Rail engineering truck bogie and rail transit vehicle

Abstract

The utility model provides a rail engineering truck bogie and a rail transit vehicle. The bogie of the rail engineering truck comprises a framework, a wheel pair, an inner axle box, a single traction rod and a suspension system, wherein the framework comprises two side beams which are oppositely arranged and a middle beam which is connected with the two side beams; the inner axle box is positioned between the two side beams; the wheel pair is arranged below the side beams, and the wheel pair is connected with the two side beams through the inner axle box; the single traction rod is connected to the middle beam, and the extending direction of the single traction rod is parallel to the side beams; the suspension system is connected with the side beam and the inner axle box. According to the embodiment of the invention, the single traction rod is designed, so that connecting points and structural parts are simplified, the safety distance between the traction rod and a limit can be reduced, and axle load transfer can also be reduced; meanwhile, an inner axle box suspension mode is adopted, the traction force and the operation stability are improved, and the safe space of the bogie in the lower limit range is sufficient; and a large amount of modular design is adopted, so that the maintenance is convenient.

Description

Technical Field

[0001] The present application relates to the technical field of rail transit. Specifically, the present application relates to a bogie for a rail engineering vehicle and a rail transit vehicle. Background Art

[0002] With the rapid development of modern rail transit in China, more and more rail engineering vehicles have been developed, and their functions have become more and more diversified. At present, there is no unified standard for engineering vehicle bogies, and there are mainly two modes. The first is to modify the traditional freight car bogie, which is connected to the car body through a center plate. The main systems of the bogie are all in the form of freight car bogies, such as a lever type brake shoe braking system, a first-stage Linoel shock absorber, etc.; the second is to modify the subway or passenger car bogie, and its main structure is in the form of a passenger car bogie, such as an air spring, a Z-shaped traction rod, a first-stage swivel arm axle box positioning, etc.

[0003] However, due to the need for rail transit vehicles to avoid building obstacles and road condition restrictions or integrate other components on the bogie, the clearance space for avoidance at the lower limit is very small. The conventional engineering vehicle bogies in the past cannot meet the requirements of engineering vehicles with special properties. As an important part of engineering vehicles, the existing engineering vehicle bogies have the following problems: First, the curve negotiation ability is poor. The curve negotiation radius of the existing engineering vehicle bogies is mostly above 100 meters; second, the safety space at the lower limit of B2 (maximum allowable height) is narrow. The safety space at the lower limit of the conventional engineering vehicle bogie is narrow, which is not conducive to the bogie evolving more possibilities in this space; third, the maintainability is poor. The structure of the conventional engineering vehicle bogie is complex and heavy, and its versatility and modularity are relatively poor.

[0004] In summary, there are technical problems in the existing rail engineering vehicle bogies, such as poor curve negotiation ability, narrow safety space at the lower limit, and poor maintainability. Utility Model Content

[0005] In view of the shortcomings of the existing methods, the present application provides a bogie for a rail engineering vehicle and a rail transit vehicle to solve the technical problems of poor curve negotiation ability, narrow safety space at the lower limit, and poor maintainability existing in the prior art.

[0006] In a first aspect, an embodiment of the present application provides a bogie for a rail engineering vehicle, including a frame, a wheel set, an inner axle box, a single traction rod, and a suspension system:

[0007] The frame includes two side beams arranged oppositely and a middle beam connecting the two side beams;

[0008] The inner axle box is located between the two side beams;

[0009] The wheel set is arranged below the side beams, and the wheel set is respectively connected to the two side beams through the inner axle box;

[0010] A single drawbar, which is connected to the center sill and extends parallel to the side sill;

[0011] A suspension system, connecting the side sill and the inner axle box.

[0012] In some embodiments of the present application, the two side sills are parallel to each other, and the center sill is perpendicular to each side sill.

[0013] In some embodiments of the present application, the side sill and the center sill both include a top plate, a bottom plate and side plates. The top plate is connected to the bottom plate through the side plates on both sides, and the cross-sections of the top plate, the bottom plate and the side plates form a box-shaped structure.

[0014] In some embodiments of the present application, the suspension system includes a primary suspension system and a secondary suspension system. The primary suspension system is located between the wheel set and the bogie frame, and the secondary suspension system is located on the side away from the wheel set of the primary suspension system.

[0015] In some embodiments of the present application, the primary suspension system includes a spring, a vertical shock absorber and a lateral shock absorber. The wheel set is connected to the bogie frame through the spring, and both the vertical shock absorber and the lateral shock absorber are connected to the spring.

[0016] In some embodiments of the present application, it further includes a motor and a gearbox. One end of the gearbox is connected to the output shaft of the motor, and the other end is connected to the drive shaft of the wheel set.

[0017] In some embodiments of the present application, it further includes a plurality of braking units. Each braking unit is connected to the side sill and faces the wheel in the wheel set. The braking units are in one-to-one correspondence with the wheels, and the plurality of braking units are connected through a pneumatic pipeline.

[0018] In some embodiments of the present application, it further includes a sand box device and a sand blasting device. The sand box device is connected to the side sill, and the sand blasting device is connected to the sand box device and faces the wheel set.

[0019] In a second aspect, an embodiment of the present application further provides a rail transit vehicle, including a vehicle body and the rail engineering vehicle bogie as described in any one of the embodiments in the first aspect, and the rail engineering vehicle bogie bears the vehicle body.

[0020] In some embodiments of the present application, the vehicle body is respectively connected to the single drawbar and the secondary suspension system of the rail engineering vehicle bogie.

[0021] The beneficial technical effects brought about by the technical solution provided in the embodiment of the present application include: the embodiment of the present application designs a traction mode of a single traction rod, and the single traction rod is integrated with the vehicle body side stop on the inner center beam of the bogie, thereby simplifying the connection points and structural components, thereby reducing the safety distance between the limit and the axle weight transfer; at the same time, the present embodiment adopts an inner axle box suspension mode, which can reduce the lateral size of the vehicle, improve traction and operating stability, thereby achieving the purpose of having more safety distance from the lower limit of B2, so that the bogie has ample safety space within the lower limit; compared with the traditional engineering vehicle bogie structure, it is more simplified and sophisticated while taking into account the safety level and strength level, and adopts a large number of modular designs, which is easy to maintain.

[0022] Additional aspects and advantages of the present application will be partially given in the following description, which will become apparent from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0024] Figure 1 A front view of a bogie of a railway engineering vehicle in an embodiment of the present application;

[0025] Figure 2 A side view of a bogie of a railway engineering vehicle in an embodiment of the present application;

[0026] Figure 3 It is a top view of a rail engineering vehicle bogie in an embodiment of the present application.

[0027] Reference numerals:

[0028] 1-frame, 2-wheelset, 3-single traction bar, 4-primary suspension system, 5-secondary suspension system, 6-vertical shock absorber, 7-lateral shock absorber, 8-gear box, 9-brake unit;

[0029] 11-side beam, 12-center beam, 41-gearbox suspension, 51-rubber side bearing. DETAILED DESCRIPTION

[0030] The embodiments of the present application are described below in conjunction with the drawings in the present application. It should be understood that the implementation methods described below in conjunction with the drawings are exemplary descriptions for explaining the technical solutions of the embodiments of the present application and do not constitute a limitation on the technical solutions of the embodiments of the present application.

[0031] Those skilled in the art can understand that, unless specifically stated otherwise, the singular forms "a", "an", "above-mentioned" and "the" used herein may also include the plural forms. It should be further understood that the term "comprising" used in the specification of this application means the presence of the described features, integers, steps, operations, elements and / or components, but does not exclude the presence of other features, information, data, steps, operations, elements, components and / or their combinations, etc. supported by the technical field of the present invention. It should be understood that when we say an element is "connected" to another element, the one element can be directly connected to the other element, or it can mean that the one element and the other element establish a connection relationship through an intermediate element. In addition, the "connection" used herein can include wireless connection.

[0032] To make the objectives, technical solutions and advantages of this application clearer, the following will further describe the embodiments of this application in detail with reference to the accompanying drawings. It should be noted that the following embodiments can refer to, draw on or combine with each other. For the same terms, similar features and similar implementation steps in different embodiments, they will not be described repeatedly.

[0033] Aiming at the disadvantages of the existing methods, this application provides a bogie for a rail engineering vehicle and a rail transit vehicle, so as to solve the technical problems of poor curve passing ability, narrow safety space for the lower clearance and poor maintainability existing in the prior art.

