CN112049925A - Axle-hung type automobile drive-by-wire gear shifting actuator and automobile gear shifting system - Google Patents
Axle-hung type automobile drive-by-wire gear shifting actuator and automobile gear shifting system Download PDFInfo
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- CN112049925A CN112049925A CN202010824124.7A CN202010824124A CN112049925A CN 112049925 A CN112049925 A CN 112049925A CN 202010824124 A CN202010824124 A CN 202010824124A CN 112049925 A CN112049925 A CN 112049925A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/02—Selector apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
- F16H61/0204—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
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Abstract
The invention discloses an axle-clasping type automobile shift-by-wire actuator and an automobile shifting system, wherein the axle-clasping type automobile shift-by-wire actuator is provided with a motor, a primary transmission assembly, a small-tooth-difference planetary gear transmission assembly, an axle-clasping output assembly and a sensing control assembly which are arranged in a shell, and the axle-clasping type automobile shift-by-wire actuator can be independently arranged outside an automatic gearbox to form the automobile shifting system together with a shifter, a shift controller and the automatic gearbox, so that the actuator can be suitable for automobile shifting systems of different automobile types; moreover, the actuator executes gear shifting control on the automatic gearbox according to the control signal, feeds back a correspondingly generated rotating position signal to the gear shifting controller, and is connected with the rotating support and the connecting shaft through the rubber shock pad, so that impact of gear shifting on the automatic gearbox is reduced by using the rubber shock pad, therefore, the invention can save the occupation of the automobile gear shifting system on the arrangement space of the whole automobile, improve the gear shifting operation hand feeling and comfortableness, and reduce the gear shifting noise.
Description
Technical Field
The invention relates to an automobile gear shifting device, in particular to a shaft-clasping type automobile shift-by-wire actuator and an automobile gear shifting system.
Background
The automatic transmission gear-shifting control of the traditional automobile basically adopts a mode of mechanical cable flexible shaft control, a gear-shifting actuator is designed inside the automatic transmission, the mechanical cable flexible shaft and the control rocker arm of the automatic transmission are likely to change for different automobile models, and the transmission structure needs to be redesigned according to the arrangement requirement of the whole automobile. The cable flexible shaft needs to penetrate through a central control area, a vehicle body floor, a front cabin and the like of the whole vehicle, has certain requirements on a space area, and occupies the arrangement space of the whole vehicle. Meanwhile, in the control mode of the inhaul cable flexible shaft, the inhaul cable is required to provide certain gear shifting force and gear shifting stroke for a control rocker arm of the automatic transmission, the gear shifting force and the gear shifting stroke are required to be provided by the gear shifter through the inhaul cable flexible shaft, and the gear shifter is required to be made into a larger volume shape. In addition, the cable flexible axle can produce frictional force and have the clearance of shifting, and the influence is shifted and is felt, and the vibration of derailleur can pass through cable, selector transmission moreover and transmit for the driver, influences the travelling comfort.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the utility model provides a shaft-embracing type car drive-by-wire shift executor and car shift system.
The technical scheme adopted by the invention is as follows:
the utility model provides a shaft-embracing type car drive-by-wire executor of shifting, its characterized in that installs in the casing:
the planetary gear of the small tooth difference planetary gear transmission assembly is driven by a motor through a primary transmission assembly to move in a plane;
the shaft-clasping output assembly comprises a rotary support and a connecting shaft which are respectively in rotatable fit with the shell; the rotating support is provided with a support middle hole, a connecting shaft positioning groove and a position sensing mounting groove which are coaxial and are sequentially arranged from inside to outside, and an output shaft of the small-tooth-difference planetary gear transmission assembly is inserted into the support middle hole to drive the rotating support to rotate; the top of the connecting shaft is provided with a shaft holding hole which is suitable for the TCU control shaft to be embedded, the bottom of the side wall of the connecting shaft is provided with a rubber shock pad, the rubber shock pad comprises a plurality of rubber convex blocks which are arranged around the axis of the connecting shaft, and the rubber shock pad is embedded in the connecting shaft positioning groove;
sensing control assembly, including annular circuit board, by response piece and signal power supply contact pin, by the response piece fix in the position sensing mounting groove, annular circuit board fix in the casing and with rotatory support is coaxial, the signal power supply contact pin respectively with motor and annular circuit board electric connection for: the power supply accessed through the signal power supply contact pin can supply power to the motor; the annular circuit board can drive the motor to rotate forwards or backwards according to a control signal input by the signal power supply contact pin so as to drive the rotating support and the connecting shaft to rotate by corresponding angles through the primary transmission assembly and the small-tooth-difference planetary gear transmission assembly; the annular circuit board can sense the rotating position of the sensed piece and send out a corresponding generated rotating position signal through the signal power supply contact pin, and the rotating position of the sensed piece is also equivalent to the rotating positions of the rotating support and the connecting shaft;
the shaft holding hole and the signal power supply contact pin are exposed to the outside of the shell.
Therefore, the axle-hung type automobile shift-by-wire actuator can be independently arranged outside the automatic gearbox to form an automobile gear shifting system together with the gear shifter, the gear shifting controller and the automatic gearbox, so that the axle-hung type automobile shift-by-wire actuator can be suitable for automobile gear shifting systems of different automobile types, and the problem of poor universality of a matching platform between the automobile gear shifter and the automatic gearbox is solved;
in addition, the axle-hung type automobile shift-by-wire actuator executes the shift control of the automatic gearbox according to the control signal, feeds back the correspondingly generated rotation position signal to the shifter through the shift controller, and connects the rotating support and the connecting shaft through the rubber shock pad, so that the impact of the shift on the automatic gearbox is reduced by utilizing the rubber shock pad, therefore, the invention can save the occupation of the automobile shift system on the arrangement space of the whole automobile, improve the shift operation hand feeling and comfortableness, and reduce the shift noise.
Preferably: the rubber bump is a fan-shaped bump with a large outer part and a small inner part so as to improve the buffering and damping performance of the rubber damping pad.
Preferably: the connecting shaft is sleeved with an O-shaped rubber ring in interference fit with the shell to play a waterproof role.
Preferably: the support mesopore and embrace the axle hole and be the two D shape holes that constitute by two relative arc surfaces and two relative planes, the output shaft and the TCU control shaft of the poor planetary gear transmission assembly of few tooth are respectively for the adaptation in the support mesopore and embrace the two D shape axles in axle hole to ensure that the output shaft and the rotatory support of the poor planetary gear transmission assembly of few tooth can synchronous revolution, connecting axle and TCU control shaft can synchronous revolution.
The O-shaped rubber ring and the rubber shock pad are preferably made of high-temperature-resistant rubber. The rubber shock pad is preferably integrally formed with the connecting shaft by adopting rubber coating forming processing. The induced part preferably adopts a plurality of pairs of N-S magnetic poles, and the annular circuit board correspondingly adopts Hall components to perform rotary position induction.
As a preferred embodiment of the present invention: the small-tooth-difference planetary gear transmission assembly consists of a planetary gear, an inner gear ring, a mandrel and an output shaft disc, the primary transmission assembly is provided with an eccentric shaft, the top surface of the planetary gear is provided with a plurality of pin columns which are arranged around the planetary gear at intervals in the axial direction, the output shaft disc consists of an output disc and the output shaft which is coaxially arranged on the top surface of the output disc, the output disc is provided with an output disc hole corresponding to each pin column, the eccentric shaft consists of a small-diameter upper shaft part and a large-diameter lower shaft part which are coaxially arranged, and the eccentric shaft is provided with an eccentric hole; the pin column can be a convex column which is integrally formed with the planetary gear, and can also be a pin shaft which is fixedly connected to the planetary gear;
the inner gear ring is fixedly connected with the shell; a gear shaft sleeve is pressed into the middle hole of the planetary gear in an interference fit manner, the gear shaft sleeve is rotatably matched with the small-diameter upper shaft part, the planetary gear and the gear shaft sleeve are positioned on the top surface of the large-diameter lower shaft part, and the planetary gear is meshed with the inner gear ring to form a planetary gear pair with small tooth difference; the upper end of the mandrel is in interference fit with the middle hole of the output disc, the mandrel is in rotatable fit with the eccentric hole of the eccentric shaft, the lower end of the mandrel is in rotatable fit with the shell, and each pin of the planetary gear extends into the corresponding output disc hole of the output disc; the motor can drive the eccentric shaft to rotate around the axis of the eccentric hole;
the radius of the output disc hole is larger than that of the pin, and is equal to the sum of the radius of the pin and the center distance between the inner gear ring and the planetary gear and equal to the sum of the radius of the pin and the eccentric distance between the axis of the eccentric hole and the axis of the eccentric shaft.
Therefore, the planetary gear does plane motion of revolution and rotation around the mandrel simultaneously under the limitation of the inner gear ring by the driving of the motor through the eccentric shaft, and the pin of the planetary gear is always in contact with the output disc hole of the output shaft disc due to the fact that the radius of the output disc hole is equal to the sum of the radius of the pin and the center distance between the inner gear ring and the planetary gear and is equal to the sum of the radius of the pin and the eccentric distance of the axis of the eccentric hole relative to the axis of the eccentric shaft, so that the output shaft disc does not follow the planetary gear to do plane motion, but only remains to do circular motion around the axis of the mandrel, and power is transmitted to the rotary support through the output shaft of the output shaft disc.
Preferably: the motor is a brush motor; the primary transmission assembly further comprises a worm and a helical gear; two ends of the worm are rotatably matched with the shell, a motor shaft of the motor is provided with a thread rolling structure, and the motor shaft of the motor is inserted into a middle hole of the worm and is in interference fit so as to ensure that the two rotate synchronously; the eccentric shaft is fixedly arranged on the end face of the helical gear, an eccentric hole of the eccentric shaft is coaxially communicated with a middle hole of the helical gear, and the lower end of the mandrel penetrates through the eccentric hole of the eccentric shaft and the middle hole of the helical gear in sequence and then is rotatably matched with the shell; the helical gear is meshed with the worm. The eccentric shaft and the helical gear are preferably integrally formed by injection molding of engineering plastics.
Therefore, the motor drives the helical gear and the eccentric shaft to rotate through the worm, so that the eccentric shaft drives the planetary gear to perform plane motion.
Therefore, the invention adopts the brush motor and the primary transmission assembly consisting of the worm, the helical gear and the eccentric shaft, can more accurately drive the rotating position of the connecting shaft, and can increase the torque and reduce the rotating speed of the eccentric shaft through the primary transmission assembly, namely the input rotating speed of the planetary gear transmission assembly with small tooth difference, so that the dynamic balance effect of the eccentric shaft is relatively good, the vibration and the noise of an actuator can be favorably reduced, and the worm and the helical gear can be matched to realize self-locking under the condition of demand.
Preferably: the shell consists of an upper shell, a middle shell and a lower shell; the machine body of the motor is placed on a motor supporting and positioning structure of the lower shell, two ends of the worm are respectively provided with a square shaft sleeve, the two square shaft sleeves are placed on the worm supporting and positioning structure of the lower shell, so that two ends of the worm can be rotatably matched with the shell, the middle shell and the lower shell are fixedly connected through screws, the motor and the primary transmission assembly are covered in a mounting cavity formed by the middle shell and the lower shell, and the machine body of the motor and the two square shaft sleeves are fixed to prevent the motor from rotating and shaking along the circumferential direction and prevent a motor shaft from moving along the axial direction, wherein the square shaft sleeves are in non-circular square or rectangular shapes and the like and are used for preventing the square shaft sleeves from rotating; and the annular gear positioning groove structure on the lower shell extends out of the upper part of the middle shell.
