Rotating handrail and railway flat car

Abstract

The application discloses a rotating handrail and a railway flat car, and belongs to the transportation field. The handrail seat of the rotating handrail is fixedly connected to a car body, and the handrail body is rotatably connected to the handrail seat. The locking mechanism comprises a locking part and a movable part. When the handrail body is rotated to a working position or a non-working position, the movable part is locked with the locking part to limit the rotation of the handrail body relative to the handrail seat. When the handrail body is rotated to the working position, the vertical height of the free end is greatly increased. When the handrail body is rotated to the non-working position, the vertical height of the free end is reduced. The locking part and the movable part are mechanically hard-connected, effectively resist the continuous vibration in the running of the vehicle, prevent the handrail body from accidentally shaking or loosening, and are stable and reliable in structure. The rotating handrail is fixedly installed with the vehicle, and does not need to be carried by the shunting personnel at each operation site, so that the weight burden of the shunting personnel is eliminated. The handrail does not depend on the original handrail or column insertion structure of the railway flat car, and can be applied to various flat cars by only fixing the handrail seat to the side beam of the vehicle, and is widely applicable.

Description

Technical Field

[0001] This application relates to the field of transportation technology, and in particular to a rotating handrail and a railway flatcar. Background Technology

[0002] Shunting is a crucial part of railway freight transport. During shunting operations, shunting personnel stand on the footrests of the side beams of the railway flatcars, holding onto the handrails, and ride alongside the car.

[0003] In related technologies, such as Figure 1 As shown, the handrails of railway flatcars are mostly fixed and installed at a low height, usually below the load-bearing surface of the flatcar. When shunting personnel board the car, they cannot stand upright and must bend over to use them, which increases the labor intensity of the shunting personnel. At the same time, in this posture, shunting personnel face the vehicle and have to turn their heads to look ahead when observing the road conditions, which is extremely inconvenient. In special circumstances, shunting personnel may even need to hold the handrail with one hand and release the other hand to operate equipment such as radios or flashlights, further increasing the difficulty of operation and the safety risk of falling.

[0004] In related technologies, fixed handrails with low height have problems such as low efficiency in inspection and loading / unloading operations and increased accident rate.

[0005] To address the problems caused by the aforementioned fixed handrails with low height, an auxiliary rotating handrail 0200 was developed.

[0006] like Figure 2 As shown, the auxiliary rotating handrail 0200 includes a handrail portion 0210, a connecting rod 0220, a bottom support assembly 0230, and a side support assembly 0240. The bottom support assembly 0230 and the side support assembly 0240 are respectively engaged with the vertical and horizontal bars of the original handrail of the railway flatcar, and the handrail portion 0210 extends outward from above to temporarily increase the vertical height of the gripping part.

[0007] The auxiliary rotating handrail needs to be carried on-site by shunting personnel during shunting operations. It has a certain weight, and carrying it frequently will put a certain burden on the shunting personnel, which is quite inconvenient. The structure of the auxiliary rotating handrail connecting with the vertical and horizontal bars of the original handrail of the railway flatcar needs to be designed specifically for the original handrail of the railway flatcar. When the structure and / or size of the handrail of the vehicle changes, the auxiliary rotating handrail cannot be universally adapted. The auxiliary rotating handrail has a large number of parts and a complex structure, which makes the operation steps cumbersome, time-consuming and laborious. Moreover, its overall structural strength and long-term stability are difficult to guarantee, posing safety hazards.

[0008] In summary, how to provide a handrail that is height-adjustable, fixed in the vehicle, easy to operate, and stable and reliable has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0009] This application proposes a height-adjustable, vehicle-mounted, easy-to-operate, and stable rotating handrail. This application also proposes a railway flatcar with the aforementioned rotating handrail.

[0010] To achieve the above objectives, in a first aspect, this application provides a rotating handrail, including a handrail base, a handrail body, and a locking mechanism;

[0011] The armrest seat can be fixedly connected to the vehicle body;

[0012] The handrail body includes a fixed end and a free end arranged opposite to each other. The fixed end is rotatably connected to the handrail seat so that the handrail body can rotate between a working position and a non-working position. The rotation axis of the handrail body is in the horizontal direction. When the handrail body is in the working position, the vertical height of the free end is higher than that when the handrail body is in the non-working position.

[0013] The locking mechanism includes a locking part and a movable part. The locking part is located at the fixed end and is rotatably connected to the armrest seat. The locking part rotates synchronously with the fixed end.

