Clutch holding device and electric actuator

Abstract

The invention discloses a clutch retaining device and an electric actuator, and relates to the technical field of actuators, the clutch retaining device comprises a first input part, a second input part, an output part and a sliding part which are coaxially arranged, and the clutch retaining device is axially connected between the first input part and the output part in a sliding mode and comprises a protruding part; two ends of the elastic part are respectively connected with the first input part and the sliding part; one end of the blocking part is matched with the protruding part; when the sliding part is located at a first axial position, the first input part is radially connected with the output part through the sliding part, and the second input part is not radially connected with the output part; when the sliding part is located at the second axial position, the second input part is radially connected with the output part, the first input part is not radially connected with the output part, and one end of the blocking part abuts against the protruding part to block the sliding part from sliding. The clutch device is simple in structure, clutch switching is convenient, operators can be prevented from being hurt or a clutch structure can be prevented from being damaged, and meanwhile manpower can be saved.

Description

Technical Field

[0001] This invention relates to the field of actuator technology, specifically to a clutch holding device and an electric actuator. Background Technology

[0002] An actuator is a device that receives control signals and converts them into mechanical motion (linear or rotary) using external energy (electricity, gas, or liquid) to drive equipment such as valves and dampers, ultimately achieving automatic control of industrial process parameters (flow rate, pressure, temperature, liquid level, etc.). Actuators typically have a built-in clutch mechanism, which is the core component for switching between two power source modes, and its design directly affects the safety and convenience of actuator operation.

[0003] A common type of clutch device typically includes a clutch lever or button, which has a complex structure. Switching between power source modes requires moving the clutch lever or pushing the button, making the operation cumbersome. Another type of clutch device, while lacking a clutch lever or button, requires the operator to first push a manual power component to engage the clutch. The operator then needs to continuously push and hold this component to operate it, which is time-consuming and labor-intensive. Furthermore, since the connection to the other power source is not disconnected at this time, if the other power source suddenly starts, the manual power component will be actuated, potentially injuring the operator or damaging the clutch mechanism. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a clutch holding device and an electric actuator, which has a simple structure, convenient clutch switching, can avoid injury to operators or damage to the clutch structure, and can save manpower.

[0005] The specific technical solution provided by this invention is as follows: In a first aspect, a clutch holding device is provided, comprising a first input portion, a second input portion, and an output portion coaxially arranged, the output portion being rotatably connected to the first input portion, and further comprising: A sliding portion, which is coaxially disposed with the first input portion and axially slidably connected between the first input portion and the output portion, and includes a protrusion; The elastic part has two ends connected to the first input part and the sliding part, respectively. The blocking part has one end that mates with the protruding part; By pushing the second input part, the sliding part is driven to slide axially from the first position to the second position. When the sliding part is in the first position, the first input part is radially connected to the output part through the sliding part, and the second input part is not radially connected to the output part. When the sliding part is in the second position, the second input part is radially connected to the output part, and the first input part is not radially connected to the output part. The elastic part is compressed and is located on opposite sides of the protrusion with one end of the blocking part. One end of the blocking part abuts against the protrusion to prevent the sliding part from sliding.

[0006] As a preferred embodiment of the above solution, the sliding part further includes a sliding sleeve, and the protrusion includes a first protrusion and a second protrusion. The first protrusion is formed on the outer wall of the sliding sleeve. The side of the first protrusion facing the elastic part has a first inclined part, and the side away from the elastic part has a first flat part. The second protrusion is formed on the first planar portion, and the second protrusion has a second inclined portion and a second planar portion, with the second inclined portion connecting the first planar portion and the second planar portion.

[0007] As a preferred embodiment of the above solution, when the sliding part is in the first position, the elastic part naturally extends and is located on one side of the first inclined surface together with one end of the blocking part. When the sliding part is in the second position, one end of the blocking part abuts against the first flat part or the second flat part.

[0008] As a preferred embodiment of the above solution, the clutch holding device further includes a housing, a second input part rotatably connected to the housing, and a blocking part including an elastic baffle, one end of which is fixed to the housing and the other end of which protrudes to engage.

[0009] As a preferred embodiment of the above solution, the first input part includes a first central through hole and a first internal spline disposed in the first central through hole, the outer wall of the sliding sleeve is formed with a first external spline and the inner wall is formed with a second central through hole, a second internal spline is formed in the second central through hole, and the output part includes a second external spline. When the sliding part is in the first position, the first internal spline is connected to the first external spline, and the second internal spline is connected to the second external spline; When the sliding part is in the second position, the first internal spline is connected to the first external spline, and the second internal spline is not connected to the second external spline.

[0010] As a preferred embodiment of the above solution, the first input part is sleeved on the output part and the sliding part through the first central through hole. An elastic part is provided in the first central through hole, and the two ends of the elastic part abut against the sliding part and the first input part respectively. The sliding part is sleeved on the output part through the second central through hole. The output part and the sliding part are located on one side of the second input part.

[0011] As a preferred embodiment of the above solution, one end of the output section is provided with a first mating part, and one end of the second input section is provided with a second mating part corresponding to the first mating part. The second mating part is located on one side of the sliding part. By axially moving the second input section, the second mating part pushes the sliding part to slide axially from the first position to the second position.

[0012] As a preferred embodiment of the above solution, when the sliding part is in the first position, the first mating part and the second mating part are separated, and when the sliding part is in the second position, the first mating part and the second mating part are connected.

[0013] As a preferred embodiment of the above solution, the first mating part includes a plurality of first protrusions distributed circumferentially along one end of the output part and a first slot formed between adjacent first protrusions, and the second mating part includes a plurality of second protrusions distributed circumferentially along one end of the second input part and a second slot formed between adjacent second protrusions. The second protrusion pushes the sliding part to slide axially from the first position to the second position. When the first mating part and the second mating part are connected, the first protrusion is inserted into the second slot, and the second protrusion is inserted into the first slot.

[0014] Secondly, an electric actuator is provided, including the clutch holding device as described above.

[0015] The present invention provides a coaxial first input part, a second input part, an output part, and a sliding part. When the sliding part is in the first position in the axial direction, the first input part 1 is radially connected to the output part through the sliding part. In this way, the first input part receives the rotational torque from the first power source and transmits the rotational torque to the output part for output. At the same time, the second input part is not radially connected to the output part, so as to avoid the rotational torque output from the second input part from injuring the operator. When the sliding part slides axially from the first position to the second position, the elastic part is compressed and stores elastic potential energy by the sliding part, and the sliding part is radially disconnected from the output part so that the first input part and the output part are not radially connected. When the sliding part is in the second axial position, the second input part and the output part are radially connected. In this way, the second input part receives the rotational torque from the second power source and transmits the rotational torque to the output part for output. At the same time, the first input part and the output part are not radially connected, which avoids the first input part from suddenly receiving the rotational torque from the first power source and transmitting the rotational torque to the second input part, thus preventing damage to the structure between the first input part and the output part. At the same time, when the second input part is a manual input part, it can avoid injury to the operator. Furthermore, when the sliding part is in the second axial position, the elastic part is compressed and one end of the blocking part is located on opposite sides of the protrusion. One end of the blocking part abuts against the protrusion to prevent the sliding part from sliding. In this way, the position of the sliding part can be maintained under the elastic force that resists the release of elastic potential energy by the elastic part, so as to ensure that the second input part and the output part are radially connected while the first input part and the output part are not radially connected. At the same time, when the second input part is a manual input part, it can avoid the operator from constantly pushing towards the sliding part and keep the second input part in this position, saving manpower. The present invention has a simple structure. The rotational torque from the first power source and the rotational torque from the second power source can be switched by axial sliding of the sliding part. At the same time, it can avoid the rotational torque from the first power source from being transmitted to the second input part, which could injure the operator or damage the clutch structure, and can save manpower. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the clutch holding device provided in an embodiment of the present invention; Figure 2 A cross-sectional view of the clutch holding device provided in an embodiment of the present invention when the sliding part is in the first position; Figure 3 A cross-sectional view of the clutch holding device provided in an embodiment of the present invention when the sliding part is in the second position; Figure 4 This is a schematic diagram of the sliding part provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the blocking part provided in an embodiment of the present invention.

[0018] The above figures include the following reference numerals: First input section 1; First central through hole 13; First internal spline 14; Second input section 2; Handwheel shaft 21; Handwheel 22; Second protrusion 23; Output section 3; Power output shaft 31; Second external spline 33; First protrusion 34; Sliding section 4; First external spline 41; Second central through hole 42; Second internal spline 43; Sliding sleeve 44; Protrusion 45; First protrusion 46; First inclined section 461; First flat section 462; Second protrusion 47; Second inclined section 471; Second flat section 472; Elastic section 5; Blocking section 6; Fixing section 61; Baffle section 62; Housing 7. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0020] It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as "connected to" another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "vertical," "horizontal," "left," "right," "upper," "lower," "inner," "outer," "bottom," etc., used in this specification indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] As described in the background section, an electric actuator is a drive device that converts electrical energy into mechanical motion. It is mainly used in automatic control systems to precisely operate industrial equipment such as valves, dampers, baffles, and gates, bringing them to specific positions (opening degrees). Electric actuators generally have a built-in clutch mechanism, which is the core component for switching between electric and manual modes. Its design directly affects the safety and convenience of operating the electric actuator.

[0022] In existing applications of electric actuators with emergency handwheels, a clutch device is required between the emergency handwheel and the actuator power source to prevent the handwheel from rotating with the actuator power during operation, which could lead to a safety accident.

[0023] One common type of clutch device requires a clutch handle or button. Rotating the handwheel necessitates moving the clutch handle or pushing the button, making the operation cumbersome and the device structure very complex. Another type of clutch device, while not requiring a clutch handle or button, requires first pushing the handwheel to one side to engage the clutch. The operator then needs to continuously push and hold the handwheel in that position while rotating it, which is time-consuming and laborious. Furthermore, since the electrical connection is not disconnected at this time, if the actuator's electrical power suddenly starts, the handwheel will rotate with the actuator's power, potentially injuring the operator or damaging the clutch mechanism.

[0024] The clutch holding device of the present invention has a simple structure and is easy to switch between two power source modes. It can avoid injury to the operator or damage to the clutch structure. When the power is manually input by handwheel, it can save manpower. At the same time, electric power drive takes priority. When electric power drive is used, the clutch structure automatically resets.

[0025] Example 1 This invention provides a clutch holding device, such as... Figure 1 As shown, it includes a first input section 1, a second input section 2, an output section 3, and a sliding section 4, all coaxially arranged, as well as an elastic section 5 and a blocking section 6. The first input section 1 is configured to receive rotational torque from a first power source. The first power source can be a non-human-powered power source such as an electric motor, pneumatic motor, hydraulic motor, internal combustion engine, or turbine. Figure 3 As shown, the first input part 1 may include a body part (not shown), on which a power input gear may be formed. The power input gear is fixedly connected to or integrally formed on one end of the body part. The power input gear can mesh with the drive gear on the motor shaft to receive rotational torque from the motor.

[0026] The second input unit 2 is configured to receive rotational torque from a second power source. The second power source can be a non-human-powered power source such as an electric motor, pneumatic motor, hydraulic motor, internal combustion engine, or turbine, or a human-powered power source such as a hand-crank mechanism (including handwheel 22) or a foot-operated drive mechanism. This embodiment uses a human-powered power source as an example. Figure 2 As shown, the second input unit 2 may include a handwheel shaft 21 and a handwheel 22, with one end of the handwheel shaft 21 fixedly connected to the handwheel 22.

