Motorcycle crankshaft connecting rod assembly

Abstract

The crankshaft connecting rod assembly comprises a left crank and a right crank, a crank pin is arranged between the left crank and the right crank, a left crank hole is formed in the left crank, a right crank hole is formed in the right crank, a connecting rod is arranged on the crank pin, a large end hole is formed in the head of the connecting rod, and a needle bearing is arranged in the large end hole. An axially-arranged through main channel is arranged in the crank pin, a vertical oil hole and an inclined oil hole are formed in the side wall of the main channel, a first oil plug is arranged at one end of the main channel, a second oil plug is arranged at the other end of the main channel, an axially-arranged crankshaft oil channel and an obliquely-arranged bypass oil channel are arranged in the right crank, and the bypass oil channel is communicated with the crankshaft oil channel and the inclined oil hole. According to the crankshaft connecting rod assembly of the motorcycle, oil impurities are filtered through the eccentric lubricating system, the cleanliness of the lubricating system of the crankshaft connecting rod assembly of the motorcycle is improved, a good lubricating and cooling system is ensured, and performance reduction caused by friction and heat accumulation is reduced.

Description

Technical Field

[0001] This utility model relates to a motorcycle component, and more specifically, a motorcycle crankshaft connecting rod component. Background Technology

[0002] The motorcycle crankshaft connecting rod assembly typically consists of a crank, crank pin, connecting rod, bearings, and other parts. The connecting rod, driven by the piston to produce linear motion, then drives the crankshaft to rotate, generating axial motion, thus converting mechanical energy into kinetic energy. Because the motorcycle crankshaft connecting rod assembly operates at high speeds, it requires a stable lubrication system. Therefore, the assembly has high cleanliness requirements. Under high-speed rotation and friction, impurities generated by grinding will accumulate in the oil passages. To address this, improvements need to be made to the oil filtration system of the crankshaft connecting rod assembly. Utility Model Content

[0003] Therefore, it is necessary to provide a motorcycle crankshaft connecting rod assembly to address the aforementioned technical problems.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A motorcycle crankshaft connecting rod assembly, characterized in that the motorcycle crankshaft connecting rod assembly includes a left crank and a right crank, a crank pin is provided between the left crank and the right crank, the left crank has a left crank hole, and the right crank has a right crank hole.

[0006] The crank pin is equipped with a connecting rod, the head of the connecting rod has a large end hole, and a needle roller bearing is installed in the large end hole.

[0007] The crank pin has an axially arranged through main channel. The sidewall of the main channel has vertical oil holes and oblique oil holes. One end of the main channel has a first oil plug, and the other end has a second oil plug.

[0008] The right crankshaft is provided with an axially arranged crankshaft oil passage and an inclined bypass oil passage. The bypass oil passage is connected to the crankshaft oil passage and the inclined oil hole.

[0009] The oblique oil hole, bypass oil passage and crankshaft oil passage constitute a lubrication system, which lubricates the large end bore and needle roller bearing through the oil hole.

[0010] In a preferred embodiment of the present invention, the first oil plug and the second oil plug are U-shaped, the first oil plug has a first eye hole in the middle, and the second oil plug has a second eye hole in the middle.

[0011] In a preferred embodiment of this utility model, the main channel is eccentrically disposed inside the crank pin, and the eccentric thickness ratio C:B of the main channel is 1.8:1.

[0012] In a preferred embodiment of this utility model, the crank pin and the left crank hole and right crank hole are both interference fit.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] This utility model provides a motorcycle crankshaft connecting rod assembly. The motorcycle crankshaft connecting rod assembly provides a lubrication system through an eccentric main channel and a double oil plug structure. The eccentric lubrication system filters oil impurities in the centrifugal direction, improves the cleanliness of the motorcycle crankshaft connecting rod assembly lubrication system, ensures a good lubrication and cooling system, reduces performance degradation caused by friction and heat accumulation, and ensures the stability and durability of the motorcycle crankshaft connecting rod assembly under complex working conditions. Attached Figure Description

[0015] To more clearly illustrate the solutions in this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of the motorcycle crankshaft connecting rod assembly of this utility model;

[0017] Figure 2 for Figure 1 A schematic diagram of the lubrication system structure of the crankshaft connecting rod assembly in a motorcycle.

[0018] Figure 3 for Figure 1 A schematic diagram of the cross-sectional structure of the crank pin in the motorcycle crankshaft connecting rod assembly.

[0019] Figure 4 for Figure 3 A cross-sectional view of the crank pin along line AA;

[0020] The markings in the diagram are explained as follows: 1. Left crank; 1-1. Left crank bore; 10. Large end bore; 14. First oil plug; 15. Second oil plug; 18. First eye hole; 19. Second eye hole; 2. Right crank; 2-1. Right crank bore; 3. Connecting rod; 5. Crank pin; 51. Main channel; 6. Needle roller bearing; K. Inclined oil hole; M. Lubrication system; Q. Crankshaft oil passage; R. Bypass oil passage; X. Vertical oil hole. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0022] The motorcycle crankshaft connecting rod assembly includes a left crank 1 and a right crank 2, with a crank pin 5 between the left crank 1 and the right crank 2. The left crank 1 has a left crank hole 1-1, and the right crank 2 has a right crank hole 2-1.

[0023] The crank pin 5 is provided with a connecting rod 3, the head of the connecting rod 3 is provided with a large end hole 10, and a needle roller bearing 6 is provided in the large end hole 10.

[0024] The crank pin 5 has an axially arranged through main channel 51. The side wall of the main channel 51 has a vertical oil hole X and an oblique oil hole K. One end of the main channel 51 has a first oil plug 14 and the other end of the main channel 51 has a second oil plug 15.

[0025] The right crank 2 is provided with an axially arranged crankshaft oil passage Q and an inclined bypass oil passage R. The bypass oil passage R is connected to the crankshaft oil passage Q and the inclined oil hole K.

[0026] The inclined oil hole K, the bypass oil passage R, and the crankshaft oil passage Q constitute the lubrication system M. The lubrication system M lubricates the large end hole 10 and the needle roller bearing 6 through the oil hole X.

[0027] The first oil plug 14 and the second oil plug 15 are U-shaped. The first oil plug 14 has a first eye hole 18 in the middle, and the second oil plug 15 has a second eye hole 19 in the middle.

[0028] It should be noted that, as Figure 3 As shown, the main channel 51 is eccentrically disposed inside the crank pin 5, and the eccentric thickness ratio C:B of the main channel 51 is 1.8:1.

[0029] In addition, the crank pin 5 is interference-fitted with both the left crank hole 1-1 and the right crank hole 2-1.

[0030] The working principle of the crankshaft connecting rod assembly of this motorcycle is explained below.

[0031] When the connecting rod drives the left crank 1 and right crank 2 to rotate at high speed, the lubrication system M uses the crankshaft oil passage Q and the bypass oil passage R to provide lubricating oil to the inclined oil hole K. The lubricating oil then enters the main channel 51 and, under the action of high-speed rotation and centrifugal force, enters the oil hole to lubricate the large end hole 10 of the connecting rod and the needle roller bearing 6. Under the action of centrifugal force, impurities accumulate in the middle of the main channel 51 and are thrown out from the first eye hole 18 of the first oil plug 14 and the second eye hole 19 of the second oil plug 15 at both ends.

[0032] This motorcycle crankshaft connecting rod assembly provides a lubrication system through an eccentric main channel and a double oil plug structure. The eccentric lubrication system filters oil impurities in a centrifugal direction, improving the cleanliness of the motorcycle crankshaft connecting rod assembly lubrication system, ensuring a good lubrication and cooling system, reducing performance degradation caused by friction and heat accumulation, and ensuring the stability and durability of the motorcycle crankshaft connecting rod assembly under complex working conditions.

[0033] Obviously, the embodiments described above are only some embodiments of this application, and not all embodiments. The accompanying drawings show preferred embodiments of this application, but do not limit the patent scope of this application.

Claims

1. A motorcycle crankshaft connecting rod assembly, characterized by, The motorcycle crank connecting rod assembly comprises a left crank (1) and a right crank (2), a crank pin (5) is arranged between the left crank (1) and the right crank (2), a left crank hole (1-1) is arranged on the left crank (1), and a right crank hole (2-1) is arranged on the right crank (2), A connecting rod (3) is arranged on the crank pin (5), a large end hole (10) is arranged at a head of the connecting rod (3), and a needle bearing (6) is arranged in the large end hole (10), The crank pin (5) is provided with an axially arranged through main channel (51), the side wall of the main channel (51) is provided with a vertical oil hole (X) and an inclined oil hole (K), one end of the main channel (51) is provided with a first oil plug (14), and the other end of the main channel (51) is provided with a second oil plug (15), The right crank (2) is provided with an axially arranged crankshaft oil channel (Q) and an obliquely arranged bypass oil channel (R), the bypass oil channel (R) is in communication with the crankshaft oil channel (Q) and the inclined oil hole (K), The inclined oil hole (K), the bypass oil channel (R) and the crankshaft oil channel (Q) constitute a lubricating system (M), and the lubricating system (M) lubricates the large end hole (10) and the needle bearing (6) through the oil hole (X).

2. The motorcycle crankshaft connecting rod assembly of claim 1 wherein, The first oil plug (14) and the second oil plug (15) are U-shaped, the first oil plug (14) is provided with a first eye hole (18) in the middle, and the second oil plug (15) is provided with a second eye hole (19) in the middle.

3. The motorcycle crankshaft connecting rod assembly of claim 1 wherein, The main channel (51) is eccentrically arranged in the crank pin (5), and the eccentric thickness ratio C:B of the main channel (51) is 1.8:

1.

4. The motorcycle crankshaft connecting rod assembly of claim 1 wherein, The crank pin (5) is in interference fit with the left crank hole (1-1) and the right crank hole (2-1).

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