Low-floor tramcar bogie and low-floor tramcar

Abstract

The low-floor tramcar bogie is used for driving a tramcar body to walk along a rail, the low-floor tramcar bogie comprises a framework assembly, the framework assembly comprises a first framework and a second framework which are rotationally matched with each other, and the first framework and the second framework are each provided with a set of wheel pair assembly; the first framework and the second framework are driven by the wheel pair assembly to walk along the track, a primary suspension assembly used for buffering is arranged between the wheel pair assembly and the framework assembly, and a secondary suspension assembly used for buffering is arranged between the framework assembly and the vehicle body, so that the vehicle body can stably run. Through running fit between the first framework and the second framework, the first framework and the second framework can flexibly rotate in the turning process, the turning radius of the bogie is reduced, a track can be laid in a narrower area, and the bogie can drive a vehicle body to run along the track in the narrower area; and the trafficability of the tramcar is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the tramcar technical field, more particularly, to a low-floor tramcar bogie and a low-floor tramcar. BACKGROUND

[0002] In the prior art, the low-floor tramcar has a wide application in the scenes of tourism, city connection and the like due to its low-floor design and low cost advantage; however, the tramcar has a low passability in the running process due to the track laying limitation in some old city areas and the like, which causes a safety hazard in the running process of the tramcar.

[0003] In summary, how to improve the passability of the low-floor tramcar is a problem to be solved by the person skilled in the art at present. SUMMARY

[0004] Therefore, the present application aims to provide a low-floor tramcar bogie and a low-floor tramcar to improve the passability of the low-floor tramcar.

[0005] In order to achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0006] A low-floor tramcar bogie is used to drive a car body of a tramcar to run along a track, and the bogie comprises: a frame assembly, the frame assembly comprising a first frame and a second frame, the first frame being rotationally connected with the second frame, and the first frame and the second frame being sequentially arranged along a first direction; a wheel set assembly, the first frame and the second frame each being provided with a group of wheel set assemblies, the wheel set assemblies driving the first frame and the second frame to run along the track; a primary suspension assembly, the primary suspension assembly being arranged between the wheel set assembly and the frame assembly, and the primary suspension assembly being used to buffer the impact between the wheel set assembly and the frame assembly; and a secondary suspension assembly, the secondary suspension assembly being arranged between the frame assembly and the car body, and the secondary suspension assembly being used to buffer the impact between the frame assembly and the car body.

[0007] In some embodiments, the first frame comprises a first cross beam, a first longitudinal beam and a first connecting beam; the first longitudinal beam extends along the first direction, and there are two first longitudinal beams, which are sequentially arranged along a second direction; the first cross beam connects first ends of the two first longitudinal beams, and the first connecting beam connects second ends of the two first longitudinal beams, the first cross beam and the first connecting beam both extend along the second direction, and the first cross beam and the first connecting beam are sequentially arranged along the first direction;

[0008] The second frame comprises a second cross beam, a second longitudinal beam and a second connecting beam; the second longitudinal beam extends along the first direction, and there are two second longitudinal beams which are arranged in sequence along the second direction; the second connecting beam connects the first ends of the two second longitudinal beams, and the second cross beam connects the second ends of the two second longitudinal beams; the second connecting beam and the second cross beam extend along the second direction, and the second connecting beam and the second cross beam are arranged in sequence along the first direction.

[0009] One of the first connecting beam and the second connecting beam is provided with an inter-frame connecting joint interface, and the other is provided with an inter-frame connecting joint; the inter-frame connecting joint interface corresponds to the inter-frame connecting joint and is connected by a connecting pin, so that the first frame and the second frame are rotationally connected with the axis of the connecting pin as the reference; the first direction and the second direction have an included angle.

[0010] In some embodiments, the inter-frame connecting joint is a metal rubber pin sleeve, and the metal rubber pin sleeve is connected with the connecting pin without a gap.

[0011] In some embodiments, the wheel pair assembly comprises:

[0012] An axle bridge is located at the bottom of the first longitudinal beam and the second longitudinal beam, two ends of the axle bridge are connected with wheels, the length direction of the axle bridge extends along the second direction, and two ends of the axle bridge are connected with a connecting bridge which extends along the first direction; a rotating arm shaft is arranged on the connecting bridge, and the axis of the rotating arm shaft is consistent with the second direction; a driving motor is in transmission connection with the wheels, and the driving motor corresponds to the wheels one by one; the first frame comprises a first mounting beam provided with a first motor hanger, and the second frame comprises a second mounting beam provided with a second motor hanger; the first motor hanger and the second motor hanger are used for mounting the driving motor, and the driving motor is a permanent magnet direct drive motor.

[0013] In some embodiments, a first rotating arm positioning seat is arranged on the first cross beam and is in interference fit with the rotating arm shaft; and a second rotating arm positioning seat is arranged on the second cross beam and is in interference fit with the rotating arm shaft.

[0014] In some embodiments, the rotating arm shaft is a rubber node.

[0015] In some embodiments, the connecting bridge is provided with a primary suspension mounting seat away from the other end of the swing arm spindle; the primary suspension assembly is a conical rubber spring, which is mounted on the primary suspension mounting seat, and the axis of the conical rubber spring has a spacing distance with the axis of the axle bridge in the first direction.

[0016] In some embodiments, the secondary suspension assembly comprises: laminated springs, conical springs, lateral stops, lateral dampers, vertical dampers, interframe dampers, side beams; the laminated springs are mounted on the middle part of the first and second longitudinal beams, the top of the two laminated springs is connected to the same side beam, and the side beam extends in the first direction, and the top of the side beam is connected to the conical spring; the inner side of the first and second longitudinal beams is provided with a lateral stop seat interacting with the lateral stop; the first connecting beam is provided with a first lateral damper seat away from one side of the interframe connecting joint interface, the second connecting beam is provided with a second lateral damper seat away from one side of the interframe connecting joint, and the first and second lateral damper seats are used for mounting the lateral dampers, and the axis of the lateral damper is consistent with the second direction; the first mounting beam is provided with a first longitudinal stop, a first interframe damper seat and a first vertical damper seat, the second mounting beam is provided with a second longitudinal stop, a second interframe damper seat and the second vertical damper seat, the interframe damper is connected between the first and second interframe damper seats, and the first and second vertical damper seats are used for mounting the vertical dampers.

[0017] In some embodiments, the bottom of the first and second frames is provided with a magnetic rail brake, which cooperates with the rail brake; the first longitudinal beam is provided with a first brake hanger seat, and the second longitudinal beam is provided with a second brake hanger seat, the first and second brake hanger seats are provided with a basic brake, and the basic brake cooperates with the wheel set assembly to brake.

[0018] In some embodiments, further comprising a running mechanism, which is located at the top of the secondary suspension assembly, and is used for connecting the secondary suspension assembly and the vehicle body.

[0019] A low-floor tramcar, comprising a low-floor tramcar bogie as described above.

[0020] The low-floor tram bogie provided by the application is used for driving a tram car body to run along a track, comprising a frame assembly, the frame assembly comprising a first frame and a second frame capable of rotating and matching with each other, and the first frame and the second frame are sequentially distributed along a first direction, a set of wheel pair assemblies are arranged on the first frame and the second frame to drive the first frame and the second frame to run along the track, a primary suspension assembly for buffering is arranged between the wheel pair assemblies and the frame assembly, and a secondary suspension assembly for buffering is arranged between the frame assembly and the car body, so that the bogie can drive the car body to stably run, thus, through the rotating and matching between the first frame and the second frame, the first frame and the second frame can flexibly rotate during turning, the turning radius of the bogie is reduced, the track can be laid in a narrower area, and the bogie can drive the car body to run along the track in the narrower area, and the passability of the tram is improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of the provided drawings.

[0022] Figure 1 A structure schematic diagram of the low-floor tram bogie provided by the embodiment of the present application is shown in the figure.

[0023] Figure 2 A structure schematic diagram of the frame assembly provided by the embodiment of the present application is shown in the figure.

[0024] Figure 3 A structure schematic diagram of the first single-wheel-pair bogie in the low-floor tram bogie provided by the embodiment of the present application is shown in the figure.

[0025] Figure 4 A structure schematic diagram of the second single-wheel-pair bogie in the low-floor tram bogie provided by the embodiment of the present application is shown in the figure.

[0026] Figure 5 A structure schematic diagram of the wheel pair assembly provided by the embodiment of the present application is shown in the figure.

[0027] Figure 6 A structure schematic diagram of the secondary suspension assembly provided by the embodiment of the present application is shown in the figure.

[0028] Figure 7 A structure schematic diagram of the inter-frame connecting joint provided by the embodiment of the present application is shown in the figure.

[0029] Figure 8 A structure schematic diagram of the inter-frame connecting joint provided by the embodiment of the present application is shown in the figure. Figure 7Structure schematic diagram of the connecting pin of the inter-structure connecting joint shown;

[0030] Figure 9 A schematic diagram of the connection between the bogie and the running mechanism provided for the embodiment of the present application.

[0031] Legend of reference signs:

[0032] 100 - bogie assembly, 110 - first structure, 111 - first mounting beam, 1111 - first motor hanger, 1112 - first longitudinal stop, 1113 - first inter-structure damper seat, 1114 - first vertical damper seat, 112 - first longitudinal beam, 1121 - first brake hanger, 113 - first cross beam, 1131 - first swing arm positioning seat, 114 - first connecting beam, 1141 - first transverse damper seat, 115 - inter-structure connecting joint interface;

[0033] 120 - second structure, 121 - second mounting beam, 1211 - second motor hanger, 1212 - second longitudinal stop, 1213 - second inter-structure damper seat, 1214 - second vertical damper seat, 122 - second longitudinal beam, 1221 - second brake hanger, 123 - second cross beam, 1231 - second swing arm positioning seat, 124 - second connecting beam, 1241 - second transverse damper seat, 125 - inter-structure connecting joint;

[0034] 130 - connecting pin;

[0035] 200 - wheel set assembly, 210 - axle bridge, 220 - connecting bridge, 221 - swing arm core shaft, 222 - primary suspension mounting seat, 240 - wheel, 250 - drive motor;

[0036] 300 - primary suspension assembly;

[0037] 400 - secondary suspension assembly, 410 - laminated spring, 420 - conical spring, 430 - transverse stop, 440 - transverse damper, 450 - vertical damper, 460 - inter-structure damper, 470 - side beam;

[0038] 510 - magnetic rail brake, 520 - basic brake;

[0039] 600 - traction buffer;

[0040] 710 - first vehicle articulation device, 720 - second vehicle articulation device, 730 - running mechanism body, 740 - spherical connecting joint. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0042] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. The terms used in the following embodiments are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the specification and claims of this application, the singular expressions "one", "a kind of", "said", "above", "the" and "this" are intended to also include expressions such as "one or more", unless the context clearly indicates otherwise.

[0043] References to "one embodiment" or "some embodiments" in this specification mean that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in one or more embodiments of the present application. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in yet other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more but not all embodiments," unless otherwise specifically emphasized. The terms "including," "comprising," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0044] The "multiple" involved in the embodiments of the present application means greater than or equal to two. It should be noted that in the description of the embodiments of the present application, the words "first" and "second" are only used for the purpose of distinguishing the description and cannot be understood as indicating or implying relative importance or order.

[0045] The terms "parallel" and "perpendicular" in this application refer to "substantially parallel" and "substantially perpendicular" in actual operation. "Substantially parallel" can be understood as parallel with a certain error, and similarly, "substantially perpendicular" can be understood as perpendicular with a certain error.

