A polishing apparatus with negative pressure dust collection

Abstract

This invention relates to the field of grinding equipment technology. It discloses a grinding device with negative pressure dust collection, comprising a frame, a grinding assembly, a negative pressure dust collection system, and a positioning and clamping assembly. The positioning and clamping assembly and the negative pressure dust collection system are integrated through a mechanical linkage structure, achieving coordinated control of clamping and dust collection. The positioning and clamping assembly is used for positioning, clamping, and selectively rotating the workpiece, working in conjunction with the grinding assembly to complete omnidirectional grinding operations. The grinding assembly uses a diamond grinding head, adaptable to the grinding needs of workpieces of different materials. The negative pressure dust collection system is equipped with a dust collection box and a primary filter, which can effectively filter grinding dust, protect the equipment, and improve the working environment. This equipment solves the problems of existing grinding equipment such as dispersed structure, poor coordination, serious dust pollution, and insufficient clamping accuracy. It has the advantages of strong adaptability, precise grinding, convenient operation, and environmental friendliness and efficiency, and is suitable for precision grinding operations on various workpieces.

Description

Technical Field

[0001] This invention relates to the field of polishing equipment technology, specifically to a polishing device with negative pressure dust suction. Background Technology

[0002] In precision manufacturing and parts processing, workpiece grinding is an indispensable process. The grinding accuracy and working environment directly affect product quality and the health of operators. Currently, grinding equipment on the market generally suffers from fragmented structures and poor coordination. The positioning and clamping components and negative pressure dust collection systems are mostly set up independently, making it impossible to achieve synchronous linkage between clamping and dust collection. This results in serious dust dispersion during grinding, which not only pollutes the workshop environment but also harms the respiratory system of operators. At the same time, dust can easily enter the equipment's interior, wear down parts, and shorten the equipment's service life.

[0003] Existing positioning and clamping components have many shortcomings. Most clamping mechanisms have poor adaptability, making it difficult to meet the clamping requirements of workpieces of different sizes and shapes. Moreover, problems such as workpiece displacement and surface scratches are prone to occur during clamping, affecting grinding accuracy. Some fixed components with rotation functions lack reliable limiting mechanisms, making them prone to accidental rotation and reducing operational stability. In addition, the dust collection systems of traditional grinding equipment have poor filtration effects and cannot effectively intercept fine dust. Long-term use can easily lead to negative pressure fan failure, increasing equipment maintenance costs.

[0004] With increasingly stringent environmental regulations and the need for industrial upgrading, the market demand for environmentally friendly, high-precision grinding equipment is becoming more and more urgent. Existing equipment struggles to balance grinding precision, ease of operation, and environmental friendliness, failing to meet the requirements of modern production for efficient, safe, and stable operation.

[0005] Based on this, a grinding device with negative pressure dust suction is invented to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a polishing device with negative pressure dust suction to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a polishing device with negative pressure dust collection, comprising a frame, a polishing assembly, a negative pressure dust collection system, and a positioning and clamping assembly, wherein the positioning and clamping assembly and the negative pressure dust collection system are integrated into one unit through a mechanical linkage structure to achieve coordinated control of clamping and dust collection; The positioning and clamping assembly is used to position, clamp, and selectively rotate the workpiece, and works in conjunction with the grinding assembly to complete an all-around grinding operation. The positioning and clamping assembly includes a driving assembly, a rotating assembly, and a fixing assembly. When the driving assembly drives the fixing assembly to move towards the center, it will drive the rotating assembly, which is fixedly connected to both ends of the top, to move synchronously, so that the rotating assembly is in a working position that can be driven to rotate. The fixed component and the rotating component are connected at one end respectively. After the fixed component completes the workpiece clamping action inward, when there is a need for rotational grinding, the fixed component retracts and engages with the rotating component, and is then driven by the rotating component to realize the workpiece rotating with the fixed component to cooperate with the grinding operation. The grinding assembly includes a grinding motor and a grinding head. The grinding head is a diamond grinding head, which is suitable for grinding workpieces of different materials. The output shaft of the grinding motor is fixedly connected to the grinding head and can drive the grinding head to rotate at high speed to complete the grinding operation. The negative pressure dust collection system includes a negative pressure fan and a dust collection box. The dust collection box is equipped with a primary filter, which can initially filter the dust generated during grinding, preventing dust from entering the negative pressure fan and avoiding affecting the service life of the equipment.

[0008] As a preferred embodiment of the present invention, the driving component includes a base, a baffle is fixedly connected to the center of the base, and first sliding blocks are movably connected to the grooves at both ends of the top of the base, and rotating components are fixedly connected to the tops of the two first sliding blocks.

[0009] As a preferred embodiment of the present invention, a bidirectional spiral rod is movably connected inside the two first sliding blocks, and a connecting post is correspondingly connected to the inner surface of the bidirectional spiral rod, with a rotating handle fixedly connected to the top of the connecting post.

[0010] As a preferred embodiment of the present invention, the rotating component includes a support block, the bottom of which is fixedly connected to the top of the first sliding block, and a retaining plate is connected to the rear end of the support block, with a triangular plate correspondingly connected to the groove of the retaining plate.

[0011] As a preferred embodiment of the present invention, a movable rod is fixedly connected to the bottom of the triangular plate, and a supporting base plate is movably connected to both ends of the outer surface of the movable rod. A rotating column is fixedly connected to the inner side of the card plate, and a fixing component is connected to the top of the rotating column.

[0012] As a preferred embodiment of the present invention, the fixing component includes a grooved plate, and two movable rods and threaded rods are connected to the top of the grooved plate. The outer surfaces of the two movable rods and threaded rods are movably connected to a second sliding block, and the top of the second sliding block is correspondingly connected to a telescopic plate to prevent dust from entering the interior.

[0013] As a preferred embodiment of the present invention, a torsion shell is fixedly connected to the top of the second sliding block, the rear end of the torsion shell is connected to the top of the rotating column, and two pneumatic grippers are movably connected to the inner side of the torsion shell, with anti-slip rubber pads connected to the grooves on the inner side of the two pneumatic grippers. The anti-slip rubber pad has evenly distributed anti-slip textures on its surface. The roughened surface can effectively increase the friction with the workpiece, preventing the workpiece from shifting during the grinding process. At the same time, the anti-slip rubber pad has a certain degree of elasticity, which can buffer the clamping force of the grippers and prevent the grippers from scratching the workpiece surface by hard contact.

[0014] Compared with the prior art, the beneficial effects of the present invention are: (1) A grinding device with negative pressure dust suction, which, through the cooperation of the bidirectional spiral rod and the first sliding block, can drive the two first sliding blocks to move synchronously to the center or both sides by rotating the rotating handle, realize the synchronous opening and closing of the fixed components, is convenient to adjust and has accurate positioning, effectively improves the efficiency and stability of workpiece clamping, and is suitable for grinding needs of workpieces of different sizes.

[0015] (2) A grinding device with negative pressure dust collection, wherein the base and the baffle are fixedly connected, and the first sliding block is movably connected to the groove of the base. The structure is reasonably designed and can limit and guide the movement of the first sliding block, avoid deviation during movement, ensure the stability of the drive component, and thus improve the working reliability of the entire positioning and clamping component.

[0016] (3) A grinding device with negative pressure dust collection, which can achieve rotation limit by clamping the plate with a triangular plate to prevent the plate from rotating randomly; at the same time, when there is a need for rotation grinding, the movable rod can be moved to move the triangular plate out of the groove of the plate. At this time, the plate can drive the rotating column and the fixed component to rotate and adjust the direction. This ensures that the rotating column drives the fixed component to rotate smoothly without shaking, and also ensures the accuracy of workpiece rotation grinding, avoiding grinding deviation.

[0017] (4) A grinding device with negative pressure dust collection, which uses the rotating column and the fixed component to rotate the outer shell. Only when the rotating outer shell is pushed backward and engaged with the rotating column can it be driven by the plate to rotate and adjust the direction. This achieves controllability of the rotation function, avoids accidental rotation when grinding is not required, and improves the safety and practicality of the device operation.

[0018] (5) A grinding device with negative pressure dust suction, wherein the inner side of the pneumatic gripper is provided with an anti-slip rubber pad with anti-slip texture. The roughened surface can effectively increase the friction with the workpiece, prevent the workpiece from shifting during high-speed grinding, and the elastic material can buffer the clamping force, prevent the gripper from hard contacting and scratching the workpiece surface, and protect the integrity of the workpiece appearance.

[0019] (6) A grinding device with negative pressure dust collection, wherein the position of the telescopic plate and the pneumatic gripper can be adjusted by the cooperation of the moving rod, the threaded rod and the second sliding block to adapt to the clamping requirements of workpieces of different shapes and sizes; and the telescopic plate can play a dustproof role, preventing grinding dust from entering the interior of the fixed component and extending the service life of the component. Among them, the two pneumatic grippers are movably installed in the groove of the twisting shell, which makes it easy to clamp the workpiece from different angles.

[0020] (7) A grinding equipment with negative pressure dust collection, which integrates the positioning clamping component and the negative pressure dust collection system through a mechanical linkage structure to achieve coordinated control of clamping and dust collection. During the grinding process, dust can be adsorbed simultaneously. Combined with the primary filter in the dust collection box, it can effectively filter dust and prevent dust from entering the negative pressure fan, which not only protects the equipment components and extends the equipment life, but also improves the working environment and reduces the harm of dust to operators. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the positioning and clamping assembly of the present invention; Figure 2 This is a schematic diagram of the driving component of the present invention; Figure 3 This is a schematic diagram of the rotating component of the present invention; Figure 4 This is a schematic diagram showing the connection relationship between the first sliding block and the support block of the present invention; Figure 5 This is a schematic diagram of the fixing component of the present invention; Figure 6 This is a schematic diagram of the internal connection relationship of the groove plate of the present invention; Figure 7 This is a schematic diagram showing the connection between the torsion shell and the pneumatic gripper of the present invention; Figure 8 This is a schematic diagram showing the connection relationship between the rotating column and the torsion shell of the present invention.

[0022] In the diagram: 1. Positioning and clamping assembly; 11. Drive assembly; 111. Base; 112. Baffle; 113. First sliding block; 114. Bidirectional spiral rod; 115. Connecting column; 116. Rotating handle; 12. Rotating assembly; 121. Support block; 122. Clamping plate; 123. Triangular plate; 124. Movable rod; 125. Support base plate; 126. Rotating column; 13. Fixing assembly; 131. Groove plate; 132. Moving rod; 133. Threaded rod; 134. Second sliding block; 135. Telescopic plate; 136. Twisting outer shell; 137. Pneumatic gripper; 138. Anti-slip rubber pad; 2. Frame; 3. Grinding assembly; 31. Grinding motor; 32. Grinding head; 4. Negative pressure dust collection system; 41. Negative pressure fan; 42. Dust collection box; 421. Primary filter. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Example: Please refer to Figure 1-2 A grinding device with negative pressure dust collection includes a frame 2, a grinding component 3, a negative pressure dust collection system 4, and a positioning and clamping component 1. The positioning and clamping component 1 and the negative pressure dust collection system 4 are integrated into one unit through a mechanical linkage structure to achieve coordinated control of clamping and dust collection. The positioning and clamping assembly 1 is used to position, clamp, and selectively rotate the workpiece, and works in conjunction with the grinding assembly 3 to complete an all-round grinding operation; The positioning and clamping assembly 1 includes a driving assembly 11, a rotating assembly 12 and a fixing assembly 13. When the driving assembly 11 drives the fixing assembly 13 to move towards the center, it will drive the rotating assembly 12, which is fixedly connected at both ends of the top, to move synchronously, so that the rotating assembly 12 is in a working position that can be driven to rotate. The fixed component 13 is connected to one end of the rotating component 12. After the fixed component 13 completes the workpiece clamping action inward, when there is a need for rotational grinding, the fixed component 13 retracts and engages with the rotating component 12, and is then driven by the rotating component 12, so that the workpiece rotates with the fixed component 13 to cooperate with the grinding operation. The grinding assembly 3 includes a grinding motor 31 and a grinding head 32. The grinding head 32 is a diamond grinding head, which is suitable for grinding workpieces of different materials. The output shaft of the grinding motor 31 is fixedly connected to the grinding head 32, which can drive the grinding head 32 to rotate at high speed to complete the grinding operation. The negative pressure dust collection system 4 includes a negative pressure fan 41 and a dust collection box 42. The dust collection box 42 is equipped with a primary filter 421, which can initially filter the dust generated by grinding, prevent the dust from entering the negative pressure fan 41, and avoid affecting the service life of the equipment.

[0025] Example 2: Based on Example 1, as follows Figure 3-8As shown, the driving assembly 11 includes a base 111, with a baffle 112 at its center. The center of the base 111 is fixedly connected to both ends of the baffle 112. A first sliding block 113 is provided at each of the two grooves at the top of the base 111, and these grooves are movably connected to the protruding parts at the bottom of the first sliding block 113. The fixed connection between the base 111 and the baffle 112, and the movable connection between the first sliding block 113 and the groove of the base 111, constitute a reasonable structural design. This design effectively limits and guides the movement of the first sliding block 113, preventing deviation during movement and ensuring the stability of the driving assembly 11's operation, thereby improving the overall reliability of the positioning and clamping assembly 1. A rotating assembly 12 is provided at the top of each of the two first sliding blocks 113, and the tops of both first sliding blocks 113 are fixedly connected to the bottom of the rotating assembly 12.

[0026] The two first sliding blocks 113 are internally equipped with bidirectional helical rods 114. Through the cooperation of the bidirectional helical rods 114 and the first sliding blocks 113, rotating the rotary handle 116 can drive the two first sliding blocks 113 to move synchronously towards the center or both sides, realizing the synchronous opening and closing of the fixing component 13. The adjustment is convenient and the positioning is accurate, effectively improving the efficiency and stability of workpiece clamping and adapting to the grinding needs of workpieces of different sizes. The interior of the two first sliding blocks 113 is movably connected to the outer surface of the bidirectional helical rods 114. The inner surface of the bidirectional helical rods 114 is provided with a connecting post 115, and the inner surface of the bidirectional helical rods 114 is correspondingly connected to the outer surface of the connecting post 115. The top of the connecting post 115 is provided with a rotary handle 116, and the top of the connecting post 115 is rotatably fixedly connected to the rotary handle 116.

[0027] The rotating assembly 12 includes a support block 121. The bottom of the support block 121 is fixedly connected to the top of the first sliding block 113. A retaining plate 122 is provided at the rear end of the support block 121, and the rear end of the support block 121 is connected to the center of the retaining plate 122. A triangular plate 123 is provided at the groove of the retaining plate 122, and the groove of the retaining plate 122 is correspondingly connected to the outer surface of the triangular plate 123.

[0028] The bottom of the triangular plate 123 is provided with a movable rod 124, and the bottom of the triangular plate 123 is fixedly connected to the center of the movable rod 124. Both ends of the outer surface of the movable rod 124 are provided with supporting base plates 125, and both ends of the outer surface of the movable rod 124 are movably connected to the two ends of the supporting base plates 125. The inner side of the clamping plate 122 is provided with a rotating column 126, and the inner side of the clamping plate 122 is fixedly connected to the bottom end of the rotating column 126. The top end of the rotating column 126 is provided with a fixing component 13, and the top end of the rotating column 126 is connected to the rear end of the fixing component 13. The triangular plate 123 can lock the clamping plate 122 to achieve rotation limit and prevent the clamping plate 122 from rotating arbitrarily. At the same time, when there is a need for rotational grinding, the movable rod 124 can be moved to move the triangular plate 123 out of the groove of the clamping plate 122. At this time, the clamping plate 122 can drive the rotating column 126 and the fixed component 13 to rotate in a directional adjustment. This ensures that the rotating column 126 drives the fixed component 13 to rotate smoothly without shaking, and also ensures the accuracy of workpiece rotational grinding, avoiding grinding deviation.

[0029] The fixing component 13 includes a grooved plate 131. Two movable rods 132 and a threaded rod 133 are each provided on the top of the grooved plate 131, and the top of the grooved plate 131 is correspondingly connected to the bottom of the two movable rods 132 and the threaded rod 133. A second sliding block 134 is provided on the outer surface of the two movable rods 132 and the threaded rod 133, and the outer surface of the two movable rods 132 and the threaded rod 133 is movably connected to the interior of the second sliding block 134. A telescopic plate 135 is provided on the top of the second sliding block 134, and the top of the second sliding block 134 is correspondingly connected to one end of the telescopic plate 135 to prevent dust from entering the interior.

[0030] The second sliding block 134 has a torsion housing 136 on its top, and the top of the second sliding block 134 is fixedly connected to the bottom of the torsion housing 136. The rear end of the torsion housing 136 is connected to the top of the rotating column 126. Two pneumatic grippers 137 are provided on the inner side of the torsion housing 136, and the rear ends of the two pneumatic grippers 137 are movably connected to the inner side of the torsion housing 136. Through the cooperation of the moving rod 132, the threaded rod 133 and the second sliding block 134, the position of the telescopic plate 135 and the pneumatic grippers 137 can be adjusted to adapt to the clamping requirements of workpieces of different shapes and sizes. The telescopic plate 135 can also play a dustproof role, preventing grinding dust from entering the interior of the fixed assembly 13 and extending the service life of the assembly. The two pneumatic grippers 137 are movably installed in the groove of the torsion housing 136, which facilitates clamping the workpiece from different angles. Anti-slip rubber pads 138 are provided in the inner grooves of the two pneumatic grippers 137, and the inner grooves of the pneumatic grippers 137 are connected to the rear end of the anti-slip rubber pads 138. The surface of the anti-slip rubber pad 138 is provided with uniformly distributed anti-slip textures. The roughened surface can effectively increase the friction with the workpiece and prevent the workpiece from shifting during the grinding process. At the same time, the anti-slip rubber pad 138 has a certain elasticity, which can buffer the clamping force of the gripper and prevent the gripper from scratching the workpiece surface by hard contact.

[0031] The working principle of this invention is as follows: First, the workpiece is positioned and clamped by the positioning and clamping component 1. The positioning and clamping component 1 and the negative pressure dust collection system 4 are integrated into one unit through a mechanical linkage structure, which can realize the coordinated control of clamping and dust collection. The core function of the positioning and clamping component 1 is to position, clamp and selectively rotate the workpiece in order to cooperate with the grinding component 3 to complete the all-round grinding operation. The positioning and clamping assembly 1 includes a drive assembly 11, a rotating assembly 12, and a fixing assembly 13. When the drive assembly 11 is working, the operator rotates the rotating handle 116 at the top of the connecting column 115. The rotating handle 116 drives the connecting column 115 to rotate, which in turn drives the bidirectional spiral rod 114, which is connected to the outer surface of the connecting column 115, to rotate. Since the bidirectional spiral rod 114 is internally connected to the two first sliding blocks 113, the baffle 112 will limit and guide the movement of the first sliding blocks 113 during the movement to avoid movement deviation. Therefore, when the bidirectional spiral rod 114 rotates, it will drive the two first sliding blocks 113 to move synchronously towards the center or both sides, thereby driving the rotating assembly 12, which is fixedly connected to the top of the first sliding blocks 113, to move synchronously, so that the rotating assembly 12 is in a working position that can be driven to rotate. When the drive assembly 11 drives the fixed assembly 13 to move towards the center, the pneumatic gripper 137 of the fixed assembly 13 will move inward to complete the workpiece clamping action. The anti-slip rubber pad 138 can increase the friction with the workpiece, prevent the workpiece from shifting during grinding, and at the same time buffer the clamping force to prevent scratching the workpiece surface. After clamping, if no rotational grinding is required, the triangular plate 123 of the rotating component 12 will lock the clamping plate 122 to achieve rotational limit and prevent the clamping plate 122 from rotating arbitrarily. If rotational grinding is required, the operator moves the movable rod 124. The movable rod 124 drives the triangular plate 123 to move out of the groove of the clamping plate 122. At the same time, the twisting shell 136 of the fixing component 13 is pushed backward so that the twisting shell 136 is engaged with the rotating column 126. At this time, the clamping plate 122 can drive the rotating column 126 and the fixing component 13 engaged with the rotating column 126 to adjust the direction of rotation. This ensures that the rotating column 126 drives the fixing component 13 to rotate smoothly without shaking, ensuring the accuracy of workpiece rotational grinding and avoiding grinding deviation. Meanwhile, the fixed component 13 can adjust the position of the telescopic plate 135 and the pneumatic gripper 137 through the cooperation of the moving rod 132, the threaded rod 133 and the second sliding block 134, to adapt to the clamping requirements of workpieces of different shapes and sizes. The telescopic plate 135 can also play a dustproof role, preventing grinding dust from entering the fixed component 13 and extending the service life of the component. After the positioning and clamping assembly 1 completes the positioning, clamping and rotation adjustment of the workpiece, the grinding assembly 3 starts to work. The grinding motor 31 of the grinding assembly 3 starts, and its output shaft drives the diamond grinding head 32 fixedly connected to it to rotate at high speed. The diamond grinding head 32 adapts to the grinding requirements of workpieces of different materials and performs grinding operations on the workpiece. During the grinding process, the negative pressure dust collection system 4, which is linked with the positioning and clamping component 1, starts synchronously. The negative pressure fan 41 generates negative pressure, which draws the grinding dust into the dust collection box 42. The primary filter 421 installed inside the dust collection box 42 performs preliminary filtration of the dust, preventing it from entering the negative pressure fan 41 and thus avoiding affecting the service life of the equipment. At the same time, it improves the working environment and reduces the harm of dust to the operators. Through the coordinated cooperation of various components, the entire equipment completes the precise grinding of the workpiece and the simultaneous treatment of dust. The frame 2 provides stable support for all components of the entire equipment, ensuring the overall stability of the equipment operation.

[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A polishing device with negative pressure dust collection, comprising a frame (2), a polishing assembly (3), a negative pressure dust collection system (4), and a positioning and clamping assembly (1), characterized in that: The positioning clamping component (1) and the negative pressure dust collection system (4) are integrated into one through a mechanical linkage structure to achieve coordinated control of clamping and dust collection; The positioning and clamping assembly (1) is used to position, clamp and selectively rotate the workpiece, and works in conjunction with the grinding assembly (3) to complete the all-round grinding operation; The positioning and clamping assembly (1) includes a driving assembly (11), a rotating assembly (12) and a fixing assembly (13). When the driving assembly (11) drives the fixing assembly (13) to move towards the center, it will drive the rotating assembly (12) which is fixedly connected at both ends of the top to move synchronously, so that the rotating assembly (12) is in a working position that can be driven to rotate. The fixed component (13) is connected to one end of the rotating component (12). After the fixed component (13) completes the workpiece clamping action inward, when there is a need for rotational grinding, the fixed component (13) moves backward and engages with the rotating component (12), and is then driven by the rotating component (12) to realize the workpiece rotation with the fixed component (13) to cooperate with the grinding operation. The grinding assembly (3) includes a grinding motor (31) and a grinding head (32). The grinding head (32) is a diamond grinding head, which is adapted to the grinding requirements of workpieces of different materials. The output shaft of the grinding motor (31) is fixedly connected to the grinding head (32) and can drive the grinding head (32) to rotate at high speed to complete the grinding operation. The negative pressure dust collection system (4) includes a negative pressure fan (41) and a dust collection box (42). The dust collection box (42) is equipped with a primary filter (421) to preliminarily filter the dust generated during grinding, preventing the dust from entering the negative pressure fan (41) and avoiding affecting the service life of the equipment.

2. The polishing equipment with negative pressure dust collection according to claim 1, characterized in that: The drive assembly (11) includes a base (111), a baffle (112) is fixedly connected to the center of the base (111), and a first sliding block (113) is movably connected to the grooves at both ends of the top of the base (111). A rotating assembly (12) is fixedly connected to the top of each of the two first sliding blocks (113).

3. A polishing device with negative pressure dust collection according to claim 2, characterized in that: Two first sliding blocks (113) are internally connected to a bidirectional spiral rod (114), and a connecting post (115) is correspondingly connected to the inner surface of the bidirectional spiral rod (114). A rotating handle (116) is fixedly connected to the top of the connecting post (115).

4. A grinding device with negative pressure dust collection according to claim 2, characterized in that: The rotating component (12) includes a support block (121), the bottom of which is fixedly connected to the top of the first sliding block (113), and a retaining plate (122) is connected to the rear end of the support block (121), with a triangular plate (123) correspondingly connected to the groove of the retaining plate (122).

5. A grinding device with negative pressure dust collection according to claim 4, characterized in that: The bottom of the triangular plate (123) is fixedly connected to a movable rod (124), and both ends of the outer surface of the movable rod (124) are movably connected to a supporting base plate (125). The inner side of the clamping plate (122) is fixedly connected to a rotating column (126), and the top of the rotating column (126) is connected to a fixing component (13).

6. A grinding device with negative pressure dust collection according to claim 5, characterized in that: The fixing component (13) includes a grooved plate (131), and two movable rods (132) and threaded rods (133) are connected to the top of the grooved plate (131). The outer surfaces of the two movable rods (132) and threaded rods (133) are movably connected to a second sliding block (134). The top of the second sliding block (134) is correspondingly connected to a telescopic plate (135) to prevent dust from entering the interior.

7. A polishing device with negative pressure dust collection according to claim 6, characterized in that: The second sliding block (134) is fixedly connected to the top of a twisting shell (136). The rear end of the twisting shell (136) is connected to the top of the rotating column (126). Two pneumatic grippers (137) are movably connected to the inner side of the twisting shell (136). Anti-slip rubber pads (138) are connected to the grooves on the inner side of the two pneumatic grippers (137).

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