Electric actuator and valve

Abstract

The application discloses a novel technical scheme of an electric actuator and a valve, and the electric actuator comprises a supporting assembly, a main shaft assembly and a feedback setting mechanism, wherein the feedback setting mechanism comprises: a trigger switch, the supporting assembly is used for supporting the trigger switch; a connecting part, the connecting part is connected to the main shaft assembly and can rotate synchronously with the main shaft assembly; a trigger piece, the trigger piece is rotatably connected to the connecting part and can be matched to a follow rotation condition and an adjustment condition, and the trigger piece can be matched to an initial feedback position with the trigger switch; when the connecting part and the trigger piece are matched to the follow rotation condition, the trigger piece and the connecting part can rotate synchronously with the main shaft assembly, the trigger piece rotates relative to the trigger switch and deviates from the initial feedback position; when the connecting part and the trigger piece are matched to the adjustment condition, the trigger piece can rotate relative to the connecting part to be matched to the initial feedback position with the trigger switch again.

Description

Technical Field

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

[0002] In the field of valve technology, electric actuators are often used to drive valves to open, close, or reach a set opening degree. However, existing valves cannot memorize the set opening degree, so when a valve needs to reproduce a certain opening degree, it needs to be readjusted.

[0003] In view of this, there is an urgent need to provide a way for actuators to memorize the set opening degree of valves. Summary of the Invention

[0004] One object of the present invention is to provide a new technical solution for an electric actuator and valve, which enables the actuator to memorize the valve opening degree by improving the structure of the actuator.

[0005] On one hand, an electric actuator is provided, comprising a support assembly, a spindle assembly, and a feedback setting mechanism. The feedback setting mechanism includes: a trigger switch, supported by the support assembly; a connecting portion connected to the spindle assembly and capable of rotating synchronously with the spindle assembly; and a trigger element rotatably connected to the connecting portion and capable of engaging in a follow-up operation and an adjustment operation. The trigger element engages with the trigger switch at an initial feedback position. When the connecting portion and the trigger element engage in the follow-up operation, both the trigger element and the connecting portion rotate synchronously with the spindle assembly, and the trigger element rotates relative to the trigger switch and deviates from the initial feedback position. When the connecting portion and the trigger element engage in the adjustment operation, the trigger element rotates relative to the connecting portion to re-engage with the trigger switch at the initial feedback position.

[0006] By employing the technical solution of this invention, when the valve is in the closed state, the spindle assembly rotates along a first direction under the action of the power input assembly to open the valve to a set angle. The trigger and the connecting part cooperate in the rotational operation. Driven by the connecting part, the trigger rotates together with the spindle assembly, and the trigger deviates from the initial feedback position.

[0007] When the trigger and the connecting part are engaged in the adjustment condition, the spindle assembly and the connecting part no longer rotate. The spindle assembly maintains a constant rotation angle, and the valve maintains the corresponding opening angle. The trigger is rotated independently to align it with the trigger switch in the initial feedback position, thereby memorizing the rotation angle of the spindle assembly and thus the valve opening angle.

[0008] When the spindle assembly rotates again in the first direction to the set angle, the trigger element and the trigger switch sense each other, and the trigger switch begins to generate feedback. This allows adjustment of the angle at which the trigger element and triggering device begin to generate feedback, thereby enabling the memorization of the valve opening.

[0009] Optionally, the trigger includes a main body and a trigger end disposed on the main body, wherein the trigger end and the trigger switch form a point sensing or line sensing to cooperate with the initial feedback position;

[0010] When the trigger terminal and the trigger switch are in line sensing state, the endpoint on one side of the trigger terminal is located at the initial feedback position.

[0011] Optionally, the spindle assembly is capable of rotating within a set rotation angle α;

[0012] When the trigger end and the trigger protrusion form a linear induction, the center angle of the trigger end is γ, where α≤γ<360°.

[0013] Optionally, the trigger further includes a limiting ring disposed on the outside of the main body portion, wherein the main body portion of the trigger is built into the connecting portion, and the limiting ring is sleeved on the outside of the connecting portion.

[0014] Optionally, the limiting ring includes a second ring segment, the second ring segment being elastic, a portion of the second ring segment being spaced apart from the outer wall of the connecting portion, and a portion abutting against the outer wall of the connecting portion.

[0015] Optionally, a plurality of limiting protrusions are provided at the position where the second ring segment abuts against the outer wall of the connecting part, and the connecting part is provided with mating protrusions that can engage with the limiting protrusions.

[0016] Optionally, the middle part of the second ring segment abuts against the connecting part, and the abutting part is radially symmetrically arranged with the trigger end at the midpoint of the circumferential direction.

[0017] Optionally, the actuator further includes a housing, and the feedback setting mechanism is disposed within the housing;

[0018] The trigger includes two ends arranged opposite each other along the axial direction. One of the ends extends out of the housing and is provided with a first pointer. A second pointer is also provided on the housing. When the first pointer and the second pointer are aligned, the trigger and the trigger switch are located in the initial feedback position.

[0019] Optionally, an inner cavity is provided on the housing, and the end of the trigger extends out of the housing from the bottom of the inner cavity;

[0020] The opening of the inner cavity is provided with an operable cover, and the cover is sealed to the edge of the opening of the inner cavity by a sealing ring.

[0021] In another aspect, a valve is provided that includes the aforementioned electric actuator.

[0022] Other features and advantages of this specification will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0023] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of this specification and, together with their description, serve to explain the principles of this specification.

[0024] Figure 1 This is an exploded view of the actuator section structure in an embodiment of the present invention;

[0025] Figure 2 This is a top view of the actuator portion structure in an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the structure of the actuator's feedback adjustment mechanism and spindle assembly in an embodiment of the present invention.

[0027] Figure 4 This is a top view of the feedback adjustment mechanism of the actuator in an embodiment of the present invention;

[0028] Figure 5 This is a side view of the electric actuator portion structure in an embodiment of the present invention;

[0029] Figure 6 yes Figure 5 Top view;

[0030] Figure 7 This is a partial schematic diagram of the actuator in an embodiment of the present invention:

[0031] Figure 8 yes Figure 7 Exploded view of a portion of the area;

[0032] Figure 9 yes Figure 7 A partial sectional view;

[0033] Figure 10 This is an exploded view of the actuator in an embodiment of the present invention;

[0034] Figure 11 yes Figure 10 Exploded view of part of the structure;

[0035] Figure 12 This is a top view of the gear transmission assembly in an embodiment of the present invention;

[0036] Figure 13 This is a side sectional view of a partial structure of the electric actuator in an embodiment of the present invention;

[0037] Figure 14 This is a schematic diagram of the sealing ring structure in an embodiment of the present invention;

[0038] Figure 15 yes Figure 14 Axial cross-sectional view;

[0039] Figure 16 This is a schematic diagram of the sealing ring structure in an embodiment of the present invention;

[0040] Figure 17 This is a partial structural side sectional view of the sealing ring in an embodiment of the present invention.

