CN213898575U

CN213898575U - Hydraulic buffer door spindle

Info

Publication number: CN213898575U
Application number: CN202022125801.4U
Authority: CN
Inventors: 陈玉山
Original assignee: Guangdong Jinlian'an Technology Co ltd
Current assignee: Guangdong Jinlian'an Technology Co ltd
Priority date: 2020-09-24
Filing date: 2020-09-24
Publication date: 2021-08-06
Anticipated expiration: 2030-09-24

Abstract

The utility model relates to a hydraulic buffer door shaft, it includes the fixed plate, the rotor, stator and dustcoat, be equipped with the uide bushing on the fixed plate, the rotor rotates to be set up on the fixed plate, and be located the uide bushing inboard, stator and rotor screw-thread fit, and with the upper and lower straight line sliding fit of uide bushing, the dustcoat sets up on the fixed plate, and cover uide bushing, rotor and stator, still include damping hydro-cylinder and compression spring, the cylinder body and the uide bushing fixed connection of damping hydro-cylinder, the piston rod and the rotor fixed connection of damping hydro-cylinder, be equipped with compression spring between the interior top surface of stator and dustcoat; the upper end of the damping oil cylinder is provided with a damping force adjusting switch, and the top surface of the outer cover is provided with an opening corresponding to the damping force adjusting switch. This kind of hydraulic buffer door-hinge adopts the combination of damping hydro-cylinder and compression spring to provide the damping effect for the door-hinge, has avoided adopting pneumatics produced installation complicacy, gas leakage scheduling problem, and in addition, the afterbody of damping hydro-cylinder has damping dynamics regulating switch to the realization is adjusted the speed of closing the door.

Description

Hydraulic buffer door spindle

Technical Field

The utility model relates to a door-hinge, especially a hydraulic cushion door-hinge.

Background

Chinese patent No. CN 201620985641.1 discloses in 2017, 4/19, a durable pneumatic floor spring (door shaft), in which the housing includes a fixed plate and a cylindrical barrel fixedly disposed together, the bottom of the cylindrical barrel is provided with an integrated bottom sealing cover, a rotor shaft is rotatably mounted in the cylindrical barrel, an integrated top sealing pad bowl is disposed between the rotor shaft and the housing, the rotor shaft includes an integrated rotor and a rotating shaft, a stator is mounted in the cylindrical barrel in a constrained manner, an integrated supporting sealing sleeve is sleeved in the cylindrical barrel, a hollow piston is sleeved in the integrated supporting sealing sleeve, the piston abuts against the bottom surface of the stator, and a sealed gas chamber is formed between the integrated supporting sealing sleeve, the piston, the housing and the integrated bottom sealing cover; the gas chamber is filled with compressed nitrogen. The rotation reset speed of the floor spring with the improved structure can not be adjusted, and the process requirement is higher because gas leakage needs to be prevented. In addition, due to the external closure, it is difficult to achieve the adjustment of the rotational damping force.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a rational in infrastructure, simple to operate, damping dynamics adjustable hydraulic cushion door-hinge to the regulation of the speed of closing the door is realized.

The purpose of the utility model is realized like this:

a hydraulic buffer door spindle comprises a fixed plate, a rotor, a stator and an outer cover, wherein a guide sleeve is arranged on the fixed plate, the rotor is rotatably arranged on the fixed plate and is positioned on the inner side of the guide sleeve, the stator is in threaded fit with the rotor and is in linear sliding fit with the upper portion and the lower portion of the guide sleeve, the outer cover is arranged on the fixed plate and covers the guide sleeve, the rotor and the stator, the hydraulic buffer door spindle further comprises a damping oil cylinder and a compression spring, a cylinder body of the damping oil cylinder is fixedly connected with the guide sleeve, a piston rod of the damping oil cylinder is fixedly connected with the rotor, and the compression spring is arranged between the stator and the inner top surface of the outer cover; the upper end of the damping oil cylinder is provided with a damping force adjusting switch, and the top surface of the outer cover is provided with an opening corresponding to the damping force adjusting switch.

