Bogie system and railway vehicle

Abstract

The invention relates to the technical field of railway vehicles, and provides a bogie system and a railway vehicle. The bogie system comprises a framework, a steering assembly and an auxiliary supporting assembly. The framework comprises two cross beams, two inner bent beams and two outer bent beams. The steering assembly comprises a first driving motor, a second driving motor, a first wheel and a second wheel, the first wheel is in transmission connection with an output shaft of the first driving motor, the second wheel is in transmission connection with an output shaft of the second driving motor, and the first wheel and the second wheel are located in the corresponding containing spaces respectively. The auxiliary supporting assembly comprises two auxiliary supporting units, each auxiliary supporting unit comprises an inner connecting base and an outer connecting base, the top of each inner connecting base is connected with the corresponding inner bent beam, and the top of each outer connecting base is connected with the corresponding outer bent beam. Independent rotation of the left wheel and the right wheel can be achieved, the defects that a traditional rail vehicle is prone to generating snakelike motion during high-speed running and the effect is poor when the traditional rail vehicle passes through a small-radius curve are overcome, and the stability during running is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of rail vehicles, and in particular to a bogie system and a rail vehicle. Background Art

[0002] At present, high-speed railways have become an important part of transportation. Due to the rigid connection between the wheels and axles, traditional rail vehicles are prone to serpentine motion when traveling at high speeds. This motion is usually caused by the dynamic instability of the vehicle, which is mainly manifested as periodic lateral swings of the vehicle when traveling in a straight line, affecting driving stability and passenger comfort. In addition, in small radius curves, traditional rail vehicles will be affected by large lateral forces, which will cause uneven contact between the wheels and the track, increase wear, and may affect passenger comfort. The traditional axle connection method also limits the vehicle's ability to pass through curves and increases the difficulty of track maintenance. Summary of the invention

[0003] The present invention provides a bogie system and a rail vehicle, which can realize independent rotation of left and right wheels, eliminate the defects of traditional rail vehicles that are prone to serpentine motion when traveling at high speed and have poor performance when passing through small radius curves, and improve stability during operation.

[0004] One aspect of the present invention provides a bogie system, comprising: a frame, a steering assembly and an auxiliary support assembly.

[0005] The frame includes two cross beams, two inner curved beams and two outer curved beams. The two cross beams are spaced apart along a first direction, and the two inner curved beams are spaced apart along a second direction. The cross beam is arranged between the two inner curved beams, and the two ends of the cross beam are respectively connected to the inner curved beams located on the corresponding sides. The outer curved beams are located on the outer sides of the corresponding inner curved beams, and the two ends of the inner curved beams are respectively connected to the two ends of the outer curved beams on the same side. An accommodating space is provided between the middle of the inner curved beam and the middle of the outer curved beam.

[0006] The steering assembly includes a first drive motor, a second drive motor, a first wheel and a second wheel. The first drive motor and the second drive motor are both connected to the crossbeam. The first wheel is drivingly connected to the output shaft of the first drive motor. The second wheel is drivingly connected to the output shaft of the second drive motor. The first wheel and the second wheel are respectively located in the corresponding accommodating spaces.

[0007] The auxiliary support assembly includes two auxiliary support units, and the auxiliary support unit includes an inner connecting seat and an outer connecting seat. The two ends of the first wheel are rotatably connected to the corresponding inner connecting seat and the corresponding outer connecting seat respectively, and the two ends of the second wheel are rotatably connected to the corresponding inner connecting seat and the corresponding outer connecting seat respectively, the top of the inner connecting seat is connected to the inner curved beam, and the top of the outer connecting seat is connected to the outer curved beam.

[0008] According to the bogie system provided by the present invention, a first vertical shock absorbing unit is provided between the inner connecting seat and the inner curved beam, and a second vertical shock absorbing unit is provided between the outer connecting seat and the outer curved beam, and the first vertical shock absorbing unit and the second vertical shock absorbing unit are both located on the vertical plane where the center lines of the first wheel and the second wheel are located.

[0009] According to the bogie system provided by the present invention, a third vertical shock absorbing unit is further provided between the inner connecting seat and the inner curved beam, the lower end of the third vertical shock absorbing unit is hinged to the side of the inner connecting seat, the upper end of the third vertical shock absorbing unit is hinged to the bottom of the inner curved beam, and the side of the inner connecting seat facing away from the third vertical shock absorbing unit is hinged to the inner curved beam.

[0010] According to the bogie system provided by the present invention, a fourth vertical shock absorbing unit is further provided between the outer connecting seat and the outer curved beam, the lower end of the fourth vertical shock absorbing unit is hinged to the side of the outer connecting seat, the upper end of the fourth vertical shock absorbing unit is hinged to the bottom of the outer curved beam, and the side of the outer connecting seat facing away from the fourth vertical shock absorbing unit is hinged to the outer curved beam.

[0011] According to the bogie system provided by the present invention, the inner curved beam comprises a first main body portion, both ends of the first main body portion are provided with first curved portions curved downward, and the end of the first curved portion is provided with a second curved portion curved toward the corresponding outer curved beam.

[0012] The outer curved beam comprises a second main body portion, and both ends of the second main body portion are provided with a third curved portion curved downward, and the end of the third curved portion is connected to the end of the second curved portion.

[0013] According to the bogie system provided by the present invention, a support seat is provided between the end of the third curved portion and the end of the second curved portion, a fifth vertical shock absorbing unit is provided on the top of the support seat, and the top of the fifth vertical shock absorbing unit is used to be connected to the car body; and / or, a sixth vertical shock absorbing unit is provided on the third curved portion; and / or, a fixed seat is provided on the side wall of the support seat, and a seventh vertical shock absorbing unit is provided on the fixed seat.

[0014] The bogie system provided according to the present invention further includes a traction device, a first lateral shock absorbing unit is provided between the traction device and the cross beam along the first direction, and a second lateral shock absorbing unit is provided between the traction device and the inner curved beam along the second direction.

[0015] One end of the first lateral shock absorbing unit is hinged to the traction device, and the other end of the first lateral shock absorbing unit is hinged to the cross beam. One end of the second lateral shock absorbing unit is hinged to the traction device, and the other end of the second lateral shock absorbing unit is hinged to the inner bending beam.

[0016] According to the bogie system provided by the present invention, an anti-torsion axle bridge is provided between the bottoms of the two inner connecting seats; and / or a transverse reinforcement rod is provided between the inner curved beam and the outer curved beam; and / or a longitudinal reinforcement rod is provided between the two cross beams.

[0017] According to the bogie system provided by the present invention, a sensor box is provided on the outer end surface of the outer connecting seat, and a sensor module is provided in the sensor box.

[0018] Another aspect of the present invention provides a rail vehicle, comprising a vehicle body and the bogie system as described above, wherein the bogie system is connected to the vehicle body.

[0019] The bogie system and rail vehicle provided by the present invention, by setting a steering assembly and an auxiliary support assembly, can drive the first wheel and the second wheel located on the left and right sides to rotate independently by the first drive motor and the second drive motor when the rail vehicle needs to turn, and realize the turning by using the differential rotation between the first wheel and the second wheel, which can eliminate the defects of traditional rail vehicles that are prone to serpentine motion when traveling at high speed and have poor effect when passing through small radius curves, and improve the stability during operation. By setting the frame to a structural form of two crossbeams, two inner curved beams and two outer curved beams, and cooperating with the inner connecting seat and the outer connecting seat located on both sides of the wheel, the wheel can form a triangular support, which greatly improves the stability of the wheel during operation.

[0020] In addition, by setting the frame as a frame structure, under the premise of cooperating with the inner and outer connecting seats on both sides of the wheel to stably support the wheel, the overall mass of the bogie system can be greatly reduced, which is conducive to increasing the vehicle speed.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is one of the schematic diagrams of the bogie system provided in the embodiment of the present invention.

[0024] Figure 2 This is the second schematic diagram of the bogie system provided in the embodiment of the present invention.

[0025] Figure 3 It is a front view of the bogie system provided by an embodiment of the present invention.

[0026] Figure 4 is a top view of a bogie system provided by an embodiment of the present invention.

[0027] Figure 5 It is a side view of a bogie system provided by an embodiment of the present invention.

[0028] Figure 6 yes Figure 4 AA section view.

[0029] Figure 7 It is a schematic diagram of the connection between the wheel and the inner connecting seat and the outer connecting seat in the bogie system provided by an embodiment of the present invention.

[0030] Figure 8 It is a schematic diagram of a frame in a bogie system provided in an embodiment of the present invention.

[0031] Fig. 9 It is one of the passability index diagrams of the bogie system provided in the embodiment of the present invention.

[0032] Fig.10 This is the second passability index diagram of the bogie system provided in an embodiment of the present invention.

