Hinge oil cylinder

Abstract

The utility model discloses a hinge oil cylinder, which belongs to the field of hydraulic buffering hinges, is used for buffering closing of a door leaf, solves the problem that the door leaf cannot be locked smoothly when the door leaf is buffered to be closed to be close, and comprises a cylinder body, two ends of the cylinder body are sealed, a piston is mounted in the cylinder body in a sliding manner, the piston is mounted in the cylinder body through a first oil seal, and a second oil seal is mounted in the cylinder body. The piston extends out of one end of the cylinder body through a piston rod, an oil control needle is installed at the other end of the cylinder body, an oil storage cavity is formed in the position, on one side of the piston rod, of the piston, a pressed oil cavity is formed in the other side of the piston, the piston and the piston rod are provided with hole channels which are communicated, and the piston is provided with a one-way valve which is communicated with the pressed oil cavity through the oil storage cavity. A pressure relief hole is formed in the outer edge of the piston and communicated with the hole channel, the oil control needle is installed in the hole channel in a sliding mode, a shaft shoulder is arranged in the middle of the oil control needle, and a needle rod taper is arranged at the front end of the oil control needle.

Description

Technical Field

[0001] This utility model belongs to the field of hydraulic buffer hinges, and specifically relates to a buffer independent oil cylinder. Background Technology

[0002] Hydraulic soft-close hinges typically consist of two hinge blades, a transmission mechanism, and a hydraulic soft-close mechanism. The two blades are respectively installed on the door leaf and the door frame. When the door leaf is opened by external force, one blade rotates relative to the other. This rotational torque is transmitted to the hydraulic soft-close mechanism via the transmission mechanism, thus achieving a soft-close closing of the door leaf. The hydraulic soft-close mechanism uses an independent cylinder to avoid the drawback of oil circuit blockage caused by sharing a cavity with the transmission mechanism. Furthermore, the independent cylinder reduces the amount of hydraulic oil used, effectively maintaining the cleanliness of the hydraulic oil. However, existing independent cylinders cannot guarantee smooth locking when the door leaf is nearly closed. Utility Model Content

[0003] The purpose of this invention is to provide a hinge cylinder that enables smooth locking when the door is closed to near-closed.

[0004] A hinge cylinder includes a cylinder body, both ends of which are sealed. A piston is slidably mounted inside the cylinder body and is installed in the cylinder body via a first oil seal. The piston extends from one end of the cylinder body via a piston rod, and an oil control needle is installed at the other end of the cylinder body. An oil storage chamber is formed on one side of the piston rod, and a pressurized oil chamber is formed on the other side of the piston. The piston and piston rod are provided with a communicating channel. The piston is provided with a one-way valve that connects the oil storage chamber to the pressurized oil chamber. A pressure relief hole is provided on the outer edge of the piston and is connected to the channel. The oil control needle is slidably mounted in the channel. The oil control needle has a shoulder in the middle and a needle rod taper at the front end.

[0005] The channel is T-shaped, with the transverse channel located on the end face of the piston and the longitudinal channel connecting the piston and piston rod. The pressure relief hole is connected to the longitudinal channel, and the front end of the oil control needle slides from the transverse channel into the longitudinal channel.

[0006] The tail end of the oil control needle is fixed to the oil control screw. The outer edge of the oil control screw is threadedly connected to the end cap nut. The outer edge of the end cap nut is threadedly connected to the internal thread of the cylinder body. The end cap nut is installed at the other end of the cylinder body through a second oil seal. The oil control screw is installed on the end cap nut through a third oil seal.

[0007] One end of the cylinder is provided with an outer rubber ring, a Y-shaped rubber ring, and a T-shaped rubber ring in sequence from the outside to the inside, and the piston rod passes through the T-shaped rubber ring, the Y-shaped rubber ring, and the outer rubber ring in sequence from the inside to the outside.

[0008] The piston rod has a through pin hole at its front end.

