Hole drilling device and electric hammer using same

Abstract

The utility model relates to a drilling device and an electric hammer using the same, and belongs to the technical field of drilling tools. A concave point is formed in the handle portion of the drilling and tapping device, an electric hammer chuck protrusion can be clamped into the concave point of the handle portion, and perfect compatibility with an electric hammer clamping mechanism is achieved. According to the device, the electric hammer is endowed with the capability of accurately drilling on materials such as metal, wood and plastic, the application range of the electric hammer is greatly expanded, the electric hammer can replace an electric drill in the working scene that only rotary drilling is needed, and the tool utilization rate is increased.

Description

Technical Field

[0001] This utility model belongs to the field of drilling technology, and in particular relates to a drilling and hole-opening device and an electric hammer using the device. Background Technology

[0002] As a powerful power tool, the hammer drill combines the impact force generated by its motor with the rotational effect, applying strong impact force during the drill bit's rotation. This effectively breaks down hard materials such as concrete and brick, making it widely used in drilling operations in construction and renovation. Hammer drills also offer multiple working modes, including rotation only, impact only, and both, to meet diverse work needs. In contrast, electric drills primarily use the high-speed rotation of an electric motor to drive the drill bit, achieving precise drilling into softer or thinner materials such as metal, wood, and plastic.

[0003] In theory, a hammer drill could seem to replace a power drill when the work scenario only requires rotary drilling without impact force. However, this is not the case in practice. This is mainly due to the significant differences between hammer drills and power drills in terms of drill bit design and clamping mechanisms.

[0004] Firstly, in terms of drill bit design, hammer drill bits are typically thicker and have greater structural strength and wear resistance to withstand the combined impact and rotational forces on hard materials; while electric drill bits are relatively slender and sharp, focusing more on cutting precision and efficiency, and performing better on softer or thinner materials. Therefore, hammer drill bits often cannot achieve the same drilling effect as electric drill bits on materials such as metal, wood, and plastics.

[0005] Secondly, due to the different clamping mechanisms of electric hammers and electric drills, drill bits cannot be installed on electric hammers.

[0006] In summary, those skilled in the art urgently need to develop a drill bit that can be mounted on an electric hammer, so that the electric hammer can replace the electric drill in work scenarios where only rotary drilling is required and no impact force is needed, thereby expanding the application range of the electric hammer. Utility Model Content

[0007] To address the shortcomings of existing technologies, this utility model provides a drilling device and an electric hammer using the device, in order to solve the problems existing in the background technology.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] This utility model provides a drilling device, which is a drill bit and includes a shank and a cutting edge located at the lower end of the shank. The cutting edge has at least one chip-removing groove, and the shank has a recess. The protrusion of the hammer chuck can be engaged with the recess of the shank.

[0010] In one possible implementation, the handle is a square handle or a round handle. When the handle is specifically a square handle and its end is square, the recesses are respectively formed on the four sides of the square handle.

[0011] When the handle is specifically a round handle and its end is round, the concave points are symmetrically located on the left and right sides of the open groove.

[0012] In one possible implementation, when the drill bit is specifically a twist drill, it also includes a tip located at the lower end of the cutting edge. The tip has two symmetrical cutting edges, and the included angle formed by the cutting edges is α, where 115°≤α≤150°.

[0013] In one possible implementation, the cutting groove is spiral-shaped.

[0014] In one possible implementation, when the drill bit is specifically a step drill, the cutting edge has a conical structure and consists of several drill edges with increasing diameters from bottom to top, with two adjacent drill edges connected by a transition conical surface.

[0015] This utility model provides a drilling and opening device. When the device is a hole opener, it includes a handle and a cylindrical part located at the lower end of the handle. The handle has a recess, and the protrusion of the electric hammer chuck can be inserted into the recess of the handle.

[0016] In one possible implementation, the handle is a square handle or a round handle. When the handle is specifically a square handle and its end is square, the recesses are respectively formed on the four sides of the square handle.

[0017] When the handle is specifically a round handle and its end is round, the concave points are symmetrically located on the left and right sides of the open groove.

[0018] In one possible implementation, the cylindrical portion is provided with serrations.

[0019] In one possible implementation, the hole opener further includes a positioning drill and a spring, the positioning drill being mounted at the lower end of the shank, and the spring being sleeved on the outside of the positioning drill.

[0020] This utility model provides an electric hammer, which has the above-mentioned drilling device, and the handle of the drilling device is installed at the chuck of the electric hammer.

[0021] This utility model proposes a drilling device and an electric hammer using the device. The shank of the drilling device has a recessed point, which can firmly engage with the protrusion of the electric hammer chuck, achieving perfect compatibility between the device and the electric hammer clamping mechanism. This gives the electric hammer a new ability to perform precise rotary drilling on soft or thin materials such as metal, wood, and plastic, greatly expanding the application boundaries of the electric hammer and allowing it to replace the electric drill in work scenarios where only rotary drilling is required and no impact force is needed, thus significantly improving the utilization rate of the electric hammer. Attached Figure Description

[0022] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and to implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0023] Figure 1 This is a schematic diagram of the drilling and hole-opening device in Embodiment 1;

[0024] Figure 2 This is a schematic diagram of the drilling and hole-opening device in Embodiment 2;

[0025] Figure 3 This is a schematic diagram of the drilling and hole-opening device in Embodiment 3;

[0026] Figure 4 This is a schematic diagram of the drilling and hole-opening device in Embodiment 4;

[0027] Figure 5 This is a schematic diagram of the drilling and hole-opening device in Example 5. Figure 1 ;

[0028] Figure 6 This is a schematic diagram of the drilling and hole-opening device in Example 5. Figure 2 ;

[0029] Figure 7 This is a schematic diagram of the drilling and hole-opening device in Embodiment Six;

[0030] 1-Stalk; 11-Dimple; 12-Open groove; 2-Cutting edge; 21-Cutting groove; 22-Drill bit; 3-Point; 4-Cylinder; 41-Saw tooth; 5-Positioning drill; 6-Spring. Detailed Implementation

[0031] 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 a part of the embodiments of the present utility model, and not all of them. 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. In addition, for the sake of convenience, the terms "upper," "lower," "left," and "right" are equivalent to the upper, lower, left, and right directions of the accompanying drawings themselves, and the terms "first," "second," etc., are used for descriptive purposes and have no other special meaning.

[0032] Firstly, in view of the problems existing in the prior art, this utility model provides a drilling and hole-opening device, which can be a drill bit or a hole opener, as detailed below:

[0033] 1-Drill bit

[0034] When the device is a drill bit, it includes a shank and a cutting edge located at the lower end of the shank. The cutting edge has at least one chip-removing groove, and the shank has a recess. The protrusion of the hammer chuck can be engaged with the recess of the shank.

[0035] In specific applications, a drill bit consists of a shank and a cutting edge. The shank is the key part connecting the hammer chuck and the cutting edge, responsible for transmitting the power of the hammer. The cutting edge is the part that actually performs the cutting operation. The grooves on it not only help with chip removal—that is, the chips generated during drilling can be smoothly discharged through the grooves to avoid clogging and affecting drilling efficiency—but also enhance the cutting performance of the drill bit.

[0036] The recessed points on the shank correspond to the protrusions of the hammer drill chuck, ensuring a secure engagement. This solves the incompatibility problem between traditional hammer drills and electric drill bits, allowing the drill bit of this application to be stably mounted on the hammer drill, thus enabling precise rotary drilling of soft or thin materials.

[0037] Furthermore, the shape of the concave points can be determined according to the specific protrusion shape of the hammer drill chuck to ensure optimal engagement; the size of the concave points needs to take into account the size of the drill bit and the specifications of the hammer drill chuck to ensure stable engagement; the number of concave points can be determined according to the shape and size of the shank and the required engagement strength, ensuring sufficient engagement force while avoiding excessive impact on the structural strength of the shank. Therefore, without affecting the working performance of the drill bit, those skilled in the art can select the shape, size, and number of protrusions according to actual needs, and changes in the shape, size, and number of protrusions do not affect the scope of protection of this application.

[0038] In some examples, the handle is a square handle or a round handle. When the handle is specifically a square handle, and its end is square, the recesses are respectively opened on the four sides of the square handle.

[0039] When the handle is specifically a round handle, and its end is round, the concave points are symmetrically located on the left and right sides of the open groove.

[0040] In specific applications, the shank comes in two forms: square and round. This is to accommodate different models and specifications of hammer drill chucks. Square and round shanks are two common clamping methods in hammer drill chucks. Therefore, providing these two shank shapes ensures that the drilling and opening device of this application can be widely used on various hammer drills.

[0041] When the shank end is square, the recesses are respectively made on the four sides of the square shank, so as to ensure that no matter which direction the hammer chuck clamps the drill bit, there will be a corresponding recess to achieve a firm engagement; when the shank end is round, the recesses are symmetrically located on the left and right sides of the open slot, which not only ensures the stability of the clamping, but also facilitates the quick and accurate clamping of the hammer chuck.

[0042] In some examples, when the drill bit is specifically a twist drill, it also includes a tip located at the lower end of the cutting edge. The tip has two symmetrical cutting edges, and the included angle formed by the cutting edges is α, where 115°≤α≤150°.

[0043] In specific applications, twist drills are a common drilling tool, known for their unique helical cutting grooves and sharp tips. In addition to the basic shank and cutting edge structure, a twist drill bit also has a tip. This tip, located at the lower end of the cutting edge, is the part of the drill bit that first contacts and penetrates the material, and it is crucial for drilling efficiency and accuracy.

[0044] The twist drill has two symmetrical cutting edges at its tip, which cut the material during drilling. The angle between the cutting edges is marked α, and α is between 115° and 150°. If the angle α is too small, the cutting edges may be too sharp, which, while making it easier to cut into the material, may also lead to premature wear of the cutting edges and reduce the drill bit's lifespan. Conversely, if the angle α is too large, the cutting efficiency of the cutting edges may decrease, making the drilling process more laborious and time-consuming. Therefore, controlling the angle α between 115° and 150° ensures both cutting efficiency and drill bit durability. This allows the twist drill to achieve more precise and efficient drilling operations in soft or thin materials such as metal, wood, and plastic.

[0045] In some examples, the cutting groove is spiral-shaped.

[0046] In specific applications, the drill bit's cutting edge design incorporates a unique helical chip-removing groove. This not only efficiently guides chips out of the hole along a helical path during drilling, reducing drilling resistance and improving drilling efficiency, but also helps remove heat generated during the chip removal process, thus providing a cooling effect. Furthermore, when used with lubricant, the helical groove evenly distributes the lubricant, improving lubrication and reducing drill bit wear.

[0047] In some examples, when the drill bit is specifically a step drill, the cutting edge has a conical structure and consists of several drill edges with increasing diameters from bottom to top, with two adjacent drill edges connected by a transition conical surface.

[0048] In specific applications, a step drill is a special type of drill bit with a tapered cutting edge that gradually increases the hole diameter during drilling. Specifically, the step drill's cutting edge consists of several drill bits with progressively increasing diameters from bottom to top, each responsible for drilling a different diameter section of the hole. Adjacent drill bits are connected by a smooth transition tapered surface, ensuring the continuity and stability of the drilling process.

[0049] 2-Hole opener

[0050] When the device is a hole opener, it includes a handle and a cylindrical part located at the lower end of the handle. The handle has a recessed point, and the protrusion of the electric hammer chuck can be inserted into the recessed point of the handle.

[0051] In specific application scenarios, this application proposes a drilling and hole-opening device used as a hole opener, in addition to the drill bit design. A hole opener, as a specialized drilling tool, is mainly used to create large-diameter holes or circular cuts in materials. The hole opener of this application includes a shank and a cylindrical portion located at the lower end of the shank. The shank, as the part connected to the hammer drill chuck, plays a crucial role in transmitting power and stabilizing the hole opener.

[0052] The hole saw's shank also has recessed points, allowing the protrusions of the hammer drill chuck to be securely engaged. This not only ensures the stable installation of the hole saw on the hammer drill but also enables the hammer drill to create large-diameter holes or circular cuts, further expanding its application range.

[0053] In some examples, the handle is a square handle or a round handle. When the handle is specifically a square handle, and its end is square, the recesses are respectively opened on the four sides of the square handle.

[0054] When the handle is specifically a round handle, and its end is round, the concave points are symmetrically located on the left and right sides of the open groove.

[0055] In specific applications, the hole saw comes in two forms: square and round, to accommodate the clamping requirements of different hammer drill chucks. When the handle is square, with a rectangular end, recesses are formed on each of the four sides of the handle. These recesses match the protrusions of the hammer drill chuck, ensuring a secure installation of the hole saw within the chuck and preventing loosening or detachment during operation.

[0056] When the shank is square but the ends are rounded, the layout of the recesses is adjusted accordingly. Specifically, the recesses are symmetrically positioned on both sides of the open slot. This ensures a secure engagement between the hole saw and the hammer drill chuck, providing a stable drilling environment.

[0057] In some examples, the cylindrical portion has serrations.

[0058] In specific applications, serrations are added to the cylindrical section to accommodate the need to create circular holes in materials. These serrations are located on the edge of the cylindrical section, which not only enhances the stability and cutting efficiency of the hole saw during operation but also makes the hole-making process smoother.

[0059] In some examples, the hole opener also includes a locating drill and a spring, with the locating drill mounted at the lower end of the shank and the spring sleeved on the outside of the locating drill.

[0060] In specific applications, to make the drilling process more stable and precise, the hole saw is equipped with a positioning drill and a spring assembly. Specifically, the positioning drill is cleverly installed at the lower end of the hole saw shank, serving to accurately position the hole before drilling. The spring is sleeved on the outside of the positioning drill, and its elasticity ensures that the positioning drill maintains appropriate pressure during drilling, preventing damage to the material due to excessive pressure or deviation from the predetermined position due to insufficient pressure.

[0061] On the other hand, in view of the problems existing in the prior art, the present invention provides an electric hammer, characterized in that the electric hammer has the above-mentioned drilling device, and the handle of the drilling device is installed at the chuck of the electric hammer.

[0062] In specific application scenarios, electric hammers include not only drilling and opening devices and chucks, but also components such as motors and switches. Since the motors, switches and other components are existing technologies, this application will not elaborate on them again.

[0063] Example 1

[0064] Based on the above concept, this embodiment provides a drill bit for a specific application scenario, such as... Figure 1 As shown, the device includes a handle 1 and a cutting edge 2 located at the lower end of the handle 1. A chip removal groove 21 is provided on the cutting edge 2, and a recess 11 is provided on the handle 1. The protrusion of the electric hammer chuck can be inserted into the recess 11 of the handle 1.

[0065] In an example, such as Figure 1 As shown, when the handle 1 is specifically a square handle and its end is square, the recesses 11 are respectively opened on the four sides of the square handle 1.

[0066] In an example, such as Figure 1 As shown, when the drill bit is specifically a twist drill, it also includes a tip 3, which is located at the lower end of the cutting edge 2. The tip 3 has two symmetrical cutting edges, and the included angle α formed by the cutting edges is 135°.

[0067] In an example, such as Figure 1 As shown, the cutting groove 21 is spiral-shaped.

[0068] Example 2

[0069] Based on the above concept, this embodiment provides a drill bit for a specific application scenario, such as... Figure 2 As shown, the device includes a handle 1 and a cutting edge 2 located at the lower end of the handle 1. A chip removal groove 21 is provided on the cutting edge 2, and a recess 11 is provided on the handle 1. The protrusion of the electric hammer chuck can be inserted into the recess 11 of the handle 1.

[0070] In an example, such as Figure 2 As shown, when the handle 1 is specifically a round handle and its end is round, the concave point 11 is symmetrically located on the left and right sides of the open groove 12.

[0071] In an example, such as Figure 2 As shown, when the drill bit is specifically a twist drill, it also includes a tip 3, which is located at the lower end of the cutting edge 2. The tip 3 has two symmetrical cutting edges, and the included angle α formed by the cutting edges is 135°.

[0072] In an example, such as Figure 1 As shown, the cutting groove 21 is spiral-shaped.

[0073] Example 3

[0074] Based on the above concept, this embodiment provides a drill bit for a specific application scenario, such as... Figure 3 As shown, the device includes a handle 1 and a cutting edge 2 located at the lower end of the handle 1. The cutting edge 2 has four chip-removing grooves 21. The handle 1 has a recess 11. The protrusion of the electric hammer chuck can be inserted into the recess 11 of the handle 1.

[0075] In an example, such as Figure 3 As shown, when the handle 1 is specifically a square handle and its end is square, the recesses 11 are respectively opened on the four sides of the square handle 1.

[0076] In an example, such as Figure 3As shown, when the drill bit is specifically a stepped drill, the cutting edge 2 has a cone-shaped structure, and it consists of several drill edges 22 with increasing diameters from bottom to top. Two adjacent drill edges 22 are connected by a transition cone surface.

[0077] Example 4

[0078] Based on the above concept, this embodiment provides a drill bit for a specific application scenario, such as... Figure 4 As shown, the device includes a handle 1 and a cutting edge 2 located at the lower end of the handle 1. The cutting edge 2 has four chip-removing grooves 21. The handle 1 has a recess 11. The protrusion of the electric hammer chuck can be inserted into the recess 11 of the handle 1.

[0079] In an example, such as Figure 4 As shown, when the handle 1 is specifically a round handle and its end is round, the concave point 11 is symmetrically located on the left and right sides of the open groove 12.

[0080] In an example, such as Figure 4 As shown, when the drill bit is specifically a stepped drill, the cutting edge 2 has a cone-shaped structure, and it consists of several drill edges 22 with increasing diameters from bottom to top. Two adjacent drill edges 22 are connected by a transition cone surface. Example 5

[0081] Based on the above concept, such as Figure 5-6 As shown in the figure, this embodiment provides a hole punch for a specific application scenario, such as... Figure 6 As shown, the device includes a handle 1 and a cylindrical part 4 located at the lower end of the handle 1. The handle 1 has a recess 11, and the protrusion of the electric hammer chuck can be inserted into the recess 11 of the handle 1.

[0082] In an example, such as Figure 5 As shown, when the handle 1 is specifically a square handle and its end is square, the recesses 11 are respectively opened on the four sides of the square handle 1.

[0083] In an example, such as Figure 5 As shown, the cylindrical part 4 has serrations 41.

[0084] In an example, such as Figure 6 As shown, the hole opener also includes a positioning drill 5 and a spring 6. The positioning drill 5 is installed at the lower end of the shank 1, and the spring 6 is sleeved on the outside of the positioning drill 5. Example 6

[0085] Based on the above concept, this embodiment provides a hole punch for a specific application scenario, such as... Figure 7 As shown, the device includes a handle 1 and a cylindrical part 4 located at the lower end of the handle 1. The handle 1 has a recess 11, and the protrusion of the electric hammer chuck can be inserted into the recess 11 of the handle 1.

[0086] In an example, such as Figure 7 As shown, when the handle 1 is specifically a round handle and its end is round, the concave point 11 is symmetrically located on the left and right sides of the open groove 12.

[0087] In an example, such as Figure 7 As shown, the cylindrical part 4 has serrations 41.

[0088] In an example, such as Figure 7 As shown, the hole opener also includes a positioning drill 5 and a spring 6. The positioning drill 5 is installed at the lower end of the shank 1, and the spring 6 is sleeved on the outside of the positioning drill 5.

[0089] The above embodiments merely illustrate the implementation of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A drilling and opening device, characterized in that, When the device is a drill bit, it includes a shank (1) and a cutting edge (2) located at the lower end of the shank (1). The cutting edge (2) has at least one chip-removing groove (21), and the shank (1) has a recess (11). The protrusion of the electric hammer chuck can be inserted into the recess (11) of the shank (1).

2. The drilling and hole-opening device according to claim 1, characterized in that, The handle (1) is a square handle or a round handle. When the handle (1) is specifically a square handle and its end is square, the recesses (11) are respectively opened on the four sides of the square handle (1). When the handle (1) is specifically a round handle and its end is round, the concave point (11) is symmetrically located on the left and right sides of the open groove (12).

3. The drilling and hole-opening device according to claim 1, characterized in that, When the drill bit is specifically a twist drill, it also includes a tip (3), which is located at the lower end of the cutting edge (2). The tip (3) has two symmetrical cutting edges, and the included angle formed by the cutting edges is α, 115°≤α≤150°.

4. The drilling and hole-opening device according to claim 3, characterized in that, The groove (21) is spiral-shaped.

5. A drilling and hole-opening device according to claim 1, characterized in that, When the drill bit is specifically a step drill, the cutting edge (2) has a cone-shaped structure and consists of several drill edges (22) with increasing diameter from bottom to top. Two adjacent drill edges (22) are connected by a transition cone surface.

6. A drilling and hole-opening device, characterized in that, When the device is a hole opener, it includes a handle (1) and a cylindrical part (4) located at the lower end of the handle (1). The handle (1) has a recess (11) and the protrusion of the electric hammer chuck can be inserted into the recess (11) of the handle (1).

7. A drilling and hole-opening device according to claim 6, characterized in that, The handle (1) is a square handle or a round handle. When the handle (1) is specifically a square handle and its end is square, the recesses (11) are respectively opened on the four sides of the square handle (1). When the handle (1) is specifically a round handle and its end is round, the concave point (11) is symmetrically located on the left and right sides of the open groove (12).

8. A drilling and hole-opening device according to claim 1, characterized in that, The cylindrical part (4) is provided with serrations (41).

9. A drilling and hole-opening device according to claim 6, characterized in that, The hole opener also includes a positioning drill (5) and a spring (6). The positioning drill (5) is installed at the lower end of the shank (1), and the spring (6) is sleeved on the outside of the positioning drill (5).

10. An electric hammer, characterized in that, The electric hammer has a drilling device as described in any one of claims 1-9, wherein the handle (1) of the drilling device is mounted on the chuck of the electric hammer.

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