CN114321208A

CN114321208A - Bidirectional controllable clutch, power assembly and automobile

Info

Publication number: CN114321208A
Application number: CN202110807562.7A
Authority: CN
Inventors: 唐正义; 王欢
Original assignee: Huawei Digital Power Technologies Co Ltd
Current assignee: Huawei Digital Power Technologies Co Ltd
Priority date: 2021-07-16
Filing date: 2021-07-16
Publication date: 2022-04-12
Anticipated expiration: 2041-07-16
Also published as: CN114321208B; CN117469314A

Abstract

A bi-directional controllable clutch, a power assembly and an automobile are provided, wherein an excitation assembly in the clutch is provided with an accommodating space; the inner ring and the outer ring are arranged in the accommodating space, the outer ring is sleeved outside the inner ring, and a retainer is arranged between the outer ring and the inner ring; along the circumferential direction, the retainer is provided with a first mounting hole, and a first rolling piece is mounted in the first mounting hole; the inner side of the outer ring is provided with a limiting groove corresponding to the first mounting hole, and the limiting groove is provided with a second limiting section, a first limiting section and a third limiting section which are arranged along the circumferential direction; the distance between the first limiting section and the inner ring is larger than the diameter of the first rolling part, the distance between one end of the second limiting section, which faces the first limiting section, of the third limiting section and the inner ring is larger than the diameter of the first rolling part, and the distance between the other end of the second limiting section and the inner ring is smaller than the diameter of the first rolling part. The bidirectional controllable clutch can realize the power disengagement between the inner ring and the outer ring and also realize the bidirectional power transmission between the inner ring and the outer ring. Meanwhile, the clutch has the advantages of simple and small structure and convenience in control.

Description

Bidirectional controllable clutch, power assembly and automobile

Technical Field

The application relates to the technical field of auto parts, in particular to a bidirectional controllable clutch, a power assembly and an automobile.

Background

Four-wheel drive automobiles have become increasingly popular in recent years. Because all power of the four-wheel drive automobile is not required to be started on all road conditions, when only front driving force or rear driving force is required to be started, the motor which is not started has a back-dragging phenomenon, and extra energy loss is easily caused. Therefore, there is a need for timely power disconnection of electric drives that do not need to be powered, while the power disconnection of the vehicle is combined with the power via a clutch.

However, the one-way clutch can only transmit one-way power in the working process; the electromagnetic clutch not only has large power loss, but also has complex structural design and large volume.

Therefore, how to provide a bidirectional controllable clutch with a small structure is a problem to be solved urgently.

Disclosure of Invention

The application provides a bidirectional controllable clutch, a power assembly and an automobile, which are used for providing a bidirectional controllable overrunning clutch with a small structure.

In a first aspect, the present application provides a bi-directionally controllable clutch, which includes an excitation assembly, an inner ring and an outer ring, wherein the excitation assembly is used to fix a relative position with an external structural member, and both the inner ring and the outer ring are rotatably mounted in a receiving space of the excitation assembly around their axes. Specifically, the axial lead of the outer ring is coincident with the axial lead of the inner ring, and the outer ring is sleeved outside the inner ring. It is noted that, in the radial direction, there is a moving area between the inner ring and the outer ring, in which area the cage is mounted. Specifically, the retainer is provided with a plurality of first mounting holes distributed at intervals along the circumferential direction, and a first rolling member is mounted in each first mounting hole and can move relative to the first mounting holes along the radial direction. Illustratively, the plurality of first mounting holes are evenly spaced along the circumferential direction, and the first rolling members may be rollers or balls. The inner side of the outer ring is provided with a limiting groove corresponding to the first mounting hole, and the opening of each limiting groove faces to the movable area. It is worth noting that each limiting groove is provided with a first limiting section, a second limiting section and a third limiting section, and the second limiting section and the third limiting section are located on two sides of the first limiting section along the circumferential direction.

When using the two-way controllable clutch that this application provided, use spacing section of second, first spacing section and third along clockwise arrangement, and take the inner ring as the input as the example, the two-way controllable clutch that this application provided has following several kinds of operating condition at least.

When the excitation assembly does not work, the inner ring rotates anticlockwise relative to the outer ring, and each first rolling piece is abutted between the outer ring and the inner ring. Specifically, because the distance between the end of the second limiting section facing the first limiting section and the inner ring is greater than the diameter of the first rolling part, and the distance between the end of the second limiting section facing away from the first limiting section and the inner ring is less than the diameter of the first rolling part, the first rolling part can roll from the first limiting section into the second limiting section and directly abut against the position between the second limiting section corresponding to the first limiting section and the outer edge of the inner ring. At the moment, the inner ring and the outer ring realize self-locking through the first rolling piece, and the bidirectional controllable clutch provided by the application rotates anticlockwise and outputs torque from the outer ring.

When the excitation assembly does not work, the inner ring rotates clockwise relative to the outer ring, and each first rolling piece is abutted between the outer ring and the inner ring. Specifically, because the distance between the end of the third limiting section facing the first limiting section and the inner ring is greater than the diameter of the first rolling element, and the distance between the end of the third limiting section facing away from the first limiting section and the inner ring is less than the diameter of the first rolling element, the first rolling element can roll from the first limiting section into the third limiting section and directly abut against the position between the third limiting section corresponding to the third limiting section and the outer edge of the inner ring. At the moment, the inner ring and the outer ring realize self-locking through the first rolling piece, and the bidirectional controllable clutch provided by the application rotates clockwise and outputs torque from the outer ring.

It should be understood that the state of the self-locking output torque of the inner ring and the outer ring is a power combination state, and the state of the self-locking release of the inner ring and the outer ring is a power disconnection state.

When the power is required to be switched from power connection to power disconnection, the first rolling piece in the power connection state is positioned at the second limiting section or the third limiting section, so that the rotating speed of the inner ring needs to be controlled, and the inner ring can rotate properly. When the inner ring rotates to a proper position, the excitation assembly is switched on so as to magnetically attract the first rolling piece to be attached to the first limiting section. Because the distance between the first limiting section and the inner ring is larger than the diameter of the first rolling piece, the first rolling piece is not abutted to the outer surface of the inner ring any more at the moment, and the clutch is unlocked. It is worth noting that no power output is provided when the clutch output end rotates around the axis clockwise or anticlockwise. In other words, the clutch is in a freely rotating state.

When the power is required to be switched from power cut-off to power combination, the rotating speed of the inner ring is controlled to enable the rotating speed of the inner ring to be close to that of the outer ring, and the excitation assembly is cut off. At this time, the first rolling member is no longer attracted by the exciting assembly and is in a free state. The first rolling piece enters a locking position in a corresponding direction under the driving of the relative rotation of the inner ring and the outer ring.

The application provides a two-way controllable clutch can realize that the power of inner ring and outer loop is throw off, can realize the two-way transmission power between inner ring and outer loop again, and this clutch has simple structure, small and exquisite and the convenient advantage of control.

It will be appreciated that when the outer ring is the input, the direction of rotation of the outer ring in each operating condition is opposite to the direction of rotation of the inner ring.

In order to make first rolling member can be in first spacing section, spacing section of second and the spacing section of third between smooth and easy removal, can set up: along the circumferential direction, the first limiting section is in transitional connection with the second limiting section, and the first limiting section is in transitional connection with the third limiting section.

When specifically setting up the structure of first mounting hole, can set up: the size of the opening of one side, facing the outer ring, of each first mounting hole is larger than that of the opening of one side, facing the inner ring, of each first mounting hole. It is noted that the opening of each first mounting hole towards the side of the outer ring has a size larger than the diameter of the first rolling member, so that the first rolling member can move freely towards the outer ring under the action of the exciting assembly.

When the bidirectional controllable clutch provided by the application is specifically arranged, an adjusting structure can be arranged between the inner ring and the outer ring so as to improve the coaxiality of the inner ring and the outer ring. The adjusting structure is at least one of the following structures.

The structure I is as follows: the retainer is also provided with a second mounting hole, the second mounting hole and the first mounting hole are arranged along the extension direction of the shaft axis, and the size of the second mounting hole is larger than that of the first mounting hole; and a second rolling piece is arranged in the second mounting hole, and the second rolling piece is abutted between the inner ring and the outer ring along the radial direction.

The structure II is as follows: the holder includes first sub holder and the sub holder of second, and the sub holder of second arranges along the extending direction of axial lead with first sub holder, and along circumferential direction, the sub holder of second is fixed with first sub holder relative position, wherein:

the first sub-retainer is provided with a first mounting hole;

the second sub-retainer is provided with a second mounting hole, and the size of the second mounting hole is larger than that of the first mounting hole; and a second rolling piece is arranged in the second mounting hole, and the second rolling piece is abutted between the inner ring and the outer ring along the radial direction.

It will be appreciated that the second rolling elements, which are not only acting as rolling bodies but also for circumferential positioning, abut between the inner ring and the outer ring, so that a higher degree of accuracy of the coaxiality of the inner ring and the outer ring is obtained. Meanwhile, the second rolling member is not limited to a cylinder but may be a sphere.

When specifically setting up the two-way controllable clutch that this application provided, can also set up the baffle at the both ends of retainer to carry on spacingly along the extending direction of axial lead to inner ring and outer loop, perhaps, can set up inner ring and/or outer loop and have the shaft shoulder, make the shaft shoulder be used for carrying on spacingly along the extending direction of axial lead to inner ring and outer loop. The setting can be specifically carried out according to the requirements, and the detailed description is omitted here.

In a second aspect, the present application further provides a powertrain comprising an electric machine and any one of the bi-directionally controllable clutches as provided in the first aspect above, the electric machine being in driving connection with the inner or outer ring of the clutch.

In a third aspect, the present application also provides a vehicle equipped with any one of the power units as provided in the second aspect above.

Drawings

FIG. 1 is a schematic structural diagram of a bi-directionally controllable clutch provided in an embodiment of the present application;

FIG. 2 is a schematic structural view of a bi-directionally controllable clutch provided in accordance with an embodiment of the present application as viewed along direction b of FIG. 1;

FIG. 3 is a cross-sectional view of the structure of FIG. 1 at C-C, as viewed in direction b;

FIG. 4 is a partial cross-sectional view of the structure of FIG. 1 at D;

FIG. 5 is a schematic view of a further state of the structure of FIG. 1;

FIG. 6 is a cross-sectional view of the structure of FIG. 5 at C-C, as viewed in direction b;

FIG. 7 is a partial cross-sectional view of the structure of FIG. 5 at D;

FIG. 8 is a schematic diagram of a third state of the structure of FIG. 1;

FIG. 9 is a cross-sectional view of the structure of FIG. 8 at C-C, as viewed in direction b;

FIG. 10 is a partial cross-sectional view of the structure of FIG. 8 at D;

FIG. 11 is a schematic diagram of yet another arrangement of a bi-directionally controllable clutch as provided by an embodiment of the present application;

FIG. 12 is a schematic structural view of the clutch provided in FIG. 11, as viewed in direction b;

FIG. 13 is a cross-sectional view of the structure of FIG. 11 at C-C as viewed in direction b;

FIG. 14 is a schematic view of a further state of the structure of FIG. 11;

FIG. 15 is a cross-sectional view of the structure of FIG. 14 at C-C, as viewed in direction b;

FIG. 16 is a schematic view of a third state of the structure of FIG. 11;

FIG. 17 is a cross-sectional view of the structure of FIG. 16 at C-C as viewed in direction b;

fig. 18 is a schematic structural diagram of an automobile according to an embodiment of the present application.

Detailed Description

For the convenience of understanding the bidirectional controllable clutch provided in the embodiments of the present application, an application scenario of the bidirectional controllable clutch provided in the present application will be described first. The bidirectional controllable clutch provided by the embodiment of the application can be applied to automobiles, and is exemplarily a four-wheel drive automobile. Because the four-wheel drive automobile does not need to start all power on all road conditions, when only the front driving force or the rear driving force needs to be started, the motor which is not started has the phenomenon of back dragging, and extra energy loss is easily caused. Therefore, there is a need to timely power-disconnect electric drives that do not need to be powered.

In order to switch between power connection and power interruption, one conventional clutch is a mechanical bidirectional controllable clutch with a pusher dog. The shifting claw in the clutch rotates along with the clutch, flexible switching of power disengagement and combination cannot be realized in operation, and shutdown gear shifting is required. Another type of existing clutch is a bi-directionally controllable overrunning clutch. The bidirectional controllable overrunning clutch is matched with the wedge claws through the wedge grooves to realize four working modes of positive unidirectional overrunning, reverse unidirectional overrunning, bidirectional overrunning and bidirectional wedging. However, the two-way controllable overrunning clutch has the risk that the power cannot be disengaged, and the structure is complex.

In view of this, the present disclosure provides a bidirectional controllable clutch and an automobile, so as to provide a bidirectional controllable clutch with a compact structure.

The terminology used in the following examples is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the specification of this application and the appended claims, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, such as "one or more", unless the context clearly indicates otherwise.

Reference throughout this specification to "one embodiment" or "some embodiments," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless expressly specified otherwise.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

Fig. 1 is a schematic structural diagram of a bi-directionally controllable clutch 100 according to an embodiment of the present application. Referring to the structure shown in fig. 1, a clutch 100 includes an exciter assembly 10. Illustratively, one end of the exciter assembly 10 is provided with a flange structure a. It should be understood that field assembly 10 may be secured or relatively secured to other structures by flange configuration a. The end of the field assembly 10 where the flange structure a is provided is defined as a "mounting end", and the structure shown in fig. 1 is a structural view as viewed from the mounting end. Of course, the fixing structure on the excitation assembly 10 is not limited to the flange structure a, and other structures may be selected according to the requirement, which is not described herein again.

With continued reference to the structure shown in fig. 1, the field assembly 10 has a receiving space, the inner ring 20 and the outer ring 30 are both rotatably mounted in the receiving space around the axis, and the axis of the outer ring 30 coincides with the axis of the inner ring 20. It should be understood that since the inner ring 20 and the outer ring 30 are installed in the receiving space, the receiving space is not identified in the drawings. As for the position relationship between the outer ring 30 and the inner ring 20, specifically, the outer ring 30 is sleeved outside the inner ring 20 and is disposed between the inner ring 20 and the field assembly 10.

Fig. 2 is a schematic structural diagram of the bi-directionally controllable clutch 100 provided in the embodiment of the present application, as viewed from direction b in fig. 1. As shown in fig. 2, the side of outer ring 30 facing away from the mounting end of field assembly 10 protrudes out of field assembly 10. It should be understood that the portion of the outer ring 30 that protrudes out of the receiving space may be connected to other devices. Of course, the position where the outer ring 30 is connected to other devices is not limited thereto, and will not be described in detail.

Fig. 3 is a cross-sectional view of the structure of fig. 1 at C-C, viewed in direction b. Fig. 4 is a partial cross-sectional view of the structure of fig. 1 at D. Referring to fig. 3 in conjunction with fig. 4, an active area M is formed between the inner ring 20 and the outer ring 30, and the cage 40 is installed in the active area M. Specifically, the retainer 40 is disposed between the inner ring 20 and the outer ring 30 in the radial direction, the retainer 40 is provided with a plurality of first mounting holes 41 distributed along the circumferential direction, each first mounting hole 41 is mounted with one first rolling element 50, and the first rolling element 50 can move relative to the first mounting hole 41 in the radial direction. Illustratively, the first rolling member 50 is shown in the form of a roller, although the first rolling member 50 may also be provided as a ball.

With continuing reference to fig. 3 in conjunction with fig. 4, a plurality of retaining grooves S are formed on a side of the outer ring 30 facing the holder 40, and each retaining groove S corresponds to one of the first mounting holes 41. In the structure shown in fig. 4, each of the retaining grooves S has a first retaining segment S1, a second retaining segment S2, and a third retaining segment S3. In the circumferential direction, the second stopper segment S2 and the third stopper segment S3 are located at two sides of the first stopper segment S1. Illustratively, the second stopper segment S2, the first stopper segment S1, and the third stopper segment S3 are arranged in a clockwise direction. It should be understood that the number of the limiting grooves S on the outer ring 30 can be set as desired. Illustratively, the outer ring is provided with six spacing grooves S arranged at intervals in the circumferential direction, and as shown in the structure of fig. 1, the six spacing grooves S are evenly arranged at intervals to six equal divisions of the outer ring 30. It should be understood that six first mounting holes 41 are provided on the holder 40 in order to correspond to the number of the stopper grooves S.

It is noted that one of the outer ring 30 and the inner ring 20 may serve as an input terminal, and the other may serve as an output terminal.

For clarity, the working states of the bidirectional controllable clutch 100 provided in the embodiment of the present application are illustrated by the second limiting segment S2, the first limiting segment S1, and the third limiting segment S3 being arranged clockwise, and the inner ring 20 being the input end. Specifically, the bi-directionally controllable clutch 100 provided by the embodiments of the present application has at least the following operating states.

When the excitation assembly 10 is not in operation, please refer to the structure shown in fig. 1, the inner ring 20 is rotated counterclockwise relative to the outer ring 30 in the arrow direction in fig. 1 until each first rolling member 50 abuts between the outer ring 30 and the inner ring 20. Specifically, referring to the structure shown in fig. 4, since the distance between the end of the second position-limiting section S2 facing the first position-limiting section S1 and the inner ring 20 is greater than the diameter of the first rolling element 50, and the distance between the end of the second position-limiting section S2 facing away from the first position-limiting section S1 and the inner ring 20 is less than the diameter of the first rolling element 50, the first rolling element 50 can enter the second position-limiting section S2 from the first position-limiting section S1, and directly abut against the corresponding second position-limiting section S2 and the outer edge of the inner ring 20, so as to be in the state shown in fig. 4.

It should be noted that, at this time, the inner ring 20 and the outer ring 30 are self-locked via the first rolling element 50, and the bidirectional controllable clutch 100 provided in the embodiment of the present application rotates counterclockwise to output torque from the outer ring 30.

When the exciter assembly 10 is not in operation, the inner ring 20 is rotated clockwise with respect to the outer ring 30 in the direction of the arrow in fig. 5 until each of the first rolling members 50 abuts between the outer ring 30 and the inner ring 20 as shown in fig. 5. Fig. 6 is a cross-sectional view of the structure of fig. 5 at C-C, viewed in direction b. Fig. 7 is a partial cross-sectional view of the structure of fig. 5 at D. Referring to the structure shown in fig. 6 and 7, since the distance between the end of the third position-limiting section S3 facing the first position-limiting section S1 and the inner ring 20 is greater than the diameter of the first rolling element 50, and the distance between the end of the third position-limiting section S3 departing from the first position-limiting section S1 and the inner ring is less than the diameter of the first rolling element 50, the first rolling element 50 can enter the third position-limiting section S3 from the first position-limiting section S1, directly abut against the third position-limiting section S3 corresponding to the third position-limiting section S3838 and the outer edge of the inner ring 20, and is in the state shown in fig. 7.

At this time, the inner ring 20 and the outer ring 30 are self-locked via the first rolling element 50, and the bidirectional controllable clutch 100 provided by the embodiment of the present application rotates clockwise to output torque from the outer ring 30.

It should be understood that the state of self-locking the output torque of the inner ring 20 and the outer ring 30 is a power-on state, and the state of self-locking the inner ring 20 and the outer ring 30 is a power-off state.

When switching from power-on to power-off is required, since the first rolling member 50 in the power-on state is located at the second stopper section S2 or the third stopper section S3, the rotation speed of the inner ring 20 needs to be controlled to rotate the inner ring 20 appropriately. When the inner ring 20 rotates to a proper position, the excitation assembly 10 is turned on to magnetically attract the first rolling element 50 to be attached to the first position-limiting section S1. At this time, the clutch 100 provided in the embodiment of the present application is in the state as illustrated in fig. 8. Fig. 9 is a cross-sectional view of the structure of fig. 8 at C-C, as viewed in direction b. Fig. 10 is a partial cross-sectional view of the structure of fig. 8 at D. Referring to the structure shown in fig. 9 and 10, in this state, since the distance between the first stopper section S1 and the inner ring 20 is larger than the diameter of the first rolling member 50, the first rolling member 50 is no longer in contact with the outer surface of the inner ring 20, and the clutch 100 is completely unlocked.

It should be noted that, at this time, the output end of the clutch 100 can rotate around the axis clockwise or counterclockwise, and no power is output during the rotation. In other words, the clutch 100 is in a free-wheeling state.

When the power is required to be switched from power off to power on, the rotating speed of the inner ring 20 is controlled, the rotating speeds of the inner ring 20 and the outer ring 30 are close, and the excitation assembly 10 is switched off. At this time, the first rolling member 50 is no longer attracted by the exciting assembly 10 and is in a free state. The first rolling element 50 is brought into a locking position in the corresponding direction by the relative rotational movement of the inner ring 20 and the outer ring 30.

It will be appreciated that when the outer ring 30 is the input, the direction of rotation of the outer ring 30 in each operating condition is opposite to the direction of rotation of the inner ring 20.

In combination with the above working states, the bidirectional controllable clutch 100 provided in the embodiment of the present application can realize the power disengagement between the inner ring 20 and the outer ring 30, and can also realize the bidirectional power transmission between the inner ring 20 and the outer ring 30, and the clutch 100 has the advantages of simple and small structure and convenient control.

In order to enable the first rolling element 50 to move smoothly among the first stopper segment S1, the second stopper segment S2 and the third stopper segment S3, for example, as shown in fig. 10, a transition connection may be provided between the first stopper segment S1 and the second stopper segment S2, and the first stopper segment S1 and the third stopper segment S3 along the circumferential direction.

With continued reference to the structure shown in fig. 10, when the structure of the first mounting hole 41 is specifically provided, there may be provided: the opening size of each first mounting hole 41 on the side toward the outer ring 30 is larger than the opening size of the first mounting hole 41 on the side toward the inner ring 20. It is to be noted that the size of the opening of each first mounting hole 41 toward the side of the outer ring 30 needs to be larger than the diameter of the first rolling member 50 so that the first rolling member 50 can move freely toward the outer ring by the exciter assembly 10.

When the bidirectional controllable clutch 100 provided in the embodiment of the present application is specifically provided, baffles may be further disposed at two ends of the retainer 40 to limit the inner ring 20 and the outer ring 30 along the extending direction of the shaft axis, or the inner ring 20 and/or the outer ring 30 may be provided with a shoulder, so that the shoulder is used to limit the inner ring 20 and the outer ring 30 along the extending direction of the shaft axis. The setting can be specifically carried out according to the requirements, and the detailed description is omitted here.

In addition, when the bidirectional controllable clutch 100 provided in the embodiment of the present application is specifically provided, an adjusting structure may be further provided between the inner ring 20 and the outer ring 30 to improve the coaxiality of the inner ring 20 and the outer ring 30. Fig. 11 is another structural schematic diagram of the bidirectional controllable clutch 100 according to the embodiment of the present application. Fig. 12 is a schematic view of the structure of the clutch provided in fig. 11, as viewed in direction b. Fig. 13 is a cross-sectional view of the structure of fig. 11 at C-C, as viewed in direction b. Since the cross-sectional view at D in fig. 11 is the same as that shown in fig. 4, it is not shown here. Referring to fig. 13 in conjunction with fig. 11 and 12, the holder 40 shown in fig. 3 is shown by a first sub-holder 40a and a second sub-holder 40b, and the second sub-holder 40b and the first sub-holder 40a are arranged along the extension direction of the shaft axis. Illustratively, as shown in fig. 13, the second sub-holder 40b is located on a side of the first sub-holder 40a facing away from the mounting end. It is to be noted that the second sub-holder 40b is fixed in position relative to the first sub-holder 40a in the circumferential direction. Specifically, the first sub-holder 40a is provided with a first mounting hole 41; the second sub-holder 40b is provided with a second mounting hole (not shown) having a size larger than that of the first mounting hole 41; the second rolling member 60 is installed in the second installation hole. And the second rolling elements 60 are disposed between the inner ring 20 and the outer ring 30.

The arrangement direction of the plurality of first rolling members 50 and the plurality of second rolling members 60 in the circumferential direction is as shown in fig. 11.

Of course, it is also possible to use the structure shown in fig. 13, in which the first sub-holder 40a and the second sub-holder 40b are an integrated structure, that is, the same holder structure is provided with both the first mounting hole 50 and the second mounting hole 60, and the arrangement may be specifically performed according to the requirements, and will not be described herein again.

It should be understood that when the second rolling elements 60 abut between the inner ring 20 and the outer ring 30, the second rolling elements 60 serve not only as rolling bodies but also for circumferential positioning to obtain a higher accuracy of coaxiality of the inner ring 20 and the outer ring 30. Meanwhile, the second rolling member 60 is not limited to a cylinder but may be a sphere.

In addition, the operation state of the clutch 100 shown in fig. 11 is similar to the operation state of the clutch 100 shown in fig. 1, and here, the second stopper segment S2, the first stopper segment S1 and the third stopper segment S3 are arranged clockwise, and the inner ring 20 is taken as an input end. Specifically, the embodiment of the present application as shown in fig. 11 provides a bi-directionally controllable clutch 100 having at least the following operating states.

When the excitation assembly 10 is not in operation, please refer to the structure shown in fig. 11, the inner ring 20 is rotated counterclockwise relative to the outer ring 30 in the arrow direction in fig. 11 until each first rolling member 50 abuts between the outer ring 30 and the inner ring 20. It should be noted that, at this time, the inner ring 20 and the outer ring 30 are self-locked via the first rolling element 50, and the bidirectional controllable clutch 100 provided in the embodiment of the present application rotates counterclockwise to output torque from the outer ring 30.

When the exciter assembly 10 is not operated, the inner ring 20 is rotated clockwise with respect to the outer ring 30 in the arrow direction in fig. 14 until each of the first rolling members 50 abuts between the outer ring 30 and the inner ring 20 as shown in fig. 14. Fig. 15 is a cross-sectional view of the structure of fig. 5 at C-C, as viewed in direction b. Since the cross-sectional view at D in fig. 14 is the same as the structure shown in fig. 7, it is not shown here. At this time, the inner ring 20 and the outer ring 30 are self-locked via the first rolling element 50, and the bidirectional controllable clutch 100 provided by the embodiment of the present application rotates clockwise to output torque from the outer ring 30.

When switching from power-on to power-off is required, the rotation speed of the inner ring 20 needs to be controlled to allow the inner ring 20 to properly revolve. When the inner ring 20 rotates to a proper position, the exciting assembly 10 is switched on to magnetically attract the first rolling member 50 to the highest position of the fitting limiting groove S. At this time, the clutch 100 provided in the embodiment of the present application is in the state shown in fig. 16. Fig. 17 is a cross-sectional view of the structure of fig. 16 at C-C, as viewed in direction b. Since the cross-sectional view at D in fig. 16 is the same as the structure shown in fig. 10, it is not shown here. At this time, the first rolling element 50 is no longer in abutment with the outer surface of the inner ring 20, and the clutch 100 completes unlocking.

It should be noted that, at this time, the output end of the clutch 100 can rotate around the axis clockwise or counterclockwise, and no power is output during the rotation. In other words, the clutch 100 is in a freely rotating state.

Fig. 18 shows a vehicle 200 provided in the embodiment of the present application, and the vehicle 200 is equipped with a powertrain P as shown in fig. 18. With continued reference to the structure shown in fig. 18, the powertrain P provided in the embodiment of the present application includes a motor 300 and a bi-directionally controllable clutch 100 provided in any of the above-described embodiments. It should be understood that the motor 300 is drivingly connected to either the inner ring 20 or the outer ring 30 of the clutch 100. Illustratively, as shown in fig. 18, the motor 300 is drivingly connected to the inner ring 20. Of course, the powertrain P also comprises other components, not shown here.

It should be noted that the clutch 100 shown in fig. 18 can realize the power disengagement between the inner ring 20 and the outer ring 30 and the two-way power transmission between the inner ring 20 and the outer ring 30, and the clutch 100 has the advantages of simple and compact structure and convenient control. When only the forward driving force or the backward driving force of the automobile 200 is turned on, the clutch 100 can be used for controlling to avoid the reverse dragging phenomenon.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A bi-directionally controllable clutch, comprising:

an excitation assembly having an accommodation space;

an inner ring rotatably mounted to the receiving space about an axis;

the outer ring can be rotatably arranged in the accommodating space around an axis, the axis of the outer ring is superposed with the axis of the inner ring, and the outer ring is sleeved outside the inner ring; an active area is arranged between the outer ring and the inner ring, and a retainer is arranged in the active area; along the circumferential direction, the retainer is provided with a plurality of first mounting holes arranged at intervals; a first rolling member is arranged in each first mounting hole, and each first rolling member can move relative to the first mounting hole along the radial direction; a limiting groove corresponding to the first mounting hole is formed in the inner side of the outer ring; each limiting groove is provided with a first limiting section, a second limiting section and a third limiting section, and the second limiting section and the third limiting section are positioned on two sides of the first limiting section along the circumferential direction; the distance between the first limiting section and the inner ring is larger than the diameter of the first rolling part, the distance between one end of the second limiting section and one end of the third limiting section, which face the first limiting section, and the inner ring is larger than the diameter of the first rolling part, and the distance between one end of the second limiting section and one end of the third limiting section, which face away from the first limiting section, and the inner ring is smaller than the diameter of the first rolling part;

the excitation assembly is further used for adsorbing the first rolling piece to the first limiting section in a power-on state.

2. The bi-directionally controllable clutch of claim 1, wherein said first limit stop segment is in transitional connection with said second limit stop segment and said first limit stop segment is in transitional connection with said third limit stop segment in a circumferential direction.

3. The bidirectionally controllable clutch according to claim 1 or 2, wherein an opening size of said first mounting hole toward a side of said outer ring is larger than an opening size of said first mounting hole toward a side of said inner ring, and an opening size of each of said first mounting holes toward a side of said outer ring is larger than a diameter of said first rolling member.

4. The bidirectionally controllable clutch according to any one of claims 1 to 3, wherein said cage is further provided with a second mounting hole, said second mounting hole being aligned with said first mounting hole in the direction of extension of the shaft axis, and the size of said second mounting hole being larger than the size of said first mounting hole; and a second rolling piece is arranged in the second mounting hole, and the second rolling piece is abutted between the inner ring and the outer ring along the radial direction.

5. The bidirectionally controllable clutch according to any one of claims 1 to 3, wherein said cage comprises a first sub-cage and a second sub-cage, said second sub-cage being aligned with said first sub-cage in the direction of elongation of the shaft axis and being fixed in position relative to said first sub-cage in the circumferential direction, wherein:

the first sub-retainer is provided with the first mounting hole;

6. A bi-directionally controllable clutch as claimed in claim 4 or 5 wherein said second rolling member is a roller; alternatively, the first and second electrodes may be,

the second rolling member is a ball.

7. The bi-directionally controllable clutch of any of claims 1-6, wherein said first rolling member is a roller; alternatively, the first and second electrodes may be,

the first rolling member is a ball.

8. The bidirectionally controllable clutch according to any one of claims 1 to 7, wherein said cage has a stop at each end for limiting said inner race and said outer race in the direction of extension of the shaft axis.

9. A bidirectionally controllable clutch according to any of claims 1-7, wherein said inner and/or outer ring has shoulders for limiting said inner and outer ring in the direction of extension of the shaft axis.

10. A drive assembly comprising an electric machine and a bidirectionally controllable clutch according to any of claims 1-9, said electric machine being in driving connection with an inner or outer ring of said clutch.

11. A motor vehicle comprising a powertrain according to claim 10.