CN203098463U - Hydraulic cylinder - Google Patents
Hydraulic cylinder Download PDFInfo
- Publication number
- CN203098463U CN203098463U CN 201320064438 CN201320064438U CN203098463U CN 203098463 U CN203098463 U CN 203098463U CN 201320064438 CN201320064438 CN 201320064438 CN 201320064438 U CN201320064438 U CN 201320064438U CN 203098463 U CN203098463 U CN 203098463U
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- CN
- China
- Prior art keywords
- thread
- hydraulic cylinder
- hinged seat
- oil hydraulic
- fit
- 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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- Actuator (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The utility model discloses a hydraulic cylinder. The hydraulic cylinder comprises a hinged base and a rod piece. The hinged base and the rod piece are connected in a matched mode through threads and are also in fit with each other through retaining openings. The tolerance of fit of the retaining openings is smaller than the tolerance of fit of the threads. Due to the fact that the connecting mode of the hinged base and the rod piece of the hydraulic cylinder is improved, the effect that when the threaded connection structure of the hinged base and the rod piece is under the action of external force perpendicular to the hydraulic cylinder, a narrow position of the top or the bottom of each thread does not break is achieved effectively, and the threaded connection strength is enhanced. Moreover, replaceability of parts is realized, and the using cost is lowered due to the fact that only a damaged part needs to be replaced when the hinged base or the rod piece is damaged.
Description
Technical field
The utility model relates to fluid pressure actuator, more particularly, relates to a kind of oil hydraulic cylinder.
Background technique
The fluid cylinder of fluid pressure actuator mainly comprises oil hydraulic cylinder and cylinder.The hinged seat of oil hydraulic cylinder and the Placement of piston rod are mainly divided two kinds at present: a kind of is welding type, and another kind is a thread type.As shown in Figure 1, welding type connects by welding behind piston rod 11 ' and the hinged seat 21 ' bevelling; As shown in Figure 2, be threaded and adopt piston rod 12 ' and hinged seat 22 ' to process internal and external screw thread respectively, tighten with special tooling during installation, increase locking device in case of necessity.
There is following shortcoming in the hinged seat of oil hydraulic cylinder with the above-mentioned two kinds of Placements of piston rod: it is complicated that welding type is connected processing technology, welding may exist defective such as pore, slag inclusion etc., also may be because the high temperature that welding produces produces stress at material internal, and welding back earrings and piston rod form integral body, caused the not replaceability of part; The major defect that thread type connects is that screw thread does the time spent in the external force that is subjected to perpendicular to piston rod, easily from the narrow and small fracture of threaded top or bottom.
The model utility content
The utility model is intended to solve the hinged seat of oil hydraulic cylinder and the screw connection structure of rod member is done the time spent in the external force that is subjected to perpendicular to oil hydraulic cylinder, does not rupture in the narrow and small place in threaded top or bottom.
For addressing the above problem, the utility model provides a kind of oil hydraulic cylinder, this oil hydraulic cylinder comprises hinged seat and rod member, described hinged seat is connected by screw-thread fit with described rod member, described hinged seat and described rod member also cooperate by seam, and the fit tolerance that described seam cooperates is less than the fit tolerance of described screw-thread fit.
Preferably, described rod member is a piston rod, one end of described piston rod is provided with internal thread, described internal thread outer end is provided with inner stopper, one end of described hinged seat is provided with outside thread, described outside thread the inner is provided with outer stopper, and described internal thread and described outside thread form screw-thread fit, and described inner stopper and described outer stopper form seam and cooperate.
Preferably, described inner stopper and described outer stopper are cylindric.
Preferably, the fit tolerance of the effective diameter of thread of described screw-thread fit is less than the tolerance of described seam cooperation.
Preferably, described hinged seat is bulb formula hinged seat, earrings formula hinged seat or recessed ball formula hinged seat.
Preferably, described rod member is a piston rod, one end of described piston rod is provided with outside thread, described outside thread the inner is provided with outer stopper, described hinged seat one end is provided with internal thread, described internal thread outer end is provided with inner stopper, and described outside thread and described internal thread form screw-thread fit, and described outer stopper and described inner stopper form seam and cooperate.
Preferably, described rod member is a piston rod, one end of described piston rod is provided with internal thread, the exterior edge face of described piston rod is provided with outer stopper, one end of described hinged seat is provided with outside thread, described outside thread the inner is provided with inner stopper, and described internal thread and described outside thread form screw-thread fit, and described outer stopper and described inner stopper form seam and cooperate.
Preferably, described rod member is a cylinder barrel, and described hinged seat is a cylinder bottom.
The utility model by having improved oil hydraulic cylinder hinged seat and the Placement of rod member, strengthened the intensity that is threaded, realized the convertibility of part, damaging the back at hinged seat or rod member only needs to change the part that damages, and has reduced user cost.Adopt that hydraulic cylinder structure of the present utility model is simple, carrying is more reliable, it is reasonable that technology more becomes.
Other advantages of the present utility model and beneficial effect will elaborate in embodiment subsequently.
Description of drawings
Accompanying drawing is to be used to provide further understanding of the present utility model, and constitutes the part of specification, is used from explanation the utility model with following embodiment one, but should not constitutes restriction of the present utility model.In the accompanying drawings,
Fig. 1 is the schematic representation that the hinged seat of oil hydraulic cylinder in the prior art is connected with the piston rod welding type;
Fig. 2 is the schematic representation that the hinged seat of oil hydraulic cylinder in the prior art is connected with the piston rod thread formula;
Fig. 3 is first embodiment's schematic representation of the utility model oil hydraulic cylinder;
Fig. 4 is the structural representation of the piston rod among first embodiment;
Fig. 5 is the structural representation of the bulb formula hinged seat among first embodiment;
Fig. 6 is second embodiment's schematic representation of the utility model oil hydraulic cylinder; And
Fig. 7 is the 3rd embodiment's schematic representation of the utility model oil hydraulic cylinder.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is elaborated.Should be understood that embodiment described herein only is used for description and interpretation the utility model, is not limited to the utility model.
Oil hydraulic cylinder generally comprises cylinder bottom, cylinder barrel, piston rod, and cylinder bottom and/or piston rod are provided with the hinged seat that is connected with miscellaneous part.In the utility model, the element that is used for linking to each other with miscellaneous part that is connected with hinged seat is referred to as rod member, and particularly, rod member is piston rod or cylinder barrel.
Oil hydraulic cylinder of the present utility model comprises hinged seat and rod member, and hinged seat is connected by screw-thread fit with rod member, and hinged seat and rod member also cooperate by seam, and the fit tolerance that seam cooperates is less than the fit tolerance of described screw-thread fit.When oil hydraulic cylinder is subjected to external force, partly bears by the bigger seam of fit tolerance perpendicular to the component that rod member is axial, thereby protected the smaller helical thread portion of tolerance injury-free.
Shown in Fig. 3 ~ 5, in preferred first embodiment of the utility model, oil hydraulic cylinder comprises piston rod 11 and bulb formula hinged seat 21, one end of piston rod 11 is provided with internal thread 31, the outer end of internal thread 31 is provided with inner stopper 41, an end relative with bulb of bulb formula hinged seat 21 is provided with outside thread 32, outside thread the inner is provided with outer stopper 42, interior spiral shell 31 and outside thread 32 form screw-thread fit, inner stopper 41 and outer stopper 42 form seam and cooperate, and wherein the fit tolerance of screw-thread fit is less than the fit tolerance of seam cooperation.The shape of seam can be cylindric, coniform or other shapes.
Preferably, inner stopper 41 and outer stopper 42 are cylindric, and inner stopper is a counterbore, and diameter is φ D, and the diameter of outer stopper is φ d.Columned seam more helps controlling machining accuracy in the manufacturing, reduces production costs.
Preferably, the fit tolerance of effective diameter of thread M is less than the fit tolerance of seam cooperation.After the threaded together, because the fit tolerance that the fit tolerance of effective diameter of thread cooperates less than seam, when oil hydraulic cylinder was subjected to component perpendicular to the piston rod axis, this component was born by seam, screw thread still only is subjected to the piston rod axial thrust load, avoids the screw thread sharp corner to rupture because of the external force effect.
Fig. 6 is preferred second embodiment of the utility model, and this embodiment's oil hydraulic cylinder comprises piston rod 12 and recessed ball formula hinged seat 22, is that with first embodiment's difference piston rod 12 is outside thread and outer stopper, and recessed ball formula hinged seat 22 is internal thread and inner stopper.Those skilled in the art are according to the described principle of first embodiment, and the annexation in conjunction with Fig. 6 is appreciated that the piston rod 12 and the recessed ball formula hinged seat 22 of second embodiment's oil hydraulic cylinder does not repeat them here.
Fig. 7 is preferred the 3rd embodiment of the utility model, and this embodiment's oil hydraulic cylinder comprises piston rod 13 and bulb formula hinged seat 23, is that with first embodiment's difference piston rod 13 is internal thread and outer stopper, and bulb formula hinged seat 23 is outside thread and inner stopper.Those skilled in the art are according to the described principle of first embodiment, and the annexation in conjunction with Fig. 7 is appreciated that the piston rod 13 and the recessed ball formula hinged seat 23 of the 3rd embodiment's oil hydraulic cylinder does not repeat them here.
The utility model by having improved oil hydraulic cylinder hinged seat and the Placement of rod member, strengthened the intensity that is threaded, realized the convertibility of part, damaging the back at hinged seat or rod member only needs to change the part that damages, and has reduced user cost.
According to the demand difference of oil hydraulic cylinder, the form of hinged seat can be earrings formula hinged seat, recessed ball formula hinged seat or other forms of hinged seat, the form that is not limited to provide in the embodiment.Those skilled in the art are according to principle of the present utility model, adopt above-mentioned first, second and the 3rd embodiment's mode all within protection domain of the present utility model in the Placement of cylinder barrel and cylinder bottom.
Other have the drive cylinder that two elements need adopt above-mentioned mode of execution to connect cylinders etc., all should be considered as the disclosed content of the utility model.
In technical conceive scope of the present utility model, technological scheme is carried out multiple simple modification, all should be within protection domain of the present utility model; As long as without prejudice to the thought of the invention, various different embodiments of the present utility model are carried out combination in any, all should be considered as the disclosed content of the utility model.
Claims (8)
1. oil hydraulic cylinder, this oil hydraulic cylinder comprises hinged seat and rod member, and described hinged seat is connected by screw-thread fit with described rod member, it is characterized in that, described hinged seat and described rod member also cooperate by seam, and the fit tolerance that described seam cooperates is less than the fit tolerance of described screw-thread fit.
2. oil hydraulic cylinder according to claim 1, it is characterized in that, described rod member is a piston rod, one end of described piston rod is provided with internal thread, described internal thread outer end is provided with inner stopper, and an end of described hinged seat is provided with outside thread, and described outside thread the inner is provided with outer stopper, described internal thread and described outside thread form screw-thread fit, and described inner stopper and described outer stopper form seam and cooperate.
3. oil hydraulic cylinder according to claim 2 is characterized in that, described inner stopper and described outer stopper are cylindric.
4. oil hydraulic cylinder according to claim 3 is characterized in that, the tolerance that the fit tolerance of the effective diameter of thread of described screw-thread fit cooperates less than described seam.
5. oil hydraulic cylinder according to claim 4 is characterized in that, described hinged seat is bulb formula hinged seat, earrings formula hinged seat or recessed ball formula hinged seat.
6. oil hydraulic cylinder according to claim 1, it is characterized in that, described rod member is a piston rod, one end of described piston rod is provided with outside thread, described outside thread the inner is provided with outer stopper, and described hinged seat one end is provided with internal thread, and described internal thread outer end is provided with inner stopper, described outside thread and described internal thread form screw-thread fit, and described outer stopper and described inner stopper form seam and cooperate.
7. oil hydraulic cylinder according to claim 1, it is characterized in that, described rod member is a piston rod, one end of described piston rod is provided with internal thread, the exterior edge face of described piston rod is provided with outer stopper, and an end of described hinged seat is provided with outside thread, and described outside thread the inner is provided with inner stopper, described internal thread and described outside thread form screw-thread fit, and described outer stopper and described inner stopper form seam and cooperate.
8. oil hydraulic cylinder according to claim 1 is characterized in that, described rod member is a cylinder barrel, and described hinged seat is a cylinder bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320064438 CN203098463U (en) | 2013-02-05 | 2013-02-05 | Hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320064438 CN203098463U (en) | 2013-02-05 | 2013-02-05 | Hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203098463U true CN203098463U (en) | 2013-07-31 |
Family
ID=48849868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320064438 Expired - Fee Related CN203098463U (en) | 2013-02-05 | 2013-02-05 | Hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203098463U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107152528A (en) * | 2016-03-05 | 2017-09-12 | 杨双来 | Hydraulic cylinder piston rod and earrings attachment structure |
-
2013
- 2013-02-05 CN CN 201320064438 patent/CN203098463U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107152528A (en) * | 2016-03-05 | 2017-09-12 | 杨双来 | Hydraulic cylinder piston rod and earrings attachment structure |
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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: 20130731 Termination date: 20150205 |
|
| EXPY | Termination of patent right or utility model |