CN112032156A - A high-precision reset mechanism and method - Google Patents

Abstract

The invention relates to the technical field of mechanical design, and discloses a high-precision reset mechanism and method, which are used for connecting a first structural member and a second structural member, and the two are also connected by a second installation screw; comprising an upper positioning member and a second structural member. a lower positioning member, the upper positioning member is fixed on the first structural member, and the lower positioning member is fixed on the second structural member; the upper positioning member and the lower positioning member are arranged opposite to each other, between the two A spherical positioning member is provided; the upper positioning member, the spherical positioning member and the lower positioning member are connected and positioned through positioning connecting members. The present invention can reliably reset the two structural components, and has simple structure, reliable function and high reset precision.

Description

A high-precision reset mechanism and method

technical field

The invention relates to the technical field of mechanical design, and more particularly, to a high-precision reset mechanism and method.

Background technique

For many precision instruments, after the key components are required to be disassembled (for maintenance, repair, etc.) and then reinstalled, the installation position remains unchanged. Instruments or components with different functions have different requirements for the accuracy of reset after installation. Taking a high-precision aerial three-line array surveying and mapping camera as an example, the focal plane components and inertial measurement components inside the camera both require a reset accuracy of 2μm after disassembly, because the focal plane reset accuracy affects the camera's principal point position error, and the inertial measurement component reset accuracy. The eccentricity error and the collimation axis error of the camera directly determine the measurement accuracy of the three-line scan camera. The most commonly used reset method is to use a positioning pin. The accuracy of the taper pin is higher than that of the direct pin, but the reset accuracy of the taper pin can only reach 5-6μm at the highest, which does not meet the positioning accuracy requirements.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a high-precision reset mechanism and method in view of the technical problems existing in the prior art, which can reliably reset two structural components, and has a simple structure, reliable function and high reset accuracy.

In order to solve the problem proposed above, the technical scheme adopted in the present invention is:

The invention provides a high-precision reset mechanism for connecting a first structural member and a second structural member, and the two are also connected by a second mounting screw; including an upper positioning member and a lower positioning member, the upper positioning member is fixed on the first structural member, and the lower positioning member is fixed on the second structural member; the upper positioning member and the lower positioning member are arranged opposite to each other, and a spherical positioning member is arranged between them; The positioning piece, the spherical positioning piece and the lower positioning piece are connected and positioned through the positioning connecting piece.

Further, a pressing member is also provided between the positioning connecting member and the end of the spherical positioning member.

Further, the middle part of the spherical positioning member is a cylindrical section, and the two ends thereof form spherical surfaces; the end surfaces corresponding to the pressing member, the lower positioning member and the spherical positioning member are also respectively formed with spherical surfaces.

Further, the outer cylindrical section of the spherical positioning member is ground with the cylindrical hole of the upper positioning member; the outer spherical surfaces at both ends of the spherical positioning member are respectively ground with the pressing member and the lower positioning member at the same time.

Further, the positioning connector adopts a positioning screw.

Further, the spherical positioning member and the upper positioning member are made of materials with lubricating properties, including ceramic-based and iron-based solid self-lubricating composite materials.

The present invention also provides a high-precision reset method, and the specific steps of the method include the following steps:

Step S1: making and marking the reset mechanism, including an upper positioning piece, a spherical positioning piece, a lower positioning piece, a positioning connecting piece and a pressing piece;

Step S2: carry out matching research on the cylindrical hole of the upper positioning member and the outer cylindrical surface of the spherical positioning member, and carry out matching grinding on the spherical surface between the pressing member, the lower positioning member and the spherical positioning member;

Step S3: fixing the lower positioning member on the second structural member, and fixing the upper positioning member on the first structural member;

Step S4: disposing the upper positioning member and the lower positioning member relative to each other, and disposing the spherical positioning member between them;

Step S5: using the positioning connecting piece and the pressing piece to connect the upper positioning piece and the lower positioning piece;

Step S6: connecting the first structural member and the second structural member with a second mounting screw.

Compared with the prior art, the beneficial effects of the present invention are:

The invention adopts the upper positioning member, the lower positioning member and the spherical positioning member, which can reliably reset the two structural members, and has the advantages of simple structure, reliable function and high reset accuracy, which can reach 2-3 μm; in addition, the spherical positioning member is used, which is easy to Adjusting the installation angles of the two structural parts avoids the loss of precision (such as flatness, etc.) caused by machining on the structural parts, making installation more convenient and improving installation efficiency.

Description of drawings

Fig. 1 is the installation principle diagram of the high-precision reset mechanism of the present invention;

Fig. 2 is the structural representation of the high-precision reset mechanism of the present invention;

Fig. 3 is another structural schematic diagram of the high-precision reset mechanism of the present invention;

Fig. 4 is the flow chart of the high-precision reset method of the present invention;

FIG. 5 is a diagram showing an example of installation of the high-precision reset mechanism of the present invention.

The reference numerals are described as follows: 100-reset mechanism, 1-first structural member, 2-upper positioning member, 3-ball positioning member, 4-lower positioning member, 5-second structural member, 6-positioning connecting member, 7-pressing piece, 8-first mounting screw, 9-second mounting screw, 10-IMU assembly (inertial measurement assembly), 11-IMU support frame, 12-lens tube flange.

Detailed ways

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the related drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that a thorough and complete understanding of the present disclosure is provided.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention.

1 and 2, the present invention also provides a high-precision reset mechanism. The reset mechanism 100 is used to connect the first structural member 1 and the second structural member 5, which can ensure the reliability of the disassembly, installation and reset of the two and can ensure the reliability of the reset. To ensure its reset accuracy, the first structural member 1 and the second structural member 5 are also connected by a second mounting screw 9 .

The reset mechanism 100 includes an upper positioning member 2, a spherical positioning member 3, a lower positioning member 4 and a positioning connecting member 6, the upper positioning member 2 is fixed on the first structural member 1, and the lower positioning member 4 is fixed on the second structural member 5 . The upper positioning member 2 and the lower positioning member 4 are arranged opposite to each other, and a spherical positioning member 3 is arranged between them. The positioning connecting member 6 passes through the upper positioning member 2, the spherical positioning member 3 and the lower positioning member 4 in sequence, and positions the three.

Further, in order to ensure the reliability and stability of the positioning and installation among the upper positioning member 2 , the spherical positioning member 3 and the lower positioning member 4 , the ends of the positioning connecting member 6 and the spherical positioning member 3 are There is also a pressing member 7 therebetween.

Further, the middle part of the spherical positioning member 3 is a cylindrical section, and the two ends thereof form spherical surfaces; the end surfaces corresponding to the pressing member 7, the lower positioning member 4 and the spherical positioning member 3 also form spherical surfaces respectively. , so that the lower positioning member 4 and the spherical positioning member 3 and the pressing member 7 and the spherical positioning member 3 can be easily installed and matched. Further, the outer cylindrical section of the spherical positioning member 3 is matched with the cylindrical hole of the upper positioning member 2, and there is no radial gap between the two. The outer spherical surfaces at both ends of the spherical positioning member 3 are respectively ground with the pressing member 7 and the lower positioning member 4 at the same time, so that the lower positioning member 4 and the spherical positioning member 3 and the pressing member 4 can be ensured. There is no gap between the part 7 and the spherical positioning part 3, which is also convenient for installation when resetting after disassembly.

Further, the positioning connecting member 6 adopts positioning screws, which are simple in structure, reliable in function and convenient for installation and connection.

Further, the materials of the spherical positioning member 3 and the upper positioning member 2 can be all or individually selected as materials with lubricating properties, such as ceramic-based, iron-based and other solid self-lubricating composite materials, which can further improve the resetting of the mechanism after disassembly. installation performance.

In this embodiment, the first structural member 1 and the second structural member 5 are connected and installed through three sets of the reset mechanisms 100, and the number of the reset mechanisms 100 can be increased or decreased according to actual needs to ensure that the two can be installed and reset. reliability and stability. Further, the components of each group of the reset mechanism 100 need to be marked and used in groups to avoid mixing. When resetting is performed by the reset mechanism 100, the positional correspondence between the first structural member 1 and the second structural member 5 will not change, which ensures the reset accuracy, and the first structural member 1 relative to the second structural member 5 is ensured. High-precision reset of the two structural parts 5 .

The present invention also provides a high-precision reset method for realizing high-precision reset between the first structural member 1 and the second structural member 5. Referring to FIG. 4, the specific steps of the method include the following:

Step S1 : making and marking the reset mechanism, including an upper positioning member 2 , a spherical positioning member 3 , a lower positioning member 4 , a positioning connecting member 6 and a pressing member 7 .

