CN202612256U - Buffer type oil cylinder for small hydraulic excavator - Google Patents
Buffer type oil cylinder for small hydraulic excavator Download PDFInfo
- Publication number
- CN202612256U CN202612256U CN 201220223572 CN201220223572U CN202612256U CN 202612256 U CN202612256 U CN 202612256U CN 201220223572 CN201220223572 CN 201220223572 CN 201220223572 U CN201220223572 U CN 201220223572U CN 202612256 U CN202612256 U CN 202612256U
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- buffer
- piston
- piston rod
- cushion collar
- sleeve
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Abstract
The utility model discloses a buffer type oil cylinder for a small hydraulic excavator. The oil cylinder comprises a cylinder tube, a front cover, a rear cover, a piston rod and a piston, wherein the front cover and the rear cover are located at two ends of the cylinder tube respectively, the piston rod is located inside the cylinder tube, one end of the piston rod protrudes out of the front cover, the piston is fixed at the rear end of the piston rod, the end portion of a portion of the front cover, which extends into the cylinder tube, is provided with a guide sleeve, a buffer sleeve is fixed at a position on the piston rod, which is close to the piston, an outer circle of the buffer sleeve is in clearance fit with an inner hole of the guide sleeve, at least two buffer channels are evenly distributed in a circumferential direction of the outer circle of the buffer sleeve, buffer channels extend from the front end of the buffer sleeve to the rear end of the buffer sleeve, which is located at a position close to the piston, along the axial direction of the buffer sleeve and are tapered. According to the buffer type oil cylinder, buffer channels are arranged on the outer circle of the buffer sleeve, and when the buffer sleeve enters the guide sleeve for buffering, hydraulic oil is led out from buffer channels and is gradually lessened until the hydraulic oil is cut off finally, so that buffering is achieved, and the problem that actuating mechanisms are damaged due to direct mechanical collision caused by impact force of the hydraulic oil during operation of common hydraulic cylinders is solved.
Description
Technical field
The utility model relates to technical field of hydraulic oil cylinder, and especially a kind of small type hydraulic excavator is used the buffering type oil cylinder.
Background technique
Small type hydraulic excavator; It is high, multi-functional, energy-efficient, the handling good small-sized machine of a kind of widely used technological level of integration; Hydraulic jack as its actuator; Have characteristics such as high speed, high pressure, the requirement of high buffering, the project organization of corresponding other hydraulic jacks and performance are fine or not, directly influence the operational reliability of hydraulic jack.
Usually, the used damping device of hydraulic jack has following several kinds: cylinder type, cone type, porous, its purpose all are in order to reach than short buffer time, to reduce impact, less pressure peak, the conformity of repetitive operation.The structure of hydraulic pressure cylinder cushion is on piston rod, to be provided with cushion collar at present, on guide sleeve, is provided with and cushion collar corresponding buffered hole, and cushion collar or guide sleeve one side are floating buffer mechanism; Cushion collar is cylindrical; Mainly be mode, consume the kinetic energy that the oil hydraulic cylinder motion produces, prevent when oil hydraulic cylinder moves to cylinder head or cylinder tail through throttling; Produce direct mechanical collision, thereby damage actuator.Therefore, the design of the selection of buffering method, the layout of structure, throttling bodies shape, the throttling size coupling that different cylinder diameter is corresponding, the actual conditions of target are the difficult points of hydraulic jack Cushioning Design.
The model utility content
The technical problem that the utility model will solve is: overcome the deficiency in the existing technology; Provide a kind of small type hydraulic excavator to use the buffering type oil cylinder; The impact force that hydraulic oil brings when solving common hydraulic cylinder works and produce direct mechanical collision is damaged the problem of actuator.
The utility model solves the technological scheme that its technical problem adopted: a kind of small type hydraulic excavator is used the buffering type oil cylinder; Comprise cylinder barrel, lay respectively at the cylinder barrel two ends protecgulum and bonnet, be positioned at the piston that cylinder barrel and an end stretch out the piston rod of protecgulum and be fixed on the piston rod rear end; The end that described protecgulum puts in the cylinder barrel part has guide sleeve; Nearly piston place is fixed with cushion collar on the piston rod; Said cushion collar cylindrical and guide sleeve endoporus Spielpassung, cushion collar excircle be to being laid with at least two buffer channels, and buffer channel is axially extended and diminishes gradually to the cushion collar rear end at nearly piston place by the cushion collar front end along cushion collar.
Rise big because of the buffering back pressure is too high for fear of cylinder barrel; The relief hole that described guide sleeve is provided with that oil pocket in an end and the cylinder barrel communicates, the other end communicates with oil inlet pipe on being located at cylinder barrel, the buffering back pressure that when cushion collar just gets into guide sleeve, is produced like this can be passed through the rapid pressure release of relief hole.
Make for simplifying simultaneously, guarantee installation precision, described guide sleeve and protecgulum are structure as a whole.
The beneficial effect of the utility model is: the utility model is owing to be provided with the buffer channel that is axially extended to the back-end and diminished gradually by front end along cushion collar on the outer surface of cushion collar; When its cushion collar of hydraulic cylinder works gets into guide sleeve; Hydraulic oil is derived and minimizing gradually from the buffering passage, until final cutting, thereby has delayed the attack time; Its impact force reduces gradually; Reached the purpose of buffering, the impact force that hydraulic oil brings when having solved common hydraulic cylinder works and produce direct mechanical collision is damaged the problem of actuator.
Description of drawings
Below in conjunction with accompanying drawing and mode of execution the utility model is further specified.
Fig. 1 is the structural representation of the utility model.
1. cylinder barrels, 2. protecgulums, 3. bonnets, 4. piston rods, 5. pistons, 6. guide sleeves, 7. cushion collars, 8. buffer channels, 9. oil inlet pipes, 10. relief holes, 11. oil outlet tubes among the figure
Embodiment
Combine accompanying drawing that the utility model is further described now.These accompanying drawings are only explained the basic structure of the utility model in a schematic way, so it only shows the formation relevant with the utility model.
A kind of small type hydraulic excavator as shown in Figure 1 is used the buffering type oil cylinder; Comprise cylinder barrel 1, lay respectively at cylinder barrel 1 two ends protecgulum 2 and bonnet 3, be positioned at the piston 5 that cylinder barrel 1 and an end stretch out the piston rod 4 of protecgulum 2 and be fixed on piston rod 4 rear ends; Cylinder barrel 1 is provided with oil inlet pipe 9 and oil outlet tube 11; The end that described protecgulum 2 puts in cylinder barrel 1 part has the guide sleeve 6 that is structure as a whole with protecgulum 2, makes to simplify, and guarantees installation precision; Nearly piston 5 places are fixed with cushion collar 7 on the piston rod 4, and said cushion collar 7 cylindricals cooperate in oil cylinder entering buffer time crack with guide sleeve 6 endoporus.
At cushion collar 7 excircles to being arranged with two buffer channels 8 with respect to cushion collar 7 centers; Said buffer channel 8 is a slope shape; Its bottom is in the front end of cushion collar 7, and this buffer channel 8 is axially extended and diminishes until disappearance gradually to cushion collar 7 rear ends at nearly piston 5 places by cushion collar 7 front ends along cushion collar 7 simultaneously.When hydraulic jack work got into phase buffer, cushion collar 7 got in the endoporus of guide sleeve 6, and hydraulic oil is derived from buffering passage 8; Because buffer channel 8 has adopted said structure; Make the hydraulic fluid flow rate of from buffering passage 8, deriving reduce gradually,, reached the purpose of buffering until final cutting.