[0041] Explanation of reference numerals in the attached figures:

[0042] 1. Feedback setting organization;

[0043] 11. Trigger switch; 11a. Switch body; 11b. Trigger protrusion;

[0044] 12. Trigger;

[0045] 121. Main body; 121a. First end; 121b. Second end; 121c. Insertion hole; 121d. First pointer; 121e. Snap-fit ​​structure;

[0046] 122. Trigger end;

[0047] 123. Limiting ring; 123a. First ring segment; 123b. Second ring segment; 123c. Limiting tooth;

[0048] 13. Connecting part;

[0049] 131. Flange section; 131a. First tooth section; 132. Annular boss; 132a. Mating tooth;

[0050] 2. Potentiometer assembly;

[0051] 21. Potentiometer body;

[0052] 22. Potentiometer connectors;

[0053] 22a, Third tooth; 22b, Limiting tooth; 22c, Connecting shaft;

[0054] 311. Electric drive gear; 312. Electric motor;

[0055] 32. Hand drive plug-in; 321. Hand drive connection part; 321b. Hand drive gear; 321c. Hand drive connector; 32a. Insertion end; 32b. Drive end; 33a. Triggering device; 33b. Sensing device;

[0056] 4. Gear transmission assembly;

[0057] 41. Power input gear set; 411. First input gear; 412. Second input gear;

[0058] 42. Connecting wheel; 421. First wheel body; 42a. First rack; 42b. Second rack;

[0059] 43. Power take-off gear set; 431. Sector gear; 432. Output gear; 432a. Third wheel body; 432b. Fourth wheel body;

[0060] 5. Mounting section; 51. Viewing window; 52. Mounting hole; 521. First hole section; 522. Second hole section; 523. Stepped surface;

[0061] 6. Signage Department;

[0062] 7. Support assembly; 71. First base; 72. Second base; 721a. Bracket; 721b. Support plate; 721c. Clearance hole; 73. Upper box plate; 74. Motor mount; 75. Electric drive mounting position;

[0063] 8. Shell;

[0064] 81. Inner cavity; 811. Mounting through hole; 812. Sealing ring; 813. Cover plate;

[0065] 82. First socket;

[0066] 83a, First half-shell; 83b, Second half-shell;

[0067] 84. Plug; 841. Associated with;

[0068] 85. Connecting hole; 85a. Hole wall (connecting hole); 851. Limiting flange;

[0069] 9. Spindle assembly; 91. Spindle body; 92. Spindle connector; 921. Second tooth; 922. Flange; 923. Groove;

[0070] 93. Sealing ring; 93a. Positioning block; 94. Mounting sleeve. Detailed Implementation

[0071] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0072] This invention provides an electric actuator for connection to a valve. See also... Figure 1 The electric actuator includes a power input component, a support component 7, a spindle assembly 9, and a feedback setting mechanism 1. The power input component provides driving force to the spindle assembly 9 and can be either an electric drive (composed of a motor) or a manual drive (manually driven). One end of the spindle assembly 9 is connected to the power input component, and the other end is connected to the valve shaft (not shown in the figure) to open, close, or adjust the valve opening.

[0073] like Figure 1 and Figure 2 As shown, the spindle assembly 9 and the feedback setting mechanism 1 are respectively connected to the support assembly 7 and can rotate relative to the support assembly 7. Under the action of the power input assembly, the spindle assembly 9 can rotate within a set rotation angle α in a first direction to gradually open the valve or in a second direction to gradually close the valve, wherein the first direction and the second direction are opposite. The position where the spindle assembly 9 begins to rotate in the first direction or in the second direction is the starting position of the spindle assembly. The starting position corresponds to the position where the spindle assembly 9 begins to rotate when the valve is fully open or fully closed.

[0074] See also Figure 2 The feedback setting mechanism 1 includes a trigger switch 11 and a trigger element 12. The trigger switch 11 is set at a predetermined position via a support assembly 7. The trigger element 12 can form a line sensing or point sensing with the trigger switch 11 to cooperate with the initial feedback position.

[0075] In the online sensing state, the initial feedback position refers to the starting position where the trigger element 12 and the trigger switch 11 form a sensing connection in the rotation direction of the trigger element 12. When the trigger end 122 and the trigger switch 11 are in line sensing state, one end point of the trigger end 122 is located at the initial feedback position.

[0076] See Figure 3 The feedback setting mechanism 1 also includes a connecting part 13. The connecting part 13 is rotatably connected to the trigger member 12, and can cooperate with the trigger member 12 in both follow-up and adjustment modes. Simultaneously, the connecting part 13 is connected to the spindle assembly 9 and can rotate simultaneously in the follow-up direction when the spindle assembly 9 rotates. The follow-up mode refers to a state where the connecting part 13 and the trigger member 12 are relatively stationary, and the trigger member 12 can rotate together with the connecting part 13 as the spindle assembly 9 rotates. The adjustment mode refers to a state where the trigger member 12 rotates relative to the connecting part 13. The follow-up direction refers to the direction in which the trigger member 12 rotates as the spindle assembly 9 rotates under the influence of the connecting part 13.

[0077] Specifically, Figure 2The trigger switch 11 and the trigger element 12 are arranged radially opposite each other. The trigger switch 11 includes a trigger protrusion 11b (located in the switch body 11a) that can elastically protrude and retract. Figure 2 (The location indicated by the arrow P in the middle).

[0078] Figure 3 The trigger element 12 includes a trigger end 122, which protrudes radially from the main body portion 121 of the trigger element 12. The trigger end 122 can engage with the trigger protrusion 11b at the initial feedback position through point contact and line contact.

[0079] When the trigger end 122 and the trigger protrusion 11b make point or line contact, the trigger end 122 pushes the trigger protrusion 11b into the switch body 11a, thereby triggering the switch 11 to generate a feedback signal. When the trigger member 12 continues to rotate until the trigger end 122 and the trigger protrusion 11b separate radially, the trigger protrusion 11b is ejected from the switch body 11a, and the trigger switch 11 no longer generates a feedback signal. This feedback signal can be an on or off signal of the trigger switch 11, or it can be other types of signals that can be acquired externally.

[0080] In a specific practical application example, combined with Figure 2 and Figure 3 As shown, when the actuator is in the initial state and the valve is in the closed state, the spindle assembly 9 is in the starting position. At this time, the trigger element 12 and the trigger switch 11 are in the initial feedback position.

[0081] First, the spindle assembly 9 rotates in the first direction under the action of the power input assembly to open the valve to the set angle β. At this time, the trigger 12 and the connecting part 13 cooperate in the rotational operation. Driven by the connecting part 13, the trigger 12 rotates together with the spindle assembly 9. At this time, the trigger end 122 deviates from the initial feedback position, and there is no feedback signal.

[0082] Then, the trigger 12 and the connecting part 13 are engaged in the adjustment condition. At this time, the spindle assembly 9 and the connecting part 13 no longer rotate, and both the spindle assembly 9 and the connecting part 13 maintain a constant rotation angle β. The valve maintains the corresponding opening angle accordingly. At this time, the trigger 12 is driven alone to rotate the trigger end 122 and realign it with the trigger switch 11 at the initial feedback position, generating a new feedback signal. This allows the rotation angle β of the spindle assembly 9 to be memorized. That is, when the spindle assembly 9 is at angle β, the trigger 12 and the trigger switch 11 are aligned for feedback. Thus, the angle at which the trigger end 122 and the trigger switch 11 begin to form feedback can be adjusted to β. By adjusting the feedback angle of the feedback adjustment mechanism, the valve opening can be memorized. Afterward, the trigger 12 and the connecting part 13 are back in the rotation-following condition during valve adjustment.

[0083] Subsequently, under the rotating condition, the trigger end 122 will only make contact with the trigger switch 11 when the spindle assembly 9 rotates again to angle β in the first direction, and the trigger switch 11 will start to generate feedback.

[0084] See Figure 2 and Figure 4 When the trigger end 122 forms line contact with the trigger protrusion 11b, the center angle of the trigger end 122 is γ, where α≤γ<360°. The center angle of the trigger end 122 refers to the angle between the two circumferential endpoints A and A' of the trigger end 122 and the center of the circle containing the trigger end 122.

[0085] Therefore, as the spindle assembly 9 continues to rotate along the first direction from the angle β, the trigger end 122 remains in contact with the trigger protrusion 11b and continues to provide feedback until the spindle assembly 9 rotates to its maximum angle along the first direction. At this point, when the spindle assembly 9 rotates along the second direction, the trigger end 122 and the trigger protrusion 11b remain in contact, thus the trigger switch 11 continues to provide feedback. Only after the spindle assembly 9 has rotated through the memorized angle β along the second direction does the trigger element 12 and the trigger switch 11 separate, and the trigger switch 11 ceases to provide feedback.

[0086] Of course, the trigger end 122 and the trigger protrusion 11b can also be in point contact. However, in this case, when the spindle assembly 9 rotates along the first and second directions, the trigger protrusion 11b and the trigger end 122 will respectively form contact and generate two feedback signals. The valve opening angles corresponding to the two feedback signals are not necessarily equal. Therefore, it is necessary to identify the two sets of feedback signals to correspond to the valve opening angle.

[0087] This control method is relatively complex. When the trigger end 122 and the trigger bump 11b are in line contact, it is possible to avoid generating two feedback signals, thereby avoiding the need to distinguish between the two sets of feedback signals.

[0088] It is understood that the trigger switch 11 can be a photoelectric switch or an electromagnetic switch, etc., and the type of trigger switch 11 is not limited here. When the trigger switch 11 is a photoelectric switch, the trigger end 122 of the trigger element 12 can form point sensing or line sensing with the photoelectric switch. Point sensing means that the trigger end 122 can block the photoelectric switch at a certain point, and line sensing means that the trigger end 122 can block the photoelectric switch in the direction in which the trigger end 122 extends.

[0089] When the trigger switch 11 is an electromagnetic switch, the trigger end 122 is provided with a magnetic element. When the trigger end 122 and the trigger switch 11 form a point induction, the magnetic element can trigger the electromagnetic switch at a single position. When the trigger end 122 and the trigger switch 11 form a line induction, the trigger positions of the magnetic element and the electromagnetic switch cover the range extended by the trigger end 122, so that when the trigger end 122 rotates, the magnetic element and the electromagnetic switch form an induction along the outline of the trigger end 122.

[0090] In some embodiments, see Figure 3 and Figure 4 The main body 121 of the trigger 12 has an approximately cylindrical structure. The trigger 12 also includes a limiting ring 123 disposed on the outside of the main body 121. The limiting ring 123 extends radially along the main body 121 and is disposed circumferentially around the main body 121, while extending a certain distance axially.

[0091] The main body 121 is built into the connecting part 13 and forms an axial limit with the connecting part 13. The outer wall of the main body 121 is clearance-fitted with the inner wall of the connecting part 13. The limiting ring 123 is sleeved on the outer side of the connecting part 13, and a part of the connecting part 13 is located radially between the main body 121 and the limiting ring 123.

[0092] See Zhou Xiang Shang for more details. Figure 4 The limiting ring 123 includes a first ring segment 123a and a second ring segment 123b, which are connected end-to-end to form a closed loop structure. The second ring segment 123b is bent into an approximately W-shaped structure in the radial cross-section to provide elasticity. Optionally, the middle part of the second ring segment 123b abuts against the outer wall of the connecting portion 13.

[0093] The first ring segment 123a contacts the outer wall of the connecting portion 13, and a portion of the second ring segment 123b protrudes radially toward the side away from the connecting portion 13 to be spaced apart from the outer wall of the connecting portion 13. A portion of the second ring segment 123b is close to and abuts against the outer wall of the connecting portion 13.

[0094] A plurality of limiting protrusions 123c are provided at the position where the second ring segment 123b abuts against the outer wall of the connecting part 13. The outer wall of the connecting part 13 is provided with mating protrusions 132a that can be adapted to the limiting protrusions 123c. Each mating protrusion 132a and the limiting protrusion 123c extends axially. When the mating protrusion 132a and the limiting protrusion 123c are engaged under the action of the second ring segment 123b, they can form a circumferential limit on the trigger 12 and the connecting part 13.

[0095] When the connecting part 13 and the trigger 12 are engaged in the adjustment condition, when a torque is applied to the trigger 12 to drive it to rotate along its central axis, the meshing surfaces of the limiting tooth 123c and the mating tooth 132a generate a reaction force to drive the second ring segment 123b to deform. When the torque is greater than the elastic force of the second ring segment 123b and the frictional force between the limiting ring 123 and the connecting part 13, the trigger 12 rotates relative to the connecting part 13.

[0096] Of course, the second ring segment 123b may not be far from the outer wall of the connecting portion 13, but may directly contact the outer wall of the connecting portion 13. However, it is understood that when the method of this embodiment is adopted, by making the second ring segment 123b into a bent structure to have elasticity, partially away from the connecting portion 13 and partially engaging with the mating protrusion 132a, it is possible to effectively avoid the situation where the friction between the trigger member 12 and the connecting portion 13 is too large or too small, and at the same time, it is also possible to avoid the situation where the mating protrusion 132a and the limiting protrusion 123c are worn.

[0097] Optionally, such as Figure 3 and Figure 4 As shown, the trigger end 122 and the limiting ring 123 are distributed along the axial direction. The radial dimension of the trigger end 122 is smaller than that of the first ring segment 123a, and the radial dimension of the first ring segment 123a is smaller than that of the second ring segment 123b.

[0098] This ensures that the size of the trigger end 122 does not interfere with the size of the second ring segment 123b, allowing for more design flexibility in the second ring segment 123b. Those skilled in the art can determine the bending shape and radial dimension of the second ring segment 123b according to the required elasticity.

[0099] Optionally, the two endpoints A and A' of the trigger end 122 extending circumferentially are approximately aligned with the two endpoints B and B' of the second ring segment 123b extending circumferentially. The limiting tooth 123c is radially symmetrically arranged with the midpoint of the trigger end 122 in the circumferential direction, which is located at the midpoint between A and A'.

[0100] By means that the trigger end 122 is radially arranged on the side where the first ring segment 123a is located, and is radially symmetrically arranged with the limiting protrusion 123c of the second ring segment 123b, when the trigger protrusion 11b is pushed into the switch body 11a by the trigger end 122, the trigger protrusion 11b applies a reverse thrust F1 to the trigger end 122. F1 is transmitted from the trigger end 122 through the connecting part 13 to the second ring segment 123b. The second ring segment 123b deforms under the action of F1. Under the action of the elastic force of the second ring segment 123b, the connecting part 13 is subjected to a reverse thrust F2 applied by the second ring segment 123b.

[0101] This avoids radial displacement of the connecting part 13 and increases the holding force of the trigger end 122 on the trigger protrusion 11b, thereby improving the reliability of the engagement between the trigger end 122 and the trigger protrusion 11b.

[0102] In the above embodiments, see Figure 3 The connecting part 13 is flange-shaped, including a flange portion 131 and an annular boss 132 protruding axially from the flange portion 131. The annular boss 132 extends between the main body portion 121 of the trigger member 12 and the limiting ring 123, and a tooth 132a is provided on the outer wall of the annular boss 132.

[0103] The main body 121 of the trigger 12 includes a first end 121a and a second end 121b arranged axially opposite to each other. The first end 121a extends from one side of the flange portion 131, and a snap-fit ​​structure 121e is provided at the first end 121a. The end face of the limiting ring 123 presses against the end face of the flange portion 131. The snap-fit ​​structure 121e and the limiting ring 123 are respectively arranged on both sides of the flange portion 131 in the axial direction so that the trigger 12 and the connecting portion 13 form an axial limit.

[0104] In one specific embodiment, the outer peripheral sidewall of the flange portion 131 is provided with a first tooth 131a. The spindle assembly 9 is provided with a second tooth 921, which is disposed around the spindle assembly 9. The first tooth 131a and the second tooth 921 engage radially, thereby enabling the connecting portion 13 to rotate synchronously with the spindle assembly 9.

[0105] For example, see Figure 1 The spindle assembly 9 includes a spindle connector 92 and a spindle body 91, with the spindle connector 92 connected to the spindle body 91. A second tooth 921 is disposed on the spindle connector 92.

[0106] Alternatively, the spindle connector 92 can be omitted, allowing the first tooth 131a to directly mesh with the spindle body 91. However, by including the spindle connector 92, the structure of the spindle body 91 is simplified, and the machining process of the spindle body 91 is made easier.

[0107] Optionally, in Figure 3 and Figure 4 In the case of the trigger 12, the second end 121b of the main body portion 121 extends from the annular boss 132 to the outside of the housing 8. An insertion hole 121c is provided on the end face of the second end 121b. Figure 1 and Figure 4 The actuator is also equipped with a hand drive plug 32 that is adapted to the insertion hole 121c of the trigger 12. The hand drive plug 32 is inserted into the insertion hole 121c and is circumferentially limited by the hole wall of the insertion hole 121c, thereby driving the trigger 12 to rotate relative to the connecting part 13 by a manual pin.

[0108] Of course, in addition to manually rotating the trigger 12, the trigger 12 can also be electrically driven to rotate relative to the connecting part 13. Compared with the electric drive method, the manual drive method has a simpler structure.

[0109] Optionally, combined Figure 1 as well as Figure 3 Since the second end 121b of the main body 121 of the trigger 12 extends out of the housing 8, in order to seal the housing 8, an inner cavity 81 can be provided on the housing 8, and the second end 121b extends out of the housing 8 from the bottom of the inner cavity 81. An openable and closable cover plate 813 is provided at the opening of the inner cavity 81, and the cover plate 813 is sealed to the edge of the opening of the inner cavity 81 by a sealing ring 812.

[0110] Optionally, see Figure 16 and Figure 17 A positioning protrusion 812 is provided on the sealing ring 812, so that the positioning protrusion 812a serves to prevent fooling when the cover plate 813 is placed on the opening of the inner cavity 81. The upper lip 812c of the sealing ring 812 is embedded into the cover plate 813 to a certain depth to ensure installation strength. In addition, a double-layer sealing structure 812b is used to seal the inner cavity 81. Alternatively, to prevent the sealing ring 812 from winding during installation, the opposite side of the upper lip 812c of the sealing ring 812 is designed with a large flat surface, thereby effectively increasing the stability of the installation of the sealing ring 812. Optionally, the cover plate 813 is connected to the opening of the inner cavity 81 by a threaded connection, for example, by forming a connection with eight star-shaped triangular thread anti-loosening screws, thereby further enhancing the sealing effect.

[0111] Optionally, in Figure 3 In the middle, a first pointer 121d is also provided on the end face of the second end 121b. The first pointer 121d is located at point A or point A' of the trigger end 122. A second pointer (not shown in the figure) is also provided on the housing 8. The second pointer is located at the trigger protrusion 11b.

[0112] As in Figure 1 In the inner cavity 81, a mounting through hole 811 is provided at the bottom, and the second end 121b extends out from the mounting through hole 811. The second pointer is positioned close to the mounting through hole 811. When the first pointer 121d and the second pointer are aligned, the trigger 12 and the trigger switch 11 are in the initial feedback position.

[0113] Alternatively, a buzzer can be connected to the trigger switch 11. When the trigger element 12 and the trigger switch 11 are in the initial feedback position, the buzzer will sound a warning. This allows for a warning sound to be emitted when it is inconvenient to observe the first pointer 121d and the second pointer.

[0114] The actuator described above also includes a potentiometer assembly, a power input assembly, a gear transmission assembly, and a marking section, which will be described in turn below.

[0115] potentiometer assembly

[0116] In some embodiments, such as Figure 5 As shown, the actuator also includes a potentiometer assembly 2, which is configured so that its resistance changes in response to changes in the rotation angle of the spindle assembly 9. The potentiometer assembly 2 is provided with a positioning element (such as...). Figure 5 (As shown in position 22b), the positioning element corresponds to the initial position of the resistance change in potentiometer assembly 2. The spindle assembly 9 is provided with an adapter (such as...) that can be inserted and positioned with the positioning element. Figure 5 (See position shown in 923). The adapter corresponds to the starting position of the spindle assembly 9.

[0117] Specifically, in Figure 5 and Figure 6 In this assembly, potentiometer assembly 2 includes a potentiometer body 21 and a potentiometer connector 22 connected to the potentiometer body 21. The potentiometer connector 22 is connected to and rotates synchronously with the spindle assembly 9. When the potentiometer connector 22 rotates, it causes a corresponding change in the resistance of the potentiometer body 21. The initial position of the resistance change in potentiometer assembly 2 is the starting position of the resistance change in potentiometer body 21. In a specific example, the positioning element is a limiting tooth 22b, and the adapter is a groove 923 that fits into the limiting tooth 22b.

[0118] During actual assembly, the limiting protrusion 22b of the potentiometer connector 22 corresponds to the initial position of the resistance change of the potentiometer body 21, and the groove 923 corresponds to the starting position of the spindle assembly 9. Furthermore, the potentiometer body 21 is connected to the spindle assembly 9 via the potentiometer connector 22 and rotates synchronously. Therefore, when the limiting protrusion 22b and the groove 923 form a positioning engagement, the initial position of the resistance change of the potentiometer body 21 aligns with the starting position of the spindle assembly 9, thus ensuring that the starting positions of the spindle assembly 9 and the potentiometer assembly 2 rotate in unison, thereby avoiding deviations in the signal feedback from the potentiometer assembly 2.

[0119] See Figure 5 and Figure 6To ensure that the resistance of the potentiometer body 21 changes accordingly with the rotation angle of the spindle assembly 9, the potentiometer connector 22 is provided with a connecting shaft 22c. The connecting shaft 22c extends axially from the potentiometer connector 22, and its radial cross-section is D-shaped. The potentiometer body 21 includes a shaft hole adapted to the connecting shaft 22c. The connecting shaft 22c extends into the shaft hole and forms a fit, so that when the potentiometer connector 22 rotates, the resistance of the potentiometer body 21 can be changed via the connecting shaft 22c. The method by which the potentiometer connector 22 changes the resistance of the potentiometer body 21 is prior art and will not be described in detail here.

[0120] In a specific embodiment, see [link to relevant documentation]. Figure 11 and Figure 13 The spindle assembly 9 includes a spindle body 91 and a spindle connector 92 connected to the spindle body 91. The spindle connector 92 and the spindle body 91 can be directly or indirectly connected.

[0121] Combination Figure 5 and Figure 6 As shown, the spindle connector 92 has an approximate flange structure. A second tooth 921 is provided circumferentially on the outer periphery of the spindle connector 92. The second tooth 921 includes a plurality of protruding teeth spaced apart circumferentially.

[0122] The potentiometer connector 22 has a third tooth 22a circumferentially arranged along the outer periphery of the potentiometer connector 22. The second tooth 921 and the third tooth 22a engage radially, so that when the spindle connector 92 rotates, the potentiometer connector 22 rotates synchronously.

[0123] Of course, the potentiometer assembly 2 and the spindle assembly 9 can also rotate together without the spindle connector 92 and the potentiometer connector 22 being radially engaged. For example, the potentiometer connector 22 has a connection hole, and the spindle body 91 extends into the connection hole to achieve a axial connection with the potentiometer connector 22. However, the radial engagement of the potentiometer connector 22 and the spindle connector 92 can significantly reduce the space occupied by the potentiometer assembly 2.

[0124] Furthermore, the limiting protrusion 22b and the third tooth 22a are distributed axially, and the groove 923 and the second tooth 921 are distributed axially. This avoids the groove 923 and the limiting protrusion 22b occupying radial space, thus improving the utilization rate of axial space.

[0125] Specifically, see Figure 5 and Figure 6The spindle connector 92 is provided with a flange 922, which is circumferentially arranged and extends radially. The flange 922 extends radially to the outside of the second tooth 921, and the groove 923 extends radially and passes through the flange 922 axially. The groove 923 is aligned with the gap between two adjacent teeth of the second tooth 921.

[0126] A limiting tooth 22b is disposed on the potentiometer connector 22. The radial dimension of the main body portion 22d of the potentiometer connector 22 is smaller than the radial dimension of the third tooth portion 22a. That is, the main body portion 22d of the potentiometer connector 22 is radially retracted relative to the third tooth portion 22a, and the limiting tooth 22b is disposed on the main body portion 22d. The limiting tooth 22b is axially aligned with the tooth of at least one of the third tooth portions 22a. In other words, the radial projection range of the limiting tooth 22b is located within the radial projection range of the third tooth portion 22a.

[0127] Therefore, the limiting protrusion 22b and the groove 923 can form a plug-in fit, and the engagement of the limiting protrusion 22b in the groove 923 can also avoid interference caused when the potentiometer connector 22 and the spindle connector 92 rotate relative to each other.

[0128] Furthermore, in order to prevent the limiting tooth 22b from being worn by the groove edge of the groove 923 when it engages with the groove 923 and is rotated out of the groove 923 as the potentiometer connector 22 rotates, the groove edge of the groove 923 is made into a chamfered structure.

[0129] In some embodiments, the spindle connector 92 simultaneously engages radially with the feedback setting mechanism 1 to drive the feedback setting mechanism 1 to rotate together. Thus, by engaging the feedback setting mechanism 1 and the potentiometer assembly 2 with the spindle connector 92, the integration level of the actuator can be improved, and the space occupied by the actuator can be reduced.

[0130] Power input components

[0131] In some embodiments, see Figure 7 and Figure 8 The spindle assembly 9, transmission assembly, and power input assembly are housed within the housing 8. The power input assembly includes an electric drive assembly (not shown) and a hand drive assembly. The electric drive assembly includes an electric drive connector (not shown) and a motor (not shown). The hand drive assembly includes a hand drive connector 321 and a hand drive insert 32. The electric drive assembly is connected to the transmission assembly via the motor and the electric drive connector, and provides driving force to the spindle assembly 9 via the transmission assembly. The hand drive connector 321 is a component for connecting with the hand drive insert 32. The hand drive insert 32 can be selectively inserted into the hand drive connector 321. The hand drive connector 321 is connected to the spindle assembly 9, and rotating the hand drive insert 32 can drive the spindle assembly 9 to rotate.

[0132] See Figure 7 and Figure 8 The hand-drive plug-in 32 can cooperate with the hand-drive access part 321 at both the disengagement station and the insertion station. The hand-drive plug-in 32 refers to a component that is manually driven and can be inserted into or removed from the hand-drive access part 321.

[0133] In a specific example, see Figure 8 The hand drive access part 321 includes a hand drive gear 321b and a hand drive connector 321c. One side of the hand drive connector 321c is connected to the hand drive plug 32, and the other side is connected to the hand drive gear 321b via a spline. The hand drive gear 321b is connected to the transmission assembly for transmission. This enables torque transmission from the hand drive plug 32 to the spindle assembly 9.

[0134] Of course, it is also possible to omit the hand drive connector 321c and directly connect the hand drive plug-in 32 to the hand drive gear 321b.

[0135] like Figure 7 and Figure 8 As shown, the housing 8 includes a first half-shell 83a and a second half-shell 83b, which interlock to form an accommodating space. The first half-shell 83a has a first insertion hole 82 adapted to the hand drive connector 321c. The hand drive connector 321c is located within the accommodating space, and a first circumferential limiting hole (not shown) is provided at the end of the hand drive connector 321c near the first half-shell 83a. The first circumferential limiting hole is aligned with and communicates with the first insertion hole 82. The hand drive plug 32 can pass through the first insertion hole 82 and be inserted into the first circumferential limiting hole, forming a circumferential limit with the first circumferential limiting hole to transmit torque.

[0136] The first circumferential limiting hole is a structure used to form a circumferential limit for the hand drive plug-in 32. For example, the first circumferential limiting hole is a rectangular hole, a hexagonal hole, etc. The structure of the hand drive plug-in 32 can be adapted to the first circumferential limiting hole.

[0137] exist Figure 8 In the middle, the hand drive plug-in 32 is also provided with a trigger device 33a, and a sensing device 33b is provided inside the housing 1. The sensing device 33b is located at a position that can form a sensing with the trigger device 33a.

[0138] The actuator also includes a control component (not shown in the figure) for controlling the electric drive assembly to be in a powered-on and powered-off state. The control component is connected to the sensing device 33b and / or the triggering device 33a. As the hand-driven plug 32 rotates, the triggering device 33a and the sensing device 33b can cooperate in a first sensing state and a second sensing state.

[0139] When the hand-drive plug-in 32 is inserted into the first circumferential limiting hole, the trigger device 33a and the sensing device 33b sense each other and enter the first sensing state, generating a first signal and sending it outward. Upon receiving the first signal, the control component cuts off the power supply to the electric drive component. At this time, the electric drive component is in a power-off state, and the motor does not work.

[0140] When the hand-drive plug-in 32 is pulled out from the first peripheral limiting hole, the hand-drive plug-in 32 and the hand-drive connector 321c engage at the disengagement position. The trigger device 33a and the sensing device 33b are in the second sensing state, generating a second signal and sending it outward. After receiving the second signal, the control component powers on the electric drive component, at which point the electric drive component is in the powered-on state. The method by which the control component powers on and off the electric drive component is a conventional technique in the art and will not be described in detail here.

[0141] By adopting the method in this embodiment, when the hand drive plug 32 is inserted into the hand drive connector 321c, the trigger device 33a and the sensing device 33b form a connection and are in the first sensing state, and the control component cuts off the power supply to the electric drive component. This can improve the safety of manual operation, prevent the actuator from performing manual operation while it is powered on, and at the same time, the actuator can automatically restore power supply after the hand drive plug 32 is pulled out, thus improving the intelligence of the actuator's power on and power off.

[0142] Optionally, see Figure 8 and Figure 9 The hand-drive plug-in 32 includes an insertion end 32a and a drive end 32b arranged opposite each other in the insertion direction. The insertion end 32a is used to insert the hand-drive connector 321c, and the drive end 32b is used to bear torque. A triggering device 33a is provided on the end face of the insertion end 32a, and a sensing device 33b is arranged between the hand-drive access part 321 and the first half-shell 83a in the insertion direction.

[0143] Therefore, when the hand-drive plug-in 32 is working in the insertion direction, the triggering device 33a can sense the sensing device 33b before the hand-drive plug-in 32 and the hand-drive access part 321 are engaged in the insertion station, thereby further improving the safety of manual operation.

[0144] The insertion direction is the direction in which the hand drive plug-in 32 and the hand drive access part 321 form a plug-in engagement. It can be vertical, horizontal or other directions. There is no specific restriction on the insertion direction.

[0145] Of course, the triggering device 33a may not be located on the end face of the insertion end 32a, but may be located on the side wall of the insertion end 32, or at other locations on the hand drive plug-in 32. As long as the sensing range of the triggering device 33a and the sensing device 33b is sufficient to form a sense before the hand drive plug-in 32 is inserted into the hand drive access part 321.

[0146] For example, the sensing device 33b is a Hall sensor. The triggering device 33a is a strong magnetic element. Thus, the strong magnetic element can form a connection with the Hall sensor before the hand-drive plug 32 is inserted into the first circumferential limiting hole.

[0147] In a specific example, a method for fixing the Hall sensor in a set position is provided.

[0148] See Figure 7 and Figure 8 The actuator includes a circuit board assembly (not shown in the figure), which includes a first circuit board and a second circuit board. A Hall sensor is disposed on the second circuit board. The actuator also includes a support assembly 7, which includes a first base 71 for supporting the first circuit board and a second base 72 for supporting the second circuit board. The second circuit board is mounted on the first base 71 via the second base 72, such that the second circuit board is located between the housing 8 and the hand-drive connector 321c. For example, the second base 72 is inserted, riveted, or glued to the first base 71. The first base 72 is inserted and fixed to the upper housing plate of the actuator.

[0149] The second base 72 has a bracket 721a and a support plate 721b. The bracket 721a is arranged perpendicular to the support plate 721b, and the support plate 721b is arranged parallel to the first base 71. The support plate 721b has a clearance hole 721c. The projection range of the clearance hole 721c, the first insertion hole 82, and the first circumferential limiting hole overlaps in the insertion direction, so that the hand-driven plug-in 32 can be inserted into the first circumferential limiting hole in sequence through the first insertion hole 82 and the clearance hole 721c. In the state where the actuator is assembled, in the insertion direction, the side of the support plate 721b closer to the first base plate 71 is provided with a hand-driven access part 321, and the support plate 721b is closer to the housing 1.

[0150] In other embodiments, see Figure 8 When the hand drive plug 32 is separated from the hand drive connector 321c, a plug 84 is provided to seal the first socket 82. The first socket 82 is sealed by the plug 84.

[0151] For example, the plug 84 is threadedly connected to the wall of the first insertion hole 82. For example, the outer wall of the plug 84 is provided with an external thread structure, and the wall of the first insertion hole 82 is provided with a matching internal thread structure.

[0152] Alternatively, the plug 84 can be engaged with the wall of the first socket 82. However, this engagement method results in greater stress on the plug 84 during engagement and disengagement, accelerating wear. In contrast, a threaded connection reduces the stress on the plug 84 during connection to the first socket 82, thus lowering the probability of wear.

[0153] Furthermore, to enhance the sealing effect, a sealing element is also provided between the threads of the external thread structure of the plug 84.

[0154] Optionally, a second circumferential limiting hole (not shown in the figure) is provided on the end face of the plug 84. The second circumferential limiting hole can form a circumferential limit with the hand-driven plug 32, thereby facilitating the screwing of the plug 84. The first circumferential limiting hole and the second circumferential limiting hole have the same structure. Therefore, the hand-driven plug 32 can be inserted into the first circumferential limiting hole and the second circumferential limiting hole respectively, reducing the number of actuator accessories.

[0155] Optionally, see Figure 7 , Figure 8 and Figure 9 The plug 84 is also provided with a connecting strip 841, which is connected to the housing 8. When the plug 84 is removed, the plug 84 is hung on the housing 8 by the connecting strip 841, thereby preventing the plug 84 from being lost.

[0156] Gear transmission components

[0157] The electric actuator also includes a transmission assembly disposed within the housing space, the transmission assembly being a gear transmission assembly 4. For example... Figure 10 and Figure 11 As shown, the power input component is connected to the main shaft component 9 via the gear transmission component 4.

[0158] By using the technical solution of this invention, the torque transmission method of conventional worm gear coupling is replaced by using gear transmission assembly 4, which significantly improves the transmission efficiency of the actuator and reduces or avoids the problem of high heat generation when the actuator is working continuously at high power.

[0159] In addition, the wear rate of gear transmission assembly 4 is relatively low, and replacing worm gear transmission with gear transmission can reduce the cost of actuator parts.

[0160] In a specific example, the electric drive input of the power input component is connected to the gear transmission component 4.

[0161] like Figure 12As shown, in a specific example, the electric drive connection is an electric drive gear 311. The electric drive gear 311 is connected to the output shaft of the motor 312, so that the motor 312 can drive the electric drive gear 311 to rotate.

[0162] Combination Figure 10 and Figure 12 The hand drive access part 321 includes a hand drive gear 321b and a hand drive connector (not shown in the figure). One side of the hand drive connector is connected to the hand drive plug 32, and the other side is connected to the hand drive gear 321b via a spline. The hand drive gear 321b meshes with the gear transmission assembly 4. This enables torque transmission from the hand drive plug 32 to the spindle assembly 9.

[0163] Of course, it is also possible to skip the hand drive connector and directly connect the hand drive plug-in 32 to the hand drive gear 321b.

[0164] See Figure 11 and Figure 12 The gear transmission assembly 4 includes a power input gear set 41, a connecting gear 42, and a power output gear set 43 that mesh and transmit power in sequence. The power input gear set 41 is used to connect to the electric drive assembly, and the power output gear set 43 is used to connect to the main shaft assembly 9.

[0165] The electric drive assembly is connected to the connecting wheel 42 via the power input wheel set 41. The connecting wheel 42 meshes with both the hand drive gear 321b and the power output wheel set 43 to form a transmission connection.

[0166] Therefore, by connecting the power input gear set 41, the power output gear set 43 and the hand drive gear 321b simultaneously through the connecting wheel 42, the integration of the gear transmission assembly 4 can be improved and the space occupied by the gear transmission assembly 4 can be reduced.

[0167] Of course, the connecting wheel 42 can also be connected to the power output wheel set 43 by setting a matching gear that can mesh with the hand drive gear 321b. This way, the hand drive gear 321b can be connected to the power output wheel set 43 for reduction. This can also achieve the effect of transmitting torque, but this requires setting two gear reduction systems for the hand drive gear 321b and the power input wheel set 41, making the structure of the gear transmission assembly 4 more complex and taking up more space.

[0168] Optionally, the power input wheel set 41, the connecting wheel 42, and the power output wheel set 43 are arranged in an S-shape in the radial direction. This further reduces the radial space occupied by the gear transmission assembly 4.

[0169] Specifically, such as Figure 12As shown, the connecting wheel 42 includes a first wheel body 421 and a second wheel body distributed along the axial direction. The first wheel body 421 and the second wheel body rotate coaxially. The radial distance between the first wheel body 421 and the second wheel body is greater than the radial distance between the second wheel body to achieve a set reduction ratio. The first wheel body 421 includes an annular main body portion and a base plate. The annular main body portion includes an inner ring with a second rack 42b and an outer ring with a first rack 42a.

[0170] The power input gear set 41 is connected to one of the first and second racks 42b, and the hand drive gear 321b meshes with the other. The second wheel body meshes with the power output gear set 43.

[0171] Therefore, the manual drive assembly can transmit torque to the spindle assembly 9 through the connecting wheel 42, and the electric drive assembly can also transmit torque to the spindle assembly 9 through the connecting wheel 42.

[0172] like Figure 12 As shown, the power output gear set 43 includes a sector gear 431 connected to the main shaft assembly 9 and an output gear 432 connected to the sector gear 431 for speed reduction. When the main shaft assembly 9 rotates within a set angle α (α < 180°), the sector gear 431 can meet the rotation angle requirements of the main shaft assembly 9 and also reduce the space occupied by the gear transmission assembly 4.

[0173] The output gear 432 is a multi-stage gear. A multi-stage gear refers to a gear consisting of at least two gear bodies distributed along the axial direction, each with a different radial dimension, thereby enabling the transmission of torque at reduced speed.

[0174] The output gear 432 includes a third gear body 432a and a fourth gear body 432b that are distributed axially and rotate coaxially. The radial dimension of the third gear body 432a is larger than the radial dimension of the fourth gear body 432b. The third gear body 432a meshes with the second gear body of the connecting gear 42, and the fourth gear body 432b meshes with the sector gear 431.

[0175] The use of a multi-gear configuration for the output gear 432 can further reduce the space occupied by the gear transmission assembly 4. Of course, if the reduction ratio design requirements of the actuator are met, the output gear 432 may not be required.

[0176] In a specific example, the power input gear set 41 includes several input gears, which form a reduction transmission. The specific number of input gears can be set by those skilled in the art according to the gear ratio required by the actuator.

[0177] Optionally, at least one of the input gears is a multi-gear assembly. Each gear in the multi-gear assembly rotates synchronously. By configuring the gears in the power input gear set 41 as multi-gear assemblies, the radial space occupied by the gear transmission assembly 4 can be further reduced, and the integration of the gear transmission assembly 4 can be improved.

[0178] For example, see Figure 12 The power input gear set 41 includes a first input gear 411 and a second input gear 412. Both the first input gear 411 and the second input gear 412 include a large-diameter wheel body and a small-diameter wheel body distributed along the axial direction, and the radial distance between the large-diameter wheel bodies is greater than the radial distance between the small-diameter wheel bodies.

[0179] The small-diameter wheel of the second input gear 412 meshes with the outer ring 42a of the first wheel body 421 of the connecting wheel 42. The small-diameter wheel of the first input gear 411 meshes with the large-diameter wheel of the second input gear 412, and the large-diameter wheel of the first input gear 411 meshes with the electric drive gear 311, thereby realizing the reduction ratio set by the power input wheel set 41.

[0180] Optionally, such as Figure 11 As shown, the main body of motor 312 is detachably connected to upper housing plate 73 via motor mount 74. Upper housing plate 73 is radially connected to the inner wall of housing 8 along spindle assembly 9. The main body of motor 312 is threadedly connected to motor mount 74. Upper housing plate 73 has electric drive mounting position 75, and motor 312 is connected to electric drive mounting position 75 via motor mount 74. Motor mount 74 and electric drive mounting position 75 can be plug-in or splined, etc.

[0181] The upper housing 73 is detachably connected to the first base 71, and the first base 71 is detachably connected to the first circuit board 71a. The gear transmission assembly 4 is located on the side of the upper housing 73 opposite to the first base 71.

[0182] Therefore, the upper housing 73, the first base 71, the motor 312 and the first circuit board 71a can all be detachably connected, which facilitates the maintenance of the actuator.

[0183] Signage Department

[0184] In some embodiments of the present invention, such as Figure 11 and Figure 13 As shown, the electric actuator also includes a mounting section 5 and a marking section 6.

[0185] Mounting part 5 is connected to and communicates with the housing. A portion of the spindle assembly 9 is located within the housing. The housing and mounting part 5 are distributed along the axial direction of the spindle assembly 9, with the spindle assembly 9 extending from the housing into the mounting part 5. The mounting part 5 is provided with a viewing window 51. Marking part 6 is connected to the mounting part 5.

[0186] Specifically, the mounting part 5 has a mounting hole 52, which extends axially along the main shaft and penetrates the mounting part 5. A viewing window 51 radially penetrates a portion of the mounting part 5 and communicates with the mounting hole 52. A marking part 6 is provided within the mounting hole 52.

[0187] The housing includes a first half-shell (not shown in the figure) and a second half-shell 83b that are interlocked. The second half-shell 83b has a connecting hole 85, which is opposite to the mounting hole 52. The mounting part 5 is connected to the housing through the mounting hole 52 and the connecting hole 85.

[0188] The spindle assembly 9 extends from the housing through the connection hole 85 into the mounting hole 52. Part of the spindle assembly 9 is located within the connection hole 85, and part of it is located within the mounting hole 52.

[0189] The spindle assembly 9 is provided with markings, which are scales. The viewing window 51 is opposite to the marking and marking section 6 along the radial direction of the spindle assembly 9.

[0190] The scale and marking section 6 provided on the spindle assembly 9 can be seen through the viewing window 51. The marking section 6 has markings. The scale on the spindle assembly 9 is formed on the spindle assembly 9 by means of printing, coating or etching.

[0191] The spindle assembly 9 rotates to cause the scale to rotate relative to the marking section 6. When the spindle assembly 9 rotates relative to the marking section 6, the scale on the spindle assembly 9 aligns with the marking on the marking section 6, thereby indicating the rotation angle of the spindle assembly 9.

[0192] By employing the method described in this embodiment of the invention, the viewing window 51 can be directly aligned radially with the side wall of the spindle assembly 9. By cooperating with the marking on the spindle assembly 9 and the marking portion 6 within the mounting portion connection 5, the rotation angle of the spindle assembly 9 can be read through the viewing window 51.

[0193] Therefore, it is possible to avoid occupying the internal space of the housing by setting the reading mechanism inside the housing, and at the same time reduce or avoid the deviation caused by the method of reading the rotation angle of the main shaft through the reading mechanism and then reading the reading mechanism.

[0194] In one specific embodiment, the marking part 6 is sleeved on the outside of the spindle assembly 9, and the marking part 6 and the mounting part 5 form circumferential and axial limits.

[0195] Of course, the marking part 6 can also be installed directly inside the viewing window 51 instead of being fitted onto the outside of the spindle assembly 9. However, since the spindle assembly 9 is cylindrical and the position of the spindle assembly 9 relative to the viewing window 51 is curved, if the marking part 6 is installed inside the viewing window 51, light will be deflected when reading the rotation angle of the spindle assembly 9 through the viewing window 51. Therefore, placing the marking part 6 inside the viewing window 51 will cause a certain reading error.

[0196] Alternatively, the marking portion 6 could have an arc that matches the spindle assembly 9, thus reducing reading errors when the marking portion 6 is placed within the viewing window 51. However, this would increase the radial distance between the marking portion 6 and the spindle assembly 9, resulting in a larger reading error compared to the method in this embodiment where the marking portion 6 is directly fitted onto the outside of the spindle assembly 9.

[0197] like Figure 11 and Figure 13 As shown, a specific method is provided in which the marking part 6 and the mounting part 5 are limited in the axial and circumferential directions. The wall of the mounting hole 52 has a stepped structure, thereby defining the mounting hole 52 as a first hole segment 521 and a second hole segment 522, wherein the radial dimension of the first hole segment 521 is larger than the radial dimension of the second hole segment 522. The first hole segment 521 is closer to the second half-shell 83b.

[0198] See also Figure 13 The connecting hole 85 has a limiting flange 851 on its wall. The limiting flange 851 extends circumferentially along the connecting hole 85 and protrudes radially. When the mounting part 5 is connected to the second half shell 83b, the limiting flange 851 presses against the opening of the first hole section 521 and is located inside the opening of the first hole section 521.

[0199] The marking part 6 is disposed in the first hole section 521. One end face of the marking part 6 is pressed against the stepped surface 523 of the hole wall of the mounting hole 52, and the other end face is in contact with the limiting flange 851.

[0200] The side wall of the marking section 6 is provided with a limiting block (not shown in the figure), and the limiting block and the limiting groove provided in the wall of the first hole section 521 form a circumferential limiting.

[0201] Optionally, the marking part 6 is made of a light-transmitting material. The light-transmitting material can be a transparent or translucent material, such as acrylic or other plastic materials. The marking part 6 covers at least a portion of the mark. This allows the mark to be read through the marking part 6 and also prevents the mark from becoming contaminated or worn during the use of the actuator.

[0202] To achieve a seal for the actuator, the outer wall of the spindle assembly 9 is sealed to the bore wall 85a of the connecting hole 85. The bore wall 85a of the connecting hole 85 extends axially toward the side away from the mounting portion 5.

[0203] A mounting slot is provided around the spindle assembly 9. See also Figure 14 and Figure 15 A sealing ring 93 is provided in the mounting groove, and the axial cross section of the sealing ring 93 is V-shaped. The sealing ring 93 is partially pressed against the wall of the connecting hole 85, thereby achieving a sealed connection between the spindle assembly 9 and the wall of the connecting hole 85.

[0204] Of course, the axial cross section of the sealing ring 93 can also be in other shapes. When the external pressure on the spindle assembly 9 increases, the V-shaped sealing ring 93 can be squeezed and deformed, thus maintaining good sealing performance when the external pressure on the spindle assembly increases.

[0205] Optionally, see Figure 14 The sealing ring 93 also has a 93a, which protrudes axially from the main body of the sealing ring 93. A positioning cavity matching 93a is also provided in the mounting groove. The positioning cavity and 93a cooperate to provide positioning when the sealing ring 93 is installed.

[0206] In the above embodiments, the actuator further includes a transmission component that is driveably connected to the spindle assembly 9. The transmission component can be a gear transmission or a worm gear transmission.

[0207] An upper housing plate 73 is also provided inside the housing. The upper housing plate 73 is connected to the second half-shell 83b and forms a cavity. The transmission assembly is arranged radially within the cavity along the main shaft assembly 9. The main shaft assembly 9 is arranged perpendicular to the upper housing plate 73.

[0208] Specifically, the transmission assembly includes a sector gear 431. The spindle assembly 9 includes a spindle body 91, a mounting sleeve 94 sleeved on the spindle body 91, and a spindle connector 92. The spindle connector 92 and the mounting sleeve 94 are arranged axially and are both connected to the sector gear 431 to form a circumferential limit.

[0209] The aforementioned markings are affixed to the outer wall of the mounting sleeve 94. A sealing ring 93 is fitted onto the outer wall of the mounting sleeve 94. An marking portion 6 is also fitted over the mounting sleeve 94. The marking portion 6 is clearance-fitted with the mounting sleeve 94. The mounting sleeve 94 is rotatable relative to the marking portion 6.

[0210] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. An electric actuator, characterized in that, It includes a support assembly (7), a spindle assembly (9), and a feedback setting mechanism (1), wherein the feedback setting mechanism (1) includes: Trigger switch (11), the support component (7) is used to support the trigger switch (11); The connecting part (13) is connected to the spindle assembly (9) and can rotate synchronously with the spindle assembly (9); The trigger (12) is rotatably connected to the connecting part (13) and can be used in rotational operation and adjustment operation. The trigger (12) can be used with the trigger switch (11) in the initial feedback position. The trigger (12) includes a main body (121) and a limiting ring (123) disposed on the outside of the main body (121). The main body (121) of the trigger (12) is built into the connecting part (13), and the limiting ring (123) is sleeved on the outside of the connecting part (13). The limiting ring (123) includes a second ring segment (123b), which is elastic. A portion of the second ring segment (123b) is spaced apart from the outer wall of the connecting portion (13), and a portion abuts against the outer wall of the connecting portion (13). When the connecting part (13) and the trigger (12) are in the rotating condition, the trigger (12) and the connecting part (13) can rotate synchronously with the spindle assembly (9), and the trigger (12) rotates relative to the trigger switch (11) and deviates from the initial feedback position; When the connecting part (13) and the trigger (12) are engaged in the adjustment condition, the trigger (12) can rotate relative to the connecting part (13) to re-engage with the trigger switch (11) at the initial feedback position, so that the position memory of the current rotation angle is realized by the rotation of the trigger (12) while the spindle assembly (9) keeps the current rotation angle unchanged.

2. The electric actuator according to claim 1, characterized in that, The trigger (12) includes a main body (121) and a trigger end (122) disposed on the main body (121). The trigger end (122) and the trigger switch (11) form a point sensing or line sensing to cooperate with the initial feedback position. When the trigger terminal (122) and the trigger switch (11) are in line sensing, the endpoint on one side of the trigger terminal (122) is located at the initial feedback position.

3. The electric actuator according to claim 2, characterized in that, The spindle assembly (9) is capable of rotating within a set rotation angle α; When the trigger end (122) and the trigger switch (11) form a line induction, the center angle of the trigger end (122) is γ, α≤γ<360°.

4. The electric actuator according to claim 2, characterized in that, The second ring segment (123b) is provided with a plurality of limiting protrusions (123c) at the position where it abuts against the outer wall of the connecting part (13), and the connecting part (13) is provided with a mating protrusion (132a) that can mesh with the limiting protrusions (123c).

5. The electric actuator according to claim 4, characterized in that, The middle part of the second ring segment (123b) abuts against the connecting part (13), and the abutting part is radially symmetrically arranged with the trigger end (122) at the midpoint of the circumferential direction.

6. The electric actuator according to claim 1, characterized in that, The actuator also includes a housing (8), and the feedback setting mechanism (1) is disposed within the housing (8); The trigger (12) includes two ends arranged opposite each other along the axial direction, one of which extends out of the housing (8) and is provided with a first pointer (121d), and the housing (8) is also provided with a second pointer; When the first pointer (121d) and the second pointer are aligned, the trigger (12) and the trigger switch (11) are located at the initial feedback position.

7. The electric actuator according to claim 6, characterized in that, The housing (8) is provided with an inner cavity (81), and the end of the trigger (12) extends out of the housing (8) from the bottom of the inner cavity (81). The opening of the inner cavity (81) is provided with an openable cover plate (813), and the cover plate (813) is sealed to the opening of the inner cavity (81).

8. The electric actuator according to any one of claims 1-7, characterized in that, Also includes: A potentiometer assembly (2) is connected to the spindle assembly (9), and the potentiometer assembly (2) is configured such that the resistance of the potentiometer assembly (2) changes in response to the change in the rotation angle of the spindle assembly (9); The potentiometer assembly (2) is provided with a positioning element, which corresponds to the initial position of the resistance change of the potentiometer assembly (2). The spindle assembly (9) is provided with an adapter that can be plugged into the positioning element, which corresponds to the starting position of the spindle assembly (9).

9. The electric actuator according to any one of claims 1-7, characterized in that, include: The electric drive assembly has both energized and de-energized operating conditions; A hand drive access part (321) is provided on one side of the hand drive access part (321), and a sensing device (33b) is provided on the side of the hand drive access part (321). The hand drive access part (321) is connected to the spindle assembly (9) in a transmission manner. The hand drive plug (32) can be selectively inserted into the hand drive access part (321) to cooperate with the insertion station and the disengagement station. The hand drive plug (32) is provided with a trigger device (33a). The sensing device (33b) and the triggering device (33a) form a first sensing state and a second sensing state corresponding to the insertion station and the disengagement station, and the electric drive assembly switches between the power-off condition and the power-on condition according to the first sensing state and the second sensing state.

10. The electric actuator according to any one of claims 1-7, characterized in that, include: Power input components are used to provide power to the actuator; The power input assembly is connected to the main shaft assembly (9) via the gear transmission assembly (4).

11. The electric actuator according to any one of claims 1-7, characterized in that, include: The housing (8) contains the spindle assembly (9) partially located within the housing (8), and the housing (8) is marked. The mounting part (5) is connected and communicates with the housing (8), and the spindle assembly (9) extends from the housing (8) into the mounting part (5). The mounting part (5) is provided with a viewing window (51). The marking part (6) is connected to the mounting part (5). The window (51) is opposite to the mark and the marking part (6) along the radial direction of the spindle assembly (9). The spindle assembly (9) rotates to drive the mark to move relative to the marking part (6).

12. A valve, characterized in that, Includes the electric actuator as described in any one of claims 1-11.

Images