An oil seal structure for sealing oil and mud water of an axle
By adopting a skeleton oil seal structure, including a first oil seal and a second oil seal, on medium and heavy-duty trucks, the problem of oil seal wear caused by mud and water immersion is solved, achieving effective sealing and low-cost protection at high linear speeds.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHAANXI HANDE AXLE CO LTD
- Filing Date
- 2021-08-16
- Publication Date
- 2026-06-09
AI Technical Summary
In the transportation of construction waste and building materials in existing medium and heavy-duty trucks, the oil seals of ordinary axles cannot prevent long-term immersion in mud and water, leading to oil seal wear, water inlet groove wheel hub bearing burnout and other malfunctions.
The structure adopts a skeleton oil seal, including a first oil seal and a second oil seal. The first oil seal is used to seal oil, and the second oil seal is used to prevent mud, water and debris from entering. The sealing performance is improved by the lip design and spring structure, and a grease cavity is formed to protect the lip.
It effectively prevents mud and water from entering at high linear speeds, protects the axle cavity, reduces costs, and is suitable for repeated disassembly and reassembly, solving the problem of easy wear of ordinary oil seals at high linear speeds.
Smart Images
Figure CN115704473B_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of oil seal technology for oil sealing and waterproofing of drive axles of medium and heavy trucks, and particularly relates to an oil seal structure for sealing axles and preventing mud and water. Background Technology
[0002] Currently, medium and heavy-duty trucks are widely used in the transportation of construction waste and building materials. To meet the requirements of building beautiful urban environments, there is a common need for construction waste trucks and concrete mixer trucks to be washed in water tanks at construction sites. However, current ordinary axle oil seals cannot prevent long-term immersion in mud and water. Because oil seals cannot prevent mud and water from seeping in, the mud and water can penetrate the outer lip of the oil seal, causing the spacer ring to rust and wear, which in turn leads to wear on the lips of each oil seal. Ultimately, the mud and water can penetrate the oil seal and enter the wheel hub bearing, commonly resulting in failures such as wheel hub bearing seizure due to water ingress into the wheel hub oil seal within a short period of 1-3 months. Summary of the Invention
[0003] To address the shortcomings of the aforementioned background technology, this invention provides an oil seal structure for sealing oil and preventing mud and water in axles. This structure is a skeleton oil seal, where the oil-proof seal only seals the oil, while the outer oil seal prevents mud, water, and other debris from penetrating the mud-proof seal, thus protecting the sealing oil seal and protecting the axle's internal cavity. This structure is simple in design and provides reliable waterproof and oil-sealing performance. It retains the advantages of ordinary skeleton oil seals, such as low price, suitability for high-speed operation, low cost, simple assembly process requirements, and reusability. It eliminates the disadvantages of box-type oil seals, such as high assembly difficulty, high cost, inability to be disassembled and reused, and unsuitability for high-speed sealing environments.
[0004] This invention is specifically achieved through the following technical solutions:
[0005] An oil seal structure for sealing oil and preventing mud and water in vehicle axles is provided, including a first oil seal and a second oil seal;
[0006] The first oil seal and the second oil seal are fitted onto corresponding mounting holes and mounting shafts on the axle. Both the first oil seal and the second oil seal are interference-fitted with the mounting holes, and the lips of the first oil seal and the second oil seal are fitted with the mounting shaft.
[0007] The first oil seal is located inside the second oil seal. The first oil seal is used for ordinary oil sealing, and the second oil seal is used for blocking and sealing mud, water and debris.
[0008] As a further explanation of the present invention, the first oil seal and the second oil seal are either an integral or separate structure.
[0009] As a further explanation of the present invention, springs are provided on both the first oil seal and the second oil seal.
[0010] As a further explanation of the present invention, the first oil seal includes a main oil sealing lip; the first front lip angle of the main oil sealing lip faces the inner cavity of the drive axle, and the first rear lip angle of the main oil sealing lip faces the second oil seal.
[0011] As a further explanation of the present invention, the second oil seal includes a mud-proof main lip, an inner mud-proof secondary lip, and an outer mud-proof secondary lip;
[0012] The second front lip corner of the anti-mud main lip faces the anti-mud water side, and the second rear lip corner of the anti-mud main lip faces the first oil seal;
[0013] The outer anti-mud secondary lip is disposed on the anti-mud and water-proof side of the main anti-mud lip, and the inner anti-mud secondary lip is disposed on the second rear lip corner side of the main anti-mud lip.
[0014] As a further explanation of the present invention, the outer anti-mud lip includes a first anti-mud lip and a second anti-mud lip;
[0015] The first anti-mud sub-lip is disposed near the corner of the second front lip, and the second anti-mud sub-lip is disposed near the anti-mud water side;
[0016] The third rear lip corner of the first anti-mud secondary lip faces the side of the anti-mud primary lip, and the third front lip corner of the first anti-mud secondary lip faces the side of the anti-mud water; the fourth rear lip corner of the second anti-mud secondary lip faces the side of the first anti-mud secondary lip.
[0017] As a further explanation of the present invention, a cavity for storing grease is formed between the main anti-mud lip and the inner anti-mud secondary lip.
[0018] As a further explanation of the present invention, the first oil seal and the second oil seal are skeleton oil seals.
[0019] Compared with the prior art, the present invention has the following beneficial technical effects:
[0020] The present invention provides an oil seal structure for sealing oil and preventing mud and water in vehicle axles. The structure is a skeleton oil seal. The oil seal is only used for sealing oil, while the outer oil seal prevents mud, water and other debris from breaking through the mud and water prevention oil seal, thereby protecting the sealing oil seal and playing a role in protecting the inner cavity of the vehicle axle.
[0021] The oil seal structure for sealing axles and preventing mud and water provided by this invention is simple in structure and has reliable waterproof and oil sealing performance. It retains the advantages of ordinary skeleton oil seals, such as low price, suitability for high linear speed operation, low cost, low assembly process requirements, and reusability. It eliminates the disadvantages of box-type oil seals, such as high assembly difficulty, high cost, inability to be disassembled and reused, and unsuitability for high linear speed sealing environments. Attached Figure Description
[0022] Figure 1This is an assembly diagram of the oil seal structure for sealing axles and preventing mud and water, provided by the present invention.
[0023] Figure 2 This is a schematic diagram of the structure of the first oil seal of the oil seal structure for sealing axles and preventing mud and water provided by the present invention;
[0024] Figure 3 This is a schematic diagram of the second oil seal structure provided by the present invention for sealing oil and preventing mud and water on vehicle axles.
[0025] Explanation of reference numerals in the attached figures
[0026] Drive axle inner cavity 1, mounting hole 2, first oil seal 3, first rear lip angle 301, main oil sealing lip 302, first front lip angle 303, second oil seal 4, cavity 401, inner mud-proof secondary lip 402, mud-proof main lip 403, second rear lip angle 404, second front lip angle 405, third rear lip angle 406, third front lip angle 407, fourth rear lip angle 408, second mud-proof secondary lip 409, first mud-proof secondary lip 410, mounting shaft 5, spring 6. Detailed Implementation
[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0028] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.
[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0030] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0031] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0032] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0033] The technical solution of the present invention will be explained below with reference to specific embodiments.
[0034] like Figure 1-3 As shown, an oil seal structure for sealing axles and preventing mud and water is provided, including a first oil seal 3 and a second oil seal 4;
[0035] The first oil seal 3 and the second oil seal 4 are assembled on the corresponding mounting holes 2 and mounting shaft 5 on the axle. The first oil seal 3 and the second oil seal 4 are both interference fit with the mounting holes 2, and the lips of the first oil seal 3 and the second oil seal 4 are fitted with the mounting shaft 5.
[0036] The first oil seal 3 is located inside the second oil seal 4. The first oil seal 3 is used for ordinary oil sealing, and the second oil seal 4 is used to block and seal mud, water and debris.
[0037] In the above-mentioned oil seal structure used for sealing oil and preventing mud and water in axles, the oil seal for preventing oil leakage only seals the oil, while the outer oil seal prevents mud, water and other debris from breaking through the mud and water prevention oil seal, thereby protecting the sealing oil seal and playing a role in protecting the inner cavity of the axle.
[0038] Specifically, the first oil seal 3 includes a main sealing lip 302; the first front lip angle 303 of the main sealing lip 302 faces the inner cavity 1 of the drive axle, and the first rear lip angle 301 of the main sealing lip 302 faces the second oil seal 4. The function of the main sealing lip 302 is to prevent lubricating oil from entering the first rear lip angle 301 side of the first oil seal 3 from the side of the first front lip angle 303.
[0039] The second oil seal 4 includes a mud-proof main lip 403, an inner mud-proof secondary lip 402, and an outer mud-proof secondary lip; the second front lip corner 405 of the mud-proof main lip 403 faces the mud-proof water side, and the second rear lip corner 404 of the mud-proof main lip 403 faces the first oil seal 3; the outer mud-proof secondary lip is disposed on the mud-proof water side of the mud-proof main lip 403, and the inner mud-proof secondary lip 402 is disposed on the side of the second rear lip corner 404 of the mud-proof main lip 403.
[0040] More specifically, the outer anti-mud secondary lip includes a first anti-mud secondary lip 410 and a second anti-mud secondary lip 409; the first anti-mud secondary lip 410 is disposed near the second front lip corner 405, and the second anti-mud secondary lip 409 is disposed near the anti-mud water side; the third rear lip corner 406 of the first anti-mud secondary lip 410 faces the anti-mud main lip 403 side, and the third front lip corner 407 of the first anti-mud secondary lip 410 faces the anti-mud water side; the fourth rear lip corner 408 of the second anti-mud secondary lip 409 faces the first anti-mud secondary lip 410 side.
[0041] In this oil seal structure used for sealing axle oil and preventing mud and water, the second oil seal 4 firstly prevents mud and sand from entering the oil seal through the second anti-mud lip 409, thereby protecting the subsequent lip. Then, the first anti-mud lip 410 blocks and seals the ingress of small particles of mud and sand and mud and water. When mud or water breaks through the first anti-mud lip 410, the main anti-mud lip 403 blocks and seals the mud or water.
[0042] In one possible implementation, a cavity 401 for storing grease is formed between the main anti-mud lip 403 and the inner anti-mud secondary lip 402. The cavity 401 is used to store grease to lubricate the main anti-mud lip 403 and prevent premature wear of the lip caused by dry friction of the main anti-mud lip 403.
[0043] The first oil seal 3 and the second oil seal 4 are preferably skeleton oil seals; and the first oil seal 3 and the second oil seal 4 can be of an integral or separate structure.
[0044] Springs 6 are provided on both the first oil seal 3 and the second oil seal 4. The function of springs 6 is to increase the clamping force of the main lip of the oil seal on the shaft, which helps to maintain the oil seal clamping force.
[0045] In summary, the oil sealing and waterproofing oil seal structure for the axle provided in this application is preferably a skeleton oil seal. The oil-proof oil seal only seals the oil, while the outer oil seal prevents mud, water, and other debris from penetrating the mud-proof oil seal, thus protecting the sealing oil seal and protecting the axle's internal cavity. Furthermore, this structure is simple in design and has reliable waterproof and oil-sealing performance. It retains the advantages of ordinary skeleton oil seals, such as low price, suitability for high linear speed operation, low cost, low assembly process requirements, and reusability. It eliminates the disadvantages of box-type oil seals, such as high assembly difficulty, high cost, inability to be disassembled and reused, and unsuitability for high linear speed sealing environments.
[0046] The embodiments given above are preferred examples for implementing the present invention, and the present invention is not limited to the above embodiments. Any non-essential additions or substitutions made by those skilled in the art based on the technical features of the present invention are within the protection scope of the present invention.
Claims
1. An oil seal structure for sealing oil and preventing mud and water in vehicle axles, characterized in that, Including the first oil seal (3) and the second oil seal (4); The first oil seal (3) and the second oil seal (4) are assembled on the corresponding mounting holes (2) and mounting shaft (5) on the axle. The first oil seal (3) and the second oil seal (4) are both interference fit with the mounting holes (2), and the lips of the first oil seal (3) and the second oil seal (4) are fitted with the mounting shaft (5). The first oil seal (3) is located inside the second oil seal (4). The first oil seal (3) is used for ordinary oil sealing, and the second oil seal (4) is used to block and seal mud, water and debris. The first oil seal (3) includes a main oil sealing lip (302); the first front lip angle (303) of the main oil sealing lip (302) faces the inner cavity (1) of the drive axle, and the first rear lip angle (301) of the main oil sealing lip (302) faces the second oil seal (4); The second oil seal (4) includes a mud-proof main lip (403), an inner mud-proof secondary lip (402), and an outer mud-proof secondary lip; The second front lip corner (405) of the anti-mud main lip (403) faces the anti-mud water side, and the second rear lip corner (404) of the anti-mud main lip (403) faces the first oil seal (3); The outer anti-mud secondary lip is disposed on the anti-mud and water side of the main anti-mud lip (403), and the inner anti-mud secondary lip (402) is disposed on the side of the second rear lip corner (404) of the main anti-mud lip (403); The outer anti-mud lip includes a first anti-mud lip (410) and a second anti-mud lip (409); The first anti-mud sub-lip (410) is disposed near the second front lip corner (405), and the second anti-mud sub-lip (409) is disposed near the anti-mud water side; The third posterior lip corner (406) of the first anti-mud secondary lip (410) faces the anti-mud primary lip (403), and the third anterior lip corner (407) of the first anti-mud secondary lip (410) faces the anti-mud water side; the fourth posterior lip corner (408) of the second anti-mud secondary lip (409) faces the first anti-mud secondary lip (410).
2. The oil seal structure for sealing axles and preventing mud and water according to claim 1, characterized in that, The first oil seal (3) and the second oil seal (4) are either integral or separate structures.
3. The oil seal structure for sealing axles and preventing mud and water according to claim 1, characterized in that, Springs (6) are provided on both the first oil seal (3) and the second oil seal (4).
4. The oil seal structure for sealing axles and preventing mud and water according to claim 1, characterized in that, A cavity (401) for storing grease is formed between the main anti-mud lip (403) and the inner anti-mud secondary lip (402).
5. The oil seal structure for sealing axles and preventing mud and water according to claim 1, characterized in that, The first oil seal (3) and the second oil seal (4) are skeleton oil seals.