Dustproof and durable brushless motor type miniature bench drill

Abstract

The invention relates to the technical field of machining, in particular to a dustproof and durable brushless motor type miniature bench drill which comprises a rack, a guide column, a transmission shaft, a driving plate and a drill bit, the driving plate is slidably arranged on the guide column and the transmission shaft in a sleeving mode, a rotating shaft is arranged on the driving plate, and synchronous wheels arranged on the rotating shaft and the transmission shaft in a sleeving mode respectively are arranged on the driving plate; a first synchronous belt is arranged between the two synchronous wheels, a plurality of spline grooves are formed in the transmission shaft, a first fan is arranged at the top of the rack and is in transmission connection with the transmission shaft, air flow generated during rotation of the first fan can blow away dust on the driving plate and around the driving plate, and the dust is prevented from being accumulated on the driving plate; pollution and abrasion of dust to the miniature bench drill are reduced, and the dustproof capacity and the service life of equipment are remarkably improved. And in cooperation with the arrangement of a moving frame, a jacking frame and a power storage wheel, the load of the brushless motor is not increased when the first fan and the second fan are used for cleaning.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical processing, in particular to a dustproof and durable brushless motor type micro bench drill. Background Art

[0002] A bench drill (abbreviated as bench drill) is a machine tool dedicated to drilling, and a mini bench drill is one of the small devices. For example, Chinese patent CN217789431U discloses a mini bench drill based on a brushless motor, which includes a support seat and a main body shell; the main body shell is connected to the support seat through a longitudinal displacement adjustment mechanism, and the brushless DC motor is fixed in the main body shell through a mounting frame assembly, and the motor is connected to the drill bit integrated assembly through a transmission. The mounting frame assembly can be fine-tuned along the transverse axis of the main body shell, and the main body shell is also provided with an air inlet and a fresh air filter.

[0003] During the processing of bench drill, a lot of debris is usually generated when the workpiece contacts the drill bit. Since the structure of the mini bench drill is relatively simple and its transmission parts are mostly exposed, these debris are easy to fall into the transmission parts. Long-term accumulation will accelerate the damage of the parts and affect the life of the equipment. Although dust can be isolated by installing a cover, it often leads to poor heat dissipation.

[0004] Prior art such as Chinese patent CN215999707U discloses a debris cleaning device for a bench drill, which includes a bench drill workbench, a device body, two cover plates and a collection box. The device body is installed above the bench drill workbench, and is connected to cover plate one on the left side, which is connected to cover plate two through a connecting hinge. A collection box is installed below cover plate two, and a cleaning port is provided at the bottom of the collection box. In addition, a cooler is also provided in the device body, and cold air is blown out through a blow pipe and a dustproof plate to peel off the debris from the workbench, thereby facilitating cleaning. However, this solution increases the manufacturing cost of the bench drill because the cleaning mechanism needs to be separately equipped with a drive source and a control device. Summary of the invention

[0005] In view of the above problems, a dustproof and durable brushless motor type mini drill is provided, in which the airflow generated by the rotation of the first fan can blow away the dust on the drive plate and its surroundings, avoid dust accumulation on the drive plate, reduce dust pollution and wear on the mini drill, and significantly improve the dustproof ability and service life of the equipment. With the arrangement of the mobile frame, the lifting frame and the power storage wheel, the first fan and the second fan will not increase the load on the brushless motor when cleaning.

[0006] In order to solve the problems of the prior art, the present invention provides a dust-proof and durable brushless motor type micro bench drill, comprising a frame, a guide column, a transmission shaft, a driving plate and a drill bit, wherein the guide column is fixedly connected to the frame in a vertical state; the transmission shaft is rotatably arranged on the side of the guide column, and the axis of the transmission shaft is parallel to the axis of the guide column; the driving plate is slidably sleeved on the guide column and the transmission shaft, and a rotating shaft for driving the drill bit to rotate is arranged on the driving plate, and the drill bit is arranged on the driving plate and is connected to the rotating shaft in transmission; synchronous wheels respectively sleeved on the rotating shaft and the transmission shaft are arranged on the driving plate, a first synchronous belt is arranged between the two synchronous wheels, a plurality of spline grooves are arranged on the transmission shaft, and the synchronous wheels of the transmission shaft are slidably matched with the transmission shaft and are connected to the transmission shaft in transmission; a brushless motor for driving the rotating shaft to rotate is also arranged on the driving plate; a first fan for cleaning dust on the driving plate is arranged on the top of the frame, and the first fan is connected to the transmission shaft in transmission.

[0007] Preferably, a first bevel gear is provided at the top of the transmission shaft, a first mounting shaft whose axis is perpendicular to the axis of the transmission shaft is provided on the movable frame, a movable frame that can slide in a horizontal direction is provided on the top of the frame, the first mounting shaft is rotatably provided on the movable frame, a second bevel gear meshing with the first bevel gear is sleeved on the first mounting shaft, and the first fan is sleeved on one end of the first mounting shaft away from the second bevel gear, when the driving plate moves to the top of the frame, the movable frame moves toward the transmission shaft, so that the first bevel gear and the second bevel gear are meshed, and when the driving plate moves to the bottom of the frame, the movable frame moves away from the transmission shaft, so that the first bevel gear and the second bevel gear are separated.

[0008] Preferably, the movable frame is elastically connected to the frame, a rotatable guide wheel is provided on one end of the driving plate close to the transmission shaft, and guide bars matching the guide wheels are provided on the movable frame, and the guide bars are inclined. When the driving plate moves up, the guide wheel can slide along the guide bars, so that the movable frame slides in a horizontal direction.

[0009] Preferably, a second fan capable of cleaning dust generated during the drilling process is provided at the bottom of the frame, and the second fan is drivingly connected to the transmission shaft.

[0010] Preferably, a lifting frame that can slide along the axial direction of the transmission shaft is provided at the bottom of the frame, and a power storage wheel is provided on the lifting frame, which is transmission-connected to the transmission shaft, and a gear ring fixedly connected to the power storage wheel is provided on the power storage wheel. A second mounting shaft for driving the second fan to rotate is also provided at the bottom of the frame, and a third mounting shaft is provided beside the gear ring, and a first gear meshing with the gear ring is provided on the third mounting shaft, and a second synchronous belt is provided between the third mounting shaft and the second mounting shaft. When the moving frame approaches the transmission shaft, the lifting frame is lifted to make the power storage wheel transmission-connected to the transmission shaft, and at this time the gear ring is away from the first gear; when the moving frame is away from the transmission shaft, the lifting frame is lowered to disconnect the power storage wheel from the transmission shaft, and at this time the gear ring is meshingly connected to the first gear.

[0011] Preferably, a connecting shaft extending along its axial direction is provided at the bottom of the transmission shaft, a rotatable driving shaft is provided on the lifting frame, the power storage wheel is sleeved on the driving shaft, the driving shaft is rotatably sleeved on the connecting shaft, and key teeth matching the spline grooves of the transmission shaft are provided in the driving shaft.

[0012] Preferably, the movable frame is provided with a mounting frame extending along the axial direction of the guide column, the bottom of the mounting frame is provided with a first slide groove extending along its length direction, the lifting frame is provided with a second slide groove extending along the horizontal direction, and a rotatable first support rod is provided between the first slide groove and the second slide groove, and the two ends of the first support rod are respectively slidably matched with the first slide groove and the second slide groove, and when the movable frame slides toward the transmission shaft, it can drive the first support rod to rotate, thereby driving the lifting frame to lift.

[0013] Preferably, two guide shafts parallel to the axis of the transmission shaft are provided at the bottom of the frame, the guide shafts are located at both ends of the lifting frame, the lifting frame is sleeved on the two guide shafts and slidably cooperates with them, and an elastic telescopic rod is provided at the bottom of the lifting frame.

[0014] Preferably, a rotatable second support rod is provided at the bottom of the frame, the second support rod is arranged in a mirror-symmetrical state with the first support rod, and the end of the second support rod is slidably matched with the second sliding groove.

[0015] Preferably, the first fan is provided with a guide cover, a retractable guide tube is provided on the guide cover, a top plate is provided on the guide column, and a mounting hole matching the guide tube is provided on the top plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention sets a transmission connection between the first fan and the transmission shaft so that the airflow generated by the rotation of the first fan can blow away the dust on the driving plate and its surroundings. Especially when the driving plate is located below the first fan, the airflow of the first fan can clean more effectively, thereby avoiding dust accumulation on the driving plate, reducing dust pollution and wear on the miniature bench drill, and significantly improving the dustproof ability and service life of the equipment.

[0017] 2. In the present invention, when the drill bit contacts the workpiece, in order to transfer power to the rotating shaft in a concentrated manner so that the drill bit has sufficient torque and a stable rotation speed, the movement of the driving plate drives the sliding of the moving frame, so that when the drill bit is working, the first fan is disconnected from the transmission shaft. When the driving plate is reset to the initial position and the drill bit is out of contact with the workpiece, the rotating shaft is almost in an unloaded state. At this time, the load of the first fan is transferred to the transmission shaft. The above method not only effectively utilizes the power redundancy of the transmission shaft when it is idle, but also achieves the purpose of timely cleaning the dust of the equipment. It avoids affecting the performance of the brushless motor due to excessive load during drilling operations, and at the same time ensures the regular operation of the first fan, thereby achieving efficient dust prevention of the equipment.

[0018] 3. The present invention connects the second fan to the transmission shaft through a transmission connection, so that the second fan can generate airflow during the drilling operation, blow away the dust generated during the drill processing, and prevent the dust from accumulating at the bottom of the frame. Through the setting of the lifting frame and the power storage wheel, the second fan can automatically switch the transmission of power, ensure that the load of the brushless motor is not increased during the drill processing, and transmit the maximum power to the drill, thereby improving the processing efficiency and ensuring stable processing quality. The equipment reasonably distributes energy in the processing and non-processing states, effectively reduces the load wear of the brushless motor, and extends the service life of the equipment. Although the driving duration of the power storage wheel on the second fan is relatively short, the miniature bench drill is mainly used to process small wooden or metal workpieces, and the processing time itself is short, so the kinetic energy of the power storage wheel can basically cover most of the processing time. In this process, the second fan can effectively assist in cleaning. Even if the dust cannot be completely removed, it can reduce the accumulation of dust, so that the cleaning effect can achieve the best auxiliary purpose. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A three-dimensional schematic diagram of the dustproof and durable brushless motor mini drill Figure 1 .

[0020] Figure 2 A three-dimensional schematic diagram of the dustproof and durable brushless motor mini drill Figure 2 .

[0021] Figure 3 The present invention is a schematic diagram of the cross-sectional structure of a drill bit in an initial state in a dustproof and durable brushless motor type micro bench drill.

[0022] Figure 4 The present invention is a schematic diagram of the cross-sectional structure of a drill bit in a dustproof and durable brushless motor micro bench drill under working conditions.

[0023] Figure 5 The present invention is a three-dimensional structural diagram of a second fan, a lifting frame and a mounting frame in a dustproof and durable brushless motor type micro bench drill.

[0024] Figure 6 The present invention is a three-dimensional structural diagram of a moving frame, a guide column and a transmission shaft in a dustproof and durable brushless motor type micro bench drill.

[0025] Figure 7 The invention discloses a three-dimensional structural diagram of a driving plate, a moving frame and a first fan in a dustproof and durable brushless motor type micro bench drill.

[0026] Figure 8 The present invention is a three-dimensional structural diagram of a driving plate, a synchronous wheel and a first synchronous belt in a dustproof and durable brushless motor type micro bench drill.

[0027] Fig. 9 The present invention is a three-dimensional structural diagram of a second fan, a lifting frame and a power storage wheel in a dustproof and durable brushless motor type micro bench drill.

[0028] Fig.10 The present invention is a three-dimensional structural diagram of a lifting frame, a first support rod and a second support rod in a dustproof and durable brushless motor type micro bench drill.

[0029] Fig.11 It is an exploded view of the drive shaft, power wheel and jacking frame in a dust-proof and durable brushless motor micro bench drill.

[0030] The numbers in the figure are: 1. Frame; 11. Guide column; 111. First elastic member; 12. Fixing plate; 13. Lifting frame; 131. Power storage wheel; 1311. Gear ring; 132. Driving shaft; 1321. Key tooth; 133. Second slideway; 134. First support rod; 135. Guide shaft; 136. Telescopic rod; 137. Second support rod; 14. Third mounting shaft; 141. First gear; 142. Second synchronous belt; 15. Top plate; 151. Mounting hole; 2. Driving plate; 21. Rotating shaft; 2 11. Brushless motor; 212. Drill bit; 22. Guide wheel; 3. Transmission shaft; 31. Spline groove; 32. Synchronous wheel; 321. First synchronous belt; 33. First bevel gear; 34. Moving frame; 341. First fan; 3411. First mounting shaft; 3412. Second bevel gear; 3413. Air guide cover; 34131. Air guide pipe; 342. Guide strip; 343. Mounting frame; 3431. First slide groove; 35. Second fan; 351. Second mounting shaft; 36. Connecting shaft. DETAILED DESCRIPTION

[0031] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0032] like Figures 1 to 6 and Fig.11As shown: a dustproof and durable brushless motor type miniature bench drill, comprising a frame 1, a guide column 11, a transmission shaft 3, a driving plate 2 and a drill bit 212, wherein the guide column 11 is fixedly connected to the frame 1 in a vertical state; the transmission shaft 3 is rotatably arranged beside the guide column 11, and the axis of the transmission shaft 3 is parallel to the axis of the guide column 11; the driving plate 2 is slidably sleeved on the guide column 11 and the transmission shaft 3, and a rotating shaft 21 for driving the drill bit 212 to rotate is arranged on the driving plate 2, and the drill bit 212 is arranged on the driving plate 2 and is in transmission connection with the rotating shaft 21; The driving plate 2 is provided with synchronous wheels 32 which are respectively sleeved on the rotating shaft 21 and the transmission shaft 3, a first synchronous belt 321 is provided between the two synchronous wheels 32, a plurality of spline grooves 31 are provided on the transmission shaft 3, the synchronous wheels 32 of the transmission shaft 3 are slidably matched with the transmission shaft 3 and are transmission connected thereto; the driving plate 2 is also provided with a brushless motor 211 for driving the rotating shaft 21 to rotate; a first fan 341 for cleaning dust on the driving plate 2 is provided on the top of the frame 1, and the first fan 341 is transmission connected to the transmission shaft 3.

[0033] When the miniature bench drill is working, the brushless motor 211 is started, and the output shaft of the brushless motor 211 drives the rotation of the rotating shaft 21 connected thereto, and the rotation of the rotating shaft 21 drives the rotation of the drill bit 212, and the workpiece is drilled by the rotation of the drill bit 212. At the same time, the relative movement of the drill bit 212 and the workpiece can be achieved by sliding the driving plate 2 on the guide column 11 and the transmission shaft 3 along the axial direction of the guide column 11, so that the precision and depth of the drilling operation can be controlled. Since the transmission shaft 3 is provided with a spline groove 31, the synchronous wheel 32 is sleeved on the rotating shaft 21 and the transmission shaft 3, so that when the driving plate 2 slides on the guide column 11 and the transmission shaft 3, the synchronous wheel 32 can slide on the transmission shaft 3 while rotating, and through the provision of the first synchronous belt 321, the power of the rotating shaft 21 can be stably transmitted to the transmission shaft 3, so that the rotating shaft 21 and the transmission shaft 3 maintain synchronous movement. Through the transmission connection between the first fan 341 and the transmission shaft 3, the first fan 341 can be driven to rotate when the transmission shaft 3 rotates, and the airflow generated by the rotation of the first fan 341 can blow away the dust on and around the driving plate 2, especially when the driving plate 2 is located below the first fan 341, the airflow of the first fan 341 can be more effectively cleaned, thereby avoiding dust accumulation on the driving plate 2, reducing dust pollution and wear on the micro bench drill, and significantly improving the dustproof ability and service life of the equipment. It should be noted that a fixed plate 12 is also provided in the middle of the frame 1, and a first elastic member 111 is provided between the fixed plate 12 and the driving plate 2. Through the provision of the first elastic member 111, each time the driving plate 2 moves to the bottom of the frame 1, the first elastic member 111 drives the driving plate 2 to return to the initial height through its elastic reset, that is, returns to the top of the frame 1, so as to facilitate the next drilling operation on the workpiece. A driving arm (not shown in the figure) for driving the driving plate 2 to press down is also provided on the driving plate 2, and the driving plate 2 is driven to move by the staff holding the driving arm and pressing down.

[0034] like Figures 1 to 4 , Figures 6 to 8 As shown: a first bevel gear 33 is provided on the top of the transmission shaft 3, a first mounting shaft 3411 whose axis is perpendicular to the axis of the transmission shaft 3 is provided on the movable frame 34, a movable frame 34 that can slide in the horizontal direction is provided on the top of the frame 1, the first mounting shaft 3411 is rotatably provided on the movable frame 34, a second bevel gear 3412 meshingly connected with the first bevel gear 33 is sleeved on the first mounting shaft 3411, and the first fan 341 is sleeved on one end of the first mounting shaft 3411 away from the second bevel gear 3412, when the driving plate 2 moves to the top of the frame 1, the movable frame 34 moves toward the transmission shaft 3, so that the first bevel gear 33 and the second bevel gear 3412 are meshed, and when the driving plate 2 moves to the bottom of the frame 1, the movable frame 34 is away from the transmission shaft 3, so that the first bevel gear 33 and the second bevel gear 3412 are separated.

[0035] During the operation of the micro bench drill, the drive plate 2 slides on the guide column 11 and the transmission shaft 3. In the initial state, the drive plate 2 is located at the top of the frame 1. At this time, the movable frame 34 on the top of the frame 1 is located next to the transmission shaft 3. At this time, the first bevel gear 33 and the second bevel gear 3412 are engaged. When the transmission shaft 3 rotates, the power of the transmission shaft 3 can be transmitted to the first mounting shaft 3411 through the setting of the first bevel gear 33 and the second bevel gear 3412, thereby driving the first fan 341 at the other end of the first mounting shaft 3411 to rotate, generating a strong airflow to clean the drive plate 2 and the dust around it. When the drive plate 2 slides toward the bottom of the frame 1, the mobile frame 34 moves away from the transmission shaft 3 by sliding, and the first bevel gear 33 and the second bevel gear 3412 will move away from each other, thereby disconnecting the power transmission between the first mounting shaft 3411 and the transmission shaft 3, so that the first fan 341 stops rotating, thereby effectively controlling the cleaning process, and when the mobile frame 34 is reset after the drilling operation is completed, the mobile frame 34 will move to the side of the transmission shaft 3 again. Through the meshing connection of the first bevel gear 33 and the second bevel gear 3412, the first fan 341 is automatically started only when the drive plate 2 reaches the top of the frame 1, effectively blowing away the surrounding dust. In this way, it can be ensured that the cleaning process is only carried out when needed, reducing unnecessary fan use. The design of the mobile frame 34 makes the gear meshing process automatically associated with the movement of the drive plate 2, which is convenient to operate, does not require additional manual intervention, optimizes the automation of the cleaning process, and reduces the difficulty of operation and work intensity of workers. When the drive plate 2 rises, the first fan 341 is started to generate airflow to clean the drive shaft 132, effectively preventing dust from accumulating on key components, significantly reducing the risk of wear caused by dust, and ensuring the cleanliness of core transmission components, thereby extending the service life of the equipment and reducing the maintenance frequency.

[0036] The above design optimizes the load distribution of the brushless motor 211. Specifically, when the drill bit 212 contacts the workpiece, the brushless motor 211 transmits power to the rotating shaft 21, so that the drill bit 212 has sufficient torque and stable speed to ensure the accuracy and efficiency of the drilling operation. During this period, the first fan 341 does not participate in the transmission to avoid excessive load on the brushless motor 211. When the drive plate 2 is reset to the initial position and the drill bit 212 is out of contact with the workpiece, the rotating shaft 21 is almost in an unloaded state. At this time, the load of the first fan 341 is transmitted to the rotating shaft 21, and the fan is started by engaging the transmission shaft 3 for cleaning. In this way, not only the power redundancy of the rotating shaft 21 when it is idle is effectively utilized, but also the purpose of timely cleaning the dust of the equipment is achieved. This structural optimization not only avoids the influence of the performance of the brushless motor 211 due to excessive load during the drilling operation, but also ensures the timing operation of the first fan 341 to achieve efficient dust prevention of the equipment. This precise load management significantly improves the working stability and service life of the equipment, ensuring a balance between efficient processing and dust-proof maintenance for the micro drill.

[0037] like Figures 1 to 8 As shown: the movable frame 34 is elastically connected to the frame 1, a rotatable guide wheel 22 is provided on one end of the driving plate 2 close to the transmission shaft 3, and a guide bar 342 matching the guide wheel 22 is provided on the movable frame 34, and the guide bar 342 is inclined. When the driving plate 2 moves upward, the guide wheel 22 can slide along the guide bar 342, so that the movable frame 34 slides in the horizontal direction.

[0038] After the micro-bench drill is completed, the drive plate 2 will move and reset along the axis of the guide column 11 to the top of the frame 1. When the drive plate 2 gradually rises to a position intersecting with the guide bar 342, the guide wheel 22 on the drive plate 2 slides along the guide bar 342. Since the guide bar 342 is arranged in an inclined manner, the sliding of the guide wheel 22 will push the mobile frame 34 to slide in the horizontal direction, so that the mobile frame 34 is close to the transmission shaft 3, and the second bevel gear 3412 on the mobile frame 34 is close to the first bevel gear 33 until the two are meshed and connected. In this way, the power of the transmission shaft 3 can be transmitted to the first installation shaft 3411 through the meshed first bevel gear 33 and the second bevel gear 3412, thereby driving the first fan 341 to rotate, thereby cleaning the dust around the drive plate 2. When the drive plate 2 moves downward, the guide wheel 22 will move away from the guide bar 342. Since the mobile frame 34 is elastically connected to the frame 1, the mobile frame 34 is moved away from the transmission shaft 3, and the first bevel gear 33 and the second bevel gear 3412 are separated, and the fan stops working. By setting the guide wheel 22 and the guide bar 342 that move synchronously with the drive plate 2, the horizontal sliding of the mobile frame 34 is organically combined with the up and down movement of the drive plate 2. This structure realizes the automatic control of the engagement and disengagement of the first bevel gear 33 and the second bevel gear 3412, so that the first fan 341 is automatically started for cleaning when the drive plate 2 rises, thereby improving the dustproof performance. At the same time, this automated sliding connection does not require an additional power source, has a compact structure, and is easy to maintain. It effectively reduces dust accumulation and wear during equipment operation, and greatly extends the service life and stability of the equipment. The setting of the elastic connection provides a buffering effect for the mobile frame 34 when the drive plate 2 moves, reduces the impact on the components caused by the high-speed movement of the drive plate 2, and extends the service life of the equipment.

[0039] like Figures 1 to 5 and Fig. 9 As shown, a second fan 35 capable of cleaning dust generated during the processing of the drill bit 212 is arranged at the bottom of the frame 1 , and the second fan 35 is in driving connection with the transmission shaft 3 .

[0040] The second fan 35 is connected to the transmission shaft 3 through a transmission connection, so that when the transmission shaft 3 rotates, the power can be transmitted to the second fan 35, so that the second fan 35 rotates synchronously with the transmission shaft 3. In this way, the second fan 35 can generate airflow during the drilling operation to blow away the dust generated during the processing of the drill bit 212, and prevent the dust from accumulating at the bottom of the frame 1. This design ensures that dust will not accumulate around key components while the drilling operation is ongoing, thereby keeping the equipment clean and reducing the maintenance frequency. The rotation of the transmission shaft 3 is used to drive the cleaning fan to work, so that there is no need for an additional drive motor, which simplifies the structure and reduces the overall load of the equipment. At the same time, it prevents dust from entering the transmission components during the drilling process, thereby improving the dustproof ability and service life of the equipment.

[0041] like Figures 1 to 5 , Figures 9 to 11 As shown: the bottom of the frame 1 is provided with a lifting frame 13 that can slide along the axial direction of the transmission shaft 3, and the lifting frame 13 is provided with a power storage wheel 131, which is in transmission connection with the transmission shaft 3, and the power storage wheel 131 is provided with a gear ring 1311 fixedly connected thereto, and the bottom of the frame 1 is also provided with a second installation shaft 351 for driving the second fan 35 to rotate, and a third installation shaft 14 is provided beside the gear ring 1311, and the third installation shaft 14 is provided with a gear ring 1311 fixedly connected thereto. 1, a second synchronous belt 142 is arranged between the third installation shaft 14 and the second installation shaft 351, when the moving frame 34 approaches the transmission shaft 3, the lifting frame 13 is lifted to make the power storage wheel 131 transmission connected with the transmission shaft 3, at this time, the ring gear 1311 is separated from the first gear 141, when the moving frame 34 is separated from the transmission shaft 3, the lifting frame 13 is lowered to make the power storage wheel 131 disconnected from the transmission shaft 3, at this time, the ring gear 1311 is meshed with the first gear 141.

[0042] When the drive plate 2 moves upward, the drill bit 212 will separate from the workpiece, the mobile frame 34 will approach the transmission shaft 3, and the lifting frame 13 will rise accordingly, so that the power storage wheel 131 is connected to the transmission shaft 3, and the power input from the transmission shaft 3 is obtained. At the same time, due to the lifting of the lifting frame 13, the ring gear 1311 is disengaged from the first gear 141, thereby pausing the rotation of the second fan 35 to avoid starting the cleaning function in a non-processing state. When the drive plate 2 moves downward, the drill bit 212 will contact the workpiece, the mobile frame 34 will move away from the transmission shaft 3, and the lifting frame 13 will descend, so that the power storage wheel 131 is disconnected from the transmission shaft 3. At this time, the kinetic energy stored in the power storage wheel 131 will be released, so that the power storage wheel 131 continues to rotate for a period of time under the action of inertia, and the ring gear 1311 is meshed with the first gear 141, and the rotation of the first gear 141 drives the rotation of the third installation shaft 14, and the rotation of the third installation shaft 14 drives the rotation of the second synchronous belt 142, and the energy stored in the power storage wheel 131 is transferred to the second installation shaft 351 through the second synchronous belt 142. After obtaining kinetic energy, the second installation shaft 351 drives the second fan 35 to rotate, so as to realize the function of cleaning the dust generated by the drill bit 212 during the processing. Since the power storage wheel 131 is disconnected from the transmission shaft 3 at this time, the brushless motor 211 transfers all the power to the drill bit 212, avoiding the influence of the additional load on the transmission shaft 3, which helps to improve the processing efficiency and equipment life. The above method automatically switches the power transmission according to the working state, ensures that the load of the brushless motor 211 is not increased when the drill bit 212 is processed, and the maximum power is transferred to the drill bit 212, thereby improving the processing efficiency and ensuring the stability of the processing quality. The equipment reasonably distributes energy in the processing and non-processing states, effectively reducing the load wear of the brushless motor 211 and extending the service life of the equipment. The second fan 35 automatically operates through the kinetic energy stored in the power storage wheel 131, removes dust during the processing, keeps the workpiece surface and the processing environment clean, and helps improve the processing quality. Since the cleaning function does not operate in the non-processing state, this design effectively reduces unnecessary energy consumption, reduces the operating energy consumption of the equipment, and achieves energy saving and environmental protection.

[0043] It should be noted that the power storage wheel 131 is usually made of high-density materials such as metal, so that it has a large mass to ensure that it has a large inertia. Using the inertia retention principle, the power storage wheel 131 can store kinetic energy in a short time and achieve continuous rotation through inertia after obtaining the input of external power. When the power source is disconnected, the power storage wheel 131 can maintain the rotating state for a period of time by its own inertia, so as to continue to output kinetic energy without power input. By installing low-friction bearings, the rotation resistance of the power storage wheel 131 is significantly reduced, so that it can extend the duration of inertial rotation as much as possible before the stored kinetic energy is exhausted. Since the power storage wheel 131 is arranged at the bottom of the frame 1, it can play a better role in stabilizing the miniature bench drill, making the miniature bench drill more stable when placed on the workbench. Although the driving duration of the second fan 35 by the power storage wheel 131 is relatively short, the miniature bench drill is mainly used to process small wooden or metal workpieces, and the processing time itself is short, so the kinetic energy of the power storage wheel 131 can basically cover most of the processing time. During this process, the second fan 35 can effectively assist in cleaning. Even if the dust cannot be completely removed, it can reduce the accumulation of dust, so that the cleaning effect can achieve the best auxiliary purpose.

[0044] like Figures 1 to 5 , Figures 9 to 11 As shown: a connecting shaft 36 extending along the axial direction of the transmission shaft 3 is provided at the bottom, a rotatable driving shaft 132 is provided on the lifting frame 13, a power storage wheel 131 is sleeved on the driving shaft 132, the driving shaft 132 is rotatably sleeved on the connecting shaft 36, and a key tooth 1321 matching the spline groove 31 of the transmission shaft 3 is provided in the driving shaft 132.

[0045] When the lifting frame 13 moves upward, the key teeth 1321 of the drive shaft 132 are meshed and connected with the spline groove 31 of the transmission shaft 3, so that the power of the transmission shaft 3 is transmitted to the drive shaft 132, and the rotation of the power storage wheel 131 connected thereto is driven by the drive shaft 132. On the contrary, when the lifting frame 13 is lowered, the key teeth 1321 of the drive shaft 132 are disengaged from the spline groove 31 of the transmission shaft 3, and the power storage wheel 131 is disconnected from the transmission shaft 3, and the power storage wheel 131 continues to rotate under the action of inertia, realizing short-term independent operation. In the above manner, the power storage wheel 131 can achieve precise power connection with the transmission shaft 3 when necessary, and when driving is not required, the power storage wheel 131 is disconnected from the transmission shaft 3 by the lowering of the lifting frame 13, thereby reducing the load of the brushless motor 211. This disconnection process allows the power storage wheel 131 to operate independently under the action of inertia, ensuring that the power system can still provide short-term rotational kinetic energy support through the power storage wheel 131 when disconnected, reducing the continuous load of the power system. At the same time, with the help of the spline structure of the drive shaft 132 and the transmission shaft 3, the meshing accuracy is high, ensuring the efficiency in the power transmission process and extending the service life of the equipment.

[0046] like Figures 1 to 5 , Figures 9 to 11 As shown: the movable frame 34 is provided with a mounting frame 343 extending along the axial direction of the guide column 11, the bottom of the mounting frame 343 is provided with a first slide groove 3431 extending along its length direction, the lifting frame 13 is provided with a second slide groove 133 extending along the horizontal direction, and a rotatable first support rod 134 is provided between the first slide groove 3431 and the second slide groove 133, and the two ends of the first support rod 134 are respectively slidably matched with the first slide groove 3431 and the second slide groove 133. When the movable frame 34 slides toward the transmission shaft 3, it can drive the first support rod 134 to rotate, thereby driving the lifting frame 13 to lift.

[0047] The middle part of the first support rod 134 is rotatably arranged at the bottom of the frame 1. When the mobile frame 34 slides in the direction of the transmission shaft 3, the mobile frame 34 can drive the mounting frame 343 fixedly connected thereto, so that the mounting frame 343 slides in the horizontal direction, thereby driving the first slide groove 3431 at the bottom thereof, and pushing the first support rod 134 slidingly matched therewith through the first slide groove 3431, so that the first support rod 134 rotates around its connection point with the frame 1, thereby causing the other end of the first support rod 134 to slide in the second slide groove 133 of the jacking frame 13, driving the lifting of the jacking frame 13 and realizing the transmission connection between the power storage wheel 131 and the transmission shaft 3. When the mobile frame 34 is reset, the mounting frame 343 will drive the first support rod 134 to slide in the opposite direction, so that the other end of the first support rod 134 slides in the second slide groove 133, causing the jacking frame 13 to descend, and at this time, the power storage wheel 131 is disconnected from the transmission shaft 3.

[0048] like Figures 1 to 5 , Figures 9 to 11 As shown: two guide shafts 135 parallel to the axis of the transmission shaft 3 are provided at the bottom of the frame 1, the guide shafts 135 are located at both ends of the lifting frame 13, the lifting frame 13 is sleeved on the two guide shafts 135 and slidably cooperates with them, and an elastic telescopic rod 136 is provided at the bottom of the lifting frame 13.

[0049] The middle part of the first support rod 134 is rotatably mounted at the bottom of the frame 1. When the mobile frame 34 moves toward the transmission shaft 3, it is driven by the guide wheel 22 and the guide bar 342, and the mounting frame 343 slides in the horizontal direction, driving the first slide groove 3431 at its bottom to move, and the first support rod 134 is pushed through the first slide groove 3431, so that the first support rod 134 rotates around its connection point with the frame 1, and then the other end of the first support rod 134 slides in the second slide groove 133 of the lifting frame 13, driving the lifting frame 13 to rise and realize the transmission connection between the power storage wheel 131 and the transmission shaft 3. When the mobile frame 34 is reset, the elastic retractable rod 136 is elastically reset, and the mounting frame 343 will drive the first support rod 134 to slide in the opposite direction, and the other end of the first support rod 134 moves in the second slide groove 133, so that the lifting frame 13 descends, and at this time, the power storage wheel 131 is disconnected from the transmission shaft 3.

[0050] By controlling the lifting and lowering of the first support rod 134 and the jacking frame 13 through the sliding of the mobile frame 34, the automatic connection and separation of the power storage wheel 131 and the transmission shaft 3 is realized, the operation process is simplified, no additional control mechanism is required, and the complexity of the equipment is reduced. The sliding cooperation and rotation design of the first support rod 134 and the first slide groove 3431 and the second slide groove 133 can reduce the friction between the components and reduce the wear of the components, thereby improving the durability of the micro-bench drill and extending the service life of the equipment. During the processing, when the power storage wheel 131 is connected to the transmission shaft 3, it can smoothly drive the second fan 35 to operate, effectively remove the dust generated by the drill bit 212, improve the cleaning efficiency, and keep the micro-bench drill in a cleaner working environment. The rotation support point of the first support rod 134 is set at the bottom of the frame 1. Through the linkage of the first support rod 134 and the slide groove, the stable lifting of the jacking frame 13 is realized, the stability during the power transmission process is ensured, and the micro-bench drill runs more smoothly on the workbench.

[0051] like Figures 1 to 5 , Figures 9 to 11 As shown: a rotatable second support rod 137 is arranged at the bottom of the frame 1, the second support rod 137 and the first support rod 134 are arranged in a mirror-symmetrical state, and the end of the second support rod 137 is slidably matched with the second slide groove 133.

[0052] The symmetrical arrangement of the second support rod 137 and the first support rod 134 enables the jacking frame 13 to obtain a more uniform support force during the lifting and lowering process, avoiding the deviation and shaking caused by the unilateral force, ensuring the smooth power transmission process, and improving the stability of the bench drill. The synchronous movement of the first support rod 134 and the second support rod 137 can better support the jacking frame 13, ensure the precise docking of the power storage wheel 131 and the transmission shaft 3, and effectively improve the reliability of power transmission.

[0053] like Figures 3 to 7As shown: the first fan 341 is provided with a guide cover 3413 , the guide cover 3413 is provided with a retractable guide pipe 34131 , the guide column 11 is provided with a top plate 15 , and the top plate 15 is provided with a mounting hole 151 matching with the guide pipe 34131 .

[0054] When the movable frame 34 slides, the air guide cover 3413 will be driven to move. Since the top plate 15 and the mounting hole 151 cannot move, the air guide cover 3413 needs a retractable air guide tube 34131 to dock with the mounting hole 151 to match the displacement of the movable frame 34, so that the airflow generated by the first fan 341 can be stably guided to the drive plate 2, thereby facilitating the cleaning of the drive plate 2.

[0055] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the protection scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A dustproof and durable brushless motor type miniature bench drill, comprising a frame (1), a guide column (11), a transmission shaft (3), a drive plate (2) and a drill bit (212), characterized in that: The guide column (11) is fixedly connected to the frame (1) in a vertical state; The transmission shaft (3) is rotatably arranged beside the guide column (11), and the axis of the transmission shaft (3) is parallel to the axis of the guide column (11); The driving plate (2) is slidably sleeved on the guide column (11) and the transmission shaft (3); a rotating shaft (21) for driving the drill bit (212) to rotate is provided on the driving plate (2); the drill bit (212) is provided on the driving plate (2) and is transmission-connected to the rotating shaft (21); The drive plate (2) is provided with synchronous wheels (32) which are respectively sleeved on the rotating shaft (21) and the transmission shaft (3); a first synchronous belt (321) is provided between the two synchronous wheels (32); a plurality of spline grooves (31) are provided on the transmission shaft (3); the synchronous wheels (32) of the transmission shaft (3) are slidably matched with the transmission shaft (3) and are transmission-connected thereto; The drive plate (2) is also provided with a brushless motor (211) for driving the rotating shaft (21) to rotate; A first fan (341) for cleaning dust on the driving plate (2) is arranged on the top of the frame (1); the first fan (341) is drivingly connected to the driving shaft (3).

2. A dustproof and durable brushless motor miniature bench drill according to claim 1, characterized in that: A first bevel gear (33) is arranged on the top of the transmission shaft (3); a first mounting shaft (3411) whose axis is perpendicular to the axis of the transmission shaft (3) is arranged on the movable frame (34); a movable frame (34) capable of sliding in a horizontal direction is arranged on the top of the frame (1); the first mounting shaft (3411) is rotatably arranged on the movable frame (34); a second bevel gear (3412) meshingly connected with the first bevel gear (33) is sleeved on the first mounting shaft (3411); and a first fan (341) is sleeved on an end of the first mounting shaft (3411) away from the second bevel gear (3412). When the driving plate (2) moves to the top of the frame (1), the movable frame (34) moves toward the transmission shaft (3), so that the first bevel gear (33) and the second bevel gear (3412) are meshed. When the driving plate (2) moves toward the bottom of the frame (1), the movable frame (34) moves away from the transmission shaft (3), so that the first bevel gear (33) and the second bevel gear (3412) are separated.

3. A dustproof and durable brushless motor miniature bench drill according to claim 2, characterized in that: The movable frame (34) is elastically connected to the frame (1); a rotatable guide wheel (22) is provided at one end of the driving plate (2) close to the transmission shaft (3); a guide bar (342) matching the guide wheel (22) is provided on the movable frame (34); the guide bar (342) is inclined; when the driving plate (2) moves upward, the guide wheel (22) can slide along the guide bar (342), so that the movable frame (34) slides in the horizontal direction.

4. The dustproof and durable brushless motor miniature bench drill according to claim 2, characterized in that: A second fan (35) capable of cleaning dust generated during the processing of the drill bit (212) is arranged at the bottom of the frame (1), and the second fan (35) is in driving connection with the transmission shaft (3).

5. The dustproof and durable brushless motor miniature bench drill according to claim 4, characterized in that: The bottom of the frame (1) is provided with a lifting frame (13) that can slide along the axial direction of the transmission shaft (3); the lifting frame (13) is provided with a power storage wheel (131); the power storage wheel (131) is connected to the transmission shaft (3) in a transmission manner; the power storage wheel (131) is provided with a gear ring (1311) fixedly connected thereto; the bottom of the frame (1) is also provided with a second installation shaft (351) for driving the second fan (35) to rotate; a third installation shaft (14) is provided on the side of the gear ring (1311); the third installation shaft (14) is provided with a gear meshing with the gear ring (1311) A second synchronous belt (142) is arranged between the third mounting shaft (14) and the second mounting shaft (351); when the moving frame (34) approaches the transmission shaft (3), the lifting frame (13) is lifted so that the power storage wheel (131) is transmission-connected with the transmission shaft (3), and at this time, the ring gear (1311) is separated from the first gear (141); when the moving frame (34) is separated from the transmission shaft (3), the lifting frame (13) is lowered so that the power storage wheel (131) is disconnected from the transmission shaft (3), and at this time, the ring gear (1311) is meshingly connected with the first gear (141).

6. The dustproof and durable brushless motor miniature bench drill according to claim 5, characterized in that: A connecting shaft (36) extending along the axial direction of the transmission shaft (3) is arranged at the bottom thereof, a rotatable driving shaft (132) is arranged on the lifting frame (13), a power storage wheel (131) is sleeved on the driving shaft (132), the driving shaft (132) is rotatably sleeved on the connecting shaft (36), and key teeth (1321) matching with the spline grooves (31) of the transmission shaft (3) are arranged in the driving shaft (132).

7. The dustproof and durable brushless motor miniature bench drill according to claim 4, characterized in that: The movable frame (34) is provided with a mounting frame (343) extending along the axial direction of the guide column (11); the bottom of the mounting frame (343) is provided with a first slide groove (3431) extending along the length direction thereof; the lifting frame (13) is provided with a second slide groove (133) extending along the horizontal direction; a rotatable first support rod (134) is provided between the first slide groove (3431) and the second slide groove (133); two ends of the first support rod (134) are respectively slidably matched with the first slide groove (3431) and the second slide groove (133); when the movable frame (34) slides toward the transmission shaft (3), the first support rod (134) can be driven to rotate, thereby driving the lifting frame (13) to be lifted.

8. The dustproof and durable brushless motor miniature bench drill according to claim 7, characterized in that: The bottom of the frame (1) is provided with two guide shafts (135) which are parallel to the axis of the transmission shaft (3). The guide shafts (135) are located at two ends of the lifting frame (13). The lifting frame (13) is sleeved on the two guide shafts (135) and slidably cooperates with them. The bottom of the lifting frame (13) is provided with an elastic telescopic rod (136).

9. The dustproof and durable brushless motor miniature bench drill according to claim 7, characterized in that: A rotatable second support rod (137) is provided at the bottom of the frame (1); the second support rod (137) and the first support rod (134) are arranged in a mirror-symmetrical state; the end of the second support rod (137) is slidably matched with the second slide groove (133).

10. A dustproof and durable brushless motor miniature bench drill according to any one of claims 2 to 9, characterized in that: The first fan (341) is provided with a flow guide cover (3413), a retractable flow guide tube (34131) is provided on the flow guide cover (3413), a top plate (15) is provided on the guide column (11), and a mounting hole (151) matching the flow guide tube (34131) is provided on the top plate (15).

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