CN111822120A - Automatic grind mill of screening - Google Patents

Abstract

The invention discloses a mill capable of automatically grinding and screening, which comprises a box body, wherein three grinding cavities are arranged in the box body, three storage cavities with upward openings and communicated with the grinding cavities are arranged in the upper inner wall of each grinding cavity, clamping grooves with rightward openings are arranged in the left inner wall of each storage cavity, a moving cavity with leftward openings is arranged in the lower inner wall of each storage cavity, and a baffle with a left end positioned in each clamping groove is connected in the moving cavity in a sliding manner.

Description

Automatic grind mill of screening

Technical Field

The invention relates to the field of traditional Chinese medicines, in particular to a mill capable of automatically grinding and screening.

Background

Iron drug grinding is one of the traditional medicine grinding tools in China, and is used for grinding medicinal materials into fine powder so as to further prepare patent drugs such as pills, powder, ointment, pills and the like. Iron medicine grinds is suitable for to mill kibbling medicine kind more, labour saving and time saving again, but ordinary iron medicine grinds when processing the medicinal material, needs manual operation, though compare in other medicine instrument of grinding more laborsaving, but still consume physical power and longer time, and efficiency is lower to can't guarantee to the medicinal material particle size after grinding, often have some large granules not grind up to standard medicinal material and exist, can exert an influence to the drug effect.

Disclosure of Invention

The invention aims to provide a mill capable of automatically grinding and screening, and overcomes the problems of insufficient grinding of medicinal materials, low efficiency and the like.

The invention is realized by the following technical scheme.

The invention relates to a grinding mill capable of automatically grinding and screening, which comprises a box body, wherein three grinding cavities are arranged in the box body, three storage cavities with upward openings and communicated with the grinding cavities are arranged in the upper inner wall of each grinding cavity, clamping grooves with rightward openings are arranged in the left inner wall of each storage cavity, a moving cavity with leftward openings is arranged in the lower inner wall of each storage cavity, a baffle plate with a left end positioned in each clamping groove is connected in the moving cavity in a sliding mode, a moving spring is fixedly connected at the right end of each baffle plate, the right end of each moving spring is fixedly connected with the right inner wall of each moving cavity, a sliding cavity communicated with the grinding cavities is arranged in the lower inner wall of each grinding cavity, a sliding plate is connected in the sliding cavity in a sliding mode, a sliding spring is fixedly connected at the right end of each sliding plate, the right end of each sliding spring is, the switching mechanism comprises a translation cavity positioned in the box body, a moving block is connected in the translation cavity in a sliding manner, a rotating cavity with a downward opening and a leftward opening is arranged in the moving block, a rotating motor is fixedly connected to the right inner wall of the rotating cavity, a rotating shaft is connected to the rotating motor in a power manner, three grinding discs respectively positioned in the three grinding cavities are fixedly connected to the rotating shaft, a gear positioned in the rotating cavity is connected to a key on the rotating shaft, an annular groove is formed in the gear, two racks are fixedly connected to the lower inner wall of the rotating cavity, reset cavities communicated with the translation cavity are formed in the upper inner wall and the lower inner wall of the translation cavity, a reset block is connected in the reset cavity in a sliding manner, a clamping groove with a rightward opening is formed in the reset block, a reset spring is fixedly connected to one end, away from the translation cavity, of the reset, the medical grinding device is characterized in that a communicating cavity is formed in the right inner wall of the reset cavity, a driving cavity is formed in the reset cavity, the left end of the driving cavity is located in a driving rod in the clamping groove, a screening mechanism used for screening ground medicinal materials is arranged below the grinding cavity, a transmission mechanism used for controlling the baffle and the sliding plate to open and close is arranged behind the screening mechanism, and a switching mechanism used for controlling the front and back movement of the grinding mechanism is arranged on the front and back inner walls of the grinding cavity.

Further, screening mechanism is including being located grind three discharge gate in the inner wall under the chamber, be equipped with the intercommunication in the discharge gate upper inner wall the screening chamber of discharge gate, screening intracavity sliding connection has three screening container, be equipped with the feed inlet on the screening container, screening container front end fixedly connected with pressure spring, the pressure spring front end with the preceding inner wall fixed connection in screening chamber, it is three through connecting rod fixed connection between the screening container, be equipped with the three reservoir who is used for storing grinding screening completion medicinal material under the discharge gate on the inner wall.

