CN211562724U - Inclinable double-pot countercurrent mixer - Google Patents

Abstract

The utility model provides a tiltable double-pot countercurrent mixer, which comprises a frame and a double-pot mixer, wherein the frame is provided with a lower pot body driving component for driving a lower pot body to rotate and an upper pot body driving component for driving an upper pot body to rotate; an upper layer lifting mechanism is arranged at one end of the upper layer pot body and one end of the upper layer rotating shaft, and the other end of the upper layer pot body and the other end of the upper layer rotating shaft are hinged with the rack. The utility model can make the material mixing more uniform through the reverse rotation of the pot body and the rotating shaft; one end through the upper elevating system drive upper pot body and upper pivot upwards rises, the other end is rotating for the frame under articulated effect for the upper pot body inclines together with the upper pivot, and it is internal to be convenient for empty the material that the internal wet of upper pot was mixed evenly into lower floor's pot, and when wasing, the upper pot body slope is convenient for discharge sewage behind the sanitization.

Description

Inclinable double-pot countercurrent mixer

Technical Field

The utility model relates to the technical field of machinery, especially, relate to a tiltable double-pot countercurrent blendor.

Background

The double-pot mixer adopts a double-pot structure, wet mixing and dry mixing are respectively completed in two pots, linkage is realized, the problems that the traditional mixing equipment is inconvenient to stick and clear the pot, formed materials do not generate heat, the quality of the mixed finished materials is stable, the looseness and the formability are good, particle segregation is not generated when the materials with different specific gravity and different particle sizes are mixed, the particles are not extruded and ground, and the double-pot mixer is ideal equipment for forming powder resin.

However, the existing double-pot mixer only depends on the upper-layer rotating shaft, the lower-layer rotating shaft and the mixing scraper on the upper-layer rotating shaft for mixing, the mixing effect is not ideal, and the horizontal double-pot mixer cannot be inclined so that materials can be poured out quickly.

Disclosure of Invention

To foretell technical problem, the utility model provides a tiltable double-pot mixer against current for solve the problem that the double-pot mixer among the prior art can not incline and pour the material.

In order to achieve the above purpose, the technical solution of the present invention is realized as follows:

a tiltable double-pot countercurrent mixer comprises a rack and a double-pot mixer arranged on the rack, wherein the double-pot mixer comprises a lower-layer pot body, a lower-layer rotating shaft driving part, an upper-layer pot body, an upper-layer rotating shaft and an upper-layer rotating shaft driving part, mixing scrapers are uniformly distributed on the lower-layer rotating shaft and the upper-layer rotating shaft, the lower-layer pot body is provided with a lower-layer discharge hole and a lower-layer feed hole, the upper-layer pot body is provided with an upper-layer discharge hole and an upper-layer feed hole, the upper-layer discharge hole corresponds to the lower-layer feed hole, and a lower-layer pot body driving component for driving; an upper layer lifting mechanism is arranged at one end of the upper layer pot body and one end of the upper layer rotating shaft, and the other end of the upper layer pot body and the other end of the upper layer rotating shaft are hinged with the rack.

Furthermore, one end of the upper-layer pot body and one end of the upper-layer rotating shaft are provided with an upper-layer left bearing seat, and the other end of the upper-layer pot body and the upper-layer rotating shaft are provided with an upper-layer right bearing seat; the upper left bearing seat and the upper right bearing seat comprise an upper bearing shell, an upper inner ring bearing and an upper outer ring bearing, the upper inner ring bearing and the upper outer ring bearing are arranged in the upper bearing shell, the upper rotating shaft is rotatably connected in the upper inner ring bearing, the upper pot body is rotatably connected between the upper inner ring bearing and the upper outer ring bearing through an upper sleeve, and the rotating axis of the upper pot body coincides with the rotating axis of the upper rotating shaft. Furthermore, the left end of the upper layer rotating shaft is connected with an upper layer rotating shaft driving piece, an upper layer lifting plate is arranged on an upper layer left bearing seat and the upper layer rotating shaft driving piece, the upper layer lifting mechanism comprises an upper layer lifting driving piece, one end of the upper layer lifting driving piece is fixed with the rack, and the other end of the upper layer lifting driving piece is hinged with the upper layer lifting plate through an upper layer lifting hinge seat; the upper layer right bearing seat is hinged with the rack through an upper layer right hinge seat.

Further, upper pot body drive assembly includes upper driving gear, upper driven gear and drive upper driving gear pivoted upper gear driving piece, upper gear driving piece is fixed on upper right bearing frame, upper gear driving piece output and upper driving gear connection, upper driving gear and upper driven gear meshing connection, upper driven gear with upper sleeve fixed connection.

Furthermore, one end of the lower pot body and one end of the lower rotating shaft are provided with a lower lifting mechanism, and the other end of the lower pot body and the other end of the lower rotating shaft are hinged with the rack.

Furthermore, one end of the lower pot body and one end of the lower rotating shaft are provided with a lower left bearing seat, and the other end of the lower pot body and the lower rotating shaft are provided with a lower right bearing seat; the lower layer left bearing seat and the lower layer right bearing seat comprise a lower layer bearing shell, a lower layer inner ring bearing and a lower layer outer ring bearing, the lower layer inner ring bearing and the lower layer outer ring bearing are arranged in the lower layer bearing shell, the lower layer rotating shaft is rotatably connected in the lower layer inner ring bearing, the lower layer pot body is rotatably connected between the lower layer inner ring bearing and the lower layer outer ring bearing through the lower layer sleeve, and the rotating axis of the lower layer pot body is superposed with the rotating axis of.

Furthermore, the left end of the lower layer rotating shaft is connected with a lower layer rotating shaft driving piece, a lower layer lifting plate is arranged on a lower layer right bearing seat and the lower layer rotating shaft driving piece, the lower layer lifting mechanism comprises a lower layer lifting driving piece, one end of the lower layer lifting driving piece is fixed with the rack, and the other end of the lower layer lifting driving piece is hinged with the lower layer lifting plate through a lower layer lifting hinge seat; the lower-layer left bearing seat is hinged with the rack through a lower-layer left hinge seat.

Further, pot body drive assembly of lower floor includes lower floor's driving gear, lower floor's driven gear and drive lower floor's driving gear pivoted lower floor's gear drive spare, lower floor's gear drive spare is fixed on lower floor's left bearing frame, lower floor's gear drive spare output and lower floor's driving gear connection, lower floor's driving gear and lower floor's driven gear meshing connection, lower floor's driven gear with lower floor's sleeve fixed connection.

The utility model has the advantages that: according to the invention, the material mixing is more uniform through the reverse rotation of the pot body and the rotating shaft; one ends of the upper pot body and the upper rotating shaft are driven to rise upwards through the upper lifting mechanism, and the other ends of the upper pot body and the upper rotating shaft rotate relative to the rack under the hinging action, so that the upper pot body and the upper rotating shaft are inclined together, the materials which are uniformly wet and mixed in the upper pot body are poured into the lower pot body conveniently, and in the cleaning process, the upper pot body is inclined, so that sewage is discharged after the upper pot body is cleaned; one end of the lower pot body and the lower rotating shaft driven by the lower lifting mechanism is upwards lifted, and the other end of the lower pot body rotates relative to the rack under the hinging action, so that the lower pot body and the upper rotating shaft are inclined together, the material uniformly mixed in the lower pot body is poured into the collecting container, and when the lower pot body is cleaned, the lower pot body is inclined, and the sewage is discharged after the lower pot body is cleaned.

Drawings

In order to more clearly illustrate the embodiments of the present 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, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention.

As shown in figure 1, the utility model relates to a tiltable double-pot counter-current mixer, which comprises a frame 1 and a double-pot mixer arranged on the frame 1, the double-pot mixer comprises a lower pot body 2, a lower layer rotating shaft 6 arranged in the lower layer pot body 2, a lower layer rotating shaft driving piece 22 driving the lower layer rotating shaft 6 to rotate, an upper layer pot body 15 arranged on the frame 1, an upper layer rotating shaft 26 arranged in the upper layer pot body 15 and an upper layer rotating shaft driving piece 13 driving the upper layer rotating shaft 26 to rotate, mixing scrapers 28 are uniformly distributed on the lower layer rotating shaft 6 and the upper layer rotating shaft 26, the lower layer pot body 2 is provided with a lower layer discharge hole and a lower layer feed inlet with cover plates, the upper layer pot body 15 is provided with an upper layer discharge hole and an upper layer feed inlet with cover plates, the upper, the machine frame 1 is provided with a lower pot body driving component for driving the lower pot body 2 to rotate and an upper pot body driving component for driving the upper pot body 15 to rotate; one end of the upper pot body 15 and the upper rotating shaft 26 is provided with an upper lifting mechanism, the other ends of the upper pot body 15 and the upper rotating shaft 26 are hinged with the rack 1, the upper pot body 15 and the upper rotating shaft 26 can rotate around the hinge point in the vertical direction, and an upper discharge port of the upper pot body 15 is arranged at the lower side of one end, close to the hinge point, of the upper pot body 15. Specifically, the upper-layer rotating shaft driving part 13 comprises an upper-layer rotating shaft driving motor, the upper-layer rotating shaft driving motor is connected with the left end of the upper-layer rotating shaft 26 through a speed reducer and is used for driving the upper-layer rotating shaft 26 to rotate, a sealing ring is arranged between the upper-layer pot body 15 and the upper-layer rotating shaft 26, and the upper-layer pot body driving component drives the upper-layer pot body 15 and the upper-layer rotating shaft 26 to rotate reversely; lower floor's pivot driving piece 22 includes lower floor's pivot driving motor, and lower floor's pivot driving motor passes through the speed reducer to be connected with the left end of lower floor's pivot 6 for drive lower floor's pivot 6 rotates, sets up the sealing washer between lower floor's pot body 2 and lower floor's pivot 6, and lower floor's pot body drive assembly drive lower floor's pot body 2 and lower floor's pivot 6 reverse rotation. According to the invention, the double pots are adopted to facilitate wet mixing and dry mixing to be respectively completed in the two pots, wet mixing is completed in the upper pot body 15, dry mixing is completed in the lower pot body 2, and mixing is more uniform through the reverse rotation of the pot bodies and the rotating shaft; when the upper pot body and the lower pot body are controlled to stop rotating by the controller, the upper layer feed port of the upper pot body faces upwards, the upper layer discharge port faces right below, the lower layer feed port of the lower pot body faces upwards and directly faces the upper layer discharge port, and the lower layer discharge port faces right below; one end through upper elevating system drive upper pot body 15 and upper pivot 26 upwards rises, the other end of upper pot body 15 and upper pivot 26 is rotating for frame 1 simultaneously, make upper pot body 15 and upper pivot 26 slope together, be convenient for empty into lower floor's pot body 2 with the interior wet even material of mixing of upper pot body 15, and simultaneously, upper pivot driving motor can continue the compounding scraper 28 in the work drive upper pot body 15, be convenient for scrape the material that glues on the 15 walls of upper pot body, do benefit to and empty into in the lower floor's pot body 2. And when cleaning, the upper pot body 15 is inclined to be convenient for cleaning and then discharging sewage.

Furthermore, one end of the upper-layer pot body 15 and one end of the upper-layer rotating shaft 26 are provided with an upper-layer left bearing seat 14, and the other end of the upper-layer pot body and the upper-layer rotating shaft are provided with an upper-layer right bearing seat 18; the upper left bearing seat 14 and the upper right bearing seat 18 both comprise an upper bearing shell, an upper inner ring bearing and an upper outer ring bearing, the upper rotating shaft 26 is rotatably connected in the upper inner ring bearing, the upper pot body 15 is rotatably connected between the upper inner ring bearing and the upper outer ring bearing through an upper sleeve 27, and the rotating axis of the upper pot body 15 coincides with the rotating axis of the upper rotating shaft 26. The inner and outer double-layer bearings of the upper-layer inner ring bearing and the upper-layer outer ring bearing are arranged to enable the upper-layer pot body 15 and the upper-layer rotating shaft 26 to rotate relatively.

Furthermore, an upper layer rotating shaft driving part 13 is connected with the left end of an upper layer rotating shaft 26, an upper layer lifting plate 12 is arranged on the lower sides of an upper layer left bearing seat 14 and the upper layer rotating shaft driving part 13, the upper layer lifting mechanism comprises an upper layer lifting driving part 10, one end of the upper layer lifting driving part 10 is fixed with the rack 1, and the other end of the upper layer lifting driving part 10 is hinged with the upper layer lifting plate 12 through an upper layer lifting hinge seat 11; the upper layer right bearing seat 18 is hinged with the frame 1 through an upper layer right hinge seat 19. In this embodiment, the upper layer lifting driving member 10 is a hydraulic cylinder, a fixed end of the hydraulic cylinder is fixed on the left side of the frame 1, a movable end of the hydraulic cylinder faces upward and an upper layer lifting hinge seat 11 is fixed on an upper end of the movable end, a horizontal left hinge shaft is fixed on a lower side of the upper layer lifting plate 12, the hinge shaft is rotatably connected to the upper layer lifting hinge seat 11 through two ends, so that the hydraulic cylinder drives the left ends of the upper layer left bearing seat 14 and the upper layer rotating shaft driving member 13 to lift when pushing the upper layer lifting hinge seat 11, and the upper layer left bearing seat 14 and the upper layer rotating shaft driving member 13 can rotate up and down to a certain extent relative to the upper layer lifting hinge seat 11, and an upper layer right hinge seat 19 is fixed on the right side of the frame 1, two sides of the upper layer right bearing seat 18 are rotatably connected to the upper layer lifting hinge seat 11 through the horizontal right hinge shaft, so that, the upper layer rotating shaft 26 and the upper layer pot body 15 can rotate around the right hinged shaft to generate inclination, so that the materials can be poured conveniently.

Further, the upper pot body driving assembly comprises an upper driving gear 16, an upper driven gear 20 and an upper gear driving part 17 for driving the upper driving gear 16 to rotate, the upper gear driving part 17 is fixed on an upper right bearing seat 18, the output end of the upper gear driving part 17 is connected with the upper driving gear 16, the upper driving gear 16 is meshed with the upper driven gear 20, and the upper driven gear 20 is fixedly connected with the upper sleeve 27. Fix the upper backup pad on upper right bearing frame 18, fixed upper gear driving 17 in the upper backup pad, upper gear driving 17 includes upper gear driving motor, upper gear driving motor passes through the speed reducer and is connected with upper driving gear 16, upper driven gear 20 is connected in the meshing of upper driving gear 16 downside, upper driven gear 20 and upper sleeve 27 coaxial fixation on upper pot body 15 right side are so that when upper gear driving motor drives upper driving gear 16 and rotates, drive upper pot body 15 through upper driven gear 20 and rotate, and this upper pot body 15's direction of rotation is opposite with upper pivot 26's direction of rotation, make the material mixing of upper pot body 15 more quick more even.

Furthermore, one end of the lower pot body 2 and one end of the lower rotating shaft 6 are provided with a lower lifting mechanism, and the other end of the lower pot body 2 and the other end of the lower rotating shaft 6 are hinged with the frame 1. One end through lower floor's elevating system drive lower floor's the pot body 2 and lower floor's pivot 6 upwards rises, because the other end of lower floor's pot body 2 and lower floor's pivot 6 is articulated with frame 1, then lower floor's pot body 2 and lower floor's pivot 6 rotate for frame 1 round this pin joint, make the lower floor's pot body 2 and upper pivot 6 slope together, be convenient for empty into collection container with the even material of dry mixing in the lower floor's pot body 2 in, and simultaneously, lower floor's pivot driving motor can continue the interior compounding scraper 28 rotation of the pot body 2 of work drive lower floor, be convenient for scrape the material that glues on the 2 walls of the pot body of lower floor, do. And when cleaning, the lower pot body 2 is inclined to be convenient for cleaning and then discharging sewage.

Furthermore, one end of the lower-layer pot body 2 and one end of the lower-layer rotating shaft 6 are provided with a lower-layer left bearing seat 5, and the other end of the lower-layer pot body and the lower-layer rotating shaft are provided with a lower-layer right bearing seat 21; lower floor's left bearing frame 5 and lower floor's right bearing frame 21 all include lower floor's bearing housing, set up lower floor's inner circle bearing and lower floor's outer lane bearing in lower floor's bearing housing, and lower floor's pivot 6 rotates to be connected in lower floor's inner circle bearing, and the lower floor's pot body 2 rotates through lower floor's sleeve 3 to be connected between lower floor's inner circle bearing and lower floor's outer lane bearing, and the axis of rotation of the lower floor's pot body 2 and the. The inner and outer double-layer bearings of the lower-layer inner ring bearing and the lower-layer outer ring bearing are arranged to enable the lower-layer pot body 2 and the lower-layer rotating shaft 6 to rotate relatively.

