CN203081896U - Servo hydrocylinder - Google Patents
Servo hydrocylinder Download PDFInfo
- Publication number
- CN203081896U CN203081896U CN 201320092838 CN201320092838U CN203081896U CN 203081896 U CN203081896 U CN 203081896U CN 201320092838 CN201320092838 CN 201320092838 CN 201320092838 U CN201320092838 U CN 201320092838U CN 203081896 U CN203081896 U CN 203081896U
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- oil
- servo
- guide sleeve
- piston rod
- cylinder body
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Abstract
The utility model discloses a servo hydrocylinder. The servo hydrocylinder comprises a cylinder body, a piston, a piston rod, a pair of guiding sleeves and first sealing pieces, wherein the outer surface of the cylinder body is provided with a first oil discharging hole and a first oil filling hole which are communicated with an inner cavity of the cylinder body; the piston is arranged in the inner cavity of the cylinder body and can axially do a reciprocating motion, and the inner cavity of the cylinder body is divided into two independent parts; the piston rod is fixedly connected to the piston, and the two ends of the piston rod respectively penetrate out of the two ends of the cylinder body; the guiding sleeves are arranged on the two ends of the cylinder body and sleeved on the piston rod and are provided with a second oil filling hole and a second oil discharging hole, the second oil filling hole is communicated with the first oil filling hole, the second oil discharging hole is communicated with the first oil discharging hole, and oil sealing surfaces are formed among the inner walls of the guiding sleeves and the outer surface of the piston rod; the first sealing pieces are arranged among the outer surface of the piston rod and the inner walls of the guiding sleeves; and the oil sealing surfaces are used for separating the first sealing pieces from the inner cavity of the cylinder body. The servo hydrocylinder provided by the utility model has the advantages that the abrasion between the piston rod and the guiding sleeves is effectively reduced, stable sealing is realized, and the service life is longer.
Description
Technical field
The utility model relates to a kind of hydraulic jack, particularly a kind of servo-hydraulic oil cylinder.
Background technique
The servo-hydraulic oil cylinder of prior art, piston rod directly contacts with guide sleeve, in running, rub owing to long-time between piston rod and guide sleeve, wear problem appears easily, especially under the high speed to-and-fro motion, as the to-and-fro motion under the 200HZ, wearing and tearing between piston rod and the guide sleeve are even more serious, cause servo-hydraulic oil cylinder working efficiency to reduce even occur the problem of collapse.Simultaneously, piston rod contacts with the hydraulic oil direct and that cylinder body is interior of first Sealing energy between guide sleeve, in servo-hydraulic oil cylinder running, can be subjected to the active force of hydraulic oil, first Sealing is under the working environment of high pressure, is easy to generate wearing and tearing, heating even damage, causes sealing effect to descend even the loss of seal performance, the problem that hydraulic oil leaks occurs, reduced the working efficiency of servo-hydraulic oil cylinder and shortened working life of servo-hydraulic oil cylinder.
The model utility content
The purpose of this utility model is to provide a kind of can reduce the wearing and tearing that cause owing to friction between piston rod and guide sleeve effectively, can realize stable sealing again, the servo-hydraulic oil cylinder that working life is long.
According to an aspect of the present utility model, a kind of servo-hydraulic oil cylinder is provided, comprising:
Cylinder body, outer surface are provided with the first draining hole, first oil hole that communicates with inner chamber of cylinder block;
Piston is built in inner chamber of cylinder block and can does axially reciprocating, and inner chamber of cylinder block is separated into two independent parts;
Piston rod is fixed on the piston, and its two ends pass the two ends of cylinder body respectively;
A pair of guide sleeve, be located at cylinder body two ends and cover and be through on the piston rod, be provided with second oil hole and the second draining hole, second oil hole communicates with first oil hole, the second draining hole communicates with the first draining hole, forms oil sealing surface between the inwall of guide sleeve and the piston rod outer surface;
First Sealing is located between the outer surface and guide sleeve inwall of piston rod, and oil sealing surface separates first Sealing and inner chamber of cylinder block.
Form oil sealing surface between piston rod outer surface and the guide sleeve inwall, form suspension by first oil hole toward oil sealing surface injection pressure lubricant oil, between piston rod outer surface and guide sleeve, form the static pressure oil film, guide sleeve inwall and piston rod outer surface are separated fully, reduced the relative friction between piston rod and guide sleeve significantly, reduced wearing and tearing between the two, improved the stability of a kind of servo-hydraulic oil cylinder of the utility model work and prolonged working life.Simultaneously, in a kind of servo-hydraulic oil cylinder operation of the utility model working procedure, the static pressure oil film separates the hydraulic oil in first Sealing and the inner chamber of cylinder block, make the Sealing of winning be in lower working pressure, the problem of having avoided first Sealing to be prone to wearing and tearing, heating even to damage effectively, strengthened the sealing effect of first Sealing, and then improved the stability of a kind of servo-hydraulic oil cylinder of the utility model work and prolonged working life.
In some embodiments, the guide sleeve inwall is provided with and the corresponding one by one oil pocket that communicates of second oil hole, and the oil pocket number is an even number, is symmetrically distributed on the inwall of guide sleeve.Oil pocket is corresponding one by one with second oil hole, makes pressure lubrication oil to enter into equably in the oil pocket, is beneficial to the formation of static pressure oil film; The number of oil pocket is an even number, be symmetrically distributed on the inwall of guide sleeve, make when piston rod is subjected to radial load, pressure difference can appear between the relative oil pocket, this pressure difference and radial load balance, make piston rod still be in the central authorities of cylinder body, improved the stability of a kind of servo-hydraulic oil cylinder of the utility model work thus.
In some embodiments, can also be provided with first oil groove that is communicated with first oil hole and second oil hole on the outer surface of guide sleeve.Avoided thus owing to producing or assembly error causes first oil hole and the existence of second oil hole to not going up or problems of missing aim influences pressure lubrication oil and enters smoothly, and then influence the formation of static pressure oil film, improved the stability of a kind of servo-hydraulic oil cylinder of the utility model work thus.
In some embodiments, the outer surface of guide sleeve can be provided with second oil groove that is communicated with the first draining hole and the second draining hole.The quantity in the draining hole of winning is lacked also than the quantity in the second draining hole can be realized releasing smoothly of pressure lubrication oil, reduced the difficulty of cylinder body production and processing, improve the practicability of a kind of servo-hydraulic oil cylinder of the utility model thus.
In some embodiments, piston rod can in be hollow.Can reduce the weight of piston rod thus, improve the dynamic performance of piston rod, can reduce the wearing and tearing between piston rod and guide sleeve effectively, thereby improve the stability of a kind of servo-hydraulic oil cylinder of the utility model work and prolonged working life.
In some embodiments, can also comprise a pair of end cap that is located at the cylinder body two ends, the tight pressing of end cap and guide sleeve makes that guide sleeve can not axially move when piston rod moves outside cylinder body.It is removable to make that thus guide sleeve can be designed as, and conveniently carries out inspection and maintenance.
In some embodiments, can be provided with the oil trap that communicates with the second draining hole on the inwall of guide sleeve.Make pressure lubrication oil flow through thus and can be integrated into place, the second draining hole behind the oil sealing surface, be convenient to pressure lubrication oil and release smoothly, improved the stability of a kind of servo-hydraulic oil cylinder of the utility model work.
In some embodiments, can be provided with second Sealing between piston and cylinder body.Second Sealing has sealed the gap between piston and the cylinder barrel, prevents to leak in the hydraulic oil, has improved the stability of a kind of servo-hydraulic oil cylinder of the utility model work.
In some embodiments, first Sealing and second Sealing can be in the combined type packing ring of O shape circle, Y shape circle, v shaped ring or rubber material and low-friction material and usefulness any.Can select for use according to actual needs, improve the practicability of a kind of servo-hydraulic oil cylinder of the utility model.
In some embodiments, can be provided with the 3rd Sealing between guide sleeve and cylinder body.The 3rd Sealing has sealed the gap between guide sleeve and the cylinder body, prevents that hydraulic oil from leaking outside, and has improved the stability of a kind of servo-hydraulic oil cylinder of the utility model work.
Description of drawings
Fig. 1 is the section of structure of a kind of servo-hydraulic oil cylinder of a kind of mode of execution of the utility model.
Fig. 2 is the sectional view of Fig. 1 along the A-A line.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail.
Fig. 1 has schematically shown a kind of servo-hydraulic oil cylinder according to a kind of mode of execution of the present utility model.As shown in Figure 1, this servo-hydraulic oil cylinder comprises cylinder body 1, piston 2, piston rod 3, a pair of guide sleeve 4, first Sealing 5.In addition, also comprise a pair of end cap 6, second Sealing 7 and the 3rd Sealing 8.
The outer surface of cylinder body 1 is provided with first oil hole 101, the first draining hole 102, first oil through 103 and second oil through 104 that communicates with inner chamber.Piston 2 is built in cylinder body 1 inner chamber, and its outer surface and cylinder body 1 inwall fit tightly, and being separated into cylinder body 1 inner chamber independently, the first appearance oil pocket 105 and second holds oil pocket 106.First oil through 103 and first holds oil pocket 105 and communicates, and second oil through 104 and second holds oil pocket 106 and communicates.In the present embodiment, piston rod 3 is integrative-structures with piston 2, and piston rod 3 two ends pass the two ends of cylinder body 1 respectively.In other embodiments, piston rod 3 can be to connect or the mode that is threaded is fixed on the piston 2 by semi-ring.
A pair of cover is through the two ends that guide sleeve 4 on the piston rod 3 is fixedly connected on cylinder body 1, lays respectively at first and holds oil pocket 105 and second and hold in the oil pocket 106.
As shown in Figure 2, form oil sealing surface 9 between the inwall of guide sleeve 4 and piston rod 3 outer surfaces.
In the present embodiment, being to make guide sleeve 4 fixedly connected with cylinder body 1 by be provided with end cap 6 at cylinder body 1 two ends, specifically, is exactly the end that an end of the fixing part 401 of guide sleeve 4 is closely pressed together on cylinder body 1, when making piston rod 3 operations, guide sleeve 4 can not axially move to cylinder body 1 inner chamber.End cap 6 is pressed together on the other end of guide sleeve 4 fixing parts 401, and when making piston rod 3 operations, guide sleeve 4 can not axially move outside cylinder body 1.In other embodiments, guide sleeve 4 can be by welding with the Placement of cylinder body 1 or be threaded that perhaps guide sleeve 4 is an integrative-structure with cylinder body 1.
In the present embodiment, end cap 6 is to fixedly connected with cylinder body 1 by the flange ways of connecting, in other embodiments, also can be by welding, be threaded or Placement such as pull bar connection.
Offer second oil hole 402 on the guide sleeve 4 and the second draining hole, 403, the second oil holes 402 communicate with first oil hole 101, second draining, 402 holes communicate with the first draining hole 102.
8 sockets of the 3rd Sealing are through in the sealed groove on guide sleeve 4 outer surfaces, between guide sleeve 4 outer surfaces and cylinder body 1 inwall.
When holding oil pocket 105 injection hydraulic oil by first oil through 103 toward first, piston 2 drives piston rods 3 and axially moves to second oil pocket 106.When holding oil pocket 106 injection hydraulic oil by second oil through 104 past second, piston 2 drive piston rods 3 are yearned for the first appearance oil pocket 105 and are axially moved.Thereby realize that piston 2 drives piston rod 3 and does axially reciprocating.
In the piston rod 3 is hollow, is hollow stem.Can reduce the weight of piston rod 3 thus, improve the dynamic performance of piston rod 3, can reduce the wearing and tearing of 4 of piston rod 3 and guide sleeves effectively, thereby improve the stability and the working life of the work of a kind of servo-hydraulic oil cylinder of the utility model.
As shown in Figure 2, have on guide sleeve 4 inwalls and the corresponding one by one oil pocket that communicates 404 of second oil hole 402.The quantity of oil pocket 404 is even number, is generally four, six or eight, in the present embodiment, is six, is symmetrically distributed on the inwall of guide sleeve 4.
The quantity of second oil hole 402 is consistent and corresponding one by one with the quantity of oil pocket 404.Can realize that thus pressure lubrication oil can evenly be attached to the outer surface of piston rod 3, be convenient to the static pressure oil film and form smoothly, improve the stability of a kind of servo-hydraulic oil cylinder of the utility model work.
Has first oil groove 405 that is communicated with first oil hole 101 and second oil hole 402 on the outer surface of guide sleeve 4.The oil hole 101 of winning is connected with the second all oil holes 402, avoided owing to producing or assembly error causes first oil hole 101 and 402 existence of second oil hole to not going up or problems of missing aim influences pressure lubrication oil and enters smoothly, and then influence the formation of static pressure oil film, improved the stability of a kind of servo-hydraulic oil cylinder of the utility model work thus.Simultaneously, the quantity that also makes the quantity of the oil hole 101 of winning be less than second oil hole 402 also can realize the smooth injection of pressure lubrication oil.Can reduce the difficulty of cylinder body 1 production and processing thus, thereby improve the practicability of a kind of servo-hydraulic oil cylinder of the utility model.
The outer surface of guide sleeve 4 has second oil groove 406 that is communicated with the first draining hole 102 and the second draining hole 403.The quantity that makes the quantity in the draining hole 102 of winning be less than the second draining hole 403 thus also can realize releasing smoothly of pressure lubrication oil.Can reduce the difficulty of cylinder body 1 production and processing thus, thereby improve the practicability of a kind of servo-hydraulic oil cylinder of the utility model.
Has the oil trap 407 that communicates with the second draining hole 402 on the inwall of guide sleeve 4, oil trap 407 communicates with oil sealing surface 9, make pressure lubrication oil flow through and to be integrated into 402 places, the second draining hole behind the oil sealing surface 9, be convenient to pressure lubrication oil and release smoothly, improved the stability of a kind of servo-hydraulic oil cylinder of the utility model work.
The 3rd Sealing 8 can be in y-shaped ring, U-shaped seal ring, O shape RunddichtringO or the v-ring any.In the present embodiment, be O shape RunddichtringO.
When a kind of servo-hydraulic oil cylinder of the utility model uses, the pressure lubrication oil that will have certain pressure by oil supply system constantly pumps into from first oil hole 101, pressure lubrication oil flow through first oil groove 405, second oil through 402, enter oil pocket 404, piston rod 3 is pushed to the central authorities of cylinder body 1, in oil sealing surface 9, form the static pressure oil film, the oil sealing surface 9 of flowing through then, oil pressure reduces near zero, enter into oil trap 407 again, by the second draining hole 403, second oil groove 406 and the first draining hole 102, get back to the fuel tank in the oil supply system, form the circulation of pressure lubrication oil.When piston rod 3 was not subjected to load, then the oil pressure in each oil pocket 404 was identical, and piston rod 3 is in the central authorities of cylinder body 1.When piston rod 3 is subjected to the radial load of any direction, piston rod 3 produces micro-displacement (micron order), pressure difference can occur between the relative oil pocket, pressure difference occurs between the relative oil pocket 404, this pressure difference and radial load balance make piston rod 3 still be in the central authorities of cylinder body 1.Pump into hydraulic oil toward first oil through 103 or second oil through 104 respectively, can realize that piston 2 drives piston rod 3 and carries out axially reciprocating, realize control outside actuator.
In the process of a kind of servo-hydraulic oil cylinder operation of the utility model, especially when carrying out high-frequency operation, as the to-and-fro motion under the 200HZ, all the time isolated by the static pressure oil film between guide sleeve 4 and the piston rod 3, form liquid friction between the two, it is less to wear and tear, and improves working stability and has prolonged working life.The static pressure oil film separates the hydraulic oil in first Sealing 5 and cylinder body 1 inner chamber, the Sealing 5 of winning is under the extremely low pressure in servo-hydraulic oil cylinder working procedure all the time, avoid first Sealing 5 owing to the problem of wearing and tearing, generating heat even damaging appears in the pressure that is subjected to hydraulic oil effectively, therefore can realize stable sealing.
Above-described only is mode of executions more of the present utility model.For the person of ordinary skill of the art, under the prerequisite that does not break away from the utility model creation design, can also make some distortion and improvement, these all belong to protection domain of the present utility model.
Claims (10)
1. a servo-hydraulic oil cylinder is characterized in that, comprising:
Cylinder body, outer surface are provided with the first draining hole, first oil hole that communicates with inner chamber of cylinder block;
Piston is built in described inner chamber of cylinder block and can does axially reciprocating, and described inner chamber of cylinder block is separated into two independent parts;
Piston rod is fixed on the described piston, and its two ends pass the two ends of described cylinder body respectively;
A pair of guide sleeve, being located at described cylinder body two ends and cover is through on the described piston rod, be provided with second oil hole and the second draining hole, described second oil hole communicates with first oil hole, the described second draining hole communicates with the first draining hole, forms oil sealing surface between the inwall of described guide sleeve and the described piston rod outer surface;
First Sealing is located between the outer surface and described guide sleeve inwall of described piston rod, and described oil sealing surface separates described first Sealing and described inner chamber of cylinder block.
