阅读说明：本技术 一种双背板结构及其atr机箱 (Double-backboard structure and ATR case thereof ) 是由 张少枫 王树超 李勇利 徐康生 于 2020-07-10 设计创作，主要内容包括：本发明公开了一种双背板结构,包括A背板和B背板,A背板上嵌装有子板卡连接器,且A背板的一侧面上还固定安装有定位销座；B背板上嵌装有母板卡连接器,且B背板的一侧面上还固定安装有定位销,定位销插接在定位销座的内部,B背板通过定位销与定位销座相配合和A背板相连接,且B背板平行于A背板设置,母板卡连接器与子板卡连接器插接连接,且母板卡连接器与子板卡连接器电性连接,可单独拆除亦可随背部面板拆除,结构牢固并便于维护；本发明还公开了一种ATR机箱,包括机箱底板、机箱面板、机箱背板、机箱右板、机箱左板、机箱顶板、机箱内部板卡、A背板和B背板,刚性连接可保证信号及系统的稳定性。(The invention discloses a double-backboard structure, which comprises a backboard A and a backboard B, wherein a daughter board card connector is embedded in the backboard A, and a positioning pin seat is also fixedly installed on one side surface of the backboard A; the back plate B is embedded with a mother plate card connector, one side surface of the back plate B is also fixedly provided with a positioning pin, the positioning pin is inserted in the positioning pin seat, the back plate B is matched with the positioning pin seat through the positioning pin and is connected with the back plate A, the back plate B is arranged parallel to the back plate A, the mother plate card connector is inserted and connected with the daughter plate card connector, the mother plate card connector is electrically connected with the daughter plate card connector, and the mother plate card connector can be independently detached or detached along with a back panel, has a firm structure and is convenient to maintain; the invention also discloses an ATR case, which comprises a case bottom plate, a case panel, a case back plate, a case right plate, a case left plate, a case top plate, a case internal board card, an A back plate and a B back plate, wherein the rigid connection can ensure the stability of signals and systems.)

1. A double-backboard structure is characterized in that: the method comprises the following steps:

the card connector comprises a back plate A (1), wherein a daughter board card connector (102) is embedded in the back plate A (1), and a positioning pin seat (101) is fixedly installed on one side surface of the back plate A (1);

the back board B (2), the mother board card connector (202) is embedded in the back board B (2), a positioning pin (201) is further fixedly mounted on one side face of the back board B (2), the positioning pin (201) is inserted in the positioning pin seat (101), the back board B (2) is matched with the positioning pin seat (101) through the positioning pin (201) and connected with the back board A (1), the back board B (2) is parallel to the back board A (1), the mother board card connector (202) is connected with the daughter board card connector (102) in an inserting mode, and the mother board card connector (202) is electrically connected with the daughter board card connector (102).

2. A dual backplane structure according to claim 1, wherein: still install fixed cushion (204) through screw (205) on B backplate (2), aviation electric connector (203) is installed to the inside interference fit of fixed cushion (204), aviation electric connector (203) with motherboard card connector (202) electric connection.

3. A dual backplane structure according to claim 2, wherein: and the middle part of the fixed cushion block (204) is also reserved with a fitting hole (206) which is in interference fit with the aviation electric connector (203).

4. An ATR chassis, characterized in that: comprising a chassis body (3) and the dual backplane structure of claim 3;

the case body (3) comprises a case bottom plate (304), a case panel (306), a case back plate (305), a case right plate (301), a case left plate (302), a case top plate (303) and a case internal board card (307), the case panel (306) and the case back plate (305) are symmetrically and fixedly installed at the front part and the rear part of the case bottom plate (304), the case right plate (301) and the case left plate (302) are symmetrically and fixedly installed at the right part and the left part of the case bottom plate (304), the case top plate (303) is fixedly installed at the tops of the case panel (306), the case back plate (305), the case right plate (301) and the case left plate (302), the case bottom plate (304), the case panel (306), the case back plate (305), the case right plate (301), the case left plate (302) and the case top plate (303) enclose an installation space, the case internal board card (307) is fixedly arranged in the mounting space, the double-backboard structure comprises the backboard A (1) and the backboard B (2), the A backboard (1) and the B backboard (2) are fixedly arranged between the case internal board card (307) and the case backboard (305), the B backboard (2) is arranged close to the case backboard (305), and the avionic connectors (203) on the B-backplane (2) extend through the chassis backplane (305) and outside the installation space, the daughter board card connector (102) on the A backboard (1) is electrically connected with the internal board card (307) of the case, the aviation electric connector (203) is electrically connected with the internal board card (307) of the case through the daughter board card connector (102) and the mother board card connector (202).

5. An ATR chassis according to claim 4, wherein: and a through hole matched with the aviation electric connector (203) is reserved on the chassis back plate (305).

6. An ATR chassis according to claim 4, wherein: the ATR cabinet is designed by the following method: the method specifically comprises the following steps:

step one, when the ATR case is designed, the functions of the ATR case are divided as follows: the board card (307) in the case is vertically inserted from the case panel (306) and is connected with the daughter board card connector (102) on the A backboard (1), so that the quick plugging and replacement of the board card (307) in the case are realized;

step two, all external output signals are uniformly led out by the aviation electric connector (203) penetrating through the chassis back plate (305), so that the equipment is convenient to use and the integral attractiveness is kept;

step three, the chassis bottom plate (304), the chassis right plate (301), the chassis left plate (302) and the chassis top plate (303) are used for providing fixed support and heat dissipation functions;

and step four, in order to ensure the signal integrity of each electric connector, all the electric connectors are directly welded on the circuit board.

Technical Field

The invention relates to the technical field of cabinets, in particular to a double-backboard structure and an ATR cabinet thereof.

Background

With the continuous improvement of the modularization and the generalization degree of the chassis, the ATR chassis has more and more applications in various fields. The ATR case refers to a standard case which accords with the civil aircraft avionics equipment case shell, a frame, cooling air and a connector specified in the specification transport plane equipment case and mounting rack. Due to the characteristics of vibration resistance, reinforcement, cooling and the like, the ATR case has greater applicability in a small-sized load platform and a complex application environment, so that higher requirements are provided for the size, convenience, simplification, stability and the like of the case, and the design of the case back plate occupies a great proportion in the aspects.

At present, most of ATR cabinets adopt a single-backplane or flexible interconnection dual-backplane technology, and have many defects and shortcomings:

1. the single-backplane technology is only suitable for occasions with loose size limitation and no signal integrity requirement, and the single-backplane technology cannot solve the contradiction between the size of a small backplane and the size of a plurality of aviation electric connectors;

2. the technology of interconnecting the two back plates by the flexible plate has the problems of complex welding process of the flexible plate, high cost, difficulty in disassembly and maintenance, high failure rate of flexible fixation and the like.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a machine box type double-backboard structure, which aims to solve the contradiction design of a small backboard and a plurality of aviation electric connectors.

In order to achieve the purpose, the invention provides the following technical scheme:

a double-backboard structure comprises a backboard A and a backboard B,

the A back plate is embedded with a daughter board card connector, and a positioning pin seat is fixedly arranged on one side surface of the A back plate;

the back plate B is embedded with a mother plate card connector, a positioning pin is fixedly mounted on one side face of the back plate B, the positioning pin is inserted into the positioning pin seat, the back plate B is matched with the positioning pin seat through the positioning pin and is connected with the back plate A, the back plate B is parallel to the back plate A, the mother plate card connector is connected with the daughter board card connector in an inserting mode, and the mother plate card connector is electrically connected with the daughter board card connector.

Furthermore, a fixing cushion block is further installed on the back plate B through a screw, an aviation electric connector is installed in the fixing cushion block in an interference fit mode, and the aviation electric connector is electrically connected with the motherboard card connector.

Furthermore, the middle part of the fixed cushion block is reserved with a fitting hole in interference fit with the aviation electric connector.

The invention also provides an ATR case, which comprises a case body and the double-backboard structure;

the case body comprises a case bottom plate, a case panel, a case back plate, a case right plate, a case left plate, a case top plate and a case internal plate card, the case panel and the case back plate are symmetrically and fixedly arranged at the front part and the rear part of the case bottom plate, the case right plate and the case left plate are symmetrically and fixedly arranged at the right part and the left part of the case bottom plate, the case top plate is fixedly arranged at the top parts of the case panel, the case back plate, the case right plate and the case left plate, the case bottom plate, the case panel, the case back plate, the case right plate, the case left plate and the case top plate enclose an installation space, the case internal plate card is fixedly arranged in the installation space, the double-back-plate structure comprises the A back plate and the B back plate, the A back plate and the B back plate are fixedly arranged between the case internal plate card and the case back plate, the B backboard is close to the case backboard, the aviation electric connector on the B backboard penetrates through the case backboard and extends to the outside of the installation space, the daughter board connector on the A backboard is electrically connected with the internal board card of the case, and the aviation electric connector passes through the daughter board connector and the mother board connector and is electrically connected with the internal board card of the case.

Furthermore, a through hole matched with the aviation electric connector is reserved on the chassis back plate.

Further, the ATR chassis is designed by the following method: the method specifically comprises the following steps:

step one, when the ATR case is designed, the functions of the ATR case are divided as follows: the board card in the case is vertically inserted from the case panel and is connected with the daughter board card connector on the A backboard, so that the quick plugging and replacement of the board card in the case are realized;

all external output signals are uniformly led out by the aviation electric connector penetrating through the back plate of the case, so that the equipment is convenient to use and the integral attractiveness is kept;

thirdly, the chassis bottom plate, the chassis right plate, the chassis left plate and the chassis top plate are used for providing fixed support and heat dissipation functions;

and step four, in order to ensure the signal integrity of each electric connector, all the electric connectors are directly welded on the circuit board.

In summary, the invention mainly has the following beneficial effects:

1. according to the double-backboard structure, the problems that the welding process of the flexible board is complex, the cost is high, the disassembly and maintenance are difficult, the flexible fixing failure rate is high and the like in the technology of interconnecting the double backplanes by the flexible board are effectively solved;

2. the ATR chassis provided by the invention effectively solves the problems that the single-backplane technology in the prior art is only suitable for occasions with loose size limitation and no signal integrity requirement, and the single-backplane technology cannot solve the contradiction between the size of a small backplane and a plurality of aviation electric connectors;

3. the invention provides a design method of an ATR case, aiming at ensuring stable structure, an aviation electric connector is directly welded on a B backboard in an inserting mode, so that the production process can be simplified, and the signal integrity can be ensured.

Drawings

FIG. 1 is a schematic view of a dual-backplane structure A according to an embodiment;

FIG. 2 is a schematic view of a B-backplane structure of a dual-backplane structure according to an embodiment;

FIG. 3 is a schematic diagram of an embodiment of an A-plane of a dual-plane architecture when assembled inside an ATR chassis;

FIG. 4 is a schematic diagram of an embodiment of a B-backplane of a dual-backplane configuration assembled inside an ATR chassis;

FIG. 5 is a schematic structural diagram of a dual-backplane structure according to an embodiment after an avionic connector is installed on a backplane B;

FIG. 6 is a schematic view of the structure of FIG. 5 taken along section line B-B;

FIG. 7 is a schematic side view of a dual backplane configuration with an avionic connector installed in the B backplane of the dual backplane configuration according to one embodiment;

FIG. 8 is a schematic structural view of one embodiment of a fixed shim plate;

fig. 9 is an exploded view of an ATR chassis according to an embodiment.

In the figure: 1. a, a back plate; 101. positioning a pin boss; 102. a daughter board card connector; 2. b, a back plate; 201. positioning pins; 202. a motherboard card connector; 203. an avionic connector; 204. fixing the cushion block; 205. a screw; 206. an assembly hole; 3. a chassis body; 301. a right plate of the case; 302. a left panel of the chassis; 303. a top plate of the case; 304. a chassis base plate; 305. a chassis backplane; 306. a chassis panel; 307. a board card is arranged in the case; 308. and a chassis base plate.

Detailed Description

The present invention is described in further detail below with reference to figures 1-9.