[0009] The beneficial effects of this utility model are as follows: when the door is opened, hydraulic oil flows from the oil storage chamber to the pressurized oil chamber through the one-way valve; when the door is closed, hydraulic oil flows slowly from the pressurized oil chamber to the oil storage chamber through the gap between the channel and the control needle; when the door is close to being closed, the hydraulic oil in the pressurized oil chamber returns to the oil storage chamber through the shoulder on the control needle from the pressure relief hole, thereby relieving the pressure of the hydraulic oil in the pressurized oil chamber, so that the piston completes a one-way stroke, and then the transmission mechanism connected to the piston rod drives the two blades to close completely. Attached Figure Description

[0010] Figure 1 This is a front view of the hinge cylinder of this utility model;

[0011] Figure 2 This is a longitudinal sectional view of the hinge cylinder of this utility model. Detailed Implementation

[0012] The present invention will now be described in further detail with reference to the accompanying drawings.

[0013] like Figure 1 , 2 As shown, the hinge cylinder includes a cylinder body 1. One end of the cylinder body 1 is sealed from the outside in by an outer rubber ring 2, a Y-shaped rubber ring 3, and a T-shaped rubber ring 4. The piston rod 5 passes through the T-shaped rubber ring 4, the Y-shaped rubber ring 3, and the outer rubber ring 2 from the inside out, and extends out from the outer rubber ring 2. The front end of the piston rod 5 has a through pin hole 6. The tail end of the piston rod 5 is integrally formed with one end of the piston 7. The piston 7 is installed in the cylinder body 1 through a first oil seal 22. The piston 7 is slidably installed in the cylinder body 1. The piston 7 forms an oil storage chamber 8 on one side of the piston rod 5 and a pressurized oil chamber 9 on the other side. The piston 7 is provided with a one-way valve that connects the oil storage chamber 8 to the pressurized oil chamber 9.

[0014] The piston 7 and piston rod 5 are provided with interconnected channels. The channels are T-shaped channels consisting of a transverse channel 10 and a longitudinal channel 11. The transverse channel 10 is located at the other end of the piston 7, and the longitudinal channel 11 connects the piston 7 and piston rod 5. The outer edge of the piston 7 is provided with a pressure relief hole 12, which is connected to the longitudinal channel 11.

[0015] An end cap nut 13 is provided at the other end of the cylinder body 1. The outer edge of the end cap nut 13 is connected to the internal thread of the cylinder body 1. The end cap nut 13 is installed inside the cylinder body 1 through a second oil seal 14. The internal thread of the end cap nut 13 is connected to the external thread of the oil control screw 15. The oil control screw 15 is installed on the end cap nut 13 through a third oil seal 16. An oil control needle 18 is installed at the front end of the oil control screw 15 through a limiting groove 17. A T-bar 19 is provided at the tail end of the oil control needle 18. The T-bar 19 is engaged with the limiting groove 17. The front end of the oil control needle 18 is slidably installed in the longitudinal channel 11 from the transverse channel 10. A shoulder 20 is provided near the tail end of the oil control needle 18. A needle taper 21 is provided at the front end of the oil control needle 18.

[0016] When the two blades are opened by the relative rotation of the two blades under external force, the transmission mechanism is driven to make the piston rod 5 and piston 7 slide to the outside of the cylinder 1, i.e., the door is open. The oil control needle 18 moves away from the piston 7 and piston rod 5. At this time, the hydraulic oil flows from the oil storage chamber 8 to the pressurized oil chamber 9 through the one-way valve.

[0017] When the external force that opens the two leaf blades disappears, the reset mechanism drives the transmission mechanism to slide the piston rod 5 and piston 7 into the cylinder 1, thus closing the door. The oil control needle 18 moves towards the piston 7 and piston rod 5. At this time, hydraulic oil flows slowly from the pressurized oil chamber 9 to the oil storage chamber 8 through the gap between the longitudinal channel 11 and the oil control needle 18, thereby achieving a buffered closing of the door. Tightening the oil control screw 15 causes it to spiral along the end cap nut 13. The oil control screw 15 drives the oil control needle 18 to move within the cylinder 1, adjusting the insertion depth of the oil control needle 18 with the needle rod taper 21. This changes the gap between the needle rod taper 21 and the longitudinal channel 11 to control the amount of oil passing through. The deeper the oil control needle 18 is inserted, the smaller the gap between the oil control needle 18 and the longitudinal channel 11, resulting in less oil passing from the pressurized oil chamber 9 to the oil storage chamber 8 when closing the door, thus slowing down the closing speed. Conversely, the deeper the insertion, the faster the closing speed, thereby adjusting the closing speed.

[0018] When the door is closed to 5 to 10 degrees before closing (this closing angle can be adjusted by the oil control needle 18; by turning the oil control screw 15, the oil control screw 15 is driven by the end cap nut 13, and the oil control screw 15 drives the oil control needle 18 to move in the cylinder 1, thereby adjusting the distance between the shoulder 20 on the oil control needle 18 and the pressure relief hole 12 on the piston 7; the smaller the distance, the larger the closing angle, and vice versa), the piston 7 and piston rod 5 approach the tail end of the oil control needle 18. At this time, the pressure relief hole 12 is aligned with the shoulder 20, and the pressure relief hole 12 and the shoulder 20 form a pressure relief gap. The hydraulic oil in the pressurized oil chamber 9 returns to the oil storage chamber 8 through the shoulder 20 from the pressure relief hole 12, thereby relieving the pressure of the hydraulic oil in the pressurized oil chamber 9. This causes the transmission mechanism connected to the piston rod 7 to drive the two blades to close completely, thereby driving the door to close quickly and lock smoothly 5 to 10 degrees before closing.

Claims

1. A hinge cylinder, characterized in that, The system includes a cylinder body (1) sealed at both ends. A piston (7) is slidably mounted inside the cylinder body (1). The piston (7) is mounted on the cylinder body (1) via a first oil seal (22). The piston (7) extends from one end of the cylinder body (1) via a piston rod (5). An oil control needle (18) is mounted on the other end of the cylinder body (1). An oil storage chamber (8) is formed on one side of the piston rod (5) and a pressure chamber is formed on the other side of the piston (7). The piston (7) and piston rod (5) are provided with a connecting channel. The piston (7) is provided with a one-way valve that connects to the pressurized oil chamber (9) through the oil storage chamber (8). The outer edge of the piston (7) is provided with a pressure relief hole (12). The pressure relief hole (12) is connected to the channel. The oil control needle (18) is slidably installed in the channel. The oil control needle (18) is provided with a shoulder (20) in the middle and a needle rod taper (21) at the front end.

2. The hinge cylinder according to claim 1, characterized in that, The channel is T-shaped, the transverse channel (10) of the channel is located on the end face of the piston (7), the longitudinal channel (11) of the channel connects the piston (7) and the piston rod (5), the pressure relief hole (12) is connected to the longitudinal channel (11), and the front end of the oil control needle (18) slides from the transverse channel (10) into the longitudinal channel (11).

3. The hinge cylinder according to claim 1 or 2, characterized in that, The tail end of the oil control needle (18) is fixed to the oil control screw (15). The outer edge of the oil control screw (15) is threaded with an end cap nut (13). The outer edge of the end cap nut (13) is threaded with the internal thread of the cylinder body (1). The end cap nut (13) is installed on the other end of the cylinder body (1) through a second oil seal (14). The oil control screw (15) is installed on the end cap nut (13) through a third oil seal (16).

4. The hinge cylinder according to claim 1, characterized in that, One end of the cylinder (1) is provided with an outer rubber ring (2), a Y-shaped rubber ring (3), and a T-shaped rubber ring (4) from the outside to the inside. The piston rod (5) passes through the T-shaped rubber ring (4), the Y-shaped rubber ring (3), and the outer rubber ring (2) from the inside to the outside.

5. The hinge cylinder according to claim 1, characterized in that, The piston rod (5) has a through pin hole (6) at its front end.

Images