A grinding and dust collection device

Abstract

This application relates to the technical field of grinding, and provides a grinding dust collection device, which includes a dust collection cylinder, an air extraction component at the top of the dust collection cylinder, a filter element inside the dust collection cylinder, a connector for connecting to a suction pipe on the side wall of the dust collection cylinder, an air inlet communicating with the connector, a dust baffle plate inside the dust collection cylinder, the dust baffle plate being positioned below the filter element and in front of the air inlet, the dust baffle plate being arranged around the circumference of the filter element, and the surface of the dust baffle plate being inclined from top to bottom towards the filter element; an annular dust collection channel is formed between the dust baffle plate and the inner peripheral wall of the dust collection cylinder for dust to fall, and an airflow gap is left between the dust baffle plate and the filter element. The inclined dust baffle plate of this application can reduce the occurrence of dust rising to the filter element and effectively reduce secondary pollution caused by dust rising, thereby improving the dust collection and removal efficiency of the entire grinding dust collection device.

Description

Technical Field

[0001] This application relates to the technical field of grinding, and in particular to a grinding dust collection device. Background Technology

[0002] Floor grinders are automated equipment used for grinding or polishing concrete surfaces. A lot of dust is generated during the floor grinding process. Therefore, a high-powered portable vacuum cleaner is usually needed to remove the dust during the grinding process. The portable vacuum cleaner can be connected to the floor grinder as one unit. During the grinding process, the portable vacuum cleaner can move along with the floor grinder to remove the dust.

[0003] Existing vacuum cleaners typically consist of a cylinder, a filter element, and a suction pipe interface. Dust-laden airflow enters directly into the lower part of the cylinder through the suction pipe interface. Influenced by the airflow, it usually diffuses upwards without guidance and impacts the filter element. However, this creates a problem: all dust, including a large number of heavier particles, is directly intercepted by the filter element, causing a dust cake to quickly form on its surface. This drastically increases resistance, reduces filtration efficiency, and necessitates frequent cleaning or replacement. Furthermore, the airflow entering the bottom of the cylinder violently disturbs the settled dust, causing it to rise again (i.e., secondary re-entrainment) and be re-adsorbed onto the filter element. This not only reduces the effective dust collection capacity but also creates an internal "collect-re-collect" cycle, severely wasting system efficiency and shortening maintenance cycles. Therefore, further improvements are needed. Summary of the Invention

[0004] To address the above problems, this application provides a grinding and dust collection device.

[0005] This application provides a grinding and dust collection device, which adopts the following technical solution:

[0006] A grinding and dust collection device includes a dust collection cylinder, an air extraction component at the top of the dust collection cylinder, a filter element inside the dust collection cylinder, a connector for connecting to a suction pipe on the side wall of the dust collection cylinder, an air inlet communicating with the connector, a dust baffle plate inside the dust collection cylinder, the dust baffle plate being positioned below the filter element and in front of the air inlet, the dust baffle plate being arranged around the circumference of the filter element, and the surface of the dust baffle plate being inclined from top to bottom towards the filter element; an annular dust collection channel is formed between the dust baffle plate and the inner circumferential wall of the dust collection cylinder for dust to fall, and an airflow gap is left between the dust baffle plate and the filter element; a dust collection port is provided at the bottom of the dust collection cylinder. A dust collection component is provided at the dust collection port; an installation plate is provided inside the dust collection cylinder, the filter element is installed below the installation plate, a dust cleaning component is provided inside the filter element, and a drive component is provided on the installation plate to drive the dust cleaning component to rotate around the axis of the filter element; the drive component includes a rotating shaft passing through the installation plate and extending into the filter element, and a drive source for driving the rotating shaft to rotate; the dust cleaning component includes a mounting main seat fixedly connected to the lower end of the rotating shaft, a paddle mounting seat rotatably connected to the mounting main seat, a paddle provided on the paddle mounting seat, and an elastic element that drives the paddle mounting seat to elastically reset; the paddle contacts the inner circumferential surface of the filter element, and the two ends of the elastic element are respectively hinged to the mounting main seat and the paddle mounting seat.

[0007] By adopting the above technical solution, the dust baffle is set below the filter element and in front of the air inlet, and is arranged around the circumference of the filter element. Its plate surface is inclined, which can block some of the dust entering the dust collection cylinder, so that the dust falls along the inclined surface of the dust baffle into the annular dust collection channel formed between the dust baffle and the inner peripheral wall of the dust collection cylinder, and then falls to the dust collection component at the dust collection port at the bottom of the dust collection cylinder, thus achieving preliminary dust separation.

[0008] Because there is an airflow gap between the dust baffle and the filter element, the airflow can carry the remaining dust through this gap to the filter element for further filtration, thus improving filtration efficiency and effectiveness. At the same time, the inclined dust baffle reduces the amount of dust rising from below to the filter element, ensuring the normal operation and service life of the filter element, and effectively reducing secondary pollution caused by dust rising, thereby improving the dust collection and removal effect of the entire grinding dust collection device.

[0009] An installation plate is installed inside the vacuum cleaner cylinder, and the filter element is installed below the installation plate. A dust removal component is installed inside the filter element, and a drive component is installed on the installation plate to drive the dust removal component to rotate around the filter element's axis. This enables dust removal of the filter element, ensuring its normal use and the vacuum cleaner's suction effect. As the drive source drives the rotating shaft to rotate, it drives the paddle to vibrate the filter element, causing the dust accumulated on the outer wall of the filter element to shake off and fall into the dust collection port below for collection. During the dust removal process, when subjected to pressure, the paddle will retract, but the elastic element will return the paddle mounting seat to its original position, thus achieving elastic paddle movement. Compared with ordinary rigid connections, this reduces the damage to the filter element caused by the paddle. At the same time, the combination of paddle movement and elastic return also helps to ensure the vibration force and frequency of the paddle on the filter element, ensuring the effectiveness of dust removal. Since some of the shaken dust will be re-adsorbed onto the filter element due to the airflow when the vacuum cleaner cylinder is working, the rotating shaft can continue to rotate when vacuuming stops, thereby causing more dust to fall off.

[0010] Preferably, the spacing of the airflow gaps decreases sequentially from top to bottom.

[0011] By adopting the above technical solution, the main advantage is that it can further constrain and guide the airflow entering the dust collection cylinder, so that the airflow passes through the filter element more concentratedly, thereby improving the filtration efficiency of the filter element. At the same time, it can also better guide the dust to fall into the dust collection component through the annular dust collection channel, reducing the residue and upward movement of dust in the dust collection cylinder.

[0012] Preferably, the dust collection cylinder includes an upper cylinder, a middle cylinder, and a lower cylinder from top to bottom. The filter element is installed in the middle cylinder, and the connector and dust baffle are both located in the lower cylinder. A flipping component is provided between the middle cylinder and the lower cylinder, and the middle cylinder is flipped and installed at the opening of the lower cylinder via the flipping component.

[0013] By adopting the above technical solution, the dust collection cylinder is divided into an upper cylinder, a middle cylinder, and a lower cylinder, which facilitates the functional settings and operation of different parts; the filter element is installed in the middle cylinder, and the middle cylinder can be flipped and installed at the opening of the lower cylinder through a flipping component, which facilitates the maintenance and replacement of the filter element.

[0014] Preferably, the paddle includes a fixing portion connected to the paddle mounting base and an abutting portion for contacting the filter element, the abutting portion being made of plastic material.

[0015] By adopting the above technical solution, the deflector includes a fixing part and an abutting part. The abutting part is made of plastic material, which is more durable than other materials and helps to reduce damage to the filter element during the dust removal process.

[0016] Preferably, the paddle mounting base has a through arc-shaped groove, and the mounting main base has a limiting shaft passing through the arc-shaped groove, the limiting shaft being slidably connected to the arc-shaped groove.

[0017] By adopting the above technical solution, during the dust removal process, the paddle mounting base, based on the cooperation of the arc groove and the limiting shaft, makes the paddle elastically paddle during the dust removal process. Compared with the ordinary rigid connection method, this can effectively reduce the damage of the paddle to the filter element. At the same time, the paddle combined with elastic reset method is also conducive to ensuring the vibration force and frequency of the paddle on the filter element, thus ensuring the effectiveness of dust removal.

[0018] Preferably, the dust collection cylinder is provided with an opening and closing component at the dust collection port, and the opening and closing component automatically opens and closes based on the weight of the dust.

[0019] By adopting the above technical solution, an opening and closing component based on the weight of the dust is installed at the dust discharge port to automatically discharge the dust collected in the dust collection cylinder periodically. This reduces the likelihood of dust rising from the dust collection box and affecting the dust removal effect due to the accumulation of large amounts of dust in the dust collection cylinder over a long period of time. Because of this opening and closing component, dust removal operations can also be performed without stopping the grinding and dust collection device.

[0020] Preferably, the opening and closing assembly includes a baffle, a first elastic plate, a second elastic plate, and a valve plate. The baffle and the valve plate are arranged at an inclined downward. The baffle is connected to the dust collection cylinder. The upper end of the first elastic plate is rotatably connected to the baffle and fixedly connected to the valve plate. The lower end of the second elastic plate is connected to the first elastic plate. The upper end of the second elastic plate abuts against the lower surface of the valve plate. The free end of the valve plate covers the dust collection port.

[0021] By adopting the above technical solution, an opening and closing assembly consisting of a baffle, a first elastic plate, a second elastic plate, and a valve plate is installed at the dust collection port. The valve plate and the baffle are inclined downwards, with the free end of the valve plate covering the dust collection port. The first elastic plate connects to the valve plate, and the second elastic plate abuts against the lower surface of the valve plate. When the weight of dust on the valve plate reaches a certain threshold, the valve plate elastically deforms and presses down to overcome the supporting force of the second elastic plate, opening the dust collection port. After the dust falls into the dust collection component, the elastic force of the second elastic plate supports the valve plate to reset and close the dust collection port. This allows for periodic automatic dust collection in the dust collection cylinder, reducing the problem of dust easily rising in the dust collection cylinder due to long-term accumulation of large amounts of dust, which affects the dust cleaning effect. Because of this opening and closing assembly, dust cleaning operations can also be performed without stopping the machine.

[0022] Preferably, the top of the dust collection cylinder is provided with a first ventilation port, and the dust collection cylinder is provided with a lever seat and a lever for driving the lever seat to open and close at the first ventilation port. By opening and closing the lever seat, the first ventilation port can be opened to facilitate air intake and reverse air blowing to remove dust.

[0023] By adopting the above technical solution, setting up a lever seat and lever to control the opening and closing of the first ventilation port, the first ventilation port can be opened, which is conducive to air intake and realizes reverse blowing to remove ash.

[0024] In summary, this application has the following beneficial effects:

[0025] 1. By installing a dust baffle, the dust baffle combined with the filter element can improve the dust removal effect and reduce the amount of dust rising from below to the filter element;

[0026] 2. By incorporating a dust removal component, the elastic movement of the dust removal component's paddles during dust removal reduces damage to the filter element and ensures effective dust removal.

[0027] 3. The disc valve assembly can automatically and periodically remove ash from the lower cylinder, reducing dust rising and affecting the cleaning effect. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0029] Figure 2 This is a schematic diagram of the internal structure of the vacuum cleaner cylinder in an embodiment of this application;

[0030] Figure 3 This is a schematic diagram of the internal structure of the upper cylinder in an embodiment of this application;

[0031] Figure 4 This is a top view of the filter element in the embodiments of this application;

[0032] Figure 5 This is a schematic diagram of the structure of the dust removal component in the embodiments of this application;

[0033] Figure 6 This is a schematic diagram of the opening and closing components in the embodiments of this application.

[0034] Explanation of reference numerals in the attached drawings: 1. Frame; 2. Dust collection cylinder; 21. Upper cylinder; 211. First vent; 212. Paddle seat; 213. Paddle lever; 22. Middle cylinder; 221. Filter element; 222. Mounting plate; 223. Second vent; 224. Screw; 225. First nut; 23. Lower cylinder; 231. Connector; 232. Air inlet; 233. Dust baffle; 234. Annular dust collection channel; 235. Airflow gap; 236. Discharge pipe; 237. Dust collection port; 238. Dust collection component; 24. Fastener; 25. Tilting component; 26. Exhaust valve. Components; 261, extraction pipe; 262, generator; 3, dust removal assembly; 31, mounting base; 311, limit shaft; 32, paddle mounting base; 321, arc groove; 322, slot; 33, paddle; 331, fixing part; 332, abutting part; 34, elastic element; 35, fixing part; 351, bolt; 352, second nut; 4, drive assembly; 41, rotating shaft; 42, drive source; 43, rotating bracket; 5, opening and closing assembly; 51, baffle; 52, first elastic plate; 521, connecting part; 53, second elastic plate; 54, valve plate. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1 -Appendix Figure 6 This application will be described in further detail below.

[0036] This application discloses a grinding and dust collection device.

[0037] Example 1:

[0038] A grinding and dust collection device, as described in the following text Figure 1 , Figure 2 The system includes a frame 1 and a vacuum cleaner cylinder 2 mounted on the frame 1. A push handle is provided on the frame 1 for pushing. In this embodiment, the vacuum cleaner cylinder 2 comprises, from top to bottom, an upper cylinder 21, a middle cylinder 22, and a lower cylinder 23. The upper cylinder 21 is detachably connected to the middle cylinder 22, specifically via latches 24. Several latches 24 are spaced apart around the axis of the upper cylinder 21. A flipping element 25 is provided between the middle cylinder 22 and the lower cylinder 23, allowing the middle cylinder 22 to be flipped and mounted at the opening of the lower cylinder 23. The flipping element 25 is specifically a hinge seat. Hooks 24 are also provided between the middle cylinder 22 and the lower cylinder 23, with several latches 24 spaced apart around the axis of the lower cylinder 23. When maintenance personnel need to maintain or replace the filter element 221, they can easily flip the middle cylinder 22 open to directly access the filter element 221 without a complicated disassembly process, which greatly improves the maintenance and replacement efficiency of the filter element 221.

[0039] The upper cylinder 21 has an exhaust component 26 installed on its side wall. The exhaust component 26 specifically includes an exhaust pipe 261 fixedly inserted through the side wall of the upper cylinder 21, a fan connected to the exhaust pipe 261, and a generator 262 that provides power to the fan. The generator 262 is fixedly connected to the frame 1. It should be noted that the generator 262 can use a propane-fueled engine to power the fan. Compared to a generator 262 directly driven by mains power, this allows for easier movement and reduces the inconvenience caused by cables. The top of the upper cylinder 21 is provided with a first ventilation opening 211. The upper cylinder 21 is provided with a lever seat 212 and a lever 213 for driving the lever seat 212 to open and close at the first ventilation opening 211. One side of the lever seat 212 is hinged to the outer top wall of the upper cylinder 21. The lever 213 is set in an L-shape and is fixedly connected to the lever seat 212. By opening and closing the lever seat 212, the first ventilation opening 211 of the upper cylinder 21 can be opened to facilitate air intake and reverse air blowing to remove ash.

[0040] Reference Figure 2 , Figure 3 The middle cylinder 22 contains a filter element 221, which is an inverted cone. The upper end of the middle cylinder 22 is fixedly connected to an mounting plate 222. The mounting plate 222 is fixed inside the middle cylinder 22 by bolts or welding, depending on the requirements. The mounting plate 222 has a second ventilation port 223 through it, and several second ventilation ports 223 are arranged at intervals around the axis of the mounting plate 222. The filter element 221 is installed below the mounting plate 222, specifically via a screw 224 and a first nut 225. The screw 224 is fixedly connected to the upper end of the filter element 221. Several screws 224 are provided and spaced apart around the axis of the filter element 221. The screws 224 pass through the mounting plate 222 and extend into the upper cylinder 21. The screws 224 are threadedly connected to the first nut 225, which abuts against the upper surface of the mounting plate 222, thereby installing the filter element 221 onto the mounting plate 222.

[0041] Reference Figure 3 , Figure 4 The filter element 221 is provided with a dust removal component 3, and the mounting plate 222 is provided with a drive component 4 for driving the dust removal component 3 to rotate around the axis of the filter element 221.

[0042] Reference Figure 4 , Figure 5Specifically, the dust removal assembly 3 includes a mounting base 31 fixedly connected to the lower end of the rotating shaft 41, a paddle mounting base 32 rotatably connected to the mounting base 31, a paddle 33 disposed on the paddle mounting base 32, and an elastic element 34 that drives the paddle mounting base 32 to elastically reset. In this embodiment, the mounting base 31 is generally made of hard metal and is fixed to the lower end of the rotating shaft 41 by key connection or interference fit to ensure stability during rotation. The paddle mounting base 32 is rotatably connected to the mounting base 31 by bearings and can rotate flexibly relative to the mounting base 31. The paddle mounting base 32 has an arc-shaped groove 321 through it. The mounting base 31 has a limiting shaft 311 passing through the arc-shaped groove 321. The limiting shaft 311 is slidably connected to the arc-shaped groove 321. Through the cooperation of the arc-shaped groove 321 and the limiting shaft 311, the rotation range of the paddle mounting base 32 is limited.

[0043] The paddle 33 is used to contact the inner circumferential surface of the filter element 221. The paddle 33 is specifically installed on the paddle mounting base 32 by means of fasteners 35. Two fasteners 35 are arranged at intervals along the length of the paddle 33. In this embodiment, the fasteners 35 specifically include bolts 351 and second nuts 352. The paddle mounting base 32 has a slot 322 for inserting the paddle 33. The bolts 351 pass through the two side walls of the slot 322 and the paddle 33 of the paddle mounting base 32 and are fixed with the first nut to install the paddle 33 on the paddle mounting base 32.

[0044] The elastic element 34 is hinged at both ends to the mounting base 31 and the paddle mounting base 32, respectively. In this embodiment, the elastic element 34 is a tension spring. During this process, when the paddle 33 encounters resistance, the paddle mounting base 32 will rotate under the cooperation of the arc groove 321 and the limiting shaft 311, while the elastic element 34 is stretched. When the resistance disappears, the elastic element 34 drives the paddle mounting base 32 to elastically reset. This elastic paddle method can effectively reduce the damage of the paddle 33 to the filter element 221, while ensuring the cleaning force and frequency.

[0045] Furthermore, the paddle 33 includes a fixing part 331 connected to the paddle mounting base 32 and an abutting part 332 for contacting the filter element 221. The fixing part 331 is installed via a fixing member 35 and the paddle mounting base 32. In this embodiment, the abutting part 332 is made of a plastic material, such as polyurethane. This material has good flexibility and wear resistance, which can ensure the dust removal effect while reducing damage to the filter element 221 when in contact with it. It should be noted that the height of the abutting part 332 can be set to the same height as the fixing part 331, or the length of the abutting part 332 in the height direction can be set along the entire length of the generatrix of the filter element 221, or the dust removal assembly 3 can be arranged in several intervals along the axis of the filter element 221 to shake the filter element 221 at different height positions, depending on the requirements.

[0046] The drive assembly 4 includes a rotating shaft 41 that passes through the mounting plate 222 and extends into the filter element 221, and a drive source 42 that drives the rotating shaft 41 to rotate. The drive source 42 can be an electric motor, such as a DC motor or an AC motor, which can provide stable power. It is connected to the rotating shaft 41 through a coupling and drives the rotating shaft 41 to rotate. The electric motor is fixedly connected to the upper surface of the mounting plate 222.

[0047] Back Figure 2 The lower cylinder 23 has a connector 231 on its side wall for connecting to the suction pipe. The lower cylinder 23 has an air inlet 232 communicating with the connector 231. The lower end of the filter element 221 extends into the lower cylinder 23 and is positioned corresponding to the air inlet 232. A dust baffle 233 is installed inside the lower cylinder 23. The upper edge of the dust baffle 233 is fixedly connected to the inner wall of the lower cylinder 23 and can be fixed by welding. The dust baffle 233 is positioned below the filter element 221, corresponding to the front of the air inlet 232. The dust baffle 233 is arranged around the circumference of the filter element 221, and its surface is inclined from top to bottom towards the filter element 221. An annular dust collection channel 234 is formed between the dust baffle 233 and the inner peripheral wall of the lower cylinder 23 to allow dust to fall. An airflow gap 235 is left between the dust baffle 233 and the filter element 221. In this embodiment, the tilt angle of the dust baffle 233 is greater than that of the filter element 221, so the spacing of the airflow gap 235 decreases from top to bottom. This design allows the rising airflow velocity to gradually increase, which is more conducive to throwing dust in the dusty air toward the dust baffle 233, further improving the dust-blocking effect, and making it easier for dust to fall along the dust baffle 233 through the annular dust collection channel 234.

[0048] Reference Figure 2 , Figure 6The lower cylinder 23 is fixedly connected to a discharge pipe 236 at its bottom. A dust collection port 237 is provided on the discharge pipe 236. A dust collection component 238 is installed at the dust collection port 237 on the lower cylinder 23. This component typically uses a dust collection bag, which can be made of non-woven fabric for good air permeability and dust filtration, or a paper dust collection bag for lower cost and easier replacement. The dust collection component 238 is installed at the dust collection port 237 to collect the dust falling from it. The dust collection bag is coaxially sleeved on the discharge pipe 236 and is detachably connected to it. It can be fixed to the discharge pipe 236 using snap-fit ​​and clamp methods, or by using Velcro fasteners. The specific method is not limited to these, but depends on the requirements. This setup improves dust collection, filtration, and cleaning efficiency because the dust baffle 233 blocks some dust, causing it to fall centrifugally and reducing the burden on the filter element 221. At the same time, the annular dust collection channel 234 and the airflow gap 235 facilitate dust falling and air circulation.

[0049] Reference Figure 2 , Figure 6 Furthermore, an opening and closing assembly 5 is provided at the ash discharge port 237 of the cylinder. The opening and closing assembly 5 automatically opens and closes the ash discharge port 237 based on the weight of the dust. The opening and closing assembly 5 specifically includes a baffle 51, a first elastic plate 52, a second elastic plate 53, and a valve plate 54. The baffle 51 and the valve plate 54 are inclined downwards. The baffle 51 is fixedly connected to the discharge pipe 236. The first elastic plate 52 and the second elastic plate 53 are both located below the baffle 51. The upper end of the first elastic plate 52 is bent and connected to a connecting part 521. The connecting part 521 is rotatably connected to the lower surface of the baffle 51 through a hinge shaft and is fixedly connected to the valve plate 54. The upper end of the second elastic plate 53 abuts against the lower surface of the valve plate 54. The lower ends of the first elastic plate 52 and the second elastic plate 53 are fixedly connected. The free end of the valve plate 54 covers the ash discharge port 237.

[0050] The first elastic plate 52 and the second elastic plate 53 can be made of spring steel, which has good elasticity. The valve plate 54 is generally also made of metal, and its free end covers the ash discharge port 237. In the initial state, under the supporting force of the second elastic plate 53, the valve plate 54 is in the closed state of the ash discharge port 237.

[0051] When the weight of dust falling onto valve plate 54 reaches a certain threshold, valve plate 54 will elastically deform and press down, overcoming the supporting force of the second elastic plate 53, thereby opening the dust collection port 237 and allowing the dust to fall into the dust collection bag. Afterwards, as the dust falls, the weight on valve plate 54 decreases, and the elasticity of the second elastic plate 53 will support valve plate 54 to return to its original position, closing the dust collection port 237. In this way, the dust collected in the lower cylinder 23 can be automatically and periodically discharged, reducing the likelihood of dust easily rising from the dust collection cylinder 2 and affecting the dust removal effect due to long-term accumulation of large amounts of dust in the lower cylinder 23.

[0052] By utilizing the cooperation of the elastic plate and the valve plate 54, the dust discharge port 237 can be automatically opened and closed. This design can avoid excessive accumulation of dust in the lower cylinder 23, reduce the impact of dust rising on the dust removal effect, and also reduce manual intervention, improve the automation level and dust removal efficiency of the device, and solve the problem that existing dust collection devices cannot automatically discharge dust.

[0053] The implementation principle of the grinding and dust collection device in this embodiment is as follows: Suction is generated by the suction component 26 to introduce dust-laden air. Dust is initially blocked by the dust baffle 233, then guided through a channel with a specially designed airflow gap 235. Finally, the air and dust are finely filtered by the filter element 221, and the dust is collected by the dust collection component 238. This structural design is reasonable and, compared with existing technologies, can more effectively improve dust collection and filtration efficiency, reduce filter element 221 clogging, solve the shortcomings of existing dust collection devices in dust filtration and cleaning, and greatly improve the practicality and working efficiency of the device.

[0054] The dust removal process utilizes the contact between the paddle 33 and the filter element 221. Through the design of the elastic structure, the damage to the filter element 221 caused by ordinary rigid connections can be reduced, thereby improving the dust removal effect and the service life of the filter element 221. This solves the problems of difficult dust removal and easy damage to the filter element 221 in the prior art, and further enhances the performance and reliability of the device.

[0055] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A grinding and dust collection device, characterized in that: The system includes a vacuum tube (2), with an air extraction component (26) at the top. The vacuum tube (2) contains a filter element (221). A connector (231) for connecting to a vacuum hose is provided on the side wall of the vacuum tube (2). The vacuum tube (2) has an air inlet (232) communicating with the connector (231). An installation plate (222) is provided inside the vacuum tube (2). A second ventilation port (223) is provided through the installation plate (222). Several second ventilation ports (223) are spaced around the axis of the installation plate (222). The filter element (221) is installed below the installation plate (222). A dust removal assembly (3) is provided inside the filter element (221). A drive assembly (4) is provided on the installation plate (222) to drive the dust removal assembly (3) to rotate around the axis of the filter element (221). The drive assembly (4) includes components that pass through the installation plate. (222) and extends into the filter element (221) a rotating shaft (41) and a drive source (42) for driving the rotating shaft (41) to rotate. The dust removal assembly (3) includes a mounting base (31) fixedly connected to the lower end of the rotating shaft (41), a paddle mounting base (32) rotatably connected to the mounting base (31), a paddle (33) provided on the paddle mounting base (32), and an elastic element (34) that drives the paddle mounting base (32) to elastically reset. The paddle (33) contacts the inner circumferential surface of the filter element (221). The two ends of the elastic element (34) are respectively hinged to the mounting base (31) and the paddle mounting base (32). The paddle mounting base (32) is provided with an arc-shaped groove (321) through it. The mounting base (31) is provided with a limiting shaft (311) passing through the arc-shaped groove (321). The limiting shaft (311) is slidably connected to the arc-shaped groove (321). A dust baffle (233) is provided inside the dust collection cylinder (2). The dust baffle (233) is located below the filter element (221) and is positioned in front of the air inlet (232). The dust baffle (233) is arranged around the circumference of the filter element (221). The surface of the dust baffle (233) is inclined from top to bottom towards the filter element (221). An annular dust collection channel (234) is formed between the dust baffle (233) and the inner circumferential wall of the dust collection cylinder (2) for dust to fall. An airflow gap (235) is left between the dust baffle (233) and the filter element (221). A dust collection port (237) is provided at the bottom of the dust collection cylinder (2). A dust collection component (238) is provided at the dust collection port (237) of the dust collection cylinder (2). The dust collection cylinder (2) includes an upper cylinder (21), a middle cylinder (22) and a lower cylinder (23) from top to bottom. The filter element (221) is installed inside the middle cylinder (22). The connector (231) and the dust baffle (233) are both located in the lower cylinder (23). A flipping component (25) is provided between the middle cylinder (22) and the lower cylinder (23). The middle cylinder (22) is flipped and installed at the opening of the lower cylinder (23) via the flipping component (25).

2. The grinding and dust collection device according to claim 1, characterized in that: The spacing of the airflow gaps (235) decreases sequentially from top to bottom.

3. The grinding and dust collection device according to claim 1, characterized in that: The paddle (33) includes a fixing part (331) connected to the paddle mounting base (32) and an abutting part (332) for contacting the filter element (221), the abutting part (332) being made of plastic material.

4. The grinding and dust collection device according to claim 1, characterized in that: The dust collection tube (2) is provided with an opening and closing component (5) at the dust collection port (237), and the opening and closing component (5) automatically opens and closes the dust collection port (237) based on the weight of the dust.

5. A grinding and dust collection device according to claim 4, characterized in that: The opening and closing assembly (5) includes a baffle (51), a first elastic plate (52), a second elastic plate (53), and a valve plate (54). The baffle (51) and the valve plate (54) are inclined downwards. The baffle (51) is connected to the dust collection cylinder (2). The upper end of the first elastic plate (52) is rotatably connected to the baffle (51) and fixedly connected to the valve plate (54). The lower end of the second elastic plate (53) is connected to the first elastic plate (52). The upper end of the second elastic plate (53) abuts against the lower surface of the valve plate (54). The free end of the valve plate (54) covers the dust collection port (237).

6. A grinding dust collection device according to claim 5, characterized in that: The top of the dust collection tube (2) is provided with a first vent (211). The dust collection tube (2) is provided with a paddle seat (212) and a lever (213) for driving the paddle seat (212) to open and close. By opening and closing the paddle seat (212), the first vent (211) can be opened to facilitate air intake and reverse air blowing to remove dust.

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