阅读说明：本技术 一种自动控制注射深度的药品注射装置 (Medicine injection device capable of automatically controlling injection depth ) 是由 许吉 于 2020-12-03 设计创作，主要内容包括：本发明公开了一种自动控制注射深度的药品注射装置,包括箱体,所述箱体内部设有安置空间,所述安置空间内部设有固定机构,所述固定机构包括固定连接在所述安置空间上侧内壁的固定箱,所述固定箱内部设有固定腔,所述固定腔左侧内壁固定连接有第一电机,所述第一电机右端面转动连接有第一丝杆,所述第一丝杆螺纹连接有第一滑块,所述第一滑块右端面固定连接有第一滑板,本发明通过固定机构将猪固定,在固定的同时对猪进行称重,根据猪的不同体型,来自动调整注射机构与猪之间的距离,从而获得不同的药品注射深度,使药品被注射到合适的位置,并且可以自动对注射完毕后的针头进行更换,在节约时间和人力的同时,获得更好的注射效果。(The invention discloses a medicine injection device capable of automatically controlling injection depth, which comprises a box body, wherein an accommodating space is arranged in the box body, a fixing mechanism is arranged in the accommodating space, the fixing mechanism comprises a fixing box fixedly connected with the inner wall of the upper side of the accommodating space, a fixing cavity is arranged in the fixing box, the inner wall of the left side of the fixing cavity is fixedly connected with a first motor, the right end face of the first motor is rotatably connected with a first lead screw, the first lead screw is in threaded connection with a first slide block, and the right end face of the first slide block is fixedly connected with a first sliding plate. The injection device saves time and labor, and obtains better injection effect.)

1. The utility model provides an automatic medicine injection device of control injection depth, includes the box, its characterized in that: the box body is internally provided with an accommodating space, the accommodating space is internally provided with a fixing mechanism, the fixing mechanism comprises a fixing box fixedly connected with the inner wall of the upper side of the accommodating space, the fixing box is internally provided with a fixing cavity, the inner wall of the left side of the fixing cavity is fixedly connected with a first motor, the right end face of the first motor is rotatably connected with a first lead screw, the first lead screw is in threaded connection with a first slide block, the right end face of the first slide block is fixedly connected with a first slide plate, the first slide plate is in sliding connection with the fixing cavity, the right end face of the first slide plate is fixedly connected with a first clamping block, the right side of the first clamping block is provided with two second clamping blocks fixedly connected with the inner wall of the right side of the fixing cavity, an injection hole is arranged between the two second clamping blocks, the inner wall of the lower side of the fixing cavity is fixedly connected with two first springs, the second sliding plate is connected with the fixed cavity in a sliding manner, and the lower end face of the second sliding plate is fixedly connected with a first toothed block;

the right side of the fixing mechanism is provided with an injection mechanism, the injection mechanism comprises a first limiting block fixedly connected with the inner wall of the rear side of the accommodating space, a first limiting cavity is arranged in the first limiting block, the inner wall of the right side of the first limiting cavity is fixedly connected with two second springs on the inner wall of the right side of the first limiting cavity, the other ends of the two second springs are fixedly connected with a third sliding plate, the lower end surface of the third sliding plate is fixedly connected with a second toothed block, the left end surface of the third sliding plate is fixedly connected with a second limiting block, a second limiting cavity is arranged in the second limiting block, the inner wall of the right side of the second limiting cavity is fixedly connected with a second motor, the left end surface of the second motor is rotatably connected with a second lead screw, the left end surface of the second lead screw is fixedly connected with a pressure sensor, the second lead screw is in threaded connection with a second sliding block, and the second sliding block is in, the left end face of the second sliding block is fixedly connected with an injection tube;

the left side of the injection mechanism is provided with a needle changing mechanism, the needle changing mechanism comprises a needle storage box fixedly connected with the inner wall of the upper side of the arrangement space, a switch is fixedly connected onto the needle storage box, the lower side of the switch is provided with a third motor fixedly connected with the right end face of the fixed box, the right end face of the third motor is rotatably connected with a driving shaft, an intermediate wheel is fixedly connected onto the driving shaft, the upper end face of the intermediate wheel is fixedly connected with a third limiting block, a third limiting cavity is arranged inside the third limiting block, the inner wall of the lower side of the third limiting cavity is fixedly connected with a fourth motor, the upper end face of the fourth motor is rotatably connected with a third lead screw, the third lead screw is in threaded connection with a third slide block, the third slide block is in sliding connection with the third limiting cavity, the upper end face of the third slide block is fixedly connected with a fourth limiting block, and a fourth limiting cavity is, the inner wall of the lower side of the fourth limiting cavity is fixedly connected with a first electromagnet, two third springs which are symmetrically distributed are fixedly connected to the front end face and the rear end face of the first electromagnet, and the other end of each third spring is fixedly connected with a third clamping block.

2. An automatic injection depth control drug injection apparatus as defined in claim 1, further comprising: the fixing mechanism further comprises a rotating shaft which is rotatably connected to the inner wall of the rear side of the fixing cavity, a first gear is fixedly connected to the rotating shaft and is meshed with the first toothed block, a poking wheel fixedly connected to the rotating shaft is arranged on the front side of the first gear, a sliding shaft is fixedly connected to the front end face of the poking wheel, a fifth limiting block fixedly connected to the right end face of the fixing box is arranged on the right side of the rotating shaft, a fifth limiting cavity is arranged inside the fifth limiting block, a fourth sliding block slidably connected with the fifth limiting cavity is arranged inside the fifth limiting cavity, a sixth limiting block is fixedly connected to the left end face of the fourth sliding block, a sliding groove is arranged inside the sixth limiting block, the sliding shaft is slidably connected with the sliding groove, a third toothed block is fixedly connected to the upper end face of the fourth sliding block, and a fixing shaft fixedly connected to the inner wall of the rear side of the accommodating space is arranged on the upper side of the fifth, and a second gear is fixedly connected to the fixed shaft, and the second gear is meshed with the third toothed block and the second toothed block.

3. An automatic injection depth control drug injection apparatus as defined in claim 1, further comprising: the injection mechanism further comprises a seventh limiting block fixedly connected to the inner wall of the rear side of the arrangement space, a sixth limiting cavity is arranged inside the seventh limiting block, a fifth motor is fixedly connected to the inner wall of the right side of the sixth limiting cavity, the left end face of the fifth motor is rotatably connected with a fourth lead screw, the fourth lead screw is in threaded connection with a fourth slider, the left end face of the fourth slider is fixedly connected with a fourth sliding plate, the fourth sliding plate is in sliding connection with the sixth limiting cavity, the left end face of the seventh limiting block is fixedly connected with a first one-way valve, the left end face of the first one-way valve is fixedly connected with a medicine conveying pipe, the other end of the medicine conveying pipe is connected to the injection pipe, the inner wall of the rear side of the arrangement space is fixedly connected with a medicine storage box, a medicine storage cavity is arranged inside the medicine storage box, an intermediate pipe is fixedly connected to the inner wall of the lower side of the medicine storage cavity, and the middle pipe is fixedly connected with a second one-way valve.

4. An automatic injection depth control drug injection apparatus as defined in claim 1, further comprising: the needle changing mechanism further comprises a recycling box fixedly connected to the upper end face of the third sliding plate, a recycling cavity is arranged inside the recycling box, an eighth limiting block is fixedly connected to the inner wall of the right side of the recycling cavity, a seventh limiting cavity is arranged inside the eighth limiting block, a second electromagnet is fixedly connected to the inner wall of the lower side of the seventh limiting cavity, a fourth spring is fixedly connected to the upper end face of the second electromagnet, the other end of the fourth spring is fixedly connected with a needle releasing block, and the needle releasing block is in sliding connection with the seventh limiting cavity.

Technical Field

The invention relates to the field related to medicine injection, in particular to a medicine injection device capable of automatically controlling injection depth.

Background

With the continuous development of social economy, the living standard and the consumption standard of people are continuously improved, the demand of pork is continuously increased, and the specialization and large-scale breeding industry of pigs in China is promoted to be rapidly developed. Because of the requirement on epidemic prevention, the injection of vaccines is needed to be carried out on pigs, the existing equipment generally fixes the pigs and then directly injects the fixed pigs, and the fact that the injection depth needs to be changed along with the change of the body type of each pig is not considered, so that the injection effect is not ideal.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a medicine injection device capable of automatically controlling the injection depth, and the above situation is overcome.

The invention is realized by the following technical scheme.

