CN218248029U - Infusion pump with integrated cam shaft - Google Patents

Abstract

The utility model discloses an transfer pump with integral type camshaft, which comprises a pump body, the pump body includes the casing, wear to be equipped with the integral type camshaft in the casing, the integral type camshaft includes, locate first end both ends, with casing swing joint's end, and set up between 2 end, and become a holistic a plurality of cam section and linking section with it each other alternately, the cam section comprises the cam festival that a plurality of misplaced mutually. The utility model discloses a camshaft structure of integral type no longer need make cam, axle respectively and connect connecting piece between them, has adopted the camshaft structure of integral type, and the degree of difficulty step-down of production assembly has therefore avoided the wrong problem of assembly that manual operation probably exists, has not only reduced the cost of transfer pump equipment production and maintenance, has still improved transfer pump equipment's reliability, has fabulous application prospect.

Description

Infusion pump with integrated cam shaft

Technical Field

The utility model relates to an infusion equipment technical branch in the medical equipment technical field particularly, what have been related to is the transfer pump that is equipped with integral type camshaft.

Background

The infusion pump is a medical device for accurately controlling the dosage, is widely applied to medical activities, provides excellent help for a large number of medical workers to manage patients needing accurate dosage, and provides powerful support for creating a good treatment environment for a large number of patients. Because need accurate dosing, the operation of infusion pump is in a heavily loaded running state usually, in other words, generally through the motor under reduction gear's drive, drives an nested assembled camshaft that has a plurality of eccentric settings cams in proper order to this promotes the preforming regularly in turn, utilizes to produce apparent extrusion force between preforming and the pump body, constantly extrudees the transfer line of pressing from both sides and establishing in the middle for the liquid medicine trace in the transfer line, accurate, the continuation send into patient's is internal.

The existing production process mostly needs production personnel to manually and one by one penetrate the cam shaft, the cam on the cam shaft is spirally and eccentrically assembled, the eccentric amplitude is usually small, so that the assembly operation level has high requirements, once any one of the cam shaft is assembled incorrectly due to assembly deviation, the problem of liquid leakage and even threatening the life safety of a patient is easily caused, and effective improvement needs to be provided aiming at the inconvenience condition of the existing condition.

SUMMERY OF THE UTILITY MODEL

To the technical defect who exists in the background art, the utility model provides an infusion pump with integral type camshaft has solved above-mentioned technical problem and has satisfied the actual demand, and concrete technical scheme is as follows:

the transfer pump with integral type camshaft, which comprises a pump body, the pump body includes the casing, wear to be equipped with the integral type camshaft in the casing, the integral type camshaft includes, locate first end both ends, with casing swing joint's end portion, and set up between 2 end portions alternately each other, and become a holistic a plurality of cam section and linking up the section with it, the cam section comprises the cam festival that a plurality of misplaced each other, the line between the eccentric centre of a circle of cam festival and the self centre of a circle is the central line, and the central line between every 2 adjacent cam festivals is equipped with the same contained angle, every 1 the cam festival all be equipped with the cover outside the cam festival alone, along the direction of motion tangential swing joint of cam festival in press the part in the casing.

The utility model has the advantages of that: the integrated camshaft structure is adopted, and in the production and assembly processes, the cam, the shaft and the connecting piece for connecting the cam and the shaft are not needed to be manufactured respectively, so that the problem of assembly errors possibly caused by manual operation is avoided in the assembly process, the production and maintenance costs of the infusion pump equipment are reduced, the reliability of the infusion pump equipment is improved, and the integrated camshaft structure has a good application prospect.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is the structural schematic diagram of the integrated camshaft of the present invention.

Fig. 3 is a schematic cross-sectional view of the integrated camshaft of the present invention.

Fig. 4 is a schematic view of a partial sectional structure of an integrated camshaft according to the present invention.

Wherein: the cam comprises a shell 1, an integrated camshaft 2, a head part 20, a cam section 21, a cam section 210, a drop height 211, a connecting section 22, a stop section 23, a first injection molding layer 24, a second injection molding layer 25, a pressing part 3 and a core rod 4.

Detailed Description

The embodiments of the present invention will be described with reference to the accompanying drawings and related examples, but the embodiments of the present invention are not limited to the following examples, and the relevant essential components of the present invention related to the technical field should be regarded as known in the art, and can be known and grasped by those skilled in the art.

Referring to fig. 1 to 4, be equipped with transfer pump of integral type camshaft, including the pump body, the pump body includes casing 1, wear to be equipped with integral type camshaft 2 in the casing 1, integral type camshaft 2 includes, locate first end both ends, with casing 1 swing joint's end portion 20, and set up between 2 end portions 20 alternately each other, and become a holistic a plurality of cam section 21 and link up the section 22 with it, cam section 21 comprises a plurality of cam section 210 that misplaces each other, the line between the eccentric centre of a circle of cam section 210 and the self centre of a circle is the central line, and the central line between every 2 adjacent cam section 210 is equipped with the same contained angle, every 1 cam section 210 all is equipped with the cover outside cam section 210 alone correspondingly, along cam section 210's direction of motion tangential swing joint in pressing part 3 in casing 1.

It should be noted that, although the present invention does not indicate any other listed or not listed necessary structures of the driving motor, the control component, the power supply, the bearing, the end cap, the return spring, etc., these structures are all those that can be added by oneself by those skilled in the art who combine the disclosure of the present invention, and do not represent the present invention is not needed when setting up for use.

Among the prior art, the assembly of camshaft generally is after adopting the preparation axis body, embolia one by one according to the law with individual cam one by one and become the camshaft among the axis body, and the artifical problem of wearing the wheel lies in having the hidden danger of equipment mistake, and the simultaneous processing cost is higher, in case wear the mistake, there is the condition of dystopy in the assembly angle of cam, the transfer line just can not be compressed tightly completely when being extrudeed by the camshaft, and then the condition of producing the weeping, influence the accurate degree of infusion volume, will threaten patient's life safety when serious.

The utility model discloses in, the biggest characteristics of this transfer pump are in the setting of integral type camshaft 2 and structure, in the middle of this structure, cam subassembly in the conventional design no longer need other connecting pieces to go to be used for with the axis body coupling, simultaneously, also no longer need the production maintainer to proofread one by one the installation accuracy of cam and specific deflection angle, and the non-existent of fit clearance also lets the influence of the degree of coordination loss that takes place between the spare part reduced to minimumly.

Therefore, the utility model discloses an integral type structure has effectively reduced the processing degree of difficulty when producing, can adopt the mode direct forming who moulds plastics in production, and fundamentally stops assembly error's emergence. Therefore, as long as the precision of the injection mold meets the production requirement, the integral shaft bodies with the same performance and the same precision can be produced in a large scale, the efficiency is high, the speed is high, and the problem of liquid leakage caused by the cam ectopic position can be avoided.

Set up and be in among the integral type camshaft 2 in the transfer pump, there is a plurality of cam festival 210 that the cam according to current combination formula camshaft is the same to be carried out setting up, lets different cam festival 210 stagger according to certain law for contained angle between the adjacent cam festival 210 is unanimous with the angle of deflection of cam on the current combination formula camshaft, and guarantee drive effect is also unanimous.

And, in order to guarantee the utility model discloses the reliability of integral type axis body keeps equivalent with current assembled axis body, cuts apart cam section 21, connects by linking up section 22 for the antitorque performance of whole camshaft obtains strengthening, improves life. In addition, the end heads 20 are arranged at the two ends of the integrated camshaft 2, so that the structure can be assembled with the existing infusion pump shell, and the phenomenon of dislocation can not occur.

In summary, the arrangement of the structure ensures that the integrated cam shaft can stably provide the rotating speed and the pressure output matched with the set infusion parameters, so that the micro, high-precision and durable infusion operation can ensure long-term safety and controllability.

Referring to fig. 3, one of the preferred embodiments of the present invention, integral type camshaft 2 is equipped with at least 2 layers from inside to outside, including locating the most inboard first layer 24 of moulding plastics and evenly wrap up in the layer 25 is moulded plastics to the second in the first layer 24 outside of moulding plastics, because the camshaft belongs to the less effort piece of volume, will guarantee the quality level of life and processing, if only adopt one shot forming's mode preparation the utility model discloses an integral type camshaft 2, because plastics mould plastics in-process, can be inevitable to produce the problem of contract gum, these surface defects can influence the infusion precision of the transfer pump that uses this axis body, have high medical malpractice risk.

And the second injection molding layer 25 can be molded more quickly after covering surface defects such as shrinkage and the like on the first injection molding layer 24, so that the processing efficiency is improved, and the quality of finished products in the processing process is also improved. Especially, during injection molding, a producer can select at least 2 different plastic raw materials to serve as the injection molding raw materials of the first injection molding layer 24, the second injection molding layer 25 and even more layers according to the stress distribution condition of the shaft body, so that the composite structure is formed, and the mechanical properties of the integrated part, such as torsion resistance, compression resistance and the like, are effectively improved.

Referring to fig. 4, one of the preferred embodiments of the present invention, the integrated camshaft 2 is equipped with 1 mandrel 4 embedded along the self axis direction, and through increasing mandrel 4 therein as strengthening the structure, can promote holistic anti bending performance and anti torsion performance of axis body well, lets the utility model discloses an integrated camshaft 2 structure is more reliable, stable, and consequently, high strength material such as metal can be selected to this mandrel 4's material in order to satisfy the needs of strengthening whole overall structure.

Combine 2 first embodiments, the utility model discloses there is better combination embodiment, promptly in the preparation, at first put into the material of plug 4 and accomplish once moulding plastics in the middle of the mould of once moulding plastics, form embedded plug 4's the first layer 24 back of moulding plastics, carry out the secondary to it again and mould plastics, make the second mould plastics layer 25 shaping, because of 2 times mould plastics and satisfy the user demand, the event final formation is from inside to outside three layer construction, innermost plug 4 promptly, the layer 25 is moulded plastics to the first layer 24 of moulding plastics of middle and the second in the outside, the life preferred of the integral type camshaft 2 who processes out like this, physical properties is better, machining efficiency is very high, can satisfy large batch transfer pump production assembly needs, simultaneously can also retrieve and recycle, have fine economy and practical value.

The utility model discloses one of the preferred embodiment, the length of plug 4 with the overall length of integral type camshaft 2 is imitative, also can hold the position that plug 4 set up better in the course of working, lets plug 4 combine more evenly with the material of moulding plastics, more conveniently produces the whole product that does not have obvious defect.

Referring to fig. 1 and 2, in one of the preferred embodiments of the present invention, a disc-shaped stop section 23 is provided between the end portion 20 and the cam section 21, and by using the stop section 23, the camshaft can accurately define its assembling position, ensuring the accuracy of the transmission.

Referring to fig. 2, in one of the preferred embodiments of the present invention, a drop position 211 extending toward the same direction is axially disposed between the stopping section 23 and the cam node 210 and between any 2 adjacent cam nodes 210, and any 2 adjacent drop positions 211 are staggered with each other, the drop position 211 is disposed to help improve the strength of the connection structure between the cam nodes 210, and the disposition mode also conforms to the deflection rule of the cam node 210.

Referring to fig. 2, in one of the preferred embodiments of the present invention, the fall position 211 between the cam nodes 210 is set at the outer contour line intersection of the adjacent 2 cam nodes 210, which is the position with the largest shearing force, so that the strength of the structure can be significantly improved by setting the fall position 211.

Referring to fig. 1 and 2, in one of the preferred embodiments of the present invention, there are 3 sets of the cam segments 21, each set of the cam segments 210 of the cam segments 21 is 4, and the linking segment 22 is only disposed between the adjacent cam segments 21, so as to satisfy most of the application occasions requiring a cam shaft, which is very convenient.

The utility model has the advantages of that: the integrated cam shaft structure is adopted, and in the production and assembly processes, the cam, the shaft and the connecting piece for connecting the cam and the shaft are not required to be manufactured respectively, so that the problem of assembly errors possibly existing in manual operation is avoided in the assembly process, the production and maintenance cost of the infusion pump equipment is reduced, the reliability of the infusion pump equipment is improved, and the integrated cam shaft structure has a good application prospect.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims (8)

1. The transfer pump with integral type camshaft, including the pump body, its characterized in that, the pump body includes the casing, wear to be equipped with the integral type camshaft in the casing, the integral type camshaft includes, locate first end both ends, with casing swing joint's end portion and set up between 2 end portions alternately each other, and become a holistic a plurality of cam section and linking section with it, the cam section comprises the cam festival that a plurality of misplaced each other, the line between the eccentric centre of a circle of cam festival and the self centre of a circle is the central line, and the central line between 2 every adjacent cam festival is equipped with the same contained angle, every 1 the cam festival all be equipped with the cover alone outside the cam festival, along the direction of motion tangential swing joint of cam festival in pressing part in the casing correspondingly.

2. The infusion pump with the integrated camshaft, according to claim 1, wherein the integrated camshaft has at least 2 layers from inside to outside, including a first injection molding layer disposed at the innermost side and a second injection molding layer uniformly wrapped at the outer side of the first injection molding layer.

3. The infusion pump with integrated camshaft stated in claim 1, wherein, the said integrated camshaft has 1 core rod embedded in the direction of its own axis.

4. An infusion pump with an integrated camshaft as claimed in claim 3, wherein the length of the core rod is similar to the full length of the integrated camshaft.

5. An infusion pump with an integrated camshaft, according to claim 1, characterized in that a disc-shaped stop section is provided between the end head and the cam section.

6. The infusion pump with integrated camshaft, according to claim 5, wherein a drop position extending in the same direction is axially provided between the stop section and the cam section, and between any 2 adjacent cam sections, and any 2 adjacent drop positions are mutually staggered.

7. An infusion pump with an integral cam shaft according to claim 6, wherein the drop height between the cam segments is arranged at the intersection of the outer contour lines of the adjacent 2 cam segments.

8. The infusion pump with integrated camshaft of any of claims 1 to 7, wherein the number of the cam segments is 3, the number of the cam segments of each set is 4, and the engagement segments are only disposed between adjacent cam segments.

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