A crown pulley type switch device and a switching circuit

Abstract

The application relates to a trolley type switch device and a switching circuit. The device part mainly comprises a track and an electricity connection extension piece arranged on a plurality of series-connected coils; the track is provided with two movable trolleys, each of the trolleys is connected with an electricity connection assembly through a connecting piece, one side of the electricity connection assembly is provided with a short circuit plate, the electricity connection extension piece is provided with a plurality of electricity connection extension pieces and is arranged at the incoming line end of a first coil and the outgoing line end of each coil in the series-connected coils; one part of the electricity connection assembly keeps in contact with the short circuit plate, the other part of the electricity connection assembly is in contact with or separated from the electricity connection extension piece along with the movement of the trolley; when the two electricity connection assemblies respectively contact one electricity connection extension piece, the coils between the two contacted electricity connection extension pieces are short-circuited. The application can greatly reduce the product cost and solve the problem of high cost of the existing signaling machine tuning circuit switch.

Description

Technical Field

[0001] This application relates to the technical field of switching devices, and particularly to a gantry-type switching device and a switching circuit. Background Art

[0002] With the continuous development of domestic high-power transmitter equipment, its power and equipment frequency have gradually increased. This has led to a significant increase in the volume of the tuning circuit equipment components, and further increased the scale of circuit components such as extension coils. Even the height of the switching device配套with the extension coil has exceeded a certain degree (for example, exceeded 2 meters). In the application scenario of the switching device that carries the input high-frequency power in the communication transmission field, such changes have had an important impact on aspects such as the performance and cost of the equipment. In order to better match the impedance of the tuning circuit with the external circuit, the industry has begun to explore effective solutions to improve the overall performance and adaptability of the equipment.

[0003] In the prior art, in order to achieve the matching of the impedance of the tuning circuit with the external circuit, usually several or even more than a dozen coils are connected in series, and then some of the coils are short-circuited according to the situation of the external circuit, so as to achieve the purpose of impedance matching. In a specific circuit solution, in order to short-circuit some of the coils, a single-pole single-throw switch is often connected to the outgoing end of each coil, and then all the single-pole single-throw switches are connected to the incoming end of the first coil. In this setting, if some of the coils need to be short-circuited, the first and last single-pole single-throw switches of the first and last coils of this part of the coils need to be closed. This method can achieve the short-circuit operation of the coils to a certain extent, but there are some limitations in practical applications: in the above setting, each coil needs to correspond to a single-pole single-throw switch. For a high-power circuit such as the tuning circuit of a transmitter, the cost of the switch is quite high, which undoubtedly increases the cost investment of the entire equipment and is not conducive to the large-scale application and promotion of the equipment.

[0004] Based on the above situation, how to solve the technical problem of the high cost of the switch in the existing transmitter tuning circuit is a difficult problem to be solved in this technical field. Summary of the Invention

[0005] In view of the above-mentioned defects or improvement requirements of the prior art, in order to solve the technical problem of the high cost of the switch in the existing transmitter tuning circuit, this application provides a gantry-type switching device and a switching circuit. By combining the gantry with the switch, the circuit that originally required several sets or even more than a dozen sets of switches to form can be simplified to only two sets of power connection components to achieve the short-circuit of the circuit, greatly reducing the cost of the product, and also increasing the reliability of the product due to the reduction in the number of power connection components.

[0006] The embodiments of this application adopt the following technical solutions: In a first aspect, this application provides a crane-type switch device, including a track and a power-connecting extension member disposed on a plurality of coils connected in series; two movable cranes are disposed on the track, each crane is connected to a power-connecting component via a connector, a short-circuit plate is disposed on one side of the power-connecting component, and the power-connecting extension member is provided with a plurality of extension members disposed on the input end of the first coil and the output end of each coil in the series connection. One part of the power connection component remains in contact with the short-circuit board, and the other part of the power connection component contacts or separates from the power connection extension component as the crane moves; when two power connection components contact one power connection extension component respectively, the coil between the two contacted power connection extension components is short-circuited.

[0007] By adopting the above technical solution, the coil short-circuit function that originally required several or even more than ten sets of switches can be achieved with two sets of overhead cranes and two sets of power connection components. This not only significantly reduces product costs and solves the problem of high cost of existing transmitter tuning circuit switches, but also improves product reliability due to the reduction in the number of overhead cranes and power connection components compared to the original number of switches.

