CN216200390U - Sealing structure of transmission oil pan - Google Patents
Sealing structure of transmission oil pan Download PDFInfo
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- CN216200390U CN216200390U CN202122463037.6U CN202122463037U CN216200390U CN 216200390 U CN216200390 U CN 216200390U CN 202122463037 U CN202122463037 U CN 202122463037U CN 216200390 U CN216200390 U CN 216200390U
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- oil pan
- rubber strip
- sealing
- sealing rubber
- transmission
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Abstract
A sealing structure of a transmission oil pan comprises a transmission shell, the oil pan and a sealing rubber strip, wherein the oil pan is fixedly installed at the lower end of the transmission shell, the sealing rubber strip is arranged between the lower end of the transmission shell and the upper end of the oil pan, the sealing rubber strip is formed by surrounding the upper end of the oil pan, and the longitudinal section of the sealing rubber strip is W-shaped; the upper end of the oil pan fastens a sealing rubber strip at the lower end of the transmission shell through a hexagon flange bolt and a spacer bush; the mounting position of the upper end of the oil pan and the sealing rubber strip is coated with adhesive; according to the sealing structure, the hexagonal flange bolts are adopted, so that the contact area of the bolts and the oil pan is increased, the crushing risk is reduced, the pre-tightening force attenuation of the bolts is reduced, the spacer sleeve is added, the problem of deformation of the oil pan caused by pre-tightening of the bolts is solved, the contact stress of the sealing lip is more uniform by the sealing rubber strip, and the sealing effect is improved; scribble the viscose between oil pan and joint strip, eliminate the risk that leads to the adhesive tape dislocation in the installation.
Description
Technical Field
The utility model relates to the technical field of transmission sealing structures, in particular to a sealing structure of a transmission oil pan.
Background
The transmission oil pan is a part which is mainly arranged for facilitating the maintenance, the disassembly and the assembly of a gearbox, the inspection, the installation of other parts and the like. The function of the sealing structure of the oil pan is to ensure that lubricating oil in the transmission does not flow out during operation, and ensure that external muddy water, dust and the like do not enter the transmission. If leakage occurs, the lubrication and cooling functions of the transmission are compromised, resulting in transmission damage. If objects such as external muddy water and dust enter the transmission, serious problems such as emulsification of lubricating oil, abnormal abrasion of gear bearings, blockage of oil ducts and the like are easily caused. Therefore, the reliability of the seal structure of the transmission oil pan has an important influence on the reliability of the transmission and the safety of the entire vehicle.
The first sealing structure of the transmission oil pan adopted at present is that the rubber strip structure is shown in the figures (attached figures 1 and 2): the sealing rubber strip (2a) with two sealing lips is placed between the oil pan (3a) and the transmission shell (4a), and then the sealing rubber strip is pressed tightly through the pre-tightening belt elastic cushion bolt assembly (1a), so that the sealing effect is achieved. This structure has the following problems:
1) after the bolts are installed, the oil pan deforms slightly, so that the pretightening force of the bolts is reduced, and the risk of oil leakage exists;
2) the sealing rubber strip is only provided with two lips, so that the sealing effect is poor;
3) poor location in the joint strip installation, the adhesive tape installation appears not in place easily, and partial adhesive tape breaks away from the oil pan, leads to the oil leak.
In the second sealing structure of the transmission oil pan adopted at present, the gluing structure is as shown in the figures (fig. 3 and 4): firstly, coating fluid rubber (2b) on an oil pan (3b), pre-tightening and installing the oil pan on a transmission shell (4b) through a bolt (1b), extruding the rubber to fully cover a binding surface, placing for a period of time, and gradually solidifying the rubber by contacting with moisture in the air to achieve a sealing effect; if the design is poor, the sizing material flows into the gearbox and becomes impurities, which can have adverse effects on the operation of the transmission.
Disclosure of Invention
In order to solve the defects in the prior art, the utility model provides a sealing structure of a transmission oil pan.
