A kind of Machine core of turret clock gear train
The utility model relates to the time keeping instrument technical field, relates in particular to a kind of Machine core of turret clock gear train.
The turret clock that puts goods on the market at present and install and use has not only brought beautiful enjoyment to the city, and provides time showing, time service very easily for people.Yet because the design of Machine core of turret clock gear train itself still has many unreasonable parts, thereby also cause quality, the price of turret clock to exist suitable weak point: the first is because stepper motor directly drives the straight-tooth gear transmission, because rotating speed is fast, in the straight-tooth gear engagement process certain interval is arranged, produce high-frequency bump during running, not only stable working is poor, and noise can reach the 120-160 decibel, and gear very easily damages, directly influence runs well and maintenance cost.It two is because gear wheel is the transmission of many groups slows down, thereby complex structure, and volume is big, and manufacturing cost and selling price are higher.
The purpose of this utility model is to provide a kind of stable working, and noise is low, and is simple in structure, selling cost is moderate, the running reliable in quality reduces the Machine core of turret clock gear train of maintenance cost, can be suitable for the movement of the turret clock of public places uses such as city, harbour, harbour, station widely.
Another goal of the invention of the present utility model provides a kind of can the demonstration night, the transmission of reliable quality Machine core of turret clock, lighting mechanism.
The purpose of this utility model is achieved by following technical solution: a kind of Machine core of turret clock gear train, it comprises mutual meshed gears train on movement housing, stepper motor, transmission shaft, needle shaft and the transmission shaft, its special character is that a side of movement housing is established a stepper motor and is connected with worm screw, the worm gear of worm screw and its engagement constitutes input end first order reducing gear, and the gear that is arranged on the worm-wheel shaft is meshed with the gear drive train.
Compared with the prior art the utility model has the following advantages and good effect: first technical solution of the present utility model is directly to be attached thereto the worm drive that connects by stepper motor, reach and drive the worm gear that is meshed with worm screw, as input end first order gearing-down, because worm gear, worm geared characteristic, overcome the shortcoming of spur gear transmission in the prior art, make scheme described in the utility model have stable working, remarkable result that noise is low, detect through Shandong Province's clock and watch testing agency, its noise is below 40 decibels; Its two be the technical solution of the utility model by worm gear, worm screw as input end first order gearing-down, its reduction gear ratio is far longer than spur gear and slows down, thereby make gear train described in the utility model have one group of under drive gear of minimizing, movement housing volume is reduced, the texture ratio prior art is simple, parts reduce, and characteristics such as production cost and expense reduction help promoting the use of; It three is technical schemes described in the utility model, except using the worm and gear transmission as the input end first order gearing-down, when further having reduced the transmission of prior art spur gear with the transmission gear that is meshed, the gear on worm-wheel shaft has the bump shortcoming, make in the train transmission process steady, the running quality is more reliable, has also reduced the maintenance cost in the turret clock operational process simultaneously.It four is after scheme described in the utility model provides the end face electric installation, can make Machine core of turret clock described in the utility model realize the Presentation Function at night, and the reliable good effect of display quality.
The concrete structure of a kind of Machine core of turret clock gear train of the utility model is provided by the following drawings and embodiment.
Fig. 1 is a structural representation of a kind of Machine core of turret clock gear train of the utility model;
Fig. 2 is the A-A cut-open view of Fig. 1;
Fig. 3 is the transmission principle figure of a kind of Machine core of turret clock gear train of the utility model;
Fig. 4 is another structural representation of a kind of Machine core of turret clock gear train of the utility model;
Fig. 5 is the B-B cut-open view of Fig. 4.
Describe the specific structural details of a kind of Machine core of turret clock gear train of the utility model in detail and carry out use below in conjunction with accompanying drawing as Machine core of turret clock.
Embodiment 1
A kind of Machine core of turret clock gear train (referring to accompanying drawing 1, accompanying drawing 2, accompanying drawing 3), the movement housing 1 that carries out fixedly connected combination with a plurality of screws is rectangular, its right side is provided with a boss, by screw stepper motor 6 is fixedly mounted on the movement housing 1 on the boss, worm screw 2 two ends are movably arranged on by rolling bearing in the two through hole of movement housing 1, and wherein an end is fixedlyed connected by keyway arrangements with the axle head of stepper motor 6.Worm screw 2 is meshed for the spiral of Archimedes worm screw of single head and with worm gear 3, constitutes input end first order reduction gearing mechanism.Pinion wheel 4 on worm gear 3, the worm-wheel shaft 5 is fixedly mounted on the worm-wheel shaft 5 by the keyway cooperation, worm-wheel shaft 5 passes through the bearing movable supporting of two ends interference suit on movement housing 1, pinion wheel 4 is meshed with needle shaft gear wheel 7, its pinion wheel 4 is the spur gear structure engages with needle shaft gear wheel 7, to form the double reduction gear train, reach the rotating speed requirement that not only realizes needle shaft 9, and it is steady to reach transmission process, guarantees running quality.Needle shaft 9 is movably arranged on movement housing 1 and hour hands axle sleeve 14 inner chambers by interference suit free bearing, be installed with needle shaft gear wheel 7 and needle shaft pinion wheel 8 by the keyway arrangements form, needle shaft gear wheel 7 is meshed with pinion wheel 4 on the worm-wheel shaft 5, needle shaft pinion wheel 8 is meshed with slow-speed shaft gear wheel 10 on being fixedly mounted on slow-speed shaft 11, be installed with hour hand axle gear wheel 13 by keyway arrangements on the hour hands axle sleeve 14 and be movably arranged on the movement housing 1 by axle sleeve outside interference suit free bearing, its inner chamber is by being sleeved on the version of the bearing outside diameter formation movable supporting on the needle shaft 9, hour hands gear wheel 13 is meshed with slow-speed shaft pinion wheel 12 on being fixedly mounted on slow-speed shaft 11, slow-speed shaft 11 is by keyway arrangements fixed installation slow-speed shaft gear wheel 10, slow-speed shaft pinion wheel 12 and respectively with needle shaft pinion wheel 8, hour hand axle gear wheel 13 is meshed, and slow-speed shaft 11 two axial ends are movably arranged on the movement housing 1 by interference suit free bearing respectively.More than constitute the static structure of a kind of Machine core of turret clock gear train of the utility model, this structure adopts the input end first order reduction gearing mechanism of worm screw 2 and worm gear 3, pinion wheel 4 on the worm-wheel shaft 5 is the double reduction transmission with the engagement of needle shaft gear wheel 7, can realize the rotating speed requirement of needle shaft 9, compared with the prior art, become the double reduction transmission by past three grades of spur gear gearing-down, saved one group of gear reduction gear train, reduce cost, save material, and making gearing-down process stable working, running quality is more reliable.
When a kind of Machine core of turret clock gear train described in the utility model when coming into operation, only need according to the designing requirement of using, with expansion bolt this gear train is fixedly mounted on desired location, give stepper motor 6 phase energizes, fixedly mounting hour hands and minute hand on the axle head of hour hands axle sleeve 14, needle shaft 9 respectively, and contrast the check that corresponding clock dial carries out necessity, can formally drop into the use of timing.
Embodiment 2
A kind of Machine core of turret clock gear train (referring to accompanying drawing 4, accompanying drawing 5), its cassette mechanism structure form be with embodiment 1, and the two ends of different is needle shaft 9 also are equipped with the end face electric installation.Its end face electric installation is front end (hour hands) end face electric installation and rear end (minute hand) end face electric installation two parts; Front end end face electric installation is to lay two conductive copper 23 by circular insulating board 15 and at its outer surface, the front end of two carbon brush 16 contacts with conductive copper 23, the end that its end is connected to lead 18 and exports hour hand axle 14 by the hole on hour hand axle 14, carbon brush 16 is fixed on the hour hand axle 14 by screw and securing member, and lead 17 is welded on the contact 24 that is connected with conductive copper 23; Rear end end face electric installation is to lay two conductive copper by circular insulating board 21 and at its outer surface, and be fixedly mounted on the end of minute hand shaft 9, two carbon brush 20 are fixedly mounted on the rear axle housing, its front end contacts with conductive copper, its end is connected to lead 22 and stretches out by rear axle housing, the contact that one end of lead 19 is connected with conductive copper welds, and the other end exports the front end of minute hand shaft 9 to by the endoporus of minute hand shaft 9.More than constitute another static structure of a kind of Machine core of turret clock gear train of the utility model.
When a kind of Machine core of turret clock gear train of the utility model when coming into operation, installation method is with embodiment 1, different is to be equipped with light-emitting device in minute hand, the hour hands, as long as lead 19 is linked to each other with lead on the minute hand, lead 18 is connected with lead on the hour hands, lead 17, lead 22 be energized respectively, can reach to make scheme described in the utility model possess the demonstration at night, and reliable purpose of display quality and effect.