CN109702481B

CN109702481B - Upper protective cap equipment of automatic injection needle assembly system

Info

Publication number: CN109702481B
Application number: CN201910089210.5A
Authority: CN
Inventors: 陆军; 陆维炜; 赵丽杰; 倪琳
Original assignee: Caina Technology Co ltd
Current assignee: Caina Technology Co ltd
Priority date: 2019-01-30
Filing date: 2019-01-30
Publication date: 2024-04-16
Anticipated expiration: 2039-01-30
Also published as: CN109702481A

Abstract

The invention discloses an upper protective cap device of an automatic injection needle assembly system, which comprises a third rotary table rotationally connected with a table top of an automatic injection needle assembly machine, wherein a plurality of groups of arranged protective sleeve needle through hole groups are fixedly arranged on the third rotary table in an annular array manner, each group of protective sleeve needle through hole groups comprises a plurality of protective sleeve needle through holes, the protective sleeve needle through holes are arranged close to the edge of the third rotary table, the aperture of each protective sleeve needle through hole is smaller than the maximum outer diameter of a protective sleeve and can be inserted into the protective sleeve, and a protective sleeve needle receiving mechanism, an empty detection mechanism, an upper protective cap mechanism, a protective cap pressing mechanism and a finished product clamping mechanism are sequentially arranged on the table top of the automatic injection needle assembly machine outside the protective sleeve needle through holes along the rotation direction of the third rotary table. The invention adopts the turntable type to reduce the rejection rate and has high efficiency, and can ensure the accuracy of the falling position of the injection needle after turning, thereby realizing the problem that the protective cap cannot be automatically pressed in the past, breaking the technical barriers in the field and even realizing the automatic scalding of the protective cap.

Description

Upper protective cap equipment of automatic injection needle assembly system

Technical Field

The invention relates to an upper protective cap device of an automatic injection needle assembly system.

Background

The existing inlaid injection needle or aluminum seat injection needle is generally assembled manually, the efficiency is low, the needle tube is easy to stab people, although automatic assembly equipment is occasionally adopted, automatic assembly of the protective cap cannot be realized, and some equipment adopts a chain type, and after the needle seat is arranged on the needle seat to a needle seat limiting die on the chain, the needle seat is easy to fall off due to the fact that the chain is easy to circularly convey, so that the rejection rate is increased; in addition, the existing equipment has few stations (namely the number of needle seats, jackets and jackets to be pressed at one time) and has low efficiency, and has no misoperation, the existing assembly machine can not realize the function of automatically ironing protective caps, and the existing automatic assembly machine is manual needle detection, so that the degree of automation is not high enough.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, and provides upper protective cap equipment of an automatic injection needle assembly system, so that the problem that a protective cap cannot be automatically pressed in the past is solved, the technical barriers in the field are broken, and even the automatic protective cap pressing can be realized.

In order to achieve the above purpose, the technical scheme of the invention is to design an upper protective cap device of an automatic injection needle assembling system, which comprises a third rotary table rotationally connected with a table top of the automatic injection needle assembling machine, wherein a plurality of groups of arranged protective sleeve needle through hole groups are fixedly arranged on the third rotary table in an annular array manner, each group of protective sleeve needle through hole group comprises a plurality of protective sleeve needle through holes, the protective sleeve needle through holes are arranged close to the edge of the third rotary table, the aperture of each protective sleeve needle through hole is smaller than the maximum outer diameter of a protective sleeve and can be inserted into the protective sleeve, and a protective sleeve needle mechanism, an empty detecting mechanism, an upper protective cap mechanism, a protective cap pressing mechanism and a finished product clamping mechanism are sequentially arranged on the table top of the automatic injection needle assembling machine, outside the third rotary table top of the protective sleeve needle through holes along the rotation direction of the third rotary table.

The further technical scheme is that the sheath needle receiving mechanism comprises a sheath needle receiving through hole which is rotated to a sheath needle receiving mechanism station and a limiting cylinder which is fixed on the table top of the automatic injection needle assembling machine, the end part of a piston rod of the limiting cylinder is fixedly connected with an injection needle falling limiting rod, the position of the limiting rod is matched with a pressing plate of the transferring body turning mechanism, and the sheath needle receiving through hole which is rotated to the sheath needle receiving mechanism station corresponds to the position of a needle seat which is vertically downwards pressed with a sheath on a rotating seat of the transferring body turning mechanism.

The empty detection mechanism comprises a support column fixed on the table top of the automatic injection needle assembling machine, four or six photoelectric sensors are fixedly arranged on the support column, and the photoelectric sensors are right opposite to the sheath needle connecting through holes which are arranged on the third turntable and rotate to the positions of the empty detection mechanism.

The upper cap mechanism comprises an upper cap mechanism base fixed on the table top of the automatic injection needle assembling machine, the upper cap mechanism base is in a frame form, a cap rail is arranged on the upper cap mechanism base, the cap rail is obliquely arranged with a horizontal line, the lower end of the cap rail is positioned at one side of a cap needle through hole of the position of the upper cap mechanism, which is rotated on a third turntable, the cap rail is provided with a chute matched with the small end of the cap, the higher end of the cap rail is connected with the lower end of a screw cap conveying rail of the cap feeding mechanism, the higher end of the screw cap conveying rail is connected with an angle steel-shaped screw slide rail, the screw slide rail is inclined towards the rotation axis of the screw slide rail, the lower end of the screw slide rail is connected with the higher end of the screw cap conveying rail, the higher end of the screw slide rail is connected with a cap feeding hopper, and the lower surface of the cap feeding hopper is fixedly provided with a vibrating motor; one side of the lower end of the protective cap track, which is close to the third turntable, is provided with a dislocation blocking plate, a semicircular hole for receiving the protective cap is arranged on the dislocation blocking plate, the side surface of the dislocation blocking plate is fixedly connected with a piston rod of a dislocation cylinder, and the dislocation cylinder is fixedly arranged on the table top of the automatic injection needle assembling machine; the upper protective cap mechanism further comprises a seventh transverse driving air cylinder fixed on the table top of the automatic injection needle assembling machine, a piston rod of the seventh transverse driving air cylinder is fixedly connected with a seventh sliding plate, the seventh sliding plate is horizontally and slidably arranged on a seventh fixing plate, the seventh fixing plate is vertically fixed on the table top of the automatic injection needle assembling machine, the seventh vertical driving air cylinder is fixedly arranged on the seventh sliding plate, a seventh driven plate is vertically and slidably arranged on the seventh sliding plate, the piston rod of the seventh vertical driving air cylinder is fixedly connected with the seventh driven plate, four or six protective cap clamping air cylinders are fixedly arranged on the seventh driven plate, the protective cap clamping air cylinder is arranged below the protective cap clamping air cylinder in a driving mode to clamp the protective cap to the bottom of the turned needle seat, and two limiting positions of the horizontal sliding of the seventh sliding plate are respectively right against a protective cap receiving needle through hole on a third rotary table positioned at the station of the upper protective cap mechanism and right against a misplacement blocking plate which is misplaced after being driven by the misplacement air cylinder.

The further technical scheme is that the cap pressing mechanism comprises a cap pressing mechanism base fixed on the table top of the automatic injection needle assembling machine, a cap pressing cylinder is fixedly arranged on the cap pressing mechanism base, four or six pressure heads are fixedly arranged on a piston rod of the cap pressing cylinder, and the pressure heads are right opposite to a sleeve needle connecting through hole of the station, which is rotated on the third turntable.

The further technical scheme is that the protective cap pressing mechanism further comprises a protective cap scalding block, wherein the protective cap scalding block is connected with a piston rod of a cylinder which is horizontally arranged, and the scalding block is connected with the resistance wire type heater.

The further technical proposal is that the finished product clamping mechanism comprises an eighth transverse driving air cylinder fixed on the table top of the automatic injection needle assembling machine, a piston rod of the eighth transverse driving air cylinder is fixedly connected with an eighth sliding plate, the eighth sliding plate is horizontally and slidingly arranged on an eighth fixed plate, the eighth fixed plate is vertically fixed on the table top of the automatic injection needle assembling machine, the eighth sliding plate is fixedly provided with an eighth vertical driving air cylinder, the eighth sliding plate is vertically and slidably provided with an eighth driven plate, a piston rod of the eighth vertical driving cylinder is fixedly connected with the eighth driven plate, four or six finished product clamping cylinders are fixedly arranged on the eighth driven plate, the finished product clamping cylinders drive clamping and grabbing actions arranged below the finished product clamping cylinders to clamp finished product injection needles, and a finished product collecting bucket is arranged at the position of the finished product clamping mechanism and outside the third turntable.

The invention has the advantages and beneficial effects that: utilize vibration and dead weight cooperation spiral slide rail, spiral helmet delivery track can realize that the helmet is automatic to drop to the helmet track, dislocation baffle plate and dislocation cylinder's setting can be with the helmet dislocation that is in helmet track low end outmost to move to a distance (and because dislocation baffle plate is leaning on helmet track low end) that leaves the helmet track a section of level slightly, then cooperate the helmet to press from both sides the action of cylinder and can realize very accurately placing the helmet on the needle file (i.e. needle file back) after having turned one's body (because in case the helmet placement position slightly deviates slightly, the helmet is very easily broken by the pressure when the follow-up pressure helmet for the disability rate rises greatly), press the helmet cylinder and even press twice at the in-process of pressure helmet, the first pre-compaction, the second repress, both guarantee the pressure of helmet and also avoid the easy appearance helmet of once pressing to be pressed bad condition. The setting of the hot stamping block enables the assembly machine to also realize automatic stamping of the protective cap (one small stamping block, one stamping point enables the protective cap to be connected with the needle seat through melting). The upper protective cap adopts a clamping and grabbing mode to ensure the accuracy of the position of the upper protective cap (the upper protective cap is required to be accurate, otherwise, the rear protective cap is easy to crush, and the upper needle seat, the upper needle and the upper protective sleeve are provided with guide < such as the guide of the upper needle seat with a needle seat limiting die, the guide of the upper needle with a needle seat bell mouth and the guide of the upper protective sleeve with a needle >, so that the clamping and grabbing mode is not required to be adopted to lift the upper needle seat, the upper needle and the upper protective sleeve), the spiral slide rail in the upper protective cap mechanism inclines towards the rotation axis of the upper protective cap mechanism, namely the outer edge of the bottom plate of the angle steel slide rail is higher than the inner edge of the bottom plate, namely the corner of the angle steel, so that the protective cap which is vibrated and slipped from the upper protective cap hopper is ensured to be propped against the spiral slide rail.

Drawings

FIG. 1 is an exploded perspective view of an automatic needle assembly machine according to the present invention;

FIG. 2 is an enlarged schematic view of the pick holder needle cylinder portion of FIG. 1;

FIG. 3 is an enlarged schematic view of the cap clip cylinder portion of FIG. 1;

fig. 4 is an enlarged schematic view of the hub block portion of fig. 1;

FIG. 5 is an enlarged schematic view of the vicinity of the thimble slot portion of FIG. 1;

FIG. 6 is an enlarged schematic view of the vicinity of the push pin cylinder portion of FIG. 1;

FIG. 7 is an enlarged schematic view of the vicinity of the pick holder needle cylinder portion of FIG. 1;

FIG. 8 is an enlarged schematic view of the vicinity of the cylinder portion of the rivet pin of FIG. 1;

FIG. 9 is an enlarged schematic view of the vicinity of the second laterally driven cylinder portion of FIG. 1;

FIG. 10 is a top view of FIG. 1;

FIG. 11 is an enlarged schematic view of the transfer needle cylinder section of FIG. 10;

FIG. 12 is an enlarged schematic view of the vicinity of the swivel seat portion of FIG. 10;

FIG. 13 is an enlarged schematic view of the vicinity of the photosensor section of FIG. 10;

FIG. 14 is a schematic view of a portion of a helmet track in accordance with the present invention;

FIG. 15 is a schematic view of the spiral shield transport track of FIG. 14;

FIG. 16 is a schematic view of the spiral slide track of FIG. 14;

FIG. 17 is an enlarged schematic view of the vicinity of the guard rail portion of FIG. 10;

FIG. 18 is a schematic view of the engagement of a helmet rail with a misalignment stop of the present invention;

FIG. 19 is a schematic view of the dislocated state of FIG. 18;

FIG. 20 is a schematic view of a cap clip cylinder portion of the present invention;

FIG. 21 is a schematic view of the pressure cap cylinder of FIG. 10;

FIG. 22 is a schematic view of a cap cylinder;

fig. 23 is a schematic view of the upper hub channel rail of fig. 10;

fig. 24 is a schematic view of the hopper on the needle mount of the present invention;

FIG. 25 is a schematic view of the swivel mount of FIG. 10;

FIG. 26 is a bottom view of the swivel mount of FIG. 25;

FIG. 27 is a schematic illustration of an upper jacket channel rail of the present invention;

FIG. 28 is a schematic view of a stop lever portion of the present invention;

fig. 29 is a front view of fig. 1;

FIG. 30 is a left side view of FIG. 29 rotated 90 clockwise;

FIG. 31 is a right side view of FIG. 29 rotated 90 clockwise;

fig. 32 is an enlarged schematic view of the hub block of fig. 30;

FIG. 33 is a schematic view of the spike of FIG. 29;

FIG. 34 is a schematic view of the movable portion of FIG. 10;

FIG. 35 is a schematic view of the through hole of the needle of FIG. 10;

fig. 36 is a schematic view of the pressure jacket cylinder of fig. 10.

In the figure: 1. an automatic injection needle assembling machine table top; 2. a first turntable; 3. needle seat limit mould; 4. an upper needle seat mechanism; 5. a needle feeding mechanism; 6. a first needle detection mechanism; 7. a base picking mechanism; 8. a riveting needle mechanism; 9. an image detection mechanism; 10. a transfer mechanism; 11. a waste rejecting mechanism; 12. a second turntable; 13. a needle receiving seat mechanism; 14. a second needle detecting mechanism; 15. a jacket feeding mechanism; 16. a jacket pressing mechanism; 17. a rejecting mechanism; 18. a transfer turning mechanism; 19. a silicone oil feeding mechanism; 20. a third turntable; 21. a sheath needle through hole is connected; 22. a sheath needle connecting mechanism; 23. an empty detection mechanism; 24. an upper protective cap mechanism; 25. the cap pressing mechanism; 26. a finished product clamping mechanism; 27. a base of the upper protective cap mechanism; 28. a protective cap track; 29. a spiral cap conveying track; 30. a spiral slide rail; 31. a protective cap feeding hopper; 32. a vibration motor; 33. a staggered baffle plate; 34. a seventh lateral driving cylinder; 35. a seventh sliding plate; 36. a seventh fixing plate; 37. a seventh vertical driving cylinder; 38. a seventh driven plate; 39. the protective cap clamps the cylinder; 40. clamping and grabbing; 41. a protective cap pressing cylinder; 42. a protective cap scalding block; 43. a heater; 44. a riveting needle cylinder; 45. a base of the upper needle seat mechanism; 46. a needle seat track; 47. an upper needle seat groove rail; 48. a spring post; 49. a needle seat connecting block; 50. a fourth rotating shaft; 51. a rack; 52. feeding a needle seat into a hopper; 53. a thumb wheel; 54. a needle feeding mechanism base; 55. a thimble groove; 56. a thimble portion; 57. a first plate; 58. a second plate; 59. a third plate; 60. a sloping plate; 61. a push-pin cylinder; 62. a movable part; 63. a push needle frame; 64. a roller; 65. an extension plate; 66. a support column; 67. a metal sensor; 68. a first lateral drive cylinder; 69. a first sliding plate; 70. a first fixing plate; 71. a first vertical driving cylinder; 72. a first driven plate; 73. a needle picking cylinder; 74. a picking seat recycling hopper; 75. a black-and-white camera; 76. a servo drive motor; 77. a second transverse driving cylinder; 78. a transferring needle clamping cylinder; 79. a rotating seat; 80. a pressing plate; 81. a silicon oil tank; 82. a waste rejecting needle clamping cylinder; 83. a needle connecting and clamping cylinder; 84. a base of an upper sheath mechanism; 85. a sheath track; 86. a jacket groove rail is arranged on the upper part; 87. a second rotating shaft; 88. feeding a sheath into a hopper; 89. a shuttle plate; 90. a jacket pressing cylinder; 91. removing a needle clamping cylinder; 92. a transferring and turning needle clamping cylinder; 93. a limit rod; 94. a photoelectric sensor; 95. and clamping the finished product into a cylinder.

Detailed Description

The following describes the embodiments of the present invention further with reference to the drawings and examples. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.

As shown in fig. 1 to 36 (for convenience of illustration, fig. 15 shows a spiral cap conveying track with only one line and does not show notches and protrusions on a spiral slide rail), the present invention is an automatic needle assembling machine and a process for assembling a needle using the same, including a needle feeding device, a sheath feeding device, and a cap feeding device; the needle feeding device comprises a first rotary table 2 which is rotationally connected with an automatic injection needle assembling machine table 1, a plurality of arranged needle seat limiting dies 3 are fixedly arranged on the first rotary table 2 in an annular array, the needle seat limiting dies 3 are matched with the inner wall of the needle seat and are arranged close to the edge of the first rotary table 2, an upper needle seat mechanism 4, an upper needle mechanism 5, a first needle detecting mechanism 6, a needle picking mechanism 7, a needle riveting mechanism 8, an image detecting mechanism 9, a transferring mechanism 10 and a waste picking mechanism 11 are sequentially arranged on the automatic injection needle assembling machine table 1 along the rotation direction of the first rotary table 2, the driven parts of the needle riveting members are fixedly connected to the automatic injection needle assembling machine table 1, the driven parts of the needle riveting members are opposite to containing holes arranged on the needle tube part of the needle seat limiting dies 3, and the aperture of the containing holes is larger than the outer diameter of the needle tube and smaller than the outer diameter of the upper end of the needle tube; the upper sheath equipment comprises a second rotary table 12 which is rotationally connected with the needle automatic assembly machine table top 1, a plurality of arranged needle seat limiting dies 3 are fixedly arranged on the second rotary table 12 in an annular array, the needle seat limiting dies 3 are matched with the shape of the inner wall of the needle seat and are arranged close to the edge of the second rotary table 12, a needle receiving seat mechanism 13, a second needle detecting mechanism 14, an upper sheath mechanism 15, a sheath pressing mechanism 16, a rejecting mechanism 17 and a transferring and turning mechanism 18 are sequentially arranged on the needle automatic assembly machine table top 1 and outside the second rotary table 12 of the needle seat limiting dies 3 along the rotation direction of the second rotary table 12; a silicone oil feeding mechanism 19 is arranged on the connecting line of the first rotary table 2 and the second rotary table 12 and between the transfer mechanism 10 and the needle receiving seat mechanism 13; the upper protective cap equipment comprises a third rotary table 20 which is rotationally connected with the injection needle automatic assembly machine table top 1, a plurality of groups of protective sleeve needle through hole groups are fixedly arranged on the third rotary table 20 in an annular array mode, each group of protective sleeve needle through hole groups comprises a plurality of protective sleeve needle through holes 21, the protective sleeve needle through holes 21 are arranged close to the edge of the third rotary table 20, the aperture of each protective sleeve needle through hole 21 is smaller than the maximum outer diameter of a protective sleeve and can be inserted into the protective sleeve, and a protective sleeve needle mechanism 22, an empty detection mechanism 23, an upper protective cap mechanism 24, a protective cap pressing mechanism 25 and a finished product clamping mechanism 26 are sequentially arranged on the injection needle automatic assembly machine table top 1, located on the outer side of the third rotary table 20 of the protective sleeve needle through holes 21, along the rotation direction of the third rotary table 20. The upper cap mechanism 24 comprises an upper cap mechanism base 27 fixed on the table top 1 of the automatic injection needle assembling machine, the upper cap mechanism base 27 is in a frame form, a cap rail 28 is arranged on the upper cap mechanism base 27, the cap rail 28 is obliquely arranged with a horizontal line, the lower end of the cap rail 28 is positioned on the third turntable 20 and rotates to one side of a sleeve needle through hole 21 at the position of the upper cap mechanism 24, a chute matched with the small end of the cap is arranged on the cap rail 28, the upper end of the cap rail 28 at the higher end is connected with a screw cap conveying rail 29 of the cap feeding mechanism (as shown in fig. 15, the screw cap conveying rail 29 is formed by four bent metal column bars, so that the cap can slide downwards along the screw cap conveying rail 29), the lower end of the screw cap conveying rail 29 is connected with an angle steel screw slide rail 30, the lower end of the screw slide rail 30 is obliquely arranged towards the rotating axis, the lower end of the screw slide rail 30 is connected with a screw cap conveying rail 29, the upper end of the screw hopper 31 is connected with the upper end of the screw hopper 31, and the upper end of the screw slide rail 31 is arranged on the upper surface of the screw hopper 32; one side, which is positioned at the lower end of the helmet rail 28 in the height and is close to the third turntable 20, of the helmet rail is provided with a dislocation blocking plate 33, a semicircular hole for receiving a helmet is formed in the dislocation blocking plate 33, the side surface of the dislocation blocking plate 33 is fixedly connected with a piston rod of a dislocation cylinder, and the dislocation cylinder is fixedly arranged on the table top 1 of the automatic injection needle assembling machine; the upper cap protection mechanism 24 further comprises a seventh transverse driving air cylinder 34 fixed on the automatic injection needle assembly machine table top 1, a piston rod of the seventh transverse driving air cylinder 34 is fixedly connected with a seventh sliding plate 35, the seventh sliding plate 35 is horizontally and slidably arranged on a seventh fixed plate 36, the seventh fixed plate 36 is vertically fixed on the automatic injection needle assembly machine table top 1, a seventh vertical driving air cylinder 37 is fixedly arranged on the seventh sliding plate 35, a seventh driven plate 38 is vertically and slidably arranged on the seventh sliding plate 35, a piston rod of the seventh vertical driving air cylinder 37 is fixedly connected with the seventh driven plate 38, six cap clamping air cylinders 39 are fixedly arranged on the seventh driven plate 38, the cap clamping air cylinders 39 drive clamping claws 40 arranged below the cap clamping air cylinders to clamp the caps to the bottoms of the turned needle seats, and two limit positions of the horizontal sliding of the seventh sliding plate 35 are respectively right opposite to the through holes 21 of the protective sleeve needles on the third turntable 20 positioned at the upper cap protection mechanism 24 and right opposite to the misplacement stop 33 which happens after misplacement driving; the needle falling rail cap pressing mechanism 25 comprises a cap pressing mechanism 25 base fixed on the table top 1 of the automatic injection needle assembling machine, a cap pressing cylinder 41 is fixedly arranged on the cap pressing mechanism 25 base, six pressure heads are fixedly arranged on a piston rod of the cap pressing cylinder 41, and the pressure heads are opposite to the sleeve needle connecting through holes 21 which rotate to the station on the third rotary table 20; the needle falling rail pressure cap protection mechanism 25 further comprises a cap scalding block 42, wherein the cap scalding block 42 is connected with a piston rod of a horizontally arranged cylinder, and the scalding block is connected with a resistance wire heater 43. The riveting components are six riveting needle cylinders 44, the needle falling rail driving part is a cylinder body of the riveting needle cylinders 44, the needle falling rail driven part comprises a piston rod of the riveting needle cylinders 44 and a pressing block fixedly connected to the piston rod, the riveting needle cylinders 44 are positioned above the needle tube on the needle seat limiting die 3, and the needle falling rail accommodating holes are formed in the lower surface of the pressing block; a third servo motor and a third speed reducer connected with the third servo motor are arranged on the table top 1 of the automatic injection needle assembling machine, and an output shaft of the third speed reducer is fixedly connected with the center of the lower surface of the first rotating disc 2; the upper needle seat mechanism 4 comprises an upper needle seat mechanism base 45 fixed on the table top 1 of the automatic injection needle assembling machine, the upper needle seat mechanism base 45 is in a frame form, a needle seat track 46 is arranged on the upper needle seat mechanism base 45, the needle seat track 46 is positioned above the needle seat limiting die 3, the needle seat track 46 is formed by matching a fixed track block and a sliding track block, and the sliding track block is arranged on the upper needle seat mechanism base 45 in a sliding manner through a cylinder; an upper needle seat groove rail 47 which is obliquely arranged with the horizontal plane is fixedly arranged above the upper needle seat mechanism base 45, a vibrating motor 32 is fixedly arranged on the lower surface of the upper needle seat groove rail 47, the upper needle seat groove rail 47 is higher than the needle seat rail 46 in height, a spring column 48 which is connected with an air source and used for limiting a needle seat is arranged at the discharge hole of the upper needle seat groove rail 47, a needle seat connecting block 49 is arranged at one side of the discharge hole of the upper needle seat groove rail 47, the needle seat connecting block 49 is cuboid and vertically arranged, a needle seat connecting hole which is partially matched with the lower end of the needle seat is arranged at the upper end of the needle seat connecting block 49, a fourth rotating shaft 50 is fixedly arranged at the lower end of the needle seat connecting block 49, a gear is fixedly arranged at the side surface of the fourth rotating shaft 50 which exceeds the needle seat connecting block 49 and is meshed with the gear, and a rack 51 is arranged on the upper needle seat mechanism base 45 in a sliding manner and is driven by an air cylinder fixedly arranged on the upper needle seat mechanism base 45; a needle seat upper hopper 52 is arranged at the feed inlet of the upper needle seat groove rail 47, the needle seat upper hopper 52 is fixed on the upper needle seat mechanism base 45, the lower opening of the needle seat upper hopper 52 is rectangular and is matched with the shape of the upper needle seat groove rail 47, a shifting wheel 53 is rotationally arranged in the needle seat upper hopper 52, and the shortest distance between the impeller edge of the shifting wheel 53 and the upper needle seat groove rail 47 is smaller than the outer diameter of the small end of the needle seat; a driving motor of the shifting wheel 53 and a fourth speed reducer connected with the driving motor of the shifting wheel 53 are fixedly arranged on the upper needle seat mechanism base 45, and an output shaft of the fourth speed reducer is fixedly connected with a wheel shaft of the shifting wheel 53; the needle feeding mechanism 5 comprises a needle feeding mechanism base 54 fixed on the table top 1 of the automatic injection needle assembling machine, the needle feeding mechanism base 54 is in a frame form, an upper needle box is fixedly arranged on the needle feeding mechanism base 54, the upper needle box comprises a lower part of a frame type, a thimble part 56 is arranged in the lower part, six thimble grooves 55 are arranged on the thimble part 56, an upper plate of the lower part of the frame type is provided with an opening matched with the thimble part 56, and the thimble part 56 is driven by an air cylinder to move up and down; the upper needle box further comprises a plate upper portion, the upper portion comprises three vertical plates and two inclined plates 60 inclined with the horizontal line, the three vertical plates are respectively a first plate 57, a second plate 58 and a third plate 59, the first plate 57 is perpendicular to the thimble grooves 55, the second plate 58 and the third plate 59 are parallel to the thimble grooves 55, the second plate 58 and the third plate 59 are consistent in shape and size, the first plate 57 is gradually inclined from bottom to top in the direction of the first rotating disc 2, one end of the upper plate of the lower portion, close to the first rotating disc 2, is lower than one end of the upper plate, far away from the first rotating disc 2, of the upper plate, the two inclined plates 60 are located at the left end and the right end of the first plate 57, the second plate 58 and the third plate 59 are fixed on the first plate 57, the second plate 58 and the third plate 59 are located above the thimble grooves 55 and on two sides of the thimble grooves 55, the lower ends of the second plate 58 and the third plate 59 are right opposite to the lowest end of the inclined plates 60, and the lower ends of the second plate 58 and the third plate 59 are spaced from the upper plate of the lower portion. The needle feeding mechanism 5 further comprises a rail closing cylinder and a needle pushing cylinder 61 which are sequentially and fixedly arranged on the table top 1 of the automatic injection needle assembling machine from bottom to top, wherein the rail closing cylinder and the needle pushing cylinder 61 are arranged close to the first rotary table 2 and are positioned between the first rotary table 2 and the needle feeding box, a fixing part of a needle falling rail is fixedly arranged on the side surface of the first plate 57, which is close to the first rotary table 2, the end part of a piston rod of the rail closing cylinder is fixedly connected with a movable part 62 of the needle falling rail serving as the other half of the needle falling rail, the end part of the piston rod of the needle pushing cylinder 61 is fixedly connected with a needle pushing frame 63, two ends of the needle pushing frame 63 are provided with rolling wheels 64 in a rolling way, annular grooves are formed in the rolling wheels 64, the groove widths of the annular grooves are matched with the thickness of the second plate 58, the second plate 58 and the third plate 59 are arranged beyond the first plate 57, and extension plates 65 which are integrally arranged with the second plate 58 and the third plate 59 are respectively arranged on the second plate 58 and the third plate 59 towards the first rotary table 2; the first needle detecting mechanism 6 comprises a support column 66 fixed on the table top 1 of the automatic injection needle assembling machine, and six metal sensors 67 are fixedly arranged on the support column 66; the picking mechanism 7 comprises a first transverse driving air cylinder 68 fixed on the table top 1 of the automatic injection needle assembling machine, a piston rod of the first transverse driving air cylinder 68 is fixedly connected with a first sliding plate 69, the first sliding plate 69 is horizontally and slidably arranged on a first fixing plate 70, the first fixing plate 70 is vertically fixed on the table top 1 of the automatic injection needle assembling machine, a first vertical driving air cylinder 71 is fixedly arranged on the first sliding plate 69, a first driven plate 72 is vertically and slidably arranged on the first sliding plate 69, a piston rod of the first vertical driving air cylinder 71 is fixedly connected with the first driven plate 72, six picking seat needle clamping air cylinders 73 are fixedly arranged on the first driven plate 72, the picking seat needle clamping air cylinders 73 drive the clamping grippers 40 arranged below the first sliding plate to move so as to clamp the injection needles, and a picking seat recovery bucket 74 is arranged at the position of the picking mechanism 7 and outside the first rotating disc 2. The upper edge of the extension plate 65 is flush with the upper edges of the second plate 58 and the third plate 59 and is at the same height, the push-pin frame 63 is fixedly connected with a push-pin sponge, the lower end of the push-pin sponge abuts against the upper edges of the second plate 58 and the third plate 59 and/or the upper edge of the extension plate 65, and the limit position of the vertical upward movement of the thimble portion 56 is that the upper end of the groove side wall of the thimble groove 55 is flush with the upper edge of the extension plate 65. The image detection mechanism 9 comprises a servo driving motor 76 fixed on the support, the servo driving motor 76 drives the black-and-white camera 75 to translate, and the black-and-white camera 75 is arranged on the support in a sliding manner; the transfer mechanism 10 comprises a second transverse driving air cylinder 77 fixed on the table top 1 of the automatic injection needle assembling machine, a piston rod of the second transverse driving air cylinder 77 is fixedly connected with a second sliding plate, the second sliding plate is horizontally and slidably arranged on a second fixed plate, the second fixed plate is vertically fixed on the table top 1 of the automatic injection needle assembling machine, a second vertical driving air cylinder is fixedly arranged on the second sliding plate, a second driven plate is vertically and slidably arranged on the second sliding plate, a piston rod of the second vertical driving air cylinder is fixedly connected with the second driven plate, six transfer needle clamping air cylinders 78 are fixedly arranged on the second driven plate, and the transfer needle clamping air cylinders 78 drive a clamping gripper 40 arranged below the transfer needle clamping air cylinders to act so as to clamp the injection needles; the waste removing mechanism 11 comprises a third transverse driving air cylinder fixed on the table top 1 of the automatic injection needle assembling machine, a piston rod of the third transverse driving air cylinder is fixedly connected with a third sliding plate, the third sliding plate is horizontally arranged on a third fixed plate in a sliding mode, the third fixed plate is vertically fixed on the table top 1 of the automatic injection needle assembling machine, a third vertical driving air cylinder is fixedly arranged on the third sliding plate, a third driven plate is vertically arranged on the third sliding plate in a sliding mode, a piston rod of the third vertical driving air cylinder is fixedly connected with the third driven plate, six waste removing needle clamping air cylinders 82 are fixedly arranged on the third driven plate, the waste removing needle clamping air cylinders 82 drive clamping grippers 40 arranged below the waste removing air cylinders to act so as to clamp injection needles with burrs, and waste removing recovery hoppers are arranged on the outer sides of the first rotating disc 2 and positioned at the waste removing mechanism 11; the silicone oil mechanism 19 on the needle falling rail comprises a support column fixed with the table top 1 of the automatic injection needle assembling machine, a first rotating shaft is rotatably arranged on the support column, a first servo motor and a first speed reducer are fixedly arranged on the table top 1 of the automatic injection needle assembling machine, the first servo motor is connected with the first speed reducer, and an output shaft of the first speed reducer is fixedly connected with the first rotating shaft; the first rotating shaft is fixedly provided with a cuboid-shaped rotating seat 79, each of four side faces of the rotating seat 79 is provided with a needle seat limiting die 3, one side of the side face, which is positioned on the needle seat limiting die 3, is provided with a pressing plate 80 in a sliding mode, the pressing plate 80 is driven by an air cylinder to press a needle seat which is positioned in the horizontal direction or vertically downward after rotating, a silicon oil groove 81 is arranged under the first rotating shaft, and the silicon oil groove 81 is vertically arranged in a sliding mode and is driven by the air cylinder fixed on the table board 1 of the automatic injection needle assembling machine. The needle receiving seat mechanism 13 comprises a needle receiving seat limit die 3 which rotates to a station of the needle receiving seat mechanism 13 and a fourth sliding plate which is fixedly connected with the second sliding plate, wherein the fourth sliding plate is parallel to the second sliding plate, a fourth vertical driving air cylinder is fixedly arranged on the fourth sliding plate, a fourth driven plate is vertically arranged on the fourth sliding plate in a sliding manner, a piston rod of the fourth vertical driving air cylinder is fixedly connected with the fourth driven plate, six needle receiving needle clamping air cylinders 83 are fixedly arranged on the fourth driven plate, and the needle receiving needle clamping air cylinders 83 drive a clamping gripper 40 arranged below the needle receiving needle clamping air cylinders to act so as to clamp an injection needle after the injection needle is completely filled in the injection needle receiving seat limit die 3 at the station of the needle receiving seat mechanism 13; the two limit positions of the second sliding plate which horizontally slide are respectively opposite to the upper silicone oil mechanism 19 and opposite to the needle seat limit mould 3 on the first rotary table 2 positioned at the station of the transfer mechanism 10, and the two limit positions of the fourth sliding plate which horizontally slide are respectively opposite to the upper silicone oil mechanism 19 and opposite to the needle seat limit mould 3 on the second rotary table 12 positioned at the needle seat receiving mechanism 13; the needle falling rail second needle detecting mechanism 14 comprises a support column 66 fixed on the table top 1 of the automatic injection needle assembling machine, and six metal sensors 67 are fixedly arranged on the support column 66. The upper sheath mechanism 15 comprises an upper sheath mechanism base 84 fixed on the table top 1 of the automatic injection needle assembling machine, the upper sheath mechanism base 84 is in a frame form, a sheath rail 85 is arranged on the upper sheath mechanism base 84, the sheath rail 85 is positioned above the needle seat limiting die 3, the sheath rail 85 is formed by matching a fixed rail block and a sliding rail block, and the sliding rail block is arranged on the upper sheath mechanism base 84 in a sliding manner through driving of an air cylinder; an upper sheath groove rail 86 which is obliquely arranged with the horizontal plane is fixedly arranged above the upper sheath mechanism base 84, a vibrating motor 32 is fixedly arranged on the lower surface of the upper sheath groove rail 86, the upper sheath groove rail 86 is higher than the sheath rail 85 in height, a spring column 48 which is connected with an air source and used for limiting a sheath is arranged at the discharge hole of the upper sheath groove rail 86, a sheath connecting block is arranged at one side of the discharge hole of the upper sheath groove rail 86, the sheath connecting block is cuboid and vertically arranged, a sheath connecting hole which is partially matched with the lower end of the sheath is arranged at the upper end of the sheath connecting block, a second rotating shaft 87 is fixedly arranged at the lower end of the sheath connecting block, the second rotating shaft 87 is rotatably arranged on the base of the upper sheath mechanism 15, a gear is fixedly arranged on the side surface of the second rotating shaft 87 which exceeds the needle base connecting block 49 and is meshed with the gear, and the rack 51 is slidingly arranged on the upper sheath mechanism base 84 and driven by a cylinder fixedly arranged on the upper sheath mechanism base 84; a sheath feeding hopper 88 is arranged at the feeding hole of the upper sheath groove rail 86, the sheath feeding hopper 88 is fixed on the upper sheath mechanism base 84, the lower hole of the sheath feeding hopper 88 is rectangular and is matched with the shape of the upper sheath groove rail 86, a reciprocating plate 89 driven by a cylinder is arranged in the sheath feeding hopper 88 in a sliding manner, the reciprocating plate 89 is rectangular, a gap is arranged between the lower end of the reciprocating plate 89 and the upper surface of the upper sheath groove rail 86, and the gap is larger than zero and smaller than the outer diameter of the small end of the sheath; the needle falling rail sheath pressing mechanism 16 comprises a sheath pressing mechanism 16 base fixed on the table top 1 of the automatic injection needle assembling machine, a sheath pressing cylinder 90 is fixedly arranged on the sheath pressing mechanism 16 base, six pressure heads are fixedly arranged on a piston rod of the sheath pressing cylinder 90, the pressure heads are opposite to a needle seat limiting die 3 rotating to the station on the second rotary table 12, and a photoelectric sensor 94 serving as a sheath sensor is fixedly arranged on the side surface of a cylinder body of the sheath pressing cylinder 90; the needle falling rail removing mechanism 17 comprises a fifth transverse driving cylinder fixed on the table top 1 of the automatic injection needle assembling machine, a piston rod of the fifth transverse driving cylinder is fixedly connected with a fifth sliding plate, the fifth sliding plate is horizontally and slidably arranged on a fifth fixing plate, the fifth fixing plate is vertically fixed on the table top 1 of the automatic injection needle assembling machine, a fifth vertical driving cylinder is fixedly arranged on the fifth sliding plate, a fifth driven plate is vertically and slidably arranged on the fifth sliding plate, a piston rod of the fifth vertical driving cylinder is fixedly connected with the fifth driven plate, six removing needle clamping cylinders 91 are fixedly arranged on the fifth driven plate, and the removing needle clamping cylinders 91 drive a clamping claw 40 arranged below the removing needle clamping cylinders to act so as to clamp the injection needles which are not sheathed, and a removing recovery bucket is arranged outside the position of the removing mechanism 17 and the second rotary table 12. The needle falling rail transferring and turning mechanism 18 comprises a transferring and turning mechanism 18 base fixed on the table top 1 of the automatic injection needle assembling machine, the transferring and turning mechanism 18 base is positioned on the connecting line of the second rotary table 12 and the third rotary table 20, a third rotary shaft is rotatably arranged on the transferring and turning mechanism 18 base, a second servo motor and a second speed reducer are fixedly arranged on the table top 1 of the automatic injection needle assembling machine, the second servo motor is connected with the second speed reducer, and an output shaft of the second speed reducer is fixedly connected with the third rotary shaft; a cuboid rotary seat 79 is fixedly arranged on the third rotary shaft, a needle seat limiting die 3 is arranged on each of four side faces of the rotary seat 79, a pressing plate 80 is slidably arranged on one side of the needle seat limiting die 3 on the side face, and the pressing plate 80 is driven by an air cylinder to press a needle seat which is horizontally or vertically downwards rotated and is already pressed with a sheath; the needle falling rail transferring and turning mechanism 18 further comprises a sixth transverse driving cylinder fixed on the table top 1 of the automatic injection needle assembling machine, a piston rod of the sixth transverse driving cylinder is fixedly connected with a sixth sliding plate, the sixth sliding plate is horizontally and slidably arranged on a sixth fixing plate, the sixth fixing plate is vertically fixed on the table top 1 of the automatic injection needle assembling machine, a sixth vertical driving cylinder is fixedly arranged on the sixth sliding plate, a sixth driven plate is vertically and slidably arranged on the sixth sliding plate, a piston rod of the sixth vertical driving cylinder is fixedly connected with the sixth driven plate, six transferring and turning needle clamping cylinders 92 are fixedly arranged on the sixth driven plate, the transferring and turning needle clamping cylinders 92 drive a clamping gripper 40 arranged below the transferring and turning needle clamping cylinders to clamp injection needles for transferring pressed jackets, and two limit positions of the sixth sliding plate horizontally slide are respectively right against a sleeve connecting needle through hole 21 on a third rotary table 20 positioned at a station of the sleeve connecting needle mechanism 22 and right against a needle seat limiting die 3 positioned on a second rotary table 12 positioned at the station of the transferring and turning mechanism 18. The sheath needle receiving mechanism 22 comprises a sheath needle receiving through hole 21 which rotates to the position of the sheath needle receiving mechanism 22 and a limiting cylinder which is fixed on the table top 1 of the automatic injection needle assembling machine, the end part of a piston rod of the limiting cylinder is fixedly connected with an injection needle falling limiting rod 93, the position of the limiting rod 93 is matched with the pressing plate 80 of the transferring turning mechanism 18, and the sheath needle receiving through hole 21 which rotates to the position of the sheath needle receiving mechanism 22 corresponds to the position of a needle seat which is vertically downwards pressed with a sheath on the rotating seat 79 of the transferring turning mechanism 18; the needle falling rail empty detection mechanism 23 comprises a support column 66 fixed on the table top 1 of the automatic injection needle assembling machine, six photoelectric sensors 94 are fixedly arranged on the support column 66, and the photoelectric sensors 94 are opposite to the sheath needle receiving through holes 21 which are rotated to the positions of the empty detection mechanism 23 on the third turntable 20; the needle falling rail finished product clamping mechanism 26 comprises an eighth transverse driving air cylinder fixed on the table top 1 of the automatic injection needle assembling machine, a piston rod of the eighth transverse driving air cylinder is fixedly connected with an eighth sliding plate, the eighth sliding plate is horizontally arranged on an eighth fixed plate in a sliding mode, the eighth fixed plate is vertically fixed on the table top 1 of the automatic injection needle assembling machine, an eighth vertical driving air cylinder is fixedly arranged on the eighth sliding plate, an eighth driven plate is vertically arranged on the eighth sliding plate in a sliding mode, a piston rod of the eighth vertical driving air cylinder is fixedly connected with the eighth driven plate, six finished product clamping air cylinders 95 are fixedly arranged on the eighth driven plate, the finished product clamping air cylinders 95 drive clamping claws 40 arranged below the finished product clamping air cylinders to clamp finished product injection needles, and a finished product collecting bucket is arranged outside the third rotary table 20 and at the position of the finished product clamping mechanism 26. The process for assembling the injection needle by using the automatic needle falling rail injection needle assembling machine comprises the following steps: s1: the needle seat is arranged on a needle seat limiting die 3 of a first rotary table 2, which is positioned at a station of the needle seat upper mechanism 4, through the needle seat upper mechanism 4, and the first rotary table 2 rotates clockwise until the needle seat limiting die 3 of the existing needle seat is positioned at a station of the needle seat upper mechanism 5; s2: the needle tube is arranged in an upper horn mouth of the needle tube through the needle-arranging mechanism 5, the first rotating disc 2 rotates clockwise until the needle tube is arranged on the needle tube and the needle tube limiting mould 3 is positioned at the station of the first needle-detecting mechanism 6; s3: the first needle detecting mechanism 6 detects needle bases which are not provided with needle tubes in the six needle bases and sends signals to the next station, namely the base picking mechanism 7; the first rotating disc 2 continues to rotate clockwise to the next station; s4: the base removing mechanism 7 performs the action or the non-action of removing the needle base of the needle tube which is not arranged according to the signal sent by the metal sensor 67 of the first needle detecting mechanism 6; the first rotating disc 2 continuously rotates clockwise to the position of the next station, namely the station of the riveting needle mechanism 8; s5: the first riveting part of the riveting mechanism 8 executes the action of riveting the needle, and the size of a bell mouth on the needle seat is reduced so as to realize the connection of the needle tube and the needle seat; the first rotating disc 2 continuously rotates clockwise to the second riveting part of the riveting needle mechanism 8, and the second riveting part executes the riveting needle action on the second needle seat in the clockwise direction; the first rotating disc 2 continuously rotates clockwise to the third riveting part of the riveting needle mechanism 8, and the third riveting part executes the riveting needle action on the third needle seat in the clockwise direction; the first rotating disc 2 continuously rotates clockwise to the fourth riveting part of the riveting needle mechanism 8, and the fourth riveting part executes the riveting needle action on the fourth needle seat in the clockwise direction; s6: the first rotating disc 2 continuously rotates clockwise to the next station, namely the fifth riveting part of the riveting needle mechanism 8; the fifth riveting part performs the action of riveting the needle on the fifth needle seat in the clockwise direction; the first rotating disc 2 continuously rotates clockwise to the sixth riveting part of the riveting needle mechanism 8, and the sixth riveting part executes the riveting needle action on the sixth needle seat in the clockwise direction; the first rotating disc 2 continuously rotates clockwise to the position of the next station, namely the position of the image detection mechanism 9; or S6: the first rotating disc 2 continuously rotates clockwise to the next station, namely the position of the image detection mechanism 9; s7: the image detection mechanism 9 shoots black and white photos, and workers visually inspect products with burrs on a screen arranged on the table top 1 of the automatic injection needle assembly machine or respectively send instructions of not transferring the products with burrs to the transfer mechanism 10 and the waste rejecting mechanism 11 and instructions of clamping the products with burrs by the waste rejecting mechanism 11 through comparison after shooting; the first rotating disc 2 continues to rotate clockwise to the next station, namely the position S8 of the transferring mechanism 10: the transferring mechanism 10 clamps and transfers the needle seat with the needle tube fixedly arranged on the needle seat to the upper silicone oil mechanism 19; s9: the silicone oil feeding mechanism 19 rotates sequentially and the silicone oil groove 81 vertically upwards feeds silicone oil to the needle tube; the needle receiving clamping cylinder 83 fixedly arranged on the fourth driven plate of the needle receiving seat mechanism 13 drives the clamping gripper 40 arranged below the needle receiving seat mechanism to act so as to clamp the injection needle and then transfer the injection needle with the silicone oil to the needle seat limiting die 3 at the station of the needle receiving seat mechanism 13; s10: the second rotary table 12 rotates anticlockwise until the second needle detecting mechanism 14 stops, the second needle detecting mechanism 14 detects the vacancy of the needle connecting seat limiting die 3 and sends an instruction to the next station upper sheath mechanism 15 to prevent the vacancy from being sheathed; the second turntable 12 continues to rotate counterclockwise to the next station; s11: the sheath is clamped onto the needle seat of the installed needle tube through the sheath feeding mechanism 15, and the second rotary table 12 continues to rotate anticlockwise to the next station; s12: the sheath pressing mechanism 16 executes the action of pressing the sheath to realize the connection of the sheath and the needle seat, and a sheath sensor on the sheath pressing mechanism 16 detects the needle seat lacking the sheath and gives a command for clamping and removing the needle seat without the sheath to be sent by the next station and removing mechanism 17; the second rotary table 12 continues to rotate clockwise to the next station; s13: the removing mechanism 17 clamps and removes needle bases which are not covered with the sheath into a recycling hopper of the removing mechanism 17 according to the instruction sent by the sheath sensor; the second turntable 12 continues to rotate counterclockwise to the next station; s14: the transferring and turning mechanism 18 clamps the needle seat with the sheath and transfers the needle seat to the rotating seat 79, and the rotating seat 79 rotates to realize the turning of the needle seat with the sheath, and then the needle seat is lowered into the sheath needle through hole 21 of the third turntable 20; the second turntable 12 continues to rotate counterclockwise; s15: the limit rod 93 is driven by the limit cylinder in the process that the needle stand after turning is lowered to the needle stand through hole 21 of the third turntable 20 by the needle stand mechanism 22 to ensure that the needle stand is vertically opposite to the needle stand through hole 21 in the process of falling; the third rotary table 20 continues to rotate counterclockwise to the next station; s16: the empty detection mechanism 23 detects the sheath needle receiving through hole 21 without a needle seat through the photoelectric sensor 94 and sends a command of not grabbing the protective cap to the clamping grabber 40 of the next station, namely the upper protective cap mechanism 24; the third rotary table 20 continues to rotate counterclockwise to the next station; s17: the upper cap mechanism 24 drives the dislocation baffle plate 33 to misplacement and translate the outermost cap at the bottom end of the cap track 28 for a certain distance, and then the cap clamping cylinder 39 acts to clamp and transfer the misplaced cap to the turned needle seat, and the third rotary table 20 continues to rotate anticlockwise to the next station; s18: the protective cap is pressed on the needle seat by the action of the protective cap pressing cylinder 41 of the protective cap pressing mechanism 25; s19: the injection needle finished product is clamped and transferred into the finished product collecting hopper by the action of the finished product clamping cylinder 95 of the finished product clamping mechanism 26.

The automatic injection needle assembling machine has the following action processes:

a certain amount of needle seat is added into the needle seat feeding hopper, a vibrating motor below the obliquely arranged upper needle seat groove rail is started, the needle seat gradually slides up to the lower end part of the needle seat groove rail in the height of the upper needle seat groove rail due to self weight and vibration (some needle seats which do not fall into the groove of the upper needle seat groove rail can fall into the groove of the upper needle seat groove rail in the subsequent process due to a continuously rotating shifting wheel), a limit post of the needle seat is arranged on the needle seat connecting block, the limit post is arranged above the needle seat connecting block through a spring, the limit post can extend through the driving of an air cylinder, when the air cylinder stops, the limit post retracts under the action of the spring without limiting the needle seat, so that the needle seat can freely slide into the needle seat rail, and when the air cylinder acts to press the needle seat of the outermost row in order to match the needle seat to fall into the needle seat rail accurately, the sliding track block is driven by the air cylinder to abut against the fixed track block, the air cylinder fixed on the base of the upper needle seat mechanism acts, so that the rack ascends to enable the gear on the fourth gear to rotate, and therefore the needle seat connecting block rotates along with the gear (in order to further reduce misoperation, the needle seat can not fall off from the needle seat connecting hole of the needle seat connecting block in the rotating process of the needle seat connecting block, the limit flexible block connected with the air cylinder is arranged on the needle seat connecting block, the limit flexible block is arranged in the needle seat connecting hole of the needle seat connecting block, the limit flexible block tightly presses the needle seat from the side surface when the air cylinder drives), one end of the needle seat connecting block provided with the needle seat connecting hole rotates to the upper side of the needle seat track, the needle seat falls into the needle seat track, and therefore falls into the needle seat limit mould on the first turntable (in the process that the sliding track block leans against the fixed track block, the first rotating disc rotates clockwise so that the empty needle seat limiting die is positioned right below the needle seat track; the cylinder under the thimble part is driven, the thimble part is upwards to jack the needle tube positioned between the second plate and the third plate and positioned right above the thimble groove to the highest position due to the arrangement of the thimble groove, at the moment, the first rotating disc continuously rotates clockwise to enable the needle seat limiting die after the needle seat is assembled to be positioned right below the needle falling rail of the needle feeding mechanism (sufficient needle tube is firstly put into the needle box before the assembly machine is started and the needle tube is firstly kept to be vertically arranged when the assembly machine is placed), then the rail closing cylinder acts to enable the sliding part of the needle falling rail to be abutted against the fixed part, then the needle pushing cylinder acts to push the needle tube positioned in the thimble groove of the thimble part into the needle falling rail through the needle pushing sponge, so that the needle tube falls into the upper horn mouth of the needle seat (the cylinder under the thimble part is reset at the same time of the process), then the rail closing cylinder and the needle pushing cylinder are reset, at the moment, the first rotating disc continuously rotates clockwise to enable the needle seat limiting die after the needle seat is assembled to be positioned in the front of the metal sensor of the first needle detecting mechanism, and then the first rotating disc stops rotating; the metal sensor detects that, for the needle seat without the needle tube, the first needle detecting mechanism sends out an instruction of the seat picking mechanism to pick and pick the needle seat at the corresponding position; at this time, the first rotating disc continuously rotates clockwise to enable the needle base limiting die after the needle tube and the needle base are arranged to be positioned under the needle base clamping cylinder of the base picking mechanism; the needle base removing mechanism clamps the needle base without the needle tube according to the instruction sent by the first needle detecting mechanism, if the needle base without the needle tube does not act, the first rotating disc continuously rotates clockwise to enable the needle base limiting die after the needle tube and the needle base are arranged to be positioned under the riveting component, then the riveting component moves to reset after the riveting needle is moved, and the first rotating disc continuously rotates clockwise to enable the needle base after the needle tube is riveted to be positioned under a black-white camera of the image detecting mechanism; after shooting the picture of the needle tube, the black-and-white camera is transmitted to a display screen and then is compared with the picture stored in a computer, if the burr is large, a command is sent to a subsequent transfer mechanism so that the transfer mechanism does not transfer the needle seat with the burr (the burr is clamped and removed by a waste removing mechanism along with the subsequent rotation of the first rotating disc); the first rotating disc continuously rotates clockwise to enable the needle seat after riveting the needle tube to be located under a needle transferring cylinder of a transferring mechanism, a second transverse driving cylinder, a second vertical driving cylinder and a needle transferring cylinder of the transferring mechanism sequentially move to finish transverse movement and vertical downward movement, the second vertical driving cylinder and the second transverse driving cylinder sequentially move vertically upwards after needle seat clamping, the needle transferring cylinder moves vertically downwards after the second vertical driving cylinder moves horizontally upwards, the needle clamping cylinder does not clamp the needle seat after needle seat clamping, the needle seat falls onto a needle seat limiting mould of the rotating seat, the second transverse driving cylinder, the second vertical driving cylinder and the needle transferring cylinder reset, a pressing plate of the silicone oil feeding mechanism moves to press the needle seat on the rotating seat after driving the silicone oil tank upwards to feed silicone oil to the needle tube, a fourth vertical driving cylinder of the needle receiving seat mechanism performs similar movement to the second vertical driving cylinder after the rotating seat rotates again, and the needle receiving and needle clamping cylinder performs similar movement to the needle transferring cylinder to clamp the needle seat of the needle seat after the silicone oil is finished to clamp the needle seat of the needle seat on the needle seat of the needle seat after the needle tube is clamped and transferred to the needle seat of the needle seat on the needle seat of the second rotating disc; the second turntable rotates anticlockwise, and the received needle seat of the silicone oil needle tube is moved to the front of a metal sensor of the second needle detecting mechanism; the metal sensor detects an empty needle seat limiting die without a needle seat and sends a command of not sleeving a sheath to a subsequent sheath sleeving mechanism; the second turntable continuously rotates anticlockwise so that the needle seat is positioned right below a sheath track of an upper sheath mechanism (a sufficient amount of sheath is put into a sheath feeding hopper before the assembly machine is started, the sheath falls into a groove of an upper sheath groove rail due to vibration and self-weight matching reciprocating movement of a reciprocating plate) (a discharge hole of the upper sheath groove rail of the upper sheath mechanism adopts a limit spring column similar to the discharge hole of the upper needle seat mechanism, the limit spring column extends out firstly to block the sheath of the lowest end row of the upper sheath groove rail, when a sheath connecting block abuts against the lowest end of the upper sheath groove rail, the limit spring column retracts due to the driving of an air cylinder, the sheath of the lowest end row falls into a sheath connecting hole of the sheath connecting block due to self weight and vibration), the air cylinder action of a sliding track block of the sheath track enables the sheath track to be combined together, and at the moment, the gear rack mechanism below the sheath connecting block is driven to act, and the sheath connecting block rotates to complete the sheath transferring to the sheath track, and the sheath connecting block is sleeved on the needle seat; the second turntable continuously rotates anticlockwise so that a needle seat sleeved with the sheath is positioned right below a sheath pressing cylinder of the sheath pressing mechanism, (a lateral abutting cylinder used for pressing the sheath is also arranged on a sheath pressing mechanism base, a piston rod of the lateral abutting cylinder is fixedly connected with an abutting plate), the lateral abutting cylinder acts, the abutting plate is pushed to the sheath (the abutting plate is provided with a semicircular notch close to the edge of the sheath, a pressing cylinder is also arranged opposite to the lateral abutting cylinder on the sheath pressing mechanism base, the lateral abutting cylinder and the pressing cylinder enable the sheath to be positioned between the lateral abutting cylinder) acts while the lateral abutting cylinder acts to press the sheath from two lateral sides (a piston rod of the pressing cylinder is fixedly connected with an elastic pressing block), then the sheath pressing cylinder acts to enable the sheath to be pressed firmly on the needle seat and then reset (in order to ensure good pressing effect, the mode of pressing twice is still adopted, the lateral abutting cylinder and the abutting cylinder resets for the first time), and an inductor arranged on the lateral surface of the sheath pressing cylinder body detects the sheath which is not installed, and then signals are sent to a subsequent rejection mechanism to rejection the sheath which is not installed; the second turntable continuously rotates anticlockwise so that the needle seat after the sheath is pressed is positioned right below a removing needle clamping cylinder of the removing mechanism; the instruction sent by the sheath sensor clamps the needle seat for eliminating the unpressed sheath, if the needle seat is the needle seat with the pressed sheath, the needle seat does not act, and the second turntable continues to rotate anticlockwise, so that the needle seat is positioned under the transferring and turning needle clamping cylinder of the transferring and turning mechanism; the movement of the transferring and turning mechanism respectively completes downward movement, needle seat clamping, upward movement, transverse movement (moving towards a cuboid-shaped rotating seat arranged on a third rotating shaft), downward movement and loosening of the clamping movement, so that the needle seat is transferred onto a needle seat limiting die of the cuboid-shaped rotating seat (the movement processes in different directions are realized through a sixth transverse driving cylinder and a sixth vertical driving cylinder), then a pressing plate on the rotating seat is driven by the cylinder to press the needle seat so as to prevent the needle seat from falling off from the rotating seat in the subsequent rotating process of the rotating seat, then the rotating seat is driven to rotate for 90 degrees, the rotating seat continues to rotate for 90 degrees, meanwhile, a third rotating disc rotates clockwise, a sheath needle receiving through hole on the third rotating disc is rotated to be opposite to the rotating seat, and an injection needle falling limiting rod on one side is driven to extend when the rotating seat rotates, so that the needle seat is accurately fallen; the third rotary table continues to rotate clockwise so that the needle seat falling into the through hole of the sheath needle is positioned at the photoelectric sensor of the empty detection mechanism, and the photoelectric sensor sends a signal to the subsequent cap feeding mechanism to prevent the cap from being fed to the corresponding station after detecting the empty position (namely, the needle seat does not fall into the through hole of the sheath needle when the needle is transferred to turn); the third rotary disk continuously rotates clockwise to enable the needle seat to be positioned under a cap clamping cylinder of the upper cap mechanism, the cap clamping cylinder is driven (a seventh transverse driving cylinder acts to enable the cap clamping cylinder to transversely move, a seventh vertical driving cylinder acts to enable the cap clamping cylinder to vertically move, the cap clamping cylinder drives a clamping and grabbing action positioned under the cap clamping cylinder to clamp the cap to the bottom of the turned needle seat), the cap clamping cylinder firstly moves towards a dislocation blocking plate at the lowest end part of the cap track and vertically moves downwards, the cap clamping on the dislocation blocking plate which is dislocated after being driven by the dislocation cylinder moves vertically upwards and then transversely moves to the position right above a through hole of a protective needle on the third rotary disk and then vertically moves downwards, the cap is placed on the needle seat (a sufficient amount of cap is placed into a cap feeding hopper before an automatic assembling machine is started), the protective cap gradually falls into the chute of the protective cap track due to self weight and vibration matching spiral protective cap conveying track and spiral sliding rail protective cap, in order to prevent the protective cap from reversely falling into the chute of the protective cap track, a notch is arranged on the angle steel spiral sliding rail and is close to the vertical plate at the spiral protective cap conveying track, and an inclined bulge is arranged on the transverse plate at the notch, so that if the reverse protective cap is downward at the large-size end, the protective cap moves upwards due to the inclined bulge, the upper part is just the notch, the reverse protective cap falls from the notch to the protective cap collecting hopper below for re-feeding, the forward protective cap continues to slide to the spiral sliding rail due to the matching of the distance between the inclined bulge and the vertical plate and the size of the small-size end of the protective cap, the protective cap slides downwards along the protective cap track, the outermost protective cap is blocked by the dislocation blocking plate, when the clamping and transferring are needed to be carried out on the third turntable, the dislocation cylinder acts to enable the dislocation baffle plate to slightly translate and then to translate just right facing the cap clamping cylinder after the transverse movement but still keeping the lowest end of the cap rail pressed against; after the cap clamping cylinder is reset, the third rotary table continuously rotates clockwise to enable the needle seat to be positioned right below the cap pressing cylinder of the cap pressing mechanism, then the cap pressing cylinder acts and is pressed down for two times, and the first time is used as pre-pressing (if the cap is needed to be pressed instead of pressing the cap, the pressing block of the cap pressing mechanism is driven to translate to finish the work of pressing the cap); the third rotary table continuously rotates clockwise to enable the needle seat to be located under a finished product clamping cylinder of the finished product clamping mechanism, and then the finished product clamping mechanism sequentially completes downward movement, clamping of the finished product injection needle, upward movement, transverse translation and stopping of the finished product clamping cylinder (namely putting down of the finished product injection needle) to complete assembly of the finished product injection needle.

The second needle detecting mechanism detects that the front part is not transferred to the station on the second rotary table due to burrs, and a sheath is not needed. The automatic assembly of the protective cap can be realized, manual needle checking is not needed, and the assembly automation is truly realized; the turntable type is adopted instead of the chain type, so that the rejection rate is greatly reduced; and the station is many, a plurality of needle bases, a plurality of needle tubes, a plurality of sheaths, a plurality of protective caps, a plurality of sheaths and a plurality of protective caps can be arranged at one time (now 'one person is on top of four people'), the efficiency is greatly improved, the needle detection procedure is many and more comprehensive, the misoperation is very few, the alarm is clear, and the finished product is obtained after the assembly machine is processed. Utilize vibration and dead weight cooperation spiral slide rail, spiral helmet delivery track can realize that the helmet is automatic to drop to the helmet track, dislocation baffle plate and dislocation cylinder's setting can be with the helmet dislocation that is in helmet track low end outmost to move to a distance (and because dislocation baffle plate is leaning on helmet track low end) that leaves the helmet track a section of level slightly, then cooperate the helmet to press from both sides the action of cylinder and can realize very accurately placing the helmet on the needle file (i.e. needle file back) after having turned one's body (because in case the helmet placement position slightly deviates slightly, the helmet is very easily broken by the pressure when the follow-up pressure helmet for the disability rate rises greatly), press the helmet cylinder and even press twice at the in-process of pressure helmet, the first pre-compaction, the second repress, both guarantee the pressure of helmet and also avoid the easy appearance helmet of once pressing to be pressed bad condition. The setting of the hot stamping block enables the assembly machine to also realize automatic stamping of the protective cap (one small stamping block, one stamping point enables the protective cap to be connected with the needle seat through melting). The upper protective cap adopts a clamping and grabbing mode to ensure the accuracy of the position of the upper protective cap (the upper protective cap is required to be accurate, otherwise, the rear protective cap is easy to crush, and the upper needle seat, the upper needle and the upper protective sleeve are provided with guide < such as the guide of a needle seat limit mould of the upper needle seat, the guide of a needle seat bell mouth of the upper needle and the guide of the upper protective sleeve with the needle >, so that the clamping and grabbing mode is not required, the upper needle, the upper protective sleeve) the spiral slide rail in the upper protective cap mechanism inclines towards the rotation axis of the upper protective cap mechanism, namely the outer edge of the bottom plate of the angle steel-shaped slide rail is higher than the inner edge of the bottom plate, namely the corner part of the angle steel, so that the protective cap which is vibrated and slipped from the upper protective cap hopper is ensured to be propped against the spiral slide rail; the upper needle seat groove rail is matched with the upper needle seat groove rail through vibration and dead weight, a row of four or six needle seats are transferred into the needle seat rail through the gear rack mechanism, the shifting wheel is arranged and is close to the upper needle seat groove rail, so that the needle seats which do not correctly fall into the groove of the upper needle seat groove rail are shifted to a higher position, the needle seats are likely to fall into the groove when the dead weight and the vibration fall down again later so as to realize the transfer of the follow-up needle seats and fall onto the needle seat limiting mould, the upper needle box can prevent the falling needle from being positive when the falling needle is additionally placed due to the inclined arrangement of the needle seat box, and the falling needle is mainly detected by burrs, so that the burr detection is a big round dot >. The rollers are arranged at the two ends of the push needle frame in a rolling way, so that the abrasion of the push needle frame or the upper needle box is reduced in the process of horizontally moving the push needle, and the service life of the whole equipment is prolonged. The connection mode of the picking seat needle clamping cylinder and the clamping gripper below the picking seat needle clamping cylinder can be that the piston rod of the picking seat needle clamping cylinder is fixedly connected with the upper end of a connecting rope, the lower end of the connecting rope is fixedly connected with two ropes, one claw of the clamping gripper is fixedly connected with the other claw (the upper ends of the two claws are hinged together), when an injection needle is required to be clamped, the piston rod of the picking seat needle clamping cylinder moves upwards to enable the lower ends of the two claws of the clamping gripper to be close to tightening so as to finish the work of clamping the injection needle, and the picking seat needle clamping cylinder does not need to clamp the injection needle. The image detection mechanism is used for shooting black-and-white photos and comparing photos stored in the computer in advance, if burrs are large, an instruction is sent to the transfer mechanism on the next station, the images are not clamped with the burrs during transfer, and the images are turned along with the first rotating disc and then are removed by the rejecting mechanism, so that automation of needle detection is realized, manual needle detection is not needed, and real assembly automation is realized. The transfer mechanism has the same structure as the picking seat mechanism, but has different actions, the transfer mechanism almost has the whole clamping and full releasing (according to the burr condition of the needle tube detected by the front image detection mechanism, the burr is not clamped at the transfer mechanism, the picking seat mechanism clamps and rejects and recovers the needle tube to the next procedure), the picking seat mechanism only clamps and grabs the needle seat which is not provided with the needle according to the signal transmitted by the front sensor (the metal sensor of the first needle detection mechanism), and two rows of eight (or twelve) clamping cylinders are arranged on the transfer mechanism to simultaneously finish two procedures: 1. transferring the injection needle (here, a semi-finished product, namely, only the needle tube is riveted on the needle seat) on the first rotary disc of the needle feeding device to a silicone oil feeding mechanism; 2. the silicone-coated injection needle (here again a semifinished product, i.e. the needle tube is riveted on the needle holder and the silicone oil is applied on the needle tube) is transferred to the first rotary disc of the upper jacket device. The waste rejecting mechanism and the transferring mechanism have the same structure; of course, the connection mode of the needle clamping cylinder of the picking seat mechanism, the picking waste mechanism and the transferring mechanism and the clamping gripper below the needle clamping cylinder can be that the piston rod of the cylinder is fixedly connected with the upper end of a connecting rope, the lower end of the connecting rope is fixedly connected with two ropes, one rope is fixedly connected with the upper end of one claw of the clamping gripper, the other rope is fixedly connected with the upper end of the other claw of the clamping gripper (the two claws are hinged together at the middle upper part, and a compressed spring is arranged at the upper part of the hinged part), when an injection needle is required to be clamped, the piston rod of the needle clamping cylinder of the picking seat moves upwards to enable the upper ends of the two claws of the clamping gripper to be close to the lower ends of the claws to be separated until the object to be clamped is positioned at the lower ends of the claws of the clamping gripper, and then the cylinder stops acting, so that the two claws of the clamping gripper are tightened to finish the work of clamping a semi-finished injection needle without the need to clamp the injection needle. The fourth sliding plate is fixedly connected to the second sliding plate, so that the semi-finished injection needle product on the first rotary table is transferred to the second rotary table when the transfer mechanism transfers the semi-finished injection needle product on the upper silicone oil mechanism, the efficiency is improved, and the number of transfer cylinders is reduced. The discharge gate department of going up sheath grooved rail sets up the spacing spring post of being used for the sheath that links to each other with the air supply, goes up the discharge gate one side of sheath grooved rail and sets up the sheath splicing block, and the sheath splicing block is cuboid and vertical setting, and the sheath splicing block upper end sets up the sheath spliced hole with sheath lower extreme part adaptation, simple structure like this, but guarantees the accuracy that shifts the sheath, goes up the sheath all and is a row of four or six sheaths of going up sheath grooved rail lower extreme at every turn. The jacket inductor is arranged on the side surface of the cylinder body of the jacket pressing cylinder, so that the jacket pressing action of the needle seat which is not covered with the jacket can be avoided. The upper sheath mechanism is characterized in that a sheath feeding hopper of the upper sheath mechanism adopts a cover plate type hopper, a groove-shaped baking oven is arranged below the hopper, the groove-shaped baking oven is matched with the shape of the lower part of the hopper, and the baking oven is fixedly arranged on the table top of the automatic injection needle assembling machine; or one side of the sheath feeding hopper of the sheath feeding mechanism is provided with an electric hair drier which is fixedly arranged on the table top of the automatic injection needle assembling machine. The setting of gag lever post can guarantee that the needle file after changeing the body is accurate to be shifted to in its sheath needle through-hole that connects of third carousel, has reduced the maloperation.

The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the scope of the invention.

Claims

1. The upper protective cap equipment of the automatic injection needle assembly system is characterized by comprising a third rotary table which is rotationally connected with a table top of the automatic injection needle assembly machine, wherein a plurality of groups of arranged protective sleeve needle through hole groups are fixedly arranged on the third rotary table in an annular array manner, each group of protective sleeve needle through hole groups comprises a plurality of protective sleeve needle through holes, the protective sleeve needle through holes are arranged close to the edge of the third rotary table, the aperture of each protective sleeve needle through hole is smaller than the maximum outer diameter of a protective sleeve and can be inserted into the protective sleeve, and a protective sleeve needle connecting mechanism, an empty detection mechanism, an upper protective cap mechanism, a protective cap pressing mechanism and a finished product clamping mechanism are sequentially arranged on the table top of the automatic injection needle assembly machine outside the protective sleeve needle through holes along the rotation direction of the third rotary table;

the sheath receiving needle mechanism comprises a sheath receiving needle through hole which is rotated to a sheath receiving needle mechanism station and a limiting cylinder which is fixed on the table top of the automatic injection needle assembling machine, the end part of a piston rod of the limiting cylinder is fixedly connected with an injection needle falling limiting rod, the position of the limiting rod is matched with a pressing plate of the transferring body turning mechanism, and the sheath receiving needle through hole which is rotated to the sheath receiving needle mechanism station corresponds to the position of a needle seat which is vertically downwards pressed with a sheath on a rotating seat of the transferring body turning mechanism;

The upper cap mechanism comprises an upper cap mechanism base fixed on the table top of the automatic injection needle assembling machine, the upper cap mechanism base is in a frame form, a cap rail is arranged on the upper cap mechanism base, the cap rail is obliquely arranged with a horizontal line, the lower end of the cap rail is positioned at one side of a sleeve needle through hole of the position of the upper cap mechanism, which is rotated on a third turntable, the cap rail is provided with a chute matched with the small end of the cap, the higher end of the cap rail is connected with the lower end of a screw cap conveying rail of the cap feeding mechanism, the higher end of the screw cap conveying rail is connected with an angle steel-shaped screw slide rail, the screw slide rail is inclined towards the rotation axis, the lower end of the screw slide rail is connected with the higher end of the screw cap conveying rail, the higher end of the screw slide rail is connected with a cap feeding hopper, and the lower surface of the cap feeding hopper is fixedly provided with a vibrating motor; one side of the lower end of the protective cap track, which is close to the third turntable, is provided with a dislocation blocking plate, a semicircular hole for receiving the protective cap is arranged on the dislocation blocking plate, the side surface of the dislocation blocking plate is fixedly connected with a piston rod of a dislocation cylinder, and the dislocation cylinder is fixedly arranged on the table top of the automatic injection needle assembling machine; the upper protective cap mechanism further comprises a seventh transverse driving air cylinder fixed on the table top of the automatic injection needle assembling machine, a piston rod of the seventh transverse driving air cylinder is fixedly connected with a seventh sliding plate, the seventh sliding plate is horizontally and slidably arranged on a seventh fixing plate, the seventh fixing plate is vertically fixed on the table top of the automatic injection needle assembling machine, the seventh sliding plate is fixedly provided with a seventh vertical driving air cylinder, the seventh sliding plate is vertically and slidably provided with a seventh driven plate, the piston rod of the seventh vertical driving air cylinder is fixedly connected with the seventh driven plate, the seventh driven plate is fixedly provided with four or six protective cap clamping air cylinders, the protective cap clamping air cylinder is arranged below the protective cap clamping air cylinder in a driving mode to clamp a protective cap to the bottom of a turned needle seat, and two limiting positions of the horizontal sliding of the seventh sliding plate are respectively right opposite to a protective cap receiving needle through hole on a third turntable positioned at the station of the upper protective cap mechanism and right opposite to a misplacement blocking plate which is dislocated after being driven by the misplacement air cylinder;

The protective cap pressing mechanism comprises a protective cap pressing mechanism base fixed on the table top of the automatic injection needle assembling machine, a protective cap pressing cylinder is fixedly arranged on the protective cap pressing mechanism base, four or six pressure heads are fixedly arranged on a piston rod of the protective cap pressing cylinder, and the pressure heads are right opposite to a protective cap receiving needle through hole of the station, which is rotated on the third turntable;

the protective cap pressing mechanism further comprises a protective cap scalding block, the protective cap scalding block is connected with a piston rod of a horizontally arranged cylinder, and the scalding block is connected with the resistance wire type heater;

the automatic injection needle assembling machine further comprises a first rotary table rotationally connected with the table top of the automatic injection needle assembling machine, a plurality of arranged needle seat limiting molds are fixedly arranged on the first rotary table in an annular array mode, and the needle seat limiting molds are matched with the inner wall of the needle seat in shape and are arranged close to the edge of the first rotary table.

2. The cap loading device of the automatic injection needle assembling system according to claim 1, wherein the empty detection mechanism comprises a support column fixed on a table top of the automatic injection needle assembling machine, four or six photoelectric sensors are fixedly arranged on the support column, and the photoelectric sensors are right opposite to the through holes of the protective sleeve needle which are rotated to the positions of the empty detection mechanism on the third turntable.

3. The upper protective cap device of the automatic injection needle assembling system according to claim 1, wherein the finished product clamping mechanism comprises an eighth transverse driving cylinder fixed on a table top of the automatic injection needle assembling machine, a piston rod of the eighth transverse driving cylinder is fixedly connected with an eighth sliding plate, the eighth sliding plate is horizontally and slidably arranged on an eighth fixed plate, the eighth fixed plate is vertically fixed on the table top of the automatic injection needle assembling machine, an eighth vertical driving cylinder is fixedly arranged on the eighth sliding plate, an eighth driven plate is vertically and slidably arranged on the eighth sliding plate, a piston rod of the eighth vertical driving cylinder is fixedly connected with the eighth driven plate, four or six finished product clamping cylinders are fixedly arranged on the eighth driven plate, the finished product clamping cylinders drive clamping actions arranged below the finished product clamping cylinders to clamp the finished product injection needles, and a finished product collecting bucket is arranged at the position of the finished product clamping mechanism and outside the third turntable.