A suction nozzle and a road sweeper

Abstract

The embodiment of the utility model provides a kind of suction nozzle and road sweeper, it is related to road sweeper field.The suction nozzle is used for road sweeper, it includes suction nozzle body and rotating shaft structure, rotating shaft structure is connected in suction nozzle body, rotating shaft structure includes rotating shaft, first bearing, first rotary seat, reset piece, driving part, second bearing and second rotary seat, first bearing is sleeved in rotating shaft, first rotary seat is sleeved in first bearing, first rotary seat is connected by first bearing and rotating shaft, first rotary seat includes connecting plate, reset piece and connecting plate are connected, and reset piece is used to and water jet rod is connected, driving part and connecting plate are connected to drive connecting plate movement, second bearing is sleeved in rotating shaft, and second bearing and first bearing are up and down distribution.First rotary seat and second rotary seat form up and down structure by first bearing and second bearing, reduce the overall outline dimension of rotating shaft structure, reduce the number of bearing, simplify overall structure, realize light weight design.

Description

Technical Field

[0001] This utility model relates to the field of road sweeper technology, and more specifically, to a suction nozzle and a road sweeper. Background Technology

[0002] With the increasing demand for urban sanitation, small road sweepers have been widely used in municipal cleaning due to their flexibility and efficiency. In existing technologies, the rotating shaft structure, as a key component of the road sweeper, directly affects the vehicle's performance and applicability. Existing rotating shaft structures include inner and outer double-layer rotating seats. The inner rotating seat connects to the rotating shaft via bearings, and the outer rotating seat connects to the inner rotating seat via bearings. While this design provides stable support and rotation, it also results in a complex structure and large size. For small road sweepers weighing 1-4 tons, this structure not only increases manufacturing costs but also limits the overall layout and flexibility of the vehicle, making existing rotating shaft structures difficult to meet the actual needs of small road sweepers.

[0003] Therefore, there is an urgent need for a small rotating shaft structure to overcome the shortcomings of existing technologies. Utility Model Content

[0004] This utility model provides a suction nozzle and a road sweeper, which can reduce the size, simplify the structure, and achieve a lightweight design.

[0005] The embodiments of this utility model can be implemented as follows:

[0006] An embodiment of this utility model provides a suction nozzle for a road sweeper, comprising:

[0007] The suction nozzle itself;

[0008] A rotating shaft structure is connected to the nozzle body, the rotating shaft structure comprising:

[0009] Rotation axis;

[0010] A first bearing is sleeved on the rotating shaft;

[0011] First rotating seat;

[0012] The first rotating seat includes a seat body and a connecting plate. The seat body is sleeved on the first bearing, and the connecting plate is connected to the outer surface of the seat body.

[0013] A driving component, which is connected to the connecting plate, is used to drive the base body to rotate around the rotation axis via the connecting plate;

[0014] The second bearing is sleeved on the rotating shaft, and the second bearing and the first bearing are arranged vertically.

[0015] The second rotating seat includes a connecting ring and a rod. The connecting ring is sleeved on the second bearing. One end of the rod is connected to the outer surface of the second rotating seat body, and the other end of the rod is used to connect to the water spray rod.

[0016] A reset component, which is connected to the connecting plate, and the reset component is used to connect to the rod body or the water spray rod;

[0017] A buffer block is mounted on the base or the connecting plate. A mating block is mounted on the outer surface of the connecting ring. The buffer block is used to contact the mating block when the reset member drives the water spray bar to reset, so as to limit the movement; and / or,

[0018] The buffer block is used to contact the mating block when the drive member is extended, thereby driving the second rotating seat to rotate and retract the water spray bar.

[0019] Optionally, the housing is interference-fitted or transition-fitted with the first bearing.

[0020] Optionally, the surface of the rotating shaft is provided with a groove at a position corresponding to the first bearing, the groove being used to reduce the friction between the rotating shaft and the first bearing.

[0021] Optionally, the connecting ring is interference-fitted or transition-fitted with the second bearing.

[0022] Optionally, the nozzle further includes an end cap, which is disposed above the connecting ring and detachably connected to the connecting ring.

[0023] Optionally, the number of the second bearings is two, and the inner wall of the connecting ring is provided with an annular recess. The number of the annular recesses is adapted to the number of the second bearings, and the two second bearings are respectively disposed in the two annular recesses and abut against the annular recesses.

[0024] Optionally, the rotating shaft structure further includes a first sealing ring, which is disposed between the rotating shaft and the seat, and located below the first bearing.

[0025] Optionally, the rotating shaft structure further includes a second sealing ring, which is disposed between the connecting ring of the first bearing and the second rotating seat, and is located above the seat body.

[0026] Optionally, the friction coefficient of the first bearing is less than or equal to the friction coefficient of the second bearing.

[0027] An embodiment of this utility model also provides a road sweeper, including a vehicle body, a water spray bar, and a suction nozzle. The suction nozzle is installed on the vehicle body, and the water spray bar is connected to the rotating shaft structure. The rotating shaft structure is used to drive the water spray bar to swing out or retract relative to the vehicle body.

[0028] Optionally, the nozzle further includes a second rotating seat, one end of which is interference-fitted with the second bearing, and the other end of which is connected to the water spray bar.

[0029] The beneficial effects of the suction nozzle and road sweeper of this utility model embodiment include, for example:

[0030] This suction nozzle is used in a road sweeper and includes: a suction nozzle body, a rotating shaft structure, and a buffer block. The rotating shaft structure is connected to the suction nozzle body. The rotating shaft structure includes a rotating shaft, a first bearing, a first rotating seat, a reset component, a drive component, a second bearing, and a second rotating seat. The first bearing is sleeved on the rotating shaft. The first rotating seat includes a seat body and a connecting plate. The seat body is sleeved on the first bearing, and the connecting plate is connected to the outer surface of the seat body. The drive component is connected to the connecting plate and is used to drive the seat body to rotate around the rotating shaft through the connecting plate. The second bearing is sleeved on the rotating shaft, and the second bearing and the first bearing are positioned vertically. The second rotating seat comprises a connecting ring and a rod. The connecting ring is fitted onto a second bearing. One end of the rod is connected to the outer surface of the second rotating seat body, and the other end is used to connect to the spray bar. A reset component is connected to a connecting plate and is used to connect to the rod or the spray bar. A buffer block is installed on the seat body or the connecting plate. A mating block is installed on the outer surface of the connecting ring. The buffer block is used to contact the mating block when the reset component drives the spray bar to reset, for limiting the movement; and / or, the buffer block is used to contact the mating block when the driving component extends, thereby driving the second rotating seat to rotate and retract the spray bar. In use, the second bearing and the first bearing of the rotating shaft structure are arranged vertically. The first rotating seat is fitted onto the first bearing and connected to the rotating shaft through the first bearing. The second rotating seat is fitted onto the second bearing and connected to the rotating shaft through the second bearing. The first and second rotating seats also form a vertical structure through the first and second bearings, reducing the overall size of the rotating shaft structure, reducing the number of bearings, simplifying the overall structure, achieving lightweight design, and reducing production costs.

[0031] The sweeper truck includes a vehicle body, a water spray boom, and a suction nozzle. The suction nozzle is mounted on the vehicle body. The water spray boom is connected to a rotating shaft structure, which drives the water spray boom to swing out or retract relative to the vehicle body. The swinging out or retraction of the water spray boom on the vehicle body is achieved through the rotating shaft structure. The second bearing and the first bearing of the rotating shaft structure are arranged vertically. A first rotating seat is fitted onto the first bearing and connected to the rotating shaft via the first bearing. A second rotating seat is fitted onto the second bearing and connected to the rotating shaft via the second bearing. The first and second rotating seats also form a vertical structure through the first and second bearings, reducing the overall size of the rotating shaft structure, reducing the number of bearings, simplifying the overall structure, achieving lightweight design, and reducing production costs. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a first-view structural diagram of the sweeper truck provided in this embodiment;

[0034] Figure 2 This is a structural schematic diagram of the road sweeper provided in this embodiment from a second perspective;

[0035] Figure 3 This is a third-view structural diagram of the sweeper truck provided in this embodiment;

[0036] Figure 4 This is a first-view structural schematic diagram of the suction nozzle provided in this embodiment;

[0037] Figure 5 This is a structural schematic diagram of the suction nozzle provided in this embodiment from a second perspective;

[0038] Figure 6 This is a third-view structural diagram of the suction nozzle provided in this embodiment;

[0039] Figure 7 This is a structural schematic diagram of the suction nozzle provided in this embodiment from a fourth perspective;

[0040] Figure 8 This is a structural schematic diagram of the nozzle provided in this embodiment from a fifth perspective.