The invention relates to a medicine injection device capable of automatically controlling injection depth, which comprises a box body, wherein an accommodating space is arranged in the box body, a fixing mechanism is arranged in the accommodating space, the fixing mechanism comprises a fixing box fixedly connected to the inner wall of the upper side of the accommodating space, a fixing cavity is arranged in the fixing box, the inner wall of the left side of the fixing cavity is fixedly connected with a first motor, the right end surface of the first motor is rotatably connected with a first lead screw, the first lead screw is in threaded connection with a first slide block, the right end surface of the first slide block is fixedly connected with a first slide plate, the first slide plate is in sliding connection with the fixing cavity, the right end surface of the first slide plate is fixedly connected with a first clamping block, the right side of the first clamping block is provided with two second clamping blocks fixedly connected to the inner wall of the right side of the fixing cavity, an injection hole is, the inner wall of the lower side of the fixed cavity is fixedly connected with two first springs, the other ends of the two first springs are fixedly connected with a second sliding plate, the second sliding plate is connected with the fixed cavity in a sliding manner, and the lower end face of the second sliding plate is fixedly connected with a first toothed block;

the right side of the fixing mechanism is provided with an injection mechanism, the injection mechanism comprises a first limiting block fixedly connected with the inner wall of the rear side of the accommodating space, a first limiting cavity is arranged in the first limiting block, the inner wall of the right side of the first limiting cavity is fixedly connected with two second springs on the inner wall of the right side of the first limiting cavity, the other ends of the two second springs are fixedly connected with a third sliding plate, the lower end surface of the third sliding plate is fixedly connected with a second toothed block, the left end surface of the third sliding plate is fixedly connected with a second limiting block, a second limiting cavity is arranged in the second limiting block, the inner wall of the right side of the second limiting cavity is fixedly connected with a second motor, the left end surface of the second motor is rotatably connected with a second lead screw, the left end surface of the second lead screw is fixedly connected with a pressure sensor, the second lead screw is in threaded connection with a second sliding block, and the second sliding block is in, the left end face of the second sliding block is fixedly connected with an injection tube;

the left side of the injection mechanism is provided with a needle changing mechanism, the needle changing mechanism comprises a needle storage box fixedly connected with the inner wall of the upper side of the arrangement space, a switch is fixedly connected onto the needle storage box, the lower side of the switch is provided with a third motor fixedly connected with the right end face of the fixed box, the right end face of the third motor is rotatably connected with a driving shaft, an intermediate wheel is fixedly connected onto the driving shaft, the upper end face of the intermediate wheel is fixedly connected with a third limiting block, a third limiting cavity is arranged inside the third limiting block, the inner wall of the lower side of the third limiting cavity is fixedly connected with a fourth motor, the upper end face of the fourth motor is rotatably connected with a third lead screw, the third lead screw is in threaded connection with a third slide block, the third slide block is in sliding connection with the third limiting cavity, the upper end face of the third slide block is fixedly connected with a fourth limiting block, and a fourth limiting cavity is, the inner wall of the lower side of the fourth limiting cavity is fixedly connected with a first electromagnet, two third springs which are symmetrically distributed are fixedly connected to the front end face and the rear end face of the first electromagnet, and the other end of each third spring is fixedly connected with a third clamping block.

Preferably, the fixing mechanism further comprises a rotating shaft rotatably connected to the inner wall of the rear side of the fixing cavity, a first gear is fixedly connected to the rotating shaft, the first gear is engaged with the first toothed block, a toggle wheel fixedly connected to the rotating shaft is arranged on the front side of the first gear, a sliding shaft is fixedly connected to the front end face of the toggle wheel, a fifth limiting block fixedly connected to the right end face of the fixing box is arranged on the right side of the rotating shaft, a fifth limiting cavity is arranged inside the fifth limiting block, a fourth sliding block slidably connected to the fifth limiting cavity is arranged inside the fifth limiting cavity, a sixth limiting block is fixedly connected to the left end face of the fourth sliding block, a sliding groove is arranged inside the sixth limiting block, the sliding shaft is slidably connected to the sliding groove, a third toothed block is fixedly connected to the upper end face of the fourth sliding block, and a fixing shaft fixedly connected to the inner wall of the rear side of the accommodating space is arranged on the upper side of the fifth limiting cavity, and a second gear is fixedly connected to the fixed shaft, and the second gear is meshed with the third toothed block and the second toothed block.

