A carbon steel wire bus butt joint device for diamond wire and transfer trolley
By setting multiple mounting slots and tempering terminals of different sizes on the electrode holder, combined with a transfer trolley, the problems of poor applicability of existing equipment and tedious manual winding are solved, enabling accurate docking and welding of carbon steel wire busbars of different diameters, and improving the flexibility and safety of the production line.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUPER NEW MATERIAL TECH HENGSHUI CO LTD
- Filing Date
- 2025-09-15
- Publication Date
- 2026-07-28
AI Technical Summary
The electrode holder of existing joint welding equipment can only be matched with carbon steel wire busbars of one diameter, resulting in poor applicability. Furthermore, it is difficult to connect thick carbon steel wire busbars by manual knotting, which increases the workload of manual winding and the risk of wire breakage during the cutting process.
A device for connecting carbon steel wire busbars for diamond wire is designed. The electrode clamping seat has multiple mounting slots of different sizes on its top surface. V-shaped slots are used for adaptive mounting. Welding is performed in conjunction with tempered terminals. A transfer trolley is also provided for flexible positioning, enabling the connection and welding of carbon steel wire busbars with different wire diameters.
It enables accurate butt welding of carbon steel wire busbars of different diameters, reduces welding stress, improves the flexibility and safety of the production line, reduces the amount of manual winding work, and avoids the risk of wire breakage.
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Figure CN224559885U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of diamond wire production equipment, and in particular to a carbon steel wire busbar docking device and a transfer trolley for diamond wire. Background Technology
[0002] Diamond wire is short for diamond cutting wire, also known as diamond cutting wire or diamond wire. Many hard materials in industry are cut using cutting steel wire or even higher-quality diamond wire, such as polycrystalline silicon wafers, monocrystalline silicon wafers, and silicon rods in the photovoltaic field.
[0003] The busbar base for electroplated diamond wire is high-carbon steel wire. Diamond micron powder is attached to the surface of the busbar body through electroplating. This carbon steel wire busbar is a relatively rigid carbon steel wire with a copper plating layer on its surface. When the busbar on the pay-off reel is used up, a new busbar reel needs to be installed in the pay-off cabinet. For busbars with a relatively thin diameter, such as magnetic diamond wire with a diameter of 0.1-0.2mm, one end of the busbar on the reel and the remaining end on the equipment can be connected by manually tying a knot. This way, the busbar around the guide wheel on the equipment does not need to be manually rewound. By starting the equipment, the new busbar can be pulled around the guide wheel and into the take-up cabinet. Once the knot moves to the take-up reel, the new busbar replacement is complete. This eliminates the need for workers to rewound the wire around the guide wheel every time they change the busbar. Because there are many guide wheels on the equipment, manual winding is quite tedious. Finished diamond wire cannot have knots. The knots on the main wire need to be moved to the take-up I-beam before production can begin. Users of diamond wire must also avoid knots during the cutting process to prevent wire breakage.
[0004] However, for thicker carbon steel wire busbars with a diameter in the range of 0.3 to 0.8 mm, it is difficult to achieve this by manually knotting them because the carbon steel wire busbars with a larger diameter are particularly rigid and cannot be knotted. In order to reduce the work of manually rewinding the wire, it is necessary to use a joint welding device to weld one end of the new carbon steel wire busbar to one end of the remaining carbon steel wire busbar in the equipment, so as to ensure that the joint is not easily broken when the equipment pulls the new wire.
[0005] Resistance butt welding equipment, also known as joint welding machines, is mainly used to firmly connect the ends of two metal wires of the same or different materials, such as copper, aluminum, steel, and alloys, through resistance heating and upsetting. Joint welding equipment includes a frame, clamping device, feeding mechanism, electrical control system, and cooling system. The electrode holder of the clamping device is usually made of a highly conductive and wear-resistant copper alloy, responsible for clamping and aligning the carbon steel wire busbar and ensuring conductivity. The top surface of the electrode holder has a V-shape that matches the wire diameter. However, existing joint welding equipment on the market only has one mounting slot on the top surface of the electrode holder, which cannot match carbon steel wire busbars of various diameters, resulting in poor applicability. Moreover, in diamond wire production workshops, including multiple parallel production lines, joint welding of carbon steel wire busbars is frequently required at different feeder positions. Therefore, joint welding equipment needs to be flexibly moved and positioned for operation.
[0006] Therefore, it is necessary to develop a carbon steel wire busbar docking device and a transfer trolley for diamond wire to address the above-mentioned defects. Utility Model Content
[0007] The purpose of this invention is to provide a carbon steel wire busbar butt welding device and a transfer trolley for diamond wire, which can butt weld carbon steel wire busbars of different diameters and can be flexibly positioned in the working position.
[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:
[0009] This utility model relates to a carbon steel wire busbar butt welding device for diamond wire, comprising a butt welding machine body, an electrode clamp, and a wire clamp arm. The electrode clamp has multiple mounting slots of different sizes on its clamping top surface, and the end of the carbon steel wire busbar is placed in the mounting slot. The clamping surface of the wire clamp arm is flat and can clamp the end of the carbon steel wire busbar in the mounting slot.
[0010] Furthermore, the mounting slot is specifically a V-shaped slot or an arc-shaped slot, and the cross-section of the V-shaped slot is a V-shaped profile with the opening facing upwards.
[0011] Specifically, there are three V-shaped slots, which can be used to adaptably clamp carbon steel wire busbars with wire diameters between 0.3 and 0.8 mm in sections.
[0012] Furthermore, the top outer wall of the main body fixed frame and sliding frame of the butt welding machine is provided with a groove for embedding the electrode holder. The electrode holder is installed in the groove by screws, and the groove is pre-embedded with a wiring contact piece for connecting the working end of the electrical control system.
[0013] Furthermore, it also includes tempering terminals, with two tempering terminals respectively disposed on the top walls of the main body fixed frame and the sliding frame of the butt welding machine and arranged face to face; the tempering terminals are electrically connected to the working end of the electrical control system.
[0014] Furthermore, the top of the tempering terminal is provided with a V-shaped groove for placing the connected carbon steel wire busbar.
[0015] Because high-carbon steel wire busbars are subject to greater welding stress, tempering can eliminate welding stress and defects, thereby improving welding quality.
[0016] This utility model also discloses a transfer trolley for transferring the carbon steel wire busbar docking device for diamond wire as described above between production lines. It includes a mobile trolley body and an insulating partition. The mobile trolley body is specifically a flatbed trolley formed from industrial aluminum profiles. The insulating partition is set on the top surface of the flatbed trolley, and the base of the docking welding machine body is placed on the insulating partition.
[0017] The transfer trolley was specially manufactured by the applicant and was not a purchased part. Based on actual production needs, the transfer trolley is used to flexibly move the working position of the carbon steel wire busbar docking device for diamond wire.
[0018] Furthermore, it also includes a limiting frame, which is made of insulating material and surrounds the base of the butt welding machine body.
[0019] Furthermore, the limiting frame has a notch at the power line outlet of the main body of the butt welding machine to allow for the exit of the wire.
[0020] Furthermore, the limiting frame includes an insertion frame, which is disposed at the outward opening of the limiting frame, and the insertion frame is inserted into the insulating partition in the manner of insertion posts.
[0021] Furthermore, the main body of the mobile trolley is provided with a vertical baffle on the side away from the plug-in frame, and a handle is provided on the top of the baffle facing outward.
[0022] Compared with the prior art, the advantages of this utility model of a carbon steel wire busbar splicing device and transfer trolley for diamond wire are as follows:
[0023] This utility model relates to a carbon steel wire busbar butt welding device for diamond wire. By opening multiple mounting slots of different sizes on the top surface of the electrode clamp, it can adaptably mount carbon steel wire busbars of different diameters, avoiding loose clamping and easy dislodgement, and ensuring accurate butt welding.
