SU765574A1 - Reversing device with automatic switchover - Google Patents

Description

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The invention relates to mechanical engineering, B particular to mechanical combined gears, and can be used in automation devices.

A reversing device is known, comprising a housing, a drive shaft housed therein, a driven shaft kinematically associated with it, and a switching mechanism (IJ.

The disadvantage is that the support mechanism of the switching mechanism is self-aligning, and its support arms are spring-loaded along the axis of the support towards one another.

The closest in technical essence to the present invention is a reversing device with automated switching, comprising a housing, a drive shaft housed therein with a conical bristle rigidly fixed thereto, a bushing shaft mounted perpendicular to the drive coupling having a two-way coupling half located on the driven shaft with the possibility of reciprocating movement along it, a spring-loaded slider, freely mounted on a two-sided coupling half with the possibility of translational moving to

the casing is parallel to the shaft axis, the switching mechanism and two bevel gears, freely mounted on the shaft of the shaft with the possibility of periodic interaction with the drive shaft gear, through the switching mechanism and the clutch (2).

The drawback of the device is the complexity of its design, since the switching mechanism is made in the form of a bracket with a finger rigidly connected to the slider and clutch (O-wedge cut-outs on gears and a linkage system, connecting gears and a slider.

The purpose of the invention is to simplify the design.

This goal is achieved by

15 a reversing device with an automated switching, comprising a housing, a drive shaft accommodated therein with a bevel gear rigidly fixed thereto, a driven shaft mounted perpendicular to the drive, a clutch including a double-side coupling half located on the driven shaft with the possibility of reciprocating movement along it, a spring-loaded slider, freely mounted on a two-sided coupling half, with the possibility of translational movement in the housing parallel to the shaft axis, the switching mechanism and two bevel gears, freely mounted on the driven shaft with the possibility of periodically interacting with the drive shaft gear by means of a switching mechanism and a clutch, the switching mechanism is made in the form of a cam rigidly connected to the end face of one of the wheels, and the slider is spring-loaded towards the cam and has the protrusion interacting with the cam.

FIG. 1 shows the proposed device, a longitudinal section; in fig. 2 - cam of the switching mechanism, external view.

The reversing mechanism contains a casing, a drive 2 and a driven 3 shafts, a bevel gear 4 and gears 5 and 6, a gear 4 is rigidly fixed on the drive shaft 2, and the two wheels 5, b are aligned coaxially with each other, engage mounted on the driven shaft 3 and alternately connected with it by means of interaction with the wheels 5 and 6 of the clutch 7, the two-sided half coupling 8 of which freely moves along the driven shaft along the key 9 and contains a freely mounted slider 10 entering with the housing 1 moving in In the direction, the spline joint is spring loaded 11. The switching mechanism of the device is made in the form of a cam 12 rigidly connected to one of the bevel gears 5 or 6 of the shaft 3 and consisting, for example, of two symmetrical sections 13 and 14, displaced relative to each other in the longitudinal direction is greater than or equal to the course of the movable two-sided coupling half 8 and transition zones 15 J 16 between them. BhtcTyn 17, is made on the slider 10 on the opposite side of the spring 1 and interacts with the cam 12 of the switching mechanism.

The device works as follows.

At the time of operation (see FIG. 1), the rotational transmission from the drive shaft 2 to the driven shaft 3 occurs through gear 4 and a bevel wheel 6 to a double-side coupling half 8, since the working portion 13 of the cam 12 pressed the slider 10 through the protrusion 17, overcoming the spring resistance II, and thus closed the left side of the clutch 7 clutch.

Upon further rotation of the drive shaft 2, the working track 13 of the cam 12 will run along the protrusion 17 until the latter, under the action of the spring 11, passes through the transition zone, for example zone 15, to the working track 14, i.e. the left side of the clutch 7 is opened and the right side is closed with gear 5. And since the wheels 5 and 6 are screwed in opposite directions, the driven shaft 3 will change its direction of rotation to the opposite.

With further unidirectional rotation of the driven shaft 2, the protrusion 17 will eventually interact with the transition zone 6 and B1 1 will go through it again to the working section 13, while the slider 10, having overcome the resistance of the spring 1, moves to the left and releases the clutch 7 from engagement and will close its left part, i.e. the direction of rotation of the driven shaft 3 will change again.

The further work process is similar. The reversal law is determined by the gear ratio between gear 4 and wheels 5 and 6. With a large gear ratio between these wheels in the device, the driven shaft will periodically change its direction over large periods of time (it is better to use a cup spring). To reduce friction in the mechanism, the protrusion 17 can be replaced with a flame support. To reduce the dead zone of the mechanism, transition zones 15 and

16 should be made steeper, and the stroke of the two-sided coupling 8 should be as small as possible.

This mechanism can ensure that the output shaft does not have the same time in opposite directions. For this, working sections 13 and 14 are performed on circular arcs of unequal each other. From the sprav of the thorough analysis of the known and foregoing mechanisms of many mechanisms, it is absolutely obvious that the latter is simpler in a constructive relation.

Claims (2)

Invention Formula A reversing device with automated switching, comprising a housing, a shaft driven in it with a bevel gear rigidly fixed on it, a driven shaft mounted perpendicularly leading, a clutch which includes a two-sided coupling located on the driven shaft with the possibility of reciprocating movement along it, a spring-loaded slider, freely mounted on a two-sided half coupling with the possibility of translational movement in the housing parallel to the axis in the la, the switching mechanism and two bevel gears, freely mounted on the driven shaft with the possibility of periodic interaction with the driving gear the shaft by means of a switching mechanism and a clutch, characterized in that, in order to simplify the construction, the switching mechanism is made in the form of: interacting with kul, h h com. Sources of information taken into account in the examination 1..Htortorsky certificate (SSR -M. .1 (Sh99, CL F 16 And 21/08. 1970. 2. Moskalenko V.A. Me.khansmzm. M., “L1ai1inostroenie, 1% 3, p. 76, FIG. 57 (prototype). phage /