CN202348824U - Two-stage oil cylinder applied to automobile tail plate - Google Patents
Two-stage oil cylinder applied to automobile tail plate Download PDFInfo
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- CN202348824U CN202348824U CN2011204468281U CN201120446828U CN202348824U CN 202348824 U CN202348824 U CN 202348824U CN 2011204468281 U CN2011204468281 U CN 2011204468281U CN 201120446828 U CN201120446828 U CN 201120446828U CN 202348824 U CN202348824 U CN 202348824U
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Abstract
The utility model provides a two-stage oil cylinder applied to an automobile tail plate. Free slide can be achieved between a piston and a cylinder barrel and between the piston and a piston rod. The piston serves as a two-stage cylinder barrel. The two-stage oil cylinder applied to the automobile tail plate is characterized in that in a tail-plate door-opening initial stage, effective action area of adoor-closing oil cylinder is reduced, oil return mass is reduced, and door-opening speed is accelerated. When a certain angle is obtained in the tail-plate door-opening stage, effective action area of the oil cylinder can return to normal piston area, and bearing capacity of door-closing oil cylinder is guaranteed. The two-stage oil cylinder applied to the automobile tail plate has the advantages of being high in efficiency, safe, long in service life and the like.
Description
Technical field
The utility model relates to automobile tailgate field, relates to a kind of cylinder structure that is used for the automobile tailgate particularly.
Background technique
The conventional boom-mounted tailgate all is the principle work that adopts fourbar linkage, and its fundamental diagram is referring to Fig. 1.Wherein the switch door process of tailgate is to realize through stretching of oil cylinder.Oil cylinder generally adopts one-way cylinder, and tailgate is by hydraulically powered at closing time, and promptly system gives the rodless cavity oiling of oil cylinder; Opening the door of tailgate then is the deadweight effect of leaning on big plate, and the hydraulic oil of oil cylinder rodless cavity is ejected realization.
Among Fig. 1 shown in (1a) for the big plate of tailgate is in state at closing time, this moment, big plate deadweight was very little to the opplied moment of the cylinder of closing the door, if depend merely on big plate deadweight, the velocity of discharge of hydraulic oil can be very slow in the cylinder rodless cavity of closing the door.Therefore, a power assistant spring can be installed all in oil cylinder generally, the sectional structure chart of oil cylinder is referring to accompanying drawing 2; Oil cylinder comprises cylinder barrel 1, piston 2 and piston rod 3, and an end of cylinder barrel is communicated with hydraulic system, and the other end is provided with guide sleeve 4; Piston 2 is fixed on the apical position of piston rod 3, in the rod chamber of cylinder barrel 1, is provided with power assistant spring 5, and rod chamber is in communication with the outside through vent 6; In the starting stage that big plate opens the door, add quick operating valve speed by the elastic force of power assistant spring 5.Opening the door at big plate reaches several angle, and shown in (1b) among Fig. 1, big plate deadweight relies on big plate deadweight after the opplied moment of oil cylinder is increased again, realizes that big plate opens the door to level, shown in (1c) among Fig. 1.
The defective of existing technology is:
1, big plate is in the whole process of opening the door, and the stressed of oil cylinder is different, and in the starting stage that big plate opens the door, even by means of power assistant spring, its active force is also smaller, and the speed of opening the door is relatively slow.Only opening the door at big plate reaches several angle, and after the opplied moment increase of big plate deadweight to the cylinder of closing the door, the speed of opening the door could be accelerated gradually.Oil cylinder to the less tailgate of some plate face or cylinder diameter are bigger is especially true.
2, the tradition oil cylinder of closing the door is an one-way cylinder, and at rod chamber power assistant spring has been installed, and at the ventilating hole of rod chamber muffler or inhalation valve is housed generally.But owing to muffler easy ageing, breakage, the inhalation valve filter precision is lower again.Under bad working environments, steam, dust very easily get into the rod chamber of oil cylinder, cause spring to get rusty, rupture, and cylinder barrel scratches, and problems such as sealing part abrasion finally make the oil cylinder leakage of oil, scrap.
