Classifications

• • G—PHYSICS
  • G04—HOROLOGY
  • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
  • G04B45/00—Time pieces of which the indicating means or cases provoke special effects, e.g. aesthetic effects
  • G04B45/0038—Figures or parts thereof moved by the clockwork
  • G04B45/0053—Figures or parts thereof moved by the clockwork with oscillating motion in hanging or standing clockworks such as imitation of a real pendulum

Definitions

• the invention relates to a drive device for non-regulating, sufficiently oscillating mechanical geng regulators of clocks, in particular of large clocks, which are provided with an electrical or an electronic, timeless rotating drive for the pointer movement and for the non-regulating gear regulator.
• this drive device is associated with the considerable part of the watch that the required technical effort and the precision of the individual parts used are relatively large and that this device is relatively expensive to manufacture the individual parts and to assemble them.
• this drive device is relatively susceptible to failure due to the required pendulum spring as a guide force for the gear regulator.
• the invention has for its object a drive device for to create such regulators and clocks of the type mentioned, which is simple and economical in its technical structure, as well as in the manufacture and assembly, and can be handled reliably.
• This object is achieved in that a cam mechanism is provided between the time-keeping rotating drive and the gear controller, which converts the rotating movement of the time-keeping drive into a reciprocating movement for driving the gear controller, and that the rocker arm of the cam mechanism with the Gear regulator is engaged.
• The, in engagement with the rocker arm of the cam mechanism, is thereby forcibly moved back and forth, whereby the back and forth movement can be set in its speed in such a way that it approximately with the natural vibration of a gear controller with a corresponding mass and a corresponding spring force is comparable.
• Rocker arm and the gear regulator for example a pendulum, in particular a rotary pendulum, a gear transmission is provided.
• a pinion is expediently provided on the shaft of the gear regulator, with which a corresponding segment of the cam mechanism is in engagement.
• the cam cam eccentric which acts on the rocker arm, is designed as a so-called arch triangle, so that a so-called triangular arch mechanism is formed, in which the movement of the rocker arm is sinusoidal runs.
• a so-called buffer in the form a spring force element, in particular a spring force accumulator is arranged, which is dimensioned such that the torque required to drive the gear regulator is sufficiently elastically transmitted, and that both the step-by-step drive impulses of a stepper motor in the time-keeping drive and certain inhibiting or stressful impairments of the gear regulator are compensated are compensated for by the respective excess or missing torque from the spring force accumulator of the buffer or is taken up in this.
• An advantage of the device according to the invention is not only the technically simple, clear and unproblematic structure, in particular due to the clear engagement conditions in the entire power flow of the individual parts involved, but also the cost-effectiveness of the device, due to the relatively few individual parts, which also can be easily manufactured from plastic.
• Another advantage is the high level of functional reliability and the efficiency of the device, in particular due to the lack of gear regulator directivity (pendulum or spiral spring), due to the direct engagement of the gear regulator with the drive.
• FIG. 1 is a diagrammatic front view of a device according to the invention which is driven by a quartz-controlled stepper motor and which drives a rotary pendulum as a passive gear regulator,
• Fig. 2 is a side view of the arrangement of Fig. 1 and
• Fig. 3 is a front and side view of the cam mechanism with the buffer device in the form of a spring force accumulator.
• the drive device shown in FIG. 1 for a non-regulating, passive gear regulator in the form of a rotary pendulum 1, in a watch with a quartz-controlled stepper motor 2 for the timed drive of the pointer mechanism 3, consists essentially of a cam mechanism with an eccentric h and a, with this engaging, rocker arm 5.
• the eccentric 4 is in engagement with the power flow from the stepping motor 2 to the pointer mechanism 3 via a gear train, with a gear 6 and a pinion 7.
• the eccentric 4 is therefore driven continuously, in the present case step by step.
• the continuous rotation of the eccentric 4 is converted into a reciprocating movement of the rocker arm 5.
