Square-shank electric hammer drill bit

Abstract

The utility model relates to the technical field of drill bits, and discloses a square handle electric hammer drill bit which comprises a handle head, a first drill rod and a second drill rod, adjusting grooves are formed in the front side and the rear side of the handle head respectively, connecting pieces are connected into the two adjusting grooves in a sliding mode respectively, and a plurality of sliding grooves are formed in the left side and the right side of the handle head respectively. And the inner walls of the multiple sliding grooves are slidably connected with reinforcing plates, the adjacent sides of the multiple reinforcing plates are fixedly connected to the left sides and the right sides of connecting pieces, the adjacent sides of the multiple reinforcing plates are fixedly connected with rubber pads, and the adjacent sides of the two connecting pieces are provided with connecting holes. According to the utility model, after the bolts are screwed into the reinforcing holes, the connecting pieces are mutually combined and clamped on the inner wall of the handle head, and meanwhile, the rubber pads are mutually extruded, so that the connecting pieces are quickly reinforced, and are fixedly connected with the connecting bolts on the device through the connecting holes in the connecting pieces, and the mounting accuracy and the adaptability of the drill bit are 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 uses piston movement and compressed gas to impact the drill bit. It does not require much hand strength and can drill holes in hard materials such as concrete, bricks and stone. Because the drill bit of the electric hammer produces rapid reciprocating motion and frequent impacts along the direction of the electric drill rod while rotating, it can quickly drill holes in brittle cement concrete and stone materials.

[0003] After searching, the Chinese patent publication number is: CN204748951U, which discloses an electric hammer drill bit; including a drill bit body; the drill bit body is made of cemented carbide; the front end and the rear end of the drill bit body are both provided with a grid pattern; the outer periphery of the grid pattern is sintered with a polycrystalline diamond layer through ultra-high pressure and high temperature; the rear end of the drill bit body is provided with a mounting position for mounting with an electric hammer. The electric hammer drill bit of this utility model is a composite of cemented carbide and polycrystalline diamond layer, combining the advantages of both to form a complementary structure; the grid pattern enables the polycrystalline diamond layer to be well composited with the cemented carbide, thereby improving its mechanical strength, wear resistance and impact resistance. However, in actual use, the above-mentioned device has the problem that the drill bit is installed and reinforced by inserting the top end of the drill bit into the output end of the device and rotating the bolt on the output end. However, the drill bit cannot be accurately matched with the mounting slots and bolt connection positions on different models of devices, resulting in reduced adaptability of the drill bit. Therefore, a square-shank electric hammer drill bit is proposed to solve the above-mentioned problem. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides a square-handled electric hammer drill, which aims to improve the problem in the prior art that the drill bit cannot be accurately matched with the connection positions of the mounting slots and bolts on different models of devices, resulting in reduced adaptability of the drill bit.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a square-handled electric hammer drill bit, comprising a handle head, a drill rod 1 and a drill rod 2, the front and rear sides of the handle head are provided with adjustment slots, the interiors of the two adjustment slots are slidably connected with connecting pieces, the left and right sides of the handle head are provided with multiple sliding slots, the inner walls of the multiple sliding slots are slidably connected with reinforcement plates, the adjacent sides of the multiple reinforcement plates are fixedly connected to the left and right sides of the connecting piece, the adjacent sides of the multiple reinforcement plates are fixedly connected with rubber pads, the adjacent sides of the two connecting pieces are provided with connection holes, the adjacent sides of the two connecting pieces are provided with reinforcement holes, the two reinforcement holes are threadedly connected by bolts, and the bottom end of the drill rod 2 is provided with a positioning mechanism.

[0006] Through the above technical solution: according to the actual size, the position of the connecting piece in the adjustment groove is adjusted. After the adjustment is completed, the bolt is rotated and inserted into the reinforcement hole. The reinforcement plates on both sides are connected by rubber pads. When the rubber pads are squeezed against each other, the two connecting pieces fit together to achieve rapid reinforcement of the connecting piece, and are connected and fixed with the connecting bolt on the device through the connecting hole on the connecting piece.

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

[0008] The positioning mechanism includes a mounting groove, which is opened at the bottom end of the drill rod 2. The top inner side of the mounting groove is fixedly connected to a spring telescopic rod, and the bottom end of the spring telescopic rod is fixedly connected to a positioning drill. The bottom inner wall of the mounting groove is fixedly connected to a sleeve, and the inner wall of the sleeve is provided with limiting grooves around it. The inner walls of multiple limiting grooves are slidably connected to limiting blocks, and the adjacent sides of multiple limiting blocks are fixedly connected to the outer wall around the positioning drill.

[0009] Through the above technical solution: with the help of the elastic potential energy of the spring telescopic rod, the positioning drill is pushed out of the bottom end of the drill rod two. When the drill rod two is drilling, the positioning drill first contacts the area to be processed, thereby improving the stability of the drill rod two during drilling. As pressure is applied to the drill rod two, the spring telescopic rod contracts, causing the drill rod two to contact the processing area, thereby achieving precise drilling processing. Stable drilling can be achieved without pre-drilling, thereby improving the reliability of the device.

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

[0011] A sealing notch is provided on the front side of the front connecting piece, and a sealing ring is fixedly connected to the front end of the outer wall of the bolt.

[0012] Through the above technical solution: the sealing groove on the connecting part is fitted with the sealing ring to ensure the sealing of the reinforcement hole, prevent external liquid from entering, and increase the service life of the bolt.

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

[0014] The outer wall of the sealing ring is slidably connected to the inner wall of the sealing notch, and the front end of the bolt is provided with a hexagram groove.

[0015] Through the above technical solution: the front end of the bolt adopts a hexagonal slot design, which can be used with tools of different sizes.

[0016] As a further description of the above technical solution:

[0017] A discharge groove 1 is provided on the outer wall of the drill rod 1, and a blade 1 is fixedly connected to the outer wall of the drill rod 1.

[0018] Through the above technical solution: the discharge chute can facilitate the discharge of debris and improve the drilling efficiency.

[0019] As a further description of the above technical solution:

[0020] The bottom end of the drill rod 1 is fixedly connected with a positioning head, and the outer wall of the positioning head is provided with heat dissipation grooves all around.

[0021] Through the above technical solution: the positioning head helps to improve the accuracy of the processing of the drill rod 1 and improve the processing efficiency.

[0022] As a further description of the above technical solution:

[0023] A second discharge groove is provided on the outer wall of the second drill rod, and a second blade is fixedly connected to the outer wall of the second drill rod.

[0024] Through the above technical solution: the blade 2 and the drill rod 2 are designed as an integrated whole, and the drilling efficiency can be further improved by the blade 2.

[0025] As a further description of the above technical solution:

[0026] The bottom end of the drill rod 2 is fixedly connected with blade heads all around, and the top of the handle is fixedly connected with a magnetic plate.

[0027] Through the above technical solution, the blade head can not only improve the drilling efficiency of the drill rod 2, but also increase the service life of the drill rod 2.

[0028] The utility model has the following beneficial effects:

[0029] 1. In the present invention, the position of the connector in the adjustment slot is adjusted according to the actual size. After the adjustment is completed, when the bolt is screwed into the reinforcement hole, the connectors will merge and clamp on the inner wall of the handle. At the same time, the rubber pads will squeeze each other, so that the two connectors fit together, realizing rapid reinforcement of the connector. The connector is then connected and fixed with the connecting bolt on the device through the connecting hole on the connector, thereby improving the accuracy of installation and the adaptability of the drill bit.

[0030] 2. In the present invention, the elastic potential energy of the spring telescopic rod is used to push the positioning drill out of the bottom end of the drill rod 2. When the drill rod 2 is drilling, the positioning drill first contacts the area to be processed to ensure that the positioning drill can accurately position the area to be processed. As pressure is applied to the drill rod 2, the spring telescopic rod contracts, and then the drill rod 2 is brought into contact with the processing area. The drilling force is increased by the blade head at the bottom end of the drill rod 2, thereby achieving precise drilling processing. Stable drilling can be achieved without pre-drilling, thereby improving the reliability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1This is a three-dimensional diagram of a square-shank electric hammer drill bit proposed by the present invention;

[0032] Figure 2 This is a front view of a square-shank electric hammer drill bit proposed by the utility model;

[0033] Figure 3 This is a disassembled diagram of a square-shank electric hammer drill bit proposed in the utility model;

[0034] Figure 4 This is a structural schematic diagram of the shank of a square-shank electric hammer drill bit proposed in the present invention;

[0035] Figure 5 This is a disassembled diagram of the positioning mechanism of a square-shank electric hammer drill bit proposed in the utility model.

