Electric load switch

Abstract

The invention provides an electric load switch which at least comprises an insulating shell and an internal element, the insulating shell is provided with a cover plate, and the internal element is at least provided with a moving contact assembly, a static contact assembly, a motor, a transmission gear set and a connecting rod or a connecting piece. A mounting plate or a partition plate is arranged in the middle of the insulating shell and divides the insulating shell into an upper layer and a lower layer, the internal elements are arranged on the mounting plate or / and the insulating shell, part of the internal elements are arranged on the upper layer, and part of the internal elements are arranged on the lower layer. The internal elements are arranged in a layered manner, so that the surface area is greatly reduced, and installation and use are facilitated; the electric signals of the shunt sampling, the load switch control and the zero sequence mutual inductor all adopt pcb wiring terminals and are transmitted through PCB wiring, so that the introduction of larger impedance by excessive outgoing lines is avoided, and the anti-interference capability of the load switch in a complex electronic environment is improved.

Description

Technical Field

[0001] The present invention relates to the field of low-voltage electrical appliances, and particularly to an electrical load switch. Background Art

[0002] The load switches used in power systems mainly have two structures: electromagnetic-driven load switches and motor-driven load switches. The electromagnetic-driven load switch has the advantages of simple structure and small volume, but at the same time has the disadvantage of small contact opening distance. With the improvement of the power system's requirements for safety indicators such as electrical clearance of load switches, it has become very difficult for electromagnetic-driven load switches to meet the new requirements. The motor-driven load switch has the advantages of large contact opening distance and strong overload capacity, and very well meets the application requirements of the power system for load switches in terms of technical indicators. However, due to the complex structure of the motor-driven load switch, the volume of the load switch is relatively large. In particular, the load switches of the prior art adopt a structure in which a motor, a transmission gear set, a moving contact assembly, and a static contact assembly are arranged radially along the gear shaft. This results in a large surface area of the existing load switch and is not convenient for installation, greatly limiting the application scenarios of the load switch.

[0003] In the load switch with the existing structure, the conductor of the shunt arranged outside the insulating housing and the conductor of the moving contact assembly inside the insulating housing are not arranged in a U shape, and no current flowing in the opposite direction is formed, so that no compensating force for increasing the contact pressure between the moving contact and the static contact can be generated. When the load switch is under large current, the Holm force repels the contact and burns it out.

[0004] In the load switch with the existing structure, the shunt sampling wire, the load switch control wire, or the signal wire of the zero-sequence current transformer are mostly connected by flexible wires. Such a connection method reduces the anti-interference ability of the load switch in a complex electronic environment and limits the use environment of the load switch.

[0005] With the development of smart electricity meters and the improvement of technical requirements, there is an urgent need to design a load switch with a small volume, strong current-carrying capacity, high withstand current, rich signal acquisition and sensing, and strong anti-interference ability. Summary of the Invention

[0006] Based on the above background, the present invention provides an electrical load switch, which ensures technical indicators such as the contact opening distance of the load switch, and while limitedly increasing the height dimension of the load switch, greatly reduces the horizontal dimension and installation area of the load switch.

[0007] The present application discloses an electrical load switch, which at least includes an insulating housing and internal components. The insulating housing is provided with a cover plate, and the internal components at least include a moving contact assembly, a static contact assembly, a motor, a transmission gear set, a connecting rod or a connecting piece. An installation plate or a partition is provided in the middle of the insulating housing, and the installation plate or the partition divides the insulating housing into an upper layer and a lower layer. The internal components are arranged on the installation plate or / and the insulating housing, part of the internal components are arranged in the upper layer, and part of the internal components are arranged in the lower layer.

[0008] In the above embodiment, the load switch divides the insulating housing into an upper layer and a lower layer through an installation plate or a partition, and part of the internal components are arranged in the upper layer, and part of the internal components are arranged in the lower layer. Such an arrangement ensures technical indicators such as the contact opening distance of the load switch, and while limitedly increasing the height dimension of the load switch, it greatly reduces the horizontal dimension, surface area and volume of the load switch. It enables users of the power system to fully utilize the height dimension of the power system device to install the load switch in place, solves the problem that the existing technology products cannot be installed and used, meets the needs of users, and expands the application range of the load switch.

[0009] In some embodiments, the moving contact assembly and the static contact assembly are arranged in the upper layer, and the motor and the transmission gear set are arranged in the lower layer.

[0010] In the above embodiment, arranging the moving contact assembly and the static contact assembly in the upper layer and the motor and the transmission gear set in the lower layer is a preferred structure, which ensures technical indicators such as the contact opening distance of the load switch.

[0011] In some embodiments, the connecting rod or the connecting piece passes through the installation plate or the partition to directly or indirectly connect the transmission gear set and the moving contact assembly.

[0012] In the above embodiment, by passing through the installation plate or the partition to directly or indirectly connect the transmission gear set and the moving contact assembly, the connecting rod or the connecting piece realizes the connection of the functions of the components in the upper and lower layers, and the connecting rod or the connecting piece transmits the driving force output by the motor and the transmission gear set to the moving contact assembly.

[0013] In some embodiments, at least one hole or / and at least one shaft is / are provided on at least one side of the installation plate, and the moving contact assembly and the transmission gear set are installed on the hole or / and the shaft.

[0014] In the above embodiment, by providing at least one hole or / and at least one shaft on at least one side of the installation plate and installing the moving contact assembly and the transmission gear set on the hole or / and the shaft, it is a preferred structure, and this structure makes the installation of the moving contact assembly and the transmission gear set convenient and reliable.

[0015] In some embodiments, the insulating housing is provided with a bottom plate, and at least one hole and / or at least one shaft are provided on the bottom plate and / or other positions of the insulating housing. The moving contact assembly and the transmission gear set are installed on the hole and / or the shaft.

[0016] In the above embodiments, at least one hole and / or at least one shaft are provided on the bottom plate and / or other positions of the insulating housing, and the moving contact assembly and the transmission gear set are installed on the hole and / or the shaft. This is a preferred structure, which makes the installation of the moving contact assembly and the transmission gear set convenient and reliable.

[0017] In some embodiments, the partition is arranged between the moving contact assembly and the motor and / or the transmission gear set.

[0018] In the above embodiments, the partition is arranged between the moving contact assembly and the motor and / or the transmission gear set, separating the moving contact assembly from the motor and / or the transmission gear set, ensuring the insulation performance of the load switch, and making the load switch safe and reliable.

[0019] In some embodiments, the moving contact assembly at least includes a first alloy contact, a flexible wire and / or a rigid wire, a moving contact lead terminal, and a driving force input point. The moving contact lead terminal is of an integral structure, or the moving contact lead terminal is formed by connecting two or more parts.

[0020] In the above embodiments, the moving contact assembly at least includes a first alloy contact, a flexible wire and / or a rigid wire, a moving contact lead terminal, and a driving force input point. The moving contact lead terminal is of an integral structure, or the moving contact lead terminal is formed by connecting two or more parts. The first alloy contact of the moving contact assembly cooperates with the second alloy contact in the static contact assembly to form reliable breaking and conduction. The flexible wire and / or the rigid wire are used to connect and conduct the first alloy contact and the moving contact lead terminal to ensure the flow of large current. The driving force input point is connected to a connecting rod or a connecting piece, and the driving force of the driving mechanism is received through the connecting rod or the connecting piece, causing the moving contact assembly to swing and completing the breaking and closing operations of the load switch. A shunt or / and other terminals can be connected to the outside of the moving contact lead terminal to form a moving contact lead terminal composed of two or more parts connected together.

[0021] In some embodiments, the moving contact lead terminal is fixedly installed on the insulating housing, and one end connected with the flexible wire and / or the rigid wire is inside the insulating housing, and the other end extends outward to form a first outgoing line end.

[0022] In the above embodiments, the moving contact lead terminal is fixedly installed on the insulating housing, and one end with the flexible wire and / or the rigid wire is inside the insulating housing and is connected to the first alloy contact through the flexible wire and / or the rigid wire. The other end extends outward to form a first outgoing line end for external wiring.

[0023] In some embodiments, one end of the flexible wire is connected to the moving contact lead-out terminal, and the other end is connected to the first alloy contact to form a flexible wire connection assembly.

[0024] In the above embodiments, one end of the flexible wire is connected to the moving contact lead-out terminal, and the other end is connected to the tail of the first alloy contact to form a flexible wire connection assembly. The flexible wire connection assembly has a certain flexibility and generates less stress when deformed. When the moving contact is driven by a driving force, the flexible wire connection assembly will deform under the action of a small force, so that the moving contact assembly can generate a large swing amount under a small driving force, ensuring the requirement of a large opening distance of ≥5.5 mm between the contacts.

[0025] In some embodiments, the rigid wire is connected to the tail of the first alloy contact and forms a rigid-flexible wire assembly together with the flexible wire.

[0026] In the above embodiments, the flexible wire connection ensures that the moving contact assembly can reach the requirement of a contact opening distance of ≥5.5 mm under a small driving force. The rigid wire is connected to the tail of the first alloy contact, increasing the connection area of the tail of the first alloy contact and facilitating the connection of multiple flexible wires to the rigid wire. The arrangement of multiple flexible wires can increase the cross-sectional area of the conductor. The multiple dispersed flexible wires reduce the influence of the deformation stress of the flexible wire on the movement of the moving contact assembly, ensuring the requirement of a large contact opening distance and the ability to conduct large currents.

[0027] In some embodiments, the moving contact lead-out terminal disposed outside the insulating housing is disposed close to the outer wall of the insulating housing and is arranged in a direction opposite to the current of the flexible wire and / or rigid wire of the moving contact assembly disposed inside the insulating housing. The moving contact lead-out terminal and the moving contact assembly are isolated by the insulating housing.

[0028] In the above embodiments, the moving contact lead-out terminal disposed outside the insulating housing is disposed close to the outer wall of the insulating housing and is arranged in a direction opposite to the current of the flexible wire and / or rigid wire of the moving contact assembly disposed inside the insulating housing. The moving contact lead-out terminal and the moving contact assembly are isolated by the outer wall of the insulating housing. When current flows through, the current directions of the moving contact lead-out terminal, the moving contact assembly, or the flexible and / or rigid wires are opposite. The moving contact lead-out terminal, the moving contact assembly, or the flexible and / or rigid wires generate an induced magnetic field. In the magnetic field, an Ampere force is generated between the moving contact lead-out terminal and the moving contact assembly. This Ampere force increases as the current value flowing through the moving contact increases and is applied to the first alloy contact of the moving contact assembly to become the contact pressure, providing a beneficial compensation for the contact pressure.

[0029] In some embodiments, the static contact assembly at least includes a second alloy contact, a static contact plate, and a static contact terminal. The second alloy contact, the static contact plate, and the static contact terminal are of an integral structure or are formed by connecting two or more parts, and a second outgoing line end is formed through the static contact assembly.

