Four-degree-of-freedom large load overturning moment damper

Abstract

The application provides a four-degree-of-freedom large-load overturning moment damper, which comprises a shell, a screw cover, a central shaft and a retaining member; the shell extends along a first axis; the screw cover is arranged on the top of the shell to form a first space between the screw cover and the shell; the central shaft is elastically connected to the shell and coaxially arranged with the shell, and one end of the central shaft penetrates through the screw cover; the retaining member is sleeved on the central shaft, and when the screw cover is arranged on the top of the shell, the retaining member is compressed in the first space to provide a counterforce for the central shaft when the central shaft is subjected to a radial external force; the retaining member of the application controls the degree of freedom of the central shaft, provides a counterforce for the central shaft, ensures the moment balance of the central shaft, and makes the damper have no torsional degree of freedom, thereby having the ability to resist equipment overturning.

Description

Technical Field

[0001] This invention relates to a vibration damper, and more particularly to a four-degree-of-freedom vibration damper that resists large load overturning moment. Background Technology

[0002] When equipment is installed at an angle (such as equipment at sea, which will roll or pitch under the action of waves), the equipment is subject to gravity, and the installation axis of the equipment will deviate from the initial installation axis. When the angle of tilt is too large, as shown in the attached... Figure 1 As shown, the equipment may tip over and cause an accident, mainly because the shock absorbers at the bottom are not strong enough to resist overturning moments.

[0003] Therefore, there is an urgent need for a four-degree-of-freedom vibration damper capable of withstanding large overturning moments, such as the attached... Figure 2 As shown, the movable part of this vibration damper is the central shaft, which has four degrees of freedom: translation in the X, Y, and Z directions, and rotation γ. The structural design of the vibration damper ensures that the central shaft does not possess the degrees of freedom α and β for rotation around the horizontal direction. Thus, as shown in the attached diagram… Figure 3 As shown, when the equipment tilts, the equipment's axis is basically aligned with the initial axis, thus the shock absorber has the function of preventing the equipment from overturning. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a four-degree-of-freedom vibration damper for resisting large load overturning moments. By restricting the damper to only four degrees of freedom, it achieves the function of preventing equipment overturning. The technical solution adopted by this invention is as follows:

[0005] A four-degree-of-freedom vibration damper for resisting large load overturning moment includes

[0006] The housing extends along the first axis;

[0007] A screw cap is disposed on the top of the housing so that a first space is formed between the screw cap and the housing;

[0008] The central shaft is flexibly connected to the housing and arranged coaxially with the housing, with one end passing through the screw cap;

[0009] A retainer, fitted onto the central shaft, is pressed into a first space when the screw cap is positioned on top of the housing, such that the retainer provides a support reaction force to the central shaft when it is subjected to a radial external force.

[0010] Furthermore, the retaining element includes

[0011] The torque holding part includes a first torque holding body, a second torque holding body and a third torque holding body arranged sequentially along a first axis, and the torque holding part is provided with a shaft hole that matches the central axis through it axially.

[0012] Further, the second moment retaining body is radially provided with a friction passage communicated with the shaft hole;

[0013] The retaining member further comprises

[0014] The vertical damping providing part comprises a clamp and a friction plate, the friction plate is arranged in the friction passage, and the clamp is connected to the friction plate so that the friction plate is tightly attached to the cylindrical surface of the central shaft.

[0015] Further, the retaining member further comprises

[0016] The lateral damping providing part comprises a disc spring and a baffle, the baffle is arranged between the third moment retaining body and the top surface of the shell, and the disc spring is arranged between the third moment retaining body and the baffle.

[0017] When the retaining member is compressed in the first space, the top surface of the first moment retaining body is tightly attached to the inner top surface of the screw cap, and the bottom surface of the baffle is tightly attached to the top surface of the shell.

[0018] Further, the bottom of the third moment retaining body is provided with a stepped surface so that a damping adjustment gap is formed between the stepped surface and the shell, and the baffle is arranged in the damping adjustment gap.

[0019] The bottom of the third moment retaining body is provided with an annular groove connected to the stepped surface, and the disc spring is arranged in the annular groove.

[0020] Further, a first lateral rubber for providing lateral stiffness is arranged in the first space.

[0021] Further, the inner surface upper side and the inner surface lower side of the first lateral rubber are respectively provided with protrusions, and the first moment retaining body and the third moment retaining body are respectively in contact with the protrusions.

[0022] Further, the bottom of the shell is provided with a bottom cover so that a second space is formed in the shell.

[0023] The second space is provided with

[0024] The impact resisting part is used for resisting the lateral and vertical impact of the shock absorber.

[0025] The cylindrical spring is connected between the bottom cover and the central shaft so that the central shaft elastically moves along the first axis.

[0026] Further, the impact resisting part comprises a top rubber, a bottom rubber and a second lateral rubber arranged in sequence along the first axis, and the top rubber, the bottom rubber and the second lateral rubber are coaxially arranged.

[0027] One end of the center shaft extends between the top rubber and the bottom rubber, and the second lateral rubber is located outside the center shaft.

[0028] Further, a height adjustment bolt is arranged on the bottom cover along the first axis and in sliding connection, one end of the cylindrical spring abuts against the height adjustment bolt.

[0029] The height adjustment bolt is internally threadedly connected with a height adjustment nut, one end of the height adjustment nut is in rotary connection with the bottom cover.

[0030] The advantages of the present application are:

[0031] The retaining member controls the degree of freedom of the center shaft, provides a reaction force for the center shaft, ensures torque balance of the center shaft, so that the shock absorber has no torsional degree of freedom, thereby having the ability to resist equipment overturning.

[0032] The retaining member integrates torque balance, provides vertical damping and lateral damping, and is tightly fitted in the first space, so that the shock absorber has high compactness and further compresses the volume of the shock absorber. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 It is a force schematic diagram of equipment installed in the prior art.

[0034] Figure 2 It is a four-degree-of-freedom schematic diagram of the shock absorber in the present application.

[0035] Figure 3 It is a force schematic diagram of equipment installed in the present application.

[0036] Figure 4 It is a front view of the present application.

[0037] Figure 5 It is an anti-overturning force diagram of the center shaft in the present application.

[0038] Figure 6 It is a perspective view of the retaining member in the present application.

[0039] Figure 7 It is a front view of the retaining member in the present application.

[0040] In the figure: 1 - shell, 2 - screw cover, 3 - center shaft, 31 - inner hole, 32 - center shaft seat, 4 - retaining member, 41 - torque retaining part, 41a - first torque retaining body, 41b - second torque retaining body, 41c - third torque retaining body, 42 - clamp, 43 - lateral damping providing part, 43a - disc spring, 43b - baffle, 5 - first lateral rubber, 6 - bottom cover, 7 - cylindrical spring, 8 - top rubber, 9 - bottom rubber, 10 - second lateral rubber, 11 - height adjustment bolt, 12 - height adjustment nut, 13 - guide column. DETAILED DESCRIPTION

[0041] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0042] This invention provides a four-degree-of-freedom vibration damper for resisting large load overturning moment, comprising a housing 1, a screw cap 2, a central shaft 3, and a retainer 4; the housing 1 extends along a first axis; the screw cap 2 is disposed on the top of the housing 1 such that a first space is formed between the screw cap 2 and the housing 1; the central shaft 3 is elastically connected to the housing 1 and arranged coaxially with the housing 1, with one end passing through the screw cap 2; the retainer 4 is sleeved on the central shaft 3, and when the screw cap 2 is disposed on the top of the housing 1, the retainer 4 is pressed into the first space such that the retainer 4 provides a support reaction force for the central shaft 3 when the central shaft 3 is subjected to a radial external force.

[0043] In one specific embodiment, as shown in the appendix Figure 4 As shown, the screw cap 2 is threadedly connected to the housing 1; as the screw cap 2 is screwed downwards, the first space is gradually compressed until the position of the retainer 4 within the first space is fixed. At this time, the upper end face of the retainer is in close contact with the inner top surface of the screw cap 2, and the lower end face of the retainer is in close contact with the top surface of the housing 1. When the central shaft 3 is subjected to a horizontal outward external force, as shown in the attached figure... Figure 5 As shown, housing 1 provides an upward support force, screw cap 2 provides a downward support force, and retainer 4 provides a horizontal inward support force, which is balanced with the external force on central shaft 3.

