Handheld electric drill

Abstract

The invention relates to the technical field of electric drills, and discloses a handheld electric drill which comprises a shell and a chuck arranged on the left side of the shell and used for assembling a drill bit, and further comprises a protection assembly arranged in the shell. The right side of the chuck is fixedly connected with a main shaft, and the right end of the main shaft extends into the shell; the protection assembly comprises a protection sleeve shell fixedly assembled on the inner wall of the shell. According to the handheld electric drill, the main shaft which shakes and deviates is effectively restrained through the elastic force effect of the balance spring and the counter-acting force of the damping liquid to the damping plate, so that shaking of the drill bit and the main shaft is effectively restrained, and then the stability and accuracy of the electric drill in the drilling process can be guaranteed; and through the arrangement, a response can be immediately made when the main shaft slightly shakes, it is ensured that the electric drill keeps a stable rotating state and a balanced moving track in the continuous drilling operation through an accurate balance mechanism, and through the timely and effective shaking restraining capacity, the drilling precision and consistency are greatly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of electric drills, and in particular relates to a handheld electric drill. Background Art

[0002] An electric drill is a drilling tool powered by an AC power source or a DC battery. It is a type of handheld power tool. Handheld electric drills are easy to use and are widely used in construction, decoration, furniture and other industries to make holes in objects or penetrate objects.

[0003] However, in long-term, high-intensity drilling operations, traditional handheld electric drills generally face a technical difficulty, namely, the jitter problem of the drill bit and the spindle during high-speed rotation caused by various factors. Specifically, the spindle design of traditional handheld electric drills often focuses on the basic transmission function, and lacks special protection measures against the jitter phenomenon. During the long-term use of the electric drill, due to the influence of various factors such as drill bit wear, spindle imbalance, motor performance fluctuations or changes in the external working environment, the drill bit and the spindle are very likely to have varying degrees of jitter. This jitter not only directly reduces the drilling accuracy and surface quality, but also aggravates the wear of the drill bit and the spindle, and shortens the overall service life of the tool. In addition, long-term jitter may also cause loosening or damage to the internal components of the electric drill, further increasing the failure rate and maintenance cost of the electric drill; therefore, there are deficiencies and cannot meet the user's usage needs. Therefore, it is necessary to further improve it. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a handheld electric drill, which is achieved by the following specific technical means:

[0005] A handheld electric drill comprises a housing, a chuck arranged on the left side of the housing for assembling a drill bit, and a protective component arranged inside the housing;

[0006] The right side of the chuck is fixedly connected with a main shaft, and the right end of the main shaft extends into the interior of the housing;

[0007] The protection assembly comprises a protection sleeve shell fixedly mounted on the inner wall of the housing, a fixing frame and two electromagnet rings are fixedly mounted inside the protection sleeve shell, and the two electromagnet rings are fixedly mounted on the inner wall of the protection sleeve shell;

[0008] A balancing mechanism for balancing and calibrating the main shaft is arranged inside the protective shell and between the two electromagnet rings, and adjustment mechanisms for balancing and correcting the shaking main shaft are arranged on both the left and right sides of the balancing mechanism.

[0009] As a further description of the above technical solution: through the setting of the balancing mechanism, the jitter offset of the spindle can be effectively suppressed, thereby effectively suppressing the jitter of the drill bit and the spindle, thereby ensuring the stability and accuracy of the electric drill during the drilling process, and through this setting, it can respond immediately when the spindle has a slight jitter, and through the precise balancing mechanism, it can effectively suppress the further development of the jitter, ensuring that the electric drill maintains a stable rotation state and a balanced running trajectory during continuous drilling operations. This timely and effective jitter suppression capability greatly improves the accuracy and consistency of drilling.

[0010] Furthermore, a driving motor is arranged inside the housing, a movable gear rod is fixedly connected to the left side of the driving motor by means of an output shaft, a transmission gear plate is meshedly connected to the upper side of the movable gear rod, and the transmission gear plate is fixedly assembled with the right end of the main shaft;

[0011] Wherein, a stepless speed regulating switch for electrically controlling the driving motor is arranged inside the shell, and the driving motor is driven to control the rotation speed of the chuck and the drill bit by pressing the stepless speed regulating switch.

[0012] As a further description of the above technical solution: the output shaft of the driving motor is used to drive the movable gear rod to rotate, and the meshing transmission between the movable gear rod and the transmission gear plate is used to drive the chuck and the drill bit to rotate, thereby realizing the rotational drive of the drill bit, and the speed of the drill bit is controlled by the degree of pressing the stepless speed regulation switch, which is beneficial to the construction operation of the electric drill and further improves its applicability.

[0013] Furthermore, the balancing mechanism includes a balancing shell fixedly mounted on the inner wall of the protective shell, a balancing rod being slidably mounted on one end of the balancing shell, a balancing plate for balancing and calibrating the main shaft being fixedly mounted on one end of the balancing rod away from the balancing shell, and a plurality of movable balls are provided on a side of the balancing plate away from the balancing rod, and the movable balls are in close contact with the main shaft.

[0014] As a further description of the above technical solution: the setting of the balance plate can enhance the stability of the spindle during rotation, and can effectively suppress the jitter and deviation of the spindle, thereby ensuring the stability and accuracy of the electric drill during the drilling process, and the setting of the movable ball can reduce the influence of the balance plate on the rotation of the spindle.

[0015] Furthermore, the balancing mechanism also includes a balancing inner shell arranged inside the balancing outer shell, one end of the balancing rod away from the balancing plate extends to the inside of the balancing outer shell and is fixedly connected to the balancing inner shell, and a balancing spring is fixedly connected between the upper side of the balancing inner shell and the inner top wall of the balancing outer shell.

[0016] As a further description of the above technical solution: the elastic force of the balance spring can effectively suppress the jitter and deviation of the main shaft, thereby ensuring the stability and accuracy of the electric drill during the drilling process.

[0017] Furthermore, a damping assembly is provided inside the balancing shell, and the damping assembly includes a damping rod fixedly mounted on the inner top wall of the balancing shell, the lower end of the damping rod extends into the interior of the balancing inner shell and is fixedly connected to the damping plate, and a through hole is provided on the damping plate;

[0018] Wherein, damping fluid is arranged inside the balancing inner shell.

[0019] As a further description of the above technical solution: This setting can respond immediately when the spindle has a slight shake, and through a precise balancing mechanism, it can effectively suppress the further development of the shake, ensuring that the electric drill maintains a stable rotation state and a balanced running trajectory during continuous drilling operations.

[0020] Furthermore, an electrode sheet assembly is also provided inside the balancing shell, and the electrode sheet assembly includes a first electrode sheet fixedly mounted on the top of the balancing inner shell, and a second electrode sheet fixedly mounted on the inner top wall of the balancing shell, and the first electrode sheet and the second electrode sheet are electrically connected to the electromagnet ring.

[0021] As a further description of the above technical solution: by moving the balancing inner shell, the first electrode sheet is driven to move synchronously, so that the first electrode sheet and the second electrode sheet are brought into contact with each other, thereby sending out an electrical signal, driving the electromagnet ring to energize and generate magnetism, and generating a magnetic field force that repels the magnet block.

[0022] Furthermore, the adjustment mechanism includes an adjustment shell fixedly mounted on a fixing frame, and a through opening is opened at one end of the adjustment shell facing the electromagnet ring, a magnet block is arranged inside the adjustment shell, an adjustment main rod is fixedly installed on the side of the magnet block away from the electromagnet ring, an end of the adjustment main rod away from the magnet block extends to the outside of the adjustment shell and is fixedly connected to the adjustment head, and a buffer assembly is arranged between the adjustment main rod and the adjustment head;

[0023] Wherein, a return spring is arranged on the outer peripheral sleeve of the adjusting main rod.

[0024] As a further description of the above technical solution: This setting can balance and correct the shaking spindle to offset the unbalanced force, ensuring that the drill bit and the spindle always remain in a stable rotational balance state during rotation. This setting effectively reduces potential safety hazards caused by shaking, further improving the safety of operations.

[0025] Furthermore, a limiting slide block is fixedly mounted on the outer periphery of the magnet block, a limiting slide groove corresponding to the limiting slide block is provided on the inner wall of the adjusting shell, and the limiting slide block is located in the limiting slide groove.

[0026] As a further description of the above technical solution: this arrangement can enhance the stability of the magnet block and the adjusting rod during movement on the one hand, and can limit the movement of the magnet block and the adjusting rod on the other hand.

[0027] Furthermore, a movable rod is fixedly installed on one side of the adjusting head facing the adjusting main rod, and an adjusting ball is movably arranged on the adjusting head;

[0028] Wherein, an inner cavity is opened in the adjusting main rod, and an end of the movable rod away from the adjusting head extends into the inner cavity of the adjusting main rod.

[0029] As a further description of the above technical solution: by adjusting the main rod to drive the adjusting head to correct the shaking main shaft, the shaking main shaft can be balanced and corrected. At the same time, the setting of the adjusting ball can avoid the adjustment head from affecting the rotation of the main shaft.

[0030] Furthermore, the buffer assembly includes an elastic corrugated rubber ring, which is located at the outer periphery of the movable rod and fixedly connected to the adjusting main rod and the adjusting head. The buffer assembly also includes a first buffer magnet and a second buffer magnet arranged in the cavity inside the adjusting main rod. The first buffer magnet is fixedly assembled on the movable rod, and the second buffer magnet is fixedly assembled on the top wall of the cavity inside the adjusting main rod. The opposite sides of the first buffer magnet and the second buffer magnet have the same magnetic properties, and there is a repulsive magnetic field force between the first buffer magnet and the second buffer magnet.

[0031] As a further description of the above technical solution: This setting can effectively absorb pressure and disperse impact force during the contact between the adjustment head and the main shaft, thereby effectively reducing the risk of damage caused by direct impact, and playing a role of force unloading and buffering during the correction process.

[0032] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0033] 1. The handheld electric drill, through the cooperation of the protective component and the balancing mechanism, realizes effective suppression of the jittered and deviated spindle through the elastic force of the balancing spring and the reaction force of the damping fluid on the damping plate, thereby effectively suppressing the jitter of the drill bit and the spindle, thereby ensuring the stability and accuracy of the electric drill during the drilling process, solving the problem that the jitter of the drill bit and the spindle affects the accuracy and surface quality of the drilling, and through this setting, it can respond immediately when the spindle has a slight jitter, and through the precise balancing mechanism, effectively suppress the further development of the jitter, ensuring that the electric drill maintains a stable rotation state and a balanced running trajectory during continuous drilling operations. This timely and effective jitter suppression capability greatly improves the accuracy and consistency of drilling.

[0034] 2. The handheld electric drill, through the cooperation of the protective component, the balancing mechanism and the adjusting mechanism, drives the adjusting head to correct the shaking main shaft by adjusting the main rod, thereby achieving balanced correction of the shaking main shaft to offset the unbalanced force and ensure that the drill bit and the main shaft always maintain a stable rotating balanced state during the rotation process. This process does not require human intervention and is fast and accurate. The electric drill can be quickly restored to a balanced state to ensure stable operation. This setting effectively reduces potential safety hazards caused by shaking, further improves the safety of the operation, and significantly extends the service life of the electric drill.

[0035] 3. When the force acting on the main shaft and the adjusting head is large, the handheld electric drill can relieve and buffer the pressure on the adjusting head based on the repulsive magnetic force between the first buffer magnet and the second buffer magnet. This setting can absorb the pressure and disperse the impact force during the contact between the adjusting head and the main shaft, thereby effectively reducing the risk of damage caused by direct impact, and playing a role of force relief and buffering during the correction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0037] Figure 1 It shows a schematic diagram of an overall three-dimensional structure provided according to an embodiment of the present invention;

[0038] Figure 2 A schematic diagram of the internal structure of a housing provided in an embodiment of the present invention is shown;

[0039] Figure 3 A schematic diagram of the installation structure of the driving motor and the chuck provided in an embodiment of the present invention is shown;

[0040] Figure 4 A schematic diagram of the installation structure of the protection component and the main shaft provided in an embodiment of the present invention is shown;

[0041] Figure 5 A schematic diagram of the internal structure of a protection component provided according to an embodiment of the present invention is shown;

[0042] Figure 6 The embodiment of the present invention provides Figure 5 The enlarged schematic diagram of part A in the middle;

[0043] Figure 7 The schematic diagram of the local structure of the balancing mechanism provided in the embodiment of the present invention is shown. Figure 1 ;

[0044] Figure 8 The schematic diagram of the local structure of the balancing mechanism provided in the embodiment of the present invention is shown. Figure 2 ;

[0045] Fig. 9 A schematic diagram of the internal structure of the adjustment mechanism provided according to an embodiment of the present invention is shown;

[0046] Fig.10 A schematic diagram of the installation structure of the adjusting main rod and the adjusting head provided according to an embodiment of the present invention is shown.

[0047] Legend:

[0048] 10. Housing; 11. Chuck; 111. Spindle; 12. Driving motor; 13. Movable gear rod; 14. Transmission gear plate; 15. Stepless speed regulating switch;

[0049] 20. Protective assembly; 21. Protective cover; 22. Fixing bracket; 23. Electromagnetic ring;

[0050] 30. balancing mechanism; 31. balancing housing; 32. balancing rod; 33. balancing plate; 331. movable ball; 34. balancing inner housing; 35. balancing spring; 36. damping assembly; 361. damping rod; 362. damping plate; 363. through hole; 37. electrode sheet assembly; 371. first electrode sheet; 372. second electrode sheet;

[0051] 40. Adjustment mechanism; 41. Adjustment housing; 411. Limiting slide groove; 42. Magnet block; 421. Limiting slider; 43. Adjustment main rod; 44. Buffer assembly; 441. Elastic corrugated rubber ring; 442. First buffer magnet; 443. Second buffer magnet; 45. Adjustment head; 451. Movable rod; 452. Adjustment ball; 46. Return spring. DETAILED DESCRIPTION

[0052] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0053] See also Figures 1 to 10 A handheld electric drill comprises a housing 10, a chuck 11 arranged on the left side of the housing 10 for assembling a drill bit, and a protective assembly 20 arranged inside the housing 10; a spindle 111 is fixedly connected to the right side of the chuck 11, and the right end of the spindle 111 extends to the inside of the housing 10; the protective assembly 20 comprises a protective sleeve 21 fixedly mounted on the inner wall of the housing 10, a fixing frame 22 and two electromagnet rings 23 are fixedly installed inside the protective sleeve 21, and the two electromagnet rings 23 are fixedly mounted on the inner wall of the protective sleeve 21; the electromagnet ring 23 is an electromagnet structure that generates magnetism when powered on in the prior art, and both the electromagnet and the magnet have magnetism, can attract iron objects, and have two magnetic poles, namely the N pole and the S pole; the magnetism of the magnet is fixed, while the magnetism of the electromagnet can be controlled by the presence, size and direction of the current, including the direction of the magnetic pole can also be changed; when the electromagnet is powered on, it will generate a magnetic field like a magnet, and when the magnetic poles of the electromagnet and the magnetic poles of the magnet are the same, a repulsive force will be generated between them.

[0054] A balancing mechanism 30 for balancing and calibrating the spindle 111 is arranged inside the protective shell 21 and between the two electromagnet rings 23, and adjustment mechanisms 40 for balancing and correcting the shaking spindle 111 are arranged on the left and right sides of the balancing mechanism 30; the balancing mechanism 30 is used to effectively suppress the shaking and offset of the spindle 111, thereby effectively suppressing the shaking of the drill bit and the spindle 111, thereby ensuring the stability and accuracy of the electric drill during the drilling process, and through this setting, it can respond immediately when the spindle 111 shakes slightly, and through the precise balancing mechanism, it can effectively suppress the further development of the shaking, ensuring that the electric drill maintains a stable rotation state and a balanced running trajectory during continuous drilling operations. This timely and effective shaking suppression capability greatly improves the accuracy and consistency of drilling.

[0055] See also Figures 1 to 3A driving motor 12 is arranged inside the housing 10, and a movable gear rod 13 is fixedly connected to the left side of the driving motor 12 by an output shaft, and a transmission gear disc 14 is meshed and connected to the upper side of the movable gear rod 13, and the transmission gear disc 14 is fixedly assembled with the right end of the main shaft 111; wherein, a stepless speed regulating switch 15 for electrically controlling the driving motor 12 is arranged inside the housing 10, and the driving motor 12 is driven to control the rotation speed of the chuck 11 and the drill bit by pressing the stepless speed regulating switch 15; the output shaft of the driving motor 12 is used to drive the movable gear rod 13 to rotate, and the meshing transmission of the movable gear rod 13 and the transmission gear disc 14 is used to drive the chuck 11 and the drill bit to rotate, thereby realizing the rotation drive of the drill bit, and the speed of the drill bit is controlled by the degree of pressing the stepless speed regulating switch 15, which is beneficial to the construction operation of the electric drill.

[0056] See also Figures 4 to 8 The balancing mechanism 30 includes a balancing shell 31 fixedly assembled on the inner wall of the protective shell 21, a balancing rod 32 is slidably mounted on one end of the balancing shell 31, a balancing plate 33 for balancing and calibrating the spindle 111 is fixedly mounted on one end of the balancing rod 32 away from the balancing shell 31, and a plurality of movable balls 331 are arranged on the side of the balancing plate 33 away from the balancing rod 32, and the movable balls 331 are in close contact with the spindle 111; the arrangement of the balancing plate 33 can enhance the stability of the spindle 111 during rotation, and at the same time can effectively suppress the jitter and deviation of the spindle 111, thereby ensuring the stability and accuracy of the electric drill during the drilling process, and the arrangement of the movable balls 331 can reduce the influence of the balancing plate 33 on the rotation of the spindle 111.

[0057] See also Figures 7 and 8 The balancing mechanism 30 also includes a balancing inner shell 34 arranged inside the balancing outer shell 31. One end of the balancing rod 32 away from the balancing plate 33 extends to the inside of the balancing outer shell 31 and is fixedly connected to the balancing inner shell 34. A balancing spring 35 is fixedly connected between the upper side of the balancing inner shell 34 and the inner top wall of the balancing outer shell 31. The elastic force of the balancing spring 35 can effectively suppress the jitter and deviation of the main shaft 111, thereby ensuring the stability and accuracy of the electric drill during the drilling process.

[0058] See also Figures 7 and 8A damping assembly 36 is arranged inside the balancing shell 31. The damping assembly 36 includes a damping rod 361 fixedly assembled on the inner top wall of the balancing shell 31. The lower end of the damping rod 361 extends to the inside of the balancing inner shell 34 and is fixedly connected to the damping plate 362. A through hole 363 is opened on the damping plate 362. The balancing inner shell 34 is provided with a damping fluid. In the process of pushing the balancing inner shell 34 to move by the balancing rod 32, the damping plate 362 is prompted to squeeze the damping fluid inside the balancing inner shell 34. The viscous resistance of the damping fluid is used to attenuate the kinetic energy of the moving machine, so as to achieve the purpose of attenuating the shaking and deflection force of the balancing rod 32 and the balancing plate 33. Then, the reaction force of the damping fluid on the damping plate 362 is used to effectively suppress the shaking and deflection of the main shaft 111, thereby effectively suppressing the shaking of the drill bit and the main shaft 111, thereby ensuring the stability and accuracy of the electric drill during the drilling process, and at the same time ensuring that the electric drill maintains a stable rotation state and a balanced running trajectory during continuous drilling operations.

[0059] See also Figures 7 and 8 An electrode sheet assembly 37 is also provided inside the balancing shell 31. The electrode sheet assembly 37 includes a first electrode sheet 371 fixedly mounted on the top of the balancing inner shell 34, and a second electrode sheet 372 fixedly mounted on the inner top wall of the balancing shell 31. The first electrode sheet 371 and the second electrode sheet 372 are electrically connected to the electromagnet ring 23. When the balancing inner shell 34 moves, the first electrode sheet 371 is driven to move synchronously, so that the first electrode sheet 371 and the second electrode sheet 372 are in contact with each other, thereby sending out an electrical signal, driving the electromagnet ring 23 to be energized to generate magnetism, and generating a magnetic field force that repels the magnet block 42.

[0060] See also Figure 5 to Figure 6 , Figures 9 and 10 The adjusting mechanism 40 includes an adjusting shell 41 fixedly assembled on the fixing frame 22, and a through opening is opened at one end of the adjusting shell 41 facing the electromagnet ring 23, a magnet block 42 is arranged inside the adjusting shell 41, and an adjusting main rod 43 is fixedly installed on the side of the magnet block 42 away from the electromagnet ring 23, and the end of the adjusting main rod 43 away from the magnet block 42 extends to the outside of the adjusting shell 41 and is fixedly connected with an adjusting head 45, and a buffer assembly 44 is arranged between the adjusting main rod 43 and the adjusting head 45; wherein, a return spring 46 is sleeved on the outer periphery of the adjusting main rod 43; the magnet block 42 is pushed to move by the magnetic force, and at the same time, the adjusting main rod 43 is used to drive the adjusting head 45 to correct the shaking main shaft 111, thereby realizing the balance correction of the shaking main shaft 111 to offset the unbalanced force, and ensure that the drill bit and the main shaft 111 always maintain a stable rotation balance state during the rotation process, and the potential safety hazards caused by shaking are effectively reduced through this setting.

[0061] See also Fig. 9A limiting slider 421 is fixedly installed on the outer periphery of the magnet block 42, and a limiting groove 411 corresponding to the limiting slider 421 is opened on the inner wall of the adjusting shell 41, and the limiting slider 421 is located in the limiting groove 411; through the setting of the limiting slider 421, the movement of the magnet block 42 drives the limiting slider 421 to move synchronously, and makes the limiting slider 421 slide in the limiting groove 411. Through this setting, on the one hand, the stability of the magnet block 42 and the adjusting rod during movement can be enhanced, and on the other hand, the movement of the magnet block 42 and the adjusting rod can be limited.

[0062] See also Figures 9 and 10 A movable rod 451 is fixedly installed on the side of the adjusting head 45 facing the adjusting main rod 43, and an adjusting ball 452 is movably arranged on the adjusting head 45; wherein, an inner cavity is opened in the adjusting main rod 43, and one end of the movable rod 451 away from the adjusting head 45 extends into the inner cavity of the adjusting main rod 43; the adjusting head 45 is driven by the adjusting main rod 43 to correct the shaking main shaft 111, thereby achieving balance correction of the shaking main shaft 111, and at the same time, the setting of the adjusting ball 452 can prevent the adjusting head 45 from affecting the rotation of the main shaft 111.

[0063] See also Fig.10 The buffer assembly 44 includes an elastic corrugated rubber ring 441, which is located on the outer periphery of the movable rod 451 and is fixedly connected to the adjusting main rod 43 and the adjusting head 45. The buffer assembly 44 also includes a first buffer magnet 442 and a second buffer magnet 443 arranged in the inner cavity of the adjusting main rod 43. The first buffer magnet 442 is fixedly assembled on the movable rod 451, and the second buffer magnet 443 is fixedly assembled on the top wall of the inner cavity of the adjusting main rod 43. The opposite sides of the first buffer magnet 442 and the second buffer magnet 443 have the same magnetic properties, and There is a repulsive magnetic field force between the first buffer magnet 442 and the second buffer magnet 443; when the force acting when the main shaft 111 contacts the adjusting head 45 is large, the pressure on the adjusting head 45 is relieved and buffered based on the repulsive magnetic force between the first buffer magnet 442 and the second buffer magnet 443, and through this setting, the pressure can be absorbed and the impact force can be dispersed during the contact between the adjusting head 45 and the main shaft 111, thereby effectively reducing the risk of damage caused by direct impact, and playing a role of force relief and buffering during the correction process.

[0064] The specific usage and function of this embodiment are as follows:

[0065] Working principle: When in use, by assembling the adapted drill bit on the electric drill chuck 11, and then pressing the stepless speed regulating switch 15, the driving motor 12 is driven to generate kinetic energy to start running, and the output shaft of the driving motor 12 is used to drive the movable gear rod 13 to rotate, and the meshing transmission of the movable gear rod 13 and the transmission gear plate 14 is used to drive the chuck 11 and the drill bit to rotate, thereby realizing the rotation drive of the drill bit, and the speed of the drill bit is controlled by the degree of pressing the stepless speed regulating switch 15, which is beneficial to the construction operation of the electric drill;

[0066] Due to the long-term operation of the electric drill, the drill bit and the spindle 111 are very likely to vibrate to varying degrees. When the drill bit and the spindle 111 vibrate slightly, the spindle 111 pushes the peripheral balance plate 33 while vibrating, and causes the balance rod 32 to push the balance inner shell 34 to slide inside the balance outer shell 31, while squeezing the balance spring 35. At the same time, the balance rod 32 pushes the balance inner shell 34 to move, prompting the damping plate 362 to squeeze the damping fluid inside the balance inner shell 34, and causing the damping fluid to flow from the through hole 363 on the damping plate 362, so that the movement is slowed down by the viscous resistance of the damping fluid. The mechanical kinetic energy is attenuated to achieve the purpose of attenuating the vibration and deviation of the balance rod 32 and the balance plate 33. The elastic force of the balance spring 35 and the reaction force of the damping fluid on the damping plate 362 are used to effectively suppress the vibration and deviation of the spindle 111, thereby effectively suppressing the vibration of the drill bit and the spindle 111, thereby ensuring the stability and accuracy of the electric drill during the drilling process. This setting can immediately respond when the spindle 111 vibrates slightly, and through the precise balancing mechanism, effectively suppress the further development of the vibration, ensuring that the electric drill maintains a stable rotation state and a balanced running trajectory during continuous drilling operations;

[0067] In addition, when the drill bit and the main shaft 111 vibrate greatly, at this time, the balance rod 32 is driven by the force of the main shaft 111 when it vibrates to push the moving stroke of the balance inner shell 34 to be synchronously far, and the balance inner shell 34 moves while driving the first electrode sheet 371 to move synchronously, so that the first electrode sheet 371 and the second electrode sheet 372 are in contact with each other, thereby sending an electrical signal, driving the electromagnet ring 23 to be energized to generate magnetism, and generating a magnetic field force that repels the magnet block 42, and using the magnetic force to push the magnet block 42 to move, and at the same time using the adjustment main rod 43 to drive the adjustment head 45 to correct the vibrating main shaft 111, thereby achieving balance correction of the vibrating main shaft 111 to offset the unbalanced force, and ensuring that the drill bit and the main shaft 111 always maintain a stable rotating balance state during the rotation process, and through this setting, the potential safety hazards caused by the vibration are effectively reduced, and the safety of the operation is further improved;

[0068] In the process of adjusting the main rod 43 driving the adjusting head 45 to contact and correct the shaking main shaft 111, when the force acting when the main shaft 111 contacts the adjusting head 45 is large, the adjusting head 45 is prompted to squeeze and buffer the elastic corrugated rubber ring 441, and in the process of moving the adjusting head 45, the movable rod 451 is used to push the first buffer magnet 442 toward the second buffer magnet 443, and the pressure on the adjusting head 45 is relieved and buffered based on the repulsive magnetic force between the first buffer magnet 442 and the second buffer magnet 443. Through this setting, the pressure can be absorbed and the impact force can be dispersed during the contact between the adjusting head 45 and the main shaft 111, thereby effectively reducing the risk of damage caused by direct impact, so that it plays a role of force relief and buffering during the correction process.

[0069] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A handheld electric drill, comprising a housing (10), and a chuck (11) disposed on the left side of the housing (10) for assembling a drill bit, characterized in that: It also includes a protection component (20) disposed inside the housing (10); The right side of the chuck (11) is fixedly connected to a main shaft (111), and the right end of the main shaft (111) extends into the interior of the housing (10); The protection assembly (20) comprises a protection shell (21) fixedly mounted on the inner wall of the housing (10), a fixing frame (22) and two electromagnet rings (23) are fixedly mounted inside the protection shell (21), and the two electromagnet rings (23) are fixedly mounted on the inner wall of the protection shell (21); A balancing mechanism (30) for balancing and calibrating the main shaft (111) is arranged inside the protective shell (21) and between the two electromagnet rings (23), and adjustment mechanisms (40) for balancing and correcting the shaking main shaft (111) are arranged on both the left and right sides of the balancing mechanism (30).

2. A handheld electric drill according to claim 1, characterized in that: A driving motor (12) is arranged inside the housing (10); a movable gear rod (13) is fixedly connected to the left side of the driving motor (12) by means of an output shaft; a transmission gear disc (14) is meshedly connected to the upper side of the movable gear rod (13); and the transmission gear disc (14) is fixedly assembled with the right end of the main shaft (111); Wherein, a stepless speed regulating switch (15) for electrically controlling the driving motor (12) is arranged inside the housing (10), and the driving motor (12) is driven to control the rotation speed of the chuck (11) and the drill bit by pressing the stepless speed regulating switch (15).

3. A handheld electric drill according to claim 1, characterized in that: The balancing mechanism (30) comprises a balancing shell (31) fixedly mounted on the inner wall of the protective shell (21); a balancing rod (32) is slidably mounted on one end of the balancing shell (31); a balancing plate (33) for balancing and calibrating the main shaft (111) is fixedly mounted on one end of the balancing rod (32) away from the balancing shell (31); and a plurality of movable balls (331) are arranged on a side of the balancing plate (33) away from the balancing rod (32); and the movable balls (331) are in close contact with the main shaft (111).

4. A handheld electric drill according to claim 3, characterized in that: The balancing mechanism (30) further comprises a balancing inner shell (34) arranged inside the balancing outer shell (31); one end of the balancing rod (32) away from the balancing plate (33) extends into the interior of the balancing outer shell (31) and is fixedly connected to the balancing inner shell (34); a balancing spring (35) is fixedly connected between the upper side of the balancing inner shell (34) and the inner top wall of the balancing outer shell (31).

5. A handheld electric drill according to claim 4, characterized in that: A damping assembly (36) is disposed inside the balancing outer shell (31), and the damping assembly (36) comprises a damping rod (361) fixedly mounted on the inner top wall of the balancing outer shell (31), the lower end of the damping rod (361) extends into the interior of the balancing inner shell (34) and is fixedly connected to a damping plate (362), and a through hole (363) is provided on the damping plate (362); Wherein, damping fluid is arranged inside the balancing inner shell (34).

6. A handheld electric drill according to claim 4, characterized in that: An electrode sheet assembly (37) is also provided inside the balancing shell (31), and the electrode sheet assembly (37) comprises a first electrode sheet (371) fixedly mounted on the top of the balancing inner shell (34), and a second electrode sheet (372) fixedly mounted on the inner top wall of the balancing shell (31), and the first electrode sheet (371) and the second electrode sheet (372) are electrically connected to the electromagnet ring (23).

7. A handheld electric drill according to claim 1, characterized in that: The adjusting mechanism (40) comprises an adjusting shell (41) fixedly mounted on a fixing frame (22), and a through opening is provided at one end of the adjusting shell (41) facing the electromagnet ring (23), a magnet block (42) is arranged inside the adjusting shell (41), an adjusting main rod (43) is fixedly mounted on a side of the magnet block (42) away from the electromagnet ring (23), an end of the adjusting main rod (43) away from the magnet block (42) extends to the outside of the adjusting shell (41) and is fixedly connected to an adjusting head (45), and a buffer assembly (44) is arranged between the adjusting main rod (43) and the adjusting head (45); Wherein, a return spring (46) is sleeved on the outer periphery of the adjusting main rod (43).

8. A handheld electric drill according to claim 7, characterized in that: A limiting slide block (421) is fixedly mounted on the outer periphery of the magnet block (42), a limiting slide groove (411) corresponding to the limiting slide block (421) is provided on the inner wall of the adjustment housing (41), and the limiting slide block (421) is located in the limiting slide groove (411).

9. The handheld electric drill according to claim 7, characterized in that: A movable rod (451) is fixedly mounted on one side of the adjusting head (45) facing the adjusting main rod (43), and an adjusting ball (452) is movably arranged on the adjusting head (45); The adjusting main rod (43) is provided with an inner cavity, and one end of the movable rod (451) away from the adjusting head (45) extends into the inner cavity of the adjusting main rod (43).

10. A handheld electric drill according to claim 9, characterized in that: The buffer component (44) comprises an elastic corrugated rubber ring (441), wherein the elastic corrugated rubber ring (441) is located on the outer periphery of the movable rod (451) and is fixedly connected to the adjusting main rod (43) and the adjusting head (45). The buffer component (44) also comprises a first buffer magnet (442) and a second buffer magnet (443) which are arranged in the inner cavity of the adjusting main rod (43). The first buffer magnet (442) is fixedly mounted on the movable rod (451), and the second buffer magnet (443) is fixedly mounted on the top wall of the inner cavity of the adjusting main rod (43). The opposite sides of the first buffer magnet (442) and the second buffer magnet (443) have the same magnetic properties, and there is a repulsive magnetic field force between the first buffer magnet (442) and the second buffer magnet (443).

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