Structure of automatic cooling and lubricating bearing of speed reducer
The automatic cooling and lubrication of the top bearing of the reducer is achieved through the oil collection cover and oil slinger structure, which solves the problem of difficult lubrication in vertical installation, reduces costs and improves efficiency, and is suitable for space-constrained occasions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO DONLY CO LTD
- Filing Date
- 2025-07-23
- Publication Date
- 2026-07-14
AI Technical Summary
The top bearing of a vertically mounted gearbox is difficult to lubricate, and existing technologies require additional lubrication devices, which are costly and space-constrained.
The design incorporates an oil collection hood and an oil slinger structure. By utilizing the high-speed shaft rotation to sling oil, the lubricating oil is thrown into the oil collection chamber and guided to the bearing, achieving automatic cooling and lubrication without the need for additional devices.
It reduces costs, has a compact structure, is suitable for installation space-constrained applications, improves lubrication and cooling efficiency, and extends bearing life.
Smart Images
Figure CN224497352U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of speed reducers, and in particular to a structure for an automatic cooling and lubrication bearing for a speed reducer. Background Technology
[0002] In the field of mechanical transmission, speed reducers are an important piece of equipment widely used in various industrial scenarios. Vertically mounted speed reducers face a significant challenge in practical applications: difficulty in lubricating the top bearing. Due to the special structure of vertical mounting, natural oil flow is difficult to reach the top bearing, resulting in insufficient lubrication and cooling.
[0003] To address this issue, existing technologies typically employ additional lubrication devices. For example, raising the oil level in a replenishment tank allows lubricating oil to reach the top bearing via a level difference; alternatively, external lubrication devices such as flange pumps or electric pumps are installed to force-lubricate the top bearing. However, these methods have significant drawbacks. The added lubrication devices not only increase the manufacturing cost of the reducer, raising the overall price and hindering market competitiveness, but also increase its size. In space-constrained applications, such as compact machinery, finding a suitable installation location is difficult, limiting the reducer's application range. Utility Model Content
[0004] In view of the above-mentioned problems of existing speed reducers, the present invention aims to provide a structure for automatically cooling and lubricating bearings in speed reducers.
[0005] The specific technical solution is as follows:
[0006] An automatic cooling and lubrication bearing structure for a speed reducer includes a housing with an oil reservoir for storing lubricating oil inside. The top of the housing has multiple bearing mounting holes, and a high-speed shaft is rotatably mounted on the side of the housing. The structure includes an oil collection cover and an oil slinger. The oil collection cover is installed on the top of the housing, forming an oil collection cavity with the housing. The top of the housing has an oil inlet communicating with the interior of the housing, extending upwards. Each bearing mounting hole communicates with the oil collection cavity. The oil slinger is located inside the housing, directly below the oil inlet. Both ends of the oil slinger have oil troughs, and the middle part of the oil slinger is fitted over the high-speed shaft. When one oil trough is inside the oil reservoir, the other oil trough detaches from the oil reservoir.
[0007] As a further improvement and optimization of this solution, the top inner wall of the oil collecting trough located directly above the oil inlet has an upward and outward protrusion of a guide groove, which has an inverted "V" shaped structure.
[0008] As a further improvement and optimization of this solution, the bottom sides of the guide groove are located on both sides of the oil inlet.
[0009] As a further improvement and optimization of this solution, the two ends of the oil slinger are respectively formed with inclined oil scooping parts, and the oil scooping groove is formed on the top inclined surface of each oil scooping part.
[0010] As a further improvement and optimization of this solution, the bearing mounting hole is provided in two parts, namely a first mounting hole and a second mounting hole. An end cap is detachably mounted on the top of the first mounting hole, and at least one notch is formed on the side of the end cap to connect the first mounting hole and the oil collecting cavity.
[0011] As a further improvement and optimization of this solution, a cavity communicating with the second mounting hole is formed inside the oil collection hood, and the side wall of the cavity has a communication port communicating with the oil collection cavity.
[0012] As a further improvement and optimization of this solution, the reducer also includes a drive shaft and an output shaft. The drive shaft is coaxially installed in the first mounting hole, and the output shaft is installed in the second mounting hole. Bearings are provided between the drive shaft and the first mounting hole, and between the output shaft and the second mounting hole.
[0013] As a further improvement and optimization of this solution, the high-speed shaft and the transmission shaft are connected by a first transmission component, and the transmission shaft and the output shaft are connected by a second transmission link.
[0014] As a further improvement and optimization of this solution, the first transmission component is a bevel gear set structure with a transmission ratio greater than one, and the second transmission component is a spur gear set structure or a helical gear set structure with a transmission ratio greater than one.
[0015] As a further improvement and optimization of this solution, the oil collection cover is bolted to the top of the housing.
[0016] The positive effects of the above technical solution compared with the existing technology are:
[0017] (1) In this utility model, by setting up an oil collection cover and an oil slinger, the oil slinger is used to scoop the lubricating oil in the oil storage tank to the oil collection cover when it rotates with the high-speed shaft. Then, the lubricating oil is guided to the bearing mounting hole through the oil collection cavity to provide lubrication for the top bearing. No additional lubrication device is required, which reduces the cost. The structure is compact and suitable for occasions with limited installation space.
[0018] (2) The inverted “V” shaped guide groove in this utility model can increase the receiving area of lubricating oil and facilitate the lubricating oil to be smoothly collected at the bottom of the oil collection chamber after cooling along the groove wall, thereby improving the collection and cooling efficiency of lubricating oil. Attached Figure Description
[0019] Figure 1 This is a structural schematic diagram of an automatic cooling and lubrication bearing for a speed reducer according to the present invention;
[0020] In the attached diagram: 1. Housing; 2. High-speed shaft; 3. Drive shaft; 4. Output shaft; 5. Oil collection cover; 6. End cover; 7. Bearing; 8. First transmission component; 9. Second transmission component; 10. Oil slinger; 11. Oil reservoir; 12. Bearing mounting hole; 51. Oil collection chamber; 52. Guide groove; 53. Oil inlet; 54. Notch; 55. Connecting port; 101. Oil sling; 102. Oil sling section. Detailed Implementation
[0021] 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.
[0022] 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.
[0023] 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.
[0024] Figure 1 This is a structural diagram of an automatic cooling and lubrication bearing for a speed reducer according to the present invention. Figure 1 The diagram illustrates the structure of an automatic cooling and lubrication bearing 7 for a speed reducer according to a preferred embodiment. The speed reducer includes a housing 1, with an oil reservoir 11 for storing lubricating oil formed inside the housing 1. The top of the housing 1 has multiple bearing mounting holes 12. A high-speed shaft 2 is rotatably mounted on the side of the housing 1. The structure includes an oil collection cover 5 and an oil slinger 10. The oil collection cover 5 is installed on the top of the housing 1 and forms an oil collection cavity 51 between it and the housing 1. The top of the housing 1 is provided with an oil inlet 53 that communicates with the interior of the housing 1. The oil inlet 53 extends upward. Each bearing mounting hole 12 communicates with the oil collection cavity 51. The oil slinger 10 is located inside the housing 1 and is located directly below the oil inlet 53. Both ends of the oil slinger 10 have oil troughs 101 formed, and the middle part of the oil slinger 10 is sleeved outside the high-speed shaft 2. When one oil trough 101 is located inside the oil reservoir 11, the other oil trough 101 is disengaged from the oil reservoir 11.
[0025] In this application, by setting up an oil collection cover 5 and an oil slinger 10, the oil slinger 10 is used to scoop the lubricating oil in the oil storage tank 11 to the oil collection cover 5 when it rotates with the high-speed shaft 2. Then, the lubricating oil is guided to the bearing mounting hole 12 through the oil collection chamber 51 to provide lubrication for the top bearing 7. No additional lubrication device is required, which reduces the cost. The structure is also compact and suitable for occasions with limited installation space.
[0026] Furthermore, as a preferred embodiment, the top inner wall of the oil collecting groove located directly above the oil inlet 53 has an upwardly protruding guide groove 52, which has an inverted "V" shape. The inverted "V" shaped guide groove 52 can increase the receiving area of the lubricating oil and facilitate the lubricating oil to smoothly collect at the bottom of the oil collecting cavity 51 after cooling down along the groove wall, thereby improving the collection and cooling efficiency of the lubricating oil.
[0027] Furthermore, in a preferred embodiment, the bottom sides of the guide groove 52 are located on both sides of the oil inlet 53. This ensures that the lubricating oil flowing down from the guide groove 52 can accurately enter the oil collecting chamber 51 through the oil inlet 53, avoiding oil spillage and improving the utilization rate of the lubricating oil.
[0028] Furthermore, as a preferred embodiment, the oil slinger 10 has inclined oil scooping portions 102 at both ends, and an oil trough 101 is formed on the top inclined surface of each oil scooping portion 102. The inclined oil scooping portions 102 enable the oil trough 101 to more effectively scoop up lubricating oil during the rotation of the oil slinger 10, and to better throw out the lubricating oil using centrifugal force during high-speed rotation, thereby improving the oil slinging efficiency.
[0029] Furthermore, in a preferred embodiment, the bearing mounting hole 12 is provided with two holes, namely a first mounting hole and a second mounting hole. An end cap 6 is detachably mounted on the top of the first mounting hole, and at least one notch 54 is formed on the side of the end cap 6, connecting the first mounting hole and the oil collecting cavity 51. The detachable end cap 6 facilitates the installation, maintenance, and repair of the bearing 7; the design of the notch 54 in the end cap 6 allows the lubricating oil in the oil collecting cavity 51 to flow smoothly into the bearing 7 in the first mounting hole, ensuring the lubrication effect of the bearing 7.
[0030] Furthermore, in a preferred embodiment, the oil collecting cover 5 has a cavity communicating with the second mounting hole, and the side wall of the cavity has a communication port 55 communicating with the oil collecting cavity 51. This allows the lubricating oil in the oil collecting cavity 51 to enter the cavity communicating with the second mounting hole through the communication port 55, and then flow into the bearing 7 in the second mounting hole.
[0031] Furthermore, in a preferred embodiment, the reducer further includes a drive shaft 3 and an output shaft 4. The drive shaft 3 is coaxially mounted in the first mounting hole, and the output shaft 4 is mounted in the second mounting hole. Bearings 7 are provided between the drive shaft 3 and the first mounting hole, and between the output shaft 4 and the second mounting hole. This application clarifies the mounting relationship between the shaft and the bearings 7 inside the reducer. Through the automatic cooling and lubrication structure of this invention, effective lubrication and cooling can be provided simultaneously for the bearings 7 on both the drive shaft 3 and the output shaft 4, ensuring the normal operation of the reducer and extending the service life of the bearings 7.
[0032] Furthermore, in a preferred embodiment, the high-speed shaft 2 and the transmission shaft 3 are connected by a first transmission member 8, and the transmission shaft 3 and the output shaft 4 are connected by a second transmission link.
[0033] Furthermore, as a preferred embodiment, the first transmission member 8 is a bevel gear set structure with a transmission ratio greater than one, and the second transmission member 9 is a spur gear set structure or a helical gear set structure with a transmission ratio greater than one.
[0034] Furthermore, as a preferred embodiment, the oil collection cover 5 is bolted to the top of the housing 1. Bolting makes the installation and removal of the oil collection cover 5 more convenient and quick, facilitating cleaning, maintenance, and replacement. Additionally, to ensure a tight seal between the oil collection cover 5 and the housing 1, a sealing ring can be installed at the connection point.
[0035] 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 structure for automatically cooling and lubricating bearings in a speed reducer, the speed reducer comprising a housing, an oil reservoir for storing lubricating oil formed within the housing, a plurality of bearing mounting holes on the top of the housing, and a high-speed shaft rotatably mounted on the side of the housing, characterized in that, The structure includes: An oil collection cover is installed on the top of the housing and forms an oil collection cavity between the cover and the housing. The top of the housing is provided with an oil inlet that communicates with the interior of the housing. The oil inlet extends upward and each bearing mounting hole communicates with the oil collection cavity. An oil slinger is disposed inside the housing and located directly below the oil inlet. Both ends of the oil slinger have oil troughs, and the middle part of the oil slinger is sleeved outside the high-speed shaft. When one of the oil troughs is located in the oil storage tank, the other oil trough is disengaged from the oil storage tank.
2. The structure of the automatic cooling and lubrication bearing of the reducer according to claim 1, characterized in that, The top inner wall of the oil collecting trough, located directly above the oil inlet, has an upward and outward protruding guide groove, which has an inverted "V" shaped structure.
3. The structure of the automatic cooling and lubrication bearing of the reducer according to claim 2, characterized in that, The bottom sides of the guide groove are located on both sides of the oil inlet.
4. The structure of the automatic cooling and lubrication bearing of the reducer according to claim 1, characterized in that, The oil slinger has inclined oil scoops at both ends, and an oil trough is formed on the top inclined surface of each oil scoop.
5. The structure of the automatic cooling and lubrication bearing of the reducer according to claim 1, characterized in that, The bearing mounting hole is provided in two parts, namely a first mounting hole and a second mounting hole. An end cap is detachably mounted on the top of the first mounting hole, and at least one notch is formed on the side of the end cap to connect the first mounting hole and the oil collecting cavity.
6. The structure of the automatic cooling and lubrication bearing of the reducer according to claim 5, characterized in that, The oil collecting hood has a cavity that communicates with the second mounting hole, and the side wall of the cavity has a communication port that communicates with the oil collecting cavity.
7. The structure of the automatic cooling and lubrication bearing of the reducer according to claim 6, characterized in that, The speed reducer further includes a drive shaft and an output shaft. The drive shaft is coaxially installed in the first mounting hole, and the output shaft is installed in the second mounting hole. Bearings are provided between the drive shaft and the first mounting hole, and between the output shaft and the second mounting hole.
8. The structure of the automatic cooling and lubrication bearing of the reducer according to claim 7, characterized in that, The high-speed shaft is connected to the transmission shaft via a first transmission component, and the transmission shaft is connected to the output shaft via a second transmission link.
9. The structure of the automatic cooling and lubrication bearing of the reducer according to claim 8, characterized in that, The first transmission component is a bevel gear set structure with a transmission ratio greater than one, and the second transmission component is a spur gear set structure or a helical gear set structure with a transmission ratio greater than one.
10. The structure of the automatic cooling and lubrication bearing of the reducer according to claim 1, characterized in that, The oil collection cover is bolted to the top of the housing.