[0041] Icons: 10-Rotating shaft; 11-Shaft body; 12-Mounting seat; 20-First bearing; 30-Second bearing; 40-First rotating seat; 41-Seat body; 42-Connecting plate; 401-Groove; 402-Oil passage hole; 50-First sealing ring; 60-Drive component; 70-Second rotating seat; 71-Rod body; 72-Connecting ring; 721-Annular recess; 73-Matching block; 80-Reset component; 90-Buffer block; 100-End shaft baffle; 110-End cover; 120-Second sealing ring; 1000-Rotating shaft structure; 2000-Water spray bar; 3000-Vehicle body. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0043] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0044] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0045] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0046] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0047] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0048] With the increasing demand for urban sanitation, small road sweepers have been widely used in municipal cleaning due to their flexibility and efficiency. In existing technologies, the rotating shaft structure, as a key component of the road sweeper, directly affects the vehicle's performance and applicability. Existing rotating shaft structures include inner and outer double-layer rotating seats. The inner rotating seat connects to the rotating shaft via bearings, and the outer rotating seat connects to the inner rotating seat via bearings. While this design provides stable support and rotation, it also results in a complex structure and large size. For small road sweepers weighing 1-4 tons, this structure not only increases manufacturing costs but also limits the overall layout and flexibility of the vehicle, making existing rotating shaft structures difficult to meet the actual needs of small road sweepers.

[0049] Therefore, there is an urgent need for a small rotating shaft structure to overcome the shortcomings of existing technologies.

[0050] Please refer to Figures 1-8 This embodiment provides a road sweeper, which includes a vehicle body 3000, a water spray boom 2000, and a suction nozzle. The suction nozzle is mounted on the vehicle body 3000 and includes a rotating shaft structure 1000. The water spray boom 2000 and the rotating shaft structure 1000 are connected, and the rotating shaft structure 1000 is used to drive the water spray boom 2000 to swing out or retract relative to the vehicle body 3000. This can effectively improve the aforementioned technical problems.

[0051] Specifically, the vehicle body 3000 is equipped with a water tank, which is connected to the water spray boom 2000 to provide water to the water spray boom 2000. During the movement of the vehicle body 3000, the water spray boom 2000 sprays water outwards to soften dirt or wash the road surface, thus achieving the cleaning work. Water spray booms 2000 are installed on both sides of the vehicle body 3000, and the water spray booms 2000 are retracted, extended, and used for obstacle avoidance via a rotating shaft structure 1000.

[0052] Figure 1 A schematic diagram showing the water spray bar 2000 in the retracted state is displayed. Figure 2 A schematic diagram showing the water spray bar 2000 in its extended position is displayed. Figure 3 A schematic diagram of the water spray boom 2000 in obstacle avoidance mode is shown.

[0053] Please refer to Figures 4-8The suction nozzle includes a suction nozzle body and a rotating shaft structure 1000. The suction nozzle body and the rotating shaft structure 1000 are connected. The rotating shaft structure 1000 includes a rotating shaft 10, a first bearing 20, a second bearing 30, a first rotating seat 40, and a second rotating seat 70. The first bearing 20 is sleeved on the rotating shaft 10 and is clearance-fitted with the rotating shaft 10. The first bearing 20 is rotatably disposed relative to the rotating shaft 10. The first rotating seat 40 is sleeved on the first bearing 20 and is interference-fitted with the first bearing 20. The first rotating seat 40 is connected to the rotating shaft 10 through the first bearing 20. The second bearing 30 is sleeved on the rotating shaft 10 and is clearance-fitted with the rotating shaft 10. The second bearing 30 and the first bearing 20 are vertically distributed. The second rotating seat 70 is sleeved on the second bearing 30 and is connected to the rotating shaft 10 through the second bearing 30.

[0054] In this embodiment, the rotating shaft 10 includes a shaft body 11 and a mounting base 12. The shaft body 11 is welded to the mounting base 12, and the mounting base 12 is detachably mounted to the vehicle body 3000 by bolts. The mounting base 12 is detachably mounted to the suction nozzle of the vehicle body 3000 by bolts. Both the second bearing 30 and the first bearing 20 are sleeved on the shaft body 11. The first bearing 20 and the shaft body 11 are in a clearance fit, allowing the first bearing 20 to rotate relative to the shaft body 11. The second bearing 30 and the shaft body 11 are also in a clearance fit, allowing the second bearing 30 to rotate relative to the shaft body 11.

[0055] In this embodiment, there are two second bearings 30, which are spaced apart along the vertical direction of the shaft 11. Both second bearings 30 are located above the first bearing 20.

[0056] It should be noted that, compared with the existing technology that uses two bushings to form a double-layer structure, the first bearing 20 and the second bearing 30 of the rotating shaft structure 1000 provided in this embodiment form an upper and lower structure in the vertical direction. The first rotating seat 40 and the second rotating seat 70 also form an upper and lower structure through the first bearing 20 and the second bearing 30, which reduces the overall size of the rotating shaft structure 1000, reduces the weight, and facilitates the installation of the rotating shaft structure 1000 on a small road sweeper. The overall structure is simple and reduces production costs.

[0057] Furthermore, the rotating shaft structure 1000 also includes an end shaft baffle 100, which is installed at the end of the second bearing 30 away from the first bearing 20, and is used to limit the second bearing 30. One of the second bearings 30 is located in the middle of the shaft body 11 and above the first bearing 20, while the other second bearing 30 is located at the top of the shaft body 11 and is limited by the end shaft baffle 100. Compared to the prior art where one end shaft baffle 100 simultaneously limits two bearings, the end shaft baffle 100 of the rotating shaft structure 1000 in this embodiment only needs to limit one second bearing 30, reducing the assembly precision requirements and avoiding shaft breakage when the end shaft baffle 100 and the bearing are not properly assembled.

[0058] In this embodiment, the end shaft baffle 100 is fixed to the top of the shaft body 11 by bolts, thereby limiting the second bearing 30 located at the top of the shaft body 11.

[0059] Please refer to Figure 6 It should be noted that a groove 401 is provided on the surface of the rotating shaft 10 at a position corresponding to the first bearing 20. The groove 401 can increase the gap between the surface of the rotating shaft 10 and the first bearing 20, reduce the contact area, thereby reducing the friction between the rotating shaft 10 and the first bearing 20, thus ensuring the smooth rotation of the first bearing 20.

[0060] It should also be noted that the first rotating seat 40 includes a seat body 41 and a connecting plate 42. The connecting plate 42 has an arc-shaped plate structure, and the middle part of the side of the connecting plate 42 is fitted and welded together with the outer surface of the seat body 41. The two ends of the connecting plate 42 are respectively connected to the driving component 60 and the resetting component 80. The seat body 41 has a ring structure and is sleeved on the first bearing 20. The seat body 41 and the first bearing 20 are either interference-fitted or transition-fitted, meaning that there is no relative rotation between the seat body 41 and the first bearing 20 during rotation. The connecting seat can drive the first bearing 20 to rotate under the drive of the driving component 60.

[0061] Please continue to refer to this. Figure 4 and combined Figure 7The rotating shaft structure 1000 also includes a driving member 60 and a second rotating seat 70. The driving member 60 is connected to the first rotating seat 40 and is used to drive the first rotating seat 40 to move. One end of the second rotating seat 70 is interference-fitted or transition-fitted with the second bearing 30, and the other end of the second rotating seat 70 is connected to the spray rod 2000. The second rotating seat 70 includes a rod body 71 and a connecting ring 72. One end of the rod body 71 is welded to the outer surface of the connecting ring 72, and the other end of the rod body 71 is detachably connected to the spray rod 2000. The connecting ring 72 is sleeved on the rotating shaft 10, and the connecting ring 72 and the second bearing 30 are interference-fitted, meaning that there is no relative rotation between the connecting ring 72 and the second bearing 30 during rotation. The ends of the driving member 60 and the connecting plate 42 are connected by a pin. The driving member 60 performs linear reciprocating motion, thereby driving the first rotating seat 40 to rotate around the rotating shaft 10.

