CN209959610U - Oil cylinder with anti-loosening piston - Google Patents
Oil cylinder with anti-loosening piston Download PDFInfo
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- CN209959610U CN209959610U CN201920524576.6U CN201920524576U CN209959610U CN 209959610 U CN209959610 U CN 209959610U CN 201920524576 U CN201920524576 U CN 201920524576U CN 209959610 U CN209959610 U CN 209959610U
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- locking block
- locking
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Abstract
The utility model discloses a locking hydro-cylinder of piston, including establishing the piston rod in the cylinder and connecting the piston on the piston rod, the mounting groove has in the piston rod, be equipped with locking Assembly in the mounting groove, locking Assembly and piston contact are with axial locking piston, locking Assembly is including laminating last locking block and lower locking block on the mounting inslot wall and establishing the well locking block in the middle of last locking block and lower locking block, connect through the setting element between piston and the piston rod, be connected with the pull rod on the well locking block and the pull rod passes last locking block and lower locking block, locking block axial displacement drives the locking block and makes the setting element compress tightly or loosen the piston with lower locking block radial movement in the pull rod pulling. In this way, the utility model discloses the locking hydro-cylinder of piston can effectively solve the not hard up problem of hydro-cylinder piston, has reduced hydraulic cylinder's inefficacy risk to simple structure, easy dismounting.
Description
Technical Field
The utility model relates to a hydro-cylinder field especially relates to a locking hydro-cylinder of piston.
Background
The condition of internal leakage of the hydraulic cylinder is often caused due to the high working pressure of the hydraulic cylinder and the actual severe working conditions, which is one of the most common failure modes of the hydraulic cylinder, and the looseness of a piston matched with a piston rod is the most common reason of the internal leakage of the hydraulic cylinder.
In the existing hydraulic cylinder design, the common anti-loosening structure of the threaded piston matched with the piston rod is as follows: after the piston is in threaded fit on the piston rod, threads at the matched part of the piston and the piston rod are damaged by an electric drill, and then a set screw is screwed in to achieve the purpose of looseness prevention, so that the matching quality between the piston and the piston rod is inevitably influenced, and the dynamic sealing effect of the piston is further influenced; secondly, when scrap iron generated by destroying the matched threads is not cleaned completely, the oil cylinder is pulled or the sealing ring is damaged to lose effectiveness; and finally, when the hydraulic oil cylinder needs to be disassembled, the piston is difficult to disassemble.
Therefore, the locking mode of the set screw is adopted, so that the disassembling difficulty of the hydraulic oil cylinder is increased, and the failure risk of the hydraulic oil cylinder is greatly increased.
Disclosure of Invention
The utility model discloses the main technical problem who solves provides a locking hydro-cylinder of piston, can effectively solve the not hard up problem of hydro-cylinder piston, reduced hydraulic cylinder's inefficacy risk to simple structure, easy dismounting.
In order to solve the technical problem, the utility model discloses a technical scheme be: the utility model provides a locking hydro-cylinder of piston, including establishing the piston rod in the cylinder and connecting the piston on the piston rod, the mounting groove has in the piston rod, be equipped with locking Assembly in the mounting groove, locking Assembly and piston contact are with axial locking piston, locking Assembly is including laminating last locking piece on the mounting groove inner wall and lower locking piece and establish the well locking piece in the middle of locking piece and lower locking piece, connect through the setting element between piston and the piston rod, be connected with the pull rod on the well locking piece and the pull rod passes and lock piece and lower locking piece, locking piece axial displacement drives in the pull rod pulling and goes up the locking piece and make the setting element compress tightly or loosen the piston with lower locking piece radial movement.
In a preferred embodiment of the present invention, the middle locking block, the upper locking block and the lower locking block are provided with a matching inclined surface, and the axial movement of the middle locking block pushes the upper locking block and the lower locking block to move radially through the inclined surface.
In a preferred embodiment of the present invention, the middle locking block has a frustum pyramid structure.
In a preferred embodiment of the present invention, the piston is further provided with a locking groove engaged with the positioning member, and the positioning member is pressed into the locking groove to bite the piston.
In a preferred embodiment of the present invention, the pull rod is screwed into the middle locking block, and the depth of the pull rod screwed into the middle locking block adjusts the locking force between the middle locking block and the upper and lower locking blocks.
In a preferred embodiment of the present invention, the front end of the pull rod is further hinged with a cam wrench, and the cam wrench is rotated and pressed on the upper locking block or the lower locking block to lock the locking assembly.
In a preferred embodiment of the present invention, the positioning member is a fastening pin, and the fastening pins are coaxially and symmetrically distributed.
The utility model has the advantages that: the utility model discloses the locking hydro-cylinder of piston can effectively solve the not hard up problem of hydro-cylinder piston, has reduced hydraulic cylinder's inefficacy risk to simple structure, easy dismounting.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work, wherein:
fig. 1 is a schematic view of a locking state of the piston anti-loosening oil cylinder of the present invention;
FIG. 2 is a schematic structural view of the locking assembly of FIG. 1 in a locked state;
FIG. 3 is a schematic structural view of the locking assembly of FIG. 1 in an unlocked state;
FIG. 4 is a schematic view of a portion of the structure of FIG. 2;
the parts in the drawings are numbered as follows: 1. the cylinder barrel, 2, a piston rod, 3, a piston, 4, a mounting groove, 5, a locking assembly, 51, an upper locking block, 52, a lower locking block, 53, a middle locking block, 54, a positioning piece, 55, a pull rod, 56, an inclined plane, 57, a locking groove, 58 and a cam wrench.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1, an oil cylinder with a piston preventing loose comprises a piston rod 2 arranged in a cylinder barrel 1 and a piston 3 connected to the piston rod 2, wherein an installation groove 4 is formed in the piston rod 2, a locking assembly 5 is arranged in the installation groove 4, the locking assembly 5 is in contact with the piston 3 to lock the piston 3 to prevent relative axial movement between the piston 3 and the piston rod 2, the locking assembly 5 comprises an upper locking block 51 and a lower locking block 52 attached to the inner wall of the installation groove 4 and a middle locking block 53 arranged between the upper locking block 51 and the lower locking block 52, the piston 3 and the piston rod 2 are connected through a positioning piece 54, the middle locking block 53 is connected with a pull rod 55, the pull rod 55 penetrates through the upper locking block 51 and the lower locking block 52, and the pull rod 55 pulls the middle locking block 53 to move axially to drive the upper locking block 51 and the lower locking block 52 to move radially to press the positioning piece 54 or release the piston.
In addition, the middle locking block 53, the upper locking block 51 and the lower locking block 52 are provided with matched inclined surfaces 56, and the middle locking block 53 moves axially to push the upper locking block 51 and the lower locking block 52 to move radially through the inclined surfaces.
In addition, the middle locking block 53 has a prismoid structure.
In addition, the piston 3 is further provided with a locking groove 57 which is matched with the positioning piece 54, the positioning piece 54 is pressed into the locking groove 57 to clamp the piston, and the upper locking block 51 and the lower locking block 52 are pushed by the middle locking block 53 to make the positioning piece 54 tightly pressed into the locking groove 57, so that the piston 3 is effectively prevented from loosening.
Further, a pull rod 55 is screwed to the middle locking block 53, and the depth of screwing the pull rod 55 into the middle locking block 53 adjusts the locking force of the middle locking block 53 with the upper locking block 52 and the lower locking block 51. The pull rod 55 and the middle locking block 53 are in fit connection through M2 × P2 (usually, the screw pitch P2= 1/1.5/2).
In addition, the front end of the pull rod 55 is hinged with a cam wrench 58, and the cam wrench 58 is pressed on the upper locking block 51 or the lower locking block 52 in a rotating mode to lock the locking assembly 5.
In addition, the positioning members 54 are set pins which are symmetrically distributed at 180 degrees coaxially, so that the locking force is symmetrically distributed to play a double locking role, and the number of the set pins is 2, 4, 6 or more. The piston rod 2 and the piston 3 are in fit connection through M1 xP 1 (the common screw pitch P1= 1/1.5/2); then two radial fastening pins are arranged, the fastening pins and the pin holes are in clearance fit, and finally the locking component 5 is arranged in the mounting groove 4.
Be different from prior art, the utility model discloses the locking hydro-cylinder of piston can effectively solve the not hard up problem of hydro-cylinder piston, has reduced hydraulic cylinder's inefficacy risk to simple structure, easy dismounting.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all of which utilize the equivalent structure or equivalent flow transformation made by the content of the specification of the present invention, or directly or indirectly applied to other related technical fields, all included in the same way in the patent protection scope of the present invention.
Claims (7)
1. The utility model provides a locking hydro-cylinder of piston, is including establishing the piston rod in the cylinder and connecting the piston on the piston rod, a serial communication port, the mounting groove has in the piston rod, be equipped with locking Assembly in the mounting groove, locking Assembly and piston contact are with axial locking piston, locking Assembly is including laminating last locking block on the mounting groove inner wall and lower locking block and establish the well locking block in the middle of last locking block and lower locking block, connect through a plurality of setting elements between piston and the piston rod, be connected with the pull rod on the well locking block and the pull rod passes last locking block and lower locking block, locking block axial displacement drives locking block and lower locking block radial movement makes the setting element compress tightly or loosen the piston in the pull rod pulling.
2. The piston anti-loosening oil cylinder as claimed in claim 1, wherein the middle locking block, the upper locking block and the lower locking block are provided with matching inclined surfaces, and the axial movement of the middle locking block pushes the upper locking block and the lower locking block to move radially through the inclined surfaces.
3. The piston anti-loosening cylinder as claimed in claim 2, wherein the middle locking block is of a prismoid structure.
4. The piston locking cylinder as claimed in claim 3, wherein the piston is further provided with a locking groove engaged with the positioning member, and the positioning member is pressed into the locking groove to bite the piston.
5. The piston anti-loosening oil cylinder as claimed in any one of claims 1 to 4, wherein the pull rod is screwed on the middle locking block, and the depth of screwing the pull rod into the middle locking block adjusts the locking force of the middle locking block and the upper and lower locking blocks.
6. The piston anti-loosening oil cylinder as claimed in claim 5, wherein a cam wrench is hinged to the front end of the pull rod, and the cam wrench is pressed on the upper locking block or the lower locking block in a rotating manner to lock the locking assembly.
7. The piston anti-loosening oil cylinder as claimed in claim 6, wherein the positioning member is a fastening pin, and the fastening pins are coaxially and symmetrically distributed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920524576.6U CN209959610U (en) | 2019-04-18 | 2019-04-18 | Oil cylinder with anti-loosening piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920524576.6U CN209959610U (en) | 2019-04-18 | 2019-04-18 | Oil cylinder with anti-loosening piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209959610U true CN209959610U (en) | 2020-01-17 |
Family
ID=69241450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920524576.6U Active CN209959610U (en) | 2019-04-18 | 2019-04-18 | Oil cylinder with anti-loosening piston |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209959610U (en) |
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2019
- 2019-04-18 CN CN201920524576.6U patent/CN209959610U/en active Active
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