CN213064454U - Piston rod for vehicle shock absorber - Google Patents

Abstract

The utility model discloses a piston rod for a vehicle shock absorber, which comprises a connecting rod and a piston and is used for realizing the reciprocating motion of the shock absorber, wherein a sleeve matched with the piston rod is arranged on the shock absorber, a main spring is nested on the sleeve and the piston rod, one end of the main spring is connected with the sleeve, and the other end of the main spring is connected with the piston rod; the piston is provided with a plurality of first air holes which are uniformly distributed, and the first air holes penetrate through the piston and are communicated with the space where the sliding rod is located. The utility model discloses a structure to the piston rod improves for the piston rod also participates in the buffering of bumper shock absorber and comes, utilizes the effect of air, produces the throttle effect, and then forms certain buffering, and then combines together with the spring, makes can not produce the great distance displacement of acuteness when bearing great impact.

Description

Piston rod for vehicle shock absorber

Technical Field

The utility model relates to a bumper shock absorber technical field specifically is a piston rod for vehicle bumper shock absorber.

Background

The shock absorber is an essential part on the vehicle, and is large enough for heavy-duty automobiles and small enough for electric vehicles; the shock absorber arranged on the existing electric vehicle or motorcycle generally consists of two telescopic rods capable of moving relatively and a spring, and then the spring is used for generating deformation to form buffering, so that the shock absorber is simple in structure and low in cost;

it can be seen that the main support of the shock absorbing device is realized by the spring, so the spring plays a role of supporting while absorbing shock, and in order to achieve better support, the spring has higher rigidity, and has poorer shock absorbing effect on small-distance shock, small jolt or low-force impact, and the spring needs stronger flexibility when the shock absorber needs to obtain buffering under low force, and the supporting strength of the shock absorber is reduced by the spring.

SUMMERY OF THE UTILITY MODEL

The technical insufficiency that exists to the aforesaid, the utility model aims at providing a piston rod for vehicle shock absorber improves through the structure to the piston rod for the piston rod also participates in the buffering of shock absorber and comes, utilizes the effect of air, produces the throttle effect, and then forms certain buffering, and then combines together with the spring, makes can not produce the great distance displacement of acuteness when bearing great impact.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the utility model provides a piston rod for vehicle shock absorber for realize bumper shock absorber reciprocating motion, be equipped with on the bumper shock absorber with this piston rod matched with sleeve, nested a main spring on sleeve and this piston rod, the one end of main spring with the sleeve is connected, the other end of main spring is connected with this piston rod, include:

the connecting rod is fixedly provided with a sliding rod, the sliding rod is a cylinder, and the outer diameter of the sliding rod is smaller than the inner diameter of the sleeve;

the piston is fixed at the end part of the sliding rod, which is far away from the connecting rod, and is coaxial with the sliding rod; the outer peripheral wall of the piston is attached to the inner wall of the sleeve and can slide relative to the inner wall of the sleeve;

the piston is provided with a plurality of first air holes which are uniformly distributed, and the first air holes penetrate through the piston and are communicated with the space where the sliding rod is located.

Preferably, the first air hole is in an hourglass shape with a reduced middle part and two flared ends.

Preferably, the first air hole is a cylindrical hole, a detachable air core is arranged in the first air hole, the air core comprises a flexible area in the middle and rigid areas at two ends, the flexible area is in an hourglass shape with a contracted middle part and flared ends at two ends, and the rigid area is cylindrical;

the rigid zones at two ends are attached to the inner wall of the first air hole, and a gap is formed between the flexible zone in the middle and the inner wall of the first air hole; when the airflow with certain pressure passes through the air core, the flexible area can be prompted to deform, and the deformation direction faces to the inner wall of the first air hole.

Preferably, the flexible region is divided into a concave part at the middle part and convex parts at two ends, the concave part is formed by rotating an inwards concave circular arc, the convex part is formed by rotating an outwards convex circular arc, and the outwards convex circular arcs are tangent to the inwards concave circular arc.

Preferably, the concave part is provided with a plurality of second air holes which are uniformly distributed.

Preferably, the gas core is detachably provided in the first gas hole by a locking ring screw-fitted in the first gas hole.

Preferably, a plurality of third air holes which are in one-to-one correspondence with the first air holes are formed in the peripheral wall, close to the piston, of the slide rod, and the corresponding first air holes are communicated with the third air holes;

the third air hole is a cylindrical hole, and the width of a channel formed at the intersection of the third air hole and the first air hole is smaller than the inner diameter of the first air hole; the end part of the third air hole close to the axis of the sliding rod extends to the inner wall of the first air hole.

Preferably, a plurality of adjusting holes are formed in the connecting rod and are evenly distributed along the circumferential direction, auxiliary sliding rods capable of sliding freely are arranged in the adjusting holes, spacer sleeves are fixed to the end portions, far away from the connecting rod, of the auxiliary sliding rods, the spacer sleeves are nested on the sliding rods, and the spacer sleeves are fixed to one ends of the main springs.

Preferably, the end portion of the auxiliary sliding rod far away from the spacer sleeve is fixed with an auxiliary piston, the outer peripheral wall of the auxiliary piston is attached to the inner wall of the adjusting hole, two ends of the auxiliary piston are provided with an auxiliary spring, two ends of the adjusting hole are in threaded connection with an adjusting nut, and the auxiliary spring corresponds to the adjusting nut and tightly abuts against the adjusting nut.

The beneficial effects of the utility model reside in that:

the utility model discloses a structure to the piston rod is improved for the piston rod also participates in the buffering of bumper shock absorber, utilize the hourglass type structure of first gas pocket on it, make the piston when removing, can make the gas of piston both sides produce the change, and then make gas produce the circulation through first gas pocket, and then utilize first gas pocket to produce the effect of orifice, form the throttle, and then make the air produce the effect of compression exhaust, thereby make can not produce the great distance displacement of sharply when bearing great impact, improve the shock resistance of bumper shock absorber;

in addition, the inner diameter of the flow channel formed by the first air hole is changed by utilizing the air core, so that different buffering effects are generated, the application range of the shock absorber is improved, meanwhile, the arrangement of the air core provides convenience for the replacement of the shock absorber, and different air cores can be manufactured and installed in the piston, so that more throttling effects are obtained;

in addition, the adjusting holes arranged on the piston rod provide a structural foundation for the follow-up additional arrangement of the auxiliary spring and the auxiliary sliding rod of the shock absorber, so that the shock absorption effect of the shock absorber which is lost when the shock absorber is in low impact force or the vehicle slightly jolts is compensated, and the overall shock absorption effect of the shock absorber is further improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a piston rod for a vehicle shock absorber according to an embodiment of the present invention;

FIG. 2 is a partial cross-sectional view of FIG. 1 (first air hole when no air core is provided);

FIG. 3 is a partial cross-sectional view of FIG. 1 (first air hole with air core provided);

FIG. 4 is a schematic view of the structure of the air core;

FIG. 5 is a cross-sectional view of an air core;

FIG. 6 is a schematic view of the gas core without the second gas hole being formed therein;

FIG. 7 is a schematic view of the air core with a second air hole under pressure in the first air hole;

fig. 8 is a cross-sectional view of a shock absorber according to the present invention;

FIG. 9 is an enlarged view of FIG. 8 at section B;

FIG. 10 is an enlarged view of portion C of FIG. 8;

fig. 11 is a top view of the first air vent.

Description of reference numerals:

01-connecting rod, 02-sliding rod, 021-third air hole, 03-piston, 04-first air hole, 05-adjusting hole, 06-air core, 061-flexible region, 0611-concave portion, 0612-convex portion, 062-hard region, 063-second air hole, 07-locking ring;

1-sleeve, 2-main spring, 3-spacer bush, 31-auxiliary slide rod, 311-auxiliary piston, 4-auxiliary spring, 5-adjusting nut, 6-lock sleeve and 61-dustproof pad.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example (b):

as shown in fig. 1, the present invention provides a piston rod for a vehicle shock absorber for realizing the reciprocating motion of the shock absorber, that is, as shown in fig. 8, the shock absorber includes a sleeve 1 slidably connected to the piston rod, and a main spring 2 is nested between the piston rod and the sleeve 1, one end of the main spring 2 is connected to the sleeve 1, and the other end of the main spring 2 is connected to the piston rod, so as to generate elastic potential energy to the main spring 2 when the piston rod moves relative to the sleeve 1;

referring to fig. 1, the piston rod includes a connecting rod 01 and a piston 03, the piston 03 is connected to the connecting rod 01 through a sliding rod 02, the outer peripheral wall of the piston 03 is attached to the inner wall of the sleeve 1, that is, the sliding rod 02 is fixed on the connecting rod 02, the piston 03 is fixed at the end of the sliding rod 02 far away from the connecting rod 01 and coaxial with the sliding rod 02, the sliding rod 02 is a cylinder, the outer diameter of the sliding rod 02 is smaller than the inner diameter of the sleeve 1, so that spaces are formed at both sides of the piston 03, when the piston 03 moves, air in the spaces at both sides of the piston can be circulated, and therefore, in order to realize the circulation of air in the spaces at both sides of the piston 03, a plurality of first air holes 04 uniformly distributed are formed in the piston 03, that is, the first air holes 04 realize the communication between the spaces between; and then utilize the throttle effect of first gas pocket 04 for this piston rod also participates in the buffering of bumper shock absorber, when piston 03 is moving, can make the gas of piston 03 both sides produce the change and form the throttle, and then make the air produce the effect of compressed exhaust, thereby make can not produce sharp long-distance displacement when bearing great impact, improve the shock resistance of bumper shock absorber.

In order to communicate the spaces at the two sides of the piston 03 in cooperation with the first air holes 04, as shown in fig. 1, 2 and 10, a plurality of third air holes 021 corresponding to the first air holes 04 one by one are formed in the outer peripheral wall of the sliding rod 02 close to the piston 03, and the corresponding first air holes 04 are communicated with the third air holes 021 so as to communicate the spaces at the two sides of the piston 03;

further, for the throttle effect that improves first gas pocket 04, the setting that air current passageway that forms in first gas pocket 04 adopts the centre little, both ends are big, the utility model provides two kinds of embodiments, specifically as follows:

first, as shown in fig. 2, the first air hole 04 has an hourglass shape with a reduced middle part and two flared ends;

secondly, as shown in fig. 3, 4 and 5, the first air hole 04 is a cylindrical hole, and an air core 06 is arranged in the first air hole, and the air core 06 includes a flexible region 061 in the middle and a rigid region 062 at two ends, the flexible region 061 is in an hourglass shape with a contracted middle and flared ends, the rigid region 062 is cylindrical, that is, the middle of the flexible region 061 is fine and the two ends are wide, and the rigid region 062 is for installation, so that the two ends of the air core 06 are better attached to the first air hole 04, and therefore, the first air hole 04 needs to be arranged in a cylindrical structure; wherein, the hard areas 062 at the two ends are attached to the inner wall of the first air hole 04, and a gap is formed between the middle flexible area 061 and the inner wall of the first air hole 04; when air flow with certain pressure passes through the air core 06, the flexible region 061 can be prompted to deform, and the deformation direction faces the inner wall of the first air hole 04;

finally, in the first case, the inner diameter of the airflow channel formed by the first air holes 04 is invariable, and in the second case, the airflow channel formed by the first air holes 04 is actually determined by the air core 06, and the air core 06 can deform, so that the inner diameter of the airflow channel can be changed, that is, the size of the airflow channel can be changed according to the size of external impact force by utilizing the deformation of the airflow channel, and different buffering effects can be obtained according to the size of the external impact force;

further, with reference to fig. 4 and 5, in order to make the structure of the flexible region 061 more streamlined and adapt to the flow of the airflow, the flexible region 061 is divided into a concave portion 0611 at the middle and convex portions 0612 at both ends, the concave portion 0611 is formed by rotating an inward-concave arc, the convex portion 0612 is formed by rotating an outward-convex arc, and both the outward-convex arcs are tangent to the inward-concave arc.

Furthermore, in order to enable the deformation of the air core 06 to generate different variation amounts according to different requirements, a plurality of second air holes 063 uniformly distributed are arranged on the concave portion 0611 of the air core flexible region 061, that is, as shown in fig. 4 and 5, the arrangement enables the air flow pressures on two sides of the air core 06 to be balanced to a certain extent, and prevents the deformation of the flexible region 061 of the air core 06 to a certain extent, so that the deformation sensitivity of the flexible region 061 is reduced, a stronger impact resistance effect is obtained, and a harder buffer is obtained; that is, when a relatively hard cushion is required, a certain number of second air holes 063 may be provided;

specifically, as shown in fig. 6 and 7:

in fig. 6, the second air hole 063 is not formed in the air core 06 at this time, and when the external air flow with pressure passes through the air core 06, it will form a spreading effect on the flexible region 061 of the air core 06, that is, as shown by an arrow in fig. 6, at this time, because there is no second air hole 063, the air pressure in the gap between the flexible region 061 and the first air hole 04 is lower than the air pressure in the air core 06, and further, the deformation of the flexible region 061 is facilitated;

in fig. 7, the second air hole 063 has been seted up to air core 06 this moment, when outside area pressed the air current and passed air core 06, it still can form the effect of strutting to air core 06 flexibility region 061, the arrow in fig. 7 shows promptly, but this moment because the existence of second air hole 063, consequently there is the effect of intercommunication in the clearance between flexibility region 061 and the first air hole 04 and air core 06, some area pressed the air current and got into in this clearance through second air hole 063, and then make the atmospheric pressure of air core 06 both sides obtain certain balance, finally reduced the deformation degree and the flexibility ratio of flexibility region 061, and then make the throttling effect better, and obtain harder buffering.

In addition, the air core 06 is detachably mounted for subsequent operations such as replacement, that is, as shown in fig. 3, a locking ring 07 is internally threaded in the first air hole 063, and the locking ring 07 fits the air core 06 in the first air hole 04 and restricts the air core from being separated from the first air hole 04.

Finally, considering the characteristics of the flexible region 061 and the hard region 062, the flexible region 061 is made of soft rubber, the hard region 062 is made of hard rubber, and the specific hardness of the rubber is not specifically limited and can be set according to actual conditions.

In conclusion, in the actual use process, a second air hole 063 is arranged to obtain harder buffering, and finally buffering for different use requirements is realized; in addition also can go to realize through the mode that changes flexible district 061 hardness, it is removable to consider gas core 06 promptly, if the material of flexible district 061 is harder, then can make its difficult deformation, and then can obtain harder buffering, if the material of flexible district 061 is softer, then its yielding, and then more can adapt to external shock's change to carry out the change of adaptability according to the size of external impact force, obtain the buffering of soft partially.

In order to facilitate the installation of the air core 06, the third air hole 021 is a cylindrical hole, the width of a channel formed at the intersection of the third air hole 021 and the first air hole 04 is smaller than the inner diameter of the first air hole 04, and the end part of the third air hole 021 close to the axis of the sliding rod 02 extends to the inner wall of the first air hole 04; that is, as shown in d in fig. 11, the arrangement is such that the bottom of the first air hole 04 has a step to support the air core 06, but d cannot be too small, and if it is smaller than the minimum inner diameter of the air core 06 when it is not stressed, the air core 06 will lose the effect of deformation, so on the premise that the step can be formed to support the air core 06, the larger d is the better.

Finally, to further illustrate the mounting of the piston rod, as shown in fig. 8 to 11, a shock absorber structure is given, namely:

the shock absorber comprises a piston rod, a sleeve 1 and a main spring 2, and also comprises a connecting rod 01 fixed on the piston rod and the sleeve 1, wherein the connecting rod 01 is used for being connected with an external structure;

for dust prevention, as shown in fig. 10, a lock sleeve 6 is fixed at the end of the sleeve 1, a dust-proof pad 61 is arranged in the lock sleeve 6, the dust-proof pad 61 needs to be ventilated, that is, an air hole needs to be arranged on the dust-proof pad 61, for example, a brush can be used; it should be noted that the minimum inner diameter of the lock sleeve 61 is smaller than the outer diameter of the piston 03 to prevent the piston 03 from being separated from the sleeve 1, but the piston 03 cannot contact the lock sleeve 6 during the normal damping of the shock absorber;

in addition, the shock absorber provided in FIG. 8 is additionally provided with a sub-sliding rod 31 and a sub-piston 311, that is, as shown in fig. 9, a spacer 3 is fixed at both ends of the main spring 2, a plurality of auxiliary sliding rods 31 are fixed on the spacer 3, an auxiliary piston 311 is arranged at the end of the auxiliary sliding rod 31, an adjusting hole 05 for the auxiliary piston 311 to slide is opened on the connecting rod 01, two auxiliary springs 4 are arranged on two sides of the auxiliary piston 311, the auxiliary springs 4 are limited in the adjusting holes 05 through adjusting nuts 5, the initial elasticity of the auxiliary springs 4 can be adjusted by the arrangement of the adjusting nuts 5 according to the screwing depth of the adjusting nuts, so that a different damping is obtained, and furthermore the arrangement of the two adjusting nuts 5 also enables the limit positions of the secondary slide 31 in both directions to be defined, so that the secondary spring 4 can further act on the main spring 2 after acting, and therefore, the limit of the secondary spring in two directions is necessary; the added structures such as the auxiliary sliding rod 31 and the auxiliary piston 311 compensate the shock absorption effect of the shock absorber which is lost when the shock absorber is in low impact force or the vehicle slightly jolts, and further the overall shock absorption effect of the shock absorber is improved, therefore, the elastic modulus of the auxiliary spring 4 is smaller than that of the main spring 2, namely, the rigidity of the auxiliary spring 4 is lower than that of the main spring 2 nested on the sleeve 1 and the sliding rod 02, so that the auxiliary spring 4 is deformed firstly when the impact force is small, specific elastic force of the auxiliary spring 4 and the sliding rod 02 is not limited specifically, and the shock absorber can be set according to actual conditions.

In use, the piston rod is mounted in the manner shown in fig. 8 to connect with the sleeve 1, and the air core 06 is mounted in the manner shown in fig. 3 and 10, and is mounted in the first air hole 04 through the locking ring 07, so that two ends of the air core 06 respectively abut against the bottom of the first air hole 04 and the locking ring 07, but it should be noted that the flexible region 061 cannot be largely deformed in the axial direction by the mounting of the locking ring 07; meanwhile, when the air conditioner is actually used, whether a second air hole 063 is arranged in the flexible region 061 can be selected according to the situation; when the piston 03 displaces, air flow with pressure is generated in the space at two sides of the piston 03, so that the throttling effect formed by the air core 06 is utilized through the air core 06, and the self deformation adapts to the external impact force to achieve the adjusting effect;

depending on whether or not the piston rod is provided with the sub-rod 31, the sub-piston 311, and the like, it is also possible to provide the rod with the sub-rod 31, the sub-spring 4, the adjusting nut 5, and the like as shown in fig. 9 by providing the rod 001 of the piston rod with the adjusting hole 05 if the sub-rod is provided.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (9)

1. The utility model provides a piston rod for vehicle shock absorber for realize shock absorber reciprocating motion, be equipped with on the shock absorber with this piston rod matched with sleeve, the nested main spring that has on sleeve and this piston rod, the one end of main spring with the sleeve is connected, the other end of main spring is connected with this piston rod, its characterized in that includes:

the connecting rod is fixedly provided with a sliding rod, the sliding rod is a cylinder, and the outer diameter of the sliding rod is smaller than the inner diameter of the sleeve;

the piston is fixed at the end part of the sliding rod, which is far away from the connecting rod, and is coaxial with the sliding rod; the outer peripheral wall of the piston is attached to the inner wall of the sleeve and can slide relative to the inner wall of the sleeve;

the piston is provided with a plurality of first air holes which are uniformly distributed, and the first air holes penetrate through the piston and are communicated with the space where the sliding rod is located.

2. The piston rod for a shock absorber of a vehicle as set forth in claim 1, wherein said first air hole has an hourglass shape with a constricted middle and flared ends.

3. The piston rod for a shock absorber of a vehicle as claimed in claim 1, wherein said first air hole is a cylindrical hole, and a detachable air core is disposed in said first air hole, said air core includes a flexible region in the middle and a rigid region at both ends, said flexible region has an hourglass shape with a reduced middle portion and flared ends, and said rigid region has a cylindrical shape;

the rigid zones at two ends are attached to the inner wall of the first air hole, and a gap is formed between the flexible zone in the middle and the inner wall of the first air hole; when the airflow with certain pressure passes through the air core, the flexible area can be prompted to deform, and the deformation direction faces to the inner wall of the first air hole.

4. A piston rod for a shock absorber of a vehicle according to claim 3, wherein said flexible section is divided into a concave portion at a middle portion and convex portions at both ends, and said concave portion is formed by rotating an inner concave arc, and said convex portion is formed by rotating an outer convex arc, both of said outer convex arcs being tangent to said inner concave arc.

5. The piston rod for a shock absorber of a vehicle as claimed in claim 4, wherein said recess is opened with a plurality of second air holes uniformly distributed.

6. A piston rod for a shock absorber of a vehicle as set forth in any one of claims 3 to 5, wherein said air core is detachably provided in said first air bore by a locking ring threadedly fitted in said first air bore.

7. The piston rod for a shock absorber of a vehicle as claimed in claim 2 or 3, wherein a plurality of third air holes corresponding to the first air holes one to one are opened on the outer peripheral wall of the slide rod adjacent to the piston, and the corresponding first air holes are communicated with the third air holes;

the third air hole is a cylindrical hole, and the width of a channel formed at the intersection of the third air hole and the first air hole is smaller than the inner diameter of the first air hole; the end part of the third air hole close to the axis of the sliding rod extends to the inner wall of the first air hole.

8. The piston rod for the vehicle shock absorber according to claim 2 or 3, wherein the connecting rod is provided with a plurality of adjusting holes which are uniformly distributed along the circumferential direction, the adjusting holes are internally provided with auxiliary sliding rods which can freely slide, the end part of the auxiliary sliding rod far away from the connecting rod is fixedly provided with a spacer bush, the spacer bush is nested on the sliding rod, and the spacer bush is fixed with one end of the main spring.

9. The piston rod for the shock absorber of the vehicle as claimed in claim 8, wherein an auxiliary piston is fixed to an end of the auxiliary sliding rod away from the spacer, an outer peripheral wall of the auxiliary piston is attached to an inner wall of the adjusting hole, an auxiliary spring is disposed at each of two ends of the auxiliary piston, an adjusting nut is connected to each of two ends of the adjusting hole in a threaded manner, and the two auxiliary springs are correspondingly and tightly abutted against the adjusting nut.

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