Electrical circuit board for manufacturing electrical control box, manufacturing process and electrical control box

Abstract

The invention provides an electrical circuit board for manufacturing an electrical control box, a manufacturing process and the electrical control box. The electrical circuit board for manufacturing the electrical control box comprises a device fixing plate, a circuit laying plate, a current-carrying wire and a conductive connecting piece, the first surface of the device fixing plate is used for arranging an electrical device; the first surface of the circuit laying plate is arranged on the second surface of the device fixing plate; the current-carrying wire is arranged on the second surface of the circuit laying board; and the conductive connecting piece penetrates through the device fixing plate and the circuit laying plate to fix the current-carrying wire on the second surface of the circuit laying plate and electrically connect the current-carrying wire to the electrical device, so that the product quality and the production efficiency of the electrical control box are effectively improved, and the product size and the labor cost are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of low-voltage electrical control equipment manufacturing, and in particular to an electrical circuit board used for manufacturing an electrical control box, a manufacturing process and an electrical control box. Background Art

[0002] Low-voltage electrical control equipment mainly refers to various control boxes (cabinets) and distribution boxes (cabinets) that we can usually access. They can complete the control and protection of the safe operation of various electrical equipment, as well as the distribution and protection of electrical energy for electrical circuits. They are collectively referred to as electric control boxes below. Electric control boxes are widely used, but their manufacturing process is relatively complicated. Due to the special process of the product, electric control boxes still rely on manual wiring to complete, and are almost the only product in today's industrial products that rely on manual labor to manufacture.

[0003] The traditional manufacturing process of the electric control box is: prepare electrical components according to the pre-designed electrical schematic diagram; design the electrical component layout of the electric control box; install electrical components on the component fixing plate of the electric control box according to the layout diagram; design the electrical circuit layout diagram according to the electrical schematic diagram and the layout diagram; make the corresponding electrical connection wires according to the electrical circuit layout diagram, and add terminal heads and terminal numbers; manually install each prepared electrical connection wire; comb the connected electrical connection wires, and beautify them by tying them into bundles or embedding them in the line trough; check whether the electrical connection is correct and test it with power on; install the completed component fixing plate into the shell of the electric control box and fix it firmly; thus, the entire electric control box is completed. There are several problems in manufacturing electric control boxes in this traditional way: 1. The production process is complicated and manual wiring is prone to errors. 2. The professional skills requirements for practitioners are relatively high. 3. High labor costs and low production efficiency. 4. Poor product consistency and poor aesthetics. 5. Unstable operating reliability of the product. 6. The product has poor protection performance, such as: protection against line aging, line short circuit, line fire, electromagnetic interference, water, moisture, corrosion, vibration, etc., and the insulation level is not high. 7. The product size is difficult to reduce. 8. It is impossible to achieve mechanization and automation of electric control box production.

[0004] Therefore, a technical solution for an electrical circuit board that can solve these problems is needed. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides an electrical circuit board, a manufacturing process and an electrical control box for the production of an electrical control box that subverts the traditional manufacturing process. It can not only overcome the above shortcomings, but also provide the necessary technical platform for high-voltage integration and strong and weak-voltage integrated integration.

[0006] The present invention provides an electrical circuit board for manufacturing an electrical control box, comprising a device fixing plate, a circuit laying plate, a current-carrying wire, and a conductive connector;

[0007] The first surface of the device fixing plate is used to arrange electrical devices;

[0008] The first surface of the circuit laying plate is arranged on the second surface of the device fixing plate;

[0009] The current-carrying wire is arranged on the second surface of the circuit laying board;

[0010] The conductive connecting member is disposed through the device fixing plate and the circuit laying plate, fixes the current-carrying wire to the second surface of the circuit laying plate, and electrically connects the current-carrying wire to the electrical device.

[0011] In a possible implementation, the second surface of the circuit laying board is printed with laying path indicator lines and numbers that match the wire diameter of the current-carrying wire and the electrical operation circuit.

[0012] The current-carrying conductors are arranged on the second surface of the circuit laying board according to the laying path indicator lines.

[0013] In a possible implementation, a packaging frame is provided around one side of the device fixing plate where the second surface is located, and is connected to the device fixing plate to form a concave packaging shell.

[0014] In a possible implementation manner, a packaging material for sealing at least the current-carrying wire is disposed in the concave packaging housing.

[0015] In a possible implementation, the conductive connector includes a conductive pin and a conductive sheet;

[0016] The conductive pin is arranged through the device fixing plate and the circuit laying plate, the first end of which fixes the current-carrying wire to the second surface of the circuit laying plate, and the second end of which is electrically connected to the first end of the conductive sheet;

[0017] The second end of the conductive sheet is used to be electrically connected to the electrical device.

[0018] In a possible implementation, the conductive pin includes an inner and outer threaded cylindrical screw, a lap joint, a locking nut, and a locking screw;

[0019] The inner and outer threaded cylindrical screw is arranged through the device fixing plate and the circuit laying plate;

[0020] The overlap sheet is sleeved on the inner and outer thread tube cylindrical screw on one side of the second surface of the circuit laying plate;

[0021] The locking nut fixes the inner and outer threaded cylindrical screw and the overlap sheet to the circuit laying plate, and fixes the current-carrying wire to the circuit laying plate through the overlap sheet;

[0022] The first end of the conductive sheet is electrically connected to the internal thread of the internal and external tooth tube cylindrical screw through the locking screw.

[0023] In a possible implementation, the locking nut includes an upper locking nut and a lower locking nut;

[0024] The upper locking nut is sleeved on the inner and outer threaded cylindrical screw on one side of the first surface of the line laying plate;

[0025] The lower locking nut is sleeved on the outermost side of the inner and outer thread tube cylindrical screw on one side of the second surface of the line laying plate.

[0026] In a possible implementation, the connecting piece is provided with a bayonet connected to the end of the current-carrying wire.

[0027] The present invention also provides a process for manufacturing an electrical circuit board, which is used to manufacture the electrical circuit board as described above, and comprises the following specific steps:

[0028] Preparing conductive connections;

[0029] Cutting mounting holes for embedded nuts for fixing electric devices and openings for the conductive connectors to pass through on the raw material of the device fixing plate to obtain an initial device fixing plate; riveting or welding embedded nuts on the initial device fixing plate, then performing surface treatment on the plate, and printing identification to obtain a device fixing plate;

[0030] Positioning holes for installing conductive connectors are cut on the raw material of the circuit laying board, and then the logo is printed to obtain the circuit laying board;

[0031] Installing the conductive connector on the circuit laying board according to the logo printed on the circuit laying board;

[0032] The second surface of the device fixing plate and the first surface of the circuit laying plate are relatively fitted together so that the two plate surfaces are closely fitted together as one;

[0033] Wires or sheets with conductive properties that meet the requirements are used as raw materials for current-carrying conductors. Wire processing equipment is used to process the raw materials for the current-carrying conductors according to straightening, bending, cutting, and end stripping steps to obtain current-carrying conductors that meet the requirements. The current-carrying conductors are electrically connected to the corresponding conductive connectors according to the markings printed on the circuit laying board.

[0034] The present invention also provides an electrical control box, comprising a box body, electrical components and the electrical circuit board as described above;

[0035] The electrical device is arranged on the electrical circuit board;

[0036] The electrical circuit board is arranged in the box.

[0037] The technical solution provided by the present invention has the following beneficial effects:

[0038] By using circuit laying boards and current-carrying wires, the production process is simplified, the production difficulty is reduced, the production efficiency is improved, and the labor cost is reduced. At the same time, the volume of the product is effectively reduced. Compared with existing products, the circuit laying board does not need to be designed with wiring troughs, which can greatly reduce the volume of the electric control box, thereby reducing material costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A schematic cross-sectional structure diagram of an electrical circuit board provided by an embodiment of the present invention;

[0040] Figure 2 A plan view of the second surface of a circuit laying plate used in an electric control box of a 5t crane provided in an embodiment of the present invention;

[0041] Figure 3 An enlarged schematic diagram of a local structure including a conductive connecting member provided in an embodiment of the present invention;

[0042] Figure 4 A plan view of the first surface of a device fixing plate used in an electric control box of a 5t crane provided by an embodiment of the present invention;

[0043] Figure 5 A plan view of the first surface of a circuit laying plate used in an electric control box of a 5t crane provided in an embodiment of the present invention;

[0044] Figure 6 A plan view of electrical connection of electrical components on a component fixing plate of an electric control box for a 5t crane provided in an embodiment of the present invention;

[0045] Figure 7a The electrical control schematic diagram of the primary circuit in the electric control box of a 5t crane provided in an embodiment of the present invention;

[0046] Figure 7b The electrical control schematic diagram of the secondary circuit in the electric control box of a 5t crane provided by an embodiment of the present invention;

[0047] In the accompanying drawings, 10, device fixing plate; 11, packaging frame; 12, opening; 20, circuit laying plate; 21, laying path indicator line; 22, positioning hole; 30, current-carrying wire; 40, conductive connector; 41, conductive pin; 42, conductive sheet; 50, electrical device; 60, packaging material; 411, inner and outer thread tube cylindrical screw; 412, overlap plate; 413, locking nut; 414, locking screw; 4121, bayonet; 4131, upper locking nut; 4132, lower locking nut. DETAILED DESCRIPTION

[0048] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. The embodiments are only used to explain the present invention and do not limit the protection scope of the present invention.

[0049] Please refer to Figures 1 to 6 The present invention provides an electrical circuit board for manufacturing an electrical control box, comprising a device fixing plate 10, a circuit laying plate 20, a current-carrying wire 30, and a conductive connecting member 40;

[0050] The first surface of the device fixing plate 10 is used to set the electrical device 50;

[0051] The first surface of the circuit laying plate 20 is arranged on the second surface of the device fixing plate 10;

[0052] The current-carrying wire 30 is disposed on the second surface of the circuit laying board 20;

[0053] The conductive connector 40 is disposed through the device fixing plate 10 and the circuit laying plate 20 , fixes the current-carrying wire 30 to the second surface of the circuit laying plate 20 through the strap 412 , and electrically connects the current-carrying wire 30 to the electrical device 50 through the conductive sheet 42 .

[0054] In this embodiment, the front side of the device fixing plate 10, i.e., the first surface, is used to fix the electrical device 50, and the necessary insulation safety spacing and heat dissipation space are maintained between the adjacent multiple electrical devices 50. The back side of the device fixing plate 10, i.e., the second surface, is used to fix and support the circuit laying plate 20. The function of the device fixing plate 10 is to fix all the electrical devices 50 and bear all their weight. The device fixing plate 10 is preferably made of a metal sheet, so that the device fixing plate 10 can not only serve as an electrical grounding busbar, but also the packaging frame 11 and the device fixing plate 10 can be made into one body to achieve seamless connection. The current-carrying wire 30 used to construct an electrical circuit and connect the electrical device 50 through the conductive connector 40 is laid on the circuit laying plate 20. The function of the circuit laying plate 20 is to fix all the current-carrying wires 30 and form the desired electrical circuit to ensure the electrical insulation between the electrical circuit and the device fixing plate 10. The current-carrying wire 30 is a plurality of conductive wires that do not cross each other and are designed in a certain shape. It is used to pass a large current and is made of conductive wires with excellent conductive properties, such as hard all-copper enameled wires. The first surface of the circuit laying plate 20 and the second surface of the device fixing plate 10 are tightly connected, which can be done by bonding, screwing or other mechanical connection methods.

[0055] In one possible implementation, Figure 2 The second surface of the circuit laying board 20 is printed with laying path indicator lines 21 and numbers matching the wire diameter of the current-carrying wire 30 and the electrical operation circuit;

[0056] The current-carrying conductors 30 are arranged on the second surface of the circuit laying board 20 according to the laying path indication lines 21 .

[0057] In this embodiment, the laying path indicator line 21 is an indicator line used to indicate the specific installation line and wire diameter of the current-carrying conductor 30. The number can be understood as the line number used to indicate the specific laying path indicator line 21, so as to more clearly indicate the layout route of each laying path indicator line 21. For example, if a certain laying path indicator line 21 is line 5, the number 5 can be printed on both ends of the laying path indicator line 21; if another laying path indicator line 21 is line 6, the number 6 can be printed on both ends of the laying path indicator line 21. By printing the laying path indicator line 21 and the number on the second surface of the line laying board 20, it is convenient to reduce the difficulty of wiring. The operator can select the model and make electrical connections of the current-carrying conductor 30 only according to the thickness and direction of the laying path indicator line 21 and the number, which effectively improves production efficiency and reduces labor costs.

[0058] In a possible implementation, a packaging frame 11 is disposed around one side of the device fixing plate 10 where the second surface is located, and is connected to the device fixing plate 10 to form a concave packaging shell.

[0059] In this embodiment, an integrally formed packaging frame 11 is provided on the four sides of the device fixing plate 10, and the inside of the packaging frame 11 is used to pour the packaging material 60. The function of the packaging frame 11 is to provide a closed space for the packaging material 60. In a specific implementation, the packaging frame 11 is preferably made of a metal plate, so that it and the device fixing plate 10 can be made of the same metal plate to achieve seamless connection. For example, the four sides of the device fixing plate 10 can be bent in the same direction to form a closed packaging frame 11.

[0060] In a possible implementation, a packaging material 60 for sealing at least the current-carrying wire 30 is disposed in the concave packaging housing.

[0061] In this embodiment, the packaging material 60 is made of insulating packaging glue or other insulating materials, preferably a two-component epoxy resin packaging glue. The function of the packaging material 60 is to cover the electrical circuit, achieve electrical insulation, and isolate the air around the electrical circuit, thereby improving the protection level of the entire electrical circuit board. After filling the packaging material 60, the product protection is effectively improved, and the conductive circuit inside the electrical circuit board is tightly wrapped by the insulating, fireproof, and waterproof packaging material 60. After the packaging material 60 is cured, the relative position of the conductive circuit is firmly locked and cannot be moved, and the surrounding air is isolated. In this way, the insulation level of the electrical circuit board, the circuit anti-aging, the circuit anti-fire, the circuit anti-moisture, the circuit anti-water immersion, the circuit anti-vibration, the circuit anti-corrosion, the circuit anti-bite and other performances have been greatly improved compared with the circuit layout in the existing electrical control box.

[0062] In a possible implementation, the conductive connector 40 includes a conductive pin 41 and a conductive sheet 42;

[0063] The conductive pin 41 is arranged through the device fixing plate 10 and the circuit laying plate 20, and the first end thereof fixes the current-carrying wire 30 to the second surface of the circuit laying plate 20 through the strap 412, and the second end thereof is electrically connected to the first end of the conductive sheet 42;

[0064] The second end of the conductive sheet 42 is used to be electrically connected to the electrical device 50 .

[0065] In this embodiment, a plurality of current-carrying wires 30 and corresponding conductive pins 41, as well as conductive sheets 42 and jumper sheets 412 corresponding to the conductive pins 41 are provided on the circuit laying board 20, which together constitute an electrical circuit. One end of the conductive sheet 42 is electrically connected to the wiring port of the electrical device 50, and the other end is connected to the internal thread of the conductive pin 41 by a screw. The function of the conductive pin 41 is to lead the wiring point of the electrical circuit constructed by the current-carrying wire 30 to the other side of the circuit laying board 20 to facilitate the electrical connection between the electrical circuit and the electrical device 50. The function of the conductive sheet 42 is to complete the electrical connection between the conductive pin 41 and the electrical device 50. The conductive sheet 42 can be made of a conductive metal sheet or wire, an insulating layer can be provided in the middle section, and the two ends are conductive. The conductive sheet 42 is preferably made of a hard conductive metal sheet.

[0066] In one possible implementation, Figure 3 The conductive pin 41 includes an inner and outer threaded cylindrical screw 411, a lap piece 412, a locking nut 413, and a locking screw 414;

[0067] The inner and outer threaded cylindrical screw 411 is disposed through the device fixing plate 10 and the circuit laying plate 20;

[0068] The overlap sheet 412 is sleeved on the inner and outer threaded cylindrical screw 411 on one side of the second surface of the circuit laying plate 20;

[0069] The locking nut 413 fixes the inner and outer threaded cylindrical screw 411 and the lap joint 412 to the circuit laying plate 20, and fixes the current-carrying wire 30 to the circuit laying plate 20 through the lap joint 412;

[0070] The first end of the conductive sheet 42 is electrically connected to the internal thread of the internal and external thread tube cylindrical screw 411 through the locking screw 414 .

[0071] In this embodiment, the current-carrying wire 30 can establish an electrical connection with the conductive sheet 42 through the lap joint 412 and the inner and outer threaded cylindrical screw 411 in sequence. The inner and outer thread design of the inner and outer threaded cylindrical screw 411 not only facilitates connecting the conductive sheet 42 to the inner and outer threaded cylindrical screw 411, but also facilitates fixing the conductive pin 41 as a whole on the circuit laying board 20.

[0072] In a possible implementation, the locking nut 413 includes an upper locking nut 4131 and a lower locking nut 4132;

[0073] The upper locking nut 4131 is sleeved on the inner and outer threaded cylindrical screw 411 on one side of the first surface of the circuit laying plate 20;

[0074] The lower locking nut 4132 is sleeved on the outermost side of the inner and outer threaded cylindrical screw 411 on one side of the second surface of the circuit laying plate 20 .

[0075] In this embodiment, the upper locking nut 4131 and the lower locking nut 4132 can both be made of conductive materials. The upper locking nut 4131 can also be made of insulating material, or an insulating layer can be provided on its surface. The upper locking nut 4131 is sleeved on the protruding portion of the inner and outer tube cylindrical screw 411 on one side of the first surface of the line laying plate 20, and can be spirally moved up and down through the external thread of the inner and outer tube cylindrical screw 411. The protruding portion of the inner and outer tube cylindrical screw 411 on the second surface side of the line laying plate 20 is first sleeved on the lap plate 412 at the innermost side close to the line laying plate 20, and then sleeved on the lower locking nut 4132 at the outermost side. By tightening the upper locking nut 4131 and the lower locking nut 4132 up and down, the overlapping piece 412 can be close to the circuit laying board 20. The compressed overlapping piece 412 can further press the joint of the current-carrying wire 30 onto the circuit laying board 20, and at the same time, the current-carrying wire 30 is electrically led out from the second surface of the circuit laying board 20 to the first surface of the circuit laying board 20.

[0076] In a possible implementation, the connecting piece 412 is provided with a socket 4121 connected to the end of the current-carrying wire 30 .

[0077] In this embodiment, Figure 3 The bayonet 4121 can be a gap formed between the raised edge of the connecting piece 412 and the circuit laying plate 20. The connecting piece 412 is made of conductive material, and the bayonet 4121 is specifically used to fix and electrically connect the current-carrying wire 30.

[0078] It should be noted that the electrical circuit board in the present invention is an electrical circuit board that can carry large current and high voltage, which can greatly improve the product quality and production efficiency of the electrical control box, reduce product volume and labor costs, improve product protection performance and service life, and is beautiful and consistent, creating the necessary conditions for the mechanized, automated production of electrical control boxes and the integrated integration of strong and weak electricity.

[0079] The present invention also provides a process for manufacturing an electrical circuit board, which is used to manufacture the electrical circuit board as described above, and comprises the following specific steps:

[0080] S1: Prepare the conductive connection member 40.

[0081] In this embodiment, the conductive connector 40 is composed of two parts, one part is arranged on the circuit laying board 20, and the other part is used to connect the electrical device 50. In a specific embodiment, the conductive connector 40 includes a conductive pin 41 and a conductive sheet 42. In step S1, conductive pins 41 and conductive sheets 42 of various specifications can be produced in batches in advance according to design requirements, or the conductive pins 41 can be produced first, and then the conductive sheets 42 can be produced when they are needed later. The conductive pin 41 includes an inner and outer tooth tube cylindrical screw 411, a lap plate 412, a locking nut 413, and a locking screw 414, which are mainly hardware components made by machine processing, and their surfaces are rust-proofed.

[0082] S2: Cutting mounting holes for embedded nuts for fixing the electric device 50 and openings 12 for the conductive connector 40 to pass through on the raw material of the device fixing plate to obtain an initial device fixing plate; riveting or welding embedded nuts on the initial device fixing plate, then performing surface treatment on the plate, and printing identification to obtain a device fixing plate 10.

[0083] In this embodiment, reference can be made to Figure 4 , assuming Figure 4 The board making rules are: the inner diameter of the whole board is 435x230mm, and the positive tolerance is not more than 0.5mm; the board thickness is 1.5mm, the outer diameter of the board is (435+3)×(230+3)mm, and the positive tolerance is not more than 0.5mm; there are M3 and M4 rivet nuts inside the board, Through hole; bend size 15mm all around, bend 90° downward. Figure 4 The technical requirements are as follows: First, a laser cutting machine is used to cut the metal plate and various openings and openings 12 to make a flat unfolded metal plate that integrates the device fixing plate 10 and the packaging frame 11. Then, a hydraulic bending machine is used to bend the four sides of the packaging frame 11 in the same direction to form the packaging frame 11. This operation can also be performed in step S5a. Next, the embedded nuts are riveted into the installation positioning holes of the embedded nuts on the formed metal plate, and the surface is sprayed with plastic. Finally, a UV printer is used to print relevant circuit identification and other information. In this way, a device fixing plate 10 can be completed.

[0084] S3: cutting positioning holes 22 for installing the conductive connectors 40 on the raw material of the circuit laying board, and then printing logos to obtain the circuit laying board 20.

[0085] In this embodiment, reference can be made to Figure 5 According to the corresponding technical requirements, the insulating board is cut by a CNC engraving machine, and various specifications of positioning holes 22 and other openings are opened to make the circuit laying board 20. Figure 2According to the corresponding technical requirements, a UV printer is used to print the relevant circuit identification and other information on the back side, that is, the second surface, of the circuit laying board 20. The size of the circuit laying board 20 can be 432*227mm and the thickness can be 1.5mm.

[0086] S4: installing the conductive connector 40 on the circuit laying board 20 according to the logo printed on the circuit laying board 20 .

[0087] In this embodiment, the manufactured conductive connector 40 can be installed according to the circuit identification printed on the circuit laying board 20 in step S3.

[0088] S5: The second surface of the device fixing plate 10 and the first surface of the circuit laying plate 20 are relatively fitted together so that the two plate surfaces are closely fitted together as one.

[0089] In this embodiment, the back side, i.e., the second surface, of the manufactured device fixing plate 10 is bonded to the front side, i.e., the first surface, of the circuit laying plate 20 by using double-sided adhesive tape, so that the two plates are tightly combined into one.

[0090] In a possible implementation, after step S5, step S5a may be further included. Step S5a is a step of making and installing the packaging frame 11, and may also be placed in step S2 or other suitable steps. In a specific implementation, the packaging frame 11 is made of a metal plate or an insulating plate, preferably a metal plate, and the four sides of the device fixing plate 10 are bent in the same direction to form the packaging frame 11, so that the device fixing plate 10 and the packaging frame 11 become one. The height of the packaging frame 11 is determined by the shape of the current-carrying wire 30 laid on the circuit laying plate 20. When the packaging frame 11 is made of an insulating plate, four strip insulating plates need to be made to be tightly fixed on the back side of the device fixing plate 10, that is, the four sides of the second surface.

[0091] S6: Use wire or sheet material with conductive properties that meet the requirements as the raw material of the current-carrying conductor, use wire processing equipment to process the raw material of the current-carrying conductor according to the steps of straightening, bending, cutting, and end stripping to obtain the current-carrying conductor 30 that meets the requirements, and electrically connect the current-carrying conductor 30 to the corresponding conductive connector 40 according to the mark printed on the circuit laying board 20.

[0092] In this embodiment, step S6 is a step of manufacturing and installing the current-carrying wire 30. In specific implementation, the current-carrying wire 30 is made of wire or sheet material with excellent conductive properties, preferably hard all-copper enameled wire. Figure 2The diameter and shape of the current-carrying wire 30 shown in the figure are made of enameled wires of different diameters. The bending and shaping of the enameled wires and the paint removal of the two ends can be done by special equipment or by hand. In order to prevent the current-carrying wires 30 from crossing each other, wire processing equipment is used in the specific implementation to go through straightening, bending, cutting, end stripping and other processes. The laying path of each current-carrying wire 30 is printed on the circuit laying board 20. After the current-carrying wire 30 is made, follow the Figure 2 The installation path of the current-carrying wire 30 shown in the figure is to install the current-carrying wire 30 along the laying path indicator line 21, and the prepared current-carrying wires 30 are electrically connected to the corresponding bayonet 4121 of the jumper 412 one by one, and the locking nut 413 is tightened, and then carefully checked to confirm that there are no errors, so as to obtain an assembled electrical circuit board.

[0093] In a possible implementation, after steps S1 to S6 are completed, step S7 may be further included.

[0094] Step S7 is to pour the packaging material 60. The packaging material 60 uses insulating packaging glue or other insulating materials, preferably two-component epoxy resin packaging glue. In the specific implementation, the assembled electrical circuit board is turned upside down and kept horizontal. The plugging material is first sprayed and the plugging effect is confirmed. Then, the two-component epoxy resin packaging glue is poured in to a specified amount, and the packaging material 60 is waited for solidification.

[0095] In a possible implementation, step S8 may also be included.

[0096] Step S8 is vibration and drying. In specific implementation, while waiting for the packaging material 60 to solidify, it is slightly vibrated to make the packaging glue fully dense and the surface smoother, and then it is dried to shorten the solidification time of the packaging material 60.

[0097] In a possible implementation, step S9 may also be included.

[0098] In step S9, the electrical device 50 is mounted on the front surface, i.e., the first surface, of the device fixing plate 10. Figure 6 The installation position of the electrical device 50 and its wiring port, conductive pin 41 and other related circuit identification are printed on the middle device fixing plate 10, and the electrical devices 50 are fixed one by one on the embedded nuts at the corresponding positions using appropriate screws.

[0099] In a possible implementation, after steps S1 to S9 are completed, step S10 may be further included.

[0100] In step S10, the conductive sheet 42 is installed. The conductive sheet 42 can be prefabricated in advance or made when needed. When making the conductive sheet 42, according to the designed parameters, wire or sheet with good conductive properties is used, and each conductive sheet 42 is made one by one using a wire harness processing machine or manually. Here, a hard sheet can be used to make the conductive sheet 42. Figure 6 Connect the two ends of the conductive sheet 42 to the wiring port of the electrical device 50 and the internal threads of the corresponding conductive pins 41 according to the relevant markings, and then carefully check to confirm that they are correct.

[0101] In the specific implementation, if the purpose is to obtain a corresponding electrical control box, step S11 may be further included. In step S11, the electrical circuit board equipped with the electrical device 50 may be fixed in the box shell of the electrical control box, thereby obtaining the corresponding electrical control box.

[0102] The present invention also provides an electrical control box, comprising a box body, an electrical device 50 and the electrical circuit board as described above;

[0103] The electrical device 50 is arranged on the electrical circuit board;

[0104] The electrical circuit board is arranged in the box.

[0105] In this embodiment, Figure 7a and 7b , showing the electrical control schematic diagram of the 5t crane electric control box, which mainly consists of 6 AC contactors 2K1, 2K2, 3K1, 3K2, 4K1, 4K2, 3 thermal relays FR2, FR3, FR4, 6 buttons SB3, SB4, SB5, SB6, SB7, SB8 and a set of wiring terminals. The fire limiter and the rising limiter are not in the electric control box, they are installed on the crane body. The specific installation position of the AC contactor, thermal relay and other electrical components 50 can be referred to Figure 6 .

[0106] The above embodiments should not limit the present invention in any way, and any technical solutions obtained by equivalent replacement or equivalent conversion shall fall within the protection scope of the present invention.

Claims

1. An electrical circuit board for making an electrical control box, Features: It includes a device fixing plate, a circuit laying plate, a current-carrying wire, and a conductive connecting piece; The first surface of the device fixing plate is used to arrange electrical devices; The first surface of the circuit laying plate is arranged on the second surface of the device fixing plate; The current-carrying wire is arranged on the second surface of the circuit laying board; The conductive connecting member is disposed through the device fixing plate and the circuit laying plate, fixes the current-carrying wire to the second surface of the circuit laying plate, and electrically connects the current-carrying wire to the electrical device.

2. The electrical circuit board according to claim 1, It is characterized in that The second surface of the circuit laying plate is printed with laying path indicator lines and numbers matching the wire diameter of the current-carrying wire and the electrical operation circuit; The current-carrying conductors are arranged on the second surface of the circuit laying board according to the laying path indicator lines.

3. The electric circuit board according to claim 1, It is characterized in that A packaging frame is arranged around one side of the device fixing plate where the second surface is located, and is connected with the device fixing plate to form a concave packaging shell.

4. The electric circuit board according to claim 3, It is characterized in that The concave packaging shell is provided with packaging material for at least sealing the current-carrying wire.

5. The electric circuit board according to claim 1, It is characterized in that The conductive connecting member includes a conductive pin and a conductive sheet; The conductive pin is arranged through the device fixing plate and the circuit laying plate, the first end of which fixes the current-carrying wire to the second surface of the circuit laying plate, and the second end of which is electrically connected to the first end of the conductive sheet; The second end of the conductive sheet is used to be electrically connected to the electrical device.

6. The electric circuit board according to claim 5, It is characterized in that The conductive pin includes an inner and outer threaded cylindrical screw, a lap joint, a locking nut, and a locking screw; The inner and outer threaded cylindrical screw is arranged through the device fixing plate and the circuit laying plate; The overlap sheet is sleeved on the inner and outer thread tube cylindrical screw on one side of the second surface of the circuit laying plate; The locking nut fixes the inner and outer threaded cylindrical screw and the overlap sheet to the circuit laying plate, and fixes the current-carrying wire to the circuit laying plate through the overlap sheet; The first end of the conductive sheet is electrically connected to the internal thread of the internal and external tooth tube cylindrical screw through the locking screw.

7. The electric circuit board according to claim 6, It is characterized in that The locking nut comprises an upper locking nut and a lower locking nut; The upper locking nut is sleeved on the inner and outer threaded cylindrical screw on one side of the first surface of the line laying plate; The lower locking nut is sleeved on the outermost side of the inner and outer thread tube cylindrical screw on one side of the second surface of the line laying plate.

8. The electric circuit board according to claim 6, It is characterized in that The connecting piece is provided with a bayonet connected to the end of the current-carrying wire.

9. A process for manufacturing an electrical circuit board, for manufacturing the electrical circuit board as claimed in any one of claims 1 to 8, It is characterized in that The specific steps include: Preparing conductive connections; Cutting mounting holes for embedded nuts for fixing electric devices and openings for the conductive connectors to pass through on the raw material of the device fixing plate to obtain an initial device fixing plate; riveting or welding embedded nuts on the initial device fixing plate, then performing surface treatment on the plate, and printing identification to obtain a device fixing plate; Positioning holes for installing conductive connectors are cut on the raw material of the circuit laying board, and then the logo is printed to obtain the circuit laying board; Installing the conductive connector on the circuit laying board according to the logo printed on the circuit laying board; The second surface of the device fixing plate and the first surface of the circuit laying plate are relatively fitted together so that the two plate surfaces are closely fitted together as one; Wires or sheets with conductive properties that meet the requirements are used as raw materials for current-carrying conductors. Wire processing equipment is used to process the raw materials for the current-carrying conductors according to straightening, bending, cutting, and end stripping steps to obtain current-carrying conductors that meet the requirements. The current-carrying conductors are electrically connected to the corresponding conductive connectors according to the markings printed on the circuit laying board.

10. An electrical control box, It is characterized in that Comprising a box, an electrical device and an electrical circuit board as claimed in any one of claims 1 to 8; The electrical device is arranged on the electrical circuit board; The electrical circuit board is arranged in the box.

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