CN207583736U - A kind of hydraulic cylinder - Google Patents
A kind of hydraulic cylinder Download PDFInfo
- Publication number
- CN207583736U CN207583736U CN201721753352.XU CN201721753352U CN207583736U CN 207583736 U CN207583736 U CN 207583736U CN 201721753352 U CN201721753352 U CN 201721753352U CN 207583736 U CN207583736 U CN 207583736U
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- piston
- cylinder body
- hydraulic cylinder
- hydraulic
- elastic component
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Abstract
The fluid apertures included in piston rod, cylinder body, first piston and first piston that the utility model proposes, setting elastic component in hydraulic cylinder, one end of the affixed elastic component in bottom, the affixed second piston of the other end of elastic component in cylinder body；Hydraulic cylinder inner top is equipped with first piston, and piston rod is affixed with first piston, is hydraulic cavities between first piston and second piston, is atmospheric pressure cavity between second piston and cylinder body bottom, second piston side surface is equipped with sealing ring.Even if moving component is when carrying out start by a small margin, it draws outside piston rod apart from too short and the oil of hydraulic cavities is caused to be difficult to pass through fluid apertures, so that motion cushioning effect unobvious, but due to being provided with atmospheric pressure cavity and elastic component, preliminary buffering can also carry out motion for the above situation so that the movement that this hydraulic cylinder carries out more by a small margin component also can be well into row buffering.
Description
Technical field
The utility model is related to buffer equipment, especially a kind of hydraulic cylinder.
Background technology
The structure of existing hydraulic cylinder as shown in Figure 1, one end of piston rod 101 is socketed with cylinder body 100, stretch by piston rod
Enter one end in hydraulic stem and be connected with piston 103, the piston rod socket y-type seal ring 102 above piston, piston is equipped with cyclic annular recessed
Slot, the interior suit O-ring seal 104 of groove.The connection of piston rod 101 needs to move it moving component into row buffering, the movement
Piston is pushed during component start, piston is moved towards hydraulic cavities 105.Full of damping oil in hydraulic cavities 105, when piston is pushed away towards hydraulic cavities
Into when, damping oil is squeezed by the thrust of piston, on the one hand, piston is supported by the damping oil in hydraulic cavities, piston slow down, so as to
So that piston rod and moving component slow down, play the role of buffering；On the other hand, damping oil is squeezed by the thrust of piston,
Damping oil flows out hydraulic cavities by the fluid apertures on piston.So for theoretically, the damping oil in hydraulic cavities is by piston to it
Active force it is bigger, the speed that damping oil flows out hydraulic cavities by fluid apertures on piston is faster.
But moving component pushes piston during execution, if when thrust is less than certain limit, can lead
It causes damping oil very few or even can not be flowed out by fluid apertures by the amount that fluid apertures on piston flows out, causes the buffering to moving component
It is ineffective or even buffering effect can not be generated, easily so that moving component is directly hit with pneumatic cylinder because cannot buffer due to,
So that both have the danger of damage.
Invention content
The utility model be intended to provide it is a kind of reaction it is sensitiveer, to component protection performance more preferably hydraulic cylinder.
A kind of hydraulic cylinder, including cylinder body, first piston and one end in cylinder body connect first piston and the other end stretches out
Piston rod, the aperture flowed back and forth in both sides for liquid is provided on first piston, it is characterised in that：It is also set up in cylinder body
There is second piston, second piston is located in first piston and cylinder body between bottom, is sealed around second piston with inboard wall of cylinder block, by it
Part sealing between first piston separates to form hydraulic cavities, and the part sealing between bottom in cylinder body separates to form closing
Atmospheric pressure cavity, elastic component is installed between bottom in second piston and cylinder body.
The moving component into row buffering is needed to be connected on the piston rod of hydraulic cylinder, by piston rod toward hydraulic cylinder during start
Inside push-in.Oil in hydraulic cavities is flowed out piston by piston rod thrust by fluid apertures；Meanwhile gas, the elastic component of atmospheric pressure cavity
By thrust, a reaction force also is provided to piston rod, to the action of piston rod into row buffering.
For moving component when carrying out start by a small margin, piston rod advance distance is too short and the oil of hydraulic cavities is caused to be difficult to pass through
Fluid apertures so as to motion cushioning effect unobvious, but due to being provided with atmospheric pressure cavity and elastic component, even for above-mentioned feelings
Condition also can carry out motion preliminary buffering by the gas in atmospheric pressure cavity and elastic component so that hydraulic cylinder to component compared with
Movement by a small margin also can be well into row buffering.
Description of the drawings
Fig. 1 is the diagrammatic cross-section of existing hydraulic cylinder；
Fig. 2 is the diagrammatic cross-section of the utility model.
Specific embodiment
As shown in Fig. 2, one end of piston rod 201 is socketed with cylinder body 200, piston rod stretches into one end in hydraulic cylinder
It is connected with first piston 203, the piston rod socket y-type seal ring 202 above first piston, piston is equipped with annular recess, groove
Interior suit O-ring seal 204.The interior bottom of hydraulic cylinder 200 is connected with elastic component 207, the affixed second piston of the other end of elastic component
206, second piston is equipped with annular recess, and O-ring seal 204 is set in groove.Between first piston 203 and second piston 206
For hydraulic cavities 205, hydraulic cavities are interior to be full of damping oil, and the fluid apertures along piston rod direction is provided in first piston；Second piston is extremely
Hydraulic cylinder bottom is atmospheric pressure cavity, is full of compressed air in atmospheric pressure cavity.
Substantially the course of work is as follows, and piston rod connection needs the moving component for making to buffer, when piston rod is by moving component
During the thrust of transmission, since atmospheric density is much smaller than the density of hydraulic cavities internal damping oil, thus 206 meeting of second piston in atmospheric pressure cavity
Preferential start, second piston towards the air in the movement of hydraulic cylinder bottom and compression elastic piece 207 and atmospheric pressure cavity, elastic component,
During compressed air is further compressed, atmospheric pressure cavity is with elastic component jointly to one reversed active force of piston rod, and pass
It is delivered to moving component to be allowed to slow down, plays the role of tentatively buffering moving component.If moving component is transmitted to piston rod
Thrust is enough, and first piston can start start, first piston compression hydraulic intracavitary damping oil, damping oil after second piston start
Flow to fluid apertures, damping oil similarly one reversed active force of piston rod, and be transmitted to moving component and be allowed to subtract in hydraulic cavities
Speed plays the further cushioning effect to moving component.In the case of even if thrust is insufficient, i.e., piston rod pulls out very little one
After the distance of end when being pressed into again again, hydraulic cavities are extremely limited to its cushioning effect, but due to there are second piston, elastic component,
Atmospheric pressure cavity mutual cooperation tentatively buffers piston rod, and the movement that even moving component carries out by a small margin can also be delayed
Punching so that hydraulic cylinder is more sensitive to pressure sensitive, to moving component protective value more preferably.
Further, the upper surface of second piston is provided with recessed portion, prevents first piston from continually hitting the second work
Plug is easily damaged so as to cause second piston.
It is noted that the damping oil described in the utility model, merely with its highdensity physical characteristic, the air is also only
Using its physical characteristic, in fact, other liquid of damping oil available physical property and similar density replace, compressed air also may be used
To be replaced with other of physical property and similar density gas.
Claims (5)
1. a kind of hydraulic cylinder, including cylinder body, first piston and one end connection first piston in cylinder body and what the other end stretched out
Piston rod is provided with the aperture flowed back and forth in both sides for liquid on first piston, it is characterised in that：It is additionally provided in cylinder body
Second piston, second piston are located in first piston and cylinder body between bottom, around second piston with inboard wall of cylinder block seal, by its with
Part sealing between first piston separates to form hydraulic cavities, and the part sealing between bottom in cylinder body separates to form closing
Atmospheric pressure cavity is equipped with elastic component in second piston and cylinder body between bottom.
2. a kind of hydraulic cylinder according to claim 1, it is characterised in that：The side surface of second piston is equipped with annular recess,
O-ring seal is cased on groove.
3. a kind of hydraulic cylinder according to claim 1, it is characterised in that：Damping oil is full of in hydraulic cavities.
4. a kind of hydraulic cylinder according to claim 1, it is characterised in that：Compressed air is full of in atmospheric pressure cavity.
5. a kind of hydraulic cylinder according to claim 1, it is characterised in that：The upper surface of second piston is equipped with recessed portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721753352.XU CN207583736U (en) | 2017-12-15 | 2017-12-15 | A kind of hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721753352.XU CN207583736U (en) | 2017-12-15 | 2017-12-15 | A kind of hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207583736U true CN207583736U (en) | 2018-07-06 |
Family
ID=62738408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721753352.XU Active CN207583736U (en) | 2017-12-15 | 2017-12-15 | A kind of hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207583736U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112555228A (en) * | 2020-12-09 | 2021-03-26 | 山东科技大学 | Impact-resistant balance oil cylinder with pressure relief and buffer protection |
-
2017
- 2017-12-15 CN CN201721753352.XU patent/CN207583736U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112555228A (en) * | 2020-12-09 | 2021-03-26 | 山东科技大学 | Impact-resistant balance oil cylinder with pressure relief and buffer protection |
| CN112555228B (en) * | 2020-12-09 | 2021-11-05 | 山东科技大学 | Impact-resistant balance oil cylinder with pressure relief and buffer protection |
| WO2022016949A1 (en) * | 2020-12-09 | 2022-01-27 | 山东科技大学 | Impact-resistant balance oil cylinder having functions of pressure relief and buffer protection |
| JP7390675B2 (en) | 2020-12-09 | 2023-12-04 | 山東科技大学 | Impact-resistant balance cylinder with pressure release and buffer protection functions |
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