Further, a lower-layer rotating shaft driving piece 22 is connected with the right end of the lower-layer rotating shaft 6, a lower-layer lifting plate 23 is arranged on the lower sides of the lower-layer right bearing seat 21 and the lower-layer rotating shaft driving piece 22, the lower-layer lifting mechanism comprises a lower-layer lifting driving piece 25, one end of the lower-layer lifting driving piece 25 is fixed with the rack 1, and the other end of the lower-layer lifting driving piece 25 is hinged with the lower-layer lifting plate 23 through; the lower-layer left bearing seat 5 is hinged with the rack 1 through a lower-layer left hinge seat 4. In this embodiment, the lower layer lifting driving member 25 is a hydraulic cylinder, a fixed end of the hydraulic cylinder is fixed on the right side of the frame 1, a movable end of the hydraulic cylinder faces upward and a lower layer lifting hinge seat 24 is fixed on an upper end of the movable end, a horizontal right hinge shaft is fixed on a lower side of the lower layer lifting plate 23, the right hinge shaft is rotatably connected to the lower layer lifting hinge seat 24 through two ends, so that when the hydraulic cylinder pushes the lower layer lifting hinge seat 24, the lower layer right bearing seat 21 and the right end of the lower layer rotating shaft driving member 22 are driven to lift, and the lower layer right bearing seat 21 and the lower layer rotating shaft driving member 22 can rotate up and down to a certain extent relative to the lower layer lifting hinge seat 24, while the left side of the frame 1 fixes the lower layer left hinge seat 4, two sides of the lower layer left bearing seat 5 are rotatably connected to the lower, thereby lower floor's pivot 6 and lower floor's pot body 2 can rotate round this left articulated shaft and produce the slope, are convenient for empty the material.

Further, pot body drive assembly of lower floor includes lower floor's driving gear 9, lower floor's driven gear 7 and drives lower floor's driving gear 9 pivoted lower floor gear drive piece 8, lower floor's gear drive piece 8 is fixed on lower floor's left bearing frame 5, lower floor's gear drive piece 8 output and lower floor's driving gear 9 are connected, lower floor's driving gear 9 and lower floor's driven gear 7 meshing are connected, lower floor's driven gear 7 with lower floor's sleeve 3 fixed connection. Fixed lower floor's backup pad on lower floor's left bearing frame 5, fixed lower floor's gear drive spare 8 in the backup pad of lower floor, lower floor's gear drive spare 8 includes lower floor's gear drive motor, lower floor's gear drive motor passes through the speed reducer and is connected with lower floor's driving gear 9, lower floor's driving gear 9 downside meshing connects lower floor's driven gear 7, lower floor's driven gear 7 and the 2 left lower floor's sleeve 21 coaxial fixings of lower floor's pot body are in order to make lower floor's gear drive motor drive lower floor's driving gear 9 rotate, it rotates to drive lower floor's pot body 2 through lower floor's driven gear 7, and this lower floor's pot body.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. A tiltable double-pot countercurrent mixer comprises a frame (1) and a double-pot mixer arranged on the frame (1), wherein the double-pot mixer comprises a lower-layer pot body (2), a lower-layer rotating shaft (6), a lower-layer rotating shaft driving part (22), an upper-layer pot body (15), an upper-layer rotating shaft (26) and an upper-layer rotating shaft driving part (13), mixing scrapers (28) are uniformly distributed on the lower-layer rotating shaft (6) and the upper-layer rotating shaft (26), the lower-layer pot body (2) is provided with a lower-layer discharge hole and a lower-layer feed hole, the upper-layer pot body (15) is provided with an upper-layer discharge hole and an upper-layer feed hole, and the upper-layer discharge hole corresponds to the lower-layer feed hole; one end of the upper pot body (15) and one end of the upper rotating shaft (26) are provided with an upper lifting mechanism, and the other end of the upper pot body (15) and the other end of the upper rotating shaft (26) are hinged with the rack (1).

