CN203532404U - Hydraulic cylinder - Google Patents
Hydraulic cylinder Download PDFInfo
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- CN203532404U CN203532404U CN201320707699.6U CN201320707699U CN203532404U CN 203532404 U CN203532404 U CN 203532404U CN 201320707699 U CN201320707699 U CN 201320707699U CN 203532404 U CN203532404 U CN 203532404U
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- piston rod
- cylinder barrel
- hydraulic cylinder
- oil
- trough body
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Abstract
The utility model relates to the technical field of hydraulic pressure and discloses a hydraulic cylinder. The hydraulic cylinder comprises a cylinder barrel, a piston rod, and an annular groove body, wherein the piston rod and the inner wall of the cylinder barrel are in sliding seal through a piston, the annular groove body is formed in the cylinder barrel and fixedly sleeves the piston rod, an annular groove is formed in the annular groove body, an opening of the annular groove is formed in the surface of an inner circle of the annular groove body, two side walls of the annular groove and the piston rod are in sealing match so that an oil cavity is formed between the annular groove and the piston rod, the thickness of the two side walls of the annular groove is larger than that of the top wall of the annular groove, an oil guiding hole is formed in the piston rod, the inner end of the oil guiding hole is communicated with the oil cavity, an outer end opening of the oil guiding hole is positioned in the surface of a portion of the piston rod, and the portion of the piston rod extends out of a guide sleeve. The hydraulic cylinder has the advantages of high work stability.
Description
Technical field
The utility model relates to hydraulics field, particularly a kind of oil hydraulic cylinder.
Background technique
Oil hydraulic cylinder is a kind of executive component that larger load is carried out straight reciprocating motion that bears.
When hydraulic system occurs that damaging appears in plant-wide emergency shutdown or hydraulic system; hydraulic system produces braking instruction; operating oil hydraulic cylinder need to carry out emergency braking according to braking instruction; so; need the piston rod of oil hydraulic cylinder to carry out fast braking in the arbitrary position in its travel range, and make it remain on its application position.
Prior art generally adopts mechanical interlock mechanism that the piston rod of oil hydraulic cylinder is held tightly or loosened, and realizes the fast braking of oil hydraulic cylinder and reruns.
Oil hydraulic cylinder as shown in Figure 1 comprises cylinder barrel 5, piston rod 4, is arranged at the opening end mechanical interlock mechanism of cylinder barrel 5, on cylinder barrel 5, be respectively arranged with hydraulic fluid port 2 and hydraulic fluid port 3, during hydraulic fluid port 2 oil-feed, control piston rod 4 to the interior retraction of cylinder barrel 5, during hydraulic fluid port 3 oil-feed, control piston rod 4 interior overhanging from cylinder barrel 5; In spring 6 as shown in Figure 1 of mechanical interlock mechanism, piston 7, ringfeder outer shroud 8, conical surface ringfeder, ring 9, end cap 10 etc. are enclosed within successively in the part that piston rod 4 stretches out cylinder barrel 5 and form, end cap 10 be provided with piston 7 and end cap 10 between the oilhole that is communicated with of gap, the hydraulic fluid port 1 of oilhole is arranged on the side face of end cap 10, and the end cap 10 of mechanical interlock mechanism is fixing with cylinder barrel 5, in conical surface ringfeder, ring 9 is fixing with end cap 10.
Orientation as shown in Figure 1, when needs piston rod 4 rests on a certain position, by the hydraulic oil in 1 pair of piston of hydraulic fluid port 7 of oilhole and the gap of end cap 10, carry out release, piston 7 under the effect of spring 6 to left dislocation, and then promotion ringfeder outer shroud 8 moves to left, due in conical surface ringfeder, encircle 9 and ringfeder outer shroud 8 between there is guide surface, ringfeder outer shroud 8 is oppressed during to left dislocation and in conical surface ringfeder, is encircled 9 and make to encircle in conical surface ringfeder 9 inner side surface and hold piston rod 4 tightly, realizes the locking between cylinder barrel 5 and piston rod 4; When needs piston rod 4 reruns, hydraulic fluid port 1 by oilhole is to oiling in the gap of piston 7 and end cap 10, piston 7 overcomes the elastic force displacement to the right of spring 6 under the pressure-acting of hydraulic oil, and then ringfeder outer shroud 8 is moved to right, ringfeder outer shroud 8 is thrown off with the interior ring 9 of conical surface ringfeder, in conical surface ringfeder, ring 9 unclamps piston rod 4, and piston rod 4 is affranchised.
Above-mentioned oil hydraulic cylinder is by mechanical interlock mechanism, piston rod 4 to be locked the fast braking that realizes piston rod 4 arbitrary position in its travel range, and makes it keep the position after its braking; But, by mechanical interlock mechanism, the surface of piston rod is locked for a long time, will inevitably cause damage to the outer surface of piston rod 4, and then affect the slipper seal between the pilot hole of the guide sleeve that piston rod 4 and cylinder barrel 5 opening ends arrange, cause above-mentioned oil hydraulic cylinder between piston rod 4 and guide sleeve, to produce oil leakage phenomenon in normal using process, reduced the working stability of oil hydraulic cylinder.
Model utility content
The utility model provides a kind of oil hydraulic cylinder, and the working stability of this oil hydraulic cylinder is higher.
For achieving the above object, the utility model provides following technological scheme:
A kind of oil hydraulic cylinder, comprise cylinder barrel, by the piston rod of piston and described inner wall of cylinder slipper seal, also comprise and be positioned at described cylinder barrel and fixed cover is located at the annular trough body on described piston rod, in described annular trough body, there is the circular groove that opening is positioned at described annular trough body internal circular surfaces, between two sidewalls of described circular groove and described piston rod, be sealed and matched, make to form between described circular groove and described piston rod an oil pocket, and the thickness of two sidewalls of described circular groove is all greater than the thickness of roof, in described piston rod, be provided with oil guiding hole, the inner of described oil guiding hole is communicated with described oil pocket, the outer end opening of described oil guiding hole is positioned on the surface that described piston rod stretches out described guide sleeve position.
In above-mentioned oil hydraulic cylinder, in the time of need to carrying out to the piston rod of oil hydraulic cylinder fast braking processing in its travel range, the outer end opening of the oil guiding hole that hydraulic oil is provided with from piston rod injects, and enter in the oil pocket that the outer circumferential face of circular groove and piston rod forms by oil guiding hole, the pressure of hydraulic oil in oil pocket is increased rapidly, the thickness of two sidewalls of the circular groove being provided with due to annular trough body is all greater than the thickness of roof, external diameter swell under the pressure-acting of the hydraulic oil of annular trough body in oil pocket, and then the outer round surface that makes annular trough body is close on the inwall of cylinder barrel, make to lock between annular trough body and cylinder barrel, because annular trough body is fixed on piston rod, finally realize the locking between piston rod and cylinder barrel, and then stop the relative cylinder barrel of piston rod to continue motion, the fast braking of realization to piston rod, while needing piston rod to continue motion, the outer end opening of the oil guiding hole that can be provided with by piston rod carries out pressure release to the high pressure liquid force feed in oil pocket, hydraulic fluid pressure in oil pocket reduces, the external diameter retraction of annular trough body, the outer round surface of annular trough body and the inwall of cylinder barrel depart from, and remove the locking to piston rod.
In above-mentioned oil hydraulic cylinder running, when its piston rod is carried out to fast braking, be to realize by coordinating between the outer round surface of annular trough body and the inwall of cylinder barrel, to not causing damage to the outer round surface of piston rod in the fast braking process of piston rod, and then can not affect the slipper seal between the outer round surface of piston rod and the inwall of the pilot hole of guide sleeve.
So the novel oil hydraulic cylinder providing of this use has higher working stability.
Preferably, the braking force while coordinating between the outer round surface of annular trough body and the inwall of cylinder barrel for improving, and the damage to inner wall of cylinder when reducing annular trough body and coordinating with inner wall of cylinder, the outer round surface of described annular trough body is provided with copper layer.
Preferably, described annular trough body has opening and is positioned at the caulking groove on described annular trough body outer round surface, and described copper layer is embedded in described caulking groove.
Preferably, the damage to inner wall of cylinder while coordinating with inner wall of cylinder in order further to reduce annular trough body, the inner wall surface of described cylinder barrel is provided with hard chromium layers.
