Electric drill with impact function

Abstract

The electric drill with the impact function comprises a gear box body, an output shaft is arranged in the gear box body, and the two ends of the output shaft are installed in the gear box body through a limiting ring and a shifting bearing respectively. Movable impact teeth are arranged on the output shaft, static impact teeth are arranged in the gearbox body, and a first elastic piece is arranged between the limiting ring and the static impact teeth. An adjusting assembly is arranged on the outer layer of the gearbox body and comprises a torsion cup, a positioning ring and a limiting ball, and the torsion cup drives the positioning ring to rotate when rotating. The limiting bead is installed between the positioning ring and the limiting ring, a guiding through hole is formed in the gearbox body, and a plurality of containing grooves used for receding are formed in the positioning ring; and when the placing groove is aligned with the guide through hole, the limiting ring can push the limiting bead to move along the guide through hole. The output shaft capable of rotating and axially moving relative to the gear body is arranged in the gear body, and the dynamic impact teeth and the static impact teeth are matched with each other, so that the output shaft moves back and forth to achieve the impact function.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric drills, and particularly relates to an electric drill with an impact function. Background Art

[0002] An electric drill is a common electric tool, usually used for drilling holes; generally, a traditional electric drill includes a motor and an output shaft, and a working head is installed on the output shaft. When the motor rotates, it drives the working head on the output shaft to rotate, so as to realize drilling. Generally, the output shaft is installed in the machine body through bearings, and the output shaft cannot axially move relative to the machine body. In this way, the output shaft can only drive the working head to rotate and cannot realize the impact function. The structures of some construction drilling positions are relatively hard and need to be chiseled and impacted. Since the existing electric drills do not have the impact function, their versatility is poor. Therefore, it is necessary to design an electric drill with an impact function to overcome the above difficulties. Summary of the Invention

[0003] In view of the problems existing in the prior art, the utility model designs an electric drill with an impact function. In the gear main body, an output shaft that can rotate and axially move relative to it is arranged. Through the cooperation of a moving impact tooth and a static impact tooth, the output shaft moves back and forth to realize the impact function; by adjusting the component to limit the position of the limit bead, the telescopic state of the output shaft can be conveniently controlled.

[0004] The invention object of the utility model is realized through the following technical solutions: an electric drill with an impact function, including a gearbox main body, wherein a output shaft rotatably connected with the gearbox main body is arranged in the gearbox main body, and both ends of the output shaft are installed in the gearbox main body through a limit ring and a displacement bearing respectively; a moving impact tooth that rotates synchronously with the output shaft is arranged on the output shaft, a static impact tooth is arranged in the gearbox main body, and a first elastic part for resetting is arranged between the limit ring and the static impact tooth; a adjusting component rotatably connected with the outer layer of the gearbox main body is arranged on the outer layer of the gearbox main body, the adjusting component includes a torque cup, a positioning ring and a limit bead, the torque cup and the positioning ring are sleeved and installed on the outer layer of the gearbox main body, and the positioning ring rotates when the torque cup rotates; the limit bead is installed between the positioning ring and the limit ring, a plurality of guiding through holes for installing the limit bead are arranged in the gearbox main body, and a plurality of placing grooves for making way are arranged on the positioning ring; when the placing groove and the guiding through hole are aligned, the limit ring can push the limit bead to move along the guiding through hole.

[0005] Preferably, the adjusting assembly further includes a torque adjusting ring, a second elastic member, and a torque pressing plate; the torque adjusting ring is sleeved and installed on the outer side of the gearbox body and is slidably connected thereto, and the torque pressing plate is sleeved and installed on the outer layer of the gearbox body and abuts against the step of the gearbox body; an outer layer of the torque adjusting ring is provided with a torque cup threadedly connected thereto, and an opening end of the gearbox body is provided with a positioning assembly for positioning the torque cup; a plurality of second elastic members are evenly distributed between the torque adjusting ring and the torque pressing plate; the positioning ring is arranged inside the torque cup and is adjacent to the torque adjusting ring; a plurality of placement grooves are evenly distributed inside the positioning ring, and a limiting bead is arranged in each of the guiding through holes.