• This reciprocating movement of the rocker arm 5 is transmitted via a gear meshing to the rotary pendulum 1, which thus moves back and forth in a positively controlled manner.
• a gear transmission ratio in particular with a pinion 10 and a segment 11 is arranged between the rocker arm 5 and the pinion 9 on the rotary pendulum 1.
• a desired amplitude of the rotary pendulum 1 can be achieved with a small eccentricity of the eccentric 4 and thus a small amplitude of the rocking lever 5.
• the segment 11, which is in engagement with the pinion 9 is particularly equipped with a crown gear tooth position.
• FIG. 2 shows the drive device in a different perspective.
• FIG. 2 shows the stepper motor, which drives a gearwheel 14 via a pinion 12 on the rotor 13, which gearwheel is provided in particular with two further pinions 7 and 15.
• the pinion 15 is in engagement with the seconds wheel of the clockwork 3 of the watch and the pinion 7 is in engagement with the gear 6 on the eccentric 4.
• 5 denotes the rocker arm with a toothed segment 16 coupled to it, which is engaged there with the pinion 10, which is in connection with the crown-toothed segment 11, which in turn is in engagement with the pinion 9 on the pendulum rod 17 of the rotary pendulum 1.
• this drive device and the associated gear transmission ratios are expediently made rationally and economically from plastic.
• the eccentric 4 which is integrally connected to the gear 6, in the area of its surface which is in rolling engagement with the guide 8 a, in particular metal, surface coating is provided.
• This surface coating expediently consists of a, in particular thin-walled, pipe section which is non-positively pressed onto the eccentric plastic part or is rotatably mounted there.
• the pinion 9 on the rotary pendulum 1 is made of metal, in particular of driving steel, for frictional reasons.
• FIG. 2 further shows the rocker arm 5 and the segment 16 coupled to it, in particular in two parts, and coupled to one another by a spring element 18.
• This spring element 18 is used there as a spring force accumulator or buffer for influences from the drive or from the gear regulator rotary pendulum 1.
• FIG. 3 shows the cam mechanism with this buffer device in more detail.
• 4 means the eccentric in engagement with the fork-shaped guide 8 on the rocker arm 5.
• 16 denotes the toothed segment coupled to the rocker arm 5 by means of the spring element 18.
• the spring element 18, made of a spring steel wire, is fixed with the respective ends 19 in axially extending fixing pins 20 on the rocker arm 5 and on the segment 16, in particular free of play, so that the coupling of the two parts 5 and 16 is sufficiently free of play.
• this spring element 18 can also be made of plastic and be integrally connected to one of the two parts 5 or 18 and be in meshing engagement with the other.
• 3 shows there, in side view, the common mounting of the two parts 5 and 18 on a common shaft 21.
• this Fig. 3 shows the special design of the eccentric 4 as a so-called triangle to achieve a sufficiently sinusoidal course of the movement of the rocker arm 5.
• the fork-shaped guide 8 of the rocker arm 5 is closed on the front.
• versions with so-called cam loops or with cross slide gears can also take the place of the cam mechanism if this is particularly advantageous for driving a corresponding gear regulator.
• a fork-like or lever-like engagement or a traction means connection is also provided. It is irrelevant whether the axes of the drive device are arranged parallel to the axis of the speed controller or offset at an angle of in particular 90 ° to one another.
• the segment 16 on the rocker arm 5 or the segment 11, which is in engagement with the pinion 9 on the passive gear regulator is dimensioned in the segment angle such that if the gear regulator is rotated improperly, in particular by manual loading, the segment in each case comes out of engagement with the pinion 9 of the gear regulator, as soon as the maximum permissible amplitude of the gear regulator is exceeded, the spring force element 18 restoring the engagement with the pinion 9 by its restoring force after the impairment has ended.

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• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Transmission Devices (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6205450

Family Applications (1)

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Family Cites Families (6)

• 1983
  • 1983-08-01 DE DE19833327695 patent/DE3327695A1/de active Granted
• 1984
  • 1984-07-31 WO PCT/DE1984/000161 patent/WO1985000675A1/de active Application Filing
  • 1984-07-31 EP EP19840903052 patent/EP0150213A1/de not_active Withdrawn

Non-Patent Citations (1)

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