Handheld electric percussion drill

Abstract

The utility model belongs to the technical field of electric percussion drills, and relates to a handheld electric percussion drill which comprises a shell and a drill bit, a connecting box rotatably penetrates through the side face of the left end of the shell, a butt joint cylinder is fixedly connected to the left end of the connecting box, a fixing assembly for fixing the drill bit is arranged on the butt joint cylinder, and the fixing assembly comprises two connecting plates. The two connecting plates are symmetrically and rotatably connected to the interior of the butt-joint cylinder, two telescopic assemblies are arranged in the butt-joint cylinder and drive the corresponding connecting plates to rotate, clamping plates are fixedly connected to the ends of the connecting plates, and the clamping plates are in clamping fit with the drill bit. The device has the advantages that the connecting plates are arranged, the two connecting plates are symmetrically and rotationally connected to the butt joint cylinder, the clamping plates and the pressing blocks are arranged at the two ends of the connecting plates correspondingly, the inclined ends of the clamping plates are moved into the clamping grooves through rotation of the connecting plates, the clamping plates fix the drill bit, the drill bit only needs to be pushed into the butt joint cylinder during installation, and more convenience and rapidness are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric impact drills and relates to a handheld electric impact drill. Background Art

[0002] An electric impact drill is an electric tool that mainly uses rotary cutting and has an impact mechanism that relies on the operator's thrust to produce impact force. It is used for drilling holes in materials such as bricks, blocks and lightweight walls.

[0003] A handheld lithium-ion electric drill with a hand protection structure disclosed in Chinese patent CN218555662U is provided with a rechargeable handle, which is fixedly mounted on the lower end of a handheld drill body, a drill switch is provided at the connection between the handheld drill body and the rechargeable handle, a hand cushion cover is provided on the inner side of the rechargeable handle, and a hand protection structure is provided on the outer side of the hand cushion cover on the rechargeable handle. The hand protection structure has a good protective shielding effect on the electric drill.

[0004] The electric drill is used after the drill bit is inserted into the drilling head and fixed. When the electric drill is used to drill holes in different materials, different drill bits need to be replaced, and the staff needs to tighten the drill bit or use a wrench to tighten it, which makes the replacement and adjustment speed slow.

[0005] In order to solve the above problems, the utility model provides a handheld electric impact drill. Utility Model Content

[0006] In order to solve the problems existing in the background technology, the utility model proposes a handheld electric impact drill.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows: comprising a housing and a drill bit, a connection box is rotatably penetrated on the side surface of the left end of the housing, a docking sleeve is fixedly connected to the left end of the connection box, and a fixing assembly for fixing the drill bit is arranged on the docking sleeve;

[0008] The fixing assembly includes two connecting plates, which are symmetrically rotatably connected to the inside of the docking tube. Two telescopic assemblies are arranged inside the docking tube, and the telescopic assemblies respectively drive the corresponding connecting plates to rotate;

[0009] The ends of the connecting plates are fixedly connected with clamping plates, and the clamping plates are clamped and matched with the drill bits.

[0010] Furthermore, a motor is fixedly connected to the right end of the inner cavity of the shell, a rotating shaft is fixedly connected to the output end of the motor, and the connection box is fixedly connected to the left end of the rotating shaft.

[0011] Furthermore, two receiving grooves are symmetrically provided on the docking tube, the middle parts of the two receiving grooves are rotatably connected with a rotating column, and the two connecting plates are respectively fixed and penetrate the corresponding rotating columns.

[0012] Furthermore, the telescopic assembly includes a spring, and two springs are arranged inside each accommodating groove. One end of the spring is fixedly connected to the side of the connecting plate close to the drill bit, and the other end of the spring is fixedly connected to the side wall of the accommodating groove. The two springs located in the accommodating groove are both fixedly connected to the end of the connecting plate away from the clamping plate.

[0013] Furthermore, a pressure block is fixedly connected to a side of the connecting plate away from the spring, one end of the pressure block extends to the outside of the docking tube, and the pressure block is located at an end of the connecting plate away from the clamping plate.

[0014] Furthermore, two grooves are provided on the docking tube, and the grooves are respectively connected to the corresponding accommodating grooves. The bottom end of the clamping plate is inclined, and the inclined end of the clamping plate passes through the corresponding grooves.

[0015] Furthermore, the drill bit is symmetrically provided with two card slots, the inclined ends of the card plate are respectively engaged with the corresponding card slots, and the two side surfaces of the end of the card slot are respectively provided with an inclined surface and an arc surface, and the inclined surface and the arc surface are adapted to the inclined end of the card plate;

[0016] Two positioning grooves are symmetrically arranged on the outer surface of the drill bit end, and the positioning grooves correspond to the clamping grooves one by one.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] 1. The handheld electric impact drill is provided with a connecting plate, and the two connecting plates are symmetrically rotated and connected to the docking tube. When installing the drill bit, insert one end of the drill bit into the docking tube, and the drill bit will push the clamping plate into the docking tube. The rotation of the connecting plate will compress the spring, so that the inclined end of the clamping plate will first slide on the positioning groove. After the arc surface passes through the clamping plate, the inclined end of the clamping plate will move into the clamping groove under the push of the spring elastic force, so that the clamping plate fixes the drill bit. When installing, you only need to push the drill bit into the docking tube, which is more convenient and quick.

[0019] 2. When replacing the drill bit of the handheld electric impact drill, the pressure block is pressed toward the inside of the docking tube to rotate the connecting plate, and the clamping plate rotates toward the inside of the docking tube. When the clamping plate rotates, the inclined end of the clamping plate will push the drill bit toward the outside of the docking tube until the inclined end of the clamping plate leaves the inclined surface, thereby facilitating the removal of the drill bit. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0021] Figure 2 It is a cross-sectional view in the utility model;

[0022] Figure 3 This utility model Figure 2Schematic diagram of the structure enlarged at point A in the middle.

[0023] In the figure: 1. shell; 2. handle; 3. base; 4. motor; 5. connection box; 6. docking tube; 7. drill bit; 8. rotating column; 9. connecting plate; 10. clamping plate; 11. spring; 12. pressure block; 13. inclined surface; 14. arc surface; 15. receiving groove; 16. positioning groove. DETAILED DESCRIPTION

[0024] 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.

[0025] like Figure 1-Figure 3 As shown, the technical solution adopted by the utility model is as follows: a handheld electric impact drill comprises a shell 1 and a drill bit 7, a handle 2 is fixedly connected to the outer surface of the shell 1, and a base 3 is arranged at the bottom of the handle 2.

[0026] A connection box 5 is rotatably penetrated on the side surface of the left end of the housing 1. A motor 4 is fixedly connected to the right end of the inner cavity of the housing 1, a rotating shaft is fixedly connected to the output end of the motor 4, and the connection box 5 is fixedly connected to the left end of the rotating shaft.

[0027] The left end of the connection box 5 is fixedly connected with a docking sleeve 6 , and a fixing assembly for fixing the drill bit 7 is arranged on the docking sleeve 6 .

[0028] The fixing assembly includes two connecting plates 9, and the two connecting plates 9 are symmetrically rotatably connected to the inside of the docking tube 6. Two telescopic assemblies are arranged inside the docking tube 6, and the telescopic assemblies respectively drive the corresponding connecting plates 9 to rotate.

[0029] Two receiving grooves 15 are symmetrically provided on the docking tube 6 . The middle parts of the two receiving grooves 15 are rotatably connected with the rotating pillars 8 . The two connecting plates 9 are fixedly passed through the corresponding rotating pillars 8 .

[0030] The ends of the connecting plates 9 are fixedly connected with clamping plates 10 , and the clamping plates 10 are clamped and matched with the drill bits 7 .

[0031] The telescopic assembly includes a spring 11, and two springs 11 are arranged inside each receiving groove 15. One end of the spring 11 is fixedly connected to the side of the connecting plate 9 close to the drill bit 7, and the other end of the spring 11 is fixedly connected to the side wall of the receiving groove 15. The two springs 11 located in the receiving groove 15 are both fixedly connected to the end of the connecting plate 9 away from the clamping plate 10.

[0032] A pressure block 12 is fixedly connected to one side of the connecting plate 9 away from the spring 11, and one end of the pressure block 12 extends out of the docking tube 6. The pressure block 12 is located at one end of the connecting plate 9 away from the clamping plate 10.

[0033] Two grooves are provided on the docking tube 6, and the grooves are respectively communicated with the corresponding receiving grooves 15. The bottom end of the clamping plate 10 is inclined, and the inclined end of the clamping plate 10 passes through the corresponding grooves.

[0034] The drill bit 7 is symmetrically provided with two slots, and the inclined ends of the clamping plate 10 are respectively engaged with the corresponding slots. The two side surfaces of the end of the slot are respectively provided with an inclined surface 13 and an arc surface 14, and the inclined surface 13 and the arc surface 14 are both adapted to the inclined end of the clamping plate 10.

[0035] Two positioning grooves 16 are symmetrically formed on the outer surface of the end of the drill bit 7, and the positioning grooves 16 correspond to the clamping grooves one by one. When the drill bit 7 is installed, the drill bit 7 is pushed into the inside of the docking tube 6 according to the position of the positioning grooves 16, so that the positioning grooves 16 correspond to the position of the clamping plate 10.

[0036] Working principle:

[0037] When the drill bit 7 needs to be installed, the drill bit 7 is moved to the end of the docking tube 6. The drill bit 7 is rotated so that the position of the positioning groove 16 corresponds to the respective clamping plate 10.

