CN114027525B

CN114027525B - Convertible has artichoke blade of tiling structure with driping equipment

Info

Publication number: CN114027525B
Application number: CN202111411293.9A
Authority: CN
Inventors: 肖立安; 宋阳力; 刘铃
Original assignee: Aikedao Biological Technology Co ltd
Current assignee: Huai'an Yingke Zhichuang Information Technology Co.,Ltd.
Priority date: 2021-11-25
Filing date: 2021-11-25
Publication date: 2022-10-28
Anticipated expiration: 2041-11-25
Also published as: CN114027525A

Abstract

The invention relates to the technical field of draining for artichoke blades, in particular to a turnover type draining device with a flat-laying structure for artichoke blades. The device comprises an article draining device for draining blade water and a driving device arranged at the bottom of the article draining device and used for driving the article draining device, wherein the article draining device comprises two semi-cylindrical charging shells, and the charging shells are of hollow cavity structures penetrating through the bottoms. According to the invention, the artichoke leaves are tiled through the spreading mechanism, moisture on the artichoke leaves falls through the blocking frame so as to be convenient for controlling and removing the moisture on the artichoke leaves, meanwhile, the spreading mechanism is attached to the guide plate, so that the spreading mechanism positions the positions of the artichoke leaves, the moisture on the artichoke leaves is guided along with the inclination angle of the guide plate, the lower water blocking arc plate is used for bearing the moisture flowing down from the guide plate, the falling of the water onto other artichoke leaves is avoided, and the water removing speed of the artichoke leaves is prolonged.

Description

Convertible has artichoke blade of tiling structure with driping equipment

Technical Field

The invention relates to the technical field of draining for artichoke blades, in particular to a turnover type draining device with a tiled structure for artichoke blades.

Background

The artichoke is a perennial herb plant named as artichoke, french lily and lotus lily, is formed by evolution of artichoke on the coast of the midsea in the original production area, the consumption and the import of the artichoke are continuously increased in developed countries such as the United states, western Europe and the like, canned products are in short supply in the international market, the artichoke is eaten in buds, and the leaf stalks can be boiled after softening cultivation; the edible part of globe artichoke contains various nutrients, and has high contents of protein and calcium and phosphorus, and polyphenol such as cynarin and chlorogenic acid, and functional compounds such as flavonoids exist in the globe, have high content in the leaf, and are usually used for extracting the substances of globe artichoke leaves when extracting the polyphenol such as cynarin and chlorogenic acid, and the functional compounds such as flavonoids.

Before extracting chemical substances from the artichoke leaves, the artichoke leaves need to be cleaned, and the operation is carried out after the water on the artichoke leaves is drained after the cleaning is finished.

Disclosure of Invention

The invention aims to provide a turnover type leaching device for artichoke blades with a tiled structure, which is used for solving the problems in the background technology.

For realizing above-mentioned purpose, a convertible have tile structure artichoke blade with driping equipment is provided, including the article driping device that is used for driping blade moisture and set up and drip the device bottom at article and carry out driven drive arrangement to article driping device, article driping device includes the shell of feeding of two semi-cylindrical, the inside of the shell of feeding is the cavity structure of running through the bottom, the interior wall annular arrangement of the shell of feeding is fixed with a plurality of baffle that is the slope setting, the ascending one side in baffle slant is provided with accepts the stone mechanism of laying to the artichoke blade, stone mechanism includes the side guard plate that two levels set up, the side guard plate articulates on the lateral wall that is close to the baffle bottom for one end, and two be fixed with the fender frame that is network structure between the side guard plate, the lateral wall of one side guard plate and baffle are laminated mutually, the upper end of baffle is fixed with and is curved last water blocking arc board, the lower extreme of baffle is fixed with and is curved lower water blocking arc board, the inner wall of feeding lower water blocking arc board and last water blocking board are all fixed the inner wall of last water blocking dish of accepting the drive and accept the shell and accept the water blocking dish and set up the opening and accept the water blocking in the drive of motor and accept the opening.