[0006] By providing the adjusting assembly, it is convenient to adjust the position of the positioning ring, thereby facilitating the adjustment of the positions of the guiding through holes and the placement grooves. When the electric drill is in the drilling gear, rotate the torque cup to misalign the placement grooves and the guiding through holes on the positioning ring, so that the limiting beads cannot move outward along the guiding through holes towards the outer side of the gearbox body, and the limiting beads can only contract inward along the guiding through holes towards the interior of the gearbox body. In this way, the limiting beads will abut against the limiting ring, and the limiting ring cannot axially move relative to the gearbox body. Then the output shaft cannot axially move, and the output shaft can only rotate relative to the gearbox body. At this time, the impact function is not available. When the electric drill is in the impact gear, rotate the torque cup to align the placement grooves and the guiding through holes on the positioning ring, and the limiting beads will have a moving space, and the limiting beads will give way to the limiting ring; when the limiting ring and the output shaft axially move synchronously, the limiting beads will move between the limiting ring and the placement grooves along the guiding through holes, so that the electric drill can achieve the impact function. Here, the torque adjusting ring, the second elastic member, and the torque pressing plate are provided. By pressing the torque cup with the torque adjusting ring, and the torque adjusting ring and the torque cup are threadedly connected, the torque cup will not randomly rotate relative to the gearbox body; only when the operator forcefully rotates the torque cup can the relative positions of the placement grooves and the guiding through holes be changed. The output shaft is connected to the motor through a reduction gearbox, and the reduction gearbox and the motor are not shown in the figure. The motor drives the output shaft to rotate through the reduction gearbox.

[0007] Preferably, the end of the positioning ring facing away from the torque adjusting ring is provided with a plurality of first limiting protrusions for limiting, and the torque cup is provided with a plurality of first limiting grooves, and the first limiting protrusions are arranged in the first limiting grooves; when the torque cup rotates, it drives the positioning ring to rotate, and when the positioning ring rotates, the placement grooves rotate relative to the guiding through holes. By engaging the first limiting protrusions in the first limiting grooves, the torque cup can drive the positioning ring to rotate synchronously when it rotates, thereby facilitating the adjustment of the position of the placement grooves.

[0008] Preferably, a plurality of second limiting protrusions for installing a torque adjusting ring are provided on the outer layer of the gearbox body, and the torque adjusting ring and the torque pressing plate are both sleeved on the second limiting protrusions; a second limiting groove for installing the second limiting protrusions is provided on the torque adjusting ring; the end face of the positioning ring and the end face of the second limiting protrusion are arranged adjacent to each other. By providing the second limiting protrusions, the torque adjusting ring is prevented from rotating relative to the gearbox body, so that when the torque cup rotates, the torque adjusting ring can only move axially along the second limiting protrusions. By providing the torque adjusting ring, the torque cup can rotate freely relative to the gearbox body, and there is better concentricity between the gearbox body and the torque cup. At the same time, the second limiting protrusions can axially limit the positioning ring to prevent the positioning ring from axially moving relative to the gearbox body.

[0009] Preferably, a plurality of positioning posts for positioning are provided on the torque adjusting ring, and a second elastic member is sleeved on the positioning posts; one end of the second elastic member abuts against the torque adjusting ring, and the other end abuts against the torque pressing plate. By providing the positioning posts, it is convenient to limit the second elastic member to prevent the second elastic member from detaching from the torque adjusting ring.

[0010] Preferably, the positioning assembly includes a snap ring and a gear position elastic piece; an annular clamping groove for installing the positioning assembly is provided on the gearbox body, the snap ring and the gear position elastic piece are arranged in the annular clamping groove, the gear position elastic piece is attached to the end face of the torque cup, and the snap ring and the gear position elastic piece are arranged adjacent to each other.

[0011] By providing the positioning assembly, it is convenient to axially limit the torque cup to prevent the torque cup from detaching from the open end of the gearbox body. Since the torque cup and the torque adjusting ring are threadedly connected and the torque adjusting ring is extruded by the second elastic member, the torque cup will always abut against the gear position elastic piece, preventing the torque cup from having an axial movement stroke during rotation adjustment.

[0012] Preferably, a plurality of uniformly distributed third limiting protrusions are provided on the inner side of the gear position elastic piece, and a plurality of uniformly distributed third limiting grooves are provided at the open end of the gearbox body; the third limiting protrusions are arranged in the third limiting grooves, and the third limiting protrusions extend along the radial direction of the output shaft. By providing the third limiting grooves and the third limiting protrusions, the gear position elastic piece is prevented from rotating relative to the gearbox body; at the same time, the third limiting protrusions extend along the radial direction of the output shaft, so that the gear position elastic piece can also axially limit the output shaft to prevent the output shaft from detaching from the gearbox body.

[0013] Preferably, both the limit ring and the shift bearing are deep groove ball bearings, and the output shaft can move axially along the main body of the gearbox during operation; an annular step for installing the shift bearing is provided inside the main body of the gearbox; the shift bearing is installed inside the static impact tooth, and the two are tightly connected; the static impact tooth is tightly installed inside the main body of the gearbox, and both the static impact tooth and the shift bearing abut against the annular step; one end of the first elastic member abuts against the limit ring, and the other end abuts against the static impact tooth.

[0014] When the torque cup rotates to the impact gear position, the placement groove on the positioning ring has aligned with the guiding through hole inside the main body of the gearbox. When the output shaft extends into the interior of the main body of the gearbox, the limit ring on the output shaft squeezes the limit beads along the guiding through hole into the placement groove. Thus, the output shaft can axially slide inside the main body of the gearbox, and the dynamic impact tooth on the output shaft can impact against the static impact tooth inside the main body of the gearbox, thereby achieving the impact effect. The dynamic impact tooth and the static impact tooth are always in a disengaged and engaged state, causing the output shaft to move back and forth axially to impact an object.

[0015] Preferably, the limit ring is tightly installed on the output shaft and abuts against the step of the output shaft; a dynamic impact tooth tightly connected to the output shaft is further provided on the output shaft, and the dynamic impact tooth and the limit ring are arranged in a fitting manner; the dynamic impact tooth and the static gear tooth are arranged opposite to each other, and an annular placement portion is provided on the limit ring, and the contour of the annular placement portion matches the contour of the limit bead. By providing the annular placement portion, it is convenient for the limit ring to push the limit bead, and the process of the output shaft moving is smoother.

[0016] Compared with the prior art, the utility model has the following beneficial effects: 1. The utility model has both a drilling gear position and an impact gear position, with better versatility, and can be conveniently switched between the two gear positions by rotating the torque cup, and the operation is simple and reliable. 2. By driving the positioning ring to rotate through the torque cup, the positions of the placement groove and the guiding through hole will change when the positioning ring rotates, so the stroke of the limit bead inside the guiding through hole will change; the output shaft is limited by the limit bead, facilitating the switching of the working state of the output shaft; when in the drilling gear position, the limit bead cannot move outward from the main body of the gearbox, and the limit bead abuts against the limit ring to limit the output shaft. When in the impact gear position, the placement groove and the guiding through hole are aligned, so that the limit bead gives way to the limit ring, and thus the output shaft can stretch back and forth. 3. Through the cooperation between the dynamic impact tooth on the output shaft and the static impact tooth inside the main body of the gearbox, the output shaft has a good impact effect, and the output shaft is reset by the first elastic member, enabling the output shaft to continuously stretch and have a better impact effect. Description of the Drawings

[0017] Figure 1 is a three-dimensional view of the utility model;

[0018] Figure 2Internal structure diagram of the present utility model;

[0019] Figure 3 Exploded view of the present utility model;

[0020] Figure 4 Exploded view of the present utility model from another perspective;

[0021] Figure 5 Internal structure diagram of the gearbox body;

[0022] Figure 6 Stereogram of the positioning ring;

[0023] Figure 7 Stereogram of the limit ring;

[0024] Markings in the figure: 1. Gearbox body; 2. Output shaft; 3. Limit ring; 4. Shifting bearing; 5. Moving impact tooth; 6. Static impact tooth; 7. First elastic member; 8. Adjusting assembly; 81. Torque cup; 82. Positioning ring; 83. Limit bead; 84. Torque adjusting ring; 85. Second elastic member; 86. Torque pressing plate; 9. Positioning assembly; 91. Snap ring; 92. Gear position spring piece; 10. Guide through hole; 11. Placing groove; 12. First limiting protrusion; 13. First limiting groove; 14. Second limiting protrusion; 15. Second limiting groove; 16. Positioning post; 17. Annular clamping groove; 18. Third limiting protrusion; 19. Third limiting groove; 20. Annular step; 21. Annular placing portion. Specific embodiments

[0025] The present utility model will be further described below in conjunction with the embodiments shown in the accompanying drawings:

[0026] As Figures 1 to 7 shown, this embodiment discloses an electric drill with an impact function, including a gearbox body 1. An output shaft 2 rotatably connected to the gearbox body 1 is provided inside the gearbox body 1. Both ends of the output shaft 2 are installed inside the gearbox body 1 through a limit ring 3 and a shifting bearing 4 respectively; a moving impact tooth 5 that rotates synchronously with the output shaft 2 is provided on the output shaft 2, a static impact tooth 6 is provided inside the gearbox body 1, and a first elastic member 7 for resetting is provided between the limit ring 3 and the static impact tooth 6; an adjusting assembly 8 rotatably connected to the outer layer of the gearbox body 1 is provided on the outer layer of the gearbox body 1. The adjusting assembly 8 includes a torque cup 81, a positioning ring 82, and a limit bead 83. The torque cup 81 and the positioning ring 82 are sleeved and installed on the outer layer of the gearbox body 1, and the positioning ring 82 rotates when the torque cup 81 rotates; the limit bead 83 is installed between the positioning ring 82 and the limit ring 3. A plurality of guide through holes 10 for installing the limit beads 83 are provided inside the gearbox body 1, and a plurality of placing grooves 11 for making way are provided on the positioning ring 82; when the placing grooves 11 and the guide through holes 10 are aligned, the limit ring 3 can push the limit beads 83 to move along the guide through holes 10.

[0027] The adjusting assembly 8 further includes a torsion adjusting ring 84, a second elastic member 85, and a torsion pressing plate 86; the torsion adjusting ring 84 is sleeved and installed on the outer side of the gearbox body 1 and is slidably connected thereto, and the torsion pressing plate 86 is sleeved and installed on the outer layer of the gearbox body 1 and abuts against the step of the gearbox body 1; an outer layer of the torsion adjusting ring 84 is provided with a torsion cup 81 threadedly connected thereto, and an open end of the gearbox body 1 is provided with a positioning assembly 9 for positioning the torsion cup 81; a plurality of uniformly distributed second elastic members 85 are provided between the torsion adjusting ring 84 and the torsion pressing plate 86; the positioning ring 82 is arranged inside the torsion cup 81 and is adjacent to the torsion adjusting ring 84; a plurality of uniformly distributed placing grooves 11 are provided inside the positioning ring 82, and a limiting bead 83 is arranged in each of the guiding through holes 10. One end of the positioning ring 82 facing away from the torsion adjusting ring 84 is provided with a plurality of first limiting protrusions 12 for limiting, and a plurality of first limiting grooves 13 are provided on the torsion cup 81, and the first limiting protrusions 12 are arranged in the first limiting grooves 13; when the torsion cup 81 rotates, the positioning ring 82 is driven to rotate, and when the positioning ring 82 rotates, the placing grooves 11 rotate relative to the guiding through holes 10. The outer layer of the gearbox body 1 is provided with a plurality of second limiting protrusions 14 for installing the torsion adjusting ring 84, and both the torsion adjusting ring 84 and the torsion pressing plate 86 are sleeved and installed on the second limiting protrusions 14; the torsion adjusting ring 84 is provided with a second limiting groove 15 for installing the second limiting protrusions 14; the end surface of the positioning ring 82 and the end surface of the second limiting protrusions 14 are adjacent to each other. The torsion adjusting ring 84 is provided with a plurality of positioning posts 16 for positioning, and the second elastic member 85 is sleeved and installed on the positioning posts 16; one end of the second elastic member 85 abuts against the torsion adjusting ring 84, and the other end abuts against the torsion pressing plate 86.

[0028] The positioning assembly 9 includes an open retaining ring 91 and a gear position elastic piece 92; the gearbox body 1 is provided with an annular clamping groove 17 for installing the positioning assembly 9, the annular clamping groove 17 is provided with the open retaining ring 91 and the gear position elastic piece 92, the gear position elastic piece 92 is in fit with the end surface of the torsion cup 81, and the open retaining ring 91 and the gear position elastic piece 92 are adjacent to each other. A plurality of uniformly distributed third limiting protrusions 18 are provided inside the gear position elastic piece 92, and a plurality of uniformly distributed third limiting grooves 19 are provided at the open end of the gearbox body 1; the third limiting protrusions 18 are arranged in the third limiting grooves 19, and the third limiting protrusions 18 extend along the radial direction of the output shaft 2.

[0029] The limiting ring 3 and the shifting bearing 4 are both deep groove ball bearings, and the output shaft 2 can move axially along the main body 1 of the gearbox during operation; an annular step 20 for installing the shifting bearing 4 is provided inside the main body 1 of the gearbox; the shifting bearing 4 is installed inside the static impact tooth 6, and the two are tightly fitted and connected; the static impact tooth 6 is tightly fitted and installed inside the main body 1 of the gearbox, and both the static impact tooth 6 and the shifting bearing 4 abut against the annular step 20; one end of the first elastic member 7 abuts against the limiting ring 3, and the other end abuts against the static impact tooth 6. The limiting ring 3 is tightly fitted and installed on the output shaft 2 and abuts against the step of the output shaft 2; a dynamic impact tooth 5 tightly fitted and connected to the output shaft 2 is further provided on the output shaft 2, and the dynamic impact tooth 5 and the limiting ring 3 are arranged in a fitting manner; the dynamic impact tooth 5 and the static gear teeth are arranged opposite to each other, and an annular placement portion 21 is provided on the limiting ring 3, and the contour of the annular placement portion 21 matches the contour of the limiting bead 83.

[0030] The specific operation process of this embodiment is as follows. By providing the adjustment assembly 8, it is convenient to adjust the position of the positioning ring 82, so as to conveniently adjust the positions of the guiding through hole 10 and the placement groove 11, so that the working gear of the electric drill can be conveniently switched. When the electric drill is in the drilling gear, rotate the torque cup 81 to make the placement groove 11 on the positioning ring 82 and the guiding through hole 10 misaligned. In this way, the limiting bead 83 cannot move outward along the guiding through hole 10 towards the outside of the main body 1 of the gearbox, and the limiting bead 83 can only contract inward along the guiding through hole 10 towards the inside of the main body 1 of the gearbox. In this way, the limiting bead 83 will abut against the limiting ring 3, and the limiting ring 3 cannot move axially relative to the main body 1 of the gearbox. Then the output shaft 2 cannot move axially, and the output shaft 2 can only rotate relative to the main body 1 of the gearbox. At this time, the electric drill does not have the impact function. When the electric drill is in the impact gear, rotate the torque cup 81 to align the placement groove 11 on the positioning ring 82 with the guiding through hole 10 of the main body 1 of the gearbox. The limiting bead 83 will have a moving space, and the limiting bead 83 will give way to the limiting ring 3; when the limiting ring 3 and the output shaft 2 move axially synchronously, the limiting bead 83 will move between the limiting ring 3 and the placement groove 11 along the guiding through hole 10. In this way, the electric drill can achieve the impact function.

[0031] When the torque cup 81 rotates to the impact gear, the placement groove 11 on the positioning ring 82 has been aligned with the guiding through hole 10 inside the main body 1 of the gearbox. When the output shaft 2 extends into the inside of the main body 1 of the gearbox, the limiting ring 3 on the output shaft 2 squeezes the limiting bead 83 into the placement groove 11 along the guiding through hole 10. Thus, the output shaft 2 can axially slide inside the main body 1 of the gearbox, and the dynamic impact tooth 5 on the output shaft 2 can mutually impact with the static impact tooth 6 inside the main body 1 of the gearbox, so as to achieve the impact effect. The dynamic impact tooth 5 and the static impact tooth 6 are always in a disengaged and engaged state, so that the output shaft 2 makes a forward and backward movement axially to impact an object.

[0032] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the art to which the present utility model pertains may make various modifications or supplements to the described specific embodiments or use similar means for substitution, but they will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.

Claims

1. An electric drill with impact function, comprising a gear box body (1), characterized in that: An output shaft (2) rotatably connected to the gearbox body (1) is provided inside the gearbox body (1), and both ends of the output shaft (2) are mounted inside the gearbox body (1) via a limit ring (3) and a shift bearing (4) respectively; a dynamic impact tooth (5) rotatably connected to the output shaft (2) is provided on the output shaft (2), and a static impact tooth (6) is provided inside the gearbox body (1); a first elastic member (7) for resetting is provided between the limit ring (3) and the static impact tooth (6); an adjustment assembly (8) rotatably connected to the gearbox body (1) is provided on the outer layer of the gearbox body (1), and the adjustment assembly (8) comprises a torque cup (81), a positioning ring (82) and a limit ring (83). The positioning bead (83), the torque cup (81) and the positioning ring (82) are sleeved and installed on the outer layer of the gear box body (1); when the torque cup (81) rotates, the positioning ring (82) is driven to rotate; the limiting bead (83) is installed between the positioning ring (82) and the limiting ring (3); a plurality of guide through holes (10) for installing the limiting bead (83) are provided in the gear box body (1); and a plurality of placement grooves (11) for making way are provided on the positioning ring (82); when the placement grooves (11) and the guide through holes (10) are aligned, the limiting ring (3) can push the limiting bead (83) to move along the guide through holes (10).

