JP5067207B2 - In-vehicle electrical junction box - Google Patents

Description

  The present invention relates to an on-vehicle electrical junction box, and more specifically, in an electrical junction box provided with a storage part for a later-inserted component in the electrical junction box, electrical components such as bus bars, relays, and fuses attached to the electrical junction box. This prevents the interference between the electric wire to be connected to the post-insertion part, protects the electric wire, and ensures the maintainability of the electric part.

In an electric connection box mounted on an automobile or the like, as disclosed in Japanese Patent Application Laid-Open No. 2006-174657 (Patent Document 1), a large opening is provided in the electric connection box and the electric connection box is attached to the automobile. In the assembly process, there is a case where the rear connection part is accommodated in the opening and the electrical junction box is completely assembled.
Thus, in the electrical junction box that accommodates the later-inserted part, when it is necessary to bolt and connect a conductor such as a bus bar that faces the accommodating part side of the later-inserted part and the terminal of the electric wire terminal, It is necessary to prevent interference with later-inserted parts.
In Patent Document 1, after the terminal of the electric wire terminal and the bus bar are bolted and connected, a cover that covers the bolted connecting portion and the electric wire is provided so that the electric wire does not interfere with the later-inserted parts.

By providing the cover, it is possible to prevent the bolt fastening portion and the electric wire from interfering with and coming into contact with the later-inserted parts. However, when the cover is connected to the case body via the thin hinge portion, the case body The structure of is complicated. In addition, when the cover is provided separately from the case and locked together, there is a problem that the number of parts increases and the number of attaching the cover is increased.
Furthermore, when the maintenance is performed by disconnecting the bus bar from the terminal of the electric wire terminal, the bolt fastening portion is closed by the cover, so that if the cover is of a folding type, the relationship between the folded cover and the case main body. It is necessary to release the stop and open it, and with a separate cover, it is necessary to remove the cover by releasing the connection with the case body.

JP 2006-174657 A

  The present invention has been made in view of the above problems, and is connected to electrical components such as bus bars, relays, and fuses attached to the electrical junction box in an electrical junction box provided with a storage part for a later-inserted component. Protect the electric wire from interfering with the later-inserted parts, and make it easy to insert the bolt jig into the bolt fastening part between the relay of the electric part, the terminal of the fuse and the terminal of the electric wire terminal, etc. The problem is to provide an electrical junction box with excellent maintainability.

To solve the above problems, the present invention is provided with a housing portion of the last-part open bus bar, one side of the case body mount the electric parts including the fuses and relays,
A partition wall for preventing interference between the electric wire connected to the electrical component mounted on the case body and the later-inserted component accommodated in the accommodated portion of the later-inserted component is provided as the inner wall of the accommodating portion.
A maintenance hole for maintaining the electrical component mounted on the case body is provided in a portion facing the opening of the partition wall , and the electrical component mounted on the case body faces the maintenance hole. A bolt fastening portion that bolts either one or both of the bus bar and the terminal of the electric wire terminal to the terminal of the fuse or relay constituting
An in-vehicle electrical junction box is provided in which a bolt jig can be inserted into the bolt fastening portion through the maintenance hole of the partition wall from the opening of the housing portion .

As described above, according to the present invention, a partition wall is provided between a housing part for a later-inserted part provided to be opened at one side of the case body and an electrical part such as a bus bar, a relay, or a fuse attached to the case body. the order is provided, it is possible to wire connecting these electrical components do not interfere with the last-parts, and so as not drawn into the housing portion of the last-part guide to the lower cover side.
Thus, since the partition wall is provided integrally with the case main body, it is not necessary to bend the cover after wiring the wire as in Patent Document 1, or to assemble the cover afterwards, without increasing the number of parts, and Assembling workability of after-insert parts can be improved.
Further, since the maintenance hole is provided in the partition wall, maintenance treatment is provided from the opening to the storage part of the later-inserted part with respect to the electrical parts such as the bus bar and the fuse disposed via the storage part and the partition wall. A tool can be inserted and maintenance can be performed through a maintenance hole provided in the partition wall .

As described above , facing a maintenance hole provided in the partition wall, a terminal of a fuse or a relay constituting the electrical component attached to the case body, either one of the bus bar and the terminal of the electric wire terminal or A bolt fastening portion for fastening both the bolts is positioned, and a bolt jig can be inserted into the bolt fastening portion through the maintenance hole in the partition wall. A lid portion for opening and closing the bolt fastening portion of the electrical component facing the maintenance hole is attached to the electrical component so that the lid can be easily opened and closed.

In addition, the specific configuration of the housing part for the post-insertion component is that the case body connected to the outer ends of the left and right side walls is provided with left and right side walls of the housing part from the left and right ends of the partition wall serving as the inner side wall of the housing part. The outer peripheral wall is an opening that exposes the outer surface of the later-inserted component, and only the holding frame that holds the lower end of the later-inserted component is provided continuously with the left and right sidewalls,
The left and right side walls are provided with a lock portion for locking and coupling with the rear insert component, and the lower portion of the housing portion is covered with a lower cover coupled to the case body.

  Further, the lower cover is provided with an electric wire outlet, the electric outlet is formed at a position away from the lower position of the housing part for the rear-entry component, and the position facing the lower end of the partition wall from the bottom wall of the lower cover A partition wall is protruded to prevent the electric wire from being pulled out to the lower side of the later-inserted part.

The post-insertion component housed in the housing portion on the outer surface side of the partition wall is a power distributor (PD) having a heat sink on the outer surface.
The PD is housed in a housing portion provided with a large opening in the outer peripheral wall of the case body, and the heat dissipation plate is positioned facing the opening to enhance the heat dissipation performance of the PD.

  As described above, in the electrical junction box in which the housing part for the later-inserted part of the present invention is provided with one side of the case body opened, the electrical wires connected to electrical parts such as bus bars, fuses, and relays attached to the case body; Since the partition wall for preventing interference with the rear-inserted part is provided in the case body, a cover that is bent at the thin hinge portion or a separate part cover as in Patent Document 1 can be eliminated.

  In addition, since the maintenance hole is provided in the partition wall, if a jig is inserted from the opening, for example, the terminal of the fuse or relay constituting the electrical component and the terminal of the electric wire terminal are bolted and released. Can be easily performed, and the maintainability is not hindered by providing the partition wall.

Hereinafter, an embodiment of an electric junction box mounted on an automobile of the present invention will be described with reference to the drawings.
The electrical junction box is composed of a relay box. The relay box 1 includes a case body 2, a lower cover 3 that is locked to the lower portion of the case body 2, and an upper cover (not shown) that is locked to the upper portion of the case body 2. Yes.

  As shown in FIGS. 1 to 3, the case body 2 is provided with a housing portion 6 for housing a later-inserted component 5 made of a power distributor (PD) on one side. FIG. 1 is a plan view of the case body 2 in a state in which the later-inserted component 5 is accommodated in the accommodating portion 6, and FIGS. 2 and 3 are perspective views in a state in which the later-inserted component 5 is not accommodated.

The housing part 6 provided to be greatly opened on one side of the case body 2 is provided on the partition wall 10 serving as the inner wall surrounding the housing part 6, the left and right ends of the partition wall 10, and the outer peripheral wall 2 a of the case body 2. The edge of the opening 2 c and the left and right ends of the partition wall 10 are surrounded by continuous left and right side walls 11 and 12. And the holding frame part 13 which continues the lower end of the outer edge part of the right-and-left side walls 11 and 12 is provided in the lower part of the said opening 2c. As described above, the accommodating portion 6 has a large opening 2 c on the outer surface side and is open at the top and bottom, and the lower portion of the lower end opening is covered with the bottom wall of the lower cover 3.
Lock frames 11 a and 12 a are provided on the inner surfaces of the left and right side walls 11 and 12, and a fitting groove portion 13 a is provided on the upper surface of the holding frame portion 13.

In the vehicle body assembly process, the rear insert 5 is inserted into the housing 6 from above, and the lock claws 5a and 5b provided on the left and right outer surfaces of the rear insert 5 are locked to the lock frames 11a and 12a. The engaging projection (not shown) provided on the rear insert component 5 is fitted into the fitting groove 13a of the holding frame portion 13 and the rear insert component 5 is fitted and fixed in the housing portion 6. is doing.
In a state in which the post-insert component 5 made of PD is stored in the storage portion 6, the heat dissipation plate of the post-insert component 5 is positioned in the opening 2c on the outer surface side to enhance the heat dissipation effect.

The upper end 10a of the partition wall 10 is set at a position slightly higher than the frame portion 2b provided in the case main body 2, and the lower end 10b is set substantially at the same position as the lower end of the frame portion 2b.
A projecting portion 10c is provided at the lower portion of the partition wall 10 by being slightly bent toward the housing portion 6 side. The projecting portion 10c reinforces the partition wall 10 and bends the lower portion toward the housing portion 6 so that the electric wire can be lowered to a fuse cavity of a fuse block 21 to be described later that is mounted inside the partition wall 10. The insertion workability at the time of insertion from the top is enhanced, and the insertion workability of the rear insertion part 5 from above is enhanced by not projecting the upper side.
In addition, a pair of rectangular maintenance holes 10d are provided at left and right positions sandwiching the protruding portion 10c. These maintenance holes 10d have arcuate upper corners, which serve as insertion guides for bolt jigs 50 described later.

  As schematically shown in FIG. 4, the case main body 2 is provided with a frame portion 2 b inside the outer peripheral wall 2 a and is provided with cavities 40, 41, 42 for block fitting. A fuse block 21 for attaching the fuse 20 is fitted and fixed in the cavity 40, and relay blocks 23 and 24 for attaching the relay 22 are fitted and fixed in the cavities 41 and 42.

  The cavity 40 serving as the fitting portion of the fuse block 21 is a large cavity extending from the portion along the partition wall 10 to the other end side facing and the outer peripheral wall 2a on the one side orthogonal thereto. Further, the cavity 41 serving as the fitting portion of the relay block 23 is a large cavity surrounded by the frame 2b and the outer peripheral wall 2b between the cavity 40 and the cavity 40. A cavity 42 serving as a fitting portion of the relay block 24 is provided on the outer peripheral wall side facing the partition wall 10.

  The fuse block 21 mounted in the cavity 40 protrudes from a stud bolt 46 connected to the terminal 45 of the power supply line terminal, and accommodates a bus bar (not shown) from which the stud bolt 46 is protruded. Further, the fuse block 21 is provided with a fuse cavity juxtaposed portion 21b in a portion 21a along the inner surface side of the partition wall 10, and the fuse cavity juxtaposed portion 21b is brought into contact with the inner surface of the partition wall 10 from the upper end to a required dimension. It is located.

As shown in FIG. 5, the terminals 7a of the fusible link 7, the terminal portion 15 of the bus bar, and the terminal 8 of the end of the electric wire W are provided below the left and right sides of the portion adjacent to the fuse cavity juxtaposed portion 21b. A cavity 21c that exposes a bolt fastening portion A that is fastened by a bolt 9 so as to face the partition wall 10 is provided.
After the terminal 7a of the fusible link 7, the terminal 8 of the electric wire terminal, and the terminal part 15 of the bus bar are connected by the bolt 9, the lid part 21x for closing the bolt fastening part A is detachable as shown in FIG. It is attached to the peripheral wall of the cavity 21c from below.
The lid portion 21x is slidably fitted with guide rail portions 21x-1 provided on both sides thereof to a guide rail portion 21c-1 facing the outer end of the peripheral wall portion of the cavity 21c, and is simply locked at the mounting position (see FIG. When the lid 21x is pulled from below, the simple lock is released and the lid 21x is pulled out.

  In the space C between the terminal 7 a of the fusible link 7, the terminal 8 of the electric wire terminal, the bolt fastening part A of the terminal part 15 of the bus bar and the partition wall 10, the fuse 20 of the fuse cavity juxtaposed part 21 b is connected. The electric wire W2 is pulled out and inserted. Therefore, the contact between the fusible link 7 and the terminal 8 of the electric wire terminal and the electric wire W2 is prevented by closing the bolt fastening portion A with the lid portion 21x.

  During maintenance of the bolt fastening portion A, the bolt fastening portion A is exposed by pulling out the lid portion 21x from below. The bolt fastening portion A is opposed to the maintenance hole 10d of the partition wall 10 so that the fastening with the bolt 9 can be released and the fastening with the bolt 9 can be maintained by the bolt jig 50 inserted through the maintenance hole 10d. .

Further, as shown in FIG. 7, the bottom wall 3a of the lower cover 3 that is locked to the lower portion of the case body 2 is inclined from the shallow bottom to the deep bottom, and the partition wall 10 extends from the bottom wall on the deep bottom side. A partition wall 3b is provided so as to face the lower end of the housing and project from the bottom wall of the case main body 2 to the space between the partition wall 3b and the partition wall 10 and the electric wire drawn from the rear insertion part 5 from the shallow side. Pull out.
The outlet part 5 and the fuse block 21, the fuse 20 attached to the relay block 23, 24, and the wire outlet connected to the relay 22 are connected to the bottom wall 3 a below the fuse block 21 and the lower end of the outer peripheral wall 2 a of the case body. Formed between.

In the electrical junction box 1 having the above-described configuration, the fuse block 21 and the relay blocks 23 and 24 are inserted into the cavities 40, 41, and 42 surrounded by the outer peripheral wall 2a and the frame portion 2b of the case body 2 from below to lock the case. It has stopped. A fuse 20 attached to each of the blocks 21, 23, 24 and an electric wire having a terminal connected to the relay 22 are connected to the blocks 21, 23, 24 and pulled out toward the lower cover 3, and between the case body 2 and the lower cover 3. The lower cover 3 is locked to the case body 2 by being drawn outward from the electric wire outlet formed in FIG.
At that time, the terminal 7a of the fusible link 7 of the fuse block 21, the terminal 8 of the end of the electric wire W1, and the terminal portion 15 of the bus bar are connected by bolts, and the electric wire W1 is also drawn out together with the electric wire to the lower cover 3 side. Further, the electric wire W2 drawn out from the lower end of the fuse capacity juxtaposed portion 21b of the fuse block 21 that contacts the inner surface side of the partition wall 10 passes through the inner surface of the partition wall 10, the lid portion 21x, and the space C to the lower cover 3 side. Pull out. The electric wire W2 is positioned at the wiring position to prevent interference with the later-inserted component 5 that is later inserted on the outer surface side of the partition wall 10.

As described above, the fuse block 21 to the electric connection box 1, with mounting the relay block 23 and 24, are assembled Me pre in a state of pulling out the wires W1, W2 connected, the side of the outer peripheral wall of the case body As shown in FIG. 2, the later-inserted part 5 is not accommodated in the later-inserted-part accommodating portion 6 provided to be opened.

In this state, a later-inserted component 5 made of a PD (power distributor) is inserted into the housing portion 6 from above at another place or a vehicle assembly line, and is assembled by lock coupling.
When the post-insertion component 5 is inserted, the electric wire W drawn from the fuse capacity parallel arrangement portion 21b of the fuse block 21 on the housing portion 6 side does not interfere with the post-insertion component 5 by the partition wall 10, and the electric wire W is protected. be able to. The electric wires connected to the post-insertion component 5 are drawn out to the lower cover 3 side, and are drawn outward from the electric wire outlets together with the electric wires connected to the blocks 21, 23 and 24 and the electric wires W1 and W2.

When the terminal 7a of the fusible link 7 of the fuse block 21, the terminal 8 of the electric wire W1, and the terminal portion 15 of the bus bar need to be unfastened for maintenance, the rear insert 5 is taken out of the housing portion 6, The lid portion 21x covering the bolt fastening portion A is removed.
In this state, as shown in FIG. 6A, the bolt jig 50 is made to reach the bolt fastening portion A through the maintenance hole 10d of the partition wall 10 so that the bolt 9 can be released and re-fastened. Maintainability.

In the electrical junction box 1 having the above-described configuration, the newly inserted component 5 accommodated in the accommodating portion 6 and the electric wire W2 connected to the fuse 20 of the fuse block 21 in the case body 2 are partitioned by the partition wall 10, and the fusible Since the electric wire W1 connected to the link 7 is also partitioned by the partition wall 10, the electric wires W1 and W2 can be prevented from interfering with the post-insertion component 5, and the electric wire can be protected.
Moreover, since the maintenance hole 10d is provided in the partition wall 10, even if the partition wall 10 for protecting the electric wire exists, the maintenance bolt jig 50 can be inserted through the maintenance hole 10d, and the bolt is fastened. Maintenance work of part A can be performed.

