Adjustable impact type screwdriver
Through the current adjustment method and limit component design, the problems of cumbersome torque adjustment and limited range of the driver are solved, high-precision, rapid torque adjustment and gear switching are achieved, and the versatility and safety of the driver are improved.
Patent Information
- Application Number
- CN202422015991.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-20
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-08-20
AI Technical Summary
The torque adjustment of existing drivers is cumbersome and has limited scope, and the mechanical adjustment method is poor in versatility, making it difficult to meet the needs of various working conditions.
The current adjustment method is adopted, and the conductive plate fixing ring is driven to rotate through the torsion cup. The conductive plate contacts the copper contact plate on the gear circuit board to generate different currents, thereby adjusting the torque magnitude, and combining the limit beads and positioning components to achieve gear switching.
It achieves high accuracy, fast response speed, wide application range, and convenient switching of drilling gears and impact gears, which is safe and reliable to use.
Smart Images
Figure CN223057613U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of screwdrivers, and particularly relates to an adjustable impact screwdriver. Background Art
[0002] With the development of machining technology, more and more jobs require the use of screwdrivers. And the torque of a screwdriver is one of the important parameters affecting its performance. Therefore, torque adjustment is particularly important. Generally, the existing screwdrivers usually adopt mechanical adjustment methods to adjust torque. Mechanical adjustment is to adjust the transmission structure of the screwdriver to achieve the purpose of torque adjustment. Usually, the torque of a screwdriver is adjusted by a spring. When the spring tension increases, the torque of the screwdriver will also increase accordingly. Then, by increasing or decreasing the spring tension, the torque size of the screwdriver can be adjusted. However, products with mechanical torque adjustment often need to undergo professional technical calibration during factory production, and the calibration process is rather cumbersome. At the same time, limited by the mechanical transmission structure, the torque adjustment range is also limited and the versatility is poor. Therefore, it is necessary to design an adjustable impact screwdriver 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 adjustable impact screwdriver. In the gearbox main body of the utility model, a torque cup is arranged. The torque cup drives the conductive plate fixing ring to rotate. The conductive plate fixing ring and the gear position circuit board are arranged adjacent to each other. When the conductive plate body contacts the copper contacts of different gears, different output currents are generated, so that the torque can be conveniently adjusted. The adjustment accuracy is high and the response speed is fast.
[0004] The invention object of the utility model is realized by the following technical solutions: an adjustable impact screwdriver, comprising a gearbox main body, and an output shaft assembly rotatably connected to the gearbox main body; a torque cup rotatably connected to the outside of the gearbox main body, a positioning ring, a conductive plate fixing ring and a gear position circuit board are sequentially sleeved and installed on the gearbox main body; both the positioning ring and the conductive plate fixing ring are rotatably connected to the gearbox main body, and when the torque cup rotates, it synchronously drives the positioning ring and the conductive plate fixing ring to rotate; a limiting bead capable of radially moving relative to the gearbox main body is arranged in the gearbox main body, a placing groove for placing the limiting bead is arranged on the positioning ring, and when the placing groove and the limiting bead are aligned by rotating the positioning ring, the limiting bead can radially move relative to the output shaft assembly; a positioning assembly is arranged at the open end of the gearbox main body.
[0005] Preferably, both the positioning ring and the conductive plate fixing ring are sleeved and installed on the main body of the gearbox, and the two are arranged adjacent to each other; the torque cup is sleeved and installed on the outer layer of the positioning ring and the conductive plate fixing ring, and the end face of the torque cup abuts against the end face of the positioning ring; the gear position circuit board is sleeved and installed on the main body of the gearbox, and the gear position circuit board and the conductive plate fixing ring are arranged adjacent to each other; the conductive plate fixing ring is provided with a conductive plate body for conducting an electric circuit, and the gear position circuit board is provided with a plurality of uniformly distributed copper contacts. When the conductive plate body contacts the copper contacts, the gear position circuit board is turned on, and when each copper contact is turned on, it corresponds to an output current of the gear position circuit board.