The model utility content
The utility model is for solving the problems of the technologies described above, and provides that a kind of efficient is higher, the twin-stage oil cylinder that is used for the automobile tailgate of longer service life.
The utility model realizes that the technological scheme that goal of the invention adopts is: a kind of twin-stage oil cylinder that is used for the automobile tailgate; Comprise cylinder barrel, be arranged on piston and piston rod in the cylinder barrel, an end of cylinder barrel is communicated with hydraulic system, and the other end is provided with guide sleeve; Be provided with vent in the said guide sleeve; Also comprise spring seat, power assistant spring, back-up ring and spacer, said piston activity is nested on the said piston rod, is tightly connected between piston and the piston rod and between piston and the inner wall of cylinder; Said spring seat and power assistant spring are arranged on having in the oil pocket between piston and the hydraulic system; Said spring seat is fixed on the piston rod, and said power assistant spring compression is fixed between spring seat and the piston, and said back-up ring and spacer are arranged in the no oil pocket between piston and the guide sleeve; Said back-up ring is fixed on the said piston rod, and said spacer activity is nested on the piston rod.
Better, the outer wall of said guide sleeve is provided with the outer ring groove, and said vent is made up of entrance and outlet section, and said entrance and outlet section are communicated with said outer ring groove respectively, is filled with the gas permeability filtering material in the said outer ring groove.
Better, the inwall of said guide sleeve is provided with interior annular groove, is filled with the gas permeability filtering material in the said interior annular groove.
Better, said gas permeability filtering material is a felt.
Better, said piston outer wall is provided with combined seal ring, and piston is tightly connected through combined seal ring and inner wall of cylinder.
Better, said piston inner wall is provided with the U-shaped circle, and piston is connected with rod seal through the U-shaped circle.
Better, said piston and said spring seat are provided with boss, and said power assistant spring does not contact with said piston rod, and said power assistant spring does not contact with inner wall of cylinder.
Better, said guide sleeve adopts with cylinder barrel and is threaded, and is provided with dust ring between guide sleeve and the piston rod.
Better, the outer wall of said spacer is provided with the outer ring groove, and inwall is provided with interior annular groove, is filled with the gas permeability filtering material in said outer ring groove and the interior annular groove.Said gas permeability filtering material is a felt.
The beneficial effect of the utility model is:
1, in the oil cylinder of the utility model, between piston and the cylinder barrel, all can be free to slide between piston and the piston rod, the piston has here served as the effect of a secondary cylinder barrel, is a twin-stage one-way cylinder of having simplified.Be characterized in: open the door the initial stage at tailgate, the effective active area of the oil cylinder that reduced to close the door reduces recirculating oil quantity, has accelerated the speed of opening the door.Tailgate open the door reach several angle after, the effective active area of oil cylinder can return to normal piston area again, the bearing capacity of the oil cylinder that guarantees to close the door.
2, in the utility model, power assistant spring is installed in having in the oil pocket of oil cylinder, boss is all arranged on spring seat and the piston; Guaranteeing that power assistant spring does not produce with piston rod or cylinder barrel contacts, and scratches its surface, and has hydraulic oil is arranged in the oil pocket; Power assistant spring is immersed in the oil, can not get rusty, rupture.
3, in the utility model; Change its ventilation device into labyrinth and add felt formula structure, by the ventilation mouth of outside, through breeder tube to the annular groove that is filled with felt; Again through the no oil pocket of inboard breeder tube to oil cylinder; Prolonged scavenge duct length greatly, felt can stop moisture, dust to get into, and avoids causing cylinder barrel to get rusty.
4, in the utility model; Between piston and guide sleeve, increased a spacer; Can play position-limiting action to piston on the one hand, also all be designed with the annular groove that is filled with felt on the other hand on the cylindrical of spacer and the endoporus, can prevent to have got into the dust of no oil pocket; Get into again on the seal ring of piston, avoid the wearing and tearing of seal ring and the scuffing of inner wall of cylinder.
Description of drawings
Fig. 1, the fundamental diagram of existing conventional boom-mounted tailgate.
Fig. 2, the sectional structure chart of oil cylinder in the existing conventional boom-mounted tailgate.
Fig. 3, the sectional structure chart of the utility model oil cylinder.
Fig. 4, the partial structurtes enlarged view of guide sleeve.
Fig. 5, the fundamental diagram of the utility model.
Among the figure, annular groove, 5 power assistant spring, 6 vents, 61 vent entrances, 62 vent outlet sections, 7 spring seats, 8 back-up rings, 9 spacers, 91 outer ring grooves, 92 interior annular grooves, 10 combined seal rings, 11U shape circle, 12 dust rings in 1 cylinder barrel, 2 pistons, 3 piston rods, 4 guide sleeves, the 41 outer ring grooves, 42.
Embodiment
Below in conjunction with accompanying drawing the utility model is elaborated.
A kind of twin-stage oil cylinder that is used for the automobile tailgate, sectional structure chart are referring to accompanying drawing 3, and accompanying drawing 4 is the partial structurtes enlarged view of guide sleeve.The twin-stage oil cylinder comprises cylinder barrel 1, is arranged on piston 2 and piston rod 3 in the cylinder barrel 1; One end of cylinder barrel is communicated with hydraulic system, and the other end is provided with guide sleeve 4, also comprises power assistant spring 5, vent 6, spring seat 7, back-up ring 8 and spacer 9; Piston 2 activities are nested on the piston rod 3; Be tightly connected between piston 2 and the piston rod 3 and between piston 2 and cylinder barrel 1 inwall, spring seat 7 and power assistant spring 5 are arranged on having in the oil pocket between piston 2 and the hydraulic system, and spring seat 7 is fixed on the piston rod 3; Power assistant spring 5 compressions are fixed between spring seat 7 and the piston 2; Back-up ring 8 and spacer 9 are arranged in the no oil pocket between piston 2 and the guide sleeve 4, and back-up ring 8 is fixed on the piston rod 3, and spacer 9 activities are nested on the piston rod 3.
In the utility model, the partial structurtes enlarged view of guide sleeve 4 is referring to accompanying drawing 4, and the outer wall of guide sleeve 4 is provided with outer ring groove 41; Inwall is provided with interior annular groove 42; Vent 6 is made up of entrance 61 and outlet section 62, and entrance 61 is breeder tube with outlet section 62, and entrance 61 is communicated with outer ring groove 41 respectively with outlet section 62; Be filled with felt in the outer ring groove 41, also be filled with felt in the interior annular groove 42.
The outer wall of piston 2 is provided with combined seal ring 10, and piston 2 is connected with the inner wall sealing of cylinder barrel 1 through combined seal ring 10.The inwall of piston 2 is provided with U-shaped circle 11, and piston 2 is tightly connected through U-shaped circle 11 and piston rod 3.
Piston 2 is provided with boss with spring seat 7, through the setting of boss, power assistant spring 5 is not contacted with piston rod 3, and power assistant spring 5 does not contact with the inwall of cylinder barrel 1.
The outer wall of spacer 9 is provided with outer ring groove 91, and inwall is provided with interior annular groove 92, is filled with gas permeability filtering material felt in outer ring groove 91 and the interior annular groove 92.
The fundamental diagram of the utility model is referring to Fig. 5 a-c, and its detailed process is:
1, the withdrawal process of oil cylinder (be tailgate open the door process): when the big plate of tailgate is in when closing the door state; The piston rod 3 of oil cylinder is in the state that stretches out fully; Shown in Fig. 5 (c), though this moment, big plate deadweight had only very little opplied moment to oil cylinder, the power assistant spring 5 of oil cylinder is in complete compressive state; Under big plate and power assistant spring 5 actings in conjunction, piston rod 3 is regained.The lifting surface area of oil cylinder is merely the area of piston rod 3 at this moment, and the recirculating oil quantity of oil cylinder is less, and oil return speed is very fast, and the more common oil cylinder of closing the door of speed that therefore opens the door is a lot of soon.
When piston rod 3 is retracted to back-up ring 8 and touches piston 2; Shown in Fig. 5 (b), power assistant spring 5 is not just working to the withdrawal of piston rod 3, and this moment, the lifting surface area of oil cylinder was the area of piston 2; And big plate opened the door and reached several angle this moment; Big plate deadweight increases the opplied moment of oil cylinder, and therefore the speed of opening the door can not become very slow yet, can guarantee the bearing capacity of oil cylinder simultaneously.
2, the process of stretching out of oil cylinder (be tailgate close the door process): when the big plate of tailgate is in door opening state; The piston rod 3 of oil cylinder of closing the door is in complete retracted mode; Shown in Fig. 5 (a), when system gives when closing the door the oil cylinder fuel feeding, hydraulic oil all plays a driving role to piston 2, piston rod 3; Promote piston rod 3 and stretch out, realize closing the door action.
When piston 2 moves to when withstanding spacer 9, shown in Fig. 5 (b), piston 2 stop motions; This moment, hydraulic oil continued piston rod 3 is played a driving role, and made power assistant spring 5 compressions, until the oil cylinder of closing the door piston rod 3 all stretch out; Till the big plate door-closing in-place, shown in Fig. 5 (c).
What should explain at last is: above embodiment only in order to the explanation the utility model and and unrestricted technological scheme described in the invention; Therefore, it will be understood by those of skill in the art that still and can make amendment or be equal to replacement the utility model although this specification has carried out detailed explanation with reference to each above-mentioned embodiment to the utility model; And all do not break away from the technological scheme and the improvement thereof of the spirit and the scope of the utility model, and it all should be encompassed in the claim scope of the utility model.
Claims (10)
1. a twin-stage oil cylinder that is used for the automobile tailgate comprises cylinder barrel, is arranged on piston and piston rod in the cylinder barrel, and an end of cylinder barrel is communicated with hydraulic system; The other end is provided with guide sleeve, is provided with vent in the said guide sleeve, it is characterized in that: also comprise spring seat, power assistant spring, back-up ring and spacer; Said piston activity is nested on the said piston rod; Be tightly connected between piston and the piston rod and between piston and the inner wall of cylinder, said spring seat and power assistant spring are arranged on having in the oil pocket between piston and the hydraulic system, and said spring seat is fixed on the piston rod; Said power assistant spring compression is fixed between spring seat and the piston; Said back-up ring and spacer are arranged in the no oil pocket between piston and the guide sleeve, and said back-up ring is fixed on the said piston rod, and said spacer activity is nested on the piston rod.
2. the twin-stage oil cylinder that is used for the automobile tailgate according to claim 1; It is characterized in that: the outer wall of said guide sleeve is provided with the outer ring groove; Said vent is made up of entrance and outlet section; Said entrance and outlet section are communicated with said outer ring groove respectively, are filled with the gas permeability filtering material in the said outer ring groove.
3. the twin-stage oil cylinder that is used for the automobile tailgate according to claim 2, it is characterized in that: the inwall of said guide sleeve is provided with interior annular groove, is filled with the gas permeability filtering material in the said interior annular groove.
4. according to claim 2 or the 3 described twin-stage oil cylinders that are used for the automobile tailgate, it is characterized in that: said gas permeability filtering material is a felt.
5. the twin-stage oil cylinder that is used for the automobile tailgate according to claim 1, it is characterized in that: said piston outer wall is provided with combined seal ring, and piston is tightly connected through combined seal ring and inner wall of cylinder.
6. the twin-stage oil cylinder that is used for the automobile tailgate according to claim 1, it is characterized in that: said piston inner wall is provided with the U-shaped circle, and piston is connected with rod seal through the U-shaped circle.
7. the twin-stage oil cylinder that is used for the automobile tailgate according to claim 1 is characterized in that: said piston and said spring seat are provided with boss, and said power assistant spring does not contact with said piston rod, and said power assistant spring does not contact with inner wall of cylinder.
8. the twin-stage oil cylinder that is used for the automobile tailgate according to claim 1 is characterized in that: said guide sleeve adopts with cylinder barrel and is threaded, and is provided with dust ring between guide sleeve and the piston rod.
9. the twin-stage oil cylinder that is used for the automobile tailgate according to claim 1; It is characterized in that: the outer wall of said spacer is provided with the outer ring groove; Inwall is provided with interior annular groove, is filled with the gas permeability filtering material in said outer ring groove and the interior annular groove.
10. the twin-stage oil cylinder that is used for the automobile tailgate according to claim 9 is characterized in that: said gas permeability filtering material is a felt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204468281U CN202348824U (en) | 2011-11-11 | 2011-11-11 | Two-stage oil cylinder applied to automobile tail plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204468281U CN202348824U (en) | 2011-11-11 | 2011-11-11 | Two-stage oil cylinder applied to automobile tail plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202348824U true CN202348824U (en) | 2012-07-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204468281U Expired - Fee Related CN202348824U (en) | 2011-11-11 | 2011-11-11 | Two-stage oil cylinder applied to automobile tail plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202348824U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103343763A (en) * | 2013-07-30 | 2013-10-09 | 煤炭科学研究总院 | Bidirectional single-flexible hydraulic cylinder |
| CN107725503A (en) * | 2017-04-28 | 2018-02-23 | 深圳市畅安达精密工业有限公司 | A kind of oil cylinder structure of hydraulic and hydraulic system with spring assist |
| CN111237367A (en) * | 2020-01-13 | 2020-06-05 | 佛山科学技术学院 | Electromagnetic adjustable shock absorber |
| CN113090607A (en) * | 2021-03-18 | 2021-07-09 | 湖南联诚轨道装备有限公司 | High-pressure hydraulic oil cylinder and method for prolonging sealing life of high-pressure hydraulic oil cylinder |
| CN113983025A (en) * | 2021-08-23 | 2022-01-28 | 柳州双吉机械股份有限公司 | Novel hydraulic tail plate single-action oil cylinder |
-
2011
- 2011-11-11 CN CN2011204468281U patent/CN202348824U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103343763A (en) * | 2013-07-30 | 2013-10-09 | 煤炭科学研究总院 | Bidirectional single-flexible hydraulic cylinder |
| CN107725503A (en) * | 2017-04-28 | 2018-02-23 | 深圳市畅安达精密工业有限公司 | A kind of oil cylinder structure of hydraulic and hydraulic system with spring assist |
| CN107725503B (en) * | 2017-04-28 | 2024-02-02 | 深圳甄创科技有限公司 | Hydraulic cylinder structure with spring assistance and hydraulic system |
| CN111237367A (en) * | 2020-01-13 | 2020-06-05 | 佛山科学技术学院 | Electromagnetic adjustable shock absorber |
| CN113090607A (en) * | 2021-03-18 | 2021-07-09 | 湖南联诚轨道装备有限公司 | High-pressure hydraulic oil cylinder and method for prolonging sealing life of high-pressure hydraulic oil cylinder |
| CN113983025A (en) * | 2021-08-23 | 2022-01-28 | 柳州双吉机械股份有限公司 | Novel hydraulic tail plate single-action oil cylinder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120725 Termination date: 20151111 |
|
| EXPY | Termination of patent right or utility model |