Novel universal shaft and cross shaft sealing structure
Through the full seal structure and multi-layer seal design, the early failure of universal shaft cross-pack bearings in harsh environments is solved, and the bearings are long life and low-cost maintenance are achieved.
Patent Information
- Application Number
- CN202422141504.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-02
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-09-02
AI Technical Summary
The existing universal shaft cross-pack bearings are susceptible to dust, water vapor, rust and oil pollution in harsh environments, resulting in early failure, insufficient sealing structure leads to external substances entering, shortening service life.
It adopts a fully sealed structure, including a combined bearing, thrust gasket, multi-lip oil seal and labyrinth seal, combined with high-temperature resistant fluoroelastomer and nylon plug, to form a multi-layer seal to prevent external substances from entering and ensure effective lubricating of lubricating grease.
It extends the service life of the bearing, reduces the frequency of shutdown and maintenance, reduces the cost of spare parts, and improves seal reliability.
Smart Images
Figure CN223062965U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of cross shaft sealing, in particular to a novel universal shaft cross shaft sealing structure. Background Art
[0002] The use environment of universal joints in the steel rolling industry is very harsh. Not only is the temperature high, but also dust, water vapor, rust, oil, etc. corrode the cross-bundle bearings, which greatly shortens the bearing life. Common failures include rust and breakage of the rollers inside the bearings, rust, pitting and gnawing of the cross shafts, etc. As shown in Figure 1, the cross shaft bearing seal currently used is a double-layer seal with oil seals on the cross shaft cone surface. When the thrust gasket is worn, the cross shaft moves axially. When the movement reaches a certain amount, the seal is separated from the cross shaft cone surface, resulting in a gap. Water and oil from the external environment take the opportunity to invade the bearing, causing abnormal wear and early failure of the bearing. Therefore, the universal joint cross shaft seal must be improved to effectively block external dust, water vapor, rust, oil, etc. from entering the cross shaft bearing in order to extend its service life. To this end, we propose a new universal joint cross shaft seal structure to solve the above problems. Utility Model Content
[0003] The purpose of the utility model is to provide a novel universal joint cross shaft sealing structure to solve the problem proposed in the above background technology of effectively blocking external dust, water vapor, rust, oil and the like from entering the cross bearing and extending its service life.
[0004] In order to achieve the above purpose, the utility model provides the following technical solutions: a new type of
[0005] A cross shaft sealing structure comprises a cross shaft, a combined bearing is arranged on the inner side of the shaft head of the cross shaft, a thrust gasket is arranged between the cross shaft and the combined bearing, an oil cup is installed on the outer side of the shaft head of the cross shaft, and a plug is connected to the inner end of the oil cup; the combined bearing comprises two cylindrical seals, one end face seal and three labyrinth seals, two cylindrical seals are arranged on the inner side of the thrust gasket, a multi-lip oil seal lip is arranged on the inner wall between the cross shaft and the thrust gasket, an end face seal is arranged at the multi-lip oil seal lip, and three labyrinth seals are arranged at the rear end of the end face seal.
[0006] Preferably, the oil seal at the lip of the multi-lip oil seal is made of high temperature resistant fluororubber.
[0007] Preferably, the plug is made of nylon to ensure that lubricating grease does not enter the cross shaft through hole.
[0008] Compared with the prior art, the beneficial effects of the utility model are:
[0009] The utility model has a fully sealed structure through a cross shaft and bearings. Lubricating grease is injected into the bearings by an oil gun through an M16X1.5 oil cup, then enters the cylindrical roller lubrication through a thrust washer, passes through the lips of a multi-lip oil seal, and overflows through a multi-layer labyrinth. At the same time, the multi-lip oil seal prevents external dust, oil stains, etc. from entering the bearings. The multi-layer sealing structure has reliable sealing, avoids premature failure of the cross shaft bearings, thus frequently replacing the cross package, extends the shutdown maintenance time, saves costs, reduces the reserve of spare parts due to the extended service life. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.
[0011] For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.
[0012] FIG. 1 is a traditional double-lip seal structure for a conical surface;
[0013] FIG. 2 is a schematic cross-sectional view of the structure of the present utility model;
[0014] FIG. 3 is the present utility model Figure 2 A partial enlarged schematic view of A in.
[0015] In the figure: 1, cross shaft; 2, thrust washer; 3, combined bearing; 31, second cylindrical seal; 32, first end face seal; 33, third labyrinth seal; 4, plug; 5, oil cup. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, 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 efforts belong to the protection scope of the present utility model.
[0017] Please refer to Figures 1-3. An embodiment of the utility model is: a new universal joint cross shaft sealing structure, including a cross shaft 1, a combined bearing 3 is provided on the inner side of the shaft head of the cross shaft 1, a thrust washer 2 is provided between the cross shaft 1 and the combined bearing 3, an oil cup 5 is installed on the outer side of the shaft head of the cross shaft 1, and a plug 4 is connected to the inner end of the oil cup 5; the combined bearing 3 includes two cylindrical seals 31, an end face seal 32 and three labyrinth seals 33, two cylindrical seals 31 are provided on the inner side of the thrust washer 2, a multi-lip oil seal lip is provided on the inner wall between the cross shaft 1 and the thrust washer 2, an end face seal 32 is provided at the multi-lip oil seal lip, and three labyrinth seals 33 are provided at the rear end of the end face seal 32. Figure 3 As shown, the structure is used to prevent external dust and oil from entering the bearing through two cylindrical seals 31, one end face seal 32 and three labyrinth seals 33, and the multi-layer sealing structure plays a sealing role.
[0018] The device solves the problem of effectively blocking external dust, water vapor, rust, oil and the like from entering the cross pack bearing and extending its service life by setting the combined bearing 3.
[0019] Furthermore, the oil seal at the lip of the multi-lip oil seal is made of high temperature resistant fluororubber. Figure 2 As shown, this structure is used to extend the service life of rubber by adopting fluororubber material.
[0020] Furthermore, the plug 4 is made of nylon to ensure that lubricating grease does not enter the cross shaft through hole. Figure 2 As shown, this structure is used to ensure that each bearing is individually oiled and fully lubricated through the plug 4. If the hole is not blocked or blocked loosely, the pressure along the way will be uneven, and there will be a lot of lubricating oil near the oiling side and insufficient oil on the opposite side.
[0021] Working principle: When in use, as shown in Figures 1 and 2, the lubricating grease is injected into the bearing through the M16X1.5 oil cup 5 with an oil gun, and then enters the second cylindrical seal 31 through the thrust gasket 2 to be lubricated by the cylindrical roller, and then passes through the lip of the multi-lip oil seal and an end face seal 32, and then overflows through the three labyrinth seals 33. At the same time, the multi-lip oil seal prevents external dust and oil from entering the bearing, and plays a sealing role. The above is the entire working principle of the utility model.
[0022] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.
Claims
1. A new cross shaft sealing structure for a universal shaft, comprising a cross shaft (1), characterized in that: A combined bearing (3) is provided inside the shaft head of the cross shaft (1). A thrust washer (2) is arranged between the cross shaft (1) and the combined bearing (3). An oil cup (5) is installed outside the shaft head of the cross shaft (1), and a plug (4) is connected to the inner end of the oil cup (5); The combined bearing (3) includes a two-way cylindrical seal (31), a one-way end face seal (32) and a three-way labyrinth seal (33). A two-way cylindrical seal (31) is arranged inside the thrust washer (2). The inner wall between the cross shaft (1) and the thrust washer (2) is provided with multi-lip oil seal lips. A one-way end face seal (32) is arranged at the multi-lip oil seal lips, and a three-way labyrinth seal (33) is arranged at the rear end of the one-way end face seal (32).
2. A novel cross shaft seal structure of a universal shaft according to claim 1, characterized in that: The oil seal at the multi-lip oil seal lips is made of high-temperature resistant fluororubber.
3. A novel cross shaft seal structure of a universal shaft according to claim 1, characterized in that: The plug (4) is made of nylon material to ensure that lubricating grease does not enter the through hole of the cross shaft.