As a further improvement of the technical scheme, an outer mounting ring is fixed on the outer side of the inner bearing disc, a semi-annular outer retaining wall is fixed on the outer side of the charging shell, and the bottom of the outer retaining wall is hinged to the placing shell.

As a further improvement of the technical scheme, a water passing cavity is arranged between the inner bearing disc and the outer mounting ring, the side wall of the inner bearing disc close to the bottom is communicated with the water passing cavity, and the bottom of the water passing cavity is provided with a plurality of water falling ports.

As a further improvement of the technical scheme, a connecting shaft is fixed in the middle of the upper side of the inner bearing plate, an upper pressing plate is fixed on the connecting shaft, turnover plates are fixed on two sides of the upper pressing plate, and a plurality of positioning pins inserted into the top of the charging shell are fixed at the bottom of each turnover plate.

As a further improvement of the technical scheme, a barrier strip attached to the guide plate is fixed at the bottom of one side, far away from the side wall of the charging shell, of the side guard plate, and a water passing hole for water guide is formed in the bottom of the side guard plate close to the inside of the charging shell.

As a further improvement of the technical scheme, an inclined side water baffle is fixed on one side of the guide plate, and two ends of the side water baffle shield one end of the upper water baffle and one end of the lower water baffle respectively.

As a further improvement of this technical scheme, one side of stone mechanism is provided with carries out the screens device of fixing a position to stone mechanism position, the screens device is including rotating the rotation axis of connection on the screens device, be provided with the fixture block that a plurality of bottom was provided with the inclined plane between rotation axis and the screens device, the upside of fixture block is fixed with the pinion rack, be fixed with the half-gear with pinion rack looks meshing on the rotation axis, the one end of rotation axis runs through the side water baffle and is fixed with the carousel.

As a further improvement of the technical scheme, clamping strips are fixed at one ends of the two side protection plates, inclined grooves matched with the clamping blocks are formed in the end portions, close to the upper sides, of the clamping strips, and the bottom sides of the clamping blocks are attached to the inclined grooves at one ends of the clamping strips.

As a further improvement of the technical scheme, a limiting strip is fixed on the guide plate, a limiting column is fixed on one side of the clamping block, one end of the limiting column penetrates through the limiting strip, an elastic spring is sleeved on the limiting column between the clamping block and the limiting strip, and torsion springs are installed at two ends of the rotating shaft.

As a further improvement of the technical scheme, a placing shell for accommodating the driving motor and receiving the inner receiving disc is arranged at the bottom of the inner receiving disc, side supporting blocks with arc-shaped upper sides are fixed on two sides of the placing shell, and the side wall of the outer retaining wall is in contact with the upper sides of the side supporting blocks.

Compared with the prior art, the invention has the beneficial effects that:

1. in this convertible has linkage structure's artichoke blade with draining equipment, it is rotatory with placing the inside artichoke leaf at article draining device to drive article draining device through drive arrangement, makes article draining device drive the artichoke leaf and passes through the effect of centrifugal force, makes the separation of water artichoke leaf for the effect that moisture got rid of on the artichoke leaf, avoids the artichoke leaf because of hanging the condition for the softness appears for a long time.

2. This convertible has in the artichoke blade of tiling structure with drip drying equipment, tile the artichoke blade through stone mechanism and come, moisture on the artichoke blade falls through keeping off the frame, so that the accuse of moisture is removed on the artichoke blade, simultaneously with stone mechanism laminating on the baffle, make stone mechanism fix a position the position of artichoke blade, the inclination of baffle is followed to the moisture on the artichoke blade simultaneously carries out the water guide, the baffle is accepted to the arc board down and is accepted the water that the baffle flows down, avoid the water that flows down to fall on other artichoke blades, and the speed that the water was removed to extension artichoke blade.

3. This convertible has tiling structure's artichoke blade among the draining equipment, it is rotatory to drive article draining device through the drive arrangement who sets up, make the water on the artichoke blade upwards flow along the baffle through centrifugal effect, and accept the water of upper stream by last arc baffle, make the water of being centrifuged out can not run indiscriminately in the shell of feeding and influence the dehydration of other artichoke blades, simultaneously by last arc baffle, the water that lower arc baffle was accepted leaves the shell of feeding through the opening, with the speed that the device got rid of moisture on the artichoke blade, guarantee after artichoke blade drains, the soft condition can not appear in the artichoke blade.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a second schematic view of the overall structure of the present invention;

FIG. 3 is a schematic view of the structure of the article drying apparatus of the present invention;

FIG. 4 is an enlarged schematic view of FIG. 3 at A;

FIG. 5 is a schematic view showing a part of the structure of the article drying apparatus according to the present invention;

FIG. 6 is an enlarged schematic view of the structure at B in FIG. 5;

FIG. 7 is a schematic structural view of a spreading mechanism of the present invention;

FIG. 8 is a schematic view of the locking device of the present invention;

FIG. 9 is an enlarged view of the structure of FIG. 8 at C;

fig. 10 is a schematic diagram of an explosive structure of the driving device of the present invention.

The various reference numbers in the figures mean:

1. an article draining device; 11. an outer retaining wall; 111. a guide plate; 12. a shell of charge; 13. a material spreading mechanism; 131. a side guard plate; 132. a blocking frame; 133. clamping the strip; 134. blocking strips; 135. a water outlet; 14. a clamping device; 141. a rotating shaft; 142. A clamping block; 143. a half gear; 144. a limiting column; 145. an elastic spring; 146. a torsion spring; 147. a turntable; 15. A water blocking arc plate is arranged; 16. a lower water retaining arc plate; 17. a side water baffle; 18. a limiting strip; 19. a port;

2. a drive device; 21. placing the shell; 22. an outer mounting ring; 23. an inner bearing disc; 24. a connecting shaft; 25. an upper pressure plate; 26. a turnover plate; 261. positioning pins; 27. a drive motor; 28. a water falling port; 29. side support blocks.

Detailed Description

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

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Example 1

Referring to fig. 1-10, the present embodiment aims to provide a turnover type draining device for artichoke blades with a flat-laying structure, which comprises an article draining device 1 for draining water from the blades and a driving device 2 arranged at the bottom of the article draining device 1 for driving the article draining device 1, wherein the article draining device 1 comprises two semi-cylindrical charging shells 12, the inner parts of the charging shells 12 are of a cavity structure penetrating through the bottom, and a plurality of guide plates 111 which are obliquely arranged are annularly arranged and fixed on the inner walls of the charging shells 12;

a spreading mechanism 13 for carrying and laying artichoke blades is arranged on one obliquely upward side of the guide plate 111, the spreading mechanism 13 comprises two side protection plates 131 which are horizontally arranged, one end of each side protection plate 131 is hinged to a side wall close to the bottom of the guide plate 111, a blocking frame 132 in a net structure is fixed between the two side protection plates 131, and one side of each side protection plate 131 is attached to the side wall of the guide plate 111;

an arc-shaped upper water retaining arc plate 15 is fixed at the upper end of the guide plate 111, an arc-shaped lower water retaining arc plate 16 is fixed at the lower end of the guide plate 111, one ends of the lower water retaining arc plate 16 and the upper water retaining arc plate 15 are fixed on the inner wall of the charging shell 12, and a through hole 19 for water passing is formed in the charging shell 12 at one ends of the upper water retaining arc plate 15 and the lower water retaining arc plate 16;

the driving device 2 comprises an inner bearing disc 23, a charging shell 12 is arranged on the upper side of the inner bearing disc 23, a driving motor 27 for driving the inner bearing disc 23 to rotate is arranged at the bottom of the inner bearing disc 23, an outer mounting ring 22 is fixed on the outer side of the inner bearing disc 23, a semi-annular outer retaining wall 11 is fixed on the outer side of the charging shell 12, and the bottom of the outer retaining wall 11 is hinged to the placing shell 21;

a connecting shaft 24 is fixed in the middle of the upper side of the inner bearing disc 23, an upper pressure plate 25 is fixed on the connecting shaft 24, turnover plates 26 are fixed on two sides of the upper pressure plate 25, and a plurality of positioning pins 261 inserted into the top of the charging shell 12 are fixed at the bottoms of the turnover plates 26;

