CN108571579A - A kind of preventing oil seal abjection end cover structure - Google Patents
A kind of preventing oil seal abjection end cover structure Download PDFInfo
- Publication number
- CN108571579A CN108571579A CN201810410646.5A CN201810410646A CN108571579A CN 108571579 A CN108571579 A CN 108571579A CN 201810410646 A CN201810410646 A CN 201810410646A CN 108571579 A CN108571579 A CN 108571579A
- Authority
- CN
- China
- Prior art keywords
- wall
- hole
- end cap
- oil sealing
- groove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/029—Gearboxes; Mounting gearing therein characterised by means for sealing the gearboxes, e.g. to improve airtightness
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/031—Gearboxes; Mounting gearing therein characterised by covers or lids for gearboxes
Abstract
The invention discloses a kind of preventing oil seals to deviate from end cap, and oil sealing is mounted in the upper through-hole of end cap, and the contact surface of oil sealing and upper through-hole side wall is uneven, increases the frictional force of oil sealing and upper through-hole side wall；Groove is set on the side wall of upper through-hole, when oil sealing, which is under pressure, to be detached from outside end cap, the protrusion of oil sealing side is blocked by groove, increases the resistance for preventing oil sealing abjection end cap.After the structure of end cap is modified by the present invention, oil sealing abjection is effectively prevented, product quality is improved.
Description
【Technical field】
The present invention relates to a kind of gearbox cover, especially a kind of preventing oil seal deviates from end cover structure.
【Background technology】
Obturator of the oil sealing as high technology content, is widely used in automobile engine, gearbox.In gearbox
The complexity of oil sealing at ring flange due to application environment, it is possible to deviate from from ring flange, the lubricating oil in speed changer is caused to ooze
Leakage is likely to cause speed changer burn if do not found in time in car running process.
Therefore it need to consider that Multiple Failure Modes, wherein oil sealing abjection are used as crucial point of taking precautions against need to be first in design when stem seal design
Phase carries out considering check.Oil seal pressing is on oil sealing end cap, when the pressure that oil sealing itself is subject to exceeds oil sealing extrusion pressure, meeting
There is the phenomenon that oil sealing is deviate from from end cap or deviates installation site, improve oil sealing extrusion pressure, oil sealing indentation can be increased simultaneously
Power influences oil seal pressing.
Deviate from for oil sealing, common method of the same trade at present has：(1) increase oil sealing and end cap interference volume；(2) oil is improved
Sealing-in contacting surface roughness increases friction coefficient；(3) lubricating oil is reduced or do not used when being pressed, and improves contact surface frictional force.More than
Scheme all can accordingly increase oil sealing pressing-in force while increasing oil sealing extrusion pressure, cause assembly difficult to a certain extent.Therefore,
A kind of preventing oil seal abjection scheme need to be designed under the premise of reducing other influences factor.
【Invention content】
It is an object of the invention to overcome the above-mentioned prior art, a kind of preventing oil seal abjection end cover structure is provided, is led to
The end cover structure for changing charge of oil envelope is crossed, does not change oil sealing assembly technology, on oil sealing performance without influence, cost increases seldom.
In order to achieve the above objectives, the present invention is achieved by the following scheme：
A kind of preventing oil seal abjection end cap, including end cap, end cap offer upper through-hole, upper through-hole and end cap along its axial direction
Coaxially, the groove coaxial with end cap is offered on the side wall of upper through-hole；The side wall of upper through-hole and the oil sealing contact of sealing,
The contact surface of oil sealing and upper through-hole side wall is uneven.
Further improvement of the present invention is：
The side wall intersection of the lower edge and upper through-hole of the trench interiors side.
Upper surface and the intersection of upper through-hole side wall are right angle in the groove.
The side wall of upper through-hole is divided into downwards three parts by the top of upper through-hole：First inner wall, the second inner wall and
Third inner wall, the circle that the edge line of each inner wall surrounds are each perpendicular to the axis of upper through-hole；First inner wall and the second inner wall
Connect, groove is between the second inner wall and third inner wall；The angle of first inner wall and upper through-hole axis is β, 0 ° of ＜ β ＜
90°；The protrusion touched with oil sealing bottom connection is provided at the lower edge of third inner wall.
The height of second inner wall and the height of third inner wall are equal.
First inner wall and the second inner wall intersection, trench interiors side and third inner wall intersection and third inner wall and convex
It plays intersection and carries out rounded corner processing.
The radius for pouring out fillet is 0.2~0.5mm.
The height of upper through-hole is H, and upper surface and upper through-hole side wall intersection are to groove inner side edge lower edge in groove
Vertical range is the vertical height h of groove, h/H≤0.2.
Compared with prior art, the invention has the advantages that：
The invention discloses a kind of preventing oil seals to deviate from end cap, and oil sealing is mounted in the upper through-hole of end cap, oil sealing and top
The contact surface of through-hole side wall is uneven, increases the frictional force of oil sealing and upper through-hole side wall；It is arranged on the side wall of upper through-hole
Groove, when oil sealing, which is under pressure, to be detached from outside end cap, the protrusion of oil sealing side is blocked by groove, and increase prevents oil sealing from deviating from end
The resistance of lid.After the structure of end cap is modified by the present invention, oil sealing abjection is effectively prevented, product quality is improved.
