Drill bit of round-handle electric hammer

Abstract

The utility model relates to the technical field of electric hammer drill bits, and discloses a round handle electric hammer drill bit which comprises a hollow long cylinder, a groove is formed in the top of the hollow long cylinder, a plurality of sawteeth are fixedly connected to the left side of the inner wall of the groove at equal intervals, and an outer tooth groove plate is slidably connected to the interior of the groove. A square short plate is rotatably connected to the front side of the outer wall of the outer tooth groove plate, a fixing circular ring is fixedly connected to the front side of the outer wall of the square short plate, a plurality of springs are fixedly connected to the front side of the outer wall of the fixing circular ring at equal intervals, and a fixing ring is fixedly connected to the other ends of the springs. According to the electric drill, the outer tooth groove plate slides to move to the front side, force is transmitted to the outer tooth groove plate through the spring to absorb and release the force, and therefore the situation that after the arm of a worker is subjected to vibration impact force generated when the electric drill drills holes for a long time, the hand of the worker is fatigued, and the hand holding the electric drill loses control over a drill bit is avoided; and serious safety accidents are caused.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric hammer drill bit technical field especially relates to a round handle electric hammer drill bit. BACKGROUND

[0002] The round handle electric hammer drill bit is a kind of drilling cutter specially used on electric tool, its main function is under the driving of electric hammer, through rotation and impact movement, hole is drilled on various building materials such as concrete, masonry and rock and part metal material, realizes drilling operation.

[0003] Through the retrieval, China patent publication No. CN109676807A discloses an electric hammer drill bit, relating to drill bit field, including drill body, drill handle, drill cutter, the rear end of drill body is connected with drill handle, drill cutter is arranged at the front end of drill body, the surface of drill body is equipped with chip removal groove, drill body forms corresponding blade along chip removal groove, the groove depth of chip removal groove gradually becomes shallow from the distance outlet end edge 3 centimeters to outlet end edge, and the included angle between blade and drill body center axis is 135±10 °;Drill body front end is equipped with base, drill cutter is welded on base, the center of drill cutter is equipped with arc-shaped groove, and anti-impact head made of hard alloy is fixedly connected in arc-shaped groove, and anti-impact head protrudes from the front end surface of drill cutter;The connecting place of drill handle and drill body is equipped with protective cover;Drill handle circumferential surface is equipped with symmetrical and evenly distributed limiting groove and spline groove.The invention can prevent chip removal groove outlet from breaking, protect drill cutter through anti-impact head, avoid dust and dirt splashing through protective cover, have strong fatigue resistance, high mechanical strength, safe operation, but staff in long time operation drilling, since drill head will produce strong vibration impact force when drilling, will make the arm of staff appear fatigue makes the originally tightly held electric drill hand lose the control of drill head, if drill head suddenly deviates from drilling position under the condition of high-speed rotation, will cause harm to the body of staff and damage surrounding equipment, material and cause more serious safety accidents, thereby causing influence to subsequent work. UTILITY MODEL CONTENTS

[0004] In order to make up for the above shortcomings, the utility model provides a kind of round handle electric hammer drill bit, aims at improving the hand fatigue of staff's arm in long time received electric drill drilling vibration impact force in prior art, makes the originally tightly held electric drill hand lose the control of drill head, and causes serious safety accident problem.

[0005] In order to achieve the above object, the utility model discloses the following technical scheme: a round handle electric hammer drill bit, including hollow long tube, the top of hollow long tube is provided with recess, the inner wall left side of recess is fixedly connected with a plurality of saw teeth at equal intervals, the inside sliding connection of recess has outer tooth groove board, the outer wall front side of outer tooth groove board is rotatably connected with square short plate, the outer wall front side of square short plate is fixedly connected with fixed ring, the outer wall front side of fixed ring is fixedly connected with a plurality of springs at equal intervals, the other end of spring is fixedly connected with fixed ring, the outer wall rear side of hollow long tube is fixedly connected with clamping block, the outer wall left side of clamping block is rotatably connected with buckle, the inside of hollow long tube is provided with drill bit.

[0006] Through the above technical scheme: by the clamping block of hollow long tube outer wall rear side is covered on electric drill, then rotates the buckle of clamping block outer wall left side and fixes hollow long tube on electric drill, then by hand sliding the outer tooth groove board of hollow long tube top recess inside, by the tooth groove of outer tooth groove board outside and the saw tooth of recess inner wall left side are engaged and move to the front side, again by rotating square short plate, the front side fixed ring 11 is rotated to the front side, finally drill bit starts work when drill bit along with the depth of the hole becomes deep, the impact force generated will be transmitted through the fixed ring, the spring of rear side, when the spring is impacted, the force is transmitted to the outer tooth groove board, and because the inner wall of the recess is not provided with saw teeth on one side, the outer tooth groove board will gradually retreat to the left side of the inner wall of the recess along the impact force, and the impact force is absorbed.

[0007] As a further description of the above technical scheme:

[0008] The outer wall left side of the hollow long tube is fixedly connected with a hollow box, and the inside of the hollow box is slidably connected with a drawer.

[0009] Through the above technical scheme: when the drill bit of different size and shape needs to be replaced, the hollow box on the outer wall left side of the hollow long tube can be pulled, and the inside drawer can quickly replace and use the standby drill bit.

[0010] As a further description of the above technical scheme:

[0011] The top of the drawer is fixedly connected with a handle, and the outer wall of the handle is fixedly connected with an anti-skid sleeve.

[0012] Through the above technical scheme: the anti-skid sleeve of the handle outer wall of the top of the drawer can increase the gripping stability of the staff when opening and closing the drawer, and the anti-skid sleeve can prevent accidents caused by hand slipping, so that the operator can easily open and close the drawer, thereby greatly improving the convenience and safety of the drawer.

[0013] As a further description of the above technical scheme:

[0014] The outer wall of the fixed ring is threadedly connected with a screw one, and the outer wall of the screw one is threadedly connected with an anti-skid pad.

[0015] Through the above technical scheme, the anti-skid pad on the front side of the outer wall of the fixed ring can increase the contact area of the fixed ring and the drilled object, so that the sliding phenomenon caused by insufficient contact area during drilling can be effectively avoided, thereby improving the stability and safety of drilling.

[0016] The utility model has the advantages of the following:

[0017] 1、The utility model discloses a fixed circular ring is rotated to the front side, finally the power is transmitted to the outer tooth groove board through the spring, and because the inner wall of the groove is sawtoothless, so the outer tooth groove board will gradually retreat to the rear along the sawtooth of the left side of the inner wall of the groove and absorb the impact force, thereby avoiding the problem that the hand loses the control of the drill bit and causes serious safety accidents due to the fatigue of the hand after the vibration impact force of the arm of the staff during long-time electric drill drilling.

[0018] 2、The utility model discloses a hollow long tube, and the inside pull -out box replaces the standby drill head quickly, thereby avoiding the problem that the subsequent drilling work is affected due to forgetting to carry the drill head when needing to replace different drill heads. DRAWINGS

[0019] Figure 1 A perspective view of a round handle electric hammer drill bit is provided for the utility model;

[0020] Figure 2 A side view of a round handle electric hammer drill bit is provided for the utility model;

[0021] Figure 3 A partial structure schematic view of a round handle electric hammer drill bit is provided for the utility model.

[0022] LEGEND:

[0023] 1, hollow long tube;2, sawtooth;3, handle;4, pull -out box;5, hollow box;6, square short plate;7, screw one;8, anti -skid pad;9, drill bit;10, spring;11, fixed circular ring;12, anti -skid cover;13, clamping block;14, buckle;15, fixed ring;16, outer tooth groove board;17, recess. CONCRETE IMPLEMENTATION

[0024] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application.

[0025] With reference to Figure 1 , Figure 2 and Figure 3 , the present application provides an embodiment: a round handle electric hammer drill bit, comprising a hollow long barrel 1, the top of the hollow long barrel 1 is provided with a groove 17, the inner wall of the groove 17 is fixedly connected with a plurality of sawtooth 2 on the left side at equal intervals to play a fixed clamping role, the inside of the groove 17 is slidingly connected with an external tooth groove plate 16 to play a sliding adjustment role, the outer wall of the external tooth groove plate 16 is rotatably connected with a square short plate 6 on the front side, the outer wall of the square short plate 6 is fixedly connected with a fixed ring 11 on the front side to play a fixed role, the outer wall of the fixed ring 11 is fixedly connected with a plurality of springs 10 on the front side at equal intervals to play a role of buffering and reducing impact force, the other end of the spring 10 is fixedly connected with a fixed ring 15, the outer wall of the rear side of the hollow long barrel 1 is fixedly connected with a clamping block 13, the outer wall of the left side of the clamping block 13 is rotatably connected with a buckle 14, the hollow long barrel 1 can be fixed on the electric drill gun through the clamping block 13 and the buckle 14, the inner wall of the middle part of the hollow long barrel 1 is provided with a drill bit 9, the top of the drawer box 4 is fixedly connected with a handle 3, the anti-skid sleeve 12 of the outer wall of the handle 3 on the top of the drawer box 4 can increase the gripping stability of the staff when opening and closing the drawer box 4, the anti-skid sleeve 12 can prevent accidents caused by hand slipping, so that the operator can easily open and close the drawer box 4, thereby greatly improving the convenience and safety of the use of the drawer box 4;

[0026] Specifically, by sleeving the clamping block 13 on the rear side of the outer wall of the hollow long barrel 1 on the electric drill, then rotating the buckle 14 on the left side of the outer wall of the clamping block 13 to fix the hollow long barrel 1 on the electric drill, then manually sliding the outer tooth groove plate 16 in the top groove 17 of the hollow long barrel 1, and moving to the front side by the tooth groove outside the outer tooth groove plate 16 and the sawtooth 2 on the left side of the inner wall of the groove 17, then rotating the square short plate 6 to rotate the front side fixing ring 11 to the front side, and finally the drill bit 9 starts to work. When the drill bit 9 becomes deeper with the depth of the drilling, the impact force generated will be transmitted to the rear spring 10 through the fixing ring 15. When the spring 10 is impacted, it will transmit the force to the outer tooth groove plate 16. Because one side of the inner wall of the groove 17 is without the sawtooth 2, the outer tooth groove plate 16 will gradually retreat backward along the sawtooth 2 on the left side of the inner wall of the groove 17 to absorb the impact force. The top of the drawer 4 is fixedly connected with the handle 3, and the outer wall of the handle 3 is fixedly connected with the anti-skid sleeve 12. The anti-skid sleeve 12 on the outer wall of the handle 3 at the top of the drawer 4 can increase the gripping stability of the staff when opening and closing the drawer 4, and the anti-skid sleeve 12 can prevent accidents caused by hand slipping, so that the operator can easily open and close the drawer 4, thereby greatly improving the convenience and safety of the use of the drawer 4.

[0027] With reference to Figure 1 and Figure 2 , the outer wall of the hollow long barrel 1 is fixedly connected with the hollow box 5, and the hollow box 5 is slidably connected with the drawer 4. When it is necessary to replace the drill bit 9 of different sizes and shapes, the hollow box 5 on the left side of the outer wall of the hollow long barrel 1 can be pulled to quickly replace and use the standby drill bit 9 in the drawer 4;

[0028] Specifically, when drilling, if it is necessary to replace the drill bit 9 of different sizes or shapes, the drawer 4 in the hollow box 5 on the left side of the outer wall of the hollow long barrel 1 can be pulled to take out the required standby drill bit 9 and install it on the electric drill, thereby reducing the long process of replacing the drill bit 9, improving the work efficiency and avoiding the influence of forgetting to carry the required drill bit 9 when replacing the drill bit 9 on the subsequent drilling work, causing the delay of the entire operation progress, and ensuring the smooth progress of the drilling operation.

[0029] With reference to Figure 1 and Figure 2 , the outer wall of the fixing ring 15 is threadedly connected with the screw 7, and the outer wall of the screw 7 is threadedly connected with the anti-skid pad 8. The anti-skid pad 8 on the front side of the outer wall of the fixing ring 15 can increase the contact area between the fixing ring 15 and the drilled object, which can effectively avoid the sliding phenomenon caused by insufficient contact area during drilling, thereby improving the stability and safety of drilling;

[0030] Specifically, the non-slip pad 8 on the front side of the outer wall of the fixing ring 15 can increase the contact area between the fixing ring 15 and the drilled object, thereby effectively avoiding the sliding phenomenon caused by insufficient contact area during drilling, and improving the stability and safety of drilling.

[0031] Working principle: by sleeving the clamping block 13 on the rear side of the outer wall of the hollow long barrel 1 on the electric drill, then rotating the buckle 14 on the left side of the outer wall of the clamping block 13 to fix the hollow long barrel 1 on the electric drill, then manually sliding the outer tooth groove plate 16 in the top groove 17 of the hollow long barrel 1, and moving to the front side through the tooth groove outside the outer tooth groove plate 16 and the sawtooth 2 on the left side of the inner wall of the groove 17, then rotating the square short plate 6 to rotate the front side fixing ring 11 to the front side, and finally the drill bit 9 starts to work. When the drill bit 9 becomes deeper with the depth of the drilling, the impact force generated will be transmitted to the rear spring 10 through the fixing ring 15. When the spring 10 is impacted, it will transmit the force to the outer tooth groove plate 16. Because one side of the inner wall of the groove 17 is without the sawtooth 2, the outer tooth groove plate 16 will gradually retreat backward along the sawtooth 2 on the left side of the inner wall of the groove 17 to absorb the impact force, thereby avoiding the problem that the hand holding the electric drill loses control of the drill bit 9 due to hand fatigue caused by the vibration impact force on the arm of the worker during long-time electric drill drilling, causing serious safety accidents.

[0032] When drilling, if it is necessary to replace the drill bit 9 of different sizes or shapes, the drawer 4 inside the hollow box 5 on the left side of the outer wall of the hollow long barrel 1 can be pulled out to take out the required spare drill bit 9, and then the drill bit 9 is installed on the electric drill, thereby reducing the long process of replacing the drill bit 9, improving the work efficiency, and avoiding the problem that the subsequent drilling work is affected due to forgetting to carry the required drill bit 9 when replacing the drill bit 9, resulting in delay of the entire operation progress, ensuring the smooth progress of the drilling operation, and avoiding the problem that the subsequent drilling work is affected due to forgetting to carry the required drill bit 9 when replacing the drill bit 9.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A round hammer drill bit comprising a hollow long cylinder (1), characterized in that: The top of the hollow long cylinder (1) is provided with a groove (17), the inner wall left side of the groove (17) is equidistantly fixedly connected with a plurality of sawtooth (2), the inside of the groove (17) is slidably connected with an outer tooth groove plate (16), the outer wall front side of the outer tooth groove plate (16) is rotatably connected with a square short plate (6), the outer wall front side of the square short plate (6) is fixedly connected with a fixed ring (11), the outer wall front side of the fixed ring (11) is equidistantly fixedly connected with a plurality of springs (10), the other end of the spring (10) is fixedly connected with a fixed ring (15), the outer wall rear side of the hollow long cylinder (1) is fixedly connected with a clamping block (13), the outer wall left side of the clamping block (13) is rotatably connected with a buckle (14), the inner wall middle part of the hollow long cylinder (1) is provided with a drill bit (9).

2. A round-shank hammer drill bit according to claim 1, characterized in that: The outer wall left side of the hollow long cylinder (1) is fixedly connected with a hollow box (5), the inside of the hollow box (5) is slidably connected with a drawer box (4).

3. A round-shank hammer drill bit according to claim 2, characterized in that: The top of the drawer box (4) is fixedly connected with a handle (3), the outer wall of the handle (3) is fixedly connected with an antiskid sleeve (12).

4. The round-shank hammer drill bit of claim 1 wherein: The outer wall front side of the fixed ring (15) is threadedly connected with a screw one (7), the outer wall of the screw one (7) is threadedly connected with an antiskid pad (8).

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