Buffer hinge

Abstract

The utility model discloses a buffering hinge, which belongs to the field of hydraulic buffering hinges, is used for buffering door closing of a door leaf, solves the problem of noise between a pressure spring and a sleeve, and comprises a right hinge piece, a left hinge piece, an oil cylinder, and the sleeve, a transmission sleeve and a shaft core which are sequentially arranged along the same axis, the left hinge piece is fixedly connected to the sleeve in a sleeved mode, the transmission sleeve is rotationally connected to the shaft core in a sleeved mode, the shaft core is rotationally connected to the transmission shaft in a sleeved mode, a compressed spring is arranged in the sleeve, one end of the compressed spring abuts against one end of the sleeve, the other end of the sleeve is connected to one end of the shaft core, and the other end of the shaft core is connected to the oil cylinder in a sleeved mode. The other end of the compression spring abuts against one end of the transmission shaft, the other end of the transmission shaft is in power connection with the oil cylinder, the transmission shaft can be driven to do axial movement through relative rotation of the transmission sleeve and the shaft core, and relative rotation of the transmission sleeve and the shaft core can be driven through axial movement of the transmission shaft.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of hydraulic buffer hinge, especially relates to a hinge that adopts independent oil cylinder to buffer door closing. BACKGROUND

[0002] Hydraulic buffer hinge generally includes two pieces of leaf, transmission mechanism and hydraulic buffer mechanism, two pieces of leaf are installed respectively in door leaf and door frame, make one piece of leaf rotate relative to another piece of leaf by the help of external force flat open door leaf, the rotation torque is transmitted to the hydraulic buffer mechanism through transmission mechanism, thereby realizes the buffer closing of door leaf. The existing hydraulic buffer hinge configured with independent oil cylinder, the door closing reset compression spring is directly sleeved on the piston rod of independent oil cylinder, makes the friction of door closing reset compression spring and sleeve pipe increase and produce noise in the compression and reset process, greatly influences the use effect. SUMMARY

[0003] The utility model discloses a buffer hinge, reduces the movement noise of door closing reset compression spring and sleeve pipe.

[0004] A buffer hinge includes right leaf, left leaf, oil cylinder, transmission shaft and sleeve pipe, transmission sleeve and shaft core arranged in sequence along the same axis, the right leaf is sleeved and fixed to the transmission sleeve, the left leaf is sleeved and fixed to the sleeve pipe, the transmission sleeve is rotatably sleeved on the shaft core, the shaft core is rotatably sleeved on the transmission shaft, the sleeve pipe is provided with compression spring, one end of the compression spring is abutted to one end of the sleeve pipe, the other end of the sleeve pipe is connected to one end of the shaft core, the other end of the shaft core is sleeved on 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.

[0005] The oil cylinder includes cylinder body, both ends of the cylinder body are sealed, a piston is slidably installed in the cylinder body, the piston is installed on the cylinder body through first oil seal, the piston extends out from one end of the cylinder body through piston rod, a control oil needle is installed on the other end of the cylinder body, the piston forms oil storage cavity on the side of the piston rod, the other side of the piston forms pressure receiving cavity, the piston and the piston rod are provided with communicating hole, the piston is provided with one-way valve for guiding from the oil storage cavity to the pressure receiving cavity, the outer edge of the piston is provided with pressure relief hole, the pressure relief hole is communicated with the hole, the control oil needle is slidably installed in the hole, the middle part of the control oil needle is provided with shaft shoulder, and the front end of the control oil needle is provided with needle rod taper.

[0006] The transverse channel of the hole is arranged on the end face of the piston, the longitudinal channel of the hole is communicated with the piston and the piston rod, the pressure relief hole is communicated with the longitudinal channel, and the front end of the control oil needle slides into the longitudinal channel from the transverse channel.

[0007] The tail end of the oil control needle is fixed to an oil control screw, the outer edge of the oil control screw is threadedly connected with an end cover nut, the outer edge of the end cover nut is threadedly connected with the cylinder body, the end cover nut is installed at the other end of the cylinder body through a second oil seal, and the oil control screw is installed on the end cover nut through a third oil seal.

[0008] An outer rubber ring, a Y-shaped rubber ring and a T-shaped rubber ring are sequentially arranged from outside to inside at one end of the cylinder body, and the piston rod sequentially passes through the T-shaped rubber ring, the Y-shaped rubber ring and the outer rubber ring from inside to outside.

[0009] The transmission sleeve is provided with a longitudinal groove penetrating in the radial direction, one end of the shaft core is provided with a helical groove corresponding to the longitudinal groove, the front end of the piston rod is provided with a penetrating pin hole, the pin hole is connected with the other end of the transmission shaft through a transmission pin, and the two ends of the transmission pin are correspondingly installed in the helical groove and pass out of the longitudinal groove.

[0010] The other end of the shaft core is closed through an upper cover, the upper cover is abutted against the cylinder body through a distance adjusting screw, the screw head of the distance adjusting screw corresponds to the screw head of the oil control screw, and the screw head of the distance adjusting screw is exposed from the operation port of the upper cover.

[0011] One end of the sleeve is closed through a lower cover, the lower cover is abutted against one end of the compression spring through a pressure adjusting screw, and the screw head of the pressure adjusting screw is exposed from the operation port of the lower cover.

[0012] One end of the transmission shaft is formed into a shaft head through a shaft shoulder, the shaft shoulder is abutted against the compression spring through a pressure bearing sleeved on the shaft head, and the shaft head extends into the compression spring.

[0013] Part of the right page sheet is sleeved on the sleeve, another part of the right page sheet is sleeved on the transmission sleeve, the right page sheet is fixed to the transmission sleeve through key connection, part of the left page sheet is sleeved on the shaft core through a needle bearing, another part of the left page sheet is sleeved on the sleeve, and the left page sheet is fixed to the sleeve through key connection.

[0014] The beneficial effects of the utility model are: the transmission shaft is used for transmitting the reset elastic force of the compression spring, the shaft shoulder and the pressure bearing are abutted against the compression spring, and the shaft head extends into the compression spring, so that the compression spring can be limited in the radial direction, and the friction between the compression spring and the sleeve is avoided to increase noise. Meanwhile, when the door is opened, the hydraulic oil flows from the oil storage cavity to the pressure receiving cavity through the one-way valve, when the door is closed, the hydraulic oil slowly flows from the pressure receiving cavity to the oil storage cavity through the gap between the hole and the oil control needle, when the door is closed to close, the hydraulic oil in the pressure receiving cavity returns to the oil storage cavity through the shaft shoulder on the oil control needle from the pressure relief hole, the hydraulic oil in the pressure receiving cavity is pressure released, so that the piston completes a one-way stroke, and then the transmission mechanism connected with the piston rod drives the two page sheets to completely close. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a perspective view of the buffer hinge of the utility model;

[0016] Figure 2 is Figure 1 an explosion view;

[0017] Figure 3 is Figure 2 a front view of the oil cylinder shown in the figure;

[0018] Figure 4 is Figure 2 a longitudinal sectional view of the oil cylinder shown in the figure. DETAILED DESCRIPTION

[0019] The utility model will be further explained in detail in combination with the drawings.

[0020] As Figure 1 , 2 , 3, 4 shown, the buffer hinge includes right page piece 23, left page piece 24, oil cylinder A, sleeve pipe 25, transmission sleeve 26 and axle core 27, sleeve pipe 25, transmission sleeve 26 and axle core 27 are sequentially arranged along the same axis, and the part of right page piece 23 is sleeved in sleeve pipe 25, and the other part of right page piece 23 is sleeved in transmission sleeve 26, and right page piece 23 is fixed in transmission sleeve 26 through key connection 28, and the part of left page piece 24 is sleeved in axle core 27 through needle roller bearing 29, and the other part of left page piece 24 is sleeved in sleeve pipe 25, and left page piece 24 is fixed in sleeve pipe 25 through key connection 28, and right page piece 23, left page piece 24 are axially butted through ball bearing 30.

[0021] Oil cylinder A includes cylinder body 1, and the one end of cylinder body 1 is sequentially provided with outer rubber ring 2, Y-shaped rubber ring 3 and T-shaped rubber ring 4 from outside to inside to seal the end, and piston rod 5 sequentially passes through T-shaped rubber ring 4, Y-shaped rubber ring 3 and outer rubber ring 2 from inside to outside, and piston rod 5 extends out of outer rubber ring 2. The front end of piston rod 5 is provided with through pin hole 6, and the tail end of piston rod 5 is integrally formed with one end of piston 7, and piston 7 is installed in cylinder body 1 through first oil seal 22, and piston 7 is slidingly installed in cylinder body 1, and piston 7 forms oil storage cavity 8 on the side of piston rod 5, forms pressure oil cavity 9 on the other side of piston 7, and piston 7 is provided with one-way valve for conducting through oil storage cavity 8 to pressure oil cavity 9.

[0022] Piston 7 and piston rod 5 are provided with communicating channels. The channels are composed of transverse channel 10 and longitudinal channel 11 to form T-shaped channel, wherein transverse channel 10 is arranged at the other end of piston 7, longitudinal channel 11 communicates piston 7 and piston rod 5, and the outer edge of piston 7 is provided with pressure relief hole 12, and pressure relief hole 12 communicates with longitudinal channel 11.

[0023] The other end of the cylinder 1 is provided with an end cover nut 13, the outer edge of the end cover nut 13 is connected with the internal thread of the cylinder 1, the end cover nut 13 is installed in the cylinder 1 through a second oil seal 14. The internal thread of the end cover nut 13 is connected with the external thread of an oil control screw 15, the oil control screw 15 is installed in the end cover nut 13 through a third oil seal 16. The front end of the oil control screw 15 is installed with an oil control needle 18 through a limiting slot 17, the tail end of the oil control needle 18 is provided with a T-shaped rod 19, the T-shaped rod 19 is clamped in the limiting slot 17, the front end of the oil control needle 18 is slidably installed in the longitudinal channel 11 from the transverse channel 10, the position close to the tail end of the oil control needle 18 is provided with a shaft shoulder 20, the front end of the oil control needle 18 is provided with a needle rod taper 21.

[0024] The transmission sleeve 26 is rotatably sleeved on the shaft core 27, the shaft core 27 is rotatably sleeved on a transmission shaft 31, a compression spring 32 is arranged in the sleeve pipe 25, one end of the compression spring 32 abuts against one end of the sleeve pipe 25, the other end of the sleeve pipe 25 is threadedly connected to one end of the shaft core 27, the other end of the shaft core 27 is sleeved on the cylinder 1, and the other end of the compression spring 32 abuts against one end of the transmission shaft 31.

[0025] One end of the sleeve pipe 25 is closed through a lower cover 33, the lower cover 33 abuts against one end of the compression spring 32 through an adjusting screw 34, and the screw head of the adjusting screw 34 is exposed from the operation opening of the lower cover 33. The screw head of the adjusting screw is screwed from the operation opening of the lower cover, the feed amount of the adjusting screw is adjusted, the adjusting screw is pushed to move axially to adjust the pressing amount of the adjusting screw, when the adjusting screw is screwed deeper, the axial pressure of the compression spring when the door is opened is greater, and the elastic force released by the compression spring when the door is closed is greater, and the closing force is greater.

[0026] One end of the transmission shaft 31 is formed into a shaft head 36 through the shaft shoulder 20, the shaft shoulder 20 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. The compression spring is abutted through the shaft shoulder and the pressure bearing, and the shaft head extends into the compression spring, so that the compression spring can be limited in the radial direction, and the friction force between the compression spring and the sleeve pipe is avoided to increase the noise.

[0027] The transmission sleeve 26 is provided with a longitudinal slot 37 penetrating in the radial direction, one end of the shaft core 27 is provided with a helical groove 38 corresponding to the longitudinal slot 37, the front end of the piston rod 5 is provided with a penetrating pin hole 6, the other end of the transmission shaft 31 is connected with the pin hole 6 through a transmission pin 39, and the two ends of the transmission pin 39 are correspondingly installed in the helical groove 38 and pass out of the longitudinal slot 37. The helical groove 38 and the longitudinal slot 37 are driven through the transmission pin 39, so that 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.

[0028] The other end of the shaft core 27 is closed by the upper cover 40, which is abutted to the cylinder body 1 by the distance adjusting screw 41, the screw head of which corresponds to that of the oil control screw 15, and the screw head of the distance adjusting screw 41 is exposed from the operation port 42 of the upper cover 40. By screwing the screw head of the distance adjusting screw from the operation port of the upper cover, the feed amount of the distance adjusting screw is adjusted, the oil cylinder and the transmission shaft are pushed to move axially by the feed amount of the transmission shaft, and the deeper the shaft head of the transmission shaft enters the compression spring, the stronger the radial constraint of the compression spring, and the quieter the compression spring is.

[0029] The following is the action process of the buffer hinge when the door leaf is opened or closed:

[0030] When the door leaf is opened, the right leaf 23 is rotated to open relative to the left leaf 24, the transmission sleeve 26 is rotated, and the transmission pin 39 is moved downward along the spiral groove 38, the transmission pin 39 drives the shaft core 27 to rotate and drives the transmission shaft 31 to move axially upward through the longitudinal groove 37, the shaft shoulder 20 of the transmission shaft 31 and the pressure bearing 37 push the compression spring 32 to compress the energy storage, at the same time, the transmission shaft 31 drives the piston rod 5 and the piston 7 to slide out of the cylinder body 1, and the oil control needle 18 moves away from the piston 7 and the piston rod 5, at this time, the hydraulic oil flows from the oil storage cavity 8 to the pressure oil cavity 9 through the one-way valve.

[0031] When the external force of opening the right leaf 23 and the left leaf 24 disappears, the compression spring 32 releases the compressed energy storage to push the transmission shaft 31 to move axially upward through the longitudinal groove 37, and drives 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, and the automatic closing of the door is realized. At the same time, the piston rod 5 and the piston 7 slide into the cylinder body 1, the oil control needle 18 moves towards the piston 7 and the piston rod 5, at this time, the hydraulic oil slowly flows from the pressure oil cavity 9 to the oil storage cavity 8 through the gap between the longitudinal channel 11 and the oil control needle 18, thereby realizing the buffer closing of the door leaf. By screwing the oil control screw 15, the oil control screw 15 is transmitted along the end cover nut 13, the oil control screw 15 drives the oil control needle 18 to move in the cylinder body 1 to adjust the insertion amount of the oil control needle 18 with the needle rod taper 21, change the gap size between the needle rod taper 21 and the longitudinal channel 11 to control the oil flow, the deeper the oil control needle 18 is inserted, the smaller the gap between the oil control needle 18 and the longitudinal channel 11, and the smaller the oil flow from the pressure oil cavity 9 to the oil storage cavity 8 when the door is closed, the slower the closing speed is, and vice versa, thereby realizing the adjustment of the closing speed.

[0032] When the door is closed to 5 to 10 degrees before the angle (the angle can be adjusted by the control oil needle 18, turn the control oil screw 15, the control oil screw 15 along the end cover nut 13 screw drive, the control oil screw 15 drive control oil needle 18 movement in the cylinder 1 to adjust the distance between the control oil needle 18 on the shaft shoulder 20 and the relief hole 12 on the piston 7, the smaller the distance, the greater the angle before the closure, the greater the distance, the smaller the angle before the closure), the piston 7 and the piston rod 5 approach the tail end of the control oil needle 18, the relief hole 12 and the shaft shoulder 20 are aligned at this time, the relief hole 12 and the shaft shoulder 20 form a relief gap, the hydraulic oil in the pressure oil chamber 9 returns to the oil storage chamber 8 through the shaft shoulder 20 from the relief hole 12, so that the hydraulic oil in the pressure oil chamber 9 is relieved, so that the transmission mechanism connected by the piston rod 7 drives the two leaves to be completely closed, and then drives the door to be closed quickly and smoothly into the lock before 5 to 10 degrees.

Claims

1. A cushioned hinge, comprising: The application relates to a hydraulic cylinder, which comprises a right page sheet (23), a left page sheet (24), an oil cylinder (A), a transmission shaft and a sleeve (25), a transmission sleeve (26) and a shaft core (27) arranged along the same axis in sequence, the right page sheet (23) is sleeved and fixed to the transmission sleeve (26), the left page sheet (24) is sleeved and fixed to the sleeve (25), the transmission sleeve (26) is rotatably sleeved to the shaft core (27), the shaft core (27) is rotatably sleeved to the transmission shaft (31), a compression spring (32) is arranged in the sleeve (25), one end of the compression spring (32) abuts against one end of the sleeve (25), the other 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 to 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 power-connected to the oil cylinder (A), the transmission shaft (31) can be driven to move axially through the relative rotation of the transmission sleeve (26) and the shaft core (27), and the transmission sleeve (26) and the shaft core (27) can be driven to relatively rotate through the axial movement of the transmission shaft (31).