[0044] In addition, the housing 1, screw cap 2, and retainer 4 are all metal parts. The torsional angle of the central axis caused by the external torque is very small. Therefore, the central axis can be approximately understood as having only translational motion in the up, down, left, right, front, and back directions, without rotation along the first axis, that is, no torsional degree of freedom.

[0045] In practical use, when the load is applied to the vibration damper and it is installed at an angle, because the vibration damper has no torsional degree of freedom, it has a high ability to resist equipment overturning, and the effect is as follows: Figure 3 As shown, compared to conventional vibration dampers, the axial deflection angle of the central axis of this vibration damper is almost zero, thus giving it a strong ability to resist equipment overturning.

[0046] The retaining member 4 described in this application specifically includes a torque retaining part 41, a vertical damping providing part 42, and a lateral damping providing part 43;

[0047] Specifically, the torque holding part 41 includes a first torque holding body 41a, a second torque holding body 41b and a third torque holding body 41c arranged sequentially along the first axis. The torque holding part 41 is axially provided with a shaft hole that matches the central shaft 3, and the second torque holding body 41b is radially provided with a friction channel that communicates with the shaft hole.

[0048] Specifically, the vertical damping providing part 42 includes a clamp 42a and a friction plate 42b. The friction plate 42b is disposed in the friction channel, and the clamp 42a is connected to the friction plate 42b so that the friction plate 42a is tightly fitted to the cylindrical surface of the central shaft 3.

[0049] Specifically, the lateral damping providing part 43 includes a disc spring 43a and a baffle 43b, the baffle 43b being located between the third torque holding body 41c and the top surface of the housing 1, and the disc spring 43a being disposed between the third torque holding body 41c and the baffle 43b;

[0050] When the retainer 4 is pressed into the first space, the top surface of the first torque retainer 41a is in close contact with the inner top surface of the screw cap 2, and the bottom surface of the baffle 43b is in close contact with the top surface of the housing 1.

[0051] In one specific embodiment, as shown in the appendix Figure 6 and 7 As shown, the retaining member 4 integrates torque retention, vertical damping provision, and lateral damping provision into one unit, with a high degree of integration, eliminating the need for separate installation space for vertical and lateral damping. The torque retention part 41 is an integrally formed structure, ensuring its own strength while providing an installation carrier for the vertical damping provision part 42 and the lateral damping provision part 43. When the screw cap 2 is screwed into place, the height of the first space is equal to the overall height of the retaining member 4, so that there is no gap in the height direction in the first space, the overall height of the shock absorber is compressed, and the volume of the shock absorber is further reduced.

[0052] In this embodiment, there are two clamps 42a and two friction plates 42b. The two friction plates 42b are respectively arranged in two friction channels. The clamps 42a bypass the second torque retainer 41b, and their two ends are respectively clamped to the two clamps 42a. The clamps 42a are pre-tightened to shrink and tighten the two friction plates 42b radially, thereby pressing the central shaft 3 radially. The central shaft 3 and the friction plates 42b are perpendicular (i.e., attached) in the vertical direction. Figure 2 The Z-axis (in the middle) forms a friction pair, causing the central axis 3 to move vertically (i.e., attached) Figure 2 When the Z-axis is in the middle, it provides frictional damping force to the central axis 3; changing the outer radius or wire diameter of the clamp 42a can change the coefficient of friction.

[0053] In this embodiment, when the screw cap 2 is screwed down to compress the first space, the disc spring 43a undergoes elastic deformation. The disc spring 43a presses the baffle 43b vertically against the top surface of the housing 1, thereby causing the central shaft 3 to move laterally (i.e., attached). Figure 2 When moving in the X and Y directions, it provides frictional damping force to the central axis 3; changing the thickness of the disc spring 43a can change the preload, and thus change the lateral frictional damping force.

[0054] In this embodiment, as shown in the appendix Figure 7 As shown, the bottom of the third torque retaining body 41c is provided with a stepped surface so that a damping adjustment gap is formed between the stepped surface and the housing 1, and the baffle 43b is disposed in the damping adjustment gap; the bottom of the third torque retaining body 41c is provided with an annular groove connected to the stepped surface, and the disc spring 43a is disposed in the annular groove.

[0055] Since the torque holding part 41 is an integrally formed structure, the stepped surface on the third torque holding body 41c can directly position and install the baffle 43b, and the annular groove can directly position the disc spring 43a. There is no need to design a positioning reference for the lateral damping part 43 separately, which further enables the torque holding part 41 to be assembled as an integral module.

[0056] In this application, a first transverse rubber 5 for providing transverse stiffness is also provided in the first space; the torque holding part 41 contacts the first transverse rubber 5 when the central shaft 3 is subjected to transverse impact, and the elastic deformation of the transverse rubber 5 provides buffering.

[0057] In one specific embodiment, please refer to the appendix. Figure 4 The first transverse rubber 5 has protrusions on the upper and lower sides of its inner surface, and the first torque retainer 41a and the third torque retainer 41c are in contact with the protrusions.

[0058] The first transverse rubber 5 is a rotating structure along the first axis, and its cross-sectional shape is shown in the attached figure. Figure 4 As shown, the two protrusions are displayed as tooth-like structures in the cross-sectional view. The two tips of the tooth-like structures are in contact with the outer circular surfaces of the first torque retainer 41a and the third torque retainer 41c, respectively. When the central shaft 3 is subjected to a lateral impact, the tooth-like structure of the first lateral rubber 5 is first compressed and deformed, providing impact resistance in the initial stage.

[0059] In this application, the bottom of the housing 1 is provided with a bottom cover 6 so that a second space is formed inside the housing 1; an impact-resistant part and a cylindrical spring 7 are provided in the second space; the impact-resistant part is used to resist the lateral and vertical impacts of the shock absorber; the cylindrical spring 7 is connected between the bottom cover 6 and the central shaft 3 so that the central shaft 3 can move elastically along the first axis.

[0060] The anti-impact part in the application comprises a top rubber 8, a bottom rubber 9 and a second transverse rubber 10 arranged sequentially along the first axis, and the top rubber 8, the bottom rubber 9 and the second transverse rubber 10 are coaxially arranged;

[0061] One end of the central shaft 3 extends to between the top rubber 8 and the bottom rubber 9, and the second transverse rubber 10 is located outside the central shaft 3.

[0062] In a specific embodiment, as shown in the accompanying drawings, the central shaft 3 has an inner hole 31 arranged from bottom to top along the first axis, and one end of the cylindrical spring 7 is hidden in the inner hole 31. When a load acts on the central shaft 3 during use, the central shaft 3 is provided with vertical stiffness due to the linear stiffness of the cylindrical spring 7. Figure 4 The bottom cover 6 is provided with a plurality of guide columns 13, and the height-adjusting bolt 11 is sleeved on the guide columns 13, so that the height-adjusting bolt 11 can only slide along the first axis and cannot rotate around the first axis. When the adjusting nut 12 is rotated by a screwdriver, the height-adjusting bolt 11 will rise and fall along the guide column 13, thereby changing the compression amount of the cylindrical spring 7, so as to be suitable for different loads.

[0063] In the application, the height-adjusting bolt 11 is arranged to slide along the first axis on the bottom cover 6, and one end of the cylindrical spring 7 abuts against the height-adjusting bolt; the height-adjusting bolt 11 is internally threadedly connected with a height-adjusting nut 12, and one end of the height-adjusting nut 12 is rotationally connected with the bottom cover 6.

[0064] In a specific embodiment, as shown in the accompanying drawings, the central shaft 3 has an inner hole 31 arranged from bottom to top along the first axis, and one end of the cylindrical spring 7 is hidden in the inner hole 31. When a load acts on the central shaft 3 during use, the central shaft 3 is provided with vertical stiffness due to the linear stiffness of the cylindrical spring 7. Figure 4 The bottom cover 6 is provided with a plurality of guide columns 13, and the height-adjusting bolt 11 is sleeved on the guide columns 13, so that the height-adjusting bolt 11 can only slide along the first axis and cannot rotate around the first axis. When the adjusting nut 12 is rotated by a screwdriver, the height-adjusting bolt 11 will rise and fall along the guide column 13, thereby changing the compression amount of the cylindrical spring 7, so as to be suitable for different loads.

[0065] In summary, the movable part of the application is the central shaft, and the central shaft has four degrees of freedom, so that the central shaft of the shock absorber does not have the degrees of freedom α and β of rotating around the horizontal direction. When the device is inclined, the axis of the device is basically consistent with the initial axis, so that the shock absorber has the function of resisting the overturning of the device.

