A cushioned hinge

Abstract

The application discloses a buffer hinge and belongs to the field of hydraulic buffer hinges, which is used for buffering door closing of a door leaf and solves the noise problem between a compression spring and a sleeve. The buffer hinge comprises a right hinge leaf, a left hinge leaf, an oil cylinder, a sleeve, a transmission sleeve and a shaft core which are sequentially arranged along the same axis, the right hinge leaf is sleeved and fixed to the transmission sleeve, the left hinge leaf is sleeved and fixed to the sleeve, the transmission sleeve is rotationally sleeved to the shaft core, the shaft core is rotationally sleeved to a transmission shaft, the sleeve is provided with the compression spring, one end of the compression spring is abutted to one end of the sleeve, the other end of the sleeve is connected to one end of the shaft core, the other end of the shaft core is sleeved to the oil cylinder, the other end of the compression spring is abutted to one end of the transmission shaft, the other end of the transmission shaft is power-connected to the oil cylinder, the relative rotation of the transmission sleeve and the shaft core can drive the transmission shaft to move axially, and the axial movement of the transmission shaft can drive the relative rotation of the transmission sleeve and the shaft core.

Description

Technical Field

[0001] This invention belongs to the field of hydraulic buffer hinges, and specifically relates to a hinge that uses an independent hydraulic cylinder for buffer closing. 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. Existing hydraulic soft-close hinges with independent cylinders have the door closing return spring directly mounted on the piston rod of the independent cylinder. This increases the friction between the door closing return spring and the sleeve during compression and return, generating noise and significantly affecting the user experience. Summary of the Invention

[0003] The purpose of this invention is to provide a buffer hinge that reduces the noise from the movement of the door closing reset spring and the sleeve.

[0004] A buffer hinge includes a right leaf, a left leaf, a hydraulic cylinder, a drive shaft, and a sleeve, a transmission sleeve, and a shaft core arranged sequentially along the same axis. The right leaf is sleeved and fixed to the transmission sleeve, and the left leaf is sleeved and fixed to the sleeve. The transmission sleeve is rotatably sleeved to the shaft core, and the shaft core is rotatably sleeved to the drive shaft. A compression spring is provided inside the sleeve, one end of which abuts against one end of the sleeve, and the other end of the sleeve is connected to one end of the shaft core. The other end of the shaft core is sleeved to the hydraulic cylinder, and the other end of the compression spring abuts against one end of the drive shaft. The other end of the drive shaft is poweredly connected to the hydraulic cylinder. The relative rotation of the transmission sleeve and the shaft core can drive the drive shaft to move axially, and the axial movement of the drive shaft can drive the relative rotation of the transmission sleeve and the shaft core.

[0005] The hydraulic cylinder includes a cylinder body, both ends of which are sealed. A piston is slidably mounted inside the cylinder body. The piston is mounted to the cylinder body via a first oil seal. The piston extends from one end of the cylinder body via a piston rod. An oil control needle is mounted 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 connecting 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 the pressure relief hole 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.

[0006] The transverse channel of the orifice is located on the end face of the piston, the longitudinal channel of the orifice connects the piston and the 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.

[0007] 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.

[0008] 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.

[0009] The transmission sleeve is provided with a longitudinal groove that runs radially through it. One end of the shaft core is provided with a spiral groove corresponding to the longitudinal groove. The front end of the piston rod is provided with a through pin hole. The pin hole is connected to the other end of the transmission shaft through a transmission pin. The two ends of the transmission pin are correspondingly installed in the spiral groove and pass through the longitudinal groove.

[0010] The other end of the shaft is closed by a top cover, which is abutted against the cylinder body by an adjusting screw. The screw head of the adjusting screw corresponds to the screw head of the oil control screw, and the screw head of the adjusting screw protrudes from the operating port of the top cover.

[0011] One end of the sleeve is closed by a lower cover, which is abutted against one end of the compression spring by a pressure adjusting screw, and the screw head of the pressure adjusting screw protrudes from the operating port of the lower cover.

[0012] One end of the drive shaft forms a shaft head through a shoulder, and the shoulder abuts against a compression spring through a pressure bearing sleeved on the shaft head, with the shaft head extending into the compression spring.

[0013] A portion of the right leaf is fitted onto the sleeve, and another portion of the right leaf is fitted onto the transmission sleeve. The right leaf is fixed to the transmission sleeve by a key connection. A portion of the left leaf is fitted onto the shaft core by a needle roller bearing, and another portion of the left leaf is fitted onto the sleeve. The left leaf is fixed to the sleeve by a key connection. The right and left leaf blades are axially abutted by ball bearings.

[0014] The beneficial effects of this invention are as follows: A transmission shaft is used to transmit the restoring force of the compression spring. The compression spring is abutted by a shoulder and a pressure bearing, and the shaft head extends into the compression spring, allowing the spring to be radially limited, thus avoiding friction between the spring and the sleeve and reducing noise. Simultaneously, when the door is opened, hydraulic oil flows from the reservoir to the pressurized oil chamber through a one-way valve. When the door is closed, hydraulic oil slowly flows from the pressurized oil chamber to the reservoir through the gap between the channel and the control needle. As the door approaches closure, the hydraulic oil in the pressurized oil chamber returns to the reservoir through the pressure relief hole via the shoulder on the control needle, releasing the pressure in the pressurized oil chamber. This allows the piston to complete a one-way stroke, thereby driving the transmission mechanism connected to the piston rod to fully close the two blades. Attached Figure Description

[0015] Figure 1 This is a perspective view of the buffer hinge of the present invention; Figure 2 for Figure 1 Exploded view; Figure 3 for Figure 2 The front view of the hydraulic cylinder is shown. Figure 4 for Figure 2 The image shows a longitudinal sectional view of the hydraulic cylinder. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings.

[0017] like Figure 1 , 2 As shown in Figures 3 and 4, the buffer hinge includes a right leaf 23, a left leaf 24, a hydraulic cylinder A, a sleeve 25, a transmission sleeve 26, and a shaft core 27. The sleeve 25, the transmission sleeve 26, and the shaft core 27 are arranged sequentially along the same axis. A portion of the right leaf 23 is fitted onto the sleeve 25, and another portion of the right leaf 23 is fitted onto the transmission sleeve 26. The right leaf 23 is fixed to the transmission sleeve 26 by a key connection 28. A portion of the left leaf 24 is fitted onto the shaft core 27 by a needle roller bearing 29, and another portion of the left leaf 24 is fitted onto the sleeve 25. The left leaf 24 is fixed to the sleeve 25 by a key connection 28. The right leaf 23 and the left leaf 24 are axially abutted by ball bearings 30.

[0018] The hydraulic cylinder A 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 equipped with a one-way valve that connects the oil storage chamber 8 to the pressurized oil chamber 9.

[0019] 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.

[0020] 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.

[0021] The transmission sleeve 26 is rotatably sleeved on the shaft core 27, and the shaft core 27 is rotatably sleeved on the transmission shaft 31. A compression spring 32 is installed inside the sleeve 25. One end of the compression spring 32 abuts against one end of the sleeve 25, and the other end of the sleeve 25 is threaded to one end of the shaft core 27. The other end of the shaft core 27 is sleeved on the cylinder body 1, and the other end of the compression spring 32 abuts against one end of the transmission shaft 31.

[0022] One end of the sleeve 25 is sealed by the lower cover 33, which abuts against one end of the pressure spring 32 via an adjusting screw 34. The screw head of the adjusting screw 34 protrudes from the operating port of the lower cover 33. By turning the screw head of the adjusting screw through the operating port of the lower cover, the feed amount of the adjusting screw is adjusted, and the adjusting screw is pushed to move axially to adjust the top pressure of the adjusting screw. The deeper the adjusting screw is screwed in, the greater the axial pressure on the pressure spring when the door is opened, and the greater the elastic force released by the pressure spring when the door is closed, and the greater the closing force.

[0023] One end of the drive shaft 31 forms a shaft head 36 through a shoulder 35. The shoulder 35 abuts against the compression spring 32 through a pressure bearing 43 sleeved on the shaft head 36, and the shaft head 36 extends into the compression spring 32. By abutting against the compression spring through the shoulder and the pressure bearing, and with the shaft head extending into the compression spring, the compression spring can be radially limited, avoiding friction between the compression spring and the sleeve, which would increase noise.

[0024] The transmission sleeve 26 has a radially penetrating longitudinal groove 37. One end of the shaft core 27 has a corresponding helical groove 38. The front end of the piston rod 5 has a penetrating pin hole 6. The pin hole 6 is connected to the other end of the transmission shaft 31 via a transmission pin 39. The two ends of the transmission pin 39 are correspondingly installed in the helical groove 38 and pass through the longitudinal groove 37. By driving the helical groove 38 and the longitudinal groove 37 through the transmission pin 39, the relative rotation of the transmission sleeve and the shaft core can drive the axial movement of the transmission shaft, and the axial movement of the transmission shaft can drive the relative rotation of the transmission sleeve and the shaft core.

[0025] The other end of the shaft core 27 is sealed by the upper cover 40, which abuts against the cylinder body 1 via an adjusting screw 41. The screw head of the adjusting screw 41 corresponds to the screw head of the oil control screw 15, and the screw head of the adjusting screw 41 protrudes from the operating port 42 of the upper cover 40. By turning the screw head of the adjusting screw through the operating port of the upper cover, the feed amount of the adjusting screw is adjusted, which pushes the oil cylinder and the drive shaft to move axially to adjust the feed amount of the drive shaft. The deeper the shaft head of the drive shaft enters the compression spring, the stronger the radial constraint on the compression spring, and the quieter it is.

[0026] The following describes the action of the soft hinge when the door opens or closes: When the door is opened, the right leaf 23 rotates relative to the left leaf 24 to open, the transmission sleeve 26 rotates, and drives the transmission pin 39 to move downward along the spiral groove 38. The transmission pin 39 drives the shaft core 27 to rotate and, at the same time, drives the transmission shaft 31 to move downward axially through the longitudinal groove 37. The shoulder 35 and pressure bearing 37 of the transmission shaft 31 push the compression spring 32 to compress and store energy. At the same time, the transmission shaft 31 drives the piston rod 5 and piston 7 to slide outward from the cylinder body 1. The oil control needle 18 separates 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.

[0027] When the external force that opens the right leaf 23 and left leaf 24 disappears, the compression spring 32 releases its compressed energy, pushing the transmission shaft 31 to move axially upward through the longitudinal groove 37, and driving the transmission pin 39 to move upward along the spiral groove 38, thereby driving the shaft core 27 and the transmission sleeve 26 to rotate. The transmission sleeve 26 drives the right leaf 23 to rotate, realizing automatic door closing. At the same time, the piston rod 5 and piston 7 slide into the cylinder 1, and 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 realizing the buffer closing of the door. Tighten the oil control screw 15. The oil control screw 15 is driven by the end cap nut 13. The oil control screw 15 drives the oil control needle 18 to move in the cylinder 1, thereby 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. When the door is closed, the amount of oil passing from the pressurized oil chamber 9 to the oil storage chamber 8 is smaller, and the closing speed is slower. Conversely, the deeper the oil control needle 18 is inserted, the faster the door closes. This allows for the adjustment of the closing speed.

[0028] 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 buffer hinge, characterized in that, The cylinder includes a right leaf (23), a left leaf (24), a hydraulic cylinder (A), a drive shaft, and a sleeve (25), a transmission sleeve (26), and a shaft core (27) arranged sequentially along the same axis. The right leaf (23) is sleeved and fixed to the transmission sleeve (26), and the left leaf (24) is sleeved and fixed to the sleeve (25). The transmission sleeve (26) is rotatably sleeved to the shaft core (27), and the shaft core (27) is rotatably sleeved to the drive shaft (31). A compression spring (32) is provided inside the sleeve (25), and one end of the compression spring (32) abuts against the sleeve (25). One end of the sleeve (25) is connected to one end of the shaft core (27), the other end of the shaft core (27) is sleeved on the oil cylinder (A), the other end of the compression spring (32) abuts against one end of the transmission shaft (31), the other end of the transmission shaft (31) is powered to the oil cylinder (A), the transmission shaft (31) can be driven to move axially by the relative rotation of the transmission sleeve (26) and the shaft core (27), and the relative rotation of the transmission sleeve (26) and the shaft core (27) can be driven by the axial movement of the transmission shaft (31).

2. The buffer hinge according to claim 1, characterized in that, The cylinder (A) includes a cylinder body (1), which is sealed at both ends. A piston (7) is slidably installed inside the cylinder body (1). The piston (7) is installed in the cylinder body (1) through a first oil seal (22). The piston (7) extends from one end of the cylinder body (1) through a piston rod (5). An oil control needle (18) is installed at the other end of the cylinder body (1). The piston (7) forms an oil storage chamber (8) on one side of the piston rod (5), and the other side of the piston (7) forms an oil storage chamber (8). The piston (7) and piston rod (5) are provided with a connected 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.

3. The buffer hinge according to claim 2, 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).

4. The buffer hinge according to claim 2 or 3, 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).

5. The buffer hinge according to claim 2, 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.

6. The buffer hinge according to claim 2, characterized in that, The transmission sleeve (26) is provided with a longitudinal groove (37) that runs through the radial direction. One end of the shaft core (27) is provided with a spiral groove (38) corresponding to the longitudinal groove (37). The front end of the piston rod (5) is provided with a through pin hole (6). The pin hole (6) is connected to the other end of the transmission shaft (31) through a transmission pin (39). The two ends of the transmission pin (39) are correspondingly installed in the spiral groove (38) and pass through the longitudinal groove (37).

7. The buffer hinge according to claim 4, characterized in that, The other end of the shaft (27) is closed by the upper cover (40), which abuts against the cylinder (1) by the adjusting screw (41). The screw head of the adjusting screw (41) corresponds to the screw head of the oil control screw (15), and the screw head of the adjusting screw (41) protrudes from the operating port (42) of the upper cover (40).

8. The buffer hinge according to claim 1, characterized in that, One end of the sleeve (25) is closed by the lower cover (33), and the lower cover (33) abuts against one end of the pressure spring (28) by the pressure adjusting screw (34), and the screw head of the pressure adjusting screw (34) protrudes from the operating port of the lower cover (33).

9. The buffer hinge according to claim 1, characterized in that, One end of the drive shaft (31) forms a shaft head (36) through a shoulder (35). The shoulder (35) abuts against the compression spring (32) through a pressure bearing (43) sleeved on the shaft head (36). The shaft head (36) extends into the compression spring (32).

10. The buffer hinge according to claim 1, characterized in that, A portion of the right leaf (23) is fitted onto the sleeve (25), and another portion of the right leaf (23) is fitted onto the transmission sleeve (26). The right leaf (23) is fixed to the transmission sleeve (26) via a key connection (28). A portion of the left leaf (24) is fitted onto the shaft core (27) via a needle roller bearing (29), and another portion of the left leaf (24) is fitted onto the sleeve (25). The left leaf (24) is fixed to the sleeve (25) via a key connection (28). The right leaf (23) and the left leaf (24) are axially abutted by ball bearings (30).

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