Actively guided bogie and rail transit vehicle

Abstract

The present invention discloses an actively guided bogie, comprising a frame and an axle box body arranged on the frame, and further comprising a first conical rubber spring, a second conical rubber spring, an axle box pull rod and a longitudinal driver. The upper end of the first conical rubber spring is connected to the frame, the lower end of the first conical rubber spring is connected to the first cantilever, the upper end of the second conical rubber spring is connected to the frame, the lower end of the second conical rubber spring is connected to the second cantilever, one end of the longitudinally extending axle box pull rod is hinged to the lower end of the second conical rubber spring, and the other end of the axle box pull rod is hinged to the output end of the longitudinal driver. The longitudinal driver is mounted on the frame, and the longitudinal driver drives the longitudinal displacement of the axle box body via the axle box pull rod. The vehicle's curve negotiating performance is improved, wheelset wear is reduced, longitudinal stiffness and vertical stiffness are separated, a rigid connection between the longitudinal driver and the axle box body is avoided, and operational stability is improved. The present invention also discloses a rail transit vehicle comprising the above-mentioned actively guided bogie.

Description

Technical Field

[0001] The present invention relates to the field of rail transportation, and in particular to an actively guided bogie. In addition, the present invention also relates to a rail transportation vehicle comprising the actively guided bogie. Background Art

[0002] Rail transit vehicles are widely used in various technical fields, particularly in urban rail transit lines constructed underground. Due to various reasons, these lines often have numerous curves with varying curve radii. When a vehicle negotiates a curve, an attack angle forms between the wheels and the rails, causing wear on the wheel flanges and rails, thereby reducing the service life of both wheels and rails. While a relatively soft primary suspension stiffness can reduce the attack angle to a certain extent, it also reduces the operational stability of the wheelset.

[0003] In view of this, it is necessary to use a radial bogie in combination. The active guide bogie reduces the wheel-rail angle by making the front and rear wheelsets of the bogie produce an angle that adapts to the curve, so as to achieve the purpose of reducing wheel-rail wear. However, the existing bogie cannot simultaneously meet the vertical positioning stiffness and longitudinal positioning stiffness of the wheelset, resulting in wheelset instability.

[0004] Therefore, how to provide an actively guided bogie that meets the vertical positioning stiffness and longitudinal positioning stiffness of the wheelset is a technical problem that those skilled in the art currently need to solve. Summary of the Invention

[0005] The present invention aims to provide an actively guided bogie that ensures vertical positioning stiffness through conical rubber springs and longitudinal positioning stiffness through axlebox tie rods, thereby separating longitudinal and vertical stiffness and improving operational stability. Another object of the present invention is to provide a rail transit vehicle incorporating such an actively guided bogie.

[0006] To solve the above technical problems, the present invention provides an actively guided bogie, comprising a frame and an axle box body arranged on the frame, further comprising a first conical rubber spring, a second conical rubber spring, an axle box tie rod, and a longitudinal actuator. A first cantilever and a second cantilever extending longitudinally toward the two ends of the axle box body are provided at both ends of the axle box body, the upper end of the first conical rubber spring is connected to the frame, the lower end of the first conical rubber spring is connected to the first cantilever, the upper end of the second conical rubber spring is connected to the frame, and the lower end of the second conical rubber spring is connected to the second cantilever. A vertically arranged laminated rubber spring structure is provided in the middle of each of the first conical rubber spring and the middle of the second conical rubber spring. One end of the longitudinally extending axle box tie rod is hinged to the lower end of the second conical rubber spring, and the other end of the axle box tie rod is hinged to the output end of the longitudinal actuator. The longitudinal actuator is mounted on the frame. The longitudinal actuator drives the axle box body to longitudinally displace via the axle box tie rod, thereby driving the two wheelsets to generate an angle adapted to the curve.

[0007] Preferably, a vertical first mounting hole is provided at the end of the first cantilever, and the lower end of the first conical rubber spring is mounted in the first mounting hole.

[0008] Preferably, a vertical second mounting hole is provided at the end of the second cantilever, and the lower end of the second conical rubber spring passes through the second mounting hole. The lower end of the second conical rubber spring protrudes below the second cantilever and is hinged to one end of the axle box pull rod.

[0009] Preferably, the laminated rubber spring structure of the first conical rubber spring is located on the first cantilever, and the laminated rubber spring structure of the second conical rubber spring is located on the second cantilever.

[0010] Preferably, the four axle boxes are all connected with the first conical rubber spring, the second conical rubber spring and the axle box pull rod, and the two ends of the axle pass through the two axle boxes at the same end respectively, the two first cantilevers of the two axle boxes on the same side are located at the outer end, the two second cantilevers of the two axle boxes on the same side are located at the inner end, and the two longitudinal drivers of the two axle boxes on the same side are located between the corresponding two axle boxes.

[0011] Preferably, the height of the first cantilever is lower than that of the second cantilever, and the height of the middle portion of the frame side is lower than that of both ends.

[0012] Preferably, the longitudinal drive is a longitudinally arranged electric cylinder.

[0013] Preferably, one end of the axle box pull rod is hinged to the output end of the electric cylinder through a first rubber joint, and the other end of the axle box pull rod is hinged to the lower end of the second conical rubber spring through a second rubber joint.

[0014] Preferably, the rotation axis of the first rubber joint extends horizontally, and the rotation axis of the second rubber joint extends vertically.

[0015] The present invention also provides a rail transit vehicle, comprising the actively guided bogie as described in any one of the above.

[0016] The present invention provides an actively guided bogie, comprising a frame and an axle box body arranged on the frame, and also comprising a first conical rubber spring, a second conical rubber spring, an axle box pull rod and a longitudinal driver. A first cantilever and a second cantilever extending longitudinally toward the two ends are provided at both ends of the axle box body respectively. The upper end of the first conical rubber spring is connected to the frame, the lower end of the first conical rubber spring is connected to the first cantilever, the upper end of the second conical rubber spring is connected to the frame, and the lower end of the second conical rubber spring is connected to the second cantilever. A vertically arranged laminated rubber spring structure is provided in the middle of the first conical rubber spring and the middle of the second conical rubber spring. One end of the longitudinally extending axle box pull rod is hinged to the lower end of the second conical rubber spring, and the other end of the axle box pull rod is hinged to the output end of the longitudinal driver. The longitudinal driver is installed on the frame. The longitudinal driver drives the axle box body to longitudinally displace through the axle box pull rod to drive the two wheelsets to generate an angle that adapts to the curve.

[0017] When turning, the longitudinal driver drives the longitudinal displacement of the axle box through the axle box tie rod, adjusts the distance between the two axle boxes on the same side, and makes the wheelsets at both ends actively form an angle, thereby improving the vehicle's curve passing performance and reducing wheelset wear. At the same time, the vertical positioning stiffness is guaranteed by the conical rubber spring, and the longitudinal positioning stiffness is guaranteed by the axle box tie rod, realizing the separation of longitudinal stiffness and vertical stiffness, avoiding the rigid connection between the longitudinal driver and the axle box, and improving the operation stability.

[0018] Furthermore, the longitudinal drive adopts an electric cylinder, which has a simple and reliable structure, no risk of oil leakage, reduces control delay and control difficulty, and improves control accuracy.

[0019] The present invention also provides a rail transit vehicle including the above-mentioned active guided bogie. Since the above-mentioned active guided bogie has the above-mentioned technical effects, the above-mentioned rail transit vehicle should also have the same technical effects, which will not be introduced in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic front view of a specific embodiment of the active steering bogie provided by the present invention;

[0021] Figure 2A schematic top view of a specific embodiment of the actively guided bogie provided by the present invention;

[0022] Figure 3 A schematic front view of a suspension device in a specific embodiment of the actively guided bogie provided by the present invention;

[0023] Figure 4 A schematic diagram of steering of a specific embodiment of the actively guided bogie provided by the present invention.

