CN217842516U

CN217842516U - Bottom vibration isolation device

Info

Publication number: CN217842516U
Application number: CN202222159965.8U
Authority: CN
Inventors: 季凡渝
Original assignee: Jiangsu Xinjienuo Environmental Engineering Technology Co ltd
Current assignee: Jiangsu Xinjienuo Environmental Engineering Technology Co ltd
Priority date: 2022-08-17
Filing date: 2022-08-17
Publication date: 2022-11-18
Anticipated expiration: 2032-08-17

Abstract

The utility model relates to a bottom vibration isolation device belongs to vibration damper technical field. The bottom surface of a base of the vibration isolation device is fixedly connected with a bottom plate, and the upper part of the base is provided with an upper cover through a screw pair; a coulomb damper is arranged between the base and the upper cover; the damper comprises a combined damping block tightly sleeved outside the central shaft, and the lower surface of the upper cover is pressed and held at the upper end of the combined damping block through a disc spring; a vertical output shaft penetrates through the central hole, and the lower section of the output shaft is fixedly connected with a friction disc in a close fit manner; the upper surface of the friction disc is provided with a lower disc elastic pad, and the lower surface of the friction disc is supported on the bottom plate through a lower conical spring; the lower end of the output shaft is fixed with an impact elastic pad, and the upper surface of the bottom plate is provided with a bottom plate elastic pad. The utility model discloses can produce the effect that the horizontal direction restraines the formant to basically keep the equilibrium of up-and-down displacement.

Description

Bottom vibration isolation device

Technical Field

The utility model relates to a vibration isolation device, especially a bottom vibration isolation device belong to vibration damper technical field.

Background

The Chinese patent document with the application number of 201410064307.8 discloses a low-coupling wall-mounted vibration isolator and a vibration isolator group, the vibration isolator comprises a shell and a central shaft, the central shaft is positioned in the center of the shell, the upper end of the central shaft extends out of the top of the shell, the lower end of the central shaft is not contacted with the shell, the outer edge of the lower part of the central shaft is provided with a step surface, the upper side and the lower side of the step surface are respectively provided with a cushion pad, and a conical spring, a cushion cylinder and a conical spring are sequentially arranged between the two cushion pads from top to bottom; the central shaft is limited by a conical spring and a conical spring, the outer ends of the conical spring and the conical spring are connected with the shell, and the inner ends of the conical spring and the conical spring are connected with the step surface of the central shaft; the buffer cylinder is connected with the step surface and a gap is reserved between the buffer cylinder and the shell; the upper part of the central shaft is provided with a damper which is supported on the shell through a belleville spring and a slip sheet. By changing the positions of the two conical springs, the central shaft connected with the wall hanging equipment can be extended forwards or retracted backwards for a required length in a static state, and the overturning moment generated by the wall hanging equipment can be balanced by utilizing the length difference, so that the coupling of vibration in all directions of the equipment is reduced.

However, the above patent solution lacks the effect of avoiding resonance, and with the development of vibration damping and isolation technology, the drawback that it is difficult to keep the up-and-down moving force of the two conical springs balanced is also revealed in practice.

Disclosure of Invention

The utility model aims to provide a: in view of the above-mentioned disadvantages of the prior art, a bottom vibration isolation device is provided by improving the structure, which can not only effectively suppress resonance but also substantially maintain the balance of the up-down moving force.

In order to achieve the above purpose, the utility model discloses a bottom vibration isolation mounting basic technical scheme does: the device comprises a cylindrical hollow base with an open upper surface, wherein the bottom surface of the base is fixedly connected with a bottom plate, and the upper part of the base is provided with an upper cover with a central hole on the upper surface through a screw pair; a coulomb damper is arranged between the upper surface of the base and the lower surface of the upper cover;

the coulomb damper comprises a combined damping block which is tightly sleeved outside the central shaft and has a wide upper part and a narrow lower part and is in an inverted frustum shape, and the lower surface of the upper cover is pressed and held at the upper end of the combined damping block through a disc spring;

a vertical output shaft with the bottom end positioned in the base penetrates through the central hole, and the upper end of the output shaft extends out of the upper cover and the lower section of the output shaft is tightly and fixedly connected with a friction disc; the upper surface of the friction disc is provided with a lower disc elastic pad, and the lower surface of the friction disc is supported on the bottom plate through a lower conical spring; the lower end of the output shaft is fixed with an impact elastic pad, and the upper surface of the bottom plate is provided with a bottom plate elastic pad positioned below the impact elastic pad.

In operation, work as the utility model discloses when horizontal reciprocating vibration appears in the vibration isolation device atress, lower conical spring uses the bottom to form swing rigidity as basis, upper end support center pin, and the base closes with the upper cover soon and makes coulomb attenuator produce horizontal damping, reaches the effect of horizontal direction's suppression formant. And when vertical reciprocating vibration occurs: when the acting force is downward, the small end of the disc spring slightly moves downward, and the large end expands outward, so that the upper end of the disc spring is tightened and the lower end of the disc spring is loosened slightly; when the acting force is upward, the small end of the disc spring slightly moves upward, the large end is retracted, the upper end is slightly loose, and the lower end is tightened, so that the balance of the up-and-down moving force is basically kept.

The utility model discloses further perfect is: the periphery of the bottom plate is provided with an annular boss extending upwards, and the excircle of the lower end of the lower conical spring is clamped in the annular boss.

The utility model discloses further perfection is again: the upper end face of the annular boss supports an elastic cylinder ring lined in the base.

The utility model discloses further perfect is: the combined damping block is wedged in a damping ring with an inner conical surface matched with the combined damping block, the bottom surface of the damping ring is borne on the top surface of the base through a gasket, and an elastic retainer ring spaced from the inner wall of the upper cover is sleeved outside the damping ring.

The utility model discloses still further perfect is: the lower surface of the upper cover is pressed and held at the upper end of the combined damping block through a friction plate, a pressing plate and a disc spring, a straight hole section with the inner diameter matched with the outer circle of the pressing plate is arranged on the inner conical surface of the damping ring, and a concave spigot bearing the outer edge of the friction plate is arranged on the straight hole section.

The utility model discloses still further perfect is: the lower end of the damping ring is provided with a positioning spigot embedded into the upper recess of the gasket.

The utility model discloses further perfection is again: and an insertion head of an impact elastic pad is inserted and fixed in a central hole at the lower end of the output shaft.

Finally, the further improvement is as follows: the upper cover dustcoat is equipped with the dust cover, the binding face middle part of dust cover and upper cover upper surface extends the back taper face big end up, the upper end of back taper face extends inwards with the cover capping face of center pin upper end parallel and level.

Drawings

The present invention will be further described with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.

Detailed Description

Example one

The present embodiment is a bottom vibration isolation device for large displacement of ship, its structure is shown in fig. 1, the bottom surface of the cylindrical hollow base 7 with an open upper surface is embedded and connected with a bottom plate 14, the upper part is installed with an upper cover 3 with a central hole on the upper surface through a screw pair, the bottom end is located on the upper end of the vertical central shaft 2 of the base 7 and passes through the upper cover and extends out from the central hole of the upper cover.

The lower section of the central shaft 3 is tightly and fixedly connected with a friction disc 10, the lower surface of the friction disc 10 is supported on a bottom plate 14 through a lower conical spring 13, and the upper surface of the friction disc 10 is provided with a lower disc rubber pad 8. An insertion head for fixing an impact rubber pad 11 is inserted into a center hole at the lower end of the central shaft 3, and a bottom plate rubber pad 12 positioned below the impact rubber pad 11 is arranged in the middle of the upper surface of the bottom plate 14. The periphery of the bottom plate 14 is provided with an annular boss 14-1 extending upwards, the outer circle of the lower end of the lower conical spring 13 is clamped in the annular boss 14, and the upper end face of the annular boss 14 supports the rubber cylinder ring 9 lined in the base 7.

A coulomb damper is arranged between the upper surface of the base 7 and the lower surface of the upper cover 3. The damper comprises a combined damping block 17 which is tightly sleeved outside a central shaft 3 and has a wide upper part and a narrow lower part and an inverted circular truncated cone shape, the lower surface of an upper cover 3 is pressed and held at the upper end of the combined damping block 17 through a friction plate 4, a pressure plate 18 and a disc spring 19, the combined damping block 17 is wedged in a damping ring 16 with a matched inner conical surface, and the bottom surface of the damping ring 16 is supported on the top surface of a base 7 through a gasket 6. The damping ring 16 is sleeved with a rubber retainer ring 5 which is spaced from the inner wall of the upper cover 3. The damping ring 16 has on its inner conical surface a straight bore section with an inner diameter matching the outer circumference of the pressure plate 18, which straight bore section has a recessed spigot bearing the outer edge of the friction lining 4. The lower end of the damping ring 16 has a positioning spigot 16-1 which is recessed into the shim 6.

The upper cover 3 is covered with a dust cover 20, the middle part of the binding surface of the dust cover 20 and the upper surface of the upper cover 3 extends upwards to form an inverted conical surface 20-1 with a small lower part and a large upper part, the upper end of the inverted conical surface 20-1 extends inwards to form a cover surface 20-2 which is flush with the upper end of the central shaft 3, and the inner edge of the cover surface 20-2 is embedded and fixed with the end nut 1 of the central shaft 3.

When the combined damping device is used, the upper cover is rotated to adjust the distance between the upper cover and the base, and the disc spring pretightening force between the combined damping blocks can be installed through compression of the pressing plate, so that the combined damping blocks wedge downwards along the conical surface of the damping ring.

When the vibration damping device works, the lower conical spring is used as a main bearing elastic element, not only is the gravity direction load of the central shaft firstly borne, but also the lower conical spring is organically combined with the upper coulomb damper to form vibration rigidity damping. The distance between the upper cover and the base is adjusted by rotating the upper cover, so that the damping force of the Coulomb damper can be adjusted, the power amplification factor during vibration is controlled, and the effect of inhibiting resonance is achieved. The impact rubber pad on the bottom plate can play a role in vertical impact buffering, and the rubber check ring of the coulomb damper can play a role in buffering horizontal impact in any direction of the circumference.

In addition to the above embodiments, the present invention may have other embodiments. All the technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope claimed by the present invention.

Claims

1. A bottom vibration isolation device comprises a cylindrical hollow base (7) with an open upper surface, wherein the bottom surface of the base is fixedly connected with a bottom plate (14), and the upper part of the base is provided with an upper cover (3) with a central hole on the upper surface through a screw pair; a coulomb damper is arranged between the upper surface of the base and the lower surface of the upper cover; the method is characterized in that:

the coulomb damper comprises a combined damping block which is tightly sleeved outside the central shaft and has a wide upper part and a narrow lower part and is in an inverted frustum shape, and the lower surface of the upper cover is pressed at the upper end of the combined damping block (17) through a disc spring;

a vertical output shaft (2) penetrates through the central hole, the bottom end of the vertical output shaft is positioned in the base, the upper end of the output shaft extends out of the upper cover, and the lower section of the output shaft is fixedly connected with a friction disc (10) in a tight fit manner; a lower disc elastic pad (8) is arranged on the upper surface of the friction disc, and the lower surface of the friction disc is supported on the bottom plate through a lower conical spring; an impact elastic pad (11) is fixed at the lower end of the output shaft, and a bottom plate elastic pad (12) positioned below the impact elastic pad is arranged on the upper surface of the bottom plate.

2. The bottom vibration isolation apparatus according to claim 1, wherein: the periphery of the bottom plate is provided with an annular boss extending upwards, and the excircle of the lower end of the lower conical spring is clamped in the annular boss.

3. The bottom vibration isolation mounting according to claim 2, wherein: the upper end face of the annular boss supports an elastic cylinder ring lined in the base.

4. The bottom vibration isolation mounting according to claim 3, wherein: the combined damping block is wedged in a damping ring with an inner conical surface matched with the combined damping block, the bottom surface of the damping ring is borne on the top surface of the base through a gasket, and an elastic retainer ring spaced from the inner wall of the upper cover is sleeved outside the damping ring.

5. The bottom vibration isolation mounting according to claim 4, wherein: the lower surface of the upper cover is pressed and held at the upper end of the combined damping block through a friction plate, a pressing plate and a disc spring, a straight hole section with the inner diameter matched with the outer circle of the pressing plate is arranged on the inner conical surface of the damping ring, and a concave spigot bearing the outer edge of the friction plate is arranged on the straight hole section.

6. The bottom vibration isolation mounting according to claim 5, wherein: the lower end of the damping ring is provided with a positioning spigot which is embedded into the upper recess of the gasket.

7. The bottom vibration isolation mounting according to claim 6, wherein: and an insertion head of an impact elastic pad is inserted and fixed in a central hole at the lower end of the output shaft.

8. The bottom vibration isolating device according to any one of claims 1 to 7, wherein: the upper cover dustcoat is equipped with the dust cover, the binding face middle part of dust cover and upper cover upper surface extends the back taper face big end up, the upper end of back taper face extends inwards with the cover capping face of center pin upper end parallel and level.