CN219404088U - Speed regulating ratchet wrench - Google Patents

Abstract

A speed-regulating ratchet wrench includes a housing, a motor inside the housing, a transmission mechanism driven by the motor and a drive mechanism connected to the transmission mechanism. The motor is provided with a drive shaft extending into the transmission mechanism along the axial direction. The housing includes a base for accommodating the transmission mechanism. The transmission mechanism includes first and second planetary mechanisms and inner ring gears sheathed on the outer peripheries of the first and second planetary mechanisms. The first planetary mechanism is provided with a first planetary carrier axially fixed in the base and a first planetary wheel fixed to the first planetary carrier. The second planetary mechanism is provided with a second planetary carrier fixed at the rear end of the first planetary carrier and a second planetary wheel fixed to the second planetary carrier. The driving mechanism is connected to the front end of the first planetary carrier. The inner ring gear moves axially to engage the first planetary gear or the second planetary gear, and the speed-adjusting ratchet wrench realizes speed change by moving back and forth through the double-connected inner ring gear, realizing high speed and high torque functions without changing the motor parameters.

Description

Adjustable speed ratchet wrench

[technical field]

The utility model relates to the technical field of wrench tools, in particular to a speed-regulating ratchet wrench with high rotational speed and high torque.

[Background technique]

The electric ratchet wrench is a tool that automatically tightens bolts through the operation of a motor, and is often used to tighten high-strength bolts. The existing ratchet wrench includes a housing, a motor located in the housing, a gear box driven by the motor, and an output head connected to the gear box. The motor finally outputs power to the output head through the transmission of the gear box. This structure can only provide one speed and one torque output. In the case of a certain motor, the function of high speed and high torque cannot be realized. At the same time, if the ratchet wrench operates at a high speed, because the planetary gear mechanism in the gearbox is not positioned at a high speed, it is easy to cause the vibration of the whole machine and generate heat. Excessive heat will cause the transmission system of the ratchet wrench to work unstable, and then make the working condition of the ratchet wrench worse.

In view of this, it is necessary to provide an improved speed-regulating ratchet wrench to overcome the defects in the prior art.

[utility model content]

Aiming at the deficiencies of the prior art, the purpose of this utility model is to provide a speed-regulating ratchet wrench, which realizes the speed change through the forward and backward movement of the double-connected inner ring gear, and realizes the functions of high speed and high torque without changing the parameters of the motor.

The technical solution adopted by the utility model to solve the problems in the prior art is: a speed-regulating ratchet wrench, comprising a housing extending axially, a motor located in the housing, a transmission mechanism driven by the motor and a driving mechanism connected to the transmission mechanism, the motor drives the driving mechanism to run through the transmission mechanism, and the motor is provided with a drive shaft extending axially into the transmission mechanism. The housing includes a base for accommodating the transmission mechanism. The transmission mechanism includes a first planetary mechanism and a second planetary mechanism located in the base and an inner ring gear sleeved on the outer circumference of the first planetary mechanism and/or the second planetary mechanism. The first planetary mechanism is provided with a first planetary carrier axially fixed in the base and a plurality of first planetary wheels fixed at the axial rear end of the first planetary carrier. The second planetary mechanism is provided with a second planetary carrier fixed at the axial rear end of the first planetary carrier and a plurality of second planetary wheels fixed at the axial rear end of the second planetary carrier. , the driving mechanism is connected to the axial front end of the first planetary carrier, and the first planetary gear and the second planetary gear are meshed with the driving shaft at the same time. The inner ring gear moves axially to engage the first planetary gear or the second planetary gear. When the inner ring gear is engaged with the first planetary gear, the motor drives the driving mechanism to rotate through the first planetary mechanism. When the inner ring gear engages with the second planetary gear, the motor drives the driving mechanism to rotate through the second planetary mechanism.

A further improvement is: the internal ring gear is provided with a front tooth portion located at the axial front end of the inner wall and a rear tooth portion located at the axial rear end of the inner wall, the front tooth portion meshes with the first planetary gear, and the rear tooth portion meshes with the second planetary gear.

A further improvement solution is: the speed-regulating ratchet wrench has a first gear and a second gear. When the speed-regulating ratchet wrench is in the first gear, the internal ring gear is engaged with the first planetary gear, and the driving mechanism outputs a first rotational speed. When the speed-regulating ratchet wrench is in the second gear, the internal ring gear is engaged with the second planetary gear, and the driving mechanism outputs a second rotational speed, and the second rotational speed is greater than the first rotational speed.

A further improvement solution is: when the speed-regulating ratchet wrench is in the first gear, the front gear part meshes with the first planetary gear, and the rear gear part does not mesh with the second planetary gear. At this time, the motor drives the driving mechanism to run through the first planetary mechanism, while the second planetary mechanism idles.

A further improvement solution is: when the speed-regulating ratchet wrench is in the second gear, the rear teeth are engaged with the second planetary gear, and the front teeth are not engaged with the first planetary gear. At this time, the motor drives the driving mechanism to run through the second planetary mechanism, while the first planetary mechanism is idling.

A further improvement is: the base is provided with a base for accommodating the transmission mechanism and a support base connected to the axial rear end of the base, the motor is accommodated in the support base and has a motor shaft extending axially forward, and the drive shaft is connected to the axial front end of the motor shaft and simultaneously drives the first planetary mechanism and the second planetary mechanism.

A further improvement is: the drive shaft is provided with a front gear at the axial front end and a rear gear at the axial rear end, several of the first planetary gears mesh with the outer circumference of the front gear, and several of the second planetary gears mesh with the outer circumference of the rear gear.

A further improvement is: the base is provided with a cylindrical portion extending axially forward from the base, the driving mechanism is provided with a transmission shaft accommodated in the cylindrical portion, and the axial rear end of the transmission shaft is fixedly connected to the first planet carrier.

A further improvement is: the first planetary mechanism is provided with several first pins extending axially backward from the first planetary carrier, the first planetary gear is held at the axial rear end of the first planetary carrier by the first pins, and the first pins extend axially backward into the second planetary carrier, so that the second planetary carrier is fixed at the axial rear end of the first planetary carrier.

A further improvement solution is: the speed regulating ratchet wrench includes a shift button connected to the transmission mechanism, the shift button is provided with an operation part located outside the base and a shift wire connected below the operation part, the shift wire straddles and is held on the outer circumference of the inner ring gear, and the operation part drives the inner ring gear to move axially through the shift wire.

Compared with the prior art, the utility model has the following beneficial effects: the transmission mechanism includes a first planetary mechanism and a second planetary mechanism located in the base and an inner ring gear sleeved on the outer circumference of the first planetary mechanism and/or the second planetary mechanism; At the axial front end of the first planet carrier, the first planetary gear and the second planetary gear are meshed with the drive shaft at the same time. The ring gear moves axially to engage the first planetary gear or the second planetary gear. When the ring gear is engaged with the first planetary gear, the motor drives the drive mechanism to run through the first planetary mechanism. When the ring gear engages with the second planetary gear, the motor drives the drive mechanism to run through the second planetary mechanism. The speed-regulating ratchet wrench realizes the speed change by moving the double-connected inner ring gear back and forth, and realizes the functions of high speed and high torque without changing the parameters of the motor.

[Description of drawings]

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described in further detail:

Fig. 1 is the three-dimensional schematic view of the speed regulating ratchet wrench of the preferred embodiment of the present invention;

Fig. 2 is a sectional view of the speed regulating ratchet wrench shown in Fig. 1;

Fig. 3 is a schematic perspective view of the front end of the speed-regulating ratchet wrench shown in Fig. 1;

Fig. 4 is the three-dimensional cross-sectional view of the front end shown in Fig. 3 except the working head;

Fig. 5 is a three-dimensional cross-sectional view of another angle of the working head except the front end shown in Fig. 4;

Fig. 6 is an exploded schematic view of the transmission mechanism in the front end portion shown in Fig. 3;

Fig. 7 is a perspective sectional view of the transmission mechanism shown in Fig. 6 when it is in the first gear;

Fig. 8 is a perspective sectional view of the transmission mechanism shown in Fig. 7 when it is in the second gear;

Fig. 9 is a three-dimensional schematic diagram of the shift button and the ring gear in the transmission mechanism shown in Fig. 6;

Fig. 10 is a schematic perspective view of the working head in the front end portion shown in Fig. 3;

Fig. 11 is an exploded schematic view of the working head shown in Fig. 10 .

