CN201747847U - Damper with gradually increasing damping rate - Google Patents

Abstract

The utility model discloses a damper with gradually increasing damping rate, which comprises a casing, a piston, a piston rod and a sealing end cover, wherein the piston is arranged inside an internal chamber of the casing, the piston rod is connected with the piston and guided out through an opening end of the casing, the opening end is provided with the sealing end cover, and the inner wall of the casing is provided with an axial damping channel with the cross-sectional area thereof gradually decreasing in the length direction. According to the technical scheme, the damping channel is designed in such a manner that the cross-sectional area thereof gradually decreases in the length direction, which enables the damper to generate damping, and when the piston slides from one end of the damping channel having larger cross-sectional area to the other end having smaller cross-sectional area, the damping rate increases gradually.

Description

The damper that a kind of damping ratio increases progressively gradually

Technical field:

The utility model relates to the damper that a kind of damping ratio increases progressively gradually.

Background technique:

Damper is to promote piston by external force to move, make the liquid of chamber interior flow to the chamber of opposite side from the chamber of piston one side through damping flow channel, pass through control flow rate simultaneously, thereby produce resistance, reach the influence of suppression equipment cyclic load and impulsive load.

The size of weighing the damper damping is a damping ratio, the damping flow channel section area is more little, damping ratio is big more, existing part door hinge is that processing is on piston with the damping flow channel of damper, but this damping flow channel section area is constant, that is to say that its damping ratio is constant, when producing damping, the active force of bestowing piston rod is big more, the hydraulic fluid flow rate of damping flow channel of flowing through is big more, the acceleration of piston motion is just big more, in the stroke of setting, when reaching certain value as if active force, because piston motion is too fast, the underdamping that produces causes the generation of clashing into, and makes damper lose pooling feature.

Summary of the invention:

The purpose of this utility model is in order to overcome the shortcoming of above-mentioned prior art, the damper that provides a kind of damping ratio to increase progressively gradually.

For achieving the above object, the technological scheme that the utility model provides is: the damper that a kind of damping ratio increases progressively gradually, include cylinder body, piston, piston rod and end cover, piston places in the internal chamber of cylinder body, piston rod is connected with piston, and draws from the opening end of cylinder body, at this opening end end cover is set, be processed with axial damping flow channel on the inwall of cylinder body, the cross-section area of described damping flow channel reduces along its length gradually.

Be provided with sliding ring at the cylinder interior chamber towards a side of opening end, be provided with elastic element between this sliding ring and the end cover.

After adopting technique scheme, damping flow channel is designed to cross-section area reduces gradually along its length, can make damper produce damping, when piston slided to the less end of cross-section area from the bigger end of damping flow channel cross-section area, damping ratio increased gradually.

Description of drawings:

Fig. 1 is the structural representation that the forced damper rod of the utility model is pulled out state;

Fig. 2 is that the forced damper rod of the utility model is pressed into the structural representation that produces damping;

Fig. 3 is vertical sectional structure chart of the forced damper cylinder body of the utility model;

Fig. 4 is the horizontal sectional structure chart of the forced damper cylinder body of the utility model;

Fig. 5 is the structural representation that the utility model drawer type damper rod is pressed into state;

Fig. 6 is that the utility model drawer type damper rod is pulled out the structural representation that produces damping.

Embodiment:

Now elaborate the utility model in conjunction with the accompanying drawings:

The damper of present embodiment is forced door hinge damper, its structure as depicted in figs. 1 and 2, it includes cylinder body 1, piston 2, piston rod 3 and end cover 4, piston 2 places in the internal chamber 11 of cylinder body 1, piston rod 3 is connected with piston 2, and draw from the opening end of cylinder body 1, at this opening end end cover 4 is set, on the inwall of cylinder body 1, be processed with axial damping flow channel 5, as shown in Figure 3 and Figure 4, the cross-section area of described damping flow channel 5 is pressed into direction along piston rod 3 to be reduced gradually, thereby the damping ratio of realizing damper improves gradually, as long as the less end 51 of damping flow channel cross-section area is enough little, in the tolerance range of damper, be hit and rotate the door leaf close when damper internal piston 2 moves to the less side 51 of damping flow channel cross-section area, its impact energy all can be absorbed fully, avoid clashing into, be provided with sliding ring 6 at cylinder interior chamber 11 towards a side of opening end, be provided with Returnning spring 7 between this sliding ring 6 and the end cover 4, when piston rod 3 is compressed into cylinder interior chamber 11, owing to forcing hydraulic oil to promote sliding ring 6, compressing into of piston rod 3 slide towards inner chamber opening extreme direction, and compression reseting spring 7, when piston rod 3 is pulled out internal chamber 11, Returnning spring 7 promotes sliding ring 6 and resets, thereby prevent that vacuum from appearring in inwall chamber 11, jumping phenomena occurs when avoiding damper work, influence the stationarity of piston rod 3 motions.

This damper also can be designed to the drawer type damper in addition, produce damping when promptly pulling out, its structure as shown in Figure 5 and Figure 6, with the difference of above-mentioned forced damper be: the cross-section area of damping flow channel 5 is pressed into direction along piston rod 3 and increases gradually, and all the other structures are the same.

The above only is preferred embodiment of the present utility model, is not the utility model is done any pro forma restriction.Any those of ordinary skill in the art, do not breaking away under the technical solutions of the utility model scope situation, all can utilize the method and the technology contents of above-mentioned announcement that technical solutions of the utility model are made many possible changes and modification, or be revised as the equivalent embodiment of equivalent variations.So every content that does not break away from technical solutions of the utility model, the equivalence of doing according to shape, structure and the principle of the utility model changes, and all should be covered by in the protection domain of the present utility model.

Claims (2)

1. damper that damping ratio increases progressively gradually, include shell, piston, piston rod and end cover, piston places in the internal chamber of shell, piston rod is connected with piston, and draw from the opening end of shell, at this opening end end cover is set, is processed with axial damping flow channel on the inwall of shell, it is characterized in that: the cross-section area of described damping flow channel reduces along its length gradually.

2. the damper that a kind of damping ratio according to claim 1 increases progressively gradually is characterized in that: portion's chamber is provided with sliding ring towards a side of opening end in the enclosure, is provided with elastic element between this sliding ring and the end cover.

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