CN201781354U

CN201781354U - Sealing structure of motor end cover and casing of electric vehicle

Info

Publication number: CN201781354U
Application number: CN2010205288760U
Authority: CN
Inventors: 张唯; 罗大铖
Original assignee: Ningbo Polaris Technology Co Ltd
Current assignee: Bosch Ningbo E Scooter Motor Co Ltd
Priority date: 2010-09-10
Filing date: 2010-09-10
Publication date: 2011-03-30
Anticipated expiration: 2020-09-10

Abstract

The utility model discloses a sealing structure of a motor end cover and a casing of an electric vehicle, which is arranged at the combined part of the end cover and the casing. In addition, a stopping shoulder with a right-angled cross section is formed at the combined part in the end cover. The sealing structure is characterized in that the end cover is provided with a sealing groove which is arranged along the circumferential direction of the stopping shoulder and is inward concavely arranged on the stopping shoulder; and a sealing ring is embedded in the sealing groove, wherein the diameter of the sealing ring is matched with the size of the sealing groove. Compared with the prior art, the utility model has the advantages that a circle of sealing groove is arranged at the stooping shoulder of the end cover along the circumferential direction; the sealing groove is inward concavely arranged along the tip angle of the stopping shoulder, so that the sealing ring can achieve the effect of bidirectional seal after being embedded into the sealing groove, i.e., the sealing ring not only has the function of radial seal, but also has the function of axial seal and the sealing structure at the connecting part of the end cover and the casing is simple and easy for installation, thereby achieving better sealing effect and more excellent waterproof performance.

Description

The hermetically-sealed construction of a kind of electric vehicle motor end cap and housing

Technical field

The utility model relates to a kind of hermetically-sealed construction, particularly relates to a kind of end cap of non-brush permanent-magnet DC motor of electric vehicle and the hermetically-sealed construction of housing junction.

Background technology

After the end cap of wheel hub motor is connected on the housing, in order to prevent that water from flowing in the motor, need to guarantee electric motor end cap and the sealing of housing between the junction, prior art realizes sealing between electric motor end cap and the housing with sealing shroud, as shown in Figure 3, the structural representation that seals for the available technology adopting sealing shroud, electric motor end cap 1 ' shown in Fig. 3 has the shoulder block 11 ' of axial evagination, this shoulder block 11 ' includes first rib 111 ' that is provided with vertically respectively and second rib 112 ' that is disposed radially, and, first rib 111 ' is vertical mutually with second rib 112 ', shoulder block 11 ' is along the section of first rib, 111 ' formation and the joint portion that is connected that is end cap 1 ' and housing along the periphery that second rib 112 ' forms, be arranged with the rectangular sealing shroud 2 ' of cross section on the shoulder block 11 ', the end face of sealing shroud 2 ' and first rib 111 ' offset.Though above-mentioned hermetically-sealed construction can avoid fluid sealant to smear uneven defective, but, adopt the hermetically-sealed construction of sealing shroud can only realize that the axial end of end cap seals, when motor in running, still can be gapped between the inwall of sealing shroud 2 ' and the periphery that forms by second rib 112 ', can't guarantee radial seal well.

In order to guarantee radial seal, improve sealing property, traditional way is radially to smear sealing glue at the binding site of end cap and housing to realize thoroughly sealing, but, this sealing means cost height, complex process, to sealing glue to smear requirement very high, if sealing glue is inhomogeneous, then in motor operation course, not only cause motor working efficiency low, also be easy to cause the wearing and tearing of fluid sealant, make that the water resistance of motor is poor, have a strong impact on motor performance and useful life, therefore, await to do further improvement.

The utility model content

Technical problem to be solved in the utility model is to provide a kind of energy simple in structure and can guarantee simultaneously axially and the electric vehicle motor end cap of radial seal and the hermetically-sealed construction of housing at above-mentioned prior art present situation.

The utility model solves the technical scheme that above-mentioned first technical problem adopted: the hermetically-sealed construction of this electric vehicle motor end cap and housing, the sealing structure is arranged at the joint portion of described end cap and housing, and, described end cap is formed with the rectangular shoulder block of cross section in described joint portion, it is characterized in that: described end cap offers on described shoulder block along the circumferential distribution of this shoulder block and the seal groove that sets to the concave, and is embedded with the suitable sealing ring of diameter and sealing groove size in the described seal groove.

As preferably, described sealing ring is that cross section is O shape and radius is rubber ring or the plastic ring of R.

For after guaranteeing end cap and housing being connected, the axial of both connecting portions seals with radially can both fully realizing, the cross section of described seal groove takes the shape of the letter U, and the degree of depth that described sealing ring embeds in the described seal groove is L, and the scope of described degree of depth L is: R≤L≤1.2R.The degree of depth that sealing ring embeds in the seal groove should not be too shallow or too dark, and the slippage from seal groove easily of the too shallow then sealing ring of insert depth influences end cap and housing directly assembles; Insert depth too deeply then sealing ring can't contact with housing effectively, and make end cap and housing that the back is installed both will have the space between the joint portion, and sealing effectiveness is relatively poor.

In order to guarantee the uniformity of radial and axial sealing, as further preferred, the angle between the central axis of described seal groove openend and the horizontal plane of described shoulder block is 45 degree.

Compared with prior art, advantage of the present utility model is: the shoulder block place at end cap circumferentially offers a circle seal groove along the edge, because being the wedge angle along shoulder block, seal groove sets to the concave, after in seal groove, being embedded sealing ring, make the sealing circle can play the effect of two way seal, can play the effect of radial seal, can play the effect of axial seal again, make that end cap and housing are simple at the hermetically-sealed construction of connecting portion, install easily, thereby reach the water resistance of better sealing effectiveness and Geng Jia.

Description of drawings

Fig. 1 is the motor end cap structure schematic diagram of the utility model embodiment.

Fig. 2 is an I portion partial enlarged drawing shown in Figure 1.

Fig. 3 is the electric motor end cap sealed structural representation of prior art.

Embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

As Fig. 1, shown in Figure 2, be specific embodiment of the utility model, the sealing structure is arranged at the joint portion that the end cap 1 of electric vehicle motor is connected with housing, usually, end cap 1 cross-sectional structure of electric vehicle motor as shown in Figure 1, housing is socketed in the stub end of this end cap 1, wherein, end cap 1 is formed with the rectangular shoulder block of cross section 2 in the joint portion, shoulder block 2 include first rib 21 that vertical direction is provided with and perpendicular to this first rib 21 be provided with and along end-cover axle to second rib 22 that is provided with, end cap 1 offers on shoulder block 2 along the circumferential distribution of this shoulder block 2 and to the seal groove 3 of the wedge angle indent of this shoulder block 2, is embedded with diameter and the suitable sealing rings 4 of sealing groove 3 sizes in the seal groove 3.

Wherein, the cross section of seal groove 3 takes the shape of the letter U, angle between second rib 22 of the central axis of seal groove 3 openends and shoulder block is T, the size of this angle T is the best with 45 degree, can guarantee when end cap is connected with housing that sealing ring is with respect to the uniformity of axial and radial seal this moment, sealing ring 4 is O shape for cross section and radius is rubber ring or the plastic ring of R, the degree of depth that sealing ring 4 embeds in the seal groove 3 is L, and the scope of this insert depth L is: R≤L≤1.2R is best with L=1.2R.

Present embodiment is by processing seal groove on the shoulder block (joint portion of end cap and housing) of end cap, in seal groove, place elastic seal ring, the position that sealing ring is exposed to outside the seal groove can contact with housing, when guaranteeing end cap and housing axial seal, also realized the radial seal of end cap and housing, can realize two way seal by a sealing ring, simple in structure, processing ease, and, processing cost is low, good sealing effect, end cap can reach the IP55 level with classification of waterproof after housing is connected, has greatly improved the functional reliability and the fail safe of electric vehicle motor.

Claims

1. the hermetically-sealed construction of electric vehicle motor end cap and housing, the sealing structure is arranged at the joint portion of described end cap and housing, and, described end cap is formed with the rectangular shoulder block of cross section in described joint portion, it is characterized in that: described end cap offers on described shoulder block along the circumferential distribution of this shoulder block and the seal groove that sets to the concave, and is embedded with the suitable sealing ring of diameter and sealing groove size in the described seal groove.

2. the hermetically-sealed construction of electric vehicle motor end cap according to claim 1 and housing is characterized in that: described sealing ring is that cross section is O shape and radius is rubber ring or the plastic ring of R.

3. the hermetically-sealed construction of electric vehicle motor end cap according to claim 2 and housing is characterized in that: the cross section of described seal groove takes the shape of the letter U, and the degree of depth that described sealing ring embeds in the described seal groove is L, and the scope of described degree of depth L is: R≤L≤1.2R.

4. according to the hermetically-sealed construction of claim 1 or 2 or 3 described electric vehicle motor end caps and housing, it is characterized in that: the angle between the central axis of described seal groove openend and the horizontal plane of described shoulder block is 45 degree.