The technical scheme of the utility model is as follows: the present invention provides an improved sealing structure of a transmission oil pan (fig. 5 and 6) for solving the above-mentioned problems: the oil pan sealing structure comprises a transmission shell, an oil pan and a sealing rubber strip, wherein the oil pan is fixedly installed at the lower end of the transmission shell, the sealing rubber strip is arranged between the lower end of the transmission shell and the upper end of the oil pan, the sealing rubber strip is formed by surrounding the upper end of the oil pan, and the longitudinal section of the sealing rubber strip is W-shaped; the upper end of the oil pan fastens a sealing rubber strip at the lower end of the transmission shell through a hexagon flange bolt and a spacer bush; and the upper end of the oil pan and the mounting position of the sealing rubber strip are coated with adhesive.
Furthermore, the sealing rubber strip is provided with 3 lips, and the periphery of the sealing rubber strip is provided with a lug structure for mounting the spacer.
Further, the 3 lips include an inner lip, an outer lip and a middle lip, and the heights of the inner lip and the outer lip are greater than the middle lip.
Further, the lug structure is triangular with a round hole in the middle.
Furthermore, the lower end of the sealing rubber strip is provided with an annular arc groove matched with the oil pan.
Furthermore, the upper end of the oil pan extends outwards and is provided with a recessed structure which is inserted with hexagon flange bolts and can be used for placing the spacer bush.
Further, the concave structure comprises an outer bulge and an inner bulge, and the surface of the inner bulge is coated with adhesive.
Further, the spacer bush is a hollow cylinder.
The utility model achieves the following beneficial effects:
1. take bullet pad bolt assembly to change into hexagon flange bolt, increase bolt and oil pan area of contact, reduce the conquassation risk to reduce bolt pretightning force decay.
2. The spacer bush is additionally arranged at the bolt mounting position, and the problem that the oil pan deforms due to bolt pre-tightening of the existing structure is solved.
3. The improved sealing rubber strip is formed by adding a sealing lip (3 lips) on the basis of the structure of the existing product, so that the contact stress of the sealing lip is more uniform, and the sealing effect is improved.
4. Scribble the viscose between oil pan and joint strip, eliminate the risk that leads to the adhesive tape dislocation in the installation.
Drawings
Fig. 1 is a schematic structural diagram of a first conventional product.
Fig. 2 is a partial sectional view of a structural assembly of a first conventional product.
Fig. 3 is a schematic structural diagram of a conventional product two.
Fig. 4 is a partially assembled sectional view of a conventional product two.
Fig. 5 is a schematic view of the entire structure of the oil pan according to the present invention.
FIG. 6 is a partial cross-sectional view of the structural assembly of the oil pan and transmission bottom according to the present invention.
Fig. 7 is a schematic view of the overall structure of the joint strip of the present invention.
Fig. 8 is a top view of the joint strip of the present invention.
FIG. 9 is a cross-sectional view of a bead of the present invention.
In the figure: 1. hexagonal flange bolts; 2. sealing rubber strips; 21. an outer lip; 22. an inner lip; 23. a middle lip; 3. an oil pan; 31. an outer protrusion; 32. an inner bulge; 4. a transmission housing; 5. a spacer sleeve; 6. And (5) gluing.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 5 and 6, the present invention provides an improved sealing structure of a transmission oil pan:
the sealing structure I (adhesive tape structure) of the existing product is improved: the method comprises the following steps: hexagonal flange bolt 1, improved generation joint strip 2, oil pan 3, derailleur casing 4, spacer 5, viscose 6 etc.. The bolt assembly with the elastic pad is changed into a hexagon flange bolt 1, so that the contact area of the bolt and the oil pan is increased, the crushing risk is reduced, and the pre-tightening force attenuation of the bolt is reduced; the method is characterized in that a spacer bush 5 is additionally arranged at the bolt mounting position, so that the problem of deformation of an oil pan caused by bolt pre-tightening of the existing structure is solved, the spacer bush 5 is a hollow cylinder, the height of the cylinder is fixed, the hollow inner diameter is larger than the diameter of a hexagon flange bolt 1, the specific inner diameter is 6-9 mm, the outer diameter is 10-15 mm, the height is 5.5-6.5 mm, and the material is steel; the sealing rubber strip 2 is improved, namely the sealing rubber strip 2 is provided with 3 lips, so that the contact stress of the sealing lips is more uniform, and the sealing effect is improved (figures 7-9).
The method specifically comprises the following steps: the oil pan 3 is fixedly installed at the lower end of the transmission shell 4, a sealing rubber strip 2 is arranged between the lower end of the transmission shell 4 and the upper end of the oil pan 3, the sealing rubber strip 2 is formed by surrounding the upper end of the oil pan, the total width of the rubber strip is B, the total height of the rubber strip is H, B is more than or equal to 10 and less than or equal to 12, H is more than or equal to 10 and less than or equal to 12, the width of a lug position is B1, B1 is more than or equal to 10 and less than or equal to 13, the total width of the rubber strip and a lug is B, B is more than or equal to 20 and less than or equal to 25, the longitudinal section of the sealing rubber strip is W-shaped, 10-15 lug structures (A) are arranged on the periphery of the sealing rubber strip, the lugs are triangular structures and are respectively provided with a hole with a diameter phi d, d is more than or equal to 10 and less than or equal to 15, the thickness of H3 and d is more than or equal to 1.5 and less than or equal to 3, and used for installing the spacer 5, 3 lips of the sealing rubber strip comprise an outer lip 21, an inner lip 22 and a middle lip 23, and are all in a convex arc shape, therefore, the longitudinal section of the utility model is W-shaped, and the heights of the outer lip 21 and the inner lip 22 are larger than that of the middle lip 23, wherein the heights of the inner lip and the outer lip are H1, and H1 is more than or equal to 0.4 and less than or equal to 0.6; the height of the middle lip is H2, H2 is more than or equal to 0.2 and less than or equal to 0.4, the lower end of the sealing rubber strip 2 is provided with an annular arc groove matched with the inner protrusion 31 of the oil pan 3, the radius of the arc groove is R, R is more than or equal to 3 and less than or equal to 5, the thickness of the inner side wall is B1, B1 is more than or equal to 2 and less than or equal to 3, the sealing rubber strip is attached to the oil pan, and the sealing rubber strip can be rubber (NBR), Fluororubber (FKM) or silicone rubber (VMQ).
The upper end of the oil pan 3 tightly fixes the sealing rubber strip 2 at the lower end of the transmission housing 4 through the hexagon flange bolt 1 and the spacer 5, and the mounting positions of the upper end of the oil pan 3 and the sealing rubber strip 2 are coated with adhesive 6, so that the risk of adhesive strip dislocation in the mounting process is eliminated, specifically speaking, the lower end of the transmission housing and the upper end of the oil pan 3 are both provided with threaded holes for mounting the hexagon flange bolt 1, the outward extending position of the upper end of the oil pan 3 is provided with a concave structure for placing the spacer 5, the concave structure comprises an outer bulge 31 and an inner bulge 32, and the surface of the inner bulge 32 is coated with adhesive.
The assembly relationship is as follows (as shown in fig. 5 and 6):
1. a plurality of spacer bushes 5 are sleeved into corresponding mounting holes of the improved sealing rubber strip 2, and are in interference fit.
2. And coating adhesive 6 on the matching part of the oil pan 3 and the improved sealing rubber strip.
3. The assembled modified joint strip 2 and spacer 5 assembly is then placed on the oil pan 3 coated with adhesive 6 so that they adhere well.
4. And finally, positioning and attaching the bonded oil pan 3 and sealing rubber strip 2 assembly and the transmission shell 4, and installing and pre-tightening the plurality of hexagonal flange bolts 1 to finish assembly.
