Hydraulic hinge

Abstract

The utility model relates to the technical field of hinges, in particular to a hydraulic hinge which comprises a hydraulic hinge mandrel, a first hinge piece and a second hinge piece, when the hydraulic hinge is used, the first hinge piece is installed on a door, the second hinge piece is installed on a door frame, and when the first hinge piece rotates along with the opening of the door, the first hinge piece drives a piston rod to rotate and move in the axial direction of a shell. After the door is opened, the fan blades return to the thrust spring to force the piston rod to move and reset, the door is forced to be automatically closed, the hydraulic oil in the second oil cavity flows into the first oil cavity, the door is slowly closed through flowing of the hydraulic oil, and therefore the buffering effect on the door is achieved. Therefore, violent collision between the door and the door frame is avoided, the service life of the door is prolonged, and noise generated when the door is closed is reduced.

Description

Technical Field

[0001] This utility model relates to the field of hinge technology, and in particular to a hydraulic hinge. Background Technology

[0002] Currently, ordinary hinges are widely used as hinge components for building doors and windows. Existing doors and windows mainly achieve opening and closing in two ways. The first is the use of traditional folding hinges. However, these hinges only provide a hinge function. When users close the door, they usually need to push one side of the door towards the door frame with force. This can easily lead to excessive force, causing excessive noise from the door hitting the door frame or generating a large impact, which will reduce the lifespan of the door. The second method uses a combination of ordinary hinges, door catches, and door closers. This method accounts for a considerable proportion in the building hardware industry. First, a door catch is installed at a specific location on the ground or wall. When the door is opened to that angle (usually 90°), the door catch is used to hold the door in place. Then, a door closer is installed at the top of the door frame so that the door can close automatically within that specific angle range. This combination method has drawbacks such as complex installation, large space occupation, and large material usage. Utility Model Content

[0003] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.

[0004] A hydraulic hinge includes a hydraulic hinge mandrel, a first leaf blade, and a second leaf blade. The hydraulic hinge mandrel includes a housing, which is a cylindrical structure open at both ends. A first cover and a second cover are provided at each end of the housing. A piston rod is slidably disposed within the housing. A fan-blade return thrust spring is disposed between the first cover and the piston rod. A positioning pin perpendicular to the piston rod is provided. A spiral groove is formed on the housing, and the positioning pin passes through the spiral groove. A piston block is provided at one end of the piston rod. A first oil seal is fitted over the piston block, and a first oil seal is formed between the first oil seal and the second cover. The piston rod is fitted with a second oil seal above the piston block. A second oil chamber is formed between the first and second oil seals. Hydraulic oil is contained in both the first and second oil chambers. A throttling needle is provided on the second seal cover. A first oil passage for the throttling needle to extend into is opened at the bottom of the piston rod. A second oil passage communicating with the first oil passage is opened on the outer side of the piston block. A first sleeve is provided on the first blade and is fitted onto the outer shell. A guide groove is opened along the axial direction of the inner wall of the first sleeve, and a positioning pin extends into the guide groove. A second sleeve is provided on the second blade and is fitted onto the outer shell.

[0005] As a further embodiment of this utility model: the piston rod is provided with a mounting hole, the central axis of the mounting hole is perpendicular to the central axis of the piston rod, there are two spiral grooves and two guide grooves, the positioning pin is fixed in the mounting hole, and its two ends pass through the two spiral grooves and extend into the two guide grooves respectively.

[0006] As a further embodiment of this utility model: two limiting bosses are provided at intervals inside the outer shell, and a hydraulic oil thrust spring is provided between one of the limiting bosses and the second oil seal.

[0007] As a further embodiment of this utility model: the bottom of the piston rod is provided with a groove, the first oil passage is connected to the groove, a copper sleeve is provided in the groove, the throttling needle passes through the copper sleeve and extends into the first oil passage, and the gap between the throttling needle and the inner wall of the copper sleeve is 0.005mm to 0.01mm.

[0008] As a further aspect of this utility model, the gap between the throttling needle and the inner wall of the first oil passage is 0.005mm to 0.01mm.

[0009] As a further embodiment of this utility model: the second page is C-shaped, and there are two second sleeves. The two second sleeves are respectively set at both ends of the second page, and the two second sleeves are sleeved on the outer shell. The first sleeve is sleeved on the outer shell and located between the two second sleeves. A gasket is provided between the first sleeve and the two second sleeves.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: Through the arrangement of a hydraulic hinge mandrel, a first leaf, and a second leaf, the first leaf is installed on the door and the second leaf on the door frame during use. When the first leaf rotates as the door opens, it drives the piston rod to rotate and move axially along the outer casing, causing the hydraulic oil in the first oil chamber to flow into the second oil chamber. After the door opens, the fan blade returns, and the thrust spring forces the piston rod to move and reset, forcing the door to close automatically. This causes the hydraulic oil in the second oil chamber to flow into the first oil chamber. The flow of hydraulic oil causes the door to close slowly, thus achieving a buffering effect on the door, preventing a violent impact between the door and the door frame, extending the door's service life, and reducing noise when closing.

[0011] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of the first page of this utility model.

[0014] Figure 2 This is a schematic diagram of the structure of the second page of this utility model.

[0015] Figure 3 This is a schematic diagram of the guide groove part of this utility model.

[0016] Figure 4 This is a schematic diagram of the spiral groove part of this utility model.

[0017] Figure 5 This is a schematic diagram of the throttling needle part of this utility model.

[0018] Figure 6 This is a schematic diagram of the first oil cavity part of this utility model.

[0019] In the diagram: 1. First blade, 2. Second blade, 3. Outer shell, 4. First cover, 5. Second cover, 6. Piston rod, 7. Fan blade return thrust spring, 8. Positioning pin, 9. Spiral groove, 10. Piston block, 11. First oil chamber, 12. Second oil seal, 13. Second oil chamber, 14. Throttling needle, 15. First oil passage, 16. Second oil passage, 17. First sleeve, 18. Guide groove, 19. Second sleeve, 20. Mounting hole, 21. Limiting boss, 22. Hydraulic oil thrust spring, 23. Groove, 24. Copper sleeve, 25. Gasket, 26. First oil seal. Detailed Implementation

[0020] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] Please see Figures 1-6In this embodiment of the utility model, a hydraulic hinge includes a hydraulic hinge mandrel, a first leaf 1, and a second leaf 2. The hydraulic hinge mandrel includes a housing 3, which is a cylindrical structure with openings at both ends. A first cap 4 and a second cap 5 are provided at each end of the housing 3. A piston rod 6 is slidably disposed inside the housing 3. A fan blade return thrust spring 7 is provided between the first cap 4 and the piston rod 6. A positioning pin 8 perpendicular to the piston rod 6 is provided. A spiral groove 9 is formed on the housing 3, and the positioning pin 8 passes through the spiral groove 9. A piston block 10 is provided at one end of the piston rod 6. A first oil seal 26 is sleeved on the piston block 10. A first oil cavity 11 is formed between the first oil seal 26 and the second cap 5. A second oil seal 12 is fitted on the outside of the piston rod 6 above the piston block 10. A second oil chamber 13 is formed between the first oil seal 26 and the second oil seal 12. Hydraulic oil is provided in both the first oil chamber 11 and the second oil chamber 13. A throttling needle 14 is provided on the second cover 5. A first oil passage 15 is opened at the bottom of the piston rod 6 for the throttling needle 14 to extend into. A second oil passage 16 communicating with the first oil passage 15 is opened on the outside of the piston block 10. A first sleeve 17 is provided on the first blade 1. The first sleeve 17 is fitted on the outer shell 3. A guide groove 18 is opened on the inner wall of the first sleeve 17 along its axial direction. A positioning pin 8 extends into the guide groove 18. A second sleeve 19 is provided on the second blade 2. The second sleeve 19 is fitted on the outer shell 3.

[0022] Thus, in use, the first leaf blade 1 is installed on the door, and the second leaf blade 2 is installed on the door frame. When the first leaf blade 1 rotates as the door opens, the positioning pin 8 and the spiral groove 9 work together to drive the piston rod 6 to rotate and move axially along the outer casing 3. This causes the hydraulic oil in the first oil chamber 11 to flow into the second oil passage 16 through the gap between the throttle needle 14 and the first oil passage 15, and then into the second oil chamber 13 from the second oil passage 16. After the door is opened, the fan blade return thrust spring 7 pushes the piston rod 6 to move and reset, forcing the door to close automatically. The hydraulic oil in the second oil chamber 13 flows into the first oil passage 15 through the second oil passage 16, and then flows into the first oil chamber 11 through the gap between the throttle needle 14 and the first oil passage 15. The flow of hydraulic oil causes the door to close slowly, thereby achieving a buffering effect on the door, preventing a violent impact between the door and the door frame, preventing hand pinching, extending the service life of the door, and reducing noise when closing the door. It should also be noted that the hydraulic hinge proposed in this utility model is made of stainless steel, which is wear-resistant and not easily damaged, so it does not need to be replaced frequently.

[0023] To make the piston rod 6 move more smoothly, a mounting hole 20 is provided on the piston rod 6. The central axis of the mounting hole 20 is perpendicular to the central axis of the piston rod 6. There are two spiral grooves 9 and two guide grooves 18. The positioning pin 8 is fixed in the mounting hole 20, and its two ends pass through the two spiral grooves 9 and extend into the two guide grooves 18 respectively.

[0024] Two limiting protrusions 21 are spaced apart inside the outer casing 3. A hydraulic oil thrust spring 22 is installed between one of the limiting protrusions 21 and the second oil seal 12. After the door is opened, the fan blade return thrust spring 7 and the hydraulic oil thrust spring 22 push the piston rod 6 to move and reset, forcing the door to close automatically.

[0025] The piston rod 6 has a groove 23 at its bottom, and a first oil passage 15 communicates with the groove 23. A copper sleeve 24 is installed inside the groove 23. A throttling needle 14 passes through the copper sleeve 24 and extends into the first oil passage 15. The gap between the throttling needle 14 and the inner wall of the copper sleeve 24 is 0.005mm to 0.01mm. The hydraulic oil in the first oil passage 15 flows into the second oil chamber 13 through the gap between the throttling needle 14, the copper sleeve 24, and the first oil passage 15, thereby reducing the flow rate of the hydraulic oil.

[0026] The gap between the throttle needle 14 and the inner wall of the first oil passage 15 is 0.005mm to 0.01mm. Through reasonable size design, the flow rate of hydraulic oil is reduced, ensuring a good buffering effect.

[0027] The second leaf 2 is C-shaped, and there are two second sleeves 19, which are respectively located at both ends of the second leaf 2. The two second sleeves 19 are fitted onto the outer casing 3. The first sleeve 17 is fitted onto the outer casing 3 and located between the two second sleeves 19. A gasket 25 is provided between the first sleeve 17 and both second sleeves 19. The gasket 25 reduces wear between the first sleeve 17 and the second sleeves 19, thereby improving service life.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. A hydraulic hinge, characterized in that, include: The hydraulic hinge mandrel includes a housing, which is a cylindrical structure with openings at both ends. A first cover and a second cover are provided at each end of the housing. A piston rod is slidably mounted inside the housing. A fan-blade return thrust spring is provided between the first cover and the piston rod. A positioning pin perpendicular to the piston rod is provided on the piston rod. A spiral groove is provided on the housing, and the positioning pin passes through the spiral groove. A piston block is provided at one end of the piston rod. A first oil seal is fitted over the piston block, forming a first oil cavity between the first oil seal and the second cover. A second oil seal is fitted over the piston rod above the piston block, forming a second oil cavity between the first and second oil seals. Hydraulic oil is provided in both the first and second oil cavities. A throttling needle is provided on the second cover. A first oil passage for the throttling needle to extend into is provided at the bottom of the piston rod. A second oil passage communicating with the first oil passage is provided on the outer side of the piston block. The first page has a first sleeve, which is fitted onto the outer shell. The inner wall of the first sleeve has a guide groove along its axial direction, and a positioning pin extends into the guide groove. The second page has a second sleeve, which is fitted onto the outer casing.

2. A hydraulic hinge according to claim 1, characterized in that: The piston rod has a mounting hole, the central axis of which is perpendicular to the central axis of the piston rod. There are two spiral grooves and two guide grooves. The positioning pin is fixed in the mounting hole, and its two ends pass through the two spiral grooves and extend into the two guide grooves respectively.

3. A hydraulic hinge according to claim 1, characterized in that: Two limiting bosses are spaced apart inside the housing, and a hydraulic oil thrust spring is installed between one of the limiting bosses and the second oil seal.

4. A hydraulic hinge according to claim 1, characterized in that: The bottom of the piston rod is provided with a groove, and the first oil passage is connected to the groove. A copper sleeve is provided in the groove, and the throttle needle passes through the copper sleeve and extends into the first oil passage.

5. A hydraulic hinge according to claim 1, characterized in that: The gap between the throttle needle and the inner wall of the first oil passage is 0.005mm to 0.01mm.

6. A hydraulic hinge according to claim 1, characterized in that: The second leaf is C-shaped, and there are two second sleeves. The two second sleeves are respectively set at both ends of the second leaf and are fitted onto the outer shell. The first sleeve is fitted onto the outer shell and is located between the two second sleeves. A gasket is provided between the first sleeve and the two second sleeves.

7. A hydraulic hinge according to claim 4, characterized in that: The gap between the throttling needle and the inner wall of the copper sleeve is 0.005mm to 0.01mm.

Images