JP2015030339A - Attachment method of electronic equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an attachment method of electronic equipment which improves operability and positioning accuracy when attaching electronic equipment to a base member via a pair of stays.SOLUTION: First, a bottom surface of electronic equipment 33 is mounted onto a mounting surface 31a of a base member 31 from the above side, subsequently, a stay 32 is fastened such that a guide pin 33c projected upward from the electronic equipment 33 faces a guide hole 32f formed on the stay 32, subsequently, a bolt 36 which pierces the stay 32 from above to below is screwed into the electronic equipment 33, then, the electronic equipment 33 is drawn up by the bolt 36 while being guided through the guide hole 32f by the guide pin 33c and is separated from the mounting surface of the base member 31 and, in such a state that the electronic equipment 33 is fastened to the stay 32, a predetermined gap α is formed between the mounting surface 31a of the base member 31 and the bottom surface of the electronic equipment 33. Thereby, the electronic equipment 33 is automatically positioned for the base member 31, and can be fastened in the prescribed positional relationship and the operability when attaching the electronic equipment 33 is improved.

Description

  The present invention relates to an electronic device mounting method for mounting the electronic device to the base member via a pair of stays so that a predetermined gap is formed between the mounting surface of the base member and the bottom surface of the electronic device. .

  Patent Document 1 listed below is a battery in which a storage battery is mounted on an upper surface of a shelf portion that extends horizontally from a chassis frame of an automobile and an electronic device such as an inverter, an electronic control box, or a radiator is attached to the lower surface of the shelf portion via a bracket. Is known.

JP 2012-81830 A

  By the way, when an electronic device that generates heat when energized is attached to a base member via a stay, if the electronic device is attached with a gap formed between the electronic device and the base member, the electronic device receives heat when the base member generates heat. Can be prevented. However, if the electronic device is to be mounted with a gap between the electronic device and the base member, the posture of the electronic device becomes unstable and the workability of the mounting work is reduced, or the positioning accuracy of the electronic device is reduced. There is a problem.

  The present invention has been made in view of the above circumstances, and an object thereof is to improve workability and positioning accuracy when an electronic device is attached to a base member via a pair of stays.

  In order to achieve the above object, according to the first aspect of the present invention, a pair of the electronic devices are arranged such that a predetermined gap is formed between the mounting surface of the base member and the bottom surface of the electronic device. A method for mounting an electronic device to be attached to the base member via a stay, wherein the bottom surface of the electronic device is mounted on the mounting surface of the base member from above, and either the electronic device or the stay A step of fixing the stay to the base member such that a guide pin protruding vertically from one side faces a guide hole formed on either the electronic device or the stay; and The electronic device mounting method is characterized by including a step of fastening the electronic device to the stay by screwing a bolt penetrating into the electronic device.

  According to the invention described in claim 2, in addition to the configuration of claim 1, the base member is a main body of a power control unit of a power storage device, and the electronic device is the power control unit. An electronic apparatus mounting method is proposed, which is an electronic control unit.

  The battery pack 12 of the embodiment corresponds to the power storage device of the present invention, the main body portion 31 of the PCU 26 of the embodiment corresponds to the base member of the present invention, and the convex portion 31a of the embodiment corresponds to the mounting of the present invention. Corresponding to the placement surface, the electronic control unit 33 of the embodiment corresponds to the electronic apparatus of the present invention.

  According to the configuration of the first aspect, first, the bottom surface of the electronic device is placed on the placement surface of the base member from above, and then the guide pin protruding vertically from either the electronic device or the stay is the electronic device or When the stay is fixed to the base member so as to face the guide hole formed on the other of the stays, and then a bolt that penetrates the stay from top to bottom is screwed into the electronic device, the guide hole is guided to the guide pin. While the electronic device is pulled up by the bolt and separated from the mounting surface of the base member, a predetermined gap is formed between the mounting surface of the base member and the bottom surface of the electronic device with the electronic device fastened to the stay. Is done. Accordingly, the electronic device can be automatically positioned with respect to the base member and fixed in a predetermined positional relationship, and workability when the electronic device is attached to the base member via the pair of stays is improved.

  According to the second aspect of the present invention, the base member is the main body of the power control unit of the power storage device, and the electronic device is the electronic control unit of the power control unit. Workability at the time of attaching the electronic control unit to the part can be improved.

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 an enlarged view of part 3 of FIG. 2. FIG. 4 is an exploded perspective view corresponding to FIG. 3. FIG. 5 is a sectional view taken along line 5-5 of FIG. Explanatory drawing of the procedure at the time of attaching an electronic control unit. The figure which looked at the electronic control unit from the upper part.

  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 stay 14 and a rear stay 15 extend from the front and rear of the case 13 to the outside in the vehicle width direction, and both ends thereof are fixed to the upper surface of the floor panel 11 with bolts 16. 12 is suspended and supported in the recess 11a.

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

  Between the front stay 14 and the rear stay 15, four battery modules 22 are supported. 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 with the stacking direction of the battery cells 23 aligned in the front-rear direction, and a pair of end plates 24, 24 are respectively connected to the front wall 17 of the front stay 14 and the front wall 17. Fastened to the rear wall 18 of the rear stay 15.

  A PCU (power control unit) 26 is mounted between the front wall 17 of the front stay 14 and the rear wall 18 of the rear stay 15 on the left side of the four battery modules 22. The PCU 26 includes a large main body 31 that houses an inverter that converts high-voltage direct current of the battery modules 22... Into three-phase alternating current, and a pair of stays 32 above a convex portion 31 a that protrudes from the upper surface of the main body 31. , 32 and a box-shaped electronic control unit 33. A cooling fan 30 is provided on the rear surface of the rear wall 18 of the rear stay 15 behind the PCU 26 to supply cooling air to the battery modules 22.

  Next, the support structure of the electronic control unit 33 for the main body 31 of the PCU 26 will be described with reference to FIGS.

  The stay 32 is formed by bending a metal plate into a predetermined shape, and includes a flat plate-like lower fixing portion 32a, a flat plate-like upper fixing portion 32b, and a columnar portion 32c that connects the lower fixing portion 32a and the upper fixing portion 32b. Is provided. The lower fixing portion 32a is provided with a positioning pin 32d that protrudes downward from the lower surface thereof, and one bolt hole 32e that penetrates the upper and lower surfaces thereof, and the upper fixing portion 32b penetrates the upper and lower surfaces thereof. Two guide holes 32f and 32f and one bolt hole 32g are provided.

  On the other hand, arm portions 33b and 33b protrude from a pair of side surfaces 33a and 33a facing each other of the electronic control unit 33, and each arm portion 33b has two guide pins 33c and 33c protruding upward from the upper surface thereof. And one nut portion 33d. The tips of the guide pins 33c and 33c are tapered tapered. Further, one pin hole 31c and one weld nut 34 are provided on the upper wall 31b of the main body 31 of the PCU 26 at positions facing the lower side of the arm portion 33b of the electronic control unit 33, respectively.

  The stay 32 is fixed to the main body 31 by screwing the bolt 35 penetrating the bolt hole 32e of the lower fixing portion 32a into the weld nut 34, and the arm portion 33b of the electronic control unit 33 is fixed to the upper side of the stay 32. The bolt 36 penetrating the bolt hole 32g of the portion 32b is fixed to the stay 32 by screwing into the nut portion 33d of the arm portion 33b.

  Next, a procedure for fixing the electronic control unit 33 to the main body 31 of the PCU 26 via the pair of stays 32, 32 will be described with reference to FIG.

  First, as shown in FIG. 6A, after the electronic control unit 33 is placed on the upper surface of the convex portion 31a of the main body 31 in a state of being roughly positioned visually, the lower fixing portion 32a of each stay 32 is fixed. The positioning pin 32d is fitted into the pin hole 31c (see FIG. 4) of the main body 31, and the guide holes 32f and 32f of the upper fixing portion 32b are fitted to the tips of the guide pins 33c and 33c of the electronic control unit 33. In this state, the stay 32 is temporarily placed on the main body 31. At this time, when the guide holes 32 f and 32 f of the upper fixing portion 32 b of the stay 32 do not fit into the tips of the guide pins 33 c and 33 c of the electronic control unit 33, the electronic control unit placed on the convex portion 31 a of the main body portion 31. Since the position of 33 is largely shifted, the position of the electronic control unit 33 may be corrected. Since the tips of the guide pins 33c and 33c are tapered, the operation of fitting the guide holes 32f and 32f of the upper fixing portion 32b to the guide pins 33c and 33c is easy.

  The tips of the guide pins 33c and 33c do not necessarily need to be fitted into the guide holes 32f and 32f of the upper fixing portion 32b, but are opposed to the lower sides of the guide holes 32f and 32f of the upper fixing portion 32b so as to be fitted. Just fine.

  Subsequently, as shown in FIG. 6B, the bolts 35 that pass through the bolt holes 32e (see FIG. 4) of the lower fixing portions 32a of the respective stays 32 are screwed into the weld nuts 34, whereby the stays 32 are fixed. Fastened to the main body 31. At this time, the positioning pin 32d of the stay 32 is fitted into the pin hole 31c of the main body 31, so that the stay 32 is automatically prevented from rotating and fixed at the correct position.

  Subsequently, as shown in FIG. 6C, the bolt 36 that penetrates the bolt hole 32 g (see FIG. 4) of the upper fixing portion 32 b of each stay 32 is screwed into the nut portion 33 d of the arm portion 33 b of the electronic control unit 33. When tightened together, the electronic control unit 33 is pulled up by the bolt 36 while guiding the guide pins 33c, 33c into the guide holes 32f, 32f of the upper fixing portion 32b, and the upper surface of the convex portion 31a of the main body portion 31 is lifted up. A gap α is formed between the lower surface of the electronic control unit 33. The gap α can prevent the electronic control unit 33 from directly receiving heat when the main body 31 of the electronic control unit 33 generates heat. When the screwing of the two bolts 36 and 36 is completed, the pair of arm portions 33b and 33b are fastened to the lower surfaces of the upper fixing portions 32b and 32b of the pair of stays 32 and 32, so that the electronic control unit 33 is It is fixed to the main body 31 via a pair of stays 32, 32.

  As described above, according to the present embodiment, even when the electronic control unit 33 is fixed to a high position via the pair of stays 32, 32, the electronic control unit 33 is placed on the convex portion 31a. Since the bolts 35, 35, 36, 36 can be screwed in the state, the workability is remarkably improved by avoiding the situation where the stays 32, 32 fall down due to the weight of the electronic control unit 33. Moreover, the electronic control unit 33 can finally be accurately positioned by fitting the guide pins 33c and 33c having tapered tips with the guide holes 32f and 32f without performing precise positioning work. Automatic assembly using a robot with low accuracy is also possible.

  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, in the embodiment, the guide pin 33c protruding upward on the electronic control unit 33 side is fitted in the guide hole 32f formed on the stay 32 side, but the guide pin protruding downward on the stay 32 side is fitted. Similar effects can be achieved by fitting into a guide hole formed on the electronic control unit 33 side.

  In the embodiment, the electronic control unit 33 is placed on the upper surface of the convex portion 31a of the main body 31 to perform the assembling work. However, the convex portion 31a is not essential, and the flat surface (the mounting surface) of the main body 31 is placed. ) The electronic control unit 33 may be placed on the assembly work.

  The electronic device of the present invention is not limited to the electronic control unit 33 of the embodiment.

  The base member of the present invention is not limited to the main body 31 of the PCU 26 according to the embodiment.

  In the embodiment, the stay 32 is prevented from rotating by providing the positioning pin 32d on the stay 32. Instead of providing the positioning pin 32d on the stay 32, a part of the stay 32 is bent, and the bent portion is the main body. The rotation may be prevented by fitting into a hole formed in the portion 31.

  In the embodiment, the stay 32 is fixed by screwing a bolt 35 to a weld nut 34 provided on the upper wall 31b of the main body 31. On the contrary, the stay 32 is protruded upward from the upper wall 31b. The stay 32 may be fixed by screwing a nut onto the weld bolt, whereby the positioning pin 32d can be eliminated.

  Further, as in another embodiment shown in FIG. 7, the lower bolt 35 penetrating the bolt hole 32 e of the lower fixing portion 32 a of the stay 32 and the bolt hole 32 g of the upper fixing portion 32 b of the stay 32 are penetrated. The upper bolt 36 may be offset when viewed from above. Thereby, it becomes possible to operate the lower bolt 35 with a tool from the upper side without interfering with the upper fixing portion 32b, and workability is improved.

12 Battery pack (power storage device)
26 Power Control Unit 31 PCU 26 Main Body (Base Member)
31a Convex part (mounting surface)
32 Stay 32f Guide hole 33 Electronic control unit (electronic equipment)
33c Guide pin 36 Bolt α Clearance

Claims (2)

The electronic device (33) is paired with a pair of stays (32) so that a predetermined gap (α) is formed between the mounting surface (31a) of the base member (31) and the bottom surface of the electronic device (33). An electronic device mounting method for mounting to the base member (31) via:
Placing the bottom surface of the electronic device (33) on the placement surface (31a) of the base member (31) from above;
A guide pin (33c) protruding vertically from either the electronic device (33) or the stay (32) has a guide hole formed in the other of the electronic device (33) or the stay (32). Fixing the stay (32) to the base member (31) so as to face (32f);
Fastening the electronic device (33) to the stay (32) by screwing a bolt (36) penetrating the stay (32) from top to bottom into the electronic device (33). A method of mounting an electronic device as a feature.   The base member is a main body (31) of a power control unit (26) of the power storage device (12), and the electronic device is an electronic control unit (33) of the power control unit (26). The mounting method of the electronic device of Claim 1 characterized by these.

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