[0033] Reference numerals:

[0034] 1. Frame; 110. Crossbeam; 120. Inner curved beam; 121. First main body; 122. First curved part; 123. Second curved part; 130. Outer curved beam; 131. Second main body; 132. Third curved part; 140. Transverse reinforcing rod; 150. Longitudinal reinforcing rod; 2. First drive motor; 3. Second drive motor; 4. First wheel; 5. Second wheel; 6. Inner connecting seat; 7. Outer connecting seat; 8. Sensor Box; 9. Bearing; 10. Hook; 11. First vertical shock absorbing unit; 12. Second vertical shock absorbing unit; 13. Third vertical shock absorbing unit; 14. Fourth vertical shock absorbing unit; 15. Support seat; 16. Fifth vertical shock absorbing unit; 17. Sixth vertical shock absorbing unit; 18. Seventh vertical shock absorbing unit; 19. Traction device; 20. First lateral shock absorbing unit; 21. Second lateral shock absorbing unit; 22. Articulated seat; 23. Anti-torsion axle bridge. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0037] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0038] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0039] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0040] Combine the following Figures 1 to 10 The bogie system and rail vehicle provided by the present invention are described.

[0041] It should be noted that the “first direction” mentioned below specifically refers to Figure 3 The longitudinal direction shown in the figure is the front-rear direction of the vehicle. The "second direction" mentioned below specifically refers to Figure 3 The lateral direction shown in , that is, the left and right direction of the vehicle.

[0042] See also Figures 1 to 6 As shown, the bogie provided by the embodiment of the present invention includes: a frame 1, a steering assembly and an auxiliary support assembly.

[0043] The frame 1 includes two cross beams 110, two inner curved beams 120 and two outer curved beams 130. The two cross beams 110 are arranged at intervals along the first direction, and the two inner curved beams 120 are arranged at intervals along the second direction. The cross beam 110 is arranged between the two inner curved beams 120, and the two ends of the cross beam 110 are respectively connected to the inner curved beams 120 located on the corresponding side. The outer curved beam 130 is located on the outer side of the corresponding inner curved beam 120, and the two ends of the inner curved beam 120 are respectively connected to the two ends of the outer curved beam 130 on the same side, and an accommodating space is provided between the middle of the inner curved beam 120 and the middle of the outer curved beam 130.

[0044] The steering assembly includes a first drive motor 2, a second drive motor 3, a first wheel 4 and a second wheel 5. The first drive motor 2 and the second drive motor 3 are both connected to the crossbeam 110. The first wheel 4 is connected to the output shaft of the first drive motor 2 through a transmission connection. The second wheel 5 is connected to the output shaft of the second drive motor 3 through a transmission connection. The first wheel 4 and the second wheel 5 are respectively located in corresponding accommodating spaces.

[0045] The auxiliary support assembly includes two auxiliary support units, and the auxiliary support units include an inner connecting seat 6 and an outer connecting seat 7. The two ends of the first wheel 4 are rotatably connected to the corresponding inner connecting seat 6 and the corresponding outer connecting seat 7 respectively, and the two ends of the second wheel 5 are rotatably connected to the corresponding inner connecting seat 6 and the corresponding outer connecting seat 7 respectively. The top of the inner connecting seat 6 is connected to the inner curved beam 120, and the top of the outer connecting seat 7 is connected to the outer curved beam 130.

[0046] The bogie system provided by the present invention, by providing a steering assembly and an auxiliary support assembly, can drive the first wheel 4 and the second wheel 5 located on the left and right sides to rotate independently through the first drive motor 2 and the second drive motor 3 when the rail vehicle needs to turn, and realize the turning by utilizing the differential rotation between the first wheel 4 and the second wheel 5, which can eliminate the defects of traditional rail vehicles that are prone to serpentine motion when traveling at high speeds and have poor performance when passing through small radius curves, thereby improving the stability during operation. By setting the frame 1 as a structural form of two crossbeams 110, two inner curved beams 120 and two outer curved beams 130, and cooperating with the inner connecting seat 6 and the outer connecting seat 7 located on both sides of the wheel, the wheel can form a triangular support (see Figure 3 ), which greatly improves the stability of the wheel during operation.

[0047] In addition, by setting the frame 1 as a frame structure, under the premise of cooperating with the inner connecting seat 6 and the outer connecting seat 7 on both sides of the wheel to stably support the wheel, the overall mass of the bogie system can be greatly reduced, which is conducive to increasing the vehicle speed.

[0048] Specifically, see Figure 4 As shown, in this embodiment, two inner curved beams 120 and two outer curved beams 130 are symmetrically distributed on both sides of the two cross beams 110. The first wheel 4 and the second wheel 5, the first drive motor 2 and the second drive motor 3 are symmetrically distributed along the left and right directions. The output shaft of the first drive motor 2 is connected to the first wheel 4 through a coupling, and the output shaft of the second drive motor 3 is connected to the second wheel 5 through a coupling, so that the torque is transmitted from the motor to the wheel, so that the first wheel 4 and the second wheel 5 can rotate independently. In addition, the first wheel 4 and the second wheel 5 are directly driven by the first drive motor 2 and the second drive motor 3 respectively, and the gear box transmission is abandoned, which minimizes the output loss of the motor and can greatly reduce the total weight of the bogie system, which is conducive to further improving the vehicle speed.

[0049] The first drive motor 2 and the second drive motor 3 are both lightweight DC motors. Lightweight DC motors are light in weight, easy to be integrated and installed in the bogie system, and meet the lightweight design requirements of the bogie system.

[0050] The first wheel 4 and the second wheel 5 are both equipped with independent brake calipers, and the lifting ears of the brake calipers are connected to the bottom surfaces of the corresponding inner curved beams 120 .

[0051] See also Figure 6 As shown, bearings 9 are provided inside the inner connecting seat 6 and the outer connecting seat 7, and the outer ring of the bearing 9 is embedded in the outer connecting seat 7 and the outer connecting seat 7. The inner ring of the bearing 9 is sleeved on the stepped shaft at both ends of the first wheel 4 and the second wheel 5, and is configured to be rotatably connected with the outer connecting seat 7 and the outer connecting seat 7 through the bearing 9.

[0052] See also Figure 6 As shown, the lower ends of the two beams 110 are provided with a plurality of hook groups (specifically 3) at intervals along the second direction, each hook group includes two hooks 10 arranged at intervals, and a suspension rod is provided between the two hooks 10, and the front and rear ends of the motor housing are respectively provided with suspension rings, and the two suspension rings are respectively mounted on the corresponding suspension rods, so as to achieve stable lifting and fixation of the first drive motor 2 and the second drive motor 3.

[0053] See also Figure 6 and Figure 7 As shown, according to some embodiments of the present invention, a first vertical shock absorbing unit 11 is provided between the inner connecting seat 6 and the inner curved beam 120, and a second vertical shock absorbing unit 12 is provided between the outer connecting seat 7 and the outer curved beam 130. The first vertical shock absorbing unit 11 and the second vertical shock absorbing unit 12 are both located on the vertical plane where the center lines of the first wheel 4 and the second wheel 5 are located. By providing the first vertical shock absorbing unit 11 and the second vertical shock absorbing unit 12, the vertical vibration effect on the wheels during operation can be absorbed by the first vertical shock absorbing unit 11 and the second vertical shock absorbing unit 12, and since the first vertical shock absorbing unit 11 and the second vertical shock absorbing unit 12 are both located on the vertical plane where the center lines of the first wheel 4 and the second wheel 5 are located, the vertical vibration of the wheels can be more evenly and comprehensively absorbed when they contact the two shock absorbing units.

[0054] Specifically, in this embodiment, the first vertical damping unit 11 and the second vertical damping unit 12 both use damping springs. The tops of the inner connecting seat 6 and the outer connecting seat 7 are both provided with spring seats, the lower end surfaces of the inner curved beam 120 and the outer curved beam 130 are both provided with spring grooves, the lower ends of the damping springs are connected to the spring seats, and the upper ends of the damping springs are located in the spring grooves.

[0055] See also Figure 2As shown, according to some embodiments of the present invention, a third vertical shock absorbing unit 13 is further provided between the inner connecting seat 6 and the inner curved beam 120, the lower end of the third vertical shock absorbing unit 13 is hinged to the side of the inner connecting seat 6, the upper end of the third vertical shock absorbing unit 13 is hinged to the bottom of the inner curved beam 120, and the side of the inner connecting seat 6 away from the third vertical shock absorbing unit 13 is hinged to the inner curved beam 120. By providing the third vertical shock absorbing unit 13, and configuring the side of the inner connecting seat 6 away from the third vertical shock absorbing unit 13 to be hinged to the inner curved beam 120, the shock absorbing capacity can be enhanced, and the hinge point between the inner connecting seat 6 and the inner curved beam 120 allows the two to perform a certain relative movement when subjected to force, so as to help reduce the stress directly transmitted to the wheel and the frame 1 due to vibration, and cooperate with the third vertical shock absorbing unit 13 provided on the opposite side to further support and buffer vibration.