[0024] Among them, the frame 1, the axle box body 2, the first conical rubber spring 3, the second conical rubber spring 4, the axle box pull rod 5, the first cantilever 6, the second cantilever 7, the laminated rubber spring structure 8, the axle 9, the electric cylinder 10, the first rubber joint 11, the second rubber joint 12, and the wheel 13. DETAILED DESCRIPTION

[0025] The core of this invention is to provide an actively guided bogie that ensures vertical positioning stiffness through tapered rubber springs and longitudinal positioning stiffness through axlebox tie rods, achieving separation of longitudinal and vertical stiffness and improving operational stability. Another core of this invention is to provide a rail transit vehicle incorporating this actively guided bogie.

[0026] In order to enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0027] Please refer to Figures 1 to 4 , Figure 1 A schematic front view of a specific embodiment of the active steering bogie provided by the present invention; Figure 2 A schematic top view of a specific embodiment of the actively guided bogie provided by the present invention; Figure 3 A schematic front view of a suspension device in a specific embodiment of the actively guided bogie provided by the present invention; Figure 4 A schematic diagram of steering of a specific embodiment of the actively guided bogie provided by the present invention.

[0028] A specific embodiment of the present invention provides an actively guided bogie, comprising a frame 1 and an axle box 2 arranged on the frame 1. The forward direction of the frame 1 is longitudinal, and the extension direction of the axle 9 is transverse. The axles 9 connected to the same wheel 13 are respectively located at the longitudinal ends of the frame 1. At the same time, the frame 1 includes an arm structure arranged opposite to each other, and the two arm structures are respectively located on the transverse sides of the frame 1. The axle box 2 is connected to the arm structure through a conical rubber spring to form a suspension device. The suspension device also includes a first conical rubber spring 3, a second conical rubber spring 4, an axle box pull rod 5 and a longitudinal driver. A first cantilever 6 and a second cantilever 7 are provided at both ends of the axle box 2. The first cantilever 6 and the second cantilever 7 are extended in opposite directions at both ends of the axle box 2, that is, the first cantilever 6 and the second cantilever 7 extend longitudinally to both ends respectively. The axle box 2 and the first cantilever 6 and the second cantilever 7 can be arranged as an integral whole or as a separate part.

[0029] Among them, the upper end of the first conical rubber spring 3 is connected to the frame 1, the lower end of the first conical rubber spring 3 is connected to the first cantilever 6, the upper end of the second conical rubber spring 4 is connected to the frame 1, and the lower end of the second conical rubber spring 4 is connected to the second cantilever 7. The two conical rubber springs provide a vibration reduction effect and provide vertical positioning stiffness for the wheelset. Furthermore, one end of the longitudinally extending axle box rod 5 is hinged to the lower end of the second conical rubber spring 4, and the other end of the axle box rod 5 is hinged to the output end of the longitudinal driver. The longitudinal driver is installed on the frame 1. The longitudinal driver drives the axle box body 2 to longitudinally displace through the axle box rod 5 to drive the two wheelsets to produce an angle that adapts to the track curve, thereby forming an "eight-shaped" wheelset and providing longitudinal positioning stiffness for the wheelset.

[0030] When turning, the longitudinal driver drives the longitudinal displacement of the axle box body 2 through the axle box tie rod 5, adjusts the distance between the two axle box bodies 2 on the same side, and makes the wheelsets at both ends actively form an angle, thereby improving the curve passing performance of the vehicle and reducing the wear of the wheelsets. At the same time, the vertical positioning stiffness is guaranteed by the conical rubber spring, and the longitudinal positioning stiffness is guaranteed by the axle box tie rod 5, realizing the separation of longitudinal stiffness and vertical stiffness, avoiding the rigid connection between the longitudinal driver and the axle box body 2, and improving the operation stability.

