CN214404479U

CN214404479U - Gradual change formula stroke control damping shock absorber

Info

Publication number: CN214404479U
Application number: CN202022412017.1U
Authority: CN
Inventors: 胡兰; 葛文军; 李国华; 张勇; 李皓龙; 谢毅; 严茂; 凌洁
Original assignee: Chengdu Jiuding Technology Group Co Ltd
Current assignee: Chengdu Jiuding Technology Group Co Ltd
Priority date: 2020-10-26
Filing date: 2020-10-26
Publication date: 2021-10-15
Anticipated expiration: 2030-10-26

Abstract

The utility model discloses a gradual change formula stroke control damping shock absorber, including the working cylinder, set up the link assembly in the working cylinder and set up the bottom valve subassembly in the working cylinder bottom, the working cylinder includes working cylinder and reducing cylinder, the working cylinder diameter is greater than reducing cylinder diameter, be provided with the buffering subassembly on the link, the buffering subassembly when moving into reducing cylinder, with the sealed cooperation between the reducing cylinder inner wall; one or more drainage grooves are arranged on the inner wall of the reducing cylinder along the axial direction of the working cylinder, and one end of each drainage groove is positioned at the connecting part between the working cylinder and the reducing cylinder; the buffer component comprises a buffer seat, and a first oil drainage groove is arranged on the outer circumference of the buffer seat along the axial direction of the buffer seat. When the shock absorber is close to the maximum stretching stroke, the buffer assembly generates additional damping force, discomfort brought to passengers due to rigid impact is avoided, the riding comfort is improved, the safety of personnel and loading equipment is guaranteed, and the quality of the whole vehicle can be obviously improved.

Description

Gradual change formula stroke control damping shock absorber

Technical Field

The utility model relates to a shock absorber technical field, in particular to damping shock absorber is adjusted to gradual change formula stroke.

Background

With the increasing requirements on the performances of the automotive suspension, active variable damping shock absorbers, semi-active suspension shock absorbers and passive modified shock absorbers (air spring shock absorbers and special hydraulic structure shock absorbers) have come into force, but the shock absorbers have the problems of complex structure, high production cost and the like, and cannot be widely used.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the above-mentioned technical problem that shock absorber exists among the prior art, provide a damping shock absorber is adjusted to gradual change formula stroke.

In order to solve the technical problem, the utility model discloses a technical scheme as follows:

a gradual change type stroke adjustment damping shock absorber comprises a working cylinder, a connecting rod assembly arranged in the working cylinder and a bottom valve assembly arranged at the bottom of the working cylinder, wherein the connecting rod assembly comprises a connecting rod and a piston arranged at the end part of the connecting rod;

one or more drainage grooves are formed in the inner wall of the reducing cylinder along the axial direction of the working cylinder, and one end of each drainage groove is located at the connecting position between the working cylinder and the reducing cylinder;

the buffer component comprises a buffer seat, and a first oil drainage groove is formed in the outer circumference of the buffer seat along the axial direction of the buffer seat.

In the technical scheme, furthermore, the buffer assembly further comprises a supporting seat, two annular limiting flanges are oppositely arranged on the supporting seat, an annular limiting groove is formed between the limiting flanges, the buffer seat is sleeved in the limiting groove of the supporting seat, the outer diameter of the buffer seat is larger than that of the limiting flanges, and the buffer seat and the supporting seat are in clearance fit.

In the above technical scheme, further, the distance between the limiting flanges is greater than the distance between the two end faces of the buffer seat.

Among the above-mentioned technical scheme, furtherly, the buffing pad includes the buffing pad body, buffing pad body both ends swing joint forms the loop configuration, first draining groove is located the outer circumference of buffing pad body, a buffing pad body side end face is the plane, is provided with one or more second draining grooves on the terminal surface of another side end, the second draining groove is located towards the terminal surface of reducing section of thick bamboo one side.

In the above technical scheme, further, buffer base body both ends are provided with the complex pothook respectively, buffer base body both ends are through pothook swing joint, and one side position that is located buffer base body one end pothook is provided with spacing portion, spacing portion is used for restricting the motion of another pothook towards spacing portion direction, spacing portion is located one side of keeping away from the second draining groove on the buffer base body.

