CN202926747U - Hydraulic cylinder and pumping device comprising same - Google Patents
Hydraulic cylinder and pumping device comprising same Download PDFInfo
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- CN202926747U CN202926747U CN 201220612437 CN201220612437U CN202926747U CN 202926747 U CN202926747 U CN 202926747U CN 201220612437 CN201220612437 CN 201220612437 CN 201220612437 U CN201220612437 U CN 201220612437U CN 202926747 U CN202926747 U CN 202926747U
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- sensing unit
- piston
- hydraulic cylinder
- cylinder barrel
- oil hydraulic
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Abstract
The utility model provides a hydraulic cylinder and a pumping device comprising the hydraulic cylinder. The hydraulic cylinder comprises a cylinder barrel, a sensing unit, a rod cavity end cover, a rodless cavity end cover and a piston assembly, wherein the sensing unit is arranged on the cylinder barrel; the rod cavity end cover and the rodless cavity end cover are respectively arranged at the two ends of the cylinder barrel; the piston assembly is arranged in the cylinder barrel in a sliding way; a guide sleeve is arranged at the inner side of the rod cavity end cover of the hydraulic cylinder; a sensing hole is arranged at the end of the guide sleeve extending into the cylinder barrel; the cylinder barrel is fixedly provided with a sensing unit mounting sleeve; after passing through the cylinder barrel, the sensing unit mounting sleeve is arranged in the sensing hole; the sensing unit is arranged in the sensing unit mounting sleeve; the piston assembly comprises a piston, a piston rod and a sensing part which is arranged on the piston or the piston rod and is matched with the sensing unit; and the sensing part is arranged between the piston and the rod cavity end cover. According to the hydraulic cylinder, a sealing piece arranged on the piston is prevented from being damaged due to passing through a sensing unit mounting hole in the cylinder barrel.
Description
Technical field
The utility model relates to the pumping machine field, in particular to a kind of oil hydraulic cylinder and comprise the pumping equipment of this oil hydraulic cylinder.
Background technique
As shown in Figure 1 to Figure 3, the pumping oil cylinder in existing scheme comprises that mainly rodless cavity hydraulic fluid port, rod chamber end cap 20 ', piston 43 ', cylinder barrel 10 ', piston rod 42 ', buffering hydraulic fluid port, approach switch 12 ', guide sleeve 21 ' and static seal group, rod chamber hydraulic fluid port, rodless cavity end cap 30 ' and dynamic seal group, piston guide ring 46 ', metallic packing ring 45 ', signal hydraulic fluid port 114 ', approach switch mounting hole 111 ', approach switch connect screw thread 113 ' etc.
Piston 43 ' and piston rod 42 ' stretch out and the retraction process in, Sealing on piston 43 ' need be through the approach switch mounting hole 111 ' on cylinder barrel 10 ', because approach switch mounting hole 111 ' is larger, elastomer seal commonly used easily damages during by this hole, so the Sealing on piston 43 ' adopts metallic packing ring 45 '.
Sealing on piston adopts metallic packing ring, and because metallic packing ring is high to the required precision of inner hole of cylinder, inner hole of cylinder is difficult for reaching desired precision, causes the interior discharge of metallic packing ring sealing on piston large, can not satisfy system requirements.
As shown in Figure 3, the pumping oil cylinder generally is welded with the signal hydraulic fluid port on cylinder barrel 10 ', approach switch 12 ' is that two-stage coaxial coordinates the structure that requires with the installation of signal hydraulic fluid port 114 ' and cylinder barrel 10 ' herein, the coaxality that is approach switch mounting hole 111 ' and approach switch connection screw thread 113 ' is had relatively high expectations, and locates to be provided with static seal at approach switch mounting hole 111 '.The shortcoming of this structure is: connect the screw thread place at approach switch mounting hole and approach switch, cylinder barrel must be after the welding signal hydraulic fluid port the exigent hole of working axiality and screw thread, difficulty of processing is large, if can not meet the demands after processing, to cause scrapping of whole cylinder barrel, economic loss is large.
The model utility content
The utility model aims to provide a kind of oil hydraulic cylinder and comprises the pumping equipment of this oil hydraulic cylinder, can prevent that Sealing on piston is owing to damaging through the sensing unit mounting hole on cylinder barrel.
to achieve these goals, according to an aspect of the present utility model, a kind of oil hydraulic cylinder is provided, comprise cylinder barrel, be arranged on the sensing unit on cylinder barrel, be separately positioned on rod chamber end cap and the rodless cavity end cap at cylinder barrel two ends, and be slidably disposed on piston assembly in cylinder barrel, the rod chamber end cap inboard of oil hydraulic cylinder is provided with guide sleeve, the end in cylinder barrel of stretching into of guide sleeve is provided with the sensing hole, be fixedly installed the sensing unit installation sleeve on cylinder barrel, the sensing unit installation sleeve passes and is arranged on after cylinder barrel in this sensing hole, sensing unit is arranged in the sensing unit installation sleeve, piston assembly comprises piston, piston rod, and be arranged on piston or piston rod and the induction pieces that matches with sensing unit, induction pieces is between piston and rod chamber end cap.
Further, induction pieces is the induction cover that is set on piston rod.
Further, the second portion of piston rod is Step Shaft, and induction is set on piston rod between the end face of the step end face of Step Shaft and piston.
Further, be arranged with elastomer seal and/or metallic packing ring on piston.
Further, metallic packing ring is a plurality of, along the axially spaced-apart setting of piston.
Further, also be arranged with guide ring on piston.
Further, be provided with seal ring between sensing unit installation sleeve and sensing unit.
According on the other hand of the present utility model, a kind of pumping equipment is provided, comprise oil hydraulic cylinder, this oil hydraulic cylinder is above-mentioned oil hydraulic cylinder.
use the technical solution of the utility model, oil hydraulic cylinder comprises cylinder barrel, be arranged on the sensing unit on cylinder barrel, be arranged on rod chamber end cap and the rodless cavity end cap at cylinder barrel two ends, and be slidably disposed on piston assembly in cylinder barrel, be provided with guide sleeve in the rod chamber end cap of oil hydraulic cylinder, the end that guide sleeve is positioned at cylinder barrel is provided with the sensing hole, be fixedly installed the sensing unit installation sleeve on cylinder barrel, the sensing unit installation sleeve passes and is arranged on after cylinder barrel in this sensing hole, sensing unit is arranged in the sensing unit installation sleeve, piston assembly comprises piston, piston rod, and be arranged on piston or piston rod and the induction pieces that matches with sensing unit, induction pieces is between piston and rod chamber end cap.Because the inducting cell in the utility model is arranged on the guide sleeve position, therefore can limit by the stroke of guide sleeve to piston, make the Sealing on piston can not pass through the mounting hole that sensing unit is installed, this mounting hole just can not cause damage to the Sealing on piston yet.
Description of drawings
The accompanying drawing that consists of a part of the present utility model is used to provide further understanding of the present utility model, and illustrative examples of the present utility model and explanation thereof are used for explaining the utility model, do not consist of improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 shows the structural representation of oil hydraulic cylinder of the prior art;
Fig. 2 shows the piston sealing structure schematic diagram according to the oil hydraulic cylinder of Fig. 1;
Fig. 3 shows the approach switch mounting structure enlarged view according to the oil hydraulic cylinder of Fig. 1;
Fig. 4 shows the sectional structure schematic diagram according to the first embodiment's of the present utility model oil hydraulic cylinder;
Fig. 5 shows the structure for amplifying schematic diagram according to the embodiment's of Fig. 4 oil hydraulic cylinder L place;
Fig. 6 shows the structure for amplifying schematic diagram according to the M place of the embodiment's of Fig. 4 oil hydraulic cylinder;
Sectional structure schematic diagram when Fig. 7 shows hydraulic cylinder piston rod according to the second embodiment of the present utility model and is in retracted mode;
Fig. 8 shows the structure for amplifying schematic diagram according to the embodiment's of Fig. 7 L place;
Fig. 9 shows the structure for amplifying schematic diagram according to the embodiment's of Fig. 7 M place;
Figure 10 shows hydraulic cylinder piston rod according to the second embodiment of the present utility model and is in structural representation when stretching out state; And
Figure 11 shows the structure for amplifying schematic diagram according to the embodiment's of Figure 10 N place.
Embodiment
Hereinafter also describe in conjunction with the embodiments the utility model in detail with reference to accompanying drawing.Need to prove, in the situation that do not conflict, embodiment and the feature in embodiment in the application can make up mutually.
To shown in Figure 6, according to the first embodiment of the present utility model, oil hydraulic cylinder comprises cylinder barrel 10, be arranged on rod chamber end cap 20 and the rodless cavity end cap 30 at cylinder barrel 10 two ends and be slidably disposed on piston assembly 40 in cylinder barrel 10 as Fig. 4.Piston assembly 40 comprise piston rod 42 in the cylindrical shell 11 that is arranged on cylinder barrel 10, be connected to the piston 43 on piston rod 42 and be arranged on piston 43 or piston rod 42 on and the induction pieces 41 that matches with sensing unit 12, induction pieces 41 is arranged with guide ring 46 and Sealing on piston 43 between piston 43 and rod chamber end cap 20,46 pairs of pistons 43 of guide ring play leading role, Sealing can play seal action to piston 43, guarantees the working efficiency of piston 43.Preferably, Sealing is elastomer seal 44, can effectively reduce the interior discharge of piston 43, improves the working efficiency of piston 43.
Be provided with guide sleeve 21 in the rod chamber end cap 20 of oil hydraulic cylinder, the end that guide sleeve 21 is positioned at cylinder barrel 10 is provided with sensing hole 211, be fixedly installed sensing unit installation sleeve 112 on cylinder barrel 10, sensing unit installation sleeve 112 passes and is arranged on after sensing unit mounting hole 111 on cylinder barrel 10 in this sensing hole 211, sensing unit 12 is arranged in sensing unit installation sleeve 112, and induction pieces 41 matches with sensing unit 12.Sensing unit 12 herein is for example approach switch.This induction pieces 41 is the induction cover on the piston rod 42 that is set in piston assembly 40.The external diameter of induction cover is less than the internal diameter of guide sleeve 21, has an effect with approach switch to guarantee the induction cover can enter in guide sleeve 21.
In the present embodiment, the induction cover can coordinate with approach switch, determines the position at piston 43 places, so that approach switch is sent to control system with signal, makes control system carry out corresponding control to pumping system.In piston 43 movement processes, when piston 43 moved to guide sleeve 21 place end, the induction cover arrived the approach switch position, and approach switch sends induced signal, makes 43 stop motions of control system control piston, carries out switch operation.Because approach switch is arranged in sensing hole 211 on guide sleeve 21, therefore when piston 43 moves to guide sleeve 21 position, due to the barrier effect of guide sleeve 21, can't continue motion, Sealing on piston 43 can not pass through sensing unit mounting hole 111, just can not cause damage yet.
Therefore, can sheathed elastomer seal 44 on piston 43, to guarantee the sealing effect of piston 43.
In conjunction with extremely shown in Figure 11 referring to Fig. 7, oil hydraulic cylinder according to the second embodiment of the present utility model, itself and the first embodiment are basic identical, difference is, in the present embodiment, also be arranged with metallic packing ring 45 on piston 43, metallic packing ring 45 can have a plurality of, and arranges along the axial direction interval of piston 43.
Please again in conjunction with extremely shown in Figure 6 referring to Fig. 4, according to embodiment of the present utility model, cylinder barrel 10 comprises cylindrical shell 11, radially is provided with sensing unit mounting hole 111 on cylindrical shell 11, and sensing unit installation sleeve 112 is fixedly installed in sensing unit mounting hole 111.Sensing unit installation sleeve 112 comprises the positioning hole 112b of the detecting means of the tapped hole 112a that is fixedly connected with sensing unit 12 and orientation sensing unit 12.
In the prior art, guarantee simultaneously the quality of fit of approach switch and signal hydraulic fluid port and cylinder barrel due to needs, therefore cylinder barrel needs the exigent positioning hole of working axiality and tapped hole after the welding signal hydraulic fluid port, and signal hydraulic fluid port and cylinder barrel are respectively two parts, so difficulty of processing is very large.And in this application, when processing cylinder barrel 10, can first sensing unit installation sleeve 112 be processed separately, due to sensing unit installation sleeve 112 before being arranged on cylinder barrel 10, independent parts, therefore thread mill drilling 112a and positioning hole 112b on the process equipments such as numerical control machine tool easily, and can effectively guarantee the coaxality of tapped hole 112a and positioning hole 112b, therefore overcome problems of the prior art, can effectively guarantee the installation precision of approach switch.
after sensing unit installation sleeve 112 is machined, can be at correct position place's processing one sensing unit mounting hole 111 of cylinder barrel 10, then sensing unit installation sleeve 112 is fixedly installed in sensing unit mounting hole 111, because tapped hole 112a and the positioning hole 112b of the interior installation approach switch of sensing unit installation sleeve 112 guaranteed coaxality, therefore the quality of fit between sensing unit installation sleeve 112 and sensing unit mounting hole 111 requires lower, allow larger gap, be convenient to the processing of sensing unit mounting hole 111, also reduced the probability of scrapping of cylinder barrel 10, can improve the up-to-standard rate of cylinder barrel 10.Sensing unit 12 in the present embodiment is for example approach switch, also can be other the detection unit of the movement position that can detect the piston 43 in cylinder barrel 10, such as displacement transducer etc.
The advantage of said structure is: after transition connecting sleeve 113 is welded on cylinder barrel 10, only process place's regular screw threads herein, the processing of cylinder barrel 10 herein becomes easily, has avoided therefore causing cylinder barrel 10 to scrap.And two-stage coaxial is arranged on sensing unit installation sleeve 112, because sensing unit installation sleeve 112 is small-sized axial workpieces, be convenient to process on high-precision numerical control device, therefore easily guarantee the two-stage coaxial requirement.
Between sensing unit installation sleeve 112 and sensing unit mounting hole 111, transition connecting sleeve 113 can also be set, sensing unit installation sleeve 112 fixed covers are located in transition connecting sleeve 113.Transition connecting sleeve 113 is one to be welded on the tube-in-tube structure in sensing unit mounting hole 111, and the endoporus of tube-in-tube structure has internal thread, and the periphery of sensing unit installation sleeve 112 has the outside thread with this screw-internal thread fit.Due to the precision of not having relatively high expectations of the cooperation between screw thread, therefore make the cooperating structure between sensing unit installation sleeve 112 and transition connecting sleeve 113 be easy to processing, therefore also be convenient to sensing unit installation sleeve 112 is dismantled, to the replacing of sensing unit installation sleeve 112 and sensing unit 12 with keep in repair convenient.Because this structure is welded on transition connecting sleeve 113 on cylindrical shell 11, and between sensing unit installation sleeve 112 and transition connecting sleeve 113 for being threaded, therefore can be because welding affects tapped hole 112a on sensing unit installation sleeve 112 and the coaxality between positioning hole 112b.
After sensing unit installation sleeve 112 is installed to the precalculated position, sensing unit can be arranged on sensing unit installation sleeve 112, make cylinder barrel 10 can satisfy usage requirement.Be arranged on the sensing unit 12 in sensing unit installation sleeve 112, its test end is in cylinder barrel 10.
Preferably, sensing unit installation sleeve 112 stretches out between the part that enters sensing unit mounting hole 111 after transition connecting sleeve 113 and sensing unit mounting hole 111 and is Spielpassung, larger gap is arranged, when mounted, sensing unit installation sleeve 112 can not be subject to the interference of sensing unit mounting hole 111, therefore more is convenient to install.
In axial direction also be provided with a plurality of buffering hydraulic fluid ports on cylinder barrel 10.
Oil hydraulic cylinder can be oil cylinder or cylinder.This sentences oil cylinder, and to be example be illustrated the working procedure of oil hydraulic cylinder.
When oil cylinder is worked, hydraulic oil enters the rod chamber of oil cylinder from the filler opening of rod chamber, pushing piston 43 is to rodless cavity one lateral movement, after piston 43 moves to correct position, 43 reversing motions of control system control piston, hydraulic oil enters the rodless cavity of oil cylinder from the filler opening of rodless cavity, pushing piston 43 is to rod chamber one lateral movement.When the induction cover on piston 43 cylinders moved to guide sleeve 21 position, approach switch will send induced signal, made control system control piston 43 carry out the motion of lower step.Piston 43 can be subject to stopping of guide sleeve 21, can't continue to the rod chamber motion and through sensing unit mounting hole 111.
According to embodiment of the present utility model, pumping equipment comprises two oil hydraulic cylinders, and this oil hydraulic cylinder is above-mentioned oil hydraulic cylinder.
From above description, can find out, the utility model the above embodiments have realized following technique effect: cylinder barrel comprises cylindrical shell, radially be provided with the sensing unit mounting hole on cylindrical shell, be fixedly installed the sensing unit installation sleeve in the sensing unit mounting hole, the sensing unit installation sleeve comprises the positioning hole of the detecting means of the tapped hole that is fixedly connected with sensing unit and orientation sensing unit.The cylinder barrel of the present embodiment, first required tapped hole and the positioning hole of processing installation sensing unit on the sensing unit installation sleeve, then be fixedly installed on the sensing unit installation sleeve on cylindrical shell, and sensing unit be arranged on the sensing unit installation sleeve.Because the coaxality that the required mounting hole of sensing unit is installed can be by processing to guarantee to the sensing unit installation sleeve separately, therefore can guarantee the installation precision of approach switch, reduce the difficulty of processing of cylinder barrel, improve the up-to-standard rate of cylinder barrel, reduce the cylinder barrel cost of production.
The above is only preferred embodiment of the present utility model, is not limited to the utility model, and for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (8)
1. oil hydraulic cylinder, comprise cylinder barrel (10), be arranged on the sensing unit (12) on described cylinder barrel (10), be separately positioned on rod chamber end cap (20) and the rodless cavity end cap (30) at described cylinder barrel (10) two ends, and be slidably disposed on piston assembly (40) in described cylinder barrel (10), rod chamber end cap (20) inboard of described oil hydraulic cylinder is provided with guide sleeve (21), it is characterized in that, an end that stretches in described cylinder barrel (10) of described guide sleeve (21) is provided with sensing hole (211), be fixedly installed sensing unit installation sleeve (112) on described cylinder barrel (10), described sensing unit installation sleeve (112) is arranged in this sensing hole (211) after passing described cylinder barrel (10), described sensing unit (12) is arranged in described sensing unit installation sleeve (112), described piston assembly (40) comprises piston (43), piston rod (42), and be arranged on described piston (43) or piston rod (42) and the induction pieces (41) that matches with described sensing unit (12), described induction pieces (41) is positioned between described piston (43) and described rod chamber end cap (20).
2. oil hydraulic cylinder according to claim 1, is characterized in that, described induction pieces (41) is for being set in the induction cover on described piston rod (42).
3. oil hydraulic cylinder according to claim 2, is characterized in that, the second portion of described piston rod (42) is Step Shaft, and described induction cover is set on described piston rod (42) between the end face of the step end face of described Step Shaft and described piston (43).
4. oil hydraulic cylinder according to claim 1, is characterized in that, is arranged with elastomer seal (44) and/or metallic packing ring (45) on described piston (43).
5. oil hydraulic cylinder according to claim 4, is characterized in that, described metallic packing ring (45) is a plurality of, along the axially spaced-apart setting of described piston (43).
6. the described oil hydraulic cylinder of any one according to claim 1 to 5, is characterized in that, also is arranged with guide ring (46) on described piston (43).
7. the described oil hydraulic cylinder of any one according to claim 1 to 5, is characterized in that, is provided with seal ring between described sensing unit installation sleeve (112) and described sensing unit (12).
8. a pumping equipment, comprise oil hydraulic cylinder, it is characterized in that, described oil hydraulic cylinder is the described oil hydraulic cylinder of any one in claim 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220612437 CN202926747U (en) | 2012-11-19 | 2012-11-19 | Hydraulic cylinder and pumping device comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220612437 CN202926747U (en) | 2012-11-19 | 2012-11-19 | Hydraulic cylinder and pumping device comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202926747U true CN202926747U (en) | 2013-05-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220612437 Expired - Fee Related CN202926747U (en) | 2012-11-19 | 2012-11-19 | Hydraulic cylinder and pumping device comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202926747U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105170364A (en) * | 2015-08-10 | 2015-12-23 | 王及忠 | Novel cylinder for coating machine |
| CN110067783A (en) * | 2019-05-17 | 2019-07-30 | 徐州徐工液压件有限公司 | A kind of engineering machinery hydraulic cylinder piston structure with two-step throttle pooling feature |
-
2012
- 2012-11-19 CN CN 201220612437 patent/CN202926747U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105170364A (en) * | 2015-08-10 | 2015-12-23 | 王及忠 | Novel cylinder for coating machine |
| CN110067783A (en) * | 2019-05-17 | 2019-07-30 | 徐州徐工液压件有限公司 | A kind of engineering machinery hydraulic cylinder piston structure with two-step throttle pooling feature |
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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: 20130508 Termination date: 20181119 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |