CN117515063A - Electromagnetic clutch for hybrid gearbox - Google Patents

Electromagnetic clutch for hybrid gearbox Download PDF

Info

Publication number
CN117515063A
CN117515063A CN202311369229.8A CN202311369229A CN117515063A CN 117515063 A CN117515063 A CN 117515063A CN 202311369229 A CN202311369229 A CN 202311369229A CN 117515063 A CN117515063 A CN 117515063A
Authority
CN
China
Prior art keywords
tooth
input shaft
tooth assembly
conical
driven gear
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202311369229.8A
Other languages
Chinese (zh)
Inventor
潘二栓
曹维
徐海林
武红钢
刘行
周坤
曹利盛
周旺
刘尧
陈立刚
潘发玉
邹大庆
石放辉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiefurui Changzhou New Energy Vehicle Technology Co ltd
Original Assignee
Jiefurui Changzhou New Energy Vehicle Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jiefurui Changzhou New Energy Vehicle Technology Co ltd filed Critical Jiefurui Changzhou New Energy Vehicle Technology Co ltd
Priority to CN202311369229.8A priority Critical patent/CN117515063A/en
Publication of CN117515063A publication Critical patent/CN117515063A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D27/00—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor
    • F16D27/02—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor with electromagnets incorporated in the clutch, i.e. with collecting rings
    • F16D27/04—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor with electromagnets incorporated in the clutch, i.e. with collecting rings with axially-movable friction surfaces
    • F16D27/06—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor with electromagnets incorporated in the clutch, i.e. with collecting rings with axially-movable friction surfaces with friction surfaces arranged within the flux
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D27/00—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor
    • F16D27/14—Details

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mechanical Operated Clutches (AREA)

Abstract

The invention discloses an electromagnetic clutch for a hybrid gearbox, which comprises an input shaft, a driven gear, a combination tooth assembly, an electromagnetic coil and an elastic piece, wherein the electromagnetic coil is arranged on the input shaft; the transmission part is arranged on the input shaft, the combined tooth assembly is sleeved on the transmission part in a sliding manner and is suitable for sliding on the transmission part along the axial direction of the input shaft, at least one conical key protruding outwards along the radial direction is arranged on the peripheral wall of the transmission part, two side walls of the conical key incline from right to left to the middle along the axial direction of the input shaft, conical grooves corresponding to the conical keys one to one are formed in the inner peripheral part of the combined tooth assembly, two side walls of the conical groove incline from right to left to the middle along the axial direction of the input shaft, and the conical keys are matched in the corresponding conical grooves. The invention can not be suddenly separated when the electromagnetic coil is powered off, so that the abrupt interruption of torque transmission can be avoided, and the driving safety can be ensured when the electromagnetic coil is applied to automobiles.

