JP6094889B2 - Electronic device mounting structure - Google Patents

Description

  The present invention provides an electronic device for attaching the electronic device to the attached member by inserting a stud bolt provided on one of the electronic device and the attached member into a bolt hole provided on the other and fastening with a nut. It relates to the mounting structure of equipment.

  Japanese Patent Application Laid-Open Publication No. 2004-228561 discloses a structure in which a junction block (junction board) including a contactor and a fuse is attached to one side surface of a power storage device including a plurality of storage batteries.

JP 2011-15490 A

  By the way, when attaching a junction board to one side of a power storage device with a stud bolt and nut using a robot, it is difficult to insert the stud bolt into the bolt hole in a robot with low positioning accuracy, and there is a limit to automation. was there.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to facilitate positioning when an electronic apparatus is attached to a member to be attached with a stud bolt and a nut.

In order to achieve the above object, according to the invention described in claim 1, a stud bolt provided in one of the electronic device and the attached member is inserted into a bolt hole provided in either one and An electronic device mounting structure for mounting the electronic device to the mounted member by fastening, the positioning pin provided on either the electronic device or the mounted member, and the other provided on the other A pin hole into which the positioning pin is fitted, and the bolt hole has a certain gap with the stud bolt over its entire length, and the difference in diameter between the positioning pin and the pin hole is A mounting structure for an electronic device is proposed in which the diameter difference between the stud bolt and the bolt hole is smaller, and the length of the positioning pin is shorter than the length of the stud bolt.

  According to the second aspect of the present invention, in addition to the configuration of the first aspect, an electronic apparatus mounting structure is proposed in which the tip of the positioning pin is tapered.

  According to the invention described in claim 3, in addition to the configuration of claim 1 or 2, the stud bolt is provided on the attached member side, and the positioning pin is provided on the electronic device side. An electronic device mounting structure is proposed.

  According to the invention described in claim 4, in addition to the structure of any one of claims 1 to 3, the electronic device is a junction board interposed between a storage battery and a load, Proposed mounting structure for electronic equipment, wherein a junction board is provided with a contactor that cuts off an electrical connection between the storage battery and the load, and a pair of gripped portions are provided at positions sandwiching the contactor Is done.

  The front holding member 14 of the embodiment corresponds to the mounted member of the present invention, the battery cell 23 of the embodiment corresponds to the storage battery of the present invention, and the junction board 27 of the embodiment corresponds to the electronic device of the present invention. Corresponding to the device, the wall portion 27b of the embodiment corresponds to the gripped portion of the present invention.

According to the configuration of claim 1, the electronic device and the attached member are inserted into the bolt holes provided on either one of the electronic device and the attached member and fastened with the nut, thereby attaching the electronic device to the attached member. Attach to. A positioning pin provided on one of the electronic device and the mounted member, and a pin hole provided on either one of the electronic device and the mounting member to fit the positioning pin. The bolt hole extends between the stud bolt and the entire length. Since there is a certain gap, the diameter difference between the positioning pin and the pin hole is smaller than the diameter difference between the stud bolt and the bolt hole, and the length of the positioning pin is shorter than the length of the stud bolt. After approaching the mounting member, inserting the stud bolt into the bolt hole and roughly positioning both, the electronic device is further moved closer to the mounted member, and the positioning pin is fitted into the pin hole to position both with high accuracy. By tightening with a nut, even when mounting an electronic device using a robot with low positioning accuracy, the electronic device must not be positioned accurately with respect to the mounted member. It can be attached, et al.

  According to the second aspect of the present invention, since the tip of the positioning pin is tapered, the positioning pin can be easily fitted into the pin hole even if the diameter difference between the positioning pin and the pin hole is small.

  According to the configuration of the third aspect, since the stud bolt is provided on the attached member side and the positioning pin is provided on the electronic device side, the electronic device can be attached to the attached member with high accuracy.

  According to the fourth aspect of the present invention, the electronic device is a junction board interposed between the storage battery and the load, and the junction board is provided with a contactor for cutting off the electrical connection between the storage battery and the load. Since the pair of gripped portions are provided at a position between which the robot is sandwiched, when the junction board is automatically assembled using the robot, the pair of gripped portions can be easily gripped by the gripping tool of the robot. The contactor is a heavy part of the parts provided on the junction board, and the pair of gripped parts provided at the position where the contactor is sandwiched are gripped by the robot gripper to prevent the junction board from being deformed by its own weight. It can be gripped firmly.

The perspective view of the vehicle body rear part in which a battery pack is mounted. The exploded perspective view of a battery pack. FIG. 3 is a three-direction arrow view of FIG. 2. The figure which shows the state which removed the junction board in FIG. FIG. 5 is an enlarged sectional view taken along line 5-5 in FIG. Action explanatory drawing at the time of attachment of a junction board.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

  As shown in FIGS. 1 and 2, a recess 11a that is recessed downward is formed in a floor panel 11 of a trunk room 10 at the rear of a hybrid vehicle body, and a battery pack 12 is mounted in the recess 11a. The battery pack 12 includes a case 13 made of a synthetic resin case body 13a formed in a container shape whose upper surface is open, and a metal cover 13b formed in a plate shape and closing the upper surface opening of the case body 13a. Is provided. A metal front holding member 14 and a rear holding member 15 extend outward in the vehicle width direction from the front and rear of the case 13, and both ends thereof are fixed to the upper surface of the floor panel 11 with bolts 16. The battery pack 12 is supported by being suspended in the recess 11a.

  The intermediate portions in the vehicle width direction of the front holding member 14 and the rear holding member 15 are respectively plate-like front walls 17 and rear walls 18, and the bottom wall 19 integrally forms the lower end of the front wall 17 and the rear wall 18. In addition, the left ends of the front wall 17 and the rear wall 18 are connected by the left side wall 20, and the right ends of the front wall 17 and the rear wall 18 are connected by the right side wall 21.

  Four battery modules 22 are supported between the front holding member 14 and the rear holding member 15. The battery module 22 is formed by stacking twelve battery cells 23 made of, for example, a lithium ion battery, and connecting four corners of a pair of end plates 24 and 24 stacked at both ends in the stacking direction with four frames 25. Configured. The four battery modules 22 are juxtaposed in the vehicle width direction in a state in which the stacking direction of the battery cells 23 is aligned in the front-rear direction, and the pair of end plates 24, 24 are respectively the front wall 17 of the front holding member 14. Further, the rear holding member 15 is fastened to the rear wall 18.

  An inverter that converts the high-voltage DC current of the battery modules 22 to three-phase AC between the front wall 17 of the front holding member 14 and the rear wall 18 of the rear holding member 15 on the left side of the four battery modules 22. In addition, a PCU (Power Control Unit) 26 including a DC-DC converter or the like for stepping down the high-voltage direct current to a low-voltage current is mounted.

  A junction board 27 for connecting the battery modules 22... And the PCU 26 via a cable (not shown) is fixed to the front surface of the front holding member 14. The junction board 27 is provided with contactors 28 and 28 and a fuse 29 for cutting off the electrical connection between the battery modules 22... And the PCU 26. A cooling fan 30 is provided on the rear surface of the rear wall 18 of the rear holding member 15 behind the PCU 26 to supply cooling air to the battery modules 22.

  Next, the structure of the junction board 27 will be described with reference to FIGS.

  The junction board 27 is a substantially rectangular plate-like member, and two contactors 28, 28 are fixed to the front side thereof with bolts 31, and a fuse 29 is fixed with bolts 32, 32. Four stud bolts 33 are planted on the front surface of the front holding member 14, and four bolt holes 27 a into which these stud bolts 33 are fitted are formed at the four corners of the junction board 27. . Therefore, the junction board 27 is fixed to the front surface of the front holding member 14 by screwing and fastening the nuts 34 to the stud bolts 33 with the bolt holes 27a fitted to the stud bolts 33. The On the front surface of the junction board 27, wall portions 27b and 27b located on both sides of the two contactors 28 and 28 in the vehicle width direction project.

  A total positive terminal 35 and a total negative terminal 36 for taking out current from both ends of the four battery modules 22 are provided on the front surface of the front holding member 14. The total plus terminal 35 and the total minus terminal 36 are constituted by bolts. The connection terminals 37 and 38 provided on the rear surface side of the junction board 27 are fitted to the total plus terminal 35 and the total minus terminal 36, and the junction board 27 is connected to the junction board 27. The battery modules 22 and the junction board 27 are electrically connected to each other by fastening with nuts 39, 39 through the formed openings 27c, 27c.

  On the upper edge of the junction board 27, two positioning pins 40, 40 projecting rearward are provided. Conical tapered portions 40a and 40a that are tapered toward the rear are formed at the tip portions of the positioning pins 40 and 40, respectively. The front holding member 14 is formed with pin holes 14a and 14a into which the positioning pins 40 and 40 can be fitted.

  As apparent from FIG. 5, the difference G1 between the radius of the positioning pin 40 and the radius of the pin hole 14a is set smaller than the difference G2 between the radius of the stud bolt 33 and the radius of the bolt hole 27a. In other words, the positioning pin 40 and the pin hole 14a are closely fitted, but the stud bolt 33 and the bolt hole 27a are loosely fitted. The protruding length L1 of the positioning pin 40 is set to be smaller than the protruding length L2 of the stud bolt 33.

  Next, an operation when the junction board 27 is attached to the front surface of the front holding member 14 will be described.

