Multifunctional impact drill

Abstract

The present invention provides a multifunctional impact drill, comprising: a motor, a housing assembly for supporting the motor; an output shaft, which can be driven by the motor to rotate around a first axis; a transmission assembly, comprising a locking ring that can rotate relative to the housing assembly; the multifunctional impact drill also comprises: a plurality of jump pins, which are connected to the locking ring to limit the rotation of the locking ring; an annular gasket, which is connected to the plurality of jump pins; a biasing element, which is connected to the annular gasket, and the biasing element provides a biasing force that causes the jump pins to press the locking ring; a function conversion member, which can be rotated to a first position and a second position, and when the function conversion member is in the first position, the movement of the jump pin relative to the housing assembly in the direction of the first axis is limited, and when the function conversion member is in the second position, the jump pin can move relative to the housing assembly along the direction of the first axis. The multifunctional impact drill provided by the present invention has a compact structure and reliable functions.

Description

Technical Field

[0001] The invention relates to an electric tool, in particular to a multifunctional impact drill. Background Art

[0002] A multifunctional impact drill is used to provide torque to assist users in daily operations. It has a torque adjustment device for adjusting the output torque of the multifunctional impact drill. The torque adjustment device in existing products has a complex structure and a large size, which is not conducive to size reduction of the multifunctional impact drill. In addition, the existing torque adjustment structure is relatively unreliable and easily causes the torque adjustment function to be out of adjustment. Summary of the invention

[0003] The main purpose of the present invention is to provide a multifunctional impact drill with compact structure and reliable function.

[0004] In order to achieve the above main objectives, the present invention provides a multifunctional impact drill, including: a motor, a housing assembly for supporting the motor; an output shaft, which can be driven by the motor to rotate around a first axis; a transmission assembly, including a locking ring that can rotate relative to the housing assembly; the multifunctional impact drill also includes: a plurality of jump pins, connected to the locking ring to limit the rotation of the locking ring; an annular gasket, connected to the plurality of jump pins; a biasing element, connected to the annular gasket, the biasing element provides a biasing force that causes the jump pin to press the locking ring; a functional conversion part, the functional conversion part can be rotated to a first position and a second position, when the functional conversion part is in the first position, the movement of the jump pin relative to the housing assembly in the direction of the first axis is restricted, and when the functional conversion part is in the second position, the jump pin can move relative to the housing assembly along the direction of the first axis.

[0005] Optionally, the function conversion component includes a stop portion that limits the movement of the jump pin in the direction of the first axis, and a release portion that allows the jump pin to move along the first axis. When the stop portion abuts the jump pin, the multi-function impact drill is switched to the hammer gear or the drill gear, and when the jump pin is aligned with the release portion in the direction of the first axis, the multi-function impact drill is switched to the screw gear.

[0006] Optionally, the multifunctional impact drill also includes an operating member connected to a function conversion member; an impact assembly, the impact assembly including: a fixed impact mechanism, at least a portion of which is fixedly connected to the housing assembly, a dynamic impact mechanism, the dynamic impact mechanism being able to move along the direction of the first axis with the output shaft, an operating member connected to the dynamic impact mechanism, the operating member having a first state allowing the dynamic impact mechanism to move in the axial direction of the first axis, and a second state restricting the dynamic impact mechanism from moving in the axial direction of the first axis.

[0007] Optionally, when the operating member drives the function conversion member to rotate to the first position, the operating member can be switched to the first state or the second state, so that the multi-functional impact drill is switched to the hammer gear or the drill gear respectively. When the operating member drives the function conversion member to rotate to the second position, the operating member can be switched to the second state, so that the multi-functional impact drill is switched to the screw gear.

[0008] Optionally, the dynamic impact mechanism forms a support leg and a fixed impact mechanism matching portion, and the dynamic impact mechanism can be driven by the operating member to rotate around the first axis so that the matching portion and the support leg are aligned or staggered in the axial direction of the first axis.

