CN109882525B

CN109882525B - Bidirectional controllable overrunning clutch and control method thereof

Info

Publication number: CN109882525B
Application number: CN201910326112.9A
Authority: CN
Inventors: 尹倪; 岳汉奇; 蔡文奇; 韩毓东; 楚汉昆; 高炳钊
Original assignee: Jilin Bocheng Transmission System Technology Co ltd
Current assignee: Jilin Bocheng Transmission System Technology Co ltd
Priority date: 2019-04-23
Filing date: 2019-04-23
Publication date: 2024-06-18
Anticipated expiration: 2039-04-23
Also published as: CN109882525A

Abstract

The invention provides a bidirectional controllable overrunning clutch which comprises a retainer driving assembly, a roller executing assembly and a control assembly, wherein the control end of the retainer driving assembly is coaxially and fixedly connected with a retainer of the roller executing assembly, a plurality of spindle-shaped spaces with narrow two ends and wide middle are formed between the outer wall of an inner ring and the inner wall of an outer ring in the roller executing assembly, a plurality of shifting frames are arranged on the circumferential direction of the retainer perpendicular to the end face of the retainer, the shifting frames of the retainer are sleeved between the inner ring and the outer ring, the shifting frames of the retainer are in one-to-one correspondence with the spindle-shaped spaces, the rollers are correspondingly arranged in the shifting frames of the retainer, the rollers move in the circumferential direction in the spindle-shaped spaces between the corresponding inner ring and the outer ring under the rotation driving of the retainer, and the control assembly is in control connection with the retainer driving assembly so as to control the retainer driving assembly to drive the retainer to rotate axially. The bidirectional controllable overrunning clutch has stable and reliable performance, simple and compact structure and good control performance.

Description

Bidirectional controllable overrunning clutch and control method thereof

Technical Field

The invention belongs to the technical field of clutches in mechanical automatic transmissions and control thereof, and particularly relates to a bidirectional controllable overrunning clutch and a control method thereof.

Background

With the gradual maturity of the pure electric vehicle market, the market has put higher demands on the comfort, the dynamic property and the economy of the pure electric vehicle. In order to meet the diversified use requirements, the multi-gear shift of the electric vehicle driving system is an important development trend of pure electric vehicles nowadays.

Mechanical automatic transmissions have been developed based on manual transmissions. The mechanical automatic transmission keeps the advantages of high transmission efficiency, low cost, convenient operation and the like of the traditional manual transmission, and is widely applied.

Aiming at the performance characteristics of the pure electric vehicle, chinese patent: a technical scheme of a two-gear mechanical automatic transmission for a pure electric vehicle based on a clutch is provided in a power-interruption-free gear shifting gearbox of an electric vehicle and a gear shifting control method (CN 105864368A) of the gear shifting gearbox. According to the technical scheme, through the combination of the bidirectional controllable overrun clutch and the friction plate dry clutch, unpowered interruption switching of two gears is realized. The automatic control of the bidirectional controllable overrunning clutch is an important technology of the transmission, and the controllability of the bidirectional controllable overrunning clutch directly determines whether the transmission can realize reverse gear.

Aiming at the gear box, china patent: a bidirectional controllable overrunning clutch (CN 104595381B) is provided. The technical scheme of the patent utilizes the electromagnetic coil to drive the control mechanism to realize four working modes of forward unidirectional overrunning, reverse unidirectional overrunning, bidirectional overrunning and bidirectional wedging. The clutch has the advantages of more parts, high axial space requirement, difficult arrangement, high coupling degree among all parts and difficult product modification and maintenance. In addition, the clutch is not provided with a mounting sensor for detecting the position of the actuating mechanism, once the fault occurs, the fault cannot be rapidly diagnosed so as to be effectively processed, and the reliability of the system is low.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a bidirectional controllable overrunning clutch and a control method thereof, and the bidirectional controllable overrunning clutch has stable and reliable performance, simple and compact structure and good control performance, and the technical scheme of the invention is as follows in combination with the attached drawings of the specification:

A bidirectional controllable overrunning clutch consists of a retainer driving component, a roller executing component and a control component;

the control tail end of the retainer driving assembly is fixedly connected with the retainer 4 of the roller executing assembly in a coaxial manner;

The roller executing assembly consists of an inner ring 1, an outer ring 2, rollers 3 and a retainer 4, wherein the outer ring 2 is coaxially sleeved on the outer side of the inner ring 1, a plurality of shuttle-shaped spaces with narrow two ends and wide middle are formed between the outer wall of the inner ring 1 and the inner wall of the outer ring 2, the retainer 4 is of a cylindrical frame structure, a plurality of poking frames are arranged on the circumferential direction of the retainer 4 perpendicular to the end face of the retainer 4, the retainer 4 is sleeved between the inner ring 1 and the outer ring 2, the poking frames of the retainer 4 correspond to the shuttle-shaped spaces formed between the outer wall of the inner ring 1 and the inner wall of the outer ring 2 one by one, the rollers 3 are correspondingly arranged in the poking frames of the retainer 4, and the rollers 3 move in the circumferential direction in the shuttle-shaped spaces between the corresponding inner ring 1 and the outer ring 2 under the driving of the retainer 4;

the control assembly is in control connection with the retainer driving assembly so as to control the retainer driving assembly to drive the retainer 4 to axially rotate.

Further, the retainer driving assembly consists of a driving motor 10, a worm gear reduction box 9, a flexible coupling 7, a driving gear 6 and a driven gear 11;

The output shaft of the driving motor 10 is coaxially and fixedly connected with the input shaft of the worm gear reduction box 9, the output shaft of the worm gear reduction box 9 is coaxially connected with the gear shaft of the driving gear 6 through the flexible coupling 7, the worm gear reduction box 9 is fixed on the gearbox shell, and the driving gear 6 is meshed with the driven gear 11 coaxially fixed on the end face of the retainer 4.

