CN210218616U - Crankshaft front oil seal assembly - Google Patents

Abstract

The utility model is suitable for a vehicle spare part technical field provides a sealed assembly of oil blanket before bent axle, including shroud, belt pulley and the oil blanket in right time, the shroud is located one side of belt pulley in right time. The belt pulley comprises a hub and a belt pulley body; the hub includes a boss portion, a rim portion, and a spoke portion. A safety clearance is formed between the timing cover and the rim part; the rim part protrudes out of the spoke part, and the protruding part, the spoke part and the rim part are enclosed to form a hub groove; the timing cover includes a timing cover body and a guard extending toward the hub recess. The utility model provides an oil blanket seals assembly before bent axle compares with prior art, through addding from the protective body of formal shroud body towards the extension of wheel hub recess, can play and stop the foreign matter and flow into oil blanket department, restrain the accumulational effect of foreign matter to reduce the possibility that the foreign matter flowed into the engine inside.

Description

Crankshaft front oil seal assembly

Technical Field

The utility model belongs to the technical field of vehicle parts, more specifically say, relate to a sealed assembly of oil blanket before bent axle.

Background

An engine serving as a power source in a vehicle is one of vehicle core components, the driving state of the engine directly influences the driving experience of a user, and whether the engine can normally operate is closely influenced by the working environment of the engine, such as the ambient temperature of the vehicle, the driving road condition state (flatness, cleanliness and the like), the vehicle using habit of the user and the like. The development process of one vehicle can simulate the vehicle using environment of an actual user as much as possible, tests are carried out on the vehicle, verification is carried out, optimization and improvement are promoted, and the vehicle using environment can not be considered in extreme special vehicle using environment. For example, the running road conditions are muddy/silt, and in such a situation, the engine compartment of the vehicle inevitably splashes into the sandy soil, so that a new challenge is brought to the engine sealing performance, and especially, special sealing parts, such as a crankshaft front/rear oil seal, are designed to mainly prevent the leakage of lubricating oil inside the engine.

Referring to fig. 1, the main structure of the oil seal sealing portion is a sealing lip and a dust lip, and the sealing lip and the matching motion shaft are in interference fit to play a main sealing role; the dust lip is in clearance fit with the matching moving shaft, and plays a certain role in dust protection. When the crankshaft rotates, different pressure changes can be generated in the inner side and the outer side of the oil seal, so that certain inward suction force is formed on the inner side of the oil seal relative to the outer side, namely, an oil pumping effect is generated, then, lubricating oil flowing to the outer side on the inner side of the oil seal is sucked back to the inner side, and the purpose of preventing the lubricating oil from leaking is achieved.

However, if the wrapping performance of the engine room carrying the vehicle is poor, small foreign matters such as soil, sand, liquid and the like are easy to splash into the engine room and cover the surface of the engine, and the rear oil seal of the crankshaft is covered by the shell of the gearbox and works in a relatively sealed space, so that the problem generally does not occur; the assembly part of the crankshaft front oil seal is relatively open, the sealing performance is relatively weak, particularly, when a transverse engine is arranged, foreign matters such as mud, sand and liquid splashed by wheels are easy to splash to the working surface of the transverse engine in the running process of a vehicle, and the accumulated foreign matters such as mud, sand and liquid are easy to be sucked into the engine to cause the problems of abrasion and the like by combining the working characteristic of the oil pumping effect, so that the design protection of the working environment of the crankshaft front oil seal is urgently needed at the present stage.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an oil blanket seals assembly before bent axle aims at solving among the prior art the oil blanket existence make the accumulation foreign matter easily and sucked the inside technical problem that brings out wearing and tearing of engine.

In order to achieve the above object, the present invention provides a crankshaft front oil seal assembly, which includes a timing cover, a belt pulley and an oil seal, wherein the timing cover is located on one side of the belt pulley, the belt pulley is of a revolving body structure, and the belt pulley includes a hub and a belt pulley body sleeved on the periphery of the hub; the hub comprises a convex part taking the axis of the belt pulley as the center, a rim part positioned on the periphery of the convex part and taking the axis of the belt pulley as the center, and a spoke part used for connecting the convex part and the rim part; the protrusion is configured to protrude along the pulley axis toward the timing cover side; the timing cover cap is provided with a mounting hole and is sleeved on the periphery of the boss through the mounting hole; the oil seal is arranged between the mounting hole and the bulge part;

a safety clearance is provided between the timing cover and the rim portion;

the outer edge of the rim part close to the timing cover cap protrudes out of the spoke part, and the protruding part, the spoke part and the rim part are surrounded to form a hub groove taking the axis of the belt pulley as the center;

the timing cover comprises a timing cover body and a protection body used for blocking foreign matters from flowing to the oil seal, and the protection body is arranged on the timing cover body and extends towards the hub groove.

Further, an outer edge of the protector extends between an outer edge of the rim portion and an outer edge of the spoke portion.

Furthermore, a chamfer structure facilitating the flow of foreign matters to the safety gap is arranged at the connection position of the rim part and the spoke part on one side close to the timing cover.

Further, the chamfer structure is a fillet structure.

Further, the inner ring of the protection body is configured with an annular inclined surface facilitating the flow of foreign matters to the chamfer structure.

Further, the included angle between the inclined surface and the axis of the belt pulley ranges from 10 degrees to 30 degrees.

Furthermore, the timing cover body is provided with a positioning boss, the positioning boss protrudes towards the spoke part, and the inner ring of the positioning boss encloses to form the mounting hole.

Furthermore, a foreign matter separation sedimentation tank is arranged on the timing cover body, and an opening of the foreign matter separation sedimentation tank faces the spoke part and is positioned between the protective body and the positioning boss.

Furthermore, the spoke part is provided with a plurality of hollow windows which are annularly and uniformly distributed along the axis, and the distance from the inner ring of each hollow window to the axis of the belt pulley is less than or equal to the distance from the inner ring of the positioning boss to the axis of the belt pulley.

Further, the belt pulley still includes the spring shock absorber that is used for elastic connection the wheel hub with the belt pulley body, the spring shock absorber set up in wheel hub with between the belt pulley body.

The utility model provides an oil blanket seals assembly before bent axle compares with prior art, through addding from the protective body of formal shroud body towards the extension of wheel hub recess, can play and stop the foreign matter and flow into oil blanket department, restrain the accumulational effect of foreign matter to reduce the possibility that the foreign matter flowed into the engine inside.

Drawings

FIG. 1 is a schematic view of an oil seal in use;

fig. 2 is a schematic cross-sectional view of a crankshaft front oil seal assembly provided in an embodiment of the present invention;

FIG. 3 is a schematic view of the timing cover of FIG. 2;

FIG. 4 is a schematic view of FIG. 2 with the timing cover removed;

fig. 5 is a schematic view of a belt pulley in the crankshaft front oil seal assembly according to an embodiment of the present invention;

fig. 6 is an application schematic diagram of the crankshaft front oil seal assembly provided by the embodiment of the present invention.

In the figure: 100-oil sealing; 110-sealing lip; 120-dust lip prevention; 200-a timing cover; 210-a guard; 211-annular inclined surface; 220-positioning a boss; 230-foreign matter isolating deposition groove; 240-mounting holes; 300-a belt pulley; 310-a hub; 311-a boss; 312-a rim portion; 313-a spoke portion; 3131-hollowing out the window; 314-a chamfer structure; 320-a pulley body; 330-spring shock absorber; 400-fastening bolts; 500-an engine crankshaft; 600-foreign matter; 700-safety gap; an O-axis; the projection of the L-shaped protective body and the wheel rim part on the axis coincides with each other in size.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It should be noted that the terms "length," "width," "height," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," "tail," and the like, are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and for simplicity in description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.

It is also noted that, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," "disposed," and the like are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Further, "plurality" or "a plurality" means two or more unless specifically limited otherwise.

Fig. 2 relates to the utility model discloses oil blanket seal assembly before bent axle that embodiment provided, for the convenience of explanation, defines the axis that the O axle is the belt pulley in the drawing, and the negative direction of X corresponds the engine inboard, and the positive direction of the Y of perpendicular to axis corresponds keeps away from the engine axis direction.

Referring to fig. 2 to fig. 6, an embodiment of the crankshaft front oil seal assembly according to the present invention will now be described. The crankshaft front oil seal assembly comprises a timing cover 200, a belt pulley 300 and an oil seal 100. The pulley 300 is a solid structure having its axis as the center, and the timing cover 200 is located on one side of the pulley 300, and generally the timing cover 200 is located on the inner side of the engine than the pulley 300.

The pulley 300 includes a hub 310 and a pulley body 320 disposed around the hub 310. The hub 310 includes a boss 311, a rim 312 located at an outer periphery of the boss 311, and an annular spoke 313 for connecting the boss 311 and the rim 312.

As the name implies, the rim 31 is located at the edge (outer ring) of the hub 310, and the boss 311 is located at the middle portion of the hub 310, and since the pulley 300 is a solid-of-revolution structure, the boss 311, the rim 312, and the spoke 313 are all in an annular structure with the axis of the pulley 300 as the center. The pulley body 320 is fitted around the outer periphery of the rim 31.

The protrusion of the convex portion 311 protrudes along the axis and toward one side of the timing cover 200, the timing cover 200 is provided with a mounting hole 240, the mounting hole 240 of the timing cover 200 is sleeved on the periphery of the convex portion 311, the oil seal 100 is installed in the mounting hole 240, specifically between the inner wall of the mounting hole 240 and the convex portion 311, and the oil seal 100 is sleeved on the periphery of the convex portion 311. The oil seal 100 is of a prior art construction and will not be described in detail herein.

The outer edge of the rim 312 close to the timing cover 200 protrudes from the spoke 313, that is, the outer edge of the rim 312 protrudes from the outer edge of the spoke 313 toward the timing cover 200, so that the protrusion 311, the spoke 313 and the rim surround to form an annular hub groove centered on the axis, the hub groove is a semi-surrounding groove, the opening of the hub groove faces the timing cover 200, and a safety gap 700 is generally formed between the timing cover 200 and the rim 312, and foreign matters can flow into and out of the hub groove through the safety gap 700.

The timing cover 200 includes a timing cover body and a protector 210 for blocking foreign matter from flowing to the oil seal 100, and the protector 210 is provided on the timing cover body and extends toward the hub recess, i.e., the protector 210 extends convexly toward the spoke portion 313 or the rim portion 312. The protective body 210 may be a ring-shaped structure, which has an unlimited specific structure and shape, and is a protruding structure that acts as an interception barrier.

Thus, the protection body 210 spans between the safety clearance 700 (or the rim 312) and the oil seal 100, the annular cavity formed by the timing cover cap 200 and the hub 310 is partitioned by the protection body 210, so that the path for foreign matters to flow into the oil seal 100 from the safety clearance 700 is not smooth, the protection body 210 can intercept and block most foreign matters such as silt splashed in the axial radial direction for the first time, and the foreign matters collide with the annular protection body 210 and splash to the hub 310, under the circumferential operation centrifugal force of the hub 310, the foreign matters such as silt are easily thrown to the direction far away from the mounting hole 240 again, and the foreign matters such as silt cannot directly reach the oil seal 100, so that the foreign matters such as silt are prevented from being deposited on the mounting surface of the oil seal 100 to break through the dust lip 120, and the possibility of entering the inside of an engine under the action of the oil pumping effect is greatly reduced.

The boss 311 is provided with a through hole, and the embodiment of the present invention provides a front end of the crankshaft 50, to which the belt pulley 300 is fixed by the fastening bolt 40 passing through the through hole, during the sealing assembly of the crankshaft. The engine crankshaft 50 can drive the pulley 300 to rotate circumferentially, and the oil seal 100 can achieve a dynamic sealing function between the mounting hole 240 and the pulley 300. The timing cover 200 is typically mounted to the front end of the cylinder block/head (not shown).

The embodiment of the utility model provides an oil blanket seals assembly before bent axle compares with prior art, through addding from the protective body of formal shroud body towards the extension of wheel hub recess, can play and block foreign matter inflow oil blanket department, the accumulational effect of suppression foreign matter to reduce the possibility that the foreign matter flows into the engine inside.

As a specific embodiment of the crankshaft front oil seal assembly provided in the present invention, the oil seal 100 is connected with the inner wall of the mounting hole 240 by interference fit.

As the utility model provides a concrete implementation of oil blanket seal assembly before bent axle, timing shroud 200 is cast aluminium material component, and timing shroud 200 casts the shaping earlier, carries out the machine-shaping to mounting hole 240 again afterwards, and the mould precision of making timing shroud 200 like this does not need too high, reduces manufacturing cost.

As a specific embodiment of the utility model provides a before the bent axle oil blanket seal assembly, wheel hub 310 is formed for the metal material casting.

Referring to fig. 2 and 6, as a specific embodiment of the crankshaft front oil seal assembly provided by the present invention, the protecting body 210 extends into the hub groove, that is, the outer edge of the protecting body 210 extends between the outer edge of the rim 312 and the outer edge of the spoke 313.

Thus, the annular cavities of the timing cover 200 and the hub 310 are divided into a "labyrinth" structure by the rim 312 and the protector 210, so that the path through which the foreign matters flow from the safety clearance 700 into the oil seal 100 is a more obstructed "labyrinth" type path, and the foreign matters such as silt splashed in the axial radial direction are further greatly intercepted.

Referring to fig. 2 and fig. 6, as a specific embodiment of the crankshaft front oil seal assembly provided by the present invention, because the outer edge of the protecting body 210 extends to between the outer edge of the rim 312 and the outer edge of the spoke 313, the protecting body 210 and the rim 312 have some overlapped portions in the axial direction, and the projected overlapping size of the protecting body 210 and the rim 312 on the axial direction is greater than or equal to 2mm, that is, the projected size of the overlapped portion of the protecting body 210 and the rim 312 in the axial direction of the hub 310 is greater than or equal to 2mm, so that the "labyrinth" structure better intercepts and blocks foreign matters.

Referring to fig. 2, 4 and 6, as an embodiment of the crankshaft front oil seal assembly according to the present invention, a chamfer structure 314 for facilitating the flow of foreign matter to the safety gap 700 is disposed at a connection portion between the rim 312 and the spoke 313 near the timing cover 200. The chamfer structure 314 may be an oblique chamfer or an arc chamfer, and the chamfer structure 314 facilitates the foreign objects to be easily thrown away from the mounting hole 240 under the circumferential operation centrifugal force of the hub 310 after the foreign objects collide with the annular protection body 210 and splash.

Referring to fig. 2, fig. 4 and fig. 6, as a specific embodiment of the crankshaft front oil seal assembly provided by the present invention, the chamfer structure 314 is a fillet structure.

Referring to fig. 2, 3 and 6, as a specific embodiment of the crankshaft front oil seal assembly provided by the present invention, the inner ring of the protection body 210 is configured with an annular inclined surface 211 for allowing the foreign matter to flow to the chamfer structure 314 by using the gravity thereof. In order to be affected by the weight of the foreign matter, the end of the inclined surface 211 close to the rim 312 is away from the axis of the pulley 300, and the end of the inclined surface 211 remote from the rim 312 is close to the axis.

Referring to fig. 2, 3 and 6, in consideration of the casting feasibility of the protection body 210 and the function of facilitating the outflow of foreign matters, the included angle between the inclined surface 211 and the axis of the pulley 300 is 10-30 °, according to an embodiment of the crankshaft front oil seal assembly provided by the present invention.

Please refer to fig. 2, fig. 3 and fig. 6, as a specific embodiment of the crankshaft front oil seal assembly provided by the present invention, the timing cover body is provided with a positioning boss 220, the positioning boss 220 may be an annular boss structure, the positioning boss 220 protrudes toward the spoke portion 313, the inner ring of the positioning boss 220 encloses to form the mounting hole 240, and the positioning boss 220 can also play a role of stopping the flow of foreign matters toward the oil seal 100.

Referring to fig. 2 and 5, as a specific embodiment of the crankshaft front oil seal assembly provided in the present invention, the spoke portion 313 is provided with a plurality of hollow windows 3131 annularly and uniformly distributed along the axis of the pulley, and the distance from the inner ring of the hollow window 3131 to the axis of the pulley is less than or equal to the distance from the inner ring of the positioning boss 220 to the axis of the pulley.

Referring to fig. 2, 3 and 6, as a specific embodiment of the crankshaft front oil seal assembly provided by the present invention, the timing cover body is provided with a foreign matter partition depositing slot 230, the foreign matter partition depositing slot 230 may be an annular slot, and an opening of the foreign matter partition depositing slot 230 faces the spoke portion 313 and is located between the protector 210 and the positioning boss 220.

If foreign matters such as silt and the like radially break through the protection line of the protection body 210 extending out of the timing cover 200, or a small amount of foreign matters possibly splash into the hub groove through the hollow window 3131 of the pulley 300 (in a rotating state), the foreign matters partition and deposition groove 230 and the positioning boss 24 can play a role in depositing the foreign matters splashed into the hub groove, thereby realizing a function of blocking the foreign matters from directly reaching the oil seal 100; inclined surface 211 facilitates the egress of settled silt out of safety clearance 700 by gravity.

Referring to fig. 2, 3 and 6, as a specific embodiment of the crankshaft front oil seal assembly provided by the present invention, the outer ring of the positioning boss 220 and the inclined surface 211 together form the inner wall of the foreign material partition deposition groove 230.

As a specific embodiment of the crankshaft front oil seal assembly provided in the present invention, the rotation axis of the protective body 210, the foreign matter partition deposition groove 230 and the positioning boss 220 coincides.

As a specific embodiment of the crankshaft front oil seal assembly provided in the present invention, after the timing cover 200 is installed on the pulley 300, the rotation axis of the protection body 210 coincides with the axis of the pulley 300.

Referring to fig. 2, as a specific embodiment of the crankshaft front oil seal assembly provided by the present invention, the belt pulley 300 further includes a spring damping body 330 for elastically connecting the hub 310 and the belt pulley body 320, the spring damping body 330 is disposed between the hub 310 and the belt pulley body 320, so the embodiment of the present invention provides a belt pulley 300 of the crankshaft front oil seal assembly, which is an elastic damping type belt pulley.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. The crankshaft front oil seal assembly comprises a timing cover cap, a belt pulley and an oil seal, wherein the timing cover cap is positioned on one side of the belt pulley, the belt pulley is of a revolving body structure, and the belt pulley comprises a hub and a belt pulley body sleeved on the periphery of the hub; the hub comprises a convex part taking the axis of the belt pulley as the center, a rim part positioned on the periphery of the convex part and taking the axis of the belt pulley as the center, and a spoke part used for connecting the convex part and the rim part; the protrusion is configured to protrude along the pulley axis toward the timing cover side; the timing cover cap is provided with a mounting hole and is sleeved on the periphery of the boss through the mounting hole; the oil seal is installed between the mounting hole and the boss portion, characterized in that,

a safety clearance is provided between the timing cover and the rim portion;

the outer edge of the rim part close to the timing cover cap protrudes out of the spoke part, and the protruding part, the spoke part and the rim part are surrounded to form a hub groove taking the axis of the belt pulley as the center;

the timing cover comprises a timing cover body and a protection body used for blocking foreign matters from flowing to the oil seal, and the protection body is arranged on the timing cover body and extends towards the hub groove.

2. A crankshaft front oil seal assembly as defined in claim 1 wherein said shield outer edge extends between said rim outer edge and said spoke outer edge.

3. A front oil-seal assembly of a crankshaft as set forth in claim 1, wherein the junction of the rim portion and the spoke portion near the timing cover is provided with a chamfer structure for facilitating the flow of foreign matters to the relief clearance.

4. A crankshaft front oil seal assembly as defined in claim 3 wherein said chamfer structure is a fillet structure.

5. A crankshaft front oil-seal assembly according to claim 3, wherein the inner ring of the protecting body is configured with an annular inclined surface for facilitating the flow of foreign materials to the chamfer structure.

6. A front oil seal assembly of a crankshaft as claimed in claim 5, wherein the inclined surface is inclined at an angle in the range of 10 ° to 30 ° to the axis of the pulley.

7. The crankshaft front oil-seal assembly of claim 1, wherein the timing cover body is provided with a positioning boss which protrudes towards the spoke part, and the inner ring of the positioning boss encloses to form the mounting hole.

8. The crankshaft front oil-seal assembly of claim 7, wherein the timing cover body is provided with a foreign matter blocking deposition groove, and the foreign matter blocking deposition groove is opened towards the spoke part and is positioned between the protective body and the positioning boss.

9. The crankshaft front oil seal assembly according to claim 7, wherein the spoke portion is provided with a plurality of hollow windows annularly and uniformly distributed along the axis, and the distance from the inner ring of each hollow window to the axis of the pulley is smaller than or equal to the distance from the inner ring of the positioning boss to the axis of the pulley.

10. A crankshaft front oil seal assembly as claimed in any one of claims 1 to 9, wherein said pulley further comprises a spring damper for elastically connecting said hub and said pulley body, said spring damper being disposed between said hub and said pulley body.

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