Trailer bogie and railway vehicle

Abstract

The invention relates to the technical field of railway vehicles, and provides a trailer bogie and a railway vehicle, and the trailer bogie comprises a framework and a wheel set system. The framework comprises a bearing body and two plate springs, a center pin channel is formed in the middle of the bearing body, two installation channels are formed in the bearing body in the longitudinal direction of the framework, and the two plate springs are installed in the two installation channels respectively. The wheel set system comprises a shaft core, a shaft sleeve and two wheels, the shaft core is rotationally installed in the shaft sleeve, the two wheels are installed at the two ends of the shaft sleeve through bearings respectively, the two wheels are connected with the two ends of the shaft core through flexible plates respectively, a brake mechanism is constructed on the shaft sleeve, and the brake mechanism is arranged on the shaft sleeve. And the brake mechanism is in transmission connection with the shaft core and is used for driving the shaft core to brake. And the bearing main body and the plate spring replace the original cross beam and side beam structure, so that the lightweight effect of the framework is obvious.

Description

Technical Field

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

[0002] Rail vehicles are widely used in daily travel, and lightweight design is a key research direction for rail vehicles. The current bogie frames all adopt the structure of crossbeams and side beams. This structure has reached saturation in weight optimization. Therefore, a new structure of bogie is urgently needed to further reduce the weight of rail vehicles. Summary of the invention

[0003] The present invention provides a trailer bogie, which is used to solve the technical problem in the prior art that the trailer bogie is difficult to optimize in weight, and realize the lightweight design of a rail vehicle.

[0004] The invention also provides a rail vehicle.

[0005] The present invention provides a trailer bogie, comprising:

[0006] The frame comprises a bearing body and two leaf springs, wherein a center pin channel is formed in the middle of the bearing body, and two mounting channels are formed in the bearing body along the longitudinal direction of the frame, and the two leaf springs are respectively mounted in the two mounting channels;

[0007] The wheelset system comprises an axle core, a sleeve and two wheels, wherein the axle core is rotatably mounted in the sleeve, the two wheels are respectively mounted at both ends of the sleeve through bearings, and the two wheels are respectively connected to the two ends of the axle core through flexible plates, a braking mechanism is constructed on the sleeve, and the braking mechanism is transmission-connected to the axle core for driving the axle core to brake.

[0008] According to a trailer bogie provided by the present invention, the load-bearing body comprises:

[0009] Two oppositely disposed C-shaped beams and two oppositely disposed wing-shaped beams disposed between the two C-shaped beams, the two wing-shaped beams are respectively configured with mounting channels, and the two C-shaped beams and the two wing-shaped beams are jointly enclosed to form the center pin channel;

[0010] The two C-shaped beams and the two wing-shaped beams are respectively integrally cast, and the two C-shaped beams and the two wing-shaped beams are suitable for being connected by welding; or the bearing body is integrally cast.

[0011] According to a trailer bogie provided by the present invention, the wing beam comprises:

[0012] A bottom beam, both ends of which are respectively welded to the ends of the two C-shaped beams, and a support is extended from the middle of the bottom beam in the direction away from the center pin channel;

[0013] A top beam, located between the two C-shaped beams, one end of the top beam is bent downward to form a bent portion, the bent portion is welded to the support, and the other end of the top beam extends in the lateral direction of the bearing body and is respectively welded to the two ends of the bottom beam through two connecting beams;

[0014] Wherein, the bottom beam, the top beam and the bent portion together enclose the installation channel.

[0015] According to a trailer bogie provided by the present invention, an anti-rolling load transfer beam is respectively provided below each of the C-shaped beams, and both ends of each of the anti-rolling load transfer beams are respectively connected to both ends of the C-shaped beam or the two bottom beams;

[0016] The lower surface of the bottom beam and the lower surface of the anti-roll load transfer beam are respectively integrally cast with load transfer ribs, each of which is distributed along the length direction of the bottom beam and the anti-roll load transfer beam, and each of the load transfer ribs is respectively connected to the bottom beam and the anti-roll load transfer beam in a T-shape;

[0017] The upper surface of each top beam is integrally cast with a reinforcing rib, each of the reinforcing ribs is distributed along the length direction of the top beam, and each of the reinforcing ribs is connected to the top beam in a T-shape.

[0018] According to a trailer bogie provided by the present invention, the load-bearing body comprises:

[0019] Two box beams are spaced apart and arranged in parallel, each of the box beams is hollow inside and forms a mounting channel;

[0020] Two load-bearing beams are respectively arranged on the sides of the two box beams facing each other;

[0021] Two inner vertical plates are arranged between the two box beams, the two inner vertical plates are bent in directions away from each other, and each inner vertical plate is welded to the two load-bearing beams to enclose and form a center pin channel;

[0022] Two external panels are arranged between the two box beams, and two sides of each external panel are respectively connected by welding to the two box beams;

[0023] Two bearing bottom plates are arranged between the two box beams, and each of the bearing bottom plates is respectively connected by welding to the two box beams, the inner vertical plate and the outer vertical plate;

[0024] The bearing top plate is located above the bearing top plate, and each of the box beams has an opening at the top. The bearing top plate extends to the top of the box beam and is welded to close the top opening. In addition, the bearing top plate is also welded to the bearing beam, the inner vertical plate and the outer vertical plate.

[0025] According to a trailer bogie provided by the present invention, two empty spring mounting seats are provided on the upper surface of the frame at intervals, and the two empty spring mounting seats are respectively located above the two mounting channels;

[0026] Wherein, the empty spring mounting seat is provided with a mounting protrusion which protrudes outward in the direction away from the mounting channel, and the distance between the two empty spring mounting seats is adapted to the distance between the two leaf springs.