Preferably, described oil guiding hole comprises:
The blind hole of extending along the central axis of described piston rod, the opening of described blind hole is positioned at described piston rod exterior edge face;
The oilhole that at least one one end is communicated with described oil pocket, the other end is communicated with described blind hole, the central axis of described oilhole is vertical with the central axis of described piston rod.
Preferably, for improving the stability being fixedly connected with between annular trough body and piston rod, the opening end that described cylinder barrel stretches out for described piston rod is provided with guide sleeve, the one side that described piston deviates from described guide sleeve towards end face and the described annular trough body of described guide sleeve offsets, described piston rod have one with described piston towards the relative confined planes of the end face of described guide sleeve, the one side that the sidewall that described circular groove and described piston offset deviates from described piston forms a card face, and described card face and described confined planes offset.
Preferably, between two of described circular groove bottom surfaces of sidewall and the outer round surface of described piston rod, by seal ring, be sealed and matched.
Preferably, an end opening of described cylinder barrel, described piston rod is one.
Preferably, the both ends open of described cylinder barrel, and described cylinder barrel both ends open place is equipped with guide sleeve, described piston rod is two, and stretch out from one end of described cylinder barrel the outer end of a piston rod, stretch out from the other end of described cylinder barrel the outer end of another piston rod, and described in each, piston rod is all arranged with a described annular trough body.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of oil hydraulic cylinder in prior art;
The sectional structure schematic diagram of the oil hydraulic cylinder that Fig. 2 provides for the utility model embodiment;
Annular trough body and piston rod and piston package assembly exploded perspective view in the oil hydraulic cylinder that Fig. 3 provides for the utility model embodiment.
Description of reference numerals
1,2,3, hydraulic fluid port 4,13, piston rod
5,16, cylinder barrel 6, spring
7,11, piston 111, piston 11 is towards the end face of piston rod 13 outer ends
8, ringfeder outer shroud 9, ring in ringfeder
10, end cap 12, guide sleeve
14, annular trough body 15, copper layer
131, oil guiding hole 132, confined planes
141, circular groove 142, seal ring
143, card face
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technological scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiments.Embodiment based in the utility model, those of ordinary skills are not making the every other embodiment who obtains under creative work prerequisite, all belong to the scope of the utility model protection.
Please refer to Fig. 2, the sectional structure schematic diagram of the oil hydraulic cylinder that Fig. 2 provides for the utility model embodiment.
The oil hydraulic cylinder that the utility model embodiment provides, comprises cylinder barrel 16, the piston rod 13 by piston 11 with cylinder barrel 16 inwall slipper seals, above-mentioned oil hydraulic cylinder also comprises and is positioned at the annular trough body 14 that cylinder barrel 16 and fixed cover are located at piston rod 13, annular trough body 14 has the circular groove 141 that opening is positioned at annular trough body 14 internal circular surfaces, , between two sidewalls of circular groove 141 and piston rod 13, be sealed and matched, make to form between circular groove 141 and piston rod 13 oil pocket, and the thickness of two sidewalls of circular groove 141 is all greater than the thickness of roof, in piston rod 13, there is oil guiding hole 131, the inner of oil guiding hole 131 is communicated with oil pocket, the outer end opening of oil guiding hole 131 is positioned on the surface that piston rod 13 stretches out guide sleeve 12 positions.
In above-mentioned oil hydraulic cylinder, in the time of need to carrying out fast braking processing in its travel range to the piston rod 13 of oil hydraulic cylinder, the outer end opening of the oil guiding hole 131 that hydraulic oil has from piston rod 13 injects, and enter in the oil pocket that the outer circumferential face of circular groove 141 and piston rod 13 forms by oil guiding hole 131, the pressure of hydraulic oil in oil pocket is increased rapidly, the thickness of two sidewalls of the circular groove 141 having due to annular trough body 14 is all greater than the thickness of roof, external diameter swell under the pressure-acting of the hydraulic oil of annular trough body 14 in oil pocket, and then the outer round surface that makes annular trough body 14 is close on the inwall of cylinder barrel 16, make locking between annular trough body 14 and cylinder barrel 16, because annular trough body 14 is sheathed on piston rod 13, finally realize the locking between piston rod 13 and cylinder barrel 16, and then stop the relative cylinder barrel 16 of piston rod 13 to continue motion, the fast braking of realization to piston rod 13, while needing piston rod 13 to continue motion, the outer end opening of the oil guiding hole 131 that can be provided with by piston rod 13 carries out pressure release to the high pressure liquid force feed in oil pocket, hydraulic fluid pressure in oil pocket reduces, the external diameter retraction of annular trough body 14, the inwall of the outer round surface of annular trough body 14 and cylinder barrel 16 departs from, and removes the locking to piston rod 13.
