Novel gear box shaft end cover oil leakage prevention structure

Abstract

The invention discloses a novel gear box shaft end cover oil leakage prevention structure which comprises a box body, an output shaft and a bearing part, the bearing part comprises an outer ring and an inner ring, and the output shaft is fixedly connected with the inner ring through a lock nut. In the application, the expansion space generated by the concave oil baffle plate can prevent the situation that the lubricating oil is extruded to the rear of the oil baffle plate due to overlarge local oil pressure caused by untimely return of part of the lubricating oil to the box body, and the oil return groove is formed below the oil baffle plate to ensure that the blocked lubricating oil can smoothly return to the box body of the gear box, and meanwhile, the diameter of the oil slinger is increased; as the area of the oil slinger is increased, the oil slinging function of the oil slinger is also increased, when the output shaft rotates, the lubricating oil at the position can be better slinged to the end cover and the connecting position of the end cover and the oil return pipe, and the lubricating oil flows back to the gear box through the oil return pipe; therefore, lubricating oil is effectively prevented from leaking from the joint of the output shaft and the two end covers.

Description

Technical Field

[0001] The present invention relates to the technical field of gearbox accessories, and particularly to a novel anti-oil leakage structure for the shaft end cover of a gearbox. Background Art

[0002] A gearbox, also known as a transmission, plays a crucial role in a mechanical system. It is mainly used to change the input speed and torque to meet the requirements under different working conditions. Its working principle is mainly based on a series of meshing gears to achieve power transmission, speed adjustment, and direction conversion.

[0003] Chinese Patent Publication No. CN222415894U, published on January 28, 2025, discloses a gearbox oil collecting structure, including an oil guiding rib and a sleeve; the sleeve is sleeved on the idle shaft and fixed to the gearbox housing; an oil collecting groove is provided on the sleeve, and a second oil hole is opened in the oil collecting groove; the second oil hole is communicated with an oil passage opened in the idle shaft; the oil guiding rib is located on the inner wall of the box body above the oil collecting groove; lubricating oil is introduced into the oil collecting groove through the oil guiding rib.

[0004] For example, the existing oil slinger structure of the gearbox is relatively simple in form, and the radial sealing distance of the oil baffle is short. When a large amount of oil and gas fills the position of the high-speed shaft side cavity, this sealing structure cannot fully prevent the leakage of oil and gas. Due to the relatively high rotational speed at the high-speed shaft position of the gearbox, a large amount of oil mist will be generated during operation. The generated oil mist causes the pressure in the high-speed shaft side cavity to increase, resulting in varying degrees of oil leakage from the high-speed shaft end cover and the hollow shaft end cover positions during the operation of the unit. In some units, the leaked oil accumulates below the end cover, contaminating the slip ring and cables. Therefore, it is urgent to propose a corresponding anti-oil leakage structure for the gearbox shaft end cover to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to propose a novel anti-oil leakage structure for the shaft end cover of a gearbox in order to solve the above problems.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A novel anti-oil leakage structure for the shaft end cover of a gearbox, including a box body, an output shaft, and a bearing member. The bearing member includes an outer ring and an inner ring. The output shaft is fixedly connected to the inner ring through a lock nut. The outer ring is fixedly connected to the inner surface wall of the box body. An outer end cover is detachably connected to the outer surface wall of the box body. An oil baffle is fixedly connected between the outer end cover and the outer ring. An oil return groove is opened on the inner surface wall of the horizontal end of the oil baffle. An oil slinger fixedly connected to the output shaft is integrated between the oil baffle and the outer end cover, and the oil slinger is connected to the inner cavity of the box body through an oil return pipe for transmission.

[0008] Preferably, the middle of the oil baffle is concave to form an enlarged space.

[0009] Preferably, a gasket ring is integrally formed on the outer side of the oil baffle, and the gasket ring is pressed between the outer ring and the outer end cover.

[0010] Preferably, a convex rod is fixedly connected to the outer surface wall of the outer ring. The convex rod passes through the gasket ring through a perforation, and the outer surface wall of the convex rod is inserted into the inner part of the outer end cover through a slot.

[0011] Preferably, an installation ring is fixedly connected to the outer surface wall of the arc-shaped end of the outer end cover. A fastening rod passes through the installation ring through a shaped hole, and the fastening rod is screwed and connected to the inner surface wall of the box body through a screw hole.

[0012] Preferably, a sliding ring is fixedly connected to the outer surface wall of the outer end cover. The upper horizontal end of the return oil pipe passes through the sliding ring and the outer end cover. The lower horizontal end of the return oil pipe passes through the installation ring and the box body through a shaped hole and a screw hole respectively. And a check valve is integrated at one end of the return oil pipe close to the box body.

[0013] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present invention are as follows:

[0014] 1. In the present application, after the gasket ring is lapped on the outer side of the outer ring and the end cover and the box body are fixed by the fastening rod, the positions of the oil baffle and the gasket ring are fixed synchronously, the structure of the oil baffle is optimized, and the oil baffle is adjusted to the rear of the lock nut to prevent the bearing lubricating oil from crossing the oil baffle, thereby increasing the oil blocking efficiency of the oil baffle. The expansion space generated by the concave of the oil baffle can prevent part of the lubricating oil from causing excessive local oil pressure due to untimely return to the box body, and then squeeze the lubricating oil to the rear of the oil baffle. And an oil return groove is opened below the oil baffle to ensure that the blocked lubricating oil can smoothly return to the gearbox box body. At the same time, the diameter of the oil slinger is increased to prevent a small amount of lubricating oil that crosses the oil baffle from crossing the oil slinger. Because the area of the oil slinger increases, its oil slinging function also increases. When the output shaft rotates, it can better sling the lubricating oil at this position to the end cover and its connection position with the return oil pipe, and the lubricating oil flows back to the gearbox through the return oil pipe, thereby effectively preventing the lubricating oil from leaking from the connection between the output shaft and the two end covers.

[0015] 2. In the present application, the gasket ring and the outer ring are combined first through the cooperation of the perforation and the convex rod, and then the rapid positioning of the end cover is realized through the combination of the convex rod and the slot, so as to realize the precise alignment of the oil baffle and the end cover, ensure the correct positions of the oil return groove and the return oil pipe. At the same time, the convex rod gives axial limit to the gasket ring, thereby further ensuring the stability of the positions of the gasket ring and the oil baffle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Shows the overall structural schematic diagram provided by the embodiment of the present invention;

[0017] Figure 2Shows a schematic diagram of the expanded space structure provided according to an embodiment of the present invention;

[0018] Figure 3 Shows a schematic diagram of the oil return pipe structure provided according to an embodiment of the present invention;

[0019] Figure 4 Shows a schematic diagram of the end cover structure provided according to an embodiment of the present invention.

[0020] Legend Explanation:

[0021] 1. Outer end cover; 2. Box body; 3. Tightening rod; 4. Bearing part; 401. Outer ring; 402. Inner ring; 5. Output shaft; 6. Lock nut; 7. Oil baffle; 8. Convex rod; 9. Pad ring; 10. Oil slinger; 11. Slip ring; 12. Oil return pipe; 13. Check valve; 14. Expanded space; 15. Oil return groove; 16. Installation ring; 17. Slot. Detailed Embodiment

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0023] Please refer to Figures 1-4 , the present invention provides a technical solution:

[0024] A novel anti-oil leakage structure for the shaft end cover of a gearbox, including a box body 2, an output shaft 5 and a bearing part 4. The bearing part 4 includes an outer ring 401 and an inner ring 402. The output shaft 5 is fixedly connected to the inner ring 402 through a lock nut 6. The outer ring 401 is fixedly connected to the inner surface of the box body 2. The outer surface of the box body 2 is detachably connected with an outer end cover 1. A oil baffle 7 is fixedly connected between the outer end cover 1 and the outer ring 401. An oil return groove 15 is provided on the inner surface of the horizontal end of the oil baffle 7. An oil slinger 10 fixedly connected to the output shaft 5 is integrated between the oil baffle 7 and the outer end cover 1. And the oil slinger 10 is connected to the inner cavity of the box body 2 through an oil return pipe 12 for transmission connection;

