CN2042107U - Door closer - Google Patents

Abstract

The utility model relates to a novel door closer, which is provided with an energy storage torsion spring, a damping oil cylinder, a crank, a connecting rod, etc. The damping oil cylinder is driven by a multi-head screw pair. The energy storage torsion spring and the damping structure of the utility model are arranged on one axial line, and the self actions are directly connected with the same rotating shaft. The utility model has the advantages of compact structure, small size, simple manufacturing process and low cost.

Description

Door closer

The utility model relates to closes the door and buffer automatically, belongs to the technical field of architectural hardware machinery.

The door in house is difficult to close in people's turnover process or under the influence at wind sometimes, produces sometimes and impacts.Solve the approach of this class problem, such as employing " door catapult " and " hydraulic pressure closes a hinge " etc., but the most appropriate way then is to adopt " door closer ".Common door closer is made up of piston, gear, rotating shaft, rocking bar and the connecting rod etc. of stage clip, oil cylinder, band tooth bar.Closing of door is to discharge potential energy by stage clip, forces piston to move, and by gear driven rocking bar and connecting rod door pulled to doorframe again.When piston moved, compressing oil passed through from aperture, thereby reached the purpose of buffering.Both axis cross one another because the supporting capacity of rack-and-pinion is relatively poor, add that the dimension scale of its rod member and configuration state thereof are not the most favourable to the expansion of closing a moment.These problems have brought the structure of former door closer comparatively complicated, and size is bigger, and the defective that manufacturability is relatively poor, cost is higher is given to promote the use of and brought certain difficulty.

The utility model provides a kind of service behaviour that can keep former door closer for people, and the novel door closer that its structure is compact, manufacturability better, cost is lower.

One of design of the present utility model is: generally speaking, allow part place the machine of same axis, its structure is often compact, and manufacturability also will be better.Replace the rack-and-pinion of former door closer with screw pair, will screw with oil cylinder, make the motion that is in line of the rotation motion of rotating shaft, again the stage clip of former door closer is reversed the torsion spring of accumulation of energy instead, be arranged on the periphery of oil cylinder as the piston of damping main part.Structure through change will be coaxial like this.

Two of design is: from " theory of mechanics " as can be known, oppositely the speed ratio of two crank-motions changes in the double-crank mechanism.If on door closer, and the part position that allows mechanism have than the big retarding ratio just matches with closing a position, can reach like this with less torsion spring moment of torsion to exchange the purpose of closing a moment more greatly for this principle, thereby the size of door closer is further reduced.

Accompanying drawing one is the structural representation of the shank of a case study on implementation of the utility model.Wherein: 1. fixing spline; 2. adjusting rod; 3. be with externally threaded piston; 4.0 RunddichtringO; 5. tapped oil cylinder, 6. torsion spring; 7. shell; 8,9,10. unidirectional valve member; 11. anti-backlash; 12. regulating sleeve; 13. ball; 14. ball base; 15.0 RunddichtringO; 16. crank; 17. key.

Accompanying drawing two, three is the scheme of installation of the utility model, wherein: 18. doorframes; 19. free bearing; 20. door; 22. door closer main body; 16. crank, 21. connecting rods.

Below in conjunction with accompanying drawing this case is narrated.

At first see accompanying drawing one, when crank 16 is done clockwise direction (seeing at oil cylinder and crank link) rotation under external force, by the connection of key 17, piston 3 is in the effect of screw pair and fixedly move up under the constraint of spline 1, and the oil of upper space enters lower room by one way valve 8; Regulating sleeve 12 is rotated, tightened torsion spring 6, make it put aside potential energy, at this moment door closer is in door opening state; After external force is removed, torsion spring 6 releases energy, on the one hand the oil cylinder of inner wall belt multiple-internal screw thread is rotated, force the externally threaded piston 3 of outer wall belt bull to move down, because this moment, one way valve was closed under the oil pressure effect, the passage of upper space can be made to lead in the gap that the oil of lower space has only between adjusting rod 2 and piston 3 endoporus, thereby piston 3 is moved slowly, and the size of its speed can change above-mentioned gap length and regulate by the change of adjusting rod upper-lower position; Also make crank 16 do counterclockwise to rotate on the other hand, door is closed.

The action of crank and all the other rod members and its effect can accompanying drawings two, three.

The door closer body is fixed on the door of being adorned, and one of annex of door closer--free bearing 19 is fixed on the corresponding doorframe.Like this, two appended rod members of door closer have constituted four-bar mechanism with door and the doorframe adorned: the AB of doorframe is partly as one of crank, and the annex CD of door closer is as two of crank, and they are isometric; The AD of door partly can be used as support with regard to the relativity of motion, accessories B C is as connecting rod, and both equate the back again.In addition, crank AB and DC are placed in the both sides of support AD respectively.Above-mentioned four bars have promptly constituted " oppositely double-crank mechanism ".From figure three as seen, as in the direction of the clock door having been opened the β angle, then crank DC will be thereupon in the direction of the clock with respect to the door AD rotation (angle of φ-α).Here will have two kinds of situations to occur in succession:

(1) less when the β angle, promptly near door is in the closed position, formula: φ-α＞β is arranged then shown in figure three.From theory of mechanics as can be known, at this moment torsion spring moment of torsion that crank DC is done will be generally by (multiplying power of φ-α)/β is less than the opplied moment of external force around door hinge A opposite house, so also just reached become less the torsion spring moment of torsion into closing the purpose of a moment more greatly.

(2) when the opening angle β of door is big, reverse situation will appear, i.e. φ-α＜β, though at this moment torsion spring has been in the state of tightening, external force can be opened bigger angle to door with less power.This performance also will be that the user seeks for.

According to the above, the utlity model has characteristics rational in infrastructure, that technology simple, cost is lower, be a kind of novel door closer that big market potential is arranged.

Claims (3)

1, is provided with energy-storaging spring and unidirectional oil damping device and the additional door closer that two rod members are arranged in a kind of body, it is characterized in that oil cylinder and piston in the damping unit are spun together by multiple thread, energy-storaging spring is the torsion spring that reverses accumulation of energy, is arranged on the periphery of oil cylinder.

2, door closer according to claim 1 is characterized in that two rod members that added--crank links to each other with hinge with the door and the doorframe of this door closer of device with connecting rod, and has formed reverse double-crank mechanism.

3, door closer according to claim 1 is characterized in that oil cylinder inner wall has multiple-internal screw thread, and piston outer wall has the bull external screw thread.

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