Energy storage actuation system and control method

Abstract

The invention discloses an energy storage actuation system and a control method, and the energy storage actuation system comprises an energy storage actuator and a control system; the energy storage actuator comprises an outer cylinder, a piston assembly, a driving mechanism, a locking mechanism and an unlocking mechanism. The outer cylinder is of a cylinder structure with one closed end. The piston assembly comprises a piston piece arranged in an outer barrel and a piston rod outer barrel, and the outer barrel is of a barrel structure with one closed end. The driving structure is used for driving the piston assembly to move towards the retraction end, and the locking mechanism and the unlocking mechanism are used for locking and unlocking the piston assembly. The closed air chamber is constructed through the outer cylinder and the piston assembly, the motor drives the piston to move towards the retraction end and compresses air in the air chamber at the same time, and when the piston needs to move towards the stretching end, the compressed air in the air chamber can release energy instantly, so that the piston stretches out rapidly.

Description

Technical Field

[0001] The present invention belongs to the technical field of actuating devices, and in particular relates to an energy storage actuating system and a control method. Background Art

[0002] The actuator is a linear motion actuator, an energy conversion device used to realize linear reciprocating motion of the working mechanism or swinging motion less than 360 degrees. Conventional electric actuators are not suitable for applications that require the actuator to be extended quickly because the circuit is difficult to withstand high instantaneous power and cannot be extended quickly with load. For example, the actuator of a drag parachute requires very high instantaneous power due to its characteristics of rapid release, which is a great test for the design of its peripherals such as control circuits and power supply circuits. Summary of the invention

[0003] The object of the present invention is to provide an energy storage actuation system and a control method to solve the problem that the existing electric actuator cannot be extended quickly with load.

[0004] The present invention is achieved through the following technical solutions:

[0005] An energy storage actuation system comprises an energy storage actuator and a control system;

[0006] The accumulator actuator includes:

[0007] The outer cylinder is a cylinder structure with one end closed;

[0008] The piston assembly includes a piston member and a piston rod disposed in an outer tube, the piston member includes a piston matched with the outer tube and a push rod connected with the piston, the piston rod is slidably disposed in the outer tube, one end of the push rod extends into the piston rod and abuts against the piston rod;

[0009] The driving mechanism includes a first motor, a first screw rod and a first nut; the first screw rod is sleeved outside the top rod; one end of the first screw rod is threadedly connected to the first nut, and the rotation of the first screw rod drives the first nut to perform linear motion along the axial direction of the first screw rod; the first motor drives the first screw rod to rotate;

[0010] The locking mechanism comprises a second screw rod, a second nut, a bushing, a locking piece, and a spring; the two ends of the spring are respectively connected to the piston rod and the bushing; a through hole matching with the locking piece is provided on the piston rod, a groove matching with the locking piece is provided on the inner surface of the outer cylinder, the locking piece is provided in the through hole, and the locking piece can move along the radial direction of the piston rod; the bushing is sleeved on the first screw rod, and a locking part and an unlocking part are provided on the bushing, the locking part is used to press the locking piece into the groove, and the unlocking part can provide the locking piece with space to move in a direction away from the groove and enable the locking piece to escape from the groove;

[0011] The unlocking mechanism includes a second motor, a second screw rod and a second nut; the second screw rod is sleeved outside the first screw rod and fixedly connected to the outer cylinder; the second nut is threadedly connected to the second screw rod; one end of the second nut abuts against the unlocking bushing; the second motor drives the second nut to rotate and move along the axial direction of the second screw rod;

[0012] A control system is used to control the first motor and the second motor to control the unlocking mechanism to unlock the piston assembly and the locking mechanism to lock the piston assembly.

[0013] In some embodiments, the first motor and the first lead screw cooperate with each other through gears.

[0014] In some embodiments, the second motor and the second nut cooperate with each other through gears.

[0015] In some embodiments, a D-shaped shaft hole matching structure is formed between the first nut and the piston rod.

[0016] In some embodiments, a D-shaped shaft hole matching structure is formed between the piston rod and the outer tube.

[0017] In some embodiments, the locking member is a steel ball.

[0018] A control method for an energy storage actuation system, including unlocking control and locking control of a piston assembly;

[0019] Unlock controls include:

[0020] Control the second motor to rotate forward, drive the second nut to move toward the bushing, release the locking mechanism from the piston assembly, and extend the piston assembly;

[0021] Controlling the second motor to reverse and drive the second nut back to its initial position;

[0022] Locking controls include:

[0023] Controlling the first motor to rotate forward, driving the first nut and the piston assembly to move toward the closed end of the outer tube until the locking mechanism locks the piston assembly;

[0024] The first motor is controlled to rotate in reverse to drive the first nut back to its initial position.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The present invention compresses the gas in the gas chamber while driving the piston to move toward the retracting end through a motor. When the piston needs to move toward the extending end, the compressed gas in the gas chamber can release energy instantly, so that the piston extends quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 It is a cross-sectional view of the structure of the energy storage actuator according to an embodiment of the present invention.

[0029] in:

[0030] 1-outer cylinder, 2-piston, 3-first screw rod, 4-second screw rod, 5-second nut, 6-bushing, 7-locking piece, 8-spring, 9-piston rod, 10-first nut, 11-second motor, 12-first motor, 13-air chamber, 14-thrust rod. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0032] Example 1

[0033] The core idea of ​​the present invention is to use the electric energy of the motor to drive the piston of the actuator to move toward the retracted end, compress the gas in the air chamber and convert it into air energy. The air energy can be released instantly to drive the piston to extend quickly.

[0034] like Figure 1 As shown, this embodiment is an energy storage actuation system, including an energy storage actuator and a control system;

[0035] The energy storage actuator comprises: an outer tube 1, a piston assembly, a driving mechanism, a locking mechanism and an unlocking mechanism.

[0036] The outer cylinder 1 is a cylinder structure with one end closed.

[0037] The piston assembly includes a piston member and a piston rod 9 arranged in an outer tube 1. The piston member includes a piston 2 matched with the outer tube 1 and a push rod 14 connected to the piston 2. The piston rod 9 is slidably arranged in the outer tube 1. One end of the push rod 14 extends into the piston rod 9 and abuts against the piston rod 9.

[0038] The driving mechanism includes a first motor 12, a first screw rod 3 and a first nut 10; the first screw rod 3 is sleeved on the outside of the top rod 14; one end of the first screw rod 3 is threadedly connected to the first nut 10, and the rotation of the first screw rod 3 drives the first nut 10 to make a linear motion along the axial direction of the first screw rod 3; the first motor 12 drives the first screw rod 3 to rotate.

[0039] In this embodiment, the first motor 12 and the first screw rod 3 cooperate with each other through gears.

[0040] In this embodiment, a D-shaped shaft hole matching structure is formed between the first nut 10 and the piston rod 9. With this structure, the rotation of the first nut 10 can be limited.

[0041] The locking mechanism includes a second screw rod 4, a second nut 5, a bushing 6, a locking piece 7, and a spring 8; the two ends of the spring 8 are respectively connected to the piston rod 9 and the bushing 6; a through hole is provided on the piston rod 9 to cooperate with the locking piece 7, and a groove is provided on the inner surface of the outer cylinder 1 to cooperate with the locking piece 7, the locking piece 7 is arranged in the through hole, and the locking piece 7 can move along the radial direction of the piston rod 9; the bushing 6 is sleeved on the first screw rod 3, and a locking part and an unlocking part are provided on the bushing 6, the locking part is used to press the locking piece 7 into the groove, and the unlocking part can provide the locking piece 7 with space to move in a direction away from the groove and enable the locking piece 7 to escape from the groove.

[0042] In this embodiment, a D-shaped shaft hole matching structure is formed between the piston rod 9 and the outer tube 1. With this structure, the rotation of the piston rod 9 can be restricted so that the locking member 7 and the groove can be aligned without displacement.

[0043] In this embodiment, the locking member 7 is a steel ball.

[0044] The unlocking mechanism includes a second motor 11, a second screw rod 4 and a second nut 5; the second screw rod 4 is sleeved outside the first screw rod 3 and fixedly connected to the outer tube 1; the second nut 5 is threadedly connected to the second screw rod 4; one end of the second nut 5 abuts against the unlocking bushing 6; the second motor 11 drives the second nut 5 to rotate and move axially along the second screw rod 4.

[0045] In this embodiment, the second motor 11 and the second nut 5 cooperate with each other through gears.

[0046] The control system is used to control the first motor 12 and the second motor 11 to control the unlocking mechanism to unlock the piston assembly and the locking mechanism to lock the piston assembly.

[0047] The working phase of the energy storage actuator of this embodiment can be divided into an extension phase and a retraction phase.

[0048] Extension phase:

[0049] At this stage, the control system unlocks the piston assembly.

[0050] The initial state is the locked state, and the locking part of the bushing 6 locks the steel ball in the groove on the outer cylinder 1. The second motor 11 is controlled to rotate forward, and the second motor 11 drives the second nut 5 to rotate and move toward the bushing 6 through the gear, and the second nut 5 drives the bushing 6 to move toward the extended end, so that the locking part of the bushing 6 leaves the steel ball, and the unlocking part is opposite to the steel ball. The unlocking part provides space for the steel ball to slide out of the groove, and the steel ball slides out of the groove to release the lock.

[0051] After the lock is released, the compressed gas in the air chamber 13 is released instantly, driving the piston assembly to extend rapidly toward the extension end.

[0052] The second motor 11 is controlled to reverse, and the second motor 11 drives the second nut 5 to rotate and move toward the retracted end through the gear, so that the second nut 5 is reset.

[0053] Retraction phase:

[0054] At this stage, the control system locks the piston assembly.

[0055] The first motor 12 is controlled to rotate forward. The first motor 12 drives the first screw 3 to rotate through the gear. Since the first nut 10 is restricted in rotation by the piston rod 9, the first nut 10 moves toward the retraction end. After the first nut 10 moves to the protrusion set on the inner side of the piston rod 9, it drives the piston rod 9 to move toward the retraction end. The piston rod 9 drives the push rod 14 and the piston 2 to move toward the retraction end, compressing the gas in the air chamber 13.

[0056] When the piston rod 9 moves to Figure 1 In the locking position shown, the steel ball falls into the groove in the outer tube 1, and the bushing 6 is driven to move toward the retracted end by the force of the compressed spring 8, so that the locking portion of the bushing 6 contacts the steel ball, which prevents the steel ball from sliding out of the groove, thereby completing the locking.

[0057] The first motor 12 is controlled to reverse, and the first motor 12 drives the first screw rod 3 to rotate through the gear, and the first screw rod 3 drives the first nut 10 to move toward the extended end, so that the first nut 10 returns to the initial position, leaving movement space for the extension of the piston rod 9.

[0058] Example 2

[0059] This embodiment is a control method for an energy storage actuation system, including unlocking control and locking control of a piston assembly;

[0060] Unlock controls include:

[0061] The second motor 11 is controlled to rotate forward, driving the second nut 5 to move toward the bushing 6, releasing the locking mechanism from the piston assembly, and allowing the piston assembly to extend;

[0062] Control the second motor 11 to reverse and drive the second nut 5 back to its initial position;

[0063] Locking controls include:

[0064] Control the first motor 12 to rotate forward, drive the first nut 10 and the piston assembly to move toward the closed end of the outer tube 1, until the locking mechanism locks the piston assembly;

[0065] The first motor 12 is controlled to rotate in reverse to drive the first nut 10 back to its initial position.

[0066] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. An energy storage actuation system, characterized in that: Including energy storage actuator and control system; The energy storage actuator comprises: An outer cylinder (1), wherein the outer cylinder (1) is a cylinder structure with one end closed; A piston assembly, the piston assembly comprising a piston member and a piston rod (9) arranged in the outer cylinder (1), the piston member comprising a piston (2) matched with the outer cylinder (1) and a push rod (14) connected to the piston (2), the piston rod (9) being slidably matched in the outer cylinder (1), one end of the push rod (14) extending into the piston rod (9) and abutting against the piston rod (9); A driving mechanism, the driving mechanism comprising a first motor (12), a first screw rod (3) and a first nut (10); the first screw rod (3) is sleeved outside the push rod (14); one end of the first screw rod (3) is threadedly connected to the first nut (10), and the first screw rod (3) rotates to drive the first nut (10) to perform linear motion along the axial direction of the first screw rod (3); the first motor (12) drives the first screw rod (3) to rotate; A locking mechanism, the locking mechanism comprising a second screw rod (4), a second nut (5), a bushing (6), a locking piece (7), and a spring (8); the two ends of the spring (8) are respectively connected to the piston rod (9) and the bushing (6); the piston rod (9) is provided with a through hole cooperating with the locking piece (7), the inner surface of the outer cylinder (1) is provided with a groove cooperating with the locking piece (7), the locking piece (7) is arranged in the through hole, and the locking piece (7) can move along the radial direction of the piston rod (9); the bushing (6) is sleeved on the first screw rod (3), the bushing (6) is provided with a locking part and an unlocking part, the locking part is used to press the locking piece (7) into the groove, and the unlocking part can provide a space for the locking piece (7) to move in a direction away from the groove and enable the locking piece (7) to escape from the groove; An unlocking mechanism, the unlocking mechanism comprising a second motor (11), a second screw rod (4) and a second nut (5); the second screw rod (4) is sleeved outside the first screw rod (3) and fixedly connected to the outer cylinder (1); the second nut (5) is threadedly connected to the second screw rod (4); one end of the second nut (5) abuts against the unlocking bushing (6); the second motor (11) drives the second nut (5) to rotate and move axially along the second screw rod (4); A control system is provided, wherein the control system is used to control the first motor (12) and the second motor (11) to control the unlocking mechanism to unlock the piston assembly and the locking mechanism to lock the piston assembly.

2. The energy storage actuation system according to claim 1, characterized in that: The first motor (12) and the first screw rod (3) cooperate with each other via gears.

3. The energy storage actuation system according to claim 1, characterized in that: The second motor (11) and the second nut (5) cooperate with each other via gears.

4. The energy storage actuation system according to claim 1, characterized in that: A D-shaped shaft hole matching structure is formed between the first nut (10) and the piston rod (9).

5. The energy storage actuation system according to claim 1, characterized in that: A D-shaped shaft hole matching structure is formed between the piston rod (9) and the outer cylinder (1).

6. The energy storage actuation system according to claim 1, characterized in that: The locking piece (7) is a steel ball.

7. A control method for the energy storage actuation system according to any one of claims 1 to 6, characterized in that: Including unlocking control and locking control of the piston assembly; The unlocking control includes: Controlling the second motor (11) to rotate forward, driving the second nut (5) to move in the direction of the bushing (6), releasing the locking mechanism from locking the piston assembly, and allowing the piston assembly to extend; Controlling the second motor (11) to rotate in reverse to drive the second nut (5) back to its initial position; The locking control includes: Controlling the first motor (12) to rotate forward, driving the first nut (10) and the piston assembly to move toward the closed end of the outer tube (1), until the locking mechanism locks the piston assembly; The first motor (12) is controlled to rotate in reverse to drive the first nut (10) back to its initial position.

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