[0009] Optionally, the matching portion is a boss or a groove formed on the fixed impact mechanism.

[0010] Optionally, the impact assembly also includes a bushing, which is sleeved on the outside of the dynamic impact mechanism and the fixed impact mechanism, the dynamic impact mechanism forms a support leg, the dynamic impact mechanism can be driven by the operating member to rotate around the first axis, and the bushing forms a groove that cooperates with the support leg.

[0011] Optionally, the multifunctional impact drill includes: an operating member connected to a function conversion member; the operating member is a rotating cylinder sleeved on the shell assembly, and the operating member can be operated to move around a first axis to switch the state of the operating member and the position of the function conversion member.

[0012] Optionally, the function conversion member is a gasket, and an opening is formed in the middle of the gasket for the shift jump pin to pass through.

[0013] Optionally, the transmission assembly includes a planetary gear set and a gearbox, the planetary gear set includes: planetary wheels, a sun wheel and a planetary wheel carrier, the planetary wheel carrier is used to install the planetary wheels, the planetary wheels are meshed with the sun wheel, and the locking ring includes meshing teeth meshed with the planetary wheels, and locking teeth abutting against the jump pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the multifunctional impact drill according to the first embodiment of the present invention.

[0015] Figure 2 for Figure 1 A schematic diagram of the structure of the transmission component and the impact component of the multi-functional impact drill.

[0016] Figure 3 for Figure 1 A cross-sectional view of the transmission assembly and the impact assembly of the multi-functional impact drill.

[0017] Figure 4 for Figure 1 An exploded schematic diagram of the transmission assembly of the multi-functional impact drill.

[0018] Figure 5 for Figure 1Schematic diagram of the structure of the function conversion part of the multi-functional impact drill.

[0019] Figure 6 for Figure 1 A structural schematic diagram of a multifunctional impact drill when the function conversion part is located in the first position.

[0020] Figure 7 for Figure 1 A structural schematic diagram of a multifunctional impact drill when the function conversion part is located in the second position.

[0021] Figure 8 for Figure 1 A schematic structural diagram of the impact assembly when the operating part of the multifunctional impact drill is in the first state.

[0022] Fig. 9 for Figure 1 A schematic structural diagram of the impact assembly when the operating part of the multifunctional impact drill is in the second state.

[0023] Fig.10 for Figure 1 Schematic diagram of the explosion of the impact assembly of the multi-functional impact drill.

[0024] Fig.11 Schematic diagram of the internal structure of a multifunctional impact drill according to the second embodiment of the present invention.

[0025] Fig.12 This is a schematic diagram of the internal structure of the multifunctional impact drill according to the second embodiment of the present invention from another angle. DETAILED DESCRIPTION

[0026] The present invention is described in detail below with reference to the accompanying drawings and specific implementation methods.

[0027] Reference Figure 1 The present invention provides a multifunctional impact drill 100, which can at least provide torque to assist screws in driving into workpieces, and can provide impact force for impact operations. The impact function of the multifunctional impact drill 100 can be operated to start or stop, so that the multifunctional impact drill 100 can be switched to screw gear, hammer gear and drill gear to meet the different usage requirements of users.

[0028] Reference Figure 2 and Figure 3The multifunctional impact drill 100 includes a motor, a housing assembly 120, an output shaft 110 and an impact assembly 200. The motor is arranged in the housing assembly 120 and supported by the housing assembly 120. The motor can drive the output shaft 110 to rotate around the first axis 101. A working head is provided at the end of the output shaft 110, so that the workpiece can be driven to rotate through the output shaft 110 to realize the screwdriver function. The impact assembly 200 can drive the output shaft 110 to perform an impact action along the direction of the first axis 101, so that the multifunctional impact drill 100 can realize the function of an impact wrench. The operating member 330 is connected to the impact assembly 200, and the impact function of the multifunctional impact drill 100 is turned on and off through the operating member 330.

[0029] The motor has a motor shaft that rotates along a first axis 101. The multifunctional impact drill 100 also includes a transmission assembly, which connects the motor shaft and an output shaft 110. The motor drives the output shaft 110 to rotate through the transmission assembly.

[0030] Reference Figure 3 , Figure 4 The housing assembly 120 includes a gear box 121, a front housing 122 and a main housing 123. The transmission assembly is disposed in the gear box 121. The impact assembly 200 is disposed in the front housing 122. The main housing 123 supports the gear box 121, the front housing 122 and the motor.

[0031] The transmission assembly 200 includes a first planetary gear set 260, a second planetary gear set 270 and a third planetary gear set 290. The first planetary gear set 260 includes a first planetary gear 261 and a first planetary gear carrier 262, and the second planetary gear set 270 includes a second planetary gear 271 and a second planetary gear carrier 272. The transmission assembly 200 includes a sun gear, which is connected to a motor and driven to rotate by the motor. The first planetary gear 261 is arranged to mesh with the sun gear. The third planetary gear set 290 includes a third planetary gear, a driving wheel and a third-stage inner gear ring. The driving wheel is used to install the third planetary gear, and the driving wheel is meshed with the output shaft 110. The third-stage inner gear ring is meshed with the third planetary gear; the second planetary gear set 270 is arranged between the first planetary gear set 260 and the third planetary gear set 290.

[0032] The transmission assembly 200 also includes a first-stage inner gear ring 263, which is disposed in the housing 110 assembly, and the first-stage inner gear ring 263 meshes with the first planetary gear 261. There are multiple first planetary gears 261, and the multiple first planetary gears 261 are configured to mesh with the sun gear, and the motor drives the first planetary gear 261 to rotate through the sun gear. The sun gear and the first planetary gear 261 form meshing teeth 2731 for transmitting power, and the tooth top circle diameter of the sun gear is set to be smaller than the tooth top circle diameter of the first planetary gear 261, so that the number of teeth of the meshing teeth 2731 of the first planetary gear 261 is greater than the number of teeth of the meshing teeth 2731 of the sun gear.

[0033] The first planetary wheel carrier 262 includes a transmission disc, a support frame and a first output part. The support frame and the first output part are respectively formed on both sides of the transmission disc. The support frame is inserted into the first planetary gear 261 and is rotatably connected with the first planetary gear 261, so that the first planetary gear 261 can drive the first planetary wheel carrier 262 to rotate around the first axis 101 during operation. Meshing teeth 2731 are formed on the circumference of the transmission disc and the first output part. The first output part is used to mesh with the second planetary gear set 270, thereby realizing the transmission connection between the first planetary gear set 260 and the second planetary gear set 270.

[0034] There are multiple second planetary gears 271, and they are externally meshed with the first output part, that is, the first output part of the first planetary gear set 260 constitutes the sun gear of the second planetary gear 271. The transmission assembly 200 also includes a second-stage inner gear ring 273, and inner teeth are formed on the inner periphery of the second-stage inner gear ring 273. The second-stage inner gear ring 273 and the second planetary gear 271 are meshed. The second planetary gear 271 is rotatably connected with the second planetary wheel carrier 272, and the second planetary wheel carrier 272 forms a second output part connected to the output shaft 110. The output shaft 110 includes a flat portion that matches the second output part, and a part of the output shaft 110 is placed between the second output parts, so as to achieve synchronous rotation of the output shaft 110 and the second output part.

