CN201982410U - Single acting piston-cylinder with upper buffer function - Google Patents
Single acting piston-cylinder with upper buffer function Download PDFInfo
- Publication number
- CN201982410U CN201982410U CN2010206780004U CN201020678000U CN201982410U CN 201982410 U CN201982410 U CN 201982410U CN 2010206780004 U CN2010206780004 U CN 2010206780004U CN 201020678000 U CN201020678000 U CN 201020678000U CN 201982410 U CN201982410 U CN 201982410U
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- piston
- cylinder
- oil
- piston rod
- hydraulic fluid
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Abstract
The utility model relates to a single acting piston-cylinder with an upper buffer function, which has a simple structure and a good buffer effect, and prevents a piston rod from stopping immediately and rigidly when the piston rod is lifted to the top so as to reduce the generated impact force when the piston rod stops. The single acting piston-cylinder with the upper buffer function comprises a cylinder, a piston rod and a piston, wherein the piston divides the cylinder into two sealed cavities, i.e. a force side oil cavity and a buffer oil cavity, and one end of the cylinder is provided with an oil inlet and outlet port. The single acting piston-cylinder with the upper buffer function is characterized in that: an oil storage cavity is arranged inside the piston rod, and simultaneously, an oil through port and a buffer oil port which are communicated with the buffer oil cavity and the oil storage cavity are respectively arranged on the side wall of the piston rod; and the buffer oil port is positioned at a joint of the piston rod and the piston. The single acting piston-cylinder with the upper buffer function is mainly suitable for being used in forklifts.
Description
Technical field
The utility model relates to a kind of fork truck and hoists and use hydraulic jack, and particularly a kind of single action piston cylinder with last pooling feature is mainly used in fork truck.
Background technique
Hydraulic jack is subjected to the favor of industry-by-industry with the advantage of its working stability, particularly uses particularly extensive in the fork truck hoisting system.At present, the hydraulic jack that is used on the fork truck is most of owing to lack pooling feature, there are the following problems: piston rod rises when being raised to the top, forklift door frame stops immediately, door frame is had great impact, and is accompanied by the Strike note of metal, influence goods on the pallet fork steadily, even cause the goods on the pallet fork to drop, threaten ground handling personnel's personal safety.
Summary of the invention
The technical problems to be solved in the utility model is: the single action piston cylinder with last pooling feature that a kind of simple in structure, good buffer effect is provided at the problem of above-mentioned existence, rigidity stops to avoid piston rod to rise to behind the top at once, to reduce the impact force that produces when piston rod stops.
The technological scheme that the utility model adopted is: the single action piston cylinder with last pooling feature, comprise cylinder body, piston rod and piston, wherein piston is divided into stressed side oil pocket and two seal chambers of buffering oil pocket with cylinder body, described cylinder body one end is offered the oil inlet and outlet that is communicated with stressed side oil pocket, it is characterized in that: shoe cream room is offered in described piston rod inside, on this piston rod sidewall, offer simultaneously the logical hydraulic fluid port and the buffering hydraulic fluid port that are communicated with buffering oil pocket and shoe cream room respectively, wherein cushion the joint that hydraulic fluid port is positioned at piston rod and piston.
The diameter of described buffering hydraulic fluid port is 2～5mm.
The diameter of described logical hydraulic fluid port is greater than the diameter of buffering hydraulic fluid port.
Described logical hydraulic fluid port enters in the guide sleeve and is plugged the buffer distance that oil cylinder stroke finishes is 26mm (is example with 3 tons oil cylinders).
Offer the oil hole that is used to be communicated with the outside of cushioning oil pocket on the described cylinder side wall, and the oiling screw is installed in sealing.
The beneficial effects of the utility model are: the utility model is offered shoe cream room in piston rod inside, on this piston rod sidewall, offer simultaneously the logical hydraulic fluid port and the buffering hydraulic fluid port that are communicated with buffering oil pocket and shoe cream room respectively, wherein, the buffering hydraulic fluid port is positioned at the joint of piston rod and piston.Hydraulic oil when piston rod rises in the buffering oil pocket enters in the shoe cream room by logical hydraulic fluid port and buffering hydraulic fluid port, behind piston rod rising certain distance, logical hydraulic fluid port enters in the guide sleeve and is plugged, and the hydraulic oil that cushions this moment in the oil pocket only enters in the shoe cream room by the buffering hydraulic fluid port.Because buffering hydraulic fluid port diameter is less, passage section reduces, significantly reduced the rate of climb of piston rod, has avoided piston rod in the prior art from rapidly moving to the phenomenon that rigidity at once stops, thereby greatly reduce the impact force that produces when piston rod stops, having realized buffering.
Description of drawings
Fig. 1 is the main sectional view of general operation phase of the utility model.
Fig. 2 is the main sectional view of the utility model when entering buffer stage.
Fig. 3 is the A portion enlarged view of Fig. 2.
Embodiment
As shown in Figure 1-Figure 3, present embodiment comprises cylinder body 4, and place in this cylinder body and the piston rod 3 and the piston 10 that contact with the cylinder body sealing, wherein piston 10 is divided into stressed side oil pocket 2 and 5 two seal chambers of buffering oil pocket with cylinder body 4, described cylinder body 4 one ends are offered the oil inlet and outlet 1 that is communicated with stressed side oil pocket 2, the oil-feed when being used for piston rod 3 liftings and fuel-displaced; Shoe cream room 9 is offered in described piston rod 3 inside, and the while is offered logical hydraulic fluid port 6 and the buffering hydraulic fluid port 7 that is communicated with buffering oil pocket 5 and shoe cream room 9 respectively on this piston rod sidewall, wherein cushion the joint that hydraulic fluid port 7 is positioned at piston rod 3 and piston 10.Logical hydraulic fluid port 6 enters guide sleeve 11, and to be plugged the distance that oil cylinder stroke finishes be buffer distance, and this distance can be determined according to the needs of actual conditions.The size of buffering hydraulic fluid port 7 diameters has determined the length of buffer time and the quality of buffering effect.With 3 tons oil cylinders is example, and buffer distance is 26mm, and the diameter of buffering hydraulic fluid port 7 is the minimum 2mm of place.Both guarantee good cushioning effect, guaranteed again that buffer time was unlikely to long, satisfied user demand; Simultaneously, speed when rising for assurance piston rod 3, the diameter of described logical hydraulic fluid port 6 should be greater than the diameter of buffering hydraulic fluid port 7.
Offer the oil hole that is used to be communicated with the outside of cushioning oil pocket 5 on described cylinder body 4 sidewalls, and oiling screw 8 is installed in sealing.For new oil cylinder, owing to there is not the hydraulic oil of internal leakage in the buffering oil pocket 5, can realize buffering for making it, need open oiling screw 8 in advance, in buffering oil pocket 5, inject a certain amount of hydraulic oil by oil hole.
The working principle of present embodiment is: when forklift door frame hoists, the hydraulic oil that fuel tank comes out enters stressed side oil pocket 2 from oil inlet and outlet 1, promoting piston rod 3 rises, because buffering has in the oil pocket 5 hydraulic oil to have that (hoisting always has oily internal leakage to cushioning in the oil pocket 5 all the time at every turn, new oil cylinder must be opened oiling screw 8 and inject a certain amount of hydraulic oil), therefore along with the rising of piston rod 3, air in the buffering oil pocket 5 and hydraulic oil enter in the shoe cream room 9 by logical hydraulic fluid port 6 and buffering hydraulic fluid port 7; When piston rod 3 rises to certain altitude, when piston 10 is about to run into cylinder block 4 (as Fig. 2, shown in Figure 3), leads to hydraulic fluid port 6 and enter in the guide sleeve 11 of cylinder body 4, and be plugged; At this moment; because logical hydraulic fluid port 6 is plugged; hydraulic oil in the buffering oil pocket 5 (buffer function) only can flow into shoe cream room 9 by buffering hydraulic fluid port 7; passage section reduces, and produce a resistance this moment at once, and piston rod 3 can also continue up to move; but the speed that rises obviously descends; when piston 10 knocked cylinder block 4, the rate of climb of piston 10 was very slow, thereby had played the effect of buffering.When door frame descended, the hydraulic oil in the stressed side oil pocket 2 was back in the fuel tank through oil inlet and outlet 1, and piston rod 3 is descending simultaneously, and logical hydraulic fluid port 6 is opened, and the hydraulic oil in the shoe cream room 9 is back in the buffering oil pocket 5 through logical hydraulic fluid port 6 and buffering hydraulic fluid port 7 under action of gravity.
Claims (5)
1. single action piston cylinder with last pooling feature, comprise cylinder body (4), piston rod (3) and piston (10), wherein piston (10) is divided into stressed side oil pocket (2) and (5) two seal chambers of buffering oil pocket with cylinder body (4), described cylinder body (4) one ends are offered the oil inlet and outlet (1) that is communicated with stressed side oil pocket (2), it is characterized in that: shoe cream room (9) is offered in described piston rod (3) inside, on this piston rod sidewall, offer simultaneously the logical hydraulic fluid port (6) and the buffering hydraulic fluid port (7) that are communicated with buffering oil pocket (5) and shoe cream room (9) respectively, wherein cushion the joint that hydraulic fluid port (7) is positioned at piston rod (3) and piston (10).
2. the single action piston cylinder with last pooling feature according to claim 1 is characterized in that: the diameter of described buffering hydraulic fluid port (7) is 2～5mm.
3. the single action piston cylinder with last pooling feature according to claim 1 is characterized in that: the diameter of described logical hydraulic fluid port (6) is greater than the diameter of buffering hydraulic fluid port (7).
4. the single action piston cylinder with last pooling feature according to claim 1 is characterized in that: described logical hydraulic fluid port (6) is 26mm from the buffer distance that is plugged the oil cylinder stroke end.
5. the single action piston cylinder with last pooling feature according to claim 1 is characterized in that: offer the oil hole that is used for being communicated with the outside of cushioning oil pocket (5) on described cylinder body (4) sidewall, and oiling screw (8) is installed in sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206780004U CN201982410U (en) | 2010-12-13 | 2010-12-13 | Single acting piston-cylinder with upper buffer function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206780004U CN201982410U (en) | 2010-12-13 | 2010-12-13 | Single acting piston-cylinder with upper buffer function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201982410U true CN201982410U (en) | 2011-09-21 |
Family
ID=44609872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206780004U Expired - Lifetime CN201982410U (en) | 2010-12-13 | 2010-12-13 | Single acting piston-cylinder with upper buffer function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201982410U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015043307A1 (en) * | 2013-09-25 | 2015-04-02 | Shenzhen Byd Auto R&D Company Limited | Piston cyliner and forklift having the same |
| WO2015058645A1 (en) * | 2013-10-24 | 2015-04-30 | Byd Company Limited | Single-way damping plunger cylinder and forklift comprising the same |
| CN107575433A (en) * | 2017-09-30 | 2018-01-12 | 重庆维庆液压机械有限公司 | Anti-tamper hydraulic cylinder |
-
2010
- 2010-12-13 CN CN2010206780004U patent/CN201982410U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015043307A1 (en) * | 2013-09-25 | 2015-04-02 | Shenzhen Byd Auto R&D Company Limited | Piston cyliner and forklift having the same |
| WO2015058645A1 (en) * | 2013-10-24 | 2015-04-30 | Byd Company Limited | Single-way damping plunger cylinder and forklift comprising the same |
| EP2865918A3 (en) * | 2013-10-24 | 2016-03-23 | BYD Company Limited | Hydraulic cylinder with one-way damping arrangement and forklift comprising the same |
| US10161427B2 (en) | 2013-10-24 | 2018-12-25 | Byd Company Limited | Single-way damping plunger cylinder and forklift comprising the same |
| CN107575433A (en) * | 2017-09-30 | 2018-01-12 | 重庆维庆液压机械有限公司 | Anti-tamper hydraulic cylinder |
| CN107575433B (en) * | 2017-09-30 | 2019-02-22 | 重庆维庆液压机械有限公司 | Anti-tamper hydraulic cylinder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110921 |
|
| CX01 | Expiry of patent term |