CN219197849U - Connecting rod bolt for diesel engine - Google Patents
Connecting rod bolt for diesel engine Download PDFInfo
- Publication number
- CN219197849U CN219197849U CN202223548364.2U CN202223548364U CN219197849U CN 219197849 U CN219197849 U CN 219197849U CN 202223548364 U CN202223548364 U CN 202223548364U CN 219197849 U CN219197849 U CN 219197849U
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- connecting rod
- bolt
- knurled
- twelve
- knurled surface
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Abstract
The utility model discloses a connecting rod bolt for a diesel engine, which has the structure that: one end of the connecting rod bolt is designed into a twelve-angle bolt head, and the thread section is arranged at the other end of the screw rod. A knurled surface is arranged on the screw rod between the twelve-angle bolt head and the thread section, and the center distance of the first knurled surface is 7.5mm from the root of the twelve-angle bolt head; the center of the second knurled surface is 6.5mm away from the root of the thread section; the center distance between the first knurled surface and the second knurled surface is 27mm, and the two knurled surfaces form a double positioning surface of the connecting rod bolt. The connecting rod bolt is made of high-quality alloy structural steel, and the geometric shape and the outline dimensions of each part are matched according to the model of the diesel engine. The knurled double-positioning-surface structure ensures accurate positioning of the connecting rod body and the connecting rod cover, and simultaneously, the twelve-angle bolt head is buried in the connecting rod cover bolt hole so as to maintain good fastening support. The engine is not loosened and deformed under the action of alternating force, and the unique structure and the internal technical indexes provide guarantee for the performance of the whole engine.
Description
Technical Field
The utility model belongs to mechanical parts of an engine, and particularly relates to a connecting rod bolt for a diesel engine.
Background
In the current mechanical industries with vibration characteristics such as automobile manufacturing and internal combustion engines, the connection of vibration components is still generally fixed by standard components such as bolts, spring washers, nuts and the like. For example, the engine and exhaust line are two sources of vibration, with greater vibration during operation. Loosening of the exhaust pipe nut often occurs, so that the exhaust pipe leaks air and even falls off. For example, a starter of an engine is generally assembled on a flywheel housing made of cast iron and the like, and the problem that bolt torque is small due to the adoption of stud and nut connection is also caused. The connecting rod bolt for the engine is used for connecting a crankshaft and a connecting rod, and the quality of the operation of the crankshaft and the connecting rod directly influences the quality of the whole engine. The connecting rod bolt bears alternating load in the working process of the engine, so that the connecting rod bolt is mostly made of high-quality alloy steel or carbon steel with good toughness. In order to ensure that the connecting rod bearing bush is well attached to the hole of the connecting rod big end, and prevent the split surface of the connecting rod big end from generating gaps under the condition of stress, the connecting rod bolt must have a certain pretightening force. The utility model improves the connecting rod bolt, so that the connecting rod bolt is more convenient to install, and a good assembly effect is achieved.
Disclosure of Invention
The utility model aims to provide a connecting rod bolt of a diesel engine.
In order to achieve the above object, the technical structure of the connecting rod bolt for the diesel engine is as follows: one end of the connecting rod bolt is designed into a twelve-angle bolt head, and the thread section is arranged at the other end of the connecting rod bolt. A knurled surface is arranged on the screw rod between the twelve-angle bolt head and the thread section, and the center distance of the first knurled surface is 7.5mm from the root of the twelve-angle bolt head; the center of the second knurled surface is 6.5mm away from the root of the thread section; the center distance between the first knurled surface and the second knurled surface is 27mm, and the two knurled surfaces form a double positioning surface of the connecting rod bolt.
The connecting rod bolt is of an integral structure, the twelve-angle bolt head is of a standard dodecahedron, the threaded section is connected with the connecting rod body, the bulge of the first knurled positioning surface of the connecting rod bolt is used for positioning the connecting rod cover of the engine, and the bulge of the second knurled positioning surface is used for controlling the positioning of the connecting rod body.
In order to ensure that the connecting rod bearing bush is well attached to the connecting rod big end hole and prevent a gap from being generated on the splitting surface of the connecting rod big end under the condition of stress, the connecting rod bolt must have a certain pretightening force.
The connecting rod cover and the connecting rod body are fastened and connected into a whole through the connecting rod bolt to form a connecting rod big end hole connected with the crank pin. The double positioning surfaces of the connecting rod bolts ensure that the roundness of the big end hole of the connecting rod meets the use requirement, and the faults such as early abrasion, eccentric abrasion and the like are prevented.
The utility model has the characteristics and the effects that: the diesel engine is made of high-quality alloy structural steel, and the geometric shape and the outline dimensions of all parts are matched according to the model of the diesel engine. The knurled double-positioning-surface structure ensures accurate positioning of the connecting rod body and the connecting rod cover, and simultaneously, the twelve-angle bolt head is buried in the connecting rod cover bolt hole so as to keep good fastening support, and the connecting rod cover is not loosened and deformed under the action of alternating force. The unique structure and the internal technical indexes provide guarantee for the performance of the whole engine, and the shape of the knurled double-positioning surface is suitable for the special requirements of the engine connecting rod.
Drawings
Figure 1 is a schematic diagram of the present utility model.
Detailed Description
The utility model is further described below with reference to the drawings in connection with embodiments.
The connecting rod bolt for the diesel engine has the structure that: one end of the connecting rod bolt is designed into a twelve-angle bolt head 1-1, a thread section 1-2 is arranged at the other end of the screw rod, and a knurled surface is arranged on the screw rod 1-3 between the twelve-angle bolt head and the thread section. The center distance of the first knurled surface 2-1 is 7.5mm from the root of the twelve-angle bolt head; the center distance between the second knurled surface 2-2 and the root of the thread section is 6.5mm; the center distance between the first knurled surface and the second knurled surface is 27mm, and the two knurled surfaces form a double positioning surface of the connecting rod bolt.
As an example, the total length of the connecting rod bolt is 71mm; wherein the diameter of the screw rod is phi 8.6mm; the length of the thread section is 21mm, and the specification of the thread is M10X1.5-4h.
The utility model is formed by forging a rolled bar stock at a specific temperature, and then is subjected to thermal treatment tempering to obtain uniform sorbite tissues, mechanical processing by a machine tool and surface phosphating treatment. The connecting rod bolt meets the use requirements of vibration and strength of a diesel engine no matter from the mechanical property or the surface treatment requirement.
Claims (2)
1. Connecting rod bolt for diesel engine, characterized by: one end of the connecting rod bolt is designed into a twelve-angle bolt head (1-1), a threaded section (1-2) is arranged at the other end of the screw rod, a knurled surface is arranged on the screw rod (1-3) between the twelve-angle bolt head and the threaded section, and the center distance of the first knurled surface (2-1) is 7.5mm from the root of the twelve-angle bolt head; the center distance between the second knurled surface (2-2) and the root of the thread section is 6.5mm; the center distance between the first knurled surface and the second knurled surface is 27mm, and the two knurled surfaces form a double positioning surface of the connecting rod bolt.
2. The connecting rod bolt for a diesel engine according to claim 1, wherein the total length of the connecting rod bolt is 71mm; wherein the diameter of the screw rod is 8.6mm; the length of the thread segments is 21mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223548364.2U CN219197849U (en) | 2022-12-28 | 2022-12-28 | Connecting rod bolt for diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223548364.2U CN219197849U (en) | 2022-12-28 | 2022-12-28 | Connecting rod bolt for diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219197849U true CN219197849U (en) | 2023-06-16 |
Family
ID=86714813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223548364.2U Active CN219197849U (en) | 2022-12-28 | 2022-12-28 | Connecting rod bolt for diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219197849U (en) |
-
2022
- 2022-12-28 CN CN202223548364.2U patent/CN219197849U/en active Active
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