CN111207211A

CN111207211A - Gear shifting actuator with manual unlocking function

Info

Publication number: CN111207211A
Application number: CN201911401429.0A
Authority: CN
Inventors: 钱高法; 李保; 王家家; 陈江辉; 谢凯杰; 曹夏迪; 金晓宇
Original assignee: Ningbo Gaofa Automotive Control System Co ltd
Current assignee: Ningbo Gaofa Automotive Control System Co ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-05-29

Abstract

The invention provides a gear shifting actuator with a manual unlocking function, which belongs to the technical field of vehicle gear shifting actuators and comprises the following components: the shell is provided with a sealed installation cavity, and an unlocking port is arranged on the shell; a power unit disposed within the mounting cavity; the transmission unit is arranged in the installation cavity and is in linkage connection with the power unit, a manual driving end is arranged on the transmission unit and is aligned to the unlocking port, and when the power unit fails, an unlocking tool can be connected with the manual driving end through the unlocking port to drive the transmission unit to move. The invention has the beneficial effects that: when the actuator is powered off or cannot work, the actuator can be driven in a manual mode, so that the gear shifting function is realized, and the problem that the vehicle cannot move due to actuator faults is solved.

Description

Gear shifting actuator with manual unlocking function

Technical Field

The invention belongs to the technical field of vehicle gear shifting actuators, and relates to a gear shifting actuator with a manual unlocking function.

Background

In modern society, automobiles have become one of the first-choice transportation tools for the public. Automobiles can be roughly classified into automatic gears and manual gears. Of course, many automobiles have the driving experience which is forbidden and are self-contained. A transmission is installed in the automobile, and the switching of different gears is realized through the transmission.

The actuator is a component for controlling the speed change of an automobile gearbox, and is widely applied to automatic-gear automobiles at present, wherein the automatic-gear automobiles send gear shifting instructions by a front-end electronic gear shifter, and the electronic gear shifting actuator executes mechanical actions to drive the gearbox to change gears and feed back a current position electric signal to realize a gear shifting function.

However, when the actuator is powered off, the gear shifting operation cannot be performed, and in short, when the power is off or a certain condition occurs, the actuator cannot work, so that the gear box cannot shift, and thus the vehicle cannot shift.

For example, when the vehicle is in the P-range lock state, the vehicle fails to switch the transmission to the non-P-range lock state by a condition such as energization due to a malfunction, and the vehicle cannot move. The automobile occupies a normal road when the automobile fails and cannot move, potential safety hazards are caused to other vehicles running normally, and the gearbox is damaged when the automobile moves forcibly.

Therefore, in order to solve the defect that the vehicle actuator cannot be shifted due to power failure or damage, a Chinese patent with application number of 201910355355.5 is provided, and an automobile gearbox part is disclosed, in particular to a P-gear unlocking mechanism of an electronic shift actuator. The utility model provides a P of electron executor of shifting gears keeps off release mechanism, includes the unblock lever subassembly, the unblock lever subassembly is fixed on the unblock lever support, and the unblock lever subassembly meets with the output shaft through linkage structure, and the output shaft is connected with the interior main shaft of gearbox, the unblock lever subassembly include the unblock lever, drive the output shaft and rotate when the unblock lever motion.

However, the actuator is complicated in structure, needs an additional unlocking lever, and is troublesome in manually shifting the shift position, so that there is a room for improvement.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides a gear shifting actuator with a manual unlocking function.

The purpose of the invention can be realized by the following technical scheme: a shift actuator with manual unlocking function, comprising:

the shell is provided with a sealed installation cavity, and an unlocking port is arranged on the shell;

a power unit disposed within the mounting cavity;

the transmission unit is arranged in the installation cavity and is in linkage connection with the power unit, a manual driving end is arranged on the transmission unit and is aligned to the unlocking port, and when the power unit fails, an unlocking tool can be connected with the manual driving end through the unlocking port to drive the transmission unit to move.

Preferably, the casing includes base and upper cover, the upper cover is fixed on the base, the unlocking port sets up the upper cover, and be provided with the blanking cover on the unlocking port, work as the blanking cover follow can be to when separating in the unlocking port the transmission unit unlocks.

Preferably, the transmission unit comprises a gear shaft, a worm and a worm wheel, the gear shaft is in linkage connection with the worm, the worm is in linkage connection with the worm wheel, an output shaft is arranged on the worm wheel, the lower end of the output shaft penetrates through the base and then is connected with a gear shifting shaft of the gearbox, and the manual driving end is arranged on the gear shaft.

Preferably, a pressing plate is arranged in the installation cavity and fixedly connected with the base, the transmission unit and the power unit are arranged between the pressing plate and the base, a PCB is arranged between the pressing plate and the upper cover, and the PCB is electrically connected with the power unit.

Preferably, two first shaft holes and two second shaft holes are formed between the pressing plate and the base, bearings are arranged in the first shaft holes and the second shaft holes, two ends of the gear shaft are arranged in the two first shaft holes respectively, two ends of the worm are arranged in the two second shaft holes respectively, the gear shaft and the worm are arranged in parallel, and the upper end of the output shaft penetrates through the pressing plate.

Preferably, the power unit is a motor, a first driving gear is arranged on the motor, a first driven gear and a second driving gear are arranged on the gear shaft, a second driven gear is arranged on the worm, the first driving gear is meshed with the first driven gear so that the motor is in linkage connection with the gear shaft, and the second driving gear is meshed with the second driven gear so that the gear shaft is in linkage connection with the worm.

Preferably, the upper end of the output shaft is provided with an input end, the input end penetrates through the pressing plate and is provided with magnetic steel, an angle hall sensor is arranged on the PCB, and the magnetic steel is located below the angle hall sensor.

Preferably, the manual driving end is of a groove structure, the end of the gear shaft is aligned with the unlocking port, and the manual driving end is arranged at the end of the gear shaft and matched with the screwdriver.

Preferably, the lower end surface of the output shaft is provided with a slotted hole, the slotted hole is provided with two parallel straight surfaces and two cambered surfaces, the two straight surfaces are used for transmitting torque, and the two cambered surfaces are used for coaxial positioning.

Preferably, the primary driving gear and the primary driven gear form primary transmission, the secondary driving gear and the secondary driven gear form secondary transmission, and the torque transmitted by the primary transmission is smaller than the torque transmitted by the secondary transmission.

Compared with the prior art, the invention has the beneficial effects that:

1. when the actuator is powered off or cannot work, the actuator can be driven in a manual mode, so that the gear shifting function is realized, and the problem that the vehicle cannot move due to actuator faults is solved.

2. The power unit and the transmission unit are arranged on the base and pressed by the pressing plate, the PCB is arranged in the mounting cavity and is positioned above the pressing plate, so that the whole actuator is more compact in structure, and the stability of the transmission unit and the power unit is ensured; in addition, the pressing plate is matched with the base to fix the power unit and the transmission unit, so that the mounting precision of the power unit and the transmission unit is ensured, and the reliability in transmission is ensured.

3. When actual unblock, at first pull down the blanking cover, then stretch into the screwdriver for the screwdriver gets up with the cell body structure cooperation of manual drive end, then twists the gear shaft, just so can realize the purpose of manual shift.

Drawings

Fig. 1 is an exploded view of the shift actuator of the present invention.

Fig. 2 is a schematic structural diagram of a transmission unit and a power unit of the present invention.

Fig. 3 is a schematic structural view of the unlocking port of the present invention.

Fig. 4 is a schematic view of the unlocking opening and the blocking cover of the present invention.

FIG. 5 is a schematic view of the connection between the transmission unit and the power unit according to the present invention.

Fig. 6 is a schematic position diagram of the magnetic steel and the PCB of the present invention.

FIG. 7 is a structural diagram of a slot according to the present invention.

In the figure, 100, base; 110. pressing a plate; 120. a first shaft hole; 130. a second shaft hole; 200. an upper cover; 210. unlocking the opening; 220. blocking the cover; 300. a PCB board; 310. an angle Hall sensor; 410. a gear shaft; 411. a manual drive end; 412. a primary driven gear; 413. a secondary drive gear; 420. a worm; 421. a secondary driven gear; 430. a worm gear; 440. an output shaft; 441. a slot; 442. a straight surface; 443. a cambered surface; 444. an input end; 450. magnetic steel; 500. a motor; 510. a primary driving gear.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1, 2, 3, 4, 5, and 6, a shift actuator with a manual unlocking function includes: the transmission unit is driven by the power unit when the power unit normally works, and once the power unit cannot work, the transmission unit can be driven to move by adopting a manual adjusting mode.

