CN-122008040-A - Three-face automatic indexing polishing device for minimally invasive infusion needle

CN122008040ACN 122008040 ACN122008040 ACN 122008040ACN-122008040-A

Abstract

The invention discloses a three-face automatic indexing polishing device for a minimally invasive infusion needle, which belongs to the technical field of medical instrument processing equipment and comprises a fixed seat, a rotary disc, a rotary motor and three polishing mechanisms. The edge of the rotary disk is provided with a needle clamping mechanism, one end of the needle clamping mechanism is fixed with a regular triangular prism-shaped index stop block, and the other end of the needle clamping mechanism is provided with a clamping part. The boss is provided with three indexing convex rods, the three indexing convex rods and the three polishing mechanisms are alternately arranged along the circumference, and when the indexing stop block rotates along with the rotary disc and is abutted against the indexing convex rods, the needle clamping shaft is forced to rotate for 120 degrees, so that automatic indexing is realized. The invention adopts the mechanical interference of the regular triangular prism-shaped indexing block and the indexing convex rod to realize 120-degree automatic indexing, has simple and visual structure, reliable action, low manufacturing cost and convenient maintenance, can independently finish the high-precision polishing of a single needle body, and is suitable for the scenes of research and development trial production, process debugging, small-batch customization and the like.

Inventors

WANG YANG
ZHANG YONGPING
YU YONGWEI
Qiu Lujie
LI XIKUN
GUO SITAI
GAO ZHAOBING

Assignees

江苏省艾格森数控设备制造有限公司
江苏泰合医疗科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260327

Claims (10)

1. The three-face automatic indexing polishing device for the minimally invasive infusion needle comprises a fixed seat, a rotary disc, a rotary motor and three polishing mechanisms, and is characterized in that a boss is arranged at the upper end of the fixed seat, the rotary disc is rotationally connected to the top end of the boss and driven by the rotary motor, at least one radially arranged needle clamping mechanism is arranged at the edge of the rotary disc, the needle clamping mechanism comprises a needle clamping seat and a needle clamping assembly, the needle clamping seat is connected with the rotary disc, the needle clamping assembly comprises a needle clamping shaft rotationally connected with the needle clamping seat and an index stop block which is coaxially fixed at one end of the needle clamping shaft and is in a regular triangular prism shape, a clamping part for clamping the minimally invasive infusion needle is arranged at the other end of the needle clamping shaft, three indexing convex rods are fixedly arranged on the boss, three polishing mechanisms are distributed at the outer side of the rotary disc at intervals, the three indexing convex rods and the three polishing mechanisms are alternately arranged along the circumference, and when the index stop block is forced to abut against any one indexing convex rod along with the rotary disc, and the index stop block is forced to drive the needle clamping shaft to rotate 120 degrees.
2. The three-sided automatic indexing polishing device of the minimally invasive infusion needle of claim 1, wherein the three vertex angles of one side of the indexing block, which is far away from the needle clamping shaft, are respectively connected with a roller in a rotating way, an arc-shaped guide rail is arranged between every two indexing convex rods on the boss, the starting end of the arc-shaped guide rail is a ramp surface, and when the indexing block finishes indexing rotation, the rollers are in rolling fit with the arc-shaped guide rail.
3. The three-sided automatic indexing polishing device of the minimally invasive infusion needle is characterized in that the clamping part comprises a positioning groove arranged at the end part of the needle clamping shaft, a clamping groove adjacent to the positioning groove and a clamp rotationally connected to the needle clamping shaft through a fixed shaft, a jaw of the clamp corresponds to the clamping groove, and a spring is connected between the tail part of the clamp and the needle clamping shaft, so that the jaw has a tendency of closing into the clamping groove.
4. The three-sided automatic indexing polishing device of the minimally invasive infusion needle of claim 1, wherein the polishing mechanism comprises a base and a movable seat, one side of the movable seat, which is far away from the rotary disc, is rotationally connected with the base through a first rotary shaft, a polishing assembly is arranged on the movable seat, and an auxiliary clamping seat for fixing a workpiece during polishing and an inclination angle adjusting assembly for driving the movable seat to rotate around the first rotary shaft to adjust the inclination angle of the movable seat are arranged on the base.
5. A three-sided automatic indexing polishing device for a minimally invasive infusion needle as set forth in claim 4, wherein the polishing assembly comprises a first slide plate, a second slide plate, a polishing wheel and a polishing motor for driving the polishing wheel to rotate, wherein the first slide plate is movable relative to the movable seat in the radial direction of the rotary disc, the second slide plate is movable relative to the first slide plate in the direction perpendicular to the radial direction, and the polishing wheel is arranged on the second slide plate.
6. The three-sided automatic indexing polishing device of a minimally invasive infusion needle of claim 5, wherein the movable seat is provided with a first driving motor and a second driving motor, an output shaft of the first driving motor is connected with a first eccentric part, the first eccentric part is hinged with a first sliding plate to drive the first sliding plate to move, an output shaft of the second driving motor is connected with a second eccentric part, and the second eccentric part is hinged with the second sliding plate to drive the second sliding plate to move.
7. The three-sided automatic indexing polishing device of a minimally invasive infusion needle of claim 5, wherein the second sliding plate is provided with a lifting adjusting assembly for adjusting the height of the polishing wheel, the lifting adjusting assembly comprises a supporting rod, a swinging arm and a linear driver, the supporting rod is arranged on the second sliding plate, one end of the swinging arm is rotatably connected to the top end of the supporting rod through a second rotating shaft, the other end of the swinging arm is connected with the polishing wheel, and the linear driver is connected between the second sliding plate and the swinging arm and used for driving the swinging arm to swing around the second rotating shaft.
8. The three-sided automatic indexing polishing device of a minimally invasive infusion needle of claim 4, wherein the inclination angle adjusting assembly comprises a screw rod, a base sliding block and a driving piece, the screw rod is rotationally connected to the base along the radial direction of the rotary disc and is driven to rotate by the driving piece, the base sliding block is in threaded connection with the screw rod and is in sliding connection with the base, an inclined slope surface and a guide groove are formed in the upper portion of the base sliding block, a guide protruding block in sliding fit with the guide groove is arranged at the bottom of the movable seat, and when the screw rod rotationally drives the base sliding block to move, the slope surface pushes the movable seat to rotate around the first rotary shaft.
9. The three-sided automatic indexing polishing device of a minimally invasive infusion needle of claim 4, wherein the auxiliary clamping seat comprises an upper clamping plate and a lower clamping plate matched with the upper clamping plate, the lower end of the lower clamping plate is connected with a jacking cylinder, and the lower clamping plate is provided with a needle clamping groove for accommodating the minimally invasive infusion needle.
10. The three-sided automatic indexing polishing device of the minimally invasive infusion needle of claim 9, wherein the auxiliary clamping seat is provided with a needle avoiding groove for the needle clamping mechanism to carry the minimally invasive infusion needle into, and the side of the upper clamping plate, which is far away from the center of the rotating disc, is provided with a stepping groove for bringing a polishing wheel into contact with the minimally invasive infusion needle conveniently.

Description

Three-face automatic indexing polishing device for minimally invasive infusion needle Technical Field The invention belongs to the technical field of medical instrument processing equipment, and particularly relates to a three-face automatic indexing and polishing device for a minimally invasive infusion needle. Background Conventional straight bore infusion needles (beveled needles) are typically manufactured by cutting a bevel at one end of a stainless steel tube and grinding a cutting edge around the bevel, the penetration mechanism being the cutting of the bevel of the tip of the needle with the tissue of the human body. However, during the puncturing process, skin or vessel wall tissue opposite the needle hole is cut off, forming tiny tissue fragments. The tissue scraps not only easily cause the blockage of the needle tube, but also can enter the human body along with the liquid medicine to cause pathogen infection or become insoluble vascular waste, so that the hidden danger of thrombus formation exists, and the life of a patient can be endangered when serious. Aiming at the fundamental defects, the industry proposes an innovative design of a minimally invasive infusion needle. The needle point is a closed cone shape, and the liquid medicine through hole is arranged on three edges adjacent to the needle point, commonly called as a triangular needle. When the needle body is penetrated, the tissue is flexibly spread by the triangular prism-shaped needle body instead of being cut off, so that the infusion without falling scraps is realized, and the clinical risk of the traditional straight hole needle is solved in principle. The three facets of the triangular needle require extremely high geometric accuracy and surface quality to ensure its penetration performance. In the prior art, the patent of the invention with the grant bulletin number of CN118636024B, CN118513618B discloses a three-edged needle electric discharge machining device and a rotary indexing device thereof, which can realize the processes of needle feeding, automatic indexing rotation, polishing, punching, needle feeding and the like of a needle body. However, the rotation indexing adopts a mode that the sector gear and the indexing gear are meshed in the rotation process, and the mechanism can realize automatic indexing, but has precise and complex structure and high requirements on manufacturing and assembling precision, so that the equipment cost is higher and the maintenance is inconvenient. In addition, the processing device adopts a design idea of multi-needle parallel processing, and each group of needle clamping mechanism comprises a plurality of needle clamping units and is mainly suitable for mass production. When the single needle body needs to be subjected to polishing process debugging, sample trial production or small-batch processing, the whole set of complex equipment is not economical and inconvenient to start, and polishing parameters are difficult to quickly adjust. Therefore, a need exists to provide a minimally invasive infusion needle three-face automatic indexing polishing device with a simplified structure, controllable cost and convenient operation, which can finish high-precision polishing of a single needle body and meet the flexible requirements of scenes such as research and development verification, process debugging, small-batch customization and the like. Disclosure of Invention Aiming at the defects in the background technology, the invention provides the three-face automatic indexing polishing device for the minimally invasive infusion needle, the structure of the indexing mechanism is simplified compared with the prior equipment, the manufacturing cost is low, the maintenance is convenient, the high-precision polishing of a single needle body can be completed, and the flexible requirements of scenes such as research and development verification, process debugging, small-batch customization and the like are met. In order to achieve the above purpose, the technical solution of the present invention is as follows: The utility model provides a three-sided automatic graduation grinding device of wicresoft's injection needle, includes fixing base, rotary disk, rotary motor and three grinding machanism, the upper end of fixing base is equipped with the boss, the rotary disk rotates to be connected in the top of boss and by rotary motor drive, the edge of rotary disk is equipped with the needle mechanism that presss from both sides of at least one radial setting, it includes needle holder and needle clamping assembly to press from both sides needle mechanism, the needle holder is connected to the needle clamping assembly, needle clamping assembly includes the needle clamping shaft that is connected with needle holder rotation to and the coaxial division dog that is fixed in needle clamping shaft one end, the other end of needle clamping shaft is equipped with the clamping part that is used for centre gripping wi