Handheld pneumatic percussion drill

Abstract

The utility model discloses a handheld pneumatic percussion drill, and belongs to the field of handheld pneumatic percussion drills. The handheld pneumatic percussion drill comprises a main body, and a protection mechanism is arranged at the end, close to a drill bit, of the main body; the protection mechanism comprises an upper lantern ring fixedly connected to the side face of the end, close to the drill bit, of the main body, a rubber corrugated sleeve arranged outside the end, close to the drill bit, of the main body in a sleeving mode, and a lower lantern ring arranged outside the drill bit in a sleeving mode and used for making contact with a target object. The two ends of the rubber corrugated sleeve are fixedly installed with the upper lantern ring and the lower lantern ring respectively, and the sides, close to each other, of the upper lantern ring and the lower lantern ring are each provided with an annular inserting groove for containing the end of the rubber corrugated sleeve. According to the handheld pneumatic percussion drill, due to the damping characteristic of the rubber corrugated sleeve, high-frequency vibration can be attenuated, noise is lowered, the splashing range is limited around a drilling point in cooperation with the lower lantern ring, safety is improved, and dependence on goggles and safety clothes is reduced.

Description

Technical Field

[0001] This application relates to the field of handheld pneumatic impact drill technology, specifically a handheld pneumatic impact drill. Background Technology

[0002] A handheld pneumatic impact drill is a portable drilling tool that uses compressed air to drive the drilling process. It combines rotational motion and impact force and is specifically designed for efficient drilling into hard materials such as concrete, brick, and metal.

[0003] Existing common handheld pneumatic impact drills use high-pressure gas supplied by an air compressor to drive an internal pneumatic motor or piston mechanism to generate power. As the drill bit rotates, the internal mechanical structure, such as the impact hammer, generates axial high-frequency impacts, enhancing the ability to penetrate hard materials.

[0004] However, when using a pneumatic impact drill, the internal mechanical structure such as the impact hammer generates a lot of noise, and because the impact energy is greater, the impact debris can easily injure workers, so it is necessary to wear external protection such as goggles and safety clothing.

[0005] Therefore, this application provides a handheld pneumatic impact drill to solve the above problems. Utility Model Content

[0006] This application provides a handheld pneumatic impact drill, which aims to solve the problems of high noise and lack of safety protection structure in existing handheld pneumatic impact drills mentioned in the background art.

[0007] To achieve the above objectives, this application provides the following technical solution: a handheld pneumatic impact drill, comprising a main body, wherein a protective mechanism is provided at one end of the main body near the drill bit. The protective mechanism includes an upper collar fixedly connected to the side of the main body near the drill bit, a rubber corrugated sleeve fitted on the outside of the main body near the drill bit, and a lower collar fitted on the outside of the drill bit for contact with the target object. The two ends of the rubber corrugated sleeve are respectively installed and fixed to the upper collar and the lower collar. In this way, the damping characteristics of the rubber corrugated sleeve can attenuate high-frequency vibrations and reduce noise. Combined with the lower collar, the splash range is limited to around the drilling point, improving safety and reducing reliance on goggles and safety clothing.

[0008] Preferably, the upper collar and the lower collar are provided with annular slots on their respective sides to accommodate the end of the rubber corrugated sleeve. The upper collar has at least three first pin holes on its side that extend into the annular slots and are arranged in a ring array. Each of the first pin holes is screwed with at least three first pins arranged in a ring array that abut against the side of the end of the rubber corrugated sleeve.

[0009] Preferably, the lower sleeve has at least three second pin holes on its side that extend into the annular slot and are arranged in a ring array. Each of the second pin holes is screwed with at least three second pins arranged in a ring array that abut against the side of the end of the rubber corrugated sleeve.

[0010] Preferably, the lower collar has an annular flange at the end near the target object, and the annular flange has a plurality of mounting holes arranged in a circular array to accommodate the passage of bolts.

[0011] Preferably, at least three tension springs arranged in a ring array outside the rubber corrugated sleeve are connected between the upper collar and the lower collar.

[0012] Preferably, the upper collar and the lower collar are respectively provided with at least three first hanging holes and second hanging holes arranged in a ring array to accommodate the end of the tension spring.

[0013] This handheld pneumatic impact drill features a rubber corrugated sleeve that dampens high-frequency vibrations and reduces noise. Combined with the lower collar, it limits the splash range to around the drilling point, improving safety and reducing the need for goggles and safety clothing.

[0014] This handheld pneumatic impact drill uses a ring spring system to evenly distribute the recoil load, preventing stress concentration at a single point on the operator's hand, significantly reducing the risk of muscle fatigue. Furthermore, by adjusting the spring stiffness, such as by replacing the spring with one of different wire diameters, it can be adapted to the impact feedback of targets made of different materials. Attached Figure Description

[0015] Figure 1 A schematic diagram of a handheld pneumatic impact drill;

[0016] Figure 2 This is a schematic diagram of the exploded structure of a handheld pneumatic impact drill.

[0017] In the picture:

[0018] 1. Main body;

[0019] 2. Protective equipment;

[0020] 21. Upper collar; 211. First pin hole; 212. First pin; 213. First hanging hole;

[0021] 22. Rubber corrugated sleeve;

[0022] 23. Lower collar; 231. Second pin hole; 232. Second pin; 233. Second hanging hole; 234. Annular slot; 235. Annular flange; 2351. Mounting hole;

[0023] 24. Tension spring. Detailed Implementation

[0024] The technical solutions of 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 of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] Example 1

[0026] This embodiment provides a handheld pneumatic impact drill, such as Figures 1-2 As shown, the handheld pneumatic impact drill includes a main body 1. A protective mechanism 2 is provided at one end of the main body 1 near the drill bit. The protective mechanism 2 includes an upper collar 21 fixedly connected to the side of the main body 1 near the drill bit, a rubber corrugated sleeve 22 fitted on the outside of the main body 1 near the drill bit, and a lower collar 23 fitted on the outside of the drill bit for contact with the target object. The two ends of the rubber corrugated sleeve 22 are respectively installed and fixed to the upper collar 21 and the lower collar 23.

[0027] When in use, compressed air enters the main body 1, and the impact hammer begins to strike at high frequency. The rubber corrugated sleeve 22 undergoes elastic deformation with the vibration of the main body, absorbing part of the impact energy and reducing noise. The lower collar 23 is in close contact with the surface of the target object, forming a local closed space. The debris is confined between the collar and the bottom of the hole and the corrugated sleeve, thereby preventing flying debris from injuring people.

[0028] Specifically, both the upper collar 21 and the lower collar 23 have annular slots 234 on their adjacent sides to accommodate the end of the rubber corrugated sleeve 22. The upper collar 21 has at least three first pin holes 211 extending into the annular slots 234 and arranged in a circular array on its side. Each of the first pin holes 211 is screwed with at least three first pins 212 arranged in a circular array that abut against the side of the end of the rubber corrugated sleeve 22. The lower collar 23 has at least three second pin holes 231 extending into the annular slots 234 and arranged in a circular array on its side. Each of the second pin holes 231 is screwed with... There are at least three second pins 232 arranged in a ring array that abut against the side of the end of the rubber corrugated sleeve 22; the upper and lower ends of the rubber corrugated sleeve 22 are respectively inserted into the annular slots 234 of the upper collar 21 and the lower collar 23 to form preliminary axial positioning; the first pin 212 is screwed in through the first pin hole 211 of the annular array to press the end of the rubber sleeve radially to prevent it from moving axially; the second pin 232 is screwed in through the second pin hole 231 of the annular array to press the other end of the rubber sleeve radially, thus completing the installation and fixing, which is convenient for quick disassembly and assembly, and thus convenient for maintenance and replacement.

[0029] Furthermore, the lower collar 23 has an annular flange 235 at the end near the target object, and the annular flange 235 has a plurality of mounting holes 2351 arranged in a ring array to allow bolts to pass through; the mounting holes 2351 allow the annular flange 235 to be fixed to the surface of the target object by bolts, further forming a seal and preventing debris from splashing.

[0030] Example 2

[0031] Unlike Embodiment 1, the handheld pneumatic impact drill generates a large amplitude during operation, which produces a large recoil force on the user. Once the operator is exhausted, they are easily bounced off and injured. To address this, at least three tension springs 24 arranged in a ring array outside the rubber corrugated sleeve 22 are connected between the upper collar 21 and the lower collar 23. The upper collar 21 and the lower collar 23 are respectively provided with at least three first hanging holes 213 and second hanging holes 233 arranged in a ring array to accommodate the ends of the tension springs 24.

[0032] Three or more tension springs 24 are arranged in a ring at equal angles to ensure synchronous suppression of vibrations in the drilling direction and the recoil direction. When the impact hammer generates high-frequency impact, the main body 1 vibrates axially, causing the upper collar 21 and the lower collar 23 to have a relative displacement tendency. The tension springs 24 are stretched / compressed, converting some mechanical energy into elastic potential energy for storage, weakening the vibration amplitude. The spring damping characteristics further dissipate residual vibration energy and shorten the vibration decay period. The ring spring system evenly distributes the recoil load, avoiding stress concentration at a certain point on the operator's hand, and significantly reducing the risk of muscle fatigue. By adjusting the spring stiffness, such as by replacing springs with springs of different wire diameters, the impact feedback of targets of different materials can be adapted.

[0033] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and concept of this application, should be included within the scope of protection of this application.

Claims

1. A hand-held pneumatic impact drill comprising a main body (1), characterized in that: The main body (1) is provided with a protective mechanism (2) at one end near the drill bit. The protective mechanism (2) includes an upper collar (21) fixedly connected to the side of the main body (1) near the drill bit, a rubber corrugated sleeve (22) fitted on the outside of the main body (1) near the drill bit, and a lower collar (23) fitted on the outside of the drill bit for contact with the target object. The two ends of the rubber corrugated sleeve (22) are respectively installed and fixed to the upper collar (21) and the lower collar (23).

2. The hand-held pneumatic percussion drill according to claim 1, characterized in that: The upper collar (21) and the lower collar (23) are each provided with an annular slot (234) on one side close to each other to accommodate the end of the rubber corrugated sleeve (22). The upper collar (21) is provided with at least three first pin holes (211) extending into the annular slot (234) and arranged in a ring array on the side. Each of the first pin holes (211) is screwed with at least three first pins (212) arranged in a ring array that abut against the side of the end of the rubber corrugated sleeve (22).

3. The hand-held pneumatic percussion drill according to claim 2, characterized in that: The lower collar (23) has at least three second pin holes (231) on its side that extend into the annular slot (234) and are arranged in a ring array. Each of the second pin holes (231) is screwed with at least three second pins (232) arranged in a ring array that abut against the side of the end of the rubber corrugated sleeve (22).

4. The handheld pneumatic impact drill according to claim 3, characterized in that: The lower collar (23) has an annular flange (235) at the end near the target object, and the annular flange (235) has a plurality of mounting holes (2351) arranged in an annular array to accommodate the passage of bolts.

5. The hand-held pneumatic percussion drill according to claim 4, characterized in that: At least three tension springs (24) arranged in a ring array outside the rubber corrugated sleeve (22) are connected between the upper collar (21) and the lower collar (23).

6. The hand-held pneumatic percussion drill according to claim 5, characterized in that: The upper collar (21) and the lower collar (23) are respectively provided with at least three first hanging holes (213) and second hanging holes (233) arranged in a ring array to accommodate the end of the tension spring (24).

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