CN212839384U - Sealed transfer case of output shaft and car - Google Patents

Abstract

The utility model discloses an output shaft sealing transfer case, an output shaft is rotatably arranged on a shell through a bearing and is sealed through an oil seal; an output flange is sleeved at the end part of the output shaft, a stepped surface is arranged in the inner cavity of the output flange, a locking nut is matched with the thread on the output shaft, the locking nut can be contacted with the stepped surface of the output flange, and the output flange and the output shaft are relatively fixed along with the continuous screwing of the locking nut; the output shaft is the step shaft, the sealing washer of suit on it, sealing washer one side can push up on the ladder face, the at least side surface protrusion of sealing washer sets up sealed ribbing, the thickness of ribbing department is great, sealed ribbing can contact with the step face and/or the lock of output shaft female, when the sealing washer receives the mutual extrusion of lock mother and output shaft ladder face, the step face will seal the ribbing extrusion deformation with the lock mother, make the thickness of sealed ribbing department reduce, the surface area increase of sealing washer, can realize sealing with the outer loop and the inner ring of sealing washer better.

Description

Sealed transfer case of output shaft and car

Technical Field

The utility model relates to the field of automotive technology, further relate to an output shaft seals transfer case. Furthermore, the utility model discloses still relate to an automobile.

Background

In a multi-shaft-drive vehicle, a transfer case is generally mounted to distribute power output from a transmission to transaxles. The input shaft of the transfer case is directly connected with the second shaft of the speed changer or is connected with the second shaft of the speed changer through a universal transmission device, and a plurality of output shafts are respectively connected with each drive axle through the universal transmission device.

Transfer case output shaft end flange, traditional transfer case output flange passes through the cooperation of plane rubber circle with the output shaft and seals, and is higher to the required precision of rubber circle, and the clearance can be filled better to the rubber circle is great, but difficult assembly, and the rubber circle is less takes place easily to leak, uses ageing along with the rubber circle, appears the oil leak problem more easily.

How to achieve better sealing is a technical problem to be solved at present for those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model provides a sealed transfer case of output shaft can extrude the sealed ribbing on the sealing washer and warp, makes the sealing washer realize sealed better, and concrete scheme is as follows:

an output shaft sealing transfer case comprises a shell and an output shaft, wherein the output shaft is rotatably arranged on the shell through a bearing and is sealed through an oil seal;

an output flange is sleeved at the end part of the output shaft, a stepped surface is arranged in the inner cavity of the output flange, and a locking nut is matched with the thread on the output shaft to relatively fix the output flange and the output shaft;

the output shaft is a stepped shaft, a sealing ring is sleeved on the stepped shaft, a sealing rib is convexly arranged on the surface of at least one side of the sealing ring, and the sealing rib can be in contact with the stepped surface of the output shaft and/or the lock nut.

Optionally, the sealing bead is provided as a ring.

Optionally, the sealing bead is disposed at a position of the sealing ring near the inner ring.

Optionally, the sealing bead is a continuous annular ring.

Optionally, the sealing bead is an interrupted ring.

Optionally, the cross-section of the sealing bead is semi-circular.

Optionally, the protruding height of the sealing bead is less than or equal to 2 mm.

The utility model also provides an automobile, including above-mentioned arbitrary output shaft seal transfer case.

The utility model provides an output shaft sealing transfer case, wherein an output shaft is rotatably arranged on a shell through a bearing and is sealed through an oil seal; an output flange is sleeved at the end part of the output shaft, a stepped surface is arranged in the inner cavity of the output flange, a locking nut is matched with the thread on the output shaft, the locking nut can be contacted with the stepped surface of the output flange, and the output flange and the output shaft are relatively fixed along with the continuous screwing of the locking nut; the output shaft is the step shaft, the sealing washer of suit on it, sealing washer one side can push up on the ladder face, the at least side surface protrusion of sealing washer sets up sealed ribbing, the thickness of ribbing department is great, sealed ribbing can contact with the step face and/or the lock of output shaft female, when the sealing washer receives the mutual extrusion of lock mother and output shaft ladder face, the step face will seal the ribbing extrusion deformation with the lock mother, make the thickness of sealed ribbing department reduce, the surface area increase of sealing washer, can realize sealing with the outer loop and the inner ring of sealing washer better.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a partial structural sectional view of an output shaft sealing transfer case provided by the present invention;

FIG. 2 is a side cross-sectional view of one embodiment of a seal bead;

FIG. 3 is a view of a seal ring structure with a ring of sealing beads;

FIG. 4 is a front view of a seal ring with two rings of sealing beads;

fig. 5 is a front view of the seal ring with the seal bead in a discontinuous configuration.

The figure includes:

the device comprises a shell 1, an output shaft 2, an oil seal 3, an output flange 4, a lock nut 5, a sealing ring 6 and a sealing rib 61.

Detailed Description

The core of the utility model lies in providing an output shaft seals transfer case, can extrude the sealed ribbing deformation on the sealing washer, make the sealing washer realize sealing better.

In order to make those skilled in the art better understand the technical solution of the present invention, the output shaft sealing transfer case and the automobile of the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1, it is a sectional view of a partial structure of an output shaft sealing transfer case provided by the present invention; the transfer case comprises a shell 1, an output shaft 2, an oil seal 3, an output flange 4, a lock nut 5, a sealing ring 6 and the like. The output shaft 2 is rotatably mounted on the housing 1 through a bearing, the output shaft 2 can rotate relative to the housing 1, and the output shaft 2 and the housing 1 are sealed through an oil seal 3.

The end part of the output shaft 2 is sleeved with an output flange 4, the inner cavity of the output flange 4 is provided with a step surface, the step surface is formed by an interface with an abrupt change of the inner diameter, and the step surface is vertical to the axis of the output shaft 2. The output shaft 2 is a stepped shaft, the stepped shaft is provided with sections with different sizes, the size between two adjacent sections is suddenly changed to form a step, and the step surface is approximately vertical to the axial direction of the output shaft 2.

The outer diameter of the tail end of the output shaft 2 is the minimum, an external thread is arranged on the outer surface of the tail end, and the lock nut 5 is connected with the external thread of the tail end in a matched mode; when the lock nut 5 is continuously locked with the output shaft 2, the output flange 4 and the output shaft 2 can be relatively fixed, and one side surface of the lock nut 5 can be relatively attached and contacted with the stepped surface on the output flange 4.

The output shaft 2 is sleeved with the sealing ring 6, one side surface of the sealing ring 6 is in contact with the stepped surface of the output shaft 2, the other side surface of the sealing ring 6 can be in contact with the surface of the lock nut 5, and when the lock nut 5 is screwed continuously, the sealing ring 6 can be pressed to deform.

At least one side surface of the sealing ring 6 is convexly provided with a sealing bead 61, that is, the sealing bead 61 can be arranged on one side surface of the sealing ring 6, and also can be arranged on two side surfaces of the sealing ring 6, and the sealing bead 61 can be contacted with the step surface of the output shaft 2 and/or the lock nut 5. FIG. 2 is a side cross-sectional view of an embodiment of the sealing beads 6; the two sides of the sealing ring 6 are provided with sealing beads 61, the sealing beads 61 on two sides are respectively contacted with the stepped surface of the output shaft 2 and the side surface of the locking nut 5, the sealing ring 6 and the whole thickness of the sealing beads 61 are larger than the distance between the stepped surface of the output shaft 2 and the locking nut 5, when the locking nut 5 is screwed, the extrusion force can be applied to the sealing beads 61, so that the sealing beads 61 are elastically deformed, the thickness of the sealing beads 61 after deformation is reduced, correspondingly, the area of the whole sealing ring 6 is increased, the contact between the inner ring of the sealing ring 6 and the side wall of the output shaft 2 is more sufficient, the contact between the outer ring of the sealing ring 6 and the output flange 4 is more sufficient, and the better oil sealing effect is realized.

The utility model discloses a sealed transfer case of output shaft takes place elastic deformation through extrusion seal circle 6, can make the area increase of sealing washer 6, and the area of the initial condition of sealing washer 6 can set up slightly littlely to in the assembly, increase the area through extrusion deformation after the assembly, thereby realize more effective oil seal, needn't just keep interference fit with the inner chamber lateral wall of output flange when initial condition. When the output shaft 2, the output flange 4, the lock nut 5 and the sealing ring 6 are fixed relatively into a whole and rotate relative to the shell 1.

On the basis of the above scheme, the utility model provides an embodiment herein, sealed ribbing 61 on the sealing washer 6 sets up to the round, as shown in fig. 3, for being equipped with the sealed sealing washer structure chart of the sealed ribbing of round, the side that also is equipped with sealed ribbing 61 only need set up the sealed ribbing of round 61 can. Of course, two or more rings of sealing beads 61 may be provided, as shown in fig. 4, which is a front view of the seal ring provided with two rings of sealing beads.

Preferably, as shown in fig. 3, the utility model provides a sealed ribbing 61 sets up and is close to the inner loop position at sealing washer 6, if sealed ribbing 61 sets up in the position that is close to the outer loop, then takes place to warp when sealed ribbing 61 receives the extrusion, probably has the part to move to between lock mother 5 and the output flange 4, causes the unable and lock mother 5 of step face of output flange 4 to closely laminate, and sealed ribbing 61 sets up then this phenomenon can not appear.

Preferably, the sealing beads 61 of the present invention are continuous rings, i.e., the structure shown in fig. 3 and 4; of course, the present invention does not exclude other arrangement forms, such as the front view of the sealing ring with the sealing beads in the discontinuous structure as shown in fig. 5; the sealing washer is pressed muscle 61 and is interrupted the ring structure, can realize same technological effect, and these specific embodiments all should be contained within the utility model discloses a within the scope of protection.

As shown in fig. 2, the cross section of the sealing rib 61 in the present invention is semicircular, and is uniformly deformed when being squeezed, so as to prevent from being crushed, and of course, the cross section of the sealing rib 61 can also adopt other shapes such as triangle, and these embodiments should also be included in the protection scope of the present invention.

Specifically, the utility model provides a protruding height less than or equal to 2mm of sealed ribbing 61.

The utility model provides a car, including foretell output shaft seal transfer case, the same technological effect can be realized to this car, and prior art is please refer to other structures of car, the utility model discloses no longer describe herein.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. The output shaft sealing transfer case is characterized by comprising a case (1) and an output shaft (2), wherein the output shaft (2) is rotatably arranged on the case (1) through a bearing and is sealed through an oil seal (3);

an output flange (4) is sleeved at the end part of the output shaft (2), a stepped surface is arranged in the inner cavity of the output flange (4), a locking nut (5) is matched with the thread on the output shaft (2), and the output flange (4) and the output shaft (2) are relatively fixed;

the output shaft (2) is a stepped shaft, a sealing ring (6) is sleeved on the stepped shaft, a sealing rib (61) is arranged on the surface of at least one side of the sealing ring (6) in a protruding mode, and the sealing rib (61) can be in contact with the stepped surface of the output shaft (2) and/or the lock nut (5).

2. The output shaft sealing transfer case of claim 1, wherein the sealing beads (61) are arranged in one turn.

3. The output shaft sealing transfer case of claim 2, characterized in that the sealing beads (61) are provided at the sealing ring (6) near the inner ring.

4. The output shaft sealing transfer case of claim 1, wherein the sealing beads (61) are continuous circular rings.

5. The output shaft sealing transfer case of claim 1, wherein the sealing beads (61) are discontinuous circular rings.

6. The output shaft sealing transfer case of claim 1, wherein the sealing beads (61) are semi-circular in cross-section.

7. The output shaft sealing transfer case of claim 1, wherein the sealing beads (61) protrude by a height less than or equal to 2 mm.

8. An automobile comprising an output shaft sealing transfer case according to any one of claims 1 to 7.

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