CN205446259U - Hydraulic cylinder of double piston rods - Google Patents
Hydraulic cylinder of double piston rods Download PDFInfo
- Publication number
- CN205446259U CN205446259U CN201620258408.3U CN201620258408U CN205446259U CN 205446259 U CN205446259 U CN 205446259U CN 201620258408 U CN201620258408 U CN 201620258408U CN 205446259 U CN205446259 U CN 205446259U
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- CN
- China
- Prior art keywords
- buffering
- cylinder body
- piston
- piston rod
- fairlead
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
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Abstract
The utility model relates to a hydraulic cylinder of double piston rods, it includes piston cylinder body, buffering cylinder body, piston rod, cushion collar, uide bushing, check valve, spring and sealing washer its characterized in that, at piston cylinder body both ends each fixed intercommunication buffering cylinder body, the piston rod sets up in the piston cylinder body, and stretch out behind the buffering cylinder body respectively at the piston rod both ends, is equipped with a buffering ring on the piston rod in the piston cylinder body, is equipped with a sealing ring on the buffering ring, is equipped with sealed recess on the sealing ring, is equipped with the sealing washer in sealed recess, by interior and the overcoat is equipped with cushion collar and uide bushing on the piston rod of buffering in the cylinder body, spring suit is equipped with a check valve and makes the fluid can only be from leading oilhole flow direction buffering recess on the piston rod in crossing oily passageway I. The utility model has the advantages of can improve buffering effect, maintain conveniently and long service life.
Description
Technical field
This utility model relates to a kind of hydraulic cylinder, particularly with regard to a kind of hydraulic cylinder with double piston rods.
Background technology
At present on hydraulic test, the particularly hydraulic test of high-speed high-power, the speed of service of hydraulic cylinder is the highest.In order to avoid producing strong shock and vibration, it is ensured that system smooth working, prevent drive disk assembly from damaging, improve service behaviour and the life-span of hydraulic system, it is necessary to terminate advance row buffering at hydraulic cylinder travel.At present, way to play for time has two kinds substantially: one is hydraulic cylinder external control, and its structure is more complicated；One is hydraulic cylinder indoor design buffering, its simple in construction, compact, thus is widely used.In existing technology, hydraulic cylinder uses gap throttling buffering technology mostly, is i.e. sealed by the matched in clearance between buffer plunger and cushion hole and throttles, thus realizes buffering.But the deficiency of this buffer structure has: 1. require that there is between buffer plunger and cushion hole high axiality and minimum fit clearance, thus cause machining accuracy higher, and its fit clearance and passage section directly influence the buffering effect of oil cylinder；2. using the occasion that frequency is higher, buffer plunger and cushion hole easily wear out failure；3. the repairing of buffer structure is difficult in maintenance.
Summary of the invention
For above-mentioned shortcoming, the purpose of this utility model is that providing a kind of can improve buffering effect, the easy to maintenance and hydraulic cylinder with double piston rods of length in service life.
Technology contents of the present utility model is, a kind of hydraulic cylinder with double piston rods, it is characterised in that it includes piston/cylinder, buffering cylinder body, piston rod, cushion collar, fairlead, check valve, spring and sealing ring；At piston/cylinder two ends, each fixing connection one buffers cylinder body；Piston rod is arranged in piston/cylinder, stretches out, the piston rod in piston/cylinder is provided with a buffering ring, be provided with a sealing ring on buffering ring, be provided with sealed groove on sealing ring, be provided with sealing ring in sealed groove after the most buffered cylinder body in piston rod two ends；It is set with cushion collar and fairlead from inside to outside on piston rod in buffering cylinder body, is formed with one between cushion collar and piston rod and crosses oil ring hole；The medial surface of cushion collar is provided with a cushion collar shrinkage pool, the fairlead medial surface corresponding with cushion collar shrinkage pool is provided with a fairlead shrinkage pool, spring housing dress on the piston rod and is in cushion collar shrinkage pool and fairlead shrinkage pool, the outside of cushion collar medial surface is provided with some valley gutters, the outside of the fairlead medial surface corresponding with valley gutter is provided with a diversion groove, and fairlead medial surface is communicated with the fairlead through hole of fairlead shrinkage pool and diversion groove；The buffering inboard wall of cylinder block corresponding with valley gutter is provided with a loop buffer groove, buffering cylinder body is provided with oil guiding hole communicate with buffer groove, it is provided with one on buffering cylinder body between oil guiding hole and the diversion groove of fairlead and crosses oil passage I, in crossing oil passage I, be provided with a check valve make fluid can only flow to buffer groove from oil guiding hole；Buffering cylinder body is provided with one and crosses oil passage II, cross oil passage II for the inner space by oil guiding hole and buffering cylinder body with the buffering cylinder body of piston/cylinder junction.
In above-mentioned hydraulic cylinder with double piston rods, the outside diameter of cushion collar is more than the outside diameter of buffering ring, and the outside diameter of buffering ring was more than the outside diameter in oil ring hole.
For improving buffering effect, it is set to scalene cone in the outside of cushion collar lateral surface.
This utility model compared with prior art have the advantage that is, this utility model leaves annular gap due to piston rod and cushion collar, the cumulative error eliminate welding, the being assembled to form impact on buffering effect, buffering effect is the most by welding and the factor such as assembling is affected, it is to avoid cause because clearance control is inaccurate cushion collar and cushion chamber stuck, pull；This utility model simple in construction, compact, it is not necessary to consider the axiality problem of cushion collar and piston rod, buffer gap quality of fit is high, and processing technique is simple, and good buffer effect, service life is long, repairs easy to maintenance.
Accompanying drawing explanation
Fig. 1 is the structural representation of utility model.
Fig. 2 is that this utility model buffers initial state schematic diagram.
Fig. 3 is that this utility model buffers done state schematic diagram.
Detailed description of the invention
As it is shown in figure 1, a kind of hydraulic cylinder with double piston rods, it is characterised in that it includes piston/cylinder 1, buffering cylinder body 2, piston rod 3, cushion collar 4, fairlead 5, check valve 6, spring 7 and sealing ring 8；At piston/cylinder 1 two ends, each fixing connection one buffers cylinder body 2；Piston rod 3 is arranged in piston/cylinder 1, stretch out after the most buffered cylinder body in piston rod 3 two ends 2, a buffering ring 3.1 it is provided with on piston rod 3 in piston/cylinder 1, buffering ring 3.1 is provided with a sealing ring 3.1.1, sealing ring 3.1.1 is provided with sealed groove 3.1.2, sealed groove 3.1.2 is provided with sealing ring 8；It is set with cushion collar 4 and fairlead 5 from inside to outside on piston rod 3 in buffering cylinder body 2, is formed with one between cushion collar 4 and piston rod 3 and crosses oil ring hole 4.1, between fairlead 5 and piston rod 3, be provided with sealing ring 8；The diameter of cushion collar 4 is more than the diameter of buffering ring 3.1, and the diameter of buffering ring 3.1 was more than the diameter in oil ring hole 4.1；The medial surface of cushion collar 4 is provided with a cushion collar shrinkage pool 4.2, fairlead 5 medial surface corresponding with cushion collar shrinkage pool is provided with a fairlead shrinkage pool 5.1, spring 7 is sleeved on piston rod 3 and is in cushion collar shrinkage pool 4.2 and fairlead shrinkage pool 5.1, the outside of cushion collar 4 medial surface is provided with some valley gutters 4.3, the outside of fairlead 5 medial surface corresponding with valley gutter 4.3 is provided with a diversion groove 5.2, and fairlead 5 medial surface is communicated with the fairlead through hole 5.3 of fairlead shrinkage pool 5.1 and diversion groove 5.2；Buffering cylinder body 2 inwall corresponding with valley gutter 4.3 is provided with a loop buffer groove 2.1, buffering cylinder body 2 is provided with oil guiding hole 2.2 communicate with buffer groove 2.1, it is provided with one on buffering cylinder body 2 between the diversion groove 5.2 of oil guiding hole 2.2 and fairlead 5 and crosses oil passage I 2.3, in crossing oil passage I 2.3, be provided with a check valve 6 make fluid can only flow to buffer groove 5.2 from oil guiding hole 2.2；Buffering cylinder body 2 is provided with one and crosses oil passage II 2.4, cross oil passage II 2.4 for the inner space by oil guiding hole 2.2 and buffering cylinder body 2 with the buffering cylinder body 2 of piston/cylinder 1 junction；It is set to scalene cone in the outside of cushion collar 2 lateral surface.
Operation principle of the present utility model is, it is divided into A chamber and B chamber by sealing ring 3.1.1 in piston/cylinder 1 in this utility model, piston rod 3 is buffered ring 3.1 and is divided into two, left and right, when by left side buffering cylinder body 2 oil guiding hole 2.2 fuel feeding in A chamber time, piston rod 3 moves right and makes buffering ring 3.1 be in buffering initial state when contacting with cushion collar 4, as shown in Figure 2, now buffering ring 3.1 is sealing surface with the end face that contacts of cushion collar 4, having sealed simultaneously and crossed oil ring hole 4.1, the fluid in B chamber is separated with the fluid in the buffering cylinder body 2 of right side；Piston rod 3 continues to move right and make buffering ring 3.1 to extrude cushion collar 4, fluid in the C chamber of right side buffering cylinder body 2 enters oil guiding hole 2.2 through valley gutter 4.3 and loop buffer groove 2.1, a portion fluid is excluded, and a part of fluid is flowed in B chamber through oil passage II 2.4；Along with piston rod 3 moves right, orifice size is gradually reduced, and oil return resistance is gradually increased, until piston rod 3 stops, as shown in Figure 3；When buffering oil guiding hole 2.2 oiling of cylinder body 2 to the right, a part of fluid flows into B chamber through oil passage II 2.4 and promotes piston rod 3 to be moved to the left, and now buffering ring 3.1 is separated in the end face that contacts sealed with cushion collar 4；The most a part of fluid buffers in the C chamber of cylinder body 2 on the right side of oil passage I 2.3, check valve 6 and fairlead shrinkage pool 5.1 flow into, again in fairlead through hole 5.3 flows into fairlead shrinkage pool 5.1, now cushion collar 4 is moved to the left until buffering the junction of cylinder body 2 and piston/cylinder 1 on the right side of arriving under the effect of spring 7, and piston rod 3 machinery is moved to the left the buffer-process thus carrying out left side buffering cylinder body 2.
Claims (3)
1. a hydraulic cylinder with double piston rods, it is characterised in that it includes piston/cylinder, buffering cylinder body, piston rod, cushion collar, fairlead, check valve, spring and sealing ring；At piston/cylinder two ends, each fixing connection one buffers cylinder body；Piston rod is arranged in piston/cylinder, stretches out, the piston rod in piston/cylinder is provided with a buffering ring, be provided with a sealing ring on buffering ring, be provided with sealed groove on sealing ring, be provided with sealing ring in sealed groove after the most buffered cylinder body in piston rod two ends；It is set with cushion collar and fairlead from inside to outside on piston rod in buffering cylinder body, is formed with one between cushion collar and piston rod and crosses oil ring hole；The medial surface of cushion collar is provided with a cushion collar shrinkage pool, the fairlead medial surface corresponding with cushion collar shrinkage pool is provided with a fairlead shrinkage pool, spring housing dress on the piston rod and is in cushion collar shrinkage pool and fairlead shrinkage pool, the outside of cushion collar medial surface is provided with some valley gutters, the outside of the fairlead medial surface corresponding with valley gutter is provided with a diversion groove, and fairlead medial surface is communicated with the fairlead through hole of fairlead shrinkage pool and diversion groove；The buffering inboard wall of cylinder block corresponding with valley gutter is provided with a loop buffer groove, buffering cylinder body is provided with oil guiding hole communicate with buffer groove, it is provided with one on buffering cylinder body between oil guiding hole and the diversion groove of fairlead and crosses oil passage I, in crossing oil passage I, be provided with a check valve make fluid can only flow to buffer groove from oil guiding hole；Buffering cylinder body is provided with one and crosses oil passage II, cross oil passage II for the inner space by oil guiding hole and buffering cylinder body with the buffering cylinder body of piston/cylinder junction.
Hydraulic cylinder with double piston rods the most according to claim 1, it is characterised in that the outside diameter of cushion collar is more than the outside diameter of buffering ring, and the outside diameter of buffering ring was more than the outside diameter in oil ring hole.
Hydraulic cylinder with double piston rods the most according to claim 1, it is characterised in that be set to scalene cone in the outside of cushion collar lateral surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620258408.3U CN205446259U (en) | 2016-03-31 | 2016-03-31 | Hydraulic cylinder of double piston rods |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620258408.3U CN205446259U (en) | 2016-03-31 | 2016-03-31 | Hydraulic cylinder of double piston rods |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205446259U true CN205446259U (en) | 2016-08-10 |
Family
ID=56608538
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620258408.3U Withdrawn - After Issue CN205446259U (en) | 2016-03-31 | 2016-03-31 | Hydraulic cylinder of double piston rods |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205446259U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105650055A (en) * | 2016-03-31 | 2016-06-08 | 江阴市洪腾机械有限公司 | Dual-piston-rod hydraulic cylinder |
| CN106044563A (en) * | 2016-08-12 | 2016-10-26 | 太原重型机械集团工程技术研发有限公司 | Crane, and balancing device for crane |
| CN110778566A (en) * | 2019-11-01 | 2020-02-11 | 北京特种机械研究所 | Mechanical hydraulic cylinder braking device |
| CN110778567A (en) * | 2019-11-01 | 2020-02-11 | 北京特种机械研究所 | Hydraulic cylinder stroke tail end buffering braking method |
-
2016
- 2016-03-31 CN CN201620258408.3U patent/CN205446259U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105650055A (en) * | 2016-03-31 | 2016-06-08 | 江阴市洪腾机械有限公司 | Dual-piston-rod hydraulic cylinder |
| CN106044563A (en) * | 2016-08-12 | 2016-10-26 | 太原重型机械集团工程技术研发有限公司 | Crane, and balancing device for crane |
| CN110778566A (en) * | 2019-11-01 | 2020-02-11 | 北京特种机械研究所 | Mechanical hydraulic cylinder braking device |
| CN110778567A (en) * | 2019-11-01 | 2020-02-11 | 北京特种机械研究所 | Hydraulic cylinder stroke tail end buffering braking method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160810 Effective date of abandoning: 20170531 |
|
| AV01 | Patent right actively abandoned |