BE1032009A1 - Connector part with strain relief - Google Patents

Abstract

A plug connector part (1) for plugging into a mating connector part, comprising a plug-in section (11) to be plugged into the mating connector part, at least one electrical contact element (111A-111N) connectable to a line (100) and arranged in the plug-in section (11), a housing part (3) and a housing cover (4) connectable to the housing part (3), and a strain relief device (2, 2'-2''') designed to receive and clamp in place a line (100) connected to the at least one contact element (111A-111N), comprising a first and a second clamping device (21A, 21B) and two spacer elements (23A, 23A'-23A''', 23B, 23B'-23B'''), each arranged between the first and second clamping device (21A, 21B), wherein the housing cover (4) has a through-opening for the passage of the cable (100), and wherein the strain relief device (2, 2'-2''') can be arranged on the housing part (3) and, in the mounted position of the housing cover (4), is held by the housing cover (4) on the housing part (3).

Description

Connector part with strain relief

The invention relates to a connector part for plugging into a

Mating connector part according to the preamble of claim 1.

Such a connector part comprises a plug-in section to be connected to the mating connector part, at least one electrical contact element that can be connected to a line and can be arranged in the plug-in section, a housing part and a housing cover that can be connected to the housing part.

Such a connector part can be used, for example, in a charging system for charging an electric vehicle and can, for example, be used as a so-called

A charging socket can be designed, for example, as a fixed connection to a vehicle, into which a charging plug can be inserted to establish an electrical connection to a charging station. Alternatively, such a connector part can also be designed as a charging plug that can be inserted into an associated charging socket.

Such a connector part consists of one or more electrical cables or

Cables connected to one or more electrical contact elements. The

Contact elements are arranged in such a way that they reach into the area of the plug-in section and thus, when plugged in, with an assigned

Mating connector part via the contact elements an electrical connection to the

Mating connector part, in particular mating contact elements arranged thereon, can be manufactured.

With such a connector part, it is necessary to provide strain relief for the

electrical line connected to contact elements in order to

To prevent the transmission of forces acting on the cable to the contact elements.

For such strain relief it is necessary to connect the contact elements

The cable must be fixed to the housing in such a way that forces acting on the cable, for example, are diverted into the housing and do not act on the contact elements.

It is desirable to integrate a strain relief for different power sizes into the connector part with a few inexpensive components, which is also easy to handle, so that the strain relief can be removed during assembly of the

connector part can be manufactured in a simple manner.

Strain relief devices for different cable sizes are described, for example, in DE 10 2015 112 045 B4, DE 43 09 330 A1 and DE 1 758 841 U1.

The object of the present invention is to provide a connector part with a

To provide strain relief for a cable connected to at least one contact element, which is suitable for different cable sizes and is easy to handle.

This object is achieved by an article having the features of claim 1.

Accordingly, the connector part has a strain relief device which is designed to receive a line connected to the at least one contact element and to clamp it, comprising a first and a second clamping device and two

Spacer elements which can each be arranged between the first and second clamping device, wherein the housing cover has a through-opening for the passage of the cable, and wherein the strain relief device can be arranged on the housing part and is held by the housing cover on the housing part in the mounted position of the housing cover.

The housing part can be connected to the mating connector part

plug-in section, or alternatively be constructed in several parts, whereby a

Housing element of the housing part can have the plug-in section.

The cable may also be referred to herein as a load cable or just as a cable and may have at least one conductor made of an electrically conductive material, such as

Copper, which is connected to the contact element. However, the cable can also have more than one conductor, such as 5 or 7 conductors, which run insulated from one another in the cable and are connected to corresponding contact elements that can be arranged in the plug-in section. The conductor cross-section can be cylindrical, square, rectangular, or flat, at least in some areas. The conductor can have an insulating sheath made of a plastic material, such as PE (polyethylene), PP (polypropylene), PVC (polyvinyl chloride), PUR (polyurethane), etc.

The strain relief device can be clamped to the cable or a section of the cable in the installed position, preventing displacement of the strain relief device along an extension direction of the cable. For this purpose, the strain relief device has two clamping devices.

Clamping devices can be band-shaped and made of a metal or plastic material. Furthermore, the clamping devices can each have a curved

A region that can essentially correspond to an outer geometry of the line. In the assembled position, the curved regions can be arranged around the line.

The two spacers are each between the first and the second

Clamping device can be arranged, or arranged in the mounted position. As

Spacer element can be understood here as a block-like material section of a metal or plastic material with which a distance between the

clamping devices can be increased. A spacer element can be arranged between corresponding end areas of the clamping devices in order to

Increase the distance between the clamping devices.

By using spacer elements from a variety of

Spacer elements with different heights can advantageously

Modular strain relief device for different cable sizes, i.e.

Cable diameters or cable cross-sections can be configured so that the

Strain relief device can be securely clamped to the cable without damaging the cable.

The strain relief device can be arranged on the housing part (3) or can be inserted into the housing part at least in part. For example, the

The strain relief device can be inserted into an opening in the housing part, for example plugged in, and in the installed position is inserted into the housing part at least in part and is held by the housing cover in or on the housing part. The housing cover has a through-opening through which the cable extends from the housing part. The housing cover can enclose the area of the strain relief device that protrudes from the housing part in a shell-like manner and is connected to the housing part in the installed position; for example, the housing cover can be screwed to the housing part.

By accommodating the strain relief device in a space that is delimited by the housing part and the housing cover, the strain relief device and the cable clamped therein can be held to the housing part, so that forces acting on the

line cannot be transferred to a contact element to which the line is connected.

To create the strain relief, the cable is first clamped in the clamping devices or the strain relief device is arranged around the cable.

The strain relief device is then arranged on the housing part or at least partially inserted into the housing part and the

Housing cover connected to the housing part.

Because the strain relief device is designed as a separate assembly, the strain relief device can be easily clamped to different cables with different diameters before the

Strain relief device is arranged on or in the housing part.

In one embodiment, the housing cover can be detachably connected to the housing part, in particular via a screw or snap-in connection. For example, the

Housing cover can be positively connected to the housing part or is positively connected in the assembled position.

In one embodiment, the housing part and the strain relief device each have at least one first coupling element, wherein the first coupling elements are configured to correspond to one another, for fixing the

Strain relief device on the housing part.

The first coupling elements can also be referred to as alignment elements and serve as an assembly aid for aligning the strain relief device on the

Cable. The loosely mounted strain relief device can be placed on the cable so that the cable can still be moved by the strain relief device and pushed against or into the housing part. The first coupling elements can interlock in such a way that the

The strain relief device can only move in or out of the housing part, but cannot be rotated around its own axis.

In one embodiment, the at least one first coupling element is on the

Strain relief device groove-shaped, in particular as longitudinal in

Slot extending in the direction of extension of the cable received, at a first

End region formed in the material of at least one of the spacer elements, and the corresponding first coupling element on the housing part is formed in the shape of a web, in particular as a web extending longitudinally in the direction of extension of the accommodated line, in the material of the housing part. 5 In this case, the groove-shaped first coupling element on the

Strain relief device in the corresponding web-shaped

Coupling element engages or is inserted into the housing element.

In one embodiment, the housing cover and the strain relief device each have at least one second coupling element, wherein the second

Coupling elements are designed to correspond to each other, for determining the

Strain relief device on the housing cover.

The second coupling elements can also be referred to as anti-twist elements. By using the second coupling elements, if necessary together with the first coupling elements, the strain relief device can be securely fixed in the

The gap formed by the housing part and the housing cover must be maintained.

In one embodiment, the at least second coupling element is on the

Strain relief device groove-shaped, in particular as longitudinal in

Slot running in the direction of extension of the cable, at a second

End region formed in the material of at least one of the spacer elements, and the corresponding second coupling element is formed on the housing cover in the form of a web, in particular as a web extending longitudinally in the direction of extension of the accommodated line, in the material of the housing cover.

In this case, the second end region can be arranged opposite the first end region. Furthermore, a first

coupling element can be arranged and a second coupling element can be arranged at the opposite second end region. Alternatively, a first

Only a first coupling element may be arranged on a spacer element of the two spacer elements and only a second coupling element may be arranged on a second spacer element of the two spacer elements.

In one embodiment, the connector part has at least one connecting element which is adapted to connect an end region of the clamping devices via one of the

To connect spacer elements to one another, in particular to connect them detachably to one another.

For example, the connector part can have two similarly constructed

connecting elements, wherein a first connecting element comprises the first

End regions of the clamping devices are connected to one another via a first spacer element and a second connecting element connects the second end regions of the

Clamping devices are connected to each other via a second spacer element.

For this purpose, the connecting elements can be pin-shaped and can be

Openings in the clamping devices and the spacer elements extend to the

To move and fix the clamping devices towards each other so that the cable can be clamped between the two clamping devices.

In one embodiment, the at least one connecting element is designed like a screw.

For example, the connecting element can be designed as a screw, for

Screwing the clamping devices together. In alternative designs, the

The connecting element can also be designed as a locking hook or as a bayonet connector.

In one embodiment, the spacer elements comprise rod elements that can be inserted into openings in the end regions of the clamping devices.

The rod elements can extend from the base bodies of the spacer elements to engage the corresponding openings in the clamping devices. This allows for a stable structure of the strain relief device.

In one embodiment, the connector part has a plurality of spacer elements with at least two different heights, wherein the spacer elements

Modular from the variety of spacer elements can be selected for a specific

Pipe diameter of the pipe.

By providing a variety of spacer elements with a different

Height can be a strain relief device for cables with different

cable diameters are provided.

The concept underlying the invention will be explained in more detail below with reference to the exemplary embodiments illustrated in the figures. They show:

Fig. 1A, 1B Views of an embodiment of a strain relief device on a cable in a perspective exploded view and in a perspective view showing an assembled position of the

Strain relief device on the cable;

Fig. 2 is a perspective detailed view of a spacer element;

Fig. 3A-3D front views of strain relief devices with spacer elements of different heights;

Fig. 4 Perspective views of two clamping devices and two

Connecting elements with spacer elements of different heights;

Fig. 5 is a perspective view of the connector part without the housing cover;

Fig. 6 is a perspective view of a housing cover;

Fig. 7 is a side view of the connector part;

Fig. 8 is a sectional view along the line A-A according to Fig. 7; and

Fig. 9 a perspective view of the connector part.

The embodiment of a strain relief device 2 shown in Figures 1A and 1B has a first and a second clamping device 21A, 21B and two spacer elements 23A, 23B, which can each be arranged between the first and second clamping device 21A, 21B.

In Figures 1A and 1B, the strain relief device 2 is arranged around the cable 100 shown. The cable 100 shown has a plurality of conductors 101A-101N, which can be arranged on corresponding contact elements in a plug-in section (shown in Figure 9). The cable 100 shown has an insulating sheath made of a plastic material. In the mounted position shown in Figure 1B, the strain relief device 2 is clamped to the cable 100, preventing displacement of the strain relief device 2 along an extension direction, or running direction, of the cable 100.

The clamping devices 21A, 21B shown in the embodiment are

Stamped and bent parts formed or punched out from a sheet metal strip.

Furthermore, the two clamping devices 21A, 21B each have a curved

Area that essentially corresponds to an outer geometry of the line 100. In the mounted position shown in Figure 1B, the curved areas are arranged around the line 100. In the curved areas, in the embodiment shown,

Grip elements 213AA-213AN, 213BA-213BN are arranged, which in the mounted position shown in Figure 1B press into the material of the line 100 to form a

To further complicate pulling the cable 100 through the mounted strain relief device 2.

The two spacer elements 23A, 23B shown in the exemplary embodiment are arranged in the mounted position between the first and second clamping devices 21A, 21B. The spacer elements 23A, 23B are designed as block-like

material sections and serve the purpose of maintaining a distance between the

clamping devices 21A, 21B. As shown in Figures 1A and 1B, a spacer element 23A, 23B is provided between corresponding end regions of the

Clamping devices 21A, 21B are arranged. In Figure 2, a spacer element 23A is shown in a higher level of detail.

The end portions of the clamping devices 21A, 21B shown are in the mounted position shown in Figure 1B, by means of the screws shown

Connecting elements 25A, 25B are connected to each other. For this purpose, the

Connecting elements 25A, 25B through openings 211AB, 211BB, 233A, 233B in the

clamping devices 21A, 21B and the spacer elements 23A, 23B.

Also, the spacer elements 23A, 23B of the device shown in Figures 1A and 1B

The embodiment comprises rod elements 231AA-231AN, 231BA-231BN, which are inserted in openings 211AA-211AN, 211BA-211BN in the end regions of the clamping devices 21A, 21B in the assembled position.

Figure 2 shows a perspective detailed view of the spacer element 23A previously shown in Figures 1A and 1B. The spacer element 23A shown can be used as

The injection-molded part is made of a plastic material. Shown are cylindrical and rectangular rod elements 231AA-231AN, which extend laterally from the

Main body of the spacer element 23A to engage in corresponding openings in the clamping devices. Furthermore, in Figure 2, the opening 233A for

Inserting the connecting element is shown, which is designed as a through opening.

The spacer element 23A shown furthermore has at a first end region a first

Coupling element 235A, which is groove-shaped, as a longitudinal slot running in the direction of extension of the accommodated line, in the material of the spacer element 23A and is connected to a corresponding first coupling element on the

Housing part can be coupled or connected as shown below in Figure 5.

At a second end region of the spacer element 23A, which is opposite the first end region, a second coupling element 237A is arranged, which is also groove-shaped as a longitudinal slot in the material of the spacer element 23A, extending in the direction of extension of the accommodated line, and can be coupled or connected to a corresponding second coupling element on the housing cover, as shown below in Figures 6 and 8. In the embodiment shown in Figure 2, the slot-shaped second coupling element 237A is deeper and wider than the first

Coupling element 235A.

Figures 3A to 3D show front views of strain relief devices 2, 2', 2", 2" with spacer elements 23A, 23A', 23A", 23A", 23B, 23B', 23B", 23B" of different heights. The strain relief device 2 shown in Figure 3B is the one already described in the

Figures shown strain relief device 2. The strain relief device shown in Figure 3A

Strain relief device 2° comprises spacer elements 23A‘, 23B*‘ with a lower

Height than the spacer elements 23A, 23B of the one shown in Figure 3B

Strain relief device 2, for receiving a cable with a lower

Diameter. The strain relief devices 2", 2" shown in Figures 3C and 3D comprise spacer elements 23A", 23A"", 23B", 23B" with a greater height than the

Spacer elements 23A, 23B of the strain relief device 2 shown in Figure 3B, for

Accommodates cables with a larger diameter. The shown

Clamping devices 21A, 21B are designed similarly in Figures 3A-3D.

The spacer elements 23A, 23A', 23A", 23A'", 23B, 23B, 23B", 23B" in the shown

In some embodiments, a section pointing in the direction of the cable in the mounted position is concave, i.e. with an inward curvature, for

Connect to the cable.

Figure 4 shows perspective views of two clamping devices 21A, 21B and two connecting elements 25A, 25B with spacer elements 23A, 23A', 23A", 23A", 23B, 23B, 23B", 23B", of different heights. The elements shown correspond to the elements already shown in Figures 3A-3D. As shown in Figure 4, the spacer elements 23A, 23A', 23A", 23A", 23B, 23B', 23B", 23B" can be selected for a specific cable diameter.

Figure 5 shows a view of the connector part 1 without the

Housing cover. In the embodiment shown in Figure 5, the line 100 is in the

Strain relief device 2 and clamped in place. As shown, the

Strain relief device 2 is partially inserted into the housing part 3.

In the embodiment shown, the housing part 3 and the

Strain relief device 2 each has at least one first coupling element 31, 235A, the first coupling elements 31, 235A are configured to correspond to one another, for fixing the strain relief device 2 to the housing part 3. The first

Coupling elements 31, 235A can be used as alignment elements and serve as an assembly aid for the alignment of the strain relief device 2 on the

Cable 100. For example, the strain relief device 2 can initially be placed loosely mounted on the cable 100, in that the connecting elements 25A, 25B are not yet fully inserted, so that the cable 100 can still be

Strain relief device 2 is displaceable, and the strain relief device 2 can be pushed against the housing part 3. Here, the first coupling elements 31, 235A engage with each other in such a way that the strain relief device 2 can only be pushed into the

Housing part 3 can be moved in or out, but cannot be rotated about its own axis. For this purpose, as already shown, the first coupling element 235A on the strain relief device 2 is groove-shaped, in particular as a longitudinal

The slot extending in the direction of extension of the accommodated line 100 is formed at the first end region in the material of the spacer element 23A, and the corresponding first coupling element 31 on the housing part 3 is web-shaped, as a web extending longitudinally in the direction of extension of the accommodated line 100, in the material of the housing part 3.

Here, the groove-shaped first coupling element 235A can be attached to the

Strain relief device 2 into the corresponding web-shaped first

Coupling element 31 on the housing part 3 engage, or are pushed in. In Figure 5, only a first coupling element 31, 235A is visible. However, the housing part and the second cover element, which is covered by the line 100 in Figure 5, each have a further corresponding first

coupling element.

Figure 6 shows a perspective view of a housing cover 4 with a strain relief device 2 incorporated therein, which is shown without the cable clamped therein for the sake of clarity. The housing cover 4 shown in Figure 6 can be arranged on the housing part 3 shown in Figure 5 and connected to it. The assembled position of the housing part 3 and the housing cover 4 is shown in Figure 7.

In the mounted position, the cable can be guided through the shown through-opening 41. The shown first coupling elements 235A, 235B of the

Strain relief device 2 are in the mounted position in the corresponding first

Coupling elements are inserted into the housing part.

In the embodiment shown in Figure 6, the housing cover 4 and the

Strain relief device 2 each has at least one second coupling element 237A, 43A, which are configured correspondingly to one another, for fixing the strain relief device 2 to the housing cover 4. The second coupling element 43A on the housing cover 4 prevents the strain relief device 2 from sliding out of the housing cover 4 in the direction of the connected cable. Furthermore, the second coupling elements 237A, 43A serve as anti-twist elements.

Use of the second coupling elements 237A, 43A together with the first

Coupling elements, the strain relief device 2 is held securely in the mounted position in the space formed by the housing part 3 and the housing cover 4, as shown in Figure 8. As shown in Figure 6, the at least second

Coupling element 237A on the strain relief device 2 groove-shaped as longitudinal in

Slot running in the direction of extension of the cable, at a second

End region is formed in the material of the spacer element 23A, and the corresponding second coupling element 43A is formed in a web-shaped manner on the housing cover 4, as a web running longitudinally in the direction of extension of the accommodated line, in the material of the housing cover 4.

Figure 7 shows a side view of the connector part 1 in the assembled position, with the housing part 3 connected to the housing cover 4. Figure 8 shows a

Sectional view along the line A-A according to Fig. 7 of the between the housing part 3 and

Housing cover 4 held strain relief device 2. At an end of the housing cover 4 facing away from the housing part 3, a stop surface 45 is arranged around the opening 41, which is adapted to prevent movement of the strain relief device 2 from the

The provision of a separate stop surface is optional, since in the mounted position the

Strain relief device securely between the cooperating first and second

coupling elements.

Figure 8 also shows a view of the second spacer element 23B of the

Strain relief device 2. As shown, the corresponding second

Coupling elements 237B, 43B engage with each other.

Figure 9 shows a perspective view of the connector part 1 with a housing part 3, a housing cover 4 and a cable 100 connected to the connector part 1. In the embodiment shown, electrical

Contact elements 111A-111N are arranged, which are connected to the line 100.

List of reference symbols 1 Connector part 11 Plug-in section 111A-111N Contact element 2.22" Strain relief device 21A, 21B Clamping device 23A, 23A'-23A", 23B, 23B'-23B"" Spacer element 25A, 25B Connecting element 211AA-211BN Opening 213AA-213BN Grip element 231AA-231BN Rod element 233A, 233B Opening 235A, 235B First coupling element 237A, 237B Second coupling element 3 Housing part 31 First coupling element 4 Housing cover 41 Opening 43A, 43B Second coupling element 45 Stop surface 100 Cable 101A-101N Conductor

Claims (11)

Patent claims 1. A connector part (1) for plugging into a mating connector part, comprising a plug-in section (11) to be plugged into the mating connector part, at least one electrical contact element (111A-111N) connectable to a line (100) and arranged in the plug-in section (11), a housing part (3) and a housing cover (4) connectable to the housing part (3), characterized by a strain relief device (2, 2-2"), which is designed to receive and clamp a line (100) connected to the at least one contact element (111A-111N), comprising a first and a second clamping device (21A, 21B) and two spacer elements (23A, 23A'-23A"", 23B, 23B'-23B'"), each arranged between the first and second clamping device (21A, 21B), wherein the housing cover (4) has a through-opening for the passage of the cable (100), and wherein the strain relief device (2, 2-2") can be arranged on the housing part (3) and, in the mounted position of the housing cover (4), is held by the housing cover (4) on the housing part (3). 2. Connector part (1) according to claim 1, characterized in that the housing cover (4) is detachably connectable to the housing part (3), in particular detachably connectable via a screw or snap-in connection. 3. Connector part (1) according to claim 1 or 2, characterized in that the housing part (3) and the strain relief device (2, 2-2") each have at least one first coupling element (235A, 235B, 31), wherein the first coupling elements (235A, 235B, 31) are designed to correspond to one another, for fixing the strain relief device (2, 2-2") to the housing part (3). 4. Connector part (1) according to claim 3, characterized in that the first coupling element (235A, 235B) on the strain relief device (2, 2-2") is groove-shaped, in particular as a slot extending longitudinally in the direction of extension of the received cable (100), at a first end region in the material of at least one of the spacer elements (23A, 23A'-23A" 23B, 23B'-23B'"), and the corresponding first coupling element (31) on the housing part (3) in the form of a web, in particular as a web extending longitudinally in the direction of extension of the received line (100), in the material of the housing part (3). 5. Connector part (1) according to claim 3 or 4, characterized in that the housing cover (4) and the strain relief device (2, 2-2") each have at least two mutually corresponding first coupling elements (235A, 235B, 31). 86. Connector part (1) according to one of the preceding claims, characterized in that the housing cover (4) and the strain relief device (2, 2-2") each have at least one second coupling element (237A, 237B, 43A, 43B), wherein the second coupling elements (237A, 237B, 43A, 43B) are designed to correspond to one another, for fixing the strain relief device (2, 2-2) to the housing cover (4). 7. Connector part (1) according to claim 6, characterized in that the second coupling element (237A, 237B) on the strain relief device (2, 2°-2”) is groove-shaped, in particular as a slot running longitudinally in the direction of extension of the received cable (100), at a second end region in the material of at least one of the spacer elements (23A, 23A'-23A"“ 23B, 23B'-23B'”), and the corresponding second coupling element (43A, 43B) on the housing cover (4) is web-shaped, in particular as a web running longitudinally in the direction of extension of the received cable (100), in the material of the housing cover (4). 8. Connector part (1) according to one of the preceding claims, characterized by at least one connecting element (25A, 25B) which is adapted to connect, in particular to detachably connect, an end region of the clamping devices (21A, 21B) via one of the spacer elements (23A, 23A'-23A", 23B, 23B"-23B"). 9. Connector part (1) according to one of the preceding claims, characterized in that the at least one connecting element (25A, 25B) is designed in a screw-like manner. 10. Connector part (1) according to one of the preceding claims, characterized in that the spacer elements (23A, 23A-23A", 23B, 23B''-23B”) have rod elements (231AA-231BN) which can be introduced into openings (211AA-211BN) in the end regions of the clamping devices (21A, 21B). 11. Connector part (1) according to one of the preceding claims, characterized by a plurality of spacer elements (23A, 23A-23A", 23B, 23B'-23B'") with at least two different heights, wherein the spacer elements (23A, 23A'-23A", 23B, 23B'-23B'") are modularly selectable from the plurality of spacer elements (23A, 23A'-23A", 23B, 23B'-23B'") for a specific line diameter of the line (100).