CN113669428A - Electric differential lock - Google Patents
Electric differential lock Download PDFInfo
- Publication number
- CN113669428A CN113669428A CN202110820426.1A CN202110820426A CN113669428A CN 113669428 A CN113669428 A CN 113669428A CN 202110820426 A CN202110820426 A CN 202110820426A CN 113669428 A CN113669428 A CN 113669428A
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- CN
- China
- Prior art keywords
- speed reducer
- bevel wheel
- driven bevel
- differential lock
- fork
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- 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.)
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Classifications
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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
- F16H48/00—Differential gearings
- F16H48/20—Arrangements for suppressing or influencing the differential action, e.g. locking devices
- F16H48/28—Arrangements for suppressing or influencing the differential action, e.g. locking devices using self-locking gears or self-braking gears
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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
- F16H48/00—Differential gearings
- F16H48/20—Arrangements for suppressing or influencing the differential action, e.g. locking devices
- F16H48/30—Arrangements for suppressing or influencing the differential action, e.g. locking devices using externally-actuatable means
- F16H48/34—Arrangements for suppressing or influencing the differential action, e.g. locking devices using externally-actuatable means using electromagnetic or electric actuators
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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
- F16H48/00—Differential gearings
- F16H48/38—Constructional details
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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
- F16H48/00—Differential gearings
- F16H48/20—Arrangements for suppressing or influencing the differential action, e.g. locking devices
- F16H48/28—Arrangements for suppressing or influencing the differential action, e.g. locking devices using self-locking gears or self-braking gears
- F16H2048/282—Arrangements for suppressing or influencing the differential action, e.g. locking devices using self-locking gears or self-braking gears using the axial movement of axially movable bevel gears
Abstract
The application relates to an electric differential lock for a locking speed reducer, which comprises a motor, a locking assembly and a transmission assembly. The locking assembly is configured to be capable of cooperating with the speed reducer to lock the speed reducer, and the transmission assembly is connected with the motor and the locking assembly. Wherein the motor is configured to drive the locking assembly to close the speed reducer to engage with the speed reducer or to drive the assembly to far away from the speed reducer to disengage from the speed reducer through the transmission assembly. When the motor drive transmission assembly works, the transmission assembly drives the locking assembly to act so as to be close to or far away from the speed reducer, locking or releasing of the speed reducer is realized, piston cylinder parts are not adopted in the locking and releasing processes of the whole speed reducer, and the problems that in the prior art, a piston cylinder is easy to rust, gas leakage faults are easy to occur, and the locking stroke needs to be controlled by barriers to cause the incapability of realizing accurate control and the like are solved.
Description
Technical Field
The application relates to the technical field of automobile axles, in particular to an electric differential lock.
Background
Along with the development of automobile axle technique, the differential lock technique of automobile axle has appeared, and among the prior art, the differential lock adopts atmospheric pressure as the power supply of differential lock, and this kind of power supply needs adopt the piston cylinder structure, and faults such as piston cylinder corrosion, gas leakage appear easily in the piston cylinder structure to and the locking stroke needs the obstacle to control and leads to unable realization accurate control scheduling problem.
Disclosure of Invention
Based on this, it is necessary to provide an electronic differential lock to the problem that the cylinder corrosion, gas leakage trouble and locking stroke need the obstacle to control and lead to unable realization accurate control etc. appear easily to current car axle differential lock piston cylinder structure that uses the piston cylinder as the power supply.
An electric differential lock for locking a speed reducer, the electric differential lock comprising:
a motor;
a locking assembly configured to be engageable with the retarder to lock the same; and
the transmission assembly is connected with the motor and the locking assembly;
wherein the motor is configured to drive the locking assembly closer to the speed reducer to engage with the speed reducer or away from the speed reducer to disengage with the speed reducer via the transmission assembly.
In one embodiment, the transmission assembly comprises a driving bevel wheel and a driven bevel wheel, a gear shaft of the driving bevel wheel is connected to an output shaft of the motor, and the driven bevel wheel is meshed with the driving bevel wheel; the driven cone pulley is connected with the locking assembly, and the driven cone pulley can drive the locking assembly to be close to or far away from the speed reducer.
