CN215409938U - Vibration damper - Google Patents

Abstract

The utility model provides a shock absorber which comprises a shell, a cylinder body, a rod part, a limiting part, a hydraulic buffering part, a normally open hole and a controllable hole. Wherein, the spacing portion is fixedly connected on the outer surface of the rod portion so as to follow the rod portion. The hydraulic buffer part is accommodated in the cylinder body and is provided with a head part, the head part is sleeved on the rod part and extends along the radial direction of the rod part to be in contact with the inner wall of the cylinder body in a sliding mode, and the cylinder body is divided into a first cavity and a second cavity which are arranged along the axial direction due to the radial extension of the head part. A normally open port is formed in the head and provides continuous communication between the first and second chambers. The controllable hole is formed on the head, and the controllable hole has a closed state covering the controllable hole due to the fact that the limiting part abuts against one side of the head, and a conduction state due to the fact that the limiting part and the head are separated from abutting. The shock absorber can generate larger damping force in the recovery stroke so as to convert impact energy into heat energy and further effectively improve the buffering effect of the shock absorber.

Description

Vibration damper

Technical Field

The utility model relates to the technical field of shock absorbers, in particular to a shock absorber.

Background

Shock absorbers have a significant impact on the ride comfort, handling stability and ride comfort of a vehicle. When the automobile runs through a deep pit, the shock absorber is in a recovery stroke, the limiting seat moves towards the direction close to the guider, and at the moment, in order to prevent the limiting seat from directly impacting the guider to generate hard impact and damage the shock absorber, a structure with a buffering effect needs to be connected in series between the limiting seat and the guider so as to absorb the impact load transmitted to the shock absorber on the road surface and limit the maximum stroke of the shock absorber.

The existing restoring buffer structures in the shock absorber mainly comprise the following two types:

firstly, the buffer block that rubber materials made, the buffer block cover is on the piston rod, and spacing seat welding is on the piston rod. When the shock absorber is in the reset stroke, the piston rod moves towards the guider, the limiting seat impacts the buffer block, and the rear buffer block deforms to absorb impact energy so as to avoid hard impact between the limiting seat and the guider.

And the other is a hydraulic buffer structure, the working cylinder is necked down in the structure, and the buffer seat is welded on the piston rod. When the shock absorber is in the rebound stroke, the piston rod moves towards the guider, when the buffer seat moves to the necking position of the working cylinder, the gap between the buffer seat and the working cylinder is sharply reduced, at the moment, the damping force generated by oil passing through the gap is sharply increased, so that the impact energy is converted into heat energy, and the buffer effect is achieved.

The two types of restoration buffer structures are not enough in the using process, if the buffer block is designed, manufactured and assembled relatively simply and is low in cost, when the impact load is large, the buffer block is deformed and cannot completely absorb impact energy, large impact can be generated on the shock absorber, and great influence is caused on the comfort and the controllability of a vehicle.

Although the hydraulic buffer structure can effectively buffer larger impact load by reducing the clearance between the buffer seat and the working cylinder and generating large damping force, the guider and the buffer seat can be in direct contact at the tail end of the recovery stroke, and the shock absorber is easy to damage due to impact among metal elements. Meanwhile, in order to ensure that the gap size is within the required size, the requirements on the dimensional tolerance and the coaxiality tolerance of parts such as the necking working cylinder, the buffer seat, the piston rod and the like are extremely strict.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention is directed to a shock absorber, which has a better buffering effect.

In order to achieve the purpose, the technical scheme of the utility model is realized as follows:

a shock absorber comprising a housing, and further comprising:

a cylinder housed in the housing, fixed to the housing, and filled with liquid;

a rod part which is guided to be accommodated in the cylinder body so as to have an axial reciprocating motion;

the limiting part is fixedly connected to the outer surface of the rod part and follows the rod part;

a hydraulic buffer part accommodated in the cylinder; the hydraulic buffer part is provided with a head part which is sleeved on the rod part and extends along the radial direction of the rod part so as to be abutted against the inner wall of the cylinder body in a sliding manner; the cylinder is divided into a first chamber and a second chamber which are arranged along the axial direction due to the radial extension of the head part;

a normally open orifice formed in the head, constituting continuous communication of the first and second chambers;

a controllable aperture formed on the head; the controllable hole has a closed state covering the controllable hole due to the fact that the limiting part abuts against one side of the head, and a conduction state due to the fact that the limiting part and the head are separated from abutting.

Further, the hydraulic buffer portion includes an elastic device, and the head portion is carried by the elastic device and is positioned and arranged in the cylinder body.

Further, the elastic device is a rubber sleeve sleeved on the rod part; one end of the rubber sleeve is fixedly arranged relative to the cylinder body, and the other end of the rubber sleeve is connected to one side, deviating from the limiting part, of the head in a vulcanization mode.

Furthermore, at least one guide part for guiding the rubber sleeve to deform along the radial direction of the rod part is arranged on the rubber sleeve.

Further, the rubber boot is formed in a wave shape due to the plurality of guide portions.

Furthermore, a guide part is fixedly arranged in the shell, and the rod part is inserted into the guide part in a sliding manner; one end of the elastic device is fixedly connected to the guide part to form a positioning device in the cylinder body.

Further, the controllable aperture is disposed adjacent to the stem portion.

Further, the stopper portion is configured in a stepped shape.

Further, the head portion is configured in a U-shape that can receive the stopper portion.

Further, the head comprises a U-shaped metal framework and a colloidal layer wrapped outside the framework.

Compared with the prior art, the utility model has the following advantages:

according to the shock absorber, the normally open hole and the controllable hole are formed in the head, so that in a recovery stroke, when the controllable hole is in a conducting state, liquid flows between the first chamber and the second chamber through the normally open hole and the controllable hole to generate damping force preliminarily and convert impact energy into heat energy; when the controllable hole is in a closed state, liquid circulates between the first chamber and the second chamber through the normally open hole, the generated damping force is larger due to the fact that the liquid circulation amount of the normally open hole is smaller, impact energy can be further converted into heat energy, and therefore the buffering effect of the shock absorber is effectively improved.

In addition, through setting up the rubber sleeve to set up a plurality of guide portions on the rubber sleeve, and make the rubber sleeve wholly be the wave form, so that take place folding when making the rubber sleeve compressed, can further absorb impact energy, can effectively avoid spacing portion and guide portion to take place rigid impact again.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a schematic structural diagram of a shock absorber according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of an elastic device according to an embodiment of the present invention;

FIG. 3 is a schematic return stroke diagram of the shock absorber in accordance with the exemplary embodiment of the present invention;

FIG. 4 is a schematic compression stroke diagram of the shock absorber in accordance with the exemplary embodiment of the present invention;

description of reference numerals:

1. a housing; 2. a cylinder body; 201. a first chamber; 202. a second chamber;

3. a rod portion; 4. a limiting part; 5. a hydraulic buffer section; 501. a head portion; 5011. opening holes normally; 5012. a controllable aperture; 5013. a metal skeleton; 5014. a colloidal layer; 502. an elastic device; 5021. a guide section; 5022. a through hole;

6. a guide portion.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it should be noted that, if terms indicating orientation or positional relationship such as "upper", "lower", "inside", "outside", etc. appear, they are based on the orientation or positional relationship shown in the drawings and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the appearances of the terms first, second, etc. in this specification are not necessarily all referring to the same item, but are instead intended to cover the same item.

Furthermore, in the description of the present invention, the term "connected" is to be understood broadly, unless otherwise explicitly defined. For example, the connection can be fixed, detachable or integrated; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. To those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in conjunction with specific situations.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

The utility model relates to a shock absorber which comprises a shell 1, a cylinder body 2, a rod part 3, a limiting part 4, a hydraulic buffering part 5, a normally open hole 5011 and a controllable hole 5012 in an integral structure. Through the matching use of the normally open hole 5011 and the controllable hole 5012, a damping force can be formed in the recovery stroke of the shock absorber, impact energy is converted into heat energy, and the buffering effect of the shock absorber is further improved.

It should be noted that, the structures of the shock absorber not described in this embodiment can refer to the common structural parts of the shock absorber in the prior art, and are not described herein again.

Based on the above design concept, an exemplary structure of the shock absorber of the present embodiment is as shown in fig. 1 to 4, a cylinder 2 of the present embodiment is housed in a housing 1 and is fixed to the housing 1, and a liquid is filled in the cylinder 2. And the rod 3 is guided to be accommodated in the cylinder 2 to have an axial reciprocating motion. The limiting part 4 is fixedly connected on the outer surface of the rod part 3 so as to follow the rod part 3.

The hydraulic buffer part 5 is accommodated in the cylinder body 2, the hydraulic buffer part 5 has a head part 501, the head part 501 is sleeved on the rod part 3 and is arranged along the radial extension of the rod part 3 to be in sliding contact with the inner wall of the cylinder body 2, and the cylinder body 2 is divided into a first chamber 201 and a second chamber 202 which are arranged along the axial direction due to the radial extension of the head part 501, specifically, as shown in fig. 1, the first chamber 201 is positioned at the left side of the head part 501, and the second chamber 202 is positioned at the right side of the head part 501.

The normally open orifice 5011 of this embodiment is formed in the head 501 to provide continuous communication between the first chamber 201 and the second chamber 202. The controllable hole 5012 is formed in the head 501, and the controllable hole 5012 has a closed state covering the controllable hole 5012 by the stopper 4 being abutted against the side of the head 501 and a conducting state by the stopper 4 being disengaged from the head 501. The closed state of the controllable orifice 5012 is shown in fig. 3, and the open state is shown in fig. 4.

It should be noted that the diameter Φ of the normally open hole 5011 of this embodiment can be set and adjusted according to the actual hydraulic buffering requirement, and theoretically, the smaller the value of Φ is, the better the hydraulic buffering effect of the normally open hole 5011 is, but it is necessary to ensure that the normally open hole 5011 can allow the liquid to normally circulate.

To enhance the damping effect, the hydraulic damping part 5 of the present embodiment includes an elastic device 502, and as shown in fig. 1, the head part 501 is carried by the elastic device 502 and positioned in the cylinder 2. And preferably, the elastic device 502 is a rubber sleeve sleeved on the rod part 3, one end of the rubber sleeve is fixedly arranged relative to the cylinder body 2, and the other end of the rubber sleeve is connected to one side of the head part 501, which is far away from the limiting part 4, in a vulcanization mode.

In order to realize the folding of the rubber sleeve when the rubber sleeve is compressed, as shown in fig. 2, in the embodiment, at least one guiding portion 5021 for guiding the rubber sleeve to deform along the radial direction of the rod portion 3 is provided on the rubber sleeve. And the rubber boot is configured in a wave shape due to the plurality of guide parts 5021.

During concrete implementation, the axial dimension h and the thickness dimension t of the rubber sleeve of this embodiment can be set for and adjusted according to the size demand of actual buffer stroke, and h and t value are big more, and the buffering effect of rubber sleeve is better, only need guarantee that the rubber sleeve can form normal folding when compressed can.

Meanwhile, the number of the guide parts 5021 of the present embodiment is preferably 4 as shown in fig. 2, and of course, the setting and adjustment of the number of the guide parts 5021 can also be designed according to the actual deformation requirement of the rubber sleeve, such as 5 or 6, just by ensuring that the rubber sleeve is integrally formed in a wave shape and is folded when being compressed.

In addition, in practical implementation, the rubber sleeve further divides the first chamber 201 into an outer chamber and an inner chamber, so that the rubber sleeve can be folded better when being compressed, and a plurality of through holes 5022 are preferably arranged on the rubber sleeve, so that the liquid in the inner chamber flows through the outer chamber via the through holes 5022 and flows into the second chamber 202 via the normally open hole 5011.

In this embodiment, as shown in fig. 1, a guiding portion 6 is fixedly disposed in the housing 1, the rod portion 3 is slidably inserted into the guiding portion 6, and one end of the elastic device 502, i.e. the left end of the rubber sleeve shown in fig. 1, is fixedly connected to the guiding portion 6 to form a positioning arrangement in the cylinder 2.

In practical implementation, as also shown in fig. 1, the controllable hole 5012 of the present embodiment is disposed adjacent to the shaft portion 3, and the limiting portion 4 is configured to be stepped, and in the state shown in fig. 1, the left side of the stepped limiting portion 4 has a larger contact area with the head portion 501, that is, the covering area of the limiting portion 4 on the head portion 501 is larger. Therefore, the limit part 4 can be used for covering the controllable hole 5012 in an attaching mode, and the closed state or the conducting state of the controllable hole 5012 can be formed conveniently.

In addition, the head portion 501 of the present embodiment is preferably configured in a U-shape that can receive the stopper portion 4. And preferably, the head 501 includes a U-shaped metal frame 5013 and a gel layer 5014 wrapped around the outside of the frame. Thus, a better matching effect between the head 501 and the cylinder 2 and the limit part 4 can be conveniently formed, specifically, in the state shown in fig. 1, the contact area between the head 501 and the cylinder 2 is larger, and the head 501 and the cylinder 2 can be in close contact through the colloid layer 5014 and the cylinder 2, so that liquid can only flow between the first chamber 201 and the second chamber 202 through the normally open hole 5011 and the controllable hole 5012 during the use process of the shock absorber, and a good hydraulic buffering effect of the shock absorber is further ensured.

The rebound stroke of the shock absorber of the present embodiment, specifically referring to the state shown in fig. 3, the rod portion 3 is stretched to the left, at this time, the controllable orifice 5012 is still in the conducting state, and the liquid flows from the first chamber 201 to the second chamber 202 through the normally open orifice 5011 and the controllable orifice 5012, as shown by the flow direction of the arrow in the figure, to primarily generate the damping force and convert the impact energy into heat energy;

then, the limiting part 4 abuts against the head part 501 and covers the controllable hole 5012, so that the controllable hole 5012 is in a closed state, the liquid in the first chamber 201 can only flow into the second chamber 202 through the normally open hole 5011, and as the flow direction is still shown by the arrow in the figure, because the normally open hole 5011 has smaller flux, the generated damping force is larger, and the impact energy can be further converted into heat energy;

meanwhile, when the controllable hole 5012 is in a closed state, the rubber sleeve is gradually compressed in the process that the rod part 3 continues to be stretched towards the left side, so that impact energy can be further absorbed, and hard impact between the limiting part 4 and the guide part 6 can be effectively avoided.

In the compression stroke of the shock absorber of the present embodiment, referring specifically to the state shown in fig. 4, the rod 3 moves to the right, the head 501 and the limiting part 4 are gradually separated and reset under the action of the liquid pressure and the elastic force of the rubber sleeve, and the liquid flows from the second chamber 202 into the first chamber 201 through the normally open hole 5011 and the controllable hole 5012, as shown by the arrows in the figure.

In the shock absorber of the embodiment, by providing the normally open hole 5011 and the controllable hole 5012 on the head 501, during the recovery stroke, when the controllable hole 5012 is in a conducting state, liquid can circulate between the first chamber 201 and the second chamber 202 through the normally open hole 5011 and the controllable hole 5012, so as to initially generate a damping force to convert the impact energy into heat energy; when the controllable hole 5012 is in a closed state, liquid flows between the first chamber 201 and the second chamber 202 through the normally open hole 5011, and due to the fact that the liquid flow of the normally open hole 5011 is smaller, the generated damping force is larger, impact energy can be further converted into heat energy, and therefore the buffering effect of the shock absorber is effectively improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. A shock absorber comprising a housing (1), characterized by further comprising:

the cylinder body (2) is accommodated in the shell (1), is fixedly arranged relative to the shell (1), and is filled with liquid;

a rod (3) which is guided and housed in the cylinder (2) so as to have an axial reciprocating motion;

the limiting part (4) is fixedly connected to the outer surface of the rod part (3) and follows the rod part (3);

a hydraulic buffer (5) housed in the cylinder (2); the hydraulic buffer part (5) is provided with a head part (501), the head part (501) is sleeved on the rod part (3) and extends along the radial direction of the rod part (3) to be in sliding contact with the inner wall of the cylinder body (2); the cylinder (2) is divided into a first chamber (201) and a second chamber (202) which are arranged along the axial direction due to the radial extension of the head part (501);

a normally open hole (5011) formed on the head (501) constituting a continuous communication of the first chamber (201) and the second chamber (202);

a controllable orifice (5012) formed on the head (501); the controllable hole (5012) has a closed state in which the stopper (4) abuts against the head (501) to cover the controllable hole (5012), and a conductive state in which the stopper (4) and the head (501) are not in abutment.

2. The shock absorber according to claim 1, wherein:

the hydraulic buffer (5) comprises elastic means (502);

the head (501) is carried by the elastic means (502) positioned inside the cylinder (2).

3. The shock absorber according to claim 2, wherein:

the elastic device (502) is a rubber sleeve sleeved on the rod part (3);

one end of the rubber sleeve is fixedly arranged relative to the cylinder body (2), and the other end of the rubber sleeve is connected to one side, deviating from the limiting part (4), of the head part (501) in a vulcanization mode.

4. The shock absorber according to claim 3, wherein:

at least one guide part (5021) for guiding the rubber sleeve to deform along the radial direction of the rod part (3) is arranged on the rubber sleeve.

5. The shock absorber according to claim 4, wherein:

due to the plurality of guide parts (5021), the rubber sleeve is wave-shaped.

6. The shock absorber according to claim 2, wherein:

a guide part (6) is fixedly arranged in the shell (1);

the rod part (3) is inserted into the guide part (6) in a sliding manner;

one end of the elastic device (502) is fixedly connected on the guide part (6) to form a positioning device in the cylinder body (2).

7. The shock absorber according to claim 1, wherein:

the controllable orifice (5012) is arranged adjacent to the rod part (3).

8. The shock absorber according to claim 1, wherein:

the limiting part (4) is designed in a step shape.

9. The damper according to any one of claims 1 to 7, wherein:

the head portion (501) is configured in a U-shape that can receive the stopper portion (4).

10. The shock absorber according to claim 9, wherein:

the head (501) comprises a U-shaped metal framework (5013) and a colloidal layer (5014) wrapped outside the framework.

Images