CN209748738U - Vehicle-mounted switch - Google Patents

Abstract

A vehicle-mounted switch belongs to the technical field of vehicle-mounted Ethernet communication technology and machinery of rail transit. The power supply comprises a shell and an internal circuit, wherein the internal circuit comprises an interface board, a core board, a power supply board and a power supply module, the upper end surface of the power supply module is connected with the power supply board, and the lower end surface of the power supply module is in contact with a bottom plate of the shell; the interface board, the core board and the power board are sequentially connected with the inner cavity of the shell from top to bottom. The electromagnetic and thermal design method has the characteristics of convenience in installation, production and assembly, attractive design, good electromagnetic compatibility and thermal design.

Description

Vehicle-mounted switch

Technical Field

The utility model relates to a vehicle-mounted switch belongs to on-vehicle ethernet communication technology and mechanical technical field.

Background

Because the service environment of the vehicle-mounted Ethernet switch is complex, the occupied space of the equipment end is required to be reduced as much as possible, the installation space of each equipment is compact, and the thermal design requirement on the equipment is higher and higher under the condition that a volatile-effect heat dissipation fan device cannot be installed.

The reasonable layout of thermal design is needed, and the equipment is ensured to normally work at the environmental limit temperature in a limited installation space.

Disclosure of Invention

In order to overcome the not enough of prior art, the utility model provides a vehicle-mounted switch.

The vehicle-mounted switch comprises a shell and an internal circuit, wherein the internal circuit comprises an interface board, a core board, a power supply board and a power supply module, the upper end face of the power supply module is connected with the power supply board, and the lower end face of the power supply module is in contact with a bottom plate of the shell.

The bottom plate of the switch housing includes a raised structure that contacts the lower end surface of the power supply.

The exchanger comprises an aluminum heat conducting plate, a heat radiating fin and a heat conducting silica gel pad; the core plate is connected with the aluminum heat-conducting plate through the radiating fins and the heat-conducting silica gel pads in sequence, and the aluminum heat-conducting plate is connected with the side wall of the casing.

The side wall of the switch shell is provided with a sawtooth-shaped heat dissipation structure, and the bottom plate of the shell is provided with a groove-shaped groove structure. The casing adopts aluminium alloy mosaic structure.

The interface board, the core board and the power board of the switch are respectively inserted into the inner cavity of the shell.

The switch comprises a guide plate and a power supply physical interface; the power panel, the guide plate, the core plate and the interface plate are sequentially arranged in the inner cavity of the shell from bottom to top; the guide plate is provided with a through hole; the power supply physical interface is arranged in the through hole in a penetrating mode, one end of the power supply physical interface is connected with the interface board and the core board respectively, and the other end of the power supply physical interface is connected with the power supply board.

The bottom plate of the switch shell can contact with the side plate of the shell, and the formed contact surface is subjected to conductive oxidation treatment.

The switch comprises a conductive rubber strip, and the conductive rubber strip is arranged on the contact surface of the bottom plate and the side plate.

The upper panel of the switch shell is provided with an interface and an indicator light, and the interface and the indicator light are respectively and electrically connected with the interface board.

The utility model has the advantages that: through reasonable heat radiation structure design, the surface heat radiation area of the equipment is greatly increased under the condition of considering the appearance design. The electromagnetic and thermal design method has the characteristics of convenience in installation, production and assembly, attractive design, good electromagnetic compatibility and thermal design.

Drawings

The invention itself, however, as well as many of the attendant advantages thereof, will be best understood by reference to the following detailed description when considered in connection with the accompanying drawings, wherein:

Fig. 1 is a schematic structural diagram of the present invention.

The invention is further described with reference to the following figures and examples.

Detailed Description

Obviously, many modifications and variations of the present invention based on the spirit of the present invention will be apparent to those skilled in the art.

It will be apparent to those skilled in the art that, as used herein, the singular forms "a," "an," "the," and "the" may include the plural forms as well, unless expressly stated otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element, component or section is referred to as being "connected" to another element, component or section, it can be directly connected to the other element or section or intervening elements or sections may also be present. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art.

The following examples are further explained in conjunction with the understanding of the examples, and each example does not constitute a limitation on the examples of the invention.

Example 1: as shown in fig. 1, a car switch includes a housing 101 and an internal circuit, the internal circuit includes an interface board 1, a core board 2, a power board 5 and a power module 6, an upper end surface of the power module 6 is connected to the power board 5, and a lower end surface thereof is in contact with a bottom plate 7 of the housing 101. Through directly contacting the power module 6 with the bottom plate 7, the heat transfer speed is high, the heat transfer area is large, and the heat dissipation effect is ensured.

Further, in order to enhance the heat dissipation effect, the bottom plate of the housing preferably includes a protrusion structure, which is in contact with the lower end surface of the power module 6.

Further, the exchanger can also comprise an aluminum heat-conducting plate 4, a radiating fin and a heat-conducting silica gel pad; the core plate 2 is connected with the aluminum heat-conducting plate 4 sequentially through the radiating fins and the heat-conducting silica gel pads, and the aluminum heat-conducting plate is connected with the side wall of the casing. On one hand, the heat of heating devices (an exchange chip, a PHY chip and a CPU) on the core board 2 is connected to the aluminum heat-conducting plate 4 through the heat-conducting rubber pad, and the heat is conducted to the four side boards through the aluminum heat-conducting plate 4; on the other hand, electromagnetic radiation is isolated, and mutual interference between the core board 2 and the power board 5 is avoided.

Further in order to increase the heat dissipation strength, the side wall of the machine shell is provided with a sawtooth strip-shaped heat dissipation structure, and the bottom plate of the machine shell is provided with a groove-shaped groove structure, so that the heat dissipation area of the machine shell is increased.

Further, the switch comprises an indicating device 100, wherein the indicating device 100 comprises a light guide column 19 and a surface-mounted indicating lamp 11; surface-mounted indicating lamp 11 sets up on casing 101, and leaded light post 19 one end sets up in surface-mounted indicating lamp 11 top, and one end sets up at the casing top to corresponding with the pilot lamp front panel trompil that sets up at the casing top, derive light. In the design of the existing vehicle-mounted network communication equipment, an indicator lamp is generally directly LED out from a core chip, a plug-in luminous LED is also adopted for the indicator lamp, the indicator lamp is LED out from the surface of a machine shell, the working state of the equipment is displayed, the device type selection of the plug-in luminous LED is easy to lead interference into a system core board card when the machine shell is interfered, and the impact on the core chip can damage the core chip and cause system paralysis. This novel adoption table pastes pilot lamp and adds pipe post design, and accuse lamp signal adopts editable logic device control, and the table pastes the lamp and keeps away from behind the casing, avoids the interference on the casing to pass through pilot lamp circuit introduction system, avoids disturbing the formation, even if there is the interference also to avoid damaging the chip, guarantees that system network normally works.

the indication mode of the indicator light can be turning on and off, or flashing or changing different colors to represent different states.

The editable logic device of the switch is arranged below the surface-mounted indicator lamp, so that the shortest signal transmission path is ensured.

The interface board 1, the core board 2 and the power board 5 of the vehicle-mounted switch are respectively inserted into the inner cavity of the casing 101.

The casing 101 of specific on-vehicle switch adopts aluminium alloy mosaic structure casing, the casing guarantees the electric conductivity of contact surface after electrically conductive oxidation treatment, the top panel 16 of casing, curb plate 17, the part that the contact surface between the bottom plate 7 needs to be connected passes through the inside screw of casing fixed with two adjacent contact surfaces, be connected with conductive oxide layer on the contact surface, all inside contact surfaces are whole to be electrically conductive oxidation treatment, conductive rubber strip 18 is embedded on the bottom plate, because the rubber strip has certain elasticity, when the installation, when bottom plate and curb plate locking screw, make curb plate 17 and bottom plate 7 can better contact, conductive rubber strip 18 can make the contact of leading that curb plate 17 and bottom plate 7 can be better guarantee that the contact surface is good to contact.

Through reasonable heat radiation structure design, the surface heat radiation area of the equipment is greatly increased under the condition of considering the appearance design. The electromagnetic and thermal design method has the characteristics of convenience in installation, production and assembly, attractive design, good electromagnetic compatibility and thermal design.

As described above, although the embodiments of the present invention have been described in detail, it will be apparent to those skilled in the art that many modifications are possible without substantially departing from the invention and its effects. Therefore, all such modifications are included in the scope of the present invention.

Claims (10)

1. The vehicle-mounted switch is characterized by comprising a shell and an internal circuit, wherein the internal circuit comprises an interface board, a core board, a power board and a power module, the upper end face of the power module is connected with the power board, and the lower end face of the power module is in contact with a bottom plate of the shell.

2. The on-board vehicle switch of claim 1, wherein the bottom plate of the housing includes a raised structure that contacts the lower end surface of the power module.

3. The on-board vehicle exchanger of claim 1, comprising an aluminum heat-conducting plate, a heat sink and a heat-conducting silicone pad; the core plate is connected with the aluminum heat-conducting plate sequentially through the radiating fins and the heat-conducting silica gel pads, and the aluminum heat-conducting plate is connected with the side wall of the casing.

4. The on-board vehicle exchange of claim 1, wherein the side panels of the housing have a saw-toothed rack-like heat dissipating structure and the bottom panel of the housing has a grooved groove structure.

5. The on-board unit as claimed in claim 4, wherein the chassis is formed by joining aluminum profiles.

6. The on-board vehicle switch according to any one of claims 2 to 5, wherein the interface board, the core board and the power board are respectively inserted into the inner cavity of the housing.

7. The vehicular switch of claim 1, comprising a deflector, a power supply physical interface; the power panel, the guide plate, the core plate and the interface plate are sequentially arranged in the inner cavity of the shell from bottom to top; the guide plate is provided with a through hole; the power supply physical interface is arranged in the through hole in a penetrating mode, one end of the power supply physical interface is connected with the interface board and the core board respectively, and the other end of the power supply physical interface is connected with the power supply board.

8. The vehicular switch according to claim 1, wherein the chassis base plate is contactable with the side plate of the chassis, and a contact surface formed by the contact surface is subjected to conductive oxidation treatment.

9. The vehicular switch according to claim 8, comprising a conductive rubber strip provided on a contact surface between the bottom plate and the side plate.

10. The vehicular switch according to claim 1, wherein the top panel of the housing has an interface and an indicator light; the interface and the indicator light are respectively and electrically connected with the interface board.