WO2014172795A1

WO2014172795A1 - Plug connector

Info

Publication number: WO2014172795A1
Application number: PCT/CH2014/000048
Authority: WO
Inventors: Rolf Thiel; Reinhard Staub
Original assignee: Kistler Holding Ag
Priority date: 2013-04-24
Filing date: 2014-04-16
Publication date: 2014-10-30
Also published as: JP2019040889A; EP2989686A1; JP6726263B2; JP2016518686A; CH707943A2; CN105164860B; CN105164860A; EP2989686B1

Abstract

The invention relates to a plug connector, in particular a plug connector having a high level of electrical insulation. The plug connector was to be developed such that a mechanically stable and tight plug connection can be achieved, which additionally allows a quick and easy connection and disconnection even in harsh industrial environmental conditions. For that purpose the plug connector comprises a male plug part (1) and a female coupling part (2), wherein the male plug part (1) has a catch mechanism (3) on the circumferential surface and a locking groove (4) is provided on the female coupling part (2) to produce a bayonet-type plug connection. Here, an annular seal (5) is provided either on the circumference of the male plug part (1) ahead of the catch mechanism (3) or on the inner circumference of the female coupling part (2) shifted back with respect to the catch mechanism (3). When the plug connection is closed, the annular seal rests, exerting a sealing force, between the circumference of the male plug part (1) and the inner circumference of the female coupling part (2).

Description

Connectors Technical Field

The invention relates to a connector, in particular a connector with high electrical insulation, suitable for industrial use in harsh environmental conditions. It has a male plug part and a female coupling part, wherein the male plug part is provided with a latching cam on the peripheral surface and in the jacket of the female coupling part a latching groove for producing a bayonet connector is provided.

State of the art

Connectors are used in many areas of electrical engineering, such as industrial multi-channel measuring technology. They have to meet different application criteria.

Known threaded connectors in which a union nut is screwed onto a counterpart with external thread. The loosening and connecting can be very complex and the closure state is not clear and easy to check. SMC connectors with screw locking are very sensitive to harsh environmental conditions. By contrast, BNC plugs have much larger dimensions. They are suitable for laboratory applications. Such a BNC plug for radio frequency applications is shown in US-A-2003/0129870, which additionally has a bayonet closure. A plug part with locking groove is additionally provided with a rotatable knurled ring, which complicates the structure and increases the dimensions.

CONFIRMATION COPY Presentation of the invention

The invention is therefore the object of further developing existing connectors so that a mechanically stable and sealed plug connection can be reached, which also allows a quick and easy connection and disconnection even under harsh environmental conditions. In addition, a high electrical insulation for piezoelectric applications should be ensured. The connection should also be easily and quickly checked. The object is achieved by a connector with the features of claim 1. The inventive connector has a male connector part with a locking cam and a female coupling part with a locking groove. According to the invention, either the male plug part is mounted in advance on the circumference and the latching cam or a sealing ring is arranged on the inner circumference of the female coupling part of the latching cam. When the plug connection is closed, the sealing ring lies sealingly between the inner circumference of the female coupling part and the circumference of the male plug part.

The sealing ring thus seals radially between the male connector part and the female coupling part. Regardless of the depth of connection of the two parts of the connector to each other, the sealing ring is never crushed axially, since it rests only radially. This is important because the sealing ring is not subjected to the vibration vibrations of the coupling parts in this arrangement, so that its elastic property is not disturbed by vibrations. In addition, so-called triboelectric signal interference can occur by rubbing contacts in one movement and thereby generate electrical charge. This effect is extremely disturbing, especially in piezoelectric applications.

By means of the bayonet connection according to the invention, the plug resp. Clutch parts mechanically robust, tight and can be connected while maintaining existing dimensions of the plug. Such bayonet locks are suitable as a plug connection for electrical connectors under harsh environmental conditions, up to 150 ° C ambient temperature, while ensuring a high electrical insulation. Advantageous embodiments are disclosed in the dependent claims. The sealing ring is preferably an O-ring, in particular of temperature-resistant EPDM. Further preferably, the male connector part is provided with a sealing ring on the circumference and the locking cam upstream, whose outer diameter is adapted to the inner diameter of the female coupling part. The female coupling part may in particular have an internal compression spring.

The bayonet connector according to the invention allows a quick and safe loosening and connecting, since on the one hand only a rotational movement of about 90 ° is executed and on the other hand, the locking cam at the end of the rotational movement in a staggered terminal of the locking groove snaps, allowing a clear, secure closure state.

A connection and disconnection is also possible in confined spaces uncomplicated.

The connection is also due to the integrated seal by means of sealing dustproof and waterproof IP 67 IP. The inventive connector also allows the solution of a subtask, which is to allow the compact arrangement of many such connectors.

This sub-task is solved by means of a summing box according to patent claim 9, in which many connectors with straight cable management and without encapsulation of components can be arranged. The male connector parts are fixed on a connecting plate in one plane.

The connection plate is preferably received in a flange of a central circular connector, while the female coupling parts are routed through a ring plug.

In a preferred embodiment, the male connector parts are fixable on a, preferably detachable connection plate of the flange.

Brief description of the drawings

The invention will be explained in more detail below with reference to the drawings. It show the

1: inventively designed connector parts of a bayonet connection,

2 shows a bayonet connection according to the invention of the plug parts of FIG. 1, FIG.

3 shows a summing box for a multiple arrangement of bayonet connections according to FIG. 2. Ways to carry out the invention

Fig. 1 shows a male connector part 1 and a female coupling part 2 for producing a bayonet connection with little effort, which can also avoid accidental release of the connection. A jacket 22 of the female coupling part 2 is provided with a curved, preferably i ^¬ shaped locking groove 4 and the male connector part 1 with a corresponding locking cam 3. The locking cam 3 is mounted a groove in which an elastic sealing ring 5, for example in shape an O-ring made of temperature-resistant EPDM. The locking cam 3 on the male connector part 1 corresponds to the locking groove 4 on the female coupling part 2. In the jacket 22 of the female coupling part 2, a compression spring 6 is provided. The locking groove 4 has a vorversetzte terminal 18 (FIG. 1), in which the latching cam snaps into place 3, which prevents unintentional ^¬ te opening movement. Thus, a sustained secure coupling between the plug part 1 and the coupling part 2 is given. The connector preferably has a diameter of at most 6 mm.

A pin 9 in the female coupling part 2 is connected to a low-noise cable 7 with built-in strain relief 21. By means of another O-ring 17, a seal between the cable 7 and coupling part 2 is given. A corresponding seal can also be provided on the plug part 1.

When screwing the locking cam 3 by about 90 ° in the locking groove 4, an end face 19 of the male connector part 1 is pressed indirectly against the compression spring 6 and this is stretched. In a tensioned state, the compression spring 6 at the same time holds the locking cam 3 in the pre-offset terminal 18. This is Prevents the connection from inadvertently loosening because the spring collar must first be overcome.

In the arrangement according to the invention, the force of the compression spring 6 can be freely designed without having an influence on the sealing properties of the sealing ring 5.

When manufactured bayonet connector, an electrical contact between a pin 8, in the example a Lötanschlusspin and the pin 9 of the female coupling part 2 is formed. When releasing the compound, the compression spring 6 relaxes and pushes the male connector part 1 from the female coupling part. 2

The connector is electrically highly insulated with an insulation of at least 10 ¹² ohms. The connection between the coupling part 2 and the cable 7 is also sealed. A use of the connector at high ambient temperatures is guaranteed because all components used, in particular the sealing ring 5, can carry at least 150 ° C, which can be done by selecting suitable materials and dimensions.

FIG. 3 shows a further illustration of a summing box for a compact arrangement of many plugs of a multi-channel system, for example for flatness measurements in machines or installations. In this case, up to 100 male plug or female coupling parts, in Fig. 3 male connector parts 1 are fixed on a connection plate 14. The female coupling parts 2, shown only in broken lines in FIG. 3, and the associated cables 7, which are merely indicated, are formed by bores 16, which are provided peripherally in a receiving part 15 of a ring. attached pot 20 are pulled through and led to the male connector parts 1.

Before or after production of the inventive bayonet connectors, the connection plate 14 is connected to a flange 11 of a multi-pole circular connector 10. On the peripheral surface of the flange 11, in turn, a groove for a further O-ring 12 is provided, for the purpose of tight arrangement in a base, not shown. The connection plate 14 is seated on a sealing and compensation ring 13 on the flange 11.

Another advantage of the arrangement according to the invention is that it can be quickly checked at any time whether each connection is properly closed or not, since the locking cams 3 are visible from the outside. If you are sitting in the locking groove 4, the connection is correct. A ent ^¬ speaking alignment and arrangement of the bayonet connectors on a connecting plate 14, which allows a visual inspection of each individual connection is thus desirable. In order to simplify the inspection, the male connector parts 1 may have a signal color at the location, which is only visible thanks to the recess of the locking groove 4 when the connection is completely closed.

The flange 11 and the annular plug 20 can be connected, for example, by means of a clamping connection.

In such a compact connector assembly is given a straight cable management and there is no encapsulation of plug or other components required. All plug-in connections can be made quickly and safely and also released again. It is given a better tightness. The system is inexpensive to manufacture and handle. LIST OF REFERENCE NUMBERS

1 male connector, male

2 coupling part, female

3 locking cam

4 locking groove

5 sealing ring

6 compression spring

7 cables

8 pin, solder pin

9 pin

10 circular connectors

11 flange

12 o-ring

13 sealing and compensation ring

14 connection plate

15 recording session 1

16 hole

17 O-ring

18 forward offset terminal

19 face

20 ring plugs

21 strain relief

22 coat

Claims

Patent claims

Connector with high electrical insulation, which has a male plug part (1) and a female coupling part

(2), wherein the male plug part (1) has a locking cam

(3) is provided on the peripheral surface and a locking groove in the jacket of the female coupling part (2).

(4) is provided for producing a bayonet plug connection, characterized in that either on the circumference of the male coupling part (1), in front of the locking cam (3) or on the inner circumference of the female coupling part (2) set back to the locking cam (3). Sealing ring (5) is arranged, the sealing ring (5) resting sealingly between the inner circumference of the female coupling part (2) and the circumference of the male plug part (1) when the plug connection is closed.

Plug connector according to claim 1, characterized in that on the circumference of the male plug part (1), upstream of the locking cam (3), a sealing ring (5) is provided, the outer diameter of which lies sealingly against the inner diameter of the female coupling part (2).

Connector according to claim 1 or 2, characterized in that the sealing ring

(5) is an O-ring made of temperature-resistant EPDM.

Plug connector according to one of the preceding claims, characterized in that the locking groove (4) is J-shaped with an advanced end point (18).

Plug connector according to one of the preceding claims, in that a compression spring (6) is provided axially aligned in the female coupling part (2), against which when produced provided bayonet connection an end face (19) of the male coupling part (1) is indirectly pressed.

6. Connector according to one of the preceding claims, characterized in that it is designed to be electrically highly insulating with an insulation of at least 1012 ohms.

7. Connector according to one of the preceding claims, characterized in that all of its components are temperature-resistant in such a way that the connector can be used up to an ambient temperature of 150 ° C.

8. Connector according to one of the preceding claims, characterized in that it has a diameter of at most 6 mm.

9. Arrangement of a plurality of plug connectors according to one of the preceding claims in a summing box, characterized in that male plug parts (1) or female coupling parts (2) are fixed in one plane on a connection plate (14).

10. Arrangement according to claim 9, characterized in that the connection plate (14) is part of a flange (11) with a circular connector (10).

11. Arrangement according to claim 9 or 10, characterized in that on the connection plate (14) male

Plug parts (1) are fixed and that cables (7) with the associated female coupling parts (2) can be guided through a ring plug (20) to produce a bayonet plug connection and that after the ring plug (10) has been connected to the flange (11) can be connected, the connection plate (14) being arranged between the flange (11) and the ring plug (20).