CN2900888Y - New hydraulic cylinder - Google Patents
New hydraulic cylinder Download PDFInfo
- Publication number
- CN2900888Y CN2900888Y CN 200620070983 CN200620070983U CN2900888Y CN 2900888 Y CN2900888 Y CN 2900888Y CN 200620070983 CN200620070983 CN 200620070983 CN 200620070983 U CN200620070983 U CN 200620070983U CN 2900888 Y CN2900888 Y CN 2900888Y
- Authority
- CN
- China
- Prior art keywords
- ring
- piston
- hydraulic cylinder
- novel hydraulic
- cylinder according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model, a hydraulic cylinder relates to a delivery rate, in particular to a delivery rate which can realize delivery rate change, comprising a cylinder body, a piston, a cylinder rod, a front and a back end cap. A bench circle is provided on the cylinder rod, a ring is clearance fitted with the bench circle wherein the diameter is greater than the outer diameter of the ring. The ring is provided between the bench and the bottom face of the piston, the front end cap provides the hole which is coaxially and clearance fitted with the ring, a bench hole is provided in the back end cap aperture, the cylinder rod stretch out of the piston top face and stretch out another ring which is clearance fitted. The ring excircle is clearance fitted with the bench hole. The utility model provides two rings which can separately realize the hydraulic fluid flow control with employing the front and back end cap on the cylinder rod. The rings can control the piston operating speed by reducing the flow section of hydraulic fluid. The utility model has the advantages of simple structure, high reliability and low cost.
Description
Technical field
The utility model relates to a kind of oil hydraulic cylinder, relates in particular to a kind of oil hydraulic cylinder that can realize that feed speed changes.
Background technique
Oil hydraulic cylinder is when commutation, and feed speed to zero, because effect of inertia can produce the impact to end cap, when such impact appears in the major diameter oil hydraulic cylinder, because inertia is bigger, causes damage to related components by the certain numerical value bust easily.At present, some large-sized oil hydraulic cylinders are established a damping device at stroke near the commutation position place, adopt hydraulic valve to realize buffering mostly.The sort buffer device depends primarily on the degree of reliability of valve, and the valve that reliability is high costs an arm and a leg, and cheap valve can be because the relatively poor buffering usefulness that loses of reliability.
Summary of the invention
For overcoming above defective, the utility model provides a kind of buffering can realize stroke near commutation position time the, the novel hydraulic cylinder that reliability height and cost are low.
The technical solution of the utility model is to realize like this, it is made up of cylinder body, piston, piston rod, front and rear cover, on piston rod, be provided with step circle, one ring and this step circle Spielpassung, the external diameter of ring is greater than this step diameter of a circle, this ring is located between this step and the piston bottom surface, front cover is provided with the hole of and Spielpassung coaxial with this ring, the place, aperture of rear end cover establishes a step hole, piston rod stretches out piston-top surface, external part establish one with it Spielpassung another the ring, the cylindrical of this ring and this step hole Spielpassung.
The height of described ring is slightly less than the spacing of step and piston bottom surface.
One end outer surface of the corresponding front cover of described ring is established taper.
Described taper tapering is 1～6 degree.
Offer groove on the end face of the corresponding piston of described ring bottom surface perpendicular to axis.
The cylindrical of another ring offers the groove that parallels to the axis.
Another end that encircles corresponding piston is provided with the step circle of diameter less than this ring external diameter
On front cover, also be provided with one-way valve.
The utility model is provided with two rings on piston rod, corresponding these two rings, on front cover and rear end cover, be provided with the step hole that cooperates with it respectively, one of them ring can axially done micro-moving, another ring floats and is connected the termination of piston rod, more than two rings can be respectively realize control to the hydraulic fluid flow, coming the motion speed of control piston by reducing the flow section of hydraulic fluid with front cover and rear end cover.The utility model is simple in structure, the reliability height, and cost is low.
Description of drawings
Fig. 1 is a structural representation of the present utility model
1 is piston rod among the figure, the 2nd, and front cover, the 3rd, cylinder body, the 4th, ring, the 5th, piston, the 6th, ring, the 7th, rear end cover.
