Drum-shaped coupling double-fan power transmission mechanism and high-speed motor sweeper

Abstract

The utility model provides a drum-shaped coupler double-fan power transmission mechanism and a high-speed motor sweeper, and relates to the technical field of environmental sanitation vehicles, the drum-shaped coupler double-fan power transmission mechanism comprises an auxiliary engine and two sets of negative pressure fan assemblies arranged side by side, and transmission shafts in the two negative pressure fan assemblies are located on the same axis. The two transmission shafts are in transmission connection through a drum-shaped coupler, and an output shaft of the auxiliary engine is in transmission connection with the transmission shaft in one negative pressure fan assembly through a belt transmission assembly. In the design, the auxiliary engine serves as a core driving source to drive one negative pressure fan assembly to rotate at a high speed, and negative pressure suction force is established; synchronous collaborative operation of the two groups of fans is realized through transmission of the drum-shaped coupler; negative pressure suction force generated by the two sets of draught fans acts in the garbage can in an overlapped mode, the negative pressure strength in the garbage can is remarkably improved, stable and strong suction force can be kept even under the full-load working condition, and the large-size garbage suction problem is effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of sanitation vehicle technology, and in particular to a drum-shaped coupling dual-fan power transmission mechanism and a high-speed sweeper. Background Technology

[0002] Currently, traditional sweepers generally use a single negative pressure system for garbage collection. This system uses a single engine to drive a single fan, generating negative pressure to suck garbage from the ground into the garbage bin. However, this operating mode has significant technical bottlenecks: when the garbage bin approaches its maximum capacity, the single fan needs to maintain high-load operation to ensure suction power, but due to limitations in engine power and fan performance, insufficient power output is prone to occur. Once the fan power cannot meet the demand, the negative pressure suction will drop significantly, making it difficult to effectively pick up large pieces of garbage, seriously affecting sweeping efficiency and operational effectiveness. Utility Model Content

[0003] This utility model aims to at least partially solve one of the technical problems in related technologies. To this end, this utility model proposes a drum-shaped coupling dual-fan power transmission mechanism and a high-speed sweeper.

[0004] The technical solution to the technical problem solved by this utility model is as follows:

[0005] This utility model proposes a drum-shaped coupling dual-fan power transmission mechanism, including an auxiliary engine; two sets of negative pressure fan assemblies arranged side by side, the transmission shafts in the two negative pressure fan assemblies are on the same axis, the two transmission shafts are connected by a drum-shaped coupling, and the output shaft of the auxiliary engine is connected to the transmission shaft in one of the negative pressure fan assemblies by a belt transmission assembly.

[0006] Preferably, the negative pressure fan assembly includes an outer casing, with a suction port at the top and an exhaust port at the bottom; rotatable fan blades are connected inside the outer casing via a drive shaft.

[0007] Preferably, the drum-shaped coupling includes an inner sleeve, which is respectively fitted onto the two drive shafts. An outer gear ring is fixed on the outer wall of the inner sleeve. An outer sleeve is fitted around the inner sleeve, and an inner gear ring that can mesh with the outer gear ring is provided inside the outer sleeve. A flange is fixed on the opposite side of the two outer sleeves, and the two flanges are connected by bolts.

[0008] Preferably, a first pulley is connected to the output shaft of the auxiliary engine, and a second pulley is connected to the drive shaft of one of the negative pressure fan components after passing through the outer casing. A drive belt is provided on both the first and second pulleys. A tensioning unit is provided on the drive belt.

[0009] Preferably, the tensioning unit includes a support rod, a vertical plate fixed above the support rod, a horizontal plate fixed at the bottom of the vertical plate, a slidable base plate on the side wall of the vertical plate, a tensioning wheel detachably connected to the base plate to abut against the transmission belt, and a bottom plate parallel to the horizontal plate connected below the base plate; it also includes a positioning screw, which can freely pass through the base plate and the horizontal plate, and is adapted to be connected to several sets of adjusting nuts, which are located on the upper and lower sides of the horizontal plate and the bottom plate respectively, to realize the positioning and adjustment of the base plate.

[0010] Preferably, ear plates are fixed on both sides of the base plate, and placement grooves are opened on the ear plates. Studs are fixed on the rotating shafts on both sides of the tension wheel. The studs are appropriately arranged in the placement grooves, and the tension wheel is positioned between the two ear plates by the limiting nut connected by the two studs.

[0011] Preferably, the suction port has a stepped opening above it, and an outer frame is connected to the stepped opening. A filter element is disposed inside the outer frame, and the filter element has a downwardly concave frustum-shaped structure.

[0012] Preferably, the suction port has several sets of slots, the inner walls of the slots on both sides are provided with rectangular slots, and the bottom of the slots are connected to a circular slot; it also includes several sets of rotating rods, the rotating rods can rotatably pass through the outer frame, and rectangular blocks are fixed on both sides of the bottom of the rotating rods respectively. The bottom of the rectangular blocks can be adapted to pass through the rectangular slots and placed in the circular slots. Twisting the rotating rods makes the rectangular blocks and the rectangular slots misaligned, which is used to prevent the rotating rods and the outer frame from moving upward.

[0013] This utility model also proposes a high-speed sweeper, including any of the above-mentioned drum-shaped coupling dual-fan power transmission mechanisms.

[0014] The above technical solution has the following advantages or beneficial effects:

[0015] 1. In this utility model, an auxiliary engine is used as the core driving source to drive one set of negative pressure fan components to operate at high speed and establish negative pressure suction. At the same time, the power is efficiently transmitted to another set of negative pressure fan components installed in parallel through a drum-shaped coupling, so as to realize the synchronous and coordinated operation of the two sets of fans. The negative pressure suction generated by the two sets of fans acts superimposed on the garbage bin, which significantly improves the negative pressure intensity inside the garbage bin. Even under full load conditions, it can maintain a stable and strong suction, effectively solving the problem of large-volume garbage collection.

[0016] 2. In this invention, the auxiliary engine is connected to one of the negative pressure fan assemblies via a belt drive assembly. An adjustable tension pulley is provided below the drive belt of the belt drive assembly; by adjusting the position of this tension pulley, the drive belt can be made to achieve optimal tension.

[0017] 3. In this utility model, a filter element is provided inside the suction port of the negative pressure fan assembly. The filter element is used to filter odors from the garbage can and debris from the outside. The filter element has a downwardly concave truncated pyramidal structure, which can effectively delay the clogging cycle and avoid the overall suction efficiency from decreasing due to local dust accumulation. Furthermore, the filter element is fixed above the suction port by a quick-release structure. This structure can improve the efficiency of single disassembly and assembly, and facilitate the disassembly, cleaning or replacement of the filter element. Attached Figure Description

[0018] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0019] Figure 1 A three-dimensional structural diagram of a drum-shaped coupling dual-fan power transmission mechanism;

[0020] Figure 2 for Figure 1 Enlarged view of section A;

[0021] Figure 3 This is a three-dimensional structural diagram of two sets of negative pressure fan components;

[0022] Figure 4 for Figure 3 Enlarged view of section B;

[0023] Figure 5 A three-dimensional structural diagram showing two sets of negative pressure fan assemblies connected by a drum-shaped coupling;

[0024] Figure 6 This is a 3D view of a dual-fan power transmission mechanism with a drum-shaped coupling in a high-speed sweeper.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Auxiliary engine;

[0027] 2. Drum-shaped coupling; 21. Inner sleeve; 22. External gear ring; 23. Outer sleeve; 24. Flange;

[0028] 3. Negative pressure fan assembly; 31. Outer casing; 32. Drive shaft; 33. Suction port; 34. Exhaust port; 35. Stepped port; 36. Outer frame; 37. Filter element; 38. Groove; 39. Rectangular groove; 310. Circular groove; 311. Rotating rod; 312. Rectangular block;

[0029] 4. Belt drive assembly; 41. First pulley; 42. Second pulley; 43. Drive belt;

[0030] 5. Tensioning unit; 51. Support rod; 52. Vertical plate; 53. Horizontal plate; 54. Base plate; 55. Bottom plate; 56. Tensioning wheel; 57. Positioning screw; 58. Adjusting nut; 59. Ear plate; 510. Placement slot; 511. Limiting nut. Detailed Implementation

[0031] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0032] It should be noted that in the description of this utility model, the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0033] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] like Figures 1 to 5 As shown, this embodiment proposes a dual-fan power transmission mechanism with a drum-shaped coupling 2, which includes an engine 1 and two negative pressure fan assemblies 3 arranged side by side. The two sets of transmission shafts 32 in the negative pressure fan assembly 3 are on the same axis and are connected by a drum-shaped coupling 2. The output shaft in the auxiliary engine 1 is connected to the transmission shaft 32 in one of the negative pressure fan assemblies 3 by a belt transmission assembly 4.

[0035] Market research shows that traditional sweepers generally use a single negative pressure system to perform garbage collection. When the garbage bin is close to its maximum capacity, the power of a single fan is insufficient to meet the needs of full-load operation, which easily leads to insufficient power output. This results in a significant decrease in negative pressure suction, making it difficult to effectively collect larger garbage and seriously affecting cleaning efficiency and work results.

[0036] To address the aforementioned issues, the R&D team innovatively designed a dual-fan power transmission mechanism using a drum-shaped coupling 2. This mechanism uses an auxiliary engine 1 as the core drive source, directly driving one set of negative pressure fan components 3 to operate at high speed, quickly establishing negative pressure suction. Simultaneously, the power is efficiently transmitted through the drum-shaped coupling 2 to another set of negative pressure fan components 3 installed in parallel, achieving synchronous and coordinated operation of the two sets of fans. The negative pressure suction generated by the two sets of fans acts superimposed on the garbage bin, significantly increasing the negative pressure intensity inside the bin. Even under full load conditions, it can maintain stable and strong suction, effectively solving the problem of large-volume garbage collection.

[0037] This solution deeply optimizes the negative pressure fan assembly 3. The negative pressure fan assembly 3 adopts a volute-type outer casing 31, with a suction port 33 at the top and an exhaust port 34 at the bottom. Placing the suction port 33 at the top allows direct connection to the top of the garbage bin, transmitting negative pressure suction into the bin through pipes to form a top-down suction flow field, significantly improving garbage suction efficiency. Inside the outer casing 31 is a rotatable fan blade connected to a drive shaft 32, achieving high-speed rotation under the drive of the auxiliary motor 1.

[0038] Furthermore, the fan blades adopt a backward-curved airfoil structure. When the fan blades rotate at high speed, the curved surface of the blades pushes the air to accelerate along the tangential direction. Under the action of centrifugal force, the air is thrown towards the side wall of the volute and discharged from the exhaust port 34. At the same time, the airflow inside the garbage bin rushes into the interior of the outer shell 31 from the air intake port under the action of pressure difference, thus forming a negative pressure suction inside the garbage bin.

[0039] In this embodiment, reference Figure 5 The drum-shaped coupling 2 includes an inner sleeve 21, which is respectively fitted onto two drive shafts 32. A limit key is fixed on each drive shaft 32. A keyway is formed inside the inner sleeve 21, and the limit key is inserted into the keyway to facilitate torque transmission between the drive shaft 32 and the inner sleeve 21. An outer gear ring 22 is fixed to the outer wall of the inner sleeve 21, and an outer sleeve 23 is fitted around the inner sleeve 21. An inner gear ring that meshes with the outer gear ring 22 is located inside the outer sleeve 23. When the inner gear ring meshes with the outer gear ring 22, a torque transmission path is formed between the outer sleeve 23 and the inner sleeve 21. Flanges 24 are fixed to opposite sides of the two outer sleeves 23. The two flanges 24 are then connected and fixed by bolts. To ensure the reliability of the drum-shaped coupling 2 under complex operating conditions, the overall structure employs sealing measures to isolate external impurities and maintain an internal lubrication environment.

[0040] refer to Figure 1In this embodiment, the output shaft of the auxiliary engine 1 is connected to a first pulley 41, and the drive shaft 32 of a set of negative pressure fan components 3 passes through the outer casing 31 and is connected to a second pulley 42. The first pulley 41 and the second pulley 42 are jointly provided with a drive belt 43 assembly, and a tensioning unit 5 is provided on the drive belt 43 to tension the drive belt 43.

[0041] Further reference Figure 2 The tensioning unit 5 includes a support rod 51, a vertical plate 52 fixed above the support rod 51, and a horizontal plate 53 perpendicular to the vertical plate 52 fixed at the bottom of the vertical plate 52. A slidable base plate 54 is provided on the side wall of the vertical plate 52. A tensioning wheel 56, which abuts against the transmission belt 43, is detachably connected to the base plate 54. A base plate 55 parallel to the horizontal plate 53 is connected below the base plate 54. The unit also includes a positioning screw 57, which can freely pass through holes in the base plate 54 and the horizontal plate 53, and is fitted with several sets of adjusting nuts 58. These adjusting nuts 58 are located on the upper and lower sides of the horizontal plate 53 and the base plate 55, respectively. By clamping the base plate 54 and the horizontal plate 53 with two adjusting nuts 58, the base plate 54 can be positioned. By adjusting the distance between the adjusting nuts 58, the relative position of the base plate 55 and the horizontal plate 53 can be changed, thereby adjusting the position of the tensioning wheel 56 and achieving optimal tension for the transmission belt 43.

[0042] In this embodiment, ear plates 59 are fixed on both sides of the base plate 54. Placement grooves 510 are provided on the ear plates 59. Studs are fixed to the rotating shafts on both sides of the tension wheel 56, and these studs are appropriately placed within the placement grooves 510. Both sides are secured by two sets of limiting nuts 511. Specifically, the two limiting nuts 511 are located on both sides of the ear plates 59. Tightening the limiting nuts 511 clamps and fixes the ear plates 59, thereby achieving axial positioning of the rotating shafts and mounting the tension wheel 56 onto the base plate 54. In this design, the tension wheel 56 achieves a quick-release function through the studs and limiting nuts 511, facilitating periodic inspection of the wear condition of the transmission belt 43 or cleaning of debris from the pulley grooves. When the tension wheel 56 itself experiences wear, bearing jamming, or other problems, it can be directly disassembled and replaced with a new component.

[0043] In this embodiment, a stepped opening 35 is located above the suction port 33 at the top of the outer casing 31. An outer frame 36 is connected to the stepped opening 35, and a filter element 37 is disposed inside the outer frame 36. The filter element 37 is used to filter odors and external dust and other debris from the trash can. Specifically, the filter element 37 is composed of a multi-layer composite filter material structure: the upper layer is a pre-filter layer made of polypropylene (PP) fiber meltblown cloth, which can intercept pollutants such as hair and large dust particles; the middle layer is an activated carbon adsorption layer, which uses honeycomb high-iodine value activated carbon, which efficiently adsorbs odor molecules and some harmful gases from inside the trash can through its rich pore structure; the bottom layer is a HEPA high-efficiency filter layer, which can effectively filter PM, bacteria, and allergens. This design filters odors from the trash can and external debris.

[0044] Furthermore, the filter element 37 has a downward-concave frustum-shaped structure. When the bottom of the filter element 37 is clogged with dust and debris, the sloping side can still maintain an airflow channel. This design can effectively delay the clogging cycle of the filter element 37, avoid the decrease in overall suction efficiency caused by local dust accumulation, and reduce the frequency of maintenance.

[0045] Further reference Figures 4 to 5 The design includes several sets of slots 38 on the suction port 33, with rectangular grooves 39 on the inner walls of both sides of each slot 38, and a circular groove 310 connected to the bottom of each slot 38. It also includes several sets of rotating rods 311, which can be rotated through the outer frame 36 via bearings and protrude from the bottom of the frame. Rectangular blocks 312 are fixed to both sides of the bottom of each rotating rod 311. The bottom of each rectangular block 312 can be fitted through the rectangular groove 39 and placed within the circular groove 310. Twisting the rotating rod 311 causes the rectangular blocks 312 to misalign with the rectangular groove 39, preventing the rotating rod 311 and the outer frame 36 from moving upwards. In this design, the filter element 37 can be disassembled and assembled with a simple action of "inserting the rectangular block 312 - rotating the rotating rod 311 - locking," without the need for other tools, thus improving the efficiency of a single disassembly and assembly, and facilitating the disassembly, cleaning, or replacement of the filter element 37.

[0046] In addition to the aforementioned drum-shaped coupling 2 dual-fan power transmission mechanism, this utility model also provides a high-speed sweeper including the one disclosed in the above embodiments. Other parts of the high-speed sweeper can be referred to the prior art, and will not be described in detail here.

[0047] Although the specific embodiments of the utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the utility model. Based on the technical solution of the utility model, various modifications or variations that can be made by those skilled in the art without creative effort are still within the scope of protection of the utility model.

Claims

1. A drum-shaped coupling dual-fan power transmission mechanism, characterized in that, include: Auxiliary engine (1); Two sets of negative pressure fan assemblies (3) are arranged side by side. The drive shafts (32) in the two negative pressure fan assemblies (3) are on the same axis. The two drive shafts (32) are connected by a drum coupling (2). The output shaft of the auxiliary engine (1) is connected to the drive shaft (32) in one of the negative pressure fan assemblies (3) by a belt drive assembly (4).

2. The drum-shaped coupling dual-fan power transmission mechanism according to claim 1, characterized in that, The negative pressure fan assembly (3) includes an outer shell (31), with a suction port (33) at the top and an exhaust port (34) at the bottom; a rotatable fan blade is connected inside the outer shell (31) via a drive shaft (32).

3. The drum-shaped coupling dual-fan power transmission mechanism according to claim 1, characterized in that, The drum-shaped coupling (2) includes an inner sleeve (21), which is respectively fitted onto the two drive shafts (32). An outer gear ring (22) is fixed on the outer wall of the inner sleeve (21). An outer sleeve (23) is fitted on the outside of the inner sleeve (21). An inner gear ring that can mesh with the outer gear ring (22) is provided inside the outer sleeve (23). A flange (24) is fixed on the opposite side of the two outer sleeves (23). The two flanges (24) are connected by bolts.

4. The drum-shaped coupling dual-fan power transmission mechanism according to claim 2, characterized in that, The output shaft of the auxiliary engine (1) is connected to a first pulley (41). The drive shaft (32) of one of the negative pressure fan components (3) passes through the outer shell (31) and is connected to a second pulley (42). A drive belt (43) is provided on both the first pulley (41) and the second pulley (42). A tensioning unit (5) is provided on the drive belt (43).

5. The drum-shaped coupling dual-fan power transmission mechanism according to claim 4, characterized in that, The tensioning unit (5) includes a support rod (51), a vertical plate (52) fixed above the support rod (51), a horizontal plate (53) fixed at the bottom of the vertical plate (52), a slidable base plate (54) provided on the side wall of the vertical plate (52), a tensioning wheel (56) detachably connected to the base plate (54) and abutting against the transmission belt (43), and a bottom plate (55) parallel to the horizontal plate (53) connected below the base plate (54); it also includes a positioning screw (57), which can freely pass through the base plate (54) and the horizontal plate (53), and is adapted to be connected to several sets of adjusting nuts (58), which are located on the upper and lower sides of the horizontal plate (53) and the bottom plate (55) respectively, so as to realize the positioning and adjustment of the base plate (54).

6. The drum-shaped coupling dual-fan power transmission mechanism according to claim 5, characterized in that, The base plate (54) is fixed with ear plates (59) on both sides. The ear plates (59) are provided with placement grooves (510). The tension wheel (56) is fixed with studs on the rotating shafts on both sides. The studs are appropriately arranged in the placement grooves (510), and the tension wheel (56) is positioned between the two ear plates (59) by the limiting nut (511) connected by the two studs.

7. The drum-shaped coupling dual-fan power transmission mechanism according to claim 2, characterized in that, The suction port (33) has a stepped opening (35) above it, and an outer frame (36) is connected to the stepped opening (35). A filter element (37) is provided inside the outer frame (36), and the filter element (37) has a downwardly concave frustum-shaped structure.

8. The drum-shaped coupling dual-fan power transmission mechanism according to claim 2, characterized in that, The suction port (33) is provided with several sets of slots (38), and rectangular slots (39) are provided on the inner walls of both sides of the slots (38). A circular slot (310) is connected below the slots (38). It also includes several sets of rotating rods (311). The rotating rods (311) can rotatably pass through the outer frame (36). Rectangular blocks (312) are fixed on both sides of the bottom of the rotating rods (311). The bottom of the rectangular blocks (312) can be adapted to pass through the rectangular slots (39) and placed in the circular slots (310). Twisting the rotating rods (311) causes the rectangular blocks (312) and the rectangular slots (39) to be misaligned, which is used to prevent the rotating rods (311) and the outer frame (36) from moving upward.

9. A high-speed sweeper, characterized in that, Includes the drum-shaped coupling dual-fan power transmission mechanism as described in any one of claims 1-8.

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