Hydraulic buffering concealed hinge for door

Abstract

The utility model discloses a hydraulic buffering concealed hinge for a door, which comprises a mounting seat, an outer shaft sleeve is movably mounted on one side of the mounting seat, a hinge plate is fixedly mounted on one side of the outer shaft sleeve, an inner shaft sleeve is in threaded connection with the inside of the outer shaft sleeve, a hydraulic cylinder barrel, a piston and a piston sleeve are arranged in the inner shaft sleeve, and one end of the piston is connected with the hydraulic cylinder barrel. An oil needle of a conical structure is arranged in the hydraulic cylinder barrel, an oil needle sleeve is installed in the piston, one end of the oil needle is inserted into the oil needle sleeve, an adjusting screw is spirally installed on one end face of the hydraulic cylinder barrel, one end of the adjusting screw is fixedly connected with the oil needle, the other end of the adjusting screw protrudes out of the hydraulic cylinder barrel, and an adjusting hole is formed in the side face of the adjusting screw. According to the utility model, the hydraulic adjusting structure is optimized, the structures of the hydraulic hinge and the concealed hinge are perfectly fused, and even if the hinge is mounted in a door frame groove, the adjustor can be inserted into the adjusting hole in the side surface, so that the oil needle below the adjusting screw can be adjusted up and down to control the size of the damping channel.

Description

Technical Field

[0001] The utility model relates to the technical field of hinges, in particular to a hydraulic buffer concealed hinge for doors. Background Art

[0002] Hydraulic hinges are one of the common hinges with door closers on the market. They are also one of the earliest automatic door closing hinges that replace door closers. They realize automatic door closing through the rebound force of the spring, and control the door closing speed through the buffering effect of hydraulic damping to prevent wear and noise caused by strong impact between the door and the door frame when closing the door. At present, most hinges use traditional exposed hinges, and the rotating shafts of the door hinges are generally exposed, which are not in harmony with the overall environment when in use, affecting the overall appearance. With the continuous advancement of technology, people's requirements for the aesthetic performance and thermal insulation performance of the door body are gradually increasing. In the existing technology, concealed hinges have gradually begun to be used for connection. However, when installing the existing concealed hinges, deep grooves need to be opened on the side and door frame of the flat door to install the concealed hinges. When the thickness of the door body is small, the ordinary concealed hinges cannot be opened on the door body for installation due to size limitations, resulting in a small application range of the concealed hinges.

[0003] At the same time, the principle of automatic door closing of existing hydraulic hinges is mainly to insert an oil needle into the oil needle sleeve, and by adjusting the size of the gap between the oil needle and the oil needle sleeve, the size of the damping channel can be adjusted, and finally the purpose of controlling the closing speed is achieved. For example, the utility model patent "A Hydraulic Buffer Hinge" with publication number CN205297127U uses a screwdriver to insert from the bottom center hole of the hydraulic cylinder to adjust the depth of the oil needle in the oil needle sleeve. However, since the hydraulic cylinder of the concealed hinge is installed in a deep groove of the door frame or door body, it cannot be inserted and adjusted from the bottom of the hydraulic cylinder, which makes the existing hydraulic structure difficult to apply to concealed hinges. Utility Model Content

[0004] The utility model aims to provide a hydraulic buffer concealed hinge for a door in view of the deficiencies of the prior art, so as to solve the problems raised in the background technology.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A hydraulic buffer concealed hinge for a door comprises a mounting seat, one side of the mounting seat is provided with a mounting groove, an outer sleeve is movably installed in the mounting groove, a page plate is fixedly installed on one side of the outer sleeve, and the inner sleeve is threadedly connected to the outer sleeve, a hydraulic cylinder, a piston and a piston sleeve are arranged in the inner sleeve, one end of the piston is connected to the hydraulic cylinder, and the other end is connected to the piston sleeve, an oil needle with a conical structure is arranged in the hydraulic cylinder, an oil needle sleeve is installed in the piston, one end of the oil needle is inserted into the oil needle sleeve, a threaded hole is provided on one end surface of the hydraulic cylinder, an adjusting screw is spirally installed in the threaded hole, one end of the adjusting screw is fixedly connected to the oil needle, and the other end protrudes from the hydraulic cylinder and is provided with an adjusting hole on the side, and the adjusting hole can drive the oil needle under the adjusting screw to move up and down through an adjuster to adjust the depth.

