CN215486935U - Anti-loosening structure for hydraulic cylinder piston - Google Patents
Anti-loosening structure for hydraulic cylinder piston Download PDFInfo
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- CN215486935U CN215486935U CN202122074266.9U CN202122074266U CN215486935U CN 215486935 U CN215486935 U CN 215486935U CN 202122074266 U CN202122074266 U CN 202122074266U CN 215486935 U CN215486935 U CN 215486935U
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- nut
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- bending ring
- hydraulic cylinder
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- 238000005452 bending Methods 0.000 claims abstract description 25
- 238000004080 punching Methods 0.000 claims description 8
- 238000003801 milling Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 238000001125 extrusion Methods 0.000 abstract description 3
- 238000003754 machining Methods 0.000 abstract 1
- 230000005012 migration Effects 0.000 abstract 1
- 238000013508 migration Methods 0.000 abstract 1
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000002265 prevention Effects 0.000 description 2
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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- Pistons, Piston Rings, And Cylinders (AREA)
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Abstract
The utility model belongs to the technical field of hydraulic cylinders, and particularly relates to an anti-loosening structure for a piston of a hydraulic cylinder, which comprises a piston arranged on a piston rod and a nut for axially limiting the piston, wherein the end surface of the piston is provided with a bending ring matched with the nut, the inner diameter of the bending ring is slightly larger than the outer diameter of the nut for axially limiting the piston, and planes or grooves are uniformly distributed on the outer circumferential surface of the nut; the pitch P1 of the piston is greater than the pitch P2 of the nut. Through with piston end face machining bending ring, set up plane or recess with the nut excircle after bending the bending ring and laminate mutually and carry out locking, the pitch of piston leads to the migration distance different with the pitch of nut, makes the terminal surface extrusion more and more big between piston and nut, reaches locking effect.
Description
Technical Field
The utility model belongs to the technical field of hydraulic cylinders, and particularly relates to an anti-loosening structure for a piston of a hydraulic cylinder.
Background
At present, the piston, the nut and the piston rod of a hydraulic cylinder in the industry are mostly fixed by adopting threaded connection, the piston and the nut are prevented from loosening by screwing a set screw and then punching a point, and the whole machine is often accompanied by severe vibration in the working process of a main machine, and the oil cylinder bears frequent reciprocating high-pressure impact. The set screw is easy to loosen and withdraw, then the piston and the nut are loosened, the threads of the piston and the nut lose efficacy over time, and the hydraulic cylinder fails due to the faults of cylinder pulling, internal leakage, falling off of the piston and the nut, and the whole machine cannot work, so that the inconvenience is brought to the construction work, and even safety accidents are caused in serious cases.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model provides the anti-loosening structure for the piston of the hydraulic cylinder, which is used for bending the bending ring of the piston to fix the piston and the nut together so as to achieve the anti-loosening purpose.
The utility model is realized by the following technical scheme: a kind of anti-loose structure used for piston of the fluid cylinder, including piston mounted on piston rod and nut to the piston carry on the axial spacing, the end of the piston has impact curved ring cooperating with nut, the bore of the impact curved ring is slightly greater than the external diameter to the nut to carry on the axial spacing to the piston, equipartition has level or recess on the outer periphery of the nut; the pitch P1 of the piston is greater than the pitch P2 of the nut.
Furthermore, a plurality of mounting holes I are formed in the end face of the piston, which is provided with the stamping and bending ring; the nut is provided with a plurality of mounting holes II along the axial direction.
Further, the flat or groove on the outer circumferential surface of the nut is formed by milling.
The utility model has the beneficial effects that: the punching and bending ring is processed on the end face of the piston, and the punching and bending ring is attached to the plane or the groove arranged on the outer circle of the nut for locking after being punched and bent. The different displacement distance that leads to of the pitch of piston and the pitch of nut makes the terminal surface extrusion between piston and nut bigger and bigger, reaches locking effect. The piston and the nut only need to be screwed down by small moment, the reliable connection of the piston, the nut and the piston rod can be realized through bending and looseness prevention, the looseness prevention effect is good, special large-torque special equipment is not needed in assembly operation, and the assembly, the disassembly and the batch production are convenient. The application also has the advantages of simple structure, convenience in processing, high reliability and the like.
Drawings
FIG. 1 is a state diagram of the present invention in use;
FIG. 2 is a cross-sectional view of the piston of the present invention;
FIG. 3 is a right side view of FIG. 2;
FIG. 4 is a cross-sectional view of the nut of the present invention;
FIG. 5 is a right side view of FIG. 4;
in the figure, 1, a piston, 1-1, a punching and bending ring, 1-2, mounting holes I and 2, a nut, 2-1, mounting holes II and 3 and a piston rod.
Detailed Description
The utility model is further illustrated below with reference to the figures and examples.
As shown in fig. 1, the anti-loose structure for the piston of the hydraulic cylinder comprises a piston 1 arranged on a piston rod 3 and a nut 2 for axially limiting the piston 1. As shown in fig. 1 to 3, the end face of the piston 1 is provided with a bending ring 1-1 which is matched with the nut 2, and the thickness and the protruding length of the bending ring 1-1 can be set according to requirements. The inner diameter of the bending ring 1-1 is slightly larger than the outer diameter of the nut 2 which axially limits the piston 1, so that the nut 2 can be screwed into the bending ring 1-1 on the piston rod 3. Planes or grooves are uniformly distributed on the outer circumferential surface of the nut 2, and the planes or grooves on the outer circumferential surface of the nut 2 are formed by milling. The plane or the groove of the nut 2 is used for being matched with the punching and bending ring 1-1, and the punching and bending ring 1-1 and the nut 2 form limiting in the circumferential direction after being punched and bent. As shown in fig. 5, the outer circumferential surface of the nut 2 is uniformly provided with planes, when in use, the piston 1 is fixed on the piston rod 3, then the nut 2 is fixed on the piston rod 3, and the bending ring 1-1 is attached to the planes on the outer circumferential surface of the nut 2 after bending, so that the nut 2 and the piston 1 cannot rotate relatively.
The utility model provides a pitch P1 of piston 1 is greater than the pitch P2 of nut 2, and if piston 1 if a pitch of moving backward, nut 2 moves backward a pitch simultaneously, and piston 1 displacement is greater than nut 2 displacement, causes the mutual extrusion between piston 1, the nut 2 more and more serious, and nut 2 is more and more big to piston 1's effort, prevents the not hard up of piston 1 screw thread. Meanwhile, the nut 2 is restrained by the bending ring 1-1, and the nut 2 cannot be withdrawn, so that the looseness and the failure of the piston 1 and the nut 2 are finally prevented, the reliability of the product is improved, and the service life of the product is prolonged. The piston 1 and the nut 2 can adopt different thread pitch combinations or thread forms with different screw directions.
As shown in figures 2 and 3, the piston 1 is provided with a plurality of mounting holes I1-2 on the end surface provided with the bending ring 1-1, and the piston 1 is screwed conveniently by matching and rotating a tool with the mounting holes I1-2. As shown in FIGS. 4 and 5, the nut 2 is provided with a plurality of mounting holes II 2-1 along the axial direction, and the nut 2 is screwed by means of the tool which is matched with the mounting holes II 2-1 to rotate.
Claims (3)
1. The utility model provides a locking structure for pneumatic cylinder piston which characterized in that: the piston type axial limiting device comprises a piston (1) arranged on a piston rod (3) and a nut (2) for axially limiting the piston (1), wherein a punching and bending ring (1-1) matched with the nut (2) is arranged on the end surface of the piston (1), the inner diameter of the punching and bending ring (1-1) is slightly larger than the outer diameter of the nut (2) for axially limiting the piston (1), and planes or grooves are uniformly distributed on the outer circumferential surface of the nut (2); the pitch P1 of the piston (1) is larger than the pitch P2 of the nut (2).
2. The anti-loosening structure for the piston of the hydraulic cylinder as claimed in claim 1, wherein: a plurality of mounting holes I (1-2) are formed in the end face, provided with the bending ring (1-1), of the piston (1); the nut (2) is provided with a plurality of mounting holes II (2-1) along the axial direction.
3. The anti-loosening structure for the piston of the hydraulic cylinder as claimed in claim 1, wherein: the plane or the groove on the outer circumferential surface of the nut (2) is formed by milling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122074266.9U CN215486935U (en) | 2021-08-31 | 2021-08-31 | Anti-loosening structure for hydraulic cylinder piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122074266.9U CN215486935U (en) | 2021-08-31 | 2021-08-31 | Anti-loosening structure for hydraulic cylinder piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215486935U true CN215486935U (en) | 2022-01-11 |
Family
ID=79766191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122074266.9U Active CN215486935U (en) | 2021-08-31 | 2021-08-31 | Anti-loosening structure for hydraulic cylinder piston |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215486935U (en) |
-
2021
- 2021-08-31 CN CN202122074266.9U patent/CN215486935U/en active Active
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