Preferably, the injection mechanism further comprises a seventh limiting block fixedly connected to the inner wall of the rear side of the accommodating space, a sixth limiting cavity is arranged inside the seventh limiting block, the inner wall of the right side of the sixth limiting cavity is fixedly connected with a fifth motor, the left end face of the fifth motor is rotatably connected with a fourth lead screw, the fourth lead screw is in threaded connection with a fourth slider, the left end face of the fourth slider is fixedly connected with a fourth sliding plate, the fourth sliding plate is in sliding connection with the sixth limiting cavity, the left end face of the seventh limiting block is fixedly connected with a first one-way valve, the left end face of the first one-way valve is fixedly connected with a medicine conveying pipe, the other end of the medicine conveying pipe is connected to the injection pipe, the inner wall of the rear side of the accommodating space is fixedly connected with a medicine storage box, a medicine storage cavity is arranged inside the medicine storage box, the inner wall of the lower side of the medicine storage cavity is fixedly connected with a middle pipe, and, and the middle pipe is fixedly connected with a second one-way valve.

Preferably, the needle changing mechanism further comprises a recycling bin fixedly connected to the upper end face of the third sliding plate, a recycling cavity is arranged inside the recycling bin, an eighth limiting block is fixedly connected to the inner wall of the right side of the recycling cavity, a seventh limiting cavity is arranged inside the eighth limiting block, a second electromagnet is fixedly connected to the inner wall of the lower side of the seventh limiting cavity, a fourth spring is fixedly connected to the upper end face of the second electromagnet, the other end of the fourth spring is fixedly connected with a needle releasing block, and the needle releasing block is slidably connected with the seventh limiting cavity.

The invention has the beneficial effects that: according to the invention, the pig is fixed through the fixing mechanism, the pig is weighed while being fixed, and the distance between the injection mechanism and the pig is automatically adjusted according to different body types of the pig, so that different medicine injection depths are obtained, the medicine is injected to a proper position, the needle head after injection is automatically replaced, and a better injection effect is obtained while time and labor are saved.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic view of the embodiment of the present invention in the direction of A-A in FIG. 1;

FIG. 3 is a schematic view of the embodiment of the present invention in the direction B-B in FIG. 1;

FIG. 4 is an enlarged schematic view of the embodiment of the present invention at C in FIG. 1;

FIG. 5 is a schematic view of the embodiment of the present invention in the direction D-D in FIG. 1;

FIG. 6 is a schematic view of the E-E direction in FIG. 4 according to an embodiment of the present invention.

Detailed Description

The invention will now be described in detail with reference to fig. 1-6, wherein for ease of description the orientations described hereinafter are now defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

Referring to fig. 1-6, the medicine injection device for automatically controlling injection depth comprises a box body 10, a placement space 11 is arranged inside the box body 10, a fixing mechanism 90 is arranged inside the placement space 11, the fixing mechanism 90 comprises a fixing box 41 fixedly connected to the inner wall of the upper side of the placement space 11, a fixing cavity 42 is arranged inside the fixing box 41, the inner wall of the left side of the fixing cavity 42 is fixedly connected with a first motor 43, the right end face of the first motor 43 is rotatably connected with a first lead screw 44, the first lead screw 44 is in threaded connection with a first slider 45, the right end face of the first slider 45 is fixedly connected with a first sliding plate 47, the first sliding plate 47 is in sliding connection with the fixing cavity 42, the right end face of the first sliding plate 47 is fixedly connected with a first clamping block 48, the right side of the first clamping block 48 is provided with two second clamping blocks 49 fixedly connected to the inner wall of the right side of the fixing cavity 42, an injection hole 50 is formed between the two second clamping blocks 49, two first springs 52 are fixedly connected to the inner wall of the lower side of the fixed cavity 42, a second sliding plate 51 is fixedly connected to the other end of each of the two first springs 52, the second sliding plate 51 is slidably connected with the fixed cavity 42, a first toothed block 75 is fixedly connected to the lower end face of the second sliding plate 51, the first motor 43 is started to drive the first screw rod 44 to rotate, the first screw rod 44 drives the first sliding block 45 to move, and the first sliding block 45 drives the first sliding plate 47 to move;

the right side of the fixing mechanism 90 is provided with an injection mechanism 91, the injection mechanism 91 comprises a first limiting block 24 fixedly connected to the inner wall of the rear side of the accommodating space 11, a first limiting cavity 25 is arranged inside the first limiting block 24, the inner wall of the right side of the first limiting cavity 25 is fixedly connected to two second springs 26 of the inner wall of the right side of the first limiting cavity 25, the other ends of the two second springs 26 are fixedly connected with a third sliding plate 27, the lower end surface of the third sliding plate 27 is fixedly connected with a second toothed block 34, the left end surface of the third sliding plate 27 is fixedly connected with a second limiting block 28, the inside of the second limiting block 28 is provided with a second limiting cavity 29, the inner wall of the right side of the second limiting cavity 29 is fixedly connected with a second motor 32, the left end surface of the second motor 32 is rotatably connected with a second screw rod 33, the left end surface of the second screw rod 33 is fixedly connected with a, the second screw 33 is in threaded connection with a second sliding block 30, the second sliding block 30 is in sliding connection with the second limiting cavity 29, the left end face of the second sliding block 30 is fixedly connected with an injection tube 31, the second motor 32 is started to drive the second screw 33 to rotate, the second screw 33 drives the second sliding block 30 to move, and the second sliding block 30 drives the injection tube 31 to move;

