KR100379296B1 - Construction of door damping device - Google Patents

Abstract

The present invention provides a door shock absorber for absorbing the impact of the relative movement of the fixed plate 11 and the rotating plate 12 by using the elastic force of the spring 13 and the damping force of the working oil; A housing 20 fixed to the pivoting plate 12 via a holder 37; A shaft 24 having an upper corner portion 24a, a middle collar portion 24b, and a lower spline portion 24c; A fastening member composed of an upper ring 31, a lower ring 32, and an O-ring 33 for coupling the housing 20 and the shaft 24 to the upper end of the spring 13 at the lower end thereof; A slider 25 mounted to the spline portion 24c of the shaft 24, having a spiral on an outer circumferential surface thereof, and joined to a lower end of the spring 13 at an upper end thereof; A retainer 23 mounted in the housing 20 so as to be movable up and down without rotation and helically coupled to the slider 25; A control plate 28 connecting the fixed plate 11 and the shaft 24 via a holder 27 and maintaining a changed position when the shaft 24 is rotated; And a check valve 26 and an adjustment screw 36, and damping adjusting means for controlling the flow resistance of the hydraulic oil through the retainer 23 and the slider 25.

Description

Structure of Door Shock Absorber {CONSTRUCTION OF DOOR DAMPING DEVICE}

The present invention relates to a structure of a door shock absorber, and more particularly, a door shock absorber that improves field adaptability by miniaturizing the overall appearance while performing a shock absorbing operation according to opening and closing of a door by using a spring force and a damping force by hydraulic fluid. It is about the structure.

1 is an exemplary view showing a structure according to an example of a conventional door shock absorber.

The fixing plate 11 coupled to the frame of the door is connected to the shaft 14 by using the holder 17 and the nuts indicated by symbols A and B and always maintains a fixed position regardless of opening or closing of the door. Rotating plate 12 coupled to the door is connected to the housing 10 is rotated integrally in accordance with the opening and closing of the door. The slider 15 is mounted in the housing 10 so as to be movable up and down in a spline structure, and the slider 15 is engaged with the double helix formed on the shaft 14 and supported by the spring 13 at the bottom thereof.

Therefore, when the door is opened at an angle, the rotating plate 12, the housing 10, and the slider 15 are rotated at the same angle with respect to the shaft 14, which is a fixed body, and the slider 15 is lowered in a helical motion with the shaft. . Since the double helix of the shaft 14 has a large helix angle (lead angle), the vertical movement of the slider 15 is maintained smoothly, and the lead according to its descending is proportional to the helix angle. As the slider 15 descends, the compressed spring 13 exerts an elastic force when the door is closed to raise the slider 15 and cause the pivoting plate 12 to return to its original position.

At this time, the inner space of the housing 10 is divided up and down by the slider 15 and the hydraulic oil is filled therein. In the vertical movement of the slider 15, the hydraulic oil moves through a separate flow path in which the spline gap of the slider 15 and the control valve 16 are installed to act as a damping force so that the door closes slowly without impact. The control valve 16 serves to adjust the damping force by changing the flow path cross-sectional area.

However, according to such a configuration, the main functional parts mounted in the housing 10 occupy separate spaces separately, and the height of protruding to the upper part of the fixing plate 11 is high, and there is much room for improvement in miniaturizing the appearance according to site conditions. .

In addition, in order to set the initial elastic force in the assembly should be used by adding a screw of the sign 18, there is a disadvantage that the adjustment operation is inconvenient, such as loosening and tightening a plurality of nuts (A) (B) in case of changing the elastic force during use.

Accordingly, the present invention is to solve the above-mentioned disadvantages, while using the damping force by the spring and the damping force by the oil to perform the buffer operation according to the opening and closing of the door buffer to improve the field adaptability by miniaturizing the overall appearance Its purpose is to provide a structure.

Another object of the present invention is to be able to easily adjust the hydraulic pressure of the door shock absorber or the non-clamping force of the spring.

Still another object according to the present invention is to allow the housing constituting the door shock absorber to be molded by an extrusion method so that the production can be easily performed.

1 is an exemplary view showing a structure according to an example of a conventional door shock absorber,

2 is an exploded perspective view illustrating a door shock absorber according to the present invention;

3 is a configuration diagram showing a cross-sectional view of the assembled state of FIG.