[0030] In the above embodiments, the static contact assembly at least includes a second alloy contact, a static contact plate, and a static contact terminal. The second alloy contact is welded, riveted, or integrally provided on the static contact plate. The static contact plate and the static contact terminal are of an integral structure or are formed by connecting two or more parts, and are fixedly installed inside the insulating housing. The static contact plate extends outward to the outside of the insulating housing to form a second outgoing line end for external wiring use.

[0031] In some embodiments, the transmission gear set includes a turbine, a worm, a cylindrical gear, a sector gear, a driving turntable, and a rotating shaft.

[0032] In the above embodiments, the transmission gear set includes a turbine, a worm, a cylindrical gear, a sector gear, a driving turntable, and a rotating shaft. The motor drives the worm and the turbine to rotate to form a first-stage speed reduction. The turbine drives the cylindrical gear to rotate, and the cylindrical gear drives the sector gear to rotate to form a second-stage speed reduction effect. At the same time, the sector gear pushes the driving turntable to rotate, and when the driving turntable pushes the moving contact assembly to reach the closing or opening stop position through a connecting rod or a connecting piece, the sector gear disengages from the cylindrical gear, causing the cylindrical gear to rotate idly and preventing the motor from being blocked.

[0033] In some embodiments, the transmission gear set pushes the driving turntable to rotate. A driving hole or a driving shaft is provided on the circumference of the driving turntable. The driving hole or the driving shaft is connected to the driving force input point of the moving contact assembly by a connecting rod or a connecting piece, and drives the moving contact assembly to rotate or swing.

[0034] In the above embodiments, the driving turntable is pushed by the transmission gear set to rotate. A driving hole or a driving shaft is provided on the circumference of the driving turntable. The driving hole or the driving shaft is connected to one end of a connecting rod or a connecting piece, and the other end of the connecting rod or the connecting piece is connected to the driving force input point of the moving contact assembly. Through the transmission of the connecting rod or the connecting piece, the rotation of the driving turntable will drive the moving contact assembly to rotate or swing.

[0035] In some embodiments, the driving force input point is connected to the driving hole or the driving shaft provided on the circumference of the driving turntable by a connecting rod or a connecting piece.

[0036] In the above embodiments, a driving force input point is provided on the moving contact assembly. The driving force input point is connected to one end of a connecting rod or a connecting piece, and the other end of the connecting rod or the connecting piece is connected to the driving hole or the driving shaft provided on the circumference of the driving turntable. The driving force input point provided on the moving contact assembly receives the driving force and the driving displacement output by the driving turntable through the connecting rod or the connecting piece, causing the moving contact assembly to rotate or swing.

[0037] In some embodiments, the moving contact lead terminal is disposed at any position of the insulating housing, and the lead end of the moving contact lead terminal leads out in any direction.

[0038] In the above embodiments, according to the use environment and the different arrangement modes when the load switch is applied, for the convenience of use and connection of external conductive parts, the moving contact lead terminals can be disposed at different positions of the insulating housing, and the lead-out directions of the moving contact lead terminals can lead out in different directions.

[0039] In some embodiments, a shunt or / and zero-sequence current transformer are provided at the first outgoing terminal and the second outgoing terminal.

[0040] In the above embodiments, the shunt can be connected in series with the moving contact lead terminal to form the first outgoing terminal. The shunt can sample the current values passing through the first outgoing terminal and the second outgoing terminal for the mechanism where the load switch is located. The shunt can also be connected in series with the static contact plate to form the second outgoing terminal. The shunt can sample the current values passing through the first outgoing terminal and the second outgoing terminal for the mechanism where the load switch is located.

[0041] In some embodiments, the sampling lead wire of the shunt, the control wire of the load switch, and the electrical signal wire of the zero-sequence current transformer all adopt the form of PCB lead terminals.

[0042] In the above embodiments, the sampling lead wire of the shunt, the control wire of the load switch, and the electrical signal wire of the zero-sequence current transformer are all connected through the form of PCB board lead terminals. Since the shunt sampling, the control wire of the load switch, and the electrical signals of the zero-sequence current transformer are all small currents and the required conductive cross-sectional area is not large, the lead-out end adopting the form of PCB lead terminals can be transmitted by PCB wiring, avoiding excessive lead wires introducing greater impedance, improving the anti-interference ability of the load switch in a complex electronic environment, and ensuring the reliability of the work.

[0043] In some embodiments, the zero-sequence current transformer provided at the second outgoing terminal is disposed above the N-line incoming terminal or the N-line outgoing terminal of the mechanism where it is located.

[0044] In the above embodiments, since the width dimension of the load switch in the embodiments of the present disclosure is small, when the load switch is longitudinally arranged in the application mechanism where it is located, there will be space above the N-line incoming terminal where the zero-sequence current transformer can be disposed, so that the zero-sequence current transformer can be disposed above the N-line incoming terminal or the N-line outgoing terminal, which can more conveniently arrange the components and wires of the mechanism where the load switch is located.

[0045] The beneficial effects of the present invention are as follows:

[0046] 1. By arranging the motor and the transmission gear set inside the lower layer of the insulating housing, and arranging the moving contact assembly and the static contact assembly inside the upper layer of the insulating housing, and the motor and the transmission gear set are horizontally arranged along the radial direction (Y direction) of the rotating shaft, and the moving contact assembly and the static contact assembly are arranged above or below the transmission gear set in the axial direction of the rotating shaft. Such an arrangement ensures technical indicators such as the contact opening distance of the load switch, and while limitedly increasing the height dimension of the load switch, it greatly reduces the horizontal dimension, surface area and volume of the load switch. It enables users of the power system to fully utilize the height dimension of the power system device to install the load switch in place, solves the problem that the existing technology products cannot be installed and used, meets the needs of users, and expands the application range of the load switch.

[0047] 2. The layered stacking arrangement avoids the mutual interference between the driving component and the contact component, effectively increases the laying space for the flexible wire and the rigid wire. In this way, it is convenient to increase the cross-sectional area of the flexible wire and the rigid wire while avoiding excessive reaction force on the driving system caused by stress deformation of the flexible wire and / or the rigid wire. Increasing the cross-sectional area of the flexible wire and / or the rigid wire can improve the current passing ability, reduce heat generation, reduce the temperature rise of the terminal, improve the long-term working reliability, expand the application range of the load switch, and meet the user's usage requirements.

[0048] 3. The layered stacking arrangement avoids the mutual interference between the driving component and the contact component. In addition, the moving contact lead terminal is connected to the moving contact assembly by a flexible wire and / or a rigid wire, making the installation position, lead-out position and direction of the moving contact lead terminal more flexible. The moving contact lead terminal can be more conveniently connected to the external mechanism by adopting different lead-out methods, lead-out positions and lead-out directions, which is convenient for users to use.

[0049] 4. The moving contact lead terminal outside the insulating housing and the moving contact assembly and / or the flexible wire and / or the rigid wire inside the insulating housing are arranged in a U shape. The current flowing through the moving contact lead terminal is opposite to that flowing through the moving contact assembly and / or the flexible wire and / or the rigid wire inside the insulating housing, so that an Ampere force is generated when passing through the current and applied to the contact, increasing the contact pressure and becoming the compensation of the contact pressure. Such a structure provides a greater contact pressure compensation without increasing the cost, prevents the contact from being repelled by the Holm force during high current and burning out the switch, increases the conduction reliability of the load switch and the high current overload capacity.

[0050] 5. The magnetic yoke arranged on the static contact assembly cooperates with the armature arranged on the moving contact assembly to generate suction force during high current, increasing the pressure between the contacts and becoming the compensation of the contact pressure, preventing the contact from being repelled by the Holm force during high current and burning out the switch, increasing the conduction reliability of the load switch and the high current overload capacity.

[0051] 6. The shunt sampling line, the motor control line, and the electrical signal line of the zero-sequence current transformer are all designed in the form of PCB lead-out terminals and transmitted through the PCB board. By taking advantage of the highly integrated electronic devices and the precise circuit design of the PCB board, the stability of the switch transmission signal is improved, and the anti-interference performance of the load switch in a complex electromagnetic environment is also enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0053] Figure 1 is a schematic structural diagram of a load switch in the prior art;

[0054] Figure 2 is a schematic structural diagram of the electrical load switch disclosed in Embodiment 1;

[0055] Figure 3 is a schematic structural diagram of the electrical load switch disclosed in Embodiment 1 from another perspective;

[0056] Figure 4 is a schematic structural diagram of the electrical load switch disclosed in Embodiment 1 from other perspectives;

[0057] Figure 5 is a schematic external view of the electrical load switch disclosed in Embodiment 1;

[0058] Figure 6 is a schematic internal structure diagram of the electrical load switch disclosed in Embodiment 1;

[0059] Figure 7 is a schematic diagram of the upper mounting holes or shaft structure on the mounting plate of the electrical load switch disclosed in Embodiment 1;

[0060] Figure 8 is a schematic diagram of the mounting holes or shaft structure of the cover plate of the electrical load switch disclosed in Embodiment 1;

[0061] Figure 9 is a schematic diagram of the lower mounting holes or shaft structure on the mounting plate of the electrical load switch disclosed in Embodiment 1;

[0062] Figure 10 is a schematic diagram of the mounting holes or shaft structure of the lower bottom plate of the electrical load switch disclosed in Embodiment 1;

[0063] Figure 11Schematic diagram of the moving contact assembly of the electric load switch disclosed in Embodiment 1;

[0064] Figure 12 Schematic diagram of the static contact assembly of the electric load switch disclosed in Embodiment 1;

[0065] Figure 13 Schematic diagram of the lead-out method of the first outgoing line terminal of the electric load switch disclosed in Embodiment 1;

[0066] Figure 14 Another schematic diagram of the lead-out method of the first outgoing line terminal of the electric load switch disclosed in Embodiment 1;

[0067] Figure 15 Schematic diagram of the connection between the moving contact lead-out terminal, the moving contact assembly and the wire disclosed in Embodiment 1;

[0068] Figure 16 Another schematic diagram of the connection between the moving contact lead-out terminal, the moving contact assembly and the wire disclosed in Embodiment 1;

[0069] Figure 17 Schematic diagram of the structure of the moving contact lead-out terminal including a shunt disclosed in Embodiment 1;

[0070] Figure 18 Schematic diagram of the structure of the zero-sequence current transformer of the electric load switch disclosed in Embodiment 1;

[0071] Figure 19 Schematic diagram of the combined structure of the shunt and the zero-sequence current transformer of the electric load switch disclosed in Embodiment 1;

[0072] Figure 20 Schematic diagram of another combined structure of the shunt and the zero-sequence current transformer of the electric load switch disclosed in Embodiment 1;

[0073] Figure 21 Schematic diagram of another combined structure of the shunt and the zero-sequence current transformer of the electric load switch disclosed in Embodiment 1;

[0074] Figure 22 Schematic diagram of another combined structure of the shunt and the zero-sequence current transformer of the electric load switch disclosed in Embodiment 1;

[0075] Figure 23 Schematic diagram of another combined structure of the shunt and the zero-sequence current transformer of the electric load switch disclosed in Embodiment 1;

[0076] Figure 24 Schematic diagram of the structure of the electric load switch disclosed in Embodiment 2;

[0077] Figure 25Schematic diagram of the structure with a partition arranged on the insulating housing in the electric load switch disclosed in the second embodiment;

[0078] Figure 26 Schematic diagram of the structure of the cover plate in the electric load switch disclosed in the second embodiment. Detailed implementation manners

[0079] To make the purpose, technical solutions and advantages of the implementation of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The described embodiments are some, but not all, of the embodiments of the present invention.

[0080] The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0081] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0082] In the load switch of the prior art, as Figure 1 shown, it includes a DC motor 4, a turbine gear set 6, a moving contact 91, and a stationary contact 31. In this solution of the switching device, the DC motor 4, the turbine gear set 6, the moving contact 91, and the stationary contact 31 are arranged in the radial Y direction of the gear rotating shaft. The main defect of this solution is that the load switch has a large size and a large surface area in the Y direction, which limits the application range of the load switch.

[0083] Embodiment 1:

[0084] To solve the problems existing in the above-mentioned prior load switch, as Figures 2 to 5As shown, this embodiment provides an electrical load switch, which includes an insulating housing 100 and internal components. The insulating housing 100 is provided with a bottom plate 1001 and a cover plate 1002. The internal components at least include a moving contact assembly 200, a static contact assembly 300, a motor 400, a transmission gear set 500, and a connecting rod 600. A mounting plate 1003 is provided in the middle of the insulating housing 100. The mounting plate 1003 and the insulating housing 100 form a lower layer 1005 and an upper layer 1006, and the internal components are respectively arranged in the lower layer 1005 and the upper layer 1006. The moving contact assembly 200, the static contact assembly 300, the motor 400, the transmission gear set 500, and the connecting rod 600 are combined and arranged in the housing in a certain manner. Such a combination method can greatly reduce the width Y-direction dimension of the load switch while limitedly increasing the height Z-direction dimension of the load switch. In this embodiment, the electrical load switch only includes one moving contact assembly 200 and one static contact assembly 300, which is merely exemplary. In other embodiments, it can also be applied to other types of load switches including, for example, two moving contact assemblies, two static contact assemblies, or three moving contact assemblies, three static contact assemblies, etc.

[0085] Preferably, the moving contact assembly 200 and the static contact assembly 300 are arranged in the upper layer 1006, and the motor 400 and the transmission gear set 500 are arranged in the lower layer 1005. By arranging the contact system composed of the moving contact assembly 200 and the static contact assembly 300 in the upper layer 1006 of the insulating housing, and arranging the driving mechanism composed of the motor 400 and the transmission gear set 500 as a group in the lower layer 1005, the motor and the transmission gear set are horizontally arranged along the radial direction (Y-direction) of the rotation axis, and the moving contact assembly 200 and the static contact assembly 300 are arranged above or below the axial gear set of the gear shaft. It avoids the mutual interference between the driving mechanism and the contact assembly, ensures technical indicators such as the contact opening distance of the load switch, and greatly reduces the product size and installation area of the load switch while limitedly increasing the height dimension of the load switch.

[0086] Such as Figures 4 to 6As shown in the figure, in this embodiment, the electric load switch is connected by a connecting rod 600. The main body of the connecting rod 600 is arranged in the upper layer 1006 where the moving contact assembly 200 is located. One end is connected to the driving force input point 2004 set on the moving contact assembly 200, and extends to the lower layer 1005 through a through groove opened on the mounting plate 1003 in the middle of the insulating housing 100 and is connected to the driving hole 50051 set on the driving disc 5005. In other embodiments, the main body of the connecting rod 600 can also be placed in the lower layer 1005 where the transmission gear set 500 is located, or can be arranged in two communicating cavities. Preferably, the connecting rod 600 can also be a connecting plate structure, with connecting holes respectively arranged at both ends of the connecting plate, and the connecting holes are respectively connected to the driving hole 50051 set on the driving disc 5005 and the driving force input shaft set on the moving contact assembly 200. The driving force output by the motor 400 and the transmission gear set 500 is transmitted to the moving contact assembly 200 through the connecting rod 600 or the connecting plate, and the connecting rod 600 or the connecting plate realizes the connection of the functions of the components in the upper and lower layers.

[0087] As Figure 4 , Figure 7 , Figure 8 As shown in the figure, the insulating housing 100, its mounting plate 1003, bottom plate 1001 or cover plate 1002 are used as support members. In the structures of the moving contact assembly 200 and the static contact assembly 300 disclosed in this embodiment, the moving contact assembly 200 and the static contact assembly 300 are set as a group on the mounting plate 1003 and the cover plate 1002, and a plurality of mounting holes or shafts are provided on the mounting plate 1003 and the cover plate 1002. In this embodiment, there are a plurality of mounting holes or shafts, and the mounting holes or shafts 1007, mounting holes or shafts 1008, mounting holes or shafts 1009, mounting holes or shafts 1010 shown in the figure are all mounting structural members. Preferably, the moving contact assembly 200 and the static contact assembly 300 can also be set together or separately on the mounting plate 1003 and the cover plate 1002. In other embodiments, the moving contact assembly 200 and the static contact assembly 300 are set as a group on the mounting plate 1003 and the bottom plate 1001, and a plurality of mounting structural members are provided on the mounting plate 1003 and the bottom plate 1001.

[0088] As Figure 3 , Figure 9 , Figure 10As shown, in the structure of the schematic diagram of the fixed connection of the motor 400 and the transmission gear set 500 disclosed in this embodiment, the mounting plate 1003 and the bottom plate 1001 are used as support members. The motor 400 and the transmission gear set 500 are arranged as a group on the mounting plate 1003 and the bottom plate 1001, and a plurality of second mounting holes or shafts are provided on the mounting plate 1003 and the bottom plate 1001. In this embodiment, there are also a plurality of second mounting holes or shafts. The mounting holes or shafts 1004, 1011, 1012, 1013, 1014, and 1015 shown in the figure are all second mounting structural members. In other embodiments, the motor 400 and the transmission gear set 500 are arranged as a group on the mounting plate 1003 and the cover plate 1002, and a plurality of second mounting holes or shafts are provided on the mounting plate 1003 and the cover plate 1002. Preferably, the motor 400, the control terminal 4001 connected to the motor 400, and the transmission gear set 500 can also be arranged together or separately on the mounting plate 1003 or / and the cover plate 1002.

[0089] As Figure 11 shown, in this embodiment, the moving contact assembly 200 includes a first alloy contact 2001, a flexible wire 2002, a rigid wire 2007, a moving contact lead-out terminal 2003, and a driving force input point 2004. The first alloy contact 2001 of the moving contact assembly 200 cooperates with the second alloy contact 3001 in the static contact assembly 300 to form reliable breaking and conduction. The moving contact lead-out terminal 2003 is of an integral structure. In other embodiments, the moving contact lead-out terminal 2003 can also be formed by connecting two or more parts. The flexible wire 2002 and the rigid wire 2007 are used to connect and conduct the first alloy contact 2001 and the moving contact lead-out terminal 2003 to ensure the flow of large current. The driving force input point 2004 is connected to the connecting rod 600 or the connecting piece, and the driving force of the driving mechanism is received through the connecting rod 600 or the connecting piece, so that the moving contact assembly 200 swings to complete the breaking and closing operations of the load switch. A shunt or other terminals can be connected to the outside of the moving contact lead-out terminal 2003 to form a moving contact lead-out terminal composed of two or more parts connected. In this embodiment, a rigid wire 2007 and an armature 2006 are stacked at the contact part. The setting of the rigid wire 2007 increases the connection area between the flexible wire 2002 and the rigid wire 2007, facilitating the dispersed connection of multiple flexible wires. The armature 2006 can cooperate with the magnetic yoke 3005 provided in the static contact assembly 300 to generate suction force to compensate the contact pressure and overcome the Holm force under large current. Preferably, the moving contact lead-out terminal 2003 is fixedly installed on the insulating housing 100, and one end connected with the flexible wire 2002 and the rigid wire 2007 is inside the insulating housing 100, and the other end extends outward to connect to a shunt to form a first outgoing line end 2005 composed of multiple parts.

[0090] AsFigure 12 As shown in the figure, the static contact assembly 300 includes a second alloy contact 3001, a static contact plate 3002, and a static contact terminal 3003. The second alloy contact 3001 and the static contact plate 3002 are formed by connecting two or more parts to form a second outgoing terminal 3004. In this embodiment, the static contact assembly 300 adopts an integral terminal, and the provided yoke 3005 cooperates with the armature 2006 provided in the moving contact assembly 200 to generate a suction force to compensate the contact pressure at high current, overcoming the Holm force. In other embodiments, the second alloy contact 3001 and the static contact plate 3002 may also be of a split structure, formed by connecting two or more parts. The second alloy contact 3001 of the static contact assembly 300 cooperates with the first alloy contact 2001 in the moving contact assembly 200 to form reliable breaking and conduction. The second alloy contact 3001 of the static contact assembly 300 is fixed inside the insulating housing 100 by welding or riveting or integrally setting with the static contact plate 3002. The static contact plate 3002 extends outward to the outside of the insulating housing 100 to form an integral static contact terminal 3003 for external wiring. In other embodiments, the static contact terminal 3003 may also be connected to the static contact plate 3002 for external wiring.

[0091] In this embodiment, one end of the flexible wire 2002 is connected to the moving contact outgoing terminal 2003, and the other end is connected to the first alloy contact 2001 to form a flexible wire connection assembly. One end of the flexible wire 2002 is connected to the moving contact outgoing terminal 2003, and the other end is connected to the tail of the first alloy contact 2001 to form a flexible wire connection assembly connection. The flexible wire connection assembly has a certain flexibility and generates less stress when deformed. When the moving contact assembly 200 is driven by a driving force, the flexible wire connection assembly will deform under the action of a small force, so that the moving contact assembly 200 can generate a large swing amount under a small driving force, ensuring the requirement of a large opening distance of ≥5.5 mm between the contacts. In addition, the flexible wire connected to the tail of the contact reduces the influence of conductor heating on the contact pressure of the moving contact assembly.

[0092] In this embodiment, the rigid wire 2007 is connected to the tail of the first alloy contact 2001 and forms a rigid and flexible wire assembly together with the flexible wire 2002. In the above embodiment, the connection of the flexible wire 2002 ensures that the moving contact assembly meets the requirement of a contact opening distance of ≥5.5 mm under a small driving force. The rigid wire 2007 is connected to the tail of the first alloy contact 2001, increasing the connection area of the tail of the first alloy contact 2001, facilitating the connection of multiple flexible wires 2002 to the rigid wire. The setting of multiple flexible wires 2002 can increase the cross-sectional area of the conductor. The multiple dispersed flexible wires reduce the influence of the deformation stress of the flexible wire 2002 on the movement of the moving contact assembly 200, ensuring the requirement of a large contact opening distance and the ability to pass a large current.