the left side of the injection mechanism 91 is provided with a needle changing mechanism 92, the needle changing mechanism 92 comprises a needle storage box 53 fixedly connected to the inner wall of the upper side of the arrangement space 11, the needle storage box 53 is fixedly connected with a switch 46, the lower side of the switch 46 is provided with a third motor 59 fixedly connected to the right end face of the fixed box 41, the right end face of the third motor 59 is rotatably connected with a driving shaft 58, the driving shaft 58 is fixedly connected with an intermediate wheel 57, the upper end face of the intermediate wheel 57 is fixedly connected with a third limiting block 56, a third limiting cavity 65 is arranged inside the third limiting block 56, the inner wall of the lower side of the third limiting cavity 65 is fixedly connected with a fourth motor 66, the upper end face of the fourth motor 66 is rotatably connected with a third screw rod 64, the third screw rod 64 is in threaded connection with a third slide block 63, and the third slide block 63 is in sliding connection with the third limiting cavity, a fourth limiting block 55 is fixedly connected to the upper end face of the third sliding block 63, a fourth limiting cavity 60 is arranged inside the fourth limiting block 55, a first electromagnet 61 is fixedly connected to the inner wall of the lower side of the fourth limiting cavity 60, two third springs 62 which are symmetrically distributed are fixedly connected to the front end face and the rear end face of the first electromagnet 61, a third clamping block 54 is fixedly connected to the other end of the third spring 62, the third motor 59 is started to drive the driving shaft 58 to rotate, the driving shaft 58 drives the intermediate wheel 57 to rotate, the intermediate wheel 57 drives the third limiting block 56 to rotate, the third limiting block 56 drives the fourth motor 66 to rotate, the fourth motor 66 drives the third screw rod 64 to rotate, the third screw rod 64 drives the third sliding block 63 to move, and the third sliding block 63 drives the fourth limiting block 55 to move.

Advantageously, the fixing mechanism 90 further comprises a rotating shaft 80 rotatably connected to the inner wall of the rear side of the fixing cavity 42, a first gear 81 is fixedly connected to the rotating shaft 80, the first gear 81 is engaged with the first toothed block 75, a dial wheel 76 fixedly connected to the rotating shaft 80 is arranged on the front side of the first gear 81, a sliding shaft 78 is fixedly connected to the front end surface of the dial wheel 76, a fifth limiting block 39 fixedly connected to the right end surface of the fixing box 41 is arranged on the right side of the rotating shaft 80, a fifth limiting cavity 40 is arranged inside the fifth limiting block 39, a fourth sliding block 38 slidably connected to the fifth limiting cavity 40 is arranged inside the fifth limiting cavity 40, a sixth limiting block 77 is fixedly connected to the left end surface of the fourth sliding block 38, a sliding groove 79 is arranged inside the sixth limiting block 77, and the sliding shaft 78 is slidably connected to the sliding groove 79, a third toothed block 37 is fixedly connected to an upper end surface of the fourth slider 38, a fixed shaft 36 fixedly connected to a rear inner wall of the accommodating space 11 is disposed on an upper side of the fifth limiting cavity 40, a second gear 35 is fixedly connected to the fixed shaft 36, and the second gear 35 is engaged with the third toothed block 37 and the second toothed block 34.