[0031] Furthermore, a vertically arranged laminated rubber spring structure 8 is provided in the middle of the first conical rubber spring 3 and the middle of the second conical rubber spring 4. The laminated rubber spring structure 8 improves the longitudinal deformation capacity of the first conical rubber spring 3 and the second conical rubber spring 4, making it easier for the axle box pull rod 5 to push and pull the axle box body 2 to move, reducing the obstruction of the first conical rubber spring 3 and the second conical rubber spring 4 to the displacement of the axle box body 2, and facilitating the angle change of the wheelset when the longitudinal drive is working to adapt to the curve radius of the track.

[0032] To facilitate a stable connection between the cantilever and the conical rubber spring, a vertical first mounting hole is provided at the end of the first cantilever 6, into which the lower end of the first conical rubber spring 3 is mounted. Simultaneously, a vertical second mounting hole is provided at the end of the second cantilever 7, through which the lower end of the second conical rubber spring 4 passes, protruding below the second cantilever 7. One end of the axle box tie rod 5 is then hingedly connected to the lower end of the second conical rubber spring 4, i.e., the axle box tie rod 5 is directly connected to the lower end of the second conical rubber spring 4, which in turn is connected to the second cantilever 7, ultimately achieving a stable connection between the three.

[0033] Specifically, the laminated rubber spring structure 8 of the first conical rubber spring 3 is located on the first cantilever 6 , and the laminated rubber spring structure 8 of the second conical rubber spring 4 is located on the second cantilever 7 .

[0034] In the actively guided bogie provided by the specific embodiment of the present invention, each of the four axleboxes 2 is connected to a first conical rubber spring 3, a second conical rubber spring 4, and an axlebox tie rod 5. The ends of the axle 9 pass through the two axleboxes 2 on the same side, respectively. The two first cantilevers 6 of the two axleboxes 2 on the same side are located at the outer ends, and the two second cantilevers 7 of the two axleboxes 2 on the same side are located at the inner ends. The two longitudinal actuators of the two axleboxes 2 on the same side are located between the corresponding two axleboxes 2. In other words, the two axleboxes 2 on the same side and related components are arranged symmetrically, with the two longitudinal actuators positioned close to each other and positioned on the innermost sides, and the two first conical rubber springs 3 positioned away from each other and positioned on the outermost sides.

[0035] Furthermore, the height of the first cantilever 6 is lower than that of the second cantilever 7, and the height of the middle portion of the arm structure on the side of the frame 1 is lower than that of the ends, which facilitates the installation of the longitudinal drive. The structure and arrangement of each component can also be adjusted according to the situation, all within the scope of protection of the present invention.

[0036] On the basis of the actively guided bogies provided in the above-mentioned specific embodiments, the longitudinal driver is specifically a longitudinally arranged electric cylinder 10, which has a simple and reliable structure, no risk of oil leakage, reduces control delay and control difficulty, and improves control accuracy.

[0037] Preferably, one end of the axle box tie rod 5 is articulated to the output end of the electric cylinder 10 via a first rubber joint 11, and the other end of the axle box tie rod 5 is articulated to the lower end of the second conical rubber spring 4 via a second rubber joint 12. The rotation axis of the first rubber joint 11 extends horizontally, while the rotation axis of the second rubber joint 12 extends vertically. This bidirectional joint structure ensures that the axle box tie rod 5 does not become stuck during operation. Furthermore, the rubber joint provides a certain degree of cushioning and vibration reduction, improving wheel stability and safety.

[0038] When turning, the two electric cylinders 10 on the outer rail side push the axle box rods 5 outward, and the two axle box rods 5 simultaneously push the axle box body 2 outward, that is, push the wheelset to deflect outward; at the same time, the two electric cylinders 10 on the inner rail side pull the axle box rods 5 inward, and the two axle box rods 5 simultaneously pull the axle box body 2 inward, that is, pull the wheelset to deflect inward; thereby realizing the deflection of the wheelset to adapt to the track curve.

[0039] In addition to the above-mentioned active steering bogie, a specific embodiment of the present invention further provides a rail transit vehicle including the above-mentioned active steering bogie. For the structures of other parts of the rail transit vehicle, please refer to the prior art and will not be described in detail herein.

[0040] The above is a detailed introduction to the active guided bogie and rail transit vehicle provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified in several ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. An actively guided bogie, comprising a frame (1) and an axle box (2) arranged on the frame (1), characterized in that: The axle box body (2) further comprises a first conical rubber spring (3), a second conical rubber spring (4), an axle box pull rod (5) and a longitudinal driver. The axle box body (2) is provided with a first cantilever (6) and a second cantilever (7) extending longitudinally toward the two ends respectively at both ends. The upper end of the first conical rubber spring (3) is connected to the frame (1), and the lower end of the first conical rubber spring (3) is connected to the first cantilever (6). The upper end of the second conical rubber spring (4) is connected to the frame (1), and the lower end of the second conical rubber spring (4) is connected to the second cantilever ( 7), a vertically arranged laminated rubber spring structure (8) is provided in the middle of the first conical rubber spring (3) and the middle of the second conical rubber spring (4), one end of the longitudinally extending axle box pull rod (5) is hinged to the lower end of the second conical rubber spring (4), and the other end of the axle box pull rod (5) is hinged to the output end of the longitudinal driver, and the longitudinal driver is installed on the frame (1), and the longitudinal driver drives the axle box body (2) to longitudinally displace through the axle box pull rod (5) to drive the two wheel sets to generate an angle that adapts to the curve.

2. The actively guided bogie according to claim 1, characterized in that: A vertical first mounting hole is provided at the end of the first cantilever (6), and the lower end of the first conical rubber spring (3) is mounted in the first mounting hole.

3. The actively guided bogie according to claim 2, characterized in that: A vertical second mounting hole is provided at the end of the second cantilever (7), and the lower end of the second conical rubber spring (4) passes through the second mounting hole. The lower end of the second conical rubber spring (4) protrudes below the second cantilever (7) and is hinged to one end of the axle box pull rod (5).

4. The actively guided bogie according to claim 1, characterized in that: The laminated rubber spring structure (8) of the first conical rubber spring (3) is located above the first cantilever (6), and the laminated rubber spring structure (8) of the second conical rubber spring (4) is located above the second cantilever (7).

5. The actively guided bogie according to claim 1, characterized in that: The four axle boxes (2) are all connected with the first conical rubber spring (3), the second conical rubber spring (4) and the axle box pull rod (5); the two ends of the axle (9) respectively pass through the two axle boxes (2) at the same end; the two first cantilevers (6) of the two axle boxes (2) on the same side are located at the outer end; the two second cantilevers (7) of the two axle boxes (2) on the same side are located at the inner end; and the two longitudinal drivers of the two axle boxes (2) on the same side are located between the corresponding two axle boxes (2).

6. The actively guided bogie according to claim 5, characterized in that: The height of the first cantilever (6) is lower than the height of the second cantilever (7), and the height of the middle portion of the side of the frame (1) is lower than that of the two ends.

7. The actively guided bogie according to any one of claims 1 to 6, characterized in that: The longitudinal drive is specifically a longitudinally arranged electric cylinder (10).

8. The actively guided bogie according to claim 7, characterized in that: One end of the axle box pull rod (5) is hinged to the output end of the electric cylinder (10) through a first rubber joint (11), and the other end of the axle box pull rod (5) is hinged to the lower end of the second conical rubber spring (4) through a second rubber joint (12).

9. The actively guided bogie according to claim 8, characterized in that: The rotation axis of the first rubber joint (11) extends horizontally, and the rotation axis of the second rubber joint (12) extends vertically.

10. A rail transit vehicle, characterized in that: Comprising an actively guided bogie as claimed in any one of claims 1 to 9.

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