Actuator adjustment locking device

Abstract

The application discloses an actuator adjusting and locking device, and belongs to the field of adjusting and locking devices, which comprises a fixing ring, a first locking ring, a second locking ring, a locking piece and a joint; initial key grooves are evenly arranged on the fixing ring in the circumferential direction, and initial keys which can be matched with the initial key grooves are arranged on the first locking ring, so that initial angle adjustment of the device is realized; a plurality of subdivided key grooves are arranged on the first locking ring in the circumferential direction, a plurality of positioning holes which are spaced apart from each subdivided key groove by a subdivided angle are arranged on the second locking ring, then the second locking ring is rotated by different subdivided angles, so that the positioning holes and the subdivided key grooves in the corresponding group are aligned, and the device is locked by the positioning key, thereby realizing subdivided angle adjustment of the device, and forming a two-stage angle adjustment structure to realize fine division of the angle; and the joint is circumferentially locked on the second locking ring and can be axially moved by a corresponding length when the joint is rotated, so that the zero-length adjustment of the actuator is realized.

Description

Technical Field

[0001] This invention belongs to the field of actuator technology, specifically relating to an actuator adjustment and locking device. Background Technology

[0002] The servo motor and control surface in the actuator are connected to the fuselage via a revolute joint, and the linear displacement of the servo motor is converted into the deflection angle of the control surface. In actual assembly, due to machining and assembly errors, when the servo motor is at its zero length, the control surface will generally deviate from the designed zero angle. Therefore, it is usually necessary to adjust the servo motor's zero position by fine-tuning its zero length.

[0003] Currently, the commonly used methods for zeroing actuators are shim zeroing and nut zeroing. Shim zeroing requires multiple series of adjusting shims to be prepared in the field to achieve precise step adjustment, but this zeroing process requires disassembling the servo motor. Nut zeroing, on the other hand, does not require multiple adjusting shims or disassembling the servo motor, and can achieve stepless zeroing. However, the current nut zeroing method has lower adjustment accuracy and cannot achieve precise step adjustment. Summary of the Invention

[0004] In view of one or more of the above-mentioned defects or improvement needs of the prior art, the present invention provides an actuator adjustment locking device that can achieve fine division of angles when the radial dimension of the angle adjustment device is limited.

[0005] To achieve the above objectives, the present invention provides an actuator adjustment and locking device, which includes a fixed ring, a first locking ring, a second locking ring, a locking element, and a connector;

[0006] One end face of the fixed ring is provided with a fixing key that can be circumferentially fixed with the piston, and the other end face is provided with multiple initial keyways evenly arranged along the circumferential direction.

[0007] The first locking ring is disposed on the side of the fixed ring away from the piston. An initial key matching the initial keyway is provided on the end face of one end of the first locking ring, so as to match each of the initial keyways by means of the initial keyway and adjust the initial angle of the first locking ring relative to the fixed ring. Multiple subdivided keyways are arranged circumferentially on the end face of the first locking ring away from the fixed ring.

[0008] The second locking ring is disposed on the side of the first locking ring away from the fixed ring, and multiple positioning holes are provided on the second locking ring in a non-uniformly distributed manner along the circumferential direction. The multiple positioning holes are provided in a one-to-one correspondence with the multiple subdivision keyways and are spaced at a certain angle. When the second locking ring rotates at different subdivision angles, the positioning holes and subdivision keyways in each group are aligned in sequence, and the positioning keys pass through the aligned positioning holes and subdivision keyways in sequence to perform circumferential locking on the second locking ring and the first locking ring.

[0009] The locking element is used to lock the fixed ring, the first locking ring, and the second locking ring after the angle is adjusted;

[0010] The connector is circumferentially locked to the second locking ring, and one end of the connector passes through the second locking ring, the first locking ring and the fixing ring in sequence, and is threadedly connected to the piston.

[0011] As a further improvement of the present invention, the initial keyways are set to m, and numbered sequentially along the circumferential direction. When the initial key matches the i-th initial keyway, the initial angle α of the first locking ring rotation is... i It is 360°(i-1) / m.

[0012] As a further improvement of the present invention, the subdivision keyways are uniformly arranged in n numbers along the circumferential direction of the end face of the first locking ring, and are numbered sequentially along the circumferential direction. When the j-th subdivision keyway is aligned with the corresponding positioning hole, the second locking ring rotates by a subdivision angle β. j It is 360°(j-1) / mn.

[0013] As a further improvement of the present invention, the outer ring side of the first locking ring is provided with a protrusion corresponding to the first subdivision keyway, and a first recess is provided corresponding to the other subdivision keyways respectively; the outer ring side of the second locking ring is provided with a lug corresponding to the first positioning hole, and a second recess is provided corresponding to the other positioning holes respectively, so as to observe and align during angle adjustment.

[0014] As a further improvement of the present invention, a locking key is provided on the inner ring side of the second locking ring, and a locking keyway is provided on the end of the connector near the second locking ring along the axial direction, so as to realize circumferential locking between the second locking ring and the connector through key-slot cooperation, and the locking key can slide along the axial direction in the locking keyway.

[0015] As a further improvement of the present invention, the locking member includes a nut disposed on the side of the second locking ring opposite to the first locking ring and passing through the connector to tighten and lock at the end of the second locking ring.

[0016] As a further improvement of the present invention, the second locking ring is also provided with a first safety hole, and the nut is provided with a second safety hole, so that the second locking ring and the nut are fixedly connected by passing a safety wire through the first safety hole and the second safety hole in sequence.

[0017] As a further improvement of the present invention, a boss is provided on the end face of the second locking ring near one end of the first locking ring, and a notch is also provided on the end face of the first locking ring at the end where the subdivision keyway is provided, which can accommodate the boss. The boss can rotate a certain angle within the notch to limit the rotation range of the second locking ring.

[0018] As a further improvement of the present invention, the maximum angle θ by which the boss can rotate within the notch is:

[0019] θ>360°(n-1) / mn.

[0020] As a further improvement of the present invention, two flattened portions are also provided on the ring side of the fixing ring to facilitate rotation of the fixing ring using a wrench.

[0021] The aforementioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0022] In summary, the beneficial effects of the above-described technical solutions conceived by this invention compared with the prior art include:

[0023] (1) The actuator adjustment and locking device of the present invention realizes the initial angle adjustment of the device through the key-groove cooperation between the fixed ring and the first locking ring. By aligning the initial keyway in the corresponding group with the positioning hole and locking it with the positioning key, the device can be subdivided into angles. The two-level angle adjustment structure formed by the initial angle adjustment and the subdivided angle adjustment realizes the fine division of the angle. By locking the joint circumferentially on the second locking ring and being able to move the corresponding length in the axial direction when rotating the angle, the zero position length of the actuator can be adjusted.

[0024] (2) The actuator adjustment and locking device of the present invention provides a protrusion and a plurality of first recesses on the first locking ring corresponding to each subdivided keyway, and provides a lug and a plurality of second recesses on the second locking ring corresponding to each positioning hole, so that when adjusting the angle, the position alignment between the protrusion and the lug or the first recess and the second recess is observed to determine whether the rotation is in place.

[0025] (3) The actuator adjustment locking device of the present invention provides a nut in the locking member and locks the nut against the end side of the second locking ring, thereby preventing the first locking ring and the second locking ring from sliding along the joint and causing the key to fall out of the keyway and resulting in angle adjustment failure; at the same time, the nut and the second locking ring are fixed together by a fuse, so that the nut is always kept against the end side of the second locking ring, thereby preventing the nut from rotating unnecessarily and achieving locking of the device adjustment angle.

[0026] (4) The actuator adjustment locking device of the present invention, by setting a boss and a notch between the first locking ring and the second locking ring, restricts the rotation angle of the boss in the notch and restricts the rotation angle range of the second locking ring, so as to avoid angle adjustment errors.

[0027] (5) The actuator adjustment and locking device of the present invention has a simple structure, is easy to adjust and operate. It achieves fine division of angle through the servo angle adjustment structure. During the zeroing process, the servo does not need to be disassembled, and fine zero position adjustment can be achieved. It has good application prospects and promotion value. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is an exploded view of the overall structure of the actuator adjustment and locking device in an embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram of the structure of the second locking ring in an embodiment of the present invention;

[0031] Figure 3 This is a schematic diagram of the assembly structure of the actuator adjustment and locking device in an embodiment of the present invention.

[0032] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1. retaining ring; 11. retaining key; 12. initial keyway; 13. flattened portion; 2. first locking ring; 21. initial key; 22. subdivision keyway; 23. protrusion; 24. first recess; 25. notch; 3. second locking ring; 31. lug; 32. second recess; 33. positioning hole; 34. locking key; 35. first safety hole; 36. boss; 4. positioning key; 5. nut; 51. second safety hole; 6. connector; 61. locking keyway; 7. piston; 71. retaining keyway. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0034] In the description of this invention, it should be understood that, unless otherwise expressly specified and limited, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0035] Furthermore, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

[0036] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0037] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0038] Example:

[0039] Please see Figures 1-3In a preferred embodiment of the present invention, the actuator adjustment and locking device includes a fixed ring 1, a first locking ring 2, a second locking ring 3, a locking member, and a connector 6. The primary angle adjustment of the device is achieved by rotating the first locking ring 2 relative to the fixed ring 1, the finer angle adjustment of the device is achieved by rotating the second locking ring 3 relative to the first locking ring 2, and the adjustment angle is locked by the locking member.

[0040] Specifically, such as Figure 1 As shown in the preferred embodiment, a piston 7 is provided on one side of the fixing ring 1. Multiple fixing keys 11 are provided on the end face of the fixing ring 1 near the piston 7, and multiple fixing keyways 71 are matchedly provided on the end face of the piston 7 near the fixing ring 1, so as to achieve circumferential fixation between the fixing ring 1 and the piston 7 through the fixing keys 11 and the fixing keyways 71. Simultaneously, multiple initial keyways 12 are provided on the end face of the fixing ring 1 opposite to the piston 7, and the multiple initial keyways 12 are evenly arranged circumferentially.

[0041] Preferably, two flattened portions 13 are symmetrically provided on the ring side of the fixing ring 1 to facilitate the rotation of the fixing ring 1 using a wrench.

[0042] Furthermore, in the preferred embodiment, the first locking ring 2 is disposed on the side of the fixed ring 1 away from the piston 7. The end face of the first locking ring 2 near the fixed ring 1 is provided with an initial key 21 that matches the initial keyway 12. There can be one or more initial keys 21, so that the circumferential locking between the fixed ring 1 and the first locking ring 2 can be achieved by matching the initial key 21 with the initial keyway 12. By matching the initial key 21 with different initial keyways 12, the locking angle between the first locking ring 2 and the fixed ring 1 can be adjusted, thereby adjusting the initial angle of the device.

[0043] It is understandable that when the number of initial keyways 12 is m, the m initial keyways 12 divide the circumference of one end face of the fixing ring 1 into m equal parts, and the angle of each part is 360° / m, that is, the included angle between two adjacent initial keyways 12 is 360° / m. The multiple initial keyways 12 and initial keys 21 are numbered sequentially, and the initial adjustment angle when the first initial key 21 matches the first initial keyway 12 is set to zero. Since the included angle between two adjacent initial keyways 12 is 360° / m, the initial angle α of the first locking ring 2 when rotating it to match the first initial key 21 with the i-th initial keyway 12 is... i It is 360°(i-1) / m.

[0044] Meanwhile, a plurality of subdivision keyways 22 are provided at the other end of the first locking ring 2 away from the fixed ring 1. The plurality of subdivision keyways 22 are arranged uniformly or unevenly along the end face of the first locking ring 2.

[0045] Furthermore, such as Figure 2 As shown in the preferred embodiment, the second locking ring 3 is disposed on the side of the first locking ring 2 away from the fixed ring 1, and a plurality of positioning holes 33 are provided on the second locking ring 3. The plurality of positioning holes 33 are non-uniformly distributed along the circumference of the second locking ring 3. The plurality of positioning holes 33 correspond one-to-one with the subdivision keyways 22 on the first locking ring 2, and the subdivision keyways 22 and the positioning holes 33 in each group are spaced apart by a certain angle. That is, when the positioning holes 33 in one group are aligned with the subdivision keyways 22, the positioning holes 33 in other groups and the subdivision keyways 22 form a certain included angle, and the included angle formed by each group is different in size. The included angles of different sizes form a plurality of subdivision angles, so that the second locking ring 3 rotates relative to the first locking ring 2 by different subdivision angles, and the positioning holes 33 and the subdivision keyways 22 in each group are aligned in sequence.

[0046] It is understandable that when the number of subdivision keyways 22 is n and they are evenly arranged circumferentially, the n subdivision keyways 22 will evenly divide the end face circumference of the first locking ring 2 into n parts, each part having an angle of 360° / n, that is, the included angle between two adjacent subdivision keyways 22 is 360° / n. Since the subdivision angle in this invention is a further refinement of the initial angle formed by the keyway fit on the fixed ring 1, the angle interval of 360° / m on the fixed ring 1 is further subdivided into n parts, preferably equally spaced, so the subdivision angle interval is 360° / mn. The multiple subdivision keyways 22 and positioning holes 33 are numbered sequentially, and the first subdivision keyway 22 and the first positioning hole 33 are aligned as the initial position, that is, the subdivision angle at the initial position is zero. Then, the angle that needs to be rotated when the j-th subdivision keyway 22 and the j-th positioning hole 33 are aligned is set to 360°(j-1) / mn.

[0047] Accordingly, after the positioning hole 33 is aligned with the corresponding subdivision keyway 22, the positioning key 4 is sequentially inserted into the positioning hole 33 and the subdivision keyway 22 to perform circumferential positioning and locking of the first locking ring 2 and the second locking ring 3.

[0048] It is understandable that the engagement of the initial key 21 on the first locking ring 2 with the corresponding initial keyway 12 on the fixed ring 1 determines an initial angle of 360°(i-1) / m. The positioning hole 33 on the second locking ring 3 and the corresponding subdivision keyway 22 on the first locking ring 2 determine a subdivision angle of 360°(j-1) / mn. The final adjustment angle is obtained by adding the initial angle and the subdivision angle. Therefore, the final adjustment angle is 360°(i-1) / m + 360°(j-1) / mn, which realizes a more precise angle adjustment of the device.

[0049] Preferably, a protrusion 23 is provided on the first locking ring 2 ring side corresponding to the first subdivision keyway 22, and a first recess 24 is provided on the other subdivision keyways 22 respectively, so that the protrusion 23 and the first recess 24 can be used for observation and alignment when adjusting the angle.

[0050] Meanwhile, a lug 31 is provided on the outer ring side of the second locking ring 3 corresponding to the first positioning hole 33, and a second recess 32 is provided on the other positioning holes 33 respectively. In actual use, when the lug 31 on the second locking ring 3 is aligned with the protrusion 23 on the first locking ring 2, the first positioning hole 33 is aligned with the first subdivision keyway 22, and the subdivision angle is zero. The second locking ring 3 rotates counterclockwise, so that the second recess 32 on the second locking ring 3 in each group is aligned with the first recess 24 on the first locking ring 2 in sequence. Then, the positioning hole 33 in each group is aligned with the corresponding subdivision keyway 22 in sequence, reaching each subdivision angle in sequence. Then, when adjusting the angle, the corresponding subdivision angle is determined by observing the alignment of the protrusion 23 and the lug 31, the first recess 24 and the second recess 32.

[0051] Preferably, a boss 36 is provided on the end face of the second locking ring 3 near the end of the first locking ring 2, and a notch 25 is provided on the end face of the first locking ring 2 at the end where the subdivision keyway 22 is provided, which can accommodate the boss 36. The boss 36 can rotate a certain angle within the notch 25, so as to limit the rotation angle range of the second locking ring 3 by the angle, and avoid excessive adjustment of the subdivision angle due to operational errors.

[0052] Preferably, the maximum angle θ that the boss 36 can rotate within the notch 25 is:

[0053] θ>360°(n-1) / mn,

[0054] That is, the maximum angle θ that the boss 36 can rotate within the notch 25 is greater than the maximum adjustable subdivision angle, so as not to affect the angle adjustment of the second locking ring 3.

[0055] More preferably, the maximum angle θ that the boss 36 can rotate within the notch 25 is:

[0056] 360°(n-1) / mn<θ<360° / m,

[0057] That is, the maximum angle θ that the boss 36 can rotate within the notch 25 is greater than the maximum adjustable subdivision angle, but less than the minimum adjustable initial angle, thus limiting the range of rotation of the second locking ring 3 to within the minimum initial angle.

[0058] Furthermore, the end of the connector 6 near the second locking ring 3 is provided with an external thread, which passes through the second locking ring 3, the second locking ring 3 and the fixing ring 1 in sequence, and is screwed into the piston 7 and threadedly connected to the piston 7; at the same time, at least one elongated locking keyway 61 is provided on the outer peripheral wall of the connector 6 along the axial direction, and at least one locking key 34 is provided on the inner ring side of the second locking ring 3, so as to achieve circumferential locking between the second locking ring 3 and the connector 6 through key-slot cooperation.

[0059] like Figure 3 As shown, the fixed key 11 engages with the fixed keyway 71, the initial keyway 12 engages with the initial key 21 corresponding to the initial angle, the subdivision keyway 22 corresponding to the subdivision angle engages with the positioning hole 33, and the locking key 34 engages with the locking keyway 61. The sum of the angles adjusted by the first locking ring 2 and the second locking ring 3 is the rotation angle of the connector 6 relative to the piston 7, thereby realizing the angle adjustment of the connector 6 relative to the piston 7. Correspondingly, since the connector 6 has threads, after the connector 6 rotates by a certain angle, it can move a corresponding length in the axial direction, thus realizing the fine adjustment of the zero-position length of the actuator.

[0060] Furthermore, the locking element is used to lock the fixed ring 1, the first locking ring 2, and the second locking ring 3 after the angle adjustment, to prevent them from sliding along the joint 6, which would cause each set of keys to come out of the keyway and the angle adjustment to fail.

[0061] Preferably, the locking component includes a nut 5, which is disposed on the side of the second locking ring 3 opposite to the first locking ring 2 and passes through the connector 6 to tighten and lock the end of the second locking ring 3; at the same time, a first safety hole 35 is provided on the second locking ring 3 and a second safety hole 51 is provided on the nut 5, so that the nut 5 and the second locking ring 3 are fixed together by passing a safety wire through the first safety hole 35 and the second safety hole 51 in sequence, so as to prevent the nut 5 from rotating, thereby realizing the locking of the device for adjusting the angle.

[0062] The actuator adjustment and locking device of this invention has a simple structure, is easy to adjust and operate. It achieves precise angle division through the servo angle adjustment structure. During the zeroing process, there is no need to disassemble the servo, which can achieve precise zero position adjustment. It has good application prospects and promotion value.

[0063] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An actuator adjustment and locking device, characterized in that, Includes a retaining ring, a first locking ring, a second locking ring, a locking element, and a connector; One end face of the fixed ring is provided with a fixing key that can be circumferentially fixed with the piston, and the other end face is provided with multiple initial keyways evenly arranged along the circumferential direction. The first locking ring is disposed on the side of the fixed ring away from the piston. An initial key matching the initial keyway is provided on the end face of one end of the first locking ring, so as to match each of the initial keyways by means of the initial keyway and adjust the initial angle of the first locking ring relative to the fixed ring. Multiple subdivided keyways are arranged circumferentially on the end face of the first locking ring opposite to the fixed ring. The second locking ring is disposed on the side of the first locking ring opposite to the fixed ring, and multiple positioning holes are provided on the second locking ring in a non-uniformly distributed manner along the circumferential direction. The multiple positioning holes are provided in a one-to-one correspondence with the multiple subdivision keyways, and are spaced at a certain angle. When the second locking ring rotates at different subdivision angles, the positioning holes and subdivision keyways in each group are aligned in sequence. Positioning keys are sequentially inserted into the aligned positioning holes and subdivision keyways to perform circumferential locking on the second locking ring and the first locking ring. The initial keyways are set to m, and numbered sequentially along the circumference. When the initial key matches the i-th initial keyway, the first locking ring rotates at an initial angle α. i It is 360°(i-1) / m; The subdivision keyways are evenly arranged in n numbers along the circumferential direction of the end face of the first locking ring, and are numbered sequentially along the circumferential direction. When the j-th subdivision keyway is aligned with the corresponding positioning hole, the second locking ring rotates by a subdivision angle β. j It is 360°(j-1) / mn; The locking element is used to lock the fixed ring, the first locking ring, and the second locking ring after the angle is adjusted; The connector is circumferentially locked to the second locking ring, and one end of the connector passes through the second locking ring, the first locking ring and the fixing ring in sequence, and is threadedly connected to the piston.

2. The actuator adjustment and locking device according to claim 1, characterized in that, The outer ring side of the first locking ring has a protrusion corresponding to the first subdivision keyway, and a first recess corresponding to each of the other subdivision keyways; the outer ring side of the second locking ring has a lug corresponding to the first positioning hole, and a second recess corresponding to each of the other positioning holes, so as to observe and align during angle adjustment.

3. The actuator adjustment and locking device according to claim 1, characterized in that, The second locking ring has a locking key on its inner ring side, and a locking keyway is provided on the end of the connector near the second locking ring along the axial direction, so as to realize circumferential locking between the second locking ring and the connector through key-slot cooperation, and the locking key can slide along the axial direction in the locking keyway.

4. The actuator adjustment and locking device according to claim 1, characterized in that, The locking element includes a nut disposed on the side of the second locking ring opposite to the first locking ring and passing through the connector to tighten and lock at the end of the second locking ring.

5. The actuator adjustment and locking device according to claim 4, characterized in that, The second locking ring is also provided with a first safety hole, and the nut is provided with a second safety hole, so that the second locking ring and the nut are fixedly connected by passing a safety wire through the first safety hole and the second safety hole in sequence.

6. The actuator adjustment and locking device according to any one of claims 1 to 5, characterized in that, A boss is provided on the end face of the second locking ring near the end of the first locking ring, and a notch is also provided on the end face of the first locking ring at the end where the subdivision keyway is provided, which can accommodate the boss. The boss can rotate a certain angle within the notch to limit the rotation range of the second locking ring.

7. The actuator adjustment and locking device according to claim 6, characterized in that, The maximum angle θ that the boss can rotate within the notch is: θ>360°(n-1) / mn.

8. The actuator adjustment and locking device according to claim 1, characterized in that, The fixing ring also has two flattened portions on its ring side to facilitate rotation of the fixing ring using a wrench.

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