JP4845767B2 - Control device - Google Patents

Description

  The present invention relates to a control device installed in a moving vehicle such as a train, an automobile, and a ship.

  With recent IT technology, the conventional analog system is switched to digital communication control, and a control apparatus in a mobile vehicle that communicates a large amount of data at high speed between the mobile vehicle and the ground station is rapidly progressing. Mobile vehicles include Shinkansen and conventional lines, large trucks and buses, ships, and aircraft. These mobile vehicles are provided with various control devices for performing data communication with the ground side in order to improve safety and customer service.

  However, the control device receives vibrations from the outside such as rail joints, tires, and drive devices when the vehicle moves, and is subject to shocks caused by starting and stopping vehicle movement and loading / unloading operations. Impact properties are required.

  On the other hand, there is a strong need for cost reduction of control devices, and competition is intensifying, and it is necessary to reduce costs by maintaining vibration and shock resistance specifications, but there is no effective solution. Is in the situation.

  As means to ensure vibration resistance and impact resistance, methods such as increasing the plate thickness of the device casing, welding a number of members in combination, increasing the welding amount, and using screws and bolts together to strengthen the connection force However, all of these increase the number of members and increase the processing cost.

  In [Patent Document 1], for cost reduction and weight reduction, the case is formed by press-molding a metal plate, and the fastening of the case coupling portion and the fastening of the case and the base member are shared by a common fastening member. A control device for an automobile having a fastening structure is described.

JP 2002-335084 A

  The conventional technique described in [Patent Document 1] can form a case at low cost by cutting or bending a plate material, but can be applied to a case of a circuit unit in which electronic components are arranged on a single substrate. However, a control device having a plurality of modules and a power receiving unit and an interface unit is not considered.

  In addition, when using a standard rack that is commercially available, the printed board mounting pitch is determined with respect to the width of the rack, and there is no choice but to mount one type of printed board according to the rack width regulations. When mounting this printed board, it was necessary to use a special rack with high cost.

  When two different types of printed boards are mounted on a standard rack, conventionally, printed bodies of different sizes are stacked on the printed board that matches the rack size, but the reliability against vibration and impact is reduced. One layer stack is the limit. For this reason, in a harsh environment such as in a moving vehicle, a large number of printed boards stacked in one stage are mounted on a rack, and there is a problem that the control device becomes large and costs increase.

  An object of the present invention is to provide a control device that is installed in a mobile vehicle having a mounting structure effective for cost reduction and vibration resistance design, which are conflicting needs.

  In order to achieve the above object, the control device of the present invention increases the section modulus of a member by bending a single member at several places and combining rivet fastening holes provided in the bent portion. In addition to strengthening the rigidity of the body, it absorbs external shocks by rivet fastening and relaxes various vibrations and shocks in the mobile vehicle, and rivet fastens internal mounting devices and members that fix them.

  Also, printed boards of different sizes are stacked in multiple layers and attached to a rack with a sandwich mounting structure that is resistant to vibrations and impacts, and both vibration resistance and cost reduction of the control device are achieved.

  According to the present invention, it is possible to realize a highly durable and reliable control device against severe vibrations and shocks in a moving vehicle, reduce the number of members used, reduce processing costs, and endure inexpensive commercial equipment. It is possible to reduce the product cost to about 1/3 by a highly efficient mounting method.

  An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view showing a state in which the front door of the control device of this embodiment is removed.

  A commercially available PCI standard-compliant rack 3 for storing printed circuit boards is mounted in the housing 1 in which the internal devices are mounted. The control unit 20 is installed in the upper portion of the housing 1 and mounted on the rack 3. The power receiving unit 8 is installed in the lower part of the housing 1 and receives power from the outside. The interface unit 9 outputs a communication control signal to the outside.

  The control unit 20 receives power supplied from a CPU module 5 (also referred to as a control printed board 5), a communication module 6 (also referred to as a communication printed board 6), and a power receiving unit 8 on which the CPU is mounted. A power module 4 (also referred to as a power printed board 4) for converting a power voltage for the CPU module 5 and the communication module 6, and a HUB module 7 (also referred to as a HUB printed board 7) for maintenance and communication switching. Two systems are installed each.

  As shown in FIG. 2, the housing 1 is manufactured by bending one planar member. In the example of the present embodiment, the outer shape of the housing 1 is width (W) 600 × depth (D) 300 × height (H) 600, and in order to form the housing 1, one member is illustrated. 2 in total in the direction of the arrow 17 shown in FIG. The box-shaped housing 1 is formed by the ceiling folding surface 10, the left side folding surface 11, the right side folding surface 12, and the bottom folding surface 13 with respect to the back surface of the housing 1. The bottom bent surface 13 is formed with an opening 45 for wiring.

