CN217842517U

CN217842517U - Bottom vibration isolator

Info

Publication number: CN217842517U
Application number: CN202222159972.8U
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 isolator belongs to vibration damper technical field. The upper part of a base of the vibration isolator is screwed with an upper cover; the middle part of the upper surface of the bottom plate is sunken, the large end of the lower conical spring is arranged in the middle part of the upper surface of the bottom plate, the upper end of the lower conical ring supports the friction disc, the friction disc is fixedly connected with the lower end of the central cylinder, and the lower section of the central cylinder and the friction disc are coated in the elastic ring; the lower end of the friction disk is provided with an impact elastic pad, and the middle part of the bottom plate is provided with a bottom plate elastic pad; three damping blocks which are encircled into an inverted frustum shape are tightly sleeved outside the middle section of the central cylinder, the damping blocks are wedged in the damping rings, and the bottom surfaces of the damping rings are borne on the upper end surfaces of the bases; the lower surface of the upper cover is pressed on the upper end surface of the damping block through an elastic gasket. Adopt the utility model discloses not only can effective vibration isolation, with simple structure moreover keep the equilibrium of up-and-down power of moving.

Description

Bottom vibration isolator

Technical Field

The utility model relates to a isolator, especially a bottom isolator 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 buffer cushion, and a conical spring, a buffer cylinder and a conical spring are sequentially arranged between the two buffer cushions 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 technical solution of this patent adopts the structure of upper and lower two conical springs, which is not only complicated in structure, but also not beneficial to keep the balance of the up-and-down moving force.

Disclosure of Invention

The utility model aims to provide a: aiming at the defects in the prior art, the bottom vibration isolator which is simple in structure and can keep the up-and-down movement force balanced is provided through structural improvement, so that the vibration isolation effect is better played.

In order to achieve the above purpose, the utility model discloses a bottom isolator basic technical scheme does: the device comprises a cylindrical hollow base, wherein the upper end surface of the cylindrical hollow base is provided with a through hole, the bottom of the cylindrical hollow base is fixedly connected with a bottom plate, and the upper part of the base is screwed and connected with a thread at the lower end of an upper cover, the upper surface of the upper cover is provided with a central hole;

the middle part of the upper surface of the bottom plate is sunken, the large end of a lower conical spring is arranged in the middle part of the upper surface of the bottom plate, the upper end of the lower conical ring supports a friction disc, the friction disc is fixedly connected with the lower end of a central cylinder, the upper end of the central cylinder penetrates through the through hole and the central hole, and the lower section of the central cylinder and the friction disc are coated in an elastic ring;

the lower end of the friction disc is provided with an impact elastic pad, and a bottom plate elastic pad positioned below the impact elastic pad is arranged in a middle depression of the bottom plate;

three damping blocks which are enclosed to form an inverted truncated cone shape with a wide upper part and a narrow lower part are tightly sleeved outside the middle section of the central cylinder, the damping blocks are wedged in a damping ring with an inner conical surface matched with the damping block, and the bottom surface of the damping ring is borne on the upper end surface of the base; the lower surface of the upper cover is pressed on the upper end surface of the damping block through an elastic gasket.

When the vibration isolation device works, the lower conical spring is used as an elastic element for mainly bearing the load of the central cylinder in the gravity direction and is organically combined with a coulomb damper with the upper part mainly composed of a damping block and a damping ring, and the vibration isolation can be effectively realized. Because the lower conical spring takes the bottom end as a foundation and the upper end supports the central cylinder, when the force is downward in the vertical reciprocating vibration process, the small end of the lower conical spring slightly moves downward, the large end expands outward, and the upper end is tightened and the lower end is loosened; when the force is upward, the small end of the lower conical spring slightly moves upwards, the large end of the lower conical spring is contracted inwards, the upper end of the lower conical spring is slightly loose, and the lower end of the lower conical spring is tightened, so that the balance of the up-and-down moving force is kept by a simple structure.

The utility model discloses further perfect is: and an external thread convex ring screwed with the internal thread at the lower end of the central cylinder extends from the middle part of the upper surface of the friction disc.

The utility model discloses further perfect is: and the lower surface of the friction disc extends to form a boss extending into the small end of the lower conical spring.

The utility model discloses further perfect is: and the central hole of the boss is inserted with an inserting head of the impact elastic pad.

The utility model discloses further perfect is: and the damping ring is sleeved with an elastic retainer ring which is spaced from the inner wall of the upper cover.

The utility model discloses further perfect is: an upper cover gasket and a damping disc gasket are arranged between the lower surface of the upper cover and the elastic gasket.

The utility model discloses still further perfect is: the top of the central cylinder is provided with a screw cap. Due to the hollow structure design of the central cylinder, the friction area is increased, the self weight is reduced, and the stability and the overturn resistance are facilitated.

Drawings

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

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

Detailed Description

Example one

The specific structure of the bottom vibration isolator mainly used for vehicle-mounted or transport airborne equipment is shown in figure 1, and comprises a cylindrical hollow base 15, wherein the upper end face of the cylindrical hollow base is provided with a through hole 15-1, the bottom of the cylindrical hollow base is fixedly connected with a bottom plate 16, and the upper part of the base 15 is screwed with an internal thread at the lower end of an upper cover 3, the upper surface of the upper cover is provided with a central hole 3-1, through an external thread. The middle part of the upper surface of the bottom plate 16 is provided with a concave part in which the big end of a lower conical spring 13 is arranged, the upper end of the lower conical ring 13 supports a friction disc 11, the middle part of the upper surface of the friction disc 11 extends out of an external thread convex ring 11-2 screwed with the internal thread at the lower end of the central cylinder 2, and the upper end of the central cylinder 2 passes through a through hole 15-1 and a central hole 3-1 and is provided with a screw cap 1. The lower section of the central barrel 2 and the friction discs 11 are wrapped in rubber rings 10.

A boss 11-1 extending into the small end of the lower conical spring 13 extends out of the lower surface of the friction disc 11, and an insertion head 12-1 of an impact rubber pad 12 is inserted into a central hole of the boss 11-1; a bottom plate rubber elastic pad 14 is arranged in the middle concave part of the bottom plate 16 and is positioned below the impact rubber pad 12.

Three damping blocks 7 which are enclosed to form an inverted truncated cone shape with a wide upper part and a narrow lower part are tightly sleeved outside the middle section of the central cylinder 2, the damping blocks 7 are wedged in a damping ring 8 with a matched inner conical surface, the bottom surface of the damping ring is borne on the upper end surface of a base 15, and a rubber retaining ring 9 which is spaced from the inner wall of an upper cover is sleeved outside the damping ring 8. An upper cover gasket 4, a damping disc gasket 5 and a rubber gasket 6 are arranged between the lower surface of the upper cover 3 and the upper end surface of the damping block 7 to form a pressing structure.

When the damping ring is used, the distance between the upper cover and the base can be changed by screwing the upper cover, so that the holding force of the damping block on the central shaft is regulated and controlled by adjusting the wedge tightness between the damping block and the conical surface of the damping ring, the required damping friction force is obtained, and resonance can be avoided. When the vibration isolation device works, the lower conical spring mainly bears the load of the central cylinder in the gravity direction and is organically combined with the damper to effectively isolate vibration. The structure that the lower section of the central cylinder and the friction disc are coated in the elastic ring can simultaneously have upward and circumferential elastic limit. 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, can select suitable rubber circle thickness and hardness according to the difference of motorcycle type to reach the spacing rigidity that needs. The damping disc gasket is made of an oil-resistant material and can prevent dust, water vapor and the like from entering.

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 isolator comprises a cylindrical hollow base (15) with a through hole (15-1) on the upper end surface and the bottom fixedly connected with a bottom plate (16), wherein the upper part of the base is screwed and connected with a thread on the lower end of an upper cover (3) with a central hole (3-1) on the upper surface; the method is characterized in that:

the middle part of the upper surface of the bottom plate is sunken, the large end of a lower conical spring (13) is arranged in the middle part of the upper surface of the bottom plate, the upper end of the lower conical ring supports a friction disc (11), the friction disc (11) is fixedly connected with the lower end of a central cylinder (2) of which the upper end penetrates through the through hole (15-1) and the central hole (3-1), and the lower section of the central cylinder and the friction disc are wrapped in an elastic ring (10);

the lower end of the friction disc is provided with an impact elastic pad (12), and a bottom plate elastic pad (14) positioned below the impact elastic pad is arranged in the middle depression of the bottom plate;

three damping blocks (7) which are encircled into an inverted truncated cone shape with a wide upper part and a narrow lower part are tightly sleeved outside the middle section of the central cylinder, the damping blocks are wedged in a damping ring (8) with an inner conical surface matched with the damping blocks, and the bottom surface of the damping ring is borne on the upper end surface of the base; the lower surface of the upper cover is pressed on the upper end surface of the damping block through an elastic gasket (6).

2. The bottom vibration isolator according to claim 1, wherein: and an external thread convex ring screwed with the internal thread at the lower end of the central cylinder extends from the middle part of the upper surface of the friction disc.

3. The bottom vibration isolator according to claim 2, wherein: and the lower surface of the friction disc extends to form a boss extending into the small end of the lower conical spring.

4. The bottom isolator of claim 3 wherein: and the central hole of the boss is inserted with an inserting head for impacting the elastic pad.

5. The bottom vibration isolator according to any one of claims 1 to 4, wherein: and an elastic retainer ring which is spaced from the inner wall of the upper cover is sleeved outside the damping ring.

6. The bottom vibration isolator according to claim 5, wherein: an upper cover gasket and a damping disc gasket are arranged between the lower surface of the upper cover and the elastic gasket.

7. The bottom isolator of claim 6 wherein: the top of the central cylinder is provided with a screw cap.