In above-mentioned oil hydraulic cylinder running, when its piston rod 13 is carried out to fast braking, be to realize by coordinating between the outer round surface of annular trough body 14 and the inwall of cylinder barrel 16, to not causing damage to the outer round surface of piston rod 13 in the fast braking process of piston rod 13, and then can not affect the slipper seal between the outer round surface of piston rod 13 and the inwall of the pilot hole of guide sleeve 12.
So the novel oil hydraulic cylinder providing of this use has higher working stability.
In a kind of optional mode of execution, braking force while coordinating between the outer round surface of annular trough body 14 and the inwall of cylinder barrel 16 for improving, and the damage to cylinder barrel 16 inwalls when reducing annular trough body 14 and coordinating with cylinder barrel 16 inwalls, the outer round surface of annular trough body 14 is provided with copper layer 15.
In a kind of preferred implementation, can the caulking groove on the outer round surface that opening is positioned at annular trough body 14 be set at annular trough body 14, and then copper layer 15 be embedded in the caulking groove on the outer round surface of annular trough body 14.
Certainly, the damage to cylinder barrel 16 inwalls while coordinating with the inwall of cylinder barrel 16 in order further to reduce annular trough body 14, the inner wall surface of cylinder barrel 16 can also be provided with hard chromium layers.Certainly hard chromium layers can be coating.
Please continue to refer to Fig. 2, in a kind of preferred implementation, for ease of the oil guiding hole 131 that piston rod 13 is had, to process, the oil guiding hole 131 that above-mentioned piston rod 13 arranges can comprise:
The blind hole of extending along the central axis of piston rod 13, the opening of blind hole is positioned at the exterior edge face of piston rod 13;
The oilhole that at least one one end is communicated with oil pocket, the other end is communicated with blind hole, the central axis of oilhole is vertical with the central axis of piston rod 13.
Certainly, above-mentioned oilhole can be for a plurality of, and preferably along the cross section place circumferential surface of piston rod 13, are uniformly distributed, and are convenient to make the pressure of hydraulic oil in oil pocket to change more even.
Incorporated by reference to Fig. 2 with reference to figure 3, for improving the stability being fixedly connected with between annular trough body 14 and piston rod 13, the opening end that cylinder barrel 16 stretches out for piston rod 13 is provided with guide sleeve 12, piston 11 offsets with the one side that annular trough body 14 deviates from guide sleeve 12 towards the end face 111 of guide sleeve 12, piston rod 13 have one with piston 11 towards the relative confined planes 132 of the end face 111 of guide sleeve 12, the one side that the sidewall that circular groove 141 and piston 11 offset deviates from piston 11 forms a card face 143, and card face 143 offsets with confined planes 132.
Please continue to refer to Fig. 2, for guaranteeing to form between the circular groove 141 of annular trough body 14 and the outer round surface of piston rod 13 sealing of oil pocket, preferably, between the bottom surface of 141 two sidewalls of circular groove and the outer circumferential face of piston rod 13, by seal ring 142, be sealed and matched.
Certainly, two sidewalls of circular groove 141 can also be sealed and matched with the outer round surface of piston rod 13 by other means, repeat no more here.
The oil hydraulic cylinder that the utility model embodiment provides, can be single-piston rod one-way hydraulic cylinder, preferably, an end opening of cylinder barrel 16, piston rod 13 is also one.
The oil hydraulic cylinder that the utility model embodiment provides, it can also be the two-way hydraulic cylinder of double-piston double piston-rod, preferably, the equal opening in two ends of cylinder barrel 16, and cylinder barrel 16 both ends open places are equipped with guide sleeve, and the piston rod that oil hydraulic cylinder has is two, and the external end head of a piston rod stretches out from one end of cylinder barrel, the external end head of another piston rod stretches out from the other end of cylinder barrel, and each piston rod is all arranged with an annular trough body.Each piston rod can be braked or move according to the locking relation between the annular trough body of its setting and cylinder barrel.
Certainly, the oil hydraulic cylinder that the utility model embodiment provides, can also be the two-way hydraulic cylinder of single piston double piston-rod, and its concrete structure repeats no more here.
Obviously, those skilled in the art can carry out various changes and modification and not depart from spirit and scope of the present utility model the utility model embodiment.Like this, if within of the present utility model these are revised and modification belongs to the scope of the utility model claim and equivalent technologies thereof, the utility model is also intended to comprise these changes and modification interior.
Claims (9)
1. an oil hydraulic cylinder, comprise cylinder barrel, by the piston rod of piston and described inner wall of cylinder slipper seal, it is characterized in that, also comprise and be positioned at described cylinder barrel and fixed cover is located at the annular trough body on described piston rod, in described annular trough body, there is the circular groove that opening is positioned at described annular trough body internal circular surfaces, between two sidewalls of described circular groove and described piston rod, be sealed and matched, make to form between described circular groove and described piston rod an oil pocket, and the thickness of two sidewalls of described circular groove is all greater than the thickness of roof, in described piston rod, be provided with oil guiding hole, the inner of described oil guiding hole is communicated with described oil pocket, the outer end opening of described oil guiding hole is positioned on the surface that described piston rod stretches out described guide sleeve position.
2. oil hydraulic cylinder according to claim 1, is characterized in that, the outer round surface of described annular trough body is provided with copper layer.
3. oil hydraulic cylinder according to claim 2, is characterized in that, described annular trough body has opening and is positioned at the caulking groove on described annular trough body outer round surface, and described copper layer is embedded in described caulking groove.
4. oil hydraulic cylinder according to claim 2, is characterized in that, the inner wall surface of described cylinder barrel is provided with hard chromium layers.
5. oil hydraulic cylinder according to claim 1, is characterized in that, described oil guiding hole comprises:
The blind hole of extending along the central axis of described piston rod, the opening of described blind hole is positioned at described piston rod exterior edge face;
The oilhole that at least one one end is communicated with described oil pocket, the other end is communicated with described blind hole, the central axis of described oilhole is vertical with the central axis of described piston rod.
6. oil hydraulic cylinder according to claim 1, it is characterized in that, the opening end that described cylinder barrel stretches out for described piston rod is provided with guide sleeve, the one side that described piston deviates from described guide sleeve towards end face and the described annular trough body of described guide sleeve offsets, described piston rod have one with described piston towards the relative confined planes of the end face of described guide sleeve, the one side that the sidewall that described circular groove and described piston offset deviates from described piston forms a card face, and described card face and described confined planes offset.
7. oil hydraulic cylinder according to claim 6, is characterized in that, between the bottom surface of two sidewalls of described circular groove and the outer round surface of described piston rod, by seal ring, is sealed and matched.
8. according to the oil hydraulic cylinder described in claim 1～7 any one, it is characterized in that, an end opening of described cylinder barrel, described piston rod is one.
9. according to the oil hydraulic cylinder described in claim 1～7 any one, it is characterized in that, the both ends open of described cylinder barrel, and described cylinder barrel both ends open place is equipped with guide sleeve, described piston rod is two, and stretch out from an end opening of described cylinder barrel the outer end of a piston rod, stretch out from the other end opening of described cylinder barrel the outer end of another piston rod, and described in each, piston rod is all arranged with a described annular trough body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320707699.6U CN203532404U (en) | 2013-11-11 | 2013-11-11 | Hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320707699.6U CN203532404U (en) | 2013-11-11 | 2013-11-11 | Hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203532404U true CN203532404U (en) | 2014-04-09 |
Family
ID=50418617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320707699.6U Expired - Fee Related CN203532404U (en) | 2013-11-11 | 2013-11-11 | Hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203532404U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113404737A (en) * | 2021-05-24 | 2021-09-17 | 中联重科股份有限公司 | Hydraulic cylinder and hoisting device |
-
2013
- 2013-11-11 CN CN201320707699.6U patent/CN203532404U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113404737A (en) * | 2021-05-24 | 2021-09-17 | 中联重科股份有限公司 | Hydraulic cylinder and hoisting device |
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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: 20140409 Termination date: 20151111 |