2. The bumper hinge of claim 1, wherein, The oil cylinder (A) comprises a cylinder body (1), both ends of the cylinder body (1) are sealed, a piston (7) is slidably arranged in the cylinder body (1), the piston (7) is arranged in the cylinder body (1) through a first oil seal (22), the piston (7) extends out of one end of the cylinder body (1) through a piston rod (5), a control oil needle (18) is arranged at the other end of the cylinder body (1), the piston (7) forms an oil storage cavity (8) on the side of the piston rod (5), the other side of the piston (7) forms a pressure oil cavity (9), the piston (7) and the piston rod (5) are provided with a communicating channel, the piston (7) is provided with a one-way valve for guiding the communication between the oil storage cavity (8) and the pressure oil cavity (9), the outer edge of the piston (7) is provided with a pressure relief hole (12), the pressure relief hole (12) is communicated with the channel, the control oil needle (18) is slidably arranged in the channel, the middle part of the control oil needle (18) is provided with a shaft shoulder (20), and the front end of the control oil needle (18) is provided with a needle rod taper (21).

3. The cushioned hinge of claim 2, wherein, The channel is T-shaped, the horizontal channel (10) of the channel is arranged on the end face of the piston (7), the vertical channel (11) of the channel is communicated with the piston (7) and the piston rod (5), the pressure relief hole (12) is communicated with the vertical channel (11), and the front end of the control oil needle (18) slides into the vertical channel (11) from the horizontal channel (10).

4. A cushioned hinge according to claim 2 or 3, characterised in that, The tail end of the control oil needle (18) is fixed to a control oil screw (15), the outer edge of the control oil screw (15) is threadedly connected with an end cover nut (13), the outer edge of the end cover nut (13) is threadedly connected with the inner thread of the cylinder body (1), the end cover nut (13) is arranged at the other end of the cylinder body (1) through a second oil seal (14), and the control oil screw (15) is arranged in the end cover nut (13) through a third oil seal (16).

5. The bumper hinge of claim 2, wherein, 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 outside to inside, and 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 inside to outside.

6. The bumper hinge of claim 2, wherein, The transmission sleeve (26) is provided with a longitudinal slot (37) penetrating in the radial direction, one end of the shaft core (27) is provided with a helical slot (38) corresponding to the longitudinal slot (37), the front end of the piston rod (5) is provided with a penetrating pin hole (6), the pin hole (6) is connected with the other end of the transmission shaft (31) through a transmission pin (39), both ends of the transmission pin (39) are correspondingly installed in the helical slot (38) and pass out of the longitudinal slot (37).

7. The bumper hinge of claim 4, wherein, The other end of the shaft core (27) is closed by the upper cover (40), the upper cover (40) is abutted to the cylinder (1) by the distance adjusting screw (41), the screw head of the distance adjusting screw (41) corresponds to the screw head of the oil control screw (15), and the screw head of the distance adjusting screw (41) is exposed from the operation port (42) of the upper cover (40).

8. The bumper hinge of claim 1, wherein, One end of the sleeve (25) is closed by the lower cover (33), the lower cover (33) is abutted to one end of the compression spring (32) by the pressure adjusting screw (34), and the screw head of the pressure adjusting screw (34) is exposed from the operation port of the lower cover (33).

9. The bumper hinge of claim 1, wherein, One end of the transmission shaft (31) forms a shaft head (36) through a shaft shoulder (20), the shaft shoulder (20) is abutted to the compression spring (32) through the pressure bearing (43) sleeved on the shaft head (36), and the shaft head (36) extends into the compression spring (32).

10. The bumper hinge of claim 1, wherein, A part of the right page sheet (23) is sleeved on the sleeve (25), another part of the right page sheet (23) is sleeved on the transmission sleeve (26), the right page sheet (23) is fixed to the transmission sleeve (26) through the key connection (28), a part of the left page sheet (24) is sleeved on the shaft core (27) through the needle roller bearing (29), another part of the left page sheet (24) is sleeved on the sleeve (25), the left page sheet (24) is fixed to the sleeve (25) through the key connection (28), and the right page sheet (23) and the left page sheet (24) are axially abutted through the ball bearing (30).

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