It should be noted that, once the actuator fails to perform the shifting operation, the transmission is actually in a certain gear and cannot be shifted, which may be considered as being in a locked state, for example, because the actuator fails to work, once the vehicle is in the P gear, the vehicle cannot be moved, which is very troublesome, and the conventional method is difficult to unlock by the actuator and shift to other gears.

In order to solve the above problems, there is a need for an actuator capable of manual switching or unlocking, wherein the housing has a sealed installation cavity, the housing is actually a detachable structure, and the installation cavity is a sealed cavity with a sealing grade of IP67, so that water can not enter in 30 minutes under the condition of 1m water depth, and dust and sundries can be prevented, and various components are arranged in the installation cavity.

And be provided with the unlocking mouth 210 on the casing, unlocking mouth 210 is through-hole column structure, more specifically, unlocking mouth 210 is the screw hole structure to it runs through the casing setting, and the unblock instrument can pass unlocking mouth 210 and stretch into to the installation intracavity, then unlocks, and this kind of structure can make the executor need not to set up the basis of extra unlocking structure, can directly unlock through manual mode for the executor structure is more compact reliable.

The power unit is arranged in the mounting cavity, the power assembly is an assembly for providing power, at present, in the actuator, the power unit is operated in an electric mode, however, once the inside of the actuator is powered off or has a fault, the power unit cannot be operated, at this time, the vehicle is in a certain gear position, for example, in a P gear, and as the power unit cannot be operated, the vehicle cannot be moved, and at this time, various inconveniences are caused.

The transmission unit sets up in the installation cavity to the transmission unit with the power pack linkage is connected, and it is worth explaining here that, the transmission unit is driven by the power pack, then rotates, thereby provides the moment of torsion, just so can drive the gearbox and switch over the gear.

In the prior art, since the transmission unit can only be driven by the power unit, or the transmission unit can only be driven by the structure inside the actuator, and the housing is a sealed structure, the external tool cannot transmit torque to the transmission unit, if an additional unlocking structure is arranged inside the actuator, the volume of the actuator is increased, and the reliability is low.

In the present embodiment, the transmission unit is provided with a manual driving end 411, and the manual driving end 411 is aligned with the unlocking port 210, so that a torque can be applied to the manual driving end 411 through the unlocking port 210 to drive the transmission unit to work.

Specifically, an unlocking tool may be coupled to the manual drive end 411 through the unlocking port 210 to move the transmission unit when the power unit fails.

According to the unlocking device, an external tool can be connected with the transmission unit through the unlocking port 210, and then torque is transmitted manually, so that the whole actuator is compact and reliable in structure, other structures are not required to be additionally arranged, and compared with a complex unlocking assembly additionally arranged in the actuator, the unlocking device is ingenious in structure, the actuator can be driven in a manual mode, so that a gear shifting function is realized, and the problem that a vehicle cannot move due to actuator faults is solved.

As shown in fig. 1, 2, 3 and 4, on the basis of the above embodiment, the housing includes a base 100 and an upper cover 200, the upper cover 200 is fixed on the base 100, the unlocking hole 210 is provided on the upper cover 200, and a blocking cover 220 is provided on the unlocking hole 210, so that the transmission unit can be unlocked when the blocking cover 220 is separated from the unlocking hole 210.

Preferably, the housing is a substantially detachable structure, the base 100 is adapted to be fixedly connected to the transmission case, the cover 200 is fixed to the base 100, thereby forming a mounting cavity therein, and a sealing ring may be provided between the base 100 and the upper cap 200, thereby ensuring the sealability of the housing, and the unlocking hole 210 passes through the upper cap 200, the blocking cap 220 blocks the unlocking hole 210, therefore, the shell can be ensured to be in a sealing state when in use, and further, the structure can ensure that the sealing grade of the shell reaches IP67, has excellent waterproof effect, under the condition of 1m water depth, water does not enter for 30 minutes, and in addition, dust and impurities can be prevented from entering the installation cavity, and it is worth explaining here, after the blocking cover 220 is arranged, the whole shell forms a sealing structure through the sealing ring, therefore, the waterproof paint has good waterproof effect and can also have the waterproof effect under certain water pressure.

Specifically, the unlocking hole 210 is a threaded hole structure penetrating through the upper cover, and the cap 220 is a hexagonal screw structure which can be screwed into the unlocking hole 210 and can screw the cap 220 out of the unlocking hole 210.

Preferably, in actual use, the blocking cover 220 may be firstly detached to expose the unlocking port 210, and a user may extend into the unlocking port 210 through a tool, then connect with the manual driving end 411, and transmit torque to the transmission unit, so as to finally achieve the effect of manually switching gears.

As shown in fig. 1, 2 and 5, on the basis of the above embodiment, the transmission unit includes a gear shaft 410, a worm 420 and a worm wheel 430, the gear shaft 410 is linked with the worm 420, the worm 420 is linked with the worm wheel 430, an output shaft 440 is disposed on the worm wheel 430, a lower end of the output shaft 440 passes through the base 100 and then is connected with a gear shifting shaft of a transmission, and the manual driving end 411 is disposed on the gear shaft 410.

The transmission unit actually includes a gear transmission and a worm gear 430 and a worm 420 transmission, and more specifically, the power unit is not directly coupled with the worm 420 but coupled with the worm 420 through a gear shaft 410, whereas the worm 420 is generally directly coupled with the motor 500 in the prior art.

Preferably, the gear shaft 410 transmits the torque of the power unit to the worm 420, and the manual driving end 411 is disposed on the gear shaft 410 and aligned with the unlocking port 210, or the manual driving end 411 is located in the unlocking port 210, in short, as long as a person can penetrate a tool into the installation cavity through the unlocking port 210 and connect with the manual driving end 411, and then rotate the gear shaft 410 by screwing, once the gear shaft 410 rotates, the worm 420 can be driven to rotate, and the purpose of manual unlocking is achieved.

In addition, it should be noted that the torque of the power unit is transmitted through the gear shaft 410, which is not a conventional arrangement but a necessary structure for realizing manual unlocking, because if the power unit is directly connected with the worm 420, the worm 420 cannot be directly screwed, because the worm gear 430 and the worm 420 require a larger torque to be driven, and after the gear shaft 410 is arranged, the gear shaft 410 is screwed, the worm 420 can be driven by a smaller torque, which is simple, namely, the gear shaft 410 additionally arranged not only plays a role of transmitting the torque, but also can be matched with the unlocking opening 210 to realize the purpose of manual unlocking, especially, the gear shaft 410 is matched with the unlocking opening 210 to realize a very ingenious design, and the combination of the two can realize a new technical effect.

Preferably, the worm wheel 430 is provided with an output shaft 440, and the lower end of the output shaft 440 penetrates through the base 100 and is connected to a gear shifting shaft of the gearbox, where it is worth to say that the worm 420 drives the worm wheel 430 to rotate and then drives the output shaft 440 to rotate, and when the output shaft 440 rotates, the gear shifting shaft of the gearbox can be screwed, and specifically, the rotation angle of the output shaft 440 can switch the gearbox to different gears.

As shown in fig. 1, 2, 5, and 6, on the basis of the above embodiments, a pressing plate 110 is disposed in the installation cavity, the pressing plate 110 is fixedly connected to the base 100, the transmission unit and the power unit are both disposed between the pressing plate 110 and the base 100, a PCB 300 is disposed between the pressing plate 110 and the upper cover 200, and the PCB 300 is electrically connected to the power unit.

Preferably, the pressing plate 110 is arranged in the mounting cavity, the pressing plate 110 can assist the mounting and positioning of the transmission unit and the power unit, specifically, the power unit and the transmission unit are arranged on the base 100 and pressed by the pressing plate 110, the PCB 300 is arranged in the mounting cavity, and the PCB 300 is located above the pressing plate 110, so that the whole actuator structure is more compact, and the stability of the transmission unit and the power unit is ensured; in addition, the pressing plate 110 is matched with the base 100 to fix the power unit and the transmission unit, so that the connection precision of the power unit and the transmission unit is ensured, and the reliability in transmission is ensured.

As shown in fig. 1 and 5, in addition to the above embodiment, two first shaft holes 120 and two second shaft holes 130 are formed between the pressing plate 110 and the base 100, bearings are respectively disposed in the first shaft holes 120 and the second shaft holes 130, two ends of the gear shaft 410 are respectively disposed in the two first shaft holes 120, two ends of the worm 420 are respectively disposed in the two second shaft holes 130, the gear shaft 410 and the worm 420 are disposed in parallel, and the upper end of the output shaft 440 is inserted into the pressing plate 110.

Preferably, the pressing plate 110 and the front end and the rear end of the base 100 are respectively provided with two semicircular notches, so that when the pressing plate 110 is connected with the base 100, the two semicircular notches can be spliced into a shaft hole, more specifically, two first shaft holes 120 and two second shaft holes 130 are formed, and the two first shaft holes 120 and the two second shaft holes 130 are respectively arranged in front and at the rear.

Preferably, shaft holes are formed in the first shaft hole 120 and the second shaft hole 130, wherein both ends of the gear shaft 410 are disposed in the two first shaft holes 120, and both ends of the worm 420 are disposed in the two second shaft holes 130, so that the first shaft hole 120 and the second shaft hole 130 formed by the pressing plate 110 and the base 100 can improve the mounting accuracy of the gear shaft 410 and the worm 420, and the gear shaft 410 and the worm 420 can be positioned by the first shaft hole 120 and the second shaft hole 130, so that the mounting accuracy of the two can be greatly improved.

As shown in fig. 1, 2, 5 and 6, in addition to the above embodiment, the power unit is a motor 500, the motor 500 is provided with a primary driving gear 510, the gear shaft 410 is provided with a primary driven gear 412 and a secondary driving gear 413, the worm 420 is provided with a secondary driven gear 421, the primary driving gear 510 is engaged with the primary driven gear 412 to couple the motor 500 and the gear shaft 410, and the secondary driving gear 413 is engaged with the secondary driven gear 421 to couple the gear shaft 410 and the worm 420.

Preferably, the power unit employs a motor 500, and a primary driving gear 510 of the motor 500 can be engaged with a primary driven gear 412 of the gear shaft 410, so that the motor 500 drives the gear shaft 410 to rotate, and when the gear shaft 410 rotates, the secondary driven gear 421 is driven to rotate by a secondary driving gear 413, and then the worm 420 is driven to rotate, and the worm 420 is engaged with the worm wheel 430, so that the worm wheel 430 is finally rotated.

As shown in fig. 1, 2, and 6, on the basis of the above embodiment, an input end 444 is disposed at an upper end of the output shaft 440, the input end 444 penetrates the pressing plate 110 and is provided with a magnetic steel 450, the angle hall sensor 310 is disposed on the PCB 300, and the magnetic steel 450 is located below the angle hall sensor 310.

Preferably, the upper end of the output shaft 440 penetrates through the pressing plate 110 and is provided with an input end 444, the input end 444 is sleeved with a magnetic steel 450, the magnetic steel 450 is just located on the angle hall sensor 310, and therefore the rotating angle of the output shaft 440 can be sensed, the PCB 300 drives the motor 500 to rotate, then the output shaft 440 rotates by a certain angle, the angle hall sensor 310 monitors the rotating angle of the output shaft 440 at the moment, then the angle hall sensor 310 feeds back a signal to the PCB 300, and the control motor 500 stops rotating.

As shown in fig. 1, 2 and 5, on the basis of the above embodiment, the manual driving end 411 is of a slot structure, the end of the gear shaft 410 is aligned with the unlocking port 210, and the manual driving end 411 is provided at the end of the gear shaft 410 and is adapted to a screwdriver.

Preferably, the manual driving end 411 is actually the end of the gear shaft 410, and the manual driving end 411 may be a straight groove or a cross-shaped groove, so as to be adapted to a straight screwdriver or a cross-shaped screwdriver, when actually unlocking, firstly removing the blocking cover 220, then extending the screwdriver into the groove to match the screwdriver with the groove structure of the manual driving end 411, and then screwing the gear shaft 410, so as to achieve the purpose of manual gear shifting.

As shown in fig. 1, 2 and 7, on the basis of the above embodiment, the lower end surface of the output shaft 440 is provided with a slot 441, the slot 441 has two parallel straight surfaces 442 and two arc surfaces 443, the two straight surfaces 442 are used for transmitting torque, and the two arc surfaces 443 are used for coaxial positioning.

Preferably, the slot 441 can be connected with a gear shifting shaft of the gearbox, and the structure can achieve the positioning effect and the torque transmission effect, so that the gearbox is very ingenious.

As shown in fig. 1, 2 and 5, in addition to the above embodiment, the primary driving gear 510 and the primary driven gear 412 form a primary transmission, and the secondary driving gear 413 and the secondary driven gear 421 form a secondary transmission, and the torque transmitted by the primary transmission is smaller than the torque transmitted by the secondary transmission.

It should be noted that, in the actual structure, the number of teeth of the first driving gear is 14, the number of teeth of the first driven gear is 59, so that the first-stage transmission can be formed, the number of teeth of the second driving gear is 10, and the number of teeth of the second driven gear is 23, so that the second-stage transmission can be formed, so that, since the first driven gear is a large gear, which can screw the gear shaft 410 with a small torque, in simple terms, the gear shaft 410 can be screwed more conveniently, if the worm 420 is directly screwed, it is difficult to rotate by hand because the required torque is too large, if the gear shaft 410 is used alone, there may be a reason that the resistance is too large, and the gear shaft 410 is matched with the first driven gear of the large gear structure, a small torque is required to rotate the gear shaft 410.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims

1. A shift actuator with manual unlocking, comprising:

a power unit disposed within the mounting cavity;

2. A shift actuator with manual unlocking function according to claim 1, characterized in that: the casing includes base and upper cover, the upper cover is fixed on the base, the mouth that unlocks sets up the upper cover, and be provided with the blanking cover on the mouth that unlocks, work as the blanking cover is followed can be right when the separation in the mouth that unlocks the transmission unit unlocks.

3. A shift actuator with manual unlocking function according to claim 2, characterized in that: the transmission unit comprises a gear shaft, a worm and a worm wheel, the gear shaft is connected with the worm in a linkage mode, the worm is connected with the worm wheel in a linkage mode, an output shaft is arranged on the worm wheel, the lower end of the output shaft penetrates through the base and then is connected with a gear shifting shaft of a gearbox, and the manual driving end is arranged on the gear shaft.

4. A shift actuator with manual unlocking function according to claim 3, characterized in that: the PCB is arranged between the pressing plate and the upper cover, and is electrically connected with the power unit.

5. A shift actuator with manual unlocking function according to claim 4, characterized in that: the clamp plate with be formed with two primary shaft holes and two secondary shaft holes between the base, the primary shaft hole with the downthehole bearing that all is provided with of secondary shaft, the both ends of gear shaft set up respectively two in the primary shaft hole, the both ends of worm set up respectively two in the secondary shaft hole, and the gear shaft with the worm is parallel arrangement, the upper end of output shaft is worn to establish on the clamp plate.

6. A shift actuator with manual unlocking function according to claim 4, characterized in that: the power unit is a motor, a first-stage driving gear is arranged on the motor, a first-stage driven gear and a second-stage driving gear are arranged on the gear shaft, a second-stage driven gear is arranged on the worm, the first-stage driving gear is meshed with the first-stage driven gear so that the motor is connected with the gear shaft in a linkage mode, and the second-stage driving gear is meshed with the second-stage driven gear so that the gear shaft is connected with the worm in a linkage mode.

7. A shift actuator with manual unlocking function according to claim 6, characterized in that: the upper end of output shaft is provided with the input, the input passes the clamp plate is provided with the magnet steel, be provided with angle hall sensor on the PCB board, the magnet steel is located angle hall sensor's below.

8. A shift actuator with manual unlocking function according to claim 3, characterized in that: the manual driving end is of a groove structure, the end portion of the gear shaft is aligned to the unlocking hole, and the manual driving end is arranged at the end portion of the gear shaft and matched with a screwdriver.

9. A shift actuator with manual unlocking function according to claim 3, characterized in that: the lower end face of the output shaft is provided with a slotted hole, the slotted hole is provided with two parallel straight faces and two cambered surfaces, the two straight faces are used for transmitting torque, and the two cambered surfaces are used for coaxial positioning.

10. A shift actuator with manual unlocking function according to claim 6, characterized in that: the first-stage driving gear and the first-stage driven gear form first-stage transmission, the second-stage driving gear and the second-stage driven gear form second-stage transmission, and the torque transmitted by the first-stage transmission is smaller than the torque transmitted by the second-stage transmission.