CN110307205A - Hydraulic cylinder piston anti-loose structure - Google Patents
Hydraulic cylinder piston anti-loose structure Download PDFInfo
- Publication number
- CN110307205A CN110307205A CN201910635260.9A CN201910635260A CN110307205A CN 110307205 A CN110307205 A CN 110307205A CN 201910635260 A CN201910635260 A CN 201910635260A CN 110307205 A CN110307205 A CN 110307205A
- Authority
- CN
- China
- Prior art keywords
- piston
- piston rod
- threaded hole
- inner end
- hydraulic cylinder
- 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.)
- Pending
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/26—Locking mechanisms
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
- Actuator (AREA)
Abstract
The present invention discloses a kind of hydraulic cylinder piston anti-loose structure, belongs to hydraulic cylinder technical field.Piston including piston rod and suit on the piston rod；External screw thread is provided on the periphery of the piston rod inner end, the piston center hole is provided with internal screw thread, and piston, which is connected through a screw thread, is mounted on piston rod inner end；The piston rod inner face is provided with inclined threaded hole, and threaded hole inner end is connected on piston rod circumferential surface；The piston center hole inner wall is provided with a circle deep gouge, and deep gouge is opposite with threaded hole inner end；Sunk screw is installed, sunk screw inner end is against in piston deep gouge in the piston rod thread hole.The present invention resists the inner groove of piston by sunk screw, prevents piston from rotating, and plays the effect of retaining and positioning；For piston it is only necessary to process inner groove, processing technology is simple, and piston good integrity improves its service life.
Description
Technical field
The present invention relates to hydraulic cylinder technical field, specifically a kind of hydraulic cylinder piston anti-loose structure.
Background technique
Piston cylinder is one of the most common type hydraulic pressure execution device in hydraulic system comprising cylinder barrel, piston, piston rod and close
Seal apparatus etc..Piston is generally connected through a screw thread mode with piston rod and fits together.Specifically, piston can have threaded hole,
And piston rod can have thread head, the thread head of piston rod is screwed in the threaded hole of piston to realize assembling.However, with
Piston cylinder constantly work, the threaded connection between piston and piston rod is there may be loosening or even disengaging, to cause to live
Plug cylinder can not work normally as requested.
In order to avoid the threaded connection between piston and piston rod to generate loosening as far as possible, mainly using two ways: first,
Using the pattern of welding, this structural shape is simple, but is not easy to dismantle；Second, using limit methods such as screws.
In the prior art, a kind of piston connection for hydraulic cylinder that screw limit method mainly has Chinese patent to announce is anti-
Loose structure (CN205260489U) comprising piston rod, cylinder barrel and piston, the piston rod are inserted into the cylinder barrel, the work
Plug is connected on the piston rod by helicitic texture, is provided with seal assembly between the piston and the inner wall of the cylinder barrel,
Wherein, an annular groove is offered on the piston rod, a locking steel ball is provided in the annular groove, the locking steel ball is by being set to
The end locking assembly of the piston is fixed.
Current screw limit method is that threaded hole is opened on piston, cooperates the mode that limiting slot is opened on piston rod,
Present in defect be:
The hardness of piston is not so good as metal, and the difficulty of processing for opening threaded hole on it is very high, also, piston aperture seriously affects it and makes
With the service life, tapping is easy cracking.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of simple hydraulic cylinder piston anti-loose structure of processing technology,
It is equally utilized in the present invention that screw limit method, but threaded hole is not opened on piston, guarantee the whole degree of piston, improves it and use the longevity
Life.
The invention is realized by the following technical scheme: a kind of hydraulic cylinder piston anti-loose structure, including piston rod and suit
Piston on the piston rod；External screw thread is provided on the periphery of the piston rod inner end, the piston center hole is provided with internal screw thread, living
Plug, which is connected through a screw thread, is mounted on piston rod inner end；The piston rod inner face is provided with inclined threaded hole, and threaded hole inner end connects
It passes on piston rod circumferential surface；The piston center hole inner wall is provided with a circle deep gouge, and deep gouge is opposite with threaded hole inner end；The piston
Sunk screw is installed, sunk screw inner end is against in piston deep gouge in bar threaded hole.
It is further: the outer end of the sunk screw is equipped with a sealing-plug being mounted in piston rod thread hole.
The outer end inner wall in the piston rod thread hole is provided with deep gouge, and sealing-plug periphery has boss, and sealing-plug boss is matched
It closes in insertion piston rod thread hole deep gouge.
The piston center hole medial surface has inner stopper, and piston rod inner end, which is equipped with, to be cooperated with piston center hole inner stopper
Step.
Sealing ring is equipped between the piston center hole inner stopper and piston rod step.
The piston rod thread hole is provided with 1 to 3.
Compared with prior art, it the beneficial effects of the present invention are: resisting the inner groove of piston by sunk screw, prevents from living
Plug rotation, plays the effect of retaining and positioning；For piston it is only necessary to process inner groove, processing technology is simple, and piston is whole
Body is good, improves its service life.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention；
Fig. 2 is the enlarged drawing in Fig. 1 at piston；
In figure: 1, piston rod；2, piston；3, sunk screw；4, sealing-plug；5, sealing ring.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As shown in Figure 1 to Figure 2, a kind of hydraulic cylinder piston anti-loose structure, including piston rod 1 and be sleeved on piston rod 1
Piston 2；External screw thread, 2 centre bore internal screw thread of piston are provided on 1 inner end periphery of piston rod, piston 2 is connected through a screw thread installation
In 1 inner end of piston rod.1 inner face of piston rod is provided with inclined 1 to 3 threaded hole, and the particular number of threaded hole is in piston rod 1
Holding diameter is reference, and the bigger threaded hole opened up of diameter can be more, and threaded hole inner end is connected on 1 circumferential surface of piston rod.Piston 2
Center bore inner wall is provided with a circle deep gouge, and deep gouge is opposite with threaded hole inner end；Sunk screw 3 is installed in 1 threaded hole of piston rod, is sunk
3 inner end of head screw is against in 2 deep gouge of piston.
Preferred: sealing-plug 4 is arranged in the outer end of sunk screw 3, to protect sunk screw 3.The outer end of 1 threaded hole of piston rod
Inner wall is provided with deep gouge, and 4 periphery of sealing-plug has boss, and the cooperation of 4 boss of sealing-plug is embedded in 1 threaded hole deep gouge of piston rod.
Preferred: in order to improve piston seal effect, 2 centre bore medial surface of piston has inner stopper, and 1 inner end of piston rod is set
There is the step with the cooperation of 2 centre bore inner stopper of piston.Sealing ring is equipped between 2 centre bore inner stopper of piston and 1 step of piston rod
5。
There is above-described embodiment can be seen that
First, the present invention resists the inner groove of piston by sunk screw, prevents piston from rotating, and plays the effect of retaining and positioning
Fruit；
Second, for piston it is only necessary to process inner groove, processing technology is simple, and piston good integrity improves its use
Service life.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (6)
1. a kind of hydraulic cylinder piston anti-loose structure, including piston rod (1) and the piston (2) being sleeved on piston rod (1)；
It is characterized by:
External screw thread is provided on the periphery of piston rod (1) inner end, piston (2) centre bore is provided with internal screw thread, and piston (2) is logical
It crosses threaded connection and is mounted on piston rod (1) inner end；
Piston rod (1) inner face is provided with inclined threaded hole, and threaded hole inner end is connected on piston rod (1) circumferential surface；It is described
Piston (2) center bore inner wall is provided with a circle deep gouge, and deep gouge is opposite with threaded hole inner end；It is installed in piston rod (1) threaded hole
Have sunk screw (3), sunk screw (3) inner end is against in piston (2) deep gouge.
2. hydraulic cylinder piston anti-loose structure according to claim 1, it is characterised in that: outside the sunk screw (3)
End is equipped with a sealing-plug (4) being mounted in piston rod (1) threaded hole.
3. hydraulic cylinder piston anti-loose structure according to claim 1, it is characterised in that: piston rod (1) threaded hole
Outer end inner wall be provided with deep gouge, sealing-plug (4) periphery has boss, sealing-plug (4) boss cooperation insertion piston rod (1) screw thread
In the deep gouge of hole.
4. hydraulic cylinder piston anti-loose structure according to claim 1, it is characterised in that: in piston (2) centre bore
Side has inner stopper, and piston rod (1) inner end is equipped with the step cooperated with piston (2) centre bore inner stopper.
5. hydraulic cylinder piston anti-loose structure according to claim 4, it is characterised in that: in piston (2) centre bore
Sealing ring (5) are equipped between seam allowance and piston rod (1) step.
6. hydraulic cylinder piston anti-loose structure according to claim 1, it is characterised in that: piston rod (1) threaded hole
It is provided with 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910635260.9A CN110307205A (en) | 2019-07-15 | 2019-07-15 | Hydraulic cylinder piston anti-loose structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910635260.9A CN110307205A (en) | 2019-07-15 | 2019-07-15 | Hydraulic cylinder piston anti-loose structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110307205A true CN110307205A (en) | 2019-10-08 |
Family
ID=68081273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910635260.9A Pending CN110307205A (en) | 2019-07-15 | 2019-07-15 | Hydraulic cylinder piston anti-loose structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110307205A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2021173328A (en) * | 2020-04-24 | 2021-11-01 | 日立Astemo株式会社 | Piston rod assembly, shock absorber, and manufacturing method of piston rod assembly |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001289320A (en) * | 2000-02-03 | 2001-10-19 | Nabco Ltd | Manufacturing method of piston rod, piston rod and cylinder |
| CN201209616Y (en) * | 2008-06-25 | 2009-03-18 | 黄贵华 | Anti-releasing nut for transmission shaft of machine tool |
| CN201723553U (en) * | 2010-07-20 | 2011-01-26 | 中国航空工业集团公司西安飞机设计研究所 | Mechanism for preventing screw stem from being screwed out of blind hole screw sleeve |
| CN202326625U (en) * | 2011-11-26 | 2012-07-11 | 广州市昊志机电股份有限公司 | Locking nut structure for ball high-speed mechanical main shaft |
| CN204692231U (en) * | 2015-03-20 | 2015-10-07 | 山东临工工程机械有限公司 | A kind of hydraulic cylinder piston anti-loose structure |
| CN207598905U (en) * | 2017-12-06 | 2018-07-10 | 江苏恒立液压股份有限公司 | The anti-loosening device of piston of oil cylinder |
-
2019
- 2019-07-15 CN CN201910635260.9A patent/CN110307205A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001289320A (en) * | 2000-02-03 | 2001-10-19 | Nabco Ltd | Manufacturing method of piston rod, piston rod and cylinder |
| CN201209616Y (en) * | 2008-06-25 | 2009-03-18 | 黄贵华 | Anti-releasing nut for transmission shaft of machine tool |
| CN201723553U (en) * | 2010-07-20 | 2011-01-26 | 中国航空工业集团公司西安飞机设计研究所 | Mechanism for preventing screw stem from being screwed out of blind hole screw sleeve |
| CN202326625U (en) * | 2011-11-26 | 2012-07-11 | 广州市昊志机电股份有限公司 | Locking nut structure for ball high-speed mechanical main shaft |
| CN204692231U (en) * | 2015-03-20 | 2015-10-07 | 山东临工工程机械有限公司 | A kind of hydraulic cylinder piston anti-loose structure |
| CN207598905U (en) * | 2017-12-06 | 2018-07-10 | 江苏恒立液压股份有限公司 | The anti-loosening device of piston of oil cylinder |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2021173328A (en) * | 2020-04-24 | 2021-11-01 | 日立Astemo株式会社 | Piston rod assembly, shock absorber, and manufacturing method of piston rod assembly |
| JP7378343B2 (en) | 2020-04-24 | 2023-11-13 | 日立Astemo株式会社 | Piston rod assembly, shock absorber and piston rod assembly manufacturing method |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191008 |
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| RJ01 | Rejection of invention patent application after publication |