Preferably: the inner gear ring is clamped and fixed on an inner gear ring positioning groove structure of the lower shell through a clamping block on the outer edge of the inner gear ring, and the lower end of the mandrel is rotatably matched with a mandrel positioning hole on the lower shell; the upper shell is provided with an output hole and a shaft sleeve mounting groove, the output hole and the shaft sleeve mounting groove are respectively provided with a connecting shaft sleeve and a rotating support shaft sleeve which are in interference fit with the output hole and the shaft sleeve mounting groove, the annular circuit board is fixed in the upper shell through screws, the upper shell and the lower shell are fixedly connected through screws, the small tooth difference planetary gear transmission assembly, the shaft-holding output assembly, the sensing control assembly and the middle shell are covered in a mounting cavity formed by the upper shell and the lower shell, the rotating support is positioned in a shaft sleeve matching groove outside the position sensing mounting groove and is in rotatable fit with the rotating support shaft sleeve, and the connecting shaft is in rotatable fit with the connecting shaft sleeve; and a sealing ring is arranged between the upper shell and the lower shell, and the sealing ring is preferably made of high-temperature-resistant rubber materials.
The gear shaft sleeve, the connecting shaft sleeve and the rotary support shaft sleeve can be formed by injection molding of wear-resistant and heat-resistant engineering plastics or by rolling rolled steel, and meanwhile, the inner surface of the shaft sleeve is coated with a wear-resistant engineering plastic coating or can be formed by sintering powder metallurgy.
Preferably: and the bottom of the lower shell is provided with a ventilation plug to play a role in exhausting.
The utility model provides an automobile gear shifting system, includes selector, shift controller, shift actuator and automatic transmission, its characterized in that: the gear shifting actuator is the shaft-clasping type automobile shift-by-wire actuator, a shell of the shaft-clasping type automobile shift-by-wire actuator is fixed with a box body of the automatic gearbox, and a TCU control shaft of the automatic gearbox is embedded in a shaft-clasping hole of the shaft-clasping type automobile shift-by-wire actuator; after a gear signal generated by a driver operating the gear shifter is converted into a control signal through the gear shifting controller, the control signal is input into an annular circuit board through a signal power supply contact pin of the axle-type automobile shift-by-wire actuator, so that a connecting shaft of the axle-type automobile shift-by-wire actuator can drive a TCU (transmission control unit) control shaft of the automatic gearbox to rotate by a corresponding angle, and the automatic gearbox is controlled to be switched to a corresponding gear; and the annular circuit board feeds back the correspondingly generated rotation position signal to the gear shifting controller.
In addition, the present invention preferably employs the following parameters to achieve optimal operational reliability and performance:
the parameters of the worm are: the modulus is 1.6mm, the number of teeth is 1, the pressure angle is 20 degrees, the helix angle is 85.485 degrees, the modification coefficient is-0.6686, the diameter of a addendum circle is 21.384mm, the diameter of a dedendum circle is 13.955mm, and the tooth thickness is 1.735 mm;
the parameters of the helical gear are as follows: the modulus is 1.6mm, the number of teeth is 15, the pressure angle is 20 degrees, the helix angle is 4.8321 degrees, the modification coefficient is 0.25, the diameter of a addendum circle is 28.084mm, the diameter of a dedendum circle is 20.655mm, and the tooth thickness is 2.798 mm;
the parameters of the planetary gear are: the modulus is 1.4mm, the number of teeth is 21, the pressure angle is 20 degrees, the modification coefficient is-0.0562, the diameter of a tip circle is 31.05mm, the diameter of a root circle is 26.81mm, and the tooth thickness is 2.142 mm;
the parameters of the inner gear ring are as follows: modulus 1.4mm, number of teeth 23, pressure angle 20 °, deflection coefficient 0.1652, tip circle diameter 30.93mm, root circle diameter 34.99mm, tooth thickness 2.031 mm.
Compared with the prior art, the invention has the following beneficial effects:
the axle-type automobile shift-by-wire actuator is provided with a motor, a primary transmission assembly, a small-tooth-difference planetary gear transmission assembly, an axle-type output assembly and a sensing control assembly, wherein the motor, the primary transmission assembly, the small-tooth-difference planetary gear transmission assembly, the axle-type output assembly and the sensing control assembly are arranged in a shell and can be independently arranged outside an automatic gearbox to form an automobile shifting system together with a shifter, a shifting controller and the automatic gearbox, so that the axle-type automobile shift-by-wire actuator can be suitable for automobile shifting systems of different automobile models, and the problem of poor universality of a matching platform between the automobile shifter and the automatic gearbox is solved;
in addition, the axle-hung type automobile shift-by-wire actuator executes the shift control of the automatic gearbox according to the control signal, feeds the corresponding generated rotation position signal to the shift controller, and is connected with the rotating support and the connecting shaft through the rubber shock pad, so that the impact of the shift on the automatic gearbox is reduced by using the rubber shock pad, therefore, the invention can save the occupation of an automobile shift system on the arrangement space of the whole automobile, improve the shift operation hand feeling and comfortableness, and reduce the shift noise.
Secondly, the axle-type automobile shift-by-wire actuator adopts a small-tooth-difference planetary gear transmission assembly consisting of a planetary gear, an inner gear ring, a mandrel and an output shaft disc, and has the advantages of large transmission ratio, large output torque, compact structure, small volume, light weight, convenience in processing, reliability in operation, long service life and coaxial output.
Thirdly, the invention adopts the brush motor and the primary transmission assembly consisting of the worm, the helical gear and the eccentric shaft, can more accurately drive the rotating position of the connecting shaft, and can increase the torque and reduce the rotating speed of the eccentric shaft through the primary transmission assembly, namely the input rotating speed of the planetary gear transmission assembly with small tooth difference, so that the dynamic balance effect of the eccentric shaft is relatively good, the vibration and the noise of an actuator can be favorably reduced, and the worm and the helical gear can be matched to realize self-locking under the condition of demand.
Drawings
The invention is described in further detail below with reference to the following figures and specific examples:
FIG. 1 is a schematic structural diagram of a vehicle shift system according to the present invention;
FIG. 2 is a schematic structural diagram of a shaft embracing type automobile shift-by-wire actuator according to the present invention;
FIG. 3 is an exploded view of a structure of a spindle type automobile shift-by-wire actuator according to the present invention;
FIG. 4 is a top view of a wrap-around automotive shift-by-wire actuator of the present invention;
FIG. 5 is a cross-sectional view I-I of FIG. 4;
FIG. 6 is a sectional view II-II of FIG. 4;
FIG. 7 is a schematic view of a rotary support in the present invention;
FIG. 8 is a schematic structural view of a connecting shaft according to the present invention;
FIG. 9 is a schematic structural view of an upper housing according to the present invention;
FIG. 10 is a schematic structural view of a middle housing according to the present invention;
fig. 11 is a schematic structural view of the lower case of the present invention.
Detailed Description
The present invention will be described in detail with reference to the following embodiments and the accompanying drawings to help those skilled in the art to better understand the inventive concept of the present invention, but the scope of the claims of the present invention is not limited to the following embodiments, and all other embodiments obtained without inventive efforts by those skilled in the art will fall within the scope of the present invention without departing from the inventive concept of the present invention.
In the description of the present invention, it is to be understood that the terms "upper, middle, lower, top, bottom" and "upper" are used merely for convenience of description and to simplify the description, and do not indicate or imply any particular orientation required by the present invention and therefore should not be considered as limiting the present invention.
Example one
As shown in fig. 1 to 11, the invention discloses a shaft-clasping type automobile shift-by-wire actuator, wherein a shell a is internally provided with:
the planetary gear D1 of the small tooth difference planetary gear transmission assembly D is driven by a motor B through a primary transmission assembly C to do planar motion;
the shaft-embracing output assembly E comprises a rotary support E1 and a connecting shaft E2 which are respectively in rotatable fit with the shell A; the rotary support E1 is provided with a support middle hole E1a, a connecting shaft positioning groove E1b and a position sensing installation groove E1c which are coaxial and sequentially arranged from inside to outside, and an output shaft D4-1 of the small-tooth-difference planetary gear transmission assembly D is inserted into the support middle hole E1a to drive the rotary support E1 to rotate; the top of the connecting shaft E2 is provided with a shaft embracing hole E2a which is adapted to the embedding of a TCU control shaft G, the bottom of the side wall of the connecting shaft E2 is provided with a rubber shock pad E3, the rubber shock pad E3 comprises a plurality of rubber bumps E3-1 which are arranged around the axis of the connecting shaft E2, and the rubber shock pad E3 is embedded in the connecting shaft positioning groove E1 b;
the sensing control assembly F comprises an annular circuit board F1, a sensed piece F2 and a signal power supply pin F3, wherein the sensed piece F2 is fixed in the position sensing mounting groove E1c, the annular circuit board F1 is fixed in the shell A and is coaxial with the rotary support E1, and the signal power supply pin F3 is respectively and electrically connected with the motor B and the annular circuit board F1, so that: the power supply accessed through the signal power supply contact pin F3 can supply power for the motor B; the annular circuit board F1 can drive the motor B to rotate forwards or backwards according to the control signal input by the signal power supply pin F3, so that the rotary support E1 and the connecting shaft E2 are driven to rotate by corresponding angles through the primary transmission assembly C and the small-tooth-difference planetary gear transmission assembly D; the annular circuit board F1 can sense the rotation position of the sensed piece F2 and send out a corresponding generated rotation position signal through the signal power pin F3, and the rotation position of the sensed piece F2 also corresponds to the rotation position of the rotation support E1 and the connecting shaft E2;
the axle-holding hole E2a and the signal power supply pin F3 are exposed to the outside of the shell A.
The invention also discloses an automobile gear shifting system, which comprises a gear shifter, a gear shifting controller, a gear shifting actuator and an automatic gearbox, wherein the gear shifting actuator is the shaft-clasping type automobile shift-by-wire actuator, a shell A of the shaft-clasping type automobile shift-by-wire actuator is fixed with a box body of the automatic gearbox, and a TCU control shaft G of the automatic gearbox is embedded in a shaft-clasping hole E2a of the shaft-clasping type automobile shift-by-wire actuator; after a gear signal generated by a driver operating the gear shifter is converted into a control signal through the gear shifting controller, a signal power supply contact pin F3 of the axle type automobile shift-by-wire actuator is input into an annular circuit board F1, so that a connecting shaft E2 of the axle type automobile shift-by-wire actuator can drive a TCU control shaft G of the automatic gearbox to rotate by a corresponding angle to control the automatic gearbox to be switched to a corresponding gear; also, the annular circuit board F1 feeds back a correspondingly generated rotational position signal to the shift controller.
Therefore, the axle-hung type automobile shift-by-wire actuator can be independently arranged outside the automatic gearbox to form an automobile gear shifting system together with the gear shifter, the gear shifting controller and the automatic gearbox, so that the axle-hung type automobile shift-by-wire actuator can be suitable for automobile gear shifting systems of different automobile types, and the problem of poor universality of a matching platform between the automobile gear shifter and the automatic gearbox is solved;
in addition, the axle-hung type automobile shift-by-wire actuator executes the shift control of the automatic gearbox according to the control signal, feeds back the correspondingly generated rotation position signal to the shift controller, and is connected with the rotating support E1 and the connecting shaft E2 through the rubber shock pad E3, so that the impact of the shift on the automatic gearbox is reduced by using the rubber shock pad E3, therefore, the automobile shift-by-wire actuator can save the occupation of the whole automobile arrangement space by an automobile shift system, improve the shift operation hand feeling and comfort and reduce the shift noise.
The above is a basic implementation manner of the first embodiment, and further optimization, improvement and limitation may be performed on the basis of the basic implementation manner:
preferably: the rubber bump E3-1 is a fan-shaped bump with a large outer part and a small inner part so as to improve the buffering and damping performance of the rubber damping pad E3.
Preferably: the connecting shaft E2 is sleeved with an O-shaped rubber ring E4 in interference fit with the shell A, so that a waterproof effect is achieved.
Preferably: the support middle hole E1a and the axle-embracing hole E2a are double D-shaped holes formed by two opposite arc surfaces and two opposite planes, an output shaft D4-1 and a TCU control shaft G of the small tooth difference planetary gear transmission assembly D are double D-shaped shafts respectively matched with the support middle hole E1a and the axle-embracing hole E2a so as to ensure that the output shaft D4-1 and the rotary support E1 of the small tooth difference planetary gear transmission assembly D can synchronously rotate, and the connecting shaft E2 and the TCU control shaft G can synchronously rotate.
The O-shaped rubber ring E4 and the rubber shock pad E3 are preferably made of high-temperature-resistant rubber. The rubber shock pad E3 is preferably integrated with the connecting shaft E2 by adopting an over-molding process. The sensed piece F2 preferably adopts a plurality of pairs of N-S magnetic poles, and the annular circuit board F1 correspondingly adopts Hall components to sense the rotating position.
Example two
On the basis of the first embodiment, the second embodiment also adopts the following preferred embodiments:
the small-tooth-difference planetary gear transmission assembly D consists of a planetary gear D1, an inner gear ring D2, a mandrel D3 and an output shaft disc D4, the primary transmission assembly C is provided with an eccentric shaft C3, the top surface of the planetary gear D1 is provided with a plurality of pin columns D1-1 which are arranged at intervals around the axial direction of the primary transmission assembly C, the output shaft disc D4 consists of an output disc D4-2 and an output shaft D4-1 which is coaxially arranged on the top surface of the output disc D4-2, the output disc D4-2 is provided with an output disc hole D4-2a corresponding to each pin column D1-1, the eccentric shaft C3 consists of a small-diameter upper shaft part C3-1 and a large-diameter lower shaft part C3-2 which are coaxially arranged, and the eccentric shaft C3 is provided with an eccentric hole C3 a; the pin D1-1 may be a convex column integrally formed with the planetary gear D1, or a pin shaft connected and fixed to the planetary gear D1;
the inner gear ring D2 is fixedly connected with the shell A; a gear shaft sleeve D5 is pressed into a middle hole of the planetary gear D1 in an interference fit manner, the gear shaft sleeve D5 is rotatably matched with the small-diameter upper shaft part C3-1, the planetary gear D1 and the gear shaft sleeve D5 are located on the top surface of the large-diameter lower shaft part C3-2, and the planetary gear D1 is meshed with the inner gear ring D2 to form a small-tooth-difference planetary gear pair; the upper end of the mandrel D3 is in interference fit with the middle hole of the output disc D4-2, the mandrel D3 is in rotatable fit with the eccentric hole C3a of the eccentric shaft C3, the lower end of the mandrel D3 is in rotatable fit with the shell A, and each pin D1-1 of the planetary gear D1 extends into the corresponding output disc hole D4-2a of the output disc D4-2; the motor B can drive the eccentric shaft C3 to rotate around the axis of the eccentric hole C3 a;
the radius of the output disc hole D4-2a is larger than that of the pin D1-1, and the radius of the output disc hole D4-2a is equal to the sum of the radius of the pin D1-1 and the center distance between the inner gear ring D2 and the planetary gear D1, and is equal to the sum of the radius of the pin D1-1 and the eccentric distance of the axis of the eccentric hole C3a relative to the axis of the eccentric shaft C3.
Thus, driven by the motor B through the eccentric shaft C3, the planet gears D1 make plane motions of revolution and rotation around the mandrel D3 simultaneously under the restriction of the ring gear D2, and since the radius of the output disc hole D4-2a is equal to the sum of the radius of the pin D1-1 and the center distance between the ring gear D2 and the planetary gear D1, and is equal to the sum of the radius of the pin D1-1 and the eccentricity of the axis of the eccentric hole C3a with respect to the axis of the eccentric shaft C3, so that the pin D1-1 of the planetary gear D1 is always kept in contact with the output disk hole D4-2a of the output shaft disk D4, under the action of the force, the output shaft disk D4 does not follow the plane motion of the planet gear D1, but only keeps circular motion around the axis of the mandrel D3, thereby transmitting power to the rotary support E1 through the output shaft D4-1 of the output shaft disk D4.
The above is the basic implementation manner of the second embodiment, and further optimization, improvement and limitation can be made on the basis of the basic implementation manner:
preferably: the motor B is a brush motor; the primary transmission assembly C also comprises a worm C1 and a bevel gear C2; two ends of the worm C1 are rotatably matched with the shell A, a motor shaft of the motor B is provided with a thread rolling structure, and the motor shaft of the motor B is inserted into a central hole of the worm C1 and is in interference fit with the central hole, so that the two can synchronously rotate; the eccentric shaft C3 is fixedly arranged on the end face of the helical gear C2, an eccentric hole C3a of the eccentric shaft C3 is coaxially communicated with a middle hole of the helical gear C2, and the lower end of the mandrel D3 passes through the eccentric hole C3a of the eccentric shaft C3 and the middle hole of the helical gear C2 in sequence and then is in rotatable fit with the shell A; the bevel gear C2 is meshed with the worm C1. The eccentric shaft C3 and the bevel gear C2 are preferably integrally formed by injection molding of engineering plastics.
Accordingly, the motor B drives the helical gear C2 and the eccentric shaft C3 to rotate through the worm gear C1, so that the eccentric shaft C3 drives the planetary gear D1 to perform a planar motion.
Therefore, the invention adopts the brush motor and the primary transmission assembly C consisting of the worm C1, the helical gear C2 and the eccentric shaft C3, can more accurately drive the rotation position of the connecting shaft E2, can increase the torque and reduce the rotation speed of the eccentric shaft C3, namely the input rotation speed of the planetary gear transmission assembly D with small tooth difference, so that the dynamic balance effect of the eccentric shaft C3 is relatively good, the vibration and the noise of an actuator are favorably reduced, and the worm C1 and the helical gear C2 can be matched to realize self-locking under the condition of demand.
Preferably: the shell A consists of an upper shell A1, a middle shell A2 and a lower shell A3; the body of the motor B is placed on a motor supporting and positioning structure A3a of the lower shell A3, two ends of the worm C1 are respectively provided with a square shaft sleeve C4, the two square shaft sleeves C4 are placed on a worm supporting and positioning structure A3B of the lower shell A3, so that two ends of the worm C1 are in rotatable fit with the shell A, the middle shell A2 and the lower shell A3 are fixedly connected through screws, the motor B and a primary transmission assembly C are covered in a mounting cavity formed by the middle shell A2 and the lower shell A3, the body of the motor B and the two square shaft sleeves C4 are fixed to prevent the motor B from rotating and shaking in the circumferential direction and prevent a motor shaft from moving in the axial direction, wherein the square shaft sleeve C4 is in a non-circular square shape or rectangular shape and the like and is used for preventing the square shaft sleeve C4 from rotating; and, the ring gear positioning slot structure A3c on the lower case A3 extends to the upper side of the middle case a 2.
Preferably: the inner gear ring D2 is clamped and fixed on an inner gear ring positioning groove structure A3c of the lower shell A3 through a clamping block D2-1 on the outer edge of the inner gear ring D2, and the lower end of the mandrel D3 is rotatably matched with a mandrel positioning hole A3D on the lower shell A3; the upper shell A1 is provided with an output hole A1a and a shaft sleeve installation groove A1b, the output hole A1a and the shaft sleeve installation groove A1b are respectively provided with a connecting shaft sleeve E5 and a rotating support shaft sleeve E6 which are in interference fit with the output hole A1a, the annular circuit board F1 is fixed in the upper shell A1 through screws, the upper shell A1 and the lower shell A3 are fixedly connected through screws, the small-tooth-difference planetary gear transmission assembly D, the shaft embracing output assembly E, the sensing control assembly F and the middle shell A2 are covered in an installation cavity formed by the upper shell A1 and the lower shell A3, the rotating support E1 is located outside the position sensing installation groove E1c, the shaft sleeve matching groove E1D and the rotating support shaft sleeve E6 are in rotating fit, and the connecting shaft E2 and the connecting shaft sleeve E5 are in rotating fit; a sealing ring a4 is arranged between the upper casing a1 and the lower casing A3, and the sealing ring a4 is preferably made of high-temperature-resistant rubber material.
The gear shaft sleeve D5, the connecting shaft sleeve E5 and the rotary support shaft sleeve E6 can be formed by injection molding of wear-resistant and heat-resistant engineering plastics, can also be formed by rolling rolled steel, and meanwhile, the inner surface of the shaft sleeve is coated with a wear-resistant engineering plastic coating or can also be formed by powder metallurgy sintering.
Preferably: the bottom of the lower shell A3 is provided with a vent plug A5 for exhausting.
In addition, the present invention preferably employs the following parameters to achieve optimal operational reliability and performance:
the parameters of the worm C1 are: the modulus is 1.6mm, the number of teeth is 1, the pressure angle is 20 degrees, the helix angle is 85.485 degrees, the modification coefficient is-0.6686, the diameter of a addendum circle is 21.384mm, the diameter of a dedendum circle is 13.955mm, and the tooth thickness is 1.735 mm;
the parameters of the helical gear C2 are: the modulus is 1.6mm, the number of teeth is 15, the pressure angle is 20 degrees, the helix angle is 4.8321 degrees, the modification coefficient is 0.25, the diameter of a addendum circle is 28.084mm, the diameter of a dedendum circle is 20.655mm, and the tooth thickness is 2.798 mm;
the parameters of the planetary gear D1 are: the modulus is 1.4mm, the number of teeth is 21, the pressure angle is 20 degrees, the modification coefficient is-0.0562, the diameter of a tip circle is 31.05mm, the diameter of a root circle is 26.81mm, and the tooth thickness is 2.142 mm;
parameters of the ring gear D2 are: modulus 1.4mm, number of teeth 23, pressure angle 20 °, deflection coefficient 0.1652, tip circle diameter 30.93mm, root circle diameter 34.99mm, tooth thickness 2.031 mm.
The present invention is not limited to the above embodiments, and various other equivalent modifications, substitutions and alterations can be made without departing from the basic technical concept of the invention as described above, according to the common technical knowledge and conventional means in the field.
Claims (10)
1. The utility model provides a shaft-embracing type car drive-by-wire executor of shifting, its characterized in that installs in its casing (A):
a small tooth difference planetary gear transmission assembly (D), wherein a planetary gear (D1) of the small tooth difference planetary gear transmission assembly is driven by a motor (B) through a primary transmission assembly (C) to do planar motion;
the shaft embracing output assembly (E) comprises a rotary support (E1) and a connecting shaft (E2), wherein the rotary support (E1) and the connecting shaft are respectively in rotatable fit with the shell (A); the rotating support (E1) is provided with a support center hole (E1a), a connecting shaft positioning groove (E1b) and a position sensing installation groove (E1c) which are coaxial and sequentially arranged from inside to outside, and an output shaft (D4-1) of the small-tooth-difference planetary gear transmission assembly (D) is inserted into the support center hole (E1a) to drive the rotating support (E1) to rotate; the top of the connecting shaft (E2) is provided with a shaft holding hole (E2a) which is adapted to the embedding of a TCU control shaft (G), the bottom of the side wall of the connecting shaft (E2) is provided with a rubber shock pad (E3), the rubber shock pad (E3) comprises a plurality of rubber bumps (E3-1) which are arranged around the axis of the connecting shaft (E2), and the rubber shock pad (E3) is embedded in the connecting shaft positioning groove (E1 b);
sensing control assembly (F), including annular circuit board (F1), by sensing piece (F2) and signal power supply pin (F3), the by sensing piece (F2) is fixed in position sensing mounting groove (E1c), annular circuit board (F1) is fixed in casing (A) and coaxial with rotatory support (E1), signal power supply pin (F3) respectively with motor (B) and annular circuit board (F1) electric connection makes: the power supply accessed through the signal power supply contact pin (F3) can supply power for the motor (B); the annular circuit board (F1) can drive the motor (B) to rotate forwards or backwards according to the control signal input by the signal power pin (F3) so as to drive the rotary support (E1) and the connecting shaft (E2) to rotate by corresponding angles through the primary transmission assembly (C) and the small-tooth-difference planetary gear transmission assembly (D); the annular circuit board (F1) can sense the rotation position of the sensed piece (F2) and send out a corresponding generated rotation position signal through the signal power supply pin (F3);
wherein, the axle holding hole (E2a) and the signal power supply pin (F3) are exposed to the outside of the shell (A).
2. The hug-axle type automobile shift-by-wire actuator according to claim 1, wherein: the rubber bump (E3-1) is a fan-shaped bump with a large outer part and a small inner part.
3. The hug-axle type automobile shift-by-wire actuator according to claim 1, wherein: the connecting shaft (E2) is sleeved with an O-shaped rubber ring (E4) in interference fit with the shell (A).
4. The hug-axle type automobile shift-by-wire actuator according to claim 1, wherein: the support center hole (E1a) and the axle-embracing hole (E2a) are double D-shaped holes formed by two opposite circular arc surfaces and two opposite planes, and an output shaft (D4-1) and a TCU control shaft (G) of the small tooth difference planetary gear transmission assembly (D) are double D-shaped shafts respectively matched with the support center hole (E1a) and the axle-embracing hole (E2 a).
5. The oral-spindle type automobile shift-by-wire actuator according to any one of claims 1 to 4, characterized in that: the small tooth difference planetary gear transmission assembly (D) consists of the planetary gear (D1), an inner gear ring (D2), a mandrel (D3) and an output shaft disc (D4), the primary transmission assembly (C) is provided with an eccentric shaft (C3), the top surface of the planet gear (D1) is provided with a plurality of pins (D1-1) which are arranged around the top surface of the planet gear at intervals in the axial direction, the output shaft disk (D4) is composed of an output disk (D4-2) and the output shaft (D4-1) coaxially arranged on the top surface of the output disk (D4-2), and the output disc (D4-2) is provided with an output disc hole (D4-2a) corresponding to each pin column (D1-1), the eccentric shaft (C3) is composed of a small-diameter upper shaft part (C3-1) and a large-diameter lower shaft part (C3-2) which are coaxially arranged, and the eccentric shaft (C3) is provided with an eccentric hole (C3 a);
the inner gear ring (D2) is fixedly connected with the shell (A); a gear shaft sleeve (D5) is pressed into a central hole of the planetary gear (D1) in an interference fit manner, the gear shaft sleeve (D5) is rotatably matched with the small-diameter upper shaft part (C3-1), the planetary gear (D1) and the gear shaft sleeve (D5) are located on the top surface of the large-diameter lower shaft part (C3-2), and the planetary gear (D1) is meshed with the inner gear ring (D2) to form a small-tooth-difference planetary gear pair; the upper end of the mandrel (D3) is in interference fit with the middle hole of the output disc (D4-2), the mandrel (D3) is in rotatable fit with the eccentric hole (C3a) of the eccentric shaft (C3), the lower end of the mandrel (D3) is in rotatable fit with the shell (A), and each pin (D1-1) of the planetary gear (D1) extends into the corresponding output disc hole (D4-2a) of the output disc (D4-2); the motor (B) can drive the eccentric shaft (C3) to rotate around the axis of the eccentric hole (C3 a);
wherein the radius of the output disc hole (D4-2a) is larger than that of the pin (D1-1), and the radius of the output disc hole (D4-2a) is equal to the sum of the radius of the pin (D1-1) and the center distance between the inner gear ring (D2) and the planetary gear (D1), and is equal to the sum of the radius of the pin (D1-1) and the eccentricity of the axis of the eccentric hole (C3a) relative to the axis of the eccentric shaft (C3).
6. The hug-axle type automobile shift-by-wire actuator according to claim 5, wherein: the motor (B) is a brush motor; the primary transmission assembly (C) further comprises a worm (C1) and a bevel gear (C2); two ends of the worm (C1) are rotatably matched with the shell (A), a motor shaft of the motor (B) is provided with a thread rolling structure, and the motor shaft of the motor (B) is inserted into a middle hole of the worm (C1) and is in interference fit with the middle hole; the eccentric shaft (C3) is fixedly arranged on the end face of the helical gear (C2), an eccentric hole (C3a) of the eccentric shaft (C3) is coaxially communicated with a middle hole of the helical gear (C2), and the lower end of the mandrel (D3) is rotatably matched with the shell (A) after sequentially passing through the eccentric hole (C3a) of the eccentric shaft (C3) and the middle hole of the helical gear (C2); the helical gear (C2) is meshed with the worm (C1).
