JPH09250437A - Integrated connector block - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable pitch displacement at an ignition plug mounting part to be absorbed by constituting coil connection portions in an integrated connector block, connection base part arranged having a specified interval with each other, and a coil connection portion main body slide-adjustable in a plane perpendicular axially to the connection base part. SOLUTION: An integrated connector block to be used for automobile engine employing a DLI method ignition system is provided with a connector block main body 11 formed with resin in the rectangular shape, and the main body 11 is provided with plural connection base parts 12 having a specified interval in the longitudinal direction thereof. On each connection base part 12, a coil connection portion main body 13 provided with a bus bar terminal 30 is provided slidably adjustably in an plane perpendicular to each vertical direction. Further, the main body 11 is integrally provided with an external wiring connection portion to which the connector of the wire harness as the external wiring can be connected removably. The upper end part of an ignition coil part 26 is inserted into an insertion cylinder part 25 to be formed on the lower face side of the connection portion main body 13.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a DLI (Distributor Less) in an internal combustion engine of an automobile or the like.
The present invention relates to an integrated connector block for supplying power to an ignition coil for igniting an ignition type ignition plug.

[0002]

2. Description of the Related Art Conventionally, there is an integrated connector block of this type having a structure disclosed in Japanese Patent Laid-Open No. 2-283863, and the structure of this integrated connector block is shown in FIG.
As shown in FIG. 2, each of the ignition coil parts 4 provided with the connector block body 1 formed of a resin in an elongated shape and provided on the side of each ignition plug 3 attached to the engine 2,
A structure is provided in which a plurality of coil connecting portions 5 that are externally connected in the axial direction of each ignition coil portion 4, that is, the axial direction of the ignition plug 3 are integrally provided on the lower surface side of the connector block body 1. Was there.

[0003]

However, FIG.
As shown in (3), when the mounting portion 6 of the spark plug 3 in the cylinder portion of the engine 2 is machined, there is a possibility that some variation occurs in the dimension of the pitch S between the mounting portions 6 during manufacturing.

On the other hand, since each coil connecting portion 5 is formed integrally with the connector block main body 1, when the pitch S dimension between the mounting portions 6 varies greatly, the coil connecting portions 5 are displaced from each other. Could not be absorbed, and in the worst case, a situation could occur in which the coil connection parts 5 could not be mounted on the ignition coil part 4 side.

In view of the above-mentioned problems, it is an object of the present invention to provide an integrated connector block which can effectively absorb the pitch deviation of the mounting portion of the spark plug on the engine side.

[0006]

[Means for Solving the Problems] The technical means for achieving the above-mentioned object is to provide each ignition coil portion provided on the side of each ignition plug attached to an engine in the axial direction of each ignition plug. In an integrated connector block including coil connecting portions to be connected, the integrated connector block includes a connector block main body formed of resin in an elongated shape, and the coil connecting portions are arranged in the connector block main body in a longitudinal direction thereof. It is provided with a connection seat portion arranged at a predetermined interval, and a coil connection portion main body attached to the connection seat portion so as to be slidably adjustable in a plane orthogonal to the axial direction.

Further, the connector block main body is provided with an external wiring connecting portion to which an external wiring is connected, and a bus bar extending from the external wiring connecting portion to each of the connecting seat portions is provided in an embedded state, and each of the coil connecting portions is connected. The section body is provided with a connection terminal section that is connected to each of the ignition coil sections,
Contact points that are in contact with each other on the mutual sliding surfaces of the connection seats and the coil connection body so that the bus bar and the connection terminal are connected. The structure may be such that each part is provided.

Further, an insertion cylinder portion into which the end portion of the ignition coil portion is inserted is formed in the coil connecting portion main body,
A loosening hole is formed in the connection seat portion, in which the insertion cylinder portion is loosely inserted, and the inner peripheral surface side of the free insertion hole is in contact with the insertion cylinder outer peripheral surface side. A structure may be adopted in which the piece is provided so as to project inwardly in a slanted shape, and a locking portion that is locked to the slip-out preventing piece in a slip-out manner is formed on the outer peripheral surface side of the insertion cylindrical portion.

Further, a structure may be provided in which a seal mechanism is provided between the sliding surfaces of the connecting seat portion and the coil connecting portion main body which are located on the outer peripheral sides of the contact portions.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIGS. 1 to 3, reference numeral 10 denotes an integrated connector block used in an automobile engine adopting a DLI type ignition system. The connector block main body 11 is mainly composed of an insulating resin and is formed in an elongated flat plate shape.

A plurality of connecting seat portions 12 are provided on one side surface in the longitudinal direction of the connector block body 11 at predetermined intervals in the longitudinal direction so as to project laterally. In addition, the coil connecting portion main bodies 13 are provided so as to be able to slide and adjust in a plane orthogonal to the vertical direction. Then, the connecting seat portion 12 and the coil connecting portion main body 13 constitute a coil connecting portion. In the present embodiment,
It is an integrated connector block 10 for an in-line 4-cylinder engine.

Further, on one end side in the longitudinal direction of the connector block body 11, as shown by an arrow P, a connector of a wire harness as an external wiring (not shown) is detachably connectable from the lateral side. The part 14 is integrally provided.

As shown in FIGS. 4 to 6, each of the connecting seats 12 is formed in a flat shape having the same thickness as the connector block body 11, and a circular loose insertion hole 16 is formed in the center thereof. Has been done.

Further, mounting portions 18 having bolt insertion holes 17 for fixing to the engine side are formed at both ends in the longitudinal direction of the connector block body 11 of each connection seat portion 12, respectively.

The upper surface side of the connection seat portion 12 is formed in a flat shape to form a slide surface 12a.

Further, the retaining piece 19 is gradually inclined inward downward from the upper edge of the loose insertion hole 16 on the inner peripheral surface side.
Are provided so as to be spaced apart from each other in the circumferential direction. On this occasion,
The retaining piece 19 is made of the resin and is configured to be flexibly deformable by the elasticity of the resin.

On the lower surface side of the connection seat portion 12, a loose insertion hole 1 is formed.
6, a cylindrical portion 20 concentric with the cylindrical portion 6 is formed so as to project downward, and a rubber ring 21 is attached to the inner peripheral surface of the cylindrical portion 20 so as to be in elastic contact with a boss portion on the engine side.

As shown in FIGS. 4 and 7 to 9, each coil connecting portion main body 13 is formed in a shape corresponding to the connecting seat portion 12 so as to cover the upper surface side of the connecting seat portion 12, A mounting portion 23 is formed at a position corresponding to each mounting portion 18, and a bolt insertion hole 24 is formed at a position corresponding to the bolt insertion hole 17 of each mounting portion 18. At this time, each bolt insertion hole 24 is
It is made larger.

On the lower surface side of the coil connecting portion main body 13, an insertion tube portion 25 is inserted into the free insertion hole 16 in a loose insertion manner.
Is formed, and its inner diameter is set to a diameter into which the upper end of the ignition coil portion 26 can be inserted. A recess 27 having the same diameter as the inner diameter of the insertion tube portion 25 is formed on the lower surface side of the coil connection body 13 so as to communicate therewith.

Further, on the outer peripheral surface side of the lower end of the insertion tube portion 25 corresponding to each of the retaining pieces 19, locking portions 28 for retaining the respective lower ends of the retaining pieces 19 in a retaining manner are projected radially outward. It is formed into a shape.

Then, with the insertion tube portion 25 inserted in the loose insertion hole 16, the coil connecting portion main body 13 is slid on the slide surface 12.
The lower surface side of the coil connecting portion main body 13 facing the slide surface 12a is formed flat so as to be slidable on the slide surface 12a and constitutes the slide surface 13a.

Further, a bus bar terminal 30 is embedded in the coil connecting portion main body 13, and as shown in FIG. 4, a relay terminal 31 is connected to a terminal portion 26a of the ignition coil portion 26.
A connection terminal portion 30a at one end of the bus bar terminal 30 connected via the is provided in the recess 27 so as to project downward.

The other end of the bus bar terminal 30 is exposed on the slide surface 13a side of the coil connecting portion main body 13 located radially outward of the insertion tube portion 25 to form a wide contact portion 30b. . In the present embodiment, the number of bus bar terminals 30 is four, and the contact portions 30b are provided at four locations equidistantly spaced in the circumferential direction, and are slightly projected from the slide surface 13a.

Further, a circumferential annular groove 33 for mounting the O-ring 32 is formed on the side of the slide surface 13a located radially outward of each contact portion 30b.

On the other hand, the connector block body 11 is provided with embedded bus bars 35 extending from the external wiring connection portion 14 to the respective connection seat portions 12, and one end side of each bus bar 35 is connected to the external wiring connection portion. The other end side of each bus bar 35 is arranged at the 14th position in a protruding manner, and is exposed at the slide surface 12a side of the connection seat portion 12 positioned radially outside of the free insertion hole 16 to form a wide contact portion 35a. Has been done.

At this time, the respective contact portions 35a are provided at four locations equidistantly separated from each other in the circumferential direction corresponding to the respective contact portions 30b on the coil connection body 13 side, and the sliding surface 1
It is slightly projected from 2a.

Then, as shown in FIG. 4, the insertion tube portion 25 of the coil connection body 13 is inserted into the loose insertion hole 16 and the locking portion 28 is locked to the retaining piece 19, so that the coil connection is established. The part main body 13 is retained on the connection seat part 12 side in a retaining manner.

At this time, the lower end of each retaining piece 19 is in contact with the outer peripheral surface of the insertion tube 25, and each contact 30
b and 35a are in contact with each other. Further concave groove 3
The O-ring 32 housed in No. 3 has contact points 30b and 35a.
It is in close contact with the opposite slide surfaces 12a on the outer peripheral side.

Then, due to the bending deformation of each retaining piece 19,
The mutual sliding surfaces 12a and 13a are slidable, and the contact points 30b and 35a are in contact with each other within the range of this sliding.

Then, the bolt connecting holes 24 and 17 of the mounting portions 23 and 18 of the coil connecting portion main body 13 and the connecting seat portion 12, respectively.
In addition, the structure is such that the integrated connector block 10 is mounted by inserting the mounting bolt 37 and screwing it to the engine side. At this time, the bolt insertion hole 24 is formed larger than the bolt insertion hole 17 so that the slide adjustment can be performed.

Further, the connector block body 11 is also appropriately provided with a mounting portion 11a for bolting to the engine side.

The present embodiment is configured as described above, and in use thereof, the coil connecting portion main body 13 is engaged with each connecting seat portion 12 of the connector block main body 11 and the locking portion 28 is engaged with the retaining piece 19. In the stopped mounting state, each ignition plug is mounted on each ignition coil portion 26 provided on the side of each ignition plug attached to the engine from the axial direction of each ignition plug, that is, the axial direction of the ignition coil portion 26.

At this time, each pitch P on the ignition coil portion 26 side
1, P2, P3 and Q1, Q2, Q3 of the connection seat portion 12 and the coil connection portion main body 13 side forming the coil connection portion of the integrated connector block 10 side are deviated from each other in pitch. Also, the terminal portion 2 of the ignition coil portion 26
Since the coil connecting portion main body 13 to which 6a is connected can be slide-adjusted in the plane orthogonal to the axial direction, the pitch deviation can be effectively absorbed, and a good connected state can be obtained. That is, it is possible to effectively absorb the pitch deviation of the mounting portion of each spark plug on the engine side.

Then, the mounting portions 11a, 18 and 23 are fixed to the engine side by mounting bolts 37.

Further, although the cylinder and the integrated connector block 10 having different thermal expansion coefficients are respectively expanded and contracted by the heat of the engine, there is also an advantage that the sliding function can favorably cope with them.

Further, there is an advantage that the pitch deviation due to the warp of the connector block body 11 can be effectively absorbed.

Further, by the sealing mechanism by the O-ring 32, the sliding surface 12 on the outer peripheral side of each of the contact portions 30b, 35a.
a and 13a are liquid-tightly sealed, and each contact portion 30b,
There is an advantage that water can be effectively prevented from entering the 35a.

The ignition coil portion 26 may be integrally provided in the ignition plug, or may be a structure in which the ignition coil portion 26, which is formed as a separate body, is connected to the ignition plug.

Further, a taper portion having a gradually increasing diameter in the edge direction may be formed on the insertion end portion side of the insertion tube portion 25 into which the end portion of the ignition coil portion 26 is inserted. In this case, the insertion tube portion 25
There is an advantage that the ignition coil portion 26 can be easily inserted and fitted inside.

[0040]

As described above, according to the integrated connector block of the present invention, the integrated connector block is provided with the connector block main body formed of resin in an elongated shape, and each coil connecting portion has its longitudinal portion formed on the connector block main body. A connecting seat portion disposed at a predetermined distance from each other in the direction, and a coil connecting portion main body mounted on the connecting seat portion so as to be slidably adjustable in a plane orthogonal to the direction of connecting to the ignition coil portion. This structure is advantageous in that the pitch deviation of the mounting portion of each spark plug on the engine side can be effectively absorbed by adjusting the slide of the coil connection body.

Further, the coil connecting portion main body is formed with an insertion cylinder portion into which the end portion of the ignition coil portion is inserted, and the connection seat portion is formed with a loose insertion hole into which the insertion cylinder portion is loosely inserted. With
On the inner peripheral surface side of the free insertion hole, a retaining piece that is in contact with the outer peripheral surface side of the insertion tube portion is provided so as to project inwardly in a slanting manner. With the structure in which the locking portion to be stopped is formed, there is an advantage that the coil connecting portion main body can be retained in the connecting seat portion in a retaining shape.

Further, if the structure is such that the seal mechanism is provided between the sliding surfaces of the connection seat portion and the main body of the coil connection portion which are located on the outer peripheral side of the contact portions, infiltration of water into each contact portion is also effective. There is an advantage that can be prevented.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a right side view of FIG. 1;

FIG. 4 is a sectional view of a main part.

FIG. 5 is a plan view of a connection seat portion.

6 is a sectional view taken along line VI-VI of FIG.

FIG. 7 is a plan view of a coil connecting portion main body.

8 is a sectional view taken along line VIII-VIII in FIG. 7;

FIG. 9 is a bottom view of the coil connecting portion main body.

FIG. 10 is a perspective view showing a conventional example.

FIG. 11 is a plan view of the engine.

[Explanation of symbols]

 10 Integrated Connector Block 11 Connector Block Main Body 12 Connection Seat 12a Sliding Surface 13 Coil Connection Main Body 13a Sliding Surface 14 External Wiring Connection 16 Free Insertion Hole 19 Stopping Piece 25 Inserting Cylinder 26 Ignition Coil 28 Locking 30 Busbar Terminal 30a Connection terminal part 30b Contact part 32 O-ring 33 Recessed groove 35 Bus bar 35a Contact part

Claims (4)

[Claims] 1. An integrated connector block comprising: each ignition coil portion provided on each spark plug side attached to an engine; and each coil connection portion connected in the axial direction of each ignition plug. The connector block includes a connector block body formed of resin in an elongated shape, and each of the coil connection portions includes a connection seat portion arranged in the connector block body at a predetermined interval in a longitudinal direction thereof, and An integrated connector block, comprising: a coil connecting portion main body which is attached to a connecting seat portion so as to be slidably adjustable in a plane orthogonal to the axial direction. 2. The connector block main body includes an external wiring connecting portion to which an external wiring is connected, bus bars extending from the external wiring connecting portion to each of the connection seat portions are provided in an embedded manner, and each of the coil connections is connected. In order to make the bus bar and the connection terminal part in a connection state, the connection seat part and the coil connection part body are provided in the main body of the section so as to be connected to the ignition coil parts. 2. The integrated connector block according to claim 1, wherein contact points that are in contact with each other within the mutual sliding range are provided on the mutually sliding surfaces. 3. An idle insertion hole in which an end portion of the ignition coil portion is inserted into the coil connecting portion main body, and the insertion cylindrical portion is loosely inserted in the connection seat portion. Is formed, and a retaining piece that is in contact with the outer peripheral surface side of the insertion tube portion is provided on the inner peripheral surface side of the loose insertion hole so as to project inwardly in a slanted shape.
3. An engaging portion which is engaged with the retaining piece in a retaining manner is formed on the outer peripheral surface side of the insertion tube portion.
The integrated connector block described. 4. The integrated device according to claim 3, wherein a seal mechanism is provided between the sliding surfaces of the connecting seat portion and the coil connecting portion main body, which are located on the outer peripheral sides of the contact portions. Connector block.