The purpose of the utility model can also adopt the following technical measures to solve:

as a more specific scheme, the damping oil cylinder comprises an outer cylinder body, a piston rod, a piston assembly and the damping force adjusting switch, an outer cavity, an inner cavity and a tail hole are sequentially arranged between two ends of the outer cylinder body, and the outer cavity, the inner cavity and the tail hole jointly penetrate through two ends of the outer cylinder body; the piston assembly is arranged in the inner cavity in a sliding mode and divides the inner cavity into a first oil storage cavity and a second oil storage cavity, and the first oil storage cavity and the second oil storage cavity are respectively communicated with the outer cavity and the tail hole; one end of the piston rod is connected with the piston assembly, the other end of the piston rod sequentially penetrates through the Y-shaped sealing ring, the compression spring and the sealing meson and then extends out of the outer cylinder body through the port of the outer cavity, the sealing meson abuts against the outer port of the outer cavity, and the periphery and the inner wall of the Y-shaped sealing ring are respectively sealed and in sliding fit with the inner wall of the outer cavity and the periphery of the piston rod; one end of the piston rod facing the tail hole is provided with a speed regulation overflowing hole which is directly or indirectly communicated with the first oil storage cavity and the second oil storage cavity; the damping force adjusting switch is a regulating valve which comprises a needle seat and a speed regulating valve needle, the needle seat is in sealing fit with the tail hole and is in threaded connection with the tail hole, one end of the speed regulating valve needle is connected with the needle seat, and the other end of the speed regulating valve needle points to the speed regulating overflowing hole of the piston rod.

As a more specific another scheme, the damping oil cylinder comprises an outer cylinder body and inner and outer cylinder bodies, the inner cavity of the outer cylinder body is filled with damping oil, and the inner and outer cylinder bodies are arranged in the inner cavity of the outer cylinder body; the piston is arranged in the inner cavity of the inner cylinder body and the inner cavity of the outer cylinder body and divides the inner cavity of the inner cylinder body into a front cavity and a rear cavity, the two cavities are respectively a front cavity and a rear cavity, the piston is provided with a first oil passing channel for communicating the front cavity and the rear cavity, and a one-way valve is arranged in the first oil passing channel; the rear end of the piston rod extends into the inner cylinder body and the outer cylinder body to be connected with the piston, and the front end of the piston rod extends out of the front end of the outer cylinder body; a second oil passing channel is arranged between the outer wall of the inner cylinder body and the outer wall of the outer cylinder body, the front end of the second oil passing channel is communicated with the front cavity, the rear end of the second oil passing channel is communicated with the rear cavity through an oil passing adjusting hole, the oil passing adjusting hole is formed in the rear end of the inner cylinder body and the rear end of the outer cylinder body, the damping force adjusting switch is a damping force adjusting valve, the damping force adjusting valve is in threaded connection with the rear end of the outer cylinder body, a valve needle is arranged on the damping force adjusting valve corresponding to the oil passing adjusting hole, and the flow of the oil passing adjusting hole is adjusted by rotating the damping force adjusting valve so as to adjust the damping force; and a return spring is arranged in the rear cavity of the inner cylinder body and the rear cavity of the outer cylinder body and is in compression joint between the rear end of the piston and the inner end surface of the rear cavity.

As a further scheme, the stator is provided with a center hole, the top surface of the stator is provided with a sleeve, the sleeve is communicated with the center hole, the outer cylinder body of the damping oil cylinder is in threaded connection with the inner wall of the sleeve, the top surface of the rotor is provided with a connecting hole, and the piston rod of the damping oil cylinder is fixedly connected with the connecting hole through a transverse pin or in threaded connection.

As a further scheme, the periphery of the rotor is provided with a spiral groove, the spiral groove comprises two sections of forward spiral grooves and two sections of reverse spiral grooves, and the forward spiral grooves and the reverse spiral grooves are alternately distributed outside the periphery of the rotor and are communicated end to end, so that the spiral grooves are wavy; and a circular hole communicated with the central hole of the stator is formed in the side wall of the stator, a steel ball or a cylindrical pin is arranged in the circular hole, the steel ball or the cylindrical pin protrudes into the central hole, and the steel ball or the cylindrical pin falls into the spiral groove.

As a further scheme, a first positioning groove and a second positioning groove are respectively arranged at the bottom of the wave crest and the bottom of the wave trough of the spiral groove; the steel balls or the cylindrical pins are arranged in two numbers, and the two steel balls or the cylindrical pins are symmetrically distributed on two sides of the central hole.

As a further scheme, the outer wall of the stator is provided with a guide groove along the axis direction, the inner wall of the guide sleeve is provided with a guide convex rib along the axis direction, and the guide convex rib is in linear sliding fit with the guide groove.

As a further scheme, the top surface of the fixing plate is also provided with a sealing bowl pad, the sealing bowl pad and the fixing plate are provided with shaft holes, the lower end of the rotor is provided with a square shaft, the rotor is placed on the sealing bowl pad, and the square shaft penetrates through the shaft holes of the sealing bowl pad and the fixing plate.

As a further scheme, the top surface of the fixing plate is welded with the lower end of the guide sleeve.

As a further scheme, the hydraulic buffer door shaft further comprises a fixed seat, a shaft sleeve is arranged on the top surface of the fixed seat, a square hole is formed in the shaft sleeve, and the lower end of the square shaft is connected with the square hole in an inserting mode.

The utility model has the advantages as follows:

this kind of hydraulic buffer door-hinge adopts the combination of damping hydro-cylinder and compression spring to provide the damping effect for the door-hinge, has avoided adopting pneumatics produced installation complicacy, gas leakage scheduling problem, and in addition, the afterbody of damping hydro-cylinder has damping dynamics regulating switch to the realization is adjusted the speed of closing the door.

Drawings

Fig. 1 is an exploded schematic view of an embodiment of the present invention.

Fig. 2 is another schematic view of an angle structure according to an embodiment of the present invention.

Fig. 3 is the structure schematic diagram of the utility model after assembly.

Fig. 4 is a schematic view of the top view structure of the present invention.

FIG. 5 is a schematic sectional view A-A of FIG. 4.

Fig. 6 is a schematic view of the structure of the middle rotor of the present invention.

Fig. 7 is the schematic view of the decomposition structure of the damping cylinder of the present invention.

Fig. 8 is another schematic view of the angular decomposition structure of the damping cylinder of the present invention.

Fig. 9 is a schematic structural diagram of the piston assembly of the present invention.

Fig. 10 is another angle structure diagram of the piston assembly of the present invention.

Fig. 11 is a schematic view of the piston rod structure of the present invention.

Fig. 12 is a schematic structural view of the regulating valve of the present invention.

Fig. 13 is a schematic structural diagram of the damping cylinder of the present invention.

Fig. 14 is another angle structure diagram of the damping cylinder of the present invention.

Fig. 15 is a schematic view of the front view structure of the damping cylinder of the present invention.

FIG. 16 is a schematic sectional view A-A of FIG. 15.

Fig. 17 is a schematic structural view of the piston assembly in fig. 16 after rotating a certain angle.

Fig. 18 is a cross-sectional structural view of fig. 15 in another working state.

Fig. 19 is a schematic structural view of the piston assembly of fig. 16 after rotating a certain angle.

In the figure:

1 is an outer cover, 11 is an opening, 2 is a compression spring, 3 is a damping oil cylinder, 31 is an outer cylinder body, 311 is a tail hole, 312 is an outer cavity, 313 is an anti-drop flanging, 314 is a first oil storage cavity, 315 is a second oil storage cavity, 316 is a limit step, 32 is a piston rod, 321 is an outer transverse hole, 322 is a rivet joint, 323 is an inner transverse hole, 324 is a speed-regulating overflowing hole, 325 is a bearing platform, 326 is an abdicating hole, 33 is a Y-shaped sealing ring, 34 is a spacer sleeve, 35 is a tower-shaped spring, 36 is a sealing meson, 4 is a stator, 41 is a sleeve, 42 is a round hole, 43 is a guide groove, 44 is a steel ball, 45 is a central hole, 5 is a rotor, 51 is a connecting hole, 52 is a square shaft, 53 is a forward spiral groove, 54 is a first positioning groove, 55 is a reverse spiral groove, 56 is a second positioning groove, 6 is a fixed plate, 61 is a guide sleeve, 62 is a guide convex rib, 63 is a shaft hole, 7 is a fixed seat, 71 is a square hole, 72 is a shaft sleeve, 8 is a piston component, 81 is a piston, 811 is a central overflowing hole, 812 is a drainage groove, 813 is a first overflowing groove, 814 is an annular groove, 815 is a second overflowing groove, 816 is a peripheral overflowing hole, 817 is an inner overflowing groove, 82 is a sealing ring, 83 is a flat meson, 9 is a regulating valve, 91 is a needle seat, 92 is a speed regulating valve needle, 93 is a thin needle section, 94 is a transition conical surface, 95 is a thick needle section, 96 is a threaded section, 97 is an O-shaped sealing ring, and 98 is a tool regulating hole.

