Large-bending-moment electric steering engine

Abstract

The utility model relates to the technical field of electric steering engines, in particular to a large-bending-moment electric steering engine, which comprises a hollow shell, one end of the shell is connected with a motor, the output end of the motor extends into the shell and is connected with a driving gear, a rotatable ball screw is arranged in the shell, and the ball screw is connected with the driving gear. One end of the ball screw is sleeved with a driven gear meshed with the driving gear, the ball screw is in threaded connection with a nut capable of sliding in a reciprocating mode, an output shaft is arranged on one side of the nut, and an angle sensor is arranged at the bottom end of the output shaft. The arrangement that the ball screw and the nut drive the output shaft to rotate can reduce the volume of the electric steering engine occupying the steering engine cabin section, the structure is more compact, the structure is simple and convenient to replace, the protrusions at the top and the bottom of the nut drive the shifting fork to rotate at the same time, and meanwhile the shifting fork can increase the thickness of the output shaft. Therefore, the output shaft can provide enough power on the occasion of large-angle rapid rotation or large load bearing.

Description

Technical Field

[0001] The utility model relates to the technical field of electric steering gears, in particular to a large bending moment electric steering gear. Background Art

[0002] In the technical field of intelligent ammunition and aircraft such as drones, large-torque electric servos can control the up and down, left and right rotation of the rudder wings, thereby controlling the flight direction and altitude of the aircraft, ensuring the stability and controllability of the aircraft during flight.

[0003] In the design and manufacturing process of aircraft, electric servos are often smaller in size. Small electric servos are more compact in structure and easier to integrate with other systems of the aircraft. Their structure is relatively simple, and maintenance and replacement are more convenient. In the control of the rudder of the UAV, the large bending moment electric servo can ensure that the rudder responds to the control signal quickly and accurately, thereby achieving precise adjustment of the UAV's flight attitude. However, the existing large bending moment electric servos may have the problem of relatively large size and weak bending resistance, which may not meet the needs of aircraft design.

[0004] Therefore, it is necessary to invent a large bending moment electric servo to solve the above problems. Utility Model Content

[0005] In order to address the deficiencies of the prior art, the purpose of the utility model is to provide a large bending moment electric servo, which solves the problem that the existing large bending moment electric servo may have a relatively large size and weak bending resistance in actual use, and may not meet the design requirements of aircraft.

[0006] In order to achieve the above objectives, the utility model adopts the following technical solutions:

[0007] A large bending moment electric steering gear comprises a hollow shell, one end of the shell is connected to a motor, the output end of the motor extends to the inside of the shell, the output end of the motor is connected to a driving gear, a rotatable ball screw is arranged inside the shell, one end of the ball screw is sleeved with a driven gear meshing with the driving gear, the ball screw is threadedly connected to a nut that can slide back and forth, one side of the nut is provided with an output shaft that can rotate with the nut, and the bottom end of the output shaft is provided with an angle sensor.

[0008] As a preferred solution of the utility model, the top and bottom ends of the nut are both provided with cylindrical protrusions, the outer wall of the output shaft is sleeved with a shift fork, and the two protrusions are both inserted into the groove where the shift fork is located.

[0009] As a preferred solution of the utility model, a guide bearing is arranged on one side wall of the nut, and a slide groove for reciprocating sliding of the guide bearing is arranged on the inner side wall of the shell.

[0010] As a preferred solution of the utility model, an adjustment plate is installed at one end of the housing located at the end of the ball screw, an adjustment bolt is connected to the end of the ball screw, and the adjustment plate is provided with a through hole for adjusting the angle of the adjustment bolt.

[0011] As a preferred solution of the utility model, the angle sensor is detachably mounted on the outside of the housing, and the detection end of the angle sensor is connected to the end of the output shaft.

[0012] As a preferred solution of the utility model, a plurality of bearings are arranged on the inner wall of the housing, the bearings are respectively sleeved on both ends of the ball screw, and the bearings are also sleeved on the outer surface of the output shaft.

[0013] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0014] In the utility model, a motor drives a driving gear and a driven gear to rotate, the driven gear drives a ball screw to rotate, the nut slides back and forth under the action of a guide bearing and a slide groove, the protrusions at the top and bottom of the nut drive a shift fork to rotate, the shift fork drives an output shaft to rotate, and an angle sensor at the tail collects the rotation angle. The arrangement of driving the output shaft to rotate by the ball screw and the nut can reduce the volume of the steering gear cabin section occupied by the electric steering gear, making the structure more compact, simple in structure and easy to replace. The protrusions at the top and bottom of the nut simultaneously drive the shift fork to rotate, and the shift fork increases the thickness of the output shaft, so that the output shaft can provide sufficient power when rotating rapidly at a large angle or bearing a large load. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall partial cross-sectional structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the utility model when the shell is removed;

[0017] Figure 3 This is a schematic diagram of the structure of the ball screw of the utility model;

[0018] Figure 4 This is a schematic diagram of the overall structure of the utility model after removing the shell.

[0019] Explanation of the accompanying drawings: 1. Motor; 2. Output shaft; 3. Driving gear; 4. Driven gear; 5. Ball screw; 6. Nut; 7. Adjustment plate; 8. Guide bearing; 9. Slide groove; 10. Housing; 11. Fork; 12. Angle sensor; 13. Protrusion; 14. Adjustment bolt. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and cannot be used to limit the protection scope of the utility model.

[0021] The utility model provides Figure 1-4 A large bending moment electric servo shown in the figure includes an internally hollow shell 10, one end of the shell 10 is connected to a motor 1, the output end of the motor 1 extends to the inside of the shell 10, the output end of the motor 1 is connected to a driving gear 3, a rotatable ball screw 5 is arranged inside the shell 10, one end of the ball screw 5 is sleeved with a driven gear 4 meshing with the driving gear 3, the ball screw 5 is threadedly connected with a nut 6 that can slide back and forth, one side of the nut 6 is provided with an output shaft 2 that can rotate with the nut 6, both ends of the output shaft 2 are fixed by the shell 10, the bottom end of the output shaft 2 is provided with an angle sensor 12, the output shaft 2 is increased in size by the arrangement of a shift fork 11 and a large bearing located on the outer side wall of the output shaft 2, and the bending moment resistance of the output shaft 2 is optimized.

[0022] The top and bottom ends of the nut 6 are both provided with cylindrical protrusions 13, and the outer wall of the output shaft 2 is sleeved with a shift fork 11. The two protrusions 13 are inserted into the groove where the shift fork 11 is located. The protrusions 13 at both ends simultaneously drive the shift fork 11 to rotate, which can provide a greater torque output, thereby ensuring that the rudder surface responds to the control signal quickly and accurately.

[0023] A guide bearing 8 is provided on one side wall of the nut 6, and a slide groove 9 is provided on the inner side wall of the housing 10 for the guide bearing 8 to slide back and forth. The guide bearing 8 and the slide groove 9 are arranged to prevent the nut 6 from rotating with the ball screw 5, so that the nut 6 can slide back and forth along the length direction of the slide groove 9, thereby driving the fork 11 to rotate and realizing the rotation of the output shaft 2.

[0024] An adjusting plate 7 is installed at one end of the housing 10 located at the end of the ball screw 5, and an adjusting bolt 14 is connected to the end of the ball screw 5. The adjusting plate 7 is provided with a through hole for adjusting the angle of the adjusting bolt 14. By rotating the adjusting bolt 14 through the through hole of the adjusting plate 7, the ball screw 5 can be controlled to rotate, thereby manually controlling the deflection angle of the output shaft 2, which is convenient for the debugging and maintenance of the electric servo.

[0025] The angle sensor 12 can be detachably installed on the outside of the housing 10. The detection end of the angle sensor 12 is connected to the end of the output shaft 2. The detection end of the angle sensor 12 is coaxial with the output shaft 2, which can more accurately detect the deflection angle of the output shaft 2 and obtain more accurate data.

[0026] The inner wall of the housing 10 is provided with a plurality of bearings, which are respectively sleeved on both ends of the ball screw 5, and are also sleeved on the outer surface of the output shaft 2. By arranging the bearings on both sides of the ball screw 5 and the outer side of the output shaft 2, the friction force that needs to be overcome for the rotation of the ball screw 5 and the output shaft 2 is reduced, so that the electric servo can respond to the instructions issued by the control end faster and more accurately, thereby improving the execution efficiency of the task. The bearing size located on the outer wall of the output shaft 2 is selected to be a large bearing, thereby improving the ability of large bending moments.

[0027] In the utility model, a motor 1 drives a driving gear 3 and a driven gear 4 to rotate, the driven gear 4 drives a ball screw 5 to rotate, a nut 6 slides back and forth under the action of a guide bearing 8 and a slide groove 9, protrusions 13 at the top and bottom of the nut 6 drive a shift fork 11 to rotate, the shift fork 11 drives an output shaft 2 to rotate, an angle sensor 12 at the tail collects the rotation angle, and the arrangement of driving the output shaft 2 to rotate by the ball screw 5 and the nut 6 can reduce the volume of the steering gear cabin section occupied by the electric steering gear, making the structure more compact, simple in structure and easy to replace, and the protrusions 13 at the top and bottom of the nut 6 simultaneously drive the shift fork 11 to rotate, and at the same time the shift fork 11 increases the thickness of the output shaft 2, so that the output shaft 2 can provide sufficient power when rotating rapidly at a large angle or bearing a large load.

[0028] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A large bending moment electric steering gear, characterized in that: The invention comprises a housing (10) with a hollow interior, one end of the housing (10) being connected to a motor (1), the output end of the motor (1) extending into the interior of the housing (10), the output end of the motor (1) being connected to a driving gear (3), a rotatable ball screw (5) being arranged inside the housing (10), one end of the ball screw (5) being sleeved with a driven gear (4) meshing with the driving gear (3), the ball screw (5) being threadedly connected to a nut (6) capable of reciprocating sliding, an output shaft (2) capable of rotating following the nut (6) being arranged on one side of the nut (6), and an angle sensor (12) being arranged at the bottom end of the output shaft (2).

2. A large bending moment electric steering gear according to claim 1, characterized in that: The top and bottom ends of the nut (6) are both provided with cylindrical protrusions (13), the outer wall of the output shaft (2) is sleeved with a shift fork (11), and the two protrusions (13) are both inserted into the grooves where the shift fork (11) is located.

3. A large bending moment electric steering gear according to claim 2, characterized in that: A guide bearing (8) is disposed on one side wall of the nut (6), and a slide groove (9) for the guide bearing (8) to slide back and forth is provided on the inner side wall of the housing (10).

4. The large bending moment electric steering gear according to claim 1, characterized in that: An adjustment plate (7) is installed at one end of the housing (10) located at the end of the ball screw (5), an adjustment bolt (14) is connected to the end of the ball screw (5), and a through hole for adjusting the angle of the adjustment bolt (14) is provided on the adjustment plate (7).

5. The large bending moment electric steering gear according to claim 1, characterized in that: The angle sensor (12) is detachably mounted on the outside of the housing (10), and a detection end of the angle sensor (12) is connected to the end of the output shaft (2).

6. A large bending moment electric steering gear according to claim 1, characterized in that: The inner wall of the housing (10) is provided with a plurality of bearings, the bearings are respectively sleeved on the two ends of the ball screw (5), and the bearings are also sleeved on the outer surface of the output shaft (2).

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