JPS5917979Y2 - Vibration ripper device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a vibrating ripper device that is used by being attached to a construction vehicle such as a bulldozer.

It is known that adding vibration to a ripper device increases its ability to crush the ground and improves work efficiency.

That is, the ripping ability is generally controlled by two forces: the force that pushes the ripper into the ground (vertical force FY), and the traction force of the bulldozer (horizontal force FX).

By applying vibration to the ripper cutting edge, ground resistance in both the Fx and Fy directions can be reduced, making it possible to work in harder soil and at faster speeds with the same weight bulldozer.

A conventional vibrating ripper device of this kind is shown in FIGS. 1 and 2, and is attached to the upper part of a ripper device C that is attached to, for example, a bulldozer a via a four-bar link b, as shown in FIG. The configuration is such that the shaker d is fixed, and in this case,
The vibration directly acts on the hydraulic cylinder of the four-bar link b, which is the device that applies the pushing force Fy, resulting in oil leakage and having a negative effect on the strength and durability of the bulldozer itself.

The example shown in FIG. 2 is an improvement on the drawbacks of the example shown in FIG. The spring e needed to be strong enough to withstand a large Fy, and there was a contradiction in that if the spring e was made stronger, the vibrations bouncing back on the pushing device would also become larger.

The present invention was developed in consideration of the above-mentioned issues.The vibration of the ripper is hardly transmitted to the box body and the pushing device, and the pushing force and vibration force can be effectively transferred to the ripper without the need for intervening springs, etc. Furthermore, since the vibrations of the two vibrating ripper shafts are in opposite phases to each other, the vibration waves propagating to the ground interfere with each other and cancel each other out, thus reducing vibration pollution in the surrounding area. It is an object of the present invention to provide a vibrating ripper device that can perform the following functions.

The configuration will be explained below based on the embodiment shown in FIG. 3 and below.

In the figure, 1 is a bulldozer, 2 is a vibrating ripper device according to the present invention that is attached to the bulldozer 1 by a pushing device 3 made of a four-bar link, etc. This vibrating ripper device 2 is shown in FIGS.
It is as shown in the figure.

That is, 4 is a box connected to the pushing device 3,
A support shaft 5 is fixed to the center of this, and a cross-shaped swing lever 6 is swingably supported on the support shaft 5.

A lever member 6 a that faces the swing lever 6 vertically
, 6b has an eccentric weight 7a at its end.

7b is a rotatably supported support.

A gear 8a having the same number of teeth is mounted on the shaft of both eccentric weights 7a and 7b.

The gears 8a, 8b are connected to the drive gear 10 via the idler gear 9 supported on the support shaft 5, and the eccentric weights 7a, 7b are fixed on the support shaft 5. This is done so that the posture is always axially symmetrical with respect to.

The drive gear 10 is connected to a motor 12 via a belt 11.

Ripper shafts 13a and 13b are provided on both sides of the support shaft 5.
is slidably supported in the box body 4 in the vertical direction, and the ends of the lever members 6C, 6d facing left and right of the swing lever 6 are connected to the ripper shafts 13a, 13b by links 14.
．． It is connected via 14.

Both ripper shafts 13 a and 13 b are elastically supported by springs 15 in the vertical direction with respect to the box body 4 .

Further, disc-shaped rippers 16, 16 are rotatably attached to the lower ends of both ripper shafts 13a, 13b.

In the above configuration, by rotationally driving the motor 12, the eccentric weights 7a and 7b rotate axially symmetrically with respect to the support shaft 5, and the swinging lever 6 swings left and right. The shafts 13 a and 13 b are vibrated in the vertical direction, and the disc-shaped rippers 16 perform ripping while vibrating.

The vibrations at this time have opposite phases to each other on the left and right sides, and the vibration waves propagating to the ground interfere with each other and cancel each other out.

That is, the vibration periods of the left and right rippers 16, 16 are as shown in FIG. 7, and the left and right vibration waves A, B are out of phase by 180 degrees, so the vibration period of the ground acceleration received from both rippers is also The vibration waves propagating to the ground from the left and right rippers 16, 16 with the same <180° phase shift as the waveform shown in FIG. 7 interfere with each other in the ground and are cancelled.

In the above embodiment, an example is shown in which disk-shaped rippers 16, 16 are used, but a normal claw-shaped ripper 16' may also be used as shown by the chain line in FIG.

The vibrating ripper device according to the present invention is as described in detail above, and a support shaft 5 is provided in the box body 4 which can be attached to a pushing device such as a four-bar link, and ripper shafts 13 are provided on both left and right sides of the support shaft 5. a, 13b are provided so as to be vertically movable and supported by a spring 15 in the vertical direction, and a swing lever 6 formed in a cross shape is provided on the support shaft 5 so as to be swingable. Eccentric weights 7a, 7 are attached to the lever parts 6a, 6b.
b is freely rotatable, and both weights 7 a and 7 b are always axially symmetrical with respect to the support shaft 5 and connected to a rotary drive source so as to rotate synchronously, and The left and right lever parts 6 C and 6 d of the lever 6 are connected to the left and right ripper shafts 13 a and 13 b, respectively, so that both ripper shafts 13
Since the zippers 16 and 16' are attached to the lower ends of a and 13b, the vibration of the rippers 16 and 16' is hardly transmitted to the box body 4 and the pushing device, and the pushing force and the vibration force are effectively transferred to each other, and the spring etc. can be added to the ripper 16, 16' without the need for interposition.

Furthermore, since the vibrations of the two vibrating ripper shafts 13a and 13b are in opposite phases to each other, the vibration waves propagating to the ground interfere with each other and cancel each other out, thereby reducing vibration pollution in the surrounding area. be able to.

[Brief explanation of the drawing]

1 and 2 are configuration explanatory diagrams showing a conventional example, and FIG. 3 and the following show a vibrating ripper device according to the present invention.
The figure is a side view, Figure 4 is a front view, Figure 5 is a cross-sectional view showing the main parts, Figure 6 is a cross-sectional view taken along the VI-■ line in Figure 5, and Figure 7 is the vibration period of the left and right rippers. FIG. 4 is a box body, 5 is a support shaft, 6 is a swing lever, 6 a, 6
b, 6C, 6d are lever parts, 7a, 7b are weights, 13a. 13b is a ripper shaft, 15 is a spring, and 16.16' is a ripper.

Claims (1)

[Scope of utility model registration request] A support shaft 5 is provided on the box body 4 which can be attached to a pushing device such as a four-bar link, and ripper shafts 13 a and 13 b are mounted on both left and right sides of the support shaft 5 so as to be movable up and down and supported by springs 15 in the up and down direction. A swinging lever 6 formed in a cross shape is swingably provided on the support shaft 5, and eccentric weights 7a, 7b are attached to upper and lower lever portions 6a, 6b of the swinging lever 6.
is rotatably connected to a rotary drive source so that both weights 7a and 7b are always axially symmetrical with respect to the support shaft 5 and rotate synchronously. °
The left and right lever parts 6C and 6b are connected to the left and right ripper shafts 13a and 13b, respectively, and both ripper shafts 13a and 1
A vibrating ripper device characterized in that rippers 16, 16' are attached to the lower end of the vibrating ripper 3b.