CN220509925U - Contactor mounting structure - Google Patents

Abstract

The utility model belongs to the technical field of vehicles, and discloses a contactor mounting structure which comprises a lower mounting shell, a contactor, an upper mounting shell and a heat dissipation assembly. The contactor is fixedly arranged in the lower mounting shell, the contactor comprises a shell, a binding post, a connecting conductor and a fastener, the binding post penetrates through the shell to be exposed, the connecting conductor is connected to the part of the binding post exposed out of the shell, and the connecting conductor is fastened on the binding post by the fastener. The upper mounting shell cover is arranged on the lower mounting shell. The heat dissipation assembly comprises a heat conduction block and an insulating heat conduction pad, wherein the heat conduction block comprises a connecting part and a heat conduction part, the connecting part is sleeved on the binding post and clamped between the fastening piece and the connecting conductor, the heat conduction part is clamped between the connecting conductor and the upper mounting shell, and the insulating heat conduction pad is clamped between the heat conduction part and the upper mounting shell. The contactor installation structure improves the heat radiation capacity of the contactor, and further improves the current carrying capacity of the contactor.

Description

Contactor mounting structure

Technical Field

The utility model relates to the technical field of vehicles, in particular to a contactor installation structure.

Background

The high-current direct-current contactor can be used in electric control products (such as a motor controller, a DC/DC converter, a PDU controller and the like) of the new energy vehicle. In these controllers, contactors are an important component, and are generally disposed in a closed space for controlling the on and off of a current.

The housing of the high-current direct-current contactor is usually made of epoxy resin, so that the thermal conductivity is small, and the heat dissipation effect is extremely poor even if a heat dissipation structure (such as a cooling water path) is additionally arranged at the bottom of the housing. Because of the lack of a good heat dissipation structure, the temperature rise of the binding post of the contactor can be very high under the condition of high current carrying, and the temperature protection mechanism of the contactor is limited, so that the current carrying of the contactor is difficult to reach the rated current.

Accordingly, there is a need for a contactor mounting structure to solve the above-mentioned problems.

Disclosure of Invention

The utility model aims to provide a contactor mounting structure for improving the heat dissipation capacity of a contactor.

To achieve the purpose, the utility model adopts the following technical scheme:

a contactor mounting structure comprising:

a lower mounting case;

the contactor is fixedly arranged in the lower mounting shell and comprises a shell, a binding post, a connecting conductor and a fastening piece, wherein the binding post penetrates through the shell to be exposed, the connecting conductor is connected to the part of the binding post exposed out of the shell, and the fastening piece is used for fastening the connecting conductor on the binding post;

an upper mounting shell which is covered on the lower mounting shell;

the heat dissipation assembly comprises a heat conduction block and an insulating heat conduction pad, wherein the heat conduction block comprises a connection part and a heat conduction part, the connection part is sleeved on the binding post and is clamped between the fastening piece and the connection conductor, the heat conduction part is clamped between the connection conductor and the upper mounting shell, and the insulating heat conduction pad is clamped between the heat conduction part and the upper mounting shell.

Preferably, the heat dissipation assembly further comprises insulating paper, and the insulating paper is sandwiched between the insulating heat conduction pad and the upper mounting shell and covers the insulating heat conduction pad.

Preferably, the sum of the thicknesses of the fastener and the connecting portion is not greater than the thickness of the heat conducting portion.

Preferably, the fastener and the heat conducting block are both metal parts.

Preferably, the heat conducting block further comprises a limiting part, and the limiting part is abutted with the side face of the connecting conductor.

Preferably, the contactor comprises two binding posts, and the heat conducting blocks are arranged in one-to-one correspondence with the binding posts.

Preferably, the limit portion is disposed between two terminals of the contactor.

Preferably, the two sides of the shell are provided with ear plates, and the ear plates are fixed on the lower mounting shell.

Preferably, the insulating heat conducting pad is a silica gel pad.

Preferably, the fastener is a nut.

The utility model has the beneficial effects that:

the utility model relates to a contactor mounting structure, which comprises a lower mounting shell, a contactor, an upper mounting shell and a heat dissipation assembly. The contactor is fixedly arranged in the lower mounting shell, the contactor comprises a shell, a binding post, a connecting conductor and a fastener, the binding post penetrates through the shell to be exposed, the connecting conductor is connected to the part of the binding post exposed out of the shell, and the connecting conductor is fastened on the binding post by the fastener. The upper mounting shell cover is arranged on the lower mounting shell. The heat dissipation assembly comprises a heat conduction block and an insulating heat conduction pad, wherein the heat conduction block comprises a connecting part and a heat conduction part, the connecting part is sleeved on the binding post and clamped between the fastening piece and the connecting conductor, the heat conduction part is clamped between the connecting conductor and the upper mounting shell, and the insulating heat conduction pad is clamped between the heat conduction part and the upper mounting shell. After heat in the shell of the contactor is conducted to the connecting conductor through the binding post, the heat can be transferred to the insulating heat conducting pad through the heat conducting part of the heat conducting block and transferred to the upper mounting shell through the insulating heat conducting pad, and the upper mounting shell is transferred to air outside the contactor mounting structure, so that the heat radiating area of the contactor is increased, the heat radiating capacity of the contactor is improved, and the current carrying capacity of the contactor is further improved. The insulating heat conduction pad plays an insulating role, avoids electrification of the upper mounting shell, and in addition, can improve vibration resistance of the contactor mounting structure, so that reliability of the contactor mounting structure is improved, and the effect of compensating mounting errors of various components can be achieved.

Drawings

FIG. 1 is a schematic view of a contactor mounting structure provided by an embodiment of the present utility model;

fig. 2 is an exploded view of a contactor mounting structure provided by an embodiment of the present utility model;

FIG. 3 is a schematic view of the structure of a lower mounting case according to an embodiment of the present utility model;

FIG. 4 is a schematic view of the structure of an upper mounting shell provided by an embodiment of the present utility model;

fig. 5 is a schematic structural view of a contactor according to an embodiment of the present utility model;

fig. 6 is a schematic structural view of each connection conductor of the contactor mounting structure provided in the embodiment of the present utility model;

fig. 7 is a schematic structural diagram of two heat conducting blocks on a contactor according to an embodiment of the present utility model;

FIG. 8 is a schematic view of a fastener provided in an embodiment of the present utility model;

fig. 9 is a schematic structural diagram of an insulating thermal pad according to an embodiment of the present utility model;

fig. 10 is a schematic structural diagram of an insulating paper according to an embodiment of the present utility model.

In the figure:

1. a lower mounting case; 11. a mounting base;

2. a contactor;

21. a housing; 211. Ear plates;

22. binding posts; 23. A connection conductor; 24. A fastener;

3. an upper mounting shell;

4. a heat dissipation assembly;

41. a heat conduction block;

411. a connection part; 412. a heat conduction part; 413. a limit part;

42. an insulating thermal pad; 43. an insulating paper.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", and the like are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

As shown in fig. 1 to 9, the present embodiment provides a contactor mounting structure including a lower mounting case 1, a contactor 2, an upper mounting case 3, and a heat dissipation assembly 4. The upper mounting case 3 is covered on the lower mounting case 1, and specifically, in the present embodiment, the upper mounting case 3 and the lower mounting case 1 are detachably connected by bolts. The contactor 2 is fixedly arranged in the lower mounting shell 1, the contactor 2 comprises a shell 21, a binding post 22, a connecting conductor 23 and a fastening piece 24, the binding post 22 penetrates through the shell 21 to be exposed, the connecting conductor 23 is connected to the part of the binding post 22 exposed out of the shell 21, the fastening piece 24 fastens the connecting conductor 23 on the binding post 22, and the connecting conductor 23 is used for current input and output of the contactor 2. In the present embodiment, the connection conductor 23 is a copper bar, the contactor 2 is a dc contactor, and two contactors 2 are installed in one lower mounting case 1, and in other embodiments, the number of contactors 2 in one lower mounting case 1 may be adjusted as needed. The heat dissipation assembly 4 includes a heat conduction block 41 and an insulating heat conduction pad 42, the heat conduction block 41 includes a connection portion 411 and a heat conduction portion 412, the connection portion 411 is sleeved on the binding post 22 and is clamped between the fastener 24 and the connection conductor 23, the heat conduction portion 412 is clamped between the connection conductor 23 and the upper mounting shell 3, and the insulating heat conduction pad 42 is clamped between the heat conduction portion 412 and the upper mounting shell 3. In this embodiment, the insulating thermal pad 42 is a silica gel pad.

In the contactor installation structure provided in this embodiment, after heat in the housing 21 of the contactor 2 is conducted to the connection conductor 23 through the binding post 22, the heat can be transferred to the insulating heat conducting pad 42 through the heat conducting portion 412 of the heat conducting block 41, and transferred to the upper installation shell 3 through the insulating heat conducting pad 42, and the upper installation shell 3 is transferred to air outside the contactor installation structure, so that the heat dissipation area of the contactor 2 is increased, the heat dissipation capacity of the contactor 2 is improved, and the current carrying capacity of the contactor 2 is further improved. The insulating and heat conducting pad 42 plays an insulating role, prevents the upper mounting case 3 from being electrified, and in addition, can improve the vibration resistance of the contactor mounting structure, thereby improving the reliability of the contactor mounting structure, and can also play a role in compensating for the mounting errors of various components.

Specifically, as shown in fig. 2 and 7, in the present embodiment, the connection portion 411 is provided with a connection hole, and the connection portion 411 is fitted over the post 22 through the connection hole, so that the fastener 24 can firmly fasten the connection portion 411 to the connection conductor 23.

Optionally, as shown in fig. 1, the bottom surface of the heat conducting block 41 is attached to the connection conductor 23, and the top surface is attached to the insulating heat conducting pad 42, so as to improve the heat conducting effect of the heat conducting block 41.

Alternatively, as shown in fig. 2 and 5, the contactor 2 includes two terminals 22, and the heat conducting blocks 41 are disposed in one-to-one correspondence with the terminals 22, and one heat conducting block 41 is disposed on each terminal 22, that is, heat in each contactor 2 can be transferred to the connection conductor 23 and the heat conducting block 41 through the two terminals 22, then transferred to the insulating heat conducting pad 42 through the heat conducting block 41, and transferred to the upper mounting case 3 through the insulating heat conducting pad 42, and transferred to air outside the contactor mounting structure through the upper mounting case 3.

Optionally, the fastener 24 and the heat conducting block 41 are metal parts, the metal parts are low in cost and good in heat conducting effect, and the metal heat conducting block 41 connects the binding post 22 and the connecting conductor 23, so that the current carrying capacity between the binding post 22 and the connecting conductor 23 is improved

Specifically, as shown in fig. 2 and 8, in the present embodiment, the fastening member 24 is a nut, the heat conducting block 41 is a copper structural member, and in other embodiments, other types of fastening members 24 and heat conducting blocks 41 made of other materials may be used.

Alternatively, the sum of the thicknesses of the fastener 24 and the connection portion 411 is not greater than the thickness of the heat conductive portion 412. That is, after the connecting portion 411 is fastened to the connecting conductor 23 by the fastening member 24, the distal end face of the fastening member 24 does not protrude from the distal end face of the heat conducting portion 412, so that the fastening member 24 can avoid adverse effects on the contact between the insulating heat conducting pad 42 and the distal end face of the heat conducting portion 412. Specifically, in the present embodiment, the tip end face of the heat conducting portion 412 is a plane and parallel to the inner surface of the upper mounting case 3 that is in contact with the insulating heat conducting pad 42.

Optionally, as shown in fig. 2 and 7, the heat conducting block 41 further includes a limiting portion 413, and the limiting portion 413 abuts against a side surface of the connection conductor 23. Through the side butt of spacing portion 413 and connecting conductor 23, play the spacing effect to heat conduction piece 41, avoid fastener 24 to fasten heat conduction piece 41 on connecting conductor 23 back heat conduction piece 41 to take place to rotate around spliced pole 22 to make heat conduction piece 41 have stable heat conduction effect.

Further, as shown in fig. 2 and 7, a stopper 413 is provided between the two posts 22 of the contactor 2. The connection conductor 23 is provided with a gap between the two posts 22 of the contactor 2, and the stopper 413 protrudes into the gap.

Specifically, as shown in fig. 2 and 7, in the present embodiment, the limiting portion 413 is plate-shaped and attached to the side surface of the connection conductor 23 at the gap, and the plate-shaped limiting portion 413 is attached to the side surface of the connection conductor 23 to enable the limiting effect on the heat conduction block 41, preventing the heat conduction block 41 from shaking in the circumferential direction of the post 22.

Alternatively, as shown in fig. 1 and 2, the case 21 is provided with the ear plates 211 on both sides, the ear plates 211 are fixed to the lower mounting case 1, and the connection fixation between the case 21 and the lower mounting case 1 is achieved by the ear plates 211. Preferably, the ear plate 211 is detachably connected to the lower mounting case 1 to facilitate the detachment of the contactor 2.

Further, as shown in fig. 2 and 3, the lower mounting shell 1 is provided with mounting seats 11, the mounting seats 11 are arranged in one-to-one correspondence with the contactors 2, the contactors 2 are mounted on the mounting seats 11, and the ear plates 211 are detachably connected with the mounting seats 11.

Specifically, as shown in fig. 3 and 5, in this embodiment, threaded holes are formed in the ear plate 211, a plurality of threaded holes are also formed in the mounting base 11, the threaded holes in the ear plate 211 correspond to the threaded holes in the mounting base 11 one by one, and bolts pass through the threaded holes in the ear plate 211 and the threaded holes in the mounting base 11 to fix the ear plate 211 to the mounting base 11, thereby realizing connection between the contactor 2 and the lower mounting case 1.

Optionally, as shown in fig. 1, 2 and 10, the heat dissipation assembly 4 further includes an insulating paper 43, and the insulating paper 43 is sandwiched between the insulating heat conductive pad 42 and the upper mounting case 3 and covers the insulating heat conductive pad 42. Because the insulating and heat conducting pad 42 has elasticity, in some cases, the insulating and heat conducting pad 42 becomes thinner due to the extrusion of the upper mounting shell 3 and the heat conducting block 41, so that the insulating effect of the insulating and heat conducting pad 42 is reduced, and the upper mounting shell 3 and the lower mounting shell 1 are brought to a point when serious, so that the operation safety is affected. To avoid this, in the present embodiment, an insulating paper 43 is provided between the insulating heat conductive pad 42 and the upper mounting case 3 to improve the insulating effect between the upper mounting case 3 and the heat conductive block 41, improving mountability.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. The contactor mounting structure, its characterized in that includes:

a lower mounting case (1);

the contactor (2) is fixedly arranged in the lower mounting shell (1), the contactor (2) comprises a shell (21), a binding post (22), a connecting conductor (23) and a fastener (24), the binding post (22) is exposed through the shell (21), the connecting conductor (23) is connected to the part of the binding post (22) exposed out of the shell (21), and the fastener (24) is used for fastening the connecting conductor (23) on the binding post (22);

an upper mounting shell (3) which is covered on the lower mounting shell (1);

the heat dissipation assembly (4) comprises a heat conduction block (41) and an insulating heat conduction pad (42), wherein the heat conduction block (41) comprises a connecting part (411) and a heat conduction part (412), the connecting part (411) is sleeved on the binding post (22) and is clamped between the fastening piece (24) and the connecting conductor (23), the heat conduction part (412) is clamped between the connecting conductor (23) and the upper mounting shell (3), and the insulating heat conduction pad (42) is clamped between the heat conduction part (412) and the upper mounting shell (3).

2. The contactor mounting structure according to claim 1, wherein the heat dissipation assembly (4) further includes an insulating paper (43), the insulating paper (43) being sandwiched between the insulating heat conductive pad (42) and the upper mounting case (3) and covering the insulating heat conductive pad (42).

3. The contactor mounting structure according to claim 1, wherein a sum of thicknesses of the fastener (24) and the connection portion (411) is not greater than a thickness of the heat conduction portion (412).

4. The contactor mounting structure according to claim 1, wherein the fastener (24) and the heat conductive block (41) are both metal parts.

5. The contactor mounting structure according to claim 1, wherein the heat conductive block (41) further includes a stopper (413), the stopper (413) abutting against a side surface of the connection conductor (23).

6. The contactor mounting structure according to claim 5, wherein the contactor (2) includes two terminals (22), and the heat conductive blocks (41) are provided in one-to-one correspondence with the terminals (22).

7. The contactor installation structure according to claim 6, wherein the limiting portion (413) is provided between two of the posts (22) of the contactor (2).

8. The contactor mounting structure according to any one of claims 1 to 7, characterized in that the housing (21) is provided with ear plates (211) on both sides, the ear plates (211) being fixed to the lower mounting case (1).

9. The contactor mounting structure according to any of claims 1-7, wherein the insulating and thermally conductive pad (42) is a silicone pad.

10. The contactor mounting structure according to any of claims 1-7, wherein the fastener (24) is a nut.