[0035] The second-stage inner gear ring 273 meshes with the second planetary gear 271, and the second-stage inner gear ring 273 includes a plurality of first meshing teeth 2731. The transmission assembly also includes a switching member, and the switching member includes a second meshing tooth 2731 that matches the first meshing tooth 2731. The switching member can be moved to at least the first shift position and the second shift position. When the switching member is in the first shift position, the second meshing teeth 2731 and the second inner gear ring are staggered in the circumferential direction of the first axis 101; when the switching member is in the second shift position, the second meshing teeth 2731 and the first meshing teeth 2731 are disengaged in the circumferential direction of the first axis 101. When the switching member is in the first shift position, the second meshing teeth 2731 limit the rotation of the second-stage inner gear ring 273 by abutting against the first meshing teeth 2731, that is, the second-stage inner gear ring 273 cannot rotate relative to the gear box around the first axis 101 at this time, and the second-stage planetary gear set plays a deceleration role, and the transmission assembly 200 outputs the first transmission ratio as a whole. When the switching member is moved to the second speed shift position, the second meshing tooth 2731 and the first meshing tooth 2731 are no longer in contact with each other, so that the second-stage inner ring gear 273 can rotate relative to the gear box, so that the second-stage inner ring gear 273 and the second planetary gear 271 rotate synchronously, and the second-stage planetary gear set has no deceleration effect. At this time, the transmission assembly 200 outputs the second transmission ratio as a whole, and the first transmission ratio is greater than the second transmission ratio.

[0036] The third planetary gear set 290 includes a third planetary gear, a driving wheel and a third-stage inner gear ring. The driving wheel is used to mount the third planetary gear, and the driving wheel is meshed with the output shaft 110. The third-stage inner gear ring is meshed with the third planetary gear. The second planetary gear set 270 is disposed between the first planetary gear set 260 and the third planetary gear set 290.

[0037] Reference Figure 5 and Fig.10 The multifunctional impact drill 100 further includes: a jump pin 310 and a biasing member 320, wherein the jump pin 310 is connected to a locking ring. The second-stage inner gear ring 273 is a locking ring, which includes not only meshing teeth 2731 meshing with the planetary gear, but also locking teeth 2732 abutting against the jump pin 310. The biasing member 320 is connected to the jump pin 310, and the biasing member 320 provides a biasing force that causes the jump pin 310 to press the locking ring. The multifunctional impact drill 100 further includes a function conversion member 340, and the function conversion member 340 includes a stopper 341 that limits the movement of the jump pin 310 in the direction of the first axis 101, and a release member 342 that allows the jump pin 310 to move along the first axis 101. The operating member 330 is connected to the function conversion member 340, and the operating member 330 can drive the function conversion member 340 to rotate around the first axis 101 to switch the limiting state of the movement of the jump pin 310 in the direction of the first axis 101. The gearbox 121 includes a limiting structure for positioning the function conversion member 340, and the function conversion member 340 is limited in the axial direction of the first axis of the gearbox.

[0038] The function conversion member 340 is a gasket, and an opening 343 is formed in the middle of the gasket for the shift-jumping pin 310 to pass through, and the stopper 341 protrudes toward the center of the opening 343 relative to the release portion 342. The function conversion member 340 is a gasket, and an opening 343 is formed in the middle of the gasket for the shift-jumping pin 310 to pass through, and the stopper 341 protrudes toward the center of the opening 343 relative to the release portion 342. The function conversion member 340 can rotate relative to the housing assembly 120 around the first axis 101, so that the stopper 341 and the release portion 342 are respectively aligned with the shift-jumping pin 310 in the axial direction of the first axis 101 or staggered. When the stopper 341 and the shift-jumping pin 310 are aligned in the axial direction of the first axis 101, the stopper 341 of the function conversion member 340 abuts against the shift-jumping pin 310, and the shift-jumping pin 310 cannot compress the biasing member 320 in the axial direction of the first axis 101. The biasing member 320 is a compressible elastic member. When the release portion 342 and the shift-jumping pin 310 are aligned in the axial direction of the first axis 101, the shift-jumping pin 310 can pass through the release portion 342, and the shift-jumping pin 310 can compress the biasing member 320 in the axial direction of the first axis 101. The structure of the function conversion member 340 is simple, and the overall size of the gear box 121 can be reduced.

[0039] The second-stage inner gear ring 273 is a locking ring, which includes not only meshing teeth 2731 meshing with the planetary gear, but also locking teeth 2732 abutting against the jump pin 310. When the multifunctional impact drill 100 is switched to the screw gear, the user adjusts the compression amount of the biasing member 320 to adjust the biasing force provided by the biasing member 320 to the jump pin 310. The jump pin 310 is subjected to both the rotational torque of the second-stage inner gear ring and the pressure of the locking teeth 2732. At this time, if the pressure of the locking teeth 2732 on the jump pin 310 does not exceed the biasing force of the biasing member 320, the jump pin 310 will drive the second-stage inner gear ring to stop rotating, and at this time, the planetary gear carrier can output power through the output shaft 110. At this time, if the pressure of the locking tooth 2732 on the jump gear pin 310 exceeds the biasing force of the biasing member 320, the jump gear pin 310 will move in the axial direction and pass over the locking tooth 2732. At this time, the planetary wheel carrier will not be able to output power through the output shaft 110. By adjusting the biasing force of the biasing member 320, the torque of the torque output tool can be adjusted. When the multifunctional impact drill 100 is switched to the drill gear or the hammer gear, the jump gear pin 310 is locked by the function switching member, so that the multifunctional impact drill 100 outputs the maximum torque.

[0040] Reference Figure 8 , Fig. 9 as well as Fig.10 The impact mechanism 400 includes a fixed impact mechanism 410 and a dynamic impact mechanism 420. The fixed impact mechanism 410 is fixedly connected to the housing assembly 120. The fixed impact mechanism 410 is sleeved on the output shaft 110 and limits the output shaft 110 in the radial direction of the first axis 101. The dynamic impact mechanism 420 can move along the direction of the first axis 101 with the output shaft 110. The operating member 330 is connected to the dynamic impact mechanism 420. The operating member 330 has a first state that allows the dynamic impact mechanism 420 to move in the axial direction of the first axis 101, and a second state that limits the dynamic impact mechanism 420 from moving in the axial direction of the first axis 101, so as to realize turning on or off the impact function of the multifunctional impact drill 100. The user operates the operating member 330 to rotate around the first axis 101 to realize turning on or off the impact function of the multifunctional impact drill 100.

[0041] The fixed impact mechanism 410 includes a fixed impact tooth 411, which is connected to the housing assembly 120. The dynamic impact mechanism 420 includes a dynamic impact tooth 421, which can move along the first axis 101 with the output shaft 110. The fixed impact tooth 411 and the output shaft 110 are matched with a small clearance, and the output shaft 110 can rotate around the first axis 101 relative to the fixed impact tooth 411 and reciprocate along the axial direction of the first axis 101.

[0042] The impact mechanism further includes a leg 430. Optionally, the dynamic impact mechanism 420 forms the leg 430, and the fixed impact mechanism 410 forms a matching portion 440. The dynamic impact mechanism 420 can be driven by the operating member 330 to rotate around the first axis 101, so that the matching portion 440 and the leg 430 are aligned or staggered in the axial direction of the first axis 101. The matching portion 440 is a boss or groove formed on the fixed impact mechanism 410. The matching portion 440 is a boss or groove formed on the fixed impact mechanism 410.

[0043] When the stopper 341 abuts against the jump pin 310, the multifunctional impact drill 100 is switched to the hammer gear or the drill gear. When the jump pin 310 is aligned with the release portion 342 in the direction of the first axis 101, the multifunctional impact drill 100 is switched to the screw gear. When the operating member 330 drives the function conversion member 340 to rotate to the first position, the operating member 330 can be switched to the first state or the second state, so that the multifunctional impact drill 100 is switched to the hammer gear or the drill gear respectively. When the operating member 330 drives the function conversion member 340 to rotate to the second position, the operating member 330 can be switched to the second state, so that the multifunctional impact drill 100 is switched to the screw gear. Thus, the user can adjust the function of the multifunctional impact drill 100 by rotating the operating member 330, and adjust the multifunctional impact drill 100 to the drill gear, the screw gear or the hammer gear in turn.

