CN110541932B

CN110541932B - Gear shifting actuator and gearbox

Info

Publication number: CN110541932B
Application number: CN201810529709.9A
Authority: CN
Inventors: 朱晓丽; 陈汉军
Original assignee: SAIC General Motors Corp Ltd; Pan Asia Technical Automotive Center Co Ltd
Current assignee: SAIC General Motors Corp Ltd; Pan Asia Technical Automotive Center Co Ltd
Priority date: 2018-05-29
Filing date: 2018-05-29
Publication date: 2020-12-15
Anticipated expiration: 2038-05-29
Also published as: CN110541932A

Abstract

The application discloses shift executor and gearbox. The gear shifting actuator comprises a main torque input gear for receiving driving torque input to the gear shifting actuator; a torque output shaft that performs a gear shift operation of the transmission using the driving torque; an energy storage spring disposed between the main torque input gear and the torque output shaft; a first lock member and a second lock member; the first locking piece and the second locking piece can be locked and unlocked mutually; when the first locking piece and the second locking piece are locked with each other, the energy storage spring is in a compressed state, and the driving torque can be transmitted to the torque output shaft through the main torque input gear, the first locking piece and the second locking piece; when the first locking piece and the second locking piece are mutually unlocked, the torque output shaft performs gear shifting operation of the gearbox under the action of the energy storage spring. The gear shift actuator according to the invention can ensure the safety of the vehicle in a simple manner.

Description

Gear shifting actuator and gearbox

Technical Field

The invention relates to the field of automobiles, in particular to a gear shifting actuator and a gearbox with the gear shifting actuator.

Background

With the continuous progress and development of modern automobile technology, electronic gears are more and more applied to many automobiles, particularly high-end automobile types, and electronic communication and electronic actuating mechanisms replace pure mechanical parts such as inhaul cables, shift rods and the like on the traditional gear shifting system and directly complete gear shifting through electronic control and electric driving actuators. In addition, because the electronic gear shifting system is less restricted by spatial arrangement, the modeling can provide a larger space for exertion, and the electronic gear shifting system can provide dazzling, novel and fashionable gear shifting experience for users, is loved by more and more users, and is becoming a trend of the development of automobile gear shifting technology.

AT present, the electronic gear shifting actuator is mainly applied to an electronic gear shifting system carrying a traditional AT gearbox and an electric drive unit of a new energy vehicle. Meanwhile, at the present stage, with the deepening of the automatic driving technology of the vehicle, the requirement on the safety of the vehicle is higher and higher, and the gear shifting is taken as a safety related function, so that the system is required to have the capability of automatically degrading to a safe state in case of failure. Therefore, more standby safety mechanisms are added in the aspect of actuator design to ensure the safety and reliability of gear shifting, such as automatic P-gear failure.

Disclosure of Invention

The invention provides a gear shift actuator which can ensure the safety of a vehicle in a simple manner.

According to one aspect of the present invention, a shift actuator is provided, comprising:

a main torque input gear for receiving a driving torque input to the shift actuator;

a torque output shaft that performs a gear shift operation of the transmission using the driving torque;

an energy storage spring disposed between the main torque input gear and the torque output shaft;

a first lock fixedly connected to the main torque input gear; and

a second locking member fixedly connected to the torque output shaft;

the first locking piece and the second locking piece can be locked and unlocked mutually; when the first locking piece and the second locking piece are locked with each other, the energy storage spring is in a compressed state, and the driving torque can be transmitted to the torque output shaft through the main torque input gear, the first locking piece and the second locking piece; when the first locking piece and the second locking piece are mutually unlocked, the torque output shaft performs gear shifting operation of the gearbox under the action of the energy storage spring.

According to the gear shifting actuator provided by the embodiment of the invention, when the first locking piece and the second locking piece are mutually unlocked, the torque output shaft enables the gearbox to enter a parking gear under the action of the energy storage spring.

According to one embodiment of the present invention, a shift actuator is provided that includes a main drive motor for providing drive torque to the main torque input gear.

According to the gear shifting actuator provided by one embodiment of the invention, the first locking piece is provided with the lock tongue, the second locking piece is provided with the groove, and the first locking piece and the second locking piece are mutually locked and unlocked through the cooperation of the lock tongue and the groove.

According to one embodiment of the invention, a gear shift actuator is provided, which comprises a return drive motor for driving the first and second locking elements to unlock from each other.

According to one embodiment of the invention, the shift actuator comprises an energy storage capacitor which can supply power to the return drive motor.

