CN111474662A - High-rigidity horizontal focusing mechanism with compact structure - Google Patents

Abstract

The invention discloses a high-rigidity horizontal focusing mechanism with a compact structure, comprising a flexible main base, the flexible main base has an upper rigid mounting substrate, a lower rigid mounting substrate and a flexible assembly; the motor output shaft of the motor assembly is connected to There is a lead screw shaft; the flexible component is divided into a first flexible component and a second flexible component, and the second flexible component is equipped with a nut, a motor component and a lead screw axis; the motor component drives the lead screw axis to rotate, and through its thread The connected nut and the flexible deformation of the flexible assembly adjust the relative distance between the upper rigid mounting substrate and the lower rigid mounting substrate to achieve focus adjustment of the optical element along the axial direction of the flexible main base. The horizontal focusing mechanism of the present invention adopts the traditional rotating pair of the flexible hinge belt body, which simplifies the structure and eliminates the movement gap. Therefore, the focusing mechanism has the advantages of compact structure, small volume and high movement precision.

Description

A compact high-rigidity horizontal focusing mechanism

technical field

The invention relates to the technical field of space loads, in particular to a compact and high-rigidity horizontal focusing mechanism.

Background technique

Because the application environment of the space optical system is very harsh, and the factors affecting the optical system are complex, such as changes in ambient temperature, changes in atmospheric pressure, system vibration, and the impact of external shocks, all of which will cause the focal plane of the optical system to produce A certain degree of axial offset, which adversely affects the imaging quality of the optical system. In order to ensure the imaging quality of the optical system, it is necessary to adjust the axial position of the corresponding optical components in the optical system, so as to reversely correct the defocus amount of the focal plane of the optical system. At this time, a focusing mechanism is required.

For microsatellites, the overall weight requirements are very strict, which limits the application of large-scale, high-rigidity focusing mechanisms, while the structural rigidity of small-volume focusing mechanisms cannot meet the needs of use.

SUMMARY OF THE INVENTION

The purpose of the present invention is to solve the conflicting problem of the volume, rigidity, weight and integration of the focusing mechanism of small satellites in the prior art, and to provide a focusing mechanism with small size, light weight and high rigidity.

In order to achieve the above object, the present invention provides the following technical solutions:

A compact high-rigidity horizontal focusing mechanism of the present invention includes:

a flexible main base, the upper end of the flexible main base is used to install optical components;

the flexible main base has an upper rigid mounting substrate at the upper end, a lower rigid mounting substrate at the lower end, and flexible components arranged along the circumference of the flexible main base;

The flexible components are divided into first flexible components symmetrically arranged along the first direction of the flexible main base, and second flexible components symmetrically arranged along the second direction of the flexible main base;

A motor adapter is installed in the second flexible component of the flexible main base;

The motor adapter is embedded with a motor assembly;

The motor output shaft of the motor assembly is drivingly connected with a screw shaft;

A nut is fixedly connected to one side of the second flexible component relative to the motor component;

One end of the screw shaft away from the motor output shaft extends to the nut and is threadedly connected with the nut;

The motor assembly drives the screw shaft to rotate, and adjusts the relative distance between the upper rigid mounting substrate and the lower rigid mounting substrate through a nut threadedly connected thereto and the flexible deformation of the first flexible assembly and the second flexible assembly to The focusing of the optical element along the axial direction of the flexible main base is realized.

Further, the first flexible assembly includes a first steel arm connected to the upper rigid mounting substrate through a first flexible hinge, and a second steel arm connected to the lower rigid mounting substrate through a third flexible hinge;

The first steel arm and the second steel arm are connected by a second flexible hinge.

Further, the second flexible assembly includes a third steel arm connected to the upper rigid mounting substrate through a fourth flexible hinge, and a fourth steel arm connected to the lower rigid mounting substrate through a seventh flexible hinge;

A motor mounting substrate is connected between the third steel arm and the fourth steel arm close to the left side of the flexible main base through a fifth flexible hinge and a sixth flexible hinge, respectively;

A nut mounting substrate is connected between the third steel arm and the fourth steel arm close to the right side of the flexible main base through a fifth flexible hinge and a sixth flexible hinge, respectively;

The motor adapter is assembled on the motor mounting substrate and extends toward the interior of the flexible main base;

The nut is assembled to the nut mounting substrate.

Further, the motor adapter seat is fixedly connected to the motor mounting substrate through a motor adapter seat flange formed at an end thereof;

The motor assembly is embedded in the motor adapter seat, and is assembled and fixed with the blind hole inside the motor adapter seat.

Further, a locking nut is fixedly connected to one end of the screw shaft and the motor output shaft of the motor assembly;

A bearing cover is fixedly connected to one end of the motor output shaft of the motor adapter;

A bearing inserting cavity is formed inside the bearing cover, and a bearing rotatably connected with the screw shaft is installed in the bearing inserting cavity.

Further, one end of the nut is embedded in the nut installation base plate, and the other end of the nut is formed as a nut flange body fixedly connected with the side surface of the nut installation base plate.

Further, the rigidity of the first flexible hinge, the second flexible hinge, the third flexible hinge, the fourth flexible hinge, the fifth flexible hinge, the sixth flexible hinge, and the seventh flexible hinge is smaller than that of the upper rigid mounting substrate, the lower The rigidity of the rigid mounting base plate, the first steel arm, the second steel arm, the third steel arm, the fourth steel arm, the motor mounting base plate and the nut mounting base plate.

Further, the first steel arm and the second steel arm have hollow structures to form lightweight structures.

In the above technical solution, the present invention provides a compact high-rigidity horizontal focusing mechanism, which has the following beneficial effects:

The vertical focusing mechanism of the present invention adopts the traditional rotating pair of the flexible hinge belt body, which simplifies the structure and eliminates the movement gap. Therefore, the focusing mechanism has the advantages of compact structure, small volume and high movement precision.

The flexible components on the side of the flexible main base of the present invention work independently, so the processing and assembly accuracy of the parts is not high, and the structural rigidity is improved by the multiple sets of flexible components distributed symmetrically along the axis, so the focusing mechanism has high rigidity, The first-order mode is high.

Description of drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only described in the present invention. For some of the embodiments, those of ordinary skill in the art can also obtain other drawings according to these drawings.

1 is a schematic structural diagram of a compact high-rigidity horizontal focusing mechanism provided by an embodiment of the present invention;

2 is a schematic structural diagram of a second flexible component of a compact high-rigidity horizontal focusing mechanism provided by an embodiment of the present invention;

3 is a cross-sectional view of a second flexible component of a compact high-rigidity horizontal focusing mechanism provided by an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a first flexible component of a compact high-rigidity horizontal focusing mechanism provided by an embodiment of the present invention.

Description of reference numbers:

1. Flexible main base; 2. First flexible assembly; 3. Second flexible assembly; 4. Screw shaft; 5. Motor adapter; 6. Nut; 7. Motor assembly;

101. The upper rigid mounting substrate; 102, the lower rigid mounting substrate;

201, the first flexible hinge; 202, the second flexible hinge; 203, the third flexible hinge; 204, the first steel arm; 205, the second steel arm;

301, the fourth flexible hinge; 302, the fifth flexible hinge; 303, the sixth flexible hinge; 304, the seventh flexible hinge; 305, the third steel arm; 306, the fourth steel arm; 307, the motor mounting substrate; 308, Nut mounting base plate;

501. Motor adapter flange;

601. Nut flange body;

701, lock nut; 702, bearing cover; 703, bearing.

Detailed ways

In order to make those skilled in the art better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

See Figure 1 to Figure 4;

A compact high-rigidity horizontal focusing mechanism of the present invention includes:

A flexible main base 1, the upper end of the flexible main base 1 is used to install optical components;

The flexible main base 1 has an upper rigid mounting substrate 101 at the upper end, a lower rigid mounting substrate 102 at the lower end, and flexible components arranged along the circumference of the flexible main base 1;

The flexible components are divided into first flexible components 2 symmetrically arranged along the first direction of the flexible main base 1, and second flexible components 3 symmetrically arranged along the second direction of the flexible main base 1;

A motor adapter 5 is installed in the second flexible component 3 of the flexible main base 1;

The motor adapter 5 is embedded with a motor assembly 7;

The motor output shaft of the motor assembly 7 is drivingly connected with the screw shaft 4;

The second flexible component 3 is fixedly connected with a nut 6 on one side relative to the motor component 7;

One end of the screw shaft 4 away from the motor output shaft extends to the nut 6 and is threadedly connected with the nut 6;

The motor assembly 7 drives the screw shaft 4 to rotate, and adjusts the relative distance between the upper rigid mounting substrate 101 and the lower rigid mounting substrate 102 through the nut 6 screwed thereto and the flexible deformation of the first flexible assembly 2 and the second flexible assembly 3 to achieve The optical element is adjusted along the axial direction of the flexible main base 1 .

Specifically, this embodiment discloses a novel focusing mechanism, which is assembled with external optical elements through the upper rigid mounting substrate 101 at the upper end of the flexible main base 1, and the lower rigid mounting substrate 102 at the lower end of the flexible main base and the flexible components Used to install the internal focusing assembly. At the same time, the flexible main base 1 of this embodiment provides rotational power through the internal motor assembly 7 through the flexible deformation of multiple sets of flexible components arranged in the circumferential direction, and uses the screw shaft 4 and the threaded connection of the nut 6 to convert the rotational force. It is converted into linear motion of the rigid mounting substrates at the upper and lower ends, so as to complete the vertical focusing of the optical element.

More specifically: the flexible components in this embodiment are divided into two types, one is the first flexible component 2 arranged along the first direction, and the other is the second flexible component 3 arranged along the second direction; wherein, The first direction specifically refers to a direction extending in the front-rear direction of the flexible main base 1 , and the second direction specifically refers to a direction extending in the left-right direction of the flexible main base 1 . The first flexible assembly 2 and the second flexible assembly 3 in this embodiment assist the upper rigid mounting substrate 101 and the lower rigid mounting substrate 102 to move in the vertical direction in a flexible deformation manner when the optical element is focused, while the The two flexible assemblies 3 are used to assemble the motor assembly 7 , the screw shaft 4 , the nut 6 and other focusing structures.

Preferably, in this embodiment, the first flexible component 2 includes a first steel arm 204 connected to the upper rigid mounting substrate 101 through a first flexible hinge 201 , and a second steel arm 204 connected to the lower rigid mounting substrate 102 through a third flexible hinge 203 steel arm 205;

The first steel arm 204 and the second steel arm 205 are connected by a second flexible hinge 202 .

Secondly, the above-mentioned second flexible assembly 3 includes a third steel arm 305 connected to the upper rigid mounting substrate 101 through a fourth flexible hinge 301 and a fourth steel arm 306 connected to the lower rigid mounting substrate 102 through a seventh flexible hinge 304 ;

A motor mounting substrate 307 is connected between the third steel arm 305 and the fourth steel arm 306 near the left side of the flexible main base 1 through the fifth flexible hinge 302 and the sixth flexible hinge 303 respectively;

A nut mounting base plate 308 is connected between the third steel arm 305 and the fourth steel arm 306 near the right side of the flexible main base 1 through the fifth flexible hinge 302 and the sixth flexible hinge 303 respectively;

The motor adapter 5 is assembled on the motor mounting substrate 307 and extends toward the interior of the flexible main base 1;

The nut 6 is attached to the nut mounting substrate 308 .

More preferably, the above-mentioned motor adapter seat 5 is fixedly connected to the motor mounting base plate 307 through the motor adapter seat flange 501 formed at the end thereof;

The motor assembly 7 is embedded in the motor adapter seat 5 , and is assembled and fixed with the blind hole inside the motor adapter seat 5 .

A locking nut 701 is fixedly connected to one end of the screw shaft 4 and the motor output shaft of the motor assembly 7;

A bearing cover 702 is fixedly connected to one end of the motor output shaft of the motor adapter 5;

The inside of the bearing cover 702 is formed as a bearing embedding cavity, and the bearing 703 rotatably connected with the screw shaft 4 is installed in the bearing embedding cavity.

One end of the nut 6 is embedded in the nut mounting board 308 , and the other end of the nut 6 is formed as a nut flange body 601 which is fixedly connected to the side surface of the nut mounting board 308 .

The focusing assembly of this embodiment mainly uses the motor assembly 7, the screw shaft 4, etc. as the power output structure. The motor assembly 7 is a rotating power source, which drives the screw shaft 4 to rotate, and the rotation of the screw shaft 4 is connected through the above-mentioned bearing. 703 realizes that, with the rotation of the screw shaft 4, the nut 6 that is threadedly connected to it and fixedly connected to the nut mounting base plate 308 adjusts the length of insertion and extension through the thread at the corresponding end of the screw shaft 4, so as to rotate the nut 6. The motion is converted into linear motion, and the focus adjustment of the optical element is realized through the flexible deformation of the above-mentioned flexible component.

The flexible assembly is mainly formed by the above-mentioned multiple flexible hinges and multiple steel arms arranged at intervals. Once the rigid mounting substrates at the upper and lower ends move axially, the flexible assembly will be deformed by the flexible hinges to assist focus adjustment. , and finally achieve the purpose of focusing.

In the above technical solution, the present invention provides a compact high-rigidity horizontal focusing mechanism, which has the following beneficial effects:

The vertical focusing mechanism of the present invention adopts the traditional rotating pair of the flexible hinge belt body, which simplifies the structure and eliminates the movement gap. Therefore, the focusing mechanism has the advantages of compact structure, small volume and high movement precision.

The flexible components on the side of the flexible main base of the present invention work independently, so the processing and assembly accuracy of the parts is not high, and the structural rigidity is improved by the multiple sets of flexible components distributed symmetrically along the axis, so the focusing mechanism has high rigidity, The first-order mode is high.

Certain exemplary embodiments of the present invention have been described above by way of illustration only, and it is needless to say that those skilled in the art may The described embodiments are modified. Accordingly, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of the claims of the present invention.

Claims (8)

1. A compact high-rigidity horizontal focusing mechanism, characterized in that the focusing mechanism comprises: a flexible main base (1), the upper end of the flexible main base (1) is used to install optical components; The flexible main base (1) has an upper rigid mounting substrate (101) at the upper end, a lower rigid mounting substrate (102) at the lower end, and flexible components arranged along the circumference of the flexible main base (1); The flexible components are divided into first flexible components (2) symmetrically arranged along the first direction of the flexible main base (1), and second flexible components symmetrically arranged along the second direction of the flexible main base (1) component(3); A motor adapter (5) is installed in the second flexible component (3) of the flexible main base (1); The motor adapter (5) is embedded with a motor assembly (7); The motor output shaft of the motor assembly (7) is drivingly connected with a lead screw shaft (4); A nut (6) is fixedly connected to one side of the second flexible assembly (3) relative to the motor assembly (7); One end of the screw shaft (4) away from the motor output shaft extends to the nut (6), and is threadedly connected with the nut (6); The motor assembly (7) drives the screw shaft (4) to rotate, and is adjusted by a nut (6) threadedly connected thereto and the flexible deformation of the first flexible assembly (2) and the second flexible assembly (3). The relative distance between the upper rigid mounting substrate (101) and the lower rigid mounting substrate (102) is to realize the focus adjustment of the optical element along the axial direction of the flexible main base (1). 2. A compact high-rigidity horizontal focusing mechanism according to claim 1, wherein the first flexible assembly (2) comprises a first flexible hinge (201) rigidly mounted on the upper part a first steel arm (204) connected to the base plate (101), and a second steel arm (205) connected to the lower rigid mounting base plate (102) through a third flexible hinge (203); The first steel arm (204) and the second steel arm (205) are connected by a second flexible hinge (202). 3. A compact high-rigidity horizontal focusing mechanism according to claim 2, wherein the second flexible assembly (3) comprises a fourth flexible hinge (301) rigidly mounted on the upper part a third steel arm (305) connected to the base plate (101), and a fourth steel arm (306) connected to the lower rigid mounting base plate (102) through a seventh flexible hinge (304); A fifth flexible hinge (302) and a sixth flexible hinge (303) respectively pass between the third steel arm (305) and the fourth steel arm (306) on the left side of the flexible main base (1). ) is connected with the motor mounting substrate (307); A fifth flexible hinge (302) and a sixth flexible hinge (303) are respectively passed between the third steel arm (305) and the fourth steel arm (306) on the right side of the flexible main base (1). ) is connected with a nut mounting base plate (308); The motor adapter (5) is assembled on the motor mounting substrate (307) and extends toward the interior of the flexible main base (1); The nut (6) is assembled to the nut mounting base plate (308). 4. A compact high-rigidity horizontal focusing mechanism according to claim 3, characterized in that the motor adapter (5) passes through the motor adapter flange (501) formed at the end of the motor adapter (5) ) is fixedly connected with the motor mounting substrate (307); The motor assembly (7) is embedded in the motor adapter seat (5), and is assembled and fixed with the blind hole inside the motor adapter seat (5). 5 . The compact high-rigidity horizontal focusing mechanism according to claim 4 , wherein the screw shaft ( 4 ) is fixedly connected with the motor output shaft of the motor assembly ( 7 ) and one end is fixed at one end. With lock nut (701); A bearing cover (702) is fixedly connected to one end of the motor output shaft of the motor adapter (5); The inside of the bearing cover (702) is formed as a bearing embedding cavity, and a bearing (703) rotatably connected with the screw shaft (4) is installed in the bearing embedding cavity. 6 . The compact high-rigidity horizontal focusing mechanism according to claim 3 , wherein one end of the nut ( 6 ) is embedded in the nut mounting base plate ( 308 ), and the nut The other end of (6) is formed as a nut flange body (601) fixedly connected to the side surface of the nut mounting base plate (308). 7. The compact high-rigidity horizontal focusing mechanism according to claim 3, wherein the first flexible hinge (201), the second flexible hinge (202), and the third flexible hinge (203) ), the fourth flexible hinge (301), the fifth flexible hinge (302), the sixth flexible hinge (303), and the seventh flexible hinge (304) are less rigid than the upper rigid mounting substrate (101) and the lower rigid mounting substrate (102), the first steel arm (204), the second steel arm (205), the third steel arm (305), the fourth steel arm (306), the motor mounting base (307) and the nut mounting base (308) stiffness. 8. A compact high-rigidity horizontal focusing mechanism according to claim 2, wherein the first steel arm (204) and the second steel arm (205) have hollow structures to form a Lightweight structure.

Images