Sealing structure for oil dipstick sleeve of engine
The multi-stage sealing structure design solves the problem of poor sealing performance of the engine dipstick sleeve, achieving a stable sealing effect, improving assembly stability, reducing wear, and ensuring the normal operation of the engine lubrication system.
Patent Information
- Application Number
- CN202520508918.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-21
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-03-21
AI Technical Summary
The existing engine dipstick sleeve has poor sealing performance, which leads to oil leakage, affects engine lubrication performance, and is prone to wear during assembly and use.
It adopts a multi-stage sealing structure, including sleeve joint, pressure plate bracket and rubber rings of different outer diameters, and achieves a stable seal through bolt connection. The multi-stage sealing effect is formed by the cooperation of multiple rubber rings with embedded ring grooves.
This improves the assembly stability and sealing performance of the dipstick sleeve, reduces wear, ensures the oil's sealing performance, and avoids oil waste and lubrication system malfunctions.
Smart Images
Figure CN223923116U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of engine manufacturing technology, specifically, to a sealing structure for an engine dipstick sleeve. Background Technology
[0002] The engine oil dipstick sleeve is an important component of the automotive engine lubrication system. It protects the dipstick and ensures its proper insertion into the engine oil pan. This effectively prevents damage to the dipstick during use and extends its lifespan. A well-designed sleeve prevents the dipstick from being inserted too deeply or too shallowly, thus avoiding inaccurate oil level checks. During engine operation, the dipstick sleeve reduces oil splashing along the sleeve walls, preventing oil waste and contamination. Poor sealing of the engine oil dipstick sleeve can cause oil leakage and even lead to poor engine lubrication, affecting its performance.
[0003] It is evident that sealing performance and sealing stability are crucial attributes of the dipstick sleeve assembly. As the dipstick is an essential tool for checking engine oil levels, its installation position needs to be adjusted according to the overall vehicle layout; therefore, the structure and shape of the dipstick sleeve are of paramount importance. Market failure rate feedback indicates that customer complaints frequently arise due to oil leakage at the interface between the dipstick sleeve seal and the oil pan. Ensuring the sealing performance of the dipstick sleeve during assembly, testing, and after-sales service is a key element in designing the dipstick sleeve's shape and sealing structure. Utility Model Content
[0004] The purpose of this utility model is to provide a sealing structure for the engine dipstick sleeve to solve the problems mentioned in the background art.
[0005] To solve the above problems, the present invention adopts the following technical means:
[0006] An engine dipstick sleeve sealing structure includes a dipstick sleeve and a mounting portion constructed on the surface of the oil pan.
[0007] The dipstick sleeve includes a sleeve connector that is inserted into the mounting part. A pressure plate bracket is installed at one end of the sleeve connector that extends out of the mounting part. A dipstick tube is installed at the end of the pressure plate bracket that is opposite to the sleeve connector. The dipstick tube is connected to the sleeve connector.
[0008] The mounting portion includes an insertion channel constructed on the surface of the oil pan and an embedding annular groove constructed on the surface of the oil pan and coaxially disposed with the insertion channel;
[0009] The sleeve connector has a first rubber ring and a second rubber ring with different outer diameters on the side wall of the insertion channel. The pressure plate bracket has a third rubber ring that is coaxially arranged with the sleeve connector on the side facing the oil pan. The third rubber ring is inserted into the embedded annular groove. The pressure plate bracket is detachably connected to the oil pan.
[0010] Preferably, the first rubber ring is closer to the end of the sleeve joint that extends into the insertion channel than the second rubber ring, the outer diameter of the first rubber ring is smaller than the outer diameter of the second rubber ring, and the outer wall of the first rubber ring is in sliding contact with the inner wall of the insertion channel.
[0011] Furthermore, the pressure plate bracket is detachably connected to the outer wall of the oil pan via bolts.
[0012] Furthermore, the outer diameter of the third rubber ring is not less than the outer diameter of the embedded annular groove, and the inner diameter of the third rubber ring is greater than the inner diameter of the embedded annular groove.
[0013] Furthermore, the inner ring wall of the third rubber ring is constructed with a plurality of abutting blocks around its axis, and the abutting blocks abut against the inner ring wall of the embedded ring groove.
[0014] Furthermore, the side of the abutment block facing the embedded annular groove is constructed as an arc surface structure.
