Polishing pen motor with clamping structure

Abstract

The utility model provides a polishing pen motor with a clamping structure. The polishing pen motor comprises a shell, a bearing, a rotor, a stator, a chuck, a chuck pull rod, an elastic device and a rotary unclamping device. The rotor is composed of a motor rotating shaft and a magnet, the motor rotating shaft is of a hollow structure, the chuck and the chuck pull rod are axially connected and then arranged in the hollow motor rotating shaft in a penetrating mode, and an elastic device is arranged between the hollow motor rotating shaft and the chuck pull rod. The stator is composed of a silicon steel sheet and a metal coil and placed in the motor shell. The rotating clamp opening device is composed of a rotating sleeve, a clamp opening base and a sliding block. A main shaft part for clamping a grinding head of a traditional grinding pen and a motor are combined into a whole, the problems of grinding head bouncing, machine body vibration and noise caused by the fact that a transmission part of the traditional grinding pen is complex and the combination tolerance of parts is difficult to control are effectively solved, space is saved, and a larger battery can be placed. And the endurance time of the wireless polishing pen is greatly prolonged.

Description

Technical Field

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

[0002] At present, handheld grinding pens are widely used in the fields of manicure, handicraft engraving, metal processing, dentistry, DIY handicraft, etc., with the characteristics of high grinding efficiency and simple operation. However, the existing handheld grinding pens have complex structures and many parts. They are mainly composed of spindles, motors, batteries, PCBA and other components for clamping grinding heads. The actual processing and combination tolerances of the parts are often very difficult to control, and the coaxiality cannot be guaranteed. At the same time, the grinding pens usually rotate at a speed of more than 25,000 revolutions per minute. Therefore, the existing grinding pens have serious problems such as grinding head jumping, body vibration noise and easy wear of parts. In addition, the battery-powered wireless handheld grinding pens are limited by the limited internal space of the grinding pens, and their actual battery life under high-intensity grinding operations does not exceed 20 minutes. Utility Model Content

[0003] In order to overcome the above problems, the utility model provides a grinding pen motor with a clamping structure which has the advantages of simple structure, easy assembly, high coaxiality, low body vibration, low noise and long service life.

[0004] The technical solution of the utility model is: to provide a grinding pen motor with a clamping structure, including a housing, a bearing, a rotor, a stator, a tail cover, a chuck, a chuck pull rod, an elastic device, and a rotating clamping device. The rotor is composed of a motor shaft and a magnet, and the motor shaft is a hollow structure. The chuck and the chuck pull rod are axially connected and placed inside the motor shaft. The chuck is connected to the pull rod and is 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 silicon steel sheets and metal coils and is placed beside the inner wall of the housing. The rotating clamping device is composed of a rotating sleeve, a clamping seat, and a slider. The rotating sleeve rotates to drive 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 closes and clamps 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.

[0005] As an improvement to the utility model, the rear cover of the motor is also a clamping seat.

[0006] As an improvement to the utility model, a thread is arranged at the rear end of the rear cover of the motor and is connected to the rear handle of the grinder handle.

[0007] A further technical solution of the utility model is to assemble the polishing pen motor and the polishing pen handle shell into a polishing machine handle, and the polishing machine handle is connected to the polishing pen host through a power line.

[0008] A further technical solution of the utility model is to assemble the polishing pen motor, battery, control circuit and polishing pen handle shell into a wireless polishing pen.

[0009] The second technical solution of the utility model is: to provide a grinding pen motor with a clamping structure, including a motor housing, a bearing, 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, and the chuck and the chuck pull rod are axially connected and placed inside the hollow magnet. The chuck is connected to the pull rod and penetrated into the hollow magnet, and an elastic device is placed 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 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 closes and clamps 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.

[0010] The third technical solution of the utility model is: to provide a grinding pen motor with a clamping structure, including a motor housing, a bearing, 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, a silicon steel sheet 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 motor shaft. The chuck is connected to the pull rod and is 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 a magnet and is placed in the housing. The rotating clamping device is composed of a rotating sleeve, a clamping seat, and a slider. The rotating sleeve rotates to drive 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 closes and clamps 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] Compared with the prior art, the utility model 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 complicated clamping, transmission and power components of the traditional grinding pen and reduces the assembly difficulty and production cost.

[0012] 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, body vibration and noise problems, improves the process yield, and further reduces production costs.

[0013] The utility model changes the original four-stage structure of the traditional grinder, i.e., 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, into a two-stage structure by placing the chuck and the chuck pull rod on the hollow motor shaft. Since the spindle and the coupling occupy about one-third of the length of the traditional grinding pen, the utility model can save at least one-third of the space of the traditional grinding pen. The saved space can be used to place larger batteries, greatly increasing the battery life of the wireless grinding pen, and can also be used to place more electronic components to achieve more functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0015] Figure 2 yes Figure 1 Schematic cross-sectional view of .

[0016] Figure 3 yes Figure 2 Schematic diagram of the shell cutaway view.

[0017] Figure 4 It is a three-dimensional structural schematic diagram of a wireless grinding pen.

[0018] Figure 5 yes Figure 4 Schematic cross-sectional view of .

[0019] Figure 6 yes Figure 4 Schematic diagram of the shell cutaway view.

[0020] Among them: 1. grinding head; 21. chuck; 211. first external thread; 22. chuck pull rod; 221. first internal thread; 3. motor housing; 4. hollow motor shaft; 5. strong 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; 111. third external thread; 12. slider; 131. motor power supply line ; 132. Motor power supply line guide block; 14. Second elastic device; 15. Slider attachment; 16. Gap; 17. Battery; 18. Rear handle shell; 181. Second internal thread; 19. Type-C interface protection plug; 20. Type-C interface; 211. First bracket; 212. Second bracket; 22. PCBA board; 23. Screen; 241. First status indicator light; 242. Second status indicator light; 25. Button; 26. Encoder; 27. Knob; 28. Knob decoration. DETAILED DESCRIPTION

[0021] In the description of the present invention, it should be understood that the directions or positional relationships indicated by the predicates such as "center", "upper", "lower", "front", "back", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] See also Figures 1 to 3 , Figure 1 Disclosed is a grinding pen motor with a clamping structure. Figure 2 yes Figure 1 A cross-sectional diagram of Figure 3 It 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 rear cover 11 , and rotating sleeve 10 .

[0024] like Figure 2 and Figure 3 As shown, the preferred embodiment of the grinding pen motor of the utility model 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 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 rod 22, and the hollow motor shaft 4 are coaxially arranged, the hollow motor shaft 4 is penetrated in the first bearing 81 and the second bearing 82, the chuck 21 and the chuck rod 22 are penetrated in the hollow motor shaft 4, the grinding head 1 is penetrated in 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 the silicon steel sheet fixing pin 72.

[0025] like Figure 2As shown, the chuck 21 is connected to the chuck rod 22 by a first external thread 211 and a first internal thread 221, and a first elastic device 9 is installed between the chuck rod 22 and the hollow motor shaft 4, and the first elastic device 9 drives the chuck rod 22 upward, and the chuck rod 22 drives the chuck 21 upward, and the chuck 21 is squeezed inward by the front end cavity of the hollow motor shaft, and the chuck 21 can clamp the grinding head 1 by tightening, and the hollow motor shaft 4 is tightly connected to the magnet 5, and the magnet 5 is driven to rotate by the change of the magnetic field of the metal coil 6, and 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.

[0026] like Figure 2 and Figure 3 As shown, 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 pull rod 22 to move up and down. The chuck pull rod 22 moves up and down to drive the chuck 21 to open and release the old grinding head 1, and close and clamp the new grinding head 1.

[0027] like Figure 2 and Figure 3 As shown, 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.

[0028] See also Figures 4 to 6 , Figure 4 Disclosed is a wireless polishing pen using the polishing pen motor with a clamping structure. Figure 5 yes Figure 4 A cross-sectional diagram of Figure 6 It 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 rear cover 11, rotating sleeve 10 and rear handle housing 18.

[0029] like Figure 5 and Figure 6 As shown, 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 22 placed side by side. The battery 17 and the PCBA board 22 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.

[0030] like Figure 5 and Figure 6 As shown, 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, and a Type-C interface protective plug is provided outside the Type-C interface 20.

Claims

1. A grinding pen motor with a clamping structure, characterized in that: It includes a motor housing, a bearing, a rotor, a stator, a motor back cover, a clamp, a clamp pull rod, an elastic device, and a rotating clamping device; The rotor is composed 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 inserted into the hollow motor shaft. An elastic device is arranged between the hollow motor shaft 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, 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, the chuck pull rod and the 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 is also 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, a bearing, a rotor, a stator, a motor back cover, a clamp, a clamp 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 penetrate the hollow magnet, and an elastic device is placed 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, and 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, it drives the chuck, chuck, chuck pull rod and grinding head 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 is also 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, characterized in that: It includes a motor housing, a bearing, a rotor, a stator, a motor back cover, a clamp, a clamp pull rod, an elastic device, and a rotating clamping device; The rotor is composed of a motor shaft, a silicon steel sheet 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 arranged between the hollow motor shaft and the chuck pull rod. The stator is composed of a magnet and 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, 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, it drives the chuck, chuck, chuck pull rod and grinding head 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 is also 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.

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