Fig. 2 is the structural representation of ring 4 among Fig. 1
Fig. 3 is the left view of Fig. 2
Fig. 4 is the structural representation of ring 6 among Fig. 1
Fig. 5 is the left view of Fig. 4
Embodiment
The utility model connects front and rear cover 2,7 respectively in cylinder body 3 front and back, establish piston rod 1 in the front and rear cover 2,7, on piston rod 1, be provided with step circle, one ring 4 and this step circle Spielpassung, the external diameter of ring 4 is greater than this step diameter of a circle, this ring 4 is located between this step and piston 5 bottom surfaces, front cover 2 is provided with the hole of encircling 4 coaxial and Spielpassung with this, the place, aperture of rear end cover 7 establishes a step hole, piston rod 1 stretches out piston 5 end faces, external part is established another ring 6 of Spielpassung with it, this ring cylindrical and this step hole Spielpassung of 6.
The height of ring 4 is slightly less than the spacing of step and piston 5 bottom surfaces, to guarantee ring 4 axial displacement clearance of trace can be arranged.Encircle an end outer surface of 4 corresponding front covers 2 and establish taper, the taper tapering is 1～6 degree, because ring 4 is a Spielpassung with piston rod 1, have slight clearance radially, cause the end face of ring 4 to contact with the step hole end face, ring 4 can not stretch into step hole, does not have the effect of buffering, if behind the above tapering, ring 4 can enter this hole by this tapering guiding; In addition, the effect of this tapering also is embodied in, and when ring 4 is in the step hole of front cover 2, in front cover 2 oil pockets during oil-feed, can increases fluid to encircling 4 thrust, thereby can start apace.Encircle the groove that offers on the end face of 4 corresponding pistons, 5 bottom surfaces perpendicular to axis.
The cylindrical of another ring 6 offers the groove that parallels to the axis.Another end that encircles 6 corresponding pistons 5 is provided with diameter and encircles the step circle of 6 external diameters less than this.
Also be provided with one-way valve on front cover 2, this one-way valve plays auxiliary buffer function.
Claims (8)
1, a kind of novel hydraulic cylinder, form by cylinder body, piston, piston rod, front and rear cover, it is characterized in that, on piston rod, be provided with step circle, one ring and this step circle Spielpassung, the external diameter of ring is greater than this step diameter of a circle, this ring is located between this step and the piston bottom surface, front cover is provided with the hole of and Spielpassung coaxial with this ring, the place, aperture of rear end cover establishes a step hole, piston rod stretches out piston-top surface, external part establish one with it Spielpassung another the ring, the cylindrical of this ring and this step hole Spielpassung.
2, a kind of novel hydraulic cylinder according to claim 1 is characterized in that, the height of described ring is slightly less than the spacing of step and piston bottom surface.
3, a kind of novel hydraulic cylinder according to claim 1 is characterized in that, an end outer surface of the corresponding front cover of described ring is established taper.
4, a kind of novel hydraulic cylinder according to claim 3 is characterized in that, described taper tapering is 1～6 degree.
5, a kind of novel hydraulic cylinder according to claim 1 is characterized in that, offers the groove perpendicular to axis on the end face of the corresponding piston of described ring bottom surface.
6, a kind of novel hydraulic cylinder according to claim 1 is characterized in that, the cylindrical of another ring offers the groove that parallels to the axis.
7, a kind of novel hydraulic cylinder according to claim 1 is characterized in that, another end that encircles corresponding piston is provided with the step circle of diameter less than this ring external diameter.
8, a kind of novel hydraulic cylinder according to claim 1 is characterized in that, also is provided with one-way valve at front cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620070983 CN2900888Y (en) | 2006-04-01 | 2006-04-01 | New hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620070983 CN2900888Y (en) | 2006-04-01 | 2006-04-01 | New hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2900888Y true CN2900888Y (en) | 2007-05-16 |
Family
ID=38085051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620070983 Expired - Fee Related CN2900888Y (en) | 2006-04-01 | 2006-04-01 | New hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2900888Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012010031A1 (en) * | 2010-07-23 | 2012-01-26 | 湖南三一智能控制设备有限公司 | Hydraulic oil cylinder and related equipments, hydraulic buffer system, excavator and concrete pump truck |
-
2006
- 2006-04-01 CN CN 200620070983 patent/CN2900888Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012010031A1 (en) * | 2010-07-23 | 2012-01-26 | 湖南三一智能控制设备有限公司 | Hydraulic oil cylinder and related equipments, hydraulic buffer system, excavator and concrete pump truck |
| US9394927B2 (en) | 2010-07-23 | 2016-07-19 | Hunan Sany Intelligent Control Equipment Co., Ltd. | Hydraulic oil cylinder and related equipments, hydraulic buffer system, excavator and concrete pump truck |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |