Multi-stage driving connecting rod type head cone variant mechanism
阅读说明：本技术 一种多级驱动的连杆式头锥变体机构 (Multi-stage driving connecting rod type head cone variant mechanism ) 是由 赵杰亮 吴祥兵 王文中 于 2020-08-04 设计创作，主要内容包括：本发明公开了一种多级驱动的连杆式头锥变体机构,包括一级连杆机构、二级连杆机构、三级连杆机构、弯曲变形机构及锁定装置；所述一级连杆机构、二级连杆机构、三级连杆机构、弯曲变形机构依次连接；所述锁定装置安装于每一级连杆结构上；所述一级连杆机构、二级连杆机构、三级连杆机构用于通过分级液压驱动带动各级连杆机构及其头锥外壳沿轴向运动,完成头锥轴向伸展变形；所述锁定装置用于在各级连杆机构变形到位时,进行位置锁定；所述弯曲变形机构用于驱动各级连杆机构整体运动,完成头锥弯曲变形。本发明可实现轴向多级伸展变形和单侧弯曲变形,同时能够实现头锥变形过程中的运动限位及变体锁定。(The invention discloses a multi-stage driving connecting rod type head cone variant mechanism, which comprises a primary connecting rod mechanism, a secondary connecting rod mechanism, a tertiary connecting rod mechanism, a bending deformation mechanism and a locking device, wherein the primary connecting rod mechanism is connected with the secondary connecting rod mechanism; the first-stage link mechanism, the second-stage link mechanism, the third-stage link mechanism and the bending deformation mechanism are sequentially connected; the locking device is arranged on each stage of connecting rod structure; the first-stage connecting rod mechanism, the second-stage connecting rod mechanism and the third-stage connecting rod mechanism are used for driving each stage of connecting rod mechanism and the nose cone shell thereof to move along the axial direction through graded hydraulic drive so as to complete axial extension deformation of the nose cone; the locking device is used for locking the position when each level of connecting rod mechanism is deformed in place; the bending deformation mechanism is used for driving the connecting rod mechanisms at all stages to integrally move so as to finish the bending deformation of the nose cone. The invention can realize axial multistage extension deformation and unilateral bending deformation, and can realize motion limit and variant locking in the process of nose cone deformation.)
1. A multi-stage driving connecting rod type head cone variant mechanism is characterized by comprising a primary connecting rod mechanism (1), a secondary connecting rod mechanism (2), a tertiary connecting rod mechanism (3), a bending deformation mechanism (4) and a locking device (5); the primary connecting rod mechanism (1), the secondary connecting rod mechanism (2), the tertiary connecting rod mechanism (3) and the bending deformation mechanism (4) are connected in sequence; the locking device (5) is arranged on each stage of connecting rod structure;
the primary connecting rod mechanism (1), the secondary connecting rod mechanism (2) and the tertiary connecting rod mechanism (3) are respectively arranged in the primary nose cone shell (101), the secondary nose cone shell (201) and the tertiary nose cone shell (301) and are respectively connected with the primary nose cone shell (101), the secondary nose cone shell (201) and the tertiary nose cone shell (301); the free end of the primary connecting rod mechanism (1) is connected with a head cone head (102);
the primary connecting rod mechanism (1), the secondary connecting rod mechanism (2) and the tertiary connecting rod mechanism (3) are used for driving each stage of connecting rod mechanism and the head cone shell thereof to move along the axial direction through stage hydraulic drive so as to complete the axial extension deformation of the head cone;
the locking device (5) is used for locking the position when the connecting rod mechanisms at all stages deform in place;
the bending deformation mechanism (4) is used for driving all levels of connecting rod mechanisms to integrally move so as to finish the bending deformation of the nose cone.
2. The multi-stage driving link type nose cone variant mechanism according to claim 1, wherein the primary link mechanism (1), the secondary link mechanism (2), and the tertiary link mechanism (3) each comprise a hydraulic cylinder, a short-axis crank base frame revolute pair, a crank link revolute pair, a long-axis link, a long-axis crank rod, a short-axis link, a telescopic rod, a hydraulic rod, a base frame, a hydraulic cylinder connecting piece, a link shaft seat, and a link shaft;
the short shaft crank base frame rotating pair and the base frame are fixedly connected with the hydraulic cylinder, one end of the long shaft crank rod is connected with the short shaft crank base frame rotating pair, the other end of the long shaft crank rod is connected with the telescopic rod, and the telescopic rod is connected with the corresponding nose cone shell through a hinge;
one end of the long shaft connecting rod is connected with the short shaft crank base frame rotating pair, and the other end of the long shaft connecting rod is connected with a telescopic rod of a next-stage connecting rod structure through the crank connecting rod rotating pair;
the connecting rod shaft is fixedly connected with the base through the connecting rod shaft seat, one ends of the short-shaft crank rod and the short-shaft connecting rod are connected with the connecting rod shaft through bearings, and the short-shaft connecting rod is connected with the short-shaft crank rod of the next-stage connecting rod structure;
the hydraulic cylinder is connected with a hydraulic rod of the next-stage connecting rod structure through a hydraulic cylinder connecting piece;
a hydraulic rod of the primary connecting rod mechanism (1) is connected with a head base frame (109), and the head base frame (109) is connected with a telescopic rod of the primary connecting rod mechanism (1) through a head long shaft connecting rod (103) and a crank connecting rod revolute pair (13); the head base frame (109) is connected with a short shaft crank rod of the primary connecting rod mechanism (1) through a head short shaft connecting rod (106);
a hydraulic rod of the primary connecting rod mechanism (1) is connected with the head conical head (102) through a head telescopic rod (108); and one ends of the short-shaft crank rods of the secondary connecting rod mechanism (2) and the tertiary connecting rod mechanism (3), which are far away from the connecting rod shaft, are connected with the corresponding nose cone shells through hinges.
3. The multi-stage driven link nose cone variant mechanism according to claim 2, characterized in that the locking device (5) comprises a locking block (501), a locking base (502), a driving cylinder (504); the two locking blocks (501) are symmetrical and fixedly arranged on the short-shaft crank rod, the locking base (502) is fixedly connected with the hydraulic cylinder, and the driving cylinder (504) is arranged on one side of the locking base (502) through a cylinder fixing piece (505); be equipped with pinhole (5021) on locking base (502), be equipped with hole groove (5011) on locking piece (501), it is connected with locking pin (503) to drive actuating cylinder (504), pinhole (5021), hole groove (5011), coaxial setting of locking pin (503), it is used for promoting to drive actuating cylinder (504) locking pin (503) pass hole groove (5011) are inserted in pinhole (5021), realize the locking.
4. The multi-stage driving link type nose cone variant mechanism according to claim 3, wherein the bending deformation mechanism (4) comprises a motor (401), a coupling (402), a cylinder shaft connecting piece (403), a stepped shaft (404), a bearing seat (405) and a fixing plate (406);
the motor (401) is connected with a stepped shaft (404) through a coupler (402), the stepped shaft (404) is connected with the bearing seat (405), and the motor (401) and the bearing seat (405) are installed on the fixing plate (406);
the cylinder shaft connecting piece (403) is connected with the stepped shaft (404) and the hydraulic cylinder of the three-level connecting rod mechanism (3) and is used for driving the first-level connecting rod mechanism (1), the second-level connecting rod mechanism (2) and the three-level connecting rod mechanism (3) to integrally move under the driving of the motor (401), so that the bending deformation of the head cone is realized.
5. The multi-stage driving link type nose cone variant mechanism is characterized in that the primary nose cone shell (101), the secondary nose cone shell (201) and the tertiary nose cone shell (301) are nested in a segmented manner, the primary nose cone shell (101) is fixedly connected with two segments, one segment is arranged on a nose cone head (102), and the telescopic link (108) is driven by the primary nose cone shell (101) through the nose cone head (102) to move.
6. The multi-stage driving link type nose cone variant mechanism according to claim 1, wherein the primary link mechanism (1), the secondary link mechanism (2) and the tertiary link mechanism (3) are of a left-right and up-down symmetrical structure.
7. The multi-stage drive link nose cone variant mechanism of claim 1, wherein the cross-section of the link nose cone variant mechanism is elliptical.
8. The multi-stage driving link type nose cone variant mechanism according to claim 1, wherein the primary link mechanism (1), the secondary link mechanism (2) and the tertiary link mechanism (3) are extended in such a manner that the stages are simultaneously extended, sequentially extended in the order of one stage, two stages and three stages or extended in a single stage.
Technical Field
The invention belongs to the technical field of aerospace vehicles, and particularly relates to a multi-stage driving connecting rod type nose cone variant mechanism.
Background
The aerospace craft, as a novel aerospace vehicle comprising aviation and aerospace technologies, needs to experience two different flight environments of an atmosphere and a space, and arises from the operation of a variant aircraft for more efficiently realizing functions of flight, transportation and the like and improving self-adaptability, but the research of most of the present variant aircraft is developed around wings, and the research on variants of a nose cone part is few, and most of the research is in pneumatic configuration design and pneumatic characteristic analysis. The attitude and profile of the nose cone portion also greatly affects its maneuverability, and thus a nose cone variation mechanism is desired.
Disclosure of Invention
The invention aims to provide a multi-stage driving connecting rod type nose cone variant mechanism which can realize axial multi-stage extension deformation and single-side bending deformation, and provides a locking device of a nose cone variant to realize motion limiting and variant locking in the process of nose cone deformation.
The invention provides a multi-stage driving connecting rod type head cone variant mechanism, which comprises a primary connecting rod mechanism, a secondary connecting rod mechanism, a tertiary connecting rod mechanism, a bending deformation mechanism and a locking device, wherein the primary connecting rod mechanism is connected with the secondary connecting rod mechanism; the first-stage link mechanism, the second-stage link mechanism, the third-stage link mechanism and the bending deformation mechanism are sequentially connected; the locking device is arranged on each stage of connecting rod structure;
the primary connecting rod mechanism, the secondary connecting rod mechanism and the tertiary connecting rod mechanism are respectively arranged in the primary nose cone shell, the secondary nose cone shell and the tertiary nose cone shell and are respectively connected with the primary nose cone shell, the secondary nose cone shell and the tertiary nose cone shell; the free end of the primary connecting rod mechanism is connected with the head cone;
the first-stage connecting rod mechanism, the second-stage connecting rod mechanism and the third-stage connecting rod mechanism are used for driving each stage of connecting rod mechanism and the nose cone shell thereof to move along the axial direction through graded hydraulic drive so as to complete axial extension deformation of the nose cone;
the locking device is used for locking the position when each level of connecting rod mechanism is deformed in place;
the bending deformation mechanism is used for driving the connecting rod mechanisms at all stages to integrally move so as to finish the bending deformation of the nose cone.
Furthermore, the primary connecting rod mechanism, the secondary connecting rod mechanism and the tertiary connecting rod mechanism respectively comprise a hydraulic cylinder, a short shaft crank base frame rotating pair, a crank connecting rod rotating pair, a long shaft connecting rod, a long shaft crank rod, a short shaft connecting rod, a telescopic rod, a hydraulic rod, a base frame, a hydraulic cylinder connecting piece, a connecting rod shaft seat and a connecting rod shaft;
the short shaft crank base frame rotating pair and the base frame are fixedly connected with the hydraulic cylinder, one end of the long shaft crank rod is connected with the short shaft crank base frame rotating pair, the other end of the long shaft crank rod is connected with the telescopic rod, and the telescopic rod is connected with the corresponding nose cone shell through a hinge;
one end of the long shaft connecting rod is connected with the short shaft crank base frame rotating pair, and the other end of the long shaft connecting rod is connected with a telescopic rod of a next-stage connecting rod structure through the crank connecting rod rotating pair;
the connecting rod shaft is fixedly connected with the base through the connecting rod shaft seat, one ends of the short-shaft crank rod and the short-shaft connecting rod are connected with the connecting rod shaft through bearings, and the short-shaft connecting rod is connected with the short-shaft crank rod of the next-stage connecting rod structure;
the hydraulic cylinder is connected with a hydraulic rod of the next-stage connecting rod structure through a hydraulic cylinder connecting piece;
the hydraulic rod of the primary connecting rod mechanism is connected with a head base frame, and the head base frame is connected with a telescopic rod of the primary connecting rod mechanism through a head long shaft connecting rod and a crank connecting rod revolute pair; the head base frame is connected with a short shaft crank rod of the primary connecting rod mechanism through a head short shaft connecting rod;
the hydraulic rod of the primary connecting rod mechanism is connected with the head cone head through a head telescopic rod; and one ends of the short shaft crank rods of the secondary connecting rod mechanism and the tertiary connecting rod mechanism, which are far away from the connecting rod shaft, are connected with the corresponding nose cone shells through hinges.
Further, the locking device comprises a locking block, a locking base and a driving cylinder; the two symmetrical locking blocks are fixedly arranged on the short-shaft crank rod, the locking base is fixedly connected with the hydraulic cylinder, and the driving cylinder is arranged on one side of the locking base through a cylinder fixing piece; the locking base is provided with a pin hole, the locking block is provided with a hole groove, the driving cylinder is connected with a locking pin, the pin hole, the hole groove and the locking pin are coaxially arranged, and the driving cylinder is used for pushing the locking pin to penetrate through the hole groove to be inserted into the pin hole, so that locking is achieved.
Further, the bending deformation mechanism comprises a motor, a coupler, a cylinder shaft connecting piece, a stepped shaft, a bearing seat and a fixing plate;
the motor is connected with the stepped shaft through the coupler, the stepped shaft is connected with the bearing seat, and the motor and the bearing seat are arranged on the fixed plate;
the cylinder shaft connecting piece is connected with the stepped shaft and the hydraulic cylinder of the three-level connecting rod mechanism and is used for driving the first-level connecting rod mechanism, the second-level connecting rod mechanism and the three-level connecting rod mechanism to integrally move under the driving of the motor so as to realize the bending deformation of the head cone.
Furthermore, the first-stage nose cone shell, the second-stage nose cone shell and the third-stage nose cone shell are nested in a segmented mode, the first-stage nose cone shell is fixedly connected with two segments, one segment of the first-stage nose cone shell is arranged on the nose cone head, and the first-stage nose cone shell drives the telescopic rod to move through the nose cone head.
Furthermore, the first-level link mechanism, the second-level link mechanism and the third-level link mechanism are in a left-right and up-down symmetrical structure.
Further, the section of the connecting rod type nose cone variant mechanism is oval.
Furthermore, the extension modes of the first-stage link mechanism, the second-stage link mechanism and the third-stage link mechanism are that all stages are extended simultaneously, and the extension modes are sequentially extended according to the sequence of the first stage, the second stage and the third stage or are extended in a single stage.
Compared with the prior art, the invention has the beneficial effects that:
1) the invention comprises a three-stage connecting rod mechanism, wherein each stage of connecting rod mechanism drives a connecting rod and a crank rod through respective moving pairs, and then a telescopic rod connected on the crank rod drives a nose cone elliptic sectional shell to linearly move, so that the axial extension deformation of the nose cone is realized.
2) The invention comprises a head cone bending deformation structure, and a motor drives a three-level connecting rod mechanism at the front end of a head cone to integrally move through a stepped shaft and a connecting piece, so that the head cone bending deformation is realized.
3) The invention comprises a connecting rod mechanism locking device, and realizes motion limiting and variant locking in the process of nose cone deformation.
4) The invention realizes the multi-stage driving mode and the multi-deformation combination of the nose cone variant, has stable and reliable deformation process and is beneficial to the aircraft to obtain the optimal aerodynamic performance.
Drawings
FIG. 1 is a schematic structural diagram of a multi-stage driving connecting rod type nose cone variant mechanism of the present invention;
FIG. 2 is a schematic structural diagram of a one-stage link mechanism of the multi-stage driving link type nose cone variant mechanism of the present invention;
FIG. 3 is a schematic structural diagram of a bending deformation structure of the multi-stage driving connecting rod type nose cone variant mechanism of the invention;
fig. 4 is a schematic structural diagram of the multi-stage driving linkage type nose cone variant mechanism locking device of the invention.
Reference numbers in the figures:
1-a first-level link mechanism; 2-a two-stage linkage mechanism; 3-a three-level link mechanism; 4-bending deformation structure; 5-a locking device;
11-a primary hydraulic cylinder; 21-a two-stage hydraulic cylinder 12-a short shaft crank pedestal revolute pair; 13-crank connecting rod revolute pair; 101-a primary nose cone housing; 201-a secondary nose cone housing; 301-three stage nose cone shell; 102-head cone head;
103-head long axis linkage; 203-long axis linkage; 104-long axis crank rod; 105-primary short axis crank lever; 205-secondary short axis crank lever; 106-head stub shaft link; 206-short axis linkage; 107-head telescopic rod; 108-a telescopic rod; 109-a head pedestal; 1010-hinge; 111-primary hydraulic ram; 211-secondary hydraulic rod; 112-a base frame; 113-hydraulic cylinder attachment; 114-a primary threaded rod; 214-secondary threaded rod; 314-tertiary threaded rod; 121-connecting rod axle seat; 122-link shaft;
401-an electric machine; 402-a coupling; 403-cylinder shaft connection; 404-a stepped shaft; 405-a bearing seat; 406-a fixed plate;
501-locking block; 5011-hole slot; 502-a locking base; 5021-pin hole; 503-locking pin; 504-a drive cylinder; 505-cylinder mount.
Detailed Description
The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that functional, methodological, or structural equivalents or substitutions made by these embodiments are within the scope of the present invention.
Referring to fig. 1 to 4, the present embodiment provides a multi-stage driving connecting rod type nose cone variant mechanism, which includes a first-stage connecting rod mechanism 1, a second-stage connecting rod mechanism 2, a third-stage connecting rod mechanism 3, a bending deformation mechanism 4 and a locking device 5; the first-stage link mechanism 1, the second-stage link mechanism 2, the third-stage link mechanism 3 and the bending deformation mechanism 4 are sequentially connected; the locking device 5 is arranged on each stage of connecting rod structure;
the primary connecting rod mechanism 1, the secondary connecting rod mechanism 2 and the tertiary connecting rod mechanism 3 are respectively arranged in the primary
the primary connecting rod mechanism 1, the secondary connecting rod mechanism 2 and the tertiary connecting rod mechanism 3 are used for driving each stage of connecting rod mechanism and the head cone shell thereof to move along the axial direction through stage hydraulic drive so as to complete axial extension deformation of the head cone;
the locking device 5 is used for locking the position when the link mechanisms at each stage deform to the right position;
the bending deformation mechanism 4 is used for driving all levels of connecting rod mechanisms to integrally move so as to finish the bending deformation of the nose cone.
In this embodiment, each of the first-stage link mechanism 1, the second-stage link mechanism 2, and the third-stage link mechanism 3 includes a hydraulic cylinder, a short-axis crank base frame revolute pair, a crank link revolute pair, a long-axis link, a long-axis crank rod, a short-axis link, a telescopic rod, a hydraulic rod, a base frame, a hydraulic cylinder connecting piece, a link shaft seat, and a link shaft;
the minor axis crank base frame revolute pair and the base frame are fixedly connected with a hydraulic cylinder, one end of a major axis crank rod is connected with the minor axis crank base frame revolute pair, the other end of the major axis crank rod is connected with a telescopic rod, and the telescopic rod is connected with a corresponding nose cone shell through a hinge;
one end of the long shaft connecting rod is connected with the short shaft crank base frame rotating pair, and the other end of the long shaft connecting rod is connected with the telescopic rod of the next-stage connecting rod structure through the crank connecting rod rotating pair;
the connecting rod shaft is fixedly connected with the base through the connecting rod shaft seat, the short shaft crank rod and one end of the short shaft connecting rod are connected with the connecting rod shaft through a bearing, and the short shaft connecting rod is connected with the short shaft crank rod of the next-stage connecting rod structure;
the hydraulic cylinder is connected with a hydraulic rod of the next-stage connecting rod structure through a hydraulic cylinder connecting piece;
a hydraulic rod of the primary link mechanism 1 is connected with a head base frame 109, and the head base frame 109 is connected with a telescopic rod of the primary link mechanism 1 through a head long shaft connecting rod 103 and a crank connecting rod revolute pair 13; the head pedestal 109 is connected with a short shaft crank rod of the primary link mechanism 1 through a head short shaft connecting rod 106;
the hydraulic rod of the primary link mechanism 1 is connected with the head conical head 102 through a head telescopic rod 108; one end of the short shaft crank rod of the second-level link mechanism 2 and the third-level link mechanism 3, which is far away from the link shaft, is connected with the corresponding nose cone shell through a hinge.
In the present embodiment, the lock device 5 includes a lock block 501, a lock base 502, a drive cylinder 504; the two symmetrical locking blocks 501 are fixedly arranged on the short-shaft crank rod, the locking base 502 is fixedly connected with the hydraulic cylinder, and the driving cylinder 504 is arranged on one side of the locking base 502 through the cylinder fixing piece 505; a pin hole 502 is arranged on the locking base 502), a hole slot 5011 is arranged on the locking block 501, a locking pin 503 is connected to the driving cylinder 504, the pin hole 5021, the hole slot 5011 and the locking pin 503 are coaxially arranged, and the driving cylinder 504 is used for pushing the locking pin 503 to penetrate through the hole slot 5011 and be inserted into the pin hole 5021 to achieve locking.
In the present embodiment, the bending deformation mechanism 4 includes a motor 401, a coupling 402, a cylinder shaft connecting member 403, a stepped shaft 404, a bearing block 405, and a fixing plate 406;
the motor 401 is connected with a stepped shaft 404 through a coupler 402, the stepped shaft 404 is connected with a bearing seat 405, and the motor 401 and the bearing seat 405 are installed on a fixing plate 406;
the cylinder shaft connecting piece 403 is connected with the stepped shaft 404 and the hydraulic cylinder of the three-level link mechanism 3, and is used for driving the first-level link mechanism 1, the second-level link mechanism 2 and the third-level link mechanism 3 to integrally move under the driving of the motor 401, so that the bending deformation of the nose cone is realized.
In this embodiment, the first-stage
In this embodiment, the primary link mechanism 1, the secondary link mechanism 2, and the tertiary link mechanism 3 are symmetrical in the left-right and up-down directions.
In the present embodiment, the cross section of the connecting rod type nose cone variant mechanism is an ellipse.
In this embodiment, the first-stage link mechanism 1, the second-stage link mechanism 2, and the third-stage link mechanism 3 may be extended in a manner that the first-stage link mechanism, the second-stage link mechanism, and the third-stage link mechanism extend simultaneously at different stages, sequentially extend at the first stage, the second stage, and the third stage, or extend at a single stage.
The multi-stage driving connecting rod type head cone variant mechanism provided by the embodiment has the advantages that the main body of the mechanism is a three-stage connecting rod mechanism, each stage of connecting rod mechanism is driven by a moving pair (hydraulic cylinder), and the maximum axial expansion amount of more than 1400mm can be realized. The motor driving shaft system drives the front-end three-stage link mechanism to integrally move at the tail part of the nose cone, so that the bending deformation of the nose cone is realized, and the stretching and bending proportion can reach 3.5. After the head cone axially stretches and deforms in place, the locking devices on the link mechanisms at all levels start to work, and variant locking under high load of the head cone is realized. The nose cone mechanism is divided into three stages and is driven independently, the stages can be deformed uniformly or non-uniformly, and can be deformed in a single stage, various pneumatic appearance choices are provided, and the nose cone mechanism is favorable for adapting to a complex aerospace environment.
Multistage driven connecting rod formula head awl variant mechanism, by tertiary link mechanism (axial extension mechanism), bending deformation structure and locking device constitute, each grade of link mechanism main part can be regarded as a slider-crank mechanism, the crank rod of each grade is installed on last one-level moving pair, the connecting rod is installed on this grade of moving pair, the moving pair of each grade of mechanism links to each other in proper order, higher level's moving pair motion drives subordinate moving pair motion, moving pair's motion drives connecting rod motion at each grade simultaneously and realizes that the head awl extends the deformation, one section telescopic link is being connected to the crank rod, the telescopic link passes through the hinge and is connected its motion of drive with oval segmental shell, one-level head awl shell links firmly for two, another section connector conical head, the head conical head passes through the telescopic link with the head base and links to.
The motor transmits power to the stepped shaft through the coupler, the connecting piece arranged on the moving pair of the three-stage connecting rod mechanism is connected with the stepped shaft through the key, and the stepped shaft rotates to drive the whole front-end connecting rod mechanism to bend and deform. The short shaft crank rods of each stage of connecting rod mechanism are provided with locking blocks, when the nose cone extends and deforms in place, the air cylinders fixed on the base push the locking pins to be inserted into the hole grooves in the locking blocks and the pin holes in the base, and the mechanism is locked by limiting the rotation of the cranks at the position.
The present invention is described in further detail below.
As shown in fig. 1, the multi-stage driving link type nose cone variant mechanism mainly comprises a first-stage link mechanism 1, a second-stage link mechanism 2, a third-stage link mechanism 3, a bending deformation mechanism 4 and a locking device 5. The various stages of linkage arrangements are assembled and operate in a similar manner and only one stage of linkage arrangement 1 will be described in detail herein.
As shown in fig. 2, the primary link mechanism 1 mainly includes a primary hydraulic cylinder 11, a primary hydraulic rod 111, a long axis crank rod 104, a primary short axis crank rod 105, a head long axis link 103, a head short axis link 106, and a head telescopic link 107. The primary connecting rod mechanism 1, the secondary connecting rod mechanism 2 and the tertiary connecting rod mechanism 3 are respectively connected with a primary
Each stage of the link mechanism body can be regarded as a crank slide block mechanism, wherein, the assembly relation of the crank base frame revolute pair 12 is as follows: the first-stage long-axis crank lever 104, the first-stage short-axis crank lever 105, the next-stage long-axis link 203, and the short-axis link 206 are mounted at one end on the link shaft 122 through bearings, and are fixed to the base frame 112 mounted on the first-stage hydraulic cylinder 11 together with the link shaft base 121. The crank connecting rod revolute pair 12 is assembled by a plug screw, a bearing and a positioning nut. The long axis crank rod 104 and the first-stage short axis crank rod 105 are connected with the elliptical first-stage
In order to ensure that the head cone head 102 moves towards the driving direction relative to the first-stage
As shown in fig. 3, the motion and power of the motor 401 are transmitted to the stepped shaft 404 through the coupling 402, the other end of the stepped shaft 404 is mounted on the bearing block 405, the middle section of the stepped shaft is connected with the cylinder shaft connecting piece 403 through a key, and the cylinder shaft connecting piece 403 drives each stage of link mechanism at the front end to move integrally through the four three-stage threaded rods 314, so that the head cone bending deformation is realized.
As shown in fig. 4, each stage of link mechanism is provided with a locking device 5, which is composed of a locking block 501, a locking pin 503, a driving cylinder 504, a locking base 502 and a cylinder fixing member 505, wherein the locking block 501 is two symmetrical blocks which are installed and fixed on the second stage short shaft crank rod 205 through bolts and nuts, the locking base 502 is installed on the second stage hydraulic cylinder 21 through two second stage threaded rods 214, two protruding pin holes 5021 are arranged on the locking block 501 for limiting the movement of the locking pin 503, and the driving cylinder 504 is fixed on the cylinder fixing member 505 and installed on one side of the locking base 502. Before locking starts, the driving cylinder 504 is inflated to work in the shortest stroke, after the secondary link mechanism 2 deforms in place, the pin hole 5021 in the locking base 502, the hole slot 5011 in the locking block 501 and the driving cylinder 504 are concentric in shaft, at the moment, the electromagnetic valve is reversed, the driving cylinder 504 reaches the farthest stroke, and the locking pin 503 penetrates through the hole slot 5011 and is inserted into the pin hole 5021 to achieve locking.
The extension deformation of the nose cone is driven by hydraulic pressure in stages, when the nose cone is deformed, all stages of link mechanisms can be unfolded simultaneously, also can be unfolded sequentially according to the sequence of first stage, second stage and third stage or can be deformed in a single stage according to requirements, and after the extension deformation is in place, the locking devices 5 arranged on all stages of link mechanisms work to complete locking. The head cone bending deformation mechanism 4 is driven by a motor, and the deformation process is independent of the connecting rod mechanisms and the locking devices 5 at all levels.
The multi-stage driving connecting rod type head cone variant mechanism has the following technical effects:
1) the invention comprises a three-stage connecting rod mechanism, wherein each stage of connecting rod mechanism drives a connecting rod and a crank rod through respective moving pairs, and then a telescopic rod connected on the crank rod drives a nose cone elliptic sectional shell to linearly move, so that the axial extension deformation of the nose cone is realized.
2) The invention comprises a head cone bending deformation structure, and a motor drives a three-level connecting rod mechanism at the front end of a head cone to integrally move through a stepped shaft and a connecting piece, so that the head cone bending deformation is realized.
3) The invention comprises a connecting rod mechanism locking device, and realizes motion limiting and variant locking in the process of nose cone deformation.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
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