CN215933910U

CN215933910U - Terminal sealing structure and starter stator

Info

Publication number: CN215933910U
Application number: CN202121772091.2U
Authority: CN
Inventors: 李想; 刘永乾; 李百慧
Original assignee: Prestolite Electric Weifang Ltd; Prestolite Electric Beijing Ltd
Current assignee: Prestolite Electric Weifang Ltd; Prestolite Electric Beijing Ltd
Priority date: 2021-07-30
Filing date: 2021-07-30
Publication date: 2022-03-01
Anticipated expiration: 2031-07-30

Abstract

The utility model discloses a terminal post sealing structure and a starter stator, belonging to the technical field of starter sealing, wherein the terminal post sealing structure comprises a terminal post penetrating through a wire outlet hole on a shell and a sealing ring arranged between the terminal post and the wire outlet hole; the inner ring surface of the sealing ring is an inward-convex cambered surface, the outer ring surface of the sealing ring is an outward-convex cambered surface, and the sealing ring is in interference fit with the wiring terminal and the wire outlet hole; the starter stator includes stator casing and installs iron core and the winding in stator casing, and the big line outlet end of stator casing is provided with foretell terminal post seal structure, and this design not only can satisfy IPX 7's sealing grade requirement, even do not take place to leak under the internal and external pressure difference is 6PSI pressure for the starter can match the use under more complicated and abominable operating mode.

Description

Terminal sealing structure and starter stator

Technical Field

The utility model belongs to the technical field of starter sealing, and particularly relates to a terminal sealing structure and a starter stator.

Background

With the rapid development of vehicle industry and the complexity of various application conditions, such as application environments of high temperature, high humidity, wading, mud and the like, the sealing grade requirements of vehicles, especially vehicle electrical components, are more and more strict. The sealing reliability of the starter is self-evident as a core component on the vehicle engine. With the development of sealing technology in the starter industry, some products can meet the sealing requirement of IPX7, but the sealing performance of the IPX7 grade cannot be met by the IPX7 sealing grade for certain specific applications and customers with higher sealing grade requirements. The 6PSI protection level presents a formidable challenge to the seal reliability of the starter. The stator big line outlet end is one of the weak points of starter sealing due to the special structure, and is important for the sealing reliability of a starter motor system and a whole machine.

The existing starter stator big line outlet end sealing structure is shown in fig. 1 and fig. 2, a special-shaped sealing ring 6 is used, when the sealing ring 6, a binding post 3 and a stator shell outlet hole are matched, the rubber length for sealing is short, and the sealing requirement of a high grade is difficult to meet. Once water enters the stator cavity, a short circuit occurs in a starter motor system, and the starter fails, so that customer complaints and economic compensation are caused.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: the terminal post sealing structure and the starter stator are good in sealing effect and capable of meeting the sealing grade requirement that the internal and external pressure difference of the whole starter is 6 PSI.

In order to solve the technical problems, the technical scheme of the utility model is as follows:

a terminal sealing structure comprises a terminal penetrating through a wire outlet hole in a shell and a sealing ring arranged between the terminal and the wire outlet hole, wherein an insulating paper pad and an insulating pad which are respectively positioned on the inner side and the outer side of the shell are sleeved on the terminal, and the end surfaces on the two sides of the sealing ring are respectively contacted with the insulating paper pad and the insulating pad; the inner ring surface of the sealing ring is an inward-convex arc surface, the outer ring surface of the sealing ring is an outward-convex arc surface, and the sealing ring is in interference fit with the wiring terminal and the wire outlet hole.

Further, the sealing ring is of a symmetrical structure.

Further, the sealing ring is a rubber sealing ring.

Furthermore, the insulating pad is located the casing outside and is provided with the axial bulge loop, the axial bulge loop stretch into in the outlet port with a side end face contact of sealing washer.

Furthermore, a first metal gasket is sleeved on the wiring terminal between one end of the wiring terminal in the shell and the insulating paper gasket.

Furthermore, a second metal gasket is sleeved on the wiring terminal between one end of the wiring terminal outside the casing and the insulating pad.

Furthermore, the end part of the binding post, which is positioned outside the shell, is sleeved with a lug plate.

Furthermore, the end part of the binding post outside the shell is fastened with the lug through riveting.

A starter stator comprises a stator shell, and an iron core and a winding which are arranged in the stator shell, wherein the wiring terminal sealing structure is arranged at a large-wire outlet end of the stator shell.

After the technical scheme is adopted, the utility model has the beneficial effects that:

the terminal sealing structure comprises a terminal penetrating through a wire outlet hole on the shell and a sealing ring arranged between the terminal and the wire outlet hole, wherein the terminal is sleeved with an insulating paper pad and an insulating pad which are respectively positioned at the inner side and the outer side of the shell, and the end surfaces at the two sides of the sealing ring are respectively contacted with the insulating paper pad and the insulating pad; the inner ring surface of the sealing ring is an inward convex arc surface, the outer ring surface of the sealing ring is an outward convex arc surface, interference fit is achieved between the sealing ring and the wiring terminal and between the sealing ring and the wiring hole, the contact length between the inner ring surface of the sealing ring and the surface of the wiring terminal and between the outer ring surface and the wiring hole can be correspondingly increased, the length of the sealing effect is increased, and the sealing effect is better.

The starter stator comprises a stator shell, and an iron core and a winding which are arranged in the stator shell, wherein the wiring terminal sealing structure is arranged at the large-wire outlet end of the stator shell, so that the condition that water enters an inner cavity of the stator to cause a short circuit of a starter motor system and further cause the failure of the starter can be avoided.

The wiring terminal sealing structure and the starter stator solve the problem that the sealing grade of a stator large-wire outlet end in the prior art is not high enough, the sealing structure can meet the more rigorous matching application environment through the sealing grade requirement of IPX7 and the sealing requirement of 6PSI, and compared with the design of a sealing ring in the prior art, the stator assembly of the starter is simple in structure and easy to assemble.

Drawings

FIG. 1 is a schematic view of a stator big wire terminal post seal structure in the prior art;

FIG. 2 is a schematic view of the seal ring of FIG. 1;

FIG. 3 is a schematic structural view of the terminal sealing structure of the present invention;

FIG. 4 is a schematic view of the seal ring of FIG. 2;

FIG. 5 is a schematic view of the starter stator of the present invention;

in the figure, 1-terminal sealing structure, 2-machine shell, 3-terminal, 4-first metal gasket, 5-insulating paper gasket, 6-sealing ring, 61-end surface, 62-inner ring surface, 63-outer ring surface, 7-insulating gasket, 71-axial convex ring, 8-second metal gasket, 9-terminal piece and 10-stator machine shell.

Detailed Description

The utility model is further illustrated with reference to the following figures and examples.

All directions referred to in the present specification are based on the drawings, and represent relative positional relationships only, and do not represent absolute positional relationships.

The first embodiment is as follows:

as shown in fig. 3 and 4 together, a terminal sealing structure comprises a terminal 3 penetrating through a wire outlet on a casing 2, and further comprises a sealing ring 6 arranged between the terminal 3 and the wire outlet, wherein the terminal 3 is sleeved with an insulating paper pad 5 and an insulating pad 7 which are respectively positioned on the inner side and the outer side of the casing 2, and the end surfaces 61 on the two sides of the sealing ring 6 are respectively contacted with the insulating paper pad 5 and the insulating pad 7. The inner ring surface 62 of the sealing ring 6 is an inward convex cambered surface, the outer ring surface 63 of the sealing ring 6 is an outward convex cambered surface, and the sealing ring 6 is in interference fit with the wiring terminal 3 and the wire outlet hole.

As shown in fig. 4, the sealing ring 6 has a symmetrical structure, and the sealing ring 6 in this embodiment is made of rubber, so that the sealing ring has good compression performance, a simple structure and high yield, is suitable for mass production, can be matched and applied in a wading, high-temperature and high-humidity environment, and widens the application range of products.

As shown in fig. 3, the insulating pad 7 is located outside the casing 2 and is provided with an axial convex ring 71, and the axial convex ring 71 extends into the outlet hole and contacts with one side end surface 61 of the sealing ring 6. The insulating pad 7 is made of plastic to prevent the electric conduction between the binding post 3 and the casing 2.

As shown in fig. 3, a first metal gasket 4 is sleeved on the terminal 3 between one end of the terminal 3 located in the casing 2 and the insulating paper gasket 5. And a second metal gasket 8 is sleeved on the binding post 3 between one end of the binding post 3 positioned outside the shell 2 and the insulating pad 7. The first metal gasket 4 and the second metal gasket 8 press the insulating paper gasket 5 and the insulating gasket 7 respectively, so that the contact area is increased, and the insulating paper gasket 5 and the insulating gasket 7 are stressed uniformly.

As shown in fig. 3, the terminal 3 is sleeved with a lug 9 at the end outside the housing 2. The end part of the binding post 3 outside the shell 2 is fastened with the lug plate 9 by riveting. In the assembling process, two end faces 61 of the sealing ring 6 are axially extruded, and the inner ring face 62 and the outer ring face 63 are extruded and deformed, so that the matching length of the wire outlet hole of the stator casing 10 is increased, the sealing effect is improved, and the 6PSI pressure test can be performed through the sealing ring. In actual use, the volume of the sealing ring 6 can account for 90% of the volume of the cavities of the insulating paper pad 5 and the insulating pad 7, and the filling rate requirement and the sealing requirement are met.

Example two:

as shown in fig. 5, a starter stator includes a stator housing 10, and an iron core and a winding installed in the stator housing 10, wherein a terminal sealing structure 1 in the first embodiment is provided at a large-wire outlet end of the stator housing 10. The starter can effectively prevent water from entering the inner cavity of the stator, prevent the short circuit of a starter motor system and further prevent the starter from losing efficacy, and prolong the service life of the starter.

According to the terminal sealing structure and the starter stator, the sealing ring is arranged between the terminal and the shell wire outlet hole, the inner ring surface of the sealing ring is an inward-convex arc surface, the outer ring surface of the sealing ring is an outward-convex arc surface, when the insulating paper pad and the insulating pad are subjected to external force to respectively extrude the two side end surfaces of the sealing ring, the contact length between the inner ring surface of the sealing ring and the surface of the terminal and between the outer ring surface of the sealing ring and the wire outlet hole can be correspondingly increased, the length of the sealing effect is increased, and the sealing effect is better.

While specific embodiments of the utility model have been described above, it will be understood by those skilled in the art that the described embodiments are only some, and not all, of the present invention, which is presented by way of example only, and the scope of the utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to the embodiments without any inventive effort, and such changes and modifications fall within the scope of the present invention.

Claims

1. A terminal sealing structure comprises a terminal penetrating through a wire outlet hole in a shell, and is characterized by further comprising a sealing ring arranged between the terminal and the wire outlet hole, wherein an insulating paper pad and an insulating pad which are respectively positioned on the inner side and the outer side of the shell are sleeved on the terminal, and the end surfaces on the two sides of the sealing ring are respectively contacted with the insulating paper pad and the insulating pad; the inner ring surface of the sealing ring is an inward-convex arc surface, the outer ring surface of the sealing ring is an outward-convex arc surface, and the sealing ring is in interference fit with the wiring terminal and the wire outlet hole.

2. The terminal sealing structure according to claim 1, wherein the seal ring is of a symmetrical structure.

3. The terminal sealing structure according to claim 2, wherein the seal ring is a rubber seal ring.

4. The terminal sealing structure according to claim 1, wherein the insulating pad is located outside the housing and is provided with an axial convex ring, and the axial convex ring extends into the outlet hole and contacts with one side end face of the sealing ring.

5. The terminal sealing structure according to claim 1, wherein a first metal gasket is sleeved on the terminal between one end of the terminal located in the casing and the insulating paper pad.

6. The terminal sealing structure according to claim 5, wherein a second metal gasket is sleeved on the terminal between one end of the terminal located outside the housing and the insulating pad.

7. The terminal sealing structure according to claim 6, wherein an end portion of the terminal located outside the housing is fitted with a lug.

8. The terminal sealing structure according to claim 7, wherein the terminal is fastened by caulking between an end portion of the terminal located outside the housing and the terminal lug.

9. A starter stator comprising a stator case, and an iron core and a winding mounted in the stator case, wherein a large-wire outlet end of the stator case is provided with the terminal sealing structure according to any one of claims 1 to 8.