CN203476907U - Supporting and clamping device in floating support cylinder - Google Patents
Supporting and clamping device in floating support cylinder Download PDFInfo
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- CN203476907U CN203476907U CN201320580509.9U CN201320580509U CN203476907U CN 203476907 U CN203476907 U CN 203476907U CN 201320580509 U CN201320580509 U CN 201320580509U CN 203476907 U CN203476907 U CN 203476907U
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- supporting
- conical surface
- elastomer
- piston
- raceway
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Abstract
The utility model relates to a supporting and clamping device in a floating support cylinder. The device comprises a supporting piston located in a cylinder body and an elastomer. The inner surface of the supporting piston and the outer surface of the elastomer are designed to be an inner conical surface and an outer conical surface respectively, the inner conical surface and the outer conical surface are matched, and steel balls are arranged between the inner conical surface and the outer conical surface. The device is characterized in that the inner conical surface of the supporting piston is provided with inner rolling channels from top to bottom, the inner rolling channels are inward concave, a plurality of the inner rolling channels are arranged circumferentially along the supporting piston, the outer conical surface of the elastomer is provided with a plurality of outer rolling channels corresponding to the inner rolling channels in a one-to-one mode, the outer rolling channels are inward concave, and the steel balls are located in rolling channels composed of the corresponding inner rolling channels and the corresponding outer rolling channels. By means of the structure, original point contact is changed into linear contact, so that ball receiving stress between the steel balls and the elastomer and between the steel balls and the supporting piston is reduced. Accordingly, bearing capacity of the supporting cylinder can be improved, service life of the supporting cylinder can be prolonged, mechanical property requirements of materials of which the elastomer is made of can be reduced, and cost can be lowered under the same requirement.
Description
Technical field
The utility model relates to a kind of supporting oil cylinder, relates in particular to the supporting holding device in a kind of floating support oil cylinder.
Background technique
Hydraulic floating supporting oil cylinder is mainly used in machining, after contacting with workpiece to be machined compression, workpiece to be machined is produced to supporting force, to reduce the vibration of workpiece to be machined in course of working, prevent the distortion of workpiece to be machined, be a kind of device that workpiece to be machined provides unsteady aiding support.As disclosed a kind of hydraulic pressure support cylinder structure in the Chinese patent notice of authorization number patent documentation that is CN201513409U, it comprises: hydraulic support oil cylinder body, the plunger (supporting rod) that is installed on intrinsic rising piston (ejecting piston) and promotes by rising piston, piston spring (ejector spring), the collet chuck (elastomer) of one support piston and double team plunger is also installed in oil cylinder body, support piston has a rising conical surface, collet chuck has the stressed conical surface corresponding with this rising conical surface, support piston moves up by hydraulic pressure, its rising conical surface produces horizontal-clamping power to the stressed conical surface.This utility model patent also specifically discloses the Organizational Structure relation between each parts: rising piston, plunger, collet chuck, support piston are to be sleeved on successively from inside to outside in hydraulic support oil cylinder body, and bottom is hydraulic oil cavity volume.In the patent documentation that similarly structure is CN101608645A at Chinese patent notice of authorization number for CN203081897U and Chinese patent application publication number, also have open.
In above-mentioned patent documentation, the device that plays supporting clamping action in oil cylinder mainly comprises support piston and collet chuck (elastomer), support piston internal surface is designed to respectively with elastomeric outer surface the inner conical surface and the male cone (strobilus masculinus) that mutually mate, interior at this, between male cone (strobilus masculinus), be provided with steel ball, and in existing hydraulic floating supporting oil cylinder, the opposing side of support piston and collet chuck (elastomer) is often designed to the smooth conical surface matching, this makes steel ball and elastomer, contact between support piston is some contact, such structure can cause steel ball and elastomer, the stress of receiving between support piston is larger, thereby can reduce to a certain extent the bearing capacity of supporting oil cylinder, simultaneously also can reduction of service life, and require high to the mechanical characteristic of collet chuck (elastomer) material therefor, otherwise working life can be shorter.
Model utility content
Technical problem to be solved in the utility model is the present situation for prior art, and a kind of bearing capacity that improves supporting oil cylinder is provided, and long service life, the supporting holding device in the low floating support oil cylinder of cost.
