CN211474737U - Secondary buffer device and secondary buffer shock absorber - Google Patents
Secondary buffer device and secondary buffer shock absorber Download PDFInfo
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- CN211474737U CN211474737U CN201920855500.1U CN201920855500U CN211474737U CN 211474737 U CN211474737 U CN 211474737U CN 201920855500 U CN201920855500 U CN 201920855500U CN 211474737 U CN211474737 U CN 211474737U
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Abstract
The utility model discloses a second grade buffer, including movable piston subassembly, bottom valve subassembly, spring housing and needle. The movable piston assembly is arranged in the piston cylinder and is in sliding connection with the inner wall of the piston cylinder and used for dividing the piston cylinder into an air chamber cavity and an oil chamber cavity, and the bottom valve assembly is arranged on a bottom valve seat of the piston cylinder, wherein the bottom valve assembly comprises a spring sleeve arranged in the bottom valve seat and a valve needle arranged in the spring sleeve and pushes the valve needle into the piston cylinder so as to inflate the air chamber cavity. The bottom valve assembly is used for inflating the air chamber cavity, and the movable piston assembly moves when the piston rod assembly is subjected to external force, so that the ratio of recovery resistance to compression resistance is reduced, and the ratio is large.
Description
Technical Field
The utility model relates to a vehicle parts technical field, in particular to second grade buffer and second grade buffering bumper shock absorber.
Background
In order to increase the comfort of the vehicle, the chassis system of the automobile adopts a shock absorber for shock absorption and buffering, and the shock absorber is mainly used for inhibiting the shock when the spring absorbs the shock and rebounds and the impact from the road surface. While the shock-absorbing spring can filter the vibration of the road surface when passing through the uneven road surface, the spring itself reciprocates, and the shock absorber is used for suppressing the jump, and the shock absorber depends on the damping force to suppress the jump of the spring. The actual condition of the shock absorber in the current market is that the shock absorber is not inflated, so that the ratio of the recovery resistance to the compression resistance is larger, even if the shock absorber is inflated, the bottom valve is subjected to plug welding after the shock absorber is inflated by a special machine, the rejection rate is higher in the actual production process,
therefore, there is a need for a shock absorber that can be inflated in a flexible manner and that can reduce the ratio of the restoring resistance to the compression resistance.
SUMMERY OF THE UTILITY MODEL
Objects of the invention
For overcoming at least one defect that above-mentioned prior art exists, adopt flexible mode to aerify and can reduce the great bumper shock absorber of recovered resistance and compression resistance ratio, the utility model discloses a following technical scheme.
(II) technical scheme
As a first aspect of the utility model, the utility model discloses a second grade buffer, include:
the movable piston assembly is arranged in the piston cylinder, is in sliding connection with the inner wall of the piston cylinder and is used for dividing the piston cylinder into an air chamber cavity and an oil chamber cavity;
the bottom valve assembly is arranged on a bottom valve seat of the piston cylinder;
the base valve assembly includes a spring housing mounted within the cylinder base valve seat and a valve needle mounted within the spring housing that is urged into the piston cylinder to inflate the air chamber cavity.
In a possible embodiment, the movable piston assembly is provided with a sealing ring and at least one guide piston ring.
In one possible embodiment, the base valve assembly further comprises:
the elastic piece is sleeved on the outer side wall of the valve needle, and the elastic piece is installed in the spring sleeve.
In a possible embodiment, the spring sleeve is provided with a cavity opening away from the bottom wall of the piston cylinder.
In a possible embodiment, a boss is fixedly connected to one end of the valve needle, and an end face of the boss abuts against the bottom wall of the piston cylinder.
In one possible embodiment, the base valve assembly further comprises:
and the rubber cover is arranged in the cylinder bottom valve seat.
In a possible embodiment, a sealing ring is arranged in the outer side wall of the spring sleeve.
In a possible embodiment, a sealing ring is arranged in the outer side wall of the valve needle.
In one possible embodiment, the valve needle is screwed to the projection.
As a second aspect of the utility model, the utility model also discloses a second grade buffering bumper shock absorber, include:
the secondary buffer device of any one of the above technical schemes.
(III) advantageous effects
The utility model discloses a second grade buffer and second grade buffering bumper shock absorber has following beneficial effect:
1. the movable piston assembly separates the air chamber cavity from the oil chamber cavity and is used as a secondary air chamber buffering and damping device for buffering and damping the primary oil chamber, and when the shock absorber is stressed, the ratio of the restoring resistance or the compression resistance is reduced, so that the fluctuation of a damping curve is more stable, and the damping performance is more comfortable.
2. The movable piston assembly adopts a guide piston ring axial symmetry double-positioning mode, so that the friction resistance is reduced, and the movable piston assembly is ensured not to be blocked due to friction in the sliding process, thereby ensuring the service life and the use effect of the shock absorber.
3. The sealing ring in the movable piston assembly plays a sealing role when the movable piston assembly slides.
4. The shock absorber adopts the inflation sealing of the bottom valve assembly, and the problem of scrapping does not exist in the production process.
5. The elastic piece applies force towards the inflating opening, so that the boss of the valve needle is tightly attached to the bottom wall of the piston cylinder.
6. The rubber cover is coated with a sealing gum and pressed into the bottom of the valve seat at the bottom of the cylinder to carry out secondary sealing treatment on the valve needle.
Drawings
The embodiments described below with reference to the drawings are exemplary and intended to explain and illustrate the invention and should not be interpreted as limiting the scope of the invention.
Fig. 1 is a schematic three-dimensional structure diagram of a first embodiment of a secondary buffer device disclosed in the present invention.
Fig. 2 is a cross-sectional view of the movable piston assembly.
FIG. 3 is a cross-sectional view of the base valve assembly.
Detailed Description
In order to make the purpose, technical solution and advantages of the present invention clearer, the following will combine the drawings in the embodiments of the present invention to perform more detailed description on the technical solution in the embodiments of the present invention.
It should be noted that: in the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described are some embodiments of the present invention, not all embodiments, and features in embodiments and embodiments in the present application may be combined with each other without conflict. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the scope of the invention.
A first embodiment of a two-stage damping device according to the present disclosure is described in detail below with reference to fig. 1 to 3. The embodiment is mainly applied to the shock absorber which is inflated in a flexible mode and can reduce the ratio of the restoring resistance to the compression resistance to be larger.
As shown in fig. 1-3, the present embodiment mainly includes a movable piston assembly 100, a base valve assembly 200, a spring housing 210 and a valve needle 220.
The shock absorber mainly comprises a spring and a damper, and the damper comprises a piston cylinder, a piston rod assembly and the like. Wherein a movable piston assembly 100 and a bottom valve assembly 200 are arranged in the piston cylinder, the movable piston assembly 100 is connected with the inner wall of the plug cylinder 300 in a sliding manner and is used for dividing the piston cylinder 300 into an air chamber cavity 320 and an oil chamber cavity 330, the piston rod assembly divides the oil chamber cavity 330 into an oil chamber upper cavity and an oil chamber lower cavity, and the bottom valve assembly 200 is arranged on a cylinder bottom valve seat 310 of the piston cylinder 300.
The base valve assembly 200 includes a spring housing 210 and a valve needle 220, the valve needle 220 is disposed in the spring housing 210, the spring housing 210 is mounted in a base valve seat 310, the valve needle 220 is pushed into the piston cylinder 300, and the valve body is opened to charge the air chamber cavity 320. The spring housing 210 is provided with a through hole penetrating the spring housing 210, the diameter of the through hole is larger than that of the valve needle 220, so that the valve needle smoothly penetrates the spring housing 210, and a certain gap is formed between the outer wall of the valve needle 220 and the inner wall of the through hole, so that gas flows into the air chamber through the gap.
