CN2648477Y - Great wheel assembly of timing device - Google Patents

Abstract

The utility model relates to a great wheel component of a timing device, which consists of a great wheel shaft, a great wheel and a friction disk; a great wheel is arranged on the great wheel shaft; the great wheel is covered with the friction disk; a plurality of axial ribs are distributed uniformly along the circumferential direction on the great wheel shaft; the open slots with the same amount are arranged at the radial position of the friction disk. Not only can the great wheel component of timing device of the utility model be arranged conveniently, but also the structure between the friction disk and the great wheel shaft and the great wheel is more stable, thus leading to the produced timing device serviceable.

Description

A kind of great wheel assembly of timer

Technical field

The utility model relates to a kind of timer, relates in particular to the great wheel assembly of timer.

Background technology

Great wheel assembly in the timer is the core component of timer, is made up of great wheel axle, great wheel and friction disc.When the timer timing was rotated, friction disc should keep rotating synchronously with gear, when the manual timing of timer, between friction disc and the gear sliding friction was arranged, and promptly gear does not change, and great wheel axle and friction disc rotate.This requires the friction force between friction disc and the gear neither big nor small, and friction force is too big, and gear meeting and friction disc rotate together during timing; Friction force is too little, and during the timer timing, gear can not drive friction disc and rotate synchronously, and friction disc comes off easily.At present, the combination of the friction disc of the great wheel assembly of timer generally adopts pad to push down, this combination structural instability, and pad is pressed too deadly, is difficult to produce sliding friction between friction disc and the gear; Too loose, pad comes off easily; And assembling is complicated.

Summary of the invention

In order to solve above-mentioned technological deficiency, the purpose of this utility model is to provide in a kind of novel great wheel assembly friction disc stable with the integrated structure of axle, and easy for installation.

The great wheel assembly of the utility model timer, form by great wheel axle, great wheel and friction disc, on the great wheel axle great wheel is housed, be covered with friction disc on the great wheel, it is characterized in that on the great wheel axle, along the circumferential direction being evenly equipped with several axial raised lines, be provided with the open slot of equal number in the corresponding radial position of friction disc; The internal diameter of friction disc is slightly less than the diameter of great wheel axle; Between per two raised lines, can also be provided with a circumferential groove.

The utility model great wheel assembly is installed very convenient, at first the great wheel axle sleeve is contained in the middle of the great wheel, friction disc is enclosed within on the great wheel axle then, friction disc toward pressing down, because the rigidity of friction disc itself, the great wheel axle is provided with axial raised line, and the internal diameter of friction disc is more smaller than great wheel axle, so friction disc can firmly must be combined on the great wheel axle.The utility model great wheel assembly is not only easy for installation, and the structure between friction disc and wheel shaft and the great wheel is more stable, makes the timer of working it out have more durability.

Description of drawings

Fig. 1: the utility model great wheel modular construction synoptic diagram;

The A-A cut-open view of Fig. 2: Fig. 1.

Embodiment

Below by Fig. 1, Fig. 2, Fig. 3 an embodiment of the utility model great wheel assembly is described further.

Present embodiment great wheel assembly is made up of great wheel axle 3, great wheel 4 and friction disc 1, great wheel 4 is housed on the great wheel axle 3, be covered with friction disc 1 on the great wheel 4, on great wheel axle 3, along the circumferential direction be evenly equipped with 4 axial raised lines 2, be provided with the open slot 5 of equal number in the corresponding radial position of friction disc 1.During installation, at first great wheel 4 is enclosed within on the great wheel axle 3, then friction disc 1 is enclosed within on the great wheel axle 3 and also inwardly compresses into, because friction disc 1 adopts stainless steel to make, has certain rigid, great wheel axle 3 is provided with axial raised line 2, and the internal diameter of friction disc 1 is more smaller than the diameter of great wheel axle 3, is combined on the great wheel axle 1 so friction disc 1 can be firm, Stability Analysis of Structures between not only simple installation, and friction disc 1, great wheel axle 3 and the great wheel 4.

Claims (3)

1, a kind of great wheel assembly of timer, form by great wheel axle, great wheel and friction disc, on the great wheel axle great wheel is housed, be covered with friction disc on the great wheel, it is characterized in that on the great wheel axle, along the circumferential direction being evenly equipped with several axial raised lines, be provided with the open slot of equal number in the corresponding radial position of friction disc.

2, great wheel assembly according to claim 1 is characterized in that the internal diameter of friction disc is slightly less than the diameter of great wheel axle.

3, great wheel assembly according to claim 1 is characterized in that being provided with a circumferential groove between per two raised lines.

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