7. The hug-axle type automobile shift-by-wire actuator according to claim 6, wherein: the shell (A) consists of an upper shell (A1), a middle shell (A2) and a lower shell (A3); the body of the motor (B) is placed on a motor supporting and positioning structure (A3a) of the lower shell (A3), two ends of the worm (C1) are respectively provided with a square shaft sleeve (C4), the two square shaft sleeves (C4) are placed on a worm supporting and positioning structure (A3B) of the lower shell (A3), the middle shell (A2) and the lower shell (A3) are fixedly connected through screws, the motor (B) and the primary transmission assembly (C) are covered in a mounting cavity formed by the middle shell (A2) and the lower shell (A3), and the body of the motor (B) and the two square shaft sleeves (C4) are fixed; and the inner gear ring positioning groove structure (A3c) on the lower shell (A3) extends to the upper part of the middle shell (A2).
8. The hug-axle type automobile shift-by-wire actuator according to claim 7, wherein: the inner gear ring (D2) is clamped and fixed on an inner gear ring positioning groove structure (A3c) of the lower shell (A3) through a clamping block (D2-1) on the outer edge of the inner gear ring (D2), and the lower end of the mandrel (D3) is rotatably matched with a mandrel positioning hole (A3D) on the lower shell (A3); the upper shell (A1) is provided with an output hole (A1a) and a shaft sleeve mounting groove (A1b), the output hole (A1a) and the shaft sleeve mounting groove (A1b) are respectively provided with a connecting shaft sleeve (E5) and a rotary support shaft sleeve (E6) which are in interference fit with the output hole and the shaft sleeve mounting groove, the annular circuit board (F1) is fixed in the upper case (A1) by screws, the upper shell (A1) and the lower shell (A3) are fixedly connected through screws, the small tooth difference planetary gear transmission assembly (D), the shaft-embracing output assembly (E), the sensing control assembly (F) and the middle shell (A2) are covered in a mounting cavity formed by the upper shell (A1) and the lower shell (A3), and such that a bushing engaging groove (E1d) of the rotary bracket (E1) located outside the position sensing installation groove (E1c) is rotatably engaged with the rotary bracket bushing (E6), the connecting shaft (E2) and the connecting shaft sleeve (E5) are in rotatable fit; a seal ring (A4) is provided between the upper case (A1) and the lower case (A3).
9. The hug-axle type automobile shift-by-wire actuator according to claim 7, wherein: the bottom of the lower shell (A3) is provided with a vent plug (A5).
10. The utility model provides an automobile gear shifting system, includes selector, shift controller, shift actuator and automatic transmission, its characterized in that: the gear shifting actuator is a shaft-clasping type automobile shift-by-wire actuator according to any one of claims 1 to 9, a shell (A) of the shaft-clasping type automobile shift-by-wire actuator is fixed with a box body of the automatic gearbox, and a TCU control shaft (G) of the automatic gearbox is embedded in a shaft-clasping hole (E2a) of the shaft-clasping type automobile shift-by-wire actuator; after a gear signal generated by a driver operating the gear shifter is converted into a control signal through the gear shifting controller, a signal power supply contact pin (F3) of the axle type automobile shift-by-wire actuator is input into an annular circuit board (F1), so that a connecting shaft (E2) of the axle type automobile shift-by-wire actuator can drive a TCU control shaft (G) of the automatic gearbox to rotate by a corresponding angle, and the automatic gearbox is controlled to be switched to a corresponding gear; and the annular circuit board (F1) feeds back the corresponding generated rotation position signal to the gear shifting controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010824124.7A CN112049925A (en) | 2020-08-17 | 2020-08-17 | Axle-hung type automobile drive-by-wire gear shifting actuator and automobile gear shifting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010824124.7A CN112049925A (en) | 2020-08-17 | 2020-08-17 | Axle-hung type automobile drive-by-wire gear shifting actuator and automobile gear shifting system |
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| Publication Number | Publication Date |
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| CN112049925A true CN112049925A (en) | 2020-12-08 |
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|---|---|---|---|
| CN202010824124.7A Pending CN112049925A (en) | 2020-08-17 | 2020-08-17 | Axle-hung type automobile drive-by-wire gear shifting actuator and automobile gear shifting system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112728072A (en) * | 2020-12-31 | 2021-04-30 | 安徽骏瑞新能源科技有限公司 | Swing arm type gear shifting driving mechanism for AMT (automated mechanical transmission) gearbox of electric vehicle |
| CN115217957A (en) * | 2021-06-21 | 2022-10-21 | 广州汽车集团股份有限公司 | Control method for realizing automatic gear engagement of synchronizer and transmission controller |
| WO2023071304A1 (en) * | 2021-10-25 | 2023-05-04 | 科博达(重庆)智控技术有限公司 | Structure for resolving water entering plug-in end in actuator |
-
2020
- 2020-08-17 CN CN202010824124.7A patent/CN112049925A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112728072A (en) * | 2020-12-31 | 2021-04-30 | 安徽骏瑞新能源科技有限公司 | Swing arm type gear shifting driving mechanism for AMT (automated mechanical transmission) gearbox of electric vehicle |
| CN112728072B (en) * | 2020-12-31 | 2023-03-14 | 安徽骏瑞新能源科技有限公司 | Swing arm type gear shifting driving mechanism for AMT (automated mechanical transmission) gearbox of electric vehicle |
| CN115217957A (en) * | 2021-06-21 | 2022-10-21 | 广州汽车集团股份有限公司 | Control method for realizing automatic gear engagement of synchronizer and transmission controller |
| CN115217957B (en) * | 2021-06-21 | 2023-11-14 | 广州汽车集团股份有限公司 | Control method for realizing automatic gear shifting of synchronizer and transmission controller |
| WO2023071304A1 (en) * | 2021-10-25 | 2023-05-04 | 科博达(重庆)智控技术有限公司 | Structure for resolving water entering plug-in end in actuator |
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