CN201162888Y

CN201162888Y - Constant spring hanger

Info

Publication number: CN201162888Y
Application number: CNU200820031529XU
Authority: CN
Inventors: 郭斌; 徐一鸣
Original assignee: YANGZHOU HEWEI DISC SPRING MANUFACTURING Co Ltd
Current assignee: YANGZHOU HEWEI DISC SPRING MANUFACTURING Co Ltd
Priority date: 2008-02-01
Filing date: 2008-02-01
Publication date: 2008-12-10
Anticipated expiration: 2018-02-01

Abstract

The utility model discloses a constant spring hanger in the technical field of flexible telescopic machinery, which comprises a shell and a loading tie rod. The shell is hollow inside; the loading tie rod is positioned inside the shell; the lower end of the loading tie rod extends out of the shell via the bottom cover of the shell; a tie plate is fixed at the upper part of the loading tie rod; a plurality of Belleville spring units are positioned between the tie plate and the bottom cover of the shell; each Belleville spring unit consists of a Belleville spring or a plurality of Belleville springs that are stacked together; two adjacent Belleville spring units are positioned in the opposite directions; the ratio between the height of internal cone in the Belleville spring and the thickness of the internal cone in the Belleville spring is 1.5-2.0; a position limiting block that prevents the Belleville spring from folding outwards is positioned between two Belleville spring units that are positioned in involution. Because the Belleville spring with zero rigidity characteristic is utilized to make the constant spring hanger, the utility model, which has the advantages of simple structure, easy assembly, low manufacturing cost and reliable application, can be applied to places in need of suspension and support.

Description

A kind of constant force spring hanging frame

Technical field

The utility model relates to a kind of elastic telescopic mechanical device, particularly a kind of constant force spring hanging frame.

Background technique

In the prior art, a kind of umbrella structure constant force spring hanging frame is arranged, its publication number is CN1648504A, and it mainly comprises shell, spring, load pull bar, load arm-tie, arm-tie axle, arm-tie axle track, last item, slewing frame, load axle, suspension rod axle, arm-tie, main shaft, fixed frame, pressing plate, load axle slideway; Fixed frame becomes overall structure with shell, and vertical line place, fixed frame center is provided with load axle slideway, and load axle slideway both sides respectively are provided with a downward plane; Two slewing frames are by shared load axle, and an end of two branched supporting plates is by shared arm-tie axle, and the other end of arm-tie is connected with last item separately, the equilateral quadrilateral that formation can translation-angle; Load arm-tie upper end links to each other with the load axle, and the arm-tie slideway placement arm-tie axle at middle part, arm-tie axle can slippages in the arm-tie slideway, spurs arm-tie simultaneously and two slewing frames are made corresponding sports; Load slideway on the fixed frame connects into two slewing frames and load arm-tie by shared load axle slidably whole, and two main shafts can carry out linear displacement relatively or contrarily in the plane; Two last items on two slewing frames are pressed on the same pressing plate, and the another side of pressing plate is provided with spring, and last item can carry out linear displacement relatively or contrarily on pressing plate.During its work, when the load pull bar is subjected to downward pulling force, last item bears downward power, main shaft bears power upwards, variation with load pull bar displacement amount, resiliently deformable takes place in spring under the effect of last item and pressing plate, the centre distance of load pull bar, last item and main shaft changes simultaneously, and reach equalising torque, this device can use at small space, can have the physical property of little load, big displacement with the variable hanger of any rigidity of standard spring manufacturing, can satisfy the specific (special) requirements of electrification railway contact net tension compensator.But its structure is relatively complicated, and manufacture cost is higher.

The model utility content

The purpose of this utility model provides a kind of constant force spring hanging frame, makes it simple in structure, uses reliable.

The purpose of this utility model is achieved in that a kind of constant force spring hanging frame, comprise housing and load pull bar, described housing hollow, the load pull bar is arranged in the described housing, stretch out outside the housing from the bottom of housing load pull bar lower end, load pull bar upper end is fixed with an arm-tie, be provided with some belleville spring groups between described arm-tie and the housing bottom, each belleville spring group is formed by stacking by a belleville spring or several belleville springs, oppositely be provided with between the adjacent two belleville spring groups, the interior cone height of described belleville spring is 1.5-2.0 with the ratio of its thickness, is provided with the limiting stopper that prevents the belleville spring flange between the two belleville spring groups of involutory setting.

When the interior cone height of belleville spring and its thickness than greater than 1.3 the time, the in use easy flange of such belleville spring, in mechanical field, such belleville spring can not use as spring traditionally, but such spring has the zero stiffness characteristic again just, promptly when belleville spring reaches certain load, even the distortion of belleville spring continues to increase, its load also substantially no longer changes, especially interior cone height is the belleville spring of 1.5-2.0 with the ratio of its thickness, its zero stiffness characteristic is fine, its intensity also is unlikely to too low simultaneously, utilizes this characteristic, can be formed in the constant hanger that has big placement property under certain load, but the problem that must solve the unexpected flange of belleville spring simultaneously and flatten suddenly, the utility model adopts limiting stopper to fill segment space between the two belleville spring groups of involutory setting, makes the leeway of the existing distortion of belleville spring, is unlikely to flange or pressing again, the utility model has overcome technology prejudice, has reached beyond thought effect.Compared with prior art, the utility model structure is simpler, and assembling is easy, and low cost of manufacture is used reliable; Invariance degree can reach the technical requirements below 6% of JB/T8130.1-1999 " constant force spring hanging frame ", can be applicable to the various places that need to reduce displacement stress, as the foil portions such as vapour, water, cigarette, airduct and burner of station boiler body, power station, and the place that needs this type of suspention and support in the oil, chemical industry.

Description of drawings

Fig. 1 is the utility model structural representation.

Fig. 2 is the belleville spring structural representation.

Wherein, 1 arm-tie, 2 belleville springs, 3 load pull bars, 4 housings, 5 limiting stoppers, 6 spring seats, 7 bottoms.

Embodiment

As figure, be constant force spring hanging frame, comprise housing 4 and load pull bar 3, housing 4 hollows, load pull bar 3 is arranged in the described housing 4, and stretch out outside the housing 4 from the bottom of housing 4 load pull bar 3 lower ends, and load pull bar 3 upper ends are fixed with an arm-tie 1, be provided with some belleville spring groups between the bottom 7 of described arm-tie 1 and housing 4, described each belleville spring group all has two identical belleville springs 2 be formed by stacking (superimposed be meant that some belleville springs are superimposed in the same way); The interior cone height h of described belleville spring 2 oppositely is set between the adjacent two belleville spring groups ₀With the ratio of its thickness t be 1.5-2.0, its best value is 1.75, is provided with the limiting stopper 5 (involutory setting is meant that the bigger diameter end of belleville spring is provided with in opposite directions) that prevents belleville spring 2 flange between the two belleville spring groups of involutory setting; Leave the gap between limiting stopper 5 and the belleville spring 2,, be unlikely to flange or pressing simultaneously again to guarantee that belleville spring 2 has certain deformation leeway; Be provided with spring seat 6 between described bottom 7 and the immediate belleville spring group.

During work, housing 4 upper ends are connected with external device respectively with load pull bar 3 lower ends, be subjected to when load pull bar 3 under the effect of preload installing force, belleville spring 2 distortion enter zero stiffness characteristic zone, at this moment, although load pull bar 3 elongations change in a big way, it is stressed also to remain unchanged substantially, keeps horizontal tension.

The utility model is not limited to the foregoing description, each belleville spring group can be made of a belleville spring, also can be formed by stacking,, change the size of the load on the load pull bar by structural parameter and the number that changes belleville spring in every group by several belleville springs.

Claims

1, a kind of constant force spring hanging frame, comprise housing and load pull bar, it is characterized in that: described housing hollow, the load pull bar is arranged in the described housing, stretch out outside the housing from the bottom of housing load pull bar lower end, load pull bar upper end is fixed with an arm-tie, be provided with some belleville spring groups between described arm-tie and the housing bottom, each belleville spring group is formed by stacking by a belleville spring or several belleville springs, oppositely be provided with between the adjacent two belleville spring groups, the interior cone height of described belleville spring is 1.5-2.0 with the ratio of its thickness, is provided with the limiting stopper that prevents the belleville spring flange between the two belleville spring groups of involutory setting.

2, a kind of constant force spring hanging frame according to claim 1 is characterized in that: described each belleville spring group all has two identical belleville springs to constitute.

3, a kind of constant force spring hanging frame according to claim 1 is characterized in that: be provided with spring seat between described bottom and the immediate belleville spring group.