CN209856000U - Crank connecting rod piston assembly - Google Patents
Crank connecting rod piston assembly Download PDFInfo
- Publication number
- CN209856000U CN209856000U CN201920722419.6U CN201920722419U CN209856000U CN 209856000 U CN209856000 U CN 209856000U CN 201920722419 U CN201920722419 U CN 201920722419U CN 209856000 U CN209856000 U CN 209856000U
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- piston
- connecting rod
- crank
- piston assembly
- sealing
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Abstract
The utility model relates to the technical field of air compressors, in particular to a crank connecting rod piston assembly applied to an air compressor, which comprises a piston, a crank and a connecting rod, wherein the piston is internally provided with an axially extending connecting rod connecting cavity and a radially extending pin hole, a piston pin is arranged in the pin hole, the piston connecting end is connected with the piston pin through a needle bearing, and sealing oil seals are arranged on two sides of the needle bearing; the piston body outside is equipped with sealed annular and direction annular, install the sealing ring in the sealed annular, install the guide ring in the direction annular, sealing ring and guide ring are made by self-lubricating wear-resisting combined material. In the structure, the crank connecting rod piston assembly does not need lubricating oil, so that an oil cooling system does not need to be equipped in the application of the air compressor, the structure is simpler, the cost is lower, the system fault caused by the fact that the lubricating oil is discharged along with compressed air is avoided, and the reliability is better.
Description
Technical Field
The utility model relates to an air compressor technical field, concretely relates to be applied to air compressor's crank connecting rod piston assembly.
Background
The electric air compressor is the air supply that provides system compressed air such as braking, switch door for new forms of energy electric automobile, and the electric air compressor who uses in the existing market uses oil lubrication as the owner, because when having the air compressor of oil lubrication to exhaust, partial lubricating oil is discharged along with compressed air, leads to system's faults such as braking to need be equipped with oil cooling system, it is bulky, occupation space is big, the weight is heavy and the oil leakage fault appears easily. Therefore, the air compressor without oil lubrication is a development direction in the future.
In an electric air compressor, the most dominant positions for using lubricating oil are lubrication between a piston and a piston cavity and lubrication of a friction pair between two ends of a connecting rod and the piston and a crank. Accordingly, the present application will provide a crank rod piston assembly for use in an oil-free air compressor.
Disclosure of Invention
The to-be-solved technical problem of the utility model is to provide a crank connecting rod piston assembly suitable for oil-free lubrication air compressor.
In order to solve the technical problem, the utility model provides a technical scheme as follows: a crank connecting rod piston assembly comprising at least:
the crank is provided with a connecting rod connecting neck;
the connecting rod is provided with a crank connecting end and a piston connecting end, the crank connecting end is connected with a connecting rod connecting neck through a rolling bearing, and framework type rubber sealing rings are mounted between inner rings and outer rings on two sides of the rolling bearing;
the piston at least comprises a piston body, an axially extending connecting rod connecting cavity and a radially extending pin hole are formed in the piston body, a piston pin is installed in the pin hole, the piston connecting end is connected with the piston pin through a needle bearing, and sealing oil seals are installed on two sides of the needle bearing; the piston body outside is equipped with sealed annular and direction annular, install the sealing ring in the sealed annular, install the guide ring in the direction annular, sealing ring and guide ring are made by self-lubricating wear-resisting combined material.
In a preferred embodiment, the rolling bearing is a deep groove ball bearing.
In a preferred embodiment, a lining spring is arranged between the sealing ring inner ring and the sealing ring groove.
In a preferred embodiment, the pin bore extends radially through the piston body.
In a preferred embodiment, the connecting rod is provided with a lightening hole.
In a preferred embodiment, the sealing ring and the guide ring are made of a self-lubricating abrasion-resistant composite material of polytetrafluoroethylene.
The crank connecting rod piston assembly of the utility model is characterized in that the crank connecting end of the connecting rod is connected with the crankshaft through the rolling bearing, the piston connecting end is connected with the piston pin through the needle bearing, and as the two sides of the rolling bearing are provided with the skeleton type rubber sealing rings, lubricating grease can be stored in the sealing cavity; and sealing oil seals are arranged on two sides of the needle bearing, and lubricating grease can be stored in a sealing cavity formed by the sealing oil seals. That is, the needle roller bearing and the rolling bearing can be lubricated by the stored lubricating grease, and no additional lubricating oil is needed.
In addition, the piston realizes sliding seal between the sealing ring and the guide ring made of the self-lubricating wear-resistant composite material and the piston cavity, wherein the self-lubricating wear-resistant composite material has the self-lubricating characteristic and does not need lubricating oil for lubrication.
Therefore, the crank connecting rod piston assembly of the embodiment does not need lubricating oil, and an oil cooling system does not need to be equipped in the application of the air compressor, so that the structure is simpler, the cost is lower, the system fault caused by the fact that the lubricating oil is discharged along with compressed air is avoided, and the reliability is better.
