Suction nozzle wheel assembly, suction nozzle system and motor sweeper

Abstract

The invention relates to the technical field of motor sweepers, in particular to a suction nozzle wheel assembly, a suction nozzle system and a motor sweeper. A nozzle wheel assembly may include a bracket, an axle, a first hub, a second hub, a seal lubrication assembly, and a tire. One end of the wheel shaft is detachably connected with the support. The first hub comprises a supporting sleeve, a first spoke and a first rim. The supporting sleeve and the wheel shaft are coaxial and rotationally connected. 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 second hub comprises a second spoke and a second rim. The sealing and lubricating assembly is detachably connected with the wheel shaft. The sealing lubricating assembly is detachably connected with the supporting sleeve. The tire is arranged on the outer circumferential sides of the first rim and the second rim in a sleeving mode. A suction nozzle system may include a suction nozzle body and a hydraulic lift assembly. A motor sweeper may include a vehicle body and a suction nozzle system. In this way, the problem that the steps of replacing the tire of the suction nozzle wheel are tedious is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of sweepers, and in particular to a suction nozzle wheel assembly, a suction nozzle system and a sweeper. Background Art

[0002] After years of development, the road sweeper has developed from a single pure sweeping type to a variety of types. As one of the sanitation equipment, the road sweeper can be widely used for sweeping trunk roads, urban residential areas, parks and other roads. The road sweeper is a new type of efficient sweeping equipment that integrates road sweeping, garbage collection and transportation. The road sweeper is usually composed of a body, a chassis, a sweeping device, etc. The sweeping device generally generates negative pressure by the suction nozzle, sucks in the garbage swept by the brush to the middle of the vehicle, and transports it to the garbage bin. When the suction nozzle is working, it not only collects garbage, but also removes dust and purifies the air medium on the road, which helps to maintain environmental hygiene and road beauty. The suction nozzle wheel, as a part of the suction nozzle system, is a special mechanical component that can be composed of tires, wheels, bearings, brackets, etc. 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] Due to factors such as vehicle operating speed and working environment, the suction nozzle is generally equipped with multiple suction cavities, which leads to excessive size and weight of the suction nozzle, greatly increasing the load on the suction nozzle wheel, and placing high requirements on the quality and life of the suction nozzle wheel. The suction nozzle wheel will wear more, so the tire of the suction nozzle wheel needs to be replaced regularly. When replacing the tire of the suction nozzle wheel, it is necessary to remove the wheel hubs at both ends and then replace the tire. This takes too long to replace the tire, the workload is large, and the steps are cumbersome. Summary of the invention

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

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

[0006] Bracket;

[0007] an axle, one end of which is detachably connected to the bracket;

[0008] A first wheel hub, the first wheel hub comprising a support sleeve, a first spoke and a first rim; the support sleeve is coaxial with the wheel axle and is rotatably connected; the support sleeve and the first spoke are integrally formed; the first spoke is located on the outer circumference side of the support sleeve; the first rim and the first spoke are integrally formed; the first rim is located on the outer circumference side of the first spoke;

[0009] a second wheel hub, the second wheel hub comprising a second wheel spoke and a second wheel rim; the second wheel rim and the second wheel spoke are integrally formed; the second wheel rim is located on the outer circumference side of the second wheel spoke; the second wheel spoke is detachably connected to the first wheel spoke; the fitting surface of the second wheel spoke and the first wheel spoke is defined as a reference surface, the first wheel rim and the second wheel rim are symmetrically arranged about the reference surface; the bracket is located on the side of the first wheel hub away from the second wheel hub;

[0010] A sealing and lubricating assembly, wherein the sealing and lubricating assembly is detachably connected to the wheel axle; the sealing and lubricating assembly is detachably connected to the supporting sleeve;

[0011] A tire is mounted on the outer circumference of the first rim and the second rim.

[0012] In some embodiments, the sealing and lubricating assembly, the wheel axle and the supporting sleeve cooperate to form an oil-lubricated sealing cavity.

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

[0014] An end cap, the end cap is detachably connected to the support sleeve; the end cap is located at an end of the support sleeve away from the bracket;

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

[0016] A plurality of connecting bearings, wherein the connecting bearings are detachably connected to the supporting sleeve; the connecting bearings are detachably connected to the wheel axle; and the connecting bearings are located in the oil-lubricated sealing cavity.

