A lubricating structure of a slider-type universal shaft

Abstract

The utility model discloses a sliding block type universal shaft's lubricating structure, including sliding block type universal shaft body, the sliding block type universal shaft body is by the axle rod, two prongs, two flat head and two fixed pin shafts are composed. The utility model discloses through the injector that is equipped with lubricating oil liquid is inserted into the oil hole in the arc valve of annular sealing washer's penetration, makes lubricating oil liquid along the oil hole, transverse oil hole, arc channel and the oil overflow hole guide into the prong and the flat head between, replaces direct injection lubrication, makes lubricating oil liquid fully dispersed, improves the lubricating effect's while ensuring the normal rotation of prong and flat head, through the annular nesting of ring -shaped convex and prong between the axle rod both ends is connected, makes a plurality of arc convexes respectively insert a plurality of arc grooves, effectively positions to annular nesting, and makes the polytetrafluoroethylene material annular nesting cooperation annular sealing washer and arc valve provides the sealing to the oil hole, prevents the impurity from entering the oil hole and causes the blockage.

Description

Technical Field

[0001] This utility model relates to the field of slider universal joint technology, and in particular to a lubrication structure for slider universal joint. Background Technology

[0002] A slider-type universal joint is a mechanical device used to transmit torque and motion. Its structure consists of two shafts and a middle slider. The slider acts as a bearing to support and transmit torque, allowing the two shafts to rotate continuously even when there is an angle between their axes. It is widely used in applications requiring high torque transmission, such as steel rolling equipment.

[0003] In practical use, existing slider-type universal joints require lubricating oil to be injected between the flat head and the fork head for lubrication. However, the lubricating oil cannot be fully dispersed, resulting in poor lubrication and affecting the rotation between the flat head and the fork head. A lubrication structure for slider-type universal joints is proposed to solve the above problems. Utility Model Content

[0004] To address the shortcomings and defects in existing technologies, this utility model proposes a lubrication structure for a slider-type universal joint. This structure solves the technical problem in the prior art where, during actual use, existing slider-type universal joints require the injection of lubricating oil between the flat head and the fork head for lubrication. However, the lubricating oil cannot be fully dispersed, resulting in poor lubrication and affecting the rotation between the flat head and the fork head.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A lubrication structure for a slider-type universal joint includes a slider-type universal joint body, which is composed of a shaft, two forks, two flat heads, and two fixing pins. The two flat heads are inserted into the two forks and are connected and fixed by the fixing pins. The shaft has an annular protrusion on its annular sidewall near the two forks. An annular nest is sleeved on one end of the shaft at each of the two annular protrusions. The annular nest abuts and presses against the annular protrusion and the fork. The annular nest is movably engaged with the shaft. A lubrication mechanism is provided on the annular sidewall near the two forks of the shaft. The lubrication mechanism is connected to the arc-shaped inner wall of the fork.

[0006] Preferably, the inner wall of the annular nesting center is provided with a plurality of arc-shaped slots, which are arranged in a circumferential manner at equal intervals. The annular sidewall of the shaft facing the arc-shaped slots is provided with a plurality of arc-shaped protrusions, which are respectively inserted into the arc-shaped slots.

[0007] Preferably, all of the aforementioned arc-shaped protrusions are integrally formed with the shaft.

[0008] Preferably, the lubrication mechanism includes oil injection holes located on the inner annular sidewalls of two annular nests at both ends of the shaft, and transverse oil holes are provided between the left and right ends of the shaft and the two forks. The two transverse oil holes are respectively connected to the two oil injection holes. Two overflow holes are provided on the arc-shaped inner walls of the two forks, and an arc-shaped channel is provided between the two overflow holes and the transverse oil holes on the same side.

[0009] Preferably, an annular sealing ring is fixedly inserted into each of the two oil injection holes, and four cross-shaped arc-shaped valves are provided on the inner wall of each of the two annular sealing rings, with the four arc-shaped valves abutting and sealing each other.

[0010] Preferably, all four arc-shaped valves are integrally formed with the annular sealing ring, and the annular nest, the annular sealing ring, and the arc-shaped valves are all made of polytetrafluoroethylene.

[0011] Compared with the prior art, the advantages of this utility model are as follows: 1. By inserting a syringe filled with lubricating oil through the arc-shaped valve of the annular sealing ring into the oil injection hole, the lubricating oil is guided along the oil injection hole, the transverse oil hole, the arc-shaped channel and the overflow hole between the fork head and the flat head, instead of directly injecting lubricating oil. This allows the lubricating oil to be fully dispersed, improving the lubrication effect while ensuring the normal rotation of the fork head and the flat head.

[0012] 2. By fitting the annular nest between the annular protrusions at both ends of the shaft and the fork head, several arc-shaped protrusions are inserted into several arc-shaped slots, effectively positioning the annular nest. The PTFE annular nest, together with the annular sealing ring and the arc-shaped valve, provides a seal for the oil injection hole, preventing impurities from entering the oil injection hole and causing blockage. Attached Figure Description

[0013] Figure 1 This is a perspective view of the lubrication structure of a slider-type universal joint proposed in this utility model; Figure 2 for Figure 1 A magnified view of a section at point A in the middle; Figure 3 This is a schematic diagram of the annular nested structure of the lubrication structure of a slider-type universal joint proposed in this utility model; Figure 4 for Figure 1 A magnified view of a section at point B in the middle; Figure 5 This is a schematic diagram of the annular sealing ring of the lubrication structure of a slider-type universal joint proposed in this utility model.

[0014] In the diagram: 1 shaft, 2 fork head, 3 flat head, 4 fixed pin, 5 annular protrusion, 6 annular nest, 7 arc-shaped slot, 8 arc-shaped protrusion, 9 oil injection hole, 10 transverse oil hole, 11 overflow hole, 12 arc-shaped channel, 13 annular sealing ring, 14 arc-shaped valve. Detailed Implementation

[0015] In the description of this utility model, 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 utility model 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 utility model.

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] Reference Figure 1-5 A lubrication structure for a slider-type universal joint includes a slider-type universal joint body, which is composed of a shaft 1, two forks 2, two flat heads 3, and two fixing pins 4. The two flat heads 3 are inserted into the two forks 2 and connected and fixed by the fixing pins 4. The shaft 1 has an annular protrusion 5 on its annular sidewall near the two forks 2. An annular nest 6 is sleeved at one end of the shaft 1 on both sides of the annular protrusion 5. The annular nest 6 abuts and presses against the annular protrusion 5 and the forks 2. The annular nest 6 is movably engaged with the shaft 1. The annular inner wall at the center of the annular nest 6 has several arc-shaped slots 7, which are spaced apart. The shaft 1 is arranged in a ring with equal spacing. Several arc-shaped protrusions 8 are provided on the annular sidewalls of the shaft 1 facing the arc-shaped slots 7. The annular nest 6 is fitted between the annular protrusions 5 and the fork head 2 at both ends of the shaft 1, so that the arc-shaped protrusions 8 are inserted into the arc-shaped slots 7 respectively. This effectively positions the annular nest 6 between the annular protrusions 5 and the fork head 2, and the polytetrafluoroethylene annular nest 6, together with the annular sealing ring 13 and the arc-shaped valve 14, provides a seal for the oil injection hole 9, preventing impurities from entering the oil injection hole 9 and causing blockage. The arc-shaped protrusions 8 are inserted into the arc-shaped slots 7 respectively, and the arc-shaped protrusions 8 are all integrally formed with the shaft 1.

[0018] Lubrication mechanisms are provided on the annular sidewalls of the shaft 1 near the two fork heads 2. These lubrication mechanisms are connected to the arc-shaped inner walls of the fork heads 2. Each lubrication mechanism includes an oil injection hole 9 located on the annular sidewalls of the two annular nests 6 at both ends of the shaft 1. Transverse oil holes 10 are connected between the left and right ends of the shaft 1 and the two fork heads 2, respectively, and are connected to the two oil injection holes 9. Two overflow holes 11 are connected to the arc-shaped inner walls of the two fork heads 2. Arc-shaped channels 12 are connected between the two overflow holes 11 and the transverse oil holes 10 on the same side. A syringe filled with lubricating oil is inserted through the cross-shaped arc-shaped valves 14 within the annular sealing ring 13 until the syringe needle is inserted into the oil injection hole 9, allowing the lubricating oil to flow along the oil injection hole 9 and the transverse oil holes 10 into the two arc-shaped channels 12. The lubricating oil in the two arc-shaped channels 12 is introduced into the space between the fork head 2 and the flat head 3 through the two overflow holes 11, instead of directly injecting lubricant. This allows the lubricating oil to be fully dispersed, improving the lubrication effect while ensuring normal rotation between the fork head 2 and the flat head 3. Annular sealing rings 13 are fixedly inserted into each of the two oil injection holes 9. Four cross-shaped arc-shaped valves 14 are provided on the inner wall of each of the two annular sealing rings 13. The four arc-shaped valves 14 are in abutting and sealing contact with each other. The four arc-shaped valves 14 are integrally formed with the annular sealing rings 13. The annular sealing rings 13, together with the four cross-shaped arc-shaped valves 14, seal the oil injection holes 9 to prevent impurities from entering the oil injection holes 9. The annular nest 6, the annular sealing rings 13, and the arc-shaped valves 14 are all made of polytetrafluoroethylene.

[0019] In use, this invention involves inserting a syringe filled with lubricating oil through the cross-shaped arc-shaped valves 14 within the annular sealing ring 13 until the syringe needle is inserted into the oil injection hole 9. This allows the lubricating oil to flow along the oil injection hole 9 and the transverse oil hole 10 into the two arc-shaped channels 12. The lubricating oil in the two arc-shaped channels 12 then flows along the two overflow holes 11 between the fork head 2 and the flat head 3, replacing direct lubrication. This method fully disperses the lubricating oil, improving the lubrication effect while ensuring normal rotation between the fork head 2 and the flat head 3. The annular nest 6 is fitted between the annular protrusions 5 at both ends of the shaft 1 and the fork head 2. Several arc-shaped protrusions 8 are inserted into several arc-shaped slots 7, effectively positioning the annular nest 6 between the annular protrusions 5 and the fork head 2. The polytetrafluoroethylene annular nest 6, together with the annular sealing ring 13 and the arc-shaped valves 14, provides a seal for the oil injection hole 9, preventing impurities from entering the oil injection hole 9 and causing blockage.

[0020] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A lubrication structure for a slider-type universal joint, comprising a slider-type universal joint body, wherein the slider-type universal joint body is composed of a shaft (1), two forks (2), two flat heads (3), and two fixing pins (4), wherein the two flat heads (3) are inserted into the two forks (2) and connected and fixed by the fixing pins (4), and the shaft (1) has an annular protrusion (5) on its annular sidewall near the two forks (2), characterized in that, The shaft (1) is fitted with an annular nest (6) at one end of the annular protrusions (5) on both sides. The annular nest (6) abuts and presses against the annular protrusions (5) and the fork (2). The annular nest (6) is movably engaged with the shaft (1). The shaft (1) is provided with a lubrication mechanism on the annular sidewalls near the fork (2) on both sides. The lubrication mechanism is connected to the arc-shaped inner wall of the fork (2).

2. The lubrication structure for a slider-type universal joint according to claim 1, characterized in that, The inner wall of the annular nest (6) at the center position is provided with several arc-shaped slots (7), and the arc-shaped slots (7) are arranged in a ring with equal spacing. The annular sidewall of the shaft (1) facing the arc-shaped slots (7) is provided with several arc-shaped protrusions (8), and the arc-shaped protrusions (8) are respectively inserted into the arc-shaped slots (7).

3. The lubrication structure for a slider-type universal joint according to claim 2, characterized in that, Several of the arc-shaped protrusions (8) are integrally formed with the shaft (1).

4. The lubrication structure of a slider-type universal joint according to claim 1, characterized in that, The lubrication mechanism includes oil injection holes (9) located on the inner annular sidewalls of two annular nests (6) at both ends of the shaft (1). Transverse oil holes (10) are provided between the left and right ends of the shaft (1) and the two forks (2). The two transverse oil holes (10) are respectively connected to the two oil injection holes (9). Two overflow holes (11) are provided on the arc-shaped inner walls of the two forks (2). Arc-shaped channels (12) are provided between the two overflow holes (11) on the same side and the transverse oil holes (10).

5. The lubrication structure for a slider-type universal joint according to claim 4, characterized in that, An annular sealing ring (13) is fixedly inserted into each of the two oil injection holes (9). Four cross-shaped arc-shaped valves (14) are provided on the inner wall of each of the two annular sealing rings (13). The four arc-shaped valves (14) are in abutting and sealing contact with each other.

6. The lubrication structure for a slider-type universal joint according to claim 5, characterized in that, All four arc-shaped valves (14) are integrally formed with the annular sealing ring (13). The annular nest (6), the annular sealing ring (13) and the arc-shaped valves (14) are all made of polytetrafluoroethylene.

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