A mobile worktable charging device for a press

Abstract

The utility model provides a kind of mobile workstation charging device for press, belong to charging equipment technical field, technical scheme is, a kind of mobile workstation charging device for press, the top of support is provided with actuating mechanism and charging brush upper brush block, the output end of actuating mechanism is connected with charging brush upper brush block transmission, actuating mechanism can drive charging brush upper brush block to lift along vertical direction, the bottom directly below of charging brush upper brush block is correspondingly provided with charging brush lower brush block, and charging brush lower brush block is electrically connected with charger.The utility model has the beneficial effect that the device can realize the stable reception of mobile workstation to electric energy.

Description

Technical Field

[0001] This utility model belongs to the field of charging equipment technology, specifically relating to a charging device for a mobile workbench of a press. Background Technology

[0002] The movable worktable of a press is a core component in forging production, primarily responsible for mold handling, workpiece bearing, and load transfer. Its stable operation requires a continuous power supply to drive the traveling mechanism, positioning components, and other actuators. To overcome the limitations of traditional wired power supply on the worktable's movement range and avoid the impact of power cord dragging on operational flexibility, equipping the movable worktable with a self-charging power supply system is a critical requirement. This system must adapt to the automated production rhythm of the press, ensuring the worktable's continuous operation under complex conditions, directly affecting the overall equipment efficiency and production continuity.

[0003] As shown in the patent announcement number CN201446738U, existing press moving worktables mostly use inductive power supply to achieve charging and power supply during movement. Its core structure includes an inductive power transmitter laid beside a ground guide rail, an inductive power receiver fixed to the bottom of the moving worktable, and a power conversion unit installed on the worktable. The charging and power supply processes are simultaneous: the ground transmitter generates an alternating electromagnetic field after being connected to an external power source; the receiver at the bottom of the moving worktable acquires electrical energy through electromagnetic induction; after processing by the power conversion unit, it directly powers the worktable's actuators; and excess electrical energy is stored in a temporary energy storage module.

[0004] However, the power reception stability of inductive power supply is poor. The mobile worktable needs to be started and stopped frequently during forging operations and needs to support molds of different weights. Due to equipment vibration and load changes, the coupling gap between the receiver and transmitter is prone to fluctuation, which leads to a decrease in electromagnetic coupling efficiency and frequent power reception interruptions or voltage instability. This directly causes the worktable to jam, the positioning accuracy to deviate, and affects the accuracy of mold docking. Utility Model Content

[0005] This invention addresses the problem of poor power reception stability in existing press moving worktables by providing a charging device for press moving worktables, which enables stable power reception by the moving worktable.

[0006] To solve the above problems, the technical solution adopted by this utility model is as follows: a charging device for a mobile worktable of a press, including a bracket, the bottom of which is fixedly connected to the top of the mobile worktable. An actuator and an upper charging brush block are provided on the top of the bracket. The output end of the actuator is connected to the upper charging brush block in a transmission manner. The actuator can drive the upper charging brush block to rise and fall vertically. The upper charging brush block is electrically connected to a battery. The battery is fixedly installed on the top of the mobile worktable. A lower charging brush block is provided directly below the upper charging brush block. The lower charging brush block is fixed on a base located below the mobile worktable. The lower charging brush block is electrically connected to a charger and can receive electrical energy output by the charger.

[0007] In this technical solution, the bottom of the support frame is fixedly connected to the top of the mobile worktable. The top of the support frame is equipped with an actuator and an upper charging brush block. The output end of the actuator is connected to the upper charging brush block, enabling it to drive the upper charging brush block to move vertically up and down. The upper charging brush block is electrically connected to a battery fixedly installed on the top of the mobile worktable. Directly below it is a lower charging brush block fixed to the base, which is electrically connected to a charger to receive power output. The upper and lower charging brush blocks use a precisely aligned rigid contact fit, replacing traditional inductive power supply with stable surface contact conduction. This effectively avoids transmission losses caused by electromagnetic interference and coupling gap fluctuations, ensuring the continuity and reliability of power transmission. Therefore, this device can achieve stable power reception by the mobile worktable.