The concrete explanation is as follows: the piston cylinder 300 is divided into an air chamber cavity 320 and an oil chamber cavity 330 by the movable piston assembly 100, oil is filled into the oil chamber cavity 330 to complete the assembly of the damper, the valve needle 220 is pushed into the piston cylinder 300 by adopting a special machine to inflate, the valve body is opened to inflate the air chamber cavity 320, the air chamber cavity is generally inflated with 0.4-0.6 MPA high-pressure gas, when the damper is stretched by the outside, the piston rod assembly moves upwards, the movable piston assembly also can make corresponding position change, and the movable piston assembly moves upwards due to the reduction of the pressure of the lower cavity of the oil chamber and serves as a secondary air cavity which is equivalent to the primary oil chamber for buffering and damping, so that the restoring force is reduced, and the restoring resistance is reduced; when the shock absorber is compressed from the outside, the piston rod assembly moves downwards, the movable piston assembly also can change correspondingly, the movable piston assembly moves downwards due to the increase of the pressure of the lower cavity of the oil cavity and serves as a secondary air cavity which is equivalent to the primary oil cavity for buffering and damping, the compression force is reduced, the compression resistance is reduced, and therefore the fluctuation of a damping curve is more stable and the damping performance is more comfortable when the vehicle vibrates up and down in the running process.
In one embodiment, the movable piston assembly 100 is provided with a seal ring 130 and at least one guide piston ring 120. An annular groove is formed in the wall surface of the outer side of the axis center of the movable piston assembly 100 and used for installing a sealing ring 130 in the groove, the movable piston assembly 100 separates an air chamber cavity and an oil chamber cavity through sealing of the sealing ring 130, and the sealing ring 130 is an O-shaped sealing ring 130. The movable piston assembly 100 is further provided with a groove for installing the guide piston ring 120, the groove is arranged in the axial direction of the movable piston assembly 100 and is distributed on two sides of the groove at equal intervals, the movable piston assembly 100 and the piston cylinder 300 are concentric, the movable piston assembly 100 is guaranteed not to be blocked due to friction in the sliding process, and the service life and the using effect of the shock absorber are guaranteed.
The guiding piston ring 120 is made of polytetrafluoroethylene to reduce frictional resistance, the movable piston is made of aluminum materials to reduce weight, and the sealing ring 130 is made of an O-shaped sealing ring 130.
The specific working process is as follows: under normal conditions, the O-shaped sealing ring 130 and the guide piston ring 120 are placed in the movable piston groove to be positioned and protrude out of the movable piston, after the O-shaped sealing ring 130 and the guide piston ring 120 are installed in the piston cylinder 300, due to the extrusion effect, the sealing ring 130 is in close contact with the inner wall of the piston cylinder 300, meanwhile, a gap is reserved between the movable piston assembly 100 and the inner wall of the piston cylinder 300, the O-shaped sealing ring 130 plays a sealing effect during sliding, and the guide piston rings 120 at two ends play a double positioning effect, so that the movable piston assembly 100 can slide up.
In one embodiment, the base valve assembly 200 further includes an elastic member 230, the elastic member 230 is sleeved on the outer side wall of the valve needle 220, and the elastic member 230 is installed in the spring sleeve 210, the spring sleeve 210 is provided with a cavity with an opening facing away from the bottom wall of the piston cylinder 300, one end of the elastic member 230 abuts against the bottom surface of the cavity, the other end abuts against a circular truncated cone arranged on the valve needle, the elastic member 230 applies a force towards the inflation port to enable the valve needle 220 to be tightly attached to the bottom wall of the piston cylinder 300, and the elastic member 230 is selected as a spring.
In one embodiment, a boss 221 is fixedly connected to one end of the valve needle 220 away from the circular truncated cone, and an end surface of the boss 221 abuts against the bottom wall of the piston cylinder 300, so that the contact area between the valve needle 220 and the bottom wall of the piston cylinder 300 is increased, and a gap between the through hole and the valve needle 220 can be covered.
In one embodiment, base valve assembly 200 further includes a rubber cover 240, wherein rubber cover 240 is mounted within cylinder base valve seat 310, and upon completion of inflation, valve needle 220 is sealed by applying a sealant to rubber cover 240 and pressing it into cylinder base valve seat 310.
The working principle is as follows: the needle 220 is pushed by a thimble in the inflation valve of the special inflation device to move to open the valve body for inflation, after the inflation is finished, the valve body is closed to finish the inflation by means of pressure restoration of the elastic part 230 and the air chamber cavity 320, and after the inflation is finished, the rubber cover 240 coated with sealant is pressed into the cylinder bottom valve seat 310 to carry out secondary sealing treatment on the needle 220.
When the base valve assembly is closed, when the shock absorber is under tension, the piston rod assembly moves upwards, the pressure in the lower cavity of the oil chamber is reduced, the movable piston assembly 100 moves upwards, the pressure in the air chamber 320 is reduced, and at the moment, the elastic force of the elastic member 230 can overcome the force of the part or the whole of the valve needle 220 moving upwards due to the pressure reduction, so that the base valve assembly 200 is always in a closed state.
When inflation is required, the high-pressure gas overcomes the elastic force of the elastic member 230 to compress the elastic member 230 until the position of the O-ring 130 is higher than the shoulder of the cylinder bottom valve seat 310, i.e. enters the spring sleeve 210, at this time, the high-pressure gas enters the air chamber 320 from the gap between the through hole of the cylinder bottom valve seat 310 and the valve needle 220, and the inflation valve is removed to close the valve body by means of the pressure recovery in the elastic member 230 and the air chamber 320 to complete inflation. After the inflation is finished, the rubber cover 240 is coated with the sealant and pressed into the cylinder bottom valve seat 310 to perform the secondary sealing treatment on the valve needle 220.
In one embodiment, a seal ring 130 is disposed on the outer sidewall of the spring housing 210 to seal the spring housing 210 to the cylinder bottom seat 310.
In one embodiment, a sealing ring 130 is disposed on the outer sidewall of the valve needle 220 to seal between the valve needle 220 and the spring housing 210.
A first embodiment of a two-stage cushion shock absorber according to the present disclosure is described in detail below with reference to fig. 1 to 3. The embodiment is mainly applied to the shock absorber which is inflated in a flexible mode and can reduce the ratio of the restoring resistance to the compression resistance to be larger.
As shown in fig. 1 to fig. 3, the present embodiment mainly includes the device described in the first embodiment of the secondary buffer device. The secondary damping means comprises a moving piston assembly 100, a base valve assembly 200, a spring housing 210 and a valve needle 220.
The shock absorber mainly comprises a spring and a damper, and the damper comprises a piston cylinder, a piston rod assembly and the like. Wherein a movable piston assembly 100 and a bottom valve assembly 200 are arranged in the piston cylinder, the movable piston assembly 100 is connected with the inner wall of the piston cylinder 300 in a sliding manner and is used for dividing the piston cylinder 300 into an air chamber cavity 320 and an oil chamber cavity 330, the piston rod assembly divides the oil chamber cavity 330 into an oil chamber upper cavity and an oil chamber lower cavity, and the bottom valve assembly 200 is arranged on a cylinder bottom valve seat 310 of the piston cylinder 300.
The base valve assembly 200 includes a spring housing 210 and a valve needle 220, the valve needle 220 is disposed in the spring housing 210, the spring housing 210 is mounted in a base valve seat 310, the valve needle 220 is pushed into the piston cylinder 300, and the valve body is opened to charge the air chamber cavity 320. The spring housing 210 is provided with a through hole penetrating the spring housing 210, the diameter of the through hole is larger than that of the valve needle 220, so that the valve needle smoothly penetrates the spring housing 210, and a certain gap is formed between the outer wall of the valve needle 220 and the inner wall of the through hole, so that gas flows into the air chamber through the gap.
