A combined dust collection device

Abstract

The present invention discloses a combined dust suction device, belonging to the technical field of dust suction devices. The main technical solution is as follows: including a housing having an air duct; a transition piece installed on the housing; a driving piece installed on the housing, with a cutting piece installed on the driving piece; a combined turbine installed on the driving piece, the combined turbine including a plurality of axial-flow blades and a plurality of centrifugal blades, the combined turbine corresponding to the transition piece; a fairing installed on the transition piece; and a dust suction hood installed on the housing. The present invention combines the advantages of axial-flow fans and centrifugal fans. On the one hand, it can provide a larger air volume to accommodate a larger amount of dust, and on the other hand, it can provide a large air pressure to resist the resistance inside the device, enabling the dust to be discharged smoothly and quickly, and achieving a better dust removal effect.

Description

Technical Field

[0001] The present invention relates to the technical field of dust collection devices, and specifically, mainly relates to a combined dust collection device. Background Art

[0002] When cutting boards, composite boards and other plates with cutting tools such as high-speed rotating milling cutters, a large amount of dust and debris will be generated. If these dust and debris are not cleaned up immediately, many adverse consequences will occur: First, it will cause environmental pollution and endanger the health of personnel; Second, the debris will rub against the tool at high speed, and the tool will wear out rapidly, resulting in frequent tool replacement and increased consumables; Finally, due to the high temperature generated by the friction between the debris and the tool, on the one hand, the processing speed of the equipment will be reduced and the efficiency will be lowered, and on the other hand, the high temperature may cause the debris to catch fire and lead to disaster accidents. Therefore, it is necessary to clean up the dust and debris in a timely manner.

[0003] In the prior art, in order to clean up the dust and debris, it is often achieved by installing a dust collection device with negative pressure on the cutting tool. For example, an automatic dust collection cutting machine disclosed in a Chinese patent document with the authorization announcement number CN103707350B works by installing a dust collection hood with negative pressure on the cutting device. Generally, such a dust collection device has a pipeline and a negative pressure fan connected to the pipeline. The existing negative pressure fans generally have the following two forms:

[0004] One is a centrifugal fan. This kind of fan uses a centrifugal fan and can provide a relatively large air pressure, but the flow rate of the air flow is not fast, resulting in too little air volume to accommodate a large number of dust and debris. Moreover, the centrifugal fan discharges air along the radial side of the rotating shaft. When the internal structure of the dust collection pipeline is complex, the air pressure will be weakened a lot;

[0005] The other is an axial flow fan. This kind of fan can accelerate the air flow speed, and the accelerated air flow flows along the axial direction of the rotating shaft, so that a larger air volume can be generated to carry more dust and debris. However, its air pressure is not as good as that of the centrifugal fan. After the air flow encounters resistance, the air volume will drop significantly, resulting in a slowdown in the air speed, making it difficult to suck up heavier dust and debris, and the dust collection effect is not ideal.

[0006] In view of this, it is necessary to improve the existing dust collection device to adapt to the working conditions of plate cutting. Summary of the Invention

[0007] Aiming at the deficiencies of the prior art, the present invention provides a combined dust collection device.

[0008] A combined dust suction device disclosed by the present invention includes: a housing having an air duct; a transition member mounted on the housing; a driving member mounted on the housing, with a cutting member mounted on the driving member; a combined turbine mounted on the driving member, the combined turbine including a plurality of axial flow blades and a plurality of centrifugal blades, the combined turbine corresponding to the transition member; a fairing mounted on the transition member; and a dust suction hood mounted on the housing.

[0009] Preferably, the driving member is a double-shaft motor and has a front shaft end and a rear shaft end. The cutting member is mounted on the front shaft end, and the combined turbine is mounted on the rear shaft end.

[0010] Preferably, the housing includes an outer shell, an inner shell, and a plurality of partition parts. The inner shell is disposed within the outer shell, and the partition parts are connected between the outer shell and the inner shell. The air duct is formed between adjacent partition parts; the driving member is mounted within the inner shell.

[0011] Preferably, the combined turbine further includes a rotating part, and both the axial flow blades and the centrifugal blades are mounted on the rotating part; a shaft hole is formed in the rotating part, and the rear shaft end of the driving member is mounted within the shaft hole.

[0012] Preferably, a plurality of the centrifugal blades are arranged in one layer along the axial direction of the driving member, and a plurality of the axial flow blades are arranged in two layers along the axial direction of the driving member; the axial flow blades are closer to the driving member along the axial direction of the driving member, and the centrifugal blades are farther from the driving member along the axial direction of the driving member.

[0013] Preferably, the transition member includes an acceleration section and a pressurization section. The acceleration section has a straight cylinder structure and is connected to the housing. The pressurization section is connected to the acceleration section, and the pressurization section has an arc-shaped side wall; the axial flow blades correspond to the acceleration section, and the centrifugal blades correspond to the pressurization section.

[0014] Preferably, the fairing includes a wind bowl and guide vanes. The wind bowl includes a rectifying part and a connecting part. The rectifying part is connected to the pressurization section, and the connecting part is connected to the rectifying part; the guide vanes are connected to the rectifying part.

[0015] Preferably, the fairing further includes a fitting part disposed within the wind bowl, and the guide vanes are connected between the wind bowl and the fitting part.

[0016] Preferably, the matching portion is provided with a matching surface, and the matching surface faces the combined turbine; the combined turbine further comprises a guiding portion, and the guiding portion is mounted on the rotating portion, and the guiding portion corresponds to the matching surface of the matching portion.

[0017] Preferably, the dust hood includes a connecting frame, a telescopic cavity and an air inlet hood, the connecting frame is connected to the shell, the telescopic cavity is connected to the connecting frame, and the air inlet hood is installed on the telescopic cavity; the front axle end and the cutting piece both correspond to the dust hood.

[0018] The beneficial effects of this application are:

[0019] On the one hand, it combines the advantages of axial flow fans and centrifugal fans. In the combined turbine of double-layer axial flow blades and single-layer centrifugal blades, the double-layer axial flow blades can speed up the airflow, thereby providing a larger air volume to accommodate a larger amount of dust, while the single-layer centrifugal blades can provide a large wind pressure to resist the resistance inside the device, thereby providing a strong power for the airflow carrying dust and debris to pass through the conveying duct, solving the problem of poor dust removal effect caused by insufficient wind pressure when using an axial flow fan alone and insufficient air volume when using a centrifugal fan alone.

[0020] On the other hand, in the process of collecting dust and debris on the panel, the airflow is first guided by the straight part of the air inlet channel, and then guided by the curved part, which can generate an upward cyclone in the dust hood. The vacuum degree in the middle of the cyclone is higher, which is conducive to lifting the static debris on the panel and allowing it to smoothly enter the air duct to be collected, making dust removal faster and more efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention from a first viewing angle;

[0023] Figure 2 It is a schematic diagram of the overall structure of the present invention from a second viewing angle;

[0024] Figure 3 It is a schematic diagram of the explosion structure of the present invention from a first viewing angle;

[0025] Figure 4 This is a schematic diagram of the explosion structure from a second viewing angle of the present invention.

[0026] Description of reference numerals:

[0027] 1. Housing; 11. Outer shell; 111. Mounting hole; 12. Inner shell; 13. Partition part; 131. Air duct;

[0028] 2. Transition piece; 21. Acceleration section; 22. Pressurization section; 221. Fitting convex block;

[0029] 3. Driving part; 31. Front shaft end; 32. Rear shaft end; 33. Cutting piece;

[0030] 4. Combined turbine; 41. Rotating part; 411. Shaft hole; 42. Axial flow fan blade; 43. Centrifugal fan blade; 44. Guiding part;

[0031] 5. Fairing; 51. Wind bowl; 511. Rectifying part; 5111. Connecting convex block; 512. Connecting part; 52. Guide vane; 53. Fitting part; 531. Fitting surface; 532. Dome;

[0032] 6. Dust suction hood; 61. Connecting frame; 611. Mounting notch; 62. Telescopic cavity; 621. Connecting top surface; 622. Connecting bottom surface; 623. Arc edge; 624. Air inlet; 63. Air inlet hood; 631. Fitting surface; 632. Air inlet channel; 6321. Straight part; 6322. Bending part. Detailed implementation manners

[0033] The following will disclose multiple implementation manners of the present invention with diagrams. For the sake of clear illustration, many practical details will be described together in the following narration. However, it should be understood that these practical details are not used to limit the present invention. That is to say, in some implementation manners of the present invention, these practical details are not necessary. In addition, for the purpose of simplifying the diagrams, some conventional structures and components will be shown in a simple schematic manner in the diagrams.

[0034] It should be noted that all directional indications such as up, down, left, right, front, rear... in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture as shown in the attached drawings. If this specific posture changes, then the directional indications will also change accordingly.

[0035] In addition, in the present invention, descriptions such as "first" and "second" are for descriptive purposes only, and do not particularly refer to the order or sequence. Nor are they used to limit the present invention. They are merely used to distinguish components or operations described with the same technical terms, and should not be construed as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined as "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0036] To further understand the content, features and effects of the present invention, the following embodiments are exemplified and described in detail with reference to the accompanying drawings as follows:

[0037] Refer to Figures 1-4 , a combined dust suction device disclosed by the present invention, includes a housing 1, a transition member 2, a driving member 3, a combined turbine 4, a fairing 5 and a dust suction hood 6. Among them, the driving member 3 is installed in the housing 1, the combined turbine 4 is installed on the driving member 3, the fairing 5 is installed on the housing 1 through the transition member 2, the transition member 2 and the fairing 5 enclose the combined turbine 4 therein, and the dust suction hood 6 is also installed on the housing 1. When the device is working, the driving member 3 is powered on and started, and the combined turbine 4 works, so that the airflow carrying dust and debris enters the housing 1 through the dust suction hood 6. The airflow is guided, diverted and rectified by the transition member 2 and the fairing 5, and finally flows out from the end of the fairing 5, so that the dust and debris entrained therein are collected and processed. The present invention can be used in the use scenario of plate cutting, but is not limited to plate cutting, and can be retrofitted and applied to any equipment that generates dust or debris.

[0038] Refer to Figures 1-4 , the housing 1 includes an outer shell 11, an inner shell 12 and a partition part 13. Among them, the outer shell 11 is a cylindrical structure with openings at both ends, the cross-section of the outer shell 11 is rectangular, the inner shell 12 is installed inside the outer shell 11, the inner shell 12 is a cylindrical structure and both ends of the inner shell 12 are also provided with openings, and a gap is provided between the inner shell 12 and the outer shell 11; there are multiple partition parts 13, the partition parts 13 are strip-shaped plates, the partition parts 13 are arranged in the gap between the inner shell 12 and the outer shell 11 and are arranged along the length direction of the inner shell 12 and the outer shell 11, and the partition parts 13 are fixedly connected to both the inner shell 12 and the outer shell 11, so that the inner shell 12 can maintain relative fixation with the outer shell 11 in position, and an air duct 131 is formed between adjacent partition parts 13 for the airflow to pass through.

[0039] Refer to Figures 1-4, the transition piece 2 includes an acceleration section 21 and a pressurization section 22. The acceleration section 21 is installed at the open end of the outer shell 11. The main body of the acceleration section 21 is a long and straight cylinder with openings at both ends, which is used to guide the high-speed air flow. The pressurization section 22 is a flared bowl-shaped structure, and its side wall is an outwardly convex arc structure. There are circular openings at both ends of the pressurization section 22. The small-end opening of the pressurization section 22 is integrally connected to the opening of the acceleration section 21 away from the outer shell 11. Multiple mating protrusions 221 are provided at the edge of the large-end opening of the pressurization section 22, and through holes are provided on the mating protrusions 221 for connecting the fairing 5. The direction of the air flow changes at the pressurization section 22, which is beneficial to generating a higher air pressure.

[0040] Refer to Figures 1-4 , the driving member 3 adopts a double-shaft motor. The driving member 3 is fixedly installed in the inner shell 12. The axis of the driving member 3 is arranged along the axis direction of the inner shell 12. The end of the axis of the driving member 3 away from the transition piece 2 is the front shaft end 31, and the end of the axis of the driving member 3 close to the transition piece 2 is the rear shaft end 32. A cutting member 33 is installed at the front shaft end 31 of the driving member 3. In this embodiment, the cutting member 33 is a milling cutter. When the driving member 3 works, it can drive the milling cutter to rotate to realize the function of cutting the wooden board. The rear shaft end 32 of the driving member 3 is connected to the combined turbine 4.

[0041] Refer to Figures 1-4 , the combined turbine 4 includes a rotating part 41, an axial-flow fan blade 42, a centrifugal fan blade 43, and a guiding part 44. Among them, the rotating part 41 is a rod-shaped structure, and a shaft hole 411 is opened at the axis of the rotating part 41. The rear shaft end 32 of the driving member 3 passes through the shaft hole 411 and is coaxially fixedly connected to the rotating part 41. The side wall of the rotating part 41 is inclined. The above-mentioned axial-flow fan blade 42 and centrifugal fan blade 43 are both fixedly connected to the side wall of the rotating part 41, and the axial-flow fan blade 42 is relatively closer to the driving member 3 along the axial direction, while the centrifugal fan blade 43 is relatively farther from the driving member 3 along the axial direction. There are multiple axial-flow fan blades 42 and centrifugal fan blades 43. The exhaust direction of the axial-flow fan blade 42 is along the axial direction, which is used to increase the flow rate of the air flow, while the exhaust direction of the centrifugal fan blade 43 is perpendicular to the axial direction, which is used to pressurize the air flow and resist the resistance generated inside the device. The guiding part 44 is a circular plate, which is arranged at the end of the rotating part 41 away from the driving member 3 and is coaxially fixed to the rotating part 41. The guiding part 44 is used to provide a guiding effect for the air flow, so that the pressurized air flow can bypass the guiding part 44 and flow through the outside of the guiding part 44.

[0042] Refer to Figures 1-4Specifically, two layers of axial flow blades 42 are provided, and each layer of axial flow blades 42 is provided with a plurality of axial flow blades, and each layer of axial flow blades 42 is evenly arranged at equal intervals along the circumferential direction of the outer wall of the rotating portion 41, and a gap is provided between two adjacent layers of axial flow blades 42; one layer of centrifugal blades 43 is provided, and a plurality of centrifugal blades 43 are evenly arranged at equal intervals along the circumferential direction of the outer wall of the rotating portion 41; the two layers of axial flow blades 42 are correspondingly arranged in the acceleration section 21 of the transition piece 2, and the centrifugal blades 43 are correspondingly arranged in the pressurization section 22 of the transition piece 2. After the airflow is accelerated by the axial flow blades 42, a larger air volume can be generated at the dust hood 6, thereby increasing the range of action of the device in absorbing dust and debris, and the pressure of the airflow can be increased after the airflow passes through the centrifugal blades 43, which is conducive to the device absorbing a larger amount of dust and debris.

[0043] Reference Figures 1-4 The fairing 5 includes a wind bowl 51, a guide vane 52 and a matching portion 53, wherein the wind bowl 51 includes a rectifying portion 511 and a connecting portion 512, the rectifying portion 511 is a trumpet-shaped structure, and openings are provided at both ends of the rectifying portion 511, the large end opening of the rectifying portion 511 is connected to the opening of the pressurized section 22 of the transition piece 2, and a connecting protrusion 5111 is provided at the edge of the large end opening of the rectifying portion 511, and a through hole is provided on the connecting protrusion 5111, and the rectifying portion 5111 is connected to the pressurized section 22 through a connecting piece (not shown in the figure) penetrated between the connecting protrusion 5111 and the matching protrusion 221, and the connecting portion 512 is integrally connected to the small end opening of the rectifying portion 511, and the connecting portion 512 is a cylindrical structure, and the connecting portion 512 can be connected to a pipe for collecting dust and debris, so that the dust and debris are finally collected.

[0044] Reference Figures 1-4 The mating part 53 of the fairing 5 is a rotating body, the mating part 53 is coaxially arranged inside the wind bowl 51, and a gap is arranged between the mating part 53 and the inner wall of the wind bowl 51, the mating part 53 is provided with a mating surface 531 facing the combined turbine 4 along the axial direction, and the mating part 53 is also provided with a dome 532 away from the combined turbine 4 along the axial direction, wherein the mating surface 531 is a plane, the size and size of the mating surface 531 are the same as the size and size of the guide part 44, the mating part 53 has an arc-shaped outer wall, the mating surface 531 cooperates with the guide part 44 to provide guidance for the airflow, so that the pressurized airflow can flow through the gap between the mating part 53 and the wind bowl 51, which is convenient for rectification.

[0045] Reference Figures 1-4, the fairing 5 is provided with a plurality of guide vanes 52. The guide vanes 52 are arc-shaped blades. The guide vanes 52 are arranged at the interval between the mating part 53 and the rectifying part 511, and the guide vanes 52 are fixedly connected to both the mating part 53 and the rectifying part 511. The plurality of guide vanes 52 are evenly arranged at equal intervals around the axis direction of the mating part 53. Channels are formed between the guide vanes 52. One end of the channel leads to the pressurizing section 22 of the transition piece 2, and the other end leads to the connecting part 512 of the fairing 5. The guide vanes 52 can guide the direction of the pressurized air flow, organize the turbulent flow into laminar flow, and finally enable the air flow flowing out of the connecting part 512 to enter the connecting part 512 along the axis direction, facilitating the transmission and collection of the air flow.

[0046] Refer to Figures 1-4 , the dust suction hood 6 is installed at the opening of the outer shell 11 near the front shaft end 31. The dust suction hood 6 is integrally made of an elastic material, which is rubber in this embodiment. The dust suction hood 6 includes a connecting frame body 61, a telescopic cavity body 62 and an air inlet hood 63. Among them, the connecting frame body 61 is a cylindrical structure with a rectangular cross-section. Both ends of the connecting frame body 61 are provided with openings. The connecting frame body 61 is sleeved at the opening of the outer shell 11. An installation notch 611 is arranged at the edge of the opening of the connecting frame body 61 near the rear shaft end 32. Correspondingly, an installation hole 111 is opened on the outer shell 11. The connecting frame body 61 is connected to the outer shell 11 through a connecting piece (not shown in the figure) passing through the installation notch 611 and the installation hole 111.

[0047] Refer to Figures 1-4 , the telescopic cavity body 62 is integrally annular. The telescopic cavity body 62 is connected to the opening of the connecting frame body 61 facing away from the rear shaft end 32. The telescopic cavity body 62 has a connecting top surface 621 and a connecting bottom surface 622. Among them, the connecting top surface 621 faces upward and is close to the rear shaft end 32, and the connecting bottom surface 622 faces downward and is away from the rear shaft end 32. The connecting top surface 621 is integrally connected to the connecting frame body 61. An arc-shaped edge 623 is connected between the connecting top surface 621 and the connecting bottom surface 622, so that the telescopic cavity body 62 can form a flat cavity structure. An air inlet 624 is opened in the middle of the telescopic cavity body 62. The air inlet 624 is a circular through hole. The front shaft end 31 of the driving member 3 and the cutting member 33 both pass through the air inlet 624 and extend below the outer shell 11.

[0048] Refer to Figures 1-4The air inlet cover 63 is a flared circular cover, the middle part of the air inlet cover 63 protrudes upward, the small end opening of the air inlet cover 63 faces upward and is fixedly connected to the edge of the air inlet port 624, the large end opening of the air inlet cover 63 faces downward, and the edge of the large end opening of the air inlet cover 63 is provided with a fitting surface 631, the fitting surface 631 is a plane, and the fitting surface 631 is used to fit with the panel to be vacuumed, thereby providing a semi-enclosed space to generate wind pressure; a plurality of air inlet channels 632 are provided on the fitting surface 631, and the air inlet channels 632 are recessed channels formed on the fitting surface 631, and the plurality of air inlet channels 632 are arranged along the driving member 3 The straight portion 6321 is arranged at the outer edge of the fitting surface 631, and the curved portion 6322 extends inward to the middle of the air inlet cover 63. The curved portion 6322 is an arc-shaped structure. When the airflow enters the air inlet cover 63, it is first guided by the straight portion 6321, and then guided by the curved portion 6322, so as to generate an upward cyclone in the dust collection hood 6. The vacuum degree in the middle of the cyclone is relatively high, which is conducive to lifting the static debris on the panel and allowing it to smoothly enter the air duct 131 to be collected.

[0049] The implementation principle of the present invention is: when in use, the fitting surface 631 of the air inlet hood 63 is fitted on the panel to be collected with dust and debris, the driving member 3 is powered on to start the driving member 3, and the driving member 3 drives the cutting member 33 to work to cut the wooden board to generate debris and dust. At the same time, the driving member 3 can drive the combined turbine 4 to work, so that the combined turbine 4 rotates at a high speed. The axial flow blades 42 and the centrifugal blades 43 of the combined turbine 4 can generate an airflow with a large air volume and high air pressure, so that the dust and debris on the panel can enter the air duct 131 of the shell 1 along with the air flow through the air inlet channel 632 on the dust collection hood 6, and then flow through the transition piece 2 and the fairing 5, and then be collected and processed by the conveying pipe connected to the transition piece 2.

[0050] The beneficial effects of the present invention are:

[0051] On the one hand, the advantages of axial flow fans and centrifugal fans are integrated. In the combined turbine 4 of the double-layer axial flow blades 42 and the single-layer centrifugal blades 43, the double-layer axial flow blades 42 can speed up the airflow, thereby providing a larger air volume to accommodate a larger amount of dust, while the single-layer centrifugal blades 43 can provide a large wind pressure to resist the resistance inside the device, thereby providing a strong power for the airflow carrying dust and debris to pass through the conveying duct, solving the problem of poor dust removal effect caused by insufficient wind pressure when using an axial flow fan alone to remove dust and insufficient air volume when using a centrifugal fan alone.

[0052] On the other hand, during the process of collecting dust and debris on the panel, the air flow is first guided by the straight portion 6321 of the air inlet passage 632, and then guided by the bending portion 6322, so as to generate an upward cyclone in the dust suction hood 6. The central vacuum degree of the cyclone is relatively high, which is conducive to raising the static debris on the panel and enabling it to smoothly enter the air duct 131 for collection, making the dust removal faster and more efficient.

[0053] The above are only the embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, various modifications and changes can be made to the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the scope of the claims of the present invention.

Claims

1. A combined dust suction device, characterized in that, it includes: a housing (1), the housing (1) having an air duct (131); a transition piece (2), the transition piece (2) being installed on the housing (1); a driving piece (3), the driving piece (3) being installed on the housing (1), and a cutting piece (33) being installed on the driving piece (3); a combined turbine (4), the combined turbine (4) being installed on the driving piece (3), the combined turbine (4) including a plurality of axial flow blades (42) and a plurality of centrifugal blades (43), the combined turbine (4) corresponding to the transition piece (2); a fairing (5), the fairing (5) being installed on the transition piece (2); a dust suction hood (6), the dust suction hood (6) being installed on the housing (1); the housing (1) includes an outer shell (11), an inner shell (12) and a plurality of partition parts (13), the inner shell (12) being arranged inside the outer shell (11), the partition parts (13) being connected between the outer shell (11) and the inner shell (12), and the air duct (131) being formed between adjacent partition parts (13); the driving piece (3) is installed in the inner shell (12); the dust suction hood (6) includes a connecting frame body (61), a telescopic cavity (62) and an air inlet hood (63), the connecting frame body (61) being connected to the housing (1), the telescopic cavity (62) being connected to the connecting frame body (61), and the air inlet hood (63) being installed on the telescopic cavity (62); the front shaft end (31) of the driving piece (3) and the cutting piece (33) both correspond to the dust suction hood (6); a fitting surface (631) is provided at the edge of the large-end opening of the air inlet hood (63); a plurality of air inlet channels (632) are provided on the fitting surface (631), the air inlet channels (632) being recessed channels formed on the fitting surface (631), and the plurality of air inlet channels (632) being evenly distributed at equal intervals along the axial direction of the driving piece (3).

2. The combined dust suction device according to claim 1, characterized in that, the driving piece (3) is a double-shaft motor and has a front shaft end (31) and a rear shaft end (32), the cutting piece (33) being installed on the front shaft end (31), and the combined turbine (4) being installed on the rear shaft end (32).

3. The combined dust suction device according to claim 2, characterized in that, the combined turbine (4) further includes a rotating part (41), and both the axial flow blades (42) and the centrifugal blades (43) are installed on the rotating part (41); a shaft hole (411) is formed on the rotating part (41), and the rear shaft end (32) of the driving piece (3) is installed in the shaft hole (411).

4. The combined dust suction device according to claim 3, characterized in that, a plurality of the centrifugal blades (43) are arranged in one layer along the axial direction of the driving piece (3), and a plurality of the axial flow blades (42) are arranged in two layers along the axial direction of the driving piece (3); The axial-flow fan blade (42) is axially close to the driving member (3) along the axial direction of the driving member (3), and the centrifugal fan blade (43) is axially away from the driving member (3) along the axial direction of the driving member (3).

5. The combined dust collection device according to any one of claims 1-4, characterized in that the transition member (2) includes an acceleration section (21) and a pressurization section (22), the acceleration section (21) has a straight cylinder structure, the acceleration section (21) is connected to the housing (1), the pressurization section (22) is connected to the acceleration section (21), and the pressurization section (22) has an arc-shaped side wall; the axial-flow fan blade (42) corresponds to the acceleration section (21), and the centrifugal fan blade (43) corresponds to the pressurization section (22).

6. The combined dust collection device according to claim 5, characterized in that the fairing (5) includes a wind bowl (51) and a guide vane (52), the wind bowl (51) includes a rectifying portion (511) and a connecting portion (512), the rectifying portion (511) is connected to the pressurization section (22), and the connecting portion (512) is connected to the rectifying portion (511); the guide vane (52) is connected to the rectifying portion (511).

7. The combined dust collection device according to claim 6, characterized in that the fairing (5) further includes a mating portion (53), the mating portion (53) is disposed in the wind bowl (51), and the guide vane (52) is connected between the wind bowl (51) and the mating portion (53).

8. The combined dust collection device according to claim 7, characterized in that the mating portion (53) is provided with a mating surface (531), and the mating surface (531) faces the combined turbine (4); the combined turbine (4) further includes a guiding portion (44), the guiding portion (44) is installed on the rotating portion (41), and the guiding portion (44) corresponds to the mating surface (531) of the mating portion (53).

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