SU1451375A2 - Rack-and-gear mechanism - Google Patents

Description

four

SP

coke

ten

The invention relates to mechanical engineering and is an improvement of the device according to the authors. St. No. 1200039.

The purpose of the invention is to increase durability by reducing friction forces in the guide bases.

FIG. Figure 1 shows the kinematic diagram of a gear-rack mechanism; in fig. 2 is a view A of FIG. one.

The rack-and-pinion mechanism contains parallel racks 2, 3 and 4 mounted on a fixed base 1. Toothed racks 2 and 3 rigidly connected by a cross bar 5 and 3 and toothed rack 4 are capable of mixing in series or simultaneously in opposite directions under the action of power drives, for example, pneumatic cylinders 6 and 7, fixed on a fixed base 1. In case 8, capable of mixing, run on rails 2 and 3, performed ush, they were guided by a free-standing vrash, an axial shaft 9. 2Q On the shaft 9, teeth are rigidly fixed This wheel 10, meshed with the rack 4, and the gears having the same delira coincides with the direction of movement of the rack 4, and turns it and gears 11 and 12 that are rigidly connected to it with shaft 9 Gears 11 and 12 run in racks 2 and 3 , the case 8 peremeplyat in the direction opposite to the direction of the stirring, of the rail 4. The rack racks 2 and 3 interact with the gears 11 and 12, respectively, with the forces S and C, the direction of which coincides with the direction of movement of the rails 2 and 3. Forces p2 and Fy are equal in magnitude, since gears 11 and 12 are made equal ovymi.

According to the third law of Newton, the sum of the forces r1, and h must be equal to O,

by 15 then P-1 Pz - The sum of the moments of forces F, Fz- and fs relative to an arbitrary point O is equal to:

F, (A + B} -F2 (2A + B) -F3B F A + FtB- -2F 2A-F2B-F3B FiA + FiB-2fU-f B. -f, B-0

.B F A + FiB-F, AC

nor 11 and 12,

body diameters and meshed with rails 2

and 3, respectively, with gear racks. Thus, in the liquid2 mechanism, 3 and 4 are located on one side of 25 normal pressures on the direction of the shaft axis, and gears 11 and 12 are fixed on the Q side of the movable body, and the same distances from wheel 10 Driven by the forces arising in the grip. The gear-rack mechanism operates on the toothed racks with the wheel and gears. In the mechanism, this ensures a reduction in friction forces in the direction of the actuators 6 and 7, and consequently, durable ubchata rack 4 and rigidly connected to the transverse Nosta rack and pinion mechanism.

- - At return movement of laths 2, 3, 4

under the action of actuators 6 and 7, the forces Fi 2 and z change their direction,

BVJ D dniVJ 11 IJW I HY (L1 (L W TVnUl.A. N Clll | ./tJ JJt / JV lirjyj ... t .. 1

In this case, the rake 3 interacts with the 35 P body 8 and returns to the outboard with the wheel 10 with the force ri, the direction of which is the position.

By means of 5, the racks 2 and 3 move relative to the fixed base 1 in mutually opposite directions.

-2fU-f B. -f, B-0

.B F A + FiB-F, AC

.one

Claims (1)

TOOTH-RACK MECHANISM, by ed. St. No. 1200039, characterized in that, in order to increase durability by reducing friction in the guides, the mechanism is equipped with an additional gear similar to the main one, located symmetrically to it with respect to the wheel and rigidly mounted on the shaft, additional guides placed at the base, and an additional rail mounted parallel to two rails on the same side of the axis of the shaft in additional guides and rigidly connected to the rack, interacting with the main gear. b