Square-shank electric hammer drill bit

Abstract

The utility model relates to the technical field of square-handle drill bits, and discloses a square-handle electric hammer drill bit which comprises a square-handle rod and an electric hammer head, the square-handle rod and the electric hammer head are connected through threads, a scrap removing assembly is arranged in the electric hammer head and comprises a connecting base and a sleeve, the connecting base and the electric hammer head are connected through threads, the connecting base is arranged in the electric hammer head, and the sleeve is sleeved with the connecting base. The connecting base and the sleeve are connected through a reset spring, kidney-shaped holes are formed in the side face of the sleeve at intervals in the center line direction of the sleeve and communicate with the interior of the sleeve, a spiral groove is formed in the electric hammer head, and ventilation holes are formed in the inner side of the spiral groove at intervals. Driving force generated in the drilling process of the electric hammer is utilized, so that the scrap removing assembly can blow air to the spiral groove of the drill bit from inside to outside, scrap iron can be discharged from the spiral groove more conveniently, and the situation that the drilling efficiency is not high due to the fact that scraps are not discharged in time due to blocking of the scraps is avoided; and the drilling speed of the electric hammer drill bit is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of drill bits, in particular to a square-shank electric hammer drill bit. Background Art

[0002] The electric hammer drill is a handheld electric tool that combines the functions of an impact drill and an electric hammer. The main function is rotary cutting, and the impact mechanism drives the impact drill bit. Square shank drill bits are one of them. Square shank drill bits are one of the most common types of drill bits, and the shape of the drill bit shank is square or hexagonal. Square shank drill bits are suitable for drilling with square shank drills (such as electric drills) or hand tools (such as wrenches, wrench hubs, etc.). Square shank drill bits are usually used for drilling materials such as wood, metal and plastic.

[0003] During the use of the drill bit, due to its low chip removal efficiency, the cut chips cannot be discharged as quickly as possible in a short time. Although the chips can be removed by the rotation of the spiral chip removal groove, the chips are blocked (especially when the drill bit drills vertically downward), and the chips are not discharged in time, resulting in low drilling efficiency. In view of this, we propose a square handle electric hammer drill bit. Utility Model Content

[0004] The utility model aims to provide a square-shank electric hammer drill to solve the problem of low drilling efficiency caused by the blocking of debris (especially when the drill drill is drilling vertically downward) caused by the existing electric hammer drill mentioned in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a square-handled electric hammer drill, comprising a square-handled rod and an electric hammer head, the square-handled rod and the electric hammer head are connected by threads, a chip removing component is arranged inside the electric hammer head, the chip removing component comprises a connecting seat and a sleeve, the connecting seat and the electric hammer head are connected by threads, and the connecting seat is arranged inside the electric hammer head, the connecting seat and the sleeve are connected by a reset spring, waist-shaped holes are arranged at intervals on the side surface of the sleeve along the center line direction of the sleeve, the waist-shaped holes are connected to the inside of the sleeve, a spiral groove is arranged on the electric hammer head, and ventilation holes are arranged at intervals on the inner side of the spiral groove.

[0006] Preferably, the center of the square handle rod and the electric hammer head are collinear.

[0007] Preferably, the width of the waist-shaped hole is equal to the diameter of the ventilation hole, and the length of the waist-shaped hole is longer than the diameter of the ventilation hole.

[0008] Preferably, the outer side surface of the sleeve and the inner side surface of the electric hammer head are in contact with each other, and the spacing between the waist-shaped holes is equal to the spacing between the ventilation holes.

[0009] Preferably, the ventilation hole is connected to the interior of the sleeve, and the ventilation hole and the waist-shaped hole have corresponding inner and outer positions.

[0010] Preferably, the return spring and the sleeve are both arranged inside the electric hammer head, and the return spring and the sleeve are both colinear with the center of the electric hammer head.

[0011] Preferably, the pitch of the spiral groove is equal to the spacing of the ventilation holes.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. For this type of square-handled electric hammer drill, when the electric hammer drives the electric hammer head to work, the chip removal component arranged inside the electric hammer head can cause the reset spring to produce different compressions through the action of centrifugal force at different electric hammer speeds, thereby causing the sleeve to move upward or downward along the center line direction inside the electric hammer head; thereby causing the ventilation holes on the sleeve and the waist-shaped holes of the electric hammer head to overlap alternately. When the ventilation holes on the sleeve and the waist-shaped holes of the electric hammer head overlap, the wind generated by the movement of the sleeve inside the electric hammer head can be discharged through the connected ventilation holes and waist-shaped holes, thereby causing the iron chips inside the spiral groove on the electric hammer head to quickly detach from the spiral groove, making it easier to clean the iron chips. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 It is a schematic diagram of a half-section structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the square handle rod structure of the utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the electric hammer head of the utility model;

[0018] Figure 5 It is a schematic diagram of the chip removal component of the utility model.

[0019] In the figure: 1, square handle rod; 2, electric hammer head; 21, spiral groove; 3, ventilation hole; 4, chip removal component; 41, connecting seat; 42, reset spring; 43, sleeve; 44, waist-shaped hole. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Example: See Figure 1-5 The utility model provides a technical solution: a square handle electric hammer drill, which is mainly aimed at improving the problem of low drilling efficiency caused by the blocking of debris (especially when the drill is drilling vertically downward) and the untimely discharge of debris in the existing electric hammer drill during use. The specific scheme is as follows: it includes a square handle rod 1 and an electric hammer head 2, and the centers of the square handle rod 1 and the electric hammer head 2 are collinear. The square handle rod 1 and the electric hammer head 2 are connected by threads. When the square handle rod 1 and the electric hammer head 2 are connected by threads, the electric hammer head 2 can be directly replaced after the drill bit is worn during use, without the need to replace other parts, thereby reducing the cost of use.

[0022] See also Figure 2 and Figure 5 Among them, a chip removal component 4 is provided inside the electric hammer head 2, and the chip removal component 4 can clean the iron chips generated during the use of the electric hammer head 2, so that the iron chips can fall from the spiral groove 21 of the electric hammer head 2 more easily.

[0023] Specifically, the chip removing component 4 includes a connecting seat 41 and a sleeve 43. The connecting seat 41 and the electric hammer head 2 are connected by threads, and the connecting seat 41 is arranged inside the electric hammer head 2. Through the setting of the connecting seat 41, it can play a supporting role for the chip removing component 4, and the connecting seat 41 is fixed on the electric hammer head 2 by threads, which can facilitate the installation and disassembly of the chip removing component 4.

[0024] Furthermore, the connection seat 41 and the sleeve 43 are connected by a reset spring 42, and the reset spring 42 and the sleeve 43 are both arranged inside the electric hammer head 2, and the reset spring 42 and the sleeve 43 are both colinear with the center of the electric hammer head 2. Through the arrangement of the reset spring 42, when the electric hammer is working, the electric hammer head 2 drives the chip removal component 4 inside it to rotate, and through the effect of the centrifugal force under different electric hammer speeds, at this time, the reset spring 42 can be compressed differently, so that the sleeve 43 can move upward or downward along the center line direction inside the electric hammer head 2.

[0025] It is worth noting that, during the drilling operation, the drilling speed of the electric hammer can be continuously adjusted, and the reset spring 42 can be compressed and reset to different degrees through the action of centrifugal force.

[0026] Furthermore, waist-shaped holes 44 are arranged at intervals on the side of the sleeve 43 along the center line direction of the sleeve 43, and the electric hammer head 2 is provided with a spiral groove 21, and the pitch of the spiral groove 21 is equal to the pitch of the ventilation holes 3. Ventilation holes 3 are arranged at intervals inside the spiral groove 21. The width of the waist-shaped hole 44 is equal to the diameter of the ventilation hole 3, and the length of the waist-shaped hole 44 is longer than the diameter of the ventilation hole 3. In the above, by continuously adjusting the drilling speed of the electric hammer, the reset spring 42 can produce different degrees of compression and reset through the action of centrifugal force. At this time, the sleeve 43 can move along the center line direction inside the electric hammer head 2, so that the ventilation holes 3 on the sleeve 43 and the waist-shaped holes 44 of the electric hammer head 2 are alternately overlapped. When the ventilation holes 3 on the sleeve 43 and the waist-shaped holes 44 of the electric hammer head 2 overlap, the wind generated by the movement of the sleeve 43 inside the electric hammer head 2 can be discharged through the connected ventilation holes 3 and waist-shaped holes 44, so that the iron filings inside the spiral groove 21 on the electric hammer head 2 can be quickly detached from the spiral groove 21, which is more convenient for cleaning the iron filings.

[0027] Among them, the reset spring 42 is a consumable part. During use, if the reset spring 42 loses its own function, the electric hammer head 2 and the square handle rod 1 can be separated, and the connecting seat 41 can be rotated so that the entire chip removal assembly 4 can be taken out from the inside of the electric hammer head 2, and the reset spring 42 can be replaced, which further ensures the iron chip removal effect of the chip removal assembly 4.

[0028] Furthermore, the waist-shaped hole 44 is connected to the inside of the sleeve 43, the outer side of the sleeve 43 fits the inner side of the electric hammer head 2, and the spacing of the waist-shaped holes 44 is equal to the spacing of the ventilation holes 3. The ventilation holes 3 are connected to the inside of the sleeve 43, and the inner and outer positions of the ventilation holes 3 and the waist-shaped holes 44 correspond.

[0029] When the square-handled electric hammer drill is used, the square-handled rod 1 and the electric hammer head 2 are connected by threads, and the handle fixes the connected square-handled rod 1 on the output shaft of the electric hammer. When the electric hammer is working, the square-handled rod 1 and the electric hammer head 2 can be driven to rotate. During the rotation of the electric hammer head 2, the chip removal component 4 arranged inside the electric hammer head 2 rotates, and the electric hammer head 2 rotates, driving the chip removal component 4 inside it to rotate. Through the action of centrifugal force under different electric hammer speeds, the reset spring 42 can be compressed differently at this time, so that the sleeve 43 is rotated. The inside of the electric hammer head 2 generates an upward or downward movement along the center line direction; thereby, the ventilation holes 3 on the sleeve 43 and the waist-shaped holes 44 of the electric hammer head 2 are alternately overlapped. When the ventilation holes 3 on the sleeve 43 and the waist-shaped holes 44 of the electric hammer head 2 overlap, the wind generated by the movement of the sleeve 43 inside the electric hammer head 2 can be discharged through the connected ventilation holes 3 and waist-shaped holes 44, thereby allowing the iron filings inside the spiral groove 21 on the electric hammer head 2 to quickly detach from the spiral groove 21, making it easier to clean the iron filings.

[0030] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A square-shank electric hammer drill, comprising a square-shank rod (1) and an electric hammer head (2), characterized in that: The square handle rod (1) and the electric hammer head (2) are connected by threads, a chip removal assembly (4) is provided inside the electric hammer head (2), and the chip removal assembly (4) comprises a connecting seat (41) and a sleeve (43), the connecting seat (41) and the electric hammer head (2) are connected by threads, and the connecting seat (41) is provided inside the electric hammer head (2), the connecting seat (41) and the sleeve (43) are connected by a return spring (42), waist-shaped holes (44) are provided at intervals on the side surface of the sleeve (43) along the center line direction of the sleeve (43), and the waist-shaped holes (44) are connected to the inside of the sleeve (43), and the electric hammer head (2) is provided with a spiral groove (21), and ventilation holes (3) are provided at intervals inside the spiral groove (21).

2. A square handle electric hammer drill according to claim 1, characterized in that: The centers of the square handle rod (1) and the electric hammer head (2) are collinear.

3. A square handle electric hammer drill according to claim 1, characterized in that: The width of the waist-shaped hole (44) is equal to the diameter of the ventilation hole (3), and the length of the waist-shaped hole (44) is longer than the diameter of the ventilation hole (3).

4. A square handle electric hammer drill according to claim 1, characterized in that: The outer side surface of the sleeve (43) fits the inner side surface of the electric hammer head (2), and the spacing of the waist-shaped holes (44) is equal to the spacing of the ventilation holes (3).

5. The square-shank electric hammer drill according to claim 1, characterized in that: The ventilation hole (3) is connected to the interior of the sleeve (43), and the ventilation hole (3) and the waist-shaped hole (44) correspond in internal and external positions.

6. A square handle electric hammer drill according to claim 1, characterized in that: The return spring (42) and the sleeve (43) are both arranged inside the electric hammer head (2), and the return spring (42) and the sleeve (43) are both colinear with the center of the electric hammer head (2).

7. A square handle electric hammer drill according to claim 1, characterized in that: The pitch of the spiral groove (21) is equal to the pitch of the ventilation holes (3).

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