CN110822002A - Damping type bottom-touch-preventing shock absorber and motor tricycle - Google Patents
Damping type bottom-touch-preventing shock absorber and motor tricycle Download PDFInfo
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- CN110822002A CN110822002A CN201911275951.9A CN201911275951A CN110822002A CN 110822002 A CN110822002 A CN 110822002A CN 201911275951 A CN201911275951 A CN 201911275951A CN 110822002 A CN110822002 A CN 110822002A
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- inner cylinder
- damping
- shock absorber
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- cylinder
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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
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
- F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
- F16F9/16—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts
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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
- F16F13/005—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a wound spring and a damper, e.g. a friction damper
- F16F13/007—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a wound spring and a damper, e.g. a friction damper the damper being a fluid damper
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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
- 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
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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
- 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
- F16F9/3235—Constructional features of cylinders
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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
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3278—Details for lubrication
Abstract
The invention discloses a damping type anti-touch bottom shock absorber and a motor tricycle, which comprise an inner cylinder, an outer cylinder and a damping main spring, wherein the damping main spring is sleeved outside the inner cylinder and the outer cylinder simultaneously; the inner cylinder is sleeved in the outer cylinder through a piston, a lubricating hole is formed in the position, above the piston, of the inner cylinder, oil is filled in a space, opposite to the descending direction of the piston, in the outer cylinder, and the space is communicated with the inner cylinder; the shock absorber adopts the anti-bottom-touching damping piece arranged at the bottom of the outer cylinder, and in the process that the inner cylinder descends and is externally sleeved on the anti-bottom-touching damping piece, hydraulic oil in the outer cylinder can only enter the inner cylinder through a gap, so that effective compression damping force is formed, bottom touching can be effectively prevented, meanwhile, the hydraulic oil flows to the upper part of the piston through the lubricating hole under pressure, the lubrication of the piston is facilitated, and the stress concentration phenomenon of the piston is improved.
Description
Technical Field
The invention belongs to the technical field of motor vehicles, and relates to a damping type bottom-touching-preventing shock absorber and a motor tricycle.
Background
The shock absorber is a necessary part of the motor vehicle, the structure influences the controllability and the comfort of the whole vehicle, and the stability and the reliability of the performance directly relate to the safety, the reliability, the comfort and the controllability of the whole vehicle. The existing shock absorber generally comprises an inner cylinder, an outer cylinder and a shock absorption spring; the inner cylinder is generally sleeved in the outer cylinder through a piston, a space between the outer cylinder and the piston, which is opposite to the downward direction, is filled with hydraulic oil, when the inner cylinder reciprocates, the hydraulic oil flows in the space and the inner cylinder to play roles of lubrication and limited liquid damping, and in fact, as the diameters of the inner cylinder and the outer cylinder are not different greatly, the damping effect is also limited, and an effective compression damping force cannot be formed.
Among the prior art, motor tricycle adopts aforementioned structure in order to practice thrift overall cost, one of them in the preceding bumper shock absorber, and the bumper shock absorber of this structure recovers the damping and has better effect, nevertheless can not form effectual compression damping, consequently, on the rough road surface that is slightly bigger, then can appear under the condition that the bumper shock absorber touched the end, seriously influences the nature controlled, travelling comfort and the fail safe nature of whole car.
Therefore, the damping type bottom-contact-preventing shock absorber and the motor tricycle are needed, the compression damping and the recovery damping and the buffering rigidity of the shock absorber can be reasonably adjusted under the condition that more cost is not increased, the bottom contact cannot be easily caused when the shock absorber runs on a common load and an uneven road, and the controllability, the comfort and the stability and the safety and the reliability are improved.
Disclosure of Invention
In view of the above, the invention provides a damping type anti-bottoming shock absorber and a motor tricycle, which can reasonably adjust the compression damping, the recovery damping and the buffering rigidity of the shock absorber without increasing more cost, can not bottom easily when a common load and an uneven road surface are driven, and improve the controllability, the comfort and the stability as well as the safety and the reliability.
The damping type anti-touch bottom shock absorber comprises an inner cylinder, an outer cylinder and a damping main spring, wherein the damping main spring is sleeved outside the inner cylinder and the outer cylinder simultaneously; the inner cylinder is sleeved in the outer cylinder through a piston, a lubricating hole is formed in the position, above the piston, of the inner cylinder, oil is filled in a space, opposite to the descending direction of the piston, in the outer cylinder, and the space is communicated with the inner cylinder. In the process that the inner cylinder moves downwards and is sleeved outside the bottom-touch-proof damping part, hydraulic oil in the outer cylinder can only enter the inner cylinder through a gap, so that effective compression damping is formed, meanwhile, the hydraulic oil flows to the upper side of the piston through the lubricating hole under pressure and forms pressure on the upper side of the piston, the lubrication of the piston is facilitated, and the stress concentration phenomenon caused by the large pressure of the lower end is improved.
Furthermore, the inner cylinder is sleeved with a guide plug, the guide plug is connected to the inner wall of the outer cylinder and located above the piston, and the lubricating hole penetrates through a lubricating cavity between the piston and the guide plug. In the compression stroke of the downward operation of the inner cylinder, hydraulic oil enters the inner cylinder through a gap, gas in the inner cylinder is pressurized, the piston synchronously moves downwards in the downward operation process of the inner cylinder, the lubricating cavity is enlarged, when the hydraulic oil does not contact the lubricating hole, the lubricating hole is used as a gas hole, so that the compressed gas in the inner cylinder is discharged into the lubricating cavity, the gas pressure of the gas in the inner cylinder is improved, the temperature of the compressed gas in the inner cylinder is reduced, when the hydraulic oil contacts the lubricating hole, part of the hydraulic oil flows into the lubricating cavity and forms pressure on the piston and the guide plug, the lubrication of the guide plug and the piston is facilitated, wherein the upper end and the lower end of the piston are subjected to oil pressure, the oil film forming efficiency is improved between the piston and the inner cylinder as well as between the piston and the outer cylinder, the lubricating effect is further improved, the stress; when the piston damping main spring drives the inner cylinder to move upwards, hydraulic oil in the lubricating cavity is pressed to flow outwards through the lubricating hole to form restoring damping force to compensate the restoring force, the damping comfort degree is improved, and meanwhile, residual gas in the lubricating cavity is pressed to form buffering so as to improve the sudden change phenomenon of the damping force.
Furthermore, when the bottom of the inner cylinder is not contacted with oil, the liquid level of the oil is 10-20mm higher than the top of the anti-touch bottom damping part. The relative position relation of the liquid level height and the damping piece determines the magnitude of the damping force, and the magnitude of the damping force is controlled through determining the relative position relation of the liquid level height and the damping piece, so that the damping force is in a comfortable range of a human body, the oil pressure is controlled in a corresponding range, and leakage of hydraulic oil caused by overhigh oil pressure is avoided.
Further, the distance between the lubricating hole and the bottom of the inner cylinder is 30-40mm less than the height of the liquid level. The distance control ensures that hydraulic oil does not enter the lubricating hole at the initial stage of sleeving the inner cylinder on the bottom-touch-preventing damping part, and the stability of the compression damping force in the process is ensured.
Furthermore, the cross sections of the inner cylinder and the anti-touch bottom damping part are circular, and a radial gap is formed between the outer circle of the anti-touch bottom damping part and the inner circle of the inner cylinder when the inner cylinder moves downwards and is sleeved outside the anti-touch bottom damping part. The round structure is beneficial to manufacturing and assembling, the working efficiency is improved, and the manufacturing cost is saved;
further, the top of the bottom-touch prevention damping part facing the inner cylinder is in a frustum shape, the taper of the conical table is 20-25 degrees, and the conical table accounts for 15-25% of the axial length of the bottom-touch prevention damping part. The conical platform structure enables the damping process to be buffered from small to large, avoids larger pause and frustration caused by sudden damping, meanwhile, the frustum is beneficial to centering and guiding the inner cylinder downwards through larger taper, corrects the eccentricity of the anti-touch damping part, avoids the interference between the cylindrical body of the anti-touch damping part and the inner cylinder, the angle of the linear change of the damping force can be increased in the damping process through the larger taper and the length proportion of the taper table, so that the compression damping force can smoothly reach the peak value in a smaller stroke, the bottom-touching prevention effect is improved, the damping stroke of the shock absorber can be reduced, the compactness of the shock absorber is improved, the conical platform can improve the compression damping force and simultaneously can ensure that the damping buffering process is smoothly transited, the formed linear damping force change improves the comfort and the stability of driving, the shock before the bottom-touch prevention damping can be effectively buffered, the driving comfort is ensured, and the bottom touch is effectively avoided.
Further, the radial gap is 0.8-1.2 mm. The taper of this clearance fit toper platform and the axial length of toper platform can reduce the probability that circle was interfered in anti-touch bottom damping spare and the inner tube, reduce the fault rate of bumper shock absorber in the use, provide sufficient and stable compression damping force in less shock attenuation stroke, can reduce the installation accuracy requirement to anti-touch bottom damping spare moreover.
Further, an elastic piece for preventing the piston from contacting with the guide plug is arranged in the lubricating cavity. The elastic force of the elastic piece prevents the rigid contact between the piston and the guide plug when the inner cylinder moves upwards and resets, and the service life of the piston and the guide plug is prolonged.
Further, the bottom-touch prevention damping part is welded or integrally formed at the bottom of the outer barrel. Compared with a mode of fixing through bolts, the connection mode greatly improves the stability of the bottom-touching-proof damping part, effectively guarantees the concentricity of the bottom-touching-proof damping part and the inner cylinder, reduces the failure rate, and improves the stability and the reliability of the system.
The invention also discloses a motor tricycle, wherein at least one shock absorber in a front fork assembly of the motor tricycle adopts the damping type anti-bottom-touching shock absorber structure.
The invention has the beneficial effects that:
the invention relates to a damping type anti-bottom-touching shock absorber and a motor tricycle, which adopt an anti-bottom-touching damping piece arranged at the bottom of an outer cylinder, in the process that the inner cylinder descends and is externally sleeved on the anti-touch bottom damping part, the hydraulic oil in the outer cylinder can only enter the inner cylinder through the gap, thereby forming effective compression damping force, effectively preventing bottom contact, simultaneously, hydraulic oil flows to the upper part of the piston through the lubricating hole under pressure and forms pressure on the upper part of the piston, being beneficial to the lubrication of the piston, improving the stress concentration phenomenon caused by larger pressure at one end of the piston, when the inner cylinder moves upwards, hydraulic oil in the lubricating cavity is pressed and flows outwards through the lubricating hole to form restoring damping force to compensate restoring force, the compression damping force and the recovery damping force of the shock absorber are reasonably adjusted through the structure, the shock absorption comfort level is improved, meanwhile, when the inner cylinder moves upwards, residual gas in the lubricating cavity is pressed to form buffering so as to improve the sudden change phenomenon of the damping force; the shock absorber can avoid touching the bottom when the shock absorber runs on a relatively uneven road surface, improves the running comfort and guarantees the controllability, is favorable for guaranteeing the service life of the shock absorber, can achieve the purposes of preventing touching the bottom and protecting parts from being touched to cause damage and simultaneously realize the compensation of restoring force under the relatively small improvement, and improves the controllability, the comfort and the safety and reliability.
Drawings
The invention is further described below with reference to the figures and examples.
FIG. 1 is a schematic view of the overall structure of a shock absorber;
FIG. 2 is a partial view of a shock absorber;
FIG. 3 is a front view of the motor tricycle;
FIG. 4 is a schematic view of a side view structure of the motor tricycle;
FIG. 5 is a schematic view of a partial structure of a motor tricycle;
Detailed Description
FIG. 1 is a schematic view of the overall structure of a shock absorber; FIG. 2 is a partial view of a shock absorber; FIG. 3 is a front view of the motor tricycle; FIG. 4 is a schematic view of a side view structure of the motor tricycle; FIG. 5 is a schematic view of a partial structure of a motor tricycle;
the embodiment provides a damping type anti-touch bottom shock absorber which comprises an inner cylinder 1, an outer cylinder 2, a damping main spring 3, an anti-touch bottom damping part 4 and a damping device, wherein the damping main spring is sleeved outside the inner cylinder and the outer cylinder at the same time; the inner cylinder is sleeved in the outer cylinder through a piston 5, a lubricating hole 6 is formed in the position, above the piston, of the inner cylinder, oil is filled in a space, opposite to the descending direction of the piston, in the outer cylinder, and the space is communicated with the inner cylinder.