[0056] See also Figure 1 , Figure 2 and Figure 5 As shown, according to some embodiments of the present invention, a fourth vertical shock absorbing unit 14 is further provided between the outer connecting seat 7 and the outer curved beam 130, the lower end of the fourth vertical shock absorbing unit 14 is hinged to the side of the outer connecting seat 7, the upper end of the fourth vertical shock absorbing unit 14 is hinged to the bottom of the outer curved beam 130, and the side of the outer connecting seat 7 away from the fourth vertical shock absorbing unit 14 is hinged to the outer curved beam 130. By providing the fourth vertical shock absorbing unit 14, and configuring the side of the outer connecting seat 7 away from the fourth vertical shock absorbing unit 14 to be hinged to the outer curved beam 130, the shock absorbing capacity can be enhanced, and the hinge point between the outer connecting seat 7 and the outer curved beam 130 allows the two to perform a certain relative movement when subjected to force, so as to help reduce the stress directly transmitted to the wheel and the frame 1 due to vibration, and cooperate with the fourth vertical shock absorbing unit 14 provided on the opposite side to further support and buffer vibration.

[0057] In addition, in this embodiment, the third vertical shock absorbing unit 13 and the fourth vertical shock absorbing unit 14 are located on the same side, and the hinge point between the inner connecting seat 6 and the inner curved beam 120 and the hinge point between the outer connecting seat 7 and the outer curved beam 130 are also located on the same side. This layout design can ensure that during the operation of the wheel, the vibration is effectively shared and absorbed by the two shock absorbing units, thereby improving the overall shock absorbing effect.

[0058] Specifically, in this embodiment, the third vertical shock absorbing unit 13 and the fourth vertical shock absorbing unit 14 are both sleeve-type shock absorbers, including an inner tube and an outer tube, the inner tube slides in the outer tube, and absorbs and reduces vibrations through the flow of liquid or gas in the tube.

[0059] See also Figure 8As shown, according to some embodiments of the present invention, the inner curved beam 120 includes a first main body 121, both ends of the first main body 121 are provided with a first curved portion 122 that bends downward, and the end of the first curved portion 122 is provided with a second curved portion 123 that bends toward the corresponding outer curved beam 130; the outer curved beam 130 includes a second main body 131, both ends of the second main body 131 are provided with a third curved portion 132 that bends downward, and the end of the third curved portion 132 is connected to the end of the second curved portion 123. By providing the first curved portion 122 and the second curved portion 123 that bend downward at the front and rear ends of the inner curved beam 120 and the outer curved beam 130, the frame 1 is made into a streamlined structure as a whole, which can reduce the wind resistance generated by the frame 1 part when the rail vehicle is running, thereby further improving the vehicle speed. In addition, by providing the second curved portion 123, it is convenient to connect the inner curved beam 120 and the outer curved beam 130, and a sufficient accommodation space is left between the inner curved beam 120 and the outer curved beam 130 to accommodate the wheels.

[0060] Specifically, the end of the second curved portion 123 and the end of the third curved portion 132 may be directly connected, or may be indirectly connected via other components (such as the support seat 15 described below).

[0061] See also Figures 1 to 8 As shown, according to some embodiments of the present invention, a support seat 15 is provided between the end of the third curved portion 132 and the end of the second curved portion 123, and a fifth vertical shock absorbing unit 16 is provided on the top of the support seat 15, and the top of the fifth vertical shock absorbing unit 16 is used to connect with the vehicle body. By providing the fifth vertical shock absorbing unit 16, additional support can be provided when the vehicle is subjected to vertical force, reducing the transmission of vibration to the vehicle body and enhancing the stability of the vehicle body. In addition, by evenly arranging the fifth vertical shock absorbing unit 16 at the four corners of the frame 1, the load can be evenly shared and the service life of the suspension system can be extended.

[0062] Specifically, in this embodiment, the fifth vertical shock absorbing unit 16 is a double-layer airbag air spring. The double-layer airbag design can provide a larger airbag volume, so that the air spring can effectively absorb and buffer road vibration. In addition, the double-layer airbag design enables the air spring to adjust the air pressure according to the load change of the vehicle, thereby maintaining the horizontal posture of the vehicle body.

[0063] See also Figure 1 and Figure 2As shown, according to some embodiments of the present invention, a sixth vertical shock absorbing unit 17 is provided on the third curved portion 132. By providing the sixth vertical shock absorbing unit 17 on the third curved portion 132, the four sixth vertical shock absorbing units 17 can cooperate with the four fifth vertical shock absorbing units 16 arranged at the four corners of the frame 1 to achieve coordinated shock absorption, balanced vibration control, and each shock absorbing unit plays a role at a different position of the vehicle body, which can more comprehensively absorb and isolate road vibration.

[0064] See also Figure 5 As shown, according to some embodiments of the present invention, the side wall of the support seat 15 is provided with a fixing seat, and the fixing seat is provided with a seventh vertical shock absorbing unit 18. By arranging the seventh vertical shock absorbing unit 18 on the side of each fixing seat, the four seventh vertical shock absorbing units 18 can cooperate with the four fifth vertical shock absorbing units 16 arranged at the four corners of the frame 1 to achieve coordinated shock absorption, and balanced vibration control. Each shock absorbing unit plays a role at a different position of the vehicle body, and can more comprehensively absorb and isolate road vibration.

[0065] Specifically, in this embodiment, the sixth vertical shock absorbing unit 17 and the seventh vertical shock absorbing unit 18 also adopt sleeve-type shock absorbers.

[0066] See also Figures 1 to 5 As shown, according to some embodiments of the present invention, the bogie system further includes a traction device 19, a first lateral shock absorbing unit 20 is provided between the traction device 19 and the cross beam 110 along a first direction, and a second lateral shock absorbing unit 21 is provided between the traction device 19 and the inner curved beam 120 along a second direction; one end of the first lateral shock absorbing unit 20 is hinged to the traction device 19, and the other end of the first lateral shock absorbing unit 20 is hinged to the cross beam 110, one end of the second lateral shock absorbing unit 21 is hinged to the traction device 19, and the other end of the second lateral shock absorbing unit 21 is hinged to the inner curved beam 120. By providing the traction device 19 and providing the first lateral shock absorbing unit 20 and the second lateral shock absorbing unit 21 between the traction device 19 and the frame 1, the traction device 19 can transmit the traction force and braking force of the train, which is used to be connected to the car body, and the first lateral shock absorbing unit 20 and the second lateral shock absorbing unit 21 can reduce the horizontal vibration generated when the bogie system is running, thereby reducing the noise and vibration generated during the operation of the rail vehicle.

[0067] Specifically, in this embodiment, articulated seats 22 are provided at corresponding positions of the cross beam 110 and the traction device 19 , and both ends of the first lateral shock absorbing unit 20 and the second lateral shock absorbing unit 21 are respectively hinged through the corresponding articulated seats 22 .

[0068] See also Figure 3As shown, according to some embodiments of the present invention, an anti-torsion axle bridge 23 is provided between the bottoms of the two inner connecting seats 6. By providing the anti-torsion axle bridge 23 between the bottoms of the two inner connecting seats 6, the anti-torsion capability of the bogie system can be effectively improved. The anti-torsion axle bridge 23 connects the two inner connecting seats 6 to ensure that they remain stable when subjected to force, reduce deformation and stress concentration caused by torsion, enhance the overall rigidity and stability of the bogie system, help balance the force on the car body, and improve the running stability and controllability of the train.

[0069] See also Figure 3 As shown, according to some embodiments of the present invention, a transverse reinforcing rod 140 is provided between the inner curved beam 120 and the outer curved beam 130. By providing the transverse reinforcing rod 140 between the inner curved beam 120 and the outer curved beam 130, the connection strength between the inner curved beam 120 and the outer curved beam 130 can be enhanced.

[0070] See also Figure 4 As shown, according to some embodiments of the present invention, a longitudinal reinforcing rod 150 is provided between the two cross beams 110. By providing the longitudinal reinforcing rod 150 between the two cross beams 110, the structural strength of the frame 1 can be improved, and the deformation resistance of the frame 1 can be improved.

[0071] See also Figure 4 As shown, according to some embodiments of the present invention, a sensor box 8 is provided on the outer end surface of the outer connection seat 7, and a sensor module is provided in the sensor box 8. By arranging the sensor module on the outer connection seat 7, various state parameters of the bogie system, such as speed, temperature and vibration, can be monitored in real time.

[0072] Specifically, two sensor boxes 8 are symmetrically arranged along the left-right direction and are fixed to the end cover of the external connection base 7 by bolts. The sensor module includes a speed sensor, a temperature sensor, a vibration sensor, and the like.

[0073] The rail vehicle provided by the present invention is described below. The rail vehicle described below and the bogie system described above can be referred to each other.

[0074] A rail vehicle provided in an embodiment of the present invention comprises a car body and a bogie as described in any of the above embodiments, wherein the bogie is connected to the car body.

[0075] The rail vehicle provided by the present invention adopts the above-mentioned bogie system, and therefore can eliminate the defects of traditional rail vehicles that are prone to serpentine motion when traveling at high speeds and have poor performance when passing through small-radius curves, thereby improving stability during operation.

[0076] Specifically, the traction device 19 of the bogie system is connected to the vehicle body and is used to pull the vehicle body to move. The upper end of the sixth vertical damping unit 17 and / or the seventh vertical damping unit 18 is connected to the vehicle body.

[0077] See also Fig.10 As shown, when the rail vehicle using the bogie system provided by the present invention passes through a curve with a radius of 7000m at a speed of 350km / h during an experiment, it can be seen that the derailment coefficient is significantly smaller under controlled conditions than under uncontrolled conditions, which also verifies that the rail vehicle using the bogie system provided by the present invention is far superior to traditional rail vehicles when passing through curves.

[0078] In addition, when rail vehicles are running at high speed, the wheels move up and down during the vibration process, and the wheel weight between the wheelsets will increase or decrease. If the wheel weight reduction rate is too large, it is likely to cause derailment. According to GB-5599-2019, the wheel weight reduction rate should be lower than 0.8 when the speed is greater than 160km / h to meet the requirements.

[0079] See also Fig. 9 and Fig.10 As shown, the wheel weight reduction rate of the bogie system provided by the present invention in the dynamic test is lower than 0.3, which is far less than the national standard requirement. This shows that the bogie system provided by the present invention, by adopting the above-mentioned frame 1 form and the corresponding shock-absorbing structure, reduces the wheel weight change caused by vibration, significantly improves the stability of the vehicle, and reduces the risk of derailment.

[0080] It can be seen from the description of the above embodiments that the bogie system and rail vehicle provided by the present invention have at least the following advantages.

[0081] (1) The bogie system provided by the present invention can eliminate the defects of traditional rail vehicles that they are prone to serpentine motion when traveling at high speed and have poor performance when passing through small radius curves, thereby improving the stability during operation. By setting the frame 1 as a structural form of two crossbeams 110, two inner curved beams 120 and two outer curved beams 130, and cooperating with the inner connecting seat 6 and the outer connecting seat 7 located on both sides of the wheel, the wheel can form a triangular support (see Figure 3 ), which greatly improves the stability of the wheel during operation.

[0082] (2) The bogie system provided by the present invention has a streamlined structure in the frame 1, and the bogie can minimize the influence of resistance during operation. The first wheel 4 and the second wheel 5 are both directly driven by the motor, and the gear box transmission is abandoned, which minimizes the output loss of the motor and can greatly reduce the total weight of the bogie system, which is conducive to further improving the vehicle speed. The first drive motor 2 and the second drive motor 3 are both lightweight DC motors. The lightweight DC motor is light in weight and can be easily integrated and installed in the bogie system, and meets the design requirements of the lightweight bogie system. The above settings can also reduce the overall weight of the bogie system, which helps to increase the vehicle speed.

[0083] (3) The bogie system provided by the present invention, by providing a third vertical shock absorbing unit 13, and configuring the side of the inner connecting seat 6 away from the third vertical shock absorbing unit 13 to be hinged with the inner curved beam 120, and by providing a fourth vertical shock absorbing unit 14, and configuring the side of the outer connecting seat 7 away from the fourth vertical shock absorbing unit 14 to be hinged with the outer curved beam 130, can allow the inner connecting seat 6 and the inner curved beam 120, and the outer connecting seat 7 and the outer curved beam 130 to perform a certain relative movement when subjected to force, so as to help reduce the stress directly transmitted to the wheels and the frame 1 due to vibration, and cooperate with the third vertical shock absorbing unit 13 and the fourth vertical shock absorbing unit 14 provided on the opposite side to further support and buffer vibration.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A bogie system, characterized in that: include: A frame, the frame comprising two cross beams, two inner curved beams and two outer curved beams, the two cross beams are arranged at intervals along a first direction, the two inner curved beams are arranged at intervals along a second direction, the cross beam is arranged between the two inner curved beams, and the two ends of the cross beam are respectively connected to the inner curved beams located on the corresponding side, the outer curved beams are located on the outer side of the corresponding inner curved beams, the two ends of the inner curved beams are respectively connected to the two ends of the outer curved beams on the same side, and an accommodation space is provided between the middle of the inner curved beam and the middle of the outer curved beam; A steering assembly, the steering assembly comprising a first drive motor, a second drive motor, a first wheel and a second wheel, the first drive motor and the second drive motor are both connected to the crossbeam, the first wheel is drivingly connected to an output shaft of the first drive motor, the second wheel is drivingly connected to an output shaft of the second drive motor, and the first wheel and the second wheel are respectively located in the corresponding accommodation space; An auxiliary support assembly, the auxiliary support assembly includes two auxiliary support units, the auxiliary support unit includes an inner connecting seat and an outer connecting seat, the two ends of the first wheel are rotatably connected to the corresponding inner connecting seat and the corresponding outer connecting seat respectively, the two ends of the second wheel are rotatably connected to the corresponding inner connecting seat and the corresponding outer connecting seat respectively, the top of the inner connecting seat is connected to the inner curved beam, and the top of the outer connecting seat is connected to the outer curved beam.

2. The bogie system according to claim 1, characterized in that: A first vertical shock absorbing unit is provided between the inner connecting seat and the inner curved beam, and a second vertical shock absorbing unit is provided between the outer connecting seat and the outer curved beam. The first vertical shock absorbing unit and the second vertical shock absorbing unit are both located on a vertical plane where the center lines of the first wheel and the second wheel are located.

3. The bogie system according to claim 2, characterized in that: A third vertical shock absorbing unit is also provided between the inner connecting seat and the inner curved beam, the lower end of the third vertical shock absorbing unit is hinged to the side of the inner connecting seat, the upper end of the third vertical shock absorbing unit is hinged to the bottom of the inner curved beam, and the side of the inner connecting seat facing away from the third vertical shock absorbing unit is hinged to the inner curved beam.

4. The bogie system according to claim 3, characterized in that: A fourth vertical shock absorbing unit is also provided between the external connecting seat and the external curved beam, the lower end of the fourth vertical shock absorbing unit is hinged to the side of the external connecting seat, the upper end of the fourth vertical shock absorbing unit is hinged to the bottom of the external curved beam, and the side of the external connecting seat facing away from the fourth vertical shock absorbing unit is hinged to the external curved beam.

5. The bogie system according to claim 1, characterized in that: The inner curved beam comprises a first main body portion, both ends of the first main body portion are provided with a first curved portion curved downward, and the end of the first curved portion is provided with a second curved portion curved toward the corresponding outer curved beam; The outer curved beam comprises a second main body portion, and both ends of the second main body portion are provided with a third curved portion curved downward, and the end of the third curved portion is connected to the end of the second curved portion.

6. The bogie system according to claim 5, characterized in that: A support seat is provided between the end of the third curved portion and the end of the second curved portion, a fifth vertical shock absorbing unit is provided on the top of the support seat, and the top of the fifth vertical shock absorbing unit is used to be connected to the vehicle body; And / or, a sixth vertical damping unit is provided on the third curved portion; And / or, a fixing seat is provided on the side wall of the supporting seat, and a seventh vertical shock absorbing unit is provided on the fixing seat.

7. The bogie system according to any one of claims 1 to 6, characterized in that: It also includes a traction device, wherein a first lateral shock absorbing unit is provided between the traction device and the cross beam along the first direction, and a second lateral shock absorbing unit is provided between the traction device and the inner curved beam along the second direction; One end of the first lateral shock absorbing unit is hinged to the traction device, and the other end of the first lateral shock absorbing unit is hinged to the cross beam. One end of the second lateral shock absorbing unit is hinged to the traction device, and the other end of the second lateral shock absorbing unit is hinged to the inner bending beam.

8. The bogie system according to any one of claims 1 to 6, characterized in that: An anti-torsion shaft bridge is provided between the bottoms of the two inner connecting seats; and / or, a transverse reinforcement rod is provided between the inner curved beam and the outer curved beam; And / or, a longitudinal reinforcing rod is provided between the two cross beams.

9. The bogie system according to any one of claims 1 to 6, characterized in that: A sensor box is disposed on the outer end surface of the external connection seat, and a sensor module is disposed in the sensor box.

10. A rail vehicle, characterized in that: The invention comprises a car body and a bogie system as claimed in any one of claims 1 to 9, wherein the bogie system is connected to the car body.

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