Snow throwing barrel, snow removing device and snow removing equipment

Abstract

The utility model relates to equipment for removing ice and snow by using driving equipment, in particular to a snow throwing barrel, a snow removing device and snow removing equipment, which are used for solving the technical problem that the existing snow throwing barrel is difficult to simultaneously meet the requirements of snow throwing angle adjustment flexibility and reliable operation in a low-temperature environment. The snow throwing barrel comprises a barrel body, a cover body, a pitching driving device, a connecting shaft and a limiting assembly. According to the utility model, the pitch driving device is combined with a rigid control structure of the connecting shaft, so that the adjustment of the snow throwing angle is accurately controlled by active driving, the forward, reverse and continuous adjustment of the adjustment action can be realized, the requirements of complex terrains and operation are met, and the technical problem that an elastic reset piece cannot reliably operate in a low-temperature environment is solved; in addition, the limiting assembly definitely limits the moving range of the cover body, and clamping or damage caused by excessive rotation is avoided. Compared with the prior art, the adjusting device is higher in adjusting precision, wider in adjusting range and simpler and more convenient to operate.

Description

Technical Field

[0001] This utility model relates to a device for removing ice and snow using a driving device, and particularly to a snow-throwing tube, a snow removal device, and a snow removal equipment. Background Technology

[0002] Chinese patent CN220977849U discloses a snow-throwing tube, which includes a tube body, a cover, an adjusting component, and an elastic reset component. The adjusting component is used to adjust the angle of the cover relative to the tube body, thereby controlling the snow-throwing direction. The elastic reset component (such as a tension spring) is used to reset the cover without external force. Although this patent achieves adjustable snow-throwing angle, it has the following problems:

[0003] (1) When the adjustment parts are exposed to low temperature environment, they are easily covered by splashed snow water and frozen at low temperature, which causes the device to jam or even fail to rotate, greatly increasing the operating resistance, thereby aggravating the wear of the parts and shortening the service life.

[0004] (2) Elastic reset components such as tension springs have significantly reduced elastic modulus in low-temperature environments and are prone to fatigue failure under repeated bending stress, affecting the reliable reset capability and long-term stability of the system.

[0005] In summary, existing snow-throwing tubes are still unable to simultaneously meet the requirements of flexible snow-throwing angle adjustment and reliable operation in low-temperature environments. Utility Model Content

[0006] The present invention aims to provide a snow-throwing tube, a snow removal device, and a snow removal equipment, which can solve the technical problem that existing snow-throwing tubes cannot simultaneously meet the requirements of flexible snow-throwing angle adjustment and reliable operation in low-temperature environments.

[0007] A snow thrower includes a cylinder and a cover; the two ends of the cylinder are a snow inlet and a snow outlet, respectively, and the snow outlet is hinged to the cover, forming a continuous snow throwing channel between the cylinder and the cover.

[0008] Its special feature is that it also includes a pitch drive device, a connecting shaft, and a limiting assembly installed on the outer wall of the cylinder.

[0009] The two ends of the connecting shaft are an input end and an output end, respectively. The input end is connected to the driving end of the pitch drive device, and the output end is hinged to the cover.

[0010] The limiting component includes a fixing block disposed on the outer wall of the cylinder and a limiting block connected to the input end. The limiting block is used to abut against the fixing block to limit the rotation of the cover relative to the cylinder.

[0011] Optionally, it also includes a mounting base, which is disposed on the outer wall of the cylinder, and the mounting base is provided with a first through hole and the fixing block;

[0012] The limiting block is provided with a first rotating through hole and a second rotating through hole;

[0013] The pitch drive device is fixed on the mounting base, and the drive end passes through the first through hole and is connected to the inner wall of the first rotation through hole;

[0014] The inner wall of the second rotating through hole is connected to the output end of the connecting shaft via a transmission shaft.

[0015] Optionally, the limiting block is provided with an upper limit protrusion, a middle slide, and a lower limit protrusion in sequence along the rotation direction of the limiting block on the side wall near the fixed block.

[0016] The central slide is arc-shaped, with its center located at the first rotating through hole.

