CN220366637U

CN220366637U - Pharmacy desiccator

Info

Publication number: CN220366637U
Application number: CN202321699259.0U
Authority: CN
Inventors: 耿伟; 吴红霞; 钟明; 陈迹
Original assignee: First Affiliated Hospital of Xinjiang Medical University
Current assignee: First Affiliated Hospital of Xinjiang Medical University
Priority date: 2023-06-30
Filing date: 2023-06-30
Publication date: 2024-01-19
Anticipated expiration: 2033-06-30

Abstract

The utility model relates to the technical field of pharmaceutical equipment, in particular to a pharmaceutical dryer, which comprises a box body, wherein a discharge hole is formed in the bottom of the right side of the box body, a feed pipe is inserted into the top of the box body close to the left side, the top of the feed pipe is fixedly connected with a feed hopper, a dustproof mechanism is arranged at the top of the feed hopper, an exhaust port is formed in the top of the box body close to the right side, heating flat plates are fixedly arranged on the left side and the right side of an inner cavity of the box body, a material homogenizing mechanism is arranged in the inner cavity of the box body close to the top, a stirring mechanism is arranged at the bottom of the inner cavity of the box body, and a turnover mechanism is arranged on the outer side of the box body. The utility model improves the uniformity of raw material spreading and further improves the drying efficiency of pharmaceutical raw materials.

Description

Pharmacy desiccator

Technical Field

The utility model relates to the technical field of pharmaceutical equipment, in particular to a pharmaceutical dryer.

Background

The dryer refers to mechanical equipment for reducing the moisture of materials by utilizing heat energy and is used for drying the materials. The dryer evaporates moisture in the material by heating to obtain a solid material of a defined moisture content.

In the current pharmaceutical industry, it is often necessary to use a dryer to dry pharmaceutical raw materials, but the existing dryer has low drying efficiency on pharmaceutical raw materials, and is inconvenient to rapidly discharge the dried raw materials, so that the pharmaceutical efficiency is reduced, and the pharmaceutical efficiency is improved.

Disclosure of Invention

The present utility model is directed to a pharmaceutical dryer for solving the above-mentioned problems in the prior art.

The technical scheme of the utility model is that the pharmaceutical dryer comprises a box body, wherein a discharge hole is formed in the bottom of the right side of the box body, a feed pipe is inserted into the top of the box body close to the left side, the top of the feed pipe is fixedly connected with a feed hopper, a dustproof mechanism is arranged at the top of the feed hopper, an exhaust port is formed in the top of the box body close to the right side, heating flat plates are fixedly arranged on the left side and the right side of an inner cavity of the box body, a material homogenizing mechanism is arranged in the inner cavity of the box body close to the top, a stirring mechanism is arranged at the bottom of the inner cavity of the box body, and a turnover mechanism is arranged on the outer side of the box body.

In one embodiment, the dustproof mechanism comprises a dustproof plate, the dustproof plate is attached to the top of the feed hopper, the right side of the dustproof plate is fixedly connected with a hollow cylinder, the bottom of the hollow cylinder is fixedly connected with a sliding block, the top of the box body is close to the left side and is provided with a sliding groove, the sliding block is movably connected to the inner cavity of the sliding groove, the inner cavity of the hollow cylinder is attached to a limiting block, a T-shaped inserting rod is arranged on the limiting block in a penetrating mode, first through holes are formed in the top and the bottom of the hollow cylinder, second through holes are formed in the top and the bottom of the sliding block in a jointly, blind holes are formed in the bottom of the inner cavity of the sliding groove close to the left side and the right side, the bottom of the T-shaped inserting rod penetrates through the adjacent first through holes and the second through holes and is inserted into the inner cavity of the adjacent blind holes, the top of the T-shaped inserting rod extends to the top of the hollow cylinder, a first spring is sleeved on the outer side of the T-shaped inserting rod, and the upper end and the lower end of the first spring are fixedly connected with the top and the limiting block of the inner cavity of the hollow cylinder respectively.

In one embodiment, the top of gas vent is equipped with the fixed slot, just the bottom of fixed slot and the top fixed connection of box, the inner chamber of fixed slot is from last first filter screen, foam-rubber cushion, dry layer and the second filter screen of fixedly connected with respectively down.

