CN212755450U

CN212755450U - Enhanced hydraulic rotary damper

Info

Publication number: CN212755450U
Application number: CN202020470271.4U
Authority: CN
Inventors: 王治恭
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-02
Filing date: 2020-04-02
Publication date: 2021-03-23
Anticipated expiration: 2030-04-02

Abstract

The utility model discloses an enhanced hydraulic rotary damper, which comprises a shaft sleeve with an oil cavity and a rotating shaft matched with the oil cavity sealing rotating flexible oil, wherein two rotor plates for flexible oil are radially and symmetrically arranged on an inner shaft section on the rotating shaft, two partition ribs on the oil cavity wall can be butted and attached with the radial surface of the inner shaft section and limit the rotation amplitude of the rotor plates, and reinforcing ribs for connecting the rotor plates and the root part of the inner shaft section are arranged on the inner side surface of a convex ring between the rotor plates; the spacer ribs are provided with adaptive surfaces which are in contact sliding fit with the surfaces of the reinforcing ribs; each rotor wing plate is provided with a step and an oil through hole, the valve plate is limited by an oil cover fixed on each rotor wing plate, the valve plate on the step can move horizontally to open or close the oil through hole, the valve plate closes the oil through hole, so that the oil pressure generated when the rotor wing plate slowly scrambles oil brakes the rotating shaft to slowly rotate, and the reinforcing ribs can improve the connection strength between the rotor wing plates and the rotating shaft and the capacity of resisting oil pressure impact; the valve plate is covered by the oil cover fixed on the rotor plate, so that the assembly efficiency is improved, and the assembly cost is reduced.

Description

Enhanced hydraulic rotary damper

Technical Field

The utility model relates to a damper for buffering the slow falling of a toilet cover plate, in particular to an enhanced hydraulic rotary damper.

Background

In order to eliminate the sound generated by the toilet cover plate turning and slapping the ceramic toilet, most toilet cover plates are provided with dampers for slow falling buffering, but the rotating shafts of the dampers generally have the problems of insufficient oil disturbing rotating angle and poor structural strength for resisting instant impact of damping oil pressure.

For example, the chinese utility model patent (CN208442197U) discloses a damper with adjustable damping, in which the inner disc surface 5-11 of the upper disc 5-1 of the shaft core 5 is vertically connected with the end of the wing plate 5-2, and the connection strength between the wing plate 5-2 and the inner disc surface 5-11 is not large enough to be easily broken under the impact of the damping oil pressure frequently borne by the wing plate 5-2 of the shaft core 5, which may cause the damping function of the damper to fail; in addition, in the damper, in order to install the one-way oil passing blade 4 capable of swinging on the wing plate 5-2 on the shaft core 5, the wing plate 5-2 needs to be provided with a blade groove 5-5, because the one-way oil passing blade 4 needs to have a certain swinging amplitude on the wing plate 5-2 and ensure the impact strength of the wing plate 5-2 for enduring oil pressure, the thickness of the wing plate 5-2 is generally made larger, the rotating amplitude of the wing plate 5-2 between two oil separating ribs 3-4 in the shaft sleeve 3 is reduced, the rotating angle of the shaft core 5 is reduced, the opening and closing angle of a toilet cover plate connected with the outer end of the shaft core 5 is reduced, the center of gravity is unstable when the toilet cover plate is opened and turned over, the toilet cover plate is easy to automatically turn over, and inconvenience is brought to people when the toilet cover plate is.

As another example, the adjustable rotary damper disclosed in the chinese utility model patent (CN201668342U) has a right angle at the intersection connection between the wing 4 on the shaft core 2 and the inner side of the disc body of the shaft core 2, so that the connection strength is not strong enough; although the fins 4 are not slotted to ensure the integrity and strength thereof, the oil passing structure design of the blades 5 assembled and matched with the fins 4 is too complex and weak (see paragraph [0021] line 5-7 of the specification, "the blades 5 comprise an arc-shaped main plate 51, oil sealing rib plates 52 and oil discharging rib plates 53 arranged at the front and rear sides of the arc-shaped main plate 51, a moving space for the fins 4 to axially rotate is formed between the oil sealing rib plates 52 and the oil discharging rib plates 53, a plurality of oil discharging notches 6 are arranged on the oil discharging rib plates 53 and the arc-shaped main plate 51"), and the space between the oil discharging rib plates 52 and 53 on the blades 5 is sleeved on the fins 4, so that the integrity of the oil passing check valve formed by the fins 4 and the blades 5 is poor, the integral assembly of the shaft core 2 and the blades 5 and the sleeving of the inner cavity of the barrel body 1 are inconvenient, and the assembly cost of the rotary buffer is higher.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problem, the utility model aims at providing an enhancement mode hydraulic pressure rotary damper, its pivot structural design not only can frequently tolerate the impact of hydraulic damping oil, still can not reduce the rotation range of pivot to pivot and valve plate can embolia simultaneously in the oil pocket of axle sleeve in the lump, can improve packaging efficiency greatly, reduction in production cost.

In order to achieve the above object, the utility model provides an enhancement mode hydraulic rotary damper, contain one the axle sleeve that has the oil pocket and one with the sealed rotating oil pocket complex pivot of scratching, the interior axial region radial symmetry of epaxial bulge loop one side sets up two rotor plates that are used for scratching oil, on the oil pocket wall two of symmetry separate muscle and interior axial region footpath face can conflict laminating and limit rotor plate amplitude of rotation, its characterized in that: the inner side surface of the convex ring between the rotor wing plates is provided with a reinforcing rib for connecting the rotor wing plates and the root part of the inner shaft section; the spacer ribs are provided with adaptive surfaces which are in contact sliding fit with the surfaces of the reinforcing ribs; each rotor wing plate is provided with a step and an oil through hole, each step is provided with a valve plate which can move in the upward direction of the rotor wing plate in a rotating way so as to open or close the oil through hole, and each rotor wing plate is embedded and fixed with an oil through cover to limit the valve plate on the step; the valve plate seals the oil through hole, so that the oil pressure braking rotating shaft generated when the rotor plate slowly flexes oil slowly rotates.

A partition plate vertically connected with the partition ribs is arranged in an oil cavity of the shaft sleeve, a bearing hole is formed in the middle of the partition plate, and a pivot shaft rotationally matched with the bearing hole is arranged at the end of the inner shaft section; the reinforcing rib is in a conical ring shape, and the adaptive surface on the partition rib is an inclined surface. The convex ring is in rotating fit with the oil cavity opening, and the pivot is in rotating fit with the bearing hole, so that the coaxial line of the rotor plate and the rotating shaft can stably and fixedly rotate; the adaptation surface on the spacer bar is in sliding fit with the surface of the reinforcing rib by adopting an inclined plane, so that when the inner shaft section is inserted into the oil cavity, the adaptation surface on the spacer bar is matched with the surface of the reinforcing rib to guide the rotating shaft, the area of an oil seal between the spacer bar and the convex ring is increased, and the sealing performance is enhanced.

The oil passing cover is provided with an arc-shaped wall which is in abutting sliding fit with the oil cavity wall, two oil passing walls which are connected with the arc-shaped wall and parallel to clamp two sides of the rotor wing plate, and a limiting wall which is connected with the arc-shaped wall and connected with the same-direction end of the oil passing walls; a space enclosed by the arc-shaped wall, the oil passing wall and the limiting wall forms a clamping groove for nesting the rotor plate; the limit wall is in contact sliding fit with the partition plate. Cross the nested fixing of oil blanket on the rotor plate, with the valve plate spacing install on the step of the flexible oil level of rotor plate, so can make the valve plate, cross oil blanket and rotor plate and assemble integratively, make things convenient for the valve plate, cross the oil blanket and rotor plate and pack into the oil pocket simultaneously in the lump, improve greatly the utility model discloses an assembly efficiency.

The limiting wall is provided with a concave arc-shaped surface, and the tail end part of the rotary wing plate is provided with a convex arc-shaped surface which is positioned and attached to the concave arc-shaped surface; two oil wall ends of one end of the clamping groove are provided with sleeving surfaces attached to the surfaces of the reinforcing ribs. When the rotary wing plate of the oil cover sleeve is assembled in place, the surface of the reinforcing rib is attached to the sleeve fitting surface, the concave arc surface and the convex arc surface are positioned and attached, and the tail end of the rotary wing plate is attached to the limiting wall at the tail end of the clamping groove.

And each oil passing wall is also provided with an oil passing notch which is normally communicated with the through clamping groove. So set up, as long as the oil through-hole is opened to the valve plate, the damping oil of rotor board both sides can be followed oil breach, draw-in groove, oil through-hole and passed through, makes the unable sealed hydraulic pressure that forms of oil pocket of rotor board both sides, can make the undamped fast revolution of pivot.

The oil through hole on the rotor wing plate is a reducing hole, the flaring of the oil through hole is arranged on the side of the rotor wing plate without the step, and the necking of the oil through hole is arranged on the side of the rotor wing plate with the step; the valve plate is separated from or blocks the necking so as to correspondingly open or close the oil through hole. When the damping oil flows to the necking from the flaring, certain pressure accumulation can be formed, the damping oil can quickly jack the valve plate to open the oil through hole, and the sensitivity of the valve plate to open the oil through hole is improved.

The rotating shaft is also sleeved with a backing ring which is padded outside the convex ring, and the rotating shaft is also sleeved with a gland which is used for jacking and pressing the backing ring and is welded and sealed with the front end of the shaft sleeve. And (3) padding a backing ring on the outer side of the convex ring of the rotating shaft, and then welding and fixing the gland with the front end of the shaft sleeve to complete the assembly between the rotating shaft and the shaft sleeve.

The bearing hole edges at two sides of each partition rib on the partition plate are provided with throttling ports which can enable damping oil at two sides of the partition rib to be communicated at the rear side of the partition plate, and the rear part of the shaft sleeve is provided with an adjusting nut used for sealing or adjusting the communicating opening of all the throttling ports. When the adjusting nut opens the throttling opening to adjust the communicated opening, the working hydraulic pressure adjustment of the rotating shaft can be realized, and the rotating speed of the rotating shaft in a hydraulic damping state can be realized.

The threaded hole at the rear part of the shaft sleeve is screwed with the adjusting nut, and a round hole is arranged between the threaded hole in the shaft sleeve and the partition plate; a cylinder on the adjusting nut is inserted into the round hole, and a rubber ring on the cylinder is sealed with the round hole; the adjusting nut is rotated to enable the cylindrical end surface to be tightly attached to the partition plate to seal the throttling openings or enable the cylindrical end surface to be separated from the partition plate to adjust the opening degree of all the throttling openings. When the adjusting nut is rotated to move backwards, so that the distance between the cylindrical end surface and the partition plate is increased, the opening degree of all the throttling openings is increased, namely the flow velocity of damping oil communicated through the throttling openings at the two sides of each partition rib is increased, the hydraulic damping born by the rotary wing plate in the oil cavity is reduced, and the speed of the rotating shaft in the damping state can be increased.

The utility model has the advantages as follows:

firstly, reinforcing ribs for connecting an inner shaft section and the root part of a rotor wing plate are additionally arranged on the convex ring surface, so that the connection strength and the oil pressure impact resistance of the rotor wing plate and the rotating shaft are greatly improved;

the valve plate is covered by the oil passing cover fixed on the rotor plate, so that the assembly speed between the rotating shaft and the oil cavity is improved, and the assembly cost can be reduced;

the oil holes are formed in the rotor wing plate, so that the bending strength of the rotor wing plate can be enhanced, the valve plate is arranged on the step on the side face of the rotor wing plate, and the rotation range of the rotating shaft can still meet the requirement of the turning angle for opening and closing the cover plate.

Drawings

Fig. 1 is an exploded view of the three-dimensional assembly structure of the present invention.

Fig. 2 is an exploded schematic view of the three-dimensional assembly structure of the present invention.

Fig. 3 is a third exploded view of the three-dimensional assembly structure of the present invention.

Fig. 4 is a fourth exploded view of the three-dimensional assembly structure of the present invention.

Fig. 5 is a perspective view of the present invention.

Fig. 6 is a schematic sectional view of the present invention.

Fig. 7 is a schematic sectional view of the present invention.

Fig. 8 is a structural sectional view of the rotating shaft hydraulic damping device of the present invention during operation.

Fig. 9 is a structural sectional view of the rotating shaft at the end of the hydraulic damping operation of the present invention.

Fig. 10 is a structural sectional view of the rotating shaft of the present invention during undamped operation.

The figures in the drawings are identified as: 10. a shaft sleeve; 11. an oil chamber; 12. a partition plate; 13. separating ribs; 14. an adaptation surface; 15. a bearing bore; 16. a choke; 17. a threaded hole; 18. a circular hole; 20. a rotating shaft; 21. a convex ring; 22. an inner shaft section; 23. a rotor plate; 24. reinforcing ribs; 25. a step; 26. oil passing through holes; 261. flaring; 262. necking; 27. a convex arc-shaped surface; 28. a pivot; 30. a valve plate; 40. an oil passing cover; 41. an arcuate wall; 42. oil passing wall; 43. a limiting wall; 44. a card slot; 45. an oil passing notch; 46. fitting the surfaces; 50. a backing ring; 60. a gland; 70. adjusting the nut; 71. a cylinder; 72. a cylindrical end face; 73. a rubber ring.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

The enhanced hydraulic rotary damper as shown in fig. 1-7 is mainly assembled by a shaft sleeve 10, a rotating shaft 20, two valve plates 30, two oil passing covers 40, a backing ring 50, a gland 60 and an adjusting nut 70.

As shown in fig. 1 and fig. 2, the structure of the rotating shaft 20, the two rotor plates 23 for scratching oil are radially and symmetrically arranged on the inner shaft section 22 on one side of the protruding ring 21 on the rotating shaft 20, the conical annular reinforcing rib 24 connecting the rotor plates 23 and the root of the inner shaft section 22 is arranged on the inner side surface of the protruding ring 21 between the rotor plates 23, each rotor plate 23 is provided with a step 25 and an oil through hole 26, the oil through hole 26 on the rotor plate 23 is a variable diameter hole, the flaring 261 of the oil through hole 26 is arranged on the side of the rotor plate 23 where the step 25 is not arranged, and the necking 262 of the oil through hole 26 is arranged on the side of the rotor plate 23 where the step 25 is arranged; the end of the swing plate 23 has a convex arc surface 27 and the end of the inner shaft section 22 has a pivot 28.

As shown in the shaft sleeve 10 structure shown in fig. 1 and fig. 2, the shaft sleeve 10 of the present invention has an oil cavity 11 which can be filled with damping oil, two symmetrical partition ribs 13 on the wall of the oil cavity 11 are vertically connected with a partition plate 12 arranged in the oil cavity 11, an adapting surface 14 which is in close contact sliding fit with the surface of a reinforcing rib 24 is arranged on the partition ribs 13, and the adapting surface 14 is an inclined surface; the middle of the partition plate 12 is provided with a bearing hole 15, the bearing holes 15 at two sides of each partition rib 13 on the partition plate 12 are provided with a throttling opening 16 along which damping oil at two sides of each partition rib 13 can be communicated at the rear side of the partition plate 12, the rear part in the shaft sleeve 10 is provided with a threaded hole 17, and a round hole 18 is arranged between the threaded hole 17 and the partition plate 12.

As shown in fig. 1 and 2, the oil passing cover 40 of the present invention has an arc wall 41 abutting against and sliding fitted to the wall of the oil chamber 11, two oil passing walls 42 connected to the arc wall 41 and parallel to and sandwiching the two sides of the rotor plate 23, and a limiting wall 43 connected to the arc wall 41 and to the oil passing wall 42 at the same direction; the space enclosed by the arc-shaped wall 41, the oil passing wall 42 and the limiting wall 43 forms a clamping groove 44 for nesting the rotor plate 23; the limiting wall 43 can be in close contact sliding fit with the partition board 12; each oil passing wall 42 is also provided with an oil passing notch 45 which is normally communicated with the through clamping groove 44; the two ends of the oil passing walls 42 at one end of the clamping groove 44 are provided with nesting surfaces 46 which are attached to the surfaces of the reinforcing ribs 24.

As shown in fig. 1-7, the adjusting nut 70 of the present invention is used for screwing with the screw hole 17 at the rear of the shaft sleeve 10, the adjusting nut 70 has a cylinder 71, the cylinder 71 has a cylinder end surface 72 that can tightly attach to the partition 12 to seal the throttling orifice 16 or leave the partition 12 to adjust the opening of all the throttling orifices 16, and the cylinder 71 is installed with a rubber ring 73 that can form a seal with the wall of the circular hole 18.

The assembly of the present invention is described in detail below:

as shown in fig. 1 and 2, the valve plate 30 is placed on the step 25 of the rotor plate 23; as shown in fig. 2 and 3, the rotor plate 23 is nested into the slot 44, the concave arc surface 431 on the limiting wall 43 is positioned and attached to the convex arc surface 27 at the end portion of the rotor plate 23, so that the oil passing cover 40 is fixedly mounted on the rotor plate 23 in place, the fitting surface 46 on the oil passing cover 40 is attached to the surface of the reinforcing rib 24, and the valve plate 30 is limited in the slot 44 by the oil passing cover 40 and rests on the step 25, that is, two integrated oil passing one-way valves with flexible oil are assembled on the two rotor plates 23. As shown in fig. 3-7, the inner shaft section 22 of the rotating shaft 20 is inserted into the oil chamber 11 of the shaft sleeve 10, two oil-passing check valves assembled by the rotor plate 23, the valve plate 30 and the oil-passing cover 40 are sleeved into the oil chamber 11 and located between the ribs 13, when the pivot shaft 28 is inserted into the bearing hole 15 of the partition plate 12 in place, the convex ring 21 on the rotating shaft 20 is sleeved with the front part of the opening of the oil chamber 11, and the rotor plate 23, the valve plate 30 and the oil-passing cover 40 are axially limited in the oil chamber 11; in the rotating direction of the rotating shaft 20, the adaptive surface 14 on the spacer rib 13 is in close fit with the surface of the reinforcing rib 24 on the inner side of the convex ring 21; as shown in fig. 8, the arc-shaped wall 41 of the oil passing cover 40 is in interference sliding fit with the wall of the oil chamber 11, and the limiting wall 43 of the oil passing cover 40 is in close sliding fit with the partition plate 12 in the oil chamber 11; then, the backing ring 50 is sleeved on the outer side surface of the convex ring 21 of the rotating shaft 20, the gland 60 is sleeved on the rotating shaft 20 to press the backing ring 50, and the gland 60 and the front end of the shaft sleeve 10 are fixed by wave soldering to form sealing. As shown in FIG. 4, damping oil is filled into the oil chamber 11 through the threaded hole 17 and the circular hole 18 to the orifice 16 of the partition plate 12, then the adjusting nut 70 is screwed with the threaded hole 17, the cylinder 71 moves in the circular hole 18, and the cylinder end surface 72 moves towards the partition plate 12 until the cylinder end surface 72 seals the orifice 16 or has a certain clearance with the partition plate 12 to adjust the opening of the flow passage communicated with the orifice 16. So far, accomplish the utility model discloses an assembly connection.

The operation principle and the concrete operation of the present invention will be described in detail below.

As shown in fig. 5, the rotating shaft 20 or the shaft sleeve of the present invention is connected to a toilet cover plate (not shown in the drawings), as shown in fig. 8, 9, 6 and 7, during the first half of the downward turning of the toilet cover plate, the rotating shaft 20 drives the inner shaft section 22 to rotate clockwise together, the arc-shaped wall of the oil passing cover 40 slides along the wall of the oil chamber 11, the surface of the reinforcing rib 24 slides against the adapting surface 14 on the partition rib 13, and the surface of the limiting wall 43 of the oil passing cover 40 slides against the surface of the partition plate 12 in the oil chamber 11; the rotor wing plate 23 and the oil passing cover 40 flex damping oil clockwise in the oil cavity 11, the damping oil in the oil cavity 11 reversely passes through the oil passing notch 45 of the oil passing cover 40 to push the valve plate 30 to the rotor wing plate 23, the valve plate 30 seals the necking 262 to cut off the damping oil to flow through the flaring 261 from the oil passing through hole 26, the damping oil rapidly passes through the gradual change gap between the surface of the inner shaft section 22 and the separating rib 13, so that the oil cavities on two sides of the rotor wing plate 23 cannot be sealed to form hydraulic pressure, namely the damping oil has no hydraulic resistance to the rotor wing plate 23, and therefore the cover plate turns downwards to drive the rotating shaft 20 to rotate quickly; when the cover plate is turned down to enter the lower half, two symmetrical separating ribs 13 on the wall of the oil chamber 11 form a seal with the surface of the inner shaft section 22, and since the valve plate 30 seals the oil through holes 26 on the rotor plate 23, the seal is formed between the separating ribs 13 and on both sides of the rotor plate 23 and the oil passing cover 40, and the damping oil on both sides of the rotor plate 23 and the oil passing cover 40 can only pass through the throttling port 16 (as shown in fig. 1 and 2) and the clearance between the partition plate 12 and the cylindrical end surface 72 of the adjusting thread 70 slowly, so that the hydraulic pressure difference is generated between the rotor plate 23 and both sides of the oil passing cover 40 in the oil scratching process, and acts on the rotor plate 23 and the oil passing cover 40 to brake the rotating shaft 20 to rotate slowly until the oil passing cover 40 is blocked by the separating ribs 13, and the rotation of the rotor plate 23 and the oil passing cover 40 is stopped, i.e. the damping rotation of the rotating shaft 20 is stopped, thereby realizing.