[0017] Optionally, the limiting component further includes a limiting sensing device disposed on the outer wall of the cylinder, used to limit the cover when it rotates to the maximum downward angle and the maximum upward angle.

[0018] Optionally, the limiting sensing device includes two Hall sensors disposed on the mounting base and symmetrically distributed on both sides of the fixed block, and a magnet disposed on the extension line of the line connecting the first rotating through hole and the second rotating through hole.

[0019] Optionally, the cover is provided with a hinge seat, which includes two hinge plates symmetrically arranged along the connecting axis;

[0020] Each of the hinge plates is triangular; the output end of the connecting shaft is hinged to one corner of the two hinge plates.

[0021] Optionally, the snow-throwing channel includes an inlet straight section, a curved section, and an end straight section connected sequentially from the snow inlet end to the snow outlet end.

[0022] Optionally, a leak-proof reinforcement component is provided at the hinge joint between the snow outlet end and the cover body. The leak-proof reinforcement component includes a leak-proof plate disposed on the inner wall of the cylinder and extending out of the snow outlet end, and a reinforcing rib disposed on the leak-proof plate and the inner wall of the cylinder. The leak-proof plate and the reinforcing rib are both adapted to the inner wall of the cylinder, and the protruding end of the leak-proof plate does not exceed the rotation axis of the cylinder.

[0023] The outer wall of the cylinder is provided with an outer shell, and a protective cavity is formed between the inner wall of the outer shell and the outer wall of the cylinder; the pitch drive device, the connecting shaft and the limiting assembly are located inside the protective cavity;

[0024] The connecting shaft is arc-shaped.

[0025] This utility model also provides a snow removal device, which is characterized in that it includes a snow collection chamber, a snow throwing chamber, and the aforementioned snow throwing tube connected in sequence.

[0026] This utility model also provides a snow removal device, which is characterized in that it includes a self-moving device and the aforementioned snow removal device.

[0027] Compared with the prior art, the beneficial effects of this utility model are:

[0028] (1) This utility model provides a snow-throwing tube, including a tube body, a cover body, a pitch drive device, a connecting shaft, and a limiting component. Through the rigid control structure of the pitch drive device and the connecting shaft, this utility model enables the snow-throwing angle to be precisely controlled by active drive, and the adjustment action can achieve forward, reverse, and continuous adjustment to meet the requirements of complex terrain and operations, and solves the technical problem that the elastic reset component cannot operate reliably in low-temperature environments. In addition, the limiting component clearly limits the range of motion of the cover body to avoid jamming or damage caused by excessive rotation. Compared with the prior art, this utility model has higher adjustment accuracy, wider adjustment range, and simpler operation.

[0029] (2) In this utility model, the pitch drive device, connecting shaft and limiting component can be set in the protective cavity to ensure long-term reliable operation in harsh environments such as ice and snow, high humidity and low temperature.

[0030] (3) In this utility model, the pitch drive device is directly connected to the first rotating through hole of the limit block through the first through hole to form an integrated transmission. The output end of the connecting shaft is connected to the second rotating through hole through the transmission shaft to further transmit the power to the cover body in a stable manner, realizing a rigid transmission chain with rapid and reliable action response. In addition, the pitch drive device and the limit component are concentrated in the mounting base area, which facilitates sealed integration.

[0031] (4) In this utility model, the limiting block is provided with an upper limit protrusion, a middle slide, and a lower limit protrusion in sequence according to the rotation direction, and the middle slide is an arc-shaped trajectory with the first rotation through hole as the center; the upper limit protrusion and the lower limit protrusion form a clear angle boundary, ensuring that the angle adjustment range is accurate and controllable, and preventing over-rotation or mechanical interference due to misoperation or external force; the middle slide ensures that the limiting block rotates smoothly along a fixed path throughout the adjustment process, effectively preventing shaking or jamming.

