and the swing arm 1 is pulled out.
Swing 9 backwards and pull in.

Next, the hydraulic excavator trolley is operated so that the arm pin of the work implement is attached to the attachment frame 7 of the work implement attaching device.
It is hooked on the recess 7e formed at the rear end, and pushed in until the arm pin hits the bottom of the recess 7e, and further the tip of the swing arm 19 of the working tool is inserted in front of the link pin (arm pin side) of the working tool. Then, the piston of the arm swing cylinder mechanism 18 is extended to swing the swing arm 19 forward and pushed out until the bottom of the recess 19a formed in front of the swing arm 19 abuts on the link pin.

At the stage where the above procedure is completed, the recess 19a provided at the front of the swing arm 19 and the recess 7e provided at the rear end of the mounting frame 7 cause the link pin and the arm pin of the working tool to come into contact with each other. It is stretched by the arm swing cylinder mechanism 18 so as to push back and forth.

Then, the stopper 23 is inserted through the insertion hole 7f penetratingly formed in the side plate 7b of the mounting frame 7, and the stopper 23 is brought into contact with the protrusion 19e formed on the rear side of the swing arm 19, so that the swing arm 19 moves rearward. The return swing of the swing arm 19 is regulated so that the working tool does not come off while swinging to, thereby completing the attachment of the working tool.

If there is a difference in the inner distance between the arm pin and the link pin of the working tool depending on the model of the working tool,
If the swing angles of the swing arm 19 toward the front are different when mounting the work implement, the stoppers 23 having different heights should be used so that the swing arm 19 can be accurately locked corresponding to each work implement. , Or use together with a spacer.

Finally, the working fluid hose of the working tool is connected to the relay port below the core 26 of the fluid relay rotary joint 10.

After the work implement has been attached to the hydraulic excavator trolley via the work implement attachment device of the present invention, the excavator trolley is operated to move the work implement to the target work object, and the work implement is moved according to the purpose of the work implement. It is possible to perform the required work.

If it is necessary to change the direction of the work implement according to the shape and direction of the work object, or particularly if the work implement is a grasper or a cutter, the target is grasped or bitten. In doing so, it is necessary to align the working tool with the direction of the object each time, but in such a case, by driving the rotary drive 2 for rotation of the working tool mounting device, the entire working tool is moved. It rotates so that it can easily be oriented in the desired direction.

When the rotary drive 2 and the arm swing cylinder mechanism 18 share the working fluid pipe supplied from the shovel trolley side, the switching valve 24 mounted on the bracket is used to connect the motor 2 side and the cylinder mechanism 18. Switching to the side can be easily done with one-touch operation. The switching valve 24 is switched to the arm swing cylinder mechanism 18 side when the work implement is attached and detached, and is switched to the rotary drive 2 side when the normal work is performed. And
Since the change in the amount of oil supplied during this change is small
It is possible to secure the desired operation. Furthermore, the switching valve 24
Since it is mounted on the bracket 1 side, inside the mounting frame 7
The piping etc. can be simplified.

Next, another embodiment of the present invention will be described with reference to FIGS.
It will be described based on 1.

First, FIG. 9 shows a method of driving the inner race by arranging the position of the pinion at the output shaft end of the rotary drive machine inside the slewing bearing opposite to that of FIG. The teeth of the rack mechanism are not provided, the teeth 33 of the inscribed rack mechanism are formed inside the inner race 32, and the teeth 35 of the pinion 34 attached to the output shaft end of the rotary drive are meshed with the teeth 33 to rotate. The inner race 32 of the bearing is driven to rotate. In the case of this embodiment, the upper plate member 7a of the mounting frame 7 shown in FIG.
The bottom plate member 3 of the bracket shown in FIG. 2 is fastened to the inner race 32 side by bolts to the outer race 31 side.

As in the case of the above-described embodiment, the rack mechanism and the pinion teeth in this embodiment also have a well-known pin rack mechanism and a corresponding shape (not shown) instead of the gear transmission mechanism. You can use teeth.

The embodiment of FIG. 10 shows an example in which the pinion 9 of the rotary drive machine and the rack mechanism 13 of the slewing bearing of FIG. 7 are changed to a chain winding transmission system. The outer race 42 has a sprocket tooth for the chain 41. 43, and a chain sprocket 44 attached to the output shaft end of the rotary drive having a shape corresponding to this is arranged at an appropriately separated position so as not to interfere with the sprocket teeth 43 of the outer race. The outer race 42 is driven by winding the chain 41 between the sprocket teeth 45 and the sprocket teeth 43 of the outer race 42. In the case of this embodiment, the upper plate member 7a of the mounting frame 7 shown in FIG. 2 is fastened to the outer race 42 side, and the bracket bottom plate member 3 shown in FIG. 2 is fastened to the inner race 46 side by bolts. .

The embodiment of FIG. 11 shows an example in which the sprocket teeth of the outer race in the embodiment of FIG. 10 are eliminated, and the outer race 52 of the slewing bearing has no sprocket teeth and both ends of the chain 51 separated at one place. The parts 56a and 56b are connected and locked to a chain holding member 57 fixed to an appropriate position on the outer circumference of the outer race 52, and the chain 51 is wound around the outer race 52 while being in contact with the outer circumference of the outer race 52. The outer race is swiveled by being wound around the sprocket teeth 55 of the chain sprocket 54 attached to the output shaft end of the rotary drive arranged at.

[0051]

As described above, by using the work implement attachment device of claim 1, various work implements can be easily attached to and detached from a truck such as a hydraulic excavator. It is not necessary to adjust the direction and posture of the work implement arm pin or link pin so that it is on the ground so that it matches the direction of the work implement attachment device, and the work implement orientation is adjusted according to the direction of the work object. In such a case, conventionally, it was necessary to rely only on the operation of the shovel cart, but in the device of the present invention, the excavator operation can be reduced by driving the turning drive device, and this object can be easily achieved.

By using the device of the present invention,
Even with the conventional inexpensive non-swivel type work implement, the work efficiency can be increased to the same level as the case where the expensive work implement with the swivel drive is used, which can contribute to a significant cost reduction.

Further, working fluid switching means is provided.
Therefore, it is sufficient to provide one system for the pressure fluid supplied from the shovel cart side or the like in common for the rotary drive and the cylinder mechanism, and one system can be omitted, which simplifies the configuration. Then, by the working fluid switching means
When changing the fluid supply path, the change in the amount of oil supplied is small.
Therefore, stable operation can be secured.
The working fluid switching means is attached to the bracket side.
Therefore, the configuration can be simplified.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of an embodiment of a work implement attachment device of the present invention.

FIG. 2 is a side view of an embodiment of the work implement attachment device of the present invention.

FIG. 3 is a side view showing a state where the arm swings backward in FIG.

FIG. 4 is a side view of the stopper used in the above.

FIG. 5 is a front view of the apparatus of the above embodiment.

FIG. 6 is a schematic configuration diagram showing a state in which the device of the above-described embodiment is attached to a hydraulic excavator, and illustrations of cables, a part of hoses, and working tools are omitted.

7 is a plan view of only the slewing bearing portion taken along the line XX in FIG. 5, showing a state in which the pinion and the teeth of the rack mechanism formed on the outer race of the bearing are in mesh with each other.

FIG. 8 is a hydraulic circuit diagram of the apparatus of the above embodiment.

FIG. 9 is a plan view of the same portion as FIG. 7 when a rack mechanism is formed on the inner race of the slewing bearing according to another embodiment of the present invention.

10 is a plan view of the same portion as FIG. 7 in the case of chain drive, showing another embodiment of the present invention.

11 is a plan view showing another embodiment of the present invention, and FIG.
It is a modified example of.

FIG. 12 is a side view of a conventional work implement attachment device.

[Explanation of symbols]

 1 bracket 2 rotary drive 3 bottom plate member 5 revolving bearing 7 mounting frame 7a upper plate member 7b frame side plate 7e frame lower rear end recess 9 pinion 13 rack tooth 18 arm swing cylinder mechanism 19 swing arm 19a arm front recess 23 stopper 24 switching valve

Claims (1)

[Scope of utility model registration request] 1. A work implement attachment device comprising a bracket attachable to the tip of an arm of a self-propelled trolley such as a hydraulic excavator, and a mounting frame to which a work implement such as a bucket or a crusher can be attached. and interposed a swivel bearing between the bracket and the mounting frame pivotably supporting the mounting frame relative to the bracket, made by providing a swivel drive mechanism for further pivoting drive the mounting frame, the
The mounting frame is a series for mounting and fixing work equipment.
While having a fluid drive means such as
The drive source of the mechanism is composed of a fluid drive motor.
Attach the drive motor to the bracket, and then use the above-mentioned self-propelled stand
Working fluid supplied from the vehicle side is collected in the bracket side.
The working fluid switching means attached to the mounting frame
Switching between fluid drive means and fluid drive motor of the swing drive mechanism
A work implement attachment device characterized by being configured to be supplied .