[0014] The movable part is movably disposed on the armrest seat. The movable part is used to lock with the locking part when the armrest body is rotated to the working position or the non-working position, so as to restrict the rotation of the armrest body relative to the armrest seat.

[0015] Optionally, in the above-mentioned rotating armrest, the movable part is slidably connected to the armrest seat;

[0016] The movable part includes an elongated hole and a round hole that are disposed along the sliding direction of the movable part and are interconnected. The elongated hole is opened along the sliding direction of the movable part.

[0017] The locking part includes a planar segment and an arc segment. Along the sliding direction perpendicular to the movable part, the width of the elongated hole is smaller than the diameter of the circular hole. The elongated hole is clearance-fitted with the planar segment, and the circular hole is clearance-fitted with the arc segment.

[0018] Optionally, in the above-mentioned rotating handrail, the fixed end is rotatably connected to the handrail base via a rotating assembly;

[0019] The rotating assembly includes a fixed pin and a rotating sleeve. The fixed pin is connected to the armrest seat, and the rotating sleeve is fitted onto the fixed pin. The rotating sleeve is connected to the armrest body, and the rotating sleeve is provided with a locking part.

[0020] Optionally, in the above-mentioned rotating armrest, the end of the fixing pin away from the armrest seat is provided with an external thread;

[0021] The rotating assembly also includes a stop washer and a nut. The nut is connected to the fixing pin via the external thread. The nut is used to restrict the movement of the rotating sleeve along the axial direction of the fixing pin. The stop washer is used to lock the relative position of the nut and the fixing pin.

[0022] Optionally, in the above-mentioned rotating armrest, two guide plates arranged opposite to each other are provided on the armrest seat, and a guide space is formed between the two guide plates. The movable part is slidably limited within the guide space.

[0023] Optionally, in the aforementioned rotating armrest, at least a portion of the guide plate facing the guide space and away from the armrest seat is in the shape of an inner arc or a hook, in order to limit and guide the movable part.

[0024] Optionally, in the above-mentioned rotating armrest, the movable part is a plate-like structure, and the width of the movable part gradually decreases along the sliding direction of the movable part;

[0025] The width of the movable part at one end corresponding to the circular hole is smaller than the width of the movable part at one end corresponding to the elongated hole;

[0026] The wider end of the movable part is interference-fitted with the guide space.

[0027] Optionally, in the above-mentioned rotating handrail, the handrail body includes a handrail frame;

[0028] The lower end of the armrest frame is provided with a mounting plate and a mounting sleeve. The mounting plate has a mounting hole for the mounting sleeve to pass through. The mounting plate is rotatably connected to the armrest seat through the mounting sleeve.

[0029] Optionally, in the above-mentioned rotating handrail, a connecting rod is provided inside the handrail frame. The connecting rod is located within the space enclosed by the handrail frame and is connected to the handrail frame.

[0030] A reinforcing member is provided inside the handrail frame. The reinforcing member is located within the space enclosed by the handrail frame and the connecting rod to improve the strength of the handrail frame.

[0031] Secondly, this application also provides a railway flatcar, comprising:

[0032] The vehicle body includes side beams; and

[0033] The rotating handrail as described in any of the above embodiments is fixedly installed on the side beam.

[0034] This application provides a rotating handrail. The handrail base is directly fixed to the vehicle body, and the handrail body is rotatably connected to the handrail base. The handrail body can switch between a working position and a non-working position. The locking mechanism includes a locking part that rotates synchronously with the fixed end and a movable part disposed on the handrail base. When the handrail body rotates to the working position or the non-working position, the movable part and the locking part lock together, directly restricting the rotation of the handrail body relative to the handrail base. When the handrail body rotates to the working position, the vertical height of the free end increases significantly, allowing shunting personnel to stand upright while riding, grasp the handle with both hands without bending over, and observe without turning their heads. In special circumstances, it can also stably operate the radio or flashlight with one hand, greatly reducing labor intensity and the risk of falls, and improving the efficiency of riding inspection and loading / unloading operations. When the handrail body rotates to the non-working position, the vertical height of the free end decreases, and the entire handrail is placed outside the vehicle body, without affecting the normal transportation of the vehicle. The locking and moving parts are mechanically rigidly connected, effectively resisting continuous vibrations during railway vehicle operation and preventing accidental shaking or loosening of the handrail, ensuring structural stability and reliability. The rotating handrail is fixedly installed with the vehicle, eliminating the need for shunting personnel to carry it to the site for each operation, thus reducing their weight burden. This handrail does not rely on any existing handrails or column inserts on the railway flatcar, requiring no customization for different vehicle models; simply fixing the handrail base to the vehicle's side beam is sufficient for use with various flatcars, offering strong interchangeability and a wide range of applications.

[0035] This application also provides a railway flatcar. The railway flatcar includes a car body and a rotating handrail as described above. The car body includes side beams, and the rotating handrail is mounted on the side beams. Since the rotating handrail has the aforementioned technical effects, the railway flatcar with this rotating handrail also has the same technical effects, which will not be elaborated further here. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some examples or embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort, and this application can be applied to other similar scenarios based on the provided drawings. Unless obvious from the linguistic context or otherwise specified, the same reference numerals in the drawings represent the same structures or operations.

[0037] Figure 1 This is a structural diagram of the handrail provided by the relevant technology;

[0038] Figure 2 This is a structural schematic diagram of the auxiliary rotating handrail provided by related technologies;

[0039] Figure 3This is a schematic diagram of the rotating handrail provided in the embodiment of this application when it is in the working position;

[0040] Figure 4 This is a front view of the rotating armrest provided in an embodiment of this application;

[0041] Figure 5 This is a side view of the rotating armrest provided in an embodiment of this application;

[0042] Figure 6 This is a schematic diagram of the rotating handrail provided in the embodiment of this application when it is in a non-working position;

[0043] Figure 7 This is a schematic diagram of the connection between the armrest, the movable part, and the rotating assembly (without locking the movable part) provided in the embodiments of this application;

[0044] Figure 8 This is a schematic diagram of the connection between the armrest, the movable part, and the rotating assembly (locking movable part) provided in the embodiments of this application;

[0045] Figure 9 This is a schematic diagram of the connection between the armrest seat and the fixing pin provided in an embodiment of this application;

[0046] Figure 10 This is a schematic diagram of the armrest seat provided in an embodiment of this application;

[0047] Figure 11 This is a front view of the armrest provided in an embodiment of this application;

[0048] Figure 12 This is a schematic diagram of the structure of the handrail body provided in the embodiment of this application;

[0049] Figure 13 This is a structural schematic diagram of the handrail frame provided in an embodiment of this application;

[0050] Figure 14 This is a schematic diagram of the structure of the active part provided in the embodiment of this application;

[0051] Figure 15 This is a schematic diagram of the structure of the fixing pin provided in an embodiment of this application;

[0052] Figure 16 This is a schematic diagram of a portion of the rotating sleeve provided in an embodiment of this application;

[0053] Figure 17 This is a cross-sectional view of the rotating sleeve provided in an embodiment of this application.

[0054] The annotations in the attached figures are explained as follows:

[0055] 0100 Handrail;

[0056] 0200 Auxiliary rotating armrest; 0210 Handrail; 0220 Connecting rod; 0230 Bottom support assembly; 0240 Side support assembly;

[0057] 100 armrest seat; 110 guide plate;

[0058] 200 Handrail body; 210 Handrail frame; 220 Mounting plate; 230 Mounting sleeve; 240 Connecting rod; 250 Reinforcing member; 260 Fixed end; 270 Free end;

[0059] 300 Locking mechanism; 310 Locking part; 320 Moving part; 321 Elongated hole; 322 Round hole;

[0060] 400 Rotating assembly; 410 Fixed pin; 420 Rotating sleeve; 421 Flat section; 422 Arc section; 430 Nut. Detailed Implementation

[0061] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the application and not intended to limit it. The described embodiments are only a part of the embodiments of the present application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without inventive effort are within the scope of protection of the present application.

[0062] It should be noted that, for ease of description, only the parts relevant to the application are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0063] The inventors discovered that in railway freight shunting operations, the handrails of flatcars are mostly fixed structures with low vertical height. When shunting personnel are on board, the low handrail position prevents them from standing upright, forcing them to maintain a bent-over posture for extended periods, significantly increasing their workload. Furthermore, this unnatural working posture forces personnel to turn their heads to observe the road conditions while facing the side of the vehicle, hindering movement. Operating handheld equipment also requires holding the handrail with one hand, increasing the risk of falls. While temporary auxiliary rotating handrails exist in related technologies, these are independent components of the flatcar, requiring personnel to carry them and adapting them to different flatcar designs. This results in poor versatility, cumbersome operation, and difficulty in guaranteeing structural strength and stability.