As a result, it is not necessary to bend and provide a cover for waterproofing the interference between the electric wire W and the later-inserted component 5 as in Patent Document 1, or to attach it as a separate component, and the number of components and work man-hours can be reduced. .
In addition, since the partition wall 10 provided with the maintenance hole 10d is only integrally formed in the case body 2, the shape change with the conventional case body 2 is small, and the case body mold is changed. Since there are few parts, the cost of mold production can be reduced.

The electrical junction box of the present invention is not limited to the above configuration, and is a bolt that is fastened with a bolt jig through a maintenance hole. A fusible link terminal, another bus bar, a fusible link terminal, and a wire terminal terminal. May be concluded. Alternatively, the fusible link may be an integrated fusible link formed integrally with the bus bar.
Further, the post-insertion part is not limited to PD, and the number and shape of the maintenance holes provided in the partition wall are not limited, and the part facing the bolt fastening portion between the terminal of the fusible link 7 and the terminal of the electric wire terminal A required number of maintenance holes may be provided in the case. Further, the case main body may be configured to have a fuse body and a relay housing portion provided in the case main body, without being configured to fit the fuse block and the relay block.

FIG. 2 is a plan view of the electrical junction box according to the embodiment of the present invention, with the upper cover not attached to the case body. It is a perspective view of the case main body of the said electrical-connection box. It is a perspective view of the state which cut | disconnected the principal part of the said case main body. It is a schematic plan view which shows the structure of the said case main body. It is a perspective view which shows the state which has bolted the bus bar of the electrical component of the said case main body, and the terminal of an electric wire terminal. (A) is sectional drawing which shows the state which attached the cover part to the bolt fastening part, (B) is explanatory drawing of the attachment state of the cover part 21x. It is a schematic sectional drawing of the lower cover assembled | attached to a case main body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electrical junction box 2 Case main body 2a Outer peripheral wall 2b Frame part 2c Opening 3 Lower cover 3a Bottom wall 5 Post-insertion part 6 Rear-entry part accommodating part 7 Fusible link 10 Partition wall 10d Maintenance hole 11, 12 Left and right side walls 13 Holding frame Part 15 Bus bar terminal part 21 Fuse block 21b Fuse cavity side-by-side part
21d Cavity accommodating bus bar of bolt fastening portion 21x Lid portion 23, 24 Relay block 40, 41, 42 Cavity 50 Fastening jig A Bolt fastening portion C Space W1 Electric wire for terminal connection with bus bar
W2 Wire connected to fuse

Claims (3)

Bus bar, the housing portion of the last-part opened one side of the case body you mount the electric parts including a fuse and a relay provided,
A partition wall for preventing interference between the electric wire connected to the electrical component mounted on the case body and the later-inserted component accommodated in the accommodated portion of the later-inserted component is provided as the inner wall of the accommodating portion.
A maintenance hole for maintaining the electrical component mounted on the case body is provided in a portion facing the opening of the partition wall , and the electrical component mounted on the case body faces the maintenance hole. A bolt fastening portion that bolts either one or both of the bus bar and the terminal of the electric wire terminal to the terminal of the fuse or relay constituting
A vehicle-mounted electrical junction box , wherein a bolt jig can be inserted into the bolt fastening portion through the maintenance hole of the partition wall from the opening of the housing portion . The in-vehicle electrical junction box according to claim 1 , wherein a lid portion that opens and closes a bolt fastening portion of the electrical component facing the maintenance hole is attached to the electrical component . Wherein provided from left and right ends of the partition wall left and right side walls of the housing portion of the last-part, the outer peripheral wall of the case body for coupling to the outer end of the left right wall, and the opening for exposing the outer surface of the last-component And a holding frame for holding the lower end of the later-inserted part is provided continuously with the left and right side walls,
The in-vehicle electric device according to claim 1, wherein a lock portion that locks and joins the rear insert component is provided on the left and right side walls, and a lower portion of the housing portion is covered with a lower cover that is joined to the case body. Connection box.

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