A straight handle electric sander with a front dust absorption module

Abstract

The present application relates to the technical field of electric grinder, and discloses a straight handle electric grinder with front dust collection module, which comprises an electric grinder upper cover, the side wall of the electric grinder upper cover is attached with an electric grinder lower cover, the front end of the electric grinder upper cover and the electric grinder lower cover is jointly clamped with an electric grinder front cover, and the rear end of the electric grinder upper cover and the electric grinder lower cover is jointly clamped with an electric grinder rear cover. The straight handle electric grinder with front dust collection module is better for dust removal during polishing, and the dust collection assembly is arranged. When the electric grinder body works and dust is generated, the dust collection module motor is started by cooperating with the dust collection module switch button, the dust collection module charging interface and the dust collection module battery, so that the front half-open impeller rotates, and then the dust and airflow enter the dust collection module bottom box through the dust suction port, the dust and impurities are intercepted by the filter plate and enter the dust collection compartment, and the filtered airflow is discharged through the air outlet, so that the dust removal during polishing can be better.

Description

Technical Field

[0001] This invention relates to the field of electric grinder technology, specifically to a straight-shank electric grinder with a front-mounted dust extraction module. Background Technology

[0002] In modern industrial processing, handicraft production, and repair, the straight shank electric grinder is a commonly used power tool. Due to its compact size, flexibility, and ease of operation, it is widely used for grinding, cutting, and carving various materials. However, traditional straight shank electric grinders have a serious dust problem during operation. When grinding or cutting materials such as metal, wood, stone, and plastic, a large amount of fine dust particles are generated. This dust not only permeates the working environment, seriously polluting the air quality, but also poses a potential threat to the health of operators. For example, long-term inhalation may lead to respiratory diseases such as pneumoconiosis.

[0003] To address the dust problem, some electric grinders have adopted a rear-mounted dust collection system. However, this design has several limitations. On one hand, the dust inlet of the rear-mounted system is far from the processing area, and some of the dust has already dispersed into the air during the dust collection process, resulting in poor dust collection and an inability to effectively collect most of the dust generated during operation. On the other hand, the rear-mounted dust collection structure makes the overall layout of the electric grinder less reasonable, increasing its size and weight, and affecting its operational flexibility and portability.

[0004] Furthermore, existing straight-shank electric grinders often lack filtration devices in their dust collection systems. Even if some grinders can collect a certain amount of dust, the exhaust air still contains a large number of fine dust particles due to inadequate filtration, failing to fundamentally solve the dust pollution problem. Moreover, existing dust collection systems are difficult to clean and maintain. Cleaning and replacing the filter is complex, increasing user costs and maintenance workload. They also cannot effectively cool and dissipate heat while grinding and removing dust. The assembly of the grinder body is not convenient enough, and its practicality needs to be improved.

[0005] In view of this, we propose a straight-shank electric grinder with a front-mounted dust extraction module. Summary of the Invention

[0006] The purpose of this invention is to provide a straight-handle electric grinder with a front-mounted dust extraction module to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A straight-handle electric grinder with a front-mounted dust collection module includes a top cover, a bottom cover of which is attached to the side wall of the top cover. The front ends of the top and bottom covers are jointly engaged with a front cover, and the rear ends of the top and bottom covers are jointly engaged with a rear cover. The top cover has a power switch, a speed indicator light, and a charging port arranged sequentially from front to back. The bottom cover houses a motor, a battery, and a circuit board. The motor output is fixedly connected to one end of a drive shaft, which is fixedly mounted inside a bearing. The bearing's outer side is fixedly mounted to the inner wall of the bottom cover. A clamp is fixedly mounted to the other end of the drive shaft, and a grinding head is fitted onto the other end of the clamp. A chuck nut is threaded onto the outside of the clamp, and the grinding head passes through the chuck nut. A dust collection assembly is mounted on the top cover, comprising: The upper and lower covers of the electric grinder are both provided with grooves on their front exterior. A boss slides and fits inside the groove. The boss is fixedly installed on one end of the dust collection module's base box. A dust collection port is provided at the other end of the dust collection module's base box. A dovetail groove is provided inside the dust collection module's base box. A dovetail block slides and fits inside the dovetail groove. The dovetail block is fixedly installed on the dust collection chamber. The dust collection chamber is fitted inside the dust collection module's base box. A fixing slot is provided inside the dust collection chamber. One end of the dust collection module's top cover is hinged to the outside of the dust collection module's base box via a hinge rod. The vacuum module has a movable slot inside its top cover. An iron sheet is fixedly installed inside the bottom box of the vacuum module. A magnet is fixedly installed inside the other end of the top cover of the vacuum module. The iron sheet is attached to the magnet. The vacuum module motor and vacuum module battery are snapped into place inside the bottom box of the vacuum module. The vacuum module motor and vacuum module battery are attached to the outside of a retaining ring. The retaining ring is fixedly connected to the bottom box of the vacuum module by screws. The front half-open impeller is fixedly installed at the output end of the vacuum module motor. One end of the filter plate is locked inside the fixed slot, and the other end of the filter plate is attached to the inside of the movable slot. A through air outlet is opened on the side wall of the bottom box of the vacuum module. A vacuum module switch button and a vacuum module charging interface are provided on the side wall of the bottom box of the vacuum module.

