CN221278442U - Special-shaped sealing ring and direct current motor - Google Patents

Abstract

The utility model discloses a special-shaped sealing ring, which is of an annular structure, wherein the cross section of the special-shaped sealing ring is non-circular along the thickness direction of the special-shaped sealing ring, and the special-shaped sealing ring comprises: the inner surface is provided with a first convex part, the outer surface is provided with a second convex part, the first convex part and the second convex part are symmetrically arranged, the upper surface comprises a first cambered surface, and the lower surface comprises a second cambered surface; when being extruded, the first cambered surface can become a first plane, the second cambered surface can become a second plane, the inner surface can become a third plane, and the outer surface can become a fourth plane. The utility model can ensure radial sealing, realize axial filling and apply pressure to the bearing cover in the axial direction. The utility model also provides a direct current motor comprising the special-shaped sealing ring.

Description

Special-shaped sealing ring and direct current motor

Technical Field

The utility model relates to the field of direct current motors, in particular to a special-shaped sealing ring and a direct current motor.

Background

In the use process of the direct current motor, external media such as water or oil stains and the like should be prevented from entering the motor, so that the motor is prevented from being burnt out and the like, and the direct current motor needs to be sealed.

The sealing means adopted at present mainly comprises the steps that an O-shaped sealing ring 1' is arranged in a cavity formed by a shell, a connecting cover and a bearing cover of the direct current motor, the cross section of the O-shaped sealing ring is circular (refer to figure 1), but the O-shaped sealing ring only has the effect of radial sealing (namely, the Y direction shown in figure 1), the O-shaped sealing ring cannot be fully filled in the axial direction (namely, the thickness direction of the O-shaped sealing ring is also the X direction shown in figure 1), and therefore elastic force cannot be given out in the axial direction to press the bearing cover, so that the bearing cover moves in the axial direction under the low temperature condition of a vibration experiment, and copper wires of the direct current motor are pulled, and the copper wires of the direct current motor are broken, so that the motor is out of function.

Disclosure of utility model

The utility model aims to solve the problem that an O-shaped sealing ring cannot be completely filled in the axial direction and cannot give elastic force in the axial direction to press a plastic bearing cover. The utility model provides a special-shaped sealing ring and a direct current motor, which can ensure radial sealing, realize axial filling and apply pressure to a bearing cover in the axial direction.

In order to solve the technical problems, the embodiment of the utility model discloses a special-shaped sealing ring, wherein the special-shaped sealing ring is of an annular structure, the cross section of the special-shaped sealing ring is non-circular along the thickness direction of the special-shaped sealing ring, and the special-shaped sealing ring comprises: an inner surface and an outer surface which are oppositely arranged along the radial direction of the special-shaped sealing ring, and an upper surface and a lower surface which are oppositely arranged along the thickness direction, wherein,

The inner surface is provided with a first convex part, the outer surface is provided with a second convex part, the first convex part and the second convex part are symmetrically arranged, the upper surface comprises a first cambered surface, and the lower surface comprises a second cambered surface;

When pressed, the first cambered surface can become a first plane, the second cambered surface can become a second plane, the inner surface can become a third plane, and the outer surface can become a fourth plane.

By adopting the technical scheme, through setting up first cambered surface, second cambered surface, first convex part and second convex part for the dysmorphism sealing washer is when receiving the extrusion, and first cambered surface can become first plane, and the second cambered surface can become the second plane, and the internal surface can become the third plane, and the surface can become the fourth plane, finally makes the dysmorphism sealing washer can realize radial seal and axial packing and give the bearing cap pressure in the axial, simple structure is stable but the effect is showing.

According to another specific embodiment of the utility model, the embodiment of the utility model discloses a special-shaped sealing ring, and the first cambered surface is respectively and smoothly connected with the inner surface and the outer surface.

According to another specific embodiment of the utility model, the embodiment of the utility model discloses a special-shaped sealing ring, and the second cambered surface is respectively and smoothly connected with the inner surface and the outer surface.

According to another embodiment of the present utility model, a special-shaped seal ring is disclosed in an embodiment of the present utility model, wherein the first protrusion is disposed at a center position of the inner surface in the thickness direction, and the second protrusion is disposed at a center position of the outer surface in the thickness direction.

According to another specific embodiment of the utility model, the embodiment of the utility model discloses a special-shaped sealing ring which is integrally formed.

By adopting the technical scheme, through the integrated molding of the die, additional processing is not needed, the cost is controllable, and the quality risk is low.

According to another specific embodiment of the utility model, the embodiment of the utility model discloses a special-shaped sealing ring which is made of rubber.

