Damping system and damper
By cross-configuring the damper pairs and clamping mechanism, the problem of platform offset and torsion caused by the torsion of the helical spring was solved, achieving stable support for high-precision instruments and improving the vibration isolation effect of the damping system.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- WUHAN GLORY ROAD PRECISION TECH CO LTD
- Filing Date
- 2024-11-07
- Publication Date
- 2026-05-15
AI Technical Summary
In the vibration system of high-precision instruments, the positional movement and torque of the helical spring affect the vibration isolation performance, causing the stage to shift and twist, which is difficult to effectively suppress with existing technology.
The system employs a cross-configured damper pair with helical springs rotating in opposite directions. The helical springs are stabilized by a clamping mechanism and a vertical lifting mechanism to prevent torsion. The combination of the clamping mechanism and the vertical lifting mechanism ensures the stability of the platform.
It effectively suppressed the offset and torsion of the platform, and improved the stability and vibration isolation performance of the vibration reduction system.
Smart Images
Figure CN2024130555_15052026_PF_FP_ABST
Abstract
Description
Vibration reduction system and vibration damper Technical Field
[0001] This disclosure relates to a vibration damper and a vibration damping system including the vibration damper. Background Technology
[0002] In high-precision instruments such as scanning electron microscopes and electron microscopes, vibration damping systems are typically installed to passively reduce vibration in critical components. These vibration systems use metal springs such as helical springs and leaf springs to absorb and filter vibrations.
[0003] Summary of the Invention
[0004] This disclosure provides a vibration damper capable of suppressing load shift and deflection, and a vibration damping system including the vibration damper.
[0005] At least one embodiment of this disclosure provides a vibration damping system, comprising: a platform; and two pairs of vibration dampers configured to support the platform; each pair of vibration dampers includes two vibration dampers, each vibration damper including a first spring support, a second spring support, a helical spring located between the first spring support and the second spring support, and a vertical lifting mechanism located on the side of the second spring support away from the helical spring; the first spring support is fixedly connected to the platform; the line connecting the centers of the two vibration dampers in each pair on the platform is the center line connecting the vibration dampers; the two vibration damper pairs... The center lines of the dampers intersect each other, and the helical springs of the two dampers in each damper pair have opposite directions of rotation. In each damper, at least one of the first spring support and the second spring support includes a recess, one end of the helical spring is received in the recess, and the inner circumferential surface of the recess is inclined relative to the axial direction of the helical spring. The damper also includes a clamping mechanism, which includes: an insertion portion that inserts into the inner circumferential surface of the recess and the helical spring; and a fixing portion that applies a clamping force to the insertion portion along the axial direction of the helical spring. The thickness of the insertion portion decreases as it is inserted into the recess towards the insertion portion.
[0006] In addition, in the vibration damping system of at least one embodiment of this disclosure, the insertion part includes an inclined surface that fits against the inner circumferential surface and a limiting arc surface that abuts against the helical spring, wherein the plane of the limiting arc surface is parallel to the axial direction of the helical spring.
[0007] In addition, in the vibration damping system of at least one embodiment of the present disclosure, the second spring support includes a platform connected to the recess, the platform being perpendicular to the axial direction of the helical spring, and the damper further includes a fastening adjustment member, the fixing part being formed as a flange connected to the insertion part, the fastening adjustment member being configured to fix the fixing part to the platform and be able to adjust the distance between the fixing part and the platform.
[0008] Furthermore, in the vibration damping system of at least one embodiment of this disclosure, the clamping mechanism is in the form of a ring with a notch.
[0009] In addition, in the vibration reduction system of at least one embodiment of the present disclosure, a through hole is formed on the fixing part, and a threaded hole corresponding to the through hole is formed on the platform. The fastening adjustment member passes through the through hole and is fixed with the threaded hole.
[0010] In addition, in the vibration damping system of at least one embodiment of the present disclosure, in each damper, the end of the helical spring that contacts the first spring support includes a winding start position, and the winding start positions of the two helical springs of the two dampers in each damper pair are 180° apart.
[0011] In addition, in the vibration reduction system of at least one embodiment of this disclosure, the vertical lifting mechanism includes: a base; a lower arm assembly connected to the base and including a first lower arm and a second lower arm, wherein a first end of the first lower arm is rotatably connected to a first end of the second lower arm; an upper arm assembly connected to a second spring support seat and including a first upper arm and a second upper arm, wherein a first end of the first upper arm is rotatably connected to a first end of the second upper arm, a second end of the first upper arm is hinged to a second end of the first lower arm to form a first hinge portion, and a second end of the second upper arm is hinged to a second end of the second lower arm to form a second hinge portion; and a horizontal drive mechanism connected to the first hinge portion and the second hinge portion respectively, and configured to adjust the distance between the first hinge portion and the second hinge portion to change the vertical distance between the base and the second spring support seat.
