Mechanical watch with two tourbillons

Abstract

The invention discloses a mechanical watch with two tourbillons, which comprises a winding system, a drive system, a display system, a shifting needle system, a transmission gear train, a differential gear train and two tourbillon gear trains; a cover plate which is connected with a main clamping plate is adopted as a beachmark, the mechanical watch is divided into an upper layer and a lower layer; the winding system, the drive system, the shifting needle system and a drive part of the display system are arranged on the lower layer, and the tourbillon gear train, the transmission gear train and a display part of the display system are arranged on the upper layer; and the upper and the lower layers of the mechanical watch are connected with each other through the differential gear train into a whole. The mechanical watch has the advantages that: two identical driving gears on barrel which are serially connected with each other are divided by two coaxial tourbillons which are horizontally arranged into an upper and a lower layer, the two driving gears on barrel are connected with each other through a differential system which is provided with a jewel bearing, and the size of the two driving gears on barrel are maximized to obtain the maximum driving torque and the maximum winding length so as to provide energy to a balance and hair spring system and to prolong the time traveling length of the machine core. In addition, the size of an outer balance wheel is maximized, so the rotation inertia is increased, the time traveling precision of the watch is improved, and the time of the watch is more correct.

Description

technical field [0001] The invention relates to a mechanical watch with double tourbillons, in particular to a mechanical watch in which a prime mover, a transmission mechanism and a tourbillon are layered. Background technique [0002] The so-called tourbillon in mechanical watches is a device that reduces isochronous errors. The feature of this device is that the balance spring system and escapement mechanism are placed in the frame, which can rotate with the frame while running on its own. It minimizes the position error of the clock caused by the gravity of the earth and thus improves the accuracy of travel time. Among them, the device that coincides the axis of the balance spring system with the rotation axis of the frame (refer to the patent "Coaxial Rotary Escapement Speed ​​Regulation Mechanism for Watches" - Patent No.: LZ200720096902.5) is called "Coaxial Tourbillon"; The device usually called "Carrousel" (refer to EP Patent Publication No. 846987) whose axes do n...

AI Technical Summary

Problems solved by technology

[0004] According to the structural characteristics of the double tourbillon, the problems that need to be paid attention to are: first, the characteristic of the differential mechanism introduced according to the mechanical principle is that it can not only decompose the movement but also synthesize the movement, so it can be used to combine the driving system, display system, transmission The system and the two tourbillons are well connected together to form a complete movement, but its disadvantage is that the efficiency is relatively low, that is, more energy is consumed; secondly, the maximum driving torque provided by the driving system for the double tourbillon will be It is far greater than the maximum torque required to drive a single tourbillon, which determines that the thickness of the mainspring inside the barrel must be increased to make the maximum output torque meet the requirements for driving a double tourbillon when the size of the movement is fixed. The disadvantage is that the reduction in the length of the mainspring makes the length of the watch shorter

Although this structure puts the tourbillon and the barrel wheel in the upper and lower layers without affecting each other, and the barrel wheel can be enlarged as much as possible to increase the torque and duration, but the implementation of this patent is to set the two tourbillons in the same position. While rotating on the rotating disk, it also revolves around the axis of the movement. The whole structure is a large planetary mechanism. The disadvantage is that driving this mechanism will consume more input torque, and its setting needle system needs to drive the entire turntable mechanism including The tourbillon and the transmission mechanism can make the hour wheel and the minute wheel rotate quickly and drive the hour and minute hands to rotate to adjust the time. The disadvantage is that the load driven by the hands is too heavy and it takes too much torque

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