1. Field of the Invention
The present invention relates to a hydraulic hinge, especially for a hydraulic hinge for a glass door.
2. Description of Related Art
A glass door is pivotally mounted on a doorframe by a hydraulic hinge. A conventional hydraulic hinge has a fixing plate, a rotating seat, a pivot and a buffer module. The fixing plate is mounted on the doorframe. The rotating seat is mounted on the glass door and has an oil chamber for storing oil and an oil passage communicating with the oil chamber. The pivot has a first portion, a second portion and an eccentric cam. The first portion of the pivot is mounted on the fixing plate and the second portion of the pivot is mounted into the rotating seat. The eccentric cam is located in the rotating seat. The buffer module is mounted on the rotating seat and is located in the oil chamber of the rotating seat. The buffer module has a valve and a spring. The valve has a through hole for receiving the pivot and a fixing element for abutting against the eccentric cam. The valve has a recess communicating with the through hole and the oil passage, a first oil hole and a second oil hole. The first oil hole and the second oil hole communicate with the recess and the oil chamber. The spring abuts against the rotating seat and the valve.
When the glass door is pivoted, the rotating seat is rotated relative to the fixing plate. The eccentric cam of the pivot abuts the fixing element of the valve for controlling the valve to press the spring and drive oil in the oil chamber. However, the valve is structurally complex, thereby complicating the manufacturing process. Additionally, the rotating seat provides only a single oil passage, so the glass door is closed slowly such that cool air generated by an air-conditioner escapes from the house.
To overcome the shortcomings, the present invention provides a hydraulic hinge to mitigate or obviate the aforementioned problems.
The main object of the present invention is to provide a hydraulic hinge for a glass door; the hydraulic hinge has a fixing plate, a rotating seat, a pivot and a buffer module.
The rotating seat has a body, an oil chamber, a first oil passage and a second oil passage. The oil chamber, the first oil passage and the second oil passage are formed in the body. The first oil passage has a first inlet and a first outlet. The first inlet and the first outlet are in communication with the oil chamber respectively. The second oil passage has a second inlet and a second outlet. The second inlet is in communication with the first oil passage. The second outlet is in communication with the oil chamber and is disposed between the first inlet and the first outlet.
The pivot is combined with the fixing plate and the rotating seat, and has a first portion, a second portion and an abutted surface. The first portion is mounted steadily on the fixing plate. The second portion is opposite to the first portion and is mounted rotatably into the rotating seat. The abutted surface is formed on the pivot and is located in the oil chamber of the rotating seat. The abutted surface is flat.
The buffer module is mounted in the rotating seat and is located in the oil chamber of the rotating seat and has a valve and a spring. The valve abuts against the pivot. The valve has an outer surface, a first surface, a second surface, an axial hole, a ball, a baffle, a circular groove and a radial hole. The first surface abuts against the pivot. The second surface is opposite to the first surface. The axial hole is formed through the valve and has a first opening and a second opening. The first opening is formed on the first surface. The second opening is formed on the second surface. The ball is mounted in the axial hole of the valve. The baffle is mounted on the first opening of the axial hole and has a via hole communicating with the oil chamber and the axial hole. The circular groove is formed around the outer surface of the valve. The radial hole is formed radially in the valve and is in communication with the axial hole and the circular groove. The spring is mounted in the oil chamber of the rotating seat and has a first end and a second end. The first end abuts against the body of the rotating seat. The second end is opposite to the first end and abuts against the second surface of the valve.
The fixing plate of the hydraulic hinge is mounted on a doorframe. The rotating seat is mounted on a glass door. When the glass door is closed to a specific angle, the circular groove of the valve communicates with the second oil passage, and then oil in the oil chamber can flow through the circular groove of the valve, the radial hole of the valve, and further flow out the second surface of the valve. Therefore, the refluxing of oil in the hydraulic hinge is increased to increase the velocity of repositioning the rotating seat and the velocity of closing the glass door. Thus, the velocity of closing the glass door increases gradually from low speed to high speed, such that cool air escaping from the house is reduced. In addition, the valve of the hydraulic hinge is structurally simple, thereby simplifying the manufacturing process.
Other objects, advantages and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.
With reference to
The fixing plate 10 has a top surface, a side surface, a connecting hole 11, a side opening 12, multiple through holes 15 and a lid 13. The side surface is connected to the top surface. The connecting hole 11 is formed in the top surface and extends through the fixing plate 10. With reference to
With reference to
With reference to
The buffer module 40 is mounted in the rotating seat 20 and is located in the oil chamber 22 of the rotating seat 20. The buffer module 40 has a valve 41 and a spring 42. The valve 41 is cylindrical and abuts against the pivot 30. The valve 41 has an outer surface, a first surface 43, a second surface 44, an axial hole 45, a ball 46, a baffle 47, a circular groove 48 and a radial hole 49. The first surface 43 abuts against the pivot 30. The second surface 44 is opposite to the first surface 43.
With further reference to
With further reference to
The spring 42 is mounted in the oil chamber 22 and has a first end and a second end. The first end of the spring 42 abuts against the body 21 of the rotating seat 20. The second end of the spring 42 abuts against the second surface 44 of the valve 41.
With reference to
With reference to
With reference to
When the glass door 60 is closed to a specific angle, a passage between the grass door 60 and the doorframe 50 cannot provide enough space for users to pass through. With reference to
If the combination positions of the hydraulic hinge and the glass door 60 are offset from each, the lid 13 of the fixing plate 10 can be disassembled for adjusting the pivot 30. When the adjustment of the pivot 30 is finished, the lid 13 of the fixing plate 10 can be reassembled and the toothed part 32 of the pivot 30 abuts against the cambered surface 14 of the lid 13 for increasing the combination stability between the pivot 30 and the fixing plate 10. Furthermore, the amount of oil flowing out of the first outlet 232 is controlled by the first adjustment element 25, and the amount of oil flowing out the second outlet 241 is controlled by the second adjustment element 26.
Accordingly, the circular groove 48 of the valve 41 communicates with the second oil passage 24 when the glass door 60 is closed to a specific angle, and then oil can flow through the circular groove 48 of the valve 41, the radial hole 49 of the valve 41, and further flow into the second space. Therefore, the refluxing of oil in the hydraulic hinge is increased, and the velocity of repositioning the rotating seat and the velocity of closing the glass door 60 are increased. Thus, the velocity of closing the glass door 60 gradually increases from low speed to high speed for reducing the cool air escaping from the house. In addition, the valve 41 of the hydraulic hinge is structurally simple, thereby simplifying the manufacturing process.
Even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and function of the invention, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the teiins in which the appended claims are expressed.
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