Damper and hydraulic hinge

Abstract

A damper comprises a shell and a damping assembly arranged in an inner cavity of the shell, the damping assembly divides the inner cavity of the shell into a first oil cavity and a second oil cavity and comprises a first piston and a second piston, the first piston is rotationally installed on the second piston, and the second piston is installed on the shell. The first piston is provided with a runner and a through hole communicated with the first oil cavity, the runner is arranged in the circumferential direction of the first piston, the side portion of the second piston is provided with an oil outlet communicated with the second oil cavity, the through hole is communicated with the runner, and the through hole is communicated with the oil outlet through a middle runner. The flow channel and the through hole communicated with the first oil cavity are formed in the first piston, the oil outlet communicated with the second oil cavity is formed in the side portion of the second piston, the through hole is communicated with the flow channel, the through hole is communicated with the oil outlet through the middle flow channel, and when the second piston rotates relative to the first piston, the oil outlet moves along the flow channel so as to adjust the length of the middle flow channel. Therefore, the flowing speed and the resistance of the damping oil are changed, and the damping force is adjusted.

Description

Technical Field

[0001] The utility model relates to the technical field of dampers, in particular to a damper and a hydraulic hinge. Background Art

[0002] Chinese patent document CN202148752U, published on February 22, 2012, discloses a hydraulic door-closing buffer hinge comprising a left hinge, a right hinge, a one-way rotary hydraulic damper, and a connecting rod. The sleeves on the left and right hinges are interlaced and sleeved on the connecting rod. The one-way rotary hydraulic damper is mounted in the sleeve, and the connecting rod is coaxially fixedly connected to the rotating shaft of the one-way rotary hydraulic damper. A boss is provided on the side of the connecting rod. The incomplete annular boss portion of the boss, which extends along the circumference of the connecting rod, is embedded in a circumferential notch in the lower portion of the sleeve of the right hinge, forming a circumferential gap in the notch of the sleeve. The hydraulic damper of this buffer hinge cannot adjust the damping force, and therefore is suitable for a narrow range of door weights.

[0003] Therefore, further improvements are necessary. Utility Model Content

[0004] The purpose of the utility model is to provide a damper and a hydraulic hinge with a simple structure, convenient adjustment, a wide range of applicable door weights, low cost and strong practicality, so as to overcome the shortcomings of the prior art.

[0005] A damper designed for this purpose includes a shell and a damping assembly arranged in the inner cavity of the shell, characterized in that the damping assembly divides the inner cavity of the shell into a first oil chamber and a second oil chamber, and the damping assembly includes a first piston and a second piston, the first piston is rotatably mounted on the second piston, the second piston is mounted on the shell, the first piston is provided with a flow channel and a through hole connected to the first oil chamber, the flow channel is arranged along the circumferential direction of the first piston, the side of the second piston is provided with an oil outlet connected to the second oil chamber, the through hole is connected to the flow channel, and the through hole is connected to the oil outlet through an intermediate flow channel. When the second piston rotates relative to the first piston, the oil outlet moves along the flow channel to adjust the length of the intermediate flow channel, and the part of the flow channel that connects the through hole and the oil outlet constitutes the intermediate flow channel.

[0006] The damping assembly telescopically moves within the housing, a first sealing ring and a guide groove connected to the first oil chamber are provided between the second piston and the housing, and an oil passage groove connected to the second oil chamber is provided on the inner side of the housing; when the damping assembly is extended, the guide groove and the oil passage groove are not connected; when the damping assembly is contracted, the guide groove and the oil passage groove are connected.

[0007] A non-circular movable cavity is provided on the inner cavity of the shell, and the second piston is movably provided on the movable cavity. The second piston is non-circular. When the shell rotates, the second piston is driven to rotate relative to the first piston to adjust the length of the intermediate flow channel.

[0008] The first piston is provided with a rotating head, the second piston is provided with a rotating hole, the rotating head is inserted into the rotating hole, and the rotating head and the rotating hole are rotated together, the flow channel is provided on the side of the rotating head along the circumferential direction, and the oil outlet is provided on the side wall of the rotating hole.

[0009] One end of the rotating head is provided with an abutment head, the abutment head abuts against the second piston, and the through hole is provided on the abutment head.

[0010] The damping assembly also includes a piston rod, a cover body is provided at one end of the shell, one end of the piston rod is connected to the first piston, and the other end of the piston rod is telescopically movable through the cover body and then extends out of the shell; a sealing assembly is provided between the cover body and the damping assembly.

[0011] One end of the piston rod is provided with a connecting shaft for connecting the mounting accessories, and the mounting accessories drive the damping assembly to move telescopically in the shell through the connecting shaft.

[0012] Also included is a first elastic member;

[0013] The first elastic member is arranged on the inner cavity of the housing and acts between the damping assembly and the housing, or the first elastic member is arranged outside the housing and acts between the connecting shaft and the cover;

[0014] When the mounting accessory drives the damping assembly to extend through the connecting shaft, the first elastic member stretches to release energy; when the mounting accessory drives the damping assembly to contract through the connecting shaft, the first elastic member compresses to store energy.

[0015] The other end of the shell is provided with an action portion and a threaded portion for connecting the mounting accessories. When the tool acts on the action portion, the shell rotates.

[0016] A hydraulic hinge designed for this purpose is characterized in that it includes a loose-leaf assembly, a cam assembly, a sleeve assembly, a first adjusting assembly and the damper, the cam assembly includes a cam and a movable shaft, the movable shaft and the piston rod are movably arranged in the inner hole of the cam, the cam is provided with a spirally extending movable groove, the connecting shaft is relatively movably arranged on the movable groove, the cam, the movable shaft and the piston rod are connected by the connecting shaft, the sleeve assembly includes a first sleeve and a second sleeve, the first sleeve is connected to the cam, the second sleeve is slidably connected to the movable shaft, the first sleeve and the shell are locked with each other by fasteners, the loose-leaf assembly includes a first page and a second page, the first page and the second sleeve are connected, and the second page and the first sleeve are connected; the first adjusting assembly includes a second elastic member and a first adjusting nut, the second elastic member is arranged in the second sleeve, the first adjusting nut is axially adjusted and arranged at one end of the second sleeve, and the second elastic member is arranged between the first adjusting nut and the movable shaft.

[0017] The utility model provides a flow channel and a through hole connected to the first oil chamber on the first piston, and an oil outlet connected to the second oil chamber on the side of the second piston. The through hole is connected to the flow channel, and the through hole is connected to the oil outlet via an intermediate flow channel. When the second piston rotates relative to the first piston, the oil outlet moves along the flow channel to adjust the length of the intermediate flow channel, thereby changing the flow speed and resistance of the damping oil, thereby realizing the adjustment of the damping force, making the hydraulic hinge suitable for a wider range of door weights; in addition, when adjusting the damping force, it is only necessary to insert the hexagonal wrench into the hexagonal hole of the shell and rotate it, which makes the adjustment very convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the exploded structure of the damping assembly in one embodiment of the present invention.

[0019] Figure 2 Schematic diagram of the overall structure of the damping assembly in one embodiment of the present invention.

[0020] Figure 3 This is a cross-sectional view of a damper in a first application example of an embodiment of the present utility model.

[0021] Figure 4 This is a cross-sectional view of a damper in a second application example of an embodiment of the present utility model.

[0022] Figure 5 This is a cross-sectional view of a damper in a second application example of an embodiment of the present utility model.

[0023] Figure 6 This is a schematic diagram of the exploded structure of the damper in the first application example of an embodiment of the present utility model.

[0024] Figure 7 This is a partial structural cross-sectional view of a hydraulic hinge in a second application example of an embodiment of the present utility model.

[0025] Figure 8 This is a partial structural exploded view of the hydraulic hinge in the second application example of an embodiment of the present utility model.

[0026] Figure 9 This is a schematic diagram of the overall structure of the hydraulic hinge in one embodiment of the present invention.

[0027] Figure 10 The figure is a schematic diagram of the exploded structure of the hydraulic hinge in one embodiment of the present invention.

[0028] Figure 11 This is a cross-sectional view of a hydraulic hinge in a second application example of an embodiment of the present utility model.

[0029] Figure 12 This is a diagram of the closing force of the hydraulic hinge during the automatic door closing movement in one embodiment of the present invention.

[0030] Figure 13 This is a diagram of the door closing damping of the hydraulic hinge during the automatic door closing movement in one embodiment of the present invention.

[0031] Figure 14 This is a diagram of the closing speed of the hydraulic hinge during the automatic door closing movement in one embodiment of the present invention. DETAILED DESCRIPTION

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0033] See also Figures 1-14 The damper comprises a housing 1 and a damping assembly disposed within the interior of the housing 1. The damping assembly divides the interior of the housing 1 into a first oil chamber 2 and a second oil chamber 3. The damping assembly also comprises a first piston 4 and a second piston 5. The first piston 4 is rotatably mounted on the second piston 5, which is mounted on the housing 1. The first piston 4 is provided with an arcuate flow channel 8 and a through hole 7 communicating with the first oil chamber 2. The flow channel 8 is arranged along the circumferential direction of the first piston 4. An oil outlet 9 communicating with the second oil chamber 3 is provided on the side of the second piston 5. The through hole 7 communicates with one end of the flow channel 8, which is connected to the oil outlet 9 via an intermediate flow channel. When the second piston 5 rotates relative to the first piston 4, the oil outlet 9 moves along the flow channel 8 to adjust the length of the intermediate flow channel, thereby changing the flow rate and resistance of the damping oil. The longer the intermediate flow channel, the smaller the damping oil flow rate and the greater the damping force. The shorter the intermediate flow channel, the greater the damping oil flow rate and the smaller the damping force. The portion of the flow channel 8 connecting the through hole 7 and the oil outlet 9 constitutes the intermediate flow channel.

[0034] The damping assembly telescopically moves in the housing 1, and a first sealing ring 10 and a guide groove 11 connected to the first oil chamber 2 are provided between the second piston 5 and the housing 1, and an oil passage groove 12 connected to the second oil chamber 3 is provided on the inner side of the housing 1; when the damping assembly extends, the guide groove 11 is not connected to the oil passage groove 12; when the damping assembly contracts, the guide groove 11 is connected to the oil passage groove 12; when the position of the first sealing ring 10 is higher than the position of the oil passage groove 12, the guide groove 11 is not connected to the oil passage groove 12. At this time, there is resistance when the damping assembly moves downward and contracts, that is, the damper maintains a certain resistance, so that the hinge closes slowly. When the position of the first sealing ring 10 is not higher than the position of the oil passage groove 12, the guide groove 11 is connected to the oil passage groove 12, which can increase the flow of the damping oil. At this time, the resistance of the damping assembly when it moves downward and contracts becomes very small, and the damper has basically no resistance, so that there is no resistance when the hinge is closed to the end, and the door is quickly closed and locked.

[0035] An annular groove 22 is provided on the outer periphery of the second piston 5 , and the first sealing ring 10 is sleeved on the annular groove 22 .

[0036] A non-circular movable chamber 13 is provided on the inner cavity of the shell 1, and the second piston 5 is movably provided on the movable chamber 13. The second piston 5 has a non-circular shape. When the shell 1 rotates, the second piston 5 is driven to rotate relative to the first piston 4 to adjust the length of the intermediate flow channel; the movable chamber 13 and the second piston 5 are elliptical, so when the shell 1 rotates, the second piston 5 can be driven to rotate.

[0037] A rotating head 14 is provided on the first piston 4, and a rotating hole 15 is provided on the second piston 5. The rotating head 14 is inserted into the rotating hole 15, and the rotating head 14 and the rotating hole 15 are rotatably matched. The flow channel 8 is provided on the side of the rotating head 14 along the circumferential direction, and the oil outlet 9 is provided on the side wall of the rotating hole 15.

[0038] An abutment head 20 is provided at one end of the rotating head 14 . The abutment head 20 abuts against the second piston 5 . The through hole 7 is provided on the abutment head 20 .

[0039] The damping assembly also includes a piston rod 6. A cover body 16 is provided at one end of the shell 1. One end of the piston rod 6 is riveted to the first piston 4. The other end of the piston rod 6 telescopically moves through the cover body 16 and extends out of the shell 1. The damping assembly is limited and movable in the inner cavity of the shell 1; a sealing assembly is provided between the cover body 16 and the damping assembly; the sealing assembly includes a second sealing ring 17 and a gasket 23, and the third sealing ring 17 plays a sealing role to prevent the damping oil from leaking out of the shell 1.

[0040] One end of the piston rod 6 is penetrated by a connecting shaft 18 for connecting to a mounting accessory. The mounting accessory drives the damping assembly to telescopically move in the housing 1 via the connecting shaft 18 .

[0041] It also includes a first elastic member 19, which is a spring;

[0042] The first elastic member 19 is disposed on the inner cavity of the housing 1 and acts between the damping assembly (the second piston 5) and the housing 1. Alternatively, the first elastic member 19 is disposed outside the housing 1 and acts between the connecting shaft 18 and the cover 16. The first elastic member 19 is sleeved on the outer periphery of the piston rod 6.

[0043] When the mounting accessory drives the damping assembly to extend through the connecting shaft 18, the first elastic member 19 stretches to release energy; when the mounting accessory drives the damping assembly to contract through the connecting shaft 18, the first elastic member 19 compresses to store energy.

[0044] The other end of the housing 1 is provided with an acting portion 43 . When a tool acts on the acting portion 43 , the housing 1 rotates. The acting portion 43 is a hexagonal hole. The housing 1 can be rotated by inserting a hexagonal wrench into the hexagonal hole.

[0045] The other end of the housing 1 is provided with a threaded portion 21 for connecting with mounting accessories, and the threaded portion 21 is an external thread.

[0046] A gasket 42 is provided at the bottom of the second piston 5 , and the gasket 42 is sleeved on the piston rod 6 .

[0047] The hydraulic hinge includes a movable hinge assembly, a cam assembly, a sleeve assembly, a first adjustment assembly, a second adjustment assembly and the damper; the cam assembly includes a cam 24 and a movable shaft 25, the movable shaft 25 and the piston rod 6 are movably arranged in the inner hole of the cam 24, and a spirally extending movable groove 26 is provided on the cam 24. The connecting shaft 18 is relatively movably arranged on the movable groove 26. The cam 24, the movable shaft 25 and the piston rod 6 are connected by the connecting shaft 18. The sleeve assembly includes a first sleeve 27 and a second sleeve 28. The first sleeve 27 is connected to the cam 24 by a first pin 29, and the second sleeve 28 is slidably connected to the movable shaft 25 by a second pin 30. The first sleeve 27 and the housing 1 are locked with each other by a stop screw 31 to prevent the two from rotating relative to each other. The stop screw 31 passes through the through hole of the first sleeve 27 and cooperates with the threaded portion 21. The damper is arranged in the first sleeve 27.

[0048] The movable leaf assembly includes a first leaf 32 and a second leaf 33. The cam assembly is mounted within the first leaf 32. The first leaf 32 and the second sleeve 28 are connected by a third pin 34, and the second leaf 33 and the first sleeve 27 are connected by a fourth pin 35. When the movable leaf assembly rotates, the first leaf 32 drives the movable shaft 25 via the second sleeve 28. The connecting shaft 18 moves relative to the movable groove 26. Under the action of the movable groove 26, the connecting shaft 18 drives the movable shaft 25 to move axially up and down within the inner hole of the cam 24, and the movable shaft 25 drives the damping assembly to extend and retract.

[0049] A bearing 36 is provided between the first leaf 32 and the second leaf 33 .

[0050] The first adjusting assembly includes a second elastic member 37 and a first adjusting nut 38. The second elastic member 37 is arranged in the second sleeve 28. The first adjusting nut 38 is axially adjusted at one end of the second sleeve 28. The second elastic member 37 is arranged between the first adjusting nut 38 and the movable shaft 25. The upper end cover of the second sleeve 28 is covered with a first cover 39. The second elastic member 37 is a spring. When the first adjusting nut 38 is axially adjusted, the elastic force of the second elastic member 37 is adjusted, and then the size of the hinge closing force is adjusted. By adjusting the size of the closing force and the damping force, it is suitable for a wide range of door weights and is more convenient to install and adjust. When the hinge assembly rotates forward (opening the door), the movable shaft 25 moves upward and acts on the second elastic member 37 to compress the stored energy and pull out the damping assembly. When the hinge assembly rotates reversely (closing the door), the second elastic member 37 stretches to release energy, and the movable shaft 25 drives the damping assembly to contract downward.

