Oil seal structure for low-speed shaft of gearbox
By designing an oil slinger and an oil guide surface structure on the low-speed shaft of the gearbox, the problem of lubricating oil leakage is solved, the effective throwing out and reflux of the lubricating oil is achieved, and the sealing performance of the gearbox is improved.
Patent Information
- Application Number
- CN202422982171.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-04
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-12-04
AI Technical Summary
The existing gearbox low-speed shaft oil seal structure has the problem of lubricating oil leakage, which affects the performance of the gearbox.
A gearbox low-speed shaft oil seal structure was designed, including a low-speed shaft oil seal, an oil slinger and a chamfered assembly groove. The oil slinger is provided with an inclined oil slinging surface. A gap is left between the low-speed shaft oil seal and the oil slinger. Combined with the oil guide surface and the oil return chamfered mouth, the effective throwing out and return of the lubricating oil can be achieved.
It effectively prevents lubricating oil from entering the low-speed shaft oil seal, improves the oil leakage of the gear box and improves the sealing performance.
Smart Images
Figure CN223375048U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of gear boxes, in particular to a low-speed shaft oil seal structure of a gear box. Background Art
[0002] Gearboxes, as an important mechanical device, are widely used in various industries. They can be used to change speed, change transmission direction and rotational torque, and distribute power to achieve multi-motor operation. Common lubrication methods for gearboxes include oil lubrication, semi-fluid grease lubrication, and solid lubricants.
[0003] For gearboxes lubricated with lubricating oil, the low-speed shaft usually uses an oil seal with comb teeth and an oil slinger. A 1-2mm gap is left between the oil seal and the oil slinger to achieve the purpose of sealing the oil. However, in some cases, the lubricating oil will still be discharged along with the low-speed shaft, thereby affecting the use effect of the gearbox.
[0004] Therefore, a gearbox low-speed shaft oil seal structure is proposed. Utility Model Content
[0005] In view of the above problems existing in the existing gearbox low-speed shaft oil seal structure, the present utility model is proposed.
[0006] Therefore, the purpose of the present invention is to provide a gearbox low-speed shaft oil seal structure to solve the problems raised in the background technology.
[0007] In order to achieve the above purpose, the present invention provides the following technical solutions:
[0008] A gearbox low-speed shaft oil seal structure comprises an upper housing, a lower housing and a low-speed shaft, wherein the low-speed shaft is arranged at the connection between the upper housing and the lower housing, and one end of the low-speed shaft extends to the outside of the upper housing and the lower housing; a low-speed shaft oil seal is provided at the connection between the low-speed shaft and the upper housing and the lower housing, an oil slinger is provided on the shaft wall of the low-speed shaft and inside the upper housing and the lower housing, an oil slinger is provided on both sides of the oil slinger, an inclined oil slinger surface is provided, an oil guide surface is provided on the side of the low-speed shaft oil seal facing the oil slinger, a gap is left between the low-speed shaft oil seal and the oil slinger, and the gap is 2-3mm.
[0009] Preferably, the inclination of the left oil-slinging surface of the oil-slinging ring is greater than the inclination of the right oil-slinging surface.
[0010] Preferably, the inclination of the oil guide surface on the side of the low-speed shaft oil seal opposite to the oil slinger ring is the same as the inclination of the oil slinger surface.
[0011] Preferably, an oil return chamfered port is provided on the inner side wall of the upper box body and above the oil slinger ring.
[0012] Furthermore, an oil discharge hole communicating with the lower box body is provided at the bottom of the low-speed shaft oil seal.
[0013] Preferably, chamfered assembly grooves that match each other are provided between the outer circle of the low-speed shaft oil seal and the outer side walls of the upper box body and the lower box body.
[0014] In the above technical solution, the technical effects and advantages provided by the utility model are:
[0015] 1. The utility model, by providing an oil-slinging surface on the oil-slinging ring and an oil-guiding surface on the low-speed shaft oil seal, can drive the oil-slinging ring to rotate during the rotation of the low-speed shaft, and the lubricating oil will be slung out along the oil-slinging surface on the inner side of the oil-slinging ring. Even if the lubricating oil enters between the low-speed shaft oil seal and the oil-slinging ring, it will be slung out along the oil-slinging surface and the oil-guiding surface between the low-speed shaft oil seal and the oil-slinging ring, thereby preventing the lubricating oil from entering the interior of the low-speed shaft oil seal, thereby greatly improving the oil leakage phenomenon of the gear box.
[0016] 2. The utility model provides an oil return chamfered port on the inner wall of the upper housing body. The lubricating oil falls on the inner wall of the upper housing body after being thrown out by the oil slinger ring, and then flows back along the oil return chamfered port to the gap between the low-speed shaft oil seal and the oil slinger ring, and then flows back to the lower housing body through the gap. In addition, an oil discharge hole is provided at the bottom of the low-speed shaft oil seal to discharge the lubricating oil at the bottom of the gap. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.
[0018] Figure 1 It is a structural diagram of the utility model;
[0019] Figure 2 For the utility model Figure 1 A magnified view of the structure of part A in the middle;
[0020] Figure 3 For the utility model Figure 1 Schematic diagram of the structure of the middle oil slinger.
[0021] Description of reference numerals:
[0022] 1. Upper housing; 2. Lower housing; 3. Low-speed shaft; 4. Low-speed shaft oil seal; 5. Oil slinger ring; 6. Oil slinger surface; 7. Oil guide surface; 8. Oil return chamfer; 9. Oil unloading hole. DETAILED DESCRIPTION
[0023] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.
[0024] The utility model provides Figure 1-3 The gearbox low-speed shaft oil seal structure shown includes an upper case body 1, a lower case body 2 and a low-speed shaft 3. The low-speed shaft 3 is arranged at the connection between the upper case body 1 and the lower case body 2, and one end of the low-speed shaft 3 extends to the outside of the upper case body 1 and the lower case body 2; a low-speed shaft oil seal 4 is provided at the connection between the low-speed shaft 3 and the upper case body 1 and the lower case body 2, and a chamfered assembly groove that matches each other is provided between the outer circle of the low-speed shaft oil seal 4 and the outer side wall of the upper case body 1 and the outer side wall of the lower case body 2, and the low-speed shaft 3 and the upper case body 1 and the lower case body 2 are matched with each other using H7 / g6. The low-speed shaft oil seal 4 can seal the connection between the low-speed shaft 3 and the upper case body 1 and the lower case body 2, and an oil slinger 5 is provided on the shaft wall of the low-speed shaft 3 and located inside the upper case body 1 and the lower case body 2. The oil slinger 5 is heat-fitted on the low-speed shaft 3 using interference fit. Both sides of the oil slinging ring 5 are provided with inclined oil throwing surfaces 6, the inclination of the left oil throwing surface 6 of the oil slinging ring 5 is greater than the inclination of the right oil throwing surface 6, and the low-speed shaft oil seal 4 is provided with an oil guide surface 7 on the side facing the oil slinging ring 5. The inclination of the oil guide surface 7 on the side opposite to the low-speed shaft oil seal 4 and the oil slinging ring 5 is the same as the inclination of the oil throwing surface 6. There is a gap between the low-speed shaft oil seal 4 and the oil slinging ring 5, and the gap is 2-3mm. The low-speed shaft 3 can drive the oil slinging ring 5 to rotate during rotation, and the lubricating oil will be thrown out along the oil throwing surface 6 on the inner side of the oil slinging ring 5. Even if the lubricating oil enters between the low-speed shaft oil seal 4 and the oil slinging ring 5, it will be thrown out along the oil throwing surface 6 and the oil guide surface 7 between the low-speed shaft oil seal 4 and the oil slinging ring 5, thereby preventing the lubricating oil from entering the interior of the low-speed shaft oil seal 4, greatly improving the oil leakage phenomenon of the gear box.
[0025] In order to be able to return the thrown lubricating oil, such as Figure 1 As shown, an oil return chamfered port 8 is provided on the inner wall of the upper housing 1 and above the oil slinger 5. After being thrown out by the oil slinger 5, the lubricating oil falls on the inner wall of the upper housing 1, and then flows back along the oil return chamfered port 8 to the gap between the low-speed shaft oil seal 4 and the oil slinger 5.
[0026] Finally, in order to be able to drain the lubricating oil at the bottom of the gap, such as Figure 2 As shown, an oil discharge hole 9 communicating with the lower housing 2 is provided at the bottom of the low-speed shaft oil seal 4 , and the lubricating oil at the bottom of the gap is discharged to the interior of the lower housing 2 through the oil discharge hole 9 .
[0027] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.
Claims
1. A gearbox low-speed shaft oil seal structure, comprising an upper housing (1), a lower housing (2) and a low-speed shaft (3), characterized in that: The low-speed shaft (3) is arranged at the connection between the upper case (1) and the lower case (2), and one end of the low-speed shaft (3) extends to the outside of the upper case (1) and the lower case (2); A low-speed shaft oil seal (4) is provided at the connection between the low-speed shaft (3) and the upper housing (1) and the lower housing (2); an oil slinger (5) is provided on the shaft wall of the low-speed shaft (3) and located inside the upper housing (1) and the lower housing (2); both sides of the oil slinger (5) are provided with inclined oil slinger surfaces (6); an oil guide surface (7) is provided on the side of the low-speed shaft oil seal (4) facing the oil slinger (5); a gap is left between the low-speed shaft oil seal (4) and the oil slinger (5), and the gap is 2-3 mm.
2. The gearbox low-speed shaft oil seal structure according to claim 1, characterized in that: The inclination of the left oil-slinging surface (6) of the oil-slinging ring (5) is greater than the inclination of the right oil-slinging surface (6).
3. The gearbox low-speed shaft oil seal structure according to claim 1, characterized in that: The inclination of the oil guide surface (7) on the side of the low-speed shaft oil seal (4) opposite to the oil slinger ring (5) is the same as the inclination of the oil slinger surface (6).
4. The gearbox low-speed shaft oil seal structure according to claim 1, characterized in that: An oil return chamfered opening (8) is provided on the inner side wall of the upper box body (1) and above the oil slinger ring (5).
5. The gearbox low-speed shaft oil seal structure according to claim 1, characterized in that: The bottom of the low-speed shaft oil seal (4) is provided with an oil discharge hole (9) which is in communication with the lower box body (2).
6. The gearbox low-speed shaft oil seal structure according to claim 1, characterized in that: Mutually matched chamfered assembly grooves are provided between the outer circle of the low-speed shaft oil seal (4) and the outer side walls of the upper box body (1) and the lower box body (2).