Further, the transmission mechanism comprises a transmission cavity which is positioned in the rear inner wall of the screening cavity and has a forward opening, a pneumatic spring is fixedly connected to the right inner wall of the transmission cavity, a transmission shaft is connected to the pneumatic spring in a power manner, a cam and a lead screw are fixedly connected to the transmission shaft, a nut is rotatably connected to the lead screw, pushing cavities communicated with the transmission cavity are respectively arranged on the front inner wall and the rear inner wall of the transmission cavity, a pushing block is connected in the pushing cavities in a sliding manner, an extension spring is fixedly connected to one end of the pushing block, which is far away from the transmission cavity, the other end of the extension spring is fixedly connected to the inner wall of the pushing cavity, which is far away from the transmission cavity, a long line is fixedly connected to the pushing block on the front side, penetrates through the inner wall of the pushing cavity on the front side and the right inner wall of the, the pull rope penetrates through the inner wall of the pushing cavity and the right inner wall of the moving cavity at the rear side and is fixedly connected with the right end of the baffle.

Further, the switching mechanism comprises two compression cavities which are positioned in the front inner wall and the rear inner wall of the grinding cavity and are communicated with the grinding cavity, a compression block is connected in the compression cavities in a sliding manner, a positioning cavity with an upward opening is arranged on the compression block, a limiting cavity with a downward opening is arranged in the upper inner wall of the compression cavity, a limiting block is connected in the limiting cavity in a sliding manner, a limiting spring is fixedly connected to the upper end of the limiting block, the upper end of the limiting spring is fixedly connected with the upper inner wall of the limiting cavity, a string is fixedly connected to the upper end of the limiting block, the two strings penetrate through the upper inner wall of the limiting cavity and are fixedly connected with an upper driving rod and a lower driving rod respectively, one end of the compression block, far away from the grinding cavity, is fixedly connected with a compression spring, the other end of the compression spring is fixedly connected with the inner wall of the compression cavity, a switching rod with one end located in the grinding cavity is connected in the switching cavity in a sliding mode, a switching spring is fixedly connected to the left end of the switching rod on the front side, the left end of the switching spring is fixedly connected with the left inner wall of the switching cavity, a pneumatic cavity with a left opening is arranged in the right inner wall of the switching cavity on the front side, a pneumatic rod is connected in the pneumatic cavity in a sliding mode, a pneumatic spring is fixedly connected to the right end of the pneumatic rod, the right end of the pneumatic spring is fixedly connected with the right inner wall of the pneumatic cavity, and an air pipe communicated with the compression cavity on the front side is fixedly connected to the right end of; the rear side switching rod right-hand member fixedly connected with switch the spring, switch the spring right-hand member with switch intracavity right side inner wall fixed connection, the rear side be equipped with the opening rightwards in the switching intracavity left side inner wall the pneumatic chamber, pneumatic intracavity sliding connection has the pneumatic rod, pneumatic rod left end fixedly connected with the pneumatic spring, the pneumatic spring left end with pneumatic chamber left side inner wall fixed connection, the rear side pneumatic chamber left end fixedly connected with communicate the rear side the trachea in compression chamber.

The invention has the beneficial effects that: the device simple structure, convenient to use can grind three kinds of different types of medicinal materials simultaneously, has improved grinding efficiency greatly, during the grinding, only needs to put into the storage intracavity with the medicinal material of waiting to grind, and the device just can the autoloading ejection of compact, and automatic grinding can also filter the medicinal material after grinding, filters grinding medicinal material not up to standard, prevents to produce the influence to the effect of medicinal material.

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 structural diagram at A-A in FIG. 1 according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram at B-B in FIG. 1 according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram at C-C in FIG. 2 according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram at D-D in FIG. 3 according to an embodiment of the present invention.

The invention will now be described in detail with reference to fig. 1-5, 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.

The grinding mill with automatic grinding and screening functions, which is described in conjunction with fig. 1-5, comprises a box body 11, three grinding chambers 13 are arranged in the box body 11, a storage chamber 18 with three upward openings and communicated with the grinding chambers 13 is arranged in the upper inner wall of the grinding chamber 13, a clamping groove 16 with a rightward opening is arranged in the left inner wall of the storage chamber 18, a moving chamber 19 with a leftward opening is arranged in the lower inner wall of the storage chamber 18, a baffle plate 17 with a left end positioned in the clamping groove 16 is slidably connected in the moving chamber 19, a moving spring 20 is fixedly connected at the right end of the baffle plate 17, the right end of the moving spring 20 is fixedly connected with the right inner wall of the moving chamber 19, a sliding chamber 38 communicated with the grinding chambers 13 is arranged in the lower inner wall of the grinding chamber 13, a sliding plate 42 is slidably connected in the sliding chamber 38, a sliding spring 39 is fixedly connected at the right end of the sliding, the grinding mechanism 70 for grinding medicinal materials is arranged in the box body 11, the switching mechanism 71 comprises a translation cavity 23 located in the box body 11, a moving block 24 is connected in the translation cavity 23 in a sliding manner, a rotating cavity 26 with a downward opening and a leftward opening is arranged in the moving block 24, a rotating motor 28 is fixedly connected to the right inner wall of the rotating cavity 26, a rotating shaft 14 is connected to the rotating motor 28 in a power manner, three grinding discs 15 respectively located in the three grinding cavities 13 are fixedly connected to the rotating shaft 14, a gear 25 located in the rotating cavity 26 is connected to the rotating shaft 14 in a key manner, an annular groove 27 is formed in the gear 25, two racks 36 are fixedly connected to the lower inner wall of the rotating cavity 26, reset cavities 34 communicated with the translation cavity 23 are arranged in the upper and lower inner walls of the translation cavity 23, and reset blocks 29 are connected in the reset cavities, the utility model discloses a grinding machine, including reset block 29, be equipped with the draw-in groove 32 that the opening is to the right on reset block 29, reset block 29 keeps away from the one end fixedly connected with reset spring 35 of translation chamber 23, the reset spring 35 other end with reset chamber 34 keeps away from the inner wall fixed connection of translation chamber 23, be equipped with the intercommunication in the inner wall of the right side of reset chamber 34 the drive chamber 30 in reset chamber 34, it is located to drive intracavity 30 sliding connection's left end drive pole 33 in draw-in groove 32, it is equipped with screening mechanism 69 that is used for the medicinal material after the screening grinding to grind the chamber 13 below, screening mechanism 69 rear is equipped with and is used for controlling baffle 17 with drive mechanism 72 that sliding plate 42 opened and shut, be equipped with on the inner wall around grinding chamber 13 and be.

Beneficially, screening mechanism 69 includes and is located grind three discharge gate 53 in the inner wall under the chamber 13, be equipped with the intercommunication in the inner wall on the discharge gate 53 the screening chamber 43 of discharge gate 53, sliding connection has three screening container 12 in the screening chamber 43, be equipped with feed inlet 41 on the screening container 12, screening container 12 front end fixedly connected with pressure spring 44, pressure spring 44 front end with the preceding inner wall fixed connection of screening chamber 43 is three pass through connecting rod 37 fixed connection between the screening container 12, be equipped with on the inner wall under the discharge gate 53 and be used for storing the three storage container 54 that grinds the screening and accomplish the medicinal material.

Advantageously, the transmission mechanism 72 includes a transmission chamber 45 located in the rear inner wall of the screening chamber 43 and having a forward opening, a pneumatic spring 68 is fixedly connected to the right inner wall of the transmission chamber 45, a transmission shaft 47 is power-connected to the pneumatic spring 68, a cam 46 and a lead screw 48 are fixedly connected to the transmission shaft 47, a nut 49 is rotatably connected to the lead screw 48, a push chamber 51 communicating with the transmission chamber 45 is provided on each of the front and rear inner walls of the transmission chamber 45, a push block 50 is slidably connected to the push chamber 51, an extension spring 52 is fixedly connected to one end of the push block 50 away from the transmission chamber 45, the other end of the extension spring 52 is fixedly connected to the inner wall of the push chamber 51 away from the transmission chamber 45, a long wire 40 is fixedly connected to the push block 50 on the front side, the long wire 40 penetrates through the inner wall of the push chamber 51 on the front side and the right inner wall of the sliding chamber 38, a pull rope 21 is fixedly connected to the pushing block 50 at the rear side, and the pull rope 21 penetrates through the inner wall of the pushing cavity 51 at the rear side and the right inner wall of the moving cavity 19 to be fixedly connected with the right end of the baffle 17.