Detailed Description

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

In a first embodiment, referring to fig. 1 to 6, a hydraulic buffer door spindle includes a fixed plate 6, a rotor 5, a stator 4, and an outer cover 1, where the fixed plate 6 is provided with a guide sleeve 61, the rotor 5 is rotatably disposed on the fixed plate 6 and located inside the guide sleeve 61, the stator 4 is in threaded fit with the rotor 5 and in up-and-down linear sliding fit with the guide sleeve 61, the outer cover 1 is disposed on the fixed plate 6 and covers the guide sleeve 61, the rotor 5 and the stator 4, the hydraulic buffer door spindle further includes a damping cylinder 3 and a compression spring 2, a cylinder body of the damping cylinder 3 is fixedly connected with the guide sleeve 61, a piston rod 32 of the damping cylinder 3 is fixedly connected with the rotor 5, and the compression spring 2 is disposed between the stator 4 and an inner top surface of the outer cover 1; the upper end of the damping oil cylinder 3 is provided with a damping force adjusting switch, and the top surface of the outer cover 1 is provided with an opening 11 corresponding to the damping force adjusting switch.

Stator 4 is equipped with centre bore 45, and stator 4 top surface is equipped with sleeve 41, sleeve 41 and centre bore 45 intercommunication, the outer cylinder body 31 of damping cylinder 3 and the inner wall threaded connection of sleeve 41, the top surface of rotor 5 is equipped with connecting hole 51, the piston rod 32 of damping cylinder 3 is fixed through horizontal round pin fixed connection or threaded connection with connecting hole 51.

The periphery of the rotor 5 is provided with a spiral groove, the spiral groove comprises two sections of forward spiral grooves 53 and two sections of reverse spiral grooves 55, and the forward spiral grooves 53 and the reverse spiral grooves 55 are alternately distributed outside the periphery of the rotor 5 and are communicated end to end, so that the spiral grooves are wavy; the side wall of the stator 4 is provided with a round hole 42 communicated with a central hole 45 thereof, a steel ball 44 is arranged in the round hole 42, the steel ball 44 protrudes into the central hole 45, and the steel ball 44 falls into the spiral groove.

The bottom of the wave crest and the bottom of the wave trough of the spiral groove are respectively provided with a first positioning groove 54 and a second positioning groove 56; the steel balls 44 are provided with two steel balls 44, and the two steel balls 44 are symmetrically distributed on two sides of the central hole 45.

The outer wall of the stator 4 is provided with a guide groove 43 along the axial direction thereof, the inner wall of the guide sleeve 61 is provided with a guide convex rib 62 along the axial direction thereof, and the guide convex rib 62 is in linear sliding fit with the guide groove 43.

The fixed plate 6 is provided with a shaft hole 63, and the lower end of the rotor 5 is provided with a square shaft 52, the square shaft 52 and the shaft hole 63 of the fixed plate 6.

The top surface of the fixed plate 6 is welded with the lower end of the guide sleeve 61.

The hydraulic buffer door shaft further comprises a fixed seat 7, a shaft sleeve 72 is arranged on the top surface of the fixed seat 7, a square hole 71 is arranged in the shaft sleeve 72, and the lower end of the square shaft 52 is connected with the square hole 71 in an inserting mode.

Referring to fig. 7 to 19, the damping cylinder 3 includes an outer cylinder 31, a piston rod 32, a piston assembly 8 and the damping force adjusting switch, an outer cavity 312, an inner cavity and a tail hole 311 are sequentially disposed between two ends of the outer cylinder 31, and the outer cavity 312, the inner cavity and the tail hole 311 jointly penetrate through two ends of the outer cylinder 31; the piston assembly 8 is arranged in the inner cavity in a sliding mode and divides the inner cavity into a first oil storage cavity 314 and a second oil storage cavity 315, and the first oil storage cavity 314 and the second oil storage cavity 315 are respectively communicated with the outer cavity 312 and the tail hole 311; one end of the piston rod 32 is connected with the piston assembly 8, the other end of the piston rod passes through the Y-shaped sealing ring 33, the compression spring 2 and the sealing medium 36 in sequence and then extends out of the outer cylinder body 31 through the port of the outer cavity 312, the sealing medium 36 abuts against the outer port of the outer cavity 312, and the periphery and the inner wall of the Y-shaped sealing ring 33 are respectively sealed and in sliding fit with the inner wall of the outer cavity 312 and the periphery of the piston rod 32; the end of the piston rod 32 facing the tail hole 311 is provided with a speed regulation overflowing hole 324, and the speed regulation overflowing hole 324 is directly or indirectly communicated with the first oil storage cavity 314 and the second oil storage cavity 315; the damping force adjusting switch is an adjusting valve 9, the adjusting valve 9 comprises a needle seat 91 and a speed regulating valve needle 92, the needle seat 91 is in sealing fit and in threaded connection with the tail hole 311, one end of the speed regulating valve needle 92 is connected with the needle seat 91, and the other end of the speed regulating valve needle 92 points to the speed regulating overflowing hole 324 of the piston rod 32. The inner cavity is filled with damping oil, not shown in the figure.

The speed regulation valve needle 92 comprises a thin needle section 93 and a thick needle section 95, the thin needle section 93 is connected between the thick needle section 95 and the needle seat 91, and the inner diameter of the speed regulation overflowing hole 324 of the piston rod 32 is larger than the outer diameter of the thick needle section 95. The fine needle section 93 and the coarse needle section 95 of the speed regulating valve needle 92 are connected through a transition conical surface 94; the needle seat 91 comprises a sealing section and a thread section 96 from outside to inside, an O-shaped sealing ring 97 is arranged on the periphery of the sealing section, and a tool adjusting hole 98 is arranged on the outer end face of the sealing section.

The periphery of the piston rod 32 is provided with an inner transverse hole 323 communicated with the speed regulation overflowing hole 324, the inner transverse hole 323 is also provided with a yielding hole 326 opposite to the regulation overflowing hole, and the inner diameter of the yielding hole 326 is larger than the outer diameter of the thick needle section 95.

The piston assembly 8 comprises a piston 81 and a sealing ring 82, a central overflowing hole 811 is formed in the center of the piston 81, and the central overflowing hole 811 is sleeved outside the piston rod 32 and surrounds the inner transverse hole 323; the periphery of the piston 81 is provided with an annular groove 814, the sealing ring 82 is arranged in the annular groove 814, the thickness of the sealing ring 82 is smaller than the width of the annular groove 814, the inner annular surface of the sealing ring 82 is contacted with the circumferential surface of the annular groove 814, and the outer annular surface of the sealing ring 82 is contacted with the inner wall of the inner cavity; the end surface of the piston 81 facing the outer cavity 312 is provided with a drainage groove 812, and the drainage groove 812 leads to a central overflowing hole 811 and the periphery of the piston 81; the end of the piston 81 facing the tail hole 311 is provided with four peripheral overflowing holes 816 corresponding to the periphery of the central overflowing hole 811, the peripheral overflowing holes 816 lead into the annular groove 814, and the circumferential surface of the annular groove 814 is provided with an inner overflowing groove 817 communicated with the peripheral overflowing holes 816.

Two ends of the outer periphery of the piston 81 are respectively provided with four first overflowing grooves 813 and four second overflowing grooves 815, the first overflowing grooves 813 and the second overflowing grooves 815 are respectively communicated with the annular groove 814, the first overflowing grooves 813 lead to the end face, facing the outer cavity 312, of the piston 81, the drainage grooves 812 point in the radial direction, and two drainage grooves 812 are respectively communicated with one first overflowing groove 813; the second overflow groove 815 opens to the end face of the piston 81 facing the tail hole 311.

A riveting head 322 is arranged at one end of the piston rod 32 facing the tail hole 311, the outer diameter of the riveting head 322 is smaller than that of the piston rod 32, a bearing platform 325 is formed at the periphery of the joint of the piston rod 32 and the riveting head 322, the inner transverse hole 323 is positioned at the periphery of the riveting head 322, and the speed-regulating overflowing hole 324 is positioned at the end surface of the riveting head 322; the piston 81 is sleeved outside the rivet head 322 through a central overflowing hole 811.

A flat meson 83 is arranged between the piston 81 and the bearing platform 325, the flat meson 83 is sleeved outside the rivet joint 322, and the outer diameter of the flat meson 83 is larger than that of the piston rod 32.

The inner diameter of the outer cavity 312 of the outer cylinder body 31 is larger than that of the inner cavity, a limit step 316 is arranged between the outer cavity 312 and the inner cavity, and the Y-shaped sealing ring 33 is blocked with the limit step 316; the sealing medium 36 is positioned at the inner side of the outer cavity 312, an anti-falling flange 313 is inwards arranged at the port of the outer cavity 312, and the sealing medium 36 is abutted against the inner surface of the anti-falling flange 313. A spacer bush 34 is further arranged between the tower-shaped spring 35 and the Y-shaped sealing ring 33, the spacer bush 34 is sleeved outside the piston rod 32, the spacer bush 34 is composed of a bottom plate and a surrounding plate, and the surrounding plate is arranged on the periphery of the top surface of the bottom plate; the tower-shaped spring 35 is a tower-shaped spring, the narrow end of the tower-shaped spring is abutted against the sealing meson 36, and the wide end of the tower-shaped spring 35 is abutted against the bottom plate of the spacer 34.

The outer end of the piston rod 32 is provided with an outer transverse hole 321. The damping oil cylinder can be applied to the door hinge.

The working principle of the damping oil cylinder is as follows: referring to fig. 16, when the piston rod 32 pushes the piston assembly 8 to move towards the tail hole 311, as indicated by arrow D in fig. 16, the damping oil in the second oil storage chamber 315 in the inner chamber sequentially enters the first oil storage chamber 314 from the speed regulation through hole 324, the inner cross hole 323, the central through hole 811 and the drainage groove 812 in the direction of arrow a in fig. 16, and in addition, the sealing ring 82 moves towards the opposite direction of the piston rod 32 under the action of oil pressure to block the communication between the inner through hole 817 and the first oil storage chamber 314, as shown in fig. 17, so that a damping and buffering effect is achieved. When the first oil chamber 314 cannot meet the volume increase change caused by the movement of the piston assembly 8 toward the second oil chamber 315, the damping oil in the first oil chamber 314 pushes the Y-shaped sealing ring 33 to move outward as shown by the arrow T in fig. 17, thereby achieving another damping and buffering effect. When the hinge is applied to a door hinge, when the door is closed to a certain angle, such as 90 degrees to 80 degrees, by the action of external force, the hinge rotating shaft changes the rotating motion into axial linear motion through the screw converter and acts on the piston rod 32.

In addition, the speed-regulating overflowing hole 324 is firstly matched with the thick needle section 95, and the gap between the speed-regulating overflowing hole 324 and the thick needle section 95 is small at the moment, so that the oil passing speed is slow, and the door closing speed is also relatively slow; however, when the speed-regulating overflow hole 324 enters the outside of the fine needle section 93, the gap between the speed-regulating overflow hole 324 and the fine needle section 93 is large, so that the oil passing speed is high, and the door closing speed is relatively increased. Therefore, by rotating the regulating valve 9, the timing of the engagement of the speed-regulating overflowing hole 324 with the fine needle section 93 can be changed, thereby changing the speed of closing the door, i.e., changing the buffer speed.

Referring to fig. 18, when the piston rod 32 drives the piston assembly 8 to move outwards, as shown by the arrow U in fig. 18 and 19, the damping oil in the first oil storage chamber 314 in the inner chamber sequentially enters the second oil storage chamber 315 through the flow guide groove 812, the central overflowing hole 811, the inner cross hole 323 and the speed regulation overflowing hole 324 in the direction of the arrow b in fig. 18, and the damping oil in the first oil storage chamber 314 further sequentially enters the second oil storage chamber 315 through the first overflowing groove 813, the annular groove 814, the inner overflowing groove 817 and the peripheral overflowing hole 816 in the direction of the arrow c in fig. 19; meanwhile, the Y-shaped sealing ring 33 moves in the direction of the first oil storage cavity 314 under the action of the tower-shaped spring 35 as shown by an arrow F in fig. 18 until the Y-shaped sealing ring 33 abuts against the limiting step 316 to accelerate the damping oil to enter the second oil storage cavity 315, so that when the stress is understood by opening the door, the door is opened without damping force or with less damping force due to most of oil passing channels being opened, and the door is opened more smoothly.

The working principle of the floor spring is as follows: when the fixed plate and the guide sleeve rotate relative to the fixed seat, the steel balls roll in the spiral groove, the stator linearly moves upwards or downwards, when the stator moves upwards, the stator pushes the compression spring to compress and move, energy storage is realized, meanwhile, the piston rod is in an extending state (an oil passing channel of damping oil in the damping oil cylinder is smooth when the piston rod extends out, damping is small), when the steel balls roll to the first positioning groove at the bottom of the wave crest of the spiral groove, the fixed plate and the guide sleeve are stopped, and the door opening state can be understood; the fixed plate and the guide sleeve continue to exert force and rotate relative to the rotor, the steel balls are separated from the first positioning groove, the external force can be cancelled at the moment, the elastic force of the compression spring is released, automatic door closing is realized, meanwhile, in the door closing process, the piston rod retracts, an oil passing channel in the damping oil cylinder becomes narrow and small, the oil passing resistance is large, and therefore buffering is formed, and door closing buffering is realized. When the speed of closing the door needs to be adjusted, can change the flow of oil passing channel when the piston rod retracts through adjusting the damping force adjusting switch, realize the regulation of the speed of closing the door promptly.

The second embodiment is different from the first embodiment in that: the damping oil cylinder comprises an outer cylinder body and inner and outer cylinder bodies, damping oil is filled in the inner cavity of the outer cylinder body, and the inner and outer cylinder bodies are arranged in the inner cavity of the outer cylinder body; the piston is arranged in the inner cavity of the inner cylinder body and the inner cavity of the outer cylinder body and divides the inner cavity of the inner cylinder body into a front cavity and a rear cavity, the two cavities are respectively a front cavity and a rear cavity, the piston is provided with a first oil passing channel for communicating the front cavity and the rear cavity, and a one-way valve is arranged in the first oil passing channel; the rear end of the piston rod extends into the inner cylinder body and the outer cylinder body to be connected with the piston, and the front end of the piston rod extends out of the front end of the outer cylinder body; a second oil passing channel is arranged between the outer wall of the inner cylinder body and the outer wall of the outer cylinder body, the front end of the second oil passing channel is communicated with the front cavity, the rear end of the second oil passing channel is communicated with the rear cavity through an oil passing adjusting hole, the oil passing adjusting hole is formed in the rear end of the inner cylinder body and the rear end of the outer cylinder body, the damping force adjusting switch is a damping force adjusting valve, the damping force adjusting valve is in threaded connection with the rear end of the outer cylinder body, a valve needle is arranged on the damping force adjusting valve corresponding to the oil passing adjusting hole, and the flow of the oil passing adjusting hole is adjusted by rotating the damping force adjusting valve so as to adjust the damping force; and a return spring is arranged in the rear cavity of the inner cylinder body and the rear cavity of the outer cylinder body and is in compression joint between the rear end of the piston and the inner end surface of the rear cavity.

The damping oil cylinder belongs to the prior art, and the specific structure of the damping oil cylinder can be seen in the following patent documents: patent publication No. CN210978338U, published 2020.07.10, entitled damping cylinder.

Claims

1. The utility model provides a hydraulic buffer door shaft, including fixed plate (6), rotor (5), stator (4) and dustcoat (1), be equipped with uide bushing (61) on fixed plate (6), rotor (5) rotate to set up on fixed plate (6), and be located uide bushing (61) inboard, stator (4) and rotor (5) screw-thread fit, and with uide bushing (61) straight line sliding fit from top to bottom, dustcoat (1) sets up on fixed plate (6), and cover uide bushing (61), rotor (5) and stator (4), its characterized in that: the damping device is characterized by further comprising a damping oil cylinder (3) and a compression spring (2), wherein a cylinder body of the damping oil cylinder (3) is fixedly connected with the guide sleeve (61), a piston rod (32) of the damping oil cylinder (3) is fixedly connected with the rotor (5), and the compression spring (2) is arranged between the stator (4) and the inner top surface of the outer cover (1); the upper end of the damping oil cylinder (3) is provided with a damping force adjusting switch, and the top surface of the outer cover (1) is provided with a hole (11) corresponding to the damping force adjusting switch.

2. The hydraulic buffer door spindle according to claim 1, characterized in that: the damping oil cylinder (3) comprises an outer cylinder body (31), a piston rod (32), a piston assembly (8) and a damping force adjusting switch, an outer cavity (312), an inner cavity and a tail hole (311) are sequentially arranged between two ends of the outer cylinder body (31), and the outer cavity (312), the inner cavity and the tail hole (311) jointly penetrate through two ends of the outer cylinder body (31); the piston assembly (8) is arranged in the inner cavity in a sliding mode and divides the inner cavity into a first oil storage cavity (314) and a second oil storage cavity (315), and the first oil storage cavity (314) and the second oil storage cavity (315) are respectively communicated with the outer cavity (312) and the tail hole (311); one end of the piston rod (32) is connected with the piston assembly (8), the other end of the piston rod sequentially penetrates through the Y-shaped sealing ring (33), the compression spring (2) and the sealing meson (36) and then extends out of the outer cylinder body (31) through the port of the outer cavity (312), the sealing meson (36) is abutted against the outer port of the outer cavity (312), and the periphery and the inner wall of the Y-shaped sealing ring (33) are respectively sealed and in sliding fit with the inner wall of the outer cavity (312) and the periphery of the piston rod (32); one end of the piston rod (32) facing the tail hole (311) is provided with a speed regulation overflowing hole (324), and the speed regulation overflowing hole (324) is directly or indirectly communicated with the first oil storage cavity (314) and the second oil storage cavity (315); damping dynamics regulating switch is governing valve (9), and governing valve (9) include needle file (91) and speed governing needle (92), and needle file (91) and tail-hole (311) seal fit and threaded connection, and the one end and the needle file (91) of speed governing needle (92) are connected, and the discharge orifice (324) are crossed in the speed governing of the directional piston rod (32) of the other end of speed governing needle (92).

3. The hydraulic buffer door spindle according to claim 1, characterized in that: the damping oil cylinder comprises an outer cylinder body and inner and outer cylinder bodies, damping oil is filled in the inner cavity of the outer cylinder body, and the inner and outer cylinder bodies are arranged in the inner cavity of the outer cylinder body; the piston is arranged in the inner cavity of the inner cylinder body and the inner cavity of the outer cylinder body and divides the inner cavity of the inner cylinder body into a front cavity and a rear cavity, the two cavities are respectively a front cavity and a rear cavity, the piston is provided with a first oil passing channel for communicating the front cavity and the rear cavity, and a one-way valve is arranged in the first oil passing channel; the rear end of the piston rod extends into the inner cylinder body and the outer cylinder body to be connected with the piston, and the front end of the piston rod extends out of the front end of the outer cylinder body; a second oil passing channel is arranged between the outer wall of the inner cylinder body and the outer wall of the outer cylinder body, the front end of the second oil passing channel is communicated with the front cavity, the rear end of the second oil passing channel is communicated with the rear cavity through an oil passing adjusting hole, the oil passing adjusting hole is formed in the rear end of the inner cylinder body and the rear end of the outer cylinder body, the damping force adjusting switch is a damping force adjusting valve, the damping force adjusting valve is in threaded connection with the rear end of the outer cylinder body, a valve needle is arranged on the damping force adjusting valve corresponding to the oil passing adjusting hole, and the flow of the oil passing adjusting hole is adjusted by rotating the damping force adjusting valve so as to adjust the damping force; and a return spring is arranged in the rear cavity of the inner cylinder body and the rear cavity of the outer cylinder body and is in compression joint between the rear end of the piston and the inner end surface of the rear cavity.

4. The hydraulic buffer door spindle according to claim 2 or 3, characterized in that: stator (4) are equipped with centre bore (45), and stator (4) top surface is equipped with sleeve (41), sleeve (41) and centre bore (45) intercommunication, the outer cylinder body (31) of damping hydro-cylinder (3) and the inner wall threaded connection of sleeve (41), the top surface of rotor (5) is equipped with connecting hole (51), piston rod (32) and connecting hole (51) of damping hydro-cylinder (3) are fixed through horizontal pin fixed connection or threaded connection.

5. The hydraulic buffer door spindle according to claim 1, characterized in that: the periphery of the rotor (5) is provided with a spiral groove, the spiral groove comprises two sections of forward spiral grooves (53) and two sections of reverse spiral grooves (55), and the forward spiral grooves (53) and the reverse spiral grooves (55) are alternately distributed outside one circle of the rotor (5) and are communicated end to end, so that the spiral grooves are wavy; the side wall of the stator (4) is provided with a round hole (42) communicated with a central hole (45) of the stator, a steel ball (44) or a cylindrical pin is arranged in the round hole (42), the steel ball (44) or the cylindrical pin protrudes into the central hole (45), and the steel ball (44) or the cylindrical pin falls into the spiral groove.

6. The hydraulic buffer door spindle according to claim 5, wherein: a first positioning groove (54) and a second positioning groove (56) are respectively arranged at the bottom of the wave crest and the bottom of the wave trough of the spiral groove; two steel balls (44) or cylindrical pins are arranged, and the two steel balls (44) or cylindrical pins are symmetrically distributed on two sides of the central hole (45).

7. The hydraulic buffer door spindle according to claim 1, characterized in that: the outer wall of stator (4) is equipped with guide way (43) along its axis direction, the inner wall of uide bushing (61) is equipped with direction protruding muscle (62) along its axis direction, and direction protruding muscle (62) and guide way (43) straight line sliding fit.

8. The hydraulic buffer door spindle according to claim 1, characterized in that: fixed plate (6) top surface still is equipped with sealed bowl and fills up, and sealed bowl fills up and fixed plate (6) are equipped with shaft hole (63), the lower extreme of rotor (5) is equipped with square shaft (52), and rotor (5) hold and put on sealed bowl pad, and shaft hole (63) that sealed bowl filled up and fixed plate (6) are passed in square shaft (52).

9. The hydraulic buffer door spindle according to claim 1, characterized in that: the top surface of the fixed plate (6) is welded with the lower end of the guide sleeve (61).

10. The hydraulic buffer door spindle according to claim 8, wherein: the novel bearing is characterized by further comprising a fixed seat (7), wherein a shaft sleeve (72) is arranged on the top surface of the fixed seat (7), a square hole (71) is formed in the shaft sleeve (72), and the lower end of the square shaft (52) is connected with the square hole (71) in an inserting mode.