[0008] Preferably, the electric mill switch button, speed control indicator light, electric mill charging interface, electric mill motor, electric mill battery and electric mill circuit board are electrically connected, and multiple sets of speed control indicator lights are provided to better adjust the current working speed of the electric mill body.

[0009] Preferably, the grooves and protrusions are provided in multiple sets, and the multiple sets of grooves and protrusions are arranged in a circumferential array with equal spacing. There are two sets of dovetail grooves and dovetail blocks. There are multiple sets of filter plates. The vacuum module motor and vacuum module battery, vacuum module switch button and vacuum module charging interface are electrically connected.

[0010] Preferably, a heat dissipation assembly is provided outside the electric mill motor. The heat dissipation assembly includes a cooling fan. The cooling fan is fixedly installed on the outer wall of the drive shaft. Both the upper and lower covers of the electric mill have through air inlets at their front ends, located outside the cooling fan. Both the upper and lower covers have through exhaust holes in their middle sections, located outside the electric mill motor. The rear cover of the electric mill has a through slot, thereby better forming an airflow circuit for cooling and heat dissipation.

[0011] Preferably, a stop pin is slidably installed inside the front end of the electric mill cover, and a spring is sleeved on the outside of the stop pin, with both ends of the spring fixedly installed between the stop pin and the electric mill cover. An insertion hole is opened on the drive shaft, and the stop pin and the insertion hole are in the same vertical plane, so as to facilitate the fixing of the drive shaft.

[0012] Preferably, an auxiliary component is provided on the outside of the drive shaft. The auxiliary component includes a positioning hole. The upper cover of the electric mill is provided with a positioning hole, and a positioning column is fixedly installed on the lower cover of the electric mill. The positioning column slides and fits inside the positioning hole. Multiple sets of positioning columns and positioning holes are provided.

[0013] Preferably, an elastic block is fixedly installed on the side wall of the upper cover of the electric mill, and an auxiliary groove is provided on the lower cover of the electric mill. The elastic block slides and fits inside the auxiliary groove, which facilitates the assembly of the upper cover and the lower cover of the electric mill.

[0014] Preferably, the upper and lower covers of the electric mill are fixedly equipped with rotating snap-fits at both ends, and the front and rear covers of the electric mill are provided with rotating slots. The rotating snap-fits engage with the rotating slots to facilitate the assembly of the front and rear covers of the electric mill.

[0015] Preferably, the bottom box and top cover of the dust collection module are provided with stop edges, and the front exterior of the upper cover and lower cover of the electric grinder are provided with protrusions, which makes it less likely to slip during use and conforms to gripping and force-bearing habits.

[0016] Preferably, the front semi-open impeller includes a rear cover plate. One end of the rear cover plate is connected to the output end of the vacuum module motor, and a hub is fixedly installed on the other end of the rear cover plate. Main blades and diverting blades are fixedly installed on the hub. Multiple sets of main blades and diverting blades are arranged in an equidistant, staggered circular array, so that the negative pressure generated during vacuuming can quickly suck in dust and other particles, thereby improving vacuuming efficiency.

[0017] Compared with the prior art, the present invention provides a straight-handle electric grinder with a front-mounted dust extraction module, which has the following beneficial effects: 1. This straight-handle electric grinder with a front-mounted dust collection module, designed for better dust removal during grinding, incorporates a dust collection assembly. A groove and a boss are used to mount the dust collection module's base box onto the upper and lower covers of the grinder. A dovetail groove and dovetail block are used to mount the dust collection chamber onto the base box. A retaining ring and screws are used to mount the dust collection module's motor and battery onto the base box. A filter plate is installed in a fixed slot. A hinge rod is used to attach the top cover of the dust collection module to the base box. Finally, a metal sheet and magnet are used for... The mutual attraction and adhesion make the top cover and bottom box of the dust collection module more stable. At this time, the moving slot will engage with the filter plate to make it more stable. When the electric grinder generates dust, the dust collection module motor is started in conjunction with the dust collection module switch button and the dust collection module charging interface, which makes the front semi-open impeller rotate. Dust and airflow enter the bottom box of the dust collection module through the dust inlet. Dust and impurities are intercepted by the filter plate and enter the dust collection chamber. The filtered airflow is discharged through the air outlet, thus enabling better dust removal during grinding.