[0064] In view of this, in a first aspect, the present application provides a rotating handrail. According to the rotating handrail, a handrail body capable of rotating relative to a handrail base is provided, and a locking mechanism is used to lock the handrail body at a working position or a non-working position. In this way, without requiring shunting personnel to carry any additional auxiliary tools, the vertical height of the handrail can be significantly increased at the working position, so that the shunting personnel can work in an upright posture, thereby effectively reducing labor intensity and safety risks. Meanwhile, when no operation is required, the handrail body can be flipped to the non-working position, so that the entire rotating handrail is located outside the side beam of the vehicle, and the vertical height is reduced below the bearing surface, so as to meet the requirements of rolling stock clearance and avoid interference with cargo loading.

[0065] The rotating handrail provided by the embodiments of the present application can be applied to railway flatcars, and can also be applied to other handrail devices requiring height adjustment. Hereinafter, the rotating handrail being applied to a railway flatcar will be taken as an example for description.

[0066] The technical solutions of the present application will be described in detail below with reference to specific embodiments and the accompanying drawings.

[0067] In some embodiments of the present application, the rotating handrail provided by the embodiments of the present application includes a handrail base, a handrail body, and a locking mechanism.

[0068] Please refer to Figures 7-11 , the structure of the handrail base will be described in detail.

[0069] The handrail base can be fixedly connected to a vehicle body, and serves as the mounting base for the entire rotating handrail.

[0070] In some embodiments of the present application, as shown in Figure 10 , the handrail base adopts a "几"-shaped steel structure. The "几"-shaped steel structure includes a middle plate, side plates and folded edges. Along the length direction of the middle plate, two ends of the middle plate are respectively provided with the side plates, the two side plates are located on the same side of the plane where the middle plate is located, the included angle between each side plate and the middle plate is 80°-100°, one end of each side plate away from the middle plate is provided with the folded edge, and the folded edge is an outward turned folded edge.

[0071] The handrail base disclosed in the above embodiments is beneficial to be installed by fitting the contour of the vehicle side beam.

[0072] There are various connection modes between the handrail base and the vehicle side beam.

[0073] In some embodiments of the present application, a plurality of rivet holes are formed in the handrail base, and the handrail base is fixedly riveted to the vehicle side beam by means of blind rivets and collars matched with the rivet holes.

[0074] Riveting has the advantages of high connection strength and good shock resistance, making it suitable for railway vehicles that are subjected to long-term vibration and impact.

[0075] The armrest base 100 includes, but is not limited to, the shapes described above, and the specific shape may be selected by those skilled in the art based on actual needs. When a rotating armrest is required for use in other equipment, the armrest base 100 may also serve as a support, and may be fixed to a suitable position on other equipment by means of bolting or welding.

[0076] The armrest base 100 is also provided with a first through hole and a blind slot, wherein the blind slot is used for positioning and assembling the guide plate 110. The fixing pin 410 passes through the first through hole and is welded to the armrest base 100 to ensure the stability of the connection. Optionally, the armrest base 100 may also be provided with a second through hole for other auxiliary fixing connections, such as wire binding.

[0077] Continue reading Figure 9 Two guide plates 110 are welded and assembled into two pre-drilled blind slots on the armrest seat 100. The two guide plates 110 are arranged opposite each other, forming a guide space between them, within which the movable part 320 is slidably limited. The guide space formed by the guide plates 110 not only enables the sliding connection between the movable part 320 and the armrest seat 100, but also guides the movement of the movable part 320.

[0078] Optionally, at least a portion of the guide plate 110 facing the guide space and away from the armrest seat 100 is in the shape of an inner arc or a hook, which can guide and limit the movable part 320, ensuring that the movable part 320 can only reciprocate within the guide space defined by the two guide plates 110, while effectively preventing the movable part 320 from falling off in a direction perpendicular to its direction of movement. The guide plate 110 and the armrest seat 100 are connected by welding, ensuring the reliability of the connection.

[0079] Since the force exerted by the handrail body 200 and the operator is transmitted to the handrail seat 100 through the rotating connection, in some embodiments of this application, the handrail seat 100 is also provided with stiffening plates. The stiffening plates are welded to the bending points and / or stress concentration areas of the handrail seat 100. The stiffening plates can increase the tensile strength and bending strength of the overall structure of the handrail seat 100, prevent the handrail seat 100 from fatigue fracture during long-term use, and ensure the working safety of shunting personnel.

[0080] In the description of the embodiments of this application, unless otherwise stated, " / " means "or", for example, A / B can mean A or B; "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more.

[0081] Please see Figure 12 and Figure 13 The structure of the handrail body 200 is described in detail.

[0082] The handrail body 200 includes a fixed end 260 and a free end 270 arranged opposite to each other, wherein the fixed end 260 is rotatably connected to the handrail seat 100 so that the handrail body 200 can rotate between a working position and a non-working position.

[0083] In some embodiments of this application, the working position of the handrail body 200 is when the free end 270 of the handrail body 200 is above the fixed end 260, and the non-working position of the handrail body 200 is when the free end 270 of the handrail body 200 is below the fixed end 260.

[0084] The rotation axis of the handrail body 200 is horizontal. When the handrail body 200 is in the working position, the vertical height of the free end 270 is higher than that when the handrail body 200 is in the non-working position.

[0085] In some embodiments of this application, please refer to Figure 12 The handrail body 200 includes a handrail frame 210. The handrail frame 210 is the part that shunting personnel directly grasp, and the handrail frame 210 can be a U-shaped or rectangular frame structure formed by bending round steel.

[0086] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0087] like Figure 12 and Figure 13 As shown, this is an embodiment where the handrail frame 210 is a rectangular frame. The length direction of the handrail frame 210 extends from the fixed end 260 to the free end 270. The handrail frame 210 includes two long rods arranged along its length and two short rods arranged along its width. The lower first short rod is located at the fixed end 260 of the handrail frame 210 and is rotatably connected to the handrail base 100, while the upper second short rod is located at the free end 270 of the handrail frame 210.

[0088] A connecting rod 240 is provided inside the handrail frame 210. Optionally, the connecting rod 240 is parallel to the short rod. The connecting rod 240 is located at the middle position along its own length direction and is located inside the handrail frame 210. The two ends of the connecting rod 240 along its own length direction are respectively connected to the two long rods of the handrail frame 210.

[0089] The connecting rod 240 enhances the bending and torsional resistance of the handrail frame 210, thereby improving the overall structural stability of the handrail frame 210.

[0090] The handrail frame 210 also includes a mounting plate 220 and a mounting sleeve 230. (See further...) Figure 12 The mounting plate 220 is disposed between the connecting rod 240 and the second short rod. The mounting plate 220 has a mounting hole for the mounting sleeve 230 to pass through. The mounting sleeve 230 is rotatably connected to the armrest seat 100.

[0091] The mounting plate 220 is welded to the end of the armrest frame 210, making the upper part of the armrest body 200 more spacious for gripping and more ergonomic.

[0092] Continue reading Figure 12 The mounting plate 220 is provided with reinforcing plates. Multiple reinforcing plates are arranged radially along the circumferential direction of the mounting sleeve 230 to strengthen the strength of various positions of the mounting plate 220.

[0093] The reinforcement plate further ensures the reliability of the handrail body 200 structure, ensuring that it will not break when bearing the weight of the shunting personnel.

[0094] like Figure 8 As shown, the armrest body 200 is rotatably connected to the armrest seat 100 via a rotating assembly 400. The rotating assembly 400 includes a fixing pin 410 and a rotating sleeve 420.

[0095] Optionally, the fixing pin 410 is made of high-strength alloy steel to ensure the strength of the fixing pin 410.

[0096] The tail of the fixing pin 410 is chamfered and welded to the armrest seat 100. The head of the fixing pin 410 is provided with external threads for fastening with the nut 430 described below. The middle part of the fixing pin 410 is a smooth cylindrical surface. The inner hole of the rotating sleeve 420 forms a clearance fit with the cylindrical surface of the middle part of the fixing pin 410, allowing the armrest body 200 to rotate freely around the axis of the fixing pin 410.

[0097] The head of the fixing pin 410 is also provided with an annular groove, and a locking washer is provided in the annular groove to prevent loosening and lock the relative position of the nut 430 and the fixing pin 410, which is suitable for railway applications with multiple impacts and vibrations.

[0098] The rotating sleeve 420 may optionally be made of high-strength alloy steel to ensure wear resistance and strength. The rotating sleeve 420 is fixedly connected to the mounting sleeve 230 provided inside the handrail frame 210.