Description

Electromagnetic clutch for hybrid gearbox
Technical Field
The invention relates to an electromagnetic clutch for a hybrid gearbox.
Background
Currently, the torque output by an automobile engine needs to be transmitted outwards through a clutch, which typically includes a solenoid and a spring. When the electromagnetic coil is electrified, the clutch enters a combined state, and at the moment, the torque of the engine can be output outwards through the clutch; when the solenoid is de-energized, the spring brings the clutch into a disengaged state, also known as a disengaged state, in which torque transfer in the clutch is interrupted. However, in the conventional clutch, if the electromagnetic coil is suddenly disconnected due to an abrupt cause such as a fault, the spring drives the clutch to be rapidly released, so that the torque transmission in the clutch is suddenly interrupted, and further, the automobile is suddenly lost, which is very dangerous in the running process of the automobile, and a safety accident is easily caused.
For example, chinese patent publication No. CN210034218U discloses a tooth-embedded electromagnetic clutch, which includes a movable tooth sleeve, a fixed tooth sleeve, a spring, an electromagnetic coil, and other components, where the movable tooth sleeve and the fixed tooth sleeve are respectively provided with end teeth. When the electromagnetic coil is electrified, the movable tooth sleeve is meshed with the fixed tooth sleeve through the end face teeth, and torque can be transmitted at the moment; when the electromagnetic coil is suddenly disconnected, the elastic force of the spring enables the movable tooth sleeve to be rapidly separated from the fixed tooth sleeve, so that torque transmission in the tooth-embedded electromagnetic clutch is suddenly interrupted, and the tooth-embedded electromagnetic clutch is extremely unsafe.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides an electromagnetic clutch for a hybrid gearbox, which can not be suddenly separated when an electromagnetic coil is powered off, so that the abrupt interruption of torque transmission can be avoided, and the driving safety can be ensured when the electromagnetic clutch is applied to an automobile.
In order to solve the technical problems, the technical scheme of the invention is as follows: an electromagnetic clutch for a hybrid gearbox comprises an input shaft, a driven gear, a combination tooth assembly, an electromagnetic coil and an elastic piece; wherein,
the input shaft is provided with a transmission part;
the combined tooth component is sleeved on the transmission part in a sliding way and is suitable for sliding on the transmission part along the axial direction of the input shaft;
at least one conical key protruding outwards in the radial direction is arranged on the peripheral wall of the transmission part, and two side walls of the conical key incline from right to left to the middle along the axial direction of the input shaft;
the inner peripheral part of the combination tooth assembly is provided with conical grooves corresponding to the conical keys one by one, two side walls of the conical grooves incline from right to left to the middle along the axial direction of the input shaft, and the conical keys are matched in the corresponding conical grooves, so that when the input shaft is driven to rotate, one side wall of each conical key props against one side wall of each conical groove to drive the combination tooth assembly to rotate;
the driven gear is rotatably connected to the input shaft and positioned on the left side of the combination tooth assembly;
an end face tooth part is arranged on one end part of the driven gear, which faces the combined tooth assembly;
a matched tooth part matched with the end face tooth part is arranged on one end part of the combined tooth assembly, which faces the driven gear;
the electromagnetic coil is positioned on one side of the combination tooth assembly and is used for attracting the combination tooth assembly when power is supplied to the combination tooth assembly so as to drive the combination tooth assembly to move towards the driven gear to a combination position, so that the end face tooth part is buckled and connected with the matched tooth part;
the elastic piece is connected with the combining tooth assembly and used for driving the combining tooth assembly to deviate from the driven gear to a separation position through elastic force when the electromagnetic coil is powered off, so that the end face tooth part is separated from the matched tooth part.
Further, a retainer ring is connected to the input shaft, the elastic member is installed between the retainer ring and the coupling tooth assembly in a compressed mode, one end portion of the elastic member abuts against the retainer ring, and the other end portion of the elastic member abuts against the coupling tooth assembly.
Further, the retainer ring is located between the driven gear and the combination tooth assembly.
Further, the electromagnetic coil is fixedly arranged between the driven gear and the combination tooth assembly.
Further, the electromagnetic coil is of an annular structure and surrounds the outer sides of the end face tooth parts and the matched tooth parts.
Further, the taper keys are provided with at least two taper keys and are sequentially and uniformly distributed along the circumferential direction of the transmission part.
Further to prevent the tooth assembly from slipping off the drive portion, the tapered key is provided with a radially outwardly projecting stop for abutting an end face of the tooth assembly facing away from the driven gear to define the position of the tooth assembly when the tooth assembly is moved to the disengaged position.
Further, a generator driving gear which is used for being in transmission connection with the ISG generator is also connected to the input shaft.
The utility model provides a generator driving gear's concrete mounting means, be equipped with the spline portion on the input shaft, the generator driving gear cooperation is connected on the spline portion, the driven gear is located the generator driving gear with combine between the tooth subassembly.
Further provided is a specific construction of the bond tooth assembly, the bond tooth assembly including a bond tooth body and an armature;
the combined tooth body is sleeved on the transmission part in a sliding way and is suitable for sliding on the transmission part along the axial direction of the input shaft;
the armature is connected to the bonding tooth body and is arranged on the outer side of the bonding tooth body in a surrounding mode;
the electromagnetic coil is arranged opposite to the armature and is used for energizing and absorbing the armature so as to drive the combination tooth body to move towards the driven gear to the combination position;
the conical groove is arranged on the inner peripheral part of the combined tooth body;
the matching tooth part is arranged on one end part of the combining tooth body, which faces the driven gear.
After adopting above-mentioned technical scheme, when solenoid circular telegram, solenoid produces magnetic force and attracts the bonding tooth subassembly moves left, works as the bonding tooth subassembly moves left the bonding position time the terminal surface tooth portion with cooperation tooth portion lock is connected, and the electromagnetic clutch for the hybrid transmission of this embodiment of this moment is in the bonding state, can the transmission moment of torsion. When the electromagnetic coil is powered off, the magnetic force can disappear, at the moment, the elastic piece drives the combined tooth assembly to move rightwards, when the combined tooth assembly moves rightwards to the separation position, the end face tooth part is separated from the matched tooth part, at the moment, the electromagnetic clutch for the hybrid gearbox is in a separation state, and torque transmission is interrupted.
Wherein the end face tooth part is buckled with the matched tooth part when the end face tooth part is in a combined state, the input shaft is in transmission connection with the engine at the moment,the engine outputs torque to the input shaft to drive the input shaft to rotate, the input shaft drives the combined tooth assembly to rotate through the cooperation of the taper key and the taper groove, the combined tooth assembly drives the driven gear to rotate through the buckling of the end face tooth part and the cooperation tooth part, and the driven gear is used for being meshed with an external gear so as to transmit the torque to the external gear and further output power to the external gear. At this time, if the electromagnetic coil is suddenly de-energized due to an abrupt cause such as a failure, the electromagnetic coil immediately loses the magnetic attraction force to the bonding tooth assembly, and the elastic member applies a rightward elastic force F to the bonding tooth assembly 1 . In this case, for the electromagnetic clutch of the prior art, the coupling tooth assembly is subjected to the elastic force F of the elastic member 1 Driving the end face tooth part to move rightwards so as to separate the end face tooth part from the matched tooth part; the time from the abrupt power-off of the electromagnetic coil to the complete separation of the face teeth from the mating teeth is short, so that torque transmission in the electromagnetic clutch of the prior art is abruptly interrupted and very dangerous. In this embodiment, when the electromagnetic coil is suddenly de-energized, the engine still outputs torque to the input shaft and drives the input shaft to rotate, and the input shaft still drives the coupling tooth assembly to rotate, at this time, the side wall of the taper key on the input shaft abuts against the side wall of the taper groove in the coupling tooth assembly, and the side wall of the taper key applies a thrust force F perpendicular to the contact surface to the side wall of the taper groove, as shown in fig. 10. Because both side walls of the taper key and both side walls of the taper groove are inclined from right to left to the middle, the thrust force F can be decomposed into an axial component force Fr and a tangential component force Ft, the axial component force Fr acts on the side walls of the taper groove and is directed leftwards, and the combined action of the axial component force Fr and the friction force between the taper key and the taper groove can counteract the rightward elastic force F exerted on the combined tooth assembly by the elastic piece 1 Thereby preventing the bonding tooth assembly from moving to the right. Therefore, when the electromagnetic coil is suddenly de-energized, the combined tooth assembly does not move rightwards, so that the end face tooth part and the matched tooth part can still keep the buckling connection withoutThe electromagnetic clutch for the hybrid gearbox can be suddenly disconnected and separated, so that torque transmission cannot be suddenly interrupted, and the electromagnetic clutch for the hybrid gearbox cannot suddenly enter a disconnected state when the electromagnetic coil is suddenly disconnected, so that the sudden interruption of torque transmission is avoided, and the electromagnetic clutch is safer. More specifically, when the sensor senses that the electromagnetic coil is powered off, the engine reduces the throttle to gradually reduce the output torque of the engine, and when the output torque of the engine is reduced to be low enough, the thrust force F is gradually reduced until the elastic force F of the elastic piece cannot be counteracted 1 At this time, the engaging tooth assembly is moved rightward, and the end face tooth portion and the mating tooth portion are disengaged. Therefore, the electromagnetic clutch for the hybrid gearbox of the embodiment of the application can not be suddenly separated when the electromagnetic coil is suddenly powered off, but can slowly enter a separated state, so that sudden interruption of torque transmission is avoided, the torque transmission is gradually reduced, driving safety can be ensured when the electromagnetic clutch is applied to an automobile, sudden torque loss of the automobile is avoided, and the electromagnetic clutch is safer.
Further, the elastic force F of the elastic member in the coupled state 1 Needs to satisfy F 1 ≤F r +F 2 The method comprises the steps of carrying out a first treatment on the surface of the Wherein F is r +F 2 ＝(T/D p )·tanα+(T/(D p Cos α)). V; from the above two formulas, it can be deduced that: t is greater than or equal to F 1 ·D p /(tanα+ (v/cos α)); wherein F is 2 Is the friction force generated between the conical key and the conical groove, v is the friction coefficient between the conical key and the conical groove, D p The pitch diameter of the taper key is T is torque output by the engine to the input shaft, alpha is the inclination angle of the side wall of the taper key, and the inclination angle of the side wall of the taper groove is the same as the inclination angle of the side wall of the taper key. Let critical torque T 0 ＝F 1 ·D p /(tan. Alpha+ (v/cos. Alpha.)), therefore, when T.gtoreq.T 0 When the electromagnetic coil is suddenly disconnected, the end face tooth part and the matched tooth part can be kept in buckling connection without being suddenly disconnected. When the sensor senses that the electromagnetic coil is powered off, the engine reduces the throttle, and when the output torque of the engine is gradually reduced until T is smaller than T 0 The end face teeth are matched with theThe matching tooth parts are separated, and at the moment, the electromagnetic clutch for the hybrid gearbox can enter the separation state from the combination state, and the torque is gradually reduced without sudden interruption in the whole process, so that the driving safety is ensured.
Drawings
FIG. 1 is a schematic diagram of the structure of an electromagnetic clutch for a hybrid transmission according to the present invention;
FIG. 2 is an exploded view of the assembly of the electromagnetic clutch for a hybrid transmission of the present invention;
FIG. 3 is a front cross-sectional view of the electromagnetic clutch for the hybrid transmission of the present invention;
FIG. 4 is a diagram of the mating relationship of the driven gear and the bond tooth assembly of the present invention;
FIG. 5 is a schematic diagram of an input shaft according to the present invention;
FIG. 6 is a schematic diagram of the passive gear of the present invention mounted on an input shaft;
FIG. 7 is a schematic view of the structure of the coupling tooth assembly of the present invention mounted on an input shaft;
FIG. 8 is a schematic view of the structure of a bond tooth assembly of the present invention;
FIG. 9 is a schematic view of the configuration of the engagement of the tapered key and tapered slot of the present invention;
FIG. 10 is a force diagram of the invention between a tapered key and a tapered slot;
fig. 11 is a cross-sectional view of the transmission part of the present invention.
Detailed Description
In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
As shown in fig. 1 to 11, an electromagnetic clutch for a hybrid transmission includes an input shaft 1, a driven gear 2, a coupling tooth assembly 3, an electromagnetic coil 4, and an elastic member 5; wherein,
the input shaft 1 is provided with a transmission part 6;
the combined tooth assembly 3 is sleeved on the transmission part 6 in a sliding way and is suitable for sliding on the transmission part 6 along the axial direction of the input shaft 1;
at least one conical key 7 protruding outwards in the radial direction is arranged on the peripheral wall of the transmission part 6, and two side walls of the conical key 7 incline from right to left to the middle along the axial direction of the input shaft 1;
the inner peripheral part of the combination tooth assembly 3 is provided with conical grooves 8 which are in one-to-one correspondence with the conical keys 7, two side walls of the conical grooves 8 incline from right to left to the middle along the axial direction of the input shaft 1, and the conical keys 7 are matched in the corresponding conical grooves 8, so that one side wall of each conical key 7 props against one side wall of each conical groove 8 when the input shaft 1 is driven to rotate, and the combination tooth assembly 3 is driven to rotate;
the driven gear 2 is rotatably connected to the input shaft 1 and is positioned on the left side of the combination gear assembly 3;
an end face tooth part 9 is arranged on one end part of the driven gear 2 facing the combined tooth assembly 3;
a mating tooth part 10 which is matched with the end face tooth part 9 is arranged on one end part of the combined tooth assembly 3 facing the driven gear 2;
the electromagnetic coil 4 is positioned at one side of the combination tooth assembly 3, and the electromagnetic coil 4 is used for attracting the combination tooth assembly 3 when being electrified so as to drive the combination tooth assembly 3 to move towards the driven gear 2 to a combination position, so that the end face tooth part 9 is in buckling connection with the matched tooth part 10;
the elastic piece 5 is connected with the combination tooth assembly 3 and is used for driving the combination tooth assembly 3 to move away from the driven gear 2 to a separation position through elastic force when the electromagnetic coil 4 is powered off so as to separate the end face tooth part 9 from the matched tooth part 10. Specifically, when the electromagnetic coil 4 is electrified, the electromagnetic coil 4 generates magnetic force and attracts the combination tooth assembly 3 to move leftwards, and when the combination tooth assembly 3 moves leftwards to the combination position, the end face tooth part 9 is buckled and connected with the matching tooth part 10, and at this time, the electromagnetic clutch for the hybrid gearbox in the embodiment of the application is in a combination state and can transmit torque. When the electromagnetic coil 4 is powered off, the magnetic force can disappear, at the moment, the elastic piece 5 drives the combined tooth assembly 3 to move rightwards, when the combined tooth assembly 3 moves rightwards to the separation position, the end face tooth part 9 is separated from the matched tooth part 10, at the moment, the electromagnetic clutch for the hybrid gearbox is in a separation state, and torque transmission is interrupted.
Further specifically, when in the combined state, the end face tooth part 9 is buckled and connected with the matching tooth part 10, at this time, the input shaft 1 is in transmission connection with the engine, the engine outputs torque to the input shaft 1 so as to drive the input shaft 1 to rotate, the input shaft 1 drives the combining tooth assembly 3 to rotate through the matching of the taper key 7 and the taper groove 8, the combining tooth assembly 3 drives the driven gear 2 to rotate through the buckling of the end face tooth part 9 and the matching tooth part 10, and the driven gear 2 is used for being meshed with an external gear so as to transmit the torque to the external gear so as to output power to the external gear. At this time, if the electromagnetic coil 4 is suddenly de-energized due to an abrupt cause such as a failure, the electromagnetic coil 4 immediately loses the magnetic attraction force to the bonding tooth assembly 3, and the elastic member 5 applies a rightward elastic force F to the bonding tooth assembly 3 1 . In this case, for the electromagnetic clutch of the prior art, the coupling tooth assembly 3 is subjected to the elastic force F of the elastic member 5 1 Driving to move rightward, so as to separate the end face tooth portion 9 from the mating tooth portion 10; the time from the abrupt power-off of the electromagnetic coil 4 to the complete separation of the face teeth 9 from the mating teeth 10 is short, so that the torque transmission in the electromagnetic clutch of the prior art is abruptly interrupted and very dangerous.
In this embodiment, when the electromagnetic coil 4 is suddenly de-energized, the engine still outputs torque to the input shaft 1 and drives the input shaft 1 to rotate, and the input shaft 1 still drives the coupling tooth assembly 3 to rotate, at this time, the side wall of the taper key 7 on the input shaft 1 abuts against the side wall of the taper groove 8 in the coupling tooth assembly 3, and the side wall of the taper key 7 applies a thrust force F perpendicular to the contact surface to the side wall of the taper groove 8, as shown in fig. 10. Also, because both side walls of the taper key 7 and both side walls of the taper groove 8 are inclined from right to left to the middle, the thrust force F can be decomposed into an axial directionThe force component Fr and a tangential force component Ft, the axial force component Fr acting on the side wall of the conical groove 8 and directed to the left, the combined action of the axial force component Fr and the friction between the conical key 7 and the conical groove 8 counteracts the rightward spring force F exerted by the spring element 5 on the coupling tooth assembly 3 1 Thereby preventing the bonding tooth assembly 3 from moving rightward. Therefore, when the electromagnetic coil 4 is suddenly powered off, the coupling tooth assembly 3 cannot move rightward, so that the end face tooth portion 9 and the matching tooth portion 10 can still keep buckled connection and cannot be suddenly disconnected and separated, and therefore torque transmission cannot be suddenly interrupted, and therefore the electromagnetic clutch for the hybrid gearbox in the embodiment of the application cannot suddenly enter a disconnected state when the electromagnetic coil 4 is suddenly powered off, so that sudden interruption of torque transmission is avoided, and the electromagnetic clutch is safer. More specifically, when the sensor senses that the electromagnetic coil 4 is powered off, the engine reduces the throttle to gradually reduce the output torque of the engine, and when the output torque of the engine is reduced to be low enough, the thrust force F is gradually reduced until the elastic force F of the elastic member 5 cannot be counteracted 1 At this time, the coupling tooth assembly 3 is moved rightward, and the face tooth 9 and the mating tooth 10 are separated. Therefore, the electromagnetic clutch for the hybrid gearbox of the embodiment of the application can not be suddenly separated when the electromagnetic coil 4 is suddenly powered off, but can slowly enter a separated state, so that sudden interruption of torque transmission is avoided, the torque transmission is gradually reduced, driving safety can be ensured when the electromagnetic clutch is applied to an automobile, sudden torque loss of the automobile is avoided, and the electromagnetic clutch is safer.
Further specifically, the elastic force F of the elastic member 5 in the bonded state 1 Needs to satisfy F 1 ≤F r +F 2 ；
Wherein F is r +F 2 ＝(T/D p )·tanα+(T/(D p ·cosα))·υ；
From the above two formulas, it can be deduced that:
T≥F 1 ·D p /(tanα+ (v/cos α)); wherein F is 2 For the friction force generated between the conical key 7 and the conical groove 8, v is the coefficient of friction between the conical key 7 and the conical groove 8,D p the pitch diameter of the taper key 7, T is the torque output from the engine to the input shaft 1, α is the inclination angle of the side wall of the taper key 7, and the inclination angle of the side wall of the taper groove 8 is the same as the inclination angle of the side wall of the taper key 7. Let critical torque T 0 ＝F 1 ·D p /(tan. Alpha+ (v/cos. Alpha.)), therefore, when T.gtoreq.T 0 When the electromagnetic coil 4 is suddenly disconnected, the end face tooth part 9 and the matched tooth part 10 can be kept in a buckling connection without being suddenly disconnected. When the sensor senses that the electromagnetic coil 4 is powered off, the engine reduces the throttle, and when the output torque of the engine is gradually reduced until T is smaller than T 0 When the electromagnetic clutch for the hybrid gearbox is in the embodiment of the application, the electromagnetic clutch for the hybrid gearbox can be in the disengaging state from the engaging state, and torque is gradually reduced without sudden interruption in the whole process, so that driving safety is guaranteed.
In this embodiment, the driven gear 2 may be rotatably connected to the input shaft 1 through a needle bearing, the input shaft 1 is rotatably disposed in a hybrid transmission, and the electromagnetic coil 4 is fixedly disposed in the hybrid transmission.
As shown in fig. 2, 3 and 9, a retainer ring 11 may be connected to the input shaft 1, the elastic member 5 is mounted between the retainer ring 11 and the coupling tooth assembly 3 in a compressed manner, one end portion of the elastic member 5 abuts against the retainer ring 11, and the other end portion of the elastic member 5 abuts against the coupling tooth assembly 3; in particular, the retainer ring 11 is located on the left side of the bond tooth assembly 3.
As shown in fig. 2, 3 and 9, the retainer ring 11 is located between the driven gear 2 and the coupling tooth assembly 3; in this embodiment, the elastic member 5 may be a spring, and the retainer ring 11 is fixedly connected to the input shaft 1.
As shown in fig. 1 to 3, the electromagnetic coil 4 may be fixedly disposed between the driven gear 2 and the coupling tooth assembly 3.
As shown in fig. 1 to 3, the electromagnetic coil 4 has a ring structure and surrounds the outer sides of the end face teeth 9 and the mating teeth 10; the specific structure of the electromagnetic coil 4 is a prior art well known to those skilled in the art, and detailed description thereof is omitted in this embodiment.
As shown in fig. 5 to 7, the taper key 7 is provided with at least two taper keys and is uniformly distributed in sequence along the circumferential direction of the transmission part 6; in this embodiment, the number of taper keys 7 is 6.
As shown in fig. 1, 2, 3, 5, 6, 9, the tapered key 7 may be provided with a blocking portion 12 protruding radially outwards, and the blocking portion 12 is configured to abut against an end surface of the coupling tooth assembly 3 facing away from the driven gear 2 to define a position of the coupling tooth assembly 3 when the coupling tooth assembly 3 is moved to the separated position, so as to prevent the coupling tooth assembly 3 from slipping off the transmission portion 6.
As shown in fig. 1 to 3, the input shaft 1 may also be connected with a generator driving gear 13 for driving connection with an ISG generator; in this embodiment, the driven gear 2 is further used for driving connection with a TM drive motor; wherein, the TM driving motor and the ISG generator are both of the prior art.
As shown in fig. 2, 3, 5, 7 and 9, a spline portion 14 may be provided on the input shaft 1, the generator driving gear 13 is cooperatively connected to the spline portion 14, and the driven gear 2 is located between the generator driving gear 13 and the coupling tooth assembly 3.
As shown in fig. 1, 2, 3, 4, 7, 8, 9, the bond tooth assembly 3 may include a bond tooth body 15 and an armature 16;
the combined tooth body 15 is in sliding sleeve connection with the transmission part 6 and is suitable for sliding on the transmission part 6 along the axial direction of the input shaft 1;
the armature 16 is connected to the bonding tooth body 15 and is arranged around the outer side of the bonding tooth body 15;
the electromagnetic coil 4 is arranged opposite to the armature 16 and is used for electrically absorbing the armature 16 so as to drive the combined tooth body 15 to move towards the driven gear 2 to the combined position;
the conical groove 8 is arranged on the inner peripheral part of the combined tooth body 15;
the mating tooth part 10 is arranged on one end part of the combined tooth body 15, which faces the driven gear 2.
In this embodiment, the elastic member 5 is mounted in compression between the retainer ring 11 and the tooth body 15, and the elastic member 5 abuts against the tooth body 15; the blocking portion 12 is configured to abut against an end surface of the coupling tooth body 15 facing away from the driven gear 2 to define a position of the coupling tooth body 15. Specifically, the end face tooth portion 9 and the mating tooth portion 10 respectively include a plurality of teeth that are sequentially spaced apart along the circumferential direction, and the cross section of the teeth is a rectangular structure.
When the electromagnetic clutch for the hybrid gearbox of the embodiment of the application is in a combined state, the end face tooth part 9 is buckled and connected with the matched tooth part 10, the engine drives the input shaft 1 to rotate at the moment, the input shaft 1 drives the combined tooth assembly 3 to rotate through the matching of the conical key 7 and the conical groove 8, the combined tooth assembly 3 drives the driven gear 2 to rotate through the buckling of the end face tooth part 9 and the matched tooth part 10, and the driven gear 2 drives the external gear to rotate and transmits torque to the external gear so as to output power to the external gear. When the electromagnetic clutch for the hybrid transmission of the embodiment of the application is in a disengaged state, the end face tooth part 9 is disengaged from the mating tooth part 10, and the engine drives the input shaft 1, the coupling tooth assembly 3, the elastic member 5 and the retainer ring 11 to idle. The electromagnetic clutch for the hybrid gearbox is compact in structure, small in space size, light in weight, high in transmission efficiency, low in cost and simple in control logic.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.