It is the supporting holding device in a kind of floating support oil cylinder that the utility model solves the problems of the technologies described above adopted technological scheme, include the support piston and the elastomer that are positioned at cylinder block, described elastomer sleeve is between described support piston and the supporting rod of oil cylinder, and described support piston internal surface is designed to respectively with elastomeric outer surface the inner conical surface and the male cone (strobilus masculinus) that mutually mate, interior at this, between male cone (strobilus masculinus), be provided with steel ball, it is characterized in that: on the inner conical surface of described support piston, have the interior raceway caving inward from top to bottom, and described interior raceway has a plurality of, respectively along the circumferential distribution of described support piston, on described elastomeric male cone (strobilus masculinus), be provided with described a plurality of interior raceways mutually one to one and the outer raceway caving inward, described steel ball is arranged in the raceway that the inside and outside raceway by correspondence forms.
In above-mentioned further preferred scheme, the cross section of described inside and outside raceway is circular groove, the radius of this circular groove is identical with the radius of steel ball, so that make to reach complete line between steel ball and raceway, contacts, and the bearing capacity of supporting oil cylinder is further improved.
Be preferably, two described raceways are one group, and this many groups raceway is respectively along circumferentially uniform, like this to supporting rod supporting, stressed more even.
Compared with prior art, because the utility model is provided with the inside and outside raceway of mutual correspondence on the inside and outside conical surface, while therefore rolling in the raceway that steel ball forms at so inside and outside raceway, by original some contact, changing line into contacts, thereby can reduce the stress of receiving between steel ball and elastomer, support piston, so not only can improve the bearing capacity of supporting oil cylinder, and can increase the service life, and can also reduce the mechanical characteristic requirement of elastomer material therefor, under equal requirement, can reduce costs.
Accompanying drawing explanation
Fig. 1 is the utility model embodiment's structural representation;
Fig. 2 is that A-A in Fig. 1 is to sectional view;
Fig. 3 is the structural representation of support piston in Fig. 1;
Fig. 4 is the plan view of Fig. 3;
Fig. 5 is the be hit by a bullet structural representation of gonosome of Fig. 1;
Fig. 6 is that B-B in Fig. 5 is to sectional view.
Embodiment
Below in conjunction with accompanying drawing, embodiment is described in further detail the utility model.
As shown in Figures 1 to 6, the supporting clamping application of installation in the present embodiment is in hydraulic floating supporting oil cylinder, and this supporting oil cylinder includes cylinder body 1, liftout attachment and supporting holding device, wherein the internal diameter of cylinder body 1 is 24mm, outer wall has outside thread, and upper-end surface has through hole, and lower end mouth is opened wide; Liftout attachment includes again base 2, ejects piston 3, ejector rod 4, retracting spring a1, supporting rod 5 and ejector spring a2, described base 2 is positioned in the lower end mouth of cylinder body 1, and between base 2 and cylinder body 1, be provided with the first seal ring b1, base 2 sealings are blocked in the lower end mouth of cylinder body 1; In this base 2, be also axially arranged with piston channel 21, in the present embodiment, the upper diameter of this piston channel 21 is less than lower diameter, above-mentionedly eject the bottom that piston 3 is positioned at this piston channel 21, at this, eject on piston and be provided with the second seal ring b2, make to eject piston 3 and in the bottom of piston channel, seal slip.The lower end of above-mentioned ejector rod 4 with eject piston 3 and fix, upper end is stretched in the inner chamber 51 of supporting rod 5.The upper end of above-mentioned supporting rod 5 exposes to described cylinder body after by the through hole on cylinder body, the upper end of this supporting rod 5 crown cap 6 that is threaded.Above-mentioned ejector spring position a2 is in the inner chamber 51 of supporting rod, and its upper and lower end offsets with upper end and the top cap 6 of ejector rod 4 respectively.