[0099] In this design, the handrail body 200 is axially fastened by the clearance fit between the rotating sleeve 420 and the fixing pin 410, and by the stop washer and nut 430, allowing the handrail body 200 to rotate relative to the handrail seat 100.

[0100] The rotating sleeve 420 has a flat section 421 and an arc section 422 on the outer wall corresponding to the movable part 320, so as to form an elongated oval structure in the rotating sleeve 420. The diameter of the circumference of the arc section 422 is equal to the diameter of the circumference of the outer wall of the rotating sleeve 420.

[0101] The movable part 320 includes an elongated hole 321 and a round hole 322 that are disposed along the sliding direction of the movable part 320 and are interconnected. The elongated hole 321 is opened along the sliding direction of the movable part 320. The elongated hole 321 is slidably engaged with the planar section 421, and the round hole 322 is clearance engaged with the arc section 422.

[0102] The movable part 320 is fitted onto the rotating sleeve 420 through the circular hole 322. After the movable part 320 slides along the axis of the rotating sleeve 420 to the oblong structure, and the circular hole 322 corresponds to the oblong structure, the movable part 320 can rotate relative to the rotating sleeve 420. The movable part 320 is pushed and rotated along the length of the elongated hole 321 until the wall of the elongated hole 321 fits against the planar section 421 of the oblong structure. At this time, the relative position of the movable part 320 and the rotating sleeve 420 is locked, and no relative movement can occur.

[0103] The interior of the rotating sleeve 420 can be slotted, and a felt impregnated with grease is placed in the slot to provide lubrication for the mating surfaces of the rotating sleeve 420 and the fixed pin 410, thereby avoiding direct friction and wear between metal parts, ensuring smooth and fluid rotation of the handrail body 200, and extending its service life.

[0104] The locking mechanism 300 includes a locking part 310 and a movable part 320. The locking part 310 is located at the fixed end 260 and is rotatably connected to the armrest seat 100. The locking part 310 rotates synchronously with the fixed end 260. The movable part 320 is movably mounted on the armrest seat 100. The movable part 320 is used to lock into the locking part 310 when the armrest body 200 rotates to the working position or the non-working position, so as to restrict the rotation of the armrest body 200 relative to the armrest seat 100.

[0105] Please see Figure 7 and Figure 8 The structure of the locking mechanism 300 is described in detail.

[0106] The active section 320 is a plate-shaped structure adapted to the shape of the guide space. For ease of subsequent description, this plate-shaped structure will be named the transposition plate.

[0107] A circular hole 322 and an elongated hole 321 are formed on the transposition plate. The width of the end of the transposition plate with the circular hole 322 is smaller than the width of the end of the transposition plate with the elongated hole 321.

[0108] Optionally, the sliding direction of the transposition plate may be, but is not limited to, the vertical direction, and may be any direction within the vertical plane.

[0109] In an embodiment where the sliding direction of the transposition plate is vertical, the elongated hole 321 is located above the circular hole 322.

[0110] The transposition plate falls under its own weight, and the wider end of the transposition plate is blocked and positioned by two guide plates 110.

[0111] The top and bottom of the handrail 100 extend from the upper and lower ends of the shift plate, respectively, allowing shunting personnel to easily grasp the upper and lower ends of the shift plate, providing a leverage point for its vertical movement and making operation more convenient.

[0112] The transposition plate can be made of high-strength weather-resistant steel. High-strength weather-resistant steel is not easily corroded, ensuring long-term reliability in outdoor environments.

[0113] The elongated oval feature on the rotating sleeve 420 serves as the locking part 310, and the rotating sleeve 420 rotates synchronously with the handrail body 200. When the handrail body 200 is in a non-working position or a locked working position, the shift plate falls under its own weight, and the wall of the elongated hole 321 of the shift plate slides into contact with the planar section 421 of the elongated oval feature of the rotating sleeve 420. Since the elongated hole 321 is opened along the sliding direction of the shift plate, and the width of the elongated hole 321 matches the thickness of the elongated oval feature of the rotating sleeve 420 (here, the matching is a clearance fit), this fit restricts the rotation of the rotating sleeve 420 from rotating around the axis of the fixing pin 410, thus achieving locking. When it is necessary to switch working positions, the shunting personnel pull the shift plate upward, causing the shift plate to slide vertically upward until the elongated oval feature of the rotating sleeve 420 disengages from the elongated hole 321 of the shift plate and aligns with the circular hole 322 of the shift plate. Because the diameter of the circular hole 322 is larger than the width of the oblong feature of the rotating sleeve 420 (the diameter of the circular hole 322 is slightly larger than the circumscribed circle diameter of the oblong feature), the rotating sleeve 420 and the armrest body 200 connected to it can rotate freely around the axis of the fixing pin 410. After the armrest body 200 rotates about 180°, the oblong feature of the rotating sleeve 420 is once again aligned with the elongated hole 321 of the shift plate. At this time, the shift plate is released, and the shift plate falls under its own gravity. Its elongated hole 321 engages with the oblong feature of the rotating sleeve 420 again, achieving automatic locking.

[0114] The working process of the rotating handrail is as follows:

[0115] When railway flatcars are normally traveling on the line to transport goods, such as Figure 6 As shown, the rotating handrail is in its non-working position, with the handrail body 200 located outside the vehicle's side beam. Its vertical height is below the vehicle's load-bearing surface, and its overall outline does not exceed the locomotive and rolling stock clearance limits. The handrail body 200 will not interfere with the loading and transportation of goods from tracked or wheeled vehicles. In the non-working position, the shift plate is clamped and locked by two guide plates 110. The elongated hole 321 of the shift plate engages with the elongated oval feature of the rotating sleeve 420, restricting the position of the rotating sleeve 420 and fixing the overall position of the handrail body 200, preventing it from moving or flipping.

[0116] When shunting operations are required, the shunting personnel first lift the shift plate upwards. Due to the vertical guiding effect of the guide plate 110, the shift plate slides vertically upwards. When the circular hole 322 feature on the shift plate moves to the same height as the elongated oval feature of the rotating sleeve 420, the rotation restriction of the rotating sleeve 420 is released because the inner diameter of the circular hole 322 is larger than the outer contour of the elongated oval feature of the rotating sleeve 420. The shunting personnel can then hold the handrail 200 and rotate it upwards around the axis of the fixing pin 410. During the rotation, due to its own weight, the lower edge of the circular hole 322 of the shift plate remains in contact with the outer wall of the rotating sleeve 420, but because the diameter of the circular hole 322 is relatively large, it does not hinder the rotation of the rotating sleeve 420. After the handrail 200 rotates approximately 180°, the free end 270 of the handrail 200 rotates from the lowest vertical point to the highest vertical point. At this point, the handrail 200 reaches the working position. Figures 3-5 As shown. In the working position, the elongated oval feature of the rotating sleeve 420 rotates again to a position that matches the elongated hole 321 of the shifting plate. Subsequently, the shunting personnel release the shifting plate, and the shifting plate automatically falls along the guide space enclosed by the guide plate 110 under its own gravity, and its elongated hole 321 engages with the elongated oval feature of the rotating sleeve 420 again.

[0117] The hook-shaped or arc-shaped structure of the guide plate 110 restricts the horizontal displacement of the shift plate, and the upper-wide and lower-narrow structure of the shift plate makes it form an interference fit or wedge tightness with the guide space, so that the shift plate is firmly locked, thereby locking the rotating sleeve 420 and the entire handrail body 200 in the working position. At this time, the vertical height of the free end 270 of the handrail body 200 is significantly increased compared with the non-working position, allowing shunting personnel to stand upright and hold the handrail body 200 to perform shunting operations.

[0118] Because the rotating sleeve 420 and the fixed pin 410 are clearance-fitted and lubricated, the flipping action of the handrail body 200 is smooth and effortless. The entire conversion process requires no tools, and the purely mechanical structure ensures high reliability. When the shunting operation is completed and the handrail needs to be returned to the non-working position, simply pull up the shift plate again to unlock it, flip the handrail body 200 in the opposite direction by about 180°, and the shift plate will automatically fall and lock again.

[0119] Secondly, this application also provides a railway flatcar. The railway flatcar includes a car body and a rotating handrail as described above. The car body includes side beams, and the rotating handrail is mounted on the side beams.

[0120] Since the rotating handrail has the aforementioned technical effects, the railway flatcar with the rotating handrail also has the same technical effects, which will not be elaborated here.

[0121] When shunting operations are carried out, railway flatcars with rotating handrails in the above embodiments can provide shunting personnel with handrails of suitable height and stable and reliable support, effectively reducing the difficulty of operation and safety risks.

[0122] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed, and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. The scope of this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described application concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A rotating handrail, characterized in that, It includes an armrest base (100), an armrest body (200), and a locking mechanism (300). The armrest seat (100) can be fixedly connected to the vehicle body; The handrail body (200) includes a fixed end (260) and a free end (270) arranged opposite to each other. The fixed end (260) is rotatably connected to the handrail seat (100) so that the handrail body (200) can rotate between a working position and a non-working position. The rotation axis of the handrail body (200) is in the horizontal direction. When the handrail body (200) is in the working position, the vertical height of the free end (270) is higher than the vertical height of the free end (270) when the handrail body (200) is in the non-working position. The locking mechanism (300) includes a locking part (310) and a movable part (320). The locking part (310) is located at the fixed end (260) and is rotatably connected to the armrest seat (100). The locking part (310) rotates synchronously with the fixed end (260). The movable part (320) is movably disposed on the armrest seat (100). The movable part (320) is used to lock with the locking part (310) when the armrest body (200) rotates to the working position or the non-working position, so as to restrict the rotation of the armrest body (200) relative to the armrest seat (100).

2. The rotating armrest according to claim 1, characterized in that, The movable part (320) is slidably connected to the armrest seat (100); The movable part (320) includes an elongated hole (321) and a round hole (322) that are disposed along the sliding direction of the movable part (320) and communicate with each other. The elongated hole (321) is opened along the sliding direction of the movable part (320). The locking part (310) includes a planar segment (421) and an arc segment (422). Along the sliding direction perpendicular to the movable part (320), the width of the elongated hole (321) is smaller than the diameter of the circular hole (322). The elongated hole (321) is in clearance fit with the planar segment (421), and the circular hole (322) is in clearance fit with the arc segment (422).

3. The rotating armrest according to claim 2, characterized in that, The fixed end (260) is rotatably connected to the armrest seat (100) via a rotating assembly (400); The rotating assembly (400) includes a fixing pin (410) and a rotating sleeve (420). The fixing pin (410) is connected to the armrest seat (100), and the rotating sleeve (420) is sleeved on the fixing pin (410). The rotating sleeve (420) is connected to the armrest body (200), and the locking part (310) is provided on the rotating sleeve (420).

4. The rotating armrest according to claim 3, characterized in that, The fixed pin (410) has an external thread at the end away from the armrest seat (100); The rotating assembly (400) further includes a stop washer and a nut (430), the nut (430) being connected to the fixing pin (410) via the external thread, the nut (430) being used to restrict the movement of the rotating sleeve (420) along the axial direction of the fixing pin (410), and the stop washer being used to lock the relative position of the nut (430) and the fixing pin (410).

5. The rotating armrest according to claim 2, characterized in that, The armrest seat (100) is provided with two guide plates (110) arranged opposite to each other, and a guide space is formed between the two guide plates (110). The movable part (320) is slidably limited within the guide space.

6. The rotating armrest according to claim 5, characterized in that, At least a portion of the guide plate (110) facing the guide space and away from the armrest seat (100) is in the shape of an inner arc or a hook to limit and guide the movable part (320).

7. The rotating armrest according to claim 5, characterized in that, The movable part (320) has a plate-like structure, and the width of the movable part (320) gradually decreases along the sliding direction of the movable part (320); The width of the movable part (320) at one end corresponding to the circular hole (322) is smaller than the width of the movable part (320) at one end corresponding to the elongated hole (321); The wider end of the active part (320) is interference-fitted with the guide space.

8. The rotating armrest according to claim 1, characterized in that, The armrest body (200) includes an armrest frame (210). The lower end of the armrest frame (210) is provided with an mounting plate (220) and a mounting sleeve (230). The mounting plate (220) has a mounting hole for the mounting sleeve (230) to pass through. The mounting plate (220) is rotatably connected to the armrest seat (100) through the mounting sleeve (230).

9. The rotating armrest according to claim 8, characterized in that, A connecting rod (240) is provided inside the handrail frame (210). The connecting rod (240) is located within the space enclosed by the handrail frame (210) and is connected to the handrail frame (210). A reinforcing member (250) is provided inside the handrail frame (210). The reinforcing member (250) is located in the space enclosed by the handrail frame (210) and the connecting rod (240) to improve the strength of the handrail frame (210).

10. A railway flatcar, characterized in that, include: The vehicle body includes side beams; and The rotating handrail as described in any one of claims 1-9, wherein the rotating handrail is fixedly installed on the side beam.

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