81 results about "Locking differential" patented technology

Disclosed is a power distribution device, including: a case rotatably provided; a first side gear connected to a first wheel; a second side gear connected to a second wheel; a pinion gear meshed with the first side gear and the second side gear; a cage provided to support the pinion gear and to be capable of relative rotation with respect to the case; a first lock plate contacting and spaced apart from the first side gear such that the first side gear is synchronized and unsynchronized with the case; and a second lock plate contacting and spaced apart from the cage such that the cage is synchronized and unsynchronized with the case. Accordingly, it is possible to improve a size, mountability, weight and cost, and to suppress unintentional release of the lock differential, as the disconnecting function and lock differential function are implemented.

The present disclosure relates to an electronic locking differential gear mechanism having a lock detection mechanism for sensing and indication of a locked and unlocked state of the locking mechanism. The electronic locking differential gear mechanism includes an electronic stator which, when activated, rotates a ramped collar about an axis of the mechanism. The ramps of the ramped collar axially displace a plurality of push rods, which displace a locking collar and cause it to engage with a locker gear, placing the mechanism in a locked state. A sensor assembly detects the displacement of a sensing plate which is displaced along with the push rods, and thereby senses whether the mechanism is in a locked or unlocked state.

The invention relates to a locking differential gear mechanism (1), comprising three connection points (2, 3, 4), wherein at least one locking device (18, 19) is provided, which in each case has a respective actuating device (20) and friction discs (26, 27) situated axially next to each other, a plurality of which are in the form of couplable friction discs (26) and at least one of which is in the form of a friction disc (27) permanently coupled to one of the connection points (2, 3, 4). The couplable friction discs (26) are each equipped with a respective coupling profile (31), wherein the at least one locking device (18, 19) in each case has an associated sliding element, which is guided in a rotationally fixed and axially displaceable manner on the part of another of the connection points (2, 3, 4). The in each case one sliding element can be axially overlapped by a different number of the couplable friction discs (26) by axial displacement and depending on its axial position and in so doing can in each case be connected in a rotationally fixed manner to overlapping, couplable friction discs (26) by being respectively held in the respective coupling profile (31). Here, the in each case one sliding element is designed as a respective annular shift collar (32) which is arranged coaxially and radially adjacent to the friction discs (26, 27) and is equipped with a respective engagement profile (34) at which the respective holding in the respective coupling profile (31) takes place.

Locking differential systems, vehicles and methods are provided. An electric vehicle includes an electric motor including a stator and a rotor, wherein the rotor is configured to rotate about a rotor axis; a rotor shaft connected to the rotor for rotation about the rotor axis; a differential located within the rotor shaft; a first input shaft connected to first side of the differential; a second input shaft connected to second side of the differential; a locking system configured to selectively lock rotation of the first input shaft to rotation of the rotor shaft; a control system configured to determine when to lock rotation of the first input shaft to rotation of the rotor shaft; and an actuation system configured to operate the locking system to lock rotation of the first input shaft to rotation of the rotor shaft.

The utility model discloses a limited slip locking differential which comprises a driving ring and a driven ring, the driving ring is connected with the driven ring in a meshed mode, and a separating mechanism is arranged between the driving ring and the driven ring. The driven ring sleeves the outer side of the shaft side gear and is in transmission connection with the shaft side gear; a limiting protruding ring and transmission teeth are integrally formed on the periphery of the shaft side gear, and the transmission teeth are located on one side of the limiting protruding ring and connected with a first transmission tooth groove formed in the inner circumferential side wall of the driven ring in a meshed mode. A positioning ring is arranged between the limiting convex ring and the driven ring, a second transmission tooth groove is formed in the inner circumferential side wall of the positioning ring, the positioning ring is in meshed connection with the transmission teeth through the second transmission tooth groove, and one side of the positioning ring makes contact with the limiting convex ring to achieve abutting limiting. The other side of the positioning ring is connected with the side wall of the side, away from the driving ring, of the driven ring through a damping mechanism.

[Problem] To provide an axle driving device with a locking differential gear assembly, wherein the pressing force from the clutch pack does not act on the bearings of a differential case when the differential function is restricted.[Solution] The clutch pack includes a clutch housing, a first friction plate, a second friction plate, and a reaction plate, the clutch housing is engaged with the differential case relatively non-rotatably and axially movably, the friction plates are engaged with an axle and the clutch housing, respectively, relatively non-rotatably and axially movably and in a superposed manner, the reaction plate adjacent to the friction plates can freely press them, and the clutch housing is disposed opposite to the reaction plate to face a wall, and a first thrust bearing is disposed therebetween.

A locking differential may be an electric locking differential with a bushing and an annular position sensor which are affixed. The bushing and the annular position sensor may axially translate relative to an actuation side housing of the electric locking differential. A target ring may be affixed to the actuation side housing. The target ring may be at a fixed axial position relative to a locking side gear. The annular position sensor may be at a fixed axial position relative to a clutch plate. The annular position sensor may determine a relative axial position between the annular position sensor and the target ring. The relative axial position may indicate a relative axial position between the clutch plate and the locking side gear, thereby indicating whether the electric locking differential is locked or unlocked.

The present disclosure relates to an electronic locking differential gear mechanism having a lock detection mechanism for sensing and indication of a locked and unlocked state of the locking mechanism. The electronic locking differential gear mechanism includes an electronic stator which, when activated, rotates a ramped collar about an axis of the mechanism. The ramps of the ramped collar axially displace a plurality of push rods, which displace a locking collar and cause it to engage with a locker gear, placing the mechanism in a locked state. A sensor assembly detects the displacement of a sensing plate which is displaced along with the push rods, and thereby senses whether the mechanism is in a locked or unlocked state.

The invention belongs to the technical field of automobile transmission, and particularly relates to an electromagnetic self-locking differential structure which comprises a shell, a planet shaft, a first half axle gear, a second half axle gear, a planet gear, an electromagnetic driving part, a sliding lock and an elastic reset part. A sliding lock is arranged in a right half shell, the meshing positions of a second half axle gear, a planetary gear and a first half axle gear can be displaced leftwards, a shaft sleeve extends out of one side of the second half axle gear and is positioned in a second positioning hole, a second spline hole is formed in the shaft sleeve, and the second spline hole deviates rightwards relative to the second half axle gear. Therefore, the connection position of the second half axle gear and the original spline half axle of the vehicle can be kept consistent. The extension sleeve is arranged on one side of the first half axle gear, the first spline hole is formed in the extension sleeve, the first spline hole is staggered rightwards relative to the first half axle gear, and therefore it can be guaranteed that the connection position of the first half axle gear and the original spline half axle of the vehicle is kept consistent.

Locking differential systems, vehicles, and methods are provided. An electric vehicle includes an electric motor including a stator and a rotor, where the rotor is configured to rotate about a rotor axis; a rotor shaft connected to the rotor for rotation about a rotor axis; a differential positioned within the rotor shaft; a first input shaft connected to a first side of the differential; a second input shaft connected to a second side of the differential; a locking system configured to selectively lock rotation of the first input shaft to rotation of the rotor shaft; a control system configured to determine when to lock rotation of the first input shaft to rotation of the rotor shaft; and an actuation system configured to operate the locking system to lock rotation of the first input shaft to rotation of the rotor shaft.

A system for axially preloading a component, comprising a housing (202) and a component (208) disposed radially internal to the housing (202). The housing (202) comprises a threaded inner circumferential surface (210) with a first thread pitch (P1). The system further comprises an outer annulus (224) radially inward of the housing (202), comprising a threaded outer circumferential surface with a thread pitch substantially equal to the first thread pitch (P1) and a threaded inner circumferential surface with a second thread pitch (P2) and an inner annulus (234) radially inward of the outer annulus (224), comprising a threaded outer circumferential surface with a thread pitch substantially equal to the second thread pitch (P2). The housing (202) is provided with a first number (N1) of keyways disposed around its circumference. The outer annulus (224) is provided with a second number (N2) of keyways disposed around its circumference. The inner annulus is provided with a third number (N3) of keyways disposed around its circumference. The outer annulus (224) is configured to rotate with respect to the housing (202) to enable alignment of a keyway provided in the outer annulus (224) and a keyway in the housing (202). The inner annulus (234) is configured to rotate with respect to the outer annulus (224) to enable alignment of a keyway provided in the inner annulus (234) and a keyway in the outer annulus (224). The inner annulus (234) is configured to be translated axially towards the component (208) upon rotation of the outer annulus (224) when the inner annulus (234) and the housing (202) are rotationally locked to one another.

