Oil seal structure for an intermediate support assembly

Abstract

The utility model discloses an oil seal structure of intermediate support assembly, including oil seal outer framework, oil seal inner framework, inner blade mouth and outer blade mouth, and oil seal outer framework is annular, and the end of oil seal outer framework is outwardly bent and forms the baffle, and the section of inner framework is annular and is L type, and inner framework is engaged in the baffle, and outer blade mouth is annular and is provided with the clamping slot on its edge. The utility model discloses oil seal outer framework and oil seal inner framework adopt the excess pressure and install into one whole oil seal assembly, and inner blade mouth can not only realize the sliding of intermediate support assembly on the intermediate spline shaft neck, but also seals the grease in the inner chamber of intermediate support assembly, prevents sundries from entering the inner chamber of intermediate support assembly, can discharge the extra grease simultaneously, and outer blade mouth protects inner blade mouth from directly contacting the sand, prevents the sand from damaging the first group oil seal formed by inner blade mouth and oil seal inner framework under the bad environment, prolongs the life of the first group oil seal, also prolongs the life of intermediate support assembly.

Description

Technical Field

[0001] This utility model relates to the field of intermediate support technology for transmission shafts, and more specifically, to an oil seal structure for an intermediate support assembly. Background Technology

[0002] The automotive driveshaft assembly connects the gearbox and the rear axle. To avoid vehicle resonance and reduce vibration, when the driveshaft assembly reaches a certain length, it needs to be divided into multiple sections. The intermediate driveshaft and support assembly is equipped with an intermediate support assembly, which is mounted on the frame to compensate for driveshaft installation errors and accommodate displacement caused by engine movement due to elastic suspension and frame deformation during driving.

[0003] Because the driveshaft assembly rotates at high speed, while the lower bracket of the intermediate support assembly is mounted on the vehicle crossbeam and cannot rotate, the intermediate support assembly is equipped with ball bearings. To ensure the life of the bearings, the inner cavity of the intermediate support assembly is lubricated with grease and kept clean.

[0004] Requirements for the inner cavity of the intermediate support assembly: First, it is necessary to prevent mud and sand from entering the inner cavity to avoid shortening the life of the bearing due to impurities; second, it is necessary to remove the old grease when adding grease regularly; and third, it is necessary to allow air to circulate when the bearing rotates and heats up.

[0005] Because of the sliding motion, the intermediate support assembly of the axial sliding structure cannot use fixed metal dust covers on both sides of the outer side for waterproofing and dustproofing. Only oil seals can be used for sealing. In harsh working environments, the oil seals come into direct contact with mud and sand, which accelerates the damage of the oil seals. A new type of oil seal needs to be designed to both prevent debris from entering the inner cavity to protect the oil seal, allow air to pass through, and enable axial sliding motion. Utility Model Content

[0006] This invention provides an oil seal structure for an intermediate support assembly to solve the problem that poor sealing performance of existing intermediate support assemblies affects their service life.

[0007] According to one aspect of the present invention, an oil seal structure for an intermediate support assembly is provided, comprising an outer oil seal skeleton, an inner oil seal skeleton, an inner cutting edge, and an outer cutting edge. The outer oil seal skeleton is annular, and its ends are bent outward to form a flange. The inner oil seal skeleton is an L-shaped ring with the inner oil seal skeleton engaged within the flange. The outer cutting edge is annular and has a groove on its edge that engages with the inner edge of the outer oil seal skeleton. The inner cutting edge is annular and has a mounting groove on its outer edge that engages with the inner edge of the inner oil seal skeleton. The inner edge of the inner cutting edge extends obliquely towards the center to form a skirt.

[0008] Based on the above solution, a preferred embodiment is provided with an opening groove at the center of the skirt edge, so that the skirt edge forms an outer skirt edge and an inner skirt edge, with the inner skirt edge located on the side closer to the outer cutting edge.

[0009] Preferably, based on the above scheme, a slanted skirt is provided on the end face of the inner cutting edge near the outer cutting edge, and the slanted skirt extends outward to abut against the inner side of the oil seal outer skeleton.

[0010] Based on the above scheme, a preferred embodiment is provided with vent holes on the end face where the inner skeleton of the oil seal connects to the inner cutting edge, and the vent holes are arranged in multiple evenly spaced intervals.

[0011] Based on the above scheme, a preferred embodiment is provided on the end face of the outer skeleton of the oil seal away from the inner skeleton of the oil seal, which is also provided with a deposition groove.

[0012] Based on the above scheme, the preferred embodiment is that the oil seal outer skeleton and the outer cutting edge are vulcanized into an integral structure.

[0013] Based on the above scheme, the inner skeleton of the oil seal and the inner cutting edge are vulcanized into an integral structure.

[0014] Based on the above scheme, the inner and outer cutting edges are preferably made of rubber, and the outer and inner skeletons of the oil seal are made of steel frames.

[0015] This utility model discloses an oil seal structure for an intermediate support assembly. The outer and inner skeletons of the oil seal are assembled into a single integral oil seal assembly using interference fitting. The inner cutting edge not only allows the intermediate support assembly to slide on the journal of the intermediate spline shaft, but also seals the grease within the inner cavity of the intermediate support assembly, preventing debris from entering and allowing excess grease to drain. Meanwhile, the outer cutting edge protects the inner cutting edge from direct contact with mud and sand, preventing damage to the first group of oil seals formed by the inner cutting edge and the inner skeleton of the oil seal in harsh environments, thus extending the life of the first group of oil seals and consequently extending the life of the intermediate support assembly.

[0016] Meanwhile, there are vent holes on the end face of the inner skeleton of the oil seal, which allow for venting and grease removal when the bearing rotates and heats up, preventing the intermediate support assembly from accelerating bearing wear due to excessive internal temperature. Moreover, the combination of the outer skeleton and inner skeleton of the oil seal, along with the vent hole design, forms an oil seal cutting edge that functions similarly to a one-way valve. This not only allows for venting but also prevents debris entering through the second set of oil seal cutting edges, which consists of the outer cutting edge and the outer skeleton of the oil seal, from entering the inner cavity of the intermediate support through the vent holes, thus keeping the inner cavity clean.

[0017] This utility model, by adopting the intermediate support oil seal of this structure, can still achieve the axial sliding function of the intermediate support assembly while increasing the sealing of the sliding intermediate support assembly. The method is simple and easy to implement, with significant effects, and has value for promotion in the automotive industry. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0019] Figure 1 This is a schematic diagram of the installation of the oil seal structure of the intermediate support assembly of this utility model;

[0020] Figure 2 This is a schematic diagram of the oil seal structure of the intermediate support assembly of this utility model;

[0021] Figure 3 This is a right view of the inner frame structure of the intermediate support assembly of this utility model;

[0022] Figure 4 For the present utility model Figure 2 Enlarged view of Part I;

[0023] Explanation of icon numbers:

[0024] 10. Oil seal outer skeleton; 11. Flange; 12. Deposition tank; 13. Limiting flange; 20. Oil seal inner skeleton; 21. Vent hole; 30. Inner cutting edge; 31. Mounting groove; 32. Skirt; 34. Opening groove; 35. Outer skirt; 36. Inner skirt; 37. Slanted skirt; 40. Outer cutting edge; 41. Slot; 50. Intermediate spline shaft; 51. Bearing; 52. Support inner skeleton; 53. Support rubber gasket ring; 54. Support lower bracket; 55. Flange; 100. Area A; 200. Cavity B; 300. Cavity C. Detailed Implementation

[0025] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0026] It should be understood that, when used in this specification and the appended claims, the term "comprising" indicates the presence of a descriptive feature, integral, step, operation, element, and / or component, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or sets.

[0027] To keep the drawings concise, only the parts relevant to this invention are shown schematically in each figure, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of the components with the same structure or function is schematically depicted, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0028] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0029] In the embodiments shown in the accompanying drawings, the directional indications (such as up, down, left, right, front, and back) used to explain the structure and movement of the various components of this invention are relative rather than absolute. These descriptions are appropriate when these components are in the positions shown in the drawings. If the descriptions of the positions of these components change, these directional indications also change accordingly.

[0030] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0032] Please see Figure 2 and combined Figure 3 and Figure 4 As shown, the oil seal structure of an intermediate support assembly of this utility model includes an annular oil seal outer skeleton 10, an oil seal inner skeleton 20, an inner cutting edge 30, and an outer cutting edge 40.

[0033] Specifically, the end of the outer skeleton 10 of the oil seal is bent outward to form a flange 11, the inner skeleton is an L-shaped ring, the inner skeleton 20 of the oil seal is engaged in the flange 11, and the free end of the flange 11 is bent outward to form a limiting flange 13, which limits the inner skeleton 20 of the oil seal within the space formed by the flange 11, the limiting flange 13 and the outer skeleton 10 of the oil seal.

[0034] The outer cutting edge 40 of this utility model is annular and has a groove 41 on its edge that engages with the inner edge of the oil seal outer skeleton 10. The inner cutting edge 30 is annular and has an mounting groove 31 on its outer edge that engages with the inner edge of the oil seal inner skeleton 20. The inner edge of the inner cutting edge 30 extends obliquely towards the center to form a skirt 32.

[0035] The intermediate support assembly of this invention includes an intermediate spline shaft 50, a flange 55, a bearing 51, an inner support frame 52, a support rubber pad ring 53, and a lower support bracket 54. The bearing 51 is mounted on the intermediate spline shaft 50 and the flange 55. The lower support bracket 54 is mounted on the outer circumferential surface of the inner support frame 52 via the support rubber pad ring. The inner support frame 52 is fitted onto the bearing 51. The oil seal structure of this invention is fitted onto the intermediate spline shaft 50 or the flange 55 and is located at both ends of the bearing 51. It is limited by the inner edge surface of the inner support frame 52 to the outer edge surface of the oil seal outer frame 10. For details, please refer to [link to specific structure description]. Figure 1 As shown.

[0036] Specifically, the skirt 32 of this utility model has an opening groove 34 at its center, forming an outer skirt edge 35 and an inner skirt edge 36, with the inner skirt edge 36 located on the side closer to the outer cutting edge 40. Furthermore, an oblique skirt edge 37 is also provided on the end face of the inner cutting edge 30 on the side closer to the outer cutting edge 40, extending outward and abutting against the inner side of the oil seal outer frame 10.

[0037] This invention also provides vent holes 21 on the end face where the inner skeleton 20 of the oil seal connects to the inner cutting edge 30. The vent holes 21 are arranged in multiple evenly spaced intervals. When the bearing 51 rotates and heats up, it exhausts and removes grease, preventing the intermediate support assembly from accelerating the wear of the bearing 51 due to excessively high internal temperature.

[0038] Furthermore, this utility model also provides a sedimentation groove 12 on the end face of the outer skeleton 10 of the oil seal away from the inner skeleton 20 of the oil seal. The sedimentation groove 12 is designed to deposit mud and sand, preventing the mud and sand from flowing downward to the oil seal cutting edge.

[0039] Preferably, the outer skeleton 10 of the oil seal and the outer cutting edge 40 are vulcanized into an integral structure, and the inner skeleton 20 of the oil seal and the inner cutting edge 30 are vulcanized into an integral structure. The inner cutting edge 30 and the outer cutting edge 40 are rubber bodies, and the outer skeleton 10 and the inner skeleton 20 of the oil seal are steel frames.

[0040] After installation, the inner cutting edge 30 of this utility model can effectively ensure that the grease is sealed in the inner cavity A area 100 of the intermediate support assembly. When the grease needs to overflow, it is discharged into the C cavity 300 by the two sets of inner cutting edges 30 that are in contact with the intermediate spline shaft 50 or flange, and then discharged to the outside through the outer cutting edge 40.

[0041] When the intermediate support assembly cavity A section 100 needs to vent outward, the vent is discharged through the vent 21 on the inner oil seal skeleton 20 into cavity B 200, then through the end face of the inner cutting edge 30 into cavity C 300, and finally through the outer oil seal skeleton 10 to the outside. The end face of the inner cutting edge 30 acts as a one-way valve to prevent debris entering through the inner cutting edge 30 from entering the intermediate support cavity through the vent 21.

[0042] This utility model discloses an oil seal structure for an intermediate support assembly. The outer oil seal skeleton 10 and the inner oil seal skeleton 20 are assembled into an integral oil seal assembly using interference fitting. The inner cutting edge 30 not only allows the intermediate support assembly to slide on the journal of the intermediate spline shaft 50, but also seals the grease inside the intermediate support assembly, preventing debris from entering the inner cavity of the intermediate support assembly, while also allowing excess grease to be discharged. The outer cutting edge 40 does not directly contact mud and sand, preventing mud and sand from damaging the outer oil seal formed by the inner cutting edge 30 and the inner oil seal skeleton 20 in harsh environments, thus extending the life of the outer oil seal and also extending the life of the intermediate support assembly.

[0043] Meanwhile, the inner skeleton of the oil seal 20 has a vent hole 21 on its end face, which allows for venting and grease removal when the bearing 51 rotates and heats up, preventing the intermediate support assembly from accelerating the wear of the bearing 51 due to excessive internal temperature. Moreover, the combination of the outer skeleton of the oil seal 10 and the inner skeleton of the oil seal 20, along with the design of the vent hole 21, forms an oil seal cutting edge that functions similarly to a one-way valve. This allows for venting and also prevents debris entering from the inner oil seal cutting edge from entering the inner cavity of the intermediate support through the vent hole 21, thus keeping the inner cavity clean.

[0044] This utility model, by adopting the intermediate support oil seal of this structure, can still achieve the axial sliding function of the intermediate support assembly while increasing the sealing of the sliding intermediate support assembly. The method is simple and easy to implement, with significant effects, and has value for promotion in the automotive industry.

[0045] Finally, the method described in this application is merely a preferred embodiment and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. An oil seal structure for an intermediate support assembly, characterized in that, The oil seal includes an outer skeleton, an inner skeleton, an inner cutting edge, and an outer cutting edge. The outer skeleton is annular, and its ends are bent outward to form a flange. The inner skeleton is an L-shaped ring that engages with the flange. The outer cutting edge is annular and has a groove on its edge that engages with the inner edge of the outer skeleton. The inner cutting edge is annular and has a mounting groove on its outer edge that engages with the inner edge of the inner skeleton. The inner edge of the inner cutting edge extends obliquely towards the center to form a skirt.

2. The oil seal structure of the intermediate support assembly as described in claim 1, characterized in that, An opening groove is provided at the center of the skirt edge, so that the skirt edge forms an outer skirt edge and an inner skirt edge, with the inner skirt edge located on the side closer to the outer cutting edge.

3. The oil seal structure of the intermediate support assembly as described in claim 2, characterized in that, A slanted skirt is also provided on the end face of the inner cutting edge near the outer cutting edge, and the slanted skirt extends outward to abut against the inner side of the oil seal outer frame.

4. The oil seal structure of an intermediate support assembly as described in claim 1, characterized in that, The inner skeleton of the oil seal is provided with vent holes on the end face where it connects to the inner cutting edge. The vent holes are arranged in multiple evenly spaced intervals.

5. The oil seal structure of an intermediate support assembly as described in claim 1, characterized in that, The end face of the outer skeleton of the oil seal, which is opposite to the inner skeleton of the oil seal, is also provided with a deposition tank for coloring.

6. The oil seal structure of the intermediate support assembly as described in claim 1, characterized in that, The oil seal outer skeleton and the outer cutting edge are vulcanized into a single structure.

7. The oil seal structure of an intermediate support assembly as described in claim 1, characterized in that, The inner skeleton of the oil seal and the inner cutting edge are vulcanized into a single structure.

8. The oil seal structure of an intermediate support assembly as described in claim 1, characterized in that, The inner and outer cutting edges are made of rubber, while the outer and inner skeletons of the oil seal are made of steel.

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