Pin shaft structure convenient to lubricate

Abstract

The pin shaft structure convenient to lubricate comprises a pin shaft, an oil cavity is formed in the pin shaft, oil outlets distributed circumferentially are formed in the outer surface of the top end of the pin shaft, and uniform distribution grooves formed in the surface of the pin shaft are formed in the bottom ends of the oil outlets. A flow guide groove formed in the surface of the pin shaft is formed below the equipartition groove, the equipartition groove and the flow guide groove are communicated, a paraffin block is arranged at the bottom end of the oil cavity, a push plug is tightly attached to the top face of the paraffin block, and when the pin shaft works and emits heat, the paraffin block at the bottom of the oil cavity is heated to be melted, the volume of the paraffin block expands to push the push plug tightly attached to the top face to ascend, and the pin shaft is driven to rotate. Lubricating oil is extruded under the action of the push plug and flows out through the oil outlets, and the oil outlets distributed circumferentially can ensure that the lubricating oil uniformly flows out from all directions of the pin shaft to cover the contact area of the pin shaft and a connecting part, so that the lubricating uniformity is improved, and local abrasion is reduced.

Description

Technical Field

[0001] The utility model relates to the field of pin shafts, in particular to a pin shaft structure which is easy to lubricate. Background Art

[0002] A pin typically consists of a cylindrical shaft and a head. The shaft has a smooth surface to ensure free rotation at the connection point. The head generally comes in a variety of shapes, such as cylindrical, conical, flat, and domed, to prevent the pin from falling out of the connection hole and facilitate installation and removal.

[0003] During the use of the pin, a large friction force is generated when the pin and the contacting parts move against each other. In the existing technology, butter is generally applied on the surface of the pin, but the butter cannot be applied evenly, which affects the lubrication effect. In addition, it takes a long time to apply the butter, and the work efficiency is low.

[0004] Therefore, a pin structure which is convenient for lubrication is proposed. Utility Model Content

[0005] In view of the above problems, the present invention provides a pin structure that is easy to lubricate to solve the problems raised in the above background technology.

[0006] The technical solution of the utility model is:

[0007] A pin structure that is easy to lubricate includes a pin, an oil chamber is opened inside the pin, a circumferentially distributed oil outlet is opened on the outer surface of the top end of the pin, an equalizing groove opened on the surface of the pin is provided at the bottom end of the oil outlet, a guide groove opened on the surface of the pin is provided below the equalizing groove, and the equalizing groove and the guide groove are connected, a paraffin block is provided at the bottom end of the oil chamber, and a push plug is tightly fitted on the top surface of the paraffin block.

[0008] In a further technical solution, the push plug includes a push block, a scraping block, and a groove. The push block is located at the top end of the push plug, the scraping block is located at the bottom end of the push plug, the groove is located between the push block and the scraping block, and the edge of the scraping block is beveled.

[0009] Through the above technical solution, when the pin shaft is working and heating up, the paraffin block at the bottom of the oil chamber is heated to change from solid to liquid, and its volume expands. The liquid paraffin pushes the push plug upward, and the push block is pushed by the paraffin at the top, squeezing the lubricating oil in the oil chamber and causing it to flow toward the oil outlet. At the same time, as the push plug rises, the scraper block can scrape the inner wall of the oil chamber with its beveled edge to prevent the lubricating oil from adhering to the wall during the rising process, ensuring that the lubricating oil can fully flow to the oil outlet. When the temperature of the pin shaft drops, the paraffin block gradually cools and solidifies, and its volume shrinks. At this time, the push plug begins to move downward under the action of gravity and the pressure in the oil chamber, and the beveled edge of the scraper block comes into play again to scrape off the liquid adhering to the surface of the oil chamber.

[0010] In a further technical solution, an oil filling port is provided at the top end of the pin shaft, and a sealing plug is threadedly connected to the inner wall of the oil filling port.

[0011] The above technical solution facilitates oil filling and also facilitates the use of a tool to push the plug from under the oil filling port to push out the liquid paraffin in the oil cavity when cleaning the oil cavity.

[0012] In a further technical solution, a cleaning port is provided at the bottom end of the pin shaft, a sealing block is threadedly connected to the inner wall of the cleaning port, a rotation groove is provided on the surface of the sealing block, and the rotation groove is cross-shaped.

[0013] The above technical solution facilitates the discharge of liquid paraffin when it is pushed.

[0014] In a further technical solution, a symmetrical guide groove is provided on the inner wall of the oil chamber, a symmetrical slider is fixedly connected to the surface of the push block, the slider is slidably engaged with the guide groove, and the top of the guide groove is located below the oil outlet.

[0015] Through the above technical solution, the movement of the push block can have a limiting and guiding effect.

[0016] In a further technical solution, the oil outlet is in an inverted Y shape, and a symmetrical guide port is provided at the bottom end of each oil outlet. The guide port is connected to the equalizing groove, and a filter is fixedly installed on the inner wall of the oil outlet opening.

[0017] Through the above technical solution, when the pin shaft is working and generates heat, the paraffin block melts and expands, pushing the push plug up, and the lubricating oil in the oil chamber is squeezed to flow toward the top of the pin shaft. The lubricating oil first reaches the inverted Y-shaped oil outlet. Since a symmetrical guide port is provided at the bottom end of each oil outlet, the lubricating oil flows from the oil outlet through the guide port into the equalizing groove. The lubricating oil entering the equalizing groove is evenly distributed in all directions. Then, the lubricating oil further flows to the surface of the pin shaft through the guide groove, thereby achieving comprehensive lubrication of the pin shaft. The oil outlet is an inverted Y-shape, which allows the lubricating oil to flow out from multiple directions, increasing the area and range of the oil outlet. The symmetrical guide port is used to guide the lubricating oil into the equalizing groove, further ensuring that the lubricating oil can be evenly distributed to all parts of the pin shaft, avoiding the problem of insufficient local lubrication, improving the uniformity of lubrication, and reducing the risk of damage to the pin shaft due to local wear. Moreover, before the lubricating oil flows out of the oil outlet, the filter can filter out impurities in the lubricating oil.

[0018] In a further technical solution, a cavity is provided inside the push plug.

[0019] Through the above technical solution, the cavity opened inside the push plug can reduce the weight of the push plug, making it easier to move under the push of the paraffin block.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. When the pin is working and heating up, the paraffin block at the bottom of the oil chamber melts due to the heat, and its volume expands, pushing the push plug that fits tightly on the top surface upward. The lubricating oil is squeezed by the push plug and flows out through the oil outlet. The circumferentially distributed oil outlets can ensure that the lubricating oil flows out evenly from all directions of the pin, covering the contact area between the pin and the connecting parts, thereby improving the uniformity of lubrication and reducing local wear;

[0022] In addition, the setting of the equalizing groove and the guide groove further enhances the uniform distribution of the lubricating oil. The lubricating oil flowing out of the oil outlet first enters the equalizing groove, which distributes the lubricating oil evenly in all directions. Then, the lubricating oil flows to the surface of the pin through the guide groove, ensuring that the entire pin surface can be fully lubricated.

[0023] 2. This structure does not require an additional power source to achieve lubrication. It only relies on the heat generated by the pin's own operation to trigger the phase change of the paraffin block, thereby achieving automatic lubrication. It not only saves energy, but also reduces the noise and environmental pollution caused by the use of external lubrication equipment. It is suitable for various working environments and working conditions. Regardless of the speed of the pin or the size of the load, as long as the pin generates heat, the paraffin block can automatically adjust the lubrication state according to the temperature change. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0025] Figure 2 This is a schematic diagram of the partial cross-sectional structure of the pin of the utility model;

[0026] Figure 3 This is a schematic diagram of the bottom structure of the pin shaft of the utility model;

[0027] Figure 4 It is a partial cross-sectional structural diagram of the push plug of the utility model.

[0028] Description of reference numerals:

[0029] 1. Pin; 2. Oil chamber; 3. Oil outlet; 4. Equalizing groove; 5. Guide groove; 6. Paraffin block; 7. Push plug; 701. Push block; 702. Scraper block; 703. Groove; 8. Oil filling port; 9. Sealing plug; 10. Cleaning port; 11. Sealing block; 12. Rotating groove; 13. Guide port; 14. Filter screen; 15. Slider; 16. Guide groove; 17. Cavity. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0031] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc. should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0033] Example:

[0034] See also Figure 1-4A pin structure that is easy to lubricate includes a pin 1, an oil chamber 2 is opened inside the pin 1, and a circumferentially distributed oil outlet 3 is opened on the outer surface of the top end of the pin 1. The bottom end of the oil outlet 3 is provided with an equalizing groove 4 opened on the surface of the pin 1, and a guide groove 5 opened on the surface of the pin 1 is provided below the equalizing groove 4, and the equalizing groove 4 and the guide groove 5 are connected. A paraffin block 6 is provided at the bottom end of the oil chamber 2, and a push plug 7 is tightly fitted on the top surface of the paraffin block 6.