In this step S1, since multiple sets of reset mechanisms can be arranged between the first structural member 1 and the second structural member 5, they are marked to avoid mixed use.

Step S2: The cylindrical hole of the upper positioning member 2 and the outer cylindrical surface of the spherical positioning member 3 are matched and ground, and the spherical surfaces between the pressing member 7, the lower positioning member 4 and the spherical positioning member 3 are respectively matched. This can ensure that the radii of the two cylinders or spherical surfaces that cooperate with each other are exactly the same, thereby ensuring their matching accuracy.

Step S3 : fixing the lower positioning member 4 on the second structural member 5 , and fixing the upper positioning member 2 on the first structural member 1 .

In this step S3, the upper positioning member 2 and the lower positioning member 4 are respectively fixed with first mounting screws 8, and they cannot be disassembled after being fixed.

Step S4: Set the upper positioning member 2 and the lower positioning member 4 opposite to each other, set the spherical positioning member 3 therebetween, and adjust the position of the first structural member 1 so that the set and The required position and attitude. The cylindrical hole of the upper positioning member 2 and the lower positioning member 4 are respectively fitted with the outer cylindrical surface and the spherical surface of the spherical positioning member 3 .

Step S5: using the positioning connecting piece 6 and the pressing piece 7 to connect the upper positioning piece 2 and the lower positioning piece 4, the positioning connecting piece 6 cannot be disassembled after being installed. The pressing member 7 is in contact with the spherical surface of the spherical positioning member 3 .

Step S6 : connecting the first structural member 1 and the second structural member 5 with a second mounting screw 9 .

In the above, since the upper positioning member 2 and the lower positioning member 4 cannot be disassembled after being fixed, when the first structural member 1 needs to be disassembled, only the second installation screw 9 can be disassembled, and the first structural member 1 can be removed. A structural member 1 and its upper positioning member 4 are disassembled together. During installation, when the first structural member 1 is reset according to the original corresponding relationship, since there is no gap between the cylindrical hole of the upper positioning member 4 and the outer cylindrical section of the spherical positioning member 3, high-precision reset can be achieved. Easy and reliable installation can also improve installation efficiency.

The following takes the installation of an inertial measurement assembly of an aerial three-line array surveying and mapping camera as an example to further illustrate the process of the above-mentioned reset mechanism realizing the reset method. As shown in FIG. 5 , the IMU assembly 10 is installed on the IMU support frame 11 , and the IMU support frame 11 is installed on the lens barrel flange 12 .

After the IMU assembly 10 is calibrated, the relative position of the IMU assembly 10 and the lens barrel mounted on the lens barrel flange 12 cannot be changed, otherwise the calibrated eccentricity error and collimation axis error will no longer be applicable. However, when the IMU assembly 10 may fail and needs to be disassembled for maintenance, in order to ensure that the eccentricity and boresight error of the IMU assembly 10 remain unchanged, the above-mentioned reset mechanism is required. The reset mechanism is arranged on the IMU support frame 11, the IMU assembly 10 and the IMU support frame 11 are fixed and non-detachable, but the IMU assembly 10 and the IMU support frame 11 can be carried out as a whole. After disassembling, the IMU support frame 11 and the lens barrel flange 12 are connected and reset by the reset mechanism to ensure that the eccentricity and boresight error of the IMU assembly 10 remain unchanged.

Further, the reset process of the IMU assembly 10 by the reset mechanism is as follows:

(1) Make three sets of the reset mechanisms, the internal components of each set of reset mechanisms should be marked separately, used in groups, and the cylindrical hole of the upper positioning member 2 and the outer cylindrical surface of the spherical positioning member 3 in each set of reset mechanisms Carrying out matching and grinding, the spherical surfaces of the pressing member 7 , the lower positioning member 4 and the spherical positioning member 3 are respectively matched and ground.

(2) Install the lower positioning member 4 on the lens barrel flange 12, and install the upper positioning member 2 on the IMU support frame 11. The upper positioning member 2 and the lower positioning member 4 are respectively Fasten with screws, and screw glue can be used to increase the connection reliability;

(3) The positioning member 2 on the IMU support frame 11 is arranged opposite to the lower positioning member 4 on the lens barrel flange 12, and the spherical positioning member 3 is provided to adjust the position of the IMU support frame 11. The position enables it to achieve the set and required position and posture, and ensures smooth installation between each set of reset mechanisms and the IMU support frame 11, and there is no stuck position.