Further, the present invention by the setting of the top edge of groove medial surface in cover internal, the lower edge of medial surface and upper
The inner wall of portion's through-hole intersects so that when oil sealing is packed by way of groove, reduction oil sealing resistance caused by it by groove lower edge,
When oil sealing, which is under pressure, to be displaced outwardly, there is resistance in groove top edge to it.
Further, the intersection of upper surface in groove and upper through-hole side wall is limited to right angle by the present invention, can be effective
By oil sealing side protrusion card master, increase prevent oil sealing abjection end cap resistance.
Further, the present invention sets the first inner wall to have angle with the axis of end cap, convenient for oil sealing at the top of end cap
It is packed into, groove is set between the first inner wall and the second inner wall, makes oil sealing top and the bottom all by frictional force, and groove can have
The prevention oil sealing of effect is deviate from, and raised support oil sealing is arranged in sidewall bottom, on the one hand can reduce extrusion pressure from oil sealing bottom, separately
On the one hand oil sealing can be limited.
Further, the present invention limit the second inner wall and third inner wall height, i.e., oil sealing be in upper through-hole it is close in
Between position, it is ensured that oil sealing and the contact area above and below end cap inner wall are almost the same.
Further, rounded corner processing is carried out in the intersection of different sides on side wall, eliminates intersection in machining process
The burr of middle generation, prevents oil sealing from being scratched by burr in assembling process, influences sealing effect.
Further, the radius of rounded corner is defined so that the fillet poured out meets machining requirements.
Further, the height of groove is defined, ensures that end cap does not influence oil sealing and end cap inner wall because increasing groove
Effective contact area, influence the frictional force between oil sealing and end cap.
【Description of the drawings】
Fig. 1 is common end cap structural schematic diagram；
Fig. 2 is oil enveloping structure schematic diagram；
Fig. 3 is the end cover structure schematic diagram that the present invention increases groove；
Fig. 4 is that end cap of the present invention increases schematic diagram at groove details A；
Fig. 5 is that oil sealing is packed into end cap schematic diagram；
Fig. 6 is that oil sealing deviates from end cap schematic diagram.
Wherein：1- end caps；2- upper through-holes；3- oil sealings；4- grooves；The first inner walls of 5-；The second inner walls of 6-；In 7- thirds
Wall；8- protrusions；9- glands.
【Specific implementation mode】
The present invention is described in further detail below in conjunction with the accompanying drawings：
The invention discloses a kind of preventing oil seals to deviate from end cover structure, and end cap 1 offers upper through-hole 2, and gland 9 is mounted on upper
In portion's through-hole 2, oil sealing 3 is mounted between upper through-hole 2 and gland 9, and upper through-hole 2 opens up groove 4 on its side wall, and top is logical
The side wall in hole 2 is divided into downwards the first inner wall 5, the second inner wall 6 and third inner wall 7, upper through-hole from the top of upper through-hole 2
2 lower edges are provided with inside protrusion 8.
Referring to Fig. 1 and Fig. 2, Fig. 1 is common end cap, and upper through-hole 2 is offered among end cap 1；Fig. 2 is that oil sealing 3 is mounted on
The schematic diagram of end cap 1 is equipped with gland 9 in upper through-hole 2, is equipped with for sealing off gap between upper through-hole 2 and gland 9
Oil sealing 3, the lateral surface that oil sealing 3 is contacted with 2 side wall of upper through-hole is set as uneven, with increasing friction force.
Referring to Fig. 3 and Fig. 4, on the side wall of upper through-hole 2, groove 4, the top of 4 inner side edge of groove are opened up along its circumferential direction
Edge is inside end cap 1, the side wall intersection of the lower edge and upper through-hole 2 of 4 inner side edge of groove, and upper surface and top are logical in groove 4
The side wall in hole 2 intersects vertically；Because opening up groove 4, the side wall of upper through-hole 2 is divided into three parts, and the first inner wall 5 is in end cap 1
The intersection of 2 side wall of top and upper through-hole, the wall surface of the first inner wall 5 and the axis of end cap 1 there are angle β, 0 ° of 90 ° of ＜ β ＜,
Facilitate the loading of oil sealing 3；First inner wall 5 and the second inner wall 6 connect, and groove 4 is offered between the second inner wall 6 and third inner wall 7,
Second inner wall 6 is parallel with the axis direction of end cap 1 with the wall surface of third inner wall 7, and 7 bottom of third inner wall is circumferentially provided with along it
Inwardly projecting protrusion 8, protrusion 8 is for limiting the bottom of oil sealing 3.
Referring to Fig. 4, groove 4 opens up height h as in 2 inner wall intersection to groove 4 of upper surface and upper through-hole in groove 4
The vertical range of side lower edge.The height of h need to ensure effective contact area of oil sealing 3 and 1 inner wall of end cap, that is, ensure 3 He of oil sealing
There is enough frictional force between end cap 1；Experiments have shown that 4 height of groove accounts for 1 height maxima of end cap no more than 20%, top
The height of through-hole 2 is H, i.e. h/H≤0.2；Groove 4 opens up position and need to ensure upper and lower sides and top of the oil sealing 3 in groove 4 simultaneously
The contact area of through-hole 2 is almost the same, therefore groove 4 is opened in best near the centre position of upper through-hole 2, i.e. the second inner wall
6 height and 7 height of third inner wall are equal.
Sealing effect is influenced to prevent oil sealing 3 from being scratched by burr in assembling process referring to Fig. 4, in the corner angle of end cap 1
Place carries out rounded corner processing, each in Fig. 4 is drawn at circle place as rounded corner, specially：6 phase of first inner wall 5 and the second inner wall
At friendship, lower edge and raised 8 intersections of 4 inner side edge lower edge of groove and 7 intersection of third inner wall and third inner wall 7,
The radius of fillet is preferably 0.2-0.5mm.
The course of work：
Referring to Fig. 5 and Fig. 6, during oil sealing 3 is packed into upper through-hole 2, oil sealing 3 by external force to end cap 1 and gland 9 it
Between squeeze, the edges and corners of end cap 1 can prevent oil sealing 3 from being drawn after carrying out rounded corner.Gearbox during the work time, 3 meeting of oil sealing
By outwardly against power, the lateral surface of one side oil sealing 3 is uneven, it is possible to increase rubbing between oil sealing 3 and upper through-hole 2
Power to be wiped, groove 4 is set on the side wall of another aspect upper through-hole 2, the side wall intersection of groove 4 and upper through-hole 2 is right angle, when
When oil sealing 3 is displaced outwardly, groove 4 can increase resistance to the protrusion of oil sealing 3.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.
Claims (8)
1. a kind of preventing oil seal deviates from end cap, which is characterized in that including end cap (1), end cap (1) offers upper through-hole along its axial direction
(2), upper through-hole (2) and end cap (1) coaxially, offer the groove (4) coaxial with end cap (1) on the side wall of upper through-hole (2)；
The contact surface bumps of the side wall of upper through-hole (2) and oil sealing (3) contact of sealing, oil sealing (3) and upper through-hole (2) side wall are not
It is flat.
2. a kind of preventing oil seal according to claim 1 deviates from end cap, which is characterized in that groove (4) interior side it is following
The side wall of edge and upper through-hole (2) intersects.
3. a kind of preventing oil seal according to claim 1 deviates from end cap, which is characterized in that the interior upper surface of groove (4) and top
The intersection of through-hole (2) side wall is right angle.
4. a kind of preventing oil seal according to claim 1 deviates from end cap, which is characterized in that the side wall of upper through-hole (2) is by upper
The top of portion's through-hole (2) is divided into downwards three parts：First inner wall (5), the second inner wall (6) and third inner wall (7), each
The circle that the edge line of inner wall surrounds is each perpendicular to the axis of upper through-hole (2)；First inner wall (5) and the second inner wall (6) connect, ditch
Slot (4) is between the second inner wall (6) and third inner wall (7)；First inner wall (5) and the angle of upper through-hole (2) axis are β,
0 ° of 90 ° of ＜ β ＜；The protrusion (8) touched with oil sealing (3) bottom connection is provided at the lower edge of third inner wall (7).
5. a kind of preventing oil seal according to claim 4 deviates from end cap, which is characterized in that the height of the second inner wall (6) and the
The height of three inner walls (7) is equal.
6. a kind of preventing oil seal according to claim 4 deviates from end cap, which is characterized in that the first inner wall (5) and the second inner wall
(6) intersection, groove (4) interior side and third inner wall (7) intersection and third inner wall (7) and raised (8) intersection are equal
Carry out rounded corner processing.
7. a kind of preventing oil seal according to claim 6 deviates from end cap, which is characterized in that the radius for pouring out fillet is
0.2~0.5mm.
8. a kind of preventing oil seal according to claim 1-7 any one deviates from end cap, which is characterized in that upper through-hole (2)
Height be H, the interior upper surface of groove (4) and upper through-hole (2) side wall intersection to groove (4) inner side edge lower edge vertical range
For the vertical height h of groove (4), h/H≤0.2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810410646.5A CN108571579A (en) | 2018-05-02 | 2018-05-02 | A kind of preventing oil seal abjection end cover structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810410646.5A CN108571579A (en) | 2018-05-02 | 2018-05-02 | A kind of preventing oil seal abjection end cover structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108571579A true CN108571579A (en) | 2018-09-25 |
Family
ID=63575524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810410646.5A Pending CN108571579A (en) | 2018-05-02 | 2018-05-02 | A kind of preventing oil seal abjection end cover structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108571579A (en) |
Citations (13)
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