CN215487174U - Connecting rod of gasoline engine - Google Patents
Connecting rod of gasoline engine Download PDFInfo
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- CN215487174U CN215487174U CN202121440024.0U CN202121440024U CN215487174U CN 215487174 U CN215487174 U CN 215487174U CN 202121440024 U CN202121440024 U CN 202121440024U CN 215487174 U CN215487174 U CN 215487174U
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- connecting rod
- rod body
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- gasoline engine
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Abstract
The utility model relates to a gasoline engine connecting rod, which is an integral structure formed by forging and integrating and is provided with a connecting rod big head, a connecting rod body with one end connected with the big head of the connecting rod and a connecting rod small head connected with the other end of the connecting rod body, and is characterized in that: the width of the longitudinal section of the connecting rod body is gradually reduced from the small end of the connecting rod to the big end of the connecting rod, and the connecting rod body is of a variable-section structure; the connecting parts of the two ends of the connecting rod body and the connecting rod big end and the connecting rod small end are of arc structures. The utility model can satisfy the requirement of light weight of the connecting rod body and has enough rigidity, strength and flexibility.
Description
Technical Field
The utility model relates to a gasoline engine, in particular to a gasoline engine connecting rod, and particularly relates to a gasoline engine connecting rod with a variable cross-section rod body.
Background
The connecting rod is an important component for connecting the piston and the crankshaft and consists of a connecting rod big head, a connecting rod body and a connecting rod small head. When the engine runs, the connecting rod is subjected to explosion pressure transmitted from the top of the piston and reciprocating inertia force and rotating force caused by the rotation of the crankshaft. The particular operating environment requires the linkage to have sufficient stiffness, strength and flexion. With the requirement of light-weight design of the engine, the connecting rod is required to be light enough, and the parts participating in rotation and reciprocating motion are lighter and better on the premise of meeting the reliability.
The connecting rod body and the small connecting rod head participate in the rotation and reciprocating motion of the connecting rod. The conventional pitman shaft is a standard "i" beam construction. In the conventional I-beam structure, the cross-sectional width of the connecting rod body is a constant value, or the cross-sectional width of the connecting rod body is a variable cross-sectional connecting rod body with two wide ends and a constant value in the middle. In the connecting rod body, the middle constant value part is wide enough to ensure the buckling requirement of the connecting rod. Accordingly, there is a need for further improvements in existing engine connecting rods.
CN1959083 discloses an automobile engine connecting rod, which comprises a connecting rod big end rod body, a connecting rod middle section rod body, a connecting rod small end connecting end and a connecting rod big end connecting end, wherein the edge of the rod body is a connecting rod body side plate, the connecting rod big end rod body and the connecting rod small end rod body are arranged on a longitudinal section at the connecting part of the connecting rod middle section rod body from two ends to the middle respectively, and the thickness of the connecting rod is reduced from large to small. The connecting rod has enough fatigue strength and structural rigidity while ensuring the functions and effects of the connecting rod, and meanwhile, the I-shaped section adopts a variable section structure, so that the weight of the connecting rod is reduced, and the power consumed by the operation of the connecting rod is reduced.
The technical solutions of the automotive engine connecting rod disclosed in the above patent documents, while satisfying the requirements of rigidity, strength and buckling of the connecting rod, are not optimal solutions.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a gasoline engine connecting rod which has enough rigidity, strength and flexibility while meeting the requirement of light weight of a connecting rod body.
The utility model relates to a gasoline engine connecting rod which is an integral structure formed by forging and integrating, and is provided with a connecting rod big head, a connecting rod body with one end connected with the big head of the connecting rod, and a connecting rod small head connected with the other end of the connecting rod body, and is characterized in that: the width of the longitudinal section of the connecting rod body is gradually reduced from the small end of the connecting rod to the big end of the connecting rod, and the connecting rod body is of a variable-section structure; the connecting parts of the two ends of the connecting rod body and the connecting rod big end and the connecting rod small end are of arc structures.
Furthermore, two side edges of the longitudinal section of the connecting rod body are symmetrical about the center line of the connecting rod body, and the included angle between one side edge of the longitudinal section and the center line of the connecting rod body is 3 degrees.
Furthermore, the section of the connecting rod body is gradually reduced along the direction from the small end of the connecting rod to the large end of the connecting rod to form a wedge-shaped structure.
Further, the connecting rod body is connected with the big end of the connecting rod through a first arc section, a second arc section and a third arc section which are sequentially connected; the first arc section and the third arc section are of inward concave arc structures, and the second arc section is of outward convex arc structures.
Further, the small end of the connecting rod is provided with a connecting rod bushing; and the connecting rod bushing is provided with a water-drop-shaped oil groove.
Compared with the prior art, the utility model has the following advantages:
the width of the longitudinal section of the connecting rod body is gradually reduced from the small end of the connecting rod to the big end of the connecting rod, so that the connecting rod body is of a variable-section structure. The design scheme that two ends of the connecting rod body are wide and the middle of the connecting rod body is narrow is avoided, so that the stress of the connecting rod cannot be concentrated on the middle part of the connecting rod body, the failure fault of buckling deformation from the middle part of the connecting rod is greatly reduced, and the reliability of the connecting rod is improved.
Due to the wedge-shaped structure of the variable cross-section of the connecting rod body, the weight of the connecting rod can be reduced by about 5%. Because the weight of the connecting rod body is reduced, reciprocating inertia force and rotation moment are reduced, and better lubrication conditions are provided for the main bearing.
The connecting rod body is connected with the big end of the connecting rod through a first arc section, a second arc section and a third arc section which are connected in sequence. This connected mode has improved the intensity of connecting rod big head, can prevent to take place because the big head of connecting rod warp too big locking trouble that leads to.
Because the small end of the connecting rod is provided with the connecting rod bushing which is provided with the oil groove in a water drop shape. The oil groove can ensure that the small end of the connecting rod has sufficient lubrication, and can avoid abnormal abrasion of the small end of the connecting rod caused by poor lubrication, thereby improving the NVH performance of the connecting rod.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
fig. 3 is an enlarged view of the middle of fig. 2.
In the figure:
1-connecting rod big end;
2, a connecting rod body, 21, a longitudinal section, 22, a first arc section, 23, a second arc section and 24, a first upper arc section;
3-connecting rod small end, 31-connecting rod bush, 32-oil groove.
Detailed Description
The utility model is described in detail below with reference to the figures and examples.
Referring to fig. 1, 2 and 3, a gasoline engine connecting rod is an integral structure formed by forging, and has a connecting rod big end 1, a connecting rod body 2 with one end connected with the big end of the connecting rod, and a connecting rod small end 3 connected with the other end of the connecting rod body, and is characterized in that:
the width of the longitudinal section 21 of the connecting rod body 2 is gradually reduced from the small connecting rod head 3 to the large connecting rod head 1, and the connecting rod body is of a variable-section structure; the connecting rod body avoids the design scheme that two ends are wide and the middle is narrow, so that the stress of the connecting rod cannot be concentrated in the middle of the connecting rod body, the failure fault of buckling deformation in the middle of the connecting rod is greatly reduced, and the reliability of the connecting rod is improved. The connecting parts of the two ends of the connecting rod body 2 and the connecting rod big head 1 and the connecting rod small head 3 are in arc structures; so as to ensure the connection strength of the connecting rod body, the connecting rod big end and the connecting rod small end.
Two sides of the longitudinal section 21 of the connecting rod body 2 are symmetrical about the central line of the connecting rod body, and the included angle between one side of the longitudinal section 21 and the central line of the connecting rod body is 3 degrees. Through CAE iterative analysis, the weight of the connecting rod can be reduced by about 5% by the variable-section connecting rod body structure on the premise of ensuring that the rigidity, the strength and the buckling of the connecting rod are not changed. Because the weight of the connecting rod body is reduced, reciprocating inertia force and rotation moment are reduced, and better lubrication conditions are provided for the main bearing.
The section of the connecting rod body 2 is gradually reduced along the direction from the small end 3 of the connecting rod to the large end 1 of the connecting rod to form a wedge-shaped structure. The connecting rod body with the wedge-shaped structure can further realize light weight design on the premise of ensuring that the strength and rigidity of the small end of the connecting rod are not changed.
The connecting rod body 2 is connected with the connecting rod big end 1 through a first arc section 22, a second arc section 23 and a third arc section 24 which are connected in sequence; the first arc segment 22 and the third arc segment 24 are of inward concave arc structures, and the second arc segment 23 is of outward convex arc structures. This connected mode has improved the intensity of connecting rod big head, can prevent to take place because the big head of connecting rod warp too big locking trouble that leads to.
The small connecting rod head 3 is provided with a connecting rod bush 31; the connecting rod bush 31 is provided with an oil groove 32 in a "water droplet shape". The oil groove can ensure that the small end of the connecting rod has sufficient lubrication, and can avoid abnormal abrasion of the small end of the connecting rod caused by poor lubrication, thereby improving the NVH performance of the connecting rod.
Claims (5)
1. The utility model provides a gasoline engine connecting rod, for forging integrated into one piece's overall structure, has connecting rod big end (1), connecting rod body (2) that one end and connecting rod big end link to each other, little head of connecting rod (3) that link to each other with the connecting rod body other end, characterized by:
the width of a longitudinal section (21) of the connecting rod body (2) is gradually reduced from a small connecting rod head (3) to a large connecting rod head (1), and the connecting rod body is of a variable-section structure; the connecting part of the two ends of the connecting rod body (2) and the connecting rod big end (1) and the connecting rod small end (3) is of an arc structure.
2. The gasoline engine connecting rod as set forth in claim 1, wherein: two side edges of a longitudinal section (21) of the connecting rod body (2) are symmetrical about the center line of the connecting rod body, and the included angle between one side of the longitudinal section (21) and the center line of the connecting rod body is 3 degrees.
3. The gasoline engine connecting rod according to claim 1 or 2, characterized in that: the section of the connecting rod body (2) is gradually reduced along the direction from the small connecting rod head (3) to the large connecting rod head (1) to form a wedge-shaped structure.
4. The gasoline engine connecting rod according to claim 1 or 2, characterized in that: the connecting rod body (2) is connected with the connecting rod big head (1) through a first arc section (22), a second arc section (23) and a third arc section (24) which are sequentially connected; the first arc section (22) and the third arc section (24) are of inward concave arc structures, and the second arc section (23) is of outward convex arc structures.
5. The gasoline engine connecting rod according to claim 1 or 2, characterized in that: the connecting rod small end (3) is provided with a connecting rod bushing (31); an oil groove (32) in a water drop shape is arranged on the connecting rod bushing (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121440024.0U CN215487174U (en) | 2021-06-28 | 2021-06-28 | Connecting rod of gasoline engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121440024.0U CN215487174U (en) | 2021-06-28 | 2021-06-28 | Connecting rod of gasoline engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215487174U true CN215487174U (en) | 2022-01-11 |
Family
ID=79722528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121440024.0U Active CN215487174U (en) | 2021-06-28 | 2021-06-28 | Connecting rod of gasoline engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215487174U (en) |
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2021
- 2021-06-28 CN CN202121440024.0U patent/CN215487174U/en active Active
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