A connecting rod and cylinder liner assembly structure with high resistance to deformation

Abstract

This utility model discloses a connecting rod and cylinder liner assembly structure with high deformation resistance, including a cylinder liner, a connecting rod, and a piston. The connecting rod includes a rod body, a big end, a connecting rod cap, and a small end. The big end of the connecting rod is connected to the crankshaft, and the small end is connected to the piston. The piston is slidably assembled within the cylinder liner. A clearance groove is formed at the lower end of the cylinder liner. The position of the clearance groove corresponds to the position of the big end of the connecting rod, and it is used to make way for the big end of the connecting rod. The length of the clearance groove is less than 30% of the length of the piston skirt. This utility model has the advantages of simple structure and adaptability to high-strength deformation-resistant connecting rods.

Description

Technical Field

[0001] This utility model relates to the field of engine technology, and in particular to a connecting rod and cylinder liner combination structure with high resistance to deformation. Background Technology

[0002] The cylinder liner is a critical component in an engine used to guide the piston, which reciprocates within the cylinder liner under the drive of the crankshaft. Cylinder liners are generally straight-tube structures, such as the cylinder liner structure disclosed in existing patent document CN119878389B. Existing cylinder liner designs cannot accommodate locally thickened connecting rod big ends, mainly because the thickened area interferes with the cylinder liner.

[0003] The above background information is provided only to aid in understanding the concept and technical solution of this utility model. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above information was disclosed on the filing date of this patent application, the above background information should not be used to evaluate the novelty and inventiveness of this application. Utility Model Content

[0004] The main purpose of this utility model is to propose a connecting rod and cylinder liner combination structure with high deformation resistance by assembling a high-strength connecting rod through a clearance groove in the cylinder liner.

[0005] Therefore, this utility model proposes a connecting rod and cylinder liner combination structure with high resistance to deformation.

[0006] Preferably, the present invention may also have the following technical features:

[0007] A connecting rod and cylinder liner assembly with high deformation resistance includes a cylinder liner, a connecting rod, and a piston. The connecting rod includes a rod body, a big end, a connecting rod cap, and a small end. The big end of the connecting rod is connected to a crankshaft, and the small end of the connecting rod is connected to the piston. The piston is slidably assembled within the cylinder liner. A clearance groove is formed at the lower end of the cylinder liner. The position of the clearance groove corresponds to the position of the big end of the connecting rod, and it is used to make way for the big end of the connecting rod. The length of the clearance groove is less than 30% of the length of the piston skirt.

[0008] Furthermore, the connecting rod big end includes a long arc arm and a short arc arm, the connecting rod cap is installed opposite the long arc arm, and the side of the long arc arm away from the connecting rod cap is provided with a thickened structure.

[0009] Furthermore, the thickened structure is a square rib.

[0010] Furthermore, the thickened structure is a semi-circular rib.

[0011] Furthermore, the thickened structure extends from the big end of the connecting rod to the shaft of the connecting rod.

[0012] Furthermore, the connecting rod big end is provided with an arc-shaped relief structure, and the arc-shaped relief structure is provided with an arc-shaped boss on its periphery.

[0013] Furthermore, the arc-shaped clearance structure is provided at the fracture point of the connecting rod cap and the connecting rod big end. The arc-shaped clearance structure is divided into two parts, which are respectively located at the connecting rod cap and the connecting rod big end.

[0014] Furthermore, the boss is provided at a second location and is located on the long arc arm.

[0015] The beneficial effects of this utility model compared with the prior art include: the relief groove can be designed as a rounded corner, square or irregular relief shape according to the shape of the tightening rib, ensuring that the cylinder liner's support strength for the piston is still sufficient after the relief is not made. Attached Figure Description

[0016] Figure 1 This is a partial sectional view of the present invention.

[0017] Figure 2 This is a schematic diagram of the connection rod big end and cylinder liner relief groove of this utility model.

[0018] Figure 3 This is a three-dimensional view of the connecting rod of this utility model.

[0019] Figure 4 This is an assembly drawing of the connecting rod big end and connecting rod cover of this utility model.

[0020] Figure 5 This is a perspective view of the present invention. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to specific embodiments and the accompanying drawings. It should be emphasized that the following description is merely exemplary and is not intended to limit the scope and application of the present invention.

[0022] Non-limiting and non-exclusive embodiments will be described with reference to the following figures, wherein the same reference numerals denote the same parts unless otherwise specifically stated.

[0023] like Figure 1-5The diagram illustrates a high-deformation-resistance connecting rod and cylinder liner assembly, comprising a cylinder liner 1, a connecting rod, and a piston. The connecting rod includes a rod body 2, a big end 3, a connecting rod cap 5, and a small end 4. The big end 3 connects to the crankshaft, and the small end 4 connects to the piston 6. The piston 6 is slidably assembled within the cylinder liner 1. A clearance groove 11 is provided at the lower end of the cylinder liner 1. The position of the clearance groove 11 corresponds to the position of the big end 3 of the connecting rod, providing clearance for the big end 3. By providing the clearance groove 11, the design margin of the connecting rod is wider, enabling it to accommodate connecting rods with stronger deformation resistance. Preferably, the length of the clearance groove 11 (axial length along the cylinder liner) is less than 30% of the length of the piston skirt 61, preventing the skirt 61 from breaking due to insufficient strength caused by the exposed portion of the cylinder liner. For example, assuming the length of the piston skirt 61 is B, and the length of the clearance groove 11 is A, i.e. Preferably, the piston 6 is made of steel or aluminum.

[0024] Preferably, the connecting rod big end 3 includes a long arc arm 34 and a short arc arm 35, and the connecting rod cover 5 is installed opposite the long arc arm 34. A thickening structure 31 is provided on the side of the long arc arm 34 away from the connecting rod cover 5. Optionally, the thickening structure 31 is a square rib or a semi-circular rib. The thickening structure 31 can be a convex rib structure of various shapes, the purpose of which is to improve the strength and deformation resistance of the connecting rod.

[0025] More specifically, the thickened structure 31 extends from the big end 3 of the connecting rod to the shaft 2 of the connecting rod. In this way, the thickened structure 31 can simultaneously strengthen the big end 3 and the shaft 2 of the connecting rod.

[0026] Furthermore, the connecting rod big end 3 is provided with an arc-shaped relief structure 33, and an arc-shaped boss 32 is provided around the arc-shaped relief structure 33. Preferably, the arc-shaped relief structure 33 is provided at the fracture point of the connecting rod cap 5 and the connecting rod big end 3. The arc-shaped relief structure 33 is divided into two parts, which are respectively located on the connecting rod cap 5 and the connecting rod big end 3. When the connecting rod cap 5 is assembled to the connecting rod big end 3, a complete arc-shaped relief structure 33 is formed. The arc-shaped relief structure 33 is a recessed structure. The fracture point of the connecting rod cap 5 and the connecting rod big end 3 is around the connecting joint surface of the connecting rod cap 5 and the connecting rod big end 3. Because of the recessed relief treatment at this point, the local strength is reduced, increasing the risk of deformation. Therefore, an arc-shaped boss 32 is designed around the arc-shaped relief structure 33 to strengthen the strength of the recessed area.

[0027] A second arc-shaped boss 32 is also provided on the big end 3 of the connecting rod, and the second arc-shaped boss 32 is provided on the long arc arm 34. The two arc-shaped bosses 32 work together to improve the strength of the big end 3 of the connecting rod and the connecting rod cap 5, and enhance the resistance to deformation.

[0028] Those skilled in the art will recognize that numerous variations are possible with respect to the above description, and the embodiments and figures are merely for describing one or more specific implementations.

[0029] Although exemplary embodiments of the present invention have been described and illustrated, those skilled in the art will understand that various changes and substitutions can be made thereto without departing from the spirit of the present invention. Furthermore, many modifications can be made to adapt specific situations to the doctrine of the present invention without departing from the central concept of the present invention described herein. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but may include all embodiments and equivalents that fall within the scope of the present invention.

Claims

1. A connecting rod and cylinder liner assembly structure with high deformation resistance, comprising a cylinder liner, a connecting rod, and a piston, wherein the connecting rod includes a rod body, a big end, a connecting rod cap, and a small end, the big end of the connecting rod being connected to a crankshaft, and the small end of the connecting rod being connected to the piston; the piston is slidably assembled within the cylinder liner; characterized in that: The lower end of the cylinder liner is provided with a relief groove; the position of the relief groove corresponds to the position of the big end of the connecting rod, and is used to make way for the big end of the connecting rod; the length of the relief groove is less than 30% of the length of the piston skirt.

2. The connecting rod and cylinder liner assembly structure with high deformation resistance as described in claim 1, characterized in that: The connecting rod big end includes a long arc arm and a short arc arm. The connecting rod cap is installed opposite the long arc arm, and the side of the long arc arm away from the connecting rod cap has a thickened structure.

3. The connecting rod and cylinder liner assembly structure with high deformation resistance as described in claim 2, characterized in that: The thickened structure is a square rib.

4. The connecting rod and cylinder liner assembly structure with high deformation resistance as described in claim 2, characterized in that: The thickened structure is a semi-circular rib.

5. The connecting rod and cylinder liner assembly structure with high deformation resistance as described in any one of claims 3 or 4, characterized in that: The thickened structure extends from the big end of the connecting rod to the shaft of the connecting rod.

6. The connecting rod and cylinder liner assembly structure with high deformation resistance as described in claim 1, characterized in that: The connecting rod big end is provided with an arc-shaped relief structure, and the arc-shaped relief structure is provided with an arc-shaped boss on its periphery.

7. The connecting rod and cylinder liner assembly structure with high deformation resistance as described in claim 6, characterized in that: The arc-shaped clearance structure is located at the fracture point of the connecting rod cap and the connecting rod big end. The arc-shaped clearance structure is divided into two parts, which are respectively located at the connecting rod cap and the connecting rod big end.

8. The connecting rod and cylinder liner assembly structure with high deformation resistance as described in claim 6, characterized in that: The boss has a second location and is located on the long arc arm.

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