[0032] (5) In this utility model, limit blocks and fixed blocks are used to provide physical boundary protection, and the sensing limit device provides electrical control early warning and precise action termination command; the dual limit mechanism complements each other in critical working conditions, ensuring that there is still backup protection when electrical control fails or physical failure occurs, greatly improving the safety factor of equipment operation. Attached Figure Description

[0033] Figure 1 This is an isometric view of an embodiment of a snow-throwing tube according to the present invention. Figure 1 ;

[0034] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0035] Figure 3 Axonometric diagram of an embodiment of this utility model Figure 2 ;

[0036] Figure 4 This is a schematic diagram showing the position of the Hall sensor in an embodiment of this utility model;

[0037] Figure 5 This is an exploded view of an embodiment of the present utility model;

[0038] Figure 6 for Figure 5 Enlarged view of point B in the middle.

[0039] The reference numerals in the attached drawings are explained as follows: 10-Cylinder body, 11-Snow inlet end, 12-Snow outlet end, 13-Leak-proof reinforcement component, 131-Leak-proof plate, 132-Reinforcing rib; 20-Cover body, 21-Top cover, 22-Side cover, 23-Groove; 30-Pitch drive device, 31-Drive end; 40-Connecting shaft, 41-Input end, 42-Output end; 50-Limiting component, 51-Fixing block, 52-Limiting block, 521-First rotating through hole, 522-Second rotating through hole, 523-Upper limit protrusion, 524-Middle slide, 525-Lower limit protrusion, 53-Hall sensor; 6-Hinge; 70-Mounting base, 71-First through hole, 71-First mounting hole; 8-Drive shaft; 9-Hinge base. Detailed Implementation

[0040] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0041] Reference Figures 1-6 This utility model provides a snow thrower, including a cylinder body 10, a cover body 20, and a pitch drive device 30, a connecting shaft 40 and a limiting component 50 disposed on the outer wall of the cylinder body 10.

[0042] The cylinder 10 is used to guide the snow and throw it outwards in a concentrated manner. The two ends of the cylinder 10 are the snow inlet end 11 and the snow outlet end 12, respectively. The snow inlet end 11 is used to connect to the snow removal equipment. For easy connection, the snow inlet end 11 can be provided with a flange interface. The snow outlet end 12 is hinged to the cover 20, so that the cylinder 10 and the cover 20 form a continuous snow throwing channel. When the cover 20 rotates relative to the cylinder 10, the snow throwing path defined by the snow throwing channel changes.

[0043] Understandably, the snow removal equipment is a device that removes snow from the working surface mechanically; according to the snow removal method, it can be divided into roller brush + fan type, spiral scraper type, blower suction type, etc.; according to the power method, it can be divided into equipment that does not require external power to move and can move autonomously or semi-autonomously, and equipment that is pushed manually.

[0044] The cylinder 10 has an opening on one side, and its cross-section (perpendicular to the snow flow direction) is arc-shaped, while its longitudinal section (along the snow flow direction) is a gradually curved surface, in order to guide the snow flow, reduce impact loss, and avoid dead corners and snow accumulation.

[0045] In other embodiments, the cylinder 10 may also be provided with reinforcing ribs / reinforcing rings to improve the overall resistance to deformation.

[0046] The cover 20 has an opening on one side, matching the snow outlet end 12 of the cylinder 10. Specifically, the cover 20 includes a top cover 21 and side covers 22 symmetrically arranged on both sides of the top cover 21. The top cover 21 is ridge-shaped, composed of two symmetrical arc surfaces. The arc surfaces can form a "top pressure channel" for the snow flow, preventing the snow flow from scattering upwards and guiding it outwards along the arc surfaces. Each side cover 22 is a right-angled trapezoid, with its long side connected to the top cover 21. The right-angled trapezoid ensures a converging guiding effect with a wide bottom and a narrow top, which is beneficial for concentrating the snow stream and is easy to manufacture. In other embodiments, the cover 20 can also adopt other structures. For example, the diameter of the cover 20 decreases in the direction away from the cylinder 10, forming a parabolic or contracting conical profile, which enhances the jetting effect through compression; or, the end of the cover 20 away from the cylinder 10 is bent inwards to control the projection angle.

