A precision control device for a fiber positioning unit

Abstract

This utility model belongs to the field of assembly precision control technology, and discloses a precision control device for a fiber optic positioning unit. It includes: a rotary center positioning base, which is a cuboid with a square groove and two circular holes; a central rotary positioning rod, which is a cylinder with a built-in central through hole; an eccentric positioning rod, which is two cylinders with different diameters; and an eccentric shaft positioning rod, which is a cylinder with two built-in holes of different diameters. After the device is assembled, the distance between the axis of the central rotary positioning rod and the axis of the eccentric positioning rod / eccentric shaft positioning rod is 3±0.02mm. This utility model improves the control precision of the rotation axis spacing of the fiber optic positioning unit, achieves the control requirements for the rotation axis spacing precision of the fiber optic positioning unit, and effectively ensures the precise positioning requirements of the fiber optic positioning unit for deep space exploration telescopes.

Description

Technical Field

[0001] This utility model belongs to the technical field of devices for controlling the assembly accuracy of fiber optic positioning units in the LAMOST project, specifically relating to a device for controlling and adjusting the assembly accuracy of fiber optic positioning units in deep space exploration telescopes. Background Technology

[0002] The fiber optic positioning unit is a core component of the next-generation large sky area multi-object spectroscopic telescope (LAMOST telescope, also known as the Guo Shoujing telescope). It is installed on the focal plane of the LAMOST spectroscopic survey telescope and its main function is to receive spectral signals from various galaxies, stars and other celestial objects. Its assembly accuracy requirements are extremely high.

[0003] The fiber optic positioning unit can operate continuously under normal working conditions. The central axis and the eccentric axis simultaneously expand and return to zero. The central axis expands 360° and the eccentric axis expands 180°. After the rotary support is assembled, the distance between the axis of the φ4H7 hole of the eccentric part and the axis of the central part is equal to the distance between the eccentric axis and the axis of the fiber optic frame hole, and the distance is 3±0.02mm.

[0004] The original fiber optic positioning unit rotary bracket assembly did not use a precision control adjustment device. Because the distance between the axis of the φ4H7 hole in the eccentric part and the axis of the central part has high precision requirements, the distance of 3±0.02 mm is difficult to control, which brings great difficulties to the product installation and debugging, and easily leads to the axis distance exceeding the tolerance, thus failing to guarantee the assembly accuracy of the product.

[0005] To address the aforementioned problems, this utility model proposes a precision control device for fiber optic positioning units. Summary of the Invention

[0006] This invention addresses the problem of difficulty in controlling the assembly accuracy of the rotating bracket for fiber optic positioning units by providing a precision control device for fiber optic positioning units. This device is used to control and adjust the assembly accuracy of fiber optic positioning units, ensuring the precision control requirements and technical performance requirements of the fiber optic positioning units in the next-generation LAMOST project.

[0007] The technical solution of this utility model is implemented as follows: A precision control device for an optical fiber positioning unit, comprising: The rotation center positioning base is a cuboid with a square groove and two round holes; The central rotary positioning rod is a cylinder with a built-in central through hole, which is installed in the lower circular hole of the rotary central positioning base; An eccentric positioning bar consists of two cylinders of different diameters, which can be installed in the upper circular hole of the rotary center positioning base. The eccentric shaft positioning rod is a cylinder with two sections of different diameters inside, which can be installed in the upper circular hole of the rotary center positioning base. After the device is assembled, the distance between the axis of the built-in central rotary positioning bar and the axis of the eccentric positioning bar / eccentric shaft positioning bar is 3±0.02mm.

[0008] As a further embodiment of this utility model: the outer diameters of the central rotary positioning rod, the eccentric positioning rod, and the eccentric shaft positioning rod are equal and match the circular holes of the rotary central positioning base.

[0009] As a further embodiment of this utility model: the rotation center positioning base adopts a U-shaped structure design, the square groove is an open structure, and two circular holes are distributed on the upper and lower sides of the square groove, the diameter of the two circular holes being [missing information]. mm, the distance between the center axes of the two circular holes is mm.

[0010] As a further embodiment of this utility model: according to the product assembly process requirements, an eccentric positioning rod or an eccentric shaft positioning rod is installed in the upper circular hole of the rotary center positioning base.

[0011] As a further embodiment of this utility model: the central rotary positioning rod is a cylinder with a built-in central through hole, and the outer diameter of the cylinder is [missing information]. mm, the diameter of the central through hole is mm.