(Symbol description for main parts of drawing)

11: fixed plate 12: rotating plate

13: spring 20: housing

23: Retainer 24: Shaft

25: slider 26: check valve

27, 37: holder 28: throttle

36: adjusting screw

In order to achieve the above object, the present invention provides a door shock absorber for absorbing the shock caused by the relative movement of the fixed plate (11) and the rotating plate (12) by using the elastic force of the spring (13) and the damping force of the hydraulic oil; A housing 20 fixed to the pivoting plate 12 via a holder 37; A shaft 24 having an upper corner portion 24a, a middle collar portion 24b, and a lower spline portion 24c; A fastening member composed of an upper ring (31), a lower ring (32) and an O-ring (33) for coupling the housing (20) and the shaft (24) and joined to an upper end of a spring (13) at a lower end thereof; A slider 25 mounted to the spline portion 24c of the shaft 24 and having a spiral on an outer circumferential surface thereof and joined to a lower end of the spring 13 at an upper end thereof; A retainer 23 mounted in the housing 20 so as to be movable up and down without rotation and helically coupled to the slider 25; A control plate 28 connecting the fixed plate 11 and the shaft 24 via a holder 27 and maintaining a changed position when the shaft 24 is rotated; And a check valve 26 and an adjustment screw 36, and damping adjusting means for controlling the flow resistance of the hydraulic oil through the retainer 23 and the slider 25.

As another feature of the invention, the throttle plate 28 has a spline 28a which engages in a plurality of rotational positions with the square portion 27a of the holder 27.

As another feature of the present invention, the damping control means includes a cap 35 having an internal flow path 35a, and is primarily regulated by a check valve 26 installed at an upper end of the cap 35, and a cap ( Second adjustment is made with the adjustment screw 36 installed on the bottom of 35).

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a perspective view showing the disassembled door shock absorber according to the present invention, Figure 3 is a block diagram showing the assembled state of Figure 2 in a partially cut section.

The present invention is a door shock absorber that absorbs the impact of the relative movement of the fixed plate 11 and the rotating plate 12 by using the elastic force of the spring 13 and the damping force of the working oil, the fixed plate 11 and the shaft 24 It is the same as the conventional structure in which the rotating plate 12 and the housing 20 is coupled, the spring 13, the retainer 23, the slider 25 in the relative movement of the housing 20 and the shaft 24 Is interlocked to absorb shocks.

Holder 37 is used to couple the rotating plate 12 and the housing 20. The holder 37 is formed in a hexagonal shape as shown by the reference numeral 37a at the lower end thereof, and then coupled to the upper end of the housing 20 to be fastened with bolts, thereby restraining the relative movement of the pivoting plate 12 and the housing 20.

The shaft 24 according to the present invention has an upper corner 31a, an upper collar 31b, an intermediate collar 24b, and a lower spline 24c, and an upper ring 31, a lower ring 32, and an O-ring ( It is mounted on the housing 20 by a fastening member consisting of 33). The upper ring 31 and the lower ring 32 have a structure for accommodating the collar portion 24b of the shaft 24, and a spiral is formed on the outer circumferential surface thereof and is coupled to the housing 20. And the lower end of the lower ring 32 in the fastening member is joined to the upper end of the spring (13).

Further, according to the present invention, a slider 25 having a spiral on an outer circumferential surface is mounted to the spline portion 24c of the shaft 24. The outer circumferential surface of the slider 25 has a double helix structure with a large spiral angle as in the prior art. The upper end of the slider 25 is joined to the lower end of the spring 13. Therefore, unlike shown in FIG. 2, the spring 13 is integrated with the slider 25 at the lower end of the lower ring 32 at the upper end, and is put into assembly.

In addition, according to the present invention, the retainer 23 coupled to the slider 25 to be helically movable is mounted in the housing 20 so as to be able to move up and down without rotation. The retainer 23 is constrained relative to the housing 20 by a splined C-shaped jaw 23b formed perpendicular to the outer circumferential surface thereof. Reference numeral 23a denotes a double helix like the outer circumferential surface of the slider 25.

Accordingly, when the door is opened at a predetermined angle, the rotating plate 12 is rotated at the same angle with the housing 20 and the retainer 23, and the vertical rise of the slider 25 is induced by the rotation of the retainer 23. do. Therefore, when the door is opened, the slider 25 is engaged with the shaft 24 to compress the spring 13 while vertically moving in a state in which the rotation is constrained. When the door is closed, the slider 25 is moved by the elastic force of the spring 13. The operation of lowering and rotating the rotating plate 12 in the reverse direction is performed.

However, in the present invention, since the spring 13 is installed on the shaft 24, it is possible to reduce the overall height of the housing 20 by that much compared to the configuration connected in series as in the prior art.

In addition, according to the present invention, the adjustment plate 28 which maintains the changed position during rotation of the shaft 24 connects the fixing plate 11 and the shaft 24 via the holder 27. The holder 27 is engaged with the square portion 24a of the shaft 24 and is capable of relative rotational movement with another holder 37 supporting the pivot plate 12. This adjusting plate 28 has a spline 28a which engages in a plurality of rotational positions with the square portion 27a of the holder 27. The holder 27 rests on the fixing plate 11 so that only the corner portion 27a is exposed on the upper surface of the fixing plate 11. The throttle plate 28 is mounted on the fixed plate 11 using at least two bolts.

As described above, the spring 13 is fixed to the lower ring 32 and the slider 25 so that the torsional stress does not work during normal door operation. However, if the upper end of the shaft 24 is forcibly rotated, the slider 25 is the same. Torsional elasticity is generated while rotating at an angle. This operation is performed when the shock absorber of the present invention is mounted on the door and then the initial action force is applied to the groove formed at the top of the holder 27 in the state in which the adjusting plate 28 is released. After rotating the 24, the control plate 28 is lowered so that the holder 27 is caught by the spline 28a and the bolt is tightened again to maintain the rotated position of the shaft 24. In this process, it is not necessary to release the bolt to completely remove the throttle 28.

According to such a configuration, since the portion protruding to the upper portion of the fixing plate 11 is not high and the shaft 24 is not moved when the initial action force is added, it is advantageous in terms of applying it to the installation site having various conditions without difficulty. Loosen the bolts of the adjusting plate 28 only slightly, turn the holder 37 and the shaft 24, and then press the adjusting plate 28 so that the operation is easy at the time of initial installation or when changing the operating force after installation.

In addition, according to the present invention is provided with a damping control means composed of a check valve 26 and the adjustment screw 36, to control the flow resistance of the hydraulic oil through the retainer 23 and the slider 25. As described above, in the related art, separate flow paths should be formed on the lower side and the side surface of the housing 10, but the housing 20 of the present invention has a flow path formed therein, thereby simplifying the structure and reducing the appearance.

At this time, the damping control means of the present invention includes a cap 35 having an internal flow path (35a), the primary control by the check valve 26 is installed on the top of the cap 35, the lower end of the cap 35 Secondary adjustment with the adjusting screw 36 is installed. The circulating flow path of the hydraulic oil is composed of a space in which the spring 13 is installed, a gap between the slider 25, an internal flow path 35a of the cap 35, and a gap between the outer circumferential surface of the retainer 23. The C-shaped jaw 23b of the retainer 23 can form a sufficient flow path up and down. The damping force according to the opening and closing of the door is adjusted by adjusting the working pressure on the flow path with the check valve 26 and changing the cross-sectional area of the flow path with the adjustment screw 36 to vary the flow resistance.

In assembly, the holder 27 and the adjusting plate 28 together with the fixing plate 11 are fixed to the frame of the door, and the rotating plate 12 with another holder 37 inserted into the holder 27. To the door. Next, the upper ring 31, the lower ring 32, and the O ring 33 are mounted on the shaft 24. At this time, the spring 13, the slider 25, and the retainer 23 are also mounted at the same time so as to integrate the assembly. Becomes This assembly is mounted in the housing 20 and then the top of the housing 20 is inserted into the holder 37 and fastened with bolts. Next, the check valve 26 is pushed into the slider 25 at the lower end of the housing 20, and the cap 35 is fastened, and the adjusting screw 36 is fastened on the cap 35 to complete the assembly.

The above operation is performed with the door slightly open, so that the closing force of the door does not work. Therefore, as described above, slightly loosen the throttle plate 28, rotate the holder 27 and the shaft 24 to generate a torsional stress on the spring 13, and then assemble the throttle plate 28 to close the door smoothly.

In operation, as the spring 13 is compressed and the elastic energy is accumulated when the door is opened, the hydraulic oil in the upper space is lowered through the check valve 26 by the rising of the slider 25. do. Of course, the C-shaped jaw 23b of the retainer 23 becomes a flow path, and the flow path is extremely limited between the retainer 23 and the slider 25 by a piston action. Even if the opening speed of the door is high, the check valve 26 is opened to increase the amount of downward flow of the hydraulic oil, so that operation is not difficult or hindered.