[0018] 2. This front-mounted dust extraction module for straight-handle electric grinders features a heat dissipation system to better cool the grinder body. This system works in conjunction with the grinder's power switch, speed indicator light, charging port, battery, and circuit board. When the grinder motor is started, the bearings rotate the drive shaft, which in turn rotates the grinding head via the chuck and collet nut. Simultaneously, the cooling fan rotates, drawing external air into the grinder body through the air inlet (i.e., from the side). Air is then directed towards the motor along the internal air duct and exhausted through the exhaust port and through-slot, creating a circulation. This circulation allows for heat exchange with the outside air via natural or forced convection, effectively reducing the grinder body's temperature. The system also includes a stop pin, spring, and insertion hole for easy fixing of the drive shaft and convenient tightening of the collet nut.

[0019] 3. This straight-handle electric grinder with a front-mounted dust collection module features auxiliary components to enhance its practicality. These components, along with positioning holes and posts, facilitate the assembly of the upper and lower covers. Elastic blocks and auxiliary grooves ensure a more secure connection between the upper and lower covers. Rotary latches and slots facilitate the assembly of the front and rear covers. Stops allow for easy positioning of the dust collection module's base and top cover. Raised points increase grip friction, preventing slippage during use and conforming to comfortable gripping and force application, thus improving the overall practicality of the electric grinder.

[0020] 4. This straight-handle electric grinder with a front-mounted dust collection module utilizes a unique semi-open impeller shape for better dust removal. This means the impeller lacks a front cover plate, creating a large space between the main blades and the rear cover plate. This design allows for better suction and passage of larger dust and debris, unlike closed impellers which are prone to clogging due to a smaller inlet. It adapts to various complex dust collection environments, such as construction sites and workshops where dust often contains small stones, wood chips, and other large particles. During dust collection, the relatively open structure of the semi-open impeller prevents hair and fibers from easily getting tangled, ensuring stable operation and maintaining good suction. This is particularly advantageous in homes and barbershops where there is a lot of hair and fibers. Combined with the hub, main blades, and diverter blades, the semi-open impeller effectively guides airflow, allowing the negative pressure generated during dust collection to quickly draw in dust and other debris, improving efficiency and enabling the removal of large amounts of dust in a short time for rapid cleaning of large areas. Attached Figure Description

[0021] Figure 1 This is a top view of the overall structure of the present invention; Figure 2 This is a bottom view of the overall structure of the present invention from another perspective; Figure 3 This is an exploded view of the overall structure of the present invention along a single axis; Figure 4 This is an exploded view of a portion of the dust collection component of the present invention; Figure 5 This is an exploded view of the top cover of the dust collection module of the present invention; Figure 6 This is an exploded view of the dust collection bin of the present invention; Figure 7 This is a schematic cross-sectional view of part of the structure of the present invention; Figure 8 This is a biaxial exploded view of the present invention; Figure 9 This is an exploded view of the rear cover of the electric mill of the present invention; Figure 10 This is an exploded cross-sectional view of part of the structure of the present invention; Figure 11 For the present invention Figure 10 Enlarged structural diagram of region A in the middle; Figure 12 This is a schematic diagram of the semi-open impeller structure of the present invention.

[0022] In the diagram: 1. Top cover of the electric grinder; 2. Bottom cover of the electric grinder; 3. Front cover of the electric grinder; 4. Rear cover of the electric grinder; 5. Switch button of the electric grinder; 6. Speed ​​indicator light; 7. Charging interface of the electric grinder; 8. Motor of the electric grinder; 9. Battery of the electric grinder; 10. Circuit board of the electric grinder; 11. Drive shaft; 12. Bearing; 13. Core; 14. Grinding head; 15. Chuck nut; 16. Dust collection assembly; 161. Groove; 162. Boss; 163. Base box of the dust collection module; 1640. Dust collection port; 1641. Dovetail groove; 1642. Dovetail block; 1643. Dust collection bin; 1644. Fixing slot; 165. Hinge rod; 166. Top cover of the dust collection module; 1660. Moving slot; 167. Iron sheet; 168. Magnet; 169. Dust collection module 1610. Motor; 1611. Batteries for vacuuming modules; 1612. Snap ring; 1613. Screws; 1614. Semi-open impeller; 1615. Filter plate; 1616. Air outlet; 1617. Switch button for vacuuming modules; 1618. Charging interface for vacuuming modules; 17. Heat dissipation assembly; 171. Cooling fan; 172. Air inlet; 173. Air outlet; 174. Through slot; 175. Stop pin; 176. Spring; 177. Insertion hole; 18. Auxiliary components; 181. Positioning hole; 182. Positioning post; 183. Elastic block; 184. Auxiliary groove; 185. Rotary bayonet; 186. Rotary slot; 187. Stop; 188. Protrusion; 191. Rear cover plate; 192. Hub; 193. Main blade; 194. Diverter blade. 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] In this application, the term "above" indicates the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. It is primarily used to better describe this application and its embodiments, and is not intended to limit the indicated device, element, or component to having a specific orientation, or to construct and operate in a specific orientation. Furthermore, the term "above" may also be used in certain circumstances to indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances.

[0025] Please see Figure 1 - Figure 12 The present invention provides a technical solution: A straight-handle electric grinder with a front-mounted dust extraction module includes a grinder top cover 1, a grinder bottom cover 2 attached to the side wall of the top cover 1, a grinder front cover 3 snapped together at the front ends of the top cover 1 and the grinder rear cover 4 snapped together at the rear ends of the top cover 1 and the grinder top cover 2. The top cover 1 has, from front to back, a grinder switch button 5, a speed control indicator light 6, and a grinder charging interface 7. The bottom cover 2 houses a grinder motor 8, a grinder battery 9, and a grinder circuit board 10. The output end of the grinder motor 8 is fixedly connected to one end of a drive shaft 11. 1. The bearing 12 is fixedly installed inside one side, and the bearing 12 is fixedly installed on the inner wall of the lower cover 2 of the electric grinder. The other end of the drive shaft 11 is fixedly installed with one end of the clamp 13. The other end of the clamp 13 is fitted with the electric grinder head 14. The clamp 13 is threaded with a collet nut 15. The electric grinder head 14 passes through the collet nut 15. In addition, the electric grinder switch button 5, the speed adjustment indicator light 6, the electric grinder charging interface 7, the electric grinder motor 8, the electric grinder battery 9 and the electric grinder circuit board 10 are electrically connected. The speed adjustment indicator light 6 is provided in three sets to better adjust the current working speed of the electric grinder body.

[0026] When the user is ready to use the electric grinder for grinding, they press the electric grinder switch button 5. At this time, an electrical signal is transmitted to the speed control indicator 6, the electric grinder battery 9, and the electric grinder circuit board 10. The signal received by the electric grinder circuit board 10 controls the electrical energy output by the electric grinder battery 9, thereby starting the electric grinder motor 8. Its output end will rotate at high speed, driving the drive shaft 11 to rotate together. The bearing 12 reduces the frictional resistance when the drive shaft 11 rotates. With the help of the collet nut 15, the grinding head 14 is fixed on the clamp 13, ensuring that the grinding head 14 will not loosen or shift during the high-speed operation of the electric grinder, and thus rotates stably to carry out the grinding work. During the grinding process, the high-speed rotation of the grinding head 14 will generate friction with the surface of the object being ground, removing excess material from the surface of the object and achieving the purpose of grinding.

[0027] In one embodiment of the present invention, a dust collection component 16 is provided on the upper cover 1 of the electric grinder. The dust collection component 16 includes a groove 161. Grooves 161 are provided on the outer front ends of both the upper cover 1 and the lower cover 2 of the electric grinder. A boss 162 is slidably fitted inside the groove 161. The boss 162 is fixedly installed on one end of the dust collection module base box 163. A dust collection port 1640 is provided at the other end of the dust collection module base box 163. A dovetail groove 1641 is provided inside the dust collection module base box 163. A dovetail block 1642 is slidably fitted inside the dovetail groove 1641. The dovetail block 1642 is fixedly installed on the dust collection chamber 1643. The dust collection chamber 1643 is fitted inside the dust collection module base box 163. The 643 has a fixed slot 1644 inside. The vacuum module base box 163 is hinged to one end of the vacuum module top cover 166 via a hinge rod 165. The vacuum module top cover 166 has a movable slot 1660 inside. An iron sheet 167 is fixedly installed inside the vacuum module base box 163. A magnet 168 is fixedly installed inside the other end of the vacuum module top cover 166. The iron sheet 167 is attached to the magnet 168. The vacuum module motor 169 and vacuum module battery 1610 are snapped together inside the vacuum module base box 163. A retaining ring 1611 is attached to the outside of the vacuum module motor 169 and vacuum module battery 1610. The retaining ring 1611 is connected to the vacuum module base box 1644 by screws 1612. 3. Fixed connection: A semi-open impeller 1613 is fixedly installed at the output end of the vacuum module motor 169. The semi-open impeller 1613 includes a rear cover plate 191. One end of the rear cover plate 191 is connected to the output end of the vacuum module motor 169, and the other end of the rear cover plate 191 is fixedly installed with a hub 192. Main blades 193 and diverting blades 194 are fixedly installed on the hub 192. Seven sets of main blades 193 and diverting blades 194 are arranged in an equally spaced, staggered circular array, allowing the negative pressure generated during vacuuming to quickly suck in dust and other contaminants, improving vacuuming efficiency. One end of a filter plate 1614 is locked inside the fixing slot 1644. 14 The other end fits into the inside of the movable card slot 1660. A through air outlet 1615 is opened on the side wall of the vacuum module base box 163. A vacuum module switch button 1616 and a vacuum module charging interface 1617 are provided on the side wall of the vacuum module base box 163. In addition, multiple sets of grooves 161 and protrusions 162 are provided, and multiple sets of grooves 161 and protrusions 162 are arranged in a circumferential array with equal spacing. Two sets of dovetail grooves 1641 and dovetail blocks 1642 are provided, and three sets of filter plates 1614 are provided, so as to improve the dust interception effect. The vacuum module motor 169 and vacuum module battery 1610, vacuum module switch button 1616 and vacuum module charging interface 1617 are electrically connected.

