CN204783949U - Pneumatic cylinder with combination buffer - Google Patents
Pneumatic cylinder with combination buffer Download PDFInfo
- Publication number
- CN204783949U CN204783949U CN201520467716.2U CN201520467716U CN204783949U CN 204783949 U CN204783949 U CN 204783949U CN 201520467716 U CN201520467716 U CN 201520467716U CN 204783949 U CN204783949 U CN 204783949U
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- Prior art keywords
- buffer plunger
- piston
- cushion collar
- cylinder
- buffer
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Abstract
The utility model relates to a pneumatic cylinder with combination buffer, part manufacturing accuracy require lower, dismantlement convenience, sealed firm, but the replaceability is high. End the shoulder and can play the guide effect, avoid the piston jamming, compensatied centering precision and the too high shortcoming of manufacturing accuracy requirement, 2 )The restriction area of the semi -circular slotted hole on the buffer plunger steadilys decrease along the axial, and the piston is crescent at buffering in -process resistance, and consequently, the operation of piston buffering in -process is even, strikes for a short time, and in the final position, cross sectional area is very little, forms great brake force, consequently, and application position precision height, 3 )This pneumatic cylinder adopts the combination buffering, and the liquid that utilizes spring force and slotted hole to form hinders and carries out hydraulic cushion system -, makes the buffering more reliable, and the effect is better.
Description
Technical field
The utility model relates to technical field of hydraulic pressure, specifically relates to a kind of oil hydraulic cylinder with combination damping device.
Background technique
Oil hydraulic cylinder is an important component part in engineering machinery.When Driven by Hydraulic Cylinder quality is comparatively large, movement velocity faster workpiece time, generally will damping device be set.Its objective is the mechanical impact between piston and cylinder bottom eliminated because inertial force and the hydraulic coupling of moving element causes, simultaneously also in order to reduce the noise of piston liquid when changing moving direction.
Present stage, the built-in damping device of oil hydraulic cylinder commonly used was the hydraulic cushion of cylinder ring gap type and variable restrictor slot type etc.Both all utilize the buffer plunger that is connected with piston rod and and the cushion hole of cylinder bottom between gap (variable restrictor slot type orifice size linearly changes), produce throttle effect, thus realize the object of buffering.But it is long all to there is cooperation in both, high to requirement on machining accuracy, once cannot ensure accurate centering, will there will be piston clamping stagnation situation.
Model utility content
The purpose of this utility model is exactly provide a kind of novel oil hydraulic cylinder with combination damping device for the problems referred to above, the damping mechanism of this oil hydraulic cylinder is very low to requirement on machining accuracy, have spring buffer and hydraulic cushion two kinds of forms concurrently, add cushioning effect, thus, extend the working life of oil hydraulic cylinder.
The utility model is realized by following technical measures: a kind of oil hydraulic cylinder with combination damping device, comprise cylinder bottom, cylinder barrel, piston, piston rod and damping device, cylinder barrel is divided into rod chamber and rodless cavity by piston, rodless cavity is communicated with the rod end chamber of cylinder bottom, and rod end chamber is provided with oil outlet; Described damping device comprises damping spring, buffer plunger, cushion collar and only takes on; Described buffer plunger is cylindric, is connected with piston rod, uniform four the semicircle slotted eyes of buffer plunger end face circumference, and the cross sectional area of described slotted eye successively decreases vertically by buffer plunger end; Described damping spring and cushion collar are all sleeved on buffer plunger, and cushion collar internal diameter and bumper post are matched and adopted small―gap suture to coordinate, and one end of damping spring is connected with buffer plunger, and the other end withstands on cushion collar; Described only shoulder is threaded connection the end being fixed on buffer plunger; When piston rod is retracted close to cylinder barrel end, damping spring plays buffer function, and cushion collar is attached on cylinder bottom inwall, and make the rod end chamber of cylinder bottom form the space of sealing, the semicircle slotted eye on buffer plunger is communicated with rodless cavity and the oil outlet of cylinder barrel.
Described buffer plunger and piston rod integral production form.
The diameter of described cushion collar is greater than the diameter of the rod end chamber of cylinder bottom.
In hydraulic cylinder works ground process, the hydraulic oil of rodless cavity can only be flowed out by the semicircle slotted eye on buffer plunger, enter oil outlet, increase oil extraction resistance, rodless cavity is made to set up pressure, on the one hand hinder piston movement, what strengthen cushion collar and cylinder bottom inwall on the other hand is close to degree, ensures its seal.Along with piston is further close to cylinder barrel end, cushion collar slippage, makes slotted eye orifice size successively decrease, and strengthens buffer function.
The beneficial effects of the utility model are: 1) part accuracy of manufacturing requires lower, convenient disassembly, sealing firm, and replaceability is high.Only shoulder can play the guiding role, and avoids piston clamping stagnation, compensate for accuracy of alignment and accuracy of manufacturing requires too high shortcoming; 2) orifice size of the semicircle slotted eye on buffer plunger is successively decreased vertically, and piston resistance in buffering course increases gradually, therefore, runs evenly in buffer piston process, impact little, in final position, section area is very little, form larger braking force, therefore, application position precision is high; 3) this oil hydraulic cylinder adopts combination buffering, and hydraulic cushion is carried out in the liquid resistance utilizing spring force and slotted eye to be formed, and make buffering more reliable, effect is better.
Accompanying drawing explanation
Fig. 1 is the structural representation of oil hydraulic cylinder of the present utility model.
Fig. 2 is the structural representation of the utility model piston rod.
Fig. 3 is the A direction view of Fig. 2.
In figure, 1. cylinder bottom, 1-1. oil outlet, 1-2. rod end chamber, 2. cylinder barrel, 2-1. rod chamber, 2-2. rodless cavity, 3. piston, 4. piston rod, 5. damping device, 5-1. damping spring, 5-2. buffer plunger, 5-3. cushion collar, 5-4. is shoulder only.
Embodiment
In the accompanying drawings, have an oil hydraulic cylinder for combination damping device, comprise cylinder bottom 1, cylinder barrel 2, piston 3, piston rod 4 and damping device 5, cylinder barrel 2 is divided into rod chamber 2-1 and rodless cavity 2-2 by piston 3, rodless cavity 2-2 is communicated with the rod end chamber 1-2 of cylinder bottom 1, and rod end chamber 1-2 is provided with oil outlet 1-1; Described damping device 5 comprises damping spring 5-1, buffer plunger 5-2, cushion collar 5-3 and only takes on 5-4; Described buffer plunger 5-2 is cylindric, is connected with piston rod 4, and the cross sectional area of buffer plunger 5-2 end face circumference uniform four semicircle slotted eye 5-2a, described slotted eye 5-2a successively decreases vertically by buffer plunger 5-2 end; Described damping spring 5-1 and cushion collar 5-3 is all sleeved on buffer plunger 5-2, and cushion collar 5-3 internal diameter and bumper post are matched 5-2 and adopted small―gap suture to coordinate, and one end of damping spring 5-1 is connected with buffer plunger 5-2, and the other end withstands on cushion collar 5-3; Described only shoulder 5-4 is threaded connection the end being fixed on buffer plunger 5-2; When piston rod 4 is retracted close to cylinder barrel 2 end, damping spring 5-1 plays buffer function, cushion collar 5-3 is attached on cylinder bottom 1 inwall, and make the rod end chamber 1-2 of cylinder bottom 1 form the space of sealing, the semicircle slotted eye 5-2a on buffer plunger 5-2 is communicated with rodless cavity 2-2 and the oil outlet 1-1 of cylinder barrel 2.
Described buffer plunger 5-2 and piston rod 4 integral production form.
The diameter of described cushion collar 5-3 is greater than the diameter of the rod end chamber 1-2 of cylinder bottom 1.
In hydraulic cylinder works ground process, the hydraulic oil of rodless cavity 2-2 can only be flowed out by the semicircle slotted eye 5-2a on buffer plunger 5-2, enter oil outlet 1-1, increase oil extraction resistance, rodless cavity 2-2 is made to set up pressure, hinder on the one hand piston 3 to move, what strengthen cushion collar 5-3 and cylinder bottom 1 inwall on the other hand is close to degree, ensures its seal.Along with piston 3 is further close to cylinder barrel 2 end, cushion collar 5-3 slippage, makes slotted eye 5-2a orifice size successively decrease, and strengthens buffer function.
Claims (3)
1. have an oil hydraulic cylinder for combination damping device, it is characterized in that, comprise cylinder bottom, cylinder barrel, piston, piston rod and damping device, cylinder barrel is divided into rod chamber and rodless cavity by piston, and rodless cavity is communicated with the rod end chamber of cylinder bottom, and rod end chamber is provided with oil outlet; Described damping device comprises damping spring, buffer plunger, cushion collar and only takes on; Described buffer plunger is cylindric, is connected with piston rod, uniform four the semicircle slotted eyes of buffer plunger end face circumference, and the cross sectional area of described slotted eye successively decreases vertically by buffer plunger end; Described damping spring and cushion collar are all sleeved on buffer plunger, and cushion collar internal diameter and bumper post are matched and adopted small―gap suture to coordinate, and one end of damping spring is connected with buffer plunger, and the other end withstands on cushion collar; Described only shoulder is threaded connection the end being fixed on buffer plunger; When piston rod is retracted close to cylinder barrel end, damping spring plays buffer function, and cushion collar is attached on cylinder bottom inwall, and make the rod end chamber of cylinder bottom form the space of sealing, the semicircle slotted eye on buffer plunger is communicated with rodless cavity and the oil outlet of cylinder barrel.
2. a kind of oil hydraulic cylinder with combination damping device according to claim 1, it is characterized in that, described buffer plunger and piston rod integral production form.
3. a kind of oil hydraulic cylinder with combination damping device according to claim 1, it is characterized in that, the diameter of described cushion collar is greater than the diameter of the rod end chamber of cylinder bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520467716.2U CN204783949U (en) | 2015-06-30 | 2015-06-30 | Pneumatic cylinder with combination buffer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520467716.2U CN204783949U (en) | 2015-06-30 | 2015-06-30 | Pneumatic cylinder with combination buffer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204783949U true CN204783949U (en) | 2015-11-18 |
Family
ID=54524005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520467716.2U Expired - Fee Related CN204783949U (en) | 2015-06-30 | 2015-06-30 | Pneumatic cylinder with combination buffer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204783949U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109114069A (en) * | 2018-10-30 | 2019-01-01 | 济南夫驰科技有限公司 | A kind of built-in spring-compressed cushion cylinder |
| WO2023116044A1 (en) * | 2021-12-20 | 2023-06-29 | 娄底市中兴液压件有限公司 | Hydraulic cylinder, hydraulic system, and operation machinery |
-
2015
- 2015-06-30 CN CN201520467716.2U patent/CN204783949U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109114069A (en) * | 2018-10-30 | 2019-01-01 | 济南夫驰科技有限公司 | A kind of built-in spring-compressed cushion cylinder |
| WO2023116044A1 (en) * | 2021-12-20 | 2023-06-29 | 娄底市中兴液压件有限公司 | Hydraulic cylinder, hydraulic system, and operation machinery |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151118 Termination date: 20160630 |