[0015] This utility model has the following beneficial effects during use:
[0016] Assembly is completed by inserting the sleeve fitting into the insertion channel and then tightly connecting the pressure plate bracket to the oil pan surface with bolts. Simultaneously, using a first and second rubber ring of different outer diameters, the first rubber ring slides against the inner wall of the insertion channel during assembly, preventing wear between the outer wall of the sleeve fitting and the insertion channel. Furthermore, after the sleeve fitting is assembled, the second rubber ring enters the insertion channel, achieving a stable seal through tight contact with the inner wall. The first rubber ring also provides a primary seal. The use of the first and second rubber rings not only improves the stability of the sleeve fitting during installation but also creates a two-stage seal, enhancing the sealing performance between the sleeve fitting and the insertion channel. After the pressure plate bracket is tightly assembled with the oil pan, a third rubber ring forms a third-stage seal. The assembly structure of the third rubber ring and its embedded annular groove ensures a good seal while reducing wear on the third rubber ring during the final assembly stage when the pressure plate bracket is rotated to further insert the second rubber ring into the insertion channel. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the assembly structure of the dipstick sleeve and the oil pan of this utility model.
[0018] Figure 2 This is a schematic diagram of the oil dipstick sleeve of this utility model.
[0019] Figure 3 for Figure 1 A side view structural diagram.
[0020] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure of AA.
[0021] Figure 5 for Figure 4 A magnified schematic diagram of the structure at point A in the middle.
[0022] Figure 6 for Figure 2 A side view structural diagram.
[0023] Figure 7 for Figure 6 A magnified schematic diagram of the structure at point B in the middle.
[0024] Among them, 1-oil pan, 2-sleeve connector, 3-pressure plate bracket, 4-oil dipstick tube, 5-installation channel, 6-embedded annular groove, 7-first rubber ring, 8-second rubber ring, 9-third rubber ring, 10-abutment block. Detailed Implementation
[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.
[0026] Therefore, the following detailed description of the embodiments of the present 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 present invention without inventive effort are within the scope of protection of the present invention.
[0027] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.
[0028] 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.
[0029] In the description of this utility model, 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 utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0030] In the description of this utility model, 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 utility model based on the specific circumstances.
[0031] Please refer to Figures 1 to 7 As shown, an engine dipstick sleeve sealing structure includes a dipstick sleeve and a mounting portion constructed on the surface of the oil pan 1.
[0032] The dipstick sleeve includes a sleeve connector 2 that is inserted into the mounting part. A pressure plate bracket 3 is installed at one end of the sleeve connector 2 that extends out of the mounting part. A dipstick tube 4 is installed at the end of the pressure plate bracket 3 that is opposite to the sleeve connector 2. The dipstick tube 4 is connected to the sleeve connector 2.
[0033] The mounting part includes an insertion channel 5 constructed on the surface of the oil pan 1 and an embedding annular groove 6 constructed on the surface of the oil pan 1 and coaxially disposed with the insertion channel 5;
[0034] The sleeve connector 2 is fitted into the side wall of the insertion channel 5, which has a first rubber ring 7 and a second rubber ring 8 with different outer diameters. The pressure plate bracket 3 is fitted with a third rubber ring 9 that is coaxially arranged with the sleeve connector 2 on the side facing the oil pan 1. The third rubber ring 9 is fitted into the embedded ring groove 6. The pressure plate bracket 3 is detachably connected to the oil pan 1.
[0035] Thus, assembly is completed by inserting the sleeve connector 2 into the insertion channel 5 and then tightly connecting the pressure plate bracket 3 to the surface of the oil pan 1 with bolts. Simultaneously, the use of a first rubber ring 7 and a second rubber ring 8 with different outer diameters serves two purposes: firstly, the sliding contact between the first rubber ring 7 and the inner wall of the insertion channel 5 during assembly prevents wear between the outer wall of the sleeve connector 2 and the insertion channel 5; secondly, after the sleeve connector 2 is assembled, the second rubber ring 8 enters the insertion channel 5, achieving a stable seal through its tight contact with the inner wall of the insertion channel 5. At the same time, the first rubber ring 7 also provides a primary seal. The use of the first rubber ring 7 and the second rubber ring 8 not only improves the stability of the sleeve connector 2 during installation but also creates a two-stage seal, enhancing the sealing performance between the sleeve connector 2 and the insertion channel 5. After the pressure plate bracket 3 and the oil pan 1 are tightly assembled, the third rubber ring 9 can form a third-level seal. Moreover, through the assembly structure of the third rubber ring 9 and the embedded ring groove 6, a good sealing state is ensured, and the wear of the third rubber ring 9 is reduced when the second rubber ring 8 is better installed into the installation channel 5 by rotating the pressure plate bracket 3 in the final assembly state.
[0036] More specifically, the first rubber ring 7 is closer to the end of the sleeve connector 2 that extends into the insertion channel 5 than the second rubber ring 8, the outer diameter of the first rubber ring 7 is smaller than the outer diameter of the second rubber ring 8, and the outer wall of the first rubber ring 7 is in sliding contact with the inner wall of the insertion channel 5.
[0037] In this way, since the outer diameter of the first rubber ring 7 is smaller than that of the second rubber ring 8, the sleeve connector 2 can be installed more easily when the first rubber ring 7 enters the insertion channel 5, compared to the state when the second rubber ring 8 enters the insertion channel 5. Thus, the contact between the first rubber ring 7 and the inner wall of the insertion channel 5 is used to avoid the sleeve connector 2 from rubbing against the inner wall of the insertion channel 5.
[0038] More specifically, the pressure plate bracket 3 is detachably connected to the outer wall of the oil pan 1 by bolts.
[0039] As for the third rubber ring 9, the outer diameter of the third rubber ring 9 is not less than the outer diameter of the embedded annular groove 6, and the inner diameter of the third rubber ring 9 is greater than the inner diameter of the embedded annular groove 6.
[0040] Furthermore, the inner ring wall of the third rubber ring 9 is constructed with a plurality of abutting blocks 10 around its axis, and the abutting blocks 10 abut against the inner ring wall of the embedded ring groove 6.
[0041] Meanwhile, the side of the abutment block 10 facing the embedded annular groove 6 is constructed as an arc surface.
[0042] In this way, by utilizing the abutment block 10 of the inner ring of the third rubber ring 9, not only can the abutment block 10 abut against the inner ring wall of the embedded ring groove 6, ensuring the installation stability and sealing of the third rubber ring 9, but the contact area between the abutment block 10 and the inner ring wall of the embedded ring groove 6 is smaller than the contact area after the inner ring of the third rubber ring 9 is directly and completely attached to the embedded ring groove 6. This allows the third rubber ring 9 to slide easily within the embedded ring groove 6 during the rotation of the pressure plate bracket 3, and also protects the inner ring of the third rubber ring 9, preventing excessive wear on the inner ring of the third rubber ring 9.
[0043] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A sealing structure for an engine dipstick sleeve, characterized in that, Includes a dipstick sleeve and a mounting part constructed on the surface of the oil pan (1); The dipstick sleeve includes a sleeve connector (2) inserted into the mounting part. A pressure plate bracket (3) is installed at one end of the sleeve connector (2) extending out of the mounting part. A dipstick tube (4) is installed at the end of the pressure plate bracket (3) opposite to the sleeve connector (2). The dipstick tube (4) is connected to the sleeve connector (2). The mounting part includes an insertion channel (5) constructed on the surface of the oil pan (1) and an embedding annular groove (6) constructed on the surface of the oil pan (1) and coaxially disposed with the insertion channel (5). The sleeve connector (2) is fitted into the side wall of the insertion channel (5) with a first rubber ring (7) and a second rubber ring (8) with different outer diameters. The pressure plate bracket (3) is fitted with a third rubber ring (9) coaxially arranged with the sleeve connector (2) on the side facing the oil pan (1). The third rubber ring (9) is fitted into the embedded ring groove (6). The pressure plate bracket (3) is detachably connected to the oil pan (1).
2. The engine dipstick sleeve sealing structure according to claim 1, characterized in that, The first rubber ring (7) is closer to the end of the sleeve joint (2) that extends into the insertion channel (5) than the second rubber ring (8). The outer diameter of the first rubber ring (7) is smaller than the outer diameter of the second rubber ring (8). The outer wall of the first rubber ring (7) slides in contact with the inner wall of the insertion channel (5).
3. The engine dipstick sleeve sealing structure according to claim 1, characterized in that, The pressure plate bracket (3) is connected to the outer wall of the oil pan (1) by bolts.
4. The engine dipstick sleeve sealing structure according to claim 1, characterized in that, The outer diameter of the third rubber ring (9) is not less than the outer diameter of the embedded ring groove (6), and the inner diameter of the third rubber ring (9) is greater than the inner diameter of the embedded ring groove (6).
5. The engine dipstick sleeve sealing structure according to claim 4, characterized in that, The inner ring wall of the third rubber ring (9) is constructed with a plurality of abutting blocks (10) around its axis, and the abutting blocks (10) abut against the inner ring wall of the embedded ring groove (6).
6. The engine dipstick sleeve sealing structure according to claim 5, characterized in that, The side of the abutment block (10) facing the embedded annular groove (6) is constructed as an arc surface.