Buffering support and handheld hole drilling device

Abstract

A buffering support and a handheld hole drilling device. The buffering support comprises a telescopic sleeve (10), a damping buffer member (20), and a positioning assembly (30). The telescopic sleeve (10) is telescopic and is internally provided with a cavity structure for a drill bit of a handheld drill (200) to pass through, and the rear end of the telescopic sleeve (10) is used for sleeving and being connected to an output end of the handheld drill (200) in a locking manner. The damping buffer member (20) is fixedly connected to one side of the telescopic sleeve (10), and the damping buffer member (20) is used for enabling the drill bit of the handheld drill (200) to advance at a constant speed. The positioning assembly (30) is rotatably arranged at the front end of the telescopic sleeve (10), and the positioning assembly (30) is used for positioning a member to be drilled.

Description

Buffer stand and handheld drilling device Technical Field

[0001] The present invention relates to the technical field of drilling processing, and in particular to a buffer bracket and a handheld drilling device. Background Art

[0002] A pneumatic drill is a handheld pneumatic tool primarily used for drilling holes in metal components, particularly thin-walled housings and light alloys like aluminum and magnesium. It is widely used in industries such as home appliance manufacturing, home renovation, automotive and shipbuilding, and aerospace manufacturing and maintenance. Its high power and spark-free nature make it highly safe, making it particularly effective in gassy mines.

[0003] During the processing, traditional air drills use pneumatic power to drill holes, so their drilling capacity is greatly affected by air pressure and is unstable. At the same time, due to the influence of vibration during the processing or human factors, there are deviations in force and operation, which may cause rotation or shaking, affecting the positioning accuracy of the air drill and causing inaccurate processing. Summary of the Invention

[0004] The present invention provides a buffer bracket, which can assist a handheld drill in processing, improve positioning accuracy, reduce errors caused by rotation or shaking due to vibration, and improve the processing effect and efficiency of the handheld drill.

[0005] The present invention adopts the following technical solutions:

[0006] Buffer bracket, including:

[0007] A telescopic sleeve, the telescopic sleeve is retractable and has a cavity structure inside for the drill bit of the handheld drill to pass through, and the rear end of the telescopic sleeve is used to be sleeved and locked to the output end of the handheld drill;

[0008] a damping buffer, fixedly connected to one side of the telescopic sleeve, the damping buffer being used to enable the drill bit of the handheld drill to advance at a uniform speed;

[0009] A positioning assembly is rotatably arranged at the front end of the telescopic sleeve, and the positioning assembly is used to position the piece to be drilled.

[0010] In some embodiments, the telescopic sleeve includes a first sleeve and a second sleeve, the first sleeve is sleeved and slidably connected to the second sleeve, the end of the first sleeve away from the second sleeve is used to sleeve and lockably connect to the output end of the handheld drill, the positioning assembly is rotatably connected to the end of the second sleeve away from the first sleeve, one end of the damping buffer is connected to the first sleeve, and the other end is connected to the second sleeve.

[0011] In some embodiments, the first sleeve is provided with a mounting hole, in which a fastener is provided, and the second sleeve is provided with a strip-shaped hole extending along its own axis, and an end of the fastener extends into the strip-shaped hole to limit the relative displacement between the first sleeve and the second sleeve;

[0012] Or the second sleeve is provided with a mounting hole, a fastener is screwed into the mounting hole, and the first sleeve is provided with a strip hole extending along its own axial direction, and the end of the fastener extends into the strip hole to limit the relative displacement between the first sleeve and the second sleeve.

[0013] In some embodiments, a fixing bracket is installed on the outer wall of the telescopic sleeve adjacent to the positioning assembly, and the fixing bracket connects the damping buffer to the front of the telescopic sleeve; relative to the front end face of the positioning assembly, the front end face of the fixing bracket is closer to the rear end face of the telescopic sleeve.

