CN201568515U

CN201568515U - Automatic damping variable shock absorber

Info

Publication number: CN201568515U
Application number: CN200920164057XU
Authority: CN
Inventors: 安凯
Original assignee: 513 Research Institute of 5th Academy of CASC
Current assignee: 513 Research Institute of 5th Academy of CASC
Priority date: 2009-07-15
Filing date: 2009-07-15
Publication date: 2010-09-01
Anticipated expiration: 2019-07-15

Abstract

The utility model relates to an automatic damping variable shock absorber, which comprises a seal box, a piston with a through hole, a piston column, an upper reset spring, a lower reset spring, an upper spring leaf, a lower spring leaf, an upper valve cover and a lower valve cover, wherein the piston column is fixed between the upper center point and the lower center point of the seal box, the piston is positioned in the middle of the piston column, and the upper reset spring and the lower reset spring are respectively sleeved on the parts on the piston column above and below the piston; the upper valve cover is fixed on the upper surface of the piston by the upper spring leaf, the surface of the valve cover faces the through hole on the upper surface of the piston with set distance, and the lower spring leaf fixes the lower valve cover on the lower surface of the same position on the piston; and the seal box is filled with liquid such as oil and the like. The automatic damping variable shock absorber senses the pressure generated by vibration on the valve cover via the liquid so as to make the valve cover approach to even block the through hole to generate damping, and the damping changes with the change of vibration amplitude, so the utility model can have effective inhibiting effect on vibration with different frequencies.

Description

Automatically become damping shock absorber

Technical field

The utility model relates to a kind of automatic change damping shock absorber, belongs to the vibration suppression technical field.

Background technique

The existence of vibration can influence the normal operation of machine, makes the machining accuracy of lathe, the sensitivity of precision type instrument descend the serious breaking-up that also can cause machine or mechanical structure; In addition, also can trigger noise, befouling environment.Therefore, it is very necessary suppressing, prevent to vibrate the harm that brings effectively.

A common defective of rubber vibration isolator, spring damping and vibration isolating device, hydraulic type vibration damper even other vibration damper is that damping immobilizes.Though the vibration damper Adjustable Damping that has is still changelessly once adjustment, promptly in use can't adjust.Therefore, this type of vibration damper can not effectively suppress the vibration of various frequencies.But in actual applications, equipment may run into the vibration of various frequencies, as be installed in missile-borne equipment and may run into the vibration that atmospheric perturbations produces, also can run into the vibration that missile explosion produces, want effectively to suppress the vibration of various frequencies, unique approach is to adopt the vibration damper of regulating damping automatically.

Summary of the invention

The purpose of this utility model is in order to propose a kind of automatic change damping shock absorber, can more effectively to suppress the vibration of various frequencies.

The purpose of this utility model is to realize like this.

Parts of the present utility model comprise sealed case, have the piston of through hole, piston column, top Returnning spring, bottom Returnning spring, upper springs sheet, lower springs sheet, upper valve cap and bottom valve gap.

Piston column is fixed on sealed case up and down between the central point, and piston is positioned in the middle of the piston column; The top Returnning spring is enclosed within the above piston column part of piston, and it is consistent with the top Returnning spring that the bottom Returnning spring is enclosed within the following piston column partial-length of piston; Upper valve cap is fixed on piston upper surface by the upper springs sheet, and the valve gap face is towards the through hole of piston upper surface, and setpoint distance is arranged; The lower springs sheet is fixed on the lower surface of the same position of piston with the bottom valve gap, and spring sheet is consistent with last bottom flange size shape up and down, and valve cover surfaces is a frustoconic shape up and down; Be full of wet goods liquid in the sealed case.

Working procedure: in external vibration imports sealed case into, piston with top Returnning spring and bottom Returnning spring in piston column neutral position up-down vibration; When piston moved up, the liquid of injection on top produces upper valve cap certain pressure, and valve gap is stressed downwards progressively near the through hole on the piston, and the oil opposite direction along power after piston is stressed that is positioned at the piston both sides flows to an other side from aperture.Damping produces during by aperture at the liquid with viscosity, the fluid viscosity of injection in sealed case is big more, damping force is also big more, and when it was blocked through hole fully as the stressed enough ambassadors of valve gap institute, piston was separated top and the bottom liquid, piston continues to move up, the liquid of sealed case internal upper part produces to the downward pressure of piston the kinetic energy that the kinetic energy that produces when pressure moves up greater than piston by compression, piston begins to move down, and upper valve cap leaves through hole and resets; When piston passed through the piston column neutral position to lower slider, vice versa; By because valve gap is a frustoconic shape, so Oscillation Amplitude is big more, and the through hole on the piston is blocked must be tight more, damping force is also big more, has played automatic adjusting damping; After vibration stops, because the effect of Returnning spring, piston will automatically restore to the piston column neutral position.

Beneficial effect: this automatic change damping shock absorber that the utility model proposed, by the liquid sense vibration to pressure size that valve gap produced, make valve gap near in addition clog through hole and produce damping, its damping changes with the variation of Oscillation Amplitude, makes it to have effective inhibitory action to the vibration of various frequencies.

Description of drawings

Fig. 1 has shown a kind of schematic representation of example of automatic change damping shock absorber,

Returnning spring 3-bottom, 1-sealed case 2-top Returnning spring 4-upper springs sheet 5-lower springs sheet 6-has the piston 7-piston column 8-upper valve cap 9-bottom valve gap of through hole.

Embodiment

Fig. 1 has shown a kind of schematic representation of example of automatic change damping shock absorber.

Parts of the present utility model comprise sealed case 1, have the piston 6 of through hole, piston column 7, top Returnning spring 2, bottom Returnning spring 3, upper springs sheet 4, lower springs sheet 5, upper valve cap 8 and bottom valve gap 9.

Piston column 7 is fixed on sealed case about in the of 1 between the central point, and piston 6 is positioned in the middle of the piston column 7; Top Returnning spring 2 is enclosed within piston column 7 parts of piston more than 6, and bottom reseting spring sleeve 3 is consistent with top Returnning spring 2 at piston column 7 partial-lengths of piston below 6; Upper valve cap 8 is fixed on piston 6 upper surfaces by upper springs sheet 4, and the valve gap face is towards the through hole of piston 6 upper surfaces, and setpoint distance is arranged; Lower springs sheet 5 is fixed on the lower surface of the same position of piston 6 with bottom valve gap 9, top and the bottom spring sheet 4,5 and top and the bottom valve gap 8,9 size shape unanimities, and valve gap 8,9 surfaces in top and the bottom are frustoconic shape; Be full of wet goods liquid in the sealed case 1.

In external vibration imports sealed case 1 into, piston 6 with top Returnning spring 2 and bottom Returnning spring 2 in piston column 7 neutral position up-down vibration; When piston 6 moved up, the liquid that is full of on top had certain pressure to upper valve cap 8, and valve gap is stressed downwards progressively near the through hole on the piston, and the oil that is positioned at piston 6 both sides opposite direction along power after piston 6 is stressed flows to an other side from aperture.Damping produces during by aperture at the liquid with viscosity, the fluid viscosity of injection in sealed case 1 is big more, damping force is also big more, and when it was blocked through hole fully as 8 stressed enough ambassadors of valve gap, piston 6 was separated top and the bottom liquid, piston 6 continues to move up, the liquid of sealed case 1 internal upper part produces by compression to the downward pressure of piston 6, the kinetic energy that the kinetic energy that produces when pressure moves up greater than piston 6, piston 6 begins to move down, and upper valve cap 8 leaves through hole and resets; When piston 6 passed through piston column 7 neutral positions to lower slider, vice versa; By because valve gap 8 is a frustoconic shape, so Oscillation Amplitude is big more, and the through hole on the piston 8 is blocked must be tight more, damping force is also big more, has played automatic adjusting damping; After vibration stops, because the effect of Returnning spring, piston 6 will automatically restore to piston column 7 neutral positions.

Above embodiment comprises but does not all represent the technical solution of the utility model that every any local modification of carrying out is equal to replacement, all will be considered as within the utility model protection domain under spirit of the present utility model and principle.

Claims

1. one kind becomes damping shock absorber automatically, comprise annular seal case (1), have piston (6), piston column (7), top Returnning spring (2), bottom Returnning spring (3), upper springs sheet (4), lower springs sheet (5), upper valve cap (8) and the bottom valve gap (9) of through hole, it is characterized in that: piston column (7) is fixed on sealed case (1) up and down between the central point, and piston (6) is positioned in the middle of the piston column (7); Top Returnning spring (2) is enclosed within above piston column (7) part of piston (6), and bottom Returnning spring (3) is enclosed within below the piston, and upper valve cap (8) is fixed on piston (6) upper surface by upper springs sheet (4), and the valve gap face is towards the through hole of piston (6) upper surface; Lower springs sheet (5) is fixed on the lower surface of the same position of piston (6) with bottom valve gap (9), and upper and lower part spring sheet (4), (5) and upper and lower part valve gap (8), (9) size shape are consistent, and valve gap is a frustoconic shape; The interior full of liquid of sealed case (1).