According to the gear shifting actuator provided by one embodiment of the invention, a worm gear structure is arranged on an output shaft of the return driving motor, and the return triggering gear is driven by the worm gear structure.

According to the gear shifting actuator provided by one embodiment of the invention, a return trigger gear is rotatably arranged on the torque output shaft, and the first locking piece and the second locking piece are driven to be mutually unlocked through the rotation of the return trigger gear.

According to one embodiment of the invention, a gear shift actuator is provided, wherein a first wedge part is fixedly connected with a first locking piece, a second wedge part is fixedly connected with a return trigger gear, the first wedge part and the second wedge part are spaced from each other when the first locking piece and the second locking piece are locked with each other, and when the return trigger gear rotates, the second wedge part is contacted with the first wedge part to enable the first locking piece to move downwards, so that the first locking piece and the second locking piece are unlocked with each other.

The invention further relates to a gearbox having such a shift actuator. The gearbox with the gear shift actuator according to the invention can thus have the advantages as described above.

The beneficial effects of the invention include: by controlling the unlocking or locking of the first locking piece and the second locking piece, the function of returning to a safe gear can be provided in a simple mode while the gear shifting of the gearbox is carried out, and therefore the safety of a vehicle is guaranteed.

Drawings

The disclosure of the present invention is illustrated with reference to the accompanying drawings. It is to be understood that the drawings are designed solely for the purposes of illustration and not as a definition of the limits of the invention. In the drawings, like reference numerals are used to refer to like parts. Wherein:

fig. 1 schematically shows a gear shift actuator according to an embodiment of the invention, in which a first and a second locking element are locked to each other;

FIG. 2 schematically illustrates the shift actuator of FIG. 1 from another perspective;

FIG. 3 schematically illustrates the shift actuator of FIG. 1 with the second wedge on the return trigger gear just beginning to contact the first wedge on the first lock member;

FIG. 4 schematically illustrates the shift actuator of FIG. 1 with the first and second lock members unlocked from one another;

FIG. 5 schematically illustrates the shift actuator of FIG. 1 in a top view;

fig. 6 schematically shows a part of the shift actuator in fig. 1.

Detailed Description

It is easily understood that according to the technical solution of the present invention, a person skilled in the art can propose various alternative structures and implementation ways without changing the spirit of the present invention. Therefore, the following detailed description and the accompanying drawings are merely illustrative of the technical aspects of the present invention, and should not be construed as all of the present invention or as limitations or limitations on the technical aspects of the present invention.

The terms of orientation of up, down, left, right, front, back, top, bottom, and the like referred to or may be referred to in this specification are defined relative to the configuration shown in the drawings, and are relative terms, and thus may be changed correspondingly according to the position and the use state of the device. Therefore, these and other directional terms should not be construed as limiting terms.

In the following description, various parameters and components are described for different configurations of embodiments, and these specific parameters and components are only by way of example and do not limit the embodiments of the present application.

An embodiment according to the invention is shown in connection with fig. 1 to 6, in which it can be seen that: the gear shifting actuator comprises a main torque input gear 1 for receiving driving torque input to the gear shifting actuator; a torque output shaft 2 that performs a gear shift operation of the transmission using the drive torque; an energy storage spring 3 disposed between the main torque input gear and the torque output shaft; a first lock 4 fixedly connected to the main torque input gear; and a second locking member 5 fixedly connected to the torque output shaft; the first lock member and the second lock member can be locked and unlocked with each other. When the first locking piece and the second locking piece are locked with each other, the energy storage spring is in a compressed state, and the driving torque can be transmitted to the torque output shaft through the main torque input gear, the first locking piece and the second locking piece; when the first locking piece and the second locking piece are mutually unlocked, the torque output shaft performs gear shifting operation of the gearbox under the action of the energy storage spring.

The shift actuator may be coupled to the vehicle transmission by a fastener and the shift between the different gears may be accomplished by rotating a transmission shift shaft. The internal part of the gearbox provides a torque value required by driving a rotating shaft of the gearbox through a motor and a torque output gear set. The shift actuator may also provide a self-return function mechanism independent of the main drive module that automatically returns to park under the influence of the controller in the event of a failure of the main drive module while providing the function of performing a normal shift.

As shown in fig. 1, the first lock member 4 and the second lock member 5 are locked together by the lock tongue 41 and the lock structure of the recess 51, and then fixed together to the main torque input gear 1. One end of the stored energy spring is fixed to the second latch structure as shown in fig. 2, and the other end of the stored energy spring is fixed to the main torque input gear 1 as shown in fig. 1.