By adopting the technical scheme, the special-shaped sealing ring can deform when being extruded.

The embodiment of the utility model also discloses a direct current motor, which comprises a shell, a connecting cover, a bearing cover and the special-shaped sealing ring in any embodiment, wherein the connecting cover and the bearing cover are arranged up and down along the thickness direction, the shell surrounds the connecting cover and the bearing cover, the shell, the connecting cover and the bearing cover jointly enclose an annular cavity, the cross section of the cavity is rectangular along the thickness direction, the special-shaped sealing ring is arranged in the cavity and is extruded by the cavity, and the first plane, the second plane, the third plane and the fourth plane of the special-shaped sealing ring are respectively attached to the cavity wall of the cavity.

By adopting the technical scheme, the cavity is set to be rectangular, so that the cavity can be filled with the special-shaped sealing ring after being extruded, when the special-shaped sealing ring is extruded by the shell and the connecting cover along the radial direction, the inner surface becomes a third plane, and the outer surface becomes a fourth plane, so that radial sealing is realized; when the special-shaped sealing ring is extruded by the bearing cover and the connecting cover along the thickness direction, the first cambered surface is changed into a first plane, the second cambered surface is changed into a second plane, axial (namely the thickness direction) filling is realized, the structure is simple and stable, the effect is obvious, and meanwhile, the bearing cover is given with pressure in the axial direction, so that axial movement of the bearing cover under the low-temperature condition of a vibration experiment can be avoided, a copper wire of a direct current motor is prevented from being pulled, and the phenomenon that the motor is out of function due to breakage of the copper wire of the direct current motor is avoided.

According to another specific embodiment of the utility model, the cavity wall of the cavity comprises an inner wall of the shell, an upper wall and a side wall of the connecting cover and a top wall of the bearing cover, wherein the third plane is attached to the side wall of the connecting cover, and the fourth plane is attached to the inner wall of the shell; the first plane is attached to the upper wall of the connecting cover, and the second plane is attached to the top wall of the bearing cover.

By adopting the technical scheme, when the special-shaped sealing ring is extruded by the shell and the connecting cover along the radial direction, the inner surface becomes a third plane and is attached to the side wall of the connecting cover, and the outer surface becomes a fourth plane and is attached to the inner wall of the shell, so that radial sealing is realized; when the special-shaped sealing ring is extruded by the bearing cover and the connecting cover along the thickness direction, the first cambered surface becomes a first plane and is attached to the upper wall of the connecting cover, and the second cambered surface becomes a second plane and is attached to the top wall of the bearing cover, so that axial (namely the thickness direction) filling is realized.

According to another embodiment of the present utility model, a dc motor is disclosed in the embodiment of the present utility model, wherein the first plane is smoothly connected to the third plane and the fourth plane, respectively, and the second plane is smoothly connected to the third plane and the fourth plane, respectively.

Drawings

FIG. 1 illustrates a cross-sectional view of an O-ring seal provided by some embodiments;

Fig. 2 shows a perspective view of the special-shaped sealing ring provided by the embodiment of the utility model, wherein the special-shaped sealing ring is not extruded;

FIG. 3 shows a cross-sectional view of a profiled seal ring provided by an embodiment of the utility model, when the profiled seal ring is not compressed;

FIG. 4 shows an enlarged view of a cross section of a profiled seal ring of an embodiment of the utility model, when the profiled seal ring is not compressed;

Fig. 5 shows a cross-sectional view of a dc motor according to an embodiment of the present utility model, in which a special-shaped seal ring is not assembled;

fig. 6 shows a cross-sectional view of a dc motor according to an embodiment of the present utility model, in which a profiled sealing ring is compressed;

Fig. 7 shows an enlarged view of region a of fig. 6, when the profiled sealing ring is compressed.

Detailed Description

Further advantages and effects of the present utility model will become apparent to those skilled in the art from the disclosure of the present specification, by describing the embodiments of the present utility model with specific examples. While the description of the utility model will be described in connection with the preferred embodiments, it is not intended to limit the inventive features to the implementation. Rather, the purpose of the utility model described in connection with the embodiments is to cover other alternatives or modifications, which may be extended by the claims based on the utility model. The following description contains many specific details for the purpose of providing a thorough understanding of the present utility model. The utility model may be practiced without these specific details. Furthermore, some specific details are omitted from the description in order to avoid obscuring the utility model. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

It should be noted that in this specification, like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present embodiment, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", "inner", "bottom", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship in which the inventive product is conventionally put in use, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the present utility model.

The terms "first," "second," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.

In the description of the present embodiment, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present embodiment can be understood in a specific case by those of ordinary skill in the art.

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings.

Referring to fig. 2 and 3, the present application provides a special-shaped sealing ring 1, the special-shaped sealing ring 1 is in a ring-shaped structure (as shown in fig. 2), the cross section of the special-shaped sealing ring 1 is non-circular (as shown in fig. 3 and 4) along the thickness direction (i.e. the X direction shown in fig. 3) of the special-shaped sealing ring 1, and the special-shaped sealing ring 1 comprises: an inner surface 12 and an outer surface 13 disposed opposite to each other in the radial direction (i.e., Y direction shown in fig. 3) of the shaped seal ring 1, and an upper surface 10 and a lower surface 11 disposed opposite to each other in the thickness direction (i.e., X direction shown in fig. 3).

Illustratively, referring to fig. 2 to 4, the inner surface 12 is provided with a first protrusion 121, the outer surface 13 is provided with a second protrusion 131, the first protrusion 121 and the second protrusion 131 are symmetrically arranged, the upper surface 10 includes a first arc surface 101, and the lower surface 11 includes a second arc surface 111; referring to fig. 7, when pressed, the first cambered surface 101 can become a first plane 1011, the second cambered surface 111 can become a second plane 1111, the inner surface 12 can become a third plane 122, and the outer surface 13 can become a fourth plane 132.

By way of example, referring to fig. 2, the special-shaped sealing ring 1 is integrally formed by a mold, no additional processing is needed, the cost is controllable, the quality risk is low, and the special-shaped sealing ring 1 is made of rubber, so that the special-shaped sealing ring can deform when being extruded.

Illustratively, referring to fig. 2-4, the first arcuate surface 101 is smoothly continuous with the inner and outer surfaces 12, 13, respectively, and the second arcuate surface 111 is smoothly continuous with the inner and outer surfaces 12, 13, respectively. The first protruding portion 121 is provided at a central position of the inner surface 12 in the thickness direction (i.e., X direction shown in fig. 3), and the second protruding portion 131 is provided at a central position of the outer surface 13 in the thickness direction (i.e., X direction shown in fig. 3).

The specific positions and thicknesses of the first protrusion 121 and the second protrusion 131 are not particularly limited, as long as the distance between the third plane 122 and the fourth plane 132 is equal to the width of the cavity 23 (see fig. 7) described later when the inner surface 12 becomes the third plane 122 after extrusion and the outer surface 13 becomes the fourth plane 132 after extrusion, and for example, the first protrusion 121 may be provided at the center position of the inner surface 12 and the second protrusion 131 may be provided at the center position of the outer surface 13, or may be provided at a position shifted up or down from the center as shown in the present embodiment.

Referring to fig. 5 to 7, the present application further provides a dc motor 2, which includes a housing 20, a connection cover 21, a bearing cover 22, and the above-mentioned special-shaped sealing ring 1, wherein the connection cover 21 and the bearing cover 22 are disposed up and down in a thickness direction (i.e., an X direction shown in fig. 7), the housing 20 surrounds the connection cover 21 and the bearing cover 22, and referring to fig. 5, the housing 20 includes an inner wall 201, the connection cover 21 includes an upper wall 211 and a side wall 212, the bearing cover 22 includes a top wall 221, and the inner wall 201 of the housing 20, the upper wall 211 of the connection cover 21, the side wall 212 of the connection cover 21, and the top wall 221 of the bearing cover 22 together enclose a molding cavity 23.

For example, referring to fig. 7 in combination with fig. 5, the special-shaped sealing ring 1 is located in the cavity 23, the cavity 23 is annular, and the section of the cavity 23 is rectangular (as shown in fig. 5) along the thickness direction (i.e., the X direction shown in fig. 7), and the section of the cavity 23 is rectangular-like since the connection point between the inner wall 211 and the side wall 212 of the connection cover 21 may not be right-angled during the manufacturing process of the workpiece of the connection cover 21.

As an example, referring to fig. 6 and 7 in combination with fig. 2 and 3, during the assembly, first, the connecting cap 21 is capped over the bearing cap 22 in the X direction shown in fig. 7, the shaped seal ring 1 is attached between the upper wall 211 of the connecting cap 21, the side wall 212 of the connecting cap 21 and the top wall 221 of the bearing cap 22, then the housing 20 is wrapped around the connecting cap 21 and the bearing cap 22, at this time, the shaped seal ring 1 is pressed by the housing 20 and the connecting cap 21 in the radial direction (i.e., in the Y direction shown in fig. 7), i.e., at this time, the housing 20 presses the outer surface 13 of the shaped seal ring 1 attached thereto inwards in the Y direction, and at the same time, the side wall 212 of the connecting cap 21 presses the inner surface 12 of the shaped seal ring 1 attached thereto outwards in the Y direction, so that the inner surface 12 becomes the third plane 122 and the side wall 212 of the connecting cap 21 is attached, the outer surface 13 becomes the fourth plane 132 and the inner wall 201 of the housing 20 is attached, at the same time, the thickness of the shaped seal ring 1 is thickened, i.e., the first cambered surface 101 and the second cambered surface 111 are separated from each other in the X direction.

With continued reference to fig. 6 and 7, when the special-shaped sealing ring 1 is pressed by the bearing cover 22 and the connecting cover 21 along the thickness direction (i.e. along the X direction shown in fig. 7), the first cambered surface 101 becomes the first plane 1011 and is attached to the upper wall 211 of the connecting cover 21, the second cambered surface 111 becomes the second plane 1111 and is attached to the top wall 221 of the bearing cover 22, so that the special-shaped sealing ring 1 is finally filled in the cavity 23, and radial (i.e. the Y direction shown in fig. 7) sealing and axial (i.e. the thickness direction, the X direction shown in fig. 7) filling are realized, and meanwhile, the bearing cover pressure is applied in the axial direction, so that the bearing cover can be prevented from moving in the axial direction under the low temperature condition of the vibration experiment, and the copper wire of the direct current motor is prevented from being pulled, and the copper wire of the direct current motor is prevented from breaking, so that the motor is prevented from losing function.

Illustratively, referring to fig. 7, the first plane 1011 and the third and fourth planes 122 and 132 are smoothly connected by circular arcs, respectively, and the second plane 1111 and the third and fourth planes 122 and 132 are smoothly connected by circular arcs, respectively.

While the utility model has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a further detailed description of the utility model with reference to specific embodiments, and it is not intended to limit the practice of the utility model to those descriptions. Various changes in form and detail may be made therein by those skilled in the art, including a few simple inferences or alternatives, without departing from the spirit and scope of the present utility model.

Claims (9)

1. The utility model provides a special-shaped sealing washer, its characterized in that, special-shaped sealing washer is annular structure, follows the thickness direction of special-shaped sealing washer, the cross section of special-shaped sealing washer is non-circular, special-shaped sealing washer includes: an inner surface and an outer surface which are oppositely arranged along the radial direction of the special-shaped sealing ring, and an upper surface and a lower surface which are oppositely arranged along the thickness direction, wherein,

The inner surface is provided with a first convex part, the outer surface is provided with a second convex part, the first convex part and the second convex part are symmetrically arranged, the upper surface comprises a first cambered surface, and the lower surface comprises a second cambered surface;

When pressed, the first cambered surface can become a first plane, the second cambered surface can become a second plane, the inner surface can become a third plane, and the outer surface can become a fourth plane.

2. The contoured seal of claim 1, wherein said first arcuate surface is smoothly continuous with said inner surface and said outer surface, respectively.

3. The contoured seal of claim 1, wherein said second arcuate surface is smoothly continuous with said inner surface and said outer surface, respectively.

4. The shaped seal ring of claim 1, wherein said first protrusion is disposed at a center of said inner surface in said thickness direction and said second protrusion is disposed at a center of said outer surface in said thickness direction.

5. The profiled sealing ring as defined in claim 1 wherein the profiled sealing ring is integrally formed.

6. The profiled sealing ring as defined in claim 1 wherein the profiled sealing ring is a rubber material.

7. The direct current motor is characterized by comprising a shell, a connecting cover, a bearing cover and the special-shaped sealing ring according to any one of claims 1 to 6, wherein the connecting cover and the bearing cover are arranged up and down in the thickness direction, the shell surrounds the connecting cover and the bearing cover, the shell, the connecting cover and the bearing cover jointly enclose into an annular cavity, the cross section of the cavity is rectangular in the thickness direction, the special-shaped sealing ring is arranged in the cavity and is extruded by the cavity, and the first plane, the second plane, the third plane and the fourth plane of the special-shaped sealing ring are respectively attached to the cavity wall of the cavity.

8. The direct current motor according to claim 7, wherein a cavity wall of the cavity includes an inner wall of the housing, an upper wall and a side wall of the connection cover, and a top wall of the bearing cover, wherein the third plane is attached to the side wall of the connection cover, and the fourth plane is attached to the inner wall of the housing; the first plane is attached to the upper wall of the connecting cover, and the second plane is attached to the top wall of the bearing cover.

9. The direct current motor of claim 7, wherein said first plane is smoothly connected to said third plane and said fourth plane, respectively, and said second plane is smoothly connected to said third plane and said fourth plane, respectively.