[0008] Furthermore, the support frame comprises an integrally connected vertical and horizontal section, forming an L-shape. The bottom end of the vertical section is fixedly connected to the top of the movable worktable, while the actuator is installed at the free end of the horizontal section. This integrally connected L-shaped structure enhances overall rigidity and structural stability, reducing swaying caused by gaps and ensuring that the upper brush block is always precisely aligned with the lower brush block when the actuator drives it to rise and fall, guaranteeing docking accuracy. On the other hand, the layout of fixing the bottom of the vertical section to the top of the movable worktable and installing the actuator at the free end of the horizontal section allows the actuator and the upper brush block to extend to a suitable position above the movable worktable, avoiding interference between components such as the worktable's own walking mechanism and positioning components. This also provides ample space for vertical docking of the upper and lower brush blocks. Additionally, the L-shaped structure optimizes stress distribution, smoothly transferring the weight and lifting force of the actuator to the movable worktable through the vertical section, reducing localized stress concentration and extending the service life of the support frame and worktable.

[0009] Furthermore, the actuator includes an electric telescopic rod and a connecting plate. The electric telescopic rod is vertically arranged, with its cylinder fixedly connected to the free end of the horizontal section of the bracket. The telescopic end of the electric telescopic rod is fixedly connected to the connecting plate, which is horizontally arranged. A connecting seat is fixed to the bottom of the connecting plate, and the upper brush block of the charging brush is installed in the connecting seat. The actuator adopts a combination structure of electric telescopic rod and connecting plate. The electric telescopic rod is vertically arranged and its cylinder is fixed to the free end of the horizontal section of the bracket, which can control the lifting and lowering action with a stable linear driving force. Its telescopic accuracy is high, and it can accurately adjust the descent distance of the upper brush block of the charging brush, avoiding hard collisions or insufficient contact with the lower brush block of the charging brush. The connecting plate is horizontally arranged and the connecting seat is fixed to the bottom. On the one hand, a single electric telescopic rod can synchronously drive all connecting seats and the upper brush blocks of the charging brush inside to lift and lower, ensuring that the lifting and lowering actions of multiple sets of brush blocks are consistent and ensuring the alignment accuracy with the corresponding lower brush block of the charging brush below. On the other hand, the connecting plate can provide stable support for the connecting seats, reduce the shaking of the upper brush block of the charging brush during the lifting and lowering process, and maintain the stability of the brush block when in contact. Meanwhile, the connector provides installation and positioning space for the upper brush block of the charging brush, which can limit the lateral displacement of the upper brush block and further ensure the reliability of the brush block contact during power transmission. The overall structure can also be adapted to the force characteristics of the L-shaped bracket, so as to evenly transmit the lifting force to the bracket and avoid local structural overload.

[0010] Furthermore, a guide groove is provided at the bottom of the connector, which is vertically oriented. A pressure sensor and a spring are housed inside the guide groove. The pressure sensor is fixed to the bottom of the guide groove, the upper end of the spring is fixedly connected to the sensing end of the pressure sensor, and the lower end of the spring is fixedly connected to the top of the upper brush block of the charging brush. The bottom of the upper brush block extends outside the guide groove. The vertical guide groove at the bottom of the connector provides precise guidance for the raising and lowering of the upper brush block, limiting lateral displacement and ensuring that it always moves vertically. This guarantees the alignment accuracy with the lower brush block of the charging brush and avoids poor contact due to misalignment. The pressure sensor and spring are integrated inside the guide groove. The spring connects the pressure sensor and the upper brush block, providing a buffer when the upper brush block descends and contacts the lower brush block, preventing hard collisions that could cause wear or deformation of the brush block and extending the service life of the components. The pressure sensor can detect the contact pressure signal transmitted by the spring in real time. This signal can determine the contact state between the upper and lower brush blocks, preventing power transmission interruption due to insufficient contact pressure and avoiding damage to the brush blocks due to excessive pressure. Simultaneously, the signal can be transmitted to the subsequent control unit, providing precise triggering for the charger's start and stop, and achieving automated control of the charging process. Furthermore, the guide slot provides integrated installation space for the pressure sensor, spring, and upper brush block, making the structure more compact, reducing its footprint, and adapting to the limited installation area of ​​a mobile worktable.

[0011] Furthermore, the top of the connector extends upward through the connecting plate and above it. This extension is equipped with conductive contacts that are electrically connected to the brush block on the charging brush, and also electrically connected to the battery via a power cable. The connector's extension through the connecting plate and the placement of conductive contacts concentrates the power transmission path of the brush block on the charging brush within the connector itself, forming a compact conductive link from the brush block to the contacts and then to the battery, shortening the power transmission distance and reducing losses. The contacts are located above the connecting plate, facilitating connection to the battery's power cable and avoiding moving parts below the connecting plate, reducing the risk of wiring interference or wear. Simultaneously, the through-type structure of the connector fixes the relative position of the conductive contacts and the upper brush block, ensuring stable electrical connection even when the actuator moves the connecting plate up and down, preventing poor contact due to relative movement. In addition, the integrated conductive design reduces exposed conductive components, minimizing the impact of dust, oil, and other contaminants on the electrical connection, further improving the reliability of power transmission.

[0012] Furthermore, the upper charging brush block is located above the through-hole of the mobile worktable, and the lower charging brush block is located below the through-hole. A gap is provided between the top of the lower charging brush block and the bottom of the mobile worktable. The upper and lower charging brush blocks, located on the upper and lower sides of the through-hole, respectively, form a vertical, unobstructed docking channel, preventing the mobile worktable body from obstructing contact with the brush blocks. This ensures smooth and precise docking of the upper and lower charging brush blocks when descending, providing a direct path for power transmission. The gap between the top of the lower charging brush block and the bottom of the mobile worktable prevents friction or hard collisions between the bottom of the worktable and the lower brush block when the worktable is not charging, protecting both structures from wear and extending component lifespan. Simultaneously, this gap compensates for slight height deviations during positioning or operation of the mobile worktable, preventing deformation of the lower brush block due to height fluctuations, ensuring safety during brush block docking, and indirectly maintaining stability during the charging process.

[0013] Furthermore, there are four connectors arranged in a rectangular array at the bottom of the connecting plate. Each connector contains one upper brush block and four lower brush blocks. The distribution of the lower brush blocks on the base matches the rectangular array of the four connectors, with each lower brush block corresponding to a corresponding upper brush block. This rectangular array arrangement of the four connectors and the upper and lower brush blocks disperses the power transmission load through multi-point contact, preventing overheating or wear of individual brush blocks due to concentrated current, thus improving charging efficiency and component durability. The symmetrical layout of the rectangular array ensures balanced force on each brush block. When the actuator drives the lifting mechanism, the force on the connecting plate and base is more even, reducing the risk of local deformation and extending the overall structural lifespan. Simultaneously, the multi-point correspondence design provides redundancy; even if some brush blocks experience slight contact problems, the remaining brush blocks can still maintain power transmission, reducing the probability of charging interruptions due to single-point failures. In addition, the rectangular distribution is more adaptable to the structure of the mobile worktable, enabling precise alignment in a limited space, ensuring coaxiality when the upper and lower brush blocks are connected, and further improving contact stability.

[0014] Furthermore, the upper brush block of the charging brush is cylindrical, and the top of the lower brush block has a groove that matches the shape of the upper brush block. This matching cylindrical design of the grooves on the upper and lower brush blocks increases the contact area and improves power transmission efficiency. Simultaneously, the cylindrical contact helps disperse current density and prevents localized overheating. The chamfered edge of the lower end face of the upper brush block and the rounded corner of the opening at the top of the groove work together to guide the upper brush block during the docking process. Even with slight misalignment, the beveled surface guides the upper brush block to accurately embed into the groove, reducing the difficulty of docking.