when the article draining device 1 and the driving device 2 in the embodiment are used, a worker puts the loading shell 12 down to enable the outer retaining wall 11 to rotate around the position hinged with the outer mounting ring 22, after the loading shell 12 is turned over, the spreading mechanism 13 is opened, the artichoke leaves needing to be drained are placed in the spreading mechanism 13, and the moisture on the artichoke leaves flows out through the gaps on the retaining frames 132;

after the artichoke leaves are placed, one side of the spreading mechanism 13 is arranged on the guide plate 111, the artichoke leaves are fixed on the guide plate 111, the loading shells 12 are lifted, the side edges of the two loading shells 12 are attached to each other, the turnover plate 26 is turned over, one end of the positioning pin 261 is inserted into the loading shells 12, the positions of the two loading shells 12 are fixed, and water drained from the artichoke leaves in the spreading mechanism 13 flows into the lower water blocking arc plate 16 through the guide of the guide plate 111 and leaves the loading shells 12 through the through hole 19 in one end of the lower water blocking arc plate 16;

the rotatory pivot of driving motor 27 drives interior tray 23 and rotates, it is rotatory to make article drain device 1 follow interior tray 23, at the rotatory in-process of article drain device 1, centrifugal force through production when article drain device 1 is rotatory, make the moisture on the artichoke leaf leave from the artichoke leaf, and flow upwards along the direction of guide 111, the water that flows upwards is blockked by last arc baffle 15, and by discharging the shell of feeding 12 through opening 19, in order to avoid the moisture of separation to contact with the artichoke leaf again, improve the effect of artichoke leaf drain.

In order to remove the water flowing out of the charging shell 12, a water passing cavity is arranged between the inner bearing disc 23 and the outer mounting ring 22, the side wall of the inner bearing disc 23 close to the bottom is communicated with the water passing cavity, the bottom of the water passing cavity is provided with a plurality of water falling ports 28, the water entering the water passing cavity leaves the article draining device 1 through the water falling ports 28, so that the situation that the water enters the charging shell 12 through the through port 19 due to the accumulation of excessive water in the water passing cavity is avoided, and the effect of draining the artichoke leaves by the article draining device 1 is ensured.

In order to prevent the water on the artichoke leaves in the spreading mechanism 13 from flowing to the bottom of the charging shell 12, a blocking strip 134 attached to the guide plate 111 is fixed at the bottom of one side of the side protection plate 131 far away from the side wall of the charging shell 12, a water passing hole 135 for guiding water is formed in the bottom of the side protection plate 131 close to the inside of the charging shell 12, the water on the inner side of the charging shell 12 is blocked by the blocking strip 134, and the water on the outer side of the charging shell 12 flows into the upper water blocking arc plate 15 through the water passing hole 135, so that the water in the artichoke leaves is removed conveniently, and the accumulation of the water in the charging shell 12 and the inner receiving disc 23 is avoided.

In order to prevent water on the guide plate 111 from leaving the guide plate 111, the upper water baffle 15 and the lower water baffle 16 and entering the charging shell 12 and the inner receiving disc 23 when the article draining device 1 rotates, an inclined side water baffle 17 is fixed on one side of the guide plate 111, two ends of the side water baffle 17 respectively shield one end of the upper water baffle 15 and one end of the lower water baffle 16, one side of the guide plate 111, the upper water baffle 15 and one side of the lower water baffle 16 are blocked by the side water baffle 17, and the phenomenon that water separated from artichoke leaves flows into the charging shell 12 and the inner receiving disc 23 when the upper water baffle 15 and the lower water baffle 16 guide water is avoided.

In order to ensure that when the paving mechanism 13 is driven to rotate by the charging shell 12, artichoke leaves in the paving mechanism 13 cannot fall off from the paving mechanism 13, one side of the paving mechanism 13 is provided with a clamping device 14 for positioning the position of the paving mechanism 13, the clamping device 14 comprises a rotating shaft 141 which is rotatably connected to the clamping device 14, a plurality of clamping blocks 142 with inclined planes at the bottoms are arranged between the rotating shaft 141 and the clamping device 14, toothed plates are fixed on the upper sides of the clamping blocks 142, half gears 143 meshed with the toothed plates are fixed on the rotating shaft 141, one end of the rotating shaft 141 penetrates through the side water blocking plates 17 and is fixed with a rotating disc 147, clamping strips 133 are fixed at one ends of the two side protecting plates 131, inclined grooves matched with the clamping blocks 142 are arranged at the end parts, close to the upper sides, of the clamping strips 133, and the bottom sides of the clamping blocks 142 are attached to the inclined grooves at one ends of the clamping strips 133;

through the rotation of the turntable 147, the rotation shaft 141 drives the half gear 143 to rotate, the rotating half gear 143 drives the fixture block 142 to move through the engagement with the toothed plate, so that the fixture block 142 is far away from the fixture strip 133, the locking of the fixture strip 133 is released, meanwhile, the fixture block 142 is clamped with the fixture strip 133, the position of the spreading mechanism 13 is fixed on the guide plate 111, and then the artichoke leaves in the spreading mechanism 13 are fixed on the guide plate 111, so that the artichoke leaves cannot fly out of the spreading mechanism 13 when the article draining device 1 drives the artichoke leaves to rotate.

In order to enable the fixture block 142 not to be separated from the clamping strip 133 when the fixture block 142 limits the position of the clamping strip 133, the limiting strip 18 is fixed on the guide plate 111, the limiting post 144 is fixed on one side of the fixture block 142, one end of the limiting post 144 penetrates through the limiting strip 18, the elastic spring 145 is sleeved on the limiting post 144 between the fixture block 142 and the limiting strip 18, the side wall of the fixture block 142 is tightly attached to the side wall of the clamping strip 133 by pushing the fixture block 142 through the elastic spring 145, so that the phenomenon that the artichoke leaves in the spreading mechanism 13 are dispersed due to the separation of the fixture block 142 and the clamping strip 133 in the rotation process of the article draining device 1 is avoided, the torsion springs 146 are installed at the two ends of the rotating shaft 141, the position of the rotating shaft 141 is limited through the torsion springs 146, the rotating shaft 141 is convenient to restore to the original position after rotation, and secondary use of the device is facilitated.

In order to enable the outer retaining wall 11 to be convenient to place into the spreading mechanism 13 after being turned over, the bottom of the inner bearing disc 23 is provided with a placing shell 21 for containing the driving motor 27 and bearing the inner bearing disc 23, two sides of the placing shell 21 are fixed with side supporting blocks 29 with arc-shaped upper sides, the side wall of the outer retaining wall 11 is in contact with the upper sides of the side supporting blocks 29, the outer retaining wall 11 is supported through the side supporting blocks 29, the separation of the article draining device 1 and the driving device 2 caused by the fact that the angle of the outer retaining wall 11 is too large is avoided, and the stability of the device in use is guaranteed.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a convertible has artichoke blade of tiling and uses draining equipment, includes that the article that is used for draining blade moisture drips and dry device (1) and sets up and carry out driven drive arrangement (2), its characterized in that to article drippings device (1) in article drippings device (1) bottom: article draining device (1) includes the shell (12) of feeding of two semi-cylindrical, the inside of the shell (12) of feeding is the cavity structure that runs through the bottom, the interior wall annular arrangement of the shell (12) of feeding is fixed with a plurality of baffle (111) that is the slope setting, baffle (111) slant ascending one side is provided with accepts stone mechanism (13) of laying to the artichoke blade, stone mechanism (13) include two side guard plates (131), side guard plate (131) articulate on being close to the lateral wall of baffle (111) bottom for one end, and two be fixed with fender frame (132) that are network structure between side guard plate (131), the lateral wall of one side of side guard plate (131) and baffle (111) is laminated mutually, the upper end of baffle (111) is fixed with and is curved last water retaining arc plate (15), the lower extreme of baffle (111) is fixed with and is curved lower water retaining arc plate (16) that is, lower water retaining arc plate (16) and the one end of last water retaining arc plate (15) are all fixed in the shell (12) of feeding, and the lower water retaining arc plate (23) is used for the opening (19) of accepting the dish (23) of feeding, accept the water retaining inner wall (23) and accept the shell (12) and set up the opening (23), the bottom of the inner bearing disc (23) is provided with a driving motor (27) which drives the inner bearing disc (23) to rotate;

a barrier strip (134) attached to the guide plate (111) is fixed at the bottom of one side, away from the side wall of the charging shell (12), of the side protection plate (131), and a water passing hole (135) for water guide is formed in the bottom of the side protection plate (131) close to the interior of the charging shell (12);

clamping strips (133) are fixed at one ends of the two side protection plates (131), inclined grooves matched with the clamping blocks (142) are formed in the end portions, close to the upper sides, of the clamping strips (133), and the bottom sides of the clamping blocks (142) are attached to the inclined grooves at one ends of the clamping strips (133).

2. The roll-over type has the vegetation structure and is used the leaching equipment of artichoke blade of claim 1 characterized in that: an outer mounting ring (22) is fixed on the outer side of the inner bearing disc (23), a semi-annular outer retaining wall (11) is fixed on the outer side of the charging shell (12), and the bottom of the outer retaining wall (11) is hinged to the placing shell (21).

3. The roll-over type has the vegetation structure and is used the leaching equipment of artichoke blade of claim 1 characterized in that: a water passing cavity is arranged between the inner bearing disc (23) and the outer mounting ring (22), the side wall, close to the bottom, of the inner bearing disc (23) is communicated with the water passing cavity, and a plurality of water falling ports (28) are formed in the bottom of the water passing cavity.

4. The roll-over type has the vegetation structure and is used the leaching equipment of artichoke blade of claim 1 characterized in that: the middle position of the upper side of the inner bearing disc (23) is fixedly provided with a connecting shaft (24), an upper pressing plate (25) is fixedly arranged on the connecting shaft (24), two sides of the upper pressing plate (25) are fixedly provided with turnover plates (26), and the bottom of each turnover plate (26) is fixedly provided with a plurality of positioning pins (261) which are inserted into the top of the charging shell (12).

5. The roll-over type has the vegetation structure and is used the leaching equipment of artichoke blade of claim 1 characterized in that: an inclined side water baffle (17) is fixed on one side of the guide plate (111), and two ends of the side water baffle (17) respectively shield one ends of the upper water baffle arc plate (15) and the lower water baffle arc plate (16).

6. The roll-over type has the vegetation structure and is used the leaching equipment of artichoke blade of claim 1 characterized in that: one side of stone mechanism (13) is provided with clamping device (14) of carrying out the location to stone mechanism (13) position, clamping device (14) is including rotating rotation axis (141) of connection on clamping device (14), be provided with fixture block (142) that a plurality of bottom is provided with the inclined plane between rotation axis (141) and clamping device (14), the upside of fixture block (142) is fixed with the pinion rack, be fixed with on rotation axis (141) with pinion rack engaged with half gear (143), the one end of rotation axis (141) runs through side water baffle (17) and is fixed with carousel (147).

7. The roll-over type has the vegetation structure and is used the leaching equipment of artichoke blade of claim 6 characterized in that: the limiting device is characterized in that a limiting strip (18) is fixed on the guide plate (111), a limiting column (144) is fixed on one side of the clamping block (142), one end of the limiting column (144) penetrates through the limiting strip (18), an elastic spring (145) is sleeved on the limiting column (144) between the clamping block (142) and the limiting strip (18), and torsion springs (146) are installed at two ends of the rotating shaft (141).

8. The roll-over type has the vegetation structure and is used the leaching equipment of artichoke blade of claim 2 characterized in that: the bottom of the inner bearing disc (23) is provided with a placing shell (21) for accommodating a driving motor (27) and bearing the inner bearing disc (23), side supporting blocks (29) with arc-shaped upper sides are fixed on two sides of the placing shell (21), and the side walls of the outer retaining walls (11) are in contact with the upper sides of the side supporting blocks (29).