A width-adjustable handcart switch propulsion type transfer device

Abstract

The application discloses a width-adjustable handcart switch pushing type transfer device, which comprises a transfer trolley and a platform assembly for carrying handcart type switch equipment, a foot-pedal type hydraulic cylinder is fixedly connected to one end of the transfer trolley away from the platform assembly, chain wheel assemblies are installed at the top of both ends of the power end of the foot-pedal type hydraulic cylinder, and the foot-pedal type hydraulic cylinder is connected with the platform assembly through the chain wheel assemblies. Two adjustable carrying plates are arranged in the inverted U-shaped support frame and matched with reverse lead screws and transmission nuts, flexible adjustment of the width of the carrying platform from 400 mm to 800 mm is realized, the device can be adapted to various specifications of handcart type switch equipment commonly used in power systems, and an operator only needs to step on the foot-pedal control part of the hydraulic cylinder, so that the platform assembly is driven to synchronously and stably ascend and descend along the guide rod of the transfer trolley through the fixed pulley type transmission of the chain wheel assemblies, and the platform inclination problem caused by the complicated adjustment of the traditional multiple support feet and the inconsistent height is fundamentally solved.

Description

Technical Field

[0001] This invention relates to the field of handcart switch transfer equipment technology, specifically a handcart switch push-type transfer device with adjustable width. Background Technology

[0002] Handcart switchgear transfer equipment is a specialized supporting device in power systems used for transferring and advancing 10kV and below handcart switchgear between the cabinet and the maintenance work station. It is a core instrument to ensure the smooth operation of disassembly, maintenance, and replacement of handcart switchgear. Handcart switchgear transfer device is a specialized device in the field of power operation and maintenance, specifically used to transfer and advance the equipment between the switch cabinet and the maintenance work station during the disassembly, maintenance, and replacement of handcart switchgear.

[0003] Currently, the handcart switchgear transfer devices used in power field applications have certain technical defects in practical applications. First, the transport platform has a fixed width structure, which can only accommodate a single specification of handcart switchgear. When dealing with handcart switchgear with widths of 550mm, 650mm, and 800mm commonly used in power systems, multiple transfer devices of different specifications are required, which not only increases the cost of equipment procurement and warehousing management but also reduces the flexibility of on-site operations. Second, the transport platform of this type of transfer device usually relies on four independent support legs. In order to match the height of switchgear and maintenance workstations of different heights, the platform height is usually adjusted using four independent support legs. During adjustment, each support leg must be operated individually, which is not only cumbersome and inefficient but also prone to inconsistent height adjustments of the support legs. This can lead to the transport platform tilting, the middle being suspended, uneven stress on the handcart switchgear after placement, and slippage and collisions during transport, posing safety hazards. Summary of the Invention

[0004] The present invention addresses the problem of overly simplistic solutions in existing technologies by providing a width-adjustable handcart switch push-type transfer device. This solves the problem mentioned in the background section that current transfer devices have fixed-width transport platforms, which can only accommodate single-size equipment. For commonly used handcart switch equipment of several widths, multiple devices are required. Furthermore, the transport platform relies on four independent support legs for height adjustment, which requires individual operation of each support leg, resulting in cumbersome and inefficient adjustments and potential inconsistencies in height adjustment.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0006] An adjustable-width handcart switch propulsion transfer device includes a transfer frame and a platform assembly for transporting handcart switch equipment. A foot-operated hydraulic cylinder is fixedly connected to one end of the transfer frame away from the platform assembly. Both ends of the power end of the foot-operated hydraulic cylinder are equipped with sprocket assemblies. The foot-operated hydraulic cylinder is connected to the platform assembly through the sprocket assemblies and is used to drive the platform assembly to move up and down along the transfer frame.

[0007] The platform assembly includes a U-shaped support frame and adjustable transport plates. The U-shaped support frame only moves up and down, and its two ends extend outward along its length to form suspended support components. The two adjustable transport plates are distributed opposite each other above the U-shaped support frame and are attached to the surface of the U-shaped support frame. The two adjustable transport plates can slide away from each other along the surface of the suspended support components to widen the overall transport support area.

[0008] Furthermore, the transfer frame is equipped with casters on the bottom side near the platform assembly, and with locking casters on the bottom side away from the platform assembly and corresponding to the foot-operated hydraulic cylinder. Handrails are welded to both sides of the end of the transfer frame near the foot-operated hydraulic cylinder for pushing the transfer frame to move. The platform assembly also includes a guide frame and a horizontal load-bearing beam. The guide frame slides in conjunction with the guide rods installed inside the uprights of the transfer frame. The horizontal load-bearing beam is vertically arranged at the bottom of the guide frame, and the two are welded together. The bottom of the U-shaped support frame is rigidly connected to the surface of the horizontal load-bearing beam.

[0009] Furthermore, the sprocket assembly includes a sprocket and a chain. The sprocket is installed at both ends of the power end of the foot-operated hydraulic cylinder. One end of the chain is fixedly connected to the guide frame, and the other end passes around the sprocket and is fixedly connected to the transfer vehicle frame. The foot-operated hydraulic cylinder drives the sprocket to rotate through its telescopic movement, thereby driving the chain transmission and realizing the lifting and lowering of the platform assembly along the transfer vehicle frame.

[0010] Furthermore, a reverse screw is rotatably connected inside the U-shaped support frame, and the bottoms of the two adjustable transport plates are respectively fixedly connected to the transmission nuts on the outer wall of the reverse screw. The two adjustable transport plates move towards or away from each other through the reverse screw, and the end faces of the two adjustable transport plates that are close to each other form a stepped mating surface that interlocks with each other.

[0011] Furthermore, the surfaces of the two adjustable pallets are covered with surface protective plates. The surface protective plates have hollowed-out grooves on both sides for the adjustable pallets to slide and extend. The other two sides are rigidly connected to the corresponding sides of the U-shaped support frame. The adjustable pallets form a closed sliding space between the surface protective plates and the U-shaped support frame.

[0012] Furthermore, the U-shaped support frame is slidably provided with a main positioning pin and an auxiliary positioning pin on the side away from the transfer vehicle frame. The auxiliary positioning pins are symmetrically distributed about the main positioning pin, and the surface of the outer protective plate is provided with a groove for the main positioning pin to pass through and slide at the corresponding position.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] 1. This invention achieves flexible adjustment of the transport platform width from 400mm to 800mm by setting a reverse screw within the U-shaped support frame and using two adjustable transport plates fixedly connected to the reverse screw drive nut. This adapts to various specifications of handcart-type switchgear commonly used in power systems, fundamentally avoiding the need for multiple fixed-width transport devices and reducing equipment investment and warehousing management costs. Furthermore, the two adjustable transport plates have interlocking stepped mating surfaces at their adjacent ends, which, combined with the limiting and guiding function of the surface guard plate, ensures smooth and non-deviation-prone sliding of the adjustable transport plates. Even after adjustment, a continuous and flat support surface is maintained, solving the problem of poor adaptability of traditional fixed-width platforms. It also effectively avoids uneven stress and structural deformation caused by the central suspension of traditional platforms, improving the overall rigidity and support stability of the platform. In addition, the surface guard plate and the U-shaped support frame form a closed sliding space while maintaining the integrity of the transport surface, further enhancing the safety of transport operations.

[0015] 2. This invention employs an integrated lifting structure combining a foot-operated hydraulic cylinder and a sprocket assembly, replacing the traditional four-support leg height adjustment method. Operators only need to step on the foot pedal of the hydraulic cylinder to drive the platform assembly to rise and fall synchronously and smoothly along the guide rod of the transfer frame via the fixed pulley transmission of the sprocket assembly. This fundamentally solves the problems of cumbersome multi-support leg adjustments and platform tilting caused by inconsistent heights, improving the convenience and efficiency of height adjustment. Simultaneously, the universal wheels and universal locking wheels at the bottom of the transfer frame, along with the end handles, enable flexible movement and rapid positioning of the device. The symmetrically arranged main and auxiliary positioning pins on the U-shaped support frame can be flexibly adjusted along the grooves of the surface guard plate, precisely aligning with the insertion holes of the handcart-type switchgear base, achieving rapid and accurate positioning of the transfer device and equipment, and ensuring horizontal stability during positioning. The synchronous stability of the lifting structure and the flexibility of the positioning structure work synergistically, enabling the handcart-type switchgear to quickly and smoothly complete height docking and positioning, effectively improving the overall efficiency and safety of the transfer operation.

[0016] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the rear view of the transfer vehicle frame of the present invention;

[0019] Figure 3 This is a top view schematic diagram of the platform assembly structure of the present invention;

[0020] Figure 4 This is a schematic diagram of the bottom view of the platform assembly of the present invention;

[0021] Figure 5 This is a schematic diagram of the adjustable transport platform structure of the present invention.

[0022] Numbering on the map:

[0023] 1. Transfer frame; 2. Platform assembly; 21. Guide frame; 22. Horizontal load-bearing beam; 23. U-shaped support frame; 231. Main positioning pin; 232. Auxiliary positioning pin; 24. Adjustable transport plate; 25. Reverse screw; 26. Surface protective plate; 3. Foot-operated hydraulic cylinder; 4. Sprocket assembly. Detailed Implementation

[0024] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be given below with reference to the accompanying drawings, which illustrate several embodiments of the present invention. However, the present invention can be implemented in different forms and is not limited to the embodiments described in the text. Rather, these embodiments are provided to make the disclosure of the present invention more thorough and complete.

[0025] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0026] Please refer to the appendix carefully. Figure 1-5 An adjustable width handcart switch push-type transfer device includes a transfer frame 1 and a platform assembly 2 for transporting handcart switch equipment. A foot-operated hydraulic cylinder 3 is fixedly connected to the end of the transfer frame 1 away from the platform assembly 2. Both ends of the power end of the foot-operated hydraulic cylinder 3 are equipped with sprocket assemblies 4. The foot-operated hydraulic cylinder 3 is connected to the platform assembly 2 through the sprocket assemblies 4 and is used to drive the platform assembly 2 to rise and fall along the transfer frame 1.

[0027] Platform assembly 2 includes a U-shaped support frame 23 and adjustable transport plates 24. The U-shaped support frame 23 only moves up and down, and the two ends of the U-shaped support frame 23 extend outward along the length direction to form suspended support components. The two adjustable transport plates 24 are distributed opposite to each other above the U-shaped support frame 23 and are attached to the surface of the U-shaped support frame 23. The two adjustable transport plates 24 can slide away from each other along the surface of the suspended support components to widen the overall transport support area.

[0028] In this embodiment, as Figure 1 and Figure 2 As shown, the transfer frame 1 is equipped with casters on the bottom side near the platform assembly 2, and casters with locking wheels on the bottom side away from the platform assembly 2 and corresponding to the foot-operated hydraulic cylinder 3. Handrails are welded on both sides of the end of the transfer frame 1 near the foot-operated hydraulic cylinder 3 for pushing the transfer frame 1 to move. The platform assembly 2 also includes a guide frame 21 and a horizontal load-bearing beam 22. The guide frame 21 is slidably engaged with the guide rods installed in the uprights of the transfer frame 1. The horizontal load-bearing beam 22 is vertically arranged at the bottom of the guide frame 21. The two are welded together, and the bottom of the U-shaped support frame 23 is rigidly connected to the surface of the horizontal load-bearing beam 22.

[0029] The sprocket assembly 4 includes a sprocket and a chain. The sprocket is installed at both ends of the power end of the foot-operated hydraulic cylinder 3. One end of the chain is fixedly connected to the guide frame 21, and the other end passes around the sprocket and is fixedly connected to the transfer frame 1. The foot-operated hydraulic cylinder 3 drives the sprocket to rotate through its telescopic movement, thereby driving the chain transmission and realizing the lifting and lowering of the platform assembly 2 along the transfer frame 1.

[0030] With the above structure, the platform height of traditional handcart switch transfer devices is mostly adjusted by four independently adjustable support feet. This is not only cumbersome and inefficient, but also prone to problems such as asynchronous adjustment and inconsistent height, causing the platform to tilt and unevenly stressed, affecting the safety of transfer. This device adopts an integrated lifting structure with foot-operated hydraulic cylinder 3 and sprocket assembly 4. Through the extension and retraction movement of foot-operated hydraulic cylinder 3, combined with the fixed pulley transmission of sprocket chain, the platform assembly 2 can be kept horizontal during the lifting process, improving the ease of operation and reliability of the device, and fundamentally avoiding the imbalance and tilting problems caused by multi-point adjustment.

[0031] In this embodiment, as Figure 3 , Figure 4 and Figure 5 As shown, a reverse screw 25 is rotatably connected inside the U-shaped support frame 23. The bottoms of the two adjustable transport plates 24 are fixedly connected to the transmission nuts on the outer wall of the reverse screw 25. The two adjustable transport plates 24 move towards or away from each other through the reverse screw 25, and the end faces of the two adjustable transport plates 24 that are close to each other form a stepped mating surface that interlocks with each other.

[0032] With the above structure, the transport platform of traditional handcart switch transfer devices is mostly a fixed width structure, which cannot accommodate handcart switch equipment of various sizes. Therefore, multiple specifications of platforms are usually set up to cope with this. Moreover, the transport platform of traditional handcart switch transfer devices usually uses four independent adjustable height support legs to support the platform, which easily leads to the middle of the platform being suspended in the air, resulting in poor overall rigidity and stability. In contrast, this device sets a reverse screw 25 in the U-shaped support frame 23 and connects the two adjustable transport plates 24 to the transmission nuts on the reverse screw 25, which allows the two adjustable transport plates 24 to be connected to the transmission nuts on the reverse screw 25. Driven by the reverse lead screw 25, synchronous opposite or back-to-back movements are achieved. The width adjustment range covers 400mm to 800mm, which can meet the placement and support requirements of commonly used handcart switch equipment. At the same time, the end faces of the two adjustable transport plates 24 that approach each other adopt a stepped mating surface that interlocks with each other. This ensures the fit of the two plates during movement and allows the adjustable transport plates 24 to form a continuous and flat support surface after adjustment. The overall structure is rigid and the force is uniform, effectively avoiding problems such as the platform being suspended in the middle or deformation under force, thus improving the stability and reliability of the transfer process.

[0033] In this embodiment, as Figure 3 and Figure 5 As shown, the surfaces of the two adjustable pallets 24 are covered with surface protective plates 26. The two sides of the surface protective plates 26 are provided with hollow grooves for the adjustable pallets 24 to slide and extend. The other two sides are rigidly connected to the corresponding sides of the U-shaped support frame 23. The adjustable pallets 24 form a closed sliding space between the surface protective plates 26 and the U-shaped support frame 23.

[0034] With the above structure, the surface guard plate 26 can provide a stable limiting guide for the adjustable transport plate 24, ensuring that the sliding process of the adjustable transport plate 24 is smooth and does not deviate from above, and can also form a closed sliding space to effectively block the sliding gap of the adjustable transport plate 24, while always maintaining the continuous flatness of the transport surface.

[0035] In this embodiment, as Figure 3 and Figure 5 As shown, the U-shaped support frame 23 has a main positioning pin 231 and an auxiliary positioning pin 232 slidably arranged on the side away from the transfer frame 1. The auxiliary positioning pins 232 are symmetrically distributed about the main positioning pins 231, and the surface of the outer guard plate 26 has a groove for the main positioning pins 231 to pass through and slide at the corresponding position.

[0036] Through the above structure, the main positioning pin 231 and the symmetrically distributed auxiliary positioning pins 232, together with their sliding structure, facilitate quick adjustment of their positions and precise docking with the insertion through hole of the handcart-type switchgear base, realizing rapid positioning of the transfer device and the equipment. At the same time, it can ensure the horizontal stability during positioning, which helps to improve positioning efficiency and transfer safety, and ensures that the equipment is smoothly docked to the surface of the outer protective plate 26.

[0037] The specific operating procedure of this utility model is as follows: In actual use, the adjustable width handcart switch push-type transfer device first moves the entire device to the location of the handcart switch to be transferred by using the universal wheels and universal locking wheels at the bottom of the transfer frame 1. Then, step on the foot pedal control part of the foot pedal hydraulic cylinder 3 (HF series, load capacity 500KG) fixed on the transfer frame 1 to generate a lifting motion at its power end. When the power end extends upward, it drives the sprockets at both ends of the top to lift synchronously. During the lifting process, the sprockets and the chain roll relative to each other. With the fixed connection structure between the two ends of the chain and the guide frame 21 and the transfer frame 1 respectively, a transmission form of sprocket is formed. Under the traction of the chain, the guide frame 21 fixedly connected to the chain slides upward along the guide rod inside the upright of the transfer frame 1, thereby realizing the height adjustment of the entire platform assembly 2 along the transfer frame 1, so that the height of the platform assembly 2 is adapted to the docking height of the handcart switch.

[0038] After the height adjustment is completed, according to the width specifications of the base of the handcart-type switchgear to be transferred, rotate the crank handle located on one side of the U-shaped support frame 23 and connected to the reverse screw 25, so as to drive the reverse screw 25 to rotate synchronously. Under the rotation drive of the reverse screw 25, the two relatively distributed adjustable transport plates 24 move in opposite directions and extend outward from the hollow slots opened on both sides of the surface protective plate 26, thereby widening the overall transport support area to adapt to the width of the handcart-type switchgear to be transferred.

[0039] The two adjustable pallets 24 have stepped mating surfaces that interlock with each other, which ensures a smooth sliding process and a continuous and flat support surface. The adjustable pallets 24 move within the closed sliding space formed between the surface guard plate 26 and the U-shaped support frame 23. The surface guard plate 26 always covers the adjustable pallets 24 to ensure the integrity of the transport surface.

[0040] Subsequently, according to the preset insertion through-hole positions on the base of the handcart-type switchgear (it should be noted that the base for placing the handcart-type switchgear usually has insertion through-holes that are compatible with the main positioning pin 231 and the auxiliary positioning pin 232. The purpose of setting these through-holes is to achieve positioning of the handcart-type switchgear and the transfer device), the main positioning pin 231 and the auxiliary positioning pin 232, which are slidably set on the outside of the U-shaped support frame 23, are adjusted respectively, so that the main positioning pin 231 and the auxiliary positioning pin 232 slide along the corresponding sliding grooves to the positions that match the insertion through-holes. Then, the transfer frame 1 is pushed by the handle at the end of the transfer frame 1, so that the main positioning pin 231 and the auxiliary positioning pin 232 are inserted into the through-holes of the base of the handcart-type switchgear, thereby achieving positioning and docking of the transfer device and the handcart-type switchgear. Then, the handcart-type switchgear is smoothly pulled to the top of the surface guard plate 26 by the propulsion structure of the handcart-type switchgear itself. Then, the handcart-type switchgear can be transferred by pushing the handle at the end of the transfer frame 1.

[0041] The present invention has been described by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A width-adjustable handcart switch push-type transfer device, characterized in that: The system includes a transfer frame (1) and a platform assembly (2) for transporting handcart-type switchgear. The transfer frame (1) is fixedly connected to a foot-operated hydraulic cylinder (3) at one end away from the platform assembly (2). Both ends of the power end of the foot-operated hydraulic cylinder (3) are equipped with sprocket assemblies (4). The foot-operated hydraulic cylinder (3) is connected to the platform assembly (2) through the sprocket assembly (4) and is used to drive the platform assembly (2) to rise and fall along the transfer frame (1). The platform assembly (2) includes a U-shaped support frame (23) and adjustable transport plates (24). The U-shaped support frame (23) only moves up and down, and the two ends of the U-shaped support frame (23) extend outward along the length direction to form a suspended support component. The two adjustable transport plates (24) are distributed opposite to each other above the U-shaped support frame (23) and are attached to the surface of the U-shaped support frame (23). The two adjustable transport plates (24) can slide away from each other along the surface of the suspended support component to widen the overall transport support area.

2. The adjustable-width handcart switch push-type transfer device according to claim 1, characterized in that: The transfer frame (1) is provided with a universal wheel on the bottom side near the platform assembly (2) and a universal locking wheel on the bottom side away from the platform assembly (2) and corresponding to the foot pedal hydraulic cylinder (3). Handrails are welded on both sides of the end of the transfer frame (1) near the foot pedal hydraulic cylinder (3) for pushing the transfer frame (1) to move. The platform assembly (2) also includes a guide frame (21) and a horizontal bearing beam (22). The guide frame (21) is slidably engaged with the guide rod provided in the upright of the transfer frame (1). The horizontal bearing beam (22) is vertically arranged at the bottom of the guide frame (21). The two are welded together, and the bottom of the U-shaped support frame (23) is rigidly connected to the surface of the horizontal bearing beam (22).

3. The adjustable-width handcart switch push-type transfer device according to claim 1, characterized in that: The sprocket assembly (4) includes a sprocket and a chain. The sprocket is installed at both ends of the power end of the foot-operated hydraulic cylinder (3). One end of the chain is fixedly connected to the guide frame (21), and the other end is fixedly connected to the transfer frame (1) after passing around the sprocket. The foot-operated hydraulic cylinder (3) drives the sprocket to rotate through telescopic movement, thereby driving the chain transmission and realizing the lifting and lowering of the platform assembly (2) along the transfer frame (1).

4. The adjustable-width handcart switch push-type transfer device according to claim 1, characterized in that: The U-shaped support frame (23) is rotatably connected to a reverse screw (25). The bottoms of the two adjustable transport plates (24) are respectively fixedly connected to the transmission nuts on the outer wall of the reverse screw (25). The two adjustable transport plates (24) move towards or away from each other through the reverse screw (25), and the end faces of the two adjustable transport plates (24) that are close to each other form a stepped mating surface that interlocks with each other.

5. The adjustable-width handcart switch push-type transfer device according to claim 1, characterized in that: The two adjustable pallets (24) are covered with surface protective plates (26). The surface protective plates (26) have hollowed-out grooves on both sides for the adjustable pallets (24) to slide and extend. The other two sides are rigidly connected to the corresponding sides of the U-shaped support frame (23). The adjustable pallets (24) form a closed sliding space between the surface protective plates (26) and the U-shaped support frame (23).

6. The adjustable-width handcart switch push-type transfer device according to claim 1, characterized in that: The U-shaped support frame (23) is slidably provided with a main positioning pin (231) and an auxiliary positioning pin (232) on the side away from the transfer frame (1). The auxiliary positioning pin (232) is symmetrically distributed about the main positioning pin (231), and the surface of the outer protective plate (26) is provided with a groove for the main positioning pin (231) to pass through and slide at the corresponding position.

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