CN203161708U - Buffering hydraulic oil cylinder - Google Patents
Buffering hydraulic oil cylinder Download PDFInfo
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- CN203161708U CN203161708U CN 201320030343 CN201320030343U CN203161708U CN 203161708 U CN203161708 U CN 203161708U CN 201320030343 CN201320030343 CN 201320030343 CN 201320030343 U CN201320030343 U CN 201320030343U CN 203161708 U CN203161708 U CN 203161708U
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Abstract
The utility model discloses a buffering hydraulic oil cylinder. The buffering hydraulic oil cylinder comprises a cylinder barrel, a piston and a piston rod. The piston rod is connected with the piston, the piston is installed in the cylinder barrel, a first oil inlet and outlet which is communicated with a non-rod chamber is formed in the outer wall of the cylinder barrel, a first throttling channel is arranged on the piston, the first throttling channel is communicated with the non-rod chamber, and when the piston seals the first oil inlet and outlet, the first oil inlet and outlet is communicated with the non-rod chamber through the first throttling channel. According to the buffering hydraulic oil cylinder, the buffering effect can be reliably achieved under large-load and high-frequency working conditions, and the service life of the buffering hydraulic oil cylinder is longer. The buffering hydraulic oil cylinder is low in the requirement for manufacturing accuracy, short in length of the buffering hydraulic oil cylinder, and can achieve three buffering stages.
Description
Technical field
The utility model relates to engineering machinery field, particularly a kind of buffering hydraulic oil cylinder.
Background technique
Hydraulic jack is widely used parts in the engineering machinery, and in its working procedure, piston needs continuous to-and-fro motion.When piston rod reached limit position, piston end surface can produce very big impact to end cap, might cause the damage of hydraulic jack.For this reason, need damping device be set at this position, avoid above-mentioned percussion to the damage of hydraulic jack.
Existing damping device is different according to hydraulic jack application and size, has very big difference.Small-sized oil cylinder can directly adopt stage clip as damping device, still, and for the hydraulic jack of big cylinder diameter, big stroke, if adopt stage clip as damping device, the enough springs of elasticity will be difficult to obtain, and because its pressure is very big, spring will soon damage owing to compressing repeatedly.Therefore, the hydraulic jack for big cylinder diameter, big stroke adopts hydraulic cushion mechanism shown in Figure 1 usually.
Please referring to Fig. 1, this illustrates, and described damping device is included in the minibuffer ring of installing on additional section middle annular groove of offering of piston rod 06 and the minibuffer cover 04 that is enclosed within the additional section of piston rod; Corresponding minibuffer cover 04 at the lid oral area of the rodless cavity end cap 01 of oil cylinder, arranges the buffering endoporus 07 that the external diameter of internal diameter and described minibuffer cover 04 matches.When described piston rod was withdrawn, described minibuffer cover 04 at first inserted in the described buffering endoporus 07, makes the oil return circuit of rodless cavity in the cylinder barrel 02 blocked, meanwhile, and the gap formation throttling oil duct between minibuffer cover 04 and the buffering endoporus 07; Like this, piston 05 can continue to be subjected to throttling oil duct damping function simultaneously to the retracted orientation motion, and its movement velocity descends.And, piston 05 from piston rod 03 withdrawal final position more close to, the throttling oil duct between minibuffer cover 04 and the buffering endoporus 07 is more long, the damping of throttling oil duct is more big, the motion of piston 05 is more slow, up to finally arriving piston rod 03 retraction movement final position stably.
Above-mentioned damping mechanism is widely used in the hydraulic jack of big cylinder diameter, big stroke, for hydraulic jack provides buffer protection preferably at present.
But also there is obvious defects in above-mentioned damping mechanism.At first, in above-mentioned big cylinder diameter, big stroke hydraulic oil cylinder, hydraulic jack often is operated under big load, the high-frequency operating conditions.For example, the driving oil cylinder of the occasions such as digging arm driving of excavator use.At this moment, the minibuffer cover 04 in the above-mentioned damping mechanism need insert described buffering endoporus 07 repeatedly with high speed, and matching gap between the two is original just very little, and piston rod 03 is very heavy, and it is easily to lopsidedness under the effect of gravity; Therefore, the hydraulic jack that above-mentioned occasion is used is easy to occur minibuffer cover 04 can't insert the damping mechanism fault that cushions in the endoporus 07, causes whole hydraulic jack normally not use.
Another key issue of above-mentioned damping mechanism is that the outside dimension of minibuffer cover 04 must accurately cooperate with the internal diameter size of described buffering endoporus 07, otherwise just can't realize buffer function; It is high that this just causes the accuracy of manufacturing of this damping mechanism to require, and the manufacture level of general producer is difficult to reach.This kind damping mechanism buffer shock-absorbing effect is relatively poor simultaneously, and has lengthened the length of hydraulic jack.
The model utility content
In view of this, the utility model proposes a kind of buffering hydraulic oil cylinder, this buffering hydraulic oil cylinder can realize having longer working life by cushioning effect reliably under big load, high-frequency operating mode.And the accuracy of manufacturing of this buffering hydraulic oil cylinder requires low, and buffering hydraulic oil cylinder length is short.
On the one hand, the utility model provides a kind of buffering hydraulic oil cylinder, comprise cylinder barrel and piston and piston rod, piston rod is connected with piston, and piston is installed in the cylinder barrel, and the outer wall of cylinder barrel is provided with first oil inlet and outlet that communicates with rodless cavity, piston is provided with the first throttle passage, the first throttle passage communicates with rodless cavity, and when piston closes first oil inlet and outlet, first oil inlet and outlet communicates with rodless cavity by the first throttle passage.
Further, the first throttle passage comprises first oilhole and second oilhole, and first oilhole is arranged on the excircle of piston, and second oilhole is arranged on the piston end face, and first oilhole communicates with second oilhole, and second oilhole communicates with rodless cavity.
Further, the first throttle passage also comprises first annular diversion trench, and first annular diversion trench is arranged on the outer circumferential face of piston, and first oilhole communicates with first annular diversion trench.
Further, comprise four first oilholes at least, and be evenly arranged on the outer circumferential face of piston that the second oilhole diameter is greater than the first oilhole diameter.
Further, also be provided with second oil inlet and outlet that communicates with rod chamber on the outer wall of cylinder barrel, also be provided with second throttling passage on the piston, second throttling passage communicates with rod chamber, when piston closes second oil inlet and outlet, second oil inlet and outlet communicates with rod chamber by second throttling passage.
Further, second throttling passage comprises the 3rd oilhole and the 4th oilhole, and the 3rd oilhole is arranged on the excircle of piston, and the 4th oilhole is arranged on the piston end face, and the 3rd oilhole communicates with the 4th oilhole, and the 4th oilhole communicates with rod chamber.
Further, second throttling passage also comprises second annular diversion trench, and second annular diversion trench is arranged on the outer circumferential face of piston, and the 3rd oilhole communicates with second annular diversion trench.
Further, comprise four the 3rd oilholes at least, and be evenly arranged on the outer circumferential face of piston; At least comprise four the 4th oilholes, and be evenly arranged on the piston end face.
A kind of buffering hydraulic oil cylinder also is provided on the other hand, comprise cylinder barrel and piston and piston rod, piston rod is connected with piston, piston is installed in the cylinder barrel, the outer wall of cylinder barrel is provided with second oil inlet and outlet that communicates with rod chamber, and piston is provided with second throttling passage, and second throttling passage communicates with rod chamber, when piston closes second oil inlet and outlet, second oil inlet and outlet communicates with rod chamber by second throttling passage.
Further, second throttling passage comprises the 3rd oilhole and the 4th oilhole, and the 3rd oilhole is arranged on the excircle of piston, and the 4th oilhole is arranged on the piston end face, and the 3rd oilhole communicates with the 4th oilhole, and the 4th oilhole communicates with rod chamber.
Further, second throttling passage also comprises second annular diversion trench, and second annular diversion trench is arranged on the outer circumferential face of piston, and the 3rd oilhole communicates with second annular diversion trench.
Further, comprise four the 3rd oilholes at least, and be evenly arranged on the outer circumferential face of piston; At least comprise four the 4th oilholes, and be evenly arranged on the piston end face.
The buffering hydraulic oil cylinder that the utility model provides can realize having longer working life by cushioning effect reliably under big load, high-frequency operating mode.And the accuracy of manufacturing of this buffering hydraulic oil cylinder requires low, and buffering hydraulic oil cylinder length is short.
Description of drawings
The accompanying drawing that constitutes 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 constitute improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is correlation technique buffering hydraulic oil cylinder structural representation;
Fig. 2 is first kind of buffering hydraulic oil cylinder structural representation of the utility model;
Fig. 3 is second kind of buffering hydraulic oil cylinder structural representation of the utility model;
Fig. 4 is the A-A view of Fig. 3;
Fig. 5 is the B-B view of Fig. 3.
Embodiment
Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment in the utility model can make up mutually.Describe the utility model below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
As shown in Figure 2, a kind of buffering hydraulic oil cylinder comprises cylinder barrel 1 and piston 2 and piston rod 3, and piston rod 3 is connected with piston 2, piston 2 is installed in the cylinder barrel 1, and the outer wall of cylinder barrel 1 is provided with first oil inlet and outlet 10 that communicates with rodless cavity and second oil inlet and outlet 11 that communicates with rod chamber.
Piston 2 is provided with first throttle passage 20, and first throttle passage 20 communicates with rodless cavity.First throttle passage 20 comprises that first oilhole 200 and second oilhole, 201, the first oilholes 200 are arranged on the periphery of piston 2, and second oilhole 201 is arranged on the end face of piston 2, and first oilhole 200 communicates with second oilhole 201, and second oilhole 201 communicates with rodless cavity.First oilhole, 200 diameters are less than second oilhole, 201 diameters.First oilhole, 200 diameter determine the throttling size, just determine the turnover oil pressure.The influence of second oilhole, 201 diameter starts the active area of hydraulic oil, just determines the buffering hydraulic oil cylinder rodless cavity to start the size of active force.First oilhole 200 determines the cushioning effect of buffering hydraulic oil cylinder from the distance of piston 2 end faces.Second oilhole, 201 diameters and first oilhole, 200 diameters reach the distance from piston 2 end faces, can design according to actual needs.
Buffering hydraulic oil cylinder rodless cavity buffering working procedure is as follows, starts the original state of buffering at rodless cavity, after first oil inlet and outlet 10 of pressure oil by cylinder barrel 1 enters, enters rodless cavity through first oilhole 200 and second oilhole 201.Piston 2 is fitted with the end cap of cylinder barrel 1 during again owing to startup, and the active area of pressure oil only is the sectional area of second oilhole 201, and the secondary action area is also less.So the startup thrust when oil cylinder starts is also less, reduced to start and impacted, this is the phase I buffering.
After the buffering hydraulic oil cylinder rodless cavity had started, hydraulic oil still entered rodless cavity by first oilhole 200 and second oilhole 201.Because this moment, piston 2 disengaged with the end cap of cylinder barrel 1, the active area of hydraulic oil becomes the sectional area of cylinder barrel 1 by the sectional area of second oilhole 201, and active area increases, and piston 2 is stressed also to be increased, and this cushions for second stage.
Piston 2 continues mobile, and piston rod 3 continues to stretch out, and the end face of piston 2 begins to contact with first oil inlet and outlet 10 of cylinder barrel 1.Hydraulic oil not only enters rodless cavity by first oilhole 200 and second oilhole 201, also enters rodless cavity by first oil inlet and outlet 10, and the oil-feed flow pressure increases, and thrust also increases, and this is the phase III buffering.
Piston 2 continues mobile, and piston 2 end faces contact aperture to be continued to increase with first oil inlet and outlet 10 of cylinder barrel 1, and oil-feed flow and pressure continue to increase, and stressed also the continuing of piston 2 increases.This process piston 2 is subjected to a power that increases continuously, and piston 2 does not impact.When piston 2 leaves first oil inlet and outlet 10 of cylinder barrel 1 fully, buffering hydraulic oil cylinder is in normal flow rate and pressure, and the operation phase of normal area of contact, buffering hydraulic oil cylinder is finished buffer starting.
The rodless cavity of buffering hydraulic oil cylinder is the inverse process that above-mentioned rodless cavity starts buffering to bit buffering basically.Rodless cavity is to the initial state of bit buffering.Piston 2 contacts with first oil inlet and outlet 10, and rodless cavity oil return outlet is more and more littler, and the rodless cavity oil return begins throttling and builds the pressure, and the pressure that builds the pressure increases gradually.Piston 2 is subjected to the resistance opposite with traffic direction, and this resistance also becomes big gradually, and piston 2 reduces speed now, and this is the phase I deceleration buffer.
Piston 2 continues mobile, piston rod 3 continues to regain, when piston 2 sealings first oil inlet and outlet 10 directly communicates with rodless cavity, the rodless cavity oil return can only be all from first oilhole 200 and 201 oil returns of second oilhole, restriction effect is further strengthened, the rodless cavity pressure that builds the pressure further improves, and piston 2 running resistances further strengthen, and this is the second stage buffering.
Piston 2 continues mobile, piston rod 3 continues to regain, the gap of piston 2 end faces and cylinder barrel 1 end cap is more and more littler, rodless cavity part hydraulic oil must be by this gap again through first oilhole 200 and 201 oil returns of second oilhole, when the gap is very little, throttling builds the pressure can be bigger, so piston 2 also can be subjected to bigger resistance, this for the phase III to bit buffering.Piston 2 puts in place, and buffering is finished.
In order to make in the buffering hydraulic oil cylinder round trip, all have cushioning effect, also be provided with second throttling passage, 21, the second throttling passages 21 on the piston 2 and communicate with rod chamber.Second throttling passage 21 comprises the 3rd oilhole 210 and the 4th oilhole 211, the 3rd oilhole 210 is arranged on the outer circumferential face of piston 2, the 4th oilhole 211 is arranged on the other end of piston 2, and the 3rd oilhole 210 communicates with the 4th oilhole 211, and the 4th oilhole 211 communicates with rod chamber.When piston 2 sealings second oil inlet and outlet 11 directly communicated with rod chamber, second oil inlet and outlet 11 communicated with rod chamber by second throttling passage 21.The startup of buffering hydraulic oil cylinder rod chamber and the consistent of cushioning principle and buffering hydraulic oil cylinder rodless cavity that put in place, here no longer tool is stated.
Extremely shown in Figure 5 as Fig. 3, second kind of specific embodiment of buffering hydraulic oil cylinder, be different with buffering hydraulic oil cylinder shown in Figure 2: first throttle passage 20 comprises first oilhole 200, second oilhole 201, first annular diversion trench 202, first oilhole 200 is arranged on the excircle of piston 2, first oilhole 200 comprises 4 at least, and is evenly arranged on the outer circumferential face of piston 2.Second oilhole 201 is arranged on the end face of piston 2, and first oilhole 200 communicates with second oilhole 201, and second oilhole 201 communicates with rodless cavity.First oilhole, 200 diameters are less than second oilhole, 201 diameters.First annular diversion trench 202 is arranged on the outer circumferential face of piston 2, and first oilhole 200 communicates with first annular diversion trench 202.
For piston 2 rotatable buffering hydraulic oil cylinders, piston 2 rotation may make that first oilhole 200 and first oil inlet and outlet 10 do not line up the problem that causes first oil inlet and outlet 10 and first throttle passage 20 not to communicate on the piston 2.Outer circumferential face at piston 2 arranges first annular diversion trench 202, thereby has solved this problem, no matter what position piston 2 is in, first oil inlet and outlet 10 can communicate with rodless cavity by first annular diversion trench 202, first oilhole 200, second oilhole 201.First annular diversion trench 202 has solved piston 2 rotatable buffering hydraulic oil cylinders, and first oil inlet and outlet 10 does not communicate with first throttle passage 20, causes the not smooth problem of oil circuit.First oilhole 200 can be any amount, as 6,8,10 etc.First oilhole 200 is evenly arranged a plurality of dynamic and static equilibriums of piston 2 in the to-and-fro motion process that are conducive to, prevent piston 2 unbalance stress, cause piston 2 to tilt, with problems such as cylinder barrel 1 poor sealing, the seal arrangement of piston 2 and piston 2, cylinder barrel 1 excessive wears.
For the rod chamber buffering, second throttling passage 21 comprises the 3rd oilhole 210 and the 4th oilhole 211, second annular diversion trench 212, the 3rd oilhole 210 is arranged on the excircle of piston 2, and the 3rd oilhole 210 comprises 4 at least, and is evenly arranged on the excircle of piston 2.The 4th oilhole 211 is arranged on the other end of piston 2.The 3rd oilhole 210 communicates with the 4th oilhole 211, and the 4th oilhole 211 communicates with rod chamber.When piston 2 sealings second oil inlet and outlet 11 directly communicated with rod chamber, second oil inlet and outlet 11 communicated with rod chamber by second throttling passage 21.The 4th oilhole 211 comprises 4 at least, and is evenly arranged in centered by piston 2 on the other end of piston 2.Second annular diversion trench 212 is arranged on the outer circumferential face of piston 2, and the 3rd oilhole 210 communicates with second annular diversion trench 212.
For piston 2 rotatable buffering hydraulic oil cylinders, piston 2 rotation may make that the 3rd oilhole 210 and second oil inlet and outlet 11 do not line up the problem that causes second oil inlet and outlet 11 and second throttling passage 21 not to communicate on the piston 2.Outer circumferential face at piston 2 arranges second annular diversion trench 212, thereby has solved this problem, no matter what position piston 2 is in, second oil inlet and outlet 11 can communicate with rod chamber by second annular diversion trench 212, the 3rd oilhole 210, the 4th oilhole 211.Second annular diversion trench 212 has solved piston 2 rotatable buffering hydraulic oil cylinders, and second oil inlet and outlet 11 does not communicate with second throttling passage 21, causes the not smooth problem of oil circuit.The 3rd oilhole 210 and the 4th oilhole 211 can be any amount, as 6,8,10 etc.The 3rd oilhole 210 and the 4th oilhole 211 are evenly arranged a plurality of dynamic and static equilibriums of piston 2 in the to-and-fro motion process that are conducive to, prevent piston 2 unbalance stress, cause piston 2 to tilt, with problems such as cylinder barrel 1 poor sealing, the seal arrangement of piston 2 and piston 2, cylinder barrel 1 excessive wears.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (12)
1. buffering hydraulic oil cylinder, comprise cylinder barrel (1) and piston (2) and piston rod (3), piston rod (3) is connected with piston (2), piston (2) is installed in the cylinder barrel (1), the outer wall of cylinder barrel (1) is provided with first oil inlet and outlet (10) that communicates with rodless cavity, it is characterized in that, piston (2) is provided with first throttle passage (20), first throttle passage (20) communicates with rodless cavity, when piston (2) sealing first oil inlet and outlet (10), first oil inlet and outlet (10) communicates with rodless cavity by first throttle passage (20).
2. buffering hydraulic oil cylinder according to claim 1, it is characterized in that, first throttle passage (20) comprises first oilhole (200) and second oilhole (201), first oilhole (200) is arranged on the excircle of piston (2), second oilhole (201) is arranged on the end face of piston (2), first oilhole (200) communicates with second oilhole (201), and second oilhole (201) communicates with rodless cavity.
3. buffering hydraulic oil cylinder according to claim 2, it is characterized in that, first throttle passage (20) also comprises first annular diversion trench (202), first annular diversion trench (202) is arranged on the outer circumferential face of piston (2), and first oilhole (200) communicates with first annular diversion trench (202).
4. buffering hydraulic oil cylinder according to claim 3 is characterized in that, comprises four first oilholes (200) at least, and is evenly arranged on the outer circumferential face of piston (2), and second oilhole (201) diameter is greater than first oilhole (200) diameter.
5. buffering hydraulic oil cylinder according to claim 1, it is characterized in that, also be provided with second oil inlet and outlet (11) that communicates with rod chamber on the outer wall of cylinder barrel (1), also be provided with second throttling passage (21) on the piston (2), second throttling passage (21) communicates with rod chamber, when piston (2) sealing second oil inlet and outlet (11), second oil inlet and outlet (11) communicates with rod chamber by second throttling passage (21).
6. buffering hydraulic oil cylinder according to claim 5, it is characterized in that, second throttling passage (21) comprises the 3rd oilhole (210) and the 4th oilhole (211), the 3rd oilhole (210) is arranged on the excircle of piston (2), the 4th oilhole (211) is arranged on the end face of piston (2), the 3rd oilhole (210) communicates with the 4th oilhole (211), and the 4th oilhole (211) communicates with rod chamber.
7. buffering hydraulic oil cylinder according to claim 6, it is characterized in that, second throttling passage (21) also comprises second annular diversion trench (212), second annular diversion trench (212) is arranged on the outer circumferential face of piston (2), and the 3rd oilhole (210) communicates with second annular diversion trench (212).
8. buffering hydraulic oil cylinder according to claim 6 is characterized in that, comprises four the 3rd oilholes (210) at least, and is evenly arranged on the outer circumferential face of piston (2); At least comprise four the 4th oilholes (211), and be evenly arranged on the end face of piston (2).
9. buffering hydraulic oil cylinder, comprise cylinder barrel (1) and piston (2) and piston rod (3), piston rod (3) is connected with piston (2), piston (2) is installed in the cylinder barrel (1), the outer wall of cylinder barrel (1) is provided with second oil inlet and outlet (11) that communicates with rod chamber, it is characterized in that, piston (2) is provided with second throttling passage (21), second throttling passage (21) communicates with rod chamber, when piston (2) sealing second oil inlet and outlet (11), second oil inlet and outlet (11) communicates with rod chamber by second throttling passage (21).
10. buffering hydraulic oil cylinder according to claim 9, it is characterized in that, second throttling passage (21) comprises the 3rd oilhole (210) and the 4th oilhole (211), the 3rd oilhole (210) is arranged on the excircle of piston (2), the 4th oilhole (211) is arranged on the end face of piston (2), the 3rd oilhole (210) communicates with the 4th oilhole (211), and the 4th oilhole (211) communicates with rod chamber.
11. buffering hydraulic oil cylinder according to claim 10, it is characterized in that, second throttling passage (21) also comprises second annular diversion trench (212), second annular diversion trench (212) is arranged on the outer circumferential face of piston (2), and the 3rd oilhole (210) communicates with second annular diversion trench (212).
12. buffering hydraulic oil cylinder according to claim 10 is characterized in that, comprises four the 3rd oilholes (210) at least, and is evenly arranged on the outer circumferential face of piston (2); At least comprise four the 4th oilholes (211), and be evenly arranged on the end face of piston (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320030343 CN203161708U (en) | 2013-01-21 | 2013-01-21 | Buffering hydraulic oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320030343 CN203161708U (en) | 2013-01-21 | 2013-01-21 | Buffering hydraulic oil cylinder |
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| Publication Number | Publication Date |
|---|---|
| CN203161708U true CN203161708U (en) | 2013-08-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320030343 Expired - Fee Related CN203161708U (en) | 2013-01-21 | 2013-01-21 | Buffering hydraulic oil cylinder |
Country Status (1)
| Country | Link |
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| CN (1) | CN203161708U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104389849A (en) * | 2014-10-13 | 2015-03-04 | 中国运载火箭技术研究院 | Buffer actuation device suitable for gas actuation |
| CN104833299A (en) * | 2014-02-07 | 2015-08-12 | 赫尔穆特费希尔有限责任公司电子及测量技术研究所 | Method for electrically controlling a gauge stand and gauge stand for holding a measurement gauge |
| CN108757626A (en) * | 2018-05-30 | 2018-11-06 | 徐州永佳液压设备有限公司 | Low voltage starting buffer type hydraulic oil cylinder |
| CN108799252A (en) * | 2018-08-06 | 2018-11-13 | 山西航天清华装备有限责任公司 | The adjustable hydraulic cylinder of bidirectional buffering speed |
| CN112566824A (en) * | 2020-05-13 | 2021-03-26 | 华为技术有限公司 | Hydraulic adjusting device, hydraulic adjusting system, braking system and control method |
| CN112983924A (en) * | 2019-12-18 | 2021-06-18 | 比亚迪股份有限公司 | Plunger cylinder and vehicle |
| CN114738350A (en) * | 2022-06-10 | 2022-07-12 | 迪非液压科技江苏有限公司 | High-pressure large-flow hydraulic equipment of self-adaptation buffering |
| CN114962388A (en) * | 2022-07-29 | 2022-08-30 | 江苏恒立液压股份有限公司 | Buffer piston and oil cylinder with same |
| CN115234541A (en) * | 2022-07-15 | 2022-10-25 | 湖南金源柯重工科技有限公司 | Hydraulic cylinder with high buffer performance |
-
2013
- 2013-01-21 CN CN 201320030343 patent/CN203161708U/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104833299A (en) * | 2014-02-07 | 2015-08-12 | 赫尔穆特费希尔有限责任公司电子及测量技术研究所 | Method for electrically controlling a gauge stand and gauge stand for holding a measurement gauge |
| CN104389849B (en) * | 2014-10-13 | 2016-08-17 | 中国运载火箭技术研究院 | A kind of buffering acting device being applicable to gas actuation |
| CN104389849A (en) * | 2014-10-13 | 2015-03-04 | 中国运载火箭技术研究院 | Buffer actuation device suitable for gas actuation |
| CN108757626A (en) * | 2018-05-30 | 2018-11-06 | 徐州永佳液压设备有限公司 | Low voltage starting buffer type hydraulic oil cylinder |
| CN108757626B (en) * | 2018-05-30 | 2020-04-07 | 徐州永佳液压设备有限公司 | Low-pressure starting buffering type hydraulic oil cylinder |
| CN108799252B (en) * | 2018-08-06 | 2024-04-16 | 山西航天清华装备有限责任公司 | Hydraulic cylinder with adjustable bidirectional buffering speed |
| CN108799252A (en) * | 2018-08-06 | 2018-11-13 | 山西航天清华装备有限责任公司 | The adjustable hydraulic cylinder of bidirectional buffering speed |
| CN112983924A (en) * | 2019-12-18 | 2021-06-18 | 比亚迪股份有限公司 | Plunger cylinder and vehicle |
| CN112566824A (en) * | 2020-05-13 | 2021-03-26 | 华为技术有限公司 | Hydraulic adjusting device, hydraulic adjusting system, braking system and control method |
| CN114738350B (en) * | 2022-06-10 | 2022-08-09 | 迪非液压科技江苏有限公司 | High-pressure large-flow hydraulic equipment with self-adaptive buffering function |
| CN114738350A (en) * | 2022-06-10 | 2022-07-12 | 迪非液压科技江苏有限公司 | High-pressure large-flow hydraulic equipment of self-adaptation buffering |
| CN115234541A (en) * | 2022-07-15 | 2022-10-25 | 湖南金源柯重工科技有限公司 | Hydraulic cylinder with high buffer performance |
| CN114962388A (en) * | 2022-07-29 | 2022-08-30 | 江苏恒立液压股份有限公司 | Buffer piston and oil cylinder with same |
| CN114962388B (en) * | 2022-07-29 | 2022-12-23 | 江苏恒立液压股份有限公司 | Buffer piston and oil cylinder with same |
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