[0027] According to a trailer bogie provided by the present invention, a leaf spring positioning portion is formed in the installation channel, a connecting block is provided on the upper surface of the leaf spring, one of the leaf spring positioning portion and the connecting block is configured with an inwardly concave installation groove, and the other of the leaf spring positioning portion and the connecting block is configured with an outwardly convex protrusion, the protrusion is suitable for being snapped into the installation groove, and the protrusion and the installation groove are respectively configured to be matched cross shapes.

[0028] According to a trailer bogie provided by the present invention, the leaf spring comprises:

[0029] A carbon fiber top plate extending in the longitudinal direction of the frame, wherein the carbon fiber top plate is arranged in an arc shape;

[0030] A carbon fiber bottom plate extending in the longitudinal direction of the frame, the carbon fiber bottom plate being arranged in an arc shape, the carbon fiber bottom plate being located below the carbon fiber top plate, and the bending directions of the carbon fiber bottom plate and the carbon fiber top plate are facing the same side, the curvature of the carbon fiber bottom plate is greater than the curvature of the carbon fiber top plate, and the thickness of the carbon fiber bottom plate is less than the thickness of the carbon fiber top plate;

[0031] A plurality of carbon fiber vertical plates are vertically and side by side arranged between the carbon fiber top plate and the carbon fiber bottom plate, and the plurality of carbon fiber vertical plates are sequentially attached to each other;

[0032] The carbon fibers of the carbon fiber top plate and the carbon fiber bottom plate are arranged unidirectionally in the longitudinal direction, the carbon fibers of the carbon fiber vertical plate are arranged bidirectionally and crosswise, and the angle between the carbon fiber direction of the carbon fiber vertical plate and the horizontal plane is 45 degrees.

[0033] According to a trailer bogie provided by the present invention, the braking mechanism comprises:

[0034] A shell connected to the shaft sleeve, wherein the inner surface of the shell is provided with guide ribs along the axial direction of the shaft sleeve;

[0035] A rotating member is rotatably disposed in the housing, and the rotating member is connected to the shaft core, and a limiting rib is disposed on the outer surface of the rotating member along the axial direction of the shaft core;

[0036] A moving plate and a static plate are arranged in the housing, the moving plate and the static plate are sleeved on the rotating member at intervals, the inner circumference of the moving plate is provided with a limit slot, the limit slot is clamped on the limit rib, and the outer circumference of the static plate is provided with a positioning groove, the positioning groove is clamped on the guide rib;

[0037] A driving member is disposed in the housing, the driving member is adapted to be connected to the static plate, and the driving member is adapted to drive the static plate to slide along the guide ribs so that the static plate and the dynamic plate are fitted to each other to form a brake.

[0038] According to a trailer bogie provided by the present invention, a partition is formed in the shell, and the partition is suitable for dividing the interior of the shell into two braking areas, and each of the braking areas is respectively provided with the moving plate, the static plate and the driving member.

[0039] According to a trailer bogie provided by the present invention, both ends of the shell are suitable for being closed by end covers, and the end covers are connected to the shaft sleeves, wherein the end covers are provided with weight-reducing and heat-dissipating openings.

[0040] According to a trailer bogie provided by the present invention, the axle sleeve is suitable for being connected to the load-bearing body through a fin plate, and along the direction from the axle sleeve to the load-bearing body, the width of the fin plate gradually decreases, and the thickness of the fin plate gradually increases.

[0041] The present invention also provides a rail vehicle, comprising a center pin, a car body and a trailer bogie as described above, wherein the trailer bogie is connected to the car body via an empty spring, and the center pin passes through the center pin channel and is connected to the car body via a traction rod.

[0042] The trailer bogie provided by the embodiment of the present invention replaces the original crossbeam and side beam structure with a load-bearing body and a leaf spring. The structure of the load-bearing body is simple, and the structural form of the leaf spring also makes the weight of the leaf spring much smaller than the weight of the traditional side beam, so that the lightweight effect of the frame is obvious. The driving parts on the wheelset system are used to directly brake the wheelset, which saves layout space. Compared with the original caliper braking, the weight of the braking mechanism can be greatly reduced, which is conducive to the lightweight development of rail vehicles.

[0043] The rail vehicle provided by the embodiment of the present invention has a trailer bogie connected to the car body through an empty spring, a center pin passing through the center pin channel and connected to the car body through a traction rod, and a load-bearing body and a leaf spring are used to replace the original crossbeam and side beam structure. The structure of the load-bearing body is simple, and the structural form of the leaf spring also makes the weight of the leaf spring much smaller than the weight of the traditional side beam, so that the frame lightweight effect is obvious, and the driving parts on the wheelset system are used to directly brake the wheelset, which saves layout space. Compared with the original brake caliper braking, the weight of the braking mechanism can be greatly reduced, which is conducive to the lightweight development of rail vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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.

[0045] Figure 1 It is a schematic diagram of the three-dimensional structure of the trailer bogie provided by the present invention;

[0046] Figure 2 It is one of the three-dimensional structural schematic diagrams of the framework provided by the present invention;

[0047] Figure 3 This is the second schematic diagram of the three-dimensional structure of the framework provided by the present invention;

[0048] Figure 4 This is the third schematic diagram of the three-dimensional structure of the framework provided by the present invention;

[0049] Figure 5 It is a partial structural schematic diagram of the framework provided by the present invention;

[0050] Figure 6 This is the fourth schematic diagram of the three-dimensional structure of the framework provided by the present invention;

[0051] Figure 7 This is the fifth schematic diagram of the three-dimensional structure of the framework provided by the present invention;

[0052] Figure 8 It is a schematic diagram of the three-dimensional structure of the leaf spring provided by the present invention;

[0053] Fig. 9 It is a schematic diagram of the exploded structure of the wheelset system provided by the present invention;

[0054] Fig.10 It is a schematic diagram of the three-dimensional structure of the moving disk provided by the present invention;

[0055] Fig.11 It is a schematic diagram of the three-dimensional structure of the static disk plate provided by the present invention.

[0056] Reference numerals:

[0057] 100, frame; 200, load-bearing body; 210, center pin channel; 220, installation channel; 230, C-shaped beam; 240, wing beam; 2410, bottom beam; 2420, support; 2430, top beam; 2440, bending portion; 2450, connecting beam; 2460, anti-roll load transfer beam; 2470, load transfer rib; 2480, reinforcing rib; 2510, box beam; 2520, load-bearing beam; 2530, inner vertical plate; 2540, outer vertical plate; 2550, load-bearing bottom plate; 2560, load-bearing top plate; 300, leaf spring; 310, pad; 320, connecting block; 330, installation groove; 340, Carbon fiber top plate; 350, carbon fiber bottom plate; 360, carbon fiber vertical plate; 400, wheelset system; 410, shaft core; 420, shaft sleeve; 430, wheel; 440, flexible plate; 500, air spring mounting seat; 510, mounting protrusion; 600, leaf spring positioning part; 610, protrusion; 800, brake mechanism; 810, housing; 820, rotating part; 830, moving plate; 840, stationary plate; 850, driving part; 860, guide rib; 870, limiting rib; 880, limiting slot; 890, positioning slot; 8100, partition; 8110, end cover; 8120, weight reduction and heat dissipation vent; 8130, fin plate. DETAILED DESCRIPTION

[0058] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] Combine the following Figure 1-Figure 11 Embodiments of the present invention are described.

[0064] The present embodiment provides a trailer bogie, comprising a frame 100 and a wheel set system 400. The frame 100 comprises a load-bearing body 200 and two leaf springs 300. A center pin channel 210 is formed in the middle of the load-bearing body 200. The load-bearing body 200 is formed with two mounting channels 220 along the longitudinal direction of the frame 100. The two leaf springs 300 are respectively mounted on the two mounting channels 220. The wheel set system 400 comprises an axle core 410, a sleeve 420 and two wheels 430. The axle core 410 is rotatably mounted in the sleeve 420. The two wheels 430 are respectively mounted on the two ends of the sleeve 420 through bearings, and the two wheels 430 are respectively connected to the two ends of the axle core 410 through flexible plates 440. A brake mechanism 800 is constructed on the sleeve 420. The brake mechanism 800 is transmission-connected to the axle core 410 and is used to drive the axle core 410 to brake.

[0065] In this embodiment, the original cross beam and side beam structure are replaced by the load-bearing body 200 and the leaf spring 300. The structure of the load-bearing body 200 is simple, and the structural form of the leaf spring 300 also makes the weight of the leaf spring 300 much smaller than the weight of the traditional side beam, so that the frame 100 is significantly lightweight. The driving parts on the wheelset system 400 are used to directly brake the wheelset, which saves layout space. Compared with the original caliper braking, the weight of the braking mechanism 800 can be greatly reduced, which is conducive to the lightweight development of rail vehicles.

[0066] During the braking process, the braking mechanism 800 is used to suppress the rotation of the output shaft of the motor, thereby braking the rotation of the shaft core 410 , so as to brake the wheel 430 through the transmission of the shaft core 410 and the flexible plate 440 .

[0067] According to a trailer bogie provided by the present invention, the load-bearing body 200 includes two C-shaped beams 230 arranged opposite to each other and two wing-shaped beams 240 arranged opposite to each other between the two C-shaped beams 230, the two wing-shaped beams 240 are respectively configured with installation channels 220, and the two C-shaped beams 230 and the two wing-shaped beams 240 are jointly enclosed to form a center pin channel 210. The two C-shaped beams 230 and the two wing-shaped beams 240 are respectively integrally cast, and the two C-shaped beams 230 and the two wing-shaped beams 240 are suitable for being connected by welding; or the load-bearing body 200 is integrally cast.

[0068] In this embodiment, the original cross beam and side beam structure are replaced by the load-bearing body 200 and the leaf spring 300, and the load-bearing body 200 is integrally cast using high-strength casting materials, so that the load-bearing body 200 can be quickly formed and can achieve a high strength-to-weight ratio, while also avoiding the occurrence of welding defects in the frame 100. The structure of the load-bearing body 200 is simple, and the structural form of the leaf spring 300 also makes the weight of the leaf spring 300 much less than the weight of the traditional side beam, making the frame 100 significantly lightweight.

[0069] The structures of the C-shaped beam 230 and the wing-shaped beam 240 can be designed based on the load transfer conditions of the frame 100, and the structures of the C-shaped beam 230 and the wing-shaped beam 240 can be topologically optimized based on the load conditions at each position, so that the C-shaped beam 230 and the wing-shaped beam 240 not only have good load-bearing performance, but also have the advantages of simple structure and less consumables, so as to achieve a lightweight design of the frame 100.

[0070] The vertical load on the frame 100 is mainly borne by the two leaf springs 300 , and the lateral load and the longitudinal load are borne and transmitted by the load-bearing body 200 .