In one embodiment, the locking assembly comprises a shifting fork and a sliding gear sleeve, one end of the shifting fork is connected to the driven bevel wheel, the other end of the shifting fork is clamped to the sliding gear sleeve, the shifting fork is configured to move axially along a gear shaft of the driven bevel wheel so as to shift the sliding gear sleeve to be close to or far away from the speed reducer, and the sliding gear sleeve is configured to be matched with the speed reducer so as to lock the speed reducer.
In one embodiment, the gear shaft of the driven bevel wheel is provided with external threads, the shifting fork is provided with a mounting end, the mounting end is provided with a mounting hole, internal threads are arranged in the mounting hole, and the shifting fork is in threaded connection with the gear shaft of the driven bevel wheel, so that the shifting fork can be driven to move axially along the gear shaft of the driven bevel wheel when the driven bevel wheel rotates.
In one embodiment, the shifting fork is further provided with a fork head, a first annular groove is formed in the sliding gear sleeve, the fork head is assembled on the sliding gear sleeve, and two end faces of the fork head are attached to two end faces of the first annular groove.
In one embodiment, the reducer is provided with a plurality of mounting positions for mounting the driven bevel wheel, the mounting positions are provided with bushings, and two ends of a gear shaft of the driven bevel wheel are connected with the reducer through the bushings so as to limit the driven bevel wheel in the radial direction.
In one embodiment, the reducer is further provided with a cylindrical pin, one end of the cylindrical pin is a spherical surface, a second annular groove is formed in a gear shaft of the driven bevel wheel, and the spherical end of the cylindrical pin is matched with the second annular groove to axially limit the driven bevel wheel.
In one embodiment, the electric differential lock further comprises a sensor engaged with a top surface of the coupling portion of the shift fork.
In one embodiment, a fixed gear sleeve is arranged on a shell of the speed reducer, a contact is arranged on the sensor, an included angle is formed between the top surface of a connecting part of the shifting fork and the horizontal plane where a gear shaft of the driven bevel wheel is located, and the sensor contact has a first matching state which is not in contact with the shifting fork and a second matching state which is in contact with the shifting fork;
in the first matching state, the sliding gear sleeve is meshed with the end face of the fixed gear sleeve, and the speed reducer is locked;
in the second mating state, the sliding gear sleeve is far away from the fixed gear sleeve, and the speed reducer is released.
In one embodiment, the number of teeth of the driving bevel gear is smaller than that of the driven bevel gear.
Above-mentioned electric differential lock through regard as the power supply with the motor to drive the cooperation or the separation of locking subassembly action in order to realize locking subassembly and reduction gear is driven in the action of drive transmission cone pulley group, thereby realizes the locking or the release of reduction gear, has solved and has used the piston structure as the piston cylinder easy corrosion that the driving source caused, easily takes place gas leakage trouble and the locking stroke needs the obstacle to control and leads to unable realization accurate control scheduling problem.
Drawings
FIG. 1 is a schematic structural view illustrating a locking state of an electric differential lock and a speed reducer according to an embodiment of the present disclosure;
FIG. 2 is a schematic structural view illustrating a released state of an electric differential lock and a decelerator according to an embodiment of the present application;
fig. 3 is a schematic structural view of a driving cone pulley of the electric differential lock according to an embodiment of the present application;
FIG. 4 is a schematic structural view of a driven cone pulley of the electric differential lock according to an embodiment of the present application;
FIG. 5 is a side view of a fork of the electric differential lock according to an embodiment of the present application;
fig. 6 is a front view of a fork of an electric differential lock according to an embodiment of the present application.
The speed reducer comprises a speed reducer 1, a fixed gear sleeve 11, an end cover 12, a speed reducer shell 13, a bushing 14, a motor 2, a spline hole 21, a locking assembly 3, a shifting fork 31, a mounting end 311, a mounting hole 312, a fork head 313, a sliding gear sleeve 32, a first ring groove 321, a transmission assembly 4, a driving cone pulley 41, a spline shaft 411, a driven cone pulley 42, a second ring groove 421, a cylindrical pin 5 and a sensor 6.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
As described in the background art, the differential lock in the prior art adopts air pressure as a power source of the differential lock, a piston cylinder structure is required to be adopted for the power source, the piston cylinder structure is prone to faults such as piston cylinder corrosion and gas leakage, and locking travel needs to be controlled by an obstacle, so that the problems that accurate control cannot be achieved and the like are solved.