2. The electric drill with impact function according to claim 1, characterized in that: The adjustment assembly (8) further comprises a torque adjustment ring (84), a second elastic member (85) and a torque pressure plate (86); the torque adjustment ring (84) is sleeved and mounted on the outer side of the gear box body (1) and is slidably connected thereto; the torque pressure plate (86) is sleeved and mounted on the outer layer of the gear box body (1) and abuts against the step of the gear box body (1); the outer layer of the torque adjustment ring (84) is provided with a torque cup (81) threadedly connected thereto; the open end of the gear box body (1) is provided with a positioning assembly (9) for positioning the torque cup (81); a plurality of evenly distributed second elastic members (85) are provided between the torque adjustment ring (84) and the torque pressure plate (86); the positioning ring (82) is provided on the inner side of the torque cup (81) and is adjacent to the torque adjustment ring (84); a plurality of evenly distributed placement grooves (11) are provided on the inner side of the positioning ring (82), and a limiting bead (83) is provided in each of the guide through holes (10).

3. The electric drill with impact function according to claim 2, characterized in that: The end of the positioning ring (82) facing away from the torque adjustment ring (84) is provided with a plurality of first limiting protrusions (12) for limiting, and the torque cup (81) is provided with a plurality of first limiting grooves (13), wherein the first limiting protrusions (12) are arranged in the first limiting grooves (13); when the torque cup (81) rotates, the positioning ring (82) rotates with it, and when the positioning ring (82) rotates, the placement groove (11) rotates relative to the guide through hole (10).

4. The electric drill with impact function according to claim 2, characterized in that: The outer layer of the gearbox body (1) is provided with a plurality of second limiting protrusions (14) for mounting a torque adjustment ring (84); the torque adjustment ring (84) and the torque pressure plate (86) are both sleeved and mounted on the second limiting protrusions (14); the torque adjustment ring (84) is provided with a second limiting groove (15) for mounting the second limiting protrusion (14); and the end surface of the positioning ring (82) and the end surface of the second limiting protrusion (14) are arranged adjacent to each other.

5. The electric drill with impact function according to claim 3, characterized in that: The torque adjustment ring (84) is provided with a plurality of positioning posts (16) for positioning, and a second elastic member (85) is sleeved and mounted on the positioning posts (16); one end of the second elastic member (85) abuts against the torque adjustment ring (84), and the other end abuts against the torque pressure plate (86).

6. The electric drill with impact function according to claim 2, characterized in that: The positioning assembly (9) comprises an open retaining ring (91) and a gear spring piece (92); an annular retaining groove (17) for mounting the positioning assembly (9) is provided on the gear box body (1); an open retaining ring (91) and a gear spring piece (92) are provided in the annular retaining groove (17); the gear spring piece (92) and the end surface of the torque cup (81) are arranged in abutment with each other; and the open retaining ring (91) and the gear spring piece (92) are arranged adjacent to each other.

7. The electric drill with impact function according to claim 6, characterized in that: A plurality of evenly distributed third limiting protrusions (18) are provided on the inner side of the gear spring sheet (92), and a plurality of evenly distributed third limiting grooves (19) are provided on the open end of the gear box body (1); the third limiting protrusions (18) are arranged in the third limiting grooves (19), and the third limiting protrusions (18) extend along the radial direction of the output shaft (2).

8. The electric drill with impact function according to claim 1, characterized in that: The limiting ring (3) and the displacement bearing (4) are both deep groove ball bearings, and the output shaft (2) can move along the axial direction of the gearbox body (1) when working; an annular step (20) for mounting the displacement bearing (4) is provided in the gearbox body (1); the displacement bearing (4) is mounted in the static impact tooth (6), and the two are tightly fitted and connected; the static impact tooth (6) is tightly fitted in the gearbox body (1), and the static impact tooth (6) and the displacement bearing (4) both abut against the annular step (20); one end of the first elastic member (7) abuts against the limiting ring (3), and the other end abuts against the static impact tooth (6).

9. The electric drill with impact function according to claim 8, characterized in that: The limiting ring (3) is tightly mounted on the output shaft (2) and abuts against the step of the output shaft (2); the output shaft (2) is also provided with a dynamic impact tooth (5) tightly connected thereto, the dynamic impact tooth (5) and the limiting ring (3) are arranged in close contact; the dynamic impact tooth (5) and the stationary gear tooth are arranged opposite to each other, the limiting ring (3) is provided with an annular placement portion (21), and the contour of the annular placement portion (21) and the contour of the limiting bead (83) match each other.

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