CN213519402U

CN213519402U - Variable diameter's bolt insulator cap structure

Info

Publication number: CN213519402U
Application number: CN202022825725.8U
Authority: CN
Inventors: 朱嘉伟; 周庆锡; 陈小平
Original assignee: Chongqing Changan New Energy Automobile Technology Co Ltd
Current assignee: Deep Blue Automotive Technology Co ltd
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2021-06-22
Anticipated expiration: 2030-11-30

Abstract

The utility model belongs to the technical field of the insulating protection of car power battery system main relay, concretely relates to but variable diameter's bolt insulating cap structure. The structure has small volume, simple structure and variable diameter, and comprises a bolt end head accommodating cavity and a skirt edge formed by extending the edge of an opening of a cavity; the inner surface of the bolt end containing cavity is provided with a groove and a protrusion. The bolt end accommodating cavity is provided with a groove and a bulge, so that the bolt end with different sizes can be fixed, and the bolt end can be reliably used without loosening. The skirt edge is designed into a cambered disc shape or a rectangular structure and is used for shielding conductive structures such as a bolt flange plate, a copper bar end and the like, and the mounting position is fully covered.

Description

Variable diameter's bolt insulator cap structure

Technical Field

The utility model belongs to the technical field of the insulating protection of car power battery system main relay, concretely relates to but variable diameter's bolt insulating cap structure.

Background

The high-voltage loop of the new energy automobile power battery system is generally formed by combining the monomer battery cells in series and parallel, and the voltage of the common product in the market can reach 300-800V. According to GB 18384-.

In the design of a high-voltage loop of the conventional power battery system, the positive and negative poles of a main relay are generally insulated and protected in the following two ways. The high-voltage box structure of the power battery system is characterized in that the main relays are intensively arranged in the high-voltage box, and the upper cover and the lower cover of the plastic high-voltage box are designed to isolate the main relays, the copper bars and the like, so that the positive pole and the negative pole of the main relays are insulated and protected. The design scheme needs to intensively arrange parts such as the main relay and the like, is inflexible in arrangement and needs to occupy larger space. And secondly, the insulating cap and the insulating frame cover the copper bar and the end of the bolt so as to achieve the purpose of insulating protection as described in CN201921645629.6 Power leading-out component and Battery Module. This kind of design to the bolt end of equidimension not, need design the insulating cover, the insulating frame of different specifications, does not realize the general of spare part, and when the bolt end of equidimension coexisted, was difficult for discernment, distinguishes insulating cap, insulating cover size, had the wrong dress risk, influences production beat, product functionality and reliability.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problems that the existing scheme of the upper cover of the high-voltage electrical appliance box is inflexible in arrangement and large in occupied space; and the insulating cap scheme can not realize the universal insulating caps of the bolt ends with different sizes, and has the defect of wrong installation risk.

The technical scheme of the utility model is a variable diameter bolt insulating cap structure, which comprises a bolt end containing cavity and a skirt edge formed by extending the edge of the cavity opening;

the inner surface of the bolt end head accommodating cavity is provided with a groove and a bulge; the groove and the bulge are arranged at intervals.

Specifically, 4 grooves are symmetrically distributed along the axial direction and the circumferential direction of the cavity; the bulges are 4 and are symmetrically distributed along the axial direction and the circumferential direction of the cavity.

The depth of the groove is L1, the thickness of the side wall of the cavity is N1, and L1 is more than or equal to 0.5 XN 1. On the premise of realizing basic functions, the upper limit of L1 is not required, and the thickness of the side wall of the cavity is not penetrated.

Specifically, the height of the groove is consistent with the height of the side wall of the cavity.

Specifically, the distance between the protrusions of each group which are symmetrical along the central axis of the cavity is L2, and the outer ring diameter of the bolt end with the smallest size is L2

L2 is not more than

Specifically, the protrusion is arc-shaped, the central angle is theta, and theta is more than or equal to 30 degrees.

Specifically, the skirt edge is of a cambered disc shape or a rectangular structure and is used for shielding conductive structures such as a bolt flange and a copper bar end head, and the mounting position is fully covered.

Specifically, the bolt insulating cap structure is the silica gel material.

The working principle of the bolt insulating cap structure is as follows: after the high-voltage circuit of the main relay is assembled, the bolt end is completely pressed into the bolt end accommodating cavity according to the direction of parts shown in fig. 5, the protrusion plays a role in fixing and clamping the bolt end, and the skirt edge completely covers the end of the copper bar, so that the insulating protection effect is achieved. The recess is in free state originally, and at the in-process of impressing, if the size of bolt end is great, then the recess will be expanded, and bolt end holds the chamber and will expand deformation this moment to hold the bolt end of great size.

The utility model has the advantages that:

the utility model provides a small in size, simple structure, and but variable diameter's bolt insulator cap structure to reach and to install the purpose at not unidimensional bolt end. The bolt end accommodating cavity is provided with a groove and a bulge, so that the bolt end with different sizes can be fixed, and the bolt end can be reliably used without loosening. The skirt edge is designed into a cambered disc shape or a rectangular structure and is used for shielding conductive structures such as a bolt flange plate, a copper bar end and the like, and the mounting position is fully covered. The insulation resistance can reach more than 500M omega, and the requirement of GB/T18384.3-2015 part 3 of the safety requirement of electric automobiles is met: the requirement of insulation resistance value specified in the personnel electric shock protection realizes the insulation protection of the positive and negative poles of the main relay.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic sectional view of the present invention;

FIG. 3 is a schematic view of a groove in the bolt head receiving cavity;

FIG. 4 is a schematic view of the projection on the bolt head receiving cavity;

FIG. 5 is a schematic view of the dimensions of the bolt receiving cavity;

FIG. 6 is a schematic diagram of the dimensions of the bolt receiving cavity;

fig. 7 is a schematic view of the assembly of the insulating nut of the present invention; the arrows in the figure indicate the assembly direction.

In the figure, 1-bolt end containing cavity, 2-skirt edge, 11-groove, 15-bulge, 3-main relay, 4-copper bar, 41-copper bar end, 5-bolt and 51-bolt end.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings. It should be noted that the drawings are only for the purpose of explaining the present invention, are schematic illustrations of embodiments of the present invention, and are not to be construed as limiting the present invention.

Example the utility model discloses the structure and use

Referring to fig. 1-3, a variable-diameter bolt insulating cap structure comprises a bolt end containing cavity 1 and a skirt edge 2 formed by extending the edge of an opening of the cavity; the inner surface of the bolt end head accommodating cavity 1 is provided with a groove 11 and a bulge 15; the grooves 11 are spaced from the projections 15. Specifically, 4 grooves 11 are symmetrically distributed along the axial direction and the circumferential direction of the cavity; the number of the bulges 15 is 4, and the bulges are symmetrically distributed along the axial direction and the circumferential direction of the cavity. The depth of the groove 11 is L1, the thickness of the side wall of the cavity is N1, and L1 is more than or equal to 0.5 XN 1. On the premise of realizing basic functions, the upper limit of L1 is not required, and the thickness of the side wall of the cavity is not penetrated. The height of the groove 11 is consistent with that of the side wall of the cavity. As shown in FIGS. 5 and 6, the distance between the protrusions of each set, which are symmetrical about the central axis of the cavity, is L2, and the outer diameter of the outer ring of the bolt head 51 having the smallest dimension is L2

L2 is not more than

As shown in FIG. 4, the protrusion 15 has an arc shape with a central angle θ of 30 °.

Specifically, the skirt edge 2 is of a cambered disc shape or a rectangular structure and is used for shielding conductive structures such as a bolt flange and a copper bar end head, and the mounting position is completely covered.

Specifically, the bolt insulating cap structure is the silica gel material.

Referring to fig. 7, the high-voltage circuit of the main relay generally comprises the main relay 3, the copper bar 4 and the bolt 5. Wherein, copper bar 4 contains copper bar end 41, and bolt 5 contains bolt end 51. After the high-voltage circuit of the main relay is assembled, the copper bar end 41 and the bolt end 51 are exposed high-voltage conductors.

The working principle is as follows: after the high-voltage circuit of the main relay is assembled, according to the direction of the parts shown in fig. 5, the bolt end 51 is completely pressed into the bolt end accommodating cavity 1, and the skirt edge 2 completely covers the copper bar end 41, so that the effect of insulation protection is achieved. The groove 11 is originally in a free state, and during the pressing-in process, if the size of the bolt head 51 is larger, the groove 11 will be expanded, and at the same time, the bolt head accommodating cavity 1 will be expanded and deformed, so as to accommodate the bolt head 51 with larger size.

Claims

1. A bolt insulating cap structure with a variable diameter is characterized by comprising a bolt end head accommodating cavity (1) and a skirt edge (2) formed by extending the edge of an opening of the cavity; the inner surface of the bolt end head accommodating cavity (1) is provided with a groove (11) and a bulge (15); the grooves (11) and the protrusions (15) are arranged at intervals.

2. The variable diameter bolt insulating cap structure according to claim 1, wherein the number of the grooves (11) is 4, and the grooves are symmetrically distributed along the axial direction and the circumferential direction of the cavity; the number of the bulges (15) is 4, and the bulges are symmetrically distributed along the axial direction and the circumferential direction of the cavity.

3. The variable diameter bolt insulating cap structure according to claim 1, wherein the depth of the groove (11) is L1, the cavity side wall thickness is N1, and L1 is 0.5 XN 1 or more.

4. The variable diameter bolt insulating cap structure according to claim 1, characterized in that the height of the recess (11) coincides with the height of the cavity side wall.

5. The variable diameter bolt insulating cap structure according to claim 1, wherein the distance between the protrusions of each set symmetrical about the central axis of the cavity is L2, the outer diameter of the outer ring of the bolt head (51) of the smallest size is Φ 1, and L2 is not more than Φ 1.

6. The variable diameter bolt insulating cap structure according to claim 1, wherein the protrusion (15) has an arc shape with a central angle θ of not less than 30 °.

7. The variable diameter bolt cap structure of claim 1, wherein the skirt (2) is a cambered disc or rectangular structure for shielding the conductive structure to achieve full coverage of the mounting location.

8. The variable diameter bolt cap structure of claim 1, wherein the bolt cap structure is a silicone material.