[0006] When the torque cup rotates, it drives the conductive plate fixing ring to rotate. Every time the conductive plate fixing ring rotates a certain angle, the conductive plate body will contact the copper contacts on the gear position circuit board, and then the gear position circuit board will be in a conductive state. Each copper contact on the gear position circuit board corresponds to an output current of the gear position circuit board. If the output currents of the gear position circuit board are different, the torque values generated by the output shaft assembly will be different. Every time the torque cup rotates, it will cause the conductive plate fixing ring to rotate a certain angle, thereby changing the output current of the gear position circuit board. That is to say, the gear position can be conveniently switched through the torque cup each time, so that the output shaft assembly generates different torque values, with a fast response speed and good versatility.
[0007] Preferably, the main body of the gearbox is provided with a first annular step, and the gear position circuit board abuts against the first annular step; the first annular step is provided with a plurality of uniformly distributed first protrusions, and the gear position circuit board is provided with a plurality of uniformly distributed first grooves. The first protrusions are arranged in the first grooves, and the gear position circuit board is tightly and fixedly connected with the first protrusions; the main body of the gearbox is provided with a plurality of uniformly distributed guiding grooves along the axial direction of the first annular step. The gear position circuit board is in a disc shape, and the inner ring of the gear position circuit board is provided with an outward protrusion, and the outward protrusion is arranged in the guiding grooves, and the outer contour of the outward protrusion matches the outer contour of the guiding grooves.
[0008] By providing the first annular step, it is convenient to limit the gear position circuit board. Through the first protrusions and the first grooves, it is convenient to tightly and fixedly install the gear position circuit board on the main body of the gearbox; by providing the guiding grooves and the outward protrusions, the gear position circuit board is further positioned, so as to ensure that the copper contacts can be contacted and conducted by the conductive plate body on the conductive plate fixing ring.
[0009] Preferably, a positioning ring and a conductive plate fixing ring are sequentially sleeved and installed on the main body of the gearbox; the conductive plate fixing ring abuts against the end face of the first protrusion; an installation groove is arranged inside the conductive plate fixing ring, and the end face of the positioning ring abuts against the installation groove.
[0010] By providing an installation groove, it is convenient to install the positioning ring onto the conductive plate fixing ring, and axially and radially position the positioning ring. The conductive plate fixing ring is abutted against the end face of the first protrusion, so as to axially limit the conductive plate fixing ring.
[0011] Preferably, a torsion cup is sleeved and installed on the outer layers of the positioning ring and the conductive plate fixing ring; the flat inner wall of the torsion cup is attached to the end face of the positioning ring, and the outer wall of the torsion cup is attached to the positioning component; a number of uniformly distributed limiting through holes are provided on the torsion cup, a number of uniformly distributed second protrusions are provided at the end of the positioning ring facing the torsion cup, and the second protrusions are arranged in the limiting through holes; a number of uniformly distributed limiting grooves are provided on the outer ring of the conductive plate fixing ring, and a number of uniformly distributed limiting protrusions are provided on the inner wall of the torsion cup, and the limiting protrusions are arranged in the limiting grooves.
[0012] Through the mutual cooperation of the limiting through holes and the second protrusions, when the torsion cup rotates, it can drive the positioning ring to rotate, thus facilitating the adjustment of the moving stroke of the limiting beads. Through the mutual cooperation of the limiting grooves and the limiting protrusions, when the torsion cup rotates, it can drive the conductive plate fixing ring to rotate, thus facilitating the adjustment of the relative position relationship between the conductive plate body and the copper contact.
[0013] Preferably, an annular groove for installing the positioning component is provided at the open end of the gearbox body; the positioning component includes a gear shift spring piece and an open snap ring, and the gear shift spring piece can generate elastic deformation; the gear shift spring piece is sleeved and installed in the annular groove and abutted against the end face of the torsion cup, and the open snap ring is sleeved and installed in the annular groove and abutted against the end face of the gear shift spring piece.
[0014] By providing the gear shift spring piece and the open snap ring, it is convenient to axially limit the torsion cup and prevent the torsion cup from detaching from the gearbox body. At the same time, the gear shift spring piece has elasticity, so the gear shift spring piece can squeeze and contact the torsion cup, and the torsion cup is always in a squeezed state and can be maintained at the corresponding gear after rotation. Each time the gear is switched, the conductive plate body can also be stuck on the copper contact to maintain at the corresponding gear. The conductive plate body is a metal elastic part and can generate elastic deformation.
[0015] Preferably, the output shaft assembly includes an output shaft body, a limiting ring and a shifting bearing; a static impact tooth tightly fitted with the gearbox body is provided inside the gearbox body, the static impact tooth is sleeved and installed on the outer layer of the shifting bearing and the two are tightly fitted; one end of the output shaft body is installed on the shifting bearing, and the other end is installed on the limiting ring; a dynamic impact tooth tightly fitted with the output shaft body is provided on the output shaft body, the dynamic impact tooth abuts against the limiting ring, and a first elastic part is provided between the limiting ring and the static impact tooth; a guiding through hole for installing the limiting beads is provided inside the gearbox body, and when the guiding through hole is aligned with the placing groove, the output shaft body can axially move relative to the gearbox body.
[0016] The screwdriver machine has two modes: drilling mode and impact mode, which can be switched freely. When the drilling mode is needed, rotate the torque cup to synchronously rotate the positioning ring, and misalign the placement groove on the positioning ring and the guiding through hole in the gearbox body. In this way, the inner wall of the positioning ring blocks the limiting beads from moving outward along the guiding through hole towards the outside of the gearbox body. Then the limiting beads can only abut against the limiting ring of the output shaft body. At this time, the output shaft body cannot move axially relative to the gearbox body, and the moving impact teeth cannot approach the static impact teeth to form a counter impact. The screwdriver machine does not have an impact function and only has a rotating function. When the impact function is needed, rotate the torque cup to the impact mode, so that the placement groove on the positioning ring and the guiding through hole in the gearbox body are aligned with each other. Then the moving stroke of the limiting beads increases, and the placement groove gives way to the limiting beads. When the output shaft body contracts towards the inside of the gearbox body, the limiting ring will squeeze the limiting beads, so that the limiting beads move outward along the guiding through hole. Then the output shaft body can reciprocally expand and contract along the axial direction of the gearbox body. The moving impact teeth on the output shaft body and the static impact teeth in the gearbox body will counter impact each other, thus achieving the impact effect. By setting the first elastic member, the output shaft body can automatically reset, so as to continuously maintain the impact state.
[0017] Preferably, both the limiting ring and the shifting bearing are deep groove ball bearings, and the output shaft body can move axially when installed on the limiting ring and the shifting bearing; an annular placement portion is provided on the limiting ring, the annular placement portion is rounded, and the outer contour of the annular placement portion matches the outer contour of the limiting beads; the gearbox body is provided with a second annular step for installing the static impact teeth, and both the static impact teeth and the shifting bearing are abutted and installed on the second annular step. By setting the annular placement portion, it is convenient for the limiting ring to push the limiting beads to move more smoothly, avoiding the limiting beads from jamming the limiting ring.
[0018] Preferably, the end face of the limiting ring abuts against the step of the output shaft body; a positioning component is provided at the open end of the gearbox body, the positioning component includes a gear position elastic piece, and the end face of the limiting ring and the gear position elastic piece are arranged adjacent to each other; the static impact teeth and the moving impact teeth are coaxial and oppositely arranged, and the static impact teeth and the moving impact teeth counter impact each other when the output shaft body moves axially. By setting the gear position elastic piece, the output shaft body is further limited, and the output shaft body is safer and more reliable when rotating.
[0019] Compared with the prior art, the utility model has the following beneficial effects: 1. By controlling the current magnitude, the utility model realizes the adjustment of torque. This method has the advantages of high precision and rapid response, and has a wide range of applications. Rotating the torque cup can drive the conductive plate fixing ring to rotate, so that the conductive plate body can contact different copper contacts on the gear position circuit board, thereby outputting different currents, and the structure is simple and reliable. 2. The utility model has two types of dies, namely the drilling gear position and the impact gear position, and the gear position can be conveniently switched through the torque cup, and the versatility is better. 3. The torque cup is maintained at the corresponding working gear position through the positioning component, and the use is safe and reliable. Description of the Drawings
[0020] Figure 1 is a perspective view of the present embodiment;
[0021] Figure 2 is an internal structure diagram of the utility model;
[0022] Figure 3 is an exploded view of the utility model;
[0023] Figure 4 is an exploded view of the utility model from another perspective;
[0024] Figure 5 is a perspective view of the gearbox main body;
[0025] Figure 6 is a perspective view of the conductive plate fixing ring;
[0026] Figure 7 is a perspective view of the gear position circuit board;
[0027] Figure 8 is a perspective view of the torque cup;
[0028] Reference numerals in the drawings: 1. Gearbox main body; 2. Output shaft assembly; 21. Output shaft body; 22. Limiting ring; 23. Shifting bearing; 24. Static impact tooth; 25. Dynamic impact tooth; 26. First elastic member; 27. Annular placement portion; 3. Torque cup; 31. Limiting through hole; 32. Limiting protrusion; 4. Positioning ring; 41. Placement groove; 42. Second protrusion; 5. Conductive plate fixing ring; 51. Conductive plate body; 52. Installation groove; 53. Limiting groove; 6. Gear position circuit board; 61. Copper contact; 62. First groove; 63. Outer convex portion; 7. Limiting bead; 8. Positioning component; 81. Gear position spring piece; 82. Snap ring; 9. First annular step; 10. First protrusion; 11. Guide groove; 12. Annular groove; 13. Guide through hole; 14. Second annular step. Detailed Embodiment
[0029] The following further describes the utility model in conjunction with the embodiments shown in the drawings:
[0030] As Figures 1 to 8 shown, this embodiment discloses an adjustable impact screwdriver, which includes a gearbox main body 1, and an output shaft assembly 2 rotatably connected thereto is provided inside the gearbox main body 1; a torque cup 3 rotatably connected to the outside of the gearbox main body 1 is provided, and a positioning ring 4, a conductive plate fixing ring 5 and a gear position circuit board 6 are sequentially sleeved and installed on the gearbox main body 1; both the positioning ring 4 and the conductive plate fixing ring 5 are rotatably connected to the gearbox main body 1, and when the torque cup 3 rotates, it synchronously drives the positioning ring 4 and the conductive plate fixing ring 5 to rotate; a limit bead 7 capable of radially moving relative to the gearbox main body 1 is provided inside the gearbox main body 1, and a placement groove 41 for placing the limit bead 7 is provided on the positioning ring 4. When the placement groove 41 and the limit bead 7 are aligned by rotating the positioning ring 4, the limit bead 7 can radially move relative to the output shaft assembly 2; a positioning assembly 8 is provided at the open end of the gearbox main body 1.
[0031] The positioning ring 4 and the conductive plate fixing ring 5 are both sleeved and installed on the gearbox body 1, and the two are arranged adjacent to each other; the torsion cup 3 is sleeved and installed on the outer layer of the positioning ring 4 and the conductive plate fixing ring 5, and the end face of the torsion cup 3 abuts against the end face of the positioning ring 4; the gear position circuit board 6 is sleeved and installed on the gearbox body 1, and the gear position circuit board 6 and the conductive plate fixing ring 5 are arranged adjacent to each other; the conductive plate fixing ring 5 is provided with a conductive plate body 51 for conducting the circuit, and the gear position circuit board 6 is provided with a plurality of uniformly distributed copper contact pieces 61. When the conductive plate body 51 contacts the copper contact pieces 61, the gear position circuit board 6 is conducted, and each copper contact piece 61 corresponds to an output current of the gear position circuit board 6 when it is conducted. The gearbox body 1 is provided with a first annular step 9, and the gear position circuit board 6 abuts against the first annular step 9; the first annular step 9 is provided with a plurality of uniformly distributed first protrusions 10, and the gear position circuit board 6 is provided with a plurality of uniformly distributed first grooves 62. The first protrusions 10 are arranged in the first grooves 62, and the gear position circuit board 6 and the first protrusions 10 are tightly fitted and connected; the gearbox body 1 is provided with a plurality of uniformly distributed guiding grooves 11 along the axial direction of the first annular step 9. The gear position circuit board 6 is in a disc shape, and the inner ring