SU1247243A1 - Floor grinding machine - Google Patents

Description

2. The machine according to claim 1, characterized in that it is provided with an arrangement on its sides in addition

The invention relates to machine building, construction and can be used to create equipment intended for the treatment of concrete, polymer cement and other solid monolithic floors in buildings and on platforms.

The purpose of the invention is to increase the productivity and quality of processing by regularly adjusting the direction of movement of the machine by braking leading wheels and shortening the time for changing the direction of movement of the machine by turning all the wheels.

FIG. 1 shows a diagram of the movement of the machine on the treated area of the floor; in fig. 2 - machine, plan view; in fig. 3 - the same, side view; in fig. 4 shows section A-A in FIG. 2; in fig. 5 - control algorithm; in fig. 6 is a schematic diagram of a machine control system.

When grinding the floor, the machine is mixed along a zigzag trajectory 7 with a step of 6 equal to or slightly less than the width / grip of the working member, and an amplitude C equal to the value of the longitudinal movement of the machine, i.e. in one longitudinal passage, the machine is displaced in the transverse direction by a distance not exceeding half the working width of the tool member. Such a trajectory is obtained by alternately reversing the course of the machine with the turn of all the running rings by angle Ы. either one or the other away from the neutral position. The magnitude of the angle o / is determined from the expression:

Y

arctg

21

To eliminate possible gaps of the raw surface between adjacent passages, the angle of rotation of the wheels on the machine is adjusted to a value slightly smaller than the calculated one.

travel switches connected via the control unit with the actuator to turn the wheels.

The machine comprises a frame 1 of a self-propelled trolley 2 with traveling wheels 3-6, on which a grinding head 7 with an actuator 8 is mounted. For lifting

the winch 9 serves as a grinding head when replacing grinding wheels and crossings.

The travel wheels 3–6 are connected with gear motors 11 through bevel gear pairs 10. Electromagnetic brakes 12 are coaxial with travel wheels.

If the design of the wheel drive contains irreversible gears, for example, worm gearboxes with a large gear ratio, special brakes are not required. They are not required even when engines with

0 built-in electromagnetic brakes.

The running wheels rotate around vertical axes by means of levers 13-16, connected in pairs between

5 by means of transverse rods 17 and 18. By levers 19 and 20, transverse rods are connected with the actuators 21 and 22 of the device for turning the traveling wheels. Dp adjusting value

0 the angle of rotation of the levers 19 and 20, and consequently, the angle of rotation of the traveling wheels 3-6 are the adjusting screws 23-26. The front and rear of the machine are track switches 28-30,

5 and lateral directional switches 31 and 32. A control unit 33 is mounted on the trolley.

The area to be treated is enclosed by the longitudinal movement limiters 34 and U5 of the machine and the transverse movements limiters 36 and 37. The machine works as follows. When the track switches, for example, 27 and 28 (see Fig. 1), reach the limiter 34, the machine stops and the wheels turn by angle ы. to the opposite (left) side of

3

neutral position and reverse. When the switches 35 and 30 reach the limiter 35, the machine will stop again, the wheels will turn in the opposite (right) direction and the machine will start to move to the limiter 34. Then the cycle repeats.

In order to reduce the deviations of the machine from the translational movement, the grinding head is placed in the center of the frame, in which the center of gravity of the machine must also be located. It is advisable to drive all the wheels, since with one driving axle a moment occurs that deflects the machine from the specified direction of motion. Thanks to the all-wheel drive, it is possible to adjust the trajectory of the car. If the machine deviates from the forward movement, the paired switches 27-28 or 29-30 will not simultaneously reach the corresponding longitudinal limiter. The track switch, through the timing of the side, the first to reach the longitudinal travel limiter, will cause the drive motors to turn off and the leading side wheels to brake, and all wheels to be switched to neutral attachment; at the same time, the machine will turn at a certain angle, and the lagging switch of the side will even reach the longitudinal limiter. After which the wheels turn to the angle from / to the neutral position and start moving in the opposite direction.

When the side switch 32 reaches the lateral displacement limiter 37, the travel wheels are rotated from in the opposite direction, i.e.

Oh oh

0

472434

at an angle of 2 oL without stopping the machine. Now, with the limiters of the longitudinal displacements, the wheels will turn in opposite directions as compared with the previous passage, and the machine will have the opposite transverse displacement, i.e., the grinding of the surface to be repeated. When (Achievement by the switch 31 of the opposite limiter 36 again changes the direction of the transverse movement of the machine to the opposite. Further, the looping cycle can be repeated if necessary.

