A locking mechanism with a dead point position

Abstract

The present invention discloses a locking mechanism with a dead point position, which belongs to the technical field of locking parts in antennas; it comprises a frame, an actuator, a crank rod, a crank locking hook and a connecting rod; the frame comprises a fixing seat and two splints; one end of each splint is arranged on the fixing seat, and the two splints are arranged in parallel; the bent end of the splint is hinged to the top end of the proximal lower branch of the crank locking hook; the left end of the splint is hinged to the proximal end of the crank rod, and the distal end of the crank rod is connected to the end of the proximal lower branch of the crank locking hook through a connecting rod; the actuator comprises an electric cylinder and a motor, and the outer wall of the electric cylinder is fixedly connected to the outer wall of the motor, and the motor drives the electric cylinder to extend and retract; the cylinder bottom of the electric cylinder is hinged to the extended end of the crank rod, and the action end of the electric cylinder is hinged to the proximal upper branch of the crank locking hook; the present invention has the characteristics of compact structure, high dynamic reliability, and zero gap between the locking part and the locked part.

Description

Technical Field

[0001] The present invention relates to the technical field of locking parts in antennas, and in particular to a locking mechanism for an antenna with a compact structure, zero gap with a locked part, and high reliability. Background Art

[0002] Compared to ground-based antennas, vehicle-mounted antennas offer advantages such as flexible transport, high battlefield survivability, and the absence of a base. However, large-diameter vehicle-mounted, automatically deployable antennas face challenges in reliably locking the system during transport and reliably locking the antenna's main surface in sections due to its large diameter. Currently, manual bolt locking is commonly used for transport, while electromagnets or automatic latches are commonly used to lock the main surface. These locking methods fail to achieve the requirements of automation, high dynamic reliability, and zero clearance between the locking and locked components. Summary of the Invention

[0003] In view of this, the present invention provides a novel locking mechanism having the characteristics of compact structure, high dynamic reliability, and zero clearance between the locking member and the locked member.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A locking mechanism with a dead point position, comprising a frame 1, an actuator 4, a crank rod 2, a crank locking hook 3 and a connecting rod 5;

[0006] The frame includes a fixed seat and two clamping plates; one end of each clamping plate is arranged on the fixed seat, and the two clamping plates are arranged in parallel; the bent end of the clamping plate is hinged to the top of the proximal lower branch of the crank locking hook;

[0007] The left end of the splint is hinged to the proximal end of the crank rod, and the distal end of the crank rod is connected to the proximal lower branch end of the crank locking hook through a connecting rod 5;

[0008] The actuator 4 includes an electric cylinder 6 and a motor 7, and the outer wall of the electric cylinder is fixedly connected to the outer wall of the motor, and the motor drives the electric cylinder to extend and retract; the cylinder bottom of the electric cylinder is hinged to the extended end of the crank rod, and the actuating end of the electric cylinder is hinged to the proximal upper branch of the crank locking hook;

[0009] In the locked state, the crank rod and the connecting rod are in a straight line.

[0010] Furthermore, one end of the connecting rod is hinged to the distal end of the crank rod, and the other end of the connecting rod is hinged to the distal end of the proximal lower branch of the crank locking hook.

[0011] Furthermore, each splint is perpendicular to the fixing seat, and the two splints are inclined toward the same side of the fixing seat; the other end of the splint is a bent end, and the bending angle of the bent end is 90° to 120°.

[0012] Furthermore, the crank locking hook includes a distal hook portion, a proximal upper branch portion and a proximal lower branch portion; the proximal upper branch portion and the proximal lower branch portion are V-shaped structures, and the distal hook portion and the proximal upper branch portion are located on the same straight line.

[0013] Furthermore, the proximal end and the distal end of the crank rod are located in the same plane, and an extension end is provided on the proximal end, and the extension end forms an angle of 100° to 130° with the plane.

[0014] Furthermore, a top block is provided on the top of the crank locking hook, and a baffle is provided between the two clamping plates; in the unlocked state, the electric cylinder is in a compressed state, the distal hook portion of the crank locking hook remains in an upwardly lifted state, and the top block and the baffle are close to each other.

[0015] Furthermore, the proximal upper branch of the crank locking hook is located between the two splints, and the proximal lower branch part hinged to the connecting rod is a protrusion, and the outer edge of the protrusion is adapted to the bent end of the splint; during the unlocking or locking process, the outer edge of the protrusion rotates around the bent end.

[0016] Due to the adoption of the above technical solution, the technical advancements achieved by the present invention are:

[0017] The present invention proposes an actuator with a compact structure, high dynamic reliability, zero gap between the locking part and the locked part, and self-locking ability after the mechanism is locked. By rationally utilizing the "dead point" self-locking design method of the four-bar linkage mechanism, the antenna main surface can be stored and unfolded, and the entire antenna can be reliably locked after being stored. The locking mechanism is self-locking, and the load itself cannot cause the locking to fail. When the antenna main surface rotates at high speed and with large dynamics, or when the antenna is loaded and transported, gapless and reliable locking can be guaranteed, greatly improving the reliability and maneuverability of the system. This design method can provide a reference for the design of locking mechanisms and can be used in, but not limited to, the antenna field. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the structure in the locked state according to an embodiment of the present invention.

[0019] Figure 2 Schematic diagram of the structure of the embodiment of the present invention in the unlocked state.

[0020] Figure 3 Schematic diagram of the electric cylinder used in the embodiment of the invention.

[0021] Figure 4 It is a cross-sectional view of the overall structure of an embodiment of the invention.

[0022] Figure 5 It is a front view of the overall structure of the embodiment of the invention in the locked state.

[0023] Figure 6 It is a schematic structural diagram of a crank locking hook according to an embodiment of the invention.

[0024] Figure 7 It is a schematic diagram of the crank rod structure of an embodiment of the invention.

[0025] Figure 8 This is a schematic diagram of a locking hook according to an embodiment of the invention.

[0026] In the figure: 1. Frame, 2. Crank rod, 3. Crank locking hook, 4. Actuator, 5. Connecting rod, 6. Electric cylinder, 7. Motor, 8. Hard mechanical limit for unlocking, 9. Mechanical limit for locking, 10. Hard limit structure on the crank locking hook, 11. Hinge point on the crank locking hook connected to the electric cylinder, 12. Hinge point on the crank locking hook connected to the connecting rod, 13. Hinge point on the crank locking hook connected to the frame, 14. Hinge point on the crank rod connected to the electric cylinder, 15. Hinge point on the crank rod connected to the connecting rod, 16. Hinge point on the crank rod connected to the frame, 17. Pin on the locking hook, 18. Locking hook component. DETAILED DESCRIPTION

[0027] A locking mechanism with a dead point position, comprising a frame 1, an actuator 4, a crank rod 2, a crank locking hook 3 and a connecting rod 5;

[0028] The frame includes a fixed seat and two clamping plates; one end of each clamping plate is arranged on the fixed seat, and the two clamping plates are arranged in parallel; the bent end of the clamping plate is hinged to the top of the proximal lower branch of the crank locking hook;

[0029] The left end of the splint is hinged to the proximal end of the crank rod, and the distal end of the crank rod is connected to the proximal lower branch end of the crank locking hook through a connecting rod 5;

[0030] The actuator 4 includes an electric cylinder 6 and a motor 7, and the outer wall of the electric cylinder is fixedly connected to the outer wall of the motor, and the motor drives the electric cylinder to extend and retract; the cylinder bottom of the electric cylinder is hinged to the extended end of the crank rod, and the actuating end of the electric cylinder is hinged to the proximal upper branch of the crank locking hook;

[0031] In the locked state, the crank rod and the connecting rod are in a straight line.

[0032] Furthermore, one end of the connecting rod is hinged to the distal end of the crank rod, and the other end of the connecting rod is hinged to the distal end of the proximal lower branch of the crank locking hook.

[0033] Furthermore, each splint is perpendicular to the fixing seat, and the two splints are inclined toward the same side of the fixing seat; the other end of the splint is a bent end, and the bending angle of the bent end is 90° to 120°.

[0034] Furthermore, the crank locking hook includes a distal hook portion, a proximal upper branch portion and a proximal lower branch portion; the proximal upper branch portion and the proximal lower branch portion are V-shaped structures, and the distal hook portion and the proximal upper branch portion are located on the same straight line.

[0035] Furthermore, the proximal end and the distal end of the crank rod are located in the same plane, and an extension end is provided on the proximal end, and the extension end forms an angle of 100° to 130° with the plane.

[0036] Furthermore, a top block is provided on the top of the crank locking hook, and a baffle is provided between the two clamping plates; in the unlocked state, the electric cylinder is in a compressed state, the distal hook portion of the crank locking hook remains in an upwardly lifted state, and the top block and the baffle are close to each other.

[0037] Furthermore, the proximal upper branch of the crank locking hook is located between the two splints, and the proximal lower branch part hinged to the connecting rod is a protrusion, and the outer edge of the protrusion is adapted to the bent end of the splint; during the unlocking or locking process, the outer edge of the protrusion rotates around the bent end.

[0038] Further explanation below:

[0039] Reference Figures 1 to 8 This embodiment includes a frame fixed to a base, a crank rod connected to the frame, a crank locking hook connected to the frame, a connecting rod connected to the crank rod and the crank locking hook, and an electric cylinder connecting the crank rod and the crank locking hook.

[0040] Among them, there are two hinge points on the frame, which are connected to the crank locking hook and the crank connecting rod respectively;

[0041] There are three hinge points on the crank rod, which are connected to the frame, electric cylinder and connecting rod respectively;

[0042] There are three hinge points on the crank locking hook, namely the frame, electric cylinder and connecting rod.

[0043] The extension and contraction of the electric cylinder is controlled by the motor to achieve locking and unlocking of the locking hook.

[0044] Through the four-link node arrangement and rod length adjustment, when the locking hook is locked, the crank rod and connecting rod are aligned, and the four-link is in a "dead point" position. When the crank locking hook is subjected to external forces, the four-link remains stable and does not change position. To unlock the locking mechanism, the electric cylinder pushes the crank rod out of the "dead point" position, unlocking the locking mechanism.

[0045] The four-bar linkage relies on the extension and contraction of the electric cylinder to achieve locking and unlocking. The stopping conditions of the electric cylinder can be an inductive photoelectric proximity switch, touching a contact-type travel switch, or touching a structural hard mechanical limit.

[0046] The crank rod and the crank locking hook in the four-bar linkage are not limited to the crank structure in the four-bar linkage, and may also be a rocker structure in the four-bar linkage.

[0047] The change of the position of the four-bar linkage can be driven by structures such as electric cylinders, electric push rods, rotary reducer gear racks, etc.

[0048] The hinge shaft can be a simple shaft-hole fit, or rolling or sliding bearings can be used to support both ends of the shaft.

[0049] The inside and outside positions of the four-link structure and the electric cylinder are replaced, and the fixing surface and fixing method of the frame are replaced.

Claims

1. A locking mechanism with a dead point position, characterized in that: It includes a frame (1), an actuator (4), a crank rod (2), a crank locking hook (3) and a connecting rod (5); The frame includes a fixed seat and two clamping plates; one end of each clamping plate is arranged on the fixed seat, and the two clamping plates are arranged in parallel; the other bent end of the clamping plate is hinged to the top of the proximal lower branch of the crank locking hook; The left end of the splint is hinged to the proximal end of the crank rod, and the distal end of the crank rod is connected to the proximal lower branch end of the crank locking hook through a connecting rod (5); The actuator (4) includes an electric cylinder (6) and a motor (7), wherein the outer wall of the electric cylinder and the outer wall of the motor are fixedly connected, and the motor drives the electric cylinder to extend and retract; the cylinder bottom of the electric cylinder is hinged to the extended end of the crank rod, and the action end of the electric cylinder is hinged to the proximal upper branch of the crank locking hook; In the locked state, the crank rod and the connecting rod are in a straight line; One end of the connecting rod is hinged to the distal end of the crank rod, and the other end of the connecting rod is hinged to the distal end of the proximal lower branch of the crank locking hook; The crank locking hook includes a distal hook portion, a proximal upper branch and a proximal lower branch; the proximal upper branch and the proximal lower branch are V-shaped structures, and the distal hook portion and the proximal upper branch are located on the same straight line.

2. A locking mechanism with a dead point position according to claim 1, characterized in that: Each splint is perpendicular to the fixing seat, and the two splints are inclined toward the same side of the fixing seat; the other end of the splint is a bent end, and the bending angle of the bent end is 90°~120°.

3. The locking mechanism with a dead point position according to claim 1, characterized in that: The proximal end and the distal end of the crank rod are located in the same plane. An extension end is provided on the proximal end, and the extension end forms an angle of 100° to 130° with the plane.

4. The locking mechanism with a dead point position according to claim 1, characterized in that: A top block is provided on the top of the crank locking hook, and a baffle is arranged between the two clamping plates; in the unlocked state, the electric cylinder is in a compressed state, the distal hook portion of the crank locking hook remains in an upwardly lifted state, and the top block and the baffle are close to each other.

5. The locking mechanism with a dead point position according to claim 1, characterized in that: The proximal upper branch of the crank locking hook is located between the two splints, and the proximal lower branch part hinged to the connecting rod is a protrusion, and the outer edge of the protrusion is adapted to the bent end of the splint; during the unlocking or locking process, the outer edge of the protrusion rotates around the bent end.

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