[0015] Furthermore, the lower edge of the upper brush block of the charging brush is chamfered, and the top opening edge of the groove is rounded. The chamfer and rounded corners reduce edge stress concentration, prevent wear or deformation of the brush block edge due to hard contact during docking, and extend the service life of the component. At the same time, the adapted shape design can further enhance contact stability and ensure the continuity of power transmission.

[0016] Furthermore, an electrical remote substation is installed on the top of the mobile workbench. This substation connects to both the pressure sensor and the main control unit of the press via wireless communication. The substation receives detection signals from the pressure sensor and interacts with the main control unit. The main control unit connects to the charger via wireless communication, controlling its start / stop and output status. This wireless connection between the pressure sensor and the main control unit reduces wired connections between moving parts, preventing wire tangling and wear during workbench movement, and improving the flexibility and safety of equipment operation. As a signal relay node, the substation centrally processes the pressure sensor's detection signals and efficiently interacts with the main control unit, ensuring the main control unit monitors the contact status of the charging brushes in real time, providing accurate data for charger control. The main control unit controls the charger's start / stop and output via wireless communication, achieving automated closed-loop control of the charging process. It adjusts the charger's operation based on the brush contact status without manual intervention, avoiding ineffective power supply due to poor contact and preventing risks such as overvoltage and overcurrent, thus improving the stability and intelligence of the charging process. Meanwhile, wireless communication adapts to the dynamic characteristics of the mobile workbench, is unaffected by changes in position, ensures the continuity of signal transmission, and further enhances the overall operational reliability of the device.

[0017] As can be seen from the above technical solutions, the beneficial effects of this utility model are as follows: 1. Stable and efficient power transmission: Through precise brush block alignment, multi-point rectangular array distribution and rigid contact cooperation, transmission loss and single-point failure risk are effectively avoided, ensuring continuous and reliable power delivery to the battery.

[0018] 2. High structural durability: The L-shaped bracket enhances overall rigidity, the springs buffer impacts, and the chamfered corners of the brush blocks reduce wear. At the same time, the optimized force distribution significantly extends the service life of the components and the device as a whole.

[0019] 3. High level of automation and safety: The electrical remote substation is linked with the pressure sensor and the main control of the press to realize closed-loop control of charging. Wireless communication avoids the problem of wire tangling, eliminating the need for manual intervention and reducing safety hazards.

[0020] 4. Excellent adaptability: The gaps between brush blocks compensate for the height deviation of the workbench, and the compact integrated design adapts to the limited space and dynamic operation characteristics of the moving workbench, ensuring stable adaptation under different working conditions. Attached Figure Description

[0021] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a front view schematic diagram of a specific embodiment of the present utility model; Figure 2 This is a top view schematic diagram of a specific embodiment of the present utility model; Figure 3 This is a left-side view of a specific embodiment of the present utility model; Figure 4 for Figure 1 Enlarged view of a section at point A in the middle; Figure 5 for Figure 3 Enlarged view of a section at point B in the middle; Figure 6 This is a flowchart illustrating a specific embodiment of the present invention.

[0023] In the diagram: 1. Mobile worktable; 11. Through-hole; 2. Battery; 3. Actuator; 31. Electric telescopic rod; 32. Connecting plate; 33. Connecting seat; 331. Guide groove; 332. Pressure sensor; 333. Spring; 34. Conductive contact; 4. Upper brush block of charging brush; 5. Lower brush block of charging brush; 51. Groove; 6. Bracket; 61. Vertical section; 62. Horizontal section; 7. Base; 8. Power cord; 9. Electrical remote substation; 10. Press machine central control; 101. Charger. Detailed Implementation

[0024] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0025] A charging device for a mobile worktable 1 of a press is mainly used to solve the problem of unstable power supply when the mobile worktable 1 needs to be moved frequently during the operation of the press. Through a rigid contact power transmission structure and automatic control logic, the device achieves continuous and reliable power transmission. It also features a durable structure and strong adaptability, and can meet the long-term power supply needs of the mobile worktable 1 of the press.

[0026] like Figure 1-3As shown, specifically, the device is based on a mobile workbench 1 as the mounting carrier. A through-hole 11 is opened in the middle of the mobile workbench 1, and a storage battery 2 is fixedly installed on its top. The storage battery 2 is connected to the mounting base on the top of the mobile workbench 1 by bolt fastening. It is used to store the electrical energy received during the charging process and provide power for the movement, positioning and other actions of the mobile workbench 1.

[0027] like Figure 4-5 As shown, a bracket 6 is also fixedly connected to the top of the mobile worktable 1. The bracket 6 is L-shaped and includes an integrally formed vertical section 61 and a horizontal section 62. The bottom end of the vertical section 61 is fixed to the top edge of the mobile worktable 1 by welding or M8 bolts to ensure the overall stability of the bracket 6. The horizontal section 62 extends from the top of the vertical section 61 to the through-hole 11 of the mobile worktable 1. Its free end (the end away from the vertical section 61) is used to install the actuator 3. This layout allows the actuator 3 and subsequent components to extend directly above the through-hole 11, avoiding interference with the walking mechanism and positioning components of the mobile worktable 1.

[0028] The actuator 3 includes an electric telescopic rod 31, a connecting plate 32, and connecting seats 33. The electric telescopic rod 31 is arranged vertically, and its cylinder is fixedly connected to the bottom surface of the free end of the horizontal section 62 of the bracket 6 through a flange. The cylinder is also provided with reinforcing ribs on the outside to further improve the connection strength. The telescopic end of the electric telescopic rod 31 is set downward and fixed to the center position of the upper surface of the connecting plate 32 by bolts. The connecting plate 32 is a horizontal rectangular plate structure made of Q235 steel plate. Four connecting seats 33 are fixed to its lower surface by welding or bolts. The four connecting seats 33 are distributed in a rectangular array, and the center of the array is aligned with the center of the through-hole 11 of the movable worktable 1 to ensure the alignment accuracy of subsequent components.

[0029] Each connector 33 is a cylindrical structure with a guide groove 331 extending vertically at its bottom. The guide groove 331 is 50mm deep and its inner diameter matches the outer diameter of the upper brush block 4 of the charging brush, thus limiting the lifting direction of the upper brush block 4. Inside the guide groove 331, a pressure sensor 332 and a spring 333 are arranged sequentially from top to bottom. The pressure sensor 332 is fixed to the bottom of the guide groove 331 with bolts, and its sensing end is facing downwards. The upper end of the spring 333 is fixedly connected to the sensing end of the pressure sensor 332 by a snap-fit, and the lower end is fixedly connected to the top of the upper brush block 4 of the charging brush by welding. The upper brush block 4 of the charging brush is cylindrical and made of copper alloy. Its lower end face has a 45° chamfer, and its bottom extends from the opening end of the guide groove 331 to the outside of the connector 33, facilitating subsequent contact with the lower brush block 5 of the charging brush.

[0030] The top of the connector 33 extends upward through the connector plate 32 and above the connector plate 32. The outer peripheral wall of the extension is provided with conductive contacts 34. The conductive contacts 34 are made of copper sheets and are fixed to the side wall of the extension by screws. The conductive contacts 34 are electrically connected to the brush block 4 on the charging brush through the copper wires preset inside the connector 33. At the same time, the conductive contacts 34 are connected to the positive terminal of the battery 2 through the power line 8. The power line 8 is laid along the edge of the vertical section 61 and the horizontal section 62 of the bracket 6 and is fixed by wire clips to prevent the wires from getting tangled or worn during movement.

[0031] Below the mobile worktable 1, a base 7 is fixedly installed on the ground or press frame. The base 7 is made of cast iron, and four charging brush lower brush blocks 5 are fixed on its top. The distribution of the four charging brush lower brush blocks 5 is perfectly matched with the rectangular array distribution of the four connecting seats 33 at the bottom of the connecting plate 32, that is, each charging brush lower brush block 5 is located directly below the corresponding charging brush upper brush block 4. The top of the charging brush lower brush block 5 has a groove 51 that matches the charging brush upper brush block 4. The groove 51 is cylindrical, and its inner diameter is the same as the outer diameter of the charging brush upper brush block 4. The top opening edge of the groove 51 has a rounded corner with a radius of 2mm, which matches the chamfer of the charging brush upper brush block 4 to achieve docking guidance. In addition, a gap of 1-2mm is reserved between the top of the charging brush lower brush block 5 and the bottom of the mobile worktable 1 to avoid the movement of the mobile worktable 1 when it is not charging, avoid friction and wear between the two, and compensate for slight height deviations of the mobile worktable 1.

[0032] The lower brush block 5 of the charging brush is electrically connected to the output terminal of the charger 101 via a copper wire. The charger 101 is an industrial-grade DC charger (model: Mean Well SCN-600-24), which integrates a rectifier module, an output regulation unit and a communication interface. It can convert AC power into 24V DC power and adjust the output current according to the control signal. The charger 101 is fixedly installed next to the electrical cabinet of the press for easy wiring and maintenance.

[0033] To achieve automated control, an electrical remote substation 9 is fixedly installed at the top corner of the mobile workbench 1. The electrical remote substation 9 adopts an industrial-grade wireless communication module (model: E104-BT5032), which integrates an STM32F103 microcontroller as a signal processing unit, as well as a power supply module, a wireless transceiver module, and terminal blocks. The power supply terminal of the electrical remote substation 9 is connected to the battery 2 via a wire, and its signal input terminal is connected to the pressure sensor 332 in each connector 33 via wireless communication (ZigBee protocol, module model: CC2530) to receive the contact pressure signal detected by the pressure sensor 332 in real time.

[0034] The electrical remote substation 9 also establishes data interaction with the press master control 10 via wireless communication. The press master control 10 uses a Siemens S7-1200 series PLC (model: 1214CDC / DC / DC), which is installed in the press's control cabinet. Its input terminal receives the pressure signal transmitted by the electrical remote substation 9, and its output terminal is connected to the communication interface of the charger 101 through a 4G communication module (model: Quectel EC200S). When the pressure sensor 332 detects that the contact pressure between the upper brush block 4 and the lower brush block 5 of the charging brush reaches a preset value (e.g., 5N), the pressure signal... After being processed by the remote electrical substation 9, the signal is transmitted to the press machine control center 10. The press machine control center 10 determines that the charging conditions are met and then sends a start signal to the charger 101. The charger 101 starts and outputs electrical energy. The electrical energy is transmitted sequentially to the battery 2 through the lower charging brush block 5, the upper charging brush block 4, the copper wire inside the connector 33, the conductive contact 34, and the power line 8, completing the charging process. When the battery 2 is fully charged, the press machine control center 10 sends a stop signal to the charger 101 and simultaneously controls the electric telescopic rod 31 to retract, causing the upper charging brush block 4 to rise and reset, completing one charging cycle.

[0035] Work process: such as Figure 6 As shown, first, control the moving worktable 1 to move to the area directly above the base 7 until the upper brush block 4 of the charging brush and the lower brush block 5 of the charging brush on the base 7 are precisely aligned in the vertical direction. At this time, the through-hole 11 of the moving worktable 1 is between the upper brush block 4 and the lower brush block 5 of the charging brush, which is a reserved channel for subsequent brush block contact.

[0036] Next, the actuator 3 is activated, and the electric telescopic rod 31 in the actuator 3 begins to extend, driving the connecting plate 32 to descend vertically. The connecting plate 32 simultaneously drives the four connecting seats 33 at the bottom and the charging brush upper brush block 4 inside the seat to descend together. During the descent, the chamfer of the lower end face edge of the charging brush upper brush block 4 and the rounded corner of the top groove 51 of the charging brush lower brush block 5 cooperate with each other. Even if there is a slight misalignment, the inclined guide can make the charging brush upper brush block 4 accurately embedded in the groove 51 of the charging brush lower brush block 5 until the two are in complete contact.

[0037] When the upper brush block 4 of the charging brush comes into contact with the lower brush block 5 of the charging brush, the upper brush block 4 of the charging brush is compressed upward by the reaction force of the groove 51, and the spring 333 transmits the pressure to the pressure sensor 332 in the guide groove 331. When the contact pressure detected by the pressure sensor 332 reaches the preset value, a pressure detection signal is immediately generated and transmitted to the electrical remote substation 9 through wireless communication.

[0038] After receiving the pressure detection signal, the electrical remote substation 9 filters and amplifies the signal, and then transmits the processed charging preparation signal to the press machine central control 10 through a wireless communication link. After receiving the signal, the press machine central control 10 judges the validity of the signal. After confirming that the charging conditions are met, it sends a start command to the charger 101 through the communication link.

[0039] After receiving the start command, the charger 101 starts working, converting the mains power into 24V DC power and transmitting the power to the lower brush block 5 of the charging brush through the wires. The power is then transferred from the lower brush block 5 to the upper brush block 4 of the charging brush that is in contact with it, and then transmitted to the conductive contact 34 through the copper wires preset inside the connector 33. Finally, it is delivered to the battery 2 through the power line 8, and the battery 2 begins to store power and enters the charging stage.

[0040] During the charging process, the power detection module inside the charger 101 monitors the power status of the battery 2 in real time. When the power of the battery 2 reaches the full charge threshold, the charger 101 generates a full charge signal and feeds it back to the press control 10. After receiving the full charge signal, the press control 10 first sends a stop command to the charger 101, and the charger 101 stops outputting power. Then, the press control 10 sends a reset command to the actuator 3, the electric telescopic rod 31 retracts, and drives the connecting plate 32, the connecting seat 33 and the upper brush block 4 of the charging brush to rise vertically until the upper brush block 4 of the charging brush is completely separated from the lower brush block 5 of the charging brush and returns to the initial position. At this point, a complete charging process ends, the movable worktable 1 can leave the base 7 area, and the normal operation of the press can be resumed.

[0041] As can be seen from the above embodiments, the beneficial effects of this utility model are as follows: 1. Stable and efficient power transmission: Through precise brush block alignment, multi-point rectangular array distribution and rigid contact cooperation, transmission loss and single-point failure risk are effectively avoided, ensuring continuous and reliable power delivery to the battery.

[0042] 2. High structural durability: The L-shaped bracket enhances overall rigidity, the springs buffer impacts, and the chamfered corners of the brush blocks reduce wear. At the same time, the optimized force distribution significantly extends the service life of the components and the device as a whole.

[0043] 3. High level of automation and safety: The electrical remote substation is linked with the pressure sensor and the main control of the press to realize closed-loop control of charging. Wireless communication avoids the problem of wire tangling, eliminating the need for manual intervention and reducing safety hazards.

[0044] 4. Excellent adaptability: The gaps between brush blocks compensate for the height deviation of the workbench, and the compact integrated design adapts to the limited space and dynamic operation characteristics of the moving workbench, ensuring stable adaptation under different working conditions.

[0045] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A charging device for a mobile worktable of a press, characterized in that, Includes a bracket (6), the bottom of which is fixedly connected to the top of the mobile workbench (1). The top of the bracket (6) is provided with an actuator (3) and a charging brush upper block (4). The output end of the actuator (3) is connected to the charging brush upper block (4) in a transmission connection. The actuator (3) can drive the charging brush upper block (4) to rise and fall in the vertical direction. The charging brush upper block (4) is electrically connected to the storage battery (2). The storage battery (2) is fixedly installed on the top of the mobile workbench (1). A charging brush lower block (5) is provided directly below the charging brush upper block (4). The charging brush lower block (5) is fixed on the base (7). The base (7) is located below the mobile workbench (1). The charging brush lower block (5) is electrically connected to the charger (101). The charging brush lower block (5) can receive the electrical energy output by the charger (101).

2. The charging device for the mobile worktable of the press according to claim 1, characterized in that, The bracket (6) includes a vertical section (61) and a horizontal section (62) that are integrally connected. The whole is L-shaped. The bottom end of the vertical section (61) of the bracket (6) is fixedly connected to the top of the movable worktable (1). The actuator (3) is installed at the free end of the horizontal section (62) of the bracket (6).

3. The charging device for the mobile worktable of the press according to claim 2, characterized in that, The actuator (3) includes an electric telescopic rod (31) and a connecting plate (32). The electric telescopic rod (31) is arranged vertically. The cylinder of the electric telescopic rod (31) is fixedly connected to the free end of the horizontal section (62) of the bracket (6). The telescopic end of the electric telescopic rod (31) is fixedly connected to the connecting plate (32). The connecting plate (32) is arranged horizontally. A connecting seat (33) is fixed at the bottom of the connecting plate (32). The brush block (4) on the charging brush is installed in the connecting seat (33).

4. The charging device for the mobile worktable of the press according to claim 3, characterized in that, The bottom of the connector (33) is provided with a guide groove (331). The guide groove (331) is set in the vertical direction. A pressure sensor (332) and a spring (333) are provided inside the guide groove (331). The pressure sensor (332) is fixed at the bottom of the guide groove (331). The upper end of the spring (333) is fixedly connected to the sensing end of the pressure sensor (332). The lower end of the spring (333) is fixedly connected to the top of the brush block (4) on the charging brush. The bottom of the brush block (4) on the charging brush extends to the outside of the guide groove (331).

5. The charging device for the mobile worktable of the press according to claim 3, characterized in that, The top of the connector (33) extends upward through the connector plate (32) and above the connector plate (32). The extended portion is provided with a conductive contact (34). The conductive contact (34) is electrically connected to the brush block (4) on the charging brush, and the conductive contact (34) is electrically connected to the battery (2) through the power line (8).

6. The charging device for the mobile worktable of the press according to claim 1, characterized in that, The upper brush block (4) of the charging brush is located above the through-hole (11) of the mobile worktable (1), and the lower brush block (5) of the charging brush is located below the through-hole (11) of the mobile worktable (1). A gap is provided between the top of the lower brush block (5) of the charging brush and the bottom of the mobile worktable (1).

7. The charging device for a movable worktable of a press according to claim 3, characterized in that, There are four connectors (33). The four connectors (33) are arranged in a rectangular array at the bottom of the connector plate (32). Each connector (33) has a corresponding upper charging brush block (4). There are four lower charging brush blocks (5). The distribution of the four lower charging brush blocks (5) on the base (7) is adapted to the rectangular array distribution of the four connectors (33). Each lower charging brush block (5) corresponds to the corresponding upper charging brush block (4).

8. The charging device for a movable worktable of a press according to claim 7, characterized in that, The upper brush block (4) of the charging brush is cylindrical, and the top of the lower brush block (5) of the charging brush is provided with a groove (51) that matches the upper brush block (4). The groove (51) is cylindrical and matches the shape of the upper brush block (4).

9. The charging device for a movable worktable of a press according to claim 8, characterized in that, The lower edge of the upper brush block (4) of the charging brush is chamfered, and the top opening edge of the groove (51) is rounded.

10. The charging device for a movable worktable of a press according to claim 4, characterized in that, The top of the mobile workbench (1) is equipped with an electrical remote substation (9). The electrical remote substation (9) is connected to the pressure sensor (332) and the press master control (10) respectively through wireless communication signals. The electrical remote substation (9) can receive the detection signal of the pressure sensor (332) and interact with the press master control (10) through signal interaction. The press master control (10) is connected to the charger (101) through wireless communication signals. The press master control (10) can control the start and stop and output status of the charger (101).

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