Drawings
FIG. 1 is a schematic front view of a crank-connecting rod piston assembly according to the present embodiment;
FIG. 2 is a schematic sectional view of the crank connecting rod piston assembly according to the present embodiment;
fig. 3 is a schematic diagram of the back structure of the crank connecting rod piston assembly of the present embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "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 in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may include, for example, a fixed connection, an integral connection, or a detachable connection; may be communication within two elements; they may be directly connected or indirectly connected through an intermediate, and those skilled in the art can understand the specific meaning of the above terms in the present invention in specific situations.
As shown in fig. 1 to 3, the crank connecting rod piston assembly of the present embodiment includes a crank 10, a connecting rod 20, and a piston 30. Wherein the piston comprises at least a piston body 31, the inside of which plug body 31 is provided with an axially extending connecting rod connecting cavity 38 and a radially extending pin bore 32, in which a piston pin 39 is mounted. Preferably, the pin hole radially penetrates through the piston body to facilitate insertion of the piston pin for connection.
The piston body of the embodiment is externally provided with a sealing ring groove 33 and a guide ring groove 34, wherein a sealing ring 36 is installed in the sealing ring groove 33 and is used for realizing sliding sealing between the piston and the piston cavity. Preferably, in order to ensure the sealing performance and the compensation of the worn sealing ring, a lining spring 37 is arranged between the inner ring of the sealing ring and the sealing ring groove, the lining spring 37 always provides an elastic force for the sealing ring to extend in the radial direction all the time, and the wear amount can be compensated after the sealing ring is worn, so that the service life is prolonged.
In this embodiment, a guide ring 35 is installed in the guide ring groove 34, and the guide ring and the seal ring together form a support to ensure the displacement direction of the piston relative to the piston cavity and prevent eccentric wear.
In this embodiment, the seal ring and the guide ring are made of self-lubricating wear-resistant composite material. The self-lubricating wear-resistant composite material is not the invention of the application, and the material is purchased in the market, such as a polytetrafluoroethylene self-lubricating wear-resistant composite material.
The crank 10 in this embodiment is provided with a connecting rod connecting neck 11, and the connecting rod 20 is correspondingly provided with a crank connecting end 21 and a piston connecting end 22. The piston connecting end 22 and the piston pin 39 are connected through a needle bearing 25, sealing oil seals 26 are mounted on two sides of the needle bearing, and a sealed cavity is formed between the sealing oil seals 26 on the two sides and used for storing lubricating grease which cannot leak to the interior of the compressor.
Further, the crank connecting end 21 and the connecting rod connecting neck 11 of the present embodiment are connected by a rolling bearing 23, wherein a skeleton rubber seal 24 is installed between the inner ring and the outer ring of the rolling bearing at both sides, and a sealed cavity is also formed between the skeleton rubber seal 24 and the inner ring and the outer ring of the rolling bearing for storing lubricating grease, which will not leak into the compressor. Preferably, the rolling bearing 23 is a deep groove ball bearing.
In an alternative embodiment, the connecting rod is provided with lightening holes 27 in order to save cost and reduce weight under the condition of meeting the connection strength.
In summary, the above description is only a preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention should be included within the scope of the present invention.
Claims (6)
1. A crank connecting rod piston assembly, comprising at least:
the crank (10) is provided with a connecting rod connecting neck (11);
the connecting rod (20) is provided with a crank connecting end (21) and a piston connecting end (22), the crank connecting end (21) is connected with the connecting rod connecting neck (11) through a rolling bearing (23), and framework type rubber sealing rings (24) are mounted between inner rings and outer rings on two sides of the rolling bearing;
the piston (30) at least comprises a piston body (31), an axially extending connecting rod connecting cavity (38) and a radially extending pin hole (32) are formed in the piston body, a piston pin (39) is installed in the pin hole, the piston connecting end (22) is connected with the piston pin (39) through a needle bearing (25), and sealing oil seals (26) are installed on two sides of the needle bearing; piston body outside is equipped with sealed annular (33) and direction annular (34), install sealing ring (36) in sealed annular (33), install guide ring (35) in direction annular (34), sealing ring and guide ring are made by self-lubricating wear-resisting combined material.
2. Crank-connecting rod piston assembly according to claim 1, characterized in that the rolling bearing (23) is a deep groove ball bearing.
3. A crank rod piston assembly according to claim 1, characterized in that a lining spring (37) is arranged between the inner ring of the sealing ring and the sealing ring groove.
4. A crank rod piston assembly according to any of claims 1-3 wherein the pin bore extends radially through the piston body.
5. A crank rod piston assembly according to any of claims 1-3 characterized in that the connecting rod is provided with lightening holes (27).
6. A crank rod piston assembly according to any one of claims 1 to 3 wherein the sealing and guide rings are made of a self-lubricating abrasion-resistant composite material of the polytetrafluoroethylene type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920722419.6U CN209856000U (en) | 2019-05-20 | 2019-05-20 | Crank connecting rod piston assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920722419.6U CN209856000U (en) | 2019-05-20 | 2019-05-20 | Crank connecting rod piston assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209856000U true CN209856000U (en) | 2019-12-27 |
Family
ID=68941351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920722419.6U Active CN209856000U (en) | 2019-05-20 | 2019-05-20 | Crank connecting rod piston assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209856000U (en) |
-
2019
- 2019-05-20 CN CN201920722419.6U patent/CN209856000U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20230905 Granted publication date: 20191227 |