Gear transmission with end teeth

FIELD: machine building.

SUBSTANCE: gear transmission contains driven wheel, teeth (2) of which are implemented with plane work surfaces (3) and, drive wheel, teeth (5) of which are implemented with convex work surfaces (6), joined to plane work surfaces (3) by line of engagement, corresponding part "Pascal's limacon".

EFFECT: reliability growth ensured by accurate gearing of teeth.

2 dwg


The invention relates to gearing and may find application in the design of transmission mechanisms and devices for grinding materials.

Known gear with face teeth, containing a driving wheel with a concave working surfaces and follower wheel with a convex working surfaces, while the surfaces of the teeth of the driven and driving wheels are made mutually matched over the entire height of the teeth [1].

A disadvantage of the known transmission is the following. Research engagement gear with face teeth on patent RU 2011078 [1] shows that at a constant ratio of the transmission and at a given convex working surface of the tooth of the driven wheel on the driving wheel is impossible to obtain a concave working surface, i.e. it can be argued that gear with face teeth [1] does not exist in nature.

Research engagement gear [1] are carried out using theorem of Euler-Savary, graphical method Mobile, the main theorem gearingwherethe vector normal to the surface of the paired teeth at the point of contact;- relative velocity vector.

Known gear with face teeth, containing a driving wheel with working what again, which is a part of the surface of the Snail-Pascal", and the slave wheel with a flat working surfaces [2].

A disadvantage of the known transmission is low smoothness transmission of high velocity of rotation, as is made convex surfaces face the teeth of the drive wheel, represents a part of the surface of the Snail-Pascal", does not fully correspond to theoretical convex surfaces.

The problem solved by the invention is to increase the strength of the gear.

The technical result is to increase reliability by increasing the smoothness obtained by the exact meshing of teeth.

This technical result is achieved by the fact that in gear with face teeth, containing a driving wheel with a convex working surfaces of the teeth and follower wheel flat working surfaces of the teeth, what's new is that instead of the convex surfaces of the teeth, limited part of the surface of the Snail-Pascal" use the new convex surfaces of the teeth of the drive wheel, limited to curves, the mating flat surfaces of the teeth of the driven wheel through gearing represents part of a "Snail Pascal".

Figure 1 shows the proposed transfer; figure 2 is a section along a-a in figure 1.

Gear in front of the net assets, end teeth contains follower wheel 1, the teeth 2 which is made with a flat working surfaces 3, and a driving wheel 4, on which the teeth 5 with a convex working surfaces 6, the mating flat working surface 3 along the line of engagement represents part of a "Snail Pascal". The engagement of the teeth is confirmed by theorem of Euler-Savary.

Gear with face teeth works as follows. During the rotation of the drive wheel 4 teeth 5 are in engagement with the teeth 2 of the driven wheel 1 and impart rotary motion. Mutual contact of the working surface 6 and 3 occurs over the entire height of the face teeth with a constant gear ratio, on the surface of the mesh represents part of a family of Snails Pascal". As a result, the smoothness increases.

Sources of information

1. EN 2011078, IPC 5 F15H 55/08. Publ. 15.04.94. Bulletin no.7.

2. SU 506714, IPC 2 F15H 55/08. Publ. 15.03.76. Bulletin no.10.

Gear with face teeth, containing a driving wheel with a convex working surfaces of the teeth and follower wheel flat working surfaces of the teeth, characterized in that the convex surfaces of the teeth of the drive wheel is made of the mating flat surfaces of the teeth of the driven wheel through gearing represents part of a "Snail Pascal".


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