Grease leakage-proof device for cross-shaped universal shaft head and spline coupling

Abstract

The utility model discloses a grease leakage-proof device for a cross-shaped universal shaft head and a spline coupling, which belongs to the technical field of cross-shaped universal shafts and comprises a first sealing structure, a second sealing structure and a third sealing structure. The first sealing structure comprises a sealing cover which is connected to the outer side of the flat hole of the cross-shaped cardan shaft in a sleeving mode, one end of the sealing cover is connected with the end face of the gland at the flat hole, and the other end of the sealing cover is fixed to the outer side of the flat hole of the cross-shaped cardan shaft through a hoop. The second sealing structure comprises a protective cover which is sleeved outside the spline pair, one end of the protective cover is connected with the end face of the gland outside the spline pair, and the other end of the protective cover is connected with the spline shaft through a first sealing ring. The third sealing structure comprises a second sealing ring, and the second sealing ring is arranged on the edge of an inner hole of the crowned tooth coupling gland. The utility model solves the problem that the gland at the flat hole of the cross-shaped universal shaft, the spline pair and the gland of the crowned tooth coupling are easy to leak oil.

Description

Technical Field

[0001] This utility model relates to the field of universal joint technology, and in particular to a grease leak prevention device for universal joint shaft head and spline coupling. Background Technology

[0002] In bar and wire rod rolling mills, universal joints are key components of the mill's transmission system. The universal joint shaft end connected to the rolls has a flat bore, while the shaft end connected to the gearbox is a drum-tooth coupling. These are widely used due to their high transmission efficiency, large torque transmission, and smooth operation. However, during use, oil leakage is prone to occur at the flat bore of the universal joint's gland due to manufacturing and installation errors, component deformation, and wear. Simultaneously, wear of the toothed seal inside the copper slider gland can lead to oil leakage at the drum-tooth coupling gland and spline joint. Reduced grease in the universal joint exacerbates wear at the joints, potentially leading to failure over time. Accumulated leaked grease on the production floor increases the workload of workers and hinders the effective implementation and promotion of lean production line management. Utility Model Content

[0003] This utility model proposes a grease leak prevention device for the universal joint shaft head and spline coupling to solve the problem of oil leakage that easily occurs at the flat hole gland of the universal joint, the spline joint, and the gland of the drum gear coupling.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A grease leak prevention device for a universal joint shaft head and spline coupling includes a first sealing structure for sealing the gland at the flat hole, a second sealing structure for sealing the spline joint, and a third sealing structure for sealing the gland of the drum gear coupling.

[0006] The first sealing structure includes a sealing cover, which is sleeved on the outside of the flat hole of the universal joint. One end of the sealing cover is connected to the end face of the pressure cap at the flat hole, and the other end is fixed to the outside of the flat hole of the universal joint by a clamp.

[0007] The second sealing structure includes a protective cover, which is fitted onto the outside of the spline pair. One end of the protective cover is connected to the end face of the outer cover of the spline pair, and the other end is connected to the spline shaft through the first sealing ring.

[0008] The third sealing structure includes a second sealing ring, which is disposed at the edge of the inner hole of the drum-shaped gear coupling gland.

[0009] Furthermore, the sealing cover is connected to the end face of the pressure cap at the flat hole by a number of first bolts.

[0010] Furthermore, the protective cover is connected to the end face of the outer cover of the spline pair by several second bolts.

[0011] Furthermore, a first sealing groove is provided on the inner side of the protective cover at the end away from the outer pressure cap of the spline pair, and the first sealing ring is disposed in the first sealing groove.

[0012] Furthermore, the protective cover has a through hole for observation and ventilation at one end near the outer end of the spline pair, and a vent plug is threaded into the through hole.

[0013] Furthermore, a second sealing groove is provided at the edge of the inner hole of the drum-shaped gear coupling cover, and the second sealing ring is disposed in the second sealing groove.

[0014] Furthermore, both the first and second sealing rings are O-rings, made of silicone or rubber.

[0015] By adopting the above technical solution, this utility model has the following beneficial effects:

[0016] This invention features a first sealing structure for sealing the flat hole gland, a second sealing structure for sealing the spline joint, and a third sealing structure for sealing the drum gear coupling gland. By sealing the flat hole gland, spline joint, and drum gear coupling gland, oil leakage at these three locations can be effectively prevented. Compared to traditional high-speed bar pre-finishing rolling mill shafts, the grease leak prevention device proposed in this invention offers more reliable sealing, enhances equipment lubrication, effectively extends equipment lifespan, improves production line efficiency, reduces equipment maintenance and repair costs, enhances equipment reliability, and is easy to promote and apply. Attached Figure Description

[0017] Figure 1 This is an assembly diagram of the grease leak prevention device proposed in Embodiment 1 of this utility model;

[0018] Figure 2 This is an assembly diagram of the first sealing structure proposed in Embodiment 1 of this utility model;

[0019] Figure 3 This is an assembly diagram of the second and third sealing structures proposed in Embodiment 1 of this utility model;

[0020] The components in the attached drawings are labeled as follows: 1-first sealing structure, 101-sealing cover, 102-clamp, 2-second sealing structure, 201-protective cover, 202-first sealing ring, 203-through hole, 3-third sealing structure, 301-second sealing ring, 4-pressure cover at the flat hole, 5-spline pair, 501-spline shaft, 502-outer pressure cover of spline pair, 6-pressure cover of the drum-shaped gear coupling. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example 1

[0023] like Figure 1-3 As shown, a grease leak prevention device for a universal joint shaft head and spline coupling includes a first sealing structure 1 for sealing the pressure cover 4 at the flat hole, a second sealing structure 2 for sealing the spline pair 5, and a third sealing structure 3 for sealing the pressure cover 6 of the drum gear coupling.

[0024] The first sealing structure 1 includes a sealing cover 101, which is fitted onto the outside of the flat hole of the universal joint. One end of the sealing cover 101 is connected to the end face of the pressure cap 4 at the flat hole, and the other end is fixed to the outside of the flat hole of the universal joint by a clamp 102 to prevent the sealing cover 101 from axially shifting and falling off during the rotation of the universal joint. Specifically, the sealing cover 101 is connected to the end face of the pressure cap 4 at the flat hole by several first bolts. The sealing cover 101 is made of fluororubber.

[0025] The second sealing structure 2 includes a protective cover 201 made of 45 steel. The protective cover 201 is fitted onto the outside of the splined pair 5, with one end connected to the end face of the outer cover 502 of the splined pair, and the other end connected to the splined shaft 501 via a first sealing ring 202. Specifically, the protective cover 201 is connected to the end face of the outer cover 502 of the splined pair by several second bolts. A first sealing groove is formed on the inner side of the protective cover 201 away from the outer cover 502 of the splined pair, and the first sealing ring 202 is disposed within the first sealing groove. Furthermore, a through hole 203 for observation and ventilation is formed on the end of the protective cover 201 near the outer cover 502 of the splined pair. A vent plug is threaded into the through hole 203; the vent plug is existing technology. When observation is required, the vent plug can be unscrewed.

[0026] The third sealing structure 3 includes a second sealing ring 301, which is disposed at the edge of the inner hole of the drum-shaped gear coupling cover 6 to ensure a tight fit. A second sealing groove is formed at the edge of the inner hole of the drum-shaped gear coupling cover 6, and the second sealing ring 301 is disposed within the second sealing groove. Both the first sealing ring 202 and the second sealing ring 301 are O-rings made of silicone or rubber.

[0027] This invention features a first sealing structure 1 for sealing the flat hole gland 4, a second sealing structure 2 for sealing the spline joint 5, and a third sealing structure 3 for sealing the drum gear coupling gland 6. By sealing the flat hole gland 4, the spline joint 5, and the drum gear coupling gland 6, oil leakage at these three locations can be effectively prevented. This invention effectively extends equipment lifespan, improves production line efficiency, reduces equipment maintenance and repair costs, enhances equipment reliability, and is easy to promote and apply.

[0028] This utility model has been put into practical use. The aforementioned grease leak prevention device has been added to the universal joint of the pre-finishing mill of the bar line of the hot rolling mill. After the modification, the grease leak prevention effect is better, the equipment operation reliability is higher, and the equipment operation and process parameter requirements are met.

[0029] The above description is a detailed description of the preferred embodiments of the present utility model. However, the embodiments are not intended to limit the scope of the patent application of the present utility model. All equivalent changes or modifications made under the technical spirit of the present utility model should fall within the patent scope covered by the present utility model.

Claims

1. A grease leakage preventing device for a cross universal shaft head and a spline coupling, characterized by: The first sealing structure is used for sealing the cover at the flat hole, the second sealing structure is used for sealing the spline pair, and the third sealing structure is used for sealing the cover of the drum gear coupling; The first sealing structure comprises a sealing cover, which is sleeved outside the flat hole of the cross universal shaft, one end of the sealing cover is connected with the end face of the cover at the flat hole, and the other end of the sealing cover is fixed outside the flat hole of the cross universal shaft through a hoop; The second sealing structure comprises a protective cover, which is sleeved outside the spline pair, one end of the protective cover is connected with the end face of the cover outside the spline pair, and the other end of the protective cover is connected with the spline shaft through a first sealing ring; The third sealing structure comprises a second sealing ring, which is arranged at the inner hole edge of the cover of the drum gear coupling.

2. A grease leakage preventing device for a cross universal shaft head and a spline coupling according to claim 1, characterized in that: The sealing cover is connected with the end face of the cover at the flat hole through a plurality of first bolts.

3. A grease leakage preventing device for a cross universal shaft head and a spline coupling according to claim 1, characterized in that: The protective cover is connected with the end face of the cover outside the spline pair through a plurality of second bolts.

4. A grease leakage preventing device for a cross universal shaft head and a spline coupling according to claim 1, characterized in that: The protective cover is provided with a first sealing groove on the inner side of the end of the protective cover away from the cover outside the spline pair, and the first sealing ring is arranged in the first sealing groove.

5. A grease leakage preventing device for a cross universal shaft head and a spline coupling according to claim 1, characterized in that: The protective cover is provided with a through hole for observation and ventilation on the end of the protective cover close to the cover outside the spline pair, and a breathable plug is threadedly connected in the through hole.

6. A grease leakage preventing device for a cross universal shaft head and a spline coupling according to claim 1, characterized in that: The cover of the drum gear coupling is provided with a second sealing groove at the inner hole edge of the cover of the drum gear coupling, and the second sealing ring is arranged in the second sealing groove.

7. A grease leakage preventing device for a cross universal shaft head and a spline coupling according to claim 1, characterized in that: The first sealing ring and the second sealing ring are both O-shaped sealing rings, and the material is silica gel or rubber.

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