SU906430A1 - Corn snapper - Google Patents

Description

(54) POST-SEPARATING DEVICE

one

FIELD OF THE INVENTION The invention relates to agricultural machinery, in particular, to corn harvesting machines.

Cylindrical, eccentric rollers are known, whose vrashenz axes are mixed with respect to the geometric axes of the crush device. The axis of oscillation of the rollers coincide with the axis of their rotation, and the frequency of oscillation of the rollers equals the frequency of rotation 1.

However, as the oscillation frequency increases, the rotational speed of the rollers increases, causing damage to the cobs.

A mating device is known, comprising a frame, a pair of rollers mounted on eccentric shafts, and a shaft driving mechanism 2.

The disadvantage of such a device is the delay and accumulation of stems in the back of the channel.

The purpose of the invention is to improve the quality of cleaning and reduce the damage of the ears.

The goal is achieved by the fact that the device is equipped with roller drive mechanisms.

each of which has a planetary gearbox, the sun wheel of which is mounted on the shaft, and the satellite is fixed on the roller coaxially with it, each eccentric shaft drive mechanism has a pair

 elliptical gears.

FIG. 1 shows a maize picker; in fig. 2 is a kinematic diagram of the device; in fig. 3 is a graph of change in the frequency of rotation of the drum in one

10 period for one revolution of the drive wheel; in fig. 4 is a graph of the variation of the rotational speed of the drum.

The maize pickup device comprises an eccentric shaft 1, a drum 2, a planetary gear 3, a roller drive pin 4, a drive mechanism 5, a pulley 6 for the drive of the eccentric shaft 1, a frame 7.

At the end of the roller 2, the gear wheel-satellite 8 is fixed coaxially with the roller, the gear wheel engages with the sun wheel 9.

20 Wheel 9 is mounted on a bearing in the wall of the frame 7. The main journals of the eccentric shaft 2 are supported on the front and rear bearings. The mechanism for transmitting the rotation to the eccentric shaft 1 has a pair

cylindrical elliptical gears 10 and 11.

The rotation is transmitted to the roller 2 via the drive pulley 4, the satellite satellite 8. The rotation is transmitted to the eccentric shaft 1 through the drive pulley 6 and a pair of elliptical gears 10 and 11. The wheel 8 is made with an external gear, the wheel 9 with an internal gear the crown. The axis of rotation of the wheels 8 and 9 are shifted by the amount of eccentricity. When the wheel 9 and the eccentric shaft 1 rotate, the wheel 8 rolls around the wheel 9. In this case, the roller 2 communicates rotation and oscillations with variable frequencies. Frame 7 is fixed to the frame of the corn harvesting machine by means of a suspension.

The operation of the device is as follows.

When the maschine moves along a series of plants, the latter plant cones into the channel between rolls 2 and are rolled by rolls 2 and vibrations with a small amplitude and high, variable in magnitude, frequency.

Under vibration with variable frequency, the stems, without delay and seizure between the rollers, pass along the channel. When the cob base contacts the rotating surfaces of the rollers, under the vibrating effect of a variable frequency, the stems lose contact with the cobs, after which the separated cobs are retracted from the bed and dropped onto the conveyor.

The variable speed and oscillation frequency of the drum 2 are provided by the variable gear ratio of the elliptical gears 10 and I.

In the first embodiment (fig.Z), the axis of rotation of the wheels coincide with the foci of the contours of the wheels. In the second variant (Fig. 4), the axes of rotation of the wheels coincide with the geometric centers of the wheels. In both embodiments, at a constant rotational speed of the driving wheel 10 (const), the rotational speed of the drum 2 is a variable value. In the first embodiment, we have one period, in the second two periods of change in the rotational speed of the driven wheel 11 and drum 2 for one revolution of the driving wheel 10. In the first embodiment

The frequency of rotation of the drum 2 reaches a maximum cJp at jiOBOpOTA angles of a wheel 10 oh, 2nd and a minimum of rio s SL. In the second variant, the frequency of rotation of the drum 2 reaches a maximum at the angles of rotation of the wheel 10 baO,

in to and in 25i. and a minimum of tnin P in and 6 3 / 25i. As can be seen, the limits of variation of the rotation frequency, (and / P1ax -) and, accordingly, the oscillation frequency of roller 2 in the first embodiment are greater than in the second.

Due to this performance of the chopping device, it is possible to optimally combine the variable frequency of the oscillations with the variable frequency of rotation of the rollers and provide the possibility of harvesting, in addition to the cobs, various types of vegetables, as well as increase the productivity.

Claims (2)

1. USSR author's certificate number 147959, cl. A 01 D 45/02, 1962. 2. USSR author's certificate number 556743, cl. A 01 D 45/02, 1977. / 3123Г 2 oJo j Bo FIG. five Uj T . / 2 I one J; 6 „ S / 2y FIG.