A rotational vibration damping structure and a rotational optical imaging system

Abstract

The present invention discloses a rotary vibration damping structure and a rotary optical imaging system, comprising a closed damping chamber, a damping unit and a rotary connecting shaft. The closed damping chamber is filled with damping liquid; the damping unit is arranged in the damping liquid in the closed damping chamber; the damping unit can rotate without damping in the damping liquid; the rotary connecting shaft passes through the closed damping chamber and is sealed with the closed damping chamber; the rotary connecting shaft is fixedly connected to the damping unit, an external mounting seat is provided at the upper end for connecting an external device, and a fixed mounting seat is provided at the lower end. The damping unit of the present invention is divided into two layers, upper and lower, and circular holes with equal spacing are designed on the surfaces of the upper and lower layers; the connection is made by relying on positioning holes, so that the circular holes on the upper and lower surfaces are staggered in the circumferential direction. When the damping unit vibrates, the contact area between the disc structure and the damping liquid is the entire cross-sectional area of the disc. Therefore, the damping unit is subjected to a large resistance from the damping liquid, thereby suppressing the vibration and achieving the purpose of vibration reduction.

Description

Technical Field

[0001] The present invention belongs to the technical field of precision optical 360-degree scanning imaging, and relates to a rotational vibration elimination and damping structure and a rotational optical imaging system. Background Art

[0002] Intermittent motion mechanisms, as automation technology, have been widely used in various fields of product processing, assembly, and inspection automation, improving the efficiency of manufacturing enterprises. Common intermittent motion mechanisms include ratchets, sheaves, incomplete gear mechanisms, cylindrical cam mechanisms, and cambered cam mechanisms. Their simple structures and mature manufacturing technologies have led to their widespread application in various mechanical automation production equipment and production lines. However, ratchets and sheaves, due to their clearance, lead to excessive noise and impact, making them unsuitable for high-speed applications. Cylindrical cam mechanisms and cambered cam mechanisms have high theoretical speeds, but their high-pair contact mechanism leads to high wear and severe heat generation, making them unsuitable for long-term high-speed applications. Furthermore, while directly using servo motors and stepper motors for scanning image acquisition can achieve high-precision positioning and accurate fixed-angle image acquisition, they are not suitable for scanning applications with frequent pauses. Therefore, the search for new intermittent motion mechanisms with higher speeds and lower vibration is of great practical significance. Summary of the Invention

[0003] The purpose of the present invention is to solve the problems of low stopping frequency and vibration suppression of existing stopping mechanisms, and to provide a rotational vibration damping structure and a rotational optical imaging system.

[0004] To achieve the above objectives, the present invention adopts the following technical solutions:

[0005] In a first aspect, the present invention provides a rotational vibration damping structure, comprising:

[0006] A closed damping cavity filled with a damping liquid;

[0007] A damping unit, the damping unit being disposed in a damping liquid in a closed damping chamber; the damping unit being capable of performing undamped rotation in the damping liquid; and the damping unit being capable of performing damped motion perpendicular to a rotation plane in the damping liquid;

[0008] A rotating connecting shaft passes through the closed damping chamber and is sealed with the closed damping chamber; the rotating connecting shaft is fixedly connected to the damping unit and is used to drive the damping unit to rotate in the damping liquid; an external mounting seat is provided at the upper end of the rotating connecting shaft for connecting an external device, and a fixed mounting seat is provided at the lower end.

[0009] Furthermore, the damping unit of the present invention includes two damping plates fixedly connected up and down, the damping plates include an outer ring and an inner ring, the outer ring and the inner ring are connected by a transition section, and the inner ring is located below the outer ring.

[0010] Furthermore, in the present invention, a plurality of through holes evenly arranged along the circumferential direction are provided on the outer ring and the connection between the outer ring and the transition section; and the through holes at relative positions on the upper and lower damping plates are staggered along the circumferential direction.

[0011] Furthermore, the through holes on the outer ring of the present invention are staggered relative to the through holes at the connection points.

[0012] Furthermore, the inner ring of the present invention is provided with a plurality of positioning holes evenly arranged along the circumferential direction, the positioning holes of the upper and lower damping plates are arranged relative to each other, and the two damping plates are fixedly connected by bolts.

[0013] Furthermore, the sealed damping chamber of the present invention is surrounded by an outer shell with an opening at one end and a bottom shell sealedly connected to the outer shell, and the bottom shell is sealed and installed at the opening of the outer shell.

