Engine crankshaft oil seal structure

Abstract

The utility model relates to the technical field of engine part maintenance, in particular to an engine crankshaft oil seal structure which comprises an installation cover and a sealing lantern ring, sealing assemblies are symmetrically arranged on the two sides of the end of the sealing lantern ring, and each sealing assembly comprises a first elastic sealing ring and a second elastic sealing ring. A first adjusting ring groove is formed in the inner side of the end of the sealing lantern ring, a second adjusting ring groove is formed in the outer side of the end of the sealing lantern ring, a first limiting piece is arranged at the end, close to the mounting cover, of the first elastic sealing ring, a second limiting piece is arranged at the end, close to the mounting cover, of the second elastic sealing ring, and a plurality of positioning holes are evenly and annularly formed in the peripheral side of the mounting cover. And a dismounting auxiliary block used for dismounting and separating the sealing lantern ring from the mounting groove is arranged on the end face of the side, away from the sealing lantern ring, of the mounting cover. The problems that a traditional engine crankshaft oil seal structure is complex in assembling technology, high in mounting cost and inconvenient to dismount, mount and replace are solved.

Description

Technical Field

[0001] This application relates to the field of engine component maintenance technology, and specifically discloses an engine crankshaft oil seal structure. Background Technology

[0002] An engine consists of an engine housing and a high-speed rotating crankshaft. The crankshaft is pivotally connected to the engine housing. The engine housing consists of an engine crankcase and an engine crankshaft rear oil seal structure covering the engine crankcase. As the most important component in a piston engine, the crankshaft is used to convert the reciprocating motion of the piston into rotational motion.

[0003] The existing engine crankshaft rear oil seal structure, as one of the engine oil seals, is usually installed in the mounting slot of the engine crankcase and protected by the oil seal. However, the assembly process of the crankshaft rear oil seal structure is relatively complicated, resulting in high installation costs. Moreover, its disassembly and assembly are cumbersome, making it inconvenient for the maintenance and replacement of the engine crankshaft. Therefore, in view of this, the inventor provides an engine crankshaft oil seal structure to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to solve the problems of complex assembly process, high installation cost, and inconvenience in disassembly and replacement of traditional engine crankshaft oil seal structures.

[0005] To achieve the above objectives, the basic solution of this utility model provides an engine crankshaft oil seal structure, including a mounting cover detachably mounted to the engine housing and a sealing ring disposed on one side of the mounting cover for detachable mounting to a mounting groove. The sealing ring has symmetrically arranged sealing components on both sides of its end for sealing the mounting groove. Each sealing component includes a first elastic sealing ring disposed on the inner side of the end of the sealing ring for sealing the inner ring sidewall of the mounting groove, and a second elastic sealing ring disposed on the outer side of the end of the sealing ring for sealing the outer ring sidewall of the mounting groove. The inner side of the end of the sealing ring has a first adjusting ring groove for accommodating the first elastic sealing ring, and the outer side of the end of the sealing ring has a second adjusting ring groove for accommodating the second elastic sealing ring. The end of the first elastic sealing ring near the mounting cover has a first limiting member, and the end of the second elastic sealing ring near the mounting cover has a second limiting member. The mounting cover has a plurality of positioning holes evenly arranged around its periphery for positioning the sealing ring and the mounting groove. The end face of the mounting cover away from the sealing ring has a disassembly auxiliary block for separating the sealing ring from the mounting groove.

[0006] The principle and effect of this basic scheme are as follows:

[0007] 1. Compared with the prior art, this utility model, by setting a first elastic sealing ring and a second elastic sealing ring, facilitates the fitting of the sealing sleeve with the inner wall of the mounting groove to achieve a better oil sealing effect and prevent oil leakage. The integrated installation of the mounting cover and the sealing sleeve, as well as the setting of the disassembly auxiliary block, makes the overall structure easier to disassemble. The setting of positioning holes facilitates the positioning and installation of the mounting cover and the crankshaft housing. The crankshaft oil seal structure can be installed without the need for special crankshaft oil seal installation tools, solving the problems of complex assembly process, high installation cost, and inconvenience of disassembly and replacement of traditional engine crankshaft oil seal structures.