[0044] When the operating member 330 drives the function conversion member 340 to rotate to the first position, the operating member 330 can be switched to the first state, and the multi-functional impact drill 100 switches to the hammer gear. At this time, the function conversion member 340 drives the function conversion member 340 to rotate, and the support leg 430 rotates, so that the stopper 341 and the jump pin 310 abut, and the grooves of the support leg 430 and the matching part 440 are aligned, or the bosses of the support leg 430 and the matching part 440 are staggered, so that the dynamic impact mechanism 420 can move relative to the housing assembly 120 along the axial direction of the first axis 101, so that the output shaft 110 can impact along the direction of the first axis 101. The operating member 330 is operated to rotate, which can drive the function conversion member 340 to rotate to the first position, and the operating member 330 can be switched to the second state, and the multi-functional impact drill 100 switches to the drilling gear. At this time, the function conversion member 340 drives the function conversion member 340 to rotate, and the support leg 430 rotates, so that the stopper 341 and the jump pin 310 abut, and the grooves of the support leg 430 and the matching part 440 are staggered, or the bosses of the support leg 430 and the matching part 440 abut, so that the multi-functional impact drill 100 rotates with the maximum torque output without generating impact motion. The operating member 330 is operated to rotate, which can drive the function conversion member 340 to rotate to the second position. At this time, the operating member 330 can be switched to the second state, and the multi-functional impact drill 100 switches to the screw gear. At this time, the function conversion member 340 drives the function conversion member 340 to rotate, and the support leg 430 rotates, so that the stop portion 341 and the jump gear pin 310 are staggered, and the jump gear pin 310 can pass through the release portion 342, and the grooves of the support leg 430 and the matching portion 440 are staggered, or the bosses of the support leg 430 and the matching portion 440 are aligned, so that the output shaft 110 does not make an impact movement, and the multi-functional impact drill 100 has the function of adjusting torque.

[0045] Optional, see Fig.10 The impact assembly 200 also includes a bushing 450, which is sleeved on the outside of the dynamic impact mechanism 420. The dynamic impact mechanism 420 forms a support leg 430. The dynamic impact mechanism 420 can be driven by the operating member 330 to rotate around the first axis 101. The bushing 450 forms a matching portion that matches the support leg 430, such as a groove or a boss.

[0046] In one embodiment of the present invention, a multifunctional impact drill is provided, referring to Fig.11 and Fig.12, including a plurality of jump pins 310a, an annular gasket 360a and a biasing member 320a, wherein the jump pin 310a is connected to the locking ring to limit the rotation of the locking ring. The annular gasket 360a is fixedly connected to the plurality of jump pins 310a. The biasing member 320a is connected to the annular gasket 360a, and the biasing member 320a provides a biasing force that causes the jump pin 310a to press the locking ring. The multifunctional impact drill also includes a function conversion member 340a, which can be rotated to a first position and a second position. When the function conversion member 340a is in the first position, the movement of the jump pin 310a relative to the housing assembly 120a in the first axis direction is limited, and when the function conversion member 340a is in the second position, the jump pin 310a can move relative to the housing assembly 120a along the first axis direction. The provision of the annular gasket 360a can reduce the error generated when adjusting the function conversion member 340a. Optionally, the biasing member 320a is a plurality of small springs connected to the annular gasket 360a, or a large spring connected to the annular gasket 360a. Optionally, the front end of the shift-jumping pin 310a forms a first step portion 311a and a second step portion 312a, the first step portion 311a can abut against the stop portion, and the second step portion 312a is located at the side end of the function conversion member 340a.