[0024] Furthermore, the mounting slots specifically employ V-shaped slots, each capable of adapting to carbon steel wire busbars with slightly different diameters, thereby improving positioning accuracy. By creating corresponding grooves at the electrode holder's mounting position, accurate installation and positioning of the electrode holder are achieved, facilitating disassembly and replacement. The addition of tempering terminals and a tempering function to the electrical control system allows for tempering of the butt-welded carbon steel wire busbars, reducing welding stress and preventing traction and weld breakage during later operations. The V-shaped groove at the top of the tempering terminals allows for suitable overlapping and energizing of carbon steel wire busbars with various diameters.
[0025] This utility model relates to a transfer trolley, which uses a flatbed cart formed from industrial aluminum profiles to flexibly move and position the carbon steel wire busbar docking device for diamond wire. It can switch working positions between different production lines, ensuring stable production across multiple lines. By adding an insulating partition, the carbon steel wire busbar docking device for diamond wire is electrically isolated, ensuring good safety during operation. A limiting frame is added to limit the base of the docking welding machine body, preventing slippage during transportation; and a detachable plug-in frame is added to prevent collisions with the limiting frame when loading or unloading the docking welding machine body. A handle is added, allowing for easy pushing and pulling of the trolley body to the welding station. Attached Figure Description
[0026] The present invention will be further described below with reference to the accompanying drawings.
[0027] Figure 1 This is a three-dimensional structural schematic diagram of the carbon steel wire busbar docking device for diamond wire of this utility model;
[0028] Figure 2 This is a three-dimensional structural diagram of the wire positioning seat of this utility model;
[0029] Figure 3 This is a schematic diagram of the main structure of the transfer trolley of this utility model;
[0030] Figure 4 This is a top view of the insulating partition of the transfer trolley of this utility model.
[0031] Explanation of reference numerals in the attached drawings: 1. Main body of the butt welding machine; 2. Electrode holder; 201. V-groove; 202. Mounting hole; 3. Wire clamp arm; 4. Tempering terminal; 401. V-groove; 5. Main body of the moving trolley; 501. Handle; 6. Insulating partition; 7. Limiting frame; 701. Wire outlet notch; 702. Insertion frame. Detailed Implementation
[0032] The core of this utility model is to provide a carbon steel wire busbar butt welding device and a transfer trolley for diamond wire, which can butt weld carbon steel wire busbars of different diameters and can be flexibly positioned in the working position.
[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0034] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0035] Refer to the attached diagram. Figure 1 This is a three-dimensional structural schematic diagram of the carbon steel wire busbar docking device for diamond wire of this utility model; Figure 2 This is a three-dimensional structural diagram of the wire positioning seat of this utility model; Figure 3 This is a schematic diagram of the main structure of the transfer trolley of this utility model; Figure 4 This is a top view of the insulating partition of the transfer trolley of this utility model.
[0036] Example 1
[0037] like Figure 1 and Figure 2 As shown, the carbon steel wire busbar butt welding device for diamond wire of this utility model includes a butt welding machine body 1, which has the same main structure and working principle as the existing resistance butt welding machine. The applicant has improved the existing butt welding machine body 1 by including an electrode clamp 2 and a wire clamp arm 3. The electrode clamp 2 has multiple mounting slots of different sizes on its clamping top surface, which are arranged in parallel and spaced apart. The end of the carbon steel wire busbar is placed in one of the mounting slots, and a suitable mounting slot can be selected according to the diameter of the carbon steel wire busbar. The clamping surface of the wire clamp arm 3 is flat and can clamp the end of the carbon steel wire busbar tightly in the mounting slot. The top opening of all the mounting slots can be covered by the clamping surface of the wire clamp arm 3.
[0038] In the diamond wire production process, for carbon steel wires with a diameter between 0.3 and 0.8 mm, due to their relatively large diameter, temporary traction connections cannot be made using knotting methods. Therefore, a butt welding device is required. Because the diameter range of carbon steel wires varies considerably, if only one clamping slot is provided, smaller diameter carbon steel wires may completely sink into the slot, preventing the clamping surface of the wire clamp arm 3 from clamping tightly. For larger diameter carbon steel wires, the joint may easily detach from the clamping slot, making precise alignment of the ends of the two carbon steel wires impossible.