[0008] Furthermore, the first limiting member includes a first limiting ring disposed at one end of the first elastic sealing ring near the mounting cover and a first adjusting ring cavity communicating with the first adjusting ring groove and used to accommodate the first limiting ring. By providing the first limiting ring and the first adjusting ring cavity, the first elastic sealing ring can be automatically adjusted at any time during the compression and recovery process of disassembly and assembly, resulting in a better sealing effect on the inner side of the mounting groove.

[0009] Furthermore, the second limiting member includes a second limiting ring disposed at one end of the second elastic sealing ring near the mounting cover, and a second adjusting ring cavity communicating with the second adjusting ring groove and used to accommodate the second limiting ring. By providing the second limiting ring and the second adjusting ring cavity, the second elastic sealing ring can be automatically adjusted at any time during the compression and recovery process of disassembly and assembly, resulting in a better sealing effect on the outside of the mounting groove.

[0010] Furthermore, the disassembly auxiliary block includes several fixing blocks evenly distributed on the end face of the mounting cover away from the sealing ring, and a through groove provided on the side of the fixing blocks to facilitate the application of force to lift and disassemble the mounting cover. By providing the fixing blocks and the through groove, it is convenient to apply force to the disassembly auxiliary block to achieve the disassembly of the mounting cover and the sealing ring.

[0011] Furthermore, the connection end between the sealing collar and the mounting cover is provided with a sealing chamfered ring. By providing a sealing chamfered ring, double oil sealing protection is provided for the mounting groove. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This paper shows a front view of an engine crankshaft oil seal structure according to an embodiment of this application;

[0014] Figure 2A top view of an engine crankshaft oil seal structure according to an embodiment of this application is shown;

[0015] Figure 3 The embodiments of this application are shown. Figure 2 Enlarged view of the structure of section A in the middle. Detailed Implementation

[0016] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0017] The reference numerals in the accompanying drawings include: mounting cover 1, sealing collar 2, first elastic sealing ring 3, second elastic sealing ring 4, first adjusting ring groove 5, second adjusting ring groove 6, positioning hole 7, disassembly auxiliary block 8, first limiting ring 9, first adjusting ring cavity 10, second limiting ring 11, second adjusting ring cavity 12, fixing block 13, through groove 14, and sealing chamfer ring 15.

[0018] An engine crankshaft oil seal structure, implementing, for example Figure 1 As shown: including a mounting cover 1 that can be detachably installed with the engine housing and as shown in the figure. Figure 2 The sealing collar 2 shown is located on the front side of the mounting cover 1 and is detachably installed with the mounting groove. The ends of the sealing collar 2 are symmetrically provided with sealing components for sealing the mounting groove, such as... Figure 3 As shown, the sealing assembly includes a first elastic sealing ring 3 disposed on the inner side of the end of the sealing collar 2 for sealing the inner ring sidewall of the mounting groove, and a second elastic sealing ring 4 disposed on the outer side of the end of the sealing collar 2 for sealing the outer ring sidewall of the mounting groove. The inner side of the end of the sealing collar 2 is provided with a first adjusting ring groove 5 for accommodating the first elastic sealing ring 3, and the outer side of the end of the sealing collar 2 is provided with a second adjusting ring groove 6 for accommodating the second elastic sealing ring 4. The first elastic sealing ring 3 has a first limiting member at one end near the mounting cover 1, and the second elastic sealing ring 4 has a second limiting member at one end near the mounting cover 1. Figure 1 As shown, the mounting cover 1 has eight positioning holes 7 evenly arranged around its periphery for positioning the sealing sleeve 2 and the mounting groove. The end face of the mounting cover 1 away from the sealing sleeve 2 is provided with a disassembly auxiliary block 8 for disassembling and separating the sealing sleeve 2 from the mounting groove.

[0019] Among them, such as Figure 3 As shown, the first limiting member includes a first limiting ring 9 disposed at one end of the first elastic sealing ring 3 near the mounting cover 1 and a first adjusting ring cavity 10 communicating with the first adjusting ring groove 5 and used to accommodate the first limiting ring 9.

[0020] Among them, such as Figure 3As shown, the second limiting member includes a second limiting ring 11 disposed at one end of the second elastic sealing ring 4 near the mounting cover 1 and a second adjusting ring cavity 12 communicating with the second adjusting ring groove 6 and used to accommodate the second limiting ring 11.

[0021] Among them, such as Figure 2 As shown, the disassembly auxiliary block 8 includes four fixing blocks 13 evenly distributed on the end face of the mounting cover 1 away from the sealing collar 2, and through grooves 14 provided on the side of each fixing block 13 to facilitate the application of force to lift and disassemble the mounting cover 1.

[0022] Among them, such as Figure 2 As shown, the sealing collar 2 and the mounting cover 1 are connected by a sealing chamfered ring 15.

[0023] In the specific implementation of this utility model, when it is necessary to install the mounting cover 1 and the sealing ring 2 into the mounting groove, simply align the positioning hole 7 with the position of the engine housing, and then slowly push the sealing ring 2 into the mounting groove. During the installation process of the sealing ring 2 into the mounting groove, the first elastic sealing ring 3 is pressed into the first adjusting ring groove 5 by the squeezing of the inner ring side wall of the mounting groove, and the two exert a mutual squeezing effect. The second elastic sealing ring 4 is pressed into the second adjusting ring groove 6 by the squeezing of the outer ring side wall of the mounting groove, and the two exert a mutual squeezing effect. The first limiting ring 9 and the second limiting ring 11 are also pressed into the first adjusting ring cavity 10 and the second adjusting ring cavity 12 respectively along with the first elastic sealing ring 3 and the second elastic sealing ring 4, until the front end face of the mounting cover 1 is in contact with the groove opening of the mounting groove, that is, the sealing ring 2 is completely installed into the mounting groove, thus completing the installation of the crankshaft oil seal structure. During disassembly, apply force evenly to the disassembly auxiliary block 8 and slowly remove the sealing ring 2 from the mounting groove to complete the disassembly of the crankshaft oil seal structure.

[0024] Compared with the prior art, this utility model, by setting a first elastic sealing ring 3 and a second elastic sealing ring 4, makes it easier for the sealing sleeve 2 to fit with the inner wall of the mounting groove, thereby achieving a better oil sealing effect and preventing oil leakage. The integrated installation of the mounting cover 1 and the sealing sleeve 2, as well as the setting of the disassembly auxiliary block 8, makes the overall structure easier to disassemble. The setting of the positioning hole 7 facilitates the positioning and installation of the mounting cover 1 and the crankshaft housing. The crankshaft oil seal structure can be installed without the need for special crankshaft oil seal installation tools, solving the problems of complex assembly process, high installation cost, and inconvenience of disassembly and replacement of traditional engine crankshaft oil seal structures.

[0025] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An engine crankshaft oil seal structure, characterized in that: The device includes a mounting cover detachably mounted to the engine housing and a sealing ring located on one side of the mounting cover for detachable mounting to a mounting groove. The sealing ring has symmetrically arranged sealing assemblies on both sides of its end for sealing the mounting groove. Each sealing assembly includes a first elastic sealing ring located on the inner side of the sealing ring's end for sealing the inner sidewall of the mounting groove, and a second elastic sealing ring located on the outer side of the sealing ring's end for sealing the outer sidewall of the mounting groove. The inner side of the sealing ring's end has a first adjusting ring groove for accommodating the first elastic sealing ring, and the outer side of the sealing ring's end has a second adjusting ring groove for accommodating the second elastic sealing ring. The first elastic sealing ring has a first limiting member at its end near the mounting cover, and the second elastic sealing ring has a second limiting member at its end near the mounting cover. The mounting cover has a plurality of positioning holes evenly distributed around its periphery for positioning the sealing ring and the mounting groove. The end face of the mounting cover away from the sealing ring has a disassembly auxiliary block for separating the sealing ring from the mounting groove.

2. The engine crankshaft oil seal structure according to claim 1, characterized in that, The first limiting member includes a first limiting ring disposed at one end of the first elastic sealing ring near the mounting cover and a first adjusting ring cavity communicating with the first adjusting ring groove and used to accommodate the first limiting ring.

3. The engine crankshaft oil seal structure according to claim 2, characterized in that, The second limiting member includes a second limiting ring disposed at one end of the second elastic sealing ring near the mounting cover and a second adjusting ring cavity communicating with the second adjusting ring groove and used to accommodate the second limiting ring.

4. The engine crankshaft oil seal structure according to claim 3, characterized in that, The disassembly auxiliary block includes several fixing blocks evenly distributed on the end face of the mounting cover away from the sealing collar, and a through groove provided on the side of the fixing blocks to facilitate the application of force to lift and disassemble the mounting cover.

5. The engine crankshaft oil seal structure according to claim 4, characterized in that, The connection end between the sealing collar and the mounting cover is provided with a sealing chamfer ring.

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