Clutch protection device and electric actuator

Abstract

The invention discloses a clutch protection device and an electric actuator, and relates to the technical field of executors.The clutch protection device comprises a first input part, a second input part, an output part and a sliding part which are coaxially arranged, and the sliding part is axially connected between the first input part and the output part in a sliding mode and comprises a protruding part; a first inclined plane part and a plane part are formed on the convex part; two ends of the elastic part are respectively connected with the first input part and the sliding part; the blocking part comprises a baffle; when the sliding part is located at a first axial position, the first input part is radially connected with the output part; the sliding part axially slides from the first position to the second position, the sliding part compresses the elastic part in the sliding process, and the baffle slides through the first inclined plane part; when the sliding part is located at the second axial position, the second input part is radially connected with the output part, and the baffle abuts against the plane part to prevent 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] The present application relates to the technical field of actuator motor, in particular to a clutch protection device and an electric actuator. BACKGROUND

[0002] An actuator refers to a device capable of receiving a control signal, converting it into mechanical movement (linear or rotary) using an external energy source (electricity, gas, liquid) to drive a valve, damper or other equipment, and ultimately to automatically control industrial process parameters (flow, pressure, temperature, liquid level, etc.). The actuator generally has a built-in clutch device, which is the core component of the two power source mode switching, and its design is directly related to the safety and convenience of the actuator operation.

[0003] A common clutch device generally has a clutch handle or button, which has a complex structure, and the power source mode needs to be switched by turning the clutch handle or pushing the button device, which is a cumbersome operation process. Another clutch device does not have a clutch handle or button, but the operator needs to push the manual power component first to connect the clutch device, and then needs to push and maintain the position of the manual power component to operate it, which is time-consuming and labor-intensive. Moreover, since the connection of the other power source is not cut off at this time, if the other power source suddenly starts, the manual power component will be driven to operate, which may injure the operator or damage the clutch structure. SUMMARY

[0004] To solve the above technical problems, the present application provides a clutch protection device and an electric actuator, which has a simple structure, convenient clutch switching, can avoid injuring the operator or damaging the clutch structure, and can save manpower.

[0005] The specific technical solutions provided by the present application are as follows: In a first aspect, a clutch protection device is provided, comprising a first input portion, a second input portion and an output portion arranged coaxially, the output portion being rotationally connected to the first input portion, and further comprising: a sliding portion arranged coaxially with the first input portion and axially connected between the first input portion and the output portion, and comprising a protruding portion having a first inclined surface portion and a flat surface portion formed thereon; a resilient portion having two ends connected to the first input portion and the sliding portion, respectively; a blocking portion comprising a baffle matched with the protruding portion; When the sliding portion is located at a first axial position, the first input portion is connected to the output portion radially through the sliding portion, the second input portion is not connected to the output portion radially, and the baffle is located between the resilient portion and the first inclined surface portion; The second input portion is pushed to drive the sliding portion to slide axially from the first position to a second position, and during the sliding process, the sliding portion compresses the resilient portion and the baffle slides over the first inclined surface portion; 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 the baffle abuts against the plane part to block the sliding of the sliding part.

[0006] As a preferred form of the above-mentioned solution, the sliding part further comprises a sliding sleeve, the protruding part is formed on the outer wall of the sliding sleeve, and a protruding portion is formed on the side wall of the sliding sleeve away from the protruding part; the blocking part further comprises a side plate connected with the baffle, the side plate corresponds to the protruding portion, and when the sliding sleeve rotates, the protruding portion can push open the side plate to make the baffle away from the plane part.

[0007] As a preferred form of the above-mentioned solution, the blocking part comprises a pair of oppositely arranged side plates and a pair of oppositely arranged baffles, the baffles are perpendicularly connected to one end of the side plates, a protruding portion is formed on the side wall of the sliding sleeve away from the protruding part, and an arc-shaped wall matched with the side plate is formed on the edge of the protruding portion.

[0008] As a preferred form of the above-mentioned solution, the protruding portion has a second inclined surface and a third inclined surface formed on the side wall away from the protruding portion, the second inclined surface is connected with the first inclined surface, the third inclined surface is connected with the plane part, when the sliding part slides, the baffle can slide through the second inclined surface, and when the protruding portion pushes open the side plate, the side plate can slide through the third inclined surface.

[0009] As a preferred form of the above-mentioned solution, when the sliding part is located at the second axial position, at least one baffle of the pair of baffles abuts against the plane part to block the sliding of the sliding part.

[0010] As a preferred form of the above-mentioned solution, further comprising a box body, the second input part is rotationally connected to the box body, the blocking part further comprises a fixed part fixed to the box body, the pair of side plates are connected to two ends of the fixed part, and the blocking part is an elastic member.

[0011] As a preferred form of the above-mentioned solution, the first input part comprises a first central through hole and a first internal spline arranged in the first central through hole, the outer wall of the sliding sleeve is formed with a first external spline, the inner wall is formed with a second central through hole, the second central through hole is formed with a second internal spline, and the output part comprises a second external spline; When the sliding part is located at the first position, the first internal spline is connected with the first external spline, and the second internal spline is connected with the second external spline; When the sliding part is located at the second position, the first internal spline is connected with the first external spline, and the second internal spline is not connected with the second external spline.

[0012] As a preferred form of the above-mentioned solution, the first input part is sleeved on the output part and the sliding part through the first central through hole, the first central through hole is provided with an elastic part, 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, and the output part and the sliding part are arranged on one side of the second input part.

[0013] As a preferred solution of the above scheme, one end of the output part is provided with a first matching part, one end of the second input part is provided with a second matching part corresponding to the first matching part, the second matching part is located on one side of the sliding part, and the second matching part pushes the sliding part to axially slide from the first position to the second position through the axial movement of the second input part.

[0014] In a second aspect, the application provides an electric actuator comprising the clutch protection device as above.

[0015] The application sets the coaxial first input part, second input part, output part and sliding part, when the sliding part is located at the axial first position, the first input part is radially connected with the output part through the sliding part, so that the first input part receives the rotating torque from the first power source and transmits the rotating torque to the output part for output, while the second input part is not radially connected with the output part, avoiding the rotating torque from the second input part to hurt the operator; When the sliding part is axially pushed from the first position to the second position, the elastic part is compressed by the sliding part to store elastic potential energy, and the baffle slides over the first inclined part, so that the sliding part is radially disconnected with the output part to make the first input part not radially connected with the output part; When the sliding part is located at the axial second position, the second input part is radially connected with the output part, so that the second input part receives the rotating torque from the second power source and transmits the rotating torque to the output part for output, while the first input part is not radially connected with the output part, avoiding the first input part to suddenly receive the rotating torque from the first power source and transmit the rotating torque to the second input part, preventing the damage to the structure between the first input part and the output part, and when the second input part is a manual input part, the operator can be avoided to always push the sliding part and keep the second input part at this position, saving manpower; When the sliding part is located at the axial second position, the elastic part is compressed and located on the opposite sides of the convex part with the baffle, and the baffle abuts against the flat part to block the sliding of the sliding part, so that the position of the sliding part can be kept under the action of the elastic force of the elastic part releasing the elastic potential energy, to ensure that the second input part is radially connected with the output part while the first input part is not radially connected with the output part, and when the second input part is a manual input part, the operator can be avoided to always push the sliding part and keep the second input part at this position, saving manpower; The application has simple structure, and only needs the axial sliding of the sliding part to switch the transmission of the rotating torque from the first power source and the rotating torque from the second power source, while the rotating torque from the first power source can be avoided to be transmitted to the second input part to hurt the operator or damage the clutch structure, and manpower can be saved. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiments description. Obviously, the drawings described below only show some of the embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor based on these drawings.

[0017] Figure 1 A structural schematic diagram of the clutch protection device provided by the embodiment of the present application is shown in the figure. Figure 2 A structural schematic diagram of one angle of the sliding part provided by the embodiment of the present application is shown in the figure. Figure 3 A structural schematic diagram of another angle of the sliding part provided by the embodiment of the present application is shown in the figure. Figure 4 A structural schematic diagram of one angle of the blocking part provided by the embodiment of the present application is shown in the figure. Figure 5 A structural schematic diagram of another angle of the blocking part provided by the embodiment of the present application is shown in the figure. Figure 6 A structural schematic diagram of the cross section of the clutch protection device provided by the embodiment of the present application when the sliding part is in the first position is shown in the figure. Figure 7 A structural schematic diagram of the cross section of the clutch protection device provided by the embodiment of the present application when the sliding part is in the second position is shown in the figure.

[0018] The above drawings include the following reference signs: First input part 1; first center through hole 13; first inner spline 14; second input part 2; hand wheel shaft 21; hand wheel 22; second protrusion 23; output part 3; power output shaft 31; second outer spline 33; first protrusion 34; sliding part 4; first outer spline 41; second center through hole 42; second inner spline 43; sliding sleeve 44; protruding part 45; first inclined surface part 451; flat surface part 452; protruding part 453; arc wall 454; second inclined surface part 455; third inclined surface part 456; elastic part 5; blocking part 6; baffle 61; arc notch 611; side plate 62; fixed part 63; second round corner 64; first round corner 65; box 7. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments only show some of the embodiments of the present application, and for those skilled in the art, all other embodiments obtained without creative labor based on these drawings also belong to the scope of protection of the present application.

[0020] It is to be understood that when an element such as a layer, region or substrate is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element or intervening elements can be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements present. It will be understood that, when a part is referred to as being "on" or "connected to" another part, it can be directly on or connected to the other part or one or more intervening parts can be present. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0021] As described in the background, electric actuator is a kind of drive device that converts electrical energy into mechanical motion, mainly used in automatic control system, accurately operating valves, dampers, baffles, gates and other industrial equipment to achieve a specific position (opening). Electric actuator generally has a built-in clutch device, which is the core component of electric / hand mode switching, and its design is directly related to the safety and convenience of electric actuator operation.

[0022] In the existing application of electric actuators with emergency handwheels, in order to prevent the handwheel from rotating with the actuator power and causing safety accidents, a clutch device needs to be set between the emergency handwheel and the actuator power.

[0023] One of the common clutch devices requires a clutch handle or button, which needs to be rotated when the handwheel is rotated. The operation process is cumbersome, and the device structure is also very complex. Another clutch device does not require a clutch handle or button, but it needs to be pushed to one side first to connect the clutch device, then the operator needs to keep pushing the handwheel and maintaining the position of the handwheel, and rotating the handwheel, which is time-consuming and laborious. Moreover, since the electric power is not disconnected at this time, if the actuator power suddenly starts at this time, the handwheel will rotate with the actuator power, which may injure the operator or damage the clutch structure.

[0024] The clutch protection device of the present application has a simple structure, convenient switching between two power sources, and can avoid injuring the operator or damaging the clutch structure. When the handwheel is manually powered, it can save manpower, and the electric power drive is preferred. The clutch structure is automatically reset when the electric power drive is driven.

[0025] Embodiment one The present application provides a kind of clutch protection device, such as Figure 1 , Figure 6 ,Figure 7 As shown, the device 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. The first input section 1 may include a body section (not shown), on which a power input gear may be formed. The power input gear is fixedly connected to or integrally formed at one end of the body section, and can mesh with a 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 1 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] like Figure 1 As shown, 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 the first power source or rotational torque from the second power source. The output unit 3 and the first input unit 1 can be axially fixed, such as... Figure 6 As 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] like Figure 1 , Figure 6 , Figure 7 As shown, 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] like Figure 2 , Figure 3The sliding part 4 includes a sliding sleeve 44 and a protruding part 45. The protruding part 45 is annularly formed on the outer wall of the sliding sleeve 44. The protruding part 45 is provided with a first inclined surface part 451 and a flat surface part 452. The protruding part 45 is provided with a protruding part 453 on the side wall away from the sliding sleeve 44. The elastic part 5 is connected to the first input part 1 and the sliding part 4 respectively. The elastic part 5 can be a spring.

[0030] As shown in Figure 4 , Figure 5 The blocking part 6 includes a baffle 61 matched with the protruding part 45 and a side plate 62 connected to the baffle 61. The side plate 62 corresponds to the protruding part 453. When the sliding sleeve 44 rotates, the protruding part 453 can push the side plate 62 to make the baffle 61 away from the flat surface part 452. The blocking part 6 includes a pair of opposite side plates 62 and a pair of opposite baffles 61. The baffle 61 is vertically connected to one end of the side plate 62. The connection between the baffle 61 and the side plate 62 forms a first round corner 65. The cross-section of the outer wall of the sliding sleeve 44 is circular. The baffle 61 is provided with an arc-shaped notch 611 corresponding to the outer wall of the sliding sleeve 44. Figure 1 The clutch protection device further includes a box 7. The second input part 2 is rotationally connected to the box 7. The blocking part 6 further includes a fixed part 63 fixed to the box 7. A pair of side plates 62 are connected to both ends of the fixed part 63. The blocking part 6 is an elastic member. When the sliding sleeve 44 rotates and the protruding part 453 pushes the side plate 62 and the baffle 61, the blocking part 6 is elastically expanded. The two ends of the fixed part 63 connected to the side plate 62 are provided with a second round corner 64, which facilitates the expansion of the blocking part 6. After the expansion, the blocking part 6 will slowly deform and return to the original state.

[0031] As shown in Figure 6 When the sliding part 4 is located at the first axial position, the first input part 1 is radially connected to the output part 3 through the sliding part 4. The second input part 2 is not radially connected to the output part 3. The baffle 61 is located between the elastic part 5 and the first inclined surface part 451. By pushing the second input part 2, the sliding part 4 is axially slid from the first position to the second position. During the sliding process, the sliding part 4 compresses the elastic part 5 and the baffle 61 slides over the first inclined surface part 451. Figure 7 When the sliding part 4 is located at the second axial position, 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. At least one baffle 61 of the pair of baffles 61 abuts against the flat surface part 452 to block the sliding of the sliding part 4.

[0032] In this embodiment, as shown in Figure 2 , Figure 3As shown, the protruding part 45 is provided with a protruding part 453 on the side wall away from the sliding sleeve 44, and the edge of the protruding part 453 is provided with an arc wall 454 matched with the side plate 62. The side wall away from the protruding part 453 is provided with a second inclined part 455 and a third inclined part 456, the second inclined part 455 is connected with the first inclined part 451, the third inclined part 456 is connected with the flat part 452, the first inclined part 451 and the second inclined part 455 face the elastic part 5, and the flat part 452 and the third inclined part 456 are away from the elastic part 5. When the sliding part 4 slides, the baffle 61 can slide through the second inclined part 455, and when the protruding part 453 pushes the side plate 62, the side plate 62 can slide through the third inclined part 456.

[0033] As shown in Figure 6 , Figure 7 , the first input part 1 includes a first center through hole 13 and a first inner spline 14 arranged in the first center through hole 13, the first center through hole 13 can be arranged in the body part, and the first inner spline 14 is formed on the entire inner wall of the first center through hole 13. The outer wall of the sliding sleeve 44 is provided with a first outer spline 41, the inner wall is provided with a second center through hole 42, and the protruding part 45 is arranged between the outer wall of the sliding sleeve 44 and the first outer spline 41. The second center through hole 42 is provided with a second inner spline 43, and the output part 3 includes a second outer spline 33. The first inner spline 14 and the first outer spline 41 are always connected when the sliding part 4 is in the first position or the second position. When the sliding part 4 is in the first position, the first inner spline 14 is connected with the first outer spline 41, and the second inner spline 43 is connected with the second outer spline 33. When the sliding part 4 is in the second position, the first inner spline 14 is connected with the first outer spline 41, and the second inner spline 43 is not connected with the second outer spline 33.

[0034] As shown in Figure 6 , Figure 7 , the first input part 1 is sleeved on the output part 3 and the sliding part 4 through the first center through hole 13, the first center through hole 13 is provided with the 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 center through hole 42, and the output part 3 and the sliding part 4 are arranged on one side of the second input part 2.

[0035] As shown in Figure 1 , Figure 6 , Figure 7As shown, one end of the output part 3 is provided with a first matching part, one end of the second input part 2 is provided with a second matching part corresponding to the first matching part, the second matching part is located on one side of the sliding part 4, and the second matching part pushes the sliding part 4 to slide axially from the first position to the second position through the axial movement of the second input part 2. When the sliding part 4 is located at the first position, the first matching part is separated from the second matching part, and when the sliding part 4 is located at the second position, the first matching part is connected with the second matching part. The second matching part can be provided at the end of the hand wheel shaft 21 away from the hand wheel 22.

[0036] The first matching part includes a plurality of first protrusions 34 distributed circumferentially at one end of the output part 3 and a first slot (not shown) formed between adjacent first protrusions 34, and the second matching part includes a plurality of second protrusions 23 distributed circumferentially at 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 in Figure 1 、 Figure 3 When the first matching part is connected with the second matching part, the first protrusions 34 are inserted into the second slots, and the second protrusions 23 are inserted into the first slots, as shown in Figure 5 、 Figure 6 As shown, the first protrusions 34, the first slots, the second protrusions 23, and the second slots can each be provided with three corresponding ones, and the first protrusions 34 and the first slots are uniformly distributed circumferentially at one end of the output part 3, and the second protrusions 23 and the second slots are uniformly distributed circumferentially at one end of the second input part 2.

[0037] When the clutch protection device of the application is used, in the state that the hand wheel 22 does not push the hand wheel shaft 21, the sliding part 4 is in the first position under the elastic force of the natural extension of the elastic part 5, at this time, the second external spline 33 and the first protrusion 34 are located in the second center through hole 42, the first protrusion 34 is not connected with the second protrusion 23, the second internal spline 43 is connected with the second external spline 33, the first internal spline 14 is connected with the first external spline 41, the side plate 62 and the baffle 61 are located between the elastic part 5 and the first inclined surface part 451, and the arc-shaped notch 611 of the baffle 61 is wrapped on the outer wall of the sliding sleeve 44. The power input gear and the body part are rotated under the driving of the motor, thereby driving the power output shaft 31 and the power output gear to rotate, and completing the power transmission of the electric power.

[0038] When manual driving is needed, the hand wheel 22 is pushed to the side of the hand wheel shaft 21, driving the hand wheel shaft 21 to move to the sliding part 4, the outer edge of the second protrusion 23 contacts the end wall of the sliding part 4, driving the sliding part 4 to slide axially to the side of the elastic part 5 and compressing the elastic part 5, before the first protrusion 34 extends out of the second center through hole 42, the second inner spline 43 is disconnected from the second outer spline 33, thereby disconnecting the radial connection between the first input part 1 and the output part 3, at this time, even if the electric power is running, only the first input part 1 rotates with the sliding part 4, and the output part 3 and the second input part 2 do not rotate.

[0039] Continue to push the hand wheel 22 to slide the sliding part 4, the baffle 61 contacts and slides through the first inclined surface part 451, at this time, if the baffle 61 does not encounter the protruding part 453, then a pair of baffles 61 only slide through the first inclined surface part 451 and then abut against the flat surface part 452 to block the sliding of the sliding part 4; if one of the baffles 61 encounters the protruding part 453, then this baffle 61 slides through the first inclined surface part 451 and the second inclined surface part 455 and the protruding part 453, since the baffle 61 is pushed away by the protruding part 453, it will contact the third inclined surface part 456 after sliding through the protruding part 453 and will not abut against the flat surface part 452, while the baffle 61 on the other side slides through the first inclined surface part 451 and abuts against the flat surface part 452, ensuring the blocking of the sliding part 4. At the same time when the baffle 61 abuts against the flat surface part 452, the second protrusion 23 begins to connect with the first protrusion 34, at this time, rotating the hand wheel 22 can transmit the rotary torque to the hand wheel shaft 21 and the output part 3, completing the manual driving, and at the same time, the blocking of the sliding sleeve 44 by the baffle 61 can avoid the operator from continuously pushing to the side of the sliding part 4 and keeping the second input part 2 in this position, saving manpower. If the motor starts suddenly at this time, since the radial connection between the first input part 1 and the output part 3 is disconnected, the rotary torque will not be transmitted to the hand wheel 22 through the power output shaft 31, ensuring the safety of the operator, and also avoiding the damage of the spline between the first input part 1 and the output part 3 or the sliding part 4.

[0040] When manual driving is not needed, the electric power is input through the first input part 1 to drive the sliding sleeve 44 to rotate. Before the sliding sleeve 44 rotates, if the pair of baffles 61 abut against the flat part 452, the convex part 453 will first push away the pair of side plates 62 and the pair of baffles 61 in turn when the sliding sleeve 44 pushes away one side plate 62, the third inclined part 456 of the sliding part 4 slides through the corresponding baffle 61 under the action of the elastic part 5 releasing the elastic potential energy, and the sliding part 4 loses the blocking and resets. If only one baffle 61 abuts against the flat part 452, the sliding sleeve 44 rotates to push away the baffle 61, and then the third inclined part 456 slides through the corresponding baffle 61, and the sliding part 4 loses the blocking and resets. The blocking part 6 is between the elastic part 5 and the first inclined part 451 after passing the sliding part 4, and slowly deforms to return to the original state, that is, the arc-shaped notch 611 of the baffle 61 wraps the outer wall of the sliding sleeve 44. When the sliding part 4 resets, the hand wheel shaft 21 is first pushed away to disconnect the hand wheel shaft 21 and the power output shaft 31, and then the first inner spline 14 is connected with the second outer spline 33, so as to realize the automatic reset of the clutch structure, restore the output of the electric power, and ensure the priority transmission of the electric power.

[0041] It is worth noting that, compared with setting the convex part 453 on the opposite sides of the convex part 45 or setting only one convex part 453, one baffle 61 and one side plate 62, the redundant design of the pair of baffles 61, the pair of side plates 62 and the convex part 453 can prevent the sliding part 4 from resetting under the action of the elastic force of the elastic part 5 when one side baffle 61 contacts the third inclined part 456 and does not abut against the flat part 452, so as to ensure the clutch function. Specifically, if a pair of convex parts 453 corresponding to a pair of side plates 62 or a pair of baffles 61 are arranged on the opposite sides of the convex part 45, when the hand wheel shaft 21 is pushed, if the pair of convex parts 453 meet the pair of baffles 61 at the same time, the pair of baffles 61 slide through the first inclined part 451 and the second inclined part 455 and then contact the third inclined part 456 without abutting against the flat part 452, so that the sliding part 4 will reset under the action of the elastic force of the elastic part 5 when the operator does not push the hand wheel shaft 21, resulting in clutch failure. If only one convex part 453, one baffle 61 and one side plate 62 are arranged, when the hand wheel shaft 21 is pushed, when the convex part 453 meets the baffle 61, the baffle 61 slides through the first inclined part 451 and the second inclined part 455 and then contacts the third inclined part 456 without abutting against the flat part 452, so that the sliding part 4 will reset under the action of the elastic force of the elastic part 5 when the operator does not push the hand wheel shaft 21, resulting in clutch failure.

[0042] The present application has simple structure, and can switch the transmission of the rotation torque from the first power source and the rotation torque from the second power source by the axial sliding of the sliding part 4, and can avoid the rotation torque from the first power source from being transmitted to the second input part 2 to hurt the operator or damage the clutch structure, and can save the manpower when the second power source is the manpower source, and the electric power driving is prior, and the clutch structure is automatically reset when the electric power driving, and can ensure the clutch function and avoid the clutch failure.

[0043] Example two The present application provides an electric actuator comprising the clutch protection device of example one.

[0044] Although preferred embodiments in the embodiments of the present application have been described, those skilled in the art can make further changes and modifications to these embodiments once they know the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the embodiments of the present application.

[0045] Obviously, various modifications and changes can be made to the present application by those skilled in the art without departing from the spirit and scope of the present application. Thus, it is intended that the present application embrace all such modifications and changes and include them within the scope of the present application claims and their equivalents.

Claims

1. A clutch protection device, comprising coaxially arranged first input part (1), second input part (2), output part (3), the output part (3) is rotatably connected to the first input part (1), characterized in that, Also comprising: a sliding part (4) coaxially arranged with the first input part (1) and axially slidingly connected between the first input part (1) and the output part (3), and comprising a protruding part (45) with a first inclined surface part (451) and a flat surface part (452) formed thereon; a resilient part (5) with two ends respectively connected with the first input part (1) and the sliding part (4); a blocking part (6) comprising a baffle (61) matched with the protruding part (45); when the sliding part (4) is at an axial first position, the first input part (1) is radially connected with the output part (3) through the sliding part (4), the second input part (2) is not radially connected with the output part (3), and the baffle (61) is located between the resilient part (5) and the first inclined surface part (451); by pushing the second input part (2) to drive the sliding part (4) to axially slide from the first position to a second position, and in the sliding process, the sliding part (4) compresses the resilient part (5), and the baffle (61) slides over the first inclined surface part (451); when the sliding part (4) is at an axial second position, the second input part (2) is radially connected with the output part (3), the first input part (1) is not radially connected with the output part (3), and the baffle (61) abuts against the flat surface part (452) to block the sliding of the sliding part (4).

2. The clutch protection device according to claim 1, characterized in that The sliding part (4) further comprises a sliding sleeve (44), the protruding part (45) is formed on the outer wall of the sliding sleeve (44), and a protruding part (453) is formed on the side wall of the protruding part (45) away from the sliding sleeve (44); the blocking part (6) further comprises a side plate (62) connected with the baffle (61), the side plate (62) corresponds to the protruding part (453), and when the sliding sleeve (44) rotates, the protruding part (453) can push open the side plate (62) to make the baffle (61) away from the flat surface part (452).

3. The clutch protection device according to claim 2, characterized in that The blocking part (6) comprises a pair of oppositely arranged side plates (62) and a pair of oppositely arranged baffles (61), the baffle (61) is perpendicularly connected to one end of the side plate (62), the protruding part (45) away from the side wall of the sliding sleeve (44) is formed with a protruding part (453), and the edge of the protruding part (453) is formed with an arc-shaped wall (454) matched with the side plate (62).

4. The clutch protection device according to claim 2 or 3, characterized in that The side wall of the protruding part (453) away from each other is formed with a second inclined surface part (455) and a third inclined surface part (456), the second inclined surface part (455) is connected with the first inclined surface part (451), the third inclined surface part (456) is connected with the flat surface part (452), when the sliding part (4) slides, the baffle (61) can slide over the second inclined surface part (455), and when the protruding part (453) pushes open the side plate (62), the side plate (62) can slide over the third inclined surface part (456).

5. The clutch protection device according to claim 3, wherein When the sliding part (4) is located at the second axial position, at least one of the pair of baffles (61) abuts against the flat part (452) to block the sliding of the sliding part (4).

6. The clutch protection device according to claim 3, wherein The second input part (2) is rotationally connected to a box body (7), the blocking part (6) further comprises a fixed part (63) fixed to the box body (7), and the pair of side plates (62) are connected to two ends of the fixed part (63), and the blocking part (6) is an elastic member.

7. The clutch protection device of claim 1, wherein The first input part (1) comprises a first central through hole (13) and a first inner spline (14) arranged in the first central through hole (13), the outer wall of the sliding sleeve (44) is formed with a first outer spline (41), the inner wall is formed with a second central through hole (42), the second central through hole (42) is formed with a second inner spline (43), and the output part (3) comprises a second outer spline (33); When the sliding part (4) is located at the first position, the first inner spline (14) is connected with the first outer spline (41), and the second inner spline (43) is connected with the second outer spline (33); When the sliding part (4) is located at the second position, the first inner spline (14) is connected with the first outer spline (41), and the second inner spline (43) is not connected with the second outer spline (33).

8. The clutch protection device according to claim 7, 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 arranged in the first central through hole (13), 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), and the output part (3) and the sliding part (4) are arranged on one side of the second input part (2).

9. The clutch guard of claim 1, wherein, One end of the output part (3) is provided with a first matching part, one end of the second input part (2) is provided with a second matching part corresponding to the first matching part, the second matching part is located on one side of the sliding part (4), and the second matching part pushes the sliding part (4) to slide axially from the first position to the second position through the axial movement of the second input part (2).

10. An electric actuator, characterized by The clutch protection device comprises the clutch protection device according to any one of claims 1-9.

Images