Noise reduction air duct and flow guide device for fan of cleaning and sweeping vehicle

Abstract

The utility model relates to the technical field of cleaning and sweeping vehicles, in particular to a cleaning and sweeping vehicle draught fan noise reduction air channel and flow guide device, a draught fan assembly, a noise reduction assembly and a flow guide assembly are arranged, a draught fan air outlet channel is arranged in a draught fan shell, the noise reduction assembly comprises a noise reduction channel, and the flow guide assembly comprises a flow guide channel. The fan air outlet channel, the noise reduction channel and the flow guide channel are sequentially connected and communicated, the cross sections of the fan air outlet channel, the noise reduction channel and the flow guide channel are sequentially increased, when high-speed airflow generated when the motor drives the fan to rotate sequentially passes through the fan air outlet channel, the noise reduction channel and the flow guide channel, the speed of the airflow is gradually reduced, and the sequentially-increased cross sections can reduce the speed of the airflow; the noise reduction device is beneficial to reducing noise generated by high-speed airflow, and effectively solves the problem that when an existing cleaning and sweeping vehicle normally operates, a motor drives a fan to generate the high-speed airflow to suck dust and garbage on the road surface, but the high-speed airflow is directly discharged into the external atmosphere, and consequently the noise of the whole cleaning and sweeping vehicle is large.

Description

TECHNICAL FIELD

[0001] The utility model relates to a washing and sweeping vehicle technical field, concretely is a kind of washing and sweeping vehicle fan silencer air duct and flow guide device. BACKGROUND

[0002] With the acceleration of urbanization process and the continuous improvement of environmental sanitation demand, washing and sweeping vehicle as a kind of efficient, multi-functional road cleaning equipment emerges as the times require.Washing and sweeping vehicle integrates high-pressure washing, mechanical cleaning and garbage collection, can efficiently remove dust, fallen leaves, chippings and all kinds of stubborn stains on the road surface, not only significantly improves the cleanliness and health level of urban road, but also effectively reduces the labor intensity of environmental sanitation workers, becomes the indispensable important tool in modern urban environmental health management.

[0003] The existing washing and sweeping vehicle is usually provided with motor and fan, and the motor drives the fan to rotate to generate high-speed airflow to suck dust and garbage on the road surface, however, these high-speed airflows are directly discharged to the external atmosphere, which causes large noise during normal operation of the washing and sweeping vehicle, not only affects the harmony of urban environment, but also causes interference to daily life of citizens.

[0004] The utility model is proposed in view of the deficiency of prior art. CONTENT OF UTILITY MODEL

[0005] In view of the above-mentioned problem that the motor drives the fan to generate high-speed airflow to suck dust and garbage on the road surface during normal operation of the existing washing and sweeping vehicle, however, these high-speed airflows are directly discharged to the external atmosphere, which causes large noise of the whole washing and sweeping vehicle, the utility model solves the technical problem by adopting the technical scheme of:

[0006] A washing and sweeping vehicle fan silencer air duct and flow guide device, comprising fan assembly, silencer assembly and flow guide assembly, the fan assembly comprises fan, motor for driving the fan to operate and fan housing for installing the fan and motor, the fan housing is provided with fan air outlet channel extending towards the silencer assembly, the silencer assembly comprises silencer channel communicated with the fan air outlet channel, the flow guide assembly comprises flow guide channel communicated with the silencer channel, the cross section of the fan air outlet channel, silencer channel and flow guide channel increases in turn.

[0007] Further, the fan housing is provided with fan air outlet communicated with the fan air outlet channel, the silencer assembly comprises silencer housing, the silencer housing is provided with silencer air inlet and silencer air outlet corresponding to the fan air outlet, the silencer channel is communicated with the silencer air inlet and silencer air outlet respectively, and the cross section of the silencer channel increases from the silencer air inlet to the silencer air outlet.

[0008] Further, the flow guide assembly comprises a flow guide shell, the flow guide shell is equipped with a flow guide inlet and a flow guide outlet, the flow guide channel is communicated with the flow guide inlet and the flow guide outlet respectively, and the cross section of the flow guide channel increases from the flow guide inlet to the flow guide outlet.

[0009] Further, the fan shell and the muffler shell are equipped with a connecting mechanism, the fan shell is connected with the muffler shell through the connecting mechanism.

[0010] Further, the connecting mechanism comprises a first flange plate on the fan shell and communicated with the fan outlet, a second flange plate on the muffler shell and communicated with the muffler inlet, and a mounting bracket communicated with the fan outlet and the muffler inlet respectively, and the mounting bracket is screwed with the first flange plate and the second flange plate respectively.

[0011] Further, the muffler shell is equipped with a third flange plate communicated with the muffler outlet, and the flow guide shell is equipped with a fourth flange plate communicated with the flow guide inlet and screwed with the third flange plate.

[0012] Further, the motor is equipped with a damping mechanism, the damping mechanism comprises a fixed support fixedly arranged on the sweeper, a connecting support detachably connected with the motor, and a rubber block between the fixed support and the connecting support.

[0013] Further, the muffling assembly further comprises a noise reduction plate and a mesh plate in the muffler shell, and the noise reduction plate and the mesh plate are arranged along the extending direction of the muffling channel.

[0014] Further, the flow guide shell comprises an upper plate and a groove plate, the upper plate and the groove plate are connected in an inclined manner to form an included angle α, and 15°≤ included angle α≤ 45°.

[0015] Further, the flow guide shell is equipped with a shockproof mechanism, the shockproof mechanism comprises a first shockproof support on the flow guide shell, a second shockproof support connected with the first shockproof support, and a shockproof block between the first shockproof support and the second shockproof support.

[0016] The beneficial effects of the utility model are as follows:

[0017] 1.The utility model discloses a fan assembly, sound elimination assembly and flow guide assembly are set up, and the fan casing is equipped with fan outlet passage, and sound elimination assembly includes sound elimination passage, and flow guide assembly includes flow guide passage, and the fan outlet passage, sound elimination passage and flow guide passage are connected in turn and communicate, and the cross section increases gradually, when the high speed airflow produced by the motor drive fan rotation passes through the fan outlet passage, sound elimination passage and flow guide passage in turn, the speed of airflow gradually reduces, and the setting of cross section increasing gradually can reduce the speed of airflow, is favorable to reduce the noise produced by high speed airflow, effectively solve the problem that the motor drive fan produces high speed airflow to suck the dust and rubbish of road surface when the current washing and sweeping vehicle normal operation, however, these high speed airflow is directly discharged to the external atmosphere, leads to the problem that the whole vehicle noise of washing and sweeping vehicle is big.

[0018] 2.Through setting damping mechanism on the motor and setting shockproof mechanism on the flow guide shell, the damping mechanism can effectively absorb and reduce the vibration produced when the motor works, thereby reducing the noise and vibration amplitude when the motor operates, and the shockproof mechanism can further reduce the noise produced by airflow impact and mechanical vibration, which is favorable to improve the overall mute performance of the washing and sweeping vehicle.

[0019] The utility model will be further described below in combination with the drawings and specific embodiment. DRAWINGS

[0020] Figure 1 It is the structural schematic diagram of fan assembly, sound elimination assembly and flow guide assembly of the utility model connection;

[0021] Figure 2 It is the one of exploded schematic diagram of fan assembly, sound elimination assembly and flow guide assembly of the utility model connection;

[0022] Figure 3 It is the second of exploded schematic diagram of fan assembly, sound elimination assembly and flow guide assembly of the utility model connection;

[0023] Figure 4 It is the structural schematic diagram of sound elimination assembly of the utility model;

[0024] Figure 5 It is the exploded schematic diagram of damping mechanism of the utility model;

[0025] Figure 6 It is the exploded schematic diagram of flow guide assembly of the utility model;

[0026] Figure 7 It is the one of structural schematic diagram of flow guide assembly of the utility model;

[0027] Figure 8 It is the second of structural schematic diagram of flow guide assembly of the utility model. SPECIFIC EMBODIMENT

[0028] The embodiments of the utility model will be explained in detail below with reference to the drawings.

[0029] As Figures 1 to 8 The utility model discloses a kind of washing and sweeping vehicle fan silencer air duct and flow guide device, including fan assembly 1, silencer assembly 2 and flow guide assembly 3, the fan assembly 1 includes fan 11, for driving the fan 11 operation motor 12, and for installing the fan 11 and motor 12 fan casing 13, fan casing 13 is equipped with the fan outlet passage 14 extending towards the direction of silencer assembly 2 setting, the silencer assembly 2 includes the silencer passage 21 communicated with the fan outlet passage 14, the flow guide assembly 3 includes the flow guide passage 31 communicated with the silencer passage 21, the fan outlet passage 14, silencer passage 21 and flow guide passage 31 cross section gradually increase in turn;

[0030] The utility model discloses a kind of washing and sweeping vehicle fan silencer air duct and flow guide device, including fan assembly 1, silencer assembly 2 and flow guide assembly 3, the fan assembly 1 includes fan 11, for driving the fan 11 operation motor 12, and for installing the fan 11 and motor 12 fan casing 13, fan casing 13 is equipped with the fan outlet passage 14 extending towards the direction of silencer assembly 2 setting, the silencer assembly 2 includes the silencer passage 21 communicated with the fan outlet passage 14, the flow guide assembly 3 includes the flow guide passage 31 communicated with the silencer passage 21, the fan outlet passage 14, silencer passage 21 and flow guide passage 31 cross section gradually increase in turn, when the high-speed airflow generated by motor driving fan rotation passes through fan outlet passage 14, silencer passage 21 and flow guide passage 31 in turn, the speed of airflow gradually reduces, the setting of cross section gradually increasing can reduce the speed of airflow, it is favorable to reduce the noise generated by high-speed airflow, effectively solve the problem that the noise of washing and sweeping vehicle is large when the motor driving fan generates high-speed airflow to suck the dust and garbage on road surface when the washing and sweeping vehicle normally operates.

[0031] Specifically, when washing and sweeping vehicle normally works, motor 12 drives fan 11 to rotate and generate high-speed airflow, high-speed airflow passes through fan outlet passage 14, silencer passage 21 and flow guide passage 31 in turn, fan outlet passage 14, silencer passage 21 and flow guide passage 31 are connected in turn and communicated, and cross section gradually increases, so that the speed of airflow gradually reduces, if in narrow channel, high-speed airflow is easy to generate vortex and turbulence, vortex and turbulence are one of main sources of noise, and in the channel with gradually increasing cross section, airflow can flow more stably, the generation of vortex and turbulence is inhibited, thereby reducing the generation of noise.

[0032] Further, the number of fan assembly 1 is two and symmetrically arranged, fan 11 is located inside fan casing 13, motor 12 is located on one side of fan casing 13 and is threadedly connected with fan 11.

[0033] As Figures 1 to 8The fan housing 13 shown is provided with a fan outlet 15 communicating with the fan outlet channel 14. The silencer assembly 2 includes a silencer housing 22. The silencer housing 22 is provided with a silencer inlet 23 and a silencer outlet 24 corresponding to the fan outlet 15. The silencer channel 21 communicates with the silencer inlet 23 and the silencer outlet 24 respectively. The cross-section of the silencer channel 21 increases from the silencer inlet 23 to the silencer outlet 24.

[0034] Specifically, the silencing channel 21 is located inside the silencer housing 22. One end of the silencing channel 21 is connected to the silencer air inlet 23, and the other end of the silencing channel 21 is connected to the silencer air outlet 24. The silencer housing 22 includes a first silencing housing near the fan assembly 1 and a second silencing housing connected to the first silencing housing. The silencer air inlet 23 is located on the first silencing housing, and the silencer air outlet 24 is located on the second silencing housing. The first silencing housing extends obliquely toward the second silencing housing and its cross-section gradually increases.

[0035] Optionally, the first silencing housing is frustum-shaped, and the second silencing housing is rectangular.

[0036] Furthermore, the cross-section of the silencing channel 21 gradually increases so that the airflow speed gradually decreases as it passes through, thereby reducing turbulent noise caused by excessive airflow speed.

[0037] like Figures 1 to 8 The flow guiding assembly 3 shown includes a flow guiding housing 32, on which a flow guiding inlet 33 communicating with the silencer outlet 24 and a flow guiding outlet 34 are provided. The flow guiding channel 31 communicates with the flow guiding inlet 33 and the flow guiding outlet 34 respectively, and the cross-section of the flow guiding channel 31 increases from the flow guiding inlet 33 to the flow guiding outlet 34.

[0038] Specifically, the muffler housing 22 is connected to the flow guide housing 32. The cross-section of the flow guide housing 32 is larger than that of the muffler housing 22, so that the airflow entering the flow guide channel 31 through the muffler channel 21 can be more stable, which helps to smoothly discharge the treated airflow, reduce the impact and disturbance when the airflow is discharged, and make the airflow blend into the surrounding atmosphere more smoothly, thereby reducing the generation of noise.

[0039] like Figures 1 to 8 A connecting mechanism 4 is provided between the fan housing 13 and the silencer housing 22 shown, and the fan housing 13 is connected to the silencer housing 22 through the connecting mechanism 4;

[0040] Further, the connecting mechanism 4 provides a stable connection between the fan housing 13 and the muffler housing 22, ensuring the structural stability of the entire system, and helping to prevent loosening or damage caused by vibration or external factors during operation.

[0041] Further, the tight connection of the connecting mechanism 4 helps to ensure the sealing between the fan housing 13 and the muffler housing 22, helping to prevent noise and gas leakage, and effectively improving the noise reduction effect of the muffler assembly 2.

[0042] Further, the connecting mechanism 4 is arranged to make the connection between the fan housing 13 and the muffler housing 22 more convenient, helping to reduce the complexity and time cost during installation, and allowing users to quickly install or disassemble the fan housing 13 and the muffler housing 22.

[0043] As shown in Figures 1 to 8 The connecting mechanism 4 includes a first flange plate 41 on the fan housing 13 and communicating with the fan air outlet 15, a second flange plate 42 on the muffler housing 22 and communicating with the muffler air inlet 23, and a mounting bracket 43 communicating with the fan air outlet 15 and the muffler air inlet 23, respectively, and the mounting bracket 43 is threadedly connected with the first flange plate 41 and the second flange plate 42, respectively;

[0044] Specifically, the first flange plate 41 is welded to the fan housing 13 and communicates with the fan air outlet 15, the second flange plate 42 is welded to the muffler housing 22 and communicates with the two muffler air inlets 23, respectively, and the mounting bracket 43 is welded to the auxiliary frame of the sweeper truck and is threadedly connected with the first flange plate 41 and the second flange plate 42, respectively, so that the two fan housings 13 are connected with the muffler housing 22 through the mounting bracket 43.

[0045] Further, the flange plate is an important component commonly used in pipeline and equipment connection, and through the eyelet and bolt thereon, a tight connection can be achieved, the first flange plate 41 and the second flange plate 42 are welded to the fan housing 13 and the muffler housing 22, respectively, and through the threaded connection of the mounting bracket 43, the firm connection between the two is ensured; secondly, the flange plate connection has good sealing performance, without additional accessories, the assembly and maintenance convenience of the surrounding holes can be ensured, helping to prevent gas or noise leakage, and effectively improving the overall performance of the system.

[0046] Optionally, the second flange plate 42 has a rectangular cross section and four rounded corners.

[0047] As shown in Figures 1 to 8The silencer housing 22 shown is provided with a third flange 44 that communicates with the silencer outlet 24, and the flow guide housing 32 is provided with a fourth flange 45 that communicates with the flow guide inlet 33 and is threadedly connected to the third flange 44.

[0048] Specifically, the third flange 44 is welded to the silencer housing 22 and communicates with the silencer outlet 24, and the fourth flange 45 is welded to the guide housing 32 and communicates with the guide inlet 33. The third flange 44 and the fourth flange 45 are threaded together, which helps to ensure that the airflow smoothly enters the guide inlet 33 from the silencer outlet 24. In addition, while ensuring a tight connection between the silencer outlet 24 and the guide inlet 33, the user can easily install and disassemble the silencer housing 22 and the guide housing 32.

[0049] Furthermore, the connection between the flow guide housing 32 and the muffler housing 22 is tangentially arranged. This tangential arrangement can reduce the abrupt changes and resistance of the airflow when it enters the flow guide housing 32, and the smooth transition makes the airflow from the muffler housing 22 to the flow guide housing 32 more smooth. This helps to reduce the generation of turbulence and eddies, thereby improving the overall efficiency and noise reduction effect of the system.

[0050] like Figures 1 to 8 The motor 12 shown is provided with a shock absorption mechanism 5. The shock absorption mechanism 5 includes a fixed bracket 51 fixedly installed on the sweeper, a connecting bracket 52 detachably connected to the motor 12, and a rubber block 53 located between the fixed bracket 51 and the connecting bracket 52.

[0051] Specifically, the fixed bracket 51 is welded to the non-moving parts of the sweeper, the connecting bracket 52 is threaded to the two motors 12 respectively, and the number of rubber blocks 53 is two, corresponding to the two motors 12 respectively.

[0052] Optionally, in some embodiments, the fixing bracket 51 and the connecting bracket 52 are snapped together, thereby fixing the two rubber blocks 53 between the fixing bracket 51 and the connecting bracket 52.

[0053] Optionally, in some embodiments, the two rubber blocks 53 are respectively connected to the slots of the fixing bracket 51 and the connecting bracket 52.

[0054] Optionally, in some embodiments, the two rubber blocks 53 are respectively locked to the fixed bracket 51 and the connecting bracket 52.

[0055] Furthermore, as a preferred embodiment of the present invention and not a limitation thereof, both rubber blocks 53 are provided with threaded portions on both the upper and lower sides along the vertical direction. Both rubber blocks 53 are simultaneously threaded to the fixed bracket 51 through the upper threaded portion, and both rubber blocks 53 are simultaneously threaded to the connecting bracket 52 through the lower threaded portion.

[0056] Furthermore, the rubber block 53, as a shock-absorbing material, has good elasticity and vibration absorption capacity. The rubber block 53 can absorb the vibration and impact generated during the operation of the motor 12, which helps to reduce the transmission of these vibrations to other parts of the sweeper, thereby reducing the vibration and noise of the entire system.

[0057] Optionally, the connecting bracket 52 is provided with several elongated holes and set bolt holes so that the user can adjust the gap between the connecting bracket 52 and the motor 12 according to actual needs.

[0058] like Figures 1 to 8 The noise reduction assembly 2 shown also includes a noise reduction plate 25 and a mesh plate 26 located inside the muffler housing 22. Both the noise reduction plate 25 and the mesh plate 26 are arranged along the extending direction of the noise reduction channel 21.

[0059] Specifically, the noise reduction plate 25 is arranged around the inner wall of the muffler housing 22 and along the extension direction of the muffler channel 21, and the mesh plate 26 is arranged around the noise reduction plate 25 on the side away from the inner wall of the muffler housing 22.

[0060] Furthermore, the layered arrangement of the noise reduction plate 25 and the perforated plate 26 can form multiple noise reduction barriers. When noise passes through the noise reduction channel 21, it will be blocked and reflected by the perforated plate 26 and the noise reduction plate 25 in turn, thereby effectively reducing the noise intensity.

[0061] Optionally, in some embodiments, the noise reduction panel 25 is a sound insulation felt made of high-density material, which has a good sound insulation effect on sound waves and low-frequency noise propagating in the air.

[0062] Optionally, in some embodiments, the noise reduction plate 25 is sound-absorbing cotton, which has good sound absorption properties and can effectively reduce noise.

[0063] Optionally, in some embodiments, the noise reduction board 25 is a mineral wool board, which is made of mineral wool fibers mixed with cement. The internal fibrous structure can effectively absorb sound waves and reduce the propagation of noise.

[0064] like Figures 1 to 8 The flow guide housing 32 shown includes an upper plate 321 and a groove plate 322, which are inclinedly connected to form an included angle α, where 15°≤ included angle α≤45°;

[0065] Furthermore, the upper plate 321 and the groove plate 322 enclose and form a flow guide channel 31. The inclined upper plate 321 and the groove plate 322 can form a certain guiding effect, so that the gas flows in the flow guide channel 31 in a predetermined direction, which helps to reduce the turbulence and eddies of the gas inside the flow guide shell 32, and is beneficial to improving the flow efficiency and stability of the gas.

[0066] Optionally, in some embodiments, the included angle α is 15°. A 15° included angle helps to guide the airflow more smoothly, reduce the formation of turbulence and eddies, and thus reduce noise.

[0067] Optionally, in some embodiments, the included angle α is 45°. A 45° included angle can more actively guide the airflow, which is suitable for high-speed airflow or occasions where rapid exhaust is required.

[0068] Furthermore, as a preferred embodiment of this utility model and not a limitation thereof, the included angle α is 20°. The included angle of 20° provides a better balance between guiding airflow and smoothness, which can provide better noise reduction effect while facilitating the smooth guidance of airflow to the external environment.

[0069] Furthermore, the flow guide housing 32 also includes a frame edge 323, which is connected to both the upper plate 321 and the slot plate 322, and is connected to the flow guide outlet 34. The frame edge 323 is provided so that the flow guide housing 32 forms a robust frame structure, thereby strengthening the strength of the flow guide outlet 34.

[0070] Preferably, the upper plate 321, the groove plate 322, and the frame edge 323 are welded together as one piece.

[0071] Furthermore, the air outlet 34 faces the rear axle of the sweeper and is open and unobstructed, so that the airflow through the air guide channel 31 can be smoothly discharged into the outside atmosphere, avoiding the airflow impacting the sweeper's parts, thereby effectively reducing noise generation.

[0072] like Figures 1 to 8 The flow guide housing 32 shown is provided with a shock-absorbing mechanism 6. The shock-absorbing mechanism 6 includes a first shock-absorbing bracket 61 located on the flow guide housing 32, a second shock-absorbing bracket 62 connected to the first shock-absorbing bracket 61, and a shock-absorbing block 63 located between the first shock-absorbing bracket 61 and the second shock-absorbing bracket 62.

[0073] Furthermore, the anti-vibration block 63 can effectively absorb and attenuate the vibration of the flow guide shell 32, which helps to reduce the impact of vibration on the flow guide shell 32, improve the stability of the flow guide shell 32, and extend the service life of the flow guide shell 32.

[0074] Specifically, there are two shock-absorbing mechanisms 6, which are symmetrically arranged on both sides of the flow guide shell 32. The first shock-absorbing bracket 61 is set on the outer wall of the flow guide shell 32. The shock-absorbing block 63 includes the first shock-absorbing block 631 and the second shock-absorbing block 632. A pad is also provided above the first shock-absorbing block 631. The pad, the first shock-absorbing block 631, the first shock-absorbing bracket 61, the second shock-absorbing block 632 and the second shock-absorbing bracket 62 are sequentially fastened together by bolts and nuts through holes.

[0075] Further, the two shockproof mechanisms 6 are symmetrically arranged on both sides of the flow guide shell 32, which can ensure that the forces on both sides of the flow guide shell 32 are balanced when the flow guide shell 32 is subjected to vibration, thereby avoiding deformation or damage of the flow guide shell 32 caused by uneven force; secondly, through the sequential fastening connection of the base plate, the first shockproof block 631, the first shockproof support 61, the second shockproof block 632, and the second shockproof support 62, a multi-level shockproof structure is formed, which effectively absorbs and disperses vibration energy, further improving the shockproof effect.

[0076] Optionally, in some embodiments, the shockproof block 63 is made of foamed plastic material. The foamed plastic material can reduce vibration while having good sound absorption performance.

[0077] Optionally, in some embodiments, the shockproof block 63 is made of silica gel material. The shockproof block 63 made of silica gel material can provide excellent shock absorption effect.

[0078] Optionally, in some embodiments, the shockproof block 63 is made of rubber material. The rubber material has excellent elasticity and can effectively absorb and disperse vibration energy.

[0079] The implementation of Embodiment 1 is as follows:

[0080] A washing and sweeping vehicle fan silencing air duct and flow guide device, comprising a fan assembly 1, a silencing assembly 2, and a flow guide assembly 3, the fan assembly 1 comprising a fan 11, a motor 12, and a fan housing 13 for mounting the fan 11 and the motor 12, the fan housing 13 being provided with a fan air outlet passage 14 extending towards the silencing assembly 2, the silencing assembly 2 comprising a silencing passage 21, and the flow guide assembly 3 comprising a flow guide passage 31, the fan air outlet passage 14, the silencing passage 21, and the flow guide passage 31 being sequentially connected and communicated, and the cross sections thereof being sequentially increased, when the high-speed airflow generated by the rotation of the fan 11 driven by the motor 12 sequentially passes through the fan air outlet passage 14, the silencing passage 21, and the flow guide passage 31, the speed of the airflow gradually decreases, and the sequentially increased cross sections can reduce the speed of the airflow, which is conducive to reducing the noise caused by high-speed airflow, effectively solving the problem that in the existing washing and sweeping vehicle, the high-speed airflow generated by the motor driving the fan to suck the dust and garbage on the road is directly discharged into the external atmosphere, resulting in a large noise of the whole vehicle.

[0081] The motor 12 is provided with a damping mechanism 5, the damping mechanism 5 comprises a fixed support 51, a connecting support 52 and rubber blocks 53 between the fixed support 51 and the connecting support 52, the fixed support 51 is welded on the non-moving part of the washing and sweeping vehicle, the connecting support 52 is respectively screwed with two motors 12, the number of rubber blocks 53 is two corresponding to two motors 12, the two rubber blocks 53 are respectively provided with threaded parts on the upper and lower sides in the vertical direction, the two rubber blocks 53 are screwed with the fixed support 51 through the upper threaded parts, the two rubber blocks 53 are screwed with the connecting support 52 through the lower threaded parts, the rubber blocks 53 are damping materials, have good elasticity and vibration absorption capacity, can absorb the vibration and impact generated in the operation of the motor 12, are beneficial to reduce the transmission of the vibration to other parts of the washing and sweeping vehicle, thereby reducing the vibration and noise of the whole system.

[0082] The silencing assembly 2 comprises a silencer housing 22, a noise reduction plate 25 and a mesh plate 26 in the silencer housing 22, the noise reduction plate 25 is arranged around the inner wall of the silencer housing 22 and extends along the extension direction of the silencing channel 21, and the mesh plate 26 is arranged around the side of the noise reduction plate 25 away from the inner wall of the silencer housing 22, the layered arrangement of the noise reduction plate 25 and the mesh plate 26 can form multiple noise reduction barriers, and when the noise passes through the silencing channel 21, the noise will be hindered and reflected by the mesh plate 26 and the noise reduction plate 25 in turn, thereby effectively reducing the noise intensity.

[0083] The flow guide assembly 3 comprises a flow guide housing 32, the flow guide housing 32 comprises an upper plate 321 and a groove plate 322, the upper plate 321 and the groove plate 322 form a flow guide channel 31, the upper plate 321 and the groove plate 322 are connected at an angle α, the angle α is 20°, the angle of 20° provides a better balance between guiding airflow and smoothness, can provide better noise reduction effect while being beneficial to smoothly guide the airflow to be discharged to the external environment.

[0084] The shockproof mechanism 6 is arranged on the flow guide shell 32, the number of the shockproof mechanism 6 is two and the shockproof mechanism 6 is symmetrically arranged on two sides of the flow guide shell 32, the first shockproof support 61 is arranged on the outer side wall of the flow guide shell 32, the shockproof block 63 comprises a first shockproof block 631 and a second shockproof block 632, a pad is further arranged above the first shockproof block 631, the pad, the first shockproof block 631, the first shockproof support 61, the second shockproof block 632 and the second shockproof support 62 are sequentially fastened and connected by means of bolt and nut through holes, the two shockproof mechanisms 6 are symmetrically arranged on two outer side walls of the flow guide shell 32, the force received by the flow guide shell 32 on both sides can be ensured to be balanced when the flow guide shell 32 is vibrated, so that deformation or damage of the flow guide shell 32 caused by uneven force is avoided, further, the pad, the first shockproof block 631, the first shockproof support 61, the second shockproof block 632 and the second shockproof support 62 are sequentially fastened and connected, a multilayer shockproof structure is formed, vibration energy is effectively absorbed and dispersed, and the effect of shock absorption and noise reduction is further improved.

[0085] The implementation of example 2 is as follows:

[0086] The difference between example 2 and example 1 is that the upper plate 321 and the groove plate 322 are inclinedly connected to form an included angle α, and the included angle α is 15°, the included angle of 15° helps to more smoothly guide the airflow, reduces the formation of turbulent flow and vortex, and thus reduces the noise.

[0087] The implementation of example 3 is as follows:

[0088] The difference between example 3 and example 1 is that the upper plate 321 and the groove plate 322 are inclinedly connected to form an included angle α, and the included angle α is 45°, the included angle of 45° can more actively guide the airflow, and is suitable for high-speed airflow or occasions requiring rapid exhaust.

[0089] The above only further illustrates the technical content of the utility model by means of examples, so as to make the reader more easily understand, but does not represent that the implementation mode of the utility model is limited to this, any technical extension or re-creation made according to the utility model is protected by the utility model. The protection scope of the utility model is subject to the claims.

Claims

1. A kind of sweeper truck fan silencer air duct and flow guide device, including fan assembly (1), silencer assembly (2) and flow guide assembly (3), it is characterized by: The fan assembly (1) comprises a fan (11), a motor (12) for driving the fan (11) to operate, and a fan shell (13) for mounting the fan (11) and the motor (12), the fan shell (13) is provided with a fan air outlet channel (14) extending towards the silencing assembly (2), the silencing assembly (2) comprises a silencing channel (21) communicating with the fan air outlet channel (14), the flow guide assembly (3) comprises a flow guide channel (31) communicating with the silencing channel (21), and the cross sections of the fan air outlet channel (14), the silencing channel (21) and the flow guide channel (31) increase in turn.

2. A kind to be washed according to claim 1 The fan silencer wind channel and the flow guide device of sweeper, with the characteristics that: The fan shell (13) is provided with a fan air outlet (15) communicating with the fan air outlet channel (14), the silencing assembly (2) comprises a silencer shell (22), the silencer shell (22) is provided with a silencer air inlet (23) corresponding to the fan air outlet (15), and a silencer air outlet (24), the silencing channel (21) respectively communicates with the silencer air inlet (23) and the silencer air outlet (24), and the cross section of the silencing channel (21) increases from the silencer air inlet (23) to the silencer air outlet (24).

3. A fan silencer air duct and flow guide device for a washing and sweeping vehicle according to claim 2, characterized in that: The flow guide assembly (3) comprises a flow guide shell (32), the flow guide shell (32) is provided with a flow guide air inlet (33) communicating with the silencer air outlet (24), and a flow guide air outlet (34), the flow guide channel (31) respectively communicates with the flow guide air inlet (33) and the flow guide air outlet (34), and the cross section of the flow guide channel (31) increases from the flow guide air inlet (33) to the flow guide air outlet (34).

4. A fan silencer air duct and flow guide device for a washing and sweeping vehicle according to claim 2, characterized in that: The fan shell (13) and the silencer shell (22) are provided with a connecting mechanism (4), and the fan shell (13) is connected with the silencer shell (22) through the connecting mechanism (4).

5. A fan silencer air duct and flow guiding device for a washing and sweeping vehicle according to claim 4, characterized in that: The connecting mechanism (4) comprises a first flange (41) located on the fan shell (13) and communicating with the fan air outlet (15), a second flange (42) located on the silencer shell (22) and communicating with the silencer air inlet (23), and a mounting bracket (43) respectively communicating with the fan air outlet (15) and the silencer air inlet (23), and the mounting bracket (43) is threadedly connected with the first flange (41) and the second flange (42) respectively.

6. A fan silencer air duct and flow guiding device for a washing and sweeping vehicle according to claim 3, characterized in that: The silencer shell (22) is provided with a third flange (44) communicating with the silencer air outlet (24), and the flow guide shell (32) is provided with a fourth flange (45) communicating with the flow guide air inlet (33) and threadedly connected with the third flange (44).

7. A fan silencer air duct and flow guiding device for a washing and sweeping vehicle according to claim 1, characterized in that: The motor (12) is provided with a damping mechanism (5), the damping mechanism (5) comprises a fixed support (51) fixedly arranged on the washing and sweeping vehicle, a connecting support (52) detachably connected with the motor (12), and a rubber block (53) located between the fixed support (51) and the connecting support (52).

8. A fan silencer air duct and flow guiding device for a washing and sweeping vehicle according to claim 2, characterized in that: The sound attenuation assembly (2) further comprises a noise reduction plate (25) and a mesh plate (26) arranged in the sound attenuation housing (22), and the noise reduction plate (25) and the mesh plate (26) are arranged along the extending direction of the sound attenuation channel (21).

9. A fan silencer air duct and flow guiding device for a washing and sweeping vehicle according to claim 3, characterized in that: The flow guide housing (32) comprises an upper plate (321) and a groove plate (322), and the upper plate (321) and the groove plate (322) are connected in an inclined manner to form an included angle a, and 15°≤ the included angle a ≤ 45°.

10. A fan silencer air duct and flow guiding device for a washing and sweeping vehicle according to claim 3, characterized in that: The flow guide housing (32) is provided with a shockproof mechanism (6), the shockproof mechanism (6) comprises a first shockproof support (61) arranged on the flow guide housing (32), a second shockproof support (62) connected with the first shockproof support (61), and a shockproof block (63) arranged between the first shockproof support (61) and the second shockproof support (62).

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