[0012] In addition, in the vibration damping system of at least one embodiment of this disclosure, the vertical lifting mechanism includes: a screw arranged along the axial direction of the helical spring; and a nut threadedly engaged with the screw, wherein the second spring support includes a through hole through which the screw passes, and the second spring support is nested on the screw and supported by the nut.
[0013] In addition, in the vibration damping system of at least one embodiment of this disclosure, a hole extending in the horizontal direction is formed on the second spring support, and a set screw that abuts against the screw is installed in the hole.
[0014] In addition, in the vibration damping system of at least one embodiment of this disclosure, the helical spring includes two support coils located at both ends and tightly closed, and an effective coil located between the two support coils. Each support coil includes at least one spring coil, and the effective coil includes at least three spring coils. Both ends of the helical spring include ground surfaces, and the ratio of the center circumference of the ground surface to the center circumference of the spring coil in the helical spring is greater than or equal to 0.5.
[0015] At least one embodiment of this disclosure also provides a vibration damper, which includes a first spring support, a second spring support, a helical spring located between the first spring support and the second spring support, and a vertical lifting mechanism located on the side of the second spring support away from the helical spring. At least one of the first spring support and the second spring support includes a recess, one end of the helical spring is received in the recess, and the inner circumferential surface of the recess is inclined relative to the axial direction of the helical spring. The vibration damper also includes a clamping mechanism, which includes: an insertion portion inserted between the inner circumferential surface of the recess and the helical spring; and a fixing portion that applies a clamping force to the insertion portion along the axial direction of the helical spring. The thickness of the insertion portion decreases as it is inserted into the recess towards the insertion portion.
[0016] In addition, in the damper of at least one embodiment of the present disclosure, the insertion part includes an inclined surface that fits against the inner circumferential surface and a limiting arc surface that abuts against the coil spring, the plane of the limiting arc surface being parallel to the axial direction of the coil spring.
[0017] In addition, in the damper of at least one embodiment of the present disclosure, the second spring support includes a platform connected to the recess, the platform being perpendicular to the axial direction of the coil spring, and the damper also includes a fastening adjustment member, the fixing part being formed as a flange connected to the insertion part, the fastening adjustment member being configured to fix the fixing part to the platform and be able to adjust the distance between the fixing part and the platform.
[0018] In addition, in the damper of at least one embodiment of this disclosure, the clamping mechanism is in the form of a ring with a notch.
[0019] In addition, in the damper of at least one embodiment of the present disclosure, a through hole is formed on the fixing part, and a threaded hole corresponding to the through hole is formed on the platform. The fastening adjustment member passes through the through hole and is fixed with the threaded hole.
[0020] In addition, in the shock absorber of at least one embodiment of this disclosure, the vertical lifting mechanism includes: a base; a lower arm assembly connected to the base and including a first lower arm and a second lower arm, wherein a first end of the first lower arm is rotatably connected to a first end of the second lower arm; an upper arm assembly connected to a second spring support seat and including a first upper arm and a second upper arm, wherein a first end of the first upper arm is rotatably connected to a first end of the second upper arm, a second end of the first upper arm is hinged to a second end of the first lower arm to form a first hinge portion, and a second end of the second upper arm is hinged to a second end of the second lower arm to form a second hinge portion; and a horizontal drive mechanism connected to the first hinge portion and the second hinge portion respectively, and configured to adjust the distance between the first hinge portion and the second hinge portion to change the vertical distance between the base and the second spring support seat.
[0021] In addition, in the vibration damper of at least one embodiment of the present disclosure, the vertical lifting mechanism includes: a screw arranged along the axial direction of the helical spring; and a nut threadedly engaged with the screw, wherein the second spring support includes a through hole through which the screw passes, and the second spring support is nested on the screw and supported by the nut.
[0022] In addition, in the damper of at least one embodiment of the present disclosure, a hole extending in the horizontal direction is formed on the second spring support, and a set screw that abuts against the screw is installed in the hole.
[0023] In addition, in the damper of at least one embodiment of the present disclosure, the helical spring includes two support rings located at both ends and tightly closed, and an effective ring located between the two support rings. Each support ring includes at least one spring ring, and the effective ring includes at least three spring rings. Both ends of the helical spring include ground surfaces, and the ratio of the center circumference of the ground surface to the center circumference of the spring ring in the helical spring is greater than or equal to 0.5.
[0024] The aforementioned vibration reduction system and dampers can suppress load shifting and deflection. Attached Figure Description
[0025] Figure 1 is a perspective view of the overall structure of a vibration reduction system according to an embodiment of the present disclosure.
[0026] Figure 2 is a top view of a vibration reduction system according to an embodiment of the present disclosure.
[0027] Figure 3 is a side view of the overall structure of the damper 3 according to an embodiment of the present disclosure.
