Electromagnetic controllable multi-gear overrunning clutch

Abstract

The utility model discloses an electromagnetic controllable multi-gear overrunning clutch, which relates to the technical field of clutches and comprises a clutch body and an electromagnetic driving unit. The clutch body is composed of an inner ring, an outer ring, an inner retainer, an outer retainer and an axial push plate and has a one-way overrunning mode and a two-way locking mode. The outer ring is provided with an operation groove and a driving groove, the axial push plate can move in the axial direction of the outer ring, the outer retainer is provided with a first shifting piece set and a first driving piece, and the inner retainer is provided with a second shifting piece set and a second driving piece. The electromagnetic drive unit controls the axial push plate to move, and switching of different overrunning modes is achieved. The clutch is simple in structure, low in operation power consumption, stable in gear shifting, long in service life and suitable for various power output scenes.

Description

TECHNICAL FIELD

[0001] The present application relates to the clutch technical field, especially to electromagnetic controllable multi-gear overrunning clutch. BACKGROUND

[0002] The overrunning clutch is a kind of key mechanical components, mainly used in transmission system, which can efficiently and simply realize the input and output of torque. Its working principle is based on the speed difference or the change of rotation direction of the driving part and the driven part, so as to realize the automatic clutch function. When the rotation speed of the driving part is higher than that of the driven part, the two will engage, ensuring the smooth and stable rotation; on the contrary, when the rotation speed of the driving part is lower than that of the driven part, the two will be separated, avoiding the interference of the driving part to the driven part, so as to protect the transmission system of the driving part.

[0003] The overrunning clutch is widely used because of its simple structure, small size and strong working reliability. However, with the continuous expansion of application field, the demand for multifunctional overrunning clutch is increasing. The working mode of traditional overrunning clutch is relatively single, which cannot meet the demand of one-way or two-way transmission, disconnection and other diversified working modes of the clutch between the driving part and the driven part. CONTENT OF THE INVENTION

[0004] Therefore, the purpose of the present application is to provide an electromagnetic controllable multi-gear overrunning clutch, which can realize the functions of three-gear conversion of bidirectional overrunning, unidirectional overrunning and bidirectional locking, and meet the demand of different power modes.

[0005] To achieve the above technical purpose, the present application provides an electromagnetic controllable multi-gear overrunning clutch, which comprises a clutch body and an electromagnetic driving unit.

[0006] The clutch body comprises an inner ring, an outer ring, an inner retainer, an outer retainer and an axial push plate.

[0007] The outer ring is installed outside the inner ring, and is provided with a first operation groove and a second operation groove distributed along the circumferential direction of the outer ring.

[0008] The axial push plate is installed on the axial side of the outer ring, and can move axially relative to the outer ring along the outer ring, while being fixedly connected with the outer ring in the circumferential direction of the outer ring.

[0009] The driving groove is arranged on the axial push plate.

[0010] The outer retainer is installed between the outer ring and the axial push plate, and is provided with a first tab group extending into the first operation groove on one side.

[0011] The first operation groove is provided with a first reset elastic member and a first roller.

[0012] The first roller is arranged in the first dial group;

[0013] The first reset elastic member is used for driving the first dial group to reset;

[0014] The other side of the outer holder is provided with a first driving piece extending into the driving slot;

[0015] The first driving piece is provided with a first inclined surface;

[0016] The first inclined surface can be in contact with and relatively move with one side of the driving slot in a first stroke of the axial push plate moving close to the outer ring;

[0017] The inner holder is mounted between the outer holder and the outer ring, and one side is provided with a second dial group extending into the second operation slot;

[0018] The second operation slot is provided with a second reset elastic member and a second roller;

[0019] The second roller is arranged in the second dial group;

[0020] The second reset elastic member is used for driving the second dial group to reset;

[0021] The other side of the inner holder is provided with a second driving piece extending into the driving slot;

[0022] The second driving piece is provided with a second inclined surface;

[0023] The second inclined surface can be in contact with and relatively move with the other side of the driving slot in a second stroke of the axial push plate moving close to the outer ring, wherein the second stroke is greater than or less than the first stroke;

[0024] The electromagnetic driving unit is used for driving the axial push plate to move close to the outer ring.

[0025] Further, the first operation slot and the second operation slot are at least two and are circumferentially staggered.

[0026] Further, the axial push plate is provided with a first connecting portion;

[0027] The outer ring is provided with a second connecting portion;

[0028] The first connecting portion and the second connecting portion are in sliding connection in the axial direction of the outer ring;

[0029] The outer ring is provided with a limiting member;

[0030] The limiting member is used for limiting the sliding stroke of the first connecting portion.

[0031] Further, the first connecting part is a claw structure arranged on one side surface of the axial push plate;

[0032] The second connecting part is a clamping groove structure arranged on the outer circumferential surface of the outer ring, and both ends penetrate through the two side surfaces of the outer ring;

[0033] The claw part at the end of the first connecting part is arranged outward, and a step part is formed between the outer side surface of the first connecting part and one side surface of the axial push plate;

[0034] The limiting part is located between the claw part and the step part, and can be in contact with the claw part or the step part.

[0035] Further, the first connecting part is at least three, uniformly distributed in the circumference;

[0036] The second connecting part is at least three, corresponding to the first connecting part one by one.

[0037] Further, the limiting part is a clamping spring;

[0038] The outer circumferential surface of the outer ring is provided with a clamping spring groove for installing the limiting part.

[0039] Further, the electromagnetic drive unit includes a coil assembly and a push ring assembly;

[0040] The coil assembly includes a shell and a coil module arranged in the shell;

[0041] The push ring assembly is arranged in the inner ring of the shell;

[0042] The coil module is used to generate electromagnetic force when energized, so as to drive the push ring assembly to move the axial push plate close to the outer ring.

[0043] Further, the push ring assembly includes an inner push ring and an outer push ring;

[0044] The outer push ring is fixedly installed outside the inner push ring;

[0045] One end of the inner push ring is provided with a pushing protrusion;

[0046] The other side of the axial push plate is provided with a positioning groove for clamping the pushing protrusion.

[0047] Further, the drive slot is a plurality of, and is uniformly distributed in the circumference;

[0048] The first drive piece is a plurality of, corresponding to the drive slot one by one;

[0049] The second drive piece is a plurality of, corresponding to the drive slot one by one.

[0050] Further, the first shifting piece group is composed of two first shifting piece members arranged at intervals;

[0051] The first roller is arranged between the two first shifting piece members;

[0052] The second shifting piece group is composed of two second shifting piece members arranged at intervals;

[0053] The two rollers are arranged between the two second shifting piece members;

[0054] The first reset elastic member and the second reset elastic member are compression springs.

[0055] From the above technical solution, the electromagnetic controllable multi-gear overrunning clutch designed in the application has the following beneficial effects:

[0056] 1. When the electromagnetic driving unit drives the axial push plate to move a first stroke to approach the outer ring, the first shifting piece group can be driven to move in a first rotation direction to compress the first reset elastic member by cooperation of the driving groove and the first driving piece of the outer retainer, thereby realizing the one-way overrunning mode; when the push plate is further driven to move a second stroke to approach the outer ring (for example, the second stroke is smaller than the first stroke), the second shifting piece group can be further driven to move in a second rotation direction opposite to the first rotation direction to compress the second reset elastic member by cooperation of the driving groove and the second driving piece of the inner retainer, at this time, since the corresponding reset elastic members are compressed from two rotation directions respectively, the one-way overrunning mode can be switched to the bidirectional locking mode. When the electromagnetic driving unit is not working, the first reset elastic member and the second reset elastic member can drive the inner retainer and the outer retainer to reset rotation, thereby returning to the bidirectional overrunning mode. Through the design, the conversion of the one-way overrunning / bidirectional overrunning / bidirectional locking three gears can be realized, so that the application scenarios of the power output are more extensive.

[0057] 2. The electromagnetic force driving mode is adopted for driving, and the rotation control of the two retainers under different strokes is realized through the relative movement cooperation of the inclined surfaces, which has the advantages of simple structure, small operation power consumption, smooth gear shifting and long service life. BRIEF DESCRIPTION OF DRAWINGS

[0058] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0059] Figure 1 It is a perspective view of the electromagnetic controllable multi-gear overrunning clutch provided in the application.

[0060] Figure 2 Fig. 1 is a perspective view of the electromagnetic controllable multi-gear overrunning clutch provided in the present application in a half-section state;

[0061] Figure 3 Fig. 2 is a perspective view of the electromagnetic drive unit of the electromagnetic controllable multi-gear overrunning clutch provided in the present application in a half-section state;

[0062] Figure 4 Fig. 3 is a first perspective view of the cooperation between the inner retainer and the outer retainer of the electromagnetic controllable multi-gear overrunning clutch provided in the present application;

[0063] Figure 5 Fig. 4 is a second perspective view of the cooperation between the inner retainer and the outer retainer of the electromagnetic controllable multi-gear overrunning clutch provided in the present application;

[0064] Figure 6 Fig. 5 is a schematic view of the cooperation between the outer ring and the axial push plate of the electromagnetic controllable multi-gear overrunning clutch provided in the present application;

[0065] Figure 7 Fig. 6 is a partial schematic view of the electromagnetic controllable multi-gear overrunning clutch provided in the present application in a bidirectional overrunning state;

[0066] Figure 8 Fig. 7 is a partial schematic view of the electromagnetic controllable multi-gear overrunning clutch provided in the present application in a unidirectional overrunning state;

[0067] Figure 9 Fig. 8 is a partial schematic view of the electromagnetic controllable multi-gear overrunning clutch provided in the present application in a bidirectional locking state;

[0068] In the figure: 1, outer ring; 11, first operation groove; 12, second operation groove; 13, second connecting part; 14, snap spring groove; 15, limiting part; 2, inner ring; 3, axial push plate; 31, drive groove; 32, first connecting part; 321, bent jaw part; 322, step part; 33, positioning groove; 4, electromagnetic drive unit; 41, coil assembly; 411, shell; 412, coil module; 42, push ring assembly; 421, outer push ring; 422, inner push ring; 4221, push protrusion; 5, outer retainer; 51, first tab group; 511, first tab part; 52, first drive tab; 521, first inclined surface; 6, inner retainer; 61, second tab group; 611, second tab part; 62, second drive tab; 621, second inclined surface; 71, first roller; 72, second roller; 81, first reset elastic part; 82, second reset elastic part. DETAILED DESCRIPTION

[0069] The technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts are within the scope of the present application.

[0070] In the description of the embodiments of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the purpose of facilitating the description of the embodiments of the present application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0071] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, it can be fixed connection, or replaceable connection, or integral connection, it can be mechanical connection, or electrical connection, it can be direct connection, or indirect connection through an intermediate medium, or internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0072] The embodiments of the present application disclose an electromagnetic controllable multi-gear overrunning clutch.

[0073] Please refer to Figure 1 and Fig. 2, one embodiment of the electromagnetic controllable multi-gear overrunning clutch provided in the embodiments of the present application includes:

[0074] The clutch body and the electromagnetic drive unit 4.

[0075] The clutch body includes an inner ring 2, an outer ring 1, an inner retainer 6, an outer retainer 5, and an axial push plate 3.

[0076] The outer ring 1 is mounted outside the inner ring 2, and is provided with a first operation groove 11 and a second operation groove 12 distributed along the circumferential direction of the outer ring 1.

[0077] The axial push plate 3 is mounted on one axial side of the outer ring 1, and can move axially relative to the outer ring 1 along the outer ring 1, while being fixedly connected to the outer ring 1 in the circumferential direction of the outer ring 1. It can be understood that the axial push plate 3 can only be pushed in the axial direction.

[0078] The axial push plate 3 is provided with a driving groove 31, which is an arc-shaped through groove.

[0079] The outer retainer 5 is installed between the outer ring 1 and the axial push plate 3, and one side is provided with a first flip group 51 extending into the first operation groove 11; the first operation groove 11 is provided with a first reset elastic member 81 and a first roller 71; the first roller 71 is arranged in the first flip group 51; the first reset elastic member 81 is used to drive the first flip group 51 to reset.

[0080] The other side of the outer retainer 5 is provided with a first driving piece 52 extending into the driving groove 31; the first driving piece 52 is provided with a first inclined surface 521; the first inclined surface 521 can be in contact with and relatively move with one side of the driving groove 31 in a first stroke of the axial push plate 3 moving close to the outer ring 1; when the axial push plate 3 moves close to the outer ring 1, it can only move axially due to the limitation, and through the cooperation of the driving groove 31 and the first inclined surface 521, it can be converted into a rotary motion of the outer retainer 5 in a first rotation direction, thereby driving the first flip group 51 to compress the first reset elastic member 81.

[0081] The inner retainer 6 is installed between the outer retainer 5 and the outer ring 1 (the inner retainer 6 and the outer retainer 5 are embedded with each other), and one side is provided with a second flip group 61 extending into the second operation groove 12; the second operation groove 12 is provided with a second reset elastic member 82 and a second roller 72; the second roller 72 is arranged in the second flip group 61; the second reset elastic member 82 is used to drive the second flip group 61 to reset.

[0082] The other side of the inner retainer 6 is provided with a second driving piece 62 extending into the driving groove 31; the second driving piece 62 is provided with a second inclined surface 621; the second inclined surface 621 can be in contact with and relatively move with the other side of the driving groove 31 in a second stroke of the axial push plate 3 moving close to the outer ring 1, wherein the second stroke is greater than or less than the first stroke; taking the case that the second stroke is greater than the first stroke as an example, the second stroke can be understood as a stroke of continuing to push the axial push plate 3 in the direction close to the outer ring 1 on the basis of the first stroke; conversely, taking the case that the second stroke is less than the first stroke as an example, the first stroke can be understood as a stroke of continuing to push the axial push plate 3 in the direction close to the outer ring 1 on the basis of the second stroke. It can be understood that in the first stroke, the inner retainer 6 can be first pushed to rotate, or the outer retainer 5 can be first pushed to rotate, and those skilled in the art can make changes and designs according to actual needs, which are not limited.

[0083] Since the first inclined surface 521 only relatively moves in the first stroke, when the axial push plate 3 continues to push, the first inclined surface 521 no longer participates in the relative motion, and instead the second inclined surface 621 of the inner retainer 6 participates in the relative motion, so that the inner retainer 6 can rotate in a second rotation direction opposite to the first rotation direction under the action of the axial push plate 3, thereby causing the second flip group 61 to compress the second reset elastic member 82.

[0084] The two side faces of the first driving piece 52 and the second driving piece 62 are vertical faces, and the top faces are respectively provided with a first inclined surface 521 and a second inclined surface 621. When the axial push plate 3 is further pushed on the basis of the first stroke, at this time, one side vertical face of the first driving piece 52 is attached to one side of the driving groove 31, at this time, the first driving piece 52 is no longer driven to rotate, and the second inclined surface 621 of the second driving piece 62 is moved relative to the other side of the driving groove 31, so that the inner retainer 6 is rotated. Taking the first stroke greater than the second stroke as an example, that is, the inner retainer 6 is rotated first, then the height of the second driving piece 62 of the inner retainer 6 is higher than the height of the first driving piece 52 of the outer retainer 5; taking the second stroke greater than the first stroke as an example, that is, the outer retainer 5 is rotated first, then the height of the first driving piece 52 of the outer retainer 5 is higher than the height of the second driving piece 62 of the inner retainer 6.

[0085] The electromagnetic driving unit 4 is used to drive the axial push plate 3 to move close to the outer ring 1, adopts an electromagnetic driving mode to drive the axial push plate 3 to move, has faster response speed, small power consumption and more stable operation.

[0086] The electromagnetic controllable multi-gear overrunning clutch designed in the application has the following beneficial effects:

[0087] 1. Through the accurate control of the electromagnetic driving unit 4, when the axial push plate 3 moves the first stroke to move close to the outer ring 1, the first driving piece 52 on the outer retainer 5 can be cleverly used to tightly match the driving groove 31, and then drive the first driving piece group 51 to move along the first rotation direction. In this process, the first reset elastic member 81 is compressed, so as to realize the one-way overrunning mode. When the driving push plate continues to move close to the outer ring 1 and moves the second stroke (taking the second stroke less than the first stroke as an example), the cooperation of the driving groove 31 and the second driving piece 62 on the inner retainer 6 again plays a role, drives the second driving piece group 61 to move along the second rotation direction opposite to the first rotation direction, and compresses the second reset elastic member 82. In this case, since the reset elastic members in the two rotation directions are compressed, the switching from the one-way overrunning mode to the bidirectional locking mode can be smoothly realized. When the electromagnetic driving unit 4 is in a non-working state, the first reset elastic member 81 and the second reset elastic member 82 will play their roles, drive the inner retainer 6 and the outer retainer 5 to reset and rotate, so that the whole system returns to the bidirectional overrunning mode. This design cleverly realizes the flexible conversion of the one-way overrunning, bidirectional overrunning and bidirectional locking three gears, greatly expands the application range of the device in the power output scene, and makes it able to adapt to more diversified use requirements.

[0088] 2、The device adopts electromagnetic force driving mode for operation, and realizes accurate rotation control of the two holding frames under different strokes through the ingenious cooperation of the relative movement of the inclined surfaces. This design not only has a simple structure, but also has low operation power consumption, stable gear shifting process, and long service life. These advantages make the device perform well in actual application, and can meet various severe working conditions and environmental requirements.

[0089] The above is embodiment one of the electromagnetic controllable multi-gear overrunning clutch provided by the embodiment of the present application, and the following is embodiment two of the electromagnetic controllable multi-gear overrunning clutch provided by the embodiment of the present application, please refer to Figures 1 to 9 .

[0090] Based on the scheme of the above embodiment one:

[0091] Further, as Figure 1 indicated, the first operation groove 11 and the second operation groove 12 are both at least two and are circumferentially staggered. Such a design can make the first paddle group 51 and the second paddle group 61 be able to more uniformly compress the first reset elastic member 81 and the second reset elastic member 82 respectively, and improve the stability and smoothness of the gear shifting process of the clutch. In the present application, the first operation groove 11 and the second operation groove 12 are respectively designed as four, and those skilled in the art can make changes according to actual needs, which is not limited.

[0092] Further, as Figure 6 indicated, the axial push plate 3 is provided with a first connecting part 32; the outer ring 1 is provided with a second connecting part 13; the first connecting part 32 and the second connecting part 13 are slidingly connected in the axial direction of the outer ring 1; the outer ring 1 is provided with a limiting part 15; and the limiting part 15 is used to limit the sliding stroke of the first connecting part 32.

[0093] Such a design can ensure that the axial movement of the axial push plate 3 on the outer ring 1 is stable and controllable, and avoid damage or failure caused by excessive movement. At the same time, the existence of the limiting part 15 can effectively limit the movement range of the axial push plate 3, further enhancing the stability and reliability.

[0094] Further, as Figure 6 indicated, the first connecting part 32 is a clamping jaw structure provided on one side surface of the axial push plate 3; the second connecting part 13 is a clamping groove structure provided on the outer circumferential surface of the outer ring 1, and the two ends penetrate through the two side surfaces of the outer ring 1; the clamping jaw part 321 at the end of the first connecting part 32 is arranged outward, a step part 322 is formed between the outer side surface of the first connecting part 32 and one side surface of the axial push plate 3; and the limiting part 15 is located between the clamping jaw part 321 and the step part 322, and can be in contact with the clamping jaw part 321 or the step part 322.

[0095] The cooperation design of the clamping jaw structure and the clamping groove structure not only makes the sliding connection of the axial push plate 3 and the outer ring 1 more stable, but also facilitates installation and disassembly. During the movement of the axial push plate 3, the design of the bent jaw part 321 and the step part 322 can cooperate with the limiting piece 15 to accurately control the movement range of the axial push plate 3, avoiding potential risks caused by excessive movement.

[0096] Further, as shown in Figure 6 , the first connecting part 32 is at least three, uniformly distributed in the circumference; the second connecting part 13 is at least three, corresponding to the first connecting part 32 one by one. Such design can further improve the stability of the axial push plate 3 sliding on the outer ring 1, ensuring the reliability and durability of the clutch during operation.

[0097] Further, as shown in Figure 6 , the limiting piece 15 is a clamping spring; the outer periphery of the outer ring 1 is provided with a clamping spring groove 14 for installing the limiting piece 15. The cooperation design of the clamping spring and the clamping spring groove 14 not only makes the installation and disassembly of the limiting piece 15 more convenient, but also ensures the stability and reliability of the limiting piece 15 during the operation of the clutch. During the movement of the axial push plate 3, the clamping spring can accurately limit the movement range of the first connecting part 32, avoiding potential risks caused by excessive movement.

[0098] Further, as shown in Figure 3 , for the design of the electromagnetic drive unit 4, it includes a coil assembly 41 and a push ring assembly 42.

[0099] The coil assembly 41 includes a shell 411 and a coil module 412 arranged in the shell 411; the push ring assembly 42 is arranged in the inner ring 2 of the shell 411; the coil module 412 is used to generate electromagnetic force when energized to drive the push ring assembly 42 to push the axial push plate 3 to move close to the outer ring 1.

[0100] Further, as shown in Figure 2 and Figure 3 , for the design of the push ring assembly 42, it includes an inner push ring 422 and an outer push ring 421.

[0101] The outer push ring 421 is fixedly installed outside the inner push ring 422; the inner push ring 422 is provided with a pushing protrusion 4221 at one end; the other side of the axial push plate 3 is provided with a positioning groove 33 for the pushing protrusion 4221 to be clamped into.

[0102] The matching design of the pushing protrusion 4221 and the positioning groove 33 can ensure that the pushing ring assembly 42 can stably and accurately transmit the pushing force when driving the axial pushing plate 3, and avoid unnecessary shaking or deviation. In the energized state, the electromagnetic force generated by the coil module 412 acts on the outer pushing ring 421, driving the outer pushing ring 421 to move the inner pushing ring 422 close to the outer ring 1, and the pushing protrusion 4221 of the inner pushing ring 422 pushes the axial pushing plate 3 to move along the axial direction of the outer ring 1.

[0103] Further, as shown in Figure 2 and Figure 5 , the driving groove 31 is a plurality of circumferentially uniform distribution; the first driving piece 52 is a plurality of one-to-one corresponding cooperation with the driving groove 31; the second driving piece 62 is a plurality of one-to-one corresponding cooperation with the driving groove 31. This design can realize more stable and reliable rotation control of the outer retainer 5 and the inner retainer 6.

[0104] Further, as shown in Figure 4 , the first shifting piece group 51 is composed of two first shifting piece members 511 arranged at intervals; the first roller 71 is arranged between the two first shifting piece members 511; the second shifting piece group 61 is composed of two second shifting piece members 611 arranged at intervals; the second roller 72 is arranged between the two second shifting piece members 611. When the first shifting piece group 51 or the second shifting piece group 61 rotates, it will shift the roller, and the arrangement of the roller makes the rotation of the first shifting piece group 51 and the second shifting piece group 61 more stable.

[0105] The first reset elastic member 81 and the second reset elastic member 82 are compression springs. The design of the compression spring not only has a simple structure, but also can provide a stable reset force, ensuring the stability and reliability of the clutch during gear shifting.

[0106] The gear shifting process of the electromagnetic controllable multi-gear overrunning clutch designed in the present application is as follows (taking the first stroke greater than the second stroke as an example):

[0107] When the coil assembly 41 is not working, due to the continuous action of the first reset elastic member 81 / second reset elastic member 82 on the outer retainer 5 / inner retainer 6 inside the outer ring 1, under the action of the pre-compression force, the first shifting piece group 51 / second shifting piece group 61 is pushed, making the outer retainer 5 / inner retainer 6 rotate and reset. Due to the reason of the inclined surface cooperation, the axial pushing plate 3 and the outer retainer 5 / inner retainer will also be pushed axially at the same time, and then reset, finally making the pushing ring assembly 42 move to the direction of the coil assembly 41, so that the clutch body finally is in the bidirectional overrunning gear (as shown in Figure 7 , the first reset elastic member 81 and the second reset elastic member 82 are not compressed), at this time the outer ring 1 and the inner ring 2 can rotate separately at different speeds, realizing power disconnection.

[0108] When a primary current is applied to the coil assembly 41, putting it into working state 1, the push ring assembly 42, under the action of electromagnetic force, pushes the axial push plate 3, causing the inner retainer 6 to rotate counterclockwise (rotate in the second rotation direction). The second paddle group 61 of the inner retainer 6 compresses the second reset elastic element 82 of the second operating groove 12 of the outer ring 1. Finally, under the balance of elastic force and electromagnetic force, the inner retainer 6 stops rotating, causing the clutch body to be in a one-way overdrive position (e.g., Figure 8 As shown, the first reset elastic element 81 or the second reset elastic element 82 is compressed. At that time, if they rotate in the same direction, if the speed of the outer ring 1 is greater than the speed of the inner ring 2, it is in an overrunning state and the power is disconnected; if the speed of the outer ring 1 is less than the speed of the inner ring 2, it is in an engaged state and the torque is output; if they rotate in opposite directions, it will always be in an overrunning state and the power will be disconnected.

[0109] When a secondary current is applied to the coil assembly 41, putting it into working state 2, the push ring assembly 42, under the action of electromagnetic force, pushes the axial push plate 3, causing the outer retainer 5 to rotate clockwise (first rotation direction). The first paddle group 51 of the outer retainer 5 compresses the first reset elastic element 81 of the first operating groove 11. Finally, under the balance of elastic force and electromagnetic force, the outer retainer 5 stops rotating, causing the overrunning clutch to be in the bidirectional lock-up position (e.g., Figure 9 As shown, both the first reset elastic element 81 and the second reset elastic element 82 are compressed. At this time, the outer ring 1 and the inner ring 2 are regarded as a whole, and can transmit torque in both directions.

[0110] The electromagnetic controllable multi-speed overrunning clutch provided in this application has been described in detail above. For those skilled in the art, there will be changes in the specific implementation and application scope based on the ideas of the embodiments of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An electromagnetic controllable multi-step overrunning clutch, characterized by, The clutch body comprises an inner ring (2), an outer ring (1), an inner retainer (6), an outer retainer (5) and an axial push plate (3); The outer ring (1) is installed outside the inner ring (2) and is provided with a first operation groove (11) and a second operation groove (12) distributed along the circumference thereof; The axial push plate (3) is installed on the axial side of the outer ring (1) and can move axially relative to the outer ring (1) along the outer ring (1) while being fixedly connected with the outer ring (1) in the circumferential direction of the outer ring (1); The axial push plate (3) is provided with a driving groove (31); The outer retainer (5) is installed between the outer ring (1) and the axial push plate (3) and is provided with a first tab group (51) extending into the first operation groove (11) on one side; The first operation groove (11) is provided with a first reset elastic member (81) and a first roller (71); The first roller (71) is arranged in the first tab group (51); The first reset elastic member (81) is used to drive the first tab group (51) to reset; The other side of the outer retainer (5) is provided with a first driving tab (52) extending into the driving groove (31); The first driving tab (52) is provided with a first inclined surface (521); The first inclined surface (521) can be in contact with and move relative to one side of the driving groove (31) in a first stroke of the axial push plate (3) moving close to the outer ring (1); The inner retainer (6) is installed between the outer retainer (5) and the outer ring (1) and is provided with a second tab group (61) extending into the second operation groove (12) on one side; The second operation groove (12) is provided with a second reset elastic member (82) and a second roller (72); The second roller (72) is arranged in the second tab group (61); The second reset elastic member (82) is used to drive the second tab group (61) to reset; The other side of the inner retainer (6) is provided with a second driving tab (62) extending into the driving groove (31); The second driving tab (62) is provided with a second inclined surface (621); The second inclined surface (621) can be in contact with and move relative to the other side of the driving groove (31) in a second stroke of the axial push plate (3) moving close to the outer ring (1), wherein the second stroke is greater than or less than the first stroke; The electromagnetic driving unit (4) is used to drive the axial push plate (3) to move close to the outer ring (1). The first operation groove (11) and the second operation groove (12) are each at least two and are circumferentially staggered.

2. The electromagnetic controllable multi-step overrunning clutch according to claim 1, wherein, The axial push plate (3) is provided with a first connecting portion (32); 3. The electromagnetic controllable multi-step overrunning clutch of claim 1, wherein, The outer ring (1) is provided with a second connecting portion (13); The first connecting portion (32) and the second connecting portion (13) are slidably connected in the axial direction of the outer ring (1); The outer ring (1) is provided with a limiting member (15); The limiting member (15) is used to limit the sliding stroke of the first connecting portion (32). ​ 4. The electromagnetic controllable multi-step overrunning clutch according to claim 3, wherein, The first connecting part (32) is a claw structure arranged on one side surface of the axial push plate (3); The second connecting part (13) is a clamping groove structure arranged on the outer circumferential surface of the outer ring (1), and both ends penetrate through the two side surfaces of the outer ring (1); The claw part (321) at the end of the first connecting part (32) is arranged outward, and a step part (322) is formed between the outer side surface of the first connecting part (32) and one side surface of the axial push plate (3); The limiting part (15) is located between the claw part (321) and the step part (322), and can be in contact with the claw part (321) or the step part (322).

5. The electromagnetic controllable multi-step overrunning clutch of claim 4, wherein, The first connecting part (32) is at least three, uniformly distributed in the circumference; The second connecting part (13) is at least three, corresponding to the first connecting part (32) one by one.

6. The electromagnetic controllable multi-step overrunning clutch of claim 4, wherein, The limiting part (15) is a clamping spring; The outer circumferential surface of the outer ring (1) is provided with a clamping spring groove (14) for installing the limiting part (15).

7. The electromagnetic controllable multi-step overrunning clutch of claim 1, wherein, The electromagnetic drive unit (4) includes a coil assembly (41) and a push ring assembly (42); The coil assembly (41) includes a shell (411) and a coil module (412) arranged in the shell (411); The push ring assembly (42) is arranged in the inner ring (2) of the shell (411); The coil module (412) is used to generate electromagnetic force when energized to drive the push ring assembly (42) to push the axial push plate (3) to move close to the outer ring (1).

8. The electromagnetic controllable multi-ratio overrunning clutch of claim 7, wherein, The push ring assembly (42) includes an inner push ring (422) and an outer push ring (421); The outer push ring (421) is fixedly installed outside the inner push ring (422); One end of the inner push ring (422) is provided with a pushing protrusion (4221); The other side of the axial push plate (3) is provided with a positioning groove (33) for clamping the pushing protrusion (4221).

9. The electromagnetic controllable multi-step overrunning clutch of claim 1, wherein, The drive groove (31) is a plurality of, and is uniformly distributed in the circumference; The first drive piece (52) is a plurality of, corresponding to the drive groove (31) one by one; The second drive piece (62) is a plurality of, corresponding to the drive groove (31) one by one.

10. The electromagnetic controllable multi-step overrunning clutch of claim 1, wherein, The first drive piece group (51) is composed of two first drive piece parts (511) arranged at intervals; The first roller (71) is arranged between the two first drive piece parts (511); The second drive piece group (61) is composed of two second drive piece parts (611) arranged at intervals; The second roller is arranged between the two second drive piece parts (611); The first reset elastic member (81) and the second reset elastic member (82) are compression springs.

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