A debris collection device for longwall panel drilling
Patent Information
- Application Number
- CN202522474343.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-21
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2035-11-21
AI Technical Summary
[0003]为解决上述的技术问题本实用新型提供一种用于长城板钻孔的碎屑收集装置,目的在于解决难以对靠近碎屑收集架另一端的碎屑产生有效的吸附牵引力的技术问题
碎屑抽风管连接外部负压抽屑装置(如集尘器),当碎屑收集空腔汇聚较多碎屑时,此时下一个板材还没输送至钻孔装置,启动外部的负压抽屑装置,使得在靠近碎屑抽风管的附近形成强负压区,直接吸附该区域的碎屑,对于远离碎屑抽风管,该区域气流较弱,推屑块沿收集空腔滑动,其底部的弹性刮屑头紧贴空腔底面,通过摩擦与推压将滞留碎屑刮向碎屑抽风管方向,使碎屑持续向碎屑抽风管聚集,确保碎屑收集空腔全长范围内的碎屑均被有效清理,避免因负压不足导致的碎屑滞留;同时,刮屑头采用弹性材料(如橡胶或柔性聚氨酯),既能保证与碎屑收集空腔的底面充分接触以避免碎屑残留,又能适应碎屑收集空腔的底面微小不平整度,减少磨损和卡滞。
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Figure CN224914929U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of Great Wall board processing, and in particular to a debris collection device for drilling holes in Great Wall boards. Background Technology
[0002] In the production of Great Wall steel panels, drilling is a crucial process used to secure the bolts through the panels. During drilling, the panels are first precisely positioned at the drilling station by a conveyor, and then the drilling device performs the drilling operation. A debris collection rack is typically located directly below the drilling device to collect the debris generated during drilling. One end of the collection rack is connected to a negative pressure debris extraction device (such as a centrifugal fan or industrial dust collector), which uses airflow adsorption to draw the debris into a centralized processing system. However, existing negative pressure debris extraction devices have significant drawbacks in actual operation. Because the extraction device is usually fixed to one end of the collection rack, its effective suction range is limited by fluid dynamics principles. Under limited negative pressure conditions, the airflow intensity gradually decreases along the length of the collection rack. This attenuation results in insufficient negative pressure gradients at locations far from the inlet of the extraction device, especially near the other end of the debris collection rack, where the airflow velocity drops significantly, making it difficult to generate effective adsorption and traction force on the debris. The debris often accumulates and cannot be effectively extracted. Utility Model Content
[0003] To solve the above-mentioned technical problems, this utility model provides a debris collection device for drilling holes in Great Wall boards, aiming to solve the technical problem of difficulty in generating effective adsorption and traction force for debris near the other end of the debris collection rack.
[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A debris collection device for drilling into Great Wall planks includes a base plate. A conveying device, a drilling device, and a debris collection section are located on the top of the base plate. The drilling device is positioned above the conveying device, and the debris collection section is positioned below the conveying device. The debris collection section includes a debris collection frame located on the top of the base plate. A debris collection cavity is formed at the top of the debris collection frame. A debris exhaust pipe is provided at one end of the debris collection cavity. The exhaust pipe is used to connect to an external negative pressure debris extraction device. A chip pusher block is slidably connected inside the debris collection cavity. A chip scraper head is provided at the bottom of the chip pusher block. The chip scraper head is elastic, allowing it to abut against the bottom surface of the debris collection cavity.
