A tomato sauce blending and dispensing apparatus

Abstract

The present disclosure relates to the technical field of tomato sauce stirring and blending, and one embodiment of the present disclosure provides a tomato sauce stirring and blending device, which comprises a rack, a container rotatably connected in the rack, a stirring plate, a cleaning plate, a lifting mechanism and a turnover mechanism. The stirring plate is arranged in the container through a rotating mechanism, the top end of the stirring plate is fixedly connected with a plurality of stirring rods, the stirring plate and the plurality of stirring rods can be driven to rotate, and the tomato sauce can be stirred. The cleaning plate is arranged on one side of the container through a moving mechanism, the lifting mechanism is arranged at the bottom end of the container, the stirring plate can be driven to extend out of the container, and the tomato sauce on the inner wall of the container can be pushed out of the container, and the turnover mechanism is arranged on the rack. Through the above technical solution, the technical problem that the tomato sauce is easily adhered to the inner wall of the container and the stirring rod due to the relatively thick tomato sauce, is difficult to clean, and the tomato sauce is easily wasted is solved.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the field of tomato sauce mixing and blending technology, and more specifically, to a tomato sauce mixing and blending device. Background Technology

[0002] Tomato sauce is a common condiment in people's daily lives. Tomato sauce is usually made by thoroughly mixing tomato pulp, sugar, salt, vinegar, spices, thickeners and other ingredients. When mixing multiple ingredients, it is necessary to use a mixing device to mix them evenly.

[0003] Existing mixing equipment typically uses a motor to drive a stirring rod to uniformly mix various ingredients in a container. However, when discharging tomato sauce after mixing, the sauce tends to stick to the inner wall of the container and the stirring rod due to its viscosity, making it difficult to clean and resulting in significant waste. Summary of the Invention

[0004] To overcome the above-mentioned defects, the embodiments of this disclosure provide a tomato sauce mixing and preparation device to solve the technical problem in the prior art that, due to the high viscosity of tomato sauce, it is easy for tomato sauce to adhere to the inner wall of the container and the stirring rod, making it difficult to clean and causing a large waste of tomato sauce.

[0005] According to one aspect, at least one embodiment of this disclosure provides a tomato sauce mixing and preparation device, including a frame, a container rotatably connected within the frame, and further including: a stirring plate, a cleaning plate, a lifting mechanism, and a tilting mechanism. The stirring plate is disposed inside the container via the rotating mechanism, and a plurality of stirring rods are fixedly connected to the top of the stirring plate, which can drive the stirring plate and the plurality of stirring rods to rotate and stir the tomato sauce. The cleaning plate is disposed on one side of the container via a moving mechanism, which can scrape the tomato sauce off the stirring plate and the stirring rods. The lifting mechanism is disposed at the bottom of the container, which can drive the stirring plate to extend out of the container and push the tomato sauce on the inner wall of the container out of the container. The tilting mechanism is disposed on the frame, which can drive the container to tilt and discharge the material.

[0006] To drive the stirring plate and stirring rod to rotate and stir the tomato sauce, the rotating mechanism includes: a rotating plate, a rotating rod, a rotating gear, and a driving assembly. The bottom of the container has a rotating opening, the rotating plate is rotatably connected to the rotating opening, the rotating plate has a through hole, the rotating rod rotates and slides within the through hole, the stirring plate is fixedly connected to the top of the rotating rod, the rotating gear is fixedly connected to the bottom of the rotating plate, the rotating gear has a sliding hole, the rotating rod slides within the sliding hole, a limiting rod is fixedly connected within the sliding hole, the rotating rod has a sliding groove, the limiting rod slides within the sliding groove, and the driving assembly is located at the bottom of the container and can drive the rotating gear to rotate.

[0007] To drive the rotating rod to rotate, the driving assembly includes: a fixed frame, a driving gear, and a first motor. The fixed frame is fixedly connected to the bottom end of the container, the driving gear is rotatably connected inside the fixed frame, and the driving gear meshes with the rotating gear. The first motor is installed at the bottom end of the fixed frame, and the output end of the first motor passes through the fixed frame and is axially fixedly connected to the driving gear.

[0008] To facilitate the lifting of the drive rod and stirring plate within the container and to scrape off the tomato sauce adhering to the inner wall, the lifting mechanism includes: a rotating wheel, a drive groove, and a second motor. The rotating wheel is mounted at the bottom of the container via a support assembly. Multiple protrusions are fixedly connected to the circumferential surface of the rotating wheel. Multiple drive grooves matching the protrusions are formed on the circumferential surface of the rotating rod, and the protrusions engage with the drive grooves. The second motor is located at the bottom of the container, and its output end is fixedly connected to the rotating wheel.

[0009] To drive the cleaning plate to scrape off the tomato sauce adhering to the stirring plate and stirring rod, the moving mechanism includes: a stabilizing frame, sliding rods, a pushing frame, and a power assembly. The stabilizing frame is fixedly connected to one side of the container. There are two sliding rods, both of which are slidably connected to the top of the stabilizing frame. The cleaning plate is fixedly connected to one end of the two sliding rods. The pushing frame is fixedly connected to the other end of the two sliding rods. The power assembly is mounted on the stabilizing frame and can drive the sliding rods to move on the stabilizing frame.

[0010] To drive the slide plate and cleaning plate to move on the stabilizer, the power assembly includes a moving screw and a third motor. The moving screw is rotatably connected to one side of the stabilizer. The push frame has a screw hole, and the moving screw is threaded into the screw hole. The third motor is installed on the other side of the stabilizer, and the output end of the third motor passes through the stabilizer and is fixedly connected to one end of the moving screw.

[0011] To drive the container to tilt for discharge, the tilting mechanism includes: a rotating shaft, a tilting gear, a power gear, and a fourth motor. There are two rotating shafts, both of which are rotatably connected within the frame. The container is fixedly connected between the rotating shafts. The tilting gear is fixedly connected to one of the rotating shafts. The power gear meshes with the tilting gear. The fourth motor is mounted on one side of the frame, and its output end passes through the frame and is fixedly connected to the power gear.

[0012] To increase the stability of the rotating wheel during rotation, the support assembly includes a support plate and a support shaft. Two support plates are provided, and both support plates are fixedly connected to the bottom of the container. The support shaft is rotatably connected between the two support plates. The rotating wheel is fixedly connected to the support shaft. The second motor is mounted on one of the support plates, and the output end of the second motor passes through the support plate and is fixedly connected to one end of the support shaft.

[0013] The beneficial effects of the embodiments disclosed herein are as follows: In this disclosure, a rotating mechanism drives the stirring plate and stirring rod to rotate inside the container, facilitating the uniform mixing of the tomato sauce. A tilting mechanism tilts the container, discharging the mixed tomatoes. During discharge, a lifting mechanism moves the rotating rod and stirring plate, scraping off any tomatoes adhering to the container's inner wall, effectively preventing tomato sauce from sticking. When the stirring plate is aligned with the container's opening, a moving mechanism moves a cleaning plate, scraping off the tomato sauce from the stirring plate and stirring rod. This comprehensive cleaning of the tomato sauce adhering to the container's inner wall, stirring plate, and stirring rod reduces waste. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure in one embodiment of the present disclosure; Figure 2 This is a structural schematic diagram from another angle in one embodiment of the present disclosure; Figure 3 This is a schematic diagram of the structure of the container, rotating mechanism, lifting mechanism and tilting mechanism in one embodiment of the present disclosure; Figure 4This is a cross-sectional structural diagram of a container in one embodiment of the present disclosure; Figure 5 This is a schematic diagram of the rotating mechanism and the lifting mechanism in one embodiment of the present disclosure; Figure 6 This is a schematic diagram of the structure of the moving mechanism in one embodiment of the present disclosure; Figure 7 This is a schematic diagram of the rotating mechanism in one embodiment of the present disclosure.

[0016] In the diagram: 1. Frame; 2. Container; 3. Stirring plate; 4. Stirring rod; 5. Cleaning plate; 6. Rotating plate; 7. Rotating rod; 8. Rotating gear; 9. Limiting rod; 10. Fixing frame; 11. Drive gear; 12. First motor; 13. Rotating wheel; 14. Protrusion; 15. Drive groove; 16. Second motor; 17. Stabilizing frame; 18. Slide rod; 19. Pushing frame; 20. Moving screw; 21. Third motor; 22. Rotating shaft; 23. Tilting gear; 24. Power gear; 25. Fourth motor; 26. Support plate; 27. Support shaft. Detailed Implementation The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0017] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0018] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0019] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0020] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0021] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] like Figures 1-7 The diagram illustrates a tomato sauce mixing and preparation device according to an embodiment of this disclosure. It includes a frame 1, with a container 2 rotatably connected within the frame 1. The device also includes a mixing plate 3, a cleaning plate 5, a lifting mechanism, and a tilting mechanism. The mixing plate 3 is mounted inside the container 2 via the rotating mechanism. Multiple mixing rods 4 are fixedly connected to the top of the mixing plate 3, enabling the mixing plate 3 and the multiple mixing rods 4 to rotate and mix the tomato sauce. The cleaning plate 5 is mounted on one side of the container 2 via a moving mechanism, enabling it to scrape the tomato sauce off the mixing plate 3 and the mixing rods 4. The lifting mechanism is located at the bottom of the container 2, enabling it to extend the mixing plate 3 out of the container 2, pushing the tomato sauce from the inner wall of the container 2 out. The tilting mechanism is mounted on the frame 1, enabling it to tilt the container 2 to discharge the tomato sauce. The system is designed to rotate the stirring plate 3 and stirring rod 4 inside the container 2, facilitating the even mixing of the tomato sauce. A tilting mechanism allows the container 2 to tilt, discharging the mixed tomato sauce. During discharge, a lifting mechanism moves the rotating rod 7 and stirring plate 3, scraping off any tomato sauce adhering to the inner wall of the container 2, effectively preventing tomato sauce from sticking. When the stirring plate 3 is aligned with the port of the container 2, a moving mechanism moves the cleaning plate 5, scraping off the tomato sauce from the stirring plate 3 and stirring rod 4. This comprehensive cleaning of the tomato sauce adhering to the inner wall of the container 2, the stirring plate 3, and the stirring rod 4 reduces waste.

[0023] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 7 As shown, the rotating mechanism includes: a rotating plate 6, a rotating rod 7, a rotating gear 8, and a drive assembly. A rotating opening is provided at the bottom of the container 2. The rotating plate 6 is rotatably connected to the rotating opening. A through hole is provided on the rotating plate 6. The rotating rod 7 rotates and slides within the through hole. A stirring plate 3 is fixedly connected to the top of the rotating rod 7. The rotating gear 8 is fixedly connected to the bottom of the rotating plate 6. A sliding hole is provided on the rotating gear 8. The rotating rod 7 slides within the sliding hole. A limiting rod 9 is fixedly connected within the sliding hole. A sliding groove is provided on the rotating rod 7. The limiting rod 9 slides within the sliding groove. The drive assembly is located at the bottom of the container 2 and can drive the rotating gear 8 to rotate. The drive assembly includes: a fixed frame 10, a drive gear 11, and a first motor 12. The fixed frame 10... The drive gear 11 is rotatably connected to the bottom of the container 2 and meshes with the rotating gear 8. The first motor 12 is installed at the bottom of the fixed frame 10. The output end of the first motor 12 passes through the fixed frame 10 and is axially fixedly connected to the drive gear 11. The drive gear 11 is driven to rotate by the first motor 12 installed on the fixed frame 10. When the drive gear 11 rotates, it drives the rotating gear 8 and the rotating plate 6 to rotate in the rotating opening. When the rotating gear 8 rotates, the limiting rod 9 set in the sliding hole slides in the sliding groove, thereby driving the rotating rod 7 to rotate synchronously with the rotating gear 8, thereby driving the stirring plate 3 and the stirring rod 4 to evenly mix and stir the tomato sauce in the container 2.

[0024] like Figures 1-5As shown, the lifting mechanism includes: a rotating wheel 13, a drive groove 15, and a second motor 16. The rotating wheel 13 is mounted on the bottom of the container 2 via a support assembly. Multiple protrusions 14 are fixedly connected to the circumferential surface of the rotating wheel 13. Multiple drive grooves 15 matching the protrusions 14 are formed on the circumferential surface of the rotating rod 7, and the protrusions 14 mesh with the drive grooves 15. The second motor 16 is located at the bottom of the container 2, and its output end is fixedly connected to the rotating wheel 13. The support assembly includes: a support plate 26 and a support shaft 27. Two support plates 26 are provided, and both support plates 26 are fixedly connected to the bottom of the container 2. The support shaft 27 is rotatably connected between two support plates 26, and the rotating wheel 13 is fixedly connected to the support shaft 27. The second motor 16 is installed on one of the support plates 26. The output end of the second motor 16 passes through the support plate 26 and is fixedly connected to one end of the support shaft 27. The second motor 16 drives the rotating wheel 13 to rotate. Since the protrusion 14 meshes with the drive groove 15 opened on the rotating rod 7, the rotating wheel 13 drives the rotating rod 7 to move in the sliding hole opened on the rotating gear 8 when rotating, thereby driving the stirring plate 3 to rise in the container 2, thereby scraping out the tomato sauce adhering to the inner wall of the container 2.

[0025] like Figures 1-6 As shown, the moving mechanism includes: a stabilizing frame 17, sliding rods 18, a pushing frame 19, and a power assembly. The stabilizing frame 17 is fixedly connected to one side of the container 2. Two sliding rods 18 are provided, and both sliding rods 18 are slidably connected to the top of the stabilizing frame 17. The cleaning plate 5 is fixedly connected to one end of the two sliding rods 18. The pushing frame 19 is fixedly connected to the other end of the two sliding rods 18. The power assembly is mounted on the stabilizing frame 17 and can drive the sliding rods 18 to move on the stabilizing frame 17. The power assembly includes: a moving screw 20 and a third motor 21. The moving screw 20 is rotatably connected to one side of the stabilizing frame 17. The pushing frame 19... A screw hole is provided on the 19, and the moving screw 20 is threaded into the screw hole. The third motor 21 is installed on the other side of the stabilizer 17. The output end of the third motor 21 passes through the stabilizer 17 and is fixedly connected to one end of the moving screw 20. When the stirring plate 3 is flush with the port of the container 2, the moving screw 20 is driven to rotate by the third motor 21. When the moving screw 20 rotates, it drives the pushing frame 19 and the two sliding rods 18 to move on the stabilizer 17. When the sliding rods 18 move, they drive the cleaning plate 5 to move at the port of the container 2, thereby scraping off the tomato sauce adhering to the stirring plate 3 and the stirring rod 4 more thoroughly.

[0026] like Figures 1-3As shown, the flipping mechanism includes: a rotating shaft 22, a flipping gear 23, a power gear 24, and a fourth motor 25. There are two rotating shafts 22, both of which are rotatably connected inside the frame 1. The container 2 is fixedly connected between the rotating shafts 22. The flipping gear 23 is fixedly connected to one of the rotating shafts 22. The power gear 24 meshes with the flipping gear 23. The fourth motor 25 is installed on one side of the frame 1. The output end of the fourth motor 25 passes through the frame 1 and is fixedly connected to the power gear 24. The fourth motor 25 drives the power gear 24 and the flipping gear 23 to rotate. When the flipping gear 23 rotates, it drives the rotating shaft 22 to rotate, thereby causing the container 2 to flip, so that the tomato sauce in the container 2 is discharged.

[0027] Working principle: When tomato sauce needs to be stirred, it is added to container 2. The first motor 12 mounted on the fixed frame 10 drives the drive gear 11 to rotate. When the drive gear 11 rotates, it drives the rotating gear 8 and the rotating plate 6 to rotate within the rotating opening. When the rotating gear 8 rotates, the limiting rod 9 set in the sliding hole slides in the sliding groove, thereby driving the rotating rod 7 to rotate synchronously with the rotating gear 8. This drives the stirring plate 3 and the stirring rod 4 to evenly mix the tomato sauce in container 2. After stirring, when it is necessary to discharge the tomato sauce, the fourth motor 25 drives the power gear 24 and the tilting gear 23 to rotate. When the tilting gear 23 rotates, it drives the rotating shaft 22 to rotate, thereby causing container 2 to tilt, thus discharging the tomato sauce. The tomato sauce in container 2 is discharged. During the discharge process, the second motor 16 drives the rotating wheel 13 to rotate. Since the protrusion 14 engages with the drive groove 15 on the rotating rod 7, the rotating wheel 13 drives the rotating rod 7 to move in the sliding hole on the rotating gear 8 when it rotates, thereby driving the stirring plate 3 to rise in container 2, thus scraping off the tomato sauce adhering to the inner wall of container 2. When the stirring plate 3 is aligned with the port of container 2, the third motor 21 drives the moving screw 20 to rotate. When the moving screw 20 rotates, it drives the push frame 19 and the two sliding rods 18 to move on the stabilizing frame 17. When the sliding rods 18 move, they drive the cleaning plate 5 to move at the port of container 2, thereby scraping off the tomato sauce adhering to the stirring plate 3 and stirring rod 4 more thoroughly.

[0028] It should also be noted that the edge of the stirring plate 3 is sealed to the inner wall of the container 2, and an air hole is provided at the bottom of the container 2, which facilitates the movement of the stirring plate 3 in the sealed state within the container 2. In addition, the cleaning plate 5 has grooves that match multiple stirring rods 4. When the cleaning plate 5 moves, the stirring plate 3 needs to be rotated so that one end of each stirring rod 4 corresponds to each groove. When the cleaning plate 5 moves, the tomato sauce adhering to the corner formed between the stirring rods 4 and the stirring plate 3 can be scraped off and cleaned more thoroughly.

