CN219241666U

CN219241666U - Hidden buffer hinge

Info

Publication number: CN219241666U
Application number: CN202222756985.3U
Authority: CN
Inventors: 陈炳宣
Original assignee: Zhaoqing Gaoyao Zhongtianming Hardware Technology Co ltd
Current assignee: Zhaoqing Gaoyao Zhongtianming Hardware Technology Co ltd
Priority date: 2022-10-19
Filing date: 2022-10-19
Publication date: 2023-06-23
Anticipated expiration: 2032-10-19

Abstract

The utility model discloses a hidden buffer hinge which comprises a first connecting seat, a second connecting seat, an articulated arm assembly and a damping oil cylinder, wherein the damping oil cylinder comprises a cylinder barrel, a rotating shaft assembly, a piston and an energy storage spring, the rotating shaft assembly is in relative rotation fit with the cylinder barrel, the piston is axially and slidably arranged in the cylinder barrel and is in spiral fit with the rotating shaft assembly, one end of the rotating shaft assembly is provided with a through hole leading to the inside of the cylinder barrel, a push rod is inserted in the through hole, and the energy storage spring is arranged in the cylinder barrel and is in compression joint between the piston and the push rod; one end of the hinge arm assembly is hinged with the first connecting seat, the other end of the hinge arm assembly is connected with the cylinder barrel and is hinged with the second connecting seat, and the damping cylinder is connected with the second connecting seat through the outer end of the rotating shaft assembly; the mounting surface of the second connecting seat is provided with a force adjusting screw, and the force adjusting screw pushes the ejector rod through the inclined block assembly so as to drive the inclined block assembly to push the ejector rod and the energy storage spring driven by the ejector rod, so that the initial elastic force adjustment of the energy storage spring is realized, and the operation is convenient.

Description

Hidden buffer hinge

Technical Field

The utility model relates to a hidden hinge, in particular to a hidden buffer hinge.

Background

Chinese patent No. ZL201922463281.5 discloses a hidden buffering hinge in 2020, 10 months and 2 days, comprising: the device comprises a shell, a left support arm, a left functional shaft, a right shell, a right support arm and a right functional shaft, wherein the rotation energy of the right support arm enables the left functional shaft to store energy, the release energy of the left functional shaft enables the right support arm to reset, the rotation energy of the left support arm enables the right functional shaft to store energy, and the release energy of the right functional shaft enables the left support arm to reset. The hinge of this structure can not adjust the dynamics of opening the door, remains to improve.

Disclosure of Invention

The utility model aims to provide the hidden buffer hinge which is simple and reasonable in structure, convenient to install and convenient to adjust force.

The purpose of the utility model is realized in the following way:

the hidden buffer hinge comprises a first connecting seat, a second connecting seat, an articulated arm assembly and a damping oil cylinder, wherein the damping oil cylinder comprises a cylinder barrel, a rotating shaft assembly, a piston and an energy storage spring, the rotating shaft assembly is in relative rotation fit with the cylinder barrel, the piston is axially and slidably arranged in the cylinder barrel and is in spiral fit with the rotating shaft assembly, one end of the rotating shaft assembly is provided with a through hole leading to the inside of the cylinder barrel, a push rod is inserted in the through hole, the energy storage spring is arranged in the cylinder barrel and is in compression joint between the piston and the push rod, hydraulic oil is filled in the cylinder barrel, and the inside of the cylinder barrel is sealed and separated from the outside; one end of the hinge arm assembly is hinged with the first connecting seat, the other end of the hinge arm assembly is connected with the cylinder barrel and is hinged with the second connecting seat, and the damping oil cylinder is transversely arranged in the second connecting seat and is connected with the second connecting seat through the outer end of the rotating shaft assembly; and a force adjusting screw is arranged on the mounting surface of the second connecting seat and pushes the ejector rod through the inclined block component. The mounting surface is the exposed surface of the second connecting seat which is connected behind the door body or the door frame.

The aim of the utility model can be also solved by adopting the following technical measures:

as a more specific scheme, the rotating shaft component is provided with a sliding slot hole corresponding to the oblique block component, and the outer end of the ejector rod stretches into the sliding slot hole; the oblique block assembly comprises a lower oblique block and an upper oblique block which are in sliding fit with each other in an inclined plane, one side of the lower oblique block, which is back to the upper oblique block, is propped against the outer end of the ejector rod, and the upper side of the upper oblique block is propped against the force adjusting screw.

As a further scheme, the top surface of the second connecting seat is the mounting surface, a concave cavity is formed in the mounting surface, cylinder seats are detachably arranged at two ends of the corresponding damping cylinder in the concave cavity, the cylinder seats are connected with the outer ends of the rotating shaft assembly, and the force adjusting screws are arranged on the top surfaces of the corresponding cylinder seats.

As a further scheme, the cylinder seat comprises a first cylinder seat and a second cylinder seat, the rotating shaft assembly comprises a first rotating shaft and a second rotating shaft, a first guide groove is axially formed in the inner end of the first rotating shaft, the piston is inserted into the first guide groove and is in spiral fit with the first guide groove, a first shaft head is arranged at the outer end of the first rotating shaft, and the first shaft head is connected with the first cylinder seat; the inner end of the second rotating shaft is axially provided with a second guide groove, a pressing plate is axially arranged in the second guide groove in a sliding manner, the outer end of the second rotating shaft is provided with a second shaft head, the sliding groove hole is formed in the side wall of the second shaft head, two ends of the through hole are respectively led to the second guide groove and the sliding groove hole, and the pressing plate is in compression joint between the energy storage spring and the inner end of the ejector rod; the second cylinder seat is provided with a second shaft hole matched with the second shaft head, the top surface of the second cylinder seat is provided with a screw hole communicated with the second shaft hole, and the force adjusting screw penetrates through the screw hole and stretches into the slide slot hole.

As a further scheme, the periphery of the piston is sequentially provided with an annular groove, a spiral groove and a guide block, the annular groove is positioned at one end close to the first rotating shaft, a sealing ring is arranged outside the annular groove, a first oil passing hole penetrating through two ends of the piston is formed in the piston, and a one-way flow limiting valve is arranged in the first oil passing hole; the inner wall of the first guide groove of the first rotating shaft is provided with a ball and a ball positioning groove, and the ball falls into the ball positioning groove and the spiral groove at the same time; the inner wall of the cylinder barrel is provided with an axial guide groove, and the guide block is exposed out of the first rotating shaft and is in linear sliding fit with the axial guide groove.

As a further scheme, the first shaft head is provided with a central hole, a speed regulating cock is spirally connected in the central hole, the inner end of the speed regulating cock is provided with a valve needle, and the periphery of one end of the valve needle, which is close to the speed regulating cock, is provided with a necking section; the center of the piston is provided with a second oil passing hole penetrating through two ends of the piston, one end of the piston, facing the energy storage spring, is provided with a cavity, the first oil passing hole and the second oil passing hole are respectively communicated with the cavity, and the valve needle is inserted into the second oil passing hole and is in clearance fit with the second oil passing hole; and a yielding opening communicated with the central hole is formed in one end of the first connecting seat, corresponding to the first shaft head.

As a further scheme, a first shaft shoulder is arranged on the periphery of the first rotating shaft corresponding to the first shaft head, a first annular cambered surface groove is formed in the first shaft shoulder, a first shaft sleeve is sleeved outside the first shaft head, a second annular cambered surface groove is formed in the first shaft sleeve towards the first annular cambered surface groove, a plurality of first steel balls are arranged between the first annular cambered surface groove and the second annular cambered surface groove, the first shaft sleeve is positioned in one end of the cylinder barrel, and a sealing ring is arranged between the outer ring surface and the inner ring surface of the first shaft sleeve and the inner wall of the cylinder barrel and the periphery of the first shaft head respectively; the outer end side wall of the first shaft head is also provided with a tangential surface and is in sleeve joint fit with the gear ring, the periphery of the gear ring is provided with insections, the first cylinder seat is provided with a first shaft hole, and the first shaft hole is in interference fit with the insections on the periphery of the gear ring.

As a further scheme, a second shaft shoulder is arranged at the periphery of the second shaft corresponding to the second shaft head, a third annular cambered surface groove is arranged on the second shaft shoulder, a second shaft sleeve is sleeved outside the second shaft head, a fourth annular cambered surface groove is arranged towards the third annular cambered surface groove, a plurality of second steel balls are arranged between the third annular cambered surface groove and the fourth annular cambered surface groove, the second shaft sleeve is positioned in the other end of the cylinder barrel, and sealing rings are respectively arranged between the outer ring surface and the inner ring surface of the second shaft sleeve and the inner wall and the periphery of the second shaft head; the side wall of the outer end of the second shaft head is also provided with a tangential plane which is matched with a second shaft hole of the second cylinder seat.

As a further scheme, the inner walls of the cylinder barrel are provided with first bearing platforms corresponding to the inner end surfaces of the first shaft sleeve and the second shaft sleeve, and the inner walls of the cylinder barrel are provided with second bearing platforms corresponding to the inner ends of the first rotating shaft and the second rotating shaft.

As a further scheme, the hinge arm assembly comprises a first connecting rod, a second connecting rod and a third connecting rod, one end of the first connecting rod and one end of the second connecting rod are respectively hinged on a shaft seat, and the shaft seat is detachably connected with the first connecting seat; the other end of the first connecting rod is hinged with one end of a third connecting rod, the middle part of the second connecting rod is hinged with the middle part of the third connecting rod, and the other end of the third connecting rod is hinged with the cylinder seat; the outer wall of the cylinder barrel is provided with a hinge lug, and the other end of the second connecting rod is hinged with the hinge lug.

As a further scheme, the first connecting rod is in a groove shape, the second connecting rod is in a U shape, the third connecting rod is in a T shape, one end of the third connecting rod is a narrow end and is embedded into the groove of the first connecting rod, and the middle part of the third connecting rod is embedded into the middle part of the second connecting rod; the outer wall of the cylinder barrel is provided with two hinge lugs, the two hinge lugs extend into the opening end of the second connecting rod, and a spacer bush is arranged between the two hinge lugs.

The beneficial effects of the utility model are as follows:

(1) The energy storage spring in the damping cylinder of the hidden buffering hinge is adjustable in strength, and the inclined block assembly is driven to push the ejector rod and the energy storage spring driven by the ejector rod through rotating the force adjusting screw on the mounting surface of the second connecting seat, so that the initial elastic force adjustment of the energy storage spring is realized, and the operation is convenient.

(2) When the hidden buffer hinge works, the piston moves linearly when the rotating shaft assembly of the damping oil cylinder and the cylinder barrel rotate relatively, and when the hinge is opened, the piston moves towards the direction of the energy storage spring, and the energy storage spring is gradually compressed for energy storage; when the hinge is closed, the energy storage spring releases elasticity and drives the piston to move, and the piston drives the rotating shaft assembly to rotate.

Drawings

FIG. 1 is an exploded view of an embodiment of the present utility model.

Fig. 2 is a schematic diagram of another exploded structure of the present utility model.

Fig. 3 is a schematic view of the assembled structure of the present utility model.

FIG. 4 is a schematic view of an angle exploded structure of the damping cylinder according to the present utility model.

FIG. 5 is a schematic view of another angle exploded view of the damping cylinder of the present utility model.

FIG. 6 is an exploded view of the rear end spool assembly of the damping cylinder of the present utility model.

Fig. 7 is a schematic view of another angle structure of fig. 6.

Fig. 8 is an exploded view of a head-end shaft assembly of a damping cylinder according to the present utility model.

Fig. 9 is a schematic diagram of a cylinder structure of a damping cylinder according to the present utility model.

Fig. 10 is a schematic diagram of a front view structure of the present utility model.

FIG. 11 is a schematic view of the cross-sectional structure A-A of FIG. 10.

Fig. 12 is a schematic view showing a bottom view of the damping cylinder according to the present utility model.

Fig. 13 is a schematic view of the cross-sectional B-B structure of fig. 12.

Fig. 14 is a schematic structural view of another embodiment of the cylinder barrel in the present utility model.

Detailed Description

The utility model is further described below with reference to the accompanying drawings and examples:

referring to fig. 1 to 13, a hidden buffer hinge comprises a first connecting seat 10, a second connecting seat 20, an articulated arm assembly 40 and a damping oil cylinder 60, wherein the damping oil cylinder 60 comprises a cylinder barrel 1, a rotating shaft assembly, a piston 3 and an energy storage spring 2, the rotating shaft assembly is in relative rotation fit with the cylinder barrel 1, the piston 3 is axially and slidably arranged in the cylinder barrel 1 and is in spiral fit with the rotating shaft assembly, one end of the rotating shaft assembly is provided with a through hole 72 leading to the interior of the cylinder barrel 1, a push rod 6 is inserted into the through hole 72, the energy storage spring 2 is arranged in the cylinder barrel 1 and is pressed between the piston 3 and the push rod 6, hydraulic oil is filled in the interior of the cylinder barrel 1, and the interior is sealed and isolated from the outside (as shown by an arrow in C, D, E, F, G, H, I in fig. 11 and 13, and is a sealing ring); one end of the hinge arm assembly 40 is hinged with the first connecting seat 10, the other end of the hinge arm assembly 40 is connected with the cylinder barrel 1 and is hinged with the second connecting seat 20, and the damping oil cylinder 60 is transversely arranged in the second connecting seat 20 and is connected with the second connecting seat 20 through the outer end of the rotating shaft assembly; the second connecting seat 20 is provided with a force adjusting screw 503 on the mounting surface, and the force adjusting screw 503 pushes the ejector rod 6 through the oblique block assembly.

The rotating shaft assembly is provided with a sliding slot hole 73 corresponding to the inclined block assembly, and the outer end of the ejector rod 6 stretches into the sliding slot hole 73; the oblique block assembly comprises a lower oblique block 62 and an upper oblique block 63 which are in sliding fit with each other in an inclined plane, one side of the lower oblique block 62, which is back to the upper oblique block 63, is propped against the outer end of the ejector rod 6, and the upper side of the upper oblique block 63 is propped against the force adjusting screw 503.

The top surface of the second connecting seat 20 is the mounting surface, a concave cavity is arranged on the mounting surface, cylinder seats are detachably arranged at two ends of the concave cavity corresponding to the damping cylinder 60, the cylinder seats are connected with the outer ends of the rotating shaft assembly, and the force adjusting screws 503 are arranged on the top surfaces of the corresponding cylinder seats.

The cylinder seat comprises a first cylinder seat 70 and a second cylinder seat 50, the rotating shaft assembly comprises a first rotating shaft 4 and a second rotating shaft 7, a first guide groove 44 is axially formed in the inner end of the first rotating shaft 4, the piston 3 is inserted into the first guide groove 44 and is in spiral fit with the first guide groove, a first shaft head 42 is arranged at the outer end of the first rotating shaft 4, and the first shaft head 42 is connected with the first cylinder seat 70; the inner end of the second rotating shaft 7 is axially provided with a second guide groove, a pressing plate 61 is axially and slidably arranged in the second guide groove, the outer end of the second rotating shaft 7 is provided with a second shaft head 71, the sliding groove hole 73 is arranged on the side wall of the second shaft head 71, two ends of the through hole 72 are respectively led to the second guide groove and the sliding groove hole 73, and the pressing plate 61 is in compression joint between the energy storage spring 2 and the inner end of the ejector rod 6; the second cylinder seat 50 is provided with a second shaft hole 502 matched with the second shaft head 71, the top surface of the second cylinder seat 50 is provided with a screw hole communicated with the second shaft hole 502, and the force adjusting screw 503 penetrates through the screw hole and stretches into the slide slot hole 73. The two ends of the concave cavity of the second connecting seat 20 are provided with a second bearing platform 201, the outer sides of the first cylinder seat 70 and the second cylinder seat 50 are respectively provided with a second boss 701 and a third boss 501, and the first cylinder seat 70 and the second cylinder seat 50 are respectively embedded into the end of the concave cavity and are respectively connected with the corresponding second bearing platform 201 in an adjustable way through the second boss 701 and the third boss 501.

The periphery of the piston 3 is sequentially provided with an annular groove, a spiral groove 34 and a guide block 35, the annular groove is positioned at one end close to the first rotating shaft 4, a sealing ring is arranged outside the annular groove, the piston 3 is provided with a first oil passing hole 32 penetrating through two ends of the piston, and a one-way flow limiting valve 37 is arranged in the first oil passing hole 32; the inner wall of the first guide groove 44 of the first rotating shaft 4 is provided with a ball 31 and a ball positioning groove 45, and the ball 31 falls into the ball positioning groove 45 and the spiral groove 34 at the same time; the inner wall of the cylinder barrel 1 is provided with an axial guide groove 14, and a guide block 35 is exposed out of the first rotating shaft 4 and is in linear sliding fit with the axial guide groove 14. The ball positioning grooves 45 are symmetrically arranged in two and are positioned on the inner end surface of the first rotating shaft 4. The first oil passing hole 32 is a stepped hole, the one-way flow limiting valve 37 is a small ball, the small ball is arranged in the first oil passing hole 32, and a riveting point protrudes inwards towards one end of the first oil passing hole 32, facing the first rotating shaft 4, so as to prevent the small ball from falling out.

The piston 3 is also provided with an embedded groove 39, and a magnet 38 is arranged in the embedded groove to realize metal scraps generated after the magnetic damping cylinder 60 moves for a long time.

The first shaft head 42 is provided with a central hole 41, the central hole 41 is internally and spirally connected with a speed regulating cock 5, the inner end of the speed regulating cock 5 is provided with a valve needle 51, and the periphery of one end, close to the speed regulating cock 5, of the valve needle 51 is provided with a necking section 511; the center of the piston 3 is provided with a second oil passing hole 33 penetrating through two ends of the piston, one end of the piston 3, facing the energy storage spring 2, is provided with a cavity 36, the first oil passing hole 32 and the second oil passing hole 33 are respectively communicated with the cavity 36, and a valve needle 51 is inserted into the second oil passing hole 33 and is in clearance fit with the second oil passing hole 33; the first connecting seat 10 is provided with a relief opening 203 corresponding to the first shaft head 42 and communicating with the central hole 41. The inner end of the governor cock 5 is riveted to the needle 51, but the two can be rotated relative to each other.

The first rotating shaft 4 is provided with a first shaft shoulder 43 corresponding to the periphery of the first shaft head 42, the first shaft shoulder 43 is provided with a first annular cambered surface groove, the first shaft head 42 is sleeved with a first shaft sleeve 601, the first shaft sleeve 601 is provided with a second annular cambered surface groove towards the first annular cambered surface groove, a plurality of first steel balls 604 are arranged between the first annular cambered surface groove and the second annular cambered surface groove, the first shaft sleeve 601 is positioned in one end of the cylinder barrel 1, and a sealing ring is arranged between the outer ring surface and the inner ring surface of the first shaft sleeve 601 and the inner wall of the cylinder barrel 1 and the periphery of the first shaft head 42 respectively; the outer end side wall of the first shaft head 42 is also provided with a tangential plane which is in sleeve joint fit with the gear ring 602, the periphery of the gear ring 602 is provided with insections, the first cylinder seat 70 is provided with a first shaft hole 702, and the first shaft hole 702 is in interference fit with the insections of the periphery of the gear ring 602.

The second rotating shaft 7 is provided with a second shoulder corresponding to the periphery of the second shaft head 71, a third annular cambered surface groove is formed in the second shoulder, a second shaft sleeve 603 is sleeved outside the second shaft head 71, a fourth annular cambered surface groove is formed in the second shaft sleeve 603 towards the third annular cambered surface groove, a plurality of second steel balls 605 are arranged between the third annular cambered surface groove and the fourth annular cambered surface groove, the second shaft sleeve 603 is positioned in the other end of the cylinder barrel 1, and sealing rings are respectively arranged between the outer annular surface and the inner annular surface of the second shaft sleeve 603 and the inner wall of the cylinder barrel 1 and the periphery of the second shaft head 71; the outer side wall of the second axle head 71 is further provided with a tangential plane, and is matched with the second axle hole 502 of the second cylinder base 50.

The two end ports of the cylinder 1 are bent inwards to form a flanging so as to prevent the first shaft sleeve 601 and the second shaft sleeve 603 from falling out. In addition, the first shaft head 42 and the second shaft head 71 are respectively provided with a first annular groove and a second annular groove corresponding to the first shaft sleeve 601 and the second shaft sleeve 603, and a first clamping spring J and a second clamping spring K are respectively arranged in the first annular groove and the second annular groove.

The peripheries of the first shaft head 42 and the second shaft head 71 are also provided with clamping grooves, the side surface of the cylinder seat is screwed with locking screws, and the locking screws extend into the clamping grooves so as to prevent the shaft heads from loosening from the cylinder seat, which is not shown in the figure.

The inner wall of the cylinder 1 is provided with a first bearing platform 15 corresponding to the inner end surfaces of the first shaft sleeve 601 and the second shaft sleeve 603, and the inner wall of the cylinder 1 is provided with a second bearing platform 13 corresponding to the inner ends of the first rotating shaft 4 and the second rotating shaft 7.

The hinge arm assembly 40 comprises a first connecting rod 401, a second connecting rod 402 and a third connecting rod 403, one end of the first connecting rod 401 and one end of the second connecting rod 402 are respectively hinged on the shaft seat 30, and the shaft seat 30 is detachably connected with the first connecting seat 10; the other end of the first connecting rod 401 is hinged with one end of a third connecting rod 403, the middle part of the second connecting rod 402 is hinged with the middle part of the third connecting rod 403, and the other end of the third connecting rod 403 is hinged with the cylinder seat; the outer wall of the cylinder barrel 1 is provided with a hinge lug 11, and the other end of the second connecting rod 402 is hinged with the hinge lug 11. A groove is formed in one end of the first connecting seat 10, corresponding to the hinge arm assembly 40, a first bearing platform 102 is arranged at two ends of the groove, connecting blocks 101 are arranged at two ends of the first connecting seat 10 in a split mode, and the connecting blocks 101 are connected with the first connecting seat 10 in an adjustable mode; the outer side of the shaft seat 30 is provided with a first boss 301, and the shaft seat 30 is embedded into the end part of the groove and is adjustably connected with the first bearing platform 102 through the first boss 301. The two ends of the second connecting seat 20 are provided with connecting wings in an outward turning manner. In order to improve the aesthetic property of the product, the connecting block 101 and the connecting wings can be further provided with decorative cover plates, and the decorative cover plates can be provided with pins for being in plug-in fit with the connecting block 101 or the connecting wings, which are not shown in the figure.

The first connecting rod 401 is in a groove shape, the second connecting rod 402 is in a U shape, the third connecting rod 403 is in a T shape, one end of the third connecting rod 403 is a narrow end and is embedded in the groove of the first connecting rod 401, and the middle part of the third connecting rod 403 is embedded in the middle part of the second connecting rod 402; the outer wall of the cylinder barrel 1 is provided with two hinge lugs 11, the two hinge lugs 11 extend into the opening end of the second connecting rod 402, and a spacer 404 is arranged between the two hinge lugs 11. As shown in fig. 14, the hinge lug 11 of the cylinder 1 may be a sleeve, and accordingly, after it is connected to the hinge arm assembly, a spacer may be omitted.

The connecting rods are hinged through pin shafts, sliding sleeves are arranged in holes matched with the connecting rods, flanges are arranged at the outer ends of the sliding sleeves, and the flanges are arranged between the connecting rods.

The working principle is as follows: it is assumed that the first and second connection seats 10 and 20 are connected to the door body and the door frame, respectively. Referring to fig. 11, when the door is opened, the hinge arm assembly drives the cylinder 1 to rotate relative to the rotating shaft assembly, the cylinder 1 drives the piston 3 to rotate at the same time, the piston 3 and the first rotating shaft 4 do screw motion, the piston 3 moves upwards and causes the energy storage spring 2 to compress, and meanwhile, in the rising process of the piston 3, the one-way flow limiting valve 37 is opened (the allowed oil amount is larger) so as to reduce the resistance of the piston 3. In addition, by tightening the force adjusting screw 503, the force adjusting screw 503 changes the component force direction through the inclined block assembly, so as to push the ejector rod 6 and the pressing plate 61 to compress the initial state of the energy storage spring 2, or by loosening the force adjusting screw 503, the pressure released by the energy storage spring 2 pushes the pressing plate 61, the ejector rod 6 and the inclined block assembly, so that the inclined block assembly moves towards the second cylinder seat 50 and is propped against the second cylinder seat 50 or the force adjusting screw 503, and loosening is avoided.

When the door is closed, the energy storage spring 2 releases the pressure, the piston 3 is pushed to move downwards, and drives the cylinder barrel 1 and the hinge arm assembly to rotate reversely, at the moment, the one-way flow limiting valve 37 is closed (oil passing can not be performed or the oil passing allowed is smaller), hydraulic oil below the piston 3 can only pass through a gap between the valve needle 51 and the second oil passing hole 33 slowly, and the function of slowly closing the door is achieved. When the second oil passing hole 33 of the plunger 3 moves down to the necking position 511 of the needle 51 (when the valve body is close), the gap between the second oil passing hole 33 and the needle 51 increases, and the oil passing speed increases, thus achieving rapid closing of the door. By rotating the governor cock 5, the relative distance between the necking position 511 and the second oil passing hole 33 is changed, so that the angle of fast closing is changed, and the slower the second oil passing hole 33 reaches the necking position 511 (or does not pass through the necking position 511), the slower the closing speed is, and even the whole-course slow mute closing can be realized.

The foregoing is a preferred embodiment of the utility model showing and describing the general principles, features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the foregoing embodiments, which have been described in the foregoing embodiments and description merely illustrates the principles of the utility model, and that various changes and modifications may be effected therein without departing from the spirit and scope of the utility model as defined in the appended claims and their equivalents.

