CN217300826U - Piston pin oil hole structure for piston type refrigeration compressor - Google Patents
Piston pin oil hole structure for piston type refrigeration compressor Download PDFInfo
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- CN217300826U CN217300826U CN202220396635.8U CN202220396635U CN217300826U CN 217300826 U CN217300826 U CN 217300826U CN 202220396635 U CN202220396635 U CN 202220396635U CN 217300826 U CN217300826 U CN 217300826U
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Abstract
The utility model discloses a piston pin oilhole structure for piston type refrigeration compressor, including the piston pin, the inside of piston pin is equipped with the axial oilhole, the periphery middle part of piston pin is equipped with the oil groove, the oil groove through radial oilhole with axial oilhole intercommunication, establish the inner peripheral diameter of radial oilhole is c, the biggest radial size of oilhole chamfer or radius of radial oilhole is b, the width of oil groove is a, then c is less than or equal to a, and b is less than or equal to a; the piston pin oil hole is simple in structure, the size proportional relation between the radial oil hole and the oil groove is improved, the accurate grinding processing of the outer circle of the piston pin is facilitated, and the processing precision and stability are improved; after the size of the piston pin is limited, the surface areas of the outer circles of the outer peripheries of the piston pins are symmetrically distributed, and the probability of bullet shooting is greatly reduced in the grinding process; through the arrangement of the piston pin oil hole structure, the pressure bearing area of the contact surface of the piston and the connecting rod is increased, and the abrasion of the outer circle of the piston pin and the connecting rod hole is reduced.
Description
Technical Field
The utility model relates to the compressor piston technical field, concretely relates to a piston pin oilhole structure for piston compressor.
Background
The existing piston compressor connecting rod basically comprises a big end and a small end, wherein the big end in the compressor is connected with a crank pin, and the small end is connected with a piston pin; the motor drives the rotating shaft to rotate, and then the connecting rod and the piston pin are connected with the piston to reciprocate in the cylinder, so that the working processes of compression and exhaust are completed, and in the process, the piston and the piston pin are fully lubricated.
In the piston type refrigeration compressor, in order to achieve a better lubricating effect, an oil groove and a radial oil hole are formed in the middle of a piston pin, for example, a piston pin for a compressor and a compressor with the piston pin are disclosed in 2016 of the Chinese utility model patent (publication number: CN205349658U), an axial channel which is communicated along the axial direction of the piston pin is limited in a piston pin body, the oil groove which extends along the circumferential direction of the piston pin body is arranged on the outer side wall of the piston pin body, an oil through hole which is communicated with the axial channel is formed in the bottom wall of the oil groove, and oil feeding and oil discharging of lubricating oil are completed by connecting the oil through hole and the oil groove.
The diameter and the chamfer angle of the radial oil hole in the middle of the piston pin are larger than the width of the oil groove, so that the bearing area of the contact surface of the piston pin and the connecting rod hole is reduced, and meanwhile, the surface area of the outer circle of the piston pin is asymmetrical, and the precision of fine grinding processing of the outer circle of the piston pin is influenced. In general, cylindrical grinding of a piston pin is centerless grinder machining, symmetry is affected by the size of a radial oil hole through extrusion rolling grinding, for example, the same section is not hollow, the solid part is stressed differently, and the piston pin is easy to shake slightly during extrusion grinding, so that grinding quality is unstable.
Disclosure of Invention
The utility model aims at the problem that prior art exists, a piston pin oilhole structure for piston compressor is provided.
In order to achieve the purpose, the utility model adopts the technical proposal that:
the utility model provides a piston pin oilhole structure for piston compressor, includes the piston pin, the inside of piston pin is equipped with the axial oilhole, the periphery middle part of piston pin is equipped with the oil groove, the oil groove pass through radial oilhole with axial oilhole intercommunication, establish the inner peripheral diameter of radial oilhole is c, the biggest radial dimension of oilhole chamfer or radius of radial oilhole is b, the width of oil groove is an, then c is not more than a, and b is not more than a.
The piston pin oil hole is simple in structure, the size proportional relation between the radial oil hole and the oil groove is improved, the accurate grinding processing of the outer circle of the piston pin is facilitated, and the processing precision and stability are improved; after adopting the size of this application to prescribe a limit to, the excircle surface area of piston pin periphery is the symmetric distribution, and in the grinding process, the possibility of bullet is very big reduction.
In addition, through the arrangement of the piston pin oil hole structure, the bearing area of the contact surface of the piston and the connecting rod is increased, and the abrasion of the excircle of the piston pin and the connecting rod hole is reduced.
That is to say through this piston pin oilhole structure's setting, the tip (oilhole chamfer) of radial oilhole is located the inside of oil groove, the oil groove with be smooth transition between the periphery of piston pin body, the upper and lower symmetry of oil groove, like this at the fine processing in-process of grinding, the piston pin can not produce sudden slight skew, compares current piston pin, and the emery wheel is when being close to oilhole chamfer position, and the piston pin often can take place slight shake, and this application then can not produce direct contact with the oilhole chamfer when outer circumferential surface grinds.
The piston pin processed by the structure has the advantages of higher finished product quality, higher production speed and lower processing cost.
Furthermore, the value range of a is 0.5-3 mm, and the maximum values of c and b are both less than a.
Furthermore, the depth of the oil groove is 0.25-1.5 mm.
Further, the diameter of the axial oil hole is larger than that of the radial oil hole. The axial oil hole can store a certain amount of oil and can also transmit the oil to the end part to form the lubricating effect of the end part.
Furthermore, the chamfer of the oil hole is a fillet or a chamfer angle. The oil hole chamfer is finally in a state not exceeding the maximum outer circumferential range of the oil groove.
Further, the radial oil hole is not provided with a chamfer, namely b-c.
Furthermore, a positioning pin hole is further formed in the position, close to the end portion of the piston pin, and penetrates through the axial oil hole and the piston pin in the radial direction.
Furthermore, the piston pin is sleeved in the piston and fixed through a positioning pin, a connecting rod is sleeved and connected in the middle of the piston pin, and oil holes in the connecting rod are arranged corresponding to the radial oil holes.
The locating pin hole is matched with the locating pin for use so that the locating pin hole is connected and installed in the piston, the middle part of the piston pin is connected with the connecting rod, the connecting rod drives the piston pin, namely the piston to reciprocate in the cylinder, and oil can enter the oil hole in the piston pin along the oil hole in the connecting rod to lubricate the piston pin and the piston.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the piston pin oil hole is simple in structure, the size proportional relation between the radial oil hole and the oil groove is improved, the accurate grinding processing of the outer circle of the piston pin is facilitated, and the processing precision and stability are improved; after the size of the piston pin is limited, the surface areas of the outer circles of the outer peripheries of the piston pins are symmetrically distributed, and the probability of bullet shooting is greatly reduced in the grinding process;
2. through the arrangement of the piston pin oil hole structure, the pressure bearing area of the contact surface of the piston and the connecting rod is increased, and the abrasion of the outer circle of the piston pin and the connecting rod hole is reduced.
3. The piston pin processed by the structure has higher finished product quality, higher production speed and lower processing cost.
Drawings
FIG. 1 is a schematic view of a prior art piston pin oil hole configuration;
fig. 2 is a schematic view of a piston pin oil hole structure for a piston type refrigeration compressor according to the present invention;
fig. 3 is a schematic size diagram of a piston pin oil hole structure for a piston type refrigeration compressor according to the present invention;
in the figure: 1. a piston pin; 2. an oil sump; 3. a radial oil hole; 4. chamfering the oil hole; 5. an axial oil hole; 6. a positioning pin hole.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments of 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.
In the description of the present invention, it should be noted that the terms "middle", "upper", "lower", "left", "right", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element 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.
The first embodiment is as follows:
as shown in fig. 2 and 3, the piston pin oil hole structure for the piston type refrigeration compressor comprises a piston pin 1, wherein an axial oil hole 5 is formed in the piston pin 1, an oil groove 2 is formed in the middle of the outer periphery of the piston pin 1, the oil groove 2 is communicated with the axial oil hole 5 through a radial oil hole 3, the inner peripheral diameter of the radial oil hole 3 is c, the maximum radial dimension of an oil hole chamfer 4 of the radial oil hole 3 is b, and the width of the oil groove 2 is a, so that c is less than or equal to a, and b is less than or equal to a.
The piston pin oil hole is simple in structure, the accurate grinding processing of the outer circle of the piston pin 1 is facilitated by improving the size proportional relation of the radial oil hole 3 and the oil groove 2, and the processing precision and stability are improved; after the size of the piston pin is limited, the surface areas of the outer circles of the outer peripheries of the piston pins 1 are symmetrically distributed, and the probability of bullet shooting is greatly reduced in the grinding process.
In addition, through the arrangement of the piston pin oil hole structure, the bearing area of the contact surface of the piston and the connecting rod is increased, and the abrasion of the excircle of the piston pin and the connecting rod hole is reduced.
That is to say through this piston pin oilhole structure's setting, the tip (oilhole chamfer) of radial oilhole 3 is located the inside of oil groove 2, oil groove 2 with be smooth transition between the periphery of piston pin 1 body, the upper and lower symmetry of oil groove, like this at the fine-machined in-process of grinding, the piston pin can not produce sudden slight skew, compares current piston pin, and the emery wheel is when being close to oilhole chamfer position, and the piston pin often can take place slight shake, and this application then can not produce direct contact with the oilhole chamfer when outer circumferential surface grinding.
The piston pin processed by the structure has higher finished product quality, higher production speed and lower processing cost.
Furthermore, the value range of a is 0.5-3 mm, and the maximum values of c and b are less than 3 mm.
Furthermore, the depth of the oil groove is 0.25-1.5 mm, and is basically half of the diameter of the oil groove 2.
Further, the diameter of the axial oil hole 5 is larger than the diameter of the radial oil hole 3. The axial oil hole 5 can store a certain amount of oil and can also transmit the oil to the end part to form the lubricating effect of the end part.
Further, the oil hole chamfer 4 is a chamfer angle. The oil hole chamfer 4 eventually assumes a state that does not exceed the maximum outer circumferential extent of the oil groove.
Example two:
the present embodiment provides the connection structure of the piston pin with the piston, the connecting rod, and the like in the first embodiment.
And a positioning pin hole 6 is also formed close to the end part of the piston pin 1, and the positioning pin hole 6 radially penetrates through the axial oil hole 5 and the piston pin 1.
The piston pin 1 is sleeved in the piston and fixed through a positioning pin, a connecting rod is sleeved and connected in the middle of the piston pin, and oil holes in the connecting rod are arranged corresponding to the radial oil holes 3.
The locating pin hole 6 is matched with the locating pin for use so as to be connected and installed in the piston, the middle part of the piston pin is connected with the connecting rod, the connecting rod drives the piston pin, namely the piston to reciprocate in the cylinder, and oil can enter the oil hole in the piston pin along the oil hole in the connecting rod to lubricate the piston pin and the piston.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The piston pin oil hole structure for the piston type refrigeration compressor comprises a piston pin, wherein an axial oil hole is formed in the piston pin, an oil groove is formed in the middle of the outer periphery of the piston pin and communicated with the axial oil hole through a radial oil hole, and the piston pin oil hole structure is characterized in that the inner peripheral diameter of the radial oil hole is c, the maximum radial size of an oil hole chamfer or a radius of the radial oil hole is b, the width of the oil groove is a, c is less than or equal to a, and b is less than or equal to a.
2. The piston pin oil hole structure for the piston type refrigeration compressor as claimed in claim 1, wherein a ranges from 0.5 mm to 3mm, and the maximum values of c and b are both less than a.
3. The piston pin oil hole structure for the piston type refrigeration compressor as claimed in claim 1, wherein the depth of the oil groove is 0.25-1.5 mm.
4. The piston pin oil hole structure for the piston-type refrigeration compressor as claimed in claim 1, wherein a diameter of said axial oil hole is larger than a diameter of said radial oil hole.
5. The piston pin oil hole structure for the piston type refrigeration compressor as claimed in claim 1, wherein said radial oil hole is provided without a chamfer, i.e., b ═ c.
6. The piston pin oil hole structure for the piston type refrigeration compressor as claimed in claim 1, characterized in that a positioning pin hole is further provided near an end of the piston pin, and the positioning pin hole radially penetrates the axial oil hole and the piston pin.
7. The piston pin oil hole structure for the piston type refrigeration compressor as claimed in claim 1, wherein the piston pin is sleeved in the piston and fixed by a positioning pin, a connecting rod is sleeved in the middle of the piston pin, and the oil hole on the connecting rod is arranged corresponding to the radial oil hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220396635.8U CN217300826U (en) | 2022-02-25 | 2022-02-25 | Piston pin oil hole structure for piston type refrigeration compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220396635.8U CN217300826U (en) | 2022-02-25 | 2022-02-25 | Piston pin oil hole structure for piston type refrigeration compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217300826U true CN217300826U (en) | 2022-08-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220396635.8U Active CN217300826U (en) | 2022-02-25 | 2022-02-25 | Piston pin oil hole structure for piston type refrigeration compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217300826U (en) |
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2022
- 2022-02-25 CN CN202220396635.8U patent/CN217300826U/en active Active
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