WO2017034013A1

WO2017034013A1 - Terminal base

Info

Publication number: WO2017034013A1
Application number: PCT/JP2016/074904
Authority: WO
Inventors: 潤一椋野; 康治福本
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: 2015-08-26
Filing date: 2016-08-26
Publication date: 2017-03-02
Also published as: JP2017045590A

Abstract

A terminal base (10) is provided with: an electrically conductive member (20) which comprises an electrically conductive metal and which is formed with a linearly extending axial center (P); and a housing (40) which comprises a non-electrically conductive resin and which is fitted with a connector fitting portion (41) disposed on one end of the electrically conductive member (20), wherein the electrically conductive member (20) is recessed on both ends thereof so as to provide bolt openings (a device-side bolt opening 23 and an electric wire-side bolt opening 24), wherein a fitting direction into the connector fitting portion (41) and a fastening direction into the bolt opening on one end of the electrically conductive member (20) are aligned.

Description

Terminal block

The technology disclosed in this specification relates to a terminal block.

2. Description of the Related Art Conventionally, as a connection unit attached to a device, for example, one described in Japanese Patent Application Laid-Open No. 2014-238958 (Patent Document 1 below) is known. This connection unit is fixed in a state in which a nut housing hole for accommodating a nut is formed on one side, and at least a part of the terminal block is exposed when viewed from the other side, and is in close contact with the terminal block in the circumferential direction. The terminal connection portion and a cover that covers the nut housed in the nut housing hole and prevents the nut from being detached are configured.

Japanese Patent Application Laid-Open No. 2014-238958

However, in the terminal block described above, when connecting the terminal connection portion and the bus bar by bolt fixing, a separate nut is required, and a cover for preventing the nut from being detached is also required, which increases the number of components. In addition to this, it was necessary to assemble the nut and cover.

The terminal block disclosed in the present specification is made of a conductive metal, a conductive member having a linearly extending axis, and a non-conductive resin, and a connector fits to one end of the conductive member. And a bolt hole is recessed in each end portion of the conductive member, and the fitting direction to the connector fitting portion and the bolt hole at one end portion of the conductive member are provided. The fastening direction is the same.

According to such a configuration, since the bolt can be directly screwed into the bolt holes provided at both ends of the conductive member, the nut and the cover for preventing the nut from being removed are unnecessary. Accordingly, the number of parts is reduced, and the work of assembling the nut and cover is not required, so that the cost can be reduced.

Generally, when a terminal block is configured using a bus bar as a conductive member, it is necessary to bend the end of the bus bar at a right angle to provide a bolt fastening portion and to dispose a nut under the fastening portion. Specifically, a manufacturing method is adopted in which a nut housing part is provided by performing primary molding on a bent bus bar, and a housing is constructed by performing secondary molding with the nut housed in the nut housing part. Has been. On the other hand, according to the above configuration, since bending is not required and it is only necessary to provide a bolt hole by cutting, in addition to facilitating processing of the conductive member, the housing is formed only once on the conductive member. Therefore, the number of moldings can be reduced.

The terminal block disclosed by this specification is good also as the following structures.
The fastening direction to the bolt hole at one end of the conductive member may be the same as the axial direction of the conductive member.
According to such a structure, when cut | disconnecting and using, for example, a round bar, a square bar, etc. as a conductive member, the cut surface can be made into the fastening part of a volt | bolt.

The fastening direction to the bolt hole at the other end of the conductive member may be orthogonal to the axial direction of the conductive member.
According to such a configuration, when, for example, a rectangular bar material or the like is cut and used as the conductive member, a side surface adjacent to the cut surface can be used as a bolt fastening portion.

The bolt hole in the other end of the conductive member may be configured to penetrate the conductive member.
According to such a configuration, the dimension of the conductive member (dimension in the direction orthogonal to the axial direction) can be made constant regardless of the length of the bolt.

The base material from which the conductive member is based may be a bar material.
According to such a configuration, since the cross-sectional area of the conductive member is larger than the area of the bolt hole, the internal resistance of the conductive member can be reduced as compared with the case where a bus bar is used as the conductive member. Heat generation can be suppressed. In addition, as the cross-sectional area of the conductive member increases, the contact area with the housing also increases, so that heat dissipation from the conductive member to the housing can be expected to increase.

According to the terminal block disclosed in this specification, the number of parts is reduced, and the assembly work of the nut and the cover becomes unnecessary, so that the cost can be reduced.

Perspective view of terminal block Cross section of terminal block Sectional view showing terminal block connection

<Embodiment>
Embodiments will be described with reference to FIGS. 1 to 3. As shown in FIG. 3, the terminal block 10 of the present embodiment relays and connects the device-side terminal 1 provided in the device and the wire-side terminal 2 connected to the terminal of the wire W. Used in a fixed state. The device side terminal 1 is integrally formed with a synthetic resin wire side fitting portion 3. The electric wire side fitting portion 3 has an opening 4 for bolt fastening work, and the opening 4 is closed by a service cover 5.

As shown in FIG. 1, the terminal block 10 includes a plurality of conductive members 20, a pair of mounting portions 30, and a housing 40 that integrally holds the conductive members 20 and the mounting portions 30. ing.

The mounting portion 30 is formed in a flat plate shape and protrudes from the housing 40, and has an insertion hole 31 through which a bolt (not shown) is inserted. The terminal block 10 is fixed to the case of the device by inserting a bolt (not shown) through the insertion hole 31 and fastening it to a fixing hole provided in the case of the device.

The housing 40 is made of non-conductive resin, and has a tubular connector fitting portion 41 and a back wall 42 disposed on the back side of the connector fitting portion 41. The plurality of conductive members 20 are configured to penetrate the inner wall 42 on the inner peripheral side of the connector fitting portion 41, and the plurality of attachment portions 30 are extended outward from the outer peripheral surface of the connector fitting portion 41 in the radial direction. It is said that.

The conductive member 20 is made of a conductive metal, and is formed by cutting a predetermined length using a square bar material as a base material and then performing a cutting process such as drilling with a drill. As shown in FIG. 2, the conductive member 20 has a form in which the axis P extends linearly, and has a pair of fastening portions disposed at both ends in the axial direction. The fastening portion located on the lower side in FIG. 2 is a device-side fastening portion 21 to which the device-side terminal 1 is fastened by the device-side bolt B1. On the other hand, the fastening portion located on the upper side in FIG. 2 is a wire-side fastening portion 22 where the wire-side terminal 2 is fastened by the wire-side bolt B2. The axial direction of the conductive member 20 refers to the direction in which the axis P extends.

The equipment side fastening portion 21 has a form opening on both sides in a direction orthogonal to the axial direction of the conductive member 20 (hereinafter referred to as “radial direction”), and has equipment side bolt holes 23 penetrating in the radial direction. An internal thread is formed on the inner peripheral surface of the device side bolt hole 23. Therefore, when the device side bolt B1 is inserted into the device side insertion hole 6 of the device side terminal 1 and screwed into the device side bolt hole 23, the device side terminal 1 is fastened to the head of the device side bolt B1 and the device side. The device side terminal 1 and the device side fastening portion 21 are connected to each other so as to be conductive.

The electric wire side fastening portion 22 is configured to open to one side of the conductive member 20 in the axial direction, and has an electric wire side bolt hole 24 configured as a bottomed recess. An internal thread is formed on the inner peripheral surface of the electric wire side bolt hole 24. Therefore, when the electric wire side bolt B2 is inserted into the electric wire side insertion hole 7 of the electric wire side terminal 2 and screwed into the electric wire side bolt hole 24, the electric wire side terminal 2 is fastened to the head of the electric wire side bolt B2 and the electric wire side fastening. The electric wire side terminal 2 and the electric wire side fastening part 22 are connected so as to be conductive.

The connector fitting portion 41 is located at the upper end portion of the conductive member 20. The fitting direction in which the electric wire side fitting portion 3 is fitted into the connector fitting portion 41 and the fastening direction in which the electric wire side bolt B2 is fastened to the electric wire side bolt hole 24 are both in the vertical direction and coincide with each other. Yes. That is, after fitting the wire side fitting portion 3 into the connector fitting portion 41 from above, the fastening operation to the wire side fastening portion 22 of the wire side bolt B2 is performed through the opening 4, and the fastening operation is completed. Thereafter, the opening 4 is closed by fitting the service cover 5 inside the opening 4.

Since the seal ring 8 is interposed between the connector fitting portion 41 and the electric wire side fitting portion 3 and between the opening portion 4 and the service cover 5, The inside is kept in a water-stopped state.

In the present embodiment, the terminal block 10 is configured by integrally molding the housing 40 with the conductive member 20. The housing 40 is in contact with the conductive member 20 at the back wall 42. The connector fitting portion 41 is located at the upper end portion of the conductive member 20 and is arranged so that the fastening surface of the electric wire side fastening portion 22 and the opening edge of the connector fitting portion 41 are substantially aligned. The back wall 42 is formed thicker than the connector fitting portion 41 so that heat can be easily radiated from the conductive member 20 to the housing 40.

Further, in the present embodiment, it is not necessary to provide the nut housing portion by primary molding, and it is not necessary to mold in two steps, so that the housing 40 can be molded once. Along with this, the amount of resin required to configure the housing 40 is minimized, and the amount of resin used can be reduced compared to a terminal block that requires a nut housing portion.

Further, a solid intermediate portion 25 is provided between the device-side fastening portion 21 and the wire-side fastening portion 22 in the conductive member 20. The cross-sectional area of the intermediate portion 25 is constant in the axial direction of the conductive member 20. For this reason, the internal resistance of the intermediate portion 25 can be lowered as compared with the case where a bus bar is used as the conductive member, and the heat generation of the conductive member 20 itself can be minimized even in the terminal block 10 for large current use. It has become. The heat generated in the conductive member 20 is efficiently radiated to the entire housing 40 through the back wall 42.

As described above, in this embodiment, bolts (equipment side bolt B1 and electric wire side bolt B2) are directly screwed into bolt holes (equipment side bolt hole 23, electric wire side bolt hole 24) provided at both ends of the conductive member 20. Therefore, the nut and the cover for preventing the nut from being removed are unnecessary. Accordingly, the number of parts is reduced, and the work of assembling the nut and cover is not required, so that the cost can be reduced.

Generally, when a terminal block is configured using a bus bar as a conductive member, it is necessary to bend the end of the bus bar at a right angle to provide a bolt fastening portion and to dispose a nut under the fastening portion. Specifically, a manufacturing method is adopted in which a nut housing part is provided by performing primary molding on a bent bus bar, and a housing is constructed by performing secondary molding with the nut housed in the nut housing part. Has been. On the other hand, according to the above configuration, since bending is not required and it is only necessary to provide a bolt hole by cutting, in addition to facilitating the processing of the conductive member 20, the housing 40 is attached to the conductive member 20 once. Since only molding is required, the number of moldings can be reduced. Further, the amount of resin used can be reduced as the number of moldings decreases.

The fastening direction to the electric wire side bolt hole 24 at one end of the conductive member 20 may be configured to coincide with the axial direction of the conductive member 20.
According to such a configuration, when, for example, a round bar, a square bar, or the like is cut and used as the conductive member 20, the cut surface can be a fastening portion of the electric wire side bolt B2.

The fastening direction to the device-side bolt hole 23 at the other end of the conductive member 20 may be configured to be orthogonal to the axial direction of the conductive member 20.
According to such a configuration, when, for example, a square bar material or the like is cut and used as the conductive member 20, the side surface adjacent to the cut surface can be used as the fastening portion of the device side bolt B1.

The equipment side bolt hole 23 at the other end of the conductive member 20 may be configured to penetrate the conductive member 20.
According to such a structure, the dimension (dimension of the direction orthogonal to an axial direction) of the electrically-conductive member 20 can be made constant irrespective of the length of the apparatus side volt | bolt B1.

The base material from which the conductive member 20 is based may be configured to be a bar (in this embodiment, a square bar).
According to such a configuration, since the cross-sectional area of the conductive member 20 is larger than the area of the bolt hole (device-side bolt hole 23, electric wire-side bolt hole 24), the conductive member 20 is more conductive than, for example, a bus bar. The internal resistance of the member 20 can be lowered, and the heat generation of the conductive member 20 itself can be suppressed. Further, since the contact area with the housing 40 increases as the cross-sectional area of the conductive member 20 increases, it can be expected that the heat dissipation from the conductive member 20 to the housing 40 is enhanced.

<Other embodiments>
The technology disclosed in the present specification is not limited to the embodiments described with reference to the above description and drawings, and includes, for example, the following various aspects.
(1) Although the conductive member 20 in which the pair of bolt holes 23 and 24 are recessed in the square bar material is illustrated in the above-described embodiment, the conductive member may have a pair of bolt holes recessed in the round bar material.

(2) Although the conductive member 20 is formed using a rod having a constant cross-sectional area in the axial direction in the above embodiment, the intermediate portion has a smaller diameter than the both ends by, for example, aluminum die casting (dumbbell The conductive member may be formed using the formed base material. In this case, you may make it the cross-sectional area of the both ends in which the bolt hole was recessed and the cross-sectional area of an intermediate part become constant.

(3) In the above embodiment, the device-side bolt hole 23 is illustrated as opening in the radial direction of the conductive member 20, but the device-side bolt hole may be open in the axial direction of the conductive member. .

(4) Although the device side bolt hole 23 penetrates the conductive member 20 in the above embodiment, the device side bolt hole may be configured as a bottomed recess.

DESCRIPTION OF SYMBOLS 10 ... Terminal block 20 ... Conductive member 23 ... Equipment side bolt hole 24 ... Electric wire side bolt hole 40 ... Housing 41 ... Connector fitting part P ... Shaft center

Claims

A conductive member made of a conductive metal and having a shape in which the axis extends linearly;
A non-conductive resin, and a housing provided with a connector fitting portion at one end of the conductive member;
Bolt holes are respectively recessed at both ends of the conductive member, and the terminal block in which the fitting direction to the connector fitting portion and the fastening direction to the bolt hole at one end portion of the conductive member coincide with each other. .
The terminal block according to claim 1, wherein a fastening direction to the bolt hole at one end portion of the conductive member coincides with an axial direction of the conductive member.
The terminal block according to claim 1 or 2, wherein a fastening direction to the bolt hole at the other end of the conductive member is orthogonal to an axial direction of the conductive member.
The terminal block according to claim 3, wherein the bolt hole in the other end of the conductive member is configured to penetrate the conductive member.
The terminal block according to any one of claims 1 to 4, wherein the base material from which the conductive member is based is a bar.