CN204358008U - A kind of oppositely air damper - Google Patents
A kind of oppositely air damper Download PDFInfo
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- CN204358008U CN204358008U CN201420803985.7U CN201420803985U CN204358008U CN 204358008 U CN204358008 U CN 204358008U CN 201420803985 U CN201420803985 U CN 201420803985U CN 204358008 U CN204358008 U CN 204358008U
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Abstract
The utility model relates to elastic buffering mechanism field, disclose a kind of oppositely air damper, under being installed on running board, comprise sleeve pipe (1), piston rod (2), piston body (3) and steel pipe (4), piston body is set in the lower end of piston rod, the lower end of piston rod is located in steel pipe, steel pipe inner carrier body with the epimere of lower part for air pressure section (41), hypomere is oil pressure section (42), the bottom of steel pipe is provided with end socket part (43), casing pipe sleeve is loaded on outside piston rod, the inwall of steel pipe is provided with groove (44), and the groove depth of groove from top to bottom shoals gradually, piston only is by first piston sheet (31), labyrinth piston (32) and the second piston sheet (33) are from top to bottom formed, labyrinth piston is stepped cylindrical ring, its hypomere outer wall is provided with seal ring (34), labyrinth piston and seal ring are non-drive fit.The utility model not easily blocks, and affects little, highly versatile by temperature, and cushion effect is more synchronous with the pressure of running board descent, better effects if.
Description
Technical field
The utility model relates to elastic buffering mechanism field, particularly relates to a kind of oppositely air damper.
Background technique
Air damping has good buffering and shock-proof effect, volume is little, cost is low, be widely used in body building device, the fields such as automobile, a air damper be installed under liftable running board for our company's production shown in Fig. 1, the epimere of buffer cavity is air pressure section, hypomere is oil pressure section, shown in Fig. 2, piston only is provided with some through holes, when piston only is subject to external force to lower compression, first be that the air-flow of air pressure section is discharged from buffer cavity by the through hole on piston only, to a certain extent, the oil of oil pressure section is discharged from buffer cavity by the through hole on piston only, thus serve cushioning effect, this air damper regulates the pressure in buffer cavity by the through hole extruding different pore size on piston, the aperture of through hole is less, buffer capacity is stronger.Its deficiency is: 1. when oil pressure section cushion effect requires very large, clear size of opening on piston only can be very little, simultaneously, O RunddichtringO and piston groove, steel pipe inner wall are interference fit, air damper is in assembly process, turbidity test require very high, otherwise easily produce through hole blocking, or valve block such as cannot to close at the problem.2. oil pressure is comparatively obvious with the impact of temperature, and when summer and winter, the temperature difference was larger, the oil pressure change of oil pressure section very greatly, can affect landing the time of running board, the consequence that board can not get off even can occur.3. versatility is not strong, and after running board changes, due to different to the requirement of buffer capacity, air damper can not be general.
Model utility content
In order to solve the problems of the technologies described above, the utility model provides a kind of oppositely air damper, and this air damper not easily blocks, affect little by temperature, highly versatile, and the cushion effect of the air damper pressure downward with running board descent is more consistent, better effects if.
Concrete technological scheme of the present utility model is: a kind of oppositely air damper, mainly comprise sleeve pipe, piston rod, piston body and steel pipe, described piston body is set in the lower end of described piston rod, the lower end of piston rod is located in described steel pipe, steel pipe inner carrier body with the epimere of lower part for air pressure section, hypomere is oil pressure section, the bottom of steel pipe is provided with end socket part, described casing pipe sleeve is loaded on outside piston rod, its lower end is opening and its internal diameter is greater than outer diameter of steel pipes, the inwall of steel pipe is provided with the groove identical with piston rod direction of displacement, and the groove depth of described groove from top to bottom shoals gradually, piston only is by first piston sheet, labyrinth piston and the second piston sheet are from top to bottom formed, described labyrinth piston is stepped cylindrical ring and the external diameter of its epimere is greater than the external diameter of hypomere, the external diameter of described epimere and pipe diameter adaptation, described hypomere outer wall is provided with seal ring, labyrinth piston and described seal ring are non-drive fit, seal ring external diameter and pipe diameter adaptation.
When this damping is assemblied on running board, piston rod upper, steel pipe under.When piston rod is to bottom offset, sleeve pipe and piston rod keep geo-stationary, the bottom surface of seal ring and labyrinth piston is developed, play seal action, descending gradually along with piston rod, the air-flow in steel pipe and transmission oil can only be discharged to the top of steel pipe inner carrier body from the groove steel pipe, be first that the air-flow of the air pressure section being positioned at steel pipe epimere is discharged, when piston body arrives oil pressure section, transmission oil starts to be discharged.In the continuous descending process of piston body, because the groove depth of groove is more and more shallow, therefore the sectional area of groove is more and more less, whole air-damped buffer capacity is also more and more stronger, when landing with running board, to become large trend gradually consistent greatly for pressure, and meanwhile, seal ring and labyrinth piston are non-drive fits, transmission oil is discharged by groove, and piston is not easily blocked.When temperature changes, also can reduce the impact that running board lands after oil pressure change, the oil pressure overcoming old-fashioned piston hole is constant all the time, and the oil pressure when temperature changes and board of running land the shortcoming of not getting off.In addition, when the buffer capacity of piston body in descending process constantly changes, go for different running boards, versatility is stronger.
As preferably, the groove depth of the groove of described steel pipe inner wall from top to bottom shoals gradually from the oil pressure section of steel pipe.Groove shoals gradually from oil pressure section, make piston body air-flow when air pressure section constant by the sectional area of groove, until transmission oil is diminished gradually by the sectional area of groove during oil pressure section, so be arranged so that the pressure trend that whole air damper and running board fall is fitted more, better effects if.
As preferably, the external diameter of described second piston sheet is less than described pipe diameter, and the edge of the second piston sheet is provided with breach, and described first piston sheet is circular and its external diameter is less than pipe diameter.The design of the second piston sheet breach, when piston body backhaul, air-flow or transmission oil can pass through piston body from breach fast.
As preferably, described steel pipe inner top is provided with guide pin bushing, lip-type packing and cushion collar from top to bottom successively, described guide pin bushing, lip-type packing and cushion collar are all close to steel pipe inner wall and piston column outer wall, and cushion collar outer wall is provided with groove, on steel pipe inner wall, corresponding described groove location is provided with the flange with groove adaptation.Guide pin bushing, lip-type packing and cushion collar are fixed on the inner roof wall of steel pipe, play seal action.
As preferably, the upper end of described piston rod is provided with iron joint, and the side on described iron joint is provided with locked spacer, and offside iron joint being equipped with described locked spacer side abuts with internal surface of sleeve pipe, and described locked spacer abuts with internal surface of sleeve pipe.Iron joint is connected with running board, and locked spacer relies on the elastic force of self that iron joint is abutted against and puts on inwall, the position of piston rod is fixed.
As preferably, described sleeve outer wall and outer wall of steel pipe cover have plastic sheath, and wherein said plastic sheath is close to sleeve outer wall and plastic sheath inwall does not contact with outer wall of steel pipe.Plastic sheath when piston rod movement and piston rod keep geo-stationary.
The beneficial effects of the utility model are: the utility model not easily blocks, and affect little, highly versatile by temperature, and the air-damped cushion effect pressure downward with running board descent is more consistent, better effects if.
Accompanying drawing explanation
The structural representation of the existing a kind of air damper of Tu1Shi our company;
The structural representation of the piston only of the existing a kind of air damper of Tu2Shi our company;
Fig. 3 is a kind of sectional view of steel pipe of the present utility model;
Fig. 4 is the partial enlarged drawing of piston body in Fig. 3;
Fig. 5 is a kind of structural representation of the present utility model;
Fig. 6 is a kind of structural representation of the second piston sheet in the utility model;
Fig. 7 is another kind of structural representation of the present utility model.
Reference character is: sleeve pipe 1, piston rod 2, piston body 3, steel pipe 4, guide pin bushing 5, lip-type packing 6, cushion collar 7, iron joint 8, locked spacer 9, plastic sheath 10, first piston sheet, labyrinth piston 32, second piston sheet 33, seal ring 34, air pressure section 41, oil pressure section 42, end socket part 43, groove 44.
Embodiment
Below in conjunction with embodiment, the utility model will be further described.
Embodiment 1
As shown in Figure 4: a kind of oppositely air damper, mainly comprise sleeve pipe 1, piston rod 2, piston body 3 and steel pipe 4, described piston body is set in the lower end of described piston rod, the lower end of piston rod is located in described steel pipe, as shown in Figure 5, steel pipe inner top is provided with guide pin bushing 5, lip-type packing 6 and cushion collar 7 from top to bottom successively, described guide pin bushing, lip-type packing and cushion collar are all close to steel pipe inner wall and piston column outer wall, and cushion collar outer wall is provided with groove, on steel pipe inner wall, corresponding described groove location is provided with the flange with groove adaptation.Guide pin bushing, lip-type packing and cushion collar are fixed on the inner roof wall of steel pipe, play seal action.Steel pipe inner carrier body with the epimere of lower part be air pressure section 41, hypomere is for oil pressure section 42, the bottom of steel pipe is provided with end socket part 43, described casing pipe sleeve is loaded on outside piston rod, its lower end is opening and its internal diameter is greater than outer diameter of steel pipes, as shown in Figure 3, the inwall of steel pipe is provided with the groove 44 identical with piston rod direction of displacement, and the groove depth of described groove from top to bottom shoals gradually, as shown in Figure 5, piston only is by first piston sheet 31, and labyrinth piston 32 and the second piston sheet 44 are from top to bottom formed: described first piston sheet is circular and its external diameter is less than pipe diameter; As shown in Figure 6, the external diameter of described second piston sheet is less than pipe diameter, and the edge of the second piston sheet is provided with breach; Described labyrinth piston is stepped cylindrical ring and the external diameter of its epimere is greater than the external diameter of hypomere, the external diameter of described epimere and pipe diameter adaptation, described hypomere outer wall is provided with seal ring 34, and labyrinth piston and described seal ring are non-drive fit, seal ring external diameter and pipe diameter adaptation.
The upper end of piston rod is provided with iron joint 8, and the side on described iron joint is provided with locked spacer 9, and offside iron joint being equipped with described locked spacer side abuts with internal surface of sleeve pipe, and described locked spacer abuts with internal surface of sleeve pipe.Sleeve outer wall and outer wall of steel pipe cover have plastic sheath 10, and wherein said plastic sheath is close to sleeve outer wall and plastic sheath inwall does not contact with outer wall of steel pipe.Plastic sheath when piston rod movement and piston rod keep geo-stationary.
When this damping is assemblied on running board, piston rod upper, steel pipe under.Iron joint is connected with running board, and locked spacer relies on the elastic force of self that iron joint is abutted against and puts on inwall, the position of piston rod is fixed.
During work, piston rod is to bottom offset, sleeve pipe and piston rod keep geo-stationary, the bottom surface of seal ring and labyrinth piston is developed, and plays seal action, descending gradually along with piston rod, air-flow in steel pipe and transmission oil can only be discharged to the top of steel pipe inner carrier body from the groove steel pipe, first be that the air-flow of the air pressure section being positioned at steel pipe epimere is discharged, when piston body arrives oil pressure section, transmission oil starts to be discharged.In the continuous descending process of piston body, because the groove depth of groove is more and more shallow, therefore the sectional area of groove is more and more less, whole air-damped buffer capacity is also more and more stronger, when landing with running board, to become large trend gradually consistent greatly for pressure, and meanwhile, seal ring and labyrinth piston are non-drive fits, transmission oil is discharged by groove, and piston is not easily blocked.When temperature changes, also can reduce the impact that running board lands after oil pressure change, the oil pressure overcoming old-fashioned piston hole is constant all the time, and the oil pressure when temperature changes and board of running land the shortcoming of not getting off.In addition, when the buffer capacity of piston body in descending process constantly changes, go for different running boards, versatility is stronger.
During piston body backhaul, due to the existence of the second piston sheet breach, air-flow or transmission oil can pass through piston body from breach fast, thus reach piston body quick return.
Embodiment 2
Embodiment 2 is with the difference of embodiment 1:
As shown in Figure 7, the groove depth of the groove 44 of described steel pipe 4 inwall from top to bottom shoals gradually from the oil pressure section 42 of steel pipe.Groove shoals gradually from oil pressure section, make piston body air-flow when air pressure section 41 constant by the sectional area of groove, until transmission oil is diminished gradually by the sectional area of groove during oil pressure section, so be arranged so that the pressure trend that whole air damper and running board fall is fitted more, better effects if.
The above; it is only preferred embodiment of the present utility model; not the utility model is imposed any restrictions; every above embodiment is done according to the utility model technical spirit any simple modification, change and equivalent structure transformation, all still belong to the protection domain of technical solutions of the utility model.
Claims (6)
1. a reverse air damper, mainly comprise sleeve pipe (1), piston rod (2), piston body (3) and steel pipe (4), described piston body is set in the lower end of described piston rod, the lower end of piston rod is located in described steel pipe, steel pipe inner carrier body with the epimere of lower part for air pressure section (41), hypomere is oil pressure section (42), the bottom of steel pipe is provided with end socket part (43), described casing pipe sleeve is loaded on outside piston rod, its lower end is opening and its internal diameter is greater than outer diameter of steel pipes, it is characterized in that: the inwall of steel pipe is provided with the groove (44) identical with piston rod direction of displacement, and the groove depth of described groove from top to bottom shoals gradually, piston only is by first piston sheet (31), labyrinth piston (32) and the second piston sheet (33) are from top to bottom formed, described labyrinth piston is stepped cylindrical ring and the external diameter of its epimere is greater than the external diameter of hypomere, the external diameter of described epimere and pipe diameter adaptation, described hypomere outer wall is provided with seal ring (34), labyrinth piston and described seal ring are non-drive fit, seal ring external diameter and pipe diameter adaptation.
2. oppositely air damper as claimed in claim 1, it is characterized in that, the groove depth of the groove of described steel pipe inner wall from top to bottom shoals gradually from the oil pressure section of steel pipe.
3. oppositely air damper as claimed in claim 1 or 2, it is characterized in that, the external diameter of described second piston sheet is less than described pipe diameter, and the edge of the second piston sheet is provided with breach, and described first piston sheet is circular and its external diameter is less than pipe diameter.
4. oppositely air damper as claimed in claim 3, it is characterized in that, described steel pipe inner top is provided with guide pin bushing (5), lip-type packing (6) and cushion collar (7) from top to bottom successively, described guide pin bushing, lip-type packing and cushion collar are all close to steel pipe inner wall and piston column outer wall, and cushion collar outer wall is provided with groove, on steel pipe inner wall, corresponding described groove location is provided with the flange with groove adaptation.
5. oppositely air damper as claimed in claim 4, it is characterized in that, the upper end of described piston rod is provided with iron joint (8), side on described iron joint is provided with locked spacer (9), offside iron joint being equipped with described locked spacer side abuts with internal surface of sleeve pipe, and described locked spacer abuts with internal surface of sleeve pipe.
6. oppositely air damper as claimed in claim 4, it is characterized in that, described sleeve outer wall and outer wall of steel pipe cover have plastic sheath (10), and wherein said plastic sheath is close to sleeve outer wall and plastic sheath inwall does not contact with outer wall of steel pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420803985.7U CN204358008U (en) | 2014-12-17 | 2014-12-17 | A kind of oppositely air damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420803985.7U CN204358008U (en) | 2014-12-17 | 2014-12-17 | A kind of oppositely air damper |
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| Publication Number | Publication Date |
|---|---|
| CN204358008U true CN204358008U (en) | 2015-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420803985.7U Active CN204358008U (en) | 2014-12-17 | 2014-12-17 | A kind of oppositely air damper |
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| CN (1) | CN204358008U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107355505A (en) * | 2017-04-12 | 2017-11-17 | 宁波力减震器有限公司 | Variable damping gas spring |
| CN113565914A (en) * | 2021-09-18 | 2021-10-29 | 宁波市仁龙机械有限公司 | Damping type air spring |
-
2014
- 2014-12-17 CN CN201420803985.7U patent/CN204358008U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107355505A (en) * | 2017-04-12 | 2017-11-17 | 宁波力减震器有限公司 | Variable damping gas spring |
| CN113565914A (en) * | 2021-09-18 | 2021-10-29 | 宁波市仁龙机械有限公司 | Damping type air spring |
| CN113565914B (en) * | 2021-09-18 | 2021-12-28 | 宁波市仁龙机械有限公司 | Damping type air spring |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No.66 Chunxiao xunhai Road, Beilun District, Ningbo City, Zhejiang Province Patentee after: Ningbo Yili Industrial Co.,Ltd. Address before: No.66 Chunxiao xunhai Road, Beilun District, Ningbo City, Zhejiang Province Patentee before: NINGBO YILI SHOCK ABSORBER Co.,Ltd. |