A portable lithium-ion battery grinder

Abstract

This utility model belongs to the field of polishing machine technology, and in particular to a portable lithium-ion polishing machine. It includes a polishing machine body, blades, a protective cover, and a power button. The blades are located on the side of the polishing machine body, the protective cover is located around the blades, and the power button is located on the outer end face of the polishing machine body. This utility model incorporates a split-type power supply unit, a slide rail, a displacement protective shell, a belt, a buckle, and adjusting teeth. When using this polishing machine, the operator first puts the belt around their waist, inserts the adjusting teeth through the buckle, and moves the adjusting teeth according to their waist circumference until the belt is stably fixed at the waist. The power button controls the power supply to the split-type power supply unit, and the control panel controls the blade speed and start / stop. When using the control panel, the displacement protective shell can be slid to reveal the control panel. When the polishing machine body needs to be moved, the operator can pull out the split-type power supply unit by plugging and unplugging, leaving only the polishing machine body to be carried by hand.

Description

Technical Field

[0001] This utility model relates to the field of polishing machine technology, specifically a portable lithium battery polishing machine. Background Technology

[0002] As an important branch of modern power tools, lithium-ion battery grinders emerged in response to the urgent need for efficient and environmentally friendly work methods in industrial manufacturing and home DIY sectors. With traditional corded tools limited by power access, the maturity of lithium-ion battery technology has enabled grinding operations to break through spatial constraints, finding widespread application in construction decoration, metal processing, and automotive repair. Compared to traditional equipment, its spark-free design and low noise significantly improve work safety, making it particularly suitable for flammable environments or confined spaces. Driven by the goal of carbon neutrality, zero-carbon emission lithium-ion solutions are gradually replacing fuel-powered equipment, becoming the new standard in professional fields such as rail transit maintenance and ship rust removal. For individual users, its ready-to-use nature greatly lowers the operational threshold, and its intelligent speed control function can handle both the delicate tasks of tile cutting and the high-intensity demands of steel structure grinding. Currently, this technology has penetrated from professional scenarios into the home market, achieving multi-functionality through modular accessories, reducing tool purchase costs and promoting the intensive use of resources. With continuous breakthroughs in fast charging technology and battery energy density, lithium-ion battery grinders are redefining the performance boundaries of portable power tools.

[0003] The existing technology has the following shortcomings: In the existing technology, the "Handheld Lithium-ion Brushless Angle Grinder" with the publication number CN116713868A, "a transmission device is installed inside the transmission cavity and a first rotating shaft is fixedly connected to the bottom of the transmission device. A second rotating shaft is fixedly connected to the bottom of the first rotating shaft. The transmission device consists of a first rotating disk, a second rotating disk, and an L-shaped rod. The transmission cavity is L-shaped and has cylindrical grooves at both ends. The first rotating disk is movably fitted in the vertical cylindrical groove, and the second rotating disk is movably fitted in the horizontal cylindrical groove. An electromagnet is fixedly installed in the middle of the bottom end of the first rotating shaft and the bottom end of the electromagnet extends into the top end of the second rotating shaft. A slider is movably fitted inside the sliding groove."

[0004] The aforementioned structure improves the stability of the internal transmission mechanism of the angle grinder and enhances safety during use by incorporating a transmission device consisting of a turntable and an L-shaped rod inside the aluminum head, along with electromagnetic structures within the first and second rotating shafts. However, this structure still employs a traditional integrated power supply and cutting mechanism. While this design offers immediate usability, the heavy lithium battery power unit can cause hand fatigue during handling, leading to decreased operational precision. Furthermore, the integrated assembly means that the entire weight is concentrated in the hand during transport, making it inconvenient to carry, and significant movement could result in accidental contact with the power button, posing a safety hazard. Utility Model Content

[0005] In view of the shortcomings of the existing technology, this utility model provides a portable lithium battery grinder, which solves the problems of the weight being concentrated in the hand, making it inconvenient to carry, and the safety hazards caused by the inconvenience of disassembling the power supply unit.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a portable lithium battery grinder, comprising a grinder body, a blade, a protective cover, and a power button. The blade is disposed on the side of the grinder body, the protective cover is disposed around the blade, the power button is disposed on the outer end face of the grinder body, a control panel is disposed around the grinder body, and a handle is disposed at the rear end of the grinder body.

[0007] A separate power supply unit is provided on the side of the grip.

[0008] The main body of the grinder also includes a slide rail and a displacement protective shell. The slide rail is fixedly installed on the periphery of the main body of the grinder, and the displacement protective shell is sleeved on the upper periphery of the slide rail.

[0009] As a preferred technical solution of this utility model, the slide rail is provided in two sets, which are respectively located on the left and right sides of the control panel, and a damping connection is also established at the connection between the slide rail and the two ends of the displacement protective shell.

[0010] As a preferred technical solution of this utility model, the modular power supply unit further includes a charging slot, a power receiving electrode, a belt, a buckle, and an adjustment tooth. The charging slot is located on the side of the modular power supply unit, and the power receiving electrode is fixedly installed on the side of the modular power supply unit.

[0011] As a preferred technical solution of this utility model, the electrode is in the form of a columnar structure, and positive and negative electrode metal sheets are provided on the side away from the separate power supply unit.

[0012] As a preferred embodiment of this utility model, the waist belt is inserted inside the split-type power supply unit, the buckle is sleeved on one end of the waist belt, and the adjusting tooth is fixedly connected to the outer end face of the waist belt near the other end.

[0013] As a preferred technical solution of this utility model, the modular power supply unit has a rectangular block structure, which is filled with a lithium battery pack and is connected to the internal circuit of the power receiving electrode.

[0014] As a preferred technical solution of this utility model, the outer periphery of the end of the electrode facing the grip is provided with an annular inner groove structure, and the grip is provided with a columnar groove on the side opposite to the electrode. The inner wall of the groove near the end is provided with an annular protrusion. The annular protrusion structure is embedded in the periphery of the electrode when the electrode and the grip are connected.

[0015] Compared with the prior art, this utility model provides a portable lithium battery grinder with the following advantages:

[0016] A portable lithium-ion battery grinder features a modular power supply unit, a slide rail, a repositioning protective shell, a belt, a buckle, and adjusting teeth. To use the grinder, the operator first puts the belt around their waist, inserts the adjusting teeth through the buckle, and adjusts the teeth according to their waist size until the belt is securely fixed. The operator controls the power supply to the modular power supply unit via a power button and controls the blade speed and start / stop via a control panel. The control panel can be accessed by sliding the repositioning protective shell. When the grinder needs to be moved, the operator can remove the modular power supply unit by plugging and unplugging it, leaving only the grinder body to be carried by hand, while the modular power supply unit remains suspended at the waist. This method of carrying the grinder without the power supply module is not only lighter but also safer.

[0017] Through the above settings and processes, the structure of this grinder is different from existing grinders. It replaces the traditional one-piece grinder with a separate battery module, and the battery weight is transferred to the waist (the center of gravity area of ​​the human body). The weight of the single machine is reduced by more than 40%, the fatigue of arm operation is reduced by 60%, the grip stability is improved, the main body of the grinder without a battery compartment is easier to balance, and it is especially suitable for high-altitude or confined space operations. In addition, the separate design naturally cuts off the power supply, avoiding accidental start-up caused by accidental switch touch. The battery and motor heat source are isolated, reducing the risk of circuit overload. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the bottom structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the installation position structure of the control panel and external displacement protective shell of this utility model;

[0021] Figure 4 This is a schematic diagram of the modular power supply unit and the connection position of the belt in this utility model;

[0022] Figure 5 This is a schematic diagram showing the installation position of the adjusting teeth in this utility model.

[0023] In the diagram: 1. Grinding machine body; 101. Slide rail; 102. Displacement protection shell; 2. Blade; 3. Protective cover; 4. Power button; 5. Handle; 6. Control panel; 7. Separate power supply unit; 701. Charging slot; 702. Power electrode; 703. Belt; 704. Buckle; 705. Adjustment gear. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] In this embodiment: A portable lithium-ion battery grinder includes a grinder body 1, a blade 2, a protective cover 3, and a power button 4. The blade 2 is located on the side of the grinder body 1 and is used to cut and grind workpieces. The protective cover 3 is located around the blade 2 and provides isolation and protection for the blade 2 to prevent debris from flying. The power button 4 is located on the outer end face of the grinder body 1 and is a main control unit connected to the control circuit. A control panel 6 is located around the grinder body 1 and is used to finely control the speed and working mode of the blade 2. A handle 5 is located at the rear end of the grinder body 1. The handle 5 is used for gripping and has an internal power connection structure that connects to a rear-mounted, separate power supply unit 7.

[0026] A separate power supply unit 7 is provided on the side of the grip 5.

[0027] The main body 1 of the grinder also includes a slide rail 101 and a displacement protective shell 102. The slide rail 101 is fixedly installed on the periphery of the main body 1 of the grinder, and the displacement protective shell 102 is sleeved on the upper periphery of the slide rail 101.

[0028] In this embodiment, two sets of slide rails 101 are provided, and are respectively located on the left and right sides of the control panel 6. A damping connection is also established at the connection points of the slide rails 101 and the displacement protection shell 102. The modular power supply unit 7 also includes a charging slot 701, a power receiving electrode 702, a belt 703, a buckle 704, and an adjustment tooth 705. The charging slot 701 is opened on the side of the modular power supply unit 7, and the power receiving electrode 702 is fixedly installed on the side of the modular power supply unit 7.

[0029] Specifically, such as Figure 1 and Figure 3 As shown, the displacement protection shell 102 is made of polycarbonate and can be adjusted by sliding along the slide rail 101. The damping structure allows the displacement protection shell 102 to be suspended in any position.

[0030] It should be noted that the space covered by the slide rail 101 above the control panel 6 only occupies one-third of the entire control panel 6, mainly protecting the display screen and control keys of the control panel 6.

[0031] In this embodiment, the electrode 702 is in the form of a columnar structure, and positive and negative electrode metal sheets are provided on the side away from the separate power supply unit 7; the belt 703 is inserted into the separate power supply unit 7, the buckle 704 is sleeved on one end of the belt 703, and the adjusting tooth 705 is fixedly connected to the outer end face of the belt 703 near the other end.

[0032] Specifically, such as Figure 2 and Figure 4 As shown, the rectangular power supply unit has a Type-C charging port on the side, and the internal battery pack uses 18650 cells connected in parallel with a rated capacity of 24Ah. The waist belt 703 uses a composite structure of nylon webbing and elastic rubber, the buckle 704 is an aluminum alloy quick-release design, and the adjustment teeth 705 are spaced 5mm apart to achieve a precise waist fit.

[0033] In this embodiment, the modular power supply unit 7 has a rectangular block structure, which is filled with a lithium battery pack and is connected to the inside of the power receiving electrode 702. The end of the power receiving electrode 702 facing the handle 5 has an annular groove structure. The handle 5 and the power receiving electrode 702 have a columnar groove on the opposite side. The inner wall of the groove near the end has an annular protrusion. The annular protrusion structure is embedded in the periphery of the power receiving electrode 702 when the power receiving electrode 702 is connected to the handle 5.

[0034] Specifically, such as Figure 1 and Figure 5 As shown, the columnar electrode 702 has copper-plated silver contacts on its surface and an O-ring is embedded in the annular groove to achieve IP54 waterproof and dustproof rating.

[0035] It is important to note that the device should not be used in humid environments (air humidity > 80%) or in rainy weather to avoid short circuits that could cause electric shock. If the battery temperature exceeds 60°C, stop operation immediately to prevent thermal runaway and potential explosion.

[0036] The working principle and usage process of this utility model are as follows: When using this grinder structure, the operator first puts the waist belt 703 around their waist and inserts the adjusting tooth 705 through the buckle 704. The adjusting tooth 705 is then moved according to the operator's waist circumference until the waist belt 703 is stably fixed in the waist position. The operator controls the power supply of the split-type power supply unit 7 via the power button 4 and controls the rotation speed and start / stop of the blade 2 via the control panel 6. When using the control panel 6, the sliding protective shell 102 can be used to expose the control panel 6. When the grinder body 1 needs to be moved, the operator can pull out the split-type power supply unit 7 by plugging and unplugging, leaving only the grinder body 1 to be held by hand, while the split-type power supply unit 7 can remain suspended at the waist. Holding the grinder body 1 without the power supply module is not only easier but also safer.

[0037] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A portable lithium-ion battery grinder, comprising a grinder body (1), a blade (2), a protective cover (3), and a power button (4), wherein the blade (2) is disposed on the side of the grinder body (1), the protective cover (3) is disposed around the blade (2), the power button (4) is disposed on the outer end face of the grinder body (1), a control panel (6) is disposed around the grinder body (1), and a handle (5) is disposed at the rear end of the grinder body (1), characterized in that: The grip (5) is provided with a separate power supply unit (7) on its side; The main body (1) of the grinder also includes a slide rail (101) and a displacement protective shell (102). The slide rail (101) is fixedly installed on the periphery of the main body (1) of the grinder, and the displacement protective shell (102) is sleeved on the upper periphery of the slide rail (101).

2. The portable lithium-ion battery grinder according to claim 1, characterized in that: The slide rail (101) is provided in two sets, and is located on the left and right sides of the control panel (6) respectively. The slide rail (101) and the displacement protection shell (102) are also connected by a damping connection.

3. The portable lithium-ion battery grinder according to claim 1, characterized in that: The modular power supply unit (7) also includes a charging slot (701), a power electrode (702), a belt (703), a buckle (704), and an adjustment tooth (705). The charging slot (701) is located on the side of the modular power supply unit (7), and the power electrode (702) is fixedly installed on the side of the modular power supply unit (7).

4. A portable lithium-ion battery grinder according to claim 3, characterized in that: The electrode (702) has a columnar structure, and positive and negative electrode metal sheets are provided on the side away from the separate power supply unit (7).

5. A portable lithium-ion battery grinder according to claim 3, characterized in that: The waist belt (703) is inserted inside the split power supply unit (7), the buckle (704) is sleeved on one end of the waist belt (703), and the adjusting tooth (705) is fixedly connected to the outer end face of the waist belt (703) near the other end.

6. A portable lithium-ion battery grinder according to claim 3, characterized in that: The modular power supply unit (7) has a rectangular block structure, which is filled with a lithium battery pack and is connected to the power electrode (702) by a circuit.

7. A portable lithium-ion battery grinder according to claim 3, characterized in that: The electrode (702) has an annular groove structure on the outer periphery of the end facing the handle (5). The handle (5) has a columnar groove on the side opposite to the electrode (702), and an annular protrusion is provided on the inner wall of the groove near the end. The annular protrusion structure is embedded in the outer periphery of the electrode (702) when the electrode (702) and the handle (5) are connected.

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