CN221347837U - Connecting structure of piston rod - Google Patents
Connecting structure of piston rod Download PDFInfo
- Publication number
- CN221347837U CN221347837U CN202323423052.3U CN202323423052U CN221347837U CN 221347837 U CN221347837 U CN 221347837U CN 202323423052 U CN202323423052 U CN 202323423052U CN 221347837 U CN221347837 U CN 221347837U
- Authority
- CN
- China
- Prior art keywords
- piston rod
- elastic piece
- cross head
- back cap
- utility
- 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.)
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Links
- 229910000639 Spring steel Inorganic materials 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 239000013013 elastic material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Abstract
The utility model discloses a connecting structure of a piston rod, which comprises a piston rod, wherein the end part of the piston rod is inserted into a cross head, a back cap is assembled at the joint of the piston rod and the cross head, an assembling groove is formed in the back cap, and an elastic piece is assembled in the assembling groove. The elastic piece is additionally arranged in the back cap for fixing the piston rod, the fatigue strength of the thread of the piston rod is improved through the arranged elastic piece, fatigue fracture of the thread at the connecting surface can be effectively prevented, the service life of the piston rod is prolonged, the structure is simple in the practical use process, the processing and the assembly are easy, the piston rod and the cross head structure do not need to be modified, special tool mounting tools do not need to be added, and the use cost is low.
Description
Technical Field
The utility model relates to the technical field of compressor piston rods, in particular to a connecting structure of a piston rod.
Background
In a common small and medium-sized reciprocating piston compressor, the connection between a piston rod and a cross head adopts a threaded and back cap connection mode, and the structure is relatively simple and easy to disassemble. However, when the non-torque wrench is installed, an installation mode of matching the non-torque wrench with the stressing rod is adopted, proper pretightening force cannot be ensured in the installation process, and excessive fastening torque is often caused. In addition, under the condition that the perpendicularity of the cross head connecting screw thread, the end face of the back cap and the center line of the screw thread is insufficient, the fatigue strength of the screw thread of the piston rod can be greatly reduced, and the screw thread is broken at the connecting face to cause serious accidents. For this purpose, we propose a connection structure of the piston rod.
Disclosure of utility model
The present utility model is directed to a connecting structure of a piston rod, so as to solve the problems set forth in the background art.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a connection structure of piston rod, includes the piston rod, the tip of piston rod is pegged graft in the cross head, its characterized in that: the connecting part of the piston rod and the cross head is provided with a back cap, an assembling groove is formed in the back cap, and an elastic piece is assembled in the assembling groove.
Preferably, the radial cross section of the elastic piece is V-shaped.
Preferably, the bottom of the elastic piece and the bottom of the assembly groove are provided with rounding angles with the matched sizes.
Preferably, the side wall of the elastic piece is uniformly provided with weight reducing grooves.
Preferably, the elastic piece is made of spring steel materials.
Compared with the prior art, the utility model has the beneficial effects that: the utility model provides a connection structure of piston rod adds the elastic component in the back of body cap that fixes the piston rod, improves the fatigue strength of piston rod screw thread through the elastic component that sets up, can effectively prevent that the junction surface department screw thread from taking place fatigue fracture, prolongs the life of piston rod, simple structure, easy processing and assembly in actual use need not revise piston rod and cross head structure, also need not increase specialized tool mounting tool, and the cost of use is lower.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Fig. 2 is a schematic structural view of the back cap of the present utility model.
Fig. 3 is a schematic structural view of an elastic member according to the present utility model.
In the figure: 1. the device comprises a piston rod, 2, a cross head, 3, a back cap, 4, an assembly groove, 5, an elastic piece, 6 and a weight reduction groove.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.
Referring to fig. 1, 2 and 3, the present utility model provides a technical solution: the utility model provides a connection structure of piston rod, includes piston rod 1, and in piston rod 1's tip was pegged graft to cross head 2, was equipped with back of the body cap 3 between piston rod 1 and the cross head 2, and assembly groove 4 has been seted up at the top of back of the body cap 3, and assembly groove 4 is equipped with elastic component 5.
As shown in fig. 2, the size of the assembly groove 4 is matched with the size of the elastic piece 5, the radial cross section of the elastic piece 5 is in a V shape, and the fatigue strength of the connection between the piston rod 1 and the cross head 2 is increased by arranging the elastic piece 5 in the back cap 3, so that the fatigue fracture of the thread sounding at the connection surface between the back cap 3 and the cross head 2 can be effectively prevented.
The elastic member 5 is made of elastic material, and may be elastic rubber or elastic material such as spring steel.
As shown in fig. 3, the side walls of the elastic member 5 are uniformly provided with weight-reducing grooves 6 penetrating the elastic member 5, and the weight of the elastic member 5 is reduced by the provided weight-reducing grooves 6, thereby reducing the weight of the back cap 3 and improving the stability of the connection between the back cap 3 and the piston rod 1.
As shown in fig. 2, the bottom of the elastic member 5 and the fitting groove 4 are provided with rounded corners corresponding in size, and by providing the rounded corners, the elastic member 5 can better bear the pressure from the piston rod 1 during use, increasing the fatigue strength of the piston rod 1.
Claims (5)
1. The utility model provides a connection structure of piston rod, includes piston rod (1), the tip of piston rod (1) is pegged graft in cross head (2), its characterized in that: the connecting part of the piston rod (1) and the cross head (2) is provided with a back cap (3), the back cap (3) is internally provided with an assembly groove (4), and the assembly groove (4) is internally provided with an elastic piece (5).
2. A piston rod connection according to claim 1, wherein: the radial cross section of the elastic piece (5) is V-shaped.
3. A piston rod connection according to claim 1, wherein: the bottoms of the elastic piece (5) and the assembly groove (4) are provided with rounding angles with the matched sizes.
4. A piston rod connection according to claim 1, wherein: weight reducing grooves (6) are uniformly formed in the side walls of the elastic pieces (5).
5. A piston rod connection according to claim 1, wherein: the elastic piece (5) is made of spring steel materials.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221347837U true CN221347837U (en) | 2024-07-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant |