CN215444600U - Piston rod assembly of ultrathin cylinder - Google Patents
Piston rod assembly of ultrathin cylinder Download PDFInfo
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- CN215444600U CN215444600U CN202120240766.2U CN202120240766U CN215444600U CN 215444600 U CN215444600 U CN 215444600U CN 202120240766 U CN202120240766 U CN 202120240766U CN 215444600 U CN215444600 U CN 215444600U
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- piston rod
- piston
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- chamfer
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Abstract
The utility model discloses a piston rod assembly of an ultrathin cylinder, which comprises a piston, a piston rod and a connecting piece, wherein the piston is provided with a piston central through hole, one end of the piston central through hole is provided with a chamfer or an annular groove; the piston rod assembly of the utility model ensures the coaxiality of the piston and the piston rod, has long service life and good sealing performance, and is suitable for automatic production.
Description
Technical Field
The utility model belongs to the technical field of cylinders, and particularly relates to a piston rod assembly of an ultrathin cylinder.
Background
The ultra-thin cylinder is a cylindrical metal work in which a piston is guided to perform linear reciprocating motion.
At present, a piston and a piston rod of an ultrathin cylinder are fixedly connected through threads, threads need to be machined in a production process, the machining process is complex, manual assembly is needed in assembly, the efficiency is extremely low, and automatic assembly is difficult to realize; furthermore, the threaded connection has a gap, so that the piston and the piston rod are not concentric, the piston moves in the cylinder body to generate radial resistance, the lateral stress of the piston rod is large, the operation of the cylinder is not smooth, the phenomena of crawling, large starting air pressure and the like are caused, the service life is greatly shortened, and in the using process, threads are easy to withdraw and loosen under the stress action, so that the piston rod flies out, and potential safety hazards exist, therefore, a mode and a method are required to be found for improvement.
SUMMERY OF THE UTILITY MODEL
In view of the above, there is a need to overcome at least one of the above-mentioned deficiencies in the prior art. The utility model provides a piston rod assembly of an ultrathin cylinder, which comprises a piston, wherein the piston is provided with a piston central through hole, one end of the piston central through hole is provided with a chamfer or an annular groove; the piston rod is provided with a piston rod body and an installation section, one end of the installation section is fixed on the end face of the piston rod body, and the aperture of the installation section is smaller than that of the piston rod body, the outer diameter of the mounting section is matched with the aperture of the central through hole of the piston, the mounting section is mounted in the central through hole of the piston and is in interference fit with the central through hole of the piston, the other end of the mounting section is provided with a rod protruding structure matched with the chamfer or the annular groove, the other end of the mounting section extends into the central through hole of the piston and then is fixedly mounted in the central through hole of the piston in a mode of forming a pressure variable (namely, a rod protruding structure) matched with the chamfer or the annular groove through rotary riveting.
According to the prior art in the background of the patent, the piston and the piston rod of the existing ultrathin cylinder are fixedly connected through threads, the piston and the piston rod need to be assembled manually, the efficiency is extremely low, and automatic assembly is difficult to realize; furthermore, the threaded connection has a gap, so that the piston and the piston rod are not concentric, and the thread is easy to withdraw and loosen under the stress action in the use process; according to the piston rod assembly of the ultrathin cylinder disclosed by the utility model, after the installation section of the piston rod extends into the central through hole of the piston, the piston rod is deformed in a longitudinal and transverse stress manner through the rotary riveting equipment and the special rotary riveting die, so that the installation section is deformed to form an extrusion variable which is matched and sealed with the chamfer at one end of the piston, and the installation section is not required to be fixedly connected by threads, thereby ensuring the coaxiality of the piston and the piston rod, being long in service life, realizing automatic production and greatly reducing the labor cost.
In addition, the piston rod assembly of the ultrathin cylinder disclosed by the utility model also has the following additional technical characteristics:
further, the other end of the mounting section, which is far away from the piston rod body, is provided with a piston rod center hole.
The design of the central hole of the piston rod mainly has the function of eliminating the longitudinal stress of the piston rod, so that the transverse stress is increased, and the sealing performance of the piston and the piston rod is ensured.
Further, the piston rod is a rod made of 45# steel.
Further, one end of the piston central through hole is provided with the chamfer, and the chamfer is a 45-degree chamfer.
Furthermore, the end face of the other end of the mounting section is coplanar with the outer side edge of the chamfer.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic structural view of a piston rod assembly of an ultra-thin cylinder in an embodiment of the present invention;
FIG. 2 is a schematic view of the piston structure in an embodiment of the present invention; and
fig. 3 is a schematic view of the structure of the piston rod in the embodiment of the present invention.
Wherein, 1 is the piston, 2 is piston center through-hole, 3 is the chamfer, 4 is the piston rod, 5 is the installation section, 6 is the piston rod centre bore.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the utility model.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "lateral", "vertical", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, are used only for convenience in describing the present invention and for simplification of description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "coupled," "communicating," "connected," and "coupled" are to be construed broadly and may, for example, be fixedly connected, integrally connected, or detachably connected; may be communication within two elements; can be directly connected or indirectly connected through an intermediate medium; "mating" may be a surface-to-surface mating, a point-to-surface or line-to-surface mating, and also includes a hole axis mating, and it is obvious to those skilled in the art that the above terms have specific meanings in the present invention.
The utility model provides a piston rod assembly of an ultrathin cylinder, which is characterized in that after an installation section of a piston rod extends into a central through hole of a piston, the piston rod is deformed in a longitudinal and transverse stress manner through rotary riveting equipment and a special rotary riveting die, the installation section is deformed to form an extrusion variable which is matched and sealed with a chamfer at one end of the piston, the installation section is not required to be connected and fixed by threads, the coaxiality of the piston and the piston rod is ensured, the service life is long, automatic production can be realized, and the labor cost is greatly reduced.
The utility model will now be described with reference to the accompanying drawings, in which fig. 1 is a schematic view of the construction of a piston-piston rod assembly of an ultra-thin cylinder in an embodiment of the utility model; FIG. 2 is a schematic view of the piston structure in an embodiment of the present invention; and fig. 3 is a schematic view of the structure of the piston rod in an embodiment of the utility model.
As shown in fig. 1 to 3, according to an embodiment of the present invention, a piston rod assembly of a slim cylinder includes a piston 1, the piston 1 is provided with a piston central through hole 2, and one end of the piston central through hole 2 is provided with a chamfer 3 or an annular groove; a piston rod is arranged on the piston rod, the piston rod 4 is provided with a piston rod body and an installation section 5, one end of the installation section is fixed on the end face of the piston rod body, and the aperture of the installation section is smaller than that of the piston rod body, the outer diameter of the mounting section 5 is tightly matched with the aperture of the piston central through hole 2, the mounting section 5 is mounted in the piston central through hole 2 and is in interference fit with the piston central through hole 2, the other end of the mounting section 5 is provided with a rod protruding structure matched with the chamfer or the annular groove, the other end of the mounting section 5 extends into the piston central through hole 2 and then is fixedly mounted in the piston central through hole 2 in a pressure variable mode matched with the chamfer 3 through rotary riveting.
According to the prior art in the background of the patent, the piston 1 and the piston rod 4 of the existing ultrathin cylinder are fixedly connected through threads, the piston 1 and the piston rod 4 need to be assembled manually, the efficiency is extremely low, and automatic assembly is difficult to realize; furthermore, the threaded connection has a gap, so that the piston 1 and the piston rod 4 are not concentric, and the thread is easy to withdraw and loosen under the stress action in the use process; according to the piston rod assembly of the ultrathin cylinder disclosed by the utility model, the end part of the piston rod central hole 6 far away from the piston rod body is provided with the taper matched with the spin riveting edge, after the mounting section 5 of the piston rod 4 extends into the piston central through hole 2, the piston rod 4 is deformed in a longitudinal and transverse stress manner through the rotary riveting equipment and a special rotary riveting die, so that the mounting section 5 is deformed to form an extrusion variable matched and sealed with the chamfer 3 at one end of the piston 1, the connection and fixation of threads are not needed, the coaxiality of the piston 1 and the piston rod 4 is ensured, the service life is long, the automatic production can be realized, and the labor cost is greatly reduced.
In addition, the piston rod assembly of the ultrathin cylinder disclosed by the utility model also has the following additional technical characteristics:
according to some embodiments of the utility model the other end of the mounting section 5 remote from the piston rod body has a piston rod centre hole 6.
The design of the piston rod center hole 6 mainly aims at eliminating the longitudinal stress of the piston rod 4, so that the transverse stress is increased, and the sealing performance of the piston and the piston rod is ensured.
According to some embodiments of the utility model, the piston rod 4 is a rod made of 45# steel.
According to some embodiments of the utility model, one end of the piston central through hole 2 has the chamfer, which is a 45 ° chamfer.
According to some embodiments of the utility model, the end surface of the other end of the mounting section 5 is coplanar with the outer side of the chamfer.
According to some embodiments of the utility model, the outer circumferential surface of the piston 1 is provided with a seal ring groove.
Any reference to "one embodiment," "an embodiment," "example embodiment," etc., means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the utility model. This schematic representation in various places throughout this specification does not necessarily refer to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the purview of one skilled in the art to effect such feature, structure, or characteristic in connection with other ones of the embodiments.
While specific embodiments of the utility model have been described in detail with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this invention. In particular, reasonable variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the foregoing disclosure, the drawings and the appended claims without departing from the spirit of the utility model. Except variations and modifications in the component parts and/or arrangements, the scope of which is defined by the appended claims and equivalents thereof.
Claims (5)
1. A piston rod assembly for an ultra-thin cylinder, comprising:
the piston is provided with a piston central through hole, and one end of the piston central through hole is provided with a chamfer or an annular groove;
the piston rod, the piston rod has the piston rod body and one end is fixed on the piston rod body terminal surface and the aperture is less than the installation section in piston rod body aperture, the installation section external diameter with piston center through-hole aperture phase-match, the installation section is installed in the piston center through-hole and with piston center through-hole interference fit, the other end of installation section have with chamfer or annular groove matched with pole protrusion structure.
2. The piston rod assembly of the ultra-thin cylinder as recited in claim 1, wherein the other end of the mounting section away from the piston rod body has a piston rod center hole.
3. The piston rod assembly of an ultra-thin cylinder as claimed in claim 1, wherein the piston rod is a rod made of 45# steel.
4. The piston rod assembly of an ultra-thin cylinder as claimed in claim 1, wherein one end of the piston center through hole has the chamfer, and the chamfer is a 45 ° chamfer.
5. The piston rod assembly of the ultra-thin cylinder as claimed in claim 4, wherein the other end face of the mounting section is coplanar with the outer side of the chamfer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120240766.2U CN215444600U (en) | 2021-01-28 | 2021-01-28 | Piston rod assembly of ultrathin cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120240766.2U CN215444600U (en) | 2021-01-28 | 2021-01-28 | Piston rod assembly of ultrathin cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215444600U true CN215444600U (en) | 2022-01-07 |
Family
ID=79701232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120240766.2U Active CN215444600U (en) | 2021-01-28 | 2021-01-28 | Piston rod assembly of ultrathin cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215444600U (en) |
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2021
- 2021-01-28 CN CN202120240766.2U patent/CN215444600U/en active Active
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