A tea processing fermentation equipment with environmental monitoring function

Abstract

The invention discloses a tea processing fermentation device with an environmental monitoring function, which relates to the technical field of fermentation tanks. The fermentation device comprises a fermentation tank, which is installed through a bracket. The interior of the fermentation tank is provided with a detector, and the detector is connected to a control system through a circuit. A feed hopper is provided on the top of the fermentation tank, a discharge chute is provided at the bottom of the fermentation tank, a conveyor belt is provided below the discharge chute, a pair of upper gates are installed in the feed hopper, a pair of lower gates are installed below the fermentation tank, a tank side baffle is provided on one side of the fermentation tank, a turning mechanism is installed on the tank side baffle, and an auger draws an "8-shaped" movement to turn the tea leaves in four directions of front, back, up and down. The movement path of the auger realizes comprehensive coverage of the interior of the fermentation tank, realizes efficient and uniform turning of the tea leaves, is beneficial to the fermentation process of the tea leaves, and improves the overall quality of the fermentation process.

Description

Technical Field

[0001] The invention relates to the technical field of fermentation tanks, in particular to a tea processing fermentation device with an environment monitoring function. Background Art

[0002] The fermentation processing of tea is an important link in the tea making process, which is mainly used to form the unique flavor and aroma of tea. According to the length of fermentation time, it can be divided into fresh tea, semi-fermented tea and fermented tea. Green tea is the representative of fresh tea. After the tea leaves are picked, they are directly fried after rolling. They are not fermented to ensure the refreshing taste of the tea. White tea or oolong tea is the representative of semi-fermented tea. The fermentation time is shorter, which retains part of the freshness of green tea and also produces the mellowness of fully fermented tea. Black tea or dark tea is the representative of fully fermented tea. After a long fermentation, the microbial flora decomposes the tea polyphenols, removes the bitter taste in the tea, and produces a mellow taste.

[0003] A tea fermentation tank is an important equipment in tea fermentation production. The prior art CN118556762A discloses a tea fermentation tank, comprising a tank body; a support rod is fixedly connected to the inner wall of the tank body; a protective cover is fixedly connected to the side wall of the support rod; a motor is fixedly connected to the inner wall of the protective cover; a rotating shaft is provided at the output end of the motor; a first gear is fixedly connected to one end of the rotating shaft; a rotating rod is rotatably connected to the side wall of the support rod, and one end of the rotating rod passes through the protective cover; a second gear is fixedly connected to the outer circular wall of the rotating rod; the second gear is meshed with the first gear; a pair of symmetrically distributed stirring blades are fixedly connected to the outer circular wall of the rotating rod; a rotating piece is provided at one end of the rotating rod; so that moisture and fermenting agent are evenly mixed with tea leaves.

[0004] It can be seen that the existing fermentation tanks mostly use traditional single-axis stirring mechanisms to turn the tea leaves, and the stirring range is very limited, the turning effect is poor, which is not conducive to controlling the temperature of the fermenting tea leaves, and thus affects the entire fermentation process. Summary of the invention

[0005] The purpose of the present invention is to provide a tea processing fermentation device with an environmental monitoring function to solve the problems raised in the prior art.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a fermentation device for tea processing with an environmental monitoring function, the fermentation device comprising a fermentation tank, the fermentation tank being installed by a bracket, the interior of the fermentation tank being arranged with a detector, the detector being connected to a control system through a circuit, a feed hopper being arranged at the top of the fermentation tank, a discharge chute being arranged at the bottom of the fermentation tank, a conveyor belt being arranged below the discharge chute, a pair of upper gates being installed in the feed hopper, a pair of lower gates being installed below the fermentation tank, a tank side baffle being arranged on one side of the fermentation tank, and a flipping mechanism being installed on the tank side baffle.

[0007] Furthermore, a pair of the upper gate plates are rotatably installed in the feed hopper, and the rotating shaft of each upper gate plate passes through the feed hopper. A tooth groove is provided on the outer contour of one end of the rotating shaft. An upper electric push rod and a Z-shaped tooth plate are arranged above the fermentation tank. The Z-shaped tooth plate is slidably installed on the fermentation tank through a bracket, and the piston rod of the upper electric push rod is connected to one end of the Z-shaped tooth plate.

[0008] Furthermore, a section of tooth grooves is provided on both the upper and lower surfaces of the Z-shaped tooth plate, and the two sections of the tooth grooves are respectively meshed with the tooth grooves on the two rotating shafts. Before the tea leaves to be fermented are put into the fermentation tank via the conveyor, the control system controls the upper electric push rod to drive the Z-shaped tooth plate to move, and the tooth grooves on the Z-shaped tooth plate drive the upper gate plate to rotate through the tooth grooves on the rotating shaft. Since the contact positions of the Z-shaped tooth plate and the tooth grooves on the two upper gate plates are opposite, although the Z-shaped tooth plate moves unidirectionally, the two upper gate plates rotate in opposite directions. The upper gate plates are opened or closed at the same time by the upper electric push rod driving the Z-shaped tooth plate, so that the tea leaves to be fermented can be put into the fermentation tank.

[0009] Furthermore, a pair of lower gates are slidably installed at the bottom of the fermentation tank, and a pair of lower gates are used to block the lower material trough. Lower electric push rods are symmetrically arranged on both sides of the bottom of the fermentation tank, and the piston rods of the lower electric push rods are connected to the lower gates. After the fermentation of the tea leaves is completed, the control system enables the lower electric push rods to be energized and work, and the lower electric push rods open the lower gates to both sides. The tea leaves fall under the action of gravity and finally fall onto the conveyor belt, and are transported by the conveyor belt to other locations for subsequent process processing.

[0010] Furthermore, a plurality of rotating buckles are provided on the side of the tank side baffle away from the fermentation tank, and the flipping mechanism includes a chassis, a first motor and a second motor. The chassis is rotatably installed in the rotating buckle, and a heat dissipation cover is installed on the end of the chassis away from the tank side baffle. The first motor and the second motor are installed on the inner wall of the chassis through a bracket. A first crank is installed on the motor shaft of the first motor, and a second crank is installed on the motor shaft of the second motor. The first motor rotates at a constant speed, and the angular velocity of the first motor conforms to the motion law of the Q line. The second motor rotates at a variable speed, and the angular velocity of the second motor conforms to the motion law of the Q line. Driven by the first crank and the second crank, the center position of the working connecting rod performs an "8-shaped" circular motion.

[0011] Furthermore, the flipping mechanism includes a working connecting rod, both ends of which are rotatably connected to the first crank and the second crank respectively, an extended motor bracket is provided on the side of the working connecting rod close to the heat dissipation cover plate, a first drive motor is installed on the extended motor bracket, a rotating shaft is installed on the motor shaft of the first drive motor, an auger is provided on the rotating shaft, and the auger is located inside the fermentation tank. During the movement, the working connecting rod drives the first drive motor and the rotating shaft to move simultaneously, a sealing turntable and a sealing slider separate the interior of the chassis from the interior of the fermentation tank, and at the same time, the rotating shaft passes through the sealing slider as a moving part, and the sealing turntable and the sealing slider coordinate with the movement of the rotating shaft, which mainly prevents tea leaves from entering the interior of the chassis from the fermentation tank.

[0012] Furthermore, the flipping mechanism includes a sealing turntable and a sealing slider, the sealing turntable is rotatably installed at one end of the chassis away from the heat dissipation cover plate, the sealing turntable passes through the chassis and the tank side baffle, the sealing turntable and the tank side baffle are rotatably and sealedly connected, the sealing slider is slidably and sealedly connected to the sealing turntable, the sealing slider is located inside the chassis, the rotating shaft passes through the sealing slider, the first drive motor drives the rotating shaft to rotate, the auger rotates in the fermentation tank, the forward and reverse rotation of the first drive motor can flip the tea leaves in the fermentation tank toward the end faces of the two tank bodies through the auger, and the auger draws an "8-shaped" movement to flip the tea leaves in four directions of front, back, up and down.

[0013] Furthermore, the flipping mechanism includes a second drive motor and a gear, the gear is mounted on the motor shaft of the second drive motor, a circle of teeth is provided on the outer contour of the chassis, the gear is meshed with the teeth, the control system drives the gear to rotate through the second drive motor, and the gear meshes with the teeth on the chassis to drive the entire chassis to rotate, that is, the auger can not only make an "8-shaped" movement, but also make an axial movement around the axis of the fermentation tank. The range of the auger's "8-shaped" movement passes through the axis of the fermentation tank. Therefore, the movement path of the auger achieves comprehensive coverage of the interior of the fermentation tank, thereby achieving efficient and uniform flipping of the tea leaves, which is beneficial to the fermentation process of the tea leaves and improves the overall quality of the fermentation process.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] By making the Z-shaped tooth plate contact the tooth grooves on the two upper gate plates in reverse positions, the unidirectional movement of the Z-shaped tooth plate drives the two upper gate plates to rotate in opposite directions, and the upper electric push rod drives the Z-shaped tooth plate to open or close the upper gate plates at the same time.

[0016] The first motor rotates at a constant speed, and the second motor changes speed to rotate the center position of the working connecting rod to make an "8-shaped" circular motion, and then the second drive motor is used to drive the entire chassis to rotate. The forward and reverse rotation of the first drive motor can turn the tea leaves in the fermentation tank toward the end faces of the two tanks through the auger. The auger draws an "8-shaped" motion to turn the tea leaves in four directions: front, back, up and down. The movement path of the auger achieves comprehensive coverage of the interior of the fermentation tank, realizes efficient and uniform turning of the tea leaves, is beneficial to the fermentation process of the tea leaves, and improves the overall quality of the fermentation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The overall appearance structure of the present invention is shown in FIG. Figure 1 ;

[0018] Figure 2 The overall structure of the present invention is shown in FIG. Figure 2 ;

[0019] Figure 3 The internal structure of the fermentation tank of the present invention is shown in FIG. Figure 1 ;

[0020] Figure 4 The internal structure of the fermentation tank of the present invention is shown in FIG. Figure 2 ;

[0021] Figure 5 It is a structural schematic diagram of the flipping mechanism of the present invention.

[0022] Figure 6 It is a schematic structural diagram of the sealing turntable part of the present invention.

[0023] Figure 7 It is a schematic diagram of the movement of the working connecting rod of the present invention.

[0024] Figure 8 It is a schematic diagram of the angular velocity of the first motor and the second motor of the present invention.

[0025] In the figure: 1. fermentation tank; 2. feed hopper; 3. upper gate; 4. Z-shaped tooth plate; 5. upper electric push rod; 6. lower gate; 7. lower electric push rod; 8. tank side baffle; 9. rotating buckle; 10. chassis; 11. heat dissipation cover; 12. first motor; 13. first crank; 14. second motor; 15. second crank; 16. working connecting rod; 17. extended motor bracket; 18. first drive motor; 19. sealing turntable; 20. sealing slider; 21. rotating shaft; 22. auger; 23. gear; 24. second drive motor. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Example: Figure 1-Figure 8 As shown, the present invention provides a technical solution, a fermentation equipment for tea processing with an environmental monitoring function, the fermentation equipment comprises a fermentation tank 1, the fermentation tank 1 is installed by a bracket, the interior of the fermentation tank 1 is arranged with a detector, the detector is connected to the control system through a circuit, a feed hopper 2 is arranged on the top of the fermentation tank 1, a feed chute is opened at the bottom of the fermentation tank 1, a conveyor belt (not shown in the figure) is arranged below the feed chute, a pair of upper gates 3 are installed in the feed hopper 2, a pair of lower gates 6 are installed below the fermentation tank 1, a tank side baffle 8 is arranged on one side of the fermentation tank 1, and a flipping mechanism is installed on the tank side baffle 8.

[0028] A pair of upper gate plates 3 are rotatably installed in the feed hopper 2, and the rotating shaft of each upper gate plate 3 passes through the feed hopper 2. A tooth groove is provided on the outer contour of one end of the rotating shaft rod. An upper electric push rod 5 and a Z-shaped tooth plate 4 are arranged above the fermentation tank 1. The Z-shaped tooth plate 4 is slidably installed on the fermentation tank 1 through a bracket. The piston rod of the upper electric push rod 5 is connected to one end of the Z-shaped tooth plate 4. A section of tooth groove is arranged on the upper and lower surfaces of the Z-shaped tooth plate 4, and the two sections of tooth groove are respectively engaged with the tooth grooves on the two rotating shaft rods. A pair of lower gate plates 6 are slidably installed at the bottom of the fermentation tank 1, and a pair of lower gate plates 6 block the lower feed trough. Lower electric push rods 7 are symmetrically arranged on both sides of the bottom of the fermentation tank 1, and the piston rod of the lower electric push rod 7 is connected to the lower gate plate 6.

[0029] Before the tea leaves to be fermented are put into the fermentation tank 1 via the conveyor, the control system controls the upper electric push rod 5 to drive the Z-shaped tooth plate 4 to move. The teeth on the Z-shaped tooth plate 4 drive the upper gate plate 3 to rotate through the teeth on the rotating shaft. Since the contact positions of the teeth on the Z-shaped tooth plate 4 and the two upper gate plates 3 are opposite, although the Z-shaped tooth plate 4 moves in one direction, the two upper gate plates 3 rotate in opposite directions. The upper electric push rod 5 drives the Z-shaped tooth plate 4 to open or close the upper gate plates 3 at the same time, so that the tea leaves to be fermented can be put into the fermentation tank 1. After the tea leaves are fermented, the control system enables the lower electric push rod 7 to work, and the lower electric push rod 7 opens the lower gate plate 6 to both sides. The tea leaves fall under the action of gravity and finally fall onto the conveyor belt, and are transported by the conveyor belt to other locations for subsequent process processing.

[0030] A plurality of rotating buckles 9 are provided on the side of the tank side baffle 8 away from the fermentation tank 1. The flipping mechanism includes a chassis 10, a first motor 12 and a second motor 14. The chassis 10 is rotatably installed in the rotating buckle 9. A heat dissipation cover plate 11 is installed at one end of the chassis 10 away from the tank side baffle 8. The first motor 12 and the second motor 14 are installed on the inner wall of the chassis 10 through a bracket. A first crank 13 is installed on the motor shaft of the first motor 12, and a second crank 15 is installed on the motor shaft of the second motor 14. The first motor 12 rotates at a constant speed, and the angular velocity of the first motor 12 conforms to the motion law of the Q1 line. The second motor 14 rotates at a variable speed, and the angular velocity of the second motor 14 conforms to the motion law of the Q2 line. Driven by the first crank 13 and the second crank 15, the center position of the working connecting rod 16 performs an "8-shaped" circular motion.

[0031] The flipping mechanism includes a working connecting rod 16, and the two ends of the working connecting rod 16 are rotatably connected to the first crank 13 and the second crank 15 respectively. An extended motor bracket 17 is provided on the side of the working connecting rod 16 close to the heat dissipation cover plate 11, and a first drive motor 18 is installed on the extended motor bracket 17. A rotating shaft 21 is installed on the motor shaft of the first drive motor 18, and an auger 22 is provided on the rotating shaft 21. The auger 22 is located inside the fermentation tank 1. The flipping mechanism includes a sealing turntable 19 and a sealing slider 20. The sealing turntable 19 is rotatably mounted on At one end of the chassis 10 away from the heat dissipation cover 11, the sealing turntable 19 passes through the chassis 10 and the tank side baffle 8, the sealing turntable 19 is rotatably sealed and connected to the tank side baffle 8, the sealing slider 20 is slidably sealed and connected to the sealing turntable 19, the sealing slider 20 is located inside the chassis 10, the rotating shaft 21 passes through the sealing slider 20, the flipping mechanism includes a second drive motor 24 and a gear 23, the gear 23 is installed on the motor shaft of the second drive motor 24, a circle of teeth is provided on the outer contour of the chassis 10, and the gear 23 is meshed with the teeth.

[0032] The working connecting rod 16 drives the first driving motor 18 and the rotating shaft 21 to move simultaneously during the movement. The sealing rotating disk 19 and the sealing slider 20 separate the interior of the chassis 10 from the interior of the fermentation tank 1. At the same time, the rotating shaft 21 passes through the sealing slider 20 as a moving part. The sealing rotating disk 19 and the sealing slider 20 coordinate with the movement of the rotating shaft 21, which mainly prevents tea leaves from entering the interior of the chassis 10 from the fermentation tank 1. The first driving motor 18 drives the rotating shaft 21 to rotate, and the auger 22 rotates in the fermentation tank 1. The forward and reverse rotation of the first driving motor 18 can turn the tea leaves in the fermentation tank 1 toward the end faces of the two tank bodies through the auger 22. The auger 22 makes an "8-shaped" movement to turn the tea leaves in four directions: front, back, up and down. The control system drives the gear 23 to rotate through the second drive motor 24. The gear 23 engages with the tooth grooves on the chassis 10 to drive the entire chassis 10 to rotate. That is, in addition to the "8-shaped" movement, the auger 22 can also make an axial movement around the axis of the fermentation tank 1. The range of the "8-shaped" movement of the auger 22 passes through the axis of the fermentation tank 1. Therefore, the movement path of the auger 22 realizes comprehensive coverage of the interior of the fermentation tank 1, realizes efficient and uniform turning of the tea leaves, is beneficial to the fermentation process of the tea leaves, and improves the overall quality of the fermentation process.

[0033] The working principle of the present invention is as follows: before the tea leaves to be fermented are put into the fermentation tank 1 via the conveyor, the control system controls the upper electric push rod 5 to drive the Z-shaped tooth plate 4 to move, and the teeth on the Z-shaped tooth plate 4 drive the upper gate plate 3 to rotate through the teeth on the rotating shaft. Since the contact positions of the teeth on the Z-shaped tooth plate 4 and the two upper gate plates 3 are opposite, although the Z-shaped tooth plate 4 moves in one direction, the two upper gate plates 3 rotate in opposite directions. The upper electric push rod 5 drives the Z-shaped tooth plate 4 to open or close the upper gate plates 3 at the same time, so that the tea leaves to be fermented can be put into the fermentation tank 1. After the tea leaves are fermented, the control system enables the lower electric push rod 7 to work, and the lower electric push rod 7 opens the lower gate plate 6 to both sides. The tea leaves fall under the action of gravity and finally fall onto the conveyor belt, and are transported by the conveyor belt to other positions for subsequent process processing.

[0034] The first motor 12 rotates at a constant speed, and the angular velocity of the first motor 12 conforms to the motion law of the Q1 line. The second motor 14 rotates at a variable speed, and the angular velocity of the second motor 14 conforms to the motion law of the Q2 line. Driven by the first crank 13 and the second crank 15, the center position of the working connecting rod 16 performs an "8-shaped" circular motion. During the movement, the working connecting rod 16 drives the first drive motor 18 and the rotating shaft 21 to move simultaneously. The sealing turntable 19 and the sealing slider 20 separate the interior of the chassis 10 from the interior of the fermentation tank 1. At the same time, the rotating shaft 21 passes through the sealing slider 20 as a moving part, and the sealing turntable 19 and the sealing slider 20 are connected. The sealing slider 20 coordinates with the movement of the rotating shaft 21, mainly preventing tea leaves from entering the interior of the chassis 10 from the fermentation tank 1. The first drive motor 18 drives the rotating shaft 21 to rotate, and the auger 22 rotates in the fermentation tank 1. The forward and reverse rotation of the first drive motor 18 can turn the tea leaves in the fermentation tank 1 toward the end faces of the two tank bodies through the auger 22. The auger 22 draws an "8-shaped" movement to turn the tea leaves in four directions of front, back, up and down. The control system drives the gear 23 to rotate through the second drive motor 24, and the gear 23 drives the entire chassis 10 to rotate by engaging with the tooth grooves on the chassis 10.

[0035] In addition to being able to make "figure 8" motion, the auger 22 can also make axial motion around the axis of the fermentation tank 1. The range of the "figure 8" motion of the auger 22 passes through the axis of the fermentation tank 1. Therefore, the movement path of the auger 22 achieves full coverage of the interior of the fermentation tank 1, achieves efficient and uniform turning of the tea leaves, is beneficial to the fermentation process of the tea leaves, and improves the overall quality of the fermentation process.

[0036] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A tea processing fermentation equipment with environmental monitoring function, characterized in that: The fermentation equipment comprises a fermentation tank (1), wherein the fermentation tank (1) is installed via a bracket, a detector is arranged inside the fermentation tank (1), the detector is connected to a control system via a circuit, a feed hopper (2) is arranged on the top of the fermentation tank (1), a feed chute is provided at the bottom of the fermentation tank (1), a conveyor belt is arranged below the feed chute, a pair of upper gates (3) are installed in the feed hopper (2), a pair of lower gates (6) are installed below the fermentation tank (1), a tank side baffle (8) is arranged on one side of the fermentation tank (1), and a flipping mechanism is installed on the tank side baffle (8); A plurality of rotating buckles (9) are arranged on a side of the tank side baffle (8) away from the fermentation tank (1); the flipping mechanism comprises a chassis (10), a first motor (12) and a second motor (14); the chassis (10) is rotatably mounted in the rotating buckle (9); a heat dissipation cover plate (11) is mounted on one end of the chassis (10) away from the tank side baffle (8); the first motor (12) and the second motor (14) are mounted on the inner wall of the chassis (10) via a bracket; a first crank (13) is mounted on the motor shaft of the first motor (12); and a second crank (15) is mounted on the motor shaft of the second motor (14); The turning mechanism comprises a working connecting rod (16), the two ends of which are rotatably connected to the first crank (13) and the second crank (15), respectively; an extended motor bracket (17) is provided on a side of the working connecting rod (16) close to the heat dissipation cover plate (11); a first drive motor (18) is mounted on the extended motor bracket (17); a rotating shaft (21) is mounted on the motor shaft of the first drive motor (18); an auger (22) is provided on the rotating shaft (21); and the auger (22) is located inside the fermentation tank (1).

2. The tea processing fermentation equipment with environmental monitoring function according to claim 1, characterized in that: A pair of upper gate plates (3) are rotatably mounted in the feed hopper (2); a rotating shaft of each upper gate plate (3) passes through the feed hopper (2); a tooth groove is provided on the outer contour of one end of the rotating shaft; an upper electric push rod (5) and a Z-shaped tooth plate (4) are arranged above the fermentation tank (1); the Z-shaped tooth plate (4) is slidably mounted on the fermentation tank (1) through a bracket; and a piston rod of the upper electric push rod (5) is connected to one end of the Z-shaped tooth plate (4).

3. The tea processing fermentation equipment with environmental monitoring function according to claim 2, characterized in that: A tooth groove is provided on both the upper and lower surfaces of the Z-shaped tooth plate (4), and the two tooth grooves are respectively meshed with the tooth grooves on the two rotating shafts.

4. The tea processing fermentation equipment with environmental monitoring function according to claim 1, characterized in that: A pair of lower gate plates (6) are slidably mounted on the bottom of the fermentation tank (1), and the pair of lower gate plates (6) seal the lower material trough. Lower electric push rods (7) are symmetrically arranged on both sides of the bottom of the fermentation tank (1), and the piston rods of the lower electric push rods (7) are connected to the lower gate plates (6).

5. The tea processing fermentation equipment with environmental monitoring function according to claim 1, characterized in that: The flipping mechanism comprises a sealing rotating disk (19) and a sealing sliding block (20); the sealing rotating disk (19) is rotatably mounted on one end of the chassis (10) away from the heat dissipation cover plate (11); the sealing rotating disk (19) penetrates the chassis (10) and the tank side baffle (8); the sealing rotating disk (19) is rotatably sealedly connected to the tank side baffle (8); the sealing sliding block (20) is slidably sealedly connected to the sealing rotating disk (19); the sealing sliding block (20) is located inside the chassis (10); and the rotating shaft (21) penetrates the sealing sliding block (20).

6. The tea processing fermentation equipment with environmental monitoring function according to claim 1, characterized in that: The flipping mechanism comprises a second drive motor (24) and a gear (23); the gear (23) is mounted on the motor shaft of the second drive motor (24); a circle of tooth grooves is provided on the outer contour of the chassis (10); and the gear (23) is meshedly connected with the tooth grooves.

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