CN208845471U - A kind of synchronous hydraulic oil cylinder - Google Patents
A kind of synchronous hydraulic oil cylinder Download PDFInfo
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- CN208845471U CN208845471U CN201821535743.9U CN201821535743U CN208845471U CN 208845471 U CN208845471 U CN 208845471U CN 201821535743 U CN201821535743 U CN 201821535743U CN 208845471 U CN208845471 U CN 208845471U
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- hydraulic oil
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Abstract
The utility model relates to hydraulic cylinder technical fields, disclose a kind of synchronous hydraulic oil cylinder, including outer cylinder body, outer cylinder body bottom is provided with the first hydraulic fluid port, first piston is fixedly connected in first cylinder barrel, the first cavity is formed between first cylinder barrel and outer cylinder body, second piston is slidably connected in first cylinder barrel, the first driving chamber is formed between first piston and second piston, it is provided with intercommunicating pore on first cylinder barrel, fuel feed hole is provided on first piston, check valve is installed in fuel feed hole, the second hydraulic fluid port is provided in second piston, the second hydraulic fluid port is connected to the first driving chamber；It is hit to solve to exist in the prior art ectonexine piston component, entire multistage hydraulic cylinder generates vibration, so that the problem that multistage hydraulic cylinder stability is still poor, this programme passes through the setting of check valve, the first cavity and the first driving chamber, so that the pressure of hydraulic oil reduces step by step, the first cylinder barrel and second piston movement velocity can be made to be consistent substantially, ensure that the stability of synchronous hydraulic oil cylinder.
Description
Technical field
The utility model relates to hydraulic cylinder technical field, in particular to a kind of synchronous hydraulic oil cylinder.
Background technique
Multi-stage expansion hydraulic cylinder is set with by multiple pistons or plunger, is directly to connect between level-one rod cavity and second level rod cavity
Logical, when hydraulic cylinder stretches out, drive corresponding piston to drive corresponding work compared with small piston rod to section from the larger piston rod in section
Plug successively stretches out；In the case where input flow rate is constant, hydraulic cylinder stretches out speed and hydraulic in-cylinder pressure all changes step by step, value
It is inversely proportional with piston area, after first stage piston bar moves to the limit, hydraulic oil pushes second piston rod movement, due to speed
Increase suddenly with pressure, second piston rod moment by faster to move in the speed of first stage piston bar, second piston rod will occur
The phenomenon that moment goes out from level-one rod cavity will cause entire multi-stage expansion hydraulic cylinder the problem of significant shock occur, stability compared with
Difference.
In order to solve problem above, the utility model patent that Chinese Patent Application No. is 201620580555.2, discloses one
Kind multistage hydraulic cylinder successively slides nested cylinder body including at least two from inside to outside, slides and set in the cylinder body of innermost layer
There is a piston component, each cylinder body includes bottom cover and cylinder barrel, between the cylinder barrel of adjacent cylinder body and the cylinder of the cylinder body of innermost layer
Rod chamber is respectively formed between cylinder and piston component, between the bottom cover of adjacent cylinder body and the bottom cover of the cylinder body of innermost layer and work
It is respectively formed rodless cavity between plug assembly, is equipped with the first oil pump, first passage and second channel, the first oil pump in multistage hydraulic cylinder
It is connected to by first passage with each rod chamber, the first oil pump is connected to by second channel with each rodless cavity.In multistage hydraulic
The first oil pump and oil transportation channel is arranged in the inside of cylinder, by each rod chamber of multistage hydraulic cylinder and each rodless cavity respectively with the first oil pump
Connection inputs oil liquid to rod chamber and rodless cavity respectively by rotating and reverse for control oil pump, to drive multistage hydraulic cylinder
Running.
Above scheme, to each rod cavity together fuel feeding, is reduced internal layer piston component and hits outer layer piston component by oil pump
Dynamics solve the problems of the prior art, but above scheme is also deposited to improve the flexible stability of multistage hydraulic cylinder
In following problems, when oil pump rotates forward, oil pump is to each rod cavity together fuel feeding, because oil pressure is equal in each rod cavity, so that internal layer
Piston component is faster than the piston component movement velocity of outer layer, when internal layer piston component moves to the limit, it will hits outer layer
Piston component, so that entire multistage hydraulic cylinder generates vibration, the stability of multistage hydraulic cylinder is still poor.
Utility model content
The utility model, which is intended to provide one kind, can be such that each piston component is promoted together, and may make that promote speed protects substantially
It holds unanimously, avoids the occurrence of internal layer piston component and hit outer layer assembly, guarantee the synchronous hydraulic oil cylinder of multistage hydraulic cylinder stability.