In one embodiment, the movable piston assembly 100 is provided with a seal ring 130 and at least one guide piston ring 120. An annular groove is formed in the wall surface of the outer side of the axis center of the movable piston assembly 100 and used for installing a sealing ring 130 in the groove, the movable piston assembly 100 separates an air chamber cavity and an oil chamber cavity through sealing of the sealing ring 130, and the sealing ring 130 is an O-shaped sealing ring 130. The movable piston assembly 100 is further provided with a groove for installing the guide piston ring 120, the groove is arranged in the axial direction of the movable piston assembly 100 and is distributed on two sides of the groove at equal intervals, the movable piston assembly 100 and the piston cylinder 300 are concentric, the movable piston assembly 100 is guaranteed not to be blocked due to friction in the sliding process, and the service life and the using effect of the shock absorber are guaranteed.
In one possible embodiment, base valve assembly 200 further comprises:
the elastic member 230, the elastic member 230 is sleeved on the outer sidewall of the valve needle 220, and the elastic member 230 is installed in the spring housing 210.
In a possible embodiment, the spring housing 210 is provided with a cavity opening away from the bottom wall of the piston cylinder 300.
In a possible embodiment, a boss 221 is fixedly connected to one end of the valve needle 220, and an end surface of the boss 221 abuts against the bottom wall of the piston cylinder 300.
In one possible embodiment, base valve assembly 200 further comprises:
and the rubber cover 240 is arranged in the cylinder bottom valve seat 310.
In one possible embodiment, the spring housing 210 has a seal ring 130 disposed within an outer sidewall thereof.
In one possible embodiment, a sealing ring 130 is provided in the outer sidewall of the valve needle 220.
In one possible embodiment, the valve needle 220 is screwed to the projection 221.
The moving piston assembly 100, the base valve assembly 200, the spring housing 210 and the needle 220 of the present embodiment
The specific structures of the components and the like can be set according to the structure described in the first embodiment of the cargo sorting device, and are not described in detail.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A secondary buffer device, comprising:
the movable piston assembly is arranged in the piston cylinder, is in sliding connection with the inner wall of the piston cylinder and is used for dividing the piston cylinder into an air chamber cavity and an oil chamber cavity;
the bottom valve assembly is arranged on a bottom valve seat of the piston cylinder;
the base valve assembly includes a spring housing mounted within the cylinder base valve seat and a valve needle mounted within the spring housing that is urged into the piston cylinder to inflate the air chamber cavity.
2. A secondary cushion arrangement as claimed in claim 1, wherein said movable piston assembly is provided with a seal ring and at least one guide piston ring.
3. The secondary damping device of claim 1, wherein said base valve assembly further comprises:
the elastic piece is sleeved on the outer side wall of the valve needle, and the elastic piece is installed in the spring sleeve.
4. A secondary buffer as claimed in claim 1 wherein said spring housing is provided with a pocket opening away from said piston cylinder bottom wall.
5. A secondary buffer as claimed in claim 1 wherein a boss is fixedly attached to one end of said needle, said boss having an end surface abutting said bottom wall of said piston cylinder.
6. The secondary damping device of claim 1, wherein said base valve assembly further comprises:
and the rubber cover is arranged in the cylinder bottom valve seat.
7. The secondary cushion apparatus of claim 1 wherein a seal is disposed within an outer sidewall of said spring housing.
8. The secondary buffer of claim 1 wherein a seal is disposed within an outer sidewall of said valve needle.
9. The secondary buffer of claim 5 wherein said needle is threadably connected to said boss.
10. A secondary cushion shock absorber, comprising:
the secondary buffer device of any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920855500.1U CN211474737U (en) | 2019-06-06 | 2019-06-06 | Secondary buffer device and secondary buffer shock absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920855500.1U CN211474737U (en) | 2019-06-06 | 2019-06-06 | Secondary buffer device and secondary buffer shock absorber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211474737U true CN211474737U (en) | 2020-09-11 |
Family
ID=72376503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920855500.1U Active CN211474737U (en) | 2019-06-06 | 2019-06-06 | Secondary buffer device and secondary buffer shock absorber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211474737U (en) |
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2019
- 2019-06-06 CN CN201920855500.1U patent/CN211474737U/en active Active
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