CN216200429U - Structure for fastening piston body and piston rod by multiple bolts - Google Patents
Structure for fastening piston body and piston rod by multiple bolts Download PDFInfo
- Publication number
- CN216200429U CN216200429U CN202122689042.9U CN202122689042U CN216200429U CN 216200429 U CN216200429 U CN 216200429U CN 202122689042 U CN202122689042 U CN 202122689042U CN 216200429 U CN216200429 U CN 216200429U
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- piston
- piston rod
- hole
- fastening
- piston body
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Abstract
The utility model discloses a structure for fastening a piston body and a piston rod by multiple bolts, which comprises the piston body and the piston rod and is characterized in that: the piston body is provided with a central hole, the piston rod can penetrate into the central hole in a matching manner, the front end and the rear end of the piston body are respectively provided with an installation hole and a limiting hole, the installation hole, the limiting hole and the central hole are coaxially arranged, a fastening nut is arranged in the installation hole in a matching manner, the front end of the piston rod is in threaded connection with the fastening nut, the piston rod is provided with a limiting step, and the limiting step is matched with the limiting hole; the fastening nut is further provided with a circle of axially arranged bolt holes, and fastening bolts are arranged in the bolt holes. The piston rod does not need to be punched, and the overall strength of the piston rod cannot be weakened.
Description
Technical Field
The utility model relates to an improved invention in the field of pistons, in particular to an improved invention of a multi-bolt fastening piston body and a structure of a piston rod.
Background
In the prior art, being connected between piston rod and the piston body, generally need punch the design on the piston rod to in fixed the linking to each other through the fastener with the piston body, nevertheless the piston rod back of punching can lead to the bulk strength of piston rod to weaken, influences the stability of structure.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art and provide a structure for fastening a piston body and a piston rod by multiple bolts, which is reasonable in structure, stable and reliable.
In order to solve the technical problems, the utility model is realized by adopting the following technical scheme: the structure of this kind of many bolt-up piston body and piston rod, including piston body and piston rod, its characterized in that: the piston body is provided with a central hole, the piston rod can penetrate into the central hole in a matching manner, the front end and the rear end of the piston body are respectively provided with an installation hole and a limiting hole, the installation hole, the limiting hole and the central hole are coaxially arranged, a fastening nut is arranged in the installation hole in a matching manner, the front end of the piston rod is in threaded connection with the fastening nut, the piston rod is provided with a limiting step, and the limiting step is matched with the limiting hole; the fastening nut is further provided with a circle of axially arranged bolt holes, and fastening bolts are arranged in the bolt holes.
The fastening bolt is provided with a shoulder step, a flange is arranged in the bolt hole, and the flange is in limit fit with the shoulder step.
The piston body is divided into a front half piston and a rear half piston, and the front half piston and the rear half piston are in front-rear butt joint.
And a nut gasket is arranged between the fastening nut and the bottom surface of the mounting hole.
Compared with other piston fastening schemes, the improved structure for fastening the piston body and the piston rod by the multi-bolt does not need to carry out punching design on the piston rod, and does not weaken the overall strength of the piston rod; meanwhile, the special design of the fastening nut and the fastening bolt prevents a single fastening bolt from entering a cylinder slideway when being loosened, so that the structural failure of a cylinder or a piston is avoided.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a structural view of a fastening nut of the present invention.
Fig. 3 is a right side view of fig. 2 of the present invention.
Detailed Description
The drawings show the structure of the utility model, and the details thereof are further described below with reference to the drawings. The structure for fastening the piston body 1 and the piston rod 2 by the multi-bolt comprises the piston body 1 and the piston rod 2, wherein a central hole 3 is formed in the piston body 1, the piston rod 2 can penetrate into the central hole 3 in a matching mode, a mounting hole 4 and a limiting hole 5 are respectively formed in the front end and the rear end of the piston body 1, the mounting hole 4, the limiting hole 5 and the central hole 3 are coaxially arranged, the inner diameters of the mounting hole 4 and the limiting hole 5 are larger than the inner diameter of the central hole 3, a fastening nut 6 is arranged in the mounting hole 4 in a matching mode, the front end of the piston rod 2 is in threaded connection with the fastening nut 6, external threads are formed in the front end of the corresponding piston rod 2, a limiting step 7 is arranged on the piston rod 2, and the limiting step 7 is matched with the limiting hole 5; the fastening nut 6 is further provided with a circle of axially arranged bolt holes 8, and fastening bolts 9 are arranged in the bolt holes 8.
In a further improved embodiment, the fastening bolt 9 is provided with a shoulder 91, and the bolt hole 8 is provided with a flange 81, and the flange 81 is in limit fit with the shoulder 91. Namely, the bolt hole 8 is divided into a screwing area and a threaded connection area by a flange, the external diameter of the screwing part of the fastening bolt 9 is smaller than that of the thread section, the screwing part is positioned in the screwing area, and the thread section is limited in the threaded connection area, so that the single fastening bolt 9 is prevented from entering a cylinder slideway when being loosened, and the structural failure of a cylinder or a piston is prevented.
As a further improved embodiment, the piston body 1 is divided into a front half piston 11 and a rear half piston 12, the front half piston 11 and the rear half piston 12 are in front-rear butt joint without relative rotation, and the split butt joint structure facilitates the arrangement of a cavity in the piston body 1, thereby reducing the weight of the piston body 1 and reducing the manufacturing cost.
As a more improved specific embodiment, a nut washer 61 is provided between the fastening nut 6 and the bottom surface of the mounting hole 4, so as to further enhance the anti-slip performance of the fastening nut 6.
In the installation process of the utility model, a front half piston and a rear half piston are mutually butted, a piston rod 2 penetrates through a central hole 3 to finish pre-installation, a limit step 7 is positioned in a limit hole 5 at the moment, the front end of the piston rod 2 is positioned in an installation hole 4, then a nut gasket is placed in the installation hole 4, then a fastening nut 6 is screwed up with the piston rod 2 through threads, and at the moment, the front half piston body 1, the rear half piston body 1 and the piston rod 2 finish primary fastening; after the preliminary inspection, the fastening bolts 9 are tightened according to the specified torque, and after the fastening bolts 9 are sequentially tightened according to the specified requirements, an axial acting force is provided for the fastening nuts 6, so that the piston body 1 and the piston rod 2 reach the fastening requirements, and the installation is finished.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. The utility model provides a structure of many bolt fastening piston body and piston rod, includes piston body and piston rod, its characterized in that: the piston body is provided with a central hole, the piston rod can penetrate into the central hole in a matching manner, the front end and the rear end of the piston body are respectively provided with an installation hole and a limiting hole, the installation hole, the limiting hole and the central hole are coaxially arranged, a fastening nut is arranged in the installation hole in a matching manner, the front end of the piston rod is in threaded connection with the fastening nut, the piston rod is provided with a limiting step, and the limiting step is matched with the limiting hole; the fastening nut is further provided with a circle of axially arranged bolt holes, and fastening bolts are arranged in the bolt holes.
2. The structure of a multi-bolt fastened piston body and piston rod according to claim 1, characterized in that: the fastening bolt is provided with a shoulder step, a flange is arranged in the bolt hole, and the flange is in limit fit with the shoulder step.
3. The structure of a multi-bolt fastened piston body and piston rod according to claim 1, characterized in that: the piston body is divided into a front half piston and a rear half piston, and the front half piston and the rear half piston are in front-rear butt joint.
4. The structure of a multi-bolt fastened piston body and piston rod according to claim 1, characterized in that: and a nut gasket is arranged between the fastening nut and the bottom surface of the mounting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122689042.9U CN216200429U (en) | 2021-11-05 | 2021-11-05 | Structure for fastening piston body and piston rod by multiple bolts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122689042.9U CN216200429U (en) | 2021-11-05 | 2021-11-05 | Structure for fastening piston body and piston rod by multiple bolts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216200429U true CN216200429U (en) | 2022-04-05 |
Family
ID=80902447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122689042.9U Active CN216200429U (en) | 2021-11-05 | 2021-11-05 | Structure for fastening piston body and piston rod by multiple bolts |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216200429U (en) |
-
2021
- 2021-11-05 CN CN202122689042.9U patent/CN216200429U/en active Active
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