[0093] In this embodiment, please refer to Figure 3 , the transmission gear set 500 includes a turbine 5001, a worm 5002, a cylindrical gear 5003, a sector gear 5004, a driving turntable 5005, and a rotating shaft 5006. In other embodiments, the transmission gear set 500 can also adopt various deceleration methods such as bevel gears, face gears, and multi-stage reduction gears. The driving turntable 5005 can also adopt a gear structure or a semi-circular structure. In this embodiment, please refer to Figure 6 , a driving hole 50051 is provided on the circumference of the driving turntable 5005, and the driving hole 50051 is connected to the driving force input point 2004 of the moving contact assembly 200 by a connecting rod 600, and drives the moving contact assembly 200 to rotate or swing. Specifically, in this embodiment, the motor 400 drives the worm 5002 and the turbine 5001 to rotate to form a first-stage deceleration, the turbine 5001 drives the cylindrical gear 5003 to rotate, and the cylindrical gear 5003 drives the sector gear 5004 to rotate to form a second-stage deceleration effect. At the same time, the sector gear 5004 pushes the driving turntable 5005 to rotate, and when the driving turntable 5005 pushes the moving contact assembly 200 to reach the closing or opening stop position through the connecting rod 600 or the connecting piece, the sector gear 5004 disengages from the cylindrical gear 5003, causing the cylindrical gear 5003 to rotate idly and preventing the motor 400 from being blocked.

[0094] In this embodiment, the moving contact assembly 200 is provided with a driving force input point 2004, and the driving force input point 2004 is connected to the driving hole 50051 provided on the circumference of the driving turntable 5005 by a connecting rod 600. In this embodiment, the driving force input point 2004 provided on the moving contact assembly 200 receives the driving force and driving displacement output by the driving turntable 5005 through the connecting rod 600 or the connecting piece, causing the moving contact assembly 200 to rotate or swing.

[0095] As Figure 4 , Figure 13 , Figure 14 shown, the moving contact lead terminal 2005 can be set at any position of the insulating housing 100, and the lead-out end of the moving contact lead terminal 2003 leads out in any direction, thereby making the application installation and wiring more convenient. The installation position, lead-out position, and lead-out direction of the moving contact lead terminal 2003 are not limited to those shown in the illustrated embodiment, and there can be more forms.

[0096] In this embodiment, as Figure 15 shown, the shunt 700 is connected to the moving contact lead terminal 2003 to form the first outgoing line end 2005, and the shunt 700 is placed on one side of the load switch. The shunt 700 is connected in series with the moving contact lead terminal 2003 to form the first outgoing line end 2005. As Figure 16As shown, the shape of the shunt 700 can also be set to other styles, as long as the current direction of the shunt 700 is opposite to that of the flexible wire 2002 of the moving contact assembly 200 inside the load switch. In this embodiment, the sampling lead-out wire of the shunt 700, the load switch control wire, and the electrical signal wire of the zero-sequence current transformer 800 all adopt the form of PCB lead-out terminals. The use of PCB lead-out terminals for the lead-out ends enables the device to use PCB wiring for transmission, avoiding excessive lead-out wires introducing greater impedance, improving the anti-interference ability of the load switch in a complex electronic environment, and ensuring the reliability of operation. As Figure 18 shown, it is a schematic structural diagram of the zero-sequence current transformer 800. In this embodiment, the zero-sequence current transformer 800 obtains signals through two signal lead pins 8001.

[0097] As Figures 19 to 23 shown, the shunt 700 samples the current values passing through the first outgoing terminal 2005 and the second outgoing terminal 3003 for the mechanism where the load switch is located. The second outgoing terminal 3003 passes through the central hole of the zero-sequence current transformer 800 and forms a zero-sequence sampling circuit with the zero-sequence sampling wire 900 passing through the central hole of the zero-sequence current transformer 800 in the mechanism where the load switch is located, and is placed on the other side of the load switch. The positions of the shunt 700 and the zero-sequence current transformer 800 are not limited to those shown in the figure and can be set on the same side or the opposite side, the upper side or / and the lower side or / and the left side or / and the right side of the load switch according to the requirements of the mechanism where the load switch is located. In other embodiments, the shunt 700 can also be connected in series to the static contact plate 3002 to form the second outgoing terminal 3004. It is also possible that the first outgoing terminal 2005 passes through the central hole of the zero-sequence current transformer 800. An insulating layer should be provided between the second outgoing terminal 3003 and the zero-sequence sampling wire 900. In As Figures 19 to 23 shown, it shows that the zero-sequence current transformer 800 according to an embodiment of the present disclosure is arranged above the N-line incoming terminal or the N-line outgoing terminal of the mechanism where it is located. In the figure, the zero-sequence current transformer 800 is arranged above the N-line incoming terminal or the N-line outgoing terminal, which can make it more convenient for wiring. The electrical signals of the shunt 700 and the zero-sequence current transformer 800 are both transmitted through the PCB board. Utilizing the advantages of high integration of electronic devices and the precise circuit design of the PCB board, while improving the signal transmission stability of the switch, it also increases the anti-interference performance of the load switch applied in a complex electromagnetic environment.

[0098] Embodiment 2:

[0099] As Figure 24 、 2526, the main difference between this embodiment and the first embodiment is that the bottom plate 1001 and the insulating housing 100 are an integral structure, the mounting plate 1003 is replaced by a partition 1016, that is, the partition 1016 divides the space in the insulating housing 100 into an upper layer and a lower layer, the partition 1016 is not provided with a mounting hole or a shaft, and the partition 1016 is fixed by an undercut 1017 on the insulating housing 100. The mounting structure 1009 originally on the mounting plate 1003 is arranged on the right side wall of the insulating housing 100, and the mounting structure 1011, 1012, 1013 are arranged on the cover plate 1002. The rest is basically the same as the first embodiment.

[0100] The present invention can be realized in other specific forms without departing from its spirit and essential characteristics. The current embodiment is considered to be exemplary and not restrictive in all aspects, and the scope of the present invention is defined by the appended claims rather than the above description, and all changes falling within the meaning of the claims and the scope of equivalents are thus included in the scope of the present invention.

Claims

1. An electric load switch, comprising at least an insulating shell and internal components, wherein the insulating shell is provided with a cover plate, and the internal components are provided with at least a moving contact assembly, a static contact assembly, a motor, a transmission gear set, a connecting rod or a connecting piece; a mounting plate or a partition is provided in the middle of the insulating shell, and the mounting plate or the partition separates the insulating shell into an upper layer and a lower layer, and the internal components are arranged on the mounting plate and / or the insulating shell, part of the internal components are arranged on the upper layer, and part of the internal components are arranged on the lower layer.

2. The electrical load switch according to claim 1, characterized in that: The moving contact assembly and the stationary contact assembly are arranged in the upper layer, and the electric motor and the transmission gear set are arranged in the lower layer.

3. The electrical load switch according to claim 1, characterized in that: The connecting rod or connecting piece passes through a mounting plate or a partition plate to directly or indirectly connect the transmission gear set and the moving contact assembly.

4. The electrical load switch according to claim 1, characterized in that: At least one side of the mounting plate is provided with at least one hole and / or at least one shaft, and the moving contact assembly and the transmission gear set are mounted on the hole and / or the shaft.

5. The electrical load switch according to claim 1, characterized in that: The insulating housing is provided with a bottom plate, and at least one hole and / or at least one shaft are provided on the bottom plate and / or other positions of the insulating housing, and the moving contact assembly and the transmission gear set are mounted on the hole and / or the shaft.

6. The electrical load switch according to claim 1 or 4, characterized in that: The partition is arranged between the moving contact assembly and the motor and / or the transmission gear set.

7. The electrical load switch according to claim 1, characterized in that: The moving contact assembly at least includes a first alloy contact, a soft wire or / and a hard wire, a moving contact lead-out terminal, and a driving force input point. The moving contact lead-out terminal is an integrated structure, or the moving contact lead-out terminal is formed by connecting two or more parts.

8. The electrical load switch according to claim 7, characterized in that: The movable contact lead-out terminal is fixedly mounted on the insulating housing, one end of which is connected to a soft wire or / and a hard wire is inside the insulating housing, and the other end extends outward to form a first lead-out terminal.

9. The electrical load switch according to claim 7, characterized in that: One end of the soft wire is connected to the moving contact lead-out terminal, and the other end is connected to the first alloy contact to form a soft wire connection assembly.

10. The electrical load switch according to claim 8, characterized in that: The hard wire is connected to the tail of the first alloy contact and forms a soft-hard wire assembly together with the soft wire.

11. The electrical load switch according to claim 7, characterized in that: The moving contact lead-out terminal arranged outside the insulating shell is arranged close to the outer wall of the insulating shell, and is arranged in the opposite direction of current to the soft wire and / or hard wire of the moving contact assembly arranged inside the insulating shell. The moving contact lead-out terminal and the moving contact assembly are isolated by the insulating shell.

12. The electrical load switch according to claim 8, characterized in that: The stationary contact assembly at least includes a second alloy contact, a stationary contact plate and a stationary contact terminal. The second alloy contact, the stationary contact plate and the stationary contact terminal are an integrated structure or are formed by connecting two or more parts, and a second outlet terminal is formed by the stationary contact assembly.

13. The electrical load switch according to claim 1, characterized in that: The transmission gear set includes a turbine, a worm, a cylindrical gear, a fan gear, a driving turntable, and a rotating shaft.

14. The electrical load switch according to claim 13, characterized in that: The transmission gear set drives the driving turntable to rotate. A driving hole or a driving shaft is provided on the circumference of the driving turntable. The driving hole or the driving shaft is connected to the driving force input point of the moving contact assembly by a connecting rod or a connecting piece, and drives the moving contact assembly to rotate or swing.

15. The electrical load switch according to claim 7, characterized in that: The driving force input point is connected with a driving hole or a driving shaft arranged on the circumference of the driving rotating disk by a connecting rod or a connecting piece.

16. The electrical load switch according to claim 7, characterized in that: The movable contact lead-out terminal is arranged at any position of the insulating housing, and the lead-out end of the movable contact lead-out terminal is led out in any direction.

17. The electrical load switch according to claim 12, characterized in that: The first outgoing terminal and the second outgoing terminal are provided with a shunt and / or a zero-sequence mutual inductor.

18. The electrical load switch according to claim 17, characterized in that: The sampling lead wire of the shunt, the load switch control wire, and the electric signal wire of the zero-sequence transformer are all in the form of PCB lead terminals.

19. The electrical load switch according to claim 17, characterized in that: The zero-sequence mutual inductor arranged at the second outgoing line terminal is arranged above the N-line input terminal or above the N-line output terminal of the mechanism.

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