In summary, when the electromagnetic coil 4 is energized, the electromagnetic coil 4 generates magnetic force and attracts the coupling tooth assembly 3 to move leftwards, and when the coupling tooth assembly 3 moves leftwards to the coupling position, the end face tooth portion 9 is buckled with the mating tooth portion 10, and at this time, the electromagnetic clutch for the hybrid gearbox according to the embodiment of the present application is in a coupling state, and can transmit torque. When the electromagnetic coil 4 is powered off, the magnetic force can disappear, at the moment, the elastic piece 5 drives the combined tooth assembly 3 to move rightwards, when the combined tooth assembly 3 moves rightwards to the separation position, the end face tooth part 9 is separated from the matched tooth part 10, at the moment, the electromagnetic clutch for the hybrid gearbox is in a separation state, and torque transmission is interrupted.
The end face tooth part 9 is buckled and connected with the matching tooth part 10 when the gear is in a combined state, at the moment, the input shaft 1 is in transmission connection with an engine, the engine outputs torque to the input shaft 1 to drive the input shaft 1 to rotate, the input shaft 1 drives the combining tooth assembly 3 to rotate through the matching of the taper key 7 and the taper groove 8, the combining tooth assembly 3 drives the driven gear 2 to rotate through the buckling of the end face tooth part 9 and the matching tooth part 10, and the driven gear 2 is used for being meshed with an external gear so as to transmit the torque to the external gear to further output power to the external gear. At this time, if the electromagnetic coil 4 is suddenly de-energized due to an abrupt cause such as a failure, the electromagnetic coil 4 immediately loses the magnetic attraction force to the bonding tooth assembly 3, and the elastic member 5 applies a rightward elastic force F to the bonding tooth assembly 3 1 . In this case, for the electromagnetic clutch of the prior art, the coupling tooth assembly 3 is subjected to the elastic force F of the elastic member 5 1 Driving to move rightward, so as to separate the end face tooth portion 9 from the mating tooth portion 10; the time from the abrupt power-off of the electromagnetic coil 4 to the complete separation of the face teeth 9 from the mating teeth 10 is short, so that the torque transmission in the electromagnetic clutch of the prior art is abruptly interrupted and very dangerous. In the present embodiment, the motor is still in the process of sudden power-off of the electromagnetic coil 4Torque is output to the input shaft 1 and drives the input shaft 1 to rotate, the input shaft 1 still drives the coupling tooth assembly 3 to rotate, at this time, the side wall of the taper key 7 on the input shaft 1 abuts against the side wall of the taper groove 8 in the coupling tooth assembly 3, and the side wall of the taper key 7 applies a thrust force F perpendicular to the contact surface to the side wall of the taper groove 8, as shown in fig. 10. Also, because both side walls of the taper key 7 and both side walls of the taper groove 8 are inclined from right to left to the middle, the thrust force F can be decomposed into an axial force component Fr and a tangential force component Ft, the axial force component Fr acts on the side wall of the taper groove 8 and is directed leftwards, and the frictional force between the axial force component Fr and the taper key 7 and the taper groove 8 can counteract the rightward elastic force F exerted on the coupling tooth assembly 3 by the elastic member 5 1 Thereby preventing the bonding tooth assembly 3 from moving rightward. Therefore, when the electromagnetic coil 4 is suddenly powered off, the coupling tooth assembly 3 cannot move rightward, so that the end face tooth portion 9 and the matching tooth portion 10 can still keep buckled connection and cannot be suddenly disconnected and separated, and therefore torque transmission cannot be suddenly interrupted, and therefore the electromagnetic clutch for the hybrid gearbox in the embodiment of the application cannot suddenly enter a disconnected state when the electromagnetic coil 4 is suddenly powered off, so that sudden interruption of torque transmission is avoided, and the electromagnetic clutch is safer. More specifically, when the sensor senses that the electromagnetic coil 4 is powered off, the engine reduces the throttle to gradually reduce the output torque of the engine, and when the output torque of the engine is reduced to be low enough, the thrust force F is gradually reduced until the elastic force F of the elastic member 5 cannot be counteracted 1 At this time, the coupling tooth assembly 3 is moved rightward, and the face tooth 9 and the mating tooth 10 are separated. Therefore, the electromagnetic clutch for the hybrid gearbox of the embodiment of the application can not be suddenly separated when the electromagnetic coil 4 is suddenly powered off, but can slowly enter a separated state, so that sudden interruption of torque transmission is avoided, the torque transmission is gradually reduced, driving safety can be ensured when the electromagnetic clutch is applied to an automobile, sudden torque loss of the automobile is avoided, and the electromagnetic clutch is safer.
Further, the elastic force F of the elastic member 5 in the coupled state 1 Needs to satisfy F 1 ≤F r +F 2 The method comprises the steps of carrying out a first treatment on the surface of the Wherein F is r +F 2 ＝(T/D p )·tanα+(T/(D p Cos α)). V; from the above two formulas, it can be deduced that: t is greater than or equal to F 1 ·D p /(tanα+ (v/cos α)); wherein F is 2 For the friction force generated between the conical key 7 and the conical groove 8, v is the friction coefficient between the conical key 7 and the conical groove 8, D p The pitch diameter of the taper key 7, T is the torque output from the engine to the input shaft 1, α is the inclination angle of the side wall of the taper key 7, and the inclination angle of the side wall of the taper groove 8 is the same as the inclination angle of the side wall of the taper key 7. Let critical torque T 0 ＝F 1 ·D p /(tan. Alpha+ (v/cos. Alpha.)), therefore, when T.gtoreq.T 0 When the electromagnetic coil 4 is suddenly disconnected, the end face tooth part 9 and the matched tooth part 10 can be kept in a buckling connection without being suddenly disconnected. When the sensor senses that the electromagnetic coil 4 is powered off, the engine reduces the throttle, and when the output torque of the engine is gradually reduced until T is smaller than T 0 When the electromagnetic clutch for the hybrid gearbox is in the embodiment of the application, the electromagnetic clutch for the hybrid gearbox can be in the disengaging state from the engaging state, and torque is gradually reduced without sudden interruption in the whole process, so that driving safety is guaranteed.
The technical problems, technical solutions and advantageous effects solved by the present invention have been further described in detail in the above-described embodiments, and it should be understood that the above-described embodiments are only illustrative of the present invention and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the scope of protection of the present invention.

Claims (10)

1. An electromagnetic clutch for a hybrid gearbox is characterized by comprising an input shaft (1), a driven gear (2), a combination gear assembly (3), an electromagnetic coil (4) and an elastic piece (5); wherein,
the input shaft (1) is provided with a transmission part (6);
the combined tooth assembly (3) is sleeved on the transmission part (6) in a sliding way and is suitable for sliding on the transmission part (6) along the axial direction of the input shaft (1);
at least one conical key (7) protruding outwards in the radial direction is arranged on the peripheral wall of the transmission part (6), and two side walls of the conical key (7) incline from right to left to the middle along the axial direction of the input shaft (1);
the inner periphery of the combination tooth assembly (3) is provided with conical grooves (8) which are in one-to-one correspondence with the conical keys (7), two side walls of the conical grooves (8) incline from right to left to the middle along the axial direction of the input shaft (1), and the conical keys (7) are matched in the corresponding conical grooves (8) so that when the input shaft (1) is driven to rotate, one side wall of each conical key (7) props against one side wall of each conical groove (8) to drive the combination tooth assembly (3) to rotate;
the driven gear (2) is rotatably connected to the input shaft (1) and positioned on the left side of the combined tooth assembly (3);
an end face tooth part (9) is arranged on one end part of the driven gear (2) facing the combined tooth assembly (3);
a matched tooth part (10) matched with the end face tooth part (9) is arranged on one end part of the combined tooth assembly (3) facing the driven gear (2);
the electromagnetic coil (4) is positioned on one side of the combination tooth assembly (3), and the electromagnetic coil (4) is used for attracting the combination tooth assembly (3) when being electrified so as to drive the combination tooth assembly (3) to move towards the driven gear (2) to a combination position, so that the end face tooth part (9) is in buckling connection with the matched tooth part (10);
the elastic piece (5) is connected with the combination tooth assembly (3) and is used for driving the combination tooth assembly (3) to deviate from the driven gear (2) to a separation position through elastic force when the electromagnetic coil (4) is powered off, so that the end face tooth part (9) is separated from the matched tooth part (10).
2. The electromagnetic clutch for a hybrid transmission according to claim 1, wherein a retainer ring (11) is connected to the input shaft (1), the elastic member (5) is compressively mounted between the retainer ring (11) and the coupling tooth assembly (3), one end portion of the elastic member (5) abuts against the retainer ring (11), and the other end portion of the elastic member (5) abuts against the coupling tooth assembly (3).
3. Electromagnetic clutch for a hybrid gearbox according to claim 2, characterized in that the retainer ring (11) is located between the driven gear (2) and the coupling tooth assembly (3).
4. Electromagnetic clutch for a hybrid transmission according to claim 1, characterized in that the electromagnetic coil (4) is fixedly arranged between the driven gear (2) and the coupling tooth assembly (3).
5. The electromagnetic clutch for a hybrid transmission according to claim 4, characterized in that the electromagnetic coil (4) has an annular structure and surrounds the outer sides of the end face tooth portion (9) and the mating tooth portion (10).
6. Electromagnetic clutch for a hybrid transmission according to claim 1, characterized in that said conical keys (7) are provided with at least two and are distributed uniformly in succession along the circumference of said transmission portion (6).
7. Electromagnetic clutch for a hybrid gearbox according to claim 1, characterized in that the conical key (7) is provided with a blocking portion (12) protruding radially outwards, the blocking portion (12) being adapted to abut against an end face of the coupling tooth assembly (3) facing away from the driven gear (2) to define the position of the coupling tooth assembly (3) when the coupling tooth assembly (3) is moved to the disengaged position.
8. Electromagnetic clutch for a hybrid transmission according to claim 1, characterized in that the input shaft (1) is also connected with a generator driving gear (13) for driving connection with an ISG generator.
9. The electromagnetic clutch for a hybrid transmission according to claim 8, characterized in that a spline portion (14) is provided on the input shaft (1), the generator driving gear (13) is cooperatively connected to the spline portion (14), and the driven gear (2) is located between the generator driving gear (13) and the coupling tooth assembly (3).
10. Electromagnetic clutch for a hybrid gearbox according to claim 1, characterised in that said coupling tooth assembly (3) comprises a coupling tooth body (15) and an armature (16);
the combination tooth body (15) is sleeved on the transmission part (6) in a sliding way and is suitable for sliding on the transmission part (6) along the axial direction of the input shaft (1);
the armature (16) is connected to the bonding tooth body (15) and is arranged around the outer side of the bonding tooth body (15);
the electromagnetic coil (4) is arranged opposite to the armature (16) and is used for energizing and absorbing the armature (16) so as to drive the combination tooth body (15) to move towards the driven gear (2) to the combination position;
the conical groove (8) is arranged on the inner peripheral part of the combined tooth body (15);
the matching tooth part (10) is arranged on one end part of the combining tooth body (15) facing the driven gear (2).
CN202311369229.8A 2023-10-20 2023-10-20 Electromagnetic clutch for hybrid gearbox Pending CN117515063A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311369229.8A CN117515063A (en) 2023-10-20 2023-10-20 Electromagnetic clutch for hybrid gearbox

