SU1414994A1 - Gear - Google Patents

Abstract

The invention relates to mechanical engineering, to gears with a selection of gaps in the mesh. The goal — to expand the kinematic capabilities of the gear and increase its load capacity — is achieved by increasing the range of movement of the radially movable teeth and allowing them to be mounted along the matching wheel. Removable teeth 3 in the form of radial plates with symmetrical trapezoidal recesses 4 form a ring gear and are mounted on the hub, which consists of short two coaxial disks 1 and 2. On disks 1 and 2, there are conical rings 6, 7, which are sliding and fixed with nuts 10, 11. The disks 1, 2 are also mounted on the shaft 14, have internal conical surfaces 12 and screws 13. The radial grooves 15 can be made at the ends of the rings 6, 7, and the wheel can be fitted with wedge-shaped in the face section of the wheel 16 placed between adjacent teeth 3 and in the grooves 15 of the rings 6, 7. The inserts 16 in the areas closest to the center of the wheel have protrusions in the circumferential direction of the wheel to interact with the inner cylindrical surfaces 8 of the rings 6, 7. When sampling gaps in engagement with the matching wheel, they weaken tightening the nuts 10, II and screws 13. The relative movement of the rings 6, 7 and the disks I, 2 along the axis simultaneously move the teeth 3. At the same time, the conical surfaces of the rings 6, 7 and the disks 1, 2 interact with the corresponding surfaces of the notches 4. In the presence of inserts 16 at a time Ke nuts 10, II and screws 13 inserts 16 are sunk to the center of the wheel, increasing the rigidity of the mounting teeth 3. By adjusting the position of the rings b, 7 along the axis and due to the elasticity of the jumper, the m 3 incline the teeth m 3. 1 hp f-ly, 2 ill. (L 4 CO; o

Description

The invention relates to mechanical engineering and can be used in backlash-free gears.

The purpose of the invention is to expand the kinematic capabilities of a gear and increase its load capacity.

The positive effect is achieved by increasing the range of movement of the radially moving teeth and the possibility of installing them along a matching wheel.

FIG. 1 shows a gear; in fig. 2 shows section A-A in FIG. I. The gear wheel contains a hub made of two coaxial disks 1 and 2. Radially movable teeth 3 are mounted on the hub. The latter are serie plates in the form of radial plates placed in axial planes of the wheel. metric trapezoidal grooves 4 at opposite ends. The tooth 3 is in contact with each other along n; i-axis m 5, which is also axial. Notch 4 reversed. one to each other with small trapezium bases. The surfaces of the seam 4 are conical with the generators, which are the sides of the trapezium, and the axis coinciding with the axis of the wheel. The wheel also includes a device for moving the teeth 3 in the radial direction. This device is made in the form of two concentric and axial; movably mounted on the corresponding I I disks 1 and 2 of the hub between it; and a ring of rings 6 and 7 with internal I cylindrical surfaces 8 and external working conical surfaces 9. The conical surfaces of 9 rings, 6 and 7 face each other with cones. Rings 6 and 7 are screwed to one another by a threaded joint, made in the form of two mounted on the corresponding disks I and 2 on the side of the outer ends of the rings 6 and 7 of the nuts 10 and 11. On disks 1 and 2, internal working tapered surfaces 12. The cones of the surfaces 12 of the disks 1 and 2 are oppositely directed. The disks 1 and 2 are threaded with a screw connection, for example, screws 13. The conical surfaces of the recesses 4 are designed to interact with the corresponding working conical surfaces 9 and 12 of the rings 6 and 7 of the disks 1 and 2. The wheel is mounted on the transmission shaft 14. Radial grooves 15 can be made in the gear wheel on facing ends of rings 6 and 7, and the wheel is provided with inserts 16 placed between the teeth 3 and in grooves 15 of rings 6 and 7 in the face section of the wheel 16. Wedge inserts 16 are directed to the center of the wheel, and for every m of them

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in the direction perpendicular to the axis of symmetry of the wedge, the projections 17 d; 1 interact with the internal qi. The surface is 8 rings 6 and 7.

The gear wheel works as follows.

In the initial position, the rings 6 and 7 and the disks 1 and 2 are fastened with nuts 10 and II and screws 13, respectively, which ensure the contact of the teeth 3 with each other but planes 5 and their rigid fixation due to the interaction of the conical surfaces 9 and 12 of the rings 6 and 7 and disks 1 and 2 with conical surfaces of the grooves 4. In this case, the rings 6 and 7 are elastically deformed in the radial direction.

When on: 1, the liners 16, due to the interaction of their protrusions 17 with the inner cylindrical surface 8 of the rings 6 and 7, radially move to the center of the wheel and clamp their wedge surfaces at an angle of vertex and tooth 3, thereby increasing the rigidity of the structure.

If it is necessary to choose a gap in engagement with a sonram, a wheel (not shown) loosens the tightening of screws 13 and nuts 10 and 11. By mutual relative movement of rings 6 and 7 and disks 1 and 2 along the wheel axis, all teeth 3 are moved simultaneously. radial direction until the complete backlash sampling in the chain. The teeth 3 are moved by the interaction of the conical surfaces 9 and 12 of the rings 6 and 7 and the discs 1 and 2 with the conical surfaces of the notches 4. After the gaps are engaged in the engagement, the teeth are fixed in the indicated order (tightening the threaded connections). The design allows teeth 3 to be set along the mating wheel (not shown) even if axles are non-parallel. To do this, the tooth 3 is turned at an angle p (Fig. 1) by tightening the rings 6 and 7 with nuts 10 and 11 to one side or the other due to the flexibility of the part of the plates of the teeth 3 located between the strips 4. This increases the contact spot , i.e. increases the load capacity of the wheel.

Claims (2)

1. A gear containing a hub, a crown mounted on it with radially movable teeth, and a device for moving the latter in the form of two concentrically and axially mounted on the hub between it and the crown of rings with internal qi, indriches and external workers. there are conic surfaces, the 1CM1 conical surfaces face each other with the vertices 1), and the rings are threaded with a connection that differs:,; that. in order to expand the kinematic possibilities by increasing the range of movement of the teeth and increasing the load capacity, the hub is made of two coaxial and threaded connections of disks with internal working conical surfaces facing each other, the tops of the cones of the latter are oppositely directed, the rings are installed on the corresponding disks, the threaded connection of the ring is made in the form of two nuts installed on the corresponding disks from the outer ends of the rings, the tooth is ed mnye as arranged in axial planes of the wheel radial plates with symmetrical trapezoidal recesses on opposite end faces, the recesses facing each other small bases trape0 five the trench surfaces are conical with the generators — the sides of the trapezium and the axis coinciding with the axis of the wheel, designed to interact with the corresponding working conical surfaces of the disks and rings. 2. The gear wheel according to claim 1, which is characterized by the fact that radial grooves are made on facing ends of the rings, the wheel is provided with inserts wedge-shaped in the face section of the wheel located between the teeth and in the grooves of the wheel, and In each of the contributions in the direction perpendicular to the axis of symmetry of the wedge, protrusions are made to interact with the inner cylindrical surface of the rings. 17 13 wasp eight five U2.1