SU1074725A1 - Smoothing device - Google Patents

Description

The invention relates to technological equipment for the manufacture of concrete products, namely, devices for smoothing concrete mixes in forms, and can be used to grind the finishing composition applied to the surface of the hardened product while eliminating pores, cavities, and cavities.

Closest to the invention is a smoothing device, containing a portal with mounted on it with the possibility of vertical movements a smoothing working body in the form of a hollow bar, which has a connecting rod-crank mechanism with a reciprocating drive moved 13.

However, the known device is characterized by insufficient surface quality of the product.

The aim of the invention is to improve the quality of the product.

This goal is achieved by the fact that the smoothing device, containing the portal portal with mounted on it with the possibility of vertical displacements, is a working tool in the form of a hollow beam, and a connecting rod-crank mechanism with a drive of reciprocating movement, is parallel to the installed bar and kinematically connected with the drive of reciprocating movement of the shaft with an eccentric and multidirectionally fixed kula.chkami, interacting with the side wall of the beam, and the connection The connecting rod with a bar and a crank is made in the form of ball bearings.

The device is equipped with a removable smoothing ski mounted under the beam. It is made with curved edges, the front part of the ski is horizontal and the rear is at an angle of 1-3 to the horizontal, while the beam is sectional.

FIG. 1 shows the device, the overall appearance; in fig. 2 - the same plan view; in fig. 3 is a section A-A in FIG. 1, the working body - box; in fig. 4 is a section BB in FIG. in fig. 5 is a diagram of the provisions consistently occupied by the working body. The smoothing device contains a portal 1, on which On supporting and guiding rollers (not shown / installed is a working member such as a hollow beam 2, divided by the hedgehog 3) into uniform sections intended for filling with an inert mass (sand, concrete), as well as saving of metal on production in comparison with the known consuements.

The sectional construction of the beam when filling sections allows you to create

Specified specific pressure and provides the possibility of its change depending on changes in the parameters of the finishing process. At the same time, the sectional construction of the beam also ensures reliable distribution of the load, without allowing the inertial mass to move along its length during operation.

The mechanism for reciprocating movement of the beam 2 along the normal to the direction of smoothing includes an actuator 4, a crypipe 5 and a connecting rod b connected to the beam 2 and the crank 5 by means of hinge bearings 7. The mechanism for moving the working member in the direction of smoothing (oscillations of the beam in the horizontal plane) includes shaft 8 mounted parallel to the beam, connected to the drive 4. Right 9 and left 10 cams are eccentrically and in different directions fixed to the shaft 8. The actuator 11 is used for vertical movement of the working body relative to the smoothing surface of the product, which is in the form-trolley 12.

The beam 2 has a smoothing ski 13 installed under it, which is made with closed edges, a front horizontal part and a rear part, made with a slope of 1-3 to the horizontal.

Installing pivot bearings ensures reliable operation of the device when converting the rotational movement of the crank 5 into reciprocating movement of the beam 2, in combination with the oscillations of the latter in the horizontal plane from engagement with the cams 9 and 10 of the shaft 8.

The operation of the device is as follows.

When moving form-trolley 12

5, the vertical movement mechanism 11 brings the working body 2 into contact with the concrete mixture in the mold. At the same time, the actuator 4 of the reciprocating and oscillating movement of the working member is activated. With the rotation of the shaft 8 and the movement of the crank mechanism 5, b each -. One of the eccentric cams 9 and 10 alternately comes into contact with the side wall of the beam 2, shifting it by a predetermined amount towards the movement of the mold with the mixture.

Upon further rotation of the shaft 8, the left cam-eccentric 10 begins to shift the left end of the box in the horizontal plane (the contact of the beam 2 with the cam 9 is broken to the maximum offset of the left end of the box against the direction of smoothing when turning the crank 5 by 90). The bar 2 reaches the new middle position. The bar is shifted as far as possible to the left along the normal to the direction of smoothing. Then the right cam 9 comes into contact with the cannon box, the cant-bar contact 10 is broken, shifting hectare maximally in the horizontal plane against the direction of smoothing the right end of the box through 1/4 of the crank rotation (90 °), and again straining the bar, to the middle position after another 1/4 of the crank rotation corresponding to the initial position The eccentricities of the cams are equally pointed to 180 degrees to a friend, and with crank 5, they are connected in such a way that the working member is more powerful: t is the maximum speed of translational movement at the minimum speed of movement of the end of the beam during oscillatory movement. If the specified ratio of the speeds of the reciprocating and oscillating movements of the working body is combined with the forward movement of the product, a high quality of smoothing is achieved due to the change in the duration and magnitude of the impact of the working body on the concrete surface being processed. The number of oscillations of the working member is taken to be twice as large as the number of strokes of the forward movement of the beam. The eccentricity value of the cams is chosen so that the magnitude of the displacement of each end of the beam does not exceed half the angle of displacement of the hinge bearing of the reciprocating drive rod. The proposed device allows for improving the surface quality by changing the trajectory of movement of the working member.

Claims (2)

1. A COOLING DEVICE containing a portal with a smoothing working element in the form of a hollow beam mounted on it with the possibility of vertical movements, having a connecting rod-crank mechanism with a reciprocating movement drive, characterized in that, in order to improve the quality of the product, it is equipped with a parallel installed beam and kinematically connected to the drive of the reciprocating movement of the shaft with eccentrically and multidirectionally fixed cams interacting with the side wall of the br a whisker, and the connection of the connecting rod with the beam and with the crank is made in the form of spherical bearings. 2. The device according to claim 1, including it with the fact that it is equipped with a removable smoothing ski installed under the beam, made with curved edges, with the front part of the ski horizontal and the rear at an angle of 1-3 to the horizontal while the beam is made. sectional. m * * m Joint venture