A transfer trolley for a switchgear cubicle handcart

Abstract

The utility model discloses a transfer trolley for middle -position switch cabinet handcart, and aims at solving the problem of poor structural stability and complicated use of the existing transfer trolley. The transfer trolley of the utility model includes base, tray, hinge shaft, adjusting assembly, track board and connecting pin, the base is rotatably connected with the tray through the hinge shaft, the hinge shaft is arranged at the back of the base, the adjusting assembly is arranged at the front of the base, the adjusting assembly is connected with the bottom of the tray, the adjusting assembly adjusts the front side of the tray to go up and down, the track board is connected with the top of the tray, the connecting pin is connected with the bottom of the front side of the track board, and the connecting pin is matched with the opening on the switch cabinet framework. The adjusting assembly can conveniently adjust the height of the front side of the tray, make the track board quickly align with the switch cabinet, and tray position does not need manual labor to adjust; the matching design of the connecting pin and the opening of the switch cabinet framework makes the positioning operation of the transfer trolley and the switch cabinet simple, and only needs to be aligned to be locked, which greatly improves the operation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary tools for power equipment, and in particular to a transfer vehicle for a central switchgear trolley. Background Technology

[0002] 12kV medium-voltage switchgear is a core piece of equipment in power systems used for power distribution, control, and protection, and is widely used in substations, industrial and mining enterprises, commercial buildings, and other fields. Medium-voltage switchgear is the main type of 12kV switchgear. Before commissioning and during maintenance, various functional switchgear such as circuit breaker trucks and isolating trucks are required for transfer.

[0003] Existing transfer carts have a horizontal hook at the center of the front end of the tray. The hook mates with a hole on the cabinet to connect the transfer cart to the cabinet. To ensure smooth connection between the tray and the cabinet and for the trolley to move in and out of the switchgear, a thin plate extends from the front of the transfer cart tray below the guide rail that mates with the functional trolley, and fits with the bottom of the cabinet guide rail with a gap. The disadvantage of this structure is that the horizontal hook is separate from the extended thin plate, resulting in a weak connection. The thin plate is also not strong enough. When the trolley is heavy, the thin plate may deform, making it difficult to move in and out of the switchgear, and the trolley may easily slip off. Utility Model Content

[0004] (a) Purpose of the utility model The purpose of this utility model is to provide a transfer vehicle for a centrally located switchgear trolley, aiming to solve the problems of poor structural stability, cumbersome use, and low safety and reliability of existing transfer vehicles.

[0005] (II) Technical Solution To solve the above problems, this utility model provides a transfer cart for a central switch cabinet trolley, including a base, a tray, a hinge shaft, an adjustment assembly, a track plate, and a connecting pin; The base and the tray are rotatably connected by the hinge shaft, which is located on the rear side of the base. The adjustment component is located on the front side of the base and is connected to the bottom of the tray. The adjustment component adjusts the front side of the tray for lifting and lowering. The track plate is connected to the top of the tray, and the connecting pin is connected to the bottom of the front side of the track plate. The connecting pin is adapted to the opening on the switch cabinet frame.

[0006] Preferably, the transfer vehicle is provided with two adjustment components and two track plates. The two adjustment components are symmetrically arranged at both ends of the front side of the base, and the two track plates are arranged on both sides of the top of the tray and perpendicular to the hinge axis.

[0007] Preferably, an operating shaft is rotatably connected between the two adjustment components. The operating shaft is parallel to the hinge shaft. The adjustment component includes a mounting plate, a cam, and an adjustment handle. The mounting plate is fixedly connected to the front side of the base. The operating shaft is rotatably connected to the mounting plate. The cam is sleeved on the operating shaft. The adjustment handle is perpendicularly connected to the operating shaft.

[0008] Preferably, the adjustment assembly further includes a first limiting rod and a second limiting rod. The first limiting rod passes vertically through the operating shaft and is fixedly connected to the operating shaft. The second limiting rod is perpendicular to the mounting plate and is fixedly connected. The second limiting rod is disposed on the outer periphery of the operating shaft in the rotation direction. When the adjustment handle is rotated to the limit position, the first limiting rod abuts against the second limiting rod.

[0009] Preferably, two second limiting rods are vertically arranged on the mounting plate, and the two second limiting rods are symmetrically arranged on the outer periphery of the operating shaft in the rotation direction. When the adjusting handle is rotated to the limit position, the two ends of the first limiting rod abut against the two second limiting rods respectively.

[0010] Preferably, a crossbeam is provided at the bottom of the tray, the crossbeam is located above the operating shaft, a limiting bend is fixedly provided on the crossbeam, the limiting bend forms a movable space, and the operating shaft passes through the movable space.

[0011] Preferably, the adjustment assembly further includes a spring, a connecting rod is provided on the side of the adjustment handle, one end of the spring is fixedly connected to the crossbeam, and the other end of the spring is connected to the connecting rod.

[0012] Preferably, the connecting rod is provided with a connecting groove, and the end of the spring is provided with a hook, which is disposed in the connecting groove.

[0013] Preferably, a baffle is fixedly provided on the top of the tray, and the baffle is located on the rear side of the track plate.

[0014] Preferably, the base is provided with multiple casters at its bottom.

[0015] (III) Beneficial Effects The above-mentioned technical solution of this utility model has the following beneficial technical effects: 1. The base provides stable support for the entire structure, and the rotating connection of the hinge shaft ensures a stable pallet lifting trajectory, avoiding component deformation caused by rigid connections. This reduces rotational friction, making pallet lifting smoother and improving structural durability.

[0016] 2. The adjustment component allows for easy adjustment of the front height of the tray, enabling the track plate to quickly align with the switchgear without requiring manual effort to adjust the tray position; the matching design of the connecting pin and the opening of the switchgear frame makes the positioning operation of the transfer cart and the switchgear simple, requiring only alignment to lock, greatly improving operational efficiency.

[0017] 3. The track plate provides precise guidance to prevent the trolley from deviating, jamming, or slipping during movement; the connecting pins ensure a reliable connection with the switchgear frame, preventing relative movement between the transfer trolley and the switchgear. This ensures the safety of trolley transport from both guiding and fixing perspectives, reducing the risk of equipment damage and personnel injury. Attached Figure Description

[0018] Figure 1 This is a side view of a transfer vehicle provided by this utility model; Figure 2 This is a side cross-sectional view of a transfer vehicle provided by this utility model; Figure 3 yes Figure 2 A schematic enlarged view of part A in the middle; Figure 4 This is a schematic diagram of the rear structure of a transfer vehicle according to the present utility model; Figure 5 yes Figure 4 A schematic enlarged view of part B in the middle; Figure 6 This is a schematic diagram of the structure of the adjusting component with the spring installed according to the present invention; Figure 7 This is a top view of a transfer vehicle provided by this utility model; Figure 8 yes Figure 7 A schematic enlarged view of a portion of C in the middle; Figure 9 This is a schematic diagram of the overall structure of a transfer vehicle provided by this utility model.

[0019] Figure label: 1. Base; 11. Casters; 2. Pallet; 21. Crossbeam; 22. Limiting bend; 23. Baffle; 3. Hinge pin; 4. Adjustment assembly; 41. Mounting plate; 42. Cam; 43. Adjustment handle; 44. First limit rod; 45. Second limit rod; 46. Spring; 47. Connecting rod; 47a. Connecting groove; 5. Track slab; 6. Connecting pin; 7. Operating axis. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0021] The accompanying drawings show schematic diagrams of layer structures according to embodiments of the present invention. These drawings are not to scale, and some details have been enlarged for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0022] Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0023] In the description of this utility model, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] Combination Figures 1 to 9 This utility model provides a transfer cart for a centrally located switchgear trolley, characterized in that the transfer cart includes a base 1, a tray 2, a hinge shaft 3, an adjustment component 4, a track plate 5, and a connecting pin 6; the base 1 and the tray 2 are rotatably connected by the hinge shaft 3, which is located on the rear side of the base 1; the adjustment component 4 is located on the front side of the base 1 and is connected to the bottom of the tray 2, adjusting the front side of the tray 2 for lifting and lowering; the track plate 5 is connected to the top of the tray 2; the connecting pin 6 is connected to the bottom of the front side of the track plate 5 and is adapted to the opening on the switchgear frame.

[0025] Specifically, base 1 serves as the basic support structure for the transfer cart, bearing the weight of tray 2, the handcart, and other components, and providing an installation benchmark for each component. Tray 2 directly supports the centrally located switchgear handcart and is the platform for placing the handcart; it must have sufficient strength to withstand the weight of the handcart. Hinge shaft 3 enables the rotational connection between base 1 and tray 2, providing a fulcrum for the front lifting and lowering of tray 2, allowing tray 2 to rotate around it. Adjustment component 4 connects the front of base 1 to the bottom of tray 2, driving the front of tray 2 to lift and lower through its own movement to adapt to the height of the switchgear, facilitating the loading and unloading of the handcart. Track plate 5 is located on top of tray 2, providing guidance for the movement of the handcart between tray 2 and the switchgear, ensuring accurate movement path of the handcart. Connecting pin 6 connects to the bottom front of track plate 5, adapting to the opening in the switchgear frame, achieving a positioning connection between the transfer cart and the switchgear frame, preventing relative displacement.

[0026] The base 1 and tray 2 are rotatably connected via the rear hinge shaft 3. When the adjusting component 4 acts on the bottom of the tray 2, the front side of the tray 2 moves up and down with the hinge shaft 3 as the fulcrum. The track plate 5 guides the trolley to move between the tray 2 and the switch cabinet; when it is necessary to fix the position of the transfer trolley and the switch cabinet, the connecting pin 6 is inserted into the opening in the switch cabinet frame to complete the positioning. It should be noted that the front and rear sides here specifically refer to the position of the transfer trolley relative to the switch cabinet; the side closer to the switch cabinet is the front side, and the other side is the rear side. Figure 1 As shown in the figure, the right side of the transfer vehicle is the front side, and the left side of the transfer vehicle is the rear side.

[0027] With this setup, base 1 provides stable support for the entire structure, and the rotating connection of hinge shaft 3 ensures stable lifting trajectory of tray 2, avoiding component deformation caused by rigid connections. For example, hinge shaft 3 uses bearing connection, which reduces rotational friction, making tray 2 lift and lower more smoothly, while also improving structural durability and preventing damage over long-term use. Adjustment component 4 allows for convenient adjustment of the front height of tray 2, enabling track plate 5 to quickly align with the switchgear without requiring manual adjustment of tray 2's position. The matching design of connecting pin 6 with the opening in the switchgear frame simplifies the positioning operation of the transfer cart and switchgear; simply align and lock, significantly improving operational efficiency. Track plate 5 provides precise guidance, preventing the trolley from shifting, jamming, or slipping during movement. The reliable connection of connecting pin 6 with the switchgear frame prevents relative movement between the transfer cart and switchgear, ensuring safe trolley transport from both guiding and fixing perspectives, reducing the risk of equipment damage and personnel injury.

[0028] It should be noted that the specific number of adjusting components 4 and track plates 5 is not limited here; they can be single or multiple, as long as they can achieve the lifting and lowering adjustment of the front side of the tray 2 and the quick connection and separation of the transfer cart from the switch cabinet frame. For example, one adjusting component 4 can be set, located on one side or in the middle of the bottom of the tray 2, or multiple adjusting components 4 can be set, evenly distributed on the same straight line at the bottom of the tray 2, with this straight line perpendicular to the track plate 5, to achieve smooth lifting and lowering of the front side of the tray 2. One or more track plates 5 can be set on the top of the tray 2, perpendicular to the hinge axis 3, and set at the center of the top surface of the tray 2 or evenly distributed on the top of the tray 2.

[0029] In a preferred embodiment, the transfer vehicle is provided with two adjustment components 4 and two track plates 5. The two adjustment components 4 are symmetrically arranged at both ends of the front side of the base 1, and the two track plates 5 are arranged on both sides of the top of the tray 2 and perpendicular to the hinge axis 3.

[0030] Specifically, two adjusting components 4 are symmetrically arranged at both ends of the front side of the base 1, so that the front ends of the tray 2 are simultaneously subjected to force, making the lifting and lowering more stable; two track plates 5 are arranged on both sides of the top of the tray 2 and perpendicular to the hinge axis 3, guiding the handcart from both sides and enhancing the guiding effect. During operation, the two adjusting components 4 move synchronously, driving the front ends of the tray 2 to lift and lower synchronously, ensuring the smooth lifting and lowering of the front of the tray 2, so that the two track plates 5 are precisely aligned with the switch cabinet guide rails at the same time; under the common guidance of the two track plates 5, the handcart moves smoothly in a direction perpendicular to the hinge axis 3.

[0031] With this configuration, the two adjusting components 4 are symmetrically distributed, ensuring uniform driving force at both ends of the front side of the tray 2. This makes the tray 2 rotate more smoothly around the hinge axis 3, preventing tilting where one end is higher than the other. For example, even if the trolley's position on the tray 2 is slightly off, the symmetrical adjusting components 4 can ensure smooth lifting and lowering of the tray 2, preventing the trolley from sliding due to the tray 2's tilt. Two track plates 5 guide the trolley from opposite sides. Compared to a single track plate 5, this more effectively limits the lateral displacement of the trolley, ensuring the trolley moves strictly along the track plate 5 and achieves more precise docking with the switchgear rails. Whether pulling out the trolley or pushing it into the switchgear, the trolley's movement path is accurate, reducing operational resistance. The symmetrical structure ensures uniform force distribution on the entire transfer trolley, extending the service life of its components.

[0032] In a preferred embodiment, an operating shaft 7 is rotatably connected between the two adjusting components 4. The operating shaft 7 is parallel to the hinge shaft 3. The adjusting component 4 includes a mounting plate 41, a cam 42, and an adjusting handle 43. The mounting plate 41 is fixedly connected to the front side of the base 1. The operating shaft 7 is rotatably connected to the mounting plate 41. The cam 42 is sleeved on the operating shaft 7. The adjusting handle 43 is perpendicularly connected to the operating shaft 7.

[0033] Specifically, the operating shaft 7 connects to two adjusting components 4, enabling them to move synchronously. The mounting plate 41 fixes the adjusting components 4 to the front of the base 1, providing a mounting base for the operating shaft 7 and cam 42. The cam 42 is fitted onto the operating shaft 7, and through an eccentric structure, it converts the rotation of the operating shaft 7 into a thrust on the bottom of the tray 2, achieving the lifting and lowering of the front side of the tray 2. The adjusting handle 43 is vertically connected to the operating shaft 7, providing a point of force for the operator to easily rotate the operating shaft 7. In use, the operator rotates the adjusting handle 43, causing the operating shaft 7 to rotate, and the cam 42 on the operating shaft 7 rotates synchronously. Due to the eccentric nature of the cam 42, its contact point with the bottom of the tray 2 shifts vertically during rotation, pushing the bottom of the tray 2, causing the front side of the tray 2 to lift and lower around the hinge shaft 3. Since the operating shaft 7 connects to two adjusting components 4, the two cams 42 rotate synchronously, ensuring that both ends of the front side of the tray 2 lift and lower synchronously.

[0034] With this setup, the operating shaft 7 connects to two adjusting components 4, simultaneously driving two cams 42 to move synchronously, achieving synchronized lifting and lowering of both ends of the front side of the tray 2. This provides high transmission efficiency and avoids the cumbersome and asynchronous problems associated with separate adjustments. The eccentric structure of the cams 42 efficiently converts rotation into lifting motion of the tray 2, and the contact force between the cams 42 and the bottom of the tray 2 is uniform, allowing for precise control of the tray 2's lifting height. The specific size and structure of the cams 42 are not limited here; different cam profiles, such as involutes, arcs, and other eccentric shapes, can be adapted to different lifting strokes, enhancing adjustment flexibility. The adjusting handle 43 is vertically connected to the operating shaft 7 to form a lever structure, allowing the operator to rotate the operating shaft 7 with minimal force, reducing operational difficulty. Even when the tray 2 is carrying a heavy handcart, its height can be easily adjusted, improving operational convenience and comfort.

[0035] In a preferred embodiment, the adjustment assembly 4 further includes a first limiting rod 44 and a second limiting rod 45. The first limiting rod 44 passes vertically through the operating shaft 7 and is fixedly connected to the operating shaft 7. The second limiting rod 45 is perpendicular to and fixedly connected to the mounting plate 41. The second limiting rod 45 is located on the outer periphery of the operating shaft 7 in the direction of rotation. When the adjustment handle 43 is rotated to the limit position, the first limiting rod 44 and the second limiting rod 45 abut against each other.

[0036] Specifically, the first limiting rod 44 is fixed to the operating shaft 7 and rotates synchronously with the operating shaft 7; the second limiting rod 45 is fixed to the mounting plate 41 and located on the outer periphery of the operating shaft 7 in the direction of rotation. When the adjusting handle 43 is rotated to its limit position, the first limiting rod 44 and the second limiting rod 45 abut against each other, limiting the rotation angle of the operating shaft 7 and preventing the cam 42 from rotating excessively and causing the tray 2 to rise or fall excessively. When the operator rotates the adjusting handle 43, the operating shaft 7 drives the first limiting rod 44 to rotate; when the first limiting rod 44 contacts the second limiting rod 45, the operating shaft 7 can no longer rotate. At this time, the cam 42 rotates to the preset limit position, and the front of the tray 2 rises or falls to its maximum height, avoiding damage to components or affecting docking due to excessive operation.

[0037] This design prevents operator error or excessive force from damaging the adjustment component 4, avoids rigid collisions between the cam 42 and the bottom of the tray 2 or other components due to excessive rotation, protects the cam 42, operating shaft 7, and other components, and extends the service life of the adjustment component 4. The first limit rod 44 and the second limit rod 45 abut against each other, precisely controlling the extreme lifting position of the front side of the tray 2, ensuring that the tray 2 reaches the preset height with each lift, guaranteeing the alignment accuracy between the track plate 5 and the switch cabinet guide rail, eliminating the need for visual judgment by the operator, and improving the accuracy and consistency of adjustment.

[0038] In a preferred embodiment, two second limiting rods 45 are vertically arranged on the mounting plate 41. The two second limiting rods 45 are symmetrically arranged on the outer periphery of the operating shaft 7 in the rotation direction. When the adjusting handle 43 is rotated to the limit position, the two ends of the first limiting rod 44 abut against the two second limiting rods 45 respectively.

[0039] Specifically, two second limiting rods 45 are symmetrically arranged on the outer periphery of the operating shaft 7 in the direction of rotation. When the adjusting handle 43 is rotated to its limit position, the two ends of the first limiting rod 44 abut against the two second limiting rods 45 respectively, limiting the first limiting rod 44 from both sides, thereby enhancing the limiting stability and symmetry. When the operating shaft 7 rotates, the first limiting rod 44 rotates with it; when it rotates to its limit position, the two ends of the first limiting rod 44 simultaneously abut against the two symmetrical second limiting rods 45, limiting the rotation angle of the operating shaft 7, so that the operating shaft 7 stops rotating under symmetrical limiting force, ensuring that the forces on both sides of the cam 42 are balanced.

[0040] With this configuration, the two second limit rods 45 limit the first limit rod 44 from both sides. Compared to a single second limit rod 45, the first limit rod 44 experiences more even force during limiting, preventing the operating shaft 7 from skewing or jamming due to unilateral limiting, thus making the limiting action more stable and reliable. For example, after long-term frequent operation, unilateral limiting is prone to reduced accuracy due to wear, while symmetrical limiting on both sides can effectively avoid this, maintaining the accuracy of the limiting. The symmetrical limiting structure ensures that when the operating shaft 7 rotates to its limit position, the limiting forces on both sides are balanced, preventing the operating shaft 7 from generating additional bending moment due to unilateral force, protecting the rotational connection structure between the operating shaft 7 and the mounting plate 41, and extending the service life of the components. The operating shaft 7 connects to two adjustment components 4, and the symmetrical limiting on both sides ensures that the rotation angle of the operating shaft 7 is consistent, making the rotation angle of the two cams 42 exactly the same, ensuring that the lifting height of the two ends of the front side of the tray 2 is consistent, further improving the smoothness of the lifting of the tray 2 and the accuracy of the docking with the track plate 5.

[0041] In a preferred embodiment, a crossbeam 21 is provided at the bottom of the tray 2, the crossbeam 21 is located above the operating shaft 7, and a limiting bending plate 22 is fixedly provided on the crossbeam 21, the limiting bending plate 22 forming a movable space, through which the operating shaft 7 passes.

[0042] Specifically, the bottom of the tray 2 is equipped with a sturdy crossbeam 21 to increase rigidity. A limiting plate 22 is fixed to the crossbeam 21; this plate is typically a bent steel plate, its shape forming a movable space. The operating shaft 7 passes through this movable space. The limiting plate 22 does not rotate with the operating shaft 7, but the upper and lower walls of its movable space contact the rotating operating shaft 7, thereby restricting the range of motion of the operating shaft 7. It should be noted that, as... Figure 3 As shown, an opening is provided in the upper left corner of the movable space, near the top corner of the tray 2 and the base 1, to ensure a limiting effect during use. Simultaneously, during disassembly, the operating shaft 7 can be moved out of the movable space through the opening, enabling quick disassembly of the structure. Furthermore, the movable space is as follows... Figure 3 The position shown allows the operating axis 7 to move within the available space, while the available space also limits the range of motion of the operating axis 7, allowing the operating axis 7 to move within a limited space, and also limiting the lifting range of the tray 2.

[0043] This design allows the operating space to guide and limit the movement of the passing operating shaft 7. It ensures that the pallet 2 moves only along a predetermined trajectory during lifting and lowering, preventing any unnecessary lateral swaying or forward / backward movement. This increases the rigidity and stability of the equipment during operation, ensuring that the connecting pin 6 remains aligned with the target during lifting and lowering, thus improving docking accuracy.

[0044] In a preferred embodiment, the adjusting assembly 4 further includes a spring 46, and a connecting rod 47 is provided on the side of the adjusting handle 43. One end of the spring 46 is fixedly connected to the crossbeam 21, and the other end of the spring 46 is connected to the connecting rod 47.

[0045] Specifically, spring 46 connects the crossbeam 21 to the connecting rod 47 on the adjusting handle 43. When the adjusting handle 43 is rotated to raise the front of the tray 2, spring 46 generates tension. When the force on the adjusting handle 43 is released, spring 46 drives the adjusting handle 43 to rotate in the opposite direction, causing the front of the tray 2 to automatically return to its original position. When the operator rotates the adjusting handle 43 to raise the front of the tray 2, spring 46 is stretched and stores elastic potential energy. After releasing the adjusting handle 43, the elastic potential energy of spring 46 is converted into tension, pulling the connecting rod 47, which in turn drives the adjusting handle 43, the operating shaft 7, and the cam 42 to rotate in the opposite direction. Under the tension of spring 46 and its own weight, the front of the tray 2 descends and returns to its original position.

[0046] With this design, the automatic reset function of spring 46 eliminates the need for operators to manually turn the adjusting handle 43 back; simply releasing it automatically lowers and resets the front of tray 2, simplifying the operation and improving efficiency. This is especially beneficial during frequent loading and unloading of handcarts, saving significant time and effort. The stable and continuous reset force of spring 46 ensures that the front of tray 2 accurately resets to its initial position each time, guaranteeing the alignment accuracy between the connecting pin 6 and the opening in the switchgear frame. The tension of spring 46 keeps the adjusting assembly 4 stable in non-operating states, preventing the adjusting handle 43 from rotating due to vibration, thus preventing accidental raising or lowering of the front of tray 2, protecting components such as tray 2 and track plate 5, and avoiding the risk of handcart slippage due to accidental raising or lowering.

[0047] In a preferred embodiment, the connecting rod 47 is provided with a connecting groove 47a, and the end of the spring 46 is provided with a hook, which is disposed in the connecting groove 47a.

[0048] Specifically, the connecting groove 47a on the connecting rod 47 accommodates the hook at the end of the spring 46, enabling a detachable connection between the spring 46 and the connecting rod 47, facilitating the installation, replacement, and maintenance of the spring 46. When installing the spring 46, simply hook the hook at the end of the spring 46 into the connecting groove 47a of the connecting rod 47 to complete the connection; when replacing the spring 46, simply remove the hook. The operation is simple and quick.

[0049] This detachable connection makes the installation and replacement of spring 46 more convenient, eliminating the need for complex tools or large-scale disassembly of the transfer vehicle, thus reducing maintenance difficulty and time costs. For example, when the elasticity of spring 46 decreases, a new spring 46 can be quickly replaced to ensure the normal operation of the transfer vehicle. The connecting slot 47a provides a flexible installation position for the connection of spring 46, allowing the hook position to be adjusted as needed to adapt to different spring 46 tension requirements, enhancing the adaptability of the adjustment component 4. The connection method between the hook and the connecting slot 47a means that the connection between spring 46 and connecting rod 47 is not overly restricted by the specific structure of spring 46; as long as the end of spring 46 has a matching hook, it can be connected, improving the versatility of spring 46 and making it easier for users to select the appropriate spring 46.

[0050] In a preferred embodiment, a baffle 23 is fixedly provided on the top of the tray 2, and the baffle 23 is located on the rear side of the track plate 5.

[0051] Specifically, baffle 23 is fixed to the rear top of pallet 2 to restrict the rearward displacement of the handcart on pallet 2 and prevent the handcart from sliding off the rear side of pallet 2. When the handcart moves along the track plate 5 onto pallet 2, the rear side of the handcart contacts baffle 23, which prevents the handcart from moving further backward and confines the handcart within the effective load-bearing area of ​​pallet 2.

[0052] With this design, baffle 23 provides a rearward limit for the handcart, preventing it from slipping off the rear of pallet 2 due to accidental collisions or the inertia of the transfer cart, thus further enhancing the safety of the handcart on pallet 2. For example, if the transfer cart encounters bumps during movement, baffle 23 can effectively prevent the handcart from sliding backward, preventing accidents. Baffle 23 can also serve as an indicator that the handcart is in position on pallet 2. When the rear of the handcart contacts baffle 23, the operator can immediately know that the handcart has fully entered the load-bearing area without needing other methods to determine its position, improving operational convenience and accuracy. Baffle 23 can also protect the rear top components of pallet 2, preventing them from being damaged by collisions during handcart movement, and extending the service life of pallet 2 and track 5.

[0053] In an optional configuration, baffle 23 is provided with a square locking hole, which cooperates with the locking tongue on the functional handcart chassis to limit the handcart's movement in all directions, thus meeting the transfer requirements.

[0054] In a preferred embodiment, the base 1 is provided with a plurality of casters 11 at its bottom.

[0055] Specifically, the casters 11 are located at the bottom of the base 1, enabling the transfer cart to move as a whole and allowing for flexible transport of the handcart. When the operator pushes the transfer cart, the casters 11 can rotate in any direction in the horizontal plane, moving the transfer cart in the desired direction to complete the handcart transfer.

[0056] This design allows the casters 11 to maneuver flexibly in confined spaces, adapting to complex environments such as power plant rooms. This facilitates the transfer of the trolley to designated locations without frequent adjustments or sharp turns, improving mobility. Multiple casters 11, such as four distributed at the bottom of the base 1, evenly distribute the weight of the transfer cart and trolley, making the cart move more smoothly and reducing swaying. Furthermore, the caster 11 structure, such as using wear-resistant rubber wheels, ensures smooth rotation even under heavy loads, enhancing stability.

[0057] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A transfer trolley for a centrally located switchgear truck, characterized in that, The transfer vehicle includes a base (1), a tray (2), a hinge shaft (3), an adjustment assembly (4), a track plate (5), and a connecting pin (6). The base (1) and the tray (2) are rotatably connected by the hinge shaft (3). The hinge shaft (3) is located on the rear side of the base (1). The adjustment component (4) is located on the front side of the base (1). The adjustment component (4) is connected to the bottom of the tray (2). The adjustment component (4) adjusts the front side of the tray (2) for lifting. The track plate (5) is connected to the top of the tray (2). The connecting pin (6) is connected to the bottom of the front side of the track plate (5). The connecting pin (6) is adapted to the opening on the switch cabinet frame.

2. The transfer vehicle according to claim 1, characterized in that, The transfer vehicle is provided with two adjustment components (4) and two track plates (5). The two adjustment components (4) are symmetrically arranged at both ends of the front side of the base (1), and the two track plates (5) are arranged on both sides of the top of the tray (2) and perpendicular to the hinge axis (3).

3. The transfer vehicle according to claim 2, characterized in that, An operating shaft (7) is rotatably connected between the two adjustment components (4). The operating shaft (7) is parallel to the hinge shaft (3). The adjustment component (4) includes a mounting plate (41), a cam (42), and an adjustment handle (43). The mounting plate (41) is fixedly connected to the front side of the base (1). The operating shaft (7) is rotatably connected to the mounting plate (41). The cam (42) is sleeved on the operating shaft (7). The adjustment handle (43) is perpendicularly connected to the operating shaft (7).

4. The transfer vehicle according to claim 3, characterized in that, The adjustment assembly (4) further includes a first limiting rod (44) and a second limiting rod (45). The first limiting rod (44) passes vertically through the operating shaft (7) and is fixedly connected to the operating shaft (7). The second limiting rod (45) is perpendicular to and fixedly connected to the mounting plate (41). The second limiting rod (45) is located on the outer periphery of the operating shaft (7) in the rotation direction. When the adjustment handle (43) is rotated to the limit position, the first limiting rod (44) abuts against the second limiting rod (45).

5. The transfer vehicle according to claim 4, characterized in that, The mounting plate (41) is vertically provided with two second limiting rods (45). The two second limiting rods (45) are symmetrically arranged on the outer periphery of the operating shaft (7) in the rotation direction. When the adjusting handle (43) is rotated to the limit position, the two ends of the first limiting rod (44) abut against the two second limiting rods (45) respectively.

6. The transfer vehicle according to claim 3, characterized in that, The bottom of the tray (2) is provided with a crossbeam (21), which is located above the operating shaft (7). A limiting bending plate (22) is fixedly provided on the crossbeam (21), and the limiting bending plate (22) forms an active space. The operating shaft (7) passes through the active space.

7. The transfer vehicle according to claim 6, characterized in that, The adjustment assembly (4) also includes a spring (46), and a connecting rod (47) is provided on the side of the adjustment handle (43). One end of the spring (46) is fixedly connected to the crossbeam (21), and the other end of the spring (46) is connected to the connecting rod (47).

8. The transfer vehicle according to claim 7, characterized in that, The connecting rod (47) is provided with a connecting groove (47a), and the end of the spring (46) is provided with a hook, which is located in the connecting groove (47a).

9. The transfer vehicle according to claim 1, characterized in that, A baffle (23) is fixedly provided on the top of the tray (2), and the baffle (23) is located on the rear side of the track plate (5).

10. The transfer vehicle according to claim 1, characterized in that, The base (1) is provided with multiple casters (11) at its bottom.

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