FI95443C - Type of device - Google Patents

Description

1 9544ο

SHOCK DEVICE

The invention relates to an impact device as set out in the preamble of claim 1, which is used in connection with a working machine to produce vibration or similar series of impacts.

Impact devices with four co-rotating axes and eccentrically arranged masses on each axis are already known. Two of the shafts are arranged to rotate at twice the speed of the other shafts by means of a transmission. The adjacent rotating shafts rotate in opposite directions, so that the eccentricity of their masses of the same magnitude causes a mainly vertical impact. The other pair of shafts rotates at twice the speed and is usually housed with smaller masses. The aim of the smaller masses is to compensate for the vertical impact caused by the larger masses in the other direction, e.g. upwards, and to intensify the vertical impact downwards. This is accomplished when the smaller masses rotate at twice the speed of the right mass relative to the larger masses.

With this solution, the impactor is effective in one direction and the direction of the impacts can be varied by turning the entire impactor in the desired direction. However, the structure does not easily allow shocks that have to be directed both downwards and upwards, because in this case the impactor must be detached from its clamps and turned 180 *.

The present invention overcomes these drawbacks and is characterized by what is set forth in the characterizing parts of the claims.

The advantage of the invention is that the most effective direction of impact of the impactor can be easily reversed without turning the impactor itself. The phase transfer of the masses is carried out in the impactor as an internal transfer by remote control and preferably by means of hydraulic pressure. The structure of the shafts remains strong and the hydraulically implemented phase shift does not contain vibration-damaged parts.

2 95443

The ability of the impactor to quickly reverse the direction of impact is a useful feature, for example, when hitting piles on the ground. By changing the direction of impact, piles can also be struck from the ground with the same impactor.

In the following, the invention will be explained in more detail with reference to the accompanying drawing, in which

Figure 1 shows a four-axis vibrating device.

Figure 2 shows the vibrating device in phase shift.

Figure 3 shows the vibration force curve of the impactor of Figure 1.

Figure 4 shows the vibration force curve of the impactor of Figure 2.

Figure 1 shows an impact device with four rotating shafts 20,21,3 and 4 and with their accompanying rotating eccentric masses 11,22,5 and 6. The hydraulic drive motor to rotate the shaft 20 in the direction of the arrow, and further in each axis 1,2,13,14 gears transmit the rotation of each shaft and with rotating masses.

When the shaft 20 is rotated counterclockwise according to Fig. 1, the gear 1 also starts to rotate and with it the other gears 2,13 and 14 and the shafts 3 and 4. The hydraulic pressure applied to the chamber 7 through the hole 9 drilled in the shaft 21 ensures that the shaft 21 and its mass 22 rotates in the phase shift shown in the figure with respect to the gear 2 rotated by the gear 1. A hydraulic valve 12 is connected to secure this position. The smaller masses 5 and 6 rotating twice as fast enhance the downward impact of the masses 11 and 22 in the pattern situation. The smaller masses compensate for the upward impact of the larger masses, being in the pattern position even when the larger masses are 180 ° turned. Fig. 3 shows the impact effect caused by the rotation of all four masses up and down when the device according to Fig. 1 is rotated. The impact effect is clearly the most effective downward and the frequency of the impact is one downward impact per revolution of the shaft 1. There is no lateral impact, because the centrifugal forces of the counter-rotating masses of $ 3,545 cancel each other out laterally.

The chambers 7 and 8 are formed in gear blanks and the piston is itself the eccentric masses li and 22. The chambers are sealed, for example, with annular seals.

In Figure 2, the eccentric masses 11 and 22 are shifted by a phase shift of 90. The valve 12 is in a position where the hydraulic pressure is conducted from the hole in the shaft 20 along the channel 10 and the chamber 8 is now formed at the point shown in Figure 2. The gear 1 has rotated counterclockwise with respect to the shaft 20 and has also rotated the gear 2 clockwise. The chamber 7 shown in Figure 1 has been drained of hydraulic oil through the valve 12 and the chamber 7 in Figure 2 is now in a new location on the other side of the pulp 22. When the impactor is now rotated, the main direction of impact becomes upwards according to the curve of Figure 4, which illustrates the vertical effect of all four masses.

Figures 1 and 2 show the phase displacement of the displaceable masses 11 and 22 with the aid of hydraulic pressure, other types of displacement of the masses relative to the gears, mainly mechanically, are also possible by means of rotary motors and transmission devices suitable for displacement.

If the masses 11 and 22 connected to the larger gears 1 and 2 are moved, the phase shift is 90 °. If the smaller masses and 5 and 6 are transferred in the described hydraulic or mechanical way, the phase shift must be 180 °. With these values of the phase shifts shown, the main direction of impact is cast inverted.

The invention is not limited to the accompanying embodiment, but many modifications are possible within the scope of the inventive idea defined by the claims. Among other things, the amount of phase shift required may vary and depends on the gear ratio selected between the masses rotating at different speeds so that the interaction of the masses occurs at the right moment.

Claims (3)

95445 1. In the case of a producer of slag with a rotary massor, and in the case of an anchovy finer with an eccentric placer massor (5,6,11,22), with a centrifugal scraper and a single grid on which the rotary mass enters all (see, in the case of a genome of which a trackmedium is used, the spin-offs of a mass of a trackmedium, 7.8) on the other side of the axis, (7,8) apassad mellan en Axel ( 20,21) och massan (11,22), vilken kamarare har expansionsför-mäga och orsakar ömsesidig vridrörelse. ** 2. In the case of a patent according to claim 1, the axle (20,21) is rotated 90 ° or n x 90 °. A device for generating impacts by means of rotating masses, comprising a plurality of eccentrically arranged rotating masses (5, 6, 11, 22), the combined effect of centrifugal forces of which is greatest in a given direction and which can be changed by rotating the masses relative to each other, characterized in that the masses to rotate by means of the pressure medium, an expandable chamber (7, 8) causing mutual rotation is arranged between the shaft (20, 21) and the mass (11, 22), into which the pressure medium is introduced. Device according to Claim 1, characterized in that the masses are rotated by their shafts (20, 21) by a phase shift of 90 ° or n x 90 °. Device according to Claims 1 and 2, characterized in that the rotary motor of the device is a hydraulic motor. 3. En anordning enligt patentkrav 1 eller 2 k ä n n e -. tecknad av, att en hydraulisk motor är som en rote- ringmotor för anordningen. Il