Protective sleeve for protecting oil seal
By designing protective sleeves and oil guiding structures on the gearbox housing and the motor gear shaft, the oil leakage problem at the connection between the gearbox housing and the gear shaft was solved, and the oil seal's sealing and lubrication effects were enhanced.
Patent Information
- Application Number
- CN202520393464.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-07
- Publication Date
- 2026-01-20
- Estimated Expiration
- 2035-03-07
AI Technical Summary
The oil seal at the connection between the gearbox housing and the gear shaft has oil leakage problems and reduced sealing performance, affecting the performance.
A protective sleeve is designed, comprising a protective sleeve body, an oil guide plate, and an inclined oil guide groove. It is connected to the gearbox housing and the motor gear shaft by an interference fit. The oil guide plate and the inclined oil guide groove are used to guide the oil back to the bearing for secondary lubrication and cooling, thereby enhancing the sealing performance.
It effectively reduces oil leakage, enhances the sealing strength of gearbox oil seals, and improves sealing performance and lubrication.
Smart Images
Figure CN223814331U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of oil seal protection sleeve, specifically relates to a protection sleeve for protecting oil seal. BACKGROUND
[0002] Oil seal is the customary designation of general seal, simply is the sealing of lubricating oil. It is used to seal grease (oil is the most common liquid substance in the transmission system, also refers to the general liquid substance) mechanical element, it will be isolated from the transmission components that need to be lubricated and the output component, so as to prevent lubricating oil from leaking. Static seal and dynamic seal (general reciprocating motion) seal is called oil seal.
[0003] The oil seal at the connection between the gear box shell and the gear shaft has the problem of oil leakage during use, and the sealing property is reduced for a long time, which affects use. CONTENT OF THE UTILITY MODEL
[0004] In order to solve the problems in the above background art, the utility model provides a protection sleeve for protecting oil seal, which has the characteristics of simple structure, easy processing, low cost and good sealing property.
[0005] In order to achieve the above object, the utility model provides the following technical scheme: a protection sleeve for protecting oil seal, which comprises a protection sleeve body, the protection sleeve body is clamped in the middle of the mounting groove of the gear box shell, the surface of the gear box shell is provided with a circulating oil guide groove, the upper end of the protection sleeve body is provided with an oil guide plate, the surface of the oil guide plate is provided with an inclined oil guide groove, and the outer surface of the protection sleeve body is provided with an oil seal lip cooperation surface.
[0006] Preferably, the middle of the gear box shell is connected with a motor gear shaft.
[0007] Preferably, the motor gear shaft is composed of a motor rotating shaft and a gear box rotating shaft, and the motor gear shaft is of an integrated structure.
[0008] Preferably, the inner wall of the protection sleeve body is in interference fit connection with the surface of the motor gear shaft.
[0009] Preferably, the side edge of the protection sleeve body is connected with a gear box oil seal, and the oil seal lip cooperation surface is in interference fit with the inner wall of the gear box oil seal.
[0010] Compared with the prior art, the utility model has the beneficial effects that:
[0011] The inner wall of the protection sleeve body is in interference fit connection with the surface of the motor gear shaft, the oil seal lip cooperation surface is in interference fit with the inner wall of the gear box oil seal, the oil liquid enters the bearing and is guided back into the bearing again through the oil guide plate and the inclined oil guide groove, the bearing is lubricated and cooled twice, and only a small part of the oil liquid will flow to the gear box oil seal, so that the sealing strength of the gear box oil seal is indirectly enhanced. BRIEF DESCRIPTION OF DRAWINGS
[0012] Figure 1 It is the structure schematic view of protective sleeve body of the utility model;
[0013] Figure 2 It is the installation structure schematic view of protective sleeve body of the utility model;
[0014] Figure 3 It is the gear box casing structure schematic view of the utility model;
[0015] Figure 4 It is the A place enlarged view of the utility model; Figure 2
[0016] In the drawing: 1, protective sleeve body;11, oil guide plate;12, inclined oil guide groove;13, oil seal lip cooperation face;2, gear box casing;3, bearing;4, motor gear shaft;5, gear box oil seal;6, circulating oil guide groove. DETAILED DESCRIPTION
[0017] The technical scheme in the embodiments of the utility model will be apparently and completely described below with the drawings in the embodiments of the utility model, and apparently, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skill in the art without creative labor belong to the scope of protection of the utility model.
[0018] Please refer to Figures 1-4 The utility model provides the following technical scheme: a protective sleeve of oil seal, including protective sleeve body 1, the protective sleeve body 1 is clamped in the installation groove of gear box casing 2 middle, the surface of gear box casing 2 is provided with circulating oil guide groove 6, the upper end of protective sleeve body 1 is provided with oil guide plate 11, the surface of oil guide plate 11 is provided with inclined oil guide groove 12, the outer surface of protective sleeve body 1 is provided with oil seal lip cooperation face 13.
[0019] Specifically, the middle of gear box casing 2 is connected with motor gear shaft 4.
[0020] Specifically, motor gear shaft 4 is composed of motor rotating shaft and gear box rotating shaft, and motor gear shaft 4 is of integral structure.
[0021] Specifically, the inner wall of protective sleeve body 1 is connected with the surface of motor gear shaft 4 in interference fit.
[0022] Specifically, gear box oil seal 5 is connected to the side edge of protective sleeve body 1, and oil seal lip cooperation face 13 is interference-fitted with the inner wall of gear box oil seal 5.
[0023] The utility model discloses a working principle and use flow: the utility model uses, installs protective sheath body 1 in the middle groove of gear box casing 2, and the inner wall of protective sheath body 1 is connected with the surface of motor gear shaft 4 with interference fit, and oil seal lip cooperation surface 13 is interferingly fitted with the inner wall of gear box oil seal 5, and after oil enters bearing 3, it is guided back to bearing 3 again through oil guide plate 11 and inclined oil guide groove 12, and bearing 3 is lubricated and cooled twice, and only a small part of oil will flow to gear box oil seal 5, and the sealing strength of gear box oil seal 5 is indirectly enhanced.
[0024] Although the embodiments of the utility model have been shown and described, it can be understood by those of ordinary skill in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.
Claims
1. A protective sleeve for protecting an oil seal, comprising a protective sleeve body (1), characterized in that: The protective sleeve body (1) is snapped into the middle of the mounting groove of the gearbox housing (2). The surface of the gearbox housing (2) is provided with a circulating oil guide groove (6). The upper end of the protective sleeve body (1) is provided with an oil guide plate (11). The surface of the oil guide plate (11) is provided with an inclined oil guide groove (12). The outer surface of the protective sleeve body (1) is provided with an oil seal lip mating surface (13).
2. The protective sleeve for protecting an oil seal according to claim 1, characterized in that: The gearbox housing (2) is connected in the middle to a motor gear shaft (4).
3. The protective sleeve for protecting an oil seal according to claim 2, characterized in that: The motor gear shaft (4) consists of a motor shaft and a gearbox shaft, and the motor gear shaft (4) is an integral structure.
4. The protective sleeve for protecting an oil seal according to claim 2, characterized in that: The inner wall of the protective sleeve body (1) is interference-fitted with the surface of the motor gear shaft (4).
5. The protective sleeve for protecting an oil seal according to claim 1, characterized in that: The protective sleeve body (1) is connected to a gearbox oil seal (5) on its side, and the oil seal lip mating surface (13) is interference-fitted with the inner wall of the gearbox oil seal (5).