Meanings of reference signs in the figure:

100, speed regulating ratchet wrench 10, housing 11, base 111, support seat 112, base 113, cylindrical portion 12, head shell portion 13, main body portion 14, grip portion 15, control switch 16, lighting lamp 20, motor 21, motor shaft 22, drive shaft 221, front gear 222, rear gear 30, transmission mechanism 31, first planetary mechanism 311, first planet carrier 312, first pin shaft 313, first planet Wheel 314, Groove 32, Second Planetary Mechanism 321, Second Planetary Carrier 322, Second Pin 323, Second Planetary Gear 33, Ring Gear 331, Front Gear 332, Rear Gear 34, Support 40, Shift Knob 41, Operating Part 42, Shift Wire 50, Driving Mechanism 51, Transmission Shaft 511, Eccentric Pin 52, Bushing 60, Ratchet Mechanism 61, Clutch Fork 611, Internal Teeth 612, Recess 62. Ratchet assembly 621, ratchet body 622, drive head 623, pawl 70, battery pack 80, control circuit board

[Detailed ways]

Terms used in the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. For example, words such as "upper", "lower", "front", "rear", etc. indicating the orientation or positional relationship described below are only based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device/element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be interpreted as a limitation of the present utility model.

Please refer to Fig. 1 to Fig. 2 which show a speed-regulating ratchet wrench 100 according to a preferred embodiment of the present invention, which is often used for automatic tightening of bolts. The speed regulating ratchet wrench 100 includes a housing 10 extending axially, a motor 20 located in the housing 10, a transmission mechanism 30 driven by the motor 20, a shift button 40 connected to the transmission mechanism 30, a driving mechanism 50, and a ratchet mechanism 60 driven by the driving mechanism 50. The transmission mechanism 30 is connected to the axial front end of the motor 20, the drive mechanism 50 is connected to the axial front end of the transmission mechanism 30, and the ratchet mechanism 60 is connected to the axial front end of the drive mechanism 50, so that the motor 20 drives the drive mechanism 50 through the transmission mechanism 30, and then drives the ratchet mechanism 60 to operate.

The housing 10 includes a base 11 for accommodating the motor 20, a head shell 12 connected to the axial front end of the base 11, a main body 13 at least partially covering the outer periphery of the base 11, and a gripping portion 14 located at the axial rear end of the main body 13. The transmission mechanism 30 and the driving mechanism 50 are housed in the base 11, and the ratchet mechanism 60 is housed in the head shell 12. Specifically, the base 11 is provided with a base 111 for accommodating the transmission mechanism 30 , a support base 112 connected to the axial rear end of the base 111 , and a cylindrical portion 113 extending axially forward from the base 111 , the motor 20 is accommodated in the support base 112 , and the driving mechanism 50 is accommodated in the cylindrical portion 113 .

The main body 13 at least partially covers the outer periphery of the support seat 112 of the base 11 . In this embodiment, the main body 13 is stably connected to the main body 13 by screwing the base 11 . At the same time, in order to enable the user to conveniently tighten or withdraw the workpiece to be operated in a dark environment, the speed-regulating ratchet wrench 100 is also provided with a lighting lamp 16 located at the front end of the main body 13.

The grip portion 14 is used for gripping by a user. The speed-adjusting ratchet wrench 100 is provided with a battery pack 70 located in the housing 10 and a control circuit board 80 located between the motor 20 and the battery pack 70. Specifically, the battery pack 60 is inserted from the axial rear end of the housing 10 and partially located in the grip portion 14 for powering the speed-regulating ratchet wrench 100. The speed-regulating ratchet wrench 100 is also provided with a control switch 15 connected to the control circuit board 80 , and part of the control switch 15 is exposed outside the grip portion 14 of the housing 10 for user operation to control the start and stop of the speed-regulating ratchet wrench 100 .

6, the motor 20 is accommodated in the support seat 112 of the base 11 and is provided with a motor shaft 21 extending axially forward and a drive shaft 22 connected to the axial front end of the motor shaft 21.

Referring to FIGS. 3 to 9 , the transmission mechanism 30 includes a first planetary mechanism 31 and a second planetary mechanism 32 running at the same speed in the base 11 and an inner ring gear 33 sheathed on the outer circumference of the first planetary mechanism 31 and/or the second planetary mechanism 32 . The first planetary mechanism 31 is provided with a first planet carrier 311 axially fixed in the base 111 of the base 11 , a plurality of first pin shafts 312 extending axially backward from the first planet carrier 311 , and a plurality of first planet wheels 313 correspondingly sleeved on the first pin shafts 312 , the first planet gears 313 are held on the axial rear end of the first planet carrier 311 by the first pin shafts 312 , and the driving mechanism 50 is connected to the axial front end of the first planet carrier 311 .

The second planetary mechanism 32 is located on the axially rear side of the first planetary mechanism 31 and is provided with a second planetary carrier 321 axially behind the first planetary gear 313 , a plurality of second pin shafts 322 extending axially rearward from the second planetary carrier 321 , and a plurality of second planetary gears 323 correspondingly fixed on the second pin shafts 322 . Moreover, the first pin shaft 312 extends axially backward into the second planetary carrier 321 , so that the second planetary carrier 321 is fixed to the axially rear end of the first planetary carrier 311 to run at the same speed.

2, the drive shaft 22 of the motor 20 shown is provided with a front gear 221 positioned at the axial front end and a rear gear 222 positioned at the axial rear end. Several first planetary gears 313 are engaged with the outer circumference of the front gear 221, and several second planetary gears 323 are engaged with the outer circumference of the rear gear 222. When the motor 20 is working, the drive shaft 22 simultaneously drives the first planetary gear 313 of the first planetary mechanism 31 and the second planetary gear 323 of the second planetary mechanism 32 to rotate.

The ring gear 33 moves axially to engage the first planetary gear 313 or the second planetary gear 323. When the ring gear 33 is engaged with the first planetary gear 313, the motor 20 drives the drive mechanism 50 through the first planetary mechanism 31. When the ring gear 33 engages with the second planetary gear 323, the motor 20 drives the drive mechanism 50 through the second planetary mechanism 32 to rotate. Specifically, the inner ring gear 33 is provided with a front tooth portion 331 located at the axial front end of the inner wall and a rear tooth portion 332 located at the axial rear end of the inner wall, the front tooth portion 331 meshes with the first planetary gear 313 of the first planetary mechanism 31 , and the rear tooth portion 332 meshes with the second planetary gear 323 of the second planetary mechanism 32 .

7 and 8, the speed-regulating ratchet wrench 100 has a first gear and a second gear. When the speed-regulating ratchet wrench 100 is in the first gear, the front tooth portion 331 of the inner ring gear 33 is engaged with the first planetary gear 313 of the first planetary mechanism 31, and the driving mechanism 50 outputs the first rotational speed; The planetary gear 323, and the driving mechanism 50 outputs a second rotational speed; the second rotational speed is greater than the first rotational speed, and the speed difference between the second rotational speed and the first rotational speed is less than 2.5 times, and the speed-regulating ratchet wrench 100 realizes the speed change through the forward and backward movement of the double-connected ring gear 33, and realizes the functions of high rotational speed and high torque without changing the motor parameters.

Specifically, when the speed-regulating ratchet wrench 100 is in the first gear, the front tooth portion 331 of the inner ring gear 33 meshes with the first planetary gear 313 of the first planetary mechanism 31 , and the rear tooth portion 332 of the inner ring gear 33 does not mesh with the second planetary gear 323 of the second planetary mechanism 32 . When the speed-regulating ratchet wrench 100 is in the second gear position, the rear tooth portion 332 of the inner ring gear 33 is engaged with the second planetary gear 323 of the second planetary mechanism 32, and the front tooth portion 331 of the inner ring gear 33 is not engaged with the first planetary gear 313 of the first planetary mechanism 31. At this time, the motor 20 drives the drive mechanism 50 to run through the second planetary mechanism 32, while the first planetary mechanism 31 idles.

Meanwhile, the transmission mechanism 30 also includes a supporting member 34 accommodated in the base 11 , and in this embodiment, the supporting member 34 is a deep groove ball bearing. The outer ring of the support member 34 is fixed on the inner wall of the base 111 of the base 11 and the inner ring is sleeved on the outer periphery of the first planet carrier 311 so that the first planet carrier 311 is axially fixed in the base 11 . The transmission mechanism 30 avoids the problem of vibration and heating of the whole machine caused by the first planetary carrier 311 when the rotation speed is too high through the setting of the supporting member 34, thereby making the transmission system more stable.

Combined with FIG. 9, the shift button 40 is equipped with the outer operating department 41 of the base 111 of the base 11 and the dial steel wire 42 connected to the operation department 41. Then, the internal gear of the inner gear 33 is selected to the first line of star wheel 313 or the second star wheel 323.

10 and 11, the transmission shaft 51 of the drive mechanism 50 is fixedly connected to the axial front end of the transmission mechanism 30 and driven by the transmission mechanism 30, the motor 20 drives the drive mechanism 50 to rotate around the axial direction through the transmission mechanism 30, and the motor shaft 21 of the motor 20 and the output shaft 51 of the drive mechanism 50 have the same rotation axis. The ratchet mechanism 60 is connected to the axial front end of the driving mechanism 50 and converts the rotation of the driving mechanism 50 into a vertical rotation perpendicular to the axial direction.

Specifically, the driving mechanism 50 is provided with a transmission shaft 51 accommodated in the cylindrical portion 113 and several bushings 52 sleeved on the outer periphery of the transmission shaft 51 . The axial rear end of the transmission shaft 51 is fixedly connected in the groove 314 of the first planet carrier 311 , and several bushes 52 are respectively arranged at least at the axial front end and the axial rear end of the transmission shaft 51 to support the transmission shaft 51 in the cylindrical portion 113 . The output shaft 51 has an eccentric pin 511 extending forward from the axial front end. The eccentric pin 511 is offset from the axis of the transmission shaft 51 by a certain distance. When the transmission shaft 51 rotates around the axial axis, the eccentric pin 511 makes a circular motion around the axial axis.

Referring to FIGS. 10 and 11 , the ratchet mechanism 60 includes a clutch fork 61 located at the axial front end of the driving mechanism 50 and a ratchet assembly 62 located inside the clutch fork 61 . The clutch fork 61 is provided with a vertically penetrating central hole (not labeled), internal teeth 611 on the inner wall of the central hole, and a recess 612 at the rear end, and the ratchet assembly 62 is accommodated in the central hole. The eccentric pin 511 is accommodated in the concave portion 612 , and when the eccentric pin 511 makes a circular motion around the axial axis, it drives the clutch fork 61 to reciprocate in a transverse direction perpendicular to the longitudinal direction.

The ratchet assembly 62 is provided with a ratchet body 621 located in the central hole, a drive head 622 extending vertically from the ratchet body 621 and a pawl 623 located on the side wall of the ratchet body 621. The ratchet 623 engages with the internal teeth 611 so that the reciprocating motion of the clutch fork 61 in the lateral direction is converted into the vertical rotation of the drive head 622.

In the utility model, the transmission mechanism 30 includes a first planetary mechanism 31 and a second planetary mechanism 32 located in the base 11 and an inner ring gear 33 sleeved on the outer circumference of the first planetary mechanism 31 and/or the second planetary mechanism 32. The first planetary mechanism 31 is provided with a first planetary frame 311 axially fixed in the base 11 and several first planetary wheels 313 fixed at the axial rear end of the first planetary frame 311. The second planetary mechanism 32 is provided with a second planetary frame fixed at the axial rear end of the first planetary frame 311. Frame 321 and several second planetary gears 323 fixed on the axial rear end of the second planetary carrier 321 , the driving mechanism 50 is connected to the axial front end of the first planetary carrier 311 , and the first planetary gears 313 and the second planetary gears 323 are meshed with the drive shaft 22 at the same time. The ring gear 33 moves axially to engage the first planetary gear 313 or the second planetary gear 323; when the ring gear 33 is engaged with the first planetary gear 313, the motor 20 drives the drive mechanism 50 through the first planetary mechanism 31; when the ring gear 33 engages with the second planetary gear 323, the motor 20 drives the drive mechanism 50 through the second planetary mechanism 32. The speed-regulating ratchet wrench 100 realizes the speed change by moving the double-linked ring gear 33 back and forth, and realizes the functions of high speed and high torque without changing the parameters of the motor.

The utility model is not limited to the specific embodiments described above. Those skilled in the art can easily understand that there are many alternatives to the speed-regulating ratchet wrench of the present invention without departing from the principle and scope of the present invention. The protection scope of the utility model shall be determined by the contents of the claims.

Claims (10)

1. A speed-regulating ratchet wrench, comprising an axially extending housing, a motor positioned in the housing, a transmission mechanism driven by the motor, and a driving mechanism connected to the transmission mechanism, the motor drives the driving mechanism through the transmission mechanism, and the motor is provided with a drive shaft extending axially into the transmission mechanism; it is characterized in that: the housing includes a base for accommodating the transmission mechanism, and the transmission mechanism includes a first planetary mechanism and a second planetary mechanism located in the base, and an inner ring gear sleeved on the outer circumference of the first planetary mechanism and/or the second planetary mechanism The first planetary mechanism is provided with a first planetary carrier axially fixed in the base and several first planetary gears fixed at the axial rear end of the first planetary carrier; the second planetary mechanism is provided with a second planetary carrier fixed at the axial rear end of the first planetary carrier and several second planetary wheels fixed at the axial rear end of the second planetary carrier; the driving mechanism is connected to the axial front end of the first planetary carrier; When the ring gear meshes with the first planetary gear, the motor drives the driving mechanism to rotate through the first planetary mechanism; when the ring gear meshes with the second planetary gear, the motor drives the driving mechanism to rotate through the second planetary mechanism. 2. The speed-regulating ratchet wrench according to claim 1, wherein the internal ring gear is provided with a front tooth portion located at the axial front end of the inner wall and a rear tooth portion located at the axial rear end of the inner wall, the front tooth portion meshes with the first planetary gear, and the rear tooth portion meshes with the second planetary wheel. 3. The speed-regulating ratchet wrench according to claim 2, characterized in that: the speed-regulating ratchet wrench has a first gear and a second gear, when the speed-regulating ratchet wrench is in the first gear, the inner ring gear is engaged with the first planetary gear, and the driving mechanism outputs a first rotational speed; when the speed-regulating ratchet wrench is in the second gear, the inner gear ring is engaged with the second planetary gear, and the driving mechanism outputs a second rotational speed, and the second rotational speed is greater than the first rotational speed. 4. The speed-regulating ratchet wrench according to claim 3, characterized in that: when the speed-regulating ratchet wrench is in the first gear position, the front gear part is engaged with the first planetary gear, and the rear gear part is not meshed with the second planetary gear, at this time, the motor drives the driving mechanism to run through the first planetary mechanism, while the second planetary mechanism is idling. 5. The speed-regulating ratchet wrench according to claim 3, characterized in that: when the speed-regulating ratchet wrench is in the second gear, the rear teeth engage with the second planetary gear, and the front teeth do not engage with the first planetary gear, at this time, the motor drives the drive mechanism to run through the second planetary mechanism, while the first planetary mechanism is idling. 6. The speed-regulating ratchet wrench according to claim 1, wherein the base is provided with a base for accommodating the transmission mechanism and a support seat connected to the axial rear end of the base, the motor is housed in the support seat and is provided with a motor shaft extending axially forward, and the drive shaft is connected to the axial front end of the motor shaft and simultaneously drives the first planetary mechanism and the second planetary mechanism. 7. The speed-regulating ratchet wrench according to claim 6, characterized in that: the drive shaft is provided with a front gear positioned at the axial front end and a rear gear positioned at the axial rear end, several of the first planetary gears mesh with the outer circumference of the front gear, and several of the second planetary gears mesh with the outer circumference of the rear gear. 8. The speed-regulating ratchet wrench according to claim 6, wherein the base is provided with a cylindrical portion extending axially forward from the base, the driving mechanism is provided with a transmission shaft accommodated in the cylindrical portion, and the axial rear end of the transmission shaft is fixedly connected to the first planet carrier. 9. The speed-regulating ratchet wrench according to claim 1, wherein the first planetary mechanism is provided with several first pins extending axially backward from the first planetary carrier, the first planetary gear is held on the axial rear end of the first planetary carrier by the first pins, and the first pins extend axially backward into the second planetary carrier, so that the second planetary carrier is fixed on the axial rear end of the first planetary carrier. 10. The speed-regulating ratchet wrench according to claim 1, characterized in that: the speed-regulating ratchet wrench includes a shift button connected to the transmission mechanism, the shift button is provided with an operation part located outside the base and a shift wire connected below the operation part, the shift wire straddles and is held on the outer periphery of the inner ring gear, and the operation part drives the inner ring gear to move axially through the shift wire.