[0071] The wing-shaped beam 240 includes a bottom beam 2410 and a top beam 2430. The two ends of the bottom beam 2410 are respectively welded to the ends of the two C-shaped beams 230, and a support 2420 extends from the middle of the bottom beam 2410 in the direction away from the center pin channel 210. The top beam 2430 is located between the two C-shaped beams 230, and one end of the top beam 2430 is bent downward to form a bent portion 2440, and the bent portion 2440 is welded to the support 2420. The other end of the top beam 2430 extends in the lateral direction of the bearing body 200 and is respectively welded to the two ends of the bottom beam 2410 through two connecting beams 2450. Among them, the bottom beam 2410, the top beam 2430 and the bent portion 2440 together enclose the installation channel 220.

[0072] The bottom beam 2410 is located below the top beam 2430. The bottom beam 2410 is arranged along the longitudinal direction of the load-bearing body 200, and the top beam 2430 is arranged along the transverse direction of the load-bearing body 200, that is, the top beam 2430 and the bottom beam 2410 are perpendicular to each other in space. One end of the top beam 2430 is bent vertically downward to form a bending portion 2440, and the bending portion is connected by an arc transition. The bending portion 2440 is connected to the support 2420 in the middle of the bottom beam 2410, so that one end of the top beam 2430 is connected to the middle of the bottom beam 2410 to form a whole. The other end of the top beam 2430 is connected to the two ends of the bottom beam 2410 through two connecting beams 2450, so that the other end of the top beam 2430 is connected to the two ends of the bottom beam 2410 to form a whole.

[0073] The thickness of the connector gradually increases along the direction from one end of the top beam 2430 away from the bent portion 2440 to the end of the bottom beam 2410 to meet the load-bearing requirements. The shape of the connector is generally set to be an arc, and along the direction from one end of the top beam 2430 away from the bent portion 2440 to the end of the bottom beam 2410, the connector is slightly bent toward the center pin channel 210.

[0074] After the connecting member connects the ends of the top beam 2430 and the bottom beam 2410, the L-shaped top beam 2430 can enclose the middle part of the bottom beam 2410 to form the aforementioned installation channel 220, so as to be used to connect the leaf spring 300. The height of the enclosed installation channel 220 is just adapted to the maximum height of the leaf spring 300, so that the middle part of the leaf spring 300 is fixed in the installation channel 220, and the width of the enclosed installation channel 220 matches the width of the leaf spring 300, so that the leaf spring 300 can be inserted into the installation channel 220.

[0075] One end of each bottom beam 2410 extends in a direction away from the C-shaped beam 230 and forms a wing plate, and an anti-roll torsion bar seat is configured at the end of the wing plate. The anti-roll torsion bar seat is used to install the anti-roll torsion bar to achieve the anti-roll of the frame 100. The provision of the wing plate allows the anti-roll torsion bar seat to achieve the required installation position requirements.

[0076] Both anti-roll load transfer beams 2460 are bent. The anti-roll load transfer beam 2460 close to the wing plate is bent toward the C-shaped beam 230, and the anti-roll load transfer beam 2460 away from the wing plate is bent away from the C-shaped beam 230, so that each anti-roll load transfer beam 2460 can meet its own load transfer requirements.

[0077] An anti-rolling load transfer beam 2460 is provided below each C-shaped beam 230, and the two ends of each anti-rolling load transfer beam 2460 are connected to the two ends of the C-shaped beam 230 or the two bottom beams 2410. Load transfer ribs 2470 are integrally cast on the lower surface of the bottom beam 2410 and the lower surface of the anti-rolling load transfer beam 2460, respectively. Each load transfer rib 2470 is distributed along the length direction of the bottom beam 2410 and the anti-rolling load transfer beam 2460, and each load transfer rib 2470 is connected to the bottom beam 2410 and the anti-rolling load transfer beam 2460 in a T-shape. Reinforcement ribs 2480 are integrally cast on the upper surface of each top beam 2430, respectively. Each reinforcement rib 2480 is distributed along the length direction of the top beam 2430, and each reinforcement rib 2480 is connected to the top beam 2430 in a T-shape.

[0078] The load transfer ribs 2470 can assist the bottom beam 2410 and the anti-roll load transfer beam 2460 in transferring loads, and can improve the structural strength and fatigue strength of the bottom beam 2410 and the anti-roll load transfer beam 2460, and further ensure that the bottom beam 2410 and the anti-roll load transfer beam 2460 meet the load transfer requirements. Each load transfer rib 2470 is connected to the bottom beam 2410 and the anti-roll load transfer beam 2460 in a T-shape, so that the structure formed by the load transfer rib 2470, the bottom beam 2410 and the anti-roll load transfer beam 2460 is more stable, and at the same time meets the lightweight design requirements.

[0079] The reinforcing ribs 2480 can assist the top beam 2430 in transferring the load, and can improve the structural strength and fatigue strength of the top beam 2430, further ensuring that the top beam 2430 meets the load transfer requirements. Each reinforcing rib 2480 is connected to the top beam 2430 in a T-shape, so that the structure formed by the reinforcing ribs 2480 and the top beam 2430 is more stable, while meeting the lightweight design requirements.

[0080] In another embodiment, the bearing body 200 includes two box beams 2510, two load-bearing beams 2520, two inner vertical plates 2530, two outer vertical plates 2540, two load-bearing bottom plates 2550 and a load-bearing top plate 2560. The two box beams 2510 are spaced apart and arranged in parallel, and each box beam 2510 is hollow inside and forms a mounting channel 220. The two load-bearing beams 2520 are respectively arranged on the sides of the two box beams 2510 facing each other. The two inner vertical plates 2530 are arranged between the two box beams 2510, and the two inner vertical plates 2530 are respectively bent in directions away from each other, and each inner vertical plate 2530 is respectively welded to the two load-bearing beams 2520 to enclose and form a center pin channel 210. The two outer vertical plates 2540 are arranged between the two box beams 2510, and the two sides of each outer vertical plate 2540 are respectively welded to the two box beams 2510. Two bearing bottom plates 2550 are disposed between two box beams 2510, and each bearing bottom plate 2550 is respectively welded to the two box beams 2510, the inner vertical plate 2530 and the outer vertical plate 2540. The bearing top plate 2560 is located above the bearing top plate 2560, and each box beam 2510 is respectively opened at the top. The bearing top plate 2560 extends to the top of the box beam 2510 and is welded to close the top opening, and the bearing top plate 2560 is also welded to the bearing beam 2520, the inner vertical plate 2530 and the outer vertical plate 2540.

[0081] The main bearing structure is formed by a box beam 2510, a load-bearing beam 2520, an inner vertical plate 2530, an outer vertical plate 2540, a load-bearing bottom plate 2550 and a load-bearing top plate 2560. The main bearing structure and the leaf spring 300 replace the original structure of the cross beam and the side beam. The main bearing structure is formed by welding, and has the characteristics of simple structure, high strength, and easy forming. The structural form of the leaf spring 300 also makes the weight of the leaf spring 300 much less than the weight of the traditional side beam, so that the frame 100 has a significant lightweight effect.

[0082] The box beam 2510, the load-bearing beam 2520, the inner vertical plate 2530, the outer vertical plate 2540, the load-bearing bottom plate 2550 and the load-bearing top plate 2560 are welded and formed, so that the shapes of the box beam 2510, the load-bearing beam 2520, the inner vertical plate 2530, the outer vertical plate 2540, the load-bearing bottom plate 2550 and the load-bearing top plate 2560 can be independently processed and structurally designed, and the plate thickness, beam width, etc. of the box beam 2510, the load-bearing beam 2520, the inner vertical plate 2530, the outer vertical plate 2540, the load-bearing bottom plate 2550 and the load-bearing top plate 2560 can be reasonably planned based on their respective load-bearing requirements, so as to meet the requirements of lightweight design while ensuring that the strength requirements are met. After the box beam 2510, the load-bearing beam 2520, the inner vertical plate 2530, the outer vertical plate 2540, the load-bearing bottom plate 2550 and the load-bearing top plate 2560 are processed respectively, they are welded by a welding mechanism to form a main load-bearing structure.

[0083] The box beam 2510 is a hollow structure. The box beam 2510 has a mounting channel 220 disposed longitudinally therein, so that the leaf spring 300 can be installed in the mounting channel 220 and arranged longitudinally along the box beam 2510, thereby enabling the leaf spring 300 to replace the original side beam structure. The leaf spring 300 is made of carbon fiber material, which has the advantages of high strength, light weight, and easy processing, thereby meeting the lightweight design requirements of the frame 100.

[0084] Each load-bearing beam 2520 includes two beam bodies distributed in an eight-shaped shape, and the two beam bodies are close to each other along the direction from the box beam 2510 to the center pin channel 210. The inner vertical plate 2530 and the outer vertical plate 2540 are respectively on the inner side and the outer side, so that the inner side and the outer side of the load-bearing bottom plate 2550 and the load-bearing top plate 2560 are respectively in a closed state, and the inner vertical plate 2530 and the outer vertical plate 2540 can also play a load-bearing effect. The inner vertical plate 2530 and the outer vertical plate 2540 are both arranged in an arc shape, and the two inner vertical plates 2530 are bent in directions away from each other, and the two outer vertical plates 2540 are also bent in directions away from the inner vertical plates 2530, so that the shape design of the inner vertical plate 2530 and the outer vertical plate 2540 is performed respectively, so that the frame 100 is more beautiful while achieving a lightweight design and meeting the load-bearing requirements.

[0085] Two empty spring mounting seats 500 are arranged at intervals on the upper surface of the frame 100, and the two empty spring mounting seats 500 are respectively located above the two mounting channels 220. The empty spring mounting seats 500 are provided with mounting protrusions 510 protruding outwards in the direction away from the mounting channels 220, and the spacing between the two empty spring mounting seats 500 is adapted to the spacing between the two leaf springs 300.

[0086] The empty spring mounting seat 500 is used to connect the empty spring. The empty spring mounting seat 500 is provided with a mounting protrusion 510 that protrudes outward in the direction opposite to the leaf spring 300. The empty spring is provided with a groove corresponding to the mounting protrusion 510. When installing the empty spring, the groove of the empty spring is aligned with the mounting protrusion 510 to achieve the positioning installation of the empty spring. Compared with the traditional method of inserting the empty spring into the mounting seat, the empty spring will not be inserted into the installation channel 220 in the above method, so that the empty spring is prevented from damaging the leaf spring 300 in the installation channel 220.

[0087] The distance between the two empty spring mounting seats 500 is adapted to the distance between the two leaf springs 300 . Specifically, the distance between the two empty spring mounting seats 500 is the same as the distance between the two leaf springs 300 to avoid generating additional torque on the leaf springs 300 .

[0088] A positioning portion of the leaf spring 300 is formed in the mounting channel 220, and a connecting block 320 is provided on the upper surface of the leaf spring 300. One of the positioning portion of the leaf spring 300 and the connecting block 320 is configured with an inwardly concave mounting groove 330, and the other of the positioning portion of the leaf spring 300 and the connecting block 320 is configured with an outwardly convex protrusion 610. The protrusion 610 is suitable for being snapped into the mounting groove 330, and the protrusion 610 and the mounting groove 330 are respectively configured to be matched cross shapes.

[0089] The mounting portion of the leaf spring 300 and the mounting groove 330 on the connecting block 320 cooperate with the protrusion 610 to achieve the positioning and installation of the leaf spring 300. The protrusion 610 and the mounting groove 330 are respectively arranged in a matching cross shape to achieve the longitudinal and transverse limiting functions of the leaf spring 300. Specifically, the mounting portion of the leaf spring 300 is configured with a cross-shaped protrusion 610, and the connecting block 320 is configured with a cross-shaped mounting groove 330.

[0090] The leaf spring 300 includes a carbon fiber top plate 340, a carbon fiber bottom plate 350 and a plurality of carbon fiber vertical plates 360. The carbon fiber top plate 340 extends in the longitudinal direction of the frame 100, and the carbon fiber top plate 340 is arranged in an arc shape. The carbon fiber bottom plate 350 extends in the longitudinal direction of the frame 100, and the carbon fiber bottom plate 350 is arranged in an arc shape. The carbon fiber bottom plate 350 is located below the carbon fiber top plate 340, and the bending directions of the carbon fiber bottom plate 350 and the carbon fiber top plate 340 face the same side, the curvature of the carbon fiber bottom plate 350 is greater than the curvature of the carbon fiber top plate 340, and the thickness of the carbon fiber bottom plate 350 is less than the thickness of the carbon fiber top plate 340. A plurality of carbon fiber vertical plates 360 are arranged vertically and side by side between the carbon fiber top plate 340 and the carbon fiber bottom plate 350, and the plurality of carbon fiber vertical plates 360 are attached to each other in sequence. The carbon fibers of the carbon fiber top plate 340 and the carbon fiber bottom plate 350 are arranged unidirectionally in the longitudinal direction, the carbon fibers of the carbon fiber vertical plate 360 ​​are arranged bidirectionally and crosswise, and the angle between the carbon fiber direction of the carbon fiber vertical plate 360 ​​and the horizontal plane is 45 degrees.

[0091] The carbon fiber top plate 340, the carbon fiber bottom plate 350 and the plurality of carbon fiber vertical plates 360 constitute the carbon fiber leaf spring 300, so that the leaf spring 300 is light in weight, which is beneficial to the lightweight of the frame 100. The curved carbon fiber top plate 340 and the curved carbon fiber bottom plate 350 are both beneficial to the load-bearing of the leaf spring 300. The bending directions of the carbon fiber bottom plate 350 and the carbon fiber top plate 340 face the same side, and the curvature of the carbon fiber bottom plate 350 is greater than that of the carbon fiber top plate 340, so that the upper carbon fiber top plate 340 can resist pressure, and the lower carbon fiber bottom plate 350 can resist pressure.

[0092] The thickness of the carbon fiber bottom plate 350 is smaller than that of the carbon fiber top plate 340 , so that the upper carbon fiber top plate 340 can resist pressure and the lower carbon fiber bottom plate 350 can resist pressure.

[0093] A plurality of carbon fiber vertical plates 360 are vertically and side by side arranged between the carbon fiber top plate 340 and the carbon fiber bottom plate 350, and the plurality of carbon fiber vertical plates 360 are attached to each other in sequence. The number of carbon fiber vertical plates 360 can be selected based on the actual stiffness requirements. In this embodiment, the number of carbon fiber vertical plates 360 is set to 10.

[0094] The carbon fibers of the carbon fiber top plate 340 and the carbon fiber bottom plate 350 are arranged unidirectionally in the longitudinal direction, and the carbon fibers of the carbon fiber vertical plate 360 ​​are arranged bidirectionally and crosswise, and the angle between the carbon fiber direction of the carbon fiber vertical plate 360 ​​and the horizontal plane is 45 degrees. Based on its unique carbon fiber arrangement, the strength design and lightweight design of the leaf spring 300 are ensured.

[0095] The upper surface of the pad 310 is matched with the lower surface of the carbon fiber bottom plate 350, and hooks are extended upward on both sides of each pad 310, which are suitable for being hung on the upper surface of the carbon fiber top plate 340. The pad 310 is fixed by the hook hanging method, and the longitudinal force and lateral force of the pad 310 can be not constrained. Specifically, the pad 310 is a rubber block.

[0096] In this embodiment, the brake mechanism 800 includes a housing 810, a rotating member 820, a moving disc 830, a static disc 840 and a driving member 850. The housing 810 is connected to the shaft sleeve 420, and the inner surface of the housing 810 is provided with a guide rib 860 along the axial direction of the shaft sleeve 420. The rotating member 820 is rotatably arranged in the housing 810, and the rotating member 820 is connected to the shaft core 410, and the outer surface of the rotating member 820 is provided with a limiting rib 870 along the axial direction of the shaft core 410. The moving disc 830 and the static disc 840 are arranged in the housing 810, and the moving disc 830 and the static disc 840 are sleeved on the rotating member 820 at intervals, and the inner circumference of the moving disc 830 is provided with a limiting groove 880, and the limiting groove 880 is clamped to the limiting rib 870, and the outer circumference of the static disc 840 is provided with a positioning groove 890, and the positioning groove 890 is clamped to the guide rib 860. The driving member 850 is disposed in the housing 810 and is suitable for being connected to the static plate 840 . The driving member 850 is suitable for driving the static plate 840 to slide along the guide ribs 860 so that the static plate 840 and the dynamic plate 830 fit together to form a brake.

[0097] During the braking process, the driving member 850 will push the moving disc 830 and the static disc 840 to approach each other, and the static disc 840 will slide axially under the limiting action of the positioning groove 890 and the guide rib 860, and the moving disc 830 will slide axially under the limiting action of the limiting slot 880 and the limiting rib 870, and the axial sliding of the moving disc 830 and the static disc 840 will make the moving disc 830 and the static disc 840 close to each other, thereby forming a braking force on the moving disc 830 to stop the moving disc 830 from rotating. When the moving disc 830 gradually stops rotating, the moving disc 830 can drive the output shaft of the motor to stop rotating, and the wheel 430 is braked through the transmission action of the driving teeth, the driven teeth, the shaft core 410 and the flexible plate 440.

[0098] A partition 8100 is formed in the housing 810, and the partition 8100 is suitable for dividing the interior of the housing 810 into two braking areas, each of which is provided with a moving disc 830, a static disc 840 and a driving member 850. Two sets of moving discs 830, two sets of static discs 840 and two sets of driving members 850 are respectively provided in the two braking areas, further improving the braking effect.

[0099] Both ends of the shell 810 are suitable for being closed by end covers 8110, and the end covers 8110 are connected to the shaft sleeve 420, wherein the end covers 8110 are provided with weight-reducing and heat-dissipating vents 8120, and the end covers 8110 are used to seal both ends of the shell 810 to ensure the safety of the transmission. The design of the weight-reducing and heat-dissipating vents 8120 can facilitate weight reduction and heat dissipation, and is beneficial to the transmission of vertical force.

[0100] The shaft sleeve 420 is suitable for being connected to the bearing body 200 through the fin plate 8130. Along the direction from the shaft sleeve 420 to the bearing body 200, the width of the fin plate 8130 gradually decreases, and the thickness of the fin plate 8130 gradually increases. The fin plate 8130 is used to replace the original first-order tie rod for positioning. One end of the fin plate 8130 is provided with three positioning screw holes for connecting with the shaft sleeve 420, and the other end of the fin plate 8130 is provided with two screw holes for bearing the body 200. The structure of the fin plate 8130 can achieve a balance of large torque. The fin plate 8130 close to one side of the bearing body 200 can be connected to the bearing body 200 by two bolts. While achieving positioning, it can also bear the input of lateral force, and finally achieve the purpose of low vertical stiffness and large lateral stiffness in one piece.

[0101] On the other hand, the present invention also provides a rail vehicle, including a center pin, a car body and a trailer bogie as described in the above embodiment, wherein the trailer bogie is connected to the car body via an empty spring, and the center pin passes through the center pin channel 210 and is connected to the car body via a traction rod.

[0102] In this embodiment, the trailer bogie is connected to the car body through an empty spring, the center pin passes through the center pin channel 210 and is connected to the car body through a traction rod, and the load-bearing body 200 and the leaf spring 300 are used to replace the original crossbeam and side beam structure. The structure of the load-bearing body 200 is simple, and the structural form of the leaf spring 300 also makes the weight of the leaf spring 300 much smaller than the weight of the traditional side beam, so that the frame 100 has a significant lightweight effect. The driving member 850 on the wheelset system 400 is used to directly brake the wheelset, which saves layout space. Compared with the original brake caliper braking, the weight of the braking mechanism 800 can be greatly reduced, which is conducive to the lightweight development of rail vehicles.

[0103] 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 trailer bogie, characterized in that: include: The frame comprises a bearing body and two leaf springs, wherein a center pin channel is formed in the middle of the bearing body, and two mounting channels are formed in the bearing body along the longitudinal direction of the frame, and the two leaf springs are respectively mounted in the two mounting channels; The wheelset system comprises an axle core, a sleeve and two wheels, wherein the axle core is rotatably mounted in the sleeve, the two wheels are respectively mounted at both ends of the sleeve through bearings, and the two wheels are respectively connected to the two ends of the axle core through flexible plates, a braking mechanism is constructed on the sleeve, and the braking mechanism is transmission-connected to the axle core for driving the axle core to brake.

2. The trailer bogie according to claim 1, characterized in that: The bearing body comprises: Two oppositely disposed C-shaped beams and two oppositely disposed wing-shaped beams disposed between the two C-shaped beams, the two wing-shaped beams are respectively configured with mounting channels, and the two C-shaped beams and the two wing-shaped beams are jointly enclosed to form the center pin channel; The two C-shaped beams and the two wing-shaped beams are respectively integrally cast, and the two C-shaped beams and the two wing-shaped beams are suitable for being connected by welding; or the bearing body is integrally cast.

3. The trailer bogie according to claim 2, characterized in that: The wing beam comprises: A bottom beam, both ends of which are respectively welded to the ends of the two C-shaped beams, and a support is extended from the middle of the bottom beam in the direction away from the center pin channel; A top beam, located between the two C-shaped beams, one end of the top beam is bent downward to form a bent portion, the bent portion is welded to the support, and the other end of the top beam extends in the lateral direction of the bearing body and is respectively welded to the two ends of the bottom beam through two connecting beams; Wherein, the bottom beam, the top beam and the bent portion together enclose the installation channel.

4. The trailer bogie according to claim 3, characterized in that: An anti-rolling load transfer beam is provided below each of the C-shaped beams, and two ends of each of the anti-rolling load transfer beams are connected to two ends of the C-shaped beam or the two bottom beams respectively; The lower surface of the bottom beam and the lower surface of the anti-roll load transfer beam are respectively integrally cast with load transfer ribs, each of which is distributed along the length direction of the bottom beam and the anti-roll load transfer beam, and each of the load transfer ribs is respectively connected to the bottom beam and the anti-roll load transfer beam in a T-shape; The upper surface of each top beam is integrally cast with a reinforcing rib, each of the reinforcing ribs is distributed along the length direction of the top beam, and each of the reinforcing ribs is connected to the top beam in a T-shape.

5. The trailer bogie according to claim 1, characterized in that: The bearing body comprises: Two box beams are spaced apart and arranged in parallel, each of the box beams is hollow inside and forms a mounting channel; Two load-bearing beams are respectively arranged on the sides of the two box beams facing each other; Two inner vertical plates are arranged between the two box beams, the two inner vertical plates are bent in directions away from each other, and each inner vertical plate is welded to the two load-bearing beams to enclose and form a center pin channel; Two external panels are arranged between the two box beams, and two sides of each external panel are respectively connected by welding to the two box beams; Two bearing bottom plates are arranged between the two box beams, and each bearing bottom plate is respectively connected by welding with the two box beams, the inner vertical plate and the outer vertical plate; The bearing top plate is located above the bearing top plate, and each of the box beams has an opening at the top. The bearing top plate extends to the top of the box beam and is welded to close the top opening. In addition, the bearing top plate is also welded to the bearing beam, the inner vertical plate and the outer vertical plate.

6. The trailer bogie according to any one of claims 1 to 5, characterized in that: Two empty spring mounting seats are arranged at intervals on the upper surface of the frame, and the two empty spring mounting seats are respectively located above the two mounting channels; Wherein, the empty spring mounting seat is provided with a mounting protrusion which protrudes outward in the direction away from the mounting channel, and the distance between the two empty spring mounting seats is adapted to the distance between the two leaf springs.

7. The trailer bogie according to any one of claims 1 to 5, characterized in that: A leaf spring positioning portion is formed in the mounting channel, a connecting block is provided on the upper surface of the leaf spring, one of the leaf spring positioning portion and the connecting block is configured with an inwardly concave mounting groove, and the other of the leaf spring positioning portion and the connecting block is configured with an outwardly convex protrusion, the protrusion is suitable for being snapped into the mounting groove, and the protrusion and the mounting groove are respectively configured to be matching cross shapes.

8. The trailer bogie according to any one of claims 1 to 5, characterized in that: The leaf spring comprises: A carbon fiber top plate extending in the longitudinal direction of the frame, wherein the carbon fiber top plate is arranged in an arc shape; A carbon fiber bottom plate extending in the longitudinal direction of the frame, the carbon fiber bottom plate being arranged in an arc shape, the carbon fiber bottom plate being located below the carbon fiber top plate, and the bending directions of the carbon fiber bottom plate and the carbon fiber top plate are facing the same side, the curvature of the carbon fiber bottom plate is greater than the curvature of the carbon fiber top plate, and the thickness of the carbon fiber bottom plate is less than the thickness of the carbon fiber top plate; A plurality of carbon fiber vertical plates are vertically and side by side arranged between the carbon fiber top plate and the carbon fiber bottom plate, and the plurality of carbon fiber vertical plates are sequentially attached to each other; The carbon fibers of the carbon fiber top plate and the carbon fiber bottom plate are arranged unidirectionally in the longitudinal direction, the carbon fibers of the carbon fiber vertical plate are arranged bidirectionally and crosswise, and the angle between the carbon fiber direction of the carbon fiber vertical plate and the horizontal plane is 45 degrees.

9. The trailer bogie according to any one of claims 1 to 5, characterized in that: The braking mechanism comprises: A shell connected to the shaft sleeve, wherein the inner surface of the shell is provided with guide ribs along the axial direction of the shaft sleeve; A rotating member is rotatably disposed in the housing, and the rotating member is connected to the shaft core, and a limiting rib is disposed on the outer surface of the rotating member along the axial direction of the shaft core; A moving plate and a static plate are arranged in the housing, the moving plate and the static plate are sleeved on the rotating member at intervals, the inner circumference of the moving plate is provided with a limit slot, the limit slot is clamped on the limit rib, and the outer circumference of the static plate is provided with a positioning groove, the positioning groove is clamped on the guide rib; A driving member is disposed in the housing, the driving member is adapted to be connected to the static plate, and the driving member is adapted to drive the static plate to slide along the guide ribs so that the static plate and the dynamic plate are fitted to each other to form a brake.

10. The trailer bogie according to claim 9, characterized in that: A partition is formed in the shell, and the partition is suitable for dividing the interior of the shell into two braking areas. The moving disc, the static disc and the driving member are respectively arranged in each braking area.

11. The trailer bogie according to claim 9, characterized in that: Both ends of the shell are suitable for being closed by end covers, and the end covers are connected to the shaft sleeve, wherein the end covers are provided with weight-reducing and heat-dissipating openings.

12. The trailer bogie according to claim 9, characterized in that: The shaft sleeve is suitable for being connected to the bearing body through a fin plate. Along the direction from the shaft sleeve to the bearing body, the width of the fin plate gradually decreases, and the thickness of the fin plate gradually increases.

13. A rail vehicle, characterized in that: It comprises a center pin, a car body and a trailer bogie as described in any one of claims 1 to 12, wherein the trailer bogie is connected to the car body via an empty spring, and the center pin passes through the center pin channel and is connected to the car body via a traction rod.

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