CN2137140Y - Power-driver for stretching cervical or lumbar vertebra - Google Patents

Abstract

The utility model relates to a new traction power device of a medical machine for cervical-vertebrae or lumbar-vertebrae, omitting a hydraulic system or a complicated mechanical speed-changing system of the present same type machine. The device is composed of a motor and a controller. The motor works basically in a locked rotor state. A coiling wheel can be directly installed on an output shaft of the motor so that a traction device can generate the desired traction force. The controller is a silicon controlled voltage regulator changing the working voltage of the motor, namely changing the strength of the traction force. The utility model has the advantages of simple structure, low cost, convenient operation and no working noise.

Description

Power-driver for stretching cervical or lumbar vertebra

This utility model relates to medical apparatus and instruments.

Present cervical vertebra, lumbar hauling machine, be that motor remakes by hydraulic system or mechanical variable speed system and is used for haulage gear, to realize the pull strength and the selection and the adjustment in fluctuating cycle (also claiming the intermittent time), its complex structure, the cost height, controller circuitry is also complicated, thereby the fault rate height, the maintenance and repair difficulty.

The purpose of this utility model is a kind of new traction machine power set of design, makes to need not hydraulic system or complicated mechanical speed change system, just can make haulage gear produce required pull strength.

This purpose is to realize by such approach, promptly use can long-term work in the motor of stall state such as single-phase or three-phase torque motor, direct current torque motor, Electric machine with gear-box, slip electric motor etc., make substantially and move in the stall operating mode.The stalling torque of motor output is acted on haulage gear can obtain required pull strength.Change the running voltage of motor, its stalling torque changes, and pull strength also changes thereupon.Running voltage is changed by the periodic relief of setting, and pull strength is also by identical periodic relief.

Like this, designs simplification has reduced cost, has improved reliability, and easy to use, the work noiselessness.

Below by means of accompanying drawing this utility model is illustrated.

Novel cervical vertebra, lumbar hauling machine power set include motor and controller.

The output shaft of motor can directly be installed reel, also can connect a simple force-increasing mechanism that reel is installed.

Controller is the silicon-controlled voltage regulation device, has increased the trigger control circuit that is made of agitator in the circuits for triggering of pressure regulator.The outfan of agitator connects with circuits for triggering, can periodically control controllable silicon trigger the angle reach or after move.

Figure one and figure two are controller electrical schematic diagrams of two kinds of patterns.Figure one adopts bidirectional thyristor for regulating voltage, and unijunction transistor and pulse transformer trigger.Figure dual-purpose diode rectifier bridge and one-way SCR adjust blood pressure, unijunction transistor and resistance trigger.Because the adjust blood pressure part all is middlebrow circuit, no longer stating makes a presentation trigger control circuit below.

Trigger control circuit mainly is made of agitator.Among the figure one, agitator is by 555 integrated circuits, R ₁, RP ₃, C ₂Form V ₁, V ₂, C ₃Power supply for agitator.Diode V ₃As electrical switch.When 555 circuit tripods output high level, V ₃End, be equivalent to switch and disconnect, circuit is through RP ₁To C ₁Charging.When 555 circuit output low levels, V ₃Conducting is equivalent to switch connection, C ₁On the one hand through RP ₁Charging is on the one hand through RP ₂Discharge makes charge rate slow down.V ₃When ending, capacitor C ₁Charging is very fast, and controllable silicon triggers early, and motor operating voltage is higher, and pull strength is bigger, the available RP of its highest limit ₁Regulate.V ₃During conducting, capacitor C ₁It is slower to charge, and controllable silicon moves after triggering the angle, and motor operating voltage is lower, and pull strength is less, and its minimum can be by RP ₂Regulate.Regulate RP ₃Change the cycle of oscillation of 555 circuit that is the fluctuating cycle of change pull strength.

The output waveform of agitator can be made square wave or triangular wave, ladder row ripple, sawtooth waveforms etc.

G represents an agitator in figure two circuit.Compare with figure one circuit, oscillator output end is with not having diode, capacitor C between the circuits for triggering ₁Not only can be through RP ₂Discharge also can be through RP ₂Charging.Adjust RP ₂, can change thyristor operating angle leading and after the amount of moving, just change pull strength gone up and underlie poor.Regulate RP ₁The meansigma methods of scalable pull strength.

The size of pull strength and fluctuating quantity are gone back available current table P and are shown, and at force application mechanism device for measuring force demonstration etc. is installed in addition except that available potentiometer indication.

If motor is single phase ac torque motor or Electric machine with gear-box, motor can be connected on the M of figure one, figure two circuit ₁The place.For the clutch of direct current torque motor or slip electric motor, can be connected on the M in figure two circuit ₂The place.

Claims (3)

1, novel cervical vertebra, lumbar hauling machine power set, motor and controller are arranged, it is characterized in that the motor long-term work is in the stall state, and be to make traction apparatus produce required pull strength basically at the stall state, controller is the silicon-controlled voltage regulation device, in the circuits for triggering of pressure regulator, have by agitator to constitute, in order to the control thyristor operating angle periodically move forward or after the trigger control circuit of moving.

2, the described novel cervical vertebra of claim 1, lumbar hauling machine power set is characterized in that said motor is the single phase ac torque motor.

3, claim 1 or 2 described novel cervical vertebras, lumbar hauling machine power set, the outfan that it is characterized in that agitator has the diode as switch.

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