JP3452089B2 - Work machine vehicle joint demounting device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic system joint attaching / detaching device for a working machine vehicle in which a working machine for carrying out cargo work by hydraulic pressure is detachably mounted on the vehicle.

[0002]

2. Description of the Related Art A work machine (loader) which is mounted on a vehicle such as a tractor and which is operated by hydraulic pressure from a hydraulic pump driven by an engine of the vehicle is removably pin-coupled to the vehicle so that both the vehicle and the work machine are connected. A hydraulic system is detachably connected by a male and female joint. A hydraulic device 50 as shown in FIGS. 7 and 8 is used as a device for detachably connecting a hydraulic system of a vehicle and a working machine.

In FIG. 7, a hydraulic device 50 is fixed to a mast cradle 3 of a work machine mounting portion fixed near the cockpit of the vehicle 1, and the work machine 2 is detachably coupled to the mast cradle 3 by a pin. . The work machine 2 is, for example, one in which a bucket 5 is connected to the tip of a swing arm 4, and includes a swing cylinder 4 and a hydraulic cylinder 6 for rotating the bucket 5, and a mast 8 at a base end portion of the swing arm 4 is provided. A mast cradle 3 of the vehicle 1 is detachably pin-coupled. The four hydraulic hoses 7 connected to the hydraulic cylinders 6 of the work machine 2 are detachably connected to the hydraulic device 50.

A hydraulic system 50 shown in FIG. 8 is constructed by attaching four vehicle side joints 52 to a directional control valve 51 fixed to a mast cradle 3 of a vehicle 1. The directional control valve 51 is
In a substantially rectangular box with an oil passage through which hydraulic oil passes,
Oil holes 54, which are the entrances and exits of the oil passages, are provided at four positions on the front, the bottom, the left, and the right on the front surface opposite to the mast cradle 3. The vehicle side joint 52 is screwed and fixed to each oil hole 54. The directions of the four vehicle-side joints 52 are aligned so that the tip portions thereof face the same direction. Further, a stop valve 55 is connected between the oil hole 54 of a part of the oil passage and the joint 52 thereof.

The vehicle-side joint 52 forms a male-female pair with the working-machine-side joint 53 connected to the tip of each hydraulic hose 7 of the working machine 2, and the working-machine-side joint 53 corresponding to the vehicle-side joint 52. Detachment is done manually with one touch. When removing the working machine 2 from the vehicle 1, the working machine side joint 53 is sequentially removed manually from each vehicle side joint 52 of the hydraulic device 50, and the mast 6 is removed from the mast cradle 3. When the work implement 2 is mounted on the vehicle 1, the mast 6 is pin-joined to the mast cradle 3
The working machine side joint 53 of each hydraulic hose 7 is manually connected in sequence to the vehicle side joint 52 of the hydraulic device 50. By bringing the vehicle-side joints 52 of the hydraulic device 50 close to each other and aligning the directions of the respective tip portions in the same direction, a plurality of vehicle-side joints 52 are provided.
The work machine side joint 53 is designed to be easily attached and detached.

[0006]

The work of manually attaching and detaching the working machine side joints at the ends of the plurality of hydraulic hoses of the working machine to each of the plurality of vehicle side joints fixed to the vehicle as described above. Had a lot of man-hours and poor workability, and there was a problem that the hands were soiled with oil when the joint was attached and detached. Furthermore, when the working machine side joint is removed from the vehicle side joint, the multiple hydraulic hoses of the working machine are disjointed, and their handling becomes troublesome,
Also, when connecting the working machine side joint of the disassembled hydraulic hose to the vehicle side joint, there may be an error in connecting the working machine side joint to the wrong vehicle side joint. Needed

Further, a female type joint is used for either the vehicle side joint or the working machine side joint, and foreign matter such as earth and sand enters the opening into which the male type joint of this female joint is inserted, Special care must be taken when handling the female joint, as this may make it difficult to attach and detach it from the male joint, and may cause poor connection with the male joint.

An object of the present invention is to provide a joint attachment / detachment device for a working machine vehicle, which has improved workability for joint attachment / detachment.

[0009]

SUMMARY OF THE INVENTION The present invention relates to a hydraulic system between a vehicle and a working machine in a working machine vehicle in which a working machine detachably attached to the vehicle is driven by hydraulic pressure from a hydraulic drive system of the vehicle. A joint attachment / detachment device, which is a vehicle-side attachment / detachment unit having a lever support fixed near a plurality of vehicle-side joints fixed in the same direction to a work implement mounting portion of a vehicle, and a plurality of hydraulic hoses for a work implement. And a hose connecting body for connecting and fixing a plurality of working machine side joints connected to the tip end of the vehicle body joint in the same arrangement as a plurality of vehicle side joints, and a rotatably connected one end portion of the hose connecting body. The work machine side attachment / detachment portion is detachably locked to the lever support body and has an operation lever that swings in a direction in which the work machine side joint is attached / detached to / from the corresponding vehicle side joint about a locking point with the lever support body as a fulcrum. The joint on the vehicle side and the joint on the work implement side It is inserted into the Inijiku direction, characterized in that using the joint which is connected to the one-touch.

Further, according to the present invention, the plurality of vehicle side joints are axially moved by fitting and inserting the corresponding working machine side joints, and are axially returned by a built-in spring to lock both joints. And a structure for attaching a lock release mechanism for unlocking the joints by collectively moving the automatic locking means of the plurality of vehicle joints in the axial direction at the vehicle side attaching / detaching portion.

Further, according to the present invention, the plurality of vehicle-side joints are female and have openings into which male-type working machine side joints are fitted,
The vehicle-side attachment / detachment part is characterized in that a cover is attached to cover the openings of the plurality of vehicle-side joints when the working-machine-side joint is detached from the vehicle-side joint.

[0012]

[Operation] When the operating lever of the hose connector of the working machine is locked to the lever support of the vehicle and rocked by hand, the joints on the working machine side of the plurality of hydraulic hoses of the working machine are collectively When connected to the corresponding vehicle-side joint, and conversely, when the release lever is rocked by hand, the multiple working-machine-side joints are collectively released from the multiple vehicle-side joints, and multiple joints are removed once. Performed manually. In this joint attachment / detachment work, the operator does not have to touch the joint with his / her hands, and the hands are not soiled with oil. Further, when the working machine side joint is disengaged from the vehicle side joint, the plurality of hydraulic hoses are connected by the hose connecting body and do not come apart.

Further, by using male-female type joints with automatic locking means for the vehicle side joint and the working machine side joint, the lock of the joint attaching / detaching device when the vehicle side joint and the working machine side joint are connected individually The locking means of the joint ensures that no special locking means is required for the joint attaching / detaching device itself.

Further, when the vehicle-side joint is a female-type joint and the male-type working machine-side joint is detached from this female-type vehicle-side joint, the male-type working-machine-side joint of the female type vehicle-side joint is fitted. By covering the opening to be worn with the cover, invasion of earth and sand into the opening of the female joint is prevented.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described below with reference to FIGS. Note that the same or corresponding portions are denoted by the same reference symbols throughout the drawings including FIG. 7 and FIG. 8 to avoid duplication of description.

FIG. 1 shows a state in which the working machine 2 is separated from the vehicle 1. The vehicle-side attaching / detaching portion 31 of the joint attaching / detaching device 30 is attached to the hydraulic device 10 installed in the vehicle 1.
The working machine side attachment / detachment portion 32 of the joint attachment / detachment device 30 is attached to the tip ends of the plurality of hydraulic hoses 7. Before describing the joint attaching / detaching device 30, a specific example of the hydraulic device 10 will be described.

The hydraulic system 10 is provided with a box-shaped directional control valve 11 whose rear is fixed to the mast cradle 3 of the vehicle 1 and a stop valve built-in manifold 15 which is detachably fixed to the front surface of the directional control valve 11. . As shown in FIG. 2, the directional control valve 11 has oil holes 12 at a plurality of positions on the front surface, for example, four positions at the top, bottom, left and right. The arrangement of the oil holes 12 is the same as the arrangement of the oil holes of the directional control valve of FIG.
Is used to fix the manifold 15 with bolts 13.

The manifold 15 has four oil passages 16 inside.
And a hydraulic port at one end of each oil passage 16 has a directional control valve 1
The hydraulic port 17 communicated with the corresponding oil hole 12 of No. 1 and the hydraulic ports 17 at the other ends are aligned in the same direction. The hydraulic ports 17 of the four oil passages 16 are formed, for example, in a horizontal row in the upper surface of the manifold 15 with their directions aligned upward, and one vehicle-side joint 20 is screwed into each of the hydraulic ports 17. The four vehicle-side joints 20 are straight pipes of the same type, and are attached to the upper surface of the manifold 15 in a horizontal row at the same height.

A stop valve 18 is built in one of the oil passages 16 of the manifold 15. Only the valve opening / closing operation portion 18 ′ of the stop valve 18 projects to the front surface of the manifold 15. A part of the oil passage 16 built in the manifold 15 is used as a curved pipe joint, and a stop valve 18 is built in the manifold 15, so that the manifold 15
The external appearance is clean and the entire hydraulic device 10 is compact and has a good external appearance.

Incidentally, each hydraulic port 17 of the manifold 15
The mounting directions of the four vehicle-side joints 20 connected thereto are not limited to the upward direction, and the mounting heights of the vehicle-side joints 20 are not limited to the same, but the upward direction is the same. It is desirable to improve the attachment / detachment work of the vehicle side joint 20 and the working machine side joint 21 using the joint attaching / detaching device 30 described later.

The four bolts 13 for fixing the manifold 15 to the directional control valve 11 have slot holes 14 as shown in FIG. 3 in the axial direction and the radial direction, which penetrate the oil passage 16 of the manifold 15. The oil hole 12 and the oil passage 16 are communicated with each other by the groove hole 14 by screwing the oil hole 12 of the directional control valve 11 into the oil hole 12. By attaching the manifold 15 to the directional control valve 11 with such bolts 13, the oil passage 1 of the manifold 15
Areas other than 6 can be reduced, and the manifold 15 can be made compact and compact. Furthermore, there is an advantage that it can be easily applied to existing valves.

In the four vehicle-side joints 20 of the hydraulic system 10,
The working machine side joint 21 connected to the tips of the four hydraulic hoses 7 of the working machine 2 is detachably connected. Vehicle side joint 20
As the working machine side joint 21, a joint with an automatic lock means is used which is a male-female type pair and which is detached in a one-touch manner. Specifically, as shown in FIG. 5, a female type is used for the vehicle side joint 20, a male type is used for the work machine side joint 21, and an automatic locking means, for example, in the axial direction, is attached to the female type vehicle side joint 20. A lock ring 22 that moves back and forth is attached. When the male working machine side joint 21 is pushed into the female type vehicle side joint 20, the lock ring 22 of the vehicle side joint 20 is once lowered and both joints 20,
21 is connected, and thereafter, the lock ring 22 is automatically locked by a built-in spring (not shown) so as to move up to its original position so that the working machine side joint 21 does not come off. The next joint attachment / detachment device 30 collectively detaches and attaches the four work machine side joints 21 corresponding to the four vehicle side joints 20. If the coupling attaching / detaching device 30 is provided with the locking means for locking the operation at the connecting position, the four lock rings 22 are not always necessary. In addition, lock ring 22
Even if the hydraulic hoses 7 are not provided in all the hydraulic hoses 7 but only in the two hydraulic hoses 7 at both ends, substantially the same effect as when they are provided in all the four hydraulic hoses 7 can be obtained.

The vehicle side attaching / detaching portion 31 of the joint attaching / detaching device 30 is
A pair of left and right lever supports 33 whose lower ends are fixed to the both sides of the manifold 15 with screws 34, a lock release mechanism 35 mounted on the upper parts of the pair of lever supports 33, and a cover 36 are provided. Work machine side attachment / detachment portion 32 of the joint attachment / detachment device 30
Is a hose connector 42 that connects the ends of the four hydraulic hoses 7 in parallel in a horizontal row, and a pair of left and right operation levers 4 that are rotatably connected to both ends of the hose connector 42 by pivots 43.
4 is provided. The pair of operation levers 44 are integrated by a handle 45 fixed between the tip ends on the opposite side of the pivot 43.

The pair of left and right lever supports 33 of the vehicle side attachment / detachment portion 31 are V-shaped flat plates and extend rearward and upward from both side surfaces of the manifold 15, and pins 37 project from the upper ends thereof. The lock release mechanism 35 includes a pair of left and right lever supports 3
A ring pressing body 39 that extends forward from a support shaft 38 having both ends rotatably connected to the upper portion of 3, and a lock release lever 40 having an upper end fixed to the support shaft 38 are provided. The lock release lever 40 is vertically attached to the outer surface of the upper portion of the one lever support 33. A spring member 41 mounted between the lock release lever 40 and the lever support 33 constantly applies a rotational force to the lock release lever 40 in the clockwise direction in FIG.

The lock release lever 40 in FIG. 4 is in a normal position, and the ring pressing body 39 at this time has a tip portion of 4
It is in a normal position where it abuts the upper end of the lock ring 22 of each vehicle-side joint 20. When the lock release lever 40 is manually rotated in the counterclockwise direction in FIG. 4 against the spring force of the spring member 41, the ring pressing body 39 rotates downward as shown by the solid line and the chain line in FIG. Lock ring 2 of each vehicle side joint 20
2 is pushed down all at once, and the locks of the working machine side joints 21 are released all together.

A base end portion of the cover 36 is rotatably connected back and forth with a pin 37 as a fulcrum between upper end portions of the pair of left and right lever supports 33. The cover 36 has a flat plate-shaped main body portion 36a and a front plate portion 36b bent at a substantially right angle from the tip thereof,
Between the cover 36 and the lever support 33, a spring member (not shown) that constantly applies a rotational force that rotates the cover 36 forward is attached. In the state shown in FIG. 3 in which the working machine side joint 21 is connected to each vehicle side joint 20, the cover 36 is held at a position where the front end of the front plate portion 36b abuts the hydraulic hose 7. When the work implement side joint 21 is separated from each vehicle side joint 20, as shown in FIG. 6, the cover 36 is rotated forward and the main body portion 36 a is held at a position covering the upper end opening of each vehicle side joint 20. It

The hose connector 42 of the work machine side detachable portion 32
Is a U-shaped flat plate that connects the four working machine side joints 21 in a horizontal row at the same height as the vehicle side joints 20 on the hydraulic device 10 side with the same arrangement pitch. The pair of left and right operation levers 44, which are rotatably connected to the both ends of the hose connecting body 42 by the pivots 43, are substantially S-shaped flat plates and have a notch 46 at the tip end opposite to the handle 45. The notch 46 is a deep groove having a width into which the pin 37 of the lever support 33 is inserted, and the notch 46
By inserting the pin 37 into and engaging with the operation lever 4,
4 is detachably connected to the lever support 33.

The joint attaching / detaching device 30 is manually operated as follows.

The solid lines in FIGS. 2 to 4 show the state in which the working machine side joints 21 corresponding to the four vehicle side joints 20 are connected. At this time, the pin 37 of the lever support 33 is fitted into the notch 46 of the operating lever 44, and the operating lever 4
4 is held at a fixed position in which it is rotationally moved from the position indicated by the chain line in FIGS. Further, since the working machine side joint 21 is connected to each vehicle side joint 20 and is locked by the lock ring 22, the vehicle side joint 20 and the working machine side joint 21 unless the lock release lever 40 is rotated.
Is maintained, and the vehicle side attaching / detaching portion 3 of the joint attaching / detaching device 30.
The connection state between 1 and the work machine side attachment / detachment section 32 is maintained. In this way, by using the lock mechanism of the vehicle-side joint 20 and the working-machine-side joint 21 for locking when the vehicle-side desorption part 31 and the work-machine-side desorption part 32 of the joint desorption device 30 are connected, There is no need to provide special locking means in the.
Further, by locking the individual vehicle-side joint 20 and the working-machine-side joint 21, the locking between the vehicle-side detachable portion 31 and the working-machine-side detachable portion 32 of the joint attaching / detaching device 30 is firmly and reliably performed.

From the four vehicle side joints 20 to the working machine side joint 2
In the case of disengaging 1, the lock release lever 40 is first rotated with one hand in the counterclockwise direction in FIG. 3, and the lock ring 22 of each vehicle side joint 20 is pushed down together by the ring pressing body 39, so that the vehicle Side joint 20 and working machine side joint 21
Unlock and put. Next, the handle 45 is held with the other hand, and the operation lever 44 is rotated upward from the solid line position in FIG. 4 to the chain line position with the pin 37 of the lever support 33 as a fulcrum. When the operation lever 44 rotates upward with the pin 37 as a fulcrum, the pivot shaft 43 above the operation lever 44 moves the hose connecting body 4
2 of each vehicle side joint 20 in the unlocked state
From each of the four working machine side joints 21 are simultaneously extracted.

When the operating lever 44 is rotationally moved to the position shown by the chain line in FIG. 4 and the working machine side joint 21 is separated from the all-vehicle side joint 20, the operating lever 44 is retracted in the lengthwise direction of the notch 46 to form the notch. The pin 37 is pulled out from 46. The state at this time is shown by the solid line in FIG. 5 and the chain line in FIG. The tips of the four hydraulic hoses 7 of the working machine 2 are connected to the hose connecting body 42.
Since the hydraulic hoses 7 are connected and fixed in a horizontal row, the hydraulic hoses 7 do not come apart and the handling becomes convenient.

When the joint shown in FIG. 6 is in the detached state, the cover 36 is rotated forward by the spring force of the built-in spring material to cover the upper end opening of the female type vehicle side joint 20, and the upper end opening of the vehicle side joint 20. Prevent foreign matter such as earth and sand and dust from entering the outside.

When the four working machine side joints 21 are connected to the corresponding vehicle side joints 20, the procedure is as follows. The cover 36 is pushed upward from the upper end opening of the vehicle side joint 20 with one hand, and the notch 46 of the operation lever 44 of the working machine side detachable portion 32 at the tip of the hydraulic hose 7 is inserted into the pin 3 of the lever support 33.
7 and put the cover 36 on the back side of the hydraulic hose 7 so as to abut. The notch 46 is locked to the pin 37, the working machine side joint 21 is positioned directly above the vehicle side joint 20, and the operating lever 44 is rotated downward with the pin 37 as a fulcrum, so that four working machine side joints are provided. 21 are pushed together into the corresponding vehicle side joint 20. The vehicle-side joint 2 by the pushing force of the working-machine-side joint 21
The lock ring 22 of 0 is once lowered, and both joints 20 and 21
When they are connected, the lock ring 22 springs up by the spring force of the built-in spring material, and the joints 20 and 21 are locked.

In such a joint joint attachment / detachment work, since the four work machine side joints 21 are connected by the hose connecting body 42, the positions of the vehicle side joint 20 corresponding to the four work machine side joints 21. The relationship is always constant, both joints 20,
There is no connection error between 21. In addition, since the worker does not directly touch the vehicle-side joint 20 or the working-machine-side joint 21 in the joint attaching / detaching work, there is no concern that the hand is soiled with oil.

The present invention is not limited to the joint attaching / detaching device installed between the hydraulic device in which the manifold is attached to the directional control valve and the working machine as in the above-described embodiment. It may be a joint attachment / detachment device attached to the hydraulic device.

Further, according to the present invention, an operating lever for performing a joint attaching / detaching operation is attached to the working machine side. The reason is that if this kind of operation lever is attached to the vehicle side, the operation lever on the vehicle side becomes an obstacle to work such as traveling of the vehicle after the working machine is separated.

[0037]

According to the present invention, a plurality of vehicle side joints and a plurality of hydraulic hose joints on the working machine side of the working machine can be provided by simply swinging the operating lever of the working machine side hose connector manually. Since the attachment and detachment are performed at once, the workability of attaching and detaching the joint between the vehicle and the working machine is significantly improved. Further, since the worker does not have to touch the joint during the joint attaching / detaching work, his / her hands are not contaminated with oil during the joint attaching / detaching work, and extra post-treatment work such as oil wiping after the work is eliminated. Furthermore, when the working machine side joint is detached from the vehicle side joint, the multiple hydraulic hoses of the working machine are connected by the hose connection body and do not fall apart. Becomes convenient.