Based on this, it is necessary to provide an electronic differential lock to the problem that the cylinder rust appears easily in the automobile axle differential lock piston cylinder structure who uses the piston cylinder as the power supply among the prior art, gas leakage trouble and locking stroke need the obstacle to control and lead to unable realization accurate control etc..
Referring to fig. 1 and 2, fig. 1 is a schematic structural diagram illustrating a locked state of an electric differential lock and a speed reducer 1 according to an embodiment of the present invention, and fig. 2 is a schematic structural diagram illustrating a released state of the electric differential lock and the speed reducer 1 according to an embodiment of the present invention.
Referring to fig. 1 and 2, an embodiment of the present application provides an electric differential lock for locking a speed reducer 1, and the electric differential lock includes an electric motor 2, a locking assembly 3, and a transmission assembly 4.
The locking assembly 3 is configured to be capable of cooperating with the reducer 1 to lock the same, and the transmission assembly 4 connects the motor 2 and the locking assembly 3. Wherein the motor 2 is configured to be able to drive the locking assembly 3, through the transmission assembly 4, close to the reducer 1 to engage with the reducer 1, or away from the reducer 1 to disengage from the reducer 1. Specifically, when the locking piece is engaged with the speed reducer 1, the speed reducer 1 is locked, and when the driving assembly is far away from the speed reducer 1, the locking piece is separated from the speed reducer 1, and the speed reducer 1 works normally.
That is to say, through the cooperation of the transmission assembly 4 and the locking assembly 3, the locking assembly 3 is engaged with and disengaged from the speed reducer 1, and then the locking and releasing of the speed reducer 1 are realized to control the working state of the speed reducer 1.
Further, when the motor 2 drives the transmission assembly 4 to work, the transmission assembly 4 drives the locking assembly 3 to move to be close to or far away from the speed reducer 1, locking or releasing of the speed reducer 1 is achieved, piston cylinder parts are not adopted in the locking and releasing processes of the whole speed reducer 1, and therefore the problems that a piston cylinder is prone to rusting, gas leakage faults occur easily, and the locking stroke needs to be controlled by a barrier to cause the fact that accurate control cannot be achieved and the like do not exist.
Referring to fig. 3 and 4, fig. 3 is a schematic structural diagram of a driving cone pulley 41 of an electric differential lock according to an embodiment of the present disclosure, and fig. 4 is a schematic structural diagram of a driven cone pulley 42 of an electric differential lock according to an embodiment of the present disclosure.
In an embodiment of the present application, the transmission assembly 4 includes a driving bevel wheel 41 and a driven bevel wheel 42, a gear shaft of the driving bevel wheel 41 is connected to an output shaft of the motor 2, and the driven bevel wheel 42 is engaged with the driving bevel wheel 41. The driven bevel wheel 42 is connected with the locking assembly 3, and the driven bevel wheel 42 can drive the locking assembly 3 to approach or depart from the speed reducer 1.
Specifically, in an embodiment of the present application, a spline shaft 411 is disposed on a gear shaft of the driving cone 41, a spline hole 21 is disposed on an output shaft of the motor 2, and the driving cone 41 is connected to the motor 2 through a spline. The transmission assembly 4 can drive the transmission assembly 4 to move and realize direction conversion between the driving part and the driven part through the meshing connection of the driving cone pulley 41 and the driven cone pulley 42, and the driving cone pulley 41 is driven to have opposite rotation directions when the motor 2 rotates forwards and reversely when the motor 2 rotates backwards, so that the driven cone pulley 42 has opposite rotation directions. Specifically, when the motor 2 rotates in the forward direction, the driven bevel wheel 41 moves in a direction approaching the speed reducer 1 until the locking assembly 3 engages with the speed reducer 1. When the motor 2 rotates reversely, the driven bevel wheel 41 moves towards the direction away from the speed reducer 1 until the locking assembly 3 is separated from the speed reducer 1.
In this application embodiment, the number of teeth of initiative cone pulley 41 is less than the number of teeth of driven cone pulley 42, can guarantee to increase after the transmission of the output torque of motor 2 between initiative cone pulley 41 and the driven cone pulley 42 to realize the function that increases the turn round at the speed reduction, and then make locking assembly 3 can the efficient mesh with reduction gear 1.
Referring to fig. 5 and 6, fig. 5 is a side view of a fork of an electric differential lock according to an embodiment of the present application, and fig. 6 is a front view of the fork of the electric differential lock according to an embodiment of the present application.
In an embodiment of the present application, the locking assembly 3 includes a shift fork 31 and a sliding gear sleeve 32, one end of the shift fork 31 is connected to the driven bevel wheel 42, the other end of the shift fork 31 is connected to the sliding gear sleeve 32, the shift fork 31 is configured to be capable of moving along an axial direction of a gear shaft of the driven bevel wheel 42 to shift the sliding gear sleeve 32 to be close to or far away from the speed reducer 1, and the sliding gear sleeve 32 is configured to be capable of cooperating with the speed reducer 1 to lock the same.
That is, the rotation of the driven bevel gear 42 can drive the shifting fork 31 to move along the axial direction of the gear shaft of the driven bevel gear 42, and simultaneously, the sliding gear sleeve 32 is shifted to be matched with or away from the speed reducer 1, so that the locking and releasing actions of the speed reducer 1 are realized. When the sliding gear sleeve 32 is engaged with the speed reducer 1, the speed reducer 1 is locked, the speed reduction function of the speed reducer 1 is disabled, and when the sliding gear sleeve 32 is away from the speed reducer 1, the speed reducer 1 is released, and the speed reducer 1 continues to operate.
Further, in some embodiments of the present application, an external thread is provided on the gear shaft of the driven bevel wheel 42, the shift fork 31 has a mounting end 311, the mounting end 311 is provided with a mounting hole 312, an internal thread is provided inside the mounting hole 312, and the shift fork 31 is in threaded connection with the gear shaft of the driven bevel wheel 42, so that the shift fork 31 can be driven to move axially along the gear shaft of the driven bevel wheel 42 when the driven bevel wheel 42 rotates.
Specifically, the driven cone 42 is threadedly engaged with the mounting hole 312 of the shift fork 31, and when the driven cone 42 rotates, the shift fork 31 also moves in the axial direction of the gear shaft of the driven cone 42. Meanwhile, due to the fact that the thread matching has a certain limiting effect, when the driven bevel wheel 42 rotates towards one direction, the shifting fork 31 can generate displacement along the axial direction of the driven bevel wheel 42 and move along one direction. When the driven bevel wheel 42 rotates towards the other direction, the shifting fork 31 moves along the other direction, so that the function that the shifting fork 31 is driven by the rotation of the driven bevel wheel 42 is realized, and the locking and releasing of the speed reducer and the accurate control of the working condition of the speed reducer 1 are further realized.
That is to say, the structure of whole electronic differential lock is by motor 2 drive, initiative cone pulley 41, driven cone pulley 42, shift fork transmission, does not have piston cylinder part, can not appear among the prior art and the piston cylinder structure appears the trouble such as piston cylinder corrosion, gas leakage easily to and the locking stroke needs the obstacle to control and leads to unable realization accurate control scheduling problem.
In some embodiments, the fork 31 further has a fork 313, the sliding gear sleeve 32 is provided with a first annular groove 321, the fork 313 is assembled on the sliding gear sleeve 32, and two end surfaces of the fork 313 are attached to two end surfaces of the first annular groove 321. Preferably, the fork 313 and the sliding tooth sleeve 32 are clamped in the first ring groove 321, and the fork 313 and the circumferential end surface of the first ring groove 321 are not in contact, so as to ensure that the sliding tooth sleeve 32 can rotate in the radial direction thereof.