[0047] The above embodiments are only to illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and modifications, which are within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A multifunctional impact drill, comprising: Motor, A housing assembly, used for supporting the motor; An output shaft, capable of being driven by the motor to rotate about a first axis; A transmission assembly, comprising a locking ring capable of rotating relative to the housing assembly; Characterized in that the multifunctional impact drill also includes: A plurality of jump pins connected to the locking ring to limit the rotation of the locking ring; an annular gasket connected to the plurality of said jump pins; A biasing member connected to the annular gasket, the biasing member providing a biasing force that causes the jump pin to press the locking ring; a function conversion member, the function conversion member being capable of being rotated to a first position and a second position, wherein when the function conversion member is located at the first position, the movement of the shift jump pin relative to the housing assembly in the direction of the first axis is restricted, and when the function conversion member is located at the second position, the shift jump pin is capable of moving relative to the housing assembly along the direction of the first axis; An operating member connected to the function conversion member, wherein the operating member is a rotating drum sleeved on the housing assembly; The functional conversion component includes a stop portion that limits the movement of the jump pin in the direction of the first axis, and a release portion that allows the jump pin to move along the first axis; when the functional conversion component is located in the first position, the stop portion abuts the jump pin, and the jump pin cannot compress the biasing member along the axial direction of the first axis; when the functional conversion component is located in the second position, the jump pin passes through the release portion, and the jump pin compresses the biasing member along the axial direction of the first axis.

2. The multifunctional impact drill according to claim 1, characterized in that: When the stopper abuts against the jump pin, the multifunctional impact drill is switched to the hammer gear or the drill gear, and when the jump pin is aligned with the release portion in the direction of the first axis, the multifunctional impact drill is switched to the screw gear.

3. The multifunctional impact drill according to claim 2, characterized in that: The invention comprises an impact assembly, wherein the impact assembly comprises: a fixed impact mechanism, at least a part of which is fixedly connected to the housing assembly, a dynamic impact mechanism, which can move along the direction of the first axis with the output shaft, an operating member connected to the dynamic impact mechanism, and the operating member has a first state allowing the dynamic impact mechanism to move in the axial direction of the first axis, and a second state restricting the dynamic impact mechanism from moving in the axial direction of the first axis.

4. The multifunctional impact drill according to claim 3, characterized in that: When the operating member drives the function conversion member to rotate to the first position, the operating member can be switched to the first state or the second state, so that the multifunctional impact drill is switched to the hammer gear or the drill gear respectively. When the operating member drives the function conversion member to rotate to the second position, the operating member can be switched to the second state, so that the multifunctional impact drill is switched to the screw gear.

5. The multifunctional impact drill according to claim 3, characterized in that: The dynamic impact mechanism forms a support leg, and the fixed impact mechanism forms a matching portion. The dynamic impact mechanism can be driven by the operating member to rotate around the first axis so that the matching portion and the support leg are aligned or staggered in the axial direction of the first axis.

6. The multifunctional impact drill according to claim 5, characterized in that: The matching portion is a boss or a groove formed on the fixed impact mechanism.

7. The multifunctional impact drill according to claim 3, characterized in that: The impact assembly also includes a bushing, which is sleeved on the outer sides of the dynamic impact mechanism and the fixed impact mechanism. The dynamic impact mechanism forms a support leg. The dynamic impact mechanism can be driven by the operating member to rotate around the first axis. The bushing forms a groove that cooperates with the support leg.

8. The multifunctional impact drill according to claim 1, characterized in that: The operating member can be operated to move around the first axis to switch the state of the operating member and the position of the function conversion member.

9. The multifunctional impact drill according to claim 1, characterized in that: The function conversion part is a gasket, and an opening is formed in the middle of the gasket for the shift jump pin to pass through.

10. The multifunctional impact drill according to claim 1, characterized in that: The transmission assembly includes a planetary gear set and a gear box. The planetary gear set includes: planetary wheels, a sun wheel and a planetary wheel carrier. The planetary wheel carrier is used to install the planetary wheels. The planetary wheels are meshed with the sun wheel. The locking ring includes meshing teeth meshed with the planetary wheels and locking teeth abutting against the jump pin.

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