[0014] Furthermore, in the present invention, through holes are provided in the middle of the outer shell and the bottom shell, and the positions of the through holes are relative to each other. The rotating connecting shaft passes through the through holes in the middle of the outer shell and the bottom shell and penetrates the closed damping cavity; a plurality of sealing grooves are provided on the inner sides of the through holes of the outer shell and the bottom shell, and sealing rings are provided in the sealing grooves for sealing the outer shell and the bottom shell with the rotating connecting shaft.

[0015] In a second aspect, the present invention provides a rotating optical imaging system, comprising a rotating scanning imaging unit, a base and the rotating vibration-damping structure; the rotating scanning imaging unit is installed at the upper end of the rotating connecting shaft, and the outer shell and bottom shell of the rotating vibration-damping structure are installed on the base.

[0016] Furthermore, the bottom shell of the present invention includes an outer ring and an inner ring, the outer ring is connected to the inner ring through a transition section, and the inner ring is located below the outer ring; a plurality of sealing grooves are opened on the inner and outer sides of the inner ring, and sealing rings are arranged in the sealing grooves.

[0017] Furthermore, a mounting hole is provided in the middle of the base of the present invention, the inner ring of the bottom shell is arranged in the mounting hole of the base and is sealed by a sealing ring; an outward extending section is provided at the opening of the outer shell for fixing the outer shell on the base.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention provides a rotary vibration damping structure. Its damping unit is divided into two layers, each with equally spaced circular holes. Positioning holes are used for adjustment and fixed connection, so that the circular holes on the upper and lower surfaces are staggered in the circumferential direction. When the damping unit vibrates, the contact area between the disc structure and the damping fluid covers the entire cross-sectional area of the disc. As a result, the damping unit experiences significant resistance from the damping fluid, thereby suppressing vibration and achieving the desired vibration reduction effect.

[0020] Furthermore, the damping plate of the present invention is a porous plate-type disc structure, and due to the sealing structure designed therein, the damping effect of the closed damping cavity is ensured.

[0021] The present invention provides a rotating optical imaging system, belonging to the field of high-frequency, high-quality optical 360° imaging scanning, involving a single optical imaging mirror scanning device capable of indexed rotation. Using only a single high-resolution camera, the system combines the camera with a rotating vibration damping structure. This single camera can capture high-quality images from different angles, which are then fused to complete 360° panoramic image acquisition. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 It is a schematic diagram of the overall structure of the vibration-absorbing and damping structure of the present invention.

[0024] Figure 2 This is a schematic diagram of the mechanism of the lower damping plate of the present invention.

[0025] Figure 3 It is a structural schematic diagram of the upper damping plate of the present invention.

[0026] Figure 4 This is an axonometric drawing of the double-layer damping plate structure of the present invention installed with vertical offset.

[0027] Figure 5 Schematic diagram of the structure of the bottom shell of the present invention, wherein (a) is an axonometric view and (b) is a sectional view.

[0028] Figure 6 Schematic diagram of the structure of the rotating optical imaging system of the present invention.

[0029] Wherein: 1-sealed damping chamber, 2-damping unit, 3-rotational scanning imaging unit, 4-housing, 5-damping liquid, 6-bottom shell, 7-base, 8-rotational connecting shaft. DETAILED DESCRIPTION

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0033] In the description of the embodiments of the present invention, it should be noted that if the terms "upper," "lower," "horizontal," "inner," etc. appear, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the inventive product is typically placed when in use. These terms are merely for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first," "second," etc. are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0034] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0035] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0036] The present invention is described in further detail below with reference to the accompanying drawings:

[0037] See also Figure 1 An embodiment of the present invention discloses a rotational vibration damping structure, including a closed damping chamber 1, a damping unit 2 and a rotating connecting shaft 8.

[0038] The sealed damping chamber 1 is filled with damping fluid 5 and is enclosed by a housing 4 with an opening at one end and a bottom housing 6 sealedly connected to the housing 4. The bottom housing 6 is sealedly mounted at the opening of the housing 4. Through-holes are provided in the center of both the housing 4 and the bottom housing 6, facing each other. A rotary connecting shaft 8 passes through the through-holes in the center of the housing 4 and the bottom housing 6 and extends through the sealed damping chamber 1. Several sealing grooves are provided inside the through-holes in both the housing 4 and the bottom housing 6, each containing a sealing ring to seal the housing 4 and the bottom housing 6 against the rotary connecting shaft 8.

[0039] like Figure 2 As shown, the damping unit 2 is arranged in the damping liquid 5 of the closed damping chamber 1; the damping unit 2 can rotate without damping in the damping liquid 5; Figure 3 and Figure 4 As shown, the damping unit 2 includes two damping plates fixedly connected in an upper and lower position. The damping plates include an outer ring and an inner ring. The outer ring and the inner ring are connected by a transition section, and the inner ring is located below the outer ring. A number of through holes evenly arranged along the circumference are provided at the connection between the outer ring and the transition section. The through holes at relative positions on the upper and lower damping plates are staggered along the circumference. The through holes on the outer ring are staggered relative to the through holes at the connection. A number of positioning holes evenly arranged along the circumference are provided on the inner ring. The positioning holes of the upper and lower damping plates are relatively arranged, and the two damping plates are fixedly connected by bolts.

[0040] The rotating connecting shaft 8 passes through the closed damping chamber 1 and is sealed with the closed damping chamber 1; the rotating connecting shaft 8 is fixedly connected to the damping unit 2 and is used to drive the damping unit 2 to rotate in the damping liquid 5; an external mounting seat is provided at the upper end of the rotating connecting shaft 8 for connecting an external device, and a fixed mounting seat is provided at the lower end.

[0041] See also Figure 6 The embodiment of the present invention discloses a rotating optical imaging system, comprising a rotating scanning imaging unit 3, a base 7 and a rotating vibration damping structure; the rotating scanning imaging unit 3 is mounted on the upper end of a rotating connecting shaft 8, and the outer shell 4 and the bottom shell 6 of the rotating vibration damping structure are mounted on the base 7. Figure 5As shown, the bottom shell 6 comprises an outer ring and an inner ring. The outer ring is connected to the inner ring via a transition section, and the inner ring is located below the outer ring. Several sealing grooves are provided on both the inner and outer sides of the inner ring, each containing a sealing ring. A mounting hole is provided in the center of the base 7. The inner ring of the bottom shell 6 is mounted within the mounting hole of the base 7 and sealed with a sealing ring. The opening of the outer shell 4 is provided with an outward extension for securing the outer shell 4 to the base 7.

[0042] Principle of the present invention:

[0043] The sealed damping chamber 1 of the present invention comprises an outer shell 4 and a bottom shell 6. The sealed damping chamber 1 is filled with a damping fluid 5, and the damping unit 2 is immersed in the damping fluid 5. The rotary scanning imaging unit 3 drives the damping unit 2 to rotate together to complete image scanning. The damping unit 2 is divided into two layers, each with equally spaced circular holes. Positioning holes secure the connection, staggering the circular holes in the upper and lower surfaces in the circumferential direction.

[0044] The damping unit 2 is a porous plate-type disc structure. When the disc structure rotates, the contact area of the damping liquid 5 does not change. Therefore, the resistance of the damping liquid 5 to the damping unit 2 is very small. Conversely, when the damping unit 2 vibrates, the contact area between the disc structure and the damping liquid 5 is the entire cross-sectional area of the disc. Therefore, the resistance of the damping unit 2 to the damping liquid 5 is very large, thereby achieving the purpose of vibration reduction. The surface porosity of the plate-type disc structure is to achieve the purpose of repeatedly changing the flow direction of the damping liquid 5 when flowing in the porous structure, disturbing the flow field of the damping fluid and causing greater resistance. Factors affecting the resistance of the damping liquid 5 include the viscosity of the damping liquid 5, the structure, and the size and position of the pores. The damping liquid 5 can be mechanical lubricant or coolant. Because the damping liquid has a certain viscosity, the contact area between the lubricant and the disc structure is larger when the disc structure vibrates up and down, thereby generating a greater damping force.

[0045] The rotary scanning imaging unit 3 is a rotating structure, so the structure of the housing 4 is to avoid interference with the rotary scanning imaging unit 3 during rotation. The housing 4, the bottom shell 6 and the mounting base 7 are all designed with sealing grooves for sealing.

[0046] The working process of the present invention:

[0047] When the rotary scanning imaging unit 3 rotates, the circumferential cross-sectional area of the damping unit 2 is very small, and the scanning cross-sectional area does not change during the image scanning process, so the rotational motion resistance is very small; when vibrating, the upper and lower surface areas of the damping unit 2 are very large, and the damping liquid 5 cannot flow smoothly in the staggered circular hole spaces on the upper and lower surfaces of the damping unit 2, forming turbulence. The movement resistance of the up and down vibration is very large, which consumes the energy of the vibration, thereby suppressing the vibration and improving the imaging quality of the image scanning.

