KR101312585B1 - Door hinge - Google Patents

Abstract

The door hinges include external and internal door hinge units with attachments for securing to the door frame or door. The outer door hinge unit includes two first cylindrical bearing portions fixed thereto. The inner door hinge unit includes a fixed second cylindrical bearing portion. The second cylindrical bearing part is located between the two first cylindrical bearing parts. The first cylindrical bearing portion is coaxial with the second cylindrical bearing portion. Inside each first cylindrical bearing portion a first bearing bushing and a second bearing bushing are installed. A ball is located between the first bearing bushing and the second bearing bushing. Bolts are arranged between the first bearing bushings facing each other. The body of the bolt passes through the second cylindrical bearing portion of the inner door hinge unit, the upper and lower shafts of the bolt are received in the grooves of the first bearing bushing, and the bolt is connected with the second cylindrical bearing portion.

Door, hinge

Description

Door hinge {DOOR HINGE}

1 is a partial cross-sectional view of a door hinge according to the present invention,

2 is a cross-sectional view of the entire door hinge, and

3a and 3b show the door hinge receptacles of the present invention for two-dimensional placement of the doors;

The present invention relates to a door hinge that can be easily rotated, wears well and is easy to maintain.

Current door hinges generally consist of an inner and outer hinge unit with fastenings for fastening to the door and the door frame, the inner door hinge unit being installed between two or more bearing portions in the outer hinge unit, the bearing portion It is exposed to the outside. Theoretically, current hinge technology includes bearings for absorbing axial and radial friction. However, because the inner and outer bearing design is impractical, when the inner hinge unit rotates, other parts except the bearing must also withstand axial and radial friction from the door. If the hinge unit is not assembled precisely or used for a long time, it will cause an unbalanced distribution of force on the hinge. As a result, the hinge becomes worn and difficult to rotate, and its life is shortened. For heavy doors, the hinges generally need to be replaced. This is inconvenient for us.

The German patent DE-OS 24 12 725 discloses a door hinge of this type, which has the disadvantage of being excessively worn because the hinges and bearing grooves are made of steel. In addition, the bearing groove is usually inclined so that when the rotating part has a ball-like shape, there is only a narrow circular contact surface between the rotating part and the bearing groove, which causes excessive wear. As the contact surface increases, it is natural for excessive friction to occur, so the door hinges wear out and become difficult to rotate.

The present invention has been invented to solve the above problems, and an object of the present invention is to provide a door hinge that can be easily rotated, not worn well and is easy to maintain.

In order to achieve the above object, the hidden ball bearing door hinge of the present invention is composed of an inner door hinge unit and an outer door hinge unit having a fixing portion for fixing to the door and the door frame, the inner door hinge unit is connected to the outer door hinge unit It is located between two or more cylindrical bearing parts. There is a steel ball between the first and second bearing bushings. The door hinge further comprises a bearing bolt and an adjusting screw for pressing the bearing portion against each other. The adjusting screw can be screwed into the bearing part. The second bearing bushing is under opposing pressure from the ball in the opposite direction of the first bearing bushing. In addition, the bearing bolts connect the outer and inner hinge units.

Due to the special engineering plastic POM PTFE for bearing bushings, the bushing has a smooth surface, elasticity, low coefficient of friction, and the ball is made of steel to minimize wear. At this time, the ball and the sphere provide a wider contact surface, resulting in a lower coefficient of friction. Due to the high strength of the POM, the bearing performance is very ideal, and the hinge hardly wears out, making maintenance easy. In addition, an adjustment screw is provided for the bearing to operate so that the door hinge rotates easily.

Other advantages and features are given by way of non-limiting example but will be more clearly apparent from the following description of embodiments of the invention which are represented in the accompanying drawings.

1 shows a partial cross section of a door hinge according to the invention, and FIG. 2 shows a cross section of an entire door hinge.

1 and 2, the door hinge is composed of an outer door hinge unit 1 and an inner door hinge unit 2. The outer door hinge unit 1 comprises two fixed first cylindrical bearing portions 1a, and the inner door hinge unit 2 has a fixed second cylindrical bearing portion composed of a rounded thin wall structure 9 ( 2a). The second cylindrical bearing portion 2a is located between the two first cylindrical bearing portions 1a, and the first cylindrical bearing portion 1a is coaxial with the second cylindrical bearing portion 2a. The bearing bolt 3 connects the outer bearing portion 1a and the inner bearing portion 2a. The bearing bolt 3 is an elongated cylindrical shaft with three outer contours, i.e. the body 33 for the intermediate connection, the upper shaft 31 and the lower shaft 32. The diameters of the upper shaft 31 and the lower shaft 32 are smaller than the diameter of the body 33 for intermediate connection. The contour areas of the upper and lower parts of the connecting body 33 for the intermediate part of the bearing bolt 3 partially contact the inner contour 1b of the first bearing part 1a. The middle region of the connecting body 33 of the bearing bolt 3 is pressed against the inner hole of the second bearing portion 2a by pressure fitting.

Of course, the bearing bolt 3 can instead be connected to the second bearing part 2a by means of an additional bolt 40 which extends radially through the bearing bolt 3 and the second bearing part 2a.

The upper shaft 31 and the lower shaft 32 of the bearing bolt 3 are inserted into the cylindrical inner groove 4b of the first bearing bushing 4. The bearing bolt 3 and the first bearing bushing 4 are integrated assemblies. The upper and lower shafts 31 and 32 of the first bearing bushing 4 and the bearing bolts 3 are fixed to each other.

The first bearing bushing 4 and the second bearing bushing 6 both have a cylindrical outer contour, and the cylindrical outer contour of the first bearing bushing 4 and the second bearing bushing 6 has a first bearing portion ( It fits precisely into the inner contour 1b of 1a). The ball 5 is made of steel and the first bearing bushing 4 and the bearing bushing 6 are made of special engineering plastic POM PTFE. The adjusting screw 7 with the outer screw is engaged with the inner screw of the first bearing portion 1a. The first bearing bushing 4 has a hemispherical inner contour 4a, the second bearing bushing 6 has a hemispherical inner contour 6a and the ball 5 is supported within the entire hemispherical inner contour. In addition, the concave blind holes 4b, 6b opposite the hemispherical inner contours of the first bearing bushing 4 and the second bearing bushing 6 have a convex surface 7a of the adjusting screw 7 and a bearing bolt 3. Is used to support the upper / lower shafts (31, 32). The adjusting screw 7 can be screwed into the first bearing part 1a. The top cover 8 can be inserted into or fixed to the concave contour 7b of the adjusting screw 7. The first bearing part 1a is composed of a rounded thin wall structure 9, wherein the adjusting screw 7, the first bearing bushing 4, the second bearing bushing 6 and the ball 5 are all rounded off. It is located in the dried thin wall structure (9).

Based on the structure described above, the ball 5 generally withstands the force present in the hinge. Through the auxiliary device, the height of the adjusting screw 7 can be adjusted within a limited range. In the event of a fire, the bearing bolts 3 firmly hold the inside of the hinges due to compression, and even if the first and second bearing bushings made of POM PTFE melt, the hinge can still work.

When using this hidden ball bearing hinge, while the outer door hinge unit is rotating, the other hinge unit is not subjected to axial and radial friction from the door. At this time, due to the special engineering plastic POM PTFE for bearing bushings, the bushing has a smooth surface, elasticity, low coefficient of friction, and the ball is made of steel to minimize wear. At the same time, the ball and sphere provide a wider contact surface, resulting in a lower coefficient of friction. Due to the high strength of the POM, the bearing performance is very ideal, and the hinge hardly wears out, making maintenance easy. In addition, only through the rotation of the hinge bearing portion will the door rotate. This hinge is balanced by a hidden bearing portion inside the hinge and is streamlined.

These hidden ball bearing hinges are tested to the highest 14 grades of EN 1935 and have passed 200,000 test cycles. In particular, these hinges can still operate under a radial attraction of 1.5T.

All obvious changes in this area should be protected from the claims. The door hinge of the present invention is suitable for use in aluminum doors, wooden doors, intrusion prevention doors.

3A and 3B show the door hinge receptacles of the present invention for two-dimensional placement of the doors.

3A and 3B show the receiving portion 41 disposed in the door frame (not shown). The receiving portion 41 has a base plate 43 and an upstanding plate 41a connected to the door frame. The pressing plate 45 and the base plate 43 form a receiving groove 44 into which the door hinge unit 2 can be inserted, and the door can be disposed in the door frame. By tightening the screw 42, the door hinge unit 2 is tightened between the pressing plate 45 and the base plate 43.

As described above, according to the present invention, by providing a simpler and easier assembly of a door hinge, in particular a light door, it can be easily rotated and hardly worn. In addition, according to the present invention, the assembly and placement of the door is solved so that the hinge is free of maintenance during its useful life.

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Claims (13)

A door hinge comprising an outer door hinge unit 1 and an inner door hinge unit 2 having fixing parts for fixing to a door frame or a door, The outer door hinge unit 1 includes two first cylindrical bearing portions 1a fixed thereto, and the inner door hinge unit 2 includes second fixed cylindrical bearing portions 2a fixed thereto. The second cylindrical bearing portion 2a is located between the two first cylindrical bearing portions 1a, and the first cylindrical bearing portion 1a is coaxial with the second cylindrical bearing portion 2a. , A first bearing bushing 4 and a second bearing bushing 6 are installed in each first cylindrical bearing portion 1a, and a ball is provided between the first bearing bushing 4 and the second bearing bushing 6. A bearing bolt 3 is disposed between the first bearing bushings 4 in which the 5 is positioned, and the main body 33 of the bearing bolt 3 is formed of the inner door hinge unit 2. 2 extends through the cylindrical bearing portion 2a, the upper and lower rods 31 and 32 of the bearing bolt 3 engage the grooves 4b of the first bearing bushings 4, The bearing bolt 3 is connected to the second cylindrical bearing portion 2a, Door hinge. The method of claim 1, The bearing bolt 3 is an elongate cylindrical shaft having three outer contours, Characterized in that the diameter of the upper shaft 31 and the lower shaft 32 is smaller than the diameter of the body 33 for the intermediate connection, Door hinge. 3. The method of claim 2, The upper and lower contour areas on the intermediate part connecting body 33 of the bearing bolt 3 are partly connected to the inner contour 1b of the first cylindrical bearing part 1a, The intermediate regions on the intermediate portion connecting body 33 of the bearing bolt 3 are pressed against the inner hole of the second cylindrical bearing portion 2a by pressure fitting, The upper shaft 31 and the lower shaft 32 of the bearing bolt 3 are characterized in that they are inserted into the cylindrical inner groove 4b of the first bearing bushing 4, Door hinge. The method of claim 1, The bearing bolt 3 is connected to the second cylindrical bearing portion 2a by an additional bolt 40 extending radially through the bearing bolt 3 and the second cylindrical bearing portion 2a. Characterized by Door hinge. The method of claim 1, The bearing bolt 3 and the first bearing bushing 4 is an integrated assembly, Door hinge. The method of claim 1, Characterized in that at least one of the upper shaft 31 and the lower shaft 32 of the bearing bolt 3 is glued to each other with the first bearing bushing 4, Door hinge. The method of claim 1, Both the first bearing bushing 4 and the second bearing bushing 6 have a cylindrical outer contour, The cylindrical outer contour of the first bearing bushing 4 and the second bearing bushing 6 fits precisely to the inner contour 1b of the first cylindrical bearing portion 1a, Door hinge. The method of claim 1, The ball 5 is made of steel, characterized in that the first bearing bushing 4 and the bearing bushing 6 is made of special engineering plastic POM PTFE, Door hinge. The method of claim 1, The adjusting screw 7 with an outer thread engages with the inner thread of the first cylindrical bearing portion 1a and presses the second bearing bushing 6 against the ball 5. , Door hinge. The method of claim 1, Said first bearing bushing 4 and said second bearing bushing 6 have hemispherical inner contours 4a, 6a, Door hinge. The method of claim 10, wherein the second bearing bushing (6) Characterized in that it has a blind hole 6b on the opposite side of said hemispherical inner contour 4a, 6a which engages a face side 7a of the adjusting screw 7 therein, Door hinge. 12. The method of claim 11, Characterized in that the top cover 8 can be inserted into or adhered to the groove 7b of the adjusting screw 7, Door hinge. The method according to any one of claims 1 to 12, The first cylindrical bearing portion 1a and the second cylindrical bearing portion 2a are composed of a rounded thin wall structure 9, The adjusting screw 7, the first bearing bushing 4, the second bearing bushing 6 and the ball 5 are all located in the rounded thin wall structure 9, Door hinge.

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