2. The tiltable double-pot counter-flow mixer according to claim 1, wherein one end of the upper pot (15) and the upper rotating shaft (26) is provided with an upper left bearing seat (14), and the other end is provided with an upper right bearing seat (18); upper left bearing frame (14) and upper right bearing frame (18) all include upper bearing housing, upper inner circle bearing and upper outer circle bearing of setting in upper bearing housing, upper pivot (26) rotate to be connected in upper inner circle bearing, the upper pot body (15) rotates through upper sleeve (27) to be connected between upper inner circle bearing and upper outer circle bearing, and the axis of rotation of the upper pot body (15) coincides with the axis of rotation of upper pivot (26).

3. The tiltable double-pot countercurrent mixer according to claim 2, characterized in that the left end of the upper layer rotating shaft (26) is connected with an upper layer rotating shaft driving member (13), an upper layer lifting plate (12) is arranged on the upper layer left bearing seat (14) and the upper layer rotating shaft driving member (13), the upper layer lifting mechanism comprises an upper layer lifting driving member (10), one end of the upper layer lifting driving member (10) is fixed with the frame (1), and the other end is hinged with the upper layer lifting plate (12) through an upper layer lifting hinge seat (11); the upper layer right bearing seat (18) is hinged with the rack (1) through an upper layer right hinge seat (19).

4. The tiltable double-pot countercurrent mixer according to claim 2 or 3, wherein said upper pot driving assembly comprises an upper driving gear (16), an upper driven gear (20) and an upper gear driving member (17) for driving the upper driving gear (16) to rotate, said upper gear driving member (17) is fixed on an upper right bearing seat (18), the output end of said upper gear driving member (17) is connected with the upper driving gear (16), the upper driving gear (16) is engaged with the upper driven gear (20), and the upper driven gear (20) is fixedly connected with said upper sleeve (27).

5. A tiltable double-pot counter-flow mixer according to any of claims 1 to 3, characterized in that one end of the lower pot body (2) and the lower rotary shaft (6) is provided with a lower lifting mechanism, and the other end of the lower pot body (2) and the lower rotary shaft (6) is hinged with the frame (1).

6. The tiltable double-pot counter-flow mixer according to claim 5, characterized in that one end of the lower pot body (2) and the lower rotary shaft (6) is provided with a lower left bearing seat (5), and the other end is provided with a lower right bearing seat (21); lower floor left bearing frame (5) and lower floor right bearing frame (21) all include lower floor's bearing housing, set up lower floor's inner circle bearing and lower floor's outer lane bearing in lower floor's bearing housing, and lower floor's pivot (6) rotate to be connected in lower floor's inner circle bearing, and the lower floor pot body (2) rotate through lower floor sleeve (3) and connect between lower floor's inner circle bearing and lower floor's outer lane bearing, and the axis of rotation of the lower floor pot body (2) coincides with the axis of rotation of lower floor's pivot (6).

7. The tiltable double-pot countercurrent mixer according to claim 6, wherein the left end of the lower layer rotating shaft (6) is connected with a lower layer rotating shaft driving member (22), a lower layer lifting plate (23) is arranged on the lower layer right bearing seat (21) and the lower layer rotating shaft driving member (22), the lower layer lifting mechanism comprises a lower layer lifting driving member (25), one end of the lower layer lifting driving member (25) is fixed with the frame (1), and the other end is hinged with the lower layer lifting plate (23) through a lower layer lifting hinge seat (24); the lower-layer left bearing seat (5) is hinged with the rack (1) through a lower-layer left hinge seat (4).

8. The tiltable double-pot countercurrent mixer according to claim 6 or 7, wherein the lower-layer pot body driving assembly comprises a lower-layer driving gear (9), a lower-layer driven gear (7) and a lower-layer gear driving member (8) for driving the lower-layer driving gear (9) to rotate, the lower-layer gear driving member (8) is fixed on the lower-layer left bearing seat (5), the output end of the lower-layer gear driving member (8) is connected with the lower-layer driving gear (9), the lower-layer driving gear (9) is meshed with the lower-layer driven gear (7), and the lower-layer driven gear (7) is fixedly connected with the lower-layer sleeve (3).

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