[0034] In a first aspect, an embodiment of this application provides a bogie for a rail engineering vehicle, as Figures 1 to 3 shown, Figure 1 is the front view of a bogie for a rail engineering vehicle in an embodiment of this application; Figure 2 is the side view of a bogie for a rail engineering vehicle in an embodiment of this application; Figure 3 is the top view of a bogie for a rail engineering vehicle in an embodiment of this application.

[0035] The bogie for a rail engineering vehicle includes a frame 1, a wheel set 2, inner axle boxes, a single drawbar 3 and a suspension system.

[0036] The frame 1 includes two side beams 11 arranged oppositely and a middle beam 12 connecting the two side beams 11; the inner axle boxes are located between the two side beams 11; the wheel set 2 is arranged below the side beams 11, and the wheel set 2 is respectively connected to the two side beams 11 through the inner axle boxes; the single drawbar 3 is connected to the middle beam 12 and the extending direction is parallel to the side beams 11; the suspension system connects the side beams 11 and the inner axle boxes.

[0037] In the embodiments of the present application, by designing the traction mode of the single traction rod 3, the single traction rod 3 and the car body side damper are integrated on the inner side sill 12 of the bogie together, which simplifies the connection points and structural components. Thus, it can not only reduce the safety distance from the clearance limit, but also reduce the axle load transfer. At the same time, in this embodiment, the inner axle box suspension mode is adopted, which can reduce the lateral dimension of the vehicle, improve the traction force and running stability, so as to achieve the purpose of having more safety distance from the lower clearance limit of B2, making the safety space of the bogie abundant within the lower clearance limit range. Compared with the traditional bogie structure of engineering vehicles, it is more simplified and delicate while taking into account the safety level and strength level, and a large number of modular designs are adopted, which is convenient for maintenance.

[0038] In some embodiments of the present application, the two side sills 11 are parallel to each other, and the center sill 12 is perpendicular to each side sill 11.

[0039] In this embodiment, structurally, the bogie frame 1 is an all-steel welded "H" structure composed of a left side sill, a right side sill and a round tube center sill 12. The side sills 11 and the center sill 12 are box-shaped welded structures. The welding of the frame 1 is automatically carried out by a welding robot.

[0040] In some embodiments of the present application, both the side sill 11 and the center sill 12 include a top plate, a bottom plate and side plates. The top plate is connected to the bottom plate through the side plates on both sides, and the cross-sections of the top plate, the bottom plate and the side plates form a box-shaped structure.

[0041] In this embodiment, the box-shaped welded structure is composed of plates welded together to form a shape similar to a box. This structure is widely used in the bogie frame 1 of railway vehicles, bridges, buildings and many other engineering applications. Steel is usually used as the material because steel has high strength and welding performance. The structural characteristics are that the cross-section of this structure is box-shaped, including a top plate, a bottom plate and side plates on both sides, as well as front and rear end panels. All the plates are connected together by welding to form a solid whole. Closed or open: The box-shaped structure can be completely closed or partially open, depending on the design requirements. The box-shaped structure provides excellent strength and stiffness because the box-shaped cross-section has a high moment of inertia in all directions. This structure can effectively resist bending, torsion and compression loads.

[0042] In some embodiments of the present application, the suspension system includes a primary suspension system 4 and a secondary suspension system 5. The primary suspension system 4 is located between the wheel set 2 and the frame 1, and the secondary suspension system 5 is located on the side of the primary suspension system 4 away from the wheel set 2.

[0043] In some embodiments of the present application, the primary suspension system includes a spring, a vertical shock absorber 6, and a lateral shock absorber 7. The wheel set 2 is connected to the bogie 1 through the spring, and both the vertical shock absorber 6 and the lateral shock absorber 7 are connected to the spring.

[0044] In this embodiment, a primary + secondary suspension method is adopted, making it have good smoothness and stability, and strong vibration absorption and sound insulation capabilities.

[0045] The primary suspension refers to the suspension system located between the wheels and the bogie. It mainly buffers the impact and vibration between the wheels and the track, maintains good contact between the wheels and the track, and provides necessary elastic support. The primary suspension usually includes components such as a gearbox suspension 41, a spring, a shock absorber, and a rubber pad. Its design directly affects the running stability of the vehicle, the riding comfort, and the wear of the track.

