SU1218195A1 - Jaw overrunning clutch - Google Patents

Description

"

The invention relates to a machine structure and can be used for installation on drive axles of children's cyclists.

The purpose of the invention is to increase the reliability of the coupling.

FIG. 1 shows the clutch, the view | FIG. 2 is a section A-A in FIG. 1; in fig. 3 - spring, general view; in fig. 4 - the position of the coupling elements during the working stroke | in fig. 5 - the sequence of movement of the dog at idle.

The clutch contains concentrically located coupling half leading 1 and driven 2. The driving half coupling is made with ratchet teeth 3 on the inner surface. Ratchet teeth have working surfaces 4 and inclined surfaces 5, the latter parallel to the tangents to the outer surface of the driven coupling half 2, Driving coupling half 2 has slots 6 in which the dogs 7 and the sleeves 8 are located. The sockets 6 have the shape of an equilateral trapezoid with a smaller base 9 facing the oz: - the couplings, and the side surfaces 10 of the trapezium are located in the radial planes of the Dog 7, made in the form of a straight trapezium, the working surface 11 of the dog made to the edge of the trapezium 12; an oligonous edge of a melgutz working 4 and an onhlong 5 surfaces ::. toothing 3, The supporting surface 13 of the dog is perpendicular to its side of the dog. Springs 8 are curved, two of the two petals 14 at an angle meet each other. At the same time, the distance between the cylindrical lintels of the cylindrical bridge and the distance between the end points of the bridge is smaller than the lintel diameter. Petals of the spring are installed from the working surface 11 dogs and jumpers from the supporting surfaces of the 13 dogs. The flanges I6 close the coupling from the ends and are fixed on the driven coupling half.

952

The depth of the socket H must not be less than the sum of the width of the dog h and the outer diameter d of the cylindrical lintel of the spring V

 The clutch works as follows.

When the leading half coupling 1 rotates in the clockwise direction of the pawl 7 pushed by the springs 8 to the inclined surface 5 of the ratchet tines 3, engages with the working surfaces of the 4 teeth and is fixed in this position due to the acute angle of the pawl and the corresponding sharp the angle between the surfaces of the ratchet teeth. The bearing surface 13 of the pawl rests on the side surfaces of the socket 6 and transmits the torque to the driven coupling half 2.

When overtaking, the transmission of torque does not occur because the inclined surfaces of the 5 ratchet teeth squeeze the dogs that enter the slots 6 and come out of the Lenin hook with the ratchet teeth 3 of the half coupling 1, the Floating dog constantly apply to the ratchet tooth m. When transmitting the torque of the doggie; go fc in fixed

the position between the working and inclined surfaces of the ratchet teeth and the lateral surface of the socket of the half-coupling 2, which causes the occurrence of forces acting on the skin from the side of the pawl 8.

The absence of any hinge knotsJ curved surfaces of a complex profile determines the reliability of the coupling during operation,

The shape of the spring increases both reliability and service life. The increase in service life is due to the fact that the deformation occurs in two places at the ends of the converging petals. In the clutch, the dogs are mostly compressed, and the contacting surfaces are flat, which eliminates the cutting of dogs, the formation of defects on the contacting surfaces and contributes to reliability,

sixteen

13

fizl

7

 8 cpus.6

Claims (1)

A ratchet overtaking clutch, containing concentrically located half-couplings, on one of which ratchet teeth are made, and on the other - nests and dogs and springs placed in them, pressing the dogs to ratchet teeth, characterized in that each spring is used to increase reliability made in the form of two petals located at an angle to each other, the converging ends of which are connected by a jumper of cylindrical shape, while the distance between the converging ends of the petals is less than the diameter of the jumper, and installed by the petals the working surface of the dog, and the jumper on the side of its supporting surface, the nest is trapezoidal in shape, the smaller base of the trapezoid faces the axis of the coupling, its side surfaces are located in radial planes, and the supporting surface of each dog is perpendicular to its side faces. L G <rig.]