[0008] In some embodiments, the power connection assembly includes a power connection frame and a plurality of power connection blocks that are floatingly disposed on the power connection frame by means of elastic elements. The power connection frame is fixedly connected to the connector, and the power connection blocks are respectively used to contact the power connection extension and the short circuit board.

[0009] By adopting the above technical solution, the grounding block is floatingly set on the grounding frame. Under the action of the elastic element, its position can be adaptively adjusted to ensure full contact with the grounding extension and shorting board, improve the electrical conduction effect, and adapt to the positional tolerance and surface unevenness of the grounding extension and shorting board, making the circuit connection more reliable.

[0010] In some embodiments, the grounding blocks are provided in three sets. The first set of grounding blocks is disposed facing the short-circuit plate and is kept in contact with the short-circuit plate under the action of the elastic member. The second and third sets of grounding blocks are disposed opposite to each other. When the grounding assembly moves to the position corresponding to the grounding extension member, the second and third sets of grounding blocks are clamped on both sides of the grounding extension member under the action of the elastic member.

[0011] By adopting the above technical solution, it is possible to ensure that the power connection component and the short-circuit board maintain continuous and stable contact. At the same time, when moving to the corresponding position of the power connection extension component, reliable contact with the power connection extension component is achieved through the clamping of two sets of power connection blocks, which ensures the stability and reliability of the circuit connection and is conducive to better realizing the short-circuit function of the coil.

[0012] In some embodiments, one side of the grounding block has curved chamfers on both sides, and the side of the second and third grounding blocks facing each other has curved chamfers.

[0013] By adopting the above technical solution, the arc-shaped chamfer design of the grounding block can make the second and third sets of grounding blocks contact the grounding extension more smoothly, reduce the resistance and wear during contact, and improve the service life and contact stability of the grounding assembly.

[0014] In some embodiments, the power extension member, the power frame, the elastic member, the power block, and the short-circuit plate are all made of conductive materials.

[0015] By adopting the above technical solution, a complete conductive path can be formed between the power connection component, the power connection extension component, and the short-circuit board, so that the current can be smoothly conducted, thereby ensuring the normal operation of the overhead crane switch device for coil short-circuit operation.

[0016] In some embodiments, the connector is made of insulating material, one end of the connector is fixed to the overhead crane, and the other end of the connector is fixed to the power connection assembly.

[0017] By adopting the above technical solution and using insulated connectors to connect the overhead crane and the power connection components, current can be prevented from being conducted between the overhead crane and the power connection components, thus ensuring the normal operation of the overhead crane.

[0018] In some embodiments, the track includes an I-shaped profile and a rack disposed on the inner top surface of the profile; the overhead crane includes a main fixing plate and a secondary fixing plate respectively disposed on both sides of the profile, the main fixing plate and the secondary fixing plate being connected by a connecting rod assembly; a gear that meshes with the rack is disposed on the side of the main fixing plate facing the profile, and a servo motor and a worm gear reducer are disposed on the side of the main fixing plate away from the profile, the servo motor, the worm gear reducer and the gear being connected in sequence; a drive frame for mounting a servo motor driver is disposed on the side of the secondary fixing plate away from the profile, and support wheel sets for contacting the inner bottom surface of the profile are disposed on the side of both the main fixing plate and the secondary fixing plate near the profile.

[0019] By adopting the above technical solutions, accurate track guidance and stable support structure can be provided for the movement of the overhead crane. The combination of servo motor and worm gear reducer can provide reliable power and self-locking function. With the setting of gears and racks, the positioning of the overhead crane is guaranteed to be accurate and avoid accidental operation when power is off. At the same time, the drive frame is used to reasonably place the drive.

[0020] In some embodiments, the secondary fixing plate is provided with a top wheel assembly on the side near the profile for contacting the inner top surface of the profile, and both the main fixing plate and the secondary fixing plate are provided with side wheel assemblies on the side near the profile for contacting the inner side surface of the profile.

[0021] By adopting the above technical solution, the top wheel assembly contacts the inner top surface of the profile, and the side wheel assembly contacts the inner side surface of the profile, which can improve the stability and quietness of the crane during movement, and further ensure that the crane can only move along the track direction.

[0022] In some embodiments, limiting pieces are provided on the sides of both the main fixing plate and the secondary fixing plate, and at least a portion of the limiting pieces extend into the inside of the profile.

[0023] By adopting the above technical solution, the overhead crane can be locked on the track in case of an accident such as overturning, preventing it from derailing and improving the safety of the equipment.

[0024] Secondly, this application provides a switching circuit applied to the crane-type switching device described in the first aspect, including a short-circuit plate, a first power-connecting component, a second power-connecting component, and a plurality of coils arranged in series, each coil having contact points at both ends; a portion of the first power-connecting component and the second power-connecting component are in contact with the short-circuit plate and are movably disposed, and another portion of the first power-connecting component and the second power-connecting component are in contact with or separated from the contact points of the coils by moving.

[0025] By adopting the above technical solution and utilizing the characteristics of the crane-type switch device, the effect of short-circuiting any selected coil segment can be achieved by controlling the movement of the first and second energizing components in the switch circuit. This eliminates the need to equip each coil with a switch, significantly reducing costs and improving the reliability and flexibility of the circuit system.

[0026] In summary, this application includes at least the following beneficial technical effects: 1. It can achieve the coil short-circuit function that originally required several or even more than ten sets of switches with two sets of overhead cranes and two sets of power connection components. This not only significantly reduces product costs and solves the problem of high cost of existing transmitter tuning circuit switches, but also improves product reliability due to the reduction in the number of overhead cranes and power connection components compared to the original number of switches. 2. The grounding block is floatingly mounted on the grounding frame. Under the action of the elastic element, its position can be adaptively adjusted to ensure full contact with the grounding extension and shorting board, improve the electrical conduction effect, and adapt to the positional tolerance and surface unevenness of the grounding extension and shorting board, making the circuit connection more reliable. 3. The rounded chamfer design of the grounding blocks allows the second and third sets of grounding blocks to make smoother contact with the grounding extension, reducing contact resistance and wear, and improving the service life and contact stability of the grounding components. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly described below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of a crane-type switchgear provided in an embodiment of this application; Figure 2 This is a schematic diagram of the track structure provided in an embodiment of this application; Figure 3 This is a schematic diagram of the structure of the overhead crane provided in an embodiment of this application; Figure 4 This is a schematic diagram of the structure of the first type of support wheel assembly provided in the embodiments of this application; Figure 5 This is a schematic diagram of the structure of the second type of support wheel assembly provided in the embodiments of this application; Figure 6 This is a schematic diagram of the side wheel assembly provided in an embodiment of this application; Figure 7 This is a schematic diagram of the top wheel assembly provided in an embodiment of this application; Figure 8 This is a schematic diagram of the connecting rod assembly provided in an embodiment of this application; Figure 9 This is a schematic diagram of the structure of the power connection assembly provided in the embodiments of this application; Figure 10 A schematic diagram of a conventional circuit scheme provided in the embodiments of this application; Figure 11 This is a schematic diagram of a switching circuit scheme provided in an embodiment of this application; Figure 12 This is a schematic diagram of a short-circuited coil in a switching circuit provided in an embodiment of this application.

[0029] In the picture: 1. Track; 101. Profile; 102. Rack; 2. Power extension components; 3. Overhead crane; 301. Main fixing plate; 302. Secondary fixing plate; 303. Connecting rod assembly; 3031. First connecting rod shaft; 3032. M42 hexagonal thin nut; 3033. Second connecting rod shaft; 3034. M24 hexagonal slotted nut; 304. Gear; 305. Servo motor; 306. Worm gear reducer; 307. Drive frame; 308. Support wheel assembly; 30801. First support wheel; 30802. First end cover; 30803. First support wheel shaft; 30804. First bearing; 30805. Bushing; 30806. M24 flat washer; 30807. M24 spring washer; 30808. M24 hexagonal nut; 30809. Second support wheel; 30810. Second end cover; 30811. Second support wheel shaft; 30812. 1. Second bearing; 30813. M5×12 socket head cap screw; 309. Top wheel assembly; 3091. Top wheel; 3092. Top wheel end cap; 3093. Top wheel bearing; 3094. Top wheel shaft; 3095. Top wheel bushing; 3096. M8 flat washer; 3097. M8 spring washer; 3098. M8 hex nut; 310. Side wheel assembly; 31001. Side wheel shaft; 3 1002, Side wheel bushing; 31003, Side wheel; 31004, M10 flat washer; 31005, M10 spring washer; 31006, M10 hexagonal thin nut; 31007, M6 flat washer; 31008, M6 spring washer; 31009, M6 hexagonal nut; 31010, M6×30 hexagonal bolt; 31011, Side wheel mounting bracket; 311, Limiting plate; 4. Connectors; 5. Power connection assembly; 51. First power connection assembly; 52. Second power connection assembly; 501. Power connection frame; 502. Flexible element; 503. Power connection block; 6. Short circuit board; 701, First coil; 702, Second coil; 703, Third coil; 704, Fourth coil; 705, Fifth coil; 706, Sixth coil; 707, Seventh coil; 708, Eighth coil; 801, First switch; 802, Second switch; 803, Third switch; 804, Fourth switch; 805, Fifth switch; 806, Sixth switch; 807, Seventh switch; 808, Eighth switch; 809, Ninth switch. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. Furthermore, the technical features involved in the various embodiments described below can be combined with each other as long as they do not conflict with each other.

[0031] The present application will now be described in detail with reference to the accompanying drawings and embodiments. Example 1

[0032] like Figure 1 As shown in Embodiment 1 of this application, a crane-type switchgear is provided, including a track 1, a power extension member 2, a crane 3, a connector 4, a power connection component 5, and a short-circuit plate 6. The track 1 serves to orient, support, and position the crane 3, and is reliably connected to the ceiling to ensure secure installation. The power extension members 2 are arranged on several coils connected in series; their number depends on the number of coils connected. One power extension member 2 is provided at the input end of the first coil, and one power extension member 2 is provided at the output end of each coil, extending the distance of the coil to external power. Two cranes 3 are movably arranged on the track 1, providing driving force for the power connection component 5 and positioning it. Two connectors 4 and two power connection components 5 are provided, each connector 4 fixed at both ends to one crane 3 and one power connection component 5, respectively. The connectors 4 reliably fix the crane 3 and the power connection component 5, allowing the crane 3 to move along with the power connection component 5. The power connection component 5, as the core part, plays a crucial role in reliably transmitting large currents. It is positioned on one side of the short-circuit plate 6, with one part remaining in contact with the plate, while the other part contacts or separates from the power connection extension component 2 as the crane 3 moves. When two power connection components 5 contact one power connection extension component 2, the coil between the two contacting extension components 2 is short-circuited. With this configuration, two sets of cranes 3 and two sets of power connection components 5 can achieve the coil short-circuit function that originally required several or even more than ten sets of switches. This not only significantly reduces product costs and solves the problem of high switch costs in existing transmitter tuning circuits, but also improves product reliability due to the reduced number of cranes 3 and power connection components 5 compared to the original number of switches.

[0033] refer to Figure 2 As shown, the track 1 includes an I-shaped profile 101 and a rack 102 disposed on the inner top surface of the profile 101. The profile 101 serves as a support, while the rack 102 assists in the movement and positioning of the overhead crane 3. The rack 102 can be assembled in sections onto the profile 101, and its top end is fixed with hexagonal head bolts.

[0034] refer to Figure 3 As shown, in some embodiments, the overhead crane 3 is composed of a main fixing plate 301, a secondary fixing plate 302, a connecting rod assembly 303, a gear 304, a servo motor 305, a worm gear reducer 306, a drive frame 307, a support wheel assembly 308, a top wheel assembly 309, a side wheel assembly 310, a limiting plate 311, and other structures.

[0035] The main fixing plate 301 and the secondary fixing plate 302 are respectively disposed on both sides of the profile 101 and connected by the connecting rod assembly 303. The main fixing plate 301 and the secondary fixing plate 302 mainly serve to fix various components. In addition to connecting the main fixing plate 301 and the secondary fixing plate 302, the connecting rod assembly 303 can also transmit power to the power connection assembly 5. For example, the connector 4 is fixed to the connecting rod assembly 303 by means of nuts and washers, and the connecting rod assembly 303 drives the connector 4, thereby driving the power connection assembly 5 to move.

[0036] Gear 304 transmits power; servo motor 305 provides power to crane 3, and the servo motor 305 can reliably position crane 3; in addition, worm gear reducer 306 has a self-locking function to prevent crane 3 from moving haphazardly after power failure, and can provide a large transmission ratio in a small size. Specifically, gear 304 can be set on the side of main fixed plate 301 facing profile 101, and gear 304 meshes with rack 102. Servo motor 305 and worm gear reducer 306 are set on the side of main fixed plate 301 away from profile 101. Servo motor 305, worm gear reducer 306 and gear 304 are connected in sequence. Servo motor 305 drives worm gear reducer 306, which in turn drives gear 304 to move. At the same time, gear 304 meshes with rack 102 of track 1. The rotation of gear 304 generates driving force, driving crane 3 to move along track 1. Furthermore, a driver bracket 307 for housing the servo motor driver can be provided on the side of the secondary fixing plate 302 away from the profile 101, enabling precise control of the servo motor 305 via the driver. Additionally, both the main fixing plate 301 and the secondary fixing plate 302 have support wheel sets 308 on the side closest to the profile 101, for contacting the inner bottom surface of the profile 101. The support wheel sets 308 primarily provide overall support for the overhead crane 3. This design provides accurate track 1 guidance and a stable support structure for the movement of the overhead crane 3. The servo motor 305, in conjunction with the worm gear reducer 306, provides reliable power and a self-locking function. The combination of gears 304 and rack 102 ensures accurate positioning of the overhead crane 3 and prevents accidental operation during power outages. Simultaneously, the driver is rationally housed using the driver bracket 307.

[0037] In some embodiments, the secondary fixing plate 302 is provided with a top wheel assembly 309 on the side near the profile 101 for contacting the inner top surface of the profile 101. Both the main fixing plate 301 and the secondary fixing plate 302 are provided with side wheel assemblies 310 on the side near the profile 101 for contacting the inner side surface of the profile 101. The top wheel assembly 309 and the side wheel assembly 310 mainly serve to reduce noise during crane movement and also provide some support. Through this design, the contact between the top wheel assembly 309 and the inner top surface of the profile 101, and the contact between the side wheel assembly 310 and the inner side surface of the profile 101, improves the stability and noise reduction of the crane 3 during movement. Furthermore, the constraints imposed by the various wheel assemblies and the track 1 further ensure that the crane 3 can only move linearly along the track 1.

[0038] With the above configuration, the crane 3 is assembled into a frame consisting of a main fixing plate 301, a secondary fixing plate 302, and a connecting rod assembly 303. The servo motor 305 significantly improves the control precision of the equipment; equipped with an absolute encoder, the servo motor 305 can accurately position the crane 3 without other positioning sensors. The worm gear reducer 306 is self-locking, ensuring that the equipment remains locked even under lateral force and without power failure, preventing other accidents due to power outages. The support wheel assembly 308, side wheel assembly 310, and top wheel assembly 309 each abut against one surface of the profile 101 of the track 1, allowing the crane 3 to move only along the track 1.

[0039] In some embodiments, limiting pieces 311 are provided on the sides of both the main fixing plate 301 and the secondary fixing plate 302, and at least a portion of the limiting piece 311 extends into the inside of the profile 101. The limiting piece 311 serves to prevent the overhead crane 3 from derailing from the track 1 in case of an accident. For example, the limiting piece 311 can lock the overhead crane 3 onto the track 1 in case of an accident such as overturning, preventing it from derailing and improving the safety of the equipment.

[0040] Furthermore, for the support wheel assembly 308, two structures can be selected, namely, a first support wheel assembly and a second support wheel assembly. Each crane can include three sets of first support wheel assemblies and one set of second support wheel assemblies. For example, two sets of first support wheel assemblies are arranged inside the auxiliary fixing plate 302, and one set of first support wheel assemblies and one set of second support wheel assemblies are arranged inside the main fixing plate 301. The second support wheel assembly is located close to the servo motor 305 to avoid interference with the servo motor 305.

[0041] refer to Figure 4In some embodiments, the first support wheel assembly consists of a first support wheel 30801, a first end cap 30802, a first support wheel shaft 30803, a first bearing 30804, a bushing 30805, an M24 flat washer 30806, an M24 spring washer 30807, and an M24 hexagonal nut 30808. The first support wheel shaft 30803 passes through the plate body. The first support wheel 30801 is mounted on one side of the plate body via the first bearing 30804, the bushing 30805, and the first end cap 30802. On the other side of the plate body, the M24 flat washer 30806, the M24 spring washer 30807, and the M24 hexagonal nut 30808 are installed in sequence.

[0042] refer to Figure 5 In some embodiments, the second support wheel assembly consists of a second support wheel 30809, a second end cap 30810, a second support wheel shaft 30811, a second bearing 30812, and an M5×12 socket head cap screw 30813. The second support wheel shaft 30811 passes through the plate body, and the second support wheel 30809 is mounted on one side of the plate body via the second bearing 30812 and the second end cap 30810. The second support wheel shaft 30811 is fixed on the other side of the plate body by the M5×12 socket head cap screw 30813.

[0043] The function of both the first and second support wheel sets is to bear the load weight of the overhead crane 3. The difference between the two is that the first support wheel set has a lower cost, but its first support wheel shaft 30803, M24 flat washer 30806, M24 spring washer 30807 and M24 hexagonal nut 30808 will interfere with the servo motor 305, while the second support wheel set will not interfere. Therefore, the design of the second support wheel set is adopted at the position corresponding to the servo motor 305.

[0044] refer to Figure 6In some embodiments, the side wheel assembly 310 consists of a side wheel axle 31001, a side wheel bushing 31002, a side wheel 31003, an M10 flat washer 31004, an M10 spring washer 31005, an M10 hexagonal thin nut 31006, an M6 flat washer 31007, an M6 spring washer 31008, an M6 hexagonal nut 31009, an M6×30 hexagonal bolt 31010, and a side wheel mounting bracket 31011. The side wheel mounting bracket 31011 is mounted on the plate body using M6×30 hex bolts 31010, M6 flat washers 31007, M6 spring washers 31008, and M6 hex nuts 31009. The side wheel axle 31001 is mounted on the side wheel mounting bracket 31011 using M10 flat washers 31004, M10 spring washers 31005, and M10 thin hex nuts 31006. The side wheel 31003 is mounted on the side wheel axle 31001 using a side wheel bushing 31002. The side wheel 31003 is made of nylon, which is high-strength, self-lubricating, and does not require bearings. It also improves the stability of the overhead crane 3 and reduces its noise.

[0045] refer to Figure 7 In some embodiments, the top wheel assembly 309 comprises a top wheel 3091, a top wheel end cap 3092, a top wheel bearing 3093, a top wheel shaft 3094, a top wheel shaft sleeve 3095, an M8 flat washer 3096, an M8 spring washer 3097, and an M8 hexagonal nut 3098. The top wheel shaft 3094 passes through the plate. The top wheel 3091 is mounted on one side of the plate via the top wheel end cap 3092, the top wheel bearing 3093, and the top wheel shaft sleeve 3095. On the other side of the plate, the M8 flat washer 3096, the M8 spring washer 3097, and the M8 hexagonal nut 3098 are sequentially installed. The top wheel 3091 is made of nylon, which has high strength and can improve the stability of the crane and reduce its noise.

[0046] refer to Figure 8 In some embodiments, the connecting rod assembly 303 comprises a first connecting rod shaft 3031, an M42 hexagonal thin nut 3032, a second connecting rod shaft 3033, and an M24 hexagonal slotted nut 3034. Besides serving to fix the main fixing plate 301 and the secondary fixing plate 302 together, the connecting rod assembly 303, with a certain gap between the M42 hexagonal thin nut 3032 and the second connecting rod shaft 3033, also serves to fix the hoisting load, such as fixing the connecting piece 4.

[0047] refer to Figure 9In some embodiments, the power connection assembly 5 includes a power connection frame 501 and a plurality of power connection blocks 503 floating on the power connection frame 501 via elastic members 502. The power connection frame 501 connects the various components of the power connection assembly 5, and the elastic members 502 ensure reliable contact between the power connection blocks 503 and the power connection extension member 2 or the shorting plate 6. The power connection blocks 503 also ensure reliable contact with the power connection extension member 2 or the shorting plate 6. Further, the power connection frame 501 is fixedly connected to the connecting member 4, and the power connection blocks 503 are respectively used to contact the power connection extension member 2 and the shorting plate 6. The power connection frame 501 can be generally U-shaped, with two L-shaped connecting pieces welded to the top. The two L-shaped connecting pieces clamp the end of the connecting member 4, and then it can be fixed by bolts or welding. The elastic element 502 corresponds one-to-one with the grounding block 503. One portion of the grounding blocks 503 are positioned on one side of the inverted U-shaped grounding frame 501 for contact with the shorting plate 6; the other portion are positioned opposite each other within the inverted U-shaped space of the grounding frame 501 for contact with the grounding extension element 2. Through this design, the grounding blocks 503 are floatingly positioned on the grounding frame 501, and their positions can be adaptively adjusted under the action of the elastic element 502, ensuring full contact with the grounding extension element 2 and the shorting plate 6, improving electrical conduction, and adapting to the positional tolerances and surface unevenness of the grounding extension element 2 and the shorting plate 6, making the circuit connection more reliable.

[0048] In some embodiments, the grounding blocks 503 are provided in three groups of three. The first group of grounding blocks 503 is positioned facing the short-circuit plate 6 and remains in contact with the short-circuit plate 6 under the action of the elastic member 502. The second and third groups of grounding blocks 503 are positioned opposite each other. When the grounding assembly 5 moves to the position corresponding to the grounding extension member 2, the second and third groups of grounding blocks 503 are clamped on both sides of the grounding extension member 2 under the action of the elastic member 502. Furthermore, one side of each grounding block 503 has rounded chamfers on both sides, and the side of the second and third groups of grounding blocks 503 facing each other has the rounded chamfers. The above scheme ensures that the power connection component 5 maintains continuous and stable contact with the short-circuit board 6. At the same time, when moving to the corresponding position of the power connection extension 2, reliable contact with the power connection extension 2 is achieved through the clamping of the two sets of power connection blocks 503, which ensures the stability and reliability of the circuit connection and is conducive to better realizing the short-circuit function of the coil. Furthermore, the arc-shaped chamfer design of the power connection block 503 makes the second and third sets of power connection blocks 503 contact the power connection extension 2 more smoothly, reducing resistance and wear during contact, and improving the service life and contact stability of the power connection component 5.

[0049] In some embodiments, the power connection extension 2, the power connection frame 501, the elastic element 502, the power connection block 503, and the short-circuit plate 6 are all made of conductive materials. For example, the power connection extension 2 can be made of copper busbar to ensure good current transmission; the power connection frame 501 and the power connection block 503 can be made of copper to ensure reliable transmission of large currents; the elastic element 502 can be made of copper compression spring to transmit large currents; the short-circuit plate 6 can be made of copper plate fixed to a wall or other reliable support, with a large cross-sectional area to ensure the transmission of large currents. In addition, to increase the conductivity of the power connection block 503, a flying wire can be directly run between the power connection block 503 and the terminal frame 501. In this case, the material of the elastic element 502 is not limited. Through the above solutions, a complete conductive path can be formed between the power connection assembly 5, the power connection extension 2, and the short-circuit plate 6, allowing current to be conducted smoothly, thereby ensuring the normal operation of the overhead crane switchgear for coil short-circuiting.

[0050] In some embodiments, the connector 4 is made of insulating material. One end of the connector 4 is fixed to the overhead crane 3, and the other end is fixed to the power connection assembly 5. The connector 4 can be made of epoxy phenolic fiberglass cloth or other robust insulating materials. By using the above solution to connect the overhead crane 3 and the power connection assembly 5 with the insulating connector 4, current can be prevented from being conducted between the overhead crane 3 and the power connection assembly 5, ensuring the normal operation of the overhead crane. Example 2

[0051] Based on the crane-type switch device provided in Embodiment 1, this Embodiment 2 provides a switch circuit applied to the crane-type switch device of Embodiment 1.

[0052] refer to Figure 10 In a traditional circuit design, taking eight coils as an example, namely coil 701, coil 702, coil 703, coil 704, coil 705, coil 706, coil 707, and coil 708, the eight coils are connected in series. The number of switches depends on the number of coils connected to each coil. There is one switch at the input terminal of the first coil, and one switch at the output terminal of each coil, namely switch 801, switch 802, switch 803, switch 804, switch 805, switch 806, switch 807, switch 808, and switch 809. Closing any number of switches will short-circuit all coils between the two outermost switches in the closed circuit.

[0053] The above solution requires too many switches, making it too costly. Therefore, refer to... Figure 11This application provides a switching circuit, including a short-circuit board 6, a first power-connecting component 51, a second power-connecting component 52, and a plurality of coils arranged in series. Each coil has contact points at both ends. A portion of the first power-connecting component 51 and the second power-connecting component 52 maintains contact with the short-circuit board 6 and is movably disposed therein. The other portion of the first power-connecting component 51 and the second power-connecting component 52 contacts or separates from the contact points of the coils by movement. Again, taking the above eight coils as an example, refer to... Figure 12 When the contact points between the first energizing component 51 and the first coil 701 and the second coil 702 make contact, and the contact points between the second energizing component 52 and the fourth coil 704 and the fifth coil 705 make contact, then the second coil 702, the third coil 703, and the fourth coil 704 will be short-circuited. Similarly, short-circuiting any one or more coils can be achieved by moving the first energizing component 51 and the second energizing component 52. Through this scheme, utilizing the characteristics of the crane-type switching device, the effect of short-circuiting any selected coil segment can be achieved by controlling the movement of only the first energizing component 51 and the second energizing component 52 in the switching circuit. This eliminates the need for a switch for each coil, significantly reducing costs and improving the reliability and flexibility of the circuit system.

[0054] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A crane-type switchgear, characterized in that, It includes a track (1) and a power extension member (2) set on a plurality of coils connected in series; two movable cranes (3) are set on the track (1), each crane (3) is connected to a power connection component (5) through a connector (4), a short circuit board (6) is set on one side of the power connection component (5), and the power extension member (2) is provided in multiple and is respectively set at the input end of the first coil in the series and the output end of each coil; One part of the power connection component (5) remains in contact with the short-circuit plate (6), and the other part of the power connection component (5) contacts or separates from the power connection extension component (2) as the crane (3) moves; when two power connection components (5) respectively contact one power connection extension component (2), the coil between the two power connection extension components (2) that are contacted is short-circuited.

2. The crane-type switchgear according to claim 1, characterized in that, The power connection assembly (5) includes a power connection frame (501) and a plurality of power connection blocks (503) floating on the power connection frame (501) via an elastic member (502). The power connection frame (501) is fixedly connected to the connector (4), and the power connection blocks (503) are respectively used to contact the power connection extension member (2) and the short circuit board (6).

3. The crane-type switchgear according to claim 2, characterized in that, The power-connecting blocks (503) are provided in three sets. The first set of power-connecting blocks (503) is arranged facing the short-circuit plate (6), and the first set of power-connecting blocks (503) is in contact with the short-circuit plate (6) under the action of the elastic member (502). The second set of power-connecting blocks (503) and the third set of power-connecting blocks (503) are arranged opposite to each other. When the power-connecting assembly (5) moves to the position corresponding to the power-connecting extension member (2), the second set of power-connecting blocks (503) and the third set of power-connecting blocks (503) are clamped on both sides of the power-connecting extension member (2) under the action of the elastic member (502).

4. The crane-type switchgear according to claim 3, characterized in that, The two sides of one side of the grounding block (503) are provided with arc-shaped chamfers, and the sides of the second group of grounding blocks (503) and the third group of grounding blocks (503) facing each other are the sides provided with arc-shaped chamfers.

5. The crane-type switchgear according to claim 2, characterized in that, The power extension member (2), the power frame (501), the elastic member (502), the power block (503), and the short circuit board (6) are all made of conductive materials.

6. The crane-type switchgear according to claim 1, characterized in that, The connector (4) is made of insulating material. One end of the connector (4) is fixed to the overhead crane (3), and the other end of the connector (4) is fixed to the power connection assembly (5).

7. The crane-type switchgear according to claim 1, characterized in that, The track (1) includes an I-shaped profile (101) and a rack (102) disposed on the inner top surface of the profile (101); the crane (3) includes a main fixing plate (301) and a secondary fixing plate (302) respectively disposed on both sides of the profile (101), the main fixing plate (301) and the secondary fixing plate (302) being connected by a connecting rod assembly (303); a gear (304) that meshes with the rack (102) is disposed on the side of the main fixing plate (301) facing the profile (101), and the main fixing plate (301) is away from the profile. A servo motor (305) and a worm gear reducer (306) are provided on one side of (101), and the servo motor (305), the worm gear reducer (306) and the gear (304) are connected in sequence; a driver frame (307) for setting the servo motor driver is provided on the side of the secondary fixing plate (302) away from the profile (101), and a support wheel set (308) for contacting the inner bottom surface of the profile (101) is provided on the side of the main fixing plate (301) and the secondary fixing plate (302) close to the profile (101).

8. The crane-type switchgear according to claim 7, characterized in that, The secondary fixing plate (302) is provided with a top wheel assembly (309) for contacting the inner top surface of the profile (101) on the side near the profile (101), and the main fixing plate (301) and the secondary fixing plate (302) are both provided with a side wheel assembly (310) for contacting the inner side surface of the profile (101) on the side near the profile (101).

9. The crane-type switchgear according to claim 7, characterized in that, Both the main fixing plate (301) and the secondary fixing plate (302) are provided with limiting pieces (311) on their sides, and at least a portion of the limiting pieces (311) extends into the inside of the profile (101).

10. A switching circuit, applied to the crane-type switching device according to any one of claims 1-9, characterized in that, It includes a short circuit board (6), a first power connection component (51), a second power connection component (52), and multiple coils connected in series. Each coil has contact points at both ends. A portion of the first power connection component (51) and the second power connection component (52) are in contact with the short circuit board (6) and are movable. The other portion of the first power connection component (51) and the second power connection component (52) are in contact with or separated from the contact points of the coils by movement.

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