Suspension vehicle, running frame, running system and vehicle

Abstract

This application provides a running frame, running system, and vehicle for a suspended vehicle. The running frame includes: a frame body; a hollow box-shaped structure in the middle of the frame body, with the top two ends of the frame body extending in opposite directions to form frame ends; the internal space of the box-shaped structure in the middle of the frame body serves as a first accommodating space, and the space below the frame ends serves as a second accommodating space; a motor mounting base, disposed on the upper surface of the bottom wall in the middle of the frame body, for mounting a traction motor, which is placed in the first accommodating space; a gearbox mounting base, disposed on the lower surface of the frame ends, for mounting a gearbox, which is placed in the second accommodating space; and a suspension mounting base, disposed on the lower surface of the bottom wall in the middle of the frame body, for mounting a suspension system. The running frame, running system, and vehicle for a suspended vehicle provided by this application can improve the vehicle's driving stability and reliability.

Description

Technical Field

[0001] This application relates to suspended rail transit technology, and more particularly to a running frame, running system and vehicle for a suspended vehicle. Background Technology

[0002] Suspended transportation systems are a new type of transportation system with advantages such as low cost, fast construction, low construction threshold, and small footprint, and are being introduced by more and more cities.

[0003] Unlike traditional rail transit, suspended rail systems typically use box girders with an open lower section. The vehicle's running gear travels within these box girders, and the carriages are connected to the running gear via a suspension system. As a key component, the running gear differs significantly from the bogies of traditional rail vehicles in terms of its frame, axles, suspension, traction, and braking. The frame, as the main skeleton of the bogie, is the core component of the running gear, connecting various parts and transmitting and bearing loads. Its structural strength and fatigue load strength must meet the axle load requirements of the vehicle. With the continuous development of suspended rail transit systems, the need to meet the dual demands of "tourism + transportation" is becoming increasingly urgent, requiring the suspended running gear frame to achieve technical characteristics such as lower axle load, lower carrying capacity, and lower cost. Summary of the Invention

[0004] To address one of the aforementioned technical deficiencies, this application provides a running frame, running system, and vehicle for a suspended vehicle.

[0005] According to a first aspect of the embodiments of this application, a running frame for a suspended vehicle is provided, comprising: The main structure; the middle part of the main structure is a hollow box-shaped structure, and the top two ends of the main structure extend in opposite directions to form the end of the structure; the internal space of the box-shaped structure in the middle of the main structure serves as the first accommodating space, and the space below the end of the structure serves as the second accommodating space; The motor mounting bracket is located on the upper surface of the bottom wall in the middle of the main frame and is used to install the traction motor, which will be placed in the first receiving space. A gearbox mounting base, located on the lower surface of the end of the frame, is used to mount the gearbox, which will be placed in the second receiving space; The hanging mounting base is located on the lower surface of the bottom wall in the middle of the main frame and is used to install the hanging system.

[0006] According to a second aspect of the embodiments of this application, a running system for a suspended vehicle is provided, including: the running frame as described above.

[0007] According to a third aspect of the embodiments of this application, a suspended vehicle is provided, including: a carriage and a running system as described above, wherein the carriage is suspended below the running system.

[0008] The technical solution provided in this application embodiment includes a frame body with a hollow box-shaped structure in the middle, which effectively improves the overall rigidity of the frame. The top two ends of the frame body extend in opposite directions to form frame ends. The internal space of the box-shaped structure in the middle of the frame body serves as a first accommodating space, and the space below the frame ends serves as a second accommodating space. A motor mounting base is located on the upper surface of the bottom wall in the middle of the frame body for mounting a traction motor, which is placed in the first accommodating space. A gearbox mounting base is located on the lower surface of the frame ends for mounting a gearbox, which is placed in the second accommodating space. A suspension mounting base is located on the lower surface of the bottom wall in the middle of the frame body for mounting a suspension system. This solution is suitable for mounting a traction motor in the middle of the frame, which can improve the "nodding motion" that occurs in traditional solutions where a heavy traction motor is placed at both ends of the frame, thus improving vehicle driving stability and reliability. Attached Figure Description

