Electric drill

Abstract

The utility model discloses an electric drill which comprises a push button, a limiting frame installed on the push button, a gear box and an inner gear ring arranged in the gear box. A mounting hole penetrating through the peripheral wall of the gearbox is formed in the gearbox, the limiting frame is inserted into the mounting hole and connected with the inner gear ring, and when the push button is operated to drive the limiting frame, the inner gear ring can move in the axial direction of the gearbox; the limiting frame comprises an insertion section inserted into the gearbox, and when the limiting frame is inserted in the preset direction, the insertion section is inserted into the mounting hole. In the assembling process of the electric drill, the limiting frame can be assembled on the push button in advance, and then the inserting section of the limiting frame is directly inserted into the mounting hole in the preset direction till the limiting frame is matched with the inner gear ring. When the push button is operated to drive the limiting frame, the inner gear ring can move in the axial direction of the gearbox, and therefore the speed regulation function of the electric drill is achieved. According to the electric drill, the installation mode of a traditional tensioning limiting frame is abandoned, the operation process is simplified through direct insertion type assembly, and the assembly efficiency and convenience are remarkably improved.

Description

Technical Field

[0001] This application belongs to the field of power tool technology, specifically relating to an electric drill. Background Technology

[0002] An electric drill is a portable power tool that uses electricity to drive a drill bit to rotate at high speed. It is widely used in construction, decoration, and repair, and can quickly drill holes in materials such as wood and metal. Variable speed electric drills are equipped with a speed adjustment mechanism, which includes a speed adjustment knob, a speed adjustment cable, and a gearbox. The gearbox has symmetrical mounting holes on both sides, and the speed adjustment cable must slide into these holes from both sides to complete the assembly. Current installation methods require inserting one end of the speed adjustment cable into one side of the mounting hole, and then tensioning the cable to open both ends so that the other end can be inserted into the opposite mounting hole. This assembly method is inconvenient and inefficient.

[0003] Therefore, it is necessary to provide an electric drill to address the aforementioned technical problems. Utility Model Content

[0004] The purpose of this application is to provide an electric drill that solves the problem of inconvenient installation of the speed control wire in the aforementioned electric drill.

[0005] To achieve the above objectives, a specific embodiment of this application provides the following technical solution:

[0006] An electric drill includes a push button, a limiting bracket mounted on the push button, a gearbox, and an internal gear ring disposed within the gearbox;

[0007] The gearbox has a mounting hole that penetrates its peripheral wall. The limiting bracket is inserted into the mounting hole and connected to the internal gear ring. When the push button is operated to drive the limiting bracket, the internal gear ring can move along the axial direction of the gearbox.

[0008] The limiting bracket includes an insertion section that is inserted into the gearbox. When the limiting bracket is inserted in a preset direction, the insertion section is inserted into the mounting hole.

[0009] In one or more embodiments of this application, the preset direction is parallel to the opening direction of the mounting hole.

[0010] In one or more embodiments of this application, the opening direction of the mounting hole is perpendicular to the plane where the push button is located.

[0011] In one or more embodiments of this application, the mounting hole is disposed on the side of the gearbox near the push button.

[0012] In one or more embodiments of this application, the mounting hole is closed on the maximum sector projection about the axis of rotation of the internal gear ring.

[0013] In one or more embodiments of this application, the outer peripheral wall of the internal gear ring is provided with a first limiting part and a second limiting part that are disposed opposite to each other, and an annular groove is formed between the first limiting part and the second limiting part.

[0014] The limiting bracket includes an extension portion inserted into the annular groove and disposed between the first limiting portion and the second limiting portion, wherein the extension direction of the extension portion is parallel to the opening direction of the mounting hole.

[0015] In one or more embodiments of this application, two mounting holes are configured, the limiting frame includes two oppositely arranged insertion sections, the mounting holes correspond one-to-one with the insertion sections, and the minimum distance between the two mounting holes is greater than the bottom diameter of the annular groove.

[0016] In one or more embodiments of this application, the limiting frame includes two oppositely arranged insertion sections, and the distance between the two insertion sections gradually decreases in the direction away from the push button when no external force is applied.

[0017] In one or more embodiments of this application, the push button is further provided with a transition part on the side near the gearbox. The transition part is fixedly connected to the limiting frame. The limiting frame includes a connecting section for connecting with the transition part, and the connecting section is bent.

[0018] In one or more embodiments of this application, the push button further includes an extension connected to the adapter, the extension extending along the extension direction of the limiting frame and fixedly connected to the limiting frame.

[0019] Compared with existing technologies, in the assembly process of the electric drill of this application, the limiting frame can be pre-assembled on the push button, and then the insertion section of the limiting frame is directly inserted into the mounting hole along a preset direction until the limiting frame and the internal gear ring are engaged. When the push button is operated to drive the limiting frame, the internal gear ring can move axially along the gearbox, thereby realizing the speed adjustment function of the electric drill. The electric drill of this application abandons the traditional installation method of tensioning the limiting frame, simplifies the operation process through direct insertion assembly, and significantly improves assembly efficiency and convenience. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of an electric drill in one embodiment of this application;

[0022] Figure 2 This is an explosion diagram of an electric drill in one embodiment of this application;

[0023] Figure 3 This is a cross-sectional schematic diagram of the electric drill gearbox and internal gear ring in one embodiment of this application;

[0024] Figure 4 This is a cross-sectional schematic diagram of an electric drill according to one embodiment of this application;

[0025] Figure 5 This is a cross-sectional schematic diagram of a drill limit frame in one embodiment of this application, where no external force is applied.

[0026] Explanation of key figure labels:

[0027] 1. Push button; 11. Plate body; 12. Protrusion; 13. Adapter; 14. Extension; 2. Limiting frame; 21. Insertion section; 22. Connecting section; 3. Gearbox; 31. Mounting hole; 4. Internal gear ring; 41. First limiting part; 42. Second limiting part; 43. Annular groove. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of this application.

[0029] Reference Figure 1 and Figure 2 In one embodiment of this application, the electric drill includes a push button 1, a limiting bracket 2 mounted on the push button 1, a gearbox 3, and an internal gear ring 4 disposed within the gearbox 3. The gearbox 3 has a mounting hole 31 penetrating its peripheral wall. The limiting bracket 2 is inserted into the mounting hole 31 and connected to the internal gear ring 4. When the push button 1 is operated to move the limiting bracket 2, the internal gear ring 4 can move axially along the gearbox 3. The limiting bracket 2 includes an insertion section 21 inserted into the gearbox 3. When the limiting bracket 2 is inserted in a preset direction, the insertion section 21 is inserted into the mounting hole 31. In this embodiment, the preset direction is parallel to the opening direction of the mounting hole 31. Therefore, when installing the limiting bracket 2 into the gearbox 3, the limiting bracket 2 can be quickly inserted into the mounting hole 31 in the preset direction. Since the limiting bracket 2 does not need to be installed by tensioning, the operation process is simplified, making installation faster and more convenient.

[0030] Understandably, the insertion segment 21 can be set straight to facilitate quick insertion into the mounting hole 31. Of course, the insertion segment can also be appropriately bent according to actual installation needs. This application does not impose specific restrictions on the form of the insertion segment, as long as it can be accurately inserted into the mounting hole 31 along the preset direction and can cooperate to abut against the moving internal gear ring 4.

[0031] Reference Figure 2 The mounting hole 31 can be perpendicular to the plane of the push button 1. The push button 1 includes a plate body 11 and a protrusion 12 extending from the plate body 11, facilitating the operator to push the push button 1. In this embodiment, the plane of the push button 1 refers to the plane of the plate surface of the plate body 11 of the push button 1. The mounting hole 31 can be configured on the side of the gearbox 3 near the push button 1. With the above structural configuration, when installing the limiting frame 2, the limiting frame 2 can be quickly installed into the gearbox 3 along a preset direction, which is more time-saving and efficient.

[0032] Reference Figure 3 The mounting hole 31 is closed on the maximum sector projection of the rotation axis around the internal gear ring 4. That is, from the rotation axis of the internal gear ring 4 towards the mounting hole 31, the hole wall of the mounting hole 31 blocks the opening of the mounting hole 31. When the overall machine heats up due to ambient temperature and operating load, the viscosity of the grease in the gearbox 3 decreases. The existing mounting holes 31 on the gearbox 3 are opened in the radial direction of the gearbox 3. After long-term use, oil leakage is likely to occur from the mounting holes 31, and grease may even splash out directly through the radially set mounting holes 31. In this embodiment, the opening form of the mounting hole 31 can improve the convenience of installing the limit bracket 2 on the one hand; on the other hand, its structural form can also minimize the occurrence of radial oil leakage.

[0033] Reference Figure 2 and Figure 4 The outer peripheral wall of the internal gear ring 4 is provided with a first limiting portion 41 and a second limiting portion 42 that are oppositely disposed, and an annular groove 43 is formed between the first limiting portion 41 and the second limiting portion 42; the limiting frame 2 includes an extension portion inserted into the annular groove 43 and disposed between the first limiting portion 41 and the second limiting portion 42, and the extension direction of the extension portion is parallel to the opening direction of the mounting hole 31. The first limiting portion 41 and the second limiting portion 42 can be arranged in annular form to form the annular groove 43 between them. It is understood that the arrangement of the first limiting portion 41 and the second limiting portion 42 can also be set in other shapes, and this embodiment does not impose specific limitations on this.

[0034] When the limiting bracket 2 is inserted into the mounting hole 31, the outer peripheral wall of the extended portion of the limiting bracket 2 can abut against the first limiting part 41 and the second limiting part 42. When the operating push button 1 drives the limiting bracket 2, the internal gear ring 4 can move axially along the gearbox 3, thereby realizing the speed adjustment of the electric drill. In this embodiment, the outer peripheral wall of the extended portion of the limiting bracket 2 abuts against the first limiting part 41 and the second limiting part 42, which can limit the movement of the internal gear ring 4. Figure 4 The internal gear ring 4 rotates vertically in the plane it is in. Therefore, when the limit frame 2 pushes the internal gear ring 4 to move, the internal gear ring 4 only has the degree of freedom to move axially along the gearbox 3, and does not have the degree of freedom to rotate vertically, ensuring the reliability of speed regulation.

[0035] Furthermore, the mounting hole 31 is a strip-shaped hole, and the strip-shaped extension direction of the hole is parallel to the direction in which the push button 1 can be pushed, so as to ensure that the push button 1 can drive the limit frame 2 to move, and further drive the internal gear ring 4 to move.

[0036] Reference Figure 4 The mounting holes 31 are configured in two ways. The limiting frame 2 includes two oppositely arranged insertion sections 21. The mounting holes 31 correspond one-to-one with the insertion sections 21, and the minimum distance between the two mounting holes 31 is greater than the bottom diameter of the annular groove 43. Therefore, when the limiting frame 2 is inserted into the mounting hole 31 and its extended portion abuts against the first limiting part 41 and the second limiting part 42, there is a gap between the limiting frame 2 and the bottom of the annular groove 43 to reduce friction with the outer peripheral wall of the internal gear ring 4. It can be understood that the limiting frame 2 can be composed of two separately arranged limiting rods, each of which is provided with one of the aforementioned insertion sections 21. Alternatively, the limiting frame 2 can also be formed by bending a single limiting rod, with the two bent portions respectively provided with the aforementioned insertion sections 21. In this embodiment, the specific structural form of the limiting frame 2 is not limited.

[0037] Reference Figure 5 In this embodiment, without external force, the distance between the two insertion segments 21 gradually decreases in the direction away from the push button 1. The limiting frame 2 can be made of steel wire, giving the insertion segments 21 a certain elastic deformation capability. Therefore, when the limiting frame 2 is installed in the mounting, the two insertion segments 21 have a certain clamping force, ensuring the effectiveness of the installation.

[0038] Reference Figure 5 The push button 1 has an adapter 13 near the gearbox 3. The adapter 13 is fixedly connected to the limiting frame 2. The limiting frame 2 includes a connecting section 22 for connecting to the adapter 13. The connecting section 22 is bent. A through hole is provided in the adapter 13, and the connecting section 22 can pass through the through hole. The bent design of the connecting section 22 ensures the effectiveness of the connection between it and the adapter 13. In this embodiment, the connecting section 22 is connected to the insertion section 21.

[0039] In an optional embodiment, the push button 1 further includes an extension 14 connected to the adapter 13. The extension 14 extends along the extending direction of the limiting frame 2 and is fixedly connected to the limiting frame 2. Specifically, the extension 14 can extend away from the adapter 13, and the limiting frame 2 is fixedly fitted to the extension 14. The extension 14 can also have a through hole, and the connecting section 22 can pass through the through hole. Therefore, the extension 14 can adapt to the shape of the limiting frame 2 so that there is a certain distance between the two insertion sections 21 of the limiting frame 2.

[0040] Therefore, during the assembly process of the electric drill of this application, the limiting frame 2 can be directly inserted into the mounting hole 31 along a preset direction until the limiting frame 2 and the internal gear ring 4 are engaged. When the operating push button 1 drives the limiting frame 2, the internal gear ring 4 can move axially along the gearbox 3, thereby realizing the speed adjustment function of the electric drill. The electric drill of this application abandons the traditional installation method of tensioning the limiting frame 2, and simplifies the operation process through direct insertion assembly, significantly improving assembly efficiency and convenience. At the same time, in this application, the peripheral wall of the extended part of the limiting frame 2 abuts against the first limiting part 41 and the second limiting part 42, which can restrict the internal gear ring 4 from rotating in the vertical direction, ensuring the reliability of the speed adjustment operation. Finally, the opening direction of the mounting hole 31 can also minimize the occurrence of radial oil leakage in the gearbox 3.

[0041] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this application. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0042] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

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