An axial vibration reduction device for single-screen translational volume display

Abstract

The present invention discloses an axial vibration reduction device for single-screen translational volumetric display. The image screen component is hingedly installed by a crank and a rolling bearing, and the image screen component is U-shaped; a vibration reduction bracket is provided between the two branches of the U-shaped image screen component, and the vibration reduction bracket and the image screen component are connected by a vibration reduction wheel mechanism; the vibration reduction bracket includes a connecting plate and a bracket group at the two branches; each bracket group includes an outer and inner support plate, and the vibration reduction wheel mechanism and the outer and inner support plates are rollingly connected; the vibration reduction wheel mechanism includes a central bearing, a roller shaft, a positioning device, an end cover, a connecting fork and a vibration reduction wheel, and the vibration reduction wheel and the outer support plate / inner support plate are rollingly contacted. The present invention realizes the axial constraint of the image screen component in the translational scanning true three-dimensional volumetric display device, reduces the axial vibration and noise of the image screen mechanism when the single-screen translational volumetric display device is running at high speed, and has the characteristics of strong stability, low vibration noise, simple structure, convenient debugging and simple maintenance.

Description

Technical Field

[0001] The present invention relates to a single-screen translation mechanical vibration reduction device and method in the field of mechanical vibration, and in particular to a mechanical axial vibration reduction device and method for single-screen translation volume display under high-speed motion conditions. Background Art

[0002] The disclosed single-screen translational volume display device image screen component is referred to patent CN108769663A.

[0003] The advantage is that it allows voxels of uniform size and uniform distribution, is suitable for accurate display of three-dimensional images and achieves inertial force balance, and has a larger duty cycle of display space and display time.

[0004] The disadvantage is that the image screen component makes circular translation in the direction of the side plane of the image screen component. Since the middle part of the device is used to place the optical projection device fixed to the frame, the image screen component can only adopt a hollow "U"-shaped structure, which makes it difficult to form axial constraints; and the image screen component is only installed on the crank through 4 rolling bearings. The rolling bearings can provide good support in the radial direction, but the constraints in the axial direction are not strict, especially the amplitude of the lower middle part of the image screen component is the largest, which will generate vibration and noise under high-speed operation. Summary of the Invention

[0005] In order to overcome the problems existing in the background technical field, the purpose of the present invention is to provide an axial vibration reduction method for a single-screen translational volumetric display, so as to improve the stability of the single-screen translational volumetric display device in actual use and solve the problem of axial vibration of the single-screen translational volumetric display device.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] The present invention includes a crank, a rolling bearing, and an image screen component; the two ends of the image screen component are hingedly installed by the crank and the rolling bearing, and the image screen component is U-shaped; it also includes a vibration-damping bracket and a vibration-damping wheel mechanism, and a vibration-damping bracket is arranged between the two branches of the U-shape of the image screen component, and the vibration-damping bracket is arranged across the two branches of the U-shape of the image screen component, and each end of the vibration-damping bracket and the image screen component are connected by a vibration-damping wheel mechanism.

[0008] The axial direction mentioned in the present invention refers to the axial direction of the rotation axis when the screen component rotates.

[0009] The vibration-damping bracket includes a connecting plate and two bracket groups; the two bracket groups are respectively arranged at the two branches of the U-shape of the image screen component, and the two bracket groups are connected into one by the connecting plate; each bracket group includes an outer support plate and an inner support plate, and the outer support plate and the inner support plate are respectively arranged on both sides of the component plate / component cross beam at one end of the U-shape of the image screen component, and a vibration-damping wheel mechanism is installed on the component plate / component cross beam at one end of the U-shape of the image screen component, and the vibration-damping wheel mechanism and the outer support plate and the inner support plate are respectively connected in a rolling manner.

[0010] The vibration-damping wheel mechanism includes a center bearing, a roller shaft, a positioning device, an end cover, a connecting fork and a vibration-damping wheel; the bottom of the connecting fork is fixed on one end of the U-shape of the image screen component, and a through hole parallel to the axial direction is opened on the upper part of the connecting fork. The roller shaft is movably sleeved in the through hole through the center bearing and an end cover is set for axial positioning installation. Grooves are opened at both ends of the roller shaft so that the ends of both ends of the roller shaft form a U shape. Both ends of the small shaft are supported and installed in the inner holes opened on the two branches of the U shape at the two ends of the roller shaft through the positioning device so that the installation position can be adjusted. At the same time, the vibration-damping wheel is movably sleeved on the outside of the middle part of the small shaft through the plastic-coated bearing, and the vibration-damping wheel and the outer support plate / inner support plate are connected in rolling contact.

[0011] The positioning device is a bolt, which passes through the hole at the end of the small shaft and is inserted into the threaded hole of the branch part at the end of the roller shaft.

[0012] The small shaft is parallel to the axial direction, and the installation position of the small shaft along the axial direction can be adjusted by a positioning device, thereby generating different axial pressures to be applied to the outer support plate / inner support plate.

[0013] The present invention is a single-screen translation volume display device with an image screen component fixedly connected to a set of vibration-damping wheel mechanisms, and inner and outer support plates fixedly connected to the frame of the single-screen translation volume display device are respectively installed on both sides of the vibration-damping wheel mechanism. The support plates are in close contact with the vibration-damping wheel mechanism to generate axial pressure, so that the image screen component is axially constrained.

[0014] The vibration-damping wheel mechanism is bolted to the image screen. It primarily consists of a connecting fork, a roller shaft, a center bearing on the roller shaft, and a plastic-coated bearing arranged perpendicularly to the center bearing, forming a symmetrical structure. The roller shaft is mounted in the axial hole of the connecting fork, and the center bearing is coaxially mounted on the roller shaft. The plastic-coated bearing is arranged perpendicularly to the center bearing and mounted on the roller shaft via a small shaft.

[0015] Axial pressure is generated by adjusting the position of the plastic-coated bearing of the vibration damping wheel mechanism during installation using a positioning device. The close contact between the plastic-coated bearing and the inner and outer support plates of the vibration damping bracket generates axial pressure. A slight eccentricity between the plastic-coated bearing and the center bearing creates a certain torque when the vibration damping wheel mechanism moves in a circular motion with the image screen counterweight, ensuring that the plastic-coated bearing always moves in the same direction as the image screen component.

[0016] The vibration-damping wheel of the present invention is fixed on the image screen component of the single-screen translation volume display device, and performs circular translation along with the image screen component; the vibration-damping bracket is fixed to the frame of the single-screen translation volume display device; the inner and outer support plates of the vibration-damping bracket are distributed on both sides of the vibration-damping wheel, and are in axial contact with the vibration-damping wheel to generate constraints.

[0017] The present invention utilizes a positioning device to adjust the position of a plastic-coated bearing in a vibration-damping wheel mechanism, thereby achieving close contact between the plastic-coated bearing and the inner and outer support plates of a vibration-damping bracket, thereby realizing axial constraint on the image screen component in a translational scanning true three-dimensional volumetric display device, and reducing the axial vibration and noise of the image screen mechanism when a single-screen translational volumetric display device is running at high speed.

[0018] The present invention has the following beneficial effects:

[0019] The present invention uses a vibration-damping wheel mechanism and a vibration-damping bracket to add an axial constraint between the image screen component and the frame of the single-screen translational volume display device. This will overcome the problem of poor rigidity caused by using bearings alone for axial constraint, thereby significantly reducing the vibration of the mechanism and thus reducing the operating noise of the mechanism. It has good application prospects in the field of vibration reduction of single-screen translational volume display.

[0020] The invention has the characteristics of strong stability, low vibration noise, simple structure, convenient debugging and simple maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is an axial vibration reduction device used for single-screen translational volume display.

[0022] Figure 2 It is a schematic diagram of the structure of an axial vibration reduction device used for single-screen translational volume display.

[0023] Figure 3 It is a structural schematic diagram of the vibration-eliminating wheel mechanism in the present invention.

[0024] Figure 4 It is a structural schematic diagram of the vibration-damping bracket in the present invention.

[0025] In the figure: 1. crank, 2. rolling bearing, 3. image screen component, 4. frame, 5. optical projection equipment, 6. vibration-absorbing wheel mechanism, 7. vibration-damping bracket, 8. center bearing, 9. roller shaft, 10. positioning device, 11. small shaft, 12. plastic-coated bearing, 13. end cover, 14. connecting fork, 15. connecting plate, 16. outer support plate, 17. inner support plate. DETAILED DESCRIPTION

[0026] The present invention will be further described below with reference to the accompanying drawings and examples.

[0027] like Figure 2-Figure 3As shown, the device includes a crank 1, a rolling bearing 2, a screen component 3, a vibration-absorbing wheel mechanism 6, a vibration-absorbing bracket 7, a center bearing 8, a roller shaft 9, a positioning device 10, a small shaft 11, a plastic-coated bearing 12, an end cover 13, a connecting fork 14, a connecting plate 15, an outer support plate 16 and an inner support plate 17.

[0028] like Figure 1 As shown, the two ends of the image screen member 3 are hingedly mounted via a crank 1 and a rolling bearing 2, forming a U-shaped image screen member 3. Components such as an optical projection device 5, such as a projector, are mounted within the U-shaped image screen member 3, and a display screen is disposed on the outer surface of the central portion of the U-shaped image screen member 3. One end of the crank 1 is connected to the frame 4 via a bearing, while the other end is connected to the image screen member 3 via a rolling bearing 2. Typically, driven by a power input device such as a motor, the crank 1 rotates at high speed around the end connected to the frame 4, thereby driving the image screen member 3, which is connected to the other end of the crank 1, to perform a high-speed circular translation rotation. During this high-speed rotation, the interface displayed on the display screen changes, thereby achieving volumetric display. Because the optical projection device 5, which is fixed to the frame 4, is mounted within the U-shaped image screen member 3, if the lower end of the image screen member 3 is directly connected to form an axial constraint during the circular translation of the image screen member 3, interference with the optical projection device 5 will occur during movement.

[0029] Specifically, both ends of the image screen member 3 are mounted via identical hinge assemblies. Each hinge assembly includes a crank 1 and a rolling bearing 2. One end of the crank 1 is hinged to a hole in the side of the image screen member 3 via the rolling bearing 2, while the other end is hinged to a fixed hinge. This allows both ends of the image screen member 3 to form a parallelogram-shaped rotational connection through their respective two hinge assemblies. The frame 4, crank 1, and image screen member 3 constitute a double crank mechanism, in which the image screen member 3 serves as the connecting rod.

[0030] It is characterized in that it also includes a vibration-damping bracket 7 and a vibration-damping wheel mechanism 6. The vibration-damping bracket 7 is arranged between the two U-shaped branches of the image screen component 3, and the vibration-damping bracket 7 is arranged across the two U-shaped branches of the image screen component 3. Each end of the vibration-damping bracket 7 and the image screen component 3 are connected through the vibration-damping wheel mechanism 6.

[0031] The vibration-damping bracket 7 includes a connecting plate 15 and two bracket groups; the two bracket groups are respectively arranged at the two branch parts of the U-shaped image screen component 3, and the two bracket groups are connected into one by a connecting plate 15 that spans the two ends of the image screen component 3; at each end of the U-shaped image screen component 3, each bracket group includes an outer support plate 16 and an inner support plate 17, and the outer support plate 16 and the inner support plate 17 are respectively arranged on both sides of the component plate / component crossbeam at one end of the U-shaped image screen component 3, and a vibration-damping wheel mechanism 6 is installed on the component plate / component crossbeam at one end of the U-shaped image screen component 3, and the vibration-damping wheel mechanism 6 and the outer support plate 16 and the inner support plate 17 are respectively connected in a rolling manner.

[0032] Specifically, the outer support plates 16 and the inner support plates 1 of the two bracket groups are connected into one body via the connecting plate 15 .

[0033] The vibration-damping wheel mechanism 6 includes a central bearing 8, a roller shaft 9, a positioning device 10, an end cover 13, a connecting fork 14 and a vibration-damping wheel; the bottom of the connecting fork 14 is fixed on the component plate / component crossbeam at one end of the U-shaped image screen component 3, and a through hole parallel to the axial direction, that is, parallel to the line connecting the two ends of the U-shaped image screen component 3, is opened on the upper part of the connecting fork 14. The roller shaft 9 is movably sleeved in the through hole through the central bearing 8 and an end cover 13 is set for axial positioning installation. Grooves are opened at both ends of the roller shaft 9 so that the ends of both ends of the roller shaft 9 form a U shape. Both ends of the small shaft 11 are supported and installed in the inner holes opened on the two branches of the П-shape at the ends of the roller shaft 9 through the positioning device 10 in an adjustable installation position. At the same time, the vibration-damping wheel is movably sleeved on the outside of the middle part of the small shaft 11 through the plastic-coated bearing 12, and the vibration-damping wheel and the outer support plate 16 / inner support plate 17 are connected in rolling contact.

[0034] The positioning device 10 can be a bolt, which passes through the hole at the end of the small shaft 11 and is inserted into the threaded hole of the branch portion at the end of the roller shaft 9.

[0035] The small shaft 11 is parallel to the axial direction, that is, parallel to the line connecting the two ends of the U-shaped image screen component 3. The installation position of the small shaft 11 along the axial direction can be adjusted by the positioning device 10, thereby generating different axial pressures applied to the outer support plate 16 / inner support plate 17 to achieve the adjustment of the axial vibration damping pressure.

[0036] Figure 3 This is a schematic diagram of the structure of the vibration damping wheel mechanism 6 of the present invention. It primarily comprises a connecting fork 14, a roller shaft 9, a center bearing 8 located on the roller shaft 9, and a plastic-coated bearing 12 arranged perpendicularly to the center bearing 8, forming a symmetrical structure. The roller shaft 9 is mounted in the axial hole of the connecting fork 14, and the center bearing 8 is mounted coaxially with the roller shaft 9. The plastic-coated bearing 12 is arranged with its axial direction perpendicular to that of the center bearing 8 and is mounted to the roller shaft 9 via a small shaft 11.

[0037] Figure 4 This is a schematic diagram of the structure of the vibration-damping bracket 7 in the present invention. Because the vibration-damping wheel mechanism 6 moves in a circular translation with the image screen member 3, and the inner and outer support plates 17 and 16 need to maintain close contact with the vibration-damping wheel mechanism and provide axial pressure, both inner and outer support plates 17 and 16 are machined into annular shapes to reduce weight and facilitate installation. The inner and outer support plates 16, 7, and 16 are secured to the frame via bolts.

[0038] The working process principle of the present invention is:

[0039] The image screen component 3 makes circular translation through the crank 2. A vibration-damping wheel mechanism 6 is fixed to the image screen component 3. The outer support plate 16 and the inner support plate 17 are fixed to the frame through bolts. The outer support plate 16 and the inner support plate 17 are distributed on both sides of the vibration-damping wheel mechanism 6 and are in close contact with the vibration-damping wheel mechanism 6 to generate axial pressure, so that the image screen component 3 is axially constrained, thereby reducing the axial shaking of the image screen component 3 under high-speed operation.

[0040] Furthermore, the constraint adopted by the present invention avoids the optical projection device in space, and the optical path is not affected. Therefore, the present invention realizes the axial constraint of the image screen component without affecting the imaging effect of the single-screen translational bitmap volume display device.

[0041] In the specific implementation, the small shaft 11 is positioned in the shaft hole of the roller shaft 9 by the positioning device 10, and then the plastic-coated bearing 12 installed on the small shaft 11 is positioned in the axial direction of the roller shaft 9, thereby generating axial pressure on the inner and outer support plates 16, 17 and the vibration-damping wheel mechanism 6.

[0042] There is a slight eccentricity between the plastic-coated bearing 12 and the center bearing 8. When the vibration-damping wheel mechanism 6 moves in a circular motion with the image screen component 3, a certain torque is generated to ensure that the plastic-coated bearing 12 always moves in the same direction as the vibration-damping wheel mechanism 6.

Claims

1. An axial vibration reduction device for single-screen translational volume display, comprising a crank (1), a rolling bearing (2), and an image screen component (3); both ends of the image screen component (3) are hingedly mounted via the crank (1) and the rolling bearing (2), and the image screen component (3) is U-shaped; and is characterized in that: It also includes a vibration-damping bracket (7) and a vibration-damping wheel mechanism (6), wherein the vibration-damping bracket (7) is arranged between two U-shaped branches of the image screen component (3), and the vibration-damping bracket (7) is arranged across the two U-shaped branches of the image screen component (3), and each end of the vibration-damping bracket (7) and the image screen component (3) are connected via the vibration-damping wheel mechanism (6); The vibration-damping bracket (7) includes a connecting plate (15) and two bracket groups; the two bracket groups are respectively arranged at two branches of the U-shape of the image screen component (3), and the two bracket groups are connected into one body through the connecting plate (15); each bracket group includes an outer support plate (16) and an inner support plate (17), and the outer support plate (16) and the inner support plate (17) are respectively arranged on both sides of the component plate / component crossbeam at one end of the U-shape of the image screen component (3), and a vibration-damping wheel mechanism (6) is installed on the component plate / component crossbeam at one end of the U-shape of the image screen component (3), and the vibration-damping wheel mechanism (6) and the outer support plate (16) and the inner support plate (17) are respectively connected in a rolling manner.

2. The axial vibration reduction device for single-screen translational volume display according to claim 1, characterized in that: The vibration-damping wheel mechanism (6) includes a central bearing (8), a roller shaft (9), a positioning device (10), an end cover (13), a connecting fork (14) and a vibration-damping wheel; the bottom of the connecting fork (14) is fixed on one end of the U-shaped image screen component (3); a through hole parallel to the axial direction is provided on the upper part of the connecting fork (14); the roller shaft (9) is movably sleeved in the through hole through the central bearing (8) and an end cover (13) is provided for axial positioning installation; grooves are provided at both ends of the roller shaft (9), so that the ends of both ends of the roller shaft (9) form a U shape; both ends of the small shaft (11) are supported and installed in the inner holes opened on the two branches of the U shape at the ends of the roller shaft (9) through the positioning device (10) in an adjustable installation position; at the same time, the vibration-damping wheel is movably sleeved on the outside of the middle part of the small shaft (11) through the plastic-coated bearing (12); the vibration-damping wheel and the outer support plate (16) / inner support plate (17) are connected in rolling contact.

3. The axial vibration reduction device for single-screen translational volume display according to claim 2, characterized in that: The positioning device (10) is a bolt, which passes through the hole at the end of the small shaft (11) and is inserted into the threaded hole of the branch portion at the end of the roller shaft (9).

4. The axial vibration reduction device for single-screen translational volume display according to claim 2, characterized in that: The small shaft (11) is parallel to the axial direction, and the installation position of the small shaft (11) along the axial direction can be adjusted by the positioning device (10), thereby generating different axial pressures applied to the outer support plate (16) / inner support plate (17).

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