Veterinary syringe with stable output

Abstract

The utility model relates to a veterinary syringe stable in output. The veterinary syringe comprises a syringe body, a through type lead screw motor, a guide pipe and a piston assembly. The piston assembly sequentially penetrates through the injection barrel, the through type lead screw motor and the guide pipe. Cavities with the same radial cross sections are formed in the injection cylinder body; the injection barrel body, the through type lead screw motor and the guide pipe are coaxially connected in sequence; an inlet / outlet is formed in the head end of the syringe; the piston assembly comprises a piston head, a screw rod and a sliding pin shaft which are connected in sequence; the tail end of the piston head is coaxially connected with the head end of the screw rod; the middle part of the lead screw is coaxially connected with a through type lead screw motor; the sliding pin shaft is radially arranged at the tail end of the screw rod; the guide pipe is provided with a sliding groove in axial sliding fit with the end of the sliding pin shaft. Accurate control of axial movement of the piston head can be achieved, and the amount of medicine continuously entering and exiting from the inlet and the outlet is more stable.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of medical apparatus and instruments, in particular to a stable output's veterinary syringe. BACKGROUND

[0002] Veterinary syringe is a kind of injection apparatus for injecting medicine to animals.The utility model patent multifunctional veterinary continuous injector with the announcement number CN2533877Y discloses a kind of veterinary continuous injector;The stop bolt 29 for being adjusted front and back is equipped on the handle 1, for limiting the position of the pushing end 18 of lever 16 and piston rod 5, control the movement distance of piston rod 5, to control injection medicine amount.But actually the direct determining factor of this injection medicine amount is the actual movement distance of piston rod 5.In the patent, when injecting, operator pulls the free end 17 of lever 16, drives piston rod 5, piston 6 forward through pushing end 18, and pushes the liquid medicine in charging barrel 2.Only when operator pulls the free end 17 of lever 16 to the bottom each time, can guarantee that injection medicine amount is in relatively stable state each time.But in continuous injection process, operator is difficult to guarantee that the free end 17 of lever 16 can be pulled to the bottom each time, and the veterinary continuous injector is difficult to guarantee continuous stable output. UTILITY MODEL CONTENTS

[0003] The utility model aims at solving the above-mentioned problem, and provides a stable output's veterinary syringe.

[0004] The utility model discloses a technical scheme of stable output's veterinary injection cylinder includes injection cylinder body, through type screw rod motor, guide pipe, piston assembly, piston assembly penetrates injection cylinder body, through type screw rod motor, guide pipe in proper order, piston assembly moves axially relative to injection cylinder body, through type screw rod motor, guide pipe, the axial movement of piston assembly is powered for through type screw rod motor, and the axial movement of piston assembly is guided for guide pipe, and the axial movement of piston assembly inside injection cylinder body determines single injection amount, and the inside of injection cylinder body is the cavity of same radial section, and injection cylinder body, through type screw rod motor, guide pipe are coaxial in proper order and meet, and the head end of injection cylinder body is equipped with import and export, to supply medicine to go in and out injection cylinder body, and piston assembly includes piston head, screw rod, sliding pin shaft that meet in proper order, and piston head is closed in and encloses in injection cylinder body inside, and tail end and screw rod head end coaxial meet, and screw rod middle part and through type screw rod motor coaxial meet, and sliding pin shaft is radially arranged in screw rod tail end, and guide pipe is equipped with the sliding slot of axial sliding cooperation with sliding pin shaft end part, and through type screw rod motor output fixed displacement angle, and through screw rod acts on piston head, makes piston head move axially inside injection cylinder body, and the sliding slot is matched with sliding pin shaft, and blocks screw rod autorotation, guarantees that the rotational speed of through type screw rod motor output to screw rod is equal to the axial movement speed of piston head times screw rod lead, to reach the purpose of accurate dosing, and piston head and screw rod are coaxial arrangement, can guarantee that the axial movement of screw rod head end can be evenly acted on piston head, increase the stability of piston head axial movement, and then strengthen the accurate control of piston head axial movement, and the axial movement of piston head is accurately controlled, and the medicine amount of import and export continuous entry is also more stable.

[0005] Preferably, the side wall of the piston head is nested with several sealing rings to prevent drug leakage to the side of the injection cylinder body close to the screw rod.

[0006] Preferably, the sliding grooves are symmetrically arranged on both sides of the guide pipe to ensure that the guide pipe provides a more stable guiding effect for the axial movement of the screw rod.

[0007] Preferably, the head end of the injection cylinder body is provided with a tapered cavity, the import and export are arranged on the cavity wall of the tapered cavity, the head end of the piston head is provided with a conical boss matched with the tapered cavity, and the conical boss cooperates with the tapered cavity to ensure that as much drug as possible in the injection cylinder body can be discharged from the import and export.

[0008] Preferably, the guide tube head end is provided with a flange; the stable output animal injection cylinder further comprises a guide tube connecting assembly; the guide tube connecting assembly comprises a guide tube connecting plate, a sinking screw, and a mounting screw A; the guide tube connecting plate is provided with a screw rod through hole A matched with the screw rod, a plurality of sinking holes, and a plurality of connecting holes C; the screw rod through hole A is arranged at the center position of the guide tube connecting plate for the screw rod to pass through; the sinking holes and the connecting holes C are uniformly distributed around the screw rod through hole A; the sinking screw passes through the sinking hole and is connected with the flange, so that the guide tube is detachably connected with the guide tube connecting plate; the mounting screw A passes through the connecting hole C and is connected with the tail end of the through-type screw rod motor, so that the through-type screw rod motor is detachably connected with the guide tube connecting plate; the guide tube connecting assembly realizes the detachable connection of the guide tube and the through-type screw rod motor, and facilitates the replacement and maintenance of the guide tube and the through-type screw rod motor.

[0009] Further, the flange is provided with a radial groove A matched with the sliding groove; the guide tube connecting plate is provided with a radial groove B matched with the radial groove A; the sliding pin shaft can be sequentially slid into the radial groove A and the radial groove B along the sliding groove, so that the length of the guide tube can be shortened, and the structure of the entire stable output animal injection cylinder is more compact.

[0010] Further, the screw rod head end is threadedly connected with the piston head tail end, so as to realize the detachable connection of the screw rod and the piston head; the piston assembly further comprises a lock nut; the lock nut is threadedly connected with the screw rod head end; the end of the lock nut abuts against the tail end of the piston head; the lock nut can prevent the threaded connection between the piston head and the screw rod head end from loosening.

[0011] Further, the tail end of the screw rod is provided with a radial hole matched with the sliding pin shaft; the sliding pin shaft is inserted into the radial hole; the sliding pin shaft and the screw rod are detachably connected.

[0012] Further, the tail end face of the screw rod is provided with a fastening screw hole; the piston assembly further comprises a jack screw; the jack screw is threadedly matched with the fastening screw hole; the jack screw abuts against the side face of the sliding pin shaft; the jack screw can jam the sliding pin shaft to prevent the sliding pin shaft from sliding relative to the radial hole.

[0013] Further, the tail end of the injection cylinder body is provided with an outwardly extending convex edge; the stable output animal injection cylinder further comprises a cylinder body connecting assembly; the cylinder body connecting assembly comprises a cylinder body connecting plate, a compression ring, a bolt and nut assembly, and a mounting screw; the head end surface of the cylinder body connecting plate is provided with a groove a matching the convex edge, connecting hole a, connecting hole b, and a lead screw through hole b corresponding to the middle part of the lead screw; the lead screw through hole b can pass through the lead screw; the compression ring is sleeved on the lower end of the injection cylinder body and abuts against the convex edge; the compression ring can press the convex edge to achieve the closed connection of the tail end of the injection cylinder body and the cylinder body connecting plate; the convex edge is embedded in the groove a; the bolt and nut assembly connects the compression ring and the cylinder body connecting plate through the connecting hole a to achieve the detachable connection of the injection cylinder body and the cylinder body connecting plate; the mounting screw b is screwed with the connecting hole b through the through lead screw motor head end to achieve the detachable connection of the through lead screw motor and the cylinder body connecting plate; the cylinder body connecting assembly realizes the detachable connection of the through lead screw motor and the injection cylinder body, and facilitates the replacement and maintenance of the through lead screw motor and the injection cylinder body.

[0014] Further, the groove a covers part of the area of the connecting hole a, so that the convex edge extends outward as much as possible, increases the contact area of the compression ring and the convex edge, and improves the connection stability of the injection cylinder body and the cylinder body connecting plate.

[0015] The stable output animal injection cylinder has the following advantages:

[0016] (1) The sliding groove of the utility model cooperates with the sliding pin shaft to block the rotation of the lead screw, ensures that the rotational speed of the through lead screw motor to the lead screw output multiplied by the lead screw pitch is equal to the axial movement speed of the piston head, so as to achieve the purpose of precise drug addition; the piston head is coaxially arranged with the lead screw, which can ensure that the axial movement of the head end of the lead screw can uniformly act on the piston head, increase the stability of the axial movement of the piston head, and further strengthen the precise control of the axial movement of the piston head; the axial movement of the piston head is precisely controlled, and the amount of drugs continuously input and output at the inlet and outlet is also more stable;

[0017] (2) The conical boss of the utility model cooperates with the conical cavity to ensure that as much as possible of the drugs in the injection cylinder body can be discharged from the inlet and outlet;

[0018] (3) The guide pipe connecting assembly and the cylinder body connecting assembly of the utility model can realize the detachable assembly of the stable output animal injection cylinder, so as to facilitate the later replacement and maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a perspective view of the stable output animal injection cylinder of the utility model;

[0020] Figure 2 is Figure 1 a half sectional view of the utility model;

[0021] Figure 3is Figure 2 I enlarged view of;

[0022] Figure 4 is a perspective view of the piston assembly;

[0023] Figure 5 is a perspective view of the barrel connecting plate Figure 1 ;

[0024] Figure 6 is a perspective view of the barrel connecting plate Figure 2 ;

[0025] Figure 7 is a perspective view of the guide tube connecting plate;

[0026] Figure 8 is a practical photograph of the stable output animal injection barrel of the utility model;

[0027] In the figure: 1. injection barrel, 11. import and export, 12. convex edge, 13. cone cavity, 2. through type screw rod motor, 21. convex part, 3. guide tube, 31. sliding groove, 32. flange plate, 321. radial groove A, 41. piston head, 411. conical boss, 412. sealing ring, 42. screw rod, 421. fastening screw hole, 422. radial hole, 43. sliding pin shaft, 431. positioning blind hole, 44. lock nut, 45. jackscrew, 5. barrel connecting assembly, 51. barrel connecting plate, 511. groove A, 512. connecting hole A, 513. connecting hole B, 514. screw rod through hole B, 515. groove B, 52. compression ring, 53. bolt and nut assembly, 54. mounting screw B, 6. guide tube connecting assembly, 61. guide tube connecting plate, 611. sunken hole, 612. connecting hole C, 613. screw rod through hole A, 614. radial groove B, 62. sunken screw, 63. mounting screw A, 7. mounting flap, 71. through hole, 72. mounting long hole. DETAILED DESCRIPTION

[0028] Example one: refer to Figures 1-7The utility model provides a stable output's veterinary injection cylinder includes injection cylinder body 1, through type screw rod motor 2, guide pipe 3, piston assembly, piston assembly penetrates injection cylinder body 1, through type screw rod motor 2, guide pipe 3 in proper order, piston assembly moves axially relative to injection cylinder body 1, through type screw rod motor 2, guide pipe 3, through type screw rod motor 2 provides power for the axial movement of piston assembly, guide pipe 3 provides the direction for the axial movement of piston assembly, the axial movement of piston assembly inside injection cylinder body 1 determines single injection volume, the inside of injection cylinder body 1 is the cavity of same radial section, injection cylinder body 1, through type screw rod motor 2, guide pipe 3 are coaxial in proper order and meet, and injection cylinder body 1 head end is equipped with import and export 11, to supply medicine to go in and out injection cylinder body 1, and piston assembly includes piston head 41, screw rod 42, sliding pin shaft 43 in proper order and meets, and piston head 41 is sealed and is wrapped in the inside of injection cylinder body 1, and tail end is coaxial with the head end of screw rod 42 and meets, and screw rod 42 middle part is coaxial with through type screw rod motor 2 and meets, and sliding pin shaft 43 is radially arranged in the tail end of screw rod 42, and guide pipe 3 is equipped with the sliding slot 31 of the axial sliding cooperation with the end of sliding pin shaft 43, and through type screw rod motor 2 exports fixed displacement angle, and through screw rod 42 acts on piston head 41, makes piston head 41 move axially inside injection cylinder body 1, and the sliding slot 31 is cooperated with sliding pin shaft 43, and the rotation of screw rod 42 is blocked, guarantees the rotation speed of through type screw rod motor 2 to screw rod 42 export times the pitch of screw rod 42 is equal to the axial movement speed of piston head 41, to reach the purpose of accurate dosing, and piston head 41 is coaxial with screw rod 42 and sets up, can guarantee the axial movement of the head end of screw rod 42 can be uniformly acted on piston head 41, increases the stability of the axial movement of piston head 41, and then strengthens the accurate control to the axial movement of piston head 41, and the axial movement of piston head 41 is accurately controlled, and the medicine volume that import and export 11 continuously goes in and out is also more stable.

[0029] Compared with the prior art, the sliding slot 31 of the utility model is cooperated with the sliding pin shaft 43, the rotation of the screw rod 42 is blocked, the rotation speed of the through type screw rod motor 2 to the screw rod 42 export times the pitch of the screw rod 42 is equal to the axial movement speed of the piston head 41, so as to reach the purpose of accurate dosing, the piston head 41 is coaxial with the screw rod 42 and is set up, can guarantee the axial movement of the head end of the screw rod 42 can be uniformly acted on the piston head 41, increases the stability of the axial movement of the piston head 41, and then strengthens the accurate control to the axial movement of the piston head 41, the axial movement of the piston head 41 is accurately controlled, and the medicine volume that the import and export 11 continuously goes in and out is also more stable.

[0030] The through type screw rod motor 2 in the embodiment is a servo motor or a stepping motor, which is conducive to accurately controlling the output displacement angle and accurately controlling the single injection volume of the medicine.

[0031] The piston head 41 side wall is nested with several sealing rings 412 to prevent drug leakage to the inside of the syringe barrel 1 near the lead screw 42. The sealing ring 412 in this embodiment has two evenly distributed along the axial direction of the piston head 41.

[0032] The sliding groove 31 is symmetrically arranged on both sides of the guide tube 3 to ensure that the guide tube 3 provides a more stable guiding effect for the axial movement of the lead screw 42.

[0033] The syringe barrel 1 head end is provided with a tapered cavity 13; the inlet and outlet 11 is arranged on the cavity wall of the tapered cavity 13; the piston head 41 head end is provided with a tapered boss 411 matched with the tapered cavity 13; the tapered boss 411 cooperates with the tapered cavity 13 to ensure that as much drug as possible in the syringe barrel 1 can be discharged from the inlet and outlet 11.

[0034] The guide tube 3 head end is provided with a flange plate 32; the stable output animal syringe further comprises a guide tube connecting assembly 6; the guide tube connecting assembly 6 comprises a guide tube connecting plate 61, a sunken screw 62, and a mounting screw A 63; the guide tube connecting plate 61 is provided with a lead screw through hole A 613 matched with the lead screw 42, a plurality of sunken holes 611, and a plurality of connecting holes C 612; the lead screw through hole A 613 is arranged at the center position of the guide tube connecting plate 61 for the lead screw 42 to pass through; the sunken holes 611 and the connecting holes C 612 are evenly distributed around the lead screw through hole A 613; the sunken screw 62 passes through the sunken hole 611 and is connected with the flange plate 32, thereby detachably connecting the guide tube 3 with the guide tube connecting plate 61; the mounting screw A 63 passes through the connecting hole C 612 and is connected with the tail end of the through-type lead screw motor 2, thereby detachably connecting the through-type lead screw motor 2 with the guide tube connecting plate 61; the guide tube connecting assembly 6 realizes the detachable connection of the guide tube 3 with the through-type lead screw motor 2, facilitating the replacement and maintenance of the guide tube 3 and the through-type lead screw motor 2. The sunken holes 611 in this embodiment have 4, and the connecting holes C 612 have 4.

[0035] The flange plate 32 is provided with a radial groove A 321 matched with the sliding groove 31; the guide tube connecting plate 61 is provided with a radial groove B 614 matched with the radial groove A 321; the sliding pin shaft 43 can be sequentially slid into the radial groove A 321 and the radial groove B 614 along the sliding groove 31, so that the length of the guide tube 3 can be shortened, and the structure of the entire stable output animal syringe is more compact.

[0036] The lead screw 42 head end is threadedly connected with the piston head 41 tail end, thereby realizing the detachable connection of the lead screw 42 with the piston head 41; the piston assembly further comprises a lock nut 44; the lock nut 44 is threadedly connected with the lead screw 42 head end; the end of the lock nut 44 abuts against the tail end of the piston head 41; the lock nut 44 can prevent the threaded connection between the piston head 41 and the lead screw 42 head end from loosening.

[0037] The tail end of the lead screw 42 is provided with a radial hole 422 matched with the sliding pin shaft 43; the sliding pin shaft 43 is inserted into the radial hole 422; the sliding pin shaft 43 is detachably connected with the lead screw 42.

[0038] The tail end face of the lead screw 42 is provided with a fastening screw hole 421; the piston assembly further comprises a jackscrew 45; the jackscrew 45 is threadedly matched with the fastening screw hole 421; the jackscrew 45 abuts against the side face of the sliding pin shaft 43; the jackscrew 45 can lock the sliding pin shaft 43 to prevent the sliding pin shaft 43 from sliding relative to the radial hole 422.

[0039] The sliding pin shaft 43 is provided with a positioning blind hole 431 matched with the fastening screw hole 421; the end of the jackscrew 45 abuts against the bottom of the positioning blind hole 431, effectively limiting the sliding pin shaft 43 to avoid the sliding pin shaft 43 from being pulled out of the radial hole 422.

[0040] The tail end of the injection barrel 1 is provided with an outwardly extending convex edge 12; the stable output animal injection barrel further comprises a barrel connecting assembly 5; the barrel connecting assembly 5 comprises a barrel connecting plate 51, a compression ring 52, a bolt and nut assembly 53, and a mounting screw B 54; the head end face of the barrel connecting plate 51 is provided with a groove A 511 matched with the convex edge 12, a connecting hole A 512, a connecting hole B 513, and a lead screw through hole B 514 matched with the middle part of the lead screw 42; the lead screw through hole B 514 can pass through the lead screw 42; the compression ring 52 is sleeved on the lower end of the injection barrel 1 and abuts against the convex edge 12; the compression ring 52 can press the convex edge 12 to realize the closed connection of the tail end of the injection barrel 1 and the barrel connecting plate 51; the convex edge 12 is embedded in the groove A 511; the bolt and nut assembly 53 connects the compression ring 52 and the barrel connecting plate 51 through the connecting hole A 512 to realize the detachable connection of the injection barrel 1 and the barrel connecting plate 51; the mounting screw B 54 is threadedly connected with the connecting hole B 513 through the head end of the through-type lead screw motor 2 to realize the detachable connection of the through-type lead screw motor 2 and the barrel connecting plate 51; the barrel connecting assembly 5 realizes the detachable connection of the through-type lead screw motor 2 and the injection barrel 1, facilitating the replacement and maintenance of the through-type lead screw motor 2 and the injection barrel 1.

[0041] The groove A 511 covers part of the area of the connecting hole A 512, so that the convex edge 12 can extend outward as much as possible, increase the contact area of the compression ring 52 and the convex edge 12, and improve the connection stability of the injection barrel 1 and the barrel connecting plate 51.

[0042] The working process of the embodiment comprises the following steps:

[0043] ① Injecting liquid medicine into the injection barrel 1

[0044] The needle tube is installed on the inlet and outlet 11; the through-type lead screw motor 2 outputs positive torque, which acts on the lead screw 42 to drive the piston head 41 to move towards the head end of the injection cylinder 1; the displacement angle output by the through-type lead screw motor 2 is quantified each time; the displacement angle and angular velocity output by the through-type lead screw motor 2 can be set; after the liquid medicine is discharged from the end of the needle tube, the excess air in the injection cylinder 1 is completely discharged;

[0045] ②Discharge excess air in the injection cylinder 1

[0046] The needle tube is installed on the inlet and outlet 11; the through-type lead screw motor 2 outputs positive torque, which acts on the lead screw 42 to drive the piston head 41 to move towards the head end of the injection cylinder 1; the displacement angle output by the through-type lead screw motor 2 is quantified each time; the displacement angle and angular velocity output by the through-type lead screw motor 2 can be set; after the liquid medicine is discharged from the end of the needle tube, the excess air in the injection cylinder 1 is completely discharged;

[0047] ③Single injection

[0048] The needle tube is inserted into the animal body; the through-type lead screw motor 2 outputs a quantified displacement angle to drive the piston head 41 to move a fixed distance towards the head end of the injection cylinder 1; because the inside of the injection cylinder 1 is a cavity with the same radial cross-section, the liquid medicine discharged from the inlet and outlet 11 has a fixed volume;

[0049] ④Continuous injection

[0050] Pull out the needle tube; repeat step ③ until the piston head 41 moves to the limit position of the stroke.

[0051] In step ③, the feed amount of the piston head 41 is the same each time, and the volume of the injected liquid medicine is the same, which can well ensure the stability of the single injection amount.

[0052] Example two: example two is basically the same as example one, and the same parts will not be repeated. The difference is that the through-type lead screw motor 2 is provided with a protruding part 21; the tail end surface of the cylinder connecting plate 51 is provided with a groove B 515 corresponding to the protruding part 21; the groove B 515 is buckled on the protruding part 21, so that the connection between the cylinder connecting plate 51 and the through-type lead screw motor 2 is more stable, and the connection structure is more compact.

[0053] The stable output animal injector further comprises a mounting flap 7; one side of the mounting flap 7 is provided with a through hole 71 corresponding to the flange plate 32, and the other side is uniformly provided with a mounting long hole 72; the flange plate 32 is nested in the through hole 71; the mounting screw A 63 also penetrates one side of the mounting flap 7; the guide tube connecting plate 61 is connected to the outside through the mounting flap 7; the mounting long hole 72 can compensate for the installation error.

Claims

1. A stable output veterinary syringe, characterized by, The injection cylinder body, the through type screw motor, the guide tube and the piston assembly are coaxially connected in sequence.

2. The stable output veterinary syringe of claim 1, wherein: The piston head is provided with a plurality of sealing rings.

3. The stable output veterinary syringe of claim 1, wherein: The injection cylinder body is provided with a tapered cavity at the head end.

4. The stable output veterinary syringe of claim 1, wherein: The guide tube is provided with a flange at the head end.

5. The stable output veterinary syringe of claim 4, wherein: The flange is provided with a radial groove matched with the sliding slot.

6. The stable output animal syringe of claim 1 or 5, wherein: The piston assembly is further provided with a lock nut.

7. The stable output veterinary syringe of claim 6, wherein: The piston assembly is further provided with a top screw.

8. The stable output veterinary syringe of claim 7, wherein: The injection cylinder body is provided with an outwardly extending convex edge at the tail end.

9. The stable output animal syringe of claim 1 or 7, wherein: The cylinder body connecting assembly comprises a cylinder body connecting plate, a compression ring, a bolt and nut assembly, and a mounting screw B.

10. The stable output veterinary syringe of claim 9, wherein: The groove A covers part of the connecting hole A.

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