CN2881593Y

CN2881593Y - Oscillator

Info

Publication number: CN2881593Y
Application number: CNU2005200681860U
Authority: CN
Inventors: 张辉; 陈祖仁
Original assignee: ZHUHAI HEMA MEDICAL INSTRUMENT CO Ltd
Current assignee: ZHUHAI HEMA MEDICAL INSTRUMENT CO Ltd
Priority date: 2005-11-25
Filing date: 2005-11-25
Publication date: 2007-03-21
Anticipated expiration: 2015-11-25

Abstract

The utility model relates to a mechanical instrument, in particular to an oscillator comprising a test-tube vibrating table, a cover of bearing, a bearing, an anti-rotating ring, an anti-rotating tension spring, an eccentric shaft of balancing block, a position-limiting support and a motor. The position-limiting support is fixed on the stator of the motor, the anti-rotating ring and the position-limiting support are respectively located on the two ends of the anti-rotating tension spring. The utility model is characterized in that the model also equipped with a balancing block located at the lower part of the motor shaft. By the mounting of the balancing block on the lower part, the oscillator of this utility model balances not only the main vector but also the main torque, and prevents the whole oscillator from non-balancing at the rotating direction, so the balance of the oscillator is enhanced.

Description

Oscillator

Technical field

The utility model relates to a kind of medical instrument, particularly a kind of oscillator.

Background technology

Oscillator mainly contains following components and forms: the test tube shaking table, bearing holder (housing, cover), bearing, anti-turn-taking, anti-rotation draws in spring, the counterbalance weight excentric shaft, position-limited rack, motor, counterbalance weight etc., medically be mainly used in tube shaken, test tube is put in the test tube shaking table, shake with the test tube shaking table, every bit is all made circular motion with same radius on the test tube shaking table, test tube shaking table integral body is done translation, therefore test tube is also done translation, oscillator of the prior art is owing to have only a counterbalance weight excentric shaft at most, therefore, can only the balance master vow at most, and uneven main square causes the imbalance of whole oscillator on rotation direction.

The utility model content

Technical problem to be solved in the utility model is, a kind of oscillator that all obtains balance on main resultant master's square is provided.

Technical problem to be solved in the utility model is achieved by the following technical solution:

A kind of oscillator, it comprises test tube shaking table, bearing holder (housing, cover), bearing, anti-ly turn-take, anti-rotation back-moving spring, counterbalance weight excentric shaft, position-limited rack and motor, position-limited rack is fixed on the motor stator, anti-rotation back-moving spring two ends are respectively anti-and turn-take and position-limited rack, it is characterized in that it also comprises the counterbalance weight that is positioned at the motor shaft bottom.

The installation of the utility model oscillator by the bottom counterbalance weight, not only balance main arrow, also balance main square, prevented the imbalance of whole oscillator on rotation direction, improved the balance of whole oscillator.

Description of drawings

Fig. 1 is the partial sectional view of the utility model oscillator;

Fig. 2 removes A behind the upper member 1-8 to view for Fig. 1;

Embodiment

Referring to Fig. 1 and Fig. 2, a kind of oscillator, it comprises test tube shaking table 1, bearing holder (housing, cover) 2, bearing 3, anti-ly turn-take 4, anti-rotation back-moving spring 6, counterbalance weight excentric shaft 7, position-limited rack 10 and motor 12, position-limited rack 10 is fixed on motor 12 stators, anti-rotation back-moving spring 6 two ends are respectively anti-and turn-take 4 and position-limited rack 10, in addition, it also comprises the counterbalance weight 13 that is positioned at the motor shaft bottom.

Test tube shaking table 1 is enclosed within on the bearing holder (housing, cover) 2, and bearing holder (housing, cover) 2 is enclosed within on the outer ring of bearing, and the sulculus of four equal portions is arranged in bearing holder (housing, cover) 2 bottoms, and anti-turn-taking 4 is enclosed within on the excircle of bearing holder (housing, cover) 2 lower ends, and with screw 5 bearing holder (housing, cover) 2 and bearing 3 outer rings tightened together.Bearing 3 inner rings are installed on the counterbalance weight excentric shaft 7, counterbalance weight excentric shaft 7 is installed on the motor shaft and uses screw 8 fastening, position-limited rack 10 is fixed on the motor stator by screw 9 by pad post 11, two projectioies and form stopper slot 101 about position-limited rack 10 is provided with, anti-4 the arm of turn-taking just drops in the stopper slot 101, prevent turn-taking 4 by 6 tensions of anti-rotation back-moving spring, swing to prevent bearing holder (housing, cover) 2.In the lower end of motor shaft counterbalance weight 13 is installed, this counterbalance weight 13 is fixed in motor shaft by screw 14, and counterbalance weight excentric shaft 7 all has eccentric structure with counterbalance weight 13.

Test tube shaking table 1 each point under 6 controls of anti-rotation back-moving spring is done the circular motion that orbital radius is e during motor 12 revolutions, and integral body is done translation.The effect of medium in vitro of vibrating is played in the vibration that is close together of test tube and test tube shaking table 1 arbitrfary point.Test tube shaking table 1, bearing holder (housing, cover) 2, bearing 3, anti-turn-take 4 coaxial, barycenter is done gyration with respect to motor shaft, produce centrifugal force, this centrifugal force acts on the casing by motor stator, produce vibration and noise, therefore must give and balance, the utility model has adopted two plane balancing, it is the common balance of eccentric mass of the counterbalance weight eccentric mass and the lower end counterbalance weight 13 of counterbalance weight excentric shaft 7, angle from theoretical mechanics, main exactly the arrow with main square all obtains balance, this method balance oscillator is respond well, test tube shaking table 1 during installation, counterbalance weight excentric shaft 7, counterbalance weight 13 three's barycenter must coplane, and this plane must pass through axis of rotation, and the off-centre of counterbalance weight 13 must with the off-centre of test tube shaking table 1 in the same way.

The utility model also has some other distortion or improvement.If those skilled in the art are subjected to the change or the improvement of the conspicuous unsubstantiality that inspiration of the present utility model makes, all belong to the protection domain of the utility model claims.

Claims

1, a kind of oscillator, it comprises test tube shaking table, bearing holder (housing, cover), bearing, anti-ly turn-take, anti-rotation draws in spring, counterbalance weight excentric shaft, position-limited rack and motor, position-limited rack is fixed on the motor stator, anti-rotation back-moving spring two ends are respectively anti-and turn-take and position-limited rack, it is characterized in that it also comprises the counterbalance weight that is positioned at the motor shaft bottom.

2, oscillator according to claim 1 is characterized in that, the size of this counterbalance weight is determined by the size and the quality of above-mentioned each parts.

3, oscillator according to claim 1 is characterized in that, position-limited rack is provided with two projectioies and forms stopper slot, and anti-arm of turn-taking falls within the stopper slot.