Double-lever interlocking change-over mechanism and method for automatic watch

Abstract

The present invention relates to the manufacture of watch. The double-lever interlocking change-over mechanism consists of gear, double swing links, ratchet wheel, isolating ring, wheel sleeve, nail and toothed shaft assembled together. The key point of the mechanism is that the gear with both inner and outer teeth and the double swing links constitute one enclosed transmission chain for transferring motion and force in single way. The mechanism has mesh between gear and automatic hammer and mesh between toothed shaft and automatic spring winding wheel. The mechanism is high in reliability, long in service life, low in cost and high in efficiency.

Description

(1) Technical field: [0001] The invention relates to a double-rod interlocking reversing mechanism of an automatic watch and an interlocking reversing method thereof, belonging to watch manufacturing technology. (two) background technology: [0002] The invention is a reversing mechanism that transmits motion force according to the specified rotation direction in a mechanical automatic watch, which can realize the automatic winding function of the mainspring, and can also be used in other instruments, meters or machines that need to transmit motion force in one direction . In automatic watches, the composition of the automatic winding wheel train is: automatic hammer (hammer gear) → reversing mechanism → automatic winding over wheel → winding wheel, the reversing mechanisms currently used mainly include escapement, ratchet and pawl type, overrunning clutch type and planetary wheel type. These reversing mechanisms all have the following problems: (1) theoretically there is ...

AI Technical Summary

Problems solved by technology

These reversing mechanisms all have the following problems: (1) there are factors of functional failure in theory, unreliable work and short service life

Because the escapement and planetary gears use low-strength helical gears, the sharp teeth are easy to wear and break; the teeth and claws in the structure of the ratchet and pawl (commonly known as "small fish") are also very sharp, low in strength, and easy to break. Abrasion; overrunning clutch-type reversing wheels adopt the principle of friction and self-locking, and the transmission motion cannot be locked if the friction coefficient changes slightly; therefore, these reversing mechanisms are easily damaged and invalid during use, that is, they lose the function of automatic winding ; (2) complex structure, many parts, low reliability and high cost; (3) poor manufacturability, difficult processing, high precision required, low pass rate, high cost; The strip speed is slow; (5) Lubricant cannot be added for lubrication, otherwise it will fail

[0003] The purpose of the present invention is to overcome and solve the problems of complex structure, poor manufacturability, difficult processing, low pass rate, high cost, low efficiency, slow winding speed, Can not add lubricants and other shortcomings and problems, research, invent a high reliability, good wear resistance, not easy to damage, long service life, good process performance, easy to manufacture, high pass rate, fast winding speed, Low-cost, double-bar interlocking reversing mechanism and interlocking reversing method for automatic watches that can be lubricated without failure

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