[0028] In this embodiment, while the electric grinder is grinding, pressing the vacuum module switch button 1616 will cause the vacuum module battery 1610 to output electrical energy to the vacuum module motor 169, causing the vacuum module motor 169 to start running and drive the front semi-open impeller 1613 to rotate at high speed. The front semi-open impeller 1613 consists of a rear cover plate 191, a hub 192, main blades 193, and diverting blades 194. Among them, the hub 192 serves as the core support structure of the impeller, evenly transmitting the rotational power of the motor. The main blades 193 and the diverting blades 194, when the impeller rotates at high speed, rapidly cut through the air, creating a negative pressure at the suction port 1640. Under this negative pressure, the dust generated during the polishing process and the surrounding airflow are quickly drawn into the bottom box 163 of the suction module. After entering the bottom box 163, the dust and airflow encounter the filter plate 1614, which effectively intercepts dust and impurities while allowing airflow to pass through. The intercepted dust will be further compressed by the combined forces of gravity and airflow. Under the action of the dust collector, the air gradually settles into the dust collection chamber 1643. The dust collection chamber 1643 is securely mounted on the bottom box 163 of the dust collection module through the cooperation of the dovetail groove 1641 and the dovetail block 1642. The filtered airflow continues to flow and is finally discharged through the air outlet 1615, thereby achieving continuous and efficient dust collection. The groove 161 and the boss 162 cooperate with each other to assemble the bottom box 163 of the dust collection module onto the upper cover 1 and the lower cover 2 of the electric grinder. The retaining ring 1611 and the screw 1612 secure the dust collection module. The motor 169 and the vacuum module battery 1610 are firmly fixed to the vacuum module base box 163; the hinge rod 165 connects the vacuum module top cover 166 and the vacuum module base box 163, allowing the vacuum module top cover 166 to open and close flexibly; the mutual attraction between the iron sheet 167 and the magnet 168 enhances the sealing and stability between the vacuum module top cover 166 and the vacuum module base box 163; the movable slot 1660 is engaged with the filter plate 1614, further ensuring the stability of the filter plate 1614 during operation.

[0029] Furthermore, the most significant feature of the semi-open impeller 1613 compared to the traditional closed impeller is the absence of a front cover plate. This creates a larger space between the main blades 193 and the rear cover plate 191. In complex dust-collecting environments such as construction sites and workshops, dust often contains large particles such as small stones and wood chips. Due to the larger inlet space of the semi-open impeller 1613, these large particles can be more easily drawn into the interior of the semi-open impeller 1613 and pass through it smoothly. Unlike closed impellers, which are prone to large particle blockage due to their smaller inlet, this special structural design greatly improves the adaptability of the electric grinder's dust collection module to complex environments, ensuring stable and efficient dust collection under various harsh working conditions. In environments such as homes and barbershops, dust collection often encounters easily entangled materials such as hair and fibers. The relatively open structure of the semi-open impeller 1613 prevents these hair and fibers from easily getting tangled on it after being sucked in. When hair and fibers come into contact with the semi-open impeller 1613, due to the rotation of the semi-open impeller 1613 and the large space between the blades, they are quickly carried out of the impeller by the airflow, without accumulating and tangling on the impeller. This advantage allows the dust collection module of the electric grinder to operate continuously and stably when handling dust in such environments, maintaining a good dust collection effect and avoiding the decrease in dust collection efficiency and equipment failure caused by impeller entanglement; the hub 192, main blades 193 and diverter blades 194 are coordinated with each other. Together, they effectively guide the airflow through the semi-open impeller 1613. When the semi-open impeller 1613 rotates at high speed, the main blade 193 and the diverting blade 194 cut the air at a specific angle and speed, forming a strong and uniform negative pressure at the suction port 1640. This negative pressure can quickly suck in dust and other particles, greatly improving the suction efficiency. In actual use, the electric grinder suction module can suck away a large amount of dust in a short time, quickly cleaning a large area and meeting the user's demand for efficient cleaning.

