SU1491386A1 - Rig for simulating berry-picking process - Google Patents

Abstract

The invention relates to agricultural machinery, in particular, to devices for studying the removal process a year. The aim of the invention is the expansion of operational capabilities. The bench for studying the removal process a year contains a rack 1, which is mounted on a tripod 2 and can be rotated about a horizontal axis. A guide 4 is located on the rack 1, and stops 5 are placed on the sides of the rack 1. The guide 4 passes through the holes in the body of the platform 6 on which the holder 9 is mounted in the clip 8 in the form of a rod that has an opening at the end in which the fruit stem sample. On the platform 6 fixed lever with interchangeable goods. By rotating the holder 9 around its axis in the clamp 8, the required position of the axis of the sample stem relative to the axis of the guide 4 is set. The rack 1 is rotated around the horizontal axis, fixed in the desired position determined by the angle X on the scale. Pad 6 is set to its initial position from the level of its contact with the stops 5, then abruptly release pad 6 and the value of Y, at which fetal separation occurs, is determined. 1 hp ff, 5 ill.

Description

The invention relates to agricultural machinery, in particular, to devices for studying the removal process a year.

The aim of the invention is the expansion of operational capabilities.

FIG. 1 shows a stand for examining the removal process for a year, front view; in fig. 2 is a section A-L in FIG. one; in fig. 3 is a view B in FIG. 2; in fig. 4 shows the trigger mechanism j in FIG. 5 is a sectional view BB in FIG. 3

The stand for examining the removal process year contains a rack 1, made in the form of a rectangular frame, which is mounted on a tripod 2 and can be rotated about a horizontal axis 3 in the form of a bolted joint. On the rack 1 parallel to its long sides there is a guide 4, made in the form of two cylindrical parallel rods. On the indicated sides of the rack 1, stops 5 are placed, the surface of each of which is spherical. The guide 4 passes through the holes in the body of the platform 6, which is connected to one of the short sides of the rack 1 by means of a spring 7, the latter axis being parallel to the axis of the guide 4. On the platform 6 in the clamp 8 there is a holder 9 in the form of a rod having the end of the hole in which the stem of the test sample 10 is fixed with the help of screw 11. The holder 9 has the ability to rotate about its axis, parallel to the axis

3. On the platform 6 in the plane passing through its center of gravity and the axis of the holder 9 parallel to the guide

4, a lever 12 is fixed on which a set of removable weights 13 is located. The loads 13 have the possibility of moving along the axis of the lever 12 and fixing

 on it with the help of nuts 14.

At the level of the final position of the stop 5, the rods of the guide 4 are thinner in cross section. In the side of the rack 1 opposite to the point of attachment of the spring 7, a screw 15 with a trigger hook 16 is installed, and the pad 6 is provided with a ring 17.

Hour 1 is provided with a linear scale 18 for determining the movement of the pad 6 along the guide 4 and an angular scale 19 for determining the angle

0

five

0

five

0

five

0

five

rotation of rack 1, as well as catcher 20 for collecting spent samples.

Work on the stand is as follows.

In the hole at the end of the holder 9, the stalk of the test sample 10 is clamped. Due to the rotation of the holder 9 around its axis, the required position of the axis of the stalk of sample 10 relative to the axis of the guide 4 is set in the clamp 8, turning around the axis 3, fixed in the desired position, the angle with the scale 19. The platform 6 is set in the initial position in height H from the level of its contact with the lugs 5, determined on a scale of 18. The installation of the platform 6 in the initial position is carried out by hooking the ring 17 by the hook 16. Heights H installation site is adjusted by moving the screw 11 along its axis.

Pressing the hook 16, sharply release the pad 6, which under the action of the spring 7 picks up speed from zero in the initial position to V at the moment it touches the stops 5. The velocity vector V of the pad 6 with this direction is parallel to the direction of motion 4. Due to abrupt braking of the platform 6 against the stops 5 in the sample 10, inertia forces arise, the direction of which coincides with the direction of the velocity vector V. Due to the change in height II, the value V is determined, at which tearing occurs a year. The work spent on the gap year is determined by the formula

2

mVcTp A -2-.

where VgT-p is the speed at which the gap occurs year, m / s; m - mass years, kg. The magnitude of the velocity V is determined from the expression

50

VCTP to

 (H2 + 2xH) + 2gHcoso (J

where K - coefficient taking into account losses due to friction, as well as air resistance (K 0.9 ... O, 95);

M - total mass of the site and parts located on it, kg;

51

с - spring stiffness, N / m; H - the height of the installation site, m;

X - spring deformation in the final position of the platform, m; d is the angle of deviation of the axis of the guide from the vertical (the angle of the direction of the velocity vector V relative to the gravity vector applied to the fetus).

In the study of separation, there are three possible locations for the center of the body of the platform 6 with lever 12 fixed on it with weights 13, rod 9, clip 8 and ring 17 relative to the plane passing through the axis of the spring 7 and the point of contact of platform 6 with stops 5: The sheet lies in the given plane, is shifted in the direction of the axis of the lever 12 and shifted in the direction of the axis of the rod 9. In the first

866

The platform 6, after contact with the stops 5, remains stationary, and in the second and the third it rolls around the spherical surface of the stops 5.

Claims (2)

Formula of Invention one; The stand for the research and dismantling process of the year, containing a stand with an emphasis and a guide installed parallel to it, on which the platform with the holder is placed, is about the same, so that, in order to improve operational capabilities, the rack and the holder are installed with the possibility of rotation in the horizontal plane, and the platform is equipped with a lever with a load, and the lever is placed in the plane of the holder. 2. Stand according to claim 1, characterized in that the surface of the abutment is curved. woo //////////////////// l