SU1252578A1 - Three-dimentional cam mechanism - Google Patents

Description

3. The mechanism according to claim 2, characterized in that, in order to control the speed by using controlled elements, the kinematic connection encompasses the follower

one

The invention relates to mechanical engineering and can be used for transmitting rotation in machines of various purposes. The area of predominant use is the borax technique.

The aim of the invention is to expand the kinematic capabilities of the mechanism by double conversion of the types of movement with reduction and regulation of the speed of rotation of the slave link. The load capacity of the mechanism is further enhanced by increasing the number of parallel power flows.

Fig, 1 shows a spatial cam mechanism; Fig, 2 - the same, with adjustable speed, longitudinal section; FIG. 3 is a section A-A in FIG. 2; in fig. 4 — mechanism in a two-step embodiment.

The spatial cam mechanism comprises a housing 1, wedges} 1st cam 2 with a closed sinusoidal groove 3, a pusher 4 with rolling bodies 5 placed at one of its ends interacting with a closed sinusoidal groove 3, a driven cam 6 with closed sinusoidal slots 7 and 8, with which additional bodies 9 and 10 of rolling interact, the cover thrust of the pusher 4 the sleeve 11 is kinematically connected with the housing 1 (in fig 1, this connection is rigid) and with the help of a spline connection with the pusher 4, the latter is made in the form of cams 2 and the sleeve 6 with the uniformly arranged on the circumference corresponding bodies 5, 9 and 10 rolling,

In the embodiment of the variable speed mechanism (FIGS. 2 and 3), the kinematic coupling of the sleeve 11 with the housing 1 is designed as a brake.

the bushings with the body are made in the form of a controlled brake, and the bush that covers the cams is spring-loaded relative to them in the axial direction.

five

12, and the pusher 4 made in the form of an overlapping sleeve cams, is spring-loaded relative to the cams 2 and 6 in the axial direction, for example, elastic-. Gimic elements 13 and 14.

Multistep arrangements are possible, for example, when two stages are connected in series (Fig. 4). Mutual centering of cams 2 and 6 can be carried out by a protrusion 15 of one cam entering the reciprocal hole of another cam, they can interact through a bearing 16

The closed sinusoidal grooves 3, 7 and 8 of the cams 2 "and 6 have the same amplitudes h h h (Fig. 1), but the number of waves of the sinusoidal grooves on the driving and driven cams is 0, 0 personally.

The spatial cam mechanism works as follows

When the driving cam 2 is rotated, the rolling element 5 interacts with the locking sine groove 3 and the pusher 4 drives the reciprocating oscillatory motion. In such a motion, the pusher bodies 9 and 10, interacting with the closed sine grooves 7 and 8, rotate the driven cam 6, the gear ratio of the mechanism is determined by the ratio of the numbers of waves of the closed sine grooves of the driving and driven cams,

In the embodiment of the mechanism shown in FIGS. 1, t, e, when the hub 11 is inhibited, the mechanism can operate in the mode of a reducer or multiplier.

The same modes are realized when the brake 12 is on (Figs. 2 and 3),

When the brake 12 is turned off, the speeds of rotation of the master and slave cams are the same and the mechanism works

five

0

five

in clutch mode. The presence of elastic elements 13 and provides a smooth transition from one mode of operation of the mechanism to another.

The invention allows the use of a 5-cam cam mechanism for transmitting rotational motion with a reduced speed and, consequently, expanding its kinematic capabilities as compared with

Zestny device, where the rotational cam movement of the cam is transformed into a forward movement of the pusher. In addition, in the proposed mechanism, the rotational speed of the driven cam is controlled, and its load capacity is increased by making the pusher in the form of a sleeve with several rows of rolling bodies.

12

eleven

3

Claims (3)

1. SPATIAL CAM MECHANISM, comprising a housing, a leading cam with a closed sinusoidal groove and a pusher with rolling bodies located at one of its ends, interacting with a closed sinusoidal groove, characterized in that, with the aim Figure 1 of the expansion of kinematic capabilities by double conversion of types of motion with speed reduction, n is equipped with a driven cam with at least one also closed sinusoidal groove and additional rolling bodies located on the other end of the plunger interacting with closed sinusoidal grooves of the driven cam. 2. The mechanism of claim. ^ Characterized in that, in order to increase the load capacity by increasing the number of parallel power flows, it is equipped _{with a} sleeve covering the pusher kinematically connected to the body and by means of a spline connection with the pusher made in the form of a sleeve covering the cams with rolling bodies evenly spaced along respective circumferences. SU ,, „1252578 3. The mechanism by π. 2, characterized in that, in order to regulate the speed by using -. of controlled elements, the kinematic connection of the sleeve covering the pusher with the housing is made in the form of a controlled brake, and the sleeve covering the cams is spring loaded from the carrier axially.