[0046] The secondary suspension refers to the suspension system located between the bogie and the car body. Its function is to buffer the dynamic forces between the bogie and the car body, reduce the vibration of the car body, and improve the riding comfort. The secondary suspension usually also consists of a rubber side bearing 51, a spring, a shock absorber, and a rubber pad. Compared with the primary suspension, the secondary suspension usually has higher flexibility and the ability to attenuate vibration.

[0047] The combined action of the primary and secondary suspensions can effectively isolate the unevenness from the track, reduce the vibration transmitted to the car body, thereby improving the comfort of passengers and the running safety of the vehicle. The design and adjustment of these two suspension systems need to comprehensively consider various factors such as the running speed of the vehicle, the load, and the track conditions.

[0048] In some embodiments of the present application, it further includes a motor and a gearbox 8. One end of the gearbox 8 is connected to the output shaft of the motor, and the other end is connected to the drive shaft of the wheel set 2.

[0049] In this embodiment, the gearbox 8 is usually located on the bogie, close to the wheel set 2, in order to transmit power from the motor to the wheel set 2. In a powered bogie, the gearbox 8 is located on the side of the drive wheel set 2.

[0050] The gearbox 8 is a mechanical transmission device containing a set of gears, used to change the rotational speed and torque output by the motor to adapt to the rotational speed and traction force requirements of the wheel set 2. The gearbox 8 may include multiple gear sets, bearings, oil seals, and other transmission elements inside.

[0051] One end of the gearbox 8 is connected to the output shaft of the motor, and the other end is connected to the drive shaft of the wheel set 2.

[0052] In some embodiments of the present application, it further includes a plurality of braking units 9. Each of the braking units 9 is connected to the side beam 11 and faces the wheels in the wheel set 2. The braking units 9 correspond to the wheels one by one, and the plurality of braking units 9 are communicated with each other through pneumatic pipelines.

[0053] The braking unit 9 is a core component of the braking system. It includes a brake disc, a brake drum, a brake cylinder, a brake valve, and a brake pipeline, etc. The braking unit 9 is responsible for receiving braking commands and braking the wheel set 2, thereby realizing the braking of the vehicle.

[0054] The braking unit 9 is connected to the braking system of the vehicle body through a brake pipeline to form a closed braking loop. The braking unit 9 may also be connected to an electronic control system to implement an electronically controlled braking system.

[0055] In some embodiments of the present application, it further includes a sand box device and a sand blasting device. The sand box device is connected to the side beam 11, and the sand blasting device is connected to the sand box device and faces the wheel set 2.

[0056] In this embodiment, the sand box device is a safety device for improving the traction force and braking force when the train travels on the track. It is usually used to apply sand grains on the track to increase the friction coefficient between the wheel and the rail, so as to provide better traction force during starting, braking, or climbing, or to increase the anti-slip effect on a slippery track.

[0057] The sand box device is a container for storing dry sand grains, usually installed on the vehicle body or the frame 1 of the engineering vehicle. The sand blasting system includes pipelines, valves, and nozzles for transporting sand grains from the sand box to the wheel-rail contact surface. The control device allows the operator to control the injection amount of sand grains, usually located in the cab of the engineering vehicle.

[0058] The installation position of the sand box device varies depending on the vehicle type, but it is usually located at the bottom or side of the engineering vehicle, close to the wheel set 2, so that the sand grains can be directly sprayed onto the wheel-rail contact surface. During installation, it is necessary to consider the spraying direction and range of the sand grains to ensure effective coverage of all wheel sets 2 that need to increase friction. When using the sand box device, the operator needs to adjust the injection amount of sand grains according to the track conditions of the train and the required traction or braking force to achieve the best effect. Correct use of the sand box device can significantly improve the safety and efficiency of the track engineering vehicle under specific working conditions.

[0059] In a second aspect, the embodiments of the present application further provide a rail transit vehicle, including a vehicle body and the track engineering vehicle bogie as described in any one of the embodiments in the first aspect, and the track engineering vehicle bogie bears the vehicle body.

[0060] In some embodiments of the present application, the vehicle body is respectively connected to the single traction rod 3 and the secondary suspension system 5 of the bogie of the track construction vehicle.