[0017] In some embodiments, the sealing and lubrication assembly also includes an axial locking unit; the axial locking unit includes a locking retaining ring, a locking washer and a locking nut; the locking retaining ring is sleeved on the wheel axle; the connecting bearing farthest from the bracket is pressed against the side of the locking retaining ring facing the bracket; the locking washer is sleeved on the wheel axle; the locking washer is pressed between the locking retaining ring and the locking nut; the locking nut is threadedly connected to the wheel axle.

[0018] In some embodiments, the locking washer includes a washer body and a plurality of clip plates; the washer body is sleeved on the wheel axle; the washer body is tightly pressed between the locking retaining ring and the locking nut; the plurality of clip plates are integrally formed with the washer body, and the plurality of clip plates are evenly distributed around the circumference of the washer body; and a plurality of clip grooves are opened on the outer circumference of the locking nut.

[0019] In some embodiments, the suction nozzle wheel assembly also includes a fastening assembly; the fastening assembly includes a plurality of fastening bolts, a plurality of fastening nuts and a tightening unit; the fastening bolts and the fastening nuts correspond to each other one by one; the fastening bolts are passed through the first wheel hub and the second wheel hub; the fastening nuts are threadedly connected to the corresponding fastening bolts; the fastening nuts are located on the side of the first wheel hub away from the second wheel hub; the tightening unit is detachably connected between the bracket and the first wheel hub; the tightening unit applies an elastic force parallel to the wheel axle to the bracket and the fastening nut.

[0020] In some embodiments, the clamping unit includes an elastic part, a positioning ring and a rotating ring; the positioning ring is coaxial with the wheel axle; the positioning ring is coaxial with the rotating ring and is rotatably connected; the wheel axle passes through the positioning ring; the elastic part is detachably connected between the bracket and the positioning ring; the rotating ring is fixedly connected to the fastening nut.

[0021] In some embodiments, the elastic part includes a tension spring and a compression spring. When the suction nozzle wheel assembly is assembled on the sweeper, the axis of the tension spring is located above the axis of the wheel axle; the compression spring is located below the axis of the wheel axle.

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

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

[0024] A nozzle body; a plurality of nozzle wheel assemblies are distributed around the nozzle body; a bracket of the nozzle wheel assembly is detachably connected to the nozzle body;

[0025] A hydraulic lifting assembly, the hydraulic lifting assembly comprising a hydraulic drive unit and an oil-gas spring; the hydraulic drive unit is detachably connected to 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, and the movement direction of the nozzle body driven by the hydraulic lifting assembly is perpendicular to the axial direction of the wheel axle of the nozzle wheel assembly; the oil-gas spring is detachably connected to the hydraulic lifting assembly.

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

[0027] Vehicle body;

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

[0029] In order to solve the problem that the steps of the suction nozzle wheel are complicated when replacing the tire, the present invention has the following advantages:

[0030] By dividing the wheel hub into a first wheel hub and a second wheel hub of different sizes, and the second wheel hub is smaller and not directly connected to the wheel axle, when the tire needs to be replaced, only the second wheel hub needs to be disassembled, and there is no need to remove the connection between the first wheel hub and the bracket, and there is no need to remove the sealing structure between the first wheel hub and the wheel axle, thereby reducing the time and workload of changing the tire. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0032] Figure 2 Shows Figure 1 A schematic cross-sectional view of the nozzle wheel assembly along the AA direction;

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

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

[0035] Figure 5 Shows Figure 4 A schematic cross-sectional view of the nozzle wheel assembly along the BB direction;

[0036] Figure 6 A schematic diagram of abutting unit in another embodiment is shown;

[0037] Figure 7 A schematic diagram showing a nozzle system of yet another embodiment;

[0038] Figure 8 A schematic diagram of a sweeper according to an embodiment is shown.

[0039] Reference numerals: bracket 10; axle 20; positioning 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 retaining ring 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 retaining ring 541; locking washer 542; washer body 5421; snap-on plate 5422; locking nut 543; slot 5431; oil plug 55; visible oil mirror 56; tire 60; fastening assembly 70; fastening bolt 71; fastening nut 72; tightening 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 exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, rather than implying any limitation on the scope of the present disclosure.

