String fine-tuning mechanism based on planetary gear transmission with small tooth difference

A planetary and gear transmission technology with less tooth difference, applied in the direction of gear transmission, transmission, transmission parts, etc., can solve the problems of tuning accuracy and quality influence, poor long-term use effect, poor tuning accuracy, etc. The effect of small vibration, reducing the space occupied, and increasing the accuracy

CN109473083APending Publication Date: 2019-03-15HENAN UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2019-03-15

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Abstract

The invention relates to a tuning device for stringed instruments, in particular to a string fine-tuning mechanism driven based on planetary gear transmission with a small tooth difference. The mechanism comprises a positioning sleeve shaft, a winding drum shaft, a positioning mandrel and a tuning device, wherein the winding drum shaft is rotatably arranged in the positioning sleeve shaft, and thepositioning mandrel is rotatably arranged in the winding drum shaft; the tuning device comprises an annular chute fixed to the positioning sleeve shaft and a rotary knob rotatably arranged at the outer edge of the annular chute, one end of the winding drum shaft is positioned in the annular chute and coaxially and fixedly provided with a pin disc, and an offset transmission shaft is eccentricallyarranged in the rotary knob; a planetary gear is coaxially and rotatably arranged on the offset transmission shaft and is in meshing transmission connection with an inner gear ring positioned on theinner edge of the annular chute, a plurality of pin holes are also formed in the planetary gear, pin shafts which are in inscribed matching with the pin holes are correspondingly arranged on the pin disc, and the diameter of each pin shaft is smaller than the aperture of the corresponding pin hole so that the planetary gear can drive the pin disc to rotate. The mechanism can achieve fine-tuning ofthe tightness of strings and generates low noise during tuning of the strings, and the influence of temperature and humidity on the mechanism is small.
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Description

technical field

[0001] The invention relates to a tuning device for a stringed musical instrument, in particular to a string fine-tuning mechanism driven by a planetary gear with a small tooth difference. Background technique

[0002] Stringed instruments such as violins and cellos need to be tuned before use to ensure the best sound when playing, especially for violins, tuning is particularly important.

[0003] Stringed instruments such as violins and cellos are not only instruments, but also handicrafts. They have high requirements on shape and size, and the design of automatic tuning mechanism is difficult.

[0004] At present, there are usually holes in the head of the piano, and solid wooden tuning rods are inserted into the two holes, the strings are fixed and coiled on the tuning rods, and the tuning rods are rotated through the knobs on the tuning rods. Carry out tuning and tuning. Use this method to fine-tune the strings, so that the tuning accuracy is poor, the ...

Examples

Embodiment Construction

[0025] like figure 1 and figure 2 As shown, a string fine-tuning mechanism driven by a planetary gear 3 with a small tooth difference of the present invention includes a positioning sleeve shaft 6, a spool shaft 7 coaxially rotated in the positioning sleeve shaft 6, and a coaxially rotating drum shaft 7 arranged in the positioning sleeve shaft 6. The positioning mandrel 8 in the mandrel shaft 7 and the adjustment device. The rotation of the adjusting device can drive the reel shaft 7 and its small rotation angle to rotate, thereby realizing fine-tuning of the tightness of the strings fixed on the reel outer shaft 702 .

[0026] Both the spool shaft 7 and the positioning mandrel 8 are stepped shafts. The spool shaft 7 includes coaxially distributed small-diameter sections and large-diameter sections. The small-diameter sections form the spool inner shaft 701 and are installed in the positioning sleeve shaft 6 with clearance fit. The spool outer shaft 702 formed by the large-...