WO2013051529A1

WO2013051529A1 - Terminal fitting

Info

Publication number: WO2013051529A1
Application number: PCT/JP2012/075455
Authority: WO
Inventors: 伊藤　大輔; 和裕麻生; 詩朗西田
Original assignee: 株式会社オートネットワーク技術研究所; 住友電装株式会社; 住友電気工業株式会社
Priority date: 2011-10-07
Filing date: 2012-10-02
Publication date: 2013-04-11
Also published as: JP5691986B2; JP2013084418A

Abstract

The present invention is provided with a terminal connection part in which a bolt insertion hole is disposed in an opened manner on the edge of the terminal connection part, a wire connection part on which a bolt securing part having a fastening seat surface for fastening a bolt is disposed, a bolt for securing the bolt securing part to the edge of the terminal connection part, and a nut which is stored within the terminal connection part, is screwed together with the bolt, and is formed from a metal material that is harder than the metal material forming the terminal connection part, wherein a receiving surface for receiving the nut at the surface in the bolt fastening direction is disposed on the terminal connection part, the bolt securing part is disposed on the edge part of the terminal connection part and the bolt is inserted into the bolt insertion hole to screw the bolt together with the nut, the head of the bolt is crimped to the fastening seat surface of the bolt securing part, and the nut is crimped to the receiving surface of the terminal connection part.

Description

Terminal fitting

The present invention relates to a terminal fitting.

Conventionally, a terminal connection portion provided with a bolt fastening hole opened at an end portion, an electric wire connection portion provided with a bolt fixing portion having a fastening seat surface for bolt fastening, and the bolt fixing portion at the end of the terminal connection portion. The thing of the following patent document 1 is known as a terminal metal fitting provided with the volt | bolt fixed to a part. In this case, the bolt fixing portion is arranged at the end of the terminal connecting portion, and the bolt is screwed into the bolt fastening hole, whereby the head of the bolt is pressed against the fastening seating surface of the bolt fixing portion, and the terminal connecting portion and The electric wire connecting portion is connected so as to be conductive.

Japanese Utility Model Publication No. 6-58560

In general, terminal fittings are made of copper with excellent electrical characteristics, but copper is softer than iron, stainless steel, etc., so when bolt fastening holes are formed in copper terminal connections There is a risk of crushing the screw threads in the bolt fastening holes when fastening the bolts. Therefore, the connection between the terminal connection portion and the wire connection portion becomes unstable, and connection reliability is impaired. Further, the terminal fitting has a bolt fastening portion exposed to the outside, and does not have waterproof performance.

The present invention has been completed based on the above situation, and aims to improve connection reliability and ensure waterproof performance.

The present invention includes a terminal connecting portion provided with a bolt insertion hole opened at an end portion, an electric wire connecting portion provided with a bolt fixing portion having a fastening seat surface for fastening bolts, and the bolt fixing portion as a terminal connecting portion. A bolt that is fixed to the end of the terminal, and a metal that is harder than the metal that constitutes the terminal connection, and that is housed inside the terminal connection and includes a nut that is screwed into the bolt. Is provided with a receiving surface for receiving the nut in the fastening direction of the bolt, by placing the bolt fixing portion at the end of the terminal connecting portion, inserting the bolt into the bolt insertion hole, and screwing it into the nut. The bolt head is pressed against the fastening seating surface of the bolt fixing portion, and the nut is pressed against the receiving surface of the terminal connecting portion.

According to such a configuration, the nut into which the bolt is screwed is formed separately from the terminal connection portion, and the metal material constituting the nut is harder than the metal material constituting the terminal connection portion. There is no risk of crushing the threads. Moreover, since the nut is received on the surface by the receiving surface of the terminal connecting portion, the nut can be firmly received, and the bolt can be reliably restricted from being loosened by, for example, scraping a metal material that receives the nut. As a result, since the head of the bolt is pressed against the fastening seat surface of the bolt fixing portion and the nut is pressed against the receiving surface of the terminal connecting portion, the connection reliability can be improved.