[0009] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the structure of the suspended vehicle running system provided in the embodiments of this application; Figure 2 This is a partial structural schematic diagram of the suspended vehicle running system provided in an embodiment of this application; Figure 3 This is an exploded view of a portion of the structure of a suspended vehicle running system provided in an embodiment of this application; Figure 4 This is a partial structural schematic diagram of the suspended vehicle running system provided in an embodiment of this application; Figure 5 This is a schematic diagram of the running frame in the suspended vehicle running system provided in the embodiments of this application; Figure 6 This is a schematic diagram of the running frame of the suspended vehicle running system provided in an embodiment of this application from another angle. Figure 7 This is a structural schematic diagram of the lower cover plate of the traveling frame provided in the embodiments of this application; Figure 8 This is a partial structural diagram of the traveling frame provided in an embodiment of this application.

[0010] Figure label: 11-Traveling frame; 111-Frame main body; 1111-Frame lower cover plate; 1112-First frame side upright plate; 1113-Second frame side upright plate; 1114-Frame upper cover plate; 1115-Frame end bottom plate; 1116-Third frame side upright plate; 1117-Side bending plate; 1118-Recessed part; 112-Motor mounting bracket; 113-Gearbox mounting bracket; 114-Hanging mounting bracket; 115-Guide wheel mounting bracket; 116-Safety wheel mounting bracket; 12-Traction motor; 13-Gearbox; 14-Running wheel; 15-Guide wheel; 16-Current receiver; 17-Safety wheel; 181-Brake disc; 182-Brake caliper; 2-Suspension system. Detailed Implementation

[0011] To make the technical solutions and advantages of the embodiments of this application clearer, the exemplary embodiments of this application will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not an exhaustive list of all embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0012] This embodiment provides a running frame for a suspended vehicle, which can be applied to the running system of a suspended vehicle, and the running system can travel within a box-type track beam with an opening at the bottom.

[0013] In this embodiment, the vehicle's travel direction is referred to as longitudinal, and the vehicle's width direction is referred to as transverse.

[0014] like Figures 1 to 4 As shown, the running system provided in this embodiment includes: a running frame 11, a traction motor 12, a gearbox 13, running wheels 14, guide wheels 15, and a current collector 16. The carriage is connected to the underside of the running system via a suspension system 2. The traction motor 12 is installed in the middle of the running frame 11 and has two output ends, each of which is connected to the gearbox 13. Running wheels 14 are connected to both sides of each gearbox 13, and the traction motor 12 drives the running wheels 14 to rotate through the gearbox 13. The running system has a total of four running wheels 14, which are rubber wheels that travel within the box-type track beam.

[0015] Guide wheels 15 are installed at the ends of the running frame 11. Guide wheels 15 are provided at both ends of the running frame 11 so that the guide wheels 15 can cooperate with the side wall of the track beam to guide the vehicle during forward or backward movement.

[0016] The current collector 16 is installed below the gearbox 13 and is used to receive power by contacting the power supply rail inside the track beam.

[0017] like Figures 5 to 8 As shown, the traveling frame provided in this embodiment includes: a frame body 111, a motor mounting base 112, a gearbox mounting base 113, and a hanging mounting base 114. The frame body 111 has a hollow box-shaped structure in the middle, and its top two ends extend in opposite directions to form frame ends. The internal space of the box-shaped structure in the middle of the frame body serves as a first accommodating space, and the space below the frame ends serves as a second accommodating space.

[0018] The motor mounting base 112 is located on the upper surface of the bottom wall in the middle of the main frame and is used to install the traction motor 12, which will be placed in the first receiving space.

[0019] A gearbox mounting base 113 is disposed on the lower surface of the end of the frame and is used to mount the gearbox 13. The gearbox 13 is placed in the second receiving space, so that the gearbox 13 and the traction motor 12 are basically at the same height and arranged sequentially along the longitudinal direction. Gearbox mounting bases 113 are provided at both ends of the frame body 111, and gearboxes 13 are mounted thereon. The gearboxes 13 located at both ends of the frame body 111 are respectively connected to the output ends of the traction motor 12, and the traction motor 12 drives the two gearboxes 13 to rotate.