One of this programme synchronous hydraulic oil cylinder, including outer cylinder body, outer cylinder body bottom are provided with the first hydraulic fluid port, in outer cylinder body
The first cylinder barrel is slidably connected, first piston is fixedly connected in the first cylinder barrel, is formed between the first cylinder barrel and outer cylinder body
One cavity slidably connects second piston in the first cylinder barrel, the first driving chamber is formed between first piston and second piston, and
Intercommunicating pore is provided on one cylinder barrel, intercommunicating pore is used to be connected to the first cavity and the first driving chamber, is provided with fuel feed hole on first piston, into
Check valve is installed in oilhole, the second hydraulic fluid port is provided in second piston, the second hydraulic fluid port is connected to the first driving chamber.
It the technical principle of this programme and has the beneficial effect that
1, this programme in the first hydraulic fluid port oiling, and can pass through check valve for fuel feed hole, first by the setting of check valve
Driving chamber, intercommunicating pore and the first cavity fill, and when continuing through the first hydraulic fluid port oiling, oil liquid will press first piston and drive first
Cylinder barrel moves upwards, and the first cylinder barrel enters the oil liquid squeezed in the first cavity in the first driving chamber, enters the first driving
Intracavitary oil liquid is on the one hand by reaction check valve, common cross-sectional area after being connected due to the first cylinder barrel with first piston
A1, equal to the cross-sectional area A2 of the first cylinder barrel of the first cavity, the first driving chamber and part, therefore A1 will be greater than the first cavity and
The cross-sectional area A3 of first driving chamber, in the identical situation of active force, the pressure P1 acted on A1, which will be less than, acts on A3
On pressure P2 on the other hand second piston will be pushed to move upwards so that closed check valve so that the first cylinder barrel and the
Two pistons are lifted up together.
2, the oil liquid that this programme enters from the first hydraulic fluid port drives the first cylinder barrel to be moved, and the first cylinder barrel will be to the first cavity
Interior oil liquid does work, and due to the loss of acting, oil liquid, which is greater than from intercommunicating pore the active force of the first cylinder barrel, is flowed into first
To the active force of second piston, the first cylinder barrel and second piston and the contact area of oil liquid are gradually reduced, make driving chamber inner fluid
It firmly also gradually decreases, so as to be consistent the first cylinder barrel and second piston movement velocity substantially, by certifiable first cylinder
Cylinder and second piston move at the limit together, prevent second piston and hit the first cylinder barrel, ensure that synchronous hydraulic oil cylinder
Stability.
Further, the first cavity cross-sectional area is equal with the cross-sectional area of the first driving chamber.It is upward in the first cylinder barrel
When movement, the area that the first cavity reduces will be consistent with the increased area of the first driving chamber, to guarantee the first cylinder barrel and second
Piston movement speed is consistent.
Further, first piston is connected on the first cylinder barrel.It facilitates and first piston is installed in the first cylinder barrel.
Further, it is fixedly connected with locating ring on first piston, card slot is provided on the first cylinder barrel, is connected with card in card slot
Key, locating ring offset with card key.First piston is first placed on to the bottom of the first cylinder barrel, card key is then snapped fit into card slot again
It is interior, then locating ring is fixed on first piston, and push against card key and locating ring and fix, so that first piston is fixed on
The bottom of first cylinder barrel.
Further, bolt is threaded on first piston, locating ring is socketed on bolt.It is bolted positioning
Circle, facilitates the installation and replacement of locating ring.
Further, sealing ring is mounted between the first cylinder barrel and outer cylinder body, between second piston and the first cylinder barrel.Sealing
The setting of ring prevents oil liquid from leaking out between the first cylinder barrel and outer cylinder body, between second piston and the first cylinder barrel.
Further, earrings is fixedly connected at the top of second piston.The setting of earrings is facilitated and is installed with press object.
Detailed description of the invention
Fig. 1 is a kind of sectional view of synchronous hydraulic oil cylinder of the utility model embodiment.
Specific embodiment
It is further described below by specific embodiment:
Appended drawing reference in Figure of description includes: outer cylinder pedestal 1, outer cylinder 2, the first cylinder barrel 3, first piston 4, attached
Add cylinder barrel 5, additional piston 6, second piston cylinder 7, check valve 8, intercommunicating pore 9, card key 10, locating ring 11, bolt 12, the first hydraulic fluid port
13, the second hydraulic fluid port 14, oil-through-hole 15, earrings 16.
Embodiment is as shown in Fig. 1: a kind of synchronous hydraulic oil cylinder, including outer cylinder body, and outer cylinder body includes outer cylinder 2 and outer shell
Cylinder pedestal 1, outer cylinder pedestal 1 are welded on 2 bottom of outer cylinder, and outer cylinder pedestal 1 is provided with the first hydraulic fluid port 13, and sliding connects in outer cylinder body
It is connected to the first cylinder barrel 3, first piston 4 is installed in first cylinder barrel 3, is formed with the first cavity between the first cylinder barrel 3 and outer cylinder body,
Additional cylinder barrel 5 is slidably connected in first cylinder barrel 3, and additional piston 6, the first cylinder barrel 3 and additional cylinder barrel are installed in additional cylinder barrel 5
It is provided with card slot on 5, is connected with card key 10 in card slot, 10 phase of card key has a locating ring 11, on first piston 4 and additional piston 6
It is threaded with bolt 12, locating ring 11 is socketed on bolt 12, is formed with second between additional cylinder barrel 5 and the first cylinder barrel 3
Cavity is formed with additional drives chamber, the cross-sectional area and additional drives of the first cavity between first piston 4 and additional piston 6
The cross-sectional area of chamber is equal, slidably connects second piston in additional cylinder barrel 5, and second piston includes second piston cylinder 7, and second
It is welded with blocking on piston cylinder 7, the first driving chamber, the first cylinder barrel 3 and attaching cylinder are formed between additional piston 6 and second piston
It is provided with intercommunicating pore 9 on cylinder 5, the intercommunicating pore 9 on the first cylinder barrel 3 adds cylinder barrel 5 for being connected to the first cavity and additional drives chamber
On intercommunicating pore 9 for being connected to the second cavity and the first driving chamber, the cross of the cross-sectional area of the second cavity and the first driving chamber
Area of section is equal, and fuel feed hole is provided on first piston 4 and additional piston 6, and check valve 8 is equipped in fuel feed hole, and first is living
The oil inlet direction for filling in 4 internal check valves 8 is from the first hydraulic fluid port to additional drives chamber, and the oil inlet direction of 6 internal check valve 8 of additional piston is
From additional drives chamber to the first driving chamber, it is provided with oil-through-hole 15 in blocking, the second hydraulic fluid port 14, the second hydraulic fluid port are provided on oil-through-hole 15
14 are connected to the first driving chamber, integrally formed with earrings 16 on blocking, between the first cylinder barrel 3 and outer cylinder 2, additional cylinder barrel 5 with
Sealing ring is mounted between first cylinder barrel 3, between second piston cylinder 7 and additional cylinder barrel 5.
It first passes through the first hydraulic fluid port 13 and carries out oiling, so that the first cavity, the second cavity, additional drives chamber, the first driving chamber
It is each filled with oil liquid with all spaces in the equal outer cylinders 2 of second piston cylinder 7, when synchronous hydraulic oil cylinder needs to be lifted out, after
Continuous to carry out oiling by the first hydraulic fluid port 13, oil liquid will push first piston 4 and the first cylinder barrel 3 to move upwards, and the first cylinder barrel 3 will push away
Oil liquid in dynamic first cavity enters that additional drives are intracavitary, on the one hand oil liquid counter will be made by the intercommunicating pore 9 on the first cylinder barrel 3
With the check valve 8 in first piston 4, the check valve 8 in first piston 4 will be closed, on the other hand oil liquid will push additional live
Plug 6 and 5 upward sliding of additional cylinder barrel, since the cross-sectional area of the first cavity is equal with the cross-sectional area of additional drives chamber,
The volume that first cavity reduces will be equal to the increased volume of additional drives chamber, to guarantee that the first cylinder barrel 3 and additional cylinder barrel 5 are upward
The same height of sliding；When additional cylinder barrel 5 is lifted up, the oil liquid that additional cylinder barrel 5 also squeezes in the second cavity enters first
In driving chamber, on the one hand reaction is added the check valve 8 in cylinder barrel 5 by oil liquid, and the check valve 8 in additional cylinder barrel 5 will close,
On the other hand oil liquid will push first piston 4 and 16 upward sliding of earrings, since the cross-sectional area of the second cavity and first drive
The cross-sectional area of dynamic chamber is equal, and the volume that the second cavity reduces will be equal to the increased volume of the first driving chamber, to guarantee attached
Add cylinder barrel 5 and first piston 4 upward sliding at a same speed, so that the first cylinder barrel 3, additional cylinder barrel 5 and first piston 4
It is lifted up at a same speed, after the first cylinder barrel 3 moves to extreme position, the first cylinder barrel 3, additional cylinder barrel 5 and first
Piston 4 also will stop motion together, and can prevent the first cylinder barrel 3, additional cylinder barrel 5 and first piston 4 from mutually hitting, it will to mention
Rise the stability of entire synchronous hydraulic oil cylinder；After first cylinder barrel 3, additional 4 stop motion of cylinder barrel 5 and first piston, have from first
The hydraulic oil of mouth injection will be flowed out by two check valves 8 and oil-through-hole 15 from the second hydraulic fluid port 14, and oiling is stopped.
When needing to reset synchronous hydraulic oil cylinder, to the second hydraulic fluid port 14 carry out oiling, oil liquid will by fuel feed hole into
Enter into second piston cylinder 7, and the oil liquid in the first driving chamber is pressed into the second appearance by the intercommunicating pore 9 added on cylinder barrel 5
Intracavitary, second piston cylinder 7 will move downward, and oil liquid will also push additional 5 slide downward of cylinder barrel, and it is additional to add the drive of cylinder barrel 5
Piston 6 push additional drives chamber oil liquid enter in the first cavity, oil liquid will push the first cylinder barrel 3 drive first piston 4 to
Lower slider, the first cylinder barrel 3 and first piston 4 will push the oil liquid between outer cylinder pedestal 1 and first piston 4 from the first hydraulic fluid port 13
Outflow after resetting completely, stops oiling.
Above-described is only the embodiments of the present invention, and the common sense such as well known specific structure and characteristic are herein in scheme
It does not describe excessively.It should be pointed out that for those skilled in the art, in the premise for not departing from the utility model structure
Under, several modifications and improvements can also be made, these also should be considered as the protection scope of the utility model, these all will not influence
The effect and patent practicability that the utility model is implemented.This application claims protection scope should be with the content of its claim
Subject to, the records such as specific embodiment in specification can be used for explaining the content of claim.
Claims (7)
1. a kind of synchronous hydraulic oil cylinder, including outer cylinder body, outer cylinder body bottom is provided with the first hydraulic fluid port, and is slidably connected in outer cylinder body
One cylinder barrel is fixedly connected with first piston in the first cylinder barrel, the first cavity, the first cylinder is formed between the first cylinder barrel and outer cylinder body
Second piston is slidably connected in cylinder, the first driving chamber is formed between first piston and second piston, which is characterized in that first
Intercommunicating pore is provided on cylinder barrel, intercommunicating pore is provided with fuel feed hole, oil inlet on first piston for being connected to the first cavity and the first driving chamber
It is equipped in hole from the first hydraulic fluid port to the check valve of the first driving chamber oil inlet, is provided with the second hydraulic fluid port, the second hydraulic fluid port in second piston
It is connected to the first driving chamber.
2. synchronous hydraulic oil cylinder according to claim 1, it is characterised in that: the cross-sectional area of first cavity and
The cross-sectional area of one driving chamber is equal.
3. synchronous hydraulic oil cylinder according to claim 1, it is characterised in that: the first piston is connected to the first cylinder barrel
On.
4. synchronous hydraulic oil cylinder according to claim 3, it is characterised in that: be fixedly connected with positioning on the first piston
It encloses, is provided with card slot on the first cylinder barrel, card key is connected in card slot, locating ring offsets with card key.
5. synchronous hydraulic oil cylinder according to claim 4, it is characterised in that: be threaded with spiral shell on the first piston
Bolt, locating ring are socketed on bolt.
6. synchronous hydraulic oil cylinder according to claim 1, it is characterised in that: between first cylinder barrel and outer cylinder body,
Sealing ring is mounted between two pistons and the first cylinder barrel.
7. synchronous hydraulic oil cylinder according to claim 1, it is characterised in that: be fixedly connected with ear at the top of the second piston
Ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821535743.9U CN208845471U (en) | 2018-09-18 | 2018-09-18 | A kind of synchronous hydraulic oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821535743.9U CN208845471U (en) | 2018-09-18 | 2018-09-18 | A kind of synchronous hydraulic oil cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208845471U true CN208845471U (en) | 2019-05-10 |
Family
ID=66373428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821535743.9U Expired - Fee Related CN208845471U (en) | 2018-09-18 | 2018-09-18 | A kind of synchronous hydraulic oil cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208845471U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108953283A (en) * | 2018-09-18 | 2018-12-07 | 重庆市巴山液压附件厂有限公司 | A kind of synchronous hydraulic oil cylinder |
| CN110451422A (en) * | 2019-08-14 | 2019-11-15 | 北京特种机械研究所 | Heavily loaded lifting method based on multistage composite telescopic hydraulic cylinder |
-
2018
- 2018-09-18 CN CN201821535743.9U patent/CN208845471U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108953283A (en) * | 2018-09-18 | 2018-12-07 | 重庆市巴山液压附件厂有限公司 | A kind of synchronous hydraulic oil cylinder |
| CN110451422A (en) * | 2019-08-14 | 2019-11-15 | 北京特种机械研究所 | Heavily loaded lifting method based on multistage composite telescopic hydraulic cylinder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190510 Termination date: 20210918 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |