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 crankshaft connecting rod mechanisms and comprises a crankshaft part and a connecting rod part which are rotatably connected, the crankshaft part comprises a crankshaft body and a metal sleeve fixedly sleeved outside the crankshaft body, and 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-resisting plates are installed on the inner side wall of the upper bearing bush and the inner side wall of the lower bearing bush, rotating grooves matched with the protruding rings are formed in the two metal wear-resisting plates, and a lubricating structure is arranged in the lower bearing bush. According to the crankshaft, 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 in 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, and the rotating stability of the connecting rod is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the technical field of crank-connecting rod mechanism, specifically relating to a self-lubricating crankshaft connecting rod assembly. Background Technology

[0002] The function of the crankshaft and connecting rod mechanism is to provide a combustion environment and convert the expansion pressure of the gas after fuel combustion onto the piston top into the torque of the crankshaft body rotation, continuously outputting power. It is generally composed of three parts: the engine block assembly, the piston and connecting rod assembly, and the crankshaft body and flywheel assembly.

[0003] In Chinese utility model patent CN202320549009.2, entitled "A Self-Lubricating Crankshaft Connecting Rod Assembly," a lubrication component is provided on a wear-resistant metal plate. Through the structural design of the lubrication component, a self-lubricating effect can be effectively achieved between the crankshaft connecting rod and the crankshaft main journal transmission connection. However, in this patent, the lubrication ball of the lubrication component is in a protruding state. During the rotation of the crankshaft connecting rod, the lubrication ball will also be pressed downward, thereby affecting the stability of the crankshaft connecting rod rotation and thus affecting the service life of the crankshaft connecting rod. Utility Model Content

[0004] The purpose of this invention is to provide a self-lubricating crankshaft connecting rod assembly to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a self-lubricating crankshaft connecting rod assembly, comprising a crankshaft portion and a connecting rod portion rotatably connected. The crankshaft portion includes a crankshaft body and a metal sleeve fixedly sleeved on the outside of the crankshaft body. An integrally formed convex ring is formed on the outer wall of the metal sleeve. The connecting rod portion includes a large end formed by an upper bearing and a lower bearing. Metal wear-resistant plates are installed on the inner sidewalls of both the upper and lower bearings. Rotary grooves that cooperate with the convex ring are formed on the two metal wear-resistant plates. A lubrication structure is provided inside the lower bearing.

[0006] Preferably, the crankshaft section further includes two balance weights and a balance shaft connected to one side of the two balance weights, and the crankshaft body is connected between the two balance weights.

[0007] Preferably, the connecting rod portion further includes a connecting rod and a small end, the small end being installed at the top of the connecting rod and the upper bearing being installed at the bottom of the connecting rod, the small end being a ring-shaped structure.

[0008] Preferably, both sides of the upper and lower bearing bushes are provided with connecting parts, and threaded holes are opened in the connecting parts, and fixing bolts are screwed between the two connecting parts.

[0009] Preferably, the lubrication structure includes an oil reservoir formed in the lower bearing bush, wherein an oil outlet hole communicating with the oil reservoir is provided on one of the metal wear-resistant plates.

[0010] Preferably, the bottom of the lower bearing is provided with an oil inlet pipe communicating with the oil storage chamber, and a sealing cap is screwed onto the oil inlet pipe.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] (1) This utility model sets a rotating groove and a metal sleeve with a convex ring. The convex ring on the metal sleeve cooperates with the rotating groove on the metal wear-resistant plate. The connecting rod rotates on the crankshaft body, so that the rotating groove rotates on the convex ring, which plays a certain role in limiting the position, ensuring the stability of the connecting rod rotation, and extending the service life of the crankshaft body and connecting rod.

[0013] (2) This utility model provides an oil storage chamber in the lower bearing shell and an oil inlet pipe that communicates with the oil storage chamber. The metal wear-resistant plate of the lower bearing shell has an oil outlet hole. During the rotation of the connecting rod, the lubricating oil in the oil storage chamber is discharged from the oil outlet hole, thereby lubricating the crankshaft body connecting rod. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the connecting rod part of this utility model;

[0016] Figure 3 for Figure 2 Enlarged view of point A in the image;

[0017] Figure 4 This is a perspective view of the lower bearing shell of this utility model;

[0018] Figure 5 This is a schematic diagram of the crankshaft body of this utility model.

[0019] In the diagram: 1-Balance block; 2-Connecting rod; 3-Small end; 4-Large end; 41-Upper bearing; 42-Lower bearing; 421-Rotating groove; 422-Oil inlet pipe; 423-Oil reservoir; 424-Metal wear-resistant plate; 425-Oil outlet hole; 5-Balance shaft; 6-Fixing bolt; 7-Connecting part; 8-Crankshaft body; 9-Metal sleeve; 10-Convex ring. Detailed Implementation

[0020] 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.

[0021] Please see Figures 1-5 As shown, this utility model provides the following technical solution: a self-lubricating crankshaft connecting rod assembly, including a crankshaft part and a connecting rod part rotatably connected. The crankshaft part includes a crankshaft body 8 and a metal sleeve 9 fixedly sleeved on the outside of the crankshaft body 8. The outer wall of the metal sleeve 9 is provided with an integrally formed convex ring 10. The connecting rod part includes a large end 4 composed of an upper bearing shell 41 and a lower bearing shell 42. The inner sidewalls of the upper bearing shell 41 and the lower bearing shell 42 are both equipped with metal wear-resistant plates 424. The two metal wear-resistant plates 424 are provided with rotating grooves 421 that cooperate with the convex ring 10. The lower bearing shell 42 is provided with a lubrication structure inside.

[0022] The lubrication structure includes an oil reservoir 423 formed in the lower bearing shell 42, and an oil outlet 425 communicating with the oil reservoir 423 is provided on a metal wear-resistant plate 424.

[0023] In response to the above, when installing the self-lubricating crankshaft body connecting rod assembly, the large end 4 composed of the upper bearing 41 and the lower bearing 42 is fitted onto the outside of the crankshaft body 8, so that the groove 421 on the inner metal wear plate 424 of the upper bearing 41 and the lower bearing 42 matches the convex ring 10 on the metal sleeve 9, and the upper bearing 41 and the lower bearing 42 are fixed in place.

[0024] When rotating, the connecting rod rotates on the crankshaft, the large end 4 rotates on the crankshaft body 8, and the rotating groove 421 rotates on the convex ring 10, which plays a limiting role and ensures the stability of the crankshaft connecting rod mechanism rotation.

[0025] Because the oil reservoir 423 has a semi-annular structure and the oil outlet 425 is located at the bottom of the semi-annular structure, it facilitates the seepage of lubricating oil, which can lubricate the crankshaft connecting rod during rotation and extend the service life of the crankshaft connecting rod.

[0026] Specifically, such as Figure 1 As shown, in this utility model, the crankshaft part also includes two balance blocks 1 and a balance shaft 5 connected to one side of the two balance blocks 1. The crankshaft body 8 is connected between the two balance blocks 1. The balance shaft 5 is used to install the crankshaft connecting rod mechanism. The balance blocks 1 play a balancing role when the crankshaft connecting rod mechanism rotates, ensuring the balance of the crankshaft connecting rod when it rotates.

[0027] Specifically, such as Figure 1 and Figure 2As shown, in this utility model, the connecting rod part also includes a connecting rod 2 and a small end 3. The small end 3 is installed at the top of the connecting rod 2, and the upper bearing 41 is installed at the bottom of the connecting rod 2. The small end 3 has a ring-shaped structure. The small end 3 is used to fix and connect with the piston. The connecting rod 2, the upper bearing 41, and the small end 3 are integrally formed.

[0028] Preferred, such as Figure 2 As shown, in this utility model, both sides of the upper bearing shell 41 and the lower bearing shell 42 are provided with connecting parts 7, and threaded holes are opened in the connecting parts 7. Fixing bolts 6 are screwed between the two connecting parts 7. The connecting parts 7 on both sides of the upper bearing shell 41 correspond to the connecting parts 7 on both sides of the lower bearing shell 42. The upper bearing shell 41 and the lower bearing shell 42 are placed on the outside of the crankshaft body 8, and the threaded holes are aligned so that the fixing bolts 6 are screwed into the threaded holes, thereby installing the upper bearing shell 41 and the lower bearing shell 42 securely.

[0029] In addition, such as Figures 2-4 As shown, in this utility model, the bottom of the lower bearing 42 is provided with an oil inlet pipe 422 that communicates with the oil storage cavity 423. A sealing cap is screwed onto the oil inlet pipe 422. By unscrewing the sealing cap, lubricating oil can be added to the oil storage cavity 423 through the oil inlet pipe 422.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-lubricating crankshaft connecting rod assembly, characterized in that: The device includes a crankshaft section and a connecting rod section that are rotatably connected. The crankshaft section includes a crankshaft body (8) and a metal sleeve (9) that is fixedly sleeved on the outside of the crankshaft body (8). The outer wall of the metal sleeve (9) is provided with an integrally formed convex ring (10). The connecting rod section includes a large end (4) composed of an upper bearing shell (41) and a lower bearing shell (42). The inner sidewalls of the upper bearing shell (41) and the lower bearing shell (42) are both equipped with metal wear-resistant plates (424). The two metal wear-resistant plates (424) are provided with rotating grooves (421) that cooperate with the convex ring (10). The lower bearing shell (42) is provided with a lubrication structure inside.

2. The self-lubricating crankshaft connecting rod assembly according to claim 1, characterized in that: The crankshaft section also includes two balance blocks (1) and a balance shaft (5) connected to one side of the two balance blocks (1), and the crankshaft body (8) is connected between the two balance blocks (1).

3. The self-lubricating crankshaft connecting rod assembly according to claim 1, characterized in that: The connecting rod section also includes a connecting rod (2) and a small end (3). The small end (3) is installed at the top of the connecting rod (2), and the upper bearing (41) is installed at the bottom of the connecting rod (2). The small end (3) is a ring-shaped structure.

4. The self-lubricating crankshaft connecting rod assembly according to claim 1, characterized in that: Both sides of the upper bearing (41) and the lower bearing (42) are provided with connecting parts (7), and threaded holes are opened in the connecting parts (7). Fixing bolts (6) are screwed between the two connecting parts (7).

5. A self-lubricating crankshaft connecting rod assembly according to claim 1, characterized in that: The lubrication structure includes an oil reservoir (423) formed in the lower bearing (42), and an oil outlet (425) communicating with the oil reservoir (423) is provided on one of the metal wear-resistant plates (424).

6. The self-lubricating crankshaft connecting rod assembly according to claim 1, characterized in that: The bottom of the lower bearing (42) is provided with an oil inlet pipe (422) that communicates with the oil storage chamber (423), and a sealing cap is screwed onto the oil inlet pipe (422).

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