As shown in fig. 9, 10 and 1, when the toilet needs to be opened upwards, the toilet cover plate drives the rotating shaft 20 and the inner shaft section 22 thereof to rotate counterclockwise, the rotary wing plate 23 and the oil passing cover 40 flex damping oil counterclockwise together, the damping oil reversely passes through the oil passing gap 45 of the oil passing cover 40 to enter the expanding opening 261 and flow to the reducing opening 262, namely, the damping oil washes the valve plate 30 away from the contraction port 262 through the pressure accumulation effect of the oil through hole 26, the valve plate 30 is moved outwards from the step 25 in the rotation direction of the rotating shaft 20 and is limited in the clamping groove 44 by the oil passing cover 40, so that the damping oil can quickly pass through the rotor plate 23 and the oil passing cover 40, the two sides of the rotor plate 23 and the oil passing cover 40 can not be sealed to generate hydraulic pressure, therefore, in the whole process of the toilet lid being opened upwards, the damping oil has no hydraulic damping force on the rotary wing plate 23 and the oil passing cover 40, and does not brake the rotating shaft 20, so that the rotating shaft 20 can rotate rapidly, and people can easily open the toilet lid.

As shown in fig. 1 to 3, the inner side surface of the convex ring 21 of the rotating shaft 20 of the present invention is provided with a reinforcing rib connecting the inner shaft section 22 and the root of the rotor plate 23, so as to greatly improve the connection strength between the rotor plate 23 and the rotating shaft 20 and the capability of resisting oil pressure impact; the valve plate 30 is covered by the oil passing cover 40 fixed on the rotary wing plate 23, so that the valve plate 30, the oil passing cover 40 and the rotary wing plate 23 are assembled into an oil passing one-way valve whole, the valve plate 23, the oil passing cover 40 and the rotary wing plate 23 can be conveniently and simultaneously assembled into the oil cavity 11, the assembly efficiency of the utility model can be greatly improved, and the assembly cost can be reduced; the oil passing hole 26 is arranged on the rotor plate 23, so that the bending strength of the rotor plate 23 can be enhanced, the valve plate 30 is arranged on the step 25 on the side surface of the rotor plate 23, and the rotation amplitude of the rotating shaft 20 can still meet the requirement of the turning angle of the cover plate for opening and closing.

The above embodiments are provided only for the purpose of illustration, not for the limitation of the present invention, and those skilled in the art can make various changes or modifications without departing from the spirit and scope of the present invention, therefore, all equivalent technical solutions should also belong to the scope of the present invention, and are defined by the claims.

Claims

1. The utility model provides an enhancement mode hydraulic pressure rotary damper, contains one axle sleeve (10) that has oil pocket (11) and one with oil pocket (11) sealed rotating flexible oil complex pivot (20), inner shaft section (22) radial symmetry of bulge loop (21) one side on pivot (20) sets up two rotor plate (23) that are used for scratching oil, two of symmetry on oil pocket (11) wall separate muscle (13) and inner shaft section (22) footpath face can conflict the laminating and limit rotor plate (23) rotation range, its characterized in that:

the inner side surface of the convex ring (21) between the rotor wing plates (23) is provided with a reinforcing rib (24) which is connected with the roots of the rotor wing plates (23) and the inner shaft section (22); the spacer ribs (13) are provided with adaptive surfaces (14) which are in close contact and sliding fit with the surfaces of the reinforcing ribs (24);

each rotor wing plate (23) is provided with a step (25) and an oil through hole (26), each step (25) is provided with a valve plate (30) which can move upwards in the rotating direction of the rotor wing plate (23) to open or close the oil through hole (26), and each rotor wing plate (23) is embedded and fixed with an oil passing cover (40) to limit the valve plate (30) on the step (25); the valve plate (30) closes the oil through hole (26) to enable the oil pressure braking rotating shaft (20) generated when the rotary wing plate (23) slowly flexes oil to slowly rotate.

2. An enhanced hydraulic rotary damper according to claim 1, further characterized by: a partition plate (12) which is vertically connected with the spacer rib (13) is arranged in an oil cavity (11) of the shaft sleeve (10), a bearing hole (15) is arranged in the middle of the partition plate (12), and a pivot (28) which is in sleeve fit with the bearing hole (15) is arranged at the end of the inner shaft section (22); the reinforcing rib (24) is in a conical ring shape, and the adapting surface (14) on the separating rib (13) is an inclined surface.

3. An enhanced hydraulic rotary damper according to claim 2, further characterized by: the oil passing cover (40) is provided with an arc-shaped wall (41) which is in abutting sliding fit with the wall of the oil cavity (11), two oil passing walls (42) which are connected with the arc-shaped wall (41) and parallel to clamp the two sides of the rotary wing plate (23), and a limiting wall (43) which is connected with the arc-shaped wall (41) and is connected with the same-direction end of the oil passing wall (42); a clamping groove (44) for nesting the rotary wing plate (23) is formed in a space surrounded by the arc-shaped wall (41), the oil passing wall (42) and the limiting wall (43); the limit wall (43) is in close contact sliding fit with the partition plate (12).

4. An enhanced hydraulic rotary damper according to claim 3, further characterized by: the limiting wall (43) is provided with a concave arc-shaped surface (431), and the tail end part of the rotary wing plate (23) is provided with a convex arc-shaped surface (27) which is positioned and attached to the concave arc-shaped surface (431); two ends of the oil passing wall (42) at one end of the clamping groove (44) are provided with sleeving surfaces (46) attached to the surfaces of the reinforcing ribs (24).

5. An enhanced hydraulic rotary damper according to claim 3, further characterized by: each oil passing wall (42) is also provided with an oil passing notch (45) which is kept normally communicated with the through clamping groove (44).

6. An enhanced hydraulic rotary damper according to claim 1, further characterized by: the oil through hole (26) on the rotor wing plate (23) is a reducing hole, the flaring (261) of the oil through hole (26) is arranged on the surface of the rotor wing plate (23) without the step (25), and the necking (262) of the oil through hole (26) is arranged on the surface of the rotor wing plate (23) with the step (25); the valve plate (30) is separated from or blocks the necking (262) so as to correspondingly open or close the oil through hole (26).

7. An enhanced hydraulic rotary damper according to claim 2, further characterized by: the rotating shaft (20) is also sleeved with a backing ring (50) which is padded outside the convex ring (21), and the rotating shaft (20) is also sleeved with a gland (60) which is pressed against the backing ring (50) and is welded and sealed with the front end of the shaft sleeve (10).

8. An enhanced hydraulic rotary damper according to claim 2, further characterized by: the bearing holes (15) at two sides of each partition rib (13) on the partition plate (12) are provided with throttling ports (16) which can enable damping oil at two sides of the partition rib (13) to be communicated at the rear side of the partition plate (12), and the rear part of the shaft sleeve (10) is provided with an adjusting nut (70) which is used for sealing or adjusting the communicated opening of all the throttling ports (16).

9. An enhanced hydraulic rotary damper according to claim 8, further characterized by: a threaded hole (17) at the rear part of the shaft sleeve (10) is screwed with an adjusting nut (70), and a round hole (18) is arranged between the threaded hole (17) in the shaft sleeve (10) and the partition plate (12); a cylinder (71) on the adjusting nut (70) is inserted into the round hole (18), and a rubber ring (73) on the cylinder (71) is sealed with the round hole (18); the adjustment nut (70) is rotated to enable the cylindrical end surface (72) to be tightly attached to the partition plate (12) to seal the throttling openings (16) or enable the cylindrical end surface (72) to be separated from the partition plate (12) to adjust the opening degree of all the throttling openings (16).