In one embodiment, the laminating of the right side of discharge gate is equipped with L shape baffle, the right side of box is close to top department fixedly connected with first connecting plate, just the square hole has been seted up on the first connecting plate, square hole inner chamber runs through and is equipped with the T shape square pole that matches with it each other, just the bottom and the top fixed connection of L shape baffle of T shape square pole, the outside cover of T shape square pole is equipped with the second spring, just the upper and lower both ends of second spring respectively with first connecting plate and L shape baffle fixed connection.

In one embodiment, the material homogenizing mechanism comprises a swinging plate, the swinging plate is located at the position, close to the top, of the inner cavity of the box body, a rotating shaft is jointly penetrated and arranged at the position, close to the left side, of the front side and the rear side of the swinging plate, the front end and the rear end of the rotating shaft are respectively connected with the front side and the rear side of the inner cavity of the box body in a rotating mode, the outer side wall of the rotating shaft is close to the front end, a driven bevel gear is fixedly sleeved on the outer side wall of the rotating shaft, the left side of the driven bevel gear is meshed with a transmission bevel gear, the center of the left side of the transmission bevel gear is fixedly connected with a rotating rod, the left side of the box body is close to the top and is fixedly connected with a first bearing, the left end of the rotating rod penetrates through the inner cavity of the first bearing and is fixedly connected with a first single-grooved pulley, the left side of the box body is close to the bottom and is fixedly connected with a support, a first servo motor is fixedly arranged at the right side of the support, a double-grooved pulley is fixedly connected with a first belt between the power output end of the first servo motor and the first single-grooved pulley, and the first single-grooved pulley is in a transmission mode.

In one embodiment, the stirring mechanism comprises three stirring shafts, the three stirring shafts are all located at the bottom of an inner cavity of the box body, three second bearings are fixedly connected to the bottom of the box body from left to right, the bottom ends of the stirring shafts respectively penetrate through the inner cavities of the adjacent second bearings and are fixedly connected with driven bevel gears, the bottoms of the driven bevel gears are meshed with driving bevel gears, the circle centers of the driving bevel gears are jointly penetrated with a transmission rod, a second connecting plate is fixedly connected to the left side of the bottom of the box body, a third bearing is fixedly connected to the second connecting plate, the left end of the transmission rod penetrates through the inner cavity of the third bearing and is fixedly connected with a second single sheave, a second belt is arranged between the double sheaves and the second single sheave, the outer side walls of the stirring shafts are fixedly connected with a plurality of stirring rods through the second belt.

In one embodiment, the turnover mechanism comprises a U-shaped plate, the U-shaped plate is sleeved at the bottom of the box, the middle positions of the front side and the rear side of the box are fixedly connected with rotating shafts, the front side and the rear side of the U-shaped plate are close to the top and are fixedly connected with fourth bearings, the front side of the U-shaped plate is close to the top and is fixedly connected with a bearing plate, the top of the bearing plate is fixedly provided with a second servo motor, the rear end of the rotating shaft at the rear side penetrates through the inner cavities of the adjacent fourth bearings, and the front end of the rotating shaft at the front side penetrates through the inner cavities of the adjacent fourth bearings and is fixedly connected with the power output end of the second servo motor.

The beneficial effects provided by the utility model are as follows:

1. the first single-groove wheel is driven to rotate forward and backward through the first servo motor, the first single-groove wheel is driven to rotate forward and backward through the first belt, the first single-groove wheel rotates forward and backward to drive the rotating rod to rotate forward and backward through the meshing of the transmission bevel gear and the driven bevel gear, so that the swinging plate can be driven to swing in a reciprocating manner, after a worker pours pharmaceutical raw materials into the inner cavity of the box body from the feed hopper and the feed pipe, the raw materials can be evenly thrown to the bottom of the inner cavity of the box body through the reciprocating swing of the swinging plate, so that the uniformity of raw materials spreading is improved, then, the double-groove wheel rotates to drive the second single-groove wheel to rotate through the second belt, the second single-groove wheel rotates to drive the transmission rod to rotate, a plurality of stirring shafts are driven to rotate through the meshing of the plurality of driving bevel gears and the driven bevel gears, and the plurality of stirring shafts rotate to drive the adjacent stirring rods to stir the raw materials rapidly, and the drying efficiency of the pharmaceutical raw materials is further improved.