[0047] The snow outlet end 12 of the cylinder 10 is hinged to the cover 20. The hinge structure can be a butterfly hinge, a pin hinge, a joint connection with bearings, etc. In this embodiment, a butterfly hinge is used to enable the cover 20 to swing significantly.

[0048] To prevent snow leakage, the top cover 21 has a groove 23 at the hinge end. The snow outlet end 12 of the cylinder 10 is hinged to the cover 20 through a hinge 6. The hinge 6 is located in the groove 23, and its two ends are respectively embedded in the opposite side walls of the groove 23. Specifically, in this embodiment, one side of the butterfly hinge is located in the groove 23 and fixed to the outer wall of the cylinder 10, the hinge shaft is located on the bottom surface of the groove 23, and the other side of the hinge is fixed to the inner wall of the cover 20.

[0049] The two ends of the connecting shaft 40 are an input end 41 and an output end 42, respectively. The input end 41 is connected to the driving end 31 of the pitch drive device 30, and the output end 42 is hinged to the cover 20. The limiting component 50 includes a fixing block 51 disposed on the outer wall of the cylinder 10 and a limiting block 52 connected to the input end 41. The limiting block 52 is used to abut against the fixing block 51 to limit the rotation of the cover 20 relative to the cylinder 10.

[0050] Understandably, the pitch drive device 30 is used to drive the cover 20 to rotate relative to the cylinder 10 via the connecting shaft 40. It can be a worm gear reducer motor, a pneumatic cylinder drive motor, a servo motor, etc. The connecting shaft 40 is used to transmit the power output from the pitch drive device 30 to the cover 20. Its structure can be a solid shaft or a hollow shaft, and its radial cross-section can be cylindrical, hexagonal, rectangular, or a shaft with an external key, etc. The material can be stainless steel (such as SUS304, SUS316), coated alloy steel (such as galvanized 42CrMo), aluminum alloy (such as 6061-T6), etc. In this embodiment, the radial cross-section of the connecting shaft 40 is rectangular. The fixing block 51 serves as the stationary end and is installed on the outer wall of the cylinder 10. The limiting block 52 is connected to the input end 41 of the connecting shaft 40, and the connecting shaft 40 rotates. When the cover 20 rotates to its limit position with the connecting shaft 40, the limiting block 52 contacts the fixing block 51, forming a physical limit to prevent excessive rotation or impact. The structure of the fixing block 51 and the limiting block 52 can be as follows: both the fixing block 51 and the limiting block 52 are protruding lugs (such as metal blocks / plates) that collide head-on when rotating to the limit, or the fixing block 51 is a stop with a groove 23 and the limiting block 52 is a tongue or pin structure that inserts into the groove to form a limit when rotated to the limit position, etc.

[0051] In some embodiments, refer to Figure 1 , Figure 3 , Figure 5 The snow-throwing channel includes an inlet straight section (curvature of 0), a curved section (curvature of non-0), and an end straight section (curvature of 0) connected sequentially from the snow inlet end 11 to the snow outlet end 12; the inlet straight section and the curved section, and the curved section and the end straight section can be connected in segments (curvature abrupt change) or smoothly transitioned (such as a Bezier curve);

[0052] Understandably, the inlet straight section has a curvature of 0 to reduce impact and facilitate docking with external equipment, making the structure easy to manufacture; the curved section has a curvature of a constant circular arc or a gradually changing curve to control the snow throwing direction and smoothness; the end straight section has a curvature of 0 to direct the snow flow, improve the throwing distance and accuracy, and prevent streamline interference or eddies at the outlet. The combination of the inlet straight section, curved section, and end straight section helps to achieve more flexible snow throwing direction adjustment.

[0053] In some embodiments, the inlet section is vertically upward, which can make full use of the upward throwing inertia, making the snow flow into the snow throwing tube more smoothly, thereby reducing the kinetic energy of the snow and shortening the throwing distance.

[0054] In some embodiments, refer to Figures 5-6It also includes a mounting base 70, which is disposed on the outer wall of the cylinder 10. The mounting base 70 is provided with a first through hole 71 and the fixing block 51. Specifically, the fixing block 51 is fixed to the mounting base 70 through the first mounting hole 72 provided on the mounting base 70.

[0055] The limiting block 52 is provided with a first rotating through hole 521 and a second rotating through hole 522; the pitch drive device 30 is fixed on the mounting base 70, and the drive end 31 passes through the first through hole 71 and is connected to the inner wall of the first rotating through hole 521; the inner wall of the second rotating through hole 522 is connected to the output end 42 of the connecting shaft 40 through the transmission shaft 8.

[0056] The working principle is as follows: The pitch drive device 30 outputs power from the drive end 31 to the limit block 52 (from the first rotation through hole 521 to the second rotation through hole 522), the connecting shaft 40 (from the input end 41 to the output end 42), and the cover 20 in sequence, so as to realize the rotation of the cover 20 relative to the cylinder 10.

[0057] Understandably, the mounting base 70 is fixed to the outer wall of the cylinder 10, serving as a support platform for transmission and limiting; the limiting block 52 is an intermediate transmission component located between the pitch drive device 30 and the connecting shaft 40, realizing the dual functions of torque transmission and limiting rotation. Its first rotation through hole 521 is used to couple with the output end 42 of the pitch drive device 30, and its second rotation through hole 522 is used to connect to the input end 41 of the connecting shaft 40. This invention integrates the drive, limiting, and connecting shaft 40 into a single unit, reducing the number of parts and improving reliability.

[0058] In some embodiments, refer to Figure 2 , Figure 6 The limiting block 52 is provided with an upper limit protrusion 523, a middle slide 524, and a lower limit protrusion 525 in sequence along the rotation direction of the limiting block 52 near the side wall of the fixed block 51. The middle slide 524 is arc-shaped and its center is located in the first rotation through hole 521. The middle slide 524 is kept in contact with the side wall of the fixed block 51 within the normal pitch range, providing continuous support and guidance.

[0059] Understandably, the upper limit protrusion 523 contacts the fixing block 51 when the cover 20 rotates to the maximum upward angle to prevent excessive tilting; the lower limit protrusion 525 contacts the fixing block 51 when the cover 20 rotates to the maximum downward angle to prevent excessive drooping.

[0060] The sidewall of the fixing block 51 is curved to match the middle slide rail 524 and achieve linear fit. In other embodiments, the sidewall of the fixing block 51 includes three segments connected in sequence: an upper stop surface (corresponding to the upper limit protrusion 523), a middle guide arc surface (corresponding to the middle slide rail 524), and a lower stop surface (corresponding to the lower limit protrusion 525). Each segment can be made of different materials or angles to handle different working conditions.

[0061] In some embodiments, refer to Figure 6 The limiting component 50 also includes a limiting sensing device for limiting the cover 20 when it rotates to the maximum downward angle and the maximum upward angle.

[0062] Specifically, refer to Figure 3 The limiting sensing device includes Hall sensors 53 disposed on the mounting base 70 and symmetrically distributed on both sides of the fixed block 51; the limiting block 52 is provided with a magnet on the extension line of the line connecting the first rotating through hole 521 and the second rotating through hole 522.

[0063] The working principle is as follows: when the limit block 52 rotates, it drives the magnet to approach the Hall sensor 53; when the magnetic field approaches a certain threshold (i.e., close to the preset limit position), the Hall sensor 53 outputs a signal; this signal is used to cause the pitch drive device 30 to decelerate or stop in advance.

[0064] In other embodiments, the limit sensing device may also employ a combination of photoelectric sensor and light shield to improve control sensitivity, or a combination of magnetic encoder and magnetic ring to improve angular accuracy.

[0065] In some embodiments, refer to Figure 1 , Figures 3-5 The cover 20 is provided with a hinge seat 9, which includes two hinge plates symmetrically arranged along the connecting axis 40.

[0066] Each of the hinge plates is triangular; the output end 42 of the connecting shaft 40 is hinged to one corner of the two hinge plates; when the connecting shaft 40 drives one corner to move, the entire cover 20 can rotate smoothly using this as a fulcrum, preventing tilting or shaking; and the two symmetrically arranged hinge plates can distribute the force evenly, improving torsional resistance and service life.

[0067] In some embodiments, refer to Figure 1 , Figures 3-5 A leak-proof reinforcing component 13 is provided at the hinge point between the snow outlet end 12 and the cover body 20. The leak-proof reinforcing component 13 includes a leak-proof plate 131 disposed on the inner wall of the cylinder 10 and extending out of the snow outlet end 12, and a reinforcing rib 132 disposed on the leak-proof plate 131 and the inner wall of the cylinder 10. The leak-proof plate 131 and the reinforcing rib 132 are both adapted to the inner wall of the cylinder 10, and the protruding end of the leak-proof plate 131 does not exceed the rotation axis of the cylinder 10.

[0068] Understandably, the leak-proof plate 131 covers the hinge gap between the cover 20 and the cylinder 10. When snow is sprayed outward through the snow throwing channel, it effectively prevents snow powder and ice fragments from leaking out from the hinge gap, avoiding uneven spraying and energy loss. Furthermore, its position is controlled, and its protruding portion will not exceed the rotation axis of the cylinder 10, ensuring that it does not interfere with the rotation angle range of the cover 20. The reinforcing rib 132 is positioned between the leak-proof plate 131 and the inner wall of the cylinder 10, providing support and resistance to pressure, enhancing the stability of the leak-proof plate 131 under the impact of high-speed snow flow, and preventing deformation and tearing of the plate. Moreover, the reinforcing rib 132 is arranged close to the inner wall of the cylinder 10, improving the structural strength and fatigue resistance of the snow outlet area 132.

[0069] The outer wall of the cylinder 10 is provided with an outer shell (not shown in the figure), and a protective cavity is formed between the inner wall of the outer shell and the outer wall of the cylinder 10; the pitch drive device 30, the connecting shaft 40 and the limiting component 50 are located in the protective cavity.

[0070] Understandably, the protective cavity is a closed or semi-closed space formed between the inner wall of the outer shell and the outer wall of the cylinder 10, used for frost, water, and snow protection to improve structural lifespan and reliability. Heating wires / heating plates can be embedded within the protective cavity to prevent freezing, or sensors can be installed to monitor angle, jamming, and temperature. The outer shell can be divided into two or more independent parts, such as a fixed shell section (installed on the outer wall of the cylinder 10 and stationary with the cylinder 10) combined with a movable shell section (installed on the outer wall of the cover 20 and rotating with the cover 20).

[0071] The connecting shaft 40 is curved because a straight connecting shaft is subject to spatial rigidity constraints, and its pitch angle is passively limited, generally difficult to exceed -2° to 0°. However, the curved shape of the connecting shaft 40 can avoid interference with the outer shell. In this embodiment, the pitch angle can be as low as -5°.

[0072] This utility model provides a snow removal device, including a snow collection chamber, a snow throwing chamber, and the aforementioned snow throwing tube connected in sequence.

[0073] Understandably, the snow collection chamber is responsible for collecting snow from the ground, initially gathering and compacting the snow flow; the snow throwing chamber is used to further pressurize, accelerate, and guide the snow flow towards the snow throwing tube; and the snow throwing tube is used to finally guide and throw the snow bundle. Depending on the snow removal method, the structures of the snow collection chamber and the snow throwing chamber can be combined in different ways. For example, if the snow removal method is a roller brush + fan type, a horizontal roller brush can be installed in the snow collection chamber, and a fan can be installed in the snow throwing chamber; if the snow removal method is a spiral scraping type, a double spiral structure can be installed in the snow collection chamber, and a fan or a single spiral pressurization structure can be installed in the snow throwing chamber.

[0074] This utility model provides a snow removal device, including a self-moving device and the aforementioned snow removal device.

[0075] Understandably, self-moving equipment refers to a chassis platform with an independent power system and mobility, used to carry and drive equipment to move and operate on the ground. Its forms include wheeled, tracked or other controllable mobile mechanisms, which can realize manual or automatic operation functions.

[0076] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. For those skilled in the art, modifications can be made to the specific technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions protected by the present invention.