The working principle is as follows: the improved sealing rubber strip is provided with 3 lips, so that the contact stress of the sealing lips is more uniform, and one sealing defense line is added, so that the sealing effect is improved; glue is coated between the oil pan 3 and the sealing rubber strip 2, so that the oil pan is well attached, and the risk of rubber strip dislocation in the installation process is eliminated; the spacer bush 5 is additionally arranged at the bolt mounting position, when the bolt is pre-tightened, the bolt, the oil pan 3, the spacer bush 5 and the transmission shell 4 are in zero-clearance fit, the contact area of the hexagonal flange bolt 1 is large, parts such as the oil pan cannot be deformed, the assembling pre-tightening force of the bolt is kept, and therefore the fit of the sealing rubber strip 2 is guaranteed; the spacer 5 is set to be fixed in height, so that the assembly compression amount of the improved sealing rubber strip is fixed, and the sealing stability is ensured.
Compared with the prior art, the oil pan structure can not only avoid the problem of deformation of the oil pan, but also ensure that the sealing rubber strip is installed in place and maintain the pretightening force of the bolt, thereby practically eliminating the risk of oil leakage. The utility model also optimizes the lip of the sealing rubber strip, so that the sealing contact surface is more attached, and the sealing effect is more excellent. The utility model has strong engineering applicability. Although the utility model is provided for the problem of oil leakage of the oil pan of the transmission, the theoretical result of the utility model has strong application prospect, and can be applied to the analysis and the solution of the sealing problem of other mechanical systems by slight expansion.
In addition, in the description of the present invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "etc. indicate orientations or positional relationships, and are used merely for convenience of description and simplification of description, and the description is mainly made with reference to fig. 1, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
The above-described embodiments of the present invention do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (8)
1. The utility model provides a seal structure of derailleur oil pan, it includes derailleur casing, oil pan and joint strip, its characterized in that: an oil pan is fixedly mounted at the lower end of the transmission shell, a sealing rubber strip is arranged between the lower end of the transmission shell and the upper end of the oil pan, the sealing rubber strip is formed by surrounding the upper end of the oil pan, and the longitudinal section of the sealing rubber strip is W-shaped; the upper end of the oil pan fastens a sealing rubber strip at the lower end of the transmission shell through a hexagon flange bolt and a spacer bush; and the upper end of the oil pan and the mounting position of the sealing rubber strip are coated with adhesive.
2. The sealing structure of a transmission oil pan according to claim 1, characterized in that: the joint strip is provided with 3 lips, and the periphery of the joint strip is provided with a lug structure for mounting the spacer bush.
3. The sealing structure of a transmission oil pan according to claim 2, characterized in that: the 3 lips comprise an inner lip, an outer lip and a middle lip, and the heights of the inner lip and the outer lip are greater than the middle lip.
4. The sealing structure of a transmission oil pan according to claim 2, characterized in that: the lug structure is a triangle with a round hole in the middle.
5. A sealing structure of a transmission oil pan according to claim 1 or 2, characterized in that: and the lower end of the sealing rubber strip is provided with an annular arc groove matched with the oil pan.
6. The sealing structure of a transmission oil pan according to claim 1, characterized in that: the upper end of oil pan extends the department to the outside and is equipped with the sunk structure who alternates hexagon flange bolt and can place the spacer.
7. The sealing structure of a transmission oil pan according to claim 6, characterized in that: the concave structure comprises an outer bulge and an inner bulge, and the surface of the inner bulge is coated with adhesive.
8. The sealing structure of a transmission oil pan according to claim 1 or 6, characterized in that: the spacer bush is in a hollow cylindrical shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122463037.6U CN216200390U (en) | 2021-10-13 | 2021-10-13 | Sealing structure of transmission oil pan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122463037.6U CN216200390U (en) | 2021-10-13 | 2021-10-13 | Sealing structure of transmission oil pan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216200390U true CN216200390U (en) | 2022-04-05 |
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ID=80865126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122463037.6U Active CN216200390U (en) | 2021-10-13 | 2021-10-13 | Sealing structure of transmission oil pan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216200390U (en) |
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2021
- 2021-10-13 CN CN202122463037.6U patent/CN216200390U/en active Active
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