Oil storage piston pin

Abstract

The utility model relates to the technical field of piston pins, in particular to an oil storage piston pin. The piston pin comprises an axial through pin body and nylon plugs arranged at the two ends of the pin body, screw abutting holes are formed in the outer diameters of the two ends of the pin body, an oil outlet hole is further formed in the outer diameter of the pin body, and the oil outlet hole is communicated with an inner cavity of the pin body; the screw abutting hole is not communicated with the inner cavity of the pin body. According to the oil storage piston pin with the design, the oil seal of the needle bearing is reduced, so that the oil storage piston pin is in a self-oil-feeding and long-term stable oil outlet state, and the service life of the oil storage piston pin is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of piston pin technology, and in particular to an oil storage piston pin. Background Technology

[0002] A piston pin is a cylindrical pin mounted on the piston skirt. Its center passes through the connecting rod small end bore to connect the piston and connecting rod. Its function is to transmit the gas force acting on the piston to the connecting rod, or to cause the connecting rod small end to move along with the piston. During motor operation, the motor drives the crank to rotate, which in turn drives the two connecting rods in a cyclical motion, causing the piston pin and needle roller bearing to rotate relative to each other.

[0003] Currently, ordinary bearings rely on oil injection for needle roller bearings, and then seal them with oil seals. When the oil seals age, oil leakage occurs, resulting in a shorter lifespan. Utility Model Content

[0004] To solve the above-mentioned technical problems, the purpose of this utility model is to provide an oil storage piston pin. This oil storage piston pin design reduces the oil seal of the needle roller bearing, enabling it to self-supply oil and maintain a stable oil output state for a long time, thus extending its service life.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An oil storage piston pin includes an axially penetrating pin body and nylon plugs installed at both ends of the pin body. The outer diameters of both ends of the pin body are provided with screw holes, and the outer diameters of the pin body are also provided with oil outlet holes, which are connected to the internal chambers of the pin body; wherein, the screw holes are not connected to the internal chambers of the pin body.

[0007] Preferably, the oil outlet is located on the outer diameter of the middle part of the pin body.

[0008] Preferably, at least three sets of oil outlet holes are provided on the same outer diameter of the pin body.

[0009] Preferably, the pin body is also provided with an oil seepage groove, which is arranged around the oil outlet hole.

[0010] Preferably, the depth of the oil seepage groove is 0.8-1.2 mm.

[0011] Preferably, the piston pin is provided with a sealing structure, which includes a first sealing groove, a second sealing groove and an O-ring seal; the first sealing groove is provided on the outer diameter of the nylon plug, the second sealing groove is provided on the inner diameter of the end of the pin and corresponds to the first sealing groove, and the O-ring seal is provided in the sealed space formed by the combination of the first sealing groove and the second sealing groove.

[0012] Preferably, the sealing structure has at least two sets.

[0013] Preferably, the nylon plug has a mounting hole at its end, which is located outside the pin.

[0014] Preferably, the nylon plug is made of PEEK material.

[0015] In summary, the advantages of this utility model are as follows:

[0016] By setting an oil outlet hole on the piston pin body, the original oil injection method of needle roller bearings is directly transformed into the current self-lubricated piston pin. This can avoid the problem of aging of needle roller bearing oil seals, make the piston swing more smoothly, increase working efficiency, and extend the service life of the piston pin. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the oil storage piston pin;

[0018] Figure 2 This is a partial structural diagram of the pin and nylon plug regarding the seal.

[0019] Reference numerals: 1. Pin; 2. Nylon plug; 3. Screw hole; 4. Oil outlet; 5. Oil seepage groove; 6. First sealing groove; 7. Second sealing groove; 8. O-ring seal; 9. Mounting hole. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0022] It should also be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0024] like Figures 1 to 2 As shown, an oil storage piston pin includes an axially penetrating pin body 1 (with an axially penetrating chamber inside) and nylon plugs 2 (made of PEEK material, which is resistant to high temperatures) installed at both ends of the pin body 1. An oil outlet hole 4 is also provided on the outer diameter of the pin body 1, and the oil outlet hole 4 is connected to the internal chamber of the pin body 1.

[0025] By adding an oil outlet 4, lubricating oil (such as DuPont GPL226 grease) is poured in and then plugged with a nylon plug 2. This nylon plug 2 keeps the internal pressure of the piston pin unchanged. When the piston pin and the needle roller bearing rotate at high speed, the temperature rises and the grease slowly overflows, achieving a lubricating effect. This avoids the problem of aging of the needle roller bearing oil seal, allows the piston to swing more smoothly, increases working efficiency, and extends the life of the piston pin.

[0026] Specifically, the oil outlet 4 is located on the outer diameter of the middle part of the pin body 1, which allows for more uniform oil lubrication when the piston pins are working together after installation. Furthermore, at least three sets of oil outlets 4 are provided on the same outer diameter of the pin body 1, and providing multiple sets of oil outlets 4 makes oil delivery more convenient.

[0027] An oil seepage groove 5 is also provided on the pin body 1. The oil seepage groove 5 is arranged around the oil outlet hole 4. The groove depth of the oil seepage groove 5 is 0.8-1.2mm. This structure design also makes the lubrication more uniform and comprehensive, and can also play a transition role.

[0028] like Figure 1 As shown, screw holes 3 are provided on the outer diameter of both ends of the pin body 1. The piston pin can be connected and fixed to the bearing through the screw holes 3. The screw holes 3 are not connected to the internal cavity of the pin body 1, so as to prevent lubricating oil from flowing out of the screw holes 3.

[0029] like Figures 1 to 2 As shown, since the piston pin body 1 is axially through, a sealing structure is provided on the piston pin to ensure the sealing performance after the nylon plug 2 is installed.

[0030] The specific sealing structure includes a first sealing groove 6, a second sealing groove 7, and an O-ring seal 8; the first sealing groove 6 is located on the outer diameter of the nylon plug 2, the second sealing groove 7 is located on the inner diameter of the end of the pin 1 and corresponds to the first sealing groove 6, and the O-ring seal 8 is located in the sealed space formed by the combination of the first sealing groove 6 and the second sealing groove 7.

[0031] To further ensure a good seal, the sealing structure is provided in at least two sets.

[0032] like Figure 1 As shown, since the pin 1 and the nylon plug 2 are small in size, they are not convenient to install by hand. In order to facilitate machine installation, an installation hole 9 is provided on the end of the nylon plug 2, and this end faces the outside of the pin 1 after installation.

[0033] The above description of embodiments of the present invention, through which those skilled in the art are able to implement or use the present invention, will be readily apparent to those skilled in the art. Various modifications to these embodiments will be readily apparent to those skilled in the art. The general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novelty disclosed herein.

Claims

1. An oil reservoir piston pin, characterized in that, The piston pin includes an axially penetrating pin body (1) and nylon plugs (2) installed at both ends of the pin body (1). The outer diameters of both ends of the pin body (1) are provided with screw holes (3), and the outer diameters of the pin body (1) are also provided with oil outlet holes (4). The oil outlet holes (4) are connected to the internal chambers of the pin body (1). The screw holes (3) are not connected to the internal chambers of the pin body (1).

2. The oil reservoir piston pin according to claim 1, characterized in that, The oil outlet (4) is located on the outer diameter of the middle part of the pin (1).

3. The oil reservoir piston pin according to claim 2, characterized in that, At least three sets of oil outlet holes (4) are provided on the same outer diameter of the pin body (1).

4. An oil reservoir piston pin according to claim 2 or 3, characterized in that, The pin (1) is also provided with an oil seepage groove (5), which is arranged around the oil outlet (4).

5. The oil reservoir piston pin according to claim 4, characterized in that, The depth of the oil seepage tank (5) is 0.8-1.2 mm.

6. The oil reservoir piston pin according to claim 1, characterized in that, The piston pin is provided with a sealing structure, which includes a first sealing groove (6), a second sealing groove (7) and an O-ring seal (8); the first sealing groove (6) is located on the outer diameter of the nylon plug (2), the second sealing groove (7) is located on the inner diameter of the end of the pin body (1) and corresponds to the first sealing groove (6), and the O-ring seal (8) is located in the sealed space formed by the combination of the first sealing groove (6) and the second sealing groove (7).

7. The oil reservoir piston pin according to claim 6, characterized in that, The sealing structure has at least two sets.

8. The oil reservoir piston pin according to claim 1, characterized in that, The nylon plug (2) has a mounting hole (9) at its end, which is located outside the pin (1).

9. The oil reservoir piston pin according to claim 1, characterized in that, The nylon plug (2) is made of PEEK material.

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