Beneficially, the switching mechanism 71 includes two compression cavities 56 located in the front and rear inner walls of the grinding cavity 13 and communicating with the grinding cavity 13, a compression block 58 is slidably connected in the compression cavity 56, a positioning cavity 59 with an upward opening is provided on the compression block 58, a limiting cavity 60 with a downward opening is provided in the upper inner wall of the compression cavity 56, a limiting block 61 is slidably connected in the limiting cavity 60, a limiting spring 62 is fixedly connected to the upper end of the limiting block 61, the upper end of the limiting spring 62 is fixedly connected to the upper inner wall of the limiting cavity 60, a string 31 is fixedly connected to the upper end of the limiting block 61, two strings 31 penetrate through the upper inner wall of the limiting cavity 60 and the inner wall of the string 31 and are respectively fixedly connected to the upper and lower two driving rods 33, a compression spring 57 is fixedly connected to one end of the compression block 58 far away from the grinding cavity 13, and the other end of the compression spring 57 is fixedly connected to, a switching cavity 64 with an opening facing the grinding cavity 13 is arranged in the lower inner wall of the compression cavity 56, a switching rod 63 with one end located in the grinding cavity 13 is connected in the switching cavity 64 in a sliding manner, a switching spring 65 is fixedly connected to the left end of the switching rod 63 at the front side, the left end of the switching spring 65 is fixedly connected with the left inner wall of the switching cavity 64, a pneumatic cavity 66 with a left opening is arranged in the right inner wall of the switching cavity 64 at the front side, a pneumatic rod 67 is connected in the pneumatic cavity 66 in a sliding manner, a pneumatic spring 68 is fixedly connected to the right end of the pneumatic rod 67, the right end of the pneumatic spring 68 is fixedly connected with the right inner wall of the pneumatic cavity 66, and an air pipe 55 communicated with the compression cavity 56 at the front side is fixedly; the rear side switch pole 63 right-hand member fixedly connected with switch spring 65, switch spring 65 right-hand member with switch chamber 64 right side inner wall fixed connection, the rear side be equipped with the opening rightward in the left inner wall of switch chamber 64 pneumatic chamber 66, sliding connection has in pneumatic chamber 66 pneumatic pole 67, pneumatic pole 67 left end fixed connection has pneumatic spring 68, pneumatic spring 68 left end with the left inner wall fixed connection of pneumatic chamber 66, the rear side pneumatic chamber 66 left end fixed connection has the intercommunication rear side compress chamber 56 trachea 55.

In the initial state, the three storage cavities 18 are respectively filled with the medicinal materials to be ground, and the limiting spring 62 and the return spring 35 are in a compressed state.

The using method comprises the following steps: when the medicinal materials are needed to be ground, the pneumatic spring 68 and the rotating motor 28 start to work, the pneumatic spring 68 works to drive the transmission shaft 47 to start rotating, so as to drive the screw rod 48 to start rotating, so as to drive the nut 49 to move backwards, when the nut 49 moves to the position of the right pushing block 50, the right pushing block 50 is pushed to move rightwards, so as to tension the pull rope 21, so as to drive the three baffles 17 to move rightwards, at the moment, the moving spring 20 and the right stretching spring 52 are in a compressed state, so that the medicinal materials in the storage cavity 18 enter the grinding cavity 13, the rotating motor 28 works to drive the rotating shaft 14 to start rotating, so as to drive the three grinding discs 15 to start rotating, so as to grind the medicinal materials, the rotating shaft 14 rotates to drive the gear 25 to start rotating, so as to drive the gear 25, the rotating shaft 14 and the three grinding discs, the reset block 29 and the driving rod 33 move towards the direction close to the rotating motor 28 under the action of the reset spring 35, so as to loosen the string 31, the limit block 61 moves downwards under the action of the limit spring 62, when the gear 25 moves to the position of the rear compression block 58, the rear switching rod 63 is positioned in the annular groove 27, then the gear 25 pushes the rear compression block 58 to move backwards, so that the rear limit block 61 is positioned in the rear positioning cavity 59, the position of the rear compression block 58 is fixed, the rear compression block 58 moves backwards to compress the air in the compression cavity 56, so as to push the rear pneumatic rod 67 to move rightwards, so as to push the switching rod 63 to move rightwards, so as to drive the gear 25 to move rightwards, so that the gear 25 is meshed with the rack 36 on the right side, when the gear 25 rotates, the gear 25 and the rotating shaft 14 and the three grinding discs 15 move forwards, when the moving block 24 moves forwards to push the reset block 29 and the driving rod 33 to move away from the rotating motor 28, the wire 31 is pulled to drive the stop block 61 to move upwards, at the moment, the rear compression block 58 moves forwards to reset under the action of the rear compression spring 57, at the moment, the rear pneumatic rod 67 resets under the action of the rear pneumatic spring 68, the rear switching rod 63 resets under the action of the rear switching spring 65, when the moving block 24 is separated from the reset cavity 34, the reset block 29 and the driving rod 33 move towards the direction close to the rotating motor 28 under the action of the reset spring 35, so that the wire 31 is loosened, the stop block 61 moves downwards under the action of the stop spring 62, when the gear 25 moves to the position of the front compression block 58, the front switching rod 63 is positioned in the annular groove 27, then the gear 25 pushes the front compression block 58 to move forwards, so that the front stop block 61 is positioned in the front positioning cavity 59, the position of the front compression block 58 is fixed, the front compression block 58 moves forwards to compress the gas in the compression cavity 56, thereby pushing the front pneumatic rod 67 to move leftwards, pushing the switching rod 63 to move leftwards, driving the gear 25 to move leftwards, and enabling the gear 25 to be meshed with the left rack 36, and driving the gear 25, the rotating shaft 14 and the three grinding discs 15 to move backwards when the gear 25 rotates, and repeating the above actions to further grind the medicinal materials; after grinding for a period of time, the nut 49 moves on the screw rod 48 until moving to the position of the left pushing block 50, the left pushing block 50 is pushed to move leftwards, thereby tensioning the long wire 40, thereby driving the three sliding plates 42 to move rightwards, the ground medicinal materials in the grinding cavity 13 fall into the screening container 12, at the moment, the nut 49 and the left stretching spring 52 are in a compressed state, the medicinal materials in the storage cavity 18 enter the grinding cavity 13 respectively, the pneumatic spring 68 works to drive the transmission shaft 47 to rotate, thereby driving the cam 46 to rotate, thereby intermittently pushing the screening container 12 to move forwards, thereby screening the ground medicinal powder, storing the medicinal residues which do not reach the requirement in the screening container 12, storing the medicinal powder reaching the standard in the storage container 54, when the nut 49 reaches the rearmost part, the pneumatic spring 68 starts to rotate reversely, thereby driving the components to reset, the pneumatic spring 68 continuously opens the baffle 17 to feed materials and opens the sliding plate 42 to carry out screening by positive and negative rotation, and the grinding and screening of the medicinal materials are completed.

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.

Claims (4)

1. The utility model provides an automatic grind mill of screening, includes the box, its characterized in that: the box body is internally provided with three grinding cavities, the upper inner wall of each grinding cavity is internally provided with a storage cavity with three upward openings and communicated with the grinding cavity, the left inner wall of each storage cavity is internally provided with a clamping groove with a rightward opening, the lower inner wall of each storage cavity is internally provided with a moving cavity with a leftward opening, the moving cavity is internally and slidably connected with a baffle plate with the left end positioned in the clamping groove, the right end of the baffle plate is fixedly connected with a moving spring, the right end of the moving spring is fixedly connected with the right inner wall of the moving cavity, the lower inner wall of each grinding cavity is internally provided with a sliding cavity communicated with the grinding cavity, the sliding cavity is internally and slidably connected with a sliding plate, the right end of the sliding plate is fixedly connected with a sliding spring, the right end of the sliding spring is fixedly connected with the right inner wall of the sliding, a moving block is connected in the translation cavity in a sliding manner, a rotating cavity with a downward opening and a leftward opening is arranged in the moving block, a rotating motor is fixedly connected to the right inner wall of the rotating cavity, a rotating shaft is connected to the rotating motor in a power manner, three grinding discs respectively positioned in the three grinding cavities are fixedly connected to the rotating shaft, a gear positioned in the rotating cavity is connected to the rotating shaft in a key manner, an annular groove is formed in the gear, two racks are fixedly connected to the lower inner wall of the rotating cavity, reset cavities communicated with the translation cavity are respectively arranged in the upper inner wall and the lower inner wall of the translation cavity, a reset block is connected in the reset cavity in a sliding manner, a clamping groove with a rightward opening is formed in the reset block, a reset spring is fixedly connected to one end, away from the translation cavity, of the reset block, the medical grinding device is characterized in that a communicating cavity is formed in the right inner wall of the reset cavity, a driving cavity is formed in the reset cavity, the left end of the driving cavity is located in a driving rod in the clamping groove, a screening mechanism used for screening ground medicinal materials is arranged below the grinding cavity, a transmission mechanism used for controlling the baffle and the sliding plate to open and close is arranged behind the screening mechanism, and a switching mechanism used for controlling the front and back movement of the grinding mechanism is arranged on the front and back inner walls of the grinding cavity.

2. An automated abrasive screening mill as claimed in claim 1, wherein: screening mechanism is including being located grind three discharge gate in the inner wall under the chamber, be equipped with the intercommunication in the discharge gate upper inner wall the screening chamber of discharge gate, screening intracavity sliding connection has three screening container, be equipped with the feed inlet on the screening container, screening container front end fixedly connected with pressure spring, the pressure spring front end with the preceding inner wall fixed connection in screening chamber, it is three through connecting rod fixed connection between the screening container, be equipped with the three reservoir vessel that is used for storing grinding screening completion medicinal material under the discharge gate on the inner wall.

3. An automated abrasive screening mill as claimed in claim 1, wherein: the transmission mechanism comprises a transmission cavity which is positioned in the rear inner wall of the screening cavity and has a forward opening, the right inner wall of the transmission cavity is fixedly connected with a pneumatic spring, the pneumatic spring is connected with a transmission shaft in a power mode, the transmission shaft is fixedly connected with a cam and a lead screw, the lead screw is connected with a nut in a rotating mode, the front inner wall and the rear inner wall of the transmission cavity are respectively provided with a pushing cavity communicated with the transmission cavity, the pushing cavity is internally connected with a pushing block in a sliding mode, one end, away from the transmission cavity, of the pushing block is fixedly connected with an extension spring, the other end of the extension spring is fixedly connected with the inner wall, away from the transmission cavity, of the pushing cavity, the pushing block on the front side is fixedly connected with a long wire, the long wire penetrates through the inner wall of the pushing cavity on the front side and, the pull rope penetrates through the inner wall of the pushing cavity and the right inner wall of the moving cavity at the rear side and is fixedly connected with the right end of the baffle.

4. An automated abrasive screening mill as claimed in claim 1, wherein: the switching mechanism comprises two compression cavities which are positioned in the front inner wall and the rear inner wall of the grinding cavity and are communicated with the grinding cavity, a compression block is connected in the compression cavity in a sliding manner, a positioning cavity with an upward opening is arranged on the compression block, a limiting cavity with a downward opening is arranged in the upper inner wall of the compression cavity, a limiting block is connected in the limiting cavity in a sliding manner, a limiting spring is fixedly connected to the upper end of the limiting block, the upper end of the limiting spring is fixedly connected with the upper inner wall of the limiting cavity, a thin rope is fixedly connected to the upper end of the limiting block, the two thin ropes penetrate through the upper inner wall of the limiting cavity and are fixedly connected with an upper driving rod and a lower driving rod respectively, one end of the compression block, far away from the grinding cavity, is fixedly connected with a compression spring, the other end of the compression spring is fixedly connected with the inner wall, a switching rod with one end located in the grinding cavity is connected in the switching cavity in a sliding mode, a switching spring is fixedly connected to the left end of the switching rod on the front side, the left end of the switching spring is fixedly connected with the left inner wall of the switching cavity, a pneumatic cavity with a left opening is arranged in the right inner wall of the switching cavity on the front side, a pneumatic rod is connected in the pneumatic cavity in a sliding mode, a pneumatic spring is fixedly connected to the right end of the pneumatic rod, the right end of the pneumatic spring is fixedly connected with the right inner wall of the pneumatic cavity, and an air pipe communicated with the compression cavity on the front side is fixedly connected to the right end of; the rear side switching rod right-hand member fixedly connected with switch the spring, switch the spring right-hand member with switch intracavity right side inner wall fixed connection, the rear side be equipped with the opening rightwards in the switching intracavity left side inner wall the pneumatic chamber, pneumatic intracavity sliding connection has the pneumatic rod, pneumatic rod left end fixedly connected with the pneumatic spring, the pneumatic spring left end with pneumatic chamber left side inner wall fixed connection, the rear side pneumatic chamber left end fixedly connected with communicate the rear side the trachea in compression chamber.

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