[0012] As a further embodiment of this invention: the eccentric positioning rod adopts a stepped shaft structure design, consisting of two cylindrical sections with different diameters, one of which is 70mm long and has a diameter of [missing information]. mm, the other section is 42mm long and has a diameter of mm. mm.

[0013] As a further embodiment of this utility model: the eccentric shaft positioning rod is a cylinder with a built-in stepped hole, and the outer diameter of the cylinder is... mm, aperture section is mm, with a depth of 60 mm, and another section with a diameter of mm. mm, with a depth of 10 mm.

[0014] As a further embodiment of this utility model: the rotary center positioning base, the central rotary positioning rod, the eccentric positioning rod and the eccentric shaft positioning rod are all made of HPb59-1 leaded brass material.

[0015] The beneficial effects of this application are as follows: 1. This application provides a precision control and adjustment device for the assembly of the optical fiber positioning unit rotary bracket. Through the control and adjustment of this device, the precision control requirement of the distance between the axis of the φ4H7 hole of the eccentric part and the axis of the central part of the optical fiber positioning unit rotary bracket is 3±0.02, thereby ensuring the technical performance requirements of the optical fiber positioning unit of the new generation LAMOST project.

[0016] 2. This application adapts to different process requirements by replacing the eccentric positioning bar and the eccentric shaft positioning bar.

[0017] The present application will be further described in detail below with reference to the accompanying drawings of the embodiments. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a precision control device for an optical fiber positioning unit according to the present invention. Figure 2 This is a three-dimensional schematic diagram of a precision control device for an optical fiber positioning unit according to the present invention. Figure 3 This is a schematic diagram illustrating the application of a precision control device for an optical fiber positioning unit according to the present invention.

[0019] The attached diagram is labeled as follows: 1. Rotation center positioning base; 2. Center rotation positioning bar; 3. Eccentric positioning bar; 4. Eccentric shaft positioning bar. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be described in more detail below with reference to the accompanying drawings.

[0021] In the accompanying drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, of the embodiments of this utility model.

[0022] The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0023] The following is in conjunction with the appendix Figure 1-3 The embodiments of this utility model will be described in detail below.

[0024] Example 1 This utility model provides a precision control device for an optical fiber positioning unit, comprising: Rotation center positioning base 1, which is a cuboid with a square groove and two round holes; The central rotary positioning rod 2 is a cylinder with a built-in central through hole, which is installed in the lower circular hole of the rotary central positioning base 1; The eccentric positioning rod 3 consists of two cylinders of different diameters, which can be installed in the upper circular hole of the rotary center positioning base 1. The eccentric shaft positioning rod 4 is a cylinder with two sections of different diameters built in, which can be installed in the upper circular hole of the rotary center positioning base 1. After the device is assembled, the distance between the axis of the built-in central rotary positioning rod 2 and the axis of the eccentric positioning rod 3 / eccentric shaft positioning rod 4 is 3±0.02mm.

[0025] Furthermore, the outer diameters of the central rotary positioning rod 2, the eccentric positioning rod 3, and the eccentric shaft positioning rod 4 are equal and match the circular holes of the rotary central positioning base 1.

[0026] Furthermore, the rotary center positioning base 1 adopts a U-shaped structure design, with an open square groove and two circular holes distributed on the upper and lower sides of the square groove. The diameter of the two circular holes is [missing information]. mm, the distance between the center axes of the two circular holes is mm.

[0027] Furthermore, according to the product assembly process requirements, an eccentric positioning rod 3 or an eccentric shaft positioning rod 4 is installed in the round hole at the upper end of the rotary center positioning base 1.

[0028] Furthermore, the central rotary positioning rod 2 is a cylinder with a built-in central through hole, and the outer diameter of the cylinder is [missing information]. mm, the diameter of the central through hole is mm.

[0029] Furthermore, the eccentric positioning rod 3 adopts a stepped shaft structure design, consisting of two cylinders with different diameters, one of which is 70mm long and has a diameter of [missing information]. mm, the other section is 42mm long and has a diameter of mm. mm.

[0030] Furthermore, the eccentric shaft positioning rod 4 is a cylinder with a built-in stepped hole, and the outer diameter of the cylinder is... mm, aperture section is mm, with a depth of 60 mm, and another section with a diameter of mm. mm, with a depth of 10 mm.

[0031] Furthermore, the rotary center positioning base 1, the central rotary positioning rod 2, the eccentric positioning rod 3, and the eccentric shaft positioning rod 4 are all made of HPb59-1 leaded brass material.

[0032] In use, connect the central axis and eccentric axis of the optical fiber positioning unit's rotating bracket to the central rotating positioning rod 2 and the eccentric positioning rod 3 / eccentric axis positioning rod 4, respectively. When the optical fiber positioning unit can operate continuously, it is in normal working condition, indicating high assembly accuracy. When the optical fiber positioning unit cannot operate continuously, it is in abnormal working condition, indicating low assembly accuracy. The assembly of the central axis and eccentric axis needs to be readjusted until the optical fiber positioning unit can operate continuously on the device.

[0033] Example 2 This utility model provides a device for assembling precision control and adjustment using fiber optic positioning units, comprising: a rotary center positioning base 1, a central rotary positioning rod 2, an eccentric positioning rod 3, and an eccentric shaft positioning rod 4; The rotary center positioning base 1 is a cuboid with a square groove and two round holes; the central rotary positioning rod 2 is a cylinder with a built-in central through hole; the eccentric positioning rod 3 is two cylinders with different diameters; and the eccentric shaft positioning rod 4 is a cylinder with two built-in holes of different diameters. The outer diameters of the central rotary positioning rod 2, the eccentric positioning rod 3, and the eccentric shaft positioning rod 4 are equal and match the rotary central positioning base 1. The central rotary positioning rod 2 is installed in the lower end inner hole of the rotary central positioning base 1; The inner hole at the upper end of the rotary center positioning base 1 can be fitted with an eccentric positioning rod 3 or an eccentric shaft positioning rod 4 (selected according to the product assembly process requirements). The optical fiber positioning unit is assembled with a precision control device, and the distance between the axis of the built-in central rotary positioning rod 2 and the axis of the eccentric positioning rod 3 (or eccentric shaft positioning rod 4) is 3±0.02 mm.

[0034] Furthermore, the rotary center positioning base 1 is a cuboid with a square groove and two circular holes. The cross-section of the cuboid is a square of 60mm × 60mm, with a length of 210mm. The square groove has a depth of 40mm and a length of 85mm. The upper and lower platforms of the square groove have thicknesses of 50mm and 75mm, respectively, and the upper and lower platforms are respectively provided with diameters of... A through hole of mm, with a distance of mm between the center axes of the two holes. mm. The material of the rotation center positioning base 1 is HPb59-1 leaded brass.

[0035] Furthermore, the central rotary positioning rod 2 is a cylinder with a built-in central through hole, and the outer diameter of the cylinder is... mm, the diameter of the central through hole is mm. The outer circular surface of the central rotary positioning rod 2 mates with the through hole of the lower platform of the rotary central positioning base 1, and its central through hole mates with the rotary bracket (central part) of the fiber optic positioning unit. The material of the central rotary positioning rod 2 is HPb59-1 leaded brass.

[0036] Furthermore, the eccentric positioning rod 3 consists of two cylinders with different diameters; one cylinder is 70mm long and has a diameter of [missing information]. mm, which mates with the through hole on the platform of the rotary center positioning base 1; the other section is 42 mm long and has a diameter of mm. mm, which mates with the φ4H7 hole of the optical fiber positioning unit's rotating bracket (eccentric part). The material of the eccentric positioning rod 3 is HPb59-1 leaded brass.

[0037] Furthermore, the eccentric shaft positioning rod 4 is a cylinder with two internal sections of different diameters, the outer diameter of which is... mm, aperture section is The diameter is mm, and the depth is 60 mm. Its outer circular surface mates with the through hole on the platform of the rotary center positioning base 1. The diameter of the other section is mm. The diameter is mm, and the depth is 10 mm. It is matched with the eccentric rotating shaft of the fiber optic positioning unit. The material of the eccentric positioning rod 3 is HPb59-1 leaded brass.

[0038] Example 3 This utility model provides a device for controlling and adjusting the assembly precision of fiber optic positioning units in deep space exploration telescopes. It is characterized by comprising four parts: a rotating center positioning base 1, a central rotating positioning rod 2, an eccentric positioning rod 3, and an eccentric shaft positioning rod 4. The rotating center positioning base 1 is used to mate the central rotating positioning rod 2, the eccentric positioning rod 3, or the eccentric shaft positioning rod 4. Figure 1 As shown, the eccentric positioning rod 3 and the eccentric shaft positioning rod 4 need to be selected according to the assembly process requirements. The optical fiber positioning unit assembly accuracy control device has a center rotary positioning rod 2 built in it with an axis distance of 3±0.02mm between the axis of the eccentric positioning rod 3 (or the eccentric shaft positioning rod 4) and the axis of the eccentric positioning rod 3 (or the eccentric shaft positioning rod 4).

[0039] Furthermore, the rotating center positioning base 1 is made of HPb59-1 leaded brass, and is a cuboid with a square groove and two round holes. The cross-section of the cuboid is a square of 60mm × 60mm, with a length of 210mm. The square groove has a depth of 40mm and a length of 85mm. The upper and lower platforms of the square groove have thicknesses of 50mm and 75mm, respectively, and the upper and lower platforms are respectively provided with a diameter of... A through hole of mm is used for connecting other components; the distance between the center axes of the two holes is [missing information]. mm.

[0040] Furthermore, the central rotary positioning rod 2 is made of HPb59-1 leaded brass, and is a cylinder with a built-in central through hole, the outer diameter of which is... mm, the diameter of the central through hole is mm, used for connecting to other components.

[0041] Furthermore, the eccentric positioning rod 3 is made of HPb59-1 leaded brass, and consists of two cylinders of different diameters, one 70mm long and the other with a diameter of... mm, the other section is 42mm long and has a diameter of mm. mm, with cylindrical surfaces at both ends used for connecting to other components.

[0042] Furthermore, the eccentric shaft positioning rod 4 is made of HPb59-1 leaded brass and is a cylinder with two internal holes of different diameters. The outer diameter of the cylinder is... mm, aperture section is The diameter is mm, and the depth is 60 mm. Its outer circular surface mates with the through hole on the platform of the rotary center positioning base 1. The diameter of the other section is mm. mm, with a depth of 10 mm, used for connecting with other components.

[0043] Thus, the objective of this utility model has been achieved.

[0044] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A precision control device for an optical fiber positioning unit, characterized in that, include: The rotation center positioning base is a cuboid with a square groove and two round holes; The central rotary positioning rod is a cylinder with a built-in central through hole, which is installed in the lower circular hole of the rotary central positioning base; An eccentric positioning bar consists of two cylinders of different diameters, which can be installed in the upper circular hole of the rotary center positioning base. The eccentric shaft positioning rod is a cylinder with two sections of different diameters inside, which can be installed in the upper circular hole of the rotary center positioning base. After the device is assembled, the distance between the axis of the built-in central rotary positioning bar and the axis of the eccentric positioning bar / eccentric shaft positioning bar is 3±0.02mm.

2. The precision control device for an optical fiber positioning unit according to claim 1, characterized in that, The outer diameters of the central rotary positioning rod, the eccentric positioning rod, and the eccentric shaft positioning rod are equal and match the circular holes of the rotary central positioning base.

3. The precision control device for an optical fiber positioning unit according to claim 2, characterized in that, The rotation center positioning base adopts a U-shaped structure design, with an open square groove and two circular holes distributed on the upper and lower sides of the square groove. The diameter of the two circular holes is [missing information]. mm, the distance between the center axes of the two circular holes is mm.

4. The precision control device for an optical fiber positioning unit according to claim 3, characterized in that, According to the product assembly process requirements, an eccentric positioning bar or an eccentric shaft positioning bar is installed in the round hole at the upper end of the rotary center positioning base.

5. The precision control device for an optical fiber positioning unit according to claim 1, characterized in that, The central rotary positioning rod is a cylinder with a built-in central through hole, and the outer diameter of the cylinder is [missing information]. mm, the diameter of the central through hole is mm.

6. The precision control device for an optical fiber positioning unit according to claim 1, characterized in that, The eccentric positioning rod adopts a stepped shaft structure design, consisting of two cylindrical sections with different diameters, one of which is 70mm long and has a diameter of [missing information]. mm, the other section is 42mm long and has a diameter of mm. mm.

7. The precision control device for an optical fiber positioning unit according to claim 1, characterized in that, The eccentric shaft positioning rod is a cylinder with a built-in stepped hole, and the outer diameter of the cylinder is... mm, aperture section is mm, with a depth of 60 mm, and another section with a diameter of mm. mm, with a depth of 10 mm.

8. The precision control device for an optical fiber positioning unit according to any one of claims 1-7, characterized in that, The rotary center positioning base, the central rotary positioning rod, the eccentric positioning rod, and the eccentric shaft positioning rod are all made of HPb59-1 leaded brass.

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