CN211321078U - Hollow shaft motor and oil seal thereof - Google Patents

Abstract

The utility model discloses a hollow shaft motor and oil blanket thereof, wherein the oil blanket of hollow shaft motor includes oil blanket skeleton and the elastic base body of parcel in the oil blanket skeleton outside, and elastic base body's outer peripheral face is the protruding structure of a plurality of evaginations, and the elastic base body inner peripheral surface is equipped with inside bellied fender dirt circle. When the oil seal is needed, the oil seal sleeve is arranged on the outer wall of the hollow shaft. Because the peripheral face of the elastic base body is of a plurality of convex structures, the elastic base body is locally contacted with the outside, the contact area of the elastic base body and the outside is reduced, the friction force of the peripheral face of the oil seal and the outside contact position is further reduced, and the follow-up property is improved. Meanwhile, the inner circumferential surface of the elastic base body is provided with the dust blocking ring protruding inwards, so that impurities are prevented from entering the connecting position of the elastic base body and the hollow shaft, the abrasion of the oil seal by the impurities is reduced, and the service life of the oil seal is prolonged.

Description

Hollow shaft motor and oil seal thereof

Technical Field

The utility model relates to a seal structure technical field, in particular to oil blanket of hollow shaft motor. The utility model discloses still relate to a hollow shaft motor including above-mentioned oil blanket.

Background

The motor adopts the hollow shaft motor in hybrid vehicle more, and wherein the axle head of hollow shaft motor adopts the oil blanket to protect, and wherein sealed effect and consumption and wearing and tearing between oil blanket and the hollow shaft play decisive effect.

Traditional oil blanket includes oil blanket skeleton and wraps up the elastic substrate in the oil blanket skeleton outside, and elastic substrate's outer peripheral face is smooth cylindrical structure, and hollow shaft motor constitutes parallel system with gearbox and engine, and the oil blanket is installed at the axle head of hollow shaft motor, rotates along with the axle.

However, because the outer peripheral face of the elastic base body is of a smooth cylindrical structure, the contact area between the outer periphery of the elastic base body and the outside is large, the elastic base body is subjected to large friction force during movement, the follow-up property of the oil seal is poor, the distance between the oil seal and the hollow shaft is large, impurities easily wear the oil seal, and the service life of the oil seal is shortened.

Therefore, how to improve the following performance of the oil seal and prolong the service life of the oil seal is a technical problem to be solved urgently by the technical personnel in the field.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an oil blanket of hollow shaft motor, the follow-up nature of this oil blanket improves, the life extension of oil blanket simultaneously. Another object of the utility model is to provide a hollow shaft motor including above-mentioned oil blanket.

In order to achieve the above object, the utility model provides an oil blanket of hollow shaft motor, be in including oil blanket skeleton and parcel the elastic base in the oil blanket skeleton outside, elastic base's outer peripheral face is the protruding structure of a plurality of evaginations, the elastic base inner peripheral surface is equipped with inside bellied dust ring.

Preferably, protruding structure is for winding the annular arch that the elastic base body periphery set up, annular arch is a plurality of, and is a plurality of annular arch is followed oil blanket axis direction is in proper order the equidistant distribution.

Preferably, the elastic base body, the protruding structure and the dust ring are of an integrally formed structure.

Preferably, the elastic base body, the protruding structure and the dust ring are rubber bodies.

Preferably, the oil seal further comprises a felt lip adhered to the elastic base, and the felt lip is adhered to a first end of the oil seal in the axial direction.

Preferably, be equipped with on the elastic base body to the second end open-ended U-shaped annular groove, first end with the second end is the both ends that set up dorsad, be equipped with the annular groove on the lateral wall that is close to the centre of a circle on the U-shaped annular groove, be used for placing the spring ring in the annular groove.

Preferably, the oil blanket skeleton is annular structure, just the oil blanket skeleton is the L type plate structure of symmetry setting along its axis direction's cross-section, the oil blanket skeleton is the metal frame.

Preferably, the groove bottom of the U-shaped annular groove is a backflow inclined plane which rises towards the direction close to the circle center.

Preferably, the outer peripheral face of the elastic base body is provided with a plurality of inner lip rings, the circle center of each inner lip ring coincides with the circle center of the elastic base body, the thickness of each inner lip ring is gradually reduced towards the direction away from the outer periphery of the elastic base body, the inner lip rings are a plurality of, and the inner lip rings are distributed at equal intervals in sequence along the axis direction of the oil seal.

A hollow shaft motor comprises a hollow shaft and an oil seal arranged on the hollow shaft, wherein the oil seal is any one of the oil seals.

In the technical scheme, the utility model provides an oil blanket of hollow shaft motor includes oil blanket skeleton and the elastic base body of parcel in the oil blanket skeleton outside, and elastic base body's outer peripheral face is the protruding structure of a plurality of evaginations, and the elastic base body inner peripheral surface is equipped with inside bellied fender dirt circle. When the oil seal is needed, the oil seal sleeve is arranged on the outer wall of the hollow shaft.

According to the description, in the hollow shaft motor provided by the application, the outer peripheral surface of the elastic base body is of the convex structures, so that the elastic base body is locally contacted with the outside, the contact area between the elastic base body and the outside is reduced, the friction force between the outer peripheral surface of the oil seal and the outside contact position is reduced, and the follow-up property is improved. Meanwhile, the inner circumferential surface of the elastic base body is provided with the dust blocking ring protruding inwards, so that impurities are prevented from entering the connecting position of the elastic base body and the hollow shaft, the abrasion of the oil seal by the impurities is reduced, and the service life of the oil seal is prolonged.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be 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 embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an oil seal according to an embodiment of the present invention;

FIG. 2 is a view of the oil seal of FIG. 1 taken in the direction A;

FIG. 3 is a view of the oil seal of FIG. 1 in the direction B;

FIG. 4 is a view of the oil seal of FIG. 1 in the direction of C;

fig. 5 is a three-dimensional structure diagram of an oil seal according to an embodiment of the present invention;

fig. 6 is a three-dimensional structure diagram of another perspective oil seal according to an embodiment of the present invention.

Wherein in FIGS. 1-6: 1-convex structure, 2-oil seal framework, 3-felt lip, 4-dust ring, 5-inner lip, 6-annular groove, 7-backflow inclined plane, 8-U-shaped annular groove and 9-elastic base body.

Detailed Description

The core of the utility model is to provide an oil blanket of hollow shaft motor, the follow-up nature of this oil blanket improves, the life extension of oil blanket simultaneously. The other core of the utility model is to provide a hollow shaft motor including above-mentioned oil blanket.

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and embodiments.

Please refer to fig. 1 to fig. 6.

In a specific embodiment, the utility model discloses hollow shaft motor's oil blanket that specific embodiment provided includes oil blanket skeleton 2 and wraps up the elastic base 9 in the oil blanket skeleton 2 outside, and elastic base 9's outer peripheral face is the protruding structure 1 of a plurality of evaginations. The convex structure 1 may be a convex arc structure. A plurality of concrete protruding structures 1 are arranged in array circumference.

The inner peripheral surface of the elastic base body 9 is provided with a dust blocking ring 4 which protrudes inwards. Specifically, the circle center of the dust blocking ring 4 coincides with the circle center of the oil seal.

The oil seal is used on a hollow shaft motor, the hollow shaft motor, a gearbox and an engine form a parallel system, and when the oil seal is needed, the oil seal is arranged on the outer wall of a hollow shaft.

As can be seen from the above description, in the hollow shaft motor provided in the embodiment of the present application, since the outer peripheral surface of the elastic base 9 is the plurality of convex structures 1, the contact surface of the oil seal is reduced, and the friction of the oil seal is reduced, so that the elastic base 9 is locally contacted with the outside, the contact area between the elastic base 9 and the outside is reduced, the friction force between the outer peripheral surface of the oil seal and the outside contact position is reduced, and the follow-up property is enhanced. Meanwhile, the inner circumferential surface of the elastic base body 9 is provided with the dust blocking ring 4 protruding inwards, and the dust blocking ring 4 is used for reducing dust falling onto the hollow shaft, so that the abrasion of the hollow shaft is reduced, and the service lives of the motor and the oil seal are prolonged.

Preferably, the protrusion structure 1 is an annular protrusion arranged around the periphery of the elastic base 9, the annular protrusion is multiple, and the multiple annular protrusions are sequentially distributed at equal intervals along the axis direction of the oil seal. In particular, it is preferred that the outer end of the annular projection is smoothly transitioned.

For the convenience of assembling the oil seal, the elastic base body 9, the convex structure 1 and the dust ring 4 are preferably of an integrally formed structure.

In one embodiment, the elastic base 9, the protruding structure 1 and the dust ring 4 are rubber bodies. Preferably, the three components are integrally formed by injection molding.

The oil seal also comprises a felt lip 3 bonded on the elastic base body 9, and the felt lip 3 is bonded at the first end of the oil seal in the axial direction. The felt has strong adsorption effect and is used for adsorbing dust. The felt is additionally arranged on the outer side of the oil seal, so that the function of adsorbing dust is achieved, the abrasion of the hollow shaft can be reduced, and the service life of the oil seal is prolonged.

In a specific embodiment, the elastic base 9 is provided with a U-shaped annular groove 8 opening to the second end, the first end and the second end are two ends disposed oppositely, an annular groove 6 is provided on the side wall of the U-shaped annular groove 8 close to the center of the circle, and the annular groove 6 is used for placing a spring ring therein. The spring ring of oil blanket can give the lip certain radial pressure for cramp the lip and make it sticiss on the hollow shaft, guarantee its leakproofness.

In a specific embodiment, the oil seal framework 2 is an annular structure, the cross section of the oil seal framework 2 along the axis direction of the oil seal framework is an L-shaped plate structure which is symmetrically arranged, and the oil seal framework 2 is a metal frame, and particularly can be a steel structure framework. The oil seal framework 2 is L-shaped and is used for fixing the whole structure, the advantage of enhancing the coaxiality of the inner diameter and the outer diameter of the oil seal is achieved, and the requirement on steel is low.

In order to enhance the effect of returning the lubricant, as shown in fig. 1, the groove bottom of the U-shaped annular groove 8 is preferably a return inclined surface 7 that rises toward the center of the circle.

On the basis of the above schemes, the outer peripheral surface of the elastic base body 9 is provided with a plurality of inner lip rings 5, the circle centers of the inner lip rings 5 coincide with the circle center of the elastic base body 9, the thickness of the inner lip rings 5 becomes thinner gradually in the direction away from the outer peripheral direction of the elastic base body 9, the inner lip rings 5 are multiple, and the inner lip rings 5 are distributed at equal intervals in sequence along the axis direction of the oil seal. Specifically, the inner lip ring 5 can be three, four and the like, the inner lip ring 5 is directly contacted with the hollow shaft to form intermittent line sealing, the contact area with the shaft is reduced, the advantage of reducing the power consumption of the motor is achieved, the sealing effect of the bearing chamber is enhanced, the inner lip ring 5 is directly contacted with the hollow shaft to form line contact with the hollow shaft, the sealing performance is strong, and the backflow effect is achieved.

The application provides a hollow shaft motor, including the hollow shaft and install the oil blanket on the hollow shaft, wherein the oil blanket is any kind of oil blanket of above-mentioned, and the aforesaid has described the specific structure about the oil blanket, and this application includes above-mentioned oil blanket, has above-mentioned technological effect equally.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

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 (10)

1. The utility model provides an oil blanket of hollow shaft motor, its characterized in that is in including oil blanket skeleton (2) and parcel elastic matrix (9) in the oil blanket skeleton (2) outside, the outer peripheral face of elastic matrix (9) is protruding structure (1) of a plurality of evaginations, elastic matrix (9) inner peripheral face is equipped with inside bellied dust ring (4).

2. The oil seal of a hollow shaft motor as claimed in claim 1, wherein the protrusion structure (1) is an annular protrusion arranged around the periphery of the elastic base body (9), and the annular protrusion is provided in plurality, and the annular protrusions are sequentially distributed at equal intervals along the axial direction of the oil seal.

3. The oil seal of a hollow shaft motor as claimed in claim 1, wherein the elastic base body (9), the raised structure (1) and the dust ring (4) are of an integrally formed structure.

4. The oil seal of a hollow shaft motor according to claim 1, wherein the elastic base body (9), the raised structure (1) and the dust ring (4) are rubber bodies.

5. The oil seal of the hollow shaft motor according to claim 1, further comprising a felt lip (3) bonded to the elastic base body (9), wherein the felt lip (3) is bonded to a first end of the oil seal in the axial direction.

6. The oil seal of the hollow shaft motor as claimed in claim 5, wherein the elastic base body (9) is provided with a U-shaped annular groove (8) which is open to the second end, the first end and the second end are two ends which are arranged oppositely, the side wall of the U-shaped annular groove (8) close to the center of the circle is provided with an annular groove (6), and the annular groove (6) is used for placing a spring ring.

7. The oil seal of the hollow shaft motor according to claim 6, wherein the oil seal framework (2) is of an annular structure, the cross section of the oil seal framework (2) along the axial direction is of a symmetrically arranged L-shaped plate structure, and the oil seal framework (2) is a metal frame.

8. The oil seal of hollow shaft motor according to claim 6, wherein the groove bottom of the U-shaped annular groove (8) is a backflow inclined surface (7) which is raised towards the center of the circle.

9. The oil seal of the hollow shaft motor as claimed in any one of claims 1 to 8, wherein a plurality of inner lip rings (5) are arranged on the outer circumferential surface of the elastic base body (9), the circle center of each inner lip ring (5) coincides with the circle center of the elastic base body (9), the thickness of each inner lip ring (5) is gradually reduced towards the direction away from the outer circumference of the elastic base body (9), the number of inner lip rings (5) is multiple, and the inner lip rings (5) are sequentially distributed at equal intervals along the axial direction of the oil seal.

10. A hollow shaft motor comprising a hollow shaft and an oil seal mounted on said hollow shaft, wherein said oil seal is according to any one of claims 1 to 9.

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