[0061] In this embodiment, the single traction rod 3 is used to connect the bogie and the vehicle body. On the premise of ensuring that the rail vehicle meets the B2 clearance and has good ride comfort and stability, a large number of modular designs are carried out for the main components of the bogie: the frame 1, the suspension device, the wheel set axle box, the side bearing, the traction device, the braking device, the sand box device, etc., which can be used for the vast majority of track construction vehicles. It solves the problem of the narrow safety space between the traditional bogie and the clearance.

[0062] Compared with the prior art, the application of the embodiments of the present application can achieve at least the following beneficial effects: By designing the traction mode of the single traction rod 3, the single traction rod 3 and the vehicle body side stop are integrated on the inner side sill 12 of the bogie together, which simplifies the connection points and structural components, so that both the safety distance from the clearance can be reduced and the axle load transfer can be reduced; At the same time, this embodiment adopts the inner axle box suspension mode, which can reduce the lateral dimension of the vehicle, improve the traction force and running stability, so as to achieve the purpose of having more safety distance from the lower limit of B2, making the safety space of the bogie abundant within the lower limit range; Compared with the traditional bogie structure of engineering vehicles, it is more simplified and delicate while taking into account the safety level and strength level, and a large number of modular designs are adopted, which is convenient for maintenance.

[0063] In the description of the present application, the directions or positional relationships indicated by the words "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are the exemplary directions or positional relationships based on the drawings, which are for the convenience of describing or simplifying the embodiments of the present application, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0064] The terms "first" and "second" are only used for descriptive purposes, and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0065] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0066] In the description of this specification, specific features, structures, materials, or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0067] The above are only some implementation manners of the present application. It should be noted that for those of ordinary skill in the art, without departing from the technical concept of the solution of the present application, adopting other similar implementation means based on the technical idea of the present application also belongs to the protection scope of the embodiments of the present application.

Claims

1. A rail engineering vehicle bogie, characterized in that: include: A frame, comprising two side beams arranged opposite to each other and a middle beam connecting the two side beams; An inner axle box, located between the two side beams; A wheelset is disposed below the side beam, and the wheelset is connected to the two side beams respectively through the inner axle box; A single traction rod, the single traction rod is connected to the center beam and extends in a direction parallel to the side beam; A suspension system connects the side beam and the inner axle box.

2. The rail engineering vehicle bogie according to claim 1, characterized in that: The two side beams are parallel to each other, and the middle beam and each side beam are perpendicular to each other.

3. The rail engineering vehicle bogie according to claim 1, characterized in that: The side beam and the center beam each include a top plate, a bottom plate and side plates, the top plate is connected to the bottom plate via the side plates on both sides, and the cross sections of the top plate, the bottom plate and the side plates form a box-shaped structure.

4. The rail engineering vehicle bogie according to claim 1, characterized in that: The suspension system includes a primary suspension system and a secondary suspension system. The primary suspension system is located between the wheelset and the frame, and the secondary suspension system is located on a side of the primary suspension system away from the wheelset.

5. The rail engineering vehicle bogie according to claim 4, characterized in that: The primary suspension system comprises a spring, a vertical shock absorber and a lateral shock absorber. The wheelset is connected to the frame via the spring, and the vertical shock absorber and the lateral shock absorber are both connected to the spring.

6. The rail engineering vehicle bogie according to claim 1, characterized in that: It also includes a motor and a gear box, one end of the gear box is connected to the output shaft of the motor, and the other end is connected to the driving shaft of the wheelset.

7. The rail engineering vehicle bogie according to claim 1, characterized in that: It also includes a plurality of brake units, each of which is connected to the side beam and faces the wheel in the wheelset, the brake units correspond to the wheels one by one, and the plurality of brake units are connected through pneumatic pipes.

8. The rail engineering vehicle bogie according to claim 1, characterized in that: It also includes a sand box device and a sand blasting device, wherein the sand box device is connected to the side beam, and the sand blasting device is connected to the sand box device and faces the wheelset.

9. A rail transit vehicle, characterized in that: It comprises a car body and a rail engineering vehicle bogie as claimed in any one of claims 1 to 8, wherein the rail engineering vehicle bogie carries the car body.

10. The rail transit vehicle according to claim 9, characterized in that: The vehicle body is respectively connected with the single traction rod and the secondary suspension system of the rail engineering vehicle bogie.

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