[0066] Finally, it should be noted that the above detailed description is merely illustrative of the technical solutions of the present application and is not limiting, and although the present application has been described in detail with reference to the examples, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present application, and all should be covered in the scope of the claims of the present application.

Claims

1. A four degree of freedom antiroll moment damper characterized by: The utility model relates to a shock absorber, including a shell (1) extending along a first axis; a screw cap (2) arranged on the top of the shell (1) to form a first space between the screw cap (2) and the shell (1); a central shaft (3) elastically connected to the shell (1) and coaxially arranged with the shell (1), one end of the central shaft (3) penetrating the screw cap (2); a retaining member (4) sleeved on the central shaft (3), when the screw cap (2) is arranged on the top of the shell (1), the retaining member (4) is compressed in the first space to provide a reaction force for the central shaft (3) when the central shaft (3) is subjected to a radial external force; the retaining member (4) includes a torque retaining portion (41), a vertical damping providing portion (42), and a lateral damping providing portion (43); the torque retaining portion (41) is an integral structure, including a first torque retaining body (41a), a second torque retaining body (41b), and a third torque retaining body (41c) sequentially arranged along the first axis, the torque retaining portion (41) is axially provided with an axial hole matched with the central shaft (3), and the second torque retaining body (41b) is radially provided with a friction channel communicated with the axial hole; the vertical damping providing portion (42) includes a clamp (42a) and a friction plate (42b), the friction plate (42b) is arranged in the friction channel, and the clamp (42a) is connected to the friction plate (42b) to tightly adhere the friction plate (42a) to the cylindrical surface of the central shaft (3); the lateral damping providing portion (43) includes a disc spring (43a) and a baffle (43b), the baffle (43b) is located between the third torque retaining body (41c) and the top surface of the shell (1), and the disc spring (43a) is arranged between the third torque retaining body (41c) and the baffle (43b); when the retaining member (4) is compressed in the first space, the top surface of the first torque retaining body (41a) tightly adheres to the inner top surface of the screw cap (2), and the bottom surface of the baffle (43b) tightly adheres to the top surface of the shell (1).

2. The four-degree-of-freedom large-load-resisting overturning-moment damper according to claim 1, characterized by: the bottom of the third torque retaining body (41c) is provided with a stepped surface to form a damping adjustment gap between the stepped surface and the shell (1), and the baffle (43b) is arranged in the damping adjustment gap; the bottom of the third torque retaining body (41c) is provided with an annular groove connected with the stepped surface, and the disc spring (43a) is arranged in the annular groove.

3. The four-degree-of-freedom large-load-resisting overturning-moment damper according to claim 1, characterized by: a first lateral rubber (5) for providing lateral stiffness is further arranged in the first space.

4. The four-degree-of-freedom large-load-resisting overturning-moment damper according to claim 3, characterized by: the inner surface upper side and the inner surface lower side of the first lateral rubber (5) are respectively provided with protrusions, and the first torque retaining body (41a) and the third torque retaining body (41c) respectively contact the protrusions.

5. The four-degree-of-freedom large-load-resisting overturning-moment damper of claim 1, wherein: the bottom of the shell (1) is provided with a bottom cover (6) to form a second space in the shell (1); the second space is provided with an impact resistance portion for resisting lateral and vertical impacts of the shock absorber; a cylindrical spring (7) connected between the bottom cover (6) and the central shaft (3) to enable the central shaft (3) to elastically move along the first axis.

6. The four-degree-of-freedom large-load-resisting overturning-moment damper according to claim 5, characterized by: The anti-impact part comprises a top rubber (8), a bottom rubber (9) and a second transverse rubber (10) arranged coaxially along a first axis in sequence; One end of the central shaft (3) extends to between the top rubber (8) and the bottom rubber (9), and the second transverse rubber (10) is located outside the central shaft (3).

7. The four-degree-of-freedom large-load-resisting overturning-moment damper according to claim 5, characterized by: An adjusting bolt (11) is slidably arranged on the bottom cover (6) along the first axis, and one end of the cylindrical spring (7) abuts against the adjusting bolt; An adjusting nut (12) is threadedly connected in the adjusting bolt (11), and one end of the adjusting nut (12) is rotationally connected with the bottom cover (6).

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