Further, the control component consists of a controller, a shading disc 5 and an infrared correlation photoelectric sensor 8;

the control signal output end of the controller is connected with the control signal input end of the driving motor 10;

The infrared opposite-shooting photoelectric sensor 8 is arranged on the outer surface of the shell on one side of the output end of the worm gear reduction box 9, the shading disc 5 is coaxially arranged on the output shaft of the worm gear reduction box 9, the shading disc 5 and the infrared opposite-shooting photoelectric sensor 8 are arranged in a matching mode, when the shading disc 5 is driven by the output shaft of the worm gear reduction box 9 to rotate along the axial direction, the infrared opposite-shooting photoelectric sensor 8 is completely shielded from the shading disc 5 so as to prevent the infrared opposite-shooting photoelectric sensor 8 from receiving and transmitting infrared signals, the infrared opposite-shooting photoelectric sensor 8 moves out of the coverage area of the shading disc 5 so as to recover the receiving and transmitting infrared signals, the retainer 4 drives the roller 3 to drive the other end of the fusiform space from one end corresponding to the fusiform space under the driving of the retainer, the signal output end of the infrared opposite-shooting photoelectric sensor 8 is connected with the signal input end of the controller, and the rotation angle change condition of the output shaft of the worm gear reduction box 9 in the retainer driving assembly is further identified by reading detection signals sent by the infrared opposite-shooting photoelectric sensor 8.

Further, the retainer driving assembly consists of a push-pull electromagnet 15, a rigid coupling 14, a connecting rod 13, a pin 12 and a strip-shaped groove plate 16;

The push-pull rod at the output end of the push-pull electromagnet 15 is rigidly connected with one end of the connecting rod 13 through the rigid coupling 14, the push-pull electromagnet 15 is fixed on the gearbox housing, the pin 12 is fixedly arranged in a counter bore at the other end of the connecting rod 13, the strip-shaped groove plate 16 is fixedly arranged on the outer edge of the end face of the retainer 4, the length direction of the strip-shaped groove plate 16 is radially arranged along the end face of the retainer 4, and the pin 12 is in matched connection with the strip-shaped groove on the strip-shaped groove plate 16.

Further, the control assembly comprises a controller, and a control signal output end of the controller is connected with a control signal receiving end of the push-pull electromagnet 15.

The control method of the bidirectional controllable overrunning clutch comprises a forward unidirectional overrunning mode control method and a reverse unidirectional overrunning mode control method, and the specific control process is as follows:

the specific control process of the forward unidirectional overrunning mode control method is as follows:

In the bidirectional controllable overrun clutch, after the controller receives a forward unidirectional overrun command sent by a TCU (thyristor control unit) of a vehicle, the controller sends a control instruction to a driving motor 10, the driving motor 10 is controlled to drive a worm gear reduction box 9 to move forward, a driving gear 6 drives a driven gear 11 to rotate under the driving of an output shaft of the worm gear reduction box 9, a retainer 4 synchronously rotates under the driving of the driven gear 11, the retainer 4 drives a roller 3 to move towards a reverse operation locking end of a fusiform space along the circumferential direction in a corresponding fusiform space between an inner ring 1 and an outer ring 2, when the worm gear reduction box 9 output shaft rotates, a shading disc 5 gradually moves from a start shading infrared opposite-emission photoelectric sensor 8 to an infrared opposite-emission photoelectric sensor 8 to move out of a shading disc 5 area, the roller 3 is driven by the retainer 4 to move to a reverse operation locking end of the fusiform space, the controller receives a detection signal sent by the infrared opposite-emission photoelectric sensor 8, and controls the driving motor 10 to stop working, at the moment, the outer ring 2 is fixed, and under the wedge force of the roller 3, the roller 1 is locked relative to the inner ring 2 along the reverse direction relative to the opposite direction 1, and the forward direction overrun is free to the outer ring 2;

the specific control process of the reverse unidirectional overrunning mode control method is as follows:

In the bidirectional controllable overrun clutch, after the controller receives a reverse unidirectional overrun command sent by a vehicle TCU, the controller sends a control command to the driving motor 10 to control the driving motor 10 to drive the worm gear reduction box 9 to reversely run, under the drive of the output shaft of the worm gear reduction box 9, the driving gear 6 drives the driven gear 11 to rotate, then the retainer 4 synchronously rotates under the drive of the driven gear 11, the retainer 4 drives the roller 3 to move towards the forward running locking end of the fusiform space along the circumferential direction in the corresponding fusiform space between the inner ring 1 and the outer ring 2, when the worm gear reduction box 9 outputs a pintle rotation process, the shading disc 5 gradually moves from the start of shading the infrared opposite-reflection photoelectric sensor 8 to the forward running locking end of the fusiform space when the infrared opposite-reflection photoelectric sensor 8 moves out of the shading disc 5, the controller receives a detection signal sent by the infrared opposite-reflection photoelectric sensor 8 and controls the driving motor 10 to stop working, at the moment, the outer ring 2 is fixed, and under the wedge force of the roller 3, the inner ring 1 is locked relative to the inner ring 2 in the reverse direction, and the reverse free overrun mode is realized relative to the inner ring 2.

A method of controlling a bi-directional controllable overrunning clutch, the method comprising: the control method of the forward unidirectional overrunning mode and the control method of the reverse unidirectional overrunning mode comprise the following specific control processes:

In the bidirectional controllable overrunning clutch, when the push-pull electromagnet 15 is not electrified, under the action of a spring in the push-pull electromagnet 15, the push-pull rod at the output end of the push-pull electromagnet 15 is contracted inwards in the axial direction, the pulling force of the push-pull rod of the push-pull electromagnet 15 is sequentially transmitted to the strip-shaped groove plate 16 through the rigid coupler 14, the connecting rod 13 and the pin 12, the strip-shaped groove plate 16 rotates reversely in the axial direction of the retainer 4 under the pulling force action of the connecting rod 13 and the pin 12, the retainer 4 rotates synchronously under the driving of the strip-shaped groove plate 16 and drives the roller 3 to move in the corresponding shuttle-shaped space between the inner ring 1 and the outer ring 2 in the circumferential direction to the reverse operation locking end of the shuttle-shaped space, when the push-pull rod of the push-pull electromagnet 15 is contracted to the shortest, the roller 3 is shifted down to the reverse operation locking end of the shuttle-shaped space by the shifting frame of the retainer 4, at this time, the outer ring 2 is fixed, the inner ring 1 is locked relatively in the reverse direction relative to the outer ring 2 under the action of the wedging force of the roller 3, and the inner ring 1 rotates freely in the forward unidirectional overrunning mode relative to the outer ring 2 in the forward direction;

In the bidirectional controllable overrun clutch, after receiving a reverse unidirectional overrun command sent by a vehicle TCU, the controller sends a control instruction to the push-pull electromagnet 15, so as to control the push-pull rod at the output end of the push-pull electromagnet 15 to extend outwards along the axial direction, the thrust of the push-pull rod of the push-pull electromagnet 15 is sequentially transmitted to the strip-shaped groove plate 16 through the rigid coupling 14, the connecting rod 13 and the pin 12, the strip-shaped groove plate 16 rotates forwards along the axial direction of the retainer 4 under the action of the pulling force of the connecting rod 13 and the pin 12, the retainer 4 rotates synchronously under the action of the strip-shaped groove plate 16 and drives the roller 3 to move towards the forward running locking end of the fusiform space along the circumferential direction in the corresponding fusiform space between the inner ring 1 and the outer ring 2, when the push-pull rod of the push-pull electromagnet 15 extends to the longest, the roller 3 moves to the forward running locking end of the fusiform space under the action of the retainer 4, at this time, the outer ring 2 is fixed, the inner ring 1 is locked relatively to the outer ring 2 along the forward direction under the action of the wedging force of the roller 3, and the inner ring 1 rotates freely along the reverse direction relative to the outer ring 2, so that the reverse unidirectional overrun mode is realized.

Compared with the prior art, the invention has the beneficial effects that:

1. the bidirectional controllable overrunning clutch reduces the complexity of axial parts of the gearbox, shortens the axial size of the gearbox, has simple structure, fewer parts and low cost, and is easy to arrange and maintain.

2. The bidirectional controllable overrunning clutch is provided with the infrared opposite-irradiation photoelectric sensor for detecting the position of the actuating mechanism, so that effective fault diagnosis can be carried out, and the reliability of the system is improved.

3. According to the bidirectional controllable overrunning clutch, the retainer driving assembly is independent from the whole structure, so that the structure modularization is realized, and further, the same executing assembly can be matched with different driving assemblies or the same driving assembly can drive different executing assemblies, and the design of the bidirectional controllable clutch with different types and different specifications is facilitated.

4. The invention relates to a part used for a driving component part of a bidirectional controllable overrunning clutch, which comprises the following components: the pinion, the flexible coupling, the worm gear reduction box, the driving motor and the like are used for deleting original parts and parts on the basis of the existing electric vehicle unpowered interruption gear shifting gearbox, and corresponding parts are additionally arranged.

5. In the bidirectional controllable overrunning clutch, the gear driving assembly adopts the flexible coupling, so that the driving motor needs to overcome the resistance of the spring on the flexible coupling to store energy in the process of rotating the retainer around the shaft, and the part of energy can compensate the clearance in each transmission part after the motor stops outputting so as to ensure the reliable joint of the rollers between the inner ring and the outer ring.

Drawings

FIG. 1 is an isometric view of the overall structure of the two-way controllable overrunning clutch according to embodiment 1 of the present invention;

FIG. 2 is a schematic diagram of an exploded view of a cage driving assembly (not including a driven gear) of the bi-directional controllable overrunning clutch according to embodiment 1 of the present invention;

FIG. 3 is a schematic diagram showing an exploded view of a roller actuator assembly of the bi-directional controllable overrunning clutch according to embodiment 1 of the present invention;

FIG. 4 is an isometric view of the overall structure of the two-way controllable overrunning clutch according to embodiment 2 of the present invention;

FIG. 5 is a schematic view showing an exploded structure of a cage driving assembly (excluding a strip-shaped groove plate) of the bi-directional controllable overrunning clutch according to embodiment 2 of the present invention;

FIG. 6 is a schematic diagram showing an exploded view of a roller actuator assembly of the bi-directional controllable overrunning clutch according to embodiment 2 of the present invention;

FIG. 7 is a schematic view of a forward one-way overrunning condition of a roller actuator assembly in a bi-directional controllable overrunning clutch according to the present invention;

FIG. 8 is a schematic diagram of a reverse one-way overrunning condition of a roller actuator assembly in a two-way controllable overrunning clutch according to the present invention;

FIG. 9a is a schematic view showing a rotation state of the shutter disk 5 of the bi-directional overrunning clutch according to embodiment 1 of the present invention;

FIG. 9b is a schematic diagram showing a rotating state of the shutter disk 5 of the bi-directional overrunning clutch according to embodiment 1 of the present invention;

FIG. 9c is a schematic diagram showing the rotation state of the shutter disk 5 of the bi-directional overrunning clutch according to embodiment 1 of the present invention;

FIG. 9d is a schematic diagram showing the rotation state of the shutter disk 5 of the bi-directional overrunning clutch according to embodiment 1 of the present invention;

fig. 9e is a schematic diagram showing the rotating state of the shutter disk 5 of the bi-directional overrunning clutch according to embodiment 1 of the present invention.

In the figure:

1-inner ring, 2-outer ring, 3-roller and 4-retainer,

5-CD-shading disc, 6-driving gear, 7-flexible coupling, 8-infrared correlation photoelectric sensor,

9-Worm gear reduction box, 10-driving motor, 11-driven gear, 12-pin,

13-Connecting rod, 14-rigid coupling, 15-push-pull electromagnet and 16-bar-shaped groove plate.

Detailed Description

For further explanation of the technical scheme of the invention, the specific embodiments of the invention are as follows in combination with the accompanying drawings of the specification:

example 1

The embodiment discloses a bidirectional controllable overrunning clutch, which consists of a retainer driving component, a roller executing component and a control component.

As shown in fig. 1 and 2, the cage driving assembly is composed of a driving motor 10, a worm gear reduction box 9, a flexible coupling 7, a driving gear 6 and a driven gear 11. The driving motor 10 is used as a power source of the retainer driving assembly to output rotary driving force outwards, an output shaft of a power output end of the driving motor is fixedly connected with an input shaft of the worm gear reduction box 9 in a coaxial mode, an output shaft of the worm gear reduction box 9 is connected with a gear shaft of the driving gear 6 in a coaxial mode through the flexible coupling 7, and the worm gear reduction box 9 is fixed on a gearbox shell. The driving gear 6 is meshed with a driven gear fixed on the end face of the holding frame 4.

In the cage driving assembly, the driving motor 10 provides energy through a vehicle-mounted power supply, a control signal input end of the driving motor 10 is connected with a control signal output end of a controller in the control assembly, and the controller controls the working voltage of the driving motor 10 to further control the output torque of the driving motor 10; the output shaft of the driving motor 10 drives the input shaft of the worm gear reduction box 9 to rotate at a high speed, and power is transmitted through the worm gear reduction box 9 and then is output from the output shaft of the worm gear reduction box 9 in a low-rotation-speed mode.

In the cage driving assembly, the flexible coupling 7 is adopted to connect the worm gear reduction box 9 and the driving gear 6, so that the driving motor 10 needs to overcome the spring resistance on the flexible coupling 7 to store energy in the rotating process of the driving gear 6, and the part of energy can compensate the clearance in each transmission part after the driving motor 10 stops power output, thereby ensuring that the roller 3 is reliably attached between the inner ring 1 and the outer ring 2 in the roller executing assembly.

As shown in fig. 1 and 3, the roller actuating assembly is composed of an inner race 1, an outer race 2, rollers 3 and a cage 4. The outer wall of the inner ring 1 is a smooth continuous cylindrical surface, seven arc grooves are uniformly distributed on the inner wall of the outer ring 2 along the radial direction, the outer ring 2 is coaxially sleeved on the outer side of the inner ring 1, seven narrow-end middle-wide fusiform spaces are formed between the outer wall of the inner ring 1 and the inner wall of the outer ring 2, wherein the narrow two ends refer to smaller radial distances between the outer wall of the inner ring 1 and the inner wall of the outer ring 2 at the positions of the two ends of the fusiform spaces along the circumferential direction, so that when the roller 3 moves to the two ends of the fusiform spaces, the inner ring 1 and the outer ring 2 are wedged and locked in one direction along the circumferential direction, and the one-way transmission of power between the inner ring 1 and the outer ring 2 is realized, wherein one narrow end is a forward running locking end, and the other narrow end is a reverse running locking end; the term "intermediate width" means that the radial distance between the outer wall of the inner ring 1 and the inner wall of the outer ring 2 at the middle position of the spindle-shaped space along the circumferential direction is large, so that when the roller 3 moves to the middle of the spindle-shaped space, the inner ring 1 and the outer ring 2 can rotate relatively freely without power transmission. The retainer 4 is of a cylindrical frame structure, seven groups of shifting frames are arranged on the circumferential direction of the retainer 4 perpendicular to the end face of the retainer 4, the retainer 4 is sleeved between the inner ring 1 and the outer ring 2, and the shifting frames of the retainer 4 correspond to shuttle-shaped spaces formed between the outer wall of the inner ring 1 and the inner wall of the outer ring 2 one by one. The rollers 3 are arranged in one-to-one correspondence with the shifting frames of the retainer 4, the rollers 3 are axially arranged in the shifting frames of the retainer 4 in parallel with the axial direction of the retainer 4, and the rollers 3 move along the circumferential direction in the corresponding spindle-shaped space between the inner ring 1 and the outer ring 2 under the driving of the rotation of the retainer 4.

As shown in fig. 7, in the roller executing assembly, the position of the roller 3 is at the left end of the fusiform space between the inner ring 1 and the outer ring 2, namely, the reverse running locking end, when the outer ring 2 is relatively fixed, the inner ring 1 rotates clockwise, the roller 3 moves to the middle wider position under the action of friction force, and at the moment, the inner ring 1 and the outer ring 2 can rotate relatively freely, namely, the inner ring 1 can rotate freely in the clockwise direction relative to the outer ring 2; when the outer ring 2 is relatively fixed, the roller 3 will continue to move towards the left end of the spindle-shaped space shown in the figure under the action of friction force when the outer ring 2 is relatively fixed, the roller 3 will wedge between the inner ring 1 and the outer ring 2, the inner ring 1 and the outer ring 2 are locked, and the inner ring 1 cannot rotate in the anticlockwise direction relative to the outer ring 2, so that the roller executing assembly is in a forward unidirectional overrunning state at this time, namely, the bidirectional controllable overrunning clutch is in a forward unidirectional overrunning mode.

As shown in fig. 8, in the roller executing assembly, the position of the roller 3 is at the right end of the fusiform space between the inner ring 1 and the outer ring 2, namely, the forward running locking end, when the outer ring 2 is relatively fixed, the inner ring 1 rotates anticlockwise, the roller 3 moves towards the middle wider position under the action of friction force, and at the moment, the inner ring 1 and the outer ring 2 can rotate relatively freely, namely, the inner ring 1 can rotate freely anticlockwise relative to the outer ring 2; when the outer ring 2 is relatively fixed, the inner ring 1 rotates clockwise, the roller 3 will continue to move towards the right end of the fusiform space shown in the figure under the action of friction force, at this time, the roller 3 will wedge between the inner ring 1 and the outer ring 2, the inner ring 1 and the outer ring 2 are locked, at this time, the inner ring 1 cannot rotate clockwise relative to the outer ring 2, so at this time, the roller executing assembly is in a reverse one-way overrunning state, namely, the bidirectional controllable overrunning clutch is in a reverse one-way overrunning mode.

As shown in fig. 1, the driven gear 11 in the cage driving assembly is coaxially disposed with the end surface of the cage 4 in the roller executing assembly, in this embodiment 1, the driven gear 11 and the outer end surface of the cage 4 are of an integrally disposed structure, and the driven gear 11 and the cage 4 synchronously move, so that the cage 4 synchronously rotates with the driven gear 11 under the driving of the driving motor 10, and the roller 3 is moved in the corresponding spindle space between the inner ring 1 and the outer ring 2 along the circumferential direction by the pulling frame.

As shown in fig. 1 and 2, the control assembly is composed of a controller (not shown), a shading disc 5 and an infrared correlation photoelectric sensor 8. The control signal output end of the controller is connected with the control signal receiving end of the driving motor 10, and the signal output end of the infrared correlation photoelectric sensor 8 is connected with the signal input end of the controller. The infrared opposite-emission photoelectric sensor 8 is arranged on the outer surface of the shell at one side of the output end of the worm gear reduction box 9. The shading disc 5 is of an integrated structure formed by a middle disc and a shading outer edge, a D-shaped hole is formed in the center of the middle disc of the shading disc 5, the shading outer edge of the shading disc 5 is in a fan shape when the infrared transmitting end and the infrared receiving end of the infrared opposite-transmitting photoelectric sensor 8 just completely enter the shading outer edge area of the shading disc 5 (as shown in figure 9B), the shading outer edge of the shading disc 5 is coaxially arranged on the circumference of the center disc, the shading disc 5 and the infrared opposite-transmitting photoelectric sensor 8 are installed in a matched mode, when the shading disc 5 is driven by the output shaft of the worm reduction gearbox 9 to rotate along the axial direction, as shown in figures 9a to 9e, the shading outer edge of the shading disc 5 rotates along the axial direction, the shading outer edge of the shading disc 5 gradually moves to a position between the infrared transmitting end and the infrared receiving end of the infrared opposite-transmitting photoelectric sensor 8, when the infrared transmitting end and the infrared receiving end of the infrared opposite-transmitting photoelectric sensor 8 just completely enter the shading outer edge area of the shading disc 5 (as shown in figure 9B), the infrared opposite-transmitting photoelectric sensor 8 continuously transmits a detection signal to the infrared transmitting end of the infrared opposite-transmitting photoelectric sensor 8 along the axial direction along with the axial direction of the shading end of the shading disc 5, and the infrared receiving end of the infrared opposite-transmitting photoelectric sensor 8 continuously moves along the infrared transmitting the infrared signal along the axial direction along the direction when the infrared transmitting end of the infrared receiving end is continuously shown in figure 8, the controller can identify the rotation angle change information of the output shaft of the worm gear reduction box 9 by reading the detection signal sent by the infrared correlation photoelectric sensor 8, so as to judge whether the retainer 4 is driven by the retainer driving assembly to stir the roller 3 to an accurate wedging position, ensure the reliable attachment of the roller 3 between the inner ring 1 and the outer ring 2, and finally judge the locking state of the bidirectional overrunning clutch. When the infrared correlation photoelectric sensor 8 transmits a detection signal A to a detection signal B, the roller 3 is just driven by the retainer 4 from one end of the corresponding fusiform space to the other end of the fusiform space. The fan-shaped angle of the shading outer edge of the shading disc 5 is determined according to the diameter of the shading disc 5, the transmission ratio of the driving gear 6 and the driven gear 11 and the angle occupied by the fusiform space between the inner ring 1 and the outer ring 2.

According to the above-mentioned structure composition and connection mode of the bidirectional controllable overrunning clutch, this embodiment 1 also discloses a control method of the bidirectional controllable overrunning clutch, which includes: the control method of the forward unidirectional overrunning mode and the control method of the reverse unidirectional overrunning mode comprise the following specific control processes:

In the bidirectional controllable overrunning clutch shown in fig. 1, after the controller receives a forward unidirectional overrunning command sent by a TCU (automatic gearbox control unit) of a vehicle, the controller sends a control command to a driving motor 10 to control the driving motor 10 to act, so that under the driving of the driving motor 10, an output shaft of a worm reduction gearbox 9 rotates clockwise (the observation direction at the moment is the overlooking direction of fig. 1), under the driving of an output shaft of the worm reduction gearbox 9, a driving gear 6 drives a driven gear 11 to rotate anticlockwise, then a retainer 4 rotates anticlockwise under the driving of the driven gear 11, a shifting frame of the retainer 4 drives a roller 3 to move anticlockwise in a reverse running locking end of the spindle space along the circumferential direction in a corresponding spindle space between an inner ring 1 and an outer ring 2, during the clockwise rotation of an output shaft of the worm reduction gearbox 9, as shown in fig. 9a-9e, a shading outer edge of the shading disc 5 rotates clockwise, gradually moves between an infrared light emitting end and an infrared light receiving end of the infrared light counter-emitting photoelectric sensor 8 from beginning to enter, gradually moves to a position between the infrared light emitting end and the infrared light receiving end of the infrared light-emitting photoelectric sensor 8, and stops the infrared light-emitting end of the infrared photoelectric sensor 8 when the infrared light-emitting photoelectric sensor is stopped from the outer ring 2, the opposite running locking end of the roller 3 is controlled to move towards the opposite direction opposite to the inner ring 2, and the opposite running locking end of the infrared photoelectric sensor is completely opposite to the infrared sensor 8, when the infrared light-emitting end of the infrared photoelectric sensor 8 is controlled to move towards the infrared sensor 8, and the opposite the infrared sensor is completely opposite to the infrared sensor 1, and the outer ring is completely moves towards the opposite side of the infrared receiving end, and the infrared sensor is completely, as shown in the infrared receiving end, and the infrared light receiving end is opposite side of the infrared light receiving end, and the infrared light receiving end 8, and the inner ring 1 rotates freely in the clockwise direction relative to the outer ring 2, so that a forward unidirectional overrunning mode is realized.

In the bidirectional controllable overrunning clutch shown in fig. 1, after receiving a reverse unidirectional overrunning command sent by a TCU (automatic gearbox control unit) of a vehicle, the controller sends a control command to a driving motor 10 to control the driving motor 10 to act, so that an output shaft of a worm reduction gearbox 9 rotates anticlockwise (the observation direction at the moment is the overlooking direction of fig. 1) under the driving of the driving motor 10, a driving gear 6 drives a driven gear 11 to rotate clockwise under the driving of an output shaft of the worm reduction gearbox 9, a retainer 4 rotates clockwise under the driving of the driven gear 11, a poking frame of the retainer 4 drives a roller 3 to move clockwise in a forward running locking end of the spindle space along the circumferential direction in a corresponding spindle space between an inner ring 1 and an outer ring 2, during the anticlockwise rotation of an output shaft of the worm reduction gearbox 9, as shown in fig. 9a-9e, a shading outer edge of a shading disc 5 gradually moves between an infrared light emitting end of an infrared light counter-photoelectric sensor 8 and an infrared light receiving end from beginning to a position between the infrared light emitting end of the infrared counter-photoelectric sensor 8 and the infrared light receiving end, when the infrared light sensor 5 is stopped from the infrared light emitting end of the infrared counter-photoelectric sensor 8, the poking disc 5 moves clockwise in the opposite direction to the spindle space between the inner ring 1 and the spindle space when the spindle space is stopped relative to the spindle space 2, the roller 3 is controlled to rotate clockwise, and the spindle 3 is locked to the spindle space is controlled to rotate clockwise when the infrared sensor 8 is stopped relative to the infrared sensor 8, as shown in the inner ring 2, and the outer ring is kept in the opposite direction, and the opposite direction is kept under the opposite direction 1, and the opposite to the infrared sensor 2 is shown in the infrared sensor 8, and the inner ring 1 freely rotates in the anticlockwise direction relative to the outer ring 2, so that a reverse unidirectional overrunning mode is realized.

Example 2

As shown in fig. 4 and 5, the cage driving assembly is composed of a push-pull electromagnet 15, a rigid coupling 14, a connecting rod 13, a pin 12 and a bar-shaped slot plate 16. The push-pull electromagnet 15 is used as a power source of the retainer driving assembly to output linear push-pull driving force outwards, a push-pull rod at the output end of the push-pull electromagnet 15 is rigidly connected with one end of the connecting rod 13 through the rigid coupler 14, the push-pull electromagnet 15 is fixed on the gearbox housing, a counter bore is formed in the other end of the connecting rod 13, the pin 12 is fixedly mounted in the counter bore at the end part of the connecting rod 13 through interference fit, the strip-shaped groove plate 16 is fixedly mounted on the outer edge of the end face of the retainer 4, the length direction of the strip-shaped groove plate 16 is radially arranged along the end face of the retainer 4, the pin 12 is connected with the strip-shaped groove on the strip-shaped groove plate 16 in a matched mode, and under the push-pull driving of the push-pull electromagnet 15, the connecting rod 13 drives the pin 12 to move along the strip-shaped groove of the strip-shaped groove plate 16 so as to drive the retainer 4 to rotate axially.

In the cage driving assembly, the push-pull electromagnet 15 provides energy through a vehicle-mounted power supply, a control signal input end of the push-pull electromagnet 15 is connected with a control signal output end of a controller in the control assembly, and the controller controls the push-pull force output by the push-pull electromagnet 15 along the axial direction by controlling the working voltage of the push-pull electromagnet 15; when the push-pull rod at the power output end of the push-pull electromagnet 15 moves along a straight line, power is transmitted to the retainer 4 through the rigid coupler 14, the connecting rod 13, the pin 12 and the strip-shaped groove plate 16 in sequence, so that the retainer 4 is controlled to rotate along the axial direction of the retainer.

As shown in fig. 4 and 6, the roller actuating assembly is composed of an inner race 1, an outer race 2, rollers 3 and a cage 4. The outer wall of the inner ring 1 is a smooth continuous cylindrical surface, seven arc grooves are uniformly distributed on the inner wall of the outer ring 2 along the radial direction, the outer ring 2 is coaxially sleeved on the outer side of the inner ring 1, seven narrow-end middle-wide fusiform spaces are formed between the outer wall of the inner ring 1 and the inner wall of the outer ring 2, wherein the narrow two ends refer to smaller radial distances between the outer wall of the inner ring 1 and the inner wall of the outer ring 2 at the positions of the two ends of the fusiform spaces along the circumferential direction, so that when the roller 3 moves to the two ends of the fusiform spaces, the inner ring 1 and the outer ring 2 are wedged and locked in one direction along the circumferential direction, and the one-way transmission of power between the inner ring 1 and the outer ring 2 is realized, wherein one narrow end is a forward running locking end, and the other narrow end is a reverse running locking end; the term "intermediate width" means that the radial distance between the outer wall of the inner ring 1 and the inner wall of the outer ring 2 at the middle position of the spindle-shaped space along the circumferential direction is large, so that when the roller 3 moves to the middle of the spindle-shaped space, the inner ring 1 and the outer ring 2 can rotate relatively freely without power transmission. The retainer 4 is of a cylindrical frame structure, seven groups of shifting frames are arranged on the circumferential direction of the retainer 4 perpendicular to the end face of the retainer 4, the retainer 4 is sleeved between the inner ring 1 and the outer ring 2, and the shifting frames of the retainer 4 correspond to shuttle-shaped spaces formed between the outer wall of the inner ring 1 and the inner wall of the outer ring 2 one by one. The rollers 3 are arranged in one-to-one correspondence with the shifting frames of the retainer 4, the rollers 3 are axially arranged in the shifting frames of the retainer 4 in parallel with the axial direction of the retainer 4, and the rollers 3 move along the circumferential direction in the corresponding spindle-shaped space between the inner ring 1 and the outer ring 2 under the driving of the rotation of the retainer 4.

As shown in fig. 3, the strip-shaped groove plate 16 in the cage driving assembly is disposed on the outer edge of the end face of the cage 4 in the roller executing assembly, and the length direction of the strip-shaped groove plate 16 is radially disposed along the end face of the cage 4, in this embodiment 2, the strip-shaped groove plate 16 and the outer end face of the cage 4 are in an integrated structure, so that under the driving of the push-pull electromagnet 15, the connecting rod 13 drives the pin 12 to move along the strip-shaped groove of the strip-shaped groove plate 16 to drive the cage 4 to rotate along the axial direction, and the cage 4 rotates to stir the roller 3 to move along the circumferential direction in the corresponding shuttle-shaped space between the inner ring 1 and the outer ring 2 through the stirring frame.

The control assembly includes a controller (not shown). The control signal output end of the controller is connected with the control signal receiving end of the push-pull electromagnet 15, the push-pull electromagnet 15 realizes the telescopic action control of the push-pull rod at the output end of the push-pull electromagnet through the controller, and further realizes the control of the relative motion between the roller 3 and the inner ring 1 and the outer ring 2 in the roller executing assembly, and when the roller 3 moves to a designated position, small current can be continuously introduced into the push-pull electromagnet 15 through the controller so as to eliminate the gap between all transmission parts, so that the roller 3 is reliably attached between the inner ring 1 and the outer ring 2 in the roller executing assembly.

