阅读说明：本技术 药物熔点仪 (Medicine melting point instrument ) 是由 牛晓东 于 2021-01-18 设计创作，主要内容包括：本发明属于熔点仪技术领域,提供了一种药物熔点仪,包括熔点仪本体、毛细管、盛料装置和送料装置。盛料装置包括：容器和用于驱动容器水平移动的横移机构。送料装置包括：支架；第一升降机构,其用于驱动支架沿竖直方向往复移动；送料管,其与毛细管一一对应设置,其包括与支架固定连接的第一管体和位于第一管体下方、且与第一管体连通的第二管体,第一管体的外径大于第二管体的外径,第二管体的外径小于毛细管的内径；活塞,其设置在第一管体内,其在第一管体内可以沿竖直方向往复移动；以及第二升降机构,其设置在支架上,其用于驱动活塞在第一管体内沿竖直方向往复移动。本发明提供的药物熔点仪,简化了操作人员的操作,避免了毛细管的损坏。(The invention belongs to the technical field of melting point instruments, and provides a drug melting point instrument which comprises a melting point instrument body, a capillary tube, a material containing device and a feeding device. Flourishing material device includes: a container and a transverse moving mechanism for driving the container to move horizontally. The feeding device comprises: a support; the first lifting mechanism is used for driving the support to reciprocate along the vertical direction; the feeding pipes are arranged in one-to-one correspondence with the capillaries and comprise first pipe bodies fixedly connected with the support and second pipe bodies positioned below the first pipe bodies and communicated with the first pipe bodies, the outer diameters of the first pipe bodies are larger than those of the second pipe bodies, and the outer diameters of the second pipe bodies are smaller than the inner diameters of the capillaries; a piston disposed in the first tube body and capable of reciprocating in a vertical direction in the first tube body; and the second lifting mechanism is arranged on the bracket and used for driving the piston to reciprocate in the first pipe body along the vertical direction. The drug melting point instrument provided by the invention simplifies the operation of operators and avoids the damage of capillaries.)

1. A drug melting point apparatus comprises a melting point apparatus body and a plurality of capillary tubes; the method is characterized in that: the device also comprises a material containing device and a feeding device;

the flourishing material device includes:

a container for holding a powdered medicament; and

the transverse moving mechanism is arranged on the melting point instrument body and is used for driving the container to reciprocate along the horizontal direction;

the feeding device comprises:

the bracket is arranged above the material containing device;

the first lifting mechanism is arranged on the melting point instrument body and used for driving the support to reciprocate along the vertical direction;

the feeding pipes are arranged in one-to-one correspondence with the capillaries and comprise first pipe bodies fixedly connected with the supports and second pipe bodies positioned below the first pipe bodies and communicated with the first pipe bodies, the outer diameters of the first pipe bodies are larger than those of the second pipe bodies, and the outer diameters of the second pipe bodies are smaller than the inner diameters of the capillaries;

a piston disposed within the first tube, which is reciprocally movable in a vertical direction within the first tube, and which maintains a seal with the first tube; and

and the second lifting mechanism is arranged on the bracket and used for driving the piston to reciprocate in the first pipe body along the vertical direction.

2. The drug melting point apparatus of claim 1, wherein: the container comprises a rubber sleeve with an open upper end and a first magnetic element fixedly arranged at the bottom of the rubber sleeve;

the traversing mechanism comprises:

the first base is fixedly connected with the melting point instrument body;

the first screw is rotatably arranged on the first base;

the first motor is fixedly arranged on the first base and is used for driving the first screw rod to rotate; and

the first connecting block is connected with the first base in a sliding mode and is in threaded connection with the first screw rod;

the flourishing material device still includes:

the disc is detachably connected with the first connecting block, a through hole is formed in the middle of the disc, and the axis of the through hole is overlapped with the axis of the disc;

the opening mechanism is arranged on the disc and is used for opening the open end of the rubber sleeve and keeping the open end in an opened state; and

and the second magnetic element is fixedly arranged on the first connecting block, the axis of the second magnetic element is superposed with the axis of the through hole, and the second magnetic element and the first magnetic element are mutually attracted through magnetic force.

3. The drug melting point apparatus of claim 1, wherein: the expanding mechanism comprises a plurality of expanding components which are uniformly distributed around the circumference of the through hole and an operating component for driving the expanding components;

the distraction assembly includes:

the support rod is arranged in the through hole along the vertical direction, the upper end of the support rod extends to the upper part of the disc, and the lower end of the support rod extends to the lower part of the disc;

the first support is fixedly arranged on the disc and is close to the through hole;

the second support is fixedly arranged on the disc and close to the edge of the disc, and a guide hole is formed in the second support;

one end of the sliding rod is connected with the upper end of the supporting rod, and the other end of the sliding rod penetrates through the first support and is in sliding connection with the first support; and

one end of the pull rope is connected with the other end of the sliding rod, and the other end of the pull rope penetrates through the guide hole;

the operating assembly includes:

the movable lantern ring is sleeved outside the disc, is in threaded connection with the disc, and is connected with the other end of the pull rope; and

a locking screw disposed outside the movable collar in threaded connection with the movable collar for holding the movable collar and the disk relatively stationary.

4. The drug melting point apparatus of claim 1, wherein: the first lifting mechanism includes:

the second base is fixedly arranged on the melting point instrument body along the vertical direction;

the second screw is rotatably arranged on the second base along the vertical direction; and

the second motor is arranged on the second base and is used for driving the second screw rod to rotate;

the support is connected with the second base in a sliding mode, and the support is connected with the second screw in a threaded mode.

5. The drug melting point apparatus of claim 1, wherein: the second lifting mechanism comprises:

the end head is fixedly arranged at the upper end of the first pipe body;

the rotating shafts are rotatably arranged on the bracket along the vertical direction and are in one-to-one correspondence with the feeding pipes;

the sleeve is sleeved at the lower end of the rotating shaft, can slide along the axial direction of the rotating shaft, can rotate along with the rotating shaft, penetrates through the end socket and is fixedly connected with the piston, and is in threaded connection with the end socket;

the worm wheel is sleeved outside the rotating shaft and rotates along with the rotating shaft;

the worm is rotatably arranged on the bracket along the horizontal direction and is meshed with the worm gears; and

and the third motor is arranged on the bracket and is used for driving the worm to rotate.

Technical Field

The invention relates to the technical field of melting point instruments, in particular to a drug melting point instrument.

Background

Melting point meters are defined by physical chemistry, and melting point of a substance refers to the temperature at which the substance changes from a solid state to a liquid state.

The specific operation of filling the drug into the capillary tube of the current drug melting point instrument is as follows: the open end of the capillary tube is inserted into the mortar, a certain amount of powder medicine is filled in the open end of the capillary tube, then the capillary tube is placed into the sample loading tube, the closed end of the capillary tube faces downwards to perform free falling motion, after the capillary tube impacts the glass plate and stops moving, the powder medicine slides to the closed end of the capillary tube, and thus 5-8 times of free falling motion is performed, and the powder medicine can fall into the closed end from the open end of the capillary tube. The drug melting point apparatus is provided with a plurality of capillaries, namely, the sample loading operation of the capillaries is carried out at one time, so the operation process has the defect of complicated operation. In addition, the capillary tube may be damaged by free fall movement.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a drug melting point instrument, so that the operation is simplified and the damage to a capillary is avoided.

In order to achieve the above object, the present invention provides a drug melting point apparatus, comprising a melting point apparatus body and a plurality of capillaries; the device also comprises a material containing device and a feeding device;

the flourishing material device includes:

a container for holding a powdered medicament; and

the transverse moving mechanism is arranged on the melting point instrument body and is used for driving the container to reciprocate along the horizontal direction;

the feeding device comprises:

the bracket is arranged above the material containing device;

the first lifting mechanism is arranged on the melting point instrument body and used for driving the support to reciprocate along the vertical direction;

the feeding pipes are arranged in one-to-one correspondence with the capillaries and comprise first pipe bodies fixedly connected with the supports and second pipe bodies positioned below the first pipe bodies and communicated with the first pipe bodies, the outer diameters of the first pipe bodies are larger than those of the second pipe bodies, and the outer diameters of the second pipe bodies are smaller than the inner diameters of the capillaries;

a piston disposed within the first tube, which is reciprocally movable in a vertical direction within the first tube, and which maintains a seal with the first tube; and

and the second lifting mechanism is arranged on the bracket and used for driving the piston to reciprocate in the first pipe body along the vertical direction.

Further, the container comprises a rubber sleeve with an open upper end and a first magnetic element fixedly arranged at the bottom of the rubber sleeve;

the traversing mechanism comprises:

the first base is fixedly connected with the melting point instrument body;

the first screw is rotatably arranged on the first base;

the first motor is fixedly arranged on the first base and is used for driving the first screw rod to rotate; and

the first connecting block is connected with the first base in a sliding mode and is in threaded connection with the first screw rod;

the flourishing material device still includes:

the disc is detachably connected with the first connecting block, a through hole is formed in the middle of the disc, and the axis of the through hole is overlapped with the axis of the disc;

the opening mechanism is arranged on the disc and is used for opening the open end of the rubber sleeve and keeping the open end in an opened state; and

and the second magnetic element is fixedly arranged on the first connecting block, the axis of the second magnetic element is superposed with the axis of the through hole, and the second magnetic element and the first magnetic element are mutually attracted through magnetic force.

Furthermore, the expanding mechanism comprises a plurality of expanding components which are uniformly distributed around the circumference of the through hole and an operating component for driving the expanding components;

the distraction assembly includes:

the support rod is arranged in the through hole along the vertical direction, the upper end of the support rod extends to the upper part of the disc, and the lower end of the support rod extends to the lower part of the disc;

the first support is fixedly arranged on the disc and is close to the through hole;

the second support is fixedly arranged on the disc and close to the edge of the disc, and a guide hole is formed in the second support;

one end of the sliding rod is connected with the upper end of the supporting rod, and the other end of the sliding rod penetrates through the first support and is in sliding connection with the first support; and

one end of the pull rope is connected with the other end of the sliding rod, and the other end of the pull rope penetrates through the guide hole;

the operating assembly includes:

the movable lantern ring is sleeved outside the disc, is in threaded connection with the disc, and is connected with the other end of the pull rope; and

a locking screw disposed outside the movable collar in threaded connection with the movable collar for holding the movable collar and the disk relatively stationary.

Further, the first elevating mechanism includes:

the second base is fixedly arranged on the melting point instrument body along the vertical direction;

the second screw is rotatably arranged on the second base along the vertical direction; and

the second motor is arranged on the second base and is used for driving the second screw rod to rotate;

the support is connected with the second base in a sliding mode, and the support is connected with the second screw in a threaded mode.

Further, the second elevating mechanism includes:

the end head is fixedly arranged at the upper end of the first pipe body;

the rotating shafts are rotatably arranged on the bracket along the vertical direction and are in one-to-one correspondence with the feeding pipes;

the sleeve is sleeved at the lower end of the rotating shaft, can slide along the axial direction of the rotating shaft, can rotate along with the rotating shaft, penetrates through the end socket and is fixedly connected with the piston, and is in threaded connection with the end socket;

the worm wheel is sleeved outside the rotating shaft and rotates along with the rotating shaft;

the worm is rotatably arranged on the bracket along the horizontal direction and is meshed with the worm gears; and

and the third motor is arranged on the bracket and is used for driving the worm to rotate.

The invention has the beneficial effects that: according to the drug melting point instrument, after the powder drug is filled on the material containing device, the powder drug can be automatically filled into the capillary tube through the material feeding device, so that the operation of an operator is simplified, and the damage of the capillary tube is avoided.

Drawings

In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

Fig. 1 is a schematic structural diagram of a drug melting point apparatus according to an embodiment of the present invention;

FIG. 2 is a perspective view of the material holding device at one viewing angle;

FIG. 3 is a perspective view of the holding device from another perspective;

FIG. 4 is a top view of the holding device;

FIG. 5 is a cross-sectional view taken along the line A-A in FIG. 4;

fig. 6 is an enlarged schematic view of a portion B in fig. 1.

Reference numerals:

10. a melting point apparatus body; 11. a heating unit; 12. a touch screen; 13. an observation window;

20. a material containing device; 21. a rubber sleeve; 22. a first magnetic element; 23. a traversing mechanism; 231. a first base; 232. a first screw; 233. a first motor; 234. a first connection block; 2341. positioning a groove; 24. a disc; 241. a through hole; 242. a positioning column; 251. a stay bar; 252. a first support; 253. a second support; 254. a slide bar; 255. pulling a rope; 256. a movable collar; 257. a locking screw;

30. a feeding device; 31. a support; 32. a first lifting mechanism; 321. a second base; 322. a second screw; 323. a second motor; 33. a feed pipe; 331. a first pipe body; 332. a second tube body; 34. a piston; 35. a second lifting mechanism; 351. a tip; 352. a rotating shaft; 353. a sleeve; 354. a worm gear; 355. a worm; 356. a third motor;

50. a capillary tube.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.

In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

As shown in fig. 1 to 6, the present embodiment provides a drug melting point apparatus, which includes a melting point apparatus body 10, a plurality of capillary tubes 50, a material containing device 20 and a material feeding device 30.

The melting point apparatus body 10 is provided with a heating unit 11 for inserting a plurality of capillaries 50 and heating the capillaries 50, and the melting point apparatus body 10 is provided with a touch screen 12 and an observation window 13. In this embodiment, there are three capillaries 50, and the three capillaries 50 are arranged in a straight line after being inserted into the melting point apparatus body 10.

The holding device 20 comprises a container and a traversing mechanism 23. The container is used for containing powder medicine. The traversing mechanism 23 is mounted on the melting point apparatus body 10 and is used for driving the container to reciprocate along the horizontal direction.

The feeding device 30 comprises a bracket 31, a first lifting mechanism 32, a feeding pipe 33, a piston 34 and a second lifting mechanism 35. The bracket 31 is arranged above the material containing device 20, and the bracket 31 is driven by a first lifting mechanism 32. The first elevating mechanism 32 is installed on the melting point apparatus body 10 for driving the carriage 31 to reciprocate in the vertical direction.

The feeding pipes 33 are arranged in one-to-one correspondence with the capillary tubes 50, each feeding pipe 33 comprises a first pipe body 331 fixedly connected with the support 31 and a second pipe body 332 located below the first pipe body 331 and communicated with the first pipe body 331, and the first pipe body 331 is fixedly connected with the support 31 through a connecting arm. The outer diameter of the first tubular body 331 is larger than the outer diameter of the second tubular body 332, the inner diameter of the first tubular body 331 is also larger than the inner diameter of the second tubular body 332, and the outer diameter of the second tubular body 332 is smaller than the inner diameter of the capillary 50.

The piston 34 is located in the first tube 331 and can reciprocate in the vertical direction, and the piston 34 is always sealed with the first tube 331, that is, a seal is maintained between the outer wall of the piston 34 and the inner wall of the first tube 331.

The second elevating mechanism 35 is provided on the bracket 31 for driving the piston 34 to reciprocate in the vertical direction within the first tubular body 331.

In this embodiment, the ground powder medicine is poured into the container, then the traverse mechanism 23 drives the container to move to a position right below one feeding pipe 33, and then the first lifting mechanism 32 lowers the feeding pipe 33 by a certain height, so that the lower end of the second pipe body 332 extends into the powder medicine in the container, and in this process, the container does not interfere with the up-and-down movement of other feeding pipes 33. Then, the second elevating mechanism 35 raises the piston 34 by a certain height, so that a negative pressure is generated at the lower end of the second tube 332 to suck a part of the powdered medicine into the second tube 332, then, the traverse mechanism 23 drives the container to return to a position where it does not interfere with the up-and-down movement of the three feed pipes 33, then, the first elevating mechanism 32 lowers the feed pipes 33 to extend into the capillary 50, and then, the second elevating mechanism 35 slowly lowers the piston 34 to feed the powdered medicine in the first tube 331 to the closed end of the capillary 50. The first elevator mechanism 32 then returns the feed tube 33 to the initial position above the reservoir and the above steps are repeated until all three capillary tubes 50 are filled with powdered medicament.

Since the feed tube 33 is inserted into the capillary 50, the diameter of the feed tube 33 is small, which makes it inconvenient to install the piston 34. By dividing the feeding pipe 33 into two sections of pipe bodies with different diameters, it is ensured that the second pipe body 332 can extend into the capillary 50, the piston 34 can be conveniently installed in the first pipe body 331, and the height of the first pipe body 331 can be designed to be smaller, so that the occupation of the installation space is reduced.

The operation of the loading device 20 and the feeding device 30 is controlled by a controller, which is not shown in the drawings.

In one embodiment, the container comprises a rubber sleeve 21 with an open upper end and a first magnetic element 22 fixedly arranged at the bottom of the rubber sleeve 21, wherein the first magnetic element 22 is fixedly arranged at the inner side or the outer side of the bottom of the rubber sleeve 21 in an adhesion mode.

The traverse mechanism 23 includes a first base 231, a first screw 232, a first motor 233, and a first link 234. The first base 231 is fixedly connected with the melting point apparatus body 10, the first screw 232 is rotatably arranged on the first base 231, the first motor 233 is fixedly arranged on the first base 231, and the first motor 233 is used for driving the first screw 232 to rotate. The first connecting block 234 is slidably connected to the first base 231 and is threadedly connected to the first screw 232. The first motor 233 rotates to drive the first screw 232 to rotate, so as to drive the first connecting block 234 to move back and forth, and further drive the container to move back and forth.

The holding device 20 further comprises a disc 24, a spreading mechanism and a second magnetic element. The disc 24 is detachably connected to the first connection block 234. Preferably, two positioning posts 242 are fixedly disposed at the bottom of the circular plate 24, and two positioning slots 2341 are correspondingly formed in the first connecting block 234, so that the circular plate 24 is mounted on the first connecting block 234 and moves together with the first connecting block 234 after the positioning posts 242 are inserted into the positioning slots 2341. The middle part of the disc 24 is provided with a through hole 241, and the axis of the through hole 241 is coincident with the axis of the disc 24. The expanding mechanism is arranged on the disc 24 and is used for expanding the open end of the rubber sleeve 21 and keeping the open end in an expanded state. The second magnetic element is fixedly disposed on the first connection block 234, an axis of the second magnetic element coincides with an axis of the through hole 241, the second magnetic element and the first magnetic element 22 are attracted to each other by a magnetic force, and both the first magnetic element 22 and the second magnetic element are permanent magnets.

In this embodiment, since the powder medicine to be ground is less, in order to ensure that the second tube 332 can inhale the powder medicine, the powder medicine in the container is accumulated to a certain thickness so that the second tube 332 can inhale the powder medicine, and the conventional container (such as a test tube) is not convenient for pouring the powder medicine into the conventional container, therefore, the rubber sleeve 21 is used as a container for containing the powder medicine, when the container is used for containing the powder medicine, the open end of the rubber sleeve 21 is spread by the spreading mechanism, and the bottom of the rubber sleeve 21 is fixed together by the first magnetic element 22 and the second magnetic element, therefore, the open end of the rubber sleeve 21 is spread and is spread into a funnel shape as a whole, so that the powder medicine can be poured into the rubber sleeve 21. Then, the opening of the open end of the rubber sleeve 21 is reduced through the expanding mechanism, so that the stacking height of the powder medicine in the rubber sleeve 21 is increased, and the subsequent second tube body 332 can conveniently suck the powder medicine.

The design is ingenious, the powder medicine is conveniently contained, and the effect that the second tube body 332 inhales the powder medicine is guaranteed.

In one embodiment, the distracting mechanism includes a plurality of distracting assemblies evenly spaced around the circumference of the through-hole 241 and an operating assembly for driving the distracting assemblies.

The spreading assembly includes a spreader bar 251, a first support 252, a second support 253, a sliding bar 254, and a pull cord 255. The stay 251 is disposed in the through hole 241 in a vertical direction, and its upper end protrudes above the disc 24. The lower ends of the supporting rods 251 extend out of the lower side of the disc 24, so that the rubber sleeve 21 can be conveniently sleeved outside the supporting rods 251. The first holder 252 is fixedly disposed on the disk 24 and adjacent to the through hole 241. The second support 253 is fixedly disposed on the disk 24 and is adjacent to the edge of the disk 24, and has a guide hole formed therein. Preferably, the first seat 252 and a corresponding one of the second seats 253 are located in the same radial direction of the disc 24. One end of the sliding rod 254 is connected to the upper end of the stay 251, and the other end thereof passes through the first support 252 and is slidably connected to the first support 252. One end of the pull rope 255 is connected with the other end of the sliding rod 254, the other end of the pull rope passes through the guide hole, and the diameter of the guide hole is larger than that of the pull rope 255.

The operating assembly includes a moveable collar 256 and a locking screw 257. The movable lantern ring 256 is sleeved outside the disc 24 and is in threaded connection with the disc 24, and the movable lantern ring 256 is connected with the other end of the pulling rope 255. A locking screw 257 is provided outside the moveable collar 256, which is threadedly connected to the moveable collar 256, for holding the moveable collar 256 and the disc 24 relatively stationary.

In this embodiment, the movable collar 256 is manually rotated, so that the other end of the pulling rope 255 pulls the sliding rod 254 to move outwards, thereby driving the stay 251 to move outwards, further expanding the open end of the rubber sleeve 21, and then locking the movable collar 256 through the locking screw 257, so that the open end of the rubber sleeve 21 is kept in an expanded state. The arrangement realizes the opening operation of the open end of the rubber sleeve 21 through simple operation, and the structural design is ingenious.

In one embodiment, the first elevating mechanism 32 includes a second base 321, a second screw 322, and a second motor 323. The second base 321 is fixedly arranged on the melting point apparatus body 10 along the vertical direction, and the second screw 322 is rotatably arranged on the second base 321 along the vertical direction. The second motor 323 is installed on the second base 321, and the second motor 323 is used for driving the second screw 322 to rotate. The bracket 31 is slidably connected to the second base 321, and the bracket 31 is further connected to the second screw 322 by a screw. The second motor 323 rotates to finally drive the bracket 31 to lift.

In one embodiment, the second lifting mechanism 35 includes a head 351, a shaft 352, a sleeve 353, a worm gear 354, a worm 355, and a third motor 356. The end 351 is fixedly arranged at the upper end of the first tube body 331, preferably, the end 351 is provided with air holes, so that in the process that the piston 34 moves upwards, air between the piston 34 and the end 351 can be discharged from the air holes, and the problem that the piston 34 is difficult to move more and more is avoided. The rotating shaft 352 is rotatably arranged on the bracket 31 along the vertical direction, and the rotating shaft 352 and the feeding pipes 33 are arranged in a one-to-one correspondence manner. The sleeve 353 and the worm gear 354 are arranged in one-to-one correspondence with the rotating shaft 352, wherein the sleeve 353 is sleeved at the lower end of the rotating shaft 352, the sleeve 353 can slide along the axial direction of the rotating shaft 352, the sleeve 353 can also rotate along with the rotating shaft 352, the sleeve 353 penetrates through the end head 351 and then is fixedly connected with the piston 34, and the sleeve 353 is in threaded connection with the end head 351. The worm gear 354 is sleeved on the rotating shaft 352 and rotates along with the rotating shaft 352. A worm 355 is rotatably provided on the bracket 31 in the horizontal direction, and is engaged with the plurality of worm wheels 354. A third motor 356 is mounted on the carriage 31 and is used to drive the rotation of the worm 355.

In this embodiment, the third motor 356 drives the worm gear 355 to rotate, and the worm gear 355 drives the worm gears 354 to rotate together, so that the rotating shafts 352 rotate synchronously, and the pistons 34 are driven to move up and down together through the sleeves 353. With the above arrangement, the plurality of pistons 34 can be lifted and lowered by only one power source.

In the description of the present invention, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.