A dust channel anti-static grinding machine and its use method

Abstract

The invention relates to a grinder with anti-static dust channel, comprising a casing, a fan blade, a motor arranged on the inner side of the casing, a protective cover arranged in the lower end of the casing, and a grinding disc arranged in the protective cover and driven to rotate by the motor. A fan blade cavity is opened in the casing, a dust suction pipe is arranged between the fan blade cavity and the protective cover, and the casing is further provided with a powder outlet channel connected to the fan blade cavity on one side of the fan blade cavity. A conductive lining portion is provided in the fan blade cavity and the powder outlet channel, and the lining portion is attached to the inner side of the fan blade cavity and the powder outlet channel, isolating the plastic channel that is prone to static electricity on the outside of the lining portion, thereby avoiding static electricity from being generated in the plastic channel. The conductive lining portion is less likely to generate static electricity than the original plastic channel. Even if static electricity is generated, the lining portion with static electricity is isolated from the outside through the plastic channel. Moreover, the lining portion is installed on the inner side of the original fan blade cavity and the powder outlet channel, so there is no need to develop and design the internal structure of the grinder, which greatly reduces the production cost.

Description

Technical Field

[0001] The present invention relates to the technical field of grinders, in particular to a grinder with an anti-static dust channel. Background Art

[0002] In the existing technology, the dust channel of the grinder is integrated with the plastic casing. When the grinder is grinding, a large amount of dust is sucked into the inside of the grinder at high speed under the action of the fan blades, and rubs against the casing wall under the action of centrifugal force, thereby generating very large static electricity and high-voltage static electricity outside the plastic casing, which in turn causes electric shock to the operator during operation, affecting the normal use of the machine.

[0003] The patent application number is CN201911249636.9, which is an intelligent self-dust suction grinding and polishing terminal device. The device includes a self-dust suction eccentric grinder and a pneumatic robotic arm; an active adaptive flange assembly, one end flange of which is connected to the pneumatic robotic arm, and the other end flange is connected to the self-dust suction eccentric grinder; when working, the active adaptive flange assembly maintains a constant pressure between the flanges at both ends according to a preset pressure value. The invention eliminates static electricity by setting an ion generator and a fan, but the ion generator and the additional fan occupy a large volume and have a complex structure. More importantly, the existing structure of the grinder needs to be redeveloped and designed to complete the installation of the ion generator and the fan, which greatly increases the production cost. Summary of the Invention

[0004] The present invention aims to solve the problems existing in the above-mentioned prior art and provides a dust channel anti-static grinder. The device has a reasonable structural design. By arranging a conductive lining in the existing dust suction pipe, the generation of static electricity is reduced. At the same time, there is no need to redevelop and design the existing grinder structure, which greatly reduces the production cost of the factory.

[0005] The present invention solves its technical problem by adopting a technical solution: this dust channel anti-static grinder includes a casing, a fan blade, a motor arranged on the inner side of the casing, a protective cover arranged in the lower end of the casing, and a grinding disc arranged in the protective cover and driven to rotate by the motor. A fan blade cavity for installing the fan blade is opened in the casing, a dust suction pipe is arranged between the fan blade cavity and the protective cover, and the casing is further provided with a powder outlet channel connected to the fan blade cavity on one side of the fan blade cavity. The fan blade cavity and the powder outlet channel are provided with a conductive lining portion, the lining portion is attached to the inner side of the fan blade cavity and the powder outlet channel, and is provided with a conductive lining portion that is attached to the fan blade cavity and the powder outlet channel, and is attached to the fan blade cavity and the powder outlet channel. The conductive inner lining on the inner side of the cavity and powder outlet channel isolates the plastic channel that is prone to generating static electricity outside the inner lining, thereby preventing the plastic channel from generating static electricity. The conductive inner lining is less likely to generate static electricity than the original plastic channel. Even if static electricity is generated, the inner lining with static electricity is isolated from the outside world and the operator through the plastic channel, thereby preventing the operator from being electrocuted by static electricity. In addition, the inner lining is installed on the inner side of the fan cavity and powder outlet channel originally designed in the shell, eliminating the need to develop and design the internal structure of the grinder, greatly reducing production costs.

[0006] The inner side of the blade cavity of the original structure grinder will cause rapid wear of the inner wall due to the long-term impact of high-speed dust, which will lead to poor dust outflow from the grinder, and in severe cases will cause the grinder to be scrapped. In this application, an inner lining is added to the original grinder structure. While avoiding the generation of static electricity in the grinder, the wear of the inner lining can also replace the wear of the blade cavity. At the same time, when the inner lining is severely worn and the blade cavity is exposed, the grinder casing will come into contact with the dust again to generate static electricity. The user can judge whether the internal lining is damaged by whether static electricity is generated outside the casing, and can then replace it in time.

[0007] In order to further improve it, the casing includes a left half shell and a right half shell that are spliced ​​together, the lining part includes a left lining and a right lining that are spliced ​​together, the upper end of the left lining is provided with a pin corresponding to the right lining, and the upper end of the right lining is provided with a socket corresponding to the pin, the lining part includes a protective part located outside the fan blade and fit with the inner wall of the fan blade cavity, and a pipe part located in the powder outlet channel and fit with the inner wall of the powder outlet channel. The protective part and the pipe part are connected by a slot, and the casing and the lining part are designed to be spliced ​​together on the left and right sides, so that when the lining part needs to be disassembled and replaced, it is only necessary to open the left and right half shells accordingly, and then replace the protective part or the pipe part in the corresponding left and right liners according to needs. By removing the lining part It is divided into multiple parts that are spliced ​​together, so that when replacing the lining part, only the corresponding damaged part needs to be replaced, which reduces the production cost of the corresponding consumables and avoids waste of materials. When the fan blades rotate counterclockwise, the dust suction duct is opened on the inner side of the right half shell and is located at the center of the upper end of the fan blade cavity, and the motor is fixedly connected to the right half shell. After the dust enters the fan blade cavity through the dust suction duct, the dust hits the left lining on the inner side of the left half shell under the action of centrifugal force, so that the wear is concentrated on the left lining. Therefore, when replacing the lining part, it is only necessary to disassemble the casing in half, and then take out the protective part of the left lining in the left half shell and replace it separately. Conversely, when the fan blades rotate clockwise, the opposite setting is adopted.

[0008] Further improvement, a dust suction channel is formed on the inner side of the protective part and the outer side of the fan blade, the dust suction channel is gradually increased along the rotation direction of the fan blade from the center position of the lower end, a connection hole connected to the pipe part is opened at the tail end of the dust suction channel, and the dust suction channel formed between the protective part and the fan blade is gradually increased along the rotation direction of the fan blade, so that the dust flows along the dust suction channel under the action of the fan blade, and then when it flows to the center position of the lower end, the distance between the fan blade and the protective part is small, that is, the dust suction channel at the corresponding position is small, so that most of the dust has no dust when it flows to the tail end of the dust suction channel. The dust cannot re-enter the circulation through the smaller dust suction channel and can only flow into the pipe part through the connecting hole and then be discharged through the pipe part. In the present application, since an inner lining part is provided in the fan blade cavity, the original channel between the fan blade cavity and the fan blade is adjusted to a dust suction channel between the inner lining part and the fan blade. Moreover, since the inner lining part has a simple structure and a small size and the inner lining part can be designed as an opening and closing form of left and right splicing, it is easier and more convenient to process the inner lining part to realize a structure in which the dust suction channel gradually increases than processing the fan blade cavity, and the processing accuracy is higher, thereby greatly improving the production efficiency and production quality.

[0009] To be further improved, a concave area is provided on the outside of the inner lining, a positioning part is provided on the inside of the concave area, a positioning hole is provided on the inside of the positioning part, and a positioning protrusion fixedly connected to the powder outlet channel is provided on the inside of the positioning hole. The positioning part and the positioning protrusion are provided to facilitate accurate installation and positioning of the inner lining, thereby avoiding shaking or movement of the inner lining due to processing errors in other parts.

[0010] Moreover, in this application, since the inner lining is made of conductive material, the inner lining can also be connected to the grounding terminal of the grinder plug through a wire or directly grounded through a grounding wire, thereby directly removing the static electricity generated on the inner lining, making the use of the device safer.

[0011] For further improvement, a process groove is opened on the side of the left lining and the right lining away from the fan blades. The left lining and the right lining are provided with the process groove. First, the manufacturing material of the lining part can be reduced, thereby reducing the manufacturing cost of the lining part; secondly, the process groove can reduce the contact area with the fan blade cavity, thereby reducing the mutual influence caused by the processing error of the lining part piston fan blade cavity, thereby ensuring that the installation position of the lining part is more accurate.

[0012] A method for using a dust channel anti-static grinder comprises the following steps:

[0013] 1) Dust collection: Turn on the grinder, and the motor drives the fan blades and the grinding disc at the lower end to rotate. The rotation of the fan blades causes the air to drive the dust generated by the grinding disc into the inner side of the fan blade cavity through the dust collection duct. Under the action of the fan blades, the dust-laden air impacts the protective part inside the fan blade cavity. Then, under the guidance of the lining part, the dust-laden air is guided into the inner side of the pipe part, and finally discharged and collected through the pipe connected to the powder outlet channel;

[0014] 2) Replace the inner lining: When static electricity appears again on the outside of the grinder casing, it means that the inner lining is damaged and needs to be replaced. At this time, split the casing into left and right half shells, and then take out the left lining or right inner lining at the corresponding position for replacement.

[0015] The beneficial effects of the present invention are: the present invention has a reasonable structural design and is easy to install. It is provided with a conductive lining part that fits and wraps around the inner side of the fan blade cavity and the powder outlet channel, and isolates the plastic channel that is prone to generating static electricity on the outside of the lining part, thereby avoiding the plastic channel from generating static electricity. The conductive lining part is less likely to generate static electricity than the original plastic channel. Even if static electricity is generated, the lining part with static electricity is isolated from the outside world and from the operator through the plastic channel, thereby preventing the operator from being electrocuted by static electricity. Moreover, the lining part is installed on the inner side of the fan blade cavity and the powder outlet channel originally designed in the shell, and there is no need to develop and design the internal structure of the grinder, which greatly reduces the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the installation of the protective cover and the grinding disc;

[0018] Figure 3 Schematic diagram of the internal structure of the present invention;

[0019] Figure 4 It is a structural diagram of the right half shell;

[0020] Figure 5 This is a schematic diagram of the installation of the right half shell, protective part and pipeline part;

[0021] Figure 6 It is a structural schematic diagram of the left lining and the right lining;

[0022] Figure 7 This is a connection diagram of the protection part and the pipeline part;

[0023] Figure 8 It is a top view of the fan blades and lining.

[0024] Explanation of the accompanying drawings: 1. Casing, 1-1 left half shell, 1-2 right half shell, 2. Fan blade, 3. Motor, 4. Protective cover, 5. Grinding disc, 6. Fan blade chamber, 7. Dust suction duct, 8. Powder discharge channel, 9. Lining part, 9-1 left lining, 9-2 right lining, 10. Pin, 11. Socket, 12. Protective part, 13. Pipe part, 14. Slot, 15. Dust suction channel, 16. Connecting hole, 17. Concave area, 18. Positioning part, 19. Positioning hole, 20. Positioning protrusion, 21. Process groove. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the accompanying drawings:

[0026] Referring to the accompanying drawings: In this embodiment, a dust channel anti-static grinder includes a casing 1, a fan blade 2, a motor 3 arranged on the inner side of the casing 1, a protective cover 4 arranged in the lower end of the casing 1, and a grinding disc 5 arranged in the protective cover 4 and driven to rotate by the motor. A fan blade cavity 6 for installing the fan blade 2 is opened in the casing 1, and a dust suction pipe 7 is provided between the fan blade cavity 6 and the protective cover 4. The casing 1 is also provided with a powder outlet channel 8 connected to the fan blade cavity 6 on one side of the fan blade cavity 6. The fan blade cavity 6 and the powder outlet channel 8 are provided with a conductive lining portion 9, and the lining portion 9 is attached to the inner side of the fan blade cavity 6 and the powder outlet channel 8, and is provided with a fitting wrapping The conductive inner lining 9 on the inner side of the blade cavity 6 and the powder outlet channel 8 isolates the plastic channel that is prone to generating static electricity on the outside of the inner lining 9, thereby preventing the plastic channel from generating static electricity. The conductive inner lining 9 is less likely to generate static electricity than the original plastic channel. Even if static electricity is generated, the inner lining 9 with static electricity is isolated from the outside world and the operator through the plastic channel, thereby preventing the operator from being electrocuted by static electricity. Moreover, the inner lining 9 is installed on the inner side of the blade cavity 6 and the powder outlet channel 8 originally designed in the housing 1, and there is no need to develop and design the internal structure of the grinder, which greatly reduces the production cost.

[0027] The inner side of the blade cavity 6 of the original structure grinder will cause rapid wear of the inner wall due to the long-term impact of high-speed dust, which will lead to the obstruction of dust outflow from the grinder, and in severe cases, the grinder will be scrapped. In this application, an inner lining part 9 is added to the original grinder structure. While avoiding the generation of static electricity in the grinder, the wear of the inner lining part 9 can also replace the wear of the blade cavity 6. At the same time, when the inner lining part 9 is severely worn and the blade cavity 6 is exposed, the casing 1 of the grinder will come into contact with the dust again to generate static electricity. The user can judge whether the internal lining part 9 is damaged by whether static electricity is generated outside the casing 1, and can then replace it in time.

[0028] like Figure 1-8 As shown, the casing 1 includes a left half shell 1-1 and a right half shell 1-2 that are spliced ​​together, the lining portion 9 includes a left lining 9-1 and a right lining 9-2 that are spliced ​​together, the upper end of the left lining 9-1 is provided with a latch 10 corresponding to the right lining 9-2, and the upper end of the right lining 9-2 is provided with a socket 11 corresponding to the latch 10, the lining portion 9 includes a protective portion 12 located on the outside of the fan blade 2 and in contact with the inner wall of the fan blade cavity 6, and a pipe portion 13 located in the powder outlet channel 8 and in contact with the inner wall of the powder outlet channel 8. The protective portion 12 and the pipe portion 13 are connected by a slot 14. The casing 1 and the lining portion 9 are designed to be spliced ​​together on the left and right sides, so that when the lining portion 9 needs to be disassembled and replaced, it is only necessary to open the left and right half shells accordingly, and then replace the protective portion 12 or the pipe portion 1 in the corresponding left and right liners according to needs. 3. By dividing the lining portion 9 into a plurality of mutually connected parts, when replacing the lining portion 9, only the corresponding damaged part needs to be replaced, which reduces the production cost of the corresponding consumables and avoids waste of materials. When the fan blades rotate counterclockwise, the dust suction duct 7 is opened on the inner side of the right half shell 1-2 and is located at the upper center position of the fan blade cavity 6, and the motor 3 is fixedly connected to the right half shell 1-2. After the dust enters the fan blade cavity 6 through the dust suction duct 7, the dust hits the left lining on the inner side of the left half shell 1-1 under the action of centrifugal force, so that the wear is concentrated on the left lining 9-1. Therefore, when replacing the lining portion 9, it is only necessary to disassemble the casing 1 in half, and then take out the protective part 12 of the left lining 9-1 in the left half shell 1-1 and replace it separately. On the contrary, when the fan blades rotate clockwise, the opposite setting is adopted.

[0029] like Figure 8As shown, a dust collection channel 15 is formed on the inner side of the protective portion 12 and the outer side of the fan blade 2. The dust collection channel 15 is gradually enlarged from the center position of the lower end along the rotation direction of the fan blade 2. A connecting hole 16 connected to the pipe portion 13 is opened at the tail end of the dust collection channel 15. The dust collection channel 15 formed between the protective portion 12 and the fan blade 2 is gradually enlarged along the rotation direction of the fan blade 2, so that the dust flows along the dust collection channel 15 under the action of the fan blade 2. When it flows to the center position of the lower end, the distance between the fan blade 2 and the protective portion 12 is small, that is, the dust collection channel 15 at the corresponding position is small, so that most of the dust flows to the tail end of the dust collection channel 15. When the dust is discharged, it cannot re-enter the circulation through the smaller dust suction channel 15 and can only flow into the pipe part 13 through the connecting hole 16, and then be discharged through the pipe part 13. In this application, since the lining part 9 is provided in the fan blade cavity 6, the original channel between the fan blade cavity 6 and the fan blade 2 is adjusted to the dust suction channel 15 between the lining part 9 and the fan blade 2. Moreover, since the lining part 9 has a simple structure and a small size and the lining part 9 can be designed as an opening and closing form of left and right splicing, it is easier and more convenient to process the lining part 9 to realize the gradually enlarged structure of the dust suction channel 15 than to process the fan blade cavity 6, and the processing accuracy is higher, thereby greatly improving the production efficiency and production quality.

[0030] like Figure 4 and 7 As shown, the outer side of the lining portion 9 is provided with an inner concave area 17, the inner side of the inner concave area 17 is provided with a positioning portion 18, the inner side of the positioning portion 18 is provided with a positioning hole 19, and the inner side of the positioning hole 19 is provided with a positioning protrusion 20 fixedly connected to the powder outlet channel 8. The positioning portion 18 and the positioning protrusion 20 are provided to facilitate the precise installation and positioning of the lining portion 9, and avoid the lining portion 9 from shaking or moving due to processing errors in other parts.

[0031] Moreover, in this application, since the lining part 9 is made of a conductive material, the lining part 9 can also be connected to the grounding terminal of the grinder plug through a wire or directly grounded through a grounding wire, thereby directly removing the static electricity generated on the lining part 9, making the use of the device safer.

[0032] like Figure 5 and 6 As shown, a process groove 21 is opened on the side of the left lining 9-1 and the right lining 9-2 away from the fan blades. The left lining 9-1 and the right lining 9-2 are provided with the process groove 21. First, the manufacturing material of the lining part 9 can be reduced, thereby reducing the manufacturing cost of the lining part 9; secondly, the process groove 21 can reduce the contact area with the fan blade cavity 6, thereby reducing the mutual influence caused by the processing error of the lining part 9 piston fan blade cavity 6, thereby ensuring that the installation position of the lining part 9 is more accurate.

[0033] A method for using a dust channel anti-static grinder comprises the following steps:

[0034] 1) Dust collection: Turn on the grinder, and the motor 3 starts to rotate the fan blades 2 and the grinding disc 5 at the lower end. The rotation of the fan blades 2 causes the air to drive the grinding disc 5 to generate dust that is sucked into the inner side of the fan blade cavity 6 through the dust collection duct 7. Under the action of the fan blades 2, the dust-laden air hits the protective portion 12 inside the fan blade cavity 6. Then, under the guidance of the lining portion 9, the dust-laden air is guided into the inner side of the pipe portion 13, and finally discharged and collected through the pipeline connected to the powder outlet channel 8.

[0035] 2) Replace the inner lining: When static electricity appears again on the outside of the grinder casing 1, it means that the inner lining 9 is damaged and needs to be replaced. At this time, the casing 1 is disassembled into the left half shell 1-1 and the right half shell 1-2, and then the left inner lining 9-1 or the right inner lining 9-2 at the corresponding position is taken out for replacement.

[0036] Although the invention has been shown and described with reference to preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A dust channel anti-static grinding machine, comprising a housing (1), a fan blade (2), a motor (3) arranged inside the housing (1), a protective cover (4) arranged inside the lower end of the housing (1), and a grinding disc (5) arranged in the protective cover (4) and driven to rotate by the motor, wherein a fan blade cavity (6) for mounting the fan blade (2) is provided in the housing (1), a dust collection pipe (7) is provided between the fan blade cavity (6) and the protective cover (4), and a powder discharge channel (8) connected to the fan blade cavity (6) is further provided on one side of the fan blade cavity (6) of the housing (1), wherein the grinding machine is characterized in that: A conductive lining portion (9) is provided in the fan blade cavity (6) and the powder outlet channel (8), and the lining portion (9) is attached to the inner side of the fan blade cavity (6) and the powder outlet channel (8); The lining portion (9) comprises a protective portion (12) located outside the fan blade (2) and in contact with the inner wall of the fan blade cavity (6), and a pipe portion (13) located inside the powder outlet channel (8) and in contact with the inner wall of the powder outlet channel (8), wherein the protective portion (12) and the pipe portion (13) are connected via a slot (14); The inner side of the protective portion (12) and the outer side of the fan blade (2) form a dust suction channel (15), and the dust suction channel (15) is gradually enlarged along the rotation direction of the fan blade (2) from the rear end of the dust suction channel (15). The rear end of the dust suction channel (15) is provided with a connection hole (16) connected to the pipe portion (13). Dust flows along the dust suction channel (15) under the action of the fan blade (2), so that most of the dust cannot re-enter the circulation through the smaller dust suction channel (15) when it flows to the rear end of the dust suction channel (15) and can only flow into the pipe portion (13) through the connection hole (16), and then be discharged through the pipe portion (13); The outer side of the inner lining portion (9) is provided with an inner concave area (17), the inner side of the inner concave area (17) is provided with a positioning portion (18), the inner side of the positioning portion (18) is provided with a positioning hole (19), and the inner side of the positioning hole (19) is provided with a positioning protrusion (20) fixedly connected to the powder outlet channel (8); The lining portion (9) comprises a left lining (9-1) and a right lining (9-2) that are spliced ​​together; a latch (10) corresponding to the right lining (9-2) is provided at the upper end of the left lining (9-1); and a socket (11) corresponding to the latch (10) is provided at the upper end of the right lining (9-2); and a process groove (21) is provided on the side of the left lining (9-1) and the right lining (9-2) away from the fan blades.

2. The dust channel anti-static grinding machine according to claim 1, characterized in that: The housing (1) comprises a left half shell (1-1) and a right half shell (1-2) which are spliced ​​and assembled with each other.

3. The dust channel anti-static grinding machine according to claim 1, characterized in that: The lining portion (9) is connected to a grounding wire.

4. The method for using the dust channel anti-static grinder according to claim 1 comprises the following steps: 1) Dust collection: Turn on the grinder, and the motor (3) drives the fan blade (2) and the grinding disc (5) at the lower end to rotate. The rotation of the fan blade (2) causes the air to drive the grinding disc (5) to generate dust that is sucked into the inner side of the fan blade cavity (6) through the dust collection pipe (7). Under the action of the fan blade (2), the dust-laden air impacts the protective portion (12) inside the fan blade cavity (6), and then, under the guidance of the lining portion (9), the dust-laden air is guided to the inner side of the pipe portion (13), and finally, the dust-laden air is discharged and collected through the pipeline connected to the powder outlet channel (8); 2) Replace the inner lining: When static electricity appears again on the outside of the grinding machine casing (1), it can be known that the inner lining (9) is damaged and needs to be replaced. At this time, the casing (1) is split into the left half shell (1-1) and the right half shell (1-2), and then the left inner lining (9-1) or the right inner lining (9-2) at the corresponding position is taken out for replacement.

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