CN109340296B - Shock absorber capable of prolonging service life - Google Patents
Shock absorber capable of prolonging service life Download PDFInfo
- Publication number
- CN109340296B CN109340296B CN201811337340.8A CN201811337340A CN109340296B CN 109340296 B CN109340296 B CN 109340296B CN 201811337340 A CN201811337340 A CN 201811337340A CN 109340296 B CN109340296 B CN 109340296B
- Authority
- CN
- China
- Prior art keywords
- locking ring
- piston rod
- oil storage
- storage cylinder
- piston
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- F16F9/18—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 with a closed cylinder and a piston separating two or more working spaces therein
- F16F9/19—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 with a closed cylinder and a piston separating two or more working spaces therein with a single cylinder and of single-tube type
-
- 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
- F16F9/3207—Constructional features
- F16F9/3214—Constructional features of pistons
-
- 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
- F16F9/38—Covers for protection or appearance
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention discloses a shock absorber capable of prolonging the service life, which relates to the field of automobile shock absorbers and aims to solve the problem that the traditional limitable shock absorber is short in service life, and the technical scheme is as follows: the hydraulic oil storage device comprises an oil storage cylinder, a dust cover which is covered at one end of the oil storage cylinder, and a piston rod which penetrates through the end part of the oil storage cylinder and is fixedly connected to the middle part of the dust cover, wherein one end of the piston rod, which extends into the oil storage cylinder, is connected with a piston, a guide assembly is fixedly arranged inside the end part, which is close to the dust cover, of the oil storage cylinder, and a hydraulic limiting assembly is arranged at one end, which faces the piston, of. According to the shock absorber capable of prolonging the service life, the traditional hard collision is changed into hydraulic limiting, the approximately closed cavity is formed between the locking ring and the guider, the hydraulic limiting on the locking ring is realized by using the oil pressure in the cavity, the hard collision on the guider is reduced, and the service life of the shock absorber is effectively prolonged.
Description
Technical Field
The invention relates to the technical field of shock absorbers, in particular to a shock absorber capable of prolonging the service life.
Background
When the automobile passes through the uneven road surface, although the shock absorption spring in the shock absorption system can filter the shock of the road surface, the spring can still do reciprocating motion, and the shock absorber is used for inhibiting the spring from jumping back and forth. The shock absorber has the structure that a piston rod with a piston is inserted into a cylinder, the cylinder is filled with oil, and the piston is provided with a throttling hole, so that the oil in two parts of spaces divided by the piston can be supplemented with each other.
The working principle of the shock absorber is that when the relative motion occurs when the vehicle frame and the vehicle axle or the vehicle body and the vehicle axle are vibrated, the piston in the shock absorber moves up and down, oil in the cavity of the shock absorber repeatedly flows into the other cavity from one cavity through different gaps, and at the moment, the friction between the hole wall and the oil and the internal friction between oil molecules form damping force on the vibration, so that the vibration energy of the vehicle is converted into oil heat energy, and then the oil heat energy is absorbed by the shock absorber and dissipated into the atmosphere. The guider is one of important parts in the shock absorber, plays a good role in guiding the movement of a piston rod in the shock absorber, ensures the smoothness of the piston in the operation process, and simultaneously communicates the working cylinder with the oil storage cylinder through an oil hole of the guider in the movement process of the piston.
The existing shock absorber generally has two forms for limiting a piston rod, one is that a limiting block is arranged on the piston rod, most of shock absorber limiting blocks for vehicles are columnar rubber pieces, and the waist is in a simple straight wall state, so that if the hardness is set to be too high, sharp collision abnormal sound can occur during impact limiting, if the hardness is set to be too low, the displacement amount is too large during limiting, and the shock absorber limiting block is easy to break at the straight wall of the waist; the other is that the limit is realized by hard collision between the piston and the guider, and the mode can cause larger damage to the guider, thereby reducing the service life of the guider.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a shock absorber with the service life prolonged, which has the advantages of reducing the abrasion of a guider and prolonging the service life.
The above object of the present invention is achieved by the following technical solutions:
the utility model provides a but increase of service life's bumper shock absorber, includes that oil storage cylinder, cover locate the dust cover of oil storage cylinder one end, wear to locate oil storage cylinder tip and fixed connection in the piston rod at dust cover middle part, the one end that the piston rod stretched into oil storage cylinder is connected with the piston, the oil storage cylinder is close to the inside fixed direction subassembly that is provided with of tip of dust cover, the direction subassembly is provided with the spacing subassembly of hydraulic towards the one end of piston.
Through adopting above-mentioned technical scheme, when the bumper shock absorber during operation, the piston rod slides from top to bottom for the realization of oil storage cylinder, when the piston rod drives the piston and moves to when being close to towards the direction of direction subassembly, realizes hydraulic spacing to the piston rod through the spacing subassembly of hydraulic, avoids the direct hard collision of piston and director, and it is spacing to turn into hydraulic pressure with hard collision to reduce the wearing and tearing to direction subassembly, increase of service life.
The invention is further configured to: the direction subassembly includes that fixed connection is close to the director of dust cover one end in an oil storage section of thick bamboo, the through-hole that supplies the piston rod to pass is seted up to the director, the through-hole inner wall is provided with oilless bearing, the one end that the director deviates from the piston is provided with the oil blanket.
Through adopting above-mentioned technical scheme, the piston rod slides and wears to establish in the through-hole and can take place axial displacement for the director, can improve the degree of lubrication between piston rod and the director through oilless bearing, can avoid the oil in the oil storage section of thick bamboo to flow through the clearance between oilless bearing and the piston rod through the oil blanket, plays certain sealed effect.
The invention is further configured to: the spacing subassembly of hydraulic is including offering in the director towards piston one end and being columniform dashpot, the dashpot diameter is greater than the diameter of through-hole, the fixed cover of piston rod is equipped with the locking circle with dashpot inner wall matched with, the diameter of locking circle is 0.2mm less than the diameter of dashpot.
By adopting the technical scheme, when the piston rod is in a stretching state, the locking ring is driven to move towards the direction of the guider, and the diameter of the locking ring is slightly smaller than that of the buffer groove and is coaxially arranged, so that the locking ring is firstly embedded into the buffer groove, and the gap between the side wall of the locking ring and the inner wall of the buffer groove is 0.1mm at the moment; on the other hand is back in the locking circle gets into the dashpot, and the locking circle forms approximate confined cavity with the director in the dashpot, and along with the locking circle removes the increase that gets into the dashpot degree, and the hydraulic pressure force in the cavity increases gradually to exert the resistance to the locking circle, realize spacingly to the locking circle.
The invention is further configured to: the diameter of one end that the piston rod is used for installing the piston is less than the diameter of piston rod and director cooperation one end, and the locking ring cup joints in the less part of piston rod diameter and butt in the shaft shoulder lateral wall of piston rod, the annular of stairstepping is seted up to the one end that the locking ring deviates from the shaft shoulder, be provided with in the annular and be used for the fixed steel wire retaining ring to the locking ring.
Through adopting above-mentioned technical scheme, realize axial positioning through shaft shoulder and steel wire retaining ring to the locking circle, when the piston rod compression, the shaft shoulder is to the locking circle application of force, and when the piston rod was tensile, the steel wire retaining ring was to the locking circle application of force to guarantee the rigidity of locking circle.
The invention is further configured to: the shape of dashpot is round platform shape, and the diameter of dashpot diminishes from outside to inside gradually, the locking ring shape suits with the dashpot, and the clearance between locking ring and the dashpot is 0.1 mm.
Through adopting above-mentioned technical scheme, the piston rod drives the locking circle and removes towards the director, and when the locking circle got into the dashpot, at first the less one end of locking circle diameter got into the great one end of dashpot diameter, and fluid is less to the resistance of locking circle this moment, and along with the locking circle continues to move, the clearance between locking circle lateral wall and the dashpot inner wall is more and more littleer to make fluid also crescent to the resistance of locking circle, until with the complete spacing stop of locking circle. The mode has the advantages that the limiting effect on the locking ring is softer, the effect is gradually enhanced from small to large, the buffering performance is good, the comfort level of the vehicle body can be improved, and the driving stability is improved.
The invention is further configured to: the lateral wall of dashpot is the stairstepping setting, locking ring lateral wall be with dashpot complex stairstepping setting, and the clearance between locking ring and the dashpot inner wall is 0.1 mm.
Through adopting above-mentioned technical scheme, when the piston rod drives the locking circle and removes towards the director, the clearance that forms between locking circle lateral wall and the dashpot inner wall also is the stairstepping, compare with the clearance in embodiment one, its fluid flow resistance is bigger, and the stairstepping has the kink, when the kink of locking circle and the kink butt of dashpot inner wall, form sealed environment more easily, thereby make the cavity leakproofness that forms between locking circle and the director better, when the cavity volume diminishes like this, realize spacingly through the oil pressure in the cavity to the locking circle application of force.
The invention is further configured to: the oil seal is characterized in that the guider is provided with an oil return hole, one end of the oil return hole is communicated with the end part of the oil seal, and the other end of the oil return hole is communicated with the outer cylinder of the oil storage cylinder.
Through adopting above-mentioned technical scheme, when the locking circle removed towards the director, a small amount of oil in the dashpot received pressure and can enter into the cavity that is used for installing the oil blanket through oilless bearing's clearance, can discharge this part fluid into the urceolus of oil storage section of thick bamboo through the oil gallery, realizes the fluid backward flow. And the oil quantity passing through the clearance of the oilless bearing is very small, and the resistance of the oil pressure in the buffer groove to the locking ring can not be influenced.
The invention is further configured to: the locking ring is provided with the sealing ring of making by elastic material towards the one end of director, the width of sealing ring equals the width of dashpot, and is used for supporting tightly in oilless bearing.
Through adopting above-mentioned technical scheme, when the piston rod drives the locking circle and removes towards the director, the tip of sealing ring at first gets into the dashpot and supports tightly with oilless bearing's tip, thereby realize sealedly to oilless bearing's tip, simultaneously because the sealing ring is made by elastic material, through compressing the sealing ring, the locking circle can continue to remove to the dashpot, and the pressure between sealing ring and the oilless bearing strengthens gradually, when the dashpot internal oil pressure is bigger and bigger, can prevent that fluid from flowing from oilless bearing's clearance, thereby guarantee the leakproofness of dashpot and strengthen the spacing effect of the internal oil pressure of dashpot. The sealing ring material here can be rubber, and the elasticity and the leakproofness of rubber are all preferred, can satisfy sealed effect.
In conclusion, the beneficial technical effects of the invention are as follows:
1. when the piston rod drives the piston to move towards the direction of the guide assembly to approach, hydraulic limiting is realized on the piston rod through the hydraulic limiting assembly, direct hard collision between the piston and the guider is avoided, and the hard collision is converted into hydraulic limiting, so that the abrasion on the guide assembly is reduced, and the service life is prolonged;
2. when the piston rod is in a stretching state, the locking ring is driven to move towards the direction of the guider, and the diameter of the locking ring is slightly smaller than that of the buffer groove and is coaxially arranged, so that the locking ring is firstly embedded into the buffer groove, and at the moment, the gap between the side wall of the locking ring and the inner wall of the buffer groove is 0.1mm, and the oil in the oil storage cylinder has certain damping force, so that the resistance is larger when the oil flows in a tiny gap, and the resistance is applied to the locking ring to a certain extent; on the other hand, after the locking ring enters the buffer groove, an approximately closed cavity is formed in the buffer groove by the locking ring and the guider, and the oil pressure in the cavity is gradually increased along with the increase of the degree of the locking ring entering the buffer groove, so that resistance is applied to the locking ring, and the locking ring is limited;
3. the shape of dashpot is round platform shape, and the piston rod drives the locking circle and removes towards the director, and when the locking circle got into the dashpot, at first the less one end of locking circle diameter got into the great one end of dashpot diameter, and fluid is less to the resistance of locking circle this moment, and along with the locking circle continues to move, the clearance between locking circle lateral wall and the dashpot inner wall is more and more littleer to make fluid also crescent to the resistance of locking circle, until stopping the locking circle spacing completely. The mode has the advantages that the limiting effect on the locking ring is softer, the effect is gradually enhanced from small to large, the buffering performance is good, the comfort level of the vehicle body can be improved, and the driving stability is improved.