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311369229.8A CN117515063A (en) 2023-10-20 2023-10-20 Electromagnetic clutch for hybrid gearbox

Publications (1)

Publication Number Publication Date
CN117515063A true CN117515063A (en) 2024-02-06

Family

ID=89752155

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311369229.8A Pending CN117515063A (en) 2023-10-20 2023-10-20 Electromagnetic clutch for hybrid gearbox

Country Status (1)

Country Link
CN (1) CN117515063A (en)

Similar Documents

Publication Publication Date Title
US10308113B2 (en) Differential gear
EP1293373B1 (en) Motor power train and method of assembling the same
US6834750B2 (en) Integrated starter-generator roller clutch
JP3658712B2 (en) Ball ramp mechanism and drive system clutch using the same
JP3658711B2 (en) Ball ramp mechanism and drive system clutch provided with the same
JP5030491B2 (en) Differential equipment
US20070197338A1 (en) Differential device
CA1188235A (en) Fail safe electromagnetic clutch
US20180345785A1 (en) Driveline rapid disconnect apparatus
US8899396B2 (en) Clutch device
US6935476B2 (en) Clutch having a multiple pole electromagnetic actuator for transfer cases and the like
CN117515063A (en) Electromagnetic clutch for hybrid gearbox
US6585094B2 (en) Power transmission apparatus
EP3926197B1 (en) Power transmitting clutch and disconnect
US11236811B1 (en) Center differential and drive system for four wheel drive
US5138211A (en) Spherical cam clutch for servoactuator
JP7270555B2 (en) Self-exciting electromagnetic desorption actuator
EP0105789A1 (en) Power steering pump failsafe clutch
US11519468B2 (en) Rotating e-clutch assembly providing four operating modes
JP2992304B2 (en) Coupling device
KR102561412B1 (en) Torque vectoring apparatus
US20240198794A1 (en) Disconnecting differential side gear mechanism
JPS6121302Y2 (en)
JP2018141530A (en) Engagement device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication