阅读说明：本技术 一种大行程电动舵机执行机构 (Large-stroke electric steering engine actuating mechanism ) 是由 陈永红 任宏喜 王竟 张康军 刘念 于 2021-10-21 设计创作，主要内容包括：本发明公开一种大行程电动舵机执行机构,涉及导弹舵机控制技术领域,以解决传统控制装置为微动开关等机械装置,容易损坏微动开关,可靠性较差的技术问题。包括：壳体、驱动装置、丝杠螺杆、丝杠螺母、关节轴承以及拨叉；丝杠螺杆的两端转动式安装在壳体内,驱动装置的输出端与丝杠螺杆的输入端传动连接,丝杠螺母螺纹式安装在丝杠螺杆上,关节轴承安装在丝杠螺母的两侧,拨叉的一端与关节轴承过盈配合,其另一端与舵面传动连接,驱动装置驱动丝杠螺杆转动,丝杠螺母通过关节轴承带动拨叉沿丝杠螺杆长度方向运动。上述舵机执行机构采用一体化结构设计,传动精确度高,容易加工装配,维护性强,降低了舵面系统的制造和维护成本,具有很高的实用性。(The invention discloses a large-stroke electric steering engine actuating mechanism, relates to the technical field of missile steering engine control, and aims to solve the technical problems that a traditional control device is a mechanical device such as a microswitch and the like, the microswitch is easily damaged, and the reliability is poor. The method comprises the following steps: the device comprises a shell, a driving device, a screw rod and a screw nut, a joint bearing and a shifting fork; the two ends of the screw rod are rotatably mounted in the shell, the output end of the driving device is in transmission connection with the input end of the screw rod, the screw nut is in threaded mounting on the screw rod, the knuckle bearings are mounted on two sides of the screw nut, one end of the shifting fork is in interference fit with the knuckle bearings, the other end of the shifting fork is in transmission connection with the control surface, the driving device drives the screw rod to rotate, and the screw nut drives the shifting fork to move along the length direction of the screw rod through the knuckle bearings. The steering engine actuating mechanism adopts an integrated structure design, has high transmission accuracy, easy processing and assembly and strong maintainability, reduces the manufacturing and maintenance cost of a control surface system, and has very high practicability.)

1. The utility model provides a large stroke electric steering engine actuating mechanism which characterized in that includes: the device comprises a shell, a driving device, a screw rod and a screw nut, a joint bearing and a shifting fork;

the both ends rotary type of screw rod is installed in the casing, drive arrangement's output with screw rod's input transmission is connected, screw nut screw thread formula is installed on screw rod, joint bearing installs screw nut's both sides, the one end of shift fork with joint bearing interference fit, its other end and control surface transmission are connected, drive arrangement drive screw rod rotates, screw nut passes through joint bearing drives the shift fork is followed screw rod length direction moves.

2. The large-stroke electric steering engine actuating mechanism according to claim 1, wherein the driving device comprises a driving motor and a transmission gear set;

the driving motor is installed in the shell and is respectively positioned on two sides of the screw rod, and the output end of the driving motor is in transmission connection with the input end of the screw rod through the transmission gear set.

3. The large-stroke electric steering engine actuating mechanism according to claim 2, wherein the transmission gear set comprises a motor gear, a transmission gear and a screw gear;

the motor gear with driving motor's output fixed connection, the lead screw gear with the input fixed connection of lead screw rod, the transmission gear rotary type is installed in the casing, be located the motor gear with between the lead screw gear, and with the motor gear with the lead screw gear meshes mutually.

4. The large-stroke electric steering engine actuator of claim 1, further comprising a lead screw bearing;

the screw rod bearing is fixedly arranged at the position of the screw rod, which is close to the two ends, and the screw rod is rotatably arranged in the shell through the screw rod bearing.

5. The large-stroke electric steering engine actuator of claim 1, wherein the housing comprises a lower shell and an upper cover;

the screw rod, the screw nut, the joint bearing and the shifting fork are all installed in the lower shell, the upper cover is installed on the lower shell, and the screw rod, the screw nut, the joint bearing and the shifting fork are sealed in the lower shell.

6. The large-stroke electric steering engine actuating mechanism according to claim 5, wherein the middle of the lower shell is a rectangular cavity, the screw nut and the screw rod are located in the rectangular cavity, one side of the lower shell facing the shifting fork is a fan-shaped cavity, and the shifting fork is driven by the screw nut to swing up and down in the fan-shaped cavity.

7. The large-stroke electric steering engine actuator according to claim 5, wherein the shift fork comprises a mounting member and a shift plate;

the installed part is U type structure, the both sides edge of installed part is provided with the mounting groove, the installed part passes through the mounting groove with joint bearing interference fit, the plectrum is installed the installed part is kept away from one side of mounting groove.

8. The large-stroke electric steering engine actuator of claim 7, wherein two sides of the mounting member face the lower housing and the upper cover, respectively.

9. The large-stroke electric steering engine actuator of claim 7, wherein the plectrum is fixedly connected with the side edge of one side of the mounting piece facing the upper cover.

10. The large-stroke electric steering engine actuating mechanism according to claim 7, wherein a mounting hole perpendicular to the screw rod of the screw rod is formed in one side of the shifting piece, which is far away from the mounting piece, a driving bearing is mounted in the mounting hole, and the shifting fork is connected with the control surface through the driving bearing.

Technical Field

The invention relates to the technical field of missile steering engine control, in particular to a large-stroke electric steering engine actuating mechanism.

Background

The steering engine system belongs to a typical servo system, is applied to an aircraft guidance control system, and controls the rotation angle of a control surface through the power input of a driving motor and a speed reduction and force amplification mechanism, so that the flight attitude of the whole weapon system is controlled, and the aim of accurate guidance is finally achieved. With the innovation of a new technology, the steering engine develops towards high precision, high speed and miniaturization, so that the space occupied by the actuating mechanism is smaller and smaller, and higher requirements are provided for important indexes such as transmission precision, stroke, quality, volume and the like of the transmission mechanism. The traditional control device is a mechanical device such as a microswitch and the like, the mechanical device needs to strictly control the stroke and the working pressure according to requirements, otherwise, the microswitch is easily damaged, and the reliability is poor. The transmission actuating mechanism which has large stroke and small volume and reasonably utilizes the limited space in the missile guiding cabin body is urgently needed to be developed to solve the defects and shortcomings of the prior art.

Disclosure of Invention

The invention aims to provide a large-stroke electric steering engine actuating mechanism which is small in size, can be suitable for a limited space in a missile cabin body and is large in stroke, and the problems that a traditional microswitch is strict in use condition, easy to damage and poor in reliability are solved.

In order to achieve the above purpose, the invention provides the following technical scheme:

the utility model provides a large stroke electric steering engine actuating mechanism, includes: the device comprises a shell, a driving device, a screw rod and a screw nut, a joint bearing and a shifting fork;

the both ends rotary type of screw rod is installed in the casing, drive arrangement's output with screw rod's input transmission is connected, screw nut screw thread formula is installed on screw rod, joint bearing installs screw nut's both sides, the one end of shift fork with joint bearing interference fit, its other end and control surface transmission are connected, drive arrangement drive screw rod rotates, screw nut passes through joint bearing drives the shift fork is followed screw rod length direction moves.

The screw nut of the large-stroke electric steering engine actuating mechanism provided by the invention is arranged on the screw rod, the driving device drives the screw rod to rotate, the screw rod nut can reciprocate along the length direction of the screw rod under the driving of the screw rod, and the shifting fork is arranged in interference fit with the joint bearing on the screw rod nut, so that the shifting fork can be driven to simultaneously move when the screw rod nut moves along the screw rod, the accurate control of the steering surface turning angle is realized, in addition, the limiting devices for the screw rod nut are not arranged at the two ends of the screw rod, the maximum effective stroke of the screw rod is ensured, the large-range turning angle adjustment of the steering surface is realized, and when the screw rod nut moves to the limiting position, the shifting fork can be contacted with the excircle of the screw rod bearing at the two ends of the screw rod, and the instantaneous locking of the actuating mechanism is avoided. The large-stroke electric steering engine actuating mechanism is simple in structure, high in transmission accuracy, easy to machine and assemble and strong in maintainability, adopts an integrated structural design, reduces the manufacturing and maintenance cost of a control surface system, and has high practicability.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic diagram of an internal structure of an actuator of a large-stroke electric steering engine in the embodiment of the invention;

FIG. 2 is a diagram of the internal transmission structure of the actuator of the large-stroke electric steering engine in FIG. 1;

fig. 3 is a schematic view of the combination of the fork, the lead screw and the lead screw nut shown in fig. 1.

Reference numerals:

the device comprises a shell 1, a shifting fork 2, a screw rod 3, a screw rod gear 4, a joint bearing 5, a transmission gear 6, a motor gear 7, a driving motor 8, a screw rod nut 9 and a screw rod bearing 10.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. The meaning of "a number" is one or more unless specifically limited otherwise.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

As shown in fig. 1 to 3, the large-stroke electric steering engine actuating mechanism provided by the invention comprises a shell 1, a driving device, a screw rod and screw rod 3, a screw rod nut 9, a joint bearing 5 and a shifting fork 2; the two ends of the screw rod 3 are rotatably mounted in the shell 1, the output end of the driving device is in transmission connection with the input end of the screw rod 3, the screw nut 9 is in threaded mounting on the screw rod 3, the knuckle bearings 5 are mounted on two sides of the screw nut 9, one end of the shifting fork 2 is in interference fit with the knuckle bearings 5, the other end of the shifting fork is in transmission connection with the control surface, the driving device drives the screw rod 3 to rotate, and the screw nut 9 drives the shifting fork 2 to move along the length direction of the screw rod 3 through the knuckle bearings 5.

In the specific implementation:

the driving motor 8 drives the shifting fork 2 to move up and down through the transmission of the gear and the screw nut 9, and any nut limiting device is not arranged at the two ends of the screw rod 3, so that the maximum effective action stroke of the screw rod 3 is ensured. And the structure of the shifting fork 2 is reasonably optimized, when the screw nut 9 moves to the limit position, the shifting fork 2 is contacted with the outer circles of the screw bearings 10 at the two ends of the screw bearings 10, so that the mechanism is prevented from being instantaneously locked, the damage to the shifting fork 2 and the screw nut 9 is avoided, and the service life of the large-stroke electric steering engine executing mechanism is prolonged.

The screw nut of the large-stroke electric steering engine actuating mechanism provided by the invention is arranged on the screw rod, the driving device drives the screw rod to rotate, the screw rod nut can reciprocate along the length direction of the screw rod under the driving of the screw rod, and the shifting fork is arranged in interference fit with the joint bearing on the screw rod nut, so that the shifting fork can be driven to simultaneously move when the screw rod nut moves along the screw rod, the accurate control of the steering surface turning angle is realized, in addition, the limiting devices for the screw rod nut are not arranged at the two ends of the screw rod, the maximum effective stroke of the screw rod is ensured, the large-range turning angle adjustment of the steering surface is realized, and when the screw rod nut moves to the limiting position, the shifting fork can be contacted with the excircle of the screw rod bearing at the two ends of the screw rod, and the instantaneous locking of the actuating mechanism is avoided. The large-stroke electric steering engine actuating mechanism is simple in structure, high in transmission accuracy, easy to machine and assemble and strong in maintainability, adopts an integrated structural design, reduces the manufacturing and maintenance cost of a control surface system, and has high practicability.

As an implementation, the driving device comprises a driving motor 8 and a transmission gear set; the driving motor 8 is installed in the shell 1 and is respectively positioned at two sides of the screw rod 3 with the shifting fork 2, and the output end of the driving motor 8 is in transmission connection with the input end of the screw rod 3 through the transmission gear set.

Through the transmission form of the transmission gear set, the power transmission of the driving motor 8 is more direct and more stable. The driving motor 8 and the shifting fork 2 are respectively positioned on two sides of the screw rod 3, so that the space layout in the shell 1 of the stroke electric steering engine actuating mechanism is more reasonable, the volume of the steering engine actuating mechanism is reduced to a certain extent, and the compactness of the steering engine actuating mechanism is improved. Furthermore, in order to improve the power output effect of the steering engine executing mechanism, the transmission gear set can adopt a form of combining multiple gears, so that the output torque of the steering engine executing mechanism is improved while the output is stable.

As an embodiment, the transmission gear set includes a motor gear 7, a transmission gear 6, and a screw gear 4; the output end of the motor gear 7 is fixedly connected with the output end of the driving motor 8, the lead screw gear 4 is fixedly connected with the input end of the lead screw 3, and the transmission gear 6 is rotatably installed in the shell 1 and positioned between the motor gear 7 and the lead screw gear 4 and is meshed with the motor gear 7 and the lead screw gear 4.

The motor gear 7, the transmission gear 6 and the screw rod gear 4 adopt a three-level gear transmission mode, so that the output torque of the driving motor 8 is effectively improved, and the power output is more stable. The motor gear 7, the transmission gear 6 and the screw rod gear 4 are all assembled, and the assembly is simpler and more convenient.

As an embodiment, the actuator further comprises a screw bearing 10; the screw bearing 10 is fixedly installed at the position of the screw rod 3 close to the two ends, and the screw rod 3 is rotatably installed in the shell 1 through the screw bearing 10.

The screw bearings 10 are fixedly installed at two ends of the screw rod 3, are installed in the shell 1 in an assembling mode, are more simple and convenient to assemble and are easier to process. Meanwhile, the form of mounting the lead screw bearing 10 is adopted, so that the resistance of the lead screw bearing 10 in the rotating process is reduced, and the stability and the effectiveness of the power output of the driving motor 8 are ensured.

As an embodiment, the housing 1 includes a lower case and an upper cover; the screw rod 3, the screw nut 9, the joint bearing 5 and the shifting fork 2 are all installed in the lower shell, the upper cover is installed on the lower shell, and the screw rod 3, the screw nut 9, the joint bearing 5 and the shifting fork 2 are sealed in the lower shell.

Adopt the form of inferior valve and upper cover aggregate erection, can be effectual be an overall structure with the combination of steering wheel actuating mechanism, overall structure nature is stronger, aggregate erection's form, and installation simple and convenient more is easily processed and is maintained, simultaneously, has also reduced the cost of making and using.

As an implementable mode, the middle of the lower shell is a rectangular cavity, the screw nut 9 and the screw rod 3 are located in the rectangular cavity, one side of the lower shell, facing the shifting fork 2, is a fan-shaped cavity, and the shifting fork 2 is driven by the screw nut 9 to swing up and down in the fan-shaped cavity.

The setting of rectangle cavity provides sufficient space for lead screw 3 and lead screw nut 9's installation, has made things convenient for lead screw nut 9 along the up-and-down motion of lead screw 3, and the setting of fan-shaped cavity provides sufficient space for the motion of shift fork 2, and the orbit of shift fork 2 of laminating more has effectually reduced steering wheel actuating mechanism's volume for steering wheel actuating mechanism structure nature is stronger.

As an embodiment, the shift fork 2 includes a mounting member and a shift plate; the installed part is U type structure, and the both sides edge of installed part is provided with the mounting groove, and the installed part passes through mounting groove and 5 interference fit of joint bearing, and the plectrum is installed in the one side that the installation groove was kept away from to the installed part.

The installed part of U type structure can be better with 5 aggregate erection of joint bearing, adopt interference fit's form for shift fork 2 and 5 combination convenience more of joint bearing, both ensured the drive to shift fork 2, guaranteed again that screw nut 9 is when moving 3 both ends of lead screw, shift fork 2 and 10 excircle contacts of screw bearing, avoided steering wheel supporting mechanism's instantaneous card to die, reduced the damage to steering wheel actuating mechanism, steering wheel actuating mechanism's life has been prolonged.

As an embodiment, both side edges of the mounting member face in the direction of the lower case and the upper cover, respectively. Furthermore, the plectrum and the side fixed connection of installed part orientation upper cover one side.

The both sides limit of installed part is towards inferior valve and upper cover direction, can be better with 5 interference composite installations of joint bearing of installation on the 9 both sides of lead screw nut, the narrow and small space of 1 inner chamber of adaptation casing that also can be better, simultaneously, can also be better with the power of 5 departments of joint bearing, transmit the control plane through shift fork 2, drive the control plane and rotate or swing. And the plectrum and the side fixed connection of installed part orientation upper cover one side, the fan-shaped cavity of adaptation that can be better reduces the occupation to 1 inner space of casing, and then reduces steering wheel actuating mechanism's volume.

As an implementation mode, a mounting hole perpendicular to the screw rod 3 is formed in one side, away from the mounting piece, of the shifting piece, a driving bearing is mounted in the mounting hole, and the shifting fork 2 is connected with the control surface through the driving bearing.

The arrangement of the mounting hole on the shifting fork 2 facilitates the mounting of the driving bearing and the combined mounting with the control surface, the adopted driving bearing reduces the resistance of the shifting fork 2 in the process of driving the control surface to move, and the power transmission effect is improved. The opening direction of the mounting hole is perpendicular to the extending direction of the screw bearing 10, so that the whole structure of the steering engine actuating mechanism is more stable, the components are easier to assemble, and the steering engine actuating mechanism is more convenient to produce, install and maintain.

In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.