2. Can drive the axis of rotation of front side rotatory through starting second servo motor, the right side that the axis of rotation was rotatory can drive the box overturns downwards to can gather the pharmacy raw materials of box inner chamber in discharge gate department, and when the staff promotes L shape baffle and overcomes the resistance upward movement of second spring, can discharge the pharmacy raw materials after drying from the box fast, improved the convenience of ejection of compact.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a right side view of the U-shaped plate of the component of the present utility model;

FIG. 3 is an enlarged view of FIG. 1 at A;

fig. 4 is an enlarged view at B in fig. 1.

In the attached drawings, 1, a box body; 2. a feed pipe; 3. a feed hopper; 4. a dust-proof plate; 5. a heat-generating flat plate; 6. a swinging plate; 7. a first servo motor; 8. a double sheave; 9. a primary single sheave; 10. a second single sheave; 11. a stirring shaft; 12. a stirring rod; 13. a passive bevel gear; 14. a driving bevel gear; 15. an L-shaped baffle; 16. t-shaped square rod; 17. a second spring; 18. a fixing groove; 19. a first filter screen; 20. a sponge cushion; 21. drying the layer; 22. a second filter screen; 23. a U-shaped plate; 24. a rotating shaft; 25. a second servo motor; 26. a hollow cylinder; 27. a limiting block; 28. a T-shaped insert rod; 29. a first spring; 30. a rotating shaft; 31. a driven bevel gear; 32. a drive bevel gear; 33. a rotating rod; 34. a transmission rod.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The technical solution of the present utility model will be further described below with reference to the accompanying drawings of the embodiments of the present utility model, and the present utility model is not limited to the following specific embodiments.

It should be understood that the same or similar reference numerals in the drawings of the embodiments correspond to the same or similar components. In the description of the present utility model, it should be understood that, if there are terms such as "upper", "lower", "front", "rear", "left", "right", "top", "bottom", etc., that indicate an azimuth or a positional relationship based on the directions or the positional relationships shown in the drawings, it is only for convenience of describing the present utility model and simplifying the description, but not for indicating or suggesting that the apparatus or element to be referred to must have a specific azimuth, be constructed and operated in a specific azimuth, so that the terms describing the positional relationship in the drawings are merely for exemplary illustration and should not be construed as limitations of the present patent, and that the specific meanings of the terms described above may be understood by those skilled in the art according to specific circumstances.

In one embodiment, as shown in fig. 1, fig. 2, fig. 3 and fig. 4, a pharmaceutical dryer comprises a box body 1, a discharge hole is formed in the bottom of the right side of the box body 1, an L-shaped baffle 15 is attached to the right side of the discharge hole, a first connecting plate is fixedly connected to the right side of the box body 1, square holes are formed in the first connecting plate, a T-shaped square rod 16 matched with the square holes is penetrated through the square holes, the bottom end of the T-shaped square rod 16 is fixedly connected with the top of the L-shaped baffle 15, a second spring 17 is sleeved on the outer side of the T-shaped square rod 16, the upper end and the lower end of the second spring 17 are fixedly connected with the first connecting plate and the L-shaped baffle 15 respectively, the sealing performance of the machine is improved, a feeding pipe 2 is inserted in the position of the top of the box body 1 near the left side, a feeding hopper 3 is fixedly connected to the top of the feeding pipe 2, a dustproof mechanism is arranged on the top of the feeding hopper 3, an exhaust port is formed in the position near the right side of the box body 1, heating flat plates 5 are fixedly arranged on the left and right sides of the inner cavity of the box body 1, a fixing groove 18 is formed in the top of the exhaust port, a filter pad 18 is fixedly connected with the inner cavity 20, a filter pad is fixedly arranged on the bottom of the box body 1, and the filter pad is fixedly connected with the bottom layer 1, and the filter pad is fixedly arranged on the bottom of the box body 1, and the filter pad is fixedly connected to the bottom layer 1, and the bottom layer is arranged on the bottom of the filter pad, and the filter pad is 20, and the filter pad is fixed to be connected to the bottom inside the bottom layer, and the filter pad is 20 and the bottom layer is respectively;

the dustproof mechanism comprises a dustproof plate 4, the dustproof plate 4 is attached to the top of the feed hopper 3, the right side of the dustproof plate 4 is fixedly connected with a hollow cylinder 26, the bottom of the hollow cylinder 26 is fixedly connected with a sliding block, the top of the box body 1 is close to the left side, a sliding groove is formed in the inner cavity of the sliding groove in a movable mode, a limiting block 27 is attached to the inner cavity of the hollow cylinder 26, a T-shaped inserting rod 28 is arranged on the limiting block 27 in a penetrating mode, first through holes are formed in the top and the bottom of the hollow cylinder 26, second through holes are formed in the top and the bottom of the sliding groove in a jointly penetrating mode, blind holes are formed in the inner cavity bottom of the sliding groove close to the left side and the right side, the bottom of the T-shaped inserting rod 28 penetrates through the adjacent first through holes and the second through holes and is inserted into the inner cavity of the adjacent blind holes, a first through hole is formed in the top of the T-shaped inserting rod 28, the outer side of the T-shaped inserting rod 28 is sleeved with a first spring 29, the upper end and the lower end of the first spring 29 are respectively fixedly connected with the top of the inner cavity of the hollow cylinder 26 and the limiting block 27, and the outer dust is prevented from entering the inner cavity of the box body 1 through the feed hopper 3, and the neatness of pharmaceutical equipment is improved;

the material homogenizing mechanism comprises a swinging plate 6, the swinging plate 6 is positioned at the position, close to the top, of the inner cavity of the box body 1, a rotating shaft 30 is jointly penetrated and arranged at the position, close to the left, of the front side and the rear side of the swinging plate 6, the front end and the rear end of the rotating shaft 30 are respectively in rotary connection with the front side and the rear side of the inner cavity of the box body 1, a driven bevel gear 31 is fixedly sleeved on the outer side wall of the rotating shaft 30, the left side of the driven bevel gear 31 is meshed with a transmission bevel gear 32, a rotating rod 33 is fixedly connected to the center of the left side of the transmission bevel gear 32, a first bearing is fixedly connected to the position, close to the top, of the left side of the box body 1, the left end of the rotating rod 33 penetrates through the inner cavity of the first bearing and is fixedly connected with a first single sheave 9, a bracket is fixedly connected to the position, close to the left side of the box body 1, a first servo motor 7 is fixedly arranged on the right side of the bracket, a double-grooved wheel 8 is fixedly connected to the power output end of the first servo motor 7, a first belt is arranged between the double-grooved wheel 8 and the first single sheave 9, and the double-grooved wheel 8 is connected through the first belt, so that drying efficiency is improved;

the stirring mechanism comprises three stirring shafts 11, the three stirring shafts 11 are all positioned at the bottom of an inner cavity of the box body 1, three second bearings are fixedly connected to the bottom of the box body 1 from left to right, the bottom ends of the three stirring shafts 11 respectively penetrate through the inner cavities of the adjacent second bearings and are fixedly connected with driven conical gears 13, the bottoms of the three driven conical gears 13 are all meshed with driving conical gears 14, a transmission rod 34 is jointly penetrated through the circle centers of the three driving conical gears 14, a second connecting plate is fixedly connected to the left side of the bottom of the box body 1, a third bearing is fixedly connected to the second connecting plate, the left end of the transmission rod 34 penetrates through the inner cavity of the third bearing and is fixedly connected with a second single sheave 10, a second belt is arranged between the double sheave 8 and the second single sheave 10, the double sheaves 8 are in transmission connection with the second single sheave 10 through the second belt, the outer side walls of the three stirring shafts 11 are fixedly connected with a plurality of stirring rods 12, and the drying efficiency is further improved;

the tilting mechanism includes U-shaped plate 23, and U-shaped plate 23 cover establishes in the bottom of box 1, the equal fixedly connected with axis of rotation 24 of both sides intermediate position department around the box 1, the equal fixedly connected with fourth bearing of both sides department near the top around the U-shaped plate 23, the front side of U-shaped plate 23 is close to top department fixedly connected with bearing plate, and the top fixed mounting of bearing plate has second servo motor 25, the rear end that is located axis of rotation 24 of rear side runs through adjacent fourth bearing inner chamber, the front end that is located axis of rotation 24 of front side runs through adjacent fourth bearing inner chamber, and with the power take off end fixed connection of second servo motor 25, improve the convenience of ejection of compact.

Working principle: when the utility model is used, firstly, the first servo motor 7 is started to drive the double grooved pulley 8 to rotate forward and backward, the first single grooved pulley 9 can be driven to rotate forward and backward through the first belt, the first single grooved pulley 9 rotates forward and backward to drive the rotating rod 33 to rotate forward and backward, and the rotating shaft 30 is driven to rotate forward and backward through the meshing of the transmission bevel gear 32 and the driven bevel gear 31, so that the swinging plate 6 can be driven to swing reciprocally, then, the T-shaped inserted rod 28 is pulled to move upwards, the bottom end of the T-shaped inserted rod 28 is separated from the inner cavity of the blind hole at the left side, then, the hollow cylinder 26 is pushed to move rightwards, the dust-proof plate 4 is driven to separate from the top of the feed hopper 3, and when a worker pours pharmaceutical raw materials into the inner cavity of the box body 1 from the feed hopper 3 and the feed pipe 2, the raw materials can be evenly thrown to the bottom of the inner cavity of the box body 1 through the reciprocal swinging of the swinging plate 6, so that the raw material spreading uniformity is improved, then, the double grooved pulley 8 rotates to drive the second single grooved pulley 10 to rotate through the second belt, the second single grooved pulley 10 rotates to drive the transmission rod 34 to rotate, and the plurality of stirring shafts 11 are driven to rotate through the meshing of the plurality of driving bevel gears 14 and the driven bevel gears 13, the plurality of stirring shafts 11 rotate to drive the adjacent plurality of stirring rods 12 to rotate, so that the raw materials can be rapidly stirred, the drying efficiency of the pharmaceutical raw materials is further improved, the raw materials can be heated through the work of the two heating flat plates 5, the water vapor generated by heating can be discharged through the exhaust ports, and the water vapor can be filtered and dried and then discharged through the arrangement of the first filter screen 19, the foam-rubber cushion 20, the drying layer 21 and the second filter screen 22, so that the effect of preventing environmental pollution is achieved, after the drying of the pharmaceutical raw materials is completed, the first servo motor 7 and the heating flat plates 5 are closed, then, the second servo motor 25 is started to drive the front rotating shaft 24 to rotate, the rotating shaft 24 rotates to drive the right side of the box body 1 to overturn downwards, so that the pharmaceutical raw materials in the inner cavity of the box body 1 can be gathered at the discharge port, and when a worker pushes the L-shaped baffle 15 to overcome the resistance of the second spring 17 to move upwards, the dried pharmaceutical raw materials can be rapidly discharged from the box body 1, and the convenience of discharging is improved.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. The utility model provides a pharmacy desiccator, its characterized in that, including the box, just the discharge gate has been seted up to the right side bottom department of box, the top of box is close to left side department and is pegged graft there is the inlet pipe, just the top fixedly connected with feeder hopper of inlet pipe, the top of feeder hopper is equipped with dustproof mechanism, the top of box is close to right side department and has seted up the gas vent, just the equal fixed mounting in inner chamber left and right sides of box has the flat board that generates heat, the inner chamber of box is close to top department and is equipped with the samming mechanism, the inner chamber bottom of box is equipped with rabbling mechanism, the outside of box is equipped with tilting mechanism.

2. The pharmaceutical dryer according to claim 1, wherein the dustproof mechanism comprises a dustproof plate, the dustproof plate is attached to the top of the feed hopper, the right side of the dustproof plate is fixedly connected with a hollow cylinder, the bottom of the hollow cylinder is fixedly connected with a sliding block, the top of the box body is close to the left side, a sliding groove is formed in the position, which is close to the left side, of the box body, the sliding block is movably connected to the inner cavity of the sliding groove, a limiting block is attached to the inner cavity of the hollow cylinder, a T-shaped inserting rod penetrates through the limiting block, first through holes are formed in the top and the bottom of the hollow cylinder, second through holes are formed in the top and the bottom of the sliding block, blind holes are formed in the bottom of the inner cavity of the sliding groove close to the left side and the right side, the bottom of the T-shaped inserting rod penetrates through the adjacent first through holes and extends to the top of the hollow cylinder, a first spring is sleeved on the outer side of the T-shaped inserting rod, and the upper end and the lower end of the first spring are respectively connected with the inner cavity of the limiting block and the inner cavity of the fixed connection.

