A syringe pump and its transmission device

A technology of transmission device and syringe pump, which is applied in the direction of subcutaneous injection equipment, pressure infusion, and equipment introduced into the body, etc., which can solve the problem of the reduction of injection accuracy and service life of the syringe pump, and the aggravation of abnormal wear and tear of the nut and the threaded mandrel. Scratching with the screw rod, etc., to achieve the effect of convenient operation, labor saving, reduced process, and avoiding screw tooth wear

CN105727394BActive Publication Date: 2019-03-26MEDCAPTAIN MEDICAL TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2019-03-26

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Abstract

The invention discloses an injection pump and a transmission device thereof.The transmission device comprises a screw rod, a semi nut, a moving component, a sliding seat, an elastic component and an electrical driving assembly; the semi nut and the moving component are both slidably arranged on the sliding seat; the moving component can move relative to the semi nut, and the elastic component is connected to the semi nut; when the electrical driving assembly drives the moving component t move to a first position in the direction far away from the screw rod, the semi nut is driven by the moving component to move to the position where the semi nut is separated from the screw rod; when the electrical driving assembly drives the moving component to move to a second position in the direction close to the screw rod, the semi nut is meshed with the screw rod under the action of elastic force of the elastic component, and the moving component and the semi nut are in clearance fit in the sliding direction of the moving component and the semi nut.The electrical driving assembly can be utilized for driving the semi nut to be completely separated from the screw rod, abrasion of threaded teeth is avoided, the service life is prolonged, operation is convenient to conduct, and labor is saved; the semi nut is meshed with the screw rod through elastic force, meshing reliability is guaranteed, the whole structure is simple, and process and machining difficulty is lowered.
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Description

technical field

[0001] The invention relates to the field of medical equipment, in particular to an injection pump and a transmission device thereof. Background technique

[0002] The syringe pump is a medical instrument that pumps the liquid medicine into the human body precisely, in a small amount, uniformly and continuously. The operation is convenient, it can be timed and quantified, and the speed and dose can be adjusted at any time according to the needs of the disease, which can reduce the workload of medical staff, improve work efficiency, and accurately, safely and effectively cooperate with medical staff for rescue and treatment.

[0003] A syringe pump generally includes a propulsion mechanism, a transmission mechanism and other parts. The working principle of the injection pump is that the motor drives the screw to rotate, and the screw drives the nut engaged with it to move linearly along the axis of the screw. The nut is connected with the propulsion mechanis...

Examples

Embodiment approach

[0045] Here, in other embodiments, it is also possible that the electric drive assembly includes a drive motor and a cam, the drive motor is fixed on the sliding seat, and the cam is connected to the drive motor and rotates under the drive of the drive motor. The cam is connected to the moving part 13 to drive the moving part 13 to reciprocate in a straight line; or, the electric drive assembly includes a driving motor, a gear and a rack, the driving motor is fixed on the sliding seat 14, the gear is connected to the driving motor, and the gear and the rack are meshed , the drive motor drives the gear to rotate to drive the rack to move linearly, and the rack is connected to the moving part to drive the moving part to move; as another embodiment, the electric drive assembly includes a cylinder, which is fixed on the sliding seat 14, and the cylinder The piston rod is connected with the moving part 13 to drive the moving part 13 to move linearly.

[0046] In this embodiment, th...