[0005] The debris extraction duct connects to an external negative pressure debris extraction device (such as a dust collector). When a large amount of debris accumulates in the debris collection cavity before the next sheet material is delivered to the drilling device, the external negative pressure debris extraction device is activated, creating a strong negative pressure zone near the debris extraction duct. This zone directly adsorbs the debris in the area. For areas further away from the debris extraction duct, where the airflow is weaker, the debris pusher slides along the collection cavity. Its elastic scraper head is in close contact with the bottom surface of the cavity, scraping the trapped debris towards the debris extraction duct through friction and pushing. This ensures that the debris continuously accumulates in the debris extraction duct, effectively cleaning all debris along the entire length of the debris collection cavity and preventing debris retention due to insufficient negative pressure. At the same time, the scraper head is made of elastic material (such as rubber or flexible polyurethane), which ensures full contact with the bottom surface of the debris collection cavity to avoid debris residue, and can adapt to minor unevenness in the bottom surface of the debris collection cavity, reducing wear and jamming.
[0006] Furthermore, in this application, the bottom of the chip pusher is provided with a first mounting plate and a second mounting plate, the second mounting plate is slidably connected to the bottom of the chip pusher, the first mounting plate and the second mounting plate are separated to form an installation gap, and the top of the chip scraper head is provided with a chip scraper seat, the chip scraper seat is located inside the installation gap.
[0007] The chip scraper seat is installed within the mounting interval formed by the first mounting plate and the second mounting plate. This structure provides a stable mounting base for the chip scraper head, and when the chip scraper head is severely worn and needs to be replaced, the second mounting plate can be removed to facilitate the replacement of the chip scraper seat with the chip scraper head.
[0008] Furthermore, in this application, a first fixing hole is provided on one side of the first mounting plate, a second fixing hole is provided inside the scraper seat, and a third fixing hole is provided inside the second mounting plate. A fixing bolt is inserted into the third fixing hole, and the fixing bolt passes through the second fixing hole so that the fixing bolt is threadedly engaged with the first fixing hole.
[0009] The fixing bolts pass through the third fixing hole of the second mounting plate and the second fixing hole inside the scraper seat in sequence, and finally tighten with the first fixing hole on the first mounting plate. As the fixing bolts are tightened, the second mounting plate will gradually move toward the first mounting plate to clamp the scraper seat, thereby preventing the scraper seat from falling out of the installation position when scraping material.
[0010] Furthermore, in this application, the bottom of the chip pusher block is provided with an installation groove, and the top of the second mounting plate is provided with an installation slider, the installation slider slidingly engaging with the installation groove.
[0011] Furthermore, in this application, a movable frame is provided on one side of the debris collection frame, and a movable cavity is opened on one side of the movable frame. A movable screw is rotatably connected inside the movable cavity. A movable motor is provided at one end of the movable frame, and the movable motor drives the movable screw to rotate. A movable screw cylinder is sleeved on the outside of the movable screw. A connecting groove communicating with the debris collection cavity is opened on one side of the debris collection frame, and a connecting plate is provided on one side of the movable screw cylinder. One end of the connecting plate passes through the connecting groove, so that one end of the connecting plate is connected to the chip pusher block.
[0012] Furthermore, in this application, guide grooves are provided on both sides of the interior of the debris collection cavity, and guide sliders are provided on both sides of the chip pusher block. The guide sliders on both sides of the chip pusher block are respectively slidably engaged with the guide grooves on both sides of the debris collection cavity.
[0013] Furthermore, in this application, a baffle plate is provided laterally inside the debris collection cavity. The baffle plate is close to the other end of the debris collection frame. The baffle plate is separated from the inner bottom surface of the debris collection cavity to form a blocking cavity. The chip pusher is located inside the blocking cavity, so that the chip pusher can be moved out of the blocking cavity.
[0014] Furthermore, in this application, the top of the baffle plate is provided with a guide slope, which is inclined toward the bottom of the debris collection cavity.
[0015] Furthermore, in this application, the shape of the scraper head is an inverted triangle.
[0016] Furthermore, in this application, the interior of the debris collection cavity is provided with a debris suction head, the debris suction head is close to one end of the debris collection frame, a debris suction cavity is opened on one side of the debris collection frame, the debris suction cavity is connected to the debris exhaust pipe, and the debris suction head is conical in shape.
[0017] This utility model has the following beneficial effects: The debris extraction duct connects to an external negative pressure debris extraction device (such as a dust collector). When a large amount of debris accumulates in the debris collection cavity before the next sheet material is delivered to the drilling device, the external negative pressure debris extraction device is activated, creating a strong negative pressure zone near the debris extraction duct. This zone directly adsorbs the debris in the area. For areas further away from the debris extraction duct, where the airflow is weaker, the debris pusher slides along the collection cavity. Its elastic scraper head is in close contact with the bottom surface of the cavity, scraping the trapped debris towards the debris extraction duct through friction and pushing. This ensures that the debris continuously accumulates in the debris extraction duct, effectively cleaning all debris along the entire length of the debris collection cavity and preventing debris retention due to insufficient negative pressure. At the same time, the scraper head is made of elastic material (such as rubber or flexible polyurethane), which ensures full contact with the bottom surface of the debris collection cavity to avoid debris residue, and can adapt to minor unevenness in the bottom surface of the debris collection cavity, reducing wear and jamming. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the structure of this utility model.
[0019] Figure 2 This is a schematic diagram of the debris collection cavity of this utility model.
[0020] Figure 3 This is a schematic diagram of the chip pusher block of this utility model.
[0021] Figure 4 This is a schematic diagram of the material-blocking cavity of this utility model.
[0022] Figure 5 This is a schematic diagram of the scraper head of this utility model.
[0023] In the attached figures, the following labels are used: 100. Base plate; 200. Conveying device; 300. Drilling device; 400. Debris collection section; 410. Debris collection rack; 411. Debris collection cavity; 420. Debris suction head; 421. Debris exhaust pipe; 422. Debris suction chamber; 430. Moving frame; 431. Moving cavity; 432. Moving motor; 433. Moving lead screw; 434. Moving screw barrel; 435. Connecting groove; 436. Connecting plate; 440. 441. Baffle plate; 442. Guide slope; 450. Baffle cavity; 451. Chip pusher block; 452. Guide slider; 453. First mounting plate; 454. Chip scraper seat; 455. Chip scraper head; 456. Installation interval; 457. Second mounting plate; 458. Mounting slider; 459. Mounting groove; 460. Guide groove; 461. First fixing hole; 462. Second fixing hole; 463. Fixing bolt. Detailed Implementation
[0024] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0025] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0026] In the description of this utility model, it should be noted that, 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, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between 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.
[0027] Reference Figures 1-5In some specific embodiments, a debris collection device for drilling holes in Great Wall planks includes a base plate 100. The top of the base plate 100 is provided with a conveying device 200, a drilling device 300, and a debris collection section 400. The drilling device 300 is located above the conveying device 200, and the debris collection section 400 is located below the conveying device 200. The debris collection section 400 includes a debris collection rack 410 located on the top of the base plate 100. The top of the debris collection rack 410 has a debris collection cavity 411. One end of the debris collection cavity 411 is provided with a debris exhaust pipe 421, which is used to connect to an external negative pressure debris extraction device. A chip pusher block 450 is slidably connected inside the debris collection cavity 411. The bottom of the chip pusher block 450 is provided with a chip scraper head 454. The chip scraper head 454 is elastic, so that the chip scraper head 454 abuts against the bottom surface of the debris collection cavity 411.
[0028] Through the above technical solution, the debris extraction pipe 421 is connected to an external negative pressure debris extraction device (such as a dust collector). When a large amount of debris accumulates in the debris collection cavity 411, before the next board is delivered to the drilling device 300, the external negative pressure debris extraction device is activated, creating a strong negative pressure zone near the debris extraction pipe 421, directly adsorbing the debris in that area. For areas far from the debris extraction pipe 421, the airflow is weaker, and the chip pusher 450 slides along the collection cavity, with its elastic chip scraper head 454 closely adhering to the bottom surface of the cavity. The scraper head 454 scrapes the trapped debris towards the debris extraction duct 421 through friction and pushing, so that the debris continuously accumulates in the debris extraction duct 421, ensuring that the debris in the entire length of the debris collection cavity 411 is effectively cleaned, and avoiding debris retention due to insufficient negative pressure. At the same time, the scraper head 454 is made of elastic material (such as rubber or flexible polyurethane), which can ensure full contact with the bottom surface of the debris collection cavity 411 to avoid debris residue, and can also adapt to the slight unevenness of the bottom surface of the debris collection cavity 411, reducing wear and jamming.