[0039] By opening multiple mounting slots of different sizes on the top surface of the electrode holder 2, it is possible to adapt to the mounting of carbon steel wire busbars of different diameters, avoiding loose clamping and easy dislodgement, and ensuring accurate butt welding.
[0040] In one specific implementation of this embodiment, such as Figure 2 As shown, the mounting slot is specifically a V-shaped slot 201 or an arc-shaped slot. The cross-section of the V-shaped slot 201 is a V-shaped profile with the opening facing upwards.
[0041] Specifically, such as Figure 2 As shown, there are three V-shaped slots 201, which are evenly spaced on the top surface of the electrode holder 2.
[0042] Specifically, each V-shaped slot 201 has a marking on one side indicating the range of carbon steel wire diameter applicable to the corresponding V-shaped slot 201. The marking is made using a laser marking machine.
[0043] The mounting slot specifically adopts a V-shaped slot 201, and each V-shaped slot 201 can adapt to carbon steel wire busbars with slightly different diameters, thereby improving the positioning accuracy.
[0044] In one specific implementation of this embodiment, such as Figure 1 As shown, the top outer wall of the fixed frame and sliding frame of the butt welding machine body 1 has a groove for embedding electrode holders 2. The electrode holders 2 are installed in the groove by screws, which pass through the mounting holes 202 to complete the installation. The groove contains a wiring contact piece for connecting the working end of the electrical control system.
[0045] By creating a groove at the mounting position of the electrode holder 2, the electrode holder 2 can be accurately installed and positioned, thus facilitating disassembly and replacement.
[0046] In one specific implementation of this embodiment, such as Figure 1As shown, the carbon steel wire busbar butt welding device for diamond wire of this utility model also includes tempering terminals 4. Two tempering terminals 4 are respectively installed on the top walls of the fixed frame and the sliding frame of the butt welding machine body 1, facing each other. The tempering terminals 4 are L-shaped copper plates and are fixed by screws at their base. The tempering terminals 4 are electrically connected to the working end of the electrical control system, and the electrical control system supplies tempering current to the tempering terminals 4.
[0047] Specifically, such as Figure 1 As shown, the top of the tempering terminal 4 is provided with a V-shaped groove 401 for placing the connected carbon steel wire busbar.
[0048] By adding a tempering terminal 4, the electrical control system gains a tempering function, which can temper the carbon steel wire busbars that have been butt-welded, reducing welding stress and preventing breakage at the weld joint during traction and later operation. A V-groove 401 is provided at the top of the tempering terminal 4, allowing for suitable overlapping and energizing of carbon steel wire busbars with various wire diameters.
[0049] In one specific embodiment of this invention, the operation panel of the base of the butt welding machine body 1 is equipped with a multi-level adjustable knob. For carbon steel wire busbars of different diameters, the current level can be adjusted, making it suitable for butt welding of carbon steel wire busbars of different diameters. The circuit control system in this part uses a knob, i.e., a potentiometer, to provide the setting signal, and the power output of the IGBT is controlled in a closed loop by an electronic circuit, which will not be elaborated further.
[0050] The process of using this utility model of carbon steel wire busbar splicing device for diamond wire is as follows: Pull out one end of the new carbon steel wire busbar and one end of the residual carbon steel wire busbar from the production line equipment. First, determine which V-groove 201 to select based on the wire diameter specification of the carbon steel wire busbar. With the eccentric wheel handle of the splicing device in the open position, the welding opening is open. Press the handle end of the wire clamp arm 3 on the right side with your left hand, and the clamping surface of the wire clamp arm 3 will disengage from the electrode clamp seat 2. Place the end of the residual carbon steel wire busbar into the selected V-groove 201 with your right hand, making sure that the end protrudes towards the center. Release the wire clamp arm 3, and the wire clamp arm 3 will clamp the end of the residual carbon steel wire busbar into the V-groove 201. Then, press the handle end of the left-side wire clamp arm 3 with your right hand. The clamping surface of the wire clamp arm 3 will disengage from the electrode clamp seat 2. With your left hand, place the end of the new carbon steel wire busbar into the V-shaped groove 201 corresponding to the end of the remaining carbon steel wire busbar, ensuring that the end protrudes slightly towards the center. Release the wire clamp arm 3, which will clamp the end of the new carbon steel wire busbar into the V-shaped groove 201. Operate the eccentric wheel handle to close the welding opening, and operate the knob to start welding. The two clamped ends pass through a large current, generating resistance heat and quickly completing the welding. Hold the two ends of the weld point and place them into the V-shaped groove 401 at the top of the tempering terminal 4 to lap and energize. The tempering current heats the wire segment near the weld point, completing the tempering and reducing welding stress.
[0051] In summary, this utility model's carbon steel wire busbar butt welding device for diamond wire achieves adaptive butt welding of carbon steel wire busbars of different diameters by opening multiple mounting slots of different sizes on the clamping top surface of the electrode clamp 2. This avoids loose clamping and easy dislodgement, ensuring accurate butt welding. Furthermore, the mounting slots specifically employ V-shaped slots 201, each capable of adapting to carbon steel wire busbars with slightly different diameters, thus improving positioning accuracy. The grooves provided at the installation positions of the electrode clamp 2 ensure accurate installation and positioning of the electrode clamp 2, facilitating disassembly and replacement. The addition of a tempering terminal 4 and a tempering function to the electrical control system allows for tempering of the butt-welded carbon steel wire busbars, reducing welding stress and preventing traction and weld breakage during later operations. The V-shaped slot 401 at the top of the tempering terminal 4 enables suitable overlapping and energizing of carbon steel wire busbars of various diameters.
[0052] Example 2
[0053] like Figure 3 and Figure 4 As shown, this utility model also discloses a transfer trolley for transferring the aforementioned carbon steel wire busbar docking device for diamond wire between production lines. The transfer trolley of this utility model includes a mobile trolley body 5 and an insulating partition 6. The mobile trolley body 5 is specifically a flatbed trolley formed from industrial aluminum profiles, with casters installed at the four corners of the bottom of the flatbed trolley, each caster having a parking brake function. The insulating partition 6 is set on the top surface of the flatbed trolley and connected using screws. The base of the butt welding machine body 1 is placed on the insulating partition 6. The insulating partition 6 is specifically made of resin bakelite board.
[0054] In diamond wire production workshops, multiple production lines are often arranged in parallel to improve production efficiency and save space. Therefore, this arrangement inevitably requires joint welding at different wire feeding stations, necessitating a flexible carbon steel wire busbar splicing device for the diamond wire to be positioned and operated.
[0055] The carbon steel wire busbar docking device for diamond wire is flexibly moved and positioned using a flatbed cart formed from industrial aluminum profiles, allowing for switching of working positions between different production lines and ensuring stable production across multiple lines. The addition of an insulating partition 6 provides electrical isolation for the carbon steel wire busbar docking device, ensuring good safety during operation.
[0056] In one specific implementation of the embodiment, such as Figure 3 and Figure 4As shown, the transfer trolley of this utility model also includes a limiting frame 7, which is a square frame made of insulating board, and the limiting frame 7 is arranged around the base of the butt welding machine body 1.
[0057] Specifically, such as Figure 4 As shown, the limiting frame 7 has a wire outlet notch 701 at the power line outlet position of the butt welding machine body 1 to allow for the exit.
[0058] Specifically, such as Figure 3 and Figure 4 As shown, the limiting frame 7 includes an insertion frame 702, which is located at the outward opening of the limiting frame 7. The insertion frame 702 is inserted into the insulating partition 6 using a plug-in post method. Two pins are respectively provided at both ends of the bottom surface of the insertion frame 702, and the insulating partition 6 has insertion holes at the corresponding positions.
[0059] By adding a limiting frame 7 to limit the base of the butt welding machine body 1, it is possible to prevent slippage during transportation; by adding a flexible detachable plug-in frame 702, it is possible to prevent collision with the limiting frame 7 when the butt welding machine body 1 is being moved down or up.
[0060] In one specific embodiment of this example, the main body 5 of the mobile trolley is provided with a vertical baffle on the side away from the insertion frame 702, and a handle 501 is provided on the top of the baffle facing outward.
[0061] By adding a handle 501, the main body 5 of the mobile trolley can be easily pushed and pulled into place at the welding station.
[0062] In summary, this utility model's transfer trolley, using a flatbed cart formed from industrial aluminum profiles, allows for flexible movement and positioning of the carbon steel wire busbar docking device for diamond wire. It enables switching of working positions between different production lines, ensuring stable production across multiple lines. The addition of an insulating partition 6 provides electrical isolation for the carbon steel wire busbar docking device, ensuring good safety during operation. The addition of a limiting frame 7 limits the base of the welding machine body 1, preventing slippage during transport. The addition of a detachable plug-in frame 702 prevents collisions with the limiting frame 7 when loading or unloading the welding machine body 1. The addition of a handle 501 allows for easy pushing and pulling of the trolley body 5 to the welding station.
[0063] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.
[0064] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.
Claims
1. A device for butt welding carbon steel wire busbars for diamond wire, comprising a butt welding machine body (1), characterized in that, It also includes an electrode holder (2) and a wire clamp arm (3). The electrode holder (2) has multiple mounting slots of different sizes on its clamping top surface, and the end of the carbon steel wire busbar is placed in the mounting slot. The clamping surface of the wire clamp arm (3) is flat and can clamp the end of the carbon steel wire busbar in the mounting slot.
2. The carbon steel wire busbar splicing device for diamond wire according to claim 1, characterized in that: The mounting slot is specifically a V-shaped slot (201) or an arc-shaped slot, and the cross-section of the V-shaped slot (201) is a V-shaped profile with the opening facing upward.
3. The carbon steel wire busbar splicing device for diamond wire according to claim 1, characterized in that: The main body (1) of the butt welding machine has a groove on the top outer wall of the fixed frame and the sliding frame for embedding the electrode holder (2). The electrode holder (2) is installed in the groove by screws. The groove is pre-embedded with a wiring contact piece for connecting the working end of the electrical control system.
4. The carbon steel wire busbar splicing device for diamond wire according to claim 1, characterized in that: It also includes tempering terminals (4), two of which are respectively set on the top walls of the fixed frame and the sliding frame of the butt welding machine body (1) and face to face; the tempering terminals (4) are electrically connected to the working end of the electrical control system.
5. The carbon steel wire busbar splicing device for diamond wire according to claim 4, characterized in that: The top of the tempering terminal (4) is provided with a V-shaped groove (401) for placing the carbon steel wire busbar after it has been connected.
6. A transfer trolley for transferring the carbon steel wire busbar splicing device for diamond wire according to any one of claims 1 to 5 between production lines, characterized in that: It includes a mobile trolley body (5) and an insulating partition (6). The mobile trolley body (5) is specifically a flatbed trolley formed from industrial aluminum profiles. The insulating partition (6) is set on the top surface of the flatbed trolley, and the base of the butt welding machine body (1) is placed on the insulating partition (6).
7. The transfer trolley according to claim 6, characterized in that: It also includes a limiting frame (7), which is made of insulating board and surrounds the base of the butt welding machine body (1).
8. The transfer trolley according to claim 7, characterized in that: The limiting frame (7) has a wire outlet notch (701) at the power line outlet position of the butt welding machine body (1) to allow for the wire to pass.
9. The transfer trolley according to claim 7, characterized in that: The limiting frame (7) includes a plug-in frame (702), which is located at the outward opening of the limiting frame (7). The plug-in frame (702) is plugged into the insulating partition (6) using a plug-in post method.
10. The transfer trolley according to claim 9, characterized in that: The main body (5) of the mobile trolley has a vertical baffle on the side away from the plug-in frame (702), and a handle (501) is provided on the top of the baffle.