[0030] In one embodiment of the present invention, a heat dissipation assembly 17 is provided outside the electric mill motor 8. The heat dissipation assembly 17 includes a cooling fan 171. The cooling fan 171 is fixedly installed on the outer wall of the drive shaft 11. Both the upper cover 1 and the lower cover 2 of the electric mill have through air inlets 172 at their front ends, located outside the cooling fan 171. Both the upper cover 1 and the lower cover 2 have through exhaust holes 173 in their middle portions, located outside the electric mill motor 8. The rear cover 4 of the electric mill has a through groove 174 to better form an airflow circuit for cooling and heat dissipation. In addition, a stop pin 175 is slidably installed inside the front end of the upper cover 1 of the electric mill. A spring 176 is sleeved on the outside of the stop pin 175, and the two ends of the spring 176 are fixedly installed between the stop pin 175 and the upper cover 1 of the electric mill. A insertion hole 177 is opened on the drive shaft 11. The stop pin 175 and the insertion hole 177 are in the same vertical plane, which makes it easy to fix the drive shaft 11.

[0031] In this embodiment, when the electric grinder motor 8 starts and drives the drive shaft 11 to begin grinding, the cooling fan 171 also starts rotating synchronously. The rotation of the cooling fan 171 is directly driven by the rotation of the drive shaft 11, utilizing the power of the electric grinder during operation without requiring an additional power source, thus saving energy and increasing efficiency. During rotation, the cooling fan 171 generates a strong suction force, drawing external cold air into the electric grinder body through the air inlet 172. This air is drawn in from the side of the electric grinder body and flows along the internal air duct towards the electric grinder motor 8. Since the electric grinder motor 8 generates heat during operation, this heat... The flow of air raises the temperature of the surrounding air, and the flowing air can exchange heat with the hot air around the motor. After absorbing heat, the air temperature rises and the density decreases, so it continues to flow along the internal air duct. Finally, this hot air is discharged from the electric mill body through the exhaust port 173 and the through slot 174. This layout ensures that the hot air can be discharged smoothly, forming a complete airflow cycle. Through this natural convection or forced convection (with the action of the cooling fan 171, it tends to be forced convection), the heat inside the electric mill is continuously carried out, thereby effectively reducing the temperature of the electric mill body and ensuring that the electric mill can operate stably for a long time.

[0032] Furthermore, before using the electric grinder, it is sometimes necessary to fix the drive shaft 11 in order to tighten the chuck nut 15, replace the grinding head 14, or perform other maintenance operations. At this time, the user can push the stop pin 175. When the user pushes the stop pin 175, the spring 176 will be compressed, generating a certain elastic potential energy. When the stop pin 175 is aligned with the insertion hole 177 on the drive shaft 11, the stop pin 175 will be inserted into the insertion hole 177, thereby conveniently and quickly fixing the drive shaft 11 and providing convenience for the user to perform subsequent operations.

[0033] Furthermore, during the assembly process, the user aligns the positioning hole 181 on the upper cover 1 of the electric mill with the positioning post 182. The positioning post 182 slides into the positioning hole 181, ensuring that the upper cover 1 and the lower cover 2 of the electric mill maintain a precise relative position during assembly, avoiding misalignment or deviation. At the same time, the elastic block 183 fixed on the side wall of the upper cover 1 will cooperate with the auxiliary groove 184 on the lower cover 2 of the electric mill during the assembly process. As the upper cover 1 and the lower cover 2 of the electric mill gradually approach each other, the elastic block 183 will be squeezed and undergo a certain degree of elastic deformation. When the two are fully assembled, the elastic block 183 will return to its original shape and be tightly embedded in the auxiliary groove 184, thereby making the connection between the upper cover 1 and the lower cover 2 of the electric mill more secure and enhancing the structural stability of the entire electric mill.

[0034] In one embodiment of the present invention, an auxiliary component 18 is provided outside the drive shaft 11. The auxiliary component 18 includes a positioning hole 181. The upper cover 1 of the electric grinder has a positioning hole 181, and the lower cover 2 of the electric grinder is fixedly installed with a positioning post 182. The positioning post 182 slides against the inside of the positioning hole 181. Multiple sets of positioning posts 182 and positioning holes 181 are provided. In addition, an elastic block 183 is fixedly installed on the side wall of the upper cover 1 of the electric grinder, and an auxiliary groove 184 is provided on the lower cover 2 of the electric grinder. The elastic block 183 slides against the inside of the auxiliary groove 184 to facilitate the assembly of the electric grinder. The upper cover 1 and the lower cover 2 of the electric grinder are equipped with rotating snap-fits 185 at both the front and rear ends. The front cover 3 and the rear cover 4 of the electric grinder are provided with rotating slots 186, and the rotating snap-fits 185 are engaged inside the rotating slots 186 to facilitate the assembly of the front cover 3 and the rear cover 4 of the electric grinder. In addition, the bottom box 163 of the dust collection module and the top cover 166 of the dust collection module are provided with stops 187. The front exterior of the upper cover 1 and the lower cover 2 of the electric grinder are provided with protrusions 188 to prevent slippage during use and to conform to grip and force-bearing habits.

[0035] In this embodiment, when assembling the front cover 3 and rear cover 4 of the electric grinder, the rotating latches 185 at both ends of the upper cover 1 and lower cover 2 of the electric grinder cooperate with the rotating slots 186 on the front cover 3 and rear cover 4 of the electric grinder. During assembly, the user first aligns the rotating slots 186 of the front cover 3 or rear cover 4 of the electric grinder with the corresponding rotating latches 185 on the upper cover 1 and lower cover 2 of the electric grinder, and then gently rotates the front cover 3 or rear cover 4 of the electric grinder so that the rotating latches 185 gradually engage with the rotating slots 186. This not only facilitates the assembly operation, but also ensures that the front cover 3 or rear cover 4 of the electric grinder fits tightly with the main body of the electric grinder after installation, ensuring the overall appearance integrity and structural stability of the electric grinder.

[0036] Furthermore, when closing the top cover 166 of the vacuum module, the user aligns the stop 187 of the top cover 166 of the vacuum module with the stop 187 on the bottom box 163 of the vacuum module, and then lowers the top cover 166 of the vacuum module to achieve precise docking between the two. The design of the stop 187 ensures that the top cover 166 of the vacuum module fits tightly with the bottom box 163 of the vacuum module after installation, effectively preventing dust leakage and improving the working efficiency of the vacuum module.

[0037] Furthermore, the raised dots 188 significantly increase the friction when the user holds the electric grinder. When the user holds the electric grinder for work, the raised dots 188 will make close contact with the user's palm skin, increasing the friction between the palm and the electric grinder, making the electric grinder less prone to slipping during use. At the same time, the raised dots 188 conform to ergonomic principles, better adapting to the human body's grip and force habits, making the user more comfortable during long periods of holding the electric grinder, reducing hand fatigue, thereby improving the practicality of the electric grinder and the user experience.

[0038] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A straight-handle electric grinder with a front-mounted dust extraction module, comprising an upper cover (1) of the grinder, a lower cover (2) of the grinder attached to the side wall of the upper cover (1), a front cover (3) of the grinder and the lower cover (2) being snapped together at their front ends, and a rear cover (4) of the grinder and the lower cover (2) being snapped together at their rear ends, wherein the upper cover (1) is provided with a grinder switch button (5), a speed control indicator light (6), and a grinder charging interface (7) arranged sequentially from front to back, and a grinder motor (8) is snapped into the lower cover (2). The electric mill battery (9) and electric mill circuit board (10) are provided. The output end of the electric mill motor (8) is fixedly connected to one end of the transmission shaft (11). The transmission shaft (11) is fixedly installed inside one side of the bearing (12). The outer side of the bearing (12) is fixedly installed on the inner wall of the lower cover (2) of the electric mill. The other end of the transmission shaft (11) is fixedly installed with one end of the clamp (13). The other end of the clamp (13) is fitted with an electric mill head (14). The clamp (13) is threaded with a collet nut (15). The electric mill head (14) passes through the collet nut (15). The feature is that: The upper cover (1) of the electric grinder is provided with a dust collection component (16), the dust collection component (16) comprising: The upper cover (1) and lower cover (2) of the electric grinder are both provided with grooves (161) on the front exterior. A boss (162) is slidably fitted inside the groove (161). The boss (162) is fixedly installed on one end of the dust collection module base box (163). A dust collection port (1640) is provided at the other end of the dust collection module base box (163). A dovetail groove (1641) is provided inside the dust collection module base box (163). The dovetail groove (1641) has a dovetail block (1642) that slides and fits inside. The dovetail block (1642) is fixedly installed on the dust collection chamber (1643). The dust collection chamber (1643) is fitted inside the bottom box (163) of the dust collection module. The dust collection chamber (1643) has a fixing slot (1644) inside. The bottom box (163) of the dust collection module has one end of the top cover (166) of the dust collection module that is hinged to the outside of the bottom box (163) of the dust collection module through a hinge rod (165). The vacuum module top cover (166) has a movable slot (1660) inside. The vacuum module bottom box (163) has an iron sheet (167) fixedly installed inside. The vacuum module top cover (166) has a magnet (168) fixedly installed inside the other end. The iron sheet (167) is attached to the magnet (168). The vacuum module bottom box (163) has a vacuum module motor (169) and a vacuum module battery (1610) snapped inside. The vacuum module motor (169) and vacuum module battery (1610) are attached to the outside of the vacuum module motor (169) and vacuum module battery (1610). The snap ring (1611) is fixedly connected to the vacuum module bottom box (163) by screws (1612). A semi-open impeller (1613) is fixedly installed at the output end of the vacuum module motor (169). One end of the filter plate (1614) is snapped into the fixed slot (1644), and the other end of the filter plate (1614) is attached to the inside of the movable slot (1660). A through air outlet (1615) is opened on the side wall of the vacuum module base box (163). A vacuum module switch button (1616) and a vacuum module charging interface (1617) are provided on the side wall of the vacuum module base box (163). The electric mill motor (8) is provided with a heat dissipation assembly (17) on the outside. The heat dissipation assembly (17) includes a cooling fan (171). The cooling fan (171) is fixedly installed on the outer wall of the drive shaft (11). The front end of the electric mill upper cover (1) and the electric mill lower cover (2) are provided with through air inlets (172). The air inlets (172) are located outside the cooling fan (171). The middle of the electric mill upper cover (1) and the electric mill lower cover (2) are provided with through exhaust holes (173). The exhaust holes (173) are located outside the electric mill motor (8). The electric mill rear cover (4) is provided with through slots (174). The front semi-open impeller (1613) includes a rear cover plate (191). One end of the rear cover plate (191) is connected to the output end of the vacuum module motor (169). The other end of the rear cover plate (191) is fixedly mounted with a hub (192). The hub (192) is fixedly mounted with main blades (193) and diverter blades (194). There are multiple sets of main blades (193) and diverter blades (194), and the multiple sets of main blades (193) and diverter blades (194) are arranged in an alternating circular array with equal spacing.

2. A straight-shank electric mill with a front-mounted dust extraction module according to claim 1, characterized in that: The electric mill switch button (5), speed control indicator (6), electric mill charging interface (7), electric mill motor (8), electric mill battery (9) and electric mill circuit board (10) are electrically connected, and the speed control indicator (6) is provided in multiple sets.

3. A straight-shank electric mill with a front-mounted dust extraction module according to claim 1, characterized in that: The groove (161) and boss (162) are provided in multiple sets, and the multiple sets of groove (161) and boss (162) are arranged in a circumferential array with equal spacing. The dovetail groove (1641) and dovetail block (1642) are provided in two sets. The filter plate (1614) is provided in multiple sets. The vacuum module motor (169) and vacuum module battery (1610), vacuum module switch button (1616) and vacuum module charging interface (1617) are electrically connected.

4. A straight-shank electric mill with a front-mounted dust extraction module according to claim 3, characterized in that: A stop pin (175) is slidably installed inside the front end of the upper cover (1) of the electric mill. A spring (176) is sleeved on the outside of the stop pin (175), and the two ends of the spring (176) are fixedly installed between the stop pin (175) and the upper cover (1) of the electric mill. A socket (177) is opened on the drive shaft (11). The stop pin (175) and the socket (177) are in the same vertical plane.

5. A straight-shank electric mill with a front-mounted dust extraction module according to claim 1, characterized in that: An auxiliary component (18) is provided on the outside of the drive shaft (11). The auxiliary component (18) includes a positioning hole (181). The upper cover (1) of the electric mill is provided with a positioning hole (181). A positioning column (182) is fixedly installed on the lower cover (2) of the electric mill. The positioning column (182) slides and fits inside the positioning hole (181). There are multiple sets of positioning columns (182) and positioning holes (181).

6. A straight-shank electric mill with a front-mounted dust extraction module according to claim 5, characterized in that: An elastic block (183) is fixedly installed on the side wall of the upper cover (1) of the electric mill, and an auxiliary groove (184) is provided on the lower cover (2) of the electric mill. The elastic block (183) slides and fits inside the auxiliary groove (184).

7. A straight-shank electric mill with a front-mounted dust extraction module according to claim 6, characterized in that: The upper cover (1) and lower cover (2) of the electric mill are both fixedly installed with rotating slots (185) at both ends. The front cover (3) and rear cover (4) of the electric mill are both provided with rotating slots (186). The rotating slots (185) are engaged inside the rotating slots (186).

8. A straight-shank electric mill with a front-mounted dust extraction module according to claim 7, characterized in that: Both the bottom box (163) and the top cover (166) of the dust collection module are provided with a stop (187), and both the front end of the upper cover (1) and the lower cover (2) of the electric grinder are provided with a protrusion (188).

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