As shown in the figure, the downward movement of the piston 5 is a compression stroke, and the upward movement is a recovery stroke; the space opposite to the space where the piston 5 descends and the space above the piston 5 form a seal through the piston; the height of the bottom-contact-preventing damping part is 50% -60% of the whole damping stroke of the shock absorber, namely, the bottom-contact-preventing damping part plays a role in the range of 50% -60% of the tail end of the damping stroke, the bottom-contact-preventing damping part is inserted in advance to form damping force, so that the inner cylinder has enough stroke buffering to prevent bottom contact, in the process that the inner cylinder descends and is sleeved outside the bottom-contact-preventing damping part, hydraulic oil in the outer cylinder can only enter the inner cylinder through a gap to form effective compression damping, and meanwhile, the hydraulic oil flows to the upper side of the piston through a lubricating hole under pressure to form pressure on the upper side of the piston, so that the lubrication of the piston is facilitated, and the stress concentration phenomenon caused by the larger pressure at one end; because the anti-bottom-touch damping part is positioned at the bottom in the outer cylinder and faces the incoming direction of the inner cylinder in the compression stroke, the anti-bottom-touch damping part 4 starts to form a gap when entering the lower port of the inner cylinder, and hydraulic oil flows from the outer cylinder to the inner cylinder through the gap to form compression damping force, so that the compression damping can be effectively increased; when the piston damping main spring drives the inner cylinder to move upwards, hydraulic oil in the smaller lubricating cavity flows outwards through the lubricating hole under pressure to form restoring damping force to compensate restoring force, and the compression damping force and the restoring damping force of the shock absorber are reasonably adjusted through the structure, so that the damping comfort is improved;
the main damping spring is an abrupt pitch spring composed of a long pitch section 31 and a short pitch section 32. The sudden change pitch spring refers to a standard spring with a large pitch and the same pitch in the long pitch section, and a standard spring with a small pitch and the same pitch in the short pitch section, which is different from the gradual change spring in the prior art;
the matching relation between an outer cylinder 2 and an inner cylinder 1 of the shock absorber and a main damping spring 3 belongs to the existing structure, namely, the inner cylinder is generally sleeved in the outer cylinder through a piston 4, wherein the piston 4 reciprocates in the outer cylinder along with the inner cylinder, the main damping spring is sleeved outside the outer cylinder and the inner cylinder in the length direction, the outer wall of the outer cylinder and the outer wall of the inner cylinder are both connected with damping discs, two ends of the main damping spring are connected to the two damping discs and used for forming damping and buffering on the relative motion of the inner cylinder and the outer cylinder, hydraulic oil is filled in a space where the outer cylinder and the piston 5 downwards move oppositely, the hydraulic oil plays a lubricating role during reciprocating motion of the inner cylinder, and the hydraulic oil can flow into; in the structure, the spring with the suddenly changed pitch is adopted, so that segmented damping buffering can be formed, the compression damping buffering stroke is increased, longer buffering is realized before the shock absorber touches the bottom, the bottom touch can be avoided favorably by combining with the rigidity setting, and the driving comfort is improved;
the elastic coefficient of the long pitch section is 20-30N/mm, and the elastic coefficient of the short pitch section is 40-60N/mm. The elastic coefficient of the long pitch section is preferably 26.3N/mm, the elastic coefficient of the short pitch section is preferably 50.4N/mm, the elastic coefficient range is improved compared with a main damping spring generally adopted in the prior art, and the buffering force is adjusted in the same sudden-change spring, so that the buffering elastic force has a smaller inflection point, the stability and the comfort are realized when the vehicle runs on normal and slightly uneven road surfaces, the buffering elastic force is increased when the vehicle runs on a slightly uneven road surface, the running comfort is ensured while the vehicle is prevented from being touched, and the safety is ensured.
The proportion of the long pitch section in the total length of the spring is 65-75%; the pitch of the long pitch section is 26-28mm and the pitch of the short pitch section is 14-16 mm. The proportion of the long pitch section to the total length of the spring is preferably 70%, so that the buffer stroke is ensured to be relatively abundant in the normal running process, and the running comfort is favorably improved; the pitch of the long pitch section is preferably 28mm, the pitch of the short pitch section is preferably 16mm, and the setting of the pitch range ensures the effective connection of the vehicle running buffer and the bottom-contact-preventing buffer, and ensures the running comfort and the controllability.
In this embodiment, the damping main spring 3 is sleeved outside the inner cylinder 1 and the outer cylinder 2 in a manner that the long pitch section 31 is downward, that is, the end where the upper long pitch section 31 is located is the lower end of the damping main spring, and this structure is favorable for ensuring the stability of the main damping spring 3, and is favorable for the regularity of the driving buffer and the bottom-touch prevention buffer, thereby ensuring the driving comfort and the controllability.
The inner cylinder is also sleeved with a guide plug 7, the guide plug is connected to the inner wall of the outer cylinder and positioned above the piston, and the lubricating hole is communicated in a lubricating cavity between the piston and the guide plug.
Referring to fig. 1, the piston is connected to the outer wall of the inner cylinder and reciprocates up or down along with the inner cylinder, wherein the two clamp springs sleeved on the inner cylinder are clamped at the upper end and the lower end of the piston cylinder to form axial positioning for the piston cylinder, the guide plug also forms axial positioning through the clamp spring sleeved on the outer cylinder, and the clamp springs are arranged in corresponding clamp grooves to prevent the clamp grooves from axially moving; the outer wall of the inner cylinder, the inner wall of the outer cylinder, the guide plug and the piston form a lubricating cavity in a surrounding mode, hydraulic oil enters the inner cylinder through a gap in a compression stroke when the inner cylinder moves downwards, air in the inner cylinder is pressurized, the piston synchronously moves downwards in the downward operation process of the inner cylinder, the lubricating cavity is enlarged, when the hydraulic oil does not reach the lubricating hole, the lubricating hole serves as an air hole, the compressed air in the inner cylinder is discharged into the lubricating cavity, the air pressure of the air in the inner cylinder is improved, the temperature of the compressed air in the inner cylinder is reduced, when the hydraulic oil reaches the lubricating hole, part of the hydraulic oil flows into the lubricating cavity and forms pressure on the piston and the guide plug, the lubricating of the guide plug and the piston is facilitated, the upper end and the lower end of the piston are all subjected to oil pressure, the oil film forming efficiency between the piston and the inner cylinder and between the piston and the outer, the service life of the piston is prolonged; when the piston damping main spring drives the inner cylinder to move upwards, hydraulic oil in the lubricating cavity is pressed to flow outwards through the lubricating hole to form restoring damping force to compensate the restoring force, the damping comfort degree is improved, and meanwhile, residual gas in the lubricating cavity is pressed to form buffering so as to improve the sudden change phenomenon of the damping force.
In this embodiment, the inner cylinder is further sleeved with a sealing ring 8, the outer circle or the inner circle of the inner cylinder is connected with a pressing part, and the pressing part presses the sealing ring above the guide plug to seal between the inner cylinder and the outer cylinder. The sealing ring adopts a common rubber sealing ring as an oil seal of the shock absorber, the pressing part 9 comprises a wire ring and an ash cover, the wire ring and the ash cover are both of annular structures, the thread of the wire ring is internally screwed at the inner circle of the upper end of the outer cylinder and axially presses the sealing ring downwards, the sealing ring is pressed at the upper end of the guide plug, meanwhile, the wire ring is radially pressed on the ash cover to ensure that the inner side of the ash cover is attached to the outer circle of the inner cylinder, the wire ring and the ash cover are of the existing structures, and details are omitted; of course, the pressing part can also adopt structures such as a snap spring and the like to press down the sealing ring, and the annular area between the inner cylinder and the outer cylinder forms a sealing structure through the structure, so that oil leakage is prevented.
In the embodiment, when the bottom of the inner cylinder is not contacted with oil, the liquid level of the oil is 10-20mm higher than the top of the anti-touch bottom damping piece. The preferred 15mm of fluid liquid level height out anti-touch bottom damping piece top, liquid level height is the distance of liquid level distance inner tube bottom, and the relative position relation of liquid level height and damping piece has decided the size of damping force, through the affirmation to the two relative position relation, controls the size of damping force for this damping force is at the comparatively comfortable within range of human body, also controls the oil pressure moreover in corresponding within range, avoids the hydraulic oil that the oil pressure too high leads to reveal.
In the embodiment, the distance between the lubricating hole 6 and the bottom of the inner cylinder is 30-40mm less than the height of the liquid level. When the liquid level was not when contact fluid bottom inner tube portion, the distance of liquid level distance inner tube bottom, the distance of lubrication hole distance inner tube bottom was the distance of circle minimum distance inner tube bottom in the lubrication hole, and the distance of preferred lubrication hole 6 distance inner tube bottom is less than liquid level 35mm, guarantees through this distance control in the anti-touch end damping spare initial stage at inner tube cover, and hydraulic oil does not get into in the lubrication hole, guarantees the stability of initial in-process compression damping power.
In this embodiment, the cross sections of the inner cylinder and the anti-touch damping member are circular, and a radial gap is formed between the outer circle of the anti-touch damping member and the inner circle of the inner cylinder when the inner cylinder moves downwards and is sleeved outside the anti-touch damping member. As shown in the figure, the bottom-touch prevention damping part 4 is a metal cylindrical part, the top end of the bottom-touch prevention damping part is in a conical table shape, and the circular structure is beneficial to manufacturing and assembling, so that the working efficiency is improved, and the manufacturing cost is saved;
in this embodiment, the top of the bottom-strike-proof damping member facing the inner cylinder is a tapered platform 41, the taper of the tapered platform is 20 to 25 degrees, and the tapered platform accounts for 15 to 25 percent of the axial length of the bottom-strike-proof damping member. The taper of the conical table is preferably 25 degrees, the axial length of the conical table occupying the bottom-touching prevention damping part is preferably 20 percent, the structure of the conical table 41 ensures that the damping process is buffered from small to large, the larger pause and contusion caused by sudden damping is avoided, the driving comfort control safety is further improved, meanwhile, the conical table is beneficial to centering and also beneficial to carrying out downlink guide on the inner cylinder through the larger taper, the eccentricity of the bottom-touching prevention damping part is corrected, the interference between the cylindrical body and the inner cylinder of the bottom-touching prevention damping part is avoided, and the eccentric wear of the piston in the process before bottom touching is prevented; the angle of linear change of the damping force can be increased in the damping process through larger taper and by matching with the occupied length proportion of the conical table, so that the compression damping force smoothly reaches the peak value in a smaller stroke, the anti-bottoming effect is improved, the damping stroke of the shock absorber can be reduced, the compactness of the shock absorber is improved, the damping buffer process can be smoothly transited when the compression damping force is improved by the conical table, the comfort and the stability of driving are improved by the change of the formed linear damping force, the shock before anti-bottoming damping can be effectively buffered, the driving comfort is ensured, and the bottoming is effectively avoided.
In this embodiment, the radial gap is 0.8-1.2 mm. The radial clearance is preferably 1.0mm, the radial clearance refers to the radial clearance between the excircle of the bottom-touching-proof damping part and the inner circle of the inner cylinder, the radial clearance in the range can ensure enough compression damping force, the bottom touching can be effectively prevented, the driving comfort is ensured, the taper of the conical table and the axial length of the conical table are in clearance fit, the probability of interference between the bottom-touching-proof damping part and the inner circle of the inner cylinder can be reduced, the failure rate of the shock absorber in the use process is reduced, sufficient and stable compression damping force is provided in a smaller shock absorption stroke, the installation accuracy requirement of the bottom-touching-proof damping part can be reduced, the clearance in the range is combined with a main shock absorption spring with a sudden change pitch, the bottom touching can be effectively prevented, and the driving comfort is ensured.
In this embodiment, an elastic member 10 for preventing the piston from contacting the guide plug is provided in the lubrication cavity. The elastic part is a cylindrical spiral spring, the elastic part is sleeved outside the inner barrel, when the inner barrel moves upwards and resets, the elastic part is in a compressed state, the elastic force of the elastic part prevents the piston from rigidly contacting the guide plug, and the service lives of the piston and the guide plug are prolonged.
In this embodiment, the bottom-touch prevention damping member is welded or integrally formed at the bottom of the outer cylinder. In order to ensure that the bottom-contact-preventing damping part is always stable and not eccentric in the using process, the bottom-contact-preventing damping part is welded or integrally formed at the bottom of the outer barrel, and compared with a mode of fixing through bolts, the connecting mode greatly improves the stability of the bottom-contact-preventing damping part, effectively ensures the concentricity of the bottom-contact-preventing damping part and the inner barrel, reduces the failure rate and improves the stability and the reliability of a system.
The invention also discloses a motor tricycle, wherein at least one shock absorber in a front fork assembly of the motor tricycle adopts the damping type anti-bottoming shock absorber structure. Referring to fig. 3 and 4, the three-wheeled motorcycle is a three-wheeled structure, and includes a front wheel 11, a left rear wheel 12, a right rear wheel 13, a frame 14, an engine, and other components, a windshield 15 is disposed right in front of the tricycle, and a hopper 16 is disposed at the rear of the tricycle; the application does not relate to the improvement of other parts except the shock absorber in the tricycle, and only aims at the improvement of the shock absorber; referring to fig. 5, two shock absorbers are disposed in a front fork assembly of a front suspension, and the two shock absorbers are disposed on left and right sides of a front wheel, and both the two shock absorbers in this embodiment adopt the damping type anti-bottom-collision shock absorber described above, and of course, one of the two shock absorbers can be selected to adopt the damping type anti-bottom-collision shock absorber described in this embodiment according to a structure and an operation condition of an actual tricycle, which is not specifically described in detail;
finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (10)
1. The utility model provides a damping type bumper shock absorber of preventing touching end, includes inner tube, urceolus and shock attenuation main spring, the outer cover is in inner tube and urceolus, its characterized in that simultaneously in the shock attenuation main spring: the anti-touch bottom damping piece is mounted on the inner bottom of the outer cylinder in a manner of facing the inner cylinder, and when the inner cylinder is sleeved outside the anti-touch bottom damping piece downwards, a gap is formed between the inner cylinder and the anti-touch bottom damping piece in the transverse direction; the inner cylinder is sleeved in the outer cylinder through a piston, a lubricating hole is formed in the position, above the piston, of the inner cylinder, oil is filled in a space, opposite to the descending direction of the piston, in the outer cylinder, and the space is communicated with the inner cylinder.
2. The damped bottomless shock absorber according to claim 1, wherein: the inner cylinder is also sleeved with a guide plug, the guide plug is connected to the inner wall of the outer cylinder and positioned above the piston, and the lubricating hole is communicated in a lubricating cavity between the piston and the guide plug.
3. The damped bottomless shock absorber according to claim 1, wherein: when the bottom of the inner cylinder is not contacted with oil, the liquid level of the oil is 10-20mm higher than the top of the anti-touch bottom damping part.
4. The damped bottomless shock absorber according to claim 2, wherein: the distance between the lubricating hole and the bottom of the inner cylinder is 30-40mm less than the height of the liquid level.
5. The damped bottomless shock absorber according to claim 1, wherein: the cross sections of the inner cylinder and the anti-touch bottom damping part are circular, and a radial gap is formed between the outer circle of the anti-touch bottom damping part and the inner circle of the inner cylinder when the inner cylinder moves downwards and is sleeved outside the anti-touch bottom damping part.
6. The damped bottomless shock absorber according to claim 5, wherein: the top of the anti-bottoming damping part facing the inner cylinder is a conical table, the taper of the conical table is 20-25 degrees, and the conical table accounts for 15-25% of the axial length of the anti-bottoming damping part.
7. The damped bottomless shock absorber according to claim 5, wherein: the radial clearance is 0.8-1.2 mm.
8. The damped bottomless shock absorber according to claim 2, wherein: and an elastic part for preventing the piston from contacting with the guide plug is arranged in the lubricating cavity.
9. The damped bottomless shock absorber according to claim 1, wherein: the anti-bottoming damping piece is welded or integrally formed at the bottom of the outer barrel.
10. A motor tricycle, characterized in that: at least one shock absorber in the front fork assembly of the motor tricycle adopts a damping type anti-bottoming shock absorber structure as claimed in any one of claims 1-9.
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| CN110822002B (en) | 2022-03-11 |
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