[0025] Lap the spacer ring 9 outside the outer ring 401. After the outer end cover 1 and the box body 2 are fixed by the fastening rod 3, the positions of the oil baffle 7 and the spacer ring 9 are fixed synchronously, optimizing the structure of the oil baffle 7 and adjusting the oil baffle 7 behind the lock nut 6 to prevent the bearing lubricating oil from passing over the oil baffle 7, thereby increasing the oil blocking efficiency of the oil baffle 7. The expansion space 14 generated by the concave of the oil baffle 7 can prevent part of the lubricating oil from causing excessive local oil pressure due to the untimely return to the box body 2, and then squeeze the lubricating oil to the rear of the oil baffle 7. An oil return groove 15 is opened below the oil baffle 7 to ensure that the blocked lubricating oil can smoothly return to the gearbox box body 2. At the same time, the diameter of the oil slinger 10 is increased to prevent a small amount of lubricating oil passing over the oil baffle 7 from passing over the oil slinger 10. Due to the increase in the area of the oil slinger 10, its oil slinging function is also increased. When the output shaft 5 rotates, it can better sling the lubricating oil at this position to the outer end cover 1 and its connection position with the oil return pipe 12, and the lubricating oil flows back to the gearbox through the oil return pipe 12, effectively preventing the lubricating oil from leaking from the connection between the output shaft 5 and the two end covers.

[0026] Specifically, as Figure 2 shown in Figure 4 Figure, the middle part of the oil baffle 7 is concave to form an expansion space 14, which can prevent part of the lubricating oil from causing excessive local oil pressure due to the untimely return to the box body 2. A spacer ring 9 is integrally formed on the outer side of the oil baffle 7. The spacer ring 9 is pressed between the outer ring 401 and the outer end cover 1. A convex rod 8 is fixedly connected to the outer surface wall of the outer ring 401. The convex rod 8 passes through the spacer ring 9 through a perforation. The outer surface wall of the convex rod 8 is inserted into the inner part of the outer end cover 1 through a slot 17. First, the spacer ring 9 and the outer ring 401 are combined through the cooperation of the perforation and the convex rod 8, and then the rapid positioning of the outer end cover 1 is realized through the combination of the convex rod 8 and the slot 17, so as to realize the precise alignment of the oil baffle 7 and the outer end cover 1, ensure the correct positions of the oil return groove 15 and the oil return pipe 12. At the same time, the convex rod 8 gives axial limit to the spacer ring 9, further ensuring the stability of the positions of the spacer ring 9 and the oil baffle 7.

[0027] Specifically, as Figure 2 shown in Figure 3 Figure, an installation ring 16 is fixedly connected to the outer surface wall of the arc end of the outer end cover 1. A fastening rod 3 passes through the installation ring 16 through a shaped hole. The fastening rod 3 is screwed and connected to the inner surface wall of the box body 2 through a screw hole, so as to ensure the normal disassembly and assembly of the outer end cover 1. A sliding ring 11 is fixedly connected to the outer surface wall of the outer end cover 1. The upper horizontal end of the oil return pipe 12 passes through the sliding ring 11 and the outer end cover 1. The lower horizontal end of the oil return pipe 12 passes through the installation ring 16 and the box body 2 through a shaped hole and a screw hole respectively. And a one-way valve 13 is integrated at one end of the oil return pipe 12 close to the box body 2. The oil return pipe 12 is arranged based on the installation shaped holes of the sliding ring 11 and the installation ring 16, and is fixed by cooperating with fixed seals, so as to ensure the stable operation of the oil return pipe 12 without the need to open holes in the box body 2 and the outer end cover 1 again.

[0028] Working principle: After the gasket ring 9 is lapped on the outside of the outer ring 401 and the outer end cover 1 and the box body 2 are fixed by the fastening rod 3, the positions of the oil baffle 7 and the gasket ring 9 are fixed synchronously. The structure of the oil baffle 7 is optimized, and the oil baffle 7 is adjusted to the rear of the lock nut 6 to prevent the bearing lubricating oil from passing over the oil baffle 7, thereby increasing the oil blocking efficiency of the oil baffle 7. The expansion space 14 generated by the inner concave of the oil baffle 7 can prevent part of the lubricating oil from causing excessive local oil pressure due to the untimely return to the box body 2, and then squeeze the lubricating oil to the rear of the oil baffle 7. An oil return groove 15 is opened below the oil baffle 7 to ensure that the blocked lubricating oil can smoothly return to the gearbox box body 2. At the same time, the diameter of the oil slinger 10 is increased to prevent a small amount of lubricating oil that passes over the oil baffle 7 from passing over the oil slinger 10. Since the area of the oil slinger 10 increases, its oil slinging function also increases. When the output shaft 5 rotates, it can better sling the lubricating oil at this position to the outer end cover 1 and its connection position with the oil return pipe 12. The lubricating oil flows back to the gearbox through the oil return pipe 12, thereby effectively preventing the lubricating oil from leaking from the connection between the output shaft 5 and the two end covers. First, the gasket ring 9 is combined with the outer ring 401 through the cooperation of the through hole and the convex rod 8, and then the rapid positioning of the outer end cover 1 is realized through the combination of the convex rod 8 and the slot 17, so as to realize the precise alignment of the oil baffle 7 and the outer end cover 1, ensure the correct positions of the oil return groove 15 and the oil return pipe 12. At the same time, the convex rod 8 gives the axial limit of the gasket ring 9, thereby further ensuring the stability of the positions of the gasket ring 9 and the oil baffle 7.

[0029] The above description of the embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A novel anti-oil leakage structure for the shaft end cover of a gearbox, comprising a box body (2), an output shaft (5) and a bearing member (4), the bearing member (4) comprising an outer ring (401) and an inner ring (402), characterized in that, The output shaft (5) is fixedly connected to the inner ring (402) through a lock nut (6). The outer ring (401) is fixedly connected to the inner surface wall of the box body (2). The outer surface wall of the box body (2) is detachably connected with an outer end cover (1). A baffle plate (7) is fixedly connected between the outer end cover (1) and the outer ring (401). An oil return groove (15) is formed in the inner surface wall of the horizontal end of the baffle plate (7). An oil throwing ring (10) fixedly connected to the output shaft (5) is integrated between the baffle plate (7) and the outer end cover (1). The outer side of the oil throwing ring (10) is connected to the inner cavity of the box body (2) through an oil return pipe (12) for transmission connection.

2. The anti-oil leakage structure for the shaft end cover of a new type of gearbox according to claim 1, characterized in that The middle part of the baffle plate (7) is recessed to form an expansion space (14).

3. A novel anti-oil leakage structure for the shaft end cover of a gearbox according to claim 2, characterized in that, A gasket ring (9) is integrally formed on the outer side of the baffle plate (7). The gasket ring (9) is pressed between the outer ring (401) and the outer end cover (1).

4. A novel anti-oil leakage structure for the shaft end cover of a gearbox according to claim 3, characterized in that, A convex rod (8) is fixedly connected to the outer surface wall of the outer ring (401). The convex rod (8) passes through the gasket ring (9) through a perforation. The outer surface wall of the convex rod (8) is inserted into the inside of the outer end cover (1) through a slot (17).

5. A novel anti-oil leakage structure for the shaft end cover of a gearbox according to claim 4, characterized in that, An installation ring (16) is fixedly connected to the outer surface wall of the arc end of the outer end cover (1). A fastening rod (3) passes through the installation ring (16) through a shaped hole. The fastening rod (3) is screwed and connected to the inner surface wall of the box body (2) through a threaded hole.

6. A novel anti-oil leakage structure for the shaft end cover of a gearbox according to claim 5, characterized in that, A sliding ring (11) is fixedly connected to the outer surface wall of the outer end cover (1). The upper horizontal end of the oil return pipe (12) passes through the sliding ring (11) and the outer end cover (1). The lower horizontal end of the oil return pipe (12) passes through the installation ring (16) and the box body (2) respectively through a shaped hole and a threaded hole. A one-way valve (13) is integrated at one end of the oil return pipe (12) close to the box body (2).

Images