CN116608235A - Nitrogen damper pillar assembly and vehicle assembly - Google Patents
Nitrogen damper pillar assembly and vehicle assembly Download PDFInfo
- Publication number
- CN116608235A CN116608235A CN202310861570.9A CN202310861570A CN116608235A CN 116608235 A CN116608235 A CN 116608235A CN 202310861570 A CN202310861570 A CN 202310861570A CN 116608235 A CN116608235 A CN 116608235A
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- China
- Prior art keywords
- valve
- compression
- recovery
- nitrogen
- end cover
- Prior art date
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 112
- 229910052757 nitrogen Inorganic materials 0.000 title claims description 54
- 238000007906 compression Methods 0.000 claims abstract description 136
- 230000006835 compression Effects 0.000 claims abstract description 131
- 238000011084 recovery Methods 0.000 claims abstract description 95
- 238000013016 damping Methods 0.000 claims abstract description 50
- 230000035939 shock Effects 0.000 claims abstract description 39
- 239000006096 absorbing agent Substances 0.000 claims abstract description 37
- 230000003139 buffering effect Effects 0.000 claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 10
- 229910001873 dinitrogen Inorganic materials 0.000 claims abstract description 5
- 229920002635 polyurethane Polymers 0.000 claims description 36
- 239000004814 polyurethane Substances 0.000 claims description 36
- 238000007789 sealing Methods 0.000 claims description 26
- 238000007667 floating Methods 0.000 claims description 12
- 239000000725 suspension Substances 0.000 claims description 8
- 238000002955 isolation Methods 0.000 claims description 6
- 239000000428 dust Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 230000009471 action Effects 0.000 description 6
- 230000004888 barrier function Effects 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F13/00—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs
- F16F13/002—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising at least one fluid spring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
- F16F9/062—Bi-tubular units
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3207—Constructional features
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/34—Special valve constructions; Shape or construction of throttling passages
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/36—Special sealings, including sealings or guides for piston-rods
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/50—Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics
Abstract
The piston rod is sleeved in the oil cylinder, a second recovery valve and a second compression valve are additionally arranged at the upper part and the lower part of a piston valve system in the piston rod and are matched with recovery cavities and compression cavities at the top and the bottom of an inner cavity of the oil cylinder, and as the second recovery valve and the second compression valve keep a gap with the inner wall of the oil cylinder, a valve body is additionally arranged to prevent the buffer effect from being exerted in the middle stroke; when the piston rod moves to the tail end travel of the top and the bottom, the conical surface of the additionally arranged valve body can be just mutually attached to the conical groove of the end cover, so that the edge oil path is closed, and the tail end of the travel plays a role in buffering and damping. Through this design mode, nitrogen gas shock absorber is less at its damping force of middle section stroke, exceeds the damping force increase of this middle section stroke, can be according to the vehicle about the different road surface vibration amplitude automatic variation shock absorber oil liquid damping force's size to this satisfies the traveling demand on various different grade type road surfaces simultaneously, improves nitrogen gas shock absorber's suitability and convenience.
Description
Technical Field
The invention belongs to the technical field of automobile shock absorber manufacturing, and particularly relates to a nitrogen shock absorber strut assembly and a vehicle assembly.
Background
The nitrogen shock absorber provides working pressure by nitrogen, provides good shock absorbing capability for a vehicle body by utilizing the performance of strong adaptability and easy automatic adjustment of the nitrogen, and is widely applied to various off-road or racing vehicle types.
When the nitrogen shock absorber is applied to professional off-road events in the present stage, the design matching of the nitrogen shock absorber mainly emphasizes the vehicle operability and ensures the driving safety of extreme road conditions. In recent years, with the increase of civil off-road players, the requirements on the driving quality of vehicles are higher and higher, however, the nitrogen gas shock absorbers existing on the market at present cannot be switched into corresponding oil damping forces according to different vibration amplitudes, and the vehicle body generates different vibration amplitudes on different roads due to the rugged off-road conditions, so that if the vibration damping forces with large amplitudes are the same as small amplitudes, the operation stability is greatly hindered. The invention adopts the design of a traditional nitrogen shock absorber, the external nitrogen gas cylinder is used for limiting the suspension to the external rubber limiting block of the shock absorber, and the suspension is used for limiting the suspension to the internal rubber limiting block of the shock absorber, so that the foaming problem of the traditional oil-gas hybrid shock absorber can be solved, and the control stability on the extremely off-road surface is ensured. However, the design has poor buffering performance, particularly at the end of the stroke of suspension run-out, strong impact sense and poor driving comfort; meanwhile, the compression damping force regulating valve designed by the invention can only mechanically regulate the compression damping, and can be manually regulated according to different road conditions, so that the convenience is poor, the damping regulating amplitude is limited, and if the damping force is regulated to a larger level, the travelling comfort on urban paved roads is poor; and the damping force is adjusted to a small level, so that when the damping force meets the extremely off-road surface with large steep difference, the buffering capacity of the jumping end is insufficient, and the sufficient support and the control stability cannot be obtained. Therefore, the conventional nitrogen shock absorber is difficult to simultaneously meet the driving requirements of various different types of road surfaces, has insufficient applicability and convenience, and needs a new technical scheme for improvement.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the nitrogen shock absorber pillar assembly and the vehicle assembly, which can automatically change the magnitude of the oil damping force of the shock absorber according to the up-down vibration amplitude of the vehicle on different roads, reduce the impact sense at the tail end of a stroke, ensure the travelling comfort of the vehicle on paved roads and the control stability of the vehicle on off-road roads, simultaneously meet the travelling requirements of various different types of roads, and improve the applicability and convenience of the nitrogen shock absorber.
The invention is implemented by the following technical scheme: the nitrogen shock absorber strut assembly comprises a piston rod, wherein one section of the piston rod is sleeved in an oil cylinder through a guide device assembly, the inner cavity of the oil cylinder is filled with oil liquid, and a nitrogen cylinder is arranged beside the oil cylinder; the piston rod is arranged in the oil cylinder, a piston valve system is sleeved on the rod body, the outer edge of the piston valve system is in sealing fit with the inner wall of the oil cylinder, the piston valve system comprises a first compression valve and a first recovery valve, the first compression valve and the first recovery valve are connected in a jogged mode from top to bottom, the first compression valve is provided with a buffering damping structure aiming at downward movement, and the first recovery valve is provided with a buffering damping structure aiming at upward movement;
a second recovery valve is arranged above the piston valve system at intervals, a second compression valve is arranged below the piston valve system at intervals, the second recovery valve and the second compression valve are sleeved and fixed on the piston rod, the edges of the second recovery valve and the second compression valve keep a gap with the inner wall of the oil cylinder, and valve holes penetrating and distributed along the axis of the valve body are arranged on the second recovery valve and the second compression valve; the lower end of the second compression valve is provided with a conical surface, and the upper end surface of the second compression valve is provided with a valve plate covering the valve hole; the upper end of the second recovery valve is provided with a conical surface, and the lower end surface of the second recovery valve is provided with a valve plate covering the valve hole of the second recovery valve in a fitting manner;
the top and the bottom of the inner cavity of the oil cylinder are respectively provided with a restoring cavity and a compressing cavity, the restoring cavity is internally provided with a restoring return spring and a restoring end cover connected below the restoring return spring, the compressing cavity is internally provided with a compressing return spring and a compressing end cover connected above the compressing return spring, and the outer edges of the restoring end cover and the compressing end cover are in sealing fit with the inner wall of the oil cylinder; the recovery end cover is positioned above the second recovery valve, and the compression end cover is positioned below the second compression valve; the lower end face of the recovery end cover and the upper end face of the compression end cover are both provided with concave conical grooves, the conical grooves of the recovery end cover are matched with the conical surfaces of the second recovery valve, and the conical grooves of the compression end cover are matched with the conical surfaces of the second compression valve.
Further, the first compression valve and the first recovery valve are all provided with valve holes distributed along the axis of the valve body, the upper end face of the first compression valve is provided with a valve plate covering the valve holes, and the lower end face of the first recovery valve is provided with a valve plate covering the valve holes.
Further, when the second recovery valve is attached to the recovery end cover, a gap is kept between the conical bottom edge of the conical surface of the second recovery valve and the inner wall of the conical groove of the recovery end cover;
when the second compression valve is attached to the compression end cover, a gap is kept between the conical bottom edge of the conical surface of the second compression valve and the inner wall of the conical groove of the compression end cover;
the edge of the restoration end cover and the edge of the compression end cover are provided with serrated sawtooth grooves, each serrated groove is embedded with a serrated sealing ring matched with the serrated sealing ring in shape, and the serrated sealing rings are attached to the inner wall of the oil cylinder.
Further, a buffer assembly is sleeved on the top rod body of the piston rod, the buffer assembly comprises a polyurethane main body, a buffer seat and a polyurethane top body, the polyurethane main body and the polyurethane top body above the buffer assembly are integrally connected through a cylindrical connector, the buffer seat is sleeved on the periphery of the connector, the polyurethane main body is sleeved on the lower section of the piston rod to form a sleeve gap, and the section of the side wall of the lower section of the polyurethane main body is a zigzag side wall;
the buffer assembly comprises a dustproof pipe, the dustproof pipe is a corrugated pipe body, the buffer seat is in sealing connection with the upper end face of the dustproof pipe, the lower end face of the dustproof pipe is fixed on a spring tray, and the spring tray is sleeved and fixed on the outer wall face of the oil cylinder;
the polyurethane main body is positioned in the dust cover, a spring top seat is supported on the upper surface of the polyurethane top body, an upper support is fixedly arranged on the upper surface of the spring top seat, and a bolt hole or a bolt pair matched with the frame is arranged on the upper support;
the upper support top laminating is equipped with lock nut, lock nut is screwed and is fixed in on the screw thread face at piston rod top, the top cover of piston rod top cover is equipped with, the upper end cover is aimed at the screw thread face at piston rod top covers.
Further, a compression spring is fixedly arranged between the spring top seat and the spring tray, and the compression spring is sleeved on the outer edge of the dustproof pipe.
Further, a spring lower cushion is arranged above the spring tray, a convex wrapping edge is arranged at the edge of the spring lower cushion, and the outer wall of the compression spring is embedded into the wrapping edge; the bottom surface of the spring lower pad is provided with a lug which is embedded into a concave hole of the spring tray; the middle part of the spring lower cushion is sunken to form a special-shaped groove, so that the wall thickness of the middle part of the spring lower cushion is uniform.
Further, an isolation sleeve is sleeved on the outer wall of the rod body of the piston rod, and the upper end and the lower end of the isolation sleeve respectively prop against the piston valve system and the second compression valve;
the compression return spring is supported on a compression lower end pad, and the compression lower end pad is fixedly supported through a lower end boss protruding from the inner wall of the oil cylinder;
further, the guide component is an oil seal guide, the upper end of the guide component is fixedly sleeved with a supporting cover, and the supporting cover covers the upper opening of the oil cylinder; the guide assembly is fixedly supported through the boss at the upper end of the protrusion of the inner wall of the oil cylinder.
Further, the inner cavity of the nitrogen cylinder is divided into an upper cavity and a lower cavity by a floating piston, and nitrogen is filled in the upper cavity above the floating piston; the lower cavity below the floating piston is communicated with the inner cavity of the oil cylinder through a normal through hole of the side wall.
Further, the invention also provides a nitrogen damper vehicle assembly, which comprises the nitrogen damper pillar assembly, wherein the top of the pillar assembly supports the frame of the vehicle assembly, and the bottom of the pillar assembly is arranged on the suspension of the vehicle assembly.
The beneficial effects of the invention are as follows: the piston valve in the piston rod is provided with a second recovery valve and a second compression valve structure which are additionally arranged at the upper part and the lower part of the piston valve system, so that the piston valve is matched with a recovery cavity and a compression cavity which are respectively arranged at the stroke ends of the top and the bottom of the inner cavity of the oil cylinder; when the piston rod moves to the end strokes of the top and the bottom, the conical surfaces of the additionally arranged second recovery valve/second compression valve can be just matched with the conical grooves of the recovery end cover/compression end cover in the recovery cavity/compression cavity, so that the edge oil path is closed, oil can only circulate from the valve hole in the valve body, and the second recovery valve and the second compression valve can respectively play a role of buffering and damping at the stroke ends of the top and the bottom of the piston rod. Through the design mode, when the vehicle runs on the urban pavement, the nitrogen shock absorber works in a sensitive area of the middle-section travel, the damping force is smaller, and the driving comfort is good; when the vehicle runs on the off-road surface, the nitrogen shock absorber works beyond the sensitive area of the middle-stage travel, and the valve body is additionally arranged to start to play a role, so that the shock absorption damping force of the nitrogen shock absorber is increased, and the vehicle can be ensured to obtain good support and control stability on the off-road surface. Therefore, the strut assembly can automatically change the magnitude of the oil-liquid damping force of the shock absorber according to the up-down vibration amplitude of the vehicle on different roads, effectively reduce the impact feeling at the end of a stroke, and simultaneously ensure the travelling comfort of the vehicle on paved roads and the operation stability of the vehicle on off-road roads, thereby simultaneously meeting the travelling requirements of various different types of roads and improving the applicability and convenience of the nitrogen shock absorber.
Drawings
FIG. 1 is a schematic perspective view of a nitrogen damper strut assembly in accordance with one embodiment of the present invention;
FIG. 2 is an exploded view of a nitrogen damper strut assembly in accordance with one embodiment of the present invention;
FIG. 3 is a cross-sectional view of a nitrogen damper strut assembly in accordance with one embodiment of the present invention;
FIG. 4 is an exploded view of a piston rod assembly system according to an embodiment of the present invention;
FIG. 5 is a cross-sectional view of a cushioning assembly according to an embodiment of the present invention;
FIG. 6 is an exploded view of a spring under-pad according to one embodiment of the present invention;
FIG. 7 is a front view of a piston valve train according to an embodiment of the present invention;
FIG. 8 is a cross-sectional view A-A of FIG. 7;
FIG. 9 is a cross-sectional view B-B of FIG. 7;
FIG. 10 is a cross-sectional view of a second recovery valve according to an embodiment of the present invention;
FIG. 11 is a cross-sectional view of a reconstituted end cap in accordance with an embodiment of the invention;
FIG. 12 is a schematic view of the operation of the piston rod at the bottom end stroke in an embodiment of the present invention;
fig. 13 is a schematic view of the operation of the piston rod at the top end stroke in an embodiment of the present invention.
In the figure: 1-upper end cap, 2-lock nut, 3-upper seat, 4-spring top seat, 5-compression spring, 6-cushion assembly, 61-polyurethane top body, 62-cushion seat, 63-polyurethane body, 64-dust tube, 7-spring bottom seat, 71-flange, 72-bump, 73-profiled groove, 8-damper strut assembly, 80-piston valving, 80 a-valve bore, 80 b-valve plate, 81-piston rod, 810-isolation sleeve, 811-second compression valve, 812-compression cavity, 8121-compression end cap, 8122-compression return spring, 8123-compression bottom seat, 813-nitrogen cylinder, 8131-floating piston, 8132-normal through hole, 814-lower bushing, 82-support cap, 83-oil cylinder, 831-upper end boss, 832-bottom boss, 84-spring tray, 85-guide assembly, 86-restoring cavity, 861-restoring return spring, 862-restoring end cap, 862 a-taper groove, b-saw-tooth socket, 87 c-862-saw-tooth socket, 87-restoring tooth surface, first restoring valve, 88-restoring taper surface, first compression valve,
Detailed Description
The invention is described in further detail below with reference to the drawings and examples of the specification.
As shown in fig. 1-4, a nitrogen damper strut assembly comprises a piston rod 81, wherein a section of the piston rod 81 is sleeved in an oil cylinder 83 through a guide assembly 85, so as to maintain the track alignment of the piston rod 81;
the inner cavity of the oil cylinder 83 is filled with oil, and the oil participates in buffering damping operation; a nitrogen cylinder 813 provided beside the oil cylinder 83, wherein the nitrogen cylinder 813 is filled with nitrogen as a gas buffer medium to accommodate the displacement state of the piston rod 81;
the piston rod 81 is arranged in the oil cylinder 83, the rod body is sleeved with a piston valve system 80, the outer edge of the piston valve system 80 is in sealing fit with the inner wall of the oil cylinder 83, the piston valve system 80 comprises a first compression valve 88 and a first restoration valve 89, the first compression valve 88 is connected with the first restoration valve 89 in a jogged manner from top to bottom, and the first compression valve 88 is provided with a buffering damping structure aiming at downward movement, so that the downward movement buffering effect of the middle-section stroke of the piston rod 81 is realized; the first restoring valve 89 is provided with a buffering damping structure aiming at the upward movement, so that the upward movement buffering effect of the middle-section stroke of the piston rod 81 is realized;
the upper part of the piston valve system 80 is provided with a second recovery valve 87 at intervals, the lower part of the piston valve system 80 is provided with a second compression valve 811 at intervals, the second recovery valve 87 and the second compression valve 811 are sleeved and fixed on the piston rod 81, and the edges of the second recovery valve 87 and the second compression valve 811 keep a gap with the inner wall of the oil cylinder 83, so that in the middle-stage stroke state of the piston rod 81, the peripheries of the second recovery valve 87 and the second compression valve 811 are open flow channels, and the second recovery valve 87 and the second compression valve 811 do not participate in the buffer action in the middle-stage stroke state;
the second recovery valve 87 and the second compression valve 811 are respectively provided with valve holes 80a (as shown in fig. 10) penetrating along the axis of the valve body, so that after the two valve bodies are abutted against corresponding adapting parts, the valve holes 80a guide oil;
the upper end of the second recovery valve 87 is provided with a conical surface 87a (as shown in fig. 10) for vertically adapting to the corresponding component to form a sealing barrier, and the lower end surface of the second recovery valve 87 is provided with a valve plate 80b covering the valve hole 80a thereof in a fitting manner, so that after the conical surface 87a of the second recovery valve 87 is adapted to the corresponding component, the upward movement of the piston rod 81 will form an oil damping force by the lower valve plate 80b of the second recovery valve 87;
the lower end of the second compression valve 811 is provided with a conical surface 87a (reversely arranged according to the structure of fig. 10) for vertically adapting to the corresponding component to form a sealing barrier, and the upper end surface of the second compression valve 811 is provided with a valve plate 80b covering the valve hole 80a thereof in a fitting manner, so that after the conical surface 87a of the second compression valve 811 is adapted to the corresponding component, the downward movement of the piston rod 81 will form an oil damping force by the upper valve plate 80b of the second compression valve 811;
the top and the bottom of the inner cavity of the oil drum 83 are respectively provided with a restoring cavity 86 and a compressing cavity 812, a restoring return spring 861 and a restoring end cover 862 connected below the restoring spring 861 are arranged in the restoring cavity 86, a compressing return spring 8122 and a compressing end cover 8121 connected above the compressing return spring 8122 are arranged in the compressing cavity 812, and the outer edges of the restoring end cover 862 and the compressing end cover 8121 are in sealing fit with the inner wall of the oil drum 83, so that the restoring end cover 862 and the compressing end cover 8121 can be respectively used as an adapting butt joint body of the second restoring valve 87 and the second compressing valve 811, and when the butt joint is successful, the sealing fit between the end cover and the inner wall of the oil drum 83 can form a transverse barrier body of oil liquid, so that the second restoring valve 87 and the second compressing valve 811 play roles;
meanwhile, the elastic force of the restoring return spring 861 and the compressing return spring 8122 only serve as the restoring action of the restoring end cover 862 and the compressing end cover 8121 and do not participate in the buffering damping function;
a recovery end cap 862 is positioned above the second recovery valve 87 and a compression end cap 8121 is positioned below the second compression valve 811; the lower end surface of the restoring end cover 862 and the upper end surface of the compressing end cover 8121 are both provided with concave conical grooves 862a (as shown in fig. 11), the conical grooves 862a of the restoring end cover 862 are matched with the conical surfaces 87a of the second restoring valve 87, and the conical grooves 862a of the compressing end cover 8121 are matched with the conical surfaces 87a of the second compressing valve 811; therefore, when the piston rod 81 moves up to the end, the tapered surface 87a of the second recovery valve 87 is just attached in the tapered slot 862a of the recovery end cap 862, the tapered attaching structure is favorable for forming a tight transverse sealing barrier, so that the oil at the edge gap of the second recovery valve 87 is blocked by the recovery end cap 862, at this time, the oil can only flow from the valve hole 80a of the second recovery valve 87, and the valve plate 80b of the second recovery valve 87 generates an oil damping force, thereby playing a role of buffering and damping; similarly, when the piston rod 81 moves downward to the end, the tapered surface 87a of the second compression valve 811 is just attached to the tapered groove 862a of the compression end cap 8121, so that the valve plate 80b of the second compression valve 811 exerts a cushioning and damping function.
Through the design, when the vehicle runs on the urban pavement, the nitrogen shock absorber works in a sensitive area of the middle-stage travel, the edges of the second recovery valve 87 and the second compression valve 811 are all open gaps, and only the piston valve system 80 participates in the buffer work, so that the damping force is small, and the driving comfort is good; when the vehicle runs on the off-road surface, the nitrogen shock absorber works beyond the sensitive area of the middle-stage travel, the amplitude of the nitrogen shock absorber is increased, the piston rod 81 enters the travel of the top end and the bottom end for a plurality of times, and the second recovery valve 87 and the second compression valve 811 are respectively in contact with the recovery end cover 862 and the compression end cover 8121, so that the second recovery valve 87 and the second compression valve 811 start to play a damping role, the damping force of the whole piston rod 81 is increased, and the vehicle can be ensured to obtain good supportability and control stability on the off-road bumpy road surface. According to the mode, the magnitude of the oil-liquid damping force of the shock absorber can be automatically changed according to the up-down vibration amplitude of the vehicle on different roads, so that the impact sense of the tail end of a stroke is effectively reduced, meanwhile, the comfort of the vehicle running on paved roads and the control stability of the vehicle running on off-road roads are ensured, the running requirements of various different types of roads are simultaneously met, and the applicability and convenience of the nitrogen shock absorber are improved.
As shown in fig. 7-9, the piston valve system 80 includes a first compression valve 88 and a first recovery valve 89, wherein the first compression valve 88 and the first recovery valve 89 are both provided with valve holes 80a distributed along the axis of the valve body, the upper end surface of the first compression valve 88 is provided with a valve plate 80b covering the valve hole 80a, and the lower end surface of the first recovery valve 89 is provided with a valve plate 80b covering the valve hole 80 a; the structure can be formed by embedding the valve hole 80a arrays of the first compression valve 88 and the first restoring valve 89 in an interlaced manner, so that the upward movement of the piston valve system 80 forms an oil damping force by the valve hole 80a and the valve plate 80b of the first restoring valve 89, the downward movement of the piston valve system 80 forms an oil damping force by the valve hole 80a and the valve plate 80b of the second restoring valve 87, and the upward movement and the downward movement of the piston rod 81 have the piston valve system 80 to participate in damping operation in both middle stroke and end stroke, thereby providing a basic buffering damping function for the shock absorber.
In this embodiment, when the second recovery valve 87 is attached to the recovery end cap 862, the bottom edge of the tapered surface 87a of the second recovery valve 87 keeps a gap with the inner wall of the tapered groove 862a of the recovery end cap 862;
when the second compression valve 811 is attached to the compression end cap 8121, the bottom edge of the tapered surface 87a of the second compression valve 811 is kept in a gap with the inner wall of the tapered groove 862a of the compression end cap 8121;
by the above-mentioned gap arrangement, the excessive adhesion caused by the too tight adhesion of the second recovery valve 87 and the recovery end cap 862 can be prevented, the adhesion obstruction during the separation of the two can be avoided, and the separation action of the second compression valve 811 and the compression end cap 8121 can be smoothly implemented in the same way;
as shown in fig. 3 and 11, the edges of the recovery end cover 862 and the compression end cover 8121 are provided with saw-tooth shaped saw-tooth grooves 862b, a saw-tooth sealing ring 862c matched with the shape of each saw-tooth groove 862b is embedded in each saw-tooth groove 862b, and the saw-tooth sealing ring 862c is attached to the inner wall of the oil cylinder 83. Because the conditions of the recovery end cover 862 and the compression end cover 8121 are bumpy road sections when the recovery end cover and the compression end cover 8121 function, the two end covers bear larger impact load, and the sawtooth outline vertically arranged by the sawtooth groove 862b is utilized to enable the sawtooth sealing ring 862c to obtain extremely high vertical stability through the cooperation of the end cover edge sawtooth groove 862b and the sawtooth sealing ring 862c, so that the sealing ring is effectively prevented from being separated, the service life of the sealing ring is prolonged, replacement maintenance frequency is reduced, and the applicability and convenience of the shock absorber are further improved.
As shown in fig. 3 and 5, the top rod body of the piston rod 81 is sleeved with a buffer component 6, the buffer component 6 comprises a polyurethane main body 63, a buffer seat 62 and a polyurethane top body 61, the polyurethane main body 63 and the polyurethane top body 61 above the buffer component are connected into a whole through a cylindrical connector, the buffer seat 62 is sleeved on the periphery of the connector, and the whole stability of the buffer component 6 is ensured through the sleeved connection of the connector; the lower section part of the polyurethane main body 63, which is sleeved with the piston rod 81, forms a sleeved gap to provide an avoidance space for the folding of the polyurethane main body 63, wherein the section of the side wall of the lower section part of the polyurethane main body 63 is a zigzag side wall to facilitate the vertical folding of the polyurethane main body 63; when the vehicle encounters a large impact to make the piston rod 81 collide downwards, the lower end surface of the polyurethane main body 63 touches the supporting cover 82 and is folded while the second compression valve 811 provides an additional damping force, soft buffering is provided by the polyurethane material of the polyurethane main body, and meanwhile, abnormal noise can be effectively prevented by the unique polyurethane top body 61 design above, so that driving comfort and the service life of the buffer are further ensured.
In this embodiment, the buffer assembly 6 includes a dust-proof tube 64, and the dust-proof tube 64 is a bellows body, so that the dust-proof tube 64 can be folded and stretched correspondingly along with the up-and-down movement of the piston rod 81; the buffer seat 62 is in sealing engagement with the upper end surface of the dustproof pipe 64, so that dust-free cleanliness and service life of a sleeved part of the piston rod 81 and the oil drum 83 which are packaged in the dustproof pipe 64 are ensured; the lower end surface of the dustproof pipe 64 is fixed on a spring tray 84, and the spring tray 84 is sleeved and fixed on the outer wall surface of the oil drum 83, so that the form of the dustproof pipe 64 is ensured to be correct;
the polyurethane main body 63 is positioned in the dustproof pipe 64, and the upper surface of the polyurethane top body 61 is supported and provided with the spring top seat 4, so that the polyurethane main body 63 and the polyurethane top body 61 are protected by the dustproof pipe 64 in a packaging way, and dust-free cleanliness of the polyurethane main body and the polyurethane top body is ensured; the upper surface of the spring top seat 4 is fixedly provided with an upper support 3, and the upper support 3 is provided with a bolt hole or a bolt pair matched with a vehicle frame, so that the top of the buffer can be butted with the vehicle frame part of the vehicle body;
a lock nut 2 is attached above the upper support 3, and the lock nut 2 is screwed and fixed on a threaded surface at the top of the piston rod 81, so that the upper support 3 is prevented from deviating; the top of the piston rod 81 is sleeved with an upper end cover 1, and the upper end cover 1 covers the threaded surface at the top of the piston rod 81, so that the threaded surface is prevented from being corroded during storage.
Compression springs 5 are fixedly arranged between the spring top seat 4 and the spring tray 84, the compression springs 5 are sleeved on the outer edges of the dustproof pipes 64, auxiliary elastic force and return capability are provided through the compression springs 5, and meanwhile, two ends of each compression spring 5 are sleeved on bosses of the spring top seat 4 and the spring tray 84 respectively, so that the shape of each compression spring 5 is ensured to be correct.
As shown in fig. 3 and 6, a spring lower pad 7 is arranged above the spring tray 84, a raised flanging 71 is arranged at the edge of the spring lower pad 7, the outer wall of the compression spring 5 is embedded in the flanging 71, and the shape correction of the compression spring 5 is further ensured; the bottom surface of the spring lower cushion 7 is provided with a lug 72, and the lug 72 is embedded into a concave hole of the spring tray 84; the spring lower pad 7 is firmly fixed on the spring tray 84, so that the spring lower pad 7 is prevented from moving and falling off; the middle part of the spring lower cushion 7 is sunken to form a special-shaped groove 73, so that the wall thickness of the middle part of the spring lower cushion 7 is uniform, and the overall design weight is reduced.
In this embodiment, the outer wall of the rod body of the piston rod 81 is sleeved with a spacer 810, and the upper end and the lower end of the spacer 810 respectively support against the piston valve system 80 and the second compression valve 811; the length design of the isolation sleeve 810 is beneficial to accurately adjusting the installation position of the second compression valve 811, so that a proper end working stroke is formed;
the compression return spring 8122 is supported on the compression lower end pad 8123, the compression lower end pad 8123 is fixedly supported by a lower end boss 832 protruding from the inner wall of the oil cylinder 83, and the compression lower end pad 8123 is used as a support body of the compression return spring 8122, so that the adjustability of the working stroke of the compression end cover 8121 and the second compression valve 811 is further ensured; the lower boss 832 is a protrusion formed by stamping the side wall of the oil cylinder 83 and is embedded in a groove of the side wall of the compression lower end pad 8123, so that the quick positioning and fixing of actual production operation are facilitated;
in the present embodiment, the guide member 85 is of the oil seal guide type, ensuring the guide and sealing properties; the upper end of the guider component 85 is fixedly sleeved with a supporting cover 82, and the supporting cover 82 covers an upper opening of the oil drum 83; the guide assembly 85 is fixedly supported by the upper boss 831 protruding from the inner wall of the oil cylinder 83.
In the embodiment, the inner cavity of the nitrogen cylinder 813 is divided into an upper cavity and a lower cavity by a floating piston 8131, and the upper cavity above the floating piston 8131 is filled with nitrogen; the lower cavity below the floating piston 8131 is communicated with the inner cavity of the oil cylinder 83 through a normal through hole 8132 on the side wall; because the oil in the oil cylinder 83 has no compressibility, when the piston rod 81 is displaced, high-pressure nitrogen above the floating piston 8131 is utilized to provide compressibility for the inner cavity of the oil cylinder 83, for example, when the piston rod 81 moves downwards, part of the oil in the oil cylinder 83 enters the lower cavity through the normal through hole 8132; when the piston rod 81 moves upward, the oil in the lower chamber returns to the oil cylinder 83 through the normal through hole 8132. In the compression and recovery processes of the shock absorber, the oil liquid and the high-pressure nitrogen can respectively push the floating piston 8131, so that the oil liquid can be quickly filled into the lower cavity or returned into the oil cylinder 83, the action influence is quick, the execution efficiency is high, the compression idle stroke is effectively avoided, and the service life and the driving comfort of the shock absorber are further improved.
The embodiment also provides a nitrogen damper vehicle assembly, which comprises the nitrogen damper pillar assembly, wherein the top of the pillar assembly supports the frame of the vehicle assembly, and the bottom of the pillar assembly is arranged on the suspension of the vehicle assembly.
The working procedure of this embodiment is as follows:
the lower bushing 814 (positioned as in fig. 2) at the bottom of the shock absorber strut assembly 8 is hinged to the suspension of the vehicle assembly, and the upper support 3 at the top of the strut assembly is fixed under the frame of the vehicle assembly, thereby forming the nitrogen shock absorber vehicle assembly corresponding to different driving roads. The shock absorber performs different damping functions:
1. when the vehicle assembly runs on the urban pavement, the piston rod 81 is in a sensitive area of middle-stage travel, the vibration amplitude is limited, the position states of the piston rod 81 are shown in fig. 3, and the second recovery valve 87 and the second compression valve 811 are in an open circulation state along with oil liquid, so that the two valve bodies do not participate in damping operation, and only the edge of the piston valve system 80 in the middle of the piston rod 81 is attached to the inner wall of the oil cylinder 83, therefore, the middle piston valve system 80 provides proper buffering damping force, and the soft buffering and good comfort are ensured;
2. when the vehicle assembly runs on the cross-country bumpy road, the amplitude of the piston rod 81 is increased, and the piston rod 81 works beyond the sensitive area of the middle stroke for a plurality of times, so that the piston rod 81 enters the strokes of the top tail end and the bottom tail end for a plurality of times, and the second recovery valve 87 and the second compression valve 811 are respectively in fit contact with the recovery end cover 862 and the compression end cover 8121.
As shown in fig. 12, when the piston rod 81 moves down to the end stroke, the tapered surface 87a of the second compression valve 811 is fitted in the tapered groove 862a of the compression end cap 8121, the edge oil passage of the second compression valve 811 is blocked, the valve hole 80a and the valve plate 80b thereof exert damping action, and at this time, the downward movement state of the piston rod 81 is simultaneously subjected to the double damping forces of the second compression valve 811 and the piston valve system 80, so that the overall vibration damping force is automatically increased;
similarly, as shown in fig. 13, when the piston rod 81 moves up to the end stroke, the tapered surface 87a of the second recovery valve 87 is fitted in the tapered groove 862a of the recovery end cap 862, the edge oil passage of the second recovery valve 87 is blocked, and the valve hole 80a and the valve plate 80b thereof exert damping action, and at this time, the upward movement state of the piston rod 81 is simultaneously subjected to the double damping forces of the second recovery valve 87 and the piston valve system 80, so that the entire vibration damping force is automatically increased. Through above-mentioned working process, the second recovery valve 87, the automatic play buffering damping effect of second compression valve 811 at the end of journey effectively guarantees that the vehicle obtains good supportability and control stability on cross country jolting road surface, and this mode need not to carry out manual regulation according to the road conditions, can be according to the vehicle about the different road surface vibration range automatic change shock absorber oil liquid damping force's size to this makes the vehicle assembly can satisfy the travelling demand on various different grade type road surfaces simultaneously, guarantees the travelling comfort of vehicle on mating road surface simultaneously, and the supportability and the control stability of travelling on cross country jolting road surface.
The above description is only one of the preferred embodiments of the invention and is not intended to limit the invention in any way, it being understood that the embodiments may be modified and varied in other ways within the scope of the features defined in the appended claims, which are all intended to be covered by the scope of this invention.
Claims (10)
1. The utility model provides a nitrogen gas shock absorber pillar assembly, includes piston rod, its characterized in that: one section of the piston rod is sleeved in an oil cylinder through a guide device assembly, the inner cavity of the oil cylinder is filled with oil liquid, and a nitrogen cylinder is arranged beside the oil cylinder; the piston rod is arranged in the oil cylinder, a piston valve system is sleeved on the rod body, the outer edge of the piston valve system is in sealing fit with the inner wall of the oil cylinder, the piston valve system comprises a first compression valve and a first recovery valve, the first compression valve and the first recovery valve are connected in a jogged mode from top to bottom, the first compression valve is provided with a buffering damping structure aiming at downward movement, and the first recovery valve is provided with a buffering damping structure aiming at upward movement;
a second recovery valve is arranged above the piston valve system at intervals, a second compression valve is arranged below the piston valve system at intervals, the second recovery valve and the second compression valve are sleeved and fixed on the piston rod, the edges of the second recovery valve and the second compression valve keep a gap with the inner wall of the oil cylinder, and valve holes penetrating and distributed along the axis of the valve body are arranged on the second recovery valve and the second compression valve; the lower end of the second compression valve is provided with a conical surface, and the upper end surface of the second compression valve is provided with a valve plate covering the valve hole; the upper end of the second recovery valve is provided with a conical surface, and the lower end surface of the second recovery valve is provided with a valve plate covering the valve hole of the second recovery valve in a fitting manner;
the top and the bottom of the inner cavity of the oil cylinder are respectively provided with a restoring cavity and a compressing cavity, the restoring cavity is internally provided with a restoring return spring and a restoring end cover connected below the restoring return spring, the compressing cavity is internally provided with a compressing return spring and a compressing end cover connected above the compressing return spring, and the outer edges of the restoring end cover and the compressing end cover are in sealing fit with the inner wall of the oil cylinder; the recovery end cover is positioned above the second recovery valve, and the compression end cover is positioned below the second compression valve; the lower end face of the recovery end cover and the upper end face of the compression end cover are both provided with concave conical grooves, the conical grooves of the recovery end cover are matched with the conical surfaces of the second recovery valve, and the conical grooves of the compression end cover are matched with the conical surfaces of the second compression valve.
2. The nitrogen damper strut assembly as in claim 1, wherein: the valve body is characterized in that the first compression valve and the first recovery valve are respectively provided with valve holes distributed along the axis of the valve body, the upper end face of the first compression valve is provided with a valve plate covering the valve holes, and the lower end face of the first recovery valve is provided with a valve plate covering the valve holes.
3. The nitrogen damper strut assembly as in claim 1, wherein: when the second recovery valve is attached to the recovery end cover, a gap is kept between the conical bottom edge of the conical surface of the second recovery valve and the inner wall of the conical groove of the recovery end cover;
when the second compression valve is attached to the compression end cover, a gap is kept between the conical bottom edge of the conical surface of the second compression valve and the inner wall of the conical groove of the compression end cover;
the edge of the restoration end cover and the edge of the compression end cover are provided with serrated sawtooth grooves, each serrated groove is embedded with a serrated sealing ring matched with the serrated sealing ring in shape, and the serrated sealing rings are attached to the inner wall of the oil cylinder.
4. The nitrogen damper strut assembly as in claim 1, wherein: the top rod body of the piston rod is sleeved with a buffer assembly, the buffer assembly comprises a polyurethane main body, a buffer seat and a polyurethane top body, the polyurethane main body and the polyurethane top body above the buffer assembly are integrally connected through a cylindrical connector, the buffer seat is sleeved on the periphery of the connector, the polyurethane main body is sleeved on the lower section of the piston rod to form a sleeve gap, and the section of the side wall of the lower section of the polyurethane main body is a zigzag side wall;
the buffer assembly comprises a dustproof pipe, the dustproof pipe is a corrugated pipe body, the buffer seat is in sealing connection with the upper end face of the dustproof pipe, the lower end face of the dustproof pipe is fixed on a spring tray, and the spring tray is sleeved and fixed on the outer wall face of the oil cylinder;
the polyurethane main body is positioned in the dust cover, a spring top seat is supported on the upper surface of the polyurethane top body, an upper support is fixedly arranged on the upper surface of the spring top seat, and a bolt hole or a bolt pair matched with the frame is arranged on the upper support;
the upper support is provided with a lock nut in a fitting mode, the lock nut is fixed on a threaded surface of the top of the piston rod in a screwing mode, the top end of the piston rod is sleeved with an upper end cover, and the upper end cover covers the threaded surface of the top of the piston rod.
5. The nitrogen damper strut assembly as in claim 4, wherein: compression springs are fixedly arranged between the spring top seat and the spring tray, and are sleeved on the outer edges of the dustproof pipes.
6. The nitrogen damper strut assembly as in claim 1, wherein: a spring lower cushion is arranged above the spring tray, a convex wrapping edge is arranged at the edge of the spring lower cushion, and the outer wall of the compression spring is embedded in the wrapping edge; the bottom surface of the spring lower pad is provided with a lug which is embedded into a concave hole of the spring tray; the middle part of the spring lower cushion is sunken to form a special-shaped groove, so that the wall thickness of the middle part of the spring lower cushion is uniform.
7. The nitrogen damper strut assembly as in claim 1, wherein: an isolation sleeve is sleeved on the outer wall of the rod body of the piston rod, and the upper end and the lower end of the isolation sleeve respectively prop against the piston valve system and the second compression valve;
the compression return spring is supported on the compression lower end pad, and the compression lower end pad is fixedly supported through a lower end boss protruding from the inner wall of the oil cylinder.
8. The nitrogen damper strut assembly as in claim 1, wherein: the guide device assembly is of an oil seal guide device, a support cover is fixedly sleeved at the upper end of the guide device assembly, and the support cover covers the upper opening of the oil cylinder; the guide assembly is fixedly supported through the boss at the upper end of the protrusion of the inner wall of the oil cylinder.
9. The nitrogen damper strut assembly as in claim 1, wherein: the inner cavity of the nitrogen cylinder is divided into an upper cavity and a lower cavity by a floating piston, and nitrogen is filled in the upper cavity above the floating piston; the lower cavity below the floating piston is communicated with the inner cavity of the oil cylinder through a normal through hole of the side wall.
10. A nitrogen damper vehicle assembly comprising the nitrogen damper strut assembly of any one of claims 1 to 9, the strut assembly top supporting a frame of the vehicle assembly, the strut assembly bottom being disposed on a suspension of the vehicle assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310861570.9A CN116608235A (en) | 2023-07-14 | 2023-07-14 | Nitrogen damper pillar assembly and vehicle assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310861570.9A CN116608235A (en) | 2023-07-14 | 2023-07-14 | Nitrogen damper pillar assembly and vehicle assembly |
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| CN116608235A true CN116608235A (en) | 2023-08-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310861570.9A Pending CN116608235A (en) | 2023-07-14 | 2023-07-14 | Nitrogen damper pillar assembly and vehicle assembly |
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| CN108291604A (en) * | 2015-12-04 | 2018-07-17 | 蒂森克虏伯比尔斯坦有限公司 | Damper with hydraulic damping in compression stage impact |
| CN112483579A (en) * | 2019-09-12 | 2021-03-12 | 蒂森克虏伯比尔斯坦有限公司 | Hydraulic damper with pull stop and push stop |
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| US4828232A (en) * | 1983-11-14 | 1989-05-09 | General Motors Corporation | Vehicle air suspension strut with compliant cover plate assembly |
| JP2002070913A (en) * | 2000-08-24 | 2002-03-08 | Showa Corp | Hydraulic shock absorber |
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