2. a kind of servo-hydraulic oil cylinder according to claim 1 is characterized in that, described guide sleeve inwall is provided with and the corresponding one by one oil pocket that communicates of described second oil hole, and described oil pocket number is an even number, is symmetrically distributed on the inwall of guide sleeve.
3. a kind of servo-hydraulic oil cylinder according to claim 2 is characterized in that, the outer surface of described guide sleeve is provided with first oil groove that is communicated with described first oil hole and described second oil hole.
4. a kind of servo-hydraulic oil cylinder according to claim 3 is characterized in that, the outer surface of described guide sleeve is provided with second oil groove that is communicated with described first draining hole and the described second draining hole.
5. a kind of servo-hydraulic oil cylinder according to claim 4 is characterized in that, is hollow in the described piston rod.
6. according to each described a kind of servo-hydraulic oil cylinder of claim 1-5, it is characterized in that, also comprise a pair of end cap that is located at described cylinder body two ends, described end cap and the tight pressing of described guide sleeve, make that described guide sleeve can not axially move when described piston rod moves outside described cylinder body.
7. a kind of servo-hydraulic oil cylinder according to claim 6 is characterized in that, the inwall of described guide sleeve is provided with the oil trap that communicates with the described second draining hole.
8. a kind of servo-hydraulic oil cylinder according to claim 7 is characterized in that, is provided with second Sealing between described piston and described cylinder body.
9. a kind of servo-hydraulic oil cylinder according to claim 8 is characterized in that, described first Sealing and second Sealing are in the combined type packing ring of O shape circle, Y shape circle, v shaped ring or rubber material and low-friction material and usefulness any.
10. a kind of servo-hydraulic oil cylinder according to claim 9 is characterized in that, is provided with the 3rd Sealing between described guide sleeve and described cylinder body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320092838 CN203081896U (en) | 2013-02-28 | 2013-02-28 | Servo hydrocylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320092838 CN203081896U (en) | 2013-02-28 | 2013-02-28 | Servo hydrocylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203081896U true CN203081896U (en) | 2013-07-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320092838 Withdrawn - After Issue CN203081896U (en) | 2013-02-28 | 2013-02-28 | Servo hydrocylinder |
Country Status (1)
| Country | Link |
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| CN (1) | CN203081896U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103174699A (en) * | 2013-02-28 | 2013-06-26 | 韶关市伟光液压油缸有限公司 | Servo hydraulic cylinder |
| CN104454765A (en) * | 2014-12-31 | 2015-03-25 | 太原科技大学 | Designing method of constant-pressure oil supply type load-deflection resistance horizontal type servo oil cylinder |
| CN104895866A (en) * | 2015-06-18 | 2015-09-09 | 合肥合锻机床股份有限公司 | Equal-speed equal-stroke high frequency response double-acting cylinder |
| CN111608985A (en) * | 2020-06-02 | 2020-09-01 | 香河凯华齿轮有限公司 | Gear punching oil cylinder |
-
2013
- 2013-02-28 CN CN 201320092838 patent/CN203081896U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103174699A (en) * | 2013-02-28 | 2013-06-26 | 韶关市伟光液压油缸有限公司 | Servo hydraulic cylinder |
| CN103174699B (en) * | 2013-02-28 | 2015-11-18 | 韶关市伟光液压油缸有限公司 | A kind of servo hydraulic oil cylinder |
| CN104454765A (en) * | 2014-12-31 | 2015-03-25 | 太原科技大学 | Designing method of constant-pressure oil supply type load-deflection resistance horizontal type servo oil cylinder |
| CN104454765B (en) * | 2014-12-31 | 2016-04-06 | 太原科技大学 | A kind of level pressure oil feeding type anti-bias load horizontal servo oil cylinder design method |
| CN104895866A (en) * | 2015-06-18 | 2015-09-09 | 合肥合锻机床股份有限公司 | Equal-speed equal-stroke high frequency response double-acting cylinder |
| CN111608985A (en) * | 2020-06-02 | 2020-09-01 | 香河凯华齿轮有限公司 | Gear punching oil cylinder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130724 Effective date of abandoning: 20151118 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |