CN107362411B - Injection pump transmission device and injection pump applying same - Google Patents
Injection pump transmission device and injection pump applying same Download PDFInfo
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- CN107362411B CN107362411B CN201710477530.9A CN201710477530A CN107362411B CN 107362411 B CN107362411 B CN 107362411B CN 201710477530 A CN201710477530 A CN 201710477530A CN 107362411 B CN107362411 B CN 107362411B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/142—Pressure infusion, e.g. using pumps
- A61M5/145—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
- A61M5/148—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons flexible, e.g. independent bags
- A61M5/152—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons flexible, e.g. independent bags pressurised by contraction of elastic reservoirs
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/19—Constructional features of carpules, syringes or blisters
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- Health & Medical Sciences (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
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- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The embodiment of the invention discloses a transmission device of an injection pump and the injection pump using the same, belonging to the technical scheme of the field of injection pumps, comprising a screw rod, a transmission rod, a guide rod, a driving device, a push head, a transmission slide block and a clutch control mechanism; the screw rod, the transmission rod and the guide rod are arranged in parallel; the driving device is used for driving the screw to rotate; one end of the transmission rod is connected with the push head, and the other end of the transmission rod is connected with the transmission slide block; the transmission slide block can move along the length direction of the guide rod; the transmission sliding block is provided with a clutch nut and a clutch cam which are mutually abutted, the clutch control mechanism is used for driving the clutch cam to rotate, and the clutch cam can control the clutch nut to be meshed with and separated from the screw rod through rotation; the screw rod transmits power to the clutch nut through rotation, the clutch nut directly drives the pushing head to advance and push out, the power transmission route is simple, the transmission anti-interference performance is greatly improved, the structure is simple, and important help is provided for the miniaturization of the structure.
Description
Technical Field
The invention relates to the technical scheme in the field of injection pumps, in particular to an injection pump transmission device and an injection pump applying the same.
Background
The injection pump is commonly used in hospitals to accurately infuse the liquid medicine into the veins of human bodies, the liquid medicine infusion can be adjusted at regular time, fixed quantity and fixed speed according to the state of an illness of patients, the characteristics and the advantages of convenient operation enable the patients to be better treated, and meanwhile, the workload of medical staff is effectively reduced.
The injection pump can be generally divided into manual control, electric control and manual-electric hybrid control according to the driving working principle. Electrically controlled syringe pumps are labor-saving and simple to operate, but are poor in response speed, drive speed, and flexibility. The structure of the manually driven injection pump is complex relative to pure electric control, but the response and driving speed is high, and the reliability is high. Whereas a syringe pump with manual-electric hybrid control combines the advantages of both manual and electric, but this also increases the cost. Due to the advantages of high practicability, high cost performance and the like, the demand of manual injection pumps in the market is continuously improved, so that the deep research on manual control injection pumps is particularly important.
Manually controlled infusion pumps generally include modules such as a drive assembly and a frame assembly. As the transmission part of the core, a motor is usually adopted to drive a screw rod and nut mechanism to realize the feeding of the injector, and then a handle type component is adopted to drive a cam mechanism to realize the meshing and the separation of the nut and the screw rod. Due to the fact that the related movement is large, the transmission route of the force is complex, and the prior art is difficult to achieve good effects in the aspects of transmission interference resistance and structure miniaturization.
Disclosure of Invention
The invention aims to provide a transmission device of a syringe pump and the syringe pump applied by the transmission device, so as to solve the problem of large transmission interference in the prior art.
In order to solve the technical problem, the embodiment of the invention provides a transmission device of an injection pump, which comprises a screw rod, a transmission rod, a guide rod, a driving device, a push head, a transmission slide block and a clutch control mechanism, wherein the screw rod is connected with the transmission rod; the screw rod, the transmission rod and the guide rod are arranged in parallel; the output end of the driving device is connected with the screw, and the driving device is used for driving the screw to rotate; the push head is connected with one end of the transmission rod, and the other end of the transmission rod is connected with the transmission slide block; the transmission sliding block is arranged on the guide rod and can move along the length direction of the guide rod; the clutch control mechanism is used for driving the clutch cam to rotate, and the clutch cam can control the clutch nut to be meshed with and separated from the screw rod through rotation.
The clutch nut is provided with a first waist-shaped through groove; one end of the transmission rod penetrates through the transmission sliding block and the first waist-shaped through groove in sequence and then is connected with the clutch cam, and the clutch cam can rotate by taking the transmission rod as a rotation center.
The clutch nut is provided with a thread surface and a convex block, the thread surface is opposite to the screw rod, the convex block is arranged in a rotating track of the clutch cam, and the convex block and the clutch cam are mutually abutted; the clutch cam can change the abutting position with the lug through rotation so as to control the clutch nut to move towards and away from the screw; the first waist-shaped through groove is internally provided with a first elastic piece, the first elastic piece is arranged between the transmission rod and the end part of the first waist-shaped through groove, one end of the first elastic piece applies force to the transmission rod, and the opposite end of the first elastic piece applies force to the end part of the first waist-shaped through groove.
A shaft sleeve is arranged in the first waist-shaped through groove, and the transmission rod is inserted in the shaft sleeve; the first elastic piece is arranged between the shaft sleeve and the end part of the first waist-shaped through groove, one end of the first elastic piece is abutted to the shaft sleeve, the other end, opposite to the first elastic piece, of the first waist-shaped through groove is abutted to the end part of the first waist-shaped through groove, the surface, abutted to the first elastic piece, of the shaft sleeve is a plane, and the surface, abutted to the first waist-shaped through groove, of the shaft sleeve is a plane.
The clutch nut is also provided with a second waist-shaped through groove, and the second waist-shaped through groove is arranged in parallel with the first waist-shaped through groove; the injection pump transmission device further comprises a positioning piece, and the positioning piece penetrates through the second waist-shaped through groove to be fixedly connected with the transmission sliding block.
The clutch control mechanism comprises a mounting plate, a push rod, a second elastic piece and a switching mechanism; the guide rod penetrates through one side of the mounting plate, the push rod penetrates through the other side, opposite to the mounting plate, and the mounting plate can drive the push rod to move circumferentially around the guide rod; the second elastic piece is used for driving the pushing rod to move towards the clutch cam, and the switching mechanism is used for driving the pushing rod to move away from the clutch cam; or the second elastic piece is used for driving the pushing rod to move away from the clutch cam, and the switching mechanism is used for driving the pushing rod to move towards the clutch cam.
The injection pump transmission device comprises a mounting plate, a guide rod, a photoelectric switch and a transmission device, wherein the mounting plate is provided with a shielding part which can move circumferentially around the guide rod, the transmission device also comprises the photoelectric switch, and an induction area of the photoelectric switch is arranged in a moving track of the shielding part; the shielding part can be arranged in the sensing area of the photoelectric switch when the clutch nut is meshed with the screw rod, and can be arranged outside the sensing area of the photoelectric switch when the clutch nut is separated from the screw rod; or the shielding part can be arranged outside the induction area of the photoelectric switch when the clutch nut is meshed with the screw rod, and the shielding part can also be arranged in the induction area of the photoelectric switch when the clutch nut is separated from the screw rod.
The clutch nut is provided with a first waist-shaped through groove; one end of the transmission rod penetrates through the transmission sliding block and the first waist-shaped through groove in sequence and then is connected with the clutch cam, and the clutch cam can rotate by taking the transmission rod as a rotation center; the clutch nut is provided with a thread surface and a convex block, the thread surface is opposite to the screw rod, the convex block is arranged in the rotating track of the clutch cam, and the convex block is mutually abutted with the clutch cam; the clutch cam can change the abutting position with the lug through rotation so as to control the clutch nut to move towards and away from the screw; a first elastic piece is arranged in the first waist-shaped through groove, the first elastic piece is arranged between the transmission rod and the end part of the first waist-shaped through groove, one end of the first elastic piece applies force to the transmission rod, and the opposite end of the first elastic piece applies force to the end part of the first waist-shaped through groove; the clutch control mechanism comprises a mounting plate, a push rod, a second elastic piece and a switching mechanism; the guide rod penetrates through one side of the mounting plate, the push rod penetrates through the other side, opposite to the mounting plate, and the mounting plate can drive the push rod to move circumferentially around the guide rod; the second elastic piece is used for driving the pushing rod to move towards the clutch cam, and the switching mechanism is used for driving the pushing rod to move away from the clutch cam; or the second elastic piece is used for driving the pushing rod to move away from the clutch cam, and the switching mechanism is used for driving the pushing rod to move towards the clutch cam; the clutch cam is provided with a first protruding portion and a second protruding portion, the first protruding portion is abutted to the protruding block, and the second protruding portion is abutted to the pushing rod.
The guide rod comprises a first guide rod and a second guide rod, the first guide rod is parallel and opposite to the second guide rod, and the first guide rod and the second guide rod are respectively inserted into two sides of the transmission slide block in a penetrating mode.
A syringe pump comprises a shell and the syringe pump transmission device, wherein the syringe pump transmission device is arranged in the shell.
The invention has the following beneficial effects:
the clutch cam can control the clutch nut to be meshed with and separated from the screw rod through rotation, so when the clutch nut is meshed with the screw rod, the rotation energy of the screw rod is changed into the movement of the clutch nut, the push head is connected with one end of the transmission rod, the other end of the transmission rod is connected with the transmission slide block, and the push head can move along with the clutch nut; obviously, the screw rod transmits power to the clutch nut through rotation, the clutch nut can directly drive the push head to advance and push out, the power transmission route is simple, the transmission anti-interference performance is greatly improved, the structure is simple, and important help is provided for the miniaturization of the structure.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a syringe pump transmission according to a preferred embodiment of the present invention;
FIG. 2 is a partially disassembled schematic view of a syringe pump transmission provided in accordance with a preferred embodiment of the present invention;
FIG. 3 is a schematic view of the engagement state of the screw and the clutch nut provided by the preferred embodiment of the invention;
fig. 4 is a schematic diagram of a state that the screw and the clutch nut are separated according to the preferred embodiment of the invention.
The reference numbers are as follows:
01. a screw;
021. a transmission rod; 022. a hollow tube;
031. a first guide bar; 032. a second guide bar;
041. a motor; 042. a gear set;
05. pushing the head;
06. a transmission slide block;
071. mounting a plate; 0711. a shielding portion; 072. a push rod;
08. a clutch nut; 081. a first kidney-shaped through slot; 082. a second kidney-shaped through slot; 083. a thread face; 084. a bump;
09. a clutch cam; 091. a first projecting portion; 092. a second projection;
101. a first elastic member; 102. a second elastic member;
11. a shaft sleeve;
12. a positioning member;
13. a photoelectric switch;
14. a control key;
15. a clamping jaw.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
As can be seen from fig. 1 to 4, the syringe pump transmission device according to the embodiment of the present invention includes a screw 01, a transmission rod 021, a guide rod, a driving device, a pusher 05, a transmission slider 06, and a clutch control mechanism; the screw rod 01, the transmission rod 021 and the guide rod are arranged in parallel; the output end of the driving device is connected with the screw 01, and the driving device is used for driving the screw 01 to rotate; the push head 05 is connected with one end of the transmission rod 021, and the other end of the transmission rod 021 is connected with the transmission sliding block 06; the transmission slide block 06 is arranged on the guide rod, and the transmission slide block 06 can move along the length direction of the guide rod; the transmission sliding block 06 is provided with a clutch nut 08 and a clutch cam 09 which are mutually abutted, the clutch control mechanism is used for driving the clutch cam 09 to rotate, and the clutch cam 09 can control the clutch nut 08 to be engaged with and disengaged from the screw rod 01 through rotation.
Assuming that the engagement of the screw 01 with the coupling nut 08 is the default operating state, with reference to fig. 1 to 4, the following operation is possible:
1. starting a driving device to drive the screw rod 01 to rotate;
2. under the drive of the screw rod 01, the clutch nut 08 is subjected to a rightward acting force, so that the clutch cam 09, the clutch nut 08, the transmission slider 06, the transmission rod 021 and the push head 05 move rightward together, and the push head 05 is pushed out;
3. the clutch cam 09 is controlled to rotate through the clutch control mechanism, as shown in fig. 4, at this time, the clutch cam 09 rotates clockwise, and drives the clutch nut 08 to separate from the screw 01;
4. at this time, the pushing head 05 can be manually pushed back to the original position, then the clutch cam 09 is controlled to rotate by the clutch control mechanism, as shown in fig. 3, at this time, the clutch cam 09 rotates counterclockwise and drives the clutch nut 08 to engage with the screw rod 01, and the above steps 1 and 2 can be repeated again to push out the pushing head 05 again.
Obviously, the screw 01 transmits power to the clutch nut 08 through rotation, the clutch nut 08 can directly drive the push head 05 to advance and push out, the power transmission route is simple, the transmission anti-interference performance is greatly improved, the structure is simple, and important help is provided for the miniaturization of the structure.
In addition, as shown in fig. 1, the driving device may include a motor 041 and a gear set 042, the motor 041 outputs power to drive the gear set 042 to rotate, and then the gear set 042 drives the screw 01 to rotate, and since the combination mode of the gear set 042 is not unique, adaptive adjustment may be performed according to different environments, which brings convenience to production and design.
Furthermore, the number of the guide rods is not limited, and when the number of the guide rods is two or more, as long as each guide rod is arranged in parallel and passes through the transmission slide block 06, the moving path of the transmission slide block 06 can be limited; when the number of guide bars is one, the guide bars are required to be arranged in the shape of a rectangular column and the like, so that the guide bars are prevented from being arranged in a cylindrical shape, and the transmission slide block 06 is prevented from swinging on the guide bars.
An improvement of the syringe pump transmission according to the embodiment of the present invention may be seen in fig. 2 to 4, wherein a first kidney-shaped through groove 081 is formed on the clutch nut 08; one end of the transmission rod 021 passes through the transmission slider 06 and the first kidney-shaped through groove 081 in sequence and then is coupled with the clutch cam 09, and the clutch cam 09 can rotate by taking the transmission rod 021 as a rotation center.
That is, the transmission rod 021 simultaneously realizes a plurality of functions:
1. the power transmission between the transmission slide block 06 and the push head 05 is realized so as to control the movement of the push head 05;
2. the mounting position of the clutch nut 08 is fixed, and the clutch nut 08 can only move in a limited range under the mutual limitation of the first kidney-shaped through groove 081 and the transmission rod 021;
3. the installation position of the clutch cam 09 is fixed, and the rotation of the clutch cam 09 is realized at the same time.
Therefore, the structure greatly improves the compactness of the structure and provides important help for the miniaturization of the structure.
When the end part of the transmission rod 021 is cylindrical, the clutch cam 09 is provided with a circular through hole, so that the clutch cam 09 can rotate after the transmission rod 021 and the clutch cam 09 are assembled; when the end of the transmission rod 021 is non-cylindrical, such as a rectangular column, the clutch cam 09 should be provided with a rectangular through hole, and the transmission rod 021 can rotate, so that the transmission rod 021 can rotate after the transmission rod 021 and the clutch cam 09 are assembled, and it is further pointed out that the hollow tube 022 can be additionally arranged outside the transmission rod 021 so that the transmission rod 021 can rotate more smoothly.
In addition, in order to limit the moving path of the clutch nut 08, the part of the transmission rod 021 inserted into the first kidney-shaped groove is provided with two planes which are parallel relatively, and the two planes are respectively abutted against the two plane groove walls of the first kidney-shaped groove, so that the clutch nut 08 can only move back and forth along a specified path.
As shown in fig. 3 and 4, a modification of the syringe pump transmission device according to the embodiment of the present invention may be that the clutch nut 08 is provided with a thread surface 083 and a bump 084, where the thread surface 083 is opposite to the screw rod 01, the bump 084 is disposed in a rotation track of the clutch cam 09, and the bump 084 and the clutch cam 09 abut against each other; the clutch cam 09 can change the abutting position with the bump 084 through rotation to control the clutch nut 08 to move towards and away from the screw 01; a first elastic member 101 is disposed in the first kidney-shaped through slot 081, the first elastic member 101 is disposed between the transmission rod 021 and an end of the first kidney-shaped through slot 081, one end of the first elastic member 101 applies force to the transmission rod 021, and an opposite end of the first elastic member 101 applies force to the end of the first kidney-shaped through slot 081.
Specifically, there are four cases:
1. referring to fig. 3 and 4, the thread surface 083 is disposed on the left side surface of the clutch nut 08, the bump 084 is disposed on the right side of the front surface of the clutch nut 08, and the first elastic member 101 is assumed to be a spring disposed between the left end of the first kidney-shaped through slot 081 and the transmission rod 021; when the clutch cam 09 rotates clockwise, the clutch cam 09 applies a pushing force towards the upper right to the bump 084, so that the clutch nut 08 is driven to move towards the upper right, the separation of the thread surface 083 and the screw rod 01 is realized, and at the moment, the spring is in an extruded state; when the clutch cam 09 rotates anticlockwise, the thrust exerted by the clutch cam 09 on the bump 084 is gradually reduced, the spring exerts the thrust on the left end of the first kidney-shaped through groove 081 to restore the elastic deformation, so that the clutch nut 08 moves towards the screw rod 01, and the meshing of the thread surface 083 and the screw rod 01 is realized;
2. assuming that the thread surface 083 is arranged on the left side surface of the clutch nut 08, the bump 084 is arranged on the right side of the front surface of the clutch nut 08, and assuming that the first elastic member 101 is a tension spring, the tension spring is arranged between the right end of the first kidney-shaped through groove 081 and the transmission rod 021; when the clutch cam 09 rotates clockwise, the clutch cam 09 applies a pushing force towards the upper right to the bump 084, so that the clutch nut 08 is driven to move towards the upper right, the separation of the thread surface 083 and the screw rod 01 is realized, and at the moment, the tension spring is in a stretched state; when the clutch cam 09 rotates anticlockwise, the pushing force exerted by the clutch cam 09 on the bump 084 is gradually reduced, the tension spring exerts pulling force on the right end of the first kidney-shaped through groove 081 for restoring elastic deformation, so that the clutch nut 08 moves towards the screw rod 01, and the meshing of the thread surface 083 and the screw rod 01 is realized;
3. assuming that the thread surface 083 is arranged on the left side surface of the clutch nut 08, the bump 084 is arranged on the left side of the front surface of the clutch nut 08, and assuming that the first elastic member 101 is a tension spring, the tension spring is arranged between the left end of the first kidney-shaped through groove 081 and the transmission rod 021; when the clutch cam 09 rotates counterclockwise, the clutch cam 09 applies a pushing force towards the left lower direction to the bump 084, so that the clutch nut 08 is driven to move towards the left lower direction, the meshing of the thread surface 083 and the screw rod 01 is realized, and the tension spring is in a stretched state; when the clutch cam 09 rotates clockwise, the pushing force applied by the clutch cam 09 to the bump 084 is gradually reduced, and the tension spring applies pulling force to the left end of the first kidney-shaped through groove 081 to restore elastic deformation, so that the clutch nut 08 moves away from the screw rod 01, and the clutch nut 08 is separated from the screw rod 01;
4. assuming that the thread surface 083 is arranged on the left side surface of the clutch nut 08, the bump 084 is arranged on the left side of the front surface of the clutch nut 08, and assuming that the first elastic member 101 is a spring, the spring is arranged between the right end of the first kidney-shaped through groove 081 and the transmission rod 021; when the clutch cam 09 rotates counterclockwise, the clutch cam 09 applies a pushing force towards the left lower direction to the bump 084, so that the clutch nut 08 is driven to move towards the left lower direction, the meshing of the thread surface 083 and the screw rod 01 is realized, and the spring is in a state of being extruded at the moment; when the clutch cam 09 rotates clockwise, the thrust exerted by the clutch cam 09 on the bump 084 is gradually reduced, and the spring exerts the thrust on the right end of the first kidney-shaped through groove 081 for restoring the elastic deformation, so that the clutch nut 08 moves away from the screw rod 01, and the clutch nut 08 is separated from the screw rod 01.
The first elastic member 101 is not limited to a spring or a tension spring, and other members having the same physical properties, such as rubber, may be used.
An improvement of the syringe pump transmission device according to the embodiment of the present invention can be seen from fig. 2, a shaft sleeve 11 is disposed in the first kidney-shaped through slot 081, and the transmission rod 021 is inserted into the shaft sleeve 11; the first elastic element 101 is disposed between the shaft sleeve 11 and the end of the first kidney-shaped through slot 081, one end of the first elastic element 101 abuts against the shaft sleeve 11, the other end, opposite to the first elastic element 101, abuts against the end of the first kidney-shaped through slot 081, the surface of the shaft sleeve 11 abutting against the first elastic element 101 is a plane, and the surface of the shaft sleeve 11 abutting against the first kidney-shaped through slot 081 is a plane.
