CN203114996U

CN203114996U - Variable-damping variable-stiffness bottom vibration isolator

Info

Publication number: CN203114996U
Application number: CN 201320117818
Authority: CN
Inventors: 季馨
Original assignee: NANJING JIENUO ENVIRONMENT TECHNOLOGY Co Ltd
Current assignee: NANJING JIENUO ENVIRONMENT TECHNOLOGY Co Ltd
Priority date: 2013-03-15
Filing date: 2013-03-15
Publication date: 2013-08-07
Anticipated expiration: 2023-03-15

Abstract

The utility model discloses a variable-damping variable-stiffness bottom vibration isolator. According to the vibration isolator, a base is utilized as the basis, an outer shell is arranged on the base, a main shaft penetrates into a hole in the top of the outer shell, an upper spring retainer is arranged on the inner top wall of the outer shell, an upper check ring is fixed on the main shaft, and an upper section cone spring is arranged between the upper spring retainer and the upper check ring. A lower check ring is fixed on the main shaft below the upper check ring, a limiting ring having the degree of freedom in the axial direction and the radial direction relative to the main shaft is arranged between the upper check ring and the lower check ring, and the outer edge of the limiting ring has the conical degree. A lower spring retainer is fixed on the base, and the lower section cone spring is arranged between the lower spring retainer and the lower check ring. A damping buffering spring is arranged between the upper spring retainer and the lower spring retainer, a damping ring is horizontally arranged in the middle of the damping buffering spring inward, and the outer edge of the damping ring has the conical degree matched with the conical degree of the outer edge of the limiting ring and makes contact with the outer edge of the limiting ring. After the surfaces of the two outer edges are attached to each other firmly, the limiting ring is 0.5mm-1mm higher than the damping ring, and the lower surface of the upper check ring is pressed on the upper surface of the damping ring. The vibration isolator has variable-stiffness and variable-damping characteristics, and is large in displacement.

Description

A kind of change damping becomes rigidity bottom vibration isolator

Technical field

The utility model relates to a kind of vibration isolation buffering device of electronic equipment, specifically is that a kind of change damping becomes rigidity bottom vibration isolator, and it is applicable to safe vibration isolation protection vehicle-mounted, air environment.

Background technique

Along with the modern military development of science and technology; requirement to weaponry further improves; environment Yu that electronic equipment faces adds harsh, how to make electronic equipment still can keep normal performance in varying environment, and the protection device-vibration isolator of electronic equipment is proposed following specific (special) requirements:

1, can be under than high acceleration, than mechanical environment conditions such as big displacement quantity, greater impacts, guarantee that electronic equipment can proper functioning;

2, vibration isolator is in three abilities that axially all have vibration isolation, a buffering, and along with the increase of displacement amount, the damping of vibration isolator, rigidity also increase thereupon;

3, when vehicle-mounted impact and airborne bob were hit, electronic equipment was subjected to will guaranteeing the proper functioning of electronic equipment under the situation of bigger impact acceleration;

China's utility model patent " Modular-Type Non-Peak Shock Isolator " (publication number 1457229) and Chinese utility model patent " Vibration Isolator Using For Airborne Electronic Equipment " (publication number 2630565) correspond respectively to GWF and GQJ type vibration isolator, and its main defective is as follows:

Rigidity such as GWF type metal vibration isolator is become damping isolator, when being subjected to greater impact, are prone to irreducible phenomenon, and are subjected to the restriction of original structure, and the displacement amount of this vibration isolator is less;

GQJ type metal vibration isolator waits damping isolator for becoming rigidity, when causing resonance when being subjected to bigger vibration, is prone to the situation of not restraining resonance, and is subjected to the restriction of original structure, and the displacement amount of this vibration isolator is less.

The model utility content

Technical problem to be solved in the utility model provides a kind of the have rigidity of change, change damping characteristic and the bigger bottom vibration isolator of displacement amount.

A kind of change damping described in the utility model becomes rigidity bottom vibration isolator, this vibration isolator is based on base, shell is installed on the base, the cover top portion center is provided with a hole, main shaft penetrates in this hole, and the shell inner roof wall is equipped with spring abutment, and last back-up ring is fixedly arranged on the main shaft, the great circle of last truncated cone spring is against the spring abutment downside, and down circle be against on the back-up ring or the step surface of main shaft on; Main shaft below last back-up ring fixedly has following back-up ring, is provided with relative main shaft between the upper and lower back-up ring at the position limit cycle that axially and radially has degrees of freedom, and the outer rim of this position limit cycle has tapering; At base following spring abutment is arranged fixedly, the great circle of following truncated cone spring is against down on the spring abutment, and ringlet is against down the back-up ring downside; The damping buffering spring is installed between upper and lower spring abutment, damping buffering spring edge is up and down fixed with upper and lower spring abutment respectively, damping buffering spring middle part inwardly is horizontally disposed with damping ring, this damping ring outer rim has the tapering that coincide with the outer rim of position limit cycle and contacts with it, and after two outer edge surfaces paste the jail, limited ring exceeds damping ring 0.5mm～1mm, and last back-up ring lower surface is pressed on the damping ring upper surface.

Further, the cone-apex angle of damping ring outer rim is between 60 degree～120 degree.

In order further to improve effectiveness in vibration suppression, mesh pad is equipped with at described spring abutment center down.The mesh pad edge is provided with step, is conducive to the stability of truncated cone spring in horizontal vibration down, has also guaranteed the coaxality of time awl spring

As improvement, described back-up ring is down fixed by the screw that is installed in the main shaft top, simultaneously be provided with the center hole corresponding with the head position of screw at mesh pad, the center hole aperture is greater than the external diameter of screw head, and thickness is greater than the height of screw head, to guarantee that screw head does not hit the bottom of housing under the big impact of accelerating.

The beneficial effects of the utility model:

1) along with the increase of vertical deviation, the decrement of last truncated cone spring or following truncated cone spring increases thereupon, and the rigidity of vibration isolator also increases thereupon, and the impact that is conducive to vibration isolator resets.

2) because the damping ring outer rim in the damping buffering spring assembly and position limit cycle outer rim contact position adopt tapering, when the vertical deviation amount increases, when the damping ring operation so far, the damping of vibration isolator also increases thereupon, be conducive to vibration isolator and absorb outside energy, effectively suppress resonance.

3) in order to strengthen the stability of vibration isolator horizontal vibration, upper and lower spring abutment is made and is had step shape, and during horizontal vibration, the great circle of following truncated cone spring can be more firm, has guaranteed vibration isolator main shaft and the coaxality of truncated cone spring up and down simultaneously.

4) by silk footpath and the pitch of the sheet spring quantity that changes the damping buffering spring assembly, upper and lower truncated cone spring, it is identical to obtain boundary dimension, and the series product with different-stiffness, damping characteristic and different bearer amount.Can change the extreme displacement amount of vertical, the level of vibration isolator by the size that changes housing and main shaft.

Description of drawings

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

Embodiment

As shown in Figure 1, change damping of the present utility model becomes rigidity bottom vibration isolator, it is based on base 1, shell 2 is installed on the base 1, and shell 2 top center are provided with a hole, and main shaft 9 penetrates in this hole, shell 2 inner roof walls are equipped with spring abutment 7, last back-up ring 10 is fixedly arranged on the main shaft 9, and the great circle of last truncated cone spring 8 is against spring abutment 7 downsides, and down circle is against on the back-up ring 10 or on the step surface of main shaft 9.

Main shaft below last back-up ring 10 keeps at a certain distance away and is provided with back-up ring 4 down, this time back-up ring 4 is fixing by the screw 11 that is installed in main shaft 9 tops, be provided with relative main shaft between the upper and lower back-up ring at the position limit cycle 6 that axially and radially has degrees of freedom, the outer rim of this position limit cycle 6 has tapering, and its range of taper is between 60 degree～120 degree.At base 1 following spring abutment 13 is arranged fixedly, the great circle of following truncated cone spring 15 is against down on the spring abutment 13, ringlet is against down back-up ring 4 downsides, mesh pad 12 is equipped with at following spring abutment 13 centers, mesh pad 12 edges are provided with step, be provided with the center hole corresponding with the head position of screw 11 at mesh pad 12, the center hole aperture is greater than the external diameter of screw head, and thickness is greater than the height of screw head.Damping buffering spring 3 is installed between upper and lower spring abutment, damping buffering spring 3 middle parts inwardly are horizontally disposed with damping ring 5, these damping ring 5 outer rims have the tapering that coincide with the outer rim of position limit cycle 6 and contact with it, and after two outer edge surfaces paste the jail, limited ring exceeds damping ring 0.5mm～1mm, and last back-up ring 10 lower surfaces are pressed on damping ring 5 upper surfaces.During vertical motion, damping ring 5 produces damping with 3 frictions of damping buffering spring; During horizontal motion, last back-up ring 10 produces damping with the friction of damping friction ring, following back-up ring 4 with position limit cycle 6 frictions, and buffer spring 3 has increased horizontal rigidity.

The manufacture process of model utility is:

A) spring abutment is packed into housing.

B) the damping spring assembly is packed into housing and insert spring abutment and housing between the crack.

C) will go up the truncated cone spring, go up pack in order main shaft and being positioned in the damping spring assembly of back-up ring, damping ring, position limit cycle, screw, adjust the initial damping force of vibration isolator by the degree of tightness of adjusting screw.

D) will descend truncated cone spring, mesh pad, base plate to pack into successively, and rivet with copper rivet.

The concrete application approach of the utility model is a lot; the above only is preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvement, these improvement also should be considered as protection domain of the present utility model.

Claims

1. one kind becomes damping change rigidity bottom vibration isolator, it is characterized in that, this vibration isolator is based on base (1), shell (2) is installed on the base (1), and shell (2) top center is provided with a hole, and main shaft (9) penetrates in this hole, shell (2) inner roof wall is equipped with spring abutment (7), main shaft (9) is gone up fixedly has last back-up ring (10), the great circle of last truncated cone spring (8) to be against spring abutment (7) downside, and following the circle is against on the back-up ring (10) or on the step surface of main shaft (9); Main shaft in last back-up ring (10) below fixedly has following back-up ring (4), is provided with relative main shaft between the upper and lower back-up ring and axially and radially has free-moving position limit cycle (6), and the outer rim of this position limit cycle (6) has tapering; At base (1) following spring abutment (13) is arranged fixedly, the great circle of following truncated cone spring (15) is against down on the spring abutment (13), and ringlet is against down back-up ring (4) downside; Damping buffering spring (3) is installed between upper and lower spring abutment, damping buffering spring (3) edge is up and down fixed with upper and lower spring abutment respectively, damping buffering spring (3) middle part inwardly is horizontally disposed with damping ring (5), this damping ring (5) outer rim has the tapering that coincide with the outer rim of position limit cycle (6) and contacts with it, and after two outer edge surfaces paste the jail, limited ring exceeds damping ring 0.5mm～1mm, and last back-up ring (10) lower surface is pressed on damping ring (5) upper surface.

2. change damping according to claim 1 becomes rigidity bottom vibration isolator, it is characterized in that, the cone-apex angle α of damping ring (5) outer rim is 60 degree～120 degree.

3. change damping according to claim 1 and 2 becomes rigidity bottom vibration isolator, it is characterized in that, mesh pad (12) is equipped with at described spring abutment (13) center down.

4. change damping according to claim 3 becomes rigidity bottom vibration isolator, it is characterized in that described mesh pad (12) edge is provided with step.

5. want 4 described change dampings to become rigidity bottom vibration isolator according to right, it is characterized in that, described back-up ring (4) down is fixing by the screw (11) that is installed in main shaft (9) top, simultaneously be provided with the center hole corresponding with the head position of screw (11) at mesh pad (12), the center hole aperture is greater than the external diameter of screw head, and thickness is greater than the height of screw head.