CN202031920U - Hydraulic oil cylinder with cushioning device - Google Patents
Hydraulic oil cylinder with cushioning device Download PDFInfo
- Publication number
- CN202031920U CN202031920U CN201120076692XU CN201120076692U CN202031920U CN 202031920 U CN202031920 U CN 202031920U CN 201120076692X U CN201120076692X U CN 201120076692XU CN 201120076692 U CN201120076692 U CN 201120076692U CN 202031920 U CN202031920 U CN 202031920U
- Authority
- CN
- China
- Prior art keywords
- piston
- piston rod
- guide sleeve
- cushion collar
- loculus
- 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.)
- Expired - Lifetime
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- Fluid-Damping Devices (AREA)
Abstract
The utility model discloses a hydraulic oil cylinder with a cushioning device, which comprises a cylinder body, a piston rod, a piston and a guide sleeve which are arranged in the cylinder body, wherein the piston is installed at the inner end of the piston rod, a large cavity is formed by the piston rod and the inner end surface of the piston with the cylinder body, a small cavity is formed between the piston and the guide sleeve, an annular cushion collar is arranged on the piston rod, the cushion collar is arranged in the small cavity, an annular groove communicated with the small cavity is arranged on the inner cylindrical surface of the guide sleeve, the outer diameter of the cushion collar is smaller than the diameter of the annular groove, and a small cavity oil port is arranged at the tail end of the inner side of the annular groove; compared with a traditional cushioning device, the effective volume of the hydraulic oil cylinder with the cushioning device is remarkably increased, the speed of the piston is ensured to decrease progressively, the impact to the piston is smaller, the noise is lower, a working mechanism tends to have stable movement; in addition, the defect that the traditional cushioning device cannot carry out small cavity cushioning is solved when the diameter of the piston rod is larger.
Description
Technical field
The utility model relates to a kind of hydraulic jack, particularly relates to a kind of hydraulic jack that has damping device.
Background technique
The piston rod of hydraulic jack has certain quality, under the driving of big chamber hydraulic coupling, has very big energy (speed is big more, and energy is big more) during motion, enters stroke terminal at piston, can cause mechanical collision, produces very big impact force and noise.Therefore usually need to adopt damping device,, reduce surge pressure, make operation mechanism's motion that more tends to be steady to avoid this mechanical collision; Make operation mechanism's motion that tends to be steady, need allow low-pressure cavity (loculus) fluid kinetic energy is converted into heat energy, and heat energy be taken to outside the hydraulic jack by circuit fluid by certain stroke throttling.
The damping device structure of conventional hydraulic oil cylinder mainly is: the outer rim place that relies on the loculus side at piston designs an annular groove, rely on outer rim place design one annular boss that matches with pistion recess of loculus side at guide sleeve, realize the purpose that cushions by the relative movement in pistion recess and the guide sleeve boss when hydraulic jack is worked.But this structure is owing to will guarantee the intensity of guide sleeve boss, so the size design of boss is bigger, thereby the buffering actual volume is less, is unfavorable for improving shock-absorbing capacity; Simultaneously, when diameter of piston rod is big (hydraulic jack speed ratio greater than 2 time),, is difficult on the piston design groove and on guide sleeve, designs boss, thereby can't realize the loculus buffering at all owing to the intensity reason.
The model utility content
Technical problem to be solved in the utility model provides a kind of hydraulic jack that actual volume is bigger, cushioning effect better has damping device that cushions.
In order to solve the problems of the technologies described above, the utility model adopts following technological scheme: a kind of hydraulic jack that has damping device, comprise cylinder body and place the interior piston rod of cylinder body, piston, guide sleeve, wherein piston is installed in the inner of piston rod, the interior edge face of piston rod and piston and cylinder body form big chamber, form loculus between piston and the guide sleeve, described piston rod is provided with the loop buffer cover, cushion collar is positioned at loculus, offer the circular groove that is communicated with loculus on the guide sleeve inner cylindrical surface, the external diameter of cushion collar is less than the diameter of circular groove, and the inboard tail end of circular groove offers the loculus hydraulic fluid port.
As preferably, an end face of described cushion collar and an end face of piston are fitted.
As preferably, the end face that described cushion collar relies on guide sleeve one side is provided with chamfering.
A kind of hydraulic jack that has damping device of the utility model, the loop buffer cover is set on piston rod, on the guide sleeve inner cylindrical surface, offer the circular groove that is communicated with loculus, after the inboard tail end of circular groove is offered the loculus hydraulic fluid port, in hydraulic jack when work, can be by the cushion collar motion in the guide sleeve circular groove carrying out fluid throttling being converted into kinetic energy heat energy, and heat energy is taken to outside the hydraulic jack by circulation fluid.The utility model is a kind of to be had in the hydraulic jack of damping device, compare traditional damping device, the buffering actual volume enlarges markedly, can realize like this that velocity of piston is more effective and successively decrease, piston is subjected to impacting littler, and noise is littler, operation mechanism's motion that more tends to be steady, and solved when diameter of piston rod is big, can't adopt traditional damping device to carry out the defective of loculus buffering.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Fig. 1 is a kind of structural representation that has the hydraulic jack of damping device of the utility model.
Wherein, reference character: 1 is cylinder body, and 2 is piston rod, and 3 is piston, and 4 is guide sleeve, and 5 is big chamber, and 6 is loculus, and 7 is cushion collar, and 8 is circular groove, and 9 is the loculus hydraulic fluid port, and 10 is the guide sleeve chamfering.
Embodiment
Disclosed all features in this specification, or the step in disclosed all methods or the process except mutually exclusive feature and/or step, all can make up by any way.
Disclosed arbitrary feature in this specification (comprising any accessory claim, summary and accompanying drawing) is unless special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, unless special narration, each feature is an example in a series of equivalences or the similar characteristics.
As shown in Figure 1, a kind of hydraulic jack that has damping device of the utility model, comprise cylinder body 1 and place the interior piston rod 2 of cylinder body, piston 3, guide sleeve 4, wherein piston 3 is installed in the inner of piston rod 2, the interior edge face of piston rod 2 and piston 3 and cylinder body 1 form big chamber 5, form loculus 6 between piston 3 and the guide sleeve 4, piston rod 2 is provided with loop buffer cover 7, cushion collar 7 is positioned at loculus 6, offer the circular groove 8 that is communicated with loculus on guide sleeve 4 inner cylindrical surfaces, the external diameter of cushion collar 7 is less than the diameter of circular groove 8, and the inboard tail end of circular groove 8 offers loculus hydraulic fluid port 9.One end face of cushion collar 7 and an end face of piston 3 are fitted.In order to make cushion collar 7 enter guide sleeve circular groove 8 more reposefully, can chamfering 10 be set at the end face that cushion collar 7 relies on guide sleeve 4 one sides.
As shown in Figure 1, a kind of hydraulic jack that has damping device of the utility model, the buffering actual volume is cushion collar 7 loculus 6 internal volumes when just having entered guide sleeve 4, the relative movement process of cushion collar 7 in guide sleeve circular groove 8 is buffering course.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.
Claims (3)
1. hydraulic jack that has damping device, comprise cylinder body (1) and place the interior piston rod (2) of cylinder body, piston (3), guide sleeve (4), wherein piston (3) is installed in the inner of piston rod (2), the interior edge face of piston rod (2) and piston (3) and cylinder body (1) form big chamber (5), form loculus (6) between piston (3) and the guide sleeve (4), it is characterized in that: described piston rod (2) is provided with loop buffer cover (7), cushion collar (7) is positioned at loculus (6), offer the circular groove (8) that is communicated with loculus on guide sleeve (4) inner cylindrical surface, the external diameter of cushion collar (7) is less than the diameter of circular groove (8), and the inboard tail end of circular groove (8) offers loculus hydraulic fluid port (9).
2. the hydraulic jack that has damping device according to claim 1 is characterized in that: an end face of an end face of described cushion collar (7) and piston (3) is fitted.
3. the hydraulic jack that has damping device according to claim 1 and 2 is characterized in that: the end face that described cushion collar (7) relies on guide sleeve (4) one sides is provided with chamfering (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120076692XU CN202031920U (en) | 2011-03-22 | 2011-03-22 | Hydraulic oil cylinder with cushioning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120076692XU CN202031920U (en) | 2011-03-22 | 2011-03-22 | Hydraulic oil cylinder with cushioning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202031920U true CN202031920U (en) | 2011-11-09 |
Family
ID=44894218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120076692XU Expired - Lifetime CN202031920U (en) | 2011-03-22 | 2011-03-22 | Hydraulic oil cylinder with cushioning device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202031920U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103567812A (en) * | 2013-11-05 | 2014-02-12 | 常州工程职业技术学院 | Positioning oil cylinder for positioning drum |
| CN111946691A (en) * | 2020-07-16 | 2020-11-17 | 中国铁建重工集团股份有限公司 | Hydraulic cylinder, centering clamping hydraulic system, clamping device and drill jumbo |
-
2011
- 2011-03-22 CN CN201120076692XU patent/CN202031920U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103567812A (en) * | 2013-11-05 | 2014-02-12 | 常州工程职业技术学院 | Positioning oil cylinder for positioning drum |
| CN103567812B (en) * | 2013-11-05 | 2016-06-01 | 常州工程职业技术学院 | For the positional cylinder that drum is positioned |
| CN111946691A (en) * | 2020-07-16 | 2020-11-17 | 中国铁建重工集团股份有限公司 | Hydraulic cylinder, centering clamping hydraulic system, clamping device and drill jumbo |
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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: 20111109 |
|
| CX01 | Expiry of patent term |