In the above technical scheme, further, the first oil drainage groove is located at a joint of two ends of the buffer base body, and the first oil drainage groove is formed between the hook at one end of the buffer base body and the hook at the other end of the buffer base body.

In the above technical scheme, furthermore, be provided with one or more third draining grooves on the circumference in the cushion seat body, the interval setting that staggers between second draining groove and the third draining groove.

In the above technical solution, further, the projection area of the drainage groove on the vertical plane is gradually reduced along the stretching direction of the connecting rod assembly.

Among the above-mentioned technical scheme, furtherly, the chute cross section is the arc, and the interval between chute bottom and the reducing section of thick bamboo inner wall reduces along the tensile direction of link assembly gradually on the chute longitudinal section.

In the above technical scheme, further, the drainage groove and the first oil drainage groove are arranged in a staggered manner.

The utility model discloses the beneficial effect who has:

1) the shock absorber just begins work when entering into a reducing section of thick bamboo in tensile stroke, provides extra damping force at the tensile stroke in-process of shock absorber, and at compression stroke, can realize quick draining between buffer assembly and the reducing section of thick bamboo to avoid the production of extra damping force, thereby can not influence the performance of shock absorber under normal road surface, can solve the problem that current shock absorber exists under the special road conditions pertinence.

2) Compared with the traditional passive shock absorber, the shock absorber of the utility model has less change on the original structure, and can be put into production by adjusting on the basis of the original production process, thereby effectively reducing the processing cost; impact load in the running process can be effectively reduced, abrasion is reduced, and use economy is improved; meanwhile, the grounding performance of the tire can be improved, high-speed running jumping is inhibited, and the running safety is improved; the vehicle can improve the operation stability when accelerating suddenly, braking suddenly and turning suddenly, has good effects on the stability and comfort of the vehicle, the service life of vehicle parts and the driving safety, and has good market prospect.

3) This damping shock absorber is adjusted to gradual change formula stroke can be relatively poor in the road conditions, jolt more the time automatic absorption energy, avoid the rigidity to strike and bring the discomfort for the passenger to improve the riding comfort, guarantee personnel and load the safety of equipment, can obviously promote whole car quality, accord with the trend of automobile market demand development.

4) The gradually-changing additional damping force generated by the shock absorber can counteract the inertia force of the piston so as to achieve the aim of decelerating and braking the piston rod assembly and prevent rigid collision between a guider in the shock absorber and the buffer rubber sleeve and the supporting seat; and the impact energy between the shock absorber and the vehicle body is converted into heat energy and attenuated, so that the running smoothness of the vehicle under a complex working condition is improved, and the riding comfort of the vehicle is improved.

5) The shock absorber can provide comfortable and stable shock absorption effect for an automobile on a rugged road, the damage of wheels caused in the falling process is small, the anti-fatigue capability of a vehicle chassis can be effectively improved, the risk of bending/deformation of the vehicle chassis structure is reduced, the service life of automobile parts is prolonged, the suspension noise is reduced, and the problems of unbalance (turning) of the automobile or jumping (breaking) of a rear axle and the like are avoided.

6) The shock absorber has simple structure and low cost, can be suitable for various vehicle types and is suitable for market volume production; and the abnormal sound problem can be effectively solved, and the quality of the shock absorber is improved.

7) By arranging the drainage groove on the working cylinder of the shock absorber and combining the structural design of the drainage groove, the magnitude of the additional damping force can be smoothly transited in the generation process of the additional damping, and sudden change of the damping force is avoided, so that the performance of the shock absorber is further improved.

Drawings

Fig. 1 is a schematic structural view of the shock absorber of the present invention.

Fig. 2 is a schematic structural view of the middle buffer assembly of the present invention.

Fig. 3 is a schematic cross-sectional view of the middle buffering assembly of the present invention.

Fig. 4 is a schematic view of the structure of the middle buffer seat of the present invention.

Fig. 5 is a schematic structural view of the middle working cylinder of the present invention.

Fig. 6 is a schematic sectional view taken along line a-a in fig. 5.

In the figure:

100. an oil cylinder 200, a bottom valve assembly;

300. the device comprises a working cylinder 301, a working cylinder 302, a reducing cylinder 303, a transition section 304 and a drainage groove;

401. connecting rod, 402, piston;

500. the buffer component comprises a buffer seat 501, a buffer seat 511, a buffer seat body 512, a first oil drainage groove 513, a second oil drainage groove 514, a third oil drainage groove 515, a clamping hook 516, a limiting part 502, a supporting seat 521, a limiting flange 522 and a limiting groove.

Detailed Description

The invention will be further described with reference to the accompanying drawings and specific embodiments.

The utility model provides a damping shock absorber is adjusted to gradual change formula stroke comes the change of adaptation road conditions through inner structure in order to adjust the damping size, need not external control ware, and the function is between passive form and active, provides the preferred structure of this shock absorber in this embodiment, specifically as follows:

as shown in fig. 1, the gradual-change stroke-adjusting damping shock absorber includes an oil cylinder assembly, a working cylinder 300, a connecting rod assembly disposed in the working cylinder, and a bottom valve assembly 200 disposed at an end of the working cylinder, wherein the connecting rod assembly includes a connecting rod 401 and a piston 402 disposed at an end of the connecting rod, the oil cylinder assembly includes a spring tray, a cover cap and an oil cylinder 100, and the working cylinder 300 is disposed in the oil cylinder 100.

Referring to fig. 1 and 5, the working cylinder 300 in this embodiment comprises a working barrel 301 and a reducing barrel 302, wherein the diameter of the working barrel 301 is larger than that of the reducing barrel 302, and an arc-shaped transition section 303 is arranged between the working barrel and the reducing barrel, so that a smooth transition structure is formed at the joint between the working barrel and the reducing barrel.

One or more drain grooves 304, preferably a plurality of drain grooves 304, are provided on the inner wall of the reducing cylinder 302 in the axial direction of the cylinder, and the plurality of drain grooves 304 are uniformly arranged on the inner wall of the reducing cylinder 302 in the circumferential direction thereof.

The drainage groove 304 has one end located at the connection between the working cylinder and the reducing cylinder, i.e. at the transition section 303 of the working cylinder 300, and the other end located away from the transition section. The structure of the chute has been optimized in this embodiment, and the concrete structure is:

as shown in fig. 5, the projected area of the drainage groove 304 on the vertical plane gradually decreases along the stretching direction of the connecting rod assembly; further, as shown in FIG. 6, the cross-section of the chute 304 is curved, making the bottom of the chute an arc-shaped surface. Wherein, on any longitudinal section, the distance between the bottom of the drainage groove 304 and the inner wall of the reducing cylinder is gradually reduced in the direction far away from the transition section; therefore, the cross-sectional area of the flow discharge groove is gradually reduced along the stretching direction of the connecting rod assembly, the flow discharge groove can play a good balance buffering role while playing a flow discharge role, and the generated additional damping force can have a smooth transition process when the buffering assembly enters the reducing cylinder, so that the performance of the shock absorber is further improved.

Through carrying out optimal design to the structure of earial drainage groove, at tensile stroke, the buffer unit is more to the left movement at the reducing section of thick bamboo, and the sectional area of earial drainage groove is littleer, and its earial drainage effect will reduce gradually, makes the additional damping force size of production obtain smooth transition, avoids the sudden change of damping force to improve the performance of shock absorber.

Referring to fig. 2 and 3, the damping assembly 500 in this embodiment includes a damping mount 501 and a support mount 502, and the support mount 502 is fixedly secured to the connecting rod 401 so that the damping assembly can move with the connecting rod in the cylinder. The last relative two annular limiting flange 521 that are provided with of bearing 502, it is annular spacing groove 522 to form between two limiting flange 521, buffer seat 501 cover is established on bearing 502 and is located in the spacing groove 522, buffer seat 501 external diameter is greater than limiting flange 521's external diameter, and when buffer assembly moved to a reducing section of thick bamboo, sealed cooperation can be formed between buffer seat and the reducing section of thick bamboo inner wall.

As shown in fig. 4, the buffer seat 501 in the present embodiment includes a buffer seat body 511, and two ends of the buffer seat body 511 are movably connected to form an annular structure; a first oil drainage groove 512 for oil supply to drain oil is arranged on the outer circumference of the buffer seat body 511. One side end face of the buffer seat body 511 is a plane, and the other side end face is provided with a plurality of second oil drainage grooves 513, wherein the second oil drainage grooves 513 are positioned on the end face facing one side of the reducing cylinder. The second oil drainage grooves 513 are uniformly distributed on the end face of the buffer base body along the axis of the buffer base, and the plurality of second oil drainage grooves 513 form a plurality of square notch groove structures on the buffer base body.

In this embodiment, the two ends of the buffer base body 511 are respectively provided with a hook 515 structure, and the two ends of the buffer base body are movably connected through the hook 515 structure. A limiting part 516 is arranged at one side of the hook 515 at one end of the buffer seat body 511, the limiting part 516 is a raised step structure, the limiting part 516 is used for limiting the movement of the other hook 515 towards the limiting part, and the limiting part 516 is arranged at one side of the buffer seat body far away from the second oil drainage groove, namely, towards one side of the buffer seat moving in the compression stroke direction.

First draining groove 512 is located the junction at cushion seat body both ends, form first draining groove 512 between the pothook of cushion seat body one end and the pothook of the other end, make the structure of cushion seat simpler, the cushion seat shaping is convenient.

A plurality of third oil drainage grooves 514 are formed in the inner circumference of the buffer seat body 511, and the third oil drainage grooves 514 are uniformly distributed on the inner circumference of the buffer seat body along the axis of the buffer seat. The second oil drainage groove 513 and the third oil drainage groove 514 on the buffer base body are respectively arranged at staggered intervals. Set up the fluid flow area of multiplicable buffering subassembly when compression stroke of third draining groove on the circumference of the buffering seat body, increase the oil mass, make the buffering subassembly can possess better effect.

The distance between the two limiting flanges 521 is larger than the distance between the two end faces of the buffer seat body 511, so that when the buffer seat assembly moves in the shock absorber, the buffer seat can move in the limiting groove along the axial direction of the supporting seat. Meanwhile, the two ends of the buffer seat are movably connected by the hooks in a hanging type structure, so that the buffer seat can further conveniently move in the limiting groove on the supporting seat, the buffer assembly can respectively play different roles in a stretching stroke and a compression stroke, different effects are realized, and the performance of the shock absorber is realized.

In this embodiment, the buffer seat 501 and the supporting seat 502 are in clearance fit, so that a certain clearance for oil to pass through is formed between the buffer seat and the supporting seat.

When the shock absorber receives tensile effect, link assembly moves left, and when the buffer unit entered into the undergauge position of working cylinder, the buffer seat moved right on the bearing under the effect of working cylinder, and the cooperation between buffer seat terminal surface and the spacing flange, closely cooperate between buffer seat and the working cylinder, the fluid in the working cylinder undergauge section of thick bamboo only carries out the draining through first draining groove, earial drainage groove this moment to produce additional damping force to link assembly, increase the damping of shock absorber at tensile stroke.

When the shock absorber receives the compression effect, the connecting rod assembly moves rightwards, the buffer seat moves leftwards on the supporting seat under the action of the working cylinder, one end of the buffer seat, which is provided with the second oil drainage groove, is matched with the limiting flange on the other side, and oil can be drained through the third oil drainage groove, a gap between the buffer seat and the supporting seat, the second oil drainage groove and the first oil drainage groove, so that quick oil drainage in a compression stroke is realized, and extra damping force is prevented from being generated in the compression stroke.

The working process and the action principle of the shock absorber in the embodiment are as follows:

when the shock absorber is subjected to stretching action, the connecting rod assembly moves leftwards, and the buffer assembly does not enter the reducing cylinder of the working cylinder, the action of the shock absorber is the same as the stretching stroke principle of other passive shock absorbers, namely the oil pressure of the upper cavity of the working cylinder is increased, and the oil in the upper cavity flows into the lower cavity through the piston throttling hole; because of the existence of the connecting rod, the oil flowing from the upper cavity is not enough to fill the increased volume of the lower cavity, and under the action of pressure difference, the oil in the oil cylinder liquid storage chamber pushes the bottom valve plate to flow into the lower cavity of the working cylinder through the normally through hole on the bottom valve component.

The shock absorber continues to stretch, the connecting rod assembly continues to move outwards, when the buffer assembly enters the reducing cylinder of the working cylinder, due to the fact that the inner diameter of the working cylinder is reduced, the buffer seat is in sealing fit with the inner wall of the reducing cylinder, oil in the reducing cylinder of the working cylinder can only be discharged through the discharge groove and the first oil drainage groove, additional damping force is generated, and stretching damping of the shock absorber is increased.

When the shock absorber is under pressure, the working principle of the shock absorber is consistent with the compression process of the existing double-cylinder hydraulic structure, and the details are not repeated here.

That is, the shock absorber has the characteristics that extra additional damping force can be generated in the extension stroke, the extension damping of the shock absorber is increased, and no extra additional damping force exists in the compression stroke; when the shock absorber is close to the maximum stretching stroke, the buffer assembly generates additional damping force, discomfort brought to passengers due to rigid impact is avoided, the riding comfort is improved, the safety of personnel and loading equipment is guaranteed, and the quality of the whole vehicle can be obviously improved.

The present invention is not limited to the above description and drawings, but should be understood as being illustrative and not restrictive, and the technical features can be replaced and modified without creative efforts by those skilled in the art according to the technical content disclosed, all falling within the scope of the present invention.

Claims

1. The utility model provides a damping shock absorber is adjusted to gradual change formula stroke, includes the working cylinder, sets up the link assembly in the working cylinder and sets up the bottom valve subassembly in the working cylinder bottom, link assembly includes the connecting rod and sets up the piston at the connecting rod tip, its characterized in that: the working cylinder comprises a working cylinder and a reducing cylinder, the diameter of the working cylinder is larger than that of the reducing cylinder, the connecting rod is provided with a buffer assembly, and the buffer assembly is in sealing fit with the inner wall of the reducing cylinder when moving into the reducing cylinder;

2. The progressive stroke tuned damping absorber according to claim 1, wherein: the buffer assembly further comprises a supporting seat, two annular limiting flanges are oppositely arranged on the supporting seat, an annular limiting groove is formed between the limiting flanges, the buffer seat is sleeved in the limiting groove of the supporting seat, the outer diameter of the buffer seat is larger than that of the limiting flanges, and the buffer seat and the supporting seat are in clearance fit.

3. The progressive stroke tuned damping absorber according to claim 2, wherein: the spacing between the limiting flanges is larger than the spacing between two end faces of the buffer seat.

4. The progressive stroke tuned damping absorber according to claim 2 or 3, wherein: the buffer seat comprises a buffer seat body, two ends of the buffer seat body are movably connected to form an annular structure, the first oil drainage groove is located on the outer circumference of the buffer seat body, one side end face of the buffer seat body is a plane, one or more second oil drainage grooves are formed in the end face of the other side of the buffer seat body, and the second oil drainage grooves are located on the end face of one side of the reducing cylinder.

5. The progressive stroke tuned damping absorber according to claim 4, wherein: the buffer seat comprises a buffer seat body and is characterized in that two ends of the buffer seat body are respectively provided with a matched clamping hook, the two ends of the buffer seat body are movably connected through the clamping hooks, a limiting part is arranged at one side position of the clamping hook at one end of the buffer seat body and used for limiting the movement of the other clamping hook towards the direction of the limiting part, and the limiting part is arranged at one side of the buffer seat body, which is far away from the second oil drainage groove.

6. The progressive stroke tuned damping absorber according to claim 5, wherein: the first oil drainage groove is located at the joint of the two ends of the buffer seat body, and a first oil drainage groove is formed between the clamping hook at one end of the buffer seat body and the clamping hook at the other end of the buffer seat body.

7. The progressive stroke tuned damping absorber according to claim 4, wherein: one or more third oil drainage grooves are formed in the inner circumference of the buffer seat body, and the second oil drainage grooves and the third oil drainage grooves are arranged in a staggered mode at intervals.

8. The progressive stroke tuned damping absorber according to claim 1, wherein: the projection area of the drainage groove on the vertical plane is gradually reduced along the stretching direction of the connecting rod assembly.

9. The progressive stroke tuned damping absorber according to claim 1 or 8, wherein: the cross section of the drainage groove is arc-shaped, and the distance between the bottom of the drainage groove and the inner wall of the reducing cylinder on the longitudinal section of the drainage groove is gradually reduced along the stretching direction of the connecting rod assembly.

10. The progressive stroke tuned damping absorber according to claim 1, wherein: the drainage groove and the first oil drainage groove are arranged in a staggered mode.