Portable rechargeable lithium electric drill

Abstract

The utility model provides a portable rechargeable lithium electric drill which comprises a first shell, a driving motor is arranged in the first shell, the output end of the driving motor is fixedly connected with a chuck, the side wall of the first shell is fixedly connected with a side branch section, and the end of the side branch section and the end of the first shell are each provided with a connecting end. The connecting end comprises a first threaded section arranged on the side wall, two circles of contact rings are arranged at the end of the connecting end, the electric drill further comprises a storage battery, the storage battery comprises a second shell, a second threaded section is arranged on the inner wall of one end of the second shell, and the first threaded section is matched with the second threaded section; the end part of the second shell is provided with two spring contacts, and the spring contacts are respectively matched in different contact rings. And the storage battery can be mounted in two modes according to use requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of electric drills, in particular to a portable rechargeable lithium electric drill. Background Art

[0002] An electric drill is a drilling tool that uses electricity as its power. It is a common product among power tools and is also the most in-demand power tool product.

[0003] Existing handheld electric drills are mostly L-shaped, and this shape is generally fixed. The center of gravity of these drills is offset from the axis of the drive shaft to ensure the working end is vertical. When holding the drill, not only does a vertical force need to be applied, but also a force to offset the offset center of gravity and straighten the drill, requiring careful handling. Furthermore, the L-shaped handle, when placed in a tool box, can compromise the use of space at the handle, making it difficult to carry around. Summary of the Invention

[0004] To address the aforementioned issues, the present invention discloses a portable rechargeable lithium-ion electric drill, comprising a first housing, a drive motor disposed within the first housing, and a chuck fixedly connected to the output end of the drive motor; a side branch segment fixedly connected to the side wall of the first housing; and a connecting end disposed at each end of the side branch segment and the first housing. The connecting end includes a first threaded segment disposed on the side wall, and the end of the connecting end is provided with two contact rings. Providing connecting ends at both the side branch segment and the end of the first housing allows for two different methods of operation, thereby expanding the applicability of the electric drill.

[0005] The electric drill also includes a battery, which comprises a second housing. A second threaded segment is provided on the inner wall of one end of the second housing, and the first threaded segment engages with the second threaded segment. Two spring contacts are provided at the end of the second housing, and each spring contact engages with a different contact ring. In other words, several lithium-ion batteries are housed within the second housing. When the battery is fixedly attached to the side branch segment, its configuration is consistent with that of existing electric drills. When the battery is fixedly attached to the end of the first housing, the center of gravity of the electric drill is more oriented toward the axis of the first housing, making it easier to apply force directly to the workpiece.

[0006] Preferably, a reversing button is provided in the middle of the side branch section. The reversing button is a traditional structure with a through-type design, which is used to change the direction of the driving motor current to achieve the change of the working direction.

[0007] Preferably, a switch is provided on the side wall of the first housing, the switch being arc-shaped and extending to the side wall of the side branch section. Its arc-shaped structure can effectively trigger the switch and perform the operation regardless of whether the user is holding the first housing or the side branch section.

[0008] Preferably, a charging port is provided at one end of the second shell, and anti-slip strips are distributed on the circumference of the second shell. The charging port adopts the Type-C form factor, which is compatible with most power adapters on the market and facilitates charging. The anti-slip strips are convenient for gripping and also facilitate battery removal. Furthermore, the charging port can be located at the end where the spring contact is located, making it hidden, improving the aesthetics and electrical safety of the electric drill.

[0009] Preferably, the electric drill further comprises an end cap, the inner wall of the end cap being provided with a thread, and the thread and the first thread segment being matched. The electric drill is recommended to be installed with a battery, so the other connection end is threadedly connected to the end cap to improve the aesthetics of the device.

[0010] Preferably, a sealing gasket is provided at the end of the connection end, and the two contact rings are both on the inner side of the sealing gasket, thereby improving the safety of the power connection of the electric drill.

[0011] The beneficial effects of the present invention are as follows:

[0012] 1. There are two connection terminals, and the battery can be installed according to the needs of use to meet the needs of different usage scenarios.

[0013] 2. When the battery is installed at the end of the first shell, gripping the first shell has the advantage of saving more effort compared to existing electric drills because the force is closer to the axis of the first shell.

[0014] 3. The battery is installed on the end of the first shell, and the radial size of the first shell is smaller. At the same time, the detachable structure allows the electric drill to be placed in a tool box, occupying a smaller space and being easy to carry. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of a first embodiment of the present invention;

[0016] Figure 2 is a schematic diagram of one end of a battery of the present invention;

[0017] Figure 3 It is a structural schematic diagram of the connection end of the present invention;

[0018] Figure 4 It is a schematic diagram of the second embodiment of the present invention.

[0019] List of reference numerals:

[0020] 1. Battery; 2. End cap; 3. Side branch section; 4. Reversing button; 5. First housing; 6. Clamp; 7. Switch; 8. First threaded section; 9. Contact ring; 10. Sealing gasket;

[0021] 101. Charging port; 102. Second threaded section; 103. Second shell; 104. Spring contact; 105. Anti-slip strip. DETAILED DESCRIPTION

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, and the terms "inward" and "outward" refer to directions toward or away from the geometric center of a particular component, respectively.

[0023] like Figures 1 to 4 As shown, a portable rechargeable lithium-ion electric drill includes a first shell 5, a driving motor is provided inside the first shell 5, and the output end of the driving motor is fixedly connected to a chuck 6. Furthermore, a deceleration mechanism or an impact mechanism can be added between the driving motor and the chuck 6 to improve the applicability of the electric drill.

[0024] The side wall of the first shell 5 is fixedly connected to a side branch segment 3, the diameter of the side branch segment 3 is equal to the maximum outer diameter of the first shell 5, and the angle between the axis of the side branch segment 3 and the axis of the first shell 5 is in the range of 30 to 60 degrees. The interior of the side branch segment 3 is used to place the drive circuit for driving the motor control. The ends of the side branch segment 3 and the first shell 5 are both provided with connecting ends, that is, the ends of the side branch segment 3 and the first shell 5 can be connected to other components. The connecting end includes a first threaded segment 8 set on the side wall, which is used for connecting structure with other components. The end of the connecting end is provided with two circles of contact rings 9 for powering the drive motor, and the contact rings 9 of the two connecting ends are connected in series.

[0025] The electric drill also includes a battery 1, which includes a second shell 103. Several lithium-ion batteries and corresponding charge and discharge protection circuit boards are arranged inside the second shell 103. A second threaded segment 102 is provided on the inner wall of one end of the second shell 103. The first threaded segment 8 and the second threaded segment 102 cooperate with each other. In this way, the battery 1 is connected to the end of the side branch segment 3 or the first shell 5. Two spring contacts 104 are provided at the end of the second shell 103, and the spring contacts 104 are respectively matched in different contact rings 9. When the battery 1 is fixedly connected, the spring contacts 104 and the contact rings 9 are in close contact to realize power supply to the drive motor. At the same time, during the installation process of the battery 1, the spring contacts 104 and the contact rings 9 scrape to remove the oxides thereon, thereby ensuring the stability of the electrical connection.

[0026] In the above description, the battery 1 has two modes, which are specifically introduced as follows:

[0027] When the battery 1 is fixedly connected to the side branch section 3, the morphological structure of the electric drill is not much different from that of the existing electric drill, and the difference in the user experience is also not much, that is, the electric drill takes into account the usage mode of the transmission electric drill.

[0028] When the battery 1 is connected to the first shell 5, the geometric center of the electric drill is closer to the axis of the first shell 5 than that of the electric drill with traditional structure. In addition, the holding action of the traditional electric drill requires that the working end be vertical. When holding, it is necessary not only to provide a vertical force, but also to provide a force to offset the force of straightening the electric drill due to the shift of the center of gravity. In this installation method, it is only necessary to hold the shell 5 from the opposite side of the side branch section 3, and basically only provide a vertical force to complete the function. Compared with the traditional electric drill, this installation scheme is more labor-saving. In addition, the battery 1 is installed on the first shell 5, that is, the overall radial size of the first shell 5 is smaller than that when the battery 1 is installed on the side branch section 3, and the useless space generated when it is placed in the tool box is smaller, which can improve the convenience of carrying.

[0029] A reversing button 4 is provided in the middle of the side branch section 3. The reversing button 4 is consistent with the existing design and adopts a through-type setting to realize a disguised operation by pressing both ends.

[0030] A switch 7 is provided on the side wall of the first housing 5. The switch 7 is curved and extends to the side wall of the side branch section 3. The curved shape of the switch 7 increases the triggering range. The battery 1 is mounted on the side branch section 3. As in the conventional method, the switch 7 is triggered by holding the battery 1 in the first housing 5. The switch 7 can also be triggered by holding the battery 1 in the first housing 5. It should be noted that the diameter of the first housing 5 should be sufficient for single-handed holding.

[0031] A charging port 101 is provided at one end of the second shell 103. The charging port 101 adopts the Type-C form and is compatible with power adapters on the market for convenient charging. Anti-slip strips 105 are distributed on the circumferential surface of the second shell 103 to improve the grip feel and facilitate the disassembly and assembly of the battery 1.

[0032] The electric drill also includes an end cap 2, the inner wall of which is provided with threads that mate with the first threaded section 8. In this solution, it is recommended to install only one battery 1, so the other connection end is covered by the end cap 2, thereby improving the aesthetics of the electric drill and preventing direct exposure of the contact ring 9.

[0033] The end of the connection end is provided with a sealing gasket 10, and the two contact rings 9 are both on the inner side of the sealing gasket 10. The sealing performance of the connection end is improved to prevent liquid from entering and causing a short circuit of the line.

[0034] The technical means disclosed in the solution of the present invention are not limited to the technical means disclosed in the above-mentioned embodiment, but also include technical solutions composed of any combination of the above technical features.

Claims

1. A portable rechargeable lithium-ion drill, comprising a first housing (5), wherein a driving motor is provided inside the first housing (5), and a chuck (6) is fixedly connected to the output end of the driving motor, characterized in that: The side wall of the first shell (5) is fixedly connected to a side branch section (3), and the ends of the side branch section (3) and the first shell (5) are both provided with a connecting end, the connecting end comprising a first threaded section (8) provided on the side wall, and the end of the connecting end is provided with two circles of contact rings (9); The electric drill further comprises a battery (1), the battery (1) comprising a second housing (103), an inner wall of one end of the second housing (103) being provided with a second threaded section (102), the first threaded section (8) and the second threaded section (102) being engaged with each other, and two spring contacts (104) being provided at the end of the second housing (103), and the spring contacts (104) being engaged with different contact rings (9) respectively.

2. The portable rechargeable lithium-ion drill according to claim 1, characterized in that: A reversing button (4) is provided in the middle of the side branch section (3).

3. The portable rechargeable lithium-ion drill according to claim 1, characterized in that: A switch (7) is provided on the side wall of the first housing (5); the switch (7) is arc-shaped and extends to the side wall of the side branch section (3).

4. The portable rechargeable lithium-ion drill according to claim 1, characterized in that: A charging port (101) is provided at one end of the second shell (103), and anti-slip strips (105) are distributed on the circumferential surface of the second shell (103).

5. The portable rechargeable lithium-ion drill according to claim 1, characterized in that: The electric drill further comprises an end cover (2), the inner wall of the end cover (2) being provided with a thread, and the thread is matched with the first thread section (8).

6. The portable rechargeable lithium-ion drill according to claim 1, characterized in that: A sealing gasket (10) is provided at the end of the connection end, and the two contact rings (9) are both located inside the sealing gasket (10).

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