CN201843852U - Hydrocylinder with buffer function - Google Patents
Hydrocylinder with buffer function Download PDFInfo
- Publication number
- CN201843852U CN201843852U CN2010205697461U CN201020569746U CN201843852U CN 201843852 U CN201843852 U CN 201843852U CN 2010205697461 U CN2010205697461 U CN 2010205697461U CN 201020569746 U CN201020569746 U CN 201020569746U CN 201843852 U CN201843852 U CN 201843852U
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- CN
- China
- Prior art keywords
- cushion collar
- cylinder head
- piston
- piston rod
- wall
- Prior art date
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- Expired - Fee Related
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Abstract
The utility model discloses a hydrocylinder with buffer function, which comprises a cylinder barrel and a cylinder head positioned at one end of the cylinder barrel; the cylinder head is provided with a cylinder head hole; a piston rod sticks into the cylinder barrel through the cylinder head hole; the part of the piston rod sticking into the cylinder barrel is provided with a cushion collar mounting section and a piston mounting section which have sequentially reducing external diameters; the piston mounting section is sleeved with a piston; the cushion collar mounting section is sleeved with a cushion collar; the outer wall of the cushion collar is in clearance fit with the inner wall of the cylinder head; the length of the cushion collar is smaller than that of the cushion collar mounting section in the axial direction of the piston rod, and the inner wall of the cushion collar is in clearance fit with the outer wall of the cushion collar mounting section. The utility model has the benefits that the length and matching relations between the existing cushion collar and the cushion collar mounting section are changed, the cushion collar can float under the action of hydraulic oil; when the coaxiality of the piston rod and the cylinder head hole deteriorates, appropriate translocation can prevent the hydrocylinder from being extruded and damaged, so that the service life is prolonged, and the buffering effect is guaranteed.
Description
Technical field
The utility model relates to the hydraulic machinery technical field, relates in particular to a kind of hydraulic jack.
Background technique
Hydraulic jack is the engineering mechanical components of using always, is made of cylinder barrel and the piston rod and the piston that are positioned at cylinder barrel, and the end that piston rod stretches into cylinder barrel inside is equipped with piston, and when hydraulic oil promoted piston, it is reciprocal that piston can drive piston rod.
The end that cylinder barrel inserts piston rod has cylinder head, and it is the cylinder head hole that cylinder head has through hole, is used to pass, the support piston bar, and also the limit position to piston rod movement has played the qualification effect.The sidewall of cylinder head has the hydraulic fluid port that is communicated with the cylinder head hole, is used for injecting and discharging hydraulic oil.
In the prior art, the end that piston rod is installed piston is the multidiameter shaft structure, be that the piston rod outer wall has ring-shaped step, the piston rod external diameter dwindles successively, wherein piston rod close on piston and the position between piston and cylinder head hole is provided with installation step, the external diameter at this installation step position less than piston rod directly and the external diameter of cylinder head hole mating part, and greater than the external diameter of the installation piston region of piston rod.
Outer wall around installation step is with cushion collar, make progress at piston rod, the length of cushion collar is greater than the length of installation step, because being installed, an end of piston back piston can be adjacent to installation step, and piston rod directly and the external diameter of cylinder head hole mating part greater than the external diameter of installation step, cushion collar will be fixedly clamped cushion collar outer wall and cylinder head hole inwall Spielpassung like this.
When cushion collar and piston when cylinder head moves, cushion collar enters in the cylinder head hole, by cylinder head, the hydraulic oil in the space that cylinder barrel and piston surround can only from cushion collar with and the gap in cylinder head hole discharge, thereby the hydraulic fluid flow rate reduction, played the effect of damper piston bar.
But when piston rod and cylinder head hole coaxality variation, can cause unbalance stress between cushion collar and the cylinder head hole, even the cushion collar part is impaired, influences cushioning effect in the prior art.
The model utility content
The utility model provides a kind of good buffer effect, the hydraulic jack of the band buffer function of long service life.
A kind of hydraulic jack with buffer function, comprise cylinder barrel, be positioned at the cylinder head of cylinder barrel one end, described cylinder head has the cylinder head hole, piston rod stretches in the cylinder barrel by the cylinder head hole, in stretching into cylinder barrel, piston rod is partly with cushion collar construction section and the piston construction section that external diameter dwindles successively, wherein said piston construction section is set with piston, described cushion collar construction section is set with cushion collar, when cushion collar moves in the cylinder head hole, the outer wall of cushion collar and cylinder head hole inwall Spielpassung, piston rod axially on, the length of described cushion collar is less than the length of cushion collar construction section, the outer wall Spielpassung of cushion collar inwall and cushion collar construction section.
The sidewall of described cylinder head has the hydraulic fluid port that is communicated with the cylinder head hole, is used for injecting in cylinder barrel and discharging hydraulic oil.
The hydraulic fluid port that is positioned in described cylinder head hole is provided with seal ring away from the inwall of cylinder barrel one side, and sealing circle and piston rod outer wall are sealed and matched.
The outer wall of described piston is with seal ring, and the sealing circle cooperates with the inner wall sealing of cylinder barrel.
The beneficial effects of the utility model are length relation, the matching relationships that changed existing cushion collar and cushion collar construction section, cushion collar can be floated under the effect of hydraulic oil, when piston rod and cylinder head hole coaxality variation, suitable change position is avoided being extruded impaired, prolong working life, guaranteed cushioning effect.
Description of drawings
Fig. 1 is the generalized section of closing on the cylinder head position of the hydraulic jack of the utility model band buffer function.
Embodiment
Referring to accompanying drawing, a kind of hydraulic jack with buffer function of the utility model comprises cylinder barrel 4, is positioned at the cylinder head 2 of cylinder barrel 4 one ends, cylinder head has the cylinder head hole, piston rod 1 stretches in the cylinder barrel 4 by the cylinder head hole, in stretching into cylinder barrel 4, piston rod 1 is partly with cushion collar construction section and the piston construction section that external diameter dwindles successively, wherein the piston construction section is set with piston 5, and the cushion collar construction section is set with cushion collar 3.
The sidewall of cylinder head 2 has the hydraulic fluid port that is communicated with the cylinder head hole, is used for injecting in cylinder barrel 4 and discharging hydraulic oil.The hydraulic fluid port that is positioned in cylinder head hole is provided with seal ring away from the inwall of cylinder barrel 4 one sides, and sealing circle and piston rod 1 outer wall are sealed and matched.The outer wall of piston 5 is with seal ring, and the sealing circle cooperates with the inner wall sealing of cylinder barrel 4.
When the utility model hydraulic jack uses, piston rod 1 and piston 5, cushion collar 3 move to cushion collar 3 left when entering the cylinder head hole among the figure, by cylinder head 2, hydraulic oil in the space that cylinder barrel 4 and piston 5 surround can only be discharged from the gap in the outer wall of cushion collar 3 and cylinder head hole, because reducing of hydraulic fluid flow rate cushioned the motion of piston rod 1.When piston rod 1 and cylinder head hole coaxality variation, limit cushion collar 3 because piston 5 does not push in the axial direction, and cushion collar 3 all is Spielpassung with cylinder head hole and piston rod 1, makes the cushion collar 3 can the radial floating automatic capturings, avoid cushion collar 3 cylindricals and cylinder head hole to squeeze and hinder, shorten the oil cylinder life-span.
Claims (4)
1. hydraulic jack with buffer function, comprise cylinder barrel, be positioned at the cylinder head of cylinder barrel one end, described cylinder head has the cylinder head hole, piston rod stretches in the cylinder barrel by the cylinder head hole, in stretching into cylinder barrel, piston rod is partly with cushion collar construction section and the piston construction section that external diameter dwindles successively, wherein said piston construction section is set with piston, described cushion collar construction section is set with cushion collar, when cushion collar moves in the cylinder head hole, the outer wall of cushion collar and cylinder head hole inwall Spielpassung is characterized in that, piston rod axially on, the length of described cushion collar is less than the length of cushion collar construction section, the outer wall Spielpassung of cushion collar inwall and cushion collar construction section.
2. the hydraulic jack of band buffer function as claimed in claim 1 is characterized in that, the sidewall of described cylinder head has the hydraulic fluid port that is communicated with the cylinder head hole.
3. the hydraulic jack of band buffer function as claimed in claim 2 is characterized in that, the hydraulic fluid port that is positioned in described cylinder head hole is provided with seal ring away from the inwall of cylinder barrel one side, and sealing circle and piston rod outer wall are sealed and matched.
4. the hydraulic jack of band buffer function as claimed in claim 1 is characterized in that, the outer wall of described piston is with seal ring, and the sealing circle cooperates with the inner wall sealing of cylinder barrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205697461U CN201843852U (en) | 2010-10-20 | 2010-10-20 | Hydrocylinder with buffer function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205697461U CN201843852U (en) | 2010-10-20 | 2010-10-20 | Hydrocylinder with buffer function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201843852U true CN201843852U (en) | 2011-05-25 |
Family
ID=44038744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205697461U Expired - Fee Related CN201843852U (en) | 2010-10-20 | 2010-10-20 | Hydrocylinder with buffer function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201843852U (en) |
-
2010
- 2010-10-20 CN CN2010205697461U patent/CN201843852U/en not_active Expired - Fee Related
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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: 20110525 Termination date: 20151020 |
|
| EXPY | Termination of patent right or utility model |