On the other hand, when closing the door, the elastic energy of the spring 13 is used to increase the speed of the door, but the upward movement of the hydraulic oil is blocked by the check valve 26, so that the hydraulic oil is moved to the other part described above and the damping action is performed to speed up. Decreases. As it is well known, the damping force is proportional to the flow velocity of the hydraulic oil, so that the reaction occurs in proportion to the increase in the speed of the door, thereby cushioning it.

In the present invention, the set pressure of the check valve 26 is also changed by loosening and tightening the cap 35 in addition to replacing the spring, the flow path cross-sectional area is changed depending on the degree of loosening and tightening the adjustment screw 36. Since this operation can be performed at the bottom of the housing 20, the adjustment operation is easy.

The housing 20 may be molded by an extrusion method so that the same inner diameter is maintained along the longitudinal direction.

In addition, according to the embodiment of the present invention, the spring 13 is formed with a groove 25a so that the end of the spring 13 can be fixed to the upper surface of the slider 25 so that not only the compressive force but also the torsional force can be provided. And it will be possible to form a groove (32a) so that the end of the spring 13 can be fixed to the bottom of the lower ring 32 of the fastening member.

In addition, the outer circumferential surface of the slider 25 and the inner circumferential surface of the retainer 23 may be rotatably coupled to each other by ball contact, and may be moved up and down, and the spline portion 24c of the shaft 24 and the slider ( 25 is screwed so that the rotation can be raised, the slider 25 and the retainer 23 will be able to be combined so that the rotation is prevented and can be raised and lowered.

According to the above configuration and action, the present invention has the effect of improving the field adaptability by miniaturizing the overall appearance while performing the buffer operation according to the opening and closing of the door by using the spring force and the damping force by the working oil.

In addition, the housing constituting the conventional door shock absorber was produced by the die casting method, it was necessary to rework the inner diameter of the housing according to the subtraction gradient of the core, but the present invention is the mass production as well as the production by the extrusion method of the housing In addition to the increase in strength than the die-casting method, the length of the housing can be adjusted.

It is apparent to those skilled in the art that the present invention is not limited to the described embodiments, and that various modifications and variations can be made without departing from the spirit and scope of the present invention. Therefore, such modifications or variations will have to belong to the claims of the present invention.

Claims (8)

In the door shock absorber mounted on the door and the door frame to absorb the impact of the relative movement of the fixed plate 11 and the rotating plate 12 by using the elastic force of the spring 13 and the damping force of the hydraulic oil; A housing 20 fixed to the pivoting plate 12 via a holder 37; A shaft 24 having an upper corner portion 24a, an intermediate collar portion 24b, and a lower spline portion 24c; A fastening member composed of an upper ring 31, a lower ring 32, and an O ring 33 for coupling the housing 20 and the shaft 24 to the upper end of the spring 13 at the lower end thereof. Wow; A slider (25) mounted to the spline portion (24c) of the shaft (24), having a spiral on an outer circumferential surface, and joined to a lower end of a spring (13) at an upper end thereof; A retainer (23) mounted in the housing (20) so as to be movable up and down without rotation, and helically coupled to the slider (25); An adjustment plate 28 connecting the fixed plate 11 and the shaft 24 via a holder 27 and maintaining a changed position when the shaft 24 is rotated; And And a damping regulating means for controlling the flow resistance of the hydraulic oil through the retainer (23) and the slider (25). The method of claim 1, The control plate (28) is a structure of the door shock absorber, characterized in that it has a spline (28a) for engaging the plurality of rotational positions with the square portion (27a) of the holder (27). The method of claim 1, The damping control means includes a cap (35) having an internal flow path (35a), the primary control by the check valve 26 is installed on the top of the cap 35, the adjustment is installed on the bottom of the cap 35 The structure of the door shock absorber, characterized in that the secondary control with a screw (36). The method of claim 1, The structure of the door shock absorber, characterized in that the upper and lower ends are fixed to the fastening member and the slider (25) so that the spring (13) has a torsional force. The method of claim 1, Structure of the door shock absorber, characterized in that the housing 20 is molded by the extrusion method. The method of claim 1, The outer circumferential surface of the slider 25 and the inner circumferential surface of the retainer 23 can be rotatably coupled by ball contact. The method of claim 1, The spline portion 24c and the slider 25 of the shaft 24 are screwed together to be rotated up, and the slider 25 and the retainer 23 are coupled to each other so that the rotation is prevented and raised and lowered. Structure of door shock absorber. The method of claim 1, The structure of the door shock absorber, characterized in that to form a C-shaped jaw (23b) so that the flow path is formed on the outer peripheral surface of the retainer (23) up and down.