Lash can be mitigated in a locking system of a differential assembly to improve lock detection accuracy. A sensor tracks the position of an armature arrangement that moves in response to the energization / de-energization of an electromagnet to lock and unlock the differential assembly. Reducing lash allows a detection system to better determine a position of the armature based on the sensor readings. Example structures to reduce lash include a biasing ring to hold the armature at a specific position; a shim disposed between the differential case and the stator to hold the stator at a specific position relative to the differential case; and a stop member to hold the armature at a specific position when the differential assembly is unlocked.

The present invention belongs to the technical field of differentials, and particularly refers to an electromagnetic locking differential, comprising a housing with a chamber, wherein the front half-shaft helical teeth, the rear half-shaft helical teeth, the front planetary gear and the rear planetary gear are rotatably connected in the chamber, the rear half-shaft helical teeth are provided with a meshing tooth 1, the chamber is provided with a spur tooth 1, a locking ring is provided in the chamber, the outer ring of the locking ring is provided with a spur tooth 2, and the inner ring is provided with a meshing tooth 2; an electromagnetic coil is provided at the front side of the housing, a suction ring is provided between the electromagnetic coil and the housing, the suction ring is fixedly connected to the front end of a pull rod, the rear end of the pull rod is fixedly connected to the locking ring, and a reset spring is provided between the locking ring and the rear planetary gear. The present invention uses the magnetic field generated by the electromagnetic coil being energized to enable the suction ring to be subjected to a forward magnetic attraction in the magnetic field, thereby being able to drive the locking ring to move forward through the pull rod, so that the meshing tooth 1 of the rear half-shaft helical teeth is meshed with the meshing tooth 2 of the locking ring, and 100% locking of the differential is achieved.

A separating device with a locking differential, comprising a housing (10), a support ring (20) arranged in the housing (10) and configured to enclose a pinion (40), and a clutch ring (30) connected to a sleeve (60) configured to be actuated by an actuating device (50), wherein the clutch ring (30) is configured to move in an engagement direction when the sleeve (60) is actuated by the actuating device (50) to engage a first engagement section (331) located at an end (31) of the clutch ring (30) positioned in the housing (10) with a second engagement section (22) located on a surface of the support ring (20) to achieve four-wheel drive.

The utility model relates to the field of differential mechanisms, in particular to a lock type differential mechanism which comprises a differential mechanism shell, a first half shaft and a second half shaft are rotationally installed on the two sides in the differential mechanism shell respectively, and a first support is fixed to the side, close to the first half shaft, of the top of the differential mechanism shell. The lock type differential mechanism has the advantages that the lock type differential mechanism overcomes the defects of a common differential mechanism by forcibly eliminating the rotating speed difference, when the locking mechanism is activated, the first support is fixed on the top of the differential mechanism shell, the second support is fixed on the side, close to the second half shaft, of the top of the differential mechanism shell, and the opposite ends of the first half shaft and the second half shaft can be connected through the locking mechanism. The half axle gear of the differential mechanism is physically locked, so that the first half axle and the second half axle are rigidly connected and become an integrated driving shaft, wheels on the two sides must rotate synchronously, even if the wheel on one side is suspended or slips, the wheel on the other side can still obtain engine torque, and therefore it is guaranteed that the vehicle gets out of order.

A locking differential may be an electric locking differential with an electromagnet which actuates a clutch plate. The electric locking differential may include a final drive gear. The electromagnet may not rotate with the final drive gear. The electric locking differential may also include an actuation side housing. The actuation side housing may be affixed to the final drive gear. The electromagnet may cause an electromagnetic field to couple from a ferrous housing of the electromagnet to the actuation side housing. The electromagnetic field may axially translate the electromagnet relative to the actuation side housing. The ferrous housing and the actuation side housing may include a chamfered edge through which the electromagnetic field couples.

The present disclosure relates to an electronic locking differential gear mechanism having a lock detection mechanism for sensing and indication of a locked and unlocked state of the locking mechanism. The electronic locking differential gear mechanism includes an electronic stator which, when activated, rotates a ramped collar about an axis of the mechanism. The ramps of the ramped collar axially displace a plurality of push rods, which displace a locking collar and cause it to engage with a locker gear, placing the mechanism in a locked state. A sensor assembly detects the displacement of a sensing plate which is displaced along with the push rods, and thereby senses whether the mechanism is in a locked or unlocked state. Anti-rotation lugs interact with a tab of the sensor assembly to prevent rotation of the sensing plate relative to other components.