The machine control algorithm (FIG. 5) with the block diagram of the control system shown in FIG. 6 is implemented as follows.

After installing the machine in the same position, the position in the initial conditions block sets the initial direction of movement and the number of passes. There you can also set the angle d of rotation of the wheels. After that, the machine is started. Signals from sensors 27-30 through the block

five

0

five

matching, ensuring system operability at different operating levels of sensors and the rest of the circuit, is transferred to the storage register. Similarly, the signals from sensors 31 and 32 are recorded in the corresponding triggers. Depending on which sensor, 31 or 32, has worked, the descrambler works for forward or reverse. In this case, the appearance of a signal at one of the outputs of the decoder is determined by the code recorded in the register, i.e. triggered sensors 27-30.

The generated commands depending on the register code are shown in the table.

Stop the left side, turn the wheels to neutral from the right position

Stop the right side, turn the wheels to neutral from the right position Stop the machine, turn the wheels at an angle - oi (left), reverse movement, set the register to the zero state

4 O O 101 O

5-0 O O 1 1 O

600 1 1 1 About

71 0000 1

80 1 0001

91 1 000 1

100 O 1 00 1

11 About About 0101

12 O 0110 1

Each time the sensors 31 and 32 are triggered, a unit is subtracted from the pass counter; setting it to zero state indicates the end of work. This triggers and the signal to stop the machine enters.

The rotation of the wheels of such a machine is appropriately carried out from two actuators. In this case, the wheels are connected to each other with a lever honey. Stop the right side, turn the wheels to neutral from the left position

Stop the left side, turn the wheels to neutral from the left position

Stopping the machine, turning the rotation of the angles + oL (right), reversing the movement, setting the register to the zero state

Stop the left side, turn the wheels to neutral from the left position

Stop the right side, turn the wheels to neutral from the left position

Stopping the car, turning the wheels at an angle of + c, reversing the movement, setting the register to the zero state

Stop the right side, turn the wheels to neutral from the right position

Stop the left side, turn the wheels to neutral from the right position

Stopping the car, turning the wheels at an angle, reversing the movement, setting the register to the zero state

In this case, in the automatic mode of operation of the machine, the actuators operate synchronously, ensuring that all the wheels turn to one side.

In order to ensure high maneuverability of the machine in the manual control mode, it is necessary to provide for the possibility of the simultaneous rotation of all wheels - for diagonal movement.

the ability to rotate the wheels of one axle in the opposite direction with respect to the wheels of the other axle - to move along a small radius curve. In addition, one should not exclude the possibility of turning the wheels of only one axis - to move along a curve of a large radius.

The proposed machine is simple in terms of structure, as it includes four identical gearmotors, a frame and two identical actuators for turning the wheels. Control system can be done 472438

yen on 12 chips of medium integration. Non-contact limit switches can be used as sensors, for example, type 5 KVD-6M.

Using the proposed machine, by eliminating complex maneuvering research institutes at the end of each stroke, associated with turning the entire machine, grinding performance is improved, and by retracing the processing marks with a constant angle, the quality of the treated surface is improved.

28

27

X

, -I "7

15

18 16

1247243

5N,

-X-) O

V X.

FIG. V

ut 5

Jj

W cm, „b

2) L (2

Pezucmp storage

f f f f

Deshi Rator

$, deshi rrato}. I

t

f f f f yy

W (t f f f

Controlled (/ e when pr -Manage when

Mom schzhenii reverse ffdu (transverse)

Editor Nedoluzhenko

Compiled by N. Ermakova

Tehred-O.Sopko Proofreader G. Reshetnik

Order 4061/17 Circulation 740. Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

domm / kof block

N f f f f f f

GflOK

Hai / olsh conditions

2) L (2СЖ |

f

LI

-one

CvemvuK npO} fodoS

f N f f

GK

Stop

Ozig.b

Claims (2)

1. MACHINE FOR FLOOR GRINDING, comprising a self-propelled trolley with running wheels and actuators for driving and turning wheels, a grinding head located on the trolley, as well as an automatic trolley control system including a control unit and directional switches connected through the control unit to the executive wheel drive mechanism, characterized in that, in order to increase productivity and processing quality, it is equipped with wheel brakes, while all wheels are mounted with the possibility of rotation, and put New switches are located in pairs in front of and behind the trolley symmetrically with respect to its longitudinal axis and are individually connected via the control unit to the brakes of its side and in pairs to the actuator for turning the wheels. 2. Machine by π. 1, characterized in that it is equipped with additional directional switches located on its sides, connected by a control unit with an actuating mechanism of wheel rotation.