Since the surface of the shaft sleeve 11 abutting against the first elastic member 101 is a plane, the shaft sleeve 11 and the first elastic member 101 are easy to mount and the mounting position is not easy to shift; in addition, since the surface of the sleeve 11 abutting against the first kidney-shaped through slot 081 is a plane, the sleeve 11 does not rotate in the first kidney-shaped through slot 081, and the rotation of the sleeve 11 is prevented from affecting the positioning of the first elastic member 101.
As shown in fig. 2, a second kidney-shaped through groove 082 is further disposed on the clutch nut 08, and the second kidney-shaped through groove 082 is disposed in parallel with the first kidney-shaped through groove 081; the injection pump transmission device further comprises a positioning piece 12, and the positioning piece 12 penetrates through the second kidney-shaped through groove 082 to be fixedly connected with the transmission slide block 06.
At this time, the first kidney-shaped through groove 081 and the transmission rod 021 define a first moving track of the clutch nut 08, the second kidney-shaped through groove 082 and the positioning piece 12 define a second moving track of the clutch nut 08, and the two moving tracks are parallel to each other, so that the clutch nut 08 can only move back and forth on a defined straight line, and the influence on the meshing accuracy of the clutch nut 08 due to the shift of the moving tracks is avoided.
The positioning element 12 may be a strip-shaped body, a block-shaped body, or the like as long as it can pass through the second kidney-shaped through groove 082, and a screw used in industrial design can be used as the positioning element 12.
A modification of the syringe pump transmission device according to the embodiment of the present invention can be seen in fig. 1 to 4, wherein the clutch control mechanism includes a mounting plate 071, a push rod 072, a second elastic member 102 and a switching mechanism; the guide rod penetrates through one side of the mounting plate 071, the push rod 072 penetrates through the other side opposite to the mounting plate 071, and the mounting plate 071 can drive the push rod 072 to move circumferentially around the guide rod; the second elastic part 102 is used for driving the push rod 072 to move towards the clutch cam 09, and the switching mechanism is used for driving the push rod 072 to move away from the clutch cam 09; or the second elastic member 102 is used for driving the push rod 072 to move away from the clutch cam 09, and the switching mechanism is used for driving the push rod 072 to move towards the clutch cam 09.
Assuming that the threaded surface 083 is disposed on the left side surface of the clutch nut 08, the bump 084 is disposed on the right side of the front surface of the clutch nut 08, and a spring is disposed between the left end of the first kidney-shaped through slot 081 and the transmission rod 021, there are at least four cases:
1. as shown in fig. 3 and 4, the second elastic member 102 is a spring, the spring is disposed at the lower right side of the push rod 072, and in the initial state, the spring applies a pushing force to the push rod 072 towards the upper left direction, i.e. the push rod 072 rotates clockwise, so that the clutch cam 09 rotates counterclockwise, and the clutch nut 08 is engaged with the screw 01; at this time, the control switching mechanism drives the pushing rod 072 to move away from the clutch cam 09, namely, the pushing rod 072 rotates anticlockwise, so that the clutch cam 09 can rotate clockwise, and the clutch nut 08 is separated from the screw rod 01;
2. assuming that the second elastic member 102 is a tension spring, the tension spring is disposed at the upper left of the push rod 072, and in an initial state, the tension spring applies a tension force to the push rod 072 towards the upper left, i.e. the push rod 072 moves clockwise, so that the clutch cam 09 rotates counterclockwise, and the clutch nut 08 is engaged with the screw rod 01; at this time, the control switching mechanism drives the pushing rod 072 to move away from the clutch cam 09, namely, the pushing rod 072 rotates anticlockwise, so that the clutch cam 09 can rotate clockwise, and the clutch nut 08 is separated from the screw rod 01;
3. assuming that the second elastic member 102 is a tension spring, the tension spring is disposed on the upper right side of the push rod 072, and in an initial state, the tension spring applies a tension force to the push rod 072 toward the upper right side, that is, the push rod 072 rotates counterclockwise, so that the clutch cam 09 can rotate clockwise, and the clutch nut 08 and the screw rod 01 are separated; at this time, the control switching mechanism drives the pushing rod 072 to move towards the clutch cam 09, namely, the pushing rod 072 rotates clockwise, so that the clutch cam 09 rotates anticlockwise, and the clutch nut 08 is meshed with the screw rod 01;
4. assuming that the second elastic member 102 is a spring, the spring is disposed at the lower left of the push rod 072, and in the initial state, the spring applies a pushing force to the push rod 072 toward the upper right, i.e., the push rod 072 rotates counterclockwise, so that the clutch cam 09 can rotate clockwise, and the clutch nut 08 and the screw 01 can be separated; at this time, the control switching mechanism drives the pushing rod 072 to move towards the clutch cam 09, namely, the pushing rod 072 rotates clockwise, so that the clutch cam 09 rotates anticlockwise, and the clutch nut 08 is meshed with the screw rod 01.
In addition, the following points are also pointed out:
1. the second elastic member 102 does not need to apply force to the push rod 072 directly, and can apply force to the mounting plate 071 to enable the push rod 072 to rotate along with the mounting plate 071;
2. the second elastic member 102 is not limited to a spring and a tension spring, and other members having the same physical properties, such as rubber, may be used;
3. the switching mechanism does not need to directly apply force to the push rod 072, and can apply force to the mounting plate 071 to enable the push rod 072 to move along with the mounting plate 071, or apply force to the second elastic member 102, and control the contraction and extension of the second elastic member 102 to realize the circumferential movement of the push rod 072;
4. as shown in fig. 1, a control button 14 and a clamping jaw 15 can be further arranged on the pushing head 05, the control button 14 can control the opening and closing of the clamping jaw 15, the opening and closing of the clamping jaw 15 can control the force applying state of the switching mechanism to the pushing rod 072, and even the user can control the meshing state of the screw rod 01 and the clutch nut 08.
An improvement of the syringe pump transmission device according to the embodiment of the present invention can be seen in fig. 1, 3 and 4, the mounting plate 071 is provided with a shielding portion 0711, the shielding portion 0711 can move circumferentially around the guide rod, the syringe pump transmission device further includes a photoelectric switch 13, and a sensing area of the photoelectric switch 13 is placed in a moving track of the shielding portion 0711; the shielding part 0711 can be placed in the sensing area of the photoelectric switch 13 when the clutch nut 08 is engaged with the screw 01, and the shielding part 0711 can also be placed outside the sensing area of the photoelectric switch 13 when the clutch nut 08 is disengaged from the screw 01; or the shielding part 0711 can be placed outside the sensing area of the photoelectric switch 13 when the clutch nut 08 is engaged with the screw 01, and the shielding part 0711 can also be placed in the sensing area of the photoelectric switch 13 when the clutch nut 08 is disengaged from the screw 01.
The shielding part 0711 can be a sheet-shaped body integrally formed with the mounting plates 071, and since two or more mounting plates 071 can be arranged to ensure the stable mounting of the push rod 072, the shielding part 0711 only needs to be arranged on one of the mounting plates 071 at this time; obviously, by detecting whether the shielding portion 0711 is disposed in the sensing area of the photoelectric switch 13, it can be determined whether the clutch nut 08 and the screw 01 are engaged, so that the related circuit can perform accurate control, for example, when it is known that the clutch nut 08 and the screw 01 are in the disengaged state, the driving device is prohibited from operating, and the loss caused by the idle rotation of the related motor 041 can be avoided.
An improvement of the syringe pump transmission device according to the embodiment of the present invention may be as shown in fig. 1 to 4, wherein a first kidney-shaped through groove 081 is formed on the clutch nut 08; one end of the transmission rod 021 passes through the transmission slider 06 and the first kidney-shaped through groove 081 in sequence and then is coupled with the clutch cam 09, and the clutch cam 09 can rotate by taking the transmission rod 021 as a rotation center; the clutch nut 08 is provided with a thread surface 083 and a bump 084, the thread surface 083 is opposite to the screw rod 01, the bump 084 is arranged in a rotating track of the clutch cam 09, and the bump 084 is abutted to the clutch cam 09; the clutch cam 09 can change the abutting position with the bump 084 through rotation to control the clutch nut 08 to move towards and away from the screw 01; a first elastic member 101 is disposed in the first kidney-shaped through slot 081, the first elastic member 101 is disposed between the transmission rod 021 and an end of the first kidney-shaped through slot 081, one end of the first elastic member 101 applies force to the transmission rod 021, and an opposite end of the first elastic member 101 applies force to the end of the first kidney-shaped through slot 081; the clutch control mechanism comprises a mounting plate 071, a push rod 072, a second elastic piece 102 and a switching mechanism; the guide rod penetrates through one side of the mounting plate 071, the push rod 072 penetrates through the other side opposite to the mounting plate 071, and the mounting plate 071 can drive the push rod 072 to move circumferentially around the guide rod; the second elastic part 102 is used for driving the push rod 072 to move towards the clutch cam 09, and the switching mechanism is used for driving the push rod 072 to move away from the clutch cam 09; or the second elastic part 102 is used for driving the push rod 072 to move away from the clutch cam 09, and the switching mechanism is used for driving the push rod 072 to move towards the clutch cam 09; the clutch cam 09 is provided with a first protrusion 091 and a second protrusion 092, the first protrusion 091 abuts against the bump 084, and the second protrusion 092 abuts against the push rod 072.
Then there can be at least two cases:
1. as shown in fig. 3 and 4, the thread surface 083 is disposed on the left side surface of the clutch nut 08, the bump 084 is disposed on the right side of the front surface of the clutch nut 08, the first elastic member 101 is disposed between the left end of the first kidney-shaped through groove 081 and the transmission rod 021, the first elastic member 101 is a spring, the first protrusion 091 is disposed on the right side of the upper portion of the clutch cam 09, the second protrusion 092 is disposed on the right side of the lower portion of the clutch cam 09, and the push rod 072 is disposed on the lower right side of the clutch cam 09; when the push rod 072 moves clockwise, the push rod 072 applies an upward pushing force to the second protrusion portion 092, so that the clutch cam 09 rotates counterclockwise, the pushing force applied to the bump 084 by the first protrusion portion 091 is reduced, and the meshing of the thread face 083 and the screw rod 01 is realized; when the push rod 072 moves counterclockwise, the push rod 072 reduces the pushing force applied to the second protrusion portion 092, so that the clutch cam 09 rotates clockwise, the pushing force applied to the bump 084 by the first protrusion portion 091 is increased, and the separation of the thread face 083 and the screw rod 01 is realized;
2. assuming that the thread surface 083 is arranged on the left side surface of the clutch nut 08, the bump 084 is arranged on the left side of the front surface of the clutch nut 08, the first elastic member 101 is arranged between the left end of the first kidney-shaped through groove 081 and the transmission rod 021, the first elastic member 101 is a tension spring, the first protrusion 091 is arranged on the left side of the upper part of the clutch cam 09, the second protrusion 092 is arranged on the right side of the lower part of the clutch cam 09, and the push rod 072 is arranged on the lower right side of the clutch cam 09; when the push rod 072 moves clockwise, the push rod 072 applies an upward pushing force to the second protrusion portion 092, so that the clutch cam 09 rotates counterclockwise, the pushing force applied to the bump 084 by the first protrusion portion 091 is increased, and the meshing of the thread face 083 and the screw rod 01 is realized; when the push rod 072 moves counterclockwise, the push rod 072 reduces the pushing force applied to the second protrusion 092, so that the clutch cam 09 rotates clockwise, i.e., the first protrusion 091 reduces the pushing force applied to the bump 084, thereby achieving the separation of the thread face 083 from the screw rod 01.
For example, in order to enhance the automatic resetting capability of the clutch cam 09, the center of gravity of the clutch cam 09 may be set to be biased toward the second protrusion 092, and if the distance that the second protrusion 092 extends outward is set to be greater than the distance that the first protrusion 091 extends outward, the volume of the second protrusion 092 is set to be greater than the volume of the first protrusion 091, and the like, if the pushing force applied by the pushing rod 072 is reduced, the clutch cam 09 can be rotationally reset due to its own gravity.
An improvement of the syringe pump transmission device according to the embodiment of the present invention can be seen from fig. 1, 3 and 4, wherein the guide rod includes a first guide rod 031 and a second guide rod 032, the first guide rod 031 and the second guide rod 032 are parallel and opposite, and the first guide rod 031 and the second guide rod 032 are respectively inserted into two sides of the transmission slider 06.
Since the installation of the driving slider 06 may be unstable due to only one guide rod, the installation stability of the driving slider 06 can be improved by simultaneously providing the first guide rod 031 and the second guide rod 032, and the driving slider 06 can be limited to move back and forth only in a linear direction.
The injection pump comprises a shell and the injection pump transmission device, wherein the injection pump transmission device is arranged in the shell.
In a similar way, after the injection pump transmission device is used, the screw rod 01 transmits power to the clutch nut 08 through rotation, the clutch nut 08 can directly drive the push head 05 to advance and push out, the power transmission route is simple, the transmission anti-interference performance is greatly improved, the structure is simple, and important help is provided for the miniaturization of the structure.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (8)
1. A transmission device of a syringe pump is characterized in that,
comprises a screw rod, a transmission rod, a guide rod, a driving device, a pushing head, a transmission sliding block and a clutch control mechanism;
the screw rod, the transmission rod and the guide rod are arranged in parallel;
the output end of the driving device is connected with the screw, and the driving device is used for driving the screw to rotate;
the push head is connected with one end of the transmission rod, and the other end of the transmission rod is connected with the transmission slide block;
the transmission sliding block is arranged on the guide rod and can move along the length direction of the guide rod;
the transmission sliding block is provided with a clutch nut and a clutch cam which are mutually abutted, the clutch control mechanism is used for driving the clutch cam to rotate, and the clutch cam can control the clutch nut to be meshed with and separated from the screw rod through rotation;
a first waist-shaped through groove is formed in the clutch nut; one end of the transmission rod penetrates through the transmission sliding block and the first waist-shaped through groove in sequence and then is connected with the clutch cam, and the clutch cam can rotate by taking the transmission rod as a rotation center;
the clutch nut is provided with a thread surface and a convex block, the thread surface is opposite to the screw rod, the convex block is arranged in the rotating track of the clutch cam, and the convex block is mutually abutted with the clutch cam; the clutch cam can change the abutting position with the lug through rotation so as to control the clutch nut to move towards and away from the screw;
the first waist-shaped through groove is internally provided with a first elastic piece, the first elastic piece is arranged between the transmission rod and the end part of the first waist-shaped through groove, one end of the first elastic piece applies force to the transmission rod, and the opposite end of the first elastic piece applies force to the end part of the first waist-shaped through groove.
2. Syringe pump transmission according to claim 1,
a shaft sleeve is arranged in the first waist-shaped through groove, and the transmission rod is inserted in the shaft sleeve;
the first elastic piece is arranged between the shaft sleeve and the end part of the first waist-shaped through groove, one end of the first elastic piece is abutted to the shaft sleeve, the other end, opposite to the first elastic piece, of the first waist-shaped through groove is abutted to the end part of the first waist-shaped through groove, the surface, abutted to the first elastic piece, of the shaft sleeve is a plane, and the surface, abutted to the first waist-shaped through groove, of the shaft sleeve is a plane.
3. Syringe pump transmission according to claim 1,
the clutch nut is also provided with a second waist-shaped through groove which is arranged in parallel with the first waist-shaped through groove;
the injection pump transmission device further comprises a positioning piece, and the positioning piece penetrates through the second waist-shaped through groove to be fixedly connected with the transmission sliding block.
4. Syringe pump transmission according to any one of claims 1 to 3,
the clutch control mechanism comprises a mounting plate, a push rod, a second elastic piece and a switching mechanism;
the guide rod penetrates through one side of the mounting plate, the push rod penetrates through the other side, opposite to the mounting plate, and the mounting plate can drive the push rod to move circumferentially around the guide rod;
the second elastic piece is used for driving the pushing rod to move towards the clutch cam, and the switching mechanism is used for driving the pushing rod to move away from the clutch cam;
or the second elastic piece is used for driving the pushing rod to move away from the clutch cam, and the switching mechanism is used for driving the pushing rod to move towards the clutch cam.
5. Syringe pump transmission according to claim 4,
the mounting plate is provided with a shielding part which can move circumferentially around the guide rod, the injection pump transmission device further comprises a photoelectric switch, and an induction area of the photoelectric switch is arranged in a moving track of the shielding part;
the shielding part can be arranged in the sensing area of the photoelectric switch when the clutch nut is meshed with the screw rod, and can be arranged outside the sensing area of the photoelectric switch when the clutch nut is separated from the screw rod;
or the shielding part can be arranged outside the induction area of the photoelectric switch when the clutch nut is meshed with the screw rod, and the shielding part can also be arranged in the induction area of the photoelectric switch when the clutch nut is separated from the screw rod.
6. Syringe pump transmission according to claim 1,
a first waist-shaped through groove is formed in the clutch nut; one end of the transmission rod penetrates through the transmission sliding block and the first waist-shaped through groove in sequence and then is connected with the clutch cam, and the clutch cam can rotate by taking the transmission rod as a rotation center;
the clutch nut is provided with a thread surface and a convex block, the thread surface is opposite to the screw rod, the convex block is arranged in the rotating track of the clutch cam, and the convex block is mutually abutted with the clutch cam; the clutch cam can change the abutting position with the lug through rotation so as to control the clutch nut to move towards and away from the screw; a first elastic piece is arranged in the first waist-shaped through groove, the first elastic piece is arranged between the transmission rod and the end part of the first waist-shaped through groove, one end of the first elastic piece applies force to the transmission rod, and the opposite end of the first elastic piece applies force to the end part of the first waist-shaped through groove;
the clutch control mechanism comprises a mounting plate, a push rod, a second elastic piece and a switching mechanism; the guide rod penetrates through one side of the mounting plate, the push rod penetrates through the other side, opposite to the mounting plate, and the mounting plate can drive the push rod to move circumferentially around the guide rod; the second elastic piece is used for driving the pushing rod to move towards the clutch cam, and the switching mechanism is used for driving the pushing rod to move away from the clutch cam; or the second elastic piece is used for driving the pushing rod to move away from the clutch cam, and the switching mechanism is used for driving the pushing rod to move towards the clutch cam;
the clutch cam is provided with a first protruding portion and a second protruding portion, the first protruding portion is abutted to the protruding block, and the second protruding portion is abutted to the pushing rod.
7. The syringe pump transmission of claim 1, wherein the guide rod comprises a first guide rod and a second guide rod, the first guide rod is parallel and opposite to the second guide rod, and the first guide rod and the second guide rod are respectively inserted on two sides of the transmission slide block.
8. A syringe pump comprising a housing and a syringe pump drive of any one of claims 1 to 7, said syringe pump drive being disposed within said housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710477530.9A CN107362411B (en) | 2017-06-21 | 2017-06-21 | Injection pump transmission device and injection pump applying same |
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| CN201710477530.9A CN107362411B (en) | 2017-06-21 | 2017-06-21 | Injection pump transmission device and injection pump applying same |
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| CN107362411A CN107362411A (en) | 2017-11-21 |
| CN107362411B true CN107362411B (en) | 2020-06-16 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109011230B (en) * | 2018-08-17 | 2024-04-12 | 深圳市中恒美有限公司 | Automatic focusing ultrasonic beauty pen |
| CN109481782A (en) * | 2018-12-29 | 2019-03-19 | 深圳市好克医疗仪器股份有限公司 | Syringe pump |
| CN109621080B (en) * | 2019-01-30 | 2023-09-15 | 深圳中科生物医疗电子有限公司 | Infusion pump |
| CN109621081B (en) * | 2019-01-30 | 2023-12-08 | 深圳中科生物医疗电子有限公司 | Infusion pump with different-speed clutch mechanism |
| CN111135885B (en) * | 2020-01-14 | 2021-10-26 | 安徽奇书生物科技有限公司 | Variable injection slide block |
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| CN2647325Y (en) * | 2003-09-02 | 2004-10-13 | 北京鑫禾丰医疗技术有限公司 | Micro-injection pump propelling mechanism |
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| CN103203057A (en) * | 2012-01-12 | 2013-07-17 | 深圳玉升医疗科技有限公司 | Clutch device and injection pump |
| CN105727394A (en) * | 2016-01-29 | 2016-07-06 | 深圳麦科田生物医疗技术有限公司 | Injection pump and transmission device thereof |
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| CN2647325Y (en) * | 2003-09-02 | 2004-10-13 | 北京鑫禾丰医疗技术有限公司 | Micro-injection pump propelling mechanism |
| CN103203057A (en) * | 2012-01-12 | 2013-07-17 | 深圳玉升医疗科技有限公司 | Clutch device and injection pump |
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| CN107362411A (en) | 2017-11-21 |
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Address after: 518000 12th floor, building 1, Baiwang R & D building, 5158 xilishahe West Road, Nanshan District, Shenzhen City, Guangdong Province Patentee after: Shenzhen maiketian Biomedical Technology Co.,Ltd. Address before: 518000 12th floor, building 1, Baiwang R & D building, 5158 xilishahe West Road, Nanshan District, Shenzhen City, Guangdong Province Patentee before: Medcaptain Medical Technology Co.,Ltd. |