In an embodiment of the present invention, a gap between the end surfaces of the fork 313 and the first ring groove 321 is less than 5mm, and the fork 313 has two opposite end surfaces, and planes of the two end surfaces are parallel to each other. Meanwhile, the two end surfaces are respectively attached to the two end surfaces of the first ring groove 321 of the sliding gear sleeve 32. Two end surfaces of the fork head 313 of the shifting fork 31 are attached to two end surfaces of the first ring groove 321, so that the shifting fork 31 can be stressed uniformly in the process of shifting the sliding gear sleeve 32, and the high efficiency of power transmission is ensured.
In an embodiment of the present application, the reducer 1 is provided with a plurality of mounting positions for mounting the driven bevel wheel 42, and the mounting positions are provided with the bushings 14, and both ends of the gear shaft of the driven bevel wheel 42 are connected with the reducer 1 through the bushings 14 to radially limit the driven bevel wheel 42. Specifically, the installation position is a stepped hole, a circular hole is further formed in the bushing 14, the bushing 14 is pressed into the installation position, two ends of the gear shaft of the driven bevel wheel 42 are embedded into and connected with the circular hole of the bushing 14, and the rotation action of the driven bevel wheel 42 is not influenced while the gear shaft of the driven bevel wheel is limited by the connection mode.
Preferably, in a preferred embodiment of the present application, the reducer 1 further includes an end cover 12, the end cover 12 is provided with one mounting position, the reducer casing 13 of the reducer is provided with another mounting position, the two mounting positions are respectively provided with the bushings 14, the horizontal positions of the two mounting positions are kept consistent, and two ends of the gear shaft of the driven bevel wheel 42 are respectively mounted on the two mounting positions.
As shown in fig. 1 or fig. 2, in some embodiments of the present application, a cylindrical pin 5 is further disposed on the speed reducer 1, one end of the cylindrical pin 5 is a spherical surface, a second annular groove 421 is disposed on the gear shaft of the driven bevel wheel 42, and the spherical end of the cylindrical pin 5 cooperates with the second annular groove 421 to axially limit the driven bevel wheel 42.
Preferably, the cylindrical pin 5 is provided with a thread diameter, the speed reducer 1 is provided with a threaded hole, and the thread diameter of the cylindrical pin 5 can be matched with the threaded hole on the speed reducer 1. When the diameter of the cylindrical pin 5 is capable of being fitted into the threaded hole of the reduction gear 1, the cylindrical pin 5 is not displaced relative to the reduction gear 1. In addition, the spherical surface of the cylindrical pin 5 can be matched with the second ring groove 421 and does not interfere with the second ring groove 421, so that the axial limit of the gear shaft of the driven bevel wheel 42 is ensured while the rotating action of the gear shaft of the driven bevel wheel 42 is not influenced.
In an embodiment of the present application, the electric differential lock further includes a sensor 6, and the sensor 6 is engaged with a top surface of the coupling portion of the shift fork 31. Preferably, the sensor 6 is mounted on the reducer housing 13 of the reducer, the sensor 6 has a threaded diameter, and the threaded diameter of the sensor 6 is connected with a threaded hole on the reducer 1 housing to ensure that the relative position of the sensor 6 with respect to the reducer 1 housing and the driven bevel gear 42 is fixed.
Further, in a preferred embodiment of the present application, the upper surface of the mounting portion of the fork 31 is a trapezoidal side to realize two different fitting states of the sensor 6 and the mounting portion of the fork 31. Specifically, the length of the sensor 6 extending out of the shell of the speed reducer 1 is not changed, when the shifting fork 31 moves, the contact condition of the sensor 6 and the shifting fork 31 is changed, so that the state detection of the shifting fork 31 is realized, and the different position states of the shifting fork 31 further reflect the position relation of the sliding gear sleeve 32 relative to the speed reducer 1. That is, the contact state between the sensor 6 and the trapezoidal upper surface of the fork 31 can determine whether the decelerator 1 is in the locked state or the released state, and control the operation state of the motor 2.
In an embodiment of the present application, the casing of the speed reducer 1 is provided with a fixed gear sleeve 11, the sensor 6 is provided with a contact, a top surface of the connecting portion of the shift fork 31 and a horizontal plane where a gear shaft of the driven bevel wheel 42 is located have an included angle, and the contact of the sensor 6 has a first matching state which is not in contact with the shift fork and a second matching state which is in contact with the shift fork. In the first engagement position, the sliding sleeve gear 32 engages with the end face of the fixed sleeve gear 11, and the gear 1 is locked, and in the second engagement position, the sliding sleeve gear 32 is away from the fixed sleeve gear 11, and the gear 1 is released.
In an embodiment of the present application, when a locking command of the speed reducer 1 is to be performed, it is first determined whether the sensor 6 is in the first engagement state, if so, the motor 2 drives the driving bevel wheel 41 to operate, and if not, the speed reducer is locked. When a retarder 1 release command is to be made, the reverse of the lock-up command is made.
Specifically, when the motor 2 rotates in one direction, the driving bevel wheel 41 is driven to rotate, the driving bevel wheel 41 drives the driven bevel wheel 42 to rotate, and the driven bevel wheel 42 drives the shifting fork 31 to move until the first matching state is reached. When the matching state is to be switched, the motor 2 rotates along the second direction, and then the driving cone pulley 41 and the driven cone pulley 42 are driven to rotate reversely, and the shifting fork 31 moves reversely until the second matching state is reached.
The whole electric differential lock does not relate to a piston rod, and the problems that a piston cylinder adopted in the prior art is easy to rust, gas leakage faults are easy to occur, and locking stroke needs barriers to control, so that accurate control cannot be achieved are solved.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An electric differential lock for locking a speed reducer, comprising:
a motor;
a locking assembly configured to be engageable with the retarder to lock the same; and
the transmission assembly is connected with the motor and the locking assembly;
wherein the motor is configured to drive the locking assembly closer to the speed reducer to engage with the speed reducer or away from the speed reducer to disengage with the speed reducer via the transmission assembly.
2. The electric differential lock as claimed in claim 1, wherein the transmission assembly includes a driving bevel wheel and a driven bevel wheel, a gear shaft of the driving bevel wheel is connected to an output shaft of the motor, and the driven bevel wheel is engaged with the driving bevel wheel; the driven cone pulley is connected with the locking assembly, and the driven cone pulley can drive the locking assembly to be close to or far away from the speed reducer.
3. The electric differential lock of claim 2 wherein the locking assembly comprises a shift fork and a sliding sleeve gear, one end of the shift fork is connected to the driven bevel wheel, the other end of the shift fork is engaged with the sliding sleeve gear, the shift fork is configured to move axially along a gear shaft of the driven bevel wheel to shift the sliding sleeve gear closer to or farther away from the speed reducer, and the sliding sleeve gear is configured to cooperate with the speed reducer to lock the speed reducer.
4. The electric differential lock as claimed in claim 3, wherein the gear shaft of the driven bevel wheel is provided with an external thread, the shifting fork is provided with a mounting end, the mounting end is provided with a mounting hole, an internal thread is provided inside the mounting hole, and the shifting fork is in threaded connection with the gear shaft of the driven bevel wheel, so that the shifting fork can be driven to move axially along the gear shaft of the driven bevel wheel when the driven bevel wheel rotates.
5. The electric differential lock as claimed in claim 4, wherein the fork further comprises a fork head, the sliding gear sleeve is provided with a first annular groove, the fork head is assembled on the sliding gear sleeve, and two end faces of the fork head are attached to two end faces of the first annular groove.
6. The electric differential lock as claimed in claim 2, wherein the speed reducer is provided with a plurality of mounting positions for mounting the driven bevel wheel, and the mounting positions are provided with bushings, and both ends of the gear shaft of the driven bevel wheel are connected with the speed reducer through the bushings so as to radially limit the driven bevel wheel.
7. The electric differential lock as claimed in claim 5 or 6, wherein the speed reducer is further provided with a cylindrical pin, one end of the cylindrical pin is spherical, the gear shaft of the driven bevel wheel is provided with a second annular groove, and the spherical end of the cylindrical pin is matched with the second annular groove to axially limit the driven bevel wheel.
8. The electric differential lock of claim 7 further comprising a sensor that engages a top surface of the connecting portion of the fork.
9. The electric differential lock as claimed in claim 8, wherein a fixed gear sleeve is provided on the housing of the speed reducer, a contact is provided on the sensor, an angle is formed between a top surface of the connecting portion of the shift fork and a horizontal plane on which the gear shaft of the driven bevel wheel is located, and the sensor contact has a first engagement state in which it is not in contact with the shift fork and a second engagement state in which it is in contact with the shift fork;
in the first matching state, the sliding gear sleeve is meshed with the end face of the fixed gear sleeve, and the speed reducer is locked;
in the second mating state, the sliding gear sleeve is far away from the fixed gear sleeve, and the speed reducer is released.
10. An electrically operated differential lock as claimed in claim 2 wherein the number of teeth of the driving cone wheel is less than the number of teeth of the driven cone wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110820426.1A CN113669428A (en) | 2021-07-20 | 2021-07-20 | Electric differential lock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110820426.1A CN113669428A (en) | 2021-07-20 | 2021-07-20 | Electric differential lock |
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| Publication Number | Publication Date |
|---|---|
| CN113669428A true CN113669428A (en) | 2021-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110820426.1A Pending CN113669428A (en) | 2021-07-20 | 2021-07-20 | Electric differential lock |
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Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3400610A (en) * | 1966-03-31 | 1968-09-10 | Ford Motor Co | Locking differential gear |
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| CN110486442A (en) * | 2019-08-07 | 2019-11-22 | 一汽解放汽车有限公司 | A kind of differential lock and axle assembly |
| CN210440549U (en) * | 2018-12-28 | 2020-05-01 | 观致汽车有限公司 | Electric control lock type differential mechanism |
| CN212744924U (en) * | 2020-07-23 | 2021-03-19 | 一汽解放汽车有限公司 | Electromagnetic differential lock structure and automobile axle |
| CN214367587U (en) * | 2021-01-11 | 2021-10-08 | 一汽解放汽车有限公司 | Differential lock structure and axle assembly |
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| US3400610A (en) * | 1966-03-31 | 1968-09-10 | Ford Motor Co | Locking differential gear |
| US6503167B1 (en) * | 2000-09-28 | 2003-01-07 | Spicer Technology, Inc. | Externally actuated locking differential assembly |
| JP2003172429A (en) * | 2001-09-26 | 2003-06-20 | Tochigi Fuji Ind Co Ltd | Actuator and differential device using the same |
| US20070197338A1 (en) * | 2006-02-20 | 2007-08-23 | Gkn Driveline Torque Technology Kk | Differential device |
| CN202418476U (en) * | 2011-12-02 | 2012-09-05 | 青特集团有限公司 | Novel built-in differential lock |
| CN202371108U (en) * | 2011-12-16 | 2012-08-08 | 湖南中联重科车桥有限公司 | Interaxial differential device |
| CN207261605U (en) * | 2017-10-10 | 2018-04-20 | 陕西汉德车桥有限公司 | A kind of differential lock assembly and the vehicle with the differential lock assembly |
| DE102017009533A1 (en) * | 2017-10-13 | 2019-04-18 | Daimler Ag | Differential Soerre and a method for mounting the differential lock |
| CN110388438A (en) * | 2018-04-19 | 2019-10-29 | 舍弗勒技术股份两合公司 | Differential locking-device and differential mechanism for differential mechanism |
| CN208634308U (en) * | 2018-05-31 | 2019-03-22 | 一汽解放汽车有限公司 | A kind of novel differential lock unit structure |
| CN109017291A (en) * | 2018-07-27 | 2018-12-18 | 汽解放汽车有限公司 | A kind of penetrating bridge main speed reducer assembly |
| CN210440549U (en) * | 2018-12-28 | 2020-05-01 | 观致汽车有限公司 | Electric control lock type differential mechanism |
| CN110486442A (en) * | 2019-08-07 | 2019-11-22 | 一汽解放汽车有限公司 | A kind of differential lock and axle assembly |
| CN212744924U (en) * | 2020-07-23 | 2021-03-19 | 一汽解放汽车有限公司 | Electromagnetic differential lock structure and automobile axle |
| CN214367587U (en) * | 2021-01-11 | 2021-10-08 | 一汽解放汽车有限公司 | Differential lock structure and axle assembly |
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