[0041] As used herein, the term "including" and its variants are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is 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 orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like is based on the orientation or position relationship shown in the accompanying drawings. These terms are mainly for better describing the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, in addition to being used to indicate an orientation or position relationship, some of the above terms may also be used to indicate other meanings, such as the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances. In addition, the terms "install", "set", "provided with", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0042] A road sweeper is a mechanical device specially used for road cleaning, which can be composed of a vehicle body, a chassis, a sweeping device, etc. The sweeping device can include a suction nozzle system. The suction nozzle system can include a suction nozzle body and a number of suction nozzle wheels distributed around the suction nozzle body. The suction nozzle wheel is part of the suction nozzle system, which can bear the weight of the suction nozzle body, so that the suction nozzle body maintains a certain gap with the ground, and the suction nozzle body can rely on the suction nozzle wheel to follow the sweeper. The suction nozzle wheel can be composed of a bracket, a wheel hub, a tire, an axle and a sealing component. The bracket is fixed to both ends of the axle, and the wheel hub is evenly divided into two halves along the direction perpendicular to the axis of the axle. The rims of the two halves of the wheel hub jointly support and axially limit the tire. When replacing the tire, the two halves of the wheel hub need to be separated to remove the tire for replacement. The fixing of the two halves of the wheel hub to the axle depends on the fixing of the bracket and the axle, and the sealing assembly is also fixed to the axle through the bracket. Therefore, when replacing a tire, in order to separate the two halves of the wheel hub, the suction nozzle wheel needs to be removed from the bracket as a whole, that is, the two ends of the wheel axle need to be removed from the bracket respectively, so that the suction nozzle wheel can be taken out of the bracket as a whole. In this replacement method, removing the wheel hub also requires removing the sealing assembly connecting the wheel hub and the wheel axle, so disassembly and assembly is extremely inconvenient and easily destroys the sealing effect of the sealing structure.

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

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

[0045] like Figure 2 As shown, the bracket 10 is an important component of the nozzle wheel. The bracket 10 can keep the nozzle wheel in a stable position and angle. At the same time, it can also protect the nozzle wheel from external impact and damage to a certain extent, thereby extending its service life.

[0046] The wheel axle 20 can play a key role in the suction nozzle wheel device. The wheel axle 20 needs to be arranged parallel to the horizontal plane. The suction nozzle wheel can rotate around the wheel axle 20, and the wheel axle 20 can make the position and angle of the suction nozzle wheel more stable. One end of the wheel axle 20 can be detachably connected to the bracket 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 coaxial with the wheel axle 20 and rotatably connected. The support sleeve 31 may be integrally formed with the first spoke 32. The first spoke 32 may be located on the outer circumference side 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 side of the first spoke 32. The spokes may 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, and 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 circumferential side of the second spoke 41. The second spoke 41 may be detachably connected to the first spoke 32. The fitting surface of the second spoke 41 and the first spoke 32 may be defined as a reference surface, and the reference surface may be perpendicular to the axis of the axle 20. The first rim 33 may be symmetrically arranged with the second rim 42 about the reference surface. The bracket 10 is located on the side of the first hub 30 facing 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 is different from the two connection parts in the related art.

[0049] The sealing and lubricating assembly 50 plays a vital role as a barrier in the suction nozzle wheel. The sealing and lubricating assembly 50 can be detachably connected to the wheel axle 20. The sealing and lubricating assembly 50 can be detachably connected to the support sleeve 31. The support sleeve 31 in the first wheel hub 30 can be fixed on the wheel axle 20 by the cooperation of the sealing and lubricating assembly 50 and the bracket 10. Since the bracket 10 does not block the disassembly of the second wheel hub 40, the second wheel hub 40 can be directly removed from the first wheel hub 30, so the sealing and lubricating assembly 50 does not need to be removed when changing the tire 60. Thereby, the leakage of the lubricating medium can be prevented, and external impurities such as dust and moisture can be prevented from invading the interior of the sealing and lubricating assembly 50. That is, the interior of the sealing and lubricating assembly 50 can be protected from the external environment, while preventing external pollutants to ensure the normal operation of the suction nozzle wheel and extend its service life. In this way, the sealing of the sealing and lubricating assembly 50 can be effectively guaranteed.

[0050] The tire 60 is sleeved on the outer circumference of the first wheel rim 33 and the second wheel rim 42. The tire 60 is fixed on the wheel hub by the support and axial limit of the first wheel rim 33 and the second wheel rim 42. When replacing the tire 60, there is no need to dismantle the connection between the bracket 10 and the axle 20, and there is no need to remove the sealing and lubricating 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, thereby achieving the effect of quickly replacing the tire 60.