[0036] Legend:

[0037] 1. Handle; 2. Positioning mechanism; 201. Mounting slot; 202. Spring telescopic rod; 203. Sleeve; 204. Limiting slide; 205. Positioning drill; 206. Limiting block; 3. Adjusting slot; 4. Connector; 5. Sliding slot; 6. Reinforcement plate; 7. Rubber pad; 8. Connecting hole; 9. Reinforcement hole; 10. Bolt; 11. Sealing notch; 12. Sealing ring; 13. Hexagonal slot; 14. Drill rod 1; 15. Discharge slot 1; 16. Positioning head; 17. Heat dissipation slot; 18. Drill rod 2; 19. Discharge slot 2; 20. Blade head; 21. Blade 1; 22. Blade 2; 23. Magnetic plate. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] Example 1:

[0040] Reference Figure 1 、 Figure 3 and Figure 4The present invention provides an embodiment of a square handle electric hammer drill, comprising a handle 1, a drill rod 14 and a drill rod 2 18. The front and rear sides of the handle 1 are provided with an adjusting slot 3, and the interiors of the two adjusting slots 3 are slidably connected with a connecting piece 4. The inner diameter of the adjusting slot 3 on the handle 1 is adapted to the diameter of the connecting piece 4, so as to improve the smoothness of movement of the connecting piece 4 in the adjusting slot 3. The left and right sides of the handle 1 are provided with a plurality of sliding slots 5, and the inner walls of the plurality of sliding slots 5 are slidably connected with a reinforcing plate 6, which is connected to the reinforcing plate 6 through the sliding slot 5. The reinforcing plate 6 can not only limit the connection piece 4, but also be reinforced in the handle 1 to realize the reinforcement of the connecting piece 4 in the later stage. The adjacent sides of the plurality of reinforcing plates 6 are fixedly connected to the left and right sides of the connecting piece 4, and the adjacent sides of the plurality of reinforcing plates 6 are fixedly connected with a rubber pad 7. The pad 7 is arranged between the reinforcement plates 6 to provide a certain degree of tightness between the connectors 4 to facilitate the sliding of the connectors 4. A connecting hole 8 is provided on the adjacent side of the two connectors 4, and a reinforcement hole 9 is provided on the adjacent side of the two connectors 4. The two reinforcement holes 9 are threadedly connected by bolts 10. When the bolts 10 are connected to the reinforcement holes 9, the connectors 4 are merged with each other by the bolts 10. At the same time, the rubber pads 7 are squeezed against each other, and the screw on the output end of the device is connected and installed through the connecting hole 8 on the connector 4, thereby improving the accuracy of installation and the adaptability of the drill bit. A positioning mechanism 2 is provided at the bottom end of the drill rod 2 18, and a discharge groove 15 is provided on the outer wall of the drill rod 14. A blade 21 is fixedly connected to the outer wall of the drill rod 14, and a positioning head 16 is fixedly connected to the bottom end of the drill rod 14. The outer wall of the positioning head 16 is provided with a heat dissipation groove 17.

[0041] Specifically, the front and rear sides of the handle 1 are provided with adjusting grooves 3 for accommodating and slidingly connecting the connecting piece 4. The inner diameter of the adjusting groove 3 matches the diameter of the connecting piece 4, ensuring that the connecting piece 4 can move smoothly in the adjusting groove 3 without hindrance. The left and right sides of the handle 1 are respectively provided with multiple sliding grooves 5. The inner walls of the sliding grooves 5 are slidably connected with reinforcement plates 6. The reinforcement plates 6 can not only move in the sliding grooves 5 to limit the connecting piece 4, but also reinforce the connecting piece 4 in the later stage. The connecting piece 4 and the reinforcement plate 6 are connected to each other. The adjacent side of the reinforcement plate 6 is fixedly connected with a rubber pad 7. The rubber pad 7 provides a certain tightness between the connecting piece 4, so that the connecting piece 4 can be more flexible when sliding, while ensuring the stability of the structure; the adjacent side of the connecting piece 4 is provided with a connecting hole 8 for connecting and installing with the screw at the output end of the device, and the adjacent side of the two connecting pieces 4 is also provided with a reinforcement hole 9, which is threadedly connected by a bolt 10.

[0042] Example 2:

[0043] Reference Figure 2 、 Figure 4 and Figure 5The present invention provides an embodiment of the positioning mechanism 2 including a mounting groove 201, which is provided at the bottom end of the drill rod 18. A spring telescopic rod 202 is fixedly connected to the top inner side of the mounting groove 201, and a certain running space is provided for the spring telescopic rod 202 through the mounting groove 201. A positioning drill 205 is fixedly connected to the bottom end of the spring telescopic rod 202, and the positioning drill 205 is pushed out of the bottom end of the drill rod 18 by means of the elastic potential energy of the spring telescopic rod 202. A sleeve 203 is fixedly connected to the bottom of the inner wall of the mounting groove 201, and limited sliding grooves 204 are provided around the inner wall of the sleeve 203. The inner walls of the plurality of limited sliding grooves 204 are all sliding. A movable connection limit block 206 is provided, and adjacent sides of multiple limit blocks 206 are fixedly connected to the outer wall of the positioning drill 205. The limit block 206 slides in the sleeve 203 to provide a stable sliding space for the positioning drill 205. The positioning drill 205 can accurately position the position to be processed, thereby improving the rapid positioning processing of the drill rod 18. A discharge groove 29 is provided on the outer wall of the drill rod 18. A blade 22 is fixedly connected to the outer wall of the drill rod 18. A blade head 20 is fixedly connected to the bottom end of the drill rod 18. The blade head 20 is used around the bottom end of the drill rod 18 to increase the drilling force and further improve the drilling efficiency.

[0044] Specifically, the mounting groove 201 is opened at the bottom end of the drill rod 18, and the inner top position of the mounting groove 201 is fixedly connected to the spring telescopic rod 202. The spring telescopic rod 202 provides sufficient running space through the mounting groove 201, and the bottom end of the spring telescopic rod 202 is fixedly connected to the positioning drill 205. The elastic potential energy of the spring telescopic rod 202 can effectively push the positioning drill 205 out of the bottom end of the drill rod 18, thereby achieving precise positioning. The bottom of the inner wall of the mounting groove 201 is fixedly connected to the sleeve 203, and a plurality of limiting grooves 204 are evenly opened around the inner wall of the sleeve 203. The inner wall of the limiting groove 204 is slidably connected to a plurality of limiting blocks 206, the adjacent side of the limit block 206 is fixedly connected to the outer wall of the positioning drill 205, and the limit block 206 slides in the sleeve 203, providing a stable sliding space for the positioning drill 205, ensuring that the positioning drill 205 can be accurately positioned with the position to be processed, thereby improving the rapid positioning and processing capabilities of the drill rod 2 18, and a discharge groove 2 19 is opened on the outer wall of the drill rod 2 18, and a blade 2 22 is fixedly connected to the outer wall of the drill rod 2 18. In addition, a blade head 20 is fixedly connected around the bottom end of the drill rod 2 18. By using the blade head 20 around the bottom end of the drill rod 2 18 to increase the drilling force, the drilling efficiency is further improved.

[0045] Reference Figure 3 and Figure 4A sealing notch 11 is provided on the front side of the front connecting member 4, a sealing ring 12 is fixedly connected to the front end of the outer wall of the bolt 10, the outer wall of the sealing ring 12 is slidably connected to the inner wall of the sealing notch 11, a plum blossom groove 13 is provided on the front end of the bolt 10, and a magnetic plate 23 is fixedly connected to the top of the handle 1;

[0046] Specifically, a sealing groove 11 is provided at the front end of the front connecting member 4. In order to ensure good sealing performance between the connecting member 4 and the bolt 10, a sealing ring 12 is fixedly connected to the front end of the outer wall of the bolt 10. The outer wall of the sealing ring 12 can slide smoothly and fit tightly on the inner wall of the sealing groove 11. A hexagonal groove 13 is provided at the front end of the bolt 10, which not only increases the gripping area of ​​the bolt and makes operation more convenient, but also provides more gripping points for the bolt, thereby improving the stability and reliability of the connection.