[0048] This application can be widely applied to high-quality image acquisition for multiple image scanning devices in various fields. For example, it can perform size recognition, edge extraction, text and crack recognition, and assembly tasks at different angles while stationary, obtain stable data acquisition of dynamic targets within the detection area at different angles, and perform high-quality image acquisition, photolithography, labeling, and other tasks at different angles. Compared with traditional scanning imaging systems, this invention can achieve high-quality 360° panoramic image acquisition with a single high-resolution camera, solving the jitter problem of existing image scanning and thus preventing the impact of vibration on image formation performance.

[0049] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A rotational vibration damping structure, characterized in that: include: A closed damping chamber (1), wherein the closed damping chamber (1) is filled with a damping liquid (5); A damping unit (2), wherein the damping unit (2) is arranged in a damping liquid (5) in a closed damping chamber (1); the damping unit (2) is capable of performing undamped rotation in the damping liquid (5); the damping unit (2) is capable of performing damped motion perpendicular to a rotation plane in the damping liquid (5); the damping unit (2) comprises two damping plates fixedly connected to each other, the damping plates comprising an outer ring and an inner ring, the outer ring and the inner ring being connected via a transition section, and the inner ring being located below the outer ring; a plurality of through holes uniformly arranged along the circumferential direction are provided at the connection between the outer ring and the transition section; the through holes at relative positions on the upper and lower damping plates are staggered along the circumferential direction; A rotating connecting shaft (8) passes through the sealed damping chamber (1) and is sealedly connected to the sealed damping chamber (1); the rotating connecting shaft (8) is fixedly connected to the damping unit (2) and is used to drive the damping unit (2) to rotate in the damping liquid (5); an external device mounting seat is provided at the upper end of the rotating connecting shaft (8) for connecting an external device, and a fixed mounting seat is provided at the lower end.

2. The rotational vibration damping structure according to claim 1, characterized in that: The through holes on the outer ring are staggered relative to the through holes at the connection.

3. The rotational vibration damping structure according to claim 1 or 2, characterized in that: The inner ring is provided with a plurality of positioning holes evenly arranged along the circumferential direction. The positioning holes of the upper and lower damping plates are arranged opposite to each other, and the two damping plates are fixedly connected by bolts.

4. The rotational vibration damping structure according to claim 1, characterized in that: The sealed damping chamber (1) is surrounded by an outer shell (4) with an opening at one end and a bottom shell (6) sealedly connected to the outer shell (4), and the bottom shell (6) is sealedly mounted at the opening of the outer shell (4).

5. The rotational vibration damping structure according to claim 4, characterized in that: The outer shell (4) and the bottom shell (6) are both provided with through holes in the middle thereof, and the positions of the through holes are opposite to each other. The rotary connecting shaft (8) passes through the through holes in the middle of the outer shell (4) and the bottom shell (6) and penetrates the closed damping cavity (1). The inner sides of the through holes of the outer shell (4) and the bottom shell (6) are both provided with a plurality of sealing grooves, and sealing rings are provided in the sealing grooves for sealing the outer shell (4) and the bottom shell (6) and the rotary connecting shaft (8).

6. A rotating optical imaging system, characterized in that: The invention comprises a rotary scanning imaging unit (3), a base (7) and a rotary vibration-damping damping structure according to any one of claims 1 to 5; the rotary scanning imaging unit (3) is mounted on the upper end of a rotary connecting shaft (8), and the outer shell (4) and the bottom shell (6) of the rotary vibration-damping damping structure are mounted on the base (7).

7. The rotating optical imaging system according to claim 6, characterized in that: The bottom shell (6) comprises an outer ring and an inner ring, the outer ring is connected to the inner ring via a transition section, and the inner ring is located below the outer ring; a plurality of sealing grooves are provided on the inner and outer sides of the inner ring, and sealing rings are provided in the sealing grooves.

8. The rotational optical imaging system according to claim 7, wherein: A mounting hole is provided in the middle of the base (7), and the inner ring of the bottom shell (6) is arranged in the mounting hole of the base (7) and is sealed by a sealing ring; an outward extending section is provided at the opening of the outer shell (4) for fixing the outer shell (4) on the base (7).

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