[0007] As a preferred solution for hydraulic buffer concealed hinges for doors, the mounting seat includes a seat body, the mounting groove is located on the seat body, an upper connecting seat and a lower connecting seat are respectively installed at two ends of the mounting groove, a plane bearing is installed on the upper surface of the lower connecting seat, the outer sleeve is installed between the upper connecting seat and the lower connecting seat and can rotate relative to the seat body, connecting holes are provided on the opposite sides of the upper connecting seat and the lower connecting seat, bearings are installed at the connecting holes of the lower connecting seat, upper and lower ends of the inner sleeve are inserted into the connecting holes, and an adjustment port connected to the connecting hole is also provided on one side of the lower connecting seat, and the adjusting screw protrudes from one end of the inner sleeve and is located at the adjusting port for easy adjustment.

[0008] As a preferred solution for a hydraulic buffer concealed hinge for a door, one end of the piston sleeve away from the piston protrudes from the inner sleeve and is sleeved with a spline sleeve, one side of the spline sleeve is open, and the spline sleeve is connected to the upper connecting seat.

[0009] As a preferred solution for hydraulic buffer concealed hinges for doors, the outer wall of the inner sleeve is provided with external splines, the inner wall of the outer sleeve is provided with internal splines, the inner sleeve is inserted into the outer sleeve and movably connected thereto, and the outer sleeve can rotate relative to the inner sleeve.

[0010] As a preferred solution for the hydraulic buffer concealed hinge for the door, the outer wall of the adjusting screw is provided with a plurality of annular grooves, a first sealing ring is installed in the annular groove, and the first sealing ring abuts against the inner wall of the hydraulic cylinder.

[0011] As a preferred solution for hydraulic buffered concealed hinges for doors, a first mounting hole is provided on one end face of the piston, the oil needle sleeve is installed in the first mounting hole, the gap between the first mounting hole and the oil needle sleeve forms an oil return channel, an inner hole is provided at the center of one end of the oil needle sleeve, the oil needle is inserted into the inner hole, and the gap between the inner hole and the oil needle forms a damping channel.

[0012] As a preferred solution for the hydraulic buffer concealed hinge for the door, a second sealing ring is provided at the connection between the oil needle sleeve and the piston, and a third sealing ring is provided at the connection between the piston and the hydraulic cylinder.

[0013] As a preferred solution for hydraulic buffer concealed hinges for doors, a second mounting hole is provided on the side wall of one end of the piston away from the hydraulic cylinder, a first slide rod is installed in the second mounting hole, an inclined groove is provided on the side wall of one end of the piston sleeve, the first slide rod protrudes from the second mounting hole and is connected to the inclined groove, a spirally ascending strip through hole is provided on the side wall of one end of the piston away from the piston sleeve, a second slide rod is installed in the strip through hole, a third mounting hole is provided on the side wall of one end of the hydraulic cylinder, the second slide rod protrudes from the strip through hole and is connected to the third mounting hole.

[0014] As a preferred solution for the hydraulic buffer concealed hinge for a door, a spring is arranged in the piston sleeve, and the piston can move up and down in the inner sleeve to compress or release the spring.

[0015] Beneficial effects of the utility model:

[0016] (1) The hydraulic buffer concealed hinge of the utility model adopts a single-side slotted structural design. It only needs to slot one side of the door frame and the hydraulic hinge can be installed and used. This greatly simplifies the hinge transmission structure, reduces the space occupied by the hinge transmission structure, and has a more compact structure, which can be suitable for door leaves with smaller door body thickness.