A method for controlling the automatic start of a motor vehicle comprising an electronically controllable locking differential when driving uphill with μ-disengagement is described. The method comprises the following steps: determining the positive gradient of the underlying surface; defining an initial locking torque according to the determined positive gradient and according to the component of torque required for the vehicle to travel uphill with only the first drive wheel driven; if a reference speed V Ref At 0 and critical speed V Crit According to SR xx =(V xx ‑V Ref ) / V Crit Calculate the slip ratio SR of the first driving wheel xx xx , and if the reference speed V Ref Above critical speed V Crit According to SR xx =(V xx ‑V Ref ) / V Ref Calculate the slip ratio SR of the first driving wheel xx xx ; and limiting the locking torque of the electronically controllable locking differential according to the slip ratio of the first drive wheel.

A control system is configured to determine a differential state of a vehicle. The control system includes a first wheel sensor, a second wheel sensor, and an electronic controller. The first wheel sensor is configured to detect a first wheel speed of a first wheel. The second wheel sensor is configured to detect a second wheel speed of a second wheel. The electronic controller is configured to determine whether the first wheel speed is equal to or different from the second wheel speed, and to turn off an indicator when the first wheel speed is different from the second wheel speed. The indicator is illuminated to indicate a locked differential state of the vehicle.

A vehicle includes an anti-lock braking system (ABS), a stability control system (SCS), and an electronically lockable differential. A controller of the vehicle is programmed to unlock the differential in response to activation of the ABS or the SCS. The controller is further programmed to prohibit locking of the differential for a pre-defined period of time in response to deactivation of one of the ABS and the SCS that is activated.

A method for determining the rotational speeds of several wheels of a vehicle (1) with a transmission unit (3) and several locking differential units is shown and described.wherein the method comprises the following step: determining a rotational speed of a second output section (17) of each locking differential unit (5) both from the detected rotational speed of the first output section (9) of the corresponding locking differential unit (5) and from the detected rotational speed of the input section (11) of the first locking differential unit of the multiple locking differential units and the detected rotational speed of the input section (11) of the second locking differential unit of the multiple locking differential units, or from the detected rotational speed of the input section (13) of the transmission unit (3) and the detected rotational speed of the input section (11) of the locking differential unit (5) of the multiple locking differential units, or from the detected rotational speed of the input section (13) of the transmission unit (3) and the detected rotational speed of the output section (15) of the transmission unit (3). Furthermore, a device, a vehicle (1),a computer program and a computer-readable medium are represented and described.

The utility model provides a self-locking differential assembly which comprises a shell, a planetary gear assembly, a side gear, a first main gear and a planetary gear carrier, the planetary gear assembly comprises a planetary gear and a rotating shaft, a semi-closed frame is arranged on the outer side of the planetary gear carrier, the frame is fixedly connected with the planetary gear carrier, a locking mechanism is arranged on the outer side of the frame, and the side gear is fixedly connected with the side gear. The locking mechanism comprises a shell, a motor is arranged at the end, away from the frame, of the shell, an output shaft of the motor is connected with a lead screw, a locking block assembly is arranged in the shell and comprises a connecting block and a plurality of sliding blocks, the sliding blocks are slidably connected with the shell, the connecting block is in threaded connection with the lead screw, and locking grooves matched with the sliding blocks are formed in the ends, close to the sliding blocks, of rotating shafts. The locking block assembly is inserted into the rotating shaft through the locking groove. According to the self-locking differential mechanism assembly, the frame is installed on the planetary gear carrier, the locking mechanism is installed on the frame, the locking block assembly is connected with the rotating shaft in an inserted mode, axial spinning of the planetary gear assembly is locked, and therefore the self-locking function of the differential mechanism is achieved.

The utility model relates to a differential locking assembly. In one example, a locking differential assembly includes an input gear configured to be rotationally coupled to an upstream component; a housing coupled to the input gear; and a lock clutch configured to lock rotation of the housing and the side gear in an engaged configuration. The lock differential assembly also includes an actuation system configured to engage and disengage the lock clutch according to the steering angle.

