CN115817804A

CN115817804A - Novel dual-redundancy electric actuating cylinder

Info

Publication number: CN115817804A
Application number: CN202211535186.1A
Authority: CN
Inventors: 延杰; 黄伟峰; 杜朝阳; 侯慧中
Original assignee: Shaanxi Yufeng Intelligent Equipment Co ltd
Current assignee: Shaanxi Yufeng Intelligent Equipment Co ltd
Priority date: 2022-11-30
Filing date: 2022-11-30
Publication date: 2023-03-21

Abstract

The invention discloses a novel dual-redundancy electric actuating cylinder, which is characterized in that two groups of driving devices, a worm gear, a piston rod, an outer cylinder and a displacement sensor are matched, a landing gear retractable actuating cylinder and a flap actuator cylinder are convenient to adopt a full-electric dual-redundancy design, the safety of a system can be improved, the light weight of the whole machine is realized, the cost is low, the control precision is high, the later maintenance is convenient, the electric actuating cylinder adopts the dual-redundancy design, under the normal condition, double motors work simultaneously, if one path of power supply, a control driver or the motor fails, the other path of power supply, the control driver and the motor can still work normally to complete the actuation, the safe and reliable operation of the system is ensured, the displacement sensor and the two groups of driving devices are matched, the electric actuating cylinder adopts electric control and electric execution, the control precision is high, the response speed is high, the BIT self-checking means is convenient, the system failure can be quickly detected and positioned, special equipment is not needed for the later maintenance, and the cost is low.

Description

Novel dual-redundancy electric actuating cylinder

Technical Field

The invention belongs to the technical field of mechanical equipment actuation, and particularly relates to a novel dual-redundancy electric actuating cylinder.

Background

The landing gear and the flaperon are used as an important component unit for attitude adjustment of the plane such as take-off, landing, turning, pitching and the like, whether the plane can safely take off, land and fly is determined, and the landing gear retractable actuator cylinder is used as an important component part for taking off, land and the flaperon actuator cylinder as the airplane flying attitude adjustment and is one of the core components of the plane movement, so that the landing gear retractable actuator cylinder and the flaperon actuator cylinder have faults and directly influence the safety of the plane; the traditional hydraulic landing gear retractable actuator cylinder and the flaperon actuator cylinder are required to be provided with hydraulic systems, so that the cost is high, the weight is heavy, the cost and the weight of the whole airplane can be increased if a redundant design is used, and the later maintenance cost is high.

Therefore, a novel dual-redundancy electric actuating cylinder is provided to solve the problems in the prior art, and the undercarriage folding and unfolding actuating cylinder and the flap actuator cylinder adopt a full-electric dual-redundancy design, so that the safety of a system can be improved, the light weight and low cost of the whole machine are realized, the control precision is high, and the later maintenance is convenient.

Disclosure of Invention

The invention aims to provide a novel dual-redundancy electric actuating cylinder, which aims to solve the problems that the cost is high, the weight is heavy, the cost and the weight of the whole airplane are increased if a redundant design is used, and the later maintenance cost is high in the prior art.

In order to realize the purpose, the invention adopts the following technical scheme:

a novel dual-redundancy electric actuating cylinder comprises a reduction box body, wherein one side of the reduction box body is fixedly connected with an end cover lug through a plurality of groups of hexagon bolts, a second ball bearing is arranged in the end cover lug, the other side of the reduction box body is fixedly connected with an outer cylinder through a plurality of groups of hexagon bolts, an inner gasket is arranged between the outer cylinder and the reduction box body, two groups of worm gears, two groups of worms, two groups of first bearings, a second bearing and a turnover gear are arranged in the reduction box body, the two groups of first bearings are arranged at the opposite ends of the two groups of worm gears, the second bearing is arranged at the opposite end of the two groups of worm gears, the gearbox is characterized in that two sets of driving devices are arranged on the other side of the gearbox body and are both direct current motors, conical gears are arranged on output shafts of the two sets of driving devices and are meshed with two sets of worms respectively, the worms are meshed with two sets of worm gears respectively, the epicyclic gears are meshed with the two sets of worm gears, the epicyclic gears are connected with ball screws in a transmission mode, the ball screws are arranged in the outer barrel, one end of each ball screw is connected with a screw nut in a threaded mode, a piston rod is sleeved on the outer wall of each screw nut, a bushing is sleeved on the side wall of each piston rod, and one end of each bushing is arranged at one end of the outer barrel.

Preferably, one end of one of the worm gears is provided with a base, one end of the other worm gear is provided with a third bearing, the ball screw is inserted into the inner side wall of the third bearing and is in transmission connection with the third bearing, a bearing sleeve is arranged in the reduction gearbox box body, and the third bearing is arranged in the inner cavity of the bearing sleeve.

Preferably, an end cover body is arranged at one end of the outer barrel and fixedly connected with one end of the outer barrel through a plurality of groups of hexagon bolts, a round hole for the insertion of the piston rod is formed in one side of the end cover body, and a shaft sleeve is arranged on the inner wall of the round hole.

Preferably, the shaft sleeve is sleeved on the side wall of the piston rod, the inner wall of the shaft sleeve is in sliding connection with the outer wall of the piston rod, one end of the shaft sleeve is abutted to one end of the bushing, a protruding block is integrally formed on one side of the end cover body, and a through hole for inserting the displacement sensor is formed in one side of the protruding block.

Preferably, one end of the displacement sensor is arranged at one fixed end of the outer cylinder and the reduction gearbox body, the displacement sensor is arranged between the two sets of driving devices, one end of the piston rod is provided with a joint, and the side wall of the joint is provided with a rotation stopping nut.

Preferably, the other end of the displacement sensor is fixedly connected with a rotation stopping gasket, one end of the joint penetrates through the rotation stopping gasket and is inserted into one end of the piston rod, one side of the rotation stopping gasket is abutted against one side of the rotation stopping nut, and a first ball bearing is installed on the inner wall of the joint.

Preferably, the two sides of the box body of the reduction gearbox are fixedly connected with maintenance windows through a plurality of groups of hexagon bolts, the maintenance windows are both arranged in an arc-shaped plate, and the two groups of maintenance windows are respectively arranged in a corresponding mode with the two groups of bevel gears.

Preferably, the two sets of driving devices are connected in series through two sets of worms, and the two sets of driving devices are electrically connected with the displacement sensor.

Preferably, the axle center of the ball screw and the axle center of the piston rod are arranged on the same straight line, and the ball screw is connected with the piston rod in a sliding mode through a screw nut.

Preferably, the piston rod is connected with the outer barrel in a sliding mode, one end of the piston rod is fixedly connected with the screw nut, and the ball screw is in transmission connection with the third bearing.

Compared with the prior art, the novel dual-redundancy electric actuating cylinder provided by the invention has the following advantages:

1. the invention mainly adopts the cooperation between two groups of driving devices, a worm gear, a piston rod, an outer cylinder and a displacement sensor, so that the undercarriage retraction actuator cylinder and the flaperon actuator cylinder adopt a full-electric dual-redundancy design, the system safety can be improved, the whole machine is light in weight and low in cost, the control precision is high, the later maintenance is convenient, the electric actuator cylinder adopts a dual-redundancy design, and double motors work simultaneously under normal conditions, if one power supply, the control driver or the motor fails, the other power supply, the control driver and the motor can still work normally to complete actuation, thereby ensuring the safe and reliable operation of the system;

2. through the matching of the displacement sensor and the two groups of driving devices, the electric actuating cylinder is controlled by electric transmission and is electrically executed, the control precision is high, the response speed is high, a BIT self-checking means is conveniently adopted, the system fault can be quickly detected and positioned, special equipment is not needed for later maintenance, the maintenance is convenient, and the cost is low;

3. according to the invention, through the matching among the piston rod, the outer cylinder, the ball screw and the screw nut, the traditional hydraulic actuator cylinder needs to be provided with a hydraulic source and a hydraulic system, the system is complex, the cost is high, the weight is large, the electric actuator cylinder has a simple and reliable structure, and the power supply of an airplane system is used, so that the weight and the cost of the whole machine can be reduced.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic cross-sectional view of the present invention;

FIG. 3 is a schematic sectional view of the reduction box according to the present invention;

fig. 4 is an enlarged schematic view of a portion a in fig. 2.

In the figure: 1. a reduction box body; 2. repairing the window; 3. a drive device; 4. an outer cylinder; 5. an end cap body; 6. a shaft sleeve; 7. a piston rod; 8. a displacement sensor; 9. a rotation stopping gasket; 10. a rotation stopping nut; 11. a joint; 12. a first ball bearing; 13. an end cap tab; 14. a second ball bearing; 15. a first bearing; 16. an epicyclic gear; 17. a worm; 18. a second bearing; 19. a worm gear; 20. a bearing housing; 21. an inner gasket; 22. a third bearing; 23. a ball screw; 24. a lead screw nut; 25. a bushing; 26. a bevel gear.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The specific embodiments described herein are merely illustrative of the invention and do not delimit the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a novel dual-redundancy electric actuator cylinder as shown in figures 1-4, which comprises a reduction gearbox box body 1, wherein one side of the reduction gearbox box body 1 is fixedly connected with an end cover lug 13 through a plurality of groups of hexagon bolts, a second ball bearing 14 is arranged in the end cover lug 13, the other side of the reduction gearbox box body 1 is fixedly connected with an outer cylinder 4 through a plurality of groups of hexagon bolts, an inner gasket 21 is arranged between the outer cylinder 4 and the reduction gearbox box body 1, two groups of worm gears 19, two groups of worms 17, two groups of first bearings 15, a second bearing 18 and a turnover gear 16 are arranged in the reduction gearbox box body 1, the two groups of first bearings 15 are arranged at opposite ends of the two groups of worm gears 19, the second bearing 18 is arranged at one end of the two groups of worm gears 19 which are abutted, two groups of driving devices 3 are arranged at the other side of the reduction gearbox box body 1, the two groups of driving devices 3 are direct current motors, conical gears 26 are arranged on output shafts of the two groups of driving devices 3, the two groups of conical gears 26 are respectively meshed with the two groups of worms, the two groups of worm gears 17 are respectively meshed with the two groups of worm gears 19, the worm gears 16 are connected with a ball screw nut 24, a ball screw 23 is arranged in the outer cylinder 4, a nut 7 is arranged at one end of the outer cylinder 4, a piston rod bushing 25 is sleeved on the outer cylinder, and a piston rod of the outer cylinder is sleeved with a piston rod of the outer cylinder 4, and a piston rod of the piston rod 25.

When the airplane wing reciprocating actuator is used, the two groups of driving devices 3 are direct-current motors, the two groups of direct-current motors realize reduction of rotating speed and amplification of torque through the transmission mechanisms such as the two groups of worm gears 19, the two groups of worms 17 and the epicyclic gears 16, the ball screw 23 is driven to rotate later, so that the lead screw nut 24 braked circumferentially is driven to realize linear reciprocating motion, the lead screw nut 24 in linear motion is connected with the piston rod 7, finally the piston rod 7 is driven to reciprocate, actuation of the airplane landing gear and the wing of the airplane is realized, meanwhile, the direct-current motors are controlled and driven by the controller through signals fed back by the linear displacement sensor 8, the piston rod 7 is driven to reciprocate by the electric actuator by adopting a dual-redundancy design, the two motors jointly drive the piston rod 7 to reciprocate through the epicyclic gear and the ball screw 23, the worm gears 17 adopt a self-locking design, the rotation of the two motors is ensured to be independent, the two motors can control and drive through two independent power supplies and a control driver on the airplane, the two motors work simultaneously under normal conditions, the reciprocating motion of the piston rod 7 is driven to jointly, if one power supply is encountered, the control driver or the motor fails, the other power supply, the control of the other motor can still work normally, the operation of the actuator can be completed, the whole airplane can be ensured, the safety and the system can be operated safely and the weight of the whole system can be reduced, and the high-weight of the whole system can be conveniently maintained, and the high-low-cost control system is convenient for later maintenance.

One end of the worm wheel 19 is provided with a base, one end of the other worm wheel 19 is provided with a third bearing 22, the ball screw 23 is inserted into the inner side wall of the third bearing 22, the ball screw 23 is in transmission connection with the third bearing 22, a bearing sleeve 20 is arranged in the reduction gearbox box body 1, and the third bearing 22 is arranged in the inner cavity of the bearing sleeve 20.

The one end of urceolus 4 is provided with end cover body 5, and end cover body 5 is through the one end fixed connection of multiunit hex bolts with urceolus 4, and the round hole that supplies piston rod 7 to peg graft is seted up to one side of end cover body 5, and the inner wall of round hole is provided with axle sleeve 6, and the flexible frictional force of piston rod 7 is reduced in the connection of the piston rod 7 of being convenient for, increases life.

The lateral wall at piston rod 7 is established to 6 covers of axle sleeve, and the outer wall sliding connection of 6 inner walls of axle sleeve and piston rod 7, and the one end of axle sleeve 6 is inconsistent with the one end of bush 25, and one side integrated into one piece of end cover body 5 has the lug, and the through-hole that supplies displacement sensor 8 to peg graft is seted up to one side of lug, is convenient for control DC motor through displacement sensor 8, and two sets of DC motor pass through the signal of displacement sensor 8 feedback, are controlled and are driven by the controller.

One end of a displacement sensor 8 is arranged at one fixed end of the outer barrel 4 and the reduction gearbox body 1, the displacement sensor 8 is arranged between the two sets of driving devices 3, a connector 11 is arranged at one end of the piston rod 7, and a rotation stopping nut 10 is arranged on the side wall of the connector 11, so that the braking distance of the airplane can be conveniently controlled, and the airplane falling is completed.

The other end fixedly connected with of displacement sensor 8 splines gasket 9, and the one end of joint 11 runs through the one end of splines gasket 9 and pegs graft in the one end of piston rod 7, and one side of the gasket 9 that splines is inconsistent with one side of the nut 10 that splines, and first ball bearing 12 is installed to the inner wall of joint 11, increases the intensity of undercarriage bottom to increase its life.

The both sides of reducing gear box 1 all are through multiunit hexagon bolt fixedly connected with maintenance window 2, and two sets of maintenance windows 2 are the arc setting, and two sets of maintenance windows 2 are corresponding the setting with two sets of conical gear 26 respectively, open maintenance window 2 and be convenient for carry out the periodic maintenance to reducing gear box 1 inside and overhaul.

Two sets of drive arrangement 3 establishes ties through two sets of worms 17, and two sets of drive arrangement 3 all with displacement sensor 8 electric connection, increase the wholeness of pressurized strut to reduce the friction between each part of the internal portion of reducing gear box 1, increase the life of each part, improve the accuracy.

The axle center of the ball screw 23 and the axle center of the piston rod 7 are arranged on the same straight line, and the ball screw 23 is connected with the piston rod 7 in a sliding mode through the screw nut 24, so that the connection precision of all parts is improved, and the response speed is improved.

The piston rod 7 is connected with the outer cylinder 4 in a sliding mode, one end of the piston rod 7 is fixedly connected with the screw nut 24, the ball screw 23 is in transmission connection with the third bearing 22, and the structure is simple and reliable.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments, or make equivalent substitutions and improvements to part of the technical features of the foregoing embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a novel dual-redundancy electric actuator cylinder, includes reducing gear box (1), its characterized in that: one side of the reduction gearbox body (1) is fixedly connected with an end cover lug (13) through a plurality of groups of hexagon bolts, a second ball bearing (14) is arranged in the end cover lug (13), the other side of the reduction gearbox body (1) is fixedly connected with an outer barrel (4) through a plurality of groups of hexagon bolts, an inner gasket (21) is arranged between the outer barrel (4) and the reduction gearbox body (1), two groups of worm gears (19), two groups of worms (17), two groups of first bearings (15), a second bearing (18) and a turnover gear (16) are arranged in the reduction gearbox body (1), the two groups of first bearings (15) are arranged at the opposite ends of the two groups of worm gears (19), the second bearing (18) is arranged at one end of the two groups of worm gears (19) which are in contact, two groups of driving devices (3) are arranged at the other side of the reduction gearbox body (1), the two groups of driving devices (3) are both direct current motors, two groups of bevel gears (26) are arranged on output shafts of the two groups of driving devices (3), the bevel gears (26) are respectively engaged with the two groups of worm gears (17), the two groups of worm gears (16) are respectively engaged with the two groups of worm gears (23), and the ball screws (23) are connected with the outer barrel (23), one end threaded connection of ball (23) has screw nut (24), and the outer wall cover of screw nut (24) is equipped with piston rod (7), the lateral wall cover of piston rod (7) is equipped with bush (25), and bush (25) set up the one end in urceolus (4).

2. The novel dual redundancy electric ram of claim 1, wherein: one end of the worm wheel (19) is provided with a base, one end of the other worm wheel (19) is provided with a third bearing (22), the ball screw (23) is inserted into the inner side wall of the third bearing (22), the ball screw (23) is in transmission connection with the third bearing (22), a bearing sleeve (20) is arranged in the reduction gearbox box body (1), and the third bearing (22) is arranged in the inner cavity of the bearing sleeve (20).

3. The novel dual redundancy electric ram of claim 1, wherein: the one end of urceolus (4) is provided with end cover body (5), and end cover body (5) pass through the one end fixed connection of multiunit hex bolts and urceolus (4), the round hole that supplies piston rod (7) to peg graft is seted up to one side of end cover body (5), and the inner wall of round hole is provided with axle sleeve (6).

4. A novel dual redundancy electric ram as claimed in claim 3, wherein: the lateral wall at piston rod (7) is established to axle sleeve (6) cover, and the outer wall sliding connection of axle sleeve (6) inner wall and piston rod (7), the one end of axle sleeve (6) is inconsistent with the one end of bush (25), one side integrated into one piece of end cover body (5) has the lug, and the through-hole that supplies displacement sensor (8) to peg graft is seted up to one side of lug.

5. The novel dual redundancy electric ram of claim 4, wherein: one end of the displacement sensor (8) is arranged at one fixed end of the outer cylinder (4) and the reduction gearbox body (1), the displacement sensor (8) is arranged between the two sets of driving devices (3), one end of the piston rod (7) is provided with a joint (11), and the side wall of the joint (11) is provided with a rotation stopping nut (10).

6. The novel dual redundancy electric ram of claim 5, wherein: the other end of the displacement sensor (8) is fixedly connected with a rotation stopping gasket (9), one end of a joint (11) penetrates through the rotation stopping gasket (9) and is connected to one end of the piston rod (7) in an inserting mode, one side of the rotation stopping gasket (9) is abutted to one side of a rotation stopping nut (10), and a first ball bearing (12) is installed on the inner wall of the joint (11).

7. The novel dual redundancy electric ram of claim 1, wherein: reduction box (1) is two sets of maintenance windows (2) through multiunit hexagon bolt fixedly connected with one side adjacent with the end cover auricle, and is two sets of maintenance window (2) are the arc setting, and two sets of maintenance windows (2) are corresponding the setting with two sets of conical gear (26) respectively.

8. The novel dual redundancy electric ram of claim 1, wherein: the two sets of driving devices (3) are connected in series through two sets of worms (17), and the two sets of driving devices (3) are electrically connected with the displacement sensor (8).

9. The novel dual redundancy electric ram of claim 1, wherein: the axle center of the ball screw (23) and the axle center of the piston rod (7) are arranged on the same straight line, and the ball screw (23) is connected with the piston rod (7) in a sliding mode through a screw nut (24).

10. The novel dual redundancy electric ram of claim 9, wherein: the piston rod (7) is in sliding connection with the outer barrel (4), one end of the piston rod (7) is fixedly connected with the screw nut (24), and the ball screw (23) is in transmission connection with the third bearing (22).