[0046] like Figure 1As shown, the low-floor tram bogie provided by the embodiment of the present application is used to drive the car body of the tram to run along the track, and the bogie comprises: a frame assembly 100, the frame assembly 100 comprises a first frame 110 and a second frame 120, the first frame 110 is rotationally connected with the second frame 120, and the first frame 110 and the second frame 120 are sequentially distributed along a first direction; a wheel set assembly 200, the first frame 110 and the second frame 120 are both provided with a group of wheel set assemblies 200, so that each group of wheel set assemblies 200 can drive the first frame 110 and the second frame 120 to run along the track respectively; a primary suspension assembly 300, the primary suspension assembly 300 is arranged between the wheel set assembly 200 and the frame assembly 100, and the primary suspension assembly 300 is used to buffer the impact between the wheel set assembly 200 and the frame assembly 100; a secondary suspension assembly 400, the secondary suspension assembly 400 is arranged between the frame assembly 100 and the car body, and the secondary suspension assembly 400 is used to buffer the impact between the frame assembly 100 and the car body, so that the bogie can drive the car body to stably run; in this way, through the rotational connection between the first frame 110 and the second frame 120, the first frame 110 and the second frame 120 can flexibly rotate during the turning process, the turning radius of the bogie is reduced, the track can be laid in a narrower area, and the bogie can drive the car body to run along the track in a narrower area, and the passability of the tram is improved.

[0047] It should be noted that the first direction is the direction in which the bogie runs along the track, and during the turning process, the rotation between the first frame 110 and the second frame 120 means that the running direction of the first frame 110 and the running direction of the second frame 120 can have an included angle, so as to reduce the turning radius.

[0048] As shown in the figure, Figure 2 The first frame 110 comprises a first cross beam 113, a first longitudinal beam 112 and a first connecting beam 114; wherein the first longitudinal beam 112 extends along the first direction, there are two first longitudinal beams 112, the two first longitudinal beams 112 are sequentially distributed along a second direction, the first cross beam 113 connects the first ends of the two first longitudinal beams 112, the first connecting beam 114 connects the second ends of the two first longitudinal beams 112, the first cross beam 113 and the first connecting beam 114 both extend along the second direction, and the first cross beam 113 and the first connecting beam 114 are sequentially distributed along the first direction, so that the first frame 110 forms a quadrilateral structure, the rigidity of the frame is improved, and the overall structure of the frame is simple and light.

[0049] The second frame 120 comprises a second cross beam 123, a second longitudinal beam 122 and a second connecting beam 124; the second longitudinal beam 122 extends along the first direction, and there are two second longitudinal beams 122, which are sequentially distributed along the second direction; the second connecting beam 124 connects the first ends of the two second longitudinal beams 122, and the second cross beam 123 connects the second ends of the two second longitudinal beams 122; the second connecting beam 124 and the second cross beam 123 both extend along the second direction, and the second connecting beam 124 and the second cross beam 123 are sequentially distributed along the first direction, so that the second frame 120 forms a quadrilateral structure, thereby improving the rigidity of the frame and making the overall structure of the frame simple and light.

[0050] It should be noted that the first direction and the second direction have an included angle, which can be an acute angle, an obtuse angle or a right angle; in the embodiment of the present application, the first direction and the second direction are arranged perpendicularly in order to further improve the connection rigidity between the frames.

[0051] In order to rotate the first frame 110 and the second frame 120 together, one of the first connecting beam 114 and the second connecting beam 124 is provided with a frame connection joint interface 115, and the other is provided with a frame connection joint 125; the frame connection joint interface 115 and the frame connection joint 125 are correspondingly connected through a connecting pin 130, so that the first frame 110 and the second frame 120 rotate together with the axis of the connecting pin 130 as the reference, so that the first frame 110 and the second frame 120 can rotate flexibly along the track.

[0052] For example, as shown in Figures 3-4 the frame connection joint interface 115 is arranged on the first connecting beam 114, and the frame connection joint 125 is arranged on the second connecting beam 124, and the frame connection joint interface 115 and the frame connection joint 125 correspond; of course, the frame connection joint interface 115 can also be arranged on the second connecting beam 124, and the frame connection joint 125 can be arranged on the first connecting beam 114, which is not limited in the embodiment of the present application.

[0053] As shown in Figures 7-8 the frame connection joint 125 provided in the embodiment of the present application is a metal rubber pin sleeve, and the metal rubber pin sleeve and the connecting pin 130 are connected without gap; while ensuring the stable connection of the first frame 110 and the second frame 120, after passing through the turning area, the reset elastic force of the metal rubber pin sleeve provides a reset torque of the first frame 110 and the second frame 120 on the straight track, so as to improve the stability of the bogie during driving and reduce the safety hazard.

[0054] For example, as shown in Figures 3-5As shown, the wheel set assembly 200 comprises: an axle bridge 210 located at the bottom of the first longitudinal beam 112 and the second longitudinal beam 122, two ends of the axle bridge 210 are connected with the wheels 240, the length direction of the axle bridge 210 extends along the second direction, two ends of the axle bridge 210 are connected with the connecting bridges 220, the connecting bridges 220 extend along the first direction, the connecting bridges 220 are provided with the swing arm shafts 221, and the axes of the swing arm shafts 221 are consistent with the second direction.

[0055] Further comprising driving motors 250, the driving motors 250 are in transmission connection with the wheels 240, and the driving motors 250 correspond to the wheels 240 one by one, the first frame 110 comprises a first mounting beam 111, the first mounting beam 111 is provided with first motor hangers 1111, the second frame 120 comprises a second mounting beam 121, the second mounting beam 121 is provided with second motor hangers 1211, and the first motor hangers 1111 and the second motor hangers 1211 are used for mounting the driving motors 250, so that the driving motors 250 stably drive the wheels 240 to rotate.

[0056] In some embodiments, the driving motors 250 are permanent magnet direct drive motors, the wheels 240 can be driven by the permanent magnet direct drive motors, the transmission structure is reduced, the transmission efficiency is improved, and the overall structure of the bogie is further simplified.

[0057] As shown in the figure, Figures 3-4 The first transverse beam 113 is provided with first swing arm positioning seats 1131, the first swing arm positioning seats 1131 are in interference fit with the swing arm shafts 221 located on the first frame 110; the second transverse beam 123 is provided with second swing arm positioning seats 1231, and the second swing arm positioning seats 1231 are in interference fit with the swing arm shafts 221 located on the second frame 120.

[0058] It can be understood that the first swing arm positioning seats 1131 are two groups, each group is two, corresponding to two ends of the swing arm shaft 221; the second swing arm positioning seats 1231 are two groups, each group is two, corresponding to two ends of the swing arm shaft 221, so as to realize positioning of the wheel set assembly 200.

[0059] In the wheel set assembly 200 provided in the embodiments of the present application, the swing arm shaft 221 is a rubber node, through the abutment between the rubber node and the first swing arm positioning seat 1131 and the second swing arm positioning seat 1231, the rubber node can provide a certain deformation amount, so that the wheel set assembly 200 has a certain flexible displacement amount between the first frame 110 and the second frame 120 in the driving process, the flexibility of the bogie is further improved, and the passability of the bogie in the turning area is further improved.

[0060] As shown in the figure, Figures 3-5As shown, the connecting bridge 220 is provided with a primary suspension mounting seat 222 at the other end away from the rotating arm shaft 221, the primary suspension assembly 300 is a conical rubber spring, which is mounted on the primary suspension mounting seat 222 to provide a suspension load-carrying force to improve comfort, and the axis of the conical rubber spring has a spacing distance with the length direction of the shaft bridge 210 in the first direction, so that the conical rubber spring is eccentrically arranged, which reduces the installation space of the primary suspension assembly 300.

[0061] As shown in Figure 1 and Figure 6 The secondary suspension assembly 400 includes: laminated springs 410, conical springs 420, transverse stops 430, vertical dampers 450, interframe dampers 460, and side beams 470.

[0062] The middle part of the first longitudinal beam 112 and the second longitudinal beam 122 are both provided with laminated springs 410, the top of the two laminated springs 410 is connected to the same side beam 470, the side beam 470 extends in the first direction, the top of the side beam 470 is connected to a conical spring 420, and the conical spring 420 is a rubber spring to improve comfort.

[0063] The inner side surface of the first longitudinal beam 112 and the second longitudinal beam 122 are both provided with transverse stop seats that interact with the transverse stops 430 to limit the movement of the car body inside the bogie and reduce the shaking of the car body in the second direction.

[0064] The first connecting beam 114 is provided with a first transverse damper seat 1141 on the side away from the interframe connecting joint interface 115, and the second connecting beam 124 is provided with a second transverse damper seat 1241 on the side away from the interframe connecting joint 125, the first transverse damper seat 1141 and the second transverse damper seat 1241 are both used to mount a transverse damper 440, and the axis of the transverse damper 440 is consistent with the second direction, so as to alleviate the vibration between the car body and the bogie in the second direction through the transverse damper 440, and improve comfort.

[0065] The first mounting beam 111 is provided with a first longitudinal stop 1112, a first interframe damper seat 1113, and a first vertical damper seat 1114, and the second mounting beam 121 is provided with a second longitudinal stop 1212, a second interframe damper seat 1213, and a second vertical damper seat 1214, the interframe damper 460 is connected between the first interframe damper seat 1113 and the second interframe damper seat 1213 to alleviate the impact of the first frame 110 and the second frame 120 during operation; the first vertical damper seat 1114 and the second vertical damper seat 1214 are both used to mount a vertical damper 450 to alleviate the vibration between the car body and the bogie in the vertical direction, and further improve comfort.

[0066] As shown in Figure 1As shown, a magnetic rail brake 510 is installed at the bottom of the first frame 110 and the second frame 120. When braking is required, the magnetic rail brake 510 can absorb the rails to generate friction to achieve braking of the bogie.

[0067] A first brake mount 1121 is provided on the first longitudinal beam 112 , and a second brake mount 1221 is provided on the second longitudinal beam 122 . Both the first brake mount 1121 and the second brake mount 1221 are installed with a basic brake 520 . The basic brake 520 may be a disc brake for cooperating with the wheel 240 for braking.

[0068] like Figure 9 As shown, the bogie provided in the embodiment of the present application also includes a running mechanism, which is located at the top of the secondary suspension assembly 400. Specifically, the running mechanism includes a first vehicle articulation device 710, a second vehicle articulation device 720, a running mechanism body 730 and a spherical connection joint 740, wherein the running mechanism body 730 is located at the top of the side beam 470 and the conical spring 460, and the first vehicle articulation device 710, the second vehicle articulation device 720 and the spherical connection joint 740 are all used to connect with the vehicle body to transmit traction and braking force through the running mechanism.

[0069] like Figure 1 、 Figures 3-4 As shown, traction buffers 600 are provided on both the first crossbeam 113 and the second crossbeam 123. While the frame assembly 100 transmits traction and braking forces, the traction buffers 600 absorb impact energy, attenuate vibrations, and compensate for displacements, thereby ensuring the smooth operation of the rail train.

[0070] The present application provides a low-floor tram bogie provided in an embodiment. Through the rotational cooperation between the first frame 110 and the second frame 120, the first frame 110 and the second frame 120 can rotate flexibly during the turning process, thereby reducing the turning radius of the bogie, allowing the track to be laid in a narrower area, and allowing the bogie to drive the vehicle body along the track in a narrower area, thereby improving the passability of the tram.

[0071] An embodiment of the present application further provides a low-floor rail train, which includes the low-floor rail train bogie in the above embodiment.

[0072] Since the low-floor rail train bogie has the above-mentioned technical effects, and the low-floor rail train includes the low-floor rail train bogie, the low-floor rail train also has corresponding technical effects, which will not be described in detail here.

[0073] The above description of disclosed embodiments enables one of ordinary skill in the art to make and use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A low-floor tram bogie, used to drive the tram body along the track, characterized in that: The bogie comprises: A frame assembly (100), the frame assembly (100) comprising a first frame (110) and a second frame (120), the first frame (110) and the second frame (120) being rotationally engaged with each other, and the first frame (110) and the second frame (120) being sequentially distributed along a first direction; A wheelset assembly (200), wherein the first frame (110) and the second frame (120) are both provided with a set of the wheelset assembly (200), and the wheelset assembly (200) drives the first frame (110) and the second frame (120) to move along the track; a primary suspension assembly (300), the primary suspension assembly (300) being arranged between the wheelset assembly (200) and the frame assembly (100), the primary suspension assembly (300) being used to buffer an impact between the wheelset assembly (200) and the frame assembly (300); A secondary suspension component (400) is provided between the frame component (100) and the vehicle body, and is used to buffer impact between the frame component (100) and the vehicle body.

2. The low-floor tram bogie according to claim 1, characterized in that: The first frame (110) includes a first transverse beam (113), a first longitudinal beam (112), and a first connecting beam (114); The first longitudinal beam (112) extends along the first direction, there are two first longitudinal beams (112), and the two first longitudinal beams (112) are distributed sequentially along the second direction; the first cross beam (113) connects the first ends of the two first longitudinal beams (112), the first connecting beam (114) connects the second ends of the two first longitudinal beams (112), the first cross beam (113) and the first connecting beam (114) both extend along the second direction, and the first cross beam (113) and the first connecting beam (114) are distributed sequentially along the first direction; The second frame (120) includes a second transverse beam (123), a second longitudinal beam (122), and a second connecting beam (124); The second longitudinal beam (122) extends along the first direction, there are two second longitudinal beams (122), and the two second longitudinal beams (122) are distributed in sequence along the second direction; the second connecting beam (124) connects the first ends of the two second longitudinal beams (122), the second cross beam (123) connects the second ends of the two second longitudinal beams (122), the second connecting beam (124) and the second cross beam (123) both extend along the second direction, and the second connecting beam (124) and the second cross beam (123) are distributed in sequence along the first direction; One of the first connecting beam (114) and the second connecting beam (124) is provided with an inter-frame connection joint interface (115), and the other is provided with an inter-frame connection joint (125); The inter-frame connection joint interface (115) corresponds to the inter-frame connection joint (125) and is connected via a connection pin (130), so that the first frame (110) and the second frame (120) are rotationally matched with each other based on the axis of the connection pin (130); An included angle is formed between the first direction and the second direction.

3. The low-floor tram bogie according to claim 2, characterized in that: The inter-frame connecting joint (125) is a metal rubber pin sleeve, and the metal rubber pin sleeve is connected to the connecting pin (130) without a gap.

4. The low-floor tram bogie according to claim 2, characterized in that: The wheelset assembly (200) comprises: an axle bridge (210), the axle bridge (210) being located at the bottom of the first longitudinal beam (112) and the second longitudinal beam (122), wheels (240) being connected to both ends of the axle bridge (210), a length direction of the axle bridge (210) extending along the second direction, connecting bridges (220) being connected to both ends of the axle bridge (210), the connecting bridge (220) extending along the first direction, a rotating arm core shaft (221) being provided on the connecting bridge (220), and an axis of the rotating arm core shaft (221) being consistent with the second direction; A drive motor (250) is connected to the wheel (240) in a transmission manner, and the drive motor (250) corresponds to the wheel (240) in a one-to-one manner. The first frame (110) includes a first mounting beam (111), and the first mounting beam (111) is provided with a first motor hanger (1111). The second frame (120) includes a second mounting beam (121), and the second mounting beam (121) is provided with a second motor hanger (1211). The first motor hanger (1111) and the second motor hanger (1211) are both used for mounting the drive motor (250), and the drive motor (250) is a permanent magnet direct drive motor.

5. The low-floor tram bogie according to claim 4, characterized in that: A first rotating arm positioning seat (1131) is provided on the first crossbeam (113), and the first rotating arm positioning seat (1131) is interference-fitted with the rotating arm core shaft (221); A second rotating arm positioning seat (1231) is provided on the second crossbeam (123), and the second rotating arm positioning seat (1231) is interference-fitted with the rotating arm core shaft (221).

6. The low-floor tram bogie according to claim 5, characterized in that: The rotating arm core shaft (221) is a rubber node.

7. The low-floor tram bogie according to claim 4, characterized in that: A suspension mounting seat (222) is provided at the other end of the connecting bridge (220) away from the rotating arm core shaft (221); The primary suspension component (300) is a conical rubber spring, which is mounted on the primary suspension mounting seat (222), and an axis of the conical rubber spring is spaced apart from a length direction of the axle bridge (210) in the first direction.

8. The low-floor tram bogie according to claim 4, characterized in that: The secondary suspension assembly (400) comprises: a laminated spring (410), a conical spring (420), a lateral stopper (430), a lateral shock absorber (440), a vertical shock absorber (450), an inter-frame shock absorber (460), and a side beam (470); The laminated spring (410) is installed in the middle of the first longitudinal beam (112) and the second longitudinal beam (122), the tops of the two laminated springs (410) are connected to the same side beam (470), and the side beam (470) extends along the first direction, and the top of the side beam (470) is connected to the conical spring (420); The inner side surfaces of the first longitudinal beam (112) and the second longitudinal beam (122) are both provided with a transverse stop seat that interacts with the transverse stop (430); A first lateral vibration damper seat (1141) is provided on a side of the first connecting beam (114) away from the inter-frame connecting joint interface (115), and a second lateral vibration damper seat (1241) is provided on a side of the second connecting beam (124) away from the inter-frame connecting joint (125). Both the first lateral vibration damper seat (1141) and the second lateral vibration damper seat (1241) are used to mount the lateral vibration damper (440), and the axis of the lateral vibration damper (440) is consistent with the second direction. The first mounting beam (111) is provided with a first longitudinal stopper (1112), a first inter-frame shock absorber seat (1113) and a first vertical shock absorber seat (1114); the second mounting beam (121) is provided with a second longitudinal stopper (1212), a second inter-frame shock absorber seat (1213) and a second vertical shock absorber seat (1214); the inter-frame shock absorber (460) is connected between the first inter-frame shock absorber seat (1113) and the second inter-frame shock absorber seat (1213); and the first vertical shock absorber seat (1114) and the second vertical shock absorber seat (1214) are both used for mounting the vertical shock absorber (450).

9. The low-floor tram bogie according to claim 2, characterized in that: A magnetic rail brake (510) is installed at the bottom of the first frame (110) and the second frame (120), and the magnetic rail brake (510) cooperates with the track brake; A first brake hanger (1121) is provided on the first longitudinal beam (112), and a second brake hanger (1221) is provided on the second longitudinal beam (122). Both the first brake hanger (1121) and the second brake hanger (1221) are installed with a foundation brake (520), and the foundation brake (520) cooperates with the wheelset assembly (200) for braking.

10. The low-floor tram bogie according to any one of claims 1 to 9, characterized in that: It also includes a running mechanism, which is located on the top of the secondary suspension component (400) and is used to connect the secondary suspension component (400) and the vehicle body.

11. A low-floor tram, characterized in that: The low-floor tram bogie comprises the low-floor tram bogie according to any one of claims 1 to 10.

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