CN213673673U

CN213673673U - Threaded contact

Info

Publication number: CN213673673U
Application number: CN202021147647.4U
Authority: CN
Inventors: 西蒙·福尔曼
Original assignee: Phoenix Contact GmbH and Co KG
Current assignee: Phoenix Contact GmbH and Co KG
Priority date: 2019-06-19
Filing date: 2020-06-19
Publication date: 2021-07-13
Anticipated expiration: 2030-06-19
Also published as: DE102019116581A1

Abstract

The utility model relates to a screw contact piece (100) for connecting electric conductor, including metal casing (110), be used for inserting the centre gripping opening (111) of the electric conductor of treating the connection, receive the piece (120), wherein receive the piece (120) and be movably held on casing (110) in order to make centre gripping opening (111) narrow and open, and screw contact piece includes bolt (130) that are used for removing receive the piece (120). The metal housing (110) has a bolt stop (112) with lugs (113, 114) which bear against the thread (131) of the bolt (130).

Description

Threaded contact

Technical Field

The invention relates to a threaded contact piece for connecting electrical conductors, having a metal housing, a clamping opening for inserting an electrical conductor to be connected, a pressure piece, wherein the pressure piece is accommodated in the housing and movably held on the housing in order to narrow and open the clamping opening, and the threaded contact piece has a bolt for moving the pressure piece.

Background

Threaded contacts of this type are used for clamping electrical conductors. It may happen that the position of the bolt is changed due to vibration during transportation. Thus, the threaded contacts are, upon arrival at the customer or assembly site, some in the open position and some in the closed state. This increases the assembly effort and requires that the screw contact be delivered in a defined open position.

It is also required that the threaded contact piece can be opened and closed several times without damage under substantially the same applied force, and that the clamping device therefore achieves a clamping condition that can be reproduced repeatedly and precisely. For this reason, the frictional conditions within the clamping device should also remain substantially constant after a number of repeated openings and closings.

SUMMERY OF THE UTILITY MODEL

It is therefore an object of the present invention to provide a threaded contact element which at least partially meets the above-mentioned requirements and in particular enables reliable transport securing and reproducible clamping conditions of the bolt.

According to the invention, this object is achieved by the features of the independent claims. Advantageous embodiments and advantageous refinements of the invention are set forth in the dependent claims and in the following description.

The invention relates to a threaded contact piece for connecting electrical conductors, having a metal housing, a clamping opening for inserting an electrical conductor to be connected, a pressure piece, wherein the pressure piece is accommodated in the housing and movably held on the housing in order to narrow and open the clamping opening, and the threaded contact piece has a bolt for moving the pressure piece. The screw contact is characterized in that the metal housing has a screw stop with a web which rests on the screw thread of the screw.

The webs realize a defined bolt position in the open position and preset a defined torque which is at least required for moving the bolt from the open position into the clamping position and from the clamping position into the open position. The tab thus achieves constant friction and torque when opening and closing the bolt by means of a predetermined clamping force, so that a clamping condition exists which can be reproduced reproducibly accurately. The bolt brake has at least one tab. However, it may also have more than one tab.

In particular, it is provided that the web can be elastically tensioned by a spring against the thread of the screw.

The tabs may be formed on the metal shell by stamping. The webs can thus be formed in particular integrally with the metal housing and are an integral component of the metal housing. The webs can therefore be produced in a simple and cost-effective manner.

According to an advantageous further development of the threaded contact piece, it is provided that the web can have a distance to the bolt head of the bolt for each screwing-in position of the bolt. The webs are then preferably designed and provided only for contact with the thread of the bolt. In contrast to a bolt fastening device which acts in the region of the bolt head, a defined clamping force and friction force can therefore be preset for each position of the bolt and during rotation of the bolt.

It can be provided that the web engages into the thread or can abut against the thread with an end edge which is formed between the end face and the flank of the web. The end edge together with the surfaces adjoining it is therefore guided in the thread path (gewinnowing) of the bolt, in particular during the tightening process, and therefore it is also possible to apply a defined clamping force to the bolt shank and the thread formed thereon during rotation of the bolt.

The webs can be bent at least in sections in the direction of the screw. The degree of bending or bending of the webs can be used to adjust the corresponding clamping force with which the thread is in contact.

According to an advantageous further development of the threaded contact piece, the bolt detent of the metal housing has a further web which bears against the thread of the bolt. Thus, the bolt brake can have not only one web, but also a first web and a second web.

Preferably, the first and second webs can be arranged opposite one another and can surround the thread of the screw on both sides. In particular, in this way, a symmetrical application of the clamping force of the bolt brake to the bolt can be achieved by means of two opposite webs.

The second web can be configured identically to the first web, wherein the first and second webs can be configured in particular mirror-symmetrical to a plane containing the bolt axis.

In order to limit or preset the clamping force, it can be provided that the first and second webs define an opening width which is smaller than the maximum thread diameter of the screw.

In particular, it can be provided that the first and second webs in the open position of the bolt can surround the bolt on the end face at the end of the bolt facing away from the bolt head or at the end of the thread and form a stop against which the thread can rest. During screwing in, the webs can be pushed away from one another, in particular at least partially, by the shank of the bolt and the thread, wherein the clamping force of the webs can be increased, in particular, by elastic deformation thereof.

It can be provided that the bolt can bear against the pressure piece with the end facing away from the bolt head, in particular the bolt. The screw can therefore be brought into direct contact with the pressure piece, so that screwing in of the screw can be converted by the pressure piece into a narrowing of the clamping opening. In particular, it can be provided that the pressure piece has an eccentric which is held pivotably on a metallic clamping housing.

The threaded contact piece can be designed as a front-side threaded terminal, wherein the clamping opening and the bolt can be arranged on the same housing side of the metal housing. Thus, for example, it can be provided that the clamping opening can be arranged directly adjacent to the bolt projecting from the housing in the open position.

It may be provided that the metal housing is surrounded by a plastic housing in order to be able to provide insulation from adjacent conductive parts.

Drawings

The invention is explained in detail below with reference to the drawings according to a preferred embodiment.

The figures show that:

fig. 1 shows a schematic perspective view of a threaded contact according to an embodiment of the present invention, with a partial Z,

figure 2 shows an enlarged view of a portion of figure 1,

figure 3 shows the threaded contact of figure 1 in a side view,

FIG. 4 shows the threaded contact of FIG. 3 in a cross-sectional view along section plane A-A in FIG. 3.

Detailed Description

Fig. 1 shows a threaded contact 100 for connecting an electrical conductor, which is not shown here.

The threaded contact 100 has a metal housing 110. The metal housing 110 has a clamping opening 111 for inserting the electrical conductor to be connected.

Furthermore, the threaded contact 100 has a pressure receiving member 120 or a pressure receiving mechanism formed by the pressure receiving member 120. The pressure receiving member 120 is accommodated in the metal housing 110 and is movably held on the housing 110 for narrowing and opening the clamping opening 111.

The threaded contact 100 has a bolt 130 for moving the pressure receiving member 120. The metal housing 110 comprises a bolt brake 112, which bolt brake 112 has a tab 113 abutting against a thread 131 of the bolt 130 and a further tab 114 abutting against the thread 131, such that the tab 113 forms a first tab and the tab 114 forms a second tab.

The

tabs

113 and 114 are integrally formed on the metal case 110 by punching.

For each screwed-in position of the bolt 130, each of the

webs

113, 114 has a distance to the bolt head 132 of the bolt 130, so that for any screwed-in position of the bolt 130 no contact occurs between one of the

webs

113, 114 and the bolt head 132.

As is shown in fig. 2, which is an enlarged view of detail Z in fig. 1, for example, for connecting web 113, connecting web 113 has an end edge 115 which is formed between an end face 116 of connecting web 113 and a side 117 facing bolt 130. The end edge 115 is provided and designed to engage in a thread 131 of the bolt 130 or to abut against the thread 131.

The further or second web 114 is formed symmetrically to the first web 113.

In the open position of the bolt 130 shown in fig. 4, the first tab 113 and the second tab 114 surround the thread 131 of the bolt 130 on the end side and in this way fix the bolt 130 in the open position.

The

webs

113 and 114 are arranged opposite one another and enclose the thread 131 of the bolt 130 on both sides. The first and

second tabs

113, 114 define an opening width W at the location shown in fig. 4 that is less than the maximum thread diameter D of the bolt 130.

Thus, when the screw is screwed into the nut thread 140, the

webs

113, 114 are pushed apart and pressed laterally, so that the clamping force is increased and adjusted to a defined value. In this case, the

webs

113 and 114 are only elastically deformed by the spring, so that a plurality of tightening processes with a defined, constant clamping force of the

webs

113, 114 in the direction of the thread 131 is achieved.

The end of the screw 130 in the form of a pin 133 facing away from the screw head 132 bears against the pressure piece 120, so that screwing in of the screw is converted into a movement of the pressure piece 120.

Here, the threaded contact piece 100 is designed as a front-side threaded terminal 100, wherein the clamping opening 111 and the bolt 130 are arranged on the same housing side 118 of the metal housing 110.

Description of the reference numerals

100 screw contact

110 casing

111 clamping opening

112 bolt brake

113 contact piece

114 contact strip

115 end edge

116 end face

117 side surface

120 pressure receiving piece

130 bolt

131 screw thread

132 bolt head

133 bolt

140 nut screw

Z local part

V enlarged view

Width of W opening

D thread diameter.

Claims

1. A threaded contact piece (100) for connecting electrical conductors, having a metallic housing (110), a clamping opening (111) for inserting an electrical conductor to be connected, a pressure piece (120), wherein the pressure piece (120) is accommodated in the housing (110) and is held displaceably on the housing (110) in order to narrow and open the clamping opening (111), and having a bolt (130) for displacing the pressure piece (120), characterized in that the metallic housing (110) comprises a bolt brake (112) having tabs (113, 114) which bear against a thread (131) of the bolt (130).

2. The threaded contact (100) according to claim 1, wherein the tabs (113, 114) are formed on the metallic housing (110) by stamping.

3. The threaded contact (100) according to claim 1 or 2, characterized in that the webs (113, 114) have a spacing relative to a bolt head (132) of the bolt (130) for each screwed-in position of the bolt (130).

4. The threaded contact (100) of claim 1,

the connecting piece (113, 114) engages with an end edge (115) in the thread (131) or rests on the thread (131), said end edge being formed between an end face (116) and a side face (117) of the connecting piece (113, 114).

5. The threaded contact (100) of claim 1,

characterized in that the webs (113, 114) are bent at least in sections in the direction of the screw (130).

6. The threaded contact (100) of claim 1,

characterized in that the screw stop (112) of the metal housing (110) has a further web which rests on a thread (131) of the screw (130).

7. The threaded contact (100) according to claim 6, characterized in that the first and second webs (113, 114) are arranged opposite one another and enclose the thread (131) of the bolt (130) on both sides.

8. The threaded contact (100) according to claim 6 or 7, wherein the first and second tabs (113, 114) define an opening width (W) that is less than a maximum thread diameter (D) of the bolt (130).

9. The threaded contact (100) according to claim 3, characterized in that the bolt (130) bears against the pressure piece (120) with an end (133) facing away from the bolt head (132).

10. The threaded contact (100) of claim 9, wherein the end (133) is a peg.

11. The threaded contact (100) according to claim 1, characterized in that the threaded contact (100) is designed as a front-side threaded terminal, wherein the clamping opening (111) and the bolt (130) are provided on the same housing side (118) of the metal housing (110).