CN-224214261-U - Self-lubricating crankshaft connecting rod assembly

Abstract

The utility model discloses a self-lubricating crankshaft connecting rod assembly, which belongs to the technical field of crank connecting rod mechanisms and comprises a crankshaft part and a connecting rod part which are rotationally connected, wherein the crankshaft part comprises a crankshaft body and a metal sleeve fixedly sleeved outside the crankshaft body, the outer surface wall of the metal sleeve is provided with an integrally formed convex ring, the connecting rod part comprises a large end formed by combining an upper bearing bush and a lower bearing bush, the inner side walls of the upper bearing bush and the lower bearing bush are both provided with metal wear plates, two metal wear plates are provided with rotary grooves matched with the convex ring, and the inside of the lower bearing bush is provided with a lubricating structure.

Inventors

• LI CHUNLIN
• SHEN FU

Assignees

• 上海海立铸造有限公司

Dates

Publication Date

20260508

Application Date

20250618

Claims (6)

1. 1. The self-lubricating crankshaft connecting rod assembly is characterized by comprising a crankshaft part and a connecting rod part which are rotationally connected, wherein the crankshaft part comprises a crankshaft body (8) and a metal sleeve (9) fixedly sleeved outside the crankshaft body (8), an integrally formed convex ring (10) is arranged on the outer surface wall of the metal sleeve (9), the connecting rod part comprises a large end head (4) formed by combining an upper bearing bush (41) and a lower bearing bush (42), metal wear plates (424) are respectively arranged on the inner side walls of the upper bearing bush (41) and the lower bearing bush (42), rotating grooves (421) matched with the convex ring (10) are formed in the two metal wear plates (424), and a lubricating structure is arranged inside the lower bearing bush (42).
2. 2. A self-lubricating crankshaft connecting rod assembly as set forth in claim 1, wherein the crankshaft part further comprises two balancing weights (1) and a balancing shaft (5) connected to one side of the two balancing weights (1), and the crankshaft body (8) is connected between the two balancing weights (1).
3. 3. The self-lubricating crankshaft connecting rod assembly of claim 1, wherein the connecting rod part further comprises a connecting rod (2) and a small end head (3), the small end head (3) is arranged at the top end of the connecting rod (2), the upper bearing bush (41) is arranged at the bottom of the connecting rod (2), and the small end head (3) is of a circular ring structure.
4. 4. The self-lubricating crankshaft connecting rod assembly according to claim 1, wherein the two sides of the upper bearing bush (41) and the lower bearing bush (42) are respectively provided with a connecting part (7), threaded holes are formed in the connecting parts (7), and fixing bolts (6) are screwed between the corresponding two connecting parts (7).
5. 5. The self-lubricating crankshaft connecting rod assembly of claim 1, wherein the lubricating structure comprises an oil storage cavity (423) formed in the lower bearing bush (42), and an oil outlet (425) communicated with the oil storage cavity (423) is formed in one of the metal wear plates (424).
6. 6. The self-lubricating crankshaft connecting rod assembly according to claim 1, wherein an oil inlet pipe (422) communicated with the oil storage cavity (423) is arranged at the bottom of the lower bearing bush (42), and a sealing cover is screwed on the oil inlet pipe (422).

Description

Self-lubricating crankshaft connecting rod assembly Technical Field The utility model belongs to the technical field of crank connecting rod mechanisms, and particularly relates to a self-lubricating crankshaft connecting rod assembly. Background The crank connecting rod mechanism is used for providing a combustion place, converting the expansion pressure of the gas generated after the fuel is combusted on the piston top into the rotating torque of the crankshaft body and continuously outputting power, and generally consists of a machine body group, a piston connecting rod group and a crankshaft body flywheel group. In the Chinese utility model of patent CN202320549009.2, the patent name is self-lubricating crankshaft connecting rod assembly, the self-lubricating effect on the transmission fit connection part of the crankshaft body connecting rod and the crankshaft body main body journal can be effectively realized through the structural design of the lubricating component by arranging the lubricating component on the wear-resistant metal plate, however, the lubricating component in the patent is in a convex state, and the lubricating ball can also be pressed downwards in the rotating process of the crankshaft body connecting rod, so that the rotating stability of the crankshaft body connecting rod is influenced, and the service life of the crankshaft connecting rod is further influenced. Disclosure of utility model The utility model aims to provide a self-lubricating crankshaft connecting rod assembly, which solves the problems in the prior art. The self-lubricating crankshaft connecting rod assembly comprises a crankshaft part and a connecting rod part which are rotationally connected, wherein the crankshaft part comprises a crankshaft body and a metal sleeve fixedly sleeved outside the crankshaft body, an integrally formed convex ring is arranged on the outer surface wall of the metal sleeve, the connecting rod part comprises a large end formed by combining an upper bearing bush and a lower bearing bush, metal wear plates are arranged on the inner side walls of the upper bearing bush and the lower bearing bush, rotating grooves matched with the convex ring are formed in the two metal wear plates, and a lubricating structure is arranged inside the lower bearing bush. Preferably, the crankshaft part further comprises two balancing weights and a balancing shaft connected to one side of the two balancing weights, and the crankshaft body is connected between the two balancing weights. Preferably, the connecting rod part further comprises a connecting rod and a small end, the small end is arranged at the top end of the connecting rod, the upper bearing bush is arranged at the bottom of the connecting rod, and the small end is of a circular ring structure. Preferably, the two sides of the upper bearing bush and the lower bearing bush are respectively provided with a connecting part, threaded holes are formed in the connecting parts, and fixing bolts are screwed between the corresponding two connecting parts. Preferably, the lubricating structure comprises an oil storage cavity formed in the lower bearing bush, and one of the metal wear plates is provided with an oil outlet communicated with the oil storage cavity. Preferably, an oil inlet pipe communicated with the oil storage cavity is arranged at the bottom of the lower bearing bush, and a sealing cover is screwed on the oil inlet pipe. Compared with the prior art, the utility model has the beneficial effects that: (1) According to the utility model, the rotating groove and the metal sleeve with the convex ring are arranged, the convex ring on the metal sleeve is matched with the rotating groove on the metal wear-resisting plate, and the connecting rod rotates on the crankshaft body, so that the rotating groove rotates on the convex ring, the limiting effect is achieved to a certain extent, the rotating stability of the connecting rod is ensured, and the service life of the connecting rod of the crankshaft body is prolonged. (2) According to the utility model, the oil storage cavity is arranged in the lower bearing bush, the oil inlet pipe communicated with the oil storage cavity is arranged, the oil outlet is arranged on the metal wear-resisting plate of the lower bearing bush, and lubricating oil in the oil storage cavity is discharged from the oil outlet in the rotation process of the connecting rod, so that the connecting rod of the crankshaft body is lubricated. Drawings FIG. 1 is a schematic diagram of the structure of the present utility model; FIG. 2 is a schematic view of the structure of the connecting rod portion of the present utility model; FIG. 3 is an enlarged view at A in FIG. 2; FIG. 4 is a perspective view of a lower bushing of the present utility model; fig. 5 is a schematic structural view of a crankshaft body according to the present utility model. The drawing shows that the device comprises a 1-balance block, a 2-connecting rod, a 3-smal