JPH0315637Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an attachment/detachment device for a hydraulic excavator.

Hydraulic excavators sometimes change attachments depending on the work situation to achieve the most efficient work. To replace such an attachment, it is normal to remove the pin between the attachment and the bracket to which it is attached, install another attachment, and insert the pin between that attachment and the bracket. .
This attachment replacement method is difficult to operate because the pin holes of the bracket and attachment must be aligned, and it is difficult for an operator to easily perform it by himself.

This idea improves the above points and allows the worker to
The purpose is to allow people to easily replace attachments.

The structure of this invention has a box-shaped main body with a bracket on the top, a guide plate fixed to the upper part of the inside, and long hole-shaped notches bent at right angles in two places on the left and right sides of the body. A box-shaped slide body is housed inside the main body so that its upper surface is in contact with the guide, and has a box-shaped slide body having two notches in the front and back on both left and right sides, and an inclined surface that slides on the slope of the rear shoulder of the slide body. death,
It consists of a stopper that is inserted between the slide body and the main body to stop the movement of the slide body, a lever that moves the stopper according to the movement of the slide body, and a play prevention plate that presses against the shaft of the bucket.

Just by aligning the notch on the body with the pin on the bucket and pushing it in, and moving the body slightly backwards, the slide body will move and the stopper will automatically lower and lock the pin, so only one worker can attach it. can be exchanged.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Reference numeral 1 denotes the main body of the bucket gripping machine, which is formed into a box shape with the rear part of the upper part slightly bulging upwards, and a bracket 4 for connecting to the arm 2 and push rod 3 of the hydraulic excavator is fixed to the upper part. A guide plate 5 is fixed to. Further, the lower ends of the left and right sides of the main body 1 are curved to fit the upper edges of the bucket bag 9 attached to the main body 1, and form a box-shaped cross section with the lower member 7. Reference numeral 8 denotes long hole-shaped notches that are bored at two locations in the front and back at the bottom of the left and right sides of the main body 1, into which pins 10 are inserted when attaching the bucket belt 9. It's crooked. Reference numeral 11 denotes a slide box, which is formed into a box shape with an open lower part, and its lower ends on both left and right sides are curved in the same way as the lower ends on both sides of the main body 1, and the slide box is placed on the lower member 7 of the main body 1 at this part. and is inserted into the main body 1 with the upper part in contact with the guide plate 5 of the main body 1. Below the left and right sides of the slide box 11, the main body 1
Two notches 12 are bored at the front and rear at positions corresponding to the notches 8. Like the notch 8 of the main body 1, the pin 10 of the bucket 9 is inserted into the notch 12, but unlike the notch 8, it is shaped like an elongated hole in the vertical direction, and its height is approximately the same as that of the notch 8. It's the same. A protrusion 14 is provided at the rear of the upper part of the slide box 11, with which the lower part of the lever 13 engages.
The rear shoulder portion is cut diagonally to form an inclined surface A, and a stopper 15 is in contact with this portion. As shown in FIG. 9, the top surface of the slide box 11 is inclined by a slight angle θ with respect to the horizontal line 8 bent at right angles in the notch 8 of the main body 1. This is because when the pin 10 is pushed deep into the front notch 8 by the slide box 11, the pin 10 is pressed against the top of the notch 12. stoppa 15
is slide box 11 and pin 10 of bucket 9
This is to prevent the slide box 11 from moving when the slide box 11 is locked, and is formed into a box shape, with an inclined surface C formed at the lower front of the slide box 11 so as to correspond to an inclined surface A at the rear of the slide box 11. However, this part is in contact with the slide box 11, and the rear part is in slidable contact with the inside of the rear part of the main body 1.
In addition, there are pins 1 on both left and right sides of the middle part of the stopper 15.
6 is fixed. Reference numeral 18 is an L-shaped lever whose middle part is rotatably supported on a pin 19 fixed to the main body 1, and has a long hole 20 bored in the rear part.
A pin 16 of a stopper 15 is inserted into the hole. A tension spring 21 is stretched between the elongated hole 20 of the lever 18, the middle part of the pivot pin 19, and the upper part of the main body 1 to hold the lever 18 in a fixed position. The spring 21 is connected to the pin 19 as shown in FIG.
The lever 18 is moved up and down around the center, and the lever 18 is held in a stable state at the end point. The lever 18 and another lever 13 are rotatably supported on the pin 19. The lever 13 is for rotating the lever 18 by the movement of the slide box 11, but the lever 18 is actuated only when turning counterclockwise, and is free when turning clockwise, and its lower end is The length is slightly below the upper end of the projection 14 of the slide box 11. Near the notch 8 on both left and right sides of the main body 1 are pins 10 fitted into the notch 8.
The backlash prevention plate 22 for pushing is pivoted, and the spring 23
is pushing upward. Further, a window hole 24 is provided at the rear of the upper part of the main body 1, and a hook 25 is fixed to the upper end of the stopper 15. If necessary, a rod 26 is inserted into the window hole 24 and the tip is hung on the hook 25. The stopper 15 can be pushed upward.
Note that 27 is a spring that pulls the slide box 11 backward.

Although the present invention is constructed as described above, the actual operation will be explained below.

Before attaching the bucket 9, that is, when the gripper main body 1 and the bucket 9 are separated, the slide box 11 is pulled backward by the spring 27, and the notch 12 at the bottom of the slide box 11 is pulled backward by the spring 27. It coincides with the vertical portion of the notch 8. In such a state, the stopper 15 is in the upwardly pulled position, and the L-shaped lever 18, which is engaged with the pin 16 on the side of the stopper 15 through the elongated hole 20, is rotated clockwise to its maximum position and rotated to its maximum position. The spring 21 that pulls the lever 18 forward is above the pin 19 that is the pivot point of the lever 18, and a clockwise force is acting on the lever 18.
The stopper 15 is held upward. Note that, at this time, the backlash prevention plate 22 is pushed by the spring 23 and pushed out to the inner part of the notch 8 to a large extent.

The main body 1 in the above state is guided onto the bucket 9 by operating the arm 2, the notch 8 is aligned with the pin 10 and lowered, the pin 10 is inserted into the notch 8, and then , move the main body 1 backward. Since the bucket 9 is fixed on the ground, the pin 10 moves laterally within the notch 8, but the side of the pin 10 pushes the side of the notch 12 of the slide box 11, and the bottom of the slide box 11 is The member 7, the upper part of which is guided by the guide plate 5, connects to the main body 1
The pin 10 is relatively moved inside the notch 8 until it comes to the inner end of the notch 8. Note that the top surface of the slide box 11 is inclined by a slight angle θ with respect to the horizontal line of the notch 8, so when it moves forward along the guide plate 5, it descends, and the top end of the notch 12 is aligned with the pin. 10
and at the same time press pin 10.
is the backlash prevention plate 22 facing the bottom of the notch 8.
It is pushed up from the lower side and fixed to the main body 1 without wobbling. slide box 11
When the lever moves forward, the protrusion 14 at the upper rear part rotates the lever 13 counterclockwise, and the L-shaped lever 18, which is operated in conjunction with this only in the counterclockwise direction, resists the spring 21. It rotates counterclockwise and pushes down the stopper 15 via the pin 16 engaged in the elongated hole 20. The stopper 15 is of course subjected to the action of its own weight, and its sloped surface slides on the sloped surface I of the slide box 11, descending, and is inserted between the rear inner surface of the main body 1 and the slide box 11 in a wedge shape. Due to the weight of the stopper 15, the inclined surface C of the stopper 15 presses the inclined surface A of the slide box 11 forward, so that the slide box 1
1 will not be able to move backwards. Thereby, the pin 10 of the bucket bag 9 is reliably and firmly connected to the main body 1.

When removing the bucket 9 from the main body 1, use the rod 26.
Insert the rod through the window hole 24 at the top of the main body 1, hook its tip onto the hook 25 at the top of the stopper 15, push the handle downward, and use the bottom of the window hole 24 as a fulcrum to insert the rod 2.
By rotating the stopper 6, the stopper 15 can be easily pulled upward. stoppa 15
When the slide box 11 comes into contact with this on the inclined surface A, it is pulled by the spring 27 and moves backward, and the notch 12 into which the pin 10 is inserted comes to the exit side of the notch 8 of the main body 1. If the main body 1 is lifted upward, the pin 10 will be removed from the notch 8, and the bucket bag 9 can be removed. It has been described that the pin 10 is pushed backward by the notch 12 of the slide box 11, but since the bucket 9 is heavy, it is impossible to move it with the spring 27, and in reality, the main body 1 is moved. This is achieved by moving it forward. Also, when the stopper 15 is pushed up by the rod 26, the L-shaped lever 1 engaged with this
8 rotates clockwise, and the line of action of the spring 21 pulling the lever 18 is above the fulcrum pin 19, so the operating direction of the lever 18 is reversed.
The lever 18 is rotated clockwise and pulled, and the stopper 15 is held in a pushed up state.

As mentioned above, the present invention locks the pin of the bucket with the notch provided at the bottom of the box-shaped main body and the notch provided in the slide box inserted into the main body, thereby attaching the bucket to the main body. In addition to making it possible to connect them, the slide box is slightly tilted, a lever operated by the slide box operates a stopper, the stopper makes it impossible to move the slide box, and a backlash prevention plate pushes the pin. Because it is attached, the bucket can not only be easily attached and detached by a single driver, but also the attachment is secure and strong, and there is no rattling or falling off, which is useful.
And it's safe.

[Brief explanation of the drawing]

The drawings are all embodiments of the present invention; Figures 1 and 2 are front views, Figure 3 is an enlarged view of part A in Figure 1, and Figure 4 is an enlarged view of part B in Figure 2. , Figure 5 is a sectional view taken along line CC in Figure 1, and Figure 6 is taken along line D-D in Figure 1.
The cross-sectional views, Figures 7, 8, and 9 are all from the 1st
Figures 10 and 11 are explanatory diagrams of the operation of section E in the figure, Figures 10 and 11 are explanatory diagrams of operation of section F of Figure 1, and Figure 12 is an illustration of the operation of section F of Figure 1.
FIG. 13, which is an explanatory diagram of the operation of part A in the figure, is a diagram showing the state before installation. 1... Body, 2... Arm, 4... Bracket, 8... Notch, 9... Bucket, 10... Pin, 11... Slide box, 12... Notch, 13... Lever, 14... ...Protrusion, 15...Stopper, 16...Pin, 18...L-shaped lever, 1
9... Pin, 20... Long hole, 22... Backlash prevention plate.

Claims (1)

[Scope of utility model registration request] It has a bracket 4 at the top for attachment to the arm 2 of the hydraulic excavator, a guide plate 5 whose mask is slightly downwardly inclined toward the front is fixed to the bottom of the bracket 4, and bucket belts 9 are installed at the bottom of both sides. A box-shaped main body 1 having a notch 8 bent at right angles into which a pin 10 is inserted; a notch 12 inserted into the main body 1 at a position corresponding to the notch 8; The projection 14 is further provided with a slide box 11 having an inclined surface A formed at its rear end and whose upper surface is slightly inclined downwardly toward the front, and an inclined surface C corresponding to the inclined surface A formed on the lower front side. a pull-up hook 25; a stopper 15 having pins 16 protruding from both sides; and a stopper 15 inserted between the slide box 11 and the rear part of the main body 1; Lever 1 that can be engaged with 14
3, an L-shaped lever 18 which is driven only in one direction by the lever 13, and whose pin 16 protruding from the stopper 15 is fitted into the elongated hole 20 at the rear; A slide box inside the main body 1 is provided with a backlash prevention plate 22 which is supported and pushed upward by a spring 23, and when the pin 10 of the bucket 9 is inserted into the notches 8 and 12 and the main body 1 is moved backward. 11 are mutually moved forward along the lower surface of the guide plate 5, the pin 10 is positioned at the back of the notch 8 and against the upper end of the notch 12, and the L-shaped lever 18 is rotated. An attachment attachment/detachment device characterized in that the inclined surface C of the stopper 15 presses the inclined surface A of the slide box 11 due to the operation weight and the weight of the stopper 15.