CN2171663Y

CN2171663Y - Damping door catapult

Info

Publication number: CN2171663Y
Application number: CN 93226290
Authority: CN
Inventors: 张明泉
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-09-07
Filing date: 1993-09-07
Publication date: 1994-07-13
Anticipated expiration: 2003-09-07

Abstract

The utility model relates to a damping door catapult by which a door leaf can be automatically rotated to a closed position and can be prevented from impacting a door frame. The utility model is characterized in that a set of damping catapult mechanism which connects the door frame and the door leaf is arranged between a big bracket on the door frame and a small bracket on the door leaf. The damping catapult mechanism comprises a pressure equalizing spring, a pressure equalizing piston, a piston rod and a piston cylinder filled with damping oil, wherein, the piston cylinder is fixedly connected to the big bracket of the door frame, the root of the piston rod of which the rod part is sheathed with an offsetting spring is fixedly connected to the small bracket of the door leaf, and the rear part of a piston head of the piston rod which is sealed and matched in the piston cylinder in a sliding mode is provided with a valve body for limiting the flow of the damping oil in an appressed mode. The utility model can have the function of automatic closing for the door leaf, and simultaneously the door frame can not be impacted by the door leaf when a door is closed for reducing noise to small extent.

Description

Damping door catapult

The utility model relates to the door and window part, is a kind of device that makes door leaf can be automatically brought to fastening position and prevent the door leaf knocking door case.

Existing a kind of device that door leaf cuts out automatically is referred to as a catapult, it by be fixed on big support on the doorframe, be arranged on spring and the strut on this support, the small rack that is fixed on the door leaf constitutes, during installation, the big support of the strut that spring is housed is fixed on the doorframe, and the elastic force of the spring of strut is pressed on the small rack of door leaf.The door catapult of this structure, structure is comparatively simple, but this structure is after removing the external force of opening the door, door leaf is promptly under the effect of spring restoring force, immediately close the door automatically and the phenomenon of doorframe takes place fiercely to collide, send strong noise, not only door is fragile, and want frightened people, harmful mental health.

The purpose of this utility model provide a kind of can self-closing doors fan, can make again at closing time simultaneously that door leaf does not impact doorframe, noise is reduced to the damper door catapult of not half.

The utility model that achieves the above object is, the same with prior art, the utility model includes and is fixed on big support, back-moving spring, the strut on the doorframe and is fixed on small rack on the door leaf, characteristics of the present utility model are that the damping catapult mechanism that a cover includes equal pressing spring, balance piston, piston rod and is filled with the piston cylinder of damping oil is being set between big support and small rack, and balance piston and piston cylinder sealed sliding are joined and are seated in and be positioned on the equal pressing spring in piston cylinder one end; Piston rod is a stock piston rod with piston head among the design, the piston head sealed sliding fits in the piston cylinder, have the oil circuit that the piston head both sides are communicated on the piston head, and in the first distolateral bar portion of piston, be close to and be with the valve body that constitutes by valve seat and valve pocket that can be free to slide thereon, and make and have a slit δ between valve pocket end and piston head end face; The root of piston rod is fixed on the small rack of door leaf, and is nested with back-moving spring in the bar portion of this piston rod, and back-moving spring one end holds in the piston cylinder end, and the other end holds on small rack.

Damper door catapult as mentioned above, when door leaf is opened under external force, piston rod is together with damping mechanism on the one hand, rotate and rotate with door leaf around the center of rotation of big support, piston rod is done axially-movable towards big holder orientation simultaneously, at this moment back-moving spring is compressed, and the back cavity that the damping oil in the piston cylinder enters piston cylinder by the oil circuit on the piston head promotes valve body and moves backward, this moment, slit δ increased, therefore strengthened the passage of damping oil towards back cavity, reduced damping force, so resistance reduces when opening the door.Because the length of piston rod in piston cylinder constantly increases (the oil storage volume-diminished in piston forward chamber), forms malleation in piston cylinder, this malleation promotes the balance piston motion and compresses equal pressing spring, makes the pressure in the piston cylinder basicly stable.After external force disappears, the restoring force of back-moving spring is ordered about piston rod and is withdrawed from piston cylinder, this moment piston rod piston head compression piston tube back cavity in damping oil, damping oil promotes valve body on the one hand and moves to the piston head direction, slit δ progressively diminishes, and damping oil slowly enters the piston cylinder ante-chamber by the oil circuit in the piston head on the other hand.

For reducing the resistance of the utility model when opening door leaf, when design, can do specially treated to the inner chamber of piston cylinder, make one section tapered structure of inner chamber in the middle of it, and with the piston head of balance piston and piston rod mutually the sealed sliding part of joining be straight tubular construction.The result of Chu Liing is like this, when opening the door, when piston rod to balance piston direction motion (inwardly stretching) arrive a section of tapering is arranged on piston cylinder after, the space of most of damping oil circle in the piston head outer ring of piston rod and the piston cylinder is by the back cavity of through piston cylinder, so resistance further reduces, so the damping force when opening the door is very little; Automatically at closing time, the piston head of piston rod still is positioned at the conical section of piston cylinder during because of beginning, when the piston rod reversion, damping oil in the piston cylinder back cavity can be from the cylindrical of piston head by passing back into the ante-chamber of piston cylinder, so resistance is still very little, the closing velocity of door leaf is very fast, have only when door leaf when the distance of doorframe is very near, the conical section that the piston head of piston rod has just passed through piston cylinder fully enters the cooperation section, damping oil in the back cavity can only just can enter ante-chamber by slit δ and oil circuit, at this moment the closing velocity of door leaf just slows down voluntarily, surely by doorframe.

Temperature Change throughout the year is bigger, because the variation of room temperature can make the damping oil viscosity change, makes the damping capacity instability.For keeping the stability of the utility model functional performance better, the utility model is made adopting the big engineering plastics of linear expansion coeffcient in the design of valve pocket, make it when room temperature raises, the elongation of valve pocket length, slit δ diminishes, otherwise valve pocket can shorten voluntarily when room temperature reduces, and slit δ increases, and the size of damping can be stabilized in the scope of a certain permission like this.

Therefore, because the utility model has adopted a cover cylinder type damping mechanism, the motion that drives door leaf and change the piston rod that closes is subjected to that the flow regime of damping oil influences in the piston cylinder, when being nested with under the effect of the back-moving spring on the piston rod at closing time, piston rod progressively withdraws from from piston cylinder, the slit δ that is nested with between valve body on the piston rod and piston head end face progressively reduces, then damping oil strengthens by the resistance of this δ, the motion of piston rod is obstructed, speed slows down, and door leaf just can only gently lean on upper door frame just can not send hitting sound.

Embodiment of the present utility model now further is described specifically the utility model as shown in drawings in conjunction with the accompanying drawings.

Description of drawings:

Fig. 1 is the utility model longitudinal sectional view.

Fig. 2 is the sectional view of the piston head portion of piston rod in the utility model.

Fig. 3 is for being nested with the forward sectional view of the valve seat on piston rod in the utility model.

Fig. 4 is the left side view of Fig. 3.

Fig. 5 is for being engaged in the forward sectional view of the valve pocket on the valve seat shown in Figure 4 in the utility model.

Fig. 6 is the state diagram of the utility model device on door.

See also Fig. 1, present embodiment includes the big support 1, the back-moving spring 14 that are fixed on the doorframe, play the piston rod 17 of strut effect and be fixed on small rack 15 on the door leaf.Damping mechanism device in present embodiment back in bonnet 3 is fixed on the big support 1 on the doorframe with bearing pin 2, and to be roots be fixed on the small rack 15 on the door leaf with bearing pin 16 piston rod 17.Damping mechanism is by piston cylinder 8, and the equal pressing spring 4 of device in piston cylinder 8 has the balance piston 6 of sealing ring 5,9 and the piston head 19 of piston rod 17 and the valve body that is nested with on piston rod 17 and constitute.Piston cylinder 8 in the present embodiment is divided into three sections with its internal diameter size, and the part that is positioned at big support 1 end on the doorframe is straight-cylindrical enlarged diameter section, wherein is equipped with equal pressing spring 4 and balance piston 6, and balance piston 6 is seated on the equal pressing spring 4; The part that is positioned at small rack 15 directions on the door leaf is straight-cylindrical reduced diameter section, wherein is equipped with the piston head 19 of piston rod 17; The interlude of piston cylinder 8 is a conical section, wherein is filled with damping oil 7.See that by figure the worker on the piston head 19 is shaped in order to connect on the piston rod 12 and is equipped with the valve body that is made of valve seat 11 and valve pocket 10, also is installed with a circlip 12 apart from a distance, valve body rear portion.As Fig. 3, the valve seat 11 in the present embodiment shown in Figure 4 is the cylinder that has two spikes 20, can hold on the side of piston head 19 by its two spikes 20 again after it slides on the piston rod 17 with internal diameter, and the space that two spikes are 20 is the flow channel of damping oil 7; As shown in Figure 5, valve pocket 10 is the cylindrical shape that has foundation ring 21, it is configured on valve seat 11 peripheries with internal diameter, table contacts with the end face of valve seat 11 in the foundation ring, and make between the side of the end face of this valve pocket 10 and piston head 19 and have a slit δ, in the present embodiment, this valve pocket is made with the big engineering plastic materials of linear expansion coeffcient.See by Fig. 1, back-moving spring 14 is nested with on piston rod 17, and make the one end hold end at piston cylinder 8, the other end holds on small rack 15, then open with door leaf and during indentation piston cylinder 8 when piston rod 17, back-moving spring 14 is compressed, and when the external force of opening the door disappeared, its restoring force of back-moving spring 14 forced piston rod 17 to stretch out from piston cylinder.13 is sealing ring among the figure.

Fig. 6 is the utility model by the state of device after on the door, and this is the closed condition of door leaf.

Claims

1, a kind of damper door catapult, include big support (1), the back-moving spring (14) that is fixed on the doorframe and be fixed on small rack (15) on the door leaf, it is characterized in that between big support (1) and small rack (15), being provided with the damping catapult mechanism that a cover includes equal pressing spring (4), balance piston (6), piston rod (17) and is filled with the piston cylinder (8) of damping oil (7), wherein:

A. balance piston (6) and piston cylinder (8) sealed sliding are joined and are seated in and be positioned on the piston cylinder equal pressing springs in (8) one ends (4);

B. piston rod (17) is a stock piston rod with piston head (19), piston head (19) sealed sliding fits in the piston cylinder (8), have the oil circuit (18) that the piston head both sides are communicated on the piston head (19), and in the distolateral bar portion of piston head (19), be close to and be with the valve body that constitutes by valve seat (11) and valve pocket (10) that can be free to slide thereon, have a slit δ between valve pocket (10) end and piston head (19) end face;

C. the root of piston rod (17) is fixed on the small rack (15) of door leaf, and is nested with back-moving spring (14) in the bar portion of this piston rod (17), and back-moving spring (14) one ends hold in piston cylinder (8) end, and the other end holds on small rack (15).

2, according to the described damper door catapult of claim 1, it is characterized in that said piston cylinder (8) one section tapered structure of inner chamber in the middle of it, and with the piston head (19) of balance piston (6) and piston rod (17) mutually the sealed sliding inner chamber of joining be straight tubular construction.

3,, it is characterized in that said valve pocket (10) makes with the big engineering plastics of linear expansion coeffcient according to claim 1 or 2 described damper door catapults.