[0029] Reference Figures 3-5 In some specific embodiments, the bottom of the chip pusher 450 is provided with a first mounting plate 452 and a second mounting plate 456. The second mounting plate 456 is slidably connected to the bottom of the chip pusher 450. The first mounting plate 452 and the second mounting plate 456 are separated to form an installation gap 455. The top of the chip scraper head 454 is provided with a chip scraper seat 453, which is located inside the installation gap 455.
[0030] With the above technical solution, the chip scraper seat 453 is installed in the installation interval 455 formed by the first mounting plate 452 and the second mounting plate 456. This structure provides a stable installation base for the chip scraper head 454. On the other hand, when the chip scraper head 454 is severely worn and needs to be replaced, the second mounting plate 456 can be removed, making it easy to replace the chip scraper seat 453 with the chip scraper head 454.
[0031] Reference Figures 3-5 In some specific embodiments, a first fixing hole 460 is provided on one side of the first mounting plate 452, a second fixing hole 461 is provided inside the scraper seat 453, and a third fixing hole 462 is provided inside the second mounting plate 456. A fixing bolt 463 is inserted into the third fixing hole 462 and passes through the second fixing hole 461, so that the fixing bolt 463 is threadedly engaged with the first fixing hole 460.
[0032] Through the above technical solution, the fixing bolt 463 passes through the third fixing hole 462 of the second mounting plate 456 and the second fixing hole 461 inside the scraper seat 453 in sequence, and finally tightens with the first fixing hole 460 on the first mounting plate 452. As the fixing bolt 463 is tightened, the second mounting plate 456 will gradually move towards the first mounting plate 452 to clamp the scraper seat 453, thereby preventing the scraper seat 453 from falling out of the installation position when scraping materials.
[0033] Reference Figure 5 In some specific embodiments, the bottom of the chip pusher block 450 is provided with a mounting groove 458, and the top of the second mounting plate 456 is provided with a mounting slider 457, which slides in cooperation with the mounting groove 458.
[0034] With the above technical solution, when the second mounting plate 456 gradually moves toward the first mounting plate 452, the mounting slider 457 slides and engages with the mounting groove 458, thereby facilitating the guidance of the position of the second mounting plate 456 and enabling the second mounting plate 456 to accurately abut against the scraper seat 453.
[0035] Reference Figures 3-5 In some specific embodiments, a movable frame 430 is provided on one side of the debris collection rack 410, and a movable cavity 431 is opened on one side of the movable frame 430. A movable screw 433 is rotatably connected inside the movable cavity 431. A movable motor 432 is provided at one end of the movable frame 430, and the movable motor 432 drives the movable screw 433 to rotate. A movable screw cylinder 434 is sleeved on the outside of the movable screw 433. A connecting groove 435 communicating with the debris collection cavity 411 is opened on one side of the debris collection rack 410. A connecting plate 436 is provided on one side of the movable screw cylinder 434. One end of the connecting plate 436 passes through the connecting groove 435, so that one end of the connecting plate 436 is connected to the chip pusher block 450.
[0036] With the above technical solution, when it is necessary to push the debris, the moving motor 432 starts, driving the moving screw 433 to rotate in the moving cavity 431. The moving screw 434, which is sleeved on the moving screw 433, has a thread inside that matches the screw. According to the transmission principle of the thread, when the moving screw 433 rotates, the moving screw 434 cannot rotate with it. It can only move linearly along the axis of the moving screw 433 under the constraint of the moving cavity 431, so as to facilitate the pushing block 450 to push the debris in the debris collection cavity 411 through the connecting plate 436.
[0037] Reference Figures 4-5 In some specific embodiments, guide grooves 459 are provided on both sides of the interior of the debris collection cavity 411, and guide sliders 451 are provided on both sides of the chip pusher block 450. The guide sliders 451 on both sides of the chip pusher block 450 slide in cooperation with the guide grooves 459 on both sides of the debris collection cavity 411.
[0038] Through the above technical solution, during the chip scraping process, the friction between the chip scraper head 454 and the bottom surface and the chips will generate a torque that causes the chip pusher block 450 to twist. By the sliding engagement of the guide sliders 451 on both sides of the chip pusher block 450 with the guide grooves 459 on both sides of the chip collection cavity 411, this torque can be effectively decomposed and transmitted to the interior of the robust chip collection cavity 411, and borne by the entire chip collection frame 410, thereby protecting the moving screw barrel 434 from bending stress and ensuring smooth power transmission.
[0039] Reference Figures 4-5 In some specific embodiments, a baffle plate 440 is provided laterally inside the debris collection cavity 411. The baffle plate 440 is close to the other end of the debris collection frame 410. The baffle plate 440 and the inner bottom surface of the debris collection cavity 411 are separated to form a retaining cavity 442. The chip pusher 450 is located in the retaining cavity 442, so that the chip pusher 450 can be moved out of the retaining cavity 442.
[0040] With the above technical solution, when the drilling device 300 drills a hole in the board, the chip pusher block 450 is located in the retaining cavity 442. This is the peak period for chip generation. Due to the obstruction of the retaining plate 440, the chips will fall into the chip collection cavity 411 instead of falling onto the top surface of the chip pusher block 450 or into the retaining cavity 442. This prevents the chips from falling into the pushing dead angle of the chip pusher block 450, which would prevent the chip pusher block 450 from pushing the chips to the chip exhaust pipe 421. When the drilling device 300 waits for the next board to enter the drilling position, it moves the chip pusher block 450 to push the chips. This prevents the chip pusher block 450 from moving out of the retaining cavity 442 and causing a large amount of chips to enter the retaining cavity 442.
[0041] Reference Figures 3-5In some specific embodiments, the top of the baffle plate 440 is provided with a guide slope 441, which is inclined toward the bottom of the debris collection cavity 411.
[0042] With the above technical solution, when the debris generated by drilling falls onto the baffle plate 440, the inclined guide slope 441 changes the impact plane of the debris. Under the action of gravity, the debris will slide naturally down the slope into the debris collection cavity 411, thereby reducing the accumulation of debris on the baffle plate 440.
[0043] Reference Figures 3-5 In some specific embodiments, the scraper head 454 is shaped like an inverted triangle.
[0044] With the above technical solution, since the scraper head 454 is shaped like an inverted triangle, when the scraper head 454 scrapes the debris from the bottom surface of the debris collection cavity 411, the tip of the inverted triangle contacts the debris first. The tip of the triangle can better embed into the bottom surface and scrape up and clean the slight debris attached to the bottom surface, thereby improving the debris cleaning effect.
[0045] Reference Figures 1-2 In some specific embodiments, a debris suction head 420 is provided inside the debris collection cavity 411. The debris suction head 420 is located near one end of the debris collection rack 410. A debris suction cavity 422 is provided on one side of the debris collection rack 410. The debris suction cavity 422 is connected to the debris exhaust pipe 421. The debris suction head 420 is cone-shaped.
[0046] With the above technical solution, when the external negative pressure chip removal device draws air through the chip extraction pipe 421, the airflow will increase significantly when it passes through the smaller opening end of the cone, due to the cone shape of the chip suction head. According to the principle of fluid mechanics, this high-speed airflow can form a stronger local negative pressure at the opening of the suction head, generating a strong adsorption force on the chips, thereby improving the efficiency of chip removal.
[0047] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
Claims
1. A debris collection device for drilling holes in Great Wall planks, comprising a base plate, wherein a conveying device, a drilling device, and a debris collection section are provided on the top of the base plate, the drilling device being located above the conveying device, and the debris collection section being located below the conveying device, characterized in that, The debris collection unit includes a debris collection rack located on the top of the base plate. The top of the debris collection rack has a debris collection cavity. One end of the debris collection cavity is provided with a debris exhaust pipe for connecting to an external negative pressure debris extraction device. A chip pusher block is slidably connected inside the debris collection cavity. The bottom of the chip pusher block is provided with a chip scraper head. The chip scraper head is elastic, so that the chip scraper head abuts against the bottom surface of the debris collection cavity.
2. The debris collection device for drilling holes in the Great Wall as described in claim 1, characterized in that, The bottom of the chip pusher is provided with a first mounting plate and a second mounting plate. The second mounting plate is slidably connected to the bottom of the chip pusher. The first mounting plate and the second mounting plate are separated to form an installation gap. The top of the chip scraper head is provided with a chip scraper seat, which is located inside the installation gap.
3. A debris collection device for drilling holes in the Great Wall as described in claim 2, characterized in that, A first fixing hole is provided on one side of the first mounting plate, a second fixing hole is provided inside the scraper seat, and a third fixing hole is provided inside the second mounting plate. A fixing bolt is inserted into the third fixing hole and passes through the second fixing hole so that the fixing bolt is threadedly engaged with the first fixing hole.
4. A debris collection device for drilling holes in the Great Wall as described in claim 3, characterized in that, The bottom of the chip pusher block is provided with a mounting groove, and the top of the second mounting plate is provided with a mounting slider, which slides in cooperation with the mounting groove.
5. A debris collection device for drilling holes in the Great Wall as described in claim 1, characterized in that, The debris collecting rack has a movable frame on one side, and a movable cavity is opened on one side of the movable frame. A movable screw is rotatably connected inside the movable cavity. A movable motor is provided at one end of the movable frame, and the movable motor drives the movable screw to rotate. A movable screw cylinder is sleeved on the outside of the movable screw. A connecting groove communicating with the debris collecting cavity is opened on one side of the debris collecting rack. A connecting plate is provided on one side of the movable screw cylinder. One end of the connecting plate passes through the connecting groove, so that one end of the connecting plate is connected to the chip pusher block.
6. A debris collection device for drilling holes in the Great Wall as described in claim 5, characterized in that, The debris collection cavity has guide grooves on both sides inside, and the chip pusher has guide sliders on both sides. The guide sliders on both sides of the chip pusher slide in sliding engagement with the guide grooves on both sides of the debris collection cavity.
7. A debris collection device for drilling holes in the Great Wall as described in claim 5, characterized in that, The inside of the debris collection cavity is provided with a baffle plate in the horizontal direction. The baffle plate is close to the other end of the debris collection frame. The baffle plate and the inner bottom surface of the debris collection cavity are separated to form a blocking cavity. The chip pusher is located in the blocking cavity, so that the chip pusher can be moved out of the blocking cavity.
8. A debris collection device for drilling holes in the Great Wall as described in claim 7, characterized in that, The top of the baffle plate is provided with a guide slope, which is inclined toward the bottom of the debris collection cavity.
9. A debris collection device for drilling holes in the Great Wall as described in claim 1, characterized in that, The scraper head is shaped like an inverted triangle.
10. A debris collection device for drilling holes in the Great Wall as described in claim 1, characterized in that, The debris collection cavity is equipped with a debris suction head, which is located near one end of the debris collection frame. A debris suction chamber is provided on one side of the debris collection frame, and the debris suction chamber is connected to the debris exhaust pipe. The debris suction head is cone-shaped.