Gasoline engine crankshaft structure
By introducing mounting and limiting parts into the crankshaft structure of the gasoline engine, the problem of loose or falling bolts was solved, a stable connection between the crankshaft and the flywheel was achieved, and the reliability and safety of power transmission were improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU LIANXING MASCH TECH CO LTD
- Filing Date
- 2025-08-07
- Publication Date
- 2026-06-26
AI Technical Summary
In the existing gasoline engine crankshaft structure, the bolts are prone to loosening or falling off during the connection process with the flywheel, which affects the smoothness and reliability of power transmission.
The design incorporates mounting and limiting components, including a cross bracket, hinge rod, snap-fit assembly, and limiting assembly. Through sliding connection and spring structure, it achieves a stable connection between the crankshaft and flywheel, avoiding excessive stress at a single point and improving connection reliability and safety.
It significantly shortens the installation and disassembly time of crankshaft and flywheel, improves assembly and maintenance efficiency, ensures the reliability of power transmission, reduces the risk of failure, and enhances the safety of use.
Smart Images
Figure CN224414245U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of gasoline engine crankshaft technology, and in particular relates to a gasoline engine crankshaft structure. Background Technology
[0002] As the automotive industry continues to demand higher levels of power performance and operational stability, the performance optimization of gasoline engines, as the core power source of automobiles, is of paramount importance. The connection between the crankshaft and flywheel, as a crucial link in power transmission, directly affects whether engine power can be efficiently and stably transmitted to the transmission system, decisively influencing the overall vehicle's power output and driving experience. Therefore, the design and optimization of its connection structure has become a key focus of the industry.
[0003] However, the existing gasoline engine crankshaft structure uses a simple bolt fixing method in the process of connecting with the flywheel. During long-term high-speed operation or frequent start-stop of the engine, the bolts are prone to loosening or even falling off, which affects the smoothness and reliability of power transmission. Utility Model Content
[0004] The purpose of this utility model is to provide a gasoline engine crankshaft structure. By setting up an installation part, it solves the problem that in the existing gasoline engine crankshaft structure, the simple bolt fixing method is used in the connection with the flywheel. During the long-term high-speed operation or frequent start-stop of the engine, the bolts are prone to loosening or even falling off, which affects the smoothness and reliability of power transmission.
[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:
[0006] This utility model relates to a gasoline engine crankshaft structure, including a crankshaft and a flywheel disposed on the right side of the crankshaft, and further including: a mounting part, which is mounted on the crankshaft; and a limiting part, which is disposed on the right side of the crankshaft; wherein, the mounting part is located on the right side of the crankshaft.
[0007] Furthermore, the mounting portion includes a mounting assembly disposed on the crankshaft; and a drive assembly mounted on the outer wall of the crankshaft; wherein the mounting assembly is located on the right side of the crankshaft, and the drive assembly is located on the left side of the mounting assembly.
[0008] Furthermore, the mounting assembly includes a cross bracket fixedly connected to the outer wall of the crankshaft. The cross bracket has several limiting grooves, and each of the limiting grooves has a fixing block slidably connected to it. The flywheel has several fixing slots. There are four limiting grooves, and the fixing blocks are respectively matched with the fixing slots. This can evenly distribute the torque and stress borne by the connection parts, avoid excessive force at a single point, and improve the reliability of the connection.
[0009] Furthermore, the drive assembly includes a rectangular plate rotatably connected to the outer wall of the crankshaft, and a plurality of hinge rods are hinged on the rectangular plate; wherein, the rectangular plate is located on the left side of the cross bracket, and the plurality of hinge rods are respectively hinged to a plurality of fixed blocks, which shortens the installation and disassembly time of the crankshaft and flywheel and improves assembly and maintenance efficiency.
[0010] Furthermore, the limiting part includes a snap-fit assembly mounted on the drive assembly; and a limiting assembly disposed on the right side of the crankshaft.
[0011] Furthermore, the buckle assembly includes a circular hole formed in a rectangular plate, a circular plate fixedly connected to the inner wall of the circular hole, a slide rod passing through the circular plate, and a fixing member provided on the slide rod; wherein, the slide rod is slidably connected to the circular plate, the fixing member includes a limiting hole formed in a cross bracket, a circular ring fixedly connected to the outer wall of the slide rod, and a spring sleeved on the outer wall of the slide rod, the left side of the spring being fixedly connected to the circular plate, and the right side of the spring being fixedly connected to the circular ring; wherein, the slide rod and the limiting hole are adapted to each other, reducing the risk of connection failure and improving the safety and reliability of the power system.
[0012] Furthermore, the limiting assembly includes two cylindrical rods fixedly connected to the outer wall of the crankshaft, and two L-shaped grooves are formed on the flywheel; wherein, the two cylindrical rods are respectively located at the top and bottom of the crankshaft, and the two L-shaped grooves are located at the connection between the flywheel and the crankshaft, and the two cylindrical rods are respectively adapted to the two L-shaped grooves, which can prevent accidental disassembly when the engine is running or not completely stopped, thus enhancing the safety of use.
[0013] This utility model has the following beneficial effects:
[0014] 1. By setting up an installation section, when installing the crankshaft and flywheel, several fixed blocks are aligned with several fixed slots. Then, the rectangular plate is rotated counterclockwise. At this time, the rectangular plate drives several hinge rods to move. The hinge rods then drive several fixed blocks to slide in several limit grooves and move closer to each other, causing the fixed blocks to be engaged in their corresponding fixed slots, thereby connecting the crankshaft and flywheel. Through the reverse operation process, the crankshaft and flywheel can be disassembled, shortening the installation and disassembly time, significantly improving the efficiency of assembly and maintenance, avoiding the problem of excessive force at a single point, effectively preventing relative displacement between the crankshaft and flywheel, and ensuring the reliability of power transmission.
[0015] 2. By setting a limiting part, when installing the crankshaft, the crankshaft is inserted into the flywheel. At this time, the crankshaft drives two cylindrical rods to insert into two L-shaped slots respectively. Rotating the crankshaft clockwise causes the two cylindrical rods to enter the two L-shaped slots. When the rectangular plate moves the sliding rod through the circular plate, when the sliding rod approaches the limiting hole, it is pulled to the left on the circular plate. At this time, the sliding rod compresses the circular ring through the circular ring, generating deformation and elasticity. Then, the cross bracket is rotated to make the sliding rod align with the limiting hole. Then the sliding rod is released. At this time, under the action of the spring force, the sliding rod is forced into the limiting hole, thereby limiting the rotation of the rectangular plate. When the limiting hole is rotated clockwise, the sliding rod is pulled to the left and away from the limiting hole, thereby releasing the restriction on the rectangular plate. This allows the crankshaft and flywheel to be disassembled, keeping the connection between the crankshaft and flywheel stable, reducing the risk of failure, preventing accidental disassembly while the engine is running or not completely stopped, and enhancing the safety of use.
[0016] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description
[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a partial cross-sectional view of the overall structure of this utility model;
[0019] Figure 2 This is a partial exploded cross-sectional view of the mounting section of this utility model;
[0020] Figure 3 This utility model Figure 2 A magnified structural diagram of A in the middle;
[0021] Figure 4 This utility model Figure 2 A magnified structural diagram of B in the diagram;
[0022] Figure 5 This is a partial exploded cross-sectional view of the limiting part of this utility model;
[0023] Figure 6 This utility model Figure 5 A magnified structural diagram of C;
[0024] Figure 7 This is a schematic diagram of the overall structure of this utility model.
[0025] The attached diagram lists the components represented by each number as follows:
[0026] 111, Crankshaft; 112, Flywheel; 2, Mounting part; 21, Mounting assembly; 211, Cross bracket; 212, Limiting slide; 213, Fixing block; 214, Fixing groove; 22, Drive assembly; 221, Rectangular plate; 222, Hinge rod; 3, Limiting part; 31, Snap-fit assembly; 311, Circular hole; 312, Circular plate; 313, Slide rod; 314, Limiting hole; 315, Circular ring; 316, Spring; 32, Limiting assembly; 321, Cylindrical rod; 322, L-shaped groove. Detailed Implementation
[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0028] Please see Figure 1-7 As shown, this utility model is a crankshaft structure for a gasoline engine, including a crankshaft 111 and a flywheel 112 disposed on the right side of the crankshaft 111. It also includes: a mounting part 2, mounted on the crankshaft 111; and a limiting part 3, disposed on the right side of the crankshaft 111. The mounting part 2 is located on the right side of the crankshaft 111 and includes a mounting assembly 21 disposed on the crankshaft 111. It also includes a drive assembly 22, mounted on the outer wall of the crankshaft 111. The mounting assembly 21 is located on the right side of the crankshaft 111, and the drive assembly 22 is located on the left side of the mounting assembly 21. The mounting assembly 21 includes a cross bracket 211 fixedly connected to the outer wall of the crankshaft 111, and the cross bracket 211 has several limiting grooves 212. Each slide groove 212 is slidably connected with a fixing block 213, and the flywheel 112 is provided with several fixing slots 214. Among them, four limiting slide grooves 212 are provided, and several fixing blocks 213 are respectively adapted to several fixing slots 214. The drive assembly 22 includes a rectangular plate 221 rotatably connected to the outer wall of the crankshaft 111. Several hinge rods 222 are hinged on the rectangular plate 221. The rectangular plate 221 is located on the left side of the cross bracket 211, and several hinge rods 222 are respectively hinged to several fixing blocks 213. By setting the mounting part 2, the installation and disassembly time is shortened, the assembly and maintenance efficiency is significantly improved, the problem of excessive force at a single point is avoided, and the relative displacement between the crankshaft 111 and the flywheel 112 is effectively prevented, ensuring the reliability of power transmission.
[0029] The limiting part 3 includes a latching assembly 31, which is mounted on the drive assembly 22; and a limiting assembly 32, which is located on the right side of the crankshaft 111. The latching assembly 31 includes a circular hole 311 opened in a rectangular plate 221. A circular plate 312 is fixedly connected to the inner wall of the circular hole 311. A slide rod 313 passes through the circular plate 312 and is provided with a fixing member. The slide rod 313 is slidably connected to the circular plate 312. The fixing member includes a limiting hole 314 opened in a cross bracket 211. A circular ring 315 is fixedly connected to the outer wall of the slide rod 313. A spring 316 is sleeved on the outer wall of the slide rod 313. The left side of the spring 316 is fixed to the circular plate 312. The spring 316 is fixedly connected to the right side of the circular ring 315. The slide rod 313 is adapted to the limiting hole 314. The limiting assembly 32 includes two cylindrical rods 321 fixedly connected to the outer wall of the crankshaft 111. The flywheel 112 has two L-shaped grooves 322. The two cylindrical rods 321 are located at the top and bottom of the crankshaft 111, respectively. The two L-shaped grooves 322 are located at the connection between the flywheel 112 and the crankshaft 111. The two cylindrical rods 321 are adapted to the two L-shaped grooves 322. By setting the limiting part 3, the connection between the crankshaft 111 and the flywheel 112 is kept stable, reducing the risk of failure and preventing accidental disassembly when the engine is running or not completely stopped, thus enhancing the safety of use.
[0030] A specific application of this embodiment is as follows: In use, the crankshaft 111 is inserted into the flywheel 112. At this time, the crankshaft 111 drives two cylindrical rods 321 to insert into two L-shaped grooves 322 respectively and rotates the crankshaft 111 clockwise, so that the two cylindrical rods 321 enter the two L-shaped grooves 322, causing several fixed blocks 213 to correspond to several fixed grooves 214 respectively. Then, the rectangular plate 221 is rotated counterclockwise. At this time, the rectangular plate 221 drives several hinge rods 222 to move. At this time, several hinge rods 222 drive several fixed blocks 213 to slide in several limiting slide grooves 212 and move closer to each other, causing several fixed blocks 213 to be engaged in the corresponding several fixed grooves 214 respectively, thereby connecting the crankshaft 111 and the flywheel 112. Through the reverse operation process described above, the crankshaft 111 is connected to the flywheel 112. The crankshaft 111 and flywheel 112 are disassembled. When the rectangular plate 221 moves the sliding rod 313 through the circular plate 312, when the sliding rod 313 approaches the limiting hole 314, it is pulled to the left on the circular plate 312. At this time, the sliding rod 313 is squeezed by the circular ring 315 to generate deformation and elasticity. Then, the cross bracket 211 is rotated to make the sliding rod 313 correspond to the limiting hole 314. Then the sliding rod 313 is released. At this time, under the action of the spring 316, the sliding rod 313 is pushed into the limiting hole 314, thereby restricting the rotation of the rectangular plate 221. When the limiting hole 314 is rotated clockwise, the sliding rod 313 is pulled to the left and away from the limiting hole 314, thereby releasing the restriction on the rectangular plate 221, thus disassembling the crankshaft 111 and flywheel 112.
[0031] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0032] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.
Claims
1. A gasoline engine crankshaft structure comprising a crankshaft (111) and a flywheel (112) provided on the right side of the crankshaft (111), characterized in that, Also includes: Mounting part (2), said mounting part (2) is mounted on crankshaft (111); and A limiting part (3) is provided on the right side of the crankshaft (111); The mounting part (2) is located on the right side of the crankshaft (111).
2. The gasoline engine crankshaft structure according to claim 1, characterized in that, The mounting section (2) includes a mounting assembly (21) disposed on the crankshaft (111); and A drive assembly (22) is mounted on the outer wall of the crankshaft (111); The mounting component (21) is located on the right side of the crankshaft (111), and the drive component (22) is located on the left side of the mounting component (21).
3. The gasoline engine crankshaft structure according to claim 2, characterized in that, The limiting part (3) includes a latching assembly (31) which is mounted on the drive assembly (22); and A limiting component (32) is disposed on the right side of the crankshaft (111).
4. The gasoline engine crankshaft structure according to claim 3, characterized in that, The mounting assembly (21) includes a cross bracket (211) fixedly connected to the outer wall of the crankshaft (111). The cross bracket (211) has several limiting grooves (212), and each of the several limiting grooves (212) is slidably connected to a fixing block (213). The flywheel (112) has several fixing grooves (214). Among them, four limit slides (212) are provided, and several fixed blocks (213) are respectively matched with several fixed slots (214).
5. A gasoline engine crankshaft structure according to claim 4, characterized in that, The drive assembly (22) includes a rectangular plate (221) rotatably connected to the outer wall of the crankshaft (111), and a plurality of hinge rods (222) are hinged on the rectangular plate (221). Among them, the rectangular plate (221) is located on the left side of the cross bracket (211), and several hinge rods (222) are respectively hinged to several fixed blocks (213).
6. A gasoline engine crankshaft structure according to claim 5, characterized in that, The buckle assembly (31) includes a circular hole (311) opened on a rectangular plate (221), a circular plate (312) is fixedly connected to the inner wall of the circular hole (311), a slide rod (313) passes through the circular plate (312), and a fixing member is provided on the slide rod (313); The slide rod (313) is slidably connected to the circular plate (312).
7. A gasoline engine crankshaft structure according to claim 6, characterized in that, The limiting component (32) includes two cylindrical rods (321) fixedly connected to the outer wall of the crankshaft (111), and two L-shaped grooves (322) are provided on the flywheel (112). Among them, two cylindrical rods (321) are located at the top and bottom of the crankshaft (111) respectively, and two L-shaped grooves (322) are located at the connection between the flywheel (112) and the crankshaft (111). The two cylindrical rods (321) are adapted to the two L-shaped grooves (322) respectively.
8. A gasoline engine crankshaft structure according to claim 7, characterized in that, The fastener includes a limiting hole (314) opened on the cross bracket (211), a circular ring (315) is fixedly connected to the outer wall of the slide rod (313), and a spring (316) is sleeved on the outer wall of the slide rod (313). The left side of the spring (316) is fixedly connected to the circular plate (312), and the right side of the spring (316) is fixedly connected to the circular ring (315). Among them, the slide bar (313) is adapted to the limiting hole (314).