  The assembly work of the junction board 27 is performed by the robot, and is performed by gripping the pair of wall portions 27b and 27b of the junction board 27 with the pair of gripping claws 41 and 41 (see FIG. 3) of the robot. Of the components attached to the junction board 27, the contactors 28, 28 are the heaviest components, and the gripping claws 41, 41 grip the wall portions 27b, 27b provided close to the left and right sides of the contactors 28, 28. By doing so, the junction board 27 can be firmly gripped while preventing bending due to its own weight.

  Since the assembly work by the robot is less accurate than the manual work visually observed by the worker, for example, when the bolt holes 27a provided in the junction board 27 are fitted to the stud bolts 33 provided in the front holding member 14. The stud bolts 33 may not be smoothly fitted into the bolt holes 27a. According to the present embodiment, it is possible to solve the above problems and enable the assembly work by the robot.

  That is, as shown in FIG. 6 (A), when the junction board 27 gripped by the gripping claws 41, 41 of the robot is approached toward the front surface of the front holding member 14, as shown in FIG. 6 (B), The stud bolts 33 longer than the positioning pins 40 are first fitted into the bolt holes 27 a of the junction board 27. At this time, the difference G2 (see FIG. 5) between the radius of the stud bolts 33... And the radius of the bolt hole 27a is set sufficiently large. The bolt holes 27a can be smoothly fitted.

  Subsequently, when the junction board 27 is further moved closer to the front holding member 14, the tapered portions 40 a and 40 a at the tips of the positioning pins 40 and 40 are fitted into the pin holes 14 a and 14 a of the front holding member 14. At this time, since the tips of the tapered portions 40a, 40a are sufficiently thin, even if the bolt holes 27a are displaced to the maximum with respect to the stud bolts 33, the positioning pins 40, 40 are positioned in the pin holes 14a, 14a. Can be fitted smoothly. When the positioning pins 40, 40 are thus fitted in the pin holes 14a, 14a, the difference G1 (see FIG. 5) between the radius of the positioning pin 40 and the radius of the pin hole 14a is set sufficiently small. The junction board 27 can be accurately positioned with respect to the front holding member 14, and the junction board 27 is fastened by screwing the nuts 34 to the stud bolts 33 to fasten the junction board 27. The member 14 can be fixed at a correct position.

  The embodiments of the present invention have been described above, but various design changes can be made without departing from the scope of the present invention.

  For example, the electronic device of the present invention is not limited to the junction board 27 of the embodiment, and the mounted member of the present invention is not limited to the front holding member 14 of the embodiment.

  In the embodiment, the stud bolts 33 are provided on the front holding member 14 side and the positioning pins 40 are provided on the junction board 27 side. However, the positional relationship is reversed and the positioning is performed on the front holding member 14 side. The pins 40 and 40 may be provided, the stud bolts 33 may be provided on the junction board 27 side, and both the stud bolts 33 and the positioning pins 40 and 40 may be provided on the front holding member 14 side. Both the stud bolts 33 ... and the positioning pins 40, 40 may be provided on the side.

  Further, the number of stud bolts 33 and the number of positioning pins 40 are not limited to the embodiment.

  In the embodiment, the junction board 27 is attached by a robot. However, an operator may attach the junction board 27 manually, and in this case, the positioning of the junction board 27 is facilitated and workability is improved.

14 Front holding member (attached member)
14a pin hole 23 battery cell (storage battery)
27 Junction board (electronic equipment)
27a Bolt hole 27b Wall (gripped part)
28 Contactor 33 Stud Bolt 34 Nut 40 Positioning Pin

Claims (4)

By inserting the stud bolt (33) provided in either one of the electronic device (27) and the mounted member (14) into the bolt hole (27a) provided in either one and fastening with the nut (34), An electronic device mounting structure for mounting the electronic device (27) to the mounted member (14),
A positioning pin (40) provided on one of the electronic device (27) and the mounted member (14), and a pin hole (14a) provided on either of the electronic device (27) and the positioning pin (40). The bolt hole (27a) has a certain gap between the bolt hole (27a) and the stud bolt (33) over its entire length, and the positioning pin (40) and the pin hole (14a) The diameter difference is smaller than the diameter difference between the stud bolt (33) and the bolt hole (27a), and the length of the positioning pin (40) is shorter than the length of the stud bolt (33). Equipment mounting structure.   The electronic device mounting structure according to claim 1, wherein a tip of the positioning pin (40) is tapered.   The said stud bolt (33) is provided in the said to-be-attached member (14) side, and the said positioning pin (40) is provided in the said electronic device (27) side, The Claim 1 or Claim 2 characterized by the above-mentioned. The mounting structure of the electronic device described. The electronic device (27) is a junction board (27) interposed between a storage battery (23) and a load, and the junction board (27) has an electrical connection between the storage battery (23) and the load. The contactor (28) which interrupts | blocks a contact is provided, A pair of to-be-gripped part (27b) is provided in the position which pinches | interposes the said contactor (28), Any one of Claims 1-3 characterized by the above-mentioned. The mounting structure of the electronic device described.

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