[0035] See also Figure 2 and Figure 4 The push plug 7 includes a push block 701, a scraping block 702, and a groove 703. The push block 701 is located at the top of the push plug 7, the scraping block 702 is located at the bottom of the push plug 7, the groove 703 is located between the push block 701 and the scraping block 702, and the edge of the scraping block 702 is beveled.

[0036] When the pin shaft 1 is working and heating up, the paraffin block 6 at the bottom of the oil chamber 2 is heated and changes from solid to liquid, and its volume expands. The liquid paraffin pushes the push plug 7 to move upward, and the push block 701 is pushed by the paraffin at the top, squeezing the lubricating oil in the oil chamber 2 and causing it to flow toward the oil outlet 3. At the same time, as the push plug 7 rises, the scraper block 702 can scrape the inner wall of the oil chamber 2 with its beveled edge to prevent the lubricating oil from adhering to the wall during the rising process, ensuring that the lubricating oil can fully flow to the oil outlet 3. When the temperature of the pin shaft 1 drops, the paraffin block 6 gradually cools and solidifies, and its volume shrinks. At this time, the push plug 7 begins to move downward under the action of gravity and the pressure in the oil chamber 2, and the beveled edge of the scraper block 702 plays a role again to scrape off the liquid adhering to the surface of the oil chamber 2.

[0037] See also Figure 1 and Figure 2 The top of the pin 1 is provided with an oil filling port 8, and the inner wall of the oil filling port 8 is threadedly connected with a sealing plug 9.

[0038] It is convenient for filling oil, and it is also convenient for cleaning the oil chamber 2 by using a tool to push the push plug 7 from the oil filling port 8 to push out the liquid paraffin in the oil chamber 2.

[0039] See also Figure 1 and Figure 3 The bottom end of the pin shaft 1 is provided with a cleaning port 10, the inner wall of the cleaning port 10 is threadedly connected with a sealing block 11, and the surface of the sealing block 11 is provided with a rotation groove 12, and the rotation groove 12 is cross-shaped.

[0040] It is convenient to discharge the liquid paraffin when pushing it.

[0041] See also Figure 1 and Figure 3A symmetrical guide groove 16 is provided on the inner wall of the oil chamber 2, and a symmetrical slider 15 is fixedly connected to the surface of the push block 701. The slider 15 slides in cooperation with the guide groove 16, and the top of the guide groove 16 is located below the oil outlet 3.

[0042] The movement of the push block 701 can have a limiting and guiding effect.

[0043] See also Figure 1 and Figure 2 The oil outlet 3 is an inverted Y-shape, and a symmetrical guide port 13 is provided at the bottom end of each oil outlet 3. The guide port 13 is connected to the equalizing groove 4, and a filter screen 14 is fixedly installed on the inner wall of the opening of the oil outlet 3.

[0044] When the pin shaft is working and generates heat, the paraffin block melts and expands, pushing the push plug up, and the lubricating oil in the oil chamber is squeezed to flow toward the top of the pin shaft. The lubricating oil first reaches the inverted Y-shaped oil outlet 3. Since a symmetrical guide port 13 is provided at the bottom end of each oil outlet 3, the lubricating oil flows from the oil outlet 3 through the guide port 13 into the equalizing groove 4. The lubricating oil entering the equalizing groove 4 is evenly distributed in all directions. Then, the lubricating oil further flows to the surface of the pin shaft through the guide groove 5, achieving comprehensive lubrication of the pin shaft. The oil outlet 3 is an inverted Y-shape, which allows the lubricating oil to flow out from multiple directions, increasing the area and range of the oil outlet. The symmetrical guide port 13 is used to guide the lubricating oil into the equalizing groove 4, further ensuring that the lubricating oil can be evenly distributed to various parts of the pin shaft, avoiding the problem of local insufficient lubrication, improving the uniformity of lubrication, and reducing the risk of damage to the pin shaft due to local wear. Moreover, before the lubricating oil flows out of the oil outlet 3, the filter 14 can filter out impurities in the lubricating oil.

[0045] See also Figure 2 and Figure 4 A cavity 17 is provided inside the push plug 7 .

[0046] The cavity 17 formed inside the push plug 7 can reduce the weight of the push plug 7 , making it easier to move when pushed by the paraffin block 6 .

[0047] Working ready state: when the pin 1 is not working, the paraffin block 6 is in a solid state, and the push plug 7 is located at the bottom of the oil chamber 2;

[0048] When the pin shaft 1 starts to work, heat is generated due to friction and other reasons. As the temperature rises, the paraffin block 6 at the bottom of the oil chamber 2 is heated and gradually changes from solid to liquid, and its volume expands. The liquid paraffin pushes the push plug 7, which is in close contact with its top surface, to move upward. As the push plug 7 rises, the push block 701 first squeezes the lubricating oil in the oil chamber 2, and the scraping block 702 has an inclined edge, which can better scrape the inner wall of the oil chamber 2 during the rising process, ensuring that the lubricating oil is fully pushed. The lubricating oil squeezed by the push plug 7 is pushed out under the action of pressure. The lubricating oil flows from the top of the pin 1. When the lubricating oil reaches the oil outlet 3, since the oil outlet 3 is an inverted Y-shape and a symmetrical guide port 13 is opened at its bottom, the lubricating oil flows into the equalizing groove 4 through the guide port 13. The equalizing groove 4 evenly distributes the lubricating oil in all directions. Then, the lubricating oil further flows to the surface of the pin 1 through the guide groove 5, thereby achieving comprehensive lubrication of the pin 1. During this process, the filter 14 fixedly installed on the inner wall of the opening of the oil outlet 3 can filter out impurities in the lubricating oil to prevent the impurities from adversely affecting the lubrication of the pin 1.

[0049] When the lubricating oil in the oil chamber 2 is insufficient, it can be replenished through the oil filling port 8 at the top of the pin shaft 1, open the sealing plug 9 threadedly connected to the inner wall of the oil filling port 8, inject the lubricating oil into the oil chamber 2, and then tighten the sealing plug 9 to ensure the sealing of the oil chamber 2. After long-term use, the oil chamber 2 can be cleaned through the cleaning port 10 at the bottom end of the pin shaft 1, and a tool can be used to insert the cross-shaped rotating groove 12 on the surface of the sealing block 11, unscrew the sealing block 11, open the cleaning port 10, and clean the inside of the oil chamber 2. In addition, a tool can be used to push the push plug 7 downward from the oil filling port 8, and the scraper block 702 can be used to scrape and clean the wall of the oil chamber 2.

[0050] The above-described embodiments merely represent specific implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the scope of the present invention, all of which fall within the scope of protection of the present invention.

Claims

1. A pin structure that facilitates lubrication, comprising a pin (1), characterized in that: An oil cavity (2) is provided inside the pin shaft (1), and a circumferentially distributed oil outlet (3) is provided on the outer surface of the top end of the pin shaft (1). The bottom end of the oil outlet (3) is provided with an equalizing groove (4) provided on the surface of the pin shaft (1), and a guide groove (5) provided on the surface of the pin shaft (1) is provided below the equalizing groove (4). The equalizing groove (4) and the guide groove (5) are communicated with each other. A paraffin block (6) is provided at the bottom end of the oil cavity (2), and a push plug (7) is tightly fitted on the top surface of the paraffin block (6).

2. A pin structure that facilitates lubrication according to claim 1, characterized in that: The push plug (7) comprises a push block (701), a scraping block (702), and a groove (703); the push block (701) is located at the top end of the push plug (7); the scraping block (702) is located at the bottom end of the push plug (7); the groove (703) is located between the push block (701) and the scraping block (702); and the edge of the scraping block (702) is in the shape of a bevel.

3. The pin structure that facilitates lubrication according to claim 1, characterized in that: An oil filling port (8) is provided at the top end of the pin shaft (1), and a sealing plug (9) is threadedly connected to the inner wall of the oil filling port (8).

4. The pin structure for facilitating lubrication according to claim 1, characterized in that: A cleaning port (10) is provided at the bottom end of the pin shaft (1), and a sealing block (11) is threadedly connected to the inner wall of the cleaning port (10). A rotation groove (12) is provided on the surface of the sealing block (11), and the rotation groove (12) is cross-shaped.

5. The pin structure for facilitating lubrication according to claim 2, characterized in that: A symmetrical guide groove (16) is provided on the inner wall of the oil chamber (2), and a symmetrical slider (15) is fixedly connected to the surface of the push block (701). The slider (15) is slidably engaged with the guide groove (16), and the top end of the guide groove (16) is located below the oil outlet (3).

6. The pin structure for facilitating lubrication according to claim 1, characterized in that: The oil outlet (3) is in an inverted Y shape, and a symmetrical guide opening (13) is provided at the bottom end of each oil outlet (3). The guide opening (13) is communicated with the equalizing groove (4), and a filter screen (14) is fixedly installed on the inner wall of the opening of the oil outlet (3).

7. The pin structure for facilitating lubrication according to claim 1, characterized in that: A cavity (17) is provided inside the push plug (7).

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