Combined sealing structure for horizontal and vertical installation of gearbox output shaft
By employing a combined sealing structure of oil seal, through cover, oil collection cover and oil slinger on the gearbox output shaft, the problem of poor sealing of the gearbox output shaft is solved, realizing automatic collection of lubricating oil and reducing operating costs.
Patent Information
- Application Number
- CN202520673288.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-10
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-04-10
AI Technical Summary
The existing gearbox output shaft has poor sealing performance, resulting in lubricating oil leakage that cannot be effectively recovered, increasing operating costs.
The combined sealing structure of oil seal, transparent cover, oil collection cover and oil slinger cup is adopted to achieve double-layer sealing between the output shaft and the housing. Through the design of oil slinger cup and oil collection cover, the leaked lubricating oil is automatically collected and recycled to the oil return device.
It improves the sealing effect, reduces the risk of lubricant leakage, and lowers the cost of use.
Smart Images
Figure CN223825560U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of output shaft sealing technology, and in particular to a combined sealing structure for horizontal and vertical installation of gearbox output shaft. Background Technology
[0002] Existing gearboxes generally include a housing, gear assembly, input shaft, and output shaft. One end of the output shaft extends into the gearbox, and the other end extends out of the gearbox. An oil seal assembly is installed between the output shaft and the gearbox to achieve sealing between the output shaft and the gearbox.
[0003] However, relying solely on oil seal components for sealing still results in lubricant leakage inside the enclosure, leading to poor sealing performance. Furthermore, the leaked lubricant cannot be effectively recovered, increasing operating costs. Utility Model Content
[0004] The purpose of this utility model is to provide a combined sealing structure for horizontal and vertical installation of the gearbox output shaft, in order to solve the above-mentioned technical problems.
[0005] The technical solution adopted in this utility model is as follows:
[0006] A combined sealing structure for horizontal and vertical mounting of a gearbox output shaft includes a housing and an output shaft, and further includes an oil seal, a through cover, an oil collection hood, and an oil slinger. The through cover is located on the outer edge of the output shaft, and two oil seals are disposed between the through cover and the output shaft. The oil collection hood is located at one end of the through cover, and an oil outlet is provided on the outer wall of the oil collection hood. The oil slinger is disposed inside the oil collection hood and is connected to the output shaft.
[0007] Preferably, the two oil seals are spaced apart, and the oil seals and the inner cavity of the housing form a first sealing cavity.
[0008] Preferably, a second sealed cavity is formed between the oil-slinging cup and the inner wall of the oil-collecting hood.
[0009] Preferably, the oil collection cover and the transparent cover are connected by a first bolt.
[0010] Preferably, the transparent cover is connected to the housing by a second bolt.
[0011] Preferably, the system also includes an oil return device connected to the oil outlet.
[0012] Preferably, the oil collection cover and the transparent cover are sealed together.
[0013] The above technical solution has the following advantages or beneficial effects:
[0014] In this invention, the design of an oil seal, a transparent cover, an oil collection hood, and an oil slinger cup enables a double-layer seal between the output shaft and the housing, ensuring a good sealing effect, effectively reducing the risk of lubricating oil leakage, and enabling automatic collection of lubricating oil, thus reducing operating costs. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the combined sealing structure in this utility model when the output shaft is installed vertically;
[0016] Figure 2 This is a schematic diagram of the combined sealing structure in this utility model when the output shaft is installed horizontally.
[0017] In the diagram: 1. Housing; 2. Output shaft; 3. Oil seal; 4. Through cover; 5. Oil collection cover; 6. Oil slinger cup; 7. First sealing chamber; 8. Second sealing chamber; 9. Oil return device; 10. First bolt; 11. Second bolt; 12. Third bolt. Detailed Implementation
[0018] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0019] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0021] Figure 1This is a schematic diagram of the combined sealing structure in this utility model when the output shaft is installed vertically; Figure 2 This is a schematic diagram of the combined sealing structure of this utility model when the output shaft is horizontally installed. Please refer to... Figures 1 to 2 The diagram illustrates a preferred embodiment of a combined sealing structure for a gearbox output shaft that is mounted horizontally and vertically. The structure includes a housing 1 and an output shaft 2, as well as an oil seal 3, a through cover 4, an oil collection hood 5, and an oil slinger 6. The through cover 4 is located on the outer edge of the output shaft 2, and two oil seals 3 are disposed between the through cover 4 and the output shaft 2. An oil collection hood 5 is located at one end of the through cover 4, and an oil outlet is provided on the outer wall of the oil collection hood 5. An oil slinger 6 is disposed inside the oil collection hood 5 and is connected to the output shaft 2. In this embodiment, see [reference needed]. Figure 1 As shown, the output shaft 2 penetrates the housing 1. A sealing ring can be installed between the cover 4 and the housing 1 to achieve a seal between the cover 4 and the housing 1. Two oil seals 3 are installed inside the cover 4, spaced apart. The oil seals 3 and the inner cavity of the housing 1 form a first sealing cavity 7, achieving a seal between the cover 4 and the output shaft 2, preventing lubricating oil leakage from the housing 1. However, in actual use, relying solely on the oil seals 3 for sealing still carries the risk of leakage. When the first sealing cavity 7 is damaged, lubricating oil will enter the oil slinger 6 and, under the centrifugal force of the oil slinger 6, will be sent into the second sealing cavity 8 between the oil slinger 6 and the inner wall of the oil collecting cover 5, where it will accumulate. The lubricating oil will then be discharged through the oil outlet, thus collecting the leaked lubricating oil and reducing operating costs. See also... Figure 1 or Figure 2 As shown, Figure 1 or Figure 2 The three second sealing chambers 8 shown are all interconnected, which allows the lubricating oil in the second sealing chambers 8 to enter the oil return device 9 through the oil outlet when the output shaft 2 is installed horizontally or vertically.
[0022] In this embodiment, the oil seal 3, oil collection cover 5, and oil slinger 6 provide a double-layer seal between the output shaft 2 and the housing 1, reducing the risk of lubricating oil leakage. Furthermore, this double-layer seal structure is adaptable to both horizontal and vertical installation of the output shaft 2.
[0023] Furthermore, as a preferred embodiment, the oil collecting cover 5 and the through cover 4 are connected by a first bolt 10. A sealing ring can be provided between the oil collecting cover 5 and the through cover 4 to achieve a sealed connection between them. There is a certain gap between the oil slinger cup 6 and the through cover 4. After the lubricating oil inside the housing 1 leaks, it will enter the oil slinger cup 6, and under the action of centrifugal force, the lubricating oil can be sent into the second sealed cavity 8 in the oil collecting cover 5. The lubricating oil can accumulate in the second sealed cavity 8 and enter the oil return device 9 under the action of the oil outlet.
[0024] Furthermore, as a preferred embodiment, the cover 4 is connected to the housing 1 by the second bolt 11. A sealing ring can be provided between the cover 4 and the housing 1 to achieve a sealing effect.
[0025] Furthermore, as a preferred embodiment, it also includes an oil return device 9, which is connected to the oil outlet. The oil return device 9 is an existing structure, serving as a container for collecting lubricating oil. The oil return device 9 and the oil outlet can be threaded together, facilitating the installation or removal of the oil return device 9.
[0026] See Figure 1 As shown, when the output shaft 2 is installed vertically, the rotation of the output shaft 2 can drive the oil slinger 6 to rotate. The oil slinger 6 is connected to the end face of the output shaft 2 by the third bolt 12 or screw. When the first sealing cavity 7 loses its sealing effect, the lubricating oil will fall onto the oil slinger 6 and enter the second sealing cavity 8 under the action of the centrifugal force of the oil slinger 6. Then, under the action of the oil outlet, it enters the oil return device 9.
[0027] When output shaft 2 is installed horizontally, see Figure 2 As shown, when the output shaft 2 rotates, lubricating oil enters the bottom of the first sealing chamber 7, and the amount of lubricating oil reaches the position of the oil seal 3, where the double oil seal 3 structure comes into play. If the first sealing chamber 7 fails for some reason, the lubricating oil flows into the second sealing chamber 8, and the lubricating oil in the oil collection cover 5 will smoothly return to the external oil return device 9 through the lower oil outlet.
[0028] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A combined sealing structure for horizontal and vertical mounting of a gearbox output shaft, comprising a housing and an output shaft, characterized in that, It also includes an oil seal, a through cover, an oil collection hood, and an oil slinger cup. The through cover is located on the outer edge of the output shaft. Two oil seals are provided between the through cover and the output shaft. The oil collection hood is provided at one end of the through cover. An oil outlet is provided on the outer wall of the oil collection hood. The oil slinger cup is provided inside the oil collection hood and is connected to the output shaft.
2. The combined sealing structure for horizontal and vertical mounting of the gearbox output shaft as described in claim 1, characterized in that, The two oil seals are spaced apart, and the oil seals and the inner cavity of the housing form a first sealed cavity.
3. The combined sealing structure for horizontal and vertical mounting of the gearbox output shaft as described in claim 1, characterized in that, A second sealed cavity is formed between the oil-slinging cup and the inner wall of the oil-collecting hood.
4. The combined sealing structure for horizontal and vertical mounting of the gearbox output shaft as described in claim 1, characterized in that, The oil collection cover and the transparent cover are connected by a first bolt.
5. The combined sealing structure for horizontal and vertical mounting of the gearbox output shaft as described in claim 1, characterized in that, The transparent cover is connected to the housing by a second bolt.
6. The combined sealing structure for horizontal and vertical mounting of the gearbox output shaft as described in claim 1, characterized in that, It also includes an oil return device, which is connected to the oil outlet.
7. The combined sealing structure for horizontal and vertical mounting of the gearbox output shaft as described in claim 1, characterized in that, The oil collection cover and the transparent cover are sealed together.