[0038] The drill bit 7 is pushed toward the inside of the docking tube 6 , and the drill bit 7 pushes the inclined end of the clamping plate 10 , so that the clamping plate 10 passes through the corresponding grooves and moves toward the inside of the accommodating groove 15 , and the inclined end of the clamping plate 10 slides on the positioning groove 16 .

[0039] When the clamping plate 10 moves into the docking tube 6, the clamping plate 10 and the connecting plate 9 rotate because the rotating column 8 is rotatably connected with the docking tube 6. The other end of the connecting plate 9 compresses the spring 11, so that the pressing block 12 moves into the docking tube 6.

[0040] The drill bit 7 is pushed continuously, and the arc surface 14 passes the inclined end of the clamping plate 10. Then, the clamping plate 10 rotates under the elastic force of the spring 11, so that the inclined end of the clamping plate 10 passes the inclined surface 13 and moves into the clamping groove, and the end of the pressing block 12 also extends out of the docking tube 6. At this time, the drill bit 7 is fixed on the docking tube 6 by the inclined end of the clamping plate 10.

[0041] Start the motor 4, so that the rotating shaft drives the connecting box 5 to rotate, and drives the docking tube 6 and the drill bit 7 to rotate.

[0042] When the drill bit 7 needs to be replaced, the two pressing blocks 12 are pressed together into the interior of the docking tube 6 , and the pressing block 12 pushes one end of the connecting plate 9 to rotate the connecting plate 9 and compress the spring 11 , so that the clamping plate 10 rotates into the interior of the accommodating groove 15 .

[0043] When the clamping plate 10 rotates, the inclined end of the clamping plate 10 pushes the drill bit 7, causing the drill bit 7 to slide a short distance outside the docking tube 6. After that, the inclined end of the clamping plate 10 passes through the inclined surface 13 and is located in the groove, and the drill bit 7 can be directly taken out. After being removed, the pressing block 12 is released and the drill bit 7 is replaced.

[0044] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A handheld electric impact drill, characterized in that: It comprises a housing (1) and a drill bit (7); a connection box (5) is rotatably penetrated on the side surface of the left end of the housing (1); a docking sleeve (6) is fixedly connected to the left end of the connection box (5); and a fixing assembly for fixing the drill bit (7) is provided on the docking sleeve (6); The fixing assembly comprises two connecting plates (9), the two connecting plates (9) are symmetrically rotatably connected to the inside of the docking tube (6), and two telescopic assemblies are arranged inside the docking tube (6), and the telescopic assemblies respectively drive the corresponding connecting plates (9) to rotate; The ends of the connecting plates (9) are fixedly connected with clamping plates (10), and the clamping plates (10) are clamped and matched with the drill bits (7).

2. The handheld electric impact drill according to claim 1, characterized in that: The right end of the inner cavity of the shell (1) is fixedly connected to a motor (4), the output end of the motor (4) is fixedly connected to a rotating shaft, and the connection box (5) is fixedly connected to the left end of the rotating shaft.

3. The handheld electric impact drill according to claim 1, characterized in that: The docking tube (6) is symmetrically provided with two receiving grooves (15), the middle parts of the two receiving grooves (15) are rotatably connected with a rotating column (8), and the two connecting plates (9) are respectively fixed and penetrate the corresponding rotating columns (8).

4. The handheld electric impact drill according to claim 3, characterized in that: The telescopic assembly comprises a spring (11), and two springs (11) are arranged inside each receiving groove (15), one end of the spring (11) is fixedly connected to a side of the connecting plate (9) close to the drill bit (7), and the other end of the spring (11) is fixedly connected to the side wall of the receiving groove (15), and the two springs (11) located in the receiving groove (15) are both fixedly connected to an end of the connecting plate (9) away from the clamping plate (10).

5. The handheld electric impact drill according to claim 4, characterized in that: A pressure block (12) is fixedly connected to a side of the connecting plate (9) away from the spring (11), one end of the pressure block (12) extends to the outside of the docking tube (6), and the pressure block (12) is located at an end of the connecting plate (9) away from the clamping plate (10).

6. The handheld electric impact drill according to claim 3, characterized in that: The docking tube (6) is provided with two grooves, which are respectively connected to the corresponding receiving grooves (15); the bottom end of the clamping plate (10) is inclined, and the inclined end of the clamping plate (10) passes through the corresponding grooves.

7. The handheld electric impact drill according to claim 6, characterized in that: The drill bit (7) is symmetrically provided with two slots, the inclined ends of the clamping plate (10) are respectively engaged with the corresponding slots, and the two side surfaces of the end of the slot are respectively provided with an inclined surface (13) and an arc surface (14), and the inclined surface (13) and the arc surface (14) are both adapted to the inclined end of the clamping plate (10); Two positioning grooves (16) are symmetrically arranged on the outer surface of the end of the drill bit (7), and the positioning grooves (16) correspond to the clamping grooves one by one.

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