3. The pharmaceutical dryer according to claim 1, wherein a fixing groove is formed in the top of the air outlet, the bottom of the fixing groove is fixedly connected with the top of the box body, and the inner cavity of the fixing groove is fixedly connected with a first filter screen, a foam-rubber cushion, a drying layer and a second filter screen from top to bottom respectively.

4. The pharmaceutical dryer according to claim 1, wherein the right side of the discharge hole is provided with an L-shaped baffle plate in a fitting manner, a first connecting plate is fixedly connected to the right side of the box body close to the top, a square hole is formed in the first connecting plate, a T-shaped square rod matched with the square hole is arranged in an inner cavity of the square hole in a penetrating manner, the bottom end of the T-shaped square rod is fixedly connected with the top of the L-shaped baffle plate, a second spring is sleeved on the outer side of the T-shaped square rod, and the upper end and the lower end of the second spring are fixedly connected with the first connecting plate and the L-shaped baffle plate respectively.

5. The pharmaceutical dryer according to claim 1, wherein the material homogenizing mechanism comprises a swinging plate, the swinging plate is located at the position, close to the top, of the inner cavity of the box body, a rotating shaft is jointly penetrated and arranged at the position, close to the left, of the front side and the rear side of the swinging plate, the front end and the rear end of the rotating shaft are respectively connected with the front side and the rear side of the inner cavity of the box body in a rotating mode, a driven bevel gear is fixedly sleeved at the position, close to the front end, of the outer side wall of the rotating shaft, a transmission bevel gear is meshed with the left side of the driven bevel gear, a rotating rod is fixedly connected with the center of the left side of the transmission bevel gear, a first bearing is fixedly connected at the position, close to the top, of the left side of the box body, a first single grooved wheel is fixedly connected with a support, the left side of the box body is fixedly connected with a first servo motor, the power output end of the first servo motor is fixedly connected with a double grooved wheel, a first belt wheel is arranged between the double grooved wheel and the first single grooved wheel, and the first single grooved wheel is connected with the first belt wheel through the first single belt.

6. The pharmaceutical dryer according to claim 5, wherein the stirring mechanism comprises three stirring shafts, the three stirring shafts are all located at the bottom of an inner cavity of the box body, the bottom of the box body is fixedly connected with three second bearings from left to right, the bottom ends of the three stirring shafts respectively penetrate through the inner cavities of adjacent second bearings and are fixedly connected with driven bevel gears, the bottoms of the three driven bevel gears are meshed with driving bevel gears, the circle centers of the three driving bevel gears are jointly penetrated with a transmission rod, the left side of the bottom of the box body is fixedly connected with a second connecting plate, the second connecting plate is fixedly connected with a third bearing, the left end of the transmission rod penetrates through the inner cavity of the third bearing and is fixedly connected with a second single sheave, a second belt is arranged between the double sheaves and the second single sheave, the double sheaves and the second single sheave are in transmission connection through the second belt, and the outer side walls of the three stirring shafts are fixedly connected with a plurality of stirring rods.

7. The pharmaceutical dryer according to claim 1, wherein the turnover mechanism comprises a U-shaped plate, the U-shaped plate is sleeved at the bottom of the box, rotation shafts are fixedly connected to middle positions of the front side and the rear side of the box, fourth bearings are fixedly connected to middle positions of the front side and the rear side of the U-shaped plate, which are close to the top, of the U-shaped plate, a bearing plate is fixedly connected to the middle position of the front side, which is close to the top, of the U-shaped plate, a second servo motor is fixedly arranged at the top of the bearing plate, the rear end of the rotation shaft located at the rear side penetrates through the inner cavity of the adjacent fourth bearings, and the front end of the rotation shaft located at the front side penetrates through the inner cavity of the adjacent fourth bearings and is fixedly connected with the power output end of the second servo motor.