SU1323786A1 - Ratchet-and-pawl freewheel clutch - Google Patents

Abstract

The invention relates to the field of engineering. The aim of the invention is the novelty of load capacity. The clerical mechanism consists of located 2 ff of the partly storage wheel 1 and the holder 2 with the projections 3 on the inside surface. The inclined side surfaces of the 4 protrusions 3 are arranged at an angle to the radius passing through its top 5, and the supports 6 are movably mounted on them. To the two adjacent lateral faces 7 and 8 of the supports 6, smallpox 9 dogs 11. are spring loaded against the ratchet wheel. When the ratchet wheel I is mounted, its teeth interact with the pawls 11. Which self-align under the action of reinforcements attached to them and ensure that the turn is turned on the clip 2. Each pawl 11 and the support 6 are evenly loaded. 2 Il. 6 10 9 (Л 11 со ts3 оо 00 05

Description

The invention relates to mechanical engineering and can be used in pulse variators, machine tools, etc.

The purpose of the invention is iioBbiuienHc load capacity.

FIG. 1 schematically shows a ratchet; in fig. 2 - the same, option.

The free-wheel creeping mechanism consists of concentrically located ratchet wheel H and a yoke 2 with wedge lugs 3 on its inner surface, the sloping side surfaces 4 of which are angled to the radius passing through its vertex 5. On the sloping side surfaces 4 evenly but the circles are movably movable along them; 1e of the support 6. On two adjacent side surfaces 7 and 8 of the supports 6 are the axes 9 of the dogs 10, which are spring-loaded to the tooth of the ratchet wheel. The axes of the 9 dogs are pressed against the support of 6 elastic elements 1 1 located between axes 9 and the sleeve 2.

The resultant coupling reactions, excluding frictional forces from the side of the movable supports on the yoke, should be relative to the yaw rotation axis. This can be achieved by various options for making the side surfaces of the protrusions and supports. The resultant R communication reactions on the side of the movable supports on the clip, without taking into account friction forces, are directed along the normal to the corresponding lateral surfaces and have a shoulder relative to the axis of rotation of the clip (Fig. 1). .

According to FIG. 2, each movable support 6 is mounted on two lateral nodes of the protrusion, which may be curvilinear or straight-line (Fig. 2) at an angle to each other. Equivalent R coupling reactions on the side of the movable supports on the padding, without taking into account friction forces, also have a shoulder relative to the axis of rotation of the yoke.

Ratchet freewheel works as follows.

When rotating the ratchet wheel 1 clockwise, one of the dogs 10 first comes into contact with the tooth of the ratchet wheel. Its axis 9 under the action of a force from the ratchet wheel pushes the two corresponding movable supports 6. These movable onors 6, moving in different directions, cause the movement of the remaining dogs 10 until they contact them with the teeth of the ratchet wheel 1. After all the dogs 10 will engage snatch teeth.

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1. The movement of them relative to the holder is stopped and the torque is transmitted from the ratchet wheel 1 to the holder 2. All dogs participate in the work, since equally effective coupling reactions from the movable supports to the holder have a shoulder relative to the axis of rotation of the holder, torque is transmitted to the yoke by each movable support. When the ratchet wheel I rotates counterclockwise, free running occurs, during which the elastic elements 11 return the axles 9 of the dogs 10 and the movable supports 6 to the initial position.

According to FIG. 2, the movable supports make relatively flat a-parallel movement with respect to the holder. At high wedging speeds, the movable supports move relative to the yoke with acceleration. The forces of inertia arising from this. Have a significant effect on the distribution of the load between the dog. From this point of view, the plane-parallel movement of the supports relative to the yoke may be preferable.

In the proposed design of the freewheeling ratchet mechanism, the torque is transmitted to the clip by each slide bearing. Therefore, the load is equal. The measurement is distributed to all the movable supports, the dogs and the axles of the dogs. As a result, the load capacity, reliability and durability of the mechanism are increased.

Claims (1)

Invention Formula Ratchet. A free-wheeling mechanism containing a concentrically arranged ratchet wheel and a clip with a clip on the inner surface, uniformly placed around it around the movable supports, on inclined adjacent side surfaces of which are axes of spring-loaded dogs interacting with the ratchet wheel and elastic elements that bind the axes of the dogs with the yoke, while the side surfaces of the wedge lip of the yoke are arranged at an angle to the radius, passing through its vertex, characterized in that By varying the load capacity by transferring the torque to the holder with each movable support, additional analogous wedge projections are made evenly around the circumference, and each movable support is placed at a minimum on one of the inclined side surfaces of the wedge. L. R five