[0020] The suspension mounting base 114 is located on the lower surface of the bottom wall in the middle of the main frame and is used to install the suspension system. The bottom of the suspension system is connected to the carriage, enabling the running system to move on the track and driving the carriage to move synchronously through the suspension system.

[0021] The technical solution provided in this embodiment features a frame body with a hollow box-shaped structure in the middle, which effectively improves the overall rigidity of the frame. The top two ends of the frame body extend in opposite directions to form frame ends. The internal space of the box-shaped structure in the middle of the frame body serves as a first accommodating space, and the space below the frame ends serves as a second accommodating space. A motor mounting base is located on the upper surface of the bottom wall in the middle of the frame body for mounting a traction motor, which is placed in the first accommodating space. A gearbox mounting base is located on the lower surface of the frame ends for mounting a gearbox, which is placed in the second accommodating space. A suspension mounting base is located on the lower surface of the bottom wall in the middle of the frame body for mounting a suspension system. This solution is suitable for mounting a traction motor in the middle of the frame, which can improve the "nodding motion" that occurs in traditional solutions where a heavy traction motor is placed at both ends of the frame, thus improving vehicle driving stability and reliability.

[0022] Furthermore, in traditional designs, components such as air springs, traction pins, and tie rods are all arranged on the frame. However, since the frame needs to travel inside the track beam for extended periods, this is highly inconvenient for routine inspection and maintenance. In this embodiment, only components closely related to travel, such as the traction motor, gearbox, traveling wheels, guide wheels, and current collector, are housed on the traveling frame. Buffer components and traction components are no longer located on the frame; for example, they can be installed on a suspension system located outside the track beam. This solves the problem of the traditional design's difficulty in inspecting and maintaining these components.

[0023] Based on the above scheme, a brake disc 181 is provided on the output shaft of the traction motor 12, and a brake caliper 182 is provided on the housing of the traction motor 12. The brake caliper 182 clamps the disc surface of the brake disc 181 to achieve braking.

[0024] Based on the above technical solution, this embodiment provides an implementation of the frame body 111, specifically comprising: a lower frame cover plate 1111, a first frame side upright plate 1112, a second frame side upright plate 1113, a third frame side upright plate 1116, and a frame upper cover plate 1114 welded together. The lower frame cover plate 1111, the first frame side upright plate 1112, the second frame side upright plate 1113, and the frame upper cover plate 1114 form a first accommodating space.

[0025] The upper surface of the lower cover plate 1111 of the frame is provided with a motor mounting base 112, on which the traction motor 12 is mounted. The traction motor 12 is located in the first accommodating space. The motor mounting base 112 can be installed on the lower cover plate 1111 of the frame by welding or bolt connection. The motor mounting base 112 is provided with connection holes, through which the traction motor 12 can be installed to the motor mounting base 112 by bolts passing through the connection holes.

[0026] The motor mounting bracket 112 is provided with 4 M22 threaded holes for rigid connection of the traction motor and the frame.

[0027] The lower surface of the frame's lower cover plate 1111 is provided with a hanging mounting seat 114. The hanging system 2 is installed onto the hanging mounting seat 114, and the hanging system 2 is located below the frame body 111. The hanging mounting seat 114 can be installed on the frame's lower cover plate 1111 by welding or bolt connection. The hanging mounting seat 114 is provided with connection holes, and the hanging system 2 can be installed onto the hanging mounting seat 114 by bolts passing through the connection holes.

[0028] One implementation is as follows: the hanging mounting base 114 is provided with 14 M20 threaded holes to ensure sufficient safety redundancy, and at the same time, a positioning pin mounting hole with a size of 100×100×30mm is opened in the middle part to facilitate the positioning and installation of the pin seat.

[0029] The lower cover plate 1111 is generally rectangular, with its long side arranged longitudinally. The first frame side uprights 1112 are symmetrically arranged on opposite sides of the lower cover plate 1111, specifically on the long side of the lower cover plate 1111. The first frame side uprights 1112 are arranged vertically and extend longitudinally.

[0030] The second frame side uprights 1113 are symmetrically arranged on the other two sides of the lower cover plate 1111, specifically on the shorter sides of the lower cover plate 1111. The second frame side uprights 1113 are arranged vertically and extend horizontally. The second frame side uprights 1113 are connected to the adjacent first frame side uprights 1112, forming a first accommodating space.

[0031] The top end of the second frame side plate 1113 extends outward in the longitudinal direction to form the frame end base plate 1115. In this embodiment, both ends of the second frame side plate 1113 extend to form the frame end base plate 1115. A gearbox mounting base 113 is disposed on the lower surface of the frame end base plate 1115, and the gearbox 13 is mounted on the gearbox mounting base 113, located below it. The gearbox mounting base 113 can be mounted on the lower surface of the frame end base plate 1115 by welding or bolt connection. The gearbox mounting base 113 has connecting holes, allowing the gearbox 13 to be mounted on the gearbox mounting base 113 by bolts passing through the connecting holes.

[0032] The first frame side plate 1112 and the second frame side plate 1113 are mainly used to bear the vertical load of the frame. The thickness of the first frame side plate 1112 and the second frame side plate 1113 can be 16mm.

[0033] The third frame side plate 1116 is disposed on both sides of the frame end bottom plate 1115 and is connected to the first frame side plate 1112 and the second frame side plate 1113 respectively.

[0034] The top cover plate 1114 of the frame is connected to the top of the first frame side upright plate 1112 and the third frame side upright plate 1113. The end of the top cover plate 1114 is bent downward and extends to connect with the side of the frame end bottom plate 1115 and the third frame side upright plate 1116.

[0035] Specifically, the second frame side plate 1113 includes an upright section and a curved plate section. The upright section is connected to the lower cover plate 1111 of the frame, and the curved plate section is an arc-shaped plate that connects the upright section and the end plate 1115 of the frame.

[0036] The first frame side panel 1112 is a flat plate structure with a rectangular lower part and a protrusion extending longitudinally outward at the top to match the shape of the second frame side panel 1113. The end plate 1115 of the frame is formed by extending outward from the middle position of the curved plate section of the side plate 1113 of the second frame. The lateral length of the end plate 1115 of the frame is less than the lateral dimension of the middle part of the main body 111 of the frame.

[0037] The third frame side plate 1116 also includes an upright section and a curved plate section. The upright section is located on both sides of the bottom plate 1115 at the end of the frame. The curved plate section bends from the upright section and extends laterally outward to connect with the first frame side plate 1112.

[0038] The top cover plate 1114 of the frame is divided into two parts: the middle part and the end part. The middle part is rectangular, and its long side matches the top of the first frame side upright plate 1112, and its short side matches the top of the second frame side upright plate 1113. It can also be regarded as matching the curved plate section of the third frame side upright plate 1116. The end part of the top cover plate 1114 matches the dimensions of the frame end bottom plate 1115, and can also be regarded as matching the vertical section of the third frame side upright plate 1116.

[0039] The end of the upper cover plate 1114 of the frame is bent downward and extends to mate with the bottom plate 1115 of the frame end to enclose the internal space. Furthermore, the surface of the downwardly bent portion of the end of the upper cover plate 1114 of the frame also serves as the end face of the frame end away from the middle of the frame body, for mounting the guide wheel mounting seat 115, on which the guide wheel is mounted.

[0040] Specifically, a guide wheel bracket is installed on the guide wheel mounting base 115. The guide wheel bracket has a "V" shaped structure, and its middle part is connected to the guide wheel mounting base 115 by bolts. The guide wheel 15 is installed at the ends of the two forks of the guide wheel bracket.

[0041] Furthermore, such as Figure 6 As shown, a side bending plate 1117 is also provided on the lower surface of the bending plate section of the second frame side upright plate 1113. The side bending plate 1117 is an arc-shaped plate and is welded and fixed perpendicular to the second frame side upright plate 1113 to improve the strength of the second frame side upright plate 1113.

[0042] Furthermore, a safety wheel mounting base 116 is adopted, which is set on the lower surface of the bottom wall in the middle of the main frame, for mounting the safety wheel 17. In this embodiment, the running wheel 14 is an inflatable rubber wheel. When the running wheel 14 suffers a tire blowout or other failure, the safety wheel 17 can temporarily replace the running wheel and travel at a low speed on the track to ensure that the vehicle can be driven to the nearest station for inspection and maintenance, reducing the impact on the operation of subsequent vehicles and eliminating the need for additional towing vehicles.

[0043] There are two safety wheel mounting seats 116, symmetrically arranged at two ends extending longitudinally along the middle of the main frame. Specifically, the end of the lower cover plate 1111 of the frame is recessed upward to form a recess 1118, and the safety wheel mounting seat 116 is disposed in the recess 1118. The recess 1118 extends laterally, and the safety wheel mounting seat 116 is disposed in the middle of the recess 1118. The spaces on both sides of the safety wheel mounting seat 116 are used to accommodate the safety wheel 17.

[0044] The safety wheel mounting base 116 is integrally forged and has five M16 threaded holes for mounting the safety wheel support.

[0045] Based on the above technical solution, the middle part of the first frame side plate 1112 is hollowed out to form an opening, and the middle part of the second frame side plate 1113 is hollowed out to form an opening, so that the first accommodating space is hollowed out on all sides. On the one hand, it can effectively dissipate heat from the traction motor 12, and on the other hand, it can reduce the overall weight of the frame and achieve lightweight design.

[0046] The aforementioned frame lower cover plate 1111, first frame side upright plate 1112, second frame side upright plate 1113, frame upper cover plate 1114, etc. are all made of steel plates welded together to form a box-shaped structure, which has good overall rigidity, and the material can be Q345E.

[0047] The assembly of the aforementioned traveling frame can be divided into three steps: First, the hanging mounting base 114, the safety wheel mounting base 116, and the motor mounting base 112 are installed on the lower cover plate 1111 of the frame, as follows: Figure 7 As shown, it can improve the local strength and local stiffness of the suspension part.

[0048] Then, install all components except for the upper cover plate 1114 of the frame, such as Figure 8 As shown, after assembly, a box-shaped frame structure with an open top is initially formed.

[0049] Next, the welding of the internal and external welds of the frame is completed. Specifically, a 550×400mm square hole is cut in the middle of the first frame side plate 1112 to minimize the weight of the frame while ensuring the overall structural strength. A hole is cut in the middle of the second frame side plate 1113 to facilitate the connection of the two output ends of the traction motor to the gearbox via a coupling. Four 22mm diameter bolt holes are cut at the bottom of the gearbox mounting base 113 for rigid connection between the gearbox 13 and the frame body. A cross-shaped positioning groove is cut at the bottom of the gearbox mounting base 113 to facilitate the positioning and installation of the gearbox 13. The side bending plate 1117 is used to improve the local rigidity of the frame's bending area.

[0050] Finally, assemble the frame cover plate 1114 and the stabilizer wheel mounting seat 116. After welding, the frame body is formed. The frame cover plate 1114 has a square hole with a size of 800×450mm for the assembly of the traction motor 12 and the arrangement of the wiring harness. The safety wheel mounting seat 116 is used to install the safety wheel support and is provided with a transverse positioning groove and an M20 threaded hole.

[0051] The above technical solution provides a novel suspended monorail train bogie frame suitable for low axle loads and low costs, which can meet the diverse market demands of suspended monorail vehicles. This frame allows for a single traction and braking system in the middle section. Compared to the currently mature suspended monorail train bogie frames, which mostly use an inward or outward motor layout, this frame structure effectively reduces the overall height of the bogie, thereby reducing the height of the track beam and significantly lowering the project cost.

[0052] Furthermore, the running frame used in this embodiment places the heavy traction motor in the middle, with the gearbox and running wheels located at the front and rear ends of the traction motor. This can improve the "nodding" motion caused by the load being concentrated at both ends of the frame in traditional solutions, effectively reducing the yaw inertia and nodding inertia of the frame, making the vehicle travel more smoothly and improving driving safety and comfort.

[0053] In addition, placing components such as air springs and other buffer devices, tie rods, and traction center pins in other locations on the vehicle, rather than on the frame or inside the box-type rails, makes it easier to perform routine inspections and maintenance on these components, effectively reducing the vehicle's operating and maintenance costs, and also improving driving safety and reliability to some extent.

[0054] The aforementioned suspended monorail bogie frame is suitable for 2-ton axle load vehicles, providing more possibilities for urban rail transit with lower capacity, more flexible usage scenarios, and dual needs for tourism and transportation.

[0055] Based on the above technical solutions, this embodiment also provides a running system for a suspended vehicle, including: the running frame as described in any of the above contents.

[0056] This embodiment also provides a suspended vehicle, including: a carriage and the above-mentioned running system, wherein the carriage is suspended below the running system.

[0057] The running system and suspended vehicle provided in this embodiment have the same technical effects as the running frame described above.

[0058] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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 application.

[0059] Furthermore, 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. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0060] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0061] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0062] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A running frame for a suspended vehicle, characterized in that, include: Main structure; The main body of the frame is a hollow box-shaped structure in the middle, and the top two ends of the main body of the frame extend in opposite directions to form the ends of the frame; The internal space of the box-shaped structure in the middle of the main frame serves as the first accommodating space, and the space below the ends of the frame serves as the second accommodating space. The motor mounting bracket is located on the upper surface of the bottom wall in the middle of the main frame and is used to install the traction motor, which will be placed in the first receiving space. A gearbox mounting base, located on the lower surface of the end of the frame, is used to mount the gearbox, which will be placed in the second receiving space; The hanging mounting base is located on the lower surface of the bottom wall in the middle of the main frame and is used to install the hanging system.

2. The traveling frame according to claim 1, characterized in that, The main structure includes: The lower cover plate of the frame; the upper surface of the lower cover plate of the frame is provided with a motor mounting seat; the lower surface of the lower cover plate of the frame is provided with a hanging mounting seat; The first frame side uprights are symmetrically arranged on opposite sides of the lower cover plate of the frame; the first frame side uprights extend longitudinally. The second frame side uprights are symmetrically arranged on the other two sides of the frame lower cover plate; the second frame side uprights extend laterally; and the second frame side uprights are connected to the adjacent first frame side uprights to form a first accommodating space; the top of the second frame side uprights extends to form a frame end bottom plate, and the gearbox mounting seat is arranged on the lower surface of the frame end bottom plate. The third frame side upright plate is set on both sides of the bottom plate at the end of the frame and is connected to the first frame side upright plate and the second frame side upright plate respectively. The top cover plate of the frame is connected to the top of the first frame side plate and the third frame side plate; the end of the top cover plate extends downward to connect with the side of the frame end bottom plate and the third frame side plate.

3. The traveling frame according to claim 2, characterized in that, Also includes: The guide wheel mounting seat is located on the end face of the frame away from the middle of the frame body and is used to install the guide wheel.

4. The traveling frame according to claim 2, characterized in that, Also includes: The safety wheel mounting base is located on the lower surface of the bottom wall in the middle of the main frame. There are two safety wheel mounting seats, which are symmetrically arranged at the two ends of the main frame extending longitudinally in the middle.

5. The traveling frame according to claim 4, characterized in that, The end of the lower cover plate of the frame is recessed upward to form a recessed part; the safety wheel mounting seat is set in the recessed part.

6. The traveling frame according to claim 5, characterized in that, The recess extends laterally, and the safety wheel mounting seat is located in the middle of the recess. The space on both sides of the safety wheel mounting seat is used to accommodate the safety wheel.

7. The traveling frame according to claim 2, characterized in that, The second frame side panel includes a vertical section and a curved section. The vertical section is connected to the lower cover plate of the frame, and the curved section is an arc-shaped plate that connects the vertical section to the bottom plate at the end of the frame.

8. The traveling frame according to claim 2, characterized in that, An opening is formed by hollowing out the middle of the side panel of the first frame; an opening is formed by hollowing out the middle of the side panel of the second frame.

9. A running system for a suspended vehicle, characterized in that, include: The running frame according to any one of claims 1-8.

10. A suspended vehicle, characterized in that, include: The carriage and the running system as described in claim 9, wherein the carriage is suspended below the running system.

Images