According to the above-mentioned structure composition and connection mode of the bidirectional controllable overrunning clutch, this embodiment 2 also discloses a control method of the bidirectional controllable overrunning clutch, which includes: the control method of the forward unidirectional overrunning mode and the control method of the reverse unidirectional overrunning mode comprise the following specific control processes:

As shown in fig. 4, in the bidirectional controllable overrunning clutch, when the push-pull electromagnet 15 is not electrified, under the action of the spring inside the push-pull electromagnet 15, the push-pull rod at the output end of the push-pull electromagnet 15 is in an initial state of contracting inwards along the axial direction, the pulling force of the push-pull rod of the push-pull electromagnet 15 is sequentially transmitted to the bar-shaped grooved plate 16 through the rigid coupling 14, the connecting rod 13 and the pin 12, the bar-shaped grooved plate 16 rotates anticlockwise along the axial direction of the retainer 4 under the pulling force of the connecting rod 13 and the pin 12 (the observation direction at the moment is the overlooking direction of fig. 4), the retainer 4 rotates anticlockwise under the driving of the bar-shaped grooved plate 16 by a certain angle, the shifting frame of the retainer 4 drives the roller 3 to move anticlockwise along the circumferential direction in the spindle-shaped space corresponding to the opposite operation locking end of the spindle-shaped space between the inner ring 1 and the outer ring 2, when the rod of the push-pull electromagnet 15 contracts to the shortest time, as shown in fig. 7, the roller 3 moves down to the opposite operation locking end of the spindle-shaped space of the outer ring 1 is fixed, the wedge 2 is locked clockwise relative to the outer ring 1 under the action of the wedge 3, and the clockwise rotation relative to the spindle 2 is locked clockwise along the direction relative to the inner ring 2.

As shown in fig. 4, in the bidirectional controllable overrun clutch, after the controller receives a reverse unidirectional overrun command sent by a TCU (automatic gearbox control unit) of a vehicle, the controller sends a control command to the push-pull electromagnet 15, so as to control the push-pull rod at the output end of the push-pull electromagnet 15 to be stretched outwards in the axial direction, the thrust of the push-pull rod of the push-pull electromagnet 15 is sequentially transmitted to the strip-shaped groove plate 16 through the rigid coupling 14, the connecting rod 13 and the pin 12, the strip-shaped groove plate 16 rotates clockwise along the axial direction of the retainer 4 (the observation direction at the moment is the overlooking direction of fig. 4) under the pulling force of the connecting rod 13 and the pin 12, the retainer 4 rotates clockwise under the driving of the strip-shaped groove plate 16 by a certain angle, the shifting frame of the retainer 4 drives the roller 3 to move clockwise along the circumferential direction in the spindle-shaped space between the inner ring 1 and the outer ring 2, and when the rod of the push-pull electromagnet 15 is stretched to the longest, the roller 3 moves to the spindle-shaped space forward running locking end in the clockwise direction, as shown in fig. 8, the shifting the pulling roller 3 moves clockwise along the spindle-shaped space under the pulling direction of the pulling frame of the retainer 4, and the pulling roller 3 is fixed relative to the spindle-shaped space in the reverse direction, and the reverse direction is locked relative to the inner ring 1, and the outer ring 2 is locked clockwise, and the reverse clockwise direction is locked relative to the inner ring 1 and overtaking mode.

Claims

1. A control method of a bidirectional controllable overrunning clutch is characterized in that: the bidirectional controllable overrunning clutch comprises a retainer driving assembly, a roller executing assembly and a control assembly;

The control tail end of the retainer driving assembly is fixedly connected with the retainer (4) of the roller executing assembly in a coaxial way;

The roller executing assembly consists of an inner ring (1), an outer ring (2), rollers (3) and a retainer (4), wherein the outer ring (2) is coaxially sleeved on the outer side of the inner ring (1), a plurality of shuttle-shaped spaces with narrow two ends and wide middle are formed between the outer wall of the inner ring (1) and the inner wall of the outer ring (2), the retainer (4) is of a cylindrical frame structure, a plurality of poking frames are arranged on the end face of the retainer (4) in the circumferential direction perpendicular to the end face of the retainer, the retainer (4) is sleeved between the inner ring (1) and the outer ring (2), the poking frames of the retainer (4) are in one-to-one correspondence with the shuttle-shaped spaces formed between the outer wall of the inner ring (1) and the inner wall of the outer ring (2), the rollers (3) are correspondingly installed in the poking frames of the retainer (4), and the rollers (3) move in the corresponding shuttle-shaped spaces between the inner ring (1) and the outer ring (2) in the circumferential direction under the rotation driving of the retainer (4);

The control assembly is in control connection with the retainer driving assembly so as to control the retainer driving assembly to drive the retainer (4) to axially rotate, wherein:

when the retainer driving assembly consists of a driving motor (10), a worm gear reduction box (9), a flexible coupling (7), a driving gear (6) and a driven gear (11);

An output shaft of a driving motor (10) is coaxially and fixedly connected with an input shaft of a worm gear reduction box (9), an output shaft of the worm gear reduction box (9) is coaxially connected with a gear shaft of a driving gear (6) through a flexible coupling (7), the worm gear reduction box (9) is fixed on a gearbox shell, and the driving gear (6) is meshed with a driven gear (11) coaxially fixed on the end face of a retainer (4);

The control component consists of a controller, a shading disc (5) and an infrared opposite-irradiation photoelectric sensor (8);

the control signal output end of the controller is connected with the control signal input end of the driving motor (10);

The infrared opposite-shooting photoelectric sensor (8) is arranged on the outer surface of a shell at one side of the output end of the worm gear reduction box (9), the shading disc (5) is coaxially arranged on the output shaft of the worm gear reduction box (9), the shading disc (5) is matched with the infrared opposite-shooting photoelectric sensor (8), when the shading disc (5) is driven by the output shaft of the worm gear reduction box (9) to rotate along the axial direction, the infrared opposite-shooting photoelectric sensor (8) is completely shielded from the shading disc (5) so as to prevent the infrared opposite-shooting photoelectric sensor (8) from receiving and transmitting infrared light signals, the infrared opposite-shooting photoelectric sensor (8) moves out of the coverage area of the shading disc (5) so as to restore the process of receiving and transmitting infrared light signals, the retainer (4) drives the roller (3) to be driven to the other end of the fusiform space from one end of the corresponding fusiform space under the driving of the retainer, the signal output end of the infrared opposite-shooting photoelectric sensor (8) is connected with the signal input end of the controller, and the detection signal sent by the infrared opposite-shooting photoelectric sensor (8) is read so as to further identify the condition of the rotation angle of the worm gear reduction box (9) in the retainer driving assembly, the method comprises the following positive-direction and the reverse-direction control mode, and the reverse-direction control method comprises the following method of the reverse-direction control mode, and the reverse-direction control method, and the reverse-direction control mode, and the following:

