CN214930578U - Dual-redundancy electric transmission actuator cylinder - Google Patents

Abstract

The utility model provides a dual-redundancy electric transmission actuating cylinder, which comprises a barrel-shaped integrated shell; the telescopic rod capable of extending is coaxially arranged in the integrated shell, the telescopic rod is sleeved with a screw nut to drive the telescopic rod to extend, and the screw nut is driven by two motors to be synchronously meshed for transmission. The dual-redundancy driving structure of the utility model has the advantages that even if one motor is damaged and can not provide driving force, the other motor can drive the actuating cylinder to work normally; the worm gear can realize larger transmission ratio, reduce the number of transmission speed reduction stages, be favorable to reducing the weight of the actuating cylinder, and realize the slimness and the light weight of the whole structure.

Description

Dual-redundancy electric transmission actuator cylinder

Technical Field

The utility model relates to a dual-redundancy electric transmission actuating cylinder.

Background

At present, the common actuator cylinder of the aircraft landing gear is a hydraulic actuator cylinder or a pneumatic actuator cylinder, and has the advantages of complex structure, heavy weight, low efficiency, slow response time, difficult maintenance and low reliability.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a two redundancy electricity transmission pressurized cylinders, this two redundancy electricity transmission pressurized cylinder transmission compact structure is reliable, and the pressurized cylinder can realize that the telescopic link targets in place to stop according to the position sensor signal to can realize mechanical locking in optional position.

The utility model discloses a following technical scheme can realize.

The utility model provides a dual-redundancy electric transmission actuating cylinder, which comprises a barrel-shaped integrated shell; the telescopic rod capable of extending is coaxially arranged in the integrated shell, the telescopic rod is sleeved with a screw nut to drive the telescopic rod to extend, and the screw nut is driven by two motors to be synchronously meshed for transmission.

The screw nut is in meshing transmission by a worm, and two ends of the worm are respectively in meshing transmission by two motors; the axis of two motors is parallel to each other and all is parallel to integrated casing.

And a driving bevel gear is fixed on an output shaft of the motor, a driven bevel gear is fixed at the end part of the worm, and the driving bevel gear is meshed with the driven bevel gear.

The driving bevel gear is fixed through welding.

The two motors rotate in opposite directions.

And position sensors are respectively arranged at the two ends of the integrated shell, which are positioned at the telescopic limit of the telescopic rod.

The lead angle of the worm is 2.7-3.2 degrees.

And a limiting pin is arranged at the position of the retraction end of the telescopic rod in the integrated shell, and the limiting pin enables the telescopic rod to limit and stop rotation.

The two motors are symmetrically arranged.

The beneficial effects of the utility model reside in that: the dual-redundancy driving structure design ensures that even if one motor is damaged and cannot provide driving force, the other motor can drive the actuating cylinder to normally work; the worm gear can realize larger transmission ratio, reduce the number of transmission speed reduction stages, be favorable to reducing the weight of the actuating cylinder, and realize the slimness and the light weight of the whole structure.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic front view of the structure of FIG. 1, with the integral housing partially broken away for clarity;

FIG. 3 is a left side cross-sectional view taken along the midline of FIG. 2;

fig. 4 is a schematic structural view of the integrated housing of fig. 2.

In the figure: 1-mounting lifting lugs, 2-position sensors, 3-integrated shell, 4-electric connectors, 5-motors, 6-driving bevel gears, 7-driven bevel gears, 8-worms, 9-bearing seat end covers, 10-joint bearings, 11-fastening nuts, 12-lifting rings, 13-telescopic rods, 14-lead screw nuts, 15-worm gears, 16-angular contact bearings, 17-cables, 18-position sensor magnetic steel, 19-limiting pins and 20-side end covers.

Detailed Description

The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.

Example 1

A dual redundancy electro-pneumatic ram as shown in figure 1, comprising a barrel-like integral housing 3; extensible telescopic rod 13 is coaxially arranged in the integrated shell 3, a screw nut 14 is sleeved on the telescopic rod 13 and driven to stretch, and the screw nut 14 is driven by two motors 5 to be synchronously meshed for transmission.

Example 2

Based on embodiment 1, and as shown in fig. 2 and fig. 3, the lead screw nut 14 is engaged and driven by the worm 8, and both ends of the worm 8 are engaged and driven by the two motors 5 respectively; the central axes of the two motors 5 are parallel to each other and are parallel to the integrated housing 3.

Example 3

According to embodiment 2, the output shaft of the motor 5 is fixed with the driving bevel gear 6, the end of the worm 8 is fixed with the driven bevel gear 7, and the driving bevel gear 6 is meshed with the driven bevel gear 7.

Example 4

In embodiment 3, the drive bevel gear 6 is fixed by welding.

Example 5

Based on embodiment 2, the two motors 5 rotate in opposite directions.

Example 6

Based on embodiment 1, and, position sensor 2 is all equipped with to the both ends position that is located the flexible spacing of telescopic link 13 in the integration casing 3.

Example 7

In example 2, the lead angle of the worm 8 was 2.7 ° to 3.2 °.

Example 8

Based on embodiment 1, a limit pin 19 is installed at a position of the integrated housing 3 at the retraction end of the telescopic rod 13, and the limit pin 19 limits the telescopic rod 13 to stop rotating.

Example 9

Based on embodiment 2, and two motors 5 are symmetrically installed.

Example 10

Based on the above embodiment, and the integrated housing 3 has an opening at the end of the worm 8 and is provided with the side end cap 20, which facilitates the installation and maintenance of the transmission structure such as the worm 8. Preferably, the worm lead angle is 3.0175 °.

Example 11

Based on the above embodiment, as shown in fig. 1 to 4, the main components and the power component of the actuator cylinder are driving motors, and the reliability of the actuator cylinder is crucial to the operational reliability of the whole machine, so that the dual motors are symmetrically arranged, and the two motors rotate in opposite directions during operation, that is, power can be transmitted to the same worm through the transmission of the double bevel gears, and the worm drives the worm gear to drive the lead screw nut to rotate, so as to drive the telescopic rod to realize reciprocating linear motion; by adopting the structure scheme, even if one motor is damaged and cannot provide driving force, the other motor can drive the actuating cylinder to normally work.

Firstly, the slender structure is required to be realized, the axis of a motor and the axis of a telescopic rod need to be arranged in parallel, when a transmission structure is selected, the requirement for realizing mechanical locking at any position is considered, and the motor cannot be provided with a brake (if the motor is provided with the brake, one motor can be locked after being damaged, and the operation of the whole machine can be influenced).

When the shell is designed, the shell is taken as an installation and protection part of the actuator cylinder and a force transmission support part, the shell is designed into an integrated slender structure as much as possible on the premise of meeting the requirements of processing and assembling processes, and the design of the actuator cylinder integrated shell is completed after the factors such as the strength of the shell, the position of the telescopic rod guide limiting groove, the mounting position of the lifting lug, the mounting position of the sensor, the mounting position of the electric connector, the position of the wire passing groove, the mounting space position of the motor and the transmission part and the like are comprehensively considered.

The main working principle is as follows:

supply power and control the stopper through the electric connector, when needs the telescopic link to stretch out (acquiescence worm and screw-nut revolve to being the dextrorotation), supply power for motor 1 forward simultaneously (see motor clockwise rotation from the output shaft end) and supply power for motor 2 backward (see motor anticlockwise rotation from the output shaft end), motor output shaft drives drive bevel gear and rotates (drive bevel gear and motor output shaft butt joint back welding as an organic whole), drive bevel gear drives driven bevel gear and worm and rotates (driven bevel gear and worm butt joint back welding as an organic whole), the worm will rotate and transmit to worm wheel and screw-nut (worm wheel and screw-nut butt joint back welding as an organic whole), screw-nut when rotating, because the effect of spacer pin makes the telescopic link form linear motion (for stretching out the action this moment). When the telescopic rod extends to the right position, the magnetic steel triggers the lower end position sensor, the jumping signal of the position sensor is used for judging the power supply disconnection, the motor stops rotating after the power supply disconnection, and the actuating cylinder completes the extending action.

When the telescopic rod needs to retract, the motor 1 is powered reversely and the motor 2 is powered forwardly, the motor output shaft drives the driving bevel gear to rotate, the driving bevel gear drives the driven bevel gear and the worm to rotate, the worm transmits the rotation to the worm wheel and the screw nut, and when the screw nut rotates, the telescopic rod forms linear motion (retraction motion at the moment) under the action of the limiting pin. When the telescopic rod retracts to the right position, the magnetic steel triggers the upper end position sensor, the jumping signal of the position sensor is used for judging that the power supply is cut off, the motor stops rotating after the power supply is cut off, and the actuating cylinder completes the retracting action.

Because the lead angle of the worm is 3.0175 degrees (less than 3.5 degrees), the worm and gear has a self-locking function, and therefore, in the operation process of the actuating cylinder, as long as the motor is powered off and stops rotating, the telescopic rod can be locked at any position.

Claims (9)

1. A dual redundancy electro-mechanical actuator cylinder comprising a barrel-like integral housing (3), characterized in that: extensible telescopic rods (13) are coaxially arranged in the integrated shell (3), a screw nut (14) is sleeved on each telescopic rod (13) and driven to stretch, and the screw nuts (14) are driven to synchronously engage with the two motors (5) for transmission.

2. The dual redundancy electric drive ram of claim 1, wherein: the screw nut (14) is in meshing transmission by the worm (8), and two ends of the worm (8) are respectively in meshing transmission by the two motors (5); the central axes of the two motors (5) are parallel to each other and are parallel to the integrated shell (3).

3. The dual redundancy electric drive ram of claim 2, wherein: a driving bevel gear (6) is fixed on an output shaft of the motor (5), a driven bevel gear (7) is fixed at the end part of the worm (8), and the driving bevel gear (6) is meshed with the driven bevel gear (7).

4. The dual redundancy electric drive ram of claim 3, wherein: the driving bevel gear (6) is fixed through welding.

5. The dual redundancy electric drive ram of claim 2, wherein: the two motors (5) have opposite rotating directions.

6. The dual redundancy electric drive ram of claim 1, wherein: and position sensors (2) are respectively arranged at the two ends of the integrated shell (3) which are positioned at the telescopic limit of the telescopic rod (13).

7. The dual redundancy electric drive ram of claim 2, wherein: the lead angle of the worm (8) is 2.7-3.2 degrees.

8. The dual redundancy electric drive ram of claim 1, wherein: a limiting pin (19) is arranged at the retracting tail end of the telescopic rod (13) in the integrated shell (3), and the limiting pin (19) enables the telescopic rod (13) to limit and stop rotation.

9. The dual redundancy electric drive ram of claim 2, wherein: the two motors (5) are symmetrically arranged.

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