Further, by using male-female type joints with automatic locking means for the vehicle side joint and the working machine side joint, a plurality of vehicle side joints and working machine side joints are individually locked and connected, so that stable It is possible to provide the joint attaching / detaching device having a strong locking function, and the joint attaching / detaching device itself does not require any special locking means, so that the joint attaching / detaching device can be simplified.

Further, when the male working machine side joint is detached from the female vehicle side joint, the opening of the female vehicle side joint to which the male working machine side joint is fitted is covered with a cover. By doing so, the cover prevents the intrusion of earth and sand into the opening of the female joint, saves the labor of cleaning the female joint, and reduces detachment defects of the male and female joints.

[Brief description of drawings]

FIG. 1 is a side view of a vehicle equipped with a joint attaching / detaching device according to an embodiment of the present invention and a working machine when the working machine is detached.

FIG. 2 is an enlarged front view of the joint attaching / detaching device of FIG. 1 when the joint is connected.

FIG. 3 is a sectional view taken along the line AA of FIG.

FIG. 4 is a side view of the joint attaching / detaching device of FIG.

5 is a front view of the joint attaching / detaching device of FIG. 2 when the joint is detached.

6 is a partial side view including a partial cross section of the joint attaching / detaching device of FIG. 5 when the joint is detached.

FIG. 7 is a side view of a main part of the working machine vehicle.

8 is an enlarged front view of a joint portion of the working machine vehicle of FIG. 7.

[Explanation of symbols]

1 vehicle 2 working machines 7 hydraulic hose 20 Vehicle side joint 21 Working machine side joint 22 Automatic locking means (lock ring) 30 Joint desorption device 31 Vehicle side removable part 32 Work machine side removable part 33 Lever support 35 Lock release mechanism 36 cover 42 hose connection 44 Operation lever

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI F16L 39/00 F16L 39/00 (56) References JP-A-4-80434 (JP, A) JP-A-6-109187 (JP , A) Furukaihei 4-32387 (JP, U) Furukaihei 6-54688 (JP, U) Furukaisho 63-189354 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB) Name) E02F 9/00 A01B 63/10 B25J 19/00 B66F 9/065 B66F 9/08 F16L 39/00

Claims (3)

(57) [Claims] 1. A joint attachment / detachment device for a hydraulic system between a working machine and a working machine in a working machine vehicle, wherein a working machine detachably attached to the vehicle is driven by hydraulic pressure from a hydraulic drive system of the vehicle. The vehicle-side attachment / detachment portion having a lever support member fixed in the vicinity of a plurality of vehicle-side joints fixed in the same direction to the working-machine mounting portion, and a plurality of hydraulic hose end portions coupled to the working machine. A hose connecting body for connecting and fixing the working machine side joints to each other in the same arrangement as the plurality of vehicle side joints, and rotatably connected to the hose connecting body, and one end of which is detachably locked to the lever support body. And a working machine side attaching / detaching portion having an operating lever that swings in a direction for attaching / detaching the working machine side joint to / from the corresponding vehicle side joint with a locking point with the lever support as a fulcrum, and the vehicle side The joint and the joint on the work implement side are in the axial direction. Fitted interpolated by fitting detaching apparatus for a working machine vehicle is joint connected to one touch. 2. The vehicle is provided with an automatic locking means for axially moving by fitting and inserting the corresponding working machine side joint and returning to the axial direction by a built-in spring to lock both joints. 2. The joint attachment / detachment device for a working machine vehicle according to claim 1, wherein the side attachment / detachment portion is provided with a lock release mechanism for axially collectively moving the automatic lock means of the plurality of vehicle side joints to release the lock between the joints. .. 3. The plurality of vehicle-side joints are female joints and have an opening into which a male work-machine-side joint is fitted, and the work-machine-side joint is separated from the vehicle-side joint at the vehicle-side attachment / detachment portion. The joint attachment / detachment device for a working machine vehicle according to claim 1 or 2, further comprising a cover for covering the openings of the plurality of female vehicle side joints when the cover is attached.