阅读说明：本技术 高电流接触插座 (High current contact socket ) 是由 曼努埃尔·卡格胡贝尔 安东·梅尔 安德雷斯·布瑞瑟曼 于 2018-06-28 设计创作，主要内容包括：本发明涉及一种用于接收接触销并且用于与所述接触销产生电连接的高电流接触插座(1)。所述高电流接触插座包括：活塞(2),所述活塞带有接收空间(3)和围绕所述接收空间(3)布置的可径向运动的用于夹紧地接收所述接触销的夹紧元件(4)；和活塞引导部(5),所述活塞引导部部分地包围所述活塞(2)并且能够实现沿活塞纵向轴线(6)的运动。所述高电流接触插座(1)进一步包括至少一个在所述活塞(2)和所述活塞引导部(5)之间沿所述活塞纵向轴线(6)布置的检测导线(7),所述检测导线(7)用于测量能够被引入的接触销和/或所述高电流接触插座(1)的物理特性。(The invention relates to a high current contact socket (1) for receiving contact pins and for producing an electrical connection with said contact pins. The high current contact receptacle includes: a piston (2) having a receiving space (3) and a radially movable clamping element (4) arranged around the receiving space (3) for clampingly receiving the contact pin; and a piston guide (5) which partially surrounds the piston (2) and enables a movement along a piston longitudinal axis (6). The high-current contact socket (1) further comprises at least one detection line (7) arranged along the piston longitudinal axis (6) between the piston (2) and the piston guide (5), the detection line (7) being used for measuring a physical property of a contact pin that can be introduced and/or the high-current contact socket (1).)

1. A high current contact socket (1) for receiving a contact pin and for making an electrical connection with the contact pin, comprising:

-a piston (2), the piston (2) having a receiving space (3) and a movable clamping element (4) arranged around the receiving space (3) for clampingly receiving the contact pin, and

a piston guide (5) which partially surrounds the piston (2) and enables a movement along a piston longitudinal axis (6),

characterized in that said high current contact socket (1) further comprises:

at least one detection line (7.1) arranged between the piston (2) and the piston guide (5) along the piston longitudinal axis (6), the detection line (7.1) being used to measure physical properties of the contact pins and/or the high-current contact socket (1) that can be received.

2. High current contact socket (1) according to claim 1, wherein the clamping element (4) in the form of a caliper is supported by a spring (8), wherein the spring (8) dampens the movement of the clamping element (4).

3. High current contact socket (1) according to claim 1 or 2, wherein at least one resiliently arranged sensor device (10) is mounted on the clamping element (4), which sensor device is in contact with the high current contact socket (1) after the contact pins have been received therein, and the sensor device (10) is connected with the detection conductor (7.1) and is configured to transmit data to a control unit via the detection conductor (7.1).

4. High current contact socket (1) according to claim 3, wherein the sensor device (10) is configured for measuring a resistance.

5. High current contact socket (1) according to any of the preceding claims, wherein a further detection wire (7.2) is arranged between the piston (2) and the piston guide (5), and a further sensor device (11) is mounted on the end of the detection wire (7.2) projecting into the high current contact socket (1), which is configured to detect physical data and to transmit the physical data to the control unit via the further detection wire (7).

6. The high current contact receptacle (1) according to claim 5, wherein the further sensor device (11) is configured for measuring a temperature.

7. The high current contact receptacle (1) according to any one of the preceding claims, wherein the high current contact receptacle (1) has a connection device (13) on an end (12) opposite the contact pins for cooling the high current contact receptacle (1) by flowing air or gas along the piston longitudinal axis (6) into the hollow space (15) of the piston (2) when a predetermined temperature of the high current contact receptacle is exceeded.

8. High current contact socket (1) according to any of the preceding claims, wherein the piston (2) is configured with a hollow cylindrical shape.

9. High current contact socket (1) according to any of the preceding claims, wherein the piston (2) and/or the piston guide (5) are essentially made of copper with a low mixing amount of alloying elements, in particular with nickel, tellurium, beryllium or lead.

10. High current contact socket (1) according to any of the preceding claims, wherein the piston (2) and/or the piston guide (5) is coated with nickel and/or silver and/or palladium and/or gold and/or alloys with the aforementioned elements.

Technical Field

The invention relates to a high current contact socket for receiving contact pins and for producing an electrical connection with the contact pins according to claim 1.

Background

The contact elements are provided in particular to mechanically and electrically reliably connect the high-current connection device to, for example, a stranded conductor cable by means of the corresponding contact elements. In this case, high tensile forces, mechanical influences and vibrations are not permitted to lead to an undesired detachment of the connection.

It is known in the prior art to join stranded conductors to contact elements in a crimp connection or alternatively to make the stranded conductors connectable with the contact elements, wherein conical or cylindrical contact portions in the contact elements press the stranded conductors by axially or radially acting forces onto correspondingly shaped opposing faces, wherein the angles of the conical faces are usually equal.

DE 8914460U 1 discloses a contact system comprising a socket part and a plug part with resilient contact lugs for transmitting high currents.

FR 618171 a discloses an apparatus suitable for clamping electrical conductors for electrical devices, wherein in particular the wrapped electrical conductors are clamped within an insulated apparatus for installation.

EP 3121908 a1 discloses a plug connector with electrically conductive contact sockets. The contact receptacle is accessible through an opening in the plug connector. A closing element for closing the opening is movably supported in the contact receptacle.

The contact elements or contact sockets known from the prior art are not designed for high currents of more than 200A and are damaged by overheating as a result of said high currents.

Disclosure of Invention

The object of the invention is therefore to provide a contact socket which is suitable for high currents by using a constructively as simple manner as possible.

This object is solved by the subject matter of the independent claims. Advantageous developments of the invention are given in the dependent claims, the description and the figures.

The high current contact socket according to the invention is intended for receiving contact pins and for producing an electrical connection with the contact pins. The high current contact receptacle includes a plunger having a receiving space.

According to the invention, a radially movable clamping element is arranged around the receiving space for clampingly receiving the contact pin. The clamping element is preferably formed in the form of a caliper or by a clamping cage. The clamping cage is preferably constructed to comprise a plurality of elastic elements extending in the longitudinal direction of the piston. This construction can be accomplished by forming the clamping element, for example, from a clamping cage with slits.

The inner wall of the receiving space in which the clamping element is supported is configured with a control curve for radial tightening of the clamping element. The control curve means in the sense of the invention that the spring arms of the clamping cage are moved radially inward along the control curve from the contact pin introduction position into the contact pin clamping position upon actuation of the clamping element, so that the opening mechanism for the opening for receiving the contact pin is reduced, with which the clamping element is tightened.

In other words, the task of the control curve is to actuate the movable spring arms of the clamping cage such that the contact pins are increasingly forced by the spring arms and clamped when passing from the contact pin insertion position into the contact pin clamping position.

The control curve is preferably configured such that upon actuation of the clamping element the spring arms are urged inwardly, so that the clamping cage is continuously radially constricted. In this way, it is also directly perceptible when operating the high-current contact socket how the clamping force is continuously increased for clamping the contact pins when the clamping element is radially tightened.

Preferably, the clamping cage or caliper has at least two spring arms, particularly preferably at least four spring arms. The more spring arms, i.e. the more radial sections provided, the more resting points, i.e. the more contact points between the spring arms and the clamping pin, can be realized. In order to be able to compensate for tolerances better, it is also advantageous to have as many resting points as possible. Furthermore, it is achieved by the spring arm that any contaminants that may be present reach into the slot of the spring arm and thereby keep the actual contact position between the high-current contact socket and the contact pin clean.

The high current contact receptacle further has a piston guide that partially surrounds the piston and enables movement along a longitudinal axis of the piston. The piston is configured to be movable within the piston guide along the piston longitudinal axis. Preferably, a spring is arranged between the piston and the piston guide to bring the contact pin in a cushioned manner into a desired position when the contact pin is introduced. As soon as the end position is reached, the clamping element is closed and the contact pin is correspondingly held. Furthermore, the spring supports a reliable elastic return of the piston and thus of the spring arm at the end of the contacting process.

Preferably, the piston guide and the piston are made of a highly conductive copper alloy and are preferably provided with a coating. Preferably, the piston is made of copper with a low mix of alloying elements, such as nickel, tellurium, beryllium or lead, to maintain an optimal combination of electrical and thermal conductivity, spring action and machinability. Preferably, the piston and the piston guide are substantially coated with nickel and/or silver and/or palladium and/or gold for good corrosion protection, good friction protection and good contact properties. In a further embodiment, the piston guide is made of an electrically insulating, high-temperature-resistant material, such as a high-temperature plastic or ceramic, preferably, for example, Polyetheretherketone (PEEK), and thus has a high temperature stability and a good chemical stability. Thus, PEEK is stable to almost all organic and inorganic chemicals up to about 280 ℃, even to hydrolysis. The piston guide made of PEEK is electrically insulated, for example, in the required high-voltage application, with respect to the voltage-conducting part in the contact region.

Furthermore, the high-current contact socket has at least one detection line arranged along the longitudinal axis of the piston between the piston and the piston guide for measuring physical characteristics of the mountable contact pin and/or the high-current contact socket. Preferably, a sensor device is arranged within the clamping element. The sensor device is mounted resiliently, for example by bearing on a resiliently deformable silicone-based bed. With this sensor device, a four-terminal measurement or kelvin measurement can be carried out on the contact pins introduced. In the case of a possible distortion of the measurement due to the wire resistance and the connection resistance, a four-terminal measurement is carried out with the aid of a four-terminal connection when measuring the resistance. In a four-terminal measurement device, a known current flows through a resistor via two of the wires. The voltage drop across the resistor is detected in a highly resistive manner by two further lines and the voltage drop is measured with a voltage measuring device. The resistance to be measured is thus calculated according to ohm's law. The principle is similarly applicable to current measurement by means of low-resistance branches. In this case, the unknown current strength is determined by means of the voltage drop via a known resistance. In the four-terminal or kelvin measurement, the lead resistance of the measuring line and the contact resistance at the measuring point between the test piece and the measuring device are compensated. The same principle applies to capacitance and inductance measurements. Only problem-free contacting of the sample is required to ensure high-quality and reproducible measurements. In order to be able to adapt to the ever-increasing technological improvements, the requirements must be adapted continuously to the contact with the sample.

The sensor device is connected to the detection line by a connecting device and transmits the measured data to the control unit via the detection line and evaluates the data at the control unit. The sensor device is preferably configured to measure the resistance of the contact pin.

According to another embodiment, a further sensor device is mounted between the piston guide and the piston. The further sensor device is connected to a further detection line by means of a further connecting device. Preferably, the sensor means is a thermometer resting on the piston. The temperature in the high-current contact socket can be measured in particular by this further sensor device.

Preferably, the detection line and the sensor device for temperature measurement are guided from the contact surface through the piston into the rear end of the high-current contact socket in a groove specially made for the same and are connected at the rear end. The same applies to the leads of the calvin sensor.

Preferably, the high-current contact socket has a connection device on the end opposite the contact pins in order to cool the high-current contact socket by flowing air or gas along the longitudinal axis of the piston into the hollow space of the piston in a manner measurable by a further sensor device when a predetermined temperature of the high-current contact socket is exceeded. By actively cooling the high-current contact socket from a predetermined temperature, higher currents, in particular currents up to values of 1000 amperes or more, can be achieved. Good cooling is achieved not only by the central device bore but also by the slotted plate/spring arm having a very large surface. Possible contaminants deposited between the spring arms can be thrown out by short bursts of air flow with high pressure.

The use of the high-current contact socket according to the invention results in the advantage that high currents are used, since the heat generated which may damage the high-current contact socket can be reduced by the integrated cooling capacity. Thus, for example, 1500 amps of current may be applied for 20 seconds or 500 amps may be applied. A series of tests have shown that, when air having a pressure of 1 bar is supplied, the temperature formed can be reduced without cooling from, for example, 200 ℃ to 80 ℃.

Drawings

Advantageous embodiments of the invention are explained below by referring to the drawings. The figures are as follows:

FIG. 1 shows a diagrammatic view of a high current contact receptacle according to the present invention;

FIG. 2 shows a cross-sectional view of a high current contact receptacle according to the present invention; and is

Fig. 3 shows a diagrammatic representation of a clamping element of a high-current contact socket according to the invention.

The figures are only schematic representations and are only intended to explain the invention. Identical or functionally identical elements are generally provided with the same reference numerals.

Detailed Description

Fig. 1 shows a schematic cross-sectional view of an electrically conductive high-current contact socket 1. The high-current contact receptacle 1 is constructed substantially rotationally symmetrical with respect to the central axis 6. The high-current contact socket 1 is constructed for receiving contact pins, not shown, in the receiving space 3. Furthermore, the high-current contact socket 1 is configured for producing an electrical connection between the high-current contact socket 1 and the contact pins even at high currents.

When introduced in the plug-in direction 21, a contact pin, not shown, is pressed onto the distal connection surface 17 of the receiving space 3 and thereby moved in the plug-in direction 21 in the receiving space 3.

The receiving space 3 has a clamping element 4 for a contact pin. As can be seen in fig. 2 and 3, the control curve 20 is constructed from a conically extending wall section, the inner radius of which decreases from a first inner diameter R1 to a second inner diameter R2 and then transitions into a cylindrical section with a diameter R2.

The outer diameter R2 is preferably 20mm to 25mm, and the inner diameter is preferably 16mm to 20 mm.

As shown in fig. 2 and 3, the spring arms extend with their spring arm ends outwardly conically, so that the ends of the clamping cage 19 projecting into the high-current contact socket have an outer diameter which is substantially equal to the inner diameter R1 at the upper end of the control curve 20. The spring arms 18 of the clamping cage 19 thus extend in a slightly curved conical shape. By reducing the inner diameter of the clamping cage 19, the contact pins are held clamped in the clamping cage 9.

Fig. 2 shows a cross-sectional view of a high-current contact socket 1 according to the invention. Contact pins, not shown, can be introduced into the receiving space 3 of the piston 2 in the plug-in direction 21. The contact pins are held in the piston 2 by a clamping element 4, preferably formed by a caliper or a clamping cage. The piston 2 is pushed along the piston longitudinal axis 6 by the introduction of the contact pins in the plug-in direction 21. At the pistonA spring 8 is arranged between the piston 2 and the piston guide 5 partially enclosing the piston 2. Furthermore, the spring supports a reliable elastic return of the piston and thus of the spring arm at the end of the contact process and serves to open the clamping element when the contact is released. The housing closure device 21 serves to fix the piston guide 5 to the housing 14 of the high-current contact socket 1. The piston closure nut 22 fixes the piston 2 and thereby prevents the piston 2 from being released from the housing 14. The threaded portion 24 receives the piston gland nut 22 and the lock nut 23. Clamped between the piston gland nut 22 and the union nut 23 and connected thereto, not shown, with a diameter of, for example, 35mm²Cable boots for the above wires. Of course, smaller cross-sections may also be used.

The piston 2 is provided with a hole in the interior, into which the pin extends completely, and the piston 2 is provided with a hose connection 13 on the rear end. The connection 13 and the hole enable cooling of the contact portion, for example by means of pressure air. This serves to reduce the temperature generated at high currents and in particular at high cycle times. In order to measure the temperature of the high-current contact socket 1 and correspondingly to introduce air or gas for cooling into the high-current contact socket 1, a detection line 7 with a sensor device 11 is provided between the piston 2 and the piston guide 5. The sensor device 11 preferably measures the temperature as close as possible to the head of the piston 2 and sends the data to a control unit (not shown) which introduces cooling air depending on the temperature, so that the contact socket 1 is not damaged by excessive temperatures in the event of high currents. The large surface is achieved by means of the caliper principle or the clamping cage, which combines with cooling and ensures good heat dissipation even on the contact pins (test specimens).

In addition, in order to determine a physical quantity, for example, an electrical resistance, for example, by means of a four-terminal measurement or kelvin measurement at the contact pins, a detection line 7 is arranged between the piston 2 and the piston guide 5. Sensor means 10 belonging to the detection wire 7 are arranged in the receiving space 3. The sensor device 10 is mounted elastically, for example on silicone, so that a reliable contacting of the sensor device 10 with the contact pins is achieved and the sensor device 10 is not damaged when the contact pins are introduced into the high-current contact socket 1. The silicone is preferably a high temperature resistant silicone.

Both the detection lead 7 and the sensor means 10, 11 are made of a material that withstands a temperature of at least 200 ℃. Preferably, the sensing wire is a silver plated copper strand with polytetrafluoroethylene insulation (PTFE). The sensor device for kelvin measurements is preferably made of a copper alloy (with gold plating if necessary) or a silver alloy with a sensor device for temperature measurement made of NiCr with a glass fiber insulation.

By means of the two sensor devices 10, 11, parameters such as temperature, resistance or the like of the high-current contact socket 1 or contact pins can be generated and correspondingly responded to by cooling the high-current contact socket.

List of reference numerals

1 high current contact socket

2 piston

3 receiving space/contact opening

4 clamping element

5 piston guide

6 longitudinal axis of piston

7.1 detection wire

7.2 Another test wire

8 spring for piston return

9 relative support part

10 sensor device

11 further sensor device

12 end part

13 connecting device

14 casing

15 hollow space

16 main spring

17 distal joint face

18 spring arm

19 clamping cage

20 control curve

21 casing closing device

22 piston closing nut

23 locking nut

24 screw part

25 introduction direction of contact pins