of the gear position circuit board 6 is provided with an outward protrusion 63. The outward protrusion 63 is arranged in the guiding grooves 11, and the outer contour of the outward protrusion 63 matches the outer contour of the guiding grooves 11. The positioning ring 4 and the conductive plate fixing ring 5 are sequentially sleeved and installed on the gearbox body 1; the conductive plate fixing ring 5 abuts against the end face of the first protrusion 10; the conductive plate fixing ring 5 is internally provided with an installation groove 52, and the end face of the positioning ring 4 abuts against the installation groove 52. The positioning ring 4 and the conductive plate fixing ring 5 are sleeved and installed with the torsion cup 3 on the outer layer; the flat inner wall of the torsion cup 3 is attached to the end face of the positioning ring 4, and the outer wall of the torsion cup 3 is attached to the positioning assembly 8; the torsion cup 3 is provided with a plurality of uniformly distributed limiting through holes 31, and the end of the positioning ring 4 facing the torsion cup 3 is provided with a plurality of uniformly distributed second protrusions 42. The second protrusions 42 are arranged in the limiting through holes 31; the outer ring of the conductive plate fixing ring 5 is provided with a plurality of uniformly distributed limiting grooves 53, and the inner wall of the torsion cup 3 is provided with a plurality of uniformly distributed limiting protrusions 32. The limiting protrusions 32 are arranged in the limiting grooves 53. The open end of the gearbox body 1 is provided with an annular groove 12 for installing the positioning assembly 8; the positioning assembly 8 includes a gear position spring piece 81 and an open snap ring 82, and the gear position spring piece 81 can generate elastic deformation; the gear position spring piece 81 is sleeved and installed in the annular groove 12 and abuts against the end face of the torsion cup 3, and the open snap ring 82 is sleeved and installed in the annular groove 12 and abuts against the end face of the gear position spring piece 81.
[0032] The output shaft assembly 2 includes an output shaft body 21, a limit ring 22, and a shift bearing 23; a static impact tooth 24 tightly fitted and connected to the gearbox body 1 is provided inside the gearbox body 1, and the static impact tooth 24 is sleeved and installed on the outer layer of the shift bearing 23 and the two are tightly fitted and connected; one end of the output shaft body 21 is mounted on the shift bearing 23, and the other end is mounted on the limit ring 22; a dynamic impact tooth 25 tightly fitted and connected to the output shaft body 21 is provided on the output shaft body 21, and the dynamic impact tooth 25 abuts against the limit ring 22, and a first elastic member 26 is provided between the limit ring 22 and the static impact tooth 24; a guiding through hole 13 for installing a limit bead 7 is provided inside the gearbox body 1, and when the guiding through hole 13 is aligned with the placing groove 41, the output shaft body 21 can axially move relative to the gearbox body 1. Both the limit ring 22 and the shift bearing 23 are deep groove ball bearings, and the output shaft body 21 can axially move when mounted on the limit ring 22 and the shift bearing 23; a circular placing portion 27 is provided on the limit ring 22, the circular placing portion 27 is a fillet, and the outer contour of the circular placing portion 27 matches the outer contour of the limit bead 7; the gearbox body 1 is provided with a second annular step 14 for installing the static impact tooth 24, and both the static impact tooth 24 and the shift bearing 23 are abutted and installed on the second annular step 14. The end face of the limit ring 22 abuts against the step of the output shaft body 21; a positioning assembly 8 is provided at the open end of the gearbox body 1, and the positioning assembly 8 includes a gear position spring piece 81, and the end face of the limit ring 22 and the gear position spring piece 81 are adjacent to each other; the static impact tooth 24 and the dynamic impact tooth 25 are coaxial and oppositely arranged, and when the output shaft body 21 axially moves, the static impact tooth 24 and the dynamic impact tooth 25 move against each other.
[0033] The specific operation process of this embodiment is as follows. When the torque cup 3 rotates, it drives the conductive plate fixing ring 5 to rotate. Each time the conductive plate fixing ring 5 rotates a certain angle, the conductive plate body 51 will contact the copper contact 61 on the gear position circuit board 6, and then the gear position circuit board 6 will be in a conducting state. Each copper contact 61 on the gear position circuit board 6 corresponds to an output current of the gear position circuit board 6. If the output currents of the gear position circuit board 6 are different, the torque values generated by the output shaft assembly 2 will be different. Each time the torque cup 3 rotates, it will cause the conductive plate fixing ring 5 to rotate a certain angle, thereby changing the output current of the gear position circuit board 6. That is to say, the gear position can be conveniently switched each time through the torque cup 3, so that the output shaft assembly 2 generates different torque values, with fast response speed and good versatility.
[0034] The screwdriver has two modes, namely the drilling mode and the impact mode, which can be switched at will. When the drilling mode is needed, rotate the torque cup 3 to synchronously rotate the positioning ring 4, and misalign the placement groove 41 on the positioning ring 4 and the guiding through hole 13 in the gearbox body 1. In this way, the inner wall of the positioning ring 4 blocks the limiting bead 7 from moving outward along the guiding through hole 13 towards the outside of the gearbox body 1. Then the limiting bead 7 can only abut against the limiting ring 22 of the output shaft body 2. At this time, the output shaft body 21 cannot move axially relative to the gearbox body 1, and the moving impact tooth 25 cannot approach the static impact tooth 24 to form a counter impact. The screwdriver does not have an impact function and only has a rotating function. When the impact function is needed, rotate the torque cup 3 to the impact gear position, so that the placement groove 41 on the positioning ring 4 and the guiding through hole 13 in the gearbox body 1 are aligned with each other. Then the moving stroke of the limiting bead 7 increases, and the placement groove 41 gives way to the limiting bead 7. When the output shaft body 21 contracts towards the inside of the gearbox body 1, the limiting ring 22 will squeeze the limiting bead 7, so that the limiting bead 7 moves outward along the guiding through hole 13. Then the output shaft body 21 can reciprocally expand and contract axially along the gearbox body 1. The moving impact tooth 25 on the output shaft body 21 and the static impact tooth 24 in the gearbox body 1 will counter impact each other, so as to achieve the impact effect. By setting the first elastic member 26, the output shaft body 21 can automatically reset, so as to continuously maintain the impact state.
[0035] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.
Claims
1. An adjustable impact screwdriver, comprising a gearbox body (1), characterized in that, An output shaft assembly (2) rotatably connected thereto is provided inside the gearbox main body (1); a torsion cup (3) rotatably connected thereto is provided outside the gearbox main body (1), and a positioning ring (4), a conductive plate fixing ring (5) and a gear position circuit board (6) are sequentially sleeved and installed on the gearbox main body (1); both the positioning ring (4) and the conductive plate fixing ring (5) are rotatably connected to the gearbox main body (1), and when the torsion cup (3) rotates, it synchronously drives the positioning ring (4) and the conductive plate fixing ring (5) to rotate; a limiting bead (7) capable of radially moving relative thereto is provided inside the gearbox main body (1), a placing groove (41) for placing the limiting bead (7) is provided on the positioning ring (4), and when the placing groove (41) and the limiting bead (7) are aligned by rotating the positioning ring (4), the limiting bead (7) can radially move relative to the output shaft assembly (2); a positioning component (8) is provided at the open end of the gearbox main body (1).
2. The adjustable impact screwdriver according to claim 1, characterized in that, Both the positioning ring (4) and the conductive plate fixing ring (5) are sleeved and installed on the gearbox main body (1) and are adjacent to each other; the torsion cup (3) is sleeved and installed on the outer layer of the positioning ring (4) and the conductive plate fixing ring (5), and the end face of the torsion cup (3) abuts against the end face of the positioning ring (4); the gear position circuit board (6) is sleeved and installed on the gearbox main body (1) and is adjacent to the conductive plate fixing ring (5); a conductive plate body (51) for conducting an electric circuit is provided on the conductive plate fixing ring (5), a plurality of uniformly distributed copper contact pieces (61) are provided on the gear position circuit board (6), and when the conductive plate body (51) contacts the copper contact pieces (61), the gear position circuit board (6) is conducted, and each time a copper contact piece (61) is conducted, it corresponds to an output current of the gear position circuit board (6).
3. The adjustable impact screwdriver according to claim 2, wherein A first annular step (9) is provided on the gearbox main body (1), and the gear position circuit board (6) abuts against the first annular step (9); a plurality of uniformly distributed first protrusions (10) are provided on the first annular step (9), a plurality of uniformly distributed first grooves (62) are provided on the gear position circuit board (6), the first protrusions (10) are arranged in the first grooves (62), and the gear position circuit board (6) is tightly and fixedly connected to the first protrusions (10); a plurality of uniformly distributed guiding grooves (11) are axially provided on the gearbox main body (1) along the first annular step (9), the gear position circuit board (6) is in a disc shape, and an outer convex portion (63) is provided on the inner ring of the gear position circuit board (6), and the outer convex portion (63) is arranged in the guiding grooves (11), and the outer contour of the outer convex portion (63) matches the outer contour of the guiding grooves (11).