The application is suitable for the technical field of differential lock control, and provides a differential lock control method, device, vehicle and storage medium, wherein the method comprises the following steps: acquiring vehicle running parameters corresponding to a target differential lock of a target vehicle when the target differential lock is locked; judging whether the target vehicle has escaped from a trouble according to the vehicle running parameters and a preset non-escape-from-trouble condition; and controlling the target differential lock to be unlocked when the target vehicle has escaped from the trouble. After the differential lock is locked, whether the vehicle has escaped from the trouble is judged according to the vehicle running parameters corresponding to the locked differential lock and the preset non-escape-from-trouble condition, and the locked differential lock is automatically unlocked only when the vehicle has escaped from the trouble, which helps to improve the driving experience and driving safety of the user.

This disclosure provides an electric drive system (10) for a vehicle. The electric drive system (10) comprises a first planetary gear system (20) and a second planetary gear system (30), which is a compound planetary gear system and includes an inner planetary gear set (30a) and an outer planetary gear set (30b). The second planetary gear system (30) includes a double-sided gear (33) configured between the inner planetary gear set (30a) and the outer planetary gear set (30b) such that the double-sided gear (33) acts as the inner ring gear of the inner planetary gear set (30a) and as the outer sun gear for the outer planetary gear set (30b). The electric drive system (10) is configured to function as an open differential, a limited-slip differential, and a self-locking differential, while reducing the overall weight of the vehicle, resulting in improved vehicle range and efficiency.

A braking system includes brake circuits and a brake stability module. The brake circuits are configured to be independently activated and deactivated and when activated apply braking force at respective wheels of a vehicle. The braking stability module is configured to i) detect a failure with a first one of the brake circuits of a first axle of the vehicle, ii) lock or adjust an amount of engagement of a differential of the first axle of the vehicle to distribute brake force from a second one of the brake circuits of the first axle to one of the wheels at the first one of the brake circuits, and iii) control operation of the second one of the brake circuits to brake torque the one of the wheels at the first one of the brake circuits.

A system includes a reference speed module and a motor control module. The reference speed module is configured to determine a reference speed range based on a speed of a left wheel of a pair of front wheels or rear wheels of a vehicle and a speed of a right wheel of the pair of front wheels or rear wheels. The right wheel is decoupled from the left wheel. The motor control module is configured to control at least one of a first electric motor and a second electric motor based on the reference speed range. The first electric motor is connected to the left wheel. The second electric motor is connected to the right wheel.

The utility model belongs to the technical field of differential locks, and provides a hydraulic differential lock type differential mechanism which comprises a reducer shell. A pipeline is arranged in the reducer shell, a hydraulic oil inlet communicated with the pipeline is formed in the outer wall of the reducer shell, the piston assembly is arranged on the inner side of the cover plate assembly in a sliding mode, the cover plate assembly and the piston assembly form a sealing cavity, and the sealing cavity is communicated with the pipeline through an oil way. The right end of the piston assembly abuts against the push disc, the right end of the push disc abuts against the pressing disc, the friction plate set is arranged between the pressing disc and the differential mechanism right shell, and a gap is formed between the friction plate set and the pressing disc. The left end of the bolt is fixed to the connecting shell, a through hole matched with the bolt is formed in the pressing disc, the right end of the bolt penetrates through the through hole, and the bolt is sleeved with a return spring. According to the hydraulic differential lock type differential mechanism, the piston assembly is pushed to move rightwards through hydraulic force, the pressure is transmitted to the pushing disc and the pressing disc and finally transmitted to the friction plate set, the splined hub and the connecting shell rotate synchronously, and then synchronous rotation of the left half shaft and the right half shaft is achieved. The structure is simple, reliability is high and safety performance is good.

The present disclosure relates to an electronic limited-slip differential mechanism with a locking detection mechanism for sensing and indicating a locked and unlocked state of the locking mechanism. The electronic limited-slip differential includes an electronic stator which, when activated, rotates a ramp ring about an axis of the mechanism. The ramps of the ramp ring axially displace a plurality of pushrods, which displace a locking ring and cause it to engage with a locking gear, thereby placing the mechanism in a locked state. A sensor assembly detects the displacement of a sensing plate, which is displaced along with the pushrods, and thereby determines whether the mechanism is in a locked or unlocked state.Anti-rotation lugs interact with a tab on the sensor assembly to prevent rotation of the sensing plate relative to other components.

A stator of a lock differential includes an inner lip recessed into a central opening. The inner lip is engaged with the bearing race to secure the stator to a gear housing of a lock-in differential. The stator holds the electromagnetic coil. The stator is shaped to avoid electromagnetic flux pinch points that may limit the magnitude of an electromagnetic force applied to a locking device of the lock differential.