[0014] In some embodiments, a clamping assembly is provided at the rear end of the telescopic sleeve, and the clamping assembly includes a locking sleeve and a clamping block. The damping buffer is connected to the rear end of the telescopic sleeve through the locking sleeve, and the locking sleeve is used to be sleeved on the output end of the handheld drill. The locking sleeve is provided with an opening, and the clamping block is detachably connected to both sides of the opening to lock the opening.

[0015] In some embodiments, a connecting platform is provided at one end of the locking sleeve away from the opening to connect the damping buffer component to the rear end of the telescopic sleeve.

[0016] In some embodiments, the positioning assembly includes a positioning sleeve and several positioning blocks, the positioning blocks are arranged at the end of the positioning sleeve away from the telescopic sleeve and are arranged at intervals along the circumference of the positioning sleeve, the positioning sleeve is rotatably connected to the telescopic sleeve, and the cavity structure in the middle of the positioning sleeve is connected to the cavity structure inside the telescopic sleeve for accommodating the drill bit of the handheld drill.

[0017] In some embodiments, a dust collecting member is further included, one end of which is connected to the positioning assembly, and the other end is used to connect to a waste collecting member to receive debris and dust generated when the handheld drill is drilling.

[0018] In some embodiments, a pressure cover is further included that is mounted on the telescopic sleeve. The pressure cover is located at one end of the telescopic sleeve close to the positioning assembly, and the pressure cover is used to limit the positioning assembly on the telescopic sleeve.

[0019] The present invention also provides a handheld drilling device, which can improve positioning accuracy, reduce errors caused by uneven manual processing force or operational errors, and improve the processing effect and efficiency of the handheld drill.

[0020] The present invention adopts the following technical solutions:

[0021] A handheld drilling device comprises a handheld drill and a buffer bracket according to any of the above schemes, wherein the buffer bracket is sleeved and locked to the output end of the handheld drill.

[0022] Beneficial effects of the present invention:

[0023] The present invention provides a buffer bracket and a handheld drilling device. During the operation of the handheld drill, a positioning assembly is used to locate the processing surface of the workpiece to be drilled. Furthermore, because the positioning assembly is rotatably connected to a telescopic sleeve, the positioning assembly does not rotate with the handle or other structures due to vibration during manual drilling, thereby ensuring the positioning accuracy of the positioning assembly. Furthermore, by providing a telescopic sleeve and a damping buffer member connected to the telescopic sleeve, the speed stability of the handheld drill during operation is ensured, preventing problems such as tearing and burring of the workpiece during drilling. This reduces errors caused by uneven manual processing force or operational errors, thereby improving processing results and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] FIG1 is an axonometric view of a buffer bracket provided in a specific embodiment of the present invention;

[0025] FIG2 is an exploded view of a buffer bracket provided in a specific embodiment of the present invention;

[0026] FIG3 is a cross-sectional view of a buffer bracket provided in a specific embodiment of the present invention;

[0027] FIG4 is an axonometric view of a handheld drilling device according to an embodiment of the present invention.

[0028] In the figure: 10. Telescopic sleeve; 11. First sleeve; 111. Strip hole; 12. Second sleeve; 121. Mounting hole; 122. Fixing bracket; 1221. Fixing platform; 1222. Fixing seat; 13. Fastener; 20. Damping buffer; 30. Positioning assembly; 31. Positioning sleeve; 32. Positioning block; 33. Protective pad; 40. Dust collector; 50. Clamping assembly; 51. Locking sleeve; 511. Connecting platform; 52. Clamping block; 60. Pressure cap; 70. Fixing nut; 200. Handheld drill. DETAILED DESCRIPTION

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0030] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0031] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0032] In the description of this embodiment, terms such as "upper," "lower," "left," "right," "front," and "rear" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0033] This embodiment provides a buffer bracket, which is arranged at the output end of the handheld drill 200 to assist the handheld drill 200 in processing. The use of the buffer bracket ensures that when the handle and other structures rotate or shake due to vibration during the manual drilling process, the positioning component 30 will not rotate accordingly, thereby improving positioning accuracy.

[0034] Referring to Figures 1 to 3 , the buffer bracket includes a telescopic sleeve 10, a damping buffer 20, and a positioning assembly 30. The telescopic sleeve 10 is retractable and contains a cavity for the drill bit of a handheld drill 200. The rear end of the telescopic sleeve 10 is designed to be fitted over and locked onto the output end of the handheld drill 200. The damping buffer 20 is fixedly connected to one side of the telescopic sleeve 10 and is used to ensure a uniform speed for the drill bit. The positioning assembly 30 is rotatably mounted on the front end of the telescopic sleeve 10 and is used to locate the drilled object, ensuring the stability of the handheld drill 200, facilitating its operation, and preventing it from shaking during operation.

[0035] The buffer bracket of this embodiment assists the handheld drill 200 in its operation by locating the plane of the workpiece to be drilled via the positioning assembly 30. Furthermore, the rotatable connection between the positioning assembly 30 and the telescopic sleeve 10 ensures that even when the handle or other structure rotates or shakes due to vibration, the positioning assembly 30 will not rotate with it, thereby ensuring the positioning accuracy of the positioning assembly 30. Furthermore, by providing the telescopic sleeve 10 and the damping buffer 20 connected to the telescopic sleeve 10, when the handheld drill 200 is drilling, the damping buffer 20 provides a certain buffering effect when the drill bit is about to penetrate the workpiece to be drilled, ensuring smooth thrust release and consistent feed speed. This ensures speed stability during the operation of the handheld drill 200, prevents problems such as tearing and burring in the workpiece to be drilled, reduces errors caused by uneven processing force or operational errors, and improves processing results and accuracy.

[0036] In some embodiments, the buffer bracket also includes a dust collector 40, one end of which is connected to the positioning assembly 30, and the other end is used to connect to the waste collection part to receive the debris and dust generated when the handheld drill 200 is drilling, so that the handheld drill 200 will not cause debris and dust to splash when drilling, thereby improving environmental hygiene and improving personnel safety.

[0037] In some embodiments, the damping buffer member 20 is a damping buffer, which can ensure the thrust buffering stability in the axial direction of the handheld drill 200.

[0038] In some embodiments, the waste collection member may also be a dust suction structure, which can directly suck away the waste generated when the handheld drill 200 is working, thereby improving the dust suction effect.

[0039] Please continue to refer to Figures 1 to 3. In this embodiment, the telescopic sleeve 10 includes a first sleeve 11 and a second sleeve 12. The first sleeve 11 is sleeved and slidably connected to the second sleeve 12. The end of the first sleeve 11 away from the second sleeve 12 is used to be sleeved and locked to the output end of the handheld drill 200. The positioning assembly 30 is rotatably connected to the end of the second sleeve 12 away from the first sleeve 11. One end of the damping buffer 20 is connected to the first sleeve 11, and the other end is connected to the second sleeve 12; so that the telescopic sleeve 10 can be extended and retracted. When the handheld drill 200 is about to penetrate the drilled piece, the first sleeve 11 slides relative to the second sleeve 12, and the first sleeve 11 transmits the thrust to the damping buffer 20. The damping buffer 20 slows down the thrust of the first sleeve 11, thereby alleviating the thrust of the handheld drill 200, avoiding the sudden advancement of the handheld drill 200, resulting in problems such as tearing and burrs on the drilled piece.

[0040] In some embodiments, a mounting hole 121 is provided on the second sleeve 12, a fastener 13 is provided in the mounting hole 121, and a strip hole 111 is provided on the first sleeve 11 along its own axial direction, and the end of the fastener 13 extends into the strip hole 111, which can limit the relative displacement between the first sleeve 11 and the second sleeve 12.

[0041] In some other embodiments, the first sleeve 11 is provided with a mounting hole 121, and a fastener 13 is provided in the mounting hole 121. The second sleeve 12 is provided with a strip hole 111 extending along its own axial direction, and the end of the fastener 13 extends into the strip hole 111, which can limit the relative displacement between the first sleeve 11 and the second sleeve 12.

[0042] In some embodiments, a plurality of mounting holes 121 are spaced apart along the axial direction of the second sleeve 12 to increase the selectivity of the relative displacement between the first sleeve 11 and the second sleeve 12 , so as to be adaptable to drill bits and damping buffers 20 of various specifications.

[0043] In some embodiments, to achieve a locking connection between the telescopic sleeve 10 and the output end of the handheld drill 200, a clamping assembly 50 is provided at the end of the telescopic sleeve 10 away from the positioning assembly 30. The clamping assembly 50 includes a locking sleeve 51 and a clamping block 52. The damping buffer 20 is connected to one end of the telescopic sleeve 10 via the locking sleeve 51. The locking sleeve 51 is configured to be mounted on the output end of the handheld drill 200. The locking sleeve 51 has an opening, and the clamping blocks 52 are detachably connected to both sides of the opening to lock the opening. By mounting the locking sleeve 51 on the output end of the handheld drill 200 and locking both ends of the opening with the clamping blocks 52, the locking sleeve 51 is securely connected to the output end of the handheld drill 200, achieving a locking connection between the telescopic sleeve 10 and the output end of the handheld drill 200. Furthermore, the opening of the locking sleeve 51 improves the adaptability of the buffer bracket.

[0044] In some embodiments, a connecting platform 511 is provided at one end of the locking sleeve 51 away from the opening, and the damping buffer 20 is connected to the connecting platform 511 to achieve a fixed connection between one end of the damping buffer 20 and the rear end of the telescopic sleeve 10 .

[0045] In some embodiments, a through hole is provided in the connecting platform 511, one end of the damping buffer 20 is passed through the through hole, and two fixing nuts 70 are provided on the outer periphery of the damping buffer 20. The two fixing nuts 70 are tightened and abut against both sides of the connecting platform 511 to achieve a fixed connection between the damping buffer 20 and one end of the telescopic sleeve 10.

[0046] In some embodiments, a fixing bracket 122 is installed on the outer wall of the telescopic sleeve 10 adjacent to the positioning assembly 30, and the fixing bracket 122 connects the damping buffer 20 to the front of the telescopic sleeve 10; relative to the front end face of the positioning assembly 30, the front end face of the fixing bracket 122 is closer to the rear end face of the telescopic sleeve 10, that is, the front end face of the fixing bracket 122 is located behind the front end face of the positioning assembly 30. Compared with the situation where the front end face of the fixing bracket 122 coincides with the front end face of the positioning assembly 30, the setting of the present application can ensure that the relevant interference of the fixing bracket 122 is reduced when the positioning assembly 30 positions the processing surface.

[0047] In some embodiments, the fixing bracket 122 is located behind the positioning assembly 30 so that the damping buffer 20 and the positioning assembly 30 do not interfere with each other and do not affect the positioning effect of the positioning assembly 30 .

[0048] As can be seen from Figure 3, the end face of the positioning component 30 away from the handheld drill 200 is arranged parallel to the end face of the damping buffer 20 away from the handheld drill 200, which can ensure that the fixing frame 122 located at the rear will not interfere with the positioning component 30, and thus will not affect the positioning effect of the positioning component 30.

[0049] In some embodiments, the fixing frame 122 includes a fixing seat 1222 and a fixing platform 1221. The fixing seat 1222 is arranged on the outer periphery of the second sleeve 12, and the fixing platform 1221 is fixedly connected to the fixing seat 1222. The other end of the damping buffer 20 (i.e., the end away from the handheld drill 200, that is, the end connected to the second sleeve 12) is arranged on the fixing platform 1221 to achieve a fixed connection between the other end of the damping buffer 20 and the second sleeve 12.

[0050] Continuing with Figures 1 to 3 , in this embodiment, the positioning assembly 30 includes a positioning sleeve 31 and a plurality of positioning blocks 32 . The positioning blocks 32 are disposed at the end of the positioning sleeve 31 away from the telescopic sleeve 10 and are spaced circumferentially around the positioning sleeve 31 , so that the positioning blocks 32 are used to locate the workpiece to be drilled. The positioning sleeve 31 is rotatably connected to the telescopic sleeve 10 , and the cavity structure in the middle of the positioning sleeve 31 communicates with the cavity structure within the telescopic sleeve 10 to accommodate the drill bit of the handheld drill 200 . The positioning blocks 32 can locate the plane of the workpiece to be drilled, thereby ensuring the drilling accuracy of the handheld drill 200 .

[0051] In some embodiments, three positioning blocks 32 are provided, and the three positioning blocks 32 can position a plane, thereby ensuring the positioning accuracy of the positioning assembly 30 .

[0052] In some embodiments, a protective pad 33 is further provided on the positioning block 32 to protect the workpiece to be drilled, so that no indentation occurs when the positioning block 32 abuts against the plane of the workpiece to be drilled, thereby ensuring the flatness of the workpiece to be drilled.

[0053] In some embodiments, the buffer bracket further includes a gland 60 mounted on the telescopic sleeve 10 near the side of the positioning assembly 30. The gland 60 is used to retain the positioning assembly 30 on the telescopic sleeve 10. This does not affect the rotation of the positioning assembly 30 relative to the telescopic sleeve 10, thereby preventing the handle and other structures from rotating or shaking due to vibration during the drilling process, ensuring the accurate positioning of the positioning assembly 30.

[0054] In some embodiments, one end of the positioning assembly 30 close to the telescopic sleeve 10 extends radially inward and is sleeved on the outer wall of the telescopic sleeve 10, the outer ring of the pressure cover 60 extends radially outward into the positioning assembly 30, and the rear end face of the positioning assembly 30 is arranged adjacent to the fixing frame 122 on the telescopic sleeve 10, and the inner ring of the pressure cover 60 extends axially into the telescopic sleeve 10, thereby realizing the rotational connection between the positioning assembly 30 and the telescopic sleeve 10.

[0055] In some embodiments, the positioning sleeve 31 extends radially inward toward one end of the telescopic sleeve 10 to form a flange, and is sleeved on the telescopic sleeve 10, thereby limiting the radial movement of the positioning sleeve 31. The outer ring of the pressure cover 60 extends radially outward to the inner side of the flange, and the rear end face of the flange is adjacent to the fixing frame 122 on the telescopic sleeve 10, thereby limiting the axial movement of the positioning sleeve 31; the inner ring of the pressure cover 60 extends axially into the telescopic sleeve 10 and is spirally connected to the telescopic sleeve 10, so that the positioning sleeve 31 is rotatably connected to the telescopic sleeve 10, and also limits the axial position of the positioning sleeve 31.

[0056] Referring to Figure 4 , this embodiment also provides a handheld drilling device comprising a handheld drill 200 and a buffer bracket as described in any of the above-described embodiments. The buffer bracket is mounted and locked onto the output end of the handheld drill 200. During drilling, the buffer bracket is mounted and locked onto the output end of the handheld drill 200. The drill bit passes through the buffer bracket, which positions the drilled object, and then rotates to drill the object. The buffer bracket improves the positioning accuracy of the handheld drill 200, reduces errors caused by uneven force or operator error, and improves the drilling effect and efficiency of the handheld drill 200. The buffer bracket, when used with the handheld drill 200, does not require any structural modifications to the handheld drill 200; it can simply be mounted and retracted onto the output end of the handheld drill 200. Therefore, the buffer bracket is suitable for various handheld drills 200, such as pneumatic drills, electric drills, and ultrasonic handheld drills, and has a wide range of applications.

[0057] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A buffer bracket, characterized in that: include: A telescopic sleeve (10), the telescopic sleeve (10) being telescopic and having a cavity structure inside thereof for the drill bit of the handheld drill (200) to pass through, the rear end of the telescopic sleeve (10) being used to be sleeved and locked to the output end of the handheld drill (200); A damping buffer (20) is fixedly connected to one side of the telescopic sleeve (10), and the damping buffer (20) is used to make the drill bit of the handheld drill (200) move forward at a uniform speed; A positioning assembly (30) is rotatably arranged at the front end of the telescopic sleeve (10), and the positioning assembly (30) is used to position a piece to be drilled.

2. The buffer bracket according to claim 1, characterized in that: The telescopic sleeve (10) comprises a first sleeve (11) and a second sleeve (12), wherein the first sleeve (11) is sleeved and slidably connected to the second sleeve (12), and one end of the first sleeve (11) away from the second sleeve (12) is used to be sleeved and locked to the output end of the handheld drill (200), the positioning assembly (30) is rotatably connected to one end of the second sleeve (12) away from the first sleeve (11), and one end of the damping buffer (20) is connected to the first sleeve (11), and the other end is connected to the second sleeve (12).

3. The buffer bracket according to claim 2, characterized in that: The first sleeve (11) is provided with a mounting hole (121), a fastener (13) is arranged in the mounting hole (121), the second sleeve (12) is provided with a strip hole (111) extending along the axial direction of the second sleeve (12), the end of the fastener (13) extends into the strip hole (111), so as to limit the relative displacement between the first sleeve (11) and the second sleeve (12); Or the second sleeve (12) is provided with a mounting hole (121), a fastener (13) is screwed into the mounting hole (121), and the first sleeve (11) is provided with a strip hole (111) extending along its own axial direction, and the end of the fastener (13) extends into the strip hole (111) to limit the relative displacement between the first sleeve (11) and the second sleeve (12).

4. The buffer bracket according to claim 1, characterized in that: A fixing frame (122) is installed on the outer wall of the telescopic sleeve (10) adjacent to the positioning assembly (30), and the fixing frame (122) connects the damping buffer component (20) to the front part of the telescopic sleeve (10); relative to the front end face of the positioning assembly (30), the front end face of the fixing frame (122) is closer to the rear end face of the telescopic sleeve (10).

5. The buffer bracket according to claim 1, characterized in that: A clamping assembly (50) is provided at the rear end of the telescopic sleeve (10), and the clamping assembly (50) comprises a locking sleeve (51) and a clamping block (52). The damping buffer (20) is connected to the rear end of the telescopic sleeve (10) through the locking sleeve (51), and the locking sleeve (51) is used to be sleeved on the output end of the hand-held drill (200). The locking sleeve (51) is provided with an opening, and the clamping block (52) is detachably connected to both sides of the opening to lock the opening.

6. The buffer bracket according to claim 5, characterized in that: A connecting platform (511) is provided at one end of the locking sleeve (51) away from the opening so as to connect the damping buffer component (20) to the rear end of the telescopic sleeve (10).

7. The buffer bracket according to claim 1, characterized in that: The positioning assembly (30) comprises a positioning sleeve (31) and a plurality of positioning blocks (32); the positioning blocks (32) are arranged at the end of the positioning sleeve (31) away from the telescopic sleeve (10) and are arranged at intervals along the circumference of the positioning sleeve (31); the positioning sleeve (31) is rotatably connected to the telescopic sleeve (10); a cavity structure in the middle of the positioning sleeve (31) is connected to a cavity structure inside the telescopic sleeve (10) for accommodating a drill bit of the handheld drill (200).

8. The buffer bracket according to any one of claims 1 to 7, characterized in that: It also includes a dust collecting member (40), one end of which is connected to the positioning assembly (30), and the other end of which is connected to a waste collecting member to receive debris and dust generated when the handheld drill (200) is drilling.

9. The buffer bracket according to any one of claims 1 to 7, characterized in that: It also includes a pressure cover (60) installed on the telescopic sleeve (10), the pressure cover (60) is located at one end of the telescopic sleeve (10) close to the positioning assembly (30), and the pressure cover (60) is used to limit the positioning assembly (30) on the telescopic sleeve (10).

10. A handheld drilling device, characterized in that: It comprises a handheld drill (200) and a buffer bracket as claimed in any one of claims 1 to 9, wherein the buffer bracket is sleeved and locked to the output end of the handheld drill (200).

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