Advantageously, the injection mechanism 91 further comprises a seventh limiting block 16 fixedly connected to the inner wall of the rear side of the installation space 11, a sixth limiting cavity 17 is arranged inside the seventh limiting block 16, a fifth motor 21 is fixedly connected to the inner wall of the right side of the sixth limiting cavity 17, a fourth screw rod 20 is rotatably connected to the left end surface of the fifth motor 21, a fourth slider 19 is threadedly connected to the fourth screw rod 20, a fourth sliding plate 18 is fixedly connected to the left end surface of the fourth slider 19, the fourth sliding plate 18 is slidably connected to the sixth limiting cavity 17, a first one-way valve 22 is fixedly connected to the left end surface of the seventh limiting block 16, a medicine conveying pipe 23 is fixedly connected to the left end surface of the first one-way valve 22, the other end of the medicine conveying pipe 23 is connected to the injection pipe 31, a medicine storage box 12 is fixedly connected to the inner wall of the rear side of the installation space 11, a medicine storage cavity 13 is arranged inside the medicine storage box 12, the inner wall of the lower side of the medicine storage cavity 13 is fixedly connected with a middle pipe 14, the other end of the middle pipe 14 is connected to the inner wall of the upper side of a sixth limiting cavity 17, and a second one-way valve 15 is fixedly connected to the middle pipe 14.

Advantageously, the needle changing mechanism 92 further comprises a recycling box 67 fixedly connected to the upper end surface of the third sliding plate 27, a recycling cavity 68 is arranged inside the recycling box 67, an eighth limiting block 69 is fixedly connected to the inner wall of the right side of the recycling cavity 68, a seventh limiting cavity 71 is arranged inside the eighth limiting block 69, a second electromagnet 73 is fixedly connected to the inner wall of the lower side of the seventh limiting cavity 71, a fourth spring 72 is fixedly connected to the upper end surface of the second electromagnet 73, the other end of the fourth spring 72 is fixedly connected to a needle releasing block 70, and the needle releasing block 70 is slidably connected to the seventh limiting cavity 71.

In the initial state, the first spring 52, the second spring 26, and the third spring 62 are in the normal state, and the fourth spring 72 is in the compressed state.

When the pig starts to work, the pig is driven into the fixed cavity 42, the first motor 43 is started to drive the first screw rod 44 to rotate, the first screw rod 44 drives the first slide block 45 to move, the first slide block 45 drives the first slide plate 47 to move, the first slide plate 47 drives the first clamping block 48 to move, the pig is fixed, the pig stands on the second slide plate 51, the second slide plate 51 moves downwards, the second slide plate 51 drives the first toothed block 75 to move downwards, the first toothed block 75 drives the first gear 81 to rotate, the first gear 81 drives the rotating shaft 80 to rotate, the rotating shaft 80 drives the poking wheel 76 to rotate, the poking wheel 76 drives the sliding shaft 78 to rotate, the sliding shaft 78 drives the sixth limiting block 77 to move through the sliding chute 79, the sixth limiting block 77 drives the fourth slide block 38 to move, the fourth slide block 38 drives the third toothed block 37 to move, the third toothed block 37 drives the second gear 35 to rotate, the second gear 35 drives the second toothed block 34 to move, the second dentate block 34 drives the third sliding plate 27 to move, the third sliding plate 27 drives the second limiting block 28 to move, the second limiting block 28 drives the second motor 32 to move, the second motor 32 is started to drive the second lead screw 33 to rotate, the second lead screw 33 drives the second sliding block 30 to move, the second sliding block 30 drives the injection tube 31 to move, the switch 46 is opened, the needle falls down and falls to the middle of the third clamping block 54, the first electromagnet 61 is electrified to attract the third clamping block 54, the third clamping block 54 clamps the needle, the third motor 59 is started to drive the driving shaft 58 to rotate, the driving shaft 58 drives the middle wheel 57 to rotate, the middle wheel 57 drives the third limiting block 56 to rotate, the third limiting block 56 drives the fourth motor 66 to rotate, the fourth motor 66 is started to drive the third lead screw 64 to drive the third sliding block 63 to move, the third sliding block 63 drives the fourth limiting block 55 to move, the fourth limiting block 55 drives the third clamping block 54 to move, the third clamping block 54 sleeves the needle head on the injection tube 31, the second one-way valve 15 is opened, the medicine flows into the sixth limiting cavity 17, the second one-way valve 15 is closed, the first one-way valve 22 is opened, the fifth motor 21 is started to drive the fourth screw rod 20 to rotate, the fourth screw rod 20 drives the fourth slide block 19 to move, the fourth slide block 19 drives the fourth slide plate 18 to move, and injection is started for the pig, the pig has a larger body shape, a heavier pig and a thicker skin, the more the second slide plate 51 descends, the deeper the injection depth is, after the injection is completed, the second motor 32 rotates reversely to drive the injection tube 31 to retract, the second slide block 30 extrudes the pressure sensor 74, the second electromagnet 73 is powered off, the fourth spring 72 is reset, the needle removing block 70 moves upwards, and the used needle head is removed.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.