阅读说明：本技术 一种作动器机械零位锁、作动器及运输装置 (Actuator mechanical zero position lock, actuator and transportation device ) 是由 肖中卓 张新华 黄建 郑欢 郑美媛 李勇 钱帅 周围 赵帆 胡亚鹏 于 2021-06-30 设计创作，主要内容包括：本发明提供了一种作动器机械零位锁、作动器及运输装置,该机械零位锁包括：固定块、输出端锁紧组件、长度调节筒、第一锁紧螺母和第二锁紧螺母,固定块设置在作动器的机体上且设置有第一螺纹杆；输出端锁紧组件设置在作动器的输出端零件上,且其上设置有与第一螺纹杆的螺纹方向相反的第二螺纹杆；长度调节筒的内壁上具有螺纹方向相反的第一段内螺纹和第二段内螺纹,第一段内螺纹与第一螺纹杆相配合,第二段内螺纹与第二螺纹杆相配合；通过调节第一锁紧螺母与第二锁紧螺母将长度调节筒的轴向锁紧。应用本发明的技术方案,以解决现有技术中机械零位锁占用空间大、存在结构干涉、不能满足伺服作动器零位调整全行程需求且不能调节长度的技术问题。(The invention provides an actuator mechanical zero position lock, an actuator and a transportation device, wherein the mechanical zero position lock comprises: the length adjusting mechanism comprises a fixed block, an output end locking assembly, a length adjusting cylinder, a first locking nut and a second locking nut, wherein the fixed block is arranged on a machine body of the actuator and is provided with a first threaded rod; the output end locking assembly is arranged on an output end part of the actuator and is provided with a second threaded rod with the direction opposite to the thread direction of the first threaded rod; the inner wall of the length adjusting cylinder is provided with a first section of internal threads and a second section of internal threads, wherein the thread directions of the first section of internal threads and the second section of internal threads are opposite, the first section of internal threads are matched with the first threaded rod, and the second section of internal threads are matched with the second threaded rod; the axial direction of the length adjusting cylinder is locked by adjusting the first locking nut and the second locking nut. By applying the technical scheme of the invention, the technical problems that a mechanical zero position lock in the prior art occupies a large space, has structural interference, cannot meet the requirement of the servo actuator on zero position adjustment full stroke and cannot adjust the length are solved.)

1. An actuator mechanical zero position lock, comprising:

the fixing block (1), the fixing block (1) is arranged on a machine body (21) of the actuator, and a first threaded rod (1a) is arranged on the fixing block (1);

an output end locking assembly arranged on an output end part (22) of the actuator, the output end locking assembly being provided with a second threaded rod (14) in a direction opposite to the thread direction of the first threaded rod (1 a);

the length adjusting barrel (4) is arranged between the fixed block (1) and the locking assembly and is coaxial with the first threaded rod (1a) and the second threaded rod (14), the length adjusting barrel (4) is a cylindrical component with two open ends, a first section of internal thread (12) and a second section of internal thread (13) with opposite thread directions are arranged on the inner wall of the length adjusting barrel (4), the first section of internal thread (12) is matched with the first threaded rod (1a), and the second section of internal thread (13) is matched with the second threaded rod (14);

a first lock nut disposed on the first threaded rod (1a) between the fixed block (1) and the length adjustment barrel (4);

and the second locking nut is arranged on the second threaded rod (14) between the length adjusting barrel (4) and the output end locking assembly, and the first locking nut and the second locking nut are used for locking the length adjusting barrel (4) in the axial direction through adjustment.

2. The mechanical zero position lock as claimed in claim 1, characterized in that the output end locking assembly comprises a first locking part (7) and a second locking part (8), and the first locking part (7) and the second locking part (8) are fixed together in a manner of pressing the output end part (22).

3. The mechanical zero bit lock as claimed in claim 2, characterized in that the output end locking assembly further comprises an output end locking screw (10), the first locking part (7) is provided with a through hole (17), the second locking part (8) is provided with a threaded hole (18), and the output end locking screw (10) penetrates through the through hole (17) to be matched with the threaded hole (18).

4. Mechanical zero lock according to claim 3, characterized in that the first locking part (7) and the second locking part (8) each have an inner surface that follows the outer surface of the outlet fitting (22).

5. Mechanical zero lock according to claim 3, characterized in that the first locking part (7) and the second locking part (8) are both of a housing construction with a recess in which the output end piece (22) is arranged.

6. Mechanical zero position lock according to claim 5, characterized in that the first locking part (7) and the second locking part (8) have a distance H therebetween.

7. The mechanical zero position lock of claim 6, wherein the number of the first lock nuts is two, and the number of the second lock nuts is two.

8. Mechanical zero bit lock according to any of claims 1 to 7, characterized in that the length adjustment barrel (4) has a plurality of flats (11) on its outer wall, the plurality of flats (11) being adapted to cooperate with tooling to rotate the length adjustment barrel (4).

9. An actuator comprising a mechanical zero lock as claimed in any one of claims 1 to 8.

10. A transportation device comprising an actuator according to claim 9.

Technical Field

The invention relates to the technical field of actuators, in particular to a mechanical zero position lock of an actuator, the actuator and a transportation device.

Background

When the rocket engine is integrally loaded and transported, the cantilever is long and the structure of the spray pipe is weak, so that the fatigue damage of the flange and the connecting support plate of the spray pipe is easily caused by low-frequency random vibration and impact in the long-time transportation process. In order to not influence the working reliability of the engine, a special transport case can be selected to transport the jet pipe of the engine independently, and the jet pipe is installed on the engine after the rocket reaches a launching site, however, the process restricts the launching period of the rocket, and the requirement of high-density launching of the rocket cannot be met.

At present, the solutions for integrally loading and transporting the engine include several schemes such as a flexible inhaul cable, a rigid pull rod, a band-type brake of a servo actuator, a mechanical zero position lock of the servo actuator and the like. The flexible cable scheme can relieve transportation vibration and impact, but has an unobvious protective effect on an engine, the rigid pull rod scheme is widely applied at present, but the flexible cable scheme and the rigid pull rod scheme need to disassemble cables or pull rods after loading and transporting arrows, replace servo actuators and need a certain period for disassembly and assembly; the scheme that the servo actuator is provided with the band-type brake saves the replacing time, but is limited by the size of the servo actuator, the locking force of the actuator which can be provided by the band-type brake is very limited, and meanwhile, the band-type brake is arranged, so that a control circuit is added, and the overall reliability is reduced; the servo actuator is provided with a mechanical zero position lock, an engine spray pipe is not needed to be integrally replaced with the servo actuator, the period is shortened, the reliability of a servo system is improved due to the fact that a control circuit of a band-type brake is not needed, meanwhile, the existing structure of the servo actuator can be used for carrying out adaptive design of the mechanical zero position lock, the locking force and the rigidity of the servo actuator can also be flexibly designed according to the overall requirement, and the servo actuator is a convenient and effective way for solving the problem of integrally loading and transporting the engine spray pipe.

However, the mechanical zero position lock commonly used for the electromechanical actuator at present is cylindrical, occupies a large space, does not have a length adjusting function, and cannot meet the requirement of spray pipe transportation. Firstly, aiming at a narrow space between an engine spray pipe and an electromechanical actuator, the appearance of a cylinder can cause structural interference, and the requirement of the servo electromechanical actuator for zero adjustment of a full stroke is not met; secondly, the difference in the cold and hot states of the engine nozzle can cause the zero position length of the electromechanical actuator to change, and a mechanical zero position lock is required to be provided with the capacity of length adjustment.

Disclosure of Invention

The invention provides an actuator mechanical zero position lock, an actuator and a transportation device, and can solve the technical problems that in the prior art, the mechanical zero position lock occupies a large space, has structural interference, cannot meet the requirement of a servo actuator for zero position adjustment full stroke, and cannot adjust the length.

According to an aspect of the present invention, there is provided an actuator mechanical zero position lock, the mechanical zero position lock comprising:

the fixed block is arranged on the machine body of the actuator and is provided with a first threaded rod;

the output end locking assembly is arranged on an output end part of the actuator, and a second threaded rod with the opposite direction to the thread direction of the first threaded rod is arranged on the output end locking assembly;

the length adjusting cylinder is a cylindrical component with openings at two ends, and the inner wall of the length adjusting cylinder is provided with a first section of internal thread and a second section of internal thread which have opposite thread directions;

the first locking nut is arranged on a first threaded rod between the fixed block and the length adjusting cylinder;

and the second locking nut is arranged on a second threaded rod between the length adjusting barrel and the output end locking assembly, and the length adjusting barrel is axially locked by adjusting the first locking nut and the second locking nut.

Further, the output end locking assembly comprises a first locking portion and a second locking portion, and the first locking portion and the second locking portion are fixed together in a mode of pressing the output end part.

Further, the output end locking assembly further comprises an output end locking screw, a through hole is formed in the first locking portion, a threaded hole is formed in the second locking portion, and the output end locking screw penetrates through the through hole to be matched with the threaded hole.

Further, the first locking portion and the second locking portion each have an inner surface conforming to an outer surface of the output end member.

Further, first locking portion and second locking portion are the shell structure who has the recess, and output end part sets up in the recess.

Further, the first locking portion and the second locking portion have a distance H therebetween.

Further, the number of the first lock nuts is two, and the number of the second lock nuts is two.

Further, a plurality of planes are arranged on the outer wall of the length adjusting cylinder, and the planes are used for being matched with the tool to rotate the length adjusting cylinder.

According to another aspect of the present invention, there is provided an actuator comprising a mechanical zero lock according to the invention as set out above.

According to a further aspect of the invention there is provided a transportation device comprising an actuator as set out above.

By applying the technical scheme of the invention, the mechanical zero position lock of the actuator, the actuator and the transportation device are provided, the mechanical zero position lock realizes the reliable connection with the actuator through the fixed block and the output end locking component, the first threaded rod is arranged on the fixed block, the second threaded rod is arranged on the output end locking component, the first section of internal thread and the second section of internal thread with opposite thread directions are arranged on the length adjusting cylinder, the matching of the first section of internal thread and the first threaded rod and the matching of the second section of internal thread and the second threaded rod are realized, the adjustment of the connection length among the first threaded rod, the second threaded rod and the length adjusting cylinder are realized by fully utilizing the left-right thread screwing principle, the axial locking of the length adjusting cylinder is realized by utilizing the first locking nut and the second locking nut, the whole mechanical zero position lock has simple structure, reliable locking and high rigidity and strength, can bear high thrust, and can be through the change of length adjustment in order to adapt to actuator zero position length, can realize the reliable adjustable locking to the actuator, simultaneously, this machinery zero position lock overall arrangement is compact, and it is convenient to install, need not to carry out special improvement to servo actuator structure, can not produce the structure and interfere, can adapt to narrow and small space, satisfies the demand of servo actuator zero adjustment full stroke. Compared with the prior art, the technical scheme of the invention can solve the technical problems that a mechanical zero position lock in the prior art occupies a large space, has structural interference, cannot meet the requirement of the servo actuator for adjusting the full stroke at the zero position and cannot adjust the length.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

FIG. 1 illustrates a side view of a mechanical zero position lock provided in accordance with a specific embodiment of the present invention;

FIG. 2 illustrates a top view of a mechanical zero position lock provided in accordance with a specific embodiment of the present invention;

FIG. 3 illustrates a cross-sectional view of a mechanical zero position lock provided in accordance with a specific embodiment of the present invention;

FIG. 4 illustrates an assembled schematic view of an output lock assembly of the mechanical zero position lock provided in accordance with an exemplary embodiment of the present invention;

FIG. 5 illustrates an exploded view of a mechanical zero position lock provided in accordance with a specific embodiment of the present invention;

FIG. 6 illustrates a schematic exterior view of a length adjustment barrel provided in accordance with a specific embodiment of the present invention;

FIG. 7 illustrates a cross-sectional view of a length adjustment barrel provided in accordance with a particular embodiment of the present invention;

fig. 8 shows a schematic external view of a first locking portion provided according to a specific embodiment of the present invention;

FIG. 9 shows a cross-sectional view of the first locking portion of FIG. 8;

fig. 10 is a schematic external view of a second locking portion provided according to an embodiment of the present invention;

fig. 11 shows a cross-sectional view of the second locking portion of fig. 10.

Wherein the figures include the following reference numerals:

1. a fixed block; 1a, a first threaded rod; 2. a first left-hand locking nut; 3. a second left-hand locknut; 4. a length adjustment barrel; 5. a first right-handed locknut; 6. a second right-handed locknut; 7. a first locking portion; 8. a second locking portion; 9. locking screws of the fixed blocks; 10. the output end locks the screw; 11. a plane; 12. a first section of internal threads; 13. a second section of internal threads; 14. a second threaded rod; 15. an upper semicircular locking surface; 16. an upper semicircular axial matching surface; 17. a via hole; 18. a threaded hole; 19. a lower semi-circle axial matching surface; 20. a lower semicircular locking surface; 21. a body; 22. an output end part; H. the first locking part and the second locking part are arranged at intervals.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

As shown in fig. 1, 2 and 5, according to an embodiment of the present invention, there is provided an actuator mechanical zero lock, including:

the actuator comprises a fixed block 1, wherein the fixed block 1 is arranged on a machine body 21 of the actuator, and a first threaded rod 1a is arranged on the fixed block 1;

an output end locking assembly arranged on an output end part 22 of the actuator, and provided with a second threaded rod 14 with the opposite thread direction to the first threaded rod 1 a;

the length adjusting cylinder 4 is arranged between the fixed block 1 and the locking assembly and is coaxial with the first threaded rod 1a and the second threaded rod 14, the length adjusting cylinder 4 is a cylindrical component with two open ends, the inner wall of the length adjusting cylinder is provided with a first section of internal thread 12 and a second section of internal thread 13, the thread directions of the first section of internal thread 12 are opposite to that of the second section of internal thread 13, the first section of internal thread 12 is matched with the first threaded rod 1a, and the second section of internal thread 13 is matched with the second threaded rod 14;

the first locking nut is arranged on the first threaded rod 1a between the fixed block 1 and the length adjusting cylinder 4;

and the second locking nut is arranged on a second threaded rod 14 between the length adjusting barrel 4 and the output end locking assembly, and the axial direction of the length adjusting barrel 4 is locked by adjusting the first locking nut and the second locking nut.

In the invention, the fixing block 1 is provided with a plurality of mounting holes for fixedly connecting with the machine body 21 of the actuator, as shown in fig. 5, the mounting holes are symmetrically arranged on the fixing block 1, and the fixing block locking screws 9 pass through the mounting holes to fix the fixing block 1 on the machine body 21. As a specific embodiment of the present invention, the thread on the first threaded rod 1a is a left-handed thread, the fixed-end lock nut has a left-handed thread and is fitted over the first threaded rod 1a, the thread of the second threaded rod 14 is a right-handed thread, the output-end lock nut has a right-handed thread and is fitted over the second threaded rod 14, the thread distribution on the inner wall of the length adjustment cylinder 4 is shown in fig. 7, the first section of internal thread 12 is provided on the inner wall on the left side and is a left-handed thread, the second section of internal thread 13 is provided on the inner wall on the right side and is a right-handed thread, the first threaded rod 1a is inserted into the length adjustment cylinder 4 from the left side to be matched with the first section of internal thread 12 on the inner wall thereof, the second threaded rod 14 is inserted into the length adjustment cylinder 4 from the right side to be matched with the second section of internal thread 13 on the inner wall thereof, the matched state is shown in fig. 3, and the length adjustment can be achieved by screwing the first lock nut on the left side of the length adjustment cylinder 4 and the second lock nut on the right side of the length adjustment cylinder 4 And (4) axially locking the section tube 4. When the jet pipe is transported, the zero position length of the actuator can be adjusted along with the factors such as the installation size tolerance of the jet pipe, the change of the engine hot trial run preset angle and the like, and the mechanical zero position lock is required to have a corresponding length adjustment range. In the invention, the first threaded rod 1a, the second threaded rod 14 and the length adjusting cylinder 4 are coaxial, so when the mechanical zero position length of the actuator is changed, the first locking nut and the second locking nut only need to be unscrewed, then the length adjusting cylinder 4 is rotated, the length adjustment of the mechanical lock can be realized by utilizing the left-right screwing principle, and the first locking nut and the second locking nut are screwed after the adjustment is in place to axially lock the length adjusting cylinder 4.

In addition, in the above related thread structure, the larger the thread diameter is, the smaller the thread pitch is, the more the number of the threaded connection buttons is, the higher the safety margin and reliability in the thread fastening and force transmission are, and accordingly, the higher the safety margin and reliability of the mechanical zero position lock provided by the invention is, during actual use, the size of the linear thrust which needs to be borne by the mechanical lock is estimated according to the application scene of the actuator, and then the diameter, the thread pitch and the number of the threaded connection buttons are designed according to the size of the linear thrust so as to meet the use requirements. Preferably, in order to improve the connection strength in a limited space, the mechanical zero position lock adopts large-diameter multi-thread fine threads, namely, the first threaded rod 1a and the second threaded rod 14 are both fine threads and are in matched connection with the length adjusting cylinder 4 through the fine threads, so that the high-strength connection and locking of the mechanical zero position lock are realized.

By applying the configuration mode, the mechanical zero position lock of the actuator is provided, the mechanical zero position lock realizes reliable connection with the actuator through the fixed block 1 and the output end locking component, the first threaded rod 1a is arranged on the fixed block 1, the second threaded rod 14 is arranged on the output end locking component, the first section of internal thread 12 and the second section of internal thread 13 with opposite thread directions are arranged on the length adjusting cylinder 4, the matching of the first section of internal thread 12 and the first threaded rod 1a and the matching of the second section of internal thread 13 and the second threaded rod 14 are realized, the adjustment of the connection length among the first threaded rod 1a, the second threaded rod 14 and the length adjusting cylinder 4 is realized by fully utilizing the left-right thread screwing principle, the axial locking of the length adjusting cylinder 4 is realized by utilizing the first locking nut and the second locking nut, the whole mechanical zero position lock has simple structure and reliable locking, rigidity and intensity are high, can bear high thrust, and can be through the change of length adjustment in order to adapt to actuator zero position length, can realize the reliable adjustable locking to the actuator, and simultaneously, this machinery zero position lock overall arrangement is compact, and it is convenient to install, need not to carry out special improvement to servo actuator structure, can not produce the structure and interfere, can adapt to narrow and small space, satisfies servo actuator's zero adjustment full stroke demand. Compared with the prior art, the technical scheme of the invention can solve the technical problems that a mechanical zero position lock in the prior art occupies a large space, has structural interference, cannot meet the requirement of the servo actuator for adjusting the full stroke at the zero position and cannot adjust the length.

As a specific embodiment of the present invention, the number of the first lock nuts is two, and the number of the second lock nuts is two. As shown in fig. 3 and 5, the first locking nut includes two left-handed locking nuts, which are respectively the first left-handed locking nut 2 and the second left-handed locking nut 3 in the drawing, and the second locking nut includes two right-handed locking nuts, which are respectively the first right-handed locking nut 5 and the second right-handed locking nut in the drawing, in this configuration, the first threaded rod 1a and the second threaded rod 14 are subjected to additional tension and additional friction by the opposite vertex action of the two nuts, so that the anti-loose performance of the threaded connection is improved, and sufficient locking force is provided for the mechanical zero-position lock, thereby realizing high-rigidity connection and locking of the mechanical zero-position lock.

Further, referring to fig. 4, the output end locking assembly includes a first locking portion 7 and a second locking portion 8, and the first locking portion 7 and the second locking portion 8 are fixed together in a manner of pressing the output end part 22. First threaded rod 1a sets up on first locking portion 7, through this kind of configuration mode, need not change original structure on the actuator, can realize output locking Assembly and actuator output end part's fastening connection.

In addition, as an embodiment of the present invention, the first locking portion 7 and the second locking portion 8 are connected by a screw. As shown in fig. 5, the output end locking assembly further includes an output end locking screw 10, the first locking portion 7 has a through hole 17, the second locking portion 8 has a threaded hole 18, and the output end locking screw 10 passes through the through hole 17 to be matched with the threaded hole 18. With this arrangement, the first locking portion 7 and the second locking portion 8 are reliably connected.

Further, the first locking portion 7 and the second locking portion 8 each have an inner surface following the outer surface of the output-side member 22. As an embodiment of the present invention, the output end part 22 is an output end nut, the output end locking assembly is fixedly connected to the output end nut, referring to fig. 4, the first locking portion 7 and the second locking portion 8 are both semicircular components, the inner surface of the first locking portion 7 is a semicircle following the outer surface of the output end nut, referring to the upper semicircular locking surface 15 in fig. 8 and 9, the inner surface of the second locking portion 8 is also a semicircle following the outer surface of the output end nut, referring to the lower semicircular locking surface 20 in fig. 10 and 11, the first locking portion 7 and the second locking portion 8 are provided with mounting lugs, the through hole 17 is provided on the mounting lug of the first locking portion 7, the threaded hole 18 is provided on the mounting lug of the second locking portion 8, the first locking portion 7 and the second locking portion 8 are respectively fastened to the nut, the output end locking screw 10 is screwed into the threaded hole 18 through the through hole 17 and tightened, the first locking portion 7 and the second locking portion 8 can be locked to the output end nut. Through the configuration mode, the output end locking assembly can be effectively prevented from moving in the radial direction of the output end nut, and the connection reliability is further improved.

Further, in order to prevent the play and inclination of the output side lock assembly in the axial direction of the output side nut, the first lock portion 7 and the second lock portion 8 are each configured in a housing structure having a groove in which the output side member 22 is disposed. Referring to the embodiment of fig. 5, 8 and 10, the bottom surface of the groove of the first locking portion 7 is an upper semicircular locking surface 15 following the outer surface of the output nut, the two side surfaces of the groove are upper semicircular axial matching surfaces 16, the bottom surface of the groove of the second locking portion 8 is a lower semicircular locking surface 20 following the outer surface of the output nut, and the two side surfaces of the groove are lower semicircular axial matching surfaces 19. In consideration of the practical conditions of processing and assembly, fit clearances exist between the upper semicircular axial fit surface 16 and the lower semicircular axial fit surface 19 and two end faces of the output end nut, the smaller the fit clearance is, the higher the assembly precision is, and the higher the reliability is, and in the invention, the fit clearance is less than or equal to 0.01mm, so that the small-clearance connection is realized. Further, the larger the area of the upper semicircular axial engagement face 16 and the lower semicircular axial engagement face 19 is, the better the effect of preventing the axial runout and the inclination is.

Further, in order to ensure that the first locking portion 7 and the second locking portion 8 can press the output end part 22 and are stressed evenly, a distance H is formed between the first locking portion 7 and the second locking portion 8. As an embodiment of the present invention, please refer to fig. 4, after the first semicircular locking portion 7 and the second semicircular locking portion 8 are fastened to the output end nut, a radial distance H is left between the two semicircular locking portions, by this configuration, a pre-tightening force is generated between the output end locking screw 10 and the threaded hole 18, and the first locking portion 7 and the second locking portion 8 can compress the output end component 22 and balance the stress through the pre-tightening force. The value of the distance H is determined according to actual needs, for example, the value range of the distance H is selected as follows: h is more than or equal to 0.5 and less than or equal to 1. Preferably, the spacing H is 1 mm.

In addition, the length adjusting cylinder 4 is provided with a component which is convenient to rotate, so that the difficulty of rotating the length adjusting cylinder 4 is reduced. As an embodiment of the present invention, the length-adjusting cylinder 4 has a plurality of flat surfaces 11 on the outer wall thereof, and the plurality of flat surfaces 11 are used to cooperate with the tool to rotate the length-adjusting cylinder 4. As shown in fig. 6, a plurality of planes 11 lower than the outer wall surface are embedded on the outer wall of the length adjusting cylinder 4, so that the rotating tool is matched with the planes 11 in a narrow space, the length adjusting cylinder 4 is easily rotated, and the use requirement in a narrow compact space is met. Further, a plurality of planes 11 are symmetrically arranged on the outer wall of the length adjusting cylinder 4, so that the length adjusting cylinder is convenient to be matched with a tool used for rotation.

In addition, in order to improve the overall strength of the mechanical zero lock, the materials of all parts in the mechanical zero lock are high-strength materials, such as precipitation hardening stainless steel 05Cr17Ni4Cu4Nb, the tensile strength of the materials is up to 1300MPa, and the use requirement of high thrust can be met. Through the configuration mode provided by the invention, the mechanical zero position lock can bear the linear thrust of 50 kN.

Referring to fig. 5, the assembly sequence of the mechanical zero position lock of the actuator according to the present invention is as follows: firstly screwing a first left-handed locking nut 2 and a second left-handed locking nut 3 on a first threaded rod 1a on a fixed block 1, then screwing a first right-handed locking nut 5 and a second right-handed locking nut 6 on a second threaded rod 14 on a first locking part 7, then screwing two ends of a length adjusting cylinder 4 on the first threaded rod 1a and the second threaded rod 14 respectively, then installing the fixed block 1 on a shell of an actuator through a fixed block locking screw, then connecting the first locking part 7 with the upper part of an output end part 22 of the actuator, then adjusting the screwing length of the thread of the length adjusting cylinder 4, screwing and fixing the first left-handed locking nut 2, the second left-handed locking nut 3, the first right-handed locking nut 5 and the second right-handed locking nut 6 after adjusting in place, then connecting the second locking part 8 with the lower part of the output end part 22, and fastening the second locking part 8 and the first locking part 7 through an output end locking screw 10, thus completing the installation of the mechanical zero position lock. Before length adjustment is carried out on a mechanical zero-position lock, a first left-handed locking nut 2, a second left-handed locking nut 3, a first right-handed locking nut 5 and a second right-handed locking nut 6 are firstly unscrewed, a length adjusting barrel 4 is rotated to a specified length, then the second left-handed locking nut 3 and the first left-handed locking nut 2 are sequentially screwed, a fixing block 1 and the length adjusting barrel 4 are locked through double nuts, then the first right-handed locking nut 5 and the second right-handed locking nut 6 are sequentially screwed, a first locking part 7 and the length adjusting barrel 4 are locked through double nuts, and therefore high-strength high-rigidity connection and locking of the mechanical zero-position lock are achieved.

The actuator mechanical zero position lock provided by the invention is suitable for outage zero position locking of a linear electromechanical actuator, and mainly has the following characteristics:

(1) the mechanical zero-position lock of the actuator has high connection strength and connection rigidity, is balanced in stress and can meet the requirement of high thrust. Through selection of high-strength materials, fastening and force transmission effects of large-diameter multi-thread fine threads, a butting locking mode of double nuts and a small-gap large-plane matching installation mode between an output end locking assembly and an output end nut of an electromechanical actuator, the mechanical zero-position lock can be effectively locked in a compact space, and has high strength, high rigidity, enough locking force and balanced integral stress. The verification proves that the mechanical zero position lock can bear the linear thrust of 50kN in the whole rocket loading and transporting process of the engine nozzle, and meets the use requirements under the working conditions of low-frequency random vibration and impact in the whole rocket loading and transporting process of the rocket engine nozzle.

(2) The mechanical zero position lock of the actuator has compact structure and can meet the installation requirement in a narrow space. Compare traditional spray tube fixed scheme in the spray tube transportation, the volume and the weight of mechanical zero position lock obviously reduce, and install convenient, convenient to detach, use in the narrow space between engine spray tube and actuator, can not produce the structure and interfere, be the convenient, effective way of solving the whole dress arrow transportation problem of engine spray tube.

(3) The mechanical zero position lock of the actuator has a certain length adjusting function. By utilizing the left-right screwing principle, the linear length of the mechanical zero position lock can be adjusted in a stepless manner within a certain range according to the zero position length requirement of the actuator by rotating the length adjusting cylinder 4.

(4) The mechanical zero position lock of the actuator has wide application range. When the mechanical zero position lock provided by the invention is arranged on a linear electromechanical actuator, the linear electromechanical actuator does not need to be specially improved, the connection and fixing modes of the two ends of the mechanical lock can be flexibly adjusted along with the structure of the actuator, and the zero position locking of the actuators of different models can be realized by utilizing the existing structure of the servo actuator to carry out adaptive improvement.

According to another aspect of the present invention, there is provided an actuator comprising a mechanical zero lock according to the invention as set out above.

By applying the configuration mode, the actuator comprises the mechanical zero position lock, and the mechanical zero position lock can realize high-strength and high-rigidity connection in a compact space on the premise of not specially improving the structure of the existing actuator, has the advantages of simple structure, adjustable length, large locking force and balanced stress, can meet the use requirement of large thrust, and has wide application range. Therefore, the working performance and the application range of the actuator can be greatly improved by applying the mechanical zero position lock to the actuator.

According to a further aspect of the invention there is provided a transportation device comprising an actuator as set out above.

By applying the configuration mode, the transportation device comprises the actuator, and the actuator is provided with the mechanical zero position lock with adjustable length, simple structure and large locking force, so that the transportation device can bear large thrust, cannot generate structural interference and can be suitable for narrow space. Therefore, by applying the actuator to the transportation device, the workability and the applicable range of the transportation device can be significantly improved.

In summary, the present invention provides an actuator mechanical zero position lock, an actuator and a transportation device, the mechanical zero position lock realizes reliable connection with the actuator through a fixed block and an output end locking component, realizes matching of a first section of internal thread and the first threaded rod and matching of a second section of internal thread and a second threaded rod by arranging the first threaded rod on the fixed block, the second threaded rod on the output end locking component and arranging the first section of internal thread and the second section of internal thread on a length adjusting cylinder, realizes adjustment of connection length among the first threaded rod, the second threaded rod and the length adjusting cylinder by fully utilizing a left and right thread screwing principle, realizes axial locking of the length adjusting cylinder by utilizing a first locking nut and a second locking nut, and has the advantages of simple structure, reliable locking, high rigidity and high strength of the whole mechanical zero position lock, can bear high thrust, and can be through the change of length adjustment in order to adapt to actuator zero position length, can realize the reliable adjustable locking to the actuator, simultaneously, this machinery zero position lock overall arrangement is compact, and it is convenient to install, need not to carry out special improvement to servo actuator structure, can not produce the structure and interfere, can adapt to narrow and small space, satisfies servo actuator's zero adjustment full stroke demand. Compared with the prior art, the technical scheme of the invention can solve the technical problems that a mechanical zero position lock in the prior art occupies a large space, has structural interference, cannot meet the requirement of the servo actuator for adjusting the full stroke at the zero position and cannot adjust the length.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.