Cylindrical pin self-lubricating structure with PTFE coating

Abstract

The utility model provides a cylindrical pin self-lubricating structure with a PTFE (Polytetrafluoroethylene) coating, which belongs to the field of cylindrical pins and comprises a cylindrical pin shaft, a cavity is formed in the cylindrical pin shaft, and threads are arranged on the inner upper side of the cavity; the self-lubricating assembly comprises an inner sleeve which is in threaded connection with the interior of the cavity, lubricating parts are arranged on the upper side and the lower side outside the inner sleeve and the cylindrical pin shaft, and a plurality of lubricating holes are circularly formed in the lubricating parts. By means of the self-lubricating assembly, lubricating oil can be stored in the cylindrical pin in advance, and when disassembly is needed, if the cylindrical pin is difficult to take out and the interior of the cylindrical pin is clamped with an external component, the oil storage piece can be driven to move integrally by pressing the pressing block, so that the two oil storage cavities are aligned with the lubricating part; lubricating oil in the oil storage cavity is reserved through the formed lubricating hole, a gap between the cylindrical pin and an external component is lubricated, friction is reduced, and the dismounting success rate of the cylindrical pin is increased.

Description

Technical Field

[0001] This utility model relates to cylindrical pin technology, specifically a self-lubricating structure for a cylindrical pin with a PTFE coating. Background Technology

[0002] Pins are generally used to connect or lock parts, or for assembly positioning. They can also be used as parts in safety devices. Cylindrical pins are fixed in holes by interference fit, used to fix parts, transmit power, or as positioning elements.

[0003] Existing ordinary cylindrical pins are difficult to lubricate, making them easy to assemble but difficult to disassemble in practical applications. This is mainly because ordinary cylindrical pins lack lubricating oil protection, and over time, rust and deformation make disassembly difficult. Therefore, we propose a self-lubricating structure for cylindrical pins with a PTFE coating to solve the aforementioned problems. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this utility model provides a self-lubricating structure for a cylindrical pin with a PTFE coating to solve the problems mentioned in the background art.

[0005] The objective of this utility model can be achieved through the following technical solution: it includes a cylindrical pin, wherein a cavity is provided inside the cylindrical pin, and a thread is provided on the upper inner side of the cavity;

[0006] The self-lubricating assembly includes an inner sleeve threaded into a cavity. Lubrication portions are provided on both the upper and lower sides of the inner sleeve and the cylindrical pin. Each lubrication portion has a plurality of circular lubrication holes. A positioning ring is fixedly connected to the upper inner side of the inner sleeve. A spring is mounted on the positioning ring. A pressure block is also mounted on the positioning ring and above the spring. A connecting rod is fixedly connected below the pressure block. A guide sleeve is also mounted below the pressure block and outside the connecting rod. An oil reservoir is located below the positioning ring. Oil reservoirs have oil storage chambers on their upper and lower sides. The top plane of the oil reservoir abuts against the bottom of the positioning ring. Lower and upper guide holes are respectively provided on the left and right sides of the guide sleeve and the oil reservoir. An oil injection ring is rotatably connected to the pressure block. Symmetrical oil injection holes are provided on the oil injection ring.

[0007] Preferably, the outer perimeter of the pressure block is provided with protrusions, and the top perimeter of the inner sleeve is provided with guide grooves.

[0008] Preferably, a cross-shaped slot is provided at the top center of the oil injection ring, and the oil injection ring is damped and rotated on the top of the pressure block.

[0009] Preferably, both the lower guide hole and the upper guide hole have an arc-shaped portion at their ends, and the arc-shaped portion is connected to two adjacent oil storage chambers respectively.

[0010] Preferably, the oil storage cavity is formed by the oil storage member and the inner wall of the inner sleeve.

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

[0012] Through the self-lubricating assembly, the lubricating oil can be stored in the cylindrical pin in advance, when the cylindrical pin is difficult to be taken out and the internal and external components are stuck, the oil storage member can be moved as a whole by pressing the pressing block, the two oil storage cavities are aligned with the lubricating part, the lubricating oil in the oil storage cavity is discharged through the lubricating hole, the gap between the cylindrical pin and the external component is lubricated, the friction is reduced, and the disassembly success rate of the cylindrical pin is improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to facilitate the understanding of those skilled in the art, the utility model will be further described below in combination with the drawings.

[0014] Figure 1 is the three-dimensional structure schematic diagram of the utility model;

[0015] Figure 2 is the sectional structure schematic diagram of the utility model;

[0016] Figure 3 is Figure 2 the B part shown in the enlarged schematic view.

[0017] In the drawing: 1, cylindrical pin shaft; 2, inner sleeve; 3, lubricating part; 4, lubricating hole; 5, positioning ring; 6, spring; 7, pressing block; 8, connecting rod; 9, flow guide sleeve; 10, oil storage member; 11, oil storage cavity; 12, lower flow guide hole; 13, upper flow guide hole; 14, oil injection ring; 15, oil injection hole. DETAILED DESCRIPTION

[0018] The technical scheme of the utility model will be clearly and completely described below in combination with embodiments, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0019] Please refer to Figures 1-3 shown, a cylindrical pin has a self-lubricating structure with PTFE coating, including cylindrical pin shaft 1, the cavity is set in cylindrical pin shaft 1, the inner upper side of the cavity is provided with a thread, the thread can facilitate the installation of inner sleeve 2, PTFE coating is set on the outer cylindrical pin shaft 1, the coating has very low friction coefficient, can realize efficient lubrication under oil-free or low-oil conditions. This feature is particularly suitable for pin shaft components that need frequent movement or high-precision cooperation, such as automated equipment guide rails, precision instrument connecting pieces, etc., which can reduce mechanical jamming and prolong service life.

[0020] The self-lubricating assembly comprises an inner sleeve 2 threadedly connected in a cavity, the inner sleeve 2 and the cylindrical pin shaft 1 are both provided with lubricating portions 3 on the upper and lower sides, a plurality of lubricating holes 4 are circularly arranged in the lubricating portions 3, a positioning ring 5 is fixedly connected to the inner upper side of the inner sleeve 2, a spring 6 is arranged on the positioning ring 5, a pressing block 7 is further arranged on the positioning ring 5 and above the spring 6, a connecting rod 8 is fixedly connected below the pressing block 7, a flow guide sleeve 9 is further arranged below the connecting rod 8, an oil storage member 10 is arranged below the positioning ring 5, oil storage cavities 11 are respectively arranged on the upper and lower sides in the oil storage member 10, the top surface of the oil storage member 10 is in abutment with the bottom of the positioning ring 5, lower and upper flow guide holes 12 and 13 are respectively arranged on the left and right sides of the flow guide sleeve 9 and the oil storage member 10, and an oil injection ring 14 is further rotatably connected to the pressing block 7, oil injection holes 15 are symmetrically arranged on the oil injection ring 14.

[0021] It should be noted that the inner sleeve 2 is used for guiding and sealing the oil storage member 10, the lubricating portions 3 are used for distinguishing the machining surfaces, facilitating the machining of the lubricating holes 4, the positioning ring 5 is used for limiting and positioning the installation position of the spring 6, the pressing block 7 can facilitate the movement of the oil storage member 10 from the outside, the oil storage cavities 11 are used for storing lubricating oil in the cylindrical pin shaft 1, the upper and lower flow guide holes 12 and 13 are respectively used for injecting lubricating oil from the outside into the two oil storage cavities 11, and the oil injection ring 14 can be used for injecting lubricating oil from the outside when the oil injection holes 15 are aligned with the two flow guide holes through the rotation of the oil injection ring 14. Through the self-lubricating assembly, the lubricating oil can be stored in the cylindrical pin in advance. When disassembly is needed, if the cylindrical pin is difficult to remove and the internal and external components are stuck, the pressing block 7 can be pressed to drive the oil storage member 10 to move as a whole, so that the two oil storage cavities 11 are aligned with the lubricating portions 3. The lubricating holes 4 are arranged to allow the lubricating oil in the oil storage cavities 11 to flow out, so as to lubricate the gap between the cylindrical pin and the external components, thereby reducing friction and improving the disassembly success rate of the cylindrical pin.

[0022] In this embodiment, the outer side of the pressing block 7 is provided with protrusions, and the top end of the inner sleeve 2 is respectively provided with guide grooves. Through the cooperation of the protrusions and the guide grooves, the pressing block 7 can be guided to slide in the inner sleeve 2, facilitating the installation of the pressing block 7.

[0023] In this embodiment, a cross-shaped slot is arranged at the middle of the top of the oil injection ring 14, and the oil injection ring 14 is damped to rotate on the top of the pressing block 7. The cross-shaped slot can facilitate the rotation of the oil injection ring 14 by a screwdriver from the outside, and the oil injection ring 14 can be conveniently operated from the outside.

[0024] In this embodiment, the ends of the lower and upper flow guide holes 12 and 13 are respectively provided with arc-shaped portions, which are respectively connected to the adjacent two oil storage cavities 11. The arc-shaped portions can facilitate the entry of the lubricating oil into the oil storage cavities 11, so as to facilitate the oil injection operation of different oil storage cavities 11 from different flow guide holes.

[0025] In the embodiment, the oil storage cavities 11 are formed by the oil storage members 10 and the inner wall of the inner sleeve 2, the oil storage cavities 11 can temporarily store lubricating oil, and when the oil storage members 10 move downward, the lubricating oil is leaked outwards through the lubricating holes 4 on the lubricating parts 3 on the inner sleeve 2, so as to facilitate self-lubrication of the cylindrical pin shaft 1.

[0026] When the cylindrical pin shaft 1 needs to be disassembled and is difficult to disassemble, the oil storage member 10 is moved as a whole by pressing the pressing block 7 through the connecting rod 8 on the pressing block 7, so that the two oil storage cavities 11 are exposed in the lubricating parts 3 on the inner sleeve 2, the lubricating oil stored in the oil storage cavities 11 flows outwards from the adjacent lubricating holes 4, and the connection gap between the cylindrical pin shaft 1 and the external component is lubricated.

[0027] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details and limit the utility model to the specific implementation. Obviously, according to the content of the specification, many modifications and changes can be made. The specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the utility model, so that the technical personnel in the technical field can well understand and use the utility model. The utility model is limited by the claims and the whole scope and equivalents.

Claims

1. A cylindrical pin having a self-lubricating structure of a PTFE coating, characterized by, The utility model provides a self-lubricating assembly of cylindrical pin shaft Cylindrical pin shaft (1) is provided with cavity in, and the upper side in the cavity is provided with screw thread; Self-lubricating assembly includes inner sleeve (2) threaded in the cavity, and the upper and lower sides of the outer sleeve (2) and cylindrical pin shaft (1) are provided with lubricating part (3), a plurality of lubricating holes (4) are circularly arranged in the lubricating part (3), the upper side of the inner sleeve (2) is fixedly connected with the positioning ring (5), the spring (6) is arranged on the positioning ring (5), the pressing block (7) is further arranged on the positioning ring (5) and above the spring (6), the connecting rod (8) is fixedly connected below the pressing block (7), the flow guide sleeve (9) is further arranged below the pressing block (7) and outside the connecting rod (8), the oil storage part (10) is arranged below the positioning ring (5), the oil storage cavity (11) is arranged on the upper and lower sides of the oil storage part (10) respectively, the top plane of the oil storage part (10) is in abutment with the bottom of the positioning ring (5), the lower flow guide hole (12) and the upper flow guide hole (13) are arranged on the left and right sides of the flow guide sleeve (9) and the oil storage part (10) respectively, the oil injection ring (14) is further rotatably connected on the pressing block (7), the oil injection hole (15) is symmetrically arranged on the oil injection ring (14).

2. A self-lubricating structure of cylindrical pin having PTFE coating as claimed in claim 1 wherein, The outer side of the pressing block (7) is provided with a protrusion, and the top end of the inner sleeve (2) is provided with a guide groove.

3. A self-lubricating structure of cylindrical pin having PTFE coating as claimed in claim 2 wherein, The top of the oil injection ring (14) is provided with a cross-shaped slot, and the oil injection ring (14) is rotatably connected on the top of the pressing block (7).

4. A self-lubricating structure of cylindrical pin having PTFE coating as claimed in claim 3 wherein, The end of the lower flow guide hole (12) and the upper flow guide hole (13) is provided with an arc-shaped part, and the arc-shaped parts are respectively connected with the adjacent two oil storage cavities (11).

5. A self-lubricating structure of cylindrical pin having PTFE coating as claimed in claim 4 wherein, The oil storage cavity (11) is composed of the inner wall of the oil storage part (10) and the inner sleeve (2).

Images