Self-lubricating piston pin

Abstract

The utility model provides a self-lubricating piston pin, and belongs to the technical field of piston pins. An inner circular hole of the piston pin body is of a structure with two thin ends and a thick middle part, and can be used for operation of a piston by being connected with a connecting rod; the four oil guide grooves are formed in the circumferential surface of the piston pin body and can guide lubricating oil to the surface of the piston pin body; the four lubricating oil grooves are formed in the two ends of the piston pin body respectively, circular beads are arranged on the circumferential surfaces of the four oil guide grooves and the lubricating oil grooves, and lubricating oil can be guided into the piston pin body; the guide groove is formed in the piston pin body and can be used for storing lubricating oil; when lubricating oil is guided into the surface of the piston pin body, the oil storage groove can temporarily store the lubricating oil, and the lubricating oil overflowing from the oil storage groove flows into the piston pin body through the oil guide groove and the lubricating oil groove, so that the piston pin body does not need to be placed in the lubricating oil, and the surface of the piston pin body can be effectively lubricated.

Description

Technical Field

[0001] The utility model belongs to the technical field of piston pins, and particularly relates to a self-lubricating piston pin. Background Art

[0002] A piston pin is a cylindrical pin installed in the piston skirt. Its middle part passes through the small end hole of the connecting rod to connect the piston and the connecting rod. Its function is to transmit the gas force borne by the piston to the connecting rod, or to drive the piston to move together with the small end of the connecting rod. In order to reduce weight, piston pins are generally made of high-quality alloy steel and are made hollow.

[0003] The authorized publication number "CN209430300U" discloses "a piston pin, belonging to the technical field of automobile engines. It solves the problems of easy wear and short service life of the existing piston pins. This piston pin includes a piston pin body with a through hole inside. An oil storage groove is formed on one end face of the piston pin body. The inner cavity of the oil storage groove is in a two-stage stepped shape. A plurality of oil outlet holes are formed on the inner peripheral wall of the piston pin body at the through hole, which are arranged in pairs and communicated with the corresponding oil storage grooves. An annular plate fixedly connected to the oil storage groove and with one end face fitting the stepped surface in the oil storage groove is arranged in the oil storage groove. Two connecting holes one axially penetrating the annular plate are formed on the annular plate and are arranged oppositely. At both positions of the annular plate where the two connecting holes one are located, oil injection nozzles sealing the corresponding connecting holes one and fixedly connected to the annular plate are arranged. A sealing ring plate sealing the opening of the oil storage groove and fixedly connected to the oil storage groove is also arranged in the oil storage groove. The utility model has the advantages of lubrication function, reduced wear and long service life".

[0004] The above patent has the advantages of lubrication function, reduced wear and long service life. However, when the piston pin body in the prior art is used, it is necessary to place the piston pin body in lubricating oil and then install the piston pin body on the connecting rod, which causes trouble for workers during operation. Content of the Utility Model

[0005] The purpose of the utility model is to provide a self-lubricating piston pin, aiming to solve the problem that when the piston pin body in the prior art is used, it is necessary to place the piston pin body in lubricating oil and then install the piston pin body on the connecting rod, which causes trouble for workers during operation.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A self-lubricating piston pin, comprising:

[0008] A piston pin body, the inner circular hole of the piston pin body is of a structure that is thin at both ends and thick in the middle;

[0009] Four oil guiding grooves, formed on the circumferential surface of the piston pin body;

[0010] Four lubricating oil grooves are respectively opened at both ends of the piston pin body, and rounded corners are provided on the circumferential surfaces of the four oil guiding grooves and the lubricating oil grooves;

[0011] An oil guiding groove is opened in the piston pin body;

[0012] Two oil storage grooves are opened on the circumferential surface of the piston pin body, and rounded corners are provided on the surfaces of the two oil storage grooves;

[0013] Four fixing plates are fixedly connected inside the piston pin body.

[0014] As a preferred solution of the present utility model, pinch pieces are fixedly connected to both ends of the piston pin body.

[0015] As a preferred solution of the present utility model, two connecting grooves are fixedly connected to the circumferential inner wall of the piston pin body.

[0016] As a preferred solution of the present utility model, the four oil guiding grooves are connected to the lubricating oil grooves, and the oil guiding grooves are connected to the surface of the piston pin body.

[0017] As a preferred solution of the present utility model, the oil guiding groove is spiral, and the four lubricating oil grooves are connected to the inside of the piston pin body.

[0018] As a preferred solution of the present utility model, the oil guiding groove is connected to the lubricating oil groove.

[0019] Compared with the prior art, the beneficial effects of the present utility model are:

[0020] 1. In this solution, when lubricating oil is introduced onto the surface of the piston pin body, the oil storage groove can temporarily store the lubricating oil, and the lubricating oil overflowing from the oil storage groove flows into the piston pin body through the oil guiding groove and the lubricating oil groove. Therefore, there is no need to place the piston pin body in the lubricating oil, and the surface of the piston pin body can be effectively lubricated.

[0021] 2. In this solution, the fixing plates provided inside the piston pin body can increase the compressive strength of the piston pin body. The pinch pieces provided at both ends of the piston pin body can facilitate the worker to pick up the piston pin body and prevent the piston pin body from falling. The connecting grooves provided inside the piston pin body can facilitate the worker to take out the piston pin body. Description of the Drawings

[0022] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. They are used together with the embodiments of the present utility model to explain the present utility model, and do not constitute a limitation to the present utility model. In the drawings:

[0023] Figure 1 is the first perspective three-dimensional view of the present utility model;

[0024] Figure 2 This is a cross-sectional view of the present utility model;

[0025] Figure 3 This is a three-dimensional view of the second perspective of the present utility model;

[0026] Figure 4 This is a three-dimensional view of the third perspective of the present utility model.

[0027] In the figure: 1. Piston pin body; 2. Oil storage groove; 3. Oil guiding groove; 4. Lubricating oil groove; 5. Pinch piece; 6. Fixed plate; 7. Connecting groove; 8. Guide groove. Specific embodiments

[0028] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0029] Embodiment 1

[0030] Please refer to Figures 1-4 , the present utility model provides the following technical solutions:

[0031] A self-lubricating piston pin, comprising:

[0032] The piston pin body 1, the inner circular hole of the piston pin body 1 is of a structure that is thin at both ends and thick in the middle, and can be used for the operation of the piston by connecting with the connecting rod;

[0033] Four oil guiding grooves 3 are opened on the circumferential surface of the piston pin body 1, and can guide lubricating oil onto the surface of the piston pin body 1;

[0034] Four lubricating oil grooves 4 are respectively opened at both ends of the piston pin body 1, and the circumferential surfaces of the four oil guiding grooves 3 and the lubricating oil grooves 4 are provided with rounded corners, and can guide lubricating oil into the piston pin body 1;

[0035] The guide groove 8 is opened in the piston pin body 1 and can be used for storing lubricating oil;

[0036] Two oil storage grooves 2 are opened on the circumferential surface of the piston pin body 1, and the surfaces of the two oil storage grooves 2 are provided with rounded corners and can be used for storing lubricating oil;

[0037] Four fixed plates 6 are fixedly connected to the inside of the piston pin body 1 and can increase the strength of the piston pin body 1.

[0038] Such as Figure 2As shown, pinch pieces 5 are fixedly connected to both ends of the piston pin body 1, which can increase the friction effect between the piston pin body 1 and the hand, avoiding slippage when picking up the piston pin body 1.

[0039] As Figure 2 shown, two connecting grooves 7 are fixedly connected to the circumferential inner wall of the piston pin body 1, and the piston pin body 1 can be taken out by a hook.

[0040] As Figure 2 shown, four oil guiding grooves 3 are connected to the lubricating oil groove 4, which can guide the lubricating oil on the surface of the piston pin body 1 into the piston pin body 1. The oil guiding grooves 3 are interconnected with the surface of the piston pin body 1, and the lubricating oil can slide into the piston pin body 1 through the oil guiding grooves 3 and the lubricating oil groove 4.

[0041] As Figure 2 shown, the guiding groove 8 is spiral, which can guide the lubricating oil in the piston pin body 1 into the lubricating oil groove 4. The four lubricating oil grooves 4 are connected to the inside of the piston pin body 1, and the lubricating oil on the surface of the piston pin body 1 can enter the piston pin body 1.

[0042] As Figure 2 shown, the guiding groove 8 is interconnected with the lubricating oil groove 4, which can guide the lubricating oil stored in the guiding groove 8 to the surface of the lubricating oil groove 4.

[0043] The working principle and usage process of the present utility model: When the lubricating oil is introduced onto the surface of the piston pin body 1, the oil storage groove 2 can temporarily store the lubricating oil. The lubricating oil overflowing from the oil storage groove 2 flows into the piston pin body 1 through the oil guiding groove 3 and the lubricating oil groove 4. Thus, there is no need to place the piston pin body 1 in the lubricating oil, and the surface of the piston pin body 1 can be effectively lubricated.

[0044] Finally, it should be noted that: The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A self-lubricating piston pin, characterized in that: include: A piston pin body (1), wherein the inner circular hole of the piston pin body (1) is a structure with thin ends and thick middle; Four oil guide grooves (3) are formed on the circumferential surface of the piston pin body (1); Four lubricating oil grooves (4) are respectively provided at two ends of the piston pin body (1), and the circumferential surfaces of the four oil guide grooves (3) and the lubricating oil grooves (4) are provided with rounded corners; A guide groove (8) is provided in the piston pin body (1); Two oil storage grooves (2) are formed on the circumferential surface of the piston pin body (1), and the surfaces of the two oil storage grooves (2) are provided with rounded corners; Four fixing plates (6) are fixedly connected inside the piston pin body (1).

2. A self-lubricating piston pin according to claim 1, characterized in that: Both ends of the piston pin body (1) are fixedly connected with pinching pieces (5).

3. A self-lubricating piston pin according to claim 2, characterized in that: The circumferential inner wall of the piston pin body (1) is fixedly connected with two connection grooves (7).

4. A self-lubricating piston pin according to claim 3, characterized in that: The four oil guide grooves (3) are connected to the lubricating oil groove (4), and the oil guide groove (3) is connected to the surface of the piston pin body (1).

5. A self-lubricating piston pin according to claim 4, characterized in that: The guide groove (8) is spiral-shaped, and the four lubricating oil grooves (4) are connected to the inside of the piston pin body (1).

6. A self-lubricating piston pin according to claim 5, characterized in that: The guide groove (8) and the lubricating oil groove (4) are connected to each other.

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