[0047] Working principle: First, adjust the position of the connector 4 in the adjustment slot 3 according to the actual size. After the adjustment is completed, when the bolt 10 is screwed into the reinforcement hole 9, the connectors 4 will merge with each other, and the rubber pads 7 will squeeze each other, so that the two connectors 4 fit together, achieving rapid reinforcement of the connector 4. The connector 4 is then connected and fixed to the connecting bolt on the device through the connecting hole 8 on the connector 4, improving the accuracy of installation and the adaptability of the drill bit.

[0048] In addition, with the help of the elastic potential energy of the spring telescopic rod 202, the positioning drill 205 is pushed out of the bottom end of the drill rod 18. When the drill rod 18 is drilling, the positioning drill 205 first contacts the area to be processed to ensure that the positioning drill 205 can accurately position the position to be processed. As the drill rod 18 applies pressure, the spring telescopic rod 205 contracts, causing the drill rod 18 to contact the processing area. By increasing the drilling force through the blade head 20 at the bottom end of the drill rod 18, accurate drilling processing is achieved. Stable drilling can be achieved without pre-drilling, thereby improving the reliability of the device.

[0049] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A square-shank electric hammer drill bit, comprising a shank (1), a drill rod (14) and a drill rod (18), characterized in that: The front and rear sides of the handle (1) are provided with adjustment slots (3), the interiors of the two adjustment slots (3) are slidably connected to a connecting member (4), the left and right sides of the handle (1) are provided with a plurality of sliding slots (5), the inner walls of the plurality of sliding slots (5) are slidably connected to a reinforcement plate (6), the adjacent sides of the plurality of reinforcement plates (6) are fixedly connected to the left and right sides of the connecting member (4), the adjacent sides of the plurality of reinforcement plates (6) are fixedly connected to a rubber pad (7), the adjacent sides of the two connecting members (4) are provided with a connection hole (8), the adjacent sides of the two connecting members (4) are provided with a reinforcement hole (9), the two reinforcement holes (9) are threadedly connected by a bolt (10), and the bottom end of the drill rod (18) is provided with a positioning mechanism (2).

2. The square-shank electric hammer drill according to claim 1, characterized in that: The positioning mechanism (2) includes a mounting groove (201), the mounting groove (201) is provided at the bottom end of the drill rod (18), the inner top of the mounting groove (201) is fixedly connected to a spring telescopic rod (202), the bottom end of the spring telescopic rod (202) is fixedly connected to a positioning drill (205), the inner wall bottom of the mounting groove (201) is fixedly connected to a sleeve (203), the inner wall of the sleeve (203) is provided with limiting sliding grooves (204) around the periphery, the inner walls of the plurality of limiting sliding grooves (204) are slidably connected to limiting blocks (206), and the adjacent sides of the plurality of limiting blocks (206) are fixedly connected to the periphery of the outer wall of the positioning drill (205).

3. The square-shank electric hammer drill according to claim 1, characterized in that: A sealing notch (11) is provided on the front side of the front connecting member (4), and a sealing ring (12) is fixedly connected to the front end of the outer wall of the bolt (10).

4. A square shank electric hammer drill according to claim 3, characterized in that: The outer wall of the sealing ring (12) is slidably connected to the inner wall of the sealing notch (11), and a hexagonal groove (13) is provided at the front end of the bolt (10).

5. The square-shank electric hammer drill according to claim 1, characterized in that: A discharge groove (15) is provided on the outer wall of the drill rod (14), and a blade (21) is fixedly connected to the outer wall of the drill rod (14).

6. The square-shank electric hammer drill according to claim 1, characterized in that: The bottom end of the drill rod 1 (14) is fixedly connected to a positioning head (16), and heat dissipation grooves (17) are provided around the outer wall of the positioning head (16).

7. The square-shank electric hammer drill according to claim 1, characterized in that: The outer wall of the second drill rod (18) is provided with a second discharge groove (19), and the outer wall of the second drill rod (18) is fixedly connected with a second blade (22).

8. The square-shank electric hammer drill according to claim 1, characterized in that: The bottom end of the second drill rod (18) is fixedly connected to a blade head (20) on all sides, and the top of the handle (1) is fixedly connected to a magnetic plate (23).

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