Claims

1. The utility model provides a hide buffering hinge, including first connecting seat (10), second connecting seat (20), hinge arm subassembly (40) and damping hydro-cylinder (60), damping hydro-cylinder (60) are including cylinder (1), the pivot subassembly, piston (3) and energy storage spring (2), pivot subassembly and relative normal running fit of cylinder (1), piston (3) axial slip sets up in cylinder (1) and with pivot subassembly screw-type, the one end of pivot subassembly is equipped with the through-hole (72) that lead to the inside of cylinder (1), peg graft in through-hole (72) ejector pin (6), energy storage spring (2) set up in cylinder (1) and crimping between piston (3) and ejector pin (6), cylinder (1) inside still is poured with hydraulic oil, and its inside is sealed with the external world and separates; one end of the hinge arm assembly (40) is hinged with the first connecting seat (10), the other end of the hinge arm assembly (40) is connected with the cylinder barrel (1) and is hinged with the second connecting seat (20), and the damping oil cylinder (60) is transversely arranged in the second connecting seat (20) and is connected with the second connecting seat (20) through the outer end of the rotating shaft assembly; the method is characterized in that: and a force adjusting screw (503) is arranged on the mounting surface of the second connecting seat (20), and the force adjusting screw (503) pushes the ejector rod (6) through the inclined block component.

2. The hidden cushioning hinge of claim 1, wherein: the rotating shaft assembly is provided with a sliding slot hole (73) corresponding to the inclined block assembly, and the outer end of the ejector rod (6) stretches into the sliding slot hole (73); the oblique block assembly comprises a lower oblique block (62) and an upper oblique block (63) which are in oblique sliding fit with each other, one side of the lower oblique block (62) back to the upper oblique block (63) abuts against the outer end of the ejector rod (6), and the upper side of the upper oblique block (63) abuts against the force adjusting screw (503).

3. The hidden cushioning hinge of claim 2, wherein: the top surface of second connecting seat (20) is the installation face, is equipped with the cavity on the installation face, corresponds the both ends of damping hydro-cylinder (60) in the cavity and can dismantle and be equipped with the jar seat, jar seat with pivot subassembly's outer end is connected, force regulating screw (503) set up on corresponding jar seat top surface.

4. The hidden cushioning hinge of claim 3, wherein: the cylinder seat comprises a first cylinder seat (70) and a second cylinder seat (50), the rotating shaft assembly comprises a first rotating shaft (4) and a second rotating shaft (7), a first guide groove (44) is axially formed in the inner end of the first rotating shaft (4), the piston (3) is inserted into the first guide groove (44) and is in spiral fit with the first guide groove, a first shaft head (42) is arranged at the outer end of the first rotating shaft (4), and the first shaft head (42) is connected with the first cylinder seat (70); the inner end of the second rotating shaft (7) is axially provided with a second guide groove, a pressing plate (61) is axially and slidably arranged in the second guide groove, the outer end of the second rotating shaft (7) is provided with a second shaft head (71), the sliding groove hole (73) is formed in the side wall of the second shaft head (71), two ends of the through hole (72) are respectively led to the second guide groove and the sliding groove hole (73), and the pressing plate (61) is in compression joint between the energy storage spring (2) and the inner end of the ejector rod (6); the second cylinder seat (50) is provided with a second shaft hole (502) matched with the second shaft head (71), the top surface of the second cylinder seat (50) is provided with a screw hole communicated with the second shaft hole (502), and the force adjusting screw (503) penetrates through the screw hole and stretches into the slide groove hole (73).

5. The hidden cushioning hinge of claim 4, wherein: the periphery of the piston (3) is sequentially provided with an annular groove, a spiral groove (34) and a guide block (35), the annular groove is positioned at one end close to the first rotating shaft (4), a sealing ring is arranged outside the annular groove, the piston (3) is provided with a first oil passing hole (32) penetrating through two ends of the piston, and a one-way flow limiting valve (37) is arranged in the first oil passing hole (32); the inner wall of a first guide groove (44) of the first rotating shaft (4) is provided with a ball (31) and a ball positioning groove (45), and the ball (31) simultaneously falls into the ball positioning groove (45) and the spiral groove (34); the inner wall of the cylinder barrel (1) is provided with an axial guide groove (14), and a guide block (35) is exposed out of the first rotating shaft (4) and is in linear sliding fit with the axial guide groove (14).

6. The hidden cushioning hinge of claim 5, wherein: the first shaft head (42) is provided with a central hole (41), the central hole (41) is internally and spirally connected with a speed regulating cock (5), the inner end of the speed regulating cock (5) is provided with a valve needle (51), and the periphery of one end, close to the speed regulating cock (5), of the valve needle (51) is provided with a necking section (511); the center of the piston (3) is provided with a second oil passing hole (33) penetrating through two ends of the piston, one end of the piston (3) facing the energy storage spring (2) is provided with a cavity (36), the first oil passing hole (32) and the second oil passing hole (33) are respectively communicated with the cavity (36), and the valve needle (51) is inserted into the second oil passing hole (33) and is in clearance fit with the second oil passing hole (33); one end of the first connecting seat (10) corresponding to the first shaft head (42) is provided with a yielding opening (203) communicated with the central hole (41).

7. The hidden cushioning hinge of claim 4, wherein: the periphery of the first rotating shaft (4) corresponding to the first shaft head (42) is provided with a first shaft shoulder (43), the first shaft shoulder (43) is provided with a first annular cambered surface groove, the first shaft head (42) is sleeved with a first shaft sleeve (601), the first shaft sleeve (601) is provided with a second annular cambered surface groove towards the first annular cambered surface groove, a plurality of first steel balls (604) are arranged between the first annular cambered surface groove and the second annular cambered surface groove, the first shaft sleeve (601) is positioned in one end of the cylinder barrel (1), and a sealing ring is arranged between the outer ring surface and the inner ring surface of the first shaft sleeve (601) and the inner wall of the cylinder barrel (1) and the periphery of the first shaft head (42) respectively; the outer end side wall of the first shaft head (42) is also provided with a tangential plane which is in sleeve joint fit with the gear ring (602), the periphery of the gear ring (602) is provided with insections, the first cylinder seat (70) is provided with a first shaft hole (702), and the first shaft hole (702) is in interference fit with the insections on the periphery of the gear ring (602);

the second rotating shaft (7) is provided with a second shoulder corresponding to the periphery of the second shaft head (71), a third annular cambered surface groove is formed in the second shoulder, a second shaft sleeve (603) is sleeved outside the second shaft head (71), a fourth annular cambered surface groove is formed in the second shaft sleeve (603) towards the third annular cambered surface groove, a plurality of second steel balls (605) are arranged between the third annular cambered surface groove and the fourth annular cambered surface groove, the second shaft sleeve (603) is positioned in the other end of the cylinder barrel (1), and a sealing ring is arranged between the outer annular surface and the inner annular surface of the second shaft sleeve (603) and the inner wall of the cylinder barrel (1) and the periphery of the second shaft head (71) respectively; the outer end side wall of the second shaft head (71) is also provided with a tangential plane which is matched with a second shaft hole (502) of the second cylinder seat (50).

8. The hidden cushioning hinge of claim 7, wherein: the inner wall of cylinder (1) all corresponds the inner terminal surface of first axle sleeve (601) and second axle sleeve (603) and is equipped with first cushion cap (15), and the inner of the inner wall of cylinder (1) all corresponds first pivot (4) and second pivot (7) is equipped with second cushion cap (13).

9. The hidden cushioning hinge of claim 3, wherein: the hinge arm assembly (40) comprises a first connecting rod (401), a second connecting rod (402) and a third connecting rod (403), one end of the first connecting rod (401) and one end of the second connecting rod (402) are respectively hinged on the shaft seat (30), and the shaft seat (30) is detachably connected with the first connecting seat (10); the other end of the first connecting rod (401) is hinged with one end of a third connecting rod (403), the middle part of the second connecting rod (402) is hinged with the middle part of the third connecting rod (403), and the other end of the third connecting rod (403) is hinged with the cylinder seat; the outer wall of the cylinder barrel (1) is provided with a hinge lug (11), and the other end of the second connecting rod (402) is hinged with the hinge lug (11).

10. The hidden cushioning hinge of claim 9, wherein: the first connecting rod (401) is in a groove shape, the second connecting rod (402) is in a U shape, the third connecting rod (403) is in a T shape, one end of the third connecting rod (403) is a narrow end and is embedded into the groove of the first connecting rod (401), and the middle part of the third connecting rod (403) is embedded into the middle part of the second connecting rod (402); the outer wall of the cylinder barrel (1) is provided with two hinge lugs (11), the two hinge lugs (11) extend into the opening end of the second connecting rod (402), and a spacer bush (404) is arranged between the two hinge lugs (11).