CN102852902A - Guide sleeve mounting structure of driving cylinder, driving cylinder and blocking key - Google Patents
Guide sleeve mounting structure of driving cylinder, driving cylinder and blocking key Download PDFInfo
- Publication number
- CN102852902A CN102852902A CN2012103518314A CN201210351831A CN102852902A CN 102852902 A CN102852902 A CN 102852902A CN 2012103518314 A CN2012103518314 A CN 2012103518314A CN 201210351831 A CN201210351831 A CN 201210351831A CN 102852902 A CN102852902 A CN 102852902A
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- guide sleeve
- mounting structure
- cylinder barrel
- card key
- sleeve mounting
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Abstract
The invention discloses a guide sleeve mounting structure of a driving cylinder. The guide sleeve mounting structure comprises a cylinder barrel (1) and a guide sleeve (2) which is hermetically arranged on the end of the cylinder barrel; a blocking key (3) is arranged between the cylinder barrel and the guide sleeve; a key slot (11) for containing the blocking key is arranged in the cylinder barrel, wherein the key slot is an arc slot; and a plurality of arc protrusions (31) contained in the key slot in a way of being matched with the key slot in shape are arranged on the blocking key along a radial direction. The invention also provides a driving cylinder with the guide sleeve mounting structure and a blocking key; a plurality of arc protrusions arranged in an axial direction are arranged on the blocking key; the section areas of the arc protrusions are gradually reduced towards the outside along the radial direction. With the adoption of the arc protrusions formed on the blocking key of the guide sleeve mounting structure in the radial direction, the stress of the key slot matched with the blocking key in shapes can be reasonable, and the stress concentration is unlikely to occur, so that the guide sleeve mounting structure cannot be damaged and is longer in service life, in addition, the service life of the driving cylinder is prolonged.
Description
Technical field
The present invention relates to the guide sleeve installing area of drive cylinder, particularly, relate to a kind of guide sleeve mounting structure of drive cylinder, use drive cylinder and the card key of use in this guide sleeve mounting structure of this guide sleeve mounting structure.
Background technique
Drive cylinder (oil hydraulic cylinder, pneumatic linear actuator) is widely used in the various fields, and the fore and aft motion by piston rod drives various machine operations.Wherein for piston rod is led, usually in the cylinder barrel end of drive cylinder guide sleeve is installed, and is passed the center of guide sleeve by piston rod, so that piston rod is led.Wherein, this guide sleeve need to bear thrust load and the radial load that piston rod and internal work medium (such as hydraulic oil) bring.Mainly the radial load from piston rod can be delivered to by the surface of contact of guide sleeve and cylinder barrel on the cylinder barrel, and mainly the thrust load from working medium then needs mounting structure to be delivered on the cylinder barrel.In the prior art, usually adopt the mode that card key is installed between guide sleeve and cylinder barrel to transmit thrust load.Yet, because the cross section of existing card key is rectangle, to concentrate so that for the keyway that assembles card key stress occurs easily on the cylinder barrel, force-bearing situation is poor, thereby causes the easy fatigue ruption in keyway place on the cylinder barrel.
Summary of the invention
An object of the present invention is to provide a kind of guide sleeve mounting structure of drive cylinder, the keyway reasonable stress in this guide sleeve mounting structure on the cylinder barrel, the life-span is high.
Another object of the present invention provides a kind of drive cylinder, and this drive cylinder uses the mounting structure of guide sleeve provided by the invention.
A further object of the present invention provides a kind of card key, and this card key can be so that the keyway reasonable stress be difficult for producing stress and concentrates, and the life-span is high.
To achieve these goals, according to an aspect of the present invention, a kind of guide sleeve mounting structure of drive cylinder is provided, comprise that cylinder barrel and sealing are installed in the guide sleeve of this cylinder barrel end, be provided with card key between described cylinder barrel and the described guide sleeve, arrange on the described cylinder barrel and the keyway that holds described card key, described keyway is curve bath, and described card key is contained in the arc convex in the described keyway with radially being formed with form fit.
Preferably, described arc convex is a plurality of and is formed on vertically on the described card key, and these a plurality of arc convex are contained in respectively in a plurality of described keyways.
Preferably, the sectional area of described arc convex radially diminishes toward the outer side gradually.
Preferably, described card key is a plurality of and is arcuate structure that these a plurality of card keys are along the circumferential arrangement of described cylinder barrel and described guide sleeve.
Preferably, described card key is that four and structure are identical, and these four card keys consist of circle configurations.
Preferably, the outer end of described guide sleeve is equipped with gland, and described card key is arranged between described guide sleeve and the described gland.
Preferably, described gland embeds between described guide sleeve and the described cylinder barrel and by fastening piece and is removably mounted on the described guide sleeve.
Preferably, described cylinder barrel end is along circumferentially forming L shaped projection, described gland is correspondingly along circumferentially forming n shape groove, described L shaped convex shape is inserted in the described n shape groove ordinatedly, and described gland is removably mounted on the described guide sleeve by fastening piece, and the piston rod of described drive cylinder passes the center of described gland.
Preferably, be provided with the 3rd Sealing between described gland and the described cylinder barrel.
Preferably, be provided with guide ring between described gland and the described piston rod.
According to a further aspect in the invention, provide a kind of drive cylinder, described drive cylinder comprises guide sleeve mounting structure provided by the invention.
In accordance with a further aspect of the present invention, provide a kind of card key, be formed with a plurality of arc convex of arranging vertically on the described card key, the sectional area of these a plurality of arc convex radially diminishes toward the outer side gradually.
Pass through technique scheme, because the arc convex that the card key in the guide sleeve mounting structure provided by the invention radially forms, therefore can so that the reasonable stress of the keyway of form fit with it be difficult for producing stress and concentrate, thereby the not fragile life-span is higher, and improves the life-span of drive cylinder.
Other features and advantages of the present invention will partly be described in detail in embodiment subsequently.
Description of drawings
Accompanying drawing is to be used to provide a further understanding of the present invention, and consists of the part of specification, is used from explanation the present invention with following embodiment one, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the partial schematic sectional view of the drive cylinder that provides of first embodiment of the invention;
Fig. 2 is the structure for amplifying schematic representation of A section among Fig. 1;
Fig. 3 is the structural representation of the card key used in the guide sleeve mounting structure provided by the invention;
Fig. 4 is the partial schematic sectional view of the drive cylinder that provides of second embodiment of the invention.
Description of reference numerals
1 cylinder barrel, 2 guide sleeves
3 card keys, 4 glands
5 fastening pieces, 6 piston rods
8 guide rings, 10 dust rings
11 keyways, 12 L shaped projections
31 protruding 41 n shape grooves
91 first Sealings, 92 second Sealings
93 linings 94 the 3rd Sealing
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated.Should be understood that embodiment described herein only is used for description and interpretation the present invention, is not limited to the present invention.
In the present invention, do not doing in the situation of opposite explanation, the situation when drive cylinder provided by the invention works is undefined usually such as " inside and outside " for the noun of locality of use, and take cylinder barrel as example, a side at guide sleeve place is inboard, and opposite side then is the outside.Similarly, take gland as example, then a side at guide sleeve place is inboard, and opposite side is the outside.Need to prove that these nouns of locality only are used for explanation the present invention, are not limited to the present invention.
As shown in Figures 1 to 4, the invention provides a kind of guide sleeve mounting structure of drive cylinder, comprise that cylinder barrel 1 and sealing are installed in the guide sleeve 2 of this cylinder barrel end, wherein, can be by the second Sealing 92(any static seal structure well known in the art be set between cylinder barrel 1 and guide sleeve 2), and the first Sealing 91(any movable sealing structure well known in the art is set) between piston rod 6 and guide sleeve 2, install with the sealing that realizes guide sleeve 2, can also between piston rod 6 and guide sleeve 2, lining 93 be set in addition, so that the support of 2 pairs of piston rods 6 of guide sleeve more firm, and reduce the wearing and tearing of 6 pairs of guide sleeves 2 of piston rod.Wherein, in order to bear the thrust load of mainly bringing from working medium (such as hydraulic oil), be provided with card key 3 between cylinder barrel 1 and the guide sleeve 2, wherein arrange on the cylinder barrel 1 and the keyway 11 that holds card key 3, in order to realize purpose of the present invention, in the present invention, the keyway 11 that forms on the cylinder barrel 1 is curve bath, and card key 3 is contained in the arc convex 31 in the keyway 11 with then radially being formed with form fit.Therefore, the cooperation of the keyway 11 by this arc convex 31 and arc, axial force transmission that can guide sleeve 3 is suffered is to cylinder barrel 1.And, because keyway and arc convex 31 are arcuate structure, can effectively avoid the concentrated problem of stress that bring the rectangular cross-section in the prior art, so that the reasonable stress of the keyway 11 on the cylinder barrel 1, indefatigability is damaged, the life-span is higher.
Wherein in order further to improve the force-bearing situation of keyway 11, in two kinds of mode of executions provided by the invention, as shown in Figures 1 to 4 all preferably, arc convex 31 on the card key 3 is a plurality of and is formed on vertically on the card key 3, and these a plurality of arc convex 31 are contained in respectively in a plurality of keyways 11.Therefore, guide sleeve 2 suffered thrust loads can be shared in each keyway 11, compare the prior art of only having a keyway, the present invention can further improve the force-bearing situation of keyway 11, in addition, because each keyway 11 stressed less, can be so that cylinder barrel 1 need not be made be very thick, namely can be when bearing cylinder barrel 1 conveniently make and save material.Thereby so that guide sleeve mounting structure practicability provided by the invention is stronger.
Need to prove that " arc " related among the present invention is not limited in arc structure, those skilled in the art can be understood that, as long as do not form corner angle on the overall structure but structure by arc transition all should drop in protection scope of the present invention.Wherein, as a kind of preferred embodiment, as described in Figure 2, the sectional area of arc convex 31 radially diminishes toward the outer side gradually, this arc convex 31 can form the projection that is roughly trapezium structure, and the corner angle of this trapezium structure are arc transition, thereby so that the more reasonable stress of the keyway 11 of form fit is reliable with it, avoided producing the problem that stress is concentrated so that and life-span of the keyway 11 on the cylinder barrel 1 longer.
In addition, in preferred implementation of the present invention, as shown in Figure 3, in order conveniently to produce and install above-mentioned card key 3, card key 3 provided by the invention is a plurality of and is arcuate structure, these a plurality of card keys 3 are along the circumferential arrangement of cylinder barrel 1 and guide sleeve 2, equably guide sleeve 2 suffered thrust loads are delivered on the cylinder barrel 1.Wherein as a kind of embodiment, card key 3 is that four and structure are identical, and the circle configurations of these four card key 3 completes all should be delivered on the cylinder barrel 1 to finish the thrust load of will bear on guide sleeve 2 complete cycles.Certainly, except 4, according to the assembling needs, commonly used also have 3 modes that card key makes up, and all should drop in protection scope of the present invention for the change of this type of quantity.
Except above-mentioned card key structure, in guide sleeve mounting structure provided by the invention, the outer end of guide sleeve 2 also is equipped with gland 4, and is stable with the further so that installation of guide sleeve.Wherein, above-mentioned card key 3 can be arranged between guide sleeve 2 and the gland 4.The present invention will be described to the invention provides two kinds of mode of executions herein, and these two kinds of mode of executions only are used for explanation the present invention, are not limited to the present invention.
In the first mode of execution as shown in Figure 1, gland 4 embeds between guide sleeve 2 and the cylinder barrel 1 and by fastening piece 5 and is removably mounted on the guide sleeve 2.Namely this gland 4 is ring structure, and this ring structure is embedded in guide sleeve 2 and the cylinder barrel 1 formed circular groove, thereby so that the mounting structure between guide sleeve provided by the invention 2 and the cylinder barrel 1 is more firm.Wherein fastening piece 5 can be preferably a plurality of screws, and the present invention does not limit this.
As a kind of alternative, as shown in Figure 4, be different from gland 4 Embedded mounting types among Fig. 1, cylinder barrel 1 end is L shaped protruding 12 along circumferentially forming, and gland 4 is correspondingly along circumferentially forming n shape groove 41, after installation, L shaped protruding 12 can be inserted into to form fit in the n shape groove 41, and gland 4 also is preferably screw by fastening piece 5() be removably mounted on the guide sleeve 2, at this moment, the piston rod 6 of drive cylinder can pass the center of gland 4.Therefore, in this structure, gland 4 can cooperate better with cylinder barrel 1, then can the mounting structure between guide sleeve 2 and the cylinder barrel 1 is more firm by fastening piece 5.Wherein in order further to seal guide sleeve mounting structure of the present invention, preferably, be provided with the 3rd Sealing 94 between gland 4 and the cylinder barrel 1.The 3rd Sealing 94 optional usefulness have personnel's Sealing well known in the art or the sealing configurations such as O type circle of waterproof and dust reduction capability.In addition, in order to guarantee the connective stability between piston rod 6 and the gland 4, preferably, between gland 4 and piston rod 6, also be provided with guide ring 8, this guide ring 8 can so that gland 4 better piston rod 6 is supported, and the wearing and tearing of 6 pairs of glands 4 of minimizing piston rod, wherein guide ring 8 can adopt with same material or other high-abrasive materials of above-mentioned lining and make.In addition, as shown in Figure 4, also can dust ring 10 also be set in the outside of guide ring 8, enter to prevent dust, thereby avoid the wearing and tearing of 6 pairs of glands of piston rod.For above-mentioned concrete structure, those skilled in the art can also make other change that can think or replacements, but only this change and replace and all should drop in protection scope of the present invention.
To sum up, the present invention is by providing a kind of novel card key, be formed with a plurality of arc convex 31 of arranging vertically on this card key 3, the sectional area of these a plurality of arc convex 31 radially diminishes toward the outer side gradually, can so that the life-span of the keyway on the cylinder barrel in the guide sleeve mounting structure provided by the invention longer, avoiding producing stress concentrates, and can reduce the thickness of cylinder barrel appropriate section, economical with materials, and so that use the drive cylinder of this guide sleeve mounting structure, for example oil hydraulic cylinder has higher practicability and promotional value.
Below describe by reference to the accompanying drawings preferred implementation of the present invention in detail; but; the present invention is not limited to the detail in the above-mentioned mode of execution; in technical conceive scope of the present invention; can carry out multiple simple variant to technological scheme of the present invention, these simple variant all belong to protection scope of the present invention.
Need to prove in addition, each concrete technical characteristics described in above-mentioned embodiment in reconcilable situation, can make up by any suitable mode, for fear of unnecessary repetition, the present invention is to the no longer separately explanation of various possible compound modes.
In addition, also can carry out combination in any between the various mode of execution of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (12)
1. the guide sleeve mounting structure of a drive cylinder, comprise that cylinder barrel (1) and sealing are installed in the guide sleeve (2) of this cylinder barrel end, be provided with card key (3) between described cylinder barrel (1) and the described guide sleeve (2), described cylinder barrel (1) upward arranges and holds the keyway (11) of described card key (3), it is characterized in that, described keyway (11) is curve bath, and described card key (3) is contained in the arc convex (31) in the described keyway (11) with radially being formed with form fit.
2. guide sleeve mounting structure according to claim 1 is characterized in that, described arc convex (31) is a plurality of and is formed on vertically on the described card key (3), and these a plurality of arc convex (31) are contained in respectively in a plurality of described keyways (11).
3. guide sleeve mounting structure according to claim 1 is characterized in that, the sectional area of described arc convex (31) radially diminishes toward the outer side gradually.
4. the described guide sleeve mounting structure of any one is characterized in that according to claim 1-3, and described card key (3) is a plurality of and is arcuate structure that these a plurality of card keys (3) are along the circumferential arrangement of described cylinder barrel (1) and described guide sleeve (2).
5. guide sleeve mounting structure according to claim 4 is characterized in that, described card key (3) is that four and structure are identical, and these four card keys (3) consist of circle configurations.
6. the described guide sleeve mounting structure of any one is characterized in that according to claim 1-3, and the outer end of described guide sleeve (2) is equipped with gland (4), and described card key (3) is arranged between described guide sleeve (2) and the described gland (4).
7. the mounting structure of guide sleeve according to claim 6 is characterized in that, described gland (4) embeds between described guide sleeve (2) and the described cylinder barrel (1) and is removably mounted on the described guide sleeve (2) by fastening piece (5).
8. guide sleeve mounting structure according to claim 6, it is characterized in that, described cylinder barrel (1) end is along circumferentially forming L shaped projection (12), described gland (4) is correspondingly along circumferentially forming n shape groove (41), be inserted in the described n shape groove (41) to described L shaped projection (12) form fit, and described gland (4) is removably mounted on the described guide sleeve (2) by fastening piece (5), and the piston rod of described drive cylinder (6) passes the center of described gland (4).
9. guide sleeve mounting structure according to claim 8 is characterized in that, is provided with the 3rd Sealing (94) between described gland (4) and the described cylinder barrel (1).
10. guide sleeve mounting structure according to claim 9 is characterized in that, is provided with guide ring (8) between described gland (4) and the described piston rod (6).
11. a drive cylinder is characterized in that, described drive cylinder comprises according to claim 1 the described guide sleeve mounting structure of any one in-10.
12. a card key is characterized in that, is formed with a plurality of arc convex (31) of arranging vertically on the described card key (3), the sectional area of these a plurality of arc convex (31) radially diminishes toward the outer side gradually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210351831.4A CN102852902B (en) | 2012-09-20 | 2012-09-20 | The guide sleeve mounting structure of drive cylinder, drive cylinder and card key |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210351831.4A CN102852902B (en) | 2012-09-20 | 2012-09-20 | The guide sleeve mounting structure of drive cylinder, drive cylinder and card key |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102852902A true CN102852902A (en) | 2013-01-02 |
| CN102852902B CN102852902B (en) | 2015-11-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210351831.4A Active CN102852902B (en) | 2012-09-20 | 2012-09-20 | The guide sleeve mounting structure of drive cylinder, drive cylinder and card key |
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| Country | Link |
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| CN (1) | CN102852902B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104500496A (en) * | 2014-12-16 | 2015-04-08 | 中煤北京煤矿机械有限责任公司 | Three-section four-piece split guide sleeve structure for oil cylinder |
| CN105090160A (en) * | 2015-09-30 | 2015-11-25 | 柳州双吉机械有限公司 | Double-acting piston type hydraulic cylinder |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201330770Y (en) * | 2008-12-05 | 2009-10-21 | 韶关液压件厂有限公司 | Hydraulic cylinder located and locked by clip key |
| CN201560998U (en) * | 2009-11-24 | 2010-08-25 | 中船重工中南装备有限责任公司 | Hydraulic oil cylinder with novel guide sleeve structure |
| CN101956741A (en) * | 2010-10-25 | 2011-01-26 | 潘井仁 | Conveniently-disassembled oil cylinder of hydraulic starting and shutting machine |
| CN201934418U (en) * | 2011-01-19 | 2011-08-17 | 徐州徐工液压件有限公司 | Novel cylinder head connecting component structure for hydraulic cylinder |
| CN201934419U (en) * | 2011-01-28 | 2011-08-17 | 张家口长城液压油缸有限公司 | Novel connecting structure of a hydraulic cylinder guide sleeve |
| CN102434672A (en) * | 2011-10-31 | 2012-05-02 | 湖南特力液压有限公司 | Hydraulic cylinder sealing structure |
| CN102635596A (en) * | 2012-04-26 | 2012-08-15 | 三一重工股份有限公司 | Guide sleeve, guide sleeve structure and oil cylinder |
-
2012
- 2012-09-20 CN CN201210351831.4A patent/CN102852902B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201330770Y (en) * | 2008-12-05 | 2009-10-21 | 韶关液压件厂有限公司 | Hydraulic cylinder located and locked by clip key |
| CN201560998U (en) * | 2009-11-24 | 2010-08-25 | 中船重工中南装备有限责任公司 | Hydraulic oil cylinder with novel guide sleeve structure |
| CN101956741A (en) * | 2010-10-25 | 2011-01-26 | 潘井仁 | Conveniently-disassembled oil cylinder of hydraulic starting and shutting machine |
| CN201934418U (en) * | 2011-01-19 | 2011-08-17 | 徐州徐工液压件有限公司 | Novel cylinder head connecting component structure for hydraulic cylinder |
| CN201934419U (en) * | 2011-01-28 | 2011-08-17 | 张家口长城液压油缸有限公司 | Novel connecting structure of a hydraulic cylinder guide sleeve |
| CN102434672A (en) * | 2011-10-31 | 2012-05-02 | 湖南特力液压有限公司 | Hydraulic cylinder sealing structure |
| CN102635596A (en) * | 2012-04-26 | 2012-08-15 | 三一重工股份有限公司 | Guide sleeve, guide sleeve structure and oil cylinder |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104500496A (en) * | 2014-12-16 | 2015-04-08 | 中煤北京煤矿机械有限责任公司 | Three-section four-piece split guide sleeve structure for oil cylinder |
| CN105090160A (en) * | 2015-09-30 | 2015-11-25 | 柳州双吉机械有限公司 | Double-acting piston type hydraulic cylinder |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102852902B (en) | 2015-11-18 |
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