A radial guiding device for an independent wheel set bogie of a low-floor train

Abstract

The present invention discloses a radial guiding device for an independent wheel pair bogie of a low-floor train, which includes an installation unit comprising a bogie body, two axle bridge devices arranged at both ends of the bogie body, and independent wheels arranged on both sides of the two axle bridge devices; and a guiding unit comprising two guiding components arranged between the two axle bridge devices. This radial guiding device for an independent wheel pair bogie of a low-floor train connects the front and rear independent wheel pairs through four connecting parts and two coupling parts arranged crosswise, and by means of the turning moment generated by the gravity restoring forces of the left and right wheels, improves the automatic centering ability of the low-floor train during straight-line operation and the automatic guiding ability during curved-line operation, reduces wheel-rail friction, and lowers the risk of vehicle derailment.

Description

Technical Field

[0001] The present invention relates to the technical field of railway locomotives and vehicles, and in particular to a radial guide device for an independent wheelset bogie of a low-floor train. Background Art

[0002] The development of rapid rail transit can effectively alleviate urban traffic congestion. Low-floor trains have become the primary choice for rail transit in large and medium-sized cities due to their advantages, such as the elimination of high platforms, convenient boarding and alighting, and economical construction costs. Currently, both domestic and international approaches to achieving low-floor passenger compartments tend to utilize independently rotating wheel bogie technology. This technology eliminates the wheel axle, decoupling the left and right wheels to create a continuous vehicle body. Furthermore, the position and diameter of the independent wheels do not affect the layout of the low-floor.

[0003] Independent wheelset bogie vehicles can run at higher speeds, but theoretically there is no longitudinal creep force and creep torque. Therefore, the independent wheelset's centering and guiding capabilities are insufficient, the wheel flanges are severely worn, and the risk of derailment increases. In order to overcome the above shortcomings, it is often necessary to design special bogies or take special guiding measures.

[0004] Bogies are inherently complex and compact in structure, and considering guidance issues further increases their design complexity. For independent wheelset bogies already in production, it is desirable to minimize the need for major modifications. Therefore, it is necessary to consider the structural characteristics of independent wheelset bogies, not only to reduce the design difficulty of the bogies themselves, but also to avoid complex modifications to bogies already in operation. To this end, the present invention provides a radial guide device for an independent wheelset bogie on a low-floor train. Summary of the Invention

[0005] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of this application to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions should not be used to limit the scope of the present invention.

[0006] The present invention is proposed in view of the fact that the independent wheelset bogies of the above-mentioned existing low-floor trains do not have longitudinal creep force and creep torque, and therefore lack straight-line centering and curve guiding capabilities, resulting in excessive attack angles when passing curves and severe wheel flange wear.

[0007] Therefore, an object of the present invention is to provide a radial guide device for an independent wheelset bogie of a low-floor train.

[0008] To solve the above technical problems, the present invention provides the following technical solutions: an installation unit, including a bogie body, two axle bridge devices disposed at both ends of the bogie body, and independent wheels disposed on both sides of the two axle bridge devices; and a guiding unit, including two guiding components disposed between the two axle bridge devices.

[0009] As a preferred solution of the independent wheel pair bogie radial guiding device of the low-floor train of the present invention, wherein: the bogie body includes two side beams horizontally disposed on both sides, end beams disposed at both ends of the two side beams, and a cross beam disposed in the middle of the two side beams.

[0010] As a preferred solution of the independent wheel pair bogie radial guiding device of the low-floor train of the present invention, wherein: the two independent wheels on both sides of the end beam form an independent wheel pair.

[0011] As a preferred solution of the independent wheel pair bogie radial guiding device of the low-floor train of the present invention, wherein: the two axle bridge devices are respectively disposed inside the two end beams, and each axle bridge device includes two axle boxes, an axle bridge body disposed on the two axle boxes, and a short axle disposed between the axle box and the independent wheel.

[0012] As a preferred solution of the independent wheel pair bogie radial guiding device of the low-floor train of the present invention, wherein: the guiding component includes four connecting parts disposed between the two axle bridge bodies and the cross beam, and two coupling parts crosswise disposed between the four connecting parts.

[0013] As a preferred solution of the independent wheel pair bogie radial guiding device of the low-floor train of the present invention, wherein: the connecting part includes a first support disposed on the axle bridge body, a second support disposed on the cross beam, a pull rod and a connecting rod disposed between the first support and the second support; both ends of the pull rod are respectively connected to the first support and the connecting rod, and the middle end of the connecting rod is connected to the second support.

[0014] As a preferred solution of the independent wheel pair bogie radial guiding device of the low-floor train of the present invention, wherein: the first support includes a first seat body disposed on the axle bridge body, and a first spherical hinge mounting groove disposed in the middle of the first seat body; the pull rod includes a first rod body, and spherical hinge shafts disposed at both ends of the first rod body, and one of the spherical hinge shafts is matched with the first spherical hinge mounting groove, and the other spherical hinge shaft is matched with the connecting rod.

[0015] As a preferred embodiment of the radial guiding device for the independent wheel set bogie of the low-floor train according to the present invention, the following is provided: the second support includes a second body disposed on the cross beam, a mounting groove disposed in the middle of the second body, and a first pin hole disposed on the second body and passing through the mounting groove.

[0016] As a preferred embodiment of the radial guiding device for the independent wheel set bogie of the low-floor train according to the present invention, the following is provided: the connecting rod includes a second rod body in an arc shape, a second ball joint mounting groove disposed at one end of the second rod body and cooperating with the ball joint shaft, a second pin hole disposed at the other end of the second rod body and cooperating with the coupling portion, and a third pin hole disposed in the middle of the second rod body and cooperating with the first pin hole.

[0017] As a preferred embodiment of the radial guiding device for the independent wheel set bogie of the low-floor train according to the present invention, the following is provided: the coupling portion includes a third rod body with bent ends, fourth pin holes disposed at both ends of the third rod body, and the two fourth pin holes respectively cooperate with two connecting rods in a crossed position.

[0018] As a preferred embodiment of the radial guiding device for the independent wheel set bogie of the low-floor train according to the present invention, the following is provided: the two third rod bodies are respectively located on both sides of the cross beam.

[0019] The beneficial effects of the present invention: Four connecting portions and two crossed coupling portions connect the front and rear independent wheel sets. By means of the turning moment generated by the restoring forces of the left and right wheel gravities, the automatic centering ability during straight-line running of the low-floor train and the automatic guiding ability during curved-line running are improved, the wheel-rail friction is reduced, and the risk of vehicle derailment is lowered. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. Among them:

[0021] Figure 1 It is a schematic diagram of the overall structure of the radial guiding device for the independent wheel set bogie of the low-floor train according to the present invention.

[0022] Figure 2 is Figure 1 an enlarged view of area A in

[0023] Figure 3 It is a schematic diagram of the structure of the first support of the radial guiding device for the independent wheel set bogie of the low-floor train according to the present invention.

[0024] Figure 4 This is a schematic structural view of the second support of the radial guiding device for the independent wheel pair bogie of the low-floor train of the present invention.

[0025] Figure 5 This is a schematic structural view of the tie rod of the radial guiding device for the independent wheel pair bogie of the low-floor train of the present invention.

[0026] Figure 6 This is a schematic structural view of the connecting rod of the radial guiding device for the independent wheel pair bogie of the low-floor train of the present invention.

[0027] Figure 7 This is a schematic structural view of the coupling part of the radial guiding device for the independent wheel pair bogie of the low-floor train of the present invention. Detailed implementation manners

[0028] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following will describe in detail the specific implementation manners of the present invention with reference to the drawings in the specification.

[0029] In the following description, many specific details are set forth to facilitate a thorough understanding of the present invention. However, the present invention may be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0030] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation manner of the present invention. The appearances of "in one embodiment" in different places in this specification do not all refer to the same embodiment, nor are they separate or alternative embodiments that exclude each other with other embodiments.

[0031] Furthermore, the present invention is described in detail with reference to the schematic diagrams. When describing the embodiments of the present invention in detail, for the convenience of explanation, the cross-sectional views showing the device structure will be enlarged locally out of the general proportion, and the schematic diagrams are only examples and should not limit the scope of protection of the present invention herein. In addition, in actual production, three-dimensional spatial dimensions including length, width, and depth should be included.

[0032] Embodiment 1

[0033] Referring to Figure 1-2 and Figure 7 , for the first embodiment of the present invention, a radial guiding device for the independent wheel 103 pair bogie of a low-floor train is provided. This device includes an installation unit 100, which includes a bogie body 101, two axle bridge devices 102 provided at both ends of the bogie body 101, and independent wheels 103 provided on both sides of the two axle bridge devices 102.

[0034] The bogie body 101 includes two side beams 101a horizontally arranged on both sides of the bogie body 101, end beams 101b arranged at both ends of the two side beams 101a, and a cross beam 101c arranged in the middle of the two side beams 101a. The two independent wheels 103 on both sides of the end beams 101b constitute an independent wheel 103 pair.

[0035] Among them, the two axle bridge devices 102 are respectively arranged on the inner sides of the two end beams 101b. The axle bridge device 102 includes two axle boxes 102a, an axle bridge body 102b arranged on the two axle boxes 102a, and a short axle 102c arranged between the axle box 102a and the independent wheel 103. The axle bridge body 102b is connected to the bogie body 101 through a primary suspension system and a frame.

[0036] The guide unit 200 includes two guide assemblies 201 arranged between the two axle bridge devices 102. The guide assembly 201 includes four connecting parts 201a arranged between the two axle bridge bodies 102b and the crossbeam 101c. The four connecting parts 201a are respectively close to the ends of the two axle bridge bodies 102b, and two coupling parts 201b are cross-arranged between the four connecting parts 201a.

[0037] The connecting part 201a includes a first support 201a-1 arranged on the axle bridge body 102b, a second support 201a-2 arranged on the crossbeam 101c, a pull rod 201a-3 and a connecting rod 201a-4 arranged between the first support 201a-1 and the second support 201a-2; the two ends of the pull rod 201a-3 are respectively connected to the first support 201a-1 and the connecting rod 201a-4 by ball hinges, and the middle end of the connecting rod 201a-4 is hinged to the second support 201a-2. The pull rod 201a-3 has a total of six degrees of freedom through the ball hinge connection, and the swing direction of the connecting rod 201a-4 is to swing back and forth at both ends.

[0038] The coupling portion 201b includes a third rod 201b-1 with bent ends, and fourth pin holes 201b-2 provided at both ends of the third rod 201b-1. The two fourth pin holes 201b-2 respectively cooperate with two connecting rods 201a-4 at the cross position.

[0039] During use, when the independent wheel 103 pairs are driving, the rotational torque generated by the gravity restoring force of the left and right wheels in the front is transmitted to the independent wheel 103 pairs at the rear through the pull rod 201a-3, the connecting rod 201a-4 and the third rod body 201b-1, thereby realizing the reverse shaking of the front and rear wheel pairs, improving the automatic centering ability of the low-floor train when running on straight sections and the automatic guidance ability when running on curved sections, reducing wheel-rail friction, and reducing the risk of vehicle derailment.

[0040] Example 2

[0041] Reference Figure 1-7 As the second embodiment of the present invention, the difference between this embodiment and the first embodiment is that: the first support 201a-1 includes a first seat body 201a-11 provided on the axle bridge body 102b, the first seat body 201a-11 is welded to the axle bridge body 102b, and a first ball joint mounting groove 201a-12 provided in the middle of the first seat body 201a-11;

[0042] The second support 201a-2 includes a second seat body 201a-21 provided on the cross beam 101c, the second seat body 201a-21 is welded to the cross beam 101c, a mounting groove 201a-22 provided in the middle of the second seat body 201a-21, and a first pin shaft hole 201a-23 provided on the second seat body 201a-21 and passing through the mounting groove 201a-22;

[0043] The tie rod 201a-3 includes a first rod body 201a-31 and ball joint shafts 201a-32 provided at both ends of the first rod body 201a-31. One of the ball joint shafts 201a-32 is engaged with the first ball joint mounting groove 201a-12 to mount one end of the first rod body 201a-31 on the first base, and the other ball joint shaft 201a-32 is engaged with the connecting rod 201a-4.

[0044] The connecting rod 201a-4 includes an arc-shaped second rod body 201a-41, a second ball joint mounting groove 201a-42 provided at one end of the second rod body 201a-41 and engaged with the ball joint shaft 201a-32, a second pin shaft hole 201a-43 provided at the other end of the second rod body 201a-41 and engaged with the third rod body 201b-1 in the coupling part 201b. The second pin shaft hole 201a-43 is engaged with the fourth pin shaft hole 201b-2, and the second rod body 201a-41 and the third rod body 201b-1 are hinge-connected by inserting a pin shaft between them. And a third pin shaft hole 201a-44 provided in the middle of the second rod body 201a-41 and engaged with the first pin shaft hole 201a-23. The first pin shaft hole 201a-23 is engaged with the third pin shaft hole 201a-44, and the second rod body 201a-41 and the second base are hinge-connected together by inserting a pin shaft between them;

[0045] The first rod body 201a-31 has six degrees of freedom at both ends through the ball joint shafts 201a-32 at both ends. The swinging direction of the second rod body 201a-41 is swinging left and right at the end, and the swinging direction of the third rod body 201b-1 is swinging left and right at the end.

[0046] The remaining structures are the same as those in Embodiment 1.

[0047] During use, when the independent wheel pair 103 is in motion, the turning moment generated by the gravity restoring force of the front left and right wheels during driving is transmitted to the independent wheel pair 103 at the rear through the first rod 201a-31, the second rod 201a-41, and the third rod 201b-1, realizing the reverse yaw of the front and rear wheel pairs, improving the automatic centering ability of the low-floor train during straight-line operation and the automatic guiding ability during curved-line operation, reducing wheel-rail friction, and lowering the risk of vehicle derailment.

[0048] Embodiment 3

[0049] Referring to Figure 1-7 , which is the third embodiment of the present invention. The difference between this embodiment and the second embodiment is that the two third rods 201b-1 are respectively located on both sides of the cross beam 101c, and the two third rods 201b-1 are located on the upper and lower sides of the cross beam 101c, so that the two third rods 201b-1 are staggered and have the same overall specification size, enabling standardized production.

[0050] The remaining structures are the same as those in Embodiment 2.

[0051] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not restrictive. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. An independent wheel pair bogie radial guiding device for a low-floor train, characterized in that: Comprising, An installation unit (100), including a bogie body (101), two axle bridge devices (102) provided at both ends of the bogie body (101), and independent wheels (103) provided on both sides of the two axle bridge devices (102); and, A guiding unit (200), including two guiding components (201) provided between the two axle bridge devices (102); The bogie body (101) includes two side beams (101a) arranged horizontally, end beams (101b) provided at both ends of the two side beams (101a), and a cross beam (101c) provided in the middle of the two side beams (101a). The two independent wheels (103) on both sides of the end beam (101b) form an independent wheel (103) pair; The two axle bridge devices (102) are respectively provided inside the two end beams (101b). The axle bridge device (102) includes two axle boxes (102a), an axle bridge body (102b) provided on the two axle boxes (102a), and a short axle (102c) provided between the axle box (102a) and the independent wheel (103); The guiding component (201) includes four connecting parts (201a) provided between the two axle bridge bodies (102b) and the cross beam (101c), and two coupling parts (201b) cross - arranged between the four connecting parts (201a); The connecting part (201a) includes a first support (201a - 1) provided on the axle bridge body (102b), a second support (201a - 2) provided on the cross beam (101c), a pull rod (201a - 3) and a connecting rod (201a - 4) provided between the first support (201a - 1) and the second support (201a - 2); both ends of the pull rod (201a - 3) are respectively connected to the first support (201a - 1) and the connecting rod (201a - 4), and the middle end of the connecting rod (201a - 4) is connected to the second support (201a - 2).

2. The independent wheel (103) of the low-floor train for the bogie radial guidance device according to claim 1, characterized in that: The first support (201a - 1) includes a first seat body (201a - 11) provided on the axle bridge body (102b), and a first spherical hinge mounting groove (201a - 12) provided in the middle of the first seat body (201a - 11); The pull rod (201a - 3) includes a first rod body (201a - 31), and spherical hinge shafts (201a - 3. The independent wheel (103) of the low-floor train for the bogie radial guiding device according to claim 2, characterized in that: The second support (201a-2) includes a second seat body (201a-21) disposed on the cross beam (101c), a mounting groove (201a-22) disposed in the middle of the second seat body (201a-21), and a first pin shaft hole (201a-23) disposed on the second seat body (201a-21) and passing through the mounting groove (201a-22).

4. The independent wheel (103) of the low-floor train for the bogie radial guiding device according to claim 3, characterized in that: The connecting rod (201a-4) includes a second rod body (201a-41) in an arc shape, a second ball hinge mounting groove (201a-42) disposed at one end of the second rod body (201a-41) and cooperating with the ball hinge shaft (201a-32), a second pin shaft hole (201a-43) disposed at the other end of the second rod body (201a-41) and cooperating with the coupling part (201b), and a third pin shaft hole (201a-44) disposed in the middle of the second rod body (201a-41) and cooperating with the first pin shaft hole (201a-23).

5. The radial guiding device for the bogie of the independent wheels (103) of the low-floor train according to any one of claims 1 to 4, characterized in that: The coupling part (201b) includes a third rod body (201b-1) bent at both ends, fourth pin shaft holes (201b-2) disposed at both ends of the third rod body (201b-1), and the two fourth pin shaft holes (201b-2) respectively cooperate with two connecting rods (201a-4) at the crossing positions.

6. The independent wheel (103) of the low-floor train for the bogie radial guiding device according to claim 5, characterized in that: The two third rod bodies (201b-1) are respectively located on both sides of the cross beam (101c).

Images