  A bent surface 41 is provided above the left side bent surface 11 and the right side bent surface 12, a lower side bent surface 15 is provided below the left side bent surface 11 and the right side bent surface 12, and the left side bent surface 11 and the right side surface are provided. A bending surface 44 is formed on the side of the bending surface 12, a bending surface 42 is formed on the distal end side of the ceiling folding surface 10, and a bending surface 43 is formed on the distal end side of the bottom surface bending surface 13.

  There are six rivet holes 2 on both sides of the ceiling folding surface 10 and three on the folding surface 41 on the left side folding surface 11 and the right side folding surface 12 in order to rivet each folding surface, and the left side folding surface. 11 and 10 at the lower side of the right side folding surface 12 and 10 at both sides of the bottom side folding surface 13, and after fold forming, the rivet holes 2 of the assembled folding surface are fastened with rivets. ing.

  Bolt holes 14 for directly fixing the housing 1 to the mobile vehicle are provided in the side surface lower bent surface 15 and the bottom surface bent surface 13 of the left side bent surface 11 and the right side bent surface 12. In order to alleviate stress concentration due to vibration and impact, the shape of the side lower bent surface 15 is processed into a trapezoidal shape.

  In this way, since the casing is bent at several points on one member and the bent portions are riveted to each other, the casing member can be kept as small as possible and has a structure close to integral molding. The section modulus necessary for performance increases and the rigidity of the housing increases. Moreover, the impact from the outside can be absorbed by rivet-fastening the bent portions.

  In addition, since the bent part has a trapezoidal shape, in the case of a rectangular parallelepiped casing that is long in the height direction, it becomes strong against the vibration and impact load applied to the corner part of the bottom of the device, which is the bolt part that fixes the device. The coefficient can be improved, and the stress applied to the vibration and impact force applied to the bolt and the screw portion for fixing the apparatus can be reduced.

  FIG. 3 is a perspective view showing a state in which the control unit 20 is mounted on the printed board storage rack 3 of the present embodiment. In the example shown in FIG. 3, the communication module 6 composed of two different types of printed boards stacked in a multi-stage on the rack 3 is mounted.

  Generally, the printed board storage rack 3 that is commercially available has one type of size of the printed board to be stored, and the printed board is guided by the printed board insertion rails 23 provided above and below the rack 3 from the front of the rack. insert. In order to insert a printed board that is not compatible with the rack 3, a secondary member is used or a rack having a special shape is used, which increases costs.

  Therefore, in this embodiment, the communication module mounting structure shown in FIG. 4 is adopted, and two types of printed boards of different sizes are mounted on the rack 3.

  When the printed boards 25 of different sizes are stacked on the printed board 28 corresponding to the rack 3 and mounted as they are, they are in a cantilever state and become weak against vibrations and shocks. And a member 26, and a sandwich mounting structure in which the printed board 25 laminated by the member 24 and the member 26 is sandwiched. The material of the printed board 28 is similar to a plastic material, and is more susceptible to cracking than a steel material. Therefore, a role of a heat sink is provided on the back surface of the printed board 28 in order to prevent direct stress and at the same time prevent heat generation due to lamination. A member 24 is provided.

Holes for passing bolts are provided at four corners of the member 24 provided on the back surface of the printed board 28, and holes are also provided at corresponding positions on the printed board 25. The member 26 is provided with an opening 21 larger than the laminated printed board 25 and a claw part 22 for fixing the printed board 25. Holes 29 are provided at positions of the members 26 corresponding to the holes provided at the four corners of the member 24. The member 26 is provided with a dummy panel 27 to be connected to the panel of the printed board 28 so as to withstand vibration and shock specifications in a severe moving vehicle.

  A rack-compatible printed board 28 and a multi-layered printed board 25 are sandwiched by the members 24 and 26, and four corners are fastened with bolts and nuts.

When stored in the rack 3, the bottom surface of the printed board 28 and the bottom surface 30 of the member 26 are inserted into the printed board insertion rail 23 to support both ends.

  In this way, the sandwich-type mounting structure that maintains the heat dissipation, vibration resistance, and shock resistance of the printed board is adopted, so two different types of printed boards can be used as inexpensive unit racks on the market. Can be implemented.

  Further, it is possible to prevent the center of gravity of the laminated printed boards 25 from being concentrated on one side.

  FIG. 5 is a perspective view of the power supply unit of the present embodiment as seen from the back side. The power receiving unit 8 is directly attached to the housing 1 using a rivet hole 16 provided in the left side bent surface 11 of the housing 1. In this way, because the housing is equipped with holes that can directly rivet the internal mounting equipment and the members that attach them, the vibration and impact transmitted to the internal equipment can be mitigated by the rivet fastening effect, and the mounting man-hours are also reduced. can do.

  The power receiving unit 8 receives power from the outside at the front of the terminal block 31, wiring from the back side to the primary side of the upper terminal of the FFB 32, and a power supply branch mounted below the FFB 32 from the secondary side of the lower terminal of the FFB 32 Wired to the connector 33.

  The power receiving unit 8 supplies power to each printed board mounted on the rack 3, receives power received from the outside, and supplies power to each printed board via the FFB 32 by a connector that branches the power. At this time, in order to suppress the influence of noise, vibration, and impact from the outside, a short wiring is desirable, and the power received from the outside is received by the terminal block 31 on the front side of the unit, and the FFB 32 on the back side of the unit via the terminal block 31. By entering the primary side of the terminal, entering the power branch connector 33 below the secondary side of the FFB 32, and supplying power to each printed board from the power branch connector 33, a short wiring is realized.

  As described above, since the wiring of this embodiment has a short mounting arrangement from power reception to branching, the vibration and impact applied to the mobile vehicle that continues repeatedly are small, and disconnection does not occur due to slight vibration.

  FIG. 6 is a perspective view of the interface unit 9 of this embodiment as viewed from the back side. The interface unit 9 is directly attached to the housing 1 using a rivet hole 16 provided on the back surface of the housing 1, thereby improving durability and reducing the number of processing steps.

  The interface unit 9 is a unit for outputting a large number of communication control signals inside the apparatus to the outside. The interface unit 9 also has a large number of wirings, and the wiring is concentrated on the terminal block 34 and the connector 35. Wiring damage is likely to occur. For this reason, the wiring clamp 36 is provided in the vicinity of the back connection portion of the terminal block 34 and the connector 35, the metal fitting for the wiring clamp 36 is attached in the vicinity of the connector on the back side of the unit and the outlet of the base, and these wirings are fixed together. This improves the durability.

It is a perspective view of the control apparatus which is one Example of this invention. It is a perspective view which shows the housing | casing of 1 member bending process of the control apparatus of a present Example. It is a perspective view which shows the state which mounts | wears with the control unit of a present Example. It is a perspective view which shows the mounting structure of the communication module of a present Example. It is the perspective view which looked at the power supply unit of a present Example from the back surface. It is the perspective view which looked at the interface unit of a present Example from the back surface.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Case 2,16 Rivet hole 3 Rack 4 Power supply module 5 CPU module 6 Communication module 7 HUB module 8 Power receiving unit 9 Interface unit 10 Ceiling folding surface 11 Left side folding surface 12 Right side folding surface 13 Bottom folding surface 14 Bolt hole 15 Side lower bent surface 18 Ceiling member 19 Back member 20 Control unit 23 Print board insertion rail 24, 26 Member 25, 28 Print board 27 Dummy panel 29 Hole 30 Bottom face 31, 34 Terminal block 32 FFB
33 Power supply branch connector 35 Connector 36 Wiring clamp

Claims (5)

A hole provided in a bent portion formed by bending a single plate material at a plurality of locations, forming a ceiling bent surface, a left and right bent surface, and a bottom bent surface with respect to the back surface. A box-shaped housing formed by rivet fastening the bent surface portion, a CPU module disposed in an upper portion of the housing and mounted on a rack, and disposed in a lower portion of the housing. A power receiving unit and an interface unit that are rivet-fastened to a rivet hole provided in a bent surface to be formed, and the CPU module includes a first printed board and a first member that is attached to the back surface of the first printed board; A second printed circuit board having a different size from the first printed circuit board, and a second printed circuit board provided on a side opposite to the first member of the second printed circuit board It is composed of wood, the first by a member and a second member held by sandwiching the second printed circuit board, and inserted into the first printed circuit board and the rack of the printed board insertion rail by a second member control apparatus.   The control device according to claim 1, wherein a corner portion in which a bent surface that is a bottom surface of the device and a bent surface that is a side surface of the device are combined in a trapezoidal shape.   The control device according to claim 2, wherein a bolt hole and a screw hole for fixing the trapezoidal shape portion to a moving vehicle are provided.   The power receiving unit that is rivet-fixed to the housing receives power drawn from outside at the front of the terminal block, wiring from the back side of the terminal block to the primary side of the upper terminal of the FFB, and the lower terminal of the FFB The control device according to claim 1, wherein the control device is wired from a secondary side to a power distribution connector mounted under the FBB.   2. The control according to claim 1, wherein a wiring clamp is provided at a rear outlet of each output connector or terminal block in order to collectively fix external output wires routed inside the interface unit that is rivet-fixed to the housing. apparatus.

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