[0028] Figure 4 is a perspective view of the helical spring mounting mechanism 4 according to an embodiment of the present disclosure.
[0029] Figure 5 is a cross-sectional perspective view of the helical spring mounting mechanism 4 according to an embodiment of the present disclosure.
[0030] Figure 6 is a perspective view of the clamping mechanism 44 according to an embodiment of the present disclosure.
[0031] Figure 7 is a perspective view of the helical spring 43 according to an embodiment of the present disclosure.
[0032] Figure 8 is a perspective view of the vertical lifting mechanism 5 according to an embodiment of the present disclosure.
[0033] Figure 9 is a cross-sectional view of the vertical lifting mechanism 5 according to an embodiment of this disclosure.
[0034] Figure 10 is a perspective view of another structure of the vibration reduction system of the modified example of this disclosure.
[0035] Figure 11 is a cross-sectional view of another structure of the damper 3 in the modified example of this disclosure.
[0036] Figure 12 is a perspective view of another structure of the clamping mechanism 44 according to an embodiment of the present disclosure.
[0037] Figure Labeling Explanation: 1. Base; 2. Platform; 3. Vibration Damper; 31. First Vibration Damper Pair; 32. Second Vibration Damper Pair; 301, 302, 303, 304. Vibration Damper; 301a, 303a. Winding Start Position; 4. Helical Spring Mounting Mechanism; 41. First Spring Support; 42. Second Spring Support; 421. Recess; 422. Inner Circumferential Surface; 423. Protrusion; 43. Helical Spring; 431. Ground Surface; 44. Clamping Mechanism; 441. Insertion Part; 442. Fixing Part; 443. Notch; 444. Through Hole; 445. Limiting Arc Surface; 5. Vertical Lifting Mechanism; 51. Base; 52. Lower Arm Assembly; 521. First Lower Arm; 522. Second Lower Arm; 53. Upper Arm Assembly; 531. First Upper Arm; 532. Second Upper Arm; 54. Horizontal Drive Mechanism (Screw) 55: First hinge part; 56: Second hinge part; 57: Nut; 6: Vertical lifting mechanism; 61: Screw; 62: Nut; 63: Limiting component; 64: Set screw; 44a: First part; 44b: Second part; X: Axial direction. Detailed Implementation
[0038] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. Based on the described embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.
[0039] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as “comprising” or “including” mean that an element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects.
[0040] In existing vibration systems, helical springs are commonly used to absorb and filter vibrations. However, when using helical springs, the movement and offset of the spring position, as well as the torque generated when the spring is preloaded, can affect the vibration isolation performance. In the field of ultra-precision vibration reduction, this effect is even more significant.
[0041] To address this, this disclosure provides a vibration damping system comprising: a platform; and two pairs of vibration dampers configured to support the platform; each pair of vibration dampers includes two vibration dampers, each vibration damper comprising a first spring support, a second spring support, a helical spring located between the first spring support and the second spring support, and a vertical lifting mechanism located on the side of the second spring support away from the helical spring; the first spring support is fixedly connected to the platform; the line connecting the centers of the two vibration dampers in each pair on the platform is the center line connecting the vibration dampers; and the two vibration dampers in the two pairs of vibration dampers... The connecting lines intersect each other, and the helical springs of the two dampers in each damper pair have opposite directions of rotation. In each damper, at least one of the first spring support and the second spring support includes a recess, one end of the helical spring is received in the recess, and the inner circumferential surface of the recess is inclined relative to the axial direction of the helical spring. The damper also includes a clamping mechanism comprising: an insertion portion inserted between the inner circumferential surface of the recess and the helical spring; and a fixing portion that applies a clamping force to the insertion portion along the axial direction of the helical spring. The thickness of the insertion portion decreases as it is inserted toward the recess.
[0042] In the vibration damping system provided in this embodiment, when the helical spring absorbs vibration and is compressed or released, the helical spring will twist along its rotational circumference. If the helical springs of the two dampers in a damper pair have the same direction of rotation, the two helical springs will generate the same direction of twist, which will cause the platform to twist accordingly. Therefore, by making the helical springs of the two dampers in a damper pair have opposite directions of rotation, the twists generated on the helical springs of the two dampers can be canceled out, thereby preventing the platform from twisting as a whole and achieving the stability of the entire vibration damping system. In addition, the clamping mechanism described above can clamp and fix the helical spring in the horizontal direction and prevent the helical spring itself from twisting, thereby further suppressing the overall displacement or twisting of the platform.
[0043] The vibration reduction system and vibration damper provided in the embodiments of this disclosure will now be described in detail with reference to the accompanying drawings.
[0044] Figure 1 is a perspective view of the overall structure of a vibration reduction system according to an embodiment of the present disclosure.
[0045] As shown in Figure 1, the vibration damping system includes a base 1, a stage 2, and multiple vibration dampers 3. The multiple vibration dampers 3 are fixedly mounted on the base 1 and support the stage 2 to keep it horizontal. The stage 2 is used to support the load of high-precision instruments such as scanning electron microscopes and electron microscopes.
[0046] The vibration damping system includes at least two pairs of dampers 31 and 32. The line connecting the centerlines of the orthographic projections of each pair of dampers 31 and 32 onto the platform 2 is designated as the damper center line, and these damper center lines intersect each other. Therefore, multiple dampers 3 can be used to provide stable support for the platform 2.
[0047] Each damper 3 is a damper that includes a coil spring. The specific structure of the damper 3 will be described in detail later. The coil springs in each damper 3 are of the same shape.
[0048] For example, in a pair of dampers, the coil springs of the two dampers 3 have opposite directions of rotation.
[0049] When a helical spring absorbs vibration and is compressed or released, it twists along its rotational circumference. If the helical springs of the two dampers in a damper pair have the same direction of rotation, they will both produce the same direction of twist, which will cause the platform 2 to twist accordingly. Therefore, by making the helical springs of the two dampers 3 in a damper pair have opposite directions of rotation, the twists generated on the helical springs of the two dampers 3 can be canceled out, thereby preventing the platform 2 from twisting as a whole and achieving the stability of the entire damping system.
[0050] More preferably, in a pair of dampers, the starting positions of the coil springs of the two dampers 3 are 180° apart. Here, the starting position of the coil spring refers to the starting position of the coil spring at the end closest to the platform 2.
[0051] By making the starting positions of the two coil springs of the two dampers 3 in a pair of dampers 3 differ by 180°, the torsion that occurs on the two coil springs can be better canceled out, thereby further suppressing the overall torsion of the platform 2 when the coil springs absorb vibration.
[0052] Figure 2 is a top view of a vibration damping system according to an embodiment of the present disclosure, illustrating an embodiment of the configuration relationship of multiple vibration dampers relative to the platform in the vibration damping system.
[0053] In the embodiment shown in Figure 2, the platform 2 is rectangular, and two pairs of vibration dampers 31 and 32 are arranged at the four corners of the platform 2, for a total of four vibration dampers 301 to 304. Vibration dampers 301 and 303 constitute the first vibration damper pair 31, and vibration dampers 302 and 304 constitute the second vibration damper pair 32. The two vibration dampers 301 and 303 in the first vibration damper pair are centrally symmetrical with respect to the center of the platform 2. The two vibration dampers 302 and 304 in the second vibration damper pair are also centrally symmetrical with respect to the center of the platform 2. The line connecting the centers of the first and second vibration damper pairs intersects each other. In the first vibration damper pair, the coil spring of vibration damper 301 rotates counterclockwise, and the coil spring of vibration damper 303 rotates clockwise. The starting position 301a of the coil spring of vibration damper 301 and the starting position 303a of the coil spring of vibration damper 303 differ by 180°. Meanwhile, the configuration of dampers 302 and 304 in the second damper pair is the same as that of the first damper pair.
[0054] It should be noted that the vibration damping system of this disclosure is not limited to the embodiment shown in FIG2. The platform 2 can be formed into other shapes as needed, and more than two pairs of vibration dampers can be configured. The configuration position of each vibration damper is not limited to the four corners of the rectangle, as long as it can stably support the platform 2.
[0055] Figure 3 is a side view of the overall structure of the damper 3 according to an embodiment of the present disclosure.
[0056] As shown in Figure 3, the shock absorber 3 includes a helical spring mounting mechanism 4 and a vertical lifting mechanism 5. The vertical lifting mechanism 5 is mounted on the base 1. The helical spring mounting mechanism 4 is mounted on the vertical lifting mechanism 5 and supports the platform 2.
[0057] Figure 4 is a perspective view of the helical spring mounting mechanism 4 according to an embodiment of the present disclosure, and Figure 5 is a cross-sectional perspective view of the helical spring mounting mechanism 4 according to an embodiment of the present disclosure.
[0058] As shown in Figures 4 and 5, the helical spring mounting mechanism 4 includes a first spring support 41, a second spring support 42, and a helical spring 43 located between the first spring support 41 and the second spring support 42. The first spring support 41 is fixedly connected to the lower part of the platform 2 to support the platform 2. The second spring support 42 is mounted above the vertical lifting mechanism 5.
[0059] In this embodiment, the first spring support 41 and the second spring support 42 have the same structure. The following description will take the structure of the second spring support 42 as an example.
[0060] As shown in Figure 5, a recess 421 is formed in the second spring support 42, and one end of the helical spring 43 is accommodated in the recess 421. The bottom surface of the recess 421 is formed as a plane that abuts against the end face of the helical spring 43. The inner circumferential surface 422 of the recess 421 is inclined relative to the axial direction X of the helical spring 43.
[0061] Alternatively, a protrusion 423 can be formed within the recess 421 to embed inside the coil spring 43, forming an annular groove to accommodate one end of the coil spring 43. This allows for a more stable installation of the coil spring 43 and prevents it from moving horizontally.
[0062] A clamping mechanism 44 for clamping the helical spring 43 is mounted on the second spring support 42. FIG6 is a perspective view of the clamping mechanism 44 according to an embodiment of the present disclosure. As shown in FIG6, the clamping mechanism 44 is annular with a notch 443. The clamping mechanism 44 includes an insertion part 441 and a fixing part 442.
[0063] As shown in Figure 5, the insertion part 441 is inserted between the inner peripheral surface 422 of the recess 421 and the coil spring 43. Furthermore, the radial thickness of the insertion part 441 decreases as it moves toward the direction in which it is inserted into the recess 421.
[0064] In this embodiment of the present disclosure, when viewed from the side as shown in FIG. 5, the outer peripheral surface of the insertion portion 441, which is in contact with the inner peripheral surface 422 of the recess 421, is inclined relative to the axial direction X of the coil spring 43, and its inclination angle is the same as that of the inner peripheral surface 422 of the recess 421. The inner peripheral surface of the insertion portion 441, which abuts against the coil spring 43, becomes a limiting arc surface 445 for limiting the coil spring 43. This limiting arc surface 445 is parallel to the axial direction X of the coil spring 43.
[0065] Furthermore, when viewed from the side, the shape of the insertion portion 441 is not limited to the shape described above. For example, the insertion portion 441 may also be formed such that both the outer peripheral surface and the limiting arc surface are inclined relative to the axial direction X of the coil spring 43.
[0066] When viewed from the side, the insertion part 441 can also be formed such that its outer peripheral surface is parallel to the axial direction X of the coil spring 43, while the limiting arc surface is inclined relative to the axial direction X of the coil spring 43.
[0067] When viewed from the side, the insertion part 441 may also be formed such that at least one of the outer peripheral surface and the limiting arc surface is stepped or curved.
[0068] In addition, in the clamping mechanism 44, the fixing part 442 is used to apply a clamping force to the insertion part 441 along the axial direction X of the helical spring 43.
[0069] In this embodiment of the present disclosure, as shown in Figures 5 and 6, the fixing part 442 is a flange extending from the outer periphery of the insertion part 441. A through hole 444 in the shape of an elongated hole is formed on the fixing part 442. As shown in Figure 5, a platform 424 is formed on the outer periphery of the recess 421 of the second spring support 42, and this platform 424 is perpendicular to the axial direction X of the coil spring 43. When the insertion part 441 is inserted between the inner peripheral surface 422 of the recess 421 and the coil spring 43, the lower surface of the flange serving as the fixing part 442 faces the platform 424 of the second spring support 42. A threaded hole (not shown) corresponding to the through hole 444 on the fixing part 442 is also formed on the platform 424. By passing a screw, which serves as a fastening adjustment member 45, through the through hole 444 and screwing it into the threaded hole, the distance between the lower surface of the fixing part 442 and the platform 424 can be adjusted.
[0070] Furthermore, the structure for applying clamping force to the insertion part 441 is not limited to the above-described manner; for example, clamping force can also be applied by other means such as setting a clamp.
[0071] As shown in Figure 5, when the fixing part 442 is pressed against the second spring support seat 42 by tightening the screw that serves as the fastening adjustment member 45, the insertion part 441 is subjected to pressing force from the inner peripheral surface 422 of the recess 421. Since the clamping mechanism 44 is annular with a notch 443, the clamping mechanism 44 can contract and deform, thereby clamping the coil spring 43 from all sides using the limiting arc surface 445. As a result, the coil spring 43 can be stably clamped and fixed, preventing the coil spring 43 from shifting when deformed under force, and also suppressing the coil spring 43 from twisting itself. Furthermore, it can suppress the shifting or twisting on the damper, thereby suppressing the shifting or twisting of the platform 2.
[0072] Figure 7 is a perspective view of the helical spring 43 according to an embodiment of the present disclosure.
[0073] As shown in Figure 7, the helical spring 43 preferably includes support coils located at both ends and tightly closed, and an effective coil located between the two support coils.
[0074] More preferably, the support ring includes at least one spring ring, and the effective ring includes at least three spring rings.
[0075] By having support rings at both ends of the coil spring 43, the number of support rings at the ends of the coil spring 43 can be increased. Furthermore, when the coil spring 43 is clamped using the clamping mechanism 44, the insertion portion 441 of the clamping mechanism 44 can abut against the support rings of the coil spring 43. This allows for a more stable clamping of the coil spring 43.
[0076] By including at least three effective coils in the helical spring 43, load offset can be reduced.
[0077] Furthermore, each end of the helical spring 43 includes a ground surface 431, which is perpendicular to the axial direction X of the helical spring 43. When viewed along the axial direction X of the helical spring, the ratio of the center circumference of the ground surface 431 to the center circumference of the spring coil in the helical spring 43 is greater than or equal to 0.5. Alternatively, the ratio of the center circumference of the ground surface 431 to the center circumference of the spring coil in the helical spring 43 can also be 0.7 to 0.8, or it can be 0.75.
[0078] By forming ground surfaces 431 at both ends of the helical spring 43, and making the ratio of the center circumference of the ground surface 431 to the center circumference of the spring coil in the helical spring 43 greater than or equal to 0.5, the helical spring 43 can be stably supported on the first spring support seat 41 and the second spring support seat 42, and the helical spring 43 can be stably installed in a vertical state.
[0079] Figure 8 is a perspective view of the vertical lifting mechanism 5 according to an embodiment of the present disclosure, and Figure 9 is a cross-sectional view of the vertical lifting mechanism 5 according to an embodiment of the present disclosure.
[0080] The vertical lifting mechanism 5 includes a base 51, a lower arm assembly 52, an upper arm assembly 53, and a horizontal drive mechanism 54.
[0081] The lower arm assembly 52 includes a first lower arm 521 and a second lower arm 522, with a first end of the first lower arm 521 and a first end of the second lower arm 522 rotatably connected relative to the base 51. Gears are formed at the first ends of the first lower arm 521 and the second lower arm 522, respectively, and they roll and mesh with each other. This allows the first lower arm 521 and the second lower arm 522 to rotate synchronously relative to the base 51.
[0082] The upper arm assembly 53 includes a first upper arm 531 and a second upper arm 532, with a first end of the first upper arm 531 and a first end of the second upper arm 532 rotatably connected relative to a second spring support 42. Gears are formed at the first ends of the first upper arm 531 and the second upper arm 532, respectively, and mesh with each other. This allows the first upper arm 531 and the second upper arm 532 to rotate synchronously relative to the second spring support 42.
[0083] The second end of the first upper arm 531 is hinged to the second end of the first lower arm 521, forming a first hinge portion 55. The second end of the second upper arm 532 is hinged to the second end of the second lower arm 522, forming a second hinge portion 56. By forming the first hinge portion 55 and the second hinge portion 56, the first upper arm 531 and the first lower arm 521, as well as the second upper arm 532 and the second lower arm 522, can rotate relative to each other.
[0084] The horizontal drive mechanism 54 is connected to the first hinge portion 55 and the second hinge portion 56 respectively, and is configured to adjust the distance between the first hinge portion 55 and the second hinge portion 56 to change the vertical distance between the base 51 and the second spring support 42.
[0085] In this embodiment, the horizontal drive mechanism 54 includes a horizontally arranged screw. A through hole is formed in the first hinge portion 55 for the screw to pass through, and a nut 57 is formed in the second hinge portion 56 to thread with the screw 54. The screw passes through the through hole in the first hinge portion 55 and is screwed into the nut 57 in the second hinge portion 56. By rotating the screw 54, the distance between the first hinge portion 55 and the second hinge portion 56 can be adjusted. When the distance between the first hinge portion 55 and the second hinge portion 56 changes, the first lower arm 521 and the second lower arm 522 of the lower arm assembly 52 and the first upper arm 531 and the second upper arm 532 of the upper arm assembly 53 rotate accordingly, thereby changing the vertical distance between the base 51 and the second spring support 42. Therefore, the vertical height of the vertical lifting mechanism 5 can be adjusted by rotating the screw 54. Furthermore, by using the vertical lifting mechanism 5 of the above structure to adjust the vertical height, the second spring support 42 can move vertically relative to the base 51 without twisting, thereby preventing the helical spring and the platform 2 from twisting during the height adjustment process.
[0086] It should be noted that the above-mentioned horizontal drive mechanism 54 is not limited to a screw-based adjustment structure, as long as it can adjust the distance between the first hinge part 55 and the second hinge part 56.
[0087] Furthermore, the structure of the vibration reduction system and vibration damper of the present disclosure embodiments is not limited to the above embodiments, and may also be formed into other structures.
[0088] Figure 10 is a perspective view of another structure of the vibration damping system according to a modification of this disclosure. Figure 11 is a cross-sectional view of another structure of the vibration damper 3 according to a modification of this disclosure.
[0089] As shown in Figure 10, multiple vibration dampers 3 are arranged between the base 1 and the platform 2. As shown in Figure 11, the vibration damper 3 includes a vertical lifting mechanism 6. The vertical lifting mechanism 6 includes a screw 61 and a nut 62.
[0090] The screw 61 is positioned along the axial direction X of the helical spring 43 and fixed to the base 1 of the vibration damping system. The nut 62 is threadedly engaged with the screw 61. By rotating the nut 62, the position of the nut 62 on the screw 61 can be adjusted, that is, the height of the nut 62 relative to the base 1 can be adjusted.
[0091] A through hole is formed in the center of the second spring support 42 for the screw 61 to pass through. The second spring support 42 is nested on the screw 61 and supported by the nut 62. Thus, the height of the second spring support 42 relative to the base 1 can be adjusted by rotating the nut 62.
[0092] In addition, it is preferable that a hole extending in the horizontal direction is formed on the second spring support 42. By installing a set screw 64 that abuts against the screw 61 in the hole, the second spring support 42 can be prevented from wobbling in the horizontal direction relative to the screw 61, thereby preventing the helical spring 43 and the platform 2 from shifting.
[0093] Alternatively, it is preferable to provide a limiting component 63 at the upper end of the screw 61, which is used to limit the range of movement of the first spring support 41 in the vertical direction.
[0094] The vertical lifting mechanism 6 described above provides stable support to the platform 2 while preventing the helical spring 43 and the platform 2 from shifting or deflecting. Furthermore, since the screw 61 passes through the second spring support 42 and the helical spring 43, the vertical installation space can be further reduced.
[0095] Furthermore, the clamping mechanism of this disclosure is not limited to the structure described above; for example, it can also be formed as shown in FIG12. FIG12 is a perspective view of another structure of the clamping mechanism 44 according to an embodiment of this disclosure.
[0096] As shown in Figure 12, the clamping mechanism 44 is composed of a first part 44a and a second part 44b, which are separate parts. The first part 44a and the second part 44b are each semi-circular and can be elastically deformed.
[0097] When the distance between the first part 44a and the second part 44b of the clamping mechanism 44 and the platform 424 of the second spring support is adjusted by the fastening adjustment member 45, the insertion part of the first part 44a and the second part 44b is deformed by the pressure of the inner peripheral surface 422 of the recess 421, thereby shrinking the inner diameter formed by the first part 44a and the second part 44b, and clamping and fixing the helical spring 43.
[0098] It should be noted that the clamping mechanism 44 is not limited to being composed of only two parts, but may also be composed of more parts. Moreover, the shape of the clamping mechanism 44 is not limited to being ring-shaped, as long as it can clamp and fix the helical spring 43.
[0099] The embodiments described above are merely exemplary structures and are not intended to limit the scope of protection of this disclosure. Those skilled in the art can modify, add to, and combine the structures of the various embodiments as needed.
Claims
1. A vibration damping system, comprising: Platform; as well as Two pairs of vibration dampers are configured to support the platform; Each damper pair includes two dampers, and each damper includes a first spring support, a second spring support, a helical spring located between the first spring support and the second spring support, and a vertical lifting mechanism located on the side of the second spring support away from the helical spring. The first spring support is fixedly connected to the platform. The line connecting the centers of the two dampers in each damper pair on the platform is the damper center line. These two damper center lines intersect each other. The coil springs of the two dampers in each damper pair have opposite directions of rotation. In each of the aforementioned dampers, at least one of the first spring support and the second spring support includes a recess, one end of the helical spring is received in the recess, and the inner circumferential surface of the recess is inclined relative to the axial direction of the helical spring. The shock absorber further includes a clamping mechanism, which comprises: an insertion portion inserted between the inner circumferential surface of the recess and the helical spring, and a fixing portion that applies a clamping force to the insertion portion along the axial direction of the helical spring. The thickness of the insertion portion decreases as it is inserted into the recess.
2. The vibration reduction system according to claim 1, wherein, The insertion part includes an inclined surface that fits against the inner circumferential surface and a limiting arc surface that abuts against the helical spring, wherein the plane of the limiting arc surface is parallel to the axial direction of the helical spring.
3. The vibration reduction system according to claim 1 or 2, wherein, The second spring support includes a platform connected to the recess, the platform being perpendicular to the axial direction of the helical spring. The vibration damper also includes a fastening adjustment member, wherein the fixing part is formed as a flange connected to the insertion part, and the fastening adjustment member is configured to fix the fixing part to the table surface and is capable of adjusting the distance between the fixing part and the table surface.
4. The vibration reduction system according to claim 3, wherein, The clamping mechanism is a ring with a notch.
5. The vibration reduction system according to claim 3 or 4, wherein, A through hole is formed on the fixing part, and a threaded hole corresponding to the through hole is formed on the platform. The fastening adjustment member passes through the through hole and is fixed with the threaded hole.
6. The vibration reduction system according to any one of claims 1 to 5, wherein, In each of the dampers, the end of the helical spring that contacts the first spring support includes a winding start position, and the winding start positions of the two helical springs of the two dampers in each damper pair are 180° apart.
7. The vibration reduction system according to any one of claims 1 to 6, wherein, The vertical lifting mechanism includes: Base; The lower arm assembly is connected to the base and includes a first lower arm and a second lower arm, wherein a first end of the first lower arm is rotatably connected to a first end of the second lower arm; The upper arm assembly is connected to the second spring support seat and includes a first upper arm and a second upper arm. The first end of the first upper arm is rotatably connected to the first end of the second upper arm. The second end of the first upper arm is hinged to the second end of the first lower arm to form a first hinge portion. The second end of the second upper arm is hinged to the second end of the second lower arm to form a second hinge portion. A horizontal drive mechanism is connected to the first hinge portion and the second hinge portion respectively, and is configured to adjust the distance between the first hinge portion and the second hinge portion to change the vertical distance between the base and the second spring support.
8. The vibration reduction system according to any one of claims 1 to 6, wherein, The vertical lifting mechanism includes: A screw arranged axially along the helical spring; and A nut that mates with the screw thread. The second spring support includes a through hole through which the screw passes, and the second spring support is nested on the screw and supported by the nut.
9. The vibration reduction system according to claim 8, wherein, A hole extending horizontally is formed on the second spring support, and a set screw that abuts against the screw is installed in the hole.
10. The vibration reduction system according to any one of claims 1 to 9, wherein, The helical spring includes two support coils located at both ends and tightly closed, and an effective coil located between the two support coils. Each support coil includes at least one spring coil, and the effective coil includes at least three spring coils. The two ends of the helical spring each include a ground surface, and the ratio of the center circumference of the ground surface to the center circumference of the spring coil in the helical spring is greater than or equal to 0.
5.
11. A vibration damper, comprising a first spring support, a second spring support, a helical spring located between the first spring support and the second spring support, and a vertical lifting mechanism located on the side of the second spring support away from the helical spring. in, At least one of the first spring support and the second spring support includes a recess, one end of the helical spring is received in the recess, and the inner circumferential surface of the recess is inclined relative to the axial direction of the helical spring. The shock absorber further includes a clamping mechanism, which comprises: an insertion portion inserted between the inner circumferential surface of the recess and the helical spring, and a fixing portion that applies a clamping force to the insertion portion along the axial direction of the helical spring. The thickness of the insertion portion decreases as it is inserted into the recess.
12. The vibration damper according to claim 11, wherein, The insertion part includes an inclined surface that fits against the inner circumferential surface and a limiting arc surface that abuts against the helical spring, wherein the plane of the limiting arc surface is parallel to the axial direction of the helical spring.
13. The vibration damper according to claim 11 or 12, wherein, The second spring support includes a platform connected to the recess, the platform being perpendicular to the axial direction of the helical spring. The vibration damper also includes a fastening adjustment component. The fixing part is formed as a flange connected to the insertion part. The fastening adjustment member is configured to fix the fixing part to the table surface and is capable of adjusting the distance between the fixing part and the table surface.
14. The vibration damper according to claim 13, wherein, The clamping mechanism is a ring with a notch.
15. The vibration damper according to claim 13 or 14, wherein, A through hole is formed on the fixing part, and a threaded hole corresponding to the through hole is formed on the platform. The fastening adjustment member passes through the through hole and is fixed with the threaded hole.
16. The vibration damper according to any one of claims 11 to 15, wherein, The vertical lifting mechanism includes: Base; The lower arm assembly is connected to the base and includes a first lower arm and a second lower arm, wherein a first end of the first lower arm is rotatably connected to a first end of the second lower arm; The upper arm assembly is connected to the second spring support seat and includes a first upper arm and a second upper arm. The first end of the first upper arm is rotatably connected to the first end of the second upper arm. The second end of the first upper arm is hinged to the second end of the first lower arm to form a first hinge portion. The second end of the second upper arm is hinged to the second end of the second lower arm to form a second hinge portion. A horizontal drive mechanism is connected to the first hinge portion and the second hinge portion respectively, and is configured to adjust the distance between the first hinge portion and the second hinge portion to change the vertical distance between the base and the second spring support.
17. The vibration damper according to any one of claims 11 to 15, wherein, The vertical lifting mechanism includes: A screw arranged axially along the helical spring; and A nut that mates with the screw thread. The second spring support includes a through hole through which the screw passes, and the second spring support is nested on the screw and supported by the nut.
18. The vibration reduction system according to claim 17, wherein, A hole extending horizontally is formed on the second spring support, and a set screw that abuts against the screw is installed in the hole.
19. The vibration damper according to any one of claims 11 to 18, wherein, The helical spring includes two support coils located at both ends and tightly closed, and an effective coil located between the two support coils. Each support coil includes at least one spring coil, and the effective coil includes at least three spring coils. Both ends of the helical spring include ground surfaces, and the center circumference of the ground surfaces is equal to that of the spring in the helical spring. The ratio of the center circumference of the circle to the center circumference is greater than or equal to 0.5.