4. The adjustable impact screwdriver according to claim 3, characterized in that, A positioning ring (4) and a conductive plate fixing ring (5) are sequentially sleeved and installed on the gearbox main body (1); the conductive plate fixing ring (5) abuts against the end face of the first protrusion (10); an installation groove (52) is provided inside the conductive plate fixing ring (5), and the end face of the positioning ring (4) abuts against the installation groove (52).
5. The adjustable impact screwdriver according to claim 4, characterized in that, A torsion cup (3) is sleeved and installed on the outer layer of the positioning ring (4) and the conductive plate fixing ring (5); the flat inner wall of the torsion cup (3) is attached to the end face of the positioning ring (4), and the outer wall of the torsion cup (3) is attached to the positioning component (8); a number of uniformly distributed limiting through holes (31) are provided on the torsion cup (3), and a number of uniformly distributed second protrusions (42) are provided at the end of the positioning ring (4) facing the torsion cup (3), and the second protrusions (42) are arranged in the limiting through holes (31); a number of uniformly distributed limiting grooves (53) are provided on the outer ring of the conductive plate fixing ring (5), and a number of uniformly distributed limiting protrusions (32) are provided on the inner wall of the torsion cup (3), and the limiting protrusions (32) are arranged in the limiting grooves (53).
6. The adjustable impact screwdriver according to claim 1, characterized in that, An annular groove (12) for installing the positioning component (8) is provided at the open end of the gearbox main body (1); the positioning component (8) includes a gear position elastic piece (81) and an open snap ring (82), and the gear position elastic piece (81) can generate elastic deformation; the gear position elastic piece (81) is sleeved and installed in the annular groove (12) and abuts against the end face of the torsion cup (3), and the open snap ring (82) is sleeved and installed in the annular groove (12) and abuts against the end face of the gear position elastic piece (81).
7. The adjustable impact screwdriver according to claim 1, characterized in that, The output shaft assembly (2) includes an output shaft body (21), a limiting ring (22) and a shifting bearing (23); a static impact tooth (24) tightly fitted with the gearbox main body (1) is provided in the gearbox main body (1), and the static impact tooth (24) is sleeved and installed on the outer layer of the shifting bearing (23) and the two are tightly fitted; one end of the output shaft body (21) is installed on the shifting bearing (23), and the other end is installed on the limiting ring (22); a dynamic impact tooth (25) tightly fitted with the output shaft body (21) is provided on the output shaft body (21), and the dynamic impact tooth (25) abuts against the limiting ring (22), and a first elastic member (26) is provided between the limiting ring (22) and the static impact tooth (24); a guiding through hole (13) for installing the limiting bead (7) is provided in the gearbox main body (1), and the output shaft body (21) can axially move relative to the gearbox main body (1) when the guiding through hole (13) is aligned with the placing groove (41).
8. The adjustable impact screwdriver according to claim 7, characterized in that, Both the limiting ring (22) and the shifting bearing (23) are deep groove ball bearings, and the output shaft body (21) can axially move when installed on the limiting ring (22) and the shifting bearing (23); an annular placing portion (27) is provided on the limiting ring (22), the annular placing portion (27) is a fillet, and the outer contour of the annular placing portion (27) matches the outer contour of the limiting bead (7); the gearbox main body (1) is provided with a second annular step (14) for installing the static impact tooth (24), and both the static impact tooth (24) and the shifting bearing (23) are abutted and installed on the second annular step (14).
9. The adjustable impact screwdriver according to claim 7, characterized in that, The end face of the limiting ring (22) abuts against the step of the output shaft body (21); a positioning component (8) is provided at the open end of the gearbox body (1), and the positioning component (8) includes a gear position elastic piece (81), and the end face of the limiting ring (22) is arranged adjacent to the gear position elastic piece (81); the static impact tooth (24) and the dynamic impact tooth (25) are coaxially arranged and oppositely arranged, and when the output shaft body (21) axially moves, the static impact tooth (24) and the dynamic impact tooth (25) move against each other.