[0029] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A tomato sauce mixing and preparation device, comprising a frame (1), wherein a container (2) is rotatably connected within the frame (1), characterized in that, Also includes: A stirring plate (3) is set inside the container (2) by a rotating mechanism. Multiple stirring rods (4) are fixedly connected to the top of the stirring plate (3), which can drive the stirring plate (3) and the multiple stirring plates (3) to rotate and stir the tomato sauce. Cleaning plate (5), which is set on one side of the container (2) by a moving mechanism, can scrape the tomato sauce off the stirring plate (3) and the stirring rod (4); A lifting mechanism is provided at the bottom of the container (2) and can drive the stirring plate (3) to extend out of the container (2) and push the tomato sauce on the inner wall of the container (2) out of the container (2). A flipping mechanism is provided on the frame (1) and is capable of driving the container (2) to flip and discharge material; The rotating mechanism includes: Rotating plate (6), the bottom end of the container (2) is provided with a rotating port, and the rotating plate (6) is rotatably connected to the rotating port; A rotating rod (7) is provided with a through hole on the rotating plate (6). The rotating rod (7) rotates and slides in the through hole. The stirring plate (3) is fixedly connected to the top of the rotating rod (7). Rotating gear (8) is fixedly connected to the bottom end of rotating plate (6). A sliding hole is provided on the rotating gear (8). The rotating rod (7) is slidably disposed in the sliding hole. A limiting rod (9) is fixedly connected in the sliding hole. A sliding groove is provided on the rotating rod (7). The limiting rod (9) is slidably connected in the sliding groove. A drive assembly is disposed at the bottom end of the container (2) and is capable of driving the rotating gear (8) to rotate; The lifting mechanism includes: Rotating wheel (13), the rotating wheel (13) is set at the bottom of the container (2) by a support assembly, and a plurality of protrusions (14) are fixedly connected to the circumferential surface of the rotating wheel (13). Drive groove (15): The circumferential surface of the rotating rod (7) is provided with a plurality of drive grooves (15) that match the protrusion (14), and the protrusion (14) engages with the drive groove (15). The second motor (16) is located at the bottom of the container (2), and the output end of the second motor (16) is fixedly connected to the rotating wheel (13); During the discharge process, the lifting mechanism drives the rotating rod (7) and the stirring plate (3) to move, thereby scraping off the tomatoes that are stuck to the inner wall of the container (2).

2. The tomato sauce mixing and blending equipment according to claim 1, characterized in that, The driving component includes: A fixing frame (10) is fixedly connected to the bottom end of the container (2); A drive gear (11) is rotatably connected inside the fixed frame (10), and the drive gear (11) meshes with the rotating gear (8); The first motor (12) is installed at the bottom of the fixed frame (10), and the output end of the first motor (12) passes through the fixed frame (10) and is axially fixedly connected to the drive gear (11).

3. The tomato sauce mixing and blending equipment according to claim 1, characterized in that, The mobile mechanism includes: A stabilizing frame (17) is fixedly connected to one side of the container (2); Slide rod (18), two slide rods (18) are provided, both slide rods (18) are slidably connected to the top of the stabilizer (17), and the cleaning plate (5) is fixedly connected to one end of the two slide rods (18); A pusher frame (19) is fixedly connected to the other end of the two slide rods (18); A power assembly, which is mounted on the stabilizer (17), is capable of driving the slide bar (18) to move on the stabilizer (17).

4. The tomato sauce mixing and blending equipment according to claim 3, characterized in that, The power assembly includes: A movable screw (20) is rotatably connected to one side of the stabilizer (17). A screw hole is provided on the pusher (19), and the movable screw (20) is threaded into the screw hole. The third motor (21) is installed on the other side of the stabilizer (17). The output end of the third motor (21) passes through the stabilizer (17) and is fixedly connected to one end of the moving screw (20).

5. The tomato sauce mixing and blending equipment according to claim 1, characterized in that, The flipping mechanism includes: Two rotating shafts (22) are provided, and both rotating shafts (22) are rotatably connected inside the frame (1). The container (2) is fixedly connected between the rotating shafts (22). A reversing gear (23) is fixedly connected to one of the rotating shafts (22); A power gear (24) meshes with the reversing gear (23); The fourth motor (25) is installed on one side of the frame (1), and the output end of the fourth motor (25) passes through the frame (1) and is fixedly connected to the power gear (24).

6. The tomato sauce mixing and blending equipment according to claim 1, characterized in that, The support components include: Support plate (26), two support plates (26) are provided, and both support plates (26) are fixedly connected to the bottom end of the container (2); A support shaft (27) is rotatably connected between two support plates (26). A rotating wheel (13) is fixedly connected to the support shaft (27). A second motor (16) is mounted on one of the support plates (26). The output end of the second motor (16) passes through the support plate (26) and is fixedly connected to one end of the support shaft (27).

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