Sealing structure of vehicle-mounted controller of commercial vehicle

Abstract

The invention relates to a sealing structure of a vehicle-mounted controller of a commercial vehicle, belongs to the technical field of vehicle controller sealing, and solves the problem that the sealing structure is easy to lose efficacy under the condition of small size. Comprising a shell, a cover body and a sealing ring, the cover body covers the shell, the cover body comprises a top plate and a flange, the flange is annularly arranged at the bottom of the top plate and inserted into the shell, the sealing ring comprises a vertical edge and a transverse edge which are integrally connected to form an L shape, and the vertical edge is provided with a plurality of protrusions which are in the same direction as the transverse edge and of which the heights are continuously reduced in the direction away from the transverse edge; the top surface of the transverse edge clings to the bottom surface of the top plate, the bottom surface clings to the top surface of the shell, the vertical edge clings to the side surface of the flange, and the bulge abuts against the inner wall of the shell; according to the sealing structure, under the condition that actual production and cost are considered, multiple protection is formed through the sealing ring structure in a specific shape to resist external interference, the sealing requirement under the complex working conditions of vibration, impact and temperature change can be effectively met, durability and reliability are guaranteed, and the requirement for installation precision is relatively low.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle controller sealing, and in particular to a sealing structure of a commercial vehicle onboard controller. Background Art

[0002] In the structure of existing commercial vehicles, various types of sealing rings have been widely used. Various sealing rings use the elastic deformation of materials to achieve sealing. When the sealing ring is subjected to a certain pressure, it will deform elastically, thereby filling the sealing gap and preventing the leakage of fluid or gas.

[0003] In small-sized sealing structures, such as various on-board controllers of commercial vehicles, high sealing requirements are required. However, due to the small size and limited shell thickness, the corresponding sealing ring has a small cross-section and the elastic deformation provided by the sealing material is very limited. The small size condition leads to a higher failure rate of the sealing structure and a shorter durability. Summary of the invention

[0004] Based on the above description, the present invention provides a sealing structure of a commercial vehicle onboard controller to solve the problems raised in the above background technology.

[0005] The technical solution of the present invention to solve the above technical problems is as follows: A sealing structure of a commercial vehicle on-board controller comprises a shell, a cover body and a sealing ring, wherein the cover body is arranged on the shell, the cover body comprises a top plate and a flange, the flange is annularly arranged at the bottom of the top plate and inserted into the shell, the sealing ring comprises a vertical side and a horizontal side integrally connected to form an L shape, the vertical side is provided with a plurality of protrusions which are in the same direction as the horizontal side and whose height decreases continuously in a direction away from the horizontal side, the top surface of the horizontal side is in close contact with the bottom surface of the top plate, the bottom surface is in close contact with the top surface of the shell, the vertical side is in close contact with the side surface of the flange, and the protrusion is in contact with the inner wall of the shell.

[0006] Based on the above technical solution, the present invention can also be improved as follows.

[0007] Furthermore, a step portion is provided at the top of the inner wall of the shell, the thickness of the step portion is smaller than the shell and the outer wall surface is flush with the shell, and at least two groups of protrusions are provided, respectively abutting against the step portion and the inner wall of the shell.

[0008] Furthermore, the protrusions are arranged in three groups, and the protrusion with the highest height is defined as the first protrusion, the second protrusion with the second height is defined as the second protrusion, and the lowest protrusion with the third protrusion. The first protrusion abuts against the inner wall of the step portion, and the second protrusion and the third protrusion abut against the inner wall of the shell in turn.

[0009] Furthermore, each group of protrusions includes a columnar portion and a cap portion, the cap portion is covered on the top of the columnar portion, and the cross-section of the cap portion is semicircular.

[0010] Furthermore, the thickness of the vertical side is defined as t, the height of the first bump is defined as h1, the height of the second bump is defined as h2, the height of the third bump is defined as h3, h1=1t, h2=0.7t, and h3=0.5t.

[0011] Furthermore, a draft angle between the step portion and the shell does not exceed 3 degrees.

[0012] Furthermore, the draft angle between the step portion and the shell is 1.5-3 degrees.

[0013] Furthermore, a groove is provided on the surface of the horizontal edge that is in contact with the top plate.

[0014] Furthermore, a longitudinal extension line of an inner end point of the top surface of the step portion is located within the groove.

[0015] Compared with the prior art, the technical solution of this application has the following beneficial technical effects: Taking production practice and costs into consideration, this sealing structure uses a sealing ring structure of a specific shape to form multiple protections against external interference, occupies a small space, and can effectively meet the sealing requirements under complex working conditions of vibration, impact, and temperature changes, ensuring durability and reliability. The installation accuracy requirements are relatively low, and it is effectively used in small-size pressure difference sealing environments under harsh working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 An exploded schematic diagram of a sealing structure of a commercial vehicle onboard controller provided by an embodiment of the present invention; Figure 2 for Figure 1 Internal cross-section view in assembled state; Figure 3 for Figure 2 A partial enlarged schematic diagram of the middle A area; Figure 4 for Figure 3 Cross-sectional view of the middle sealing ring; In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1. Shell; 2. Cover; 3. Sealing ring; 4. Top plate; 5. Flange; 6. Vertical edge; 7. Horizontal edge; 8. Protrusion; 9. Step portion; 10. First protrusion; 11. Second protrusion; 12. Third protrusion; 13. Column portion; 14. Cap portion; 15. Groove. DETAILED DESCRIPTION

[0017] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0019] It will be appreciated that spatial relationship terms such as "under," "beneath," "below," "under," "above," "above," etc., may be used herein to describe the relationship of an element or feature shown in the figures to other elements or features. It will be appreciated that, in addition to the orientations shown in the figures, spatial relationship terms also include different orientations of the device in use and operation. For example, if the device in the accompanying drawings is flipped, an element or feature described as "under other elements" or "under it" or "under it" will be oriented as being "above" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. In addition, the device may also include additional orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptors used herein are interpreted accordingly.

[0020] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element, or connected to the other element through an intermediate element. The "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0021] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" etc. specify the presence of stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.

[0022] like Figure 1The sealing structure of a commercial vehicle onboard controller shown in the figure comprises a housing 1, a cover 2 and a sealing ring 3, wherein the cover 2 is covered on the housing 1. The cover 2 comprises a top plate 4 and a flange 5 which are connected in one piece, wherein the flange 5 is annularly arranged at the bottom of the top plate 4 and inserted into the housing 1 to form an overlapping portion with the housing 1. When the cover 2 is covered on the housing 1, a small L-shaped gap is formed between the cover 2 and the housing 1.

[0023] like Figure 2-4 As shown, the sealing ring 3 includes a vertical side 6 and a horizontal side 7 integrally connected to form an L shape, and the vertical side 6 is provided with a plurality of protrusions 8, which extend in the same direction as the horizontal side 7 and are located on the same side of the vertical side 6, and the height of the protrusions 8 is continuously reduced along the vertical side 6 in the direction away from the horizontal side 7. The top surface of the horizontal side 7 is in close contact with the bottom surface of the top plate 4, and the bottom surface is in close contact with the top surface of the shell 1, the vertical side 6 is in close contact with the side surface of the flange 5, the protrusions 8 are in contact with the inner wall of the shell 1, and the main body of the sealing ring 3 is in close contact with the inner wall of the cover body 2.

[0024] In order to facilitate the assembly of the cover body 2 and the sealing ring 3 on the shell 1, an integrally connected step portion 9 structure is designed on the top of the inner wall of the shell 1. The step portion 9 structure is used to guide the installation and also provides a part of the insertion space of the sealing ring 3. The thickness of the step portion 9 is smaller than the shell 1 and the outer wall surface is flush with the shell 1.

[0025] At least two groups of protrusions 8 are provided, which respectively abut against the step portion 9 and the inner wall of the housing 1 to achieve a sealing effect in an interference fit manner.

[0026] The protrusion 8 abutting against the step portion 9 plays a major sealing role, and the protrusion 8 abutting against the inner wall of the housing 1 plays an auxiliary and insurance role. Preferably, three groups of protrusions 8 are provided, and the protrusion 8 with the highest height is defined as the first protrusion 10, the second protrusion 11 with the second highest height, and the third protrusion 12 with the lowest height. The first protrusion 10 abuts against the inner wall of the step portion 9, and the second protrusion 11 and the third protrusion 12 abut against the inner wall of the housing 1 in turn. The third protrusion 12 provides additional fault tolerance. The synergistic effect of multiple protrusions 8 can form a multiple protective barrier to effectively prevent external impurities such as dust, mud, water, and oil from entering the interior of the components.

[0027] Each set of protrusions 8 includes a column portion 13 and a cap portion 14 . The cap portion 14 is disposed on the top of the column portion 13 , and the cross section of the cap portion 14 is semicircular.

[0028] Under different working conditions of the car, the temperature of the chassis will change greatly. For example, in hot summer or after long driving, the chassis temperature will rise; in cold winter, the temperature will drop. The temperature change further causes the pressure change of the sealing cavity, which is called the breathing effect. The sealing effect of the sealing ring 3 with multiple protrusions 8 can weaken the breathing effect of the sealing cavity and reduce the sealing failure caused by air pressure changes. It can also offset the dimensional changes of the material due to thermal expansion and contraction to a certain extent, ensure that the sealing structure always fits tightly to the shell 1, avoid the generation of gaps caused by thermal expansion and contraction, and thus ensure the effectiveness of the seal.

[0029] Compared with some complex sealing structures, the multi-protrusion 8 sealing ring 3 has relatively low requirements for installation accuracy. Because the design of multiple protrusions 8 has a certain fault tolerance, even if there are some minor deviations during the installation process, a good sealing effect can be achieved through the adaptive adjustment of the sealing ribs, reducing the difficulty and cost of installation.

[0030] During the driving process of the car, the chassis will also be affected by factors such as vibration and impact. The structure with multiple protrusions 8 can disperse the vibration energy to different protrusions 8, reduce the vibration stress borne by a single protrusion 8, and thus reduce the damage of vibration to the sealing structure. The structure with multiple protrusions 8 can ensure that the sealing structure remains stable in a long-term vibration environment and ensure the normal operation of the parts. The sealing ring 3 with multiple protrusions 8 can reduce the friction and wear between the protrusion 8 and the housing. Since multiple protrusions 8 share the friction stress, the wear degree of each protrusion 8 is relatively reduced.

[0031] At the same time, under vibration conditions, the cover body 2 and the shell 1 often impact and extrude the sealing ring 3. The sealing structure requires the horizontal edge 7 and the vertical edge 6 to fit with the cover body 2 structure respectively, and then seal by interference fit between the protrusion 8 and the shell 1. Ensuring the fit with the cover body 2 structure is the basis of sealing. In order to ensure this docking effect, the present solution provides a groove 15 on the surface of the horizontal edge 7 that fits with the top plate 4.

[0032] The design of the groove 15 plays a role in providing deformation redundancy for the horizontal edge 7. Under the extrusion of the step portion 9, due to the gap of the groove 15, the step portion 9 will push the horizontal edge 7 to the two sides of the groove 15, so that the horizontal edge 7 can ensure the fit with the flange 5. Correspondingly, the horizontal edge 7 drives the vertical edge 6 to fit closely with the flange 5. Preferably, the longitudinal extension line of the inner end point of the top surface of the step portion 9 is located in the groove 15.

[0033] During production, the structure of the step 9 and the housing 1 requires a certain draft angle (draft slope) in consideration of the demoulding process. The draft angle is limited by the process. Under high-precision molds, the minimum draft angle is 1.5 degrees, and the minimum draft angle of ordinary molds is 3 degrees. The smaller the draft angle, the more expensive the equipment and the shorter the mold life. Similarly, increasing the draft angle can reduce costs and increase life.

[0034] The thickness of the vertical side 6 is defined as t, the height of the first protrusion 10 is defined as h1, the height of the second protrusion 11 is defined as h2, and the height of the third protrusion 12 is defined as h3. The height of the protrusion 8 is calculated from the side wall of the vertical side 6 to the top of the cap body 14.

[0035] Embodiment 1 Design h1=0.7*t, h2=0.5*t, h3=0.3*t, draft angle 1.5 degrees, assemble the structure and put it into a water-immersed sealing tester, the upper limit of the sealing pressure is measured to be 40kpa.

[0036] Embodiment 2 Design hl=0.7*t, h2=0.5*t, h3=0.3*t, draft angle 3 degrees, assemble the structure and put it into a water-immersed sealing tester, the upper limit of the sealing pressure is measured to be 20kpa.

[0037] Embodiment 3 Design hl=1.0*t, h2=0.7*t, h3=0.5*t, draft angle 1.5 degrees, put the structure into a water-immersed seal tester after assembly, and the upper limit of the seal pressure is 110kpa, which has a significant improvement in seal pressure resistance.

[0038] Embodiment 4 Design hl=1.0*t, h2=0.7*t, h3=0.5*t, draft angle 3 degrees, put the structure into a water-immersed seal tester after assembly, and the upper limit of the seal pressure is 80kpa, which has a significant improvement in seal pressure resistance.

[0039] The larger the draft angle between the step portion 9 and the housing 1, the worse the sealing performance. In the industry standard, the low-pressure seal must meet 48 kPa. After calculating the production cost, the draft angle is preferably 1.5-3 degrees.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A sealing structure of a commercial vehicle onboard controller, characterized in that: It includes a shell, a cover body and a sealing ring, the cover body is arranged on the shell, the cover body includes a top plate and a flange, the flange is annularly arranged at the bottom of the top plate and inserted into the shell, the sealing ring includes a vertical side and a horizontal side integrally connected to form an L shape, the vertical side is provided with a plurality of protrusions which are in the same direction as the horizontal side and whose height decreases continuously as they move away from the horizontal side, the top surface of the horizontal side is in close contact with the bottom surface of the top plate, the bottom surface is in contact with the top surface of the shell, the vertical side is in close contact with the side surface of the flange, and the protrusion is in contact with the inner wall of the shell.

2. The sealing structure of a commercial vehicle onboard controller according to claim 1, characterized in that: A step portion is provided at the top of the inner wall of the shell, the thickness of the step portion is smaller than the shell and the outer wall surface is flush with the shell, and at least two groups of protrusions are provided, respectively abutting against the step portion and the inner wall of the shell.

3. The sealing structure of a commercial vehicle onboard controller according to claim 2, characterized in that: The protrusions are arranged in three groups, and the protrusion with the highest height is defined as the first protrusion, the second protrusion with the second height is defined as the second protrusion, and the lowest protrusion with the third protrusion. The first protrusion abuts against the inner wall of the step portion, and the second protrusion and the third protrusion abut against the inner wall of the shell in turn.

4. The sealing structure of a commercial vehicle onboard controller according to claim 3, characterized in that: Each group of protrusions includes a column part and a cap part. The cap part is covered on the top of the column part, and the cross section of the cap part is semicircular.

5. The sealing structure of a commercial vehicle onboard controller according to claim 4, characterized in that: The thickness of the vertical side is defined as t, the height of the first bump is defined as h1, the height of the second bump is defined as h2, the height of the third bump is defined as h3, h1=1t, h2=0.7t, and h3=0.5t.

6. The sealing structure of a commercial vehicle onboard controller according to claim 2, characterized in that: The draft angle between the step portion and the shell does not exceed 3 degrees.

7. The sealing structure of a commercial vehicle onboard controller according to claim 6, characterized in that: The draft angle between the step portion and the shell is 1.5-3 degrees.

8. The sealing structure of a commercial vehicle onboard controller according to claim 2, characterized in that: A groove is provided on the surface of the horizontal edge that is in contact with the top plate.

9. The sealing structure of a commercial vehicle onboard controller according to claim 8, characterized in that: A longitudinal extension line of an inner end point of the top surface of the step portion is located in the groove.

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