Electric carrying and hoisting rail flat car

Abstract

The invention relates to the technical field of rail flat cars, in particular to an electric carrying and hoisting rail flat car which comprises a bottom frame, a bogie is arranged at the bottom of the bottom frame, a hoisting mechanism is arranged at the top of the bottom frame, and the electric carrying and hoisting rail flat car is characterized in that a diesel generating set and a hydraulic and electrical unit are arranged at the top of the bottom frame; the bottom frame is of an all-steel welding structure and is composed of a middle beam, side beams, sleeper beams, end beams, large cross beams and small cross beams, the middle beam is 310 cap-shaped steel, a plurality of partition plates are additionally arranged in the middle of the middle beam, and a lower cover plate is additionally arranged below the middle beam to form a box body structure; the bogie is of an axle box type, and a variable frequency motor is connected to the bogie. And the hoisting mechanism comprises a full-hydraulic telescopic suspension arm structure. According to the electric carrying and hoisting rail flat car, the chassis adopts a middle beam bearing structure, the middle beam is 310 cap-shaped steel, a plurality of partition plates are additionally arranged in the middle of the middle beam, and a lower cover plate is additionally arranged below the middle beam to form a box body structure, so that the bearing stability of the middle beam can be effectively improved, and concentrated load caused by hoisting and impact during railway operation can be dealt with.

Description

Technical Field

[0001] This invention relates to the field of railcar technology, specifically to an electric lifting railcar. Background Technology

[0002] A rail-mounted flatcar is a rail transport device used in factories, workshops, or large assembly lines. The car body is equipped with a crane for handling and lifting operations. It is often used for the cross-regional transfer of heavy components, machine tools, steel coils, pipes, and other large items.

[0003] Currently, this equipment is widely used in fixed indoor environments with relatively simple routes, such as large factories, workshops, and logistics warehousing centers. It relies on the factory's power grid and a good driving environment. In scenarios such as material handling and production line transfer inside the workshop, it is often equipped with a dedicated track or cross track system. However, for railway field operations, the existing lifting track flatcars are difficult to adapt to various complex outdoor environments and face technical challenges in terms of power and stability.

[0004] In view of this, we propose an electric lifting rail flatcar. Summary of the Invention

[0005] The purpose of this invention is to provide an electric lifting rail flatcar that solves the problem that existing lifting rail flatcars are only suitable for indoor environments and are difficult to operate in complex outdoor environments.

[0006] To achieve the above objectives, the present invention provides the following technical solution: An electric lifting rail flatcar includes a base frame, a bogie is provided at the bottom of the base frame, and a lifting mechanism is provided at the top of the base frame. The key feature is that a diesel generator set and a hydraulic and electrical unit are provided at the top of the base frame. The base frame is an all-steel welded structure, and the base frame is composed of a middle beam, side beams, pillow beams, end beams, large cross beams and small cross beams. The middle beam is 310 cap-shaped steel, with several partitions installed in the middle, and a lower cover plate installed below to form a box structure. The bogie is of the axle box type and is equipped with a variable frequency motor. The hoisting mechanism includes a fully hydraulic telescopic boom structure that can rotate 360°.

[0007] As a preferred technical solution, the bottom of the base frame is provided with at least four lifting legs, which are driven by hydraulic cylinders, and the four lifting legs are distributed in a rectangular shape at the four opposite corners of the base frame.

[0008] As a preferred technical solution, the side beams of the base frame are made of 20a type channel steel, the bolster beams are made of upper and lower cover plates and web plates welded together to form a closed box beam, the bolster beams connect the middle beams and the side beams, the large crossbeams are arranged between the bolster beams, and the small crossbeams are made of No. 12 channel steel.

[0009] As a preferred technical solution, the upper surface of the underframe is covered with a 6mm thick patterned steel plate, and the middle beam and side beams between the two sleeper beams are reserved with sufficient upward deflection. U-shaped rings for hoisting the bogie are installed on the underframe. As a preferred technical solution, the bogie includes an active bogie and a passive bogie. The active bogie is connected to two sets of axle-mounted reducers and variable frequency motors. The reducers and variable frequency motors are fixed in the middle of the axles and distributed on the 3rd and 4th axles of the vehicle.

[0010] As a preferred technical solution, the bogie adopts a welded structure and is equipped with tapered roller bearings 352226, RD2 type axles, and HDSA type rolled steel wheels with LM wear-resistant treads.

[0011] As a preferred technical solution, the bogie is equipped with an air brake device and a hand brake device, which include a 120-type control valve, an integral spin-sealed brake cylinder, a stainless steel embedded air reservoir, an A-type stainless steel ball-core angle plug, and a combined dust collector.

[0012] As a preferred technical solution, it also includes equipping the vehicle with a remote control device for remotely controlling the movement of the vehicle and the operation of the hoisting mechanism.

[0013] As a preferred technical solution, the total power of the diesel generator set is 70kw, and the total power of the variable frequency motor is 30kw.

[0014] As a preferred technical solution, the hoisting mechanism includes a fixed base, which is fixedly installed on the base frame. A rotating seat is rotatably installed on the top of the fixed base, and a telescopic arm is rotatably installed on the top of the rotating seat. A hydraulic cylinder is connected between the telescopic arm and the rotating seat, and a hook is provided at the end of the telescopic arm away from the rotating seat.

[0015] By employing the above technical solution, the present invention provides an electrically operated lifting rail flatcar. It possesses at least the following beneficial effects: This electric lifting rail flatcar features a central beam load-bearing structure for its underframe. The central beam is made of 310mm cap steel with several partitions in the middle and a lower cover plate to form a box structure. This effectively improves the stability of the central beam under load and helps to cope with concentrated loads during lifting and impacts from railway operation. By installing a diesel generator set and a variable frequency motor, it can be powered on a mobile basis. Variable frequency speed regulation reduces start-stop impact, enabling the vehicle to operate stably outdoors. The lifting mechanism is equipped with a hydraulic telescopic boom that can rotate 360°, providing a wide working range and increasing lifting flexibility, making the entire device more suitable for field operations. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the invention, form part of this application: Figure 1 This is a front view of the overall structure of an embodiment of the present invention; Figure 2 This is a side view of the overall structure of an embodiment of the present invention; Figure 3 This is a schematic diagram of the hoisting mechanism in an embodiment of the present invention.

[0017] In the diagram: 1. Diesel generator set; 2. Hydraulic and electrical unit; 3. Bogie; 4. Underframe; 5. Lifting mechanism; 501. Fixed base; 502. Rotary base; 503. Telescopic boom; 504. Hook; 6. Underframe accessories; 7. Air brake device; 8. Variable frequency motor; 9. Hand brake device; 10. Lifting outriggers. Detailed Implementation

[0018] The embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings and examples. The detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of this disclosure by way of example, but should not be used to limit the scope of this disclosure. This disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0019] These embodiments are provided to make the disclosure thorough and complete, and to fully express the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions, and values ​​set forth in these embodiments should be interpreted as exemplary only and not as limiting.

[0020] It should be noted that, in the description of this disclosure, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationship, are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0021] Furthermore, the terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the permissible margin of error. "Parallel" is not strictly parallel, but within the permissible margin of error. Terms such as "including" or "contains" mean that the element preceding the word encompasses the element listed after the word, and do not exclude the possibility of encompassing other elements as well.

[0022] It should also be noted that, in the description of this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this disclosure depending on the specific circumstances.

[0023] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0024] Currently, lifting rail flatcars are widely used in fixed indoor environments with relatively simple routes, such as large factories, workshops, and logistics warehousing centers. They rely on the factory's power grid and a good driving environment. In scenarios such as material handling and production line transfer within the workshop, they are often equipped with dedicated rail or cross rail systems. However, for railway field operations, existing lifting rail flatcars are difficult to adapt to various complex outdoor environments and face technical challenges in terms of power and stability.

[0025] Please see Figures 1-3 The present invention provides a technical solution: An electric lifting rail flatcar includes a base frame 4, with a bogie 3 mounted at the bottom of the base frame 4. A diesel generator set 1 and a hydraulic and electrical unit 2 are mounted on the top of the car body 4. Base frame accessories 6 and an air brake assembly 7 are mounted at the bottom of the base frame 4. A variable frequency motor 8 and a reducer are mounted on the bogie 3, and a handbrake device 9 is mounted on the bogie 3. At least four lifting outriggers 10 are mounted at the bottom of the base frame 4, and a lifting mechanism 5 is mounted on the top of the base frame 4. A hydraulic system provides power for the operation of the lifting mechanism 5 and the lifting of the outriggers 10.

[0026] The electric lifting rail flatcar has a self-weight of ≤13t and a load capacity of ≤10t.

[0027] Specifically, the base frame 4 is an all-steel welded structure, composed of a central beam, side beams, bolster beams, end beams, large crossbeams, and small crossbeams. The central beam is made of 310mm cap-shaped steel, with several partitions in the middle and a lower cover plate to form a box structure, ensuring stability under load and traction. The side beams are made of 20a type channel steel. The bolster beams are welded together from 10mm thick upper and lower cover plates and 6mm thick web plates to form a closed box beam, connecting the central beam and side beams. The end beams are made of 8mm thick steel plates. The large crossbeams are arranged between the bolster beams, and the small crossbeams are made of No. 12 channel steel. Longitudinal supports are also made of No. 12 channel steel.

[0028] The upper surface of the base frame 4 is covered with an 8mm patterned steel plate as the base plate, which is flat, non-slip, beautiful and durable.

[0029] The underframe adopts a center beam load-bearing structure, with sufficient upward deflection reserved between the center beam and side beams between the two bolster beams to accommodate both uniformly distributed and concentrated loads, meeting the vehicle's load-bearing requirements. U-shaped rings for hoisting the bogies are designed and installed at standard locations on the car body.

[0030] Conventional flatcar underframes are lightweight welded structures, which cannot withstand the concentrated loads during lifting and the impacts of railway operation. This embodiment uses 310mm cap steel with several partitions in the middle and a lower cover plate to form a box-type beam structure, which effectively increases the overall strength of the underframe, overcomes the huge overturning force and load of the lifting mechanism, and ensures the safety and lifespan of the equipment. At the same time, it can control the weight while ensuring sufficient strength.

[0031] Bogie 3 is an axle box type, with two sets: an active bogie 3 and a passive bogie 3. Bogie 3 is welded, with welded structures for the bolster and side frames. It uses a lower center plate with a diameter of φ308mm and mainly consists of a center plate beam, side beams, spring tube assembly, wheelsets, and basic brakes. It is a three-part type. Spring tube assemblies are arranged on the side beams. The center plate beam moves up and down via guide grooves on the side beams and is damped by springs. It uses 352226 tapered roller bearings, RD2 type axles, and HDSA type rolled steel wheels with a diameter of 650mm and LM wear-type treads, effectively reducing wheel wear. The basic braking device uses austenitic ductile iron bushings and a combined brake beam, with the brake beam frame and brake shoe support connected by steel rivets. The entire vehicle exhibits good running stability and smoothness.

[0032] The active bogies employ two sets of axle-mounted reducers and variable frequency motors (VFM motors), fixed in the middle of the axles and distributed on the 3rd and 4th axles of the vehicle. The entire structure is compact with a rational spatial layout. The dual-motor drive ensures sufficient driving force, enabling the vehicle to start and run stably under heavy loads. Through the cooperation of the axial bogies (3) and the variable frequency drive system, it can adapt to the complex track conditions of railway operation.

[0033] In this embodiment, the diesel generator set 1 and the frequency converter control system together constitute the electrical system. The diesel generator set 1 provides 380V AC power to the entire vehicle, while the frequency converter control system primarily controls the vehicle's speed and movement.

[0034] Specifically, the total power of diesel generator set 1 is 70 kW. By setting up diesel generator set 1, it is easy to provide mobile power supply, thus eliminating the need to obtain external power through cables, increasing the applicability of the electric lifting rail flatcar, and facilitating independent operations in the field.

[0035] The total power of the variable frequency motor 8 is 30kW. By using variable frequency speed control, the start-stop impact is reduced, making the vehicle's start-up, operation, and stopping smoother, and improving the stability of the vehicle during lifting operations.

[0036] In this embodiment, the vehicle body is equipped with two braking methods: air braking and hand braking. The main pressure of the air braking assembly 7 meets the requirements of 500 kPa and 600 kPa. It mainly consists of a type 120 control valve, a 254x254 diameter integral spin-sealed brake cylinder, a stainless steel embedded air reservoir, a type A stainless steel ball-core angle plug, and a combined dust collector. Stainless steel brake piping and flanges are used, along with brake hose connectors, E-ring seals, and high-friction coefficient synthetic brake shoes conforming to TB / T2403. An NSW type hand brake is used, connected to the vehicle body with special rivets or short-tail rivets. The hand brake lever is connected to the chain hoop, and the hand brake pulley is connected to the pulley seat with rivets.

[0037] In this embodiment, the hoisting mechanism 5 includes a fixed base 501, which is fixedly installed on the base frame 4. A rotating seat 502 is rotatably installed on the top of the fixed base 501. The rotation angle of the rotating seat 502 is ±360°. A telescopic arm 503 is rotatably installed on the top of the rotating seat 502. The telescopic arm 503 is hydraulically controlled. A hydraulic cylinder is connected between the telescopic arm 503 and the rotating seat 502 to control the swing of the telescopic arm 503. The swing range is 0 to 75°. A hook 504 is provided at the end of the telescopic arm 503 away from the rotating seat 502.

[0038] Conventional flatcars are typically equipped with simple fixed-boom or small-range luffing cranes, limiting their operating range and flexibility. This embodiment, however, features a fully hydraulic telescopic crane. Through the hydraulic telescopic mechanism, the boom length can be adjusted, and the fully rotatable swivel base 502 allows for 360° rotation, effectively expanding the operating range of the lifting mechanism 5. In this embodiment, the vehicle is equipped with a remote control device, and the vehicle's movement and the hoisting mechanism's lifting operations can be remotely controlled by the remote control.

[0039] Conventional flatcar hoisting relies primarily on its own weight for stability, which carries a risk of tipping over when lifting heavy loads. In this embodiment, four hydraulically controlled lifting outriggers 10 are installed. The four lifting outriggers 10 are arranged in a rectangle at the four opposite corners of the base frame 4. During hoisting, the outriggers extend and support the sides of the track, which can balance the tipping moment of the hoisting mechanism 5 and improve the stability during hoisting.

[0040] It is worth noting that one end of the vehicle is equipped with an end guardrail, a side guardrail, and a hoisting mechanism fence. The enclosure is made of wooden flooring; a movable bar is installed between the end guardrail and the side guardrail to facilitate workers getting on and off the vehicle.

[0041] A coupler buffer device is installed on one side of the frame 4, and the coupler connection device uses a No. 2 coupler made of C-grade steel.

[0042] The electric lifting rail flatcar in this embodiment uses a central beam load-bearing structure for its underframe. The central beam is made of 310mm cap-shaped steel with several partitions in the middle and a lower cover plate to form a box structure. This effectively improves the stability of the central beam under load and can cope with the concentrated load during lifting and the impact of railway operation. By setting up a diesel generator set and a variable frequency motor, it can be powered on a mobile basis. Variable frequency speed regulation reduces the impact of starting and stopping, allowing the vehicle to operate stably outdoors. The lifting mechanism is equipped with a hydraulic telescopic boom that can rotate 360°, providing a wide working range and increasing the flexibility of lifting, making the entire device more suitable for field operations. It can be used by railway engineering, signaling, and other departments for rail transport, or as a special lifting and transport vehicle integrating lifting and transport functions. It can load, unload, and transport long and heavy goods such as rails, turnouts, track maintenance machinery, engineering components, and electromechanical equipment, as well as rescue equipment and materials.

[0043] The embodiments of this disclosure have now been described in detail. To avoid obscuring the concept of this disclosure, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0044] While specific embodiments of this disclosure have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of this disclosure. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of this disclosure. In particular, as long as there is no structural conflict, the technical features mentioned in the various embodiments can be combined in any manner.

Claims

1. An electric lifting rail flatcar, comprising a base frame (4), wherein a bogie (3) is provided at the bottom of the base frame (4), and a lifting mechanism (5) is provided at the top of the base frame (4), characterized in that, The base frame (4) is equipped with a diesel generator set (1) and a hydraulic and electrical unit (2) on top. The base frame (4) is an all-steel welded structure, and the base frame (4) consists of a middle beam, side beams, pillow beams, end beams, large cross beams and small cross beams. The middle beam is 310 cap-shaped steel, with several partitions installed in the middle and a lower cover plate installed below to form a box structure. The bogie (3) is of the axle box type, and a variable frequency motor (8) is connected to the bogie (3). The hoisting mechanism (5) includes a fully hydraulic telescopic boom structure and can rotate 360°.

2. The electric lifting rail flatcar according to claim 1, characterized in that, The base frame (4) is provided with at least four lifting legs (10) at the bottom. The lifting legs (10) are driven by hydraulic cylinders. The four lifting legs (10) are distributed in a rectangular shape at the four opposite corners of the base frame (4).

3. The electric lifting rail flatcar according to claim 1, characterized in that, The side beams of the base frame (4) are made of 20a type channel steel. The bolster beams are made of upper and lower cover plates and web plates welded together to form a closed box beam. The bolster beams connect the middle beams and the side beams. The large cross beams are arranged between the bolster beams. The small cross beams are made of No. 12 channel steel.

4. The electric lifting rail flatcar according to claim 1, characterized in that, The upper surface of the base frame (4) is covered with a 6mm thick patterned steel plate. The middle beam and side beam between the two sleeper beams are reserved with sufficient upward deflection. The base frame (4) is equipped with a U-shaped ring for hoisting the bogie (3).

5. The electric lifting rail flatcar according to claim 1, characterized in that, The bogie (3) includes an active bogie (3) and a passive bogie (3). The active bogie (3) is connected to two sets of axle-mounted reducers and variable frequency motors (8). The reducers and variable frequency motors (8) are fixed in the middle of the axle and distributed on the 3rd and 4th axles of the vehicle.

6. The electric lifting rail flatcar according to claim 1, characterized in that, The bogie (3) adopts a welded structure and is equipped with tapered roller bearings 352226, RD2 type axles and HDSA type rolled steel wheels with LM wear-resistant treads.

7. The electric lifting rail flatcar according to claim 1, characterized in that, The bogie (3) is equipped with an air brake device (7) and a hand brake device (9). The air brake device (7) and the hand brake device (9) include a 120-type control valve, an integral spin-sealed brake cylinder, a stainless steel embedded air storage cylinder, an A-type stainless steel ball core angle plug, and a combined dust collector.

8. The electric lifting rail flatcar according to claim 1, characterized in that, It also includes a remote control device for remotely controlling the movement of the vehicle and the operation of the hoisting mechanism (5).

9. The electric lifting rail flatcar according to claim 1, characterized in that, The total power of the diesel generator set (1) is 70kw, and the total power of the variable frequency motor (8) is 30kw.

10. The electric lifting rail flatcar according to claim 1, characterized in that, The hoisting mechanism (5) includes a fixed base (501), which is fixedly installed on the base frame (4). A rotating seat (502) is rotatably installed on the top of the fixed base (501). A telescopic arm (503) is rotatably installed on the top of the rotating seat (502). A hydraulic cylinder is connected between the telescopic arm (503) and the rotating seat (502). A hook (504) is provided at the end of the telescopic arm (503) away from the rotating seat (502).

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