During normal gear shifting, the main driving motor 6 rotates under the driving of the motor driving circuit and outputs torque, then the torque is transmitted to the main torque input gear 1 through the torque transmission gear 11, the main torque input gear 1 rotates to drive the first locking piece 4 and the second locking piece 5 which are fixed on the main torque input gear 1 to rotate, and the second locking piece 5 is connected with the torque output shaft 2, so that the torque output shaft 2 is driven to rotate, and the torque output is realized, as shown in fig. 1.

When the automatic return requirement is triggered (for example, when the automatic return requirement is failed), the return driving motor 7 is driven by the driving circuit to rotate, and the return triggering transmission gear is driven to rotate by the worm gear structure 10 connected to the return driving motor, so that the return triggering gear 9 is driven to rotate, as shown in fig. 5. After the second wedge-shaped portion 91 of the return trigger gear 9 contacts the first wedge-shaped portion 42 of the first lock member 4, as shown in fig. 3, the first lock member 4 continues to rotate, and the first lock member 4 moves downward under the pushing of the second wedge-shaped portion 91 of the return trigger gear 9, and when the latch tongue 41, which moves downward to the first lock member 4, is disengaged from the groove 51 of the second lock member 5, the second lock member 5 is disengaged from the first lock member 4 and the main torque input gear 1, as shown in fig. 4, the second fixed end 32 of the energy storage spring 3 is fixed to the main torque input gear, and the main torque input gear is in a fixed position and does not rotate under the action of the reaction torque of the main driving motor. The first fixed end 31 of the charging spring is connected to the second locking member 5, so that the disengaged second locking member 5 is rotated by the first fixed end 31 of the charging spring until the park position is reached.

When the first and

second locking members

4 and 5 are released, the structure needs to be reset to ensure that the structure can be used normally next time. When resetting, the main driving motor 6 rotates to drive the main torque input gear and the first locking piece connected with the main torque input gear to rotate until the bolt 41 of the first locking piece 4 rotates to be consistent with the position of the groove 51 of the second locking piece 5, the first locking piece 4 and the second locking piece 5 are locked, and resetting is completed.

In order to ensure that the vehicle can return to the parking gear under the condition of power failure, the safety of the vehicle is ensured. As shown in fig. 6, an energy storage capacitor 8 is integrated inside the gear shifting actuator, and when the vehicle is powered off, the energy storage capacitor 8 can still provide energy required by the action of the unlocking motor. The electric quantity of the energy storage capacitor can be monitored, and when the electric quantity drops below a safety value, the system can automatically start a charging program to ensure that the electric quantity of the energy storage capacitor is above the safety value.

The invention also comprises a gearbox with a gear shift actuator according to one or more of the embodiments described above, which therefore has the technical features and effects corresponding to the above description and therefore will not be described in detail here.

The technical scope of the present invention is not limited to the above description, and those skilled in the art can make various changes and modifications to the above-described embodiments without departing from the technical spirit of the present invention, and such changes and modifications should fall within the protective scope of the present invention.

Claims

1. A shift actuator, comprising:

a first lock fixedly connected to the main torque input gear; and

a second locking member fixedly connected to the torque output shaft;

2. The shift actuator of claim 1, wherein the torque output shaft moves the transmission into park under the influence of the stored energy spring when the first and second lock members are unlocked from one another.

3. The shift actuator of claim 1, wherein the shift actuator includes a main drive motor for providing drive torque to the main torque input gear.

4. The shift actuator of claim 1, wherein the first latch member has a latch tongue and the second latch member has a recess, and wherein the first and second latch members are latched and unlatched from each other by engagement of the latch tongue and the recess.

5. The shift actuator of claim 1, including a return drive motor for driving the first and second lock members to unlock each other.

6. The shift actuator of claim 5, wherein the shift actuator includes an energy storage capacitor configured to supply power to the return drive motor.

7. The shift actuator according to claim 1, characterized in that a return trigger gear is rotatably arranged on the torque output shaft, and the first and second locking members are mutually unlocked by rotation of the return trigger gear.

8. The shift actuator according to claim 7, wherein a worm gear structure is provided at an output shaft of the return drive motor, through which the return trigger gear is driven.

9. The shift actuator of claim 7, wherein a first wedge portion is fixedly coupled to the first lock member and a second wedge portion is fixedly coupled to the return trigger gear, the first and second wedge portions being spaced apart from each other when the first and second lock members are locked to each other, the second wedge portion contacting the first wedge portion when the return trigger gear is rotated to move the first lock member downward such that the first and second lock members are unlocked from each other.

10. A gearbox comprising a shift actuator according to any one of claims 1 to 9.