The following configuration is preferable as an embodiment of the present invention.
A nut receiving hole for receiving the nut is provided at the side of the terminal connecting portion, and an opening for connecting the bolt insertion hole to the nut receiving hole is provided inside the terminal connecting portion. It is good also as a structure by which the receiving surface is provided in the opening edge part.
According to such a structure, a nut can be accommodated in the inside of a terminal connection part by inserting a nut in a nut accommodation hole from the side part of a terminal connection part.

A nut is good also as a structure accommodated so that free movement is possible in the direction which cross | intersects the fastening direction of a volt | bolt.
According to such a configuration, when the tip of the bolt is screwed into the nut, the nut can be moved in accordance with the position of the tip of the bolt, and the assembly tolerance between the bolt and the nut can be easily absorbed.

It is good also as a structure provided with the control member which is accommodated in the inside of a terminal connection part with a nut, and controls the movement to the removal direction of a nut.
According to such a structure, it can control that a nut moves to a removal direction by a control member. For example, when a standard nut is used, since the nut is not made to match the shape of the terminal connection portion, the nut and the outer surface of the terminal connection portion are in a state where the nut is accommodated inside the terminal connection portion. A gap may be formed between the two. In such a case, it is possible to restrict the nut from moving in the pulling direction by accommodating the regulating member in the gap.

The terminal on the wire side connected to the wire is housed inside, the terminal housing member is provided with a work hole that allows the bolt fixing part to face the outside, and the seal mounting part that fits into the work hole is provided to close the work hole. It is good also as a structure provided with the cover body and the sealing member with which a seal | sticker mounting part is mounted | worn and block | closes a work hole in a sealing state.
In such a configuration, when the work hole is closed with the lid, the work hole is closed in a sealed state by the seal member, so that the bolt fastening portion does not get wet with water, and waterproof performance can be ensured.

According to the present invention, connection reliability can be improved and waterproof performance can be ensured.

An exploded perspective view showing the peripheral structure of the terminal fitting The perspective view which looked at the vehicle side connector from diagonally forward The perspective view which looked at the vehicle side connector from diagonally behind The perspective view which shows the vehicle side connector of the state which removed the back retainer in FIG. The perspective view which shows the vehicle side connector of the state which removed the back retainer in FIG. Front view of the vehicle side connector as seen from the front Right side view of the vehicle side connector viewed from the right side AA line sectional view in FIG. BB sectional view in FIG.

<Embodiment>
An embodiment of the present invention will be described with reference to the drawings of FIGS. The vehicle-side connector 10 of the present embodiment can be fitted to a large current circuit connector (not shown), and is connected to a battery (not shown) mounted on the vehicle. As shown in FIG. 2, the vehicle-side connector 10 has a cylindrical connector fitting portion 11, and a plurality of terminal accommodating cylinders 12 are provided inside the connector fitting portion 11. Yes. On the other hand, a connector mounting portion 13 that is bolted to the vehicle body is provided on the outer peripheral side surface of the connector fitting portion 11 so as to protrude to the outer peripheral side. A plurality of collars 14 are fixed to the connector mounting portion 13 by press-fitting or insert molding. Bolts (not shown) are inserted into the collars 14 and tightened into screw holes formed on the body side. The connector attachment portion 13 is fixed to the body.

As shown in FIG. 8, the connector fitting portion 11 is arranged in a form penetrating the connector mounting portion 13 in the front-rear direction. Further, the terminal accommodating cylinder 12 is arranged in a form penetrating the back wall of the connector fitting portion 11 in the front-rear direction. The front end of the terminal accommodating cylinder 12 is located behind the front end of the connector fitting portion 11.

A back retainer 20 is attached to a portion 11 R of the connector fitting portion 11 that protrudes rearward from the connector mounting portion 13 (hereinafter referred to as “the rear portion of the connector fitting portion”). The back retainer 20 is a retaining member that prevents the terminal fitting 30 accommodated in the terminal accommodating cylinder 12 from coming off. Further, the back retainer 20 has a form that opens forward, and is mounted so as to cover the rear portion 11R of the connector fitting portion 11 from the rear. A plurality of locking projections 15 are provided on the rear portion 11 R of the connector fitting portion 11. On the other hand, a plurality of locking holes 21 are provided on the front end side of the back retainer 20 to lock the back retainer 20 to the rear portion 11 R of the connector fitting portion 11 by being locked to each locking protrusion 15.

As shown in FIG. 1, the terminal fitting 30 includes a terminal connecting portion 40 that can be fitted to a mating terminal (round pin-shaped terminal), a wire connecting portion 50 connected to the terminal connecting portion 40, and the wire connecting portion. A bolt 60 or the like for bolting 50 to the terminal connecting portion 40 is provided.

The terminal connection part 40 is a terminal called a name such as a slot terminal, and includes a plurality of contact pieces 41. These contact pieces 41 are arranged in a ring shape so as to protrude forward from a cylindrical terminal body 42. A first fitting groove 44 into which the first rubber ring 43 is fitted is provided on the outer peripheral side surface of the terminal body 42. In addition, a connecting tube portion 45 having a smaller diameter than the terminal main body 42 and arranged coaxially is connected to the rear end of the terminal main body 42. A bolt insertion hole 46 through which the bolt 60 is inserted is formed in the range from the terminal main body 42 to the connecting cylinder portion 45 so as to open rearward. Further, a nut accommodation hole 47 in which the nut 70 is accommodated is formed on the outer peripheral side surface of the terminal main body 42 so as to open laterally. The first fitting groove 44 is arranged on the front end side of the terminal body 42, and the nut accommodation hole 47 is arranged behind the first fitting groove 44.

The wire connection part 50 is configured such that the round terminal 52 shown in FIG. 8 is accommodated inside the terminal accommodating member 51 shown in FIG. The round terminal 52 includes a bolt fixing portion 53 having a fastening seat surface for fastening bolts, and the fastening seat surface is formed around a hole through which the bolt 60 is passed. The round terminal 52 has a flat plate shape as a whole, and is arranged in such a manner that its fastening seating surface is orthogonal to the axial direction of the bolt insertion hole 46 of the terminal connection portion 40. On the side of the bolt fixing portion 53, a core wire connecting portion 54 connected to the core wire of the electric wire W is integrally formed side by side on the same plane so as to be flush with the bolt fixing portion 53.

The terminal accommodating member 51 has a seal cylinder part 55 that accommodates the connection cylinder part 45 of the terminal connection part 40 therein. As shown in FIG. 1, the seal cylinder portion 55 has a cylindrical shape that protrudes forward from one end of the terminal accommodating member 51. On the other hand, a wire insertion hole 59 through which the wire W is passed is formed at the other end of the seal cylinder portion 55 so as to open to the side. A second fitting groove 57 into which the second rubber ring 56 is fitted is provided on the outer peripheral surface of the seal cylinder portion 55. As shown in FIG. 8, the seal cylinder portion 55 can be fitted inside the rear end opening of the terminal accommodating cylinder 12.

As a result, the second rubber ring 56 is sandwiched between the peripheral surface of the second fitting groove 57 and the inner peripheral surface of the terminal housing cylinder 12 so that the space between the terminal housing member 51 and the terminal housing cylinder 12 is reduced. Sealed. At the same time, the first rubber ring 43 is sandwiched between the peripheral surface of the first fitting groove 44 and the inner peripheral surface of the terminal housing cylinder 12, so that the terminal main body 42 and the terminal housing cylinder 12 of the terminal connection portion 40 are held. Is sealed. Further, water immersion from the inside of the terminal accommodating cylinder 12 into the nut accommodating hole 47 is restricted by the rubber rings 43 and 56.

A work hole 58 for performing a bolting operation is opened behind the seal cylinder portion 55 in the terminal accommodating member 51. A lid 80 can be fitted into the work hole 58. The lid 80 is provided with a seal mounting portion 81 that can be fitted into the work hole 58. The seal mounting portion 81 has a substantially cylindrical shape, and a third fitting groove 83 into which the third rubber ring 82 can be fitted is provided around the outer peripheral surface thereof. A pair of

attachment pieces

84 and 84 for fixing the lid 80 to the terminal accommodating member 51 are provided on the outer peripheral edge of the lid 80. On the other hand, on the outer surface of the terminal accommodating member 51, a pair of

attachment protrusions

51A and 51A that can be engaged with the

attachment pieces

84 and 84 are formed. Accordingly, when the seal mounting portion 81 of the lid 80 is fitted into the work hole 58, the

attachment pieces

84 and 84 are locked to the

attachment protrusions

51A and 51A, and the lid 80 is fixed to the terminal accommodating member 51. . In addition, the third rubber ring 82 is sandwiched between the peripheral surface of the third fitting groove 83 and the inner peripheral surface of the work hole 58, thereby sealing between the lid 80 and the terminal accommodating member 51.

A cap 90 is mounted around the wire insertion hole 59 of the terminal accommodating member 51. The cap 90 has a pair of mounting

pieces

91, 91, and these mounting

pieces

91, 91 are engaged with a pair of mounting protrusions 51 B, 51 B provided on the outer surface of the terminal storing member 51, so 51 is fixed. A water-stopping process (not shown) is performed between the covering of the electric wire W and the inner peripheral surface of the cap 90, so that water is prevented from entering the terminal accommodating member 51 from the electric wire insertion hole 59.

In the present embodiment, the shaft portion of the bolt 60 is inserted into the bolt insertion hole 46 through the hole of the bolt fixing portion 53 and screwed into the nut 70. When the bolt 60 is tightened, the nut 70 is pulled toward the head side of the bolt 60 and is brought into pressure contact with the receiving surface 48 provided on the terminal connection portion 40. The receiving surface 48 is formed at the opening edge of the opening of the bolt insertion hole 46 connected to the nut accommodation hole 47. In a state where the nut 70 is pressed against the receiving surface 48, the head of the bolt 60 is pressed against the rear end portion of the connecting tube portion 45. Accordingly, the bolt 60 can be firmly tightened, and the screw thread of the nut 70 is not crushed along with this tightening, so that the terminal connecting portion 40 and the wire connecting portion 50 can be firmly bolted.

In the state where the bolt 60 is accommodated in the nut accommodation hole 47, a gap is formed between the opening of the nut accommodation hole 47 and the bolt 60. A regulating member 71 is accommodated in this gap. The restricting member 71 is made of synthetic resin, and restricts movement of the nut 70 in the pulling direction before the bolt 60 is fastened to the nut 70. As shown in FIG. 1, the restriction member 71 has a substantially H-shaped cross section and extends in the direction in which the nut 70 is accommodated in the nut accommodation hole 47. In addition, the surface of the regulating member 71 that faces the outer peripheral side surface of the terminal main body 42 of the terminal connecting portion 40 is formed in an arc shape along the outer peripheral side surface of the terminal main body 42.

Furthermore, the nut 70 is allowed to move in the direction intersecting with the fastening direction of the bolt 60 in the state where it is accommodated in the nut accommodation hole 47. For this reason, even when the tip end of the shaft portion of the bolt 60 enters the nut receiving hole 47 in a state where it is off the shaft center of the nut 70, the nut 70 can be guided according to the position of the tip portion of the shaft portion of the bolt 60. Therefore, the bolt 60 and the nut 70 can be reliably screwed together.

This embodiment is configured as described above, and the procedure for assembling the vehicle-side connector 10 will be described. First, the rubber rings 43, 56, and 82 are attached to the

fitting grooves

44, 57, and 83, the nut 70 is inserted into the nut accommodation hole 47 of the terminal connection portion 40, and the regulating member 71 is subsequently attached to the nut 70. Insert into the nut receiving hole 47. Then, the connection tube portion 45 of the terminal connection portion 40 is fitted into the seal tube portion 55 of the terminal housing member 51. Next, the round terminal 52 connected to the terminal of the electric wire W enters the inside from the electric wire insertion hole 59 of the terminal accommodating member 51, and the bolt fixing portion 53 of the round terminal 52 is arranged at the rear end portion of the connecting tube portion 45. . In addition, a cap 90 previously passed through the electric wire W is attached to the outer periphery of the electric wire insertion hole 59.

Next, the shaft portion of the bolt 60 is passed from the rear of the terminal accommodating member 51 through the work hole 58 and the hole of the bolt fixing portion 53 and is inserted into the bolt insertion hole 46. Then, the tip of the shaft portion of the bolt 60 is in sliding contact with the hole edge of the hole of the nut 70, so that the nut 70 is drawn to the tip end side of the shaft portion of the bolt 60 and begins to be screwed into the nut 70. When the fastening operation of the bolt 60 is completed, the head of the bolt 60 is pressed against the rear end portion of the connecting tube portion 45 and the nut 70 is received by the receiving surface 48 and pressed. Thereafter, the work hole 58 is closed by the lid 80. Thus, the terminal fitting 30 is completed.

Next, the terminal connection part 40 of each terminal metal fitting 30 is inserted into each terminal accommodating cylinder 12 from the rear. After each terminal fitting 30 is accommodated in each terminal accommodating cylinder 12, the back retainer 20 is attached to the rear portion 11 R of the connector fitting portion 11 from the rear. Then, each terminal metal fitting 30 is held in a state in which it is prevented from coming out backward by the back retainer 20. Thereafter, the vehicle-side connector 10 is attached and fixed to the body by bolting the collar 14 of the connector attachment portion 13 with the bolt to the vehicle body.

As shown in FIG. 7, the side surface of the back retainer 20 is provided with a lead hole 22 through which one terminal accommodating member 51 is inserted and pulled out to the side. Has been pulled out. The other terminal accommodating member 51 is pulled out from the lower side of the back retainer 20 to the side. Further, the electric wires W, W drawn sideways from the respective

terminal housing members

51, 51 are arranged in the vertical direction so as not to protrude rearward from the back retainer 20, and the vehicle side The front-rear dimension of the connector 10 is shortened.

As described above, in this embodiment, the nut 70 screwed to the bolt 60 is configured separately from the terminal connection portion 40 and the nut 70 is formed of a metal material harder than the terminal connection portion 40. It is possible to avoid the screw thread of the nut 70 from being crushed by the insertion. Further, since the nut 70 is received on the surface by the receiving surface 48, the tightening force of the bolt 60 can be dispersed throughout the receiving surface 48. Therefore, deformation of the nut accommodation hole 47 is restricted and the nut 70 can be reliably held in the nut accommodation hole 47.

A nut accommodation hole 47 for accommodating the nut 70 is provided to be opened at a side portion of the terminal connection portion 40, and the bolt insertion hole 46 is connected to the nut accommodation hole 47 at the opening edge portion of the opening in the terminal connection portion 40. Since the receiving surface 48 is provided, the nut 70 can be accommodated inside the terminal connection portion 40 by inserting the nut 70 into the nut accommodation hole 47 from the side of the terminal connection portion 40.

Since the nut 70 is accommodated so as to be freely movable in a direction intersecting with the fastening direction of the bolt 60, when the tip of the bolt 60 is screwed into the nut 70, the nut 70 is aligned with the position of the tip of the bolt 60. 70 can be moved, and the assembly tolerance of the bolt 60 and the nut 70 can be easily absorbed.

Since the restriction member 71 is provided in the terminal connection portion 40 together with the nut 70 and restricts the movement of the nut 70 in the removal direction, the restriction member 71 restricts the nut 70 from moving in the removal direction. it can. In particular, in the present embodiment, a standard nut 70 is used, and the nut 70 is not made in accordance with the shape of the terminal connection portion 40, so that the nut 70 is accommodated in the terminal connection portion 40. Although a gap is formed between 70 and the outer surface of the terminal connection portion 40, the movement of the nut 70 in the removal direction can be restricted by accommodating the regulating member 71 in the gap.

It has a terminal accommodating member 51 provided with a work hole 58 for accommodating the round terminal 52 inside and facing the bolt fixing portion 53 to the outside, and a seal mounting portion 81 fitted into the work hole 58. Since the lid 80 and the third rubber ring 82 that is attached to the seal attachment portion 81 and seals the work hole 58 in a sealed state are provided, the work hole 58 is closed with the lid 80 when the work hole 58 is closed. The work hole 58 is closed in a sealed state by the three rubber rings 82, and the head of the bolt 60 does not get wet with water, so that waterproof performance can be ensured.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) Although the nut accommodation hole 47 is opened in the side part of the terminal main body 42 in the said embodiment, according to this invention, a nut accommodation hole is a front part (the base end part of each contact piece is connected) of a terminal main body. It may be open at the end).

(2) Although the nut 70 and the regulating member 71 are formed separately in the above embodiment, according to the present invention, the nut and the regulating member may be formed integrally. Further, by providing ribs on the restricting member, the nut accommodation hole 47 may be padded and the nut may be positioned at the proper mounting position.

(3) Although the round terminal 52 is housed inside the terminal housing member 51 in the above embodiment, according to the present invention, the round terminal and the terminal housing member can be integrally formed by molding the round terminal. Good.

DESCRIPTION OF SYMBOLS 10 ... Vehicle side connector 30 ... Terminal metal fitting 40 ... Terminal connection part 46 ... Bolt insertion hole 47 ... Nut accommodation hole 48 ... Receiving surface 50 ... Electric wire connection part 51 ... Terminal accommodation member 52 ... Round terminal (electric wire side terminal)
53 ... Bolt fixing portion 58 ... Work hole 60 ... Bolt 70 ... Nut 71 ... Regulating member 80 ... Cover body 81 ... Seal mounting portion W ... Electric wire

Claims

A terminal connecting portion provided with a bolt insertion hole opened at the end; and
A wire connecting portion provided with a bolt fixing portion having a fastening seat surface for fastening bolts;
A bolt for fixing the bolt fixing portion to an end portion of the terminal connecting portion;
It is composed of a metal material harder than the metal material constituting the terminal connection part, and is housed inside the terminal connection part, and includes a nut that is screwed with the bolt,
The terminal connection portion is provided with a receiving surface for receiving the nut by a surface in the fastening direction of the bolt, and the bolt fixing portion is disposed at an end portion of the terminal connection portion so that the bolt is inserted into the bolt insertion hole. The bolt head is pressed into contact with the fastening seat surface of the bolt fixing portion, and the nut is pressed into contact with the receiving surface of the terminal connection portion. Hardware.
A nut receiving hole for receiving the nut is provided to be opened in a side portion of the terminal connecting portion, and an opening for connecting the bolt insertion hole to the nut receiving hole is provided in the terminal connecting portion. The terminal fitting according to claim 1, wherein the receiving surface is provided at an opening edge of the opening.
3. The terminal fitting according to claim 1 or 2, wherein the nut is accommodated so as to be freely movable in a direction crossing a fastening direction of the bolt.
The terminal fitting according to any one of claims 1 to 3, further comprising a restricting member that is accommodated in the terminal connecting portion together with the nut and restricts movement of the nut in a pulling direction.
A terminal accommodating member provided with a work hole for accommodating the electric wire side terminal connected to the electric wire inside and facing the bolt fixing portion to the outside;
A seal mounting portion that fits into the working hole, and a lid that closes the working hole;
The terminal fitting according to any one of claims 1 to 4, further comprising a seal member that is mounted on the seal mounting portion and closes the work hole in a sealed state.