[0027] The output unit 3 is rotatably connected to the first input unit 1 and disposed on one side of the second input unit 2, and is configured to output rotational torque from either the first power source or the second power source. The output unit 3 and the first input unit 1 can be axially fixed, such as... Figure 3As shown, the output unit 3 may include a power output shaft 31 and a power output gear (not shown). One end of the power output shaft 31 is fixedly connected to the power output gear or is integrally formed with the power output gear. The output unit 3 outputs power through the power output gear.

[0028] The sliding part 4 is coaxially arranged with the first input part 1 and axially slidably connected between the first input part 1 and the output part 3. The sliding part 4 is disposed on one side of the second input part 2, and the sliding part 4 slides axially between a first position and a second position. The first position is the position where the sliding part 4 is located when the first input part 1 receives rotational torque and transmits it to the output part 3 through the sliding part 4. In this embodiment, the first position is the position where the sliding part 4 is located when the first power source (electric power) inputs power. The second position is the position where the sliding part 4 is located when the second input part 2 receives rotational torque and transmits it to the output part 3. In this embodiment, the second position is the position where the sliding part 4 is located when the second power source (human power) inputs power.

[0029] The sliding portion 4 includes a sliding sleeve 44 and a protrusion 45. One end of the blocking portion 6 engages with the protrusion 45. The protrusion 45 includes a first protrusion 46 and a second protrusion 47. The first protrusion 46 is formed on the outer wall of the sliding sleeve 44. The side of the first protrusion 46 facing the elastic portion 5 has a first inclined portion 461, and the side facing away from the elastic portion 5 has a first flat portion 462. The first protrusion 46 may be annular. The second protrusion 47 is formed on the first flat portion 462. The second protrusion 47 has a second inclined portion 471 and a second flat portion 472. The second inclined portion 471 connects the first flat portion 462 and the second flat portion 472. The second protrusion 47 may be approximately triangular. The second inclined portion 471 may be formed on the opposite sidewall of the second protrusion 47. The end of the second protrusion 47 facing away from the sliding sleeve 44 may connect with the outer wall of the first protrusion 46. The second protrusion 47 can be one or more, and the multiple second protrusions 47 can be evenly distributed on the first flat portion 462. The first inclined portion 461 and the second inclined portion 471 can be arc-shaped inclined surfaces.

[0030] The two ends of the elastic part 5 are connected to the first input part 1 and the sliding part 4, respectively. The elastic part 5 can be a spring. One end of the blocking part 6 engages with the protrusion 45. The second inclined part 471 is provided so that when switching from the second power source to the first power source, the first power source drives the sliding sleeve 44 to rotate. During the rotation of the sliding sleeve 44, when one end of the blocking part 6 encounters the second inclined part 471, the second inclined part 471 can push the blocking part 6 open, thereby causing the blocking part 6 to lose its function of blocking the sliding part 4. The sliding part 4 then resets under the action of the elastic potential energy released by the elastic part 5. The second protrusion 47 is provided in multiple places so that the sliding sleeve 44 can push the blocking part 6 open more quickly when rotating, thereby accelerating the reset speed of the sliding part 4.

[0031] By pushing the second input part 2, the sliding part 4 is axially slid from the first position to the second position. When the sliding part 4 is in the first axial position, the first input part 1 is radially connected to the output part 3 through the sliding part 4, while the second input part 2 is not radially connected to the output part 3. One end of the blocking part 6 abuts against the sliding sleeve 44 at one end of the first inclined part 461. During the process of the second input part 2 pushing the sliding part 4 to slide axially from the first position to the second position, one end of the blocking part 6 slides over the first inclined part 461 and abuts against the first flat part 462 or the second flat part 472. When the sliding part 4 is in the second axial position, the second input part 2 is radially connected to the output part 3, while the first input part 1 is not radially connected to the output part 3. The elastic part 5 is compressed and located on opposite sides of the protrusion 45 with one end of the blocking part 6. One end of the blocking part 6 abuts against the first flat part 462 or the second flat part 472 to prevent the sliding part 4 from sliding under the action of the elastic potential energy released by the elastic part 5.

[0032] The first input section 1 includes a first central through hole 13 and a first internal spline 14 disposed in the first central through hole 13. The first central through hole 13 can be disposed within the main body section, and the first internal spline 14 is formed on the entire inner wall of the first central through hole 13. A first external spline 41 is formed at one end of the outer wall of the sliding sleeve 44, and a second central through hole 42 is formed on the inner wall. A protrusion 45 is spaced apart from the first external spline 41 on the outer wall of the sliding sleeve 44. A second internal spline 43 is formed within the second central through hole 42, and the output section 3 includes a second external spline 33. The first internal spline 14 and the first external spline 41 are always connected when the sliding section 4 is in either the first or second position. When the sliding section 4 is in the first position, the first internal spline 14 is connected to the first external spline 41, and the second internal spline 43 is connected to the second external spline 33. When the sliding section 4 is in the second position, the first internal spline 14 is connected to the first external spline 41, and the second internal spline 43 is not connected to the second external spline 33.

[0033] As a preferred embodiment of the above scheme, the first input part 1 is sleeved on the output part 3 and the sliding part 4 through the first central through hole 13. The first central through hole 13 is provided with an elastic part 5. The two ends of the elastic part 5 abut against the sliding part 4 and the first input part 1, respectively. The sliding part 4 is sleeved on the output part 3 through the second central through hole 42. The output part 3 and the sliding part 4 are disposed on one side of the second input part 2.

[0034] When the sliding part 4 is in the first position, the elastic part 5 naturally extends and is located on one side of the first inclined part 461 together with one end of the blocking part 6. When the sliding part 4 is in the second position, one end of the blocking part 6 abuts against the first flat part 462 or the second flat part 472.

[0035] The clutch holding device also includes a housing 7, to which the second input part 2 is rotatably connected. Specifically, the handwheel shaft 21 is rotatably mounted on the housing 7, with one end of the handwheel shaft 21 extending out of the housing 7 and fixedly connected to the handwheel 22. The blocking part 6 includes an elastic baffle, one end of which is fixed to the housing 7, and the other end protruding from the portion 45. The elastic baffle includes a fixing part 61 and a baffle part 62. The fixing part 61 can be L-shaped, and the baffle part 62 can be V-shaped. One end of the fixing part 61 is fixed to the housing 7, and the other end is fixedly connected to the baffle part 62. The end of the baffle part 62 away from the fixing part 61 engages with the protrusion 45.

[0036] As a preferred embodiment of the above solution, one end of the output section 3 is provided with a first mating part, and one end of the second input section 2 is provided with a second mating part corresponding to the first mating part. The second mating part is located on one side of the sliding section 4. Through the axial movement of the second input section 2, the second mating part pushes the sliding section 4 to slide axially from the first position to the second position. When the sliding section 4 is in the first position, the first mating part and the second mating part are separated; when the sliding section 4 is in the second position, the first mating part and the second mating part are connected. The second mating part can be located at the end of the handwheel shaft 21 away from the handwheel 22.

[0037] As a preferred embodiment of the above solution, the first mating part includes a plurality of first protrusions 34 circumferentially distributed along one end of the output part 3 and a first slot (not shown) formed between adjacent first protrusions 34. The second mating part includes a plurality of second protrusions 23 circumferentially distributed along one end of the second input part 2 and a second slot (not shown) formed between adjacent second protrusions 23. The second protrusions 23 push the sliding part 4 to slide axially from the first position to the second position, as shown. Figure 1 , Figure 3 As shown, when the first mating part and the second mating part are connected, the first protrusion 34 is inserted into the second slot, and the second protrusion 23 is inserted into the first slot. Figure 2 As shown, the first protrusion 34, the first slot, the second protrusion 23, and the second slot can each be set to three corresponding ones, and the first protrusion 34 and the first slot are evenly distributed circumferentially along one end of the output section 3, and the second protrusion 23 and the second slot are evenly distributed circumferentially along one end of the second input section 2.

[0038] When the clutch holding device of the present invention is in use, with the handwheel 22 not pushed towards the handwheel shaft 21, the sliding part 4 is in the first position under the elastic force of the naturally extended elastic part 5. At this time, the second external spline 33 and the first protrusion 34 are located in the second central through hole 42, and the second internal spline 43 is connected to the second external spline 33, and the first internal spline 14 is connected to the first external spline 41. One end of the blocking part 6 abuts against the sliding sleeve 44 at one end of the first inclined part 461. The power input gear and the main body rotate under the drive of the motor, thereby driving the power output shaft 31 and the power output gear to rotate, completing the power transmission of electric force.

[0039] When manual drive is required, push the handwheel 22 toward the handwheel shaft 21, causing the handwheel shaft 21 to move toward the sliding part 4. The outer edge of the second protrusion 23 contacts the end side wall of the sliding part 4, causing the sliding part 4 to slide axially toward the elastic part 5 and compress the elastic part 5. Before the first protrusion 34 extends out of the second central through hole 42, the first input part 1 and the output part 3 are disconnected radially. At this time, even if the electric power is running, only the first input part 1 will rotate or the first input part 1 will rotate together with the sliding part 4. The output part 3 and the second input part 2 will not rotate. Continue pushing the handwheel 22, and the second protrusion 23 begins to connect with the first protrusion 34. At this time, as the sliding part 4 slides, one end of the blocking part 6 slides over the first inclined part 461 and abuts against the first flat part 462 or the second flat part 472 to block and limit the sliding sleeve 44. Rotating the handwheel 22 can transmit the rotational torque to the handwheel shaft 21 and the output part 3, completing manual drive. At the same time, the blocking part 6 prevents the operator from continuously pushing towards the sliding part 4 and keeps the second input part 2 in this position, saving manpower. If the motor suddenly starts at this time, since the first input part 1 and the output part 3 are disconnected radially, the rotational torque will not be transmitted to the handwheel 22 through the power output shaft 31, ensuring the safety of the operator and also preventing damage to the spline or the sliding part 4 between the first input part 1 and the output part 3.

[0040] When manual drive is not required, the electric power is input through the first input part 1, which drives the sliding sleeve 44 to rotate. During the rotation of the sliding sleeve 44, one end of the blocking part 6 is pushed open by the second inclined part 471, thereby losing its function of locking the sliding part 4. The sliding part 4 is reset under the action of the elastic potential energy released by the elastic part 5. The sliding part 4 first pushes the handwheel shaft 21 open to disconnect the handwheel shaft 21 from the power output shaft 31, and then connects the first inner spline 14 with the second outer spline 33, realizing the automatic reset of the clutch structure, restoring the output of electric power, and ensuring the priority transmission of electric power.

[0041] This invention features a simple structure and low cost. Switching between drive from the first power source and drive from the second power source requires only a single axial sliding motion of the sliding part 4. The operation is simple, and it avoids the transmission of rotational torque from the first power source to the handwheel 22, which could injure the operator or damage the clutch mechanism. Furthermore, it saves manpower when the second power source is manually operated, and electric drive takes priority, automatically resetting the clutch mechanism during electric drive.

[0042] Example 2 The present invention provides an electric actuator, including a clutch holding device as described in Embodiment 1.

[0043] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the embodiments of the present invention.

[0044] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A clutch holding device, comprising a first input section (1), a second input section (2), and an output section (3) coaxially arranged, wherein the output section (3) is rotatably connected to the first input section (1), characterized in that, Also includes: The sliding part (4) is coaxially disposed with the first input part (1) and axially slidably connected between the first input part (1) and the output part (3), and includes a protrusion (45). The elastic part (5) has its two ends connected to the first input part (1) and the sliding part (4) respectively; The blocking part (6) has one end that engages with the protrusion (45); By pushing the second input part (2), the sliding part (4) is driven to slide axially from the first position to the second position. When the sliding part (4) is in the first position in the axial direction, the first input part (1) is radially connected to the output part (3) through the sliding part (4), and the second input part (2) is not radially connected to the output part (3). When the sliding part (4) is in the second position in the axial direction, the second input part (2) is radially connected to the output part (3), the first input part (1) is not radially connected to the output part (3), the elastic part (5) is compressed and one end of the blocking part (6) is located on opposite sides of the protrusion (45), and one end of the blocking part (6) abuts against the protrusion (45) to block the sliding part (4) from sliding.

2. The clutch holding device according to claim 1, characterized in that, The sliding part (4) further includes a sliding sleeve (44), and the protrusion (45) includes a first protrusion (46) and a second protrusion (47). The first protrusion (46) is formed on the outer wall of the sliding sleeve (44). The first protrusion (46) has a first inclined part (461) on the side facing the elastic part (5) and a first flat part (462) on the side away from the elastic part (5). The second protrusion (47) is formed on the first planar portion (462). The second protrusion (47) has a second inclined portion (471) and a second planar portion (472). The second inclined portion (471) is connected between the first planar portion (462) and the second planar portion (472).

3. The clutch holding device according to claim 2, characterized in that, When the sliding part (4) is in the first position, the elastic part (5) naturally extends and is located on one side of the first inclined part (461) together with one end of the blocking part (6); When the sliding part (4) is in the second position, one end of the blocking part (6) abuts against the first flat part (462) or the second flat part (472).

4. The clutch holding device according to claim 1, characterized in that, It also includes a housing (7), the second input part (2) is rotatably connected to the housing (7), and the blocking part (6) includes an elastic baffle, one end of which is fixed to the housing (7) and the other end of which is engaged with the protrusion (45).

5. The clutch holding device according to claim 2, characterized in that, The first input part (1) includes a first central through hole (13) and a first internal spline (14) disposed in the first central through hole (13). The outer wall of the sliding sleeve (44) is formed with a first external spline (41) and the inner wall is formed with a second central through hole (42). A second internal spline (43) is formed in the second central through hole (42). The output part (3) includes a second external spline (33). When the sliding part (4) is in the first position, the first inner spline (14) is connected to the first outer spline (41), and the second inner spline (43) is connected to the second outer spline (33); When the sliding part (4) is in the second position, the first internal spline (14) is connected to the first external spline (41), and the second internal spline (43) is not connected to the second external spline (33).

6. The clutch holding device according to claim 5, characterized in that, The first input part (1) is sleeved on the output part (3) and the sliding part (4) through the first central through hole (13). The elastic part (5) is provided in the first central through hole (13). The two ends of the elastic part (5) abut against the sliding part (4) and the first input part (1) respectively. The sliding part (4) is sleeved on the output part (3) through the second central through hole (42). The output part (3) and the sliding part (4) are disposed on one side of the second input part (2).

7. The clutch holding device according to claim 1, characterized in that, One end of the output part (3) is provided with a first mating part, and one end of the second input part (2) is provided with a second mating part corresponding to the first mating part. The second mating part is located on one side of the sliding part (4). Through the axial movement of the second input part (2), the second mating part pushes the sliding part (4) to slide axially from the first position to the second position.

8. The clutch holding device according to claim 7, characterized in that, When the sliding part (4) is in the first position, the first mating part is separated from the second mating part; when the sliding part (4) is in the second position, the first mating part is connected to the second mating part.

9. The clutch holding device according to claim 8, characterized in that, The first mating part includes a plurality of first protrusions (34) distributed circumferentially along one end of the output part (3) and a first slot formed between adjacent first protrusions (34); the second mating part includes a plurality of second protrusions (23) distributed circumferentially along one end of the second input part (2) and a second slot formed between adjacent second protrusions (23). The second protrusion (23) pushes the sliding part (4) to slide axially from the first position to the second position. When the first mating part is connected to the second mating part, the first protrusion (34) is inserted into the second slot, and the second protrusion (23) is inserted into the first slot.

10. An electric actuator, characterized in that, Includes the clutch holding device as described in any one of claims 1-9.

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