[0062] Furthermore, there are two second bearings 30. The inner wall of the connecting ring 72 is provided with an annular recess 721. The number of annular recesses 721 is matched with the number of second bearings 30. The two second bearings 30 are respectively disposed in the two annular recesses 721, and the second bearings 30 and the annular recesses 721 are interference-fitted. The bottom edge of one second bearing 30 abuts against the annular recess 721, and the top edge of the other second bearing 30 abuts against the annular recess 721.

[0063] In this embodiment, the drive component 60 is a cylinder. The direction of movement of the cylinder is consistent with the direction of travel of the vehicle body 3000. In other embodiments, the drive component 60 may also be an electric push rod or a hydraulic cylinder, etc., and no specific limitation is made here.

[0064] It should also be noted that the rotating shaft structure 1000 further includes a reset member 80, which is connected to both the second rotating seat 70 and the first rotating seat 40. The reset member 80 can be connected to the rod 71 or the water spray rod 2000.

[0065] In this embodiment, the reset member 80 is a spring. The two ends of the spring are respectively connected to the ends of the connecting plate 42 of the second rotating seat 70 and the first rotating seat 40.

[0066] Furthermore, the rotating shaft structure 1000 also includes a buffer block 90, which is detachably mounted on the seat 41 or the connecting ring 72. The second rotating seat 70 also includes a mating block 73, which is mounted on the outer surface of the connecting ring 72. The buffer block 90 is used to contact the mating block 73 when the reset member 80 drives the water spray rod 2000 to reset, so as to limit the movement; and / or, the buffer block 90 is used to contact the mating block 73 when the drive member 60 extends, thereby driving the second rotating seat 70 to rotate and retract the water spray rod 2000.

[0067] Please refer to Figure 1 and combined Figures 4-8 ,by Figure 1 The movement of the rotating shaft structure 1000 and the water spray bar 2000 on the right side is explained. The drive member 60 extends and drives the connecting plate 42 and the first bearing 20 of the first rotating seat 40 to rotate clockwise around the rotating shaft 10. During the rotation, the connecting plate 42 drives the buffer block 90 to rotate clockwise as well. The buffer block 90 gradually approaches the mating block 73 and makes physical contact with the mating block 73. After contact, the buffer block 90 can push the mating block 73 to rotate clockwise as well. The mating block 73 can drive the second rotating seat 70 and the second bearing 30 to rotate clockwise around the rotating shaft 10, thereby driving the water spray bar 2000 to rotate clockwise, and finally reaching the retracted state.

[0068] Please refer to Figure 2 and combined Figures 4-8 ,by Figure 2 The movement of the rotating shaft structure 1000 and the water spray bar 2000 on the right side is explained. The drive component 60 retracts, causing the connecting plate 42 of the first rotating seat 40 and the first bearing 20 to rotate counterclockwise around the rotating shaft 10. During the rotation, the connecting plate 42 causes the reset component 80 to rotate counterclockwise as well. While the reset component 80 rotates counterclockwise, it can also cause the second rotating seat 70 to rotate counterclockwise as well, thereby causing the water spray bar 2000 to rotate counterclockwise, and finally reach the swing-out state.

[0069] Please refer to Figure 3 and combined Figures 4-8 ,by Figure 3 The movement of the rotating shaft structure 1000 and the water spray bar 2000 on the right side of the screen will be explained. Figure 3 The dashed line illustrates that when the rotating shaft structure 1000 and the water spray bar 2000 encounter an obstacle, the water spray bar 2000 moves towards the rear of the vehicle body 3000 under the external force of the obstacle. The second rotating seat 70 rotates clockwise with the water spray bar 2000, the drive component 60 stops working, the connecting plate 42 of the first rotating seat 40 is stationary, and one end of the reset component 80 is stretched as the second rotating seat 70 rotates clockwise, thereby storing energy. When the obstacle leaves the water spray bar 2000, the water spray bar 2000 loses the external force for movement, the second rotating seat 70 no longer continues to rotate clockwise, and the reset component 80 retracts under its own elastic force, thereby driving the second rotating seat 70 and the water spray bar 2000 to rotate counterclockwise, so as to reset the water spray bar 2000. In this process, the second rotating seat 70 will drive the mating block 73 to rotate counterclockwise as it rotates counterclockwise. The mating block 73 gradually approaches the buffer block 90 until it comes into contact with the buffer block 90, so as to achieve obstacle avoidance and buffering.

[0070] Furthermore, the rotating shaft structure 1000 also includes an oil cup. The interior of the rotating shaft 10 is provided with an oil passage hole 402, which is connected to the first bearing 20. The oil cup is located on the side wall of the shaft body 11 of the rotating shaft 10 and is connected to the oil passage hole 402. Lubricating oil can be added into the oil passage hole 402 through the oil cup and then reach the interior of the first bearing 20 for lubrication.

[0071] In addition, the rotating shaft structure 1000 also includes a first sealing ring 50 and a second sealing ring 120. The first sealing ring 50 is located between the rotating shaft 10 and the seat 41, and below the first bearing 20. The first sealing ring 50 is sleeved on the rotating shaft 10 and located at the bottom of the first bearing 20. The bottom of the seat 41 extends downward, so that the seat 41 can cover the gap between the first bearing 20 and the first sealing ring 50, as well as the gap between the first sealing ring 50 and 41, effectively preventing the entry of fine mud and sand during vehicle operation or washing, and avoiding jamming of the first bearing 20. The second sealing ring 120 is located between the first bearing 20 and the connecting ring 72 of the second rotating seat 70, and above the seat 41. The second sealing ring 120 is located on the top of the seat 41 and sleeved on the outer surface of the first bearing 20. The bottom of the connecting ring 72 extends downward to cover the gap between the seat 41 and the second sealing ring 120, as well as the gap between the first bearing 20 and the second sealing ring 120.

[0072] Furthermore, the rotating shaft structure 1000 also includes an end cap 110, which is located above the connecting ring 72. The end cap 110 is bolted to the top of the connecting ring 72 of the second rotating seat 70 to enclose and protect the space inside the connecting ring 72.

[0073] Furthermore, the coefficient of friction of the first bearing 20 is less than or equal to the coefficient of friction of the second bearing 30. The first bearing 20 is preferably a rolling bearing. The low coefficient of friction of the first bearing 20 can be used for collision avoidance; the lower the coefficient of friction, the less resistance the spray bar encounters when encountering obstacles. The second bearing 30 has relatively lower requirements for friction; it only needs that the cylinder thrust is greater than the friction force.

[0074] In summary, this utility model embodiment provides a suction nozzle and a road sweeper. The suction nozzle includes a suction nozzle body and a rotating shaft structure 1000. The rotating shaft structure 1000 is connected to the suction nozzle body. The rotating shaft structure 1000 includes a rotating shaft 10, a first bearing 20, a first rotating seat 40, a second bearing 30, and a second rotating seat 70. The first bearing 20 is sleeved on the rotating shaft 10, and the first rotating seat 40 is sleeved on the first bearing 20. The first rotating seat 40 is connected to the rotating shaft 10 through the first bearing 20. The second bearing 30 is sleeved on the rotating shaft 10, and the second bearing 30 and the first bearing 20 form an upper and lower structure. The second rotating seat 70 is sleeved on the second bearing 30 and is connected to the rotating shaft 10 through the second bearing 30. In use, the first bearing 20 and the second bearing 30 are both sleeved on the rotating shaft 10 to form an upper and lower structure. The first rotating seat 40 is sleeved on the first bearing 20 and connected to the rotating shaft 10 through the first bearing 20. The second rotating seat 70 is sleeved on the second bearing 30 and connected to the rotating shaft 10 through the second bearing 30. The first rotating seat 40 and the second rotating seat 70 also form an upper and lower structure through the first bearing 20 and the second bearing 30. This reduces the overall size of the nozzle, reduces the number of bearings, simplifies the overall structure, achieves lightweight design, and reduces production costs.

[0075] The sweeper truck includes a body 3000, a water spray boom 2000, and a suction nozzle. The suction nozzle is mounted on the body 3000. The water spray boom 2000 is connected to a rotating shaft structure 1000, which drives the water spray boom 2000 to swing out or retract relative to the body 3000. The water spray boom 2000's swinging out or retraction on the body 3000 is achieved through the rotating shaft structure 1000. A first bearing 20 and a second bearing 30 are both fitted onto the rotating shaft 10, forming an upper and lower structure. A first rotating seat 40 is fitted onto the first bearing 20 and connected to the rotating shaft 10 via the first bearing 20. A second rotating seat 70 is fitted onto the second bearing 30 and connected to the rotating shaft 10 via the second bearing 30. The first rotating seat 40 and the second rotating seat 70 also form an upper and lower structure through the first bearing 20 and the second bearing 30. This design reduces the overall size of the rotating shaft structure 1000, reduces the number of bearings, simplifies the overall structure, achieves lightweight design, and reduces production costs.

[0076] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A suction nozzle for a road sweeper, characterized in that include: The suction nozzle itself; A rotating shaft structure (1000) is connected to the nozzle body, the rotating shaft structure (1000) comprising: Rotation axis (10); A first bearing (20) is sleeved on the rotating shaft (10); The first rotating seat (40) includes a seat body (41) and a connecting plate (42). The seat body (41) is sleeved on the first bearing (20), and the connecting plate (42) is connected to the outer surface of the seat body (41). A driving component (60) is connected to the connecting plate (42) and is used to drive the base (41) to rotate around the rotation axis (10) via the connecting plate (42); The second bearing (30) is sleeved on the rotating shaft (10), and the second bearing (30) and the first bearing (20) are arranged vertically. The second rotating seat (70) includes a connecting ring (72) and a rod (71). The connecting ring (72) is sleeved on the second bearing (30). One end of the rod (71) is connected to the outer surface of the body of the second rotating seat (70), and the other end of the rod (71) is used to connect with the water spray rod (2000). A reset member (80) is connected to the connecting plate (42), and the reset member (80) is used to connect to the rod body (71) or the water spray rod (2000); A buffer block (90) is mounted on the base (41) or the connecting plate (42). A mating block (73) is mounted on the outer surface of the connecting ring (72). The buffer block (90) is used to contact the mating block (73) when the reset member (80) drives the water spray bar (2000) to reset, so as to limit the movement; and / or, The buffer block (90) is used to contact the mating block (73) when the drive member (60) is extended, thereby driving the second rotating seat (70) to rotate to retract the water spray bar (2000).

2. The mouthpiece of claim 1, wherein The seat (41) is either interference-fitted or transition-fitted with the first bearing (20).

3. The mouthpiece of claim 1, wherein The surface of the rotating shaft (10) is provided with a groove (401) at a position corresponding to the first bearing (20). The groove (401) is used to reduce the friction between the rotating shaft (10) and the first bearing (20).

4. The mouthpiece of claim 1, wherein The connecting ring (72) is either interference-fitted or transition-fitted with the second bearing (30).

5. The mouthpiece of claim 4, wherein The rotating shaft structure (1000) also includes an end cap (110), which is located above the connecting ring (72) and is detachably connected to the connecting ring (72).

6. The suction nozzle according to claim 4, characterized in that, The number of the second bearings (30) is two. The inner wall of the connecting ring (72) is provided with an annular recess (721). The number of the annular recess (721) is adapted to the number of the second bearings (30). The two second bearings (30) are respectively disposed in the two annular recesses (721) and abut against the annular recesses (721).

7. The suction nozzle according to claim 1, characterized in that, The rotating shaft structure (1000) further includes a first sealing ring (50), which is disposed between the rotating shaft (10) and the seat (41) and is located below the first bearing (20).

8. The suction nozzle according to claim 1, characterized in that, The rotating shaft structure (1000) further includes a second sealing ring (120), which is disposed between the first bearing (20) and the connecting ring (72) of the second rotating seat (70), and is located above the seat body (41).

9. The suction nozzle according to claim 1, characterized in that, The friction coefficient of the first bearing (20) is less than or equal to the friction coefficient of the second bearing (30).

10. A road sweeper, characterized in that, The device includes a vehicle body (3000), a water spray bar (2000), and a suction nozzle as described in any one of claims 1-9. The suction nozzle is mounted on the vehicle body (3000), and the water spray bar (2000) is connected to the rotating shaft structure (1000). The rotating shaft structure (1000) is used to drive the water spray bar (2000) to swing out or retract relative to the vehicle body (3000).

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