In the bidirectional controllable overrunning clutch, after receiving a forward unidirectional overrunning command sent by a TCU (thyristor control unit) of a vehicle, the controller sends a control command to a driving motor (10), the driving motor (10) is controlled to drive a worm gear reduction box (9) to move forward, under the drive of an output shaft of the worm gear reduction box (9), a driving gear (6) drives a driven gear (11) to rotate, then a retainer (4) synchronously rotates under the drive of the driven gear (11), the retainer (4) drives a roller (3) to move towards a reverse operation locking end of the fusiform space along the circumferential direction in a corresponding fusiform space between an inner ring (1) and an outer ring (2), in the rotating process of an output shaft of the worm gear reduction box (9), when a shading disc (5) gradually moves to an infrared correlation photoelectric sensor (8) from the beginning to be shading the shading area of the infrared correlation photoelectric sensor (8), the roller (3) moves to the reverse operation locking end of the fusiform space under the drive of the retainer (4), the controller synchronously rotates under the drive of the driven gear (4), the infrared correlation photoelectric sensor (8) is driven by the retainer (4) to send a detection signal, the roller (3) is controlled to stop along the opposite rotation direction of the inner ring (2) relative to the inner ring (2), the outer ring (2) is locked in the opposite direction, the reverse rotation direction of the inner ring (2) is opposite to the outer ring (2), realizing a forward unidirectional overrun mode;

In the bidirectional controllable overrunning clutch, after receiving a reverse unidirectional overrunning command sent by a TCU (thyristor control unit) of a vehicle, the controller sends a control command to a driving motor (10), the driving motor (10) is controlled to drive a worm gear reduction box (9) to reversely run, under the drive of an output shaft of the worm gear reduction box (9), a driving gear (6) drives a driven gear (11) to rotate, a retainer (4) synchronously rotates under the drive of the driven gear (11), the retainer (4) drives a roller (3) to move towards a forward running locking end of the fusiform space along the circumferential direction in a corresponding fusiform space between an inner ring (1) and an outer ring (2), in the rotation process of an output shaft needle of the worm gear reduction box (9), when a shading disc (5) gradually moves from a shading infrared opposite-irradiation photoelectric sensor (8) to the infrared opposite-irradiation photoelectric sensor (8) to move out of the shading area of the optical disc (5), the roller (3) is driven by the retainer (4) to synchronously rotate under the drive of the driven gear (11), the controller drives the infrared opposite-irradiation photoelectric sensor (8) to stop the detection signal sent by the roller (3) along the inner ring (1) and the opposite direction of the outer ring (2) relative to the rotating direction of the spindle (2), realizing a reverse unidirectional overrun mode;

When the retainer driving assembly consists of a push-pull electromagnet (15), a rigid coupler (14), a connecting rod (13), a pin (12) and a strip-shaped groove plate (16);

The push-pull rod at the output end of the push-pull electromagnet (15) is rigidly connected with one end of a connecting rod (13) through a rigid coupling (14), the push-pull electromagnet (15) is fixed on the gearbox shell, a pin (12) is fixedly arranged in a counter bore at the other end of the connecting rod (13), a strip-shaped groove plate (16) is fixedly arranged on the outer edge of the end face of a retainer (4), the length direction of a strip-shaped groove of the strip-shaped groove plate (16) is radially arranged along the end face of the retainer (4), and the pin (12) is connected with the strip-shaped groove on the strip-shaped groove plate (16) in a matching way;

The control assembly comprises a controller, and when the control signal output end of the controller is connected with the control signal receiving end of the push-pull electromagnet (15), the control method comprises the following steps: the control method of the forward unidirectional overrunning mode and the control method of the reverse unidirectional overrunning mode comprise the following specific control processes:

In the bidirectional controllable overrunning clutch, when the push-pull electromagnet (15) is not electrified, under the action of a spring in the push-pull electromagnet (15), a push-pull rod at the output end of the push-pull electromagnet (15) is contracted inwards along the axial direction, when the push-pull rod of the push-pull electromagnet (15) is contracted to the shortest time, the pull force of the push-pull rod is sequentially transmitted to a bar-shaped groove plate (16) through a rigid coupling (14), a connecting rod (13) and a pin (12), the bar-shaped groove plate (16) rotates reversely along the axial direction of a retainer (4) under the action of the pull force of the connecting rod (13) and the pin (12), the retainer (4) synchronously rotates under the drive of the bar-shaped groove plate (16) and drives a roller (3) to move towards a reverse running locking end of the shuttle-shaped space along the circumferential direction in a corresponding shuttle-shaped space between an inner ring (1) and an outer ring (2), and when the push-pull rod of the push-pull electromagnet (15) is contracted to the shortest time, the roller (3) moves downwards to the reverse running locking end of the shuttle-shaped space under the action of the retainer (4), so that the wedge force of the roller (3) is fixed along the reverse direction relative to the inner ring (1) and the reverse direction of the roller (2) is locked along the reverse direction relative to the reverse direction of the inner ring (1);

In the bidirectional controllable overrun clutch, after receiving a reverse unidirectional overrun command sent by a TCU (thyristor controlled unit) of a vehicle, the controller sends a control command to a push-pull electromagnet (15) to control a push-pull rod at the output end of the push-pull electromagnet (15) to extend outwards along the axial direction, the thrust of the push-pull rod of the push-pull electromagnet (15) is sequentially transmitted to a strip-shaped groove plate (16) through a rigid coupling (14), a connecting rod (13) and a pin (12), the strip-shaped groove plate (16) rotates forwards along the axial direction of a retainer (4) under the action of the pulling force of the connecting rod (13) and the pin (12), the retainer (4) synchronously rotates under the action of the strip-shaped groove plate (16) and drives a roller (3) to move towards the forward running locking end of the shuttle-shaped space along the circumferential direction in a corresponding shuttle-shaped space between an inner ring (1) and an outer ring (2), and when the rod of the push-pull electromagnet (15) extends to the longest, the roller (3) moves to the forward running locking end of the shuttle-shaped space under the action of the retainer (4), and the roller (3) is fixed in the reverse direction relative to the reverse direction of the inner ring (1) relative to the outer ring (2), so that the reverse direction of the roller (1) is locked relative to the inner ring (1).