[0051] In this embodiment, if Figure 2 As shown, the sealing and lubricating 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 replacing the tire 60, the sealing effect is not easily affected, and a good seal can be maintained, and lubricating oil can be selected as the lubricating medium.

[0052] If the sealing structure needs to be removed when replacing the tire 60, thus affecting the sealing effect, the lubricating medium usually uses grease with strong adhesion and poor fluidity to avoid grease leakage as much as possible. However, once the grease is mixed with impurities such as water and dust, these impurities are difficult to separate, thereby affecting the lubrication effect and causing damage to the shaft. In addition, the grease is semi-solid, so it is difficult to add fat, change fat and clean it. Therefore, the oil lubrication sealing cavity can be lubricated with oil with better lubrication effect. Compared with grease, lubricating oil is liquid and has good fluidity. It can quickly penetrate into the friction surface to form a uniform oil film to reduce friction and wear. It also has strong heat dissipation performance and is easy to separate impurities, thereby achieving a long-term maintenance-free effect.

[0053] In this embodiment, if Figure 2 As shown, the sealing and lubricating assembly 50 may include an end cover 51 , an oil seal unit 52 and a plurality of connecting bearings 53 .

[0054] The end cover 51 can prevent external dust and impurities from entering the interior of the sealing and lubricating assembly 50. The end cover 51 is detachably connected to the support sleeve 31. The end cover 51 is located at the end of the support sleeve 31 away from the bracket 10. A removable oil plug 55 is connected to the end cover 51, and the direction of the oil plug 55 is staggered with the axial direction of the axle 20. A removable visual oil mirror 56 is also connected to the end cover 51, and the direction of the visual oil mirror 56 is parallel to the axial direction of the axle 20. The visual oil mirror 56 can be used to observe the internal components and lubricating oil of the oil lubrication sealing cavity. The oil plug 55 can be pulled out and the required lubricating oil can be added. In this way, the effect of maintaining the sealing and lubricating assembly 50 can be achieved without disassembling the sealing and lubricating assembly 50. Thereby effectively preventing the components and lubricating oil inside the sealing and lubricating assembly 50 from being damaged and contaminated.

[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 oil seal unit 52 is detachably connected to the wheel axle 20. The wheel axle 20 has a positioning shoulder 21, and the thrust ring 521 is pressed against the positioning shoulder 21, and the connecting bearing 53 closest to the bracket 10 is pressed against the side of the thrust ring 521 away from the positioning shoulder 21. The skeleton oil seal 522 is annular and pressed between the thrust ring 521 and the support sleeve 31. The elastic sealing ring 523 is coaxial with the skeleton oil seal 522, and the elastic sealing ring 523 is detachably connected to the skeleton oil seal 522. The elastic sealing ring 523 has an elastic tightening force on the skeleton oil seal 522 to drive the inner circumferential wall of the skeleton oil seal 522 to have a tendency to shrink. Since the oil-lubricated sealing chamber can isolate the parts of the transmission components that need lubrication 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 lubricating assembly 50 is detachably connected to the support sleeve 31, and the connecting bearing 53 is detachably connected to the wheel axle 20, and the connecting bearing 53 is located in the oil lubrication sealing chamber. The connecting bearing 53 may include an inner ring 531, an outer ring 532, and a plurality of rolling bodies 533. The outer ring 532 is located on the outer circumferential side of the inner ring 531, and the plurality of rolling bodies 533 are tightly pressed between the inner ring 531 and the outer ring 532. The inner ring 531 of the connecting bearing 53 closest to the bracket 10 is in contact with the thrust retaining ring 521. There is a gap between the outer ring 532 of the connecting bearing 53 closest to the bracket 10 and the thrust retaining ring 521. The connecting bearing 53 is a tapered roller bearing. The bearing can automatically adjust the axis deviation, so that the connecting bearing 53 can be evenly stressed, thereby reducing wear and extending its service life. Avoiding frequent replacement of the connecting bearing 53 can reduce the number of maintenance times.

[0057] In this embodiment, if Figure 2 As shown, the sealing and lubricating 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 sleeved on the wheel axle 20. The connecting bearing 53 farthest from the bracket 10 is pressed against the side of the locking retaining ring 541 facing the bracket 10. The locking retaining ring 541 has high strength and stability. The locking retaining ring 541 can ensure that the fitting clearance between the connecting bearing 53 and the locking washer 542 is appropriate to avoid being too tight or too loose. The locking washer 542 is sleeved on the wheel axle 20. The locking washer 542 is pressed between the locking retaining ring 541 and the locking nut 543, and the locking nut 543 is threadedly connected to the wheel axle 20. The locking force is generated by the locking unit, and the locking unit is fixed on the wheel 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 wheel axle 20.

[0058] In this embodiment, if Figure 2 , Figure 3 As shown, the locking washer 542 may include a washer body 5421 and a plurality of snap-on plates 5422. The washer body 5421 may be sleeved on the axle 20, and the washer body 5421 may be pressed against between the locking retainer ring 541 and the locking nut 543. The plurality of snap-on plates 5422 are integrally formed with the washer body 5421, and the plurality of snap-on plates 5422 are evenly distributed around the circumference of the washer body 5421, and a plurality of snap-on grooves 5431 may be provided on the outer circumference of the locking nut 543. The plurality of snap-on plates 5422 of the locking washer 542 may be snap-on in the snap-on grooves 5431 of the locking nut 543, and the number of the snap-on grooves 5431 and the snap-on plates 5422 does not need to correspond one to one, and only one snap-on plate 5422 is required to be snap-on to the locking nut 543. The shapes of the snap-on plates 5422 and the snap-on grooves 5431 match. By clamping multiple clamping plates 5422 in the clamping grooves 5431 of the locking nut 543, additional locking force can be generated when the locking nut 543 is tightened, so that the locking nut 543 can be more firmly connected to the axle 20 through the structure of the locking nut 543 and the clamping plates 5422.

[0059] In another embodiment, if Figure 4 , Figure 5 As shown, the nozzle wheel assembly may further include a fastening assembly 70. The fastening assembly 70 may include a plurality of fastening bolts 71, a plurality of fastening nuts 72 and a tightening unit 73. The fastening bolts 71 and the fastening nuts 72 correspond one to one. The fastening bolts 71 may be inserted through the first hub 30 and the second hub 40. The fastening nuts 72 are threadedly connected to the corresponding fastening bolts 71. The fastening nuts 72 are located on the side of the first hub 30 away from the second hub 40. The tightening unit 73 is detachably connected between the bracket 10 and the first hub 30. The tightening unit 73 applies an elastic force parallel to the wheel axle 20 to the bracket 10 and the fastening nut 72. The fastening nut 72 is not easy to rotate when it is subjected to the load caused by the bumps, thereby improving the connection stability between the first hub 30 and the second hub 40. The tightening unit 73 can axially buffer the bumps borne by the nozzle wheel during walking, thereby compensating for the disadvantage of insufficient support effect caused by the single-point fixation of the bracket 10.

[0060] In this embodiment, if Figure 5 , Figure 6As shown, the pressing unit 73 may include an elastic portion 731, a positioning ring 732 and a rotating ring 733. The positioning ring 732 is coaxial with the wheel axle 20, and the positioning ring 732 and the bracket 10 do not rotate when the vehicle is traveling. The positioning ring 732 is coaxial with the rotating ring 733 and is rotatably connected. The wheel axle 20 may be inserted into the positioning ring 732. The elastic portion 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 portion 731 is stably fixed on the positioning ring 732, and the rotating ring 733 moves with the wheel axle 20. The impact force of the nozzle wheel caused by environmental influences such as the road surface during walking can be buffered. Thereby further compensating for the disadvantage of insufficient support effect caused by single-point fixation of the bracket 10.

[0061] In this embodiment, if 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 wheel assembly is assembled on the sweeper, the axis of the tension spring 7311 may be located above the axis of the wheel axle 20. The number of tension springs 7311 may be one, and the rebound force after stretching may be used to prevent the bracket 10 from tilting. The compression spring 7312 may be located below the axis of the wheel axle 20, and the number of compression springs 7312 may be three. The large elastic force of the compression spring 7312 can be used to buffer and absorb vibrations. When the suction nozzle body 80 sucks garbage on the ground, negative pressure will be generated, resulting in excessive weight, which will cause the bracket 10 to tend to fall inward. Through the cooperation of the tension spring 7311 and the compression spring 7312, the possibility of the bracket 10 tilting downward at one end close to the suction nozzle body 80 can be reduced. Thereby improving stability. During use, the nozzle body 80 is heavy, and the cooperation of the tension spring 7311 and the compression spring 7312 can reduce the possibility of the end of the bracket 10 close to the nozzle body 80 tilting downward.

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

[0063] The suction nozzle body 80 can suck garbage and dust on the ground through negative pressure. A plurality of suction nozzle wheel assemblies can be distributed around the suction nozzle body 80. The bracket 10 of the suction nozzle wheel assembly is detachably connected to the suction nozzle body 80. The suction nozzle body 80 can adapt to different road environments for suction to achieve road cleaning.

[0064] Hydraulic lifting assembly 90, the hydraulic lifting assembly 90 may include a hydraulic drive unit 91 and an oil-gas spring 92. The hydraulic drive unit 91 is detachably connected to the suction nozzle body 80 and the suction nozzle wheel assembly respectively. The hydraulic lifting assembly 90 drives the suction nozzle body 80 to move relative to the suction nozzle wheel assembly, and the movement direction of the hydraulic lifting assembly 90 driving the suction nozzle body 80 is perpendicular to the axial direction of the wheel axle 20 of the suction nozzle wheel assembly. The oil-gas spring 92 is detachably connected to the hydraulic lifting assembly 90. The oil-gas spring 92 can be located inside the wheel axle 20. The hydraulic lifting assembly 90 of the sweeper uses the principle of hydraulic transmission to realize the lifting and lowering actions of various components of the sweeper. The hydraulic lifting assembly 90 has the advantages of strong bearing capacity, good stability, and precise control. In the sweeper, the hydraulic lifting system can be used for adjusting the suction nozzle body 80. Adjust to meet different garbage collection needs. The hydraulic lifting assembly 90 can adjust the height and angle of the suction nozzle body 80 according to the road conditions to improve the dust collection effect. The hydraulic drive unit 91 solves the problem that the height of the nozzle body 80 from the ground needs to be adjusted by manual removal of bolts frequently, and the height from the ground can be adjusted by electronic control with one button. Adding an oil-gas spring 92 in the wheel axle 20 solves the strong impact problem of uneven roads, increases buffering, improves the service life of the bearing, and reduces the side effects caused by changing the two-point support to a single-point support.

[0065] In this embodiment, a cleaning vehicle is disclosed, such as Figure 7 , Figure 8 As shown, the cleaning vehicle may include: a vehicle body 100 and a suction nozzle system 110 .

[0066] The vehicle body 100 is a key part of the sweeper, and the suction nozzle system 110 is detachably connected to the vehicle body 100. The first hub 30 in the suction nozzle system 110 is located on the side of the axle 20 close to the center of the vehicle body 100. The vehicle body 100 is the part of the sweeper for loading garbage, passengers and various components, and is also the basis for installing and connecting other components of the vehicle. When the sweeper is driving on the road, the suction nozzle body 80 generates negative pressure, and the garbage is sucked into the suction nozzle body 80 under the action of the negative pressure and transferred to the vehicle body 100. Thereby, the garbage on the ground is cleaned. The overall design of each component of the sweeper is compact and reasonable, which is very convenient for operation and maintenance of the vehicle body 100 components.

[0067] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present disclosure, and in actual applications, various changes may be made thereto in form and detail without departing from the scope of the present disclosure.

Claims

1. A nozzle wheel assembly, characterized in that: The nozzle wheel assembly comprises: Bracket; an axle, one end of which is detachably connected to the bracket; A first wheel hub, the first wheel hub comprising a support sleeve, a first spoke and a first rim; the support sleeve is coaxial with the wheel axle and is rotatably connected; the support sleeve and the first spoke are integrally formed; the first spoke is located on the outer circumference side of the support sleeve; the first rim and the first spoke are integrally formed; the first rim is located on the outer circumference side of the first spoke; a second wheel hub, the second wheel hub comprising a second wheel spoke and a second wheel rim; the second wheel rim and the second wheel spoke are integrally formed; the second wheel rim is located on the outer circumference side of the second wheel spoke; the second wheel spoke is detachably connected to the first wheel spoke; the fitting surface of the second wheel spoke and the first wheel spoke is defined as a reference surface, the first wheel rim and the second wheel rim are symmetrically arranged about the reference surface; the bracket is located on the side of the first wheel hub away from the second wheel hub; A sealing and lubricating assembly, wherein the sealing and lubricating assembly is detachably connected to the wheel axle; the sealing and lubricating assembly is detachably connected to the supporting sleeve; A tire is mounted on the outer circumference of the first rim and the second rim.

2. A nozzle wheel assembly according to claim 1, characterized in that: The sealing and lubricating assembly, the wheel shaft and the supporting sleeve cooperate to form an oil-lubricated sealing cavity.

3. A nozzle wheel assembly according to claim 2, characterized in that: The sealing and lubricating assembly comprises: An end cap, the end cap is detachably connected to the support sleeve; the end cap is located at an end of the support sleeve away from the bracket; An oil seal unit, wherein the oil seal unit is detachably connected to the support sleeve; the oil seal unit is detachably connected to the wheel axle; the end cover, the oil seal unit, the support sleeve and the wheel axle cooperate to form the oil lubricated sealing cavity; A plurality of connecting bearings, wherein the connecting bearings are detachably connected to the supporting sleeve; the connecting bearings are detachably connected to the wheel axle; and the connecting bearings are located in the oil-lubricated sealing cavity.

4. A nozzle wheel assembly according to claim 3, characterized in that: The sealing and lubrication assembly also includes an axial locking unit; the axial locking unit includes a locking retaining ring, a locking washer and a locking nut; the locking retaining ring is sleeved on the wheel axle; the connecting bearing farthest from the bracket is pressed against the side of the locking retaining ring facing the bracket; the locking washer is sleeved on the wheel axle; the locking washer is pressed between the locking retaining ring and the locking nut; the locking nut is threadedly connected to the wheel axle.

5. A nozzle wheel assembly according to claim 4, characterized in that: The locking washer includes a washer body and a plurality of clip plates; the washer body is sleeved on the wheel axle; the washer body is pressed tightly between the locking retaining ring and the locking nut; the plurality of clip plates are integrally formed with the washer body, and the plurality of clip plates are evenly distributed around the circumference of the washer body; a plurality of clip grooves are provided on the outer circumference of the locking nut.

6. The nozzle wheel assembly according to claim 1, characterized in that: The suction nozzle wheel assembly also includes a fastening component; the fastening component includes a plurality of fastening bolts, a plurality of fastening nuts and a tightening unit; the fastening bolts and the fastening nuts correspond to each other one by one; the fastening bolts are passed through the first wheel hub and the second wheel hub; the fastening nuts are threadedly connected with the corresponding fastening bolts; the fastening nuts are located on the side of the first wheel hub away from the second wheel hub; the tightening unit is detachably connected between the bracket and the first wheel hub; the tightening unit applies an elastic force parallel to the wheel axle to the bracket and the fastening nut.

7. A nozzle wheel assembly according to claim 6, characterized in that: The clamping unit includes an elastic part, a positioning ring and a rotating ring; the positioning ring is coaxial with the wheel axle; the positioning ring is coaxial with the rotating ring and is rotatably connected; the wheel axle passes through the positioning ring; the elastic part is detachably connected between the bracket and the positioning ring; the rotating ring is fixedly connected to the fastening nut.

8. A nozzle wheel assembly according to claim 7, characterized in that: The elastic part includes a tension spring and a compression spring. When the nozzle wheel assembly is assembled on the sweeper, the axis of the tension spring is located above the axis of the wheel axle; and the compression spring is located below the axis of the wheel axle.

9. A nozzle system, characterized in that: The nozzle system comprises: A plurality of nozzle wheel assemblies according to any one of claims 1 to 8; A nozzle body; a plurality of nozzle wheel assemblies are distributed around the nozzle body; a bracket of the nozzle wheel assembly is detachably connected to the nozzle body; A hydraulic lifting assembly, the hydraulic lifting assembly comprising a hydraulic drive unit and an oil-gas spring; the hydraulic drive unit is detachably connected to 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, and the movement direction of the nozzle body driven by the hydraulic lifting assembly is perpendicular to the axial direction of the wheel axle of the nozzle wheel assembly; the oil-gas spring is detachably connected to the hydraulic lifting assembly.

10. A sweeper, characterized in that: The sweeper comprises: Vehicle body; The suction nozzle system as described in claim 9; the suction nozzle system is detachably connected to the vehicle body; the first hub in the suction nozzle system is located on the side of the wheel axle close to the center of the vehicle body.

Images