Rise big because of the buffering back pressure is too high for fear of cylinder barrel 1; Described guide sleeve 6 is provided with relief hole 10; These relief hole 10 1 ends communicate with cylinder barrel 1 interior oil pocket; The other end communicates with oil inlet pipe 9, and the buffering back pressure that when cushion collar 7 has just got into guide sleeve 6 endoporus, has been produced like this can be through relief hole 10 outwards pressure release rapidly.
Adopted the oil cylinder of technique scheme; Owing on the outer surface of cushion collar 7, be provided with the buffer channel 8 that is axially extended to the back-end and diminished gradually by front end along cushion collar 7, when its cushion collar 7 of hydraulic cylinder works got into guide sleeve 6, hydraulic oil was from cushioning passage 8 derivation and reducing gradually; Until final cutting; Thereby delayed the attack time, its impact force reduces gradually, has reached the purpose of buffering; The impact force that hydraulic oil brings when having solved common hydraulic cylinder works and produce direct mechanical collision is damaged the problem of actuator
Above-mentioned mode of execution is only for explaining the technical conceive and the characteristics of the utility model; Its purpose is to let the personage that is familiar with this technology can understand the content of the utility model and implements; Can not limit the protection domain of the utility model with this; All equivalences of being done according to the utility model spirit change or modify, and all should be encompassed in the protection domain of the utility model.
Claims (3)
1. a small type hydraulic excavator is used the buffering type oil cylinder; Comprise cylinder barrel (1), lay respectively at cylinder barrel (1) two ends protecgulum (2) and bonnet (3), be positioned at the piston (5) that cylinder barrel (1) and an end stretch out the piston rod (4) of protecgulum (2) and be fixed on piston rod (4) rear end; It is characterized in that: the end that described protecgulum (2) puts in cylinder barrel (1) part has guide sleeve (6); Piston rod (4) is gone up nearly piston (5) and is located to be fixed with cushion collar (7); Said cushion collar (7) cylindrical and guide sleeve (6) endoporus Spielpassung; Cushion collar (7) excircle is to being laid with at least two buffer channels (8), and buffer channel (8) is axially extended and diminishes gradually to cushion collar (7) rear end that nearly piston (5) is located by cushion collar (7) front end along cushion collar (7).
2. small type hydraulic excavator according to claim 1 is used the buffering type oil cylinder, it is characterized in that: the relief hole (10) that described guide sleeve (6) is provided with that oil pocket in an end and the cylinder barrel (1) communicates, the other end communicates with oil inlet pipe (9) on being located at cylinder barrel (1).
3. small type hydraulic excavator according to claim 1 is used the buffering type oil cylinder, it is characterized in that: described guide sleeve (6) is structure as a whole with protecgulum (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220223572 CN202612256U (en) | 2012-05-17 | 2012-05-17 | Buffer type oil cylinder for small hydraulic excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220223572 CN202612256U (en) | 2012-05-17 | 2012-05-17 | Buffer type oil cylinder for small hydraulic excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202612256U true CN202612256U (en) | 2012-12-19 |
Family
ID=47345959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220223572 Expired - Lifetime CN202612256U (en) | 2012-05-17 | 2012-05-17 | Buffer type oil cylinder for small hydraulic excavator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202612256U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545624A (en) * | 2016-01-19 | 2016-05-04 | 成都远东高科科技有限公司 | Conveniently-dismounted hydraulic manual pump body |
-
2012
- 2012-05-17 CN CN 201220223572 patent/CN202612256U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545624A (en) * | 2016-01-19 | 2016-05-04 | 成都远东高科科技有限公司 | Conveniently-dismounted hydraulic manual pump body |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 213167 Wujin high tech Industrial Development Zone, Jiangsu Province, No. long hidden Road, No. 99 Patentee after: JIANGSU HENGLI HYDRAULIC CO., LTD. Address before: 213167 Wujin high tech Industrial Development Zone, Jiangsu Province, No. long hidden Road, No. 99 Patentee before: Jiangsu Hengli High Pressure Oil Cylinder Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121219 |