JPS636264Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a work equipment attachment/detachment device for construction machinery.

As shown in Fig. 1, a construction machine such as a shovel loader has a bucket a that is a working machine connected to the tips of a boom b and a tilt rod c via lock pins e and f, and the work machine can be attached or detached. To do this, each of the lock pins e and f must be attached and detached one by one. As shown in Figure 2, each lock pin e and f must be attached to the bucket door a side (or boom b or tilt rod c side) using bolt q.
It is difficult to attach and detach the bucket because it is fixed to the bucket, and in addition, because the bucket is heavy, it takes a lot of effort and time to attach and detach the bucket.

The present invention has been made in consideration of the above-mentioned problems, and it is an object of the present invention to provide a work equipment attachment/detachment device for construction machinery that allows the above-mentioned work equipment to be attached/detached by simple operations from the driver's seat.

Embodiments of the present invention will be described below based on FIG. 3 and subsequent figures.

This embodiment shows the case of a shovel loader which is an example of a construction machine, and numeral 1 in the figure is a bucket which is the working machine. Two mounting members 2a and 2b are fixed to the back side of the bucket bag 1 in parallel to the left and right. A hook 3 is provided at the upper part of both the mounting members 2a, 2b, and an engagement hole 4 is provided at the lower part.

Reference numeral 5 denotes an intermediate device, and this intermediate device 5 has upper and lower cross tubes 6, which are provided vertically in parallel.
7, side frames 8 and 9 that connect both ends of both cross tubes 6 and 7, and two intermediate frames 1 that connect intermediate parts of both cross tubes 6 and 7.
It consists of 0 and 11. This intermediate frame 1
0 and 11 are provided in parallel with a predetermined interval.
Boom mounting holes 12, 12 are provided at the bottom of the side frames 8, 9, and intermediate frames 10, 11 are provided at the bottom of the side frames 8, 9.
Holes 13, 13 for mounting the tilt rod are provided in the upper part of the holder. The upper cross tube 6 has a diameter that allows the hook 3 provided on the bucket bag 1 to engage with it. Further, the side frames 8 and 9 are provided with mounting members 2a and 2b in a state in which the hook 3 of the bucket 1 engages with the upper cross tube 6 and the mounting members 2a and 2b are in contact with the lower cross tube 7.
Fixing holes 14, 14 facing the engagement hole 4 of 2b are provided.

The intermediate frames 10 and 11 are provided with rotation support holes 15 and 16 at two vertically shifted positions, and an arcuate hole 17 centered on the axis of the upper rotation support hole 15 in the vertical direction. The lower rotation support hole 16 is located below the circular arc hole 17, and is provided at the same axial position as the fixing holes 14, 14 provided in the side frames 8, 9.

Reference numeral 18 indicates a rotation pin that engages in the lower rotation support hole 16 in the axial direction and is rotatably supported, 19 indicates a connecting pin inserted into the circular arc hole 17, and 20 and 20 fix the side frames 8 and 9. These are engagement pins inserted into the holes 14, 14, and each of these engagement pins 20, 20
is connected to the end of the connecting pin 19 via first links 21, 21. Also, the first links 21, 21
and the tip of the rotating pin 18 are the first link 2
1 and 21 are connected by second links 22 and 22 having a length of 1/2. 23 is a rotation shaft, and this rotation shaft 23 is fitted and supported in the rotation support hole 15 on the upper side of the intermediate frames 10, 11. This rotating shaft 23
One end of an arm 24 is fixed to the. The intermediate portion of the connecting pin 19 is rotatably fitted to the tip of the arm 24. One end of an auxiliary lever 25 is fixed to one end of the rotating shaft 23, and one end of a lever 26 is rotatably fitted adjacent to this. Both levers 25 and 26 are frictionally engaged in the rotational direction by bolts 25a, and a rotational force of more than a predetermined magnitude is applied to the auxiliary lever 25 by the lever 26 forward as shown by the arrow. At times, both the levers 25 and 26 are disengaged and only the lever 26 is rotated forward.
27 is a toggle spring that connects the lower cross tube 7 and the lever 26;
When the lever 26 is rotated, the lever 26 is fixed at each position beyond the pivot point of the lever 26 by a spring bias. A protrusion 28 is provided at the tip of the lever 26.

On the other hand, 30 is a boom, and 31 is a tilt rod.
2 and 12, and the tip of the tilt rod 31 is provided with the hole 1 for attaching the tilt rod of the intermediate frame 10, 11.
3 and 13 are connected. Reference numeral 32 designates a stopper fixedly attached to the boom 30, with which the protrusion 28 of the lever 26 comes into contact when the intermediate device 5 is tilted rearward. Reference numeral 33 denotes a hook provided near this stopper 32 so as to be freely rotatable in the front-rear direction, and by rotating this hook 33 forward, the protrusion 28 of the lever 26 of the intermediate device 5 in the maximum tilted state is removed. It is becoming more and more engaged. Hook 33
A lever 35 is provided on the rotating shaft 34 that supports the lever 35, and a rod 36 is connected to the tip of the lever 35. And the other end of this rod 36 is the boom 3
The hook 33 is connected to the tip of an intermediate lever 37 pivoted on the 0 side so as to engage only in the direction of rotating the hook 33 rearward. A spring 38 is interposed between the rod 36 and the intermediate lever 37 to bias the hook 33 forward. Hook 3
An inclined surface 39 is provided at the inner end of the lever 3 so that the protrusion 28 of the lever 26 can be easily removed. The intermediate lever 37 is a knob 40 located on the driver's seat.
are connected to each other via a cable 41.

The operation of the work implement attachment/detachment device with the above configuration will be described below.

(1) When attaching a working device Approach the bucket 1 with the intermediate device 5 in the dump state with the main lever 26 rotated backwards (FIG. 10). After the upper cross tube 6 of the intermediate device 5 engages the hook 3 of the bucket 1 from below, the intermediate device 5 is tilted (raised).
do. In this way, the lower side of the attachment members 2a, 2b of the bucket bag 1 comes into contact with the cross tube 7 on the lower side of the intermediate device 5, and the bag bag 1 becomes stable. When the lever 26 is further tilted from this state, the tip of the lever 26 comes into contact with the stopper 32 of the boom 30 (FIG. 11), and the lever 26 is pushed forward.
When the lever 26 is pushed forward, the arm 24 rotates via the rotating shaft 23, and the connecting pin 19 moves downward along the arcuate hole 17 provided in the intermediate frames 10, 11. When the connecting pin 19 moves downward, the engaging pins 20 and 20 are pushed out to both sides via the first and second links 21 and 22, and their tips engage the engaging holes 4 of the bucket 1, and The bucket 1 is attached to the intermediate device 5 by.
At this time, the lever 26 is held by the toggle spring 27 and receives the thrust force of the engagement pins 20, 20.

At this time, even though the engagement pins 20, 20 have resistance and cannot be engaged with the engagement hole 4 of the bucket 1, the intermediate device 5 is tilted and the lever 2
6 is forcibly rotated, the lever 26 and the auxiliary lever 25 disengage, and only the lever 26 rotates, the rotating shaft 23 including the auxiliary lever 25 does not rotate, and the mechanism below the rotating shaft 23 is protected. be done.

(2) When removing the working device When the bucket 1 is fully tilted and the knob 40 on the driver's seat is pulled, the hook 33 will rotate forward via the cable 41, etc.
3 is the tip projection 28 of the main lever 26 of the intermediate device 5
is engaged with.

When the intermediate device 5 is dumped (tilted forward) in this state, the lever 26 is pulled relatively backward. As a result, the connecting pin 19 is moved upward, and the engaging pins 20, 20 are retracted and removed from the engaging hole 4 of the bucket bag 1. In this state, the protrusion 28 of the lever 26 faces the inclined surface 39 of the hook 33 (Fig. 9), and if the dumping operation continues, the hook 33 rotates against the spring 38, and the protrusion 28 is removed from the hook 33. It comes off.

Further, by moving the vehicle backward while dumping the intermediate device 5, the intermediate device 5 and the bucket 1 are separated.

The present invention is as described above, and the construction machine boom 3
In a work equipment attachment/detachment device for construction machinery in which a work equipment such as a bucket truck 1 is attached to the tip of a tilt rod 31 so as to be capable of tilting and dumping operations, upper and lower cross tubes 6, 7 and both ends of both cross tubes 6, 7 are used. side frame 8 that connects the parts;
9, and an intermediate frame 10,1 that connects the intermediate device.
1, a lever 26 provided on the intermediate frames 10 and 11 so as to be rotatable in the front-rear direction and positionable at both end positions with toggle springs 27; and a rotating shaft 23 that rotates integrally with the lever 26. The arm 24 is fixed to the intermediate frame 10, 11, the rotating pin 18 is supported by the intermediate frames 10, 11, and
A connecting pin 19 is supported by the arm 24 so as to be vertically movable, and is rotatably fitted to the tip of the arm 24. The connecting pin 19 is connected to both ends of the pins 18 and 19 via links, and the connecting pin 19 is vertically movable. The left and right engaging pins 2 are supported on the side frames 8 and 9 so as to be moved in the left and right directions when the pins are moved in the left and right directions.
0 and 20 constitute an intermediate device 5, and the lower part of the intermediate device 5 is connected to the boom 30 and the upper part to the tilt rod 31, and the intermediate device 5 is connected to the boom 30 to rotate backward when the intermediate device 5 is tilted. A stopper 32 contacts the tip of the lever 26 in the moved state and rotates it forward, and also engages with the tip of the lever 26 in the forward rotated state when the intermediate device 5 is tilted A hook 33 that is rotatable in the engagement and disengagement direction is provided, and this hook 33 is connected to a knob 40 provided on the driver's seat via a linkage such as a cable 41, and the above-mentioned The hook 3 engages with the cross tube 6 on the upper side of the intermediate device 5 from above, and the intermediate device 5
Since the work equipment attaching/detaching device of the construction machine is constructed by providing the engaging holes 4, 4 that engage with the engaging pins 20, 20 protruding from the side frames 10, 11 of the construction machine, the intermediate device 5 can be tilted and dumped. At the same time, by operating the knob 40 located at the driver's seat, the work implement can be attached and detached with simple operation from the driver's seat. Further, according to the present invention, the engaging pin 2 is moved by tilting and dumping the intermediate device 5.
Since the engagement pins 20 and 20 are engaged and disengaged, an actuator for operating the engagement pins 20 and 20 is not required and can be obtained at low cost.

[Brief explanation of the drawing]

FIG. 1 is a side view of a conventional shovel loader.
The figures are exploded perspective views of the working machine section, and Fig. 3 and subsequent figures show an embodiment of the present invention, with Fig. 3 being a perspective view showing the back of the bucket, Fig. 4 being an exploded perspective view of the intermediate device, Fig. 5 being a rear view of the intermediate device, Fig. 6 being a cross-sectional view taken along line - in Fig. 5, Fig. 7 being a structural explanatory view showing the intermediate device and the boom side mechanism, Fig. 8 being a perspective view showing the boom side mechanism, Fig. 9 being a structural explanatory view showing the relationship between the lever of the intermediate device and the hook of the boom side mechanism, and Figs. 10 and 11 being explanatory views of operation. 1 is a bucket, 3 and 33 are hooks, 4 is an engagement hole, 5 is an intermediate device, 6 and 7 are cross tubes,
Reference numerals 8 and 9 denote side frames, 10 and 11 denote intermediate frames, 18 denotes a rotation pin, 19 denotes a connecting pin, 20 denotes an engagement pin, 23 denotes a rotation shaft, 24 denotes an arm, 26 denotes a lever, 27 denotes a toggle spring, 30 denotes a boom, 31 denotes a
is a tilt rod, 32 is a stopper, 40 is a knob,
41 is cable.

Claims (1)

[Scope of utility model registration request] Construction machine boom 30 and tilt rod 31
In a work equipment attachment/detachment device for construction machinery, in which a work equipment such as a bucket 1 is attached to the tip of the bucket so that it can be tilted and dumped, the upper and lower crosstubes 6, 7
, side frames 8 and 9 that connect both end portions of both cross tubes 6 and 7, intermediate frames 10 and 11 that connect the intermediate portions, and a toggle spring that is rotatable in the front and rear direction and at both rotation end positions. A lever 26 provided on the intermediate frames 10, 11 so as to be positionable at 27, an arm 24 fixed to a rotating shaft 23 that rotates together with the lever 26, and a rotating pin supported on the intermediate frames 10, 11. 18, a connecting pin 19 supported by the intermediate frames 10 and 11 so as to be vertically movable and rotatably fitted to the tip of the arm 24, and both pins 18,
19 through links, connecting pin 1
Intermediate device 5 is constituted by left and right engagement pins 20, 20 supported on side frames 8, 9 so as to move in the left and right direction when pin 9 moves in the vertical direction. At 30,
a stopper 32 whose upper part is connected to the tilt rod 31, and which contacts the tip of the lever 26 in a rearwardly rotated state and rotates it forward when the intermediate device 5 is tilted; Similarly, when the intermediate device 5 is tilted, a hook 33 is provided which engages with the tip of the lever 26 in a forwardly rotated state and is rotatable in the engagement/disengagement direction.
This hook 33 is connected to a knob 40 provided on the driver's seat via a linkage such as a cable 41, and is further connected to the intermediate device 5 on the back of a working machine such as a bucket 1.
A hook 3 that engages the upper cross tube 6 from above, and side frames 10, 1 of the intermediate device 5.
1. A working machine attachment/detachment device for a construction machine, characterized in that engagement holes 4, 4 are provided to engage engagement pins 20, 20 protruding from the construction machine.