Drawings
Fig. 1 is a schematic overall structure diagram of a first embodiment of the present invention.
Fig. 2 is a partial structural schematic diagram of the present invention.
Fig. 3 is a schematic structural diagram of a second embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a third embodiment of the present invention.
In the figure, 1, an oil storage cylinder; 2. a dust cover; 3. a piston rod; 4. a piston; 5. a guide assembly; 6. a hydraulic limiting component; 7. a guide; 8. a through hole; 9. an oilless bearing; 10. oil sealing; 11. a buffer tank; 12. a locking ring; 13. a ring groove; 14. a steel wire retainer ring; 15. an oil return hole; 16. and (4) a sealing ring.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example one
Referring to fig. 1 and 2, the shock absorber capable of prolonging the service life disclosed by the invention comprises an oil storage cylinder 1, a dust cover 2 covering one end of the oil storage cylinder 1, and a piston rod 3 penetrating through the end of the oil storage cylinder 1 and fixedly connected to the middle part of the dust cover 2, wherein one end of the piston rod 3 extending into the oil storage cylinder 1 is connected with a piston 4, a guide component 5 is fixedly arranged at the position of the oil storage cylinder 1, which is close to the end of the dust cover 2 and is positioned in the oil storage cylinder 1, and one end of the guide component 5 facing the piston 4 is provided with a hydraulic limiting component 6; when the bumper shock absorber during operation, piston rod 3 slides from top to bottom for oil storage cylinder 1 realizes, when piston rod 3 drove piston 4 and move to being close to towards 5 directions of direction subassembly, realizes hydraulic spacing through hydraulic spacing subassembly 6 to piston rod 3, avoids piston 4 and director 7's direct hard collision, and it is spacing to turn into hydraulic pressure with hard collision to reduce the wearing and tearing to direction subassembly 5, increase of service life.
As shown in fig. 2, the guide assembly 5 comprises a guide 7 fixedly connected to one end of the oil storage cylinder 1 close to the dust cover 2, a through hole 8 for the piston rod 3 to pass through is formed in the center of the guide 7, an oilless bearing 9 is arranged on the inner wall of the through hole 8, and an oil seal 10 is arranged at one end of the guide 7 away from the piston 4; the piston rod 3 is slidably arranged in the through hole 8 in a penetrating mode and can move axially relative to the guider 7, the lubrication degree between the piston rod 3 and the guider 7 can be improved through the oilless bearing 9, oil in the oil storage cylinder 1 can be prevented from flowing out through a gap between the oilless bearing 9 and the piston rod 3 through the oil seal 10, and a certain sealing effect is achieved.
As shown in fig. 1 and 2, the hydraulic limiting component 6 includes a buffer groove 11 which is provided at one end of the guider 7 facing the piston 4 and is cylindrical, the diameter of the buffer groove 11 is larger than that of the through hole 8, the piston rod 3 is fixedly sleeved with a locking ring 12 which is matched with the inner wall of the buffer groove 11, the position of the locking ring 12 on the piston rod 3 can be positioned according to actual requirements, and the diameter of the locking ring 12 is 0.2mm smaller than that of the buffer groove 11; when the piston rod 3 is in a stretching state, the locking ring 12 is driven to move towards the direction of the guider 7, and as the diameter of the locking ring 12 is slightly smaller than that of the buffer groove 11 and is coaxially arranged, the locking ring 12 is firstly embedded into the buffer groove 11, and the gap between the side wall of the locking ring 12 and the inner wall of the buffer groove 11 is 0.1mm at the moment, and as the oil in the oil storage cylinder 1 has certain damping force, the resistance is larger when the oil flows in a small gap, so that the resistance is applied to the locking ring 12 to a certain extent, and the effect of taking the gap to be 0.1mm is optimal after a plurality of tests; on the other hand, after the locking ring 12 enters the buffer groove 11, the locking ring 12 and the guider 7 form an approximately closed cavity in the buffer groove 11, and along with the increase of the degree that the locking ring 12 moves to enter the buffer groove 11, the oil pressure in the cavity is gradually increased, so that resistance is applied to the locking ring 12, and the locking ring 12 is limited.
As shown in fig. 3, the diameter of one end of the piston rod 3 for mounting the piston 4 is smaller than the diameter of the end of the piston rod 3 matched with the guider 7, so that a shaft shoulder is formed at the diameter change position of the side wall of the piston rod 3, the locking ring 12 is sleeved on the part of the piston rod 3 with smaller diameter and abuts against the side wall of the shaft shoulder of the piston rod 3, a stepped annular groove 13 is formed at one end of the locking ring 12 departing from the shaft shoulder, and a steel wire retainer ring 14 for fixing the locking ring 12 is arranged in the annular groove 13; axial positioning is realized on the locking ring 12 through the shaft shoulder and the steel wire retainer ring 14, when the piston rod 3 is compressed, the shaft shoulder applies force to the locking ring 12, and when the piston rod 3 is stretched, the steel wire retainer ring 14 applies force to the locking ring 12, so that the position of the locking ring 12 is ensured to be fixed.
Because a certain cavity is inevitably generated at the end part of the oil seal 10 when the oil seal 10 is installed, an oil return hole 15 is also formed on the guider 7, one end of the oil return hole 15 is communicated with the cavity at the end part of the oil seal 10, and the other end is communicated with the outer cylinder of the oil storage cylinder 1; when the locking ring 12 moves towards the guider 7, a small amount of oil in the buffer groove 11 is pressurized and enters a cavity for installing the oil seal 10 through a gap of the oilless bearing 9, and the oil can be discharged into the outer cylinder of the oil storage cylinder 1 through the oil return hole 15, so that the oil can flow back. And the oil amount passing through the gap of the oilless bearing 9 is very small, and the resistance of the oil pressure in the buffer groove 11 to the locking ring 12 is not influenced.
Example two
Referring to fig. 3, the damper capable of prolonging the service life disclosed by the present invention is different from the first embodiment in that: the shape of buffer slot 11 is round platform shape, and the diameter of buffer slot 11 diminishes from outside to inside gradually, and its diameter diminishes gradually to keeping away from lock ring 12 one end from being close to lock ring 12 promptly, and lock ring 12 shape and buffer slot 11 suit, and the clearance between lock ring 12 and the buffer slot 11 is 0.1 mm.
The piston rod 3 drives the locking ring 12 to move towards the guider 7, when the locking ring 12 enters the buffer groove 11, the smaller end of the diameter of the locking ring 12 firstly enters the larger end of the diameter of the buffer groove 11, the resistance of the oil to the locking ring 12 is smaller at the moment, the clearance between the side wall of the locking ring 12 and the inner wall of the buffer groove 11 is smaller and smaller along with the continuous movement of the locking ring 12, and therefore the resistance of the oil to the locking ring 12 is gradually increased until the locking ring 12 is completely stopped in a limiting mode. The mode has the advantages that the limiting effect on the locking ring 12 is softer, the gradual enhancement from small to large is realized, the buffering performance is good, the comfort level of the vehicle body can be improved, and the running stability is improved.
One end of the locking ring 12 facing the guider 7 is provided with a sealing ring 16 made of elastic material, the sealing ring 16 surrounds the circumference of the piston rod 3 and can slide, the width of the sealing ring 16 is equal to that of the buffer groove 11 and is used for abutting against the oilless bearing 9; when piston rod 3 drives locking ring 12 and moves towards director 7, the tip of sealing ring 16 at first gets into dashpot 11 and supports tightly with oilless bearing 9's tip, thereby it is sealed to the tip realization of oilless bearing 9, simultaneously because sealing ring 16 is made by elastic material, through compressing sealing ring 16, locking ring 12 can continue to remove in dashpot 11, and pressure between sealing ring 16 and the oilless bearing 9 strengthens gradually, when 11 interior oil pressure of dashpot are bigger and bigger, can prevent that fluid from flowing out from oilless bearing 9's clearance, thereby guarantee 11 leakproofness of dashpot 11 reinforcing 11 interior oil pressure spacing effect. The material of the sealing ring 16 may be rubber, which has good elasticity and sealing performance, and can satisfy the sealing effect.
EXAMPLE III
Referring to fig. 4, the damper capable of prolonging the service life disclosed by the present invention is different from the first embodiment in that: the lateral wall of buffer slot 11 is the stairstepping setting, and locking ring 12 lateral wall is the stairstepping setting with buffer slot 11 complex, and the clearance between locking ring 12 and the buffer slot 11 inner wall is 0.1 mm.
When piston rod 3 drove locking ring 12 and moved towards director 7, the clearance that forms between locking ring 12 lateral wall and the 11 inner walls of dashpot also is the stairstepping, compare with the clearance in embodiment one, its fluid flow resistance is bigger, and the stairstepping has the kink, when the kink of locking ring 12 and the kink butt of dashpot 11 inner walls, form sealed environment more easily, thereby make the cavity leakproofness that forms between locking ring 12 and the director 7 better, when the cavity volume diminishes like this, realize spacingly through the oil pressure in the cavity to locking ring 12 application of force.
Through the three embodiments, the hard collision between the locking ring 12 and the guider 7 is changed into hydraulic limiting locking, so that the collision damage to the guider 7 is reduced, and the service life of the guider 7 is prolonged.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (1)
1. A shock absorber with a service life prolonged is characterized in that: the hydraulic oil storage device comprises an oil storage cylinder (1), a dust cover (2) covered at one end of the oil storage cylinder (1), and a piston rod (3) which penetrates through the end part of the oil storage cylinder (1) and is fixedly connected to the middle part of the dust cover (2), wherein one end of the piston rod (3) extending into the oil storage cylinder (1) is connected with a piston (4), a guide component (5) is fixedly arranged inside the end part of the oil storage cylinder (1) close to the dust cover (2), and one end of the guide component (5) facing the piston (4) is provided with a hydraulic limiting component (6); the guide assembly (5) comprises a guider (7) fixedly connected to one end, close to the dust cover (2), of the oil storage cylinder (1), the guider (7) is provided with a through hole (8) through which the piston rod (3) penetrates, an oilless bearing (9) is arranged on the inner wall of the through hole (8), and one end, away from the piston (4), of the guider (7) is provided with an oil seal (10); the hydraulic limiting component (6) comprises a buffer groove (11) which is arranged at one end of the guider (7) facing the piston (4) and is cylindrical, or in a round table shape or a step shape, the diameter of the buffer groove (11) is larger than that of the through hole (8), a locking ring (12) matched with the inner wall of the buffer groove (11) is fixedly sleeved on the piston rod (3), and the diameter of the locking ring (12) is 0.2mm smaller than that of the buffer groove (11); the diameter of one end, used for installing a piston (4), of the piston rod (3) is smaller than that of the end, matched with the guider (7), of the piston rod (3), the locking ring (12) is sleeved on the portion, with the smaller diameter, of the piston rod (3) and abuts against the side wall of the shaft shoulder of the piston rod (3), a stepped annular groove (13) is formed in one end, away from the shaft shoulder, of the locking ring (12), and a steel wire check ring (14) used for fixing the locking ring (12) is arranged in the annular groove (13); when the side wall of the buffer groove (11) is arranged in a stepped manner, the side wall of the locking ring (12) is arranged in a stepped manner matched with the buffer groove (11), and the gap between the locking ring (12) and the inner wall of the buffer groove (11) is 0.1 mm; when the buffer groove (11) is in a circular truncated cone shape, the diameter of the buffer groove (11) is gradually reduced from outside to inside, the shape of the locking ring (12) is matched with that of the buffer groove (11), and the gap between the locking ring (12) and the buffer groove (11) is 0.1 mm; an oil return hole (15) is formed in the guider (7), one end of the oil return hole (15) is communicated with the end part of the oil seal (10), and the other end of the oil return hole (15) is communicated with the outer cylinder of the oil storage cylinder (1); the locking ring (12) is provided with sealing ring (16) made by elastic material towards the one end of director (7), the width of sealing ring (16) equals the width of dashpot (11), and is used for supporting tightly in oilless bearing (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811337340.8A CN109340296B (en) | 2018-11-12 | 2018-11-12 | Shock absorber capable of prolonging service life |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811337340.8A CN109340296B (en) | 2018-11-12 | 2018-11-12 | Shock absorber capable of prolonging service life |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109340296A CN109340296A (en) | 2019-02-15 |
| CN109340296B true CN109340296B (en) | 2020-12-29 |
Family
ID=65314481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811337340.8A Active CN109340296B (en) | 2018-11-12 | 2018-11-12 | Shock absorber capable of prolonging service life |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109340296B (en) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87203523U (en) * | 1987-03-14 | 1988-02-24 | 罗良祖 | High energy-accumulating vibration-damper for vehicles |
| JPH08291839A (en) * | 1995-04-20 | 1996-11-05 | Unisia Jecs Corp | Hydraulic damping device |
| CN1280554C (en) * | 2004-02-26 | 2006-10-18 | 范勇 | Damping device with two-rider for lubricating for automobile |
| JP2007205435A (en) * | 2006-01-31 | 2007-08-16 | Hitachi Ltd | Hydraulic shock absorber |
| CN103363007B (en) * | 2012-04-10 | 2016-09-21 | 浙江长进减震器有限公司 | Vibroshock, vehicle suspension system and vehicle |
| EP3019766A1 (en) * | 2013-07-12 | 2016-05-18 | Showa Corporation | Hydraulic shock absorber and cover member |
| CN203926570U (en) * | 2014-07-10 | 2014-11-05 | 宁波金恒汽车零部件有限公司 | The anti-washing structure of vibration damper |
| DE112016004157T5 (en) * | 2015-09-14 | 2018-06-14 | Hitachi Automotive Systems, Ltd. | shock absorber |
| CN107725658A (en) * | 2017-09-27 | 2018-02-23 | 中国舰船研究设计中心 | A kind of absorbing vibration isolation integrated apparatus |
-
2018
- 2018-11-12 CN CN201811337340.8A patent/CN109340296B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109340296A (en) | 2019-02-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107636344B (en) | Hydraulic damper for vehicle suspension | |
| US6918605B2 (en) | Inverted type front fork in two-wheeled vehicle or the like | |
| WO2017012112A1 (en) | Oil damper for train | |
| CN202756521U (en) | Hydraulic recovery and cushion shock absorber | |
| US12110945B2 (en) | Damper with hydraulic compression stop | |
| KR20140030194A (en) | Damper tube reinforcement sleeve | |
| EP0884499A1 (en) | Hydraulic shock absorber | |
| CN109667873A (en) | Using the damper of the double dampings of cascade double-piston and using the vehicle of the damper | |
| CN210769980U (en) | Buffer, shock absorber and vehicle | |
| CN109058353B (en) | Automobile shock absorber assembly | |
| CN207049242U (en) | A kind of car hydraulic tensioning snubber mechanism | |
| KR20210031077A (en) | Shock absorber for vehicle | |
| CN109340296B (en) | Shock absorber capable of prolonging service life | |
| US8701846B2 (en) | Inverted strut comprising an air damper combined with a hydraulic stop | |
| JP5539629B2 (en) | Piston cylinder assembly | |
| JP2007253921A (en) | Damper with vehicle height adjusting function and vehicle equipped with the damper | |
| CN109441990B (en) | Double-cylinder support type automobile shock absorber | |
| KR101272757B1 (en) | Shock absorber with a stopping structure using oil pressure | |
| RU2319620C1 (en) | Vehicle suspension pneumohydraulic spring | |
| CN108266484B (en) | A vehicle that is used for shock absorber of vehicle and has it | |
| CN208057798U (en) | A kind of vehicle shock absorber hydraulic buffering mechanism | |
| CN205689664U (en) | A kind of vibroshock of band compression buffering | |
| CN205689662U (en) | A kind of hydraulic pressure restores buffer structure | |
| KR20080106714A (en) | Stopper of shock absorber | |
| CN212804036U (en) | Suspension shock absorber structure of automobile chassis |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |