Gearbox and bearing lubricating oil circuit detection device thereof
By setting oil grooves and oil passages on the gearbox bearing housing, combined with transparent oil level indicators, the problem of the inability to quickly detect the unobstructedness of lubrication lines in gearboxes with built-in piping forced lubrication is solved. This enables visual detection of the lubrication oil passages, avoids bearing damage caused by blockages, and reduces equipment maintenance costs and production risks.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-16
- Publication Date
- 2026-04-03
AI Technical Summary
Existing built-in piping forced lubrication gearboxes cannot quickly determine the unobstructedness of bearing lubrication lines without shutting down the machine. This can lead to overheating, accelerated wear, or even damage to the bearings due to blockages, increasing equipment maintenance costs and posing production safety hazards.
A gearbox bearing lubrication circuit detection device was designed. By setting an oil groove, a first oil circuit, and a second oil circuit on the bearing housing, and equipping it with a transparent oil level indicator, the device enables visual detection of lubricating oil flow, allowing external observation of whether the lubricating oil is flowing smoothly and timely detection of faults.
It enables quick determination of whether the lubrication oil circuit is blocked without disassembling the gearbox, thus avoiding bearing damage, reducing the risk of equipment downtime, and without changing the original spatial layout and sealing performance of the gearbox.
Smart Images
Figure CN121782353A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of gearbox technology, and particularly relates to a gearbox and its bearing lubrication circuit detection device. Background Technology
[0002] In industrial production, construction machinery, and rail transportation, gearboxes, as core transmission components, directly determine the production efficiency and operational safety of the entire equipment. To reduce wear on key friction pairs such as gears and bearings and extend their service life, forced lubrication systems have become standard configurations for medium and large gearboxes. Among them, internally piped forced lubrication gearboxes, with their piping concealed inside the housing, offer advantages such as strong protection, compact space layout, and avoidance of external impact damage and oil contamination, making them widely used in scenarios requiring both structural safety and aesthetics. Compared to external piping, internal piping effectively reduces interference from the external environment on the lubrication lines, improves the overall sealing performance of the gearbox, and adapts to the long-term operational needs under complex conditions.
[0003] However, existing gearboxes with built-in piping forced lubrication have significant technical drawbacks: the bearing lubrication lines are entirely inside the gearbox, making it impossible to visually inspect their patency from the outside during operation. When the gearbox is working, lubricating oil must be precisely delivered to the bearing lubrication points through the built-in piping. If the piping becomes blocked due to impurities, oil aging, or congealing, the bearings will not receive effective lubrication, leading to overheating, accelerated wear, and in severe cases, bearing failure, causing gearbox shutdown. Such failures not only increase equipment maintenance costs and extend downtime but can also cause a chain reaction of problems, including production interruptions and operational safety hazards due to sudden shutdowns. Currently, there is a lack of a simple and reliable structure that can quickly assess the patency of the built-in bearing lubrication lines from the outside while the gearbox is running, making it difficult to avoid the risks of failures caused by undetected piping blockages. Therefore, there is an urgent need for a gearbox and its bearing lubrication circuit detection device. Summary of the Invention
[0004] To address some or all of the technical problems existing in the prior art, the present invention provides a gearbox and its bearing lubrication circuit detection device.
[0005] In one aspect of the present invention, a bearing lubrication circuit detection device for a gearbox is provided, comprising a bearing housing, a bearing hole formed in the bearing housing, and a bearing embedded in the bearing hole, characterized in that: An oil groove is provided circumferentially on the inner wall of the bearing hole, and the oil groove is disposed between the bearing and the inner wall of the bearing hole; The upper part of the bearing housing is provided with a first oil passage, and a first threaded interface is provided at one end of the bearing housing. The first oil passage is connected between the first threaded interface and the oil groove. An oil level indicator is internally threaded into the first threaded interface. The lower part of the bearing housing is provided with a second oil passage, and the other end of the bearing housing is provided with a second threaded interface. The second oil passage is connected between the second threaded interface and the oil groove. The second threaded interface is connected to a lubrication pipe. The first oil passage and the second oil passage are connected through the oil groove.
[0006] Furthermore, in the above-mentioned gearbox bearing lubrication circuit detection device, the first oil circuit includes a first oil pipe parallel to the bearing axis and connected to the threaded interface, and a second oil pipe perpendicular to the bearing axis and connected to the top of the oil groove, wherein the first oil pipe and the second oil pipe are vertically connected.
[0007] Furthermore, in the above-mentioned gearbox bearing lubrication circuit detection device, the second oil circuit includes a third oil pipe perpendicular to the bearing axis and connected to the bottom of the oil groove, and a fourth oil pipe parallel to the bearing axis and connected to the second threaded interface, wherein the third oil pipe and the fourth oil pipe are vertically connected.
[0008] In another aspect of the invention, a gearbox is also provided, the gearbox including the above-described lubrication circuit detection device.
[0009] The gearbox and its bearing lubrication circuit detection device of the present invention have the following advantages and positive effects: This device features a simple structure and is easy to assemble and disassemble. Through the connection design of the oil level indicator with the first oil circuit, oil sump, and second oil circuit, it allows for direct observation from the outside to determine whether the lubricating oil is flowing normally through the entire oil circuit without stopping the machine or disassembling the gearbox. This enables quick identification of any blockages in the pipeline, timely detection of potential faults, and prevention of bearing damage due to insufficient oil. Furthermore, the device is integrated into the bearing housing, eliminating the need for significant modifications to the gearbox housing and preserving the original spatial layout and sealing performance of the gearbox. It is compatible with various types of internally piped forced lubrication gearboxes and has excellent practicality. Attached Figure Description
[0010] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for further understanding of the embodiments of the present invention and constitute a part of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings: Figure 1This is a schematic diagram of the bearing lubrication oil circuit detection device for the gearbox of the present invention; Figure 2 This is a schematic diagram of the structure of the bearing lubrication oil circuit detection device for the gearbox of the present invention.
[0011] Explanation of reference numerals in the attached figures: 1. Bearing housing; 2. Bearing bore; 3. Bearing; 4. Oil groove; 5. First oil passage; 51. First oil pipe; 52. Second oil pipe; 6. First threaded interface; 7. Oil level indicator; 8. Second oil passage; 81. Third oil pipe; 82. Fourth oil pipe; 9. Second threaded interface; 10. Lubrication pipe. Detailed Implementation
[0012] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.
[0013] This invention provides a gearbox and its bearing lubrication circuit detection device, such as... Figure 1 , Figure 2 As shown, the bearing lubrication circuit detection device includes a bearing housing 1, a bearing hole 2 opened on the bearing housing 1, and a bearing 3 embedded in the bearing hole 2. An oil groove 4 is opened circumferentially on the inner wall of the bearing hole 2. The oil groove 4 is located between the bearing 3 and the inner wall of the bearing hole 2. The oil groove 4 can make the lubricating oil circumferentially distributed along the outer periphery of the bearing 3, ensuring that the lubricating oil can evenly cover the mating surface between the bearing 3 and the inner wall of the bearing hole 2, and provide comprehensive and stable lubrication for the bearing 3. The bearing housing 1 is provided with a first oil passage 5 on the upper part. A first threaded interface 6 is provided at one end of the bearing housing 1. The first oil passage 5 is connected between the threaded interface and the oil groove 4. An oil level indicator 7 is connected to the threaded interface. The threaded connection between the threaded interface and the oil level indicator 7 not only ensures the sealing performance of the connection part and prevents lubricating oil leakage, but also facilitates the disassembly and maintenance of the oil level indicator 7. At the same time, the oil level indicator 7 is made of transparent material, which allows the flow and residue of the internal lubricating oil to be directly observed from the outside of the gearbox, realizing the visual detection of the smoothness of the oil passage. A second oil passage 8 is provided at the lower part of the bearing housing 1, and a second threaded interface 9 is provided at the other end of the bearing housing 1. The second oil passage 8 is connected between the second threaded interface 9 and the oil groove 4. The second threaded interface 9 is connected to the lubrication pipe 10. The first oil passage 5 and the second oil passage 8 are connected through the oil groove 4. The first oil passage 5 and the second oil passage 8 form a complete lubricating oil flow path through the oil groove 4, so that the lubricating oil can flow from the lubrication pipe 10 through the second oil passage 8, the oil groove 4, and the first oil passage 5 to the oil level indicator 7. While completing the lubrication of the bearing 3, the oil level indicator 7 provides feedback on whether the oil passage is unobstructed.
[0014] In one specific embodiment, in the gearbox bearing lubrication circuit detection device of the present invention, the first oil circuit 5 includes a first oil pipe 51 parallel to the axis of the bearing 3 and connected to the threaded interface, and a second oil pipe 52 perpendicular to the axis of the bearing 3 and connected to the top of the oil groove 4, wherein the first oil pipe 51 and the second oil pipe 52 are vertically connected.
[0015] In one specific embodiment, in the bearing lubrication circuit detection device of the gearbox of the present invention, the second oil circuit 8 includes a third oil pipe 81 that is perpendicular to the axis of the bearing 3 and connected to the bottom of the oil groove 4, and a fourth oil pipe 82 that is parallel to the axis of the bearing 3 and connected to the second threaded interface 9. The third oil pipe 81 and the fourth oil pipe 82 are vertically connected.
[0016] The working principle of the bearing lubrication circuit detection device for the gearbox of the present invention is as follows: In actual operation, the gearbox's forced lubrication system delivers lubricating oil to the second oil circuit 8 through the lubrication pipe 10. The lubricating oil first enters the fourth oil pipe 82, flows parallel to the axis of the bearing 3 along the fourth oil pipe 82 to the third oil pipe 81, and then flows perpendicular to the axis of the bearing 3 through the third oil pipe 81 into the bottom of the oil groove 4. Since the oil groove 4 is an annular structure, the lubricating oil diffuses circumferentially after entering the oil groove 4, gradually filling the entire oil groove 4. At the same time, the lubricating oil contacts the outer peripheral surface of the bearing 3, lubricating the rotating bearing 3, reducing the friction and wear between the bearing 3 and the inner wall of the bearing hole 2, and realizing the lubrication function. Under pressure and its own fluidity, the lubricating oil in the oil tank 4 flows from the top of the oil tank 4 into the second oil pipe 52, flows perpendicular to the axis of the bearing 3 along the second oil pipe 52 to the first oil pipe 51, and then flows parallel to the axis of the bearing 3 through the first oil pipe 51 to the oil level indicator 7. The operator can observe through the transparent oil level indicator 7 from the outside of the gearbox. If the lubricating oil can be seen flowing or remaining in the oil level indicator 7, it means that the entire lubrication circuit (including the lubrication pipe 10, the second oil circuit 8, the oil tank 4, and the first oil circuit 5) is unobstructed and the bearing 3 can obtain a stable supply of lubricating oil. If there is no lubricating oil flowing in the oil level indicator 7 and no residue, it means that there is a blockage in the oil circuit. The blockage may be in the lubrication pipe 10, the second oil circuit 8, the first oil circuit 5, or the oil tank 4. At this time, the machine can be stopped in time for inspection to avoid the bearing 3 from overheating, accelerated wear, or even damage and failure due to long-term lack of oil. When maintenance or replacement of the oil level indicator 7 is required, simply unscrew the oil level indicator 7 to complete the disassembly and assembly. The operation is convenient and will not affect the overall structure and sealing performance of the oil circuit during the disassembly and assembly process. After maintenance, screw the new oil level indicator 7 into the first threaded interface 6 to restore its use.
[0017] On the other hand, the present invention also provides a gearbox, the gearbox including the above-mentioned gearbox bearing lubrication oil circuit detection device.
[0018] In summary, compared with the prior art, the gearbox and its bearing lubrication circuit detection device of the present invention have the following advantages and positive effects: This device has a simple structure and is easy to assemble and disassemble. Through the connection design of oil level indicator 7 with first oil line 5, oil tank 4 and second oil line 8, it is possible to observe from the outside whether the lubricating oil can flow normally through the entire oil line without stopping the machine or disassembling the gearbox. This allows for quick judgment of whether there is a blockage in the pipeline, timely detection of potential faults, and prevention of damage to bearing 3 due to lack of oil. Moreover, the device is integrated on bearing housing 1, without the need for major modifications to the gearbox housing, and does not change the original spatial layout and sealing performance of the gearbox. It can be adapted to various types of built-in piping forced lubrication gearboxes and has good practicality.
[0019] It should be noted that, unless otherwise expressly specified and limited, the term "connection" or its synonyms should be interpreted broadly in this document. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. Furthermore, expressions such as "first" and "second" are merely used to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Meanwhile, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. In addition, the terms "front," "rear," "left," "right," "upper," and "lower" in this document refer to the placement states shown in the accompanying drawings.
[0020] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A bearing lubrication circuit detection device for a gearbox, comprising a bearing housing, a bearing hole formed in the bearing housing, and a bearing embedded in the bearing hole, characterized in that: An oil groove is provided circumferentially on the inner wall of the bearing hole, and the oil groove is disposed between the bearing and the inner wall of the bearing hole; The upper part of the bearing housing is provided with a first oil passage, and a first threaded interface is provided at one end of the bearing housing. The first oil passage is connected between the first threaded interface and the oil groove. An oil level indicator is internally threaded into the first threaded interface. The lower part of the bearing housing is provided with a second oil passage, and the other end of the bearing housing is provided with a second threaded interface. The second oil passage is connected between the second threaded interface and the oil groove. The second threaded interface is connected to a lubrication pipe. The first oil passage and the second oil passage are connected through the oil groove.
2. The gearbox bearing lubrication circuit detection device according to claim 1, characterized in that, The first oil circuit includes a first oil pipe parallel to the bearing axis and connected to the threaded interface, and a second oil pipe perpendicular to the bearing axis and connected to the top of the oil sump, wherein the first oil pipe and the second oil pipe are vertically connected.
3. The gearbox bearing lubrication circuit detection device according to claim 1, characterized in that, The second oil circuit includes a third oil pipe perpendicular to the bearing axis and connected to the bottom of the oil sump, and a fourth oil pipe parallel to the bearing axis and connected to the second threaded interface, wherein the third oil pipe and the fourth oil pipe are vertically connected.
4. A gearbox, characterized in that, The gearbox includes the bearing lubrication circuit detection device according to any one of claims 1-3.