Drill pen motor having clamping structure

Abstract

The present invention provides a drill pen motor having a clamping structure, comprising a motor housing, bearings, a rotor, a stator, a collet, a collet pull rod, an elastic device, and a rotating collet opening device. The rotor consists of a motor rotating shaft and a magnet, wherein the motor rotating shaft is of a hollow structure, the collet and the collet pull rod are axially connected and then placed in the hollow motor rotating shaft, and the elastic device is arranged between the hollow motor rotating shaft and the collet pull rod. The stator consists of a silicon steel sheet and a metal coil, and is placed on the inner wall of the housing. The rotating collet opening device consists of a rotating sleeve, a collet opening seat, and a sliding block. In the present invention, a main shaft component and a motor of a clamping grinding head of a conventional drill pen are combined into one, thereby effectively solving the problems of grinding head pulsation, pen body vibration, and noise caused by complex transmission components and the difficult control of assembly tolerance of parts of conventional drill pens; and a larger battery can be placed in a saved space, thereby greatly prolonging the battery life of a wireless drill pen.

Description

Grinding pen motor with clamping structure Technical Field

[0001] The present invention relates to the technical field of polishing pen motors, in particular to a polishing pen motor with a clamping structure. Background Art

[0002] Currently, handheld sanding pens are widely used in fields such as manicure, handicraft engraving, metalworking, dentistry, and DIY crafts, offering high sanding efficiency and simple operation. However, existing handheld sanding pens are complex and have numerous components. They primarily consist of a spindle for clamping the sanding head, a motor, a battery, and a PCBA. The actual processing and assembly tolerances of these components are often difficult to control, and coaxiality cannot be guaranteed. Furthermore, sanding pens typically rotate at speeds exceeding 25,000 revolutions per minute. Consequently, existing sanding pens suffer from serious problems such as sanding head jitter, body vibration and noise, and component wear. Furthermore, battery-powered wireless handheld sanding pens, limited by the limited internal space, have a battery life of no more than 20 minutes during high-intensity sanding operations.

[0003] Summary of the Invention

[0004] In order to overcome the above problems, the present invention provides a grinding pen motor with a clamping structure, which has a simple structure, easy assembly, high coaxiality, low body vibration, low noise and long service life.

[0005] The technical solution of the present invention is to provide a grinding pen motor with a clamping structure, comprising a housing, bearings, a rotor, a stator, a tail cap, a chuck, a chuck pull rod, an elastic device, and a rotating clamping device. The rotor comprises a motor shaft and a magnet. The motor shaft is hollow. The chuck and chuck pull rod are axially connected and positioned within the motor shaft. The chuck and pull rod are connected and positioned within the hollow motor shaft. An elastic device is positioned between the hollow motor shaft and the chuck pull rod. The stator comprises silicon steel sheets and a metal coil and is positioned adjacent to the inner wall of the housing. The rotating clamping device comprises a rotating sleeve, a clamping seat, and a slider. Rotation of the rotating sleeve drives the slider to move axially along the motor. The displacement of the slider drives the chuck to open, releasing the old grinding head, and close, clamping the new grinding head in the chuck. Rotation of the rotor drives the chuck, chuck, chuck pull rod, and grinding head to rotate simultaneously.

[0006] As an improvement to the present invention, the rear cover of the motor is also a clamping seat.

[0007] As an improvement to the present invention, a thread is provided on the rear end of the rear cover of the motor and is connected to the rear handle of the grinder handle.

[0008] A further technical solution of the present invention is to assemble the polishing pen motor and the polishing pen handle shell into a polisher handle, and the polisher handle is connected to the polishing pen host through a power cord.

[0009] A further technical solution of the present invention is to assemble the polishing pen motor, battery, control circuit and polishing pen handle shell into a wireless polishing pen.

[0010] The second technical solution of the present invention is to provide a grinding pen motor with a clamping structure, including a motor housing, bearings, a rotor, a stator, a motor back cover, a chuck, a chuck pull rod, an elastic device, and a rotating clamping device. The rotor is composed of a hollow magnet. The chuck and the chuck pull rod are axially connected and placed inside the hollow magnet. The chuck and the pull rod are connected and inserted into the hollow magnet. An elastic device is placed between the hollow magnet and the chuck pull rod. The stator is composed of silicon steel sheets and a metal coil and is placed in the motor housing. The rotating clamping device is composed of a rotating sleeve, a clamping seat, and a slider. When the rotating sleeve rotates, it drives the slider to move along the axial direction of the motor. The displacement of the slider drives the chuck to open and release the old grinding head, and close and clamp the new grinding head in the chuck. When the rotor rotates, it drives the chuck, the chuck, the chuck pull rod, and the grinding head to rotate simultaneously.

[0011] A third technical solution of the present invention is to provide a grinding pen motor with a clamping structure, comprising a motor housing, bearings, a rotor, a stator, a motor back cover, a chuck, a chuck pull rod, an elastic device, and a rotating clamping device. The rotor is composed of a motor shaft, silicon steel sheets, and a metal coil. The motor shaft is a hollow structure. The chuck and chuck pull rod are axially connected and placed inside the motor shaft. The chuck and pull rod are connected and inserted into the hollow motor shaft. An elastic device is placed between the hollow motor shaft and the chuck pull rod. The stator is composed of magnets and is placed in the housing. The rotating clamping device comprises a rotating sleeve, a clamping seat, and a slider. The rotating sleeve rotates, driving the slider to move axially along the motor. The displacement of the slider drives the chuck to open, releasing the old grinding head, and close to clamp the new grinding head in the chuck. When the rotor rotates, it drives the chuck, chuck, chuck pull rod, and grinding head to rotate simultaneously.

[0012] Compared with the existing technology, the present invention combines the spindle component for clamping the grinding head of the traditional grinding pen and the motor into one. The outer shell of the motor is the outer shell of the front handle of the grinding pen, the motor shaft is the clamping sleeve, and the rear cover of the motor is the clamping seat and also the connecting part of the front handle and the rear handle of the grinder. The coupling and related accessories used for transmission are also removed in the middle, which greatly simplifies the complex clamping, transmission and power components of the traditional grinding pen, and reduces the assembly difficulty and production cost.

[0013] At the same time, since the complex transmission system is reduced, the motor directly drives the grinding head to rotate, which greatly improves the coaxiality of the grinding head, chuck and motor, greatly reduces the vibration of the grinding head, the vibration and noise of the machine body, improves the process yield, and further reduces production costs.

[0014] The present invention changes the traditional four-stage structure of the grinder, which is originally arranged in series—the first stage is the spindle component for clamping the grinding head, the second stage is the coupling, the third stage is the motor, and the fourth stage is the battery and PCBA board—to a two-stage structure by placing the chuck and chuck pull rod on the hollow motor shaft. Since the spindle and coupling occupy about one-third of the length of a traditional grinding pen, the present invention can save at least one-third of the space of a traditional grinding pen. The saved space can be used to accommodate a larger battery, greatly increasing the battery life of the wireless grinding pen, and can also be used to accommodate more electronic components and realize more functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] FIG1 is a schematic diagram of the three-dimensional structure of the present invention.

[0016] FIG2 is a schematic cross-sectional view of FIG1 .

[0017] FIG3 is a schematic cross-sectional view of the housing of FIG2 .

[0018] FIG4 is a schematic diagram of the three-dimensional structure of a wireless polishing pen.

[0019] FIG5 is a schematic cross-sectional view of FIG4 .

[0020] FIG6 is a schematic cross-sectional view of the housing of FIG4 .

[0021] Among them: 1. Grinding head; 21. Chuck; 2101. First external thread; 22. Chuck pull rod; 221. First internal thread; 3. Motor housing; 4. Hollow motor shaft; 5. Magnet; 6. Metal coil; 71. Silicon steel sheet; 72. Silicon steel sheet fixing pin; 81. First bearing; 82. Second bearing; 9. First elastic device; 10. Rotating sleeve; 101. First silicone ring; 102. Second silicone ring; 11. Motor back cover / opening clamp seat; 111. Second external thread; 12. Slider; 131. Motor power line; 132. Motor power line guide block; 14. Second elastic device; 151. Slider accessories; 16. Gap; 17. Battery 18. Rear handle housing; 181. Second internal thread; 19. Type-C interface protective plug; 20. Type-C interface; 211. First bracket; 212. Second bracket; 220. PCBA board; 23. Screen; 241. First status indicator light; 242. Second status indicator light; 25. Button; 26. Encoder; 27. Knob; 28. Knob decoration; 100. Stator; 200. Rotor; 300. Clamp assembly; 400. Rotating clamping device; 500. Front handle; 600. Rear handle. DETAILED DESCRIPTION

[0022] In the description of the present invention, it should be understood that the directions or positional relationships indicated by terms such as "center," "upper," "lower," "front," "back," "left," and "right" are based on the directions or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific contexts.

[0024] Please refer to Figures 1 to 3. Figure 1 discloses a grinding pen motor with a clamping structure, Figure 2 is a cross-sectional schematic diagram of Figure 1, and Figure 3 is a cross-sectional schematic diagram of the motor housing 3, silicon steel sheet 71, metal coil 6, magnet 5, hollow motor shaft 4, motor back cover 11, and rotating sleeve 10.

[0025] As shown in Figures 2 and 3, a preferred embodiment of the grinding pen motor of the present invention includes a motor housing 3, a silicon steel sheet 71, a metal coil 6, a gap 16, a magnet 5, a hollow motor shaft 4, a chuck 21, a chuck pull rod 22, a slider 12, a motor back cover 11, a rotating sleeve 10, a first bearing 81, and a second bearing 82, wherein the first bearing 81, the second bearing 82, the chuck 21, the chuck pull rod 22, and the hollow motor shaft 4 are coaxially arranged, the hollow motor shaft 4 is passed through the first bearing 81 and the second bearing 82, the chuck 21 and the chuck pull rod 22 are passed through the hollow motor shaft 4, the grinding head 1 is passed through the chuck 21, the first bearing 81 is installed in the motor housing 3, and the second bearing 82 is installed in the motor back cover 11. The silicon steel sheet 71 is passed through and fixed by a silicon steel sheet fixing pin 72.

[0026] As shown in Figure 2, the chuck 21 is connected to the chuck rod 22 by a first external thread 2101 and a first internal thread 221. A first elastic device 9 is installed between the chuck rod 22 and the hollow motor shaft 4. The first elastic device 9 drives the chuck rod 22 upward, and the chuck rod 22 drives the chuck 21 upward. The chuck 21 is squeezed inward by the front end cavity of the hollow motor shaft. The chuck 21 is tightened upward to clamp the grinding head 1. The hollow motor shaft 4 is tightly connected to the magnet 5. The magnet 5 is driven to rotate by the magnetic field change of the metal coil 6. The rotation of the magnet 5 drives the hollow motor shaft 4, the chuck 21, the chuck rod 22 and the grinding head 1 to rotate.

[0027] As shown in Figures 2 and 3, the rotating sleeve 10 is connected to the motor back cover 11 through the first silicone ring 101 and the second silicone ring 102. When the rotating sleeve 10 rotates, it drives the slider attachment 151 and the slider 12 to move up and down. The slider 12 moves up and down to drive the chuck rod 22 to move up and down. The chuck rod 22 moves up and down to drive the chuck 21 to open and release the old grinding head 1, and close to clamp the new grinding head 1.

[0028] As shown in FIG2 and FIG3, the motor power supply line 131 is connected to the metal coil 6. The motor power supply line passes through the motor rear cover 11, passes through the cavity surrounded by the motor power supply line guide block 132, and continues to pass upward along the inner wall of the motor rear cover.

[0029] Please refer to Figures 4 to 6. Figure 4 discloses a wireless polishing pen that adopts the polishing pen motor with a clamping structure. Figure 5 is a cross-sectional schematic diagram of Figure 4. Figure 6 is a cross-sectional schematic diagram of the motor housing 3, silicon steel sheet 71, metal coil 6, magnet 5, hollow motor shaft 4, motor back cover 11, rotating sleeve 10 and rear handle housing 18.

[0030] As shown in Figures 5 and 6, the wireless polishing pen is mainly composed of two sections. The first section is the polishing pen motor as the front handle, and the second section is mainly composed of a battery 17 and a PCBA board 220 placed side by side. The battery 17 and the PCBA board 220 are placed in a first bracket 211 and a second bracket 212. The first bracket 211 and the second bracket 212 are placed in a rear handle shell 18. A knob 27 and a knob decoration 28 are provided above the rear handle shell 18. The knob 27 drives the encoder 26 below the knob 27 to control the speed of the motor.

[0031] As shown in Figures 5 and 6, a button 25, a screen 23, a first status indicator light 241, and a second status indicator light 242 are provided on the right side of the rear handle shell 18, and a Type-C interface 20 is provided on the left side of the rear handle shell 18. A Type-C interface protective plug 19 is provided outside the Type-C interface 20.

[0032] In one embodiment, as shown in Figures 2 and 3, the polishing pen motor with a clamping structure includes a motor housing 3, a stator 100, a rotor 200, a chuck assembly 300, and a rotating clamping device 400. The polishing pen motor with a clamping structure is formed with the motor housing 3 as the overall outer contour, and the remaining components are wrapped and accommodated within the motor housing 3. Optionally, the motor housing 3 is a cylindrical pen-shaped structure. Furthermore, the stator 100 is fixed to the inner wall of the motor housing 3, and the rotor 200 is sleeved within the stator 100. A gap 16 is left between the stator 100 and the rotor 200. When the polishing pen motor is in operation, the rotor 200 can rotate relative to the stator 100. In this embodiment, the stator 100 includes a metal coil 6 and a silicon steel sheet 71, wherein a plurality of the silicon steel sheets 71 are fixed by silicon steel sheet fixing pins 72 to form a hollow cylindrical structure and the metal coil 6 is laid around the inner wall of the cylindrical structure, and then the cylindrical structure is fixed on the inner wall of the motor housing 3, and the rotor 200 is arranged in the cylindrical structure, so that when the grinding pen motor is powered on and starts working, the rotor 200 rotates relative to the cylindrical structure; the rotor 200 includes a magnet 5 and a hollow motor shaft 4, and the chuck assembly 300 is accommodated and fixed by the hollow motor shaft 4 to drive the chuck assembly 300 to rotate synchronously.

[0033] Optionally, according to the changes in the motor structure, it can also be set that the stator 100 includes a metal coil 6 and a silicon steel sheet 71, and the rotor 200 is a hollow magnet 5, and the magnet 5 is used to accommodate and fix the chuck assembly 300 to drive the chuck assembly 300 to rotate synchronously; it can also be set that the stator 100 is a magnet 5, and the rotor 200 includes a metal coil 6, a silicon steel sheet 71 and a hollow motor shaft 4, and the hollow motor shaft 4 is used to accommodate and fix the chuck assembly 300 to drive the chuck assembly 300 to rotate synchronously.

[0034] Furthermore, a first bearing 81 is provided between the rotor 200 and the motor housing 3, and a second bearing 82 is provided between the rotor 200 and the rotating clamping device 400. The first bearing 81 and the second bearing 82 ensure the normal rotation of the rotor 200 relative to the stator 100 when the grinding pen motor is working, and eliminate vibration during the rotation process.

[0035] Furthermore, the chuck assembly 300 includes a chuck rod 22, a chuck 21, and a first elastic member 9. One end of the chuck rod 22 is provided with a first internal thread 221, and one end of the chuck 21 is provided with a first external thread 2101. The chuck 21 and the chuck rod 22 are fixedly connected by the first external thread 2101 and the first internal thread 221 and are sleeved within the rotor 200. In this embodiment, the portion of the chuck rod 22 connected to the chuck 21 is sleeved within the hollow motor shaft 4 to ensure that the chuck assembly 300 rotates synchronously with the hollow motor shaft 4.

[0036] Furthermore, the other end of the chuck 21 is arranged at the opening of the motor housing 3 and can extend from the opening of the motor housing 3 to extend relative to the polishing pen motor, and the other end of the chuck pull rod 22 is extended and arranged in the motor housing 3 and abuts against the rotating clamping device 400. When the rotating clamping device 400 is rotated, the rotating clamping device 400 pushes the chuck pull rod 22 to move toward the chuck 21 along the axial direction of the rotor 200 to push the chuck 21 to extend from the polishing pen motor. Specifically, the other end of the chuck 21 is an elastic blooming structure. When the chuck 21 is extended from the polishing pen motor, the other end of the chuck 21 opens, and the polishing head 1 can be placed in the chuck 21. When the chuck 21 is retracted into the polishing pen motor, the hollow inner cavity of the hollow motor shaft 4 squeezes the other end of the chuck 21, so that the other end of the chuck 21 clamps the polishing head 1 to complete the replacement of the polishing head 1 and ensure that after clamping the polishing head 1, the polishing head 1 can rotate synchronously with the chuck 21.

[0037] Furthermore, the first elastic device 9 is arranged between the chuck pull rod 22 and the rotor 200, providing a force to the chuck pull rod 22 to continuously move away from the rotor 200, so as to push the chuck pull rod 22 to move the axial direction of the rotor 200 away from the chuck 21 when the rotating clamping device 400 stops rotating, so as to drive the chuck 21 to retract from the opening of the motor housing 3 and clamp the grinding head 1, thereby realizing the retraction of the chuck group 300 relative to the grinding pen motor to clamp the grinding head 1.

[0038] Furthermore, the rotating clamping device 400 includes a slider 12, a slider attachment 151, a clamping seat 11 and a rotating sleeve 10. Specifically, the rotating sleeve 10 and the clamping seat 11 are coaxially arranged with the rotor 200, and the rotating sleeve 10 is sleeved on the outside of the clamping seat 11. One end of the clamping seat 11 is fixedly connected to the motor housing 3, and the other end extends to form the motor back cover. The clamping seat 11 forms a second external thread 111 on the surface of the motor back cover to be screwed with other parts of the polishing pen. Furthermore, the slider 12 is sleeved inside the clamping seat 11 and abuts against the chuck pull rod 22 in the chuck assembly 300. The slider 12 can move along the axial direction of the clamping seat 11 to push the chuck pull rod 22 to move, thereby driving the chuck assembly 300 to extend and retract relative to the polishing pen motor. One end of the slider attachment 151 abuts against the side wall of the slider 12, and the other end passes through the clamping seat 11 and abuts against the inner wall of the rotating sleeve 10. Furthermore, a movable slot is provided on the side wall of the slider 12 for the slider attachment 151 to move, and the clamping seat 11 is provided with a through slot inclined toward the chuck assembly 300. When the rotating sleeve 10 is rotated, the slider attachment 151 moves along the through slot and drives the slider 12 toward the chuck assembly 300, thereby converting the rotational motion of the rotating sleeve 10 into linear motion of the slider 12, pushing the chuck pull rod 22 and the chuck 21 to move along the axial direction of the rotor 200 toward the opening of the motor housing 3, thereby causing the chuck assembly 300 to extend relative to the polishing pen motor. Optionally, the slider attachment 151 is a ball, and when the rotating sleeve 10 is rotated, the slider attachment 151 rotates synchronously to roll along the movable groove and the through groove; optionally, the slider attachment 151 is a sliding rod, and when the rotating sleeve 10 is rotated, the slider attachment 151 rotates synchronously to slide along the movable groove and the through groove.

[0039] Optionally, two circles of silicone rings are provided between the rotating sleeve 10 and the clamping seat 11, wherein the first silicone ring 101 is arranged above the slider attachment 151, and the second silicone ring 102 is arranged below the slider attachment 151, and the first silicone ring 101 and the second silicone ring 102 are arranged parallel to and around the clamping seat 11 to ensure that when the rotating sleeve 10 rotates, there is only relative rotation between it and the clamping seat 11, and no relative movement along the axial direction occurs, thereby improving the stability of the rotation of the rotating sleeve 10.

[0040] Furthermore, the polishing pen motor with a clamping structure is further provided with a motor power supply line 131 and a motor power supply line guide block 132, wherein the motor power supply line guide block 132 is fixed in the clamping seat 11 of the rotating clamping device 400 and is arranged near the rotor 200. One end of the motor power supply line 131 is fixed in the motor housing 3 and electrically connected to the metal coil 6 in the polishing pen motor, and the other end passes through the motor power supply line guide block 132 and extends out from the motor back cover 11 formed by the rotating clamping device 400 to electrically connect to the power supply device of the polishing pen and power the polishing pen motor.

[0041] In one embodiment, the present application further provides a polishing pen, as shown in Figures 4 and 5, comprising a front handle 500 and a rear handle 600, wherein the front handle 500 is the aforementioned polishing pen motor with a clamping structure, and is screwed to the rear handle 600 to form an integral polishing pen. Furthermore, the rear handle 600 includes a rear handle housing 18, and a PCBA board 220 and a battery 17 fixed within the rear handle housing 18. The battery 17 and the PCBA board 220 are connected to the polishing pen motor via the motor power supply line 131, and the PCBA board 220 and the battery 17 are used to power and control the polishing pen motor with a clamping structure.

[0042] Specifically, as shown in Figures 5 and 6, the rear handle housing 18 secures the battery 17 via a first bracket 211 and secures the PCBA board 220 via a second bracket 212. A second internal thread 181 is provided on the end of the rear handle housing 18 facing the front handle 500. The rear handle 600 is threadedly connected to the second external thread 111 on the motor rear cover 11 of the front handle 500 via the second internal thread 181. Furthermore, a second elastic member 14 is provided between the rear handle 600 and the front handle 500. The second elastic member 14 is sleeved within the motor rear cover formed by the clamping seat 11. One end of the second elastic member 14 abuts the slider 12 within the rotating clamping device 400, and the other end abuts the rear handle 600, thereby continuously applying a force to the slider 12 toward the opening of the motor housing 3, thereby allowing the rotating sleeve 10 to more easily drive the slider 12 toward the chuck assembly 300. Furthermore, a sunken initial slot is provided at the initial position of the through slot of the slider attachment 151 corresponding to the clamping seat 11. After the chuck assembly 300 clamps the grinding head 1, the rotation of the rotating sleeve 10 stops, and the first elastic device 9 pushes the chuck pull rod 22 back to its position. At this time, the slider 12 and the slider attachment 151 return to their initial positions. Since the slider 12 is subjected to the force applied by the second elastic device 14, the slider 12 also applies a force toward the opening direction of the motor housing 3 to the slider attachment 151 through the moving slot of the side wall, thereby ensuring that the slider attachment 151 is locked in the initial slot, avoiding the movement of the slider attachment 151 when the rotating sleeve 10 is not rotated, and improving the stability of the product.

[0043] Furthermore, a knob 27 and a corresponding knob decoration 28 are provided at one end of the rear handle shell 18 away from the front handle 500, and an encoder 26 is provided at a position corresponding to the knob 27 in the rear handle shell 18, wherein the encoder 26 is communicated with the polishing pen motor with a clamping structure through the PCBA board 220, and the state of the encoder 26 is adjusted by rotating the knob 27 to control the speed of the polishing pen motor.

[0044] Furthermore, a button 25, a screen 23, a first status indicator light 241, and a second status indicator light 242 are provided on the side of the rear handle housing 18 corresponding to the PCBA board 220 to control and display the current working status of the polishing pen; a Type-C port 20 is provided on the side of the rear handle housing 18 corresponding to the battery 17, and the battery 17 is charged through the Type-C port 20. Optionally, a Type-C port protective plug 19 is provided in the Type-C port 20.

[0045] In summary, the present application discloses a grinding pen motor and a grinding pen with a clamping structure. By providing a rotor with a hollow structure to accommodate a chuck assembly, the chuck assembly is accommodated in the motor structure, so that the grinding pen using the grinding pen motor has a more compact space, can accommodate a larger capacity battery and more abundant electronic components, thereby achieving longer battery life and more diverse functions.

Claims

1. A grinding pen motor with a clamping structure, comprising a motor housing, bearings, a rotor, a stator, a motor rear cover, a chuck, a chuck pull rod, an elastic device, and a rotating clamping device; The rotor consists of a motor shaft and a magnet. The motor shaft is a hollow structure. The chuck and the chuck pull rod are axially connected and placed inside the hollow motor shaft. The chuck and the pull rod are connected and passed through the hollow motor shaft. An elastic device is provided between the hollow motor shaft and the chuck pull rod. The stator consists of silicon steel sheets and metal coils and is placed in the motor housing. The rotating clamping device consists of a rotating sleeve, a clamping seat, and a slider; when the rotating sleeve rotates, the slider is driven to move up and down along the motor axis, and the displacement of the slider drives the chuck to open and release the old grinding head, and close to clamp the new grinding head in the chuck; when the rotor rotates, the chuck, chuck pull rod and grinding head are driven to rotate simultaneously.

2. The grinding pen motor with a clamping structure according to claim 1, characterized in that: The rear cover of the motor also serves as a clamping seat.

3. The grinding pen motor with a clamping structure according to claim 2, characterized in that: The rear end of the rear cover of the motor is provided with a thread and is connected to the rear handle of the grinder handle.

4. The grinding pen motor with a clamping structure according to any one of claims 1 to 3, characterized in that: A polishing pen handle comprising the polishing pen motor, wherein the polishing pen handle comprises the polishing pen motor and a polishing pen handle shell.

5. The grinding pen motor with a clamping structure according to any one of claims 1 to 3, characterized in that: A wireless polishing pen comprising the polishing pen motor, wherein the wireless polishing pen comprises the polishing pen motor, a battery, a control circuit, and a polishing pen housing.

6. A grinding pen motor with a clamping structure, characterized in that: It includes a motor housing, bearings, a rotor, a stator, a motor back cover, a chuck, a chuck pull rod, an elastic device, and a rotating opening device; The rotor is composed of a hollow magnet. The chuck and the chuck pull rod are axially connected and placed inside the hollow magnet. The chuck and the pull rod are connected and pass through the hollow magnet. An elastic device is provided between the hollow magnet and the chuck pull rod. The stator is composed of silicon steel sheets and metal coils and is placed in the motor housing; The rotating clamping device consists of a rotating sleeve, a clamping seat, and a slider; when the rotating sleeve rotates, the slider is driven to move up and down along the axis of the motor. The up and down displacement of the slider drives the chuck to open and release the old grinding head, and close to clamp the new grinding head in the chuck; when the rotor rotates, the chuck, chuck pull rod and grinding head are driven to rotate simultaneously.

7. The grinding pen motor with a clamping structure according to claim 6, characterized in that: The rear cover of the motor also serves as a clamping seat.

8. The grinding pen motor with a clamping structure according to claim 7, characterized in that: The rear end of the rear cover of the motor is provided with a thread and is connected to the rear handle of the grinder handle.

9. The grinding pen motor with a clamping structure according to any one of claims 6 to 8, characterized in that: A polishing pen handle comprising the polishing pen motor, wherein the polishing pen handle comprises the polishing pen motor and a polishing pen handle shell.

10. The grinding pen motor with a clamping structure according to any one of claims 6 to 8, characterized in that: A wireless polishing pen comprising the polishing pen motor, wherein the wireless polishing pen comprises the polishing pen motor, a battery, a control circuit, and a polishing pen housing.

11. A grinding pen motor with a clamping structure, comprising a motor housing, bearings, a rotor, a stator, a motor rear cover, a chuck, a chuck pull rod, an elastic device, and a rotating clamping device; The rotor is composed of a motor shaft, silicon steel sheets, and a metal coil. The motor shaft is a hollow structure. The chuck and the chuck pull rod are axially connected and placed inside the hollow motor shaft. The chuck and the pull rod are connected and passed through the hollow motor shaft. An elastic device is provided between the hollow motor shaft and the chuck pull rod. The stator is composed of magnets and is placed inside the motor housing. The rotating clamping device consists of a rotating sleeve, a clamping seat, and a slider; when the rotating sleeve rotates, the slider is driven to move along the axial direction of the motor. The displacement of the slider drives the chuck to open and release the old grinding head, and close to clamp the new grinding head in the chuck; when the rotor rotates, the chuck, chuck pull rod and grinding head are driven to rotate simultaneously.

12. The grinding pen motor with a clamping structure according to claim 11, characterized in that: The rear cover of the motor also serves as a clamping seat.

13. The grinding pen motor with a clamping structure according to claim 11, characterized in that: The rear end of the rear cover of the motor is provided with a thread and is connected to the rear handle of the grinder handle.

14. The grinding pen motor with a clamping structure according to any one of claims 11 to 13, characterized in that: A polishing pen handle comprising the polishing pen motor, wherein the polishing pen handle comprises the polishing pen motor and a polishing pen handle shell.

15. The grinding pen motor with a clamping structure according to any one of claims 11 to 13, characterized in that: A wireless polishing pen comprising the polishing pen motor, wherein the wireless polishing pen comprises the polishing pen motor, a battery, a control circuit, and a polishing pen housing.

16. A grinding pen motor with a clamping structure, characterized in that: include: Motor housing; A stator, the stator being fixed inside the motor housing; A rotor, wherein the rotor is sleeved in the stator and is hollow in the axial direction. When the polishing pen motor is working, the rotor rotates relative to the stator; A chuck assembly, wherein the chuck assembly is sleeved in the rotor and rotates synchronously with the rotor, and one end of the chuck assembly is disposed in the motor housing, and the other end of the chuck assembly extends from the polishing pen motor to clamp the polishing head; A rotating clamping device, one end of which is connected to the motor housing and abuts against one end of the chuck assembly arranged in the motor housing, and the other end of the rotating clamping device forms a motor back cover. Rotating the rotating clamping device drives the chuck assembly to move along the axial direction of the rotor, so that the chuck assembly is extended relative to the grinding pen motor.

17. The grinding pen motor with a clamping structure according to claim 16, characterized in that: The stator is composed of fixed silicon steel sheets and metal coils, and the rotor is composed of magnets and a motor shaft sleeved in the stator, and the motor shaft is hollow along the axial direction to accommodate the chuck assembly; or the stator is composed of fixed silicon steel sheets and metal coils, and the rotor is composed of magnets sleeved in the stator, and the magnets are hollow along the axial direction to accommodate the chuck assembly; or the stator is composed of fixed magnets, and the rotor is composed of silicon steel sheets, metal coils and a motor shaft sleeved in the stator, and the motor shaft is hollow along the axial direction to accommodate the chuck assembly.

18. The grinding pen motor with a clamping structure according to claim 16, characterized in that: The chuck assembly comprises: a chuck pull rod, one end of which is sleeved in the rotor, and the other end of which is disposed in the motor housing and abuts against the rotating clamping device; A chuck, one end of which is sleeved in the rotor and connected to the one end of the chuck pull rod, and the other end of which extends from the grinding pen motor to clamp the grinding head; A first elastic device is provided between the chuck pull rod and the rotor to drive the chuck pull rod and the chuck to move axially along the rotor when the rotating clamping device stops rotating, thereby realizing the retraction of the chuck assembly relative to the grinding pen motor.

19. The grinding pen motor with a clamping structure according to claim 18, characterized in that: The one end of the chuck is provided with a first external thread, the one end of the chuck pull rod is provided with a first internal thread, and the chuck and the chuck pull rod are threadedly connected through the first external thread and the first internal thread.

20. The grinding pen motor with a clamping structure according to claim 18, characterized in that: A first bearing is provided between the rotor and the motor housing, and a second bearing is provided between the rotor and the rotating clamping device to ensure that the rotor rotates relative to the stator.

21. The grinding pen motor with a clamping structure according to claim 18, characterized in that: The rotating clamping device comprises: a slider, the slider abutting against one end of the clamp assembly disposed in the motor housing; The clamping seat is sleeved outside the slider, and one end of the clamping seat is connected to the motor housing. The other end of the open clamp seat extends to form the motor back cover to connect with other structures of the grinding pen; a slider attachment, one end of which abuts against a side wall of the slider, and the other end of which passes through the clamping seat; A rotating sleeve is provided outside the clamping seat at a position corresponding to the slider, and the inner wall of the rotating sleeve abuts against the other end of the slider attachment. When the rotating sleeve is rotated, the slider attachment converts the rotational motion of the rotating sleeve into linear motion of the slider, so as to drive the chuck assembly to move axially along the rotor, thereby realizing the extension of the chuck assembly relative to the grinding pen motor.

22. The grinding pen motor with a clamping structure according to claim 21, characterized in that: A first silicone ring and a second silicone ring are provided in parallel between the rotating sleeve and the clamping seat to ensure stable rotation of the rotating sleeve relative to the clamping seat.

23. The polishing pen motor with a clamping structure according to claim 21, characterized in that: One end of the clamping seat is screwed to the motor housing, and the motor rear cover formed by extending from the other end of the clamping seat is provided with a second external thread for screwing to other structures of the grinding pen.

24. The grinding pen motor with a clamping structure according to claim 16, characterized in that: Also includes: A motor power supply line guide block, the motor power supply line guide block being fixed in the rotating clamping device; A motor power supply line, one end of which is fixed in the motor housing and electrically connected to the polishing pen motor, and the other end of which passes through the motor power supply line guide block and extends from the motor back cover formed by the rotating clamping device.

25. A polishing pen, characterized in that: include: A front handle, wherein the front handle is a polishing pen motor with a clamping structure according to any one of claims 16 to 24; The rear handle is screwed to the front handle and includes a rear handle shell and a battery and a PCBA board fixed in the rear handle shell, which supply power to and control the polishing pen motor with a clamping structure.

Images