Long fork type rudder surface driving mechanism

Abstract

The present disclosure relates to a long fork type rudder driving mechanism, comprising: a motor, the motor is fixedly mounted on the housing of the servo, and is coaxially fixedly connected with the motor gear, the motor gear is meshed with the transmission gear, the transmission gear is connected to the lead screw nut anti-rotation structure, the lead screw nut anti-rotation structure comprises a lead screw, the lead screw is meshed with the nut to realize the transmission of the lead screw nut moving up and down, a lever arm structure with a fork is arranged on the lead screw nut anti-rotation structure, the lever arm structure has a first bearing, and under the drive of the nut, the fork drives the rudder to rotate around the rudder shaft through the first bearing. The advantages of the present invention are: simple structure, the size of the structure can be adjusted according to the use to adapt to the use of different types of servos, low cost and wide application range.

Description

Technical Field

[0001] The invention relates to a long fork type rudder surface driving mechanism. Background Art

[0002] Guided weapons are space flight weapons composed of electronic equipment cabins, engines, control systems and remote sensing systems. During the flight of guided weapons, computers need to issue different instructions to control the rudder surface to rotate around the rudder shaft, generate control force and torque, meet different flight attitude angles, and allow the missile to fly along the predetermined target trajectory. Among them, the driving torque and the resistance torque generated by the servo during flight are factors that need to be specially considered in the design process. During the design process, due to factors such as the space limitations of the servo, it is often necessary to reasonably optimize the control torque of the rudder surface. At the same time, the screw nut anti-rotation structure must be reasonably designed to achieve transmission function and efficiency. The existing technology has a short lever arm, which results in greater force on the motor and the screw, and finally leads to defects such as low transmission efficiency and weak load-bearing capacity. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a long fork type rudder surface driving mechanism, which has a simple structure and high reliability.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a long fork type rudder surface driving mechanism, characterized in that it includes: a motor, the motor is fixedly installed on the housing of the servo engine, and is coaxially fixedly connected with the motor gear, the motor gear is meshed with the transmission gear, the transmission gear is connected to the lead screw nut anti-rotation structure, the lead screw nut anti-rotation structure includes a lead screw, the lead screw is meshed with the nut to realize the transmission of the up and down movement of the lead screw nut, a lever arm structure with a shift fork is arranged on the lead screw nut anti-rotation structure, the lever arm structure has a first bearing, and under the drive of the nut, the shift fork drives the rudder surface to rotate around the rudder shaft through the first bearing.

[0005] Compared with the prior art, the present invention has the following beneficial technical effects:

[0006] The structure is simple, comprising: a motor, the motor is fixedly mounted on the housing of the servo, and is coaxially fixedly connected with the motor gear, the motor gear is meshed with the transmission gear, the transmission gear is connected to the lead screw nut anti-rotation structure, a force arm structure with a shift fork is arranged on the lead screw nut anti-rotation structure, the size of the structure can be adjusted according to use to adapt to the use of different models of servos, the cost is low, and the application range is wide. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a schematic diagram of the structure of the driving mechanism system of the long fork type rudder surface driving mechanism of the present invention;

[0008] Figure 2It is a schematic diagram of the arm structure of the long fork type rudder surface driving mechanism of the present invention;

[0009] Figure 3 The invention discloses a schematic diagram of a screw nut anti-rotation structure of a long fork type rudder surface driving mechanism.

[0010] Reference numerals

[0011] 1 - motor, 2 - motor gear, 3 - transmission gear, 4 - lead screw gear,

[0012] 5 - screw bearing, 6 - screw, 7 - nut, 8 - fork,

[0013] 9——first bearing, 10——second bearing,

[0014] 11——Stop plate, 12——Third bearing DETAILED DESCRIPTION

[0015] The present invention is further described in detail below through specific implementation examples, but these implementation examples are only for illustration and do not limit the scope of the present invention.

[0016] Please refer to Figures 1 to 3 The long fork type rudder surface driving mechanism of the present invention comprises: a motor 1, wherein the motor 1 is fixedly mounted on the housing of the servo engine and is coaxially fixedly connected with the motor gear 2, the motor gear 2 is meshed with the transmission gear 3, the transmission gear 3 is connected with the lead screw nut anti-rotation structure, the lead screw nut anti-rotation structure comprises a lead screw 6, the lead screw 6 is meshed with the nut 7 to realize the transmission of the up and down movement of the lead screw nut, a force arm structure with a shift fork 8 is arranged on the lead screw nut anti-rotation structure, the force arm structure has a first bearing 9, and under the drive of the nut 7, the shift fork 8 drives the rudder surface to rotate around the rudder shaft through the first bearing 9.

[0017] In one embodiment, the screw nut anti-rotation structure further includes: a screw gear 4 and a anti-rotation plate 11 with a bearing slide groove structure, the transmission gear 3 drives the screw gear 4 to rotate, and the screw gear 4 is fixedly connected to the screw 6.

[0018] In one embodiment, the anti-rotation plate 11 of the bearing sliding groove structure includes: a second bearing 10 and a sliding groove arranged on the anti-rotation plate 11, and the second bearing 10 moves up and down along the sliding groove of the anti-rotation plate 11.

[0019] In one embodiment, the anti-rotation plate 11 is fixedly installed inside the steering gear housing.

[0020] In one embodiment, the screw 6 is installed inside the housing of the steering gear through a screw bearing 5 .

[0021] In one embodiment, the nut 7 is disposed in the middle of the lead screw 6 .

[0022] In one embodiment, a third bearing 12 for reducing friction and wear is provided at a position on the nut 7 relative to the second bearing 10 .

[0023] In one embodiment, the third bearing 12 is connected to the shift fork 8 .

[0024] In one embodiment, the long fork type rudder driving mechanism specifically comprises: a motor 1, a motor gear 2, a transmission gear 3, a lead screw gear 4, a lead screw bearing 5, a lead screw 6, a nut 7, a shift fork 8, a first bearing 9, a second bearing 10, a stop plate 11, a third bearing 12 and other components. The motor 1 is fixedly mounted on the housing of the servo, and is coaxially fixedly connected with the motor gear 2. The motor gear 2 is meshed with the transmission gear 3. The transmission gear 3 drives the lead screw gear 4 to rotate. The gear 4 is fixedly connected with the lead screw 6. The lead screw 6 is installed inside the housing of the servo through the lead screw bearing 5. The lead screw 6 is meshed with the nut 7. Under the drive of the nut 7, the shift fork 8 drives the rudder to rotate around the rudder shaft through the first bearing 9 to achieve an ideal flight attitude angle of the rudder.

[0025] As a specific embodiment, the screw nut anti-rotation structure of the present invention is as follows Figure 3 As shown, the entire structure is mainly composed of: screw 6, nut 7, second bearing 10, anti-rotation plate 11, and third bearing 12. When the fork 8 drives the nut 7 to move through the second bearing 12, the nut 7 will generate an axial rotation force, and the up and down movement cannot be formed. By designing the second bearing 10 and the anti-rotation plate 11, the anti-rotation plate 11 is fixedly installed inside the steering gear housing, and the second bearing 10 can move up and down along the groove of the anti-rotation plate 11, thereby effectively limiting the rotation of the screw nut 7, so that the entire device has good transmission performance. At the same time, the design of the third bearing 12 reduces friction and wear, and greatly improves the transmission accuracy and reliability.

[0026] As a specific embodiment, when the lead screw 6 drives the nut 7 to move axially, it will generate an upward or downward driving force F1 on the fork, and the fork drives the rudder surface to rotate around the axis of the first bearing 9. The first bearing 9 is installed on the steering gear housing, and the length of the driving force arm is L1; and the steering gear will be affected by the wind resistance and other resistance F2 during the flight, so that when the rudder surface rotates around the axis of the first bearing 9, the equivalent resistance arm generated is L2; ​​according to the force balance law F1×L1=F2×L2, when the designed driving force arm L1 is larger, the driving control force F1 will be reduced, and the load of the entire steering gear will be reduced, the rudder surface can be quickly manipulated, and the transmission error caused by the mechanical structure will be reduced, and the control accuracy of the rudder surface angle will be increased, so as to achieve the purpose of precise guidance. At the same time, the friction and wear of the entire device are reduced and the service life is extended.

[0027] The present invention achieves the following beneficial technical effects:

[0028] First, the structure is simple, including: a motor, the motor is fixedly mounted on the housing of the servo, and is coaxially fixedly connected with the motor gear, the motor gear is meshed with the transmission gear, the transmission gear is connected to the lead screw nut anti-rotation structure, and a force arm structure with a shift fork is arranged on the lead screw nut anti-rotation structure, and the size of the structure can be adjusted according to use to adapt to the use of different models of servos, with low cost and wide application range.

[0029] Secondly, the arm structure design of the long shift fork of the present invention reduces the load of the entire steering gear, can quickly and sensitively manipulate the angle of the rudder surface, and can also reduce the transmission error caused by the mechanical structure, increase the control accuracy of the rudder surface angle, achieve the purpose of precise guidance, and at the same time, reduce the friction and wear of the entire device and extend its service life.

[0030] Third, the bearing slide groove anti-rotation structure design enables the entire device to have good transmission performance, forming a transmission effect of the screw nut moving up and down. At the same time, the bearing slide groove anti-rotation structure design reduces friction and wear, greatly improving transmission accuracy and reliability.

[0031] Fourth, the motor inputs power into the entire servo mechanism through the intermediate transmission gear. It has a large reduction ratio, smooth and reliable transmission, and can be used on the same type of servos.

[0032] Although the present invention has selected the preferred embodiments disclosed above, it is not intended to limit the present invention. Obviously, it is not necessary and impossible to list all implementation methods here. Any researcher in this field can use the design methods and contents in the above disclosed embodiments to change and modify the research scheme of the present invention without departing from the spirit and scope of the present invention. Therefore, any simple modification, parameter change and modification made to the above embodiments based on the research essence of the present invention without departing from the content of the present invention, all belong to the protection scope of the present invention.

Claims

1. A long fork type rudder surface driving mechanism, characterized in that: include: A motor (1), wherein the motor (1) is fixedly mounted on a housing of a steering gear and is coaxially fixedly connected to a motor gear (2), wherein the motor gear (2) is meshed with a transmission gear (3), wherein the transmission gear (3) is connected to a lead screw nut anti-rotation structure, wherein the lead screw nut anti-rotation structure comprises a lead screw (6), wherein the lead screw (6) is meshed with a nut (7) to achieve transmission of the lead screw nut moving up and down, wherein a lever structure having a shift fork (8) is arranged on the lead screw nut anti-rotation structure, wherein the lever structure has a first bearing (9), and under the drive of the nut (7), the shift fork (8) drives the rudder surface to rotate around the rudder shaft via the first bearing (9); The screw nut anti-rotation structure further comprises: a screw gear (4) and an anti-rotation plate (11) having a bearing slide groove structure, the transmission gear (3) drives the screw gear (4) to rotate, and the screw gear (4) is fixedly connected to the screw (6); The anti-rotation plate (11) of the bearing sliding groove structure comprises: a second bearing (10) and a sliding groove arranged on the anti-rotation plate (11), wherein the second bearing (10) moves up and down along the sliding groove of the anti-rotation plate (11); When the lead screw (6) drives the nut (7) to move axially, the first bearing (9) is mounted on the steering gear housing, and the length of the driving force arm is L1; by increasing the driving force arm L1, the load of the entire steering gear and the transmission error caused by mechanical structure reasons can be reduced, and the purpose of precise guidance and extended service life can be achieved; A third bearing (12) for reducing friction and wear is arranged at a position on the nut (7) relative to the second bearing (10).

2. The long fork type rudder surface driving mechanism according to claim 1, characterized in that: The anti-rotation plate (11) is fixedly installed inside the steering gear housing.

3. The long fork type rudder surface driving mechanism according to claim 1, characterized in that: The lead screw (6) is installed inside the housing of the steering gear via a lead screw bearing (5).

4. The long fork type rudder surface driving mechanism according to claim 3, characterized in that: The nut (7) is arranged at the middle part of the lead screw (6).

5. The long fork type rudder surface driving mechanism according to claim 1, characterized in that: The third bearing (12) is connected to the shift fork (8).

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