CN209638316U - Vehicle-mounted quasi-zero stiffness vibration damping device - Google Patents

Abstract

The utility model relates to a kind of vehicle-mounted quasi- zero stiffness vibration absorber, the tapered strut component being connected to including carrying platform, by ball bearing below carrying platform；Damping element is connect by buffer beam with ball bearing ball in tapered strut component；Buffer beam protrudes into inside outside upper housing, and buffer beam one end is fixed with fixed block, and upper housing is threadedly coupled with lower case, is fixed with damping assembly in lower case in kerve；Compressed spring is trapped on the lower spring cup in interior kerve in damping assembly, and upper set is on the upper spring seat of upper guide pad, damper and compressed spring laid out in parallel；Inner edge is connect with fixed block and upper guide pad in disk spring, and lower outer rim is fixed in the locating piece up and down of upper housing.Compared with the existing technology, the advantages that the utility model has the natural frequency of vibration low, good damping result, applicable situation is more.

Description

Vehicle-mounted quasi-zero stiffness vibration damping device

technical field

The utility model relates to the technical field of vibration control, in particular to a vehicle-mounted quasi-zero stiffness vibration damping device.

Background technique

The low-frequency vibration generated during transportation will endanger the physical and mental health of the staff, affect the quality of the transported goods, cause unnecessary losses, and also bring noise pollution. In order to solve this kind of problem, effective low-frequency vibration reduction design is the focus of research in various engineering fields.

The linear vibration reduction system based on the passive vibration reduction theory has a better isolation effect on medium and high frequency vibrations. Due to the contradiction between its deformation and stiffness, its performance in isolating low-frequency vibrations is poor, and it is difficult to meet various low-frequency vibration reduction requirements in the engineering field. . If active or semi-active vibration reduction is used, although good low-frequency vibration reduction performance can be achieved, it involves control technology and increases the complexity of the system, which will easily lead to an oversized structure, high energy consumption, and high cost.

Utility model content

Aiming at the shortcomings in the above-mentioned prior art, the applicant provides a vehicle-mounted quasi-zero-stiffness vibration isolation device with a reasonable structure, which has the advantages of low natural vibration frequency and good vibration damping effect, thereby effectively reducing low-frequency vibration during transportation and effectively It solves the defect of insufficient linear damping system.

The technical scheme adopted in the utility model is as follows:

A vehicle-mounted quasi-zero-rigidity vibration damping device includes a bearing platform, and a plurality of tapered pillar assemblies are installed on the bottom surface of the bearing platform.

The structure of a single tapered strut assembly consists of a ball joint with multiple damping elements evenly distributed at its base.

The structure of a single damping element is as follows: it includes an upper shell and a lower shell that cooperate with each other. The inner bottom surface of the lower shell is provided with a groove, and the lower spring seat is fixedly installed in the groove, which is located on the outer ring of the groove. A lower guide ring is installed on the inner bottom surface of the lower housing, and an upper guide block is set on the top of the lower guide ring, and an upper spring seat is fixedly installed on the inner bottom surface of the upper guide block, and a spring seat is installed between the upper spring seat and the lower spring seat. There is a compression spring, the compression spring and the damper are arranged vertically side by side, the upper plane of the upper guide block is fixedly installed under the inner positioning ring; The lower end of the damping rod is equipped with a fixed block, and the inner positioning ring is installed under the fixed block; the upper positioning block and the lower positioning block are installed on the inner wall of the upper housing, and the upper positioning block and the lower positioning block are spaced up and down and arranged correspondingly , the lower surface of the upper positioning block is fixed with the outer positioning ring, and the upper surface of the lower positioning block is fixed with the outer positioning ring; it also includes a disc spring, the upper inner edge of which is installed on the inner positioning ring and the inner positioning ring. Between the bottom of the inner positioning ring, the lower outer edge is installed between the top of the outer positioning ring and the bottom of the external positioning ring.

As a further improvement of the above technical solution:

There are at least four tapered pillar assemblies, which are respectively installed at the four corners of the bottom surface of the bearing platform.

The tapered strut assembly includes three damping elements distributed at 120 degrees.

The section of the damping rod is circular, and the upper end is spherical, which is connected with the ball hinge spherically.

The fixed block is circular; the inner positioning ring, the inner positioning ring, the outer positioning ring and the outer positioning ring are all annular structures with a semicircular section; the upper positioning block and the lower positioning block are both cross-sectional into a rectangular ring structure.

A clearance fit is adopted between the upper guide block and the lower guide ring.

The upper shell is screwed to the lower shell.

The outer bottom surface of the lower case is spherical.

The disc spring is a conical structure.

The disk spring is used as negative stiffness, and the compression spring is used as positive stiffness. Through the principle of parallel connection of positive and negative stiffness, the natural vibration frequency of the vibration damping element is low, and then the natural vibration frequency of the tapered pillar and the entire vibration damping device is low, so that Realize the purpose of the vibration damping device to isolate low-frequency vibration, and achieve the effect of vibration reduction.

The beneficial effects of the utility model are as follows:

The utility model has a compact and reasonable structure, adopts a combination of disc springs and compression springs as the core of the vibration damping element, has low natural vibration frequency, good vibration damping performance, can effectively reduce low-frequency vibration during vehicle transportation, and is suitable for many occasions.

The utility model also includes the following advantages:

(1) The vibration damping rod and the ball hinge are spherically connected, and the angle between the vibration damping element and the bearing platform can be adjusted when bearing circumferential vibration, and part of the vibration can be buffered;

(2) The bottom surface of the lower shell is spherical, which realizes the stable contact between the conical pillar assembly and the ground when it is subjected to circumferential vibration, so that the bearing platform is in a stable environment;

(3) The upper shell and the lower shell are threaded, and the preload of the compression spring can be adjusted by rotating the thread, so as to ensure that the compression spring and the damper are in a suitable position with the best vibration damping effect;

(4) Disc spring as negative stiffness, compression spring as positive stiffness, cooperate with damper, absorb part of energy to play self-damping effect when subjected to vibration, realize the effect of vibration-damping device isolating low-frequency vibration;

(5) The upper guide block and the lower guide ring are in clearance fit, and play a guiding role while protecting the compression spring and the damper.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a schematic structural view of the tapered strut assembly of the present invention.

Fig. 3 is a schematic diagram of the internal structure of the damping element of the present invention.

Among them: 1. Loading platform; 2. Tapered pillar assembly; 3. Damping element; 4. Ball hinge; 301. Damping rod; 302. Upper shell; 303. Upper positioning block; 304. Upper outer positioning ring; 305, under the outer positioning ring; 306, the lower positioning block; 307, the damper; 308, the lower housing; 309, the fixed block; 310, on the inner positioning ring; 311, the disc spring; 312, under the inner positioning ring; 313 , the upper spring seat; 314, the upper guide block; 315, the compression spring; 316, the lower guide ring; 317, the lower spring seat.

Detailed ways

Below in conjunction with accompanying drawing, illustrate the specific embodiment of the present utility model.

As shown in FIG. 1 : a structural schematic diagram of the utility model, including a bearing platform 1 and four tapered pillar assemblies 2 .

As shown in FIG. 2 : a schematic diagram of the structure of the conical strut assembly of the present invention, the conical strut assembly 2 is connected to the bearing platform 1 through a ball joint 4 . The conical strut assembly 2 is composed of three evenly distributed damping elements 3 connected with ball hinges 4, and the damping elements 3 are arranged at intervals of 120 degrees. The bottom of the damping element 3 is a spherical surface, so that the contact between the conical pillar assembly 2 and the ground is stable and firm, and the vibration damping device can be placed on the ground stably.

As shown in Figure 3: a schematic diagram of the internal structure of the damping element of the present invention, the damping rod 301 extends from the outside of the upper housing 302 into the interior from top to bottom, the lower end of the damping rod 301 is installed with a fixed block 309, and the bottom of the fixed block 309 is installed 310 on the inner positioning ring. When receiving a longitudinal force, the damping rod 301 moves up and down relative to the upper casing 302 . The lower spring seat 317 is fixedly installed in the inner bottom surface groove of the lower housing 308, the lower guide ring 316 is fixedly installed on the inner bottom surface of the lower housing 308, the upper guide block 314 is installed with the lower guide ring 316, and the inner bottom surface of the upper guide block 314 is fixed. An upper spring seat 313 is installed, a compression spring 315 is sleeved between the upper spring seat 313 and the lower spring seat 317, the damper 307 and the compression spring 315 are arranged side by side between the upper guide block 314 and the lower guide ring 316, and the upper guide block 312 under the inner positioning ring fixedly installed on the plane of 314. An upper positioning block 303 and a lower positioning block 306 are installed on the inner wall of the upper housing 302, the outer positioning ring upper 304 is fixedly installed on the upper positioning block 303, the lower outer positioning ring 305 is fixedly installed on the lower positioning block 306; The inner edge is installed between the upper 310 of the inner positioning ring and the lower 312 of the inner positioning ring, and the lower outer edge is installed between the upper 304 of the outer positioning ring and the lower 305 of the outer positioning ring. Preferably, the upper housing 302 is screwed to the lower housing 308 , and the distance between the upper housing 302 and the lower housing 308 is adjusted by rotating the thread, thereby adjusting the pre-compression amount of the compression spring 315 .

Concrete principle of the present utility model is as follows:

By rotating the mating thread between the upper housing 302 and the lower housing 308, the distance between the upper housing 302 and the lower housing 308 is adjusted, so that the compression spring 315 and the damper 307 are in a suitable position with the best damping effect . When the vehicle vibrates, the vibration of the ground is transmitted to the lower housing 308, and the lower housing 308 transmits the vibration to the compression spring 315 and the damper 307. The compression spring 315 and the damper 307 absorb and consume a part of the vibration energy, and the vibration is transmitted upwards to The disc spring 311 consumes part of the vibration energy, and finally the disc spring 311 transmits the vibration to the damping rod 301; the ball connection between the damping rod 301 and the ball hinge 4 realizes the conical strut assembly 2 and The included angle between the bearing platforms 1 is adjusted and changed, and part of the vibration energy is buffered, so that the vibration energy transmitted to the bearing platform 1 is minimal. The lower shell 308 is in ball contact with the ground, so that the contact between the tapered pillar assembly 2 and the ground is more stable. Ultimately, the bearing platform 1 is placed in a more stable environment to achieve the purpose of vibration reduction.

In this example, the positive and negative stiffness of the compression spring 315 and the disk spring 311 are connected in parallel, so that the vibration damping element 3 has an extremely low natural frequency, so that the conical strut assembly 2 and the entire vibration damping device have an extremely low vibration frequency. Natural vibration frequency, so as to isolate low frequency vibration and realize vibration reduction.

The utility model has the advantages of simple and reasonable structure, small size, easy manufacture, low natural vibration frequency and good vibration isolation effect, and can effectively isolate low-frequency vibration and buffer the impact of transportation during vehicle transportation.

The above description is an explanation of the utility model, not a limitation of the utility model. For the scope limited by the utility model, please refer to the claims. Within the protection scope of the utility model, any form of modification can be made.

Claims (9)

1. a kind of vehicle-mounted quasi- zero stiffness vibration absorber, including carrying platform (1), it is characterised in that: the bottom of the carrying platform (1) Face is equipped with multiple tapered strut components (2)；

The structure of single tapered strut component (2) are as follows: including spherical hinge (4), bottom is evenly distributed with multiple damping elements (3)；

The structure of single damping element (3) are as follows: including the upper housing (302) worked in coordination and lower case (308), the lower case (308) inner bottom surface is provided with groove, is fixedly installed in the groove lower spring cup (317), the lower case positioned at groove outer ring (308) it is equipped on inner bottom surface lower guide ring (316), is set with guide pad (314) at the top of lower guide ring (316), on The inner bottom surface of guide pad (314) is fixedly installed with upper spring seat (313), the upper spring seat (313) and lower spring cup (317) it Between be equipped with compressed spring (315), the compressed spring (315) and damper (307) vertical arrangement side by side, the upper guide pad (314) plane is fixedly installed under interior positioning ring (312) on；Buffer beam (301) is external from top to bottom from the upper housing (302) Inside is protruded into, buffer beam (301) lower end is equipped with fixed block (309), and interior positioning ring is installed below the fixed block (309) Upper (310)；Upper housing (302) inner wall is equipped with locating piece (303) and lower locating piece (306), upper locating piece (303) and Lower locating piece (306) between the upper and lower every and be correspondingly arranged, upper locating piece (303) lower surface is fixed on outer positioning ring (304), Lower locating piece (306) upper surface is fixed under outer positioning ring (305)；It further include disk spring (311), inner edge is installed thereon Under (310) on the interior positioning ring and the interior positioning ring between (312), lower outer rim is installed on the outer positioning ring (304) and under the outer positioning ring between (305).

2. vehicle-mounted quasi- zero stiffness vibration absorber as described in claim 1, it is characterised in that: the tapered strut component (2) is extremely There are four few, it is respectively arranged at the angle of the carrying platform (1) bottom surface four.

3. vehicle-mounted quasi- zero stiffness vibration absorber as described in claim 1, it is characterised in that: tapered strut component (2) packet Damping element (3) containing three in 120 degree of distributions.

4. vehicle-mounted quasi- zero stiffness vibration absorber as described in claim 1, it is characterised in that: buffer beam (301) section is Circle, upper end are spherical shape, are connect with the spherical hinge (4) spherical surface.

5. vehicle-mounted quasi- zero stiffness vibration absorber as described in claim 1, it is characterised in that: the fixed block (309) is circle； (312) under (310), interior positioning ring on the interior positioning ring, (305) are section under (304) and outer positioning ring on outer positioning ring At the ring structure of semicircle；The upper locating piece (303) and lower locating piece (306) are the rectangular ring structure in section.

6. vehicle-mounted quasi- zero stiffness vibration absorber as described in claim 1, it is characterised in that: the upper guide pad (314) is under Guide ring is gap-matched between (316).

7. vehicle-mounted quasi- zero stiffness vibration absorber as described in claim 1, it is characterised in that: the upper housing (302) and lower casing Body (308) is threadedly coupled.

8. vehicle-mounted quasi- zero stiffness vibration absorber as described in claim 1, it is characterised in that: the outer bottom of the lower case (308) Face is spherical shape.

9. vehicle-mounted quasi- zero stiffness vibration absorber as described in claim 1, it is characterised in that: the disk spring (311) is cone Shape structure.