(4) Install the pressing member 7 and the positioning connecting member 6, and the positioning connecting member 6 can use thread glue or the like to increase the connection reliability.

(5) Use the second screw to fix the IMU support frame 11 on the lens barrel flange 12 .

(6) Install the IMU assembly 10 on the IMU bracket 11, and use the first screw to fix it, and the first screw can be made of thread glue or the like to increase the connection reliability.

In the above, when the IMU assembly 10 needs to be disassembled, the second screw of the IMU support frame 11 can be disassembled, so that the IMU support frame 11, the IMU assembly 10 and the upper positioning member 2 are disassembled together, and the positional accuracy after reset can reach 2-3 μm , to meet the usage requirements.

The high-precision reset mechanism and method provided by the invention can achieve a reset accuracy of 2-3 μm in practical application, which can meet the reset accuracy requirements of the focal plane assembly and inertial measurement assembly of a three-line array aerial surveying and mapping camera, and can also be extended to other reset accuracy. In the required mechanical structure.

The above-mentioned embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited by the above-mentioned embodiments, and any other changes, modifications, substitutions, combinations, The simplification should be equivalent replacement manners, which are all included in the protection scope of the present invention.

Claims (7)

1. A high accuracy canceling release mechanical system for connect first structure (1) and second structure (5), still connect through second mounting screw (9) between the two, its characterized in that: the positioning device comprises an upper positioning piece (2) and a lower positioning piece (4), wherein the upper positioning piece (2) is fixed on the first structural piece (1), and the lower positioning piece (4) is fixed on the second structural piece (5); the upper positioning piece (2) and the lower positioning piece (4) are arranged oppositely, and a spherical positioning piece (3) is arranged between the upper positioning piece and the lower positioning piece; the upper positioning piece (2), the spherical positioning piece (3) and the lower positioning piece (4) are connected and positioned through a positioning connecting piece (6).

2. The high precision reset mechanism of claim 1, wherein: a pressing piece (7) is further arranged between the positioning connecting piece (6) and the end part of the spherical positioning piece (3).

3. The high precision reset mechanism of claim 2, wherein: the middle part of the spherical positioning piece (3) is a cylindrical section, and two ends of the spherical positioning piece form a spherical surface; the pressing piece (7), the lower positioning piece (4) and the corresponding end surfaces of the spherical positioning piece (3) also form spherical surfaces respectively.

4. A high precision reset mechanism according to claim 3 wherein: the outer cylindrical section of the spherical positioning piece (3) is matched with the cylindrical hole of the upper positioning piece (2); the outer spherical surfaces at the two ends of the spherical positioning piece (3) are simultaneously ground with the pressing piece (7) and the lower positioning piece (4) respectively.

5. The high precision reset mechanism of claim 4, wherein: the positioning connecting piece (6) adopts a positioning screw.

6. The high precision reset mechanism of claim 5, wherein: the spherical positioning piece (3) and the upper positioning piece (2) are made of materials with lubricating property, including ceramic-based and iron-based solid self-lubricating composite materials.

7. A reset method based on the high-precision reset mechanism according to claims 1 to 6, characterized in that: the method comprises the following specific steps:

step S1: manufacturing a resetting mechanism and marking the resetting mechanism, wherein the resetting mechanism comprises an upper positioning piece (2), a spherical positioning piece (3), a lower positioning piece (4), a positioning connecting piece (6) and a pressing piece (7);

step S2: the cylindrical hole of the upper positioning piece (2) and the outer cylindrical surface of the spherical positioning piece (3) are ground, and spherical surfaces among the pressing piece (7), the lower positioning piece (4) and the spherical positioning piece (3) are ground respectively;

step S3: fixing the lower positioning element (4) to the second structural element (5) and the upper positioning element (2) to the first structural element (1);

step S4: arranging the upper positioning piece (2) and the lower positioning piece (4) oppositely, arranging the spherical positioning piece (3) between the upper positioning piece and the lower positioning piece, and adjusting the position of the first structural member (1) to reach a set position and a set posture;

step S5: the upper positioning piece (2) and the lower positioning piece (4) are connected by adopting the positioning connecting piece (6) and the pressing piece (7);

step S6: and connecting the first structural member (1) and the second structural member (5) by adopting a second mounting screw (9).

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