[0017] (2) The hydraulic buffer concealed hinge of the utility model optimizes the hydraulic adjustment structure and perfectly integrates the structure of the hydraulic hinge and the concealed hinge. By opening an adjustment hole on the side of the adjusting screw on the oil needle and opening an adjustment port on the side of the mounting seat, even if the hinge is installed in the door frame groove, the adjuster can be inserted into the adjustment hole through the adjustment port on the side, thereby adjusting the oil needle under the adjusting screw up and down to control the size of the damping channel, thereby achieving the purpose of adjusting the door closing speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for use in the embodiments of the present utility model. Obviously, the drawings described below are only some embodiments of the present utility model, and for ordinary technicians in this field, other drawings can also be obtained based on these drawings without creative work.

[0019] Figure 1 The utility model is a schematic diagram of the overall structure of the hydraulic buffer concealed hinge for doors.

[0020] Figure 2 The utility model is a front structural schematic diagram of a hydraulic buffer concealed hinge for a door.

[0021] Figure 3 The utility model is a schematic diagram of the split structure of the hydraulic buffer concealed hinge for door.

[0022] Figure 4 It is a schematic diagram of the disassembled structure of the mounting seat described in the utility model.

[0023] Figure 5 It is a structural schematic diagram of the adjusting screw, piston and other related components described in the utility model.

[0024] In the figure:

[0025] 1. Mounting seat; 101. Mounting groove; 102. Seat body; 103. Upper connecting seat; 104. Lower connecting seat; 105. Plane bearing; 106. Connecting hole; 107. Adjusting port; 108. Bearing; 2. Outer bushing; 3. Leaf plate; 4. Inner bushing; 41. External spline; 5. Hydraulic cylinder; 6. Piston; 61. First mounting hole; 62. Second mounting hole; 63. First slide bar; 64. Strip perforation; 65. Second slide bar; 7. Piston sleeve; 71. Inclined groove; 8. Oil needle; 9. Oil needle sleeve; 10. Adjusting screw; 11. Adjusting hole; 12. Annular groove; 13. First sealing ring; 14. Second sealing ring; 15. Third sealing ring; 16. Spring; 17. Spline sleeve. DETAILED DESCRIPTION

[0026] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0027] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on this patent; in order to better illustrate the embodiments of the utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0028] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0029] In the description of the present invention, unless otherwise clearly specified and limited, if the term "connection" or the like appears to indicate the connection relationship between components, the term should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two components or the interaction relationship between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] like Figures 1 to 3As shown, the utility model provides a hydraulic buffer concealed hinge for a door, comprising a mounting seat 1 installed in a door frame groove, a mounting groove 101 being provided on one side of the mounting seat 1, an outer shaft sleeve 2 being movably installed in the mounting groove 101, a page plate 3 being fixedly installed on one side of the outer shaft sleeve 2, the page plate 3 being connected to the door body, an inner shaft sleeve 4 being internally threadedly connected to the outer shaft sleeve 2, a hydraulic cylinder 5, a piston 6 and a piston sleeve 7 being arranged in the inner shaft sleeve 4, wherein the hydraulic cylinder 5 and the inner shaft sleeve 4 are fixedly welded as an integral structure, one end of the piston 6 is connected to the hydraulic cylinder 5, and a closed cavity between the piston 6 and the hydraulic cylinder 5 forms an oil storage chamber, the other end of the piston 6 is connected to the piston sleeve 7, an oil needle 8 is arranged in the hydraulic cylinder 5, and the oil needle 8 is preferably a conical structure, a first mounting hole 61 is arranged on one end face of the piston 6, and an oil needle sleeve is installed in the first mounting hole 61 9. The gap between the first mounting hole 61 and the oil needle sleeve 9 forms an oil return channel. An inner hole is set at the center of one end of the oil needle sleeve 9, and the oil needle 8 is inserted into the inner hole. The gap between the inner hole and the oil needle 8 forms a damping channel. A threaded hole is opened at one end face of the hydraulic cylinder 5, and an adjusting screw 10 is spirally installed in the threaded hole. One end of the adjusting screw 10 is fixedly connected to the oil needle 8, and the other end protrudes from the hydraulic cylinder 5 and is provided with an adjusting hole 11 on the side. The installer can use the adjuster to insert it into the adjusting hole 11 and drive the adjusting screw 10 to rotate up and down along the threaded hole of the hydraulic cylinder 5, thereby driving the oil needle 8 under the adjusting screw 10 to move up and down along the inner hole of the oil needle sleeve 9. Since the oil needle 8 is a conical structure, when the oil needle 8 moves up and down, the size of the damping channel also changes accordingly. The closing speed can be controlled by changing the size of the damping channel.

[0031] The hydraulic buffer concealed hinge of the utility model adopts a single-side slotted structural design. The hydraulic hinge can be installed and used by only slotting one side of the door frame. This greatly simplifies the transmission structure of the hydraulic hinge, reduces the space occupied by the hydraulic hinge transmission structure, and has a more compact structure, which can be suitable for door leaves with smaller door body thickness.

[0032] like Figure 4As shown, the mounting seat 1 of the present embodiment specifically includes a seat body 102, a mounting groove 101 is located on the seat body 102, an upper connecting seat 103 and a lower connecting seat 104 are respectively installed at both ends of the mounting groove 101, a plane bearing 105 is installed on the upper surface of the lower connecting seat 104, the outer shaft sleeve 2 is installed between the upper connecting seat 103 and the lower connecting seat 104 and can rotate relative to the seat body 102, the upper connecting seat 103 and the lower connecting seat 104 are provided with connecting holes 106 on the sides facing each other, a bearing 108 is installed at the connecting hole of the lower connecting seat 104, and the bearing 108 can play a role in guiding and centering, the upper and lower ends of the inner shaft sleeve 4 are connected to the connecting hole 106, and an adjusting port 107 connected to the connecting hole 106 is also provided on one side of the lower connecting seat 104, the adjusting screw 10 protrudes from one end of the inner shaft sleeve 4 and is located at the adjusting port 107, after the mounting seat 1 is installed in the door frame slot, the installer can still adjust the adjusting screw 10 through the adjusting port 107 on the side.

[0033] More specifically, one end of the piston sleeve 7 away from the piston 6 protrudes from the inner sleeve 4 and is sleeved with a spline sleeve 17, and the spline sleeve 17 is connected to the upper connecting seat 103. At the same time, one side of the spline sleeve 17 is open. The function of the opening is to allow the spline sleeve 17 to shrink and fasten to the piston sleeve 7, thereby positioning the piston sleeve 7.

[0034] Preferably, the outer wall of the inner sleeve 4 of the present embodiment is provided with an external spline 41, and the inner wall of the outer sleeve 2 is provided with an internal spline. The inner sleeve 4 is inserted into the outer sleeve 2 and movably connected thereto. When the inner sleeve 4 is connected to the upper connecting seat 103 and the lower connecting seat 104, the outer sleeve 2 can rotate relative to the inner sleeve 4, thereby driving the door body on the page plate 3 to open or close.

[0035] like Figure 5 As shown, the outer wall of the adjusting screw 10 is provided with a plurality of annular grooves 12, and a first sealing ring 13 is installed in the annular groove 12. The first sealing ring 13 abuts against the inner wall of the hydraulic cylinder 5, and the first sealing ring 13 can prevent the hydraulic oil in the oil storage chamber from flowing out from the adjusting screw 10; a second sealing ring 14 is provided at the connection between the oil needle sleeve 9 and the piston 6. When the oil needle sleeve 9 moves toward the outside of the oil storage chamber, the oil needle sleeve 9 will press the second sealing ring 14, thereby blocking the oil return channel, and the hydraulic oil in the oil storage chamber can only slowly leak outward through the damping channel, so that the door is slowly closed to achieve a buffering effect; when the oil needle sleeve 9 moves toward the inside of the oil storage chamber, the oil needle sleeve 9 will loosen the second sealing ring 14, the oil return channel is opened, and the hydraulic oil outside the oil storage chamber flows back into the oil storage chamber through the oil return channel; a third sealing ring 15 is provided at the connection between the piston 6 and the hydraulic cylinder 5, and the third sealing ring 15 is used to seal the gap between the outer wall of the piston 6 and the inner wall of the hydraulic cylinder 5.

[0036] Specifically, a second mounting hole 62 is provided on the side wall of the end of the piston 6 away from the hydraulic cylinder 5, and a first slide rod 63 is installed in the second mounting hole 62. An inclined groove 71 is provided on the side wall of one end of the piston sleeve 7, and the first slide rod 63 protrudes from the second mounting hole 62 and is connected to the inclined groove 71. Since the first slide rod 63 and the inclined groove 71 are in a rolling fit, the friction is smaller during movement, the movement is smoother, and abnormal noise can be avoided during movement; a spirally ascending strip through hole 64 is provided on the side wall of the end of the piston 6 away from the piston sleeve 7, and a second slide rod 65 is installed in the strip through hole 64; a third mounting hole is provided on the side wall of one end of the hydraulic cylinder 5, and the second slide rod 65 protrudes from the strip through hole 64 and is connected to the third mounting hole.

[0037] A spring 16 is also provided in the piston sleeve 7 of this embodiment. The piston 6 can move up and down in the inner sleeve 4 to compress or release the spring 16. The spring 16 of this embodiment is provided inside the piston sleeve 7 and can be made very small in size, making the structure more compact.

[0038] The working principle of this utility model:

[0039] Door opening process (i.e. from the door closing state to the door opening state): the door is opened manually, the piston 6 is driven by the piston sleeve 7 to rotate and move toward the end close to the spring 16, the spring 16 is compressed, the space of the oil storage chamber expands, the oil pressure decreases, the oil needle sleeve 9 is pressed and moves toward the inside of the oil storage chamber, so that the second sealing ring 14 is loosened, the oil return channel is opened, and the hydraulic oil outside the oil storage chamber flows back into the oil storage chamber through the oil return channel;

[0040] Door closing process (i.e. from door open state to door closed state): the door automatically closes under the action of the rebound force of spring 16, spring 16 gradually resets, and piston 6 rotates and moves toward the end close to oil needle 8 under the drive of piston sleeve 7. The space in the oil storage chamber is compressed, the oil pressure increases, and the oil needle sleeve 9 is pressed to move toward the outside of the oil storage chamber, so that the second sealing ring 14 presses the piston 6 and blocks the oil return channel. The hydraulic oil in the oil storage chamber can only leak out slowly through the damping channel, so that the door closes slowly, achieving a buffering effect.

[0041] It should be noted that the above specific implementations are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art should understand that various modifications, equivalent substitutions, changes, etc. can be made to the present invention. However, as long as these changes do not deviate from the spirit of the present invention, they should be within the scope of protection of the present invention. In addition, some terms used in the specification and claims of this application are not restrictive, but are only for the convenience of description.

Claims

1. A hydraulic buffer concealed hinge for a door, characterized in that: The invention comprises a mounting seat (1), a mounting groove (101) is provided on one side of the mounting seat (1), an outer shaft sleeve (2) is movably installed in the mounting groove (101), a leaf plate (3) is fixedly installed on one side of the outer shaft sleeve (2), and an inner shaft sleeve (4) is internally threadedly connected to the outer shaft sleeve (2), a hydraulic cylinder (5), a piston (6) and a piston sleeve (7) are arranged in the inner shaft sleeve (4), one end of the piston (6) is connected to the hydraulic cylinder (5), and the other end is connected to the piston sleeve (7), and a conical An oil needle (8) of the structure is provided, an oil needle sleeve (9) is installed in the piston (6), one end of the oil needle (8) is inserted into the oil needle sleeve (9), one end surface of the hydraulic cylinder (5) is provided with a threaded hole, an adjusting screw (10) is spirally installed in the threaded hole, one end of the adjusting screw (10) is fixedly connected to the oil needle (8), and the other end protrudes from the hydraulic cylinder (5) and is provided with an adjusting hole (11) on the side, and the adjusting hole (11) can drive the oil needle (8) under the adjusting screw (10) to move up and down through a regulator to adjust the depth.

2. The hydraulic buffer concealed hinge for door according to claim 1, characterized in that: The mounting seat (1) comprises a seat body (102), the mounting groove (101) is located on the seat body (102), an upper connecting seat (103) and a lower connecting seat (104) are respectively mounted at both ends of the mounting groove (101), a plane bearing (105) is mounted on the upper surface of the lower connecting seat (104), the outer sleeve (2) is mounted between the upper connecting seat (103) and the lower connecting seat (104) and can rotate relative to the seat body (102), and the upper connecting seat (103) A connecting hole (106) is provided on the side facing the lower connecting seat (104), a bearing (108) is installed at the connecting hole (106) of the lower connecting seat (104), the upper and lower ends of the inner shaft sleeve (4) are inserted into the connecting hole (106), and an adjustment port (107) connected to the connecting hole (106) is also provided on one side of the lower connecting seat (104), and the adjustment screw (10) protrudes from one end of the inner shaft sleeve (4) and is located at the adjustment port (107) for easy adjustment.

3. The hydraulic buffer concealed hinge for door according to claim 2, characterized in that: One end of the piston sleeve (7) away from the piston (6) protrudes from the inner shaft sleeve (4) and is sleeved with a spline sleeve (17); one side of the spline sleeve (17) is open, and the spline sleeve (17) is connected to the upper connecting seat (103).

4. The hydraulic buffer concealed hinge for door according to claim 1, characterized in that: The outer wall of the inner sleeve (4) is provided with an external spline (41), and the inner wall of the outer sleeve (2) is provided with an internal spline. The inner sleeve (4) is inserted into the outer sleeve (2) and movably connected thereto, and the outer sleeve (2) can rotate relative to the inner sleeve (4).

5. The hydraulic buffer concealed hinge for door according to claim 2, characterized in that: The outer wall of the adjusting screw (10) is provided with a plurality of annular grooves (12), a first sealing ring (13) is installed in the annular groove (12), and the first sealing ring (13) abuts against the inner wall of the hydraulic cylinder (5).

6. The hydraulic buffer concealed hinge for door according to claim 1, characterized in that: A first mounting hole (61) is provided on one end surface of the piston (6), the oil needle sleeve (9) is installed in the first mounting hole (61), a gap between the first mounting hole (61) and the oil needle sleeve (9) forms an oil return channel, an inner hole is provided at the center of one end of the oil needle sleeve (9), the oil needle (8) is inserted into the inner hole, and a gap between the inner hole and the oil needle (8) forms a damping channel.

7. The hydraulic buffer concealed hinge for door according to claim 1, characterized in that: A second sealing ring (14) is provided at the connection between the oil needle sleeve (9) and the piston (6), and a third sealing ring (15) is provided at the connection between the piston (6) and the hydraulic cylinder barrel (5).

8. The hydraulic buffer concealed hinge for door according to claim 1, characterized in that: A second mounting hole (62) is provided on the side wall of one end of the piston (6) away from the hydraulic cylinder (5), and a first slide bar (63) is installed in the second mounting hole (62). An inclined groove (71) is provided on the side wall of one end of the piston sleeve (7), and the first slide bar (63) protrudes from the second mounting hole (62) and is connected to the inclined groove (71). A spirally ascending strip through hole (64) is provided on the side wall of one end of the piston (6) away from the piston sleeve (7), and a second slide bar (65) is installed in the strip through hole (64). A third mounting hole is provided on the side wall of one end of the hydraulic cylinder (5), and the second slide bar (65) protrudes from the strip through hole (64) and is connected to the third mounting hole.

9. The hydraulic buffer concealed hinge for door according to claim 1, characterized in that: A spring (16) is arranged in the piston sleeve (7), and the piston (6) can move up and down in the inner sleeve (4) to compress or release the spring (16).

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