Described supporting holding device includes support piston 7, elastomer 8, steel ball 9 and the Returnning spring a3 that is positioned at cylinder body, wherein elastomer 8 is enclosed between above-mentioned supporting rod 5 and support piston 7, and the top wall thickness of support piston 7 is less than bottom wall thickness, and make support piston 7 internal surfaces become rising inner conical surface, the outer surface of elastomer 8 is designed to the male cone (strobilus masculinus) mutually mating with this inner conical surface, steel ball 9 is located between this inside and outside conical surface, the top of support piston 7 is provided with the pad 10 moving on restriction steel ball, always movable between the inside and outside conical surface to guarantee steel ball.The lower end of Returnning spring a3 is against on this pad 10, and the upper edge of upper end and elastomer 8 offsets.In order to increase the effective work area of support piston, the lower end of above-mentioned support piston 7 is provided with the cylindrical boss 71 of hollow, in the present embodiment, the external diameter of the cylindrical boss 71 of this hollow (external diameter is 10mm) is less than the diameter (diameter is 12mm) that ejects piston 3, this cylindrical boss 71 extend in the piston channel 21 of base, and and between the top of piston channel 21, be provided with the 3rd seal ring b3, make this cylindrical boss 71 in the top of piston channel 21, seal slip.
For the ease of making, be more conducive to the stability of work, the inwall of above-mentioned cylindrical boss 71 is provided with a shoulder 72, and the upper and lower end of retracting spring a1 is resisted against respectively this shoulder 72 and ejects on piston 3.Base 2 is provided with vent cap 22, and the inside of piston channel 21 is communicated with outside, in working procedure, can freely breathe, the resistance of air when reducing to eject piston 3 and moving up and down.Upper end periphery at base has a step and makes between base, cylinder body and support piston to form a cavity volume 23 simultaneously, also has the oil inlet passage 24 being connected with this cavity volume on base.
In order further to improve the bearing capacity of supporting oil cylinder, the above-mentioned inside and outside conical surface is also designed to following structure: on the inner conical surface of support piston 7, have the interior raceway 73 caving inward from top to bottom, and interior raceway 73 have a plurality of, respectively along the circumferential distribution of support piston 7; On the male cone (strobilus masculinus) of elastomer 8, be provided with a plurality of interior raceways 73 mutually one to one and the outer raceway 81 caving inward, steel ball 9 is arranged in the raceway that the inside and outside raceway by correspondence forms.In the present embodiment, interior raceway is preferably 16, and also to have the cross section of 16 and inside and outside raceway be circular groove to outer raceway, and the radius of this circular groove is identical with the radius of steel ball.Two described raceways are formed to one group, this many groups raceway is respectively along circumferentially uniform simultaneously, and please refer to the drawing 2 can further improve the bearing capacity of supporting oil cylinder.Adopt after so inside and outside cone structure, can make between steel ball and raceway as line contacts, thereby can reduce the stress of receiving between steel ball and elastomer, support piston, in the bearing capacity that has improved supporting oil cylinder, can increase the service life, and can also reduce the mechanical characteristic requirement of elastomer material therefor.
Except above-mentioned seal ring, between support piston 7 and cylinder body 1, be provided with the 4th seal ring b4, at supporting rod 5 also and between cylinder body through hole surface of contact, be provided with the 5th seal ring b5, between the through hole surface of contact of supporting rod and cylinder body, dust ring b6 is installed simultaneously, when this dust ring b6 can prevent that supporting rod 5 from ejecting, bouncing back, foreign matter enters cylinder body 1, guarantees that supporting oil cylinder can work stably in a long term.
The working procedure of this hydraulic floating supporting oil cylinder is as follows: after hydraulic oil enters in the rodless cavity 25 that ejects piston below, hydraulic oil promotes to eject piston 3, and it is up to overcome retracting spring a1, by ejector spring a2, supporting rod 5 is ejected, retracting spring a1 is compressed gradually, straight when only ejecting piston 3 and touching the cylindrical boss 71 of support piston 7 bottoms, retracting spring a1 is fully compressed in the cylindrical boss 71 of support piston 7, and supporting rod 5 ejects completely to contacting with workpiece 100.In this process, hydraulic oil enters in cavity volume 23 through oil inlet passage 24 simultaneously, but due to Returnning spring a3 to support piston 7 preset downforce, this downforce is greater than and ejects the hydraulic coupling sum obtaining in thrust now of piston 3 and support piston 7, thus support piston 7 not can with supporting rod 5 eject and up.
Afterwards, hydraulic fluid pressure raises, at this moment hydraulic oil enters rodless cavity 25, by oil inlet passage 24, enter cavity volume 23 simultaneously, overcome the pretightening force of Returnning spring a3, promote support piston 7 and eject piston 3 up simultaneously, under the effect of the inside and outside conical surface, by steel ball 9, make elastomer 8 hold supporting rod 5 tightly, complete the supporting to workpiece 100, until reach the working pressure of setting.
When discharging hydraulic fluid pressure, steel ball 9 guarantees that support piston 7 can not produce self-locking, Returnning spring a3 can successfully be pushed into by support piston 7 initial position contacting with base 1, simultaneously retracting spring a1 also will eject piston 3 and push back to initial position, and eject the ejector rod 4 that piston 3 is connected supporting rod 5 is retracted to home position.
In the present embodiment, the oil pressure of hydraulic oil is selected 7MPa, and the conical surface gradient of support piston 7 is set to 5 °, and the radial component of generation is that enclasping force reaches 36.60kN, at least can obtain the friction supporting force of 4.4kN.And the thrust that support piston 7 makes progress is 2.56kN, add and eject the thrust 0.77kN that piston 3 makes progress, amounted to the comprehensive thrust of 3.33kN, be the actual supporting force of supporting oil cylinder.The supporting force of this actual acquisition has improved approximately 30% with respect to 2.56kN.
The foregoing is only preferred implementation of the present utility model, should be understood that, for the ordinary skill in the art, do not departing under principle prerequisite of the present utility model, can also make various deformation and improvement, for example cancel the cylindrical boss of the hollow of support piston lower end, and adopt support piston structure of the prior art.Or when the inner conical surface of support piston is designed to the inner conical surface that declines; it is the bore design of the support piston structure while becoming aperture, upper end to be less than aperture, lower end; elastomeric male cone (strobilus masculinus) is designed to the conical surface matching with the inner conical surface that declines; on so inside and outside conical surface, design above-mentioned inside and outside raceway; a contact can be changed equally into line contact; can there is technique effect of the present utility model equally, thereby such scheme also should be considered as in protection domain of the present utility model.
Claims (3)
1. the supporting holding device in a floating support oil cylinder, include the support piston (7) and the elastomer (8) that are positioned at cylinder block (1), described elastomer (8) is enclosed between the supporting rod (5) of described support piston (7) and oil cylinder, and described support piston (7) internal surface is designed to respectively with the outer surface of elastomer (8) inner conical surface and the male cone (strobilus masculinus) that mutually mate, interior at this, between male cone (strobilus masculinus), be provided with steel ball (9), it is characterized in that: on the inner conical surface of described support piston (7), have the interior raceway (73) caving inward from top to bottom, and described interior raceway has a plurality of, respectively along the circumferential distribution of described support piston (7), on the male cone (strobilus masculinus) of described elastomer (8), be provided with described a plurality of interior raceways mutually one to one and the outer raceway (81) caving inward, described steel ball (9) is arranged in the raceway that the inside and outside raceway by correspondence forms.
2. supporting holding device according to claim 1, is characterized in that: the cross section of described inside and outside raceway is circular groove, and the radius of this circular groove is identical with the radius of described steel ball (9).
3. supporting holding device according to claim 1 and 2, is characterized in that: two described raceways are one group, and this many groups raceway is respectively along circumferentially uniform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320580509.9U CN203476907U (en) | 2013-09-18 | 2013-09-18 | Supporting and clamping device in floating support cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320580509.9U CN203476907U (en) | 2013-09-18 | 2013-09-18 | Supporting and clamping device in floating support cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203476907U true CN203476907U (en) | 2014-03-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320580509.9U Expired - Lifetime CN203476907U (en) | 2013-09-18 | 2013-09-18 | Supporting and clamping device in floating support cylinder |
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| Country | Link |
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| CN (1) | CN203476907U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110871286A (en) * | 2018-08-30 | 2020-03-10 | 苏州丰川电子科技有限公司 | Processing machine tool for notebook computer panel |
-
2013
- 2013-09-18 CN CN201320580509.9U patent/CN203476907U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110871286A (en) * | 2018-08-30 | 2020-03-10 | 苏州丰川电子科技有限公司 | Processing machine tool for notebook computer panel |
| CN110871286B (en) * | 2018-08-30 | 2021-07-27 | 苏州丰川电子科技有限公司 | Processing machine tool for notebook computer panel |
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Granted publication date: 20140312 |