Airbag-driven large-stroke opening cylinder actuator

Abstract

The present invention relates to a large-stroke opening cylinder actuating device driven by an airbag, which comprises a guiding cylinder provided with a sliding groove along the length direction. A flexible airbag is arranged in the guiding cylinder. The rear end of the flexible airbag is fixedly connected with the rear end of the guiding cylinder through a rear flange. The rear flange is connected with an air charging and discharging assembly. The front end of the flexible airbag is connected with a piston through a front flange. A slider which is matched with the sliding groove of the guiding cylinder and extends out of the guiding cylinder is fixed on the piston. The slider is used for connecting a load. It has the advantages of simple structure, low cost, good sealing performance, strong adaptability, safety and reliability.

Description

Technical Field

[0001] The present invention relates to an actuator, and more particularly to a large-stroke opening cylinder actuating device driven by an airbag. Background Art

[0002] The grooved (notched) cylinder actuating device is mainly used for the short-distance takeoff boost of an aircraft. Based on the need for the piston to extend out and connect to the aircraft landing gear, a through chute (notch) in the length direction must be opened on the cylinder barrel. For the existing grooved cylinder actuating device, to solve the problem that the groove affects airtightness, a zipper-type sealing steel belt and a supporting pressure-bearing cylinder head need to be equipped, which not only increases the structural complexity but also has low sealing reliability. At the same time, because the cylinder barrel needs to bear a large air pressure, to solve the problem that the groove affects strength, currently in this field, the cylinder barrel usually adopts a way that the inner and outer circumferential walls are not concentric, that is, the cylinder barrel wall gradually thickens along the circumference towards the grooved part, and this structure greatly increases the manufacturing difficulty and production cost of the cylinder barrel. Summary of the Invention

[0003] The purpose of the present invention is to provide a large-stroke opening cylinder actuating device driven by an airbag, which has the advantages of simple structure, low cost, good airtightness, strong adaptability, safety and reliability.

[0004] To solve the above problems existing in the prior art, the present invention provides a large-stroke opening cylinder actuating device driven by an airbag, which includes a guide cylinder provided with a chute along the length direction. A flexible airbag is arranged in the guide cylinder. The rear end of the flexible airbag is fixedly connected to the rear end of the guide cylinder through a rear flange. The rear flange is connected with a charging and discharging assembly. The front end of the flexible airbag is connected with a piston through a front flange. A slider that cooperates with the chute of the guide cylinder and extends out of the guide cylinder is fixed on the piston, and the slider is used to connect a load.

[0005] Further, in a large-stroke opening cylinder actuating device driven by an airbag according to the present invention, a buffer is provided at the front end of the guide cylinder. The buffer includes a water storage cylinder fixedly connected to the guide cylinder. A multi-stage cylinder that is hermetically slidably fitted with the inner wall of the water storage cylinder is arranged in the water storage cylinder. The front end of the central cylinder of the multi-stage cylinder is closed by a plug plate. A pipe fitting is fixedly sealed at the front end of the water storage cylinder. An overflow valve is arranged on the pipe fitting. A blind plate is fixedly sealed at the front end of the pipe fitting. A buffer ejector rod that cooperates with the plug plate is arranged in the middle of the front side of the piston.

[0006] Further, in a large-stroke opening cylinder actuating device driven by an airbag according to the present invention, the charging and discharging assembly includes a charging pipeline and a discharging pipeline that are fixed on the rear flange and communicated with the flexible airbag. Gas cylinder connectors are respectively arranged at the ends of the charging pipeline and the discharging pipeline. A pressure controller is arranged between the charging pipeline and the discharging pipeline. A gas release valve is arranged on the discharging pipeline.

[0007] Further, for an actuator device with a large-stroke open cylinder based on airbag drive according to the present invention, a connecting cylinder is coaxially fixed to the rear side of the piston, a transfer flange is coaxially fixed to the rear end of the connecting cylinder, a clamping seat is fixed to the peripheral wall of the connecting cylinder, the front flange of the flexible airbag is fixedly connected to the transfer flange, and the slider is fixed to the clamping seat through a U-shaped fork head.

[0008] Further, for an actuator device with a large-stroke open cylinder based on airbag drive according to the present invention, annular ribs are provided on the outer wall of the guide cylinder at intervals along the length direction.

[0009] Further, for an actuator device with a large-stroke open cylinder based on airbag drive according to the present invention, plate ribs flush with both side walls of the chute are respectively provided on the outer wall of the guide cylinder.

[0010] Further, for an actuator device with a large-stroke open cylinder based on airbag drive according to the present invention, a support ear is provided on the slider, and a pin shaft hole is provided on the support ear.

[0011] Further, for an actuator device with a large-stroke open cylinder based on airbag drive according to the present invention, a rear annular platform is provided on the inner wall of the rear end of the water storage cylinder, a front annular platform is provided on the inner wall of the front end of the water storage cylinder, and the rear annular platform and the front annular platform are used to block the multi-stage cylinder.

[0012] Further, for an actuator device with a large-stroke open cylinder based on airbag drive according to the present invention, both ends of the pipe fitting are respectively fixedly connected to the water storage cylinder and the blind plate through flange structures, and sealing gaskets are respectively provided between the pipe fitting and the water storage cylinder and the blind plate.

[0013] Further, for an actuator device with a large-stroke open cylinder based on airbag drive according to the present invention, the flexible airbag includes a bladder formed by weaving fiber materials and a sealing layer covering the inner and outer surfaces of the bladder, and the sealing layer is a resin layer formed by impregnation or a resin film pasted on the bladder.

[0014] Compared with the prior art, a large-stroke opening cylinder actuating device based on airbag driving of the present invention has the following advantages: By providing a guiding cylinder, a chute along the length direction is opened in the guiding cylinder. A flexible airbag is arranged in the guiding cylinder, and the rear end of the flexible airbag is fixedly connected to the rear end of the guiding cylinder through a rear flange. The rear flange is connected to an air charging and discharging assembly. The front end of the flexible airbag is connected to a piston through a front flange. A slider that cooperates with the chute of the guiding cylinder and extends out of the guiding cylinder is fixed on the piston. Thus, a large-stroke opening cylinder actuating device based on airbag driving with simple structure, low cost, good sealing performance, strong adaptability, safety and reliability is formed. In practical applications, the guiding cylinder is fixed, and the load is connected to the slider. When the flexible airbag is inflated and expanded through the air charging and discharging assembly, the piston and the load connected through the slider can be pushed to move forward at high speed from the rear to the front, so as to achieve the technical purpose of boosting the load. After the boosting is completed, the flexible airbag is deflated through the air charging and discharging assembly, and the slider can be pushed backward to reset. Compared with the prior art, the zipper-type sealing steel belt and the supporting pressure-bearing cylinder head are omitted, which not only reduces the structural complexity, but also reduces the load of the guiding cylinder by the flexible airbag bearing the air pressure. The guiding cylinder only plays a guiding role, improving the sealing reliability and reducing the manufacturing difficulty and production cost of the guiding cylinder.

[0015] The following further elaborates on a large-stroke opening cylinder actuating device based on airbag driving of the present invention in conjunction with the specific embodiments shown in the drawings. Brief Description of the Drawings

[0016] Figure 1 is a structural schematic diagram of a large-stroke opening cylinder actuating device based on airbag driving of the present invention;

[0017] Figure 2 is Figure 1 a partial enlarged view of position A in

[0018] Figure 3 is Figure 1 a partial enlarged view of position B in

[0019] Figure 4 is Figure 1 a view in the C-C direction in

[0020] Figure 5 is a structural schematic diagram of a buffer in the present invention. Specific Embodiments

[0021] First of all, it should be noted that the orientation words such as up, down, left, right, front, and rear described in the present invention are only for description according to the drawings for the convenience of understanding, and do not limit the technical solution and the scope of protection claimed of the present invention.

[0022] As Figures 1 to 5The specific implementation of an actuator device for a large-stroke opening cylinder based on airbag drive according to the present invention is shown. It includes a guide cylinder 1, with a chute opened along the length direction in the guide cylinder 1. A flexible airbag 2 is arranged in the guide cylinder 1. The rear end of the flexible airbag 2 is fixedly connected to the rear end of the guide cylinder 1 through a rear flange 21, and the rear flange 21 is connected to an air charging and discharging assembly 3. The front end of the flexible airbag 2 is connected to a piston 4 through a front flange 22, and a slider 5 that cooperates with the chute of the guide cylinder 1 and extends out of the guide cylinder 1 is fixed on the piston 4. Through the above structural settings, an actuator device for a large-stroke opening cylinder based on airbag drive with simple structure, low cost, good sealing performance, strong adaptability, safety and reliability is formed. In practical applications, the guide cylinder 1 is fixed, and the load 100 is connected to the slider 5. When the flexible airbag 2 is inflated and expanded through the air charging and discharging assembly 3, the piston 4 and the load 100 connected through the slider 5 can be pushed to move forward at high speed from the rear to the front, so as to achieve the technical purpose of boosting the load 100. After the boosting is completed, the flexible airbag 2 is deflated through the air charging and discharging assembly 3, and the slider 5 is pushed backward to reset. Compared with the prior art, the zipper-type sealing steel belt and the supporting pressure-bearing cylinder head are omitted, which not only reduces the structural complexity, but also reduces the load on the guide cylinder by the flexible airbag 2 bearing the air pressure. The guide cylinder 1 only plays a guiding role, improving the sealing reliability and reducing the manufacturing difficulty and production cost of the guide cylinder 1. It should be noted that to ensure the deformation ability and sealing performance of the flexible airbag 2, the present invention usually makes the flexible airbag 2 adopt the following structural form: a capsule body is formed by weaving fiber materials, and a sealing layer is coated on the inner and outer surfaces of the capsule body. The sealing layer can be a resin layer formed by soaking or a resin film pasted on the capsule body, etc. The fiber materials can be ultra-high molecular weight polyethylene fibers or aramid fibers, etc., as long as they can achieve flexible deformation and meet the sealing requirements. The weaving method of the capsule body can be single-layer, double-layer or three-dimensional weaving. In addition, to ensure the stable and reliable connection, the present invention usually makes the two ends of the flexible airbag 2 be connected to the rear flange 21 and the front flange 22 respectively through a pressing plate and a snap ring structure. This connection and fixing method is a conventional technical means in the art and will not be elaborated here.

[0023] As an optimization solution, to improve the stability and safety of the structure and movement, a buffer 6 is provided at the front end of the guide cylinder 1 in this specific embodiment. The specific structure of the buffer 6 is as follows: it includes a water storage cylinder 61 fixedly connected to the guide cylinder 1, and a multi-stage cylinder 62 is arranged in the water storage cylinder 61 and is in sealed sliding fit with its inner wall. The front end of the central cylinder 621 of the multi-stage cylinder 62 is closed by a plug plate 622; a pipe fitting 63 is fixedly sealed at the front end of the water storage cylinder 61, an overflow valve 64 is arranged on the pipe fitting 63, and a blind plate 65 is fixedly sealed at the front end of the pipe fitting 63. Among them, a buffer push rod 41 that cooperates with the plug plate 622 is fixedly installed in the middle of the front side of the piston 4. The buffer 6 thus arranged has the characteristics of simple structure, low cost, good buffer effect, and strong adaptability. When the buffer push rod 41 running at high speed presses against the plug plate 622, the multi-stage cylinder 62 will gradually expand and move forward in the water storage cylinder 61, and the buffer purpose can be achieved by using the gradually increasing resistance of the water pressure on the multi-stage cylinder 62. When the water pressure in the water storage cylinder 61 reaches the set threshold value, the overflow valve 64 will automatically open for pressure relief, ensuring safety and reliability. In practical applications, to prevent the multi-stage cylinder 62 from detaching from the water storage cylinder 61, a rear ring platform 611 is provided on the inner wall of the rear end of the water storage cylinder 61, and a front ring platform 612 is provided on the inner wall of the front end of the water storage cylinder 61 to block the multi-stage cylinder 62 through the rear ring platform 611 and the front ring platform 612.

[0024] As a specific embodiment, the present invention adopts the following structure for the air charging and discharging assembly 3: It includes an air charging pipeline 31 and an air discharging pipeline 32 that are fixed on the rear flange 21 and communicate with the flexible airbag 2. Gas cylinder connectors 33 are respectively arranged at the end parts of the air charging pipeline 31 and the air discharging pipeline 32 to connect a high-pressure gas cylinder serving as a gas source. A pressure controller 34 is arranged between the air charging pipeline 31 and the air discharging pipeline 32 to control the charging pressure and flow rate. And an air discharging valve 35 is arranged on the air discharging pipeline 32 so as to deflate the flexible airbag 2 through the air discharging valve 35 after the boosting is completed. It should be noted that the pressure controller 34 is a commonly used device in the art, and its structure and connection method are well known to those skilled in the art, so they will not be elaborated here; the air charging and discharging assembly 3 is not limited to the listed structural forms and can also adopt other structures with the same functions, and can also achieve the technical purpose of the present invention. As a specific embodiment, the present invention coaxially fixes a connecting cylinder 42 at the rear side of the piston 4, coaxially fixes a transfer flange 43 at the rear end of the connecting cylinder 42, and fixes a clamping seat 44 on the peripheral wall of the connecting cylinder 42. Among them, the front flange 22 of the flexible airbag 2 is fixed to the transfer flange 43, and the slider 5 is fixed to the clamping seat 44 through a U-shaped fork head. This setting improves the disassembly and assembly convenience and is beneficial to enhancing the stability of the structure and movement. To improve the structural strength, in this specific embodiment, annular ribs 11 are arranged on the outer wall of the guide cylinder 1 at intervals along the length direction, and plate ribs 12 flush with both side walls of the chute are respectively arranged on the outer wall of the guide cylinder 1. In actual application, the present invention also arranges a support ear 51 on the slider 5 and a pin shaft hole 52 on the support ear 51 to connect a load through a pin shaft installed in the pin shaft hole 52. And both ends of the pipe fitting 63 are respectively fixedly connected to the water storage cylinder 61 and the blind plate 65 through flange structures, and gaskets (not shown in the figure) are respectively arranged between the pipe fitting 63 and the water storage cylinder 61 and the blind plate 65 to ensure the sealing performance. It should be noted that the load herein refers to an object that needs to be boosted, such as an aircraft.

[0025] Actual applications have shown that the large-stroke open cylinder actuator based on airbag drive provided by the present invention can produce the following beneficial effects: a. Using a flexible airbag to seal the working medium (gas) eliminates the complex zipper-type sealing steel belt and pressure-bearing cylinder head, simplifies the structure, and improves safety and reliability; b. By using the flexible airbag to bear the high pressure of the working medium, the load on the guide cylinder is reduced, which is beneficial to reducing the weight of the guide cylinder and does not require an eccentric cylinder structure, reducing the manufacturing difficulty and production cost.

[0026] The above embodiments are only descriptions of the preferred embodiments of the present invention and do not limit the scope of protection requested by the present invention. Without departing from the design concept of the present invention, various deformations made by those skilled in the art based on the technical solution of the present invention should fall within the protection scope determined by the claims of the present invention.

Claims

1. A large-stroke opening cylinder actuating device based on airbag drive, characterized in that, It includes a guiding cylinder (1) provided with a sliding groove along the length direction. A flexible airbag (2) is arranged in the guiding cylinder (1). The rear end of the flexible airbag (2) is fixedly connected with the rear end of the guiding cylinder (1) through a rear flange (21). The rear flange (21) is connected with an air charging and discharging assembly (3). The front end of the flexible airbag (2) is connected with a piston (4) through a front flange (22). A slider (5) that cooperates with the sliding groove of the guiding cylinder (1) and extends out of the guiding cylinder (1) is fixed on the piston (4). The slider (5) is used to connect a load. A buffer (6) is arranged at the front end of the guiding cylinder (1). The buffer (6) includes a water storage cylinder (61) fixedly connected with the guiding cylinder (1). A multi-stage cylinder (62) that is hermetically and slidably matched with the inner wall of the water storage cylinder (61) is arranged in the water storage cylinder (61). The front end of the central cylinder (621) of the multi-stage cylinder (62) is closed by a plug plate (622). A pipe fitting (63) is fixedly sealed at the front end of the water storage cylinder (61). An overflow valve (64) is arranged on the pipe fitting (63). A blind plate (65) is fixedly sealed at the front end of the pipe fitting (63). A buffer ejector rod (41) that cooperates with the plug plate (622) is arranged in the middle of the front side of the piston (4).

2. The large-stroke opening cylinder actuator based on airbag drive according to claim 1, characterized in that The air charging and discharging assembly (3) includes an air charging pipeline (31) and an air discharging pipeline (32) that are fixed on the rear flange (21) and communicated with the flexible airbag (2). Gas cylinder connectors (33) are respectively arranged at the ends of the air charging pipeline (31) and the air discharging pipeline (32). A pressure controller (34) is arranged between the air charging pipeline (31) and the air discharging pipeline (32). An air discharging valve (35) is arranged on the air discharging pipeline (32).

3. The large-stroke opening cylinder actuator based on airbag drive according to claim 2, characterized in that, A connecting cylinder (42) is coaxially fixed on the rear side of the piston (4). A transfer flange (43) is coaxially fixed at the rear end of the connecting cylinder (42). A clamping seat (44) is fixed on the peripheral wall of the connecting cylinder (42). The front flange (22) of the flexible airbag (2) is fixedly connected with the transfer flange (43). The slider (5) is fixed on the clamping seat (44) through a U-shaped fork head.

4. The airbag-driven large-stroke opening cylinder actuator according to claim 3, characterized in that, Circular ribs (11) are arranged on the outer wall of the guiding cylinder (1) at intervals along the length direction.

5. The airbag-driven large-stroke opening cylinder actuator according to claim 3, characterized in that, Plate ribs (12) flush with the two side walls of the sliding groove are respectively arranged on the outer wall of the guiding cylinder (1).

6. The airbag-driven large-stroke opening cylinder actuator according to claim 3, characterized in that Ears (51) are arranged on the slider (5). Pin holes (52) are arranged on the ears (51).

7. The large-stroke opening cylinder actuator based on airbag drive according to claim 3, wherein A rear ring platform (611) is arranged on the inner wall at the rear end of the water storage cylinder (61). A front ring platform (612) is arranged on the inner wall at the front end of the water storage cylinder (61). The rear ring platform (611) and the front ring platform (612) are used to block the multi-stage cylinder (62).

8. The airbag-driven large-stroke opening cylinder actuator according to claim 3, wherein The two ends of the pipe fitting (63) are respectively fixedly connected with the water storage cylinder (61) and the blind plate (65) through flange structures. Sealing gaskets are respectively arranged between the pipe fitting (63) and the water storage cylinder (61) and the blind plate (65).

9. The large-stroke opening cylinder actuator based on airbag drive according to claim 3, characterized in that, The flexible airbag (2) includes a bladder formed by weaving fiber materials and a sealing layer covering the inner and outer surfaces of the bladder. The sealing layer is a resin layer formed by impregnation or a resin film pasted on the bladder.

Images