Claims

1. A snow thrower, comprising a cylinder (10) and a cover (20); the two ends of the cylinder (10) are a snow inlet end (11) and a snow outlet end (12) respectively, the snow outlet end (12) is hinged to the cover (20), and the cylinder (10) and the cover (20) form a continuous snow throwing channel; Its features are: It also includes a pitch drive device (30), a connecting shaft (40) and a limiting assembly (50) disposed on the outer wall of the cylinder (10); The two ends of the connecting shaft (40) are an input end (41) and an output end (42), respectively. The input end (41) is connected to the driving end (31) of the pitch drive device (30), and the output end (42) is hinged to the cover (20). The limiting component (50) includes a fixing block (51) disposed on the outer wall of the cylinder (10) and a limiting block (52) connected to the input end (41). The limiting block (52) is used to abut against the fixing block (51) to limit the rotation of the cover (20) relative to the cylinder (10).

2. A snow-throwing tube according to claim 1, characterized in that: It also includes a mounting base (70), which is disposed on the outer wall of the cylinder (10). The mounting base (70) is provided with a first through hole (71) and the fixing block (51). The limiting block (52) is provided with a first rotating through hole (521) and a second rotating through hole (522); The pitch drive device (30) is fixed on the mounting base (70), and the drive end (31) passes through the first through hole (71) and is connected to the inner wall of the first rotating through hole (521); The inner wall of the second rotating through hole (522) is connected to the output end (42) of the connecting shaft (40) via the transmission shaft (8).

3. A snow-throwing tube according to claim 2, characterized in that: The limiting block (52) is provided with an upper limit protrusion (523), a middle slide (524), and a lower limit protrusion (525) in sequence along the rotation direction of the limiting block (52) on the side wall near the fixed block (51). The central slide (524) is arc-shaped, and its center is located at the first rotating through hole (521).

4. A snow-throwing tube according to claim 3, characterized in that: The limiting component (50) also includes a limiting sensing device disposed on the outer wall of the cylinder, used to limit the cover (20) when it rotates to the maximum downward angle and the maximum upward angle.

5. A snow-throwing tube according to claim 4, characterized in that: The limiting sensing device includes two Hall sensors (53) disposed on the mounting base (70) and symmetrically distributed on both sides of the fixing block (51), and a magnet disposed on the extension line of the line connecting the first rotating through hole (521) and the second rotating through hole (522).

6. A snow-throwing tube according to claim 5, characterized in that: The cover (20) is provided with a hinge seat (9), which includes two hinge plates symmetrically arranged along the connecting axis (40); Each of the hinge plates is triangular; the output end (42) of the connecting shaft (40) is hinged to one corner of the two hinge plates.

7. A snow-throwing tube according to claim 1, characterized in that: The snow-throwing channel includes an inlet straight section, a curved section, and an end straight section connected sequentially from the snow inlet end (11) to the snow outlet end (12).

8. A snow-throwing tube according to claim 1, characterized in that: A leak-proof reinforcement component (13) is provided at the hinge joint between the snow outlet end (12) and the cover (20). The leak-proof reinforcement component (13) includes a leak-proof plate (131) provided on the inner wall of the cylinder (10) and extending out of the snow outlet end (12), and a reinforcing rib (132) provided on the leak-proof plate (131) and the inner wall of the cylinder (10). The leak-proof plate (131) and the reinforcing rib (132) are both adapted to the inner wall of the cylinder (10), and the protruding end of the leak-proof plate (131) does not exceed the rotation axis of the cylinder (10). The outer wall of the cylinder (10) is provided with an outer shell, and a protective cavity is formed between the inner wall of the outer shell and the outer wall of the cylinder (10); the pitch drive device (30), the connecting shaft (40) and the limiting component (50) are located in the protective cavity; The connecting shaft (40) is arc-shaped.

9. A snow removal device, characterized in that: It includes a snow collection chamber, a snow throwing chamber, and a snow throwing tube as described in any one of claims 1 to 8, connected in sequence.

10. A snow removal device, characterized in that: Includes self-moving devices and the snow removal device as described in claim 9.

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