A suction wheel assembly, a suction system and a sweeper

Abstract

This invention relates to the field of sweeper technology, specifically to a suction wheel assembly, a suction system, and a sweeper. A suction wheel assembly may include a bracket, an axle, a first hub, a second hub, a sealing and lubrication assembly, and a tire. One end of the axle is detachably connected to the bracket. The first hub includes a support sleeve, a first spoke, and a first rim. The support sleeve is coaxial with and rotatably connected to the axle. The support sleeve and the first spoke are integrally formed. The first spoke is located on the outer circumference of the support sleeve. The second hub includes a second spoke and a second rim. The sealing and lubrication assembly is detachably connected to the axle and the support sleeve. The tire is fitted onto the outer circumference of the first and second rims. A suction system may include a suction body and a hydraulic lifting assembly. A sweeper may include a vehicle body and a suction system. This solves the problem of cumbersome steps when changing tires on suction wheels.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cleaning vehicles, in particular to a suction nozzle wheel assembly, a suction nozzle system and a cleaning vehicle. BACKGROUND

[0002] The cleaning vehicle has developed for many years, and the product has developed from a single pure sweeping type to various types. The cleaning vehicle, as one of environmental protection equipment, can be widely used in the cleaning of trunk roads, urban residential areas, parks and other roads. The cleaning vehicle is a new type of high-efficiency cleaning equipment which integrates road cleaning, garbage recycling and transportation. The cleaning vehicle is usually composed of a vehicle body, a chassis, a cleaning device and the like. The cleaning device generally generates negative pressure by a suction nozzle to suck the garbage swept by a sweeper into the middle of the vehicle and then transport the garbage into a garbage box. When the suction nozzle works, it not only collects garbage but also purifies the air medium on the road, which helps to maintain environmental sanitation and road aesthetics. The suction nozzle wheel, as a part of the suction nozzle system, is a special mechanical component which can be composed of a tire, a hub, a bearing and a bracket. The suction nozzle wheel can bear the weight of the suction nozzle body and keep a stable gap between the suction nozzle body and the ground.

[0003] With the factors such as vehicle operation speed and working environment, the suction nozzle is generally equipped with multiple suction cavities, which results in that the volume and weight of the suction nozzle are too large, greatly increasing the load of the suction nozzle wheel and having a high requirement on the quality and service life of the suction nozzle wheel. The degree of wear of the suction nozzle wheel is relatively large, so the tire of the suction nozzle wheel needs to be replaced regularly. When replacing the tire of the suction nozzle wheel, both ends of the hub need to be disassembled, and then the tire is replaced. In this way, the tire replacement time is too long, the workload is large, and the steps are relatively complicated. SUMMARY

[0004] To solve the problem that the steps of replacing the tire of the suction nozzle wheel are relatively complicated, the present application provides a suction nozzle wheel assembly, a suction nozzle system and a cleaning vehicle.

[0005] In a first aspect, the present application provides a suction nozzle wheel assembly, comprising:

[0006] a bracket;

[0007] a wheel shaft, one end of the wheel shaft being detachably connected with the bracket;

[0008] a first hub, the first hub comprising a supporting sleeve, a first spoke and a first rim; the supporting sleeve is coaxial with the wheel shaft and is rotationally connected with the wheel shaft; the supporting sleeve and the first spoke are integrally formed; the first spoke is located on the outer circumferential side of the supporting sleeve; the first rim is integrally formed with the first spoke; the first rim is located on the outer circumferential side of the first spoke;

[0009] A second hub, the second hub comprising a second spoke and a second rim; the second rim is integrally formed with the second spoke; the second rim is located at the outer circumferential side of the second spoke; the second spoke is detachably connected with the first spoke; defining the abutting surface of the second spoke and the first spoke as a reference surface, the first rim and the second rim are symmetrically arranged about the reference surface; the support is located at the side of the first hub away from the second hub;

[0010] A sealing and lubricating assembly, the sealing and lubricating assembly is detachably connected with the wheel shaft; the sealing and lubricating assembly is detachably connected with the support sleeve;

[0011] A tire, the tire is sleeved on the outer circumferential side of the first rim and the second rim.

[0012] In some embodiments, the sealing and lubricating assembly, the wheel shaft and the support sleeve cooperate to form an oil lubrication sealing cavity.

[0013] In some embodiments, the sealing and lubricating assembly comprises:

[0014] An end cover, the end cover is detachably connected with the support sleeve; the end cover is located at the end of the support sleeve away from the support;

[0015] An oil seal unit, the oil seal unit is detachably connected with the support sleeve; the oil seal unit is detachably connected with the wheel shaft; the end cover, the oil seal unit, the support sleeve and the wheel shaft cooperate to form the oil lubrication sealing cavity;

[0016] A plurality of connecting bearings, the connecting bearings are detachably connected with the support sleeve; the connecting bearings are detachably connected with the wheel shaft; the connecting bearings are located in the oil lubrication sealing cavity.

[0017] In some embodiments, the sealing and lubricating assembly further comprises an axial locking unit; the axial locking unit comprises a locking retainer, a locking washer and a locking nut; the locking retainer is sleeved on the wheel shaft; the connecting bearing farthest from the support abuts against the side of the locking retainer facing the support; the locking washer is sleeved on the wheel shaft; the locking washer abuts between the locking retainer and the locking nut; the locking nut is threadedly connected with the wheel shaft.

[0018] In some embodiments, the locking washer comprises a washer body and a plurality of clamping plates; the washer body is sleeved on the wheel shaft; the washer body abuts between the locking retainer and the locking nut; a plurality of the clamping plates are integrally formed with the washer body, and a plurality of the clamping plates are uniformly distributed around the circumference of the washer body; the outer circumferential side of the locking nut is provided with a plurality of clamping grooves.

[0019] In some embodiments, the nozzle wheel assembly further comprises a fastening assembly; the fastening assembly comprises a plurality of fastening bolts, a plurality of fastening nuts, and a pressing unit; the fastening bolts and the fastening nuts are in one-to-one correspondence; the fastening bolts are arranged in the first hub and the second hub; the fastening nuts are threadedly connected with the corresponding fastening bolts; the fastening nuts are located on the side of the first hub away from the second hub; the pressing unit is detachably connected between the support and the first hub; the pressing unit exerts an elastic force on the support and the fastening nuts, which is parallel to the wheel shaft.

[0020] In some embodiments, the pressing unit comprises an elastic part, a positioning ring, and a rotating ring; the positioning ring is coaxial with the wheel shaft; the positioning ring is coaxial with the rotating ring and is rotationally connected with the rotating ring; the wheel shaft is arranged in the positioning ring; the elastic part is detachably connected between the support and the positioning ring; the rotating ring is fixedly connected with the fastening nuts.

[0021] In some embodiments, the elastic part comprises a tension spring and a compression spring; in the state that the nozzle wheel assembly is assembled on the sweeper, the axis of the tension spring is located above the axis of the wheel shaft; the compression spring is located below the axis of the wheel shaft.

[0022] In a second aspect, the present application provides a nozzle system, comprising:

[0023] a plurality of nozzle wheel assemblies as described in any one of the first aspect;

[0024] a nozzle body; the plurality of nozzle wheel assemblies are distributed around the nozzle body; the support of the nozzle wheel assembly is detachably connected with the nozzle body;

[0025] a hydraulic lifting assembly; the hydraulic lifting assembly comprises a hydraulic driving unit and an oil-gas spring; the hydraulic driving unit is detachably connected with the nozzle body and the nozzle wheel assembly respectively; the hydraulic lifting assembly drives the nozzle body to move relative to the nozzle wheel assembly; the moving direction of the nozzle body driven by the hydraulic lifting assembly is perpendicular to the axial direction of the wheel shaft of the nozzle wheel assembly; the oil-gas spring is detachably connected with the hydraulic lifting assembly.

[0026] In a third aspect, the present application provides a sweeper, comprising:

[0027] a vehicle body;

[0028] a nozzle system as described in the second aspect; the nozzle system is detachably connected with the vehicle body; the first hub in the nozzle system is located on the side of the wheel shaft close to the center of the vehicle body.

[0029] The present application has the following advantages in solving the problem of complicated steps of the nozzle wheel when changing the tire.

[0030] By dividing the wheel hub into a first wheel hub and a second wheel hub with different sizes, and the second wheel hub is smaller and has no direct connection with the wheel shaft, only the second wheel hub needs to be disassembled when the tire needs to be replaced, without the need to remove the connection between the first wheel hub and the support, and without the need to remove the sealing structure between the first wheel hub and the wheel shaft, thereby reducing the time and workload of replacing the tire. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 A side view of a nozzle wheel assembly of an embodiment is shown;

[0032] Figure 2 A side view of a nozzle wheel assembly of an embodiment is shown; Figure 1 A cross-sectional view of the nozzle wheel assembly along the A-A direction is shown;

[0033] Figure 3 An exploded view of a locking washer and a locking nut is shown;

[0034] Figure 4 A side view of a nozzle wheel assembly of another embodiment is shown;

[0035] Figure 5 A side view of a nozzle wheel assembly of another embodiment is shown; Figure 4 A cross-sectional view of the nozzle wheel assembly along the B-B direction is shown;

[0036] Figure 6 A schematic view of a resisting unit in another embodiment is shown;

[0037] Figure 7 A schematic view of a nozzle system of another embodiment is shown;

[0038] Figure 8 A schematic view of a sweeper of an embodiment is shown.

[0039] Reference: support 10; axle 20; positioning shaft shoulder 21; first hub 30; support sleeve 31; first spoke 32; first rim 33; second hub 40; second spoke 41; second rim 42; sealing and lubricating assembly 50; end cover 51; oil seal unit 52; thrust baffle 521; skeleton oil seal 522; elastic sealing ring 523; connecting bearing 53; inner ring 531; outer ring 532; rolling element 533; axial locking unit 54; locking baffle 541; locking washer 542; washer body 5421; clamping plate 5422; locking nut 543; clamping groove 5431; oil plug 55; visual oil sight glass 56; tire 60; fastening assembly 70; fastening bolt 71; fastening nut 72; abutting unit 73; elastic part 731; tension spring 7311; compression spring 7312; positioning ring 732; rotating shaft 733; suction nozzle body 80; hydraulic lifting assembly 90; hydraulic drive unit 91; oil gas spring 92; vehicle body 100; suction nozzle system 110. DETAILED DESCRIPTION

[0040] The present disclosure will now be discussed with reference to several example embodiments. It should be appreciated that these embodiments are discussed only to better illustrate the present disclosure and are not intended to limit the scope of the present disclosure in any way.

[0041] As used herein, the terms "comprises," "comprising," "includes," "including," "has," "having," "contains," "containing," or any other variation thereof, are intended to be inclusive or open-ended and do not exclude additional terms, elements, or steps. The terms "based on" and "based upon" are to be interpreted as "based at least in part on." The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment." The term "another embodiment" is to be interpreted as "at least one other embodiment." The terms "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "vertical," "horizontal," "lateral," "longitudinal," and the like, merely describe points of reference and do not necessarily limit the position, location, and / or orientation of an element unless otherwise stated. These terms are used primarily for ease of description in accordance with the drawings and the overall scope of the application is not intended to be limited by the terms. In addition, the terms "upper," "lower," "front," "back," "top," "bottom," "inner," "outer," "vertical," "horizontal," "lateral," "longitudinal," and the like, can have other meanings in certain contexts. For example, the term "upper" can also mean "closer to the top" in some contexts. Those of ordinary skill in the art will understand the specific meanings of these terms in the context of the present application. Furthermore, the terms "mount," "position," "provided with," "connected," "linked," and the like, should be interpreted broadly. For example, they can mean fixedly connected, removably connected, or integrally formed; they can mean mechanically connected, or electrically connected; they can mean directly connected, or indirectly connected via intervening medium; and they can mean internal communication between two elements, devices, or components. Those of ordinary skill in the art will understand the specific meanings of these terms in the context of the present application. Furthermore, the terms "first," "second," and the like, are used primarily to distinguish different elements, devices, or components from one another (the specific class and construction of which can or can not be the same). Unless otherwise stated, the term "plurality" means two or more.

[0042] The sweeper is a mechanical equipment specially used for road cleaning, which can be composed of a vehicle body, a chassis, a sweeping device and the like. The sweeping device can include a suction nozzle system. The suction nozzle system can include a suction nozzle body and a plurality of suction nozzle wheels distributed around the suction nozzle body. The suction nozzle wheel belongs to a part of the suction nozzle system, can bear the weight of the suction nozzle body, keep a certain gap between the suction nozzle body and the ground, and enable the suction nozzle body to follow the sweeper to travel by relying on the suction nozzle wheel. The suction nozzle wheel can be composed of a support, a hub, a tire, an axle and a sealing component. The support is fixed to both ends of the axle, and the hub is evenly divided into two halves along the vertical axle axis direction, and the rims of the two halves of the hub jointly support and axially limit the tire. When replacing the tire, the two halves of the hub need to be separated to disassemble the tire for replacement. The fixation of the two halves of the hub to the axle depends on the fixation of the support to the axle, and the sealing assembly is also fixed to the axle by the support. Therefore, when replacing the tire, in order to separate the two halves of the hub, the suction nozzle wheel needs to be disassembled from the support as a whole, that is, the two ends of the axle are respectively disassembled from the support, so that the suction nozzle wheel can be taken out from the support as a whole. Such a replacement mode needs to disassemble the sealing assembly connected between the hub and the axle when disassembling the hub, so that the disassembly and assembly are extremely inconvenient, and the sealing effect of the sealing structure is easily damaged.

[0043] Therefore, in order to solve the problem of inconvenient tire disassembly in the related art, as shown in Figure 1

[0044] The embodiment provides a suction nozzle wheel assembly, which can include a support 10, an axle 20, a first hub 30, a second hub 40, a sealing and lubricating assembly 50 and a tire 60.

[0045] As shown in Figure 2 The support 10 is an important component of the suction nozzle wheel. The support 10 can keep the position and angle of the suction nozzle wheel stable. Meanwhile, the support 10 can also protect the suction nozzle wheel from external impact and damage to a certain extent, and prolong the service life of the suction nozzle wheel.

[0046] The axle 20 can play a key role in the suction nozzle wheel device, and the axle 20 needs to be arranged in parallel with the horizontal plane. The suction nozzle wheel can rotate around the axle 20, and the axle 20 can make the position and angle of the suction nozzle wheel more stable. One end of the axle 20 can be detachably connected with the support 10.

[0047] ​The first wheel hub 30 may include a support sleeve 31, a first spoke 32, and a first rim 33. The support sleeve 31 may be coaxially and rotatably connected to the axle 20. The support sleeve 31 may be integrally formed with the first spoke 32. The first spoke 32 may be located on the outer circumference of the support sleeve 31. The first rim 33 may be integrally formed with the first spoke 32. The first rim 33 may be located on the outer circumference of the first spoke 32. The spokes can support the rim, thereby ensuring that the tire 60 can be securely mounted on the wheel hub. The first wheel hub 30 can absorb the impact force from the road surface, reduce the direct impact on the tire 60, thereby protecting the tire 60 from damage and extending its service life.

[0048] The second hub 40 is detachably connected to the first hub 30. The second hub 40 may include a second spoke 41 and a second rim 42. The second rim 42 may be integrally formed with the second spoke 41. The second rim 42 may be located on the outer circumference of the second spoke 41. The second spoke 41 may be detachably connected to the first spoke 32. The contact surface between the second spoke 41 and the first spoke 32 may be defined as a reference surface, which may be perpendicular to the axis of the axle 20. The first rim 33 may be symmetrically arranged with respect to the second rim 42 about the reference surface. The bracket 10 is located on the side of the first hub 30 away from the second hub 40. That is, in this embodiment, the bracket 10 is only connected to one end of the axle 20, which differs from the two connection points in related technologies.

[0049] The sealing and lubrication assembly 50 plays a crucial barrier role in the nozzle wheel. It is detachably connected to the axle 20 and the support sleeve 31. The support sleeve 31 in the first hub 30 can be fixed to the axle 20 using the cooperation of the sealing and lubrication assembly 50 and the bracket 10. Since the bracket 10 does not obstruct the removal of the second hub 40, the second hub 40 can be directly removed from the first hub 30, thus the sealing and lubrication assembly 50 does not need to be removed when changing the tire 60. This prevents leakage of the lubricating medium and prevents external impurities such as dust and moisture from entering the sealing and lubrication assembly 50. In other words, it protects the interior of the sealing and lubrication assembly 50 from external environmental damage and prevents external contaminants, ensuring the normal operation of the nozzle wheel and extending its service life. This effectively ensures the sealing performance of the sealing and lubrication assembly 50.

[0050] Tire 60 is fitted onto the outer circumference of the first rim 33 and the second rim 42. Tire 60 is fixed to the wheel hub by the support and axial restraint of the first rim 33 and the second rim 42. When changing tire 60, it is not necessary to disassemble the connection between bracket 10 and axle 20, nor is it necessary to remove the sealing and lubrication assembly 50. Since the second wheel hub 40 is not directly connected to the axle 20, it is only necessary to remove the second wheel hub 40 from the first wheel hub 30, thus achieving a quick tire 60 replacement.

[0051] In this embodiment, as Figure 2 As shown, the sealing and lubrication assembly 50, the axle 20, and the support sleeve 31 cooperate to form an oil-lubricated sealing cavity. Since the oil-lubricated sealing structure does not need to be removed when changing the tire 60, the sealing effect is not easily affected, and a good seal can be maintained. Therefore, lubricating oil can be used as the lubricating medium.

[0052] If the sealing structure needs to be removed when changing tires (60mm), affecting the sealing effect, the lubricating medium is usually a grease with strong adhesion but poor flowability to minimize leakage. However, once moisture and dust impurities mix into the grease, these impurities are difficult to separate, affecting the lubrication effect and causing damage to the shaft. Furthermore, grease is semi-solid, making refilling, changing, and cleaning difficult. Therefore, oil lubrication is used for the sealing cavity. Oil lubrication offers better lubrication than grease. Compared to grease, lubricating oil is liquid with excellent flowability, allowing it to quickly penetrate the friction surfaces, forming a uniform oil film and reducing friction and wear. It also has strong heat dissipation properties, and impurities are easily separated, achieving a long-term maintenance-free effect.

[0053] In this embodiment, as Figure 2 As shown, the sealing and lubrication assembly 50 may include an end cap 51, an oil seal unit 52, and several connecting bearings 53.

[0054] End cap 51 prevents external dust and impurities from entering the sealing and lubrication assembly 50. End cap 51 is detachably connected to support sleeve 31. End cap 51 is located at the end of support sleeve 31 away from bracket 10. A removable oil plug 55 is connected to end cap 51, with the orientation of oil plug 55 offset from the axial direction of axle 20. A removable sight glass 56 is also connected to end cap 51, with the orientation of sight glass 56 parallel to the axial direction of axle 20. The condition of the components and lubricating oil inside the oil lubrication sealing cavity can be observed through sight glass 56. The required lubricating oil can be added by removing oil plug 55. This achieves the effect of maintaining the sealing and lubrication assembly 50 without disassembling it, thus effectively preventing damage and contamination of the internal components and lubricating oil of the sealing and lubrication assembly 50.

[0055] The oil seal unit 52 may include a thrust ring 521, a skeleton oil seal 522, and an elastic sealing ring 523. The oil seal unit 52 is detachably connected to the support sleeve 31 and the wheel axle 20. The wheel axle 20 has a locating shoulder 21, the thrust ring 521 abuts against the locating shoulder 21, and the connecting bearing 53 closest to the bracket 10 abuts against the side of the thrust ring 521 opposite to the locating shoulder 21. The skeleton oil seal 522 is annular and abuts between the thrust ring 521 and the support sleeve 31. The elastic sealing ring 523 is coaxial with the skeleton oil seal 522 and is detachably connected to it. The elastic sealing ring 523 exerts an elastic clamping force on the skeleton oil seal 522 to drive the inner circumferential wall of the skeleton oil seal 522 to tend to shrink. Because the oil-lubricated sealed cavity can isolate the lubricated parts in the transmission components from the outside, it can prevent lubricating oil leakage and contamination, thereby protecting the operating efficiency and life of the equipment.

[0056] The connecting bearing 53 in the sealing and lubrication assembly 50 is detachably connected to the support sleeve 31 and the axle 20. The connecting bearing 53 is located within the oil-lubricated sealing cavity. The connecting bearing 53 may include an inner ring 531, an outer ring 532, and multiple rolling elements 533. The outer ring 532 is located on the outer circumference of the inner ring 531, and the multiple rolling elements 533 abut against the inner ring 531 and the outer ring 532. The inner ring 531 of the connecting bearing 53 closest to the bracket 10 abuts against the thrust retainer ring 521. There is a gap between the outer ring 532 of the connecting bearing 53 closest to the bracket 10 and the thrust retainer ring 521. The connecting bearing 53 is a tapered roller bearing. This bearing can automatically adjust for axial misalignment, ensuring even force distribution on the connecting bearing 53, thereby reducing wear and extending its service life. Avoiding frequent replacement of the connecting bearing 53 reduces maintenance frequency.

[0057] In this embodiment, as Figure 2 As shown, the sealing and lubrication assembly 50 may further include an axial locking unit 54. The axial locking unit 54 may include a locking retaining ring 541, a locking washer 542, and a locking nut 543. The locking retaining ring 541 may be fitted onto the axle 20. The connecting bearing 53 furthest from the bracket 10 abuts against the locking retaining ring 541 on the side facing the bracket 10. The locking retaining ring 541 has high strength and stability. The locking retaining ring 541 ensures that the fit clearance between the connecting bearing 53 and the locking washer 542 is appropriate, avoiding excessive tightness or looseness. The locking washer 542 is fitted onto the axle 20. The locking washer 542 abuts between the locking retaining ring 541 and the locking nut 543, which is threadedly connected to the axle 20. The locking unit generates a locking force to fix the locking unit to the axle 20. During the locking process, the locking unit can overcome external forces such as friction and inertia between components to ensure the stability of the axle 20.

[0058] In this embodiment, as Figure 2 , Figure 3 As shown, the locking washer 542 may include a washer body 5421 and multiple snap-fit ​​plates 5422. The washer body 5421 can be sleeved on the axle 20 and can abut against the locking retaining ring 541 and the locking nut 543. The multiple snap-fit ​​plates 5422 are integrally formed with the washer body 5421 and are evenly distributed around the circumference of the washer body 5421. The outer circumference of the locking nut 543 may have several slots 5431. The multiple snap-fit ​​plates 5422 of the locking washer 542 can be snapped into the slots 5431 of the locking nut 543. The number of slots 5431 and snap-fit ​​plates 5422 does not need to correspond one-to-one; only a minimum of one snap-fit ​​plate 5422 needs to be snapped into the locking nut 543. The shapes of the snap-fit ​​plates 5422 and the slots 5431 are matched. By snapping multiple snap-fit ​​plates 5422 into the slots 5431 of the locking nut 543, additional locking force can be generated when the locking nut 543 is tightened. Thus, through the structure of the locking nut 543 and the snap-fit ​​plates 5422, the locking nut 543 can be more securely connected to the axle 20.

[0059] In another embodiment, such as Figure 4 , Figure 5 As shown, the nozzle wheel assembly may also include a fastening assembly 70. The fastening assembly 70 may include multiple fastening bolts 71, multiple fastening nuts 72, and a clamping unit 73. The fastening bolts 71 and fastening nuts 72 are one-to-one. The fastening bolts 71 may pass through the first hub 30 and the second hub 40. The fastening nuts 72 are threadedly connected to their corresponding fastening bolts 71. The fastening nuts 72 are located on the side of the first hub 30 facing away from the second hub 40. The clamping unit 73 is detachably connected between the bracket 10 and the first hub 30. The clamping unit 73 applies an elastic force parallel to the wheel axle 20 to the bracket 10 and the fastening nuts 72. The fastening nuts 72 are less prone to rotation when subjected to loads caused by bumps, thereby improving the connection stability between the first hub 30 and the second hub 40. The clamping unit 73 can axially buffer the bumps experienced by the nozzle wheel during travel, thus compensating for the insufficient support effect caused by the single-point fixation of the bracket 10.

[0060] In this embodiment, as Figure 5 , Figure 6As shown, the clamping unit 73 may include an elastic part 731, a positioning ring 732, and a rotating ring 733. The positioning ring 732 is coaxial with the axle 20, and the positioning ring 732 and the bracket 10 do not rotate when the vehicle is in motion. The positioning ring 732 and the rotating ring 733 are coaxial and rotatably connected. The axle 20 can pass through the positioning ring 732. The elastic part 731 is detachably connected between the bracket 10 and the positioning ring 732. The rotating ring 733 is fixedly connected to the fastening nut 72. The elastic part 731 is stably fixed on the positioning ring 732, and the rotating ring 733 moves with the axle 20. This allows the suction wheel to be cushioned by the impact of road surface and other environmental factors during travel. This further compensates for the insufficient support effect caused by the single-point fixation of the bracket 10.

[0061] In this embodiment, as Figure 5 , Figure 6 As shown, the elastic part 731 may include a tension spring 7311 and a compression spring 7312. When the suction nozzle assembly is mounted on the sweeper, the axis of the tension spring 7311 can be located above the axis of the axle 20. There can be one tension spring 7311, and its elastic force after tension can prevent the support 10 from tilting. The compression spring 7312 can be located below the axis of the axle 20, and there can be three compression springs 7312. Utilizing the high elasticity of the compression spring 7312, it can buffer and absorb vibrations. When the suction nozzle 80 sucks up debris from the ground, it generates negative pressure, leading to excessive weight and a tendency for the support 10 to tip inward. The cooperation of the tension spring 7311 and the compression spring 7312 reduces the possibility of the support 10 tilting downwards near the suction nozzle 80, thereby improving stability. During use, the nozzle body 80 is relatively heavy. The combination of tension spring 7311 and compression spring 7312 can reduce the possibility of the end of the bracket 10 near the nozzle body 80 tilting downwards.

[0062] This embodiment discloses a suction nozzle system 110, such as Figure 7 As shown, the suction system 110 may include: multiple suction wheel assemblies, a suction body 80, and a hydraulic lifting assembly 90.

[0063] The nozzle body 80 uses negative pressure to suck up trash and dust from the ground. Multiple nozzle roller assemblies can be distributed around the nozzle body 80. The bracket 10 of the nozzle roller assembly is detachably connected to the nozzle body 80. The nozzle body 80 can adapt to different road surface environments to achieve road cleaning.

[0064] The hydraulic lifting assembly 90 includes a hydraulic drive unit 91 and a pneumatic spring 92. The hydraulic drive unit 91 is detachably connected to both the suction nozzle body 80 and the suction nozzle wheel assembly. The hydraulic lifting assembly 90 drives the suction nozzle body 80 to move relative to the suction nozzle wheel assembly, with the direction of movement perpendicular to the axial direction of the wheel axle 20 of the suction nozzle wheel assembly. The pneumatic spring 92 is detachably connected to the hydraulic lifting assembly 90 and can be located inside the wheel axle 20. The sweeper's hydraulic lifting assembly 90 utilizes the principle of hydraulic transmission to achieve the lifting and lowering of various components of the sweeper. The hydraulic lifting assembly 90 has advantages such as high load-bearing capacity, good stability, and precise control. In the sweeper, the hydraulic lifting system can be used to adjust the suction nozzle body 80 to adapt to different garbage collection needs. The hydraulic lifting assembly 90 can adjust the height and angle of the suction nozzle body 80 according to road conditions to improve dust collection efficiency. The hydraulic drive unit 91 solves the problem of frequently needing to manually remove bolts to adjust the height of the suction nozzle 80 from the ground, allowing for one-button electronic adjustment of the height. The addition of a gas spring 92 within the axle 20 solves the problem of strong impacts from uneven road surfaces, increases cushioning, extends bearing life, and reduces the side effects of changing from two-point support to single-point support.

[0065] This embodiment discloses a sweeper, such as Figure 7 , Figure 8 As shown, the sweeper may include: vehicle body 100 and suction system 110.

[0066] The vehicle body 100 is a key component of the sweeper, and the suction system 110 is detachably connected to it. The first hub 30 in the suction system 110 is located on the side of the axle 20 closest to the center of the vehicle body 100. The vehicle body 100 is the part of the sweeper that carries garbage, passengers, and various components, and it also serves as the foundation for installing and connecting other parts of the vehicle. When the sweeper is traveling on the road, the suction body 80 generates negative pressure, and garbage is sucked into the suction body 80 under this negative pressure and transferred to the vehicle body 100, thus cleaning the garbage on the ground. The overall design of the sweeper's components is compact and reasonable, making it very easy to operate, use, and maintain the components of the vehicle body 100.

[0067] Those skilled in the art will understand that the above embodiments are specific examples of implementing this disclosure, and in practical applications, various changes can be made in form and detail without departing from the scope of this disclosure.

Claims

1. A nozzle wheel assembly, characterized by, The nozzle wheel assembly comprises: a bracket; a wheel shaft, one end of which is detachably connected with the bracket; a first hub, comprising a supporting sleeve, a first spoke and a first rim; the supporting sleeve is coaxial with and rotationally connected with the wheel shaft; the supporting sleeve and the first spoke are integrally formed; the first spoke is located at the outer circumferential side of the supporting sleeve; the first rim is integrally formed with the first spoke; the first rim is located at the outer circumferential side of the first spoke; a second hub, comprising a second spoke and a second rim; the second rim is integrally formed with the second spoke; the second rim is located at the outer circumferential side of the second spoke; the second spoke is detachably connected with the first spoke; the abutting surface of the second spoke and the first spoke is defined as a reference surface, the first rim and the second rim are symmetrically arranged about the reference surface; the bracket is located at the side of the first hub away from the second hub; a sealing and lubricating assembly, which is detachably connected with the wheel shaft and the supporting sleeve; a tire, which is sleeved on the outer circumferential side of the first rim and the second rim; the sealing and lubricating assembly, the wheel shaft and the supporting sleeve cooperatively form an oil lubrication sealing cavity; the sealing and lubricating assembly comprises an end cover, an oil seal unit, a plurality of connecting bearings and an axial locking unit; the end cover is detachably connected with the supporting sleeve; the end cover is located at the end of the supporting sleeve away from the bracket; the oil seal unit is detachably connected with the supporting sleeve and the wheel shaft; the end cover, the oil seal unit, the supporting sleeve and the wheel shaft cooperatively form the oil lubrication sealing cavity; the connecting bearings are detachably connected with the supporting sleeve and the wheel shaft; the connecting bearings are located in the oil lubrication sealing cavity; the axial locking unit comprises a locking collar, a locking washer and a locking nut; the locking collar is sleeved on the wheel shaft; the connecting bearing farthest from the bracket abuts against the side of the locking collar facing the bracket; the locking washer is sleeved on the wheel shaft; the locking washer abuts between the locking collar and the locking nut; the locking nut is threadedly connected with the wheel shaft.

2. The nozzle wheel assembly according to claim 1, wherein the locking washer comprises a washer body and a plurality of clamping plates; the washer body is sleeved on the wheel shaft; the washer body abuts between the locking collar and the locking nut; the plurality of clamping plates are integrally formed with the washer body, and the plurality of clamping plates are uniformly distributed about the circumference of the washer body; the outer circumferential side of the locking nut is provided with a plurality of clamping grooves.

3. The nozzle wheel assembly according to claim 1, wherein The nozzle wheel assembly further comprises a fastening assembly; the fastening assembly comprises a plurality of fastening bolts, a plurality of fastening nuts, and a pressing unit; the fastening bolts and the fastening nuts are in one-to-one correspondence; the fastening bolts are arranged in the first hub and the second hub; the fastening nuts are threadedly connected with the corresponding fastening bolts; the fastening nuts are located on the side of the first hub away from the second hub; the pressing unit is detachably connected between the support and the first hub; the pressing unit exerts an elastic force on the support and the fastening nuts, which is parallel to the wheel shaft.

4. The nozzle wheel assembly according to claim 3, wherein, the pressing unit comprises an elastic part, a positioning ring, and a rotating ring; the positioning ring is coaxial with the wheel shaft; the positioning ring is coaxial with the rotating ring and is rotationally connected with the rotating ring; the wheel shaft is arranged in the positioning ring; the elastic part is detachably connected between the support and the positioning ring; and the rotating ring is fixedly connected with the fastening nuts.

5. The nozzle wheel assembly according to claim 4, wherein, the elastic part comprises a tension spring and a compression spring; in the state that the nozzle wheel assembly is assembled on the sweeper, the axis of the tension spring is located above the axis of the wheel shaft; and the compression spring is located below the axis of the wheel shaft.

6. A mouthpiece system characterized by, The nozzle system comprises: a plurality of nozzle wheel assemblies according to any one of claims 1-5; a nozzle body; the plurality of nozzle wheel assemblies are distributed around the nozzle body; the supports of the nozzle wheel assemblies are detachably connected with the nozzle body; a hydraulic lifting assembly; the hydraulic lifting assembly comprises a hydraulic drive unit and an oil-gas spring; the hydraulic drive unit is detachably connected with the nozzle body and the nozzle wheel assemblies, respectively; the hydraulic lifting assembly drives the nozzle body to move relative to the nozzle wheel assemblies; the moving direction of the nozzle body driven by the hydraulic lifting assembly is perpendicular to the axial direction of the wheel shaft of the nozzle wheel assemblies; and the oil-gas spring is detachably connected with the hydraulic lifting assembly.

7. A sweeper characterized by The sweeper comprises: a vehicle body; the nozzle system according to claim 6; the nozzle system is detachably connected with the vehicle body; and the first hub in the nozzle system is located on the side of the wheel shaft close to the center of the vehicle body.

Images