CN213575539U - High-speed bidirectional rotary oil seal for electric vehicle gearbox - Google Patents
High-speed bidirectional rotary oil seal for electric vehicle gearbox Download PDFInfo
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- CN213575539U CN213575539U CN202022429696.3U CN202022429696U CN213575539U CN 213575539 U CN213575539 U CN 213575539U CN 202022429696 U CN202022429696 U CN 202022429696U CN 213575539 U CN213575539 U CN 213575539U
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- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 14
- 238000007789 sealing Methods 0.000 claims abstract description 39
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 230000004323 axial length Effects 0.000 claims description 4
- 238000005086 pumping Methods 0.000 abstract description 2
- 230000002337 anti-port Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000004809 Teflon Substances 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- HEMJJKBWTPKOJG-UHFFFAOYSA-N Gemfibrozil Chemical compound CC1=CC=C(C)C(OCCCC(C)(C)C(O)=O)=C1 HEMJJKBWTPKOJG-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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- Sealing Of Bearings (AREA)
Abstract
The utility model relates to the technical field of oil seals, in particular to a high-speed bidirectional rotary oil seal for an electric vehicle gearbox, which comprises a framework and a seal body arranged on the framework, wherein the middle part of the seal body is provided with a shaft hole for a rotating shaft to pass through, one end of the seal body positioned in the shaft hole is extended with a main seal lip, and the other end is extended with an auxiliary seal lip, the utility model adopts the main seal lip without a spring to match with the design of a spiral oil return groove and a leveling seal section on the main seal lip, thereby sealing the high-speed forward rotation of the rotating shaft by the pumping action of the spiral oil return groove to realize better sealing performance under the working condition of high rotating speed, directly clasping the leveling seal section on the rotating shaft, ensuring the low-speed reverse rotation of the rotating shaft for a short time without leakage, realizing better sealing performance under the working condition of low-speed reverse rotation, and thinning the main seal, effectively reduce the friction of oil blanket and rotation axis surface and the comprehensive power of holding tightly of main seal lip.
Description
Technical Field
The utility model belongs to the technical field of the oil blanket technique and specifically relates to an electric motor car gearbox is with high-speed two-way gyration oil blanket.
Background
At present, the gearbox oil seals on the market mainly have various types, and each type has advantages and disadvantages. The traditional TC type oil seal is stable in work, wide in adaptation working condition and large in power consumption. The Teflon oil seal has wide temperature range, low lip friction coefficient, large lip pressing force, slightly reduced friction power loss compared with the traditional oil seal, sensitivity to oil product deterioration and dust and high requirements on oil products and environment. If the requirements of lower friction, higher following and higher linear speed are met, the spring-free rubber low-torque oil seal is mentioned, the lip part pressing force is very low, the friction power loss is slightly reduced compared with a Teflon oil seal, the oil seals have the characteristics, but the spring-free rubber low-torque oil seal is more suitable for the high-rotating-speed working condition of the electric vehicle gearbox;
however, the one-way oil return line oil seal on the market at present can only play a role in sealing the high-rotating-speed working condition of the electric vehicle gearbox, but has poor sealing effect on the low-speed reversing working condition, and is easy to cause oil leakage when the low-speed reversing is performed.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: in order to solve the problems that in the prior art, a one-way oil return line oil seal only can play a role in sealing the high-speed working condition of an electric vehicle gearbox, but has poor sealing effect on the low-speed reversing working condition and is easy to cause oil leakage when the low-speed reversing is performed, a high-speed two-way rotary oil seal for the electric vehicle gearbox is provided, can adapt to complicated high-speed working condition and short-time low-speed reversing working condition, effectively reduces friction power loss and lip pressing force, and is simple in structure and low in cost.
The utility model provides a technical scheme that its technical problem adopted is: the utility model provides an electric motor car gearbox is with high-speed two-way gyration oil blanket, includes the skeleton and establishes the seal on the skeleton, the middle part of seal has the shaft hole that supplies the rotation axis to pass, the one end that lies in the shaft hole on the seal extends there is main seal lip, and the other end extends there is vice seal lip, be equipped with spiral oil return groove on the inner circle wall of main seal lip to form the spiral oil return line that is used for with the rotation axis contact, leave the interval in the axial between the top end of main seal lip inner circle wall and the top end of spiral oil return line and form the level and smooth seal section.
Through the main seal lip that adopts no spring in this scheme, spiral oil gallery and the design of level and smooth seal section on the cooperation, thereby the high-speed forward rotation of rotation axis is sealed by the pump suction effect of spiral oil gallery, with the realization possess better sealing performance under high rotational speed operating mode, level and smooth seal section is direct to be held tightly on the rotation axis, then can guarantee the low-speed antiport of rotation axis short time and not leak, with the realization shows better sealing performance under the low-speed operating mode that reverses, and can be done thin with main seal lip, effectively reduce the oil blanket and the friction on rotation axis surface and the comprehensive power of holding tightly of main seal lip.
Further, the axial length L of the flat sealing section is 0.2mm-0.6 mm.
Further, the cross-sectional shape of the spiral oil return line is semicircular, or one side of the cross-sectional shape is semicircular.
Further, the primary seal lip is inclined outward from top to bottom.
Further, the primary sealing lip is conical.
Further, the secondary sealing lip is inclined inwards from top to bottom.
Furthermore, the sealing body covers the lower end of the outer peripheral surface of the framework, and the upper end of the outer peripheral surface of the framework is exposed outside; by adopting the design of a semi-exposed framework, the framework can be exposed outside and fixed, the installation is firmer, and the framework is not easy to fall off at high rotating speed.
Further, the sealing body is made of rubber.
The utility model has the advantages that: the utility model discloses a high-speed two-way gyration oil blanket for electric motor car gearbox is through adopting the main seal lip of no spring, the cooperation spiral oil gallery reaches the design of level and smooth seal section on it, thereby the pump suction by the spiral oil gallery seals the high-speed forward rotation of rotation axis, with the realization possess better sealing performance under high rotational speed operating mode, level and smooth seal section directly hug closely on the rotation axis, then can guarantee the low-speed antiport of rotation axis short time and not leak, show better sealing performance under the operating mode that the realization overturns at the low-speed, and can be thin with main seal lip, effectively reduce the oil blanket and the friction on rotation axis surface and the comprehensive power of hugging closely of main seal lip.
Drawings
The present invention will be further explained with reference to the drawings and examples.
FIG. 1 is a schematic view of the high-speed bidirectional rotary oil seal for the electric vehicle transmission of the present invention;
FIG. 2 is an enlarged partial schematic view of A of FIG. 1;
fig. 3 is the three-dimensional schematic diagram of the high-speed bidirectional rotary oil seal for the electric vehicle gearbox of the utility model.
In the figure: 1. the sealing structure comprises a framework, 2, a sealing body, 201, shaft holes, 202, a main sealing lip, 2021, a spiral oil return groove, 2022, a spiral oil return line, 2023, a flat sealing section, 203 and an auxiliary sealing lip;
l: the axial length of the seal segments is flattened.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic drawings, which illustrate the basic structure of the invention only in a schematic way, and thus show only the components that are relevant to the invention, and the directions and references (e.g., upper, lower, left, right, etc.) may be used only to help describe the features in the drawings. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the claimed subject matter is defined only by the appended claims and equivalents thereof.
Example 1
As shown in fig. 1-3, a high-speed bidirectional rotary oil seal for an electric vehicle transmission comprises a framework 1 and a sealing body 2 arranged on the framework 1, wherein a shaft hole 201 for a rotating shaft to pass through is formed in the middle of the sealing body 2, a main sealing lip 202 extends from one end of the sealing body 2, which is located in the shaft hole 201, and an auxiliary sealing lip 203 extends from the other end of the sealing body, a spiral oil return groove 2021 is formed in the inner ring wall of the main sealing lip 202, a spiral oil return line 2022 for contacting with the rotating shaft is formed, and a gap is formed between the top end of the inner ring wall of the main sealing lip 202 and the top end of the spiral oil return line 2022 in the axial direction to form a flat sealing section.
The axial length L of the flat sealing section 2023 is 0.2mm to 0.6 mm.
The cross-sectional shape of the spiral oil return line 2022 is a semicircle, or one side of the cross-sectional shape is a semicircle.
The primary seal lip 202 is inclined outwardly from top to bottom.
The primary seal lip 202 is conical.
The secondary seal lip 203 is inclined inward from top to bottom.
The sealing body 2 covers the lower end of the outer peripheral surface of the framework 1, and the upper end of the outer peripheral surface of the framework 1 is exposed outside; by adopting the semi-exposed framework 1 type design, the framework 1 can be fixedly installed at the exposed part, so that the installation is firmer and the framework is not easy to fall off at high rotating speed.
The sealing body 2 is made of rubber.
The high-speed bidirectional rotary oil seal for the electric vehicle gearbox in the embodiment can adapt to complex high-speed working conditions and short-time low-speed reversing working conditions, and can be particularly used for the electric vehicle gearbox.
It is through adopting the main seal lip 202 of no spring, the design of spiral oil groove 2021 and level and smooth seal section 2023 on it, thereby the high-speed forward rotation of rotation axis is sealed by the pumping action of spiral oil groove 2021, in order to realize possessing better sealing performance under high rotational speed operating mode, level and smooth seal section 2023 is directly embraced tightly on the rotation axis, then can guarantee the low-speed antiport of rotation axis short time and not leak, in order to realize showing better sealing performance under the operating mode that the low-speed reverses, and can make thin main seal lip 202, effectively reduce the friction of oil blanket and rotation axis surface and the comprehensive power of embracing tightly of main seal lip 202.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (8)
1. The utility model provides an electric motor car gearbox is with two-way gyration oil blanket of high speed, includes skeleton (1) and establishes seal (2) on skeleton (1), the middle part of seal (2) has shaft hole (201) that supply the rotation axis to pass, the one end that lies in shaft hole (201) on seal (2) extends and has main seal lip (202), and the other end extends and has vice seal lip (203), its characterized in that: the inner ring wall of the main seal lip (202) is provided with a spiral oil return groove (2021) and forms a spiral oil return line (2022) which is used for being contacted with a rotating shaft, and a gap is reserved between the top end part of the inner ring wall of the main seal lip (202) and the top end part of the spiral oil return line (2022) in the axial direction to form a flat seal section (2023).
2. The high-speed bidirectional rotary oil seal for the electric vehicle gearbox as recited in claim 1, wherein: the axial length L of the flat sealing section (2023) is 0.2mm-0.6 mm.
3. The high-speed bidirectional rotary oil seal for the electric vehicle gearbox as recited in claim 1, wherein: the cross section of the spiral oil return line (2022) is semicircular, or one side of the cross section is semicircular.
4. The high-speed bidirectional rotary oil seal for the electric vehicle gearbox as recited in claim 1, wherein: the primary seal lip (202) is inclined outwards from top to bottom.
5. The high-speed bidirectional rotary oil seal for the electric vehicle gearbox as recited in claim 4, wherein: the primary seal lip (202) is conical.
6. The high-speed bidirectional rotary oil seal for the electric vehicle gearbox as recited in claim 4, wherein: the secondary sealing lip (203) is inclined inwards from top to bottom.
7. The high-speed bidirectional rotary oil seal for the electric vehicle gearbox as recited in claim 1, wherein: the sealing body (2) covers the lower end of the outer peripheral surface of the framework (1), and the upper end of the outer peripheral surface of the framework (1) is exposed to the outside.
8. The high-speed bidirectional rotary oil seal for the electric vehicle gearbox as recited in claim 4, wherein: the sealing body (2) is made of rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022429696.3U CN213575539U (en) | 2020-10-27 | 2020-10-27 | High-speed bidirectional rotary oil seal for electric vehicle gearbox |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022429696.3U CN213575539U (en) | 2020-10-27 | 2020-10-27 | High-speed bidirectional rotary oil seal for electric vehicle gearbox |
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| Publication Number | Publication Date |
|---|---|
| CN213575539U true CN213575539U (en) | 2021-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022429696.3U Active CN213575539U (en) | 2020-10-27 | 2020-10-27 | High-speed bidirectional rotary oil seal for electric vehicle gearbox |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114033852A (en) * | 2021-10-12 | 2022-02-11 | 莱阳市昌誉密封科技股份有限公司 | Bidirectional high-speed motor oil seal |
-
2020
- 2020-10-27 CN CN202022429696.3U patent/CN213575539U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114033852A (en) * | 2021-10-12 | 2022-02-11 | 莱阳市昌誉密封科技股份有限公司 | Bidirectional high-speed motor oil seal |
| CN114033852B (en) * | 2021-10-12 | 2023-08-29 | 莱阳市昌誉密封科技股份有限公司 | Bidirectional high-speed motor oil seal |
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