[0051] The second adjustment assembly includes a second cover 40 and a second adjustment nut 41 . The second cover 34 covers the lower end of the first sleeve 27 . The second adjustment nut 41 is axially adjustable and arranged at the lower end of the first sleeve 27 . The lower end of the housing 1 abuts against the second adjustment nut 41 .

[0052] When closing the door at 90°-30° (slow closing zone), the elastic force of the second elastic member 37 changes from large to small, the hydraulic damping changes from large to small, and the closing speed changes from slow to fast. When closing the door at 30°-15° (fast closing zone), the elastic force of the second elastic member 37 changes from large to small, the hydraulic damping changes from large to small, and the closing speed does not change much. When closing the door at 15°-0° (silent and locking conversion zone), faster closing and slow closing can be converted.

[0053] The hydraulic hinges (including door closers) on the market are usually faster in the front section (90°-30°) and slower in the back section (30°-0°) when closing the door automatically.

[0054] Most doors can only be opened to 90°-100°. If you are holding items in both hands, it is very inconvenient. You need to use one hand to hold the item and the other hand to open the door back and forth twice. This hydraulic hinge solves this problem very well. When the door is automatically closed, the front section (90°-30°) of the door closing is usually slower, and the back section (30°-0°) of the door closing is slightly faster, with a slight collision sound. Although most doors can only be opened to 90°-100°, you can still pass through smoothly if you are holding items in both hands.

[0055] See also Figure 12 During the automatic door closing movement, the force of the second elastic member 37 changes linearly from large to small, and the force of the second elastic member 37 is adjustable.

[0056] See also Figure 13 The hydraulic damping of the hydraulic hinges on the market is a constant value during the automatic closing process. The hydraulic damping of this hydraulic hinge changes from large to small during the automatic closing process, and the maximum value of the hydraulic damping is adjustable.

[0057] See also Figure 14 The hydraulic hinges on the market can automatically close the door at a speed that changes from fast to slow, 0°-15° silent, and can be switched to locked during the automatic closing process; the hydraulic hinges can automatically close the door at a speed that changes from slow to fast, 0°-15° silent, and can be switched to locked during the automatic closing process.

[0058] The hydraulic hinge of the utility model has the following advantages:

[0059] 1. The movement mode of the hydraulic hinge door closing in the market has been changed. The hydraulic hinge door closing in the market automatically closes from fast to slow, which is inconvenient for people to enter and exit. The utility model automatically closes the door from slow to slow and fast, which is more convenient for entering and exiting.

[0060] 2. The door closing force and damping are adjustable, and the silent and locking modes can be switched. During the automatic door closing process, the door closing force changes from large to small, and the door closing damping changes from large to small.

[0061] 3. The force and damping are adjustable, with a wider range of applications and easier adjustment to the ideal state;

[0062] 4. During the automatic door closing process, the closing speed changes from slow to fast, which is more convenient for walking, especially for people with limited mobility.

[0063] The above is a preferred embodiment of the present invention, which illustrates and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A damper comprising a housing (1) and a damping assembly arranged in an inner cavity of the housing (1), characterized in that: The damping assembly divides the inner cavity of the housing (1) into a first oil cavity (2) and a second oil cavity (3), and the damping assembly includes a first piston (4) and a second piston (5). The first piston (4) is rotatably mounted on the second piston (5), and the second piston (5) is mounted on the housing (1). A flow channel (8) and a through hole (7) communicating with the first oil cavity (2) are provided on the first piston (4). The flow channel (8) is arranged along the circumferential direction of the first piston (4). An oil outlet (9) communicating with the second oil cavity (3) is provided on the side of the second piston (5). The through hole (7) is connected to the flow channel (8), and the through hole (7) is connected to the oil outlet (9) through the intermediate flow channel. When the second piston (5) rotates relative to the first piston (4), the oil outlet (9) moves along the flow channel (8) to adjust the length of the intermediate flow channel. The portion of the flow channel (8) that connects the through hole (7) and the oil outlet (9) constitutes the intermediate flow channel.

2. The damper according to claim 1, characterized in that: The damping assembly telescopically moves within the housing (1); a first sealing ring (10) and a guide groove (11) communicating with the first oil chamber (2) are provided between the second piston (5) and the housing (1); an oil passage groove (12) communicating with the second oil chamber (3) is provided on the inner side of the housing (1); when the damping assembly is extended, the guide groove (11) is disconnected from the oil passage groove (12); when the damping assembly is retracted, the guide groove (11) is communicated with the oil passage groove (12).

3. The damper according to claim 1, characterized in that: A non-circular movable cavity (13) is provided on the inner cavity of the housing (1), and a second piston (5) is movably provided on the movable cavity (13). The second piston (5) is non-circular, and when the housing (1) rotates, the second piston (5) is driven to rotate relative to the first piston (4) to adjust the length of the intermediate flow channel.

4. The damper according to claim 1, characterized in that: A rotating head (14) is provided on the first piston (4), a rotating hole (15) is provided on the second piston (5), the rotating head (14) is inserted into the rotating hole (15), and the rotating head (14) and the rotating hole (15) are rotatably matched, the flow channel (8) is provided on the side of the rotating head (14) along the circumferential direction, and the oil outlet (9) is provided on the side wall of the rotating hole (15).

5. The damper according to claim 4, characterized in that: An abutment joint (20) is provided at one end of the rotating head (14), the abutment joint (20) abuts against the second piston (5), and the through hole (7) is provided on the abutment joint (20).

6. The damper according to claim 1, characterized in that: The damping assembly further comprises a piston rod (6), a cover body (16) is provided at one end of the housing (1), one end of the piston rod (6) is connected to the first piston (4), and the other end of the piston rod (6) is telescopically movable to pass through the cover body (16) and then extend out of the housing (1); a sealing assembly is provided between the cover body (16) and the damping assembly.

7. The damper according to claim 6, characterized in that: One end of the piston rod (6) is provided with a connecting shaft (18) for connecting to a mounting accessory, and the mounting accessory drives the damping component to telescopically move within the housing (1) via the connecting shaft (18).

8. The damper according to claim 7, characterized in that: Also includes a first elastic member (19); The first elastic member (19) is arranged on the inner cavity of the housing (1) and acts between the damping assembly and the housing (1); or the first elastic member (19) is arranged outside the housing (1) and acts between the connecting shaft (18) and the cover (16); When the mounting accessory drives the damping component to extend through the connecting shaft (18), the first elastic member (19) stretches and releases energy; when the mounting accessory drives the damping component to contract through the connecting shaft (18), the first elastic member (19) compresses and stores energy.

9. The damper according to claim 3, characterized in that: The other end of the housing (1) is provided with an action portion (43) and a threaded portion (21) for connecting with a mounting accessory, and the housing (1) rotates when a tool acts on the action portion (43).

10. A hydraulic hinge, characterized in that: The invention comprises a movable leaf assembly, a cam assembly, a sleeve assembly, a first adjustment assembly and a damper as claimed in claim 7, wherein the cam assembly comprises a cam (24) and a movable shaft (25), wherein the movable shaft (25) and the piston rod (6) are movably arranged in the inner hole of the cam (24), and a spirally extending movable groove (26) is provided on the cam (24), and the connecting shaft (18) is relatively movably arranged on the movable groove (26), and the cam (24), the movable shaft (25) and the piston rod (6) are connected by the connecting shaft (18), and the sleeve assembly comprises a first sleeve (27) and a second sleeve (28), wherein the first sleeve (27) is connected to the cam (24), and the second sleeve ( 28) is slidably connected to the movable shaft (25), the first sleeve (27) and the housing (1) are locked with each other by fasteners, the movable leaf assembly includes a first leaf (32) and a second leaf (33), the first leaf (32) is connected to the second sleeve (28), and the second leaf (33) is connected to the first sleeve (27); the first adjustment assembly includes a second elastic member (37) and a first adjustment nut (38), the second elastic member (37) is arranged in the second sleeve (28), the first adjustment nut (38) is axially adjusted and arranged at one end of the second sleeve (28), and the second elastic member (37) is arranged between the first adjustment nut (38) and the movable shaft (25).

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