Clutch

Abstract

The invention provides a clutch which comprises an input disc, an output disc, a locking block and an elastic piece and can be further provided with an electromagnet. A guide structure matched with the locking block is arranged on the second side of the input disc in the radial direction; the locking block is arranged on the second side of the input disc through the guide structure; the end, away from the edge of the input disc, of the locking block is connected with the elastic piece. Locking teeth protruding inwards are arranged on the inner wall of the containing cavity of the output disc. The second side of the input disc and the output disc are arranged oppositely and coaxially, and the input disc and the output disc are arranged in the containing cavity in a rotatable mode. When the input disc rotates, the locking block moves towards the edge along the guide structure of the input disc under the action of centrifugal force and / or magnetic attraction force and is clamped with the locking teeth of the output disc to drive the output disc to rotate synchronously, and power transmission is achieved. And when the rotating speed of the input disc is lower than that of the output disc, the locking blocks are separated from the locking teeth under the action of pulling force and / or electromagnetic repulsive force of the elastic pieces, and power transmission is cut off. The device has excellent reliability and power transmission effect.

Description

Technical Field

[0001] The present application relates to the field of power transmission devices, and particularly to a clutch. Background Art

[0002] As one of the power transmission devices, the clutch realizes effective control of the power transmission process by connecting or disconnecting the power transmission path. Its reliability, transmission efficiency, and smoothness are important performance indicators of the power transmission device.

[0003] Existing clutches include various structural forms such as axial friction type, axial embedding type, and centrifugal friction type. The axial friction type clutch transmits torque through an axially compressed friction structure, and its reliability and transmission efficiency depend on the friction structure. It is prone to slipping, jerks, and even failure due to overheating or wear of the friction structure. The axial embedding type clutch uses the axial mechanical engagement of the gear pair to achieve power transmission, and is prone to gear hitting and jerking phenomena, with poor smoothness and poor power transmission effect. In addition, the above two types of clutches need to use a hydraulic or electromagnetic system to generate a large driving force, with a complex structure, high manufacturing and maintenance costs.

[0004] The centrifugal friction type clutch uses the centrifugal force generated by the rotation of the input end to realize that the centrifugal block presses against the friction surface of the output end radially, and transmits torque through friction. Its transmission efficiency depends on the centrifugal force generated by the input end speed and the friction performance between the centrifugal block and the output end. It is prone to overload slipping and low transmission efficiency, and is suitable for working conditions with high speed and low torque. Therefore, how to improve the reliability, transmission efficiency, and smoothness of the clutch while reducing the manufacturing and maintenance costs is a technical problem to be solved. Summary of the Invention

[0005] The present application provides a clutch to solve at least one of the technical problems such as easy failure, poor power transmission effect, and high cost of existing clutches.

[0006] An embodiment of the present application provides a clutch, which includes: an input disk and an output disk;

[0007] The input disk includes opposite two sides; a structure for driving connection with a power component is arranged on the first side of the input disk, and a guiding structure for cooperating with a locking block is arranged radially on the second side; the locking block is arranged on the second side of the input disk through the guiding structure; one end of the locking block away from the edge of the input disk is connected to an elastic member;

[0008] A receiving cavity is arranged on one side of the output disk, and locking teeth protruding inward are arranged on the inner wall of the receiving cavity;

[0009] The second side of the input disk is opposite to and coaxially arranged with the output disk, and is rotatably placed in the receiving cavity;

[0010] When the input disk rotates under the action of an external force, the locking block can move radially towards the edge of the input disk under the action of centrifugal force and engage with the locking teeth of the output disk, thereby driving the output disk to rotate synchronously with the input disk to achieve power transmission; when the rotational speed of the input disk is lower than that of the output disk, the engagement between the locking block and the locking teeth of the output disk is released, and the power transmission is disconnected.

[0011] Optionally, a bevel surface with a preset angle is provided on the locking block; when the bevel surface contacts the locking teeth, a self-locking phenomenon is formed between the locking block and the locking teeth on the bevel surface, and the component force direction of the contact force received by the locking block is opposite to the elastic force direction of the elastic member, thereby enabling the locking block to engage with the locking teeth.

[0012] Optionally, the locking block and the locking teeth are set as a symmetric bidirectional engagement structure to achieve the power transmission of the bidirectional rotation of the input disk.

[0013] Optionally, the locking block includes a first locking block and a second locking block; the first locking block and the second locking block are connected by an elastic member.

[0014] Optionally, a stop block is provided at one end of the locking block close to the edge of the input disk; when the locking block is pulled away from the edge of the input disk by the elastic member, the stop block blocks the locking block at a preset docking position.

[0015] Optionally, the guiding structure is set as a guiding groove, and the locking block is placed inside the guiding groove.

[0016] Optionally, the locking teeth include opposite first locking teeth and second locking teeth.

[0017] The embodiment of the present application also provides a clutch, which includes: an input disk, an output disk, and an electromagnet;

[0018] The input disk includes two opposite sides; a structure for driving connection with a power component is provided on the first side of the input disk, and a guiding structure for cooperating with the locking block is provided along the radial direction on the second side; the locking block is arranged on the second side of the input disk through this guiding structure; one end of the locking block far from the edge of the input disk is connected to an elastic member; the locking block is set as a magnetic structure;

[0019] A receiving cavity is provided on one side of the output disk, and locking teeth protruding inwards are provided on the inner wall of the receiving cavity; an electromagnet with a convertible magnetic pole is arranged on the periphery of the output disk;

[0020] The second side of the input disk is opposite to and coaxially arranged with the output disk, and is rotatably placed in the receiving cavity;

[0021] When the input disk rotates under the action of an external force, the locking block can move radially towards the edge of the input disk under the action of centrifugal force and / or magnetic suction force, and engage with the locking teeth of the output disk, thereby driving the output disk to rotate synchronously with the input disk to achieve power transmission; when the rotational speed of the input disk is lower than that of the output disk, the engagement between the locking block and the locking teeth of the output disk is released, and the power transmission is disconnected.

[0022] Compared with the prior art, the present application has the following advantages:

[0023] 1) The structure is simple, and the manufacturing and maintenance costs are low. The locking block engages with the locking block of the output disk radially under the action of centrifugal force or / and magnetic suction force, without the need for a complex hydraulic system and a high-power electromagnetic system.

[0024] 2) It has high torque-carrying capacity, transmission efficiency, and reliability. During the power transmission process, the locking block engages with the locking teeth and self-locks, avoiding the problems of reduced transmission efficiency or failure caused by sliding wear.

[0025] 3) It has good smoothness. Under the constraint of the guiding structure of the input disk, the locking block enters the accommodating area of the output disk radially and engages smoothly with the locking teeth in the circumferential direction. Description of the Drawings

[0026] Figure 1 It is the first structural schematic diagram of a clutch provided by an embodiment of the present application.

[0027] Figure 2 It is the second structural schematic diagram of a clutch provided by an embodiment of the present application.

[0028] Figure 3 It is the third structural schematic diagram of a clutch provided by an embodiment of the present application.

[0029] Figure 4 It is the structural schematic diagram of a clutch provided by an embodiment of the present application when the locking block and the locking teeth are not engaged.

[0030] Figure 5 It is the structural schematic diagram of a clutch provided by an embodiment of the present application when the locking block and the locking teeth are engaged.

[0031] Figure 6 It is the first structural schematic diagram of a clutch provided by an embodiment of the present application provided with an electromagnet.

[0032] Figure 7 It is the second structural schematic diagram of a clutch provided by an embodiment of the present application provided with an electromagnet.

[0033] Reference Signs:

[0034] Input disk 10; guiding structure 11; locking block 12; first locking block 121; second locking block 122; elastic member 13; stop block 14; inclined surface 15;

[0035] Output disk 20; receiving cavity 21; locking teeth 22; first locking teeth 221; second locking teeth 222; docking surface 23;

[0036] Electromagnet 30. Specific embodiments

[0037] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0038] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present application.

[0039] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0040] The clutch provided in this embodiment is specifically as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 shown, Figure 1 is the first schematic structural view of a clutch provided by an embodiment of the present application, Figure 2 is the second schematic structural view of a clutch provided by an embodiment of the present application, Figure 3 is the third schematic structural view of a clutch provided by an embodiment of the present application, Figure 4 is the schematic structural view of a clutch provided by an embodiment of the present application when the locking block and the locking teeth are not engaged, Figure 5 is the schematic structural view of a clutch provided by an embodiment of the present application when the locking block and the locking teeth are engaged.

[0041] The clutch comprises an input disc 10 and an output disc 20 . The input disc 10 includes two opposite sides; a structure connected to the power member in transmission is arranged on the first side of the input disc 10, and a guide structure 11 matched with the locking block 12 is arranged radially on the second side; the locking block 12 is arranged on the second side of the input disc 10 through the guide structure 11; one end of the locking block 12 away from the edge of the input disc 10 is connected to the elastic member 13; an accommodating cavity 21 is arranged on one side of the output disc 20, and a locking tooth 22 protruding inward is arranged on the inner wall of the accommodating cavity 21; the second side of the input disc 10 is arranged opposite to and coaxially with the output disc 20, and is rotatably placed in the accommodating cavity 21; when the input disc 10 is rotated by external force, the locking block 12 can move radially toward the edge of the input disc 10 under the action of centrifugal force, and engage with the locking tooth 22 of the output disc 20, thereby driving the output disc 20 to rotate synchronously with the input disc 10 to realize power transmission; when the speed of the input disc 10 is lower than the speed of the output disc 20, the engagement between the locking block 12 and the locking tooth 22 is released, and the power transmission is disconnected. Furthermore, when the rotation speed of the input disc 10 is lower than the rotation speed of the output disc 20 and the elastic force of the elastic member 13 is greater than the centrifugal force of the locking block 12 , the locking block 12 is pulled back to the preset parking position by the elastic member 13 .

[0042] In the clutch, the input disc 10 refers to a component that is connected to the power member in transmission and receives the driving force of the power member. The input disc 10 can rotate when receiving the power of the power member. The output disc 20 is a structure that can be connected or disconnected with the input disc 10 to control the power output. When the output disc 20 is connected to the input disc 10, the output disc 20 rotates synchronously with the input disc 10, thereby transmitting the driving force of the power member to the next-level component, that is, the component that receives the power transmitted by the output disc 20. When the output disc 20 is disconnected from the input disc 10, the output disc 20 and the input disc 10 are separated from each other, and even if the input disc 10 rotates, the output disc 20 will not be affected, thereby disconnecting the power transmission path and disconnecting the power output process.

[0043] The first side of the input disc 10 is provided with a structure that is transmission-connected to the power member, and the structure can be set in many ways, such as a connection shaft, a connection hole, etc., or can be set to other feasible structures corresponding to different connection methods such as snap-fit, interference fit, etc., which are not limited here. Similarly, the output disc 20 is provided with a structure that is transmission-connected to the next-level component, and can be set similarly to the structure on the input disc 10, or can be set to a completely different transmission structure, which is not limited here.

[0044] The second side on the input tray 10 is the side opposite to the first side of the input tray 10 , that is, if the first side of the input tray 10 is regarded as the front side of the input tray 10 , then the second side on the input tray 10 is the back side of the input tray 10 .

[0045] The guiding structure 11 and the locking block 12 provided on the second side of the input disk 10 are cooperating structures, and one end of the locking block 12 away from the edge of the input disk 10 is connected by an elastic member 13, so that the locking block 12 is restricted by both the guiding structure 11 and the elastic member 13, so that the locking block 12 rotates synchronously around the rotation axis of the input disk 10 when the input disk 10 rotates, and moves towards the edge of the input disk 10 under the action of the centrifugal force generated during rotation, that is, moves in a direction away from the rotation axis of the input disk 10. Moreover, the locking block 12 is arranged radially, which means that the moving direction of the locking block 12 is perpendicular to the rotation axis of the input disk 10.

[0046] Corresponding to the structure of the input disk 10, a receiving cavity 21 is provided on the first side of the output disk 20, and the receiving cavity 21 is used to internally place the input disk 10. During installation, the second side of the input disk 10 is aligned with the receiving cavity 21 of the output disk 20, and then the output disk 20 is installed in the receiving cavity 21 of the input disk 10, and the guiding structure 11, the locking block 12 and the elastic member 13 are located between the input disk 10 and the output disk 20.

[0047] The inner wall of the receiving cavity 21 is provided with inwardly protruding locking teeth 22, and the locking teeth 22 are structures that cooperate with the locking block 12 and are used to lock the locking block 12, thereby realizing the connection between the input disk 10 and the output disk 20. Specifically, when the input disk 10 is not subjected to an external force, the input disk 10 and the output disk 20 are relatively stationary. At this time, the locking block 12 is located at a preset docking position under the action of the elastic member 13, and the input disk 10 and the output disk 20 are not connected.

[0048] When the input disk 10 rotates under the action of an external force, if the centrifugal force received by the locking block 12 is less than or equal to the elastic force of the elastic member 13, the locking block 12 will rotate synchronously with the input disk 10, and the input disk 10 and the output disk 20 will be separated from each other, that is, the input disk 10 and the output disk 20 are in a disconnected state, and the output disk 20 will not output power.

[0049] When the input disk 10 rotates under the action of an external force, if the centrifugal force received by the locking block 12 is greater than the elastic force of the elastic member 13, the locking block 12 will overcome the elastic force of the elastic member 13 under the action of the centrifugal force and move radially towards the edge of the input disk 10, that is, continuously move away from the rotation axis of the input disk 10 until it abuts against the inner wall of the receiving cavity 21. At the same time, the locking block 12 will be engaged with the locking teeth 22 during the rotation with the input disk 10, so that the input disk 10 and the output disk 20 are connected, and the output disk 20 is driven by the input disk 10 to rotate synchronously, and then output power.

[0050] When the output disk 20 is driven by the input disk 10 to rotate synchronously, if the rotation speed of the input disk 10 is not lower than that of the output disk 20, the locking block 12 will maintain the engagement with the locking teeth 22, so that the input disk 10 is always engaged with the locking teeth 22, and the connection state between the input disk 10 and the output disk 20 is maintained. If the rotation speed of the input disk 10 is lower than that of the output disk 20, the locking block 12 will disengage from the locking teeth 22, which will release the engagement between the locking block 12 and the locking teeth 22, disconnect the connection between the input disk 10 and the output disk 20, and thus disconnect the power transmission. Moreover, when the rotation speed of the input disk 10 is lower than that of the output disk 20 and the elastic force of the elastic member 13 is greater than the centrifugal force, the elastic member 13 will pull the locking block 12 back to the preset docking position.

[0051] In this clutch, the locking block 12 can be engaged with the locking teeth 22, and the engagement method can be either a fully embedded engagement or an abutting engagement. The locking block 12 and the locking teeth 22 can be provided with different specific structures according to their different engagement methods.

[0052] A feasible implementation is as Figure 1 、 Figure 2 、 Figure 4 and Figure 5 shown. The locking block 12 is provided with an inclined surface 15 at a preset angle; when the inclined surface 15 contacts the locking teeth 22, a self-locking phenomenon is formed between the locking block 12 and the locking teeth 22 on the inclined surface 15, and the component force direction of the contact force received by the locking block 12 is opposite to the elastic force direction of the elastic member 13, so that the locking block 12 is engaged with the locking teeth 22.

[0053] In this implementation, the inclined surface 15 on the locking block 12 forms a preset angle with the radial direction of the input disk 10. Correspondingly, a docking surface 23 is provided on the locking teeth 22 to dock with the inclined surface 15, and the docking surface 23 also forms a preset angle with the radial direction of the output disk 20. When the inclined surface 15 of the locking block 12 fits with the docking surface 23 of the locking teeth 22, a self-locking phenomenon is formed between the locking block 12 and the locking teeth 22 on the inclined surface 15, and the component force direction of the contact force received by the locking block 12 is opposite to the elastic force direction of the elastic member 13, so that the locking block 12 is engaged with the locking teeth 22. When the rotation speed of the input disk 10 is lower than that of the output disk 20, the inclined surface 15 and the docking surface 23 are smoothly separated, and the engagement between the locking block 12 and the locking teeth 22 is released. When the elastic force of the elastic member 13 is greater than the centrifugal force of the locking block 12, the locking block 12 will be pulled back to the preset docking position by the elastic member 13.

[0054] Specifically, when the inclined surface 15 of the locking block 12 moves to fit with the docking surface 23 under the action of centrifugal force, the line of action of the resultant force on the locking block 12 is within the friction angle, and the direction of a component force of the contact force is opposite to the elastic force direction of the elastic member 13. At this time, even if the centrifugal force of the locking block 12 is less than the elastic force of the elastic member 13, the elastic force of the elastic member 13 will be jointly offset by the centrifugal force and the component force of the contact force. As long as the rotation direction of the input disk 10 remains unchanged and the rotational speed of the input disk 10 is not less than the speed of the output disk 20, the inclined surface 15 will always fit with the docking surface 23, and the locking block 12 will not disengage from the locking teeth 22, and the two will continue to be engaged, so that the input disk 10 and the output disk 20 are always connected together. If you want to disconnect the connection between the input disk 10 and the output disk 20, just reduce the rotational speed of the input disk 10 so that the rotational speed of the input disk 10 is less than the rotational speed of the output disk 20. The input disk 10 will rotate in reverse relative to the output disk 20, and the locking block 12 will move away from the locking block. The inclined surface 15 of the locking block 12 will separate from the docking surface 23 of the locking teeth 22, and the centrifugal force received by the locking block 12 will also become smaller due to the reduction in rotational speed. When the centrifugal force received by the locking block 12 is less than the elastic force of the elastic member 13, the elastic member 13 will pull the locking block 12 back to the preset docking position.

[0055] In this embodiment, the structures of the locking block 12 and the locking teeth 22 are simple. The locking method and the unlocking method can be directly controlled by the rotational speed of the input disk 10, while taking into account the advantages of simple structure and high reliability, which is helpful for smooth power transmission.

[0056] It should be clear that one end of the locking block 12 far from the edge of the input disk 10 is connected to the elastic member 13, and the purpose is to enable the locking block 12 to move relative to the rotation axis of the input disk 10, that is, it can move away from the edge of the input disk 10 or approach the edge of the input disk 10 until it abuts against the inner wall of the receiving cavity 21 and engages with the locking teeth 22 of the output disk 20.

[0057] In this clutch, the locking block 12 can be set to one or multiple. A specific embodiment can be as Figure 4 and Figure 5 shown. The locking block 12 includes a first locking block 121 and a second locking block 122; the first locking block 121 and the second locking block 122 are connected by an elastic member 13; when the input disk 10 rotates under the action of an external force, the centrifugal forces received by the first locking block 121 and the second locking block 122 are in opposite directions.

[0058] In this embodiment, when the input disk 10 is not rotating, the elastic member 13 applies an elastic force between the first locking block 121 and the second locking block 122, and the directions of the elastic forces received by the first locking block 121 and the second locking block 122 are opposite, so that the first locking block 121 and the second locking block 122 are docked at a preset docking position. When the input disk 10 rotates, the directions of the centrifugal forces received by the first locking block 121 and the second locking block 122 are opposite. If the masses of the first locking block 121 and the second locking block 122 are the same, when the centrifugal force is greater than the elastic force, the first locking block 121 and the second locking block 122 will move towards the edge of the input disk 10 simultaneously. As long as any one of the first locking block 121 and the second locking block 122 is engaged with the locking teeth 22, the connection between the input disk 10 and the output disk 20 can be achieved. If the masses of the first locking block 121 and the second locking block 122 are different, the locking block with a larger mass is not only affected by its own centrifugal force but also by the centrifugal force of the locking block with a smaller mass, so that the locking block with a larger mass receives more pulling force, which can increase the rotational speed requirement of the input disk 10 for the locking block with a larger mass to move towards the edge of the input disk 10 while accelerating the pulling-back rate of the locking block when the rotational speed of the input disk 10 decreases.

[0059] In this clutch, multiple locking teeth 22 can also be provided, so that the locking block 12 can be engaged with the locking teeth 22 at a faster rate when the input disk 10 rotates. Moreover, the multiple locking teeth 22 can be evenly distributed on the inner wall of the receiving cavity or arranged at multiple specific positions, which is not limited herein. The use of multiple locking blocks 12 and locking teeth 22 can also increase the contact area and significantly improve the torque-carrying capacity of this clutch.

[0060] Exemplarily, a feasible embodiment can be as Figure 4 and Figure 5 shown. The locking teeth 22 include opposite first locking teeth 221 and second locking teeth 222; when the input disk 10 rotates under the action of an external force, the locking block 12 can move radially towards the edge of the input disk 10 under the action of centrifugal force and be engaged with the first locking teeth 221 or the second locking teeth 222 of the output disk 20. Moreover, the first locking teeth 221 and the second locking teeth 222 are preferably arranged opposite to each other at 180 degrees. Of course, they can also be arranged at other angles, which is not limited herein.

[0061] In addition, the locking teeth 22 and the locking block 12 can be set to a structure with bidirectional engagement, or they can be set to a structure with unidirectional engagement. Among them, the locking block 12 and the locking teeth 22 can be set to a symmetrical bidirectional engagement structure to achieve the power transmission of the input disk rotating in both directions. Exemplarily, two inclined surfaces 15 can be symmetrically arranged on the locking block 12, and two docking surfaces 23 can be symmetrically arranged on the locking teeth 22 correspondingly, so that when the input disk 10 rotates in both directions, the locking block 12 and the locking teeth 22 can always be engaged by the docking of the inclined surface 15 and the docking surface 23. Of course, other feasible structures can also be adopted to set the locking block 12 and the locking teeth 22 to a symmetrical bidirectional engagement structure, which is not limited here.

[0062] That is to say, when the locking teeth 22 and the locking block 12 are set to a structure with bidirectional engagement, no matter whether the input disk 10 rotates clockwise or counterclockwise, as long as the locking block 12 is thrown out from the preset docking position under the action of centrifugal force, the locking block 12 can be engaged with the locking teeth 22, so that the clutch can transmit power in both directions.

[0063] When the locking teeth 22 and the locking block 12 are set to a structure with unidirectional engagement, when the input disk 10 rotates in one direction, the locking block 12 can be engaged with the locking teeth 22, while when the locking teeth 22 rotate in the other direction, the locking block 12 cannot be engaged with the locking teeth 22, so that power can only be transmitted in one direction. Taking the example that the locking block 12 is provided with an inclined surface 15 at a preset angle, only a docking surface 23 that can be docked with the inclined surface 15 needs to be arranged on the locking teeth 22 along one rotation direction, so that the inclined surface 15 of the locking block 12 forms a self-locking phenomenon with the docking surface 23 only when the input disk 10 rotates clockwise to achieve engagement, or the inclined surface 15 of the locking block 12 forms a self-locking phenomenon with the docking surface 23 only when the input disk 10 rotates counterclockwise to achieve engagement.

[0064] In addition, in this kind of clutch, when the elastic force of the elastic member 13 is greater than the centrifugal force received by the locking block 12, the locking block 12 will dock at the preset docking position under the elastic force of the elastic member 13. In a specific implementation manner, a resisting structure can be arranged on the path where the locking block 12 is pulled by the elastic force of the elastic member 13, so that the locking block 12 is resisted when it reaches the preset docking position.

[0065] The resisting structure can be arranged on the locking block 12, or on the input disk 10, or on the output disk 20, as long as it can ensure that the locking block 12 stops moving when it moves to the preset docking position under the elastic force of the elastic member 13. There are many ways to arrange the resisting structure. For example, it can be set as a stop block 14, a butting post, a clamping groove, etc., which is not limited here.

[0066] Taking the setting of the blocking structure on the locking block 12 as an example, a feasible implementation is as follows Figure 1 and Figure 2 shown. At one end of the locking block 12 close to the edge of the input disk 10, a blocking block 14 is provided; when the locking block 12 is pulled away from the edge of the input disk 10 by the elastic member 13, the blocking block 14 blocks the locking block 12 at the preset docking position.

[0067] In addition, in this clutch, the locking block 12 and the guiding structure 11 cooperate with each other. The guiding structure 11 not only drives the locking block 12 to rotate when the input disk 10 rotates, but also provides a guiding function for the locking block 12 when the locking block 12 moves towards the edge of the input disk 10 under the action of centrifugal force.

[0068] There are many structural forms of the locking block 12 and the guiding structure 11. Exemplarily, the guiding structure 11 can be set as a guide rail, and then a sliding groove corresponding to the guide rail is provided on the locking block 12, so that the locking block 12 forms a partially embedded structure with the guide rail through the sliding groove, so that the locking block 12 slides under the guiding action of the guide rail. Or, the guiding structure 11 can also be set as a guiding groove, and the locking block 12 is placed inside the guiding groove, so that the locking block 12 slides under the guiding action of the guiding groove.

[0069] Furthermore, the structural form of the blocking structure can also be adaptively adjusted according to the different structural forms of the locking block 12 and the guiding structure 11. Exemplarily, when the guiding structure 11 is set as a guiding groove and the locking block 12 is placed inside the guiding groove, a blocking block 14 can be provided on the locking block 12, and the size of the blocking block 14 is made larger than the cross-sectional area of the guiding groove. When the locking block 12 moves to the preset docking position, the blocking block 14 is just blocked by the end of the guiding groove, so that the locking block 12 docks at the preset docking position.

[0070] The above first embodiment has introduced the clutch in detail. Corresponding to the first embodiment, in order to further improve the reaction rate of the locking block, improve the controllability and application range of the clutch, the second embodiment of the present application provides a clutch using an electromagnet to strengthen the control of the clutch by using magnetic attraction and magnetic repulsion.

[0071] A feasible implementation can be as follows Figure 6 and Figure 7 shown Figure 6 is the first structural schematic diagram of a clutch provided with an electromagnet according to an embodiment of the present application Figure 7 is the second structural schematic diagram of a clutch provided with an electromagnet according to an embodiment of the present application. This kind of clutch includes: an input disk 10, an output disk 20 and an electromagnet 30.

[0072] The input disk 10 includes opposite sides; a structure for driving connection with a power component is provided on the first side of the input disk 10, and a guiding structure 11 for cooperating with the locking block 12 is provided radially on the second side; the locking block 12 is arranged on the second side of the input disk 10 through the guiding structure 11; one end of the locking block 12 away from the edge of the input disk 10 is connected to an elastic member 13; the locking block 12 is arranged as a magnet structure.

[0073] A receiving cavity 21 is provided on one side of the output disk 20, and locking teeth 22 protruding inwards are provided on the inner wall of the receiving cavity 21; an electromagnet 30 with convertible magnetic poles is arranged around the output disk 20; the second side of the input disk 10 is opposite to and coaxially arranged with the output disk 20, and is rotatably placed in the receiving cavity 21; when the input disk 10 rotates under the action of an external force, the locking block 12 can move radially towards the edge of the input disk 10 under the action of centrifugal force and / or magnetic attraction force, and engage with the locking teeth 22 of the output disk 20, thereby driving the output disk 20 to rotate synchronously with the input disk 10 to achieve power transmission; when the rotational speed of the input disk 10 is lower than that of the output disk 20, the engagement between the locking block 12 and the locking teeth 22 of the output disk 20 is released, and the power transmission is disconnected. Moreover, when the rotational speed of the input disk 10 is lower than that of the output disk 20, the locking block 12 can return to a preset docking position under the action of centrifugal force and / or magnetic repulsion force.

[0074] Wherein, the locking block 12 is arranged as a magnet structure; an electromagnet 30 with convertible magnetic poles is arranged around the output disk 20. When a magnetic attraction force is generated between the electromagnet 30 and the locking block 12 and the input disk 10 rotates under the action of an external force, the locking block 12 can move radially towards the edge of the input disk 10 under the combined action of centrifugal force and magnetic attraction force, and engage with the locking teeth 22 of the output disk 20.

[0075] When the rotational speed of the input disk 10 is lower than that of the output disk 20, the engagement between the locking block 12 and the locking teeth 22 of the output disk 20 is released, and the power transmission is disconnected. At the same time, when the combined action of the elastic force of the elastic member 13 and the magnetic repulsion force is greater than the centrifugal force of the locking block 12, the locking block 12 can return to a preset docking position under the action of centrifugal force and magnetic repulsion force.

[0076] In this embodiment, the locking block 12 can be arranged as a magnet structure by means of local magnetization, so that the locking block 12 can generate magnetic attraction force or magnetic repulsion force with the energized electromagnet 30. When the electromagnet 30 arranged around the output disk 20 is energized, it has magnetism. When the input disk 10 rotates under the action of an external force, when the locking block 12 rotates with the input disk 10, it will simultaneously be subjected to the elastic force of the elastic member 13, centrifugal force, and magnetic force.

[0077] Specifically, when power transmission is not required, the electromagnet 30 does not need to be energized, and the power component does not need to transmit power to the input disk 10. Each structure of the clutch is in a static state, and the locking block 12 is located at a preset docking position.

[0078] To transmit power, just start the power component and keep the clutch in the connected state. At this time, by energizing the electromagnet 30 to make the polarity of the electromagnet 30 opposite to that of the locking block 12, a magnetic attraction force will be generated between the electromagnet 30 and the locking block 12. The magnetic attraction force received by the locking block 12 will be superimposed on the centrifugal force, thereby overcoming the elastic force of the elastic member 13 and enabling the locking block 12 to quickly engage with the locking teeth 22, thus realizing the connection between the input disk 10 and the output disk 20.

[0079] To disconnect the power transmission process, just turn off the power component and disconnect the clutch in the connected state. At this time, by energizing the electromagnet 30 to make the polarity of the electromagnet 30 the same as that of the locking block 12, a magnetic repulsion force will be generated between the electromagnet 30 and the locking block 12. The magnetic repulsion force received by the locking block 12 will be superimposed on the elastic force of the elastic member 13, thereby offsetting the centrifugal force received by the locking block 12 and enabling the locking block 12 to quickly disengage from the engagement with the locking teeth 22, thus disconnecting the connection between the input disk 10 and the output disk 20.

[0080] During the connection and disconnection process of this clutch, only when the magnetic attraction force or magnetic repulsion force of the electromagnet 30 is higher than the elastic force of the elastic member 13 can the flexible control of the locking block 12 be realized. Therefore, the electromagnet 30 can adopt a smaller size and power.

[0081] Furthermore, the number of the electromagnets 30 can be set to multiple as shown in Figure 6 and each electromagnet 30 can be evenly arranged around the periphery of the output disk 20. The models of each electromagnet 30 can be the same or different, and no specific limitation is made here.

[0082] In this implementation mode, the connection and disconnection of the clutch can be directly controlled by the electromagnet 30, or can be jointly controlled by the electromagnet 30 and the rotation speed of the input disk 10, which can meet the requirements in various scenarios. And due to the controllability of the electromagnet 30, its reliability is higher.

[0083] The further detailed structure of this clutch can be analogous to the detailed structure of the clutch in the first embodiment. For specific details, please refer to the relevant description of the first embodiment, and no redundant elaboration is made here.

[0084] It should be noted that although several structures, components or units for realizing related functions are mentioned in the above detailed description, this division is not mandatory. In fact, according to the specific implementation mode of the present application, the features and functions of the two or more structures, components or units described above can be embodied in one structure, component or unit. Conversely, the features and functions of one structure, component or unit described above can be further divided and embodied by multiple components, structures or units.

[0085] In addition, although the various components of the components or devices in the present application and the installation manners between the components are described in a specific order in the drawings, this does not require or imply that the components or devices must be designed in accordance with the specific components or the installation manners between the components, or that all the shown components must be included to achieve the desired results. Additionally or alternatively, some components may be omitted, multiple components may be combined into one component to achieve the corresponding functions, and / or one component may be decomposed into multiple components to achieve the corresponding functions, etc.

[0086] Although the present application is disclosed above with preferred embodiments, it is not intended to limit the present application. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present application. Therefore, the protection scope of the present application shall be subject to the scope defined by the claims of the present application.

Claims

1. A clutch, characterized in that: The clutch comprises: an input disc and an output disc; The input disc comprises two opposite sides; a first side of the input disc is provided with a structure drivingly connected to the power member, and a second side is provided with a guide structure cooperating with a locking block in a radial direction; the locking block is arranged on the second side of the input disc through the guide structure; an end of the locking block away from the edge of the input disc is connected to the elastic member; A receiving cavity is provided on one side of the output disk, and a locking tooth protruding inward is provided on the inner wall of the receiving cavity; The second side of the input disk is opposite to and coaxially disposed with the output disk and is rotatably placed in the accommodating cavity; When the input disc rotates under the action of external force, the locking block can move radially toward the edge of the input disc under the action of centrifugal force and engage with the locking teeth of the output disc, thereby driving the output disc and the input disc to rotate synchronously to achieve power transmission; when the rotation speed of the input disc is lower than that of the output disc, the engagement between the locking block and the locking teeth is released, disconnecting the power transmission.

2. The clutch according to claim 1, characterized in that: The locking block is provided with an inclined surface with a preset angle; when the inclined surface is in contact with the locking tooth, the locking block and the locking tooth form a self-locking phenomenon on the inclined surface, and the component direction of the contact force applied to the locking block is opposite to the elastic force direction of the elastic member, thereby causing the locking block to engage with the locking tooth.

3. The clutch according to claim 1, characterized in that: The locking block and the locking tooth are configured as a symmetrical bidirectional clamping structure to achieve bidirectional rotational power transmission of the input disc.

4. The clutch according to claim 1, characterized in that: The locking block includes a first locking block and a second locking block; the first locking block and the second locking block are connected via the elastic member.

5. The clutch according to claim 1, characterized in that: A stopper is provided at one end of the locking block close to the edge of the input disk; when the locking block is pulled away from the edge of the input disk by the elastic member, the stopper stops the locking block at a preset parking position.

6. The clutch according to claim 1, characterized in that: The guide structure is configured as a guide groove, and the locking block is built into the guide groove.

7. The clutch according to claim 1, characterized in that: The locking teeth include a first locking tooth and a second locking tooth that are opposite to each other.

8. A clutch, characterized in that: The clutch comprises: an input disc, an output disc and an electromagnet; The input disk comprises two opposite sides; a structure drivingly connected to the power member is disposed on the first side of the input disk, and a guide structure cooperating with the locking block is disposed radially on the second side of the input disk; the locking block is disposed on the second side of the input disk through the guide structure; an end of the locking block away from the edge of the input disk is connected to the elastic member; the locking block is configured as a magnetic structure; A receiving cavity is provided on one side of the output disk, and a locking tooth protruding inward is provided on the inner wall of the receiving cavity; the electromagnet with switchable magnetic poles is arranged on the periphery of the output disk; The second side of the input disk is opposite to and coaxially disposed with the output disk and is rotatably placed in the accommodating cavity; When the input disc rotates under the action of external force, the locking block can move radially toward the edge of the input disc under the action of centrifugal force and / or magnetic attraction, and engage with the locking teeth of the output disc, thereby driving the output